WO2020220988A1 - Freezer apparatus, and refrigerating system and control method therefor - Google Patents

Abstract

Disclosed are a freezer apparatus (1), and a refrigerating system (11) and a control method therefor, which belong to the field of refrigerating apparatuses. The refrigerating system (11) comprises a refrigerant circulation loop formed by connecting a condenser (111), an evaporator (112), a compressor (15) and a throttling device (14), and further comprises a heat regenerator (16). The control method comprises: obtaining a suction temperature of the compressor (15) in a running process of the refrigerating system (11); determining a refrigerant temperature and a refrigerant supercooling degree at an outlet of the condenser (111); and controlling and adjusting, according to the suction temperature of the compressor (15) and the supercooling degree at the refrigerant outlet of the condenser (111), a flow rate opening degree of the throttling device (14). By means of the control method for the refrigerating system (11), the difficulties in mounting and maintaining a sensor due to arrangement of the sensor on a freezer evaporator arranged in a foaming layer can be prevented, thereby effectively simplifying the mounting and maintenance of the sensor, and accurate adjustment and control over the opening degree of a throttling device, such as an electronic expansion valve, can still be guaranteed.

Description

Refrigerator equipment, refrigeration system and control method thereof

This application is filed based on a Chinese patent application with an application number of 201910348349.7 and an application date of April 28, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference into this application.

Technical field

This application relates to the field of refrigeration equipment, for example, to a refrigeration cabinet equipment, a refrigeration system and a control method thereof.

Background technique

The electronic expansion valve is a throttling element that can adjust the refrigerant flow of the refrigeration device according to the preset program. It is often used for the throttling control of the refrigerant flow of refrigeration equipment such as refrigerators and air conditioners; especially when the load changes during the operation of the refrigeration equipment. In severe or wide range of operating conditions, traditional throttling components (such as capillary tubes, thermal expansion valves, etc.) can no longer meet the requirements of comfort and energy saving. Electronic expansion valves have become more comprehensive as throttling components with more comprehensive functions. More and more widely used.

The electronic expansion valve has the advantages of fast response and action speed. Generally, it only takes a few seconds to go from fully closed to fully open. The opening and closing characteristics and speed can be set artificially; the electronic expansion valve can be 10%-100% Precise adjustment within the range, and the adjustment range can be set according to the actual work requirements of different refrigeration equipment products.

For current refrigeration equipment using electronic expansion valves, the control method of the electronic expansion valve is generally to adjust the opening degree of the electronic expansion valve according to the degree of refrigerant superheat detected by the evaporator of the refrigeration equipment. For example, the degree of refrigerant superheat is relatively high. When it is high, the opening of the electronic expansion valve is increased, and when the refrigerant superheat is small, the opening of the electronic expansion valve is decreased. Correspondingly, in order to achieve the above control process, the refrigeration equipment needs to be equipped with a refrigerant superheat control system composed of electronic expansion valves, pressure sensors, temperature sensors, controllers and other components. The pressure sensor is mainly responsible for detecting the evaporation pressure of the refrigerant in the evaporator. , And convert the evaporation pressure value into a 4mA-20mA current signal; the temperature sensor can generate the corresponding resistance value signal according to the temperature; the controller can receive the 4mA-20mA current signal sent by the pressure sensor, and the temperature sensor According to these signals, the refrigerant superheat of the evaporator is determined, and then the built-in program sends out a pulse signal to control the opening of the electronic expansion valve; the electronic expansion valve controls the opening of the expansion valve according to the received pulse signal to ensure proper amount The amount of liquid supply and suitable superheat.

The above control process requires multiple sensors such as temperature sensor and pressure sensor to be installed in the middle or outlet position of the evaporator; since the evaporators of refrigeration equipment such as refrigerators are mostly placed in the foam layer, the installation of the above sensors is not convenient on the one hand, and the other When the sensor fails, it is not easy to disassemble and repair.

Summary of the invention

In order to have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not a general comment, nor is it intended to determine key/important components or describe the scope of protection of these embodiments, but serves as a prelude to the detailed description that follows.

According to an aspect of the embodiments of the present disclosure, there is provided a control method of a refrigeration system.

In some optional embodiments, the refrigeration system includes a refrigerant circulation loop composed mainly of a condenser for external heat exchange, an evaporator for internal heat exchange, a compressor, and a throttling device. The refrigeration system also includes a heat regenerator. , The first regenerative cavity of the regenerator is connected in series with the refrigerant pipe section between the condenser and throttling device, and the second regenerative cavity of the regenerator is connected in series with the refrigerant pipe section between the evaporator and the compressor;

The control method includes:

Obtain the compressor suction temperature and condenser outlet temperature during the operation of the refrigeration system;

Determine the degree of refrigerant subcooling at the refrigerant outlet of the condenser;

According to the suction temperature of the compressor, the temperature of the outlet of the condenser, and the degree of refrigerant subcooling at the refrigerant outlet of the condenser, the flow opening degree of the throttling device is controlled and adjusted.

In an optional embodiment, the control method further includes: obtaining the intermediate refrigerant temperature and the refrigerant outlet temperature of the condenser; determining the refrigerant supercooling degree of the refrigerant outlet of the condenser, including: calculating the intermediate refrigerant temperature and the refrigerant of the condenser The temperature difference between the outlet temperatures obtains the degree of refrigerant supercooling at the refrigerant outlet of the condenser;

According to the suction temperature of the compressor, the temperature of the outlet of the condenser, and the degree of refrigerant subcooling of the refrigerant outlet of the condenser, controlling and adjusting the flow opening of the throttling device includes:

Calculate the temperature difference between the refrigerant temperature at the outlet of the condenser and the suction temperature of the compressor;

According to the temperature difference and the preset first difference threshold, the refrigerant supercooling degree of the refrigerant outlet and the preset supercooling threshold, the flow opening degree of the throttling device is controlled and adjusted.

In an optional embodiment, the flow opening degree of the throttling device is controlled and adjusted according to the temperature difference and the preset first difference threshold, the refrigerant supercooling degree at the condenser outlet and the preset supercooling threshold, include:

When the temperature difference is greater than the preset first difference threshold, or the refrigerant supercooling degree of the refrigerant outlet is less than the preset supercooling threshold, control to reduce the flow opening degree of the throttling device.

