A self-opening and closing anti-freezing, heat-insulating and refrigerating finned tube heat exchanger

Abstract

The present invention provides a self-opening and closing anti-freezing, heat-insulating and refrigerating finned tube heat exchanger, which relates to the field of refrigeration and heat exchange equipment. The self-opening and closing anti-freezing, heat-insulating and refrigerating finned tube heat exchanger includes a housing, and a partition is arranged inside the housing. The side walls of the partition are respectively fixedly connected to the center of the inner side wall of the partition. On the lower inner walls of the housing on the front and rear sides of the partition, support plates are respectively arranged. The lower ends of the two support plates are respectively fixedly connected to the lower inner wall of the housing, and finned tube heat exchanger cores are respectively arranged on the upper end surfaces of the two support plates. By providing a freely rotatable anti-freezing and heat-insulating diaphragm on one side wall of the finned tube heat exchanger core, during use, it is automatically opened by the pressure difference energy of the air flow during ventilation, allowing air to circulate for heat exchange, reducing the use cost, having a simple structure. When not in use, it automatically drops according to its own weight, reducing the defrosting process time and reducing the impact on the air temperature in the cold storage, achieving the purpose of energy conservation.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration and heat exchange equipment, and particularly to a self-opening and closing anti-freezing and heat-insulating refrigeration finned tube heat exchanger. Background Art

[0002] The finned tube heat exchanger is one of the earliest and most successful discoveries in the process of improving tube heat exchange. This method is still the most widely used among all various methods for enhancing heat transfer on tube heat transfer surfaces. It is not only applicable to single finned tube heat exchangers, which are widely used in power, chemical, petrochemical, air conditioning engineering, and refrigeration engineering. For example, the evaporators of cooling fans and frost-free refrigerators used in refrigeration engineering. It is not only applicable to the flow of single-phase fluids, but also has great value for phase change heat transfer. Most finned tube heat exchangers used for clean gases adopt new and efficient fin surface structures, achieving remarkable heat transfer enhancement effects.

[0003] When the refrigeration finned tube heat exchanger works under the environmental conditions of a low-temperature cold room, usually one side of the inlet and outlet air of the finned tube heat exchanger will be directly exposed to the cold room space. When the refrigeration operation stops and there is no ventilation and heat exchange, the exposed side is still in direct contact with the air in the cold room. The water vapor emitted by the items in the cold room and the water vapor invaded when the door is opened will still continue to expose on the fins, resulting in increased frosting, increasing the frosting amount, increasing the heat transfer resistance and affecting the heat exchange efficiency, and increasing the frequency of defrosting of the heat exchanger. When the refrigeration finned tube heat exchanger is defrosting, an external heat source needs to be provided to melt the frost on the surface of the finned tube. However, the exposed side of the heat exchanger will directly dissipate a large amount of heat to the cold room air, causing the temperature of the cold room to rise and fluctuate. The heat load increases, and there is also a risk of freezing during the process of the water film and water droplets formed by defrosting falling along the fin surface due to heat loss. This will make defrosting difficult, extend the defrosting time, and the heat source needs to provide more heat, resulting in a large amount of energy waste.

[0004] Currently, it is usually adopted to install an electric, hydraulic or other forms of mechanical structure on the exposed side of the finned tube heat exchanger to drive and control a baffle structure, or to increase a static pressure box and assemble an electric air valve mechanism to solve the problems of increased frosting and serious heat loss during the defrosting process of the cold finned tube heat exchanger mentioned above. However, these methods require additional energy, increase costs too much, the mechanical structure and control mechanism are complex, and the reliability is very poor under the harsh conditions of a low-temperature cold room, and regular maintenance and repair are required, bringing great inconvenience and trouble to users. Summary of the Invention

[0005] (I) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the present invention provides a self-opening and closing anti-freezing, heat-insulating and refrigerating finned tube heat exchanger, which solves the problems that when the heat exchanger does not refrigerate, frost forms on the surface of the finned tubes, the defrosting frequency increases, serious heat loss occurs during defrosting, the defrosting time is prolonged, the defrosting water freezes, the heat source for defrosting is wasted, the heat in the cold storage room fluctuates and increases, and energy waste is not conducive to energy conservation and consumption reduction.

