CN215638141U - Grid type evaporator - Google Patents

Abstract

The utility model relates to a refrigeration technology, in particular to a grid evaporator, which comprises a refrigerant pipe, wherein the wall thickness of the refrigerant pipe is uniform, and the inner pipe wall of the refrigerant pipe is provided with a concave part and a convex part; the outer pipe wall of the refrigerant pipe is provided with a convex part and a concave part corresponding to the inner pipe wall; the outer wall of the refrigerant pipe is provided, the grid sheet inclines upwards and is provided with a stripe hole, and the root of the grid sheet is arranged at the sunken part of the outer pipe wall. Compared with the common evaporator with a circular refrigerant pipe, the evaporator has the advantages that the contact area between the refrigerant with the same volume and the inner wall of the pipe is larger, and the heat exchange is faster under the condition of the same temperature difference. Because the heat exchange area is increased, the heat absorption of the refrigerant is faster, and the liquid drops can enter the convex part after passing through the concave part, the air pressure is reduced due to the increase of the space, and the liquid evaporation is facilitated. Meanwhile, large liquid drops are kept at a lower position, the escape of the liquid drops is reduced, the height of a refrigerant pipe can be reduced under the condition of ensuring evaporation, and the space occupation and the material consumption are reduced.

Description

Grid type evaporator

Technical Field

The utility model relates to the technology of refrigeration equipment, in particular to a grid type evaporator.

Background

The compressor, the condenser, the expansion valve (restrictor) and the evaporator are main components of the refrigeration equipment, wherein the evaporator is used for outputting cold energy, and the refrigerant absorbs heat of a cooled object or space through the evaporator to achieve the refrigeration purpose. The evaporator design mainly considers how the inside enables the refrigerant to be normally decompressed and evaporated to absorb heat, how the outside can better perform heat exchange, and comprehensively considers the space restriction and the manufacturing cost.

The general heat exchange process of the evaporator is as follows: after entering the evaporator from the expansion valve, the refrigerant absorbs heat after being subjected to pressure reduction and volume expansion, and the refrigerant firstly absorbs heat from the inner wall of the metal pipe without considering less air inside the evaporator, which is the first heat exchange, and the heat transfer mode is mainly the conduction heat transfer between liquid (refrigerant) and solid (inner wall of the pipe) and the convection heat transfer between a small part of air and solid. And then the outer wall of the metal pipe and the outside perform secondary heat exchange to absorb external heat.

The existing evaporator has various structural forms, and the refrigerant widely used flows in a circular tube, the circular tube is made into a shape adapting to the space, and the heat dissipation components such as fins are arranged outside the circular tube. In the common structural form, the use of the round pipe can use the minimum material under the condition of containing the same refrigerant, and the arrangement of the fin can increase the heat exchange area, but neglects the following problems:

while round tubes do allow for the use of the least amount of material to accommodate the same refrigerant, the addition of fins for heat dissipation increases the use of material. In addition, the application of the round tube enables the contact area of the refrigerant with the same volume and the inner wall of the tube to be the minimum, the main influence factor of heat exchange is the infiltration area of the refrigerant and the tube wall in the tube, and the existing design mainly considers the heat dissipation of the outer part of the tube wall and is not beneficial to the improvement of the heat exchange efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a grid type evaporator, which improves the heat exchange performance of the evaporator on the premise of occupying approximately the same space size.

A grid evaporator comprises a refrigerant tube, the wall thickness of the refrigerant tube is uniform, the inner tube wall of the refrigerant tube is provided with a concave part and a convex part; the outer pipe wall of the refrigerant pipe is provided with a convex part and a concave part corresponding to the inner pipe wall; the outer wall of the refrigerant pipe is provided, the grid sheet inclines upwards and is provided with a stripe hole, and the root of the grid sheet is arranged at the sunken part of the outer pipe wall.

