A safe defrosting structure for evaporator in refrigerator

Abstract

The present invention discloses a safe defrosting structure for an evaporator in a refrigerator, and relates to the technical field of refrigerator evaporators, including a storage room provided in a refrigerator body, wherein the storage room has a partition separating the storage room from a rear shell in the refrigerator body at a position corresponding to the rear side of the refrigerator body, and a spacing accommodating cavity is formed between the partition and the refrigerator body, and an evaporator is arranged in the spacing accommodating cavity, and the bottom of the refrigerator body also has an equipment bin, and a compressor is arranged in the equipment bin, and an active defrosting mechanism and a passive defrosting mechanism for defrosting the evaporator are arranged in the refrigerator body. The present invention sets two modes, an active defrosting mechanism and a passive defrosting mechanism, which can artificially predict the degree of frost on the evaporator, and flexibly select any one of the two modes, the passive defrosting mechanism has an energy-saving effect, and the active defrosting mechanism can achieve the effect of quickly melting the frost, and can dissipate heat to the equipment bin, killing two birds with one stone, and achieving a significant practical effect.

Description

Technical Field

[0001] The invention relates to the technical field of refrigerator evaporators, in particular to a safe defrosting structure for an evaporator in a refrigerator. Background Art

[0002] A conventional refrigerator includes a cabinet, a compression refrigeration system and a door. The cabinet may include an inner tank, an insulation layer and an outer shell, wherein the inner tank has a storage space, and the door is used to open or close the storage space. The compression refrigeration system may include a compressor, a condenser, a throttling device and an evaporator. The inlet end of the condenser is connected to the outlet of the compressor, the outlet end of the condenser is connected to the throttling device, the inlet end of the evaporator is connected to the throttling device, and the outlet end of the evaporator is connected to the inlet of the compressor. In a refrigerator, cold air is generated during a series of cooling cycles and sent to a cold storage room or a freezer. The cold air becomes warmer air during a heat exchange process in the corresponding chamber and returns to a cooling chamber having an evaporator. The above process is repeated thereafter. During this cycle, the air returning to the evaporator contacts a set of tubes through which the cold refrigerant passes, and the moisture contained in the air condenses and freezes on these tubes.

[0003] The refrigerator defrosts the evaporator by heating it, which significantly increases the power consumption of the refrigerator and has a poor effect. For example, when the working intensity of the evaporator is not high, there is no need to start the heating device for heating. However, when defrosting is not needed, the heating is started instead, resulting in a waste of electric energy. In addition, the existing heating device can only heat and defrost the evaporator, but does not have other functions. It is relatively simple and not economical and practical. Summary of the invention

[0004] The object of the present invention is to provide a safe defrosting structure for an evaporator in a refrigerator to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A safe defrost structure for an evaporator in a refrigerator, comprising a storage chamber in the refrigerator body, wherein the storage chamber is provided with a partition plate at a position corresponding to the rear side of the refrigerator body, separating the storage chamber from a rear shell of the refrigerator body, and a partition accommodating cavity is formed between the partition plate and the inner rear wall of the refrigerator body, wherein the partition accommodating cavity is provided with an evaporator for cooling the storage chamber, the bottom of the refrigerator body is also provided with an equipment bin, and the equipment bin is provided with a compressor, an active defrost mechanism and a passive defrost mechanism for defrosting the evaporator are arranged in the refrigerator body, a connecting port for wind connection is provided between the partition accommodating cavity and the equipment bin, the active defrost mechanism comprises an exhaust fan fixedly installed at the top of the equipment bin just below the connecting port, an upper opening end of the connecting port is fixedly connected to an air distribution plate, a through hole is provided in the middle of the bottom surface of the air distribution plate, and the air distribution plate is integrally formed as an inner The part is a hollow structure and is vertically fixedly installed on one side of the partition accommodating cavity close to the rear wall of the refrigerator body through a bracket, and a plurality of evenly distributed through holes are opened on the side of the air distribution plate facing the evaporator, and the outer end of each through hole is fixedly connected with an air outlet hood in the shape of a suction cup, and a heat release bracket is fixedly installed in the air distribution plate, and the side of the heat release bracket facing the evaporator is evenly fixedly connected with one end of a plurality of heat-conducting parts, and the other end of the heat-conducting part passes through the corresponding air outlet hood and extends between adjacent pipes of the evaporator, and at the same time, the lower end of the heat release bracket is connected to the heating end of the semiconductor refrigeration plate through heat-conducting glue, the semiconductor refrigeration plate is fixedly installed in the connecting port through the bracket and its cooling end is at the top of the equipment compartment, and a through opening for the installation of an inlet fan is also opened on the lower edge of the back of the refrigerator body, and the inner side of the through opening is connected with the through hole opened at the corresponding position of the lower side of the air distribution plate.

