BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a heat insulation chamber which is made of heat insulating material and forms an inner chamber for storing an electronic part, and a thermostatic chamber and a cryostat to which the heat insulation chamber is applied.

2. Description of the Related Art

In recent years, many electronic equipments, which are required to have high performance and reliability, are mounted with a thermostatic chamber which accommodates an device applied in order to obtain a stable operating environment with high reliability, has a loose thermal coupling to the outside, and maintains the operating temperature of the device in a desired range.

Also, in recent years, telecommunication technology has progressed remarkably, and to the main part of communication equipment which configures the communication system, minimizing insertion losses and improving noise figures is severely required.

However, the minimization of insertion losses and the improvement of noise figures can be achieved by applying a superconductive filter and a low noise amplifier (LNA) operating at a cryogenic temperature. Therefore, many communication equipments are provided with cryostats for maintaining in a stable condition of an operating temperature of superconductive filters and low noise amplifiers. Such electronic parts are configured of, for example, HEMT or the like.

FIG. 16

is a diagram showing an exemplary configuration of a conventional cryostat.

In the drawing, a cold head

142

is attached to the bottom of a box-like cabinet

141

which is made of heat insulating material, and an electronic part

143

, which operates at a cryogenic temperature, is mounted on the top of the cold head

142

. Respective through holes

144

-

1

and

144

-

2

are formed among the side walls of the cabinet

141

, which faces the input and output terminals of the electronic part

143

. Respective ends of coaxial cables

145

-

1

and

145

-

2

are connected to these input and output terminals. These coaxial cables

145

-

1

and

145

-

2

are led to the outside of the cabinet

141

through the through holes

144

-

1

and

144

-

2

, which are then sealed with the interior of the cabinet

141

maintained under vacuum. The cold head

142

is connected to a refrigerating machine

147

through a pipe

146

.

In the cryostat configured as described above, the cold head

142

maintains the temperature of an inner chamber (hereinafter indicated with reference number “

141

A” allotted), which is sandwiched between the electronic part

143

and the interior walls of the cabinet

141

, at a cryogenic temperature that the electronic part

143

operates at, by liquid helium circulating through the pipe

146

as a heating medium between the cold head

142

and the refrigerating machine

147

.

The electronic part

143

receives input signals given from a circuit disposed outside of the cabinet

141

through the coaxial cable

145

-

1

, performs a predetermined operation (e.g., filtering as the superconductive filter and amplifying as the low noise amplifier as described above) to the input signals to generate output signals and feeds the output signals to a circuit connected through the coaxial cable

145

-

2

.

In other words, the operating temperature of the electronic part

143

is maintained at a desired cryogenic temperature under the temperature control by the refrigerating machine

147

, the pipe

146

, and the cold head

142

, so that the electronic part

143

exhibits predetermined characteristics and performance under the operating temperature and operates in cooperation with the circuit disposed outside of the cabinet

141

as described above.

In the conventional case described above, the coaxial cables

145

-

1

and

145

-

2

are not only conductors but also heat conductors. Therefore, the refrigerating machine

147

unnecessarily consumed a large quantity of electric power to keep the operating temperature of the electronic part

143

from rising by absorbing heat flowing from the outside of the cabinet

141

into the input and output terminals of the electronic part

143

through the coaxial cables

145

-

1

,

145

-

2

.

Technologies for decreasing heat quantity of heat flowing in from the outside as described above include, for example, a technology which uses a conductor with a low thermal conductivity for the inner conductor and outer conductor of the coaxial cables

145

-

1

and

145

-

2

and a technology which sets the cross section of the inner conductor and outer conductor to a small value. But, none of such technologies have actually been used because insertion losses of the coaxial cables

145

-

1

and

145

-

2

increased to an intolerable level.

And, when the quantity of heat flowing in from the outside through the coaxial cables

145

-

1

and

145

-

2

is large, either the operating temperature of the electronic part

143

is not secured, or it is necessary to use a refrigerating machine having higher performance as the refrigerating machine

147

.

