A kind of oil full circulation heat collecting plate

Abstract

The present invention discloses an oil-liquid full-circulation heat collecting plate. The overall structure of the working medium flow channel in the heat collecting plate body adopts a top-in and bottom-out mode. After the working medium enters the heat collecting plate body, it is drained to the upper part of the heat collecting plate body, and then is evenly dispersed to the flow channel on the upper part of the plate body through diversion, and then flows through the plate body through the middle flow channel, absorbs heat, and undergoes a phase change to become a gaseous working medium. The gaseous working medium descends under the action of suction and gravity at the heat collecting plate outlet to absorb heat and finally returns to the working medium outlet. The working medium flow path is unobstructed, which is convenient for oil return and reduces system power consumption. The working medium enters from the upper part of the plate body and is evenly dispersed to the entire plate surface under the action of suction and gravity at the heat collecting plate outlet. The liquid separation is more uniform, there is no dead angle, the working medium diffusion space is larger, the heat absorption is more sufficient, the amount of heat absorbed is more, and the heat absorption efficiency of the heat collecting plate is improved.

Description

Technical Field

[0001] The invention belongs to new energy technology and relates to an oil full-circulation heat collecting plate. Background Art

[0002] The heat collecting plate arranges oil flow channels in the plate surface, and the working medium in the flow channels undergoes phase change and absorbs heat energy from the environment to achieve the purpose of heat exchange. In the existing heat collecting plate arrangement structure, the flow channels are usually arranged in a way that the oil enters from the bottom and exits from the top. The flow channels are evenly distributed on the heat collecting plate. After long-term use, it is found that the existing heat collecting plate structure has the following defects:

[0003] 1. The flow channel layout adopts the oil in-bottom and out-top method. There are dead corners at the bottom or edge of the heat collecting plate. Residual oil often stays in the heat collecting plate for a long time and cannot flow, resulting in the inability of the oil to circulate completely, affecting the heat exchange efficiency of the heat exchange system. When a large amount of residual oil stays, the system will be short of oil, and the sudden change in pressure will cause the flow channel to rupture, seriously affecting the reliability of the system.

[0004] 2. The oil cannot circulate completely in the heat collecting plate, and the plate surface cannot be maximized for heat absorption, which reduces the heat absorption of the heat collecting plate, reduces the energy efficiency ratio of the heat collecting plate, and has a poor heating effect. The system energy consumption increases, consumes the compressor power, and causes the system COP to decrease. Summary of the invention

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide an oil-liquid full-circulation heat collecting plate, which increases the heat absorption capacity of the heat collecting plate, reduces the power consumption of the compressor, and thus improves the energy efficiency ratio.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] An oil full-circulation heat collecting plate comprises a heat collecting plate body, wherein a working medium flow channel arranged in the heat collecting plate body comprises an upper flow averaging area, a middle flow channel and a lower flow averaging area in order from top to bottom;

[0008] The working medium inlet arranged at the edge of the heat collecting plate body is connected with the upper equal flow area, and the working medium outlet arranged near the bottom of the heat collecting plate body is connected with the lower equal flow area. The liquid working medium enters the working medium inlet and enters the middle flow channel after being evenly distributed in the upper equal flow area, and is evenly dispersed to the entire panel of the heat collecting plate body. After absorbing heat, a phase change occurs and the liquid working medium converges to the lower equal flow area and is discharged from the bottom working medium outlet.

[0009] Furthermore, the heat collecting plate body is a vertical plate arrangement structure, the working fluid inlet and the working fluid outlet are both arranged at the bottom edge of the heat collecting plate body, and a shunt pipe is arranged on one side of the plate surface of the heat collecting plate body near the working fluid inlet. One end of the shunt pipe is connected to the working fluid inlet, and the other end is connected to the upper equal flow area through a plurality of working fluid flow channels distributed on one side of the heat collecting plate body. The upper equal flow area is located near the upper end of the heat collecting plate body.

[0010] Furthermore, the diverter pipe is an incremental pipe network. After the diverter pipe inlet is connected to the working medium inlet, it is divided into two diverter pipes, and then divided into 3, 4 or more diverter pipes layer by layer, and then connected to the upper equal flow area through several working medium flow channels.

