Refrigeration system and control method and control device therefor, and refrigeration apparatus

Abstract

Provided in the present application are a refrigeration system and a control method and control device therefor, and a refrigeration apparatus. The refrigeration system comprises: a compressor; a condenser; a freezing evaporator, which cools a freezing chamber; a refrigerating evaporator, which cools a refrigerating chamber; a first pipeline assembly, which brings the compressor, the freezing evaporator and the refrigerating evaporator into communication with one another; a second pipeline assembly, which connects the condenser to the compressor and the freezing evaporator; a third pipeline assembly, which connects the refrigerating evaporator to the second pipeline assembly; a first three-way valve, which is connected to the first pipeline assembly and the second pipeline assembly; a second three-way valve, which is arranged on the first pipeline assembly; and a third three-way valve, which is connected to the second pipeline assembly and the third pipeline assembly, wherein in a defrosting mode, the first pipeline assembly is opened, the first three-way valve blocks the second pipeline assembly from the first pipeline assembly, and the third three-way valve blocks the third pipeline assembly from the second pipeline assembly. The method can prevent the temperature in the refrigerating chamber from rising back up during defrosting, and prevent the temperature of a side plate from being too low due to a low-temperature refrigerant in the condenser.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese Patent Application No. 202311463948.6 filed with the China National Intellectual Property Administration on November 06, 2023 and entitled "REFRIGERATION SYSTEM AND CONTROL METHOD AND CONTROL DEVICE THEREFOR, AND REFRIGERATION APPARATUS", the entire contents of which are herein incorporated by reference.FIELD

[0002] The present application relates to the technical field of household appliances, and specifically relates to a refrigeration system and a control method and a control device therefor, and a refrigeration apparatus.BACKGROUND

[0003] The refrigeration system of a refrigerator comprises a compressor, a condenser, a freezing evaporator and a refrigerating evaporator. The prior art usually defrosts the freezing evaporator by electric heating, while this causes the temperatures of a freezing chamber and a refrigerating chamber to rise and brings about high power consumption.SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art or related art.

[0005] Thus, a first purpose of the present application is to provide a refrigeration system.

[0006] A second purpose of the present application is to provide a refrigeration apparatus.

[0007] A third purpose of the present application is to provide a control method for a refrigeration system.

[0008] A fourth purpose of the present application is to provide a control device of a refrigeration system.

[0009] A fifth purpose of the present application is to provide a refrigeration apparatus.

[0010] A sixth purpose of the present application is to provide a computer-readable storage medium.

[0011] To achieve at least one of the above purposes, according to a first aspect of the present application, a refrigeration system is provided, the refrigeration system is used for a refrigeration apparatus, and the refrigeration apparatus comprises a refrigerating chamber and a freezing chamber; the refrigeration system comprises: a compressor, a condenser, a freezing evaporator configured to cool the freezing chamber, a refrigerating evaporator configured to cool the refrigerating chamber, a first pipeline assembly configured to communicate the compressor, the freezing evaporator and the refrigerating evaporator, a second pipeline assembly configured to connect the condenser to the compressor and the freezing evaporator, a third pipeline assembly configured to connect the refrigerating evaporator to the second pipeline assembly, a first three-way valve connected to the first pipeline assembly and the second pipeline assembly, a second three-way valve provided on the first pipeline assembly, and a third three-way valve connected to the second pipeline assembly and the third pipeline assembly; wherein, in a defrosting mode, the first three-way valve and the second three-way valve open the first pipeline assembly, the first three-way valve blocks the second pipeline assembly from the first pipeline assembly, and the third three-way valve blocks the third pipeline assembly from the second pipeline assembly, and a refrigerant in the refrigeration system circulates sequentially among the compressor, the freezing evaporator and the refrigerating evaporator.

[0012] The refrigeration system provided in the present application can be used in a refrigeration apparatus, and the refrigeration apparatus may be a refrigerator. In some embodiments, the refrigeration apparatus comprises the refrigerating chamber and the freezing chamber, the refrigerating chamber is configured to refrigerate food ingredients, the freezing chamber is configured to freeze food ingredients, and the temperature of the refrigerating chamber is higher than the temperature of the freezing chamber. The refrigeration system is configured to adjust the temperatures of the refrigerating chamber and the freezing chamber, to keep the refrigerating chamber and the freezing chamber within a preset low temperature range. The refrigeration system is defined below.

[0013] The refrigeration system comprises the compressor, the condenser, the freezing evaporator and the refrigerating evaporator, wherein, the freezing evaporator is configured to cool the freezing chamber, and the refrigerating evaporator is configured to cool the refrigerating chamber. The refrigerant is provided in the refrigeration system, and the refrigerant can flow among the compressor, the condenser, the freezing evaporator and the refrigerating evaporator to realize cooling and refrigerating the freezing chamber and the refrigerating chamber. Furthermore, to bring the compressor, the condenser, the freezing evaporator and the refrigerating evaporator into communication with one another, the present application provides the first pipeline assembly, the second pipeline assembly and the third pipeline assembly in the refrigeration system. Wherein, the first pipeline assembly is configured to bring the compressor, the freezing evaporator and the refrigerating evaporator into communication, and the refrigerant can circulate among the compressor, the freezing evaporator and the refrigerating evaporator through the first pipeline assembly. The second pipeline assembly is configured to connect the condenser to the compressor and the freezing evaporator, to enable the condenser to be in communication with the compressor and the freezing evaporator, and further enable the refrigerant to circulate among the compressor, the condenser and the freezing evaporator through the first pipeline assembly and the second pipeline assembly. The third pipeline assembly is configured to connect the refrigerating evaporator to the second pipeline assembly, to enable the refrigerating evaporator to be in communication with the compressor and the condenser, and further enable the refrigerant to circulate among the compressor, the refrigerating evaporator and the condenser through the first pipeline assembly, the second pipeline assembly and the third pipeline assembly.

[0014] Furthermore, the refrigeration apparatus to which the refrigeration system is applied has a plurality of operating modes, which in some embodiments comprise a defrosting mode, a freezing mode and a refrigerating mode. It can be understood that after the freezing evaporator is used for a long time, a large amount of frost will be generated on the surface of the freezing evaporator. In order not to affect the operation of the freezing evaporator, it is necessary to defrost the freezing evaporator, and the refrigeration apparatus can be made to enter the defrosting mode at this time. In the defrosting mode, the compressor is in communication with the refrigerating evaporator and the freezing evaporator, and the compressor, the refrigerating evaporator and the freezing evaporator are isolated from the condenser. The refrigerant circulates sequentially among the compressor, the freezing evaporator and the refrigerating evaporator, and the refrigerant does not flow through the condenser. In some embodiments, the refrigerant discharged from the compressor is a high-temperature and high-pressure gas. The high-temperature and high-pressure gaseous refrigerant flows into the freezing evaporator through the first pipeline assembly, and the refrigerant releases heat in the coil of the freezing evaporator to enable the freezing evaporator to perform defrosting. The temperature of the gaseous refrigerant decreases after heat release, and the refrigerant enters the refrigerating evaporator through the first pipeline assembly. The low-temperature refrigerant absorbs heat in the refrigerating evaporator, to achieve the effect of cooling the refrigerating chamber or keeping the low temperature of the refrigerating chamber.

[0015] Furthermore, in the defrosting mode, in order to make the refrigerant only flow among the compressor, the freezing evaporator and the refrigerating evaporator and prevent the refrigerant from flowing to the condenser, the present application provides the first three-way valve, the second three-way valve and the third three-way valve in refrigeration system. By controlling the opening and closing states of different ports of the first three-way valve, the second three-way valve and the third three-way valve, different connection relationships among the compressor, the freezing evaporator, the refrigerating evaporator and the condenser are realized. In some embodiments, the first three-way valve is connected to the first pipeline assembly and the second pipeline assembly, the second three-way valve is disposed on the first pipeline assembly, and the third three-way valve is connected to the second pipeline assembly and the third pipeline assembly. In the defrosting mode, the first three-way valve and the second three-way valve open the first pipeline assembly, the first three-way valve blocks the second pipeline assembly from the first pipeline assembly, and the third three-way valve blocks the third pipeline assembly from the second pipeline assembly, to make the refrigerant in the refrigeration system circulate sequentially among the compressor, the freezing evaporator and the refrigerating evaporator.

[0016] The above refrigeration system according to the present application may further comprise the following distinguishing technical features:

[0017] In some technical solutions, exemplarily, the first pipeline assembly comprises: a compressor exhaust pipe, two ends of the compressor exhaust pipe being respectively connected to the compressor and an inlet of the first three-way valve; a freezing evaporator inlet pipe; a freezing evaporator connecting pipe connected to the freezing evaporator, two ends of the freezing evaporator inlet pipe being respectively connected to a first outlet of the first three-way valve and the freezing evaporator connecting pipe; a freezing evaporator outlet pipe, two ends of the freezing evaporator outlet pipe being respectively connected to the freezing evaporator and the refrigerating evaporator; a refrigerating evaporator outlet pipe, two ends of the refrigerating evaporator outlet pipe being respectively connected to the refrigerating evaporator and a first inlet of the second three-way valve; a compressor inlet pipe, two ends of the compressor inlet pipe being respectively connected to the outlet of the second three-way valve and the compressor; wherein, in the defrosting mode, the inlet of the first three-way valve and the first outlet of the first three-way valve are opened, and the first inlet of the second three-way valve and the outlet of the second three-way valve are opened.

[0018] In the technical solutions, the first pipeline assembly is defined. The first pipeline assembly comprises the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator outlet pipe, the refrigerating evaporator outlet pipe and the compressor inlet pipe.

[0019] In some embodiments, the first three-way valve comprises an inlet, a first outlet and a second outlet. Two ends of the compressor exhaust pipe are respectively connected to the compressor and the inlet of the first three-way valve, and the refrigerant discharged from the compressor flows to the inlet of the first three-way valve through the compressor exhaust pipe. The freezing evaporator connecting pipe is connected to the freezing evaporator, and two ends of the freezing evaporator inlet pipe are respectively connected to the first outlet of the first three-way valve and the freezing evaporator. When the inlet of the first three-way valve and the first outlet of the first three-way valve are opened, the refrigerant flows out from the first outlet of the first three-way valve, sequentially passes through the freezing evaporator inlet pipe and the freezing evaporator connecting pipe, and then flows into the freezing evaporator. The high-temperature and high-pressure refrigerant dissipates heat inside the freezing evaporator to realize the defrosting effect on the freezing evaporator. Two ends of the freezing evaporator outlet pipe are respectively connected to the freezing evaporator and the refrigerating evaporator, and the refrigerant discharged from the freezing evaporator sequentially flows through the freezing evaporator outlet pipe and enters the refrigerating evaporator. The temperature of the refrigerant decreases after the refrigerant dissipates heat in the freezing evaporator, and the refrigerant with a decreased temperature can absorb heat in the refrigerating evaporator to enable the refrigerating evaporator to cool the refrigerating chamber or keep the refrigerating chamber at a low temperature. The second three-way valve comprises the first inlet, a second inlet and an outlet. Two ends of the refrigerating evaporator outlet pipe are respectively connected to the refrigerating evaporator and the first inlet of the second three-way valve, and the refrigerant flows out of the refrigerating evaporator and then flows to the first inlet of the second three-way valve through the refrigerating evaporator outlet pipe. Two ends of the compressor inlet pipe are respectively connected to the outlet of the second three-way valve and the compressor. When the first inlet of the second three-way valve and the outlet of the second three-way valve are opened, the refrigerant passes through the second three-way valve and then flows back into the compressor through the compressor inlet pipe.

[0020] In some technical solutions, exemplarily, the second pipeline assembly comprises: a condenser inlet pipe, two ends of the condenser inlet pipe being respectively connected to a second outlet of the first three-way valve and the condenser; a condenser liquid outlet pipe, two ends of the condenser liquid outlet pipe being respectively connected to the condenser and the inlet of the third three-way valve; a freezing evaporator liquid inlet pipe, two ends of the freezing evaporator liquid inlet pipe being respectively connected to the freezing evaporator and the first outlet of the third three-way valve; wherein, one end of the freezing evaporator connecting pipe is connected to the second inlet of the second three-way valve. In the freezing mode, the inlet of the first three-way valve and the second outlet of the first three-way valve are opened while the first outlet of the first three-way valve is closed, the second inlet of the second three-way valve and the outlet of the second three-way valve are opened while the first inlet of the second three-way valve is closed, and the inlet of the third three-way valve and the first outlet of the third three-way valve are opened, to make the refrigerant in the refrigeration system circulate sequentially among the compressor, the condenser and the freezing evaporator.

[0021] In the technical solutions, the structure of the second pipeline assembly is defined. The second pipeline assembly comprises the condenser inlet pipe, the condenser liquid outlet pipe and the freezing evaporator liquid inlet pipe. The first three-way valve comprises the inlet, the first outlet and the second outlet. Two ends of the condenser inlet pipe are respectively connected to the second outlet of the first three-way valve and the condenser, and the condenser can be in communication with the compressor by opening the inlet and the second outlet of the first three-way valve and closing the first outlet of the first three-way valve. When the inlet and the second outlet of the first three-way valve are opened and the first outlet of the first three-way valve is closed, the refrigerant discharged from the compressor flows into the condenser through the compressor exhaust pipe, the first three-way valve and the condenser inlet pipe. The third three-way valve comprises the inlet, the first outlet and a second outlet. Two ends of the condenser liquid outlet pipe are respectively connected to the condenser and the inlet of the third three-way valve, and the refrigerant flows out of the condenser and then flows to the inlet of the third three-way valve through the condenser liquid outlet pipe. Two ends of the freezing evaporator liquid inlet pipe are respectively connected to the freezing evaporator and the first outlet of the third three-way valve. When the first outlet and the inlet of the third three-way valve are opened and the second outlet of the third three-way valve is closed, the refrigerant flows through the freezing evaporator liquid inlet pipe through the third three-way valve and then flows to the freezing evaporator. One end of the freezing evaporator connecting pipe is connected to the second inlet of the second three-way valve, and the refrigerant flows out of the freezing evaporator and then flows to the second three-way valve through the freezing evaporator connecting pipe. Since two ends of the compressor inlet pipe are connected to the outlet of the second three-way valve and the compressor, when the second inlet of the second three-way valve and the outlet of the second three-way valve are opened and the first inlet of the second three-way valve is closed, the refrigerant flows into the compressor inlet pipe through the second three-way valve and then flows back into the compressor, to realize the circulating of the refrigerant among the compressor, the condenser and the freezing evaporator.

