Refrigeration equipment

Abstract

The utility model relates to the technical field of refrigeration, and discloses refrigeration equipment which comprises a storage cavity, a refrigeration air duct and a refrigeration air duct. The evaporator cabin comprises an evaporator cavity and a defrosting air duct arranged on the outer side of the evaporator cavity, the evaporator cavity communicates with the refrigeration air duct, and an evaporator is arranged in the evaporator cavity; the heating device is arranged in the evaporator cavity and used for defrosting the evaporator; the fan cavity is arranged between the evaporator cabin and the refrigeration air duct, a fan is arranged in the fan cavity, and the fan cavity comprises a fan air door; during refrigeration, the fan air door is located at the first position, the fan cavity communicates with the evaporator cavity and the refrigeration air duct, the fan drives air in the storage cavity to flow into the evaporator cavity, and the air flows into the storage cavity again along the refrigeration air duct after exchanging heat with the evaporator; and during defrosting, the fan air door is located at the second position, the fan cavity communicates with the defrosting air duct, and the fan drives air in the fan cavity to flow into the evaporator cavity along the defrosting air duct and then return to the fan cavity again through the evaporator. Therefore, the defrosting efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and in particular to a refrigeration device. 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 passage for air to pass through the evaporator becomes smaller, and the air volume is therefore reduced, resulting in a worse refrigeration effect. Therefore, the evaporator of the air-cooled freezer or refrigerator needs to be defrosted periodically to ensure good refrigeration performance.

[0003] The related technology discloses an air-cooled refrigerator, comprising: a refrigeration compartment, an evaporator chamber, a compressor compartment, the water receiving tray being arranged above the compressor and / or the condenser; a defrost air duct, the defrost air duct connecting the compressor compartment and the evaporator chamber; a first fan is arranged in the defrost air duct, and the first fan is controlled to start and transport the steam generated by the water receiving tray along the defrost air duct to the evaporator compartment.

[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] The related art utilizes the heat generated by the condenser and / or the compressor to heat the water in the water pan, converting it into steam to heat and defrost the evaporator, but the defrosting efficiency is slow.

[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 embodiment of the present disclosure provides a refrigeration device to improve defrosting efficiency.

[0009] According to an embodiment of the utility model, a refrigeration device is provided, comprising: a storage chamber, which is provided with a refrigeration air duct; an evaporator compartment, comprising an evaporator chamber and a defrost air duct arranged on the outside of the evaporator chamber, the evaporator chamber is connected to the refrigeration air duct, and an evaporator is arranged inside the evaporator chamber; a heating device, which is arranged in the evaporator chamber and is used for defrosting the evaporator; a fan chamber, which is arranged between the evaporator compartment and the refrigeration air duct, and a fan is arranged inside, including a fan damper; wherein, during refrigeration, the fan damper is in a first position, the fan chamber is connected to the evaporator chamber and the refrigeration air duct, the fan drives the air in the storage chamber to flow into the evaporator chamber, and after heat exchange with the evaporator, the air flows back into the storage chamber along the refrigeration air duct; during defrosting, the fan damper is in a second position, the fan chamber is connected to the defrost air duct, the fan drives the air in the fan chamber to flow into the evaporator chamber along the defrost air duct, and then returns to the fan chamber through the evaporator.

[0010] Optionally, the fan cavity further includes: a fan cover plate, covering the fan, including a first cover plate facing the evaporator compartment, the first cover plate is provided with an air guide port; wherein the air guide port is used to connect the fan cavity and the defrost air duct.

[0011] Optionally, a fan damper is arranged at the air guide port, and is used to open or close the air guide port; wherein, during cooling, the fan damper closes the air guide port; during defrosting, the fan damper opens the air guide port.

[0012] Optionally, the fan cover also includes: a second cover, arranged toward the refrigeration air duct, provided with an air supply outlet, the air supply outlet being used to connect the fan cavity and the refrigeration air duct; wherein the fan damper is configured to move between the air supply outlet and the air guide outlet, when cooling, the fan damper blocks the air guide outlet and exposes the air supply outlet; when defrosting, the fan damper blocks the air supply outlet and exposes the air guide outlet.

[0013] Optionally, the fan damper is a rotating structure, or the fan damper is a sliding structure.