In an optional embodiment, the flow opening degree of the throttling device is controlled and adjusted according to the temperature difference and the preset first difference threshold, the refrigerant supercooling degree at the condenser outlet and the preset supercooling threshold, include:

When the temperature difference is less than the preset first difference threshold, and the refrigerant supercooling degree of the refrigerant outlet is greater than the preset supercooling threshold, control to increase the flow opening degree of the throttling device.

In an optional embodiment, controlling and adjusting the flow opening degree of the throttling device according to the temperature difference and the preset first difference threshold, the refrigerant subcooling degree of the refrigerant outlet and the preset subcooling threshold value, includes :

When the temperature difference is equal to the preset first difference threshold and the refrigerant subcooling degree at the outlet of the condenser is greater than the preset subcooling threshold value, the flow opening degree of the throttling device is kept unchanged.

In an optional implementation manner, the control method further includes:

Based on the absolute value of the temperature deviation between the temperature difference and the preset first difference threshold, it is determined to reduce or increase the opening adjustment rate of the throttle device.

According to another aspect of the embodiments of the present disclosure, a refrigeration system is provided.

In some optional embodiments, the refrigeration system includes a refrigerant circulation loop composed mainly of a condenser for external heat exchange, an evaporator for internal heat exchange, a compressor, and a throttling device. The refrigeration system also includes a heat regenerator. , The first regenerative cavity of the regenerator is connected in series with the refrigerant pipe section between the condenser and throttling device, and the second regenerative cavity of the regenerator is connected in series with the refrigerant pipe section between the evaporator and the compressor;

The refrigeration system also includes:

The first temperature sensor is used to obtain the suction temperature of the compressor during the operation of the refrigeration system;

The second temperature sensor is used to obtain the refrigerant temperature at the outlet of the condenser during the operation of the refrigeration system;

The controller is used to determine the degree of refrigerant subcooling at the refrigerant outlet of the condenser;

According to the suction temperature of the compressor, the temperature of the outlet of the condenser, and the degree of refrigerant subcooling at the refrigerant outlet of the condenser, the flow opening degree of the throttling device is controlled and adjusted.

In an optional embodiment, the refrigeration system further includes:

The third temperature sensor is used to obtain the temperature of the intermediate refrigerant of the condenser;

The controller is specifically used for:

Calculate the temperature difference between the intermediate refrigerant temperature and the outlet refrigerant temperature of the condenser to obtain the refrigerant supercooling degree at the refrigerant outlet of the condenser;

The controller is also specifically used for:

Calculate the temperature difference between the refrigerant temperature at the outlet of the condenser and the suction temperature of the compressor;

According to the temperature difference and the preset first difference threshold, the refrigerant supercooling degree of the refrigerant outlet and the preset supercooling threshold, the flow opening degree of the throttling device is controlled and adjusted.

In an optional implementation manner, the controller is specifically configured to:

When the temperature difference is greater than the preset first difference threshold, or the refrigerant supercooling degree of the refrigerant outlet is less than the preset supercooling threshold, control to reduce the flow opening degree of the throttling device.

In an optional implementation manner, the controller is specifically configured to:

When the temperature difference is less than the preset first difference threshold, and the refrigerant supercooling degree of the refrigerant outlet is greater than the preset supercooling threshold, control to increase the flow opening degree of the throttling device.

In an optional implementation manner, the controller is specifically configured to:

When the temperature difference is equal to the preset first difference threshold and the refrigerant supercooling degree of the refrigerant outlet is greater than the preset supercooling threshold value, the flow opening degree of the throttling device is kept unchanged.

In an optional implementation manner, the controller is specifically configured to:

Based on the absolute value of the temperature deviation between the temperature difference and the preset first difference threshold, it is determined to reduce or increase the opening adjustment rate of the throttle device.

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

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

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

The control method of the refrigeration system provided by the present application can control and adjust the flow opening of the throttling device according to the suction temperature of the compressor and the refrigerant subcooling degree of the refrigerant outlet of the condenser; therefore, it can avoid setting multiple sensors on the refrigeration system The resulting complication of the internal structure effectively simplifies the internal assembly structure of the refrigeration system and its applied refrigeration equipment, while still ensuring precise adjustment and control of the opening of throttling devices such as electronic expansion valves.

The above general description and the following description are only exemplary and explanatory, and are not used to limit the application.

Description of the drawings

One or more embodiments are exemplified by the accompanying drawings. These exemplified descriptions and drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and among them:

Figure 1 is a schematic structural diagram of a refrigeration system provided by an embodiment of the present disclosure;

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

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

4 is a schematic flowchart of a control method of a refrigeration system provided by an embodiment of the present disclosure;

5 is a schematic diagram of the overall structure of the refrigeration system provided by an embodiment of the present disclosure;

Fig. 6 is a schematic structural diagram of an electronic device provided by an embodiment of the present disclosure.

Reference signs:

1. Freezer equipment; 11. Refrigeration system; 111, condenser; 112, evaporator; 121, first temperature sensor; 122, third temperature sensor; 123, second temperature sensor; 13, controller; 14, throttling Device; 15, compressor; 16, regenerator; 161, first regenerative cavity; 162, second regenerative cavity; 600, processor; 601, memory; 602, communication interface; 603, bus.

Detailed ways

In order to have a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The attached drawings are for reference and explanation purposes only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a number of details are used to provide a sufficient understanding of the disclosed embodiments. However, without these details, one or more embodiments can still be implemented. In other cases, in order to simplify the drawings, well-known structures and devices may be simply shown.

In the embodiment of the present application, the control method of the refrigeration system 11 can control and adjust the flow opening of the throttling device 14 according to the suction temperature of the compressor 15 and the degree of refrigerant subcooling at the refrigerant outlet of the condenser 111; The internal structure of the system 11 is complicated by the arrangement of multiple sensors, which effectively simplifies the internal assembly structure of the refrigeration system 11 and the refrigeration equipment used by it, and can still ensure the precise adjustment of the opening of the throttling device 14 such as the electronic expansion valve. control.

