IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0519396
(2015-07-02)
|
등록번호 |
US-10060654
(2018-08-28)
|
우선권정보 |
JP-2014-211969 (2014-10-16) |
국제출원번호 |
PCT/JP2015/069188
(2015-07-02)
|
국제공개번호 |
WO2016/059837
(2016-04-21)
|
발명자
/ 주소 |
- Takayama, Yasunori
- Ishida, Hiroshi
- Sakai, Masato
- Negishi, Yoichi
|
출원인 / 주소 |
- SANDEN HOLDINGS CORPORATION
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
4 |
초록
▼
Heat pump type heating apparatus capable of performing a continuous dual-stage operation without stopping a high stage side compressor even when a return temperature of a heating medium reaches a prescribed high temperature and, thereby, improving a sense of being insufficiently warmed due to stoppa
Heat pump type heating apparatus capable of performing a continuous dual-stage operation without stopping a high stage side compressor even when a return temperature of a heating medium reaches a prescribed high temperature and, thereby, improving a sense of being insufficiently warmed due to stoppage of the high stage side compressor or a sense of being insufficiently warmed due to execution of frequent defrosting operations. The heat pump type heating apparatus includes an internal heat exchanger (a second internal heat exchanger) that performs heat exchange between a low-temperature refrigerant on a low-pressure side of a low stage side refrigeration circuit and a high-temperature refrigerant on a high-pressure side of a high stage side refrigerant circuit, a bypass pipe bypassing the internal heat exchanger, and flow path control means that controls a refrigerant flow to each of the internal heat exchanger and the bypass pipe.
대표청구항
▼
1. A heat pump type heating apparatus characterized by comprising: a dual-stage heat pump unit including a low stage side refrigeration circuit formed by annularly connecting, in order, a low stage side compressor, a low stage side heating medium-refrigerant heat exchanger, a cascade heat exchanger,
1. A heat pump type heating apparatus characterized by comprising: a dual-stage heat pump unit including a low stage side refrigeration circuit formed by annularly connecting, in order, a low stage side compressor, a low stage side heating medium-refrigerant heat exchanger, a cascade heat exchanger, low stage side decompressing means, and an evaporator, so as to circulate a refrigerant therethrough, anda high stage side refrigeration circuit formed by annularly connecting, in order, a high stage side compressor, a high stage side heating medium-refrigerant heat exchanger, high stage side decompressing means, and the cascade heat exchanger, so as to circulate a refrigerant therethrough; anda heating unit having a heating medium circuit including a circulation pump, a heating terminal, the low stage side heating medium-refrigerant heat exchanger, and the high stage side heating medium-refrigerant heat exchanger, so as to circulate a heating medium therethrough, whereinthe heat pump type heating apparatus further includes an internal heat exchanger that performs heat exchange between a low-temperature refrigerant on a low-pressure side of the low stage side refrigeration circuit and a high-temperature refrigerant on a high-pressure side of the high stage side refrigeration circuit,a bypass pipe bypassing the internal heat exchanger, andflow path control means that controls a refrigerant flow to each of the internal heat exchanger and the bypass pipe. 2. The heat pump type heating apparatus according to claim 1, wherein the bypass pipe is provided between a refrigerant flowout side of the high stage side heating medium-refrigerant heat exchanger and a refrigerant inflow side of the high stage side decompressing means in the high stage side refrigeration circuit, or between a refrigerant flowout side of the evaporator and a refrigerant suction side of the low stage side compressor in the low stage side refrigeration circuit. 3. The heat pump type heating apparatus according to claim 1, wherein when, in a dual-stage operation in which the low stage side compressor and the high stage side compressor are operated, a return temperature of a heating medium flowed out of the heating terminal is equal to or higher than a prescribed high-temperature threshold, the flow path control means performs high stage side refrigerant cooling control of causing a refrigerant on the low-pressure side of the low stage side refrigeration circuit or a refrigerant on the high-pressure side of the high stage side refrigeration circuit to flow into the internal heat exchanger side. 4. The heat pump type heating apparatus according to claim 3, wherein the flow path control means performs the high stage side refrigerant cooling control when the outside air temperature is equal to or lower than a prescribed high stage side cooling operation upper limit temperature. 5. The heat pump type heating apparatus according to claim 3, wherein the flow path control means performs the high stage side refrigerant cooling control when the outside air temperature is within a prescribed frequent defrosting operation temperature range.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.