Dry-wet combined heat exchange device

Abstract

A dry-wet combined heat exchange device includes a rack, a plate-shaped dry heat exchanger and a plate-shaped wet heat exchanger. A placement cavity is formed in the rack. A first ventilation opening extends vertically through the top of the placement cavity, and a second ventilation opening extends horizontally through one or more sides of the placement cavity. The plate-shaped dry heat exchanger is obliquely arranged in the placement cavity to divide the placement cavity into an upper cavity and a lower cavity, and has an upper plate surface facing the first ventilation opening and a lower plate surface facing at least one second ventilation opening. The plate-shaped wet heat exchanger is disposed at and transverse to the first ventilation opening and / or at least one second ventilation opening.

Description

[0001] The present application is a national phase application of the international patent application PCT / CN2023 / 121034, filed on Sep. 25, 2023, which claims priority to Chinese Patent Application No. 202211435106.5, titled “DRY-WET COMBINED HEAT EXCHANGE DEVICE”, filed on Nov. 16, 2022 with the China National Intellectual Property Administration, which are incorporated herein by reference in their entireties.FIELD

[0002] The present application relates to the technical field of heat exchange and, in particular, to a dry-wet combined heat exchange device.BACKGROUND

[0003] In the conventional technology, a dry heat exchanger and a plate-shaped wet heat exchanger are combined for use together. For example, a hybrid heat exchanger device and a method for operating the same are disclosed in the Chinese Patent Application No. 201180044407.9, in which two plate-shaped wet heat exchangers are provided. A water spraying device of one of the plate-shaped wet heat exchangers may be selectively turned on or off. When turned off, this plate-shaped wet heat exchanger functions as a dry heat exchanger. When the heat exchanger is used as a combination of a dry heat exchanger and a wet heat exchanger, there may be constraints. When it functions as a dry heat exchanger, it fails to achieve better heat exchange effect compared with a dedicated dry heat exchanger.

[0004] For example, a dry-wet combined cooling tower control system and a method for operating the same are disclosed in a Chinese Patent Application No. 202111615972.8, in which a dry heat exchanger and a plate-shaped wet heat exchanger are provided and have pipelines connected in series to form a dry-wet combined heat exchanger. Thus, both the dry heat exchanger and the plate-shaped wet heat exchanger can play their optimal functions, and it is possible to avoid the problem of rapid scale formation caused by excessive operation pressure in the plate-shaped wet heat exchanger. However, this solution still does not achieve the best cooling effect.

[0005] For the above two kinds of heat exchange devices, a dry heat exchanger and a plate-shaped wet heat exchanger are both provided in the spatial structure where they are arranged in parallel in a vertical direction or a horizontal direction, resulting in a very large overall size and a very large footprint.

[0006] In summary, it is desired for those skilled in the art to effectively solve the problem of a large footprint of the dry-wet combined heat exchange device.SUMMARY

[0007] In view of this, a first object of the present application is to provide a dry-wet combined heat exchange device, which can effectively solve the problem a large footprint of the dry-wet combined heat exchange device.

[0008] In order to achieve the first object, the following technical solutions are proposed in the present application.

[0009] A dry-wet combined heat exchange device includes a rack, a plate-shaped dry heat exchanger and a plate-shaped wet heat exchanger. A placement chamber is formed inside the rack. A first ventilation opening is formed in and runs through the top of the placement chamber in a vertical direction, and a second ventilation opening is formed in and runs through one or more sides of the placement cavity in a horizontal direction. The plate-shaped dry heat exchanger is obliquely arranged in the placement chamber to divide the placement chamber into an upper chamber and a lower chamber, and has an upper plate surface facing the first ventilation opening, and a lower plate surface facing at least one second ventilation opening. The plate-shaped wet heat exchanger is arranged at the first ventilation opening and / or at least one second ventilation opening and extends in a transverse direction of the ventilation opening.

[0010] When the dry-wet combined heat exchange device is used, the plate-shaped dry heat exchanger is firstly placed obliquely so as to ensure that the plate-shaped dry heat exchanger can be maximized within a limited space and ensure the requirement for the ventilation area of the dry heat exchanger. The plate-shaped wet heat exchanger 3 is attached to the top wall or the side wall at the corresponding ventilation opening, so as to ensure the ventilation requirement and maximize the structure to ensure the cooling requirement. Meanwhile, arranging the plate-shaped dry condenser obliquely does not adversely affect the cooling effect, even can realize optimal cooling effect, and results in a compact overall structure. In summary, the dry-wet combined heat exchange device can effectively solve the problem of a large size of the conventional dry-wet combined heat exchange device.

[0011] In an embodiment, the second ventilation opening or each second ventilation opening is provided at a part of a vertical side wall of the placement chamber facing the lower plate surface of the plate-shaped dry heat exchanger in the horizontal direction.

[0012] In an embodiment, the plate-shaped wet heat exchanger or each plate-shaped wet heat exchanger is arranged at the second ventilation opening.

[0013] In an embodiment, at least one part of the side wall of the placement chamber is provided with a third ventilation opening that is in communication with the lower chamber; and the plate-shaped wet heat exchanger is arranged at the second ventilation opening in communication with the lower chamber.

[0014] In an embodiment, the plate-shaped wet heat exchanger is arranged at the second ventilation opening facing the lower plate surface of the plate-shaped dry heat exchanger in the horizontal direction; and the third ventilation opening is located in the vertical side wall of the placement chamber between the plate-shaped dry heat exchanger and the plate-shaped wet heat exchanger.

[0015] In an embodiment, a fan for accelerating flow of air is provided at at least one of the first ventilation opening, the second ventilation opening and the third ventilation opening.

[0016] In an embodiment, a door is provided at at least one of the first ventilation opening, the second ventilation opening and the third ventilation opening.

[0017] In an embodiment, a fan is provided at each of the first ventilation opening, the third ventilation opening, and the second ventilation opening in communication with the lower chamber. The fans are configured to be independently turned on and off. The fans are all configured to pump air to the outside, or are all configured to introduce air to the inside. A door is provided at each of the first ventilation opening, the third ventilation opening, and the second ventilation opening in communication with the lower chamber. The doors are configured to be independently opened and closed.

[0018] In an embodiment, a door with an adjustable opening is arranged at the third ventilation opening.

[0019] In an embodiment, two placement chambers are provided side by side inside the rack, and are communicated with each other. Two plate-shaped dry heat exchangers are obliquely placed in the two placement chambers, respectively, jointly forming a V-shaped structure with an upward opening. Parts of side walls of the two placement chambers that are far away from each other are each provided with the second ventilation opening and the plate-shaped wet heat exchanger

[0020] In an embodiment, a plurality of plate-shaped wet heat exchangers are sequentially arranged side by side in the vertical direction at the second ventilation opening.

[0021] In an embodiment, the plate-shaped wet heat exchangers are a wet-film heat exchanger, a spray heat exchanger or an atomization heat exchanger.

[0022] In an embodiment, at the second ventilation opening facing the lower plate surface of the plate-shaped dry heat exchanger in the horizontal direction, the plurality of plate-shaped wet heat exchangers are arranged sequentially and inwardly in the vertical direction.

[0023] In an embodiment, a lower end of the upper one of two adjacent plate-shaped wet heat exchangers is overlapped with an upper end of the lower one of the two adjacent plate-shaped wet heat exchangers in the vertical direction.

[0024] In an embodiment, the plurality of plate-shaped wet heat exchangers arranged side by side in the vertical direction are coupled in parallel.

[0025] In an embodiment, heat-conducting fluid channels in at least one of the plate-shaped wet heat exchangers are connected in series with heat-conducting fluid channels in the plate-shaped dry heat exchanger.

[0026] In an embodiment, the placement chamber is a square chamber or a cylindrical chamber.BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the conventional technology, the accompanying drawings required in the description of the embodiments or the conventional technology will be briefly described below. Obviously, the accompanying drawings in the following description merely relate to some embodiments of the present application, and other drawings may be obtained by those skilled in the art based on the provided accompanying drawings without any creative effort.

[0028] FIG. 1 is a schematic structural view of a dry-wet combined heat exchange device according to an embodiment of the present application;

[0029] FIG. 2 is a schematic structural view of another dry-wet combined heat exchange device according to an embodiment of the present application;

[0030] FIG. 3 is a schematic structural view of a back-to-back dry-wet combined heat exchange device according to an embodiment of the present application;

[0031] FIG. 4 is a schematic structural view of another dry-wet combined heat exchange device according to an embodiment of the present application; and

[0032] FIG. 5 is a schematic structural view showing details of a dry-wet combined heat exchange device according to an embodiment of the present application.LIST OF REFERENCE NUMERALS1.rack;2.plate-shaped dry heat exchanger;3.plate-shaped wet heat exchanger;4.placement chamber;5.fan;41.upper chamber;42.lower chamber;43.first ventilation opening;44.second ventilation opening;45.third ventilation opening.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] There is disclosed in the embodiments of the present application a dry-wet combined heat exchange device, which can effectively solve the problem that the dry-wet combined heat exchange device occupies a large space.

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some, not all, of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts will fall within the protection scope of the present application.

