CN115979042A - Heat exchanger - Google Patents

Abstract

The invention discloses a heat exchange device which is characterized by comprising a first heat exchanger and a second heat exchanger, wherein at least one of the first heat exchanger and the second heat exchanger is provided with a closable spray device, an air outlet of the first heat exchanger is connected with an air inlet of the second heat exchanger, and a closable atomization device is arranged at the air inlet of the first heat exchanger. In this heat transfer device, set up spray set and atomizing device simultaneously to make can be according to the difference of cooling power, select different cooling methods, the whole life-span of extension that can be better. And the air intake of first heat exchanger is provided with atomizing device to make the atomizing granule can be after first heat exchanger evaporation heat transfer, and the atomizing granule of abundant heat transfer can enter into the second heat exchanger and carry out abundant heat transfer, can further improve radiating efficiency, increase of service life. In conclusion, the heat exchange device can effectively solve the problem that the service life of the heat exchange device is not long.

Description

a heat exchange device

technical field

The invention relates to the technical field of heat exchange, and more specifically, relates to a heat exchange device.

Background technique

At present, in the prior art, a dry heat exchanger and a plate-shaped wet heat exchanger are used together. For example, the Chinese patent application number 201180044407.9 discloses a hybrid heat exchange device and a method of operating the device, wherein the hybrid heat exchanger The heat exchange equipment and the method of operating the equipment are provided with two plate-shaped wet heat exchangers, and the water spray equipment of one of the plate-shaped wet heat exchangers can be selected to be turned on or off, so that when it is closed, it can be used as a dry heat exchanger In use, when the heat exchanger is used as a dry type and a wet type, it will be mutually constrained, so that when used as a dry type, it cannot achieve better results than a simple dry type wet cooler. However, in actual use, pure wet cooling or dry cooling cannot achieve finer adjustment of cooling efficiency, which will increase the service life, such as wet cooling may be overused.

To sum up, how to effectively solve the problem of short service life of the heat exchange device is an urgent problem for those skilled in the art.

Contents of the invention

In view of this, the object of the present invention is to provide a heat exchange device, which can effectively solve the problem of short service life of the heat exchange device.

In order to achieve the above object, the present invention provides the following technical solutions:

A heat exchange device, characterized in that it includes a first heat exchanger and a second heat exchanger, at least one of the first heat exchanger and the second heat exchanger has a closeable spray device, the The air outlet of the first heat exchanger is connected with the air inlet of the second heat exchanger, and the air inlet of the first heat exchanger is provided with a closable atomizing device.

In this heat exchange device, when in use, the spraying device or the atomizing device can be turned on according to the cooling power requirements of the cooling object. Cold, the air body passes through two heat exchangers in turn to make full use of the air body for cooling. When the cooling power requirement increases, the air cooling can no longer be satisfied. At this time, the atomization device can be turned on. The atomized particles of the atomization device are evaporated and exchanged at the first heat exchanger, and the atomized particles that are not fully heat-exchanged can enter To the second heat exchanger for evaporative heat exchange. When the cooling power requirement is further increased, the atomization cooling can no longer be satisfied, and the spray device can be further opened. In the heat exchange device, a spray device and an atomization device are provided at the same time, so that different cooling methods can be selected according to different cooling powers, and the overall life can be better extended. Moreover, the air inlet of the first heat exchanger is provided with an atomizing device, so that the atomized particles can be evaporated and exchanged in the first heat exchanger, while the atomized particles that have not fully exchanged heat can enter the second heat exchanger Sufficient heat exchange in the middle can further improve the heat dissipation efficiency and prolong the service life. To sum up, the heat exchange device can effectively solve the problem of short service life of the heat exchange device.

Preferably, the spray device is only provided at the first heat exchanger among the first heat exchanger and the second heat exchanger, and the second heat exchanger is a dry heat exchanger .

