IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0190589
(2002-07-09)
|
우선권정보 |
JP-0066077 (1997-03-19) |
발명자
/ 주소 |
- Sakurai, Takashi
- Takemoto, Hideo
|
출원인 / 주소 |
|
대리인 / 주소 |
Antonelli, Terry, Stout & Kraus, LLP
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
9 |
초록
▼
In a refrigerating apparatus using an HFC group refrigerant, the performance is improved by increasing the refrigerating capacity and a stable operation is made possible. In order to achieve this, a cycle system in a refrigerator is structured so as to connect a compressor, a condenser, a liquid rec
In a refrigerating apparatus using an HFC group refrigerant, the performance is improved by increasing the refrigerating capacity and a stable operation is made possible. In order to achieve this, a cycle system in a refrigerator is structured so as to connect a compressor, a condenser, a liquid receiver and a supercooler in this order. In an air-cooled separation type refrigerator, the liquid receiver is disposed within an air-cooled type condenser unit. Further, in the case where a flush gas is liable to be generated in a liquid pipe, a vapor-liquid separator is disposed within the compressor unit integral with an accumulator and separated therefrom by a partition plate.
대표청구항
▼
In a refrigerating apparatus using an HFC group refrigerant, the performance is improved by increasing the refrigerating capacity and a stable operation is made possible. In order to achieve this, a cycle system in a refrigerator is structured so as to connect a compressor, a condenser, a liquid rec
In a refrigerating apparatus using an HFC group refrigerant, the performance is improved by increasing the refrigerating capacity and a stable operation is made possible. In order to achieve this, a cycle system in a refrigerator is structured so as to connect a compressor, a condenser, a liquid receiver and a supercooler in this order. In an air-cooled separation type refrigerator, the liquid receiver is disposed within an air-cooled type condenser unit. Further, in the case where a flush gas is liable to be generated in a liquid pipe, a vapor-liquid separator is disposed within the compressor unit integral with an accumulator and separated therefrom by a partition plate. 1. An air conditioner, comprising a compressor, an expansion valve, an outdoor heat exchanger, and an indoor heat exchanger connected to each other by a refrigerant pipe, said refrigerant pipe being sectioned into a high pressure section extending from an outlet port of the compressor to an inlet port of the expansion valve, and a low pressure section extending from an outlet port of the expansion valve to an inlet port of the compressor, the air conditioner comprising: a pressure sensor provided on the refrigerant pipe within said low pressure section; and a control unit detecting a refrigerant leakage in the low pressure section by comparing a variation in refrigerant pressure sensed by the pressure sensor with a preset variation in refrigerant pressure in accordance with a normal operation associated with no refrigerant leakage, during a refrigerant leakage detection mode. 2. The air conditioner according to claim 1, wherein said control unit determines that the refrigerant leakage in the low pressure section occurred, when the variation in refrigerant pressure sensed by the pressure sensor is less than the preset variation in refrigerant pressure in accordance with the normal operation, during the refrigerant leakage detection mode. 3. The air conditioner according to claim 1, further comprising: a four-way valve, the four way valve being provided on the refrigerant pipe controlling a refrigerant flowing direction in the refrigerant pipe, a section of the refrigerant pipe between the outlet port of the compressor and the four-way valve is fixed to a high pressure section in which refrigerant maintains high pressure during an operation of the air conditioner, a second section of the refrigerant pipe between the four-way valve and the inlet port of the compressor is fixed to a low pressure section in which the refrigerant maintains low pressure during the operation of the air conditioner, a remaining section of the refrigerant pipe is switched between the high pressure section and the low pressure section in accordance with the refrigerant flowing direction in the refrigerant pipe, and said pressure sensor is provided within said section fixed to the low pressure section. 4. The air conditioner according to claim 3, wherein said control unit detects the refrigerant leakage in the low pressure section while switching the high pressure section and the low pressure section, during the refrigerant leakage detection mode. 5. An air conditioner, comprising: a compressor, an outdoor heat exchanger; a n indoor heat exchanger; an indoor expansion valve; an outdoor expansion valve; and a four-way valve controlling a refrigerant flowing direction, which are connected to each other by a refrigerant pipe, wherein said refrigerant pipe includes a first detecting section extending from the indoor expansion valve to an inlet port of the compressor while passing through the indoor heat exchanger and the four-way valve, a second detecting section extending from the outdoor expansion valve to the inlet port of the compressor while passing through the outdoor heat exchanger and the four-way valve, and a third detecting section extending from the indoor expansion valve to the inlet port of the compressor while passing through the outdoor expansion valve, the outdoor heat exchanger and the four-way valve; a pressure sensor is provided on the refrigerant pipe at a position between the four-way valve and the inlet port of the compressor; and a control unit is provided to detect a refrigerant leakage in each of the first, second and third detecting sections by comparing a variation in refrigerant pressure of each section sensed by said pressure sensor with a preset variation in the refrigerant pressure in accordance with a normal operation of each of the sections associated with no refrigerant leakage, during a refrigerant leakage detection mode. 6. The air conditioner according to claim 5, wherein said control unit determin
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