Fig. 1 is a schematic structural diagram of a refrigeration system 11 of the present application according to an exemplary embodiment. As shown in Fig. 1, the refrigeration system 11 includes a refrigerant circulation circuit composed mainly of a condenser 111 for external heat exchange, an evaporator 112 for internal heat exchange, a compressor 15 and a throttling device 14. The refrigeration system 11 also includes a return Heater 16, in which the first regenerative cavity 161 of the regenerator is connected in series with the refrigerant pipe section between the condenser 111 and the throttling device 14, and the second regenerative cavity 162 of the regenerator is connected with the evaporator 112 and compressor The refrigerant pipe sections between 15 are connected in series.

Herein, the heat regenerator 16 includes a first heat recovery cavity 161 and a second heat recovery cavity 162. The first regenerative cavity 161 of the regenerator is connected in series with the refrigerant pipe section between the condenser 111 and the throttling device 14, and the second regenerative cavity 162 of the regenerator is connected with the refrigerant pipe between the evaporator 112 and the compressor 15 Road series connection. In a refrigeration system that includes a regenerator, if the conventional method of detecting the superheat of the refrigerant at the outlet of the evaporator is used to control the opening of the throttling device, a temperature sensor and a pressure sensor must be installed at the outlet of the evaporator. In refrigeration equipment, the evaporator is arranged in the foam layer, so if the temperature sensor and pressure sensor at the outlet of the evaporator are installed, they will be arranged in the foam layer. This will cause the installation and maintenance of the sensor to be very inconvenient. Considering the above problems, in this application, we adopt the method of detecting the suction temperature of the compressor, the temperature of the condenser outlet and determining the refrigerant subcooling degree of the refrigerant outlet of the condenser to control and adjust the flow opening of the throttling device , No need to rely on the parameters detected by the sensor set on the evaporator to control the opening degree, which effectively simplifies the installation of the sensor and facilitates maintenance, and can still ensure the precise adjustment and control of the opening degree of throttling devices such as electronic expansion valves.

In some embodiments, when the refrigeration system is applied to air conditioning equipment, the condenser 111 is a heat exchanger used for heat exchange between the refrigeration system 11 and the outdoor environment; the evaporator 112 is used for the refrigeration system 11 and the indoor environment. A heat exchanger for exchanging heat between environments; in the case that the refrigeration system is applied to refrigerator equipment, the condenser 111 is a heat exchanger for heat exchange between the refrigeration system 11 and the environment outside the refrigerator equipment shell; evaporator 112 is a heat exchanger used for heat exchange between the refrigeration system 11 and the refrigerating environment in the housing of the freezer equipment.

In some optional embodiments, a method for controlling a refrigeration system is provided, including:

Obtain the suction temperature of the compressor 15 during the operation of the refrigeration system;

Determine the degree of refrigerant supercooling at the refrigerant outlet of the condenser 111;

Based on the intake temperature of the compressor 15 and the degree of refrigerant subcooling at the refrigerant outlet of the condenser 111, the flow opening degree of the throttle device 14 is controlled and adjusted.

The embodiment of the present disclosure does not specifically limit the application equipment of the refrigeration system 11, which can be the refrigeration system 11 of the freezer device 1. At this time, the refrigeration system 11 is all installed in the shell of the freezer device 1, and the freezer device 1 is generally placed in an indoor environment. in.

Optionally, in the refrigeration system 11, the evaporator 112 flows out the low-temperature and low-pressure gaseous refrigerant, passes through the refrigerant pipeline, and enters the compressor 15. Through the work of the compressor 15, the refrigerant in the pipeline is compressed into a high-temperature and high-pressure gaseous refrigerant. The suction temperature of the compressor 15 is the temperature of the low-temperature and low-pressure gaseous refrigerant entering the compressor 15.

Optionally, in the refrigeration system 11, since the pipeline flowing into the evaporator 112 is a low-temperature and low-pressure liquid refrigerant passing through the evaporator 112, it is difficult to ensure sufficient heat exchange during actual operation, and the refrigerant flowing out of the evaporator 112 may contain gas. However, the requirements for the refrigerant entering the compressor 15 are very strict and must be gaseous refrigerant. Therefore, in order to ensure that the refrigerant in the refrigerant pipe section between the evaporator 112 and the compressor 15 is all gaseous, here, the refrigeration system 11 The regenerator 16 is added. When the refrigerant flows out of the evaporator 112, it then enters the second regenerative cavity 162 of the regenerator, so that the refrigerant in the pipeline is fully heat exchanged, and all of them are gaseous. The second regenerative cavity 162 flows out and enters the gas refrigerant suction port of the compressor 15. At this time, the suction temperature of the compressor 15 is the temperature of the low temperature and low pressure gas refrigerant entering the compressor 15.

The embodiment of the present disclosure does not specifically limit the throttling device 14 in the refrigeration system 11. It may be an electronic expansion valve. The electronic expansion valve receives the electrical signal generated by the controller 13, and can adjust the cooling liquid supply volume of the variable capacity refrigeration system steplessly. Wide range, fast adjustment response, and stepless control of the flow opening of the refrigerant passing through the pipeline.

Optionally, in the refrigeration system 11, the low-temperature and low-pressure gaseous refrigerant enters the compressor 15, after the compressor 15 works, outputs the gaseous high-temperature and high-pressure gaseous refrigerant, enters the refrigerant pipeline, and then enters the condenser 111 and passes through the condenser The heat exchange between 111 and the external environment reduces the temperature of the refrigerant, and outputs gaseous low-temperature and high-pressure gaseous refrigerant. In order to reduce the flow pressure in the refrigerant pipeline, it passes through the throttling device 14, such as through a locally reduced refrigerant pipeline, to make it flow out The refrigerant of the throttling device 14 is a low-temperature and low-pressure liquid refrigerant, and then the low-temperature and low-pressure liquid refrigerant enters the evaporator 112 to cool the refrigeration part of the refrigeration system 11. For example, the refrigeration system 11 is used in a refrigerator, and the evaporator 112 is the heat preservation in the refrigerator. The space is cooled to form a refrigerated environment.

