Refrigerating system, refrigerating device and control method of refrigerating device

Abstract

The invention provides a refrigerating system, a refrigerating device and a control method thereof.The refrigerating system comprises a refrigerating loop, the refrigerating loop comprises a compressor, a condenser, a dew removal pipe set, a drying filter, a throttling assembly and an evaporator which are connected in sequence, and the dew removal pipe set comprises a first dew removal pipe and a second dew removal pipe which are arranged in parallel; the throttling assembly comprises a first capillary tube and a second capillary tube which are arranged in parallel, and the length of the first dew removable tube is 1t; the length of the second dew removable tube and the inner diameter of the first capillary tube are gt; and the inner diameter of the second capillary tube. Compared with the prior art, by arranging the two dew removing pipes with different lengths in parallel and arranging the capillary pipes with different inner diameters in parallel, a refrigerant flow path and the flow of refrigerants flowing through the capillary pipes can be selectively controlled according to the operation condition of the refrigerator and the environment condition, so that the heat load of the refrigerating device is reduced, and the refrigerating efficiency is improved. The energy consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and particularly to a refrigeration system, a refrigeration device having the same, and a control method of the refrigeration device. Background Art

[0002] With the development of technology and the continuous improvement of technical level, refrigeration devices such as refrigerators and freezers have become essential appliances in residents' daily lives. In addition to being used in public places such as shopping malls and supermarkets, refrigeration devices have gradually entered thousands of households and become one of the essential household appliances. The refrigeration device cools refrigerated compartments such as a freezing compartment, a refrigerating compartment, and a variable-temperature compartment through a refrigeration system to provide a lower temperature environment for food and beverages, so as to facilitate the fresh storage of food and beverages.

[0003] However, during the daily use of the refrigeration device, the position where the door body mates with the cabinet body is prone to cold leakage, resulting in the temperature at the mating position of the door body and the cabinet body being 5 - 10°C lower than the ambient temperature. Dew condensation is very likely to occur at this position. However, to prevent or eliminate dew condensation, it is necessary to raise the temperature at this position to the ambient temperature or even higher, which is likely to increase the heat load of the refrigeration device and thus increase the energy consumption. Summary of the Invention

[0004] To solve the above technical problems, an object of the present invention is to provide a refrigeration system, a refrigeration device having the same, and a control method of the refrigeration device, so as to solve the problem of increased energy consumption of the refrigeration device due to preventing dew condensation at the mating position of the door body and the cabinet body.

[0005] To achieve one of the above object of the present invention, an embodiment of the present invention provides a refrigeration system, including a refrigeration circuit, the refrigeration circuit including a compressor, a condenser, a dew removal pipe group, a drying filter, a throttling component, and an evaporator connected in sequence. The dew removal pipe group includes a first dew removal pipe and a second dew removal pipe arranged in parallel. The throttling component includes a first capillary tube and a second capillary tube arranged in parallel. The length of the first dew removal pipe < the length of the second dew removal pipe, and the inner diameter of the first capillary tube > the inner diameter of the second capillary tube.

[0006] As a further improvement of an embodiment of the present invention, the refrigeration circuit further includes a first control valve provided at the inlet of the throttling component. 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;

[0007] The refrigeration system further includes a controller, which 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.

[0008] As a further improvement of an embodiment of the present invention, the refrigeration circuit further includes a second control valve provided at the inlet of the dew removal pipe group. The second control valve has a first interface and a second interface. The first interface is connected to the first dew removal pipe, and the second interface is connected to the second dew removal pipe;

[0009] The refrigeration system further includes a controller, which is connected to the second control valve and controls the first interface and the second interface to be selectively opened.

[0010] As a further improvement of an embodiment of the present invention, the refrigeration system 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.

[0011] To achieve one of the above-mentioned invention purposes, an embodiment of the present invention further provides a refrigeration device, including a refrigeration compartment and the refrigeration system as described above.

