Refrigerator

Abstract

The embodiment of the invention belongs to the technical field of household appliances, and provides a refrigerator. The refrigerator comprises a refrigerator body and a refrigerating system arranged in the refrigerator body. The refrigerating system comprises a compressor, a condenser, an evaporator and a flow control assembly. Wherein a first pipe orifice of the flow control assembly is connected with the condenser, and a second pipe orifice of the flow control assembly is connected with the evaporator. The flow control assembly is configured in the mode that when the refrigerating system is in a refrigerating mode, refrigerants enter the flow control assembly from the first pipe opening and flow out of the second pipe opening, and the flow of the refrigerants flowing out of the second pipe opening is the first flow. When the refrigerating system is in the defrosting mode, the refrigerant enters the flow control assembly from the second pipe opening and flows out of the first pipe opening, and the flow of the refrigerant flowing out of the first pipe opening is second flow. Wherein the first flow is smaller than the second flow. By means of the flow control assembly, the flow of the refrigerant in the defrosting mode is larger than the flow of the refrigerant in the refrigerating mode, and therefore the defrosting efficiency is improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of household appliances. More particularly, a refrigerator is provided. BACKGROUND

[0002] When the surface temperature of the finned evaporator is lower than the air dew point temperature and lower than 0℃, frost will form on the surface of the evaporator when the air-cooled refrigerator is in the refrigeration mode. As the frost layer becomes thicker, defrosting needs to be performed to avoid frost blocking the finned evaporator, which reduces the heat exchange efficiency and causes the temperature of the compartment to rise.

[0003] Currently, defrosting can be performed by means of reverse flow of refrigerant when the defrosting mode is started. Specifically, the refrigerant is reversely flowed in each mechanism in the refrigeration system, and the high-temperature and high-pressure gas flowing out of the compressor enters the evaporator to defrost the evaporator by using the heat of the high-temperature and high-pressure gas. In order to improve the defrosting efficiency, defrosting can be performed in a combination of electric heating defrosting and reverse flow defrosting. However, the heater body for electric heating defrosting has a high temperature, and safety distance control, heat insulation protection and temperature fuse protection need to be performed, which has certain safety hazards, and the heat utilization rate is low.

[0004] Therefore, how to improve the defrosting efficiency when the reverse flow defrosting is performed in the refrigerator is a problem to be solved. SUMMARY

[0005] Embodiments of the present application provide a refrigerator, which can be used to improve the defrosting efficiency when the reverse flow defrosting is performed in the refrigerator in the defrosting mode.

[0006] In a first aspect, embodiments of the present application provide a refrigerator, comprising:

[0007] a cabinet;

[0008] a refrigeration system arranged in the cabinet, comprising a compressor, a condenser, an evaporator and a flow control assembly;

[0009] The compressor is in communication with the condenser and the evaporator, respectively, and an electromagnetic valve is arranged between the compressor and the condenser and the evaporator. When the refrigeration system is in the defrosting mode, the electromagnetic valve makes the compressor in communication with the condenser, and the refrigerant flowing out of the compressor flows to the evaporator through the condenser. When the refrigeration system is in the refrigeration mode, the electromagnetic valve makes the compressor in communication with the evaporator, and the refrigerant flowing out of the compressor flows to the evaporator.

[0010] The first pipe opening of the flow control assembly is connected with the condenser, the second pipe opening of the flow control assembly is connected with the evaporator, and the flow control assembly is configured to:

[0011] when the refrigeration system is in the defrost mode, controlling the refrigerant to enter the flow control component from the second port, to flow out from the first port, and the flow rate of the refrigerant flowing out from the first port is a second flow rate;

[0012] when the refrigeration system is in the defrost mode, controlling the refrigerant to enter the flow control component from the second port, to flow out from the first port, and the flow rate of the refrigerant flowing out from the first port is a second flow rate;

[0013] wherein the first flow rate is less than the second flow rate.

[0014] In the embodiment, the refrigerator comprises a cabinet and a refrigeration system arranged in the cabinet. The refrigeration system comprises a compressor, a condenser, an evaporator and a flow control component. The first port of the flow control component is connected with the condenser, and the second port of the flow control component is connected with the evaporator. When the refrigeration system is in the refrigeration mode, the refrigerant enters the flow control component from the first port, flows out from the second port, and the flow rate of the refrigerant flowing out from the second port is a first flow rate. When the refrigeration system is in the defrost mode, the refrigerant enters the flow control component from the second port, flows out from the first port, and the flow rate of the refrigerant flowing out from the first port is a second flow rate. The first flow rate is less than the second flow rate. The flow control component can realize that the flow rate of the refrigerant in the defrost mode is greater than the flow rate of the refrigerant in the refrigeration mode, thereby improving the defrost efficiency.

[0015] In some embodiments of the present application, the flow control component comprises a first branch, a second branch, a second drying filter and a one-way valve.

[0016] wherein the first branch is provided with a first throttling device and a first drying filter; and the second branch is provided with a second throttling device.

[0017] The first drying filter is connected with the first port and the first end of the first throttling device respectively, the second end of the first throttling device is connected with the first end of the second throttling device, and the second end of the second throttling device is connected with the evaporator through the second drying filter.

[0018] The inlet of the one-way valve is connected with the second end of the second throttling device, and the outlet of the one-way valve is connected with the first end of the second throttling device.

