Indirect evaporative unit and anti-condensation control method thereof

Abstract

This application relates to the field of refrigeration equipment technology, and in particular to an indirect evaporator unit and its anti-condensation control method. The indirect evaporator unit includes a shell and a core disposed within the shell, an exhaust air zone, a fresh air zone, a return air zone, and a supply air zone connected to the core; and a control system. The exhaust air zone is equipped with at least two exhaust fans, a first exhaust fan and a second exhaust fan. At least two independent exhaust channels, a first exhaust channel and a second exhaust channel, are provided between the exhaust air zone and one side of the core. The first exhaust channel is connected at both ends to the core and the first exhaust fan, respectively, and the second exhaust channel is connected at both ends to the core and the second exhaust fan, respectively. The anti-condensation control method includes, when the fresh air temperature inside the indirect evaporator unit is lower than the return air dew point temperature, the control system activates the anti-condensation mode, turning on the first exhaust fan and turning off the second exhaust fan, or vice versa. This solves the technical problem of condensation, frost, and icing easily occurring inside the indirect evaporator unit.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, and in particular to an indirect evaporator unit and its anti-condensation control method. Background Technology

[0002] Indirect evaporation units are mostly used in northwestern my country, where the air is dry, especially in winter when the temperature is even lower. At this time, the outdoor temperature is easily lower than the indoor dew point temperature, and the indoor primary air is prone to condensation in the primary channel of the indirect evaporation unit. If not dealt with in time, as the outdoor temperature gradually decreases, local structures inside the indirect evaporation unit may even experience frost or ice formation, leading to blockage of the dry channel inside the unit. Summary of the Invention

[0003] The purpose of this application is to provide an indirect evaporator unit and its anti-condensation control method to solve the technical problems of condensation, frost, and icing that easily occur in existing indirect evaporator units.

[0004] Firstly, the indirect evaporation unit provided in this application includes:

[0005] A housing; and a core disposed within the housing; an exhaust air zone and a fresh air zone disposed within the housing and respectively disposed on opposite sides of the core and connected to the core; a return air zone and a supply air zone disposed within the housing and connected to the core; and a control system electrically connected to the core, the exhaust air zone, the fresh air zone, the return air zone, and the supply air zone;

[0006] The exhaust vent of the exhaust zone is located on the side wall of the housing. At least two exhaust fans are provided in the exhaust zone, namely at least a first exhaust fan and a second exhaust fan. An exhaust channel is provided between the exhaust zone and one side of the core, which is divided into at least two independent first exhaust channels and second exhaust channels. The two ends of the first exhaust channel are respectively connected to the core and the first exhaust fan, and the two ends of the second exhaust channel are respectively connected to the core and the second exhaust fan.

[0007] When the control system is switched to the anti-condensation mode, the control system turns on the first exhaust fan and turns off the second exhaust fan, or turns on the second exhaust fan and turns off the first exhaust fan.

[0008] Furthermore, the exhaust duct is divided into at least two independent exhaust ducts by an exhaust baffle, namely the first exhaust duct and the second exhaust duct.

[0009] Furthermore, the first exhaust fan and the second exhaust fan are arranged side by side in a transverse direction; or

[0010] The first exhaust fan and the second exhaust fan are arranged in a longitudinally aligned manner.

[0011] Furthermore, the exhaust area is equipped with multiple exhaust fans, each of which is arranged in multiple rows and columns along the horizontal and vertical directions at intervals; when the anti-condensation mode is activated, at least one of the exhaust fans is turned off.

[0012] Furthermore, the exhaust area is provided with two rows and two columns of four exhaust fans, namely a first exhaust fan, a second exhaust fan, a third exhaust fan, and a fourth exhaust fan, along both the horizontal and vertical directions. The first and second exhaust fans are arranged side by side in the first row, and the third and fourth exhaust fans are arranged side by side in the second row. The first and second rows are aligned vertically, and the first and third exhaust fans are aligned vertically, as are the second and fourth exhaust fans.

