CN111854207A

CN111854207A - Refrigerator equipment, refrigerating system and control method of refrigerating system

Info

Publication number: CN111854207A
Application number: CN201910348364.1A
Authority: CN
Inventors: 田红荀; 房雯雯; 梁静娜
Original assignee: Qingdao Haier Co Ltd; Qingdao Haier Smart Technology R&D Co Ltd
Current assignee: Qingdao Haier Co Ltd; Qingdao Haier Smart Technology R&D Co Ltd
Priority date: 2019-04-28
Filing date: 2019-04-28
Publication date: 2020-10-30

Abstract

The application relates to a refrigerator device, a refrigeration system and a control method thereof. The refrigeration system comprises a refrigerant circulation loop formed by connecting a condenser, an evaporator, a compressor and a throttling device, and also comprises a heat regenerator, and the control method comprises the following steps: when the refrigeration system needs to be started and the throttling device is initially closed by default, the compressor is controlled to be started; the method comprises the steps of obtaining the superheat degree of a refrigerant at one or more low-pressure detection positions of a refrigerating system, wherein the one or more low-pressure detection positions comprise an evaporator, a second regenerative cavity of the regenerator, a first refrigerant sub-pipe section of which the evaporator is connected with the second regenerative cavity, and a second refrigerant sub-pipe section of which the compressor is connected with the second regenerative cavity; and controlling to open the throttling device in response to the refrigerant superheat degree of one or more low-pressure detection positions of the refrigerating system meeting a preset superheat degree condition. The control method of the refrigeration system can effectively reduce the cold loss of part of refrigerants in the starting process of the refrigeration system, and guarantees the stability and the safety of the overall operation of the refrigeration system.

Description

Refrigerator equipment, refrigerating system and control method of refrigerating system

Technical Field

The present application relates to the field of refrigeration equipment, and for example, to a refrigerator device, a refrigeration system, and a control method thereof.

Background

The electronic expansion valve is a throttling element which can adjust the flow of a refrigerant of a refrigerating device according to a preset program, and is commonly used for controlling the throttling of the flow of the refrigerant of refrigerating equipment such as a refrigerator, an air conditioner and the like; especially, in some occasions with severe load change or wider operation condition range in the operation process of refrigeration equipment, the traditional throttling elements (such as capillary tubes, thermal expansion valves and the like) can not meet the requirements of comfort and energy conservation, and the electronic expansion valve is more and more widely applied as a throttling element with more comprehensive functions.

The electronic expansion valve has the advantages of high response and action speed, generally, the electronic expansion valve only needs a few seconds from a fully closed state to a fully opened state, and the opening and closing characteristics and the speed can be set manually; the electronic expansion valve can be accurately adjusted within the range of 10% -100%, and the adjustment range can be set according to the actual working requirements of different refrigeration equipment products.

For the existing refrigeration equipment applying the electronic expansion valve, when the refrigeration equipment needs to be started, the electronic expansion valve is quickly opened to a preset opening degree after a compressor is started, so that the flow is easily generated in the electronic expansion valve immediately after the compressor is started, but because a large amount of refrigerant is always stored in a heat exchanger at the moment, the actual temperature of the refrigerant flowing back to an air suction pipeline of the compressor through the heat exchanger is very low, the cold energy of the refrigerant is sacrificed, and the energy consumption loss of the refrigeration equipment is invisibly increased.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

According to one aspect of the disclosed embodiments, a method of controlling a refrigeration system is provided.

In some optional embodiments, the refrigeration system comprises a refrigerant circulation loop mainly formed by connecting a condenser for exchanging heat to the outside, an evaporator for exchanging heat to the inside, a compressor and a throttling device, and the refrigeration system further comprises a heat regenerator, wherein a first heat recovery cavity of the heat regenerator is connected in series with a refrigerant pipe section between the condenser and the throttling device, and a second heat recovery cavity of the heat regenerator is connected in series with a refrigerant pipe section between the evaporator and the compressor;

the control method comprises the following steps:

when the refrigeration system needs to be started and the throttling device is initially closed by default, the compressor is controlled to be started;

the method comprises the steps of obtaining the superheat degree of a refrigerant at one or more low-pressure detection positions of a refrigerating system, wherein the one or more low-pressure detection positions comprise an evaporator, a second regenerative cavity of the regenerator, a first refrigerant sub-pipe section of which the evaporator is connected with the second regenerative cavity, and a second refrigerant sub-pipe section of which the compressor is connected with the second regenerative cavity;

And controlling to open the throttling device in response to the refrigerant superheat degree of one or more low-pressure detection positions of the refrigerating system meeting a preset superheat degree condition.

In an alternative embodiment, obtaining refrigerant superheat at one or more low pressure sensing locations in a refrigerant system comprises: acquiring the superheat degree of a refrigerant at a refrigerant outlet of an evaporator;

the control method comprises the following steps: and if the refrigerant superheat degree of the refrigerant outlet of the evaporator reaches a preset first refrigerant superheat degree threshold value, determining that a preset superheat degree condition is met.

In an alternative embodiment, obtaining refrigerant superheat at one or more low pressure sensing locations in a refrigerant system comprises: acquiring the refrigerant superheat degree of an intermediate refrigerant of an evaporator;

the control method comprises the following steps: and if the refrigerant superheat degree of the intermediate refrigerant of the evaporator reaches a preset second refrigerant superheat degree threshold value, determining that a preset superheat degree condition is met.

In an alternative embodiment, obtaining refrigerant superheat at one or more low pressure sensing locations in a refrigerant system comprises: acquiring the superheat degree of a refrigerant of a second regenerative cavity of the regenerator;

the control method comprises the following steps: and if the superheat degree of the refrigerant in the second regenerative cavity of the heat regenerator reaches a preset third refrigerant superheat degree threshold value, determining that a preset superheat degree condition is met.