[0019] In the embodiment, the first throttling device and the second throttling device are arranged in series. In the refrigeration mode, both throttling devices are opened to reduce the flow rate of the refrigerant. In the defrost mode, only one throttling device is opened to increase the flow rate of the refrigerant, thereby improving the defrost efficiency.

[0020] In some embodiments of the present application, the electromagnetic valve comprises a first connection port, a second connection port, a third connection port and a fourth connection port;

[0021] The first connection port is connected with the exhaust port of the compressor; the second connection port is connected with the condenser; the third connection port is connected with the inlet port of the compressor through a first pipeline; and the fourth connection port is connected with the evaporator.

[0022] Part of the first pipeline is arranged in close contact with the first throttling device and the second throttling device.

[0023] In the present embodiment, the first throttling device and the second throttling device are arranged in close contact with the first pipeline, so that the cold energy of the pipeline is given to the refrigerant in the throttling device, and the temperature of the refrigerant in the close-contact designed throttling device is relatively low, thereby improving the supercooling degree of the refrigerator.

[0024] In some embodiments of the present application, the flow rate of the first throttling device is greater than the flow rate of the second throttling device.

[0025] In the present embodiment, by setting the flow rate of the first throttling device to be greater than the flow rate of the second throttling device, the flow rate of the refrigerant in the refrigeration mode can be further reduced, thereby achieving energy saving.

[0026] In some embodiments of the present application, the flow control assembly comprises a first throttling device and a second throttling device.

[0027] The flow control assembly is configured to:

[0028] When the refrigeration system is in the refrigeration mode, the target throttling device is turned on, and the refrigerant flowing out of the condenser flows to the evaporator through the target throttling device; the target throttling device is the first throttling device or the second throttling device.

[0029] When the refrigeration system is in the defrosting mode, the first throttling device and the second throttling device are turned on, and the refrigerant flowing out of the condenser flows to the evaporator through the first throttling device and the second throttling device.

[0030] In the present embodiment, by arranging the first throttling device and the second throttling device in parallel, only one throttling device is turned on in the refrigeration mode to reduce the flow rate of the refrigerant. In the defrosting mode, two throttling devices are turned on to increase the flow rate of the refrigerant, thereby improving the defrosting efficiency.

[0031] In some embodiments of the present application, the flow control assembly comprises:

[0032] a first branch having a first throttling device and a first drying filter disposed thereon; two ends of the first drying filter being connected to the first pipe opening and the first end of the first throttling device, respectively, and a second end of the first throttling device being connected to the second pipe opening;

[0033] a second branch arranged in parallel with the first branch, on which a second throttling device and a one-way valve are provided; the two ends of the second throttling device are respectively connected to the second pipe opening and the inlet of the one-way valve, and the outlet of the one-way valve is connected to the first pipe opening;

[0034] The second drying filter has two ends connected to the evaporator and the second pipe port respectively.

[0035] In this embodiment, by providing a one-way valve on the second branch, it is possible to open only one throttling device in the cooling mode to reduce the refrigerant flow rate, and to open both throttling devices in the defrosting mode to increase the refrigerant flow rate, thereby improving the defrosting efficiency.

[0036] In some embodiments of the present application, the solenoid valve includes a first connection port, a second connection port, a third connection port, and a fourth connection port;

[0037] The first connection port is connected to the exhaust port of the compressor; the second connection port is connected to the condenser; the third connection port is connected to the air inlet of the compressor through a first pipeline; and the fourth connection port is connected to the evaporator.

[0038] Part of the first pipeline is arranged in close contact with the first throttling device.

[0039] In this embodiment, the first throttling device is fitted to the first pipeline so that the cooling capacity of the pipeline is given to the refrigerant in the throttling device, making the refrigerant temperature of the fitted throttling device lower, thereby improving the supercooling degree of the refrigerator.

[0040] In some embodiments of the present application, the portion of the pipeline is arranged in close contact with the second throttling device and is arranged between the first throttling device and the second throttling device.

[0041] In this embodiment, the first throttling device and the second throttling device are arranged in close contact with the first pipeline, so that the coldness of the pipeline is given to the refrigerant in the throttling device, so that the refrigerant temperature of the throttling device with close contact design is lower, thereby improving the supercooling degree of the refrigerator.

[0042] In some embodiments of the present application, the flow control assembly further includes a switching valve, a first drying filter, and a second drying filter; wherein the switching valve includes an inlet, a first outlet, and a second outlet;

[0043] The two ends of the first dry filter are connected with the condenser and the inlet of the switching valve respectively; the first outlet is connected with the first throttling device, and the second outlet is connected with the second throttling device; the first end of the second dry filter is connected with the evaporator, and the second end of the second dry filter is connected with the first throttling device and the second throttling device respectively;

[0044] The switching valve is configured to:

[0045] When the refrigeration system is in the refrigeration mode, the inlet and the first outlet are controlled to be communicated, and the refrigerant flowing out of the first dry filter flows to the second dry filter through the first throttling device, or the inlet and the second outlet are controlled to be communicated, and the refrigerant flowing out of the first dry filter flows to the second dry filter through the second throttling device;

[0046] When the refrigeration system is in the defrosting mode, the inlet is controlled to be communicated with the first outlet and the second outlet, and the refrigerant flowing out of the second dry filter flows to the first dry filter through the first throttling device and the second throttling device.