In a further improvement, the bulge part of the outer pipe wall of the refrigerant pipe is an arc-shaped bulge. The part of the grid plate, which is connected with the refrigerant pipe, is arranged below the raised part of the outer wall of the refrigerant pipe, and the grid plate is a position for locally enlarging the inner space of the refrigerant pipe, so that the heat exchange of the refrigerant is facilitated.

The refrigerant pipes are straight pipes, the number of the refrigerant pipes is not less than two, the refrigerant pipes are arranged in parallel, and the refrigerant pipes are vertically arranged to be beneficial to the flow of the refrigerant in the pipes.

In a further improvement, the refrigerant pipe is a copper pipe or a stainless steel pipe, and is selected according to the type of the refrigerant.

In a further improvement, a flow divider is arranged between the liquid inlet pipe and the expansion valve of the refrigerant pipe, so that the flow of the refrigerant in each refrigerating pipe is as uniform as possible.

In a further improvement, the grid is an arc-shaped plate, which is beneficial to the flow of external air flow.

Compared with the prior art, the utility model has the beneficial effects that:

(1) compared with a common circular refrigerant pipe, the refrigerant pipe adopted by the evaporator has more contact area between the refrigerant with the same volume and the inner wall of the pipe, and the heat exchange is quicker under the condition of the same temperature difference.

(2) The evaporator has the advantages that the heat exchange area is increased, the heat absorption of the refrigerant is faster, liquid drops can enter the convex part after passing through the concave part, the space is increased, the air pressure is reduced, and the evaporation of the liquid is facilitated. Meanwhile, large liquid drops are kept at a lower position, the escape of the liquid drops is reduced, the height of a refrigerant pipe can be reduced under the condition of ensuring evaporation, and the space occupation and the material consumption are reduced.

(3) The part where the grid sheet is connected with the refrigerant pipe is the position where the internal space of the refrigerant pipe is locally enlarged, namely the part which absorbs more heat, and the internal and external temperature difference is large, thereby being more beneficial to the heat exchange of the refrigerant.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application, and in which:

FIG. 1 is a perspective view of a single refrigerant tube structure of a grid evaporator provided by the present invention;

FIG. 2 is a front view of a single refrigerant tube structure of a grid evaporator provided in accordance with the present invention;

FIG. 3 is a top view of a single refrigerant tube structure of a grid evaporator provided in accordance with the present invention;

fig. 4 is a schematic view of an assembly structure of a plurality of refrigerant tubes of the grid evaporator provided by the utility model.

In the figure, the position of the upper end of the main shaft,

1. a refrigerant pipe; 11. a boss portion; 12. a recessed portion; 13. a liquid inlet; 14. an outlet port; 15. a liquid inlet pipe; 2. a grid sheet; 3. a transverse plate; 4. a flow divider.

Detailed Description

Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

Fig. 1-3 show a schematic of a single refrigerant tube configuration for a grid evaporator. The refrigerant pipe 1 comprises a refrigerant pipe, the external shape of the refrigerant pipe is like a candied haw, the pipe wall is uniform, and the inner pipe wall is provided with a concave part and a convex part. The outer tube wall of the refrigerant tube has a protrusion 11 and a depression 12, a liquid inlet 13 at the lower end and a discharge outlet 14 at the upper end, corresponding to the inner tube wall, when viewed from the outside.

Compared with the common circular refrigerant pipe, the refrigerant pipe with the shape has more contact area between the refrigerant with the same volume and the inner wall of the pipe, and the heat exchange is quicker under the condition of the same temperature difference.

In order to completely change the refrigerant to a gaseous state, the refrigerant tube needs to be long enough or the space inside the tube needs to be large enough, and heat absorption needs to be performed as much as possible. With the provision of the depression 12, three effects are produced:

on one hand, the heat exchange area is increased, and the refrigerant absorbs heat more quickly.

On the other hand, the presence of the depression causes differentiation of the droplet there. The depressions increase the velocity of the liquid at the locations, while the gas has a tendency to increase over a small range, which increases the velocity of the liquid droplets to flow upwards, while the increase in gas pressure causes the droplets to form more droplets, so that the heavier droplets are slowed down relatively and the lighter droplets are more likely to enter the next projection.