[0013] When the first exhaust fan and the second exhaust fan are turned off, and the third exhaust fan and the fourth exhaust fan are turned on, the exhaust airflow forms an up-and-down circulation pattern inside the core.

[0014] When the first and third exhaust fans are turned off, and the second and fourth exhaust fans are turned on, the exhaust airflow forms a left-right circulation pattern inside the core.

[0015] Furthermore, each of the aforementioned exhaust fans is mounted on an exhaust fan wall; and / or

[0016] A temperature and humidity probe is installed in the fresh air zone to sense the air temperature in the fresh air zone, and the temperature and humidity probe is electrically connected to the control system.

[0017] Furthermore, the side of the core is formed by four side walls that are connected in pairs around each other, namely a first side wall, a second side wall, a third side wall and a fourth side wall. The first side wall and the second side wall are arranged opposite each other, and the third side wall and the fourth side wall are arranged opposite each other.

[0018] The exhaust zone is connected to the first side wall through the exhaust duct, the fresh air zone is connected to the second side wall, the return air zone is connected to the third side wall, and the supply air zone is connected to the fourth side wall.

[0019] Furthermore, the core is inclined along a horizontal plane within the housing, and the exhaust zone, return air zone, fresh air zone, and supply air zone each occupy a corner of the housing and are arranged sequentially around the side of the core, thus partitioning the remaining space inside the housing excluding the space occupied by the core; or

[0020] The core is arranged horizontally or vertically within the housing. The exhaust zone, return air zone, fresh air zone, and supply air zone are arranged sequentially around the side of the core, occupying the remaining space inside the housing excluding the space occupied by the core.

[0021] Secondly, this application provides an anti-condensation control method, which utilizes the indirect evaporator unit described in any of the foregoing claims, wherein the anti-condensation control method includes:

[0022] Step 100: Turn on the indirect evaporator unit;

[0023] Step 200: When the temperature sensing device connected to the control system in the indirect evaporator unit senses that the temperature of the fresh air entering the fresh air zone is lower than the dew point temperature of the return air in the return air zone, the control system controls the adjustment to activate the anti-condensation mode.

[0024] Step 300: When the anti-condensation mode is activated, the control system controls the first exhaust fan to turn on and the second exhaust fan to turn off, or turns on the second exhaust fan and turns off the first exhaust fan.

[0025] Furthermore, when the exhaust area is provided with two rows and two columns of four exhaust fans, namely a first exhaust fan, a second exhaust fan, a third exhaust fan and a fourth exhaust fan, respectively, the first exhaust fan and the second exhaust fan are arranged side by side in the first row, the third exhaust fan and the fourth exhaust fan are arranged side by side in the second row, the first row and the second row are aligned vertically, and the first exhaust fan and the third exhaust fan are aligned vertically, and the second exhaust fan and the fourth exhaust fan are aligned vertically;

[0026] When the anti-condensation mode is activated, it includes:

[0027] Step 301: Turn off the first and second exhaust fans, and turn on the third and fourth exhaust fans to activate the exhaust airflow circulation mode inside the core; or

[0028] Step 302: Turn off the first and third exhaust fans, and turn on the second and fourth exhaust fans to activate the exhaust airflow circulation mode within the core.

