CN111457756A - Open cooling tower and cooling device - Google Patents

Abstract

The invention relates to the technical field of cooling equipment, and provides an open cooling tower and a cooling device. The open cooling tower comprises: a shell; a heat exchanger, which is arranged in the shell, with a liquid inlet at one end and a liquid outlet at the other end; a filler, arranged in the shell and below the heat exchanger , for cooling the liquid flowing out of the liquid outlet. In this open cooling tower, a heat exchanger is arranged in the shell, and the heat exchanger is located above the packing, so that the liquid in the heat exchanger can fully exchange heat with the air outside the heat exchanger, and the heat exchanger and The filler achieves secondary cooling to ensure the cooling effect of the open cooling tower. Especially in winter, the temperature of the outdoor air itself is low, and the setting of the heat exchanger can increase the heat exchange area between the outdoor air and the liquid, and improve the overall energy efficiency of the open cooling tower.

Description

Open cooling tower and cooling device

technical field

The invention relates to the technical field of cooling equipment, in particular to an open cooling tower and a cooling device.

Background technique

Direct evaporative cooling refers to the direct contact between air and water in a large area. Due to the evaporation of water, the temperature of both air and water is lowered. During this process, the moisture content of the air increases, and the sensible heat of the air is converted into latent heat, which is a Adiabatic humidification process. The heat of the medium in the coil is removed by the heat and moisture exchange between water and air, and the heat transfer process includes sensible heat transfer and latent heat transfer. The use of direct evaporative cooling technology to cool high-temperature water is of great significance for reducing the energy consumption of air conditioning systems and saving energy. The problem of the existing direct evaporative cooling technology is that it cannot make full use of natural energy for cooling.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

One of the objectives of the present invention is to provide an open cooling tower and a cooling device to solve the problem in the prior art that natural energy cannot be fully utilized for cooling.

In order to achieve this purpose, the present invention provides an open cooling tower, comprising:

case;

a heat exchanger, arranged in the shell, with a liquid inlet at one end and a liquid outlet at the other end;

The packing is arranged in the shell and below the heat exchanger, and is used for cooling the liquid flowing out from the liquid outlet.

In one embodiment, it also includes:

a water distributor, which is arranged in the casing and is located between the heat exchanger and the packing, the water distributor communicates with the liquid outlet, and arranges the liquid flowing out of the liquid outlet in the the filler.

In one embodiment, it also includes:

a first pipeline, connecting the heat exchanger and the water distributor;

a second pipeline for connecting the heat exchanger with an external return pipe;

The first pipeline and the second pipeline are alternately connected.

In one embodiment, the common end of the first pipeline and the second pipeline is provided with a three-way valve, or,

The first pipeline is provided with a first on-off valve, the second pipeline is provided with a second on-off valve, and the first on-off valve and the second on-off valve are selectively opened.

In one embodiment, the housing is provided with an air inlet at a position below the filler, the housing is provided with an air outlet above the heat exchanger, and a fan is provided at the air outlet.

In one embodiment, a liquid collection cavity is formed at the bottom of the housing, the liquid collection cavity is located below the air inlet, and the liquid collection cavity is connected to an external liquid return pipe.

In one embodiment, the heat exchanger is a finned tube heat exchanger.

In order to achieve this purpose, the present invention provides a cooling device including the above-mentioned open cooling tower.

The technical solution of the present invention has the following advantages: in the open cooling tower of the present invention, the heat exchanger is arranged in the shell, and the heat exchanger is located above the packing, so that the liquid in the heat exchanger can be connected with the air outside the heat exchanger. Full heat exchange is carried out, and the heat exchanger and filler achieve secondary cooling to ensure the cooling effect of the open cooling tower. Especially in winter, the temperature of the outdoor air itself is low, and the setting of the heat exchanger can increase the heat exchange area between the outdoor air and the liquid, and improve the overall energy efficiency of the open cooling tower.

In addition to the technical problems solved by the present invention described above, the technical features of the constituted technical solutions, and the advantages brought by the technical features of these technical solutions, other technical features of the present invention and the advantages brought by these technical features, Further description will be made in conjunction with the accompanying drawings.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

Fig. 1 is the structural representation of the open cooling tower of the embodiment of the present invention;

In the figure: 1: Air outlet; 2: Fan; 3: Heat exchanger; 4: Shell; 5: Water distributor; 6: Packing; 7: Air inlet; 8: Liquid return pipe; 9: First switch valve ; 10: Second on-off valve; 11: Inlet pipe.

Detailed ways

The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., means a specific feature described in connection with the embodiment or example, A structure, material, or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection. Ground connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance. Moreover, in the description of the present invention, unless otherwise specified, "multiple", "multiple" and "multiple groups" mean two or more, "several", "several", "several" Group" means one or more than one.