[0047] In the embodiment, only one throttling device is opened in the refrigeration mode to reduce the refrigerant flow by the switching valve control. In the defrosting mode, two throttling devices are opened to increase the refrigerant flow, so that the defrosting efficiency can be improved.

[0048] In some embodiments of the application, the flow of the first throttling device is smaller than the flow of the second throttling device.

[0049] In the embodiment, the flow of the first throttling device is smaller than the flow of the second throttling device, which can further reduce the flow of the refrigerant in the refrigeration mode, so as to save energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the application or the implementation manners in the related art, the drawings needed to be used in the embodiment or the related art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0051] Figure 1 A schematic diagram of a refrigerator provided by the embodiment of the application;

[0052] Figure 2 A structural schematic diagram of a refrigerator provided by the embodiment of the application;

[0053] Figure 3A schematic view of the flow direction of refrigerant in the refrigeration system 103 of the example of the present application in the refrigeration mode;

[0054] Figure 4 A schematic view of the flow direction of refrigerant in the refrigeration system 103 of the example of the present application in the defrosting mode;

[0055] Figure 5 A schematic view of the structure of a refrigeration system 103 provided by the example of the present application;

[0056] Figure 6 A schematic view of the structure of a refrigeration system 103 provided by the example of the present application;

[0057] Figure 7 A schematic view of the structure of a refrigeration system 103 provided by the example of the present application;

[0058] Figure 8 A schematic view of the structure of a refrigeration system 103 provided by the example of the present application;

[0059] Figure 9 A schematic view of the structure of a refrigeration system 103 provided by the example of the present application;

[0060] Figure 10 A schematic view of the structure of a refrigeration system 103 provided by the example of the present application;

[0061] Figure 11 A schematic view of the structure of a refrigeration system 103 provided by the example of the present application.

[0062] Explanation of reference numerals:

[0063] 10 - refrigerator; 11 - refrigeration chamber;

[0064] 101 - cabinet; 102 - door body;

[0065] 103 - refrigeration system; 104 - control assembly;

[0066] 31 - compressor; 32 - condenser;

[0067] 33 - evaporator; 34 - electromagnetic valve;

[0068] 35 - flow control assembly; 351 - second dry filter;

[0069] 352 - one-way valve; 353 - first throttling device;

[0070] 354 - first dry filter; 355 - second throttling device;

[0071] 356 - switching valve; a1 - first pipe opening;

[0072] a2 - second port; b1 - first connection port;

[0073] b2 - second connection port; b3 - third connection port;

[0074] b4 - fourth connection port; a6 - inlet;

[0075] a7 - valve outlet; a3 - inlet;

[0076] a4 - first outlet; a5 - second outlet. DETAILED DESCRIPTION

[0077] For the purpose of making the purpose, implementation and advantages of the present application more clear, the following will combine the drawings in the exemplary embodiments of the present application to clearly and completely describe the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, but not all the embodiments.

[0078] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the subsequently described embodiments, and is not intended to limit the embodiments of the present application. Unless otherwise specified, these terms should be understood according to their ordinary and general meanings.

[0079] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclusive inclusion, for example, a product or device including a series of components does not have to be limited to the clearly listed components, but can include other components that are not clearly listed or inherent to these products or devices.

[0080] In the refrigeration process of the air-cooled refrigerator, when the surface temperature of the finned evaporator is lower than the dew point temperature of the air and lower than 0℃, frost will be formed on the surface of the evaporator. With the passage of time, the frost layer becomes thicker and thicker, and defrosting treatment is needed to avoid frost blockage of the finned evaporator, resulting in reduced heat exchange efficiency, small air duct cross section, poor air circulation and rising temperature in the compartment.

[0081] At present, the evaporator on the high-back pressure, high-evaporator-temperature refrigeration equipment such as air conditioner can be defrosted by heat pump defrosting. Specifically, heat pump defrosting refers to a process of removing ice and frost on the surface of the evaporator in the refrigeration equipment by using heat pump technology. Among them, high back pressure refers to the pressure of refrigerant in the condenser in the refrigeration cycle is relatively high.

[0082] However, the refrigerator has the characteristics of low back pressure, low evaporation temperature and small refrigeration system, which is quite different from the design of large refrigeration system with high back pressure. When the heat pump defrosting method is applied to the refrigerator, there is a difference in the heat exchange capacity ratio of the high-pressure end heat exchanger and the low-pressure end heat exchanger when the refrigerant flows forward and reversely.

[0083] In other words, the heat exchange ratio between the high-pressure and low-pressure heat exchangers in a refrigerator is determined by the cooling requirements of the refrigerant's forward flow. During reverse refrigerant flow, the original high-pressure heat exchanger becomes the low-pressure heat exchanger, and the original low-pressure heat exchanger becomes the high-pressure heat exchanger. This alters the heat exchange ratio, causing a mismatch in the defrost mode, reducing the refrigeration system's heat exchange efficiency and resulting in poor defrost performance. The low-pressure heat exchanger can be an evaporator, and the high-pressure heat exchanger can be a condenser.

[0084] If the heat exchange ratio of the refrigeration system is adjusted, the refrigeration capacity of the original refrigeration system will be reduced.

