CN116123678A

CN116123678A - Evaporative cooling air conditioning unit control method and evaporative cooling air conditioning unit

Info

Publication number: CN116123678A
Application number: CN202211654846.8A
Authority: CN
Inventors: 李贺贺; 何伟光; 徐艳妮; 杨基文
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-05-16

Abstract

The present application relates to an evaporative cooling air conditioning unit control method, an evaporative cooling air conditioning unit control device, an evaporative cooling air conditioning unit, a computer readable storage medium and a computer program product. The method comprises the following steps: acquiring the temperature of the air-dried ball after the primary air comes out of the heat exchange core; when the temperature of the air-out ball of the primary air is lower than the target air supply temperature, controlling the air conditioning unit to operate in an indirect evaporative cooling mode; and when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature, controlling the air conditioning unit to operate in a dew point type evaporative cooling mode. By adopting the method, the application scene of the unit can be expanded to improve the user experience.

Description

Evaporative cooling air conditioning unit control method and evaporative cooling air conditioning unit

Technical Field

The application relates to the technical field of air conditioners, in particular to an evaporative cooling air conditioning unit control method and an evaporative cooling air conditioning unit.

Background

With the development of air conditioning technology, evaporative cooling air conditioning technology has emerged. The evaporative cooling air conditioning technology is an energy-saving, environment-friendly and sustainable development air conditioning technology, and can be widely used for comfort cooling and industrial building cooling.

Generally, the evaporative cooling air conditioning technology includes an evaporative cooling air conditioning technology based on a direct evaporative cooler having a cooling efficiency of 80-85% in a dry heat area. However, the direct evaporative cooler has low cooling capacity, low heat exchange efficiency and large humidification amount, so that the use of places is limited.

Disclosure of Invention

In view of the foregoing, it is desirable to provide an evaporative cooling air conditioning unit control method, an evaporative cooling air conditioning unit control device, an evaporative cooling air conditioning unit, a computer readable storage medium, and a computer program product that can expand the application scenarios of the unit.

In a first aspect, the present application provides a method for controlling an evaporative cooling air conditioning unit. The method comprises the following steps: acquiring the temperature of the air-dried ball after the primary air comes out of the heat exchange core; when the temperature of the air-out ball of the primary air is lower than the target supply air temperature, controlling the air conditioning unit to operate in an indirect evaporative cooling mode; and when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature, controlling the air conditioning unit to operate the dew point evaporative cooling mode.

In one embodiment, the evaporative cooling air conditioning unit includes a heat exchange core and a first damper, and the controlling the air conditioning unit to operate in a dew point evaporative cooling mode includes: and controlling the first air valve to be opened, wherein when the first air valve is opened, at least part of air inlets of the wet channels of the heat exchange core body are communicated with air outlets of the dry channels.

In one embodiment, the method further comprises: and in the dew-point evaporative cooling mode, adjusting the frequency of a blower of the air conditioning unit and the opening degree of a primary air inlet valve so that the difference between the air output of primary air and the target air output is in a first preset range.

In one embodiment, the method further comprises: and when the difference value between the air output of the primary air and the target air output is in a first preset range, adjusting the opening of a primary air inlet valve, the opening of a secondary air inlet valve, the frequency of an exhaust fan and the frequency of a water pump of the air conditioning unit so that the difference value between the air-out ball temperature of the primary air and the target air supply temperature is in a second preset range.

In one embodiment, the adjusting the opening degree of the primary air intake valve, the opening degree of the secondary air intake valve, the frequency of the exhaust fan and the frequency of the water pump of the air conditioning unit includes: increasing the current opening degree of the primary air inlet valve, the current opening degree of the secondary air inlet valve, the current exhaust fan frequency and the current water pump frequency.

In one embodiment, an evaporative cooling air conditioning unit includes a heat exchange core and a first damper, the controlling the air conditioning unit to operate in an indirect evaporative cooling mode includes: and controlling the first air valve to be closed, wherein when the first air valve is closed, at least part of air inlets of the wet channels and air outlets of the dry channels of the heat exchange core body are not communicated.

In one embodiment, the method further comprises: and in the indirect evaporative cooling mode, adjusting the frequency of a blower of the air conditioning unit and the opening degree of a primary air inlet valve so that the difference between the output air quantity of primary air and the target output air quantity is in a first preset range.

In one embodiment, the method further comprises: and when the difference value between the air output of the primary air and the target air output is in a first preset range, adjusting the opening degree of a secondary air inlet air valve, the frequency of an exhaust fan and the frequency of a water pump of the air conditioning unit so that the difference value between the air-out ball temperature of the primary air and the target air supply temperature is in a second preset range.

In one embodiment, the adjusting the opening degree of a secondary air inlet valve, the frequency of an exhaust fan and the frequency of a water pump of the air conditioning unit includes: increasing the opening degree of the current secondary air inlet valve, adjusting the current frequency of the exhaust fan to be the frequency corresponding to the preset multiple of the current frequency of the exhaust fan, and increasing the current frequency of the water pump to be the frequency corresponding to the maximum current gear; the opening of the secondary air inlet air valve after the secondary air inlet air valve is increased is larger than the minimum opening of the secondary air outlet air valve and smaller than the maximum opening of the secondary air outlet air valve.

In one embodiment, the method further comprises: and if the difference value between the temperature of the air-out ball of the primary air after adjusting the opening degree of the secondary air inlet air valve, the frequency of the exhaust fan and the frequency of the water pump of the air conditioning unit and the target air supply temperature is out of a second preset range, controlling the first air valve to be opened.

In one embodiment, the obtaining the temperature of the air-dried ball after the primary air comes out of the heat exchange core body includes: acquiring the air flow of the primary air at a primary air inlet channel, the primary air inlet dry bulb temperature after the primary air enters the heat exchange core, and the air flow of the secondary air at a secondary air inlet channel and the secondary air inlet wet bulb temperature after the secondary air enters the heat exchange core; wherein the air conditioning unit comprises the primary air inlet channel and the secondary air inlet channel; and obtaining the air-out ball temperature of the primary air according to the air inlet ball temperature of the primary air and the air flow of the primary air, and the air inlet wet ball temperature of the secondary air and the air flow of the secondary air.

In a second aspect, the present application further provides an evaporative cooling air conditioning unit control device. The device comprises: the acquisition module is used for acquiring the temperature of the air-dried ball after the primary air comes out of the heat exchange core body; the first control module is used for controlling the air conditioning unit to operate in an indirect evaporative cooling mode when the temperature of the air-out ball of the primary air is lower than the target air supply temperature; and the second control module is used for controlling the air conditioning unit to operate the dew point evaporative cooling mode when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature.

