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Refrigerating cycle device

A technology of circulation device and throttling device, which is applied in the direction of cooling fluid circulation device, household refrigeration device, irreversible cycle compressor, etc. It can solve the problems of catalyst activity reduction, corrosion of sensor components, detection sensor sensitivity drop, etc., to prolong life , the effect of environmental protection and safety

Inactive Publication Date: 2004-08-18
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, in the conventional sensor structure, once an organosilicon compound (hereinafter referred to as siloxane) used in lubricating oil etc. adheres to the gas detection sensor, SO is formed on the surface of the gas detection sensor. 2 Such as solid silicon oxide, because the surface of the catalyst is covered, the activity of the catalyst is reduced, and the sensitivity of the detection sensor is reduced.
On the other hand, once a sulfur compound such as hydrogen sulfide adheres to the gas detection sensor, it will poison the platinum-based catalyst, especially if the humidity is high, it will corrode the sensor components
Therefore, once the siloxane contained in the lubricating oil of the refrigeration cycle device, the sulfide contained in automobile emissions or natural substances adhere to the gas detection sensor, the sensitivity of the sensor will decrease, and there may be a possibility that the so-called detection of hydrocarbon refrigerants cannot be realized. of leakage thereby avoiding the intended role of the dangerous sensor

Method used

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Experimental program
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Effect test

Embodiment approach 1

[0021] Fig. 1 is a sectional view of a refrigerator according to an embodiment of the present invention. In FIG. 1, the refrigerator of the present invention uses silicone-free lubricating oil 20. Referring to FIG.

[0022] The operation of the refrigerator in the structure of the present invention will be described below.

[0023] Once the compressor 9 is operated by supplying power from the power outlet 14, the flammable hydrocarbon refrigerant 13 is ejected from the compressor 9, becomes high temperature and high pressure, and condenses and liquefies in the condenser 11 through heat exchange with outdoor air. Next, it becomes low temperature and low pressure in the throttling device 12 , exchanges heat with the refrigerator in the evaporator 8 , vaporizes, and then returns to the compressor 9 to repeat the refrigeration cycle to circulate the hydrocarbon refrigerant 13 . At this time, a little lubricating oil 20 in the compressor 9 also circulates together with the hydroca...

Embodiment approach 2

[0027] Fig. 2 is a cross-sectional view of a refrigerator according to Embodiment 2 of the present invention. In FIG. 2, the refrigerator of the present invention has detachable gas detection sensors 21 and 22 while using lubricating oil 20' containing silicone.

[0028] The operation of the refrigerator of the present embodiment is the same as that of the first embodiment.

[0029] According to the present embodiment, the hydrocarbon refrigerant 13 leaks from the refrigeration cycle, and the silicone-containing lubricating oil 20 ′ that becomes mist together with the hydrocarbon refrigerant 13 leaks near the gas detection sensors 21 and 22 and adheres to the gas. On the detection sensors 21 and 22, when gas detection cannot be performed in the future, new sensors can be replaced. Thereby, the refrigerator can be used safely again. In addition, when the sulfide floats near the gas detection sensors 21, 22 and corrodes the gas detection sensors 21, 22, making subsequent detec...

Embodiment approach 3

[0031] Fig. 3 is a cross-sectional view of a refrigerator according to Embodiment 3 of the present invention. The refrigerator of this embodiment has filters 23 and 24 for removing siloxane, and the filters 23 and 24 for removing siloxane are attached so as to cover the gas detection sensors 15 and 16 .

[0032] The operation of the refrigerator of the present embodiment is the same as that of the first embodiment.

[0033] In the refrigerator of the present embodiment, even if lubricating oil 20 ′ containing siloxane leaks near the gas detection sensors 15 and 16 , and adheres to the gas detection sensors 15 and 16 , it becomes misty with the hydrocarbon refrigerant 13 The gas detection sensor can also be protected by previously removing siloxane with filters 23 and 24 for removing siloxane. In addition, in the refrigerator of the present embodiment, if siloxane exists in the ambient atmosphere around the gas detection sensor due to not only leakage of the refrigerant from t...

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Abstract

A refrigerating cycle system of the present invention uses a hydrocarbon refrigerant, and lubricating oil that does not include silicone. Also, the refrigerating cycle system of the present invention includes a detachable sensor section which detects the leakage of the hydrocarbon refrigerant. Even when the gas detecting sensor becomes unusable, the refrigerating cycle system can be safely used by replacing the gas detecting sensor with new one. Further, the refrigerating cycle system of the present invention is provided with silicone removing filters or sulfur compound removing filters in the sensor section. Also, the refrigerating cycle system of the present invention is provided with one of infrared type, hydrogen flame ionization type, and optical interference type sensors. By using the refrigerating cycle system of the present invention, it is possible to provide an inexpensive refrigerating cycle system which is environment-friendly and excellent in safety.

Description

technical field [0001] The present invention relates to a refrigeration cycle apparatus using a gas detection sensor for detecting leakage of a flammable hydrocarbon refrigerant used in the refrigeration cycle apparatus. Background technique [0002] From the viewpoint of protecting the global environment, in recent years, refrigerants in refrigeration cycle devices such as refrigerators and air conditioners have used hydrocarbon refrigerants with zero ozone destruction coefficient and lower global warming coefficient compared with conventional refrigerants. However, there is a disadvantage of so-called flammability in hydrocarbon refrigerants. Therefore, there is proposed a refrigerating cycle apparatus having a safety device with respect to the flammability of the leaking refrigerant, which can detect the leakage of hydrocarbon refrigerant from the refrigerating cycle apparatus when hydrocarbon refrigerant is used in the refrigerating cycle apparatus. leak. [0003] For ...

Claims

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Application Information

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IPC IPC(8): F25B1/00F25B9/00F25B31/00F25B49/02F25D23/06
CPCC10N2240/30F25D2400/24F25D23/061F25B2400/12F25B9/002F25B31/002F25B2500/222C10N2040/30
Inventor 淡岛宏树
Owner PANASONIC CORP
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