In an alternative embodiment, obtaining the superheat degree of the refrigerant of the second regenerative chamber of the regenerator includes: and obtaining the refrigerant superheat degree of the intermediate refrigerant of the second regenerative cavity of the regenerator.

In an alternative embodiment, if the compressor is a model with a preset low starting torque, before controlling to start the compressor, the control method further includes:

and controlling the throttling device to be closed after the throttling device is opened for a set time period at the maximum flow opening.

In accordance with another aspect of the disclosed embodiment, a refrigeration system is provided.

In some optional embodiments, the refrigeration system comprises a refrigerant circulation loop mainly formed by connecting a condenser for exchanging heat with the outside, an evaporator for exchanging heat with the inside, a compressor and a throttling device, and the refrigeration system further comprises a heat regenerator, wherein a first heat recovery cavity of the heat regenerator is connected in series with a refrigerant pipe section between the condenser and the throttling device, and a second heat recovery cavity is connected in series with a refrigerant pipe section between the evaporator and the compressor;

the refrigeration system further includes a controller for:

In an alternative embodiment, the controller is specifically configured to:

acquiring the superheat degree of a refrigerant at a refrigerant outlet of an evaporator; and

and if the refrigerant superheat degree of the refrigerant outlet of the evaporator reaches a preset first refrigerant superheat degree threshold value, determining that a preset superheat degree condition is met.

According to another aspect of embodiments of the present disclosure, a cooler apparatus is provided.

In some alternative embodiments, the freezer device has a refrigeration system as in any of the embodiments disclosed above.

Some technical solutions provided by the embodiments of the present disclosure can achieve the following technical effects:

according to the control method of the refrigeration system, when the compressor needs to be started, the compressor is preferentially controlled to be started to operate, and the control judgment of starting of the throttling device is carried out according to the superheat degree of the refrigerant at the low-pressure detection position; the refrigeration system can effectively reduce the cold loss of part of refrigerants in the starting process of the refrigeration system, and the stability and the safety of the overall operation of the refrigeration system are ensured.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic flow chart diagram of a method of controlling a refrigeration system provided by an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a refrigeration system provided by an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a refrigeration system provided by an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of an electronic device provided in an embodiment of the present disclosure.

Reference numerals:

1. a freezer device; 11. a refrigeration system; 111. a condenser; 112. an evaporator; 13. a controller; 14. a throttling device; 15. a compressor; 16. a heat regenerator; 161. a first heat recovery cavity; 162. a second regenerative chamber; 400. a processor; 401. a memory; 402. a communication interface; 403. a bus.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

In the embodiment of the present application, when the refrigeration system 11 needs to be started, the control method preferentially controls the compressor 15 to start and operate, and performs control and judgment on the opening of the throttle devices 14 such as the electronic expansion valve according to the superheat degrees of the refrigerants at the low-pressure detection positions, such as the evaporator 112, the second regenerative cavity 162 of the regenerator, and the first refrigerant sub-pipe section where the evaporator 112 is connected to the second regenerative cavity 162, or the second refrigerant sub-pipe section where the compressor 15 is connected to the second regenerative cavity 162; the refrigeration capacity loss of part of refrigerants in the starting process of the refrigeration system 11 can be effectively reduced, and the stability and the safety of the overall operation of the refrigeration system 11 are ensured.

In some optional embodiments, a control method of a refrigeration system 11 is provided, the refrigeration system 11 includes a refrigerant circulation loop mainly formed by connecting a condenser 111 for exchanging heat with the outside, an evaporator 112 for exchanging heat with the inside, a compressor 15 and a throttling device 14, the refrigeration system 11 further includes a heat regenerator 16, wherein a first heat recovery chamber 161 of the heat regenerator is connected in series with a refrigerant pipe section between the condenser 111 and the throttling device 14, and a second heat recovery chamber 162 of the heat regenerator is connected in series with a refrigerant pipe section between the evaporator 112 and the compressor 15; the control method comprises the following steps: when the refrigeration system 11 needs to be started and the throttling device 14 is initially closed by default, the compressor 15 is controlled to be started; acquiring the superheat degree of a refrigerant at one or more low-pressure detection positions of the refrigeration system 11; and controlling to open the throttling device 14 in response to the refrigerant superheat degree of one or more low-pressure detection positions of the refrigeration system 11 meeting a preset superheat degree condition.

Herein, regenerator 16 includes a first regenerative chamber 161 and a second regenerative chamber 162. The first heat recovery chamber 161 of the heat regenerator is connected in series with the refrigerant pipe section between the condenser 111 and the throttle device 14, and the second heat recovery chamber 162 of the heat regenerator is connected in series with the refrigerant pipe between the evaporator 112 and the compressor 15.

In some embodiments, in the case where the refrigeration system is applied to an air conditioning apparatus, the condenser 111 is a heat exchanger for exchanging heat between the refrigeration system 11 and the outdoor environment; the evaporator 112 is a heat exchanger for exchanging heat between the refrigeration system 11 and the indoor environment; under the condition that the refrigeration system is applied to the refrigerator equipment, the condenser 111 is a heat exchanger for exchanging heat between the refrigeration system 11 and the environment outside the refrigerator equipment shell; the evaporator 112 is a heat exchanger for exchanging heat between the refrigeration system 11 and the refrigerated environment within the freezer housing.

FIG. 1 is a flow chart diagram illustrating a method of controlling a refrigeration system 11 of the present application according to an exemplary embodiment.