[0085] Currently, to improve defrost efficiency, a combination of electric and countercurrent defrost is used. However, the high temperature of the heater used for electric defrost requires safety distance control, thermal insulation, and temperature fuse protection, posing certain safety risks. Furthermore, heat radiation is uneven during the defrost process, with some heat escaping, resulting in less heat available for defrosting and low heat utilization.

[0086] Therefore, the present application provides a refrigerator, which, by arranging a flow control component between the evaporator and the condenser, increases the flow rate of the countercurrent refrigerant in the refrigeration system through the flow control component during countercurrent defrosting, thereby improving the heat transfer inside the evaporator and accelerating the melting rate of the frosted surface, thereby improving the defrosting efficiency.

[0087] The technical solution of the present application is described in detail below in conjunction with specific embodiments. The following specific embodiments can be combined with each other or exist independently. For the same or similar concepts or processes, some embodiments may not be described in detail. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0088] First, the specific structure of a refrigerator provided in an embodiment of the present application is described. For example, Figure 1 A schematic diagram of a refrigerator provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the refrigerator 10 includes a body 101 , a door 102 , and a storage chamber arranged in the body 101 .

[0089] In one possible implementation, Figure 1 As shown, the storage compartment includes a refrigerating compartment 11 and a freezing compartment. Figure 1 The freezer compartment is not shown.

[0090] I understand. Figure 1 This is only a schematic diagram of a refrigerator applicable to this application. It can also be a refrigerator with other structures, and this application does not limit this.

[0091] In a possible implementation, the refrigerator 10 further comprises a refrigeration system 103 and a control assembly 104. The refrigeration system 103 and the control assembly 104 can be electrically connected.

[0092] An exemplary refrigeration system 103 is shown in FIG. 1. Figure 2 A schematic structural diagram of a refrigerator is provided for the embodiments of the present application, as shown in Figure 2 The refrigeration system 103 comprises a compressor 31, a condenser 32, and an evaporator 33.

[0093] The compressor 31 is configured to provide power for refrigeration of the refrigerator 10.

[0094] The condenser 32 is configured to dissipate heat from the refrigerant from the compressor 31.

[0095] The evaporator 33 is configured to provide cold energy for the refrigeration chamber 11 and / or the freezing chamber.

[0096] The compressor 31 is in communication with the condenser 32 and the evaporator 33, respectively, and the electromagnetic valve 34 is arranged between the compressor 31 and the condenser 32 and the evaporator 33. The electromagnetic valve 34 can control the flow direction of the refrigerant flowing out of the compressor 31. For example, in the refrigeration mode, the flow direction of the refrigerant is controlled to be from the compressor 31 to the condenser 32, and in the defrosting mode, the flow direction of the refrigerant is controlled to be from the compressor 31 to the evaporator 33.

[0097] Specifically, the electromagnetic valve 34 and the control assembly 104 are electrically connected, and the control assembly 104 can control the electromagnetic valve 34 according to the mode of the refrigerant.

[0098] In a possible implementation, referring to Figure 3 or Figure 4 The electromagnetic valve 34 comprises a first connecting port b1, a second connecting port b2, a third connecting port b3, and a fourth connecting port b4. The first connecting port b1 is in communication with the exhaust port of the compressor 31, the second connecting port b2 is in communication with the condenser 32, the third connecting port b3 is in communication with the air inlet port of the compressor 31, and the fourth connecting port b4 is in communication with the evaporator 33.

[0099] The control assembly 104 is configured to:

[0100] When the refrigeration system 103 is in the refrigeration mode, the first connecting port b1 and the second connecting port b2 of the electromagnetic valve 34 are in communication, and the third connecting port b3 and the fourth connecting port b4 are in communication. The refrigerant flowing out of the exhaust port of the compressor 31 flows to the condenser 32, then flows to the evaporator 33 through the condenser 32, and finally flows to the compressor 31 to complete the refrigeration cycle of the refrigerator.

[0101] When the refrigeration system 103 is in the defrosting mode, the first port b1 of the electromagnetic valve 34 is in communication with the fourth port b4, and the second port b2 is in communication with the third port b3. The refrigerant flowing out of the exhaust port of the compressor 31 flows to the evaporator 33, then to the condenser 32, and finally to the compressor 31.

[0102] As an example, Figure 3 A schematic diagram of the flow direction of the refrigerant when the refrigeration system 103 of the present application is in the refrigeration mode is shown in Figure 3 As shown, the low-temperature, low-pressure refrigerant is sucked into the compressor 31, compressed into high-temperature, high-pressure refrigerant in the cylinder of the compressor 31, and then enters the condenser 32 through the electromagnetic valve 34. The high-temperature, high-pressure refrigerant gas is cooled by the condenser 32, and the temperature gradually decreases to become a normal-temperature, high-pressure saturated vapor. Then, the refrigerant is throttled and reduced in pressure by the throttling device between the condenser 32 and the evaporator 33 to become a normal-temperature, low-pressure wet vapor. Subsequently, the refrigerant absorbs heat in the evaporator 33 to vaporize, not only reducing the temperature of the evaporator 33 and its surroundings, but also changing the refrigerant into a low-temperature, low-pressure gas. Thus, the refrigeration cycle of the refrigerator is completed by the compressor 31.