[0007] As a further solution of the present invention: the passive defrosting mechanism includes an exhaust fan fixedly installed on the top of the equipment bin just below the connecting port.

[0008] As a further solution of the present invention: the inner peripheral surface of the air outlet cover is compositely connected with sound-absorbing cotton.

[0009] As a further solution of the present invention: a dustproof net is fixedly installed on the outside of the opening where the inlet fan is installed.

[0010] As a further solution of the present invention: the heat conducting member is a heat releasing rod.

[0011] As a further solution of the present invention: the heat conducting member is a serpentine heat releasing rod.

[0012] As a further solution of the present invention: the heat release bracket includes an upper vertical bracket and a horizontal bracket, the vertical bracket and the horizontal bracket are interconnected to form a frame structure, and the lower two sides of the frame structure extend downward through a plurality of arc-shaped bent rods to form a narrowing shape.

[0013] As a further scheme of the present invention: a water flow hole connecting the equipment bin and the interval accommodating chamber is opened between the connection of the two, the bottom end of the water flow hole is fixedly connected to one end of the three-way pipe through a pipe, and the other end of the three-way pipe is fixedly connected to one end of the second water outlet pipe, and the other end of the second water outlet pipe passes out of the equipment bin, and a second solenoid valve is fixedly installed on the second water outlet pipe, and the remaining end of the three-way pipe is sealed and fastened to one end of the downpipe, and the other end of the downpipe is fixedly connected to one end of the first water outlet pipe through an annular heat exchange pipe, the annular heat exchange pipe is fixedly installed on the outer periphery of the compressor through a bracket, and the other end of the first water outlet pipe passes out of the equipment bin, when the passive defrost mechanism is working, only the exhaust fan is turned on, the second solenoid valve is turned on, and the first solenoid valve is closed; when the active defrost mechanism is working, only the inlet fan and the semiconductor refrigeration plate are turned on, the second solenoid valve is closed, and the first solenoid valve is opened.

[0014] As a further solution of the present invention: the inner surface of the equipment bin is compositely connected to one side of the thermal insulation cotton layer, and the other side of the thermal insulation cotton layer is compositely connected to the tin foil layer, and a plurality of heat dissipation holes are opened on one side of the equipment bin.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention is provided with two modes, an active defrost mechanism and a passive defrost mechanism, which can artificially predict the degree of frost on the evaporator and flexibly select any one of the two modes. The passive defrost mechanism has an energy-saving effect, and the active defrost mechanism can achieve the effect of quickly melting the frost. At the same time, the heating end of the semiconductor refrigeration plate conducts heat to the heat release bracket, and cooperates with the hot air generated by the inlet fan, and then uses the heat conductive part to diffuse the hot air into the evaporator pipe, so as to achieve the effect of quickly melting the frost. At the same time, the cooling end of the semiconductor refrigeration plate cools the air in the equipment compartment, so that the equipment compartment can be dissipated. It kills two birds with one stone and achieves a significant practical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the positions of the heat conducting member and the evaporator in the present invention;

[0019] Figure 3 It is a schematic diagram of the installation of the heat release bracket and the semiconductor cooling sheet in the present invention;

[0020] Figure 4 It is a structural schematic diagram of the active defrosting mechanism in the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the serpentine heat release rod in the present invention;

[0022] Figure 6 for Figure 1 A magnified view of the structure in Figure 2.

