Refrigeration system, refrigeration device having same, and control method for refrigeration device

Abstract

Provided are a refrigeration system, a refrigeration device, and a control method for the refrigeration device. The refrigeration system comprises a refrigeration circuit (100). The refrigeration circuit (100) comprises a compressor (1), a condenser (2), a condensate drain tube assembly (3), a drying filter (4), a throttling assembly (5), and an evaporator (6) which are sequentially connected. The condensate drain tube assembly (3) comprises a first condensate drain tube (31) and a second condensate drain tube (32) arranged in parallel. The throttling assembly (5) comprises a first capillary tube (51) and a second capillary tube (52) arranged in parallel. The length of the first condensate drain tube (31) is less than the length of the second condensate drain tube (32), and the inner diameter of the first capillary tube (51) is greater than the inner diameter of the second capillary tube (52).

Description

Refrigeration system, refrigeration device having the same, and control method of refrigeration device

[0001] This application is based on the Chinese patent application with application number CN202311850220.9 and application date December 29, 2023, and claims the priority of the Chinese patent application. The entire content of the above patent application is hereby introduced into this application as a reference. Technical Field

[0002] The present application relates to the technical field of refrigeration equipment, and in particular to a refrigeration system, a refrigeration device having the same, and a control method for the refrigeration device. Background Art

[0003] With the development of science and technology and the continuous improvement of technical levels, refrigeration units such as refrigerators and freezers have become indispensable appliances in people's daily lives. In addition to being used in public places such as shopping malls and supermarkets, refrigeration units have gradually entered thousands of households and become one of the must-have household appliances. Refrigeration units use refrigeration systems to cool refrigeration compartments such as freezer compartments, cold storage compartments, and variable temperature compartments, providing a lower temperature environment for food and beverages, thereby facilitating their freshness and storage.

[0004] However, during daily use of the refrigeration device, the position where the door and the cabinet meet is prone to cold leakage, causing the temperature at the position where the door and the cabinet meet to be 5~10℃ lower than the ambient temperature. Condensation is very likely to occur at this position, but to prevent or eliminate condensation, the temperature at this position needs to be raised to the ambient temperature or even higher, which can easily lead to an increase in the heat load of the refrigeration device and thus an increase in energy consumption.

[0005] The reference to any prior art in the specification is not and should not be taken as an admission or any form of suggestion that the prior art forms part of the common general knowledge in the application area or any other jurisdiction, or that the prior art could reasonably be understood and regarded as relevant by a person skilled in the art. Summary of the Invention

[0006] In order to solve the above technical problems, the purpose of the present application is to provide a refrigeration system, a refrigeration device having the same, and a control method for the refrigeration device.

[0007] To achieve one of the above-mentioned application purposes, one embodiment of the present application provides a refrigeration system, including a refrigeration circuit, the refrigeration circuit including a compressor, a condenser, a dew-removing tube group, a drying filter, a throttling assembly and an evaporator connected in sequence, the dew-removing tube group including a first dew-removing tube and a second dew-removing tube arranged in parallel, the throttling assembly including a first capillary tube and a second capillary tube arranged in parallel, the length of the first dew-removing tube < the length of the second dew-removing tube, and the inner diameter of the first capillary tube > the inner diameter of the second capillary tube.

[0008] In one embodiment of the present application, the refrigeration circuit further comprises a first control valve provided at the inlet of the throttling assembly, the first control valve having a first outlet and a second outlet, the first outlet being in communication with the first capillary tube, and the second outlet being in communication with the second capillary tube;

[0009] The refrigeration system further includes a controller connected to the first control valve, and configured to control only the first outlet to be open, only the second outlet to be open, or both the first outlet and the second outlet to be open.

[0010] In one embodiment of the present application, the refrigeration circuit further includes a second control valve provided at the inlet of the dew removal pipe group, the second control valve having a first interface and a second interface, the first interface being connected to the first dew removal pipe, and the second interface being connected to the second dew removal pipe;

[0011] The refrigeration system further includes a controller connected to the second control valve and controlling the first interface and the second interface to selectively open.

[0012] In one embodiment of the present application, the refrigeration system also includes a defrost connecting pipe connecting the second control valve and the evaporator, and the defrost connecting pipe is arranged at the evaporator. The second control valve also has a third interface, and the third interface is connected to the defrost connecting pipe. The controller controls the first interface, the second interface and the third interface to open one of them.

[0013] To achieve one of the above-mentioned application objectives, an embodiment of the present application further provides a refrigeration device, including a refrigeration compartment and the refrigeration system as described above.

