WO2020010907A1

WO2020010907A1 - High-efficiency low-noise fin evaporator

Info

Publication number: WO2020010907A1
Application number: PCT/CN2019/085471
Authority: WO
Inventors: 成家伟
Original assignee: 佛山嘉森电器有限公司
Priority date: 2018-07-13
Filing date: 2019-05-05
Publication date: 2020-01-16
Also published as: CN208652988U

Abstract

Provided is a high-efficiency low-noise fin evaporator, comprising a gas-liquid separator (1); the lower end of the gas-liquid separator (1) is provided with an oil return hole (12); the upper end of the oil-return hole (12) is connected to a connecting pipe (11); a gas return pipe (4) and a capillary pipe (5) are fixedly connected to the lower end of the oil return hole (12); the outer surface of the gas return pipe (4) and the capillary pipe (5) is covered with an aluminum film and then tightly wrapped by a heat shrink tube (3); a gradient silencer tube (10) is mounted on the upper end of the capillary pipe (5); the outer surface of the gradient silencer pipe (10) is equipped with a damping butyl rubber (9); the outer surface of the damping butyl rubber (9) is fixedly equipped with a rubber tube (2); the rubber tube (2) begins wrapping at the interface of the capillary pipe (5) and the gradient silencer (10).

Description

Efficient low-noise fin evaporator

Technical field

The utility model relates to the field of finned evaporators, in particular to a highly efficient and low noise finned evaporator.

Background technique

The evaporator is a very important part of the four major pieces of refrigeration, and it is also a type of wall heat exchange equipment. The low-temperature condensed "liquid" body exchanges heat with the outside air through the evaporator, and "gas" absorbs heat to achieve the effect of cooling. The evaporator is divided into three types: normal pressure, pressurization and decompression according to the operating pressure. Finned evaporator is the most widely used heat exchange equipment in gas and liquid heat exchangers.

In the early stage of frost on the evaporator surface, the latent heat is released when the frost layer is formed, and the roughness and heat transfer area of the heat transfer surface are increased, which enhances the heat transfer capacity of the evaporator (when the equivalent diameter of the pipeline is less than the critical At the thermal insulation radius, the accumulation of frost layer promotes the heat exchange between the refrigerant and the air, and when it is larger than the critical thermal insulation radius, the frost layer hinders the heat exchange between the refrigerant and the air).

With the thickening of the frost layer, the effective air circulation area between the fins decreases, which increases the air flow resistance and reduces the air flow. The heat transfer heat resistance between the working medium and the air in the evaporator is increased, thereby deteriorating the heat transfer of the evaporator. Under the heat absorption capacity of the working medium from the air, the cooling capacity is reduced, and the cooling temperature is difficult. Consumption increases and cooling efficiency decreases.

Because the air's heat transfer ability to the working medium in the evaporator is weakened, the liquid working medium in the evaporator may not be able to absorb heat and vaporize completely, causing the working medium liquid to enter the compressor, causing liquid hammer and damaging the compressor.

The fins of the fin evaporators currently used in the industry are rectangular. The distance between the fins and the fins is too small to easily form a water bridge, frost, and icing. If the distance is too large, the efficiency is low. Small particles of water droplets are still attached to the fins. The bottom of the fins is a flat defrosting. After the fins there will be many water droplets hanging on the fins. After cooling, they will form ice particles. Defrosting will occur easily when defrosting again. The noise is caused by dirty and falling ice particles.

Utility model content

The purpose of the present utility model is to provide a high-efficiency and low-noise fin evaporator to solve the problems raised in the background art mentioned above.

To achieve the above objective, the present invention provides the following technical solutions:

An efficient low-noise fin evaporator includes a gas-liquid separator, an oil return hole is provided at the lower end of the gas-liquid separator, a connection pipe is connected to the upper end of the oil return hole, and an air return pipe is fixedly connected to the lower end of the oil return hole and The capillary tube, the return tube and the outer surface of the capillary tube are covered with an aluminum film and then tightly wrapped by a heat-shrinkable tube. The upper end of the capillary tube is provided with a gradation muffler tube, and the outer surface of the gradation muffler tube is provided with a damping butyl rubber. The surface of the rubber-plastic pipe is fixedly installed. The rubber-plastic pipe is wrapped from the capillary and the gradual muffler pipe interface to the fixed end plate of the evaporator, and wraps the entire gradual muffler pipe and connecting pipe. The other end of the rubber-plastic pipe is inside It is fixedly connected to the evaporation tube. Aluminum fins are fixed on the surface of the evaporation tube, and fixed brackets are installed on the left and right sides of the aluminum fin.

As a further solution of the present utility model, mounting brackets are fixedly connected to the upper and lower sides of the evaporation tube, and the number of the mounting brackets is four.

As a further solution of the present invention, the upper end of the connecting pipe is located in the middle of the gas-liquid separator.

As a further solution of the present utility model, a surface of the evaporation tube is provided with a layer of hydrophobic coating.

Compared with the prior art, the beneficial effects of the present utility model are:

1. Reduce refrigerant emission noise.

2. Reduce the noise generated when the evaporator defrosts.

3. Applying a layer of hydrophobic coating and chamfering to the surface of the evaporation tube and aluminum fins can reduce the amount of water remaining after the defrosting of the evaporator, reduce the amount of ice in the evaporator, improve the evaporation heat transfer efficiency, and reduce the power consumption.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a high-efficiency and low-noise fin evaporator.

Figure 2 is a side view of a high-efficiency, low-noise finned evaporator.

Fig. 3 is a schematic cross-sectional view of the T-T structure in Fig. 2.

FIG. 4 is a schematic cross-sectional view of the S-S structure in FIG. 2.

