Refrigerator

Abstract

The utility model relates to the technical field of refrigeration equipment, and discloses a refrigerator which comprises a refrigerant circulation pipeline, a condenser, an evaporator, a throttling device, a bypass pipeline and an electromagnetic valve. Wherein the condenser and the evaporator are sequentially arranged on the refrigerant circulating pipeline, the condenser comprises a condensation outlet, and the evaporator comprises an evaporation inlet; the throttling device is communicated between the condensation outlet and the evaporation inlet; the bypass pipeline is communicated between the condensation outlet and the evaporation inlet; the electromagnetic valve is arranged at the condensation outlet, and the electromagnetic valve is at least controlled to be switched between a first conduction state and a second conduction state; when the electromagnetic valve is switched to the first conduction state, the electromagnetic valve communicates with the throttling device so that the throttling device can be connected into the refrigerant circulation pipeline; when the electromagnetic valve is switched to the second conduction state, the electromagnetic valve communicates with the bypass pipeline so that the bypass pipeline can be connected into the refrigerant circulation pipeline. According to the refrigerator, the defrosting effect of the evaporator can be improved, and the defrosting energy consumption is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, for example, to a refrigerator. Background Art

[0002] When the refrigerator is in the refrigeration process, water vapor will continuously condense into frost on the evaporator. The frost layer will adhere to the evaporator, causing the heat exchange efficiency of the evaporator to drop significantly.

[0003] In the related art, an electric heating element is provided on the evaporator of the refrigerator or at the bottom of the evaporator. When the refrigerator is refrigerating normally, the high-temperature and high-pressure gaseous refrigerant coming out of the compressor passes through the condenser, exchanges heat with the external environment, and becomes a low-temperature and high-pressure liquid refrigerant. After the throttling and pressure reduction effect of the throttling device, it becomes a low-temperature and low-pressure state, and then enters the evaporator to evaporate. The evaporator cools the storage space of the refrigerator, and the evaporator becomes a low-temperature and low-pressure gaseous refrigerant and returns to the compressor. When the whole pair of evaporators is defrosted, the electric heating element works to heat the evaporator.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] When the evaporator is defrosted by radiation heat transfer or heat conduction through the heating wire, the heat transfer efficiency is low, the defrosting time is long, and the energy consumption in the defrosting process is high.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The disclosed embodiment provides a refrigerator to improve the defrosting effect of an evaporator and reduce the defrosting energy consumption.

[0009] In some embodiments, the refrigerator includes a refrigerant circulation pipeline, a condenser, an evaporator, a throttling device, a bypass pipeline and a solenoid valve; wherein the condenser and the evaporator are arranged on the refrigerant circulation pipeline in sequence, the condenser includes a condensation outlet, and the evaporator includes an evaporation inlet; the throttling device is connected between the condensation outlet and the evaporation inlet; the bypass pipeline is connected between the condensation outlet and the evaporation inlet; the solenoid valve is arranged at the condensation outlet, and the solenoid valve is at least controlled to switch between a first conduction state and a second conduction state; when the solenoid valve is switched to the first conduction state, it is connected to the throttling device so that the throttling device is connected to the refrigerant circulation pipeline; when the solenoid valve is switched to the second conduction state, it is connected to the bypass pipeline so that the bypass pipeline is connected to the refrigerant circulation pipeline.

[0010] In some embodiments, the solenoid valve includes a first valve port, a second valve port and a third valve port; wherein the first valve port is connected to the condensation outlet; the second valve port is connected to the throttling device; the third valve port is connected to the bypass line; when the solenoid valve is switched to the first conduction state, the first valve port is connected to the second valve port, and the first valve port and the third valve port are disconnected; when the solenoid valve is switched to the second conduction state, the first valve port is connected to the third valve port, and the first valve port and the second valve port are disconnected.

[0011] In some embodiments, the refrigerator further includes a heating element, wherein the heating element is disposed at the bottom of the evaporator, and the heating element is used to heat the evaporator.