[0035] Referring to FIGS. 1 to 5, FIG. 1 is a schematic structural view of a dry-wet combined heat exchange device according to an embodiment of the present application; FIG. 2 is a schematic structural view of another dry-wet combined heat exchange device according to an embodiment of the present application; FIG. 3 is a schematic structural view of a back-to-back dry-wet combined heat exchange device according to an embodiment of the present application;

[0036] FIG. 4 is a schematic structural view of another dry-wet combined heat exchange device according to an embodiment of the present application; and FIG. 5 is a schematic structural view showing details of a dry-wet combined heat exchange device according to an embodiment of the present application.

[0037] In some embodiments, a dry-wet combined heat exchange device is provided. The dry-wet combined heat exchange device mainly includes a rack 1, a plate-shaped dry heat exchanger 2 and a plate-shaped wet heat exchanger 3. One or more plate-shaped dry heat exchanger 2 may be provided, and one or more plate-shaped wet heat exchanger 3 may be provided. Heat-conducting fluid channels in the plate-shaped wet heat exchanger 3 are connected in series or in parallel with heat-conducting fluid channels in the plate-shaped dry heat exchanger 2; or some of the heat-conducting fluid channels in the plate-shaped wet heat exchanger 3 are connected in series with some of heat-conducting fluid channels in the plate-shaped dry heat exchanger 2, and the other heat-conducting fluid channels in the plate-shaped wet heat exchanger 3 are connected in parallel with the other heat-conducting fluid channels in the plate-shaped dry heat exchanger 2. The plate-shaped dry heat exchanger 2 and the plate-shaped wet heat exchanger 3 may be a condenser or a cooler. For example, a refrigerant is circulated in the condenser and may undergo a phase change, and water is circulated in the cooler and may generally not undergo a phase change. The plate-shaped wet heat exchanger 3 and the plate-shaped dry heat exchanger 2 both refer to that the heat exchanger has a plate-like structure as a whole, through which air flows generally in a plate thickness direction, so that the heat exchanger is flat and thin. The plate-shaped wet heat exchanger 3 is a wet-film heat exchanger, a spray heat exchanger, an atomization heat exchanger, or any other heat exchanger. When multiple plate-shaped wet heat exchangers 3 are provided, they may differ in structure from one another. As shown, the plate-shaped wet heat exchanger 3 has a sprinkler head at the upper part, heat exchange pipelines at the middle part, and a water collection tank at the lower part.

[0038] A placement chamber 4 is formed inside the rack 1. The placement chamber 4 may be substantially square or cylindrical, for example, a square chamber, a cylindrical chamber, or the like. The placement chamber 4 mainly extends in a vertical direction. For ease of description, walls of the placement chamber 4 include a top wall, a bottom wall and a vertical side wall. The top wall and the bottom wall are oppositely arranged, and the side vertical walls are connected between the top wall and the bottom wall.

[0039] A first ventilation opening 43 is formed in and runs through the top wall of the placement chamber 4 in a vertical direction, and a second ventilation opening 44 is formed in and runs through the side wall(s) of the placement chamber in a horizontal direction. Generally speaking, one of the first ventilation opening 43 and the second ventilation opening 44 acts as an air inlet for introducing air into the placement chamber 4, and the other of the first ventilation opening 43 and the second ventilation opening 44 acts as an air outlet for discharging air out of the placement chamber 4. Alternatively, each of the first ventilation opening 43 and the second ventilation opening 44 acts as an air inlet or an air outlet, and an additional ventilation opening is provided to act as an air outlet or an air inlet correspondingly. The ventilation channels in the plate-shaped dry heat exchanger 2 may be connected in series or in parallel with the ventilation channels in the plate-shaped wet heat exchanger 3, which may be determined based on needs in practical application.

[0040] The first ventilation opening 43 extends vertically to discharge air in the vertical direction. Such a sentence as “the first ventilation opening 43 extends vertically” does not mean that the first ventilation opening extends in the perfectly vertical direction, in other words, the first ventilation opening 43 may be provided obliquely. The second ventilation opening 44 extends horizontally, which does not mean that the second ventilation opening extends in the perfectly horizontal direction, in other words, the second ventilation opening 44 may extend in a substantially horizontal direction.

[0041] The plate-shaped dry heat exchanger 2 is obliquely arranged in the placement chamber 4 to divide the placement chamber 4 into an upper chamber 41 and a lower chamber 42. The plate-shaped dry heat exchanger 2 has a plate-shaped structure as a whole. The plate-shaped dry heat exchanger 2 may be a plate heat exchanger, or a plate-fin heat exchanger. The ventilation channels pass through the two opposite plate surfaces so as to allow air to circulate. The plate-shaped dry heat exchanger 2 is obliquely arranged in the placement chamber 4, for example, arranged diagonally in a square chamber. The placement chamber 4 is divided into an upper chamber 41 and a lower chamber 42, so that air flows between the upper chamber 41 and the lower chamber 42 through the ventilation channels in the plate-shaped dry heat exchanger 2.

[0042] An upper plate surface of the plate-shaped dry heat exchanger 2 is obliquely arranged and faces upward, and a lower plate surface of the plate-shaped dry heat exchanger 2 is obliquely arranged and faces downward. That is, the upper plate surface of the plate-shaped dry heat exchanger 2 not only faces the top wall, but also faces a part of the vertical side wall. The lower plate surface of the plate-shaped dry heat exchanger 2 not only faces the bottom wall, but also faces the opposite part of the vertical side wall.

[0043] The upper plate surface of the plate-shaped dry heat exchanger 2 faces the first ventilation opening 43, and the lower plate surface of the plate-shaped dry heat exchanger 2 faces at least one second ventilation opening 44. It should be noted that multiple second ventilation openings 44 may be provided, in which case, one of the second ventilation openings 44 faces the lower plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction. Alternatively, a single second ventilation opening 44 may be provided, in which case, the second ventilation opening 44 faces the lower plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction.

[0044] The plate-shaped wet heat exchanger 3 may be arranged at and transverse to the first ventilation opening 43 and / or at least one second ventilation opening 44. The plate-shaped wet heat exchanger 3 may be provided only at the first ventilation opening 43 or at the second ventilation opening 44. Alternatively, the plate-shaped wet heat exchanger 3 may be provided at each of the first ventilation opening 43 and the second ventilation opening 44. Such a sentence as “the plate-shaped wet heat exchanger 3 is provided at at least one second ventilation opening 44” means that, if there is a single second ventilation opening 44, the plate-shaped wet heat exchanger 3 is provided at the second ventilation opening 44; and if there are multiple second ventilation openings 44, the plate-shaped wet heat exchanger 3 may be provided at one or some or all of the second ventilation openings 44.

[0045] Such a sentence as “the plate-shaped wet heat exchanger 3 transverses to the ventilation opening (e.g., the first ventilation opening 43 and the second ventilation opening 44)” means that the plate-shaped wet heat exchanger extends in a direction perpendicular to the ventilation direction of the ventilation opening. The transverse direction of the ventilation opening refers to a direction perpendicular to the ventilation direction of the ventilation opening. For example, the plate-shaped wet heat exchanger 3 is arranged horizontally at the first ventilation opening 43; and is arranged vertically or substantially vertically at the second ventilation opening 44.

[0046] In some embodiments, when the dry-wet combined heat exchange device is used, the plate-shaped dry heat exchanger 2 is firstly placed obliquely so as to ensure that the plate-shaped dry heat exchanger 2 can be maximized within a limited space to meet the requirement for the ventilation area of the dry heat exchanger. The plate-shaped wet heat exchanger 3 is attached to the top wall or the side wall at the corresponding ventilation opening, so as to ensure the ventilation requirement and maximize the structure to ensure the cooling requirement. Meanwhile, arranging the plate-shaped dry condenser obliquely does not adversely affect the cooling effect, even can realize optimal cooling effect, and results in a compact overall structure. In summary, the dry-wet combined heat exchange device can effectively solve the problem of a large size of the conventional dry-wet combined heat exchange device.

[0047] In some embodiments, as shown in FIG. 1, the second ventilation opening 44 may be provided in the part of the vertical side wall of the placement chamber 4 facing the lower plate surface of the plate-shaped dry heat exchanger in the horizontal direction. In this case, the plate-shaped wet heat exchanger(s) 3 is arranged at the second ventilation opening 44, and the ventilation channels in the plate-shaped wet heat exchanger(s) 3 are connected in series with the ventilation channels in the plate-shaped dry heat exchanger 2. The air may flow from the upper chamber 41, through the plate-shaped dry heat exchanger 2, into the lower chamber 42, and then be discharged through the plate-shaped wet heat exchanger(s) 3 at the second ventilation opening 44. Alternatively, the air may pass through the plate-shaped wet heat exchanger(s) 3 at the second ventilation opening 44, enter the lower chamber 42, pass through the plate-shaped dry heat exchanger 2, enter the upper chamber 41 and then flow out.

[0048] In some embodiments, the plate-shaped wet heat exchanger 3 or all of the plate-shaped wet heat exchangers 3 may be arranged at the second ventilation opening 44, and no plate-shaped wet heat exchanger 3 is arranged at the first ventilation opening 43, so that the first ventilation opening 43 is open without presence of the plate-shaped wet heat exchanger 3. The plate-shaped wet heat exchanger(s) 3 is each arranged in the side wall of the placement chamber 4. Since the plate-shaped wet heat exchanger(s) 3 is vertically arranged at the second ventilation opening 44, it is possible to ensure the water spraying height. In addition, because the plate-shaped wet heat exchanger 3 is located at the same height as the plate-shaped dry heat exchanger 2, the liquid falling from the plate-shaped wet heat exchanger 3 can be prevented from entering the plate-shaped dry heat exchanger 2.