Preferably, the atomization device is an atomization nozzle device and/or a wet film humidification device.

Preferably, the first heat exchanger and the second heat exchanger are arranged side by side in the horizontal direction.

Preferably, the air outlet of the second heat exchanger is provided with an exhaust fan.

Preferably, a water baffle is provided between the first heat exchanger and the second heat exchanger.

Preferably, the first heat exchanger is a bare tube heat exchanger, and the second heat exchanger is a plate-fin heat exchanger.

Preferably, the spraying device is only provided at the second heat exchanger among the first heat exchanger and the second heat exchanger.

Preferably, the heat exchange channels of the first heat exchanger and the heat exchange channels of the second heat exchanger are connected in series or in parallel.

Preferably, the inlet of the heat exchange channel of the first heat exchanger communicates with the outlet of the heat exchange channel of the second heat exchanger.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of a heat exchange device provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of another heat exchange device provided by an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of another heat exchange device provided by an embodiment of the present invention.

The markings in the attached drawings are as follows:

A first heat exchanger 1 , a second heat exchanger 2 , a spray device 3 , an atomizing device 4 , and an exhaust fan 5 .

Detailed ways

The embodiment of the invention discloses a heat exchange device to effectively solve the problem that the service life of the heat exchange device is not long.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-3, Figure 1 is a schematic structural view of a heat exchange device provided by an embodiment of the present invention; Figure 2 is a schematic structural view of another heat exchange device provided by an embodiment of the present invention; Figure 3 is a schematic structural view of an embodiment of the present invention A structural schematic diagram of another heat exchange device is provided.

In a specific embodiment, this embodiment provides a heat exchange device, specifically, the heat exchange device includes a plurality of heat exchangers, which may be two, three or more than four heat exchangers. For the convenience of description, the two heat exchangers may be the first heat exchanger 1 and the second heat exchanger 2 respectively.

And the air outlet of the first heat exchanger 1 is connected with the air inlet of the second heat exchanger 2, so that the ventilation channels of the first heat exchanger 1 and the ventilation channels of the second heat exchanger 2 are connected in series. It should be noted that the series connection here may only be a use state of the heat exchange device, and may also have other use states, such as in another use state, the ventilation channel of the first heat exchanger 1 and the first heat exchanger 1 The ventilation passages of the two heat exchangers 2 are connected in parallel.

The air outlet of the first heat exchanger 1 is connected to the air inlet of the second heat exchanger 2, so that with the help of the air generating device, the air first passes through the first heat exchanger 1, and then penetrates into the In the second heat exchanger 2. Generally speaking, the ambient air enters the first heat exchanger 1 , then enters the second heat exchanger 2 , and then flows into the environment from the air outlet of the second heat exchanger 2 .

At least one of the first heat exchanger 1 and the second heat exchanger 2 has a spray device 3, that is, the first heat exchanger 1 and/or the second heat exchanger 2 has a spray device 3, and the spray device 3 that has The heat exchanger is a wet heat exchanger, and its specific structure can refer to the spray wet heat exchanger in the prior art. Wherein the spray device 3 that can be closed means that the spray device 3 can have two kinds of use states, one use state is that the spray device 3 is opened to cool the spray, and the other use state is that the spray device 3 Closed for air cooling or other cooling only.

Wherein the air inlet of the first heat exchanger 1 is provided with an atomizing device 4 to form atomized liquid particles at the air inlet of the first heat exchanger 1, and the atomized liquid particles follow the air body into the first heat exchanger. In the heat exchanger 1, the evaporation heat exchange is performed in the first heat exchanger 1, and the liquid particles that have not undergone evaporation heat exchange follow the air body into the second heat exchanger 2, and continue to evaporate in the second heat exchanger 2 To dissipate heat, air cooling can be carried out in the second heat exchanger 2 simultaneously. Wherein the atomization device 4 that can be closed means that the atomization device 4 can have two kinds of use states, one use state is that the spray device 3 is opened to cool the spray, and the other use state is that the spray device 3 Closed for air cooling or other cooling only. It should be noted that the spraying device 3, the atomizing device 4 and the air generating device can be opened and closed independently. Generally speaking, the spraying device 3 and the atomizing device 4 are not turned on at the same time, but one of them can be turned on independently, or both can be turned off. Wherein the air generating device can be opened independently, and also can be opened simultaneously with any one of the spraying device 3 and the atomizing device 4 .

