CN-119642464-B - Fluorine pump starting method, control device, dual-cycle refrigerating system and storage medium

CN119642464BCN 119642464 BCN119642464 BCN 119642464BCN-119642464-B

Abstract

The application provides a fluorine pump starting method, a control device, a double-circulation refrigerating system and a computer readable storage medium, which can shorten the starting time of a fluorine pump and improve the success rate of the starting of the fluorine pump. The fluorine pump starting method comprises the steps of determining that conditions for starting the fluorine pump in an auxiliary mode are met, starting the fluorine pump in an auxiliary mode through the compressor, wherein the step of starting the fluorine pump in an auxiliary mode comprises the steps of starting the compressor firstly, starting the fluorine pump later, and closing the compressor after the fluorine pump is started.

Inventors

YANG KAIZHONG
DING YUNXIAO
ZENG HAIYUAN
GUO ZHENGYU
YANG QINGCHUAN
SU LIN
YAN LIBO
JIA XIAOQI
CHEN WEI
LEI HAITAO

Assignees

广东美的暖通设备有限公司
美的集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20230915

Claims (10)

1. The fluorine pump starting method is used for a double-circulation refrigerating system and is characterized by comprising a compressor, a fluorine pump and a condensing fan, wherein the double-circulation refrigerating system is provided with a compressor refrigerating mode and a fluorine pump refrigerating mode, and the compressor and the fluorine pump respectively supply power for refrigerating operation of the system in the compressor refrigerating mode and the fluorine pump refrigerating mode; the fluorine pump starting method comprises the following steps: determining that the condition of auxiliary starting of the fluorine pump by the compressor is satisfied; starting the fluorine pump with the aid of a compressor; the auxiliary starting of the fluorine pump through the compressor comprises starting the compressor, starting the fluorine pump after the compressor meets a first set operation condition, and enabling the fluorine pump to operate together with the compressor; The method for starting the fluorine pump further comprises the steps of controlling the rotating speed of a condensing fan before starting the fluorine pump and enabling the fluorine pump to operate together with the compressor, and executing the step of starting the fluorine pump and enabling the fluorine pump to operate together with the compressor based on the establishment of a third set operating condition; the compressor meets a first set operation condition, the compressor is started successfully, the suction and exhaust pressure difference is built, the fluorine pump meets a second set operation condition, the fluorine pump is started successfully and runs stably, and the third set operation condition is met, the operation of the condensing fan is indicated not to influence the starting of the fluorine pump.
2. The fluorine pump startup method according to claim 1, wherein the first set of operating conditions comprises at least one of: the difference between the discharge pressure and the suction pressure of the compressor reaches a set pressure difference range; the operation time length of the compressor reaches a first set time length range.
3. The fluorine pump startup method according to claim 1, wherein the second set of operating conditions comprises at least one of: The lift of the fluorine pump reaches a set lift range; and the operation time length of the fluorine pump reaches a second set time length range.
4. A fluorine pump start-up method according to any of claims 1 to 3, characterized in that the controlling of the rotational speed of the condensing fan comprises: before the compressor meets a first set running condition, controlling the rotating speed of the condensing fan to be a first set rotating speed; and controlling the rotating speed of the condensing fan to be a second set rotating speed based on the condition that the compressor meets a first set operating condition, wherein the second set rotating speed is higher than the first set rotating speed.
5. The method of claim 4, wherein the third set of operating conditions includes a third set of operating time ranges for which the condensing fan is operating at the second set of rotational speeds.
6. A method for starting up a fluorine pump according to any of claims 1 to 3, In the step of starting the compressor, the compressor is controlled to start at a third set rotational speed, and/or In the step of starting the fluorine pump, the fluorine pump is controlled to start at a fourth set rotational speed.
7. A fluorine pump start-up method according to any of claims 1 to 3, wherein the compressor-assisted start-up fluorine pump conditions comprise at least one of: the outdoor environment temperature is within a set temperature range; the fluorine pump failed to self-start.
8. A control device comprising a processor and a memory storing a computer program, the processor implementing the steps of the fluorine pump starting method according to any one of claims 1 to 7 when executing the computer program.
9. A dual cycle refrigeration system comprising the control device of claim 8.
10. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the fluorine pump starting method according to any one of claims 1 to 7.

