WO2020057376A1

WO2020057376A1 - Foam sheet and finless foam sheet heat exchanger

Info

Publication number: WO2020057376A1
Application number: PCT/CN2019/104483
Authority: WO
Inventors: 陈创军; 龙超华
Original assignee: 陈创军
Priority date: 2018-09-18
Filing date: 2019-09-05
Publication date: 2020-03-26
Also published as: CN109282677A

Abstract

Provided by the present invention is a foam sheet, comprising a sheet, a liquid storage gas chamber provided on the sheet, a refrigerant channel and foam points. The liquid storage gas chamber, the refrigerant channel and the foam points are all internally provided with cavities, the refrigerant channel communicates with the liquid storage gas chamber, and the foam points are provided on the refrigerant channel and communicate with the refrigerant channel. The foam sheet of the present invention has a simple fabrication process and low fabrication costs. Also provided by the present invention is a foam sheet heat exchanger, comprising a plurality of foam sheet groups arranged in a stack, each foam sheet group comprising two foam sheets, wherein the shapes of the liquid storage gas chambers and the refrigerant channels of one of the foam sheets and the other foam sheet are mirror-symmetrical; the liquid storage gas chambers and the refrigerant channels of the two foam sheets are overlap relative to each other to form a completely closed channel for refrigerant to flow. The foam sheet heat exchanger of the present invention has a simple fabrication process and low fabrication costs; the ventilation capacity of the product is increased while air resistance is reduced, thus increasing the heat exchange area; the condensed water is easily removed, greatly reducing the phenomenon of frost and ice blockage, and increasing the heat transfer performance of the heat exchanger.

Description

Bubble sheet and finless bubble sheet heat exchanger

Technical field

The invention relates to a bubble fin and a finless bubble fin heat exchanger, and belongs to the technical field of heat exchange.

Background technique

A heat exchanger is a device that realizes heat transfer between fluids, also known as a heat exchanger. At present, known heat exchangers include a plate type, a tube type, a tube sheet type, a tube belt type, a laminated type, a parallel flow and the like. Heat exchangers play an important role in chemical, petroleum, power, food, refrigeration and air conditioning, and many other industrial productions, and are widely used. Most traditional heat exchangers need to add fins (not effective direct heat exchange walls) for heat exchange inside and outside the flow channel. For example, in the tube-fin heat exchanger structure, the aluminum copper fins and the aluminum fins are brought into contact with each other by means of mechanical expansion of the aluminum heat exchange fins and round copper tubes. The heat exchange efficiency is insufficient. Ideal, the product is large and heavy, and after a period of use, due to mechanical tube expansion defects, the contact thermal resistance of the fins and the copper tube will double, but the heat transfer capacity will be significantly reduced; on the other hand, with the recent years, The rising price of copper has made the cost of heat exchangers high. At the same time, the circular copper tubes of traditional tube-fin heat exchangers have large hydraulic diameters and are not suitable for the promotion of new refrigerants. Type, parallel flow and other structure heat exchangers, all of its structure is to add dense fins outside the tube wall to increase heat exchange capacity, its defects are as follows: (1) due to the dense fins, the product wind resistance is large , Must not be solved by increasing the fan power, power consumption. (2) The fins are dense, it is easy to accumulate dust, it is difficult to clean, and it affects the heat exchange capacity. It cannot be widely used in various harsh working environment equipment. (3) Due to the existence of fins, it is difficult to discharge the condensed water, which is easy to frost and affect the heat transfer performance, especially it is difficult to apply in the new type of new energy electric heat pump refrigeration and air-conditioning system; (4) product structure It is complicated, has many processing technologies and high manufacturing costs.

