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Heat pump air-conditioning system and control method for avoiding inner leakage of heat pump air-conditioning system

A heat pump air conditioner and control method technology, which is applied in the direction of heating mode, heating and ventilation control system, heating and ventilation safety system, etc., can solve problems such as heat exchanger entry, reduce losses, improve reliability, and prevent plate heat exchange The effect of endoleak

Active Publication Date: 2014-05-14
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a heat pump air-conditioning system and a control method for preventing internal leakage of the system, so as to solve the technical problem of preventing water from entering other parts of other units after the heat exchanger freezes and cracks

Method used

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  • Heat pump air-conditioning system and control method for avoiding inner leakage of heat pump air-conditioning system

Examples

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Effect test

no. 1 example

[0026] According to the first embodiment of the present invention: when the unit is running, the first valve 10 and the second valve 20 are opened, and the anti-freeze and anti-leakage protection can be realized by comparing the pressure of the refrigerant detected by the first pressure sensor 10 with the saturation pressure of the refrigeration system. When the pressure of the first pressure sensor 10 is lower than 0.703MPa within 3~10S (the pressure shown on the pressure gauge, taking R410A refrigerant as an example, the corresponding evaporation temperature is the saturation pressure at 0°C), the compressor 90 stops, and the first The valve 10 and the second valve 20 are closed, which can effectively prevent the evaporator 60 from freezing and cracking. The unit enters the antifreeze protection state and a fault alarm is issued at the same time. The first valve 10 and the second valve 20 are closed, which cuts off the cooling of the heat exchanger 60 and the entire system ag...

no. 3 example

[0031] According to the third embodiment of the present invention: after the unit shuts down, regardless of normal shutdown or failure shutdown, the first valve 10 and the second valve 20 are closed, which can effectively prevent water from invading other parts of the unit due to freezing of the heat exchanger caused by forgetting to release water in winter , to reduce user loss.

[0032] Start-up condition / recovery condition: pressure detected by the first pressure sensor≥saturation pressure>pressure detected by the second pressure sensor and the water temperature is greater than 0°C, the first valve 10 and the second valve 20 are opened, and then the compressor 90 is turned on.

[0033] From the above description, it can be seen that the above-mentioned embodiments of the present invention have achieved the following technical effects:

[0034] In this application, a valve is installed on the inlet and outlet pipelines of the refrigerant side of the heat exchanger and a refr...

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Abstract

The invention provides a heat pump air-conditioning system and a control method for avoiding inner leakage of the heat pump air-conditioning system. The heat pump air-conditioning system comprises a compressor, a plate type heat exchanger communicated with the air suction inlet of the compressor through a refrigerant pipe, a first valve connected to a refrigerant inlet pipe of the heat exchanger, a second valve connected to a refrigerant outlet pipe of the heat exchanger, a first pressure sensor arranged between the first valve and the refrigerant inlet of the heat exchanger, and a controller which can transmit control signals to control the on and off of the compressor, the first valve and the second valve according to the comparing result of the sensed pressure of the first pressure sensor and the saturation pressure of refrigerant. By controlling the on and off of the two valves, the inner leakage of the plate type heat exchanger can be effectively avoided and further corrosion of cooling water to other parts due to the inner leakage can be avoided, so that the losses due to inner leakage of the heat exchanger can be reduced.

Description

technical field [0001] The invention relates to the field of air conditioning, in particular to a heat pump air conditioning system and a control method for preventing internal leakage of the system. Background technique [0002] In the prior art, there are two cases of internal leakage in the water-fluorine heat exchanger: one is freezing and cracking due to too low evaporation temperature; the other is leakage due to corrosion, and the proportion of freezing cracks is much greater than that of corrosion. The first reason for freezing cracks is that when the heat exchanger is used as an evaporator, the evaporation temperature of the refrigerant is lower than the freezing temperature of the secondary fluid (water side), the secondary fluid freezes, the flow channel is deformed and the heat exchanger is cracked; the other is freezing cracks The reason is that the heat exchanger forgets to release water in winter, and the temperature of the heat exchanger is lower than the fre...

Claims

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Application Information

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IPC IPC(8): F24F11/02
Inventor 黄春宋培刚刘煜傅英胜陈泽彬麦志炜
Owner GREE ELECTRIC APPLIANCES INC
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