[0022] In some technical solutions, exemplarily, the third pipeline assembly comprises a refrigerating evaporator liquid inlet pipe, two ends of which being respectively connected to the refrigerating evaporator and the second outlet of the third three-way valve; wherein, in the refrigerating mode, the inlet of the first three-way valve and the second outlet of the first three-way valve are opened and the first outlet of the first three-way valve is closed, the first inlet of the second three-way valve and the outlet of the second three-way valve are opened and the second inlet of the second three-way valve is closed, the inlet of the third three-way valve and the second outlet of the third three-way valve are opened and the first outlet of the third three-way valve is closed, to make the refrigerant in the refrigeration system circulate sequentially among the compressor, the condenser and the refrigerating evaporator.

[0023] In the technical solutions, the structure of the third pipeline assembly is defined. The third pipeline assembly comprises the refrigerating evaporator liquid inlet pipe. The third three-way valve comprises the inlet, the first outlet and the second outlet. Two ends of the refrigerating evaporator liquid inlet pipe are respectively connected to the refrigerating evaporator and the second outlet of the third three-way valve. When the inlet of the third three-way valve and the second outlet of the third three-way valve are opened and the first outlet of the third three-way valve is closed, the refrigerant in the condenser liquid outlet pipe flows into the refrigerating evaporator through the third three-way valve. In addition, since the refrigerating evaporator is connected to the first inlet of the second three-way valve through the refrigerating evaporator outlet pipe, when the first inlet of the second three-way valve and the outlet of the second three-way valve are opened and the second inlet of the second three-way valve is closed, the refrigerant discharged from the refrigerating evaporator flows back into the compressor through the refrigerating evaporator outlet pipe, the second three-way valve and a compressor return pipe.

[0024] In some technical solutions, exemplarily, the refrigeration system further comprises: a first capillary section disposed on the freezing evaporator outlet pipe; a second capillary section disposed on the freezing evaporator liquid inlet pipe; and a third capillary section disposed on the refrigerating evaporator liquid inlet pipe.

[0025] In the technical solutions, the refrigeration system is further defined. The refrigeration system further comprises the first capillary section, the second capillary section and the third capillary section. Wherein, the first capillary section is disposed on the freezing evaporator outlet pipe. In the defrosting mode, the refrigerant discharged from the freezing evaporator flows through the first capillary section disposed on the freezing evaporator outlet pipe and then enters the refrigerating evaporator. It can be understood that the first capillary section has the function of reducing the temperature and pressure of the refrigerant. In the defrosting mode, the refrigerant discharged from the compressor is in a high-temperature and high-pressure state. The high-temperature and high-pressure refrigerant dissipates heat and cools down after entering the freezing evaporator, to achieve the defrosting effect on the freezing evaporator. The refrigerant after dissipating heat and cooling down becomes a medium-temperature and high-pressure refrigerant. The refrigerant flows through the first capillary section, and the first capillary section reduces the temperature and pressure of the refrigerant to make the refrigerant become a refrigerant in a low-temperature and low-pressure state. The refrigerant in the low-temperature and low-pressure state flows into the refrigerating evaporator to absorb heat, to enable the refrigerating evaporator to cool the refrigerating chamber or keep the low-temperature state of the refrigerating chamber, to realize the refrigeration function of the refrigerating evaporator.

[0026] Furthermore, the second capillary section is disposed on the freezing evaporator liquid inlet pipe. In the freezing mode, after the refrigerant is discharged from the condenser, it flows through the second capillary section and enters the freezing evaporator. In the process that the refrigerant flows through the second capillary section, both the temperature and the pressure decrease to a certain extent to form the refrigerant in a low-temperature and low-pressure state. The refrigerant in the low-temperature and low-pressure state flows into the freezing evaporator to absorb heat, to enable the freezing evaporator to cool the freezing chamber or keep the low-temperature state of the freezing chamber, to realize the refrigeration function of the freezing evaporator.

[0027] Furthermore, the third capillary section is disposed on the refrigerating evaporator liquid inlet pipe. In the refrigerating mode, after the refrigerant is discharged from the condenser, it flows through the third capillary section and enters the refrigerating evaporator. In the process that the refrigerant flows through the third capillary section, both the temperature and the pressure decrease to a certain extent to form the refrigerant in a low-temperature and low-pressure state. The refrigerant in the low-temperature and low-pressure state flows into the refrigerating evaporator to absorb heat, to enable the refrigerating evaporator to cool the refrigerating chamber or keep the low-temperature state of the refrigerating chamber, to realize the refrigeration function of the refrigerating evaporator.

[0028] In some technical solutions, exemplarily, the refrigeration system further comprises: a freezing fan provided adjacent to the freezing evaporator; a refrigerating fan provided adjacent to the refrigerating evaporator; and a condenser fan provided adjacent to the condenser. In the defrosting mode, the freezing fan and the condenser fan stop operating, and the refrigerating fan operates.

[0029] In the technical solutions, the refrigeration system is further defined. The refrigeration system further comprises the freezing fan, the refrigerating fan and the condenser fan. Wherein, the freezing fan is provided adjacent to the freezing evaporator. When the freezing fan is in operation, the freezing fan can generate airflow near the freezing evaporator, and the airflow passes through the freezing evaporator at a certain speed to form forced convective heat exchange, which can bring the cold energy of the freezing evaporator into the freezing chamber to refrigerate the freezing chamber. Furthermore, the refrigerating fan is provided adjacent to the refrigerating evaporator. When the refrigerating fan is in operation, the refrigerating fan can generate airflow near the refrigerating evaporator, and the airflow passes through the refrigerating evaporator at a certain speed to form forced convective heat exchange, to bring the cold energy of the refrigerating evaporator into the refrigerating chamber to refrigerate the refrigerating chamber. Furthermore, the condenser fan is provided adjacent to the condenser. When the condenser fan is in operation, the airflow generated by the condenser fan can dissipate heat for the condenser, to transfer the heat of the condenser to the external environment of the refrigeration apparatus to which the refrigeration system is applied.

[0030] Furthermore, in the defrosting mode, the freezing fan and the condenser fan stop operating, and the refrigerating fan operates to improve the defrosting effect.

[0031] In some technical solutions, exemplarily, the refrigeration system further comprises a plurality of filters which are respectively provided on the first pipeline assembly and the second pipeline assembly.

[0032] In the technical solutions, the refrigeration system is further defined. The refrigeration system further comprises the plurality of filters, which are respectively disposed on the first pipeline assembly and the second pipeline assembly. In some embodiments, the plurality of filters are respectively provided on the condenser liquid outlet pipe and the refrigerating evaporator liquid inlet pipe. The filters can filter the refrigerant, prevent impurities in the refrigerant from blocking various components and pipelines in the refrigeration system, improve the reliability of the refrigeration system, and prolong the service life of the refrigeration system.

[0033] In some technical solutions, exemplarily, the refrigeration system further comprises a controller, and the controller is electrically connected to the first three-way valve, the second three-way valve and the third three-way valve. The controller is further electrically connected to the freezing fan, the refrigerating fan and the condenser fan. The controller is used to control the opening and closing of respective ports of the first three-way valve, the second three-way valve and the third three-way valve, and control the operation of the freezing fan, the refrigerating fan and the condenser fan.

[0034] A second aspect of the present application further provides a refrigeration apparatus, which comprises the refrigeration system provided in the first aspect of the present application.

[0035] The refrigeration apparatus provided by the second aspect of the present application comprises the refrigeration system provided by the first aspect of the present application, and therefore has all the beneficial effects of the refrigeration system.

[0036] The refrigeration apparatus may be a refrigerator.

[0037] A third aspect of the present application further provides a control method for a refrigeration system, which is applied to the refrigeration system provided in the first aspect of the present application. The control method for a refrigeration system comprises: receiving a defrosting instruction, controlling a compressor, a freezing evaporator and a refrigerating evaporator to operate, controlling a first three-way valve to open a first pipeline assembly and block the first pipeline assembly from a second pipeline assembly, to bring the compressor, the freezing evaporator and the refrigerating evaporator into communication in sequence, and block a condenser from the first pipeline assembly.

[0038] The control method for a refrigeration system provided in the present application can be applied to the refrigeration system provided in the first aspect of the present application, the refrigeration system can be used in a refrigeration apparatus, and the refrigeration apparatus may be a refrigerator. In some embodiments, the refrigeration apparatus comprises a refrigerating chamber and a freezing chamber, the refrigerating chamber is configured to refrigerate food ingredients, the freezing chamber is configured to freeze food ingredients, and the temperature of the refrigerating chamber is higher than the temperature of the freezing chamber. The refrigeration system is configured to adjust the temperatures of the refrigerating chamber and the freezing chamber, to keep the refrigerating chamber and the freezing chamber within a preset low temperature range. The control method for a refrigeration system is defined below.

[0039] Firstly, the defrosting instruction is received, and then the compressor, the freezing evaporator and the refrigerating evaporator in the refrigeration system are controlled to operate. The refrigeration system comprises the first pipeline assembly configured to connect the compressor, the freezing evaporator and the refrigerating evaporator, and the technical effect of defrosting the freezing evaporator can be achieved by circulating the refrigerant among the compressor, the freezing evaporator and the refrigerating evaporator. Since the refrigeration system is provided with a plurality of pipeline assemblies, in order to realize different connection relationships among the compressor, the freezing evaporator, the refrigerating evaporator and the condenser, the present application further disposes the first three-way valve, the second three-way valve and the third three-way valve in the refrigeration system, and different connection relationships among the compressor, the freezing evaporator, the refrigerating evaporator and the condenser can be realized by controlling the opening and closing of respective ports of the first three-way valve, the second three-way valve and the third three-way valve.

[0040] In some embodiments, the first three-way valve is connected to the first pipeline assembly and the second pipeline assembly, the second three-way valve is disposed on the first pipeline assembly, and the third three-way valve is connected to the second pipeline assembly and the third pipeline assembly. After the defrosting instruction is received and the compressor, the freezing evaporator and the refrigerating evaporator are controlled to operate, the first three-way valve is controlled to open the first pipeline assembly and block the first pipeline assembly from the second pipeline assembly, to bring the compressor, the freezing evaporator and the refrigerating evaporator into communication with one another in sequence, and block the condenser from the first pipeline assembly.

[0041] In some technical solutions, exemplarily, the first pipeline assembly comprises a compressor exhaust pipe, a freezing evaporator inlet pipe, a freezing evaporator connecting pipe, a freezing evaporator outlet pipe, a refrigerating evaporator outlet pipe and a compressor inlet pipe. Controlling the first three-way valve to open the first pipeline assembly and block the first pipeline assembly from the second pipeline assembly comprises: controlling an inlet of the first three-way valve and a first outlet of the first three-way valve to open, and controlling a first inlet of the second three-way valve and an outlet of the second three-way valve to open, to bring the compressor, the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator, the freezing evaporator outlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence.

[0042] In the technical solution, the control method for a refrigeration system is further defined. The first pipeline assembly comprises the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator outlet pipe, the refrigerating evaporator outlet pipe and the compressor inlet pipe. Wherein, the compressor, the compressor exhaust pipe, the first three-way valve, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator, the freezing evaporator outlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe, the second three-way valve and the compressor inlet pipe are connected end to end in sequence. The step of controlling the first three-way valve to open the first pipeline assembly and block the first pipeline assembly from the second pipeline assembly is defined below.

[0043] The step of controlling the first three-way valve to open the first pipeline assembly and block the first pipeline assembly from the second pipeline assembly comprises: controlling the inlet of the first three-way valve and the first outlet of the first three-way valve to open, and controlling the first inlet of the second three-way valve and the outlet of the second three-way valve to open, to bring the compressor, the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator, the freezing evaporator outlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence.

[0044] In some technical solutions, exemplarily, the refrigeration system further comprises a freezing fan, a refrigerating fan and a condenser fan, the freezing fan is disposed adjacent to the freezing evaporator, the refrigerating fan is disposed adjacent to the refrigerating evaporator, and the condenser fan is disposed adjacent to the condenser. The control method for a refrigeration system further comprises: controlling the freezing fan and the condenser fan to stop operating, and controlling the refrigerating fan to operate.

[0045] In the technical solutions, the control method for a refrigeration system is further defined. The refrigeration system further comprises the freezing fan, the refrigerating fan and the condenser fan. Wherein, the freezing fan is provided adjacent to the freezing evaporator. When the freezing fan is in operation, the freezing fan can generate airflow near the freezing evaporator, and the airflow passes through the freezing evaporator at a certain speed to form forced convective heat exchange, which can bring the cold energy of the freezing evaporator into the freezing chamber to refrigerate the freezing chamber. Furthermore, the refrigerating fan is provided adjacent to the refrigerating evaporator. When the refrigerating fan is in operation, the refrigerating fan can generate airflow near the refrigerating evaporator, and the airflow passes through the refrigerating evaporator at a certain speed to form forced convective heat exchange, to bring the cold energy of the refrigerating evaporator into the refrigerating chamber to refrigerate the refrigerating chamber. Furthermore, the condenser fan is provided adjacent to the condenser. When the condenser fan is in operation, the airflow generated by the condenser fan can dissipate heat for the condenser, to transfer the heat of the condenser to the external environment of the refrigeration apparatus to which the refrigeration system is applied.

[0046] After the defrosting instruction is received and the compressor, the freezing evaporator and the refrigerating evaporator are controlled to operate, the freezing fan and the condenser fan are controlled to stop operating while the refrigerating fan is controlled to operate, and thus the defrosting effect on the freezing evaporator can be improved.