As shown in fig. 1, the present application provides a control method of a refrigeration system 11, which, when starting up, preferentially controls a compressor 15 to start up, and performs control judgment of opening a throttle device 14 such as an electronic expansion valve according to a superheat degree of a refrigerant at a low-pressure detection position; the refrigeration capacity loss of part of refrigerants in the starting process of the refrigeration system 11 can be effectively reduced, and the stability and the safety of the overall operation of the refrigeration system 11 are ensured. Specifically, the control method mainly comprises the following steps:

S1, controlling to start the compressor 15 under the conditions that the refrigeration system 11 needs to be started and the throttling device 14 is initially closed by default;

optionally, in the refrigeration system 11, in order to effectively reduce the loss of cooling capacity of a part of refrigerant in the starting process of the refrigeration system 11, when the refrigeration system 11 needs to be started, the compressor 15 is controlled to be started first, and the throttling device 14 is not started at the same time, and after the following control steps are completed, the throttling device 14 of the refrigeration system 11 is started after the starting condition of the throttling device 14 is met.

Here, the low pressure section of the refrigerant pipeline includes a refrigerant outlet pipeline of the throttling device 14, a refrigerant pipeline of the evaporator 112, and a refrigerant pipeline between the evaporator 112 and the compressor 15, the refrigeration system 11 of the present application further includes a heat regenerator 16, and an intermediate refrigerant pipeline of the second regenerative cavity 162 of the heat regenerator, a refrigerant pipeline connecting the evaporator 112 and the second regenerative cavity 162 of the heat regenerator, and a refrigerant pipeline connecting the compressor 15 and the second regenerative cavity 162 of the heat regenerator are also low pressure sections of the refrigerant pipeline.

S2, obtaining the superheat degree of the refrigerant at one or more low-pressure detection positions of the refrigeration system 11;

the one or more low-pressure detection positions include the evaporator 112, the second regenerative chamber 162 of the regenerator, a first refrigerant sub-segment where the evaporator 112 is connected to the second regenerative chamber 162, and a second refrigerant sub-segment where the compressor 15 is connected to the second regenerative chamber 162.

Optionally, the low-pressure section of the refrigerant pipeline may serve as a low-pressure detection position.

In the embodiment of the present disclosure, the refrigerant pipeline of the refrigeration system 11 includes a first refrigerant sub-pipe section and a second refrigerant sub-pipe section, where the first refrigerant sub-pipe section is the refrigerant pipeline connecting the evaporator 112 and the second regenerative chamber 162; the second refrigerant sub-segment refers to a refrigerant pipeline connecting the compressor 15 and the second regenerative chamber 162.

Optionally, the one or more low pressure detection positions include the evaporator 112, a second regenerative chamber 162 of the regenerator, a first refrigerant sub-section where the evaporator 112 is connected to the second regenerative chamber 162, or a second refrigerant sub-section where the compressor 15 is connected to the second regenerative chamber 162; the refrigerant superheat at the one or more low-voltage detection positions may include a refrigerant superheat at a refrigerant inlet of the evaporator 112, a refrigerant superheat at a refrigerant outlet of the evaporator 112, a refrigerant superheat at an intermediate refrigerant of the evaporator 112, a refrigerant superheat at a refrigerant inlet of the second regenerative chamber 162 of the regenerator, a refrigerant superheat at an intermediate refrigerant of the second regenerative chamber 162 of the regenerator, a refrigerant superheat at a refrigerant outlet of the second regenerative chamber 162 of the regenerator, a refrigerant superheat at a first refrigerant sub-tube segment of the second regenerative chamber 162 of the evaporator 112 connected to the regenerator, and a refrigerant superheat at a second refrigerant sub-tube segment of the second regenerative chamber 162 of the compressor 15 connected to the regenerator.

Alternatively, the superheat of the refrigerant at the refrigerant outlet of the evaporator 112 refers to a difference between a superheat temperature and a saturation temperature of the refrigerant outlet in the pipeline of the evaporator 112 at the same evaporation pressure, that is, an absolute value obtained by subtracting an actual temperature of the refrigerant detected at the refrigerant outlet of the evaporator 112 from a saturation temperature of the refrigerant outlet of the evaporator 112.

Alternatively, the refrigerant superheat of the intermediate refrigerant in the evaporator 112 is the difference between the superheat temperature and the saturation temperature of the intermediate refrigerant in the evaporator 112 at the same evaporation pressure, that is, the absolute value obtained by subtracting the actual temperature of the intermediate refrigerant in the evaporator 112 detected by the temperature sensor from the saturation temperature of the intermediate refrigerant in the evaporator 112.

Here, the actual temperature of the refrigerant in the refrigerant pipe may be realized by detecting a position in the refrigerant pipe and disposing a temperature sensor.

Alternatively, the superheat of the refrigerant in the evaporator 112 may be calculated by roughly subtracting the temperature of the intermediate refrigerant in the evaporator 112 from the temperature of the refrigerant detected by a temperature sensor in the line at the refrigerant outlet of the evaporator 112.

Alternatively, the refrigerant superheat of the intermediate refrigerant in the second regenerative chamber 162 of the regenerator may be calculated by subtracting the refrigerant temperature detected by the temperature sensor in the pipeline from the refrigerant saturation temperature of the intermediate refrigerant in the second regenerative chamber 162 of the regenerator.

Alternatively, the refrigerant superheat at the refrigerant outlet of the second regenerative chamber 162 of the regenerator may be calculated by subtracting the refrigerant temperature detected by the temperature sensor in the pipeline from the saturation temperature at the refrigerant outlet of the second regenerative chamber 162 of the regenerator.

And S3, controlling the throttle device 14 to be opened in response to the refrigerant superheat degree at one or more low-pressure detection positions of the refrigeration system 11 meeting a preset superheat degree condition.