[0014] In one embodiment of the present application, the refrigeration system further includes a controller, a first temperature sensor is provided in the refrigeration room, and the controller is connected to the first temperature sensor to obtain the temperature T in the refrigeration room. R ; The controller is used to:

[0015] T R >First preset temperature T R1 When the refrigerant outlet of the condenser is controlled to be connected to the first dew removal pipe, and the refrigerant outlet of the drying filter is controlled to be connected to the first capillary tube and the second capillary tube at the same time;

[0016] The second preset temperature T R2 <T R ≤T R1When the refrigerant outlet of the condenser is controlled to be connected to the first dew removal pipe, the refrigerant outlet of the drying filter is controlled to be connected only to the first capillary tube.

[0017] In one embodiment of the present application, the refrigeration device further includes a humidity measuring instrument for measuring the ambient humidity M and a humidity measuring instrument for measuring the ambient temperature T. E The controller and the humidity measuring instrument, the second temperature sensor are connected to obtain the ambient humidity M and ambient temperature T E ; The controller is also used for:

[0018] If T R ≤T R2 , then determine whether the ambient humidity M is greater than the preset humidity value M0, and the ambient temperature T E Is it lower than the preset temperature value T E0 ;

[0019] If M≤M0 and T E <T E0 , then controlling the refrigerant outlet of the condenser to communicate with the first dew removal pipe, and controlling the refrigerant outlet of the drying filter to communicate only with the second capillary tube;

[0020] If M≤M0 and T E ≥T E0 , the refrigerant outlet of the condenser is controlled to be connected to the first dew removal pipe, and the refrigerant outlet of the drying filter is controlled to be connected only to the first capillary tube.

[0021] In one embodiment of the present application, the controller is further configured to:

[0022] If T R ≤T R2 , then determine whether the ambient humidity M is greater than the preset humidity value M0, and the ambient temperature T E Is it lower than the preset temperature value T E0 ;

[0023] If M>M0 and T E ≥T E0 , then controlling the refrigerant outlet of the condenser to communicate with the second dew removal pipe, and controlling the refrigerant outlet of the drying filter to communicate only with the first capillary tube;

[0024] If M>M0 and T E <T E0 , the refrigerant outlet of the condenser is controlled to be connected to the second dew removal pipe, and the refrigerant outlet of the drying filter is controlled to be connected only to the second capillary tube.

[0025] In one embodiment of the present application, M0=75%RH, T E0=25℃.

[0026] In one embodiment of the present application, the refrigeration device further includes a third temperature sensor provided on the evaporator for detecting the temperature T of the evaporator. C The controller is connected to the third temperature sensor and is used to obtain the temperature T of the evaporator 6. C ; The controller is also used for:

[0027] The temperature of the evaporator T C <Preset temperature T C0 When the condenser is in the state of being in the state of being heated, the refrigerant outlet of the condenser is controlled to be connected to the defrost connecting pipe provided at the evaporator, and the refrigerant flowing out of the condenser is prevented from passing through the first de-condensation pipe and the second de-condensation pipe;

[0028] to T C ≥T C0 When the refrigerant outlet of the condenser is controlled to be connected to the first dew removing pipe or the second dew removing pipe, the refrigerant flowing out of the condenser is blocked from passing through the defrost connecting pipe.

[0029] To achieve one of the above-mentioned purposes, an embodiment of the present application further provides a method for controlling a refrigeration device, comprising:

[0030] The temperature in the refrigeration room is T R >First preset temperature T R1 When the refrigerant outlet of the condenser is controlled to be connected to the first dew removal pipe, and the refrigerant outlet of the drying filter is controlled to be connected to the first capillary tube and the second capillary tube at the same time;

[0031] The second preset temperature T R2 <T R ≤T R1 When the refrigerant outlet of the condenser is controlled to be connected to the first dew removal pipe, the refrigerant outlet of the drying filter is controlled to be connected only to the first capillary tube.

[0032] In one embodiment of the present application, the control method of the refrigeration device further includes:

[0033] If T R ≤T R2 , then determine whether the ambient humidity M is greater than the preset humidity value M0, and the ambient temperature T E Is it lower than the preset temperature T? E0 ;

[0034] If M≤M0 and T E <T E0, then controlling the refrigerant outlet of the condenser to communicate with the first dew removal pipe, and controlling the refrigerant outlet of the drying filter to communicate only with the second capillary tube;

[0035] If M≤M0 and T E ≥T E0 , the refrigerant outlet of the condenser is controlled to be connected to the first dew removal pipe, and the refrigerant outlet of the drying filter is controlled to be connected only to the first capillary tube.

[0036] In one embodiment of the present application, the control method of the refrigeration device further includes:

[0037] If T R ≤T R2 , then determine whether the ambient humidity M is greater than the preset humidity value M0, and the ambient temperature T E Is it lower than the preset temperature T? E0 ;

[0038] If M>M0 and T E ≥T E0 , then controlling the refrigerant outlet of the condenser to communicate with the second dew removal pipe, and controlling the refrigerant outlet of the drying filter to communicate only with the first capillary tube;

[0039] If M>M0 and T E <T E0 , the refrigerant outlet of the condenser is controlled to be connected to the second dew removal pipe, and the refrigerant outlet of the drying filter is controlled to be connected only to the first capillary tube.