[0029] Compared with the prior art, the indirect evaporator unit and its anti-condensation control method provided in this application are equipped with at least two exhaust fans in the exhaust zone of the indirect evaporator unit, and each is independently connected to the core through its own exhaust channel. When the temperature of the fresh air entering the fresh air zone is lower than the dew point temperature of the return air in the return air zone, the control system adjusts to activate the anti-condensation mode, turning on the first exhaust fan and turning off the second exhaust fan, or turning on the second exhaust fan and turning off the first exhaust fan, or turning on one exhaust fan and turning off the other. For ease of explanation, this is illustrated by turning on the first exhaust fan and turning off the second exhaust fan. When the first exhaust fan is turned on, a portion of the high-temperature exhaust air from the first exhaust fan is discharged from the exhaust port of the exhaust zone. At the same time, because the first exhaust fan is turned on and the second exhaust fan is turned off in the same exhaust zone, due to the static pressure in the exhaust zone, the first exhaust fan... Another portion of the high-temperature exhaust air flows back into the second exhaust duct from the air inlet of the second exhaust fan, simultaneously pushing the high-temperature exhaust air that has not yet been discharged from the second exhaust duct back into the core. At the same time, since the air in the exhaust zone is under positive pressure and the air in the fresh air zone is under negative pressure, the aforementioned high-temperature exhaust air that has returned to the core enters the fresh air zone and mixes with the fresh air a second time. The temperature of the mixed secondary fresh air is greatly increased, and it re-enters the core, allowing the exhaust air to achieve a stable heat exchange cycle between the cores, achieving the goal of raising the temperature of the secondary fresh air entering the core. Ultimately, the fresh air entering the core will be higher than the dew point temperature of the indoor return air, effectively preventing condensation of the primary air. When the temperature of the secondary fresh air entering the fresh air zone is equal to or higher than the dew point temperature of the indoor return air in the return air zone, the anti-condensation mode can be automatically turned off, returning to the normal operating mode.

[0030] This design of the indirect evaporator unit and its anti-condensation control method effectively solves the technical problems of condensation, frost, and ice formation that easily occur in existing indirect evaporator units. It effectively prevents condensation of primary air and localized frost and ice formation within the indirect evaporator unit. Taking advantage of the low winter temperatures, the fact that the equipment does not require a rated exhaust volume, and the ability to reuse some high-temperature exhaust air, the above-mentioned technical problems can be solved simply by controlling the on / off switching of exhaust fans at different locations. The operation is simple, easy to implement, and highly feasible. Moreover, the entire process not only does not damage the core, but also prevents damage to the core caused by excessively low fresh air temperature, extends the service life of the core, and delays the decline in the core's heat exchange efficiency. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of the indirect evaporator unit provided in the embodiments of this application;

[0033] Figure 2 This is a schematic diagram showing the installation location of an exhaust fan according to one embodiment of this application.

[0034] Figure label:

[0035] 100 - Housing;

[0036] 10-Core;

[0037] 11-First sidewall;

[0038] 12-Second sidewall;

[0039] 13-Third sidewall;

[0040] 14 - Fourth sidewall;

[0041] 20 - Exhaust area;

[0042] 211 - First row of fans;

[0043] 212 - Second exhaust fan;

[0044] 213 - Third row of fans;

[0045] 214 - Fourth exhaust fan;

[0046] 22-Exhaust box;

[0047] 23 - Exhaust vent;

[0048] 24-Exhaust fan wall;

[0049] 31 - First exhaust duct;

[0050] 32 - Second exhaust duct;

[0051] 40 - Exhaust baffle;

[0052] 50 - Fresh Air Zone;

[0053] 60 - Return air zone;

[0054] 61-Blower;

[0055] 70 - Air supply area. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0057] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0058] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0059] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0060] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0061] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0062] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0063] like Figure 1 As shown, this application provides an indirect evaporator unit, which includes a housing 100 and a core 10 disposed within the housing 100, as well as an exhaust zone 20, a fresh air zone 50, a return air zone 60, and a supply air zone 70 located within the housing 100 and communicating with the core 10. The exhaust zone 20 and the fresh air zone 50 are respectively disposed on opposite sides of the core 10, and preferably the return air zone 60 and the supply air zone 70 are respectively disposed on the other side of the core 10. On both sides, the exhaust vent 23 of the exhaust zone 20, the fresh air inlet of the fresh air zone 50, the return air inlet of the return air zone 60, and the air outlet of the supply air zone 70 are respectively disposed on the side wall of the adjacent housing 100. The indirect evaporator unit also includes a control system electrically connected to the aforementioned core 10, exhaust zone 20, fresh air zone 50, return air zone 60, and supply air zone 70. The control system can control the opening and closing of the devices in the aforementioned areas of the indirect evaporator unit.

