CN219473853U

CN219473853U - Sleeve type indirect evaporative cooling air conditioner

Info

Publication number: CN219473853U
Application number: CN202320685889.6U
Authority: CN
Inventors: 周文和; 顾发永; 徐茂森; 程烁; 张文翔
Original assignee: Lanzhou Jiaotong University
Current assignee: Lanzhou Jiaotong University
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-08-04
Anticipated expiration: 2033-03-31

Abstract

The utility model discloses a sleeve type indirect evaporative cooling air conditioner, which belongs to the technical field of air conditioning equipment and comprises an upper box body, a main box body and a lower box body which are sequentially arranged up and down, wherein baffle plates are arranged between the upper end and the lower end of the main box body and between the upper end and the lower end of the main box body respectively; the main box body is internally provided with a heat exchange tube, the upper end of the heat exchange tube extends to the upper box body, and the lower end of the heat exchange tube extends to the lower box body; a primary air inlet is arranged above one side wall of the main box body, and a primary air outlet is arranged below the opposite side wall; the body wall of the upper box body is provided with a secondary air inlet and a secondary air outlet, and secondary air flows into the heat exchange pipe from the secondary air inlet, flows out of the heat exchange pipe and is discharged from the secondary air outlet; the upper box body is internally provided with a water distribution device for distributing water to the heat exchange tubes, the lower box body is internally provided with a water tank, and the water tank is communicated with the water distribution device through a circulating water pipe. The cooling air conditioner disclosed by the utility model has the advantages that the dry and wet channels are completely separated, so that primary air is not contacted with water, and the primary air is prevented from being humidified.

Description

Sleeve type indirect evaporative cooling air conditioner

Technical Field

The utility model relates to the technical field of air conditioning equipment, in particular to a sleeve type indirect evaporative cooling air conditioner.

Background

The basic principle of the evaporative cooling technology is to use heat transfer generated when unsaturated air contacts with water to obtain cold energy, the cooling technology uses water as a refrigerant, no CFCs and HCFCs are discharged, the operation energy consumption is lower than that of the conventional direct expansion mechanical compression refrigeration mode, and the evaporative cooling technology is an economic, environment-friendly and sustainable development refrigeration technology and has wide application prospect in the fields of air conditioning and ventilation.

The evaporative cooling is mainly divided into two basic forms of direct evaporative cooling and indirect evaporative cooling, a dry-wet channel of the conventional vertical pipe type dew point indirect evaporative cooler is not completely separated, primary air is inevitably humidified in the operation process, and air is humidified when the temperature is reduced, so that the using effect is influenced. For example, in the riser dew point indirect evaporative cooling air conditioner disclosed in the patent No. cn202223301828.X, primary air flows downward and flows out from the lower tank, and moisture in the circulating water tank in the lower tank is inevitably carried away in the flowing process, so that the discharged primary air is humidified.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model aims to provide a sleeve type indirect evaporative cooling air conditioner, wherein a dry channel and a wet channel are completely separated, so that primary air is not contacted with water, and the primary air is prevented from being humidified.

The technical scheme adopted for solving the technical problems is as follows:

the sleeve type indirect evaporative cooling air conditioner comprises an upper box body, a main box body and a lower box body which are sequentially arranged up and down, wherein a baffle is arranged between the upper end and the lower end of the main box body and the upper box body and between the upper end and the lower end of the main box body and the lower box body respectively;

a heat exchange tube is arranged in the main box body, the upper end of the heat exchange tube extends to the upper box body, and the lower end of the heat exchange tube extends to the lower box body; a primary air inlet is formed above one side wall of the main box body, and a primary air outlet is formed below the opposite side wall;

a secondary air inlet and a secondary air outlet are formed in the body wall of the upper box body, and secondary air flows into the heat exchange tube from the secondary air inlet, flows out of the heat exchange tube and is discharged from the secondary air outlet;

the upper box body is internally provided with a water distribution device for distributing water to the heat exchange tubes, the lower box body is internally provided with a water tank, and the water tank is communicated with the water distribution device through a circulating water tube.

