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Novel environment-friendly refrigerant

A refrigerant and environmental protection technology, applied in the field of refrigerant, can solve the problems of insufficient leakage, low cooling effect, unsuitable use, etc., and achieve the effect of protecting people's property safety

Inactive Publication Date: 2011-10-19
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the nature of isobutane R600a, it is not suitable for use in the air-conditioning refrigeration cycle. The refrigerant provided by the patent is applied, and its refrigeration effect is low, and tetrahydrothiophene THT is slightly soluble in isobutane R600a, so that once leakage occurs When the leakage of tetrahydrothiophene is less, it is very likely that due to insufficient leakage, it cannot play the role of warning users

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In the first embodiment of the present invention, the refrigerant provided is composed of 99.5% by mass propane R290 and 0.5% tetrahydrothiophene THT.

[0024] Before mixing the refrigerant, it is necessary to master the volatilization characteristics of tetrahydrothiophene (THT). In a closed environment at a temperature of 20°C, take 1g and 2g of THT with a medical syringe and drop them on a hard metal plate to observe the volatilization. , and record the experimental conclusion that it takes 10 minutes for 1g of tetrahydrothiophene to completely volatilize, and it takes 46 minutes for 2g of tetrahydrothiophene to completely volatilize.

[0025] First fill the vacuum tank with 199g of R290, then use a medical syringe to fill the tank with 1g of tetrahydrothiophene, wait for natural mixing for more than 30 minutes, and open the bottle to smell the odor, which proves that it has been fully mixed.

[0026] Then use the same model to charge the new refrigerant into the air...

Embodiment 2

[0032] The novel refrigerant provided by the second embodiment of the present invention is prepared from 95% by mass of propane and 5% of tetrahydrothiophene.

[0033] With the novel refrigerant of the second embodiment of the present invention, its refrigerating capacity is slightly reduced, and a strong odor can still be smelled in its leakage test.

Embodiment 3

[0035] The third embodiment of the present invention provides a new type of refrigerant, which is composed of 99.7% propane and 0.3% tetrahydrothiophene.

[0036] Using the novel refrigerant of the third embodiment of the present invention, its refrigerating capacity is quite similar to that of the first embodiment, but in the leakage test, the human body can only feel a relatively light odor at a distance of 5m.

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Abstract

The invention provides a novel environment-friendly refrigerant, which comprises 95 to 99.7 mass percent of propane 290 and 0.3 to 5 mass percent of tetrahydrothiophene (THT). The refrigeration efficiency of the novel environment-friendly refrigerant is almost the same as that of R22, but the novel environment-friendly refrigerant does not cause damage to ozone layer and has a very low greenhouse effect index. When an air conditioning system using the refrigerant leaks, a user can sense the leakage immediately so as to take measures in time; and thus, the property safety of people is protected.

Description

technical field [0001] The invention relates to a refrigerant, in particular to an environmentally friendly refrigerant that can replace R22. Background technique [0002] Since freon refrigerants (such as R22, which are widely used now) have a destructive effect on the atmospheric ozone layer and have a strong greenhouse effect, they are refrigerants that need to be replaced, while some natural refrigerants such as R600a (isobutane) and R290 (propane) The natural compounds present in the refrigerant will neither destroy the atmospheric ozone layer nor cause global warming, and are completely environmentally friendly refrigerants. These refrigerants are being studied and used in refrigeration systems. For example, R600a is considered to be a refrigerant used in low-temperature applications (such as refrigerators), while R290 is considered to be used in air-conditioning systems to replace the currently widely used refrigerants. R22 refrigerant. However, R290 is a flammable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04
CPCC09K5/042C09K2205/134
Inventor 刘知新赵永清郭春晖许晨寇俊岐徐永恩刘明
Owner GREE ELECTRIC APPLIANCES INC
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