[0040] In one embodiment of the present application, M0=75%RH, T E0 =25℃.

[0041] In one embodiment of the present application, the control method of the refrigeration device further includes:

[0042] The temperature of the evaporator T C <Preset temperature T C0 When the condenser is in the state of being in the state of being heated, the refrigerant outlet of the condenser is controlled to be connected to the defrost connecting pipe provided at the evaporator, and the refrigerant flowing out of the condenser is prevented from passing through the first de-condensation pipe and the second de-condensation pipe;

[0043] to T C ≥T C0 When the refrigerant outlet of the condenser is controlled to be connected to the first dew removing pipe or the second dew removing pipe, the refrigerant flowing out of the condenser is blocked from passing through the defrost connecting pipe.

[0044] Compared with the prior art, the present application has the following beneficial effects: the refrigeration system, refrigeration device and control method thereof of the present application can increase the temperature of the joint between the cabinet and the door body to the ambient temperature or even higher by having the refrigerant flow through the dew-removing pipe, thereby preventing the formation of condensation. Furthermore, by setting two dew-removing pipes of different lengths in parallel and capillaries with different inner diameters in parallel, the refrigerant flow path and the refrigerant flow through the capillary tube can be selectively controlled according to the operating conditions and environmental conditions of the refrigerator, thereby helping to reduce the heat load of the refrigeration device and save energy consumption.

[0045] As used herein, the term "comprise" and variations of the term, such as "comprises," "comprised," "comprising," "including," and "containing" do not exclude other features, components, elements, or steps unless the context clearly requires otherwise. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] FIG1 is a schematic structural diagram of a refrigeration circuit in a specific embodiment of the present application;

[0047] FIG2 is a schematic structural diagram of a refrigeration circuit in another specific embodiment of the present application.

[0048] Reference numerals:

[0049] 100. Refrigeration circuit; 1. Compressor; 2. Condenser; 3. De-condensation pipe assembly; 31. First de-condensation pipe; 32. Second de-condensation pipe; 4. Dry filter; 5. Throttle assembly; 51. First capillary tube; 52. Second capillary tube; 6. Evaporator; 7. First control valve; 8. Second control valve; 9. Defrost connecting pipe. DETAILED DESCRIPTION

[0050] The present application will be described in detail below with reference to the specific embodiments shown in the accompanying drawings.

[0051] In the various figures of the present application, for the sake of convenience, some dimensions of structures or parts are exaggerated relative to other structures or parts, and therefore, are only used to illustrate the basic structure of the subject matter of the present application.

[0052] It should be understood that although the terms first, second, etc. may be used in this document to describe various elements or structures, these described objects should not be limited by these terms. These terms are only used to distinguish these described objects from each other.

[0053] A refrigeration device provided in one embodiment of the present application includes a box body and a door body. The box body has a refrigeration compartment. The door body is used to open or close the refrigeration compartment. The refrigeration compartment can be a refrigerator compartment, a freezer compartment, or a variable temperature compartment.

[0054] The refrigeration device also includes a refrigeration system, which is arranged in the box and supplies cold air to the refrigeration compartment. The refrigeration device can be configured as a freezer, a refrigerator, etc. to meet the needs of different users and different application scenarios.

[0055] Referring to Figures 1 to 2, the refrigeration system includes a refrigeration circuit 100 and a refrigerant located in the refrigeration circuit 100. The refrigeration circuit 100 includes a compressor 1, a condenser 2, a dew-removing pipe group 3, a drying filter 4, a throttling assembly 5 and an evaporator 6 connected in sequence. The dew-removing pipe group 3 includes a first dew-removing pipe 31 and a second dew-removing pipe 32 arranged in parallel. The throttling assembly 5 includes a first capillary tube 51 and a second capillary tube 52 arranged in parallel. The length of the first dew-removing pipe 31 is less than the length of the second dew-removing pipe 32, and the inner diameter of the first capillary tube 51 is greater than the inner diameter of the second capillary tube 52.

[0056] Among them, since the length of the first de-degassing tube 31 is less than the length of the second de-degassing tube 32, the heat generated by the refrigerant flowing through the first de-degassing tube 31 is also less than the heat generated by the refrigerant flowing through the second de-degassing tube 32; since the inner diameter of the first capillary tube 51 is greater than the inner diameter of the second capillary tube 52, the maximum flow rate of the refrigerant available for circulation in the first capillary tube 51 is greater than the maximum flow rate of the refrigerant available for circulation in the second capillary tube 52.