[0012] To achieve one of the above-mentioned invention purposes, an embodiment of the present invention further provides a control method for a refrigeration device, including:

[0013] The temperature T in the refrigeration compartment R > the first preset temperature 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 dryer filter to communicate with the first capillary tube and the second capillary tube at the same time;

[0014] 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 dryer filter to communicate only with the first capillary tube.

[0015] As a further improvement of an embodiment of the present invention, the control method of the refrigeration device further includes:

[0016] If T R ≤ T R2 , then judge 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 ;

[0017] 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;

[0018] 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.

[0019] As a further improvement of an embodiment of the present invention, the control method of the refrigeration device further includes:

[0020] 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 ;

[0021] 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;

[0022] 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.

[0023] As a further improvement of an embodiment of the present invention, M0 = 75%RH, T E0 = 25°C.

[0024] As a further improvement of an embodiment of the present invention, the control method of the refrigeration device further includes:

[0025] When the temperature T C of the evaporator is less than the preset temperature T C0 , 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;

[0026] Until T C ≥ T C0 , 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 connecting pipe.

[0027] Compared with the prior art, the present invention has the following beneficial effects: In the refrigeration system, refrigeration device and its control method of the present invention, the temperature at the joint of the box body and the door body can be raised to the ambient temperature or even higher by flowing the refrigerant through the dew removal pipe, so that condensation can be prevented. Further, by arranging two dew removal pipes with different lengths in parallel and arranging capillary tubes with different inner diameters in parallel, the refrigerant flow path and the refrigerant flow rate through the capillary tubes can be selectively controlled according to the operating conditions of the refrigerator and the environmental conditions, which is beneficial to reducing the heat load of the refrigeration device and saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. is a schematic structural diagram of a refrigeration circuit according to an embodiment of the present invention;

[0029] Figure 2 FIG. is a schematic structural diagram of a refrigeration circuit according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The present invention will be described in detail below with reference to the specific embodiments shown in the drawings.

[0031] In the various diagrams of the present invention, for the convenience of illustration, the sizes of some structures or parts are enlarged relative to other structures or parts. Therefore, it is only used to illustrate the basic structure of the subject matter of the present invention.

[0032] It should be understood that although the terms first, second, etc. may be used herein to describe various elements or structures, the objects described should not be limited by these terms. These terms are only used to distinguish these described objects from each other.

[0033] The refrigeration device provided by an embodiment of the present invention includes a box body and a door body. The box body has a refrigerating compartment, and the door body is used to open or close the refrigerating compartment. The refrigerating compartment may specifically be a refrigerating compartment, a freezing compartment or a variable temperature compartment.

[0034] The refrigeration device further includes a refrigeration system, which is arranged in the box body and supplies cold to the refrigerating compartment. Specifically, the refrigeration device may be set as a cold cabinet, a refrigerator, etc. to meet the needs of different users and different application scenarios.

[0035] See 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 removal pipe group 3, a dryer filter 4, a throttling assembly 5, and an evaporator 6 connected in sequence. The dew removal pipe group 3 includes a first dew removal pipe 31 and a second dew removal 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 removal pipe 31 < the length of the second dew removal pipe 32, and the inner diameter of the first capillary tube 51 > the inner diameter of the second capillary tube 52.

[0036] Among them, since the length of the first dew removal pipe 31 < the length of the second dew removal pipe 32, the heat generated by the refrigerant flowing through the first dew removal pipe 31 is also less than the heat generated by the refrigerant flowing through the second dew removal pipe 32. Since the inner diameter of the first capillary tube 51 > the inner diameter of the second capillary tube 52, the maximum flow rate of the refrigerant that can flow through the first capillary tube 51 is greater than the maximum flow rate of the refrigerant that can flow through the second capillary tube 52.