In the heat exchange device, when in use, the spray device 3 or the atomization device 4 can be turned on according to the cooling power requirements of the cooling object, and the atomization device 4 and the spray device 3 can be turned off at the same time under lower cooling power , only air cooling is performed, and the air body passes through two heat exchangers in sequence to make full use of the air body for cooling. When the cooling power requirement increases, the air cooling can no longer be satisfied. At this time, the atomization device 4 can be turned on, and the atomized particles of the atomization device 4 undergo evaporation and heat exchange at the first heat exchanger 1, and the atomization without sufficient heat exchange The particles can enter the second heat exchanger 2 for evaporation and heat exchange. When the cooling power requirement is further increased, the atomization cooling can no longer be satisfied, and the spray device 3 can be further opened. In the heat exchange device, the spraying device 3 and the atomizing device 4 are provided at the same time, so that different cooling methods can be selected according to different cooling powers, and the overall service life can be better extended. Moreover, the air inlet of the first heat exchanger 1 is provided with an atomizing device 4, so that the atomized particles can be evaporated and exchanged in the first heat exchanger 1, and the atomized particles that have not fully exchanged heat can enter the second heat exchanger. Sufficient heat exchange in the heat exchanger 2 can further improve heat dissipation efficiency and prolong service life. To sum up, the heat exchange device can effectively solve the problem of short service life of the heat exchange device.

Wherein at least one of the first heat exchanger 1 and the second heat exchanger 2 has a spray device 3 that can be closed, it may be that the first heat exchanger 1 is provided with a spray device 3 while the second heat exchanger 2 is not provided The above-mentioned spraying device 3 . It is also possible that the second heat exchanger 2 is provided with a spray device 3 , while the first heat exchanger 1 is not provided with the above-mentioned spray device 3 .

In some embodiments, one of the first heat exchanger 1 and the second heat exchanger 2 can be a wet heat exchanger with a spray device 3 , and the other can be a dry heat exchanger. Among them, the dry heat exchanger has a larger heat dissipation area than the wet heat exchanger with the spray device 3, and generally more fins are provided in the dry heat exchanger to fully contact the air body, and then Ensure sufficient heat exchange with the wind body, such as plate-fin heat exchangers, plate-fin heat exchangers can be fin-tube heat exchangers, plate heat exchangers. The wet heat exchanger is generally a bare tube heat exchanger, that is, it only has pipes, and the liquid falls on the outer surface of the pipes for evaporation and heat exchange to avoid hindering the flow of liquid. Of course, the wet heat exchanger can also be a non-light tube heat exchanger, that is, a small number of fins can be provided, as long as the flow of the liquid is not hindered. One of them is a dry heat exchanger, which can well realize air cooling, thereby reducing the opening time of the spraying device 3 and the atomizing device 4, so as to further prolong the service life.

In some embodiments, as shown in FIG. 1 , the first heat exchanger 1 and the second heat exchanger 2 can be provided with the spray device 3 only at the first heat exchanger 1 , at this time the second heat exchanger 2 is a dry heat exchanger. At this time, an atomizing device 4 is provided at the air inlet of the first heat exchanger 1 . When the atomizing device 4 is turned on, the spray device 3 can be turned off. Then the liquid particles atomized by the atomizing device 4 follow the air body into the first heat exchanger 1, evaporate and exchange heat, and when some liquid particles have not yet evaporated, they flow out from the air outlet of the first heat exchanger 1 into the In the second heat exchanger 2, the content of liquid particles has been significantly reduced at this time. Although the second heat exchanger 2 is a dry heat exchanger, it will not have an excessive impact on the flow of liquid particles. On the contrary, a small amount of The liquid particles can continue to evaporate and exchange heat in the second heat exchanger 2, which can increase the heat exchange efficiency of the second heat exchanger 2, thereby prolonging the service life of the entire heat exchange device as a whole.

