An automatic defrosting ceiling-mounted air cooler

Abstract

This utility model discloses an automatic defrosting ceiling-mounted evaporative air cooler, relating to the field of evaporative air cooler technology. It includes a housing with a cavity inside. Multiple movable heat exchange tubes are arranged within the cavity. Several vertically arranged fins are fixedly connected within the cavity. The heat exchange tubes penetrate the fins. Each fin has a corresponding circular hole for the heat exchange tube, and the heat exchange tube does not directly contact the fin. A heat-conducting sleeve is arranged within each circular hole, and the heat-conducting sleeve is fixedly fitted onto the heat exchange tube. The outer circumferential wall of the heat-conducting sleeve directly contacts and is movably connected to the inner wall of the circular hole. Two electric heating tubes are arranged between adjacent heat exchange tubes, and the electric heating tubes penetrate the fins. Support plates are inserted at both ends of the heat exchange tubes along the length of the cavity. The heat exchange tubes are fixedly connected to the support plates, and the support plates are slidably sealed to the inner wall of the housing. This device improves the defrosting efficiency of the evaporative air cooler.

Description

Technical Field

[0001] This utility model relates to the field of air cooler technology, specifically to an automatic defrosting ceiling-mounted air cooler. Background Technology

[0002] Evaporative air coolers are divided into industrial evaporative air coolers and household evaporative air coolers. Industrial evaporative air coolers are generally used in cold storage and cold chain logistics refrigeration environments. Household evaporative air coolers, also known as water-cooled air conditioners, are evaporative cooling and ventilation units that integrate cooling, ventilation, dust prevention, deodorization, and humidification.

[0003] Traditional ceiling-mounted evaporative air coolers are prone to frost buildup on their fins under low temperature and high humidity conditions. The frost layer increases air resistance and reduces heat exchange efficiency, requiring periodic shutdowns for manual defrosting or the use of conventional electric heating for defrosting.

[0004] Existing electric heating defrosting solutions typically place the heating element near the fins or heat exchange tubes. When the temperature rises, the heat exchange tubes remain thermally coupled with the fins, resulting in a large amount of heat being carried away by the refrigerant, leading to high defrosting energy consumption and long defrosting time.

[0005] Therefore, it is necessary to design an automatic defrosting ceiling-mounted air cooler to improve the defrosting efficiency of the air cooler. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing an automatic defrosting ceiling-mounted air cooler to solve the problems mentioned in the background section.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an automatic defrosting ceiling-mounted air cooler, including a housing, a cavity inside the housing, a plurality of movable heat exchange tubes arranged in the cavity, and a plurality of vertically arranged fins fixedly connected in the cavity. The heat exchange tubes penetrate the fins, and each fin has a circular hole corresponding to the heat exchange tube. The heat exchange tubes do not directly contact the fins. A heat-conducting sleeve is arranged in each circular hole. The heat-conducting sleeve is fixedly sleeved on the heat exchange tube. The outer circumferential wall of the heat-conducting sleeve directly contacts and is movably connected to the inner wall of the circular hole. Two electric heating tubes are arranged between two adjacent heat exchange tubes, and the electric heating tubes penetrate the fins.

[0008] This utility model further illustrates that support plates are provided at both ends of the heat exchange tube along the length of the cavity, the heat exchange tube is fixedly connected to the support plates, the support plates are slidably sealed to the inner wall of the shell, and electric push rods are provided at the four corners of the two support plates on opposite sides. The fixed end of the electric push rod is fixedly connected to the inner wall of the cavity, and the output end of the electric push rod is fixedly connected to the support plate.

[0009] This invention further explains that the length of the heat-conducting sleeve is less than the distance between the two fins.

[0010] The present invention further explains that each heat exchange tube includes several U-shaped tubes, which are arranged linearly and uniformly along the width direction of the shell. Each U-shaped tube is vertically arranged with its U-shaped opening facing one end of the shell along the length direction. Each heat exchange tube also includes several bends, which are horizontally arranged and connect the multiple U-shaped tubes in the arrangement order.