[0023] In the figure: 1. refrigerator body; 2. evaporator; 3. partition; 4. storage room; 5. equipment compartment; 6. compressor; 7. first water outlet pipe; 8. annular heat exchange pipe; 9. downpipe; 10. second water outlet pipe; 11. exhaust fan; 12. semiconductor refrigeration plate; 13. connecting port; 14. interval accommodating chamber; 15. air distribution plate; 16. air outlet hood; 17. heat release rod; 18. vertical bracket; 19. horizontal bracket; 20. sound-absorbing cotton; 21. serpentine heat release rod; 22. arc-shaped bent rod; 23. water flow hole; 24. three-way pipe; 25. thermal insulation cotton layer; 26. tin foil layer; 27. first solenoid valve; 28. second solenoid valve; 29. ​​heat dissipation hole; 30. inlet fan; 31. dustproof net. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figures 1 to 6In an embodiment of the present invention, a safe defrosting structure for an evaporator in a refrigerator comprises a storage chamber 4 in a refrigerator body 1, wherein the storage chamber 4 has a partition 3 at a position corresponding to the rear side of the refrigerator body 1 for separating the storage chamber 4 from the inner rear shell of the refrigerator body 1, and a partition accommodating cavity 14 is formed between the partition 3 and the inner rear wall of the refrigerator body 1, wherein the partition accommodating cavity 14 has an evaporator 2 for refrigerating the storage chamber 4, the bottom of the refrigerator body 1 also has an equipment compartment 5, and the equipment compartment 5 has a compressor 6, and the refrigerator body 1 is provided with a main unit for defrosting the evaporator 2. The active defrost mechanism and the passive defrost mechanism are provided, and a connecting port 13 for air connection is provided between the interval accommodating chamber 14 and the equipment compartment 5. The active defrost mechanism includes an exhaust fan 11 fixedly installed at the top of the equipment compartment 5 just below the connecting port 13, and an upper open end of the connecting port 13 is fixedly connected to an air distribution plate 15, and a through hole is provided in the middle of the bottom surface of the air distribution plate 15. The air distribution plate 15 is integrally formed into a hollow structure inside and is vertically fixedly installed on one side of the interval accommodating chamber 14 close to the rear wall of the refrigerator body 1 through a bracket, and a plurality of uniformly distributed air distribution plates 15 are provided on the side of the air distribution plate 15 facing the evaporator 2. The air distribution plate 15 is perforated, and each perforated outer end is fixedly connected with an air outlet cover 16 in the shape of a suction cup, and a heat release bracket is fixedly installed in the air distribution plate 15, and the heat release bracket is evenly fixedly connected with one end of multiple heat-conducting members on the side facing the evaporator 2, and the other end of the heat-conducting member passes through the corresponding air outlet cover 16 and extends between adjacent pipes of the evaporator 2. At the same time, the lower end of the heat release bracket is connected to the heating end of the semiconductor refrigeration sheet 12 through heat-conducting glue, and the semiconductor refrigeration sheet 12 is fixedly installed in the connecting port 13 through the bracket and its cooling end is at the top of the equipment compartment 5. The refrigerator body 1 is also provided with a through hole for installing the inlet fan 30, and the inner side of the through hole is communicated with the through hole provided at the corresponding position of the lower side of the air distribution plate 15, the semiconductor refrigeration sheet 12 and the inlet fan 30 are started, the heating end of the semiconductor refrigeration sheet 12 conducts heat to the heat release bracket, and cooperates with the hot air generated by the inlet fan 30, and then uses the heat conductive member to diffuse the hot air into the evaporator 2 pipeline, so as to achieve the effect of quickly melting the frost. At the same time, the cooling end of the semiconductor refrigeration sheet 12 cools the air in the equipment compartment 5, so as to dissipate the heat of the equipment compartment 5, killing two birds with one stone, and achieving a significant practical effect.

[0026] The passive defrosting mechanism includes an exhaust fan 11 fixedly installed on the top of the equipment compartment 5 just below the connecting port 13. The exhaust fan 11 is controlled to run slowly by absorbing the heat generated by the compressor 6 or other devices in the equipment compartment 5 during operation, and then the heat generated in the equipment compartment 5 is blown to the evaporator 2 through the air outlet hood 16 on the air distribution plate 15. Since the wind carries a certain amount of residual heat, the frost on the evaporator 2 can be slowly melted.

[0027] The inner circumferential surface of the air outlet cover 16 is compositely connected with sound-absorbing cotton 20. The air outlet cover 16 is in the shape of a suction cup and can achieve a sound-absorbing effect. It cooperates with the sound-absorbing cotton 2 to further absorb noise, thereby ensuring the quietness of the evaporator 2 during operation.