In the picture: 1-gas-liquid separator, 2-rubber-plastic tube, 3-heat-shrinkable tube, 4-return gas tube, 5-capillary tube, 6-aluminum fin, 7-evaporation tube, 8-mounting bracket, 9- Damping butyl rubber, 10-gradient muffler, 11-connecting pipe, 12-oil return hole.

detailed description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of them. example. Based on the embodiments of the present invention, all other embodiments obtained by a person having ordinary skill in the art without making creative work belong to the protection scope of the present invention.

Please refer to FIGS. 1-4. A high-efficiency, low-noise fin evaporator includes a gas-liquid separator 1. An oil return hole 12 is provided at a lower end of the gas-liquid separator 1, and a connection pipe 11 is connected to an upper end of the oil return hole 12, An air return pipe 4 and a capillary tube 5 are fixedly connected to the lower end of the oil return hole 12. The outer surface of the air return pipe 4 and the capillary tube 5 is covered with an aluminum film and then tightly wrapped by a heat shrinkable sleeve 3. An upper end of the capillary tube 5 is provided with a gradual noise reduction. The outer surface of the pipe 10 and the gradual muffler pipe 10 is provided with a damping butyl rubber 9, and the outer surface of the damping butyl rubber 9 is fixedly installed with a rubber-plastic pipe 2. The rubber-plastic pipe 2 is wrapped from the capillary 5 and the gradual muffler 10 to the interface. The end of the fixed end plate of the evaporator wraps the entire gradual muffler pipe 10 and the connecting pipe 11. The upper end of the connecting pipe 11 is located in the middle of the gas-liquid separator 1, and the other end of the rubber-plastic pipe 2 is fixedly connected to the evaporation pipe 7. Aluminium fins 6 are fixedly installed on the surface of the evaporation tube 7, and fixed brackets are installed on the left and right sides of the aluminum fins 6. The evaporation tubes 7 are fixedly connected with mounting brackets 8 on the upper and lower sides. The number of the mounting brackets 8 is four. A layer of hydrophobic coating is provided on the surface of the evaporation tube 7.

The refrigerant is throttled and reduced by the capillary tube 5 and enters the gradual muffler tube 10. The outer wall of the gradual muffler tube 10 is covered with a damping butyl rubber 9, and the outer layer is covered with a rubber-plastic tube 2. 9. After several levels of noise reduction, such as rubber and plastic pipes, the refrigerant emission noise can be greatly reduced. The refrigerant enters the evaporation pipe 7 and evaporates. The cooling capacity is transferred from the evaporation pipe 7 to the aluminum fins 6 to increase the evaporation area. After the 7 flows out, it enters the gas-liquid separator 1. The gas-liquid separator 1 separates the liquid refrigerant and the gaseous refrigerant that are not completely evaporated by the evaporation tube 7. The liquid refrigerant enters the compression after the gas-liquid separator 1 evaporates to a gaseous state. Machine, gas-liquid separator 1 can prevent liquid refrigerant from entering the compressor and cause compression and damage. The outer wall of gas-liquid separator 1 is covered with damping butyl rubber 9 to reduce the noise generated by liquid refrigerant entering the gas-liquid separator 1. The other end of the separator 1 is connected with a connecting pipe 11, the connecting pipe 11 and the capillary 5 are tightly wrapped with aluminum foil, and then a heat shrink sleeve is sleeved for heat shrinking, so that the capillary and the return pipe are closely attached together for cold and heat exchange, and the capillary is reduced. Refrigeration in 5 Temperature, improve the cooling efficiency.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, the embodiments are to be regarded as exemplary and non-limiting in every respect. The scope of the present invention is defined by the appended claims rather than the above description, and is therefore intended to fall within the scope of the rights. All changes within the meaning and scope of the required equivalent requirements are encompassed within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment includes only an independent technical solution. This description of the specification is for clarity only, and those skilled in the art should take the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

An efficient low-noise fin evaporator includes a gas-liquid separator (1), characterized in that an oil return hole (12) is provided at the lower end of the gas-liquid separator (1), and an upper end of the oil return hole (12) is connected There is a connecting pipe (11). The lower end of the oil return hole (12) is fixedly connected with an air return pipe (4) and a capillary tube (5). The outer surface of the air return pipe (4) and the capillary tube (5) is covered with an aluminum film and then passes through heat. The shrink tube (3) is tightly wrapped, and the upper end of the capillary tube (5) is provided with a gradual muffler tube (10), and the outer surface of the gradual muffler tube (10) is installed with a damping butyl rubber (9) and a damping butyl rubber (9) ) A rubber-plastic pipe (2) is fixedly installed on the outer surface. The rubber-plastic pipe (2) is wrapped from the capillary (5) and the gradual muffler (10) interface to the end of the fixed end plate of the evaporator, and the entire gradation is wrapped. The muffler pipe (10) and the connecting pipe (11), the other end of the rubber-plastic pipe (2) is fixedly connected to the evaporation pipe (7) internally, and aluminum fins (6) and aluminum fins are fixedly installed on the surface of the evaporation pipe (7). Fixed brackets are installed on the left and right sides of the sheet (6).
The high-efficiency and low-noise fin evaporator according to claim 1, characterized in that the upper and lower sides of the evaporation pipe (7) are fixedly connected with mounting brackets (8), and the number of the mounting brackets (8) is four.
The high-efficiency and low-noise fin evaporator according to claim 1, characterized in that the upper end of the connecting pipe (11) is located in the middle of the gas-liquid separator (1).
The high-efficiency and low-noise fin evaporator according to claim 1, wherein a surface of the evaporation pipe (7) is provided with a layer of hydrophobic coating.