In a third aspect, the present application also provides an evaporative cooling air conditioning unit. The evaporative cooling air conditioning unit includes: the device comprises a controller, a temperature and humidity detection device and a heat exchange core body; the temperature and humidity detection device is used for acquiring the temperature of the air-dried balls after the primary air comes out of the heat exchange core body; the controller is used for controlling the air conditioning unit to operate in an indirect evaporative cooling mode when the temperature of the air-out ball of the primary air is lower than the target air supply temperature; and when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature, controlling the air conditioning unit to operate the dew point evaporative cooling mode.

In one embodiment, the evaporative cooling air conditioning unit further comprises a primary air inlet, a secondary air inlet, a primary air inlet channel, a secondary air inlet channel and a first air valve, wherein the primary air inlet channel is used for conveying primary air entering from the primary air inlet to the air inlet of the dry channel of the heat exchange core; the secondary air inlet channel is used for conveying secondary air entering from the secondary air inlet to the air inlet of the wet channel of the heat exchange core; and the controller is also used for controlling the first air valve to be opened when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature, so that at least part of the primary air coming out of the air outlet of the dry channel of the heat exchange core enters at least part of the air inlet of the wet channel of the heat exchange core.

In one embodiment, the controller is further configured to control the first damper to close when the air-out ball temperature of the primary air is lower than a target supply air temperature.

In one embodiment, the heat exchange core comprises a first core section, a second core section and a shielding piece arranged between the first core section and the second core section, an air inlet of a dry channel of the first core section is communicated with the primary air inlet channel, and an air inlet of a wet channel of the first core section is communicated with the secondary air inlet channel; the air outlet of the dry channel of the first section of the core body is communicated with the air inlet of the dry channel of the second section of the core body, and the air outlet of the wet channel of the first section of the core body is disconnected with the air inlet of the wet channel of the second section of the core body through the shielding piece; and a bypass return air channel is arranged between the air inlet of the wet channel of the second section of the core body and the air outlet of the dry channel of the second section of the core body when the first air valve is opened.

In one embodiment, the evaporative cooling air conditioning unit further comprises an evaporative cooling section, the first core section and the second core section are arranged on the evaporative cooling section, the upper portion of the evaporative cooling section comprises the primary air inlet channel and the secondary air inlet channel, and the lower portion of the evaporative cooling section comprises a spraying device, a water supplementing port, a water draining port and an overflow port.

In one embodiment, the evaporative cooling air conditioning unit further includes a blower and an exhaust fan, the first core section includes a first primary air inlet end, a first primary air outlet end, a second secondary air inlet end, and a second secondary air outlet end, the second core section includes a second primary air inlet end, a second primary air outlet end, a first return air inlet end, and a second return air outlet end, the first primary air inlet end is communicated with the primary air inlet channel, the first primary air outlet end is communicated with the second primary air inlet end through the dry channel, and an air supply channel is provided between the second primary air outlet end and the blower; the bypass return air channel is arranged between the primary return air outlet end and the first air valve, and is communicated with an air inlet of the wet channel of the second section of the core body through the primary return air inlet end; the secondary air inlet end is communicated with the secondary air inlet channel, and an exhaust channel is arranged between the secondary air outlet end and the exhaust fan.

In one embodiment, the evaporative cooling air conditioning unit further comprises an air supply section, wherein the air supply section is provided with the blower, the primary air supply air valve and the temperature and humidity detection device.

In one embodiment, the evaporative cooling air conditioning unit further includes a first intermediate section disposed between the evaporative cooling section and the air supply section, the first intermediate section including above the first intermediate section the first air valve, the secondary air inlet air valve, and the secondary air inlet channel.

In one embodiment, the evaporative cooling air conditioning unit further comprises an exhaust section provided with the exhaust fan and a secondary air exhaust air valve.

In one embodiment, the evaporative cooling air conditioning unit further comprises a second intermediate section, the second intermediate section is arranged between the evaporative cooling section and the exhaust section, a primary air inlet valve and a primary air inlet channel are arranged above the second intermediate section, and a water pump is arranged below the second intermediate section.

In a fourth aspect, the present application also provides a computer-readable storage medium. The computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of: acquiring the temperature of the air-dried ball after the primary air comes out of the heat exchange core; when the temperature of the air-out ball of the primary air is lower than the target supply air temperature, controlling the air conditioning unit to operate in an indirect evaporative cooling mode; and when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature, controlling the air conditioning unit to operate the dew point evaporative cooling mode.

In a fifth aspect, the present application also provides a computer program product. The computer program product comprises a computer program which, when executed by a processor, implements the steps of: acquiring the temperature of the air-dried ball after the primary air comes out of the heat exchange core; when the temperature of the air-out ball of the primary air is lower than the target supply air temperature, controlling the air conditioning unit to operate in an indirect evaporative cooling mode; and when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature, controlling the air conditioning unit to operate the dew point evaporative cooling mode.

The evaporative cooling air conditioning unit control method and device, the evaporative cooling air conditioning unit, the computer readable storage medium and the computer program product are used for controlling the air conditioning unit to operate in an indirect evaporative cooling mode when the temperature of the primary air outlet ball is lower than the target supply air temperature by acquiring the temperature of the primary air outlet ball after the primary air outlet ball is discharged from the heat exchange core body, and controlling the air conditioning unit to operate in a dew point evaporative cooling mode when the temperature of the primary air outlet ball is not lower than the target supply air temperature. Therefore, according to the relation between the temperature of the air-out ball of the primary air and the target air supply temperature, different modes of operation of the air conditioning unit can be controlled, so that the application scene of the air conditioning unit can be expanded, the evaporative cooling function of the air conditioning unit under different scenes is realized, and the use experience of a user on the air conditioning unit is improved.

Drawings

FIG. 1 is a schematic diagram of an evaporative cooling air conditioning unit in one embodiment;

FIG. 2 is a schematic diagram of a heat exchange core in one embodiment;

FIG. 3 is a schematic diagram of an evaporative cooling air conditioning unit according to another embodiment;

FIG. 4 is a flow chart of a method of controlling an evaporative cooling air conditioning unit in one embodiment;

FIG. 5 is a schematic flow chart of an embodiment for obtaining the temperature of the air-dried balls after the primary air comes out of the heat exchange core;

FIG. 6 is a flow chart of a method of controlling an evaporative cooling air conditioning unit in one embodiment;

FIG. 7 is a schematic illustration of a primary air treatment process in one embodiment;

fig. 8 is a block diagram of a control device of an evaporative cooling air conditioning unit in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

As shown in fig. 1, a schematic structural diagram of an evaporative cooling air conditioning unit is provided, wherein the evaporative cooling air conditioning unit 100 includes a heat exchange core 102, a primary air intake 104, and a secondary air intake 106. A primary air inlet channel 1042 is arranged between the primary air inlet 104 and the dry channel of the heat exchange core 102, and the primary air inlet channel 1042 is communicated with the air inlet of the dry channel of the heat exchange core 102. A secondary air inlet channel 1062 is arranged between the secondary air inlet 106 and the wet channel of the heat exchange core 102, and the secondary air inlet channel 1062 is communicated with the air inlet of the wet channel of the heat exchange core 102. A first air valve 108 is arranged between the air inlet of the wet channel and the air outlet of the dry channel of the heat exchange core 102, and when the first air valve 108 is in different on-off states, the operation modes of the evaporative cooling air conditioning unit are different.

