Refrigerator

Abstract

A refrigerator (10). The refrigerator (10) comprises a refrigerator body (101) and a refrigerating system (103) arranged in the refrigerator body (101). The refrigerating system (103) comprises a compressor (31), a condenser (32), an evaporator (33), and a flow control assembly (35), wherein a first pipe port (a1) of the flow control assembly (35) is connected to the condenser (32), a second pipe port (a2) of the flow control assembly (35) is connected to the evaporator (33), and the flow control assembly (35) is configured such that: when the refrigerating system (103) is in a refrigerating mode, a refrigerant enters the flow control assembly (35) from the first pipe port (a1) and flows out from the second pipe port (a2), and the flow of the refrigerant flowing out from the second pipe port (a2) is a first flow; and when the refrigerating system (103) is in a defrosting mode, the refrigerant enters the flow control assembly (35) from the second pipe port (a2) and flows out from the first pipe port (a1), and the flow of the refrigerant flowing out from the first pipe port (a1) is a second flow, wherein the first flow is less than the second flow.

Description

Refrigerator

[0001] Cross Reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 2024104716175, filed on April 18, 2024, and Chinese Patent Application No. 2024106051763, filed on May 15, 2024, the contents of all of the above-mentioned Chinese patent applications are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of household appliances. More particularly, it relates to a refrigerator. BACKGROUND

[0004] When the air-cooled refrigerator is in the refrigeration mode, frost will form on the surface of the finned evaporator when the surface temperature of the finned evaporator is lower than the dew point temperature of the air and lower than 0℃. As the frost layer becomes thicker, defrosting needs to be performed to avoid the finned evaporator being blocked by frost, which reduces the heat exchange efficiency and causes the temperature of the compartment to rise.

[0005] 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 used 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 of this method is low. SUMMARY

[0006] Some embodiments of the present application provide a refrigerator, comprising:

[0007] a cabinet;

[0008] a refrigeration system arranged in the cabinet, comprising:

[0009] a compressor;

[0010] a condenser in communication with the compressor;

[0011] an evaporator in communication with the compressor;

[0012] An electromagnetic valve is arranged between the compressor and the condenser and the evaporator, wherein when the refrigeration system is in the defrosting mode, the electromagnetic valve makes the compressor communicate 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 communicate with the evaporator, and the refrigerant flowing out of the compressor flows to the evaporator.

[0013] In some embodiments of the present application, the refrigerator further comprises a flow control assembly, a first port of which is connected with the condenser, and a second port of which is connected with the evaporator, and the flow control assembly is configured to:

[0014] When the refrigeration system is in the refrigeration mode, the flow of the refrigerant from the first port into the flow control assembly, from the second port and from the second port is controlled, and the flow of the refrigerant from the second port is a first flow;

[0015] When the refrigeration system is in the defrosting mode, the flow of the refrigerant from the second port into the flow control assembly, from the first port and from the second port is controlled, and the flow of the refrigerant from the first port is a second flow;

[0016] Wherein the first flow is less than the second flow.

[0017] In some embodiments of the present application, the flow control assembly comprises:

[0018] A first branch is provided with a first throttling device and a first dry filter;

[0019] A second branch is provided with a second throttling device; and

[0020] A one-way valve, an inlet of which is connected with a second end of the second throttling device, and an outlet of which is connected with a first end of the second throttling device;

[0021] Wherein two ends of the first dry filter are connected with the first port 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 dry filter.

[0022] In some embodiments of the present application, the electromagnetic valve comprises:

[0023] A first connecting port is connected with an exhaust port of the compressor;

[0024] A second connecting port is connected with the condenser;

[0025] A third connecting port is connected with an inlet port of the compressor through a first pipeline.

[0026] The fourth connecting port is connected with the evaporator.

[0027] Part of the first pipeline is arranged in contact with the first throttling device and the second throttling device.

[0028] 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.

[0029] In some embodiments of the present application, the flow control assembly comprises a first throttling device and a second throttling device.

[0030] The flow control assembly is configured to:

[0031] When the refrigeration system is in a refrigeration mode, a 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.

[0032] When the refrigeration system is in a 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.

[0033] In some embodiments of the present application, the flow control assembly comprises:

[0034] The first branch is provided with a first throttling device and a first dry filter; two ends of the first dry filter are respectively connected with the first pipe port and a first end of the first throttling device, and a second end of the first throttling device is connected with the second pipe port.

[0035] The second branch is provided in parallel with the first branch and is provided with a second throttling device and a check valve; two ends of the second throttling device are respectively connected with the second pipe port and an inlet of the check valve, and an outlet of the check valve is connected with the first pipe port.

[0036] The second dry filter is connected with the evaporator and the second pipe port at two ends thereof.

[0037] In some embodiments of the present application, the electromagnetic valve comprises:

[0038] The first connecting port is connected with an exhaust port of the compressor.

[0039] The second connecting port is connected with the condenser.

[0040] The third connecting port is connected with an air inlet of the compressor through the first pipeline; and

[0041] A fourth connecting port is connected to the evaporator.

[0042] Part of the first pipeline is arranged in contact with the first throttling device.

[0043] In some embodiments of the present application, the part of the pipeline is arranged in contact with the second throttling device and between the first throttling device and the second throttling device.

[0044] In some embodiments of the present application, the flow control assembly further comprises:

[0045] A switching valve comprising an inlet, a first outlet and a second outlet;

[0046] A first drying filter having two ends connected to the condenser and the inlet of the switching valve respectively; the first outlet of the switching valve is connected to the first throttling device, and the second outlet of the switching valve is connected to the second throttling device;

[0047] A second drying filter having a first end connected to the evaporator and a second end connected to the first throttling device and the second throttling device respectively;

[0048] The switching valve is configured to:

[0049] When the refrigeration system is in a refrigeration mode, the inlet and the first outlet are controlled to be in communication, and 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 in communication, and the refrigerant flowing out of the first drying filter flows to the second drying filter through the second throttling device.

[0050] When the refrigeration system is in a defrosting mode, the inlet is controlled to be in communication 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.

[0051] In some embodiments of the present application, the flow rate of the first throttling device is less than the flow rate of the second throttling device.

[0052] Some embodiments of the present application provide a refrigerator comprising:

[0053] A cabinet;

[0054] A refrigeration system arranged in the cabinet and comprising:

[0055] A compressor;

[0056] A condenser in communication with the compressor;

[0057] An evaporator in communication with the compressor;

[0058] a solenoid valve disposed between the compressor and the condenser and the evaporator;

[0059] a throttling device disposed between the condenser and the evaporator;

[0060] wherein the first dry filter and the second dry filter are disposed on two sides of the throttling device;

[0061] when the refrigeration system is in the refrigeration mode, the solenoid valve allows the compressor to communicate with the condenser, and the refrigerant flowing out of the compressor passes through the condenser, the throttling device, and flows to the evaporator;

[0062] when the refrigeration system is in the defrosting mode, the solenoid valve allows the compressor to communicate with the evaporator, and the refrigerant flowing out of the compressor passes through the evaporator, the throttling device, and flows to the condenser.

[0063] In some embodiments of the present application, the refrigerator further comprises:

[0064] a first dry filter disposed between the condenser and the evaporator;

[0065] a second dry filter disposed between the condenser and the evaporator;

[0066] wherein the first dry filter and the second dry filter are disposed on two sides of the throttling device;

[0067] when the refrigeration system is in the refrigeration mode, the refrigerant flowing out of the compressor also passes through the first dry filter and the second dry filter;

[0068] when the refrigeration system is in the defrosting mode, the refrigerant flowing out of the compressor also passes through the second dry filter and the first dry filter.

[0069] In some embodiments of the present application, the refrigerator further comprises:

[0070] a first housing having a first accommodating cavity, and provided with a first port, a second port, a third port and a fourth port in communication with the first accommodating cavity;

[0071] The first sub-receiving cavity and the second sub-receiving cavity are symmetrically arranged in the depth direction.

[0072] The first dry filter is arranged in the first sub-receiving cavity.

[0073] In some embodiments of the present application, the first sub-receiving cavity and the second sub-receiving cavity are symmetrically arranged in the depth direction.

[0074] In some embodiments, the refrigerator further comprises:

[0075] The second housing has a second receiving cavity, and is provided with a first port and a third port in communication with the second receiving cavity.

[0076] The third housing has a third receiving cavity, and is provided with a second port and a fourth port in communication with the third receiving cavity.

[0077] The first port is in communication with the condenser, and the second port is in communication with the evaporator.

