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Direct expansion type fresh air conditioning system and control method

A fresh air conditioner and control method technology, applied in heating and ventilation control systems, heating and ventilation safety systems, refrigerators, etc., can solve problems such as poor heat transfer effect of evaporators, uneven liquid distribution, and low system performance, and achieve Improve the uniformity of liquid distribution, improve heat transfer matching, and improve the effect of system energy efficiency

Active Publication Date: 2022-02-25
HUBEI CHINA TOBACCO IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are defects such as high dryness of the refrigerant at the inlet of the medium-pressure evaporator, and uneven distribution of liquid between channels of the medium-pressure evaporator, which affects the heat transfer effect of the evaporator.
[0005] The above-mentioned disclosed technology mainly uses double evaporators to realize cascade cooling and dehumidification of fresh air, but there are problems such as poor heat transfer effect of evaporators, low system performance, etc., and it is not easy to switch between cooling and dehumidification modes and cooling modes

Method used

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  • Direct expansion type fresh air conditioning system and control method
  • Direct expansion type fresh air conditioning system and control method
  • Direct expansion type fresh air conditioning system and control method

Examples

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Effect test

Embodiment 1

[0033] Such as figure 1 As shown, the present invention provides a direct expansion fresh air air conditioning system, including a first compressor 1, a second compressor 2, a condenser 3, a heat regenerator 4, a second throttling device 5, a second evaporator 6, Intermediate heat exchanger 7, first throttling device 8 and first evaporator 9;

[0034] The outlet of the first compressor 1 and the outlet of the second compressor 2 are connected in parallel to the inlet of the condenser 3, the outlet of the condenser 3, the intermediate heat exchanger 7, the first throttling device 8, the first evaporator 9 and The inlet of the first compressor 1 is connected in sequence, the outlet of the condenser 3, the regenerator 4, the second throttling device 5, the intermediate heat exchanger 7, the second evaporator 6, the regenerator 4 and the second compressor 2 The imports are connected in turn.

[0035] In the intermediate heat exchanger 7, the refrigerant from the first path of th...

Embodiment 2

[0047] Such as figure 2 As shown, a direct expansion fresh air air conditioning system includes: a first compressor 1, a second compressor 2, a condenser 3, a heat regenerator 4, a second throttling device 5, a second evaporator 6, an intermediate exchanger The heater 7, the first throttling device 8, the first evaporator 9, the first compressor 1 and the second compressor 2 together form a two-stage compressor;

[0048] The outlet of the first compressor 1 is connected to the inlet of the second compressor 2, the outlet of the second compressor 2 is connected to the inlet of the condenser 3, the outlet of the condenser 3, the intermediate heat exchanger 7, and the first throttling device 8 , the first evaporator 9 and the inlet of the first compressor 1 are connected in sequence; the outlet of the condenser 3, the regenerator 4, the second throttling device 5, the intermediate heat exchanger 7, the second evaporator 6, and the regenerator 4 and the inlet of the second compr...

Embodiment 3

[0061] Such as image 3 As shown, a direct expansion fresh air air conditioning system includes: a first compressor 1, a condenser 3, a regenerator 4, a second throttling device 5, a second evaporator 6, an intermediate heat exchanger 7, a first A throttling device 8 and a first evaporator 9, and the first compressor 1 is a quasi-two-stage compressor;

[0062] The outlet of the first compressor 1 is connected to the inlet of the condenser 3, the outlet of the condenser 3, the intermediate heat exchanger 7, the first throttling device 8, the first evaporator 9 and the suction port of the first compressor 1 in sequence The outlet of the condenser 3, the regenerator 4, the second throttling device 5, the intermediate heat exchanger 7, the second evaporator 6, the regenerator 4 and the inlet of the first compressor 1 are connected in sequence.

[0063] In the intermediate heat exchanger 7, the refrigerant from the first path of the condenser 3 exchanges heat with the refrigerant ...

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Abstract

The invention discloses a direct expansion type fresh air conditioning system and a control method. The direct expansion type fresh air conditioning system comprises a first compressor, a second compressor, a condenser, a heat regenerator, a second throttling device, a second evaporator, an intermediate heat exchanger, a first throttling device and a first evaporator; an outlet of the first compressor and an outlet of the second compressor are connected in parallel and then are connected with an inlet of the condenser; an outlet of the condenser, the intermediate heat exchanger, the first throttling device, the first evaporator and an inlet of the first compressor are sequentially connected with one another; an outlet of the condenser, the heat regenerator, the second throttling device, the intermediate heat exchanger, the second evaporator, the heat regenerator and an inlet of the second compressor are sequentially connected with one another. The cooling and dehumidification function or the cooling and non-dehumidification function of fresh air is achieved by adjusting work of the first compressor, the first throttling device, the second compressor and the second throttling device.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a direct expansion fresh air air conditioning system and a control method. Background technique [0002] Due to the need for fresh air cooling and dehumidification, the temperature drop of the fresh air of the direct expansion fresh air air conditioning unit is significantly greater than the temperature rise of the heat sink fluid, that is, the mismatch between the refrigerant and the air heat exchange on the evaporator side of the conventional direct expansion fresh air air conditioning unit is significantly greater than On the condenser side, this affects the performance improvement of the direct expansion fresh air air conditioning system. [0003] CN110375404A discloses a fresh air air conditioner with double evaporating temperatures and a control method thereof, which uses two evaporators and a double suction compressor to realize stepwise cooling and dehumidificati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00F25B1/10F25B31/00F25B39/02F25B39/04F25B41/30F25B49/02F24F11/65F24F11/70F24F11/86
CPCF25B1/00F25B1/10F25B31/00F25B39/02F25B39/04F25B41/30F25B49/02F25B49/022F24F11/65F24F11/70F24F11/86Y02B30/70
Inventor 俞忠明许晓群库慧益崔梦迪王宝龙齐延会王翠灵韦发林
Owner HUBEI CHINA TOBACCO IND
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