Defrosting control method for refrigeration equipment and refrigeration equipment

Abstract

The invention relates to the technical field of refrigeration, and discloses a defrosting control method for refrigeration equipment, the refrigeration equipment comprises an evaporator cabin, a refrigeration air duct and a fan cavity arranged between the evaporator cabin and the refrigeration air duct, and the refrigeration equipment further comprises a heating device arranged in the evaporator cabin, the evaporator cabin comprises an evaporator cavity and a defrosting air duct arranged on the outer side of the evaporator cavity, the fan cavity comprises a fan air door used for opening and closing the defrosting air duct and a refrigeration air duct, and the defrosting control method comprises the steps that in response to a defrosting starting signal of the refrigeration equipment, a compressor of the refrigeration equipment is controlled to be closed; and after the first preset time, the heating device is controlled to be started, and the fan air door is controlled to move so as to close the refrigeration air duct and open the defrosting air duct, so that the heated air flows into the evaporator cavity along the defrosting air duct. Therefore, the defrosting efficiency can be improved, the number of defrosting elements is reduced, the assembly difficulty is lowered, and the influence on the temperature in the storage cavity of the refrigeration equipment is reduced. The invention further discloses the refrigeration equipment.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and in particular to a defrost control method for refrigeration equipment and refrigeration equipment. Background Art

[0002] At present, during the refrigeration process of an air-cooled freezer or refrigerator, the air temperature in the storage cavity is relatively high. When the air in the storage cavity exchanges heat with the evaporator, the water vapor in the air will be cooled and condensed on the evaporator to form frost. As the frost becomes thicker, the channel for air passing through the evaporator becomes smaller, and the air volume is therefore reduced, resulting in a worse cooling effect. Therefore, the evaporator of the air-cooled freezer or refrigerator needs to be defrosted periodically to ensure good refrigeration performance.

[0003] Related technology discloses a refrigerator and a defrost control method thereof, the refrigerator includes a box body, an evaporation chamber and a compressor cabin are defined in the box body, a guide air duct is arranged between the evaporation chamber and the compressor cabin, a guide air duct is installed with a guide fan and a first damper for opening and closing the guide air duct, and the defrost control method includes: obtaining a defrost start signal of the refrigerator; turning off the compressor and the refrigeration fan of the refrigerator according to the defrost start signal of the refrigerator; obtaining a first temperature of the evaporation chamber and a second temperature of the compressor cabin; judging whether the first temperature is lower than the second temperature; if so, opening the first damper and controlling the guide fan to push the high-temperature gas in the compressor cabin into the evaporation chamber.

[0004] During the implementation of the embodiments of the present disclosure, it was found that at least the following problems exist in the related art:

[0005] The related technology uses a guide fan to push the high-temperature gas in the compressor cabin into the evaporation chamber for defrosting. The defrosting efficiency is slow, and a separate guide fan needs to be added for defrosting. The assembly of the guide fan is difficult.

[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 this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[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 elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a defrost control method for a refrigeration device and the refrigeration device, so as to improve the defrost efficiency, reduce the number of defrost components, and lower the difficulty of assembly.

[0009] According to a first aspect of an embodiment of the present invention, a defrost control method for a refrigeration device is provided, the refrigeration device including an evaporator compartment, a refrigeration duct and a fan chamber arranged between the evaporator compartment and the refrigeration duct, the refrigeration device also including a heating device arranged in the evaporator compartment, wherein the evaporator compartment includes an evaporator chamber and a defrost duct arranged outside the evaporator chamber, the fan chamber includes a fan damper for opening and closing the defrost duct and the refrigeration duct, the defrost control method including: in response to a defrost start signal of the refrigeration device, controlling the compressor of the refrigeration device to turn off; after a first preset time, controlling the heating device to start, and controlling the fan damper to move to close the refrigeration duct and open the defrost duct, so that the heated air flows into the evaporator chamber along the defrost duct.

[0010] Optionally, after controlling the heating device to start, the defrost control method further includes: obtaining the actual temperature of the evaporator chamber; when the actual temperature of the evaporator chamber is greater than the preset defrost temperature, controlling the heating device to turn off; and controlling the compressor to start after a second preset time.

[0011] Optionally, when the actual temperature of the evaporator chamber is greater than a preset defrosting temperature, the defrost control method further includes: controlling the fan to be turned off.

[0012] Optionally, after controlling the compressor to start, the defrost control method further includes: after a third preset time, controlling the fan to start, and controlling the fan damper to move to open the refrigeration air duct and close the defrost air duct.

[0013] Optionally, a defrost damper is provided at the connection point between the defrost air duct and the evaporator chamber. After the third preset time, the defrost control method further includes: controlling the movement of the defrost damper to isolate the defrost air duct and the evaporator chamber.

[0014] Optionally, the evaporator compartment further includes a return air vent and a return air damper for opening and closing the return air vent. After the third preset time, the defrost control method further includes: controlling the movement of the return air damper to open the return air vent.

