Refrigerator

Abstract

The embodiment of the utility model relates to the technical field of household appliances, in particular to a refrigerator. The refrigerator comprises a refrigerator body; the evaporator is arranged in the box body; the evaporator comprises a fixed plate, a thick film heater, a heat exchange tube and heat exchange fins; the heat exchange pipes are connected to the fixing plates correspondingly and communicate with one another. The heat exchange fins are fixed on the heat exchange tubes; the thick film heater exchanges heat with the heat exchange fins, the thick film heater is provided with through holes, the through holes correspond to the heat exchange pipes, and the heat exchange pipes are arranged in the corresponding through holes in a penetrating mode respectively. The thick film heater can be embedded into the heat exchange tube, namely is located between the multiple heat exchange fins fixed to the heat exchange tube and can make full contact with the heat exchange fins at the upper end and the lower end of the evaporator, the upper end and the lower end of the evaporator can be deiced comprehensively, the heating surface of the thick film heater is uniform, the heating rate of the thick film heater is high, and the heating efficiency is high. Defrosting of the evaporator can be conducted more rapidly and comprehensively, the defrosting efficiency is improved, the refrigeration waiting time of the refrigerator is shortened, and low-temperature storage of food is guaranteed.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of household appliance technology, and in particular, to a refrigerator. Background Art

[0002] A refrigerator is a refrigeration device that keeps a constant low temperature. It is also a civilian product that keeps food or other items at a constant low temperature. The evaporator is the main heat exchange device in the refrigerator. The low-temperature refrigerant exchanges heat with the outside air through the evaporator, vaporizes and absorbs heat to achieve the cooling effect.

[0003] When the refrigerator is working, frost will condense on the heat dissipation fins of the evaporator. As the thickness of the frost increases, the heat exchange efficiency of the evaporator will be reduced and the energy consumption will increase. In order to reduce the impact of frost on the heat exchange efficiency of the refrigerator, in the prior art, a tubular heater is often used to defrost the evaporator.

[0004] However, in the related art, the tubular heater is usually placed at the lower end of the evaporator, and the ice on the evaporator is melted by relying on the heat dissipation of the tubular heater. Therefore, the defrosting efficiency of the tubular heater becomes worse as it moves to the upper end of the evaporator, and the heating tube may dry-burn for a long time. Utility Model Content

[0005] The embodiment of the present application provides a refrigerator that can simultaneously defrost the upper and lower ends of an evaporator, thereby improving the defrosting efficiency of the evaporator.

[0006] In a first aspect, an embodiment of the present application provides a refrigerator, comprising:

[0007] Box;

[0008] An evaporator, wherein the evaporator is arranged in the box;

[0009] The evaporator includes a fixed plate, a thick film heater, a plurality of heat exchange tubes and heat exchange fins; the plurality of heat exchange tubes are respectively connected to the fixed plate, and the plurality of heat exchange tubes are interconnected; the heat exchange fins are fixed on the heat exchange tubes; the thick film heater exchanges heat with the heat exchange fins, and the thick film heater is provided with perforations corresponding to the heat exchange tubes, and the plurality of heat exchange tubes are respectively inserted into the corresponding perforations.

[0010] In this way, the thick film heater can be embedded in the heat exchange tube, that is, located between multiple heat exchange fins fixed on the heat exchange tube, and can fully contact the heat exchange fins at the upper and lower ends of the evaporator, so as to achieve comprehensive de-icing of the upper and lower ends of the evaporator. Moreover, the thick film heater has a uniform heating surface and a fast heating rate, so the evaporator can be defrosted more quickly and comprehensively, thereby improving the defrosting efficiency, shortening the refrigeration waiting time of the refrigerator, and ensuring the low-temperature storage of food.

[0011] In some embodiments of the present application, the thick film heater includes a thick film heating plate, a mounting rear plate and a mounting cover plate. The thick film heating plate is configured to generate heat evenly. The mounting cover plate is connected to the mounting rear plate to accommodate and fix the thick film heating plate. Perforations are provided on the mounting cover plate and the mounting rear plate.