[0078] The first dry filter is arranged in the second receiving cavity, and the second dry filter is arranged in the third receiving cavity.

[0079] In some embodiments of the present application, the first dry filter comprises:

[0080] The first filter screen is fixedly arranged in the first sub-receiving cavity and close to the first port.

[0081] The second filter screen is fixedly arranged in the first sub-receiving cavity and close to the partition.

[0082] The first desiccant is filled between the first filter screen and the second filter screen.

[0083] The second dry filter comprises:

[0084] The third filter screen is fixedly arranged in the second sub-receiving cavity and close to the second port.

[0085] The fourth filter screen is fixedly arranged in the second sub-receiving cavity and close to the partition.

[0086] a second drying agent filled between the third filter screen and the fourth filter screen.

[0087] In some embodiments of the present application, the first filter screen, the second filter screen, the third filter screen and the fourth filter screen are conical.

[0088] The first filter screen is arranged with its top facing the first port, and the second filter screen is arranged with its top facing the first port; the third filter screen is arranged with its top facing the second port, and the fourth filter screen is arranged with its top facing the second port.

[0089] In some embodiments of the present application, the first filter screen has a larger pore size than the second filter screen; and the fourth filter screen has a larger pore size than the third filter screen.

[0090] In some embodiments of the present application, the partition is provided with a first channel and a second channel, the first channel being used to connect the first sub- containing cavity and the third port; and the second channel being used to connect the second sub-containing cavity and the fourth port.

[0091] In some embodiments of the present application, the partition is a partition plate, the third port is arranged on one side close to the partition plate, and the fourth port is arranged on the other side close to the partition plate.

[0092] Some embodiments of the present application provide a refrigerator, comprising:

[0093] a cabinet;

[0094] a refrigeration system arranged in the cabinet, and comprising:

[0095] a compressor;

[0096] a condenser in communication with the compressor;

[0097] an evaporator in communication with the compressor;

[0098] a solenoid valve arranged between the compressor and the condenser and the evaporator;

[0099] a throttling device arranged between the condenser and the evaporator;

[0100] When the refrigeration system is in a refrigeration mode, the solenoid valve allows the compressor to communicate with the condenser, and the refrigerant flowing out of the compressor flows through the condenser and the throttling device to the evaporator.

[0101] When the refrigeration system is in the defrosting mode, the electromagnetic valve enables the compressor to communicate with the evaporator, and the refrigerant flowing out of the compressor passes through the evaporator, the throttling device, and flows to the condenser.

[0102] In some embodiments of the present application, the refrigeration system further comprises a drying and filtering device arranged between the condenser and the evaporator.

[0103] When the refrigeration system is in the refrigeration mode, the refrigerant flowing out of the compressor further passes through the drying and filtering device.

[0104] When the refrigeration system is in the defrosting mode, the refrigerant flowing out of the compressor further passes through the drying and filtering device. BRIEF DESCRIPTION OF DRAWINGS

[0105] In order to more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the drawings required to be used in the embodiment or related art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0106] FIG. 1 is a schematic view of a refrigerator according to some embodiments of the present application;

[0107] FIG. 2 is a structural schematic view of a refrigerator according to some embodiments of the present application;

[0108] FIG. 3 is a schematic view of the flow direction of refrigerant when the refrigeration system 103 is in the refrigeration mode according to some embodiments of the present application;

[0109] FIG. 4 is a schematic view of the flow direction of refrigerant when the refrigeration system 103 is in the defrosting mode according to some embodiments of the present application;

[0110] FIG. 5 is a structural schematic view of a refrigeration system 103 according to some embodiments of the present application;

[0111] FIG. 6 is a structural schematic view of a refrigeration system 103 according to some embodiments of the present application;

[0112] FIG. 7 is a structural schematic view of a refrigeration system 103 according to some embodiments of the present application;

[0113] FIG. 8 is a structural schematic view of a refrigeration system 103 according to some embodiments of the present application;

[0114] FIG. 9 is a structural schematic view of a refrigeration system 103 according to some embodiments of the present application;

[0115] FIG. 10 is a structural schematic view of a refrigeration system 103 according to some embodiments of the present application;

[0116] FIG. 11 is a schematic diagram of a structure of a refrigeration system 103 according to some embodiments of the present application;

[0117] FIG. 12 is a schematic diagram of a refrigeration system of a refrigerator according to some embodiments of the present application;

[0118] FIG. 13 is a schematic diagram of a refrigerator according to some embodiments of the present application;

[0119] FIG. 14 is a schematic diagram of a structure of a refrigeration system 103 according to some embodiments of the present application;

[0120] FIG. 15 is a schematic diagram of a flow direction of refrigerant when the refrigeration system 103 is in a refrigeration mode according to some embodiments of the present application;

[0121] FIG. 16 is a schematic diagram of a flow direction of refrigerant when the refrigeration system 103 is in a defrosting mode according to some embodiments of the present application;

[0122] FIG. 17 is a schematic diagram of a structure of a refrigeration system 103 according to some embodiments of the present application;

[0123] FIG. 18 is a schematic diagram of a structure of a refrigeration system 103 according to some embodiments of the present application;

[0124] FIG. 19 is a schematic diagram of a structure of a first drying filter and a second drying filter according to some embodiments of the present application;

[0125] FIG. 20 is a schematic diagram of a structure of a first drying filter and a second drying filter according to some embodiments of the present application;

[0126] FIG. 21 is a schematic diagram of a structure of a first drying filter and a second drying filter according to some embodiments of the present application;

[0127] FIG. 22 is a schematic diagram of a structure of a first drying filter and a second drying filter according to some embodiments of the present application;

[0128] FIG. 23 is a schematic diagram of a structure of a first drying filter and a second drying filter according to some embodiments of the present application;

[0129] FIG. 24 is a schematic diagram of a first filter screen 361 according to some embodiments of the present application;

[0130] FIG. 25 is a schematic diagram of a flow direction of refrigerant when the refrigeration system 103 is in a refrigeration mode and a defrosting mode according to some embodiments of the present application;

[0131] FIG. 26 is a schematic diagram of a structure of a first drying filter and a second drying filter according to some embodiments of the present application.

[0132] Reference numerals: 10-refrigerator; 11-refrigerating chamber; 101-box body; 102-door body; 103-refrigeration system; 104-control assembly; 31-compressor; 32-condenser; 33-evaporator; 34-solenoid valve; 35-flow control assembly; 351, 37-second dry filter; 352-one-way valve; 353-first throttling device; 354, 36-first dry filter; 355-second throttling device; 356-switching valve; 357-throttling device; 361-first filter screen; 362-first desiccant; 363-second filter screen; 371-third filter screen; 372-second desiccant; 373-fourth filter screen; 38-first housing; 39-second housing; 310-third housing; 381-first containing cavity; 391-second containing cavity; 3101-third containing cavity; 3811-first sub-containing cavity; 3812-second sub-containing cavity; 383-separator; a1-first pipe opening; a11-first port; a2-second pipe opening; a21-second port; a3-inlet; a31-third port; a4-first outlet; a41-fourth port; a5-second outlet; a6-inlet; a7-valve body outlet; b1-first connecting port; b2-second connecting port; b3-third connecting port; b4-fourth connecting port; P1-first channel; P2-second channel. DETAILED DESCRIPTION

[0133] In order to make the embodiments and advantages of the present application clearer, the following will be combined with the accompanying drawings of some example embodiments of the present application to clearly and completely describe some example embodiments of the present application. Obviously, the described example embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application.

[0134] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the following 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.

[0135] 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 not clearly listed or inherent to these products or devices.

[0136] 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 will become thicker and thicker, and defrosting treatment is needed to avoid frost blocking of the finned evaporator, resulting in reduced heat exchange efficiency, small air duct cross section, poor air circulation, and rising temperature in the chamber.

[0137] The evaporator of a high back pressure, high evaporator temperature refrigeration device such as an air conditioner can be defrosted by a heat pump defrosting method. Specifically, the heat pump defrosting refers to a process of removing ice and frost on the surface of the evaporator in the refrigeration device by using a heat pump technology. The high back pressure refers to a high pressure of the refrigerant in the condenser in the refrigeration cycle.

[0138] However, the refrigerator has the characteristics of low back pressure, low evaporator temperature and small refrigeration system, which is quite different from the design of the large refrigeration system with high back pressure. When the heat pump defrosting method is applied to the refrigerator, the heat exchange capacity ratio of the high pressure end heat exchanger and the low pressure end heat exchanger is different when the refrigerant flows forward and reversely. The low back pressure refers to a low pressure of the refrigerant in the condenser in the refrigeration cycle.