[0049] In some embodiments, at least one side wall of the placement chamber 4 may be provided with a third ventilation opening 45 that is in communication with the lower chamber 42. The plate-shaped wet heat exchanger(s) 3 is arranged at the second ventilation opening 44 in communication with the lower chamber 42, so that the ventilation channels in the plate-shaped wet heat exchanger 3 may be connected in parallel with the ventilation channels in the plate-shaped dry heat exchanger 2. In this case, the third ventilation opening 45 may be used as an air inlet, and the first ventilation opening 43 and the second ventilation opening 44 in communication with the lower chamber 42 are used as air outlets. Alternatively, the third ventilation opening 45 may be used as an air outlet, and the first ventilation opening 43 and the second ventilation opening 44 in communication with the lower chamber 42 are used as air inlets.

[0050] In some embodiments, the plate-shaped wet heat exchanger 3 may be arranged at the second ventilation opening 44 facing the lower plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction. That is, the plate-shaped wet heat exchanger 3 is only arranged at the second ventilation opening 44 facing the lower plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction, so that the plate-shaped dry heat exchanger 2 faces the plate-shaped wet heat exchanger 3. In this case, the third ventilation opening 45 is located in the vertical side wall between the plate-shaped dry heat exchanger 2 and the plate-shaped wet heat exchanger 3. That is, the third ventilation opening 45 is located in the vertical side wall between the lower plate surface of the plate-shaped dry heat exchanger 2 and the part of the vertical side wall facing the lower plate surface. A central axis of the third ventilation opening 45 may be parallel to the plate-shaped dry heat exchanger 2 and the plate-shaped wet heat exchanger 3.

[0051] For ease of description, the part of the vertical side wall of the placement chamber 4 facing the lower plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction is called a front vertical side wall part; the part of the vertical side wall facing the upper plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction is called a rear vertical side wall part; and a left vertical side wall part and a right vertical side wall part are respectively formed on a left side and a right side of the plate-shaped dry heat exchanger 2. The front vertical side wall part, the rear vertical side wall part, the left vertical side wall part and the right vertical side wall part may all be planar to jointly form a square placement chamber 4; or they can all be arc-shaped to jointly form a cylindrical placement chamber 4.

[0052] The third ventilation opening 45 may be provided in one or both of the left vertical side wall part or the right vertical side wall part. It can be noted that the third ventilation opening 45 on the left vertical side wall part or the right vertical side wall part should be located on a part of the vertical side wall defining the lower chamber 42. The front vertical side wall part may be provided with the second ventilation opening and the plate-shaped wet heat exchanger 3.

[0053] In some embodiments, a fan 5 for accelerating the flow of the air may be arranged at at least one of the first ventilation opening 43, the second ventilation opening 44 and the third ventilation opening 45. It should be noted that, when multiple ventilation openings and multiple fans 5 are provided, the air flow directions of the fans 5 may be set as required. In this case, air may be introduced into the placement chamber 4 or pumped out of the placement chamber 4, and the fans 5 may be the same or different, which may be set as required.

[0054] In some embodiments, at least one of the first ventilation opening 43, the second ventilation opening 44 and the third ventilation opening 45 may be provided with a door for opening or closing the corresponding ventilation opening(s) as required. The door may be a roller shutter door, a sliding door, or the like, which can partially or fully block airflow.

[0055] In some embodiments, fans 5 that can be independently turned on and off to pump air to the outside are respectively arranged at the first ventilation opening 43, the third ventilation opening 45, and the second ventilation opening 44 in communication with the lower chamber 42. Alternatively, fans 5 that can be independently turned on and off to introduce air to the inside are respectively arranged at the first ventilation opening 43, the third ventilation opening 45, and the second ventilation opening 44 in communication with the lower chamber 42. Each of the first ventilation opening 43, the third ventilation opening 45, and the second ventilation opening 44 in communication with the lower chamber 42 is provided with a door that can be independently opened and closed. Correspondingly, a plate-shaped wet heat exchanger 3 is arranged at each second ventilation opening 44 in communication with the lower chamber 42.

[0056] The fans 5 independently turned on and off to pump air to the outside and respectively arranged at the first ventilation opening 43, the third ventilation opening 45, and the second ventilation opening 44 in communication with the lower chamber 42 will be described as an example. For ease of description, a first fan and a first door are arranged at the first ventilation opening 43; a second fan and a second door are arranged at the second ventilation opening 44 in communication with the lower chamber 42; and a third fan and a third door are arranged at the third ventilation opening.

[0057] There are the following operation modes.

[0058] In a first mode, the dry heat exchanger is used alone. The third fan may be turned on, while the first fan and the second fan are both turned off. In addition, the first door and the third door are both opened, while the second door is closed. In this case, the air enters from the first ventilation opening 43, flows through the plate-shaped dry heat exchanger 2 into the lower chamber 42, and then is directly discharged from the third ventilation opening 45.

[0059] In a second mode, the wet heat exchanger is used alone. The third fan may be turned on, while the first fan and the second fan are both turned off. The second door and the third door are both opened, while the first door is closed. In this case, the air enters from the second ventilation opening 44 located at the lower chamber 42, flows through the plate-shaped wet heat exchanger 3 into the lower chamber 42, and then is directly discharged from the third ventilation opening 45. When the dry heat exchanger or the wet heat exchanger is used alone, airflow resistance can be effectively reduced.

[0060] In a third mode, the dry heat exchanger and the wet heat exchanger are used in series. The third fan may be turned off, while the first fan or the second fan may be turned on (which may be selected based on the requirement of air flow direction during series connection). The first door and the second door are both opened, while the third door is closed. When the first fan is turned on and the second fan is turned off, and in this case, the air enters from the second ventilation opening 44 located at the lower chamber 42, flows through the plate-shaped wet heat exchanger 3 into the lower chamber 42, then flows through the plate-shaped dry heat exchanger 2 into the upper chamber 41, and then is directly discharged from the first ventilation opening 43. Alternatively, the air may be discharged from the second ventilation opening 44 located at the upper chamber 41. In this case, the dry-wet combined heat exchange device may not be provided with the first ventilation opening 43, and the first ventilation opening 43 of the dry-wet combined heat exchange device is completely replaced by the second ventilation opening 44 located at the upper chamber 41. When the second fan is turned on and the first fan is turned off, the air flows in a direction opposite to that described above.

[0061] In a fourth mode, the dry heat exchanger and the wet heat exchanger are used in parallel. The third fan may be turned on, while the first fan and the second fan are both turned off; and the first door, the second door, and the third door are all opened. In this case, on the one hand, the air enters from the first ventilation opening 43, flows through the plate-shaped dry heat exchanger 2 into the lower chamber 42, and then is directly discharged from the third ventilation opening 45; and on the other hand, the air enters from the second ventilation opening 44 located at the lower chamber 42, flows through the plate-shaped wet heat exchanger 3 into the lower chamber 42, and then is directly discharged from the third ventilation opening 45.

[0062] Through the above arrangement, it can be found that the above structure is simple, and several communication modes can be selected without complex channels, so that the dry-wet combined heat exchange device can be better applied to the corresponding use environment.

[0063] In some embodiments, the above third ventilation opening may be used as a fresh air opening. When the ventilation channels in the plate-shaped dry heat exchanger are connected in series with the ventilation channels in the plate-shaped wet heat exchanger, it is difficult to ensure that the ventilation efficiency meets the requirement due to the primary airflow resistance. In this case, the third ventilation opening is opened to supplement air midway. The third ventilation opening may be sized based on the operation efficiency of the fan(s) and the airflow resistance of the ventilation channels. Excessive air supplement may cause bypass of the ventilation channels located in front of the third ventilation opening.

[0064] If the air flows from the ventilation channels of the plate-shaped wet heat exchanger to the ventilation channels of the plate-shaped dry heat exchanger and the fan at the first ventilation opening is used to pump air to the outside, when the third ventilation opening is opened, a portion of the air entering the ventilation channels of the plate-shaped dry heat exchanger comes from the third ventilation opening, and the other portion thereof comes from the plate-shaped wet heat exchanger. In this case, if the opening degree of the third ventilation opening is too large, the ventilation channels of the plate-shaped wet heat exchanger may be bypassed.

[0065] In some embodiments, a door with an adjustable opening may be arranged at the third ventilation opening. The opening degree of the door can be controlled by a servo motor. If the door is a sliding door, an electric actuator may be provided to push the sliding door and may adopt a servo motor to realize accurate control. Specifically, the opening degree of the door may be controlled based on the air pressure in the lower chamber. The opening degree of the door is increased if the air pressure is low, and is reduced if the air pressure is high.

[0066] In some embodiments, the part of the vertical side wall of the placement chamber 4 facing the upper plate surface of the plate-shaped dry heat exchanger 2 may be closed, that is, the rear vertical side wall is in a closed state. Through the arrangement, it is convenient for two dry-wet combined heat exchange devices to be arranged back to back, which not only facilitates optimal space utilization but also allows sharing of a common back panel, thereby reducing the cost. Further, the upper chamber 41 can be in direct communication with the outside only through the first ventilation opening 43, achieving better control of the airflow direction. Alternatively, the rear side vertical side walls of the two placement chambers 4 may be removed to realize communication between them.

