IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0884048
(2006-02-08)
|
등록번호 |
US-7730729
(2010-06-29)
|
우선권정보 |
JP-2005-035225(2005-02-10) |
국제출원번호 |
PCT/JP2006/302176
(2006-02-08)
|
§371/§102 date |
20070809
(20070809)
|
국제공개번호 |
WO06/085557
(2006-08-17)
|
발명자
/ 주소 |
- Yakumaru, Yuuichi
- Saito, Tetsuya
- Tamura, Tomoichiro
- Honma, Masaya
|
출원인 / 주소 |
|
대리인 / 주소 |
Wenderoth, Lind & Ponack, L.L.P.
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
7 |
초록
▼
A compressor, a radiator, an expander, and an evaporator are connected in series to define a refrigerating cycle. A bypass circuit that bypasses the expander, an on-off valve disposed in the bypass circuit, and a controller C1 for controlling an opening of the on-off valve are provided in the refrig
A compressor, a radiator, an expander, and an evaporator are connected in series to define a refrigerating cycle. A bypass circuit that bypasses the expander, an on-off valve disposed in the bypass circuit, and a controller C1 for controlling an opening of the on-off valve are provided in the refrigerating cycle. During defrosting, the controller C1 controls the on-off valve so that a refrigerant may flow through the bypass circuit, thereby avoiding reduction in the amount of flow of the refrigerant during defrosting and preventing the defrosting operation from being prolonged.
대표청구항
▼
The invention claimed is: 1. A refrigerating machine comprising; a compressor, a first heat-exchanger, an expander, and a second heat-exchanger, all connected in series to define a refrigerating cycle; a generator connected to the expander; a bypass circuit that bypasses the expander; a refrigerant
The invention claimed is: 1. A refrigerating machine comprising; a compressor, a first heat-exchanger, an expander, and a second heat-exchanger, all connected in series to define a refrigerating cycle; a generator connected to the expander; a bypass circuit that bypasses the expander; a refrigerant regulator disposed in the bypass circuit; and a controller operable to control an opening of the refrigerant regulator; wherein during defrosting, the controller controls the refrigerant regulator to open it to thereby flow a refrigerant through the bypass circuit, and also controls a speed of the expander to a predetermined value with the generator used as a motor to thereby increase an amount of refrigerant in the refrigerating cycle. 2. The refrigerating machine according to claim 1, wherein the controller comprises a timer that counts a time period from start of the compressor, and after a lapse of a predetermined time period from the start of the compressor, the controller controls the refrigerant regulator to close it to thereby block the refrigerant flowing through the bypass circuit. 3. The refrigerating machine according to claim 1, further comprising a first pressure sensor operable to detect a pressure of the refrigerating cycle from a discharge side of the compressor to the expander, wherein when the first pressure sensor detects a pressure greater than a predetermined value, the controller controls the refrigerant regulator to close it to thereby block the refrigerant flowing through the bypass circuit. 4. The refrigerating machine according to claim 1, further comprising a first pressure sensor operable to detect a pressure of the refrigerating cycle from a discharge side of the compressor to the expander and a second pressure sensor operable to detect a pressure of the refrigerating cycle from an outlet of the expander to a suction side of the compressor, wherein when a pressure difference between the pressure detected by the first pressure sensor and the pressure detected by the second pressure sensor becomes greater than a predetermined value, the controller controls the refrigerant regulator to close it to thereby block the refrigerant flowing through the bypass circuit. 5. The refrigerating machine according to claim 1, further comprising a temperature sensor operable to detect a temperature of the refrigerating cycle from a discharge side of the compressor to an inlet of the first heat-exchanger, wherein when the temperature sensor detects a temperature greater than a predetermined value, the controller controls the refrigerant regulator to close it to thereby block the refrigerant flowing through the bypass circuit. 6. The refrigerating machine according to claim 1, wherein the refrigerant regulator comprises a throttling device having a varying opening, and the controller controls the opening of the throttling device to reduce the amount of refrigerant flowing through the bypass circuit. 7. The refrigerating machine according to claim 1, wherein the first heat-exchanger comprises a water refrigerant heat-exchanger, and the second heat-exchanger comprises an evaporator. 8. The refrigerating machine according to claim 1, wherein the first heat-exchanger comprises an indoor heat-exchanger, and the second heat-exchanger comprises an outdoor heat-exchanger. 9. The refrigerating machine according to claim 1, wherein a refrigerant that can hold a pressure on a high-pressure side of the refrigerating cycle in a supercritical state is used.
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