[0139] That is, the heat exchange capacity ratio of the high pressure end heat exchanger and the low pressure end heat exchanger of the refrigerator is determined according to the requirement of the refrigerant flowing forward. When the refrigerant flows reversely, the original high pressure end heat exchanger becomes the low pressure end heat exchanger, and the original low pressure end heat exchanger becomes the high pressure end heat exchanger. That is, the heat exchange capacity ratio changes, causing the heat exchange capacity ratio in the defrosting mode to be mismatched, resulting in a decrease in the heat exchange efficiency of the refrigeration system, and then the defrosting effect is poor. The low pressure end heat exchanger can be an evaporator, and the high pressure end heat exchanger can be a condenser.

[0140] If the heat exchange capacity ratio of the refrigeration system is adjusted, the refrigeration capacity of the original refrigeration system will decrease.

[0141] In order to improve the defrosting efficiency, the defrosting can be performed by combining the electric heating defrosting and the reverse flow defrosting. However, the heater body for the electric heating defrosting has a high temperature, and safety distance control, heat insulation protection and temperature fuse protection are required, which has certain safety hazards. In addition, the heat radiation is unbalanced in the defrosting process, part of the heat is overflowed, so that the heat for defrosting is less, and the heat utilization rate is low.

[0142] Some embodiments of the present application provide a refrigerator. A flow control component is arranged between the evaporator and the condenser. When the reverse flow defrosting is performed, the flow of the reverse flow refrigerant in the refrigeration system is increased by the flow control component, the heat transfer in the evaporator is increased, the melting speed of the frost on the surface is accelerated, and the defrosting efficiency is improved.

[0143] The technical solutions of the present application will be described in detail in combination with some embodiments. Some embodiments below can be combined with each other, or can exist independently. The same or similar concepts or processes can not be described in some embodiments. The embodiments of the present application will be described in combination with the drawings.

[0144] The specific structure of a refrigerator provided by some embodiments of the present application is described. For example, FIG. 1 is a schematic diagram of a refrigerator provided by some embodiments of the present application. As shown in FIG. 1, the refrigerator 10 includes a cabinet 101, a door body 102, and a storage chamber arranged in the cabinet 101.

[0145] In some embodiments, as shown in FIG. 1, the storage chamber includes a refrigeration chamber 11 and a freezing chamber, which is not shown in FIG. 1. It can be understood that FIG. 1 is only a schematic diagram of a refrigerator applicable to some embodiments of the present application, and the refrigerator can also be of other structures, which is not limited by the present application.

[0146] FIG. 2 is a structural schematic diagram of a refrigerator provided by some embodiments of the present application. In some embodiments, referring to FIG. 2, the refrigerator 10 further includes a refrigeration system 103 and a control assembly 104. The refrigeration system 103 and the control assembly 104 can be electrically connected.

[0147] As shown in FIG. 2, the refrigeration system 103 includes a compressor 31 configured to provide power for refrigeration of the refrigerator 10, a condenser 32 configured to dissipate heat of refrigerant from the compressor 31, and an evaporator 33 configured to provide cold quantity for the refrigeration chamber 11 and / or the freezing chamber.

[0148] 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.

[0149] In some embodiments, 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.

[0150] FIG. 3 is a schematic diagram of the flow direction of the refrigerant when the refrigeration system 103 is in the refrigeration mode according to some embodiments of the present application, and FIG. 4 is a schematic diagram of the flow direction of the refrigerant when the refrigeration system 103 is in the defrosting mode according to some embodiments of the present application.

[0151] In some embodiments, referring to FIG. 3 or FIG. 4, the electromagnetic valve 34 includes a first connection port b1, a second connection port b2, a third connection port b3, and a fourth connection port b4. The first connection port b1 is in communication with the exhaust port of the compressor 31, the second connection port b2 is in communication with the condenser 32, the third connection port b3 is in communication with the air inlet port of the compressor 31, and the fourth connection port b4 is in communication with the evaporator 33.

[0152] The control assembly 104 is configured to control the electromagnetic valve 34 to communicate the first connection port b1 with the second connection port b2 and the third connection port b3 with the fourth connection port b4 when the refrigeration system 103 is in the refrigeration mode, so that the refrigerant flowing out of the exhaust port of the compressor 31 flows to the condenser 32, then to the evaporator 33, and finally to the compressor 31 to complete the refrigeration cycle of the refrigerator; and to communicate the first connection port b1 with the fourth connection port b4 and the second connection port b2 with the third connection port b3 when the refrigeration system 103 is in the defrosting mode, so that 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.

[0153] In some embodiments, the electromagnetic valve 34 changes the internal structure of the valve body according to the control signal in different working modes, thereby realizing the control of the flow direction of the refrigerant. The electromagnetic valve 34 includes an electromagnetic coil and a valve core. When current passes through the coil, a magnetic field is generated to drive the valve core to move, thereby opening or closing the flow communication between the connection ports. The control assembly 104 controls the opening and closing of the electromagnetic valve 34 through electrical connection. The action of the electromagnetic valve is usually controlled by the electromagnetic coil. The control assembly 104 monitors the temperature of the refrigerating chamber and the freezing chamber in the cabinet in real time according to the temperature control requirement, and sends a corresponding control signal. The control signal can be transmitted in the form of analog voltage or digital pulse. In some embodiments, the control assembly 104 can be equipped with multiple sensors, such as temperature sensors, humidity sensors, pressure sensors, etc., to better control the operation of the refrigeration system.

[0154] For example, as shown in FIG. 3, 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 normal-temperature, high-pressure saturated vapor is throttled and depressurized to become a normal-temperature, low-pressure wet vapor through the throttling device between the condenser 32 and the evaporator 33. Subsequently, the normal-temperature, low-pressure wet vapor absorbs heat to vaporize in the evaporator 33, 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 low-temperature, low-pressure gas passes through the compressor 31 again to complete the refrigeration cycle of the refrigerator.

[0155] For example, as shown in FIG. 4, 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 flows to the evaporator 33 to defrost the evaporator 33, and then enters the condenser 32 through the throttling device between the condenser 32 and the evaporator 33 to evaporate, and returns to the compressor 31. In the evaporator 33, the high-temperature, high-pressure refrigerant can melt the ice and frost condensed on the evaporator 33 by heat conduction to achieve defrosting.

[0156] In some embodiments, FIG. 5 is a structural schematic diagram of a refrigeration system 103 according to some embodiments of the present application. As shown in FIG. 5, the refrigeration system 103 further comprises a flow control assembly 35. The flow control assembly 35 is provided with two outlets: a first pipe opening a1 and a second pipe opening a2. The first pipe opening a1 of the flow control assembly 35 is connected with the condenser 32, and the second pipe opening a2 of the flow control assembly 35 is connected with the evaporator 33. The flow control assembly 35 is configured to: when the refrigeration system 103 is in a refrigeration mode, control the refrigerant to flow into the flow control assembly from the first pipe opening a1 and flow out of the second pipe opening a2, and the flow rate of the refrigerant flowing out of the second pipe opening a2 is a first flow rate; when the refrigeration system 103 is in a defrosting mode, control the refrigerant to flow into the flow control assembly from the second pipe opening a2 and flow out of the first pipe opening a1, and the flow rate of the refrigerant flowing out of the first pipe opening a1 is a second flow rate. The first flow rate is less than the second flow rate.

[0157] In some embodiments, the flow control assembly 35 can be used to achieve a larger flow rate of the refrigerant in the defrosting mode than in the refrigeration mode, thereby improving the defrosting efficiency. In some embodiments, 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.) provided in a refrigerator. Since the heat exchange amount required by the refrigeration system 103 is smaller 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, thereby reducing the system load and the work, and thus reducing the power consumption.

[0158] In some embodiments, FIG. 6 is a structural schematic diagram of a refrigeration system 103 according to some embodiments of the present application. As shown in FIG. 6, the flow control assembly 35 comprises:

[0159] a first branch provided with a first throttling device 353 and a first dry filter 354;

[0160] a second branch provided with a second throttling device 355;

[0161] the first dry filter 354, whose two ends are respectively connected with the first pipe opening a1 and the first end of the first throttling device 353, the second end of the first throttling device 353 is connected with the first end of the second throttling device 355, and the second end of the second throttling device 355 is connected with the evaporator 33 through the second dry filter 351.