Optionally, the preset superheat condition may be a preset refrigerant superheat threshold, when the controller 13 detects the superheat of the refrigerant at one or more low-pressure detection positions of the refrigerant system, the detected superheat of the refrigerant is compared with the preset refrigerant superheat threshold at the position, when the controller 13 detects that the superheat of the refrigerant at the low-pressure detection position reaches the preset refrigerant superheat threshold, the preset superheat condition is met, it is described that the refrigerant flow at the low-pressure section of the refrigerant pipeline reaches the opening condition of the throttling device 14, and at this time, the throttling device 14 may be controlled to be opened.

Optionally, the controller 13 controls to open the throttling device 14 when detecting that the superheat degree of the refrigerant at one or more low-pressure detection positions of the refrigeration system 11 meets a preset superheat degree condition, where the preset superheat condition may be a superheat degree threshold of the refrigerant that can meet the requirement that the refrigeration system 11 controls to open the throttling device 14 without causing a large amount of cooling loss in the system starting process.

Thus, when the compressor needs to be started, the compressor 15 is preferentially controlled to be started, and the control judgment of the opening of the throttling device 14 such as an electronic expansion valve is carried out according to the superheat degree of the refrigerant at the low-pressure detection position; the refrigeration capacity loss of part of refrigerants in the starting process of the refrigeration system 11 can be effectively reduced, and the stability and the safety of the overall operation of the refrigeration system 11 are ensured.

Optionally, obtaining the superheat of the refrigerant at one or more low-pressure detection positions of the refrigeration system 11 includes: obtaining the superheat degree of the refrigerant at the refrigerant outlet of the evaporator 112; the control method comprises the following steps: if the refrigerant superheat degree of the refrigerant outlet of the evaporator 112 reaches a preset first refrigerant superheat degree threshold value, it is determined that a preset superheat degree condition is satisfied.

Optionally, the obtaining of the refrigerant superheat degree of the low-pressure detection position according to any optional embodiment includes obtaining a refrigerant superheat degree of a refrigerant outlet of the evaporator 112, comparing the obtained refrigerant superheat degree of the refrigerant outlet of the evaporator 112 with a preset first refrigerant superheat degree threshold, if the obtained refrigerant superheat degree of the refrigerant outlet of the evaporator 112 is inconsistent with the preset first refrigerant degree threshold, that is, the refrigerant superheat degree of the refrigerant outlet of the evaporator 112 does not satisfy the preset superheat degree condition, temporarily not opening the throttle device 14, and continuously detecting the refrigerant outlet refrigerant superheat degree of the evaporator 112 until the refrigerant superheat degree of the refrigerant outlet of the evaporator 112 is consistent with the preset first refrigerant superheat degree threshold, and the refrigerant superheat degree of the refrigerant outlet of the evaporator 112 satisfies the preset superheat degree condition.

Thus, when the compressor needs to be started, the compressor 15 is preferentially controlled to be started, and the control judgment of the opening of the throttling device 14 such as an electronic expansion valve is carried out according to the superheat degree of the refrigerant at the refrigerant outlet of the evaporator 112; the refrigeration capacity loss of part of refrigerants in the starting process of the refrigeration system 11 can be effectively reduced, and the stability and the safety of the overall operation of the refrigeration system 11 are ensured.

Optionally, obtaining the superheat of the refrigerant at one or more low-pressure detection positions of the refrigeration system 11 includes: obtaining the refrigerant superheat degree of the intermediate refrigerant of the evaporator 112; the control method comprises the following steps: and if the refrigerant superheat degree of the intermediate refrigerant of the evaporator 112 reaches the preset second refrigerant superheat degree threshold value, determining that the preset superheat degree condition is met.

Optionally, the obtaining of the refrigerant superheat degree of the low-pressure detection position according to any optional embodiment includes obtaining a refrigerant superheat degree of an intermediate refrigerant of the evaporator 112, comparing the obtained refrigerant superheat degree of the intermediate refrigerant of the evaporator 112 with a preset second refrigerant superheat degree threshold, if the obtained refrigerant superheat degree of the intermediate refrigerant of the evaporator 112 is inconsistent with the preset second refrigerant superheat degree threshold, that is, the refrigerant superheat degree of the intermediate refrigerant of the evaporator 112 does not satisfy the preset superheat degree condition, temporarily not starting the throttle device 14, and continuously detecting the intermediate refrigerant superheat degree of the evaporator 112 until the refrigerant superheat degree of the intermediate refrigerant of the evaporator 112 is consistent with the preset second refrigerant superheat degree threshold, and the refrigerant superheat degree of the intermediate refrigerant of the evaporator 112 satisfies the preset superheat degree condition.

Thus, when the compressor needs to be started, the compressor 15 is preferentially controlled to be started, and the control judgment of the opening of the throttling device 14 such as an electronic expansion valve is carried out according to the refrigerant superheat degree of the intermediate refrigerant of the evaporator 112; the refrigeration capacity loss of part of refrigerants in the starting process of the refrigeration system 11 can be effectively reduced, and the stability and the safety of the overall operation of the refrigeration system 11 are ensured.

Optionally, obtaining the superheat of the refrigerant at one or more low-pressure detection positions of the refrigeration system 11 includes: obtaining the refrigerant superheat degree of the intermediate refrigerant of the second regenerative cavity 162 of the heat regenerator; the control method comprises the following steps: and if the superheat degree of the refrigerant in the second heat recovery cavity 162 of the heat regenerator reaches the preset third refrigerant superheat degree threshold value, determining that the preset superheat degree condition is met.

Optionally, obtaining the superheat of the refrigerant of the second regenerative chamber 162 of the regenerator includes: the refrigerant superheat of the intermediate refrigerant of the second regenerative chamber 162 of the regenerator is obtained.

