Heat exchange unit

Abstract

The utility model discloses a heat exchange unit, and relates to the technical field of machine room air conditioners. The two rows of heat exchange core bodies are arranged on the rack in parallel in the first direction, and the heat exchange core bodies are obliquely arranged, so that the outdoor air inlet faces and the outdoor air outlet faces of the heat exchange core bodies intersect with the first direction and the second direction, and the second direction is perpendicular to the first direction; the spraying system comprises two spraying devices corresponding to the heat exchange core bodies, and each spraying device comprises a first spraying set located on the outdoor air outlet side of the corresponding heat exchange core body and a second spraying set located on the outdoor air inlet side of the corresponding heat exchange core body; the multiple nozzles of the first spraying set are sequentially arranged in the direction parallel to the outdoor air outlet face, and the multiple nozzles of the second spraying set are sequentially arranged in the direction parallel to the outdoor air inlet face. The spraying mode and the spraying water amount of the spraying system can be adjusted according to different working conditions, so that the unit can better save energy and water under the conditions of different temperatures and humidity.

Description

Technical Field

[0001] This application relates to the field of computer room air conditioning technology, and in particular to a heat exchange unit. Background Technology

[0002] Indirect evaporative cooling units utilize the cooling effect of cooler outdoor air and / or compressor mode to exchange heat with the air inside the machine room, removing heat from the machine room.

[0003] In the process of realizing this utility model, the inventors discovered that the prior art has at least the following problems:

[0004] Existing sprinkler systems cannot effectively control the sprinkler method and sprinkler volume according to different operating conditions. On the one hand, this leads to high water consumption and waste of water resources. On the other hand, it results in poor wet film coverage of the heat exchange core during sprinkler operation, a low effective evaporation area of ​​the heat exchange core, and a high outdoor outlet air temperature of the heat exchange core. This, in turn, leads to an increase in the outdoor outlet air condensation temperature, requiring the air conditioning system to supplement more cooling capacity, resulting in a waste of electricity resources.

[0005] Therefore, in view of the above-mentioned technical problems, how to enable the unit to save water and energy better under different operating conditions is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this application is to provide a heat exchange unit that can adjust the spraying method and spraying water volume of the spraying system according to different operating conditions, so that the unit can better save energy and water under different temperature and humidity conditions.

[0007] To achieve the above objectives, this application provides a heat exchange unit, comprising:

[0008] frame;

[0009] Two rows of heat exchange cores are arranged side by side on the frame along the first direction, and the heat exchange cores are inclined so that the outdoor air inlet and outdoor air outlet of the heat exchange cores intersect with both the first and second directions, and the second direction is perpendicular to the first direction.

[0010] The spray system includes two spray devices respectively corresponding to each of the heat exchange cores. The spray devices include a first spray group located on the outdoor air outlet side of the corresponding heat exchange core and a second spray group located on the outdoor air inlet side of the corresponding heat exchange core.

[0011] In this configuration, multiple nozzles of the first spray group are arranged sequentially along a direction parallel to the outdoor air outlet surface, and multiple nozzles of the second spray group are arranged sequentially along a direction parallel to the outdoor air inlet surface.

[0012] Preferably, a mechanical refrigeration system is further included, which comprises:

[0013] a condenser arranged at the outdoor air outlet side of the chamber, and the first spray group is arranged between the condenser and the heat exchange core;

[0014] an evaporator arranged at the indoor air outlet side of the heat exchange core;

[0015] a compressor connected with the condenser and the evaporator to form a refrigerant circulation loop of the mechanical refrigeration system.

[0016] Preferably, the spray range of the first spray group covers at least the outdoor air outlet surface, and the spray range of the second spray group covers at least the outdoor air inlet surface.

[0017] Preferably, the spray amount and / or arrangement density of each spray head of the first spray group and / or the second spray group gradually increase in the direction from the indoor air outlet side to the indoor air return side of the corresponding heat exchange core.

[0018] Preferably, the spray system further comprises a spray water tank connected with the first spray group and the second spray group through spray water pipes, a spray water pump is arranged on the spray water pipes, and an electromagnetic valve is arranged on the branch of the spray water pipe corresponding to the first spray group and the second spray group.