[0007] (2) Technical solution

[0008] To achieve the above object, the present invention is realized through the following technical solutions: A self-opening and closing anti-freezing, heat-insulating and refrigerating finned tube heat exchanger, including a housing, a partition is arranged inside the housing, the side walls of the partition are respectively fixedly connected to the center of the inner side wall of the partition, and supporting plates are respectively arranged on the lower inner walls of the housing on the front and rear sides of the partition, the lower ends of the two supporting plates are respectively fixedly connected to the lower inner wall of the housing, finned tube heat exchanger cores are respectively arranged on the upper end surfaces of the two supporting plates, the lower ends of the two finned tube heat exchanger cores are respectively fixedly connected to the upper end surfaces of the two supporting plates, a plurality of round holes are respectively arranged on one side wall of the two finned tube heat exchanger cores near the two edges, support rods are respectively arranged inside the plurality of round holes, moving holes are respectively arranged on the side walls of the plurality of support rods, anti-freezing and heat-insulating diaphragms are respectively arranged between every two horizontally arranged support rods, rotating connectors are respectively arranged at the front and rear ends of the anti-freezing and heat-insulating diaphragm, and the rotating connectors at the front and rear ends of the anti-freezing and heat-insulating diaphragm are respectively rotatably connected to the moving holes on the side walls of the support rods on both sides. Air inlets are symmetrically arranged on one side wall of the housing, fans are respectively arranged inside the two air inlets, and the two fans are respectively fixedly connected to the inner side walls of the two air inlets.

[0009] Preferably, protective nets are respectively arranged on the inner side walls of the two air inlets near the edges, and the side walls of the two protective nets are respectively fixedly connected to the inner side walls of the two air inlets.

[0010] Preferably, handles are respectively arranged at the centers of the front and rear side walls of the housing, and rubber pads are respectively arranged on the inner side walls of the two handles.

[0011] Preferably, three connecting plates are arranged on the upper end surface of the housing, the three connecting plates are all connected to the upper end surface of the housing by welding, and mounting holes are respectively arranged at the centers of the upper end surfaces of the three connecting plates near the two edges.

[0012] Preferably, the support rods and the round holes are connected by threads.

[0013] Preferably, air curtains are symmetrically arranged on the other side wall of the housing.

[0014] Preferably, the cross-sectional shape of the moving hole is T-shaped, and the size of the moving hole is larger than the size of the rotating connector.

[0015] Preferably, the material of the housing is aluminized zinc plate, and the surface is coated with an anti-static coating.

[0016] Working principle: A plurality of round holes 12 are respectively arranged on both side edges of one side wall of the finned tube heat exchanger core 10. Support rods 14 are respectively arranged inside the plurality of round holes 12. The support rods 14 and the round holes 12 are connected by threads, which is convenient for disassembling and assembling the support rods 14. Moving holes 16 are respectively arranged on the side walls of the plurality of support rods 14. An antifreeze and heat insulation diaphragm 13 is arranged between every two horizontally arranged support rods 14. The antifreeze and heat insulation diaphragm 13 is a thin diaphragm made of a low-density material. Rotating connectors 15 are respectively arranged at the front and rear ends of the antifreeze and heat insulation diaphragm 13. The rotating connectors 15 at the front and rear ends of the antifreeze and heat insulation diaphragm 13 are respectively rotatably connected in the moving holes 16 on the side walls of the support rods 14 on both sides. When hanging naturally, the upper and lower parts of the plurality of antifreeze and heat insulation diaphragms 13 are arranged in an end-to-end overlapping manner to form a heat insulation curtain. When the refrigerating finned tube heat exchanger core 10 does not perform refrigeration operation, that is, when there is no ventilation, the plurality of antifreeze and heat insulation diaphragms 13 fall freely under the action of gravity and form a relatively enclosed space with other parts of the refrigerating finned tube heat exchanger core 10 and the housing 1, which is relatively isolated from the cold room air to reduce the condensation of water vapor in the air on the surface of the finned tube into frost. It is a barrier layer between the internal space of the heat exchanger and the external air, a relatively enclosed space. During defrosting, a local small environmental space is formed inside the refrigerating finned tube heat exchanger. There is no direct heat loss, which can quickly raise the temperature of the internal heat exchanger core and accelerate the melting of the frost layer, and can prevent the melted water from freezing. In this way, the defrosting process time is reduced, the influence on the temperature of the cold room air is reduced, and the energy-saving purpose is achieved. When the refrigerating finned tube heat exchanger core 10 is performing refrigeration work, that is, when there is ventilation, no additional mechanical structure and energy are required. The antifreeze and heat insulation diaphragm 13 automatically opens by using the pressure difference energy of the air flow during ventilation, allowing the air to circulate for heat exchange, reducing the use cost and having a simple structure.

