CN201555495U - A carbon dioxide parallel flow heat recovery device header - Google Patents

Abstract

The utility model discloses a collector pipe of a carbon dioxide parallel flow type reheating device, which comprises a collector body, a collector end cover and a partition layer; the collector body is a square cavity, and the upper and lower ends of the cavity are provided with a collector The tube end cover, the cavity is divided into at least two cavities by at least one piece and the partition layer, and the header body is respectively provided with holes connected to the high temperature inlet pipe and the low temperature outlet pipe, or respectively provided with holes connected to the high temperature outlet pipe and the low temperature outlet pipe. A hole connected to the low-temperature inlet pipe; one side of the collector body is also provided with a plurality of micropores connecting the long microchannel pipe and the short microchannel pipe; the partition layer is provided with a plurality of holes for the long microchannel pipe to pass through. microporous. The utility model solves the problem of flow collection required for improving the supercooling and superheating of carbon dioxide by using the heat recovery device in the carbon dioxide refrigeration system. In order to develop a new type of carbon dioxide parallel flow recuperator with compact structure and high heat exchange efficiency, the required headers are provided.

Description

A carbon dioxide parallel flow heat recovery device header

technical field

The utility model relates to a collector for a parallel-flow heat recovery device, in particular to a collector for a parallel-flow heat recovery device in carbon dioxide transcritical cycle equipment used in refrigeration, air conditioning and heat pump cycles.

Background technique

In the refrigeration, air conditioning and heat pump cycle systems that use carbon dioxide as the working medium, heat recovery devices are usually used to improve the subcooling of carbon dioxide before entering the throttle valve and the overheating before entering the compressor, so as to achieve the purpose of protecting the safe operation of the compressor . In terms of structure, traditional regenerators mostly adopt casing or shell-and-tube type, while parallel-flow or tube-belt regenerators are mostly double-tube parallel type, which is large in size, not compact enough, and the production and processing technology is relatively complicated. It is difficult to realize and is only suitable for use in traditional refrigerant refrigeration systems.

Chinese invention patent 200510022122.1 discloses a combined manifold for an automobile air conditioner, which belongs to the technical field of manifolds for evaporators and condensers of automobile air conditioners. The technical problem to be solved in this patent is to provide a combined header in which a plurality of headers arranged horizontally are made on a header so as to pass multiple fluids at the same time. The collector includes a bottom plate with a rectangular groove in cross section, and a set of cover plates, the cover plate set includes more than two cover plates; the cover plate is composed of three sections, and the bent cover plates at both ends form a longitudinal section Flat and long rectangular groove, the width of the cover plate is equal to the width of the groove of the bottom plate; the cover plate is installed in the groove of the bottom plate to form more than two sections of collecting pipes arranged longitudinally and separated from each other; there are several sets of guide tube installation hole groups on the bottom plate , corresponding to the cover plate installed on the bottom plate; there are fluid inlet holes on the cover plate of the upper section, and fluid outlet holes on the cover plate of the lower section. The header is made of multiple headers in one header to realize the circulation of different fluids in the same header, so as to reduce the volume of the automobile air conditioner and reduce the cost, but the header is separated by a cover plate. The structure of more than two segments arranged longitudinally and separated from each other not only requires high machining accuracy, but also has poor flow blocking effect.

Utility model content

The purpose of the utility model is to overcome the above-mentioned shortcomings of the prior art, and provide a carbon dioxide parallel-flow regenerating device collector with low processing accuracy requirements and good flow separation effect.

The utility model is realized through the following technical solutions:

The manifold of the carbon dioxide parallel flow heat recovery device includes the manifold body, the manifold end cap and the partition layer; the manifold body is a square cavity, and the upper and lower ends of the cavity are provided with the manifold end caps , the cavity is divided into at least two cavities by at least one piece and the partition layer, and the header body is respectively provided with holes connected to the high-temperature inlet pipe and the low-temperature outlet pipe, or respectively provided with high-temperature outlet pipes and low-temperature inlet pipes connected holes; one side of the collector body is also provided with a plurality of micropores connecting the long microchannel tube and the short microchannel tube; the partition layer is provided with a plurality of micropores for the long microchannel tube to pass through.

