Automatic defrosting device for refrigerator evaporator

Abstract

The utility model provides a refrigerator evaporator automatic defrosting device which comprises a refrigerator body and an evaporator installed in the refrigerator body and further comprises a defrosting device and a blower device, and the defrosting device is used for being installed on the inner wall of the refrigerator body and used for defrosting the evaporator; the water pan is installed at the bottom of the defrosting device and used for receiving falling frost and defrosting water. The water pan is installed at the bottom of the defrosting device and used for receiving falling frost and defrosting water. Wherein the air blowing device comprises an air blower and an exhaust pipe connected to the air blower, and the air blower is used for introducing external air into the refrigerator body through the exhaust pipe; the defrosting device can solve the problems that after a defrosting device in the prior art melts a frost layer on an evaporator, part of defrosting water can remain on the surfaces of fins, the surface of the evaporator is frosted again, and the defrosting effect is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of defrosting, in particular to an automatic defrosting device for a refrigerator evaporator. Background Art

[0002] The refrigerator uses the throttling cold effect during the phase change of the refrigerant in the evaporator to take away the heat from the inside of the refrigerator, thereby achieving the principle of cooling the refrigerator. Since the air in the refrigeration equipment contains moisture, when the air encounters the colder evaporator, moisture will condense. After the evaporator is used for a period of time, the moisture will form a frost layer on the surface of the evaporator's fins. After the refrigerator has been running for a long time, the accumulated thickness of the frost layer is too large, which directly affects the heat transfer rate. The frost layer needs to be removed to solve the problem. Water vapor condenses into frost when it encounters cold. At the same time, after the refrigerator has been running for a certain period of time, the frost layer gradually accumulates and becomes thicker. If these frost layers are not removed regularly, the refrigeration effect of the refrigerator will be affected.

[0003] In order to remove the frost layer condensed on the evaporator, the utility model with publication number CN220981677U discloses a defrosting device and a refrigeration equipment (hereinafter referred to as: prior art 1), including a main electric heating plate, a reflecting layer and an insulating layer, the main electric heating plate including a first plate surface and a second plate surface opposite to each other, the second plate surface of the main electric heating plate facing the area to be defrosted; the reflecting layer is arranged on the first plate surface of the main electric heating plate, for reflecting the heat generated by the main electric heating plate to the area to be defrosted; the insulating layer at least covers the outer surface of the main electric heating plate and the reflecting layer after being connected.

[0004] Although the prior art 1 improves the defrosting efficiency and reduces the defrosting time by allowing the heat generated by the main electric heating plate to act on the area to be defrosted, since the evaporator is provided with fins, the defrosting water generated after part of the frost layer melts will remain on the surface of the fins, which will cause the evaporator surface to frost again, resulting in a reduced defrosting effect. Utility Model Content

[0005] The utility model aims to provide an automatic defrosting device for a refrigerator evaporator, which, in actual use, can solve the problem that after the defrosting device in the prior art melts the frost layer on the evaporator, part of the defrosting water will remain on the surface of the fins, causing the evaporator surface to frost again, resulting in reduced defrosting effect.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] An automatic defrosting device for a refrigerator evaporator comprises a refrigerator body and an evaporator installed in the refrigerator body, and further comprises:

[0008] A defrosting device, the defrosting device is used to be installed on the inner wall of the refrigerator body and is used to defrost the evaporator;

[0009] A water receiving tray, which is installed at the bottom of the defrosting device and is used to receive fallen frost and defrosting water;

[0010] An air blowing device, which is installed on the defrosting device and is used to clean the frost layer and frost water remaining on the evaporator;

[0011] Wherein, the blowing device includes a blower and an exhaust pipe connected to the blower, and the blower is used to introduce external air into the refrigerator body through the exhaust pipe.

[0012] Preferably, the defrost device includes a first electric heating plate, a reflecting layer and an insulating layer, the reflecting layer is arranged on a side of the first electric heating plate away from the evaporator, and the insulating layer covers the outer surface of the first electric heating plate and the reflecting layer after connection; the blower is installed on the top of the first electric heating plate.

[0013] Preferably, the first electric heating plate is U-shaped, and the blower is installed on the insulating layer.

[0014] Preferably, a heat insulating pad is fixedly connected to the bottom end of the blower, and the blowing device is connected to the first electric heating plate through the heat insulating pad.

[0015] Preferably, the water receiving tray is provided with a water outlet, and the water outlet is connected to a water outlet pipe for communicating with the outside.

[0016] Preferably, a guide surface is provided on the water receiving tray.

[0017] Preferably, a second electric heating plate is installed in the water receiving tray.

[0018] Preferably, a plurality of air outlet pipes are obliquely arranged on the exhaust pipe.

[0019] Preferably, the air outlet pipe is rotatably mounted on the exhaust pipe.