[0011] Furthermore, the upper flow-averaging zone is composed of a plurality of rows of circular or block-shaped partitions arranged in the middle of a sheet-like connected area, and each row of partitions is staggered in a vertical direction to form a plurality of cross-arranged flow channels, and each inlet pipe of the upper flow-averaging zone is directly opposite to the position of the partition block nearby, and each outlet pipe of the upper flow-averaging zone is directly opposite to the position of the partition block nearby.

[0012] Furthermore, the middle flow channel is composed of multiple flow channel pipelines arranged vertically and in parallel. The flow channel pipelines are arranged at equal intervals and cover the middle area of ​​the heat collecting plate body. The oil dispersed from the upper flow area flows evenly and smoothly through the multiple flow channel pipelines without dead corners or oil residual areas.

[0013] Furthermore, the lower flow-averaging zone adopts a grid-shaped pipeline, and the working medium outlet located at the bottom of the heat collecting plate body is arranged on one side of the grid-shaped pipeline.

[0014] Furthermore, the lowest transverse branch of the grid-shaped pipeline in the lower flow-averaging area is slightly inclined toward the working medium outlet side located at the bottom of the heat collecting plate body.

[0015] Furthermore, the heat collecting plate body is a horizontal layout structure, the working fluid inlet and the working fluid outlet are both arranged on one side of the heat collecting plate body, the working fluid outlet is arranged near the bottom edge, and a diverter pipe is arranged on one side of the plate surface of the heat collecting plate body, one end of the diverter pipe is connected to the working fluid inlet, and the other end is connected to the middle flow channel.

[0016] Furthermore, the middle flow channel is composed of a plurality of S-shaped flow channel pipelines arranged in parallel, and the pipelines are arranged in an S shape at equal intervals and cover the entire middle area of ​​the heat collecting plate body.

[0017] The present invention has the following beneficial effects:

[0018] The overall structure of the working medium flow channel in the heat collecting plate body of the present invention adopts the top-in and bottom-out method. After the working medium enters the heat collecting plate body, it is guided to the upper part of the heat collecting plate body, and then evenly dispersed to the upper flow channel of the plate body through the diversion, and then flows through the plate body through the middle flow channel to absorb heat and undergo a phase change to become a gaseous working medium. The gaseous working medium descends under the action of the suction and gravity at the heat collecting plate outlet to absorb heat and finally returns to the working medium outlet. The working medium flow path is unobstructed, which is convenient for oil return, reduces system power consumption, and improves system COP. The working medium enters from the upper part of the plate body and is evenly dispersed to the entire plate surface under the action of the suction and gravity at the heat collecting plate outlet. The liquid separation is more uniform, there is no dead corner, the working medium diffusion space is larger, the heat absorption is more sufficient, the heat absorption is more, there is no problem of long-term oil retention, and the liquid separation is more uniform. Under the working condition where the pressure drop of the heat collecting plate remains unchanged or even reduced, the heat absorption efficiency of the heat collecting plate is improved, the power consumption of the compressor is reduced, and the energy efficiency ratio is improved.

[0019] The working fluid enters the plate body from the upper part and must flow through the middle flow channel to absorb heat before entering the lower working fluid outlet. This avoids the problem that the working fluid enters the working fluid outlet directly without absorbing heat, resulting in a heat absorption blind area in the heat collection plate and the plate surface cannot be maximized for heat absorption. In addition, after entering the plate body, the working fluid flows from top to bottom, avoiding the problem of the working fluid staying in some dead corners for a long time without flowing.

[0020] Furthermore, the lowest transverse branch of the grid-shaped pipeline in the lower flow-averaging area is slightly inclined toward the working medium outlet at the bottom of the heat collecting plate body to facilitate oil return. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 is a schematic structural diagram of Embodiment 2 of the present invention;

[0023] In the figure: 1-working fluid inlet, 2-dividing pipe, 3-lower equalizing flow area, 4-middle flow channel, 5-upper equalizing flow area, 6-working fluid outlet. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below with reference to specific embodiments, but is not intended to limit the present invention.