[0012] In some embodiments, the heating element includes one of an electric heating wire, an electric heating rod, and an electric heating plate.

[0013] In some embodiments, the refrigerator further comprises a heat conductor connected between the evaporator and the heating element, the heat conductor at least partially contacts the evaporator, and the heating element is used to heat the heat conductor so that the heat conductor transfers heat to the evaporator.

[0014] In some embodiments, the heat conductive member is a magnetic heat conductive member made of metal; the heating member is an electromagnetic coil, which is arranged corresponding to the magnetic heat conductive member. When the electromagnetic coil is energized, an induced eddy current is formed in the heat conductive member to make the heat conductive member heat up.

[0015] In some embodiments, the heat conducting member is a metal heat conducting member;

[0016] The heating element is an electric heating element, which is arranged inside the metal heat conductive element or outside the metal heat conductive element and is used to heat the metal heat conductive element.

[0017] In some embodiments, the refrigerator also includes a temperature detection device and a control unit; wherein the temperature detection device is arranged on the evaporator for detecting the temperature of the evaporator; the control unit is electrically connected to the temperature detection device and the solenoid valve, and the control unit is used to control the solenoid valve to switch between a first conduction state and a second conduction state according to the temperature of the evaporator.

[0018] In some embodiments, the control unit is also electrically connected to the heating element; the control unit is also used to turn off the heating element when the solenoid valve is switched to a first conduction state, and to start the heating element when the solenoid valve is switched to a second conduction state.

[0019] In some embodiments, the refrigerator also includes a compressor, which is arranged in the refrigerant circulation pipeline, and the compressor includes an air inlet end and an air outlet end, the air inlet end is connected to the evaporator outlet of the evaporator, and the air outlet end is connected to the condensation inlet of the condenser; the compressor is electrically connected to the control unit; the control unit is also used to control the operation of the compressor when the solenoid valve is switched to the first conduction state, and control the compressor to stop when the solenoid valve is switched to the second conduction state.

[0020] The refrigerator provided by the embodiment of the present disclosure can achieve the following technical effects:

[0021] By means of a solenoid valve arranged at the condensation outlet of the condenser, the parallel connection of the throttling device and the bypass line can be realized; when the refrigerator is operating normally, the solenoid valve switches to the first conduction state to connect the throttling device to the refrigerant circulation line, thereby connecting the condenser and the evaporator, so that the refrigerant can condense and release heat in the condenser, and after further throttling and reducing the pressure through the throttling device, it flows into the evaporator to evaporate and absorb heat, so as to ensure the normal operation of the refrigerator; when the evaporator is defrosted, the solenoid valve switches to the second conduction state to connect the bypass line to the refrigerant circulation line, and under the action of the pressure difference between the evaporator and the condenser, the high-temperature and high-pressure gas in the condenser will enter the evaporator through the bypass line to heat the frost layer on the surface of the evaporator, so that the frost layer on the surface of the evaporator melts and falls off from the inside to the outside, thereby improving the defrosting effect of the evaporator and reducing energy consumption.

[0022] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0024] Figure 1is a structural schematic diagram of a refrigerator provided by an embodiment of the present disclosure;

[0025] Figure 2 is a schematic structural diagram of another refrigerator provided by an embodiment of the present disclosure, wherein the solenoid valve is in a first conduction state;

[0026] Figure 3 is a structural schematic diagram of another refrigerator provided by an embodiment of the present disclosure, wherein the solenoid valve is in a second conduction state;

[0027] Figure 4 is a structural schematic diagram of an evaporator and a heating element provided in an embodiment of the present disclosure;

[0028] Figure 5 is a schematic structural diagram of an evaporator, a heating element, and a heat conducting element provided in an embodiment of the present disclosure;

[0029] Figure 6 is a schematic structural diagram of another evaporator, a heating element, and a heat conducting element provided in an embodiment of the present disclosure;

[0030] Figure 7 It is a schematic structural diagram of another evaporator, a heating element and a heat conducting element provided in an embodiment of the present disclosure.

