141 |
Air-conditioning apparatus with regulation of injection flow rate |
US14238541 |
2011-11-07 |
US09797610B2 |
2017-10-24 |
Koji Yamashita; Takeshi Hatomura; Katsuhiro Ishimura |
An air-conditioning apparatus includes a suction-injection pipe that introduces a refrigerant in a liquid or two-phase state into a suction side of a compressor, an expansion device that is arranged at the suction-injection pipe, and a controller that regulates the suction-injection flow rate of a refrigerant introduced into the suction side of the compressor through the suction-injection pipe by controlling the opening degree of the expansion device. |
142 |
Air-conditioning apparatus |
US14347820 |
2011-11-30 |
US09791180B2 |
2017-10-17 |
Daisuke Shimamoto; Osamu Morimoto; Takayoshi Honda; Koji Azuma; Koji Nishioka |
An air-conditioning apparatus includes a temperature sensor for detecting a temperature of the heat medium sent from each of the intermediate heat exchangers to each of the use-side heat exchangers, and a temperature of the heat medium that has exited each of the use-side heat exchangers, an opening degree controller for regulating a flow rate of the heat medium through each of the heat medium flow control devices, and a computing unit for computing a usage capacity of each of the indoor units from a rotation speed of the pump, an opening degree of each of the heat medium flow control devices, temperatures detected by the temperature sensors, and power consumption of each of the indoor units, and proportionally dividing the power consumption for a common portion among each of the indoor units based on the computed usage capacity and the power consumption of the common portion. |
143 |
AIR-CONDITIONING AND HOT WATER SUPPLYING COMPOSITE SYSTEM |
US15518629 |
2014-11-27 |
US20170234576A1 |
2017-08-17 |
Tomokazu KAWAGOE; Hirofumi KOGE; Osamu MORIMOTO |
An air-conditioning and hot water supplying composite system includes a heat source unit and a heat source-side heat exchanger, an indoor heat source unit, a hot water supply unit connected to the heat source unit and including a hot water supply-side heat exchanger and a hot water supply-side expansion device, and a controller that controls the heat source unit. The controller includes a mode switching unit that switches a control mode of the air-conditioning and hot water supplying composite system between a hot water supply control mode, a hot water supply preheating mode, and a condensing temperature control unit. The condensing temperature control unit determines the target condensing temperature according to a temperature of a heat medium subjected to heat exchange by the hot water supply unit, in the hot water supply control mode. |
144 |
Heat pump of heat source tower for realizing solution regeneration and heat reutilization based on vacuum boiling |
US14432464 |
2013-11-15 |
US09671143B2 |
2017-06-06 |
Caihua Liang; Hua Gao; Dongmei Jiang; Xiaosong Zhang |
The disclosure provides a heat source tower heat pump realizing solution regeneration and heat reutilization based on vacuum boiling. It comprises a refrigerant circuit, a solution circuit, a vacuum maintenance circuit, an air circuit, a regenerative solution heating circuit and a cold/hot water circuit. The unit provided by the disclosure regenerates a solution by taking full advantage of the characteristic that the boiling point of a solution will be reduced in vacuum, uses the heat released from the cooling of overheated refrigerant as the heat of solution regeneration and also uses the heat to produce heat supply hot water. While significantly raising the speed of solution regeneration, it also realizes efficient reutilization of solution regeneration heat, thoroughly solves the problem of solution regeneration of the heat pump of heat source tower system, improves the safety and reliability of the heat pump of heat source tower system in various operating conditions and realizes high overall efficiency of the system. |
145 |
Method for selecting heat medium of use side heat exchanger in installing air-conditioning system |
US14360712 |
2011-11-30 |
US09644906B2 |
2017-05-09 |
Daisuke Shimamoto; Osamu Morimoto; Takayoshi Honda; Koji Azuma; Koji Nishioka |
A method for selecting a heat medium in installing an air-conditioning system includes: determining power required for use side heat exchangers corresponding to a plurality of air-conditioned spaces; calculating a total refrigerant amount required when a refrigerant is circulated through all the use side heat exchangers having the determined power; calculating a refrigerant concentration when the total refrigerant amount leaks to each air-conditioned space using the refrigerant, for each air-conditioned space; determining the refrigerant concentration for each air-conditioned space exceeds a predetermined limit concentration; when any air-conditioned space exceeds the limit concentration, selecting, as a nontoxic medium, the circulation heat medium of the use side heat exchanger installed in one of the air-conditioned spaces; and calculating a total refrigerant amount required when the refrigerant is circulated through all other use side heat exchangers. |
