| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 41 | Refrigerant receiving apparatus | US11070345 | 2005-03-02 | US07395678B2 | 2008-07-08 | Raymond P. Arno; David R. Arno; John A. Carlin |
| A system for modulating refrigerant flow from an evaporator of an air or gas drying apparatus wherein the air or gas drying apparatus has an evaporator shell with at least one exit orifice for return of refrigerant to an accumulator or compressor. The system comprising a flow metering structure connected to the at least one exit orifice, the structure having an internal tube with a vertical rise from an evaporator shell end to an accumulator or compressor end, the internal tube having at least one return orifice (a) which allows passage of liquid refrigerant outside the internal tube into the internal tube, and at least one return orifice (b) which allows passage of gas outside the internal tube into the internal tube. | ||||||
| 42 | Refrigeration cycle | US11207720 | 2005-08-22 | US20050274140A1 | 2005-12-15 | Syunji Komatsu; Kiyokazu Yamamoto |
| It is an object of the invention to provide a refrigeration cycle which uses HFC-152a as refrigerant, and can be operated stably without hunting of the superheat degree. A charge amount of refrigerant is increased, and refrigerant at an inlet of an expansion device is placed in a state where the subcool degree is ensured to be at least 5 degrees such that the subcool degree does not become equal to zero by variation in pressure. This suppresses fluctuation in the superheat degree of refrigerant at an outlet of an evaporator to thereby stabilize the system. In this state, to enhance the efficiency of a compressor, the superheat degree can be increased by decreasing the set value of the expansion device. | ||||||
| 43 | Oil return control in refrigerant system | US10732501 | 2003-12-10 | US20050126193A1 | 2005-06-16 | Alexander Lifson; Michael Taras; Thomas Dobmeier |
| Several control algorithms reduce the likelihood of insufficient oil return to the compressor. One algorithm is useful in a multi-circuit refrigerant system. A control reduces the cooling capacity of one of the circuits if the number of compressor start/stop cycles becomes excessive. By reducing the capacity, the control will reduce the number of compressor start/stop cycles for a circuit. In this manner, the oil continues to circulate through the circuit, and is more efficiently returned to the compressor. Another problem area associated with a poor oil return back to the compressor is when there is low mass flow rate of refrigerant circulating through the system. Various ways of increasing the refrigerant mass flow rate are disclosed to ensure proper oil return to the compressor. Also, if oil return problems are likely due to an undesirably high oil viscosity at the vapor portion of the evaporator or suction line, then steps are taken to reduce oil viscosity. Overall, the present invention discloses three distinct algorithms that may be utilized, either separately or in combination, to ensure better flow of oil back to the compressor. The invention enhances system and compressor reliability and performance as well as prevents the compressor damage. | ||||||
| 44 | Refrigeration expansion valve with thermal mass power element | US10688578 | 2003-10-17 | US06848624B2 | 2005-02-01 | Eugene A. Dianetti; Roy J. Nungesser; Daniel R. Rice; Gary A. Nearpass; Cary Haramoto |
| Thermostatic expansion valve for a vehicle air-conditioning system including a housing and a power element supported by the housing. The power element includes a diaphragm, and a pressure pad disposed against the diaphragm. The pressure pad may be formed in one piece from copper, a copper alloy, or another material, which material may also be a blend, composite, mixture, or other combination, having a thermal conductivity of at least about 800 BTU-in/hr-ft2-° F. (115 W/m-K), and preferably 1200 BTU-in/hr-ft2-° F. (170 W/m-K), and more preferably at least about 2000 BTU-in/hr-ft2-° F. (280 W/m-K), and a density of at least about 0.3 lb/in3 (8 g/cm3), and is connected via a stem to a valve element in the housing to control the refrigerant flow between the condensor and evaporator. The use of such material in the pressure pad reduces the susceptibility of the valve to external temperature changes and reduces the hunting of the valve. | ||||||
| 45 | Thermostatic expansion valve having operation reduced with influence of pressure in a refrigerant passage | US349101 | 1999-07-08 | US6112998A | 2000-09-05 | Yukihiko Taguchi |
| In a thermostatic expansion valve included in a refrigeration cycle for expansion of a refrigerant which is contained in the refrigeration cycle, the thermostatic expansion valve is provided with a particular chamber (14) which is substantially separated from a refrigerant passage (10, 11) for guiding the refrigerant and is connected to the refrigerant passage through an additional passage (15). The particular chamber has pressure relating to pressure in the refrigerant passage when the refrigeration cycle is operated. In order to reduce influence of the pressure in the refrigerant passage, a pressure transmission member (22) transmits the pressure in the particular chamber to a valve mechanism (200a, 201) which is placed in the refrigerant passage to adjust a flow of the refrigerant in the refrigerant passage. An operation control arrangement (205, 206, 207) controls an operation of the valve mechanism in response to temperature of the refrigerant. | ||||||
