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Two-stage compression and air supplementing device, air conditioning system and air supplementing control method

A two-stage compression and air-conditioning system technology, applied in heating and ventilation control systems, heating and ventilation safety systems, refrigerators, etc., can solve the problem that the amount of supplementary air cannot be adjusted according to working conditions, and achieve the purpose of improving flexibility and reliability Effect

Active Publication Date: 2020-03-27
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a two-stage compression air supply device, an air conditioning system and an air supply control method to solve the technical problem in the prior art that the air supply volume of the flash tank air supply method cannot be adjusted according to the working conditions

Method used

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  • Two-stage compression and air supplementing device, air conditioning system and air supplementing control method
  • Two-stage compression and air supplementing device, air conditioning system and air supplementing control method
  • Two-stage compression and air supplementing device, air conditioning system and air supplementing control method

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Embodiment 1

[0050] Such as figure 1 As shown, the present invention provides a high-temperature enthalpy-injection refrigeration system (single cooler), comprising an evaporator 3, a condenser 4, an enthalpy-injection compressor 2, a three-hole flash tank 1, and an electronic expansion valve EXV1 And the electronic expansion valve EXV2, as well as the exhaust temperature sensing package 6 and the suction temperature sensing package 5. Among them, the flash tank 1 is between the evaporator 3 and the condenser 4, and the electronic expansion valve EXV1 mainly controls the air supply volume, one end of which is connected to the outlet of the flash tank 1, and the other end is connected to the air supply port of the compressor 2; EXV2 mainly controls Exhaust temperature, one end of which is connected to the outlet of flash tank 1, and the other end is connected to the inlet pipe of evaporator 3.

[0051] When supplementary air control is required, the supplementary air electronic expansion v...

Embodiment 2

[0055] The difference between Embodiment 2 and Embodiment 1 lies in the addition of the four-way valve 7 and the third valve body (electronic expansion valve EXV3).

[0056] Such as figure 2 As shown, the present invention provides a high-temperature enthalpy-injecting refrigeration system (heat pump), comprising an evaporator 3, a condenser 4, an enthalpy-injecting compressor 2, a flash tank 1, a four-way valve 7, three Electronic expansion valves EXV1, EXV2 and EXV3, and exhaust temperature sensing package 6 and suction temperature sensing package 5.

[0057] During refrigeration operation: the cooled refrigerant from the outlet of condenser 4 flows into flash tank 1 after passing through EXV3, and the steam from flash tank 1 flows into compressor 2 after passing through electronic expansion valve EXV1 to control the amount of supplementary air Air supply port; another subcooled refrigerant from the flash tank 1 flows into EXV2 for throttling, and after throttling, the sat...

Embodiment 3

[0061] Such as image 3 As shown, the present invention provides a high-temperature enthalpy-spray refrigeration system (single cooler) with refrigerant pipe cooling. Compared with Embodiment 1, a refrigerant pipe cooling device 8 is added.

[0062] The high-temperature enthalpy injection refrigeration system includes an evaporator 3, a condenser 4, an enthalpy injection compressor 2, a three-hole flash tank 1, a refrigerant pipe cooling device 8, electronic expansion valves EXV1 and EXV2, and exhaust temperature sensing Package 6 and suction temperature sensing package 5. Among them, the refrigerant pipe cooling device 8 is on the outlet pipe of the condenser 4, and the electronic expansion valve EXV1 mainly controls the amount of air supply, one end of which is connected to the outlet of the flash tank 1, and the other end is connected to the air supply port of the compressor 2; EXV2 mainly controls the exhaust temperature, one end is connected to the outlet of flash tank 1...

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Abstract

The invention provides a two-stage compression and air supplementing device, an air conditioning system and an air supplementing control method, relates to the technical field of air conditioners, andsolves the technical problem that the air supplementing amount of an existing flash tank air supplementing mode cannot be adjusted according to working conditions. The air supplementing device comprises a three-hole flash tank, an air supplementing pipeline and a temperature detection device, the flash tank communicates with an air supplementing port of a compressor through the air supplementingpipeline, and a first valve body is arranged in the air supplementing pipeline; the temperature detection device at least can detect the outdoor environment temperature, the suction temperature of thecompressor, the outer pipe temperature of the outdoor unit and the evaporation pipe temperature of the indoor unit and calculate the suction superheat degree according to the temperature value so asto control the opening degree of the first valve body. The opening and closing of the first valve body are determined according to the outdoor environment temperature, and the opening degree of the first valve body is controlled according to the air suction superheat degree in the opening state, so that the purpose of adjusting the air supplementing amount according to the working condition is achieved, the situation that the compressor is damaged due to excessive air supplementing is avoided, and the flexibility and reliability of the compressor are improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a two-stage compression air supply device, an air conditioning system and an air supply control method. Background technique [0002] The higher the outdoor ambient temperature, the greater the room cooling demand load. Ordinary air conditioners operate at high ambient temperatures, and the higher the temperature, the greater the capacity attenuation, which affects the comfort of users. It is usually solved by two-stage compression air supply and enthalpy injection, but the traditional flash tank air supply scheme adopts one-stage throttling and two-stage throttling schemes for air replenishment, the amount of air replenishment cannot be precisely controlled, and over-fill air is prone to occur Cause compressor rehydration and damage the compressor. Especially in some hot or cold areas with large indoor and outdoor temperature differences, it is urgent to study a new c...

Claims

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Application Information

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IPC IPC(8): F24F11/30F24F11/64F24F11/65F24F11/84F24F11/86F24F11/88F25B41/06F25B49/02F24F110/12F24F140/20F25B41/34
CPCF24F11/30F24F11/64F24F11/65F24F11/84F24F11/86F24F11/88F25B49/022F24F2110/12F24F2140/20F25B2500/28F25B41/31
Inventor 熊建国汪俊勇余凯胡知耀李志强
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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