[0015] Optionally, obtaining the actual temperature of the evaporator chamber includes: obtaining the actual temperature of the evaporator chamber after a fourth preset time; or obtaining the actual temperature of the evaporator chamber in real time.

[0016] Optionally, a defrost damper is provided at the connection between the defrost air duct and the evaporator chamber. After a first preset time, the defrost control method further includes: controlling the movement of the defrost damper to connect the defrost air duct and the evaporator chamber, so that air flows into the evaporator chamber along the defrost air duct.

[0017] Optionally, the evaporator compartment further includes a return air port and a return air damper for opening and closing the return air port. Before controlling the heating device to start, the defrost control method further includes: controlling the movement of the return air damper to close the return air port.

[0018] According to a second aspect of an embodiment of the present invention, a refrigeration device is provided, comprising: a box body, which defines an installation space; an inner tank, which is arranged in the installation space, encloses a refrigeration space, and is provided with a refrigeration air duct; an evaporator cover, which is arranged on the upper surface of the bottom wall of the inner tank, and divides the refrigeration space into a storage cavity and an evaporator compartment, the evaporator compartment comprising an evaporator cavity and a defrost air duct arranged on the outside of the evaporator cavity, and an evaporator is arranged inside the evaporator cavity; a heating device, which is arranged in the evaporator cavity; a fan cavity, which is respectively connected to the refrigeration air duct and the evaporator compartment, and is provided with a fan inside, including a fan damper for opening and closing the defrost air duct and the refrigeration air duct; a controller, which comprises a processor and a memory, and the memory stores a control program, which is used to implement the above-mentioned defrost control method when executed by the processor.

[0019] The defrost control method for refrigeration equipment and the refrigeration equipment provided in the embodiments of the present disclosure can achieve the following technical effects:

[0020] During defrosting, a fan and defrost duct are added to the existing system, based on heat conduction between the heating device and the evaporator. The fan drives air from the fan chamber along the defrost duct into the evaporator chamber, and then back into the fan chamber through the evaporator, achieving air circulation within the evaporator compartment. This distributes the heat generated by the heating device more evenly. This shifts the heat transfer mode from single conduction to conduction and forced convection, accelerating heat exchange between the heating device and the evaporator, improving defrost efficiency, reducing the operating time of the heating device, and saving energy. Furthermore, the same fan is used for both the cooling and defrosting processes, reducing the number of fans and the number of fan on / off cycles, thus simplifying fan assembly. By controlling the position of the fan damper, the opening and closing of the cooling and defrost ducts are controlled to meet cooling and defrosting requirements, and the impact of the defrost process on the temperature within the storage compartment of the refrigeration unit is reduced. Furthermore, the defrost duct is located within the evaporator compartment, shortening the defrost path, accelerating the defrost process, reducing the space occupied by the remaining refrigeration unit, and simplifying the design of the defrost duct.

[0021] 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

[0022] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0023] Figure 1 is a structural diagram of a refrigeration device provided by an embodiment of the present disclosure;

[0024] Figure 2is a schematic diagram of a defrost control method for refrigeration equipment provided by an embodiment of the present disclosure;

[0025] Figure 3 is a schematic diagram of another defrost control method for refrigeration equipment provided by an embodiment of the present disclosure;

[0026] Figure 4 is a schematic diagram of another defrost control method for refrigeration equipment provided by an embodiment of the present disclosure;

[0027] Figure 5 is a schematic diagram of another defrost control method for refrigeration equipment provided by an embodiment of the present disclosure;

[0028] Figure 6 is a schematic diagram of another defrost control method for refrigeration equipment provided by an embodiment of the present disclosure;

[0029] Figure 7 is a schematic diagram of another defrost control method for refrigeration equipment provided by an embodiment of the present disclosure;

[0030] Figure 8 is a schematic diagram of a refrigeration device provided by an embodiment of the present disclosure in a refrigeration state;

[0031] Figure 9 is a schematic diagram of a refrigeration device provided by an embodiment of the present disclosure in a defrosting state;

[0032] Figure 10 yes Figure 9 Schematic diagram of the cross section along the AA direction;

[0033] Figure 11 is a schematic structural diagram of a foam member provided in an embodiment of the present disclosure;

[0034] Figure 12 It is a structural schematic diagram of the fan cover provided in an embodiment of the present disclosure.

[0035] Reference numerals:

[0036] 10: Refrigeration equipment; 11: Inner tank;

[0037] 20: Storage cavity; 21: Refrigeration air duct; 211: Vertical air duct; 212: Extended air duct;

[0038] 30: Evaporator compartment; 31: Evaporator cavity; 32: Defrost air duct; 321: First defrost air duct; 322: Second defrost air duct; 323: First end; 324: Second end; 33: Evaporator; 34: Evaporator cover; 341: Top panel; 342: Side panel; 343: Return air vent; 35: Foam member; 351: Top wall; 3511: Top air duct slot; 352: Side wall; 3521: Side air duct slot; 36: Return air damper; 361: Top return air damper; 362: Side return air damper;

[0039] 40: Fan cavity; 41: Fan damper; 411: First position; 412: Second position; 413: First fan damper; 414: Second fan damper; 42: Fan cover; 421: First cover; 4211: Air guide port; 4212: Upper air guide port; 4213: Side air guide port; 422: Second cover; 4221: Air supply port; 4222: Upper air supply port; 4223: Side air supply port. DETAILED DESCRIPTION

[0040] In order to be able to understand the features and technical content 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 accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of 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.