The partition layer is one piece, and divides the cavity of the header body into two.

The connection between the header body and the end cover of the header, the connection between the high-temperature inlet pipe and the low-temperature outlet pipe and the header body, and the connection between the long microchannel tube and the short microchannel tube and the header body respectively, and the long microchannel The connection of the tube and the partition layer is welded by brazing.

The connection between the long microchannel tube and the short microchannel tube and the header body, and the connection between the long microchannel tube and the partition layer through expansion joints.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

(1) The collecting pipe described in the utility model solves the problem of collecting flow required by using a heat recovery device to improve the supercooling and superheating of carbon dioxide in the carbon dioxide refrigeration system.

(2) The manifold described in the utility model provides the required manifold for the development of a new carbon dioxide parallel flow recuperator with compact structure and high heat exchange efficiency.

(3) Compared with the double-pipe side-by-side collector used in the traditional parallel-flow or pipe-belt regenerator, the collector described in the utility model is more compact in structure size, and the production and processing technology is also simple, which is easy to realize .

Description of drawings

Fig. 1 is the structural schematic diagram of the manifold of the carbon dioxide parallel flow reheating device of the present invention;

Fig. 2 is the right side view of Fig. 1;

Fig. 3 is A-A sectional view among Fig. 1;

Fig. 4 is B-B sectional view among Fig. 2;

Fig. 5 is a structural schematic diagram of a carbon dioxide parallel-flow reheating device applying the manifold of the utility model.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and embodiments, but the protection scope of the utility model is not limited to the range described in the specific embodiments.

As shown in Figure 1-4, the manifold of the carbon dioxide parallel flow regenerating device includes the manifold body 5, the manifold end cover 6 and the partition layer 3; the manifold body 5 is a square cavity, and the cavity The upper and lower ends are provided with header end caps 6, and the cavity is divided into at least two cavities by at least one block and the partition layer 3. The header body 5 is respectively provided with holes connected to the high-temperature inlet pipe 1 and the low-temperature outlet pipe 2. , or are respectively provided with holes connected with the high-temperature outlet pipe 7 and the low-temperature inlet pipe 8. One side of the header body 5 is also provided with a plurality of micropores connecting the long microchannel tube 4 and the short microchannel tube 9; the partition layer 3 is provided with a plurality of micropores for the long microchannel tube 4 to pass through. The connection between the manifold body 5 and the manifold end cap 6, the connection of the high-temperature inlet pipe 1 and the low-temperature outlet pipe 2 with the manifold body 5, and the connection between the long microchannel tube 4 and the short microchannel tube 9 and the manifold body 5, the connection between the long microchannel tube 4 and the partition layer 3 can be welded by brazing; the connection between the long microchannel tube 4 and the short microchannel tube 9 and the header body 5, the long microchannel tube 4 and the partition layer 3 The connections can also be connected by expansion joints.

As shown in Figure 5, the carbon dioxide parallel flow reheating device includes a high-temperature inlet pipe 1, a low-temperature outlet pipe 2, a partition layer 3, a long microchannel pipe 4, a header body 5, a header end cover 6, and a header End cap 5, high temperature outlet tube 7, low temperature inlet tube 8 and short microchannel tube 9. There are two headers of the carbon dioxide parallel flow regenerating device, which are two pipeline cavities formed after the left header and the right header are separated by their respective partition layers 3, and the adjacent chambers are the left header and the right header. The pipe cavity on the inner side of the right collector; that is, the pipe cavity close to the windward side, and the far cavity is the pipe cavity on the outside of the left and right collectors, that is, the pipe cavity away from the windward side.