146 |
Air-conditioning apparatus |
US14119951 |
2011-06-29 |
US09638447B2 |
2017-05-02 |
Koji Yamashita; Shinichi Wakamoto; Naofumi Takenaka; Kosuke Tanaka |
In an air-conditioning apparatus, a controller controls an amount of refrigerant injection into a compressor by controlling an opening area of an expansion device such that the electric power consumption of the compressor becomes smaller, or such that a heating capacity or a cooling capacity of an intermediate heat exchanger becomes larger. |
147 |
Refrigeration cycle apparatus |
US14345300 |
2011-10-04 |
US09631847B2 |
2017-04-25 |
Shogo Tamaki; Makoto Saito; Ryo Oya |
The volume ratio of a hot-water-supply-side liquid extension pipe to a water heat exchanger is set to be equal to or more than the minimum volume ratio, which is the volume ratio of the hot-water-supply-side liquid extension pipe to the water heat exchanger when the required refrigerant amount during a cooling and hot water supply simultaneous operation in which an indoor-side heat exchanger serves as an evaporator, the water heat exchanger serves as a condenser, cooling energy is supplied from the indoor-side heat exchanger, and heating energy is supplied from the water heat exchanger is equal to the required refrigerant amount during a heating operation in which a heat-source-side heat exchanger serves as an evaporator, the indoor-side heat exchanger serves as a condenser, and heating energy is supplied from the indoor-side heat exchanger. |
148 |
Combined air-conditioning and hot-water supply system |
US14647510 |
2012-12-11 |
US09631826B2 |
2017-04-25 |
Takanao Kimura; Hirofumi Kouge; Hironori Yabuuchi |
The controller controls a bypass solenoid valve and hot-water supply expansion unit in a defrosting operation based on a refrigerant temperature detected by a first temperature sensor and a heat medium temperature detected by a second temperature sensor. |
149 |
Combined air-conditioning and hot-water supply system |
US13881449 |
2010-12-15 |
US09625187B2 |
2017-04-18 |
Tomokazu Kawagoe; Hirofumi Koge |
A combined air-conditioning and hot-water supply system that, if a temperature that is set in a hot-water supply unit is higher than a temperature of refrigerant discharged from a compressor when the combined air-conditioning and hot-water supply system is in a heating operation cycle state, increases a target condensing temperature of an outdoor unit above the target condensing temperature that has been set, and controls an opening degree of an indoor expansion device to be less than the opening degree that has been set, such that a heating load of an indoor unit is maintained constant. |
150 |
COMPRESSOR AND REFRIGERATION CYCLE APPARATUS |
US15125219 |
2014-03-17 |
US20170097176A1 |
2017-04-06 |
Koji YAMASHITA |
A compressor is configured to form a refrigerant circuit using refrigerant containing a substance having such a property as to cause a disproportionation reaction, and includes a shell serving as an outer shell, a compression chamber installed inside the shell, the compression chamber being configured to compress the sucked refrigerant, cause the compressed refrigerant to flow into the shell to place the shell under a high-pressure refrigerant atmosphere, and discharge the compressed refrigerant externally, and a motor configured to feed power to the compressor. With the configuration described above, a disproportionation reaction is made unlikely to occur. As a result, the substance having such a property as to cause a disproportionation reaction can be used safely as the refrigerant. |
151 |
Air-conditioning apparatus and relay unit |
US13056826 |
2008-10-29 |
US09587843B2 |
2017-03-07 |
Koji Yamashita; Hiroyuki Morimoto; Yuji Motomura; Takeshi Hatomura; Naoki Tanaka; Shinichi Wakamoto; Takashi Okazaki; Yusuke Shimazu |
A refrigeration cycle is configured by connecting a compressor, a four-way valve, a heat source side heat exchanger, expansion valves, and intermediate heat exchangers by piping. A heat medium circulation circuit is configured by connecting intermediate heat exchangers, pumps, and use side heat exchangers by piping. The outdoor unit accommodates the compressor, the four-way valve, and the heat source side heat exchanger, and the relay unit that is installed in a non-subject space which is different from an indoor space and is on an installation floor separated by two or more floors and accommodates the expansion valves, the pump, and intermediate heat exchangers are connected by two pipelines. The relay unit and an indoor unit that accommodates use side heat exchangers and is installed at a position where an indoor space can be air-conditioned are connected by two pipelines. |