[0011] This utility model further explains that the inlet of the first U-shaped tube of the plurality of heat exchange tubes, which is not connected to the bend, is connected to the liquid inlet manifold through a flexible hose, and the inlet of the last U-shaped tube of the plurality of heat exchange tubes, which is not connected to the bend, is connected to the liquid outlet manifold through a flexible hose.

[0012] The present invention further explains that a cooling cavity is formed between the two support plates and the shell, and a heat insulation cavity is formed between the two support plates on opposite sides and the shell. The liquid inlet manifold and the liquid outlet manifold are both located in the same heat insulation cavity.

[0013] This utility model further illustrates that a fixing rod is provided at each of the four corners of several of the fins. The length direction of the fixing rod is consistent with the length direction of the shell. The fixing rod is fixedly connected to the inner wall of the cavity. A limiting groove is opened on the fixing rod at the right angle corresponding to the fin, so that the fin can be inserted into the limiting groove.

[0014] The present invention further describes that an air inlet is provided at one end of the cavity along the width direction of the shell. The air inlet is rectangular and a filter screen is installed inside the air inlet. Two air outlets are provided at the end of the cavity away from the air inlet along the width direction of the shell. The cross-sectional shape of the two air outlets is circular and a fan is installed inside the air outlets. A water tank is provided at the bottom of the shell and a water outlet pipe is connected to the water tank.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: In this utility model, the heat exchange tube and the heat-conducting sleeve are pulled away from the fins by an electric push rod, and an air insulation layer is formed between the heat exchange tube and the fins, so that almost all the heat of the electric heating tube is used for defrosting, thereby improving the defrosting efficiency.

[0016] Since the heat exchange tubes no longer participate in defrosting heat exchange, the heating power of the electric heating tubes can be reduced, thus lowering the overall energy consumption. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a top view of the overall structure of this utility model from the front.

[0019] Figure 2 This is a top view of the overall structure of this utility model from the rear (excluding the top cover of the shell).

[0020] Figure 3 This is a schematic diagram of the heat exchange tube and related structures of this utility model;

[0021] Figure 4 This is a schematic diagram of the fins and related structures of this utility model;

[0022] In the diagram: 1. Shell; 2. Air inlet; 3. Air outlet; 4. Fan; 5. Heat exchange tube; 6. U-shaped tube; 7. Bend; 8. Liquid inlet main pipe; 9. Liquid outlet main pipe; 10. Support plate; 11. Insulation cavity; 12. Intermediate plate; 13. Cold air cavity; 14. Fin; 15. Fixing rod; 16. Limiting groove; 17. Round hole; 18. Heat-conducting sleeve; 19. Electric push rod; 20. Electric heating tube. Detailed Implementation

[0023] The following detailed, non-limiting description of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] Please see Figure 1-4 The present invention provides a technical solution: an automatic defrosting ceiling-mounted air cooler, comprising a housing 1, a cavity inside the housing 1, an air inlet 2 at one end of the cavity along the width direction of the housing 1, the air inlet 2 being rectangular, a filter screen installed inside the air inlet 2, two air outlets 3 at the end of the cavity away from the air inlet 2 along the width direction of the housing 1, the cross-sectional shape of the two air outlets 3 being circular, a fan 4 installed inside the air outlets 3, the fan being conventional technology, a water tank at the bottom of the housing 1, and a water outlet pipe connected to the water tank.

[0025] Multiple heat exchange tubes 5 are arranged linearly in the vertical direction inside the cavity. Each heat exchange tube 5 includes several U-shaped tubes 6, which are arranged linearly and uniformly along the width direction of the shell 1. Each U-shaped tube 6 is vertically arranged with the U-shaped opening facing one end of the shell 1 along the length direction.

[0026] Each heat exchange tube 5 also includes multiple bends 7, each bend 7 is set horizontally, and multiple U-shaped tubes 6 are connected in a certain order to form a complete heat exchange tube 5.

[0027] Among them, the inlet of the first U-shaped tube 6 of multiple heat exchange tubes 5, which is not connected to the bend 7, is connected to the liquid inlet main pipe 8 through a flexible hose, and the inlet of the last U-shaped tube 6 of multiple heat exchange tubes 5, which is not connected to the bend 7, is connected to the liquid outlet main pipe 8 through a flexible hose.