[0020] Preferably, the open end of the first electric heating plate is connected to a water baffle.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] In the utility model, the defrosting device installed on the inner wall of the refrigerator body can heat the frost layer condensed on the surface of the evaporator by radiating heat from the evaporator, so that the frost layer condensed on the surface of the evaporator melts into droplets; the water receiving tray installed at the bottom of the defrosting device is used to receive the frost and defrosting water that are prevented from falling off from the evaporator, so as to prevent the defrosting water from dripping on other components arranged in the refrigerator body and affecting the normal use of the refrigerator body;

[0023] When the defrost device is heating the frost layer condensed on the surface of the evaporator, the blower installed on the defrost device draws outside air into the exhaust duct, which is provided with a plurality of air outlets. The gas entering the exhaust duct is blown out through the air outlets to clean the droplets remaining on the evaporator fins, so that the liquid is blown into the water receiving tray under the push of the airflow, thereby further improving the defrosting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a three-dimensional diagram of the utility model.

[0026] Figure 2 It is a structural schematic diagram of the utility model.

[0027] Figure 3 For this utility model Figure 2 A partial enlarged view of point A in the middle.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 101-defrosting device, 102-water receiving tray, 103-blowing device, 104-blower, 105-exhaust pipe, 106-first electric heating plate, 107-reflecting layer, 108-insulating layer, 109-water outlet, 110-water outlet pipe, 111-guiding surface, 112-second electric heating plate, 113-air outlet pipe, 114-water retaining plate. DETAILED DESCRIPTION

[0030] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0031] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0032] In addition, 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0034] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0036] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0037] Example

[0038] See also Figure 1-Figure 3 , this embodiment discloses a defrosting device, specifically an automatic defrosting device for a refrigerator evaporator, comprising a refrigerator body and an evaporator installed in the refrigerator body, and also comprising a defrosting device 101 and a blasting device 103, wherein the defrosting device 101 is used to be installed on the inner wall of the refrigerator body and to defrost the evaporator;

[0039] The water receiving tray 102 is installed at the bottom of the defrosting device 101 and is used to receive the fallen frost and defrosting water; The water receiving tray 102 is installed at the bottom of the defrosting device 101 and is used to receive the fallen frost and defrosting water;

[0040] The blowing device 103 includes a blower 104 and an exhaust pipe 105 connected to the blower 104 , and the blower 104 is used to introduce external air into the refrigerator body through the exhaust pipe 105 .

[0041] In the present invention, a defrosting area is formed between the insulating layer and the evaporator. When the frost layer on the evaporator is processed, the evaporator is stopped first; the defrosting device 101 installed on the inner wall of the refrigerator body can transfer heat to the evaporator to heat the frost layer condensed on the surface of the evaporator, so that the frost layer condensed on the surface of the evaporator is melted into droplets; the water receiving tray 102 installed at the bottom of the defrosting device 101 is used to receive the frost and defrosting water that are prevented from falling off the evaporator, so as to prevent the defrosting water from dripping on other components arranged in the refrigerator body and affecting the normal use of the refrigerator body; when the defrosting device 101 is heating the frost layer condensed on the surface of the evaporator, the blower 104 installed on the defrosting device 101 is used to draw outside air into the refrigerator To the exhaust duct 105, the exhaust duct 105 is provided with a plurality of air outlets, and the gas entering the exhaust duct 105 is blown out through the air outlets to clean the droplets remaining on the evaporator fins, so that the liquid is blown into the water receiving tray 102 under the push of the air flow, thereby further improving the defrosting effect; in this embodiment, the exhaust duct 105 is arranged perpendicular to the fins on the evaporator, so that the airflow blown out through the exhaust outlet can blow the droplets remaining on the fins into the water receiving tray 102 in a direction parallel to the fins, further increasing the cleaning efficiency and cleaning effect of the airflow on the liquid, and the water receiving tray 102 is provided with a make way hole for the pipe connected to the evaporator; the refrigerator body is provided with an exhaust port for exhaust.

[0042] Specifically, the defrost device 101 includes a first electric heating plate 106, a reflecting layer 107 and an insulating layer 108. The reflecting layer 107 is arranged on a side of the first electric heating plate 106 away from the evaporator, and the insulating layer 108 covers the outer surface of the first electric heating plate 106 and the reflecting layer 107 after they are connected; the blower 104 is installed on the top of the first electric heating plate 106. A first electrode is provided on the first electric heating plate 106, and a first wire is connected to the first electrode, and the first electrode is connected to an external power supply through the first wire; when the first electric heating plate 106 is powered on, heat is generated and diffused in all directions, and the heat gathered at one end of the first electric heating plate 106 close to the evaporator is directly radiated to the evaporator; the reflecting layer 107 reflects the heat gathered on the side of the first electric heating plate 106 away from the evaporator toward the evaporator, so that the heat generated on the first electric heating plate 106 can be radiated to the surroundings of the evaporator, thereby accelerating the defrosting efficiency of the evaporator; the insulating layer 108 covers the outer surfaces of the first electric heating plate 106 and the reflecting layer 107, so that the defrosting device 101 is insulated from the inside of the refrigeration equipment, thereby improving the safety of use and reducing heat loss.

[0043] Specifically, the first electric heating plate 106 is U-shaped, and the blower 104 is installed on the insulating layer 108. By setting the first electric heating plate to be U-shaped, the contact area between the heat generated in the first electric heating plate 106 and the evaporator surface can be increased, thereby further improving the defrosting efficiency and reducing the defrosting time.

