Multifunctional defrosting structure of refrigerating system evaporator

Abstract

The multifunctional defrosting structure of the refrigerating system evaporator comprises an evaporator body, a heat exchange fan, a driving motor, an electric heating pipe and a water collecting tank, the heat exchange fan is arranged at the top of the evaporator body, the driving motor is arranged at one end of the heat exchange fan in a transmission mode, and the electric heating pipe is arranged at the other end of the heat exchange fan. The electric heating pipe is arranged between the evaporator body and the heat exchange fan, and the water collecting tank is arranged at the bottom of the evaporator body. According to the multifunctional defrosting structure, air defrosting is carried out through the heat exchange fan, electric heating defrosting is carried out through the electric heating pipe, combined defrosting can be carried out through the heat exchange fan and the electric heating pipe, spraying type defrosting is carried out in cooperation with the spraying pipe, multifunctional defrosting of the evaporator is achieved, the defrosting mode can be reasonably selected according to actual working conditions, the defrosting efficiency is guaranteed, and meanwhile the defrosting efficiency is improved. Power consumption is reduced as much as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporator defrosting, in particular to a multifunctional defrosting structure of an evaporator in a refrigeration system. Background Art

[0002] The air-cooled evaporator used in the refrigeration system, under low temperature conditions (below 0℃), the water vapor in the air meets the low-temperature fins or copper tubes and condenses into small solid ice crystals. Over time, the evaporator will begin to frost. As the frost layer thickens, the heat exchange between the air and the fins is hindered, and the heat exchange efficiency is reduced. At this time, defrosting is required.

[0003] The current defrosting methods mainly include the following:

[0004] 1. Water defrosting: Use a water spray device to spray water on the outer surface of the evaporator so that the frost layer is melted and washed away by the heat of the water. However, this method consumes a lot of water and is only limited to evaporators with drainage pipes.

[0005] 2. Electric defrosting: Use electric heating to provide defrosting heat. By installing a resistance wire of appropriate power on the heat exchanger, when the frost on the evaporator accumulates to a certain level, the resistance wire is energized to heat and melt the frost. Although the defrosting effect is good, the energy consumption of simply using electric defrosting is relatively high and is not suitable for long-term use.

[0006] 3. Reverse defrost: Use a four-way valve to switch the unit from the heating cycle to the defrost cycle, and turn off the fan of the air heat exchanger. The exhaust gas of the compressor enters the evaporator for defrosting. However, this method will cause large temperature fluctuations in the entire refrigeration system, and defrosting takes a long time.

[0007] In summary, the current evaporator defrosting methods have certain disadvantages to a greater or lesser extent, and therefore still need to be improved. Utility Model Content

[0008] To solve the above technical problems, the utility model discloses a multifunctional defrost structure for an evaporator of a refrigeration system, comprising an evaporator body, a heat exchange fan, a drive motor, an electric heating pipe and a water collecting tank, wherein the heat exchange fan is arranged on the top of the evaporator body, the drive motor is arranged at one end of the heat exchange fan, the electric heating pipe is arranged between the evaporator body and the heat exchange fan, and the water collecting tank is arranged at the bottom of the evaporator body.

[0009] Furthermore, a spray pipe is provided between the evaporator body and the heat exchange fan, a circulation pump is provided on one side of the evaporator body, both ends of the circulation pump are connected to the water collecting tank and the spray pipe through pipes respectively, and a plurality of spray holes are provided on the side of the spray pipe facing the evaporator body.

[0010] Furthermore, the electric heating tube is a continuous S-shaped coil structure, and the spray pipe is a U-shaped structure, and the U-shaped spray pipes are staggered between the S-shaped electric heating tubes.

[0011] Furthermore, a three-way solenoid valve is provided on the pipeline between the circulation pump and the water collection tank, two interfaces of the three-way solenoid valve are respectively connected to the pipelines on both sides, and the other interface is connected to the outside.