Specifically, the primary air intake channel 1042 is used to convey primary air entering from the primary air intake to the intake of the dry channel of the heat exchange core. The secondary air inlet channel 1062 is used to deliver secondary air from the secondary air inlet to the inlet of the wet channel of the heat exchange core. It will be appreciated that the heat exchange core includes dry channels for primary air ingress and wet channels for secondary air ingress.

In one embodiment, the heat exchange core comprises a first core section, a second core section and a shielding piece arranged between the first core section and the second core section, wherein an air inlet of a dry channel of the first core section is communicated with a primary air inlet channel, and an air inlet of a wet channel of the first core section is communicated with a secondary air inlet channel; the air outlet of the dry channel of the first section of the core body is communicated with the air inlet of the dry channel of the second section of the core body, and the air outlet of the wet channel of the first section of the core body is disconnected with the air inlet of the wet channel of the second section of the core body through a shielding piece; the air inlet of the wet channel of the second section of the core body is provided with a bypass return air channel between the air inlet of the wet channel of the second section of the core body and the air outlet of the dry channel of the second section of the core body when the first air valve is opened. Therefore, when the first air valve is opened, after part of primary air cooled in the first section of the core body comes out from the air outlet of the dry channel of the second section of the core body, the part of primary air can pass through the bypass air return channel to enter the wet channel again through the air inlet of the wet channel of the second section of the core body, and then when the part of primary air exchanges heat with the primary air cooled in the dry channel of the second section of the core body, the wet bulb temperature of the cooled primary air coming out from the air outlet of the dry channel of the second section of the core body can be further reduced, and the temperature of the discharged primary air can reach the dew point temperature of secondary air.

It will be appreciated that the heat exchange core includes dry channels to absorb primary air and wet channels to absorb secondary air. As shown in fig. 2, a schematic structural diagram of a heat exchange core is provided, the heat exchange core includes a core first section and a core second section, a blocking member is disposed between the core first section and the core second section, and a dry channel and a wet channel are disposed in the core first section and the core second section, the dry channel is a channel into which primary air enters, and the wet channel is a channel into which secondary air enters. In one embodiment, a spray device and a water outlet may be provided below the heat exchange core, the spray device spraying fine mist from the lower portion to the upper portion so that the passage through which secondary air enters is a wet passage, the secondary air being countercurrent to the shower water.

In one embodiment, the evaporative cooling air conditioning unit further comprises an evaporative cooling section, and the heat exchange core is disposed in the evaporative cooling section, wherein the heat exchange core may be disposed at 45 ° to the evaporative cooling section. The heat exchange core body comprises a core body first section and a core body second section, a primary air inlet channel and a secondary air inlet channel are arranged above the evaporative cooling section, and a spraying device, a water supplementing port, a water outlet and an overflow port are arranged below the evaporative cooling section. The water supplementing port is used for providing water for the spraying device, the water outlet is used for discharging water before replacement when the water in the wet channel of the heat exchange core body is replaced, and the overflow port is used for discharging redundant water when the water supplementing port is used for supplementing too much water for the spraying device.

In one embodiment, the evaporative cooling air conditioning unit further comprises a blower and an exhaust fan, the first core section comprising a primary air first inlet end, a primary air first outlet end, a secondary air inlet end, and a secondary air outlet end; the second section of the core body comprises a primary air second air inlet end, a primary air second air outlet end, a primary return air inlet end and a primary return air outlet end. Specifically, a primary air first air inlet end is communicated with a primary air inlet channel, a primary air first air outlet end is communicated with a primary air second air inlet end through a dry channel, and an air supply channel is arranged between the primary air second air outlet end and the air feeder; a bypass return air channel is arranged between the primary return air outlet end and the first air valve, and is communicated with an air inlet of the wet channel of the second section of the core body through the primary return air inlet end; the secondary air inlet end is communicated with the secondary air inlet channel, and an exhaust channel is arranged between the secondary air outlet end and the exhaust fan.

The air supply channel is used for conveying at least part of the cooled primary air to the air feeder, so that the cooled at least part of the primary air can be conveyed to the room through the air feeder, and the cooling capacity is provided for a user. The bypass return air channel is used for conveying part of primary air cooled in the first section of the core body into the wet channel of the second section of the core body again through the bypass return air channel when the first air valve is opened after the part of primary air cooled in the first section of the core body comes out of the air outlet of the dry channel of the second section of the core body, so that the wet bulb temperature of the cooled primary air coming out of the air outlet of the dry channel of the second section of the core body can be further reduced when the primary air exchanges heat with the primary air cooled in the dry channel of the second section of the core body, and the temperature of the discharged primary air can reach the dew point temperature of secondary air.

It should be noted that the purpose of providing a barrier between the first core section and the second core section is: in order to ensure that secondary air in the wet channel of the first section of the core body after heat exchange with primary air in the first section of the core body does not enter the second section of the core body, but can be discharged from the secondary air outlet end of the first section of the core body through an exhaust fan, and the secondary air after heat exchange with the primary air is ensured not to be mixed in the cooled primary air to influence the cooling effect.

In one embodiment, the evaporative cooling air conditioning unit further comprises an air supply section provided with an air blower, a primary air supply air valve and a temperature and humidity detection device. The primary air supply air valve is used for adjusting the air quantity of the cooled primary air output by the blower indoors.

In one embodiment, the evaporative cooling air conditioning unit further includes a first intermediate section disposed between the evaporative cooling section and the air supply section. The upper part of the first middle section comprises a first air valve, a secondary air inlet air valve and a secondary air inlet channel. The secondary air inlet air valve is used for adjusting the air quantity of secondary air input into the secondary air inlet channel.

In one embodiment, the evaporative cooling air conditioning unit further comprises an exhaust section provided with an exhaust fan and a secondary air exhaust damper. The secondary air exhaust air valve is used for adjusting the air quantity of secondary air discharged outwards from the secondary air outlet end of the first section of the core body.

