CN117469871B

CN117469871B - Control method and device of refrigeration system, refrigeration system and storage medium

Info

Publication number: CN117469871B
Application number: CN202311808013.7A
Authority: CN
Inventors: 华晨涛; 卢起彪; 李凯; 牛二帅; 丁瑞
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2023-12-26
Filing date: 2023-12-26
Publication date: 2024-04-05
Anticipated expiration: 2043-12-26
Also published as: CN117469871A

Abstract

The application relates to a control method, a device, a refrigeration system and a storage medium of a refrigeration system, wherein the method is applied to the refrigeration system, the refrigeration system comprises a high-temperature refrigeration cycle loop, a low-temperature refrigeration cycle loop and a throttle pipeline, the low-temperature refrigeration cycle loop comprises a condensation pipeline and a return air pipeline, one end of the throttle pipeline is connected with the condensation pipeline, the other end of the throttle pipeline is connected with the return air pipeline, and a pipeline control piece is arranged at the joint of the throttle pipeline and the condensation pipeline, and the method comprises the following steps: after the refrigerating system is electrified, the high-temperature refrigerating circulation loop is controlled to be started; after the high-temperature refrigeration cycle loop is started, if the low-temperature refrigeration cycle loop is determined to be started, controlling the low-temperature refrigeration cycle loop to be started; after the low-temperature refrigeration cycle loop is started, acquiring a first actual exhaust pressure of a first compressor in the low-temperature refrigeration cycle loop; the pipe control is controlled in accordance with the first actual exhaust pressure. The application improves the refrigeration efficiency of the refrigeration system and the service life of the first compressor.

Description

Control method and device of refrigeration system, refrigeration system and storage medium

Technical Field

The present disclosure relates to the field of refrigeration technologies, and in particular, to a control method and apparatus for a refrigeration system, and a storage medium.

Background

Along with the development of science and technology and the improvement of life quality, the application of the low-temperature refrigeration technology in the aspects of medical treatment and health, food material storage and the like is wider. In order to obtain a better low-temperature environment, the adoption of a single-stage or double-stage vapor compression type refrigerating system is difficult to realize, and the effect of the cascade refrigerating system on obtaining the low temperature is remarkable, so that the cascade refrigerating system is generally adopted to obtain the low-temperature environment. However, at present, when the cascade refrigeration system is started, a high-temperature refrigeration cycle loop of the cascade refrigeration system is usually started first, and then a low-temperature refrigeration cycle loop is started, but when the ambient temperature is higher, in the process of starting the low-temperature refrigeration cycle loop, a compressor in the low-temperature refrigeration cycle loop can jump due to higher exhaust temperature, so that the refrigeration efficiency of the refrigeration system and the service life of the compressor can be influenced.

Disclosure of Invention

The application provides a control method and device of a refrigeration system, the refrigeration system and a storage medium, and aims to solve the technical problem that the refrigeration efficiency of the cascade refrigeration system and the service life of a compressor are affected when the cascade refrigeration system is started in the prior art.

In a first aspect, the present application provides a control method of a refrigeration system, the refrigeration system including a high-temperature refrigeration cycle loop, a low-temperature refrigeration cycle loop, and a throttle pipe, the low-temperature refrigeration cycle loop including a condensation pipe and an air return pipe, one end of the throttle pipe being connected with the condensation pipe, the other end of the throttle pipe being connected with the air return pipe, a joint of the throttle pipe and the condensation pipe being provided with a pipe control member, the method comprising:

after the refrigerating system is electrified, the high-temperature refrigerating circulation loop is controlled to be started;

after the high-temperature refrigeration cycle loop is started, if the low-temperature refrigeration cycle loop is determined to be started, controlling the low-temperature refrigeration cycle loop to be started;

after the low-temperature refrigeration cycle loop is started, acquiring a first actual exhaust pressure of a first compressor in the low-temperature refrigeration cycle loop;

the pipe control is controlled in accordance with the first actual exhaust pressure.

In an alternative embodiment, said controlling said pipe control according to said first actual exhaust pressure comprises:

determining whether the first actual discharge pressure is greater than a preset discharge pressure that characterizes a discharge pressure of the first compressor required for conduction between the condensing line, the throttling line, and the return line;

And when the first actual exhaust pressure is greater than the preset exhaust pressure, controlling the pipeline control part to work so as to conduct among the condensing pipeline, the throttling pipeline and the air return pipeline.

In an alternative embodiment, after performing the step of controlling operation of the line control to cause communication between the condensing line, the throttling line, and the return line, the method further comprises:

acquiring a second actual discharge pressure of the first compressor;

determining whether the second actual discharge pressure is within a preset discharge pressure range, the preset discharge pressure range being used for representing a discharge pressure range allowing the cryogenic refrigeration cycle to be opened;

and when the second actual exhaust pressure is within the preset exhaust pressure range, controlling the pipeline control part to be closed so as to enable the condensing pipeline, the throttling pipeline and the return air pipeline to be closed.

In an alternative embodiment, the determining that the low temperature refrigeration cycle needs to be started includes:

after the high-temperature refrigeration cycle loop is started, obtaining a third actual exhaust pressure of the first compressor;

Determining whether the third actual discharge pressure is within a preset discharge pressure range, the preset discharge pressure range being used for representing a discharge pressure range allowing the cryogenic refrigeration cycle to be opened;

and when the third actual exhaust pressure is within the preset exhaust pressure range, determining that the low-temperature refrigeration cycle is required to be started.