[0031] Reference numerals:

[0032] 100, refrigerant circulation pipeline; 101, connecting pipeline; 200, condenser; 210, condensation outlet; 220, condensation inlet; 300, evaporator; 310, evaporation inlet; 320, evaporator outlet; 400, throttling device; 500, bypass pipeline; 600, solenoid valve; 610, first valve port; 620, second valve port; 630, third valve port; 700, heating element; 701, electromagnetic coil; 710, heat conductive element; 711, magnetic heat conductive element; 712, metal heat conductive element; 800, compressor. DETAILED DESCRIPTION

[0033] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0034] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0035] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0036] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0037] Unless otherwise stated, the term "plurality" means two or more.

[0038] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0039] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0040] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0041] Combination Figures 1 to 3As shown, the embodiment of the present disclosure provides a refrigerator, including a refrigerant circulation pipeline 100, a condenser 200, an evaporator 300, a throttling device 400, a bypass pipeline 500 and a solenoid valve 600; wherein the condenser 200 and the evaporator 300 are sequentially arranged on the refrigerant circulation pipeline 100, the condenser 200 includes a condensation outlet 210, and the evaporator 300 includes an evaporation inlet 310; the throttling device 400 is connected between the condensation outlet 210 and the evaporation inlet 310; the bypass pipeline 500 is connected to between the condensation outlet 210 and the evaporation inlet 310; the solenoid valve 600 is arranged at the condensation outlet 210, and the solenoid valve 600 is at least controlled to switch between a first conduction state and a second conduction state; when the solenoid valve 600 switches to the first conduction state, it is connected to the throttling device 400 so that the throttling device 400 is connected to the refrigerant circulation pipeline 100; when the solenoid valve 600 switches to the second conduction state, it is connected to the bypass pipeline 500 so that the bypass pipeline 500 is connected to the refrigerant circulation pipeline 100.

[0042] Optionally, the refrigerant circulation pipeline 100 is used to realize the flow and circulation of the refrigerant. The compressor 800, the condenser 200 and the evaporator 300 are sequentially arranged on the circulation pipeline 100, and a throttling device 400 and a bypass pipeline 500 are connected in parallel between the condenser 200 and the evaporator 300, and a solenoid valve 600 is provided at the condensation outlet 210 of the condenser 200. The first end of the throttling device 400 can be communicated with the condensation outlet 210 through the solenoid valve 600, and the second end of the throttling device 400 can be connected with the evaporation inlet 310 of the evaporator 300; the first end of the bypass pipeline 500 can be communicated with the condensation outlet 210 through the solenoid valve 600, and the second end of the bypass pipeline 500 can be connected with the evaporation inlet 310 of the evaporator 300. The solenoid valve 600 is at least controlled to switch between a first conduction state and a second conduction state; when the solenoid valve 600 is switched to the first conduction state, it is connected to the throttling device 400 so that the throttling device 400 is connected to the refrigerant circulation pipeline 100; when the solenoid valve 600 is switched to the second conduction state, it is connected to the bypass pipeline 500 so that the bypass pipeline 500 is connected to the refrigerant circulation pipeline 100.

[0043] When the refrigerator is in normal operation, the solenoid valve 600 is adjusted to switch to the first conduction state, and at this time, the throttling device 400 is connected to the refrigerant circulation pipeline 100. After the high-temperature and high-pressure refrigerant enters the condenser 300 to condense and release heat to become a liquid-phase refrigerant, it passes through the throttling and pressure reduction of the throttling device 400 and enters the evaporator 300 through the evaporation inlet 310. The refrigerant evaporates and absorbs heat in the evaporator 300 to become a gas-phase refrigerant to achieve refrigeration of the storage space in the refrigerator. The gas-phase refrigerant discharged from the evaporation outlet 320 of the evaporator 300 further flows back to the compressor 800 for the next round of circulation.