[0014] Optionally, the evaporator compartment also includes: an evaporator cover plate, which is arranged in the refrigeration space of the refrigeration equipment, dividing the refrigeration space into a storage cavity and an evaporator compartment, including a top plate and side plates extending along the length direction of the evaporator, the top plate is arranged above the evaporator, and the side plates are connected to the top plate; a foam member, which is arranged on the inner side of the evaporator cover plate and surrounds the evaporator cavity, including a top wall and side walls connected to the top wall, the top wall is arranged below the top plate, and the side walls are arranged on the inner side of the side plates; wherein, a top air duct groove is provided on the side surface of the top wall facing away from the evaporator cavity, and the top air duct groove and the top plate surround a first defrost air duct; and / or, a side air duct groove is provided on the side surface of the side wall facing away from the evaporator cavity, and the side air duct groove and the side plate surround a second defrost air duct.

[0015] Optionally, the top air duct groove is recessed from the top plate toward the evaporator, and / or the side air duct groove is recessed from the side plate toward the evaporator.

[0016] Optionally, the evaporator cover is provided with at least one of an upper return air inlet and a side return air inlet, the upper return air inlet is provided on the top plate, and the side return air inlet is provided on the side plate, and the evaporator cabin also includes: a return air damper, provided on the evaporator cover, including at least one of an upper return air damper and a side return air damper; the upper return air damper is provided at the upper return air inlet, for opening or closing the upper return air inlet; the side return air damper is provided at the side return air inlet, for opening or closing the side return air inlet; wherein, during cooling, the return air damper is opened to expose the upper return air inlet and / or the side return air inlet; during defrosting, the return air damper is closed to block the upper return air inlet and / or the side return air inlet.

[0017] Optionally, the upper return air damper and / or the side return air damper is a sliding structure, or the upper return air damper and / or the side return air damper is a rotating structure.

[0018] Optionally, the top air duct groove and / or the side air duct groove are integrally formed with the foam piece.

[0019] The refrigeration equipment provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] When the evaporator is defrosted, on the basis of the heat conduction between the heating device and the evaporator, a fan and a defrost air duct are added. The fan drives the air in the fan cavity to flow into the evaporator cavity along the defrost air duct, and then returns to the fan cavity through the evaporator, so as to realize the air circulation of the evaporator compartment, so that the heat generated by the heating device is distributed more evenly, and 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 speed between the heating device and the evaporator, improves the defrost efficiency, reduces the opening time of the heating device, and saves electric energy. Moreover, the same fan is used in the refrigeration and defrosting processes, which reduces the number of fans and the number of times the fans are turned on and off, and reduces the difficulty of assembling the fan. By controlling the fan damper to switch between the first position and the second position, the opening or closing of the refrigeration air duct and the defrost air duct is controlled to meet the requirements of refrigeration and defrosting, and the influence of the defrosting process on the temperature in the storage cavity can also be reduced. In addition, the defrost air duct is arranged in the evaporator compartment, which can shorten the defrost path, speed up the defrost speed, reduce the occupation of the remaining space of the refrigeration equipment, and reduce the design difficulty of the defrost air 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, 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:

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

[0024] Figure 2 is 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] Fig. 9 is a schematic diagram of a refrigeration device provided by an embodiment of the present disclosure in a defrosting state;

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

[0033] Fig.11 is a schematic diagram of the structure of a foam member provided in an embodiment of the present disclosure;

[0034] Fig.12 It is a schematic diagram of the structure 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: cooling 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 plate; 342: side plate; 343: return air outlet; 35: foam member; 351: top wall; 3511: top air duct slot; 352: side wall; 3521: side air duct slot; 36: return air damper; 361: upper 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 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.

[0041] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments 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 for the disclosed embodiments described herein. In addition, the terms "including" and "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 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.

[0043] 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.

[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 indicates: A or B.

[0046] 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.

[0047] 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.

[0048] Combination Figures 1 to 12 As shown, the embodiment of the present disclosure provides a refrigeration device 10, including a storage chamber 20, an evaporator compartment 30, a heating device and a fan chamber 40. The storage chamber 20 is provided with a refrigeration air duct 21. The evaporator compartment 30 includes an evaporator chamber 31 and a defrosting air duct 32 provided outside the evaporator chamber 31. The evaporator chamber 31 is connected to the refrigeration air duct 21, and an evaporator 33 is provided inside the evaporator chamber 31. The heating device is provided in the evaporator chamber 31, and is used for defrosting the evaporator 33. The fan chamber 40 is provided between the evaporator compartment 30 and the refrigeration air duct 21, and a fan is provided inside the fan chamber 40, and the fan chamber 40 includes a fan damper 41. Among them, during cooling, the fan damper 41 is in the first position 411, the fan chamber 40 is connected to the evaporator chamber 31 and the refrigeration air duct 21, the fan drives the air in the storage chamber 20 to flow into the evaporator chamber 31, and after heat exchange with the evaporator 33, it flows back into the storage chamber 20 along the refrigeration air duct 21; during defrosting, the fan damper 41 is in the second position 412, the fan chamber 40 is connected to the defrost air duct 32, the fan drives the air in the fan chamber 40 to flow into the evaporator chamber 31 along the defrost air duct 32, and then returns to the fan chamber 40 through the evaporator 33.