In an alternative embodiment, the refrigeration system further includes a bypass line, one end of the bypass line is connected to the line control member, the other end of the bypass line is connected to the return line, the bypass line is used for introducing the refrigerant in the return line to the condensation line, the high-temperature refrigeration cycle loop and the low-temperature refrigeration cycle loop are coupled through an evaporation condenser, and a condensation side of the evaporation condenser is disposed in the condensation line;

the method further comprises the steps of:

when the high-temperature refrigeration cycle loop is controlled to be started, the pipeline control piece is controlled to work so as to introduce the refrigerant in the air return pipeline into the condensation pipeline through the bypass pipeline, so that the condensation side of the evaporation condenser condenses the refrigerant in the condensation pipeline.

In an alternative embodiment, said controlling the high temperature refrigeration cycle to be turned on includes:

controlling the high-temperature refrigeration cycle loop to be opened at a first preset frequency, wherein the first preset frequency is used for representing a frequency corresponding to a low-frequency mode of a second compressor in the high-temperature refrigeration cycle loop;

after the high-temperature refrigeration cycle loop is started, if the low-temperature refrigeration cycle loop is determined to be started, controlling the low-temperature refrigeration cycle loop to be started, including:

after the high-temperature refrigeration cycle loop is started, controlling the high-temperature refrigeration cycle loop to be increased to a second preset frequency, so that the high-temperature refrigeration cycle loop runs at the second preset frequency, wherein the second preset frequency is used for representing the highest frequency which can be achieved by the second compressor;

and in the process that the high-temperature refrigeration cycle loop operates at the second preset frequency, if the low-temperature refrigeration cycle loop is determined to be started, controlling the low-temperature refrigeration cycle loop to be started.

In an alternative embodiment, said controlling said cryo-refrigeration cycle to be turned on includes:

controlling the low-temperature refrigeration cycle to be started at a third preset frequency, wherein the third preset frequency is used for representing a frequency corresponding to a low-frequency mode of the first compressor;

After the low-temperature refrigeration cycle loop is started, acquiring a first actual discharge pressure of a first compressor in the low-temperature refrigeration cycle loop, including:

after the low-temperature refrigeration cycle loop is started, controlling the low-temperature refrigeration cycle loop to raise the frequency;

and in the process of raising the frequency of the low-temperature refrigeration cycle loop to a fourth preset frequency, acquiring the first actual exhaust pressure of the first compressor in the low-temperature refrigeration cycle loop, wherein the fourth preset frequency is used for representing the highest frequency which can be achieved by the second compressor.

In a second aspect, the present application provides a control device of a refrigeration system, the refrigeration system including a high-temperature refrigeration cycle circuit, a low-temperature refrigeration cycle circuit and a throttle pipeline, the low-temperature refrigeration cycle circuit including a condensation pipeline and a return air pipeline, one end of the throttle pipeline being connected with the condensation pipeline, the other end of the throttle pipeline being connected with the return air pipeline, the throttle pipeline being provided with a pipeline control member at the junction of the condensation pipeline, the device comprising:

the control module is used for controlling the high-temperature refrigeration cycle loop to be started after the refrigeration system is electrified;

The control module is further used for controlling the low-temperature refrigeration cycle circuit to be started if the low-temperature refrigeration cycle circuit is determined to be started after the high-temperature refrigeration cycle circuit is started;

the acquisition module is used for acquiring the first actual exhaust pressure of the first compressor in the low-temperature refrigeration cycle after the low-temperature refrigeration cycle is started;

the control module is also used for controlling the pipeline control piece according to the first actual exhaust pressure.

In a third aspect, the present application provides a refrigeration system, a high temperature refrigeration cycle, a low temperature refrigeration cycle, a throttle line, a processor, and a memory;

the low-temperature refrigeration cycle loop comprises a condensation pipeline and an air return pipeline, one end of the throttling pipeline is connected with the condensation pipeline, the other end of the throttling pipeline is connected with the air return pipeline, a pipeline control piece is arranged at the joint of the throttling pipeline and the condensation pipeline, and the processor is connected with the high-temperature refrigeration cycle loop, the low-temperature refrigeration cycle loop, the pipeline control piece and the memory;

the processor is configured to execute a control program of the refrigeration system stored in the memory to implement the control method of the refrigeration system as described above.

In an alternative embodiment, the refrigeration system further includes a bypass line, one end of the bypass line is connected to the line control member, the other end of the bypass line is connected to the return line, the bypass line is used for introducing the refrigerant in the return line to the condensation line, the high-temperature refrigeration cycle loop and the low-temperature refrigeration cycle loop are coupled through an evaporation condenser, and a condensation side of the evaporation condenser is disposed in the condensation line.