Optionally, in order to make the low-temperature and high-pressure gaseous refrigerant output by the condenser 111 can be converted into a low-temperature and low-pressure liquid refrigerant through the throttling device 14 to provide a sufficient cold source for the evaporator 112, the refrigeration system 11 can be added to the regenerator 16, When the refrigerant flows out of the condenser 111, it then enters the first regenerative cavity 161 of the regenerator, so that the refrigerant in the pipeline exchanges heat, and at the same time, the refrigerant in the second regenerative cavity 162 of the regenerator absorbs The heat, fully vaporized, is completely converted into gaseous refrigerant, and enters the compressor 15. The refrigerant passing through the first regenerative cavity 161 of the regenerator flows out and enters the throttling device 14 to continue the circulating operation of the refrigerant circulation circuit.

Fig. 2 is a schematic flowchart of a control method of the refrigeration system of the present application according to an exemplary embodiment.

As shown in Figure 2, the present application provides a control method for a refrigeration system. The control method can control and adjust the throttle device 14 according to the suction temperature of the compressor 15 and the refrigerant subcooling degree of the refrigerant outlet of the condenser 111. Flow opening; thus avoiding the complication of the internal structure of the refrigeration equipment caused by the installation of multiple sensors on the evaporator 112, effectively simplifying the internal assembly structure of the refrigeration system and its application refrigeration equipment, and still ensuring that the electronic expansion valve The precise adjustment control of the opening degree of the throttling device 14. Specifically, the main steps of the control method include:

S1. Obtain the suction temperature of the compressor 15 during the operation of the refrigeration system;

Optionally, the refrigeration system 11 includes a first temperature sensor 121 arranged at the point where the gaseous refrigerant enters the compressor 15, and the sensor can be used to detect the suction temperature of the compressor 15 in the refrigeration system.

In this embodiment, the suction temperature of the compressor 15 of the refrigeration system 11 may be in degrees Celsius.

Here, the refrigeration system 11 starts to operate, and the first temperature sensor 121 starts to detect the suction temperature of the compressor 15.

Optionally, the refrigeration system 11 further includes a heat regenerator 16, and the heat regenerator 16 includes a first heat recovery cavity 161 and a second heat recovery cavity 162. Therefore, the refrigeration system 11 includes the first regenerative cavity 161 of the regenerator connected in series with the refrigerant pipe section between the condenser 111 and the throttling device 14, and the refrigeration system 11 also includes the connection between the evaporator 112 and the compressor 15. The second regenerative cavity 162 connected in series with the refrigerant pipeline.

S2. Determine the degree of refrigerant supercooling at the refrigerant outlet of the condenser 111;

Optionally, the throttling device 14 can control and adjust its own flow opening according to the degree of refrigerant subcooling at the outlet of the condenser 111, and adjust the degree of refrigerant subcooling at the outlet of the condenser 111 to a preset subcooling threshold. By comparison, when the refrigerant subcooling degree at the outlet of the condenser 111 is not equal to the preset subcooling threshold, the flow opening degree of the throttling device 14 is controlled and adjusted until the refrigerant subcooling degree at the outlet of the condenser 111 is equal to the preset supercooling threshold. The cold thresholds are equal.

S3. According to the suction temperature of the compressor 15 and the degree of refrigerant subcooling at the refrigerant outlet of the condenser 111, the flow opening degree of the throttling device is controlled and adjusted.

Optionally, the throttling device 14 can be controlled and adjusted according to the refrigerant subcooling degree of the refrigerant outlet of the condenser 111, and compare the refrigerant subcooling degree of the refrigerant outlet of the condenser 111 with a preset supercooling threshold. When the refrigerant subcooling degree of the refrigerant outlet of 111 is not equal to the preset supercooling threshold, control and adjust the flow opening of the throttling device 14 until the refrigerant subcooling degree of the refrigerant outlet of the condenser 111 is equal to the preset supercooling threshold. . The specific control method is as follows: when the refrigerant supercooling degree of the refrigerant outlet of the condenser 111 is greater than the preset supercooling threshold, the flow opening degree of the throttle device 14 is controlled to increase; when the refrigerant supercooling degree of the refrigerant outlet of the condenser 111 is When it is less than the preset supercooling threshold, control reduces the flow opening degree of the throttle device 14 until the refrigerant supercooling degree of the refrigerant outlet of the condenser 111 is equal to the preset supercooling threshold.

Optionally, the control method further includes, based on the absolute value of the temperature deviation between the refrigerant subcooling degree of the refrigerant outlet of the condenser 111 and the preset subcooling threshold, determining to reduce or increase the opening adjustment of the throttling device 14 rate.

Optionally, the throttling device 14 can be adjusted according to the suction temperature of the compressor 15 to compare the compressed suction temperature with a preset suction temperature threshold. When the suction temperature of the compressor 15 is not equal to the preset compression When the intake air temperature threshold of the compressor 15 is used, the flow opening of the throttle device 14 is controlled and adjusted until the intake air temperature of the compressor 15 is equal to the preset intake air temperature threshold of the compressor 15. The specific control method is: when the suction temperature value of the compressor 15 is greater than the preset suction temperature threshold, control to reduce the flow opening of the throttling device 14; when the suction temperature value of the compressor 15 is lower than the preset suction temperature threshold The temperature threshold is controlled to increase the flow opening of the throttle device 14 until the suction temperature of the compressor 15 is equal to the preset suction temperature threshold.

Optionally, the control method further includes determining to reduce or increase the opening degree of the throttle device 14 based on the absolute value of the temperature deviation between the suction temperature of the compressor 15 and a preset suction temperature threshold of the compressor 15 Adjust the rate.

Fig. 3 is a schematic flowchart of a control method of the refrigeration system of the present application shown according to another exemplary embodiment.