[0037] Specifically, both the first dew removal pipe 31 and the second dew removal pipe 32 are arranged on the box body and are located at the mating part of the box body and the door body. By flowing the refrigerant through the dew removal pipe, the temperature at the mating part of the box body and the door body can be raised to the ambient temperature or even higher, thereby preventing condensation from occurring. Further, by arranging two dew removal pipes with different lengths in parallel and arranging capillary tubes with different inner diameters in parallel, the refrigerant flow path and the refrigerant flow rate through the capillary tubes can be selectively controlled according to the operating conditions of the refrigerator and the ambient conditions, which is beneficial to reducing the heat load of the refrigeration device and saving energy consumption.

[0038] Further, the refrigeration circuit 100 further includes a first control valve 7 provided at the inlet of the throttling assembly 5. The first control valve 7 has a first outlet and a second outlet. The first outlet is communicated with the first capillary tube 51, and the second outlet is communicated with the second capillary tube 52.

[0039] The refrigeration system further includes a controller, which is connected to the first control valve 7 and controls only the first outlet to conduct, only the second outlet to conduct, or both the first outlet and the second outlet to conduct.

[0040] In this way, the two outlets of the first control valve 7 are respectively communicated with the two capillary tubes, and the controller controls the conduction conditions of the respective outlets of the first control valve 7, and further can control the flow conditions of the refrigerant in the respective capillary tubes, specifically including:

[0041] (1) When the controller controls only the first outlet to conduct, the refrigerant only passes through the first capillary tube 51. At this time, the refrigerant flow rate through the throttling assembly 5 is small, and it can be applied to the situation where the refrigeration capacity demand is small;

[0042] (2) When the controller controls only the second outlet to conduct, the refrigerant only passes through the second capillary 52. At this time, the refrigerant flow rate through the throttling component 5 is relatively larger than that in case (1), and it can be applied to the case with a relatively large cooling capacity requirement.

[0043] (3) When the controller controls both the first outlet and the second outlet to conduct, the refrigerant passes through the first capillary 51 and the second capillary 52 simultaneously. At this time, the refrigerant flow rate through the throttling component 5 is greater than that in cases (1) and (2), and it can be applied to the case with a particularly large cooling capacity requirement.

[0044] In this way, the refrigerant flow rate through the throttling component 5 can be controlled in real time according to the operating conditions of the refrigeration device, and then the cooling capacity generated by the refrigeration system can be controlled to avoid increasing the heat load and energy efficiency of the refrigeration device.

[0045] Preferably, the first control valve 7 is a three-way solenoid valve to achieve the on-off control of the first outlet and the second outlet respectively.

[0046] Further, the refrigeration circuit 100 further includes a second control valve 8 provided at the inlet of the dew removal pipe group 3. The second control valve 8 has a first interface and a second interface. The first interface is connected to the first dew removal pipe 31, and the second interface is connected to the second dew removal pipe 32; the controller is connected to the second control valve 8 and controls the first interface and the second interface to be selectively opened.

[0047] In this way, the two interfaces of the second control valve 8 are respectively connected to the two capillaries, and the on-off conditions of the respective interfaces of the second control valve 8 are controlled by the controller, and then the flow conditions of the refrigerant in each dew removal pipe can be controlled. Specifically, it includes:

[0048] (1) When the controller controls only the first interface to open, the refrigerant only passes through the first dew removal pipe 31. At this time, the heat generated by the dew removal pipe group 3 is relatively small, and it can be used for the case with a relatively small dew removal requirement.

[0049] (2) When the controller controls only the second interface to open, the refrigerant only passes through the second dew removal pipe 32. At this time, the heat generated by flowing through the dew removal pipe group 3 is relatively larger than that in case (1), and it can be used for the case with a relatively large dew removal requirement.

[0050] Correspondingly, the first control valve 7 can be a three-way solenoid valve to achieve the opening and closing control of the first interface and the second interface respectively.