[0012] Furthermore, a filter is provided on the pipe between the three-way solenoid valve and the water collecting tank, and both ends of the filter are connected to the pipes on both sides in a threaded manner.

[0013] Furthermore, the heat exchange fan is a long cylindrical structure, which includes a plurality of partitions arranged at intervals along the radial direction, and a plurality of arc-shaped fan blades are arranged axially and circumferentially between every two of the partitions.

[0014] Furthermore, a dust cover is provided on the outside of the heat exchange fan, and a dust net is provided at the top opening of the dust cover.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The multifunctional defrosting structure of the utility model performs air defrosting through a heat exchange fan and electric defrosting through an electric heating pipe, and the two can perform combined defrosting. In addition, a spray pipe is used to perform spray defrosting, thereby realizing multifunctional defrosting of the evaporator. The defrosting method can be reasonably selected according to the actual working conditions, and the power consumption can be reduced as much as possible while ensuring the defrosting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a partial structural cross-sectional view of the heat exchange fan in the utility model;

[0020] Figure 3 It is a bottom view of the structure of the electric heating pipe and the spray pipe in the utility model.

[0021] Reference numerals:

[0022] 1-evaporator body, 2-heat exchange fan, 21-partition, 22-arc-shaped fan blade, 3-drive motor, 4-dust cover, 41-dust net, 5-electric heating pipe, 6-spray pipe, 61-spray hole, 7-water collection tank, 8-circulation pump, 9-three-way solenoid valve, 10-filter. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In the description of the embodiments, unless otherwise clearly specified and limited, the terms "disposed", "connected" 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, or an electrical connection; it can be a direct connection, or it can be connected through an intermediate medium, or it can be a communication between two components. 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.

[0026] like Figure 1 As shown, the multifunctional defrost structure of the evaporator of the refrigeration system in this embodiment includes an evaporator body 1, a heat exchange fan 2, a drive motor 3, a dust cover 4, an electric heating pipe 5, a spray pipe 6, a water collection tank 7, a circulation pump 8, a three-way solenoid valve 9 and a filter 10.

[0027] The heat exchange fan 2 is arranged on the top of the evaporator body 1, and the drive motor 3 is arranged at one end of the heat exchange fan 2 to drive the heat exchange fan 2 to rotate; the dust cover 4 is arranged on the outside of the heat exchange fan 2, and a dust net 41 is provided at the top opening of the dust cover 4 to prevent external dust from entering the evaporator body 1.

[0028] like Figure 2 As shown, the heat exchange fan 2 is a long cylindrical structure, which includes a plurality of partitions 21 arranged at intervals along the radial direction, and a plurality of arc-shaped fan blades 22 are arranged axially and circumferentially between every two partitions 21. During the rotation of the heat exchange fan 2, the air above is blown to the evaporator body 1 below, so that the hot air from the outside defrosts the evaporator body 1.

[0029] The electric heating pipe 5 and the spray pipe 6 are arranged between the evaporator body 1 and the heat exchange fan 2. Figure 3 As shown, the electric heating tube 5 is a continuous S-shaped coil structure, the spray pipe 6 is a U-shaped structure, and a plurality of spray holes 61 are provided on the side of the spray pipe 6 facing the evaporator body 1; the U-shaped spray pipes 6 are staggered between the S-shaped electric heating tubes 5, and the heat generated by the electric heating tubes 5 can be partially transferred to the spray pipes 6 to increase the spray water temperature, which is conducive to rapid defrosting.

[0030] The water collecting tank 7 is arranged at the bottom of the evaporator body 1, and the circulating pump 8 is arranged on one side of the evaporator body 1. The two ends of the circulating pump 8 are respectively connected to the water collecting tank 7 and the spray pipe 6 through pipes; the three-way solenoid valve 9 is arranged on the pipe between the circulating pump 8 and the water collecting tank 7; two interfaces of the three-way solenoid valve 9 are respectively connected to the pipes on both sides, and the other interface is connected to the outside world. By switching the valve connection of the three-way solenoid valve 9, the defrost water can be circulated between the evaporator body 1 and the water collecting tank 7, or the waste water can be discharged.