[0019] Preferably, the mechanical refrigeration system further comprises an indoor air fan arranged at the air outlet side of the evaporator and an outdoor air fan arranged at the air outlet side of the condenser, the indoor air fan is used to send air to the indoor, and the outdoor air fan is used to send air to the outdoor environment.

[0020] Preferably, a water collector is arranged between the heat exchange core and the condenser, and a gas permeable hole is arranged on the water collector.

[0021] Preferably, the spray head sprays the heat exchange core in the form of spray or mist.

[0022] Preferably, the spray devices on the two heat exchange cores are symmetrically arranged, the first spray groups of the two sets of spray devices are communicated, and the second spray groups of the two sets of spray devices are communicated.

[0023] Preferably, the two heat exchange cores are symmetrically distributed.

[0024] Compared with the prior art, the technical scheme provided by the present application has at least the following beneficial effects:

[0025] The two heat exchange cores of the application are arranged side by side along a first direction on the rack, and the heat exchange cores are kept inclined, so that the outdoor air inlet and outlet surfaces of the heat exchange cores intersect with the first direction and the second direction, the first direction can be horizontal, and the second direction is perpendicular to the first direction, that is, the second direction is vertical, and the indoor air and the outdoor air can complete heat exchange in the corresponding inclined channels in the corresponding heat exchange cores. The spray system includes a corresponding spray device corresponding to the heat exchange core, the first spray group of the spray device is located on the outdoor air outlet side, and the second spray group is located on the outdoor air inlet side, a plurality of spray heads of the first spray group are arranged in sequence along a direction parallel to the outdoor air outlet surface, and a plurality of spray heads of the second spray group are arranged in sequence along a direction parallel to the outdoor air inlet surface, so that the first spray group and the second spray group spray into the outdoor air channel in a manner adapted to the inclination of the heat exchange core, thereby improving the heat exchange efficiency of the heat exchange core.

[0026] The application can also control the operation of the spray system according to the temperature and humidity of the outdoor, specifically, when the outdoor temperature is low, the heat exchange of the heat exchange core itself can meet the refrigeration demand, and the outdoor humidity does not need to be considered, so the spray system does not need to be started; when the outdoor temperature rises, the heat exchange capacity of the heat exchange core itself decreases, so the heat exchange capacity of the heat exchange core needs to be increased through the spray system, and considering the influence of the outdoor humidity on the evaporation efficiency of the spray water, at least one of the first spray group and the second spray group can be selectively started according to the size of the outdoor humidity, thereby avoiding the problems of waste of water resources caused by too much spray water and low heat exchange efficiency caused by too little spray water, saving water resources and power resources, and reducing operating costs. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the application, and those skilled in the art can also obtain other drawings according to the provided drawings without creative labor.

[0028] Figure 1 The heat exchange unit structure provided by the embodiments of the application.

[0029] In the figure: 1 - spray water storage tank; 2 - spray water pump; 3 - spray water pipe; 4 - lower electromagnetic valve; 5 - upper electromagnetic valve; 6 - first spray group; 7 - second spray group; 8 - condenser; 9 - outdoor fan; 10 - water collector; 11 - heat exchange core; 12 - evaporator; 13 - indoor fan. DETAILED DESCRIPTION

[0030] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0031] It should be noted that, in the present embodiment, the directions or position relationships indicated by "up", "down", "front", "back" and the like are based on the directions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and thus cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus cannot be understood as limiting the present application. In addition, "first", "second", "third", "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0033] Please refer to Figure 1 In the present embodiment, a heat exchange unit is provided, which comprises a rack, heat exchange cores 11 and a spraying system. Two rows of heat exchange cores 11 are arranged side by side on the rack along a first direction, and the heat exchange cores 11 are arranged obliquely. The first direction can be a horizontal direction, i.e. the two rows of heat exchange cores 11 are arranged side by side in the horizontal direction. The oblique heat exchange cores 11 make the outdoor air inlet and outlet faces of the heat exchange cores 11 intersect with the first direction and a second direction, and the second direction is a vertical direction perpendicular to the first direction. As can be seen, the outdoor air inlet and outlet faces of the heat exchange cores 11 of the present application are not parallel to the horizontal direction, nor are they parallel to the vertical direction, thereby forming an oblique heat exchange core 11 structure. In addition, on the basis of the oblique arrangement, the two heat exchange cores 11 can also be arranged symmetrically.