[0057] In one embodiment, the first dew-removing pipe 31 and the second dew-removing pipe 32 are both arranged on the cabinet and located at the junction of the cabinet and the door body. The refrigerant flows through the dew-removing pipe, and the temperature of the junction of the cabinet and the door body can be raised to the ambient temperature or even higher, thereby preventing condensation. Furthermore, by arranging two dew-removing pipes of different lengths in parallel and capillaries with different inner diameters in parallel, the refrigerant flow path and the refrigerant flow through the capillary tube can be selectively controlled according to the operating conditions and environmental conditions of the refrigerator, thereby helping to reduce the heat load of the refrigeration device and save energy consumption.

[0058] In one embodiment, the refrigeration circuit 100 further includes a first control valve 7 provided at the inlet of the throttling assembly 5 , wherein the first control valve 7 has a first outlet and a second outlet, wherein the first outlet is connected to the first capillary tube 51 , and the second outlet is connected to the second capillary tube 52 .

[0059] The refrigeration system further includes a controller connected to the first control valve 7 and controlling whether only the first outlet is open, only the second outlet is open, or both the first outlet and the second outlet are open.

[0060] In this way, the two outlets of the first control valve 7 are connected to the two capillaries respectively, and the conductance of each outlet of the first control valve 7 is controlled by the controller, thereby controlling the flow of the refrigerant in each capillary tube, specifically including:

[0061] (1) When the controller controls only the first outlet to be open, the refrigerant only passes through the first capillary tube 51. At this time, the refrigerant flow rate flowing through the throttling component 5 is small, which can be used in situations where the cooling capacity demand is small;

[0062] (2) When the controller controls only the second outlet to be open, the refrigerant only passes through the second capillary tube 52. At this time, the refrigerant flow rate flowing through the throttling component 5 is relatively large compared to situation (1), which can be applied to situations where the cooling capacity demand is relatively large;

[0063] (3) When the controller controls the first outlet and the second outlet to be open, the refrigerant passes through the first capillary tube 51 and the second capillary tube 52 at the same time. At this time, the refrigerant flow rate flowing through the throttling component 5 is greater than that in situations (1) and (2), which can be used in situations where the cooling capacity demand is particularly large.

[0064] In this way, the refrigerant flow rate flowing through the throttling component 5 can be controlled in real time according to the operating conditions of the refrigeration device, thereby controlling the cooling capacity generated by the refrigeration system to avoid increasing the heat load and energy efficiency of the refrigeration device.

[0065] In one embodiment, the first control valve 7 is a three-way solenoid valve to achieve on / off control of the first outlet and the second outlet.

[0066] In one embodiment, the refrigeration circuit 100 also includes a second control valve 8 provided at the inlet of the de-wrap pipe group 3, the second control valve 8 having a first interface and a second interface, the first interface being connected to the first de-wrap pipe 31, and the second interface being connected to the second de-wrap pipe 32; the controller is connected to the second control valve 8, and controls the first interface and the second interface to be opened selectively.

[0067] In this way, the two interfaces of the second control valve 8 are connected to the two capillaries respectively, and the conduction of each interface of the second control valve 8 is controlled by the controller, thereby controlling the flow of the refrigerant in each de-condensation pipe, specifically including:

[0068] (1) When the controller controls only the first interface to be open, the refrigerant only passes through the first dehumidification pipe 31. At this time, the heat generated by the dehumidification pipe group 3 is relatively small, and it can be used in situations where the dehumidification demand is relatively small;

[0069] (2) When the controller controls only the second interface to be opened, the refrigerant only passes through the second dehumidification pipe 32. At this time, the heat generated by the flow through the dehumidification pipe group 3 is relatively larger than that in situation (1), and can be used in situations where the dehumidification demand is greater.

[0070] Correspondingly, the first control valve 7 may be a three-way solenoid valve to realize the opening and closing control of the first interface and the second interface respectively.

[0071] Referring to Figure 2, in one embodiment, the refrigeration system also includes a defrost connecting pipe 9 connecting the second control valve 8 and the evaporator 6, and the defrost connecting pipe 9 is arranged at the evaporator 6. The second control valve 8 also has a third interface, and the third interface is connected to the defrost connecting pipe 9. The controller controls the first interface, the second interface and the third interface to open one of them.

[0072] That is, when the controller controls only the third port to be opened, the refrigerant only passes through the defrost connecting pipe 9 , thereby defrosting the evaporator 6 .

[0073] In one embodiment, preferably, the first control valve 7 is a four-way solenoid valve to realize the opening and closing control of the first interface, the second interface, and the third interface.

[0074] The evaporator 6 is used to cool the refrigeration compartment. The evaporator 6 can be used to cool the refrigerator compartment, the freezer compartment, or the variable temperature compartment. A first temperature sensor is provided in the refrigeration compartment to detect the temperature in the refrigeration compartment in real time.