[0044] When the evaporator 300 is frosted, the solenoid valve 600 is adjusted to switch to the second conduction state. At this time, the compressor 800 can be controlled to stop, and the bypass line 500 is connected to the refrigerant circulation line 100. Under the action of the pressure difference between the evaporator 300 and the condenser 200, the high-temperature and high-pressure gas in the condenser 200 will enter through the bypass line 500 through the condensation outlet 210, and further flow into the evaporator 300 through the evaporation inlet 310 to heat the frost layer on the surface of the evaporator 300, so that the frost layer on the surface of the evaporator 300 melts and falls off from the inside to the outside, thereby improving the defrosting effect of the evaporator 300.

[0045] Optionally, the throttling device 400 is a capillary tube. The capillary tube has a simple structure, works stably and reliably, and has no moving parts inside, so there will be no problem of performance degradation or refrigerant leakage due to wear; in addition, the capillary tube can automatically balance the pressure.

[0046] With the refrigerator provided by the embodiment of the present disclosure, the parallel connection of the throttling device and the bypass line can be realized by means of the solenoid valve arranged at the condensation outlet of the condenser; when the refrigerator is operating normally, the solenoid valve switches to the first conduction state to connect the throttling device to the refrigerant circulation line, thereby connecting the condenser and the evaporator, so that the refrigerant can condense and release heat in the condenser, and after further throttling and reducing the pressure through the throttling device, it flows into the evaporator to evaporate and absorb heat, so as to ensure the normal operation of the refrigerator; when the evaporator is defrosted, the solenoid valve switches to the second conduction state to connect the bypass line to the refrigerant circulation line, and under the action of the pressure difference between the evaporator and the condenser, the high-temperature and high-pressure gas in the condenser will enter the evaporator through the bypass line to heat the frost layer on the surface of the evaporator, so that the frost layer on the surface of the evaporator melts and falls off from the inside to the outside, thereby improving the defrosting effect of the evaporator and reducing energy consumption.

[0047] Optionally, the solenoid valve 600 includes a first valve port 610, a second valve port 620 and a third valve port 630; wherein the first valve port 610 is connected to the condensation outlet 310; the second valve port 620 is connected to the throttling device 400; the third valve port 630 is connected to the bypass line 500; when the solenoid valve 600 is switched to the first conduction state, the first valve port 610 is connected to the second valve port 620, and the first valve port 610 and the third valve port 630 are disconnected; when the solenoid valve 600 is switched to the second conduction state, the first valve port 610 is connected to the third valve port 630, and the first valve port 610 and the second valve port 620 are disconnected.

[0048] By connecting the first valve port 610 with the second valve port 620 and disconnecting the first valve port 610 with the third valve port 630, the throttling device 400 can be connected to the refrigerant circulation pipeline 100, thereby ensuring normal refrigeration operation of the refrigerator. By connecting the first valve port 610 with the third valve port 630 and disconnecting the first valve port 610 with the second valve port 620, the frost layer of the evaporator 300 can be melted from the inside to the outside, making it easier to remove the frost layer.

[0049] Specifically, the second valve port 620 is connected to the first end of the throttling device 400, and the third valve port 630 is connected to the bypass line 500; the second end of the throttling device 400 and the second end of the bypass line 500 are connected in parallel to the connecting line 101 to prevent the throttling device 400 or the bypass line 500 from being directly connected to the evaporator 00. Optionally, a one-way valve is provided between the second end of the throttling device 400 and the connecting line 101 to prevent the refrigerant flowing out of the second end of the bypass line 500 from entering the throttling device 400.

[0050] Optionally, combined Figure 4 As shown, the refrigerator further includes a heating element 700 , which is disposed at the bottom of the evaporator 300 , and is used to heat the evaporator 300 .