In some embodiments, the atomizing device 4 refers to a device capable of atomizing liquid. Generally, there are two forms: one form, as shown in Figure 1, is an atomizing nozzle device, using an atomizing nozzle, when the water flow passes through the atomizing nozzle, it is not sprayed out, but emitted in the form of mist. In the atomized state, the content of liquid particles in the air body is very high; another form is, as shown in Figure 2, the wet film humidification device uses a wet film, and when the air body passes through the wet film, it will carry liquid to form Granular liquid, a large amount of granular liquid forms an atomized state in the air body.

In some embodiments, as shown in Figures 1, 2, and 3, the first heat exchanger 1 and the second heat exchanger can be arranged side by side in the horizontal direction to facilitate the atomization through the first heat exchanger 1 Particles can enter the second heat exchanger 2 more conveniently, so as to ensure the heat exchanger efficiency of the second heat exchanger 2 .

Of course, the first heat exchanger 1 and the second heat exchanger 2 can also be arranged up and down. For example, the second heat exchanger 2 is arranged directly above the first heat exchanger 1. At this time, the second heat exchanger 2 is preferably dry. heat exchanger, and a spray device 3 is arranged between the first heat exchanger 1 and the second heat exchanger 2 .

In some embodiments, the air generating device may be the exhaust fan 5 or the air supply fan. For example, the air outlet of the second heat exchanger 2 may be provided with an exhaust fan 5 and/or the air inlet of a single heat exchanger may be provided with a blower fan. Generally speaking, as shown in Figures 1-3, it is only necessary to install an exhaust fan 5 at the air outlet of the second heat exchanger 2, so as to keep the air body away from the liquid and improve the service life of the fan.

In some embodiments, a water barrier may be provided between the first heat exchanger 1 and the second heat exchanger 2 . Especially when the first heat exchanger 1 has a spraying device 3 and the second heat exchanger 2 is a dry heat exchanger, avoid a large amount of water from entering the second heat exchanger 2 and affect the service life of the second heat exchanger 2 . The water baffle is generally a wind deflector to change the wind direction, and the large liquid particles will follow the wind body and hit the water baffle, and then follow the water baffle to flow under the action of gravity to separate from the wind body. Of course, the number of water baffles can be selected according to the number of liquid particles received by the second heat exchanger 2, so as to select the amount of water to be blocked. Generally, the above-mentioned water baffle is arranged at the air outlet of the first heat exchanger 1 .

In some embodiments, as shown in FIG. 3 , the spraying device 3 can be provided only at the second heat exchanger 2 in the first heat exchanger 1 and the second heat exchanger 2 , and the air inlet of the first heat exchanger 1 is provided with an atomizing device 4, at this time the second heat exchanger 2 is equivalent to a spray heat exchanger, and the first heat exchanger 1 is equivalent to an atomizing heat exchanger. Generally speaking, the heat exchange area of the spray heat exchanger is larger than that of the spray heat exchanger, that is, the spray heat exchanger can have a small number of fins to increase the contact area with the air body, and then fully contact the liquid particles in the air body.

In the heat exchange device, the spray device 3 and the atomizing device 4 can be turned on simultaneously. In order to further ensure the heat exchange efficiency and prolong the service life. When in use, the spray device, the spray device 3 can be turned on separately, and the spray device 3 and the atomizing device 4 can be turned on simultaneously. When the spraying device 3 and the atomizing device 4 are turned on at the same time, the atomized particles are evaporated at the first heat exchanger 1 , and the air volume is increased, so that the air body at the spraying device 3 can be pushed out better.