[0067] In some embodiments, as shown in FIGS. 3 and 4, two placement chambers 4 are provided side by side inside the rack 1, and two plate-shaped dry heat exchangers 2 are respectively obliquely placed in the two placement chambers 4 and jointly form a V-shaped structure with an upward opening. In this case, the upper chambers 41 of the two placement chambers 4 are adjacent to each other, or they may be in communication with each other with the rear vertical side walls of the two placement chambers 4 removed. Thus, the two first ventilation openings 43 may be integrated or separated. When integrated, a single fan 5 may be arranged at the first ventilation opening 43; or multiple fans 5 are arranged in parallel in the transverse direction at the first ventilation opening 43. The walls of the two placement chambers 4 that are far away from each other may be provided with the second ventilation openings 44 and the plate-shaped wet heat exchangers 3. In this case, each of the two second ventilation openings 44 may serve as an air inlet.

[0068] In some embodiments, alternatively, the two plate-shaped dry heat exchangers 2 may be obliquely placed in the two placement chambers 4 respectively and jointly form a V-shaped structure with a downward opening, and in this case, the lower chambers 42 of the two placement chambers 4 are adjacent to each other.

[0069] In some embodiments, as shown in FIGS. 1 and 3, multiple plate-shaped wet heat exchangers 3 are sequentially arranged side by side in the vertical direction at the second ventilation opening 44, in order to prevent a liquid within the wet heat exchanger from flowing over a long distance in the vertical direction, which would otherwise lead to more severe scaling and corrosion at an upper part of the wet heat exchanger than at a lower part of the wet heat exchanger and thus cannot reach the maximum service life.

[0070] In some embodiments, when multiple plate-shaped wet heat exchangers 3 are arranged at the second ventilation opening 44, the multiple plate-shaped wet heat exchangers 3 may be sequentially arranged side by side in the vertical direction, and they are aligned with each other in a straight line from top to bottom, as shown in FIG. 1.

[0071] In some embodiments, as shown in FIGS. 4 and 5, at the second ventilation opening 44 facing the lower plate surface of the plate-shaped dry heat exchanger 2 horizontally, multiple plate-shaped wet heat exchangers 3 are sequentially and inwardly arranged in the vertical direction, so as to prevent an excessively large space within the lower chamber 42 which may cause disordered airflow. As shown in FIG. 4, the plate-shaped wet heat exchangers 3 are vertically arranged. As shown in FIG. 5, the plate-shaped wet heat exchangers 3 are obliquely arranged to ensure the ventilation area.

[0072] In some embodiments, as shown in FIG. 4, for two plate-shaped wet heat exchangers 3 adjacent to each other in the vertical direction, a lower end of the upper plate-shaped wet heat exchanger 3 may be overlapped with an upper end of the lower plate-shaped wet heat exchanger 3 in the vertical direction, so as to avoid the upper spray heads and the lower water collection tanks of the plate-shaped wet heat exchangers 3 from occupying a large space in the transverse direction of the ventilation opening.

[0073] In some embodiments, the multiple plate-shaped wet heat exchangers 3 arranged side by side in the vertical direction are provided in parallel or in series.

[0074] In some embodiments, the heat-conducting fluid channels of at least one of the plate-shaped wet heat exchangers 3 are connected in series with the heat-conducting fluid channels of the plate-shaped dry heat exchanger 2. Alternatively, the heat-conducting fluid channels of at least one of the plate-shaped wet heat exchangers 3 are connected in parallel with the heat-conducting fluid channels of the plate-shaped dry heat exchanger 2.

[0075] In some embodiments, the plate-shaped wet heat exchangers 3 arranged at the second ventilation opening 44 in communication with the lower chamber 42 are in parallel with each other, and are all connected in series with the plate-shaped dry heat exchanger 2.

[0076] In some embodiments, as shown in FIG. 1, a dry-wet combined heat exchange device is provided, mainly including a rack 1, a plate-shaped dry heat exchanger 2 and multiple plate-shaped wet heat exchangers 3. A square placement chamber 4 is formed inside the rack 1; the first ventilation opening 43 is provided in the top wall of the placement chamber 4; and a first fan for pumping air upward is provided at the first ventilation opening 43.

[0077] The plate-shaped dry heat exchanger 2 is obliquely placed in the placement chamber 4 to divide the placement chamber 4 into an upper chamber 41 and a lower chamber 42. For the upper chamber 41, the first ventilation opening 43 is only provided in the top wall.

[0078] For the lower chamber 42, among the side walls of the placement chamber 4, a front vertical side wall facing a lower plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction is provided with a second ventilation opening 44, and the plate-shaped wet heat exchanger 3 is provided at the second ventilation opening 44.

[0079] At the lower chamber 42, a third ventilation opening 45 is provided in a left vertical side wall and / or a right vertical side wall, and it is in communication with the lower chamber 42.

[0080] A support seat is provided at a bottom of the plate-shaped dry heat exchanger 2, and a guide slope is provided between the support seat and a bottom of the second ventilation opening 44, and the guide slope gradually extends upward in a direction close to the plate-shaped dry heat exchanger 2.

[0081] In some embodiments, as shown in FIG. 2, a dry-wet combined heat exchange device is provided, mainly including a rack 1, a plate-shaped dry heat exchanger 2 and multiple plate-shaped wet heat exchangers 3. A square placement chamber 4 is formed inside the rack 1; the first ventilation opening 43 is provided in the top wall of the placement chamber 4; and a first fan for pumping air upward is provided at the first ventilation opening 43.

[0082] The plate-shaped dry heat exchanger 2 is obliquely placed in the placement chamber 4 to divide the placement chamber 4 into an upper chamber 41 and a lower chamber 42.

[0083] At the lower chamber 42, among the side walls of the placement chamber 4, a second ventilation opening 44 is provided in a front vertical side wall facing a lower plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction. The second ventilation opening 44 is open, and no plate-shaped dry heat exchanger 2 is provided.

[0084] At the upper chamber 41, among the side walls of the placement chamber 4, a rear vertical side wall facing an upper plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction is also provided with a second ventilation opening 44, and the plate-shaped wet heat exchanger 3 is provided at the second ventilation opening 44. A first fan 5 for pumping air upward is provided at the first ventilation opening 43.

[0085] In this case, the ventilation channels of the plate-shaped dry heat exchanger 2 are arranged in parallel with the ventilation channels of the plate-shaped wet heat exchanger 3.

[0086] The embodiments in this specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts between the embodiments may be referred to each other.

[0087] The above description of the disclosed embodiments enables those skilled in the art to implement or practice the present application. 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 and scope of the present application. Thus, the present application will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Examples

Embodiment Construction

[0033]There is disclosed in the embodiments of the present application a dry-wet combined heat exchange device, which can effectively solve the problem that the dry-wet combined heat exchange device occupies a large space.

[0034]The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some, not all, of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts will fall within the protection scope of the present application.

[0035]Referring to FIGS. 1 to 5, FIG. 1 is a schematic structural view of a dry-wet combined heat exchange device according to an embodiment of the present application; FIG. 2 is a schematic structural view of another dry-wet combined heat exchange de...

[0001] The present application is a national phase application of the international patent application PCT / CN2023 / 121034, filed on Sep. 25, 2023, which claims priority to Chinese Patent Application No. 202211435106.5, titled “DRY-WET COMBINED HEAT EXCHANGE DEVICE”, filed on Nov. 16, 2022 with the China National Intellectual Property Administration, which are incorporated herein by reference in their entireties.FIELD

[0002] The present application relates to the technical field of heat exchange and, in particular, to a dry-wet combined heat exchange device.BACKGROUND

[0003] In the conventional technology, a dry heat exchanger and a plate-shaped wet heat exchanger are combined for use together. For example, a hybrid heat exchanger device and a method for operating the same are disclosed in the Chinese Patent Application No. 201180044407.9, in which two plate-shaped wet heat exchangers are provided. A water spraying device of one of the plate-shaped wet heat exchangers may be selectively turned on or off. When turned off, this plate-shaped wet heat exchanger functions as a dry heat exchanger. When the heat exchanger is used as a combination of a dry heat exchanger and a wet heat exchanger, there may be constraints. When it functions as a dry heat exchanger, it fails to achieve better heat exchange effect compared with a dedicated dry heat exchanger.

[0004] For example, a dry-wet combined cooling tower control system and a method for operating the same are disclosed in a Chinese Patent Application No. 202111615972.8, in which a dry heat exchanger and a plate-shaped wet heat exchanger are provided and have pipelines connected in series to form a dry-wet combined heat exchanger. Thus, both the dry heat exchanger and the plate-shaped wet heat exchanger can play their optimal functions, and it is possible to avoid the problem of rapid scale formation caused by excessive operation pressure in the plate-shaped wet heat exchanger. However, this solution still does not achieve the best cooling effect.

[0005] For the above two kinds of heat exchange devices, a dry heat exchanger and a plate-shaped wet heat exchanger are both provided in the spatial structure where they are arranged in parallel in a vertical direction or a horizontal direction, resulting in a very large overall size and a very large footprint.

[0006] In summary, it is desired for those skilled in the art to effectively solve the problem of a large footprint of the dry-wet combined heat exchange device.SUMMARY

[0007] In view of this, a first object of the present application is to provide a dry-wet combined heat exchange device, which can effectively solve the problem a large footprint of the dry-wet combined heat exchange device.

[0008] In order to achieve the first object, the following technical solutions are proposed in the present application.