In one embodiment, the evaporative cooling air conditioning unit further includes a second intermediate section disposed between the evaporative cooling section and the exhaust section, the second intermediate section including a primary air intake valve and a primary air intake passage above and a water pump below the second intermediate section.

In combination with the foregoing, in one embodiment, as shown in fig. 3, a schematic diagram of an evaporative cooling air conditioning unit is provided. The evaporative cooling unit comprises an air supply section, a first middle section, an evaporative cooling section, a second middle section and an exhaust section, wherein the first middle section is arranged between the air supply section and the evaporative cooling section, and the second middle section is arranged between the exhaust section and the evaporative cooling section. Specifically, the first intermediate section includes a secondary air intake damper and a first damper for performing mode switching. The air supply section comprises an air feeder and a primary air supply air valve. The top of evaporation cooling section includes primary air inlet channel and secondary air inlet channel, and evaporation cooling section below includes spray set, moisturizing mouth, outlet and gap, and evaporation cooling section still includes core first section and core second section, and core first section and core second section constitute the heat transfer core. The upper part of the second intermediate section comprises a primary air inlet valve and a primary air inlet channel, and the lower part of the second intermediate section comprises a water pump. The exhaust section comprises an exhaust fan and a secondary air exhaust air valve.

In one embodiment, in combination with the above, the evaporative cooling air conditioning unit may further include a controller and a temperature and humidity detection device. Specifically, as shown in fig. 4, a flow chart of a control method of an evaporative cooling air conditioning unit is provided, and the method is applied to a controller in the evaporative cooling air conditioning unit, for example, and includes the following steps:

s402, obtaining the temperature of the air-dried balls after the primary air comes out of the heat exchange core.

In this embodiment, when the evaporative cooling air conditioning unit starts to operate, the primary air inlet valve, the secondary air outlet valve and the primary air inlet valve of the evaporative cooling unit may be controlled to operate according to the corresponding preset opening degrees, respectively, and the blower and the exhaust fan may be turned on after the water pump water supply valve is controlled to adjust to the preset opening degrees, and the water pump frequency may be adjusted to the preset frequency after the water pump water supply valve is controlled to adjust to the preset opening degrees. The preset opening degree and the preset frequency may be set as required, and the embodiment is not particularly limited.

And S404, when the temperature of the air-out ball of the primary air is lower than the target supply air temperature, controlling the air conditioning unit to operate in an indirect evaporative cooling mode.

It will be appreciated that when the primary air ball outlet temperature is lower than the target supply air temperature, i.e. the primary air ball outlet temperature is lower than the target supply air temperature, the temperature of the cooled primary air delivered to the room by the current evaporative cooling unit may satisfy the user demand, and thus, the air conditioning unit is controlled to operate in the indirect evaporative cooling mode to continue providing cool air to the user.

And S406, controlling the air conditioning unit to operate the dew point evaporative cooling mode when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature.

It can be understood that when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature, that is, when the temperature of the air-out ball of the primary air is greater than or equal to the target supply air temperature, it is indicated that the temperature of the cooled primary air delivered indoors by the current evaporative cooling unit cannot meet the user demand, and therefore, the temperature of the air-out ball of the primary air discharged by the blower is lower than the target supply air temperature and reaches the dew point temperature of the secondary air by controlling the air conditioning unit to operate the dew point evaporative cooling mode.

In summary, in the embodiment shown in fig. 4, by acquiring the temperature of the air-out balls after the primary air comes out of the heat exchange core, when the temperature of the air-out balls of the primary air is lower than the target supply air temperature, the air-conditioning unit is controlled to operate in the indirect evaporative cooling mode, and when the temperature of the air-out balls of the primary air is not lower than the target supply air temperature, the air-conditioning unit is controlled to operate in the dew point evaporative cooling mode. Therefore, according to the relation between the temperature of the air-out ball of the primary air and the target air supply temperature, different modes of operation of the air conditioning unit can be controlled, so that the application scene of the air conditioning unit can be expanded, the evaporative cooling function of the air conditioning unit under different scenes is realized, and the use experience of a user on the air conditioning unit is improved.

Based on the embodiment shown in fig. 4, in one embodiment, the evaporative cooling air conditioning unit includes a heat exchange core, and the control unit controls the air conditioning unit to operate in a dew point evaporative cooling mode, including: and controlling the first air valve to be opened, wherein when the first air valve is opened, at least part of air inlets of the wet channels of the heat exchange core body are communicated with air outlets of the dry channels.

Specifically, the heat exchange core comprises a first core section and a second core section, after the first air valve is opened, secondary air in the wet channel of the first core section and primary air in the dry channel exchange heat, so that the primary air in the dry channel can be cooled, and the flow direction of the cooled primary air after reaching the second core section comprises two paths. One path is that at least part of the cooled primary air passes through the primary air second air outlet end of the second section of the core body and then is sent into the room through the air feeder to provide cooling capacity for users. The other path is that at least part of the cooled primary air passes through the primary air return outlet end of the second section of the core body, reaches the primary air return inlet end of the second section of the core body through the bypass air return channel, and enters the wet channel of the second section of the core body. Therefore, when at least part of cooling air entering the wet channel of the second section of the core body exchanges heat with the primary air cooled in the dry channel of the second section of the core body again, the wet bulb temperature of the cooled primary air coming out of the air outlet of the dry channel of the second section of the core body can be further reduced, the temperature of the discharged primary air can reach the dew point temperature of secondary air, and the heat exchange efficiency is improved.

Further, in one embodiment, the evaporative cooling air conditioning unit control method further includes: in the dew point evaporative cooling mode, the blower frequency of the air conditioning unit and the opening of the primary air inlet valve are adjusted so that the difference between the output air volume of the primary air and the target output air volume is within a first preset range. Specifically, when the evaporative cooling air conditioning unit is operated in the dew point evaporative cooling mode by controlling the first air valve to be opened, whether the difference between the air output of the primary air and the target air output is within a first preset range or not can be detected according to a first preset period. If the difference between the air output of the primary air and the target air output is out of the first preset range, the frequency of a blower of the evaporative cooling air conditioning unit and the opening degree of the primary air inlet valve are adjusted so that the difference between the air output of the primary air and the target air output is in the first preset range.