Further, the upper box body comprises a first upper box body and a second upper box body which are arranged up and down, and the first upper box body is separated from the second upper box body through a partition board; the secondary air inlet is positioned on the wall of the first upper box body, and the secondary air outlet is positioned on the wall of the second upper box body.

Further, the heat exchange tube comprises an outer tube and an inner tube, wherein the upper end and the lower end of the outer tube extend from the baffle respectively, the upper end of the inner tube extends from the baffle, and the lower end of the inner tube extends from the baffle below; the upper end and the lower end of the inner tube and the outer tube are both open ends.

Further, the water distribution device comprises a water distribution pipe and an overflow disc, one end of the water distribution pipe is communicated with the circulating water pipe, and the other end of the water distribution pipe conveys water into the overflow disc; the water in the overflow disc can be led into the cavity between the inner pipe and the outer pipe through the water diversion rope, and a water film is formed on the pipe wall.

Further, the overflow disc comprises an outer tube overflow disc and an inner tube overflow disc, wherein the outer tube overflow disc is positioned at the upper end of the outer tube, and the inner tube overflow disc is positioned above the outer tube overflow disc and on the outer body wall of the inner tube; the outer pipe overflow disc and the inner pipe overflow disc are respectively used for leading water to the inner pipe wall and the outer pipe wall of the outer pipe through water leading ropes.

Further, the water distribution pipe comprises an outer pipe water distribution pipe and an inner pipe water distribution pipe, the outer pipe water distribution pipe transmits water to the outer pipe overflow disc, and the inner pipe water distribution pipe transmits water to the inner pipe overflow disc.

Furthermore, the inner body wall of the outer tube and the outer body wall of the part of the inner tube below the inner tube overflow disc are respectively provided with a micro-channel, and the water diversion rope is fixed in the micro-channels.

Further, baffles positioned at the outer side of the heat exchange tube are arranged in the main box body, a plurality of baffles are arranged, and the baffles which are adjacent up and down are arranged in a staggered way to form a Z-shaped circulating channel of primary air.

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

1. the sleeve type indirect evaporative cooling air conditioner has the advantages that the dry channel and the wet channel are completely separated, and the inlet and the outlet of primary air are arranged on the main box body, so that the primary air cannot be contacted with water in the circulation process, and the humidity of the primary air cannot be increased;

2. the sleeve type indirect evaporative cooling air conditioner adopts the water distribution method of the overflow disc and the water diversion rope, and compared with a spraying method, a pipe inserting method, an overflow method and the like, the method can avoid the pressure drop of the wet channel side, simultaneously realize the uniform water distribution to the heat exchange pipe continuously, and in addition, the required lift and flow can be greatly reduced;

3. the sleeve type indirect evaporative cooling air conditioner provided by the utility model has the advantages that the baffle plates are arranged to enable the primary air to flow along the Z-shaped flow channel, so that the heat exchange effect of the cooling air conditioner is enhanced, and the performance of the sleeve type indirect evaporative cooling air conditioner is improved.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a partial structure of a main tank (not shown) with water distribution pipes;

fig. 3 is a cross-sectional view of the overflow pan.

In the figure: the water distribution device comprises a first upper box body, a second upper box body, a 3-main box body, a 4-lower box body, a 5-primary air inlet, a 6-primary air outlet, a 7-secondary air inlet, an 8-secondary air outlet, a 9-partition plate, a 10-baffle, an 11-outer pipe, a 12-inner pipe, a 13-outer pipe water distribution pipe, a 14-inner pipe water distribution pipe, a 15-outer pipe overflow disc, a 16-inner pipe overflow disc, a 17-diversion rope, an 18-micro channel, a 19-circulating water pipe, a 20-water tank and a 21-baffle plate.