[0103] As an example, Figure 4 A schematic diagram of the flow direction of the refrigerant when the refrigeration system 103 of the present application is in the defrosting mode is shown in Figure 4 As shown, the low-temperature, low-pressure refrigerant is sucked into the compressor 31, compressed into high-temperature, high-pressure refrigerant in the cylinder of the compressor 31, and then enters the condenser 32 through the electromagnetic valve 34. The high-temperature, high-pressure refrigerant gas is cooled by the condenser 32, and the temperature gradually decreases to become a normal-temperature, high-pressure saturated vapor. Then, the refrigerant is throttled and reduced in pressure by the throttling device between the condenser 32 and the evaporator 33 to become a normal-temperature, low-pressure wet vapor. Subsequently, the refrigerant absorbs heat in the evaporator 33 to vaporize, not only reducing the temperature of the evaporator 33 and its surroundings, but also changing the refrigerant into a low-temperature, low-pressure gas. Thus, the refrigeration cycle of the refrigerator is completed by the compressor 31.

[0104] In one possible implementation, Figure 5 A schematic diagram of the structure of a refrigeration system 103 according to an embodiment of the present application is shown in Figure 5 As shown, the refrigeration system 103 further includes a flow control assembly 35. The flow control assembly 35 is provided with two outlets: a first pipe port a1 and a second pipe port a2.

[0105] The first pipe port a1 of the flow control assembly 35 is connected to the condenser 32, and the second pipe port a2 of the flow control assembly 35 is connected to the evaporator 33. The flow control assembly 35 is configured to:

[0106] When the refrigeration system 103 is in the refrigeration mode, the flow control assembly 35 controls the refrigerant to flow into the flow control assembly from the first pipe port a1 and out of the second pipe port a2, and the flow rate of the refrigerant flowing out of the second pipe port a2 is a first flow rate.

[0107] When the refrigeration system 103 is in the defrosting mode, the refrigerant is controlled to flow into the flow control assembly from the second port a2 and flow out from the first port a1, and the flow rate of the refrigerant flowing out from the first port a1 is a second flow rate.

[0108] The first flow rate is less than the second flow rate.

[0109] In the embodiment, the flow rate of the refrigerant in the defrosting mode is greater than the flow rate of the refrigerant in the refrigeration mode by the flow control assembly 35, so that the defrosting efficiency is improved.

[0110] In a possible implementation, the first flow rate can be less than the flow rate of the refrigerant in a conventional refrigeration mode (i.e., a non-rapid cooling mode, etc.) currently provided in a refrigerator. Since the heat exchange amount required by the refrigeration system 103 is small in the conventional refrigeration mode, reducing the flow rate of the refrigerant in the refrigeration system 103 by the flow control assembly 35 can reduce the heat exchange amount per unit time, so that the system load and work are small, and thus the power consumption can be reduced.

[0111] In a possible implementation, Figure 6 A structural schematic diagram of a refrigeration system 103 provided by the embodiment of the present application is shown in FIG. 3. Figure 6 As shown in FIG. 3, the flow control assembly 35 includes a first branch, a second branch, a second drying filter 351, and a one-way valve 352.

[0112] The first branch is provided with a first throttling device 353 and a first drying filter 354. The second branch is provided with a second throttling device 355.

[0113] The first drying filter 354 is connected to the first port a1 and the first end of the first throttling device 353 at two ends, respectively. The second end of the first throttling device 353 is connected to the first end of the second throttling device 355. The second end of the second throttling device 355 is connected to the evaporator 33 through the second drying filter 351.

[0114] The inlet a6 of the one-way valve 352 is connected to the second end of the second throttling device 355. The valve body outlet a7 of the one-way valve 352 is connected to the first end of the second throttling device 355.

[0115] When the refrigeration system 103 is in the refrigeration mode, the one-way valve 352 is not connected at this time. The refrigerant flowing out from the condenser 32 flows to the first throttling device 353 through the first drying filter 354, and then flows to the second throttling device 355, and flows to the evaporator 33 through the second drying filter 351.

[0116] When the refrigeration system 103 is in the defrosting mode, the refrigerant flowing out of the evaporator 33 passes through the second dry filter 351, flows to the one-way valve 352, then passes through the first throttling device 353, flows to the first dry filter 354, and then flows to the condenser 32.

[0117] It can be understood that, due to the flow rate of the pipeline in which the one-way valve 352 is located being much greater than the flow rate of the capillary tube, the resistance of one passage in the two passages is large, and the resistance of the other passage is small, so that the refrigerant flows to the passage with small resistance, that is, flows from the second dry filter 351 to the one-way valve 352.

[0118] In the embodiment, when the refrigeration system 103 is in the defrosting mode, the refrigerant only passes through the first throttling device 353 (that is, does not pass through the second throttling device 355), and the resistance is small, so that the flow rate of the refrigerant flowing through is large, thereby improving the defrosting efficiency. When the refrigeration system 103 is in the refrigeration mode, the refrigerant passes through the first throttling device 353 and the second throttling device 355 in turn, which is equivalent to increasing the length of the pipeline and increasing the resistance, so that the flow rate of the refrigerant flowing through is small, thereby reducing the power consumption of the refrigerator.

[0119] In a possible implementation, the third connection port b3 of the electromagnetic valve 34 is connected to the suction port of the compressor 31 through a first pipeline, and a part of the first pipeline is arranged in close contact with the first throttling device 353 and the second throttling device 355.