[0075] In one embodiment, the controller is connected to a first temperature sensor for obtaining the temperature T in the refrigeration room. R The controller is further configured to:

[0076] T R >First preset temperature T R1 When the refrigerant outlet of the condenser 2 is controlled to be connected to the first dew removing pipe 31, and the refrigerant outlet of the drying filter 4 is controlled to be connected to the first capillary tube 51 and the second capillary tube 52 at the same time;

[0077] The second preset temperature T R2 <T R ≤T R1 When the refrigerant outlet of the condenser 2 is controlled to be connected to the first dew removing pipe 31 , the refrigerant outlet of the drying filter 4 is controlled to be connected only to the first capillary tube 51 .

[0078] When the refrigeration unit is powered on for the first time, or powered on again after a long power outage, the temperature in the refrigeration room is high. R >T R1, the required cooling capacity is large, or when a large amount of hot food is put into the refrigeration compartment, the refrigeration compartment needs to be cooled quickly. In order to ensure sufficient cooling capacity, a large amount of refrigerant flow through the throttling component 5 is required. By controlling the first outlet and the second outlet to be connected, that is, controlling the refrigerant outlet of the drying filter 4 to be connected with the first capillary tube 51 and the second capillary tube 52 at the same time, the cooling capacity of the refrigeration system can be increased and the refrigeration efficiency can be improved; and correspondingly, the refrigerant flow in the dew-removing pipe group 3 is also large, and the heat generated per unit length of the dew-removing pipe is also large. The refrigeration system is running under high load. At this time, controlling the first interface to be opened, that is, controlling the refrigerant outlet of the condenser 2 to be connected with the first dew-removing pipe 31, can reduce the heat dissipated to the outside of the dew-removing pipe group 3, thereby reducing the heat load of the refrigeration device and saving energy efficiency.

[0079] When the temperature in the refrigeration room is T R Down to T R2 <T R ≤T R1 At this time, the cooling capacity demand of the refrigeration compartment is reduced accordingly, thereby reducing the refrigerant flow through the throttling component 5. At this time, only the first outlet is controlled to be connected, that is, the refrigerant outlet of the drying filter 4 is controlled to be connected only to the first capillary tube 51, which can meet the cooling capacity demand of the refrigeration system, thereby saving energy consumption. At the same time, keeping the first interface open, that is, keeping the refrigerant outlet of the condenser 2 connected to the first dew removal pipe 31, not only can meet the dew removal demand, but also avoid the increase in energy consumption of the refrigeration device.

[0080] In one embodiment, the refrigeration device further comprises a humidity measuring instrument for measuring the ambient humidity M and a humidity measuring instrument for measuring the ambient temperature T E The second temperature sensor.

[0081] The controller is connected to the humidity measuring instrument and the second temperature sensor respectively to obtain the ambient humidity M and ambient temperature T E The controller is further configured to:

[0082] If T R ≤T R2 , then determine whether the ambient humidity M is greater than the preset humidity value M0, and the ambient temperature T E Is it lower than the preset temperature T? E0 ;

[0083] If M≤M0 and T E <T E0 , then the refrigerant outlet of the condenser 2 is controlled to be connected to the first dew removal pipe 31, and the refrigerant outlet of the drying filter 4 is controlled to be connected only to the second capillary tube 52;

[0084] If M≤M0 and T E ≥T E0, the refrigerant outlet of the condenser 2 is controlled to be connected to the first dew removal pipe 31 , and the refrigerant outlet of the drying filter 4 is controlled to be connected only to the first capillary tube 51 .

[0085] When the temperature in the refrigeration room is T R Down to T R ≤T R2 The cooling capacity demand of the refrigeration compartment is relatively small. If the ambient humidity is low, that is, M≤M0, the dew point temperature of the refrigerant is relatively low. At this time, the heat required for dehumidification is relatively small. By controlling the first interface to be opened, that is, controlling the refrigerant outlet of the condenser 2 to be connected to the first dehumidification pipe 31, the dehumidification demand can be met, thereby avoiding an increase in the heat load of the refrigeration device.

[0086] In one embodiment, if the ambient temperature T E <T E0 , the temperature difference between the inside and outside of the refrigeration device is small. At this time, the refrigerant outlet of the drying filter 4 is controlled to be connected only to the second capillary tube 52, which can meet the cooling capacity demand in the refrigeration room; if the ambient temperature T E ≥T E0 , the temperature difference between the inside and outside of the refrigeration device is large. At this time, the refrigerant outlet of the drying filter 4 is controlled to be connected only to the first capillary tube 51, so that the refrigerant flow through the throttling component 5 is large, which can meet the cooling capacity demand in the refrigeration room.