[0162] the one-way valve 352, whose inlet a6 is connected with the second end of the second throttling device 355, and the valve body outlet a7 of the one-way valve 352 is connected with the first end of the second throttling device 355.

[0163] When the refrigeration system 103 is in the refrigeration mode, the refrigerant flowing out of the condenser 32 passes through the first drying filter 354, the first throttling device 353, the second throttling device 355, and the second drying filter 351 to the evaporator 33. 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, the one-way valve 352, the first throttling device 353, the first drying filter 354, and the condenser 32.

[0164] It can be understood that, due to the flow rate of the pipeline where the one-way valve 352 is located being much larger than that 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, from the second drying filter 351 to the one-way valve 352.

[0165] In some embodiments, the first throttling device 353 is used to control the flow rate of the refrigerant, limit the flow rate, and thus adjust the amount of refrigerant passing through. In the refrigeration mode, it controls the flow rate of the refrigerant to ensure that the heat exchange effect of the system is moderate; and in the defrosting mode, its role can also adjust the flow rate to increase the flow rate of the refrigerant to improve the defrosting efficiency. The first drying filter 354 is used to remove water and impurities in the refrigerant to prevent these impurities from affecting the normal operation of the system and avoid icing or corrosion of the equipment. The second throttling device 355 is used to further adjust the flow rate, and in the defrosting mode, increase the flow rate to improve the defrosting efficiency; and in the refrigeration mode, reduce the flow rate to save energy and improve the stability of the system. The second drying filter 351 is similar to the first drying filter and is also used to filter impurities and water in the refrigerant.

[0166] In some embodiments, when the refrigeration system 103 is in the defrosting mode, the refrigerant passes through the first throttling device 353 but not the second throttling device 355, and the resistance is small, so that the flow rate of the refrigerant passing 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 passing through is small, thereby reducing the power consumption of the refrigerator.

[0167] In some embodiments, 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.

[0168] Figure 7 is a structural schematic diagram of a refrigeration system 103 according to some embodiments of the present application. As shown in Figure 7, the first pipe can be extended so that part of the pipe can be in contact with the first throttling device 353 and the second throttling device 355, so that the cold energy of the pipe can be 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 increasing the supercooling degree of the refrigerator, and due to the reuse of the cold energy of the refrigeration system 103, energy saving can be achieved. It can be understood that the supercooling degree of the refrigerator is increased by this method, and the increase is small, which will not cause excessive freezing or icing of food, thereby affecting the taste and quality of the food.

[0169] In some embodiments, 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.

[0170] Next, another refrigeration system according to some embodiments of the present application is described.

[0171] In some embodiments, the flow control assembly 35 includes a first throttling device 353 and a second throttling device 355. The flow control assembly 35 is configured to: when the refrigeration system 103 is in a refrigeration mode, turn on a target throttling device, 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; when the refrigeration system 103 is in a defrosting mode, turn on the first throttling device 353 or the second throttling device 355, 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.

[0172] In some embodiments, the first throttling device 353 or the second throttling device 355 can be arranged in parallel, so that in the refrigeration mode, one throttling device is opened to reduce the flow rate of the refrigerant. In the defrosting mode, two throttling devices are opened, which can increase the flow rate of the refrigerant, thereby improving the defrosting efficiency.

[0173] In some embodiments, Figure 8 is a structural schematic diagram of a refrigeration system 103 according to some embodiments of the present application. As shown in Figure 8, the flow control assembly 35 includes:

[0174] 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;

[0175] A second branch is arranged in parallel with the first branch, and a second throttling device 355 and a one-way valve 352 are arranged on the second branch. Two ends of the second throttling device 355 are connected with the second pipe opening a2 and an inlet a6 of the one-way valve 352 respectively, and an outlet a7 of a valve body of the one-way valve 352 is connected with the first pipe opening a1;

[0176] A second dry filter 351 is arranged at two ends of the evaporator 33 and the second pipe opening a2 respectively.

[0177] When the refrigeration system 103 is in the refrigeration mode, the refrigerant flowing out of the condenser 32 passes through the first dry filter 354, the first throttling device 353, the second throttling device 355, and the evaporator 33 in sequence; 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, the first throttling device 353 or the second throttling device 355, the first dry filter 354, and the one-way valve 352 in sequence, and then flows to the condenser 32.

[0178] In some embodiments, 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 rate of the refrigerant is relatively large, thereby improving the defrosting efficiency. When the refrigeration system 103 is in the refrigeration mode, the refrigerant passes through one throttling device (i.e. the first throttling device 353), which is equivalent to reducing the pipe width, so that the flow rate of the refrigerant is relatively small, thereby reducing the power consumption of the refrigerator.

[0179] In some embodiments, the third connection port of the electromagnetic valve 34 is connected with 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.

[0180] FIG. 9 is a structural schematic diagram of a refrigeration system 103 according to some embodiments of the present application. As shown in FIG. 9, the first pipe can be extended, so that a part of the first pipe is in contact with the first throttling device 353, so that the cold energy of the pipe is conducted to 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 the cold energy of the refrigeration system 103 is reused, thereby achieving energy saving. In some embodiments, the part of the first pipe can also be in contact with the second throttling device 355, and is arranged between the first throttling device 353 and the second throttling device 355.

[0181] FIG. 10 is a structural schematic diagram of a refrigeration system 103 according to some embodiments of the present application. As shown in FIG. 10, the first pipeline can be extended so that part of the pipeline is arranged between and attached to the first throttling device 353 and the second throttling device 355. The cold energy of the pipeline 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 increasing the supercooling degree of the refrigerator, and achieving energy saving due to the reuse of the cold energy of the refrigeration system 103.

[0182] In some embodiments, FIG. 11 is a structural schematic diagram of a refrigeration system 103 according to some embodiments of the present application. As shown in FIG. 11, the flow control assembly 35 further comprises:

[0183] a switching valve 356, comprising an inlet a3, a first outlet a4 and a second outlet a5;

[0184] a first dry filter 354, connected to the condenser 32 and the inlet a3 of the switching valve 356 respectively; the first outlet a4 is connected to the first throttling device 353, and the second outlet a5 is connected to the second throttling device 355;

[0185] a second dry filter 351, the first end of which is connected to the evaporator 33, and the second end of which is connected to the first throttling device 353 and the second throttling device 355 respectively.

[0186] The switching valve 356 is configured to: when the refrigeration system 103 is in a refrigeration mode, control the inlet a3 and the first outlet a4 to be communicated, so that the refrigerant flowing out of the condenser 32 flows to the second dry filter 351 through the first dry 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, so that the refrigerant flowing out of the first dry filter 354 flows to the second dry filter 351 through the second throttling device 355. When the refrigeration system 103 is in a defrosting mode, the inlet a3 is controlled to be communicated with the first outlet a4 and the second outlet a5, so that the refrigerant flowing out of the second dry filter 351 flows to the first dry filter 354 through the first throttling device 353 and the second throttling device 355, and then flows to the condenser 32.

[0187] That is, when the refrigeration system 103 is in the cooling mode, since the switching valve 356 only opens the first outlet a4, the refrigerant flowing out of the condenser 32 flows through the first drying filter 354 to the first throttling device 353, and then flows through the second drying filter 351 to the evaporator 33. When the refrigeration system 103 is in the defrosting mode, the refrigerant flowing out of the evaporator 33 flows through the second drying filter 351 to the first throttling device 353 or the second throttling device 355, and then flows through the first drying filter 354 to the condenser 32.

[0188] In some embodiments, when the refrigeration system 103 is in the defrosting mode, the refrigerant flows through both the first throttling device 353 and the second throttling device 355 to the condenser 32, which is equivalent to increasing the pipe width (i.e., diameter), so that the flow rate of the refrigerant is relatively large, thereby improving the defrosting efficiency. When the refrigeration system 103 is in the cooling mode, the refrigerant only flows through one throttling device (i.e., the first throttling device 353 or the second throttling device 355), which is equivalent to reducing the pipe width relative to the defrosting mode, so that the flow rate of the refrigerant is relatively small, thereby reducing the power consumption of the refrigerator.

[0189] In some embodiments, the control component 104 can control the valve of the switching valve 356 to move to the corresponding position according to the current working mode of the refrigeration system 103, so as to switch the flow direction of the refrigerant.

