A coil-type evaporative condenser

Abstract

The present invention relates to the technical field of heat exchangers, and particularly relates to a coil-type evaporative condenser, comprising: a housing (1); a plurality of single-row multi-layer coils (2), which are vertically arranged inside the housing (1), and each layer of the coil (2) is in a wavy shape, and the wave crests (211) and wave troughs (212) of adjacent two layers are arranged corresponding to each other; at least one cooling pipe (3), which is arranged above the coil (2), and a plurality of openings (31) allowing coolant to drip are formed on the side wall of the cooling pipe (3) facing the coil (2), and the openings (31) are correspondingly arranged at the wave crests (211) of the top-layer coil (2). The present invention provides a coil-type evaporative condenser with high heat exchange efficiency and water resource saving.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and particularly to a coil type evaporative condenser. Background Art

[0002] With the development of industry, water resources and energy in our country are very tense. Energy conservation is known as the "fifth energy" besides water, coal, oil and natural gas. And the energy consumption phenomenon in the refrigeration process involved in various industrial processes and equipment in our country is very serious. For the same condensation load, several times more energy is often consumed than in foreign countries. In industrial production, cooling water accounts for more than 70%. Direct discharge of cooling water will cause thermal pollution, economic and resource waste. At present, water conservation and energy conservation have become a basic national policy in our country. The evaporative condenser is one of the key equipment for the reuse of cooling water. In addition, the energy crisis and water environmental protection have also promoted the research and application of evaporative condensers. At present, most of the evaporative condensers on the market use straight pipes with diameters of φ16, φ19, and φ25. The large pipe diameter results in a small heat transfer area per unit volume, and the straight pipe type has no strengthening effect on the heat transfer of the fluid in the pipe.

[0003] To solve the above technical problems, Chinese patent document CN205174940U discloses an evaporative condenser using an Ω pipe type, including: a shell, in which an air inlet filter, a pre-cooler, a spraying device, an Ω type evaporative condenser and a water baffle are vertically arranged in sequence from right to left in the inner cavity of the shell. A ventilation opening is arranged on one side of the shell close to the water baffle, a water distributor is arranged at the bottom of the shell, a water tank and a water pump are arranged below the water distributor, the water pump pipeline is connected to the spraying device, and refrigerant pipeline inlets / outlets are respectively arranged at the bottoms of the Ω type evaporative condenser and the pre-cooler. It can be clearly seen from the specification and the Figure 1 appendix that a plurality of nozzles are installed on the spraying device to atomize water. Although this ensures the uniform distribution of water to a certain extent, the atomized water is easily carried away by the fan, resulting in waste of water resources; moreover, the spraying direction is perpendicular to the falling direction of water, causing the upper part of the condenser not to fully exchange heat with water, and the heat exchange efficiency is low. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of low heat exchange efficiency and serious waste of water resources in the existing evaporative condensers, so as to provide a coil type evaporative condenser with high heat exchange efficiency and water resource conservation.

[0005] To solve the above technical problems, the present invention provides a coil type evaporative condenser, including:

[0006] A shell;

[0007] A plurality of single-row multi-layer coils, vertically arranged inside the shell, each layer of the coil is wavy, and the wave crests and wave troughs of adjacent layers are arranged correspondingly;

[0008] At least one cooling pipe is arranged above the coil pipe. A plurality of openings allowing the coolant to drip are formed on the side wall of the cooling pipe facing the coil pipe, and the openings are correspondingly arranged at the wave crests of the coil pipes located at the top layer.

[0009] For the coil type evaporative condenser, the cooling pipes are a plurality of parallelly arranged on the same horizontal plane. The plurality of cooling pipes are correspondingly arranged with the coil pipes one by one, and one ends of the plurality of cooling pipes are all connected to a cooling main pipe, and the cooling main pipe is connected to a liquid collecting tank arranged at the bottom of the housing.

[0010] For the coil type evaporative condenser, the coil pipe includes a plurality of sub-pipes parallelly distributed in the vertical direction, and the wavy shape of each sub-pipe is formed by a plurality of "Ω" protruding upward and downward. The centers of the "Ω" protruding upward and the "Ω" protruding downward of two adjacent sub-pipes of the same coil pipe are located on the same vertical line.