[0041] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0042] 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 having 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.

[0043] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0044] Unless otherwise stated, the term "plurality" means two or more.

[0045] 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 means: A or B.

[0046] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0047] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0048] Combine Figures 1 to 12 As shown, the refrigeration device 10 includes an evaporator compartment 30, a refrigeration air duct 21, and a fan chamber 40 disposed between the evaporator compartment 30 and the refrigeration air duct 21. The refrigeration device 10 also includes a heating device disposed in the evaporator compartment 30. The evaporator compartment 30 includes an evaporator chamber 31 and a defrost air duct 32 disposed outside the evaporator chamber 31. The fan chamber 40 includes a fan damper 41 for opening and closing the defrost air duct 32 and the refrigeration air duct 21. The refrigeration device 10 also includes a controller.

[0049] Combine Figure 2 As shown, the embodiment of the present disclosure provides a defrost control method for a refrigeration device 10, comprising:

[0050] S201, the controller controls the compressor of the refrigeration device 10 to turn off in response to a defrost start signal of the refrigeration device 10;

[0051] S202, after the first preset time, the controller controls the heating device to start, and controls the fan damper 41 to move to close the refrigeration air duct 21 and open the defrost air duct 32, so that the heated air flows into the evaporator chamber 31 along the defrost air duct 32.

[0052] After the compressor is turned off, a first preset time, such as 2 minutes, is waited before the fan damper 41 is controlled to move and the heating device is started. In this way, after the compressor is turned off and before the first preset time expires, the fan can continue to transfer the remaining cooling energy generated by the evaporator 33 to the storage chamber 20 of the refrigeration device 10, thereby fully utilizing the cooling energy. It is understood that the first preset time may also be zero.

[0053] According to the defrost control method for refrigeration equipment 10 provided by the embodiment of the present disclosure, when the evaporator 33 is defrosted, a fan and a defrost duct 32 are added on the basis of heat conduction between the heating device and the evaporator 33. The fan drives the air in the fan chamber 40 along the defrost duct 32 to flow into the evaporator chamber 31, and then returns to the fan chamber 40 through the evaporator 33, thereby realizing air circulation in the evaporator compartment 30, making the heat generated by the heating device more evenly distributed. The heat transfer form is converted from the original single heat conduction to heat conduction and forced convection heat transfer, which accelerates the heat exchange rate between the heating device and the evaporator 33, improves the defrost efficiency, reduces the opening time of the heating device, and saves electricity. Moreover, the same fan is used for the refrigeration and defrost processes, reducing the number of fans and the number of times the fan is turned on and off, and reducing the difficulty of assembling the fan. By controlling the movement position of the fan damper 41, the opening or closing of the refrigeration duct 21 and the defrost duct 32 is controlled to meet the requirements of refrigeration and defrosting, and the impact of the defrost process on the temperature in the storage chamber 20 of the refrigeration equipment 10 can also be reduced. In addition, the defrost air duct 32 is arranged in the evaporator compartment 30, which can shorten the defrost path, speed up the defrost speed, reduce the occupation of the remaining space of the refrigeration equipment 10, and reduce the design difficulty of the defrost air duct 32.

[0054] Optionally, after controlling the heating device to start, the defrost control method further includes: obtaining the actual temperature of the evaporator chamber 31; when the actual temperature of the evaporator chamber 31 is greater than the preset defrost temperature, controlling the heating device to turn off; and controlling the compressor to start after a second preset time.

[0055] It is understandable that when a heating device such as a heating wire is energized and working, it can generate a high temperature of over 100 degrees, causing the operating power of the refrigeration equipment 10 in the defrost stage to reach two to three times the operating power in the refrigeration stage, and the power consumption in the defrost stage rises sharply.

[0056] Optionally, the refrigeration device 10 further includes a temperature sensor.

[0057] Combine Figure 3 As shown, the embodiment of the present disclosure provides another defrost control method for a refrigeration device 10, comprising:

[0058] S301, the controller controls the compressor of the refrigeration device 10 to turn off in response to a defrost start signal of the refrigeration device 10;

[0059] S302, after the first preset time, the controller controls the heating device to start, and controls the fan damper 41 to move to close the cooling air duct 21 and open the defrost air duct 32, so that the heated air flows into the evaporator chamber 31 along the defrost air duct 32;

[0060] S303, the temperature sensor obtains the actual temperature of the evaporator chamber 31;

[0061] S304, when the actual temperature of the evaporator chamber 31 is greater than the preset defrosting temperature, the controller controls the heating device to turn off;

[0062] S305: After the second preset time, the controller controls the compressor to start.