[0012] In this way, by arranging the mounting cover plate and the mounting rear plate, the thick film heating plate can be installed and fixed, and the thick film heating plate can be protected to prevent damage caused by bumps.

[0013] In some embodiments of the present application, the thick film heating plate includes a thick film routing board and thick film wiring, the thick film wiring is arranged on the thick film routing board, and the thick film routing board is provided with a via hole, and the via hole is opposite to the through hole.

[0014] In this way, the thick film heating plate is simple in configuration, low in cost, and convenient in processing.

[0015] In some embodiments of the present application, thick film wiring is evenly arranged around a plurality of via holes.

[0016] In this way, the thick film wiring heats the area near the via hole evenly.

[0017] In some embodiments of the present application, a plurality of heat exchange fins are arranged in parallel.

[0018] In this way, the heat exchange efficiency of the heat exchange fins is better, which can improve the efficiency of the evaporator.

[0019] In some embodiments of the present application, the thick film heater and the heat exchange fins are parallel to each other.

[0020] In this way, the thick film heater can heat the parallel heat exchange fins more evenly.

[0021] In some embodiments of the present application, the thick film heater includes a plurality of thick film heaters, and the plurality of thick film heaters are arranged at intervals.

[0022] In this way, multiple thick film heaters can evenly heat the heat exchange fins at different positions.

[0023] In some embodiments of the present application, a plurality of thick film heaters are evenly arranged.

[0024] In this way, the heat exchange fins can be heated more evenly.

[0025] In some embodiments of the present application, in the length direction of the heat exchange tube, the orthographic projection of the thick film heater covers the orthographic projection of the heat exchange fin.

[0026] In this way, the heat exchange fins can be completely covered by the thick film heater, thereby improving the defrosting efficiency of the evaporator.

[0027] In a second aspect, an embodiment of the present application provides a refrigerator, comprising a box body and an evaporator, wherein the evaporator is disposed in the box body;

[0028] The evaporator includes a fixed plate, a thick film heater, a plurality of heat exchange tubes and heat exchange fins; the plurality of heat exchange tubes are used to be connected to the fixed plate, and the plurality of heat exchange tubes are interconnected; the heat exchange fins are fixed on the heat exchange tubes; the thick film heater is used to heat the heat exchange fins, and the thick film heater is provided with perforations corresponding to the heat exchange tubes, and the plurality of perforations are used for the corresponding heat exchange tubes to pass through.

[0029] In this way, the thick film heater can be embedded in the heat exchange tube, that is, located between multiple heat exchange fins fixed on the heat exchange tube, and can fully contact the heat exchange fins at the upper and lower ends of the evaporator, so as to achieve comprehensive de-icing of the upper and lower ends of the evaporator. Moreover, the thick film heater has a uniform heating surface and a fast heating rate, so the evaporator can be defrosted more quickly and comprehensively, thereby improving the defrosting efficiency, shortening the refrigeration waiting time of the refrigerator, and ensuring the low-temperature storage of food. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0031] Figure 1 One of the structural schematic diagrams of the evaporator provided in the embodiment of the present application;

[0032] Figure 2 The second structural schematic diagram of the evaporator provided in the embodiment of the present application;

[0033] Figure 3 for Figure 1 A side view of the evaporator shown;

[0034] Figure 4 for Figure 1 A front view of the evaporator shown;

[0035] Figure 5 for Figure 1 A top view of the evaporator shown;

[0036] Figure 6 for Figure 1 One of the structural schematic diagrams of the thick film heater of the evaporator shown;

[0037] Figure 7 for Figure 1 The second structural schematic diagram of the thick film heater of the evaporator shown;

[0038] Figure 8 for Figure 6 An exploded schematic diagram of a thick film heater is shown;

[0039] Fig. 9 for Figure 7 An exploded schematic diagram of a thick film heater is shown;

[0040] Fig.10 for Figure 6 A front view of a thick film heating plate of the thick film heater shown.