In a fourth aspect, the present application also provides a storage medium storing one or more programs executable by one or more processors to implement the method of controlling a refrigeration system as described above.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the advantages that the method provided by the embodiment of the application is applied to a refrigerating system, the refrigerating system comprises a high-temperature refrigerating circulation loop, a low-temperature refrigerating circulation loop and a throttling pipeline, the low-temperature refrigerating circulation loop comprises a condensation pipeline and a return air pipeline, one end of the throttling pipeline is connected with the condensation pipeline, the other end of the throttling pipeline is connected with the return air pipeline, and a pipeline control piece is arranged at the joint of the throttling pipeline and the condensation pipeline, and the method comprises the following steps: after the refrigerating system is electrified, the high-temperature refrigerating circulation loop is controlled to be started; after the high-temperature refrigeration cycle loop is started, if the low-temperature refrigeration cycle loop is determined to be started, controlling the low-temperature refrigeration cycle loop to be started; after the low-temperature refrigeration cycle loop is started, acquiring a first actual exhaust pressure of a first compressor in the low-temperature refrigeration cycle loop; the pipe control is controlled in accordance with the first actual exhaust pressure. Through the mode, this application embodiment is through setting up throttle line to after low temperature refrigeration cycle circuit opens, carry out real-time detection to the exhaust pressure of the first compressor in the low temperature refrigeration cycle circuit, with the exhaust pressure condition according to the first compressor, control the pipeline control piece, so that when the exhaust pressure of the first compressor is too high, can release through the throttle line, avoided because the high and jump machine of first compressor exhaust pressure in the low temperature refrigeration cycle circuit start-up process, improved refrigerating system's refrigeration efficiency and the life of the first compressor.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is a flow chart of a control method of a refrigeration system according to an embodiment of the present application;

fig. 2 is a flow chart of another control method of a refrigeration system according to an embodiment of the present application;

FIG. 3 is a flow chart of a control method of a refrigeration system according to an embodiment of the present application;

Fig. 4 is a schematic structural diagram of a refrigeration system according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a control device of a refrigeration system according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of another refrigeration system according to an embodiment of the present application;

in the above figures:

10. a control module; 20. an acquisition module;

101. a first compressor; 102. an oil separator; 103. an oil return pipeline; 104. an evaporator; 105. a first capillary; 106. a first filter; 107. a pipeline control member; 108. a bypass line; 109. a third capillary; 110. a throttle pipeline; 111. an evaporative condenser; 112. a gas-liquid separator; 113. a second compressor; 114. an anti-condensation pipe; 115. a condenser; 116. a second filter; 117. a second capillary;

600. a refrigeration system; 601. a processor; 602. a memory; 6021. an operating system; 6022. an application program; 603. a user interface; 604. a network interface; 605. a bus system.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

Referring to fig. 1, fig. 1 is a flow chart of a control method of a refrigeration system according to an embodiment of the present application. The control method of the refrigerating system provided by the embodiment comprises the following steps:

s101: and after the refrigerating system is electrified, the high-temperature refrigerating circulation loop is controlled to be started.

In this embodiment, the execution body is a processor in a refrigeration system. Referring to fig. 4, the refrigeration system includes a high temperature refrigeration cycle circuit, a low temperature refrigeration cycle circuit, and a throttle line 110, the low temperature refrigeration cycle circuit includes a condensation line and a return line, one end of the throttle line is connected with the condensation line, the other end of the throttle line is connected with the return line, and a line control member 107 is provided at a junction of the throttle line and the condensation line. Specifically, the high temperature refrigeration cycle circuit and the low temperature refrigeration cycle circuit are coupled to each other by the evaporation condenser 111 to exchange heat between the high temperature refrigeration cycle circuit and the low temperature refrigeration cycle circuit. The condensation side of the evaporation condenser 111 is disposed in a condensation line in the low-temperature refrigeration cycle, and the evaporation side of the evaporation condenser 111 is disposed in the high-temperature refrigeration cycle.

The low-temperature refrigeration cycle further includes a first compressor 101, an oil separator 102, a first filter 106, a first capillary tube 105, and an evaporator 104, which are sequentially connected, and an intake port of the first compressor 101 is further connected to the oil separator 102 through an oil return line 103. The connection line between the discharge port of the first compressor 101 and the first capillary tube 105 is a condensation line, and the connection line between the first capillary tube 105 and the suction port of the first compressor 101 is a return line. The condensation side of the evaporative condenser 111 is disposed between the oil separator 102 and the first filter 106. Specifically, one end of the throttle line is connected to the condensation line between the oil separator 102 and the first filter 106, and the other end of the throttle line 110 is connected to the return line between the intake port of the first compressor 101 and the evaporator 104. The high-temperature refrigeration cycle includes a second compressor 113, an anti-condensation pipe 114, a condenser 115, a second filter 116, a second capillary 117, and a gas-liquid separator 112, which are sequentially connected, and an evaporation side of the evaporation condenser 111 is disposed between the second capillary 117 and the gas-liquid separator 112. Wherein the gas-liquid separator 112 stores liquid refrigerant at the evaporator outlet, avoiding liquid impact on the compressor, to reduce the life of the compressor. The anti-condensation pipe 114 is packaged at the door seam and plays a role in heating the door seal and reducing condensation and frost. The processor is respectively connected with the high-temperature refrigeration cycle loop, the low-temperature refrigeration cycle loop and the pipeline control piece.

In the above, the third capillary tube 109 is provided in the throttle line to realize pressure relief of the discharge pressure of the first compressor 101 in the low-temperature refrigeration cycle by throttling. The line control 107 is in effect a switching valve for controlling the conduction of the different lines. Controlling the high temperature refrigeration cycle to be turned on may be understood as controlling the second compressor 113 in the high temperature refrigeration cycle to be turned on.

S102: and after the high-temperature refrigeration cycle loop is started, if the low-temperature refrigeration cycle loop is determined to be started, controlling the low-temperature refrigeration cycle loop to be started.