[0049] When the evaporator 33 is defrosted by using the refrigeration device 10 provided by the embodiment of the present disclosure, a fan and a defrosting air duct 32 are added on the basis of the heat conduction between the heating device and the evaporator 33. The fan drives the air in the fan chamber 40 to flow into the evaporator chamber 31 along the defrosting air duct 32, and then returns to the fan chamber 40 through the evaporator 33, so as to realize the air circulation of the evaporator chamber 30, so that the heat generated by the heating device is distributed more evenly, and the heat transfer form is converted from the original single heat conduction to heat conduction and forced convection heat transfer, so as to accelerate the heat exchange speed between the heating device and the evaporator 33, improve the defrosting efficiency, reduce the opening time of the heating device, and save electric energy. Moreover, the same fan is used in the refrigeration and defrosting processes, so as to reduce the number of fans and the number of times the fans are turned on and off, and reduce the difficulty of assembling the fans. By controlling the fan damper 41 to switch between the first position 411 and the second position 412, the opening or closing of the refrigeration air duct 21 and the defrosting air duct 32 is controlled to meet the requirements of refrigeration and defrosting, and the influence of the defrosting process on the temperature in the storage chamber 20 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 .

[0050] 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, the evaporator and the condenser are connected by pipelines.

[0051] Optionally, combined Figures 8 to 12 As shown, the fan chamber 40 further includes a fan cover plate 42, and the fan cover plate 42 is provided with a fan. The fan cover plate 42 includes a first cover plate 421 facing the evaporator compartment 30, and the first cover plate 421 is provided with an air guide port 4211. The air guide port 4211 is used to connect the fan chamber 40 and the defrosting air duct 32.

[0052] In this way, the fan can drive air to flow from the air guide port 4211 of the first cover plate 421 into the defrost air duct 32, and then into the evaporator chamber 31 to defrost the evaporator 33, and finally return to the fan chamber 40 to achieve air circulation.

[0053] Optionally, the fan damper 41 is disposed at the air guide port 4211, and is used to open or close the air guide port 4211. In cooling, the fan damper 41 closes the air guide port 4211; in defrosting, the fan damper 41 opens the air guide port 4211.

[0054] 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 refrigeration, the fan damper 41 closes the air guide port 4211, and the fan drives the cold air in the evaporator chamber 31 to enter 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 to enter the evaporator chamber 31 along the defrost air duct 32, thereby accelerating the defrosting efficiency of the evaporator 33, realizing wind 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 electric energy.

[0055] Optionally, the fan cover plate 42 further includes a second cover plate 422, and the second cover plate 422 is arranged toward the refrigeration air duct 21. The second cover plate 422 is provided with an air supply port 4221, and the air supply port 4221 is used to connect the fan cavity 40 and the refrigeration air duct 21. The fan damper 41 is configured to move between the air supply port 4221 and the air guide port 4211. When cooling, the fan damper 41 blocks the air guide port 4211 and exposes the air supply port 4221; when defrosting, the fan damper 41 blocks the air supply port 4221 and exposes the air guide port 4211.

[0056] 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, the fan chamber 40 and the evaporator chamber 31 realize a new air circulation through the defrost air duct 32, and the heat generated during the defrosting process will not flow into the storage chamber 20 through the refrigeration air duct 21, thereby reducing the impact of the defrosting process on the temperature inside the storage chamber 20, thereby ensuring the freshness of the food stored in the storage chamber 20.

[0057] Optionally, the fan damper 41 is a rotating structure, or the fan damper 41 is a sliding structure.

[0058] When the fan damper 41 is a rotating structure, the fan damper 41 can rotate and move between a first position 411 for blocking the air guide outlet 4211 and a second position 412 for blocking the air supply outlet 4221 to meet the needs of refrigeration or defrosting; when the fan damper 41 is a sliding structure, the fan damper 41 can slide between a first position 411 for blocking the air guide outlet 4211 and a second position 412 for blocking the air supply outlet 4221 to meet the needs of refrigeration or defrosting.