152 |
Heat pump system |
US13202372 |
2010-02-22 |
US09581361B2 |
2017-02-28 |
Masahiro Honda |
A heat pump system includes a heat source unit, a discharge refrigerant communication tube, a liquid refrigerant communication tube, a gas refrigerant communication tube, a first usage unit and a second usage unit. The first usage unit has a first usage-side heat exchanger capable of functioning as a radiator of the heat-source-side refrigerant introduced from the discharge refrigerant communication tube. The first usage unit is capable of performing operation in which an aqueous medium is heated by radiation of the heat-source-side refrigerant in the first usage-side heat exchanger. The second usage unit has a second usage-side heat exchanger capable of functioning as an evaporator of the heat-source-side refrigerant introduced from the liquid refrigerant communication tube. The second usage unit is capable of performing operation in which an air medium is cooled by evaporation of the heat-source-side refrigerant in the second usage-side heat exchanger. |
153 |
REFRIGERATION APPARATUS |
US15070843 |
2016-03-15 |
US20160273816A1 |
2016-09-22 |
Naoto HORIUCHI |
A refrigeration apparatus includes a compressor, first and second heat exchangers, first and second electric valves, a passage-switching valve, a supercooling heat exchanger, and a controller. The first and second valves are disposed in first and second refrigerant passages. The supercooling heat exchanger conducts heat exchange between refrigerant flowing through the first and second refrigerant passages. The controller transitions to a defrosting operation mode upon determining that frost has formed on the second heat exchanger during a heating operation mode. The controller executes a defrosting preparatory control and a defrosting control after the defrosting preparatory control during the defrosting operation mode. The controller switches the passage-switching valve during the defrosting control. The controller narrows the opening degree of the first electric valve and controls the opening degree of the second electric valve to a minimum opening degree during the defrosting preparatory control. |
154 |
Air-conditioning apparatus including intermediate heat exchangers |
US14006551 |
2012-01-23 |
US09441862B2 |
2016-09-13 |
Asako Tamura; Naofumi Takenaka; Shinichi Wakamoto; Susumu Yoshimura; Koji Yamashita |
An air-conditioning apparatus in which a primary-side refrigerant in a two-phase gas-liquid state that has flowed into each of intermediate heat exchangers absorbs heat from a secondary-side refrigerant flowing in counterflow to the primary-side refrigerant, and evaporates and turns into a low-temperature, low-pressure gas state. The air-conditioning apparatus ensures high heat exchange efficiency even when a direction of a heat source-side refrigerant (secondary-side refrigerant) flowing through an intermediate heat exchanger changes, and enables an appropriate operation in any operation mode. |
155 |
Air-conditioning apparatus |
US13394518 |
2009-09-18 |
US09279591B2 |
2016-03-08 |
Shigeo Takata; Koji Yamashita |
An air-conditioning apparatus includes a heat medium side device with plural pumps for circulating the heat medium related to the heating or the cooling of plural intermediate heat exchangers. Plural use side heat exchangers exchange heat between the heat medium and air. Plural flow path switching valves switch the flow path for supplying the heat medium related to a selected system among the heating media circulating in plural systems to each use side heat exchanger. A relay unit side control device controls the flow path switching valves so as to circulate the heat medium between the use side heat exchanger causing the heat medium to absorb the heat and the use side heat exchanger causing the heat medium to emit the preferentially set heat, when it is determined that it is impossible to perform the heating or the cooling of the heat medium by the intermediate heat exchanger. |
156 |
Heating and cooling system utilizing a water source heat pump and a swimming pool |
US14487674 |
2014-09-16 |
US09212835B1 |
2015-12-15 |
Gregg Berens |
A heating and cooling system includes a swimming pool, a pump connected to the swimming pool, a pool cooler connected to the pump so as to cool water passing from the pump, a water source heat pump cooperative with the pump so as to receive water as passed by the outlet pipe of the pump, a valve mechanism connected to the outlet of the pump so as to control the flow of water toward the pool cooler and the water source heat pump, and a pressure control valve cooperative between the valve mechanism in the inlet line of the pool cooler so as to limit a pressure of the water flowing from the valve mechanism toward the inlet line of the pool cooler. A pressure control is connected to the outlet line of the pool cooler so as to reduce a pressure of the water flowing from the outlet line to the pump. |