[0009] A dry-wet combined heat exchange device includes a rack, a plate-shaped dry heat exchanger and a plate-shaped wet heat exchanger. A placement chamber is formed inside the rack. A first ventilation opening is formed in and runs through the top of the placement chamber in a vertical direction, and a second ventilation opening is formed in and runs through one or more sides of the placement cavity in a horizontal direction. The plate-shaped dry heat exchanger is obliquely arranged in the placement chamber to divide the placement chamber into an upper chamber and a lower chamber, and has an upper plate surface facing the first ventilation opening, and a lower plate surface facing at least one second ventilation opening. The plate-shaped wet heat exchanger is arranged at the first ventilation opening and / or at least one second ventilation opening and extends in a transverse direction of the ventilation opening.

[0010] When the dry-wet combined heat exchange device is used, the plate-shaped dry heat exchanger is firstly placed obliquely so as to ensure that the plate-shaped dry heat exchanger can be maximized within a limited space and ensure the requirement for the ventilation area of the dry heat exchanger. The plate-shaped wet heat exchanger 3 is attached to the top wall or the side wall at the corresponding ventilation opening, so as to ensure the ventilation requirement and maximize the structure to ensure the cooling requirement. Meanwhile, arranging the plate-shaped dry condenser obliquely does not adversely affect the cooling effect, even can realize optimal cooling effect, and results in a compact overall structure. In summary, the dry-wet combined heat exchange device can effectively solve the problem of a large size of the conventional dry-wet combined heat exchange device.

[0011] In an embodiment, the second ventilation opening or each second ventilation opening is provided at a part of a vertical side wall of the placement chamber facing the lower plate surface of the plate-shaped dry heat exchanger in the horizontal direction.

[0012] In an embodiment, the plate-shaped wet heat exchanger or each plate-shaped wet heat exchanger is arranged at the second ventilation opening.

[0013] In an embodiment, at least one part of the side wall of the placement chamber is provided with a third ventilation opening that is in communication with the lower chamber; and the plate-shaped wet heat exchanger is arranged at the second ventilation opening in communication with the lower chamber.

[0014] In an embodiment, the plate-shaped wet heat exchanger is arranged at the second ventilation opening facing the lower plate surface of the plate-shaped dry heat exchanger in the horizontal direction; and the third ventilation opening is located in the vertical side wall of the placement chamber between the plate-shaped dry heat exchanger and the plate-shaped wet heat exchanger.

[0015] In an embodiment, a fan for accelerating flow of air is provided at at least one of the first ventilation opening, the second ventilation opening and the third ventilation opening.

[0016] In an embodiment, a door is provided at at least one of the first ventilation opening, the second ventilation opening and the third ventilation opening.

[0017] In an embodiment, a fan is provided at each of the first ventilation opening, the third ventilation opening, and the second ventilation opening in communication with the lower chamber. The fans are configured to be independently turned on and off. The fans are all configured to pump air to the outside, or are all configured to introduce air to the inside. A door is provided at each of the first ventilation opening, the third ventilation opening, and the second ventilation opening in communication with the lower chamber. The doors are configured to be independently opened and closed.

[0018] In an embodiment, a door with an adjustable opening is arranged at the third ventilation opening.

[0019] In an embodiment, two placement chambers are provided side by side inside the rack, and are communicated with each other. Two plate-shaped dry heat exchangers are obliquely placed in the two placement chambers, respectively, jointly forming a V-shaped structure with an upward opening. Parts of side walls of the two placement chambers that are far away from each other are each provided with the second ventilation opening and the plate-shaped wet heat exchanger

[0020] In an embodiment, a plurality of plate-shaped wet heat exchangers are sequentially arranged side by side in the vertical direction at the second ventilation opening.

[0021] In an embodiment, the plate-shaped wet heat exchangers are a wet-film heat exchanger, a spray heat exchanger or an atomization heat exchanger.

[0022] In an embodiment, at the second ventilation opening facing the lower plate surface of the plate-shaped dry heat exchanger in the horizontal direction, the plurality of plate-shaped wet heat exchangers are arranged sequentially and inwardly in the vertical direction.

[0023] In an embodiment, a lower end of the upper one of two adjacent plate-shaped wet heat exchangers is overlapped with an upper end of the lower one of the two adjacent plate-shaped wet heat exchangers in the vertical direction.

[0024] In an embodiment, the plurality of plate-shaped wet heat exchangers arranged side by side in the vertical direction are coupled in parallel.

[0025] In an embodiment, heat-conducting fluid channels in at least one of the plate-shaped wet heat exchangers are connected in series with heat-conducting fluid channels in the plate-shaped dry heat exchanger.

[0026] In an embodiment, the placement chamber is a square chamber or a cylindrical chamber.BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the conventional technology, the accompanying drawings required in the description of the embodiments or the conventional technology will be briefly described below. Obviously, the accompanying drawings in the following description merely relate to some embodiments of the present application, and other drawings may be obtained by those skilled in the art based on the provided accompanying drawings without any creative effort.

[0028] FIG. 1 is a schematic structural view of a dry-wet combined heat exchange device according to an embodiment of the present application;

[0029] FIG. 2 is a schematic structural view of another dry-wet combined heat exchange device according to an embodiment of the present application;

[0030] FIG. 3 is a schematic structural view of a back-to-back dry-wet combined heat exchange device according to an embodiment of the present application;

[0031] FIG. 4 is a schematic structural view of another dry-wet combined heat exchange device according to an embodiment of the present application; and

[0032] FIG. 5 is a schematic structural view showing details of a dry-wet combined heat exchange device according to an embodiment of the present application.LIST OF REFERENCE NUMERALS1.rack;2.plate-shaped dry heat exchanger;3.plate-shaped wet heat exchanger;4.placement chamber;5.fan;41.upper chamber;42.lower chamber;43.first ventilation opening;44.second ventilation opening;45.third ventilation opening.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] There is disclosed in the embodiments of the present application a dry-wet combined heat exchange device, which can effectively solve the problem that the dry-wet combined heat exchange device occupies a large space.

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some, not all, of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts will fall within the protection scope of the present application.

[0035] Referring to FIGS. 1 to 5, FIG. 1 is a schematic structural view of a dry-wet combined heat exchange device according to an embodiment of the present application; FIG. 2 is a schematic structural view of another dry-wet combined heat exchange device according to an embodiment of the present application; FIG. 3 is a schematic structural view of a back-to-back dry-wet combined heat exchange device according to an embodiment of the present application;

[0036] FIG. 4 is a schematic structural view of another dry-wet combined heat exchange device according to an embodiment of the present application; and FIG. 5 is a schematic structural view showing details of a dry-wet combined heat exchange device according to an embodiment of the present application.

[0037] In some embodiments, a dry-wet combined heat exchange device is provided. The dry-wet combined heat exchange device mainly includes a rack 1, a plate-shaped dry heat exchanger 2 and a plate-shaped wet heat exchanger 3. One or more plate-shaped dry heat exchanger 2 may be provided, and one or more plate-shaped wet heat exchanger 3 may be provided. Heat-conducting fluid channels in the plate-shaped wet heat exchanger 3 are connected in series or in parallel with heat-conducting fluid channels in the plate-shaped dry heat exchanger 2; or some of the heat-conducting fluid channels in the plate-shaped wet heat exchanger 3 are connected in series with some of heat-conducting fluid channels in the plate-shaped dry heat exchanger 2, and the other heat-conducting fluid channels in the plate-shaped wet heat exchanger 3 are connected in parallel with the other heat-conducting fluid channels in the plate-shaped dry heat exchanger 2. The plate-shaped dry heat exchanger 2 and the plate-shaped wet heat exchanger 3 may be a condenser or a cooler. For example, a refrigerant is circulated in the condenser and may undergo a phase change, and water is circulated in the cooler and may generally not undergo a phase change. The plate-shaped wet heat exchanger 3 and the plate-shaped dry heat exchanger 2 both refer to that the heat exchanger has a plate-like structure as a whole, through which air flows generally in a plate thickness direction, so that the heat exchanger is flat and thin. The plate-shaped wet heat exchanger 3 is a wet-film heat exchanger, a spray heat exchanger, an atomization heat exchanger, or any other heat exchanger. When multiple plate-shaped wet heat exchangers 3 are provided, they may differ in structure from one another. As shown, the plate-shaped wet heat exchanger 3 has a sprinkler head at the upper part, heat exchange pipelines at the middle part, and a water collection tank at the lower part.

[0038] A placement chamber 4 is formed inside the rack 1. The placement chamber 4 may be substantially square or cylindrical, for example, a square chamber, a cylindrical chamber, or the like. The placement chamber 4 mainly extends in a vertical direction. For ease of description, walls of the placement chamber 4 include a top wall, a bottom wall and a vertical side wall. The top wall and the bottom wall are oppositely arranged, and the side vertical walls are connected between the top wall and the bottom wall.

[0039] A first ventilation opening 43 is formed in and runs through the top wall of the placement chamber 4 in a vertical direction, and a second ventilation opening 44 is formed in and runs through the side wall(s) of the placement chamber in a horizontal direction. Generally speaking, one of the first ventilation opening 43 and the second ventilation opening 44 acts as an air inlet for introducing air into the placement chamber 4, and the other of the first ventilation opening 43 and the second ventilation opening 44 acts as an air outlet for discharging air out of the placement chamber 4. Alternatively, each of the first ventilation opening 43 and the second ventilation opening 44 acts as an air inlet or an air outlet, and an additional ventilation opening is provided to act as an air outlet or an air inlet correspondingly. The ventilation channels in the plate-shaped dry heat exchanger 2 may be connected in series or in parallel with the ventilation channels in the plate-shaped wet heat exchanger 3, which may be determined based on needs in practical application.