[0025] The oil-liquid full-circulation heat collecting plate of the present invention comprises a heat collecting plate body, in which a working medium flow channel is arranged, and the working medium flow channel arranged in the heat collecting plate body comprises an upper equal flow area 5, a middle flow channel 4 and a lower equal flow area 3 from top to bottom, a working medium inlet 1 arranged at the edge of the heat collecting plate body is connected with the upper equal flow area 5, and a working medium outlet 6 arranged near the bottom of the heat collecting plate body is connected with the lower equal flow area 3. The liquid working medium enters the working medium inlet 1 and is evenly divided by the upper equal flow area 5 before entering the middle flow channel 4, and is evenly dispersed to the entire panel of the heat collecting plate body. After absorbing heat, a phase change occurs and the liquid working medium is converted into a vapor working medium, and then the liquid working medium converges to the lower equal flow area 3, and finally reaches the bottom working medium outlet 6 for discharge.

[0026] like Figure 1 As shown, embodiment 1 is a vertical heat collecting plate, the working fluid inlet 1 and the working fluid outlet 6 are both arranged at the bottom edge of the heat collecting plate body, a shunt pipe 2 is arranged on one side of the heat collecting plate body near the working fluid inlet 1, one end of the shunt pipe 2 is connected with the working fluid inlet 1, and the other end is connected with the upper equal flow area 5 through a plurality of working fluid flow channels distributed on one side of the heat collecting plate body, the upper equal flow area 5 is located near the upper end of the heat collecting plate body, the liquid working fluid entering from the working fluid inlet 1 is shunted by the shunt pipe 2 and introduced into the upper equal flow area 5 on the upper part of the heat collecting plate body, and then shunted again by the upper equal flow area 5 and evenly enters the middle flow channel 4 and is dispersed to the entire panel of the heat collecting plate body, the vapor working fluid that undergoes phase change after absorbing heat finally converges to the lower equal flow area 3 distributed near the bottom end of the heat collecting plate body, and finally reaches the bottom working fluid outlet 6 for discharge.

[0027] The diverter pipe 2 is an incremental pipe network. After the inlet pipe of the diverter pipe 2 is connected with the working medium inlet 1, it is divided into two branch pipes, and then divided into 3, 4 or more branch pipes layer by layer. After that, it is connected with the upper flow equalization area 5 through a number of working medium flow channels. The diverter pipe is incrementally divided layer by layer, so the working medium flows stably and the diversion is uniform.

[0028] The upper flow-averaging zone 5 is composed of a plurality of rows of circular or block-shaped dividing blocks arranged in the middle of a sheet-like connected area, and each row of dividing blocks is staggered in the vertical direction to form a plurality of cross-arranged flow channels, and the working fluid flow channel distributed at the entrance of the upper flow-averaging zone 5 is directly opposite to the position of the nearby dividing blocks, and the working fluid entering the upper flow-averaging zone 5 from the working fluid flow channel is blocked and diverted by the dividing blocks, and after entering the upper flow-averaging zone 5 from several working fluid flow channels, it is evenly diverted by multiple rows of staggered dividing blocks and then dispersed into the middle flow channel 4, and the pipeline inlet of the middle flow channel 4, i.e., the outlet pipeline of the upper flow-averaging zone 5, is directly opposite to the position of the nearby dividing blocks, and the working fluid left in the flow channel of the upper flow-averaging zone 5 is blocked and diverted by the dividing blocks before entering the middle flow channel 4, thereby ensuring that the oil pressure entering the middle flow channel 4 is balanced and the flow rate is consistent.

[0029] The middle flow channel 4 is composed of multiple flow channel pipelines arranged vertically and in parallel. The flow channel pipelines are arranged at equal intervals and cover the middle area of ​​the heat collecting plate body. The oil dispersed from the upper flow area 5 flows evenly and smoothly through the multiple flow channel pipelines without dead corners and oil residual areas.

[0030] The lower flow-averaging zone 3 adopts a grid-like pipeline, and the working fluid outlet 6 at the bottom of the heat collecting plate body is arranged on one side of the grid-like pipeline. The oil flowing down from the middle flow channel 4 is collected through the grid-like pipe and then discharged from the working fluid outlet 6. The lowest horizontal branch of the grid-like pipeline in the lower flow-averaging zone 3 is slightly inclined toward the working fluid outlet 6 at the bottom of the heat collecting plate body.