As shown in FIG. 3, the present application further provides a control method of a refrigeration system, which can control and adjust the throttling device 14 according to the suction temperature of the compressor 15 and the refrigerant supercooling degree of the refrigerant outlet of the condenser 111 Therefore, it can avoid the complication of the internal structure of the refrigeration equipment caused by the installation of multiple sensors on the evaporator 112, effectively simplify the internal assembly structure of the refrigeration system and the refrigeration equipment used, and still ensure the expansion of the electronic Accurate adjustment and control of the opening of throttle devices 14 such as valves. Specifically, the main steps of the control method include:

S201: Obtain the intermediate refrigerant temperature and the refrigerant outlet temperature of the condenser 111;

Optionally, the refrigeration system 11 includes a third temperature sensor 122 disposed in the heat exchange coil of the condenser 111, and the sensor can be used to detect the temperature of the intermediate refrigerant of the condenser 111 in the refrigeration system.

Optionally, the refrigeration system 11 includes a second temperature sensor 123 disposed in the refrigerant pipeline at the outlet of the condenser 111, and the sensor can be used to detect the refrigerant outlet temperature of the condenser 111 in the refrigeration system.

Here, the refrigeration system 11 starts to operate, and the third temperature sensor 122 and the second temperature sensor 123 start to detect the intermediate refrigerant temperature of the condenser 111 and the refrigerant outlet temperature of the condenser 111.

S202: Calculate the temperature difference between the temperature of the intermediate refrigerant of the condenser 111 and the temperature of the refrigerant outlet to obtain the degree of refrigerant supercooling at the refrigerant outlet of the condenser 111.

Optionally, during the operation of the refrigeration system 11, when the intermediate refrigerant temperature of the condenser 111 and the refrigerant outlet temperature of the condenser 111 are acquired through the third temperature sensor 122 and the second temperature sensor 123, the intermediate refrigerant temperature of the condenser 111 The refrigerant temperature and the refrigerant outlet temperature of the condenser 111 are passed into the controller 13. The controller 13 takes the temperature difference between the intermediate refrigerant temperature of the condenser 111 and the refrigerant outlet temperature of the condenser 111 to obtain the refrigerant at the refrigerant outlet of the condenser 111 Supercooling.

In this way, according to the intermediate refrigerant temperature of the condenser 111 and the refrigerant outlet temperature of the condenser 111, the refrigerant supercooling degree of the refrigerant outlet of the condenser 111 can be obtained, and the flow opening degree of the throttle device 14 can be controlled and adjusted; The complication of the internal structure caused by the arrangement of multiple sensors on the device 112 effectively simplifies the internal assembly structure of the refrigeration system and its applied refrigeration equipment, while still ensuring precise adjustment and control of the opening of the throttling device 14 such as an electronic expansion valve .

Fig. 4 is a schematic flowchart of a control method of the refrigeration system of the present application shown according to another exemplary embodiment.

As shown in FIG. 4, the present application further provides a control method of a refrigeration system, which can control and adjust the temperature according to the first temperature of the external environment, the suction temperature of the compressor 15, and the degree of refrigerant subcooling of the heat exchanger. The flow opening degree of the throttling device 14; therefore, the internal structure of the refrigeration system caused by multiple sensors can be avoided, and the internal assembly structure of the refrigeration system and its application refrigeration equipment can be effectively simplified, and the electronic Accurate adjustment control of the throttling device 14 such as the opening of the expansion valve. Specifically, the main steps of the control method include:

S301: Calculate the temperature difference between the outlet temperature of the refrigerant of the condenser 111 and the suction temperature of the compressor 15;

S302: Control and adjust the flow opening degree of the throttling device 14 according to the temperature difference value and the preset first difference threshold value, the refrigerant supercooling degree of the refrigerant outlet and the preset supercooling threshold value.

Here, the preset supercooling threshold is used to characterize the preset set of numerical ranges of the supercooling degree of the refrigerant at the refrigerant outlet of the condenser 111, and each value in the set corresponds to the flow rate of the throttling device 14 controlled by the controller 13 Degree status.

Optionally, controlling and adjusting the flow opening of the throttling device according to the temperature difference and the preset first difference threshold, the refrigerant supercooling degree of the refrigerant outlet and the preset supercooling threshold, including: when the temperature difference is greater than When the preset first difference threshold value or the refrigerant supercooling degree of the refrigerant outlet is less than the preset supercooling threshold value, control to reduce the flow opening degree of the throttling device.

Optionally, according to the temperature difference and the preset first difference threshold, the refrigerant supercooling degree of the refrigerant outlet and the preset supercooling threshold, the flow opening degree of the throttling device 14 is controlled and adjusted, including: the current temperature difference When it is less than the preset first difference threshold, and the refrigerant supercooling degree of the refrigerant outlet is greater than the preset supercooling threshold, the flow opening degree of the throttling device 14 is controlled to increase.

Optionally, according to the temperature difference and the preset first difference threshold, the refrigerant supercooling degree of the refrigerant outlet and the preset supercooling threshold, the flow opening degree of the throttling device 14 is controlled and adjusted, including: the current temperature difference When it is equal to the preset first difference threshold, and the refrigerant supercooling degree of the refrigerant outlet is greater than the preset supercooling threshold, the flow opening degree of the throttling device 14 is kept unchanged.

Optionally, the control method further includes: determining to reduce or increase the opening adjustment rate of the throttle device 14 based on the absolute value of the temperature deviation between the temperature difference and the preset first difference threshold.

In this way, the flow opening of the throttle device 14 can be controlled and adjusted according to the temperature difference between the refrigerant outlet temperature of the condenser 111 and the suction temperature of the compressor 15 and the degree of refrigerant subcooling at the refrigerant outlet; The internal structure of the evaporator 112 is complicated by the arrangement of multiple sensors, which effectively simplifies the internal assembly structure of the refrigeration system and its applied refrigeration equipment, and can still ensure the precise adjustment of the opening of the throttling device 14 such as the electronic expansion valve. control.

Fig. 5 is a schematic diagram showing the overall structure of the refrigeration system of the present application according to an exemplary embodiment.

