Defrosting system based on commercial low-temperature air-cooled refrigerator

Abstract

The utility model discloses a defrosting system based on a commercial low-temperature air-cooled refrigerator, which relates to the field of refrigerator defrosting and comprises an outer shell, a protective cover is arranged at the front end of the outer shell, a booster fan is arranged at the front end of the protective cover, a connecting pipe is connected to the bottom end of an external pipe, an electric control three-way valve is connected to an exhaust pipe, and the electric control three-way valve is connected to the exhaust pipe. A plurality of fins are installed in the outer shell, a first coil pipe and a second coil pipe which spirally penetrate through the fins are arranged on the fins, the fins and the coil pipes are limited in the outer shell, it is guaranteed that normal-temperature air in the outer shell 1 is sufficient through a booster fan, heat exchange of the normal-temperature air can be normally conducted, the normal-temperature air can be cooled, and the heat exchange efficiency of the normal-temperature air is improved. Meanwhile, the hot-air blower and the three-way valve are arranged, when frost exists on the fins, hot air is injected into the outer shell 1, the frost on the fins can be melted in cooperation with the booster fan, and meanwhile the three-way valve is used for controlling hot air to not enter the refrigerator during defrosting.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerator defrosting, in particular to a defrosting system based on a commercial low-temperature air-cooled refrigerator. Background Art

[0002] The evaporator is used in the refrigeration system. The low-temperature condensed liquid passes through the evaporator to exchange heat with the outside air, vaporizes and absorbs heat to achieve the refrigeration effect. However, when the freezer refrigeration system is operating normally, the temperature of the evaporator surface is much lower than the dew point temperature of the air. The moisture in the air will be analyzed and condensed on the pipe wall. If the pipe wall temperature is below zero degrees, the dew will condense into frost, which will affect the working efficiency of the evaporator.

[0003] There are many ways to defrost, such as natural defrost, electric defrost, etc. However, for the defrost system used in a refrigerator, using natural defrost will cause the refrigerator to be unable to work for a long time, which may cause the items that need to be refrigerated to deteriorate in the refrigerator, while electric defrost can only locally heat the evaporator, causing uneven heating, and it is difficult to melt all the frost on the surface of the evaporator. Therefore, a defrost system based on a commercial low-temperature air-cooled refrigerator is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a defrosting system based on a commercial low-temperature air-cooled freezer to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a defrosting system based on a commercial low-temperature air-cooled freezer comprises an outer shell, a shield is arranged at the front end of the outer shell, a booster fan is arranged at the front end of the shield, an external pipe passes through the shield, a connecting pipe is connected to the bottom end of the external pipe, an exhaust pipe is installed at the end of the outer shell, an electrically controlled three-way valve is connected to the exhaust pipe, a plurality of fins are installed inside the outer shell, a first coil and a second coil are arranged on the fins which are spirally passed through, the fins and the coils are both restricted in the outer shell, the booster fan is used to ensure that the normal temperature air inside the outer shell 1 is sufficient, so that the heat exchange of the normal temperature air can be carried out normally, and the normal temperature air is cooled, and a hot air blower and a three-way valve are arranged at the same time, when there is frost on the fins, hot air is poured into the outer shell 1, and the frost on the fins can be melted by the booster fan, and the three-way valve is used to control the hot air during defrosting so that it will not enter the interior of the freezer.

[0006] Preferably, a rack is provided in the middle of the outer shell, a plurality of fins are evenly arranged between the rack and the inner wall of the outer shell, and the fins penetrate the front and rear ends of the outer shell, and the first coil and the second coil both spirally pass through each fin several times to ensure that the low-temperature liquid source flowing in the coil can exchange heat with the normal temperature air through the fins.

[0007] Preferably, the first coil is arranged on the outside of the fin, and the second coil is arranged on the inside of the fin. The first coil is connected to the second coil at the end of the outer shell. The front ends of the first coil and the second coil extend through the outer shell to the outside. The first coil is connected to the external low-temperature liquid source, and then after the heat exchange is completed through the fin, it is discharged by the second coil.