Detailed Description

The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1-3, this embodiment provides a sleeve-type indirect evaporative cooling air conditioner, which includes an upper case, a main case 3 and a lower case 4 that are sequentially disposed up and down, and a baffle 10 is disposed between the upper and lower ends of the main case 3 and the upper and lower cases, respectively, so that the main case 3 forms an independent space. In this embodiment, the upper case includes a first upper case 1 and a second upper case 2 that are disposed up and down, and the first upper case 1 and the second upper case 2 are separated by a partition 9, so that an independent space is formed between the upper case and the lower case.

The main box body 3 is internally provided with a heat exchange tube, the upper end of the heat exchange tube extends to the upper box body, and the lower end of the heat exchange tube extends to the lower box body 4. Specifically, the heat exchange tube includes an outer tube 11 and an inner tube 12, the upper and lower ends of the outer tube 11 extend from the baffle 10 respectively, the upper end of the inner tube 12 extends from the baffle 9, the lower end extends from the baffle 10 below, that is, the length of the inner tube 12 is longer than that of the outer tube 11, and the upper end of the inner tube 12 extends from the outer tube 11 until the first upper case 1.

A primary air inlet 5 is arranged above one side wall of the main box body 3, a primary air outlet 6 is arranged below the opposite side wall, and the primary air inlet 5, the space outside the heat exchange tube and the primary air outlet 6 form a primary air circulation channel, namely a dry channel, and the primary air flows out from the outlet to the room after heat exchange and temperature reduction of the heat exchange tube. The inside of the main box body 3 is in an independent space, primary air only circulates in the main box body 3 and does not contact water and wet air, so that the discharged primary air cannot be humidified and the using effect of the cooling air conditioner cannot be influenced.

The wall of the upper box body is provided with a secondary air inlet 7 and a secondary air outlet 8, and secondary air flows into the heat exchange tube from the secondary air inlet 7, flows out of the heat exchange tube and is discharged from the secondary air outlet 8. In the present embodiment, the secondary air inlet 7 is located on one side of the first upper casing 1, and the secondary air outlet 8 is located on the opposite side of the second upper casing 2 from the secondary air inlet 7. The upper end and the lower end of the inner pipe 12 and the outer pipe 11 are both open ends, so that secondary air can flow into the heat exchange pipe from the upper end of the inner pipe 12, firstly, the inner pipe 12 is subjected to constant humidity cooling precooling, then flows downwards along the inner pipe 12 and enters a cavity between the inner pipe and the outer pipe from the opening at the lower end of the outer pipe 11, water is distributed between the inner pipe and the outer pipe, secondary air is subjected to evaporation cooling between the inner pipe and the outer pipe, flows upwards along the cavity between the inner pipe and the outer pipe to the opening at the upper end of the outer pipe 11, and is discharged from the secondary air outlet 8. The secondary air inlet 7, the inner pipe 12, the cavity between the inner pipe and the outer pipe, the secondary air outlet 8 form a secondary air flow channel, and the cavity between the inner pipe and the outer pipe forms a secondary air flow wet channel.

The upper box body is internally provided with a water distribution device for distributing water to the heat exchange tubes, the lower box body 4 is internally provided with a water tank 20, the water tank 20 is communicated with the water distribution device through a circulating water pipe 19, water in the water tank 20 flows to the water distribution device through the circulating water pipe 19 under the action of a circulating water pump, and the water distribution device sends the water to the heat exchange tubes for heat exchange.

Specifically, the water distribution device comprises a water distribution pipe and an overflow disc, one end of the water distribution pipe is communicated with the circulating water pipe 19, and the other end of the water distribution pipe transmits water into the overflow disc; the water in the overflow disc can be led into the cavity between the inner pipe and the outer pipe through the water diversion rope 17, and a water film is formed on the pipe wall.