Moreover, in connecting the coaxial cables

145

-

1

and

145

-

2

with the input and output terminals of the electronic part

143

, they are generally soldered directly, or, each plug previously fitted to the coaxial cables

145

-

1

and

145

-

2

is engaged to each receptacle which is previously soldered to the electronic part

143

.

However, the thermal expansion coefficients of the input and output terminals of the electronic part

143

and the receptacles or the coaxial cables

145

-

1

and

145

-

2

are generally considerably different.

Therefore, there has been a possibility of a disconnection or an unnecessary increase insertion losses between the coaxial cables

145

-

1

and

145

-

2

and the input and output terminals of the electronic part

143

during a large change in the temperature of the inner chamber

141

A such as at the moment of activating or stopping.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a heat insulation chamber, a thermostatic chamber, and a cryostat which maintain the operating temperature efficiently and also maintain coupling with a circuit disposed outside in a stable condition.

It is also an object of the present invention to improve the performance and reliability of electronic appliances as well as to reduce their costs and dimentions.

The above-described objects are achieved by a heat insulation chamber, which comprises a cabinet which forms an inner chamber for accommodating an electronic part and is made of heat insulating material; and coupling means which is disposed in the inner chamber or the cabinet, connected to the electronic part, and forms a radio transmission path to an antenna disposed outside of the cabinet.

In this heat insulation chamber, the thermal conductivity of the radio transmission path is generally smaller than that of a conductor, so that heat flowing in and out between the outside and the inner chamber is suppressed more than in the prior art. Moreover, an antenna is not disposed in the inner chamber formed by the cabinet.

Therefore, the electronic part of which the operating temperature is maintained in a stable condition and is downsized, allowing the maintenance of high flexibility in arranging the cabinet's inner layout.

And, the above-described objects can be achieved by a heat insulation chamber, which comprises a cabinet which forms an inner chamber for accommodating an electronic part and is made of heat insulating material; an antenna which is disposed in the inner chamber or the cabinet; a feeder which leads the feeding point of the antenna to the outside of the cabinet;

and coupling means which is disposed in the inner chamber or the cabinet, connects the feeding point to the electronic part, and forms a radio transmission path to the antenna.

In this heat insulation chamber, the thermal conductivity of the radio transmission path is generally smaller than that of a conductor, so heat flowing in and out between the outside and the inner chamber is suppressed more than in the prior art. Besides, both the antenna and the coupling means are disposed in the inner chamber formed of the cabinet, so the transfer characteristics of the radio transmission path suddenly or extensively changing hardly happens even when the outside environment of the cabinet changed.

Therefore, the operating temperature and the operating environment of the electronic part are maintained in a stable condition.

The above-described objects can also be achieved by a heat insulation chamber, which comprises a cabinet which forms an inner chamber for accommodating an electronic part and is made of heat insulating material; and coupling means which is disposed in the inner chamber or the cabinet, is connected to the electronic part, and forms a coupling path with a device disposed outside of the cabinet by static coupling and/or inductive coupling.

In such heat insulation chamber, the thermal conductivity of the coupling path is generally considerably smaller than that of a conductor, so heat flowing in and out between the outside and the inner chamber is suppressed more than in the prior art. Besides, the device is not disposed in the inner chamber formed by the cabinet.

Therefore, the electronic part of which the operating temperature is maintained in a stable condition and is downsized, allowing the maintenance of high flexibility in arranging the cabinet's inner layout.

The above-described objects can also be achieved by a heat insulation chamber, which comprises a cabinet which forms an inner chamber for accommodating an electronic part and is made of heat insulating material; a device which is disposed in the inner chamber or the cabinet; a conductor which leads the terminal of the device to the outside of the cabinet; and coupling means which is disposed in the inner chamber or the cabinet, is connected to the electronic part, and forms a coupling path with the device by static coupling and/or inductive coupling.

In this heat insulation chamber, the thermal conductivity of the radio transmission path is generally smaller than that of a conductor, so heat flowing in and out between the outside and the inner chamber is suppressed more than in the prior art. Besides, both the antenna and the coupling means are disposed in the inner chamber formed of the cabinet, so the transfer characteristics of the radio transmission path suddenly or extensively changing hardly happens even when the outside environment of the cabinet changed.