Summary of the Invention

Based on the above shortcomings, the technical problem to be solved on the one hand of the present invention is to provide a blister sheet, which has a simple manufacturing process and low manufacturing cost.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

A bubble sheet includes a sheet, a liquid storage gas chamber, a refrigerant channel, and a bubble point provided on the sheet. The refrigerant channel is groove-shaped, and the refrigerant channel is in communication with the liquid storage gas chamber. The bubble point is disposed on the refrigerant channel and communicates with the refrigerant channel.

The liquid storage gas chamber is provided with a plurality of refrigerants, and the refrigerant in the refrigerant channel is collected in the liquid storage gas chamber. The bubble point is provided on the surface of the refrigerant channel to form a space layer through which a fluid passes.

The refrigerant channel has a linear shape structure.

The liquid storage gas chamber may be provided as a blind hole or a through hole, or any combination of the through hole and the blind hole.

The blister sheet is thin-walled by stamping or 3D printing.

With the above technical solutions, the present invention has achieved the following technical effects:

The blister sheet provided by the invention is provided with a liquid storage gas chamber, a refrigerant channel and a bubble point, and can be obtained by an integral molding method such as stamping or 3D printing, and has a simple manufacturing process and low manufacturing cost.

Another technical problem to be solved by the present invention is to provide a finless bubble fin heat exchanger, which has a simple manufacturing process and low manufacturing cost; the product has increased ventilation capacity and reduced wind resistance, which increases the heat exchange area; and condensed water is easily removed , Greatly reduce the phenomenon of frost and ice blocking, and increase the heat transfer performance of the heat exchanger.

A bubble sheet heat exchanger comprises a plurality of bubble sheet groups arranged in a stack, the bubble sheet group is composed of two of the bubble sheets; the liquid storage gas chamber and the refrigerant channel of the two bubble sheets form a completely closed supply. Refrigerant flow channel.

A groove is formed between the refrigerant channels for the condensed water to flow out.

The finless fin-type heat exchanger provided by the present invention is formed by overlapping a plurality of groups of the fin groups, and each group of the fin groups is formed by a combination of two pieces of the fins to form a complete refrigerant channel, and the bubbles The sheet can be quickly formed by stamping, the manufacturing process is simple, and the manufacturing cost is low; and it has a finless structure, which increases the product's ventilation capacity and reduces the wind resistance, which increases the heat exchange area; Condensate is easily removed, greatly reducing frost and ice blocking, and increasing heat transfer performance of the heat exchanger.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a structural diagram of a blister sheet according to the present invention;

2 is a front view of a blister sheet according to the present invention;

Figure 3 is a side view of the blister sheet of the present invention;

FIG. 4 is a structural diagram of a bubble sheet heat exchanger according to the present invention.

detailed description

As shown in FIG. 1 to FIG. 3, the present invention provides a blister sheet 10 including a sheet material 101, a liquid storage gas chamber 102, a refrigerant passage 103, and a bubble point 104 provided on the sheet material 101. The chamber 102 and the refrigerant passage 103 are both groove-shaped. The refrigerant passage 103 is in communication with the liquid storage gas chamber 102. The bubble point 104 is disposed on the refrigerant passage 103 and communicates with the refrigerant passage 103.