[0041] Description of reference numerals:

[0042] 100-evaporator; 10-fixed plate; 20-heat exchange tube; 21-liquid inlet; 22-liquid outlet; 30-heat exchange fin; 40-thick film heater; 41-perforation; 42-thick film heating plate; 421-thick film wiring board; 422-thick film wiring; 423-tube hole; 43-mounting rear plate; 431-mounting groove; 44-mounting cover plate; 50-connecting pipe. DETAILED DESCRIPTION

[0043] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0044] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0045] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0046] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0047] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] A refrigerator is a refrigeration device that maintains a constant low temperature, and is also a civilian product that keeps food or other items at a constant low temperature. The evaporator 100 is the main heat exchange device in the refrigerator. The low-temperature condensed liquid passes through the evaporator 100 and exchanges heat with the outside air, vaporizing and absorbing heat to achieve a refrigeration effect.

[0051] When the refrigerator is working, frost will condense on the heat dissipation fins of the evaporator 100. As the thickness of the frost increases, the heat exchange efficiency of the evaporator 100 will be directly reduced and the energy consumption will increase. In order to reduce the impact of frost on the heat exchange efficiency of the refrigerator, in the prior art, a tubular heater is often used to defrost the evaporator 100.

[0052] However, in the related art, the tubular heater is usually placed at the lower end of the evaporator 100, and the ice on the evaporator 100 is melted by relying on the heat dissipation of the tubular heater. Therefore, the defrosting efficiency of the tubular heater becomes worse as it moves to the upper end of the evaporator 100, and the heating tube may dry-burn for a long time.

[0053] After repeated thinking and verification, the inventors found that if the tubular heater is replaced with a thick film heater 40, the thick film heater 40 can be embedded in the evaporator 100 to make full contact with the heat exchange fins 30 at the upper and lower ends of the evaporator 100, so that the upper and lower ends of the evaporator 100 can be fully de-iced and the defrosting efficiency can be improved. In addition, the thick film heater 40 has a uniform heating surface, a large heating area, and a high heating efficiency. The thick film heater 40 has a fast heating rate, so the evaporator 100 can be defrosted more quickly and comprehensively, shortening the refrigeration waiting time of the refrigerator and ensuring the low-temperature storage of food.

[0054] In view of this, the present application provides an evaporator 100, comprising: a box body; an evaporator 100, wherein the evaporator 100 is arranged in the box body; the evaporator 100 comprises a fixed plate 10, a thick film heater 40, a plurality of heat exchange tubes 20 and heat exchange fins 30; the plurality of heat exchange tubes 20 are respectively connected to the fixed plate 10, and the plurality of heat exchange tubes 20 are interconnected; the heat exchange fins 30 are fixed on the heat exchange tubes 20; the thick film heater 40 performs heat exchange with the heat exchange fins 30, and a through hole 41 is provided on the thick film heater 40, and the through hole 41 corresponds to the heat exchange tube 20, and the plurality of heat exchange tubes 20 are respectively penetrated in the corresponding through holes 41.

[0055] By sleeved on the heat exchange tube 20, the thick film heater 40 can be arranged between the plurality of heat exchange fins 30, and can make full contact with the heat exchange fins 30 at the upper and lower ends of the evaporator 100, so that the upper and lower ends of the evaporator 100 can be fully de-iced, and the thick film heater 40 has a uniform heating surface and a fast heating rate, so that the evaporator 100 can be defrosted more quickly and fully, thereby improving the defrosting efficiency, shortening the refrigeration waiting time of the refrigerator, and ensuring the low-temperature storage of food.