Referring to FIG. 1 , an open cooling tower according to an embodiment of the present invention includes a shell 4 , a heat exchanger 3 and a packing 6 . Among them, the heat exchanger 3 is arranged in the casing 4, with a liquid inlet at one end and a liquid outlet at the other end; the packing 6 is arranged in the casing 4 and below the water distributor 5, and is used for cooling from the liquid outlet outflow of liquid.

In this kind of open cooling tower, the heat exchanger 3 is arranged in the shell 4, and the heat exchanger 3 is located above the packing 6, so that the liquid in the heat exchanger 3 can be fully exchanged with the air outside the heat exchanger 3. heat, and the heat exchanger 3 and the filler 6 achieve secondary cooling to ensure the cooling effect of the open cooling tower. Especially in winter, the temperature of the outdoor air itself is relatively low, the arrangement of the heat exchanger 3 can increase the heat exchange area between the outdoor air and the liquid, and improve the overall energy efficiency of the open cooling tower.

In one embodiment, the open cooling tower further comprises:

The water distributor 5 is arranged in the casing 4 and is located between the heat exchanger 3 and the packing 6, the water distributor 5 is connected to the liquid outlet, and connects the liquid outlet The outflowing liquid is arranged on the packing 6 .

The arrangement of the water distributor 5 can ensure that the liquid flowing out of the heat exchanger 3 can be arranged on the packing 6 more uniformly. The specific structural form of the water distributor 5 is not limited, as long as the water volume can be arranged according to a certain rule on a certain working area. Specifically, the corresponding water distributor 5 can be selected based on the shape of the filler 6 . For example, the cross section of the packing 6 is rectangular, and the pipe sections of the packing 6 can be arranged corresponding to the side length and diagonal of the rectangle. For another example, the cross section of the packing 6 is circular, and the pipe sections of the packing 6 can be provided with a plurality of different diameters corresponding to the circle.

In one embodiment, the open cooling tower further comprises:

The first pipeline connects the heat exchanger 3 and the water distributor 5;

The second pipeline is used to communicate the heat exchanger 3 with the external return pipe 8;

The first pipeline and the second pipeline are alternately connected.

Through the arrangement of the first pipeline and the second pipeline, the open cooling tower has two working modes. In the first mode: the first pipeline is turned on, the second pipeline is disconnected, and then the liquid entering the open cooling tower passes through the heat exchanger 3, the water distributor 5 and the filler 6 successively. In the second mode: the first pipeline is disconnected, the second pipeline is connected, and then the liquid entering the open cooling tower is discharged to the outside of the open cooling tower after passing through the heat exchanger 3.

For an open cooling tower, it includes an external liquid inlet pipe 11 and a liquid return pipe 8 . Among them, the liquid inlet pipe 11 is used to pass the heated liquid into the open cooling tower for cooling tower, and the liquid return pipe 8 is used to pass the cooled liquid to the cooling demand end for cooling. As for the heat exchanger 3 , the liquid inlet is connected to the liquid inlet pipe 11 , and the liquid outlet is connected to the liquid return pipe 8 .

In one embodiment, a common end of the first pipeline and the second pipeline is provided with a three-way valve. Furthermore, by controlling the three-way valve, the on-off of the first pipeline and the second pipeline can be controlled. In addition to the three-way valve, an on-off valve can also be provided in the first pipeline and the second pipeline respectively to achieve the same control purpose. Specifically, a first on-off valve 9 is provided on the first pipeline, and a second on-off valve 10 is provided on the second pipeline, and one of the first on-off valve 9 and the second on-off valve 10 is opened.

When the first on-off valve 9 is opened and the second on-off valve 10 is off, the liquid outlet of the heat exchanger 3 is connected to the liquid return pipe 8 through the water distributor 5 and the packing 6 in turn. When the first switch valve 9 is disconnected and the second switch valve 10 is opened, the liquid outlet of the heat exchanger 3 is connected to the liquid return pipe 8 without passing through the water distributor 5 and the packing 6 .

In one embodiment, the casing 4 is provided with an air inlet 7 at a position below the filler 6 , and the casing 4 is provided with an air outlet 1 above the heat exchanger 3 , and the air outlet 1 is located at the position. A fan 2 is provided. In this case, the air inlet 7 enters through the underside of the filler 6, and heat exchange occurs at the filler 6 with the high-temperature liquid (here, the liquid is mostly water), and the obtained high-temperature air is discharged from the housing 4 through the air outlet 1.