[0063] In this way, the defrosting process of the refrigeration unit 10 is controlled based on the actual temperature of the evaporator chamber 31. If the actual temperature of the evaporator chamber 31 exceeds the preset defrost temperature, the heating device is controlled to shut down, saving energy. After the heating device is shut down, the temperature inside the evaporator chamber 31 is higher, and the remaining frost on the evaporator 33 continues to melt, and the defrost water continues to be discharged from the evaporator chamber 30. After a second preset time, such as three minutes, the compressor starts to compress the refrigerant and initiate the refrigeration cycle. It is understood that the second preset time can also be zero, that is, when the heating device is turned off, the compressor starts directly without waiting.

[0064] Optionally, when the actual temperature of the evaporator chamber 31 is greater than a preset defrosting temperature, the defrost control method further includes controlling the fan to be turned off.

[0065] The controller can control the fan and the heating device to be turned off at the same time, or it can control the heating device to be turned off first, and the fan continues to drive the air along the defrost air duct 32 to flow into the evaporator chamber 31, drying the water droplets on the evaporator 33, speeding up the defrost efficiency, and then the controller controls the fan to be turned off.

[0066] Optionally, after controlling the compressor to start, the defrost control method further includes controlling the fan to start after a third preset time, and controlling the fan damper 41 to move to open the refrigeration air duct 21 and close the defrost air duct 32.

[0067] Combine Figure 4 As shown, the embodiment of the present disclosure provides another defrost control method for a refrigeration device 10, comprising:

[0068] S401, the controller controls the compressor of the refrigeration device 10 to turn off in response to a defrost start signal of the refrigeration device 10;

[0069] S402: After the first preset time, the controller starts the heating device and controls the fan damper 41 to close the cooling air duct 21 and open the defrost air duct 32, so that the heated air flows into the evaporator chamber 31 along the defrost air duct 32;

[0070] S403, the temperature sensor obtains the actual temperature of the evaporator chamber 31;

[0071] S404, when the actual temperature of the evaporator chamber 31 is greater than the preset defrosting temperature, the controller controls the heating device to turn off and controls the fan to turn off;

[0072] S405, after the second preset time, the controller controls the compressor to start;

[0073] S406 , after the third preset time, the controller controls the fan to start, and controls the fan damper 41 to move to open the refrigeration air duct 21 and close the defrost air duct 32 .

[0074] In this way, the controller controls the movement of the fan damper 41 to open the refrigeration duct 21 and close the defrost duct 32. The cold energy generated by the evaporator 33 is delivered to the refrigeration duct 21 through the fan, flows into the storage chamber 20 from the air outlet of the refrigeration duct 21, and cools the items in the storage chamber 20, thereby achieving refrigeration. The cold energy does not flow into the defrost duct 32, thereby reducing the loss of cold energy. The controller controls the start of the compressor and the start of the fan with a third preset time interval. In this way, after the defrost is completed, the residual hot and humid water vapor in the evaporator chamber 31 can condense on the evaporator 33, avoiding condensation on the fan, which would cause the fan to freeze and affect the normal operation of the refrigeration device 10. It is understood that the third preset time can also be zero.

[0075] Optionally, a defrost damper (not shown in the figure) is provided at the connection point between the defrost air duct 32 and the evaporator chamber 31. After a third preset time, the defrost control method further includes controlling the movement of the defrost damper to isolate the defrost air duct 32 and the evaporator chamber 31.

[0076] The defrost air duct 32 includes a first end 323 and a second end 324 . The first end 323 is connected to the fan chamber 40 , and the second end 324 is connected to the evaporator chamber 31 . The fan damper 41 is provided at the first end 323 , and the defrost damper is provided at the second end 324 .

[0077] Combine Figure 5 As shown, the embodiment of the present disclosure provides another defrost control method for a refrigeration device 10, comprising:

[0078] S501, the controller controls the compressor of the refrigeration device 10 to turn off in response to a defrost start signal of the refrigeration device 10;

[0079] S502: After the first preset time, the controller controls the heating device to start, and controls the fan damper 41 to move to close the cooling air duct 21 and open the defrost air duct 32, so that the heated air flows into the evaporator chamber 31 along the defrost air duct 32;

[0080] S503, the temperature sensor obtains the actual temperature of the evaporator chamber 31;

[0081] S504, when the actual temperature of the evaporator chamber 31 is greater than the preset defrosting temperature, the controller controls the heating device to turn off and controls the fan to turn off;

[0082] S505, after the second preset time, the controller controls the compressor to start;

[0083] S506, after the third preset time, the controller controls the defrost damper to move to isolate the defrost air duct 32 and the evaporator chamber 31;

[0084] S507 , the controller controls the fan to start, and controls the fan damper 41 to move to open the refrigeration air duct 21 and close the defrost air duct 32 .

[0085] In this way, after the third preset time, the first end 323 and the second end 324 of the defrost duct 32 are both closed, the evaporator chamber 31 and the fan chamber 40 are connected, and the fan drives the cold air in the evaporator chamber 31 to flow into the refrigeration duct 21, realizing the refrigeration process of the refrigeration equipment 10.