[0087] In one embodiment, the controller is further configured to:

[0088] If M>M0 and T E ≥T E0 , then the refrigerant outlet of the condenser 2 is controlled to be connected to the second dew removal pipe 32, and the refrigerant outlet of the drying filter 4 is controlled to be connected only to the first capillary tube 51;

[0089] If M>M0 and T E <T E0 , the refrigerant outlet of the condenser 2 is controlled to be connected to the second dew removal pipe 32 , and the refrigerant outlet of the drying filter 4 is controlled to be connected only to the second capillary tube 52 .

[0090] When the temperature in the refrigeration room is T R Down to T R ≤T R2 , the cooling capacity demand of the refrigeration room is relatively small.

[0091] If the ambient temperature and humidity are high, that is, M>M0 and T E ≥T E0, the heat load of the refrigeration device is large, and the heat required for dehumidification is large. At this time, the second interface is controlled to be open, that is, the refrigerant outlet of the condenser 2 is controlled to be connected to the second dehumidification pipe 32, so as to meet the dehumidification demand. However, due to the large temperature difference between the inside and outside of the refrigeration device, the refrigerant outlet of the drying filter 4 is controlled to be connected only to the first capillary tube 51, so that the refrigerant flow rate flowing through the throttling component 5 is large, so as to meet the cooling capacity demand in the refrigeration room.

[0092] If the ambient humidity is high and the ambient temperature is low, that is, M>M0 and T E <T E0 , the heat required for dehumidification is large, while the heat load of the refrigeration device is small. At this time, the second interface is controlled to be open, that is, the refrigerant outlet of the condenser 2 is controlled to be connected to the second dehumidification pipe 32, so as to meet the dehumidification demand. However, since the temperature difference between the inside and outside of the refrigeration device is small, the refrigerant outlet of the drying filter 4 is controlled to be connected only to the second capillary tube 52, so as to meet the cooling capacity demand in the refrigeration room.

[0093] In one embodiment, M0=75%RH, T E0 =25℃.

[0094] In one embodiment, the refrigeration device further includes a third temperature sensor provided on the evaporator 6 for detecting the temperature T C The controller is connected to the third temperature sensor and is used to obtain the temperature T of the evaporator 6. C .

[0095] In addition, the controller is used to:

[0096] The temperature T of the evaporator 6 C <Preset temperature T C0 When the condenser 2 is in the state of being connected to the defrost connecting pipe 9 provided at the evaporator 6, the refrigerant outlet of the condenser 2 is controlled to be connected to the defrost connecting pipe 9 provided at the evaporator 6, and the refrigerant flowing out of the condenser 2 is blocked from passing through the first de-condensation pipe 31 and the second de-condensation pipe 32;

[0097] to T C ≥T C0 When the refrigerant outlet of the condenser 2 is controlled to be connected to the first dew removing pipe 31 or the second dew removing pipe 32 , the refrigerant flowing out of the condenser 2 is blocked from passing through the defrost connecting pipe 9 .

[0098] In this way, when the evaporator 6 is frosted, the temperature T C , when T C <Preset temperature T C0 When the condenser 2 is refrigerated, the refrigerant is controlled to flow out of the condenser 2 and flow to the defrost connecting pipe 9, thereby defrosting the condenser 2 to prevent the frost on the condenser 2 from affecting the refrigeration effect of the refrigeration device.

[0099] Correspondingly, an embodiment of the present application further provides a method for controlling a refrigeration device, comprising:

[0100] The temperature in the refrigeration room is T R >First preset temperature T R1 When the refrigerant outlet of the condenser 2 is controlled to be connected to the first dew removing pipe 31, and the refrigerant outlet of the drying filter 4 is controlled to be connected to the first capillary tube 51 and the second capillary tube 52 at the same time;

[0101] The second preset temperature T R2 <T R ≤T R1 When the refrigerant outlet of the condenser 2 is controlled to be connected to the first dew removing pipe 31 , the refrigerant outlet of the drying filter 4 is controlled to be connected only to the first capillary tube 51 .

[0102] In one embodiment, the control method further includes:

[0103] If T R ≤T R2 , then determine whether the ambient humidity M is greater than the preset humidity value M0, and whether the ambient temperature TE is lower than the preset temperature value T E0 ;

[0104] If M≤M0 and T E <T E0 , then the refrigerant outlet of the condenser 2 is controlled to be connected to the first dew removal pipe 31, and the refrigerant outlet of the drying filter 4 is controlled to be connected only to the second capillary tube 52;

[0105] If M≤M0 and T E ≥T E0 , the refrigerant outlet of the condenser 2 is controlled to be connected to the first dew removal pipe 31 , and the refrigerant outlet of the drying filter 4 is controlled to be connected only to the first capillary tube 51 .

