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Heat pump type air conditioner refrigeration cycle system and control method thereof

A technology for circulation systems and air conditioners, applied in air conditioning systems, heating and ventilation control systems, refrigerators, etc., can solve the problems of long defrosting time, affecting indoor thermal comfort, etc., to improve energy efficiency, slow down frost formation, improve heat absorption effect

Pending Publication Date: 2021-12-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the most widely used reverse cycle defrosting method has problems such as affecting indoor thermal comfort and long defrosting time.

Method used

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  • Heat pump type air conditioner refrigeration cycle system and control method thereof
  • Heat pump type air conditioner refrigeration cycle system and control method thereof

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] like figure 1 As shown, the embodiment of the present invention provides a heat pump type air conditioner refrigeration cycle system, including a liquid accumulator 101, a compressor 102, a four-way reversing valve 103, an indoor heat exchanger 104, a flash evaporator 105, a first electronic expansion Valve 106 , subcooler 107 , second electronic expansion valve 108 , third electronic expansion valve 109 , outdoor-side heat exchanger 110 , controller 111 , indoor temperature sensor 112 , and defrosting temperature sensor 113 . Wherein, the liquid accumulator 101, the compressor 102, the four-way reversing valve 103, the flash evaporator 105, the subcooler 107, the second electronic expansion valve 108, the third electronic expansion valve 109 and the outdoor heat exchanger 110 are located on the outdoor side; The indoor heat exchanger ...

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Abstract

The invention discloses a heat pump type air conditioner refrigeration cycle system and a control method thereof. The system comprises an indoor side heat exchanger and an outdoor side heat exchanger, the outdoor side is further provided with a flash evaporator and a subcooler, the gas outlet end of the flash evaporator is sequentially connected with the subcooler and the outdoor side heat exchanger, the liquid outlet end of the flash evaporator is further connected with the indoor side heat exchanger and the outdoor side heat exchanger, the indoor side heat exchanger and the outdoor side heat exchanger are connected to a liquid storage device circulating pipeline through a four-way reversing valve, and a liquid storage device and a compressor are arranged on the liquid storage device circulating pipeline. According to the control method, control is correspondingly carried out according to whether the system is in a refrigeration mode, a heating mode or a defrosting mode. The energy efficiency of the heat pump type air conditioner refrigeration cycle system can be effectively improved, frosting of the outdoor heat exchanger in the heating mode can be restrained or slowed down, meanwhile, supercooling of the high-pressure side liquid refrigerant in the refrigeration mode can be achieved, and the refrigerating capacity of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of refrigeration and air conditioning, and in particular relates to a heat pump type air conditioner refrigeration cycle system and a control method thereof. Background technique [0002] The heat pump air conditioner is an energy-saving and environmentally friendly heating and cooling equipment, and it is also a device that consumes electric energy to make heat flow from a low-temperature heat source to a high-temperature heat source. Although the heat pump air conditioner consumes a certain amount of electric energy, the heat provided is the sum of the consumed electric energy and the low-temperature heat absorbed. Therefore, the use of heat pump air conditioners can achieve the purpose of energy saving. However, when the heat pump air conditioner is heating in winter, due to the low outdoor temperature, the evaporation temperature of the heat pump air conditioner system is too low. When the evaporation t...

Claims

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Application Information

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IPC IPC(8): F24F5/00F24F11/42F24F11/67F24F11/84F25B13/00F25B40/02F25B41/00F25B41/20F25B41/34F25B47/02F25B49/02
CPCF24F5/001F24F11/67F24F11/42F24F11/84F25B13/00F25B41/34F25B41/20F25B41/00F25B40/02F25B47/02F25B49/02Y02B30/70
Inventor 陈旗鱼剑琳晏刚李胤松
Owner XI AN JIAOTONG UNIV
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