[0190] In some embodiments, the first throttling device 353 can be designed by a throttling hole or a valve to adjust the flow rate of the refrigerant. The design of the device can control the flow rate of the refrigerant according to the requirements of the cooling mode and the defrosting mode. The size of the throttling hole or the opening of the valve can be adjusted as needed. The second throttling device 355 can be similar to the first throttling device 353, and can be designed by a throttling hole or a valve to adjust the flow rate. The difference between the two mainly lies in the range and accuracy of the flow rate adjustment. To support the large flow rate requirement in the defrosting mode, the second throttling device 355 can be integrated with an additional flow rate adjustment valve or valve mechanism to provide a larger flow rate through a larger-diameter throttling hole.

[0191] In some embodiments, in the refrigeration system of FIGS. 8 and 11, the flow rate of the first throttling device 353 can be smaller than that of the second throttling device 355. By setting the flow rate of the first throttling device 353 to be smaller than that of the second throttling device 355, the flow rate of the refrigerant in the cooling mode can be further reduced, thereby saving energy consumption. In some embodiments, the first throttling device 353 and the second throttling device 355 can be capillary tubes.

[0192] In some embodiments of the present application, 1 in the figure represents the first end, 2 represents the second end, and 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, and the others are similar, which will not be repeated here.

[0193] In some of the foregoing embodiments, the refrigeration system realizes the forward refrigeration and reverse defrosting functions of a single-system refrigerator through a four-way reversing valve. Although this design can meet the basic requirements in most cases, for some extreme working conditions, a single reverse flow cycle still cannot effectively improve the flow direction of refrigeration and defrosting, and may even cause the defrosting function to fail. To solve this problem, the system re-designs the throttling components to adjust the heat exchanger matching in refrigeration and defrosting modes, thereby realizing efficient use of condensation heat and achieving energy-saving effects. With the continuous advancement of technology, especially in the field of household refrigerators and freezers, reverse defrosting and other functions are gradually introduced, which puts higher requirements on the refrigeration system. In the following embodiments, a design scheme is proposed for small-sized refrigeration equipment, especially for the application of bidirectional dry filter and bidirectional throttling function. This new design solves the ice blockage and dirt blockage problems of the unidirectional dry filter and throttling device in bidirectional circulation, improves the reliability of the system and simplifies the installation process. Unlike the foregoing embodiments, the present embodiment not only improves the adaptability of the system, but also provides a better and efficient solution for household refrigeration products, fully meeting the needs of household products in reverse cycle defrosting and other aspects.

[0194] In the refrigeration process of an 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 form on the surface of the evaporator. With the passage of time, the frost layer will become thicker and thicker, and defrosting treatment is needed to avoid frost blockage of the finned evaporator, which leads to a decrease in heat exchange efficiency, a small air duct cross section, and poor air circulation, resulting in an increase in the temperature of the compartment.

[0195] Currently, defrosting can be achieved by reversing the flow of refrigerant. Specifically, the refrigerant is reversed in each mechanism in the refrigeration system, and the high-temperature, high-pressure gas flowing out of the compressor enters the evaporator to defrost the evaporator using the heat of the high-temperature, high-pressure gas.

[0196] Figure 12 is a schematic diagram of a refrigeration system of a refrigerator according to some embodiments of the present application. As shown in Figure 12, during normal refrigeration, the high-temperature exhaust gas of the compressor is first cooled by the condenser, then filtered by the dry filter to remove impurities and absorb moisture, and then enters the throttling device for throttling and pressure reduction. The refrigerant after pressure reduction enters the evaporator for refrigeration.

[0197] However, when the refrigerant flows reversely to defrost, the exhaust gas of the compressor directly enters the throttling device through the evaporator, and the throttling device is prone to blockage during the reverse flow process without impurity filtration and moisture absorption, thereby causing failure and affecting the operation of the refrigeration system, and the reliability is reduced.

[0198] Therefore, some embodiments of the present application provide a refrigerator, which is provided with drying and filtering structures on both sides of the throttling device, and the refrigerant flows forward and reversely through the throttling device and the filter dryer, so that the throttling device is prevented from being blocked during the reverse flow process without impurity filtration and moisture absorption, thereby affecting the operation of the refrigeration system and improving the reliability.

[0199] The specific structure of the refrigerator provided by some embodiments of the present application is described. For example, FIG. 13 is a schematic diagram of a refrigerator provided by some embodiments of the present application. As shown in FIG. 13, the refrigerator 10 includes a cabinet 101, a door body 102, and a storage compartment provided in the cabinet 101.

[0200] In some embodiments, as shown in FIG. 13, the storage compartment includes a refrigeration compartment 11 and a freezing compartment, which is not shown in FIG. 13.

[0201] It can be understood that FIG. 13 is only a schematic diagram of a refrigerator applicable to the present application, and the refrigerator can also be of other structures, which are not limited by the present application.

[0202] In some embodiments, the refrigerator 10 further includes a refrigeration system 103 and a control assembly 104. The refrigeration system 103 and the control assembly 104 can be electrically connected.

[0203] For example, FIG. 14 is a structural schematic diagram of a refrigeration system 103 provided by some embodiments of the present application. As shown in FIG. 14, the refrigeration system 103 includes:

[0204] a compressor 31 configured to provide power for refrigeration of the refrigerator 10;

[0205] a condenser 32 configured to dissipate heat of the refrigerant from the compressor 31;

[0206] an evaporator 33 configured to provide cold energy to the refrigeration compartment 11 and / or the freezing compartment.

[0207] In some embodiments, the refrigerator and the refrigeration system shown in FIGS. 13 and 14 can be the same as the refrigerator and the refrigeration system shown in FIGS. 1 and 2.

[0208] 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; in the defrosting mode, the flow direction of the refrigerant is controlled to be from the compressor 31 to the evaporator 33. In some embodiments, the electromagnetic valve 34 is electrically connected to the control assembly 104, and the control assembly 104 can control the electromagnetic valve 34 according to the mode of the refrigerant.

[0209] In some embodiments, referring to FIG. 15 or FIG. 16, the electromagnetic valve 34 includes:

[0210] The first connecting port b1 is in communication with the exhaust port of the compressor 31;

[0211] The second connecting port b2 is in communication with the condenser 32;

[0212] The third connecting port b3 is in communication with the intake port of the compressor 31;

[0213] The fourth connecting port b4 is in communication with the evaporator 33.

[0214] The control assembly 104 is configured to: when the refrigeration system 103 is in the refrigeration mode, control the first connecting port b1 and the second connecting port b2 of the electromagnetic valve 34 to be in communication, and the third connecting port b3 and the fourth connecting port b4 to be in communication, so that 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; when the refrigeration system 103 is in the defrosting mode, control the first connecting port b1 and the fourth connecting port b4 of the electromagnetic valve 34 to be in communication, and the second connecting port b2 and the third connecting port b3 to be in communication, so that the refrigerant flowing out of the exhaust port of the compressor 31 flows to the evaporator 33, and then flows to the condenser 32 from the evaporator 33, and finally flows to the compressor 31.

[0215] In some embodiments, the control component 104 monitors the temperature, pressure, humidity and other data of the refrigeration system in real time, and automatically determines whether the current mode is refrigeration mode or defrosting mode. For example, the system can detect the temperature change of the refrigeration chamber or freezing chamber through the temperature sensor, and determine whether defrosting operation is needed. Once the system detects the need to switch the working mode, the control component 104 automatically sends a signal to switch the refrigerant flow path through the electromagnetic valve 34. The control component 104 can adjust the operation mode of the refrigeration system according to the temperature control requirements set by the user, so as to achieve more efficient energy utilization. For example, the system can automatically adjust the refrigerant flow and working pressure according to the environmental temperature inside and outside the refrigerator, load condition and the like, improve the refrigeration effect and reduce energy consumption. The control component 104 can also increase the anti-blocking detection mechanism to determine whether the throttling device is blocked by monitoring the pressure change of the refrigeration system. If an abnormality is detected, the control component 104 can adjust the refrigerant flow direction through the electromagnetic valve to reduce the impact on the blocked component and avoid system damage.

[0216] For example, FIG. 15 is a schematic diagram of the flow direction of the refrigerant of the refrigeration system 103 in the refrigeration mode according to some embodiments of the present application. As shown in FIG. 15, 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 through the condenser 32, and the temperature is continuously lowered to become a normal-temperature, high-pressure saturated vapor. Then, the saturated vapor is throttled and decompressed into a normal-temperature, low-pressure wet vapor through the throttling device (not shown in the figure) between the condenser 32 and the evaporator 33. Subsequently, the wet vapor starts to absorb 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 through the compressor 31.