Therefore, the operating temperature and the operating environment of the electronic part are maintained in a stable condition.

Besides, the above-described objects can be achieved by forming a partition between the outside of the cabinet and the inner chamber for accommodating the electronic part and disposing the coupling means together with the electronic part in the inner chamber.

According to such configuration, the coupling means is disposed together with the electronic part in the inner chamber, so the operating temperature of the electronic part is maintained in a stable condition, the mechanical configuration is simplified, and coupling with the electronic part can be made close.

The above-described objects can also be achieved by forming a partition between the outside of the cabinet and the inner chamber for accommodating the electronic part and disposing the coupling means in a region sandwiched between the outer wall of the cabinet and the interior wall of the inner chamber.

According to such configuration, the coupling means is disposed in a region other than the inner chamber but within the outer walls of the cabinet.

Therefore, the radio transmission path or the coupling path is formed between the electronic part and the outside of the cabinet in a stable condition without remarkable or sudden changes in transmission characteristics and transfer characteristics owing to the environment and the medium of the inner chamber where the electronic part is disposed.

Besides, the above-described objects are achieved by forming the inner chamber as an aggregate of a plurality n of cells individually including subdomains which are formed by dividing a region where the electronic part is to be disposed.

According to such configuration, thermal couplings among the cells become loose.

Therefore, temperatures of respective parts of the electronic part are individually varied due to the heat flowing in and out between the outside and the inner chamber, and the changes in characteristics are localized due to the variations in temperatures.

The above-described objects are also achieved by configuring the coupling means as an aggregate of a plurality K of coupling means which are individually connected to a plurality K of terminals of the electronic part and disposed in the inner chamber; and forming the inner chamber as an aggregate of a plurality K of cells in which pairs of the plurality K of terminals and the plurality K of coupling means are respectively disposed, and which are divided by a conductor grounded outside.

According to such configuration, the coupling among the cells is suppressed, and pairs of the coupling means and the terminals of the electronic part individually connected to these coupling means are respectively disposed in these cells.

Therefore, undesirable electric coupling in the inner chamber is suppressed or prevented.

The above-described objects can also be achieved by forming the inner chamber in the shape and size capable of containing a casing of the electronic part.

According to such configuration, the electronic part is accommodated in the inner chamber without having the casing removed.

Therefore, the operating temperature of the electronic part is maintained in a stable condition in the heat protection configuration that is formed in duplex structure by the interior of the casing and the inner chamber.

The above-described objects can also be achieved by the coupling means having a filtering characteristic that has a pass band in an occupied band of signals to be transmitted between the electronic part and the outside through the coupling means.

According to such configuration, the band of the signals transmitted between the terminals of the electronic part and the equipments or circuits disposed outside of the cabinet are limited to the occupied band of the signals.

Therefore, noise given through the equipments or circuits or noise generated by the electronic part is suppressed.

The above-described object can also be achieved by setting a thermal conductivity between the outside of the cabinet and the inner chamber to a value that the temperature at which the electronic part operates is maintained under the distribution of temperatures outside of the cabinet.

According to such configuration, the electronic part operates in a stable condition without having means for raising or lowering the temperatures of the inner chamber as long as the outside temperature of the cabinet shifts within the range of temperature distribution applied when the thermal conductivity is determined.

Besides, the above-described objects can be achieved by a thermostatic chamber which comprises the heat insulation chamber configured as described above; and a heat exchanging means that performs heat exchange with an inner chamber formed in a cabinet under control of a thermoregulator which maintains an operating temperature of the electronic part accommodated into the cabinet configuring the heat insulation chamber.

According to such configuration, when activated, the temperature of the inner chamber is set more quickly to a temperature at which the electronic part operates under the heat exchange as compared with the heat insulation chamber in which the heat exchange is not performed at all, and the temperature thus set is securely maintained even under the environment that the outside temperature of the cabinet largely varies.

The above-described objects can also be achieved by a cryostat that is configured by the heat exchanging means that maintains the temperature of the inner chamber at a cryogenic temperature that the electronic part is to operate under control of the thermoregulator.