[0086] Optionally, the evaporator compartment 30 further includes a return air port 343 and a return air damper 36 for opening and closing the return air port 343 . After the third preset time, the defrost control method further includes controlling the return air damper 36 to move to open the return air port 343 .

[0087] Combine Figure 6 As shown, the embodiment of the present disclosure provides another defrost control method for a refrigeration device 10, comprising:

[0088] S601, the controller controls the compressor of the refrigeration device 10 to turn off in response to a defrost start signal of the refrigeration device 10;

[0089] S602: After the first preset time, the controller starts the heating device and controls the fan damper 41 to close the cooling air duct 21 and open the defrost air duct 32, so that the heated air flows into the evaporator chamber 31 along the defrost air duct 32.

[0090] S603, the temperature sensor obtains the actual temperature of the evaporator chamber 31;

[0091] S604, when the actual temperature of the evaporator chamber 31 is greater than the preset defrosting temperature, the controller controls the heating device to turn off and controls the fan to turn off;

[0092] S605, after the second preset time, the controller controls the compressor to start;

[0093] S606, after the third preset time, the controller controls the fan to start, and controls the fan damper 41 to move to open the cooling air duct 21 and close the defrost air duct 32;

[0094] S607 , the controller controls the return air damper 36 to move to open the return air port 343 .

[0095] In this way, the return air damper 36 moves to open the return air port 343, and the air in the storage chamber 20 can flow into the evaporator compartment 30 from the return air port 343, flow out after exchanging heat with the evaporator 33, enter the refrigeration duct 21 through the fan chamber 40, and then flow back into the storage chamber 20 from the air outlet of the refrigeration duct 21, realizing an air-cooling cycle.

[0096] Optionally, obtaining the actual temperature of the evaporator cavity 31 includes obtaining the actual temperature of the evaporator cavity 31 after a fourth preset time.

[0097] For example, after the heating device has heated for 5 minutes, the actual temperature of the evaporator chamber 31 is obtained to reduce the number of operating times of the temperature sensor.

[0098] Optionally, acquiring the actual temperature of the evaporator cavity 31 includes acquiring the actual temperature of the evaporator cavity 31 in real time.

[0099] In this way, the actual temperature of the evaporator chamber 31 can be monitored in real time, defrosting can be ended in time, and electric energy can be saved.

[0100] Optionally, a defrost damper is provided at the connection between the defrost air duct 32 and the evaporator chamber 31. After a first preset time, the defrost control method further includes controlling the movement of the defrost damper to connect the defrost air duct 32 and the evaporator chamber 31, so that air flows into the evaporator chamber 31 along the defrost air duct 32.

[0101] In this way, after the first preset time, the first end 323 and the second end 324 of the defrost air duct 32 are both opened, the evaporator chamber 31 and the defrost air duct 32 are connected, and the fan drives the heated air to flow into the evaporator chamber 31 along the defrost air duct 32, thereby realizing defrosting of the evaporator 33.

[0102] Optionally, the evaporator compartment 30 further includes a return air port 343 and a return air damper 36 for opening and closing the return air port 343 . Before controlling the heating device to start, the defrost control method further includes controlling the return air damper 36 to move to close the return air port 343 .

[0103] Combine Figure 7 As shown, the embodiment of the present disclosure provides another defrost control method for a refrigeration device 10, comprising:

[0104] S701, the controller controls the compressor of the refrigeration device 10 to turn off in response to a defrost start signal of the refrigeration device 10;

[0105] S702, the controller controls the return air damper 36 to move to close the return air port 343;

[0106] S703, after the first preset time, the controller controls the heating device to start, and controls the fan damper 41 to move to close the refrigeration air duct 21 and open the defrost air duct 32, so that the heated air flows into the evaporator chamber 31 along the defrost air duct 32.

[0107] In this way, closing the return air outlet 343 before controlling the heating device to start can reduce the impact of the temperature rise during the defrosting process on the temperature inside the storage cavity 20, avoid excessive temperature fluctuations of the food near the return air outlet 343, and avoid frequent heating and cooling that leads to a decrease in the moisture content and freshness of the food.

[0108] Combine Figures 1 to 12 As shown, an embodiment of the present disclosure provides a refrigeration device 10, comprising a housing, an inner tank 11, and an evaporator cover 34. The housing defines an installation space. The inner tank 11 is disposed within the installation space, enclosing a refrigeration space and provided with a refrigeration air duct 21. The evaporator cover 34 is disposed on the upper surface of the bottom wall of the inner tank 11, dividing the refrigeration space into a storage chamber 20 and an evaporator compartment 30. The evaporator compartment 30 includes an evaporator chamber 31 and a defrost air duct 32 disposed outside the evaporator chamber 31. The refrigeration device 10 also includes an evaporator 33, a heating device, a fan chamber 40, and a fan. The evaporator 33 is disposed within the evaporator chamber 31, and the heating device is disposed within the evaporator chamber 31. The fan chamber 40 is in communication with the refrigeration air duct 21 and the evaporator compartment 30, respectively. The fan chamber 40 includes a fan damper 41 for opening and closing the defrost air duct 32 and the refrigeration air duct 21. The fan is disposed within the fan chamber 40. The refrigeration device 10 further includes a controller, which includes a processor and a memory. The memory stores a control program, which is used to implement the above-mentioned defrost control method when executed by the processor.