In this embodiment, the overflow tray includes an outer tube overflow tray 15 and an inner tube overflow tray 16, the outer tube overflow tray 15 is located at the upper end of the outer tube, and the inner tube overflow tray 16 is located above the outer tube overflow tray and on the outer wall of the inner tube 12; the outer pipe overflow disc 15 and the inner pipe overflow disc 16 are respectively used for diversion water to the inner body wall of the outer pipe 11 and the outer body wall of the inner pipe 12 through diversion ropes 17. Correspondingly, the water distribution pipe comprises an outer pipe water distribution pipe 13 and an inner pipe water distribution pipe 14, wherein the outer pipe water distribution pipe 13 transmits water to an outer pipe overflow disc 15, and the inner pipe water distribution pipe 14 transmits water to an inner pipe overflow disc 16. The water in the water tank 20 is conveyed to each water distribution pipe through the circulating water pipe 19 and flows from the water distribution pipe to the overflow disc below, and the conveying modes of the water distribution pipe and the water are the prior art and are not described in detail herein; the water in the overflow disc is uniformly distributed by the capillary force of the water diversion rope 17, the water is conveyed into the cavity between the inner pipe and the outer pipe, and if the water drops, the water drops directly fall into the water tank 20, so that the water circulation is realized. Compared with a spraying method, a cannula method, an overflow method and the like, the water distribution method of the overflow disc and the water diversion ropes 17 is adopted, so that pressure drop on the wet channel side can be avoided, the water diversion ropes 17 are uniformly arranged in the micro-channels 18, continuous and uniform water distribution into the heat exchange tubes is realized, in addition, the waste of water can be reduced, the flow rate of the water is reduced, and meanwhile, the required lift is greatly reduced, so that the power consumption of the water pump is reduced. The diversion ropes 17 are arranged on the outer body wall of the inner pipe 12 and the inner body wall of the outer pipe 11, so that the diversion amount of water can be increased, and the heat exchange effect is improved.

In order to achieve uniform arrangement of the water diversion ropes 17 and stable arrangement in the heat exchange tubes, micro-channels 18 are arranged on the inner body wall of the outer tube 11 and the outer body wall of the part of the inner tube 12 located below the inner tube overflow disc 16, and the water diversion ropes 17 are fixed in the micro-channels 18. The uniform arrangement of the micro-channels 18 can uniformly and firmly arrange the water diversion ropes 17 in the heat exchange tube.

In addition, the circulating water can be subjected to softening treatment before use so as to slow down the scaling on the inner wall of the heat exchange tube and the hardening of the water diversion rope 17.

The inside of the main box body 3 is provided with a plurality of baffle plates 21 positioned at the outer side of the heat exchange pipe, the baffle plates 21 are arranged in a plurality, and the baffle plates 21 which are adjacent up and down are staggered to form a Z-shaped circulation channel of primary air, the Z-shaped circulation channel enhances the heat exchange effect of the cooling air conditioner, and the performance of the sleeve-type indirect evaporative cooling air conditioner is improved.

Working principle:

circulating water enters a water distribution pipe from the water tank 20 and flows to an overflow disc, water in the overflow disc is led between the inner pipe and the outer pipe 11 by the water diversion rope 17 to exchange heat with primary air, and heat of the primary air is absorbed; meanwhile, the primary air flows into the main box body 3 from the primary air inlet 5, flows along the Z-shaped flow channel under the action of the baffle plate 21, exchanges heat with the wet channel in the heat exchange tube, and is sent into the room from the primary air outlet 6 after heat exchange, so as to cool the room. Secondary air flows into the inner pipe 12 from the secondary air inlet 7, the secondary air is precooled in the inner pipe 12 firstly, then enters a cavity between the inner pipe and the outer pipe from the lower side of the inner pipe 12, is cooled by evaporation with a water film on the pipe wall, and finally, the wet air is discharged from the upper end of the outer pipe 11 and is discharged from the secondary air outlet 8. If water drops exist in the heat exchange tube, the water drops fall into the lower water tank 20 to circulate water.