In the present embodiment, controlling the low temperature refrigeration cycle to be turned on is understood as controlling the first compressor in the low temperature refrigeration cycle to be turned on. When the cascade refrigeration system is controlled to be started, the high-temperature refrigeration cycle loop is controlled to be started, after the high-temperature refrigeration cycle loop is started, the low-temperature refrigeration cycle loop can be detected to determine whether the low-temperature refrigeration cycle loop meets the starting condition, and when the low-temperature refrigeration cycle loop is determined to meet the starting condition, the low-temperature refrigeration cycle loop can be controlled to be started.

S103: after the low-temperature refrigeration cycle is started, a first actual discharge pressure of a first compressor in the low-temperature refrigeration cycle is obtained.

In this embodiment, in order to avoid the above problem, after the low-temperature refrigeration cycle is started, the first actual discharge pressure of the first compressor in the low-temperature refrigeration cycle is detected in real time, so that when the first actual discharge pressure of the first compressor is too high, the throttle pipeline is used to release pressure, so as to reduce the discharge pressure of the first compressor, and thus the first compressor in the low-temperature refrigeration cycle can be prevented from being tripped due to the too high discharge pressure. Specifically, the exhaust port of the first compressor is provided with a pressure sensor, and the pressure sensor is used for detecting the first actual exhaust pressure of the first compressor in the low-temperature refrigeration cycle in real time after the low-temperature refrigeration cycle is started, and sending the detected first actual exhaust pressure to a processor in the refrigeration system for processing.

S104: the pipe control is controlled in accordance with the first actual exhaust pressure.

In this embodiment, after the processor obtains the first actual exhaust pressure, the first actual exhaust pressure may be compared with the preset exhaust pressure to obtain a comparison result, and according to the comparison result, it is determined whether the current exhaust pressure of the first compressor is too high, and when the current exhaust pressure is too high, the pipeline control member may be controlled to conduct among the condensation pipeline, the throttle pipeline and the return air pipeline, so that the exhaust pressure of the first compressor may be reduced by releasing the pressure through the throttle pipeline.

According to the control method of the refrigerating system, provided by the embodiment, after the low-temperature refrigerating circulation loop is started, the exhaust pressure of the first compressor in the low-temperature refrigerating circulation loop is detected in real time, and the pipeline control piece is controlled according to the exhaust pressure condition of the first compressor, so that when the exhaust pressure of the first compressor is too high, the pressure can be relieved through the throttling pipeline, the phenomenon that the machine is jumped due to the fact that the exhaust pressure of the first compressor in the low-temperature refrigerating circulation loop is too high in the starting process of the low-temperature refrigerating circulation loop is avoided, and the refrigerating efficiency of the refrigerating system and the service life of the first compressor are improved.

Referring to fig. 2, fig. 2 is a flow chart of a control method of another refrigeration system according to an embodiment of the present application. The control method of the refrigerating system provided by the embodiment of the application comprises the following steps:

s201: after the refrigerating system is electrified, the high-temperature refrigerating circulation loop is controlled to be started, the control part of the control pipeline works, and therefore the refrigerant in the air return pipeline is introduced into the condensing pipeline through the bypass pipeline, and the condensing side of the evaporative condenser condenses the refrigerant in the condensing pipeline.

In this embodiment, referring to fig. 4, the refrigeration system provided in this embodiment further includes a bypass line 108, one end of the bypass line 108 is connected to the line control member 107, the other end of the bypass line 108 is connected to the return line, and the bypass line 108 is used for introducing the refrigerant in the return line to the condensation line. Specifically, the bypass line 108 is actually a bypass straight copper pipe, and the other end of the bypass line 108 is connected to a return line between the intake port of the first compressor 101 and the evaporator 104. In the traditional starting method of the refrigerating system, after the high-temperature refrigerating circulation loop is started, the condensing side of the evaporative condenser can only condense the refrigerant in the condensing pipeline under the blocking of the first compressor and the first capillary tube in the low-temperature refrigerating circulation loop, and the refrigerant in the air return pipeline can not be condensed, so that the starting of the low-temperature refrigerating circulation loop is slowed down. In order to accelerate the start of the low-temperature refrigeration cycle loop, so that the low-temperature environment is achieved more quickly, the bypass pipeline 108 is arranged in the embodiment, so that after the high-temperature refrigeration cycle loop is started, original refrigerant in the condensation pipeline is condensed, and the refrigerant flowing into the condensation pipeline from the air return pipeline through the bypass pipeline 108 is condensed, so that the whole low-pressure refrigeration cycle loop is precooled, the start of the low-temperature refrigeration cycle loop is accelerated, and the low-temperature environment can be achieved more quickly.

Wherein, the controlling the high temperature refrigeration cycle in the step S201 is opened, including:

the high temperature refrigeration cycle loop is controlled to be turned on at a first preset frequency, and the first preset frequency is used for representing a frequency corresponding to a low frequency mode of a second compressor in the high temperature refrigeration cycle loop.

In this embodiment, a plurality of operation modes corresponding to the second compressor and frequencies corresponding to the operation modes may be preset, and when the second compressor in the high-temperature refrigeration cycle is controlled to be turned on, the corresponding relationship may be queried to obtain a first preset frequency corresponding to the low-frequency mode from the corresponding relationship. In the embodiment, the second compressor in the high-temperature refrigeration cycle is controlled to be started at a lower frequency so as to ensure that the condensation temperature does not exceed the limit value, and the phenomenon that the compressor is jumped due to the excessively high discharge pressure is prevented.