[0056] Figure 1 This is one of the structural schematic diagrams of the evaporator provided in the embodiment of the present application. Figure 2 This is the second structural schematic diagram of the evaporator provided in the embodiment of the present application. Figure 3 for Figure 1 Side view of the evaporator shown. Figure 4 for Figure 1 A front view of the evaporator is shown. Figure 5 for Figure 1 A top view of the evaporator is shown. Figure 6 for Figure 1 One of the structural schematic diagrams of the thick film heater of the evaporator shown. Figure 7 for Figure 1 The second schematic diagram of the structure of the thick film heater of the evaporator shown. Figure 8 for Figure 6 Exploded schematic diagram of a thick film heater shown. Fig. 9 for Figure 7 Exploded schematic diagram of a thick film heater shown. Fig.10 for Figure 6 A front view of a thick film heating plate of the thick film heater shown.

[0057] like Figure 1 and Figure 2 As shown, the evaporator 100 provided in the embodiment of the present application includes a fixing plate 10, a heat exchange tube 20, a heat exchange fin 30 and a thick film heater 40. The fixing plate 10 is used to fix the evaporator 100. The heat exchange tube 20 is arranged on the fixing plate 10. The heat exchange tube 20 is used for the flow of refrigerant to exchange heat. The heat exchange fin 30 is arranged on the heat exchange tube 20. The heat exchange fin 30 is used to expand the heat exchange area of ​​the heat exchange tube 20, thereby improving the efficiency of the evaporator 100. The thick film heater 40 is arranged on the heat exchange tube 20. The thick film heater 40 is used to heat the heat exchange fin 30, remove frost outside the heat exchange fin 30, and thus reduce the influence of frost on the heat exchange efficiency of the evaporator 100.

[0058] In some embodiments, the fixing plates 10 include two fixing plates 10. The two fixing plates 10 are arranged opposite to each other.

[0059] Both ends of the heat exchange tube 20 are fixedly connected to the corresponding fixing plates 10 . The heat exchange tube 20 is fixed between the two fixing plates 10 .

[0060] Correspondingly, the heat exchange fins 30 and the thick film heater 40 are respectively located between the two fixing plates 10 .

[0061] The two fixing plates 10 are provided to improve the structural stability of the evaporator 100 and prevent the evaporator 100 from being deformed.

[0062] Exemplarily, the two fixing plates 10 are disposed symmetrically along the horizontal direction.

[0063] like Figures 3 to 5 As shown, in some embodiments, the heat exchange tube 20 includes a plurality of heat exchange tubes 20. The plurality of heat exchange tubes 20 are respectively connected to the fixing plate 10, and the plurality of heat exchange tubes 20 are interconnected.

[0064] like Figure 4 and Figure 5 As shown, in some embodiments, the heat exchange tubes 20 are arranged horizontally, two heat exchange tubes 20 form a row, and multiple rows of heat exchange tubes 20 are arranged up and down in the height direction.

[0065] In some embodiments, the two heat exchange tubes 20 in each row are opposite to the two heat exchange tubes 20 in an adjacent row.

[0066] In some embodiments, the intervals between the multiple rows of heat exchange tubes 20 along the height direction are the same, that is, the multiple rows of heat exchange tubes 20 are evenly arranged along the height direction.

[0067] In some embodiments, the plurality of heat exchange tubes 20 are arranged in a matrix.

[0068] The heat exchange tubes 20 evenly arranged in a matrix can improve the heat exchange efficiency of the evaporator 100 .

[0069] In some embodiments, the evaporator 100 further includes a connecting pipe 50. The connecting pipe 50 is disposed on the heat exchange tube 20. The connecting pipe 50 is used to connect adjacent heat exchange tubes 20.

[0070] In some embodiments, the heat exchange tube 20 further includes a liquid inlet 21 and a liquid outlet 22. The liquid inlet 21 is used for the inflow of refrigerant, and the liquid outlet 22 is used for the outflow of refrigerant.