It will be appreciated by persons skilled in the art that the scope of the utility model referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the utility model. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims

1. The sleeve type indirect evaporative cooling air conditioner is characterized by comprising an upper box body, a main box body (3) and a lower box body (4) which are sequentially arranged up and down, wherein a baffle (10) is arranged between the upper end and the lower end of the main box body (3) and the upper box body and between the upper end and the lower end of the main box body and the lower box body respectively;

a heat exchange tube is arranged in the main box body (3), the upper end of the heat exchange tube extends to the upper box body, and the lower end of the heat exchange tube extends to the lower box body (4); a primary air inlet (5) is arranged above one side wall of the main box body (3), and a primary air outlet (6) is arranged below the opposite side wall;

a secondary air inlet (7) and a secondary air outlet (8) are arranged on the body wall of the upper box body, and secondary air flows into the heat exchange tube from the secondary air inlet (7), flows out of the heat exchange tube and is discharged from the secondary air outlet (8);

the upper box body is internally provided with a water distribution device for distributing water to the heat exchange tubes, the lower box body (4) is internally provided with a water tank (20), and the water tank (20) is communicated with the water distribution device through a circulating water tube (19).

2. A telescopic indirect evaporative cooling air conditioner according to claim 1, wherein the upper box comprises a first upper box (1) and a second upper box (2) which are arranged up and down, and the first upper box (1) and the second upper box (2) are separated by a partition plate (9); the secondary air inlet (7) is positioned on the wall of the first upper box body (1), and the secondary air outlet (8) is positioned on the wall of the second upper box body (2).

3. A double pipe indirect evaporative cooling air conditioner according to claim 2, wherein the heat exchange pipe comprises an outer pipe (11) and an inner pipe (12), the upper and lower ends of the outer pipe (11) extend from the baffle plate (10) respectively, the upper end of the inner pipe (12) extends from the baffle plate (9), and the lower end extends from the baffle plate (10) below; the upper end and the lower end of the inner tube (12) and the outer tube (11) are both open ends.

4. A telescopic indirect evaporative cooling air conditioner according to claim 3, wherein the water distribution device comprises a water distribution pipe and an overflow disc, one end of the water distribution pipe is communicated with the circulating water pipe (19), and the other end of the water distribution pipe is used for conveying water into the overflow disc; the water in the overflow disc can be led into the cavity between the inner pipe and the outer pipe through the water diversion rope (17), and a water film is formed on the pipe wall.

5. The sleeve-type indirect evaporative cooling air conditioner according to claim 4, wherein the overflow disc comprises an outer tube overflow disc (15) and an inner tube overflow disc (16), the outer tube overflow disc (15) is positioned at the upper end of the outer tube, and the inner tube overflow disc (16) is positioned above the outer tube overflow disc (15) and on the outer body wall of the inner tube; the outer pipe overflow disc (15) and the inner pipe overflow disc (16) are used for respectively leading water to the inner pipe wall and the outer pipe wall of the outer pipe through water leading ropes (17).

6. A telescopic indirect evaporative cooling air conditioner according to claim 5, wherein the water distribution pipe comprises an outer pipe water distribution pipe (13) and an inner pipe water distribution pipe (14), the outer pipe water distribution pipe (13) transmits water to an outer pipe overflow disc (15), and the inner pipe water distribution pipe (14) transmits water to an inner pipe overflow disc (16).

7. A telescopic indirect evaporative cooling air conditioner according to claim 5, wherein the inner wall of the outer tube (11) and the outer wall of the portion of the inner tube (12) below the inner tube overflow pan (16) are each provided with micro channels (18), and the water diversion rope (17) is fixed in the micro channels (18).

8. A telescopic indirect evaporative cooling air conditioner according to claim 1, wherein a plurality of baffle plates (21) are arranged in the main box body (3) and positioned outside the heat exchange tubes, and the baffle plates (21) are arranged in a staggered manner, so that zigzag circulation channels of primary air are formed.