摘要:
When a refrigerant amount balance control is executed, in indoor units (5a) and (5b) where the refrigerant supercooling degree is lower than an average refrigerant supercooling degree, the refrigerant pressure on a downstream side of indoor expansion valves (52a) and (52b) decreases since the degrees of opening of the indoor expansion valves (52a) and (52b) are decreased. On the other hand, in an indoor unit (5c) where the refrigerant supercooling degree is higher than the average refrigerant supercooling degree, although the degrees of opening of the indoor expansion valves (52a) and (52b) are made high, the refrigerant pressure on the downstream side of the indoor expansion valves (52a) and (52b) decreases and this decreases the refrigerant pressure on the downstream side of the indoor expansion valve (52c), so that the difference in pressure between on the upstream side and on the downstream side of the indoor expansion valve (52c) increases and the liquid refrigerant staying at an indoor heat exchanger (51c) of the indoor unit (5c) consequently flows out into a liquid pipe (8). Thereby, the heating ability of the indoor unit (5c) increases.
摘要:
An air heating, air conditioning and water heating system includes a multi-communicative valve unit, a compressor arranged for compressing the refrigerant in a state of superheated vapor, a condenser communicated with the compressor through the multi-communicative valve unit, a heat exchanger communicated with the condenser through the multi-communicative valve unit, an expansion valve, and a water heater communicated with the heat exchanger and the compressor through the multi-communicative valve unit, wherein the multi-communicative valve unit is arranged to be operated to selectively establish at least an air conditioning route, an air heating route, and a water heating route for the refrigerant so that the air heating, air conditioning and water heating system is capable of selectively providing air conditioning, heating and delivering hot water for a predetermined premises.
摘要:
When a refrigerant amount balance control is executed, in indoor units (5a) and (5b) where the refrigerant supercooling degree is lower than an average refrigerant supercooling degree, the refrigerant pressure on a downstream side of indoor expansion valves (52a) and (52b) decreases since the degrees of opening of the indoor expansion valves (52a) and (52b) are decreased. On the other hand, in an indoor unit (5c) where the refrigerant supercooling degree is higher than the average refrigerant supercooling degree, although the degrees of opening of the indoor expansion valves (52a) and (52b) are made high, the refrigerant pressure on the downstream side of the indoor expansion valves (52a) and (52b) decreases and this decreases the refrigerant pressure on the downstream side of the indoor expansion valve (52c), so that the difference in pressure between on the upstream side and on the downstream side of the indoor expansion valve (52c) increases and the liquid refrigerant staying at an indoor heat exchanger (51c) of the indoor unit (5c) consequently flows out into a liquid pipe (8). Thereby, the heating ability of the indoor unit (5c) increases.
摘要:
In a vehicular air conditioner in which a cooling operation and a heating operation are switched by switching a four-way valve, a pressure accumulator is provided in which a coolant, which is related to a discharge pressure or an aspiration pressure of a compressor , is accumulated when the compressor is operated, and a differential pressure, which is required for switching the four-way valve, between piston rooms is maintained, and the differential pressure, which is required for switching the four-way valve, is generated between the piston rooms of the four-way valve even after the compressor is stopped.
摘要:
The refrigerant discharged from a compressor (21) is distributed based on the priorities set by the user in advance and the remaining refrigerant is further distributed based on the priorities. Thus, setting the priorities for indoor units (30A to 30C, 40) according, for example, to the usage of work spaces and the like in an office building, the user can operate a heat pump system (10) efficiently in accordance with the intended use. Furthermore, the remaining capacity of the outdoor unit is distribute to the remaining indoor units according to their priorities so that the indoor units are operated efficiently within the range of the cooling capacity of the outdoor unit.
摘要:
A hot water generator of the present invention includes: a refrigerant circuit 2 formed by annularly connecting, through a refrigerant pipe to one another, a compressor 21, flow path switching means 26, a radiator 22, a decompressor 23 and an evaporator 24; a bypass passage 3, an opening and closing device 31, and a control device 4, the plurality of operation modes include a reversed cycle defrosting operation mode for closing the opening and closing device 31, and a normal cycle defrosting operation mode for opening the opening and closing device 31, and when temperature of the radiator 22 becomes lower than predetermined temperature during the reversed cycle operation mode, the control device 4 shifts the operation mode to the normal cycle defrosting operation mode. Therefore, it is possible to efficiently carry out a defrosting operation while preventing water flowing through the radiator 22 from freezing.
摘要:
The refrigerant discharged from a compressor (21) is distributed based on the priorities set by the user in advance and the remaining refrigerant is further distributed based on the priorities. Thus, setting the priorities for indoor units (30A to 30C, 40) according, for example, to the usage of work spaces and the like in an office building, the user can operate a heat pump system (10) efficiently in accordance with the intended use. Furthermore, the remaining capacity of the outdoor unit is distribute to the remaining indoor units according to their priorities so that the indoor units are operated efficiently within the range of the cooling capacity of the outdoor unit.
摘要:
A triple-pipeline type first outdoor unit 2 provided with a first compressor 20 and a first outdoor heat exchanger 21 and connected to three inter-unit pipelines 5 made up of a high-pressure gas pipe 7, a low-pressure gas pipe 6, and a fluid pipe 8 and a plurality of indoor units 4A to 4D are provided, a second outdoor unit 3 provided with a second compressor 30, a second outdoor heat exchanger 32, and a second expansion valve 33 and connected by two pipelines of a gas pipe 35 and a fluid pipe 36 and a valve-element kit 50 having a third four-way valve 51 that connects the fluid pipe 36 of the second outdoor unit 3 to the fluid pipe 8 of the inter-unit pipeline 5 and selectively connects the gas pipe 35 of the second outdoor unit 3 to the high-pressure gas pipe 7 or the low-pressure gas pipe 6 of the inter-unit pipeline 5 are provided, and the first outdoor unit 2 is provided with a first four-way valve 60 that makes a refrigerant discharge pipe 25 of the first compressor 20 and the high-pressure gas pipe 7 capable of communicating with each other and if all the indoor units 4A to 4D perform a cooling operation at the same time, the first four-way valve 60 shuts off the communication between the refrigerant discharge pipe 25 and the high-pressure gas pipe 7, while a third four-way valve 51 is switched so as to connect the gas pipe 35d to the high-pressure gas pipe 7.