In some embodiments, the heat exchange channels of the first heat exchanger 1 and the heat exchange channels of the second heat exchanger 2 can be connected in series or in parallel. When connected in parallel, the high-heat fluid flows out from the heat source, part of it enters the heat exchange channel of the first heat exchanger 1, and the other part enters the heat exchange channel of the second heat exchanger 2, respectively in the first heat exchanger 1 and the second heat exchange channel. After exchanging heat at 2 places of the second heat exchanger, it flows out of the heat exchange device again. It should be noted that the fluid flowing in the heat exchange channel is generally a fluid capable of heat exchange, which may be Freon, water, or other fluids.

When connected in series, the inlet of the heat exchange channel of the second heat exchanger 2 may communicate with the outlet of the heat exchange channel of the first heat exchanger 1, so that it passes through the first heat exchanger 1 first, and then passes through the second heat exchange channel. Heater 2.

As shown in accompanying drawing 1, the inlet of the heat exchange channel of the preferred first heat exchanger 1 is communicated with the outlet of the heat exchange channel of the second heat exchanger 2 here, so that it passes through the second heat exchanger 2 first, and then passes through First heat exchanger 1. For example, when the second heat exchanger 2 is a dry heat exchanger, the second heat exchanger 2 is mainly air-cooled, then when the high-heat refrigerant passes through the second heat exchanger 2, it is firstly air-cooled to reduce the temperature of the heat exchange channel. The medium refrigerant temperature is lowered, and then flows to the first heat exchanger 1 for evaporative cooling, which can reduce the amount of liquid evaporation and prolong the service life of the first heat exchanger 1 .

As in accompanying drawing 3, here can be that the inlet of the heat exchange channel of the second heat exchanger 2 communicates with the outlet of the heat exchange channel of the first heat exchanger 1, at this moment, air cooling and cooling are performed at the first heat exchanger 1. There are two forms of evaporative cooling, and evaporative cooling is mainly performed at the second heat exchanger 2 to reduce the evaporation amount of evaporative cooling, thereby prolonging the service life.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A heat exchange device, characterized in that it comprises a first heat exchanger and a second heat exchanger, at least one of the first heat exchanger and the second heat exchanger has a spray device that can be closed , the air outlet of the first heat exchanger is connected to the air inlet of the second heat exchanger, and the air inlet of the first heat exchanger is provided with a closable atomizing device. 2. The heat exchange device according to claim 1, wherein the spraying device is only provided at the first heat exchanger among the first heat exchanger and the second heat exchanger , the second heat exchanger is a dry heat exchanger. 3. The heat exchange device according to claim 2, wherein the atomization device is an atomization spray head device and/or a wet film humidification device. 4. The heat exchange device according to claim 3, wherein the first heat exchanger and the second heat exchanger are arranged side by side in a horizontal direction. 5. The heat exchange device according to claim 4, characterized in that, the air outlet of the second heat exchanger is provided with an exhaust fan. 6. The heat exchange device according to claim 5, characterized in that, a water baffle is provided between the first heat exchanger and the second heat exchanger. 7. The heat exchange device according to claim 6, wherein the first heat exchanger is a bare tube heat exchanger, and the second heat exchanger is a plate-fin heat exchanger. 8. The heat exchange device according to claim 1, characterized in that, the spray device is only provided at the second heat exchanger among the first heat exchanger and the second heat exchanger . 9. The heat exchange device according to any one of claims 1-8, characterized in that, the heat exchange channels of the first heat exchanger and the heat exchange channels of the second heat exchanger are connected in series or in parallel. 10. The heat exchange device according to claim 9, wherein the inlet of the heat exchange channel of the first heat exchanger communicates with the outlet of the heat exchange channel of the second heat exchanger.

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