[0059] 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 disposed in the refrigeration space of the refrigeration device 10 and is covered on the bottom wall of the inner tank 11 of the refrigeration device 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 a side plate 342 extending along the length direction of the evaporator 33, the top plate 341 is disposed above the evaporator 33, and the side plate 342 is connected to the top plate 341. The foam member 35 is disposed 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 disposed below the top plate 341, and the side wall 352 is disposed on the inner side of the side plate 342. Among them, a top air duct groove 3511 is provided on the side surface of the top wall 351 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 side surface of the side wall 352 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.

[0060] 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 .

[0061] 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 .

[0062] 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 .

[0063] 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.

[0064] Optionally, the top air duct groove 3511 is recessed from the top plate 341 toward the evaporator 33 , and / or the side air duct groove 3521 is recessed from the side plate 342 toward the evaporator 33 .

[0065] 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.

[0066] Optionally, the evaporator cover 34 is provided with at least one of an upper return air port 343 and a side return air port 343, the upper return air port 343 is provided on the top plate 341, and the side return air port 343 is provided on the side plate 342, and the evaporator compartment 30 further includes a return air damper 36, and the return air damper 36 is 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 port 343, and is used to open or close the upper return air port 343; the side return air damper 362 is provided on the side return air port 343, and is used to open or close the side return air port 343. In cooling, the return air damper 36 is opened to expose the upper return air port 343 and / or the side return air port 343; in defrosting, the return air damper 36 is closed to shield the upper return air port 343 and / or the side return air port 343.

[0067] 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 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.

[0068] 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.

[0069] 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, and 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 port 343 and the side return air port 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 are 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 port 343 to open or close the upper return air port 343, and the side return air damper 362 can be rotatably arranged on the side return air port 343 to open or close the side return air port 343.

[0070] Optionally, the top air duct groove 3511 and / or the side air duct groove 3521 are integrally formed with the foam piece 35 .

[0071] 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, thereby reducing the difficulty in designing the top air duct groove 3511 and / or the side air duct groove 3521.

[0072] The embodiment of the present disclosure provides a defrost control method for a refrigeration device 10 .

[0073] Optionally, the refrigeration device 10 further includes a controller, the controller includes a processor and a memory, the memory stores a control program, and the control program is used to implement the above-mentioned defrost control method when executed by the processor.

[0074] Combination Figure 2 As shown, the embodiment of the present disclosure provides a defrost control method for a refrigeration device 10, comprising:

[0075] 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;

[0076] 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.

[0077] After the compressor is turned off, the fan damper 41 is controlled to move and the heating device is started after waiting for a first preset time, such as 2 minutes. In this way, after the compressor is turned off and before the first preset time is reached, the fan can continue to transfer the remaining cold energy generated by the evaporator 33 to the storage chamber 20 of the refrigeration device 10, so as to make full use of the cold energy. It is understandable that the first preset time can also be zero.

[0078] According to the defrosting control method for the refrigeration device 10 provided by the embodiment of the present disclosure, when the evaporator 33 is defrosted, a fan and a defrosting air duct 32 are added on the basis of the heat conduction between the heating device and the evaporator 33, and the fan drives the air in the fan chamber 40 to flow into the evaporator chamber 31 along the defrosting air duct 32, and then returns to the fan chamber 40 through the evaporator 33, so as to realize the air circulation of the evaporator chamber 30, so that the heat generated by the heating device is distributed more evenly, and the heat transfer form is converted from the original single heat conduction to heat conduction and forced convection heat transfer, so as to accelerate the heat exchange speed between the heating device and the evaporator 33, improve the defrosting efficiency, reduce the opening time of the heating device, and save electric energy. Moreover, the same fan is used in the refrigeration and defrosting processes, so as to reduce the number of fans and the number of times the fans are turned on and off, and reduce the difficulty of assembling the fans. By controlling the movement position of the fan damper 41, the opening or closing of the refrigeration air duct 21 and the defrosting air duct 32 is controlled to meet the requirements of refrigeration and defrosting, and the influence of the defrosting process on the temperature in the storage chamber 20 of the refrigeration device 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 .

[0079] 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.

[0080] It is understandable that when a heating device such as a heating wire is powered on, it can generate a temperature of over 100 degrees Celsius, 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.

[0081] Optionally, the refrigeration device 10 further includes a temperature sensor.