[0217] For example, FIG. 16 is a schematic diagram of the flow direction of the refrigerant of the refrigeration system 103 in the defrosting mode according to some embodiments of the present application. As shown in FIG. 16, 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 flows to the evaporator 33 to defrost the evaporator 33 and then enters the condenser 32 through the throttling device (not shown in the figure) between the condenser 32 and the evaporator 33 to evaporate and return to the compressor 31. In this process, the high-temperature, high-pressure refrigerant can melt the ice and frost condensed on the evaporator 33 through heat conduction in the evaporator 33 to achieve defrosting.

[0218] In some embodiments, FIG. 17 is a structural schematic diagram of a refrigeration system 103 according to some embodiments of the present application. As shown in FIG. 17, the refrigeration system 103 further comprises:

[0219] A throttling device 357 is arranged between the condenser 32 and the evaporator 33.

[0220] A first dry filter 36 is arranged between the condenser 32 and the throttling device 357.

[0221] A second dry filter 37 is arranged between the throttling device 357 and the evaporator 33.

[0222] When the refrigeration system 103 is in the refrigeration mode, the electromagnetic valve 34 allows the compressor 31 to communicate with the condenser 32, and the refrigerant flowing out of the compressor 31 passes through the condenser 32, the first dry filter 36, the throttling device 357, the second dry filter 37, and flows to the evaporator 33. When the refrigeration system 103 is in the defrosting mode, the electromagnetic valve 34 allows the compressor 31 to communicate with the evaporator 33, and the refrigerant flowing out of the compressor 31 passes through the evaporator 33, the second dry filter 37, the throttling device 357, the first dry filter 36, and flows to the condenser 32.

[0223] In some embodiments, the first dry filter and the second dry filter are arranged on both sides of the throttling device, and the throttling device, the first dry filter and the second dry filter are arranged between the condenser and the evaporator. When the refrigeration system is in the refrigeration mode, the electromagnetic valve allows the compressor to communicate with the condenser, and the refrigerant flowing out of the compressor passes through the condenser, the first dry filter, the throttling device, the second dry filter, and flows to the evaporator. When the refrigeration system is in the defrosting mode, the electromagnetic valve allows the compressor to communicate with the evaporator, and the refrigerant flowing out of the compressor passes through the evaporator, the second dry filter, the throttling device, the first dry filter, and flows to the condenser. Thus, impurity filtering and moisture absorption can be performed when the refrigerant flows in reverse, preventing the throttling device from being blocked and affecting the operation of the refrigeration system. In some embodiments, the third connection port b3 of the electromagnetic valve 34 is connected to the air inlet of the compressor 31 through a first pipeline, and part of the pipeline is arranged in close contact with the throttling device 357.

[0224] FIG. 18 is a structural schematic diagram of a refrigeration system 103 according to some embodiments of the present application. As shown in FIG. 18, the first pipeline can be extended so that part of the pipeline can be in close contact with the throttling device 357, so that the cold energy of the pipeline can be conducted into the throttling device 357, which can reduce the temperature of the refrigerant in the throttling device 357, thereby increasing the supercooling degree of the refrigerator. In addition, due to the reuse of the cold energy of the refrigeration system 103, energy saving can be achieved. It can be understood that the supercooling degree of the refrigerator is increased by this method, and the increase is relatively small, which will not cause excessive freezing or icing of the food, thereby affecting the taste and quality of the food.

[0225] In some embodiments, FIG. 19 is a structural schematic view of a first drying filter and a second drying filter according to some embodiments of the present application. As shown in FIG. 19, the refrigerator 10 further comprises a first housing 38 having a first receiving cavity 381, the first housing 38 being provided with a first port a11, a second port a21, a third port a31 and a fourth port a41 which are in communication with the first receiving cavity 381. The first port a11 is in communication with the condenser 32, and the second port a21 is in communication with the evaporator 33.

[0226] In some embodiments, the first receiving cavity 381 is provided with a first sub-receiving cavity 3811 and a second sub-receiving cavity 3812 in the depth direction by a partition 383. The first drying filter 36 is filled and arranged in the first sub-receiving cavity 3811 (the first drying filter 36 is not shown in FIG. 19). The second drying filter 37 is filled and arranged in the second sub-receiving cavity 3812 (the second drying filter 37 is not shown in FIG. 19). The first sub-receiving cavity 3811 is in communication with the first port a11 and the third port a31, and the second sub-receiving cavity 3812 is in communication with the second port a21 and the fourth port a41. The two ends of the throttling device 357 are in communication with the third port a31 and the fourth port a41, respectively.

[0227] When the refrigeration system 103 is in the refrigeration mode, the electromagnetic valve 34 causes the compressor 31 to be in communication with the condenser 32, and the refrigerant flowing out of the compressor 31 flows through the condenser 32, the first port a11, the first drying filter 36, the third port a31, the throttling device 357, the fourth port a41, the second drying filter 37 and the second port a21 to the evaporator 33. When the refrigeration system 103 is in the defrosting mode, the electromagnetic valve 34 causes the compressor 31 to be in communication with the evaporator 33, and the refrigerant flowing out of the compressor 31 flows through the evaporator 33, the second port a21, the second drying filter 37, the fourth port a41, the throttling device 357, the third port a31, the first drying filter 36 and the first port a11 to the condenser 32. In some embodiments, the first drying filter and the second drying filter can be arranged as an integral structure for easy installation. In some embodiments, the first drying filter 36 is referred to as a first drying filter structure, and the second drying filter 37 is referred to as a second drying filter structure.

[0228] In some embodiments, the throttling device 357 can be closely integrated with the first dry filter 36 and the second dry filter 37 to form an integrated module, reducing the size of the equipment and facilitating installation and maintenance. The integrated module can achieve independent replacement and maintenance of each component through modular design, improving the convenience and maintainability of the system. The throttling device 357 can be designed to have dynamic adjustment capability to adapt to different working modes (cooling mode and defrosting mode). In the cooling mode, the throttling device 357 allows the refrigerant to enter the evaporator at an appropriate flow rate and pressure for cooling. In the defrosting mode, the throttling device 357 should be able to support the reverse flow of refrigerant to avoid affecting the defrosting effect due to excessively low or high refrigerant pressure. In the defrosting mode, the throttling device 357 needs to have good reverse flow characteristics, i.e., it can maintain stable throttling effect when the flow direction of the refrigerant is reversed, ensuring smooth heating of the evaporator and heat dissipation of the condenser. The throttling device 357 can automatically adjust its throttling characteristics according to the pressure, temperature changes and working mode switching of the system to achieve better energy efficiency and refrigeration effect. In some embodiments, to improve filtering efficiency, the first dry filter 36 and the second dry filter 37 can use a multi-layer filtering design, first removing large impurities through a coarse filter, and then absorbing moisture and small impurities through dry filter material. This design can prolong the service life of the filtering structure and improve system stability. In some embodiments, the first dry filter 36 and the second dry filter 37 can be designed with automatic drainage and cleaning functions. For example, when the system switches to the defrosting mode, the internal filtering structure can automatically drain accumulated moisture through valves or drainage ports to prevent moisture from freezing in the filter and maintain efficient operation of the system.

[0229] In some embodiments, Figure 20 is a structural schematic diagram of a first dry filter and a second dry filter provided by some embodiments of the present application. As shown in Figure 20, the isolation member 383 is a partition, the third port a31 is arranged on one side close to the partition, and the fourth port a41 is arranged on the other side close to the partition. By arranging the third port and the fourth port on both sides of the partition, the throttling device can communicate with the first dry filter and the second dry filter through the third port and the fourth port, so that the refrigerant can pass through the dry filtering structure before entering the throttling device in both forward flow and reverse flow, which can prevent the throttling device from being blocked.

[0230] In some embodiments, Figure 21 is a structural schematic diagram of a first dry filter and a second dry filter provided by some embodiments of the present application. As shown in Figure 21, the isolation member 383 is provided with a first channel P1 and a second channel P2. The first channel P1 is used to communicate the first sub-containment cavity 3811 and the third port a31. The second channel P2 is used to communicate the second sub-containment cavity 3812 and the fourth port a41.

[0231] In some embodiments, the partition 383 can be a cylindrical component, FIG. 21 is a sectional view of the first drying filter 36 and the second drying filter 37 in the depth direction, the first passage P1 and the second passage P2 in FIG. 21 are right-angle passages, and the first passage P1 and the second passage P2 can also be arranged as arc-shaped passages, which is not limited in the present application.