[0120] Figure 7 A structure schematic diagram of a refrigeration system 103 provided in the embodiment is shown in FIG. 1. Figure 7 As shown in FIG. 1, the first pipeline can be extended, so that a part of the pipeline can be arranged in close contact with the first throttling device 353 and the second throttling device 355, so that the cold energy of the pipeline is conducted into the first throttling device 353 and the second throttling device 355, and the temperature of the refrigerant in the first throttling device 353 and the second throttling device 355 can be reduced, thereby improving the supercooling degree of the refrigerator, and the cold energy of the refrigeration system 103 is reused, thereby achieving energy saving.

[0121] It can be understood that, by this method, the supercooling degree of the refrigerator is improved, and the improvement is small, which does not cause excessive freezing or icing of food, thereby affecting the taste and quality of the food.

[0122] In a possible implementation, in the refrigeration system of Figure 6 and Figure 7 , the flow rate of the first throttling device 353 can be greater than the flow rate of the second throttling device 355. By setting the flow rate of the first throttling device 353 to be greater than the flow rate of the second throttling device 355, the flow rate of the refrigerant in the refrigeration mode can be further reduced, thereby achieving energy saving.

[0123] Next, another refrigeration system provided by the present application is described.

[0124] In a possible implementation, the flow control component 35 includes a first throttling device 353 and a second throttling device 355. The flow control component 35 is configured to:

[0125] When the refrigeration system 103 is in the refrigeration mode, the target throttling device is turned on, and the refrigerant flowing from the condenser 32 flows to the evaporator 33 through the target throttling device. The target throttling device is the first throttling device 353 or the second throttling device 355.

[0126] When the refrigeration system 103 is in the defrosting mode, the first throttling device 353 or the second throttling device 355 is turned on, and the refrigerant flowing from the condenser 32 flows to the evaporator 33 through the first throttling device 353 or the second throttling device 355.

[0127] Specifically, the first throttling device 353 or the second throttling device 355 can be arranged in parallel, so that in the refrigeration mode, only one throttling device is turned on to reduce the refrigerant flow. In the defrosting mode, both throttling devices are turned on to increase the refrigerant flow, so that the defrosting efficiency can be improved.

[0128] In a possible implementation, Figure 8 A structure schematic diagram of a refrigeration system 103 provided by an embodiment of the present application is shown in FIG. 3. Figure 8 As shown in FIG. 3, the flow control component 35 includes:

[0129] A first branch, on which a first throttling device 353 and a first dry filter 354 are arranged. The two ends of the first dry filter 354 are respectively connected to a first pipe opening a1 and a first end of the first throttling device 353, and a second end of the first throttling device 353 is connected to a second pipe opening a2.

[0130] A second branch arranged in parallel with the first branch, on which a second throttling device 355 and a check valve 352 are arranged. The two ends of the second throttling device 355 are respectively connected to the second pipe opening a2 and an inlet a6 of the check valve 352, and an outlet a7 of a valve body of the check valve 352 is connected to the first pipe opening a1.

[0131] A second dry filter 351, whose two ends are respectively connected to the evaporator 33 and the second pipe opening a2.

[0132] When the refrigeration system 103 is in the refrigeration mode, since the check valve 352 is not turned on at this time, the refrigerant flowing from the condenser 32 flows to the evaporator 33 through the first dry filter 354, the first throttling device 353, and the second throttling device 355.

[0133] When the refrigeration system 103 is in the defrosting mode, the refrigerant flowing out of the evaporator 33 passes through the second drying filter 351 and flows to the first throttling device 353 or the second throttling device 355, and at the same time, passes through the first drying filter 354 and the one-way valve 352, and then flows to the condenser 32.

[0134] In the embodiment, when the refrigeration system 103 is in the defrosting mode, the refrigerant flows to the condenser 32 through two parallel branches, which is equivalent to increasing the pipe width (i.e. diameter), so that the flow of the refrigerant is larger, thereby improving the defrosting efficiency. When the refrigeration system 103 is in the refrigeration mode, the refrigerant only passes through one throttling device (i.e. the first throttling device 353), which reduces the pipe width relative to the defrosting mode, so that the flow of the refrigerant is smaller, thereby reducing the power consumption of the refrigerator.

[0135] In a possible implementation, the third connection port of the electromagnetic valve 34 is connected to the suction port of the compressor 31 through a first pipe, and a part of the first pipe is in contact with the first throttling device 353.

[0136] Figure 9 A structure diagram of a refrigeration system 103 provided by the embodiment is shown in FIG. 1. Figure 9 As shown in FIG. 1, the first pipe can be extended, so that a part of the pipe is in contact with the first throttling device 353, so that the cold energy of the pipe is conducted into the first throttling device 353, which can reduce the temperature of the refrigerant in the first throttling device 353, thereby improving the supercooling degree of the refrigerator, and due to the reuse of the cold energy of the refrigeration system 103, energy saving is achieved.

[0137] In a possible implementation, the part of the pipe can also be in contact with the second throttling device 355 and be arranged between the first throttling device 353 and the second throttling device 355.