[0047] In some technical solutions, exemplarily, the second pipeline assembly comprises a condenser inlet pipe, a condenser liquid outlet pipe and a freezing evaporator liquid inlet pipe. The control method further comprises: receiving a freezing instruction; controlling the compressor, the freezing evaporator and the condenser to operate, controlling the inlet of the first three-way valve and the second outlet of the first three-way valve to open, controlling the first outlet of the first three-way valve to close, controlling the second inlet of the second three-way valve and the outlet of the second three-way valve to open, controlling the first inlet of the second three-way valve to close, and controlling the inlet of the third three-way valve and the first outlet of the third three-way valve to open, to bring the compressor, the compressor exhaust pipe, the condenser inlet pipe, the condenser, the condenser liquid outlet pipe, the freezing evaporator liquid inlet pipe, the freezing evaporator, the freezing evaporator connecting pipe and the compressor inlet pipe into communication with one another in sequence.

[0048] In the technical solutions, the control method for a refrigeration system is further defined. The refrigeration apparatus to which the refrigeration system is applied further has the freezing mode. To enter the freezing mode, it is necessary to control the opening and closing of respective ports of the first three-way valve, the second three-way valve and the third three-way valve, to bring the compressor, the condenser and the freezing evaporator into communication with one another. The second pipeline assembly comprises the condenser inlet pipe, the condenser liquid outlet pipe and the freezing evaporator liquid inlet pipe. After the freezing instruction is received and the compressor, the freezing evaporator and the condenser are controlled to operate, the inlet of the first three-way valve and the second outlet of the first three-way valve are controlled to open, the first outlet of the first three-way valve is controlled to close, the second inlet of the second three-way valve and the outlet of the second three-way valve are controlled to open, the first inlet of the second three-way valve is controlled to close, and the inlet of the third three-way valve and the first outlet of the third three-way valve are controlled to open, which can enable the compressor, the condenser and the freezing evaporator to be in communication with one another in sequence, and block the connection relationship between the refrigerating evaporator and the condenser, the freezing evaporator and the compressor.

[0049] In some technical solutions, exemplarily, the third pipeline assembly comprises a refrigerating evaporator liquid inlet pipe. The control method further comprises: receiving a refrigerating instruction, controlling the compressor, the refrigerating evaporator and the condenser to operate, controlling the inlet of the first three-way valve and the second outlet of the first three-way valve to open, controlling the first outlet of the first three-way valve to close, controlling the first inlet of the second three-way valve and the outlet of the second three-way valve to open, controlling the second inlet of the second three-way valve to close, controlling the inlet of the third three-way valve and the second outlet of the third three-way valve to open, and controlling the first outlet of the third three-way valve to close, to bring the compressor, the compressor exhaust pipe, the condenser inlet pipe, the condenser, the condenser liquid outlet pipe, the refrigerating evaporator liquid inlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence.

[0050] In the technical solutions, the control method for a refrigeration system is further defined. The refrigeration apparatus to which the refrigeration system is applied further has the refrigerating mode. To enter the refrigerating mode, it is necessary to control the opening and closing of respective ports of the first three-way valve, the second three-way valve and the third three-way valve to bring the compressor, the condenser and the refrigerating evaporator into communication with one another. The third pipeline assembly comprises the refrigerating evaporator liquid inlet pipe. After the refrigerating instruction is received and the compressor, the refrigerating evaporator and the condenser are controlled to operate, the inlet of the first three-way valve and the second outlet of the first three-way valve are controlled to open, the first outlet of the first three-way valve is controlled to close, the first inlet of the second three-way valve and the outlet of the second three-way valve are controlled to open, the second inlet of the second three-way valve is controlled to close, the inlet of the third three-way valve and the second outlet of the third three-way valve are controlled to open, and the first outlet of the third three-way valve is controlled to close, which can enable the compressor, the condenser and the refrigerating evaporator to be in communication with one another in sequence, and block the connection relationship of the freezing evaporator with the condenser, the refrigerating evaporator and the compressor.

[0051] A fourth aspect of the present application further provides a control device of a refrigeration system. The refrigeration system comprises a compressor, a freezing evaporator, a refrigerating evaporator, a first pipeline assembly, a second pipeline assembly and a first three-way valve. The control device of a refrigeration system comprises: a control module for controlling the compressor, the freezing evaporator and the refrigerating evaporator to operate; and an instruction receiving module for receiving a defrosting instruction; the control module is further configured to control the first three-way valve to open the first pipeline assembly and block the first pipeline assembly from the second pipeline assembly, to enable the compressor, the freezing evaporator and the refrigerating evaporator to be in communication with one another in sequence, and block the condenser from the first pipeline assembly.

[0052] The control device of a refrigeration system provided in the present application can be applied to a refrigeration apparatus, and the refrigeration apparatus may be a refrigerator. In some embodiments, the refrigeration apparatus comprises a refrigerating chamber and a freezing chamber, the refrigerating chamber is configured to refrigerate food ingredients, the freezing chamber is configured to freeze food ingredients, and the temperature of the refrigerating chamber is higher than the temperature of the freezing chamber. The refrigeration system is configured to adjust the temperatures of the refrigerating chamber and the freezing chamber, to keep the refrigerating chamber and the freezing chamber within a preset low temperature range. The control device of a refrigeration system is defined below.

[0053] The refrigeration system comprises the compressor, the freezing evaporator, the refrigerating evaporator, the first pipeline assembly, the second pipeline assembly and the first three-way valve. The control device of a refrigeration system comprises the control module and the instruction receiving module. The instruction receiving module is configured to receive the defrosting instruction, and the control module is configured to control the compressor, the freezing evaporator and the refrigerating evaporator to operate. The refrigeration system comprises the first pipeline assembly configured to connect the compressor, the freezing evaporator and the refrigerating evaporator, and the technical effect of defrosting the freezing evaporator can be achieved by circulating the refrigerant among the compressor, the freezing evaporator and the refrigerating evaporator. Since the refrigeration system is provided with a plurality of pipeline assemblies, in order to realize different connection relationships among the compressor, the freezing evaporator, the refrigerating evaporator and the condenser, the present application further disposes the first three-way valve, the second three-way valve and the third three-way valve in the refrigeration system, and different connection relationships among the compressor, the freezing evaporator, the refrigerating evaporator and the condenser can be realized by controlling the opening and closing of respective ports of the first three-way valve, the second three-way valve and the third three-way valve. The control module is further configured to control the opening and closing of respective ports of the first three-way valve, the second three-way valve and the third three-way valve.

[0054] The control module is further configured to control the first three-way valve to open the first pipeline assembly and block the first pipeline assembly from the second pipeline assembly, to enable the compressor, the freezing evaporator and the refrigerating evaporator to be in communication with one another in sequence, and block the condenser from the first pipeline assembly. In some embodiments, the first three-way valve is connected to the first pipeline assembly and the second pipeline assembly, the second three-way valve is disposed on the first pipeline assembly, and the third three-way valve is connected to the second pipeline assembly and the third pipeline assembly. After the defrosting instruction is received and the compressor, the freezing evaporator and the refrigerating evaporator are controlled to operate, the first three-way valve is controlled to open the first pipeline assembly and block the first pipeline assembly from the second pipeline assembly, to bring the compressor, the freezing evaporator and the refrigerating evaporator into communication with one another in sequence, and block the condenser from the first pipeline assembly.

[0055] In some technical solutions, exemplarily, the first pipeline assembly comprises a compressor exhaust pipe, a freezing evaporator inlet pipe, a freezing evaporator connecting pipe, a freezing evaporator outlet pipe, a refrigerating evaporator outlet pipe and a compressor inlet pipe. The control module is configured to control an inlet of the first three-way valve and a first outlet of the first three-way valve to open, and controlling a first inlet of the second three-way valve and an outlet of the second three-way valve to open, to bring the compressor, the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator, the freezing evaporator outlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence.

[0056] In the technical solution, the control device of a refrigeration system is further defined. The first pipeline assembly comprises the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator outlet pipe, the refrigerating evaporator outlet pipe and the compressor inlet pipe. Wherein, the compressor, the compressor exhaust pipe, the first three-way valve, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator, the freezing evaporator outlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe, the second three-way valve and the compressor inlet pipe are connected end to end in sequence. By controlling the opening and closing of respective ports of the first three-way valve and the second three-way valve, the compressor, the freezing evaporator and the refrigerating evaporator can be connected end to end through the first pipeline assembly, thus making the refrigerant circulate among the compressor, the freezing evaporator and the refrigerating evaporator to achieve the defrosting effect on the freezing compressor. The control module is configured to control the inlet of the first three-way valve and the first outlet of the first three-way valve to open and controlling the first inlet of the second three-way valve and the outlet of the second three-way valve to open, which can bring the compressor, the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator, the freezing evaporator outlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence.

[0057] In some technical solutions, exemplarily, the refrigeration system further comprises a freezing fan, a refrigerating fan and a condenser fan, the freezing fan is disposed adjacent to the freezing evaporator, the refrigerating fan is disposed adjacent to the refrigerating evaporator, and the condenser fan is disposed adjacent to the condenser. The control module is further configured to control the freezing fan and the condenser fan to stop operating, and controlling the refrigerating fan to operate.

[0058] In the technical solutions, the control device of a refrigeration system is further defined. The refrigeration system further comprises the freezing fan, the refrigerating fan and the condenser fan. Wherein, the freezing fan is provided adjacent to the freezing evaporator. When the freezing fan is in operation, the freezing fan can generate airflow near the freezing evaporator, and the airflow passes through the freezing evaporator at a certain speed to form forced convective heat exchange, which can bring the cold energy of the freezing evaporator into the freezing chamber to refrigerate the freezing chamber. Furthermore, the refrigerating fan is provided adjacent to the refrigerating evaporator. When the refrigerating fan is in operation, the refrigerating fan can generate airflow near the refrigerating evaporator, and the airflow passes through the refrigerating evaporator at a certain speed to form forced convective heat exchange, to bring the cold energy of the refrigerating evaporator into the refrigerating chamber to refrigerate the refrigerating chamber. Furthermore, the condenser fan is provided adjacent to the condenser. When the condenser fan is in operation, the airflow generated by the condenser fan can dissipate heat for the condenser, to transfer the heat of the condenser to the external environment of the refrigeration apparatus to which the refrigeration system is applied.

[0059] Furthermore, the control module is further configured to control the freezing fan and the condenser fan to stop operating and control the refrigerating fan to operate. After the defrosting instruction is received and the compressor, the freezing evaporator and the refrigerating evaporator are controlled to operate, the defrosting effect on the freezing evaporator can be improved by controlling the freezing fan and the condenser fan to stop operating while controlling the refrigerating fan to operate.

[0060] In some technical solutions, exemplarily, the second pipeline assembly comprises a condenser inlet pipe, a condenser liquid outlet pipe and a freezing evaporator liquid inlet pipe. The instruction receiving module is further configured to receive a freezing instruction; the control module is further configured to: control the compressor, the freezing evaporator and the condenser to operate; control the inlet of the first three-way valve and the second outlet of the first three-way valve to open, control the first outlet of the first three-way valve to close, control the second inlet of the second three-way valve and the outlet of the second three-way valve to open, control the first inlet of the second three-way valve to close, and control the inlet of the third three-way valve and the first outlet of the third three-way valve to open, to bring the compressor, the compressor exhaust pipe, the condenser inlet pipe, the condenser, the condenser liquid outlet pipe, the freezing evaporator liquid inlet pipe, the freezing evaporator, the freezing evaporator connecting pipe and the compressor inlet pipe into communication with one another in sequence.

[0061] In the technical solutions, the control device of a refrigeration system is further defined. The refrigeration apparatus to which the refrigeration system is applied further has a freezing mode. To enter the freezing mode, it is necessary to control the opening and closing of respective ports of the first three-way valve, the second three-way valve and the third three-way valve, to bring the compressor, the condenser and the freezing evaporator into communication with one another. The second pipeline assembly comprises the condenser inlet pipe, the condenser liquid outlet pipe and the freezing evaporator liquid inlet pipe. The instruction receiving module is further configured to receive a freezing instruction; the control module is further configured to: control the compressor, the freezing evaporator and the condenser to operate; control the inlet of the first three-way valve and the second outlet of the first three-way valve to open, control the first outlet of the first three-way valve to close, control the second inlet of the second three-way valve and the outlet of the second three-way valve to open, control the first inlet of the second three-way valve to close, and control the inlet of the third three-way valve and the first outlet of the third three-way valve to open, to bring the compressor, the compressor exhaust pipe, the condenser inlet pipe, the condenser, the condenser liquid outlet pipe, the freezing evaporator liquid inlet pipe, the freezing evaporator, the freezing evaporator connecting pipe and the compressor inlet pipe into communication with one another in sequence.

[0062] In some technical solutions, exemplarily, the third pipeline assembly comprises a refrigerating evaporator liquid inlet pipe. The instruction receiving module is further configured to receive the refrigerating instruction; the control module is further configured to: control the compressor, the refrigerating evaporator and the condenser to operate, control the inlet of the first three-way valve and the second outlet of the first three-way valve to open, control the first outlet of the first three-way valve to close, control the first inlet of the second three-way valve and the outlet of the second three-way valve to open, control the second inlet of the second three-way valve to close, control the inlet of the third three-way valve and the second outlet of the third three-way valve to open, and control the first outlet of the third three-way valve to close, to bring the compressor, the compressor exhaust pipe, the condenser inlet pipe, the condenser, the condenser liquid outlet pipe, the refrigerating evaporator liquid inlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence.