[0109] In the refrigeration device 10 provided by the embodiment of the present disclosure, when the evaporator 33 is defrosted, a fan and a defrost duct 32 are added on the basis of heat conduction between the heating device and the evaporator 33. The fan drives the air in the fan chamber 40 to flow along the defrost duct 32 into the evaporator chamber 31, and then returns to the fan chamber 40 through the evaporator 33, thereby realizing air circulation in the evaporator compartment 30, making the heat generated by the heating device more evenly distributed. The heat transfer form is converted from the original single heat conduction to heat conduction and forced convection heat transfer, which speeds up the heat exchange rate between the heating device and the evaporator 33, improves the defrost efficiency, reduces the opening time of the heating device, and saves electricity. Moreover, the same fan is used for the refrigeration and defrost processes, which reduces the number of fans and the number of times the fan is turned on and off, and reduces the difficulty of assembling the fan. By controlling the movement position of the fan damper 41, the opening or closing of the refrigeration duct 21 and the defrost duct 32 is controlled to meet the requirements of refrigeration and defrost, and can also reduce the impact of the defrost process on the temperature in the storage chamber 20 of the refrigeration device 10. In addition, the defrost air duct 32 is arranged in the evaporator compartment 30, which can shorten the defrost path, speed up the defrost speed, reduce the occupation of the remaining space of the refrigeration equipment 10, and reduce the design difficulty of the defrost air duct 32.

[0110] Optionally, the refrigeration device 10 is a refrigerator or a freezer. The refrigerator or freezer further includes a compressor and a condenser, and the compressor, evaporator and condenser are connected by pipelines.

[0111] Optionally, combined Figures 8 to 12 As shown, the fan chamber 40 further includes a fan cover 42, which houses the fan. The fan cover 42 includes a first cover 421 facing the evaporator compartment 30, and the first cover 421 is provided with an air guide 4211. The air guide 4211 is used to connect the fan chamber 40 and the defrost air duct 32.

[0112] In this way, the fan can drive air from the air guide port of the first cover plate 421 into the defrost air duct 32, and then into the evaporator cavity 31, defrosting the evaporator 33, and finally returning to the fan cavity 40 to realize air circulation.

[0113] Optionally, a fan damper 41 is provided at the air guide port 4211 for opening or closing the air guide port 4211. In cooling mode, the fan damper 41 closes the air guide port 4211; in defrosting mode, the fan damper 41 opens the air guide port 4211.

[0114] In this way, the opening and closing of the air guide port 4211 is controlled by the fan damper 41. When the refrigeration equipment 10 needs cooling, the fan damper 41 closes the air guide port 4211, and the fan drives the cold air in the evaporator chamber 31 into the refrigeration air duct 21 instead of flowing into the defrost air duct 32, thereby reducing unnecessary cooling loss; when the refrigeration equipment 10 needs defrosting, the fan damper 41 opens the air guide port 4211, and the fan drives the air in the fan chamber 40 along the defrost air duct 32 into the evaporator chamber 31, thereby accelerating the defrosting efficiency of the evaporator 33, realizing air circulation between the fan chamber 40 and the evaporator compartment 30, and improving the heat exchange efficiency between the heating device and the evaporator 33, thereby reducing the working time of the heating device and saving electricity.

[0115] Optionally, the fan cover 42 further includes a second cover 422, which is disposed toward the cooling duct 21. The second cover 422 is provided with an air supply port 4221, which is used to connect the fan cavity 40 and the cooling duct 21. The fan damper 41 is configured to move between the air supply port 4221 and the air guide port 4211. During cooling, the fan damper 41 blocks the air guide port 4211, exposing the air supply port 4221. During defrosting, the fan damper 41 blocks the air supply port 4221, exposing the air guide port 4211.

[0116] In this way, a fan damper 41 can move between the air supply port 4221 and the air guide port 4211, and the opening and closing of the refrigeration air duct 21 and the defrost air duct 32 can be controlled by controlling the movement position of the fan damper 41. During cooling, the fan damper 41 is controlled to move to the first position 411 blocking the air guide port 4211 and exposing the air supply port 4221, the defrost air duct 32 is closed, and the refrigeration air duct 21 is connected with the fan chamber 40 and the evaporator chamber 31 through the air supply port 4221; during defrosting, the fan damper 41 is controlled to move to the second position 412 blocking the air supply port 4221 and exposing the air guide port 4211, the refrigeration air duct 21 is closed, the defrost air duct 32 is opened, and the fan chamber 40 and the evaporator chamber 31 realize a new air circulation through the defrost air duct 32. The heat generated during the defrost process will not flow into the storage chamber 20 through the refrigeration air duct 21, thereby reducing the impact of the defrost process on the temperature inside the storage chamber 20 and ensuring the freshness of the food stored in the storage chamber 20.