[0011] For the coil type evaporative condenser, the openings are correspondingly arranged at the highest points of the "Ω" protruding upward of the sub-pipes.

[0012] For the coil type evaporative condenser, the outlets and inlets of two adjacent sub-pipes of the same coil pipe are connected by a straight pipe.

[0013] For the coil type evaporative condenser, the cooling main pipe is connected to the liquid collecting tank through a connecting pipe, and a water pump is installed on the connecting pipe.

[0014] For the coil type evaporative condenser, it further includes a plurality of support pipes for supporting the coil pipe, and two ends of the support pipes are installed on the side walls of the housing.

[0015] For the coil type evaporative condenser, the support pipes are installed at the centers of the "Ω" forming the wave crests.

[0016] For the coil type evaporative condenser, an air inlet is further arranged at the lower part of the side wall of the housing, and an air outlet is arranged at the upper part of the housing.

[0017] For the coil type evaporative condenser, a fan is installed at the air outlet.

[0018] The technical solution of the present invention has the following advantages:

[0019] 1. The coil - type evaporative condenser provided by the present invention has the condensate in the cooling tubes dripping onto the crests of the lower - layer coils through a number of openings formed on the side walls facing the coils, and gathering along the tube walls of the crests towards the troughs, and then dripping onto the crests of the coils in the next lower layer, and so on. Thus, it is realized that the condensate dripping from the cooling tubes can fully contact and exchange heat with the coils, with high heat - exchange efficiency. And since the coolant drips onto the coils in the form of liquid droplets, which are relatively large in volume and weight and are not easily carried away by the fan, but gather at the bottom of the housing for recycling, water resources are saved.

[0020] 2. In the coil - type evaporative condenser provided by the present invention, a number of cooling tubes are arranged in one - to - one correspondence with the coils, and one ends of the number of cooling tubes are all connected to a cooling main pipe, and the cooling main pipe is connected to a liquid - collecting tank arranged at the bottom of the housing. This not only enables the recycling of the coolant and saves resources, but also makes the spraying more targeted and accurate. Each row of coils can be in full contact with the coolant simultaneously, improving the heat - exchange efficiency.

[0021] 3. In the coil - type evaporative condenser provided by the present invention, the coil includes a number of sub - tubes distributed in parallel in the vertical direction, and the wavy shape of each sub - tube is formed by a number of "Ω" protruding upwards and downwards, and the centers of the "Ω" protruding upwards and downwards of two adjacent sub - tubes in the same coil are located on the same vertical line. Thus, the coolant flowing out of the cooling tubes first drips onto the tops of the "Ω" of each sub - tube, and then diverges along the "Ω" to both sides. The coolant flowing down from the adjacent tops gathers at the bottom of the "Ω" and drips onto the tops of the "Ω" in the next lower layer, and so on. Thereby, it is ensured that all the coolant can fully contact and exchange heat with the sub - tubes, increasing the heat - exchange capacity and ensuring the heat - exchange effect.

[0022] 4. The coil - type evaporative condenser provided by the present invention further includes a number of support tubes for supporting the coils, and both ends of the support tubes are installed on the side walls of the housing. This avoids the problem of high difficulty in installation and fixation due to the complex structure of the coils, and at the same time ensures the reliability of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following - described drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 is a schematic diagram of the external structure of the coil - type evaporative condenser provided by the present invention;

[0025] Figure 2 is Figure 1Partial schematic diagram of the internal structure therein;

[0026] Figure 3 is Figure 2 rear view of;

[0027] Figure 4 is Figure 3 enlarged schematic diagram of part A in.