[0063] In the technical solutions, the control device of a refrigeration system is further defined. The refrigeration apparatus to which the refrigeration system is applied further has a refrigerating mode. To enter the refrigerating mode, it is necessary to control the opening and closing of respective ports of the first three-way valve, the second three-way valve and the third three-way valve to bring the compressor, the condenser and the refrigerating evaporator into communication with one another. The third pipeline assembly comprises the refrigerating evaporator liquid inlet pipe. The instruction receiving module is further configured to receive the refrigerating instruction; the control module is further configured to: control the compressor, the refrigerating evaporator and the condenser to operate, control the inlet of the first three-way valve and the second outlet of the first three-way valve to open, control the first outlet of the first three-way valve to close, control the first inlet of the second three-way valve and the outlet of the second three-way valve to open, control the second inlet of the second three-way valve to close, control the inlet of the third three-way valve and the second outlet of the third three-way valve to open, and control the first outlet of the third three-way valve to close, to bring the compressor, the compressor exhaust pipe, the condenser inlet pipe, the condenser, the condenser liquid outlet pipe, the refrigerating evaporator liquid inlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence.

[0064] A fifth aspect of the present application further provides a refrigeration apparatus, comprising the control device of a refrigeration system provided in the fourth aspect of the present application.

[0065] The refrigeration apparatus provided in the fifth aspect of the present application comprises the control device of a refrigeration system provided in the fourth aspect of the present application, and thus has all the beneficial effects of the control device of a refrigeration system.

[0066] A sixth aspect of the present application further provides a computer-readable storage medium, and programs or instructions are stored in the computer-readable storage medium; when the programs or instructions are executed by a processor, the steps of the control method for a refrigeration system provided in the third aspect of the present application are achieved, and therefore, the computer-readable storage medium has all the beneficial technical effects of the control method for a refrigeration system in any possible technical solution of the above third aspect.

[0067] The additional aspects and advantages of the present application will become apparent in the following description or may be learned through practice of the present application.BRIEF DESCRIPTION OF THE DRAWINGS

[0068] The above-mentioned and / or additional aspects and advantages of the present application will become apparent and easily understandable from the description of the embodiments in combination with the following accompanying drawings, wherein: FIG. 1 is a first schematic view of the structure of a refrigeration system according to an embodiment of the present application; FIG. 2 is a second schematic view of the structure of a refrigeration system according to an embodiment of the present application; FIG. 3 is a third schematic view of the structure of a refrigeration system according to an embodiment of the present application; FIG. 4 is a first schematic flow chart of a control method for a refrigeration system according to an embodiment of the present application; FIG. 5 is a second schematic flow chart of a control method for a refrigeration system according to an embodiment of the present application; FIG. 6 is a third schematic flow chart of a control method for a refrigeration system according to an embodiment of the present application; FIG. 7 is a fourth schematic flow chart of a control method for a refrigeration system according to an embodiment of the present application; FIG. 8 is a fifth schematic flow chart of a control method for a refrigeration system according to an embodiment of the present application; and FIG. 9 is a block diagram of the structure of a control device of a refrigeration system according to an embodiment of the present application.

[0069] Wherein, the corresponding relationships between the reference signs and the component names in FIG. 1 to FIG. 3, and FIG. 9 are as follows: 100 refrigeration system, 110 compressor, 120 condenser, 130 freezing evaporator, 140 refrigerating evaporator, 150 first pipeline assembly, 151 compressor exhaust pipe, 152 freezing evaporator inlet pipe, 153 freezing evaporator connecting pipe, 154 freezing evaporator outlet pipe, 155 refrigerating evaporator outlet pipe,156 compressor inlet pipe, 160 second pipeline assembly, 161 condenser inlet pipe, 162 condenser liquid outlet pipe, 163 freezing evaporator liquid inlet pipe, 170 third pipeline assembly, 171 refrigerating evaporator liquid inlet pipe, 180 filter, 210 first three-way valve, 211 inlet of the first three-way valve, 212 first outlet of the first three-way valve, 213 second outlet of the first three-way valve, 220 second three-way valve, 221 first inlet of the second three-way valve, 222 second inlet of the second three-way valve, 223 outlet of the second three-way valve, 230 third three-way valve, 231 inlet of the third three-way valve, 232 first outlet of the third three-way valve, 233 second outlet of the third three-way valve, 240 refrigerating fan, 250 freezing fan, 260 condenser fan, 270 first capillary section, 280 second capillary section,290 third capillary section, 300 control device of refrigeration system, 310 instruction receiving module, 320 control module.DETAILED DESCRIPTION OF THE APPLICATION

[0070] To more clearly understand the above purposes, features and advantages of the present application, the present application will be further detailed hereinafter in combination with the accompanying drawings and embodiments. It should be indicated that in the case of no conflict, the embodiments and the features in the embodiments of the present application can be combined with each other.

[0071] Many details are illustrated in the following description for the convenience of a thorough understanding of the present application, but the present application can further be implemented using other embodiments other than these described herein. Therefore, the protection scope of the present application is not limited to the specific embodiments disclosed in the following text.

[0072] A refrigeration system 100 and a control method for a refrigeration system and a control device 300 of a refrigeration system, a refrigeration apparatus and a computer-readable storage medium according to some embodiments of the present application will be detailed hereinafter by referring to FIG. 1 to FIG. 9.

[0073] According to an embodiment of the present application, as shown in FIG. 1, the present application provides a refrigeration system 100, the refrigeration system 100 is used for a refrigeration apparatus, and the refrigeration apparatus comprises a refrigerating chamber and a freezing chamber. The refrigeration system 100 comprises: a compressor 110, a condenser 120, a freezing evaporator 130 configured to cool a freezing chamber, a refrigerating evaporator 140 configured to cool a refrigerating chamber, a first pipeline assembly 150 configured to communicate the compressor 110, the freezing evaporator 130 and the refrigerating evaporator 140, a second pipeline assembly 160 configured to connect the condenser 120 to the compressor 110 and the freezing evaporator 130, a third pipeline assembly 170 configured to connect the refrigerating evaporator 140 to the second pipeline assembly 160, a first three-way valve 210 connected to the first pipeline assembly 150 and the second pipeline assembly 160, a second three-way valve 220 provided on the first pipeline assembly 150, and a third three-way valve 230 connected to the second pipeline assembly 160 and the third pipeline assembly 170; wherein, in a defrosting mode, the first three-way valve 210 and the second three-way valve 220 open the first pipeline assembly 150, the first three-way valve 210 blocks the second pipeline assembly 160 from the first pipeline assembly 150, and the third three-way valve 230 blocks the third pipeline assembly 170 from the second pipeline assembly 160, and a refrigerant in the refrigeration system 100 circulates sequentially among the compressor 110, the freezing evaporator 130 and the refrigerating evaporator 140.

[0074] The refrigeration system 100 provided in the present application can be used in a refrigeration apparatus, and the refrigeration apparatus may be a refrigerator. In some embodiments, the refrigeration apparatus comprises the refrigerating chamber and the freezing chamber, the refrigerating chamber is configured to refrigerate food ingredients, the freezing chamber is configured to freeze food ingredients, and the temperature of the refrigerating chamber is higher than the temperature of the freezing chamber. The refrigeration system 100 is configured to adjust the temperatures of the refrigerating chamber and the freezing chamber, to keep the refrigerating chamber and the freezing chamber within a preset low temperature range. The refrigeration system 100 is defined below.

[0075] The refrigeration system 100 comprises the compressor 110, the condenser 120, the freezing evaporator 130 and the refrigerating evaporator 140, wherein, the freezing evaporator 130 is configured to cool the freezing chamber, and the refrigerating evaporator 140 is configured to cool the refrigerating chamber. The refrigerant is provided in the refrigeration system 100, and the refrigerant can flow among the compressor 110, the condenser 120, the freezing evaporator 130 and the refrigerating evaporator 140 to realize cooling and refrigerating the freezing chamber and the refrigerating chamber. Furthermore, to bring the compressor 110, the condenser 120, the freezing evaporator 130 and the refrigerating evaporator 140 into communication with one another, the present application provides the first pipeline assembly 150, the second pipeline assembly 160 and the third pipeline assembly 170 in the refrigeration system 100. Wherein, the first pipeline assembly 150 is configured to communicate the compressor 110, the freezing evaporator 130 and the refrigerating evaporator 140, and the refrigerant can circulate among the compressor 110, the freezing evaporator 130 and the refrigerating evaporator 140 through the first pipeline assembly 150. The second pipeline assembly 160 is configured to connect the condenser 120 to the compressor 110 and the freezing evaporator 130, to enable the condenser 120 to be in communication with the compressor 110 and the freezing evaporator 130, and further enable the refrigerant to circulate among the compressor 110, the condenser 120 and the freezing evaporator 130 through the first pipeline assembly 150 and the second pipeline assembly 160. The third pipeline assembly 170 is configured to connect the refrigerating evaporator 140 to the second pipeline assembly 160, to enable the refrigerating evaporator 140 to be in communication with the compressor 110 and the condenser 120, and further enable the refrigerant to circulate among the compressor 110, the refrigerating evaporator 140 and the condenser 120 through the first pipeline assembly 150, the second pipeline assembly 160 and the third pipeline assembly 170.

[0076] Furthermore, the refrigeration apparatus to which the refrigeration system 100 is applied has a plurality of operating modes, which in some embodiments comprise a defrosting mode, a freezing mode and a refrigerating mode. It can be understood that after the freezing evaporator 130 is used for a long time, a large amount of frost will be generated on the surface of the freezing evaporator 130. In order not to affect the operation of the freezing evaporator 130, it is necessary to defrost the freezing evaporator 130, and the refrigeration apparatus can be made to enter the defrosting mode at this time. In the defrosting mode, the compressor 110 is in communication with the refrigerating evaporator 140 and the freezing evaporator 130, and the compressor 110, the refrigerating evaporator 140 and the freezing evaporator 130 are isolated from the condenser 120. The refrigerant circulates sequentially among the compressor 110, the freezing evaporator 130 and the refrigerating evaporator 140, and the refrigerant does not flow through the condenser 120. In some embodiments, the refrigerant discharged from the compressor 110 is a high-temperature and high-pressure gas. The high-temperature and high-pressure gaseous refrigerant flows into the freezing evaporator 130 through the first pipeline assembly 150, and the refrigerant releases heat in the coil of the freezing evaporator 130 to enable the freezing evaporator 130 to perform defrosting. The temperature of the gaseous refrigerant decreases after heat release, and the refrigerant enters the refrigerating evaporator 140 through the first pipeline assembly 150. The low-temperature refrigerant absorbs heat in the refrigerating evaporator 140, to achieve the effect of cooling the refrigerating chamber or keeping the low temperature of the refrigerating chamber.

[0077] Furthermore, in the defrosting mode, in order to make the refrigerant only flow among the compressor 110, the freezing evaporator 130 and the refrigerating evaporator 140 and prevent the refrigerant from flowing to the condenser 120, the present application provides the first three-way valve 210, the second three-way valve 220 and the third three-way valve 230 in refrigeration system 100. By controlling the opening and closing states of different ports of the first three-way valve 210, the second three-way valve 220 and the third three-way valve 230, different connection relationships among the compressor 110, the freezing evaporator 130, the refrigerating evaporator 140 and the condenser 120 are realized. In some embodiments, the first three-way valve 210 is connected to the first pipeline assembly 150 and the second pipeline assembly 160, the second three-way valve 220 is disposed on the first pipeline assembly 150, and the third three-way valve 230 is connected to the second pipeline assembly 160 and the third pipeline assembly 170. In the defrosting mode, the first three-way valve 210 and the second three-way valve 220 open the first pipeline assembly 150, the first three-way valve 210 blocks the second pipeline assembly 160 from the first pipeline assembly 150, and the third three-way valve 230 blocks the third pipeline assembly 170 from the second pipeline assembly 160, to make the refrigerant in the refrigeration system 100 circulate sequentially among the compressor 110, the freezing evaporator 130 and the refrigerating evaporator 140. The arrow direction in FIG. 1 is the flowing direction of the refrigerant.

[0078] By arranging the first pipeline assembly 150, the second pipeline assembly 160 and the third pipeline assembly 170 in the refrigeration system 100, the connection among the compressor 110, the freezing evaporator 130, the refrigerating evaporator 140 and the condenser 120 can be realized through the above pipeline assemblies. By arranging the first three-way valve 210, the second three-way valve 220 and the third three-way valve 230 in the refrigeration system 100, the connection and disconnection of the first pipeline assembly 150, the second pipeline assembly 160 and the third pipeline assembly 170 can be realized through the above three-way valves, and the connection relationship between the above pipeline assemblies can be adjusted. In the defrosting mode, by controlling the opening and closing states of respective ports of the first three-way valve 210, the second three-way valve 220 and the third three-way valve 230, the connection among the compressor 110, the freezing evaporator 130 and the refrigerating evaporator 140 can be realized, and the connection of the condenser 120 with the compressor 110, the freezing evaporator 130 and the refrigerating evaporator 140 is blocked, and the refrigerant only flows among the compressor 110, the freezing evaporator 130 and the refrigerating evaporator 140 and is prevented from flowing to the condenser 120. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 110 can dissipate heat after flowing into the freezing evaporator 130, thus realizing defrosting of the freezing evaporator 130. Adopting the above method for defrosting the freezing evaporator 130 can improve the defrosting efficiency, reduce energy consumption, lower the temperature difference of the freezing chamber, and prolong a food preservation period; in addition, cold energy can be continuously supplied to the refrigerating chamber during defrosting, which lowers or keeps the temperature of the refrigerating chamber at the same time and avoids temperature rise of the refrigerating chamber during defrosting; meanwhile, the refrigerant does not flow through the condenser 120 during defrosting, and the condenser 120 of most refrigerators is attached to both sides of side plates of the refrigerator, and thus this can avoid water condensation caused by an excessively low temperature of the side plates due to the low-temperature refrigerant in the condenser 120, then avoid customer complaints, and improve product quality and reliability.