[0117] Optionally, the fan damper 41 is a rotating structure, or the fan damper 41 is a sliding structure.

[0118] When the fan damper 41 is a rotating structure, the fan damper 41 can rotate and move between a first position 411 blocking the air guide outlet 4211 and a second position 412 blocking the air supply outlet 4221 to meet the cooling or defrosting requirements; when the fan damper 41 is a sliding structure, the fan damper 41 can slide between a first position 411 blocking the air guide outlet 4211 and a second position 412 blocking the air supply outlet 4221 to meet the cooling or defrosting requirements.

[0119] Optionally, combined Figures 10 to 12 As shown, the evaporator compartment 30 also includes an evaporator cover 34 and a foam member 35. The evaporator cover 34 is arranged in the refrigeration space of the refrigeration equipment 10, dividing the refrigeration space into the storage cavity 20 and the evaporator compartment 30. The evaporator cover 34 includes a top plate 341 and side plates 342 extending along the length direction of the evaporator 33. The top plate 341 is arranged above the evaporator 33, and the side plates 342 are connected to the top plate 341. The foam member 35 is arranged on the inner side of the evaporator cover 34 and surrounds the evaporator cavity 31. The foam member 35 includes a top wall 351 and a side wall 352 connected to the top wall 351. The top wall 351 is arranged below the top plate 341, and the side wall 352 is arranged on the inner side of the side plate 342. Among them, a top air duct groove 3511 is provided on the surface of the top wall 351 on the side facing away from the evaporator chamber 31, and the top air duct groove 3511 and the top plate 341 enclose the first defrost air duct 321; and / or, a side air duct groove 3521 is provided on the surface of the side wall 352 on the side facing away from the evaporator chamber 31, and the side air duct groove 3521 and the side plate 342 enclose the second defrost air duct 322.

[0120] Optionally, the air guide port 4211 includes an upper air guide port 4212 and a side air guide port 4213 , the upper air guide port 4212 is connected to the first defrost air duct 321 , and the side air guide port 4213 is connected to the second defrost air duct 322 .

[0121] Optionally, the cooling air duct 21 includes a vertical air duct 211 and a horizontal extended air duct 212 , and the air supply port 4221 includes an upper air supply port 4222 and a side air supply port 4223 , the upper air supply port 4222 is connected to the vertical air duct 211 , and the side air supply port 4223 is connected to the extended air duct 212 .

[0122] Optionally, the fan damper 41 includes a first fan damper 413 and a second fan damper 414 , the first fan damper 413 can move between the upper air guide port 4212 and the upper air supply port 4222 , and the second fan damper 414 can move between the side air guide port 4213 and the side air supply port 4223 .

[0123] In this way, the opening and closing of the vertical air duct 211 and the first defrost air duct 321 are controlled by the first fan damper 413, and the opening and closing of the extension air duct 212 and the second defrost air duct 322 are controlled by the second fan damper 414 to meet the needs of various products.

[0124] Optionally, the top air duct groove 3511 is recessed from the top plate 341 toward the evaporator, and / or the side air duct groove 3521 is recessed from the side plate 342 toward the evaporator.

[0125] In this way, the top air duct groove 3511 is recessed from the top plate 341 toward the evaporator 33, which can increase the flow area of ​​the first defrost air duct 321, thereby accelerating the air convection speed and improving the heat exchange efficiency; the side air duct groove 3521 is recessed from the side plate 342 toward the evaporator 33, which can increase the flow area of ​​the second defrost air duct 322, thereby accelerating the air convection speed and improving the heat exchange efficiency.

[0126] Optionally, the evaporator cover 34 is provided with at least one of an upper return air vent 343 and a side return air vent 343. The upper return air vent 343 is provided on the top panel 341, and the side return air vent 343 is provided on the side panel 342. The evaporator compartment 30 further includes a return air damper 36 provided on the evaporator cover 34. The return air damper 36 includes at least one of an upper return air damper 361 and a side return air damper 362. The upper return air damper 361 is provided on the upper return air vent 343 for opening or closing the upper return air vent 343; the side return air damper 362 is provided on the side return air vent 343 for opening or closing the side return air vent 343. During cooling, the return air damper 36 opens, exposing the upper return air vent 343 and / or the side return air vent 343. During defrosting, the return air damper 36 closes, shielding the upper return air vent 343 and / or the side return air vent 343.

[0127] During cooling, the upper return air damper 361 and / or the side return air damper 362 are opened, exposing the upper return air outlet 343 and / or the side return air outlet 343, and the hot air in the storage cavity 20 can enter the evaporator compartment 30 from the upper return air outlet 343 and / or the side return air outlet 343 to exchange heat with the evaporator 33; during defrosting, the upper return air damper 361 and / or the side return air damper 362 are closed, blocking the upper return air outlet 343 and / or the side return air outlet 343, and the heated air in the evaporator compartment 30 cannot enter the storage cavity 20 from the upper return air outlet 343 and / or the side return air outlet 343, thereby reducing the impact on the temperature in the storage cavity 20 and avoiding excessive temperature fluctuations of the food near the return air outlet 343 (upper return air outlet 343 and / or the side return air outlet 343), and frequent heating and cooling resulting in a decrease in the moisture content and freshness of the food.