[0232] In some embodiments, FIG. 22 is a structural schematic diagram of a first drying filter and a second drying filter provided by some embodiments of the present application, referring to FIG. 22, the first drying filter 36 includes:

[0233] a first filter screen 361 fixedly arranged in the first sub-receiving cavity 3811 and close to the first port a11;

[0234] a second filter screen 363 fixedly arranged in the first sub-receiving cavity 3811 and close to the partition 383;

[0235] a first drying agent 362 filled between the first filter screen 361 and the second filter screen 363.

[0236] In some embodiments, the second drying filter 37 includes:

[0237] a third filter screen 371 fixedly arranged in the second sub-receiving cavity 3812 and close to the second port a21;

[0238] a fourth filter screen 373 fixedly arranged in the second sub-receiving cavity 3812 and close to the partition 383;

[0239] a second drying agent 372 filled between the third filter screen 371 and the fourth filter screen 373.

[0240] In some embodiments, the first drying filter 36 and the second drying filter 37 are composed of two filter screens and a drying agent arranged between the two filter screens, which can realize impurity filtration and moisture absorption in both forward flow and reverse flow of the refrigerant, thereby preventing the throttling device from being blocked.

[0241] In some embodiments, FIG. 23 is a structural schematic diagram of a first drying filter and a second drying filter provided by some embodiments of the present application. As shown in FIG. 23, the first filter screen 361, the second filter screen 363, the third filter screen 371 and the fourth filter screen 373 are conical. The first filter screen 361 is arranged with the top facing the first port a11, and the second filter screen 363 is arranged with the top facing the first port a11. That is, the first filter screen 361 and the second filter screen 363 are arranged in the same direction. The third filter screen 371 is arranged with the top facing the second port a21, and the fourth filter screen 373 is arranged with the top facing the second port a21. That is, the third filter screen 371 and the fourth filter screen 373 are arranged in the same direction, and the third filter screen 371 and the fourth filter screen 373 are arranged in the opposite direction of the first filter screen 361 and the second filter screen 363.

[0242] It should be noted that FIG. 23 is a sectional view of the first drying filter 36 and the second drying filter 37 in the depth direction. Taking the first filter screen 361 as an example, FIG. 24 is a schematic diagram of a first filter screen 361 according to some embodiments of the present application. The top of the first filter screen 361 is shown in FIG. 24. In some embodiments, the filter screen can be conical, and the top of the filter screen of the first drying filter 36 faces the first port, and the top of the filter screen of the second drying filter 37 faces the second port, thereby increasing the filtering area and improving the filtering efficiency.

[0243] In some embodiments, the first sub- containing cavity 3811 and the second sub- containing cavity 3812 can be symmetrically arranged in the depth direction. It should be noted that the symmetry of the first sub- containing cavity 3811 and the second sub- containing cavity 3812 can be understood as that the first drying filter 36 in the first sub- containing cavity 3811 and the second drying filter 37 in the second sub- containing cavity 3812 have mirror symmetry in shape, size, etc. As shown in FIG. 23, the first filter screen 361 and the fourth filter screen 373 are symmetrically arranged, and the filtering particles of the first filter screen 361 and the fourth filter screen 373 are of the same size. The second filter screen 363 and the third filter screen 371 are symmetrically arranged, and the filtering particles of the second filter screen 363 and the third filter screen 371 are of the same size. The first drying agent 362 and the second drying agent 372 are symmetrically arranged, and the first drying agent 362 and the second drying agent 372 have the same moisture absorption amount or moisture absorption rate, etc. By symmetrically arranging the first sub- containing cavity 3811 and the second sub- containing cavity 3812, the same drying filter structure can be passed through when the refrigerant flows forward and reversely, the dryness and cleanliness inside the refrigeration system can be kept consistent, and the stability and performance of the refrigeration system can be ensured.

[0244] Figure 25 is a schematic view of the flow direction of refrigerant when the refrigeration system 103 is in the refrigeration mode and the defrost mode according to some embodiments of the present application. As shown in Figure 25, when the refrigeration system 103 is in the refrigeration mode, the refrigerant flows out of the condenser 32, through the first port a11, the first filter 361, the first desiccant 362, the second filter 363, the throttling device 357, the third filter 371, the second desiccant 372, the fourth filter 373, and out of the second port a21. When the refrigeration system 103 is in the defrost mode, the refrigerant flows out of the evaporator 33, through the second port a21, the fourth filter 373, the second desiccant 372, the third filter 371, the throttling device 357, the second filter 363, the first desiccant 362, the first filter 361, and out of the first port a11.

[0245] In some embodiments, the first filter 361 has a larger pore size than the second filter 363. The fourth filter 373 has a larger pore size than the third filter 371. In some embodiments, the first filter 361 has the same pore size as the fourth filter 373, and the second filter 363 has the same pore size as the third filter 371. In some embodiments, the first filter 361 has a larger pore size than the second filter 363, and the fourth filter 373 has a larger pore size than the third filter 371. In some embodiments, the first filter 361 has a larger pore size than the second filter 363, and the fourth filter 373 has a smaller pore size than the third filter 371. In some embodiments, the first filter 361, the second filter 363, the third filter 371, and the fourth filter 373 can also function to hold the desiccant.

[0246] In some embodiments, the first filter 361 has a larger pore size than the second filter 363. The fourth filter 373 has a larger pore size than the third filter 371. In some embodiments, the first filter 361 has the same pore size as the fourth filter 373, and the second filter 363 has the same pore size as the third filter 371. In some embodiments, the first filter 361 has a larger pore size than the second filter 363, and the fourth filter 373 has a larger pore size than the third filter 371. In some embodiments, the first filter 361 has a larger pore size than the second filter 363, and the fourth filter 373 has a smaller pore size than the third filter 371. In some embodiments, the first filter 361, the second filter 363, the third filter 371, and the fourth filter 373 can also function to hold the desiccant.

[0247] In some embodiments, Fig. 26 is a structural schematic diagram of a first drying filter and a second drying filter provided by some embodiments of the present application. As shown in Fig. 26, the refrigerator 10 further comprises a second housing 39 and a third housing 310, the second housing 39 has a second containing cavity 391, and the third housing 310 has a third containing cavity 3101. The second housing 39 is provided with a first port a11 and a third port a31 which communicate with the second containing cavity 391. The third housing 310 is provided with a second port a21 and a fourth port a41 which communicate with the third containing cavity 3101. The first port a11 communicates with the condenser, and the second port a21 communicates with the evaporator. The two ends of the throttling device 357 respectively communicate with the third port a31 and the fourth port a41. The first drying filter 36 is filled and arranged in the second containing cavity 391. The second drying filter 37 is filled and arranged in the third containing cavity 3101.

[0248] In some embodiments, the first drying filter and the second drying filter can be formed into two drying filters arranged on the two sides of the throttling device, which is convenient for maintenance. The structures of the first drying filter 36 and the second drying filter 37 can refer to the above-mentioned embodiments, which will not be described here again. For example, refer to Fig. 23.

[0249] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0250] In order to facilitate explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to exhaust or limit the embodiments to the specific forms disclosed above. Various modifications and variations can be derived according to the above teachings. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

[0251] In the present application, "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper means that the front and rear associated objects are in an "or" relationship.

[0252] In the present application, "a plurality of" means two or more. The first, second, and the like appearing in the embodiments of the present application in some embodiments of the present application are only for the purpose of description and distinction of the description object, and do not have order, nor represent the special limitation of the number of devices in some embodiments of the present application, and cannot constitute any limitation on some 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.

[0253] 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.

[0254] In the present application, "of", "corresponding", "corresponding", "relevant" and "corresponding" can be used interchangeably. It should be pointed out that when the difference is not emphasized, the meaning expressed is consistent.

[0255] In the present application, "equal" can be used with "less than" or "greater than", but not with "less than" and "greater than" at the same time. When "equal" is used with "less than", it is applicable to the technical solutions adopted by "less than". When "equal" is used with "greater than", it is applicable to the technical solutions adopted by "greater than".