Optionally, the obtaining of the superheat degree of the refrigerant at the low-pressure detection position according to any optional embodiment includes obtaining the superheat degree of the intermediate refrigerant in the second regenerative chamber 162 of the regenerator, comparing the obtained superheat degree of the intermediate refrigerant in the second regenerative chamber 162 of the regenerator with a preset third refrigerant superheat threshold value, if the obtained superheat degree of the intermediate refrigerant in the second regenerative chamber 162 of the regenerator is not consistent with the preset third refrigerant superheat threshold value, that is, the superheat degree of the intermediate refrigerant in the second regenerative cavity 162 of the regenerator does not satisfy the preset superheat degree condition, the throttle device 14 is not turned on for the moment, and the superheat degree of the intermediate refrigerant in the second regenerative cavity 162 of the regenerator is continuously detected until the superheat degree of the intermediate refrigerant in the second regenerative cavity 162 of the regenerator is consistent with the preset third refrigerant superheat degree threshold, and the superheat degree of the intermediate refrigerant in the second regenerative cavity 162 of the regenerator satisfies the preset superheat degree condition.

Thus, when the compressor needs to be started, the compressor 15 is preferentially controlled to be started, and the control judgment of the opening of the throttle devices 14 such as the electronic expansion valve is carried out according to the refrigerant superheat degree of the intermediate refrigerant of the second regenerative cavity 162 of the heat regenerator; the refrigeration capacity loss of part of refrigerants in the starting process of the refrigeration system 11 can be effectively reduced, and the stability and the safety of the overall operation of the refrigeration system 11 are ensured.

Optionally, obtaining the superheat of the refrigerant of the second regenerative chamber 162 of the regenerator includes: the superheat degree of the refrigerant at the refrigerant outlet of the second regenerative chamber 162 of the regenerator is obtained.

Optionally, the obtaining of the superheat degree of the refrigerant at the low-pressure detection position according to any optional embodiment includes obtaining the superheat degree of the refrigerant at the refrigerant outlet of the second regenerative cavity 162 of the regenerator, comparing the obtained superheat degree of the refrigerant at the refrigerant outlet of the second regenerative cavity 162 of the regenerator with a preset third refrigerant superheat threshold value, and if the obtained superheat degree of the refrigerant at the refrigerant outlet of the second regenerative cavity 162 of the regenerator is not consistent with the preset third refrigerant superheat threshold value, that is, the superheat degree of the refrigerant at the refrigerant outlet of the second regenerative cavity 162 of the regenerator does not satisfy the preset superheat degree condition, the throttle device 14 is not turned on for the moment, and the superheat degree of the refrigerant at the refrigerant outlet of the second regenerative cavity 162 of the regenerator is continuously detected until the superheat degree of the refrigerant at the refrigerant outlet of the second regenerative cavity 162 of the regenerator is consistent with the preset third refrigerant superheat degree threshold, and the superheat degree of the refrigerant at the refrigerant outlet of the second regenerative cavity 162 of the regenerator satisfies the preset superheat degree condition.

Thus, when the compressor needs to be started, the compressor 15 is preferentially controlled to be started, and the control judgment of the opening of the throttle device 14 such as an electronic expansion valve is carried out according to the superheat degree of the refrigerant at the refrigerant outlet of the second regenerative cavity 162 of the heat regenerator; the refrigeration capacity loss of part of refrigerants in the starting process of the refrigeration system 11 can be effectively reduced, and the stability and the safety of the overall operation of the refrigeration system 11 are ensured.

Optionally, if the compressor 15 is a model with a preset low starting torque, before controlling to start the compressor 15, the control method further includes: the control throttle device 14 is turned off after being turned on at the maximum flow opening for a set period of time.

The specification of the compressor 15 is not particularly limited, and the compressor 15 of the refrigeration system 11 may be a low-starting-torque compressor 15, and similarly, the set time period is not particularly limited, and may be selected according to the power of the compressor 15, and the power of the compressor 15 is 155 watt-hours, and the set time period may be 30 seconds.

Optionally, the compressor 15 of the refrigeration system 11 is a model with a low starting torque, before the refrigeration system 11 is started, the electronic expansion valve is first adjusted to the maximum opening degree, the electronic expansion valve is closed again, then the compressor 15 is started to be in a working state, and when a preset time delay is reached, the electronic expansion valve is started again.

Thus, when the compressor needs to be started, the compressor 15 is preferentially controlled to be started, and the control judgment of the opening of the throttling device 14 such as an electronic expansion valve is carried out according to the superheat degree of the refrigerant at the low-pressure detection position such as the evaporator 112 or the heat regenerator; the refrigeration capacity loss of part of refrigerants in the starting process of the refrigeration system 11 can be effectively reduced, and the stability and the safety of the overall operation of the refrigeration system 11 are ensured.

The embodiment of the present application further provides a refrigeration system 11, and a control method adopted by the refrigeration system 11 may be the control method of the refrigeration system 11 described in any optional embodiment above. As shown in fig. 2 and 3, the refrigeration system 11 includes a refrigerant circulation loop mainly formed by connecting a condenser 111 for exchanging heat with the outside, an evaporator 112 for exchanging heat with the inside, a compressor 15, and a throttling device 14, and the refrigeration system 11 further includes a heat regenerator, wherein a first heat recovery chamber 161 of the heat regenerator is connected in series with a refrigerant pipe section between the condenser 111 and the throttling device 14, and a second heat recovery chamber 162 is connected in series with a refrigerant pipe section between the evaporator 112 and the compressor 15; the refrigeration system 11 further includes a controller 13, the controller 13 being configured to: when the refrigeration system 11 needs to be started and the throttling device 14 is initially closed by default, the compressor 15 is controlled to be started; acquiring the superheat degree of a refrigerant at one or more low-pressure detection positions of the refrigeration system 11; and controlling to open the throttling device 14 in response to the refrigerant superheat degree of one or more low-pressure detection positions of the refrigeration system 11 meeting a preset superheat degree condition.