[0064] At least two exhaust fans are installed in the aforementioned exhaust zone 20, namely at least a first exhaust fan 211 and a second exhaust fan 212. An exhaust channel is provided between the exhaust zone 20 and one side of the aforementioned core 10. This exhaust channel is divided into at least two independent first exhaust channels 31 and second exhaust channels 32. The two ends of the first exhaust channel 31 are connected to the core 10 and the first exhaust fan 211, respectively, and the two ends of the second exhaust channel 32 are connected to the core 10 and the second exhaust fan 212, respectively. Specifically, the exhaust channel can be divided into at least two independent exhaust channels by installing an exhaust baffle 40. This method only requires a baffle in the exhaust channel between the exhaust fan and the core, resulting in extremely low cost and easy implementation. The aforementioned control system can control the opening and closing of each exhaust fan in the exhaust zone 20. Figure 1 As shown, the arrows indicate the direction of airflow.

[0065] This application also provides a method for preventing condensation control using the aforementioned indirect evaporator unit, the method comprising the following steps:

[0066] Step 100: Turn on the indirect evaporator unit to operate, specifically to put it into normal operating mode;

[0067] Step 200: When the temperature sensing device connected to the control system detects that the temperature of the fresh air entering the fresh air zone 50 is lower than the dew point temperature of the return air in the return air zone 60, the control system adjusts the setting to activate the anti-condensation mode.

[0068] Step 300: When the anti-condensation mode is activated, the control system controls the first exhaust fan 211 to turn on and the second exhaust fan 212 to turn off, or the control system controls the second exhaust fan 212 to turn on and the first exhaust fan 211 to turn off.

[0069] Compared with the prior art, the indirect evaporator unit and its anti-condensation control method provided in this application embodiment are equipped with at least two exhaust fans in the exhaust zone 20 of the indirect evaporator unit, at least a first exhaust fan 211 and a second exhaust fan 212, and are independently connected to the core 10 through their respective exhaust channels (first exhaust channel 31 and second exhaust channel 32). When the temperature of the fresh air entering the fresh air zone 50 is lower than the return air dew point temperature of the return air zone 60, the control system in the indirect evaporator unit adjusts and activates the anti-condensation module. The method involves turning on the first exhaust fan 211 and turning off the second exhaust fan 212, or turning on the second exhaust fan 212 and turning off the first exhaust fan 211. In other words, one exhaust fan is turned on and the other is turned off. For ease of explanation, this example uses turning on the first exhaust fan 211 and turning off the second exhaust fan 212. After activating the anti-condensation mode, the first exhaust fan 211 is turned on, and a portion of the high-temperature exhaust air from the first exhaust fan 211 can be discharged from the exhaust port 23 of the exhaust zone 20. Simultaneously, due to the presence of the first exhaust fan within the same exhaust zone 20 space... When fan 211 is turned on and the second exhaust fan 212 is turned off, due to the static pressure in the exhaust zone, another portion of the high-temperature exhaust air from the first exhaust fan 211 will flow back into the second exhaust duct 32 from the air inlet of the second exhaust fan 212, simultaneously pushing the high-temperature exhaust air that has not yet been discharged from the second exhaust duct 32 back into the core 10. At the same time, because the air in the exhaust zone 20 is under positive pressure and the air in the fresh air zone 50 is under negative pressure, the aforementioned high-temperature exhaust air that has flowed back into the core 10 enters the fresh air zone 50 and mixes with the fresh air. The secondary mixing process significantly increases the temperature of the secondary fresh air, which then re-enters the core 10. This allows the exhaust air to achieve a stable heat exchange cycle within the core 10, resulting in an increase in the temperature of the secondary fresh air entering the core 10. Ultimately, the fresh air entering the core 10 will be higher than the dew point temperature of the indoor return air, effectively preventing condensation on the primary air. When the temperature of the secondary fresh air entering the fresh air zone 50 after secondary mixing is equal to or higher than the dew point temperature of the indoor return air in the return air zone 60, the anti-condensation mode can be automatically shut off, returning to the normal operating mode.