[0044] Specifically, a heat insulating pad is fixedly connected to the bottom end of the blower 104, and the blowing device 103 is connected to the first electric heating plate 106 through the heat insulating pad. The heat insulating pad is made of ceramic fiber and is fixedly connected to the vertical end of the first electric heating plate 106.

[0045] Specifically, the water receiving tray 102 is provided with a water outlet 109, and the water outlet 109 is connected to a water outlet pipe 110 for communicating with the outside. Frost water collected on the water receiving tray 102 can be discharged in time through the water outlet 109 and the water outlet pipe 110 installed on the water outlet 109.

[0046] Specifically, a guide surface 111 is provided on the water receiving tray 102. By providing the first guide surface, the defrost water falling into the water receiving tray 102 can be conveniently guided to the water outlet 109 for discharge.

[0047] Specifically, a second electric heating plate 112 is installed in the water receiving tray 102. A second electrode is provided on the second electric heating plate 112, and a second wire is connected to the second electrode. The second electrode is connected to an external power source through the second wire; when the second electric heating plate 112 is powered on, it generates radiant heat to the surface of the water receiving tray 102, so that part of the frost remaining in the water receiving tray 102 melts and can be discharged through the water outlet 109.

[0048] Specifically, a plurality of air outlet pipes 113 are obliquely arranged on the exhaust pipe 105. The air outlet pipes 113 are arranged parallel to the fins connected to the evaporator, and the air outlet pipes 113 are obliquely arranged toward the evaporator, thereby further improving the cleaning effect of the liquid droplets remaining on the evaporator.

[0049] Specifically, the air outlet pipe 113 is rotatably mounted on the exhaust pipe 105. A slider is provided on the air outlet pipe 113, and a slide groove is provided on the exhaust pipe 105. The air outlet pipe 113 is slidably mounted on the slide groove through the slider; by rotatably mounting the air outlet pipe 113 on the exhaust pipe 105, the air outlet angle of the air outlet pipe 113 can be adjusted according to actual needs.

[0050] Specifically, the open end of the first electric heating plate 106 is connected with a water baffle 114. There are two water baffles 114, which are fixedly connected to the vertical ends of the first electric heating plate 106. The water baffles 114 are used to block some of the droplets blown away by the airflow. After the droplets contact the water baffles 114, they are guided by the water baffles 114 to the water receiving tray 102 for collection.

[0051] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic defrosting device for a refrigerator evaporator, comprising a refrigerator body and an evaporator installed in the refrigerator body, characterized in that: Also includes: A defrosting device (101), the defrosting device (101) being used to be installed on the inner wall of a refrigerator body and to defrost the evaporator; A water receiving tray (102), the water receiving tray (102) being installed at the bottom of the defrosting device (101) and being used to receive fallen frost and defrosting water; An air blowing device (103), wherein the air blowing device (103) is installed on the defrosting device (101) and is used to clean the frost layer and frost water remaining on the evaporator; The air blowing device (103) comprises a blower (104) and an exhaust pipe (105) connected to the blower (104); the blower (104) is used to introduce external air into the refrigerator body through the exhaust pipe (105).

2. The automatic defrosting device for refrigerator evaporator according to claim 1, characterized in that: The defrosting device (101) comprises a first electric heating plate (106), a reflective layer (107) and an insulating layer (108); the reflective layer (107) is arranged on a side of the first electric heating plate (106) away from the evaporator, and the insulating layer (108) covers the outer surface of the first electric heating plate (106) and the reflective layer (107) after they are connected; and the blower (104) is installed on the top of the first electric heating plate (106).

3. The automatic defrosting device for refrigerator evaporator according to claim 2, characterized in that: The first electric heating plate (106) is U-shaped, and the blower (104) is installed on the insulating layer (108).

4. The automatic defrosting device for refrigerator evaporator according to claim 3, characterized in that: A heat insulation pad is fixedly connected to the bottom end of the blower (104), and the blowing device (103) is connected to the first electric heating plate (106) via the heat insulation pad.

5. The automatic defrosting device for refrigerator evaporator according to claim 1, characterized in that: The water receiving tray (102) is provided with a water outlet (109), and the water outlet (109) is connected to a water outlet pipe (110) for communicating with the outside.

6. The automatic defrosting device for refrigerator evaporator according to claim 5, characterized in that: The water receiving tray (102) is provided with a flow guide surface (111).

7. The automatic defrosting device for refrigerator evaporator according to claim 3, characterized in that: A second electric heating plate (112) is installed in the water receiving tray (102).

8. The automatic defrosting device for refrigerator evaporator according to claim 1, characterized in that: A plurality of air outlet pipes (113) are obliquely arranged on the exhaust pipe (105).

9. The automatic defrosting device for refrigerator evaporator according to claim 8, characterized in that: The air outlet pipe (113) is rotatably mounted on the air exhaust pipe (105).

10. The automatic defrosting device for refrigerator evaporator according to claim 3, characterized in that: The open end of the first electric heating plate (106) is connected to a water baffle (114).

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