[0106] In one embodiment, the control method further includes:

[0107] like TR ≤T R2 , then determine whether the ambient humidity M is greater than the preset humidity value M0, and the ambient temperature T E Is it lower than the preset temperature value T E0 ;

[0108] If M>M0 and T E ≥T E0 , then the refrigerant outlet of the condenser 2 is controlled to be connected to the second dew removal pipe 32, and the refrigerant outlet of the drying filter 4 is controlled to be connected only to the first capillary tube 51;

[0109] If M>M0 and T E <T E0 , the refrigerant outlet of the condenser 2 is controlled to be connected to the second dew removal pipe 32 , and the refrigerant outlet of the drying filter 4 is controlled to be connected only to the second capillary tube 52 .

[0110] In one embodiment, the control method further includes:

[0111] The temperature T of the evaporator 6 C <Preset temperature T C0 When the condenser 2 is in the state of being connected to the defrost connecting pipe 9 provided at the evaporator 6, the refrigerant outlet of the condenser 2 is controlled to be connected to the defrost connecting pipe 9 provided at the evaporator 6, and the refrigerant flowing out of the condenser 2 is blocked from passing through the first de-condensation pipe 31 and the second de-condensation pipe 32;

[0112] to T C ≥T C0 When the refrigerant outlet of the condenser 2 is controlled to be connected to the first dew removing pipe 31 or the second dew removing pipe 32 , the refrigerant flowing out of the condenser 2 is blocked from passing through the defrost connecting pipe 9 .

[0113] Compared with the prior art, the refrigeration system, refrigeration device and control method provided by the present application have the following beneficial effects: the temperature of the joint between the cabinet and the door body can be raised to the ambient temperature or even higher by the refrigerant flowing through the dew-removing pipe, thereby preventing the formation of condensation. Furthermore, by setting two dew-removing pipes of different lengths in parallel and capillaries with different inner diameters in parallel, the refrigerant flow path and the refrigerant flow through the capillary tube can be selectively controlled according to the operating conditions and environmental conditions of the refrigerator, which is beneficial to reducing the heat load of the refrigeration device and saving energy consumption.

[0114] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0115] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of this application. They are not intended to limit the scope of protection of this application. Any equivalent implementation methods or changes that do not deviate from the technical spirit of this application should be included in the scope of protection of this application.

Claims

1. A refrigeration system, characterized in that, It includes a refrigeration circuit, and the refrigeration circuit includes a compressor, a condenser, a dew removal tube group, a drying filter, a throttling assembly, and an evaporator connected in sequence. The dew removal tube group includes a first dew removal tube and a second dew removal tube arranged in parallel. The throttling assembly includes a first capillary tube and a second capillary tube arranged in parallel. The length of the first dew removal tube < the length of the second dew removal tube, and the inner diameter of the first capillary tube > the inner diameter of the second capillary tube.

2. The refrigeration system according to claim 1, wherein The refrigeration circuit further includes a first control valve provided at the inlet of the throttling assembly. The first control valve has a first outlet and a second outlet. The first outlet is communicated with the first capillary tube, and the second outlet is communicated with the second capillary tube. The refrigeration system further includes a controller, and the controller is connected to the first control valve and controls only the first outlet to be conducted, only the second outlet to be conducted, or both the first outlet and the second outlet to be conducted.

3. The refrigeration system according to claim 1 or 2, characterized in that, The refrigeration circuit further includes a second control valve provided at the inlet of the dew removal tube group. The second control valve has a first interface and a second interface. The first interface is connected to the first dew removal tube, and the second interface is connected to the second dew removal tube. The refrigeration system further includes a controller, and the controller is connected to the second control valve and controls the first interface and the second interface to be selectively opened.

4. The refrigeration system according to claim 3, wherein It further includes a defrost communication pipe connecting the second control valve and the evaporator. The defrost communication pipe is provided at the evaporator. The second control valve further has a third interface, and the third interface is connected to the defrost communication pipe. The controller controls the first interface, the second interface, and the third interface to be selectively opened.

5. A refrigeration device, characterized in that, It includes a refrigeration compartment and the refrigeration system according to any one of claims 1 to 4.

6. The refrigeration device according to claim 5, characterized in that, The refrigeration system further includes a controller. A first temperature sensor is disposed in the refrigeration chamber, and the controller is connected to the first temperature sensor to obtain the temperature T in the refrigeration chamber. R The controller is configured to: T R >the first preset temperature T R1 When it is the case, control the refrigerant outlet of the condenser to communicate with the first dew removal pipe, and control the refrigerant outlet of the drying filter to communicate with the first capillary tube and the second capillary tube simultaneously; The second preset temperature T R2 < T R ≤ T R1 When, control the refrigerant outlet of the condenser to communicate with the first dew removal pipe, and control the refrigerant outlet of the drying filter to communicate only with the first capillary tube.