[0040] The first ventilation opening 43 extends vertically to discharge air in the vertical direction. Such a sentence as “the first ventilation opening 43 extends vertically” does not mean that the first ventilation opening extends in the perfectly vertical direction, in other words, the first ventilation opening 43 may be provided obliquely. The second ventilation opening 44 extends horizontally, which does not mean that the second ventilation opening extends in the perfectly horizontal direction, in other words, the second ventilation opening 44 may extend in a substantially horizontal direction.

[0041] The plate-shaped dry heat exchanger 2 is obliquely arranged in the placement chamber 4 to divide the placement chamber 4 into an upper chamber 41 and a lower chamber 42. The plate-shaped dry heat exchanger 2 has a plate-shaped structure as a whole. The plate-shaped dry heat exchanger 2 may be a plate heat exchanger, or a plate-fin heat exchanger. The ventilation channels pass through the two opposite plate surfaces so as to allow air to circulate. The plate-shaped dry heat exchanger 2 is obliquely arranged in the placement chamber 4, for example, arranged diagonally in a square chamber. The placement chamber 4 is divided into an upper chamber 41 and a lower chamber 42, so that air flows between the upper chamber 41 and the lower chamber 42 through the ventilation channels in the plate-shaped dry heat exchanger 2.

[0042] An upper plate surface of the plate-shaped dry heat exchanger 2 is obliquely arranged and faces upward, and a lower plate surface of the plate-shaped dry heat exchanger 2 is obliquely arranged and faces downward. That is, the upper plate surface of the plate-shaped dry heat exchanger 2 not only faces the top wall, but also faces a part of the vertical side wall. The lower plate surface of the plate-shaped dry heat exchanger 2 not only faces the bottom wall, but also faces the opposite part of the vertical side wall.

[0043] The upper plate surface of the plate-shaped dry heat exchanger 2 faces the first ventilation opening 43, and the lower plate surface of the plate-shaped dry heat exchanger 2 faces at least one second ventilation opening 44. It should be noted that multiple second ventilation openings 44 may be provided, in which case, one of the second ventilation openings 44 faces the lower plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction. Alternatively, a single second ventilation opening 44 may be provided, in which case, the second ventilation opening 44 faces the lower plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction.

[0044] The plate-shaped wet heat exchanger 3 may be arranged at and transverse to the first ventilation opening 43 and / or at least one second ventilation opening 44. The plate-shaped wet heat exchanger 3 may be provided only at the first ventilation opening 43 or at the second ventilation opening 44. Alternatively, the plate-shaped wet heat exchanger 3 may be provided at each of the first ventilation opening 43 and the second ventilation opening 44. Such a sentence as “the plate-shaped wet heat exchanger 3 is provided at at least one second ventilation opening 44” means that, if there is a single second ventilation opening 44, the plate-shaped wet heat exchanger 3 is provided at the second ventilation opening 44; and if there are multiple second ventilation openings 44, the plate-shaped wet heat exchanger 3 may be provided at one or some or all of the second ventilation openings 44.

[0045] Such a sentence as “the plate-shaped wet heat exchanger 3 transverses to the ventilation opening (e.g., the first ventilation opening 43 and the second ventilation opening 44)” means that the plate-shaped wet heat exchanger extends in a direction perpendicular to the ventilation direction of the ventilation opening. The transverse direction of the ventilation opening refers to a direction perpendicular to the ventilation direction of the ventilation opening. For example, the plate-shaped wet heat exchanger 3 is arranged horizontally at the first ventilation opening 43; and is arranged vertically or substantially vertically at the second ventilation opening 44.

[0046] In some embodiments, when the dry-wet combined heat exchange device is used, the plate-shaped dry heat exchanger 2 is firstly placed obliquely so as to ensure that the plate-shaped dry heat exchanger 2 can be maximized within a limited space to meet the requirement for the ventilation area of the dry heat exchanger. The plate-shaped wet heat exchanger 3 is attached to the top wall or the side wall at the corresponding ventilation opening, so as to ensure the ventilation requirement and maximize the structure to ensure the cooling requirement. Meanwhile, arranging the plate-shaped dry condenser obliquely does not adversely affect the cooling effect, even can realize optimal cooling effect, and results in a compact overall structure. In summary, the dry-wet combined heat exchange device can effectively solve the problem of a large size of the conventional dry-wet combined heat exchange device.

[0047] In some embodiments, as shown in FIG. 1, the second ventilation opening 44 may be provided in the part of the vertical side wall of the placement chamber 4 facing the lower plate surface of the plate-shaped dry heat exchanger in the horizontal direction. In this case, the plate-shaped wet heat exchanger(s) 3 is arranged at the second ventilation opening 44, and the ventilation channels in the plate-shaped wet heat exchanger(s) 3 are connected in series with the ventilation channels in the plate-shaped dry heat exchanger 2. The air may flow from the upper chamber 41, through the plate-shaped dry heat exchanger 2, into the lower chamber 42, and then be discharged through the plate-shaped wet heat exchanger(s) 3 at the second ventilation opening 44. Alternatively, the air may pass through the plate-shaped wet heat exchanger(s) 3 at the second ventilation opening 44, enter the lower chamber 42, pass through the plate-shaped dry heat exchanger 2, enter the upper chamber 41 and then flow out.

[0048] In some embodiments, the plate-shaped wet heat exchanger 3 or all of the plate-shaped wet heat exchangers 3 may be arranged at the second ventilation opening 44, and no plate-shaped wet heat exchanger 3 is arranged at the first ventilation opening 43, so that the first ventilation opening 43 is open without presence of the plate-shaped wet heat exchanger 3. The plate-shaped wet heat exchanger(s) 3 is each arranged in the side wall of the placement chamber 4. Since the plate-shaped wet heat exchanger(s) 3 is vertically arranged at the second ventilation opening 44, it is possible to ensure the water spraying height. In addition, because the plate-shaped wet heat exchanger 3 is located at the same height as the plate-shaped dry heat exchanger 2, the liquid falling from the plate-shaped wet heat exchanger 3 can be prevented from entering the plate-shaped dry heat exchanger 2.

[0049] In some embodiments, at least one side wall of the placement chamber 4 may be provided with a third ventilation opening 45 that is in communication with the lower chamber 42. The plate-shaped wet heat exchanger(s) 3 is arranged at the second ventilation opening 44 in communication with the lower chamber 42, so that the ventilation channels in the plate-shaped wet heat exchanger 3 may be connected in parallel with the ventilation channels in the plate-shaped dry heat exchanger 2. In this case, the third ventilation opening 45 may be used as an air inlet, and the first ventilation opening 43 and the second ventilation opening 44 in communication with the lower chamber 42 are used as air outlets. Alternatively, the third ventilation opening 45 may be used as an air outlet, and the first ventilation opening 43 and the second ventilation opening 44 in communication with the lower chamber 42 are used as air inlets.

[0050] In some embodiments, the plate-shaped wet heat exchanger 3 may be arranged at the second ventilation opening 44 facing the lower plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction. That is, the plate-shaped wet heat exchanger 3 is only arranged at the second ventilation opening 44 facing the lower plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction, so that the plate-shaped dry heat exchanger 2 faces the plate-shaped wet heat exchanger 3. In this case, the third ventilation opening 45 is located in the vertical side wall between the plate-shaped dry heat exchanger 2 and the plate-shaped wet heat exchanger 3. That is, the third ventilation opening 45 is located in the vertical side wall between the lower plate surface of the plate-shaped dry heat exchanger 2 and the part of the vertical side wall facing the lower plate surface. A central axis of the third ventilation opening 45 may be parallel to the plate-shaped dry heat exchanger 2 and the plate-shaped wet heat exchanger 3.

[0051] For ease of description, the part of the vertical side wall of the placement chamber 4 facing the lower plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction is called a front vertical side wall part; the part of the vertical side wall facing the upper plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction is called a rear vertical side wall part; and a left vertical side wall part and a right vertical side wall part are respectively formed on a left side and a right side of the plate-shaped dry heat exchanger 2. The front vertical side wall part, the rear vertical side wall part, the left vertical side wall part and the right vertical side wall part may all be planar to jointly form a square placement chamber 4; or they can all be arc-shaped to jointly form a cylindrical placement chamber 4.

[0052] The third ventilation opening 45 may be provided in one or both of the left vertical side wall part or the right vertical side wall part. It can be noted that the third ventilation opening 45 on the left vertical side wall part or the right vertical side wall part should be located on a part of the vertical side wall defining the lower chamber 42. The front vertical side wall part may be provided with the second ventilation opening and the plate-shaped wet heat exchanger 3.

[0053] In some embodiments, a fan 5 for accelerating the flow of the air may be arranged at at least one of the first ventilation opening 43, the second ventilation opening 44 and the third ventilation opening 45. It should be noted that, when multiple ventilation openings and multiple fans 5 are provided, the air flow directions of the fans 5 may be set as required. In this case, air may be introduced into the placement chamber 4 or pumped out of the placement chamber 4, and the fans 5 may be the same or different, which may be set as required.

[0054] In some embodiments, at least one of the first ventilation opening 43, the second ventilation opening 44 and the third ventilation opening 45 may be provided with a door for opening or closing the corresponding ventilation opening(s) as required. The door may be a roller shutter door, a sliding door, or the like, which can partially or fully block airflow.