[0008] Preferably, the connecting pipe is connected to an external pipe, the external pipe is connected to an external hot air blower, the connecting pipe is evenly provided with a plurality of distribution holes, the end of the connecting pipe is installed on a rack, and the high-temperature air generated by the hot air blower tool is discharged from the distribution holes on the connecting pipe, and then the booster fan works to blow the hot air over the fins to melt the frost.

[0009] Preferably, a drain pipe is provided below the exhaust pipe, and the front end of the outer shell is tilted with the end facing downward, so that the water after the frost melts can be discharged more smoothly from the drain pipe.

[0010] Preferably, one of the outlets of the electrically controlled three-way valve is connected to the refrigerator storage room through a conduit. When connected to the refrigerator storage room, normal temperature air is introduced into the outer shell, and the low-temperature air cooled by the fins is discharged into the storage room. The high-temperature air during defrosting will be controlled by the electrically controlled three-way valve and will not be introduced into the refrigerator storage room.

[0011] Preferably, the front end of the first coil is connected to an external low-temperature liquid source, and the low-temperature liquid is introduced into the interior of the outer shell to facilitate heat exchange between the fins and normal temperature air.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The fins and coils are both arranged inside the outer shell, and a booster fan is used to ensure that there is sufficient room-temperature air inside the outer shell, so that the room-temperature air passing through the outer shell can exchange heat with the cold liquid in the coil through the fins to achieve the purpose of refrigeration. At the same time, when the fins inside the evaporator are frosted, the external hot air is introduced and the booster fan is used again to make the hot air pass through the fins, which can evenly melt the frost on the fins to achieve a defrosting effect. In addition, since the hot air will be restricted by the outer shell, the random dissipation of hot air can be avoided, so that the frost on the fins can be melted quickly and stably. At the same time, the three-way valve set at the exhaust pipe can control the hot air during defrosting to not be poured into the refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front appearance structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the appearance structure of the tail of the utility model;

[0016] Figure 3 This is a schematic diagram of the fin and coil installation structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the coil structure of the utility model.

[0018] In the figure: 1. outer shell; 2. external pipe; 3. booster fan; 4. drain pipe; 5. exhaust pipe; 6. first coil; 7. second coil; 8. fin; 9. connecting pipe; 10. emission hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figures 1 to 4 The utility model provides a technical solution of a defrosting system based on a commercial low-temperature air-cooled freezer: a defrosting system based on a commercial low-temperature air-cooled freezer, such as Figures 1 to 4 As shown, it includes an outer shell 1, a protective cover is arranged at the front end of the outer shell 1, a booster fan 3 is installed in the middle of the protective cover, and the booster fan 3 connects the inside of the outer shell 1 with the outside, and at the same time, an external pipe 2 passes through the top of the protective cover, and the external pipe 2 is connected with the external hot air source through a conduit, and the hot air source can be emitted by a hot air blower or a hot air pump. An exhaust pipe 5 is arranged in the middle of the end of the outer shell 1, and the exhaust pipe 5 is connected with the refrigerator through a three-way valve. A drain pipe 4 is arranged below the exhaust pipe 5, and a rack is arranged in the middle of the inner part of the outer shell 1. Between the rack and the inner wall of the outer shell 1 A number of fins 8 are evenly installed, and the fins 8 pass through the front and rear ends of the outer shell 1. At the same time, two coils pass through the fins 8, namely a first coil 6 facing the outside and a second coil 7 facing the inside. The front ends of the two coils pass through the outer shell 1. The first coil 6 is connected to an external low-temperature liquid source. The two coils are spirally shaped, spiraling from the front end of the outer shell 1 to the end of the outer shell 1. At the same time, the two coils are connected at the end of the outer shell 1. A connecting pipe 9 is installed at the front end of the rack rod. The connecting pipe 9 is connected to the external pipe 2, and a number of dispersing holes 10 are evenly opened on the connecting pipe 9.