Wherein, the air inlets 7 can be distributed around the casing 4 , thereby ensuring the ventilation volume inside the casing 4 . In addition, in addition to disposing the fan 2 at the air outlet 1, an additional fan 2 can be additionally arranged in the air flow path between the air inlet 7 and the air outlet 1 in the housing 4, thereby forming a secondary air intake between the two fans 2 , to enhance the airflow capacity in the housing 4 .

In one embodiment, a liquid collection cavity is formed at the bottom of the housing 4 , the liquid collection cavity is located below the air inlet 7 , and the liquid collection cavity is connected to an external liquid return pipe 8 . Wherein, the air inlet 7 can be made as close to the liquid collecting chamber as possible, so that the liquid in the liquid collecting chamber can exchange heat with the low-temperature air at the air inlet 7 .

In one embodiment, an air deflector may be provided at the air inlet 7, the air deflector guides the air to the liquid collection chamber, so that the low-temperature air entering through the air inlet 7 exchanges heat with the liquid at the liquid collection chamber.

In one embodiment, the heat exchanger 3 is a finned tube heat exchanger 3 to ensure heat exchange efficiency. Of course, the specific form of the heat exchanger 3 is not limited. For example, the heat exchanger 3 can also be a plate heat exchanger 3 , or can also be a tube plate heat exchanger 3 .

Refrigeration is carried out by the open cooling tower of Figure 1, and its working principle is as follows:

In summer, close the second on-off valve 10 and open the first on-off valve 9, the hot water first exchanges heat indirectly with the low-temperature and high-humidity air in the fin-tube heat exchanger 3, the hot water temperature decreases, the air temperature increases and the The shell 4 of the open cooling tower is discharged; the cooled hot water enters the water distributor 5 and is sprayed on the lower filler 6 . The outdoor air enters the shell 4 from the lower air inlet 7, flows upward through the filler 6, and conducts countercurrent heat and moisture transfer heat exchange with the water arranged in the water distributor 5 in the filler 6, and the air reaches the finned tube heat exchanger 3 after cooling and humidifying. Position; the air after cooling and humidification also cools the water in the water distributor 5 when it passes through the water distributor 5 .

The open cooling tower can make full use of outdoor air in summer to achieve pre-cooling of hot water and secondary cooling by evaporative cooling.

In winter, open the second on-off valve 10 and close the first on-off valve 9, the hot water is indirectly heat-exchanged with the outdoor air in the finned tube heat exchanger 3, and the cooled hot water is directly discharged from the shell through the second pipeline. Body 4, without passing through the water distributor 5.

The open cooling tower can use outdoor air to cool the hot water in winter.

To sum up, this kind of open cooling tower can make full use of the outdoor air energy and realize the cooling and cooling of hot water throughout the year.

According to an embodiment of the present invention, a cooling device is also provided, including the above-mentioned open cooling tower. In addition, the cooling device often includes components such as a compressor, an evaporator, and a throttling device. These components can be connected with the above-mentioned open cooling tower to form a refrigeration circuit, and the end of the refrigeration demand can be refrigerated through the refrigeration circuit.

The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications or equivalent replacements to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should cover within the scope of the claims of the present invention.

Claims (8)

1. an open cooling tower, is characterized in that, comprises: case; a heat exchanger, arranged in the shell, with a liquid inlet at one end and a liquid outlet at the other end; The packing is arranged in the shell and below the heat exchanger, and is used for cooling the liquid flowing out from the liquid outlet. 2. open cooling tower according to claim 1, is characterized in that, also comprises: a water distributor, which is arranged in the casing and is located between the heat exchanger and the packing, the water distributor communicates with the liquid outlet, and arranges the liquid flowing out of the liquid outlet in the the filler. 3. open cooling tower according to claim 2, is characterized in that, also comprises: a first pipeline, connecting the heat exchanger and the water distributor; a second pipeline for connecting the heat exchanger with an external return pipe; The first pipeline and the second pipeline are alternately connected. 4. The open cooling tower according to claim 3, wherein the common end of the first pipeline and the second pipeline is provided with a three-way valve, or, The first pipeline is provided with a first on-off valve, the second pipeline is provided with a second on-off valve, and the first on-off valve and the second on-off valve are selectively opened. 5. The open cooling tower according to any one of claims 1 to 4, wherein the casing is provided with an air inlet at a position below the filler, and the casing is located above the heat exchanger An air outlet is provided, and a fan is arranged at the air outlet. 6 . The open cooling tower according to claim 5 , wherein a liquid collection cavity is formed at the bottom of the shell, the liquid collection cavity is located below the air inlet, and the liquid collection cavity is connected to an external return. 7 . liquid pipe. 7 . The open cooling tower according to claim 1 , wherein the heat exchanger is a fin-tube heat exchanger. 8 . 8. A cooling device, characterized in that it comprises the open cooling tower according to any one of claims 1 to 7.

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