CN214371008U

CN214371008U - Even efficient heat accumulation board

Info

Publication number: CN214371008U
Application number: CN202120186568.2U
Authority: CN
Inventors: 唐玉敏
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-10-08
Anticipated expiration: 2031-01-22

Abstract

The utility model relates to a solar energy heat-collecting plate manufacturing field, the distribution of the gaseous working medium of the existing heat-collecting plate is staggered, the gaseous working medium can not be fully utilized, the liquid working medium is easy to accumulate at low temperature, the utility model provides a uniform and efficient heat-collecting plate, which comprises a panel body, wherein the panel body is internally provided with a working medium flow passage, a working medium inlet, a working medium outlet and an oil return pipe which are respectively connected with the working medium flow passage; the working medium channels are criss-cross to form an evaporation area, so that the working medium has enough evaporation area and is uniformly evaporated, the working medium inlet and the working medium outlet are respectively positioned at two sides of the top of the evaporation area, and the oil return pipe is positioned at the bottom of the evaporation area; the working medium outlet is formed in the top of the evaporation area, gaseous working medium is led out in time, and meanwhile the oil return pipe at the bottom of the evaporation area is provided with the flow-limiting necking, so that liquid working medium is prevented from being sucked out, the smooth oil return of the system is ensured, and the utilization rate and the energy efficiency ratio are improved.

Description

Even efficient heat accumulation board

Technical Field

The utility model relates to a solar energy heat-collecting plate makes the field, concretely relates to even efficient heat-collecting plate.

Background

The heat collecting plate is an important component of solar energy heteromultimeric heat supply equipment, an oil liquid flow passage is fully distributed in the heat collecting plate, and the heat in the environment is absorbed through (liquid-gas) phase state change when a working medium flows through the flow passage, so that the aim of improving the energy efficiency is fulfilled. In the existing heat-collecting plate arrangement structure, a flow channel usually adopts a mode of entering and exiting from the bottom by oil (liquid in the oil is a working medium, which is called working medium for short; oil is lubricating oil and is used for lubricating a compressor), and after long-term use, the following defects of the existing heat-collecting plate are found:

the oil and the working medium are in a mutually soluble state, the solubility of the oil can be greatly reduced along with the reduction of the temperature of the working medium, the oil and the liquid of the working medium can be separated in the heat-collecting plate, and the separated oil can not be evaporated and naturally sinks after being influenced by gravity. The accumulated oil at the bottom cannot be taken away by the heat collecting plates in the form of downward entering and upward exiting, the accumulated oil is accumulated for a long time, the oil return is not smooth, the oil shortage of the system is caused, the service life of the compressor is further influenced, and the system efficiency is greatly reduced after the lubrication and the sealing of mechanical equipment due to the oil shortage.

Particularly, the oil return is aggravated under the environment temperature of extremely cold working conditions. If the temperature is between 10 ℃ below zero and 30 ℃ below zero, the ambient temperature is closer to the boiling point of the working medium, the difference between the ambient temperature and the boiling point of the working medium is smaller, and the phase change of the working medium in the flow channel tends to be mild. The volume of the working medium is expanded when the working medium is converted from liquid state to gas state, and partial lubricating oil can be wrapped by the expanded gas working medium when the expanded gas working medium returns from the runner through the upper outlet. And the phase state changes tend to be mild, so that the activity of the gaseous working medium is weakened, the oil return capability of the gaseous working medium is further weakened, even the oil return is completely lost, lubricating oil can be continuously accumulated in a flow channel (at the bottom or the edge of the heat collecting plate) after the compressor works under extremely cold working conditions for a long time, and finally the compressor can fail due to the lack of the lubricating oil and cannot work.