[0028] The refrigerant enters the heat exchange tube 5 through the liquid inlet manifold 8 to complete the heat exchange, and then flows out through the liquid outlet manifold 8 for recirculation, thus achieving continuous heat exchange in the heat exchange tube 5.

[0029] Support plates 10 are installed at both ends of the heat exchange tube 5 along the length of the cavity, and the heat exchange tube 5 is fixedly connected to the support plates 10.

[0030] A cooling cavity is formed between the two support plates 10 and the shell 1. A heat insulation cavity 11 is formed between the two support plates 10 and the shell 1 on opposite sides. The liquid inlet pipe 8 and the liquid outlet pipe 8 are both located in the same heat insulation cavity 11.

[0031] A middle plate 12 is provided at the center of the cooling chamber along its length. The heat exchange tube 5 passes through the middle plate 12 and is fixedly connected to the middle plate 12. The middle plate 12 supports the heat exchange tube 5 of the cooling chamber and divides the cooling chamber into two cold air chambers 13.

[0032] Each cold air cavity 13 is provided with several vertically arranged fins 14, which are linearly and uniformly arranged along the length of the shell 1.

[0033] A fixing rod 15 is provided at each of the four corners of several fins 14. The length direction of the fixing rod 15 is consistent with the length direction of the shell 1. The fixing rod 15 is fixedly connected to the inner wall of the cavity. The fixing rod 15 is provided with a limiting groove 16 at the right angle corresponding to the fin 14, so that the fin 14 can be inserted into the limiting groove 16, thereby limiting and fixing the fin 14.

[0034] Each fin 14 has a corresponding heat exchange tube 5 with a round hole 17, and the heat exchange tube 5 does not directly contact the fin 14.

[0035] Each circular hole 17 is provided with a heat-conducting sleeve 18, which is sleeved on the heat exchange tube 5. The inner circumferential wall of the heat-conducting sleeve 18 is in direct contact with and fixedly connected to the outer wall of the heat exchange tube 5, and the outer circumferential wall of the heat-conducting sleeve 18 is in direct contact with and movably connected to the inner wall of the circular hole 17. The length of the heat-conducting sleeve 18 is less than the distance between the two fins 14.

[0036] The support plate 10 and the intermediate plate 12 are slidably sealed to the inner wall of the shell 1. Each of the four corners of the two support plates 10 is provided with an electric push rod 19. The fixed end of the electric push rod 19 is fixedly connected to the inner wall of the cavity, and the output end of the electric push rod 19 is fixedly connected to the support plate 10. The electric push rod 19 drives the support plate 10 and the heat exchange tube 5 to move, thereby controlling whether the heat conduction sleeve 18 contacts the fins 14.

[0037] Two electric heating tubes 20 are provided between each of two adjacent heat exchange tubes 5. The electric heating tubes 20 pass through the fins 14 and are movably connected to the fins 14. The outer wall of the electric heating tubes 20 is in direct contact with the fins 14. The electric heating tubes 20 pass through the support plate 10 and the intermediate plate 12. The electric heating tubes 20 are not in contact with the support plate 10 and the intermediate plate 12.

[0038] In this embodiment, when the fins 14 are frosted, the electric push rod 19 drives the support plate 10 and the heat exchange tube 5 to move. The heat-conducting sleeve 18 moves to a position between two adjacent fins 14, so that the heat-conducting sleeve 18 does not contact the fins 14. The electric heating tube 20 heats the fins 14. Because the heat-conducting sleeve 18 does not contact the fins 14, the heat exchange tube 5 does not participate in the heat exchange of the fins 14, thereby improving the heating efficiency of the electric heating tube 20 on the fins 14 and reducing the defrosting time.

[0039] At the same time, the fan 4 is reversed. Under the action of the filter, the air resistance in the cold air cavity 13 increases and the air speed decreases, which enables the cold air cavity 13 to heat up quickly and accelerate the defrosting efficiency.