In one embodiment, adjusting the blower frequency and the opening of the primary air intake valve of the air conditioning unit includes: the current blower frequency is adjusted to be a first preset frequency, and the current opening of the primary air inlet valve is adjusted to be a first preset opening, so that the difference between the air output of primary air and the target air output is in a first preset range. Wherein the first preset period may be 5 seconds or other values. The difference between the air output of the primary air and the target air output being within the first preset range may be understood as the difference between the air output of the primary air and the target air output being less than or equal to the first floating value. Specifically, the air output of the primary air is determined to be the target air output ±Δ1 according to the target air output and the first floating value Δ1. In this embodiment, Δ1 may be 0.05 or other values, which may be specifically set according to the actual application scenario, and the embodiment is not specifically limited.

It can be understood that after adjusting the blower frequency of the air conditioning unit and the opening of the primary air inlet valve, if the difference between the air output of the primary air and the target air output detected according to the first preset period is in the first preset range, the blower can be controlled to continue to work according to the current frequency and the primary air inlet valve can be controlled to continue to work according to the current opening, so as to ensure that the difference between the detected air output of the primary air and the target air output is still in the first preset range when the air output of the primary air is detected subsequently.

Further, in one embodiment, when the difference between the air output of the primary air and the target air output is within the first preset range, the opening of the primary air intake valve, the opening of the secondary air intake valve, the frequency of the exhaust fan and the frequency of the water pump of the air conditioning unit are adjusted so that the difference between the air-out ball temperature of the primary air and the target air supply temperature is within the second preset range. Specifically, when the difference between the air output of the primary air and the target air output is within the first preset range, whether the difference between the air-out ball temperature of the primary air and the target air supply temperature is within the second preset range may be detected according to the second preset period. If the difference between the air-out ball temperature of the primary air and the target air supply temperature is out of the second preset range, the difference between the air-out ball temperature of the primary air and the target air supply temperature is in the second preset range by adjusting the opening of the primary air inlet valve, the opening of the secondary air inlet valve, the frequency of the exhaust fan and the frequency of the water pump of the air conditioning unit.

Wherein the second preset period may be 5 seconds or other value. The difference between the air-out ball temperature of the primary air and the target supply air temperature being within the second preset range may be understood as the difference between the air-out ball temperature of the primary air and the target supply air temperature being less than or equal to the second float value. Specifically, the temperature of the air-dried ball of the primary air is determined to be the target air supply temperature ±Δ2 according to the target air supply temperature and the second floating value Δ2. In this embodiment, Δ2 may be 0.05 or other values, which may be specifically set according to the actual application scenario, and the embodiment is not specifically limited.

In one embodiment, adjusting the opening of a primary air intake valve, the opening of a secondary air intake valve, the frequency of an exhaust fan, and the frequency of a water pump of an air conditioning unit includes: increasing the current opening of the primary air inlet valve, increasing the current opening of the secondary air inlet valve, increasing the current exhaust fan frequency and increasing the current water pump frequency. The current frequency of the water pump can be increased according to the air quantity (namely, the air quantity) of the secondary air discharged by the exhaust fan, wherein the air quantity is the sum of the primary air quantity entering from the primary air inlet and the secondary air quantity entering from the secondary air inlet after the primary air quantity is subtracted from the primary air quantity discharged from the blower. When the amount of primary air is increased, the corresponding amount of exhaust air is also increased, and if the frequency of the exhaust fan is not increased, the internal pressure of the unit may be excessively increased, and therefore, when the amount of air is increased, the frequency of the exhaust fan needs to be increased.

It can be understood that after adjusting the opening of the primary air inlet valve, the opening of the secondary air inlet valve, the frequency of the exhaust fan and the frequency of the water pump of the air conditioning unit, if the difference between the temperature of the air outlet ball of the primary air and the target air supply temperature is detected to be within the second preset range according to the second preset period, the blower and the exhaust fan can be controlled to continue to operate according to the current frequency, and the water pump and the air inlet valve are controlled to continue to operate according to the current opening, so that the difference between the air outlet volume of the primary air and the target air supply volume is ensured to be within the first preset range, and the subsequently detected difference between the temperature of the air outlet ball of the primary air and the target air supply temperature is also within the second preset range, thereby improving the refrigerating capacity of the air conditioning unit.

In one embodiment, an evaporative cooling air conditioning unit includes a heat exchange core and a first damper, controls the air conditioning unit to operate in an indirect evaporative cooling mode, and includes: and controlling the first air valve to be closed, wherein when the first air valve is closed, at least part of air inlets of the wet channels and air outlets of the dry channels of the heat exchange core body are not communicated. In this way, at least part of the primary air cooled by the heat exchange core body cannot enter the wet channel in the heat exchange core body, and heat exchange is continued with the primary air cooled in the dry channel of the heat exchange core body.

Further, in one embodiment, the evaporative cooling air conditioning unit control method further includes: in the indirect evaporative cooling mode, the blower frequency of the air conditioning unit and the opening degree of the primary air inlet valve are adjusted so that the difference between the output air quantity of the primary air and the target output air quantity is within a first preset range. Specifically, when the first air valve is controlled to be closed so that the evaporative cooling air conditioning unit operates in the indirect evaporative cooling mode, whether the difference between the air output of the primary air and the target air output is within a first preset range or not may be detected according to a first preset period. If the difference between the air output of the primary air and the target air output is out of the first preset range, the difference between the air output of the primary air and the target air output is in the first preset range by adjusting the frequency of a blower of the air conditioning unit and the opening degree of the primary air inlet valve. The specific content of the first preset period may be described with reference to the foregoing content adaptation description, which is not repeated herein.

In one embodiment, adjusting the blower frequency and the opening of the primary air intake valve of the air conditioning unit includes: the current blower frequency is adjusted to be a second preset frequency, and the current opening of the primary air inlet valve is adjusted to be a second preset opening. The current blower frequency can be adjusted according to the current blower static pressure value of the air conditioning unit.

It can be understood that after adjusting the blower frequency of the air conditioning unit and the opening of the primary air inlet valve, if the difference between the air output of the primary air and the target air output detected according to the first preset period is in the first preset range, the blower can be controlled to continue to operate according to the current frequency, and the primary air inlet valve is controlled to continue to operate according to the current opening, so as to ensure that the difference between the detected air output of the primary air and the target air output is still in the first preset range when the air output of the primary air is detected according to the first preset period.

Further, in one embodiment, the evaporative cooling air conditioning unit control method further includes: when the difference between the air output of the primary air and the target air output is within a first preset range, the opening degree of a secondary air inlet valve, the frequency of an exhaust fan and the frequency of a water pump of the air conditioning unit are adjusted, so that the difference between the temperature of the air-out ball of the primary air and the target air supply temperature is within a second preset range. Specifically, when the difference between the air output of the primary air and the target air output is within the first preset range, whether the difference between the air-out ball temperature of the primary air and the target air supply temperature is within the second preset range may be detected according to the second preset period. If the difference between the air-out ball temperature of the primary air and the target air supply temperature is out of the second preset range, the opening degree of a secondary air inlet air valve, the frequency of an exhaust fan and the frequency of a water pump of the air conditioning unit are adjusted, so that the difference between the air-out ball temperature of the primary air and the target air supply temperature is in the second preset range. The specific content of the second preset period may be described with reference to the foregoing content adaptation description, which is not repeated herein.