[0031] like Figure 2 As shown, Example 2 is a horizontal heat collecting plate, the working fluid inlet 1 and the working fluid outlet 6 are both arranged on one side of the heat collecting plate body, the working fluid outlet 6 is arranged near the bottom edge, and a diverter pipe 2 is arranged on one side of the plate surface of the heat collecting plate body, one end of the diverter pipe 2 is connected with the working fluid inlet 1, and the other end is connected with the middle flow channel 4. The liquid working fluid entering from the working fluid inlet 1 is diverted by the diverter pipe 2 and introduced into the middle flow channel 4 on the upper part of the heat collecting plate body, and is dispersed to the entire panel of the heat collecting plate body. The vapor working fluid that undergoes phase change after absorbing heat finally converges to the lower equal flow area 3, and finally reaches the bottom working fluid outlet 6 for discharge.

[0032] In this embodiment, the upper flow balancing area 5 is not provided, but the upper flow balancing area 5 may be provided as required to achieve a better flow balancing effect.

[0033] The middle flow channel 4 is composed of a plurality of S-shaped flow channel pipelines arranged in parallel, and each pipeline is arranged in an S-shape at equal intervals and covers the entire middle area of ​​the heat collecting plate body.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the specific implementation modes of the present invention can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims.

Claims

1. An oil full circulation heat collecting plate, characterized in that: It comprises a heat collecting plate body, wherein the working medium flow channel arranged in the heat collecting plate body comprises, from top to bottom, an upper flow averaging area (5), a middle flow channel (4) and a lower flow averaging area (3); A working medium inlet (1) arranged at the edge of the heat collecting plate body is connected to the upper flow equalization area (5), and a working medium outlet (6) arranged near the bottom of the heat collecting plate body is connected to the lower flow equalization area (3). Liquid working medium enters the working medium inlet (1) and is evenly distributed in the upper flow equalization area (5) before entering the middle flow channel (4), and is evenly distributed over the entire panel of the heat collecting plate body. After absorbing heat and undergoing phase change, it converges to the lower flow equalization area (3) and is discharged from the bottom working medium outlet (6); The heat collecting plate body is a vertical plate arrangement structure, the working fluid inlet (1) and the working fluid outlet (6) are both arranged at the bottom edge of the heat collecting plate body, a shunt pipe (2) is arranged on one side of the plate surface of the heat collecting plate body near the working fluid inlet (1), one end of the shunt pipe (2) is connected to the working fluid inlet (1), and the other end is connected to the upper flow balancing area (5) through a plurality of working fluid flow channels distributed on one side of the heat collecting plate body, and the upper flow balancing area (5) is located near the upper end of the heat collecting plate body.

2. The oil full circulation heat collecting plate according to claim 1, characterized in that: The flow dividing pipe (2) is an incremental pipe network. After the inlet pipe of the flow dividing pipe (2) is connected to the working medium inlet (1), it is divided into two branch pipes, and then divided into three, four or multiple branch pipes layer by layer, and then connected to the upper equal flow area (5) through a plurality of working medium flow channels.

3. The oil full circulation heat collecting plate according to claim 1 or 2, characterized in that: The upper flow balancing area (5) is composed of a plurality of rows of circular or block-shaped partitions arranged in the middle of a sheet-like connected area, and each row of partitions is staggered in a vertical direction to form a plurality of cross-arranged flow channels. Each inlet pipeline of the upper flow balancing area (5) is directly opposite to the position of the partition block near it, and each outlet pipeline of the upper flow balancing area (5) is directly opposite to the position of the partition block near it.

4. The oil full circulation heat collecting plate according to claim 3, characterized in that: The middle flow channel (4) is composed of a plurality of flow channel pipelines arranged vertically and in parallel, each flow channel pipeline being arranged at equal intervals and covering the entire middle area of ​​the heat collecting plate body. The oil dispersed from the upper flow averaging area (5) flows evenly and smoothly through the plurality of flow channel pipelines, without dead corners or oil residue areas.

5. The oil full circulation heat collecting plate according to claim 3, characterized in that: The lower flow-averaging area (3) adopts a grid-shaped pipeline, and the working medium outlet (6) located at the bottom of the heat collecting plate body is arranged on one side of the grid-shaped pipeline.

6. The oil full circulation heat collecting plate according to claim 5, characterized in that: The lowest transverse branch of the grid-shaped pipeline in the lower flow-averaging area (3) is slightly inclined toward the working medium outlet (6) located at the bottom of the heat collecting plate body.

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