Therefore, a chinese patent with a patent number of 2020202898119 appears, which discloses a heat-collecting plate with high energy efficiency ratio and stable operation, comprising a panel body, wherein a working medium flow passage is arranged in the panel body, the panel body is further provided with a working medium inlet and a working medium outlet which are respectively connected with the working medium flow passage, the working medium inlet is positioned at the top of the working medium flow passage, and the working medium outlet is positioned at the bottom of the flow passage.

According to the technical scheme, the flow channel is provided with the path from top to bottom, the liquid working medium flows in the flow channel under the pushing of the gravity, the gravity is converted into a part of the flowing power of the liquid working medium, the system resistance is reduced, and the power consumption of the compressor is reduced, so that the energy efficiency can be improved. After oil and liquid are separated, oil is naturally deposited at the lowest position of the heat collecting plate under the influence of gravity, and can smoothly return to the compressor from an oil return pipe with a slight inclination angle, so that the service life and the efficiency of the compressor are guaranteed, and the working stability is improved.

In the actual use process, because the working medium outlet is positioned at the lower part of the evaporation area, and the mass of the gaseous working medium slightly floats upwards, although a balance pipeline for guiding the gaseous working medium to flow is arranged, the flowing state of the gaseous working medium is not ideal enough, so that the evaporated gaseous working medium cannot be fully utilized by the system; the liquid working medium needs to pass through the S-shaped evaporation areas connected end to end, the evaporation area of the liquid working medium is large, but the path is not smooth enough, the liquid working medium is influenced by gravity and can sink at an increased speed, the incomplete evaporation condition can occur under the extremely low temperature working condition, the unevaporated liquid working medium can return to the compressor from the bottom of the heat collecting plate, and great hidden dangers are caused to the service life of the compressor, the operation stability and the like.

Therefore, the existing heat-collecting plate is urgently needed to be improved, the compatibility of pipeline arrangement of an evaporation area is improved, and a gaseous working medium is developed to be more fully utilized, the evaporation path of a liquid working medium is simple, and meanwhile, the oil return is smooth.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that it is crisscross to overcome above-mentioned current heat-collecting plate gaseous state liquid working medium distribution, gaseous state working medium can not make full use of's problem provides a function distribution is clear, the oil return is smooth and easy and even efficient heat-collecting plate.

In order to achieve the above object, the utility model discloses a following technical scheme can realize: a uniform and efficient heat-collecting plate comprises a panel body, wherein a working medium flow passage, a working medium inlet, a working medium outlet and an oil return pipe are arranged in the panel body and are respectively connected with the working medium flow passage; the working medium flow passages are criss-cross and form an evaporation area, the working medium inlet and the working medium outlet are respectively positioned at two sides of the top of the evaporation area, and the oil return pipe is positioned at the bottom of the evaporation area.

The utility model discloses further preferred scheme does: the oil return pipe is provided with two flow-limiting necking ports for preventing the system from sucking out liquid working media due to overlarge suction force, so that the compressor is prevented from being impacted by liquid.

The utility model discloses further preferred scheme does: and a liquid inlet shunting area for shunting liquid inlet is further arranged between the working medium inlet and the evaporation area, and the liquid inlet shunting area is formed by latticed working medium flow channels.

The utility model discloses further preferred scheme does: and a gaseous communication area used for guiding gaseous working media to the working medium outlet is arranged between the working medium outlet and the evaporation area, the gaseous communication area is formed by latticed working medium flow channels, and the gaseous communication area penetrates through the evaporation area from top to bottom.

According to the scheme, the evaporated gaseous working medium is guided to the working medium outlet through the gaseous communication area.

The utility model discloses further preferred scheme does: the working medium outlet is connected with an air return main flow passage, and the tail end of the air return main flow passage is intersected with the tail end of the oil return pipe.

The utility model discloses further preferred scheme does: the evaporation area is internally provided with a flow extending part used for conveying liquid working medium in the horizontal direction, the flow extending part is positioned below the working medium inlet and extends from the working medium inlet side to the working medium outlet side to form a flow extending area.