Description

Fluorine pump starting method, control device, dual-cycle refrigerating system and storage medium Technical Field The application relates to the technical field of refrigeration systems, in particular to a fluorine pump starting method, a control device, a dual-cycle refrigeration system and a computer readable storage medium. Background Because the equipment in the machine room generates a large amount of heat and runs throughout the year, the equipment needs to be refrigerated throughout the year. For energy saving and emission reduction, many air conditioner manufacturers develop machine room air conditioners using a compressor and fluorine pump dual-cycle refrigeration system. The compressor refrigeration mode is mainly adopted under the condition of higher outdoor temperature in summer, and the fluorine pump refrigeration mode is mainly adopted under the condition of lower outdoor temperature in winter, so that the purposes of energy conservation and emission reduction are achieved. Because of the great advantage of the centrifugal pump in terms of service life, the existing double-circulation refrigerating system of the fluorine pump compressor of the machine room air conditioner often uses the centrifugal pump as a refrigerant conveying device. However, the centrifugal pump is easy to cut off due to the fact that the centrifugal pump lift is lost because liquid seal cannot be carried out when the refrigerant at the inlet is vaporized, and the condition of cutting off the fluorine pump is difficult to completely avoid when the supercooling degree of the inlet of the pump is low and the environment is extremely changed due to the existence of the liquid storage tank. At ultra-low temperatures, the fluorine pump is difficult to restart after shut down. In the prior art, after cold air is blown for a long time, the fluorine pump is started, and the required time is long. Disclosure of Invention The application aims to solve the technical problem of providing a fluorine pump starting method, a control device, a double-circulation refrigerating system and a computer readable storage medium, which can shorten the starting time of the fluorine pump and improve the starting success rate of the fluorine pump. To this end, an embodiment of the present application provides a method for starting a fluorine pump, which is used for a dual-cycle refrigeration system, and includes: determining that the condition of auxiliary starting of the fluorine pump by the compressor is satisfied; starting the fluorine pump with the aid of a compressor; The auxiliary starting of the fluorine pump by the compressor comprises the steps of starting the compressor firstly, starting the fluorine pump later, and closing the compressor after the fluorine pump is started. According to the fluorine pump starting method provided by the embodiment of the application, when the fluorine pump needs to be started, whether the condition of auxiliary starting of the fluorine pump by the compressor is met can be judged. When it is determined that the compressor-assisted start-up fluorine pump condition is established, the start-up of the fluorine pump may be assisted by the compressor. The compressor is started firstly, so that higher pressure can be generated in the system, the pressure at the inlets of the liquid storage tank and the fluorine pump can be increased rapidly, the saturation temperature of the refrigerant in the liquid storage tank can be improved, the refrigerant in the liquid storage tank is prevented from being higher than the saturation temperature, vaporization of the refrigerant is avoided, the fluorine pump is started on the basis, the compressor keeps running in the starting process of the fluorine pump, the pressure of the refrigerant in the liquid storage tank and at the inlets of the fluorine pump can be kept continuously, and the influence on the starting process of the fluorine pump caused by vaporization of the refrigerant due to sudden pressure reduction caused by the closing of the compressor in the starting process of the fluorine pump is avoided. The compressor is turned off after the start of the fluorine pump is completed. Compared with the scheme that the fluorine pump is started by cooling the liquid storage tank through the long-time blowing of the condensing fan, the temperature of the refrigerant in the liquid storage tank is reduced to be difficult to vaporize in the starting process, the scheme can rapidly increase the pressure of the liquid storage tank and the inlet of the fluorine pump through starting the compressor, and the refrigerant vaporization is avoided. The pressure response speed in the process is obviously faster than the temperature response speed, so the scheme can shorten the time required for starting the fluorine pump. Compared with the method that the compressor is stopped and then the fluorine pump is started after the compressor is operated for a period of time, the compressor is clo