In one embodiment, adjusting the opening of a secondary air intake valve, the frequency of an exhaust fan and the frequency of a water pump of an air conditioning unit comprises: increasing the opening degree of a current secondary air inlet air valve, adjusting the current exhaust fan frequency to be the frequency corresponding to the preset multiple of the current exhaust fan frequency, and adjusting the current water pump frequency to be the frequency corresponding to the maximum gear of the water pump. The opening of the secondary air inlet air valve after the secondary air inlet air valve is increased is larger than the minimum opening of the secondary air outlet air valve and smaller than the maximum opening of the secondary air outlet air valve.

It can be understood that in the indirect evaporative cooling mode, if the blower frequency of the air conditioning unit and the opening degree of the primary air inlet valve are adjusted, after the difference between the air output of the primary air and the target air output is within the first preset range, the blower can be controlled to continue to operate according to the current frequency, and the primary air inlet valve can be controlled to continue to operate according to the current opening degree. If the opening degree of the secondary air inlet air valve, the frequency of the exhaust fan and the frequency of the water pump of the air conditioning unit are adjusted, so that the difference value between the temperature of the air-out ball of the primary air and the target air supply temperature is within a second preset range, the exhaust fan can be controlled to work continuously according to the current frequency, and the water pump and the secondary air inlet air valve are controlled to work continuously according to the current opening degree, so that the difference value between the air-out quantity of the primary air and the target air supply quantity is ensured to be within a first preset range, and meanwhile, the difference value between the temperature of the air-out ball of the primary air and the target air supply temperature is also within the second preset range, and the refrigerating capacity of the air conditioning unit is improved.

Further, in one embodiment, the evaporative cooling air conditioning unit control method further includes: and if the difference value between the air-out ball temperature of the primary air after adjusting the opening degree of the secondary air inlet air valve, the frequency of the exhaust fan and the frequency of the water pump of the air conditioning unit and the target air supply temperature is out of a second preset range, controlling the first air valve to be opened. It will be appreciated that after the opening degree of the secondary air intake valve, the frequency of the exhaust fan and the frequency of the water pump of the air conditioning unit are adjusted, the difference between the air-out ball temperature of the primary air and the target supply air temperature cannot be ensured to be within the second preset range, and therefore, the operation mode of the air conditioning unit needs to be switched to the dew-point evaporative cooling mode, so that the difference between the air-out ball temperature of the primary air and the target supply air temperature is within the second preset range.

In one embodiment, as shown in fig. 5, a schematic flow chart for obtaining the temperature of the air-dried balls after the primary air comes out of the heat exchange core is provided, which comprises the following steps:

s502, acquiring the air flow of the primary air at the primary air inlet channel and the primary air inlet dry bulb temperature after the primary air enters the heat exchange core, and the air flow of the secondary air at the secondary air inlet channel and the secondary air inlet wet bulb temperature after the secondary air enters the heat exchange core.

In this embodiment, when the evaporative cooling air conditioning unit starts to operate, the primary air inlet valve, the secondary air outlet valve and the primary air inlet valve of the evaporative cooling unit may be controlled to operate according to the corresponding preset opening degrees, respectively, and the blower and the exhaust fan may be turned on after the water pump water supply valve is controlled to adjust to the preset opening degrees, and the water pump frequency may be adjusted to the preset frequency after the water pump water supply valve is controlled to adjust to the preset opening degrees. Thus, through the temperature and humidity detection devices respectively arranged on the primary air inlet channel and the secondary air inlet channel, a corresponding enthalpy and humidity diagram can be obtained, and then the primary air inlet dry bulb temperature and the secondary air inlet wet bulb temperature are obtained.

In one embodiment, the primary air can be externally connected with an air pipe before entering the primary air inlet channel through the primary air inlet, i.e. the primary air can be externally connected with the air pipe before entering the air conditioning unit; meanwhile, the secondary air can be externally connected with an air pipe before entering the secondary air inlet channel through the secondary air inlet, namely, the secondary air can be externally connected with the air pipe before entering the air conditioning unit, and the air flow of the primary air and the air flow of the secondary air can be measured through an anemometer arranged in the corresponding air pipe.

S504, obtaining the air-out ball temperature of the primary air according to the air inlet ball temperature of the primary air and the air flow of the primary air, and the air inlet wet ball temperature of the secondary air and the air flow of the secondary air.

Specifically, the primary air inlet dry bulb temperature, the secondary air inlet wet bulb temperature, the air flow of the primary air, the air flow of the secondary air and the air outlet dry bulb temperature of the primary air satisfy the following formulas:

the heat exchange efficiency is corresponding to the air conditioning unit in an indirect evaporative cooling mode when the first air valve is not opened. It will be appreciated that when the air conditioning unit starts to operate, the air conditioning unit is operated in the indirect evaporative cooling mode, and when the air-out ball temperature of the primary air is obtained according to the corresponding heat exchange efficiency when the air conditioning unit is operated in the indirect evaporative cooling mode, whether to keep the first air valve closed or control the first air valve to be opened so as to enable the air conditioning unit to operate in the dew point evaporative cooling mode can be determined according to the magnitude relation between the air-out ball temperature of the primary air and the target supply air temperature.

Specifically, the heat exchange efficiency satisfies the following formula:

wherein the first value satisfies the following formula:

In the above formula, NTU represents the number of heat transfer units; m' represents the mass flow rate of the primary air in kg/s, and the air flow rate of the primary air is the ratio of the mass flow rate of the primary air to the air density of the primary air; m' represents secondary airMass flow rate in kg/s, air flow rate of secondary air is the ratio of the mass flow rate of secondary air to the air density of secondary air; c _p The constant pressure specific heat capacity of the primary air is expressed in kJ/(kg. DEG C); c _pw The specific heat capacity of air at constant pressure, defined as secondary air wet bulb temperature, is expressed in kJ/(kg. Deg.C.).