[0128] Optionally, the upper return air damper 361 and / or the side return air damper 362 is a sliding structure, or the upper return air damper 361 and / or the side return air damper 362 is a rotating structure.

[0129] When the upper return air damper 361 and / or the side return air damper 362 is a sliding structure, for example, the upper return air damper 361 and the side return air damper 362 are connected to form an L-shaped return air damper 36, the L-shaped return air damper 36 can move along the outer surface of the evaporator cover 34 to open or close the upper return air outlet 343 and the side return air outlet 343; when the upper return air damper 361 and / or the side return air damper 362 is a rotating structure, for example, the upper return air damper 361 and / or the side return air damper 362 is arranged on the inner side of the evaporator cover 34, the upper return air damper 361 can be rotatably arranged on the upper return air outlet 343 to open or close the upper return air outlet 343, and the side return air damper 362 can be rotatably arranged on the side return air outlet 343 to open or close the side return air outlet 343.

[0130] Optionally, the top air duct groove 3511 and / or the side air duct groove 3521 are integrally formed with the foam member 35 .

[0131] In this way, the top air duct groove 3511 and / or the side air duct groove 3521 are made into an integrally formed structure with the foam member 35 , which reduces the difficulty in designing the top air duct groove 3511 and / or the side air duct groove 3521 .

[0132] 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 expressly 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 defrost control method for a refrigeration device, the refrigeration device comprising an evaporator compartment, a refrigeration air duct, and a fan chamber disposed between the evaporator compartment and the refrigeration air duct, the refrigeration device further comprising a heating device disposed in the evaporator compartment, characterized in that: The evaporator compartment includes an evaporator chamber and a defrost air duct provided outside the evaporator chamber. The fan chamber includes a fan damper for opening and closing the defrost air duct and the refrigeration air duct. The defrost control method includes: In response to a defrost start signal of the refrigeration equipment, controlling the compressor of the refrigeration equipment to shut down; After the first preset time, the heating device is controlled to start, and the fan damper is controlled to move to close the refrigeration air duct and open the defrost air duct, so that the heated air flows into the evaporator cavity along the defrost air duct.

2. The defrost control method according to claim 1, characterized in that: After the control heating device is started, it also includes: Get the actual temperature of the evaporator cavity; When the actual temperature of the evaporator chamber is greater than the preset defrost temperature, the heating device is controlled to be turned off; After the second preset time, the compressor is controlled to start.

3. The defrost control method according to claim 2, characterized in that: When the actual temperature of the evaporator chamber is greater than the preset defrost temperature, the following also applies: Control the fan to shut down.

4. The defrost control method according to claim 3, characterized in that: After controlling the compressor start, it also includes: After the third preset time, the fan is controlled to start, and the fan damper is controlled to move to open the refrigeration air duct and close the defrost air duct.

5. The defrost control method according to claim 4, characterized in that: A defrost damper is provided at the connection between the defrost air duct and the evaporator chamber. After the third preset time, the following steps are further included: Control the movement of the defrost damper to isolate the defrost air duct and the evaporator cavity.

6. The defrost control method according to claim 4, characterized in that: The evaporator compartment further includes a return air vent and a return air damper for opening and closing the return air vent. After a third preset time, the evaporator compartment further includes: Control the return air damper movement to open the return air vent.

7. The defrost control method according to claim 2, characterized in that: Obtaining the actual temperature of the evaporator cavity includes: After a fourth preset time, the actual temperature of the evaporator cavity is obtained; or, the actual temperature of the evaporator cavity is obtained in real time.

8. The defrost control method according to any one of claims 1 to 7, characterized in that: A defrost damper is provided at the connection between the defrost air duct and the evaporator chamber, and after a first preset time, the following further comprises: The movement of the defrost damper is controlled to connect the defrost air duct and the evaporator cavity, so that air flows into the evaporator cavity along the defrost air duct.

9. The defrost control method according to any one of claims 1 to 7, characterized in that: The evaporator compartment also includes a return air vent and a return air damper for opening and closing the return air vent. Before the heating device is started, it also includes: Control the return air damper movement to close the return air vent.

10. A refrigeration device, characterized in that: include: The box defines the installation space; The inner tank is arranged in the installation space, encloses a refrigeration space and is provided with a refrigeration air duct; The evaporator cover is arranged on the upper surface of the bottom wall of the inner tank, dividing the refrigeration space into a storage cavity and an evaporator compartment. The evaporator compartment includes an evaporator cavity and a defrost air duct arranged outside the evaporator cavity. The evaporator is arranged inside the evaporator cavity. A heating device is provided in the evaporator cavity; The fan chamber is connected to the refrigeration air duct and the evaporator compartment respectively, and is provided with a fan inside, including a fan damper for opening and closing the defrost air duct and the refrigeration air duct; The controller includes a processor and a memory. The memory stores a control program. When the control program is executed by the processor, it is used to implement the defrost control method according to any one of claims 1 to 9.

Images