[0051] The heating element 700 can be used in conjunction with the bypass line 500. Specifically, when the solenoid valve 600 is switched to the second conduction state, the heating element 700 can be controlled to start, and the heat generated by the heating element 700 can be radiated to the frost layer at the bottom of the evaporator 300, thereby melting the frost layer from the outside to the inside. By making the heating element 700 cooperate with the high-temperature refrigerant to complete the defrosting process, on the basis of ensuring the reliability of defrosting, efficient defrosting is achieved, avoiding the problem of reduced heat exchange efficiency of the evaporator 300, and ensuring the stability of the refrigeration performance of the refrigerator.

[0052] Optionally, the heating element 700 includes one of an electric heating wire, an electric heating rod, and an electric heating plate.

[0053] Optionally, when the heating element 700 includes an electric heating wire, it includes a plurality of electric heating wires to improve the heating effect. The electric heating wires may extend along the length direction of the evaporator 300 and be arranged at intervals along the width direction of the evaporator 300. The electric heating wire is low in price, can efficiently convert electrical energy into electrical energy, has a fast heating speed, and is resistant to high temperature and corrosion, so it is not easy to be damaged and has a long service life.

[0054] Alternatively, when the heating element 700 includes an electric heating wire, it also includes an insulating rod. The insulating rod can extend along the length direction of the evaporator 300 and be fixed to the bottom of the evaporator 300. The electric heating wire is wound around the circumference of the insulating rod in sequence or at intervals. This can improve the safety of the electric heating wire and prevent the electric heating wire from breaking under the impact of falling frost blocks.

[0055] Optionally, when the heating element 700 is a heating rod, the electric heating element is arranged inside the electric heating rod, which has higher safety. At the same time, the electric heating rod can achieve rapid heating.

[0056] Optionally, when the heating element 700 is an electric heating plate, it has a larger radiation area, which can improve the melting efficiency of the frost layer. The electric heating plate uses a large area of ​​electric heating elements, which can achieve uniform heating and avoid local over-high or over-low temperatures; and the electric heating plate usually uses efficient electric heating elements and insulation materials, which can reduce energy consumption and environmental pollution.

[0057] Optionally, the refrigerator further includes a heat conductor 710, which is connected between the evaporator 300 and the heating element 700, and the heat conductor 710 is at least partially in contact with the evaporator 300. The heating element 700 is used to heat the heat conductor 710 so that the heat conductor 710 transfers heat to the evaporator 300.

[0058] The heat generated by the heating element 700 can be transferred to the evaporator 300 by the heat conducting element 710. Combined with the radiation heat transfer of the heating element 700, the melting efficiency of the frost layer on the evaporator 300 can be improved.

[0059] Optionally, combined Figure 5 As shown, the heat conductive member 710 is a magnetic heat conductive member 711 made of metal; the heating member 700 is an electromagnetic coil 701, which is arranged corresponding to the magnetic heat conductive member 710. When the electromagnetic coil 701 is energized, an induced eddy current is formed around the magnetic heat conductive member 711 to heat the magnetic heat conductive member 711.

[0060] When the electromagnetic coil 701 is energized, electromagnetic induction can be generated between the electromagnetic coil 701 and the magnetic heat conductive member 711, and the magnetic heat conductive member 711 is heated. Specifically, the magnetic heat conductive member 711 and the electromagnetic coil 701 are located at the bottom of the evaporator 300; the magnetic heat conductive member 711 is in contact with the bottom end of the evaporator 300, and when the electromagnetic coil 701 heats the magnetic heat conductive member 711, heat is transferred to the evaporator 300 through the magnetic heat conductive member 711, so as to heat and melt the frost layer on the surface of the evaporator 300. Optionally, the electromagnetic coil 701 is powered by alternating current.

[0061] Optionally, the magnetic heat-conducting member 711 includes a magnetic metal material, such as a magnetic stainless steel plate.