[0138] Figure 10 A structure diagram of a refrigeration system 103 provided by the embodiment is shown in FIG. 1. Figure 10 As shown in FIG. 1, the first pipe can be extended, so that a part of the pipe is arranged between the first throttling device 353 and the second throttling device 355 and is in contact with the first throttling device 353 and the second throttling device 355. The cold energy of the pipe is conducted into the first throttling device 353 and the second throttling device 355, which can reduce the temperature of the refrigerant in the first throttling device 353 and the second throttling device 355, thereby improving the supercooling degree of the refrigerator, and due to the reuse of the cold energy of the refrigeration system 103, energy saving is achieved.

[0139] In a possible implementation, Figure 11 A structure diagram of a refrigeration system 103 provided by the embodiment is shown in FIG. 1. Figure 11As shown, the flow control assembly 35 further comprises a switching valve 356, a first drying filter 354 and a second drying filter 351. The switching valve 356 comprises an inlet a3, a first outlet a4 and a second outlet a5.

[0140] The first drying filter 354 is connected with the condenser 32 and the inlet a3 of the switching valve 356 respectively. The first outlet a4 is connected with the first throttling device 353, and the second outlet a5 is connected with the second throttling device 355. The first end of the second drying filter 351 is connected with the evaporator 33, and the second end of the second drying filter 351 is connected with the first throttling device 353 and the second throttling device 355 respectively.

[0141] The switching valve 356 is configured to:

[0142] When the refrigeration system 103 is in the refrigeration mode, the inlet a3 and the first outlet a4 are controlled to be communicated, and the refrigerant flowing out of the condenser 32 flows to the second drying filter 351 through the first drying filter 354 and the first throttling device 353, and then flows to the evaporator 33. Alternatively, the inlet a3 and the second outlet a5 are controlled to be communicated, and the refrigerant flowing out of the first drying filter 354 flows to the second drying filter 351 through the second throttling device 355.

[0143] When the refrigeration system 103 is in the defrosting mode, the inlet a3 is controlled to be communicated with the first outlet a4 and the second outlet a5, and the refrigerant flowing out of the second drying filter 351 flows to the first drying filter 354 through the first throttling device 353 and the second throttling device 355, and then flows to the condenser 32.

[0144] That is, when the refrigeration system 103 is in the refrigeration mode, since the switching valve 356 only guides the first outlet a4, the refrigerant flowing out of the condenser 32 flows to the first throttling device 353 through the first drying filter 354, and then flows to the second drying filter 351 and the evaporator 33. When the refrigeration system 103 is in the defrosting mode, the refrigerant flowing out of the evaporator 33 flows to the first throttling device 353 or the second throttling device 355 through the second drying filter 351 respectively, and then flows to the first drying filter 354 and the condenser 32.

[0145] In the embodiment, when the refrigeration system 103 is in the defrosting mode, the refrigerant flows to the condenser 32 through the two parallel first throttling device 353 and the second throttling device 355, which is equivalent to increasing the pipe width (i.e. diameter), so that the flow of the refrigerant is larger, thereby improving the defrosting efficiency. When the refrigeration system 103 is in the refrigeration mode, the refrigerant only flows through one throttling device (i.e. the first throttling device 353 or the second throttling device 355), which reduces the pipe width relative to the defrosting mode, so that the flow of the refrigerant is smaller, thereby reducing the power consumption of the refrigerator.

[0146] In a possible implementation, the control component 104 may control the switching valve 356 to move to a corresponding position according to the current working mode of the refrigeration system 103 to switch the refrigerant flow direction.

[0147] In one possible implementation, Figures 8 to 11 In the refrigeration system, the flow rate of the first throttling device 353 can be smaller than the flow rate of the second throttling device 355. By setting the flow rate of the first throttling device 353 to be smaller than the flow rate of the second throttling device 355, the flow rate of the refrigerant in the cooling mode can be further reduced, thereby saving energy consumption.

[0148] In a possible implementation, the first throttling device 353 and the second throttling device 355 may be capillaries.

[0149] In the embodiment of the present application, 1 in the figure represents the first end, and 2 represents the second end. Taking the first throttling device 353 as an example, 1 of the first throttling device 353 represents the first end of the first throttling device 353, and 2 of the first throttling device 353 represents the second end of the first throttling device 353. The rest are similar and will not be repeated here.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0151] For ease of explanation, the above description has been presented in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations are possible. The above embodiments have been selected and described to better explain the principles and practical applications, thereby enabling those skilled in the art to better utilize the embodiments and various variations of the embodiments suitable for specific use considerations.

[0152] In this application, "and / or" is simply a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document indicates that the related objects are in an "or" relationship.

[0153] In the present application, "multiple" refers to two or more than two. The first, second, and the like appearing in the embodiments of the present application are only for the purpose of description and distinction of the description objects, and do not have the order, nor represent the special limitation of the number of devices in the embodiments of the present application, and cannot constitute any limitation on the embodiments of the present application. For example, the first threshold and the second threshold are only used to distinguish different thresholds, and do not represent the difference in size, priority or importance of the two thresholds.

[0154] In the present application, "example", "in some embodiments", "in another embodiment", and the like are used to represent an example, illustration or description. Any embodiment or design scheme described as "example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of the word example is intended to present the concept in a specific way.

[0155] In the present application, "of", "corresponding", "corresponding", "relevant" and the like can be used interchangeably. It should be pointed out that when the difference is not emphasized, the meaning expressed is consistent.