[0028] Explanation of reference numerals:

[0029] 1 - housing; 2 - coil; 3 - cooling pipe; 4 - main cooling pipe; 5 - connecting pipe; 6 - water pump; 7 - support pipe; 8 - fan; 9 - gas collecting pipe; 10 - liquid collecting pipe; 11 - box body; 12 - liquid collecting tank; 21 - sub - pipe; 22 - straight pipe; 31 - opening; 211 - wave crest; 212 - wave trough. Detailed implementation manners

[0030] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0031] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] As Figures 1-4 shown, a specific implementation manner of a coil - type evaporative condenser includes: a housing 1 and a plurality of single - row multi - layer coils 2 and a corresponding number of cooling pipes 3 arranged inside the housing 1. The housing 1 includes a box body 11 arranged on the upper part and a liquid collecting tank 12 arranged on the lower part; a plurality of single - row multi - layer coils 2 are vertically arranged inside the box body 11 and are arranged parallel to each other at intervals. Each layer of the coil 2 is in a wavy shape, and the wave crests 211 and wave troughs 212 of adjacent layers are arranged corresponding to each other, that is, they are arranged in a staggered manner layer by layer; the cooling pipes 3 are arranged above the coils 2 and are arranged in one - to - one correspondence. A plurality of openings 31 allowing the coolant to drip are formed on the side wall of the cooling pipe 3 facing the coil 2, and the openings 31 are arranged corresponding to the wave crests 211 of the top - layer coils 2, that is, the number of the openings 31 is the same as the number of the wave crests 211 of the top - layer coils 2. The coolant in this embodiment is water.

[0033] As Figure 2As shown, a plurality of the cooling pipes 3 are arranged in parallel on the same horizontal plane, and the distance between adjacent two cooling pipes 3 is equal to the distance between adjacent two single-row multi-layer coiled pipes 2 below. The left ends of the plurality of the cooling pipes 3 are all connected to a cooling main pipe 4, and the right ends are closed. The axial direction of the cooling main pipe 4 is perpendicular to the axial direction of the cooling pipes 3, and the cooling main pipe 4 is connected to a liquid collecting tank 12 arranged at the bottom of the housing 1 through a connecting pipe 5. A water pump 6 is installed at a position of the connecting pipe 5 close to the liquid collecting tank 12 to pump the cooling water collected in the liquid collecting tank 12 back into the cooling main pipe 4 again to realize recycling.

[0034] As Figure 3 and 4 shown, the coiled pipe 2 includes a plurality of sub-pipes 21 distributed in parallel in the vertical direction, and the wavy shape of each sub-pipe 21 is formed by a plurality of "Ω" protruding upward and downward. The centers of the "Ω" protruding upward and downward of adjacent two sub-pipes 21 of the same coiled pipe 2 are located on the same vertical line. The outlets and inlets of adjacent two sub-pipes 21 of the same coiled pipe 2 are connected by a straight pipe 22, thereby forming a path that bends back and forth multiple times, and only a working medium inlet and a working medium outlet are reserved at the upper layer and the bottom layer of the coiled pipe 2 respectively. The working medium inlet is connected to a gas collecting pipe 9, and the working medium outlet is connected to a liquid collecting pipe 10. The heights of the "Ω" of all the sub-pipes 21 are the same, and the sizes and bending degrees are also the same, so that the overall structure of the coiled pipe 2 is symmetric up and down, that is, the wave crests 211 or wave troughs 212 of the sub-pipes 21 are completely corresponding to the wave troughs 212 or wave crests 211 of the adjacent rows of sub-pipes 21.

[0035] Specifically, the opening 31 of the cooling pipe 3 is arranged corresponding to the highest point of the "Ω" protruding upward of the sub-pipe 21, and the size of the opening 31 is set according to actual needs and can be slightly smaller than the diameter of the sub-pipe 21. The water dripping from the opening 31 of the cooling pipe 3 slides down along the wall of the "Ω" of the sub-pipe 21 from high to low under the action of gravity until it converges at the lowest point, so as to fully contact and exchange heat with the sub-pipe 21.

[0036] As a specific embodiment, as Figure 2 shown, it further includes a plurality of support pipes 7 for supporting the coiled pipe 2, and both ends of the support pipes 7 are installed on the side walls of the housing 1. The plurality of support pipes 7 are distributed approximately evenly in the gaps between the coiled pipes 2. In this embodiment, 2-3 support pipes 7 are installed at intervals on each layer of sub-pipes 21, and 3 support pipes 7 are arranged at intervals in the middle of each column of coiled pipes 2. The support pipes 7 are installed at the center of the "Ω" forming the wave crest 211, that is, below the wave crest 211, to increase the contact area and make the support more stable.