[0055] In some embodiments, fans 5 that can be independently turned on and off to pump air to the outside are respectively arranged at the first ventilation opening 43, the third ventilation opening 45, and the second ventilation opening 44 in communication with the lower chamber 42. Alternatively, fans 5 that can be independently turned on and off to introduce air to the inside are respectively arranged at the first ventilation opening 43, the third ventilation opening 45, and the second ventilation opening 44 in communication with the lower chamber 42. Each of the first ventilation opening 43, the third ventilation opening 45, and the second ventilation opening 44 in communication with the lower chamber 42 is provided with a door that can be independently opened and closed. Correspondingly, a plate-shaped wet heat exchanger 3 is arranged at each second ventilation opening 44 in communication with the lower chamber 42.

[0056] The fans 5 independently turned on and off to pump air to the outside and respectively arranged at the first ventilation opening 43, the third ventilation opening 45, and the second ventilation opening 44 in communication with the lower chamber 42 will be described as an example. For ease of description, a first fan and a first door are arranged at the first ventilation opening 43; a second fan and a second door are arranged at the second ventilation opening 44 in communication with the lower chamber 42; and a third fan and a third door are arranged at the third ventilation opening.

[0057] There are the following operation modes.

[0058] In a first mode, the dry heat exchanger is used alone. The third fan may be turned on, while the first fan and the second fan are both turned off. In addition, the first door and the third door are both opened, while the second door is closed. In this case, the air enters from the first ventilation opening 43, flows through the plate-shaped dry heat exchanger 2 into the lower chamber 42, and then is directly discharged from the third ventilation opening 45.

[0059] In a second mode, the wet heat exchanger is used alone. The third fan may be turned on, while the first fan and the second fan are both turned off. The second door and the third door are both opened, while the first door is closed. In this case, the air enters from the second ventilation opening 44 located at the lower chamber 42, flows through the plate-shaped wet heat exchanger 3 into the lower chamber 42, and then is directly discharged from the third ventilation opening 45. When the dry heat exchanger or the wet heat exchanger is used alone, airflow resistance can be effectively reduced.

[0060] In a third mode, the dry heat exchanger and the wet heat exchanger are used in series. The third fan may be turned off, while the first fan or the second fan may be turned on (which may be selected based on the requirement of air flow direction during series connection). The first door and the second door are both opened, while the third door is closed. When the first fan is turned on and the second fan is turned off, and in this case, the air enters from the second ventilation opening 44 located at the lower chamber 42, flows through the plate-shaped wet heat exchanger 3 into the lower chamber 42, then flows through the plate-shaped dry heat exchanger 2 into the upper chamber 41, and then is directly discharged from the first ventilation opening 43. Alternatively, the air may be discharged from the second ventilation opening 44 located at the upper chamber 41. In this case, the dry-wet combined heat exchange device may not be provided with the first ventilation opening 43, and the first ventilation opening 43 of the dry-wet combined heat exchange device is completely replaced by the second ventilation opening 44 located at the upper chamber 41. When the second fan is turned on and the first fan is turned off, the air flows in a direction opposite to that described above.

[0061] In a fourth mode, the dry heat exchanger and the wet heat exchanger are used in parallel. The third fan may be turned on, while the first fan and the second fan are both turned off; and the first door, the second door, and the third door are all opened. In this case, on the one hand, the air enters from the first ventilation opening 43, flows through the plate-shaped dry heat exchanger 2 into the lower chamber 42, and then is directly discharged from the third ventilation opening 45; and on the other hand, the air enters from the second ventilation opening 44 located at the lower chamber 42, flows through the plate-shaped wet heat exchanger 3 into the lower chamber 42, and then is directly discharged from the third ventilation opening 45.

[0062] Through the above arrangement, it can be found that the above structure is simple, and several communication modes can be selected without complex channels, so that the dry-wet combined heat exchange device can be better applied to the corresponding use environment.

[0063] In some embodiments, the above third ventilation opening may be used as a fresh air opening. When the ventilation channels in the plate-shaped dry heat exchanger are connected in series with the ventilation channels in the plate-shaped wet heat exchanger, it is difficult to ensure that the ventilation efficiency meets the requirement due to the primary airflow resistance. In this case, the third ventilation opening is opened to supplement air midway. The third ventilation opening may be sized based on the operation efficiency of the fan(s) and the airflow resistance of the ventilation channels. Excessive air supplement may cause bypass of the ventilation channels located in front of the third ventilation opening.

[0064] If the air flows from the ventilation channels of the plate-shaped wet heat exchanger to the ventilation channels of the plate-shaped dry heat exchanger and the fan at the first ventilation opening is used to pump air to the outside, when the third ventilation opening is opened, a portion of the air entering the ventilation channels of the plate-shaped dry heat exchanger comes from the third ventilation opening, and the other portion thereof comes from the plate-shaped wet heat exchanger. In this case, if the opening degree of the third ventilation opening is too large, the ventilation channels of the plate-shaped wet heat exchanger may be bypassed.

[0065] In some embodiments, a door with an adjustable opening may be arranged at the third ventilation opening. The opening degree of the door can be controlled by a servo motor. If the door is a sliding door, an electric actuator may be provided to push the sliding door and may adopt a servo motor to realize accurate control. Specifically, the opening degree of the door may be controlled based on the air pressure in the lower chamber. The opening degree of the door is increased if the air pressure is low, and is reduced if the air pressure is high.

[0066] In some embodiments, the part of the vertical side wall of the placement chamber 4 facing the upper plate surface of the plate-shaped dry heat exchanger 2 may be closed, that is, the rear vertical side wall is in a closed state. Through the arrangement, it is convenient for two dry-wet combined heat exchange devices to be arranged back to back, which not only facilitates optimal space utilization but also allows sharing of a common back panel, thereby reducing the cost. Further, the upper chamber 41 can be in direct communication with the outside only through the first ventilation opening 43, achieving better control of the airflow direction. Alternatively, the rear side vertical side walls of the two placement chambers 4 may be removed to realize communication between them.

[0067] In some embodiments, as shown in FIGS. 3 and 4, two placement chambers 4 are provided side by side inside the rack 1, and two plate-shaped dry heat exchangers 2 are respectively obliquely placed in the two placement chambers 4 and jointly form a V-shaped structure with an upward opening. In this case, the upper chambers 41 of the two placement chambers 4 are adjacent to each other, or they may be in communication with each other with the rear vertical side walls of the two placement chambers 4 removed. Thus, the two first ventilation openings 43 may be integrated or separated. When integrated, a single fan 5 may be arranged at the first ventilation opening 43; or multiple fans 5 are arranged in parallel in the transverse direction at the first ventilation opening 43. The walls of the two placement chambers 4 that are far away from each other may be provided with the second ventilation openings 44 and the plate-shaped wet heat exchangers 3. In this case, each of the two second ventilation openings 44 may serve as an air inlet.

[0068] In some embodiments, alternatively, the two plate-shaped dry heat exchangers 2 may be obliquely placed in the two placement chambers 4 respectively and jointly form a V-shaped structure with a downward opening, and in this case, the lower chambers 42 of the two placement chambers 4 are adjacent to each other.

[0069] In some embodiments, as shown in FIGS. 1 and 3, multiple plate-shaped wet heat exchangers 3 are sequentially arranged side by side in the vertical direction at the second ventilation opening 44, in order to prevent a liquid within the wet heat exchanger from flowing over a long distance in the vertical direction, which would otherwise lead to more severe scaling and corrosion at an upper part of the wet heat exchanger than at a lower part of the wet heat exchanger and thus cannot reach the maximum service life.

[0070] In some embodiments, when multiple plate-shaped wet heat exchangers 3 are arranged at the second ventilation opening 44, the multiple plate-shaped wet heat exchangers 3 may be sequentially arranged side by side in the vertical direction, and they are aligned with each other in a straight line from top to bottom, as shown in FIG. 1.

[0071] In some embodiments, as shown in FIGS. 4 and 5, at the second ventilation opening 44 facing the lower plate surface of the plate-shaped dry heat exchanger 2 horizontally, multiple plate-shaped wet heat exchangers 3 are sequentially and inwardly arranged in the vertical direction, so as to prevent an excessively large space within the lower chamber 42 which may cause disordered airflow. As shown in FIG. 4, the plate-shaped wet heat exchangers 3 are vertically arranged. As shown in FIG. 5, the plate-shaped wet heat exchangers 3 are obliquely arranged to ensure the ventilation area.

[0072] In some embodiments, as shown in FIG. 4, for two plate-shaped wet heat exchangers 3 adjacent to each other in the vertical direction, a lower end of the upper plate-shaped wet heat exchanger 3 may be overlapped with an upper end of the lower plate-shaped wet heat exchanger 3 in the vertical direction, so as to avoid the upper spray heads and the lower water collection tanks of the plate-shaped wet heat exchangers 3 from occupying a large space in the transverse direction of the ventilation opening.

[0073] In some embodiments, the multiple plate-shaped wet heat exchangers 3 arranged side by side in the vertical direction are provided in parallel or in series.

[0074] In some embodiments, the heat-conducting fluid channels of at least one of the plate-shaped wet heat exchangers 3 are connected in series with the heat-conducting fluid channels of the plate-shaped dry heat exchanger 2. Alternatively, the heat-conducting fluid channels of at least one of the plate-shaped wet heat exchangers 3 are connected in parallel with the heat-conducting fluid channels of the plate-shaped dry heat exchanger 2.