By arranging the plurality of extension flow areas, the sinking speed of the working medium under the action of gravity is slowed down, and the working medium diffusion space is enlarged, so that the liquid working medium can be fully evaporated.

The utility model discloses further preferred scheme does: the extension flow areas are provided with a plurality of layers from top to bottom, and a flow equalizing part facilitating uniform diffusion of liquid working media is arranged between every two adjacent extension flow areas.

The lower part of the flow extension area is provided with a flow equalizing area, so that the liquid working medium can be uniformly diffused to two ends, and the temperature balance of each part is ensured.

The utility model discloses further preferred scheme does: the length of the panel body in the horizontal direction is greater than or equal to the length of the panel body in the vertical direction; the working medium flow passage in the evaporation area comprises a transverse flow passage and a longitudinal flow passage, wherein the transverse flow passage and the longitudinal flow passage are intersected and the intersection is in a T shape.

The utility model discloses further preferred scheme does: the length of the panel body in the horizontal direction is less than or equal to the length of the panel body in the vertical direction; the working medium flow passage in the evaporation area comprises a transverse flow passage and a longitudinal flow passage, wherein the transverse flow passage and the longitudinal flow passage are intersected and the intersection is in a cross shape.

The utility model discloses further preferred scheme does: the evaporation area is also internally provided with a short-flow prevention part for preventing the liquid working medium in the working medium flow passage from directly entering the working medium outlet in a short path; the short-flow prevention part is arranged along the vertical direction.

To sum up, the utility model discloses following beneficial effect has: through set up a working medium export at the evaporation zone top, in time derive the gaseous state working medium in the gaseous state UNICOM district, guarantee that the required gaseous state working medium of system can be utilized by the maximum, set up through each region of evaporation zone, the even abundant evaporation of guide working medium, improve utilization ratio and energy efficiency ratio, the time oil pipe in the evaporation zone bottom sets up the current-limiting throat, in order to prevent that the too big liquid working medium of leading to of system suction directly flows out and restriction oil return speed, because the density of lubricating oil is bigger than liquid working medium, even there is the liquid working medium that does not convert into the gaseous state also can float above the lubricating oil, so can guarantee that lubricating oil preferentially gets into oil pipe, the oil return is smooth and easy, protect compressor operation condition, increase of service life.

Drawings

FIG. 1 is a schematic view of the structure of a heat collecting plate described in example 1.

Fig. 2 is an enlarged view at a in fig. 1.

FIG. 3 is a schematic view of the heat collecting plate of example 2.

Wherein:

1. a working medium inlet; 2. liquid inlet separation area; 3. a gaseous communication zone; 4. a main air return channel; 5. an oil return pipe; 6. a gas-oil confluence pipe; 7. a working medium outlet; 71. a second outlet for working medium; 8. a short flow prevention section; 9. a flow delaying part; 10. a current equalizing section; 11. and (4) flow limiting and necking.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Example 1:

as shown in fig. 1 and 2, the present embodiment shows a uniform and efficient heat collecting plate, which includes a panel body having a length in a horizontal direction greater than a length in a vertical direction. When the panel body is used, the panel body is vertically arranged on the outer surface of a wall body or is arranged in an open-air inclined mode through a fixing frame (in addition, the panel can also be in an arc shape according to the requirement of actual conditions). The panel body is internally provided with a working medium flow passage, a working medium inlet 1, a working medium outlet 7 and an oil return pipe 5 which are respectively connected with the working medium flow passage. The working medium flow passages are criss-cross and form an evaporation area, the working medium inlet 1 and the working medium outlet 7 are respectively positioned on two sides of the top of the evaporation area, and the oil return pipe 5 is positioned at the bottom of the evaporation area. And the oil return pipe 5 is provided with a flow-limiting necking 11 for preventing the system from sucking out liquid working medium due to overlarge suction force.