| 46 | Expansion valve | US915682 | 1997-08-21 | US5957376A | 1999-09-28 | Mitsuya Fujimoto; Kazuhiko Watanabe; Masamichi Yano |
| The expansion valve of the present invention comprises of a heat sensing shaft 36f equipped to the expansion valve 10 and a diaphragm 36a contacting its surface, a large stopper portion 312 for receiving the diaphragm 36a, a large radius portion 314 movably inserted to the lower pressure activate chamber 36c and contacting the back surface of the stopper portion 312 at one end surface and the center of the other end surface formed at the projection 315, and a rod portion 316 whose one end surface fit to the projection 315 of the large radius portion 314 and the other end surface continuing from the valve means 32b, wherein a concave 317 is formed on the outer peripheral of said projection 315. This concave 317 is the fitting means for fitting the resin 101 having low heat transmission rate to the heat sensing shaft in order to prevent the occurrence of hunting phenomenon. | ||||||
| 47 | Refrigerant flow rate control based on liquid level in dual evaporator two-stage refrigeration cycles | US205859 | 1994-03-03 | US5431026A | 1995-07-11 | Heinz Jaster |
| Pulse width modulation is used to control the flow rate through a solenoid expansion valve in a refrigeration system using a dual evaporator, two-stage cycle. The refrigeration cycle includes a phase separator which receives two phase refrigerant from the low temperature evaporator and supplies liquid refrigerant to the pulse width modulated solenoid valve. A liquid level sensor is disposed in the phase separator, and a controller for controlling the duty cycle of the pulse width modulated solenoid valve is provided to receive input from the liquid level sensor. The liquid level sensor can be of the type which provides a continuously variable signal as a function of liquid level, or it can be a liquid level switch which controls valve duty cycle on the basis of whether the phase separator liquid level is above or below a set level. Alternatively, two liquid level switches can be provided. | ||||||
| 48 | Apparatus for monitoring solenoid expansion valve flow rates | US001107 | 1993-01-06 | US5402652A | 1995-04-04 | Richard H. Alsenz |
| A microprocessor controlled system for use in a refrigeration system which includes a plurality of pulse controlled solenoid flow control valves suitable for use as expansion valves is disclosed. A pulse width modulated control signal is generated for cyclically opening and closing the flow through the solenoid expansion valve. The duty cycle of the pulsed control signal determines the average flow rate through the valve. The microprocessor responds to the flow rate through each of the solenoid valves to determine, on a system-wide basis, if each fixture in the system, as indicated by the flow rate through the expansion valve associated therewith, is operating properly. | ||||||
| 49 | Refrigeration system having a self adjusting control range | US72525 | 1993-06-04 | US5392612A | 1995-02-28 | Richard H. Alsenz |
| A closed loop vapor compression refrigeration system wherein the control range of a control parameter for controlling the flow of the refrigerant through the evaporator coil is automatically adjusted as the operating conditions change is disclosed. A control parameter for controlling the refrigerant flow through the evaporator and a dynamic control range for the control parameter are defined. The control range is made a function of certain system parameters. A nonlinear flow control response function associated with the control parameter is selected. During operation, the control range is automatically adjusted as the values of the selected system parameters change. The flow through a flow control device, such as an expansion valve, coupled to the evaporator, is adjusted according to the flow control response function as the value of the control parameter changes. | ||||||
| 50 | Thermal expansion valve | US967339 | 1992-10-28 | US5228619A | 1993-07-20 | Masamichi Yano; Kazuhiko Watanabe; Tetsurou Ikoma; Takashi Okayama |
| A power element-valve housing combined type thermal expansion valve has a diaphragm in an element and a driving member for driving a valve body in a housing by a diaphragm deflection. The diaphragm has a center opening surrounded by a tubular projection, the driving member has an outer flange coaxially supporting the diaphragm and a heat-balance containing blind hold opened to a heat sensitive working fluid in a sealed chamber in the element. A diaphragm catch fits on the projection's periphery and is airtightly welded with a coaxial annular ridge on a supporting surface of the flange to sandwich the diaphragm with the flange. | ||||||
| 51 | Method of using a thermal expansion valve device, evaporator and flow control means assembly and refrigerating machine | US690335 | 1991-04-26 | US5195331A | 1993-03-23 | Bernard Zimmern; Jean L Picouet |