[0028] A dustproof net 31 is fixedly installed outside the opening where the inlet fan 30 is installed to prevent external dust from being blown into the refrigerator body 1.

[0029] The heat-conducting member is a heat-releasing rod 17 , which is used to transfer the heat on the heat-releasing bracket to the adjacent pipes of the evaporator 2 , thereby achieving the effect of melting the frost on the pipes of the evaporator 2 .

[0030] The heat conducting member is a serpentine heat releasing rod 21, which is curved so as to expand the heat releasing range and better diffuse the heat to the pipe of the evaporator 2, so as to accelerate the melting of frost on the pipe.

[0031] The heat release bracket includes an upper vertical bracket 18 and a horizontal bracket 19, which are interconnected to form a frame structure, and the lower two sides of the frame structure extend downward through a plurality of arc-shaped bent rods 22 to form a narrowed shape. The purpose is to achieve the effect of heating the heat release bracket and cooling the equipment compartment 5 by setting the lower part of the heat release bracket to be narrowed so that it can fit onto the heating ends of the two semiconductor refrigeration plates 12, thereby achieving energy-saving effect.

[0032] A water hole 23 is provided between the connection between the equipment bin 5 and the interval accommodating chamber 14 to connect the two. The bottom end of the water hole 23 is fixedly connected to one end of a tee pipe 24 through a pipeline, and the other end of the tee pipe 24 is fixedly connected to one end of a second water outlet pipe 10, and the other end of the second water outlet pipe 10 passes through the equipment bin 5, and a second solenoid valve 28 is fixedly installed on the second water outlet pipe 10, and the remaining end of the tee pipe 24 is sealed and fastened to one end of a downpipe 9, and the other end of the downpipe 9 is fixedly connected to one end of the first water outlet pipe 7 through an annular heat exchange pipe 8, and the annular heat exchange pipe 8 is fixedly installed on the outer periphery of the compressor 6 through a bracket. The other end of the first water outlet pipe 7 passes through the equipment compartment 5. When the passive defrost mechanism is working, only the exhaust fan 11 is turned on, the second solenoid valve 28 is turned on, the first solenoid valve 27 is closed, and the melted water is discharged through the second water outlet pipe 10; and when the active defrost mechanism is working, only the inlet fan 30 and the semiconductor refrigeration plate 12 are turned on, the second solenoid valve 28 is closed, the first solenoid valve 27 is opened, and the cooling water is discharged through the first water outlet pipe 7. In this process, the cooling water passes through the annular heat exchange tube 8 to absorb the heat around the compressor 6 to a certain extent, thereby achieving the purpose of auxiliary cooling, which helps to maintain the stable and continuous working state of the compressor 6.

[0033] The inner surface of the equipment bin 5 is compositely connected to one side of the thermal insulation cotton layer 25, and the other side of the thermal insulation cotton layer 25 is compositely connected to the tin foil layer 26, and a plurality of heat dissipation holes 29 are opened on one side of the equipment bin 5, which can timely discharge the excessive heat accumulated in the equipment bin 5, thereby improving the thermal insulation effect in the equipment bin 5, so as to retain the heat to the maximum extent and reduce the volatilization of heat, so as to ensure the effect of the passive defrosting mechanism when it is working.