In summary, in the embodiment shown in fig. 5, by acquiring the air flow of the primary air at the primary air inlet channel, the primary air inlet dry bulb temperature after the primary air enters the heat exchange core, and the air flow of the secondary air at the secondary air inlet channel, and the secondary air inlet wet bulb temperature after the secondary air enters the heat exchange core, the air outlet dry bulb temperature of the primary air is obtained according to the primary air inlet dry bulb temperature, the air flow of the primary air, the secondary air inlet wet bulb temperature and the air flow of the secondary air, so that the operation mode of the control unit can be determined based on the magnitude relation between the air outlet dry bulb temperature of the primary air and the target air supply temperature, so as to expand the application scene of the air conditioning unit, realize the evaporative cooling function of the air conditioning unit under different scenes, and improve the use experience of users on the air conditioning unit.

In combination with the foregoing, in one embodiment, as shown in fig. 6, a flow chart of a control method of an evaporative cooling air conditioning unit is provided, and the specific contents are described as follows: when the evaporative cooling air conditioning unit starts to operate, the primary air inlet air valve, the secondary air outlet air valve and the primary air inlet air valve of the evaporative cooling unit can be controlled to operate according to corresponding preset opening degrees respectively, the blower and the exhaust fan are started after the water pump water supply valve is controlled to be adjusted to the preset opening degrees, and the water pump frequency is controlled to be the preset frequency after the water pump water supply valve is controlled to be adjusted to the preset opening degrees, and further, the following steps can be executed:

s602, acquiring the air inlet dry bulb temperature of the primary air and the air flow of the primary air, and the air inlet wet bulb temperature of the secondary air and the air flow of the secondary air.

S604, obtaining the air-out ball temperature of the primary air according to the air inlet ball temperature of the primary air and the air flow of the primary air, and the air inlet wet ball temperature of the secondary air and the air flow of the secondary air.

Specifically, according to the magnitude relation between the temperature of the air-out ball of the primary air and the target air supply temperature, the running mode of the air conditioning unit is controlled by controlling the on-off state of the first air valve. When the operation mode of the air conditioning unit is the indirect evaporative cooling mode, the descriptions of S6061 to S6067 are included. When the operation mode of the air conditioning unit is the dew point evaporative cooling mode, the descriptions of S6081 to S6086 are included.

And S6061, when the temperature of the air-out ball of the primary air is lower than the target supply air temperature, the first air valve is controlled to be closed, and the air conditioning unit operates in an indirect evaporative cooling mode.

S6062, continuously detecting whether the air output of the primary air is equal to the target air output +/-first floating value for 5 seconds when the air conditioning unit operates in the indirect evaporative cooling mode.

And S6063, if the air output of the primary air is not equal to the target air output plus or minus a first floating value, adjusting the frequency of the blower and the opening degree of the primary air inlet valve so that the air output of the primary air is equal to the target air output plus or minus the first floating value.

S6064, if the air output of the primary air is equal to the target air output plus or minus a first floating value, continuously detecting whether the air-out ball temperature of the primary air is equal to the target air output plus or minus a second floating value for 5 seconds.

And S6065, if the temperature of the air-out ball of the primary air is equal to the target supply air temperature plus or minus a second floating value, controlling the evaporative cooling air conditioning unit to operate according to the current working condition, namely controlling all devices in the air conditioning unit to operate according to the current frequency or opening.

And S6066, if the temperature of the air-out ball of the primary air is not equal to the target supply air temperature plus or minus the second floating value, adjusting the opening degree of the secondary air inlet air valve, the frequency of the exhaust fan and the frequency of the water pump.

S6067, after adjusting the opening degree of the secondary air inlet air valve, the frequency of the exhaust fan and the frequency of the water pump, if the continuous 5S detects that the temperature of the air-out ball of the primary air is not equal to the target air supply temperature plus or minus the second floating value, controlling the first air valve to be opened, and switching the operation mode of the air conditioning unit into the dew-point evaporative cooling mode. And if the opening degree of the secondary air inlet air valve, the frequency of the exhaust fan and the frequency of the water pump are regulated, and if the temperature of the air-out ball of the primary air detected by continuous 5s is equal to the target air supply temperature +/-second floating value, controlling the air conditioning unit to operate according to the current working condition, namely controlling all devices in the air conditioning unit to operate according to the current frequency or opening degree.

And S6081, when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature, controlling the first air valve to be opened, and operating the dew point evaporative cooling mode of the air conditioning unit.

S6082, when the air conditioning unit operates in the indirect evaporative cooling mode, continuously detecting whether the air output of the primary air is equal to the target air output +/-first floating value for 5 seconds.

And S6083, if the air output of the primary air is not equal to the target air output plus or minus a first floating value, adjusting the frequency of the blower and the opening degree of the primary air inlet valve so that the air output of the primary air is equal to the target air output plus or minus the first floating value.

S6084, if the air output of the primary air is equal to the target air output plus or minus a first floating value, continuously detecting whether the air-out ball temperature of the primary air is equal to the target air output plus or minus a second floating value for 5 seconds. And if the temperature of the air-out ball of the primary air is equal to the target supply air temperature plus or minus the second floating value, controlling the air conditioning unit to operate according to the current working condition, namely controlling all devices in the air conditioning unit to operate according to the current frequency or opening.

S6085, if the air output of the primary air is equal to the target air output plus or minus a first floating value, continuously detecting whether the air-out ball temperature of the primary air is equal to the target air output plus or minus a second floating value for 5 seconds. And if the temperature of the air-out ball of the primary air is not equal to the target supply air temperature plus or minus the second floating value, adjusting the opening of the primary air inlet valve, the opening of the secondary air inlet valve, the frequency of the exhaust fan and the frequency of the water pump.

S6086, after adjusting the opening degree of the primary air inlet valve, the opening degree of the secondary air inlet valve, the frequency of the exhaust fan and the frequency of the water pump, if the temperature of the air-out ball of the primary air is detected to be not equal to the target air supply temperature +/-second floating value for 5 seconds continuously, executing S6085. After adjusting the opening of the primary air inlet valve, the opening of the secondary air inlet valve, the frequency of the exhaust fan and the frequency of the water pump, if the temperature of the air-out ball of the primary air is detected to be equal to the target air supply temperature +/-second floating value for 5 seconds continuously, the air conditioning unit is controlled to operate according to the current working condition, namely, all devices in the air conditioning unit are controlled to operate according to the current frequency or opening.

After adjusting the opening of the primary air inlet valve, the opening of the secondary air inlet valve, the frequency of the exhaust fan and the frequency of the water pump, and when detecting that the temperature of the air-out ball of the primary air is not equal to the target supply air temperature + -the second floating value for 5 seconds continuously, in S6085, the opening of the secondary air inlet valve can be preferentially increased, and after increasing the opening of the secondary air inlet valve, if it is determined that the detected temperature of the air-out ball of the primary air is not equal to the target supply air temperature + -the second floating value, the opening of the secondary air inlet valve, the opening of the primary air inlet valve, the frequency of the exhaust fan and the frequency of the water pump are continuously adjusted.