| The expansion valve 103 of the refrigerating machine is controlled by the difference between the pressure in a bulb 104 containing a fixed amount of fluid and the pressure in the evaporator 2. The bulb is mounted in the discharge pipe 1 of the evaporator and is heated by a resistor. In the absence of droplets of liquid refrigerant in the flow through the discharge pipe, i.e when the refrigerant flow rate tends to become too low with respect to the cold demand, the resistor heats up the fluid in the bulb, the pressure in the bulb increases and moves the expansion valve to a more opened position. As soon as droplets hit the bulb in the discharge pipe, said droplets cool down the bulb despite the heating effect of the resistor and the expansion valve is moved to a more closed position. Thus, the flow rate control uses variations in heat transfer coefficients in the discharge pipe rather than superheat temperature in the discharge pipe. The evaporator may be small-sized because it does not have to produce superheat. | ||||||
| 52 | Pulse controlled solenoid valve with low ambient start-up means | US936102 | 1986-11-28 | US4686835A | 1987-08-18 | Richard H. Alsenz |
| A refrigeration system including a solenoid actuated on-off modulated expansion valve and a controller for controlling the expansion valve is disclosed. The controller includes a low ambient start-up means responsive to the presence of liquid refrigerant at the inlet end of the expansion valve for overriding normal operations of the valve and maintaining the expansion valve open for refrigerant flow therethrough when liquid refrigerant is not present at the expansion valve. The low ambient start-up means includes temperature sensors upstream and downstream from the expansion valve to detect the temperature differential across the expansion valve. The temperature differential is compared to a threshold value and depending upon the comparison, either overrides the expansion valve to permit full flow therethrough or to allow the expansion valve to operate in response to the controller. | ||||||
| 53 | Pulse controlled solenoid valve | US639271 | 1984-08-08 | US4651535A | 1987-03-24 | Richard H. Alsenz |
| A pulsed controlled solenoid flow control valve suitable for use in a closed vapor cycle air conditioning system is disclosed. A pulsewidth modulated control signal is generated for cyclically opening and closing the flow through the expansion valve. The duty cycle of the pulsed control signal determines the average flow rate through the valve. An exponential response control curve is used in conjunction with an integrator offset to obtain a single set point control operating point for all flow rates through the valve, where a given change in the second superheat of the evaporator produces the same percentage change in flow rate regardless of the flow rate. | ||||||
| 54 | Control device for refrigeration cycle | US526383 | 1983-08-24 | US4499739A | 1985-02-19 | Fumio Matsuoka; Hitoshi Iijima; Kisuke Yamazaki; Hiroshi Kasagi; Yasuo Nakashima; Kiyoshi Sakuma; Mitsuo Umehara |
| A control device for refrigeration cycle constructed with a compressor, a condenser, an electrically operated expansion valve, an evaporator, and so forth, all being connected in series, wherein there are further provided a by-pass extending from an inlet or an outlet or both of the expansion valve upto an inlet of the compressor through a capillary tube; a first temperature sensor to sense a temperature of a cooling medium at the inlet of the compressor; a second temperature sensor to sense a temperature of the cooling medium within an intake tubing, through which the cooling medium is taken into the inlet of the compressor; and a control device which calculates a super-heat quantity of the cooling medium taken into the compressor on the basis of a difference between the detection outputs of the first and second temperature sensors, and controls a degree of opening of the electrically operated expansion valve, thereby enabling the refrigeration cycle to be operated at high efficiency and in an energy-saving mode. | ||||||
| 55 | EXPANSION VALVE | US15867259 | 2018-01-10 | US20180202696A1 | 2018-07-19 | Ryosuke SATAKE; Takeshi KANEKO |
| An expansion valve includes: a body having a second passage through which a refrigerant returning from an evaporator passes, and a mounting hole communicating with the second passage; a power element mounted on the body in such a manner as to close the mounting hole; a shaft that transmits a drive force from the power element to a valve element; and a plate that separates an open space from the second passage, has an insertion hole, through which the shaft extends, coaxially along a central axis of the plate, and limits a flow of the refrigerant from the second passage into the open space to a flow through a clearance between the shaft and the insertion hole. The insertion hole is formed such that an opening area of the clearance between the shaft and the insertion hole is 7.0 mm2 or smaller. | ||||||
| 56 | AIR CONDITIONING APPARATUS | US14769186 | 2014-07-28 | US20160320113A1 | 2016-11-03 | Sachio SEKIYA; Masanao KOTANI; Shigeyuki SASAKI |