[0082] Combination Figure 3 As shown, the embodiment of the present disclosure provides another defrost control method for a refrigeration device 10, comprising:

[0083] 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;

[0084] 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 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;

[0085] S303, the temperature sensor obtains the actual temperature of the evaporator chamber 31;

[0086] S304, when the actual temperature of the evaporator chamber 31 is greater than the preset defrosting temperature, the controller controls the heating device to be turned off;

[0087] S305: After the second preset time, the controller controls the compressor to start.

[0088] In this way, the refrigeration device 10 is controlled to end defrosting according to the actual temperature of the evaporator chamber 31. When the actual temperature of the evaporator chamber 31 is greater than the preset defrosting temperature, the heating device is controlled to be turned off to save electric energy. After the heating device is turned off, the temperature in the evaporator chamber 31 is high, the residual frost layer on the evaporator 33 continues to melt, and the defrosting water continues to be discharged from the evaporator chamber 30. After the second preset time, such as 3 minutes, the compressor starts to compress the refrigerant for the refrigeration cycle. It can be understood that the second preset time can also be zero, that is, when the heating device is turned off, there is no need to wait and the compressor is directly started.

[0089] Optionally, when the actual temperature of the evaporator chamber 31 is greater than a preset defrosting temperature, the defrosting control method further includes controlling the fan to be turned off.

[0090] 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, dry the water droplets on the evaporator 33, speed up the defrost efficiency, and then the controller controls the fan to be turned off.

[0091] 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 .

[0092] Combination Figure 4 As shown, the embodiment of the present disclosure provides another defrost control method for a refrigeration device 10, comprising:

[0093] 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;

[0094] S402, 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;

[0095] S403, the temperature sensor obtains the actual temperature of the evaporator chamber 31;

[0096] 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;

[0097] S405, after the second preset time, the controller controls the compressor to start;

[0098] 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.

[0099] 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 is sent into the refrigeration duct 21 through the fan, flows into the storage cavity 20 from the air outlet of the refrigeration duct 21 and cools the items in the storage cavity 20 to achieve refrigeration. The cold energy will not flow into the defrost duct 32, 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 humid hot water vapor in the evaporator cavity 31 can condense on the evaporator 33 to avoid condensation on the fan, which causes the fan to freeze and affects the normal operation of the refrigeration device 10. It is understandable that the third preset time can also be zero.

[0100] Optionally, a defrost damper (not shown in the figure) is provided at the connection 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.

[0101] 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 is arranged at the first end 323 , and the defrost damper is arranged at the second end 324 .

[0102] Combination Figure 5 As shown, the embodiment of the present disclosure provides another defrost control method for a refrigeration device 10, comprising:

[0103] 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;

[0104] 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 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;

[0105] S503, the temperature sensor obtains the actual temperature of the evaporator chamber 31;

[0106] 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;

[0107] S505, after the second preset time, the controller controls the compressor to start;

[0108] 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;

[0109] 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 .

[0110] 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.

[0111] 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 a third preset time, the defrost control method further includes controlling the return air damper 36 to move to open the return air port 343 .

[0112] Combination Figure 6 As shown, the embodiment of the present disclosure provides another defrost control method for a refrigeration device 10, comprising:

[0113] 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;

[0114] S602, 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;

[0115] S603, the temperature sensor obtains the actual temperature of the evaporator chamber 31;

[0116] 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;

[0117] S605, after the second preset time, the controller controls the compressor to start;

[0118] S606, 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;

[0119] S607 , the controller controls the return air damper 36 to move to open the return air port 343 .

[0120] 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 heat exchange with the evaporator 33, enter the refrigeration air duct 21 through the fan chamber 40, and then flow back into the storage chamber 20 from the air outlet of the refrigeration air duct 21, thereby realizing an air cooling cycle.

[0121] Optionally, acquiring the actual temperature of the evaporator chamber 31 includes acquiring the actual temperature of the evaporator chamber 31 after a fourth preset time.

[0122] 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.

[0123] Optionally, acquiring the actual temperature of the evaporator chamber 31 includes acquiring the actual temperature of the evaporator chamber 31 in real time.

[0124] In this way, the actual temperature of the evaporator chamber 31 can be monitored in real time, defrosting can be terminated in time, and electric energy can be saved.

[0125] 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.

[0126] 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.

[0127] 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 .

[0128] Combination Figure 7 As shown, the embodiment of the present disclosure provides another defrost control method for a refrigeration device 10, comprising:

[0129] 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;

[0130] S702, the controller controls the return air damper 36 to move to close the return air port 343;

[0131] 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.