[0070] This design of the indirect evaporator unit and its anti-condensation control method effectively solves the technical problems of condensation, frost, and ice formation that easily occur in existing indirect evaporator units. It effectively prevents condensation of primary air and localized frost and ice formation within the indirect evaporator unit. Furthermore, it takes advantage of the low winter temperatures, eliminating the need for a rated exhaust volume and allowing for the reuse of some high-temperature exhaust air. The aforementioned technical problems can be solved simply by controlling the on / off switching of exhaust fans at different locations. The operation is simple, easy to implement, and highly feasible. Moreover, the entire process not only does not damage the core but also prevents damage to the core caused by excessively low fresh air temperatures, extending the core's service life and delaying the decline in the core's heat exchange efficiency.

[0071] Furthermore, the aforementioned first exhaust fan 211 and second exhaust fan 212 can be arranged side-by-side in the horizontal direction. This allows one exhaust fan to be turned on and the other off when the anti-condensation mode is activated, enabling the exhaust airflow to circulate horizontally within the core 10. Alternatively, the first exhaust fan 211 and second exhaust fan 212 can be aligned vertically. This allows one exhaust fan to be turned on and the other off when the anti-condensation mode is activated, enabling the exhaust airflow to circulate vertically within the core 10. This allows for better control of the heat exchange circulation of the high-temperature exhaust air within the core 10 as needed.

[0072] Furthermore, multiple exhaust fans can be installed in the aforementioned exhaust zone 20, with each exhaust fan arranged in multiple rows and columns along the horizontal and vertical directions at intervals. When the anti-condensation mode is activated, at least one exhaust fan is turned off, forming a high-temperature exhaust airflow that circulates within the core 10, thereby achieving the purpose of raising the air temperature in the fresh air zone.

[0073] like Figure 1 and Figure 2As shown, in a specific embodiment, the aforementioned exhaust zone 20 may be provided with two rows and two columns of four exhaust fans along the horizontal and vertical directions, namely a first exhaust fan 211, a second exhaust fan 212, a third exhaust fan 213, and a fourth exhaust fan 214. The first exhaust fan 211 and the second exhaust fan 212 are arranged side by side in the first row, and the third exhaust fan 213 and the fourth exhaust fan 214 are arranged side by side in the second row. The first row and the second row are aligned vertically, and the first exhaust fan 211 and the third exhaust fan 213 are aligned vertically, and the second exhaust fan 212 and the fourth exhaust fan 214 are aligned vertically. Thus, when the anti-condensation mode is activated, if the first exhaust fan 211 and the second exhaust fan 212 are turned off, and the third exhaust fan 213 and the fourth exhaust fan 214 are turned on, the exhaust airflow forms an up-and-down circulation pattern inside the core 10; if the first exhaust fan 211 and the third exhaust fan 213 are turned off, and the second exhaust fan 212 and the fourth exhaust fan 214 are turned on, the exhaust airflow forms a left-right circulation pattern inside the core 10. This allows for better control of the heat exchange circulation of the high-temperature exhaust air within the core 10 as needed, so as to more quickly achieve the goal of ensuring that the air temperature in the fresh air zone 50 is equal to or higher than the dew point temperature of the indoor return air in the return air zone 60.

[0074] Correspondingly, a further anti-condensation control method includes: when the anti-condensation mode is activated, step 301: turn off the first exhaust fan 211 and the second exhaust fan 212, and turn on the third exhaust fan 213 and the fourth exhaust fan 214, starting the exhaust airflow in a vertical circulation mode within the core 10; or step 302: turn off the first exhaust fan 211 and the third exhaust fan 213, and turn on the second exhaust fan 212 and the fourth exhaust fan 214, starting the exhaust airflow in a horizontal circulation mode within the core 10. This allows for better control of the heat exchange circulation of the high-temperature exhaust air within the core 10 as needed, so as to more quickly achieve the goal of the air temperature in the fresh air zone 50 being equal to or higher than the dew point temperature of the indoor return air in the return air zone 60.