[0034] There are independent and oblique outdoor air passages and indoor air passages in the heat exchange cores 11, and the outdoor air and the indoor air flow in the corresponding passages and realize heat exchange in the passages. The heat exchange cores 11 arranged in the above manner make the overall air path in the corresponding passages of the outdoor air and the indoor air be basically straight, and there is no other resistance except the resistance of the heat exchange cores 11 themselves, which can effectively reduce the air resistance.

[0035] The spray system comprises two spray devices respectively corresponding to each heat exchange core 11, and the spray device comprises a first spray group 6 located at the outdoor air outlet side of the corresponding heat exchange core 11 and a second spray group 7 located at the outdoor air inlet side of the corresponding heat exchange core 11. As can be seen, the first spray group 6 sprays from top to bottom, and under the premise that the heat exchange core 11 is inclined, the first spray group 6 sprays to the outdoor air channel in an inclined downward manner; similarly, the second spray group 7 sprays to the indoor air channel in an inclined upward manner.

[0036] The plurality of spray heads of the first spray group 6 are arranged in sequence in a direction parallel to the outdoor air outlet surface, and the plurality of spray heads of the second spray group 7 are arranged in sequence in a direction parallel to the outdoor air inlet surface. Since the heat exchange core 11 of the present application is inclined, after the spray water enters the outdoor air channel, it will fall on the channel outer wall of the indoor air channel under the action of gravity, thereby improving the heat exchange efficiency of the indoor air and the outdoor air in the heat exchange core 11. At the same time, since the heat exchange core 11 is inclined, the channel wall of the indoor air channel will also be inclined, and after the spray water contacts the channel wall of the indoor air channel, the inclined characteristics are used to generate a certain resistance to the spray water, avoiding the spray water flowing out of the outdoor air channel in the opposite direction of gravity without resistance, resulting in that the spray water is not fully utilized in the heat exchange core 11, and the heat exchange efficiency of the heat exchange core 11 is reduced.

[0037] Please refer to Figure 1 The heat exchange unit further comprises a mechanical refrigeration system, and the mechanical refrigeration system comprises a condenser 8, an evaporator 12 and a compressor. The condenser 8 is arranged at the outdoor air outlet side, and the first spray group 6 is arranged between the condenser 8 and the heat exchange core 11. The evaporator 12 is arranged at the indoor air outlet side. Among them, the outdoor air outlet side is the inclined upward side of the heat exchange core 11, the indoor air outlet side is the inclined downward side of the heat exchange core 11, and the outdoor air outlet side and the indoor air outlet side are adjacent, and the corresponding outdoor air inlet side and the indoor air return side are adjacent. The compressor is connected with the condenser 8 and the evaporator 12 to form a refrigerant circulation loop of the mechanical refrigeration system. Of course, the mechanical refrigeration system also comprises components such as an electronic expansion valve, which will not be described here.

[0038] On this basis, when the outdoor wind enters the heat exchange core 11, it exchanges heat with the indoor return air in the heat exchange core 11. It should be noted that, due to the existence of the independent outdoor air passage and the outdoor air passage in the heat exchange core 11, the outdoor air enters the outdoor air passage from the outdoor air inlet side and is discharged from the outdoor air outlet side, and then exchanges heat with the condenser 8 (mechanical refrigeration mode), and is discharged to the outdoor environment through the outdoor air fan 9; the indoor return air enters the indoor air passage from the indoor air return side, exchanges heat with the outdoor air in the heat exchange core 11, and is discharged from the indoor air supply side after heat exchange, and then is supplied to the indoor environment through the evaporator 12 and the indoor air fan 13, so the indoor return air and the outdoor inlet air will not mix when they exchange heat in the heat exchange core 11.