[0079] In some embodiments, exemplarily, as shown in FIG. 1, the first pipeline assembly 150 comprises: a compressor exhaust pipe 151, two ends of the compressor exhaust pipe 151 being respectively connected to the compressor 110 and an inlet 211 of the first three-way valve; a freezing evaporator inlet pipe 152; a freezing evaporator connecting pipe 153 connected to the freezing evaporator 130, two ends of the freezing evaporator inlet pipe 152 being respectively connected to a first outlet 212 of the first three-way valve and the freezing evaporator connecting pipe 153; a freezing evaporator outlet pipe 154, two ends of the freezing evaporator outlet pipe154being respectively connected to the freezing evaporator 130 and the refrigerating evaporator 140; a refrigerating evaporator outlet pipe 155, two ends of the refrigerating evaporator outlet pipe 155 being respectively connected to the refrigerating evaporator 140 and a first inlet 221 of the second three-way valve; a compressor inlet pipe 156, two ends of the compressor inlet pipe 156 being respectively connected to an outlet 223 of the second three-way valve and the compressor 110; wherein, in the defrosting mode, the inlet 211 of the first three-way valve and the first outlet 212 of the first three-way valve are opened, and the first inlet 221 of the second three-way valve and the outlet of the second three-way valve are opened.

[0080] In the embodiments, the first pipeline assembly 150 is defined. The first pipeline assembly 150 comprises the compressor exhaust pipe 151, the freezing evaporator inlet pipe 152, the freezing evaporator connecting pipe 153, the freezing evaporator outlet pipe 154, the refrigerating evaporator outlet pipe 155 and the compressor inlet pipe 156.

[0081] In some embodiments, the first three-way valve 210 comprises the inlet, the first outlet and a second outlet. Two ends of the compressor exhaust pipe 151 are respectively connected to the compressor 110 and the inlet 211 of the first three-way valve, and the refrigerant discharged from the compressor 110 flows to the inlet 211 of the first three-way valve through the compressor exhaust pipe 151. The freezing evaporator connecting pipe 153 is connected to the freezing evaporator 130, and two ends of the freezing evaporator inlet pipe 152 are respectively connected to the first outlet 212 of the first three-way valve and the freezing evaporator 130. When the inlet 211 of the first three-way valve and the first outlet 212 of the first three-way valve are opened, the refrigerant flows out of the first outlet 212 of the first three-way valve, sequentially passes through the freezing evaporator inlet pipe 152 and the freezing evaporator connecting pipe 153, and then flows into the freezing evaporator 130. The high-temperature and high-pressure refrigerant dissipates heat inside the freezing evaporator 130 to realize the defrosting effect on the freezing evaporator 130. Two ends of the freezing evaporator outlet pipe 154 are respectively connected to the freezing evaporator 130 and the refrigerating evaporator 140, and the refrigerant discharged from the freezing evaporator 130 sequentially flows through the first freezing evaporator connecting pipe 154 and then enters the refrigeration evaporator 140. The temperature of the refrigerant decreases after the refrigerant dissipates heat in the freezing evaporator 130, and the refrigerant with a decreased temperature can absorb heat in the refrigerating evaporator 140 to enable the refrigerating evaporator 140 to cool the refrigerating chamber or keep the refrigerating chamber at a low temperature. The second three-way valve 220 comprises the first inlet, the second inlet and the outlet. Two ends of the refrigerating evaporator outlet pipe 155 are respectively connected to the refrigerating evaporator 140 and the first inlet 221 of the second three-way valve, and the refrigerant flows out of the refrigerating evaporator and then flows to the first inlet 221 of the second three-way valve through the refrigerating evaporator outlet pipe 155. Two ends of the compressor inlet pipe 156 are respectively connected to the outlet 223 of the second three-way valve and the compressor 110. When the first inlet 221of the second three-way valve and the outlet of the second three-way valve are opened, the refrigerant passes through the second three-way valve 220 and then flows back into the compressor 110 through the compressor inlet pipe156. Thus, it is achieved that the refrigerant can circulate among the compressor 110, the freezing evaporator 130 and the refrigerating evaporator 140inthe defrosting mode, and the defrosting effect on the freezing evaporator 130 is achieved.

[0082] In the defrosting mode, by opening the inlet 211 of the first three-way valve and the first outlet 212 of the first three-way valve and opening the first inlet 221 and the outlet of the second three-way valve, the refrigerant can be made to circulate among the compressor 110, the freezing evaporator 130 and the refrigerating evaporator 140, and the refrigerant is prevented from flowing into the condenser 120, to achieve the defrosting effect on the freezing evaporator 130.

[0083] In some embodiments, exemplarily, as shown in FIG. 2, the second pipeline assembly 160 comprises: a condenser inlet pipe 161, two ends of the condenser inlet pipe 161being respectively connected to the second outlet 213 of the first three-way valve and the condenser 120; a condenser liquid outlet pipe 162, two ends of the condenser liquid outlet pipe 162being respectively connected to the condenser 120 and an inlet 231 of the third three-way valve; a freezing evaporator liquid inlet pipe 163, two ends of the freezing evaporator liquid inlet pipe 163 being respectively connected to the freezing evaporator 130 and a first outlet 232 of the third three-way valve; wherein, one end of the freezing evaporator connecting pipe 153 is connected to a second inlet 222 of the second three-way valve. In the freezing mode, the inlet 211 of the first three-way valve and the second outlet 213 of the first three-way valve are opened while the first outlet of the first three-way valve is closed, the second inlet 222of the second three-way valve and the outlet 223 of the second three-way valve are opened while the first inlet 221 of the second three-way valve is closed, and the inlet 231 of the third three-way valve and the first outlet 232 of the third three-way valve are opened, to make the refrigerant in the refrigeration system 100 circulate sequentially among the compressor 110, the condenser 120 and the freezing evaporator 130.

[0084] In the embodiments, the structure of the second pipeline assembly 160 is defined. The second pipeline assembly 160 comprises the condenser inlet pipe 161, the condenser liquid outlet pipe 162 and the freezing evaporator liquid inlet pipe 163. The first three-way valve 210 comprises the inlet, the first outlet and the second outlet. Two ends of the condenser inlet pipe 161 are respectively connected to the second outlet 213 of the first three-way valve and the condenser 120, and the condenser 120 can be in communication with the compressor 110 by opening the inlet 211 and the second outlet of the first three-way valve and closing the first outlet 212 of the first three-way valve. When the inlet 211 and the second outlet of the first three-way valve are opened and the first outlet 212 of the first three-way valve is closed, the refrigerant discharged from the compressor 110 flows into the condenser 120 through the compressor exhaust pipe 151, the first three-way valve 210 and the condenser inlet pipe 161. The third three-way valve 230 comprises the inlet, the first outlet and the second outlet. Two ends of the condenser liquid outlet pipe 162 are respectively connected to the condenser 120 and the inlet 231 of the third three-way valve, and the refrigerant flows out of the condenser 120 and then flows to the inlet 231 of the third three-way valve through the condenser liquid outlet pipe 162. Two ends of the freezing evaporator liquid inlet pipe 163 are respectively connected to the freezing evaporator 130 and the first outlet 232 of the third three-way valve. When the first outlet 232 and the inlet of the third three-way valve are opened and a second outlet 233 of the third three-way valve is closed, the refrigerant flows through the freezing evaporator liquid inlet pipe 163 through the third three-way valve 230 and then flows to the freezing evaporator 130. One end of the freezing evaporator connecting pipe 153 is connected to the second inlet 222 of the second three-way valve, and the refrigerant flows out of the freezing evaporator 130 and then flows to the second three-way valve 220 through the freezing evaporator connecting pipe 153. Since two ends of the compressor inlet pipe 156 are connected to the outlet 223 of the second three-way valve and the compressor 110, when the second inlet 222of the second three-way valve and the outlet 223 of the second three-way valve are opened and the first inlet 221 of the second three-way valve is closed, the refrigerant flows into the compressor inlet pipe 156 through the second three-way valve 220 and then flows back into the compressor 110, to realize the circulating of the refrigerant among the compressor 110, the condenser 120 and the freezing evaporator 130.The arrow direction in FIG. 2 is the flowing direction of the refrigerant.

[0085] In the freezing mode, by controlling the inlet 211 of the first three-way valve and the second outlet 213 of the first three-way valve to open and the first outlet of the first three-way valve to close, the second inlet 222 of the second three-way valve and the outlet 223 of the second three-way valve to open and the first inlet 221 of the second three-way valve to close, and the inlet 231 of the third three-way valve and the first outlet 232 of the third three-way valve to open, it is achieved that the compressor 110, the condenser 120 and the refrigerating evaporator 140 are connected end to end, thus enabling the refrigerant to circulate sequentially among the compressor 110, the condenser 120 and the freezing evaporator 130, and realizing the refrigeration function of the freezing evaporator 130 for the freezing chamber.

[0086] In some embodiments, exemplarily, as shown in FIG. 3, the third pipeline assembly 170 comprises a refrigerating evaporator liquid inlet pipe 171, two ends of which being respectively connected to the refrigerating evaporator 140 and the second outlet 233 of the third three-way valve; wherein, in the refrigerating mode, the inlet 211of the first three-way valve and the second outlet 213 of the first three-way valve are opened and the first outlet 212 of the first three-way valve is closed, the first inlet 221of the second three-way valve and the outlet 223 of the second three-way valve are opened and the second inlet 222 of the second three-way valve is closed, the inlet 231of the third three-way valve and the second outlet 233 of the third three-way valve are opened and the first outlet 232 of the third three-way valve is closed, to make the refrigerant in the refrigeration system 100 circulate sequentially among the compressor 110, the condenser 120 and the refrigerating evaporator 140.

[0087] In the embodiments, the structure of the third pipeline assembly 170 is defined. The third pipeline assembly 170 comprises the refrigerating evaporator liquid inlet pipe 171. The third three-way valve 230 comprises the inlet, the first outlet and the second outlet. Two ends of the refrigerating evaporator liquid inlet pipe 171 are respectively connected to the refrigerating evaporator 140 and the second outlet 233 of the third three-way valve. When the inlet 231of the third three-way valve and the second outlet 233 of the third three-way valve are opened and the first outlet 232 of the third three-way valve is closed, the refrigerant in the condenser liquid outlet pipe 162 flows into the refrigerating evaporator 140 through the third three-way valve 230. In addition, since the refrigerating evaporator 140 is connected to the first inlet 221 of the second three-way valve through the refrigerating evaporator outlet pipe 155, when the first inlet 221of the second three-way valve and the outlet 223 of the second three-way valve are opened and the second inlet 222 of the second three-way valve is closed, the refrigerant discharged from the refrigerating evaporator 140 flows back into the compressor 110 through the refrigerating evaporator outlet pipe 155, the second three-way valve 220 and the compressor inlet pipe 156. The arrow direction in FIG. 3 is the flowing direction of the refrigerant.

[0088] In the refrigerating mode, by controlling the inlet 211 of the first three-way valve and the second outlet 213 of the first three-way valve to open and the first outlet 212 of the first three-way valve to close, the first inlet 221 of the second three-way valve and the outlet 223 of the second three-way valve to open and the second inlet 222 of the second three-way valve to close, and the inlet 231 of the third three-way valve and the second outlet 233 of the third three-way valve to open and the first outlet 232 of the third three-way valve to close, the compressor 110, the condenser 120 and the refrigerating evaporator 140 can be connected end to end in sequence, and the refrigerant is made to circulate sequentially among the compressor 110, the condenser 120 and the refrigerating evaporator 140, to realize the refrigeration function of the refrigerating evaporator 140 for the refrigerating chamber.

[0089] In some embodiments, exemplarily, as shown in FIG. 1, FIG. 2 and FIG. 3, the refrigeration system 100 further comprises: a first capillary section 270 disposed on the freezing evaporator outlet pipe 154; a second capillary section 280 disposed on the freezing evaporator liquid inlet pipe 163; and a third capillary section 290 disposed on the refrigerating evaporator liquid inlet pipe 171.

[0090] In the embodiments, the refrigeration system 100 is further defined. The refrigeration system 100 further comprises the first capillary section 270, the second capillary section 280 and the third capillary section 290. Wherein, the first capillary section 270 is disposed on the freezing evaporator outlet pipe 154. In the defrosting mode, the refrigerant discharged from the freezing evaporator 130 flows through the first capillary section 270 disposed on the freezing evaporator outlet pipe 154 and then enters the refrigerating evaporator 140. It can be understood that the first capillary section 270 has the function of reducing the temperature and pressure of the refrigerant. In the defrosting mode, the refrigerant discharged from the compressor 110 is in a high-temperature and high-pressure state. The high-temperature and high-pressure refrigerant dissipates heat and cools down after entering the freezing evaporator 130, thus achieving the defrosting effect on the freezing evaporator 130. The refrigerant after dissipating heat and cooling down becomes a medium-temperature and high-pressure refrigerant. The refrigerant flows through the first capillary section 270, and the first capillary section 270 reduces the temperature and pressure of the refrigerant to make the refrigerant become a refrigerant in a low-temperature and low-pressure state. The refrigerant in the low-temperature and low-pressure state flows into the refrigerating evaporator 140 to absorb heat, to enable the refrigerating evaporator 140 to cool the refrigerating chamber or keep the low-temperature state of the refrigerating chamber, to realize the refrigeration function of the refrigerating evaporator 140.

[0091] Furthermore, the second capillary section 280 is disposed on the freezing evaporator liquid inlet pipe 163. In the freezing mode, after the refrigerant is discharged from the condenser 120, it flows through the second capillary section 280 and enters the freezing evaporator 130. In the process that the refrigerant flows through the second capillary section 280, both the temperature and the pressure decrease to a certain extent to form the refrigerant in a low-temperature and low-pressure state. The refrigerant in the low-temperature and low-pressure state flows into the freezing evaporator 130 to absorb heat, to enable the freezing evaporator 130 to cool the freezing chamber or keep the low-temperature state of the freezing chamber, to realize the refrigeration function of the freezing evaporator 130.

[0092] Furthermore, the third capillary section 290 is disposed on the refrigerating evaporator liquid inlet pipe 171. In the refrigerating mode, after the refrigerant is discharged from the condenser 120, it flows through the third capillary section 290 and enters the refrigerating evaporator 140. In the process that the refrigerant flows through the third capillary section 290, both the temperature and the pressure decrease to a certain extent to form the refrigerant in a low-temperature and low-pressure state. The refrigerant in the low-temperature and low-pressure state flows into the refrigerating evaporator 140 to absorb heat, to enable the refrigerating evaporator 140 to cool the refrigerating chamber or keep the low-temperature state of the refrigerating chamber, to realize the refrigeration function of the refrigerating evaporator 140.