Claims

1. A refrigerator characterized by comprising: The application relates to a refrigeration system, comprising: a box body; a refrigeration system arranged in the box body, comprising a compressor, a condenser, an evaporator and a flow control assembly; wherein the compressor is in communication with the condenser and the evaporator respectively, and an electromagnetic valve is arranged between the compressor and the condenser and the evaporator; when the refrigeration system is in a defrosting mode, the electromagnetic valve enables the compressor to communicate with the condenser, and refrigerant flowing out of the compressor flows to the evaporator through the condenser; when the refrigeration system is in a refrigeration mode, the electromagnetic valve enables the compressor to communicate with the evaporator, and refrigerant flowing out of the compressor flows to the evaporator; a first pipe opening of the flow control assembly is connected with the condenser, a second pipe opening of the flow control assembly is connected with the evaporator, and the flow control assembly is configured to: when the refrigeration system is in the refrigeration mode, control the refrigerant to flow into the flow control assembly from the first pipe opening, flow out of the second pipe opening, and the flow rate of the refrigerant flowing out of the second pipe opening is a first flow rate; when the refrigeration system is in the defrosting mode, control the refrigerant to flow into the flow control assembly from the second pipe opening, flow out of the first pipe opening, and the flow rate of the refrigerant flowing out of the first pipe opening is a second flow rate; wherein the first flow rate is less than the second flow rate.

2. The refrigerator according to claim 1, characterized in that, The flow control assembly comprises a first branch, a second branch, a second drying filter and a one-way valve; wherein a first throttling device and a first drying filter are arranged on the first branch; a second throttling device is arranged on the second branch; two ends of the first drying filter are connected with the first pipe opening and a first end of the first throttling device respectively, a second end of the first throttling device is connected with a first end of the second throttling device, and a second end of the second throttling device is connected with the evaporator through the second drying filter; an inlet of the one-way valve is connected with the second end of the second throttling device, and an outlet of the one-way valve is connected with the first end of the second throttling device.

3. The refrigerator according to claim 2, characterized in that, The electromagnetic valve comprises a first connecting port, a second connecting port, a third connecting port and a fourth connecting port; wherein the first connecting port is connected with an exhaust port of the compressor; the second connecting port is connected with the condenser; the third connecting port is connected with an air inlet of the compressor through a first pipeline; and the fourth connecting port is connected with the evaporator; part of the first pipeline is arranged in close contact with the first throttling device and the second throttling device.

4. The refrigerator according to claim 2 or 3, characterized in that, The flow rate of the first throttling device is greater than the flow rate of the second throttling device.

5. The refrigerator according to claim 1, characterized in that, The flow control assembly comprises a first throttling device and a second throttling device; the flow control assembly is configured to: when the refrigeration system is in the refrigeration mode, turn on a target throttling device, and enable refrigerant flowing out of the condenser to flow to the evaporator through the target throttling device; the target throttling device is the first throttling device or the second throttling device; When the refrigeration system is in the defrosting mode, the first throttling device and the second throttling device are turned on, and the refrigerant flowing out of the condenser flows to the evaporator through the first throttling device and the second throttling device.

6. The refrigerator according to claim 5, characterized in that, The flow control assembly comprises: A first branch provided with a first throttling device and a first drying filter; two ends of the first drying filter are connected with the first port and a first end of the first throttling device respectively, and a second end of the first throttling device is connected with the second port; A second branch provided in parallel with the first branch and provided with a second throttling device and a check valve; two ends of the second throttling device are connected with the second port and an inlet of the check valve respectively, and an outlet of the check valve is connected with the first port; A second drying filter, two ends of which are connected with the evaporator and the second port respectively.

7. The refrigerator according to claim 6, characterized in that The electromagnetic valve comprises a first connecting port, a second connecting port, a third connecting port and a fourth connecting port; The first connecting port is connected with an exhaust port of the compressor; the second connecting port is connected with the condenser; the third connecting port is connected with an inlet port of the compressor through a first pipeline; and the fourth connecting port is connected with the evaporator; Part of the first pipeline is arranged in close contact with the first throttling device.

8. The refrigerator according to claim 7, characterized in that, Part of the pipeline is arranged in close contact with the second throttling device and between the first throttling device and the second throttling device.

9. The refrigerator according to claim 5, characterized in that, The flow control assembly further comprises a switching valve, a first drying filter and a second drying filter; wherein the switching valve comprises an inlet, a first outlet and a second outlet; Two ends of the first drying filter are connected with the condenser and the inlet of the switching valve respectively; the first outlet is connected with the first throttling device, and the second outlet is connected with the second throttling device; a first end of the second drying filter is connected with the evaporator, and a second end of the second drying filter is connected with the first throttling device and the second throttling device respectively; The switching valve is configured to: When the refrigeration system is in the refrigeration mode, the inlet and the first outlet are controlled to be communicated, the refrigerant flowing out of the first drying filter flows to the second drying filter through the first throttling device, or the inlet and the second outlet are controlled to be communicated, and the refrigerant flowing out of the first drying filter flows to the second drying filter through the second throttling device; When the refrigeration system is in the defrosting mode, the inlet is controlled to be communicated with the first outlet and the second outlet, and the refrigerant flowing out of the second drying filter flows to the first drying filter through the first throttling device and the second throttling device.

10. The refrigerator according to claim 5, characterized in that, The flow of the first throttling device is smaller than the flow of the second throttling device.

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