As shown in Figure 5, the present application also provides a refrigeration system 11, which includes a condenser 111 for external heat exchange, an evaporator 112 for internal heat exchange, a compressor 15 and a throttling device 14. The refrigeration system 11 also includes a heat regenerator 16, wherein the first regenerative cavity 161 of the regenerator is connected in series with the refrigerant pipe section between the condenser 111 and the throttling device 14. The second regenerative cavity 162 is connected in series with the refrigerant pipe section between the evaporator 112 and the compressor 15; the refrigeration system 11 also includes:

The first temperature sensor 121 is used to obtain the suction temperature of the compressor 15 during the operation of the refrigeration system 11. In some cases, in order to reduce the interference of the high temperature of the compressor housing on the first temperature sensor 121, more A temperature sensor 121 is arranged far away from the compressor. For example, when used in a refrigerator, multiple first temperature sensors 121 are arranged on the pipe section of the air return pipe just out of the foam layer, wherein the air return pipe is connected to the second heat recovery chamber 162 of the heat regenerator and Compressor suction port;

The controller 13 is used to determine the degree of refrigerant subcooling at the refrigerant outlet of the condenser 111; control and adjust the flow rate of the throttling device 14 according to the suction temperature of the compressor 15 and the degree of refrigerant subcooling at the refrigerant outlet of the condenser 111 degree.

Herein, the heat regenerator 16 includes a first heat recovery cavity 161 and a second heat recovery cavity 162. The first regenerative cavity 161 of the regenerator is connected in series with the refrigerant pipe section between the condenser 111 and the throttling device 14, and the second regenerative cavity 162 of the regenerator is connected with the refrigerant pipe between the evaporator 112 and the compressor 15 Here, the first temperature sensor can be arranged on the refrigerant pipeline between the second regenerative cavity 162 and the compressor, and it can be on the pipeline near the compressor side, which is convenient for installation. The temperature detected here is also better. Close to the suction temperature of the compressor.

Herein, the condenser 111 is a heat exchanger for heat exchange between the refrigeration system 11 and the external environment; the evaporator 112 is a heat exchanger for heat exchange between the refrigeration system 11 and the indoor environment.

Here, the controller 13 can be used to determine the refrigerant subcooling degree of the refrigerant outlet of the condenser 111, that is, the controller 13 can determine the difference between the saturated liquid temperature corresponding to the outlet pressure of the condenser 111 and the actual temperature of the outlet liquid of the condenser 111.

Optionally, in the refrigeration system 11, the evaporator 112 flows out the low-temperature and low-pressure gaseous refrigerant, passes through the refrigerant pipeline, and enters the compressor 15. Through the work of the compressor 15, the refrigerant in the pipeline is compressed into a high-temperature and high-pressure gaseous refrigerant. The suction temperature of the compressor 15 is the temperature of the low-temperature and low-pressure gaseous refrigerant entering the compressor 15.

Optionally, in the refrigeration system 11, since the pipeline flowing into the evaporator 112 is a low-temperature and low-pressure liquid refrigerant passing through the evaporator 112, it is difficult to ensure sufficient heat exchange during actual operation, and the refrigerant flowing out of the evaporator 112 may contain gas. However, the requirements for the refrigerant entering the compressor 15 are very strict and must be gaseous refrigerant. Therefore, in order to ensure that the refrigerant in the refrigerant pipe section between the evaporator 112 and the compressor 15 is all gaseous, here, the refrigeration system 11 The regenerator 16 is added. When the refrigerant flows out of the evaporator 112, it then enters the second regenerative cavity 162 of the regenerator, so that the refrigerant in the pipeline is fully heat exchanged, and all of them are gaseous. The second regenerative cavity 162 flows out and enters the gas refrigerant suction port of the compressor 15. At this time, the suction temperature of the compressor 15 is the temperature of the low temperature and low pressure gas refrigerant entering the compressor 15.

The embodiment of the present disclosure does not specifically limit the throttling device 14 in the refrigeration system 11. It may be an electronic expansion valve. The electronic expansion valve receives the electrical signal generated by the controller 13, and can adjust the cooling liquid supply volume of the variable capacity refrigeration system steplessly. Wide range, fast adjustment response, and stepless control of the flow opening of the refrigerant passing through the pipeline.

Optionally, in the refrigeration system 11, the low-temperature and low-pressure gaseous refrigerant enters the compressor 15, after the compressor 15 works, outputs the gaseous high-temperature and high-pressure gaseous refrigerant, enters the refrigerant pipeline, and then enters the condenser 111 and passes through the condenser The heat exchange between 111 and the external environment reduces the temperature of the refrigerant, and outputs gaseous low-temperature and high-pressure gaseous refrigerant. In order to reduce the flow pressure in the refrigerant pipeline, it passes through the throttling device 14, such as through a locally reduced refrigerant pipeline, to make it flow out The refrigerant of the throttling device 14 is a low-temperature and low-pressure liquid refrigerant, and then the low-temperature and low-pressure liquid refrigerant enters the evaporator 112 to cool the refrigeration part of the refrigeration system 11. For example, the refrigeration system 11 is used in a refrigerator, and the evaporator 112 is the heat preservation in the refrigerator. The space is cooled to form a refrigerated environment.

Optionally, in order to convert the low-temperature and high-pressure gaseous refrigerant output by the condenser 111 into a low-temperature and low-pressure liquid refrigerant as much as possible through the throttling device 14 to provide sufficient cold source for the evaporator 112, the refrigeration system 11 can be added to the regenerator 16 When the refrigerant flows out of the condenser 111, it then enters the first regenerative cavity 161 of the regenerator, so that the refrigerant in the pipeline exchanges heat, and at the same time, the refrigerant in the second regenerative cavity 162 of the regenerator Absorb heat, fully vaporize, completely transform into gaseous refrigerant, and enter compressor 15. The refrigerant passing through the first regenerative cavity 161 of the regenerator flows out and enters the throttling device 14 to continue the circulating operation of the refrigerant circulation circuit.

Optionally, the refrigeration system 11 includes a first temperature sensor 121 disposed at the condenser 111, and the sensor can be used to detect the suction temperature of the compressor 15 during the operation of the refrigeration system.

Optionally, the refrigeration system 11 further includes a heat regenerator 16, and the heat regenerator 16 includes a first heat recovery cavity 161 and a second heat recovery cavity 162. Therefore, the refrigeration system 11 includes the first regenerative cavity 161 of the regenerator connected in series with the refrigerant pipe section between the condenser 111 and the throttling device 14, and the refrigeration system 11 also includes the connection between the evaporator 112 and the compressor 15. The second regenerative cavity 162 connected in series with the refrigerant pipeline.