[0051] See Figure 2, Further, the refrigeration system further includes a defrost communication pipe 9 connecting the second control valve 8 and the evaporator 6. The defrost communication pipe 9 is disposed at the evaporator 6. The second control valve 8 further has a third interface, and the third interface is connected to the defrost communication pipe 9. The controller controls the first interface, the second interface, and the third interface to be selectively opened.

[0052] That is to say, when the controller controls only the third interface to be opened, the refrigerant only passes through the defrost communication pipe 9, thereby defrosting the evaporator 6.

[0053] Preferably, the first control valve 7 can adopt a four-way solenoid valve to realize the opening and closing control of the first interface, the second interface, and the third interface respectively.

[0054] Among them, the evaporator 6 is used to refrigerate the refrigeration compartment. Specifically, the evaporator 6 can be used to refrigerate the refrigerated compartment, or can be used to refrigerate the frozen compartment, or the evaporator 6 is used to refrigerate the variable temperature compartment. A first temperature sensor is arranged in the refrigeration compartment to be used for detecting the temperature condition in the refrigeration compartment in real time.

[0055] Further, the controller is connected to the first temperature sensor to obtain the temperature T in the refrigeration compartment R . The controller is further used for:

[0056] T R > the first preset temperature T R1 When, control the refrigerant outlet of the condenser 2 to be communicated with the first dew removal pipe 31, and control the refrigerant outlet of the drying filter 4 to be communicated with the first capillary 51 and the second capillary 52 at the same time;

[0057] The second preset temperature T R2 < T R ≤ T R1 When, control the refrigerant outlet of the condenser 2 to be communicated with the first dew removal pipe 31, and control the refrigerant outlet of the drying filter 4 to be only communicated with the first capillary 51.

[0058] When the refrigeration device is initially powered on for refrigeration, or when it is powered on again after a long power outage, the temperature in the refrigeration compartment is relatively high, T R > T R1, the required refrigeration capacity is large, or when a large amount of hot food is put into the refrigeration chamber, the refrigeration chamber needs to be cooled quickly. In order to ensure sufficient refrigeration capacity, the refrigerant flow rate flowing through the throttling component 5 needs to be large. 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 refrigeration capacity of the refrigeration system can be increased and the refrigeration efficiency can be improved; and correspondingly, the refrigerant flow rate in the de-dew pipe group 3 is also large, and the heat generated by the de-dew pipe per unit length is also large. The refrigeration system is running at a high load. At this time, the first interface is controlled to be opened, that is, the refrigerant outlet of the condenser 2 is controlled to be connected with the first de-dew pipe 31, which can reduce the heat dissipated to the outside by the de-dew pipe group 3, thereby reducing the heat load of the refrigeration device and saving energy efficiency.

[0059] When the temperature in the refrigeration room is T R Down to T R2 <T R ≤T R1 At this time, the refrigeration capacity demand of the refrigeration chamber is reduced accordingly, so that the refrigerant flow rate flowing through the throttling component 5 can be reduced. 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 with the first capillary tube 51, which can meet the refrigeration 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 with the first dehumidification pipe 31, can not only meet the dehumidification demand, but also avoid the increase of energy consumption of the refrigeration device.

[0060] Furthermore, the refrigeration device further comprises a humidity measuring instrument for measuring the ambient humidity M, and a second temperature sensor for measuring the ambient temperature TE.

[0061] The controller is connected to the humidity measuring instrument and the second temperature sensor respectively to obtain the ambient humidity M and the ambient temperature T. E The controller is also used for:

[0062] 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 TE is lower than the preset temperature value T E0 ;

[0063] 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 second capillary tube 52;

[0064] If M≤M0 and T E ≥T E0, then control the refrigerant outlet of the condenser 2 to communicate with the first dew removal pipe 31, and control the refrigerant outlet of the dryer filter 4 to communicate only with the second capillary tube 52.