[0037] As Figure 1As shown, an air inlet is further provided at the lower part of the side wall of the housing 1. Specifically, the air inlet is arranged at the connection between the box body 11 and the liquid collecting box 12 to blow air into the interior; an air outlet is provided at the upper part of the housing 1, and a fan 8 is installed at the air outlet. After the cooling water absorbs heat, a small part of it undergoes a phase change and is discharged from the air outlet under the drive of the fan 8.

[0038] As an alternative implementation manner, the cooling pipe 3 can also be one that is bent multiple times, including a plurality of straight pipe segments arranged in parallel and elbow pipe segments for connecting adjacent two straight pipe segments. The distance between adjacent two straight pipe segments is equal to the distance between two rows of coil pipes 2, and a plurality of openings are formed on the side of the straight pipe segment facing the coil pipe 2 to ensure that the water dripping from the straight pipe segment can completely adhere to the coil pipe 2 below.

[0039] As an alternative implementation manner, the wavy shape of each sub-pipe 21 can also be a sine or cosine wave shape, as long as it is a corrugated shape with a plurality of highest points and lowest points arranged at intervals.

[0040] As an alternative implementation manner, a plurality of inclined rods can also be provided on both sides of each row of coil pipes 2 inside the housing 1 for support.

[0041] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A coil type evaporative condenser, characterized in that, Comprising: A housing (1); A plurality of single-row multi-layer coils (2), vertically arranged inside the housing (1), each layer of the coil (2) being wavy, and the crests (211) and troughs (212) of adjacent two layers being correspondingly arranged; At least one cooling pipe (3), arranged above the coil (2), a plurality of openings (31) allowing coolant to drip being formed on the side wall of the cooling pipe (3) facing the coil (2), and the openings (31) being correspondingly arranged at the crests (211) of the top layer of the coil (2).

2. The coiled tube type evaporation condenser according to claim 1, characterized in that, The cooling pipes (3) are a plurality of parallelly arranged in the same horizontal plane, the plurality of cooling pipes (3) being correspondingly arranged with the coils (2) one by one, and one ends of the plurality of cooling pipes (3) being all connected to a cooling main pipe (4), and the cooling main pipe (4) being connected to a liquid collecting tank (12) arranged at the bottom of the housing (1).

3. The coil type evaporative condenser according to claim 2, characterized in that, The coil (2) comprises a plurality of sub-pipes (21) parallelly distributed in the vertical direction, and the waviness of each sub-pipe (21) is formed by a plurality of "Ω" protruding upwards and downwards, and the centers of the "Ω" protruding upwards and the "Ω" protruding downwards of two adjacent sub-pipes (21) of the same coil (2) are located on the same vertical line.

4. The coil type evaporation condenser according to claim 3, wherein The openings (31) are correspondingly arranged at the highest points of the "Ω" protruding upwards of the sub-pipes (21).

5. The coil type evaporative condenser according to claim 3, characterized in that, The outlets and inlets of two adjacent sub-pipes (21) of the same coil (2) are connected by a straight pipe (22).

6. The coil type evaporative condenser according to any one of claims 2-5, characterized in that, The cooling main pipe (4) is connected to the liquid collecting tank (12) through a connecting pipe (5), and a water pump (6) is installed on the connecting pipe (5).

7. The coiled tube type evaporation condenser according to any one of claims 1-5, characterized in that, Also included are a plurality of support pipes (7) for supporting the coils (2), and two ends of the support pipes (7) are installed on the side walls of the housing (1).

8. The coiled tube type evaporative condenser according to claim 7, wherein, The support pipes (7) are installed at the centers of the "Ω" forming the crests (211).

9. The coil-type evaporative condenser according to any one of claims 1-5, characterized in that, An air inlet is also arranged at the lower part of the side wall of the housing (1), and an air outlet is arranged at the upper part of the housing (1).

10. The coiled tube type evaporative condenser according to claim 9, wherein, A fan (8) is installed at the air outlet.

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