By this cryostat, energy required for the heat exchange performed by the heat exchanging means is decreased because quantity of heat flowing from the outside of the cabinet into the inner chamber decreases more than in the prior art.

Other objects and features of the present invention will be apparent from the following detailed description with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1

is a diagram showing the principle of the first heat insulation chamber according to the present invention;

FIG. 2

is a diagram showing the principle of the second heat insulation chamber according to the present invention;

FIG. 3

is a diagram showing the principle of the third heat insulation chamber according to the present invention;

FIG. 4

is a diagram showing the principle of the fourth heat insulation chamber according to the present invention;

FIG. 5

is a diagram showing the principle of the fifth heat insulation chamber according to the present invention;

FIG. 6

is a diagram showing the principle of a thermostatic chamber and a cryostat according to the present invention;

FIG. 7

is a diagram showing the first and seventh embodiments according to the present invention;

FIG. 8

is a diagram showing the configuration of a coupling part of the embodiment;

FIG. 9

is a diagram showing another configuration of the first embodiment according to the present invention;

FIG. 10

is a diagram showing the second embodiment according to the present invention;

FIG. 11

is a diagram showing the configuration of a coupling module;

FIG. 12

is a diagram showing the third embodiment according to the present invention;

FIG. 13

is a diagram showing the fourth embodiment according to the present invention;

FIG. 14

is a diagram showing the fifth embodiment according to the present invention;

FIG. 15

is a diagram showing the sixth embodiment according to the present invention; and

FIG. 16

is a diagram showing an example of a configuration of a conventional cryostat.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The principle of a heat insulation chamber according to the present invention will be described with reference to FIG.

1

.

FIG. 1

is a diagram showing the principle of the first insulation chamber according to the present invention.

The heat insulation chamber shown in

FIG. 1

comprises a cabinet

12

forming an inner chamber for accommodating an electronic part

11

, an antenna

13

and a coupling means

14

which are respectively disposed outside and inside of the cabinet

12

, partitions

51

-

1

to

51

-N formed by the cabinetl

2

, and cells

12

A-

1

to

12

A-n which are formed by dividing the inner chamber.

The first principle of the heat insulation chamber according to the present invention is as follows.

The cabinet

12

forms the inner chamber for accommodating the electronic part

11

and is made of heat insulating material.

The coupling means

14

is disposed in the inner chamber or the cabinet

12

, is connected to the electronic part

11

, and forms a radio transmission path to the antenna

13

which is disposed outside of the cabinet

12

.

The heat insulation chamber configured as described above has the following functions.

The electronic part

11

is accommodated in the inner chamber formed by the cabinet

12

that is made of heat insulating material.

The electronic part

11

transmits and/or receives desired radio signals through the radio transmission path formed by the coupling means

14

with the antenna

13

which is disposed outside of the cabinet

12

with equipments or circuits, to which a feeding point of the antenna

13

is connected.

Thermal conductivity of such radio transmission paths are generally considerably small as compared with that of a conductor, so heat which flows from the outside into the inner chamber or flows out of the inner chamber is suppressed as compared with the above-described prior art in which the radio signals are transmitted through wire.

Therefore, the electronic part

11

can output the radio signals with an operating temperature kept in a stable condition or can desirably process the radio signals.

The inner chamber formed by the cabinet

12

does not have the antenna

13

disposed, so it can be downsized and maintain high flexibility in arranging its inner layout.

Now, the second principle of the heat insulation chamber according to the present invention will be described with reference to FIG.

2

.

FIG. 2

is a diagram showing the second principle of the heat insulation chamber according to the present invention.

The heat insulation chamber shown in

FIG. 2

comprises a cabinet

12

forming an inner chamber in which an electronic part

11

is accommodated, an antenna

21

and a coupling means

23

which are disposed to face each other in the cabinet

12

, a feeder

22

for leading the feeding point of the antenna

21

to the outside, partitions

51

-

1

to

51

-N formed by the cabinet

12

, and cells

12

A-

1

to

12

A-n which are formed by dividing the inner chamber.

The second principle of the heat insulation chamber according to the present invention is as follows.