[0093] By disposing the first capillary section 270 on the freezing evaporator outlet pipe 154, disposing the second capillary section 280 on the freezing evaporator liquid inlet pipe 163, and disposing the third capillary section 290 on the refrigerating evaporator liquid inlet pipe 171, the refrigerant can be cooled and depressurized through the first capillary section 270, the second capillary section 280 and the third capillary section 290, to enable the refrigerant to absorb heat in the freezing evaporator 130 or the refrigerating evaporator 140, thus realizing the refrigeration functions of the freezing evaporator 130 and the refrigerating evaporator 140.

[0094] In some embodiments, exemplarily, as shown in FIG. 1, FIG. 2 and FIG. 3, the refrigeration system 100 further comprises: a freezing fan 250 provided adjacent to the freezing evaporator 130; a refrigerating fan 240 provided adjacent to the refrigerating evaporator 140; and a condenser fan 260 provided adjacent to the condenser 120. In the defrosting mode, the freezing fan 250 and the condenser fan 260 stop operating, and the refrigerating fan 240 operates.

[0095] In the embodiments, the refrigeration system 100 is further defined. The refrigeration system 100 further comprises the freezing fan 250, the refrigerating fan 240 and the condenser fan 260. Wherein, the freezing fan 250 is provided adjacent to the freezing evaporator 130. When the freezing fan 250 is in operation, the freezing fan 250 can generate airflow near the freezing evaporator 130, and the airflow passes through the freezing evaporator 130 at a certain speed to form forced convective heat exchange, which can bring the cold energy of the freezing evaporator 130 into the freezing chamber to refrigerate the freezing chamber. Furthermore, the refrigerating fan 240 is provided adjacent to the refrigerating evaporator 140. When the refrigerating fan 240 is in operation, the refrigerating fan 240 can generate airflow near the refrigerating evaporator 140, and the airflow passes through the refrigerating evaporator 140 at a certain speed to form forced convective heat exchange, to bring the cold energy of the refrigerating evaporator 140 into the refrigerating chamber to refrigerate the refrigerating chamber. Furthermore, the condenser fan 260 is provided adjacent to the condenser 120. When the condenser fan 260 is in operation, the airflow generated by the condenser fan 260 can dissipate heat for the condenser 120, to transfer the heat of the condenser 120 to the external environment of the refrigeration apparatus to which the refrigeration system 100 is applied.

[0096] Furthermore, in the defrosting mode, the freezing fan 250 and the condenser fan 260 stop operating, and the refrigerating fan 240 operates to improve the defrosting effect.

[0097] In some embodiments, exemplarily, as shown in FIG. 1, FIG. 2 and FIG. 3, the refrigeration system 100 further comprises a plurality of filters 180 which are respectively provided on the first pipeline assembly 150 and the second pipeline assembly 160.

[0098] In the embodiments, the refrigeration system 100 is further defined. The refrigeration system 100 further comprises the plurality of filters 180, which are respectively disposed on the first pipeline assembly 150 and the second pipeline assembly 160. In some embodiments, the plurality of filters 180 are respectively provided on the condenser liquid outlet pipe 162 and the refrigerating evaporator liquid inlet pipe 171. The filters 180 can filter the refrigerant, prevent impurities in the refrigerant from blocking various components and pipelines in the refrigeration system 100, improve the reliability of the refrigeration system 100, and prolong the service life of the refrigeration system 100.

[0099] In some embodiments, exemplarily, the refrigeration system 100 further comprises a controller, and the controller is electrically connected to the first three-way valve 210, the second three-way valve 220 and the third three-way valve 230. The controller is further electrically connected to the freezing fan 250, the refrigerating fan 240 and the condenser fan 260. The controller is used to control the opening and closing of respective ports of the first three-way valve 210, the second three-way valve 220 and the third three-way valve 230, and control the operation of the freezing fan 250, the refrigerating fan 240 and the condenser fan 260.

[0100] The second aspect of the present application further provides a refrigeration apparatus, which comprises the refrigeration system provided in the first aspect of the present application.

[0101] The refrigeration apparatus provided by the second aspect of the present application comprises the refrigeration system provided by the first aspect of the present application, and therefore has all the beneficial effects of the refrigeration system.

[0102] The refrigeration apparatus may be a refrigerator.

[0103] A third aspect of the present application further provides a control method for a refrigeration system, which is applied to the refrigeration system provided in the first aspect of the present application. FIG. 4 is a first schematic flow chart of a control method for a refrigeration system according to an embodiment of the present application. Wherein, the control method comprises the steps from S102 to S106 in the following: S102: receiving a defrosting instruction; S104: controlling a compressor, a freezing evaporator and a refrigerating evaporator to operate; S106: controlling a first three-way valve to open a first pipeline assembly and block the first pipeline assembly from a second pipeline assembly, to bring the compressor, the freezing evaporator and the refrigerating evaporator into communication in sequence, and block a condenser from the first pipeline assembly.

[0104] The control method for a refrigeration system provided in the present application can be applied to the refrigeration system provided in the first aspect of the present application, the refrigeration system can be used in a refrigeration apparatus, and the refrigeration apparatus may be a refrigerator. In some embodiments, the refrigeration apparatus comprises the refrigerating chamber and the freezing chamber, the refrigerating chamber is configured to refrigerate food ingredients, the freezing chamber is configured to freeze the food ingredients, and the temperature of the refrigerating chamber is higher than the temperature of the freezing chamber. The refrigeration system is configured to adjust the temperatures of the refrigerating chamber and the freezing chamber, to keep the refrigerating chamber and the freezing chamber within a preset low temperature range. The control method for a refrigeration system is defined below.

[0105] Firstly, the defrosting instruction is received, and then the compressor, the freezing evaporator and the refrigerating evaporator in the refrigeration system are controlled to operate. The refrigeration system comprises the first pipeline assembly configured to connect the compressor, the freezing evaporator and the refrigerating evaporator, and the technical effect of defrosting the freezing evaporator can be achieved by circulating the refrigerant among the compressor, the freezing evaporator and the refrigerating evaporator. Since the refrigeration system is provided with a plurality of pipeline assemblies, in order to realize different connection relationships among the compressor, the freezing evaporator, the refrigerating evaporator and the condenser, the present application further disposes the first three-way valve, the second three-way valve and the third three-way valve in the refrigeration system, and different connection relationships among the compressor, the freezing evaporator, the refrigerating evaporator and the condenser can be realized by controlling the opening and closing of respective ports of the first three-way valve, the second three-way valve and the third three-way valve.

[0106] In some embodiments, the first three-way valve is connected to the first pipeline assembly and the second pipeline assembly, the second three-way valve is disposed on the first pipeline assembly, and the third three-way valve is connected to the second pipeline assembly and the third pipeline assembly. After the defrosting instruction is received and the compressor, the freezing evaporator and the refrigerating evaporator are controlled to operate, the first three-way valve is controlled to open the first pipeline assembly and block the first pipeline assembly from the second pipeline assembly, to bring the compressor, the freezing evaporator and the refrigerating evaporator into communication with one another in sequence, and block the condenser from the first pipeline assembly. Thus, this method enables the refrigerant to circulate sequentially among the compressor, the freezing evaporator and the refrigerating evaporator, to achieve the defrosting effect on the freezing evaporator.

[0107] By adopting the above control method, through controlling the opening and closing states of respective ports of the first three-way valve, the second three-way valve and the third three-way valve, the connection among the compressor, the freezing evaporator and the refrigerating evaporator can be realized, and the connection of the condenser with the compressor, the freezing evaporator and the refrigerating evaporator is blocked, and the refrigerant only flows among the compressor, the freezing evaporator and the refrigerating evaporator and is prevented from flowing to the condenser. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor can dissipate heat after flowing into the freezing evaporator, thus realizing defrosting of the freezing evaporator. Adopting the above method for defrosting the freezing evaporator can improve the defrosting efficiency, reduce energy consumption, lower the temperature difference of the freezing chamber, and prolong a food preservation period; in addition, cold energy can be continuously supplied to the refrigerating chamber during defrosting, which lowers or keeps the temperature of the refrigerating chamber at the same time and avoids temperature rise of the refrigerating chamber during defrosting; meanwhile, the refrigerant does not flow through the condenser during defrosting, and the condenser of most refrigerators is attached to both sides of side plates of the refrigerator, and thus this can avoid water condensation caused by an excessively low temperature of the side plates due to the low-temperature refrigerant in the condenser, then avoid customer complaints, and improve product quality and reliability.

[0108] In an embodiment of the present application, the first pipeline assembly comprises the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator outlet pipe, the refrigerating evaporator outlet pipe and the compressor inlet pipe. FIG. 5 is a second schematic flow chart of a control method for a refrigeration system according to an embodiment of the present application. Wherein, the control method comprises the steps from S202 to S206 in the following: S202: receiving the defrosting instruction; S204: controlling the compressor, the freezing evaporator and the refrigerating evaporator to operate; S206: controlling an inlet of the first three-way valve and a first outlet of the first three-way valve to open, and controlling a first inlet of the second three-way valve and the outlet of the second three-way valve to open, to bring the compressor, the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator, the freezing evaporator outlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence.

[0109] In the embodiments, the control method for a refrigeration system is further defined. The first pipeline assembly comprises the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator outlet pipe, the refrigerating evaporator outlet pipe and the compressor inlet pipe. Wherein, the compressor, the compressor exhaust pipe, the first three-way valve, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator, the freezing evaporator outlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe, the second three-way valve and the compressor inlet pipe are connected end to end in sequence. By controlling the opening and closing of respective ports of the first three-way valve and the second three-way valve, the compressor, the freezing evaporator and the refrigerating evaporator can be connected end to end through the first pipeline assembly, and the refrigerant is made to circulate among the compressor, the freezing evaporator and the refrigerating evaporator to achieve the defrosting effect on the freezing compressor. The step of controlling the first three-way valve to open the first pipeline assembly and block the first pipeline assembly from the second pipeline assembly is defined hereinafter.

[0110] The step of controlling the first three-way valve to open the first pipeline assembly and block the first pipeline assembly from the second pipeline assembly comprises: controlling the inlet of the first three-way valve and the first outlet of the first three-way valve to open, and controlling the first inlet of the second three-way valve and the outlet of the second three-way valve to open, to bring the compressor, the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator, the freezing evaporator outlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence.

[0111] In the defrosting mode, by controlling the inlet of the first three-way valve and the first outlet of the first three-way valve to open and controlling the first inlet of the second three-way valve and the outlet of the second three-way valve to open, the refrigerant can be made to circulate among the compressor, the freezing evaporator and the refrigerating evaporator, which prevents the refrigerant from flowing into the condenser, to achieve the defrosting effect on the freezing evaporator.

[0112] According to an embodiment of the present application, the refrigeration system further comprises the freezing fan, the refrigerating fan and the condenser fan, the freezing fan is disposed adjacent to the freezing evaporator, the refrigerating fan is disposed adjacent to the refrigerating evaporator, and the condenser fan is disposed adjacent to the condenser. As shown in FIG. 6, FIG. 6 is a third schematic flow chart of a control method for a refrigeration system according to an embodiment of the present application. Wherein, the control method comprises the steps from S302 to S308 in the following: S302: receiving the defrosting instruction; S304: controlling the compressor, the freezing evaporator and the refrigerating evaporator to operate; S306: controlling the inlet of the first three-way valve and the first outlet of the first three-way valve to open, and controlling the first inlet of the second three-way valve and the outlet of the second three-way valve to open, to bring the compressor, the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator, the freezing evaporator outlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence; S308: controlling the freezing fan and the condenser fan to stop operating, and controlling the refrigerating fan to operate.

[0113] In the embodiments, the control method for a refrigeration system is further defined. The refrigeration system further comprises the freezing fan, the refrigerating fan and the condenser fan. Wherein, the freezing fan is provided adjacent to the freezing evaporator. When the freezing fan is in operation, the freezing fan can generate airflow near the freezing evaporator, and the airflow passes through the freezing evaporator at a certain speed to form forced convective heat exchange, which can bring the cold energy of the freezing evaporator into the freezing chamber to refrigerate the freezing chamber. Furthermore, the refrigerating fan is provided adjacent to the refrigerating evaporator. When the refrigerating fan is in operation, the refrigerating fan can generate airflow near the refrigerating evaporator, and the airflow passes through the refrigerating evaporator at a certain speed to form forced convective heat exchange, to bring the cold energy of the refrigerating evaporator into the refrigerating chamber to refrigerate the refrigerating chamber. Furthermore, the condenser fan is provided adjacent to the condenser. When the condenser fan is in operation, the airflow generated by the condenser fan can dissipate heat for the condenser, to transfer the heat of the condenser to the external environment of the refrigeration apparatus to which the refrigeration system is applied.

[0114] After the defrosting instruction is received and the compressor, the freezing evaporator and the refrigerating evaporator are controlled to operate, the freezing fan and the condenser fan are controlled to stop operating while the refrigerating fan is controlled to operate, and thus the defrosting effect on the freezing evaporator can be improved.

[0115] According to an embodiment of the present application, the second pipeline assembly comprises the condenser inlet pipe, the condenser liquid outlet pipe and the freezing evaporator liquid inlet pipe. FIG. 7 is a fourth schematic flow chart of the control method for a refrigeration system according to an embodiment of the present application. The control method further comprises the steps from S402 to S406 in the following: S402: receiving the freezing instruction; S404: controlling the compressor, the freezing evaporator and the condenser to operate; S406: controlling the inlet of the first three-way valve and the second outlet of the first three-way valve to open, controlling the first outlet of the first three-way valve to close, controlling the second inlet of the second three-way valve and the outlet of the second three-way valve to open, controlling the first inlet of the second three-way valve to close, and controlling the inlet of the third three-way valve and the first outlet of the third three-way valve to open, to bring the compressor, the compressor exhaust pipe, the condenser inlet pipe, the condenser, the condenser liquid outlet pipe, the freezing evaporator liquid inlet pipe, the freezing evaporator, the freezing evaporator connecting pipe and the compressor inlet pipe into communication with one another in sequence.