157 |
HEAT PUMP DEVICE |
US14428199 |
2012-10-05 |
US20150267941A1 |
2015-09-24 |
Yohei Kato |
A heat pump device that collects heat both from outdoor air and another heat source. When capacity is insufficient in a single operation, a controller determines whether to switch the single operation to a simultaneous operation by comparing a temperature of an additional heat source with a current refrigerant temperature. In a heating operation, the controller switches single operation to simultaneous operation when the temperature of the additional heat source is higher than the current refrigerant temperature, and continues the single operation when the temperature of the additional heat source is equal to or lower than the current refrigerant temperature. As another determination method, the controller estimates a refrigerant temperature after addition of a heat source, the controller switches single operation to simultaneous operation when estimated refrigerant temperature is higher than current refrigerant temperature, and continues single operation when the estimated refrigerant temperature is no greater than current refrigerant temperature. |
158 |
HEAT PUMP OF HEAT SOURCE TOWER FOR REALIZING SOLUTION REGENERATION AND HEAT REUTILIZATION BASED ON VACUUM BOILING |
US14432464 |
2013-11-15 |
US20150233616A1 |
2015-08-20 |
Caihua Liang; Hua Gao; Dongmei Jiang; Xiaosong Zhang |
The disclosure provides a heat source tower heat pump realizing solution regeneration and heat reutilization based on vacuum boiling. It comprises a refrigerant circuit, a solution circuit, a vacuum maintenance circuit, an air circuit, a regenerative solution heating circuit and a cold/hot water circuit. The unit provided by the disclosure regenerates a solution by taking full advantage of the characteristic that the boiling point of a solution will be reduced in vacuum, uses the heat released from the cooling of overheated refrigerant as the heat of solution regeneration and also uses the heat to produce heat supply hot water. While significantly raising the speed of solution regeneration, it also realizes efficient reutilization of solution regeneration heat, thoroughly solves the problem of solution regeneration of the heat pump of heat source tower system, improves the safety and reliability of the heat pump of heat source tower system in various operating conditions and realizes high overall efficiency of the system. |
159 |
Heat pump type water heating apparatus |
US13163393 |
2011-06-17 |
US09097444B2 |
2015-08-04 |
Donghyuk Lee; Jongchul Ha |
A heat pump type water heating apparatus is provided that includes a refrigeration cycle circuit having a first refrigerant and water heat exchanger to perform a heat exchange between a first refrigerant and water, and a first refrigerant and second refrigerant heat exchanger to perform a heat exchange between the first refrigerant and a second refrigerant. The heat pump type water heating apparatus may also include a cascade circuit having the first refrigerant and second refrigerant heat exchanger to operate jointly with the refrigeration cycle circuit, the cascade circuit also having a second refrigerant and water heat exchanger to perform a heat exchange between the second refrigerant and water, and a water heating channel connected to the first refrigerant and water heat exchanger and the second refrigerant and water heat exchanger so water passes through the first refrigerant and water heat exchanger and then through the second refrigerant and water heat exchanger. |
160 |
HEAT SOURCE SYSTEM CONTROL DEVICE |
US14430521 |
2013-05-15 |
US20150211762A1 |
2015-07-30 |
Tetsuyuki Kondo; Haruyuki Yamamori; Shunichi Kawamura |
A heat source system control device controls a heat source system and has a plurality of heat source units with capacities and/or the load characteristics that are different, a first header which aggregates hot/cold water supplied from the plurality of heat source units, and a header temperature sensor which measures the temperature of the hot/cold water aggregated by the first header. The heat source system control device includes a set temperature memory section storing a set temperature of the hot/cold water in the header, a header temperature detecting section detecting output values from the header temperature sensor, a coefficient of performance memory section storing coefficient of performance information, and a control section performing a control for improving efficiency on the plurality of heat source units based on the respective capacities and/or load characteristics and bringing the temperature of the hot/cold water close to the set temperature. |