[0062] Optionally, combined Figure 6 , Figure 7 As shown, the heat conductive member 710 is a metal heat conductive member 712 ; the heating member 700 is an electric heating member, which is arranged inside the metal heat conductive member 712 or outside the metal heat conductive member 712 for heating the metal heat conductive member 712 .

[0063] The metal heat conductor 712 and the electric heating element can be arranged at the bottom of the evaporator 300; the metal heat conductor 712 is in contact with the bottom of the evaporator 300, and the electric heating element is located on the side of the metal heat conductor 712 facing away from the evaporator 300, so that when the electric heating element heats the metal heat conductor 712, the metal heat conductor 712 is used to transfer heat to the evaporator 300, so as to heat and melt the frost layer on the surface of the evaporator 300.

[0064] Optionally, the electric heating element may be an electric heating wire, an electric heating rod or other electric heating device; the location of the electric heating element is not limited to the location in this embodiment, and the electric heating element may be located on the outer surface of the metal heat conductive element 712 or inside the metal heat conductive element 712. The metal heat conductive element 712 includes heat conductive materials such as aluminum, copper or stainless steel.

[0065] Optionally, the refrigerator also includes a temperature detection device and a control unit; wherein the temperature detection device is arranged on the evaporator to detect the temperature of the evaporator 300; the control unit is electrically connected to the temperature detection device and the solenoid valve, and the control unit is used to control the solenoid valve 600 to switch between a first conduction state and a second conduction state according to the temperature of the evaporator 300.

[0066] The temperature of the evaporator 300 is collected by the temperature detection device, and the state of the solenoid valve 600 is controlled according to the temperature value of the evaporator 300 collected by the temperature detection device. Specifically, when the temperature value of the evaporator 300 is less than the preset value, it means that the evaporator 300 needs to be defrosted, and the solenoid valve 600 is controlled to switch to the second conduction state so that the bypass pipeline 500 is connected to the refrigerant circulation pipeline 100, so that the high-temperature refrigerant in the condenser 200 flows into the evaporator 300 under the action of the pressure difference, so as to heat and defrost the evaporator 300 from the inside; when the temperature value of the evaporator 300 is greater than or equal to the preset value, it means that the evaporator 300 does not need to be defrosted, and the solenoid valve 600 is controlled to switch to the first conduction state so that the throttling device 400 is connected to the refrigerant circulation pipeline 100, so that the refrigerator performs normal refrigeration operation.

[0067] Optionally, the control unit is also electrically connected to the heating element 700; the control unit is also used to turn off the heating element 700 when the solenoid valve 600 switches to the first conduction state, and start the heating element 700 when the solenoid valve 600 switches to the second conduction state.

[0068] Specifically, when the temperature value of the evaporator 300 is less than the preset value, the control unit controls the solenoid valve 600 to switch to the second conduction state and starts the heating element 700, so that the heating element 700 and the high-temperature refrigerant can cooperate to complete the defrosting process. On the basis of ensuring the reliability of defrosting, efficient defrosting can be achieved, thereby improving the defrosting efficiency of the evaporator 300; when the temperature value of the evaporator 300 is greater than or equal to the preset value, the control unit controls the solenoid valve 600 to switch to the first conduction state and turns off the heating element 700.

[0069] Optionally, the refrigerator also includes a compressor 800, which is arranged in the refrigerant circulation pipeline 100, and the compressor includes an air inlet end and an air outlet end, the air inlet end is connected to the evaporator outlet 320 of the evaporator 300, and the air outlet end is connected to the condensation inlet 220 of the condenser 200; the compressor 800 is electrically connected to the control unit; the control unit is also used to control the operation of the compressor 800 when the solenoid valve 600 is switched to the first conduction state, and control the compressor 800 to stop when the solenoid valve 600 is switched to the second conduction state.

