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Air conditioner using combustible refrigerant and control method thereof

An air conditioner and refrigerant technology, applied in air conditioning systems, heating and ventilation control systems, applications, etc., can solve problems such as explosions and achieve the effect of reducing leakage

Active Publication Date: 2010-06-16
MIDEA GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although natural refrigerants have good environmental performance, they are generally flammable gases, such as propane, butane, etc. When refrigerants are used in household air conditioners, the biggest risk is that the refrigerant refrigerants leaked into the room Within a certain concentration range, it is flammable, and because there are often many household appliances in the room, there is a risk of igniting flammable gases, and there may even be a risk of explosion in a closed indoor space

Method used

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  • Air conditioner using combustible refrigerant and control method thereof
  • Air conditioner using combustible refrigerant and control method thereof
  • Air conditioner using combustible refrigerant and control method thereof

Examples

Experimental program
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Effect test

no. 1 example

[0027] see figure 1 In the figure, the compressor 1, the four-way valve 2, the indoor heat exchanger 3, the throttling component 4, and the outdoor heat exchanger 5 form a basic refrigeration / heat pump air-conditioning system. figure 1 Similar to the system shown in , the techniques disclosed in this invention can also be employed. The working medium used in this embodiment is R290. Taking the indoor mechanical heating condition as an example, the high-pressure and high-temperature gaseous working medium is discharged from the compressor 1, and is discharged into the indoor heat exchanger 3 through the four-way valve 2 to condense and dissipate heat indoors. The condensed liquid is throttled by the throttling part 4. In this embodiment, the throttling part 4 is a capillary tube. After the low-pressure liquid refrigerant evaporates and absorbs heat in the outdoor unit heat exchanger 5, the low-pressure refrigerant refrigerant The gas returns to the suction port of compressor 1...

no. 2 example

[0041] see figure 2, the difference from Embodiment 1 is that an automatic on-off valve 9 and an indoor unit-side pressure sensor 13 are connected to the pipeline between the compressor 1 and the indoor heat exchanger 3 . The throttling part 4 adopts an electronic expansion valve with a complete shut-off function, or a combination of a two-way valve and a capillary tube. The automatic drain valve 7 adopts a valve with a regulating function, which can have a certain throttling function, control the discharge volume, and avoid A high concentration of refrigerant gas is locally generated. The discharge pipe branch 19 is arranged on the pipeline between the four-way valve 2 and the outdoor heat exchanger 5 . In this embodiment, the discharge pipe branch 19 is arranged on the side of the gaseous working medium, so that the discharged working medium is mainly in the form of gaseous working medium, and the discharge time is relatively long. concentration. In this embodiment, the ...

no. 3 example

[0051] see image 3 , The difference from Embodiment 1 is that the refrigerant outlet 8 is arranged on the windward side of the fan of the outdoor unit, and the motor used by the outdoor fan is an explosion-proof motor (not shown in the figure).

[0052] The leakage emergency treatment mode of this embodiment is basically the same as that of Embodiment 1. The main steps are to send a refrigerant leakage alarm to the air conditioner after entering the refrigerant leakage emergency treatment mode; stop the air conditioner compressor; and stop the operation of the indoor unit. The difference from Embodiment 1 lies in that the fan of the outdoor unit is in an on state. Since the refrigerant working medium outlet 8 is arranged on the windward side of the outdoor unit fan, the air supply volume can be enlarged to fully dilute the refrigerant concentration by turning on the outdoor fan, and a large amount of outdoor fresh air 17 becomes a mixed refrigerant after passing through the r...

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Abstract

The invention relates to an air conditioner using a combustible refrigerant and a control method thereof. The air conditioner comprises a refrigeration / heat pump air conditioner system which consists of a compressor, a four-way valve, an indoor heat exchanger, a throttle mechanism, and an outdoor heat exchanger, wherein two ends of the indoor heat exchanger are provided with an air conditioner connecting pipe pneumatic valve and an air conditioner connecting pipe hydraulic valve respectively; a refrigerant working medium concentration sensor is arranged indoors; a drain pipe branch and an automatic drain valve of the drain pipe branch are arranged on the connecting pipes of the outdoor heat exchanger; the refrigerant working medium concentration sensor is arranged beside the indoor heat exchanger; and the drain pipe branch and the automatic drain valve of the drain pipe branch are arranged on the pipes between the throttle mechanism and the outdoor heat exchanger. The air conditioner using the combustible refrigerant is provided with the refrigerant working medium concentration sensor, the drain pipe branch, and the automatic drain valve of the drain pipe branch, and when the combustible refrigerant working medium is detected to be leaked, an outdoor machine part exhausts the refrigerant to the large outdoor space to reduce the indoor leakage quantity, so personal injury and property loss generated when the indoor combustible working medium concentration reaches the combustion limit are avoided.

Description

technical field [0001] The present invention relates to an air conditioner using a flammable fluid as a refrigerant and a control method thereof, and more particularly to HC-based (hydrocarbon-based) refrigeration using a flammable refrigerant, especially such as propane, isobutane and the like agent air conditioner. Background technique [0002] In recent years, hydrofluorocarbon HFC refrigerants have been used to replace fluorochloroalkyl HCFC refrigerants, but HFC-based refrigerants have a nature of promoting global warming. Therefore, people began research using HC-based refrigerants, which do not destroy the ozone layer or drastically affect global warming. However, since HC-based refrigerants are flammable, it is necessary to prevent explosion or ignition in order to ensure safety. [0003] Although natural refrigerants have good environmental performance, they are generally flammable gases, such as propane, butane, etc. When refrigerants are used in household air co...

Claims

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Application Information

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IPC IPC(8): F24F3/00F24F13/30F24F11/00
Inventor 刘智勇刘阳
Owner MIDEA GRP CO LTD
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