Heat pump air-conditioning system and control method thereof

A heat pump air conditioner and control method technology, applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of poor practical operability, cumbersome structure, complex exhaust bypass flow control, etc., and achieve structure and control process Simple, meet the needs of life, improve the effect of comfort

Active Publication Date: 2013-11-06
MIDEA GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can also achieve non-reversing defrosting, and the indoor unit continues to supply heat, but the structure is cumbersome, and the flow control of the exhaust bypass is very complicated, and the practical operability is not strong.

Method used

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  • Heat pump air-conditioning system and control method thereof
  • Heat pump air-conditioning system and control method thereof
  • Heat pump air-conditioning system and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Please refer to Figure 1 to Figure 3 , is a heat pump air-conditioning system provided in Embodiment 1 of the present invention. The heat pump air-conditioning system includes a refrigerant circulation loop formed by connecting a compressor 1, a four-way valve 2, an indoor heat exchanger 3 and an outdoor heat exchanger 4 through pipelines; specifically Generally speaking, the four-way valve 2 has ports 2a, 2b, 2c, 2d, wherein, the port 2a is connected to the suction port of the compressor 1, the port 2b is connected to the indoor heat exchanger 3, and the port 2c is connected to the discharge port of the compressor 1. The air port is connected, and the interface 2d is connected to the outdoor heat exchanger 4, and the pipeline from the four-way valve 2 to the outdoor heat exchanger 4 is also connected in series with the refrigerant heater 5 and the first throttling device 61; while in the indoor heat exchange On the pipeline between the device 3 and the outdoor heat ex...

Embodiment 2

[0044] see Figure 4 to Figure 6 The difference between this embodiment and Embodiment 1 is that the control valve uses a three-way solenoid valve 72 instead of a two-way solenoid valve 71, and the connection is specifically: the first interface 721 of the three-way solenoid valve 72 is connected to the outdoor heat exchanger 4 , the second port 722 of the three-way solenoid valve 72 is connected to the bypass pipeline 7 , and the third port 723 of the three-way solenoid valve 72 is connected to the first throttling device 61 . In this embodiment, the controller can control the connection of different interfaces of the three-way solenoid valve 72 to realize the on-off of the bypass pipeline 7, so as to change the specific circuit of the refrigerant cycle and make the air-conditioning system in different operating modes.

[0045] See Figure 4 , when it is necessary to start the cooling operation of the heat pump air-conditioning system provided in Embodiment 2, the control me...

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Abstract

The invention provides a heat pump air-conditioning system and a control method thereof. The heat pump air-conditioning system comprises a refrigerant circulation loop formed by a compressor, a four-way valve, an indoor heat exchanger and an outdoor heat exchanger which are connected through a pipeline, wherein a refrigerant heater and a first throttling device are sequentially connected in series with the pipeline between the four-way valve and the outdoor heat exchanger; the pipeline between the indoor heat exchanger and the outdoor heat exchanger is connected in series with a second throttling device capable of adjusting flow; the refrigerant heater and the first throttling device are further connected in parallel with a by-pass pipeline; the by-pass pipeline is provided with a control valve used for controlling on-off of the by-pass pipeline; the heat pump air-conditioning system further comprises a controller used for controlling flow of the second throttling device and actions of the control valve as well as opening or closing of the refrigerant heater. According to the heat pump air-conditioning system and the control method thereof, which are provided by the invention, a refrigerant heating control process is utilized to realize the operation mode, including refrigeration, heating or non-reversing defrosting, of an air conditioner, and the indoor heat exchanger can continuously supply heat while defrosting is performed, so that comfort of a room is ensured.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning equipment, and more specifically relates to a heat pump air-conditioning system with a refrigerant heating function and a control method thereof. Background technique [0002] When the air conditioner of the heat pump air conditioning system (hereinafter referred to as the air conditioner) is used under low temperature conditions, after a period of operation, the heat exchanger of the external unit will frost, which increases the thermal resistance and wind resistance, which is not conducive to heat exchange. In order to make the air conditioner operate normally, it is often necessary to remove and melt the frost of the external unit. [0003] The main defrosting method of the existing air conditioner is to switch the four-way valve to carry out the refrigeration cycle. Although such a defrosting method can completely remove the frost on the heat exchanger, the indoor unit stops running ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B13/00F25B41/04F25B41/06F25B49/02F25B47/02F25B41/20F25B41/31
CPCY02B30/72Y02B30/70
Inventor 张浩
Owner MIDEA GRP CO LTD
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