Optionally, the controller 13 is specifically configured to: obtaining the superheat degree of the refrigerant at the refrigerant outlet of the evaporator 112; and if the refrigerant superheat degree of the refrigerant outlet of the evaporator 112 reaches a preset first refrigerant superheat degree threshold value, determining that a preset superheat degree condition is met.

Optionally, the obtaining of the refrigerant superheat degree at the low-pressure detection position provided in any optional embodiment includes obtaining a refrigerant superheat degree of a refrigerant outlet of the evaporator 112, where the controller 13 is specifically configured to compare the obtained refrigerant superheat degree of the refrigerant outlet of the evaporator 112 with a preset first refrigerant superheat degree threshold, and if the obtained refrigerant superheat degree of the refrigerant outlet of the evaporator 112 is not consistent with the preset first refrigerant superheat degree threshold, that is, the refrigerant superheat degree of the refrigerant outlet of the evaporator 112 does not meet a preset superheat degree condition, temporarily not opening the throttle device 14, and continuing to detect the refrigerant superheat degree of the refrigerant outlet of the evaporator 112 until the refrigerant superheat degree of the refrigerant outlet of the evaporator 112 is consistent with the preset first refrigerant superheat degree threshold, and the refrigerant superheat degree of the refrigerant outlet of the evaporator 112 meets the preset superheat degree condition.

Optionally, the controller 13 is specifically configured to: obtaining the refrigerant superheat degree of the intermediate refrigerant of the evaporator 112; and if the refrigerant superheat degree of the intermediate refrigerant of the evaporator 112 reaches a preset second refrigerant superheat degree threshold value, determining that a preset superheat degree condition is met.

Optionally, the obtaining of the refrigerant superheat degree of the low-pressure detection position provided in any optional embodiment includes obtaining a refrigerant superheat degree of an intermediate refrigerant of the evaporator 112, where the controller 13 is specifically configured to compare the obtained refrigerant superheat degree of the intermediate refrigerant of the evaporator 112 with a preset second refrigerant superheat degree threshold, and if the obtained refrigerant superheat degree of the intermediate refrigerant of the evaporator 112 is not consistent with the preset second refrigerant superheat degree threshold, that is, the refrigerant superheat degree of the intermediate refrigerant of the evaporator 112 does not satisfy the preset superheat degree condition, temporarily not opening the throttle device 14, and continuing to detect the refrigerant superheat degree of the intermediate refrigerant of the evaporator 112 until the refrigerant superheat degree of the intermediate refrigerant of the evaporator 112 is consistent with the preset second refrigerant superheat degree threshold, and the refrigerant superheat degree of the intermediate refrigerant of the evaporator 112 satisfies the preset superheat degree condition. Thus, when the compressor needs to be started, the compressor 15 is preferentially controlled to be started, and the control judgment of the opening of the throttling device 14 such as an electronic expansion valve is carried out according to the refrigerant superheat degree of the intermediate refrigerant of the evaporator 112; the refrigeration capacity loss of part of refrigerants in the starting process of the refrigeration system 11 can be effectively reduced, and the stability and the safety of the overall operation of the refrigeration system 11 are ensured.

Optionally, the controller 13 is specifically configured to: obtaining the superheat degree of a refrigerant of the heat regenerator 16; and if the superheat degree of the refrigerant in the second regenerative cavity 162 of the regenerator reaches the preset third refrigerant superheat degree threshold value, determining that the preset superheat degree condition is met.

Optionally, the obtaining of the superheat degree of the refrigerant at the low-pressure detection position provided in any optional embodiment includes obtaining the superheat degree of the refrigerant in the second regenerative cavity 162 of the regenerator, where the controller 13 is specifically configured to compare the obtained superheat degree of the refrigerant in the second regenerative cavity 162 of the regenerator with a preset third refrigerant superheat threshold, and if the obtained superheat degree of the refrigerant in the second regenerative cavity 162 of the regenerator is inconsistent with the preset third refrigerant superheat threshold, that is, the superheat degree of the refrigerant in the second regenerative cavity 162 of the regenerator does not satisfy the preset superheat condition, the throttle device 14 is not temporarily turned on, and the superheat degree of the refrigerant in the second regenerative cavity 162 of the regenerator is continuously detected until the superheat degree of the refrigerant in the second regenerative cavity 162 of the regenerator is consistent with the preset third refrigerant superheat threshold, and the superheat degree of the refrigerant in the second regenerative cavity 162 of the regenerator satisfies the preset superheat condition.

Optionally, the obtaining of the superheat degree of the refrigerant at the low-pressure detection position provided in any optional embodiment includes obtaining a superheat degree of an intermediate refrigerant in the second regenerative cavity 162 of the regenerator, where the controller 13 is specifically configured to compare the obtained superheat degree of the intermediate refrigerant in the second regenerative cavity 162 of the regenerator with a preset third refrigerant superheat threshold, and if the obtained superheat degree of the intermediate refrigerant in the second regenerative cavity 162 of the regenerator is not consistent with the preset third refrigerant superheat threshold, that is, the superheat degree of the intermediate refrigerant in the second regenerative cavity 162 of the regenerator does not satisfy the preset superheat condition, temporarily not opening the throttling device 14, and continuously detecting the superheat degree of the intermediate refrigerant in the second regenerative cavity 162 of the regenerator until the superheat degree of the intermediate refrigerant in the second regenerative cavity 162 of the regenerator is consistent with the preset third refrigerant superheat threshold, the refrigerant superheat degree of the intermediate refrigerant of the second regenerative cavity 162 of the regenerator meets a preset superheat degree condition.