Because the length of the panel in the horizontal direction is greater than that in the vertical direction, the downward flowing speed of the liquid working medium needs to be delayed, and the liquid working medium is prevented from directly flowing into the oil return pipe 5 without flowing to the working medium outlet 7 side along the horizontal direction. Specifically, the working medium flow passage of the evaporation area comprises a horizontal transverse flow passage and a vertical longitudinal flow passage, the vertical longitudinal flow passages are connected in a staggered manner, staggered branches are respectively formed on the upper side and the lower side of the transverse flow passage, so that the transverse flow passage and the longitudinal flow passage are converged mutually, and the intersection is in a T shape, thereby relatively increasing the flow path of the liquid working medium in the horizontal direction, further prolonging the time for the liquid working medium to stay in the evaporation area, fully absorbing heat in the stay time as far as possible, and improving the conversion rate of the liquid working medium into the gaseous working medium.

A liquid inlet shunting area for shunting liquid inlet is further arranged between the working medium inlet 1 and the evaporation area, and the liquid inlet shunting area is formed by latticed working medium flow passages. One side of the latticed working medium runner in the liquid inlet shunting area is communicated with the working medium inlet 1, and the other side of the latticed working medium runner is communicated with the working medium runner in the evaporation area.

A gaseous communication area 3 for guiding gaseous working media to the working media outlet 7 is further arranged between the working media outlet 7 and the evaporation area, the gaseous communication area 3 is formed by latticed working media flow channels, and the gaseous communication area 3 penetrates through the evaporation area from top to bottom.

In order to make air return smoother, the working medium outlet 7 is connected with an air return main flow passage 4, and the tail end of the air return main flow passage 4 is intersected with the tail end of the oil return pipe 5. In this embodiment, the air return main flow passage 4 adopts a longitudinal and transverse double flow passage design, so that it is ensured that there is enough flow passage area for the air to flow and the pressure is balanced, and after the tail end of the air return main flow passage 4 is intersected with the tail end of the oil return pipe 5, the air return main flow passage is connected with the air-oil converging pipe 6, so that the gaseous working medium and the lubricating oil are converged in the air-oil converging pipe and then return to the compressor of the working system where the panel body is located.

The evaporation area is internally provided with a flow extending part 9 used for conveying liquid working medium in the horizontal direction, the flow extending part 9 is positioned below the working medium inlet 1, and the working medium inlet 1 extends to the working medium outlet 7 side to form a flow extending area. Or the density of the longitudinal flow channels in the flow extending area is less than that of the longitudinal flow channels in the evaporation area.

The extension flow areas are provided with a plurality of layers from top to bottom, and a flow equalizing part 10 facilitating uniform diffusion of liquid working media is arranged between every two adjacent extension flow areas. In this embodiment, the lengths of the horizontal flow channels and the vertical flow channels around the flow equalizing portion 10 are equal, that is, the flow equalizing portion 10 is square.

Example 2:

as shown in fig. 3, another embodiment of a uniform and high-efficiency heat-collecting plate is shown, and the heat-collecting plate in example 2 is mainly different from the heat-collecting plate in example 1 in that the length of the panel body in the horizontal direction is smaller than that in the vertical direction; the working medium flow passage in the evaporation area comprises a transverse flow passage and a longitudinal flow passage, wherein the transverse flow passage and the longitudinal flow passage are intersected and the intersection is in a cross shape. The transverse flow channel is intersected with the longitudinal flow channel, and the evaporation area is divided into a plurality of small grids with equal areas.