The cabinet

12

forms the inner chamber for accommodating the electronic part

11

and is made of heat insulating material. The antenna

21

is disposed in the inner chamber or the cabinet

12

. The feeder

22

leads the feeding point of the antenna

21

to the outside of the cabinet

12

. The coupling means

23

is disposed in the inner chamber or the cabinet

12

, has the feeding point connected to the electronic part

11

and forms a radio transmission path to the antenna

21

.

The heat insulation chamber configured as described above has the following functions.

The electronic part

11

is accommodated in the inner chamber formed by the cabinet

12

that is made of heat insulating material. The coupling means

23

is disposed in the inner chamber or the cabinet

12

and forms a radio transmission path to the antenna

21

which has the feeding point leading to the outside of the cabinet

12

through the feeder

22

. The electronic part

11

transmits and/or receives desired radio signals through the radio transmission path with the equipments or circuits which are connected to the feeder

22

at the outside of the cabinet

12

.

Thermal conductivity of the radio transmission path is generally considerably small as compared with that of a conductor, so that heat which flows in and out between the outside and the inner chamber is suppressed as compared with the above-described prior art in which the radio signals are transmitted through wires.

Therefore, the electronic part

11

can output the radio signals with an operating temperature kept in a stable condition or can desirably process the radio signals.

The inner chamber formed by the cabinet

12

has the antenna

21

and the coupling means

23

disposed, so the transfer characteristics of the radio transmission path suddenly or extensively changing hardly happens even when the outside environment of the cabinet

12

has changed.

Therefore, the operating environment of the electronic part

11

is maintained in a stable condition.

The third principle of the heat insulation chamber according to the present invention will be described with reference to FIG.

3

.

FIG. 3

is a diagram showing the third principle of the heat insulation chamber according to the present invention.

The heat insulation chamber shown in

FIG. 3

comprises a cabinet

12

forming an inner chamber in which an electronic part

11

is accommodated, a device

31

and a coupling means

32

which are respectively disposed outside and inside of the cabinet

12

, partitions

51

-

1

to

51

-N formed by the cabinet

12

, and cells

12

A-

1

to

12

A-n which are formed by dividing the inner chamber.

The third principle of the heat insulation chamber according to the present invention is as follows.

The cabinet

12

forms the inner chamber in which the electronic part

11

is accommodated, and is made of heat insulating material. The coupling means

32

is disposed in the inner chamber or the cabinet

12

, is connected to the electronic part

11

and forms a coupling path by static coupling and/or inductive coupling to the device

31

disposed outside of the cabinet

12

.

The heat insulation chamber configured as described above has the following functions.

The electronic part

11

is accommodated in the inner chamber formed by the cabinet

12

which is made of heat insulating material. Moreover, the electronic part

11

transmits and/or receives desired signals with the equipments or circuits connected to the device

31

, through a coupling path which is formed between the coupling means

32

and the device

31

disposed outside of the cabinet

12

by static coupling and/or inductive coupling.

Thermal conductivity of the coupling path is generally considerably small as compared with that of a conductor, so that quantity of heat which flows in and out between the outside and the inner chamber is suppressed as compared with the prior art in which the signals are transmitted through wires.

Therefore, the electronic part

11

can output the signals with the operating temperature kept in a stable condition or can desirably process the signals.

The inner chamber formed by the cabinet

12

does not have the device

31

disposed, so it can be downsized, and allowing the maintenance of high flexibility in arranging its inner layout.

The fourth principle of the heat insulation chamber according to the present invention will be described with reference to FIG.

4

.

FIG. 4

is a diagram showing the fourth principle of the heat insulation chamber according to the present invention.

The heat insulation chamber shown in

FIG. 4

comprises a cabinet

12

forming an inner chamber in which an electronic part

11

is accommodated, a device

41

and a coupling means

43

which are disposed to face each other in the cabinet

12

, a conductor

42

whose one end is connected to the device and the other end of which is led to the outside of the cabinet

12

, partitions

51

-

1

to

51

-N formed by the cabinet

12

, and cells

12

A-

1

to

12

A-n which are formed by dividing the inner chamber.