[0075] In some embodiments, the plate-shaped wet heat exchangers 3 arranged at the second ventilation opening 44 in communication with the lower chamber 42 are in parallel with each other, and are all connected in series with the plate-shaped dry heat exchanger 2.

[0076] In some embodiments, as shown in FIG. 1, a dry-wet combined heat exchange device is provided, mainly including a rack 1, a plate-shaped dry heat exchanger 2 and multiple plate-shaped wet heat exchangers 3. A square placement chamber 4 is formed inside the rack 1; the first ventilation opening 43 is provided in the top wall of the placement chamber 4; and a first fan for pumping air upward is provided at the first ventilation opening 43.

[0077] The plate-shaped dry heat exchanger 2 is obliquely placed in the placement chamber 4 to divide the placement chamber 4 into an upper chamber 41 and a lower chamber 42. For the upper chamber 41, the first ventilation opening 43 is only provided in the top wall.

[0078] For the lower chamber 42, among the side walls of the placement chamber 4, a front vertical side wall facing a lower plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction is provided with a second ventilation opening 44, and the plate-shaped wet heat exchanger 3 is provided at the second ventilation opening 44.

[0079] At the lower chamber 42, a third ventilation opening 45 is provided in a left vertical side wall and / or a right vertical side wall, and it is in communication with the lower chamber 42.

[0080] A support seat is provided at a bottom of the plate-shaped dry heat exchanger 2, and a guide slope is provided between the support seat and a bottom of the second ventilation opening 44, and the guide slope gradually extends upward in a direction close to the plate-shaped dry heat exchanger 2.

[0081] In some embodiments, as shown in FIG. 2, a dry-wet combined heat exchange device is provided, mainly including a rack 1, a plate-shaped dry heat exchanger 2 and multiple plate-shaped wet heat exchangers 3. A square placement chamber 4 is formed inside the rack 1; the first ventilation opening 43 is provided in the top wall of the placement chamber 4; and a first fan for pumping air upward is provided at the first ventilation opening 43.

[0082] The plate-shaped dry heat exchanger 2 is obliquely placed in the placement chamber 4 to divide the placement chamber 4 into an upper chamber 41 and a lower chamber 42.

[0083] At the lower chamber 42, among the side walls of the placement chamber 4, a second ventilation opening 44 is provided in a front vertical side wall facing a lower plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction. The second ventilation opening 44 is open, and no plate-shaped dry heat exchanger 2 is provided.

[0084] At the upper chamber 41, among the side walls of the placement chamber 4, a rear vertical side wall facing an upper plate surface of the plate-shaped dry heat exchanger 2 in the horizontal direction is also provided with a second ventilation opening 44, and the plate-shaped wet heat exchanger 3 is provided at the second ventilation opening 44. A first fan 5 for pumping air upward is provided at the first ventilation opening 43.

[0085] In this case, the ventilation channels of the plate-shaped dry heat exchanger 2 are arranged in parallel with the ventilation channels of the plate-shaped wet heat exchanger 3.

[0086] The embodiments in this specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts between the embodiments may be referred to each other.

[0087] The above description of the disclosed embodiments enables those skilled in the art to implement or practice the present application. 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 and scope of the present application. Thus, the present application will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Examples

Embodiment Construction

[0033]There is disclosed in the embodiments of the present application a dry-wet combined heat exchange device, which can effectively solve the problem that the dry-wet combined heat exchange device occupies a large space.

[0034]The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some, not all, of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts will fall within the protection scope of the present application.

[0035]Referring to FIGS. 1 to 5, FIG. 1 is a schematic structural view of a dry-wet combined heat exchange device according to an embodiment of the present application; FIG. 2 is a schematic structural view of another dry-wet combined heat exchange de...

Claims

1. A dry-wet combined heat exchange device, comprising a rack, a plate-shaped dry heat exchanger and a plate-shaped wet heat exchanger, whereina placement chamber is formed inside the rack; a first ventilation opening is formed on and runs through a top of the placement chamber in a vertical direction, and a second ventilation opening is formed on and runs through one or more sides of the placement cavity in a horizontal direction;the plate-shaped dry heat exchanger is obliquely arranged in the placement chamber to divide the placement chamber into an upper chamber and a lower chamber, and has an upper plate surface facing the first ventilation opening, and a lower plate surface facing the second ventilation opening or at least one of the second ventilation openings; andthe plate-shaped wet heat exchanger is arranged at the first ventilation opening and / or the second ventilation opening or at least one of the second ventilation openings, and extends in a transverse direction of the ventilation opening.

2. The dry-wet combined heat exchange device according to claim 1, wherein the second ventilation opening or each second ventilation opening is provided at a part of a vertical side wall of the placement chamber facing the lower plate surface of the plate-shaped dry heat exchanger in the horizontal direction.

3. The dry-wet combined heat exchange device according to claim 2, wherein the plate-shaped wet heat exchanger or each plate-shaped wet heat exchanger is arranged at the second ventilation opening.

4. The dry-wet combined heat exchange device according to claim 1, wherein at least one part of the side wall of the placement chamber is provided with a third ventilation opening that is in communication with the lower chamber; and the plate-shaped wet heat exchanger is arranged at the second ventilation opening in communication with the lower chamber.

5. The dry-wet combined heat exchange device according to claim 4, wherein the plate-shaped wet heat exchanger is arranged at the second ventilation opening facing the lower plate surface of the plate-shaped dry heat exchanger in the horizontal direction; and the third ventilation opening is located in the vertical side wall of the placement chamber between the plate-shaped dry heat exchanger and the plate-shaped wet heat exchanger.

6. The dry-wet combined heat exchange device according to claim 5, wherein a fan for accelerating flow of air is provided at at least one of the first ventilation opening, the second ventilation opening and the third ventilation opening.

7. The dry-wet combined heat exchange device according to claim 6, wherein a door is provided at at least one of the first ventilation opening, the second ventilation opening and the third ventilation opening.

8. The dry-wet combined heat exchange device according to claim 4, wherein a fan is provided at each of the first ventilation opening, the third ventilation opening, and the second ventilation opening in communication with the lower chamber;the fans are configured to be independently turned on and off; and the fans are all configured to pump air to the outside, or are all configured to introduce air to the inside; anda door is provided at each of the first ventilation opening, the third ventilation opening, and the second ventilation opening in communication with the lower chamber, the doors are configured to be independently opened and closed.

9. The dry-wet combined heat exchange device according to claim 4, wherein a door with an adjustable opening is arranged at the third ventilation opening.

10. The dry-wet combined heat exchange device according to claim 1, wherein two placement chambers are provided side by side inside the rack, and are communicated with each other;two plate-shaped dry heat exchangers are obliquely placed in the two placement chambers, respectively, jointly forming a V-shaped structure with an upward opening; andparts of side walls of the two placement chambers that are far away from each other are each provided with the second ventilation opening and the plate-shaped wet heat exchanger.

11. The dry-wet combined heat exchange device according to claim 1, wherein a plurality of plate-shaped wet heat exchangers are sequentially arranged side by side in the vertical direction at the second ventilation opening.

12. The dry-wet combined heat exchange device according to claim 11, wherein the plate-shaped wet heat exchangers are a wet-film heat exchanger, a spray heat exchanger or an atomization heat exchanger.

13. The dry-wet combined heat exchange device according to claim 12, wherein, at the second ventilation opening facing the lower plate surface of the plate-shaped dry heat exchanger in the horizontal direction, the plurality of plate-shaped wet heat exchangers are arranged sequentially and inwardly in the vertical direction.

14. The dry-wet combined heat exchange device according to claim 13, wherein a lower end of the upper one of two adjacent plate-shaped wet heat exchangers is overlapped with an upper end of the lower one of the two adjacent plate-shaped wet heat exchangers in the horizontal direction.

15. The dry-wet combined heat exchange device according to claim 14, wherein the plurality of plate-shaped wet heat exchangers arranged side by side in the vertical direction are coupled in parallel.

16. The dry-wet combined heat exchange device according to claim 15, wherein heat-conducting fluid channels in at least one of the plate-shaped wet heat exchangers are connected in series with heat-conducting fluid channels in the plate-shaped dry heat exchanger.

17. The dry-wet combined heat exchange device according to claim 16, wherein the placement chamber is a square chamber or a cylindrical chamber, and the plate-shaped dry heat exchanger is arranged diagonally in the placement chamber.

18. The dry-wet combined heat exchange device according to claim 9, wherein the door comprises a roller shutter door or a sliding door which is controllable electrically.

19. The dry-wet combined heat exchange device according to claim 1, wherein the plate-shaped wet heat exchanger faces the lower plate surface of the plate-shaped dry heat exchanger,a support seat is provided at a bottom of the plate-shaped dry heat exchanger, anda guide slope is provided between the support seat and a bottom of the second ventilation opening where the plate-shaped wet heat exchanger is located, and the guide slope gradually extends upward in a direction close to the plate-shaped dry heat exchanger.

20. The dry-wet combined heat exchange device according to claim 1, wherein the second ventilation openings are provided in both a first side wall and a second side wall of the placement cavity at opposite sides of the plate-shaped dry heat exchanger, andthe plate-shaped wet heat exchanger is arranged at the second ventilation opening in one of the first side wall and the second side wall of the placement cavity.

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