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A kind of control method of vehicle-mounted heat pump air conditioning unit

A heat pump air conditioner and control method technology, applied in vehicle parts, air treatment equipment, heating/cooling equipment, etc., can solve the problems of lubricating oil carbonization failure, large compressor, and high compressor discharge temperature

Active Publication Date: 2021-07-27
HUNAN VAQOUNG ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are two difficult technical problems in the heating of domestic vehicle-mounted heat pump air conditioners. One is that when operating at low ambient temperature, the suction specific volume of the compressor increases and the pressure ratio is large, which causes a significant drop in the heating energy efficiency ratio. The heating capacity attenuation is severe; the second is that when the ambient temperature is lower than -15°C, due to the high pressure ratio of the compressor, the discharge temperature of the compressor is too high, which may easily cause the carbonization of the lubricating oil to fail, and the compressor will not be effectively lubricated and damaged , it is difficult for the heat pump to operate reliably and stably for a long time

Method used

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  • A kind of control method of vehicle-mounted heat pump air conditioning unit
  • A kind of control method of vehicle-mounted heat pump air conditioning unit
  • A kind of control method of vehicle-mounted heat pump air conditioning unit

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Embodiment 1

[0060] Embodiment 1: as Figure 1-12 , a control method for a vehicle-mounted heat pump air-conditioning unit, adding an air supply circuit on the basis of the main circuit of the vehicle-mounted heat pump air-conditioning unit;

[0061] The main circuit is provided with a main circuit electronic expansion valve 5, a compressor 1, a gas-liquid separator 12, a condenser 4 and an evaporator 11;

[0062]The main circuit and the air supply circuit exchange heat through the economizer; the air supply circuit is equipped with an air supply electronic expansion valve and a one-way valve; the gas output from the air supply circuit enters the middle compression chamber of the compressor.

[0063] There is a four-way valve 3 in the vehicle-mounted heat pump air-conditioning unit;

[0064] The four-way valve has four ports D, E, S and C; where E, S and C ports are on the same side and S port is between E port and C port;

[0065] The E port of the four-way valve is connected to the inl...

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Abstract

The invention discloses a control method for a vehicle-mounted heat pump air-conditioning unit. On the basis of the main circuit of the vehicle-mounted heat pump air-conditioning unit, an air supply circuit is added; the main circuit is provided with a main circuit electronic expansion valve (5), a compressor machine (1), gas-liquid separator (12), condenser (4) and evaporator (11); the main circuit and air supply circuit exchange heat through an economizer; the air supply circuit is equipped with an air supply electronic expansion valve and One-way valve; the gas output from the air supply circuit enters the middle compression chamber of the compressor. The control method of the vehicle-mounted heat pump air-conditioning unit is particularly suitable for operation in a low-temperature environment, and has high reliability.

Description

technical field [0001] The invention relates to a control method of a vehicle-mounted heat pump air conditioner unit. Background technique [0002] At present, there are two difficult technical problems in the heating of domestic vehicle-mounted heat pump air conditioners. One is that when operating at low ambient temperature, the suction specific volume of the compressor increases and the pressure ratio is large, which causes a significant drop in the heating energy efficiency ratio. The heating capacity attenuation is severe; the second is that when the ambient temperature is lower than -15°C, due to the high pressure ratio of the compressor, the discharge temperature of the compressor is too high, which may easily cause the carbonization of the lubricating oil to fail, and the compressor will not be effectively lubricated and damaged , it is difficult for the heat pump to operate reliably and stably for a long time. Therefore, it is necessary to design a control method f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60H1/22
CPCB60H1/22
Inventor 罗岳华
Owner HUNAN VAQOUNG ELECTRIC
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