[0039] Among them, the first spray group 6 and the second spray group 7 are parallel to the outdoor air outlet surface and the outdoor air inlet surface of the heat exchange core 11 respectively, and one end of the first spray group 6 and the second spray group 7 is close to the indoor air return side, and the other end is close to the indoor air outlet side, so that the spray range of the first spray group 6 covers at least the outdoor air outlet surface, and the spray range of the second spray group 7 covers at least the outdoor air inlet surface, so as to ensure that the spray water can be fully sprayed to the heat exchange core 11, and to avoid the problem of local poor heat exchange efficiency caused by no spray water in the local area.

[0040] In addition, considering that the heat exchange temperature at different positions of the heat exchange core 11 is not uniform during the heat exchange process, it is necessary to make the spray mode and the spray flow of different positions on the first spray group 6 or the second spray group 7 different according to the actual situation; for example, the position close to the indoor air return side of the heat exchange core 11 can increase the amount of spray water due to the high temperature of the indoor return air, so as to increase the heat exchange capacity of the heat exchange core 11 in the area with large temperature difference. Also, the spray amount and / or arrangement density of each nozzle of the first spray group 6 and / or the second spray group 7 gradually increases in the direction from the indoor air outlet side to the indoor air return side of the corresponding heat exchange core 11, so as to meet the heat exchange requirements of the heat exchange core 11 at different positions.

[0041] The above indicates that the spray mode and flow of different positions in the first spray group 6 or the second spray group 7 can be different, and the overall spray mode and spray flow of the first spray group 6 and the second spray group 7 can also be different, for example, the first spray group 6 and the second spray group 7 each include a plurality of nozzles, which spray or spray the heat exchange core 11 in the form of spray, which can be in the form of up and down spray, up spray and down spray, up spray and down spray, up and down spray, etc. Here, it is not repeated, which can be selected according to the actual situation.

[0042] Please refer to Figure 1The spraying system further comprises a spraying water storage tank 1, which is communicated with the first spraying group 6 and the second spraying group 7 through spraying water pipes 3, and a spraying water pump 2 is arranged on the spraying water pipes 3 to provide spraying power; the upper electromagnetic valve 5 and the lower electromagnetic valve 4 are arranged on the corresponding branches of the first spraying group 6 and the second spraying group 7 respectively, which can be used to control the opening and closing of the first spraying group 6 and the second spraying group 7.

[0043] Considering that the spraying device will generate a certain amount of water spray when spraying, in order to avoid the water spray entering the condenser 8, a water collector 10 can be additionally arranged between the heat exchange core 11 and the condenser 8, and the water collector 10 is provided with a gas permeable hole for gas to pass through, so as to ensure that the gas discharged from the outdoor air outlet side can move towards the condenser 8.

[0044] In addition, since the number of heat exchange cores 11 is two, the spraying devices on the two heat exchange cores 11 can be symmetrically arranged, and the first spraying groups 6 of the two groups of spraying devices are communicated, and the second spraying groups 7 of the two groups of spraying devices are communicated, so as to ensure that the spraying modes and the spraying water amounts of the two heat exchange cores 11 are substantially consistent.

[0045] In the use process of the unit, the preset first switching point temperature and second switching point temperature can be obtained first, and the second switching point temperature is greater than the first switching point temperature; wherein the first switching point temperature is a preset temperature when the unit switches to a dry mode, which can be taken as a value between 0-10℃; the second switching point temperature is a preset temperature when the unit switches to a mixed mode, which can be taken as a value between 25-30℃. The first and second switching point temperatures are temperatures set by technicians according to actual conditions, including but not limited to the temperature ranges given above, which can be obtained through multiple tests, so as to obtain more accurate switching point temperatures.

[0046] Secondly, if the current target outdoor dry-bulb temperature is less than the first switching point temperature, it indicates that the outdoor temperature is low, and the heat exchange core 11 can meet the refrigeration demand by relying on its own heat exchange, so the spraying system and the mechanical refrigeration system in the heat exchange unit can be closed. The dry-bulb temperature is the temperature measured by a thermometer freely exposed to the air, i.e. the current outdoor temperature.