The fourth principle of the heat insulation chamber according to the present invention is as follows.

The cabinet

12

forms the inner chamber for accommodating the electronic part

11

and is made of heat insulating material.

The device

41

is disposed in the inner chamber or the cabinet

12

. The conductor

42

leads a terminal of the device

41

to the outside of the cabinet

12

. The coupling means

43

is disposed in the inner chamber or the cabinet

12

, is connected to the electronic part

11

and forms a coupling path with the device

41

by static coupling and/or inductive coupling.

The heat insulation chamber configured as described above has the following functions.

Moreover, the electronic part

11

is accommodated in the inner chamber formed by the cabinet

12

which is made of heat insulating material. The coupling means

43

is disposed in the inner chamber or the cabinet

12

, and forms a coupling path to the device

41

, which is led to the outside of the cabinet

12

through the conductor

42

, by static coupling and/or inductive coupling.

The electronic part

11

transmits and/or receives desired radio signals with the equipments or circuits which are connected to the conductor

41

at the outside of the cabinet

12

through the coupling path.

Thermal conductivity of the coupling path is generally considerably small as compared with that of a conductor, so heat which flows in and out between the outside and the inner chamber is suppressed as compared with the prior art in which the signals are transmitted through wires.

Therefore, the electronic part

11

can output the signals with an operating temperature kept in a stable condition or can desirably process the signals.

The inner chamber formed by the cabinet

12

has the device

41

and the coupling means

43

disposed inside, so the transfer characteristics of the coupling path suddenly or extensively changing hardly happens even if the outside environment of the cabinet

12

has changed.

Therefore, the operating environment of the electronic part

11

is maintained in a stable condition.

The fifth principle of the heat insulation chamber according to the present invention will be described with reference to

FIG. 1

to FIG.

4

.

The cabinet

12

forms the partitions

51

-

1

to

51

-N between the outside and the inner chamber in which the electronic part

11

is accommodated. The coupling means

14

,

23

,

32

, and

43

are disposed together with the electronic part

11

in the inner chamber.

The heat insulation chamber configured as described above has the partitions

51

-

1

to

51

-N between the outside of the cabinet

12

and the inner chamber in which the electronic part

11

is accommodated, so a single or multiple inner chamber(s) is/are formed in a layer between the inner chamber and the outside of the cabinet

12

by the partitions

51

-

1

to

51

-N.

Therefore, the operating temperature of the electronic part

11

is maintained in a stable condition with the weight kept from increasing.

The coupling means

14

,

23

,

32

, and

43

are disposed together with the electronic part

11

in the inner chamber, so the mechanical configuration can be simplified and coupling with the electronic part

11

can be made close as compared with the case that the coupling means

14

,

23

,

32

, and

43

are disposed in any of the inner chambers formed by the partitions

51

-

1

to

51

-N as described above.

The sixth principle of the heat insulation chamber according to the present invention will be described with reference to

FIG. 1

to FIG.

3

.

The cabinet

12

forms the partitions

51

-

1

to

51

-N between the outside and the inner chamber in which the electronic part

11

is accommodated. The coupling means

14

,

23

,

32

, and

43

are disposed in the region sandwiched between the outer wall of the cabinet

12

and the interior wall of the inner chamber.

The heat insulation chamber configured as described above has the partitions

51

-

1

to

51

-N between the outside of the cabinet

12

and the inner chamber in which the electronic part

11

is accommodated, so that a single or multiple inner chamber(s) is/are formed in a layer between the inner chamber and the outside of the cabinet

12

by the partitions

51

-

1

to

51

-N.

Therefore, the operating temperature of the electronic part

11

is maintained in a stable condition with the weight kept from increasing.

The coupling means

14

,

23

,

32

, and

43

are disposed within the side walls of the cabinet

12

but in a region other than the above-described inner chambers, so that transmission characteristics and transfer characteristics does not change remarkably or suddenly because of the medium or environment in the inner chambers where the electronic part

11

is disposed and a radio transmission path or coupling path is formed in a stable condition between the electronic part

11

and the outside of the cabinet

12

.