[0071] In some embodiments, the liquid inlet 21 and the liquid outlet 22 are respectively located at one end of the top row of heat exchange tubes 20. The heat exchange tubes 20 in the upper and lower rows that are opposite to each other are connected by a connecting tube 50. At one end of the bottom row of heat exchange tubes 20, two heat exchange tubes 20 are connected by a connecting tube 50.

[0072] In this way, the plurality of heat exchange tubes 20 can be connected to each other through the connecting tube 50 .

[0073] In some embodiments, the heat exchange fins 30 are fixed on the heat exchange tubes 20 .

[0074] In some embodiments, two heat exchange tubes 20 in each row share a heat exchange fin 30 .

[0075] It is understandable that in other embodiments, the heat exchange fins 30 can also be arranged as follows: a heat exchange fin 30 is arranged separately on the heat exchange tube 20, or multiple heat exchange tubes 20, such as two or all heat exchange tubes 20 share the heat exchange fin 30, or all heat exchange tubes 20 share the heat exchange fin 30.

[0076] In some embodiments, a plurality of heat exchange fins 30 in each row are arranged in parallel.

[0077] In some embodiments, the intervals between the multiple heat exchange fins 30 in each row are the same, that is, the multiple heat exchange fins 30 are evenly arranged.

[0078] In some embodiments, the plurality of heat exchange fins 30 in each row are respectively opposite to the plurality of heat exchange fins 30 in an adjacent row.

[0079] In some embodiments, the intervals between the multiple rows of heat exchange fins 30 along the height direction are the same, that is, the multiple rows of heat exchange fins 30 are evenly arranged along the height direction.

[0080] The evenly arranged heat exchange fins 30 have a better heat exchange efficiency, and can improve the heat exchange efficiency of the evaporator 100 .

[0081] like Figure 6As shown, in some embodiments, the thick film heater 40 is provided with a through hole 41 , the number of the through holes 41 is consistent with the number of the heat exchange tubes 20 , and the positions of the through holes 41 correspond to the positions of the heat exchange tubes 20 , and the plurality of heat exchange tubes 20 are respectively penetrated in the corresponding through holes 41 .

[0082] The provision of the through hole 41 facilitates fixing the thick film heater 40 on the heat exchange tube 20, thereby preventing the thick film heater 40 from moving and improving the defrosting efficiency.

[0083] In some embodiments, the height dimension of the thick film heater 40 is greater than the overall height dimension of the heat exchange fins 30 , so that more heat can be provided to the heat exchange fins 30 .

[0084] In some embodiments, the width dimension of the thick film heater 40 is larger than the overall width dimension of the heat exchange fin 30 , so that more heat can be provided to the heat exchange fin 30 .

[0085] In some embodiments, in the length direction of the heat exchange tube 20, the orthographic projection of the thick film heater 40 covers the orthographic projection of the heat exchange fin 30. That is, the height dimension of the thick film heater 40 is larger than the overall height dimension of the heat exchange fin 30, and the width dimension of the thick film heater 40 is larger than the overall width dimension of the heat exchange fin 30. Thus, the heat exchange fin 30 is completely covered by the thick film heater 40, thereby improving the defrosting efficiency of the evaporator 100.

[0086] In some embodiments, the thick film heater 40 and the heat exchange fins 30 are parallel to each other.

[0087] In some embodiments, the thick film heater 40 includes a plurality of thick film heaters 40. Between the two fixing plates 10, the plurality of thick film heaters 40 are arranged at intervals.

[0088] In some embodiments, the plurality of thick film heaters 40 are evenly arranged and evenly disposed between the heat exchange fins 30 along the length direction of the heat exchange tube 20 , so that the heat exchange fins 30 can be evenly heated.

[0089] Specifically, the number of thick film heaters 40 to be provided may be determined according to the size of the evaporator 100 and the power of the thick film heater 40 .