Optionally, the controller 13 is specifically configured to: obtaining the superheat degree of a refrigerant at a refrigerant outlet of a second regenerative cavity 162 of the regenerator; and if the superheat degree of the refrigerant at the refrigerant outlet of the second regenerative cavity 162 of the regenerator reaches a preset third refrigerant superheat degree threshold value, determining that a preset superheat degree condition is met.

Optionally, the obtaining of the superheat degree of the refrigerant at the low-pressure detection position provided in any optional embodiment includes obtaining the superheat degree of the refrigerant at the refrigerant outlet of the second regenerative cavity 162 of the regenerator, where the controller 13 is specifically configured to compare the obtained superheat degree of the refrigerant at the refrigerant outlet of the second regenerative cavity 162 of the regenerator with a preset third refrigerant superheat threshold, and if the obtained superheat degree of the refrigerant at the refrigerant outlet of the second regenerative cavity 162 of the regenerator is not consistent with the preset third refrigerant superheat threshold, that is, the superheat degree of the refrigerant at the refrigerant outlet of the second regenerative cavity 162 of the regenerator does not satisfy the preset superheat condition, temporarily not starting the throttling device 14, and continuing to detect the superheat degree of the refrigerant at the refrigerant outlet of the second regenerative cavity 162 of the regenerator until the superheat degree of the refrigerant outlet of the second regenerative cavity 162 of the regenerator is consistent with the preset third refrigerant superheat threshold, the refrigerant superheat degree of the refrigerant outlet of the second regenerative cavity 162 of the regenerator meets the preset superheat degree condition.

The embodiment of the present application further provides a refrigerator device 1, where the refrigerator device 1 includes a refrigeration system 11 as described in any of the above optional embodiments.

Herein, the model of the refrigerator device 1 is not specifically limited, and the refrigeration system 11 of the refrigerator device 1 and the control method of the refrigeration system 11 may be the refrigeration system 11 according to any of the above-described optional embodiments.

Here, the specification of the compressor 15 is not specifically limited, and the compressor 15 of the refrigeration system 11 may be a high-starting-torque compressor 15, in which the compressor 15 is started to operate before the refrigeration system 11 of the refrigerator equipment 1 is started each time, and then the throttling device 14 is opened after a preset time is reached.

Optionally, when the compressor 15 of the refrigeration system 11 is a compressor 15 with a high starting torque, the refrigeration system 11 of the freezer device 1 starts the compressor 15 first before starting each time to operate the compressor, and then opens the throttling device 14 after the refrigerant outlet superheat degree of the evaporator 112 reaches a preset first refrigerant superheat degree threshold value.

Optionally, when the compressor 15 of the refrigeration system 11 is a compressor 15 with a high starting torque, the refrigeration system 11 of the freezer device 1 starts the compressor 15 first before starting each time to operate the compressor, and then opens the throttling device 14 after the superheat degree of the intermediate refrigerant of the evaporator 112 reaches a preset second refrigerant superheat degree threshold value.

Optionally, when the compressor 15 of the refrigeration system 11 is a compressor 15 with a high starting torque, the refrigeration system 11 of the freezer device 1 starts the compressor 15 first before starting each time to operate the compressor, and then opens the throttling device 14 after the superheat degree of the refrigerant of the heat regenerator reaches a preset third refrigerant superheat degree threshold value.

Optionally, when the compressor 15 of the refrigeration system 11 is a compressor 15 with a high starting torque, the refrigeration system 11 of the freezer device 1 starts the compressor 15 first before starting each time, so that the compressor 15 works, and then opens the throttling device 14 after the superheat degree of the refrigerant in the second regenerative chamber 162 of the regenerator reaches a preset third refrigerant superheat degree threshold value.

Optionally, in an optional embodiment of the present application, the throttling device 14 is not specifically limited, the throttling device 14 may be an electronic expansion valve, and when the compressor 15 of the refrigeration system 11 is the compressor 15 with a low starting torque, the refrigeration system 11 of the freezer device 1, before starting up, first adjusts the electronic expansion valve to a maximum opening degree, closes the electronic expansion valve again, then opens the compressor 15 to be in a working state, and opens the electronic expansion valve again after a preset time delay.

Optionally, when the compressor 15 of the refrigeration system 11 is a compressor 15 with a low starting torque, before the refrigeration system 11 of the freezer device 1 is started, the electronic expansion valve is first adjusted to the maximum opening degree, the electronic expansion valve is closed again, then the compressor 15 is opened to be in a working state, and when the superheat degree of the refrigerant outlet refrigerant of the evaporator 112 reaches a preset first refrigerant superheat degree threshold value, the electronic expansion valve is opened again.

Optionally, when the compressor 15 of the refrigeration system 11 is a compressor 15 with a low starting torque, before the refrigeration system 11 of the freezer device 1 is started, the electronic expansion valve is first adjusted to the maximum opening degree, the electronic expansion valve is closed again, then the compressor 15 is opened to be in a working state, and when the superheat degree of the intermediate refrigerant of the evaporator 112 reaches a preset second refrigerant superheat degree threshold value, the electronic expansion valve is opened again.

Optionally, when the compressor 15 of the refrigeration system 11 is a compressor 15 with a low starting torque, before the refrigeration system 11 of the freezer device 1 is started, the electronic expansion valve is first adjusted to the maximum opening degree, the electronic expansion valve is closed again, then the compressor 15 is opened to be in a working state, and when the superheat degree of the refrigerant of the heat regenerator reaches a preset third refrigerant superheat degree threshold value, the electronic expansion valve is opened again.