[0132] In this way, closing the return air vent 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 vent 343, and avoid frequent heating and cooling that leads to a decrease in the moisture content and freshness of the food.

[0133] 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 refrigeration device, It is characterized in that include: The storage cavity is provided with a cooling air duct; The evaporator compartment comprises an evaporator chamber and a defrosting air duct arranged outside the evaporator chamber, the evaporator chamber is connected with the refrigeration air duct, and an evaporator is arranged inside the evaporator chamber; A heating device, arranged in the evaporator cavity, for defrosting the evaporator; The fan chamber is arranged between the evaporator compartment and the refrigeration air duct, and a fan is arranged inside, including a fan damper; Among them, during cooling, the fan damper is in the first position, the fan cavity is connected to the evaporator cavity and the refrigeration air duct, the fan drives the air in the storage cavity to flow into the evaporator cavity, and after heat exchange with the evaporator, it flows back into the storage cavity along the refrigeration air duct; during defrosting, the fan damper is in the second position, the fan cavity is connected to the defrost air duct, the fan drives the air in the fan cavity to flow into the evaporator cavity along the defrost air duct, and then returns to the fan cavity through the evaporator.

2. The refrigeration device according to claim 1, It is characterized in that The fan cavity also includes: A fan cover plate, covering the fan, comprises a first cover plate facing the evaporator compartment, and the first cover plate is provided with an air guide port; Among them, the air guide port is used to connect the fan cavity and the defrost air duct.

3. The refrigeration device according to claim 2, It is characterized in that The fan damper is arranged at the air guide port and is used to open or close the air guide port; During cooling, the fan damper closes the air duct; during defrosting, the fan damper opens the air duct.

4. The refrigeration device according to claim 3, It is characterized in that The fan cover also includes: The second cover plate is arranged toward the refrigeration air duct and is provided with an air supply port, and the air supply port is used to connect the fan cavity and the refrigeration air duct; Among them, the fan damper is configured to move between the air supply port and the air guide port. During cooling, the fan damper blocks the air guide port and exposes the air supply port; during defrosting, the fan damper blocks the air supply port and exposes the air guide port.

5. The refrigeration device according to claim 4, It is characterized in that The fan damper is a rotating structure, or the fan damper is a sliding structure.

6. The refrigeration device according to any one of claims 1 to 4, It is characterized in that The evaporator compartment also includes: The evaporator cover plate is arranged in the refrigeration space of the refrigeration equipment, and divides the refrigeration space into a storage cavity and an evaporator compartment, and comprises a top plate and side plates extending along the length direction of the evaporator, the top plate is arranged above the evaporator, and the side plates are connected to the top plate; The foam member is arranged on the inner side of the evaporator cover plate and surrounds the evaporator cavity, including a top wall and a side wall connected to the top wall, wherein the top wall is arranged below the top plate and the side wall is arranged on the inner side of the side plate; Among them, a top air duct groove is provided on the surface of the top wall on one side facing away from the evaporator cavity, and the top air duct groove and the top plate enclose a first defrost air duct; and / or, a side air duct groove is provided on the surface of the side wall on one side facing away from the evaporator cavity, and the side air duct groove and the side plate enclose a second defrost air duct.

7. The refrigeration device according to claim 6, It is characterized in that The top air duct groove is recessed from the top plate toward the evaporator, and / or the side air duct groove is recessed from the side plate toward the evaporator.

8. The refrigeration device according to claim 6, It is characterized in that The evaporator cover plate is provided with at least one of an upper return air port and a side return air port, the upper return air port is provided on the top plate, and the side return air port is provided on the side plate. The evaporator cabin also includes: The return air damper is arranged on the evaporator cover plate, and includes at least one of an upper return air damper and a side return air damper; the upper return air damper is arranged at the upper return air inlet, and is used to open or close the upper return air inlet; the side return air damper is arranged at the side return air inlet, and is used to open or close the side return air inlet; During cooling, the return air damper is opened to expose the upper return air inlet and / or the side return air inlet; during defrosting, the return air damper is closed to block the upper return air inlet and / or the side return air inlet.

9. The refrigeration device according to claim 8, It is characterized in that The upper return air damper and / or the side return air damper are of sliding structure, or the upper return air damper and / or the side return air damper are of rotating structure.

10. The refrigeration device according to claim 6, It is characterized in that The top air duct groove and / or the side air duct groove are integrally formed with the foam piece.

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