[0090] like Figures 7 to 9 As shown, the thick film heater 40 includes a thick film heating plate 42, a mounting rear plate 43 and a mounting cover plate 44. The thick film heating plate 42 is used to generate heat, thereby heating the heat exchange fins 30. The mounting cover plate 44 is connected to the mounting rear plate 43 to accommodate the thick film heating plate 42, and the mounting rear plate 43 and the mounting cover plate 44 are used to fix the thick film heating plate 42. The mounting rear plate 43 and the mounting cover plate 44 are provided with through holes 41.

[0091] The mounting cover plate 44 and the mounting rear plate 43 accommodate and fix the thick film heating plate 42, so as to protect the thick film heating plate 42 and prevent it from being damaged by collision.

[0092] The thick film heating plate 42 is used to generate heat evenly, thereby ensuring that the upper and lower ends of the evaporator 100 are fully de-iced.

[0093] Specifically, the mounting rear plate 43 is provided with a mounting groove 431 . The thick film heating plate 42 is arranged in the mounting groove 431 . The mounting cover plate 44 covers the mounting groove 431 , so as to fix the thick film heating plate 42 in the mounting groove 431 .

[0094] like Fig. 9 and Fig.10 As shown, in some embodiments, the thick film heating plate 42 includes a thick film wiring board 421 and a thick film wiring 422. The thick film wiring board 421 is disposed in the mounting groove 431. The thick film wiring 422 is disposed on the thick film wiring board 421. The thick film wiring 422 is used to generate heat to realize the heating function of the thick film heating plate 42.

[0095] The thick film heating plate 42 is wired on the thick film wiring plate 421, so the structure is simple, the cost is low, and the processing is convenient.

[0096] The thick film wiring board 421 is provided with a tube hole 423, which is opposite to the through hole 41. The tube hole 423 is used for the heat exchange tube 20 to pass through, so that the thick film wiring board 421 is arranged on the heat exchange tube 20.

[0097] In some embodiments, the thick film wiring 422 is evenly arranged around the plurality of through-tube holes 423 , so as to evenly heat the heat exchange tubes 20 disposed in the through-tube holes 423 .

[0098] Taking into account the different probabilities and sequences of frost condensation on the heat exchange fins 30 at different heights, the setting of the thick film wiring 422 can also be adjusted accordingly, so that the thick film wiring 422 is arranged more densely in places where more frost condenses, and the thick film wiring 422 is arranged more sparsely in places where less frost condenses, thereby performing differentiated heating on the heat exchange fins 30 at different heights and further improving the defrosting efficiency.

[0099] During defrosting operation, the thick film wiring 422 generates heat driven by an external power source, so that the thick film wiring board 421 dissipates heat evenly, and the thick film heater 40 evenly heats the heat exchange fins 30 so that the heat exchange fins 30 at the upper and lower ends are evenly heated and de-iced.

[0100] In some embodiments, the evaporator 100 further includes a controller, a sensor, and a power supply. The power supply is electrically connected to the thick film wiring 422. The sensor is disposed on the thick film heater 40. The controller is communicatively connected to the sensor and the power supply. The controller can control the start and stop of the power supply according to the sensing result of the sensor, thereby preventing the thick film heater 40 from continuing to operate after defrosting is completed, thereby wasting electric energy.

[0101] The evaporator 100 provided in the embodiment of the present application includes a fixed plate 10, a plurality of heat exchange tubes 20, heat exchange fins 30 and a thick film heater 40. The plurality of heat exchange tubes 20 are respectively connected to the fixed plate 10, and the plurality of heat exchange tubes 20 are interconnected; the heat exchange fins 30 are fixed on the heat exchange tubes 20; the thick film heater 40 is configured to heat the heat exchange fins 30, and a through hole 41 is provided on the thick film heater 40, and the through hole 41 corresponds to the heat exchange tube 20, and the plurality of heat exchange tubes 20 are respectively penetrated in the corresponding through holes 41.