Thirdly, the liquid drops can enter the convex part after passing through the concave part, the space is increased, the air pressure is reduced, and the liquid is beneficial to the gasification of the liquid.

Through the three effects, the heat absorption is faster and the evaporation of the liquid drops is accelerated, meanwhile, the large liquid drops are kept at the lower positions, the escape of the liquid drops is reduced, the height of the refrigerant pipe can be reduced under the condition of ensuring the evaporation, and the space occupation and the material consumption are reduced.

To increase heat exchange, the refrigerant tubes are provided with fins 2. Grid 2 is arc platelike and is tangent with bellying 11, and tangent position is in the downside of bellying 11, and the lower part of grid 2 sets up the snap ring and cup joints in the depressed part, and for the convenience of installation, the snap ring sets up to the components of a whole that can function independently structure, fastens with the bolt.

The part of the grid 2 connected with the refrigerant pipe is the position of local enlargement of the internal space of the refrigerant pipe, namely the part with more heat absorption, the internal and external temperature difference is large, and the grid 2 is arranged at the position to be more beneficial to the heat exchange of the refrigerant.

The angle of the grid pieces 2 is inclined upwards, when the air in the external space forms convection or circulation, the contact between the grid pieces and the air is facilitated, and the strip-shaped holes arranged on the grid pieces are beneficial to the circulation of the air between the grid pieces.

Fig. 4 shows the evaporator with a plurality of refrigerant tubes assembled, shown as an assembly of 7 refrigerant tubes. The refrigerant pipe is vertical setting, and 7 refrigerant pipes connect in parallel and form one row, and both ends are fixed by diaphragm 3. The liquid inlet 13 of the refrigerant pipe is connected with a liquid inlet pipe 15, the liquid inlet pipe 15 is connected with a flow divider 4, and the flow divider 4 is connected with an expansion valve. The discharge port 14 is connected to a discharge pipe 16, and the refrigerant in the discharge pipe 16 flows into the compressor and then the next cycle is started.

In the present embodiment, the refrigerant tube and the combined structure of the refrigerant tube and the grid can be applied to various dry evaporators and further applied to various refrigeration apparatuses. The heat exchange efficiency of the evaporator can be improved without increasing the occupied space.

The grid condenser provided in the example is mainly suitable for the construction of a refrigeration house, can be arranged close to a wall body, can also be built on a goods shelf, and is favorable for improving the refrigeration effect of equipment.

It is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.

While the foregoing description shows and describes several preferred embodiments of the utility model, it is to be understood, as noted above, that the utility model is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (8)

1. A grid evaporator comprising refrigerant tubes, characterized in that,

the tube wall thickness of the refrigerant tube is uniform, and the inner tube wall of the refrigerant tube is provided with a concave part and a convex part; the outer pipe wall of the refrigerant pipe is provided with a convex part and a concave part corresponding to the inner pipe wall;

the outer wall of the refrigerant pipe is provided with a grid sheet, the grid sheet inclines upwards and is provided with a stripe hole, and the root of the grid sheet is arranged at the sunken part of the outer pipe wall.

2. A grid evaporator according to claim 1, wherein the outer tube wall projection of the refrigerant tube is an arc-shaped projection.

3. A grid evaporator according to claim 2, wherein said grid is tangent to the underside of the raised portion of the outer wall of the refrigerant tube.

4. A grid evaporator according to claim 1 wherein the refrigerant tubes are straight tubes, the number of refrigerant tubes is not less than two, and the refrigerant tubes are arranged in parallel.

5. A grid evaporator according to claim 4, wherein the refrigerant tubes are arranged vertically.

6. A grid evaporator according to claim 5, wherein the refrigerant tubes are copper tubes or stainless steel tubes.

7. A grid evaporator according to any one of claims 1 to 6, wherein a flow divider is provided between the refrigerant line feed and the expansion valve.

8. A grate evaporator as claimed in any one of claims 1 to 6, characterized in that the grate is an arc-shaped plate.

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