Optionally, the refrigeration system 11 further includes: a third temperature sensor 122 for obtaining the temperature of the intermediate refrigerant of the condenser 111; a second temperature sensor 123 for obtaining the temperature of the refrigerant outlet of the condenser 111; the controller 13 specifically Used to: calculate the temperature difference between the intermediate refrigerant temperature of the condenser 111 and the refrigerant outlet temperature to obtain the refrigerant subcooling degree of the refrigerant outlet of the condenser 111; the controller 13 is also specifically used to: calculate the refrigerant outlet of the condenser 111 The temperature difference between the temperature and the suction temperature of the compressor 15; according to the temperature difference and the preset first difference threshold, the refrigerant supercooling degree of the refrigerant outlet and the preset supercooling threshold, the throttle device is controlled and adjusted 14 flow opening.

Optionally, the controller 13 is specifically configured to: when the temperature difference is greater than a preset first difference threshold, or the refrigerant supercooling degree at the refrigerant outlet is less than a preset supercooling threshold, control to reduce the flow rate of the throttling device 14 Opening.

Optionally, the controller 13 is specifically configured to control and increase the flow rate of the throttling device 14 when the temperature difference is less than a preset first difference threshold, and the refrigerant supercooling degree of the refrigerant outlet is greater than the preset supercooling threshold. Opening.

Optionally, the controller 13 is specifically configured to: when the temperature difference is equal to a preset first difference threshold, and the refrigerant supercooling degree at the refrigerant outlet is greater than the preset supercooling threshold, keep the flow rate of the throttling device 14 on. The degree does not change.

Optionally, the controller 13 is specifically configured to determine to reduce or increase the opening adjustment rate of the throttle device 14 based on the absolute value of the temperature deviation between the temperature difference and the preset first difference threshold.

According to another aspect of the embodiment of the present disclosure, a refrigerator apparatus 1 is provided.

In some alternative embodiments, the freezer device 1 has a refrigeration system 11 as in any of the previously disclosed embodiments.

In this way, it is possible to control and adjust the flow opening of the throttling device 14 according to the suction temperature of the compressor 15 and the degree of refrigerant subcooling at the refrigerant outlet of the condenser 111; therefore, it is possible to avoid the installation of multiple sensors inside the refrigeration system 11 The resulting complication of the internal structure effectively simplifies the internal assembly structure of the refrigeration system 11 and the refrigeration equipment to which it is applied, while still ensuring precise adjustment and control of the throttling device 14 such as the opening of the electronic expansion valve.

The embodiment of the present disclosure provides a computer-readable storage medium that stores computer-executable instructions, and the computer-executable instructions are configured to execute the control method of the refrigeration system in any of the above-mentioned optional embodiments.

The embodiments of the present disclosure provide a computer program product, the computer program product includes a computer program stored on a computer-readable storage medium, the computer program includes program instructions, and when the program instructions are executed by a computer, the computer program The computer executes the control method of the refrigeration system in any of the above optional embodiments.

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

The embodiment of the present disclosure provides an electronic device, the structure of which is shown in FIG. 6, and the electronic device includes:

At least one processor (processor) 600, one processor 600 is taken as an example in FIG. 6; and a memory (memory) 601, which may also include a communication interface (Communication Interface) 602 and a bus 603. Among them, the processor 600, the communication interface 602, and the memory 601 can communicate with each other through the bus 603. The communication interface 602 can be used for information transmission. The processor 600 may call the logic instructions in the memory 601 to execute the control method of the refrigeration system in the foregoing embodiment.

In addition, the above-mentioned logical instructions in the memory 601 can be implemented in the form of a software functional unit and when sold or used as an independent product, they can be stored in a computer readable storage medium.

As a computer-readable storage medium, the memory 601 can be used to store software programs and computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 600 executes functional applications and data processing by running software programs, instructions, and modules stored in the memory 601, that is, realizes the control method of the refrigeration system in the foregoing method embodiment.

The memory 601 may include a program storage area and a data storage area, where the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 601 may include a high-speed random access memory, and may also include a non-volatile memory.

The technical solutions of the embodiments of the present disclosure can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which can be a personal computer, a server, or a network). Equipment, etc.) execute all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage medium may be a non-transitory storage medium, including: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc. A medium that can store program codes, or it can be a transient storage medium.

The above description and drawings fully illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process, and other changes. The embodiments only represent possible changes. Unless explicitly required, individual components and functions are optional, and the order of operations can be changed. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The scope of the embodiments of the present disclosure includes the entire scope of the claims and all available equivalents of the claims. When 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 element. For example, without changing the meaning of the description, the first element can be called the second element, and likewise, the second element can be called the first element, as long as all occurrences of the "first element" are renamed consistently and all occurrences "Second component" can be renamed consistently. The first element and the second element are both elements, but they may not be the same element. Moreover, the terms used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates otherwise, the singular forms of "a" (a), "one" (an) and "the" (the) are intended to also include plural forms . Similarly, the term "and/or" as used in this application refers to any and all possible combinations of one or more of the associated lists. In addition, when used in this application, the term "comprise" (comprise) and its variants "comprises" and/or including (comprising) and the like refer to the stated features, wholes, steps, operations, elements, and/or The existence of components does not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and/or groups of these. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other same elements in the process, method, or device including the element. In this article, each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method parts disclosed in the embodiments, see the descriptions in the method parts for relevant points.

Those skilled in the art may be aware that the units and algorithm steps of the examples described in the embodiments disclosed in this specification can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software may depend on the specific application and design constraint conditions of the technical solution. The technicians may use different methods for each specific application to realize the described functions, but such realization should not be considered as going beyond the scope of the embodiments of the present disclosure. The technicians can clearly understand that, for the convenience and conciseness of the description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which is not repeated here.

In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units may only be a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined. Or it can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units can be selected to implement this embodiment according to actual needs. In addition, the 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 may be integrated into one unit.