| The air conditioning apparatus of the present invention includes a refrigeration cycle device formed by connecting an outdoor unit equipped with a compressor with a plurality of indoor units, the indoor unit performs an air conditioning operation by switching between an thermo-on operation for performing a cooling operation or a heating operation and a thermo-off operation for suspending the cooling operation or the heating operation by using information on temperature difference between a suction air temperature and a set temperature, and shifts to a start-stop suppression operation mode for making any indoor unit perform the thermo-on operation in a case where an indoor unit A has met a thermo-off condition for switching from the thermo-on operation to the thermos-off operation and in a case where there is none of the indoor units is in the thermo-on operation other than the indoor unit A. | ||||||
| 57 | HVAC SYSTEMS AND METHODS WITH IMPROVED STABILIZATION | US14625609 | 2015-02-18 | US20160238298A1 | 2016-08-18 | Rakesh GOEL; Eric BERG |
| Systems and methods are presented for improving stabilization of a heating, ventilating, and air conditioning (HVAC) system. More specifically, the systems and methods include a heat-flow modulator for regulating an exchange of thermal energy between a flow of refrigerant and a sensory bulb. The exchange of thermal energy allows an expansion valve to respond to a refrigerant temperature using an actuator, which is coupled to the sensory bulb. The heat-flow modulator is formed of a body that includes a first contact surface and a second contact surface. The first contact surface is thermally-coupled to a suction line of the HVAC system, which conveys the flow of refrigerant. The second contact surface is thermally-coupled to the sensory bulb. Other systems and methods are presented. | ||||||
| 58 | Expansion valve and method of producing the same | US12592670 | 2009-12-01 | US20100163637A1 | 2010-07-01 | Makoto Ikegami; Kenichi Fujiwara |
| An expansion valve to expand high-pressure refrigerant and send the expanded refrigerant toward an evaporator is used in a refrigeration cycle, and includes a body portion, an element portion, and a valve portion. The body portion has a first passage through which the high-pressure refrigerant passes, a throttle passage located in the first passage so as to expand refrigerant, and a second passage through which refrigerant flowing out of the evaporator passes. The element portion arranged outside of the body portion has a pressure responding member to be displaced in accordance with a difference between an inner pressure of a seal space and a pressure of refrigerant flowing through the second passage. Temperature sensing media is filled in the seal space, and a pressure of the media is changed by temperature. The valve portion is displaced in accordance with the pressure responding member so as to control an opening of the throttle passage. Additive is filled in the seal space with the media so as to lower a condensing temperature of the media. | ||||||
| 59 | Refrigeration cycle | US11510724 | 2006-08-28 | US20060288732A1 | 2006-12-28 | Syunji Komatsu; Kiyokazu Yamamoto |
| It is an object of the invention to provide a refrigeration cycle which uses HFC-152a as refrigerant, and can be operated stably without hunting of the superheat degree. A charge amount of refrigerant is increased, and refrigerant at an inlet of an expansion device is placed in a state where the subcool degree is ensured to be at least 5 degrees such that the subcool degree does not become equal to zero by variation in pressure. This suppresses fluctuation in the superheat degree of refrigerant at an outlet of an evaporator to thereby stabilize the system. In this state, to enhance the efficiency of a compressor, the superheat degree can be increased by decreasing the set value of the expansion device. | ||||||
| 60 | Oil return control in refrigerant system | US10732501 | 2003-12-10 | US06925822B2 | 2005-08-09 | Alexander Lifson; Michael F. Taras; Thomas J. Dobmeier |
| Several control algorithms reduce the likelihood of insufficient oil return to the compressor. One algorithm is useful in a multi-circuit refrigerant system. A control reduces the cooling capacity of one of the circuits if the number of compressor start/stop cycles becomes excessive. By reducing the capacity, the control will reduce the number of compressor start/stop cycles for a circuit. In this manner, the oil continues to circulate through the circuit, and is more efficiently returned to the compressor. Another problem area associated with a poor oil return back to the compressor is when there is low mass flow rate of refrigerant circulating through the system. Various ways of increasing the refrigerant mass flow rate are disclosed to ensure proper oil return to the compressor. Also, if oil return problems are likely due to an undesirably high oil viscosity at the vapor portion of the evaporator or suction line, then steps are taken to reduce oil viscosity. Overall, the present invention discloses three distinct algorithms that may be utilized, either separately or in combination, to ensure better flow of oil back to the compressor. The invention enhances system and compressor reliability and performance as well as prevents the compressor damage. | ||||||
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