Claims

1. A refrigerator comprising: a cabinet; a refrigeration system disposed in the cabinet, comprising: a compressor; a condenser in communication with the compressor; an evaporator in communication with the compressor; a solenoid valve disposed between the compressor and the condenser and the evaporator, wherein when the refrigeration system is in a defrost mode, the solenoid valve allows the compressor to communicate with the condenser, and refrigerant flowing out of the compressor flows through the condenser to the evaporator; and when the refrigeration system is in a refrigeration mode, the solenoid valve allows the compressor to communicate with the evaporator, and refrigerant flowing out of the compressor flows to the evaporator. 2.The refrigerator of claim 1, further comprising: a flow control assembly having a first port connected to the condenser and a second port connected to the evaporator, the flow control assembly being configured to: when the refrigeration system is in the refrigeration mode, control the refrigerant to flow from the first port into the flow control assembly, from the second port, and at a first flow rate from the second port; and when the refrigeration system is in the defrost mode, control the refrigerant to flow from the second port into the flow control assembly, from the first port, and at a second flow rate from the first port; and wherein the first flow rate is less than the second flow rate. 3.The refrigerator according to claim 2, wherein, the flow control assembly comprising: a first branch provided with a first throttling device and a first dry filter; a second branch provided with a second throttling device; and a check valve having an inlet connected to a second end of the second throttling device and an outlet connected to a first end of the second throttling device; wherein the first dry filter has two ends connected to the first port and a first end of the first throttling device, respectively, a second end of the first throttling device is connected to a first end of the second throttling device, and a second end of the second throttling device is connected to the evaporator through the second dry filter.

4. The refrigerator of claim 3, wherein, the solenoid valve comprising: a first connection port connected to a discharge port of the compressor; a second connection port connected to the condenser; a third connection port connected to an intake port of the compressor through a first pipeline; and a fourth connection port connected to the evaporator; wherein a portion of the first pipeline is arranged in contact with the first throttling device and the second throttling device.

5. The refrigerator according to claim 3 or 4, wherein, the first throttling device has a flow rate greater than that of the second throttling device. 6.The refrigerator of claim 2, wherein, 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 allow refrigerant flowing out of the condenser to flow to the evaporator through the target throttling device; the target throttling device being the first throttling device or the second throttling device; and when the refrigeration system is in the defrost mode, turn on the first throttling device and the second throttling device, and allow refrigerant flowing out of the condenser to flow to the evaporator through the first throttling device and the second throttling device.

7. The refrigerator of claim 6, wherein, the flow control assembly comprising: The first branch is 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; The second branch is provided in parallel with the first branch and is 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 is connected with the evaporator and the second port respectively.

8. The refrigerator of claim 7, wherein, The electromagnetic valve comprises: A first connecting port connected with an exhaust port of the compressor; A second connecting port connected with the condenser; A third connecting port connected with an air inlet of the compressor through a first pipeline; and A fourth connecting port connected with the evaporator; Part of the first pipeline is arranged in contact with the first throttling device. 9.The refrigerator of claim 8, wherein, Part of the pipeline is arranged in contact with the second throttling device and between the first throttling device and the second throttling device. 10.The refrigerator of claim 6, wherein, The flow control assembly further comprises: A switching valve comprising an inlet, a first outlet and a second outlet; A first drying filter 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 second drying filter connected with the evaporator at a first end and connected with the first throttling device and the second throttling device at a second end; The switching valve is configured to: When the refrigeration system is in a refrigeration mode, control the inlet and the first outlet to be communicated, so that the refrigerant flowing out of the first drying filter flows to the second drying filter through the first throttling device, or control the inlet and the second outlet to be communicated, so that 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 a defrosting mode, control the inlet to be communicated with the first outlet and the second outlet, so that 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. 11.The refrigerator of claim 6, wherein, The flow of the first throttling device is smaller than the flow of the second throttling device.

12. A refrigerator comprising: A cabinet; A refrigeration system arranged in the cabinet and comprising: A compressor; A condenser in communication with the compressor; An evaporator in communication with the compressor; An electromagnetic valve arranged between the compressor and the condenser and the evaporator; A throttling device arranged between the condenser and the evaporator; When the refrigeration system is in a refrigeration mode, the electromagnetic valve enables the compressor to be in communication with the condenser, so that the refrigerant flowing out of the compressor flows to the evaporator through the condenser and the throttling device; When the refrigeration system is in a defrosting mode, the electromagnetic valve enables the compressor to be in communication with the evaporator, so that the refrigerant flowing out of the compressor flows to the condenser through the evaporator and the throttling device. 13.The refrigerator of claim 12, wherein, The refrigeration system further comprises: a first drying filter arranged between the condenser and the evaporator; a second drying filter arranged between the condenser and the evaporator; wherein the first drying filter and the second drying filter are arranged on two sides of the throttling device; when the refrigeration system is in the refrigeration mode, the refrigerant flowing out of the compressor also passes through the first drying filter and the second drying filter; when the refrigeration system is in the defrosting mode, the refrigerant flowing out of the compressor also passes through the second drying filter and the first drying filter.

14. The refrigerator according to claim 13, further comprising: a first housing having a first accommodating cavity, and provided with a first port, a second port, a third port and a fourth port in communication with the first accommodating cavity; wherein a partition is arranged in the accommodating cavity, and the first accommodating cavity is divided into a first sub-accommodating cavity and a second sub-accommodating cavity in a depth direction by the partition; the first sub-accommodating cavity is in communication with the first port and the third port, and the second sub-accommodating cavity is in communication with the second port and the fourth port; the first port is in communication with the condenser, and the second port is in communication with the evaporator; two ends of the throttling device are in communication with the third port and the fourth port, respectively; the first drying filter is filled and arranged in the first sub-accommodating cavity; and the second drying filter is filled and arranged in the second sub-accommodating cavity. 15.The refrigerator according to claim 14, wherein, The first sub-accommodating cavity and the second sub-accommodating cavity are symmetrically arranged in the depth direction.

16. The refrigerator according to claim 13, further comprising: a second housing having a second accommodating cavity, and provided with a first port and a third port in communication with the second accommodating cavity; a third housing having a third accommodating cavity, and provided with a second port and a fourth port in communication with the third accommodating cavity; wherein the first port is in communication with the condenser, and the second port is in communication with the evaporator; two ends of the throttling device are in communication with the third port and the fourth port, respectively; the first drying filter is filled and arranged in the second accommodating cavity; and the second drying filter is filled and arranged in the third accommodating cavity.

17. The refrigerator according to claim 14 or 15, wherein, The first drying filter comprises: a first filter screen fixedly arranged in the first sub-accommodating cavity and close to the first port; a second filter screen fixedly arranged in the first sub-accommodating cavity and close to the partition; a first drying agent filled between the first filter screen and the second filter screen; The second drying filter comprises: a third filter screen fixedly arranged in the second sub-accommodating cavity and close to the second port; a fourth filter screen fixedly arranged in the second sub-accommodating cavity and close to the partition; a second drying agent filled between the third filter screen and the fourth filter screen. 18.The refrigerator of claim 17, wherein, The first filter screen, the second filter screen, the third filter screen and the fourth filter screen are conical; the first filter screen is arranged with a top facing the first port, and the second filter screen is arranged with a top facing the first port. The third filter screen is arranged with the top facing the second port, and the fourth filter screen is arranged with the top facing the second port.

19. The refrigerator according to claim 17 or 18, wherein, The first filter screen has a larger pore size than the second filter screen, and the fourth filter screen has a larger pore size than the third filter screen.

20. The refrigerator of claim 14 or 15, wherein, The partition is provided with a first channel and a second channel, the first channel is used for connecting the first sub-cavity and the third port, and the second channel is used for connecting the second sub-cavity and the fourth port.

21. The refrigerator according to claim 14 or 15, wherein, The partition is a partition plate, the third port is arranged on one side close to the partition plate, and the fourth port is arranged on the other side close to the partition plate.

22. A refrigerator comprising: a cabinet; a refrigeration system arranged in the cabinet, and comprising: a compressor; a condenser in communication with the compressor; an evaporator in communication with the compressor; a solenoid valve arranged between the compressor and the condenser and the evaporator; a throttling device arranged between the condenser and the evaporator; wherein, when the refrigeration system is in a refrigeration mode, the solenoid valve makes the compressor in communication with the condenser, and the refrigerant flowing out of the compressor flows to the evaporator through the condenser and the throttling device; when the refrigeration system is in a defrosting mode, the solenoid valve makes the compressor in communication with the evaporator, and the refrigerant flowing out of the compressor flows to the condenser through the evaporator and the throttling device.

23. The refrigerator of claim 22, wherein, The refrigeration system further comprises a drying and filtering device arranged between the condenser and the evaporator; wherein, when the refrigeration system is in a refrigeration mode, the refrigerant flowing out of the compressor also flows through the drying and filtering device; when the refrigeration system is in a defrosting mode, the refrigerant flowing out of the compressor also flows through the drying and filtering device.

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