[0070] Specifically, when the temperature value of the evaporator 300 is less than the preset value, the control unit controls the solenoid valve 600 to switch to the second conduction state, and at the same time controls the compressor 800 to stop, thereby stopping the circulation of the refrigerant, avoiding the compressor 800 from being unable to work normally due to insufficient high and low pressure difference, thereby improving the safety of the compressor 800; when the temperature value of the evaporator 300 is greater than or equal to the preset value, the control unit controls the solenoid valve 600 to switch to the first conduction state, and at the same time controls the compressor 800 to operate, so that the refrigerator can perform normal refrigeration operation.

[0071] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A refrigerator, characterized in that: include: Refrigerant circulation pipeline; The condenser and the evaporator are sequentially arranged on the refrigerant circulation pipeline, the condenser includes a condensation outlet, and the evaporator includes an evaporation inlet; A throttling device connected between the condensation outlet and the evaporation inlet; A bypass pipeline connected between the condensation outlet and the evaporation inlet; A solenoid valve is arranged at the condensation outlet, and the solenoid valve is at least controlled to switch between a first conduction state and a second conduction state; When the solenoid valve is switched to the first conduction state, it is connected to the throttling device so that the throttling device is connected to the refrigerant circulation pipeline; when the solenoid valve is switched to the second conduction state, it is connected to the bypass pipeline so that the bypass pipeline is connected to the refrigerant circulation pipeline.

2. The refrigerator according to claim 1, characterized in that: The solenoid valve comprises: A first valve port connected to a condensation outlet; The second valve port is connected to the throttling device; The third valve port is connected to the bypass pipeline; When the solenoid valve is switched to the first conduction state, the first valve port is connected to the second valve port, and the first valve port is disconnected from the third valve port; when the solenoid valve is switched to the second conduction state, the first valve port is connected to the third valve port, and the first valve port is disconnected from the second valve port.

3. The refrigerator according to claim 1, characterized in that: Also includes: A heating element is arranged at the bottom of the evaporator, and the heating element is used to heat the evaporator.

4. The refrigerator according to claim 3, characterized in that: The heating element includes one or more of an electric heating wire, an electric heating rod, and an electric heating plate.

5. The refrigerator according to claim 3, characterized in that: Also includes: The heat-conducting member is connected between the evaporator and the heating member. The heat-conducting member is at least partially in contact with the evaporator. The heating member is used to heat the heat-conducting member so that the heat-conducting member transfers heat to the evaporator.

6. The refrigerator according to claim 5, characterized in that: The heat conducting member is a magnetic heat conducting member made of metal; The heating element is an electromagnetic coil, which is arranged corresponding to the magnetic heat-conducting element. When the electromagnetic coil is energized, an induced eddy current is formed around the magnetic heat-conducting element to make the heat-conducting element heat up.

7. The refrigerator according to claim 5, characterized in that: The heat conducting member is a metal heat conducting member; The heating element is an electric heating element, which is arranged inside the metal heat conductive element or outside the metal heat conductive element and is used to heat the metal heat conductive element.

8. The refrigerator according to any one of claims 3 to 7, characterized in that: Also includes: A temperature detection device, disposed on the evaporator, for detecting the temperature of the evaporator; The control unit is electrically connected to the temperature detection device and the electromagnetic valve, and is used to control the electromagnetic valve to switch between a first conduction state and a second conduction state according to the temperature of the evaporator.

9. The refrigerator according to claim 8, characterized in that: The control unit is also electrically connected to the heating element; The control unit is further configured to turn off the heating element when the solenoid valve is switched to a first conduction state, and start the heating element when the solenoid valve is switched to a second conduction state.

10. The refrigerator according to claim 8, characterized in that: Also includes: A compressor is arranged in the refrigerant circulation pipeline, the compressor comprises an air inlet end and an air outlet end, the air inlet end is communicated with the evaporator outlet of the evaporator, and the air outlet end is communicated with the condensation inlet of the condenser; The compressor is electrically connected to the control unit; the control unit is also used to control the compressor to run when the solenoid valve is switched to the first conduction state, and to control the compressor to stop when the solenoid valve is switched to the second conduction state.

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