[0017] (III) Beneficial effects

[0018] The present invention provides a self-opening and closing antifreeze and heat insulation refrigerating finned tube heat exchanger. It has the following beneficial effects:

[0019] 1. In the present invention, a heat insulation curtain is formed by arranging multiple layers of thin diaphragms made of low-density materials in an overlapping manner from head to tail on the exposed side of the chip of the refrigeration finned tube heat exchanger. When the refrigeration finned tube heat exchanger does not operate for refrigeration, i.e., without ventilation, the multiple layers of thin diaphragms fall freely under the action of gravity to form a relatively enclosed space with other parts of the housing of the refrigeration finned tube heat exchanger, which is relatively isolated from the cold room air, reducing the condensation of water vapor in the air on the surface of the finned tubes into frost. It is a barrier layer between the internal space of the heat exchanger and the external air, a relatively enclosed space. During defrosting, a local small environmental space is formed inside the refrigeration finned tube heat exchanger. There is no direct heat loss, which can quickly increase the temperature of the internal heat exchanger core, accelerate the melting of the frost layer, and prevent the melted water from freezing. In this way, the defrosting process time is reduced, the influence on the temperature of the cold room air is alleviated, and the energy-saving purpose is achieved.

[0020] 2. In the present invention, when the refrigeration finned tube heat exchanger is operating for refrigeration, i.e., under ventilation conditions, without additional mechanical structures and energy, the thin diaphragms are automatically opened by using the pressure difference energy of the air flow during ventilation to allow air circulation for heat exchange, reducing the use cost and having a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is a top view of the present invention;

[0023] Figure 3 is a rear view of the present invention;

[0024] Figure 4 is a cross-sectional view taken along line A-A in the present invention;

[0025] Figure 5 is a cross-sectional view taken along line B-B in the present invention;

[0026] Figure 6 is a cross-sectional view of the connection between the anti-freezing and heat insulation diaphragm and the support rod in the present invention;

[0027] Figure 7 is an axonometric view of the support rod in the present invention.

[0028] Among them, 1. housing; 2. handle; 3. connecting plate; 4. mounting hole; 5. air curtain; 6. air inlet; 7. protective net; 8. fan; 9. partition board; 10. finned tube heat exchanger core; 11. support plate; 12. round hole; 13. anti-freezing and heat insulation diaphragm; 14. support rod; 15. rotating connecting piece; 16. movable hole. DETAILED DESCRIPTION OF THE INVENTION

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1:

[0031] As Figure 1-7 shown, the embodiment of the present invention provides a self-opening and closing anti-freezing, heat-insulating and refrigerating finned tube heat exchanger, which includes a housing 1. A partition 9 is arranged inside the housing 1. The side walls of the partition 9 are respectively fixedly connected to the center of the inner side wall of the partition 9. On the lower inner walls of the housing 1 on the front and rear sides of the partition 9, support plates 11 are respectively arranged. The lower ends of the two support plates 11 are respectively fixedly connected to the lower inner wall of the housing 1. On the upper end faces of the two support plates 11, finned tube heat exchanger cores 10 are respectively arranged. The lower ends of the two finned tube heat exchanger cores 10 are respectively fixedly connected to the upper end faces of the two support plates 11. On one side wall of the two finned tube heat exchanger cores 10, near the two edges, a plurality of round holes 12 are respectively arranged. Inside the plurality of round holes 12, support rods 14 are respectively arranged. The support rods 14 and the round holes 12 are connected by threads, which is convenient for disassembling and assembling the support rods 14. On the side walls of the plurality of support rods 14, moving holes 16 are respectively arranged. Between every two horizontally arranged support rods 14, an anti-freezing and heat-insulating membrane 13 is respectively arranged. The anti-freezing and heat-insulating membrane 13 is a thin membrane made of a low-density material. The front and rear ends of the anti-freezing and heat-insulating membrane 13 are respectively provided with rotating connectors 15. The front and rear ends of the anti-freezing and heat-insulating membrane 13 and the rotating connectors 15 are respectively rotatably connected to the moving holes 16 on the side walls of the support rods 14 on both sides. When hanging naturally, the upper and lower parts of the plurality of anti-freezing and heat-insulating membranes 13 are arranged in a head-to-tail overlapping manner to form a heat-insulating curtain. On one side wall of the housing 1, air inlets 6 are symmetrically arranged. Inside the two air inlets 6, fans 8 are respectively arranged. The two fans 8 are respectively fixedly connected to the inner side walls of the two air inlets 6. On the inner side walls of the two air inlets 6, near the edges, protective nets 7 are respectively arranged. The side walls of the two protective nets 7 are respectively fixedly connected to the inner side walls of the two air inlets 6.