Holes for installing the long microchannel tube 4 and the short microchannel tube 9 are opened on the header body 5 and the partition layer 3 . The left end of long micro-channel pipe 4 passes the opening on the collector body 5 on the left collector and the partition layer 3, and stretches into the cavity pipeline made up of the collector body 5 and the partition layer 3, and the long The right end of the microchannel pipe 4 passes through the opening on the collecting pipe body 5 and the partition layer 3 on the right collecting pipe, and stretches into the cavity pipeline formed by the collecting pipe body 5 and the partition layer 3, and the length is slightly The channel pipe 4 and the header body 5 are brazed with the partition layer 3 . The left end of the short microchannel pipe 9 passes through the opening on the manifold body 5 on the left manifold 1, and stretches into the cavity pipeline formed by the manifold body 5 and the partition layer 3, and the short microchannel pipe The right end of 9 then passes through the opening on the manifold body 5 on the right manifold, and stretches into the cavity pipeline formed by the manifold body 5 and the partition layer 3, the short microchannel pipe 9 and the manifold The body 5 is brazed. The high-temperature and high-pressure carbon dioxide working medium enters from the high-temperature inlet pipe 1, diverts through the left header, and then enters the long microchannel pipes 4 arranged in parallel and alternately, converging to the right header, and then welded with the right header The high-temperature outlet pipe 6 flows out, thereby forming a flow pipeline of high-temperature and high-pressure carbon dioxide working fluid, ensuring that the regenerating device has a stable heat source for heating the low-temperature and low-pressure carbon dioxide working fluid. The low-temperature and low-pressure carbon dioxide working medium enters from the low-temperature inlet pipe 7, diverts through the right header, enters the long micro-channel pipes 9 arranged in parallel and alternately, converges to the left header, and is welded with the left header. The low-temperature outlet pipe 7 flows out, thereby forming a flow pipeline for the low-temperature and low-pressure carbon dioxide working medium, ensuring that the regenerating device heats the low-temperature and low-pressure carbon dioxide working medium.

However, the casing or shell-and-tube type is often used in traditional heat recovery devices, which will cause uneven distribution of flow, resulting in uneven heat conduction of the working fluid, and incomplete heat exchange. The double-tube parallel header used in the parallel flow or tube-belt regenerator is difficult to be used in the refrigeration system of carbon dioxide because of its large structural size, not compact enough, difficult to produce and process, and can only be used in Traditional refrigerant refrigeration system. The collector pipe of the invention realizes the effects of flow collection and flow diversion in the carbon dioxide parallel flow heat recovery device.

Claims (4)

1. The header of the carbon dioxide parallel flow reheating device, including the header body, the header end cover and the partition layer; it is characterized in that the header body is a square cavity, and the upper and lower ends of the cavity are arranged There is a collector end cover, and the cavity is divided into at least two cavities by at least one piece and the partition layer. The header body is respectively provided with holes connected to the high-temperature inlet pipe and the low-temperature outlet pipe, or respectively provided with holes connected to the high-temperature outlet pipe. The hole connecting the outlet pipe and the low-temperature inlet pipe; one side of the collector body is also provided with a plurality of micropores connecting the long microchannel pipe and the short microchannel pipe; through micropores. 2. The header of a carbon dioxide parallel flow heat recovery device according to claim 1, characterized in that: the partition layer is one piece, and divides the cavity of the header body into two. 3. The manifold of carbon dioxide parallel flow regenerating device according to claim 1, characterized in that: the connection of the manifold body and the end cap of the manifold, the connection between the high-temperature inlet pipe and the low-temperature outlet pipe and the manifold body The connection, and the connection between the long microchannel tube and the short microchannel tube and the header body respectively, and the connection between the long microchannel tube and the partition layer are welded by brazing. 4. The carbon dioxide parallel flow type heat recovery device header according to claim 1, characterized in that: the connection between the long microchannel tube and the short microchannel tube and the header body, the long microchannel tube and the partition layer through the expansion connection.

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