[0075] Another specific embodiment is that, in order to better sense the air temperature after the fresh air and the high-temperature exhaust air are mixed in the fresh air zone 50, a temperature and humidity probe can be installed in the fresh air zone 50. This probe is electrically connected to the control system so that the control system can obtain the air temperature information in the fresh air zone 50 at any time. Furthermore, an exhaust fan wall 24 can be installed in the exhaust air zone 20, and each exhaust fan can be installed on this exhaust fan wall 24. Additionally, a number of supply fans 61 can be installed in the return air zone 60. Furthermore, the aforementioned exhaust air zone 20 can be placed entirely within an exhaust box 22, which can house the aforementioned number of exhaust fans. An exhaust port 23 can be provided on the side of the exhaust box 22 adjacent to the housing 100.

[0076] A more specific embodiment is, as Figure 1As shown, the side of the aforementioned core 10 can be formed by four opposing side walls connected in sequence, namely the first side wall 11, the second side wall 12, the third side wall 13, and the fourth side wall 14. The first side wall 11 and the second side wall 12 are arranged opposite each other, and the third side wall 13 and the fourth side wall 14 are arranged opposite each other. The aforementioned exhaust zone 20 can be connected to the first side wall 11 of the core 10 through an exhaust channel. The aforementioned fresh air zone 50 is connected to the second side wall 12 of the core 10 and is connected to the core 10. The aforementioned return air zone 60 is connected to the third side wall 13 of the core 10 and is connected to the core 10. The aforementioned supply air zone 70 is connected to the fourth side wall 14 of the core 10 and is connected to the core 10. That is, the exhaust zone 20 and the fresh air zone 50 are respectively arranged on opposite sides of the core 10, and the return air zone 60 and the supply air zone 70 are respectively arranged on the other opposite sides of the core 10.

[0077] Furthermore, the aforementioned core 10 is inclinedly arranged on a horizontal plane within the housing 100. The aforementioned exhaust zone 20, return air zone 60, fresh air zone 50, and supply air zone 70 each occupy a corner of the housing 100 and are arranged sequentially around the side of the core 10, thus occupying the remaining space within the housing 100 excluding the space occupied by the core 10. Alternatively, the core 10 is arranged horizontally or vertically within the housing 100, with the exhaust zone 20, return air zone 60, fresh air zone 50, and supply air zone 70 arranged sequentially around the side of the core 10, thus occupying the remaining space within the housing 100 excluding the space occupied by the core 10. This arrangement maximizes the utilization of the internal space of the housing 100 without interference between the zones.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An indirect evaporation unit, characterized in that, include: case; and the core disposed within the housing; An exhaust air zone and a fresh air zone are disposed within the housing and respectively disposed on opposite sides of the core and connected to the core; a return air zone and a supply air zone are disposed within the housing and connected to the core; and a control system electrically connected to the core, the exhaust air zone, the fresh air zone, the return air zone and the supply air zone; The exhaust vent of the exhaust zone is located on the side wall of the housing. At least two exhaust fans are provided in the exhaust zone, including at least a first exhaust fan and a second exhaust fan. An exhaust channel is provided between the exhaust zone and one side of the core. The exhaust channel is divided into two independent exhaust channels, a first exhaust channel and a second exhaust channel, by an exhaust baffle. The two ends of the first exhaust channel are connected to the core and the first exhaust fan, respectively. The two ends of the second exhaust channel are connected to the core and the second exhaust fan, respectively. When the control system is switched to the anti-condensation mode, it turns on one of the first and second exhaust fans and turns off the other. A portion of the high-temperature exhaust air from the turned-on exhaust fan is discharged from the exhaust port of the exhaust zone, while another portion of the high-temperature exhaust air flows back into the exhaust channel connected to the turned-off exhaust fan from the air inlet. This pushes the high-temperature exhaust air that has not yet been discharged from the exhaust channel back into the core. At the same time, the high-temperature exhaust air that flows back into the core enters the fresh air zone and mixes with the fresh air for a second time. The temperature of the mixed secondary fresh air rises and it re-enters the core.