S202: and after the high-temperature refrigeration cycle loop is started, if the low-temperature refrigeration cycle loop is determined to be started, controlling the low-temperature refrigeration cycle loop to be started.

In this embodiment, the step S202 specifically includes:

after the high-temperature refrigeration cycle loop is started, controlling the high-temperature refrigeration cycle loop to raise the frequency to a second preset frequency so that the high-temperature refrigeration cycle loop runs at the second preset frequency, wherein the second preset frequency is used for representing the highest frequency which can be reached by the second compressor;

After the high-temperature refrigeration cycle loop is started, the high-temperature refrigeration cycle loop can be increased to a second preset frequency according to a preset frequency increasing rate, so that the high-temperature refrigeration cycle loop operates according to the second preset frequency to rapidly refrigerate. The second preset frequency can be set according to actual needs, and specific values of the second preset frequency are not limited in this embodiment.

In the above, determining that the low-temperature refrigeration cycle needs to be started includes:

and when the third actual exhaust pressure is within the preset exhaust pressure range, determining that the low-temperature refrigeration cycle needs to be started.

Specifically, after the high temperature refrigeration cycle is turned on, and the high temperature refrigeration cycle has reached the highest frequency (i.e., the second preset frequency), the third actual discharge pressure step of the first compressor is performed. The method for obtaining the third actual exhaust pressure is consistent with the method for obtaining the first actual exhaust pressure, and may be specifically referred to above, which is not described herein in detail in this embodiment. The preset exhaust pressure range may be set according to actual needs, and in this embodiment, a specific threshold value of the preset exhaust pressure range is not limited. When the third actual exhaust pressure is determined to be within the preset exhaust pressure range, determining that the low-temperature refrigeration cycle needs to be started; and when the third actual exhaust pressure is not in the preset exhaust pressure range, continuously controlling the second compressor in the high-temperature refrigeration cycle to operate at a second preset frequency, and continuously executing the step of acquiring the third actual exhaust pressure of the first compressor in the process that the second compressor in the high-temperature refrigeration cycle operates at the second preset frequency until the third actual exhaust pressure is determined to be in the preset exhaust pressure range.

In this embodiment, the control of the low-temperature refrigeration cycle to be turned on specifically includes:

and controlling the low-temperature refrigeration cycle loop to be started at a third preset frequency, wherein the third preset frequency is used for representing the frequency corresponding to the low-frequency mode of the first compressor.

Specifically, a plurality of operation modes corresponding to the first compressor and frequencies corresponding to the operation modes may be preset, and when the low-temperature refrigeration cycle loop is controlled to be started, the corresponding relationship may be queried to obtain a third preset frequency corresponding to the low-frequency mode from the corresponding relationship. In the embodiment, the first compressor in the low-temperature refrigeration cycle is controlled to be started at a lower frequency so as to determine that the condensation temperature does not exceed the limit value, and the phenomenon that the compressor is jumped due to the excessively high discharge pressure is prevented.

When the low-temperature refrigeration cycle is determined to be required to be started, the control pipe control piece is closed so as to switch off the condensation pipe, the bypass pipe and the air return pipe and switch off the condensation pipe, the throttle pipe and the air return pipe.

S203: after the low-temperature refrigeration cycle is started, a first actual discharge pressure of a first compressor in the low-temperature refrigeration cycle is obtained.

In this embodiment, the method for obtaining the first actual exhaust pressure may refer to the above, and will not be described herein.

Specifically, the step S203 specifically includes:

and in the process from the frequency rising of the low-temperature refrigeration cycle loop to the fourth preset frequency, acquiring the first actual exhaust pressure of the first compressor in the low-temperature refrigeration cycle loop, wherein the fourth preset frequency is used for representing the highest frequency which can be achieved by the first compressor.

In this embodiment, after the low-temperature refrigeration cycle loop is turned on, the low-temperature refrigeration cycle loop may be increased to a fourth preset frequency according to the set frequency increasing rate, so that the high-temperature refrigeration cycle loop operates according to the fourth preset frequency, so as to rapidly perform refrigeration under the combined action of the low-temperature refrigeration cycle loop and the high-temperature refrigeration cycle loop. The fourth preset frequency can be set according to actual needs, and the specific value of the fourth preset frequency is not limited in this embodiment. In the process from the frequency rising of the low-temperature refrigeration cycle loop to the fourth preset frequency, a step of obtaining the first actual exhaust pressure of the first compressor in the low-temperature refrigeration cycle loop can be executed, so that when the exhaust pressure of the first compressor is too high, the control element of the control pipeline works, the condensation pipeline, the throttling pipeline and the air return pipeline are conducted, the pressure of the first compressor is relieved, the exhaust pressure of the first compressor is reduced, and the first compressor is prevented from tripping. When the first actual exhaust pressure of the first compressor is not too high, the control pipeline control part does not work, so that the condensing pipeline, the throttling pipeline and the air return pipeline are shut off, the condensing pipeline, the bypass pipeline and the air return pipeline are shut off, and the low-temperature refrigeration cycle loop is continuously controlled to be increased to a fourth preset frequency.

S204: it is determined whether the first actual discharge pressure is greater than a preset discharge pressure that characterizes a discharge pressure of the first compressor required for communication between the condensing line, the throttling line, and the return line.

S205: when the first actual exhaust pressure is greater than the preset exhaust pressure, the control pipe control piece works so as to conduct the condensation pipe, the throttling pipe and the air return pipe.