[0047] Then, if the target outdoor dry bulb temperature is greater than the first switching point temperature, it indicates that the outdoor temperature is high, and the heat exchange amount of the heat exchange core 11 itself is reduced. On this basis, it is further determined whether the current target outdoor wet bulb temperature is greater than or equal to the first switching point temperature. The purpose of determining the target outdoor wet bulb temperature and the first switching point temperature is to determine whether the outdoor humidity will reduce the evaporation efficiency of the spray water. If the target outdoor wet bulb temperature is greater than or equal to the first switching point temperature and less than the preset second switching point temperature, it indicates that the outdoor humidity has affected the evaporation efficiency of the spray water, and therefore the spray system needs to be started to increase the amount of spray water for the heat exchange core 11, thereby making up for the reduction in refrigerating capacity caused by the reduction in the heat exchange amount of the heat exchange core 11 itself.

[0048] When the target outdoor wet bulb temperature is in the interval between the first switching point temperature and the second switching point temperature, the heat exchange core 11 still has heat exchange capacity at this time, but the outdoor humidity has affected the evaporation efficiency of the spray water. Therefore, it is further determined in which temperature interval between the first switching point temperature and the second switching point temperature the target outdoor wet bulb temperature is located, that is, there are multiple temperature intervals between the first switching point temperature and the second switching point temperature. The different temperature intervals in which the target outdoor wet bulb temperature is located reflect different outdoor humidities, and therefore at least one of the second spray group 7 and the first spray group 6 of the spray system can be controlled according to the temperature interval to adjust the amount of spray water and the spray mode for the heat exchange core 11.

[0049] Among them, the spray mode is reflected in the separate start of the second spray group 7, the separate start of the first spray group 6, and the simultaneous start of the first spray group 6 and the second spray group 7; the amount of spray water is also reflected in the above three modes, the amount of spray water is less when the second spray group 7 is started alone, the amount of water is increased when the first spray group 6 is started alone, and the amount of spray water is the most when the first spray group 6 and the second spray group 7 are started simultaneously.

[0050] It should be pointed out that in actual application, the dry bulb temperature is usually greater than or equal to the wet bulb temperature, and the heat exchange unit generally has the following operating modes:

[0051] When the outdoor temperature is low, the target outdoor dry bulb temperature is < the first switching point temperature at this time, and the unit operates in dry mode;

[0052] When the outdoor temperature is equivalent to the computer room temperature, the target outdoor dry bulb temperature is greater than the first switching point temperature at this time, and the first switching point temperature ≤ the target outdoor wet bulb temperature < the second switching point temperature, and the unit operates in wet mode;

[0053] When the outdoor temperature is higher than the computer room temperature, the target outdoor wet bulb temperature ≥ the second switching point temperature at this time, and the unit operates in mixed mode.

[0054] When the unit operates in the dry mode, the spray system and the mechanical refrigeration system are controlled to be closed. Since the outdoor temperature is low, the heat exchange unit can meet the refrigeration demand by relying on the heat exchange between the heat exchange core 11 and the outdoor cold air. When the unit operates in the wet mode, the spray system is controlled to operate and the mechanical refrigeration system is controlled to be closed. Since the indoor and outdoor temperatures are roughly equivalent, the heat exchange between the heat exchange core 11 and the outdoor air cannot meet the refrigeration demand, and therefore the spray system needs to be increased to increase the heat exchange amount of the heat exchange core 11. When the unit operates in the mixed mode, the spray system and the mechanical refrigeration system are controlled to be turned on. Since the outdoor temperature is high, the spray system cannot meet the refrigeration demand of the heat exchange core 11, and therefore the mechanical refrigeration system needs to be increased to meet the refrigeration demand.

[0055] The above-mentioned "controlling at least one of the second spray group 7 and the first spray group 6 to be turned on according to the temperature interval" includes:

[0056] If the target outdoor wet-bulb temperature is in the first preset temperature interval in the temperature interval, the second spray group 7 is turned on and the first spray group 6 is turned off.