[0116] In the embodiments, the control method for a refrigeration system is further defined. The refrigeration apparatus to which the refrigeration system is applied further has the freezing mode. To enter the freezing mode, it is necessary to control the opening and closing of respective ports of the first three-way valve, the second three-way valve and the third three-way valve, to bring the compressor, the condenser and the freezing evaporator into communication with one another. The second pipeline assembly comprises the condenser inlet pipe, the condenser liquid outlet pipe and the freezing evaporator liquid inlet pipe. After the freezing instruction is received and the compressor, the freezing evaporator and the condenser are controlled to operate, the inlet of the first three-way valve and the second outlet of the first three-way valve are controlled to open, the first outlet of the first three-way valve is controlled to close, the second inlet of the second three-way valve and the outlet of the second three-way valve are controlled to open, the first inlet of the second three-way valve is controlled to close, and the inlet of the third three-way valve and the first outlet of the third three-way valve are controlled to open, which can enable the compressor, the condenser and the freezing evaporator to be in communication with one another in sequence, and block the connection relationship of the refrigerating evaporator with the condenser, the freezing evaporator and the compressor. Thus, this method enables the refrigerant to circulate sequentially among the compressor, the condenser and the freezing evaporator, to achieve the effect of cooling the freezing chamber or keeping the low temperature of the freezing chamber by the freezing evaporator.

[0117] According to an embodiment of the present application, the third pipeline assembly comprises the refrigerating evaporator liquid inlet pipe. FIG. 8 is a fifth schematic flow chart of the control method for a refrigeration system according to an embodiment of the present application. Wherein, the control method further comprises the steps from S502 to S506 in the following: S502: receiving the refrigerating instruction; S504: controlling the compressor, the refrigerating evaporator and the condenser to operate; S506: controlling the inlet of the first three-way valve and the second outlet of the first three-way valve to open, controlling the first outlet of the first three-way valve to close, controlling the first inlet of the second three-way valve and the outlet of the second three-way valve to open, controlling the second inlet of the second three-way valve to close, controlling the inlet of the third three-way valve and the second outlet of the third three-way valve to open, and controlling the first outlet of the third three-way valve to close, to bring the compressor, the compressor exhaust pipe, the condenser inlet pipe, the condenser, the condenser liquid outlet pipe, the refrigerating evaporator liquid inlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence.

[0118] In the embodiments, the control method for a refrigeration system is further defined. The refrigeration apparatus to which the refrigeration system is applied further has the refrigerating mode. To enter the refrigerating mode, it is necessary to control the opening and closing of respective ports of the first three-way valve, the second three-way valve and the third three-way valve to bring the compressor, the condenser and the refrigerating evaporator into communication with one another. The third pipeline assembly comprises the refrigerating evaporator liquid inlet pipe. After the refrigerating instruction is received and the compressor, the refrigerating evaporator and the condenser are controlled to operate, the inlet of the first three-way valve and the second outlet of the first three-way valve are controlled to open, the first outlet of the first three-way valve is controlled to close, the first inlet of the second three-way valve and the outlet of the second three-way valve are controlled to open, the second inlet of the second three-way valve is controlled to close, the inlet of the third three-way valve and the second outlet of the third three-way valve are controlled to open, and the first outlet of the third three-way valve is controlled to close, which can enable the compressor, the condenser and the refrigerating evaporator to be in communication with one another in sequence, and block the connection relationship between the freezing evaporator and the condenser, the refrigerating evaporator and the compressor. Thus, this method enables the refrigerant to circulate sequentially among the compressor, the condenser and the freezing evaporator, to achieve the effect of cooling the refrigerating chamber or keeping the low temperature of the refrigerating chamber by the refrigerating evaporator.

[0119] As shown in FIG. 9, the fourth aspect of the present application further provides a control device of a refrigeration system. The refrigeration system comprises a compressor, a freezing evaporator, a refrigerating evaporator, a first pipeline assembly, a second pipeline assembly and a first three-way valve. The control device of a refrigeration system comprises: a control module for controlling the compressor, the freezing evaporator and the refrigerating evaporator to operate; and an instruction receiving module for receiving a defrosting instruction; the control module is further configured to control the first three-way valve to open the first pipeline assembly and block the first pipeline assembly from the second pipeline assembly, to enable the compressor, the freezing evaporator and the refrigerating evaporator to be in communication with one another in sequence, and block the condenser from the first pipeline assembly.

[0120] The control device 300 of a refrigeration system provided in the present application can be applied to a refrigeration apparatus, and the refrigeration apparatus may be a refrigerator. In some embodiments, the refrigeration apparatus comprises a refrigerating chamber and a freezing chamber, the refrigerating chamber is configured to refrigerate food ingredients, the freezing chamber is configured to freeze food ingredients, and the temperature of the refrigerating chamber is higher than the temperature of the freezing chamber. The refrigeration system is configured to adjust the temperatures of the refrigerating chamber and the freezing chamber, to keep the refrigerating chamber and the freezing chamber within a preset low temperature range. The control device 300 of a refrigeration system is defined below.

[0121] The refrigeration system comprises the compressor, the freezing evaporator, the refrigerating evaporator, the first pipeline assembly, the second pipeline assembly and the first three-way valve. The control device 300 of a refrigeration system comprises a control module 320 and an instruction receiving module 310. Wherein, the instruction receiving module 310 is configured to receive a defrosting instruction, and the control module 320 is configured to control the compressor, the freezing evaporator and the refrigerating evaporator to operate. The refrigeration system comprises the first pipeline assembly configured to connect the compressor, the freezing evaporator and the refrigerating evaporator, and the technical effect of defrosting the freezing evaporator can be achieved by circulating the refrigerant among the compressor, the freezing evaporator and the refrigerating evaporator. Since the refrigeration system is provided with a plurality of pipeline assemblies, in order to realize different connection relationships among the compressor, the freezing evaporator, the refrigerating evaporator and the condenser, the present application further disposes the first three-way valve, the second three-way valve and the third three-way valve in the refrigeration system, and different connection relationships among the compressor, the freezing evaporator, the refrigerating evaporator and the condenser can be realized by controlling the opening and closing of respective ports of the first three-way valve, the second three-way valve and the third three-way valve. The control module 320 is further configured to control the opening and closing of respective ports of the first three-way valve, the second three-way valve and the third three-way valve.

[0122] The control module 320 is further configured to control the first three-way valve to open the first pipeline assembly and block the first pipeline assembly from the second pipeline assembly, to enable the compressor, the freezing evaporator and the refrigerating evaporator to be in communication with one another in sequence, and block the condenser from the first pipeline assembly. In some embodiments, the first three-way valve is connected to the first pipeline assembly and the second pipeline assembly, the second three-way valve is disposed on the first pipeline assembly, and the third three-way valve is connected to the second pipeline assembly and the third pipeline assembly. After the defrosting instruction is received and the compressor, the freezing evaporator and the refrigerating evaporator are controlled to operate, the first three-way valve is controlled to open the first pipeline assembly and block the first pipeline assembly from the second pipeline assembly, to bring the compressor, the freezing evaporator and the refrigerating evaporator into communication with one another in sequence, and block the condenser from the first pipeline assembly. Thus, this method enables the refrigerant to circulate sequentially among the compressor, the freezing evaporator and the refrigerating evaporator, to achieve the defrosting effect on the freezing evaporator.

[0123] By adopting the above control device, by controlling the opening and closing states of respective ports of the first three-way valve, the second three-way valve and the third three-way valve, the connection among the compressor, the freezing evaporator and the refrigerating evaporator can be realized, and the connection of the condenser with the compressor, the freezing evaporator and the refrigerating evaporator is blocked, and the refrigerant only flows among the compressor, the freezing evaporator and the refrigerating evaporator and is prevented from flowing to the condenser. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor can dissipate heat after flowing into the freezing evaporator, thus realizing defrosting of the freezing evaporator. Adopting the above method for defrosting the freezing evaporator can improve the defrosting efficiency, reduce energy consumption, lower the temperature difference of the freezing chamber, and prolong the food preservation period; in addition, cold energy can be continuously supplied to the refrigerating chamber during defrosting, which lowers or keeps the temperature of the refrigerating chamber at the same time and avoids temperature rise of the refrigerating chamber during defrosting; meanwhile, the refrigerant does not flow through the condenser during defrosting, and the condenser of most refrigerators is attached to both sides of side plates of the refrigerator, and thus this can avoid water condensation caused by an excessively low temperature of the side plates due to the low-temperature refrigerant in the condenser, then avoid customer complaints, and improve product quality and reliability.

[0124] In some embodiments, exemplarily, the first pipeline assembly comprises the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator outlet pipe, the refrigerating evaporator outlet pipe and the compressor inlet pipe. The control module 320 is configured to control the inlet of the first three-way valve and the first outlet of the first three-way valve to open, and controlling the first inlet of the second three-way valve and an outlet of the second three-way valve to open, to bring the compressor, the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator, the freezing evaporator outlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence.

[0125] In the embodiments, the control device 300 of a refrigeration system is further defined. The first pipeline assembly comprises the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator outlet pipe, the refrigerating evaporator outlet pipe and the compressor inlet pipe. Wherein, the compressor, the compressor exhaust pipe, the first three-way valve, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator, the freezing evaporator outlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe, the second three-way valve and the compressor inlet pipe are connected end to end in sequence. By controlling the opening and closing of respective ports of the first three-way valve and the second three-way valve, the compressor, the freezing evaporator and the refrigerating evaporator can be connected end to end through the first pipeline assembly, thus making the refrigerant circulate among the compressor, the freezing evaporator and the refrigerating evaporator, thus achieving the defrosting effect on the freezing compressor. The control module 320 is configured to control the inlet of the first three-way valve and the first outlet of the first three-way valve to open and controlling the first inlet of the second three-way valve and the outlet of the second three-way valve to open, which can bring the compressor, the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator, the freezing evaporator outlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence.

[0126] In the defrosting mode, by controlling the inlet of the first three-way valve and the first outlet of the first three-way valve to open and controlling the first inlet of the second three-way valve and the outlet of the second three-way valve to open, the refrigerant can be made to circulate among the compressor, the freezing evaporator and the refrigerating evaporator, which prevents the refrigerant from flowing into the condenser, to achieve the defrosting effect on the freezing evaporator.

[0127] In some embodiments, exemplarily, the refrigeration system further comprises the freezing fan, the refrigerating fan and the condenser fan, the freezing fan is disposed adjacent to the freezing evaporator, the refrigerating fan is disposed adjacent to the refrigerating evaporator, and the condenser fan is disposed adjacent to the condenser. The control module 320 is further configured to control the freezing fan and the condenser fan to stop operating, and controlling the refrigerating fan to operate.

[0128] In the embodiments, the control device 300 of a refrigeration system is further defined. The refrigeration system further comprises the freezing fan, the refrigerating fan and the condenser fan. Wherein, the freezing fan is provided adjacent to the freezing evaporator. When the freezing fan is in operation, the freezing fan can generate airflow near the freezing evaporator, and the airflow passes through the freezing evaporator at a certain speed to form forced convective heat exchange, which can bring the cold energy of the freezing evaporator into the freezing chamber to refrigerate the freezing chamber. Furthermore, the refrigerating fan is provided adjacent to the refrigerating evaporator. When the refrigerating fan is in operation, the refrigerating fan can generate airflow near the refrigerating evaporator, and the airflow passes through the refrigerating evaporator at a certain speed to form forced convective heat exchange, to bring the cold energy of the refrigerating evaporator into the refrigerating chamber to refrigerate the refrigerating chamber. Furthermore, the condenser fan is provided adjacent to the condenser. When the condenser fan is in operation, the airflow generated by the condenser fan can dissipate heat for the condenser, to transfer the heat of the condenser to the external environment of the refrigeration apparatus to which the refrigeration system is applied.

[0129] Furthermore, the control module 320 is further configured to control the freezing fan and the condenser fan to stop operating and control the refrigerating fan to operate. After the defrosting instruction is received and the compressor, the freezing evaporator and the refrigerating evaporator are controlled to operate, the defrosting effect on the freezing evaporator can be improved by controlling the freezing fan and the condenser fan to stop operating while controlling the refrigerating fan to operate.

[0130] In some embodiments, exemplarily, the second pipeline assembly comprises the condenser inlet pipe, the condenser liquid outlet pipe and the freezing evaporator liquid inlet pipe. The instruction receiving module 310 is further configured to receive a freezing instruction; the control module 320 is further configured to control the compressor, the freezing evaporator and the condenser to operate, control the inlet of the first three-way valve and the second outlet of the first three-way valve to open, control the first outlet of the first three-way valve to close, control the second inlet of the second three-way valve and the outlet of the second three-way valve to open, control the first inlet of the second three-way valve to close, and control the inlet of the third three-way valve and the first outlet of the third three-way valve to open, to bring the compressor, the compressor exhaust pipe, the condenser inlet pipe, the condenser, the condenser liquid outlet pipe, the freezing evaporator liquid inlet pipe, the freezing evaporator, the freezing evaporator connecting pipe and the compressor inlet pipe into communication with one another in sequence.