[0032] At the centers of the front and rear side walls of the housing 1, handles 2 are respectively provided. Rubber pads are respectively provided on the inner side walls of the two handles 2, which facilitates the handling of the whole housing 1. The rubber pads can effectively protect the hands. On the upper end surface of the housing 1, three connecting plates 3 are provided. Welding connections are adopted between the three connecting plates 3 and the upper end surface of the housing 1. At the centers of the upper end surfaces of the three connecting plates 3, near the two side edges respectively, mounting holes 4 are provided. The setting of the three connecting plates 3 leaves a certain gap between the lower end surface of the housing 1 and the ground, reducing the damage to the lower end surface of the housing 1 when placed. On the other side wall of the housing 1, air curtains 5 are symmetrically provided. The cross-sectional shape of the moving hole 16 is T-shaped, and the size of the moving hole 16 is larger than the size of the rotating connecting member 15, which enables the rotating connecting member 15 to freely rotate inside the moving hole 16. The material of the housing 1 is aluminized zinc plate, which increases the overall anti-corrosion and rust resistance, and an anti-static coating is applied on the surface.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-opening and closing anti-freezing, heat-insulating and refrigerating finned tube heat exchanger, comprising a housing (1), characterized in that: Inside the housing (1), a partition plate (9) is provided. The side walls of the partition plate (9) are respectively fixedly connected to the center of the inner side wall of the partition plate (9). On the lower inner walls of the housing (1) on the front and rear sides of the partition plate (9), support plates (11) are respectively provided. The lower ends of the two support plates (11) are respectively fixedly connected to the lower inner wall of the housing (1). On the upper end surfaces of the two support plates (11), finned tube heat exchanger cores (10) are respectively provided. The lower ends of the two finned tube heat exchanger cores (10) are respectively fixedly connected to the upper end surfaces of the two support plates (11). On one side wall of the two finned tube heat exchanger cores (10), near the two edges, a plurality of round holes (12) are respectively provided. Inside the plurality of round holes (12), support rods (14) are respectively provided. On the side walls of the plurality of support rods (14), movable holes (16) are respectively provided. Between every two horizontally arranged support rods (14), an anti-freezing and heat-insulating membrane (13) is respectively provided. The front and rear ends of the anti-freezing and heat-insulating membrane (13) are respectively provided with rotating connectors (15). The rotating connectors (15) at the front and rear ends of the anti-freezing and heat-insulating membrane (13) are respectively rotatably connected to the movable holes (16) on the side walls of the support rods (14) on both sides. On one side wall of the housing (1), air inlets (6) are symmetrically provided. Inside the two air inlets (6), fans (8) are respectively provided. The two fans (8) are respectively fixedly connected to the inner side walls of the two air inlets (6); On the inner side walls of the two air inlets (6), near the edges, protective nets (7) are respectively provided. The side walls of the two protective nets (7) are respectively fixedly connected to the inner side walls of the two air inlets (6). At the centers of the front and rear side walls of the housing (1), handles (2) are respectively provided. On the inner side walls of the two handles (2), rubber pads are respectively provided.

2. The self-opening and closing anti-freezing, heat-insulating and refrigerating finned tube heat exchanger according to claim 1, wherein: On the upper end surface of the housing (1), three connecting plates (3) are provided. Between the three connecting plates (3) and the upper end surface of the housing (1), welding connections are all adopted. Near the two edges at the centers of the upper end surfaces of the three connecting plates (3), mounting holes (4) are respectively provided.

3. The self-opening and closing anti-freezing, heat-insulating and refrigerating finned tube heat exchanger according to claim 1, characterized in that: Between the support rod (14) and the round hole (12), a threaded connection is adopted.

4. A self-opening and closing anti-freezing, heat-insulating and refrigerating finned tube heat exchanger according to claim 1, characterized in that: On the other side wall of the housing (1), air curtains (5) are symmetrically provided.

5. The self-opening and closing anti-freezing, heat-insulating and refrigerating finned tube heat exchanger according to claim 1, wherein: The cross-sectional shape of the movable hole (16) is T-shaped, and the size of the movable hole (16) is larger than the size of the rotating connector (15).

6. The self-opening and closing anti-freezing, heat-insulating and refrigerating finned tube heat exchanger according to claim 1, wherein: The material of the housing (1) is aluminized zinc plate, and an anti-static coating is applied on the surface.

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