[0065] When the temperature T in the refrigeration compartment R drops to T R ≤T R2 , the cooling capacity requirement of the refrigeration compartment is small. If the environmental humidity is low, that is, M ≤ M0, then the dew point temperature of the refrigerant is low. At this time, the heat required for dew removal is small. Control the first interface to open, that is, control the refrigerant outlet of the condenser 2 to communicate with the first dew removal pipe 31, and the dew removal requirement can be met, avoiding an increase in the heat load of the refrigeration device.

[0066] Further, if the environmental temperature T E <T E0 , the temperature difference between the inside and outside of the refrigeration device is small. At this time, control the refrigerant outlet of the dryer filter 4 to communicate only with the second capillary tube 52, and the cooling capacity requirement in the refrigeration compartment can be met; if the environmental temperature T E ≥T E0 , the temperature difference between the inside and outside of the refrigeration device is large. At this time, control the refrigerant outlet of the dryer filter 4 to communicate only with the first capillary tube 51, so that the refrigerant flow rate through the throttling component 5 is large, and the cooling capacity requirement in the refrigeration compartment can be met.

[0067] Further, the controller is further configured to:

[0068] If M > M0 and T E ≥T E0 , then control the refrigerant outlet of the condenser 2 to communicate with the second dew removal pipe 32, and control the refrigerant outlet of the dryer filter 4 to communicate only with the first capillary tube 51;

[0069] If M > M0 and T E <T E0 , then control the refrigerant outlet of the condenser 2 to communicate with the second dew removal pipe 32, and control the refrigerant outlet of the dryer filter 4 to communicate only with the first capillary tube 51.

[0070] When the temperature T in the refrigeration compartment R drops to T R ≤T R2 , the cooling capacity requirement of the refrigeration compartment is small.

[0071] If the environmental temperature and humidity are high, that is, M > M0 and T E ≥T E0, the heat load of the refrigeration device is large, and a large amount of heat is required for dehumidification. At this time, controlling the second interface to open, that is, controlling the refrigerant outlet of the condenser 2 to communicate with the second dehumidification pipe 32, can meet the dehumidification requirement; and because the temperature difference between the inside and outside of the refrigeration device is large, at this time, controlling the refrigerant outlet of the drying filter 4 to only communicate with the first capillary tube 51 enables a large refrigerant flow rate through the throttling assembly 5 to meet the refrigeration capacity requirement in the refrigeration chamber.

[0072] If the environmental humidity is high and the environmental temperature is low, that is, M > M0 and T E < T E0 , a large amount of heat is required for dehumidification, while the heat load of the refrigeration device is small. At this time, controlling the second interface to open, that is, controlling the refrigerant outlet of the condenser 2 to communicate with the second dehumidification pipe 32, can meet the dehumidification requirement; and because the temperature difference between the inside and outside of the refrigeration device is small, at this time, controlling the refrigerant outlet of the drying filter 4 to only communicate with the second capillary tube 52 can meet the refrigeration capacity requirement in the refrigeration chamber.

[0073] Preferably, M0 = 75% RH, T E0 = 25 °C.

[0074] Furthermore, the refrigeration device further includes a third temperature sensor disposed at the evaporator 6 for detecting the temperature T C of the evaporator 6, and the controller is connected to the third temperature sensor and is used to obtain the temperature T C of the evaporator 6.

[0075] In addition, the controller is further used for:

[0076] When the temperature T C of the evaporator 6 is less than the preset temperature T C0 , controlling the refrigerant outlet of the condenser 2 to communicate with the defrosting connecting pipe 9 disposed at the evaporator 6, and cutting off the refrigerant flowing out of the condenser 2 from passing through the first dehumidification pipe 31 and the second dehumidification pipe 32;

[0077] When it reaches T C ≥ T C0 , controlling the refrigerant outlet of the condenser 2 to communicate with the first dehumidification pipe 31 or the second dehumidification pipe 32, and cutting off the refrigerant flowing out of the condenser 2 from passing through the defrosting connecting pipe 9.