[0131] In the embodiments, the control device 300 of a refrigeration system is further defined. The refrigeration apparatus to which the refrigeration system is applied further has the freezing mode. To enter the freezing mode, it is necessary to control the opening and closing of respective ports of the first three-way valve, the second three-way valve and the third three-way valve, to bring the compressor, the condenser and the freezing evaporator into communication with one another. The second pipeline assembly comprises the condenser inlet pipe, the condenser liquid outlet pipe and the freezing evaporator liquid inlet pipe. The instruction receiving module 310 is further configured to receive the freezing instruction; the control module 320 is further configured to control the compressor, the freezing evaporator and the condenser to operate; control the inlet of the first three-way valve and the second outlet of the first three-way valve to open, control the first outlet of the first three-way valve to close, control the second inlet of the second three-way valve and the outlet of the second three-way valve to open, control the first inlet of the second three-way valve to close, and control the inlet of the third three-way valve and the first outlet of the third three-way valve to open, to bring the compressor, the compressor exhaust pipe, the condenser inlet pipe, the condenser, the condenser liquid outlet pipe, the freezing evaporator liquid inlet pipe, the freezing evaporator, the freezing evaporator connecting pipe and the compressor inlet pipe into communication with one another in sequence. Thus, the refrigerant can be made to circulate sequentially among the compressor, the condenser and the freezing evaporator, to achieve the effect of cooling the freezing chamber or keeping the low temperature of the freezing chamber by the freezing evaporator.

[0132] In some embodiments, exemplarily, the third pipeline assembly comprises the refrigerating evaporator liquid inlet pipe. The instruction receiving module 310 is further configured to receive a refrigerating instruction; the control module 320 is further configured to control the compressor, the refrigerating evaporator and the condenser to operate, control the inlet of the first three-way valve and the second outlet of the first three-way valve to open, control the first outlet of the first three-way valve to close, control the first inlet of the second three-way valve and the outlet of the second three-way valve to open, control the second inlet of the second three-way valve to close, control the inlet of the third three-way valve and the second outlet of the third three-way valve to open, and control the first outlet of the third three-way valve to close, to bring the compressor, the compressor exhaust pipe, the condenser inlet pipe, the condenser, the condenser liquid outlet pipe, the refrigerating evaporator liquid inlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence.

[0133] In the embodiments, the control device 300 of a refrigeration system is further defined. The refrigeration apparatus to which the refrigeration system is applied further has the refrigerating mode. To enter the refrigerating mode, it is necessary to control the opening and closing of respective ports of the first three-way valve, the second three-way valve and the third three-way valve to bring the compressor, the condenser and the refrigerating evaporator into communication with one another. The third pipeline assembly comprises the refrigerating evaporator liquid inlet pipe. The instruction receiving module 310 is further configured to receive the refrigerating instruction; the control module 320 is further configured to control the compressor, the refrigerating evaporator and the condenser to operate, control the inlet of the first three-way valve and the second outlet of the first three-way valve to open, control the first outlet of the first three-way valve to close, control the first inlet of the second three-way valve and the outlet of the second three-way valve to open, control the second inlet of the second three-way valve to close, control the inlet of the third three-way valve and the second outlet of the third three-way valve to open, and control the first outlet of the third three-way valve to close, to bring the compressor, the compressor exhaust pipe, the condenser inlet pipe, the condenser, the condenser liquid outlet pipe, the refrigerating evaporator liquid inlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence. Thus, the refrigerant can be made to circulate sequentially among the compressor, the condenser and the freezing evaporator, to achieve the effect of cooling the refrigerating chamber or keeping the low temperature of the refrigerating chamber by the refrigerating evaporator.

[0134] The fifth aspect of the present application further provides a refrigeration apparatus, comprising the control device of a refrigeration system provided in the fourth aspect of the present application.

[0135] The refrigeration apparatus provided in the fifth aspect of the present application comprises the control device of a refrigeration system provided in the fourth aspect of the present application, and thus has all the beneficial effects of the control device of a refrigeration system.

[0136] The sixth aspect of the present application further provides a computer-readable storage medium, and programs or instructions are stored in the computer-readable storage medium; when the programs or instructions are executed by a processor, the steps of the control method for a refrigeration system provided in the third aspect of the present application are achieved, and therefore, the computer-readable storage medium has all the beneficial technical effects of the control method for a refrigeration system in any possible embodiment of the above third aspect.

[0137] In the present application, the term of "a plurality of" indicates two or more than two, unless otherwise explicitly defined. Terms such as "mount", "connect with", "connect to" and "fix" shall be understood in a broad sense. For example, "connect to" may refer to a fixed connection, a detachable connection, or an integral connection; "connect with" may refer to a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood based on specific circumstances.

[0138] In the description of the present application, the description of the terms of "an embodiment", "some embodiments", "specific embodiment" and the like is intended to mean that the specific features, structures, materials or characteristics described in combination with the embodiments or examples are comprised in at least one embodiment or example of the present application. In the description, the illustrative expression of the above terms may not indicate the same embodiment or example. In addition, the described specific features, structures, materials or characteristics may be combined with each other in an appropriate method in one or more of any embodiments or examples.

[0139] The above-mentioned are merely some embodiments of the present application and are not intended to limit the present application, and for one skilled in the art, various modifications and changes may be made to the present application. Any modifications, equivalent substitutions, improvements should be covered within the scope of protection of the present application.

Claims

1. A refrigeration system for a refrigeration apparatus, wherein the refrigeration apparatus comprises a refrigerating chamber and a freezing chamber, and the refrigeration system comprises: a compressor; a condenser; a freezing evaporator configured to cool the freezing chamber; a refrigerating evaporator configured to cool the refrigerating chamber; a first pipeline assembly configured to communicate the compressor, the freezing evaporator and the refrigerating evaporator; a second pipeline assembly configured to connect the condenser to the compressor and the freezing evaporator; a third pipeline assembly configured to connect the refrigerating evaporator to the second pipeline assembly; a first three-way valve connected to the first pipeline assembly and the second pipeline assembly; a second three-way valve provided on the first pipeline assembly; and a third three-way valve connected to the second pipeline assembly and the third pipeline assembly, wherein in a defrosting mode, the first three-way valve and the second three-way valve open the first pipeline assembly, the first three-way valve blocks the second pipeline assembly from the first pipeline assembly, and the third three-way valve blocks the third pipeline assembly from the second pipeline assembly, such that a refrigerant in the refrigeration system circulates sequentially among the compressor, the freezing evaporator and the refrigerating evaporator.

2. The refrigeration system according to claim 1, wherein the first pipeline assembly comprises: a compressor exhaust pipe, two ends of the compressor exhaust pipe being respectively connected to the compressor and an inlet of the first three-way valve; a freezing evaporator inlet pipe; a freezing evaporator connecting pipe connected to the freezing evaporator, two ends of the freezing evaporator inlet pipe being respectively connected to a first outlet of the first three-way valve and the freezing evaporator connecting pipe; a freezing evaporator outlet pipe, two ends of the freezing evaporator outlet pipe being respectively connected to the freezing evaporator and the refrigerating evaporator; a refrigerating evaporator outlet pipe, two ends of the refrigerating evaporator outlet pipe being respectively connected to the refrigerating evaporator and a first inlet of the second three-way valve; and a compressor inlet pipe, two ends of the compressor inlet pipe being respectively connected to an outlet of the second three-way valve and the compressor, wherein in the defrosting mode, an inlet of the first three-way valve and a first outlet of the first three-way valve are opened, and the first inlet of the second three-way valve and the outlet of the second three-way valve are opened.

3. The refrigeration system according to claim 2, wherein the second pipeline assembly comprises: a condenser inlet pipe, two ends of the condenser inlet pipe being respectively connected to a second outlet of the first three-way valve and the condenser; a condenser liquid outlet pipe, two ends of the condenser liquid outlet pipe being respectively connected to the condenser and an inlet of the third three-way valve; and a freezing evaporator liquid inlet pipe, two ends of the freezing evaporator liquid inlet pipe being respectively connected to the freezing evaporator and a first outlet of the third three-way valve, wherein one end of the freezing evaporator connecting pipe is connected to a second inlet of the second three-way valve, and in a freezing mode, the inlet of the first three-way valve and the second outlet of the first three-way valve are opened while the first outlet of the first three-way valve is closed, the second inlet of the second three-way valve and the outlet of the second three-way valve are opened while the first inlet of the second three-way valve is closed, and the inlet of the third three-way valve and the first outlet of the third three-way valve are opened, to cause the refrigerant in the refrigeration system to circulate sequentially among the compressor, the condenser and the freezing evaporator.

4. The refrigeration system according to claim 3, wherein, the third pipeline assembly comprises: a refrigerating evaporator liquid inlet pipe, two ends of which being respectively connected to the refrigerating evaporator and a second outlet of the third three-way valve, wherein in a refrigerating mode, the inlet of the first three-way valve and the second outlet of the first three-way valve are opened and the first outlet of the first three-way valve is closed, the first inlet of the second three-way valve and the outlet of the second three-way valve are opened and the second inlet of the second three-way valve is closed, the inlet of the third three-way valve and the second outlet of the third three-way valve are opened and the first outlet of the third three-way valve is closed, to cause the refrigerant in the refrigeration system to circulate sequentially among the compressor, the condenser and the refrigerating evaporator.

5. The refrigeration system according to claim 4, further comprising: a first capillary section disposed on the freezing evaporator outlet pipe; a second capillary section disposed on the freezing evaporator liquid inlet pipe; and a third capillary section disposed on the refrigerating evaporator liquid inlet pipe.

6. The refrigeration system according to any one of claims 1 to 5, further comprising: a freezing fan provided adjacent to the freezing evaporator; a refrigerating fan provided adjacent to the refrigerating evaporator; and a condenser fan provided adjacent to the condenser, wherein in the defrosting mode, the freezing fan and the condenser fan stop operating, and the refrigerating fan operates.

7. The refrigeration system according to any one of claims 1 to 5, further comprising: a plurality of filters which are respectively provided on the first pipeline assembly and the second pipeline assembly.

8. A refrigeration apparatus, comprising: the refrigeration system according to any one of claims 1 to 7.

9. A control method for a refrigeration system, applied to the refrigeration system according to any one of claims 1 to 7, comprising: receiving a defrosting instruction; controlling a compressor, a freezing evaporator and a refrigerating evaporator to operate; and controlling a first three-way valve to open a first pipeline assembly and block the first pipeline assembly from a second pipeline assembly, to bring the compressor, the freezing evaporator and the refrigerating evaporator into communication with one another in sequence, and block a condenser from the first pipeline assembly.

10. The control method for a refrigeration system according to claim 9, wherein the first pipeline assembly comprises a compressor exhaust pipe, a freezing evaporator inlet pipe, a freezing evaporator connecting pipe, a freezing evaporator outlet pipe, a refrigerating evaporator outlet pipe and a compressor inlet pipe, and the controlling the first three-way valve to open the first pipeline assembly and block the first pipeline assembly from the second pipeline assembly comprises: controlling an inlet of the first three-way valve and a first outlet of the first three-way valve to open, and controlling a first inlet of the second three-way valve and an outlet of the second three-way valve to open, to bring the compressor, the compressor exhaust pipe, the freezing evaporator inlet pipe, the freezing evaporator connecting pipe, the freezing evaporator, the freezing evaporator outlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence.

11. The control method for a refrigeration system according to claim 9 or 10, wherein: the refrigeration system further comprises a freezing fan, a refrigerating fan and a condenser fan, wherein the freezing fan is disposed adjacent to the freezing evaporator, the refrigerating fan is disposed adjacent to the refrigerating evaporator, and the condenser fan is disposed adjacent to the condenser; and the control method for a refrigeration system further comprises: controlling the freezing fan and the condenser fan to stop operating, and controlling the refrigerating fan to operate.

12. The control method for a refrigeration system according to claim 10, wherein the second pipeline assembly comprises a condenser inlet pipe, a condenser liquid outlet pipe and a freezing evaporator liquid inlet pipe, and the control method further comprises: receiving a freezing instruction; controlling the compressor, the freezing evaporator and the condenser to operate; and controlling the inlet of the first three-way valve and a second outlet of the first three-way valve to open, controlling the first outlet of the first three-way valve to close, controlling a second inlet of the second three-way valve and the outlet of the second three-way valve to open, controlling the first inlet of the second three-way valve to close, and controlling an inlet of the third three-way valve and a first outlet of the third three-way valve to open, to bring the compressor, the compressor exhaust pipe, the condenser inlet pipe, the condenser, the condenser liquid outlet pipe, the freezing evaporator liquid inlet pipe, the freezing evaporator, the freezing evaporator connecting pipe and the compressor inlet pipe into communication with one another in sequence.

13. The control method for a refrigeration system according to claim 12, wherein the third pipeline assembly comprises a refrigerating evaporator liquid inlet pipe, and the control method further comprises: receiving a refrigerating instruction; controlling the compressor, the refrigerating evaporator and the condenser to operate; and controlling the inlet of the first three-way valve and the second outlet of the first three-way valve to open, controlling the first outlet of the first three-way valve to close, controlling the first inlet of the second three-way valve and the outlet of the second three-way valve to open, controlling the second inlet of the second three-way valve to close, controlling the inlet of the third three-way valve and a second outlet of the third three-way valve to open, and controlling the first outlet of the third three-way valve to close, to bring the compressor, the compressor exhaust pipe, the condenser inlet pipe, the condenser, the condenser liquid outlet pipe, the refrigerating evaporator liquid inlet pipe, the refrigerating evaporator, the refrigerating evaporator outlet pipe and the compressor inlet pipe into communication with one another in sequence.

14. A control device of a refrigeration system, wherein the refrigeration system comprises a compressor, a freezing evaporator, a refrigerating evaporator, a first pipeline assembly, a second pipeline assembly and a first three-way valve, and the control device of the refrigeration system comprises: a control module configured to control the compressor, the freezing evaporator and the refrigerating evaporator to operate; and an instruction receiving module configured to receive a defrosting instruction, wherein the control module is further configured to control the first three-way valve to open the first pipeline assembly and block the first pipeline assembly from the second pipeline assembly, to bring the compressor, the freezing evaporator and the refrigerating evaporator into communication with one another in sequence, and block the condenser from the first pipeline assembly.

15. A refrigeration apparatus, comprising: the control device of a refrigeration system according to claim 14.

16. A computer-readable storage medium having programs or instructions stored thereon, wherein the programs or instructions, when executed by a processor, cause steps of the control method for a refrigeration system according to any one of claims 9 to 13 to be performed.

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