2. The indirect evaporator unit according to claim 1, characterized in that, The first exhaust fan and the second exhaust fan are arranged side by side in a transverse direction; or The first exhaust fan and the second exhaust fan are arranged in a longitudinally aligned manner.

3. The indirect evaporator unit according to claim 1, characterized in that, The exhaust area is equipped with multiple exhaust fans, which are arranged in multiple rows and columns along the horizontal and vertical directions; when the anti-condensation mode is activated, at least one of the exhaust fans is turned off.

4. The indirect evaporator unit according to claim 3, characterized in that, The exhaust area is provided with two rows and two columns of four exhaust fans, namely the first exhaust fan, the second exhaust fan, the third exhaust fan and the fourth exhaust fan, respectively. The first exhaust fan and the second exhaust fan are arranged side by side in the first row, and the third exhaust fan and the fourth exhaust fan are arranged side by side in the second row. The first row and the second row are aligned vertically, and the first exhaust fan and the third exhaust fan are aligned vertically, and the second exhaust fan and the fourth exhaust fan are aligned vertically. When the first and third exhaust fans are turned off, and the second and fourth exhaust fans are turned on, the exhaust airflow forms a left-right circulation pattern inside the core.

5. The indirect evaporator unit according to claim 1 or 4, characterized in that, Each of the aforementioned exhaust fans is installed on the exhaust fan wall; and / or A temperature and humidity probe is installed in the fresh air zone to sense the air temperature in the fresh air zone, and the temperature and humidity probe is electrically connected to the control system.

6. The indirect evaporator unit according to claim 1, characterized in that, The side of the core is formed by four side walls that are connected in pairs around each other, namely the first side wall, the second side wall, the third side wall and the fourth side wall. The first side wall and the second side wall are arranged opposite each other, and the third side wall and the fourth side wall are arranged opposite each other. The exhaust zone is connected to the first side wall through the exhaust duct, the fresh air zone is connected to the second side wall, the return air zone is connected to the third side wall, and the supply air zone is connected to the fourth side wall.

7. The indirect evaporator unit according to claim 6, characterized in that, The core is inclined along a horizontal plane inside the housing. The exhaust zone, return zone, fresh air zone, and supply air zone each occupy a corner of the housing and are arranged sequentially around the side of the core, dividing the remaining space inside the housing, excluding the space occupied by the core, into partitions; or The core is arranged horizontally or vertically within the housing. The exhaust zone, return air zone, fresh air zone, and supply air zone are arranged sequentially around the side of the core, occupying the remaining space inside the housing excluding the space occupied by the core.

8. A method for preventing condensation, characterized in that, The method for preventing condensation in the indirect evaporator unit according to any one of claims 1-7 includes: Step 100: Turn on the indirect evaporator unit; Step 200: When the temperature sensing device connected to the control system in the indirect evaporator unit senses that the temperature of the fresh air entering the fresh air zone is lower than the dew point temperature of the return air in the return air zone, the control system controls the adjustment to activate the anti-condensation mode. Step 300: When the anti-condensation mode is activated, the control system controls the first exhaust fan to turn on and the second exhaust fan to turn off, or turns on the second exhaust fan and turns off the first exhaust fan.

9. The anti-condensation control method according to claim 8, characterized in that, When the exhaust area is provided with two rows and two columns of four exhaust fans, namely the first exhaust fan, the second exhaust fan, the third exhaust fan and the fourth exhaust fan, respectively, the first exhaust fan and the second exhaust fan are arranged side by side in the first row, the third exhaust fan and the fourth exhaust fan are arranged side by side in the second row, the first row and the second row are aligned vertically, and the first exhaust fan and the third exhaust fan and the second exhaust fan are aligned vertically; When the anti-condensation mode is activated, it includes: Step 301: Turn off the first and second exhaust fans, and turn on the third and fourth exhaust fans to activate the exhaust airflow circulation mode inside the core; or Step 302: Turn off the first and third exhaust fans, and turn on the second and fourth exhaust fans to activate the exhaust airflow circulation mode within the core.

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