[0102] By embedding the thick film heater 40 into the heat exchange tube 20 and positioning the thick film heater 40 between the plurality of heat exchange fins 30 , the heat exchange fins 30 at the upper and lower ends of the evaporator 100 can be fully contacted, thereby achieving full de-icing of the upper and lower ends of the evaporator 100 . In addition, the thick film heater 40 has a uniform heating surface and a fast heating rate, so the evaporator 100 can be defrosted more quickly and fully, thereby improving the defrosting efficiency, shortening the refrigeration waiting time of the refrigerator, and ensuring low-temperature storage of food.

[0103] In addition, an embodiment of the present application further provides a refrigerator, including a box body and an evaporator 100, wherein the evaporator 100 is disposed in the box body.

[0104] The specific structure, working principle and function of the evaporator 100 have been described in detail in the above embodiments and will not be repeated here.

[0105] The refrigerator provided in the present application embeds a thick film heater 40 into the heat exchange tube 20 so that the thick film heater 40 is located between a plurality of heat exchange fins 30, thereby being able to make full contact with the heat exchange fins 30 at the upper and lower ends of the evaporator 100, thereby achieving full de-icing of the upper and lower ends of the evaporator 100. Moreover, the thick film heater 40 has a uniform heating surface and a fast heating rate, so that the evaporator 100 can be defrosted more quickly and fully, thereby improving the defrosting efficiency, shortening the refrigeration waiting time of the refrigerator, and ensuring low-temperature storage of food.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0107] For ease of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are intended to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A refrigerator, characterized in that: include: Box; an evaporator, the evaporator being arranged in the box; The evaporator includes a fixed plate, a thick film heater, a plurality of heat exchange tubes and heat exchange fins; the plurality of heat exchange tubes are respectively connected to the fixed plate, and the plurality of heat exchange tubes are interconnected; the heat exchange fins are fixed on the heat exchange tubes; the thick film heater exchanges heat with the heat exchange fins, the thick film heater is provided with perforations, the perforations correspond to the heat exchange tubes, and the plurality of heat exchange tubes are respectively inserted into the corresponding perforations.

2. The refrigerator according to claim 1, characterized in that: The thick film heater comprises a thick film heating plate, a mounting rear plate and a mounting cover plate. The thick film heating plate is configured to generate heat evenly. The mounting cover plate is connected to the mounting rear plate to accommodate and fix the thick film heating plate. The through holes are provided on the mounting cover plate and the mounting rear plate.

3. The refrigerator according to claim 2, characterized in that: The thick film heating plate comprises a thick film wiring board and a thick film wiring, wherein the thick film wiring is arranged on the thick film wiring board, and the thick film wiring board is provided with a via hole, wherein the via hole is opposite to the through hole.

4. The refrigerator according to claim 3, characterized in that: The thick film wiring is evenly arranged around the plurality of via holes.

5. The refrigerator according to claim 1, characterized in that: A plurality of heat exchange fins are arranged in parallel.

6. The refrigerator according to claim 1, characterized in that: The thick film heater and the heat exchange fins are parallel to each other.

7. The refrigerator according to claim 1, characterized in that: The thick film heater comprises a plurality of thick film heaters, and the plurality of thick film heaters are arranged at intervals.

8. The refrigerator according to claim 7, characterized in that: The plurality of thick film heaters are evenly arranged.

9. The refrigerator according to claim 1, characterized in that: In the length direction of the heat exchange tube, the orthographic projection of the thick film heater covers the orthographic projection of the heat exchange fin.

10. A refrigerator, characterized in that: It comprises a box body and an evaporator, wherein the evaporator is arranged in the box body; The evaporator includes a fixed plate, a thick film heater, a plurality of heat exchange tubes and heat exchange fins; the plurality of heat exchange tubes are used to be connected to the fixed plate, and the plurality of heat exchange tubes are interconnected; the heat exchange fins are fixed on the heat exchange tubes; the thick film heater is used to heat the heat exchange fins, and the thick film heater is provided with perforations, which correspond to the heat exchange tubes, and the plurality of perforations are used for the corresponding heat exchange tubes to pass through.

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