[0078] In this way, when the evaporator 6 frosts, by detecting the temperature T C of the evaporator 6, when T C is less than the preset temperature T C0 , controlling the refrigerant flowing out of the condenser 2 to flow to the defrosting connecting pipe 9, thereby defrosting the condenser 2 to prevent the refrigeration effect of the refrigeration device from being affected due to frosting of the condenser 2.

[0079] Correspondingly, an embodiment of the present invention further provides a control method for a refrigeration device, including:

[0080] The temperature T in the refrigeration compartment R > the first preset temperature T R1 When, control the refrigerant outlet of the condenser 2 to communicate with the first dew removal pipe 31, and control the refrigerant outlet of the drying filter 4 to communicate with the first capillary 51 and the second capillary 52 simultaneously;

[0081] The second preset temperature T R2 < T R ≤ T R1 When, control the refrigerant outlet of the condenser 2 to communicate with the first dew removal pipe 31, and control the refrigerant outlet of the drying filter 4 to communicate only with the first capillary 51.

[0082] Furthermore, the control method further includes:

[0083] 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 TE is lower than the preset temperature value T E0 ;

[0084] If M ≤ M0 and T E < T E0 , then control the refrigerant outlet of the condenser 2 to communicate with the first dew removal pipe 31, and control the refrigerant outlet of the drying filter 4 to communicate only with the second capillary 52;

[0085] If M ≤ M0 and T E ≥ T E0 , then control the refrigerant outlet of the condenser 2 to communicate with the first dew removal pipe 31, and control the refrigerant outlet of the drying filter 4 to communicate only with the first capillary 51.

[0086] Furthermore, the control method further includes:

[0087] If TR ≤ 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 ;

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

[0089] If M > M0 and T E < T E0 , then control the refrigerant outlet of the condenser 2 to communicate with the second dew removal pipe 32, and control the refrigerant outlet of the dryer filter 4 to communicate only with the first capillary tube 51.

[0090] Furthermore, the control method further includes:

[0091] The temperature T of the evaporator 6 C < preset temperature T C0 When, control the refrigerant outlet of the condenser 2 to communicate with the defrost communication pipe 9 provided at the evaporator 6, and cut off the refrigerant flowing out of the condenser 2 from passing through the first dew removal pipe 31 and the second dew removal pipe 32;

[0092] To T C ≥ T C0 When, control the refrigerant outlet of the condenser 2 to communicate with the first dew removal pipe 31 or the second dew removal pipe 32, and cut off the refrigerant flowing out of the condenser 2 from passing through the defrost communication pipe 9.

[0093] Compared with the prior art, the refrigeration system, refrigeration device and its control method provided by the present invention have the beneficial effects that: by flowing the refrigerant through the dew removal pipe, the temperature at the joint of the box body and the door body can be raised to the ambient temperature or even higher, so as to prevent condensation from occurring. Further, by arranging two dew removal pipes with different lengths in parallel and arranging capillary tubes with different inner diameters in parallel, the refrigerant flow path and the refrigerant flow rate through the capillary tubes can be selectively controlled according to the operating conditions of the refrigerator and the environmental conditions, which is beneficial to reducing the heat load of the refrigeration device and saving energy consumption.

[0094] It should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0095] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not used to limit the protection scope of the present invention. Any equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

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 component, and an evaporator that are sequentially connected. The dew removal tube group includes a first dew removal tube and a second dew removal tube arranged in parallel. The throttling component 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 component. 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. 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. 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. A control method for a refrigeration device as described 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 drying 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.

7. The control method of the refrigeration device according to claim 6, 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 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 control method of the refrigeration device according to claim 6, characterized in that, It further includes: If T R ≤ T R2 , it is determined 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 first capillary tube.

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

10. The control method of the refrigeration device according to claim 6, 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 defrost communication pipe.

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