[0057] If the target outdoor wet-bulb temperature is in the third preset temperature interval in the temperature interval, the second spray group 7 is turned off and the first spray group 6 is turned on.

[0058] If the target outdoor wet-bulb temperature is in the second preset temperature interval in the temperature interval, the second spray group 7 is turned on and the first spray group 6 is turned on.

[0059] The temperature interval includes a first preset temperature interval close to the first switching point temperature, a second preset temperature interval close to the second switching point temperature, and a third preset temperature interval between the first preset temperature interval and the second preset temperature interval.

[0060] When the target outdoor wet-bulb temperature is in the first preset temperature interval, it means that the target outdoor wet-bulb temperature is close to the first switching point temperature. In this case, the air is drier as the target outdoor wet-bulb temperature is smaller under the condition that the target outdoor dry-bulb temperature is constant, and the spray water evaporation efficiency of the heat exchange core 11 is high. Therefore, only the second spray group 7 needs to be turned on to meet the heat exchange demand of the heat exchange core 11.

[0061] When the target outdoor wet-bulb temperature is in the third preset temperature interval, it means that the target outdoor wet-bulb temperature is rising. In this case, the air humidity increases, and the spray water evaporation efficiency of the heat exchange core 11 decreases. Therefore, by turning on the first spray group 6 and turning off the second spray group 7, the spray water amount and the wet film coverage efficiency of the heat exchange core 11 can be increased to meet the heat exchange demand of the heat exchange core 11.

[0062] When the target outdoor wet-bulb temperature is in the second preset temperature interval, it is indicated that the target outdoor wet-bulb temperature is close to the second switching point temperature, at this time, the target outdoor wet-bulb temperature is too high, the air humidity is further increased, and the evaporation efficiency of the spray water of the heat exchange core 11 is further reduced, so that the spray water amount and the wet film covering efficiency of the heat exchange core 11 are further increased by simultaneously opening the first spray group 6 and the second spray group 7, so as to meet the heat exchange requirement of the heat exchange core 11.

[0063] The above indicates that the target outdoor wet-bulb temperature is in the interval between the first switching point temperature and the second switching point temperature, so there is also a target outdoor wet-bulb temperature greater than or equal to the second switching point temperature, that is, the unit is in a mixed mode, at this time, on the basis of opening the spray system, the mechanical refrigeration system also needs to be opened to meet the refrigeration capacity of the unit.

[0064] When the wet-bulb temperature is greater than or equal to the second switching point temperature, it is indicated that the outdoor temperature is too high, and the heat exchange capacity of the heat exchange core 11 itself is seriously insufficient, or even loses the heat exchange function, so the mechanical refrigeration system needs to be increased to meet the refrigeration capacity of the unit.

[0065] Specifically, if the target outdoor wet-bulb temperature is greater than or equal to the second switching point temperature, the mechanical refrigeration system is opened; and at least one of the second spray group 7 and the first spray group 6 is opened according to the condensing temperature of the mechanical refrigeration system.

[0066] Among them, at least one of the second spray group 7 and the first spray group 6 is opened according to the condensing temperature of the mechanical refrigeration system, including:

[0067] If the target outdoor wet-bulb temperature is in the first preset condensing temperature interval, the second spray group 7 is opened, and the first spray group 6 is closed;

[0068] If the target outdoor wet-bulb temperature is in the second preset condensing temperature interval, the second spray group 7 is opened, and the first spray group 6 is opened;

[0069] Among them, the temperature value in the second preset condensing temperature interval is greater than the temperature value in the first preset condensing temperature interval, that is, when the condensing temperature (pressure) of the mechanical refrigeration system is low, only the second spray group 7 can be opened to meet the refrigeration requirement of the unit, but in the case of only opening the second spray group 7, the outdoor air outlet temperature of the heat exchange core 11 is high due to no water covering on the upper end of the heat exchange core 11, which causes the condensing temperature (pressure) to rise, so that the mechanical refrigeration system needs to supplement more cooling capacity. With the further increase of the condensing temperature (pressure), the first spray group 6 and the second spray group 7 can be opened at the same time to cool the air entering the condenser 8.