The evaporation area is also internally provided with a short-flow prevention part 8 for preventing the liquid working medium in the working medium flow passage from directly entering the gas communication area 3; the short-flow prevention portion 8 is provided in the vertical direction. In this embodiment, the short-flow prevention portion 8 is rectangular, and the rectangle is arranged in the vertical direction. The short flow prevention parts 8 are provided in plural, the short flow prevention parts 8 are provided in parallel, and the heights thereof are gradually decreased or increased, and the successive short flow prevention parts 8 form steps of different heights. In addition, the flow delaying part 9 is also arranged below the short-flow preventing part 8 in a certain ladder, so that the liquid working medium flowing down along the short-flow preventing part 8 can flow in the horizontal direction, a buffering effect is achieved, the direct filling into a working medium flow channel below is avoided, and the evaporation is fully completed in a tube pass flow channel.

In order to make the air return smoother, a working medium second outlet 71 is arranged at the middle position of one side of the evaporation area, the working medium second outlet 71 is communicated with the air return main flow passage 4, so that the gaseous working medium in the lower evaporation area can enter the air return main flow passage 4 as soon as possible, and the tail end of the air return main flow passage 4 is converged with the tail end of the oil return pipe 5. In the embodiment, the air return main flow passage 4 adopts a longitudinal flow passage design, so that the system reduces the resistance of the flow passage to do work when sucking out gaseous working media.

Claims

1. A uniform and efficient heat-collecting plate comprises a panel body, wherein a working medium flow passage, a working medium inlet, a working medium outlet and an oil return pipe are arranged in the panel body and are respectively connected with the working medium flow passage; the working medium flow passages are criss-cross and form evaporation areas; the device is characterized in that the working medium inlet and the working medium outlet are respectively positioned at two sides of the top of the evaporation area, and the oil return pipe is positioned at the bottom of the evaporation area.

2. The uniform and efficient heat collection plate according to claim 1, wherein said oil return tube is provided with a flow-limiting constriction for preventing the system from sucking out the liquid working medium due to excessive suction.

3. The uniform and efficient heat collecting plate as claimed in claim 1, wherein a liquid inlet splitting area for splitting liquid inlet is further provided between the working medium inlet and the evaporation area, and the liquid inlet splitting area is formed by latticed working medium flow channels.

4. The uniform and efficient heat collecting plate as recited in claim 1, further comprising a gas communication area between the working medium outlet and the evaporation area for guiding the gas working medium to the working medium outlet, wherein the gas communication area is formed by a grid-shaped working medium flow channel and penetrates through the evaporation area from top to bottom.

5. The uniform and efficient heat collecting plate as recited in claim 1, wherein said working medium outlet is connected with a return air main flow channel, and the end of said return air main flow channel is converged with the end of said return oil pipe.

6. The uniform and efficient heat collecting plate as claimed in claim 1, wherein said evaporation area is provided with a flow extending portion for horizontally conveying the liquid working medium, the flow extending portion is located below said working medium inlet, and extends from the working medium inlet side to the working medium outlet side to form a flow extending area.

7. The uniform and efficient heat collecting plate as claimed in claim 6, wherein said extension flow areas are provided with a plurality of layers from top to bottom, and a flow equalizing portion facilitating uniform diffusion of liquid working medium is provided between two adjacent extension flow areas.

8. The uniform, high efficiency heat collection plate as claimed in claim 4 wherein the length of the panel body in the horizontal direction is greater than or equal to the length in the vertical direction; the working medium flow passage in the evaporation area comprises a transverse flow passage and a longitudinal flow passage, wherein the transverse flow passage and the longitudinal flow passage are intersected and the intersection is in a T shape.

9. The uniform, high efficiency heat collection plate as claimed in claim 1 wherein the length of the panel body in the horizontal direction is less than or equal to the length in the vertical direction; the working medium flow passage in the evaporation area comprises a transverse flow passage and a longitudinal flow passage, wherein the transverse flow passage and the longitudinal flow passage are intersected and the intersection is in a cross shape.

10. The uniform and efficient heat collecting plate as recited in claim 9, wherein the evaporation zone is further provided with a short-flow preventing portion for preventing the liquid working medium in the working medium flow passage from directly entering the working medium outlet in a short path; the short-flow prevention part is arranged along the vertical direction.