[0031] A filter 10 is also provided on the pipeline between the three-way solenoid valve 9 and the water collecting tank 7 to prevent impurities in the water collecting tank 7 from entering the pipeline. Both ends of the filter 10 are connected to the pipelines on both sides in a threaded manner to facilitate disassembly and replacement.

[0032] The utility model has at least the following three working modes:

[0033] 1. Air defrosting

[0034] When the external environment temperature is higher than the operating temperature of the evaporator body 1, the heat exchange fan 2 starts to work, introducing the external hot air into the evaporator body 1, so that the hot air melts the frost on the surface of the evaporator body 1, and the defrosted water flows along the fins of the evaporator body 1 into the water collecting tank 7 below, which can be kept for standby or discharged.

[0035] 2. Electric defrosting

[0036] When the external environment temperature is not high enough to defrost, the electric heating tube 5 can be powered on to generate high temperature radiation, so that the frost on the upper part of the evaporator body 1 begins to melt first and gradually spreads downward, eventually completely melting the frost on the surface of the evaporator body 1.

[0037] 3. Spray defrost

[0038] The defrosted water is stored in the water collection tank, and the defrosted water can be transported to the spray pipe 6 through the circulation pump 8, and sprayed onto the surface of the evaporator body 1 through the spray hole 61, and the frost is melted by the temperature of the water itself.

[0039] In addition, when one of the above-mentioned methods is not sufficient for defrosting or the defrosting efficiency is low, the above-mentioned defrosting methods can be freely combined to improve the defrosting efficiency and reduce power consumption as much as possible while ensuring the defrosting efficiency.

[0040] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement; when the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the utility model.

Claims

1. A multifunctional defrosting structure for an evaporator of a refrigeration system, characterized in that: It includes an evaporator body, a heat exchange fan, a drive motor, an electric heating pipe and a water collecting tank. The heat exchange fan is arranged on the top of the evaporator body, the drive motor is arranged at one end of the heat exchange fan, the electric heating pipe is arranged between the evaporator body and the heat exchange fan, and the water collecting tank is arranged at the bottom of the evaporator body.

2. The multifunctional defrosting structure of the evaporator of the refrigeration system according to claim 1, characterized in that: A spray pipe is also provided between the evaporator body and the heat exchange fan. A circulation pump is provided on one side of the evaporator body. Both ends of the circulation pump are respectively connected to the water collecting tank and the spray pipe through pipes. A plurality of spray holes are provided on the side of the spray pipe facing the evaporator body.

3. The multifunctional defrosting structure of the evaporator of the refrigeration system according to claim 2, characterized in that: The electric heating tube is a continuous S-shaped coil structure, and the spray pipe is a U-shaped structure. The U-shaped spray pipes are staggered between the S-shaped electric heating tubes.

4. The multifunctional defrosting structure of the evaporator of the refrigeration system according to claim 2, characterized in that: A three-way solenoid valve is arranged on the pipeline between the circulation pump and the water collecting tank, two interfaces of the three-way solenoid valve are respectively connected to the pipelines on both sides, and the other interface is connected to the outside.

5. The multifunctional defrosting structure of the evaporator of the refrigeration system according to claim 4, characterized in that: A filter is also provided on the pipeline between the three-way solenoid valve and the water collecting tank, and both ends of the filter are connected to the pipelines on both sides in a threaded manner.

6. The multifunctional defrosting structure of the evaporator of the refrigeration system according to claim 1, characterized in that: The heat exchange fan is a long cylindrical structure, which includes a plurality of partitions arranged at intervals along the radial direction, and a plurality of arc-shaped fan blades are arranged at intervals along the axial direction and in a circumferential manner between every two of the partitions.

7. The multifunctional defrosting structure of the evaporator of the refrigeration system according to claim 6, characterized in that: A dust cover is also provided on the outside of the heat exchange fan, and a dust net is provided at the top opening of the dust cover.

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