[0040] After the frost on the fin 14 melts into water, it falls down the fin 14 into the water tank and eventually flows out from the outlet pipe. During this process, the melted water will not come into contact with the heat exchange tube 5, so that the surface of the heat exchange tube 5 remains dry and without water film residue. When the cooling is resumed immediately after defrosting, the residual water droplets will not freeze again due to the cold, thus significantly reducing the "re-frost" phenomenon, maintaining stable heat exchange efficiency, and extending the next defrosting interval.

[0041] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A ceiling type air cooler of automatic defrosting type, characterized in that: The device includes a housing (1), which has a cavity. Multiple movable heat exchange tubes (5) are installed in the cavity. Several vertically arranged fins (14) are fixedly connected in the cavity. The heat exchange tubes (5) penetrate the fins (14). Each fin (14) has a circular hole (17) corresponding to the heat exchange tube (5). The heat exchange tubes (5) do not directly contact the fins (14). Each circular hole (17) is provided with a heat-conducting sleeve (18). The heat-conducting sleeve (18) is fixedly fitted on the heat exchange tube (5). The outer circumferential wall of the heat-conducting sleeve (18) is in direct contact with and movably connected to the inner wall of the circular hole (17). Two electric heating tubes (20) are provided between two adjacent heat exchange tubes (5). The electric heating tubes (20) penetrate the fins (14).

2. The ceiling type air cooler of claim 1, wherein: The heat exchange tube (5) has support plates (10) at both ends along the length of the cavity. The heat exchange tube (5) is fixedly connected to the support plate (10). The support plate (10) is slidably sealed to the inner wall of the shell (1). Electric push rods (19) are provided at the four corners of the two support plates (10) on opposite sides. The fixed end of the electric push rod (19) is fixedly connected to the inner wall of the cavity. The output end of the electric push rod (19) is fixedly connected to the support plate (10).

3. The ceiling type air cooler of claim 2, wherein: The length of the heat-conducting sleeve (18) is less than the distance between the two fins (14).

4. The ceiling type air cooler of claim 3, wherein: Each heat exchange tube (5) includes several U-shaped tubes (6), which are arranged linearly and uniformly along the width direction of the shell (1). Each U-shaped tube (6) is vertically arranged with the U-shaped opening facing one end of the shell (1) along the length direction. Each heat exchange tube (5) also includes several bends (7), which are horizontally arranged and connect the multiple U-shaped tubes (6) in the arrangement order.

5. The ceiling type air cooler of claim 4, wherein: The inlet of the first U-shaped tube (6) of the multiple heat exchange tubes (5) without the bend (7) is connected to the liquid inlet manifold (8) through a hose, and the inlet of the last U-shaped tube (6) of the multiple heat exchange tubes (5) without the bend (7) is connected to the liquid outlet manifold (9) through a hose.

6. The ceiling type air cooler of claim 5, wherein: A cooling cavity is formed between the two support plates (10) and the shell (1), and a heat insulation cavity (11) is formed between the two support plates (10) on opposite sides and the shell (1). The liquid inlet manifold (8) and the liquid outlet manifold (9) are both located in the same heat insulation cavity (11).

7. The ceiling type air cooler of claim 6, wherein: A fixing rod (15) is provided at each of the four corners of several of the fins (14). The length direction of the fixing rod (15) is consistent with the length direction of the shell (1). The fixing rod (15) is fixedly connected to the inner wall of the cavity. The fixing rod (15) is provided with a limiting groove (16) at the right angle of the fin (14) so ​​that the fin (14) can be inserted into the limiting groove (16).

8. The ceiling type air cooler of claim 7, wherein: An air inlet (2) is provided at one end of the cavity along the width direction of the shell (1). The air inlet (2) is rectangular and a filter screen is installed inside the air inlet (2). Two air outlets (3) are provided at one end of the cavity along the width direction of the shell (1) away from the air inlet (2). The cross-sectional shape of the two air outlets (3) is circular. A fan (4) is installed inside the air outlets (3). A water tank is provided at the bottom of the shell (1), and the water tank is connected to a water outlet pipe.

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