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Start method for quickly discharging pressure of compressor of refrigeration system

A refrigeration system and compressor technology, which is applied to refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of high cost, difficulty in starting compressors under pressure, and increased manufacturing and maintenance costs of refrigeration devices.

Inactive Publication Date: 2012-06-13
BEIJING QINGLUAN SHENGCHANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Compression refrigeration systems usually include components such as compressors, condensers, capillary tubes or expansion valves, and evaporators. The disadvantage is that when the compressor stops, it needs to wait for the pressure in the high-pressure area and low-pressure area to reach a natural balance, that is, to release the pressure. After that, the compressor can be restarted again. For example, in the control system of a household air conditioner, it is usually set to restart the compressor after the compressor is stopped for 3 minutes. However, in some applications, people need to restart after the compressor stops. Immediately restart the compressor, at this time there is a problem that the compressor is difficult to start under pressure
However, due to the need to add a special pressure relief bypass and use expensive solenoid valves, it will undoubtedly increase the manufacturing and maintenance costs of the refrigeration device

Method used

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  • Start method for quickly discharging pressure of compressor of refrigeration system
  • Start method for quickly discharging pressure of compressor of refrigeration system
  • Start method for quickly discharging pressure of compressor of refrigeration system

Examples

Experimental program
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Effect test

Embodiment 1

[0013] Example 1, such as figure 2 As shown, the refrigeration device 20 includes a compressor 201, a condenser 202, an electronic expansion valve 203, and an evaporator 204. The refrigeration device 20 also includes a control device 205, and the output terminal of the control device 205 is connected to the input of the compressor 201 and the electronic expansion valve 203. When the control device 203 sends a stop or start command to the compressor 201, the control device 203 sends a control command to the electronic expansion valve 203 to open the opening of the electronic expansion valve 203 to between 50% and 100%. A certain degree of opening, and keep it for at least 10-20 seconds, preferably at an opening degree of 80% for 10 seconds.

Embodiment 2

[0014] Example 2, such as figure 2 As shown, the heat pump water heater 30 includes a compressor 301, a condenser 302, an electronic expansion valve 303, an evaporator 304, and a hot water tank 307. The heat pump water heater 30 also includes a control device 305 and a water flow switch 306. The water flow switch 306 is arranged on the heat pump The hot water output end of the water heater 30, the output end of the control device 305 are respectively electrically connected with the input end of the compressor 301 and the electronic expansion valve 303, the output end of the water flow switch 306 is electrically connected with the input end of the control device 305, and the water flow switch 306 is electrically connected with the input end of the control device 305. The compressor 301 is linked. When the water flow switch 306 detects the water flow, the control device 305 controls the compressor 301 to start running. When the water flow switch 306 detects that the water flow s...

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Abstract

The invention provides a start method for quickly discharging pressure of a compressor of a refrigeration system. The start method comprises the following step of: opening an expansion valve to a preset opening for preset time when the compressor is stopped and / or started. The expansion valve is opened to the preset opening for the preset time when the compressor is stopped and / or started, so a high pressure area and a low pressure area at both sides of the expansion valve are quickly communicated, the pressure difference between the high pressure area and the low pressure area of the refrigeration system is quickly reduced, and even the pressure is balanced; and the compressor can be normally started when restarted after waiting for a short time, so that the compressor is quickly started. The method has the advantages of simpleness, easy use and low cost, is particularly suitable for application occasions such as a heat pump water heater and the like in which the compressor is needed to be frequently started.

Description

Technical field: [0001] The invention relates to a method for quickly releasing pressure and starting a compressor in a refrigeration system, belonging to the technical field of refrigeration. Background technique: [0002] Compression refrigeration systems usually include components such as compressors, condensers, capillary tubes or expansion valves, and evaporators. The disadvantage is that when the compressor stops, it needs to wait for the pressure in the high-pressure area and low-pressure area to reach a natural balance, that is, to release the pressure. After that, the compressor can be restarted again. For example, in the control system of a household air conditioner, it is usually set to restart the compressor after the compressor is stopped for 3 minutes. However, in some applications, people need to restart after the compressor stops. Immediately restart the compressor. At this time, there is a problem that the compressor is difficult to start under pressure. Su...

Claims

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Application Information

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IPC IPC(8): F25B49/02F24H9/20
Inventor 龚文浩李和义李彦
Owner BEIJING QINGLUAN SHENGCHANG TECH
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