7. The refrigeration device according to claim 6, characterized in that, The refrigeration device further includes a humidity meter for measuring the ambient humidity M, and a second temperature sensor for measuring the ambient temperature T E ; the controller is respectively connected to the humidity meter and the second temperature sensor for obtaining the ambient humidity M and the ambient temperature T E ; the controller is further configured to: If T R ≤ T R2 , then determine whether the ambient humidity M is greater than the preset humidity value M0, and whether the ambient temperature T E is lower than the preset temperature value T E0 ; If M ≤ M0 and T E <T E0 , then control the refrigerant outlet of the condenser to communicate with the first dew removal pipe, and control the refrigerant outlet of the drying filter to communicate only with the second capillary tube; If M ≤ M0 and T E ≥ T E0 , then control the refrigerant outlet of the condenser to communicate with the first dew removal pipe, and control the refrigerant outlet of the drying filter to communicate only with the first capillary tube.

8. The refrigeration device according to claim 7, characterized in that, The controller is further configured to: If T R ≤T R2 , then determine whether the environmental humidity M is greater than the preset humidity value M0, and whether the environmental temperature T E is lower than the preset temperature value T E0 ; If M > M0 and T E ≥ T E0 , then control the refrigerant outlet of the condenser to communicate with the second dew removal pipe, and control the refrigerant outlet of the drying filter to communicate only with the first capillary tube; If M > M0 and T E <T E0 , then control the refrigerant outlet of the condenser to communicate with the second dew removal pipe, and control the refrigerant outlet of the drying filter to communicate only with the second capillary tube.

9. The refrigeration device according to claim 7 or 8, characterized in that, M0 = 75%RH, T E0 = 25 °C.

10. The refrigeration device according to claim 6, characterized in that, The refrigeration device further includes a third temperature sensor disposed on the evaporator for detecting the temperature T of the evaporator C , the controller is connected to the third temperature sensor and is used to obtain the temperature T of the evaporator 6 C ; The controller is further used for: The temperature T of the evaporator C <Preset temperature T C0 When it is reached, control the refrigerant outlet of the condenser to communicate with the defrost connecting pipe provided at the evaporator, and cut off the refrigerant flowing out of the condenser from passing through the first dew removal pipe and the second dew removal pipe; from 0 to T C ≥T C0 When it is, control the refrigerant outlet of the condenser to communicate with the first dew removal pipe or the second dew removal pipe, and cut off the refrigerant flowing out of the condenser from passing through the defrost communication pipe.

11. A control method for a refrigeration device as claimed in claim 5, characterized in that, It includes: The temperature T in the refrigeration chamber R > the first preset temperature T R1 When it is, control the refrigerant outlet of the condenser to communicate with the first dew removal pipe, and control the refrigerant outlet of the dryer filter to communicate with the first capillary tube and the second capillary tube at the same time; The second preset temperature T R2 <T R ≤T R1 When, control the refrigerant outlet of the condenser to communicate with the first dew removal pipe, and control the refrigerant outlet of the drying filter to communicate only with the first capillary tube.

12. The control method of the refrigeration device according to claim 11, characterized in that, It further includes: If T R ≤ T R2 , it is determined whether the ambient humidity M is greater than the preset humidity value M0, and whether the ambient temperature T E is lower than the preset temperature value T E0 ; If M ≤ M0 and T E <T E0 , then control the refrigerant outlet of the condenser to communicate with the first dew removal pipe, and control the refrigerant outlet of the drying filter to communicate only with the second capillary tube; If M ≤ M0 and T E ≥ T E0 , then control the refrigerant outlet of the condenser to communicate with the first dew removal pipe, and control the refrigerant outlet of the drying filter to communicate only with the first capillary tube.

13. The control method of the refrigeration device according to claim 11, characterized in that, It further includes: If T R ≤ T R2 , then determine whether the environmental humidity M is greater than the preset humidity value M0, and whether the environmental temperature T E is lower than the preset temperature value T E0 ; If M > M0 and T E ≥ T E0 , then control the refrigerant outlet of the condenser to communicate with the second dew removal pipe, and control the refrigerant outlet of the drying filter to communicate only with the first capillary tube; If M > M0 and T E <T E0 , then control the refrigerant outlet of the condenser to communicate with the second dew removal pipe, and control the refrigerant outlet of the dryer filter to communicate only with the second capillary tube.

14. The control method of the refrigeration device according to claim 12 or 13, characterized in that, M0 = 75%RH, T E0 = 25 °C.

15. The control method of the refrigeration device according to claim 11, characterized in that, It further includes: The temperature T of the evaporator C <Preset temperature T C0 When it is reached, control the refrigerant outlet of the condenser to communicate with the defrosting connecting pipe provided at the evaporator, and cut off the refrigerant flowing out of the condenser from passing through the first dew removal pipe and the second dew removal pipe; from 0 to T C ≥T C0 When it is, control the refrigerant outlet of the condenser to communicate with the first dew removal pipe or the second dew removal pipe, and cut off the refrigerant flowing out of the condenser from passing through the defrosting communication pipe.

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