For the steps S204 and S205, the preset exhaust pressure may be set according to actual needs, and the specific value of the preset exhaust pressure is not limited in this embodiment. When the first actual exhaust pressure is larger than the preset exhaust pressure, the exhaust pressure of the first compressor is too high, and if the first compressor is not processed, the first compressor can jump due to the fact that the exhaust pressure of the first compressor is too high, and the refrigerating efficiency of a refrigerating system is affected. And when the first actual exhaust pressure is smaller than or equal to the preset exhaust pressure, the step of controlling the low-temperature refrigeration cycle loop to rise to the fourth preset frequency can be continuously executed, wherein the step of indicating that the current exhaust pressure of the first compressor is not too high, and the control pipe control piece does not work.

In this embodiment, after the step S205 is performed, the control method of the refrigeration system provided in this embodiment further includes the following steps:

acquiring a second actual discharge pressure of the first compressor;

when the second actual exhaust pressure is within the preset exhaust pressure range, the control pipe control piece is closed, so that the condensing pipe, the throttling pipe and the air return pipe are closed.

The second actual exhaust pressure obtaining manner is consistent with the first actual exhaust pressure obtaining manner, and specific reference may be made to the above description, which is not repeated herein in this embodiment. In order to avoid excessive pressure relief of the first compressor and influence the refrigerating efficiency of the whole refrigerating system, the second actual exhaust pressure of the first compressor is detected in real time in the conduction process of the condensing pipeline, the throttling pipeline and the air return pipeline, so that when the second actual exhaust pressure is in a preset exhaust pressure range, the control part of the control pipeline is closed, and the condensing pipeline, the throttling pipeline and the air return pipeline are closed, so that excessive pressure relief of the throttling pipeline to the first compressor is avoided. When the refrigeration system further includes a bypass line, the control line control element is closed, and the condensation line, the bypass line, and the return line are also closed.

According to the control method of the refrigerating system, provided by the embodiment, after the low-temperature refrigerating circulation loop is started, the exhaust pressure of the first compressor in the low-temperature refrigerating circulation loop is detected in real time, and the pipeline control piece is controlled according to the exhaust pressure condition of the first compressor, so that when the exhaust pressure of the first compressor is too high, the pressure can be relieved through the throttling pipeline, the phenomenon that the refrigerating efficiency of the refrigerating system and the service life of the first compressor jump due to the fact that the exhaust pressure of the first compressor is too high in the starting process of the low-temperature refrigerating circulation loop is avoided.

Referring to fig. 3, a schematic flow chart of a control method of a refrigeration system is specifically described, which specifically includes:

the refrigeration system is powered on to refrigerate and draw temperature, a second compressor in the high-temperature refrigeration circulation loop is started at a first preset frequency, and a control pipe control piece works to conduct among the condensation pipe, the bypass pipe and the air return pipe and to switch off among the condensation pipe, the throttle pipe and the air return pipe, so that the refrigerant in the air return pipe is introduced into the condensation pipe through the bypass pipe, and the condensation side of the evaporative condenser condenses the refrigerant in the condensation pipe. After the second compressor is started at the first preset frequency, the second compressor is controlled to be increased to the second preset frequency, and the second compressor is controlled to run at the second preset frequency. And acquiring a third actual discharge pressure of the first compressor in the low-temperature refrigeration cycle loop during the operation of the second compressor at the second preset frequency. When the third actual exhaust pressure is within the preset exhaust pressure range, the control pipe control piece is closed, so that the condensation pipe, the bypass pipe and the air return pipe are closed, and the first compressor in the low-temperature refrigeration cycle loop is closed and controlled to be opened at a third preset frequency. After the first compressor is started at a third preset frequency, and in the process of controlling the first compressor to rise to a fourth preset frequency, the first actual exhaust pressure of the first compressor is obtained, and when the first actual exhaust pressure is greater than the preset exhaust pressure, the control piece of the control pipeline works so as to conduct among the condensation pipeline, the throttling pipeline and the air return pipeline and to cut off among the condensation pipeline, the bypass pipeline and the air return pipeline. And after the condensation pipeline, the throttling pipeline and the return air pipeline are communicated, obtaining the second actual exhaust pressure of the first compressor. When the second actual exhaust pressure is within the preset exhaust pressure range, the control pipe control piece is closed, so that the condensing pipe, the throttling pipe and the air return pipe are closed, and the first compressor is continuously controlled to be increased to a second preset frequency. When the first actual discharge pressure is less than or equal to the preset discharge pressure, the first compressor can be continuously controlled to be increased to a second preset frequency.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a control device of a refrigeration system according to an embodiment of the present application. The control device of the refrigerating system comprises a control module 10 and an acquisition module 20, wherein the refrigerating system comprises a high-temperature refrigerating circulation loop, a low-temperature refrigerating circulation loop and a throttle pipeline, the low-temperature refrigerating circulation loop comprises a condensation pipeline and an air return pipeline, one end of the throttle pipeline is connected with the condensation pipeline, the other end of the throttle pipeline is connected with the air return pipeline, and a pipeline control part is arranged at the joint of the throttle pipeline and the condensation pipeline; the control module 10 is used for controlling the high-temperature refrigeration cycle loop to be started after the refrigeration system is powered on; the control module 10 is further configured to control, after the high-temperature refrigeration cycle is started, the low-temperature refrigeration cycle to be started if it is determined that the low-temperature refrigeration cycle is required to be started; an acquisition module 20, configured to acquire a first actual discharge pressure of a first compressor in the low-temperature refrigeration cycle after the low-temperature refrigeration cycle is started; the control module 10 is further configured to control the pipe control according to the first actual exhaust pressure.