[0034] In the description of the present invention, 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 the present invention can be understood by specific circumstances.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A safe defrosting structure for an evaporator in a refrigerator, comprising a storage chamber (4) in a refrigerator body (1), wherein the storage chamber (4) has a partition (3) at a position corresponding to the rear side of the refrigerator body (1) for separating the storage chamber (4) from an inner rear shell of the refrigerator body (1), and a spacing accommodating cavity (14) is formed between the partition (3) and the inner rear wall of the refrigerator body (1), wherein an evaporator (2) for cooling the storage chamber (4) is arranged in the spacing accommodating cavity (14), and the bottom of the refrigerator body (1) further has an equipment compartment (5), and a compressor (6) is arranged in the equipment compartment (5), characterized in that: The refrigerator body (1) is provided with an active defrosting mechanism and a passive defrosting mechanism for defrosting the evaporator (2); a connecting port (13) for air connection is provided between the spacing accommodating cavity (14) and the equipment compartment (5); the active defrosting mechanism comprises an exhaust fan (11) fixedly installed at the top of the equipment compartment (5) just below the connecting port (13); an upper open end of the connecting port (13) is fixedly connected to an air distribution plate (15); a through hole is provided in the middle of the bottom surface of the air distribution plate (15); the air distribution plate (15) is integrally formed into a hollow structure and is vertically fixedly installed on a side of the spacing accommodating cavity (14) close to the rear wall of the refrigerator body (1) through a bracket; and a plurality of evenly distributed through holes are provided on a side of the air distribution plate (15) facing the evaporator (2), and each through hole is provided with a plurality of evenly distributed through holes. The outer ends of the holes are fixedly connected to air outlet covers (16) in the shape of suction cups, and a heat release bracket is fixedly installed in the air distribution plate (15). The heat release bracket is fixedly connected to one end of a plurality of heat-conducting parts on the side facing the evaporator (2), and the other end of the heat-conducting parts passes through the corresponding air outlet covers (16) and extends between adjacent pipes of the evaporator (2). At the same time, the lower end of the heat release bracket is connected to the heating end of the semiconductor refrigeration plate (12) through heat-conducting glue. The semiconductor refrigeration plate (12) is fixedly installed in the connecting port (13) through the bracket, and its cooling end is located at the top of the equipment compartment (5). The lower edge of the back of the refrigerator body (1) is also provided with a through hole for installing an inlet fan (30), and the inner side of the through hole is connected to a through hole provided at a corresponding position on the lower side of the air distribution plate (15); The passive defrosting mechanism comprises an exhaust fan (11) fixedly installed on the top of the equipment bin (5) just below the communication port (13); The heat release bracket comprises an upper vertical bracket (18) and a horizontal bracket (19), the vertical bracket (18) and the horizontal bracket (19) being connected to each other to form a frame structure, and two sides of the lower part of the frame structure extend downwards through a plurality of arc-shaped curved rods (22) to form a narrowing shape; A water flow hole (23) is provided between the connection point of the equipment bin (5) and the spacer accommodating chamber (14) to connect the two. The bottom end of the water flow hole (23) is fixedly connected to one end of a three-way pipe (24) through a pipeline, and the other end of the three-way pipe (24) is fixedly connected to one end of a second water outlet pipe (10). The other end of the second water outlet pipe (10) passes through the outside of the equipment bin (5), and a second solenoid valve (28) is fixedly installed on the second water outlet pipe (10). The other end of the three-way pipe (24) is sealed and fastened to one end of a downpipe (9), and the downpipe (9) The other end of the air conditioning unit (10) is fixedly connected to one end of the first water outlet pipe (7) through an annular heat exchange pipe (8), the annular heat exchange pipe (8) is fixedly mounted on the outer periphery of the compressor (6) through a bracket, and the other end of the first water outlet pipe (7) passes through the outside of the equipment compartment (5), when the passive defrosting mechanism is in operation, only the exhaust fan (11) is turned on, the second solenoid valve (28) is turned on, and the first solenoid valve (27) is turned off; and when the active defrosting mechanism is in operation, only the air inlet fan (30) and the semiconductor refrigeration plate (12) are turned on, the second solenoid valve (28) is turned off, and the first solenoid valve (27) is turned on.

2. A safe defrosting structure for an evaporator in a refrigerator according to claim 1, characterized in that: The inner peripheral surface of the air outlet cover (16) is compositely connected with sound-absorbing cotton (20).

3. The safe defrosting structure of the evaporator in the refrigerator according to claim 1, characterized in that: A dustproof net (31) is fixedly mounted on the outside of the opening where the air inlet fan (30) is installed.

4. The safe defrosting structure of the evaporator in the refrigerator according to claim 1, characterized in that: The heat conducting member is a heat releasing rod (17).

5. The safe defrosting structure of the evaporator in the refrigerator according to claim 1, characterized in that: The heat conducting member is a serpentine heat releasing rod (21).

6. A safe defrosting structure for an evaporator in a refrigerator according to any one of claims 1 to 5, characterized in that: The inner surface of the equipment bin (5) is compositely connected to one side of the thermal insulation cotton layer (25), while the other side of the thermal insulation cotton layer (25) is compositely connected to a tin foil layer (26), and a plurality of heat dissipation holes (29) are provided on one side of the equipment bin (5).

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