[0070] In addition, when the unit has water-saving requirements, the opening of the first spray group 6 and the second spray group 7 can be selected according to the condensing temperature (pressure), the outdoor temperature and humidity, and the refrigeration requirements.

[0071] It can be seen that the control method combines the first spray group 6 and the second spray group 7, and effectively controls the first spray group 6 and the second spray group 7 according to different working conditions of the unit, increases the spraying efficiency, meets the refrigeration requirements of the unit, and makes the unit better save energy and water, reduce operating costs, and better save energy and water under different seasons and load conditions.

[0072] It should be noted that in the present specification, the relationship terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between the entities.

[0073] The principles and implementation modes of the present application are described by applying specific examples herein, and the above description of the examples is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A heat exchanging unit, characterized by, The application relates to a heat exchange device, which comprises the following parts: a rack; two rows of heat exchange cores (11), which are arranged on the rack in parallel along a first direction, and the heat exchange cores (11) are arranged obliquely so that the outdoor air inlet and outlet surfaces of the heat exchange cores (11) intersect with the first direction and a second direction, and the second direction is perpendicular to the first direction; a spraying system, which comprises two spraying devices arranged respectively corresponding to each heat exchange core (11), and the spraying device comprises a first spraying group (6) arranged on the outdoor air outlet side of the corresponding heat exchange core (11) and a second spraying group (7) arranged on the outdoor air inlet side of the corresponding heat exchange core (11); wherein the multiple nozzles of the first spraying group (6) are arranged in sequence along a direction parallel to the outdoor air outlet surface, and the multiple nozzles of the second spraying group (7) are arranged in sequence along a direction parallel to the outdoor air inlet surface.

2. The heat exchanging unit according to claim 1, wherein The heat exchange device further comprises a mechanical refrigeration system, which comprises: a condenser (8) arranged on the outdoor air outlet side, the first spraying group (6) is arranged between the condenser (8) and the heat exchange core (11); an evaporator (12) arranged on the indoor air outlet side of the heat exchange core (11); a compressor connected with the condenser (8) and the evaporator (12) to form a refrigerant circulation loop of the mechanical refrigeration system.

3. The heat exchanging unit according to claim 2, wherein The spraying range of the first spraying group (6) covers at least the outdoor air outlet surface, and the spraying range of the second spraying group (7) covers at least the outdoor air inlet surface.

4. The heat exchanging unit according to claim 3, wherein The spraying amount and / or arrangement density of each nozzle of the first spraying group (6) and / or the second spraying group (7) gradually increase in the direction from the indoor air outlet side to the indoor air return side of the corresponding heat exchange core (11).

5. The heat exchanging unit according to claim 1, wherein The spraying system further comprises a spraying water storage tank (1), the spraying water storage tank (1) is connected with the first spraying group (6) and the second spraying group (7) through spraying water pipes (3), a spraying water pump (2) is arranged on the spraying water pipe (3), and an electromagnetic valve is arranged on the branch of the spraying water pipe (3) corresponding to the first spraying group (6) and the second spraying group (7).

6. The heat exchanging unit according to claim 2, wherein The mechanical refrigeration system further comprises an indoor fan arranged on the evaporator outlet side and an outdoor fan (9) arranged on the condenser (8) outlet side, the indoor fan is used for sending indoor air, and the outdoor fan (9) is used for sending outdoor air.

7. The heat exchanging unit according to claim 2, wherein A water collector (10) is arranged between the heat exchange core (11) and the condenser (8), and a gas permeable hole is arranged on the water collector (10).

8. The heat exchanging unit according to claim 1, wherein The nozzles spray the heat exchange core (11) in the form of spraying or atomizing.

9. The heat exchanging unit according to claim 1, wherein The spraying devices on the two heat exchange cores (11) are symmetrically arranged, the first spraying groups (6) of the two groups of spraying devices are communicated, and the second spraying groups (7) of the two groups of spraying devices are communicated.

10. The heat exchanging unit of claim 1, wherein The two heat exchange cores (11) are symmetrically distributed.

Images