Optionally, when the compressor 15 of the refrigeration system 11 is a compressor 15 with a low starting torque, before the refrigeration system 11 of the freezer device 1 is started, the electronic expansion valve is first adjusted to the maximum opening degree, the electronic expansion valve is closed again, then the compressor 15 is started to be in a working state, and when the superheat degree of the refrigerant in the second regenerative cavity 162 of the heat regenerator reaches a preset third refrigerant superheat degree threshold value, the electronic expansion valve is started again.

The disclosed embodiments provide a computer-readable storage medium storing computer-executable instructions configured to perform a method of controlling a refrigeration system according to any of the above-described alternative embodiments.

The disclosed embodiments provide a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform a method of controlling a refrigeration system of any of the above optional embodiments.

The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.

An embodiment of the present disclosure provides an electronic device, a structure of which is shown in fig. 4, the electronic device including:

at least one processor (processor)400, one processor 400 being exemplified in fig. 4; and a memory (memory)401, and may further include a Communication Interface 402 and a bus 403. The processor 400, the communication interface 402, and the memory 401 may communicate with each other through a bus 403. Communication interface 402 may be used for information transfer. The processor 400 may invoke logic instructions in the memory 401 to perform the control method of the refrigeration system of the above-described embodiment.

In addition, the logic instructions in the memory 401 may be implemented in the form of software functional units and may be stored in a computer readable storage medium when the logic instructions are sold or used as independent products.

The memory 401 is a computer-readable storage medium and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 400 executes functional applications and data processing by executing software programs, instructions and modules stored in the memory 401, namely, implements the control method of the refrigeration system in the above method embodiment.

The memory 401 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the memory 401 may include a high-speed random access memory, and may also include a nonvolatile memory.

The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the disclosed embodiments includes the full ambit of the claims, as well as all available equivalents of the claims. As used in this application, although the terms "first," "second," etc. may be used in this application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, unless the meaning of the description changes, so long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first and second elements are both elements, but may not be the same element. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.

Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend 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 disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims

1. A control method of a refrigeration system comprises a refrigerant circulation loop which is mainly formed by connecting a condenser for exchanging heat externally, an evaporator for exchanging heat internally, a compressor and a throttling device, and is characterized by also comprising a heat regenerator, wherein a first heat recovery cavity of the heat regenerator is connected with a refrigerant pipe section between the condenser and the throttling device in series, and a second heat recovery cavity is connected with a refrigerant pipe section between the evaporator and the compressor in series;

the control method comprises the following steps:

when the refrigeration system needs to be started and the throttling device is initially closed by default, controlling to start the compressor;

acquiring the superheat degree of a refrigerant at one or more low-pressure detection positions of the refrigeration system, wherein the one or more low-pressure detection positions comprise the evaporator, the second regenerative cavity of the regenerator, a first refrigerant sub-pipe section of the evaporator connected with the second regenerative cavity, and a second refrigerant sub-pipe section of the compressor connected with the second regenerative cavity;

2. The control method as claimed in claim 1, wherein said obtaining refrigerant superheat at one or more low pressure sensing locations of the refrigerant system comprises: acquiring the superheat degree of a refrigerant at a refrigerant outlet of the evaporator;

the control method comprises the following steps: and if the refrigerant superheat degree of the refrigerant outlet of the evaporator reaches a preset first refrigerant superheat degree threshold value, determining that the preset superheat degree condition is met.

3. The control method according to claim 1,

the acquiring of the refrigerant superheat degree of one or more low-pressure detection positions of the refrigeration system comprises the following steps: acquiring the refrigerant superheat degree of an intermediate refrigerant of the evaporator;

the control method comprises the following steps: and if the refrigerant superheat degree of the intermediate refrigerant of the evaporator reaches a preset second refrigerant superheat degree threshold value, determining that the preset superheat degree condition is met.

4. The control method according to claim 1,

the acquiring of the refrigerant superheat degree of one or more low-pressure detection positions of the refrigeration system comprises the following steps: obtaining the superheat degree of a refrigerant of the second regenerative cavity of the heat regenerator;

the control method comprises the following steps: and if the refrigerant superheat degree of the second heat recovery cavity of the heat regenerator reaches a preset third refrigerant superheat degree threshold value, determining that the preset superheat degree condition is met.

5. The control method according to claim 4, wherein said obtaining the superheat of the refrigerant of the second regenerative chamber of the regenerator comprises: and acquiring the refrigerant superheat degree of the intermediate refrigerant of the second regenerative cavity of the regenerator.

6. The control method according to claim 1, wherein if the compressor is a model with a preset low starting torque, before controlling to turn on the compressor, the control method further comprises:

and controlling the throttling device to be closed after the throttling device is opened for a set time at the maximum flow opening.

7. A refrigerating system comprises a refrigerant circulation loop which is mainly formed by connecting a condenser for exchanging heat externally, an evaporator for exchanging heat internally, a compressor and a throttling device, and is characterized by also comprising a heat regenerator, wherein a first heat recovery cavity of the heat regenerator is connected with a refrigerant pipe section between the condenser and the throttling device in series, and a second heat recovery cavity is connected with a refrigerant pipe section between the evaporator and the compressor in series;

the refrigeration system further includes a controller for:

8. The refrigeration system of claim 7, wherein the controller is specifically configured to:

acquiring the superheat degree of a refrigerant at a refrigerant outlet of the evaporator; and

and if the refrigerant superheat degree of the refrigerant outlet of the evaporator reaches a preset first refrigerant superheat degree threshold value, determining that the preset superheat degree condition is met.

9. The refrigerant system as set forth in claim 7, wherein if said compressor is of a preset low starting torque type, before controlling to turn on said compressor, said control method further includes:

10. A refrigerator appliance characterized in that it has a refrigeration system as claimed in any one of claims 7 to 9.