In the present embodiment, the control module 10 is further configured to:

controlling the pipeline control part to work so as to obtain the second actual exhaust pressure of the first compressor after the condensation pipeline, the throttling pipeline and the return air pipeline are conducted;

The control device of a refrigeration system provided in this embodiment further includes: the determining module is used for:

In this embodiment, the refrigeration system further includes a bypass line, one end of the bypass line is connected to the line control member, the other end of the bypass line is connected to the return line, the bypass line is used for introducing the refrigerant in the return line to the condensation line, the high-temperature refrigeration cycle loop and the low-temperature refrigeration cycle loop are coupled through an evaporation condenser, and a condensation side of the evaporation condenser is disposed in the condensation line.

In the present embodiment, the control module 10 is further configured to:

and controlling the low-temperature refrigeration cycle loop to be started at a third preset frequency, wherein the third preset frequency is used for representing a frequency corresponding to a low-frequency mode of the first compressor.

In this embodiment, the obtaining module 20 is further configured to:

And in the process of raising the frequency of the low-temperature refrigeration cycle loop to a fourth preset frequency, acquiring the first actual exhaust pressure of the first compressor in the low-temperature refrigeration cycle loop, wherein the fourth preset frequency is used for representing the highest frequency which can be achieved by the first compressor.

According to the control device of the refrigerating system, the throttle pipeline is arranged to detect the exhaust pressure of the first compressor in the low-temperature refrigerating circulation loop in real time after the low-temperature refrigerating circulation loop is started, so that the pipeline control piece is controlled according to the exhaust pressure condition of the first compressor, so that when the exhaust pressure of the first compressor is too high, the pressure can be relieved through the throttle pipeline, the phenomenon that the refrigerating efficiency of the refrigerating system and the service life of the first compressor jump due to the fact that the exhaust pressure of the first compressor is too high in the starting process of the low-temperature refrigerating circulation loop is avoided, and the refrigerating efficiency of the refrigerating system is improved.

Fig. 6 is a schematic structural diagram of another refrigeration system according to an embodiment of the present invention, and the refrigeration system 600 shown in fig. 6 includes: at least one processor 601, memory 602, at least one network interface 604, and other user interfaces 603. The various components in the refrigeration system 600 are coupled together by a bus system 605. It is understood that the bus system 605 is used to enable connected communications between these components. The bus system 605 includes a power bus, a control bus, and a status signal bus in addition to a data bus. But for clarity of illustration the various buses are labeled as bus system 605 in fig. 6.

The user interface 603 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, a trackball, a touch pad, or a touch screen, etc.).

It is to be appreciated that the memory 602 in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and Direct memory bus RAM (DRRAM). The memory 602 described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In some implementations, the memory 602 stores the following elements, executable units or data structures, or a subset thereof, or an extended set thereof: an operating system 6021 and application programs 6022.

The operating system 6021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application 6022 includes various application programs such as a Media Player (Media Player), a Browser (Browser), and the like for realizing various application services. The program for implementing the method of the embodiment of the present invention may be included in the application 6022.

In the embodiment of the present invention, the processor 601 is configured to execute the method steps provided by the method embodiments by calling a program or an instruction stored in the memory 602, specifically, a program or an instruction stored in the application 6022, for example, including: after the refrigerating system is electrified, the high-temperature refrigerating circulation loop is controlled to be started; after the high-temperature refrigeration cycle loop is started, if the low-temperature refrigeration cycle loop is determined to be started, controlling the low-temperature refrigeration cycle loop to be started; after the low-temperature refrigeration cycle loop is started, acquiring a first actual exhaust pressure of a first compressor in the low-temperature refrigeration cycle loop; the pipe control is controlled in accordance with the first actual exhaust pressure.

The method disclosed in the above embodiment of the present invention may be applied to the processor 601 or implemented by the processor 601. The processor 601 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in the processor 601 or instructions in the form of software. The processor 601 may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software elements in a decoding processor. The software elements may be located in a random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory 602, and the processor 601 reads information in the memory 602 and performs the steps of the above method in combination with its hardware.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For a hardware implementation, the processing units may be implemented within one or more application specific integrated circuits (Application Specific Integrated Circuits, ASIC), digital signal processors (Digital Signal Processing, DSP), digital signal processing devices (dspev, DSPD), programmable logic devices (Programmable Logic Device, PLD), field programmable gate arrays (Field-Programmable Gate Array, FPGA), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.

For a software implementation, the techniques described herein may be implemented by means of units that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

The refrigeration system provided in this embodiment may be a refrigeration system as shown in fig. 6, and may perform all steps of the control method of the refrigeration system as shown in fig. 1-3, so as to achieve the technical effects of the control method of the refrigeration system as shown in fig. 1-3, and the description is specifically referred to in fig. 1-3, and is omitted herein for brevity.

The embodiment of the invention also provides a storage medium (computer readable storage medium). The storage medium here stores one or more programs. Wherein the storage medium may comprise volatile memory, such as random access memory; the memory may also include non-volatile memory, such as read-only memory, flash memory, hard disk, or solid state disk; the memory may also comprise a combination of the above types of memories.