[0021] Working principle: This device is installed inside the refrigerator, wherein the booster fan 3 is directly exposed to the outside air, and the exhaust pipe 5 is connected to the storage room inside the refrigerator through a three-way valve and a conduit, wherein the three-way valve is electrically controlled, and the position of the booster fan 3 is slightly lifted upward, so that the condensed water generated in the subsequent defrosting operation of the device can be conveniently discharged from the drain pipe 4. During normal operation, the booster fan 3 works to inject a large amount of normal temperature air into the interior of the outer shell 1. When the normal temperature air passes through the fins 8, it exchanges heat with the low-temperature refrigerant, and the normal temperature air is cooled to cold air, and then gathered at the exhaust pipe 5 and introduced into the storage room inside the refrigerator. After a certain period of use, frost will appear on the surface of the fins 8. At this time, the hot air blower works to generate high temperature air, It is transmitted to the inside of the protective cover through the external pipe 2, and then evenly distributed from the distribution holes 10 on the connecting pipe 9. The normal temperature air driven by the booster fan 3 when it is working will cause the hot air to move from the front end to the rear end of the outer shell 1. During the movement, the hot air will remove the frost on the surface of the fin 8. The removed frost melts into water and is discharged from the drain pipe 4 along the inclined outer shell 1. During the defrosting operation, when the hot air is discharged through the exhaust pipe 5, the electrically controlled three-way valve works, so that the hot air will flow out from the other end of the three-way valve and will not flow into the interior of the refrigerator to affect the storage in the refrigerator. After the defrosting operation is completed, the electrically controlled three-way valve is restored, the external hot air blower stops working, and the cold air generated by the evaporator can enter the refrigerator normally through the three-way valve.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, 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 a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A defrosting system based on a commercial low-temperature air-cooled freezer, comprising an outer shell (1), characterized in that: The front end of the outer shell (1) is provided with a protective cover, the front end of the protective cover is provided with a booster fan (3), an external pipe (2) passes through the protective cover, the bottom end of the external pipe (2) is connected to a connecting pipe (9), an exhaust pipe (5) is installed at the end of the outer shell (1), the exhaust pipe (5) is connected to an electrically controlled three-way valve, a plurality of fins (8) are installed inside the outer shell (1), and a first coil (6) and a second coil (7) are spirally passed through the fins (8).

2. The defrosting system based on a commercial low-temperature air-cooled freezer according to claim 1, characterized in that: A rack rod is arranged at the middle position inside the outer shell (1), and a plurality of fins (8) are evenly arranged between the rack rod and the inner wall of the outer shell (1), and the fins (8) penetrate the front and rear ends of the outer shell (1), and the first coil (6) and the second coil (7) both spirally pass through each fin (8) several times.

3. The defrosting system based on a commercial low-temperature air-cooled freezer according to claim 1, characterized in that: The first coil (6) is arranged on the outside of the fin (8), and the second coil (7) is arranged on the inside of the fin (8). The first coil (6) and the second coil (7) are connected at the end of the outer shell (1), and the front ends of the first coil (6) and the second coil (7) pass through the outer shell (1) and extend to the outside.

4. The defrosting system based on a commercial low-temperature air-cooled freezer according to claim 1, characterized in that: The connecting pipe (9) is connected to the external pipe (2), and the external pipe (2) is connected to an external hot air blower. The connecting pipe (9) is evenly provided with a plurality of emission holes, and the end of the connecting pipe (9) is mounted on a rack rod.

5. The defrosting system based on a commercial low-temperature air-cooled freezer according to claim 1, characterized in that: A drain pipe (4) is provided below the exhaust pipe (5), and the front end of the outer shell (1) is tilted and the end faces downward.

6. The defrosting system based on a commercial low-temperature air-cooled freezer according to claim 1, characterized in that: One outlet of the electric-controlled three-way valve is communicated with the refrigerator storage chamber through a conduit.

7. The defrosting system based on a commercial low-temperature air-cooled freezer according to claim 1, characterized in that: The front end of the first coil (6) is connected to an external low-temperature liquid source.

Images