The seventh principle of the heat insulation chamber according to the present invention will be described with reference to

FIG. 1

to FIG.

4

.

The inner chamber is formed as an aggregate of a plurality n of cells

12

A-

1

to

12

A-n individually including subdomains formed by dividing the region where the electronic part

11

is disposed.

The heat insulation chamber configured as described above has the inner chamber, where the electronic part

11

is accommodated, formed as an aggregate of a plurality n of cells

12

A-

1

to

12

A-n individually including subdomains formed by dividing the region where the electronic part

11

is disposed.

Thermal coupling among the cells

12

A-

1

to

12

A-n is loose, so temperatures of respective parts of the electronic part

11

independently vary due to the heat flowing from the outside into the inner chamber or flowing out of the inner chamber, and the changes in characteristics are localized due to the variations in temperatures.

The eighth principle of the heat insulation chamber according to the present invention will be described with reference to FIG.

5

.

FIG. 5

is a diagram showing the fifth principle of the heat insulation chamber according to the present invention.

The heat insulation chamber shown in

FIG. 5

comprises a cabinet

12

forming cells

62

-

1

to

62

-K in which an electronic part

11

is accommodated, coupling means

14

-

1

to

14

-K,

23

-

1

to

23

-K,

32

-

1

to

32

-K, and

43

-

1

to

43

-K individually disposed in the cells

62

-

1

to

62

-K, and partitions

51

-

1

to

51

-N formed by the cabinet

12

.

The eighth principle of the heat insulation chamber according to the present invention is as follows.

The coupling means

14

,

23

,

32

, and

43

are individually connected to a plurality K of terminals

61

-

1

to

61

-K of electronic part

11

and are configured as an aggregate of a plurality K of coupling means

14

-

1

,

23

-

1

,

32

-

1

,

43

-

1

, . . . ,

14

-K,

23

-K,

32

-K, and

43

-K disposed within the inner chamber. The inner chamber is formed as an aggregate of a plurality K of cells

62

-

1

to

62

-K in which pairs of the plurality K of terminals

61

-

1

to

61

-K and the plurality K of coupling means

14

-

1

,

23

-

1

,

32

-

1

,

43

-

1

, . . . ,

14

-K,

23

-K,

32

-K, and

43

-K are individually disposed and are divided by a conductor which is grounded outside of the inner chamber.

The heat insulation chamber configured as described above has the following functions.

The inner chamber in which the electronic part

11

is accommodated is formed as an aggregate of the plurality K of cells

62

-

1

to

62

-K in which the pairs of the plurality K of terminals

61

-

1

to

61

-K of the electronic part

11

and the coupling means

14

-

1

,

23

-

1

,

32

-

1

,

43

-

1

, . . . ,

14

-K,

23

-K,

32

-K, and

43

-K respectively connected to the terminals

61

-

1

to

61

-K are individually disposed and are divided by the conductor grounded outside of the inner chamber.

In other words, the cells

62

-

1

to

62

-K are electrically shielded from one another, and the pairs of the coupling means

14

-

1

,

23

-

1

,

32

-

1

,

43

-

1

, . . . ,

14

-K,

23

-K,

32

-K, and

43

-K and the terminals

61

-

1

to

61

-K of the electronic part

11

individually connected to the coupling means

14

-

1

,

23

-

1

,

32

-

1

,

43

-

1

, . . . ,

14

-K,

23

-K,

32

-K, and

43

-K are individually disposed in the cells

61

-

1

to

62

-K, so undesirable electric coupling is suppressed or prevented in the inner chamber.

The ninth principle of the heat insulation chamber according to the present invention will be described with reference to FIG.

5

.

The inner chamber is formed in the shape and size capable of containing a casing

11

A in which the main body of the electronic part

11

is accommodated.

In the heat insulation chamber configured as described above, the electronic part

11

is accommodated in the unique casing

11

A, and the inner chamber in which the electronic part

11

is accommodated is formed in the shape and size capable of containing the casing

11

A.

In other words, the electronic part

11

is accommodated into the inner chamber without removing the casing

11

A, so the operating temperature of the electronic part