When one or more programs in the storage medium are executable by one or more processors, the control method of the refrigeration system executed on the control device side of the refrigeration system is implemented.

The processor is configured to execute a control program of the refrigeration system stored in the memory, so as to implement the following steps of a control method of the refrigeration system executed on a control device side of the refrigeration system: after the refrigerating system is electrified, the high-temperature refrigerating circulation loop is controlled to be started; after the high-temperature refrigeration cycle loop is started, if the low-temperature refrigeration cycle loop is determined to be started, controlling the low-temperature refrigeration cycle loop to be started; after the low-temperature refrigeration cycle loop is started, acquiring a first actual exhaust pressure of a first compressor in the low-temperature refrigeration cycle loop; the pipe control is controlled in accordance with the first actual exhaust pressure.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of function in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims

1. The utility model provides a control method of refrigerating system, characterized by, refrigerating system includes high temperature refrigeration cycle loop, low temperature refrigeration cycle loop, choke line and bypass line, low temperature refrigeration cycle loop includes condensation pipeline and return air pipeline, the one end of choke line with the condensation pipeline is connected, the other end of choke line with return air pipeline is connected, the throttle line with the junction of condensation pipeline is provided with the pipeline control piece, the one end of bypass line with pipeline control piece is connected, the other end of bypass line with return air pipeline is connected, the bypass line is used for introducing refrigerant in the return air pipeline to the condensation pipeline, high temperature refrigeration cycle loop with couple through the evaporation condenser between the low temperature refrigeration cycle loop, the condensation side of evaporation condenser sets up in the condensation pipeline, the method includes:

after the refrigerating system is electrified, controlling the high-temperature refrigerating circulation loop to be started and controlling a pipeline control member to work so as to introduce the refrigerant in the air return pipeline into the condensing pipeline through the bypass pipeline, so that the condensing side of the evaporative condenser condenses the refrigerant in the condensing pipeline;

controlling the pipe control according to the first actual exhaust pressure, including: determining whether the first actual discharge pressure is greater than a preset discharge pressure that characterizes a discharge pressure of the first compressor required for conduction between the condensing line, the throttling line, and the return line;

2. The method of claim 1, wherein after performing the step of controlling operation of the line control to cause communication between the condensing line, the throttling line, and the return line, the method further comprises:

acquiring a second actual discharge pressure of the first compressor;

3. The method of claim 1, wherein the determining that the low temperature refrigeration cycle is to be turned on comprises:

4. The method of claim 1, wherein said controlling the high temperature refrigeration cycle to open comprises:

5. The method of claim 1, wherein said controlling the low temperature refrigeration cycle to be on comprises:

6. The utility model provides a refrigerating system's controlling means, its characterized in that, refrigerating system includes high temperature refrigeration cycle loop, low temperature refrigeration cycle loop, choke line and bypass line, low temperature refrigeration cycle loop includes condensation pipeline and return air pipeline, the one end of choke line with the condensation pipeline is connected, the other end of choke line with return air pipeline is connected, the choke line with the junction of condensation pipeline is provided with the pipeline control piece, the one end of bypass line with the pipeline control piece is connected, the other end of bypass line with return air pipeline is connected, the bypass line is used for introducing refrigerant in the return air pipeline to the condensation pipeline, high temperature refrigeration cycle loop with pass through the evaporation condenser coupling between the low temperature refrigeration cycle loop, the condensation side of evaporation condenser set up in the condensation pipeline, the device includes:

The control module is used for controlling the high-temperature refrigeration cycle loop to be started and controlling the pipeline control piece to work after the refrigeration system is electrified so as to introduce the refrigerant in the air return pipeline into the condensation pipeline through the bypass pipeline, so that the condensation side of the evaporative condenser condenses the refrigerant in the condensation pipeline;

the control module is further used for controlling the pipeline control piece according to the first actual exhaust pressure;

the control module is further configured to determine whether the first actual exhaust pressure is greater than a preset exhaust pressure, where the preset exhaust pressure is used to characterize an exhaust pressure of the first compressor required for conduction among the condensation line, the throttling line, and the return air line;

7. A refrigeration system, comprising: the device comprises a high-temperature refrigeration cycle loop, a low-temperature refrigeration cycle loop, a throttle pipeline, a bypass pipeline, a processor and a memory;

the low-temperature refrigeration cycle loop comprises a condensation pipeline and an air return pipeline, one end of a throttle pipeline is connected with the condensation pipeline, the other end of the throttle pipeline is connected with the air return pipeline, a pipeline control piece is arranged at the joint of the throttle pipeline and the condensation pipeline, one end of a bypass pipeline is connected with the pipeline control piece, the other end of the bypass pipeline is connected with the air return pipeline, the bypass pipeline is used for introducing refrigerant in the air return pipeline into the condensation pipeline, the high-temperature refrigeration cycle loop and the low-temperature refrigeration cycle loop are coupled through an evaporation condenser, the condensation side of the evaporation condenser is arranged in the condensation pipeline, and the processor is connected with the high-temperature refrigeration cycle loop, the low-temperature refrigeration cycle loop, the pipeline control piece and the memory;

the processor is configured to execute a control program of the refrigeration system stored in the memory, so as to implement the control method of the refrigeration system according to any one of claims 1 to 5.

8. A storage medium storing one or more programs executable by one or more processors to implement the method of controlling a refrigeration system according to any one of claims 1 to 5.