The flowcharts and block diagrams in the drawings show the possible implementation architecture, functions, and operations of the system, method, and computer program product according to the embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, program segment, or part of the code, and the module, program segment, or part of the code contains one or more functions for realizing the specified logical function. Executable instructions. In some alternative implementations, the functions marked in the block may also occur in a different order from the order marked in the drawings. For example, two consecutive blocks can actually be executed in parallel, and they can sometimes be executed in the reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the drawings, the operations or steps corresponding to different blocks can also occur in a different order than that disclosed in the description, and sometimes there is no specific operation or step between different operations or steps. order. For example, two consecutive operations or steps can actually be performed substantially in parallel, and they can sometimes be performed in the reverse order, depending on the functions involved. Each block in the block diagram and/or flowchart, and the combination of the blocks in the block diagram and/or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by dedicated hardware Realized in combination with computer instructions.

Claims (10)

1. A control method of a refrigeration system, said refrigeration system comprising a refrigerant circulation loop composed mainly of a condenser for external heat exchange, an evaporator for internal heat exchange, a compressor and a throttling device, characterized in that the refrigeration The system also includes a regenerator, wherein the first regenerative cavity of the regenerator is connected in series with the refrigerant pipe section between the condenser and the throttling device, and the second regenerative cavity is connected to the evaporator and The refrigerant pipe sections between the compressors are connected in series;

   The control method includes:

   Acquiring the suction temperature of the compressor and the outlet temperature of the condenser during the operation of the refrigeration system;

   Determining the degree of refrigerant subcooling at the refrigerant outlet of the condenser;

   The flow opening degree of the throttling device is controlled and adjusted according to the suction temperature of the compressor, the temperature of the outlet of the condenser, and the degree of refrigerant subcooling of the refrigerant outlet of the condenser.
2. The control method according to claim 1, wherein the control method further comprises: obtaining the intermediate refrigerant temperature and the refrigerant outlet temperature of the condenser; and the determining the refrigerant subcooling degree of the refrigerant outlet of the condenser includes:

   Calculate the temperature difference between the temperature of the intermediate refrigerant of the condenser and the temperature of the refrigerant outlet to obtain the degree of refrigerant supercooling at the refrigerant outlet of the condenser;

   According to the suction temperature of the compressor, the temperature of the condenser outlet, and the refrigerant subcooling degree of the condenser outlet, controlling and adjusting the flow opening of the throttling device includes:

   Calculating the temperature difference between the outlet temperature of the refrigerant of the condenser and the suction temperature of the compressor;

   According to the temperature difference and the preset first difference threshold, the refrigerant supercooling degree of the refrigerant outlet and the preset supercooling threshold, the flow opening degree of the throttling device is controlled and adjusted.
3. The control method according to claim 2, wherein the temperature difference and a preset first difference threshold, the degree of refrigerant supercooling at the outlet of the condenser and the preset supercooling threshold are based on the temperature difference. Controlling and adjusting the flow opening of the throttling device includes:

   When the temperature difference is greater than the preset first difference threshold, or the refrigerant supercooling degree of the refrigerant outlet is less than the preset supercooling threshold, control to reduce the flow rate of the throttling device. degree.
4. The control method according to claim 2, wherein the temperature difference is based on the temperature difference and a preset first difference threshold, the refrigerant supercooling degree at the condenser outlet and the preset supercooling threshold, Controlling and adjusting the flow opening of the throttling device includes:

   When the temperature difference is less than the preset first difference threshold, and the refrigerant supercooling degree of the refrigerant outlet is greater than the preset supercooling threshold, control to increase the flow rate of the throttling device. degree.
5. The control method according to claim 2, wherein the control is performed based on the temperature difference and a preset first difference threshold, the refrigerant supercooling degree of the refrigerant outlet and the preset supercooling threshold Adjusting the flow opening of the throttling device includes:

   When the temperature difference is equal to the preset first difference threshold, and the refrigerant supercooling degree at the condenser outlet is greater than the preset supercooling threshold, the flow opening degree of the throttling device is maintained constant.
6. The control method according to claim 2, wherein:

   The control method further includes: determining to reduce or increase the opening adjustment rate of the throttle device based on the absolute value of the temperature deviation between the temperature difference and the preset first difference threshold.
7. A refrigeration system, the refrigeration system includes a refrigerant circulation circuit mainly composed of a condenser for external heat exchange, an evaporator for internal heat exchange, a compressor, and a throttling device, wherein the refrigeration system also includes The regenerator, wherein the first regenerative cavity of the regenerator is connected in series with the refrigerant pipe section between the condenser and the throttling device, and the second regenerative cavity is connected with the evaporator and the compressor The refrigerant pipe sections between the machines are connected in series;

   The refrigeration system also includes:

   The first temperature sensor is used to obtain the suction temperature of the compressor during the operation of the refrigeration system;

   The second temperature sensor is used to obtain the refrigerant temperature at the outlet of the condenser during the operation of the refrigeration system;

   A controller for determining the degree of refrigerant supercooling at the refrigerant outlet of the condenser;

   The flow opening degree of the throttling device is controlled and adjusted according to the suction temperature of the compressor, the temperature of the outlet of the condenser, and the degree of refrigerant subcooling of the refrigerant outlet of the condenser.
8. The refrigeration system according to claim 7, wherein the refrigeration system further comprises:

   The third temperature sensor is used to obtain the temperature of the intermediate refrigerant of the condenser;

   The controller is specifically used to calculate the temperature difference between the temperature of the intermediate refrigerant of the condenser and the temperature of the refrigerant outlet to obtain the degree of refrigerant supercooling at the refrigerant outlet of the condenser;

   The controller is also specifically used for:

   Calculating the temperature difference between the refrigerant temperature at the outlet of the condenser and the suction temperature of the compressor;

   According to the temperature difference and the preset first difference threshold, the refrigerant supercooling degree of the refrigerant outlet and the preset supercooling threshold, the flow opening degree of the throttling device is controlled and adjusted.
9. The refrigeration system according to claim 8, wherein the controller is specifically configured to:

   When the temperature difference is greater than the preset first difference threshold, or the refrigerant supercooling degree of the refrigerant outlet is less than the preset supercooling threshold, control to reduce the flow rate of the throttling device. degree.
10. A freezer device, characterized in that the freezer device has the refrigeration system according to any one of claims 7 to 9.

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