Specifically, the liquid storage gas chamber 102 is configured to collect and contain the refrigerant. The liquid storage gas chambers 102 may be provided in two as shown in the figure of the embodiment, and are respectively disposed at two ends of the refrigerant passage 103. In other specific embodiments, one or more liquid storage gas chambers may be provided, and the liquid storage gas chambers may be located at any position on the refrigerant channel 103. The liquid storage gas chamber 102 can be a through hole or a blind hole. According to different heat exchange needs, the liquid storage gas chamber 102 can be arbitrarily combined with different numbers of through holes and blind holes to limit the refrigerant flow in the cavity to To achieve the best heat transfer effect. At least one refrigerant passage 103 is communicated with the liquid storage gas chamber 102, and the refrigerant in the refrigerant passage 103 is finally collected in the liquid storage gas chamber. In this embodiment, the refrigerant passage 103 is bent in a wavy shape. While increasing the flow resistance, the heat exchange area is increased, the residence time of the refrigerant is increased, and the refrigerant can fully exchange heat with the bubble sheet 10. Of course, the refrigerant passage 103 may be a straight line. A bubble point 104 is provided on the refrigerant channel 103, and the bubble points 104 are multiple, and are respectively disposed at the bending positions of the wave-shaped refrigerant channel 103. The bubble point 104 is convex and formed by the refrigerant channel 103 protruding outward. The setting of the bubble point 104 forms a space layer on the surface of the refrigerant channel 103. This space layer allows the fluid to pass through, further increasing the residence time of the refrigerant, and increasing the replacement time. Thermal area. The liquid storage air chamber 102, the refrigerant passage 103, and the bubble point 104 are all disposed on the same surface of the sheet 101 and communicate with each other. The blister sheet 10 is integrally formed in a thin wall shape, which can be obtained by pressing or 3D printing. The process is simple and the processing is convenient.

As shown in FIG. 4, the present invention also provides a bubble sheet heat exchanger, which includes a plurality of bubble sheet groups arranged in a stack, each bubble sheet group is composed of two bubble sheets 10; The liquid-gas chamber and the refrigerant channel form a completely closed channel for the refrigerant to flow. A groove is formed between the refrigerant channels for the condensed water to flow out, and the condensed water can be easily discharged without causing frosting or affecting the heat exchange performance. It can be applied to a new type of new energy electric heat pump refrigeration and air conditioning system.

The finned heat exchanger provided by the present invention is formed by overlapping multiple sets of fins. Each set of fins includes two fins opposite to each other, and the liquid storage gas chamber and the refrigerant channel of the two fins form a closed and complete storage. Liquid-gas chamber and refrigerant channel. Each blister can be integrally formed, the manufacturing process is simple, materials are saved, the manufacturing cost is low, parts are simplified, and assembly is more convenient; and it has a finless structure, which increases the ventilation capacity of the product, reduces wind resistance, and increases the heat exchange area; refrigerant Grooves are formed between the channels. Condensate is easily removed, which greatly reduces the phenomenon of frost and ice blocking, and increases the heat exchange performance of the heat exchanger. This makes the patented products widely used, especially in refrigeration, heat pump air-conditioning, and refrigeration. .

Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it will still be possible for those skilled in the art to interpret the foregoing. The technical solutions described in the embodiments are modified, or some technical features are equivalently replaced. However, any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the present invention. Within the scope of protection.

Claims

A bubble sheet is characterized by comprising a sheet material, a liquid storage gas chamber, a refrigerant channel and a bubble point provided on the sheet material, the refrigerant channel is groove-shaped, the refrigerant channel and the liquid storage The air chamber is connected, and the bubble point is disposed on the refrigerant passage and communicates with the refrigerant passage.
The bubble sheet according to claim 1, wherein the liquid storage gas chamber is provided with a plurality of refrigerants, the refrigerant in the refrigerant passage is collected in the liquid storage gas chamber, and the bubble point is provided in the refrigerant The surface of the channel forms a space layer through which the fluid passes.
The blister sheet according to claim 1 or 2, wherein the refrigerant channel has a linear shape structure.
The blister sheet according to claim 1, wherein the liquid storage gas chamber can be provided as a blind hole or a through hole, or any combination of the through hole and the blind hole.
The blister sheet according to claim 1, wherein the blister sheet is thin-walled by stamping or 3D printing.
A finless bubble sheet heat exchanger is characterized by comprising a plurality of bubble sheet groups arranged in a stack, the bubble sheet group consisting of two of the bubble sheets, a liquid storage gas chamber of the two bubble sheets, and The refrigerant channel forms a completely closed channel for refrigerant flow.
The bubble sheet heat exchanger according to claim 6, wherein a groove is formed between the refrigerant channels for the condensed water to flow out.