It will be appreciated that in the embodiment shown in fig. 6, opening the first damper may cause the air conditioning unit to operate in the dew point evaporative cooling mode, and the primary air treatment process cooled by the constant temperature drop on the dry channel side while the air conditioning unit is operating in the dew point evaporative cooling mode is shown in fig. 7. From point 1 to point 2, part of primary air enters the wet channel side of the second section of the core body through the first air valve to become secondary air, isenthalpic cooling is performed in the wet channel, from point 2 to point 5, then the primary air in the dry channel of the second section of the core body is cooled, and the temperature of the primary air at the dry channel side is lower than the wet bulb temperature at the air inlet of the secondary air in the process of waiting for the wet cooling, such as from point 2 to point 4. With this circulation, the primary air outlet temperature after stabilization is lower than the wet bulb temperature of secondary air, approaches the dew point temperature of primary air, reaches the demand target supply air temperature, and the demand target refrigerating output. When the evaporative cooling air conditioning unit runs in the dew point evaporative cooling mode, the opening and closing of the primary air inlet valve and the opening of the secondary air inlet valve can be regulated according to the monitoring of the temperature and humidity detection device arranged in the air supply section, the air supply frequency of primary air and the air exhaust frequency of secondary air are increased or reduced, after the air supply quantity of the primary air reaches the target air supply quantity, the air supply frequency is not increased, but the opening of the primary air inlet valve is not regulated any more, the opening of the primary air inlet method in the dew point evaporative cooling mode is always larger than the opening corresponding to the target air supply quantity, and the water pump regulates the gear according to the air-water ratio according to the secondary air quantity.

It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.

Based on the same inventive concept, the embodiment of the application also provides an evaporative cooling air conditioning unit control device for realizing the above-mentioned control method of the evaporative cooling air conditioning unit. The implementation of the solution provided by the device is similar to that described in the above method, so the specific limitation in the embodiments of the control device of the evaporative cooling air conditioning unit provided below may be referred to the limitation of the control method of the evaporative cooling air conditioning unit hereinabove, and will not be repeated herein.

In one embodiment, as shown in fig. 8, there is provided an evaporative cooling air conditioning unit control device, comprising: an acquisition module 802, a first control module 804, and a second control module 806, wherein: an acquisition module 802 is configured to acquire a temperature of the air-dried ball after the primary air exits the heat exchange core. The first control module 804 is configured to control the air conditioning unit to operate in the indirect evaporative cooling mode when the temperature of the primary air in the air-out ball is lower than the target supply air temperature. And a second control module 806, configured to control the air conditioning unit to operate in the dew point evaporative cooling mode when the temperature of the primary air in the air-out ball is not lower than the target supply air temperature.

In one embodiment, the evaporative cooling air conditioning unit includes a heat exchange core and a first damper, and the second control module 806 is further configured to: and controlling the first air valve to be opened, wherein when the first air valve is opened, at least part of air inlets of the wet channels of the heat exchange core body are communicated with air outlets of the dry channels.

In one embodiment, the second control module 806 is further configured to: in the dew point evaporative cooling mode, the blower frequency of the air conditioning unit and the opening of the primary air inlet valve are adjusted so that the difference between the output air volume of the primary air and the target output air volume is within a first preset range.

In one embodiment, the second control module 806 is further configured to: when the difference between the air output of the primary air and the target air output is in a first preset range, the opening of a primary air inlet valve, the opening of a secondary air inlet valve, the frequency of an exhaust fan and the frequency of a water pump of the air conditioning unit are adjusted so that the difference between the temperature of the air-out ball of the primary air and the target air supply temperature is in a second preset range.

In one embodiment, the second control module 806 is further configured to: the opening degree of the primary air inlet air valve, the opening degree of the secondary air inlet air valve, the frequency of the exhaust fan and the frequency of the water pump of the air conditioning unit are adjusted, and the air conditioning unit comprises: increasing the current opening of the primary air inlet valve, increasing the opening of the secondary air inlet valve, increasing the current exhaust fan frequency and increasing the current water pump frequency.

In one embodiment, the evaporative cooling air conditioning unit includes a heat exchange core and a first damper, and the first control module 904 is further configured to: and controlling the first air valve to be closed, wherein when the first air valve is closed, at least part of air inlets of the wet channels and air outlets of the dry channels of the heat exchange core body are not communicated.

In one embodiment, the first control module 804 is further configured to: in the indirect evaporative cooling mode, the blower frequency of the air conditioning unit and the opening degree of the primary air inlet valve are adjusted so that the difference between the output air quantity of the primary air and the target output air quantity is within a first preset range.

In one embodiment, the first control module 804 is further configured to: when the difference between the air output of the primary air and the target air output is within a first preset range, the opening degree of a secondary air inlet valve, the frequency of an exhaust fan and the frequency of a water pump of the air conditioning unit are adjusted, so that the difference between the temperature of the air-out ball of the primary air and the target air supply temperature is within a second preset range.

In one embodiment, the first control module 804 is further configured to: adjusting the opening degree of a secondary air inlet air valve, the frequency of an exhaust fan and the frequency of a water pump of an air conditioning unit, comprising: increasing the opening degree of a current secondary air inlet air valve, adjusting the current exhaust fan frequency to be the frequency corresponding to the preset multiple of the current exhaust fan frequency, and increasing the current water pump frequency to be the frequency corresponding to the maximum current gear of the water pump; the opening of the secondary air inlet air valve after the secondary air inlet air valve is increased is larger than the minimum opening of the secondary air outlet air valve and smaller than the maximum opening of the secondary air outlet air valve.

In one embodiment, the first control module 804 is further configured to: and if the difference value between the air-out ball temperature of the primary air after adjusting the opening degree of the secondary air inlet air valve, the frequency of the exhaust fan and the frequency of the water pump of the air conditioning unit and the target air supply temperature is out of a second preset range, controlling the first air valve to be opened.

In one embodiment, the obtaining module 802 is further configured to: acquiring the air flow of primary air at a primary air inlet channel, the temperature of a primary air inlet dry bulb after the primary air enters a heat exchange core, and the air flow of secondary air at a secondary air inlet channel and the temperature of a secondary air inlet wet bulb after the secondary air enters the heat exchange core; the air conditioning unit comprises a primary air inlet channel and a secondary air inlet channel; and obtaining the air-out ball temperature of the primary air according to the air inlet ball temperature of the primary air and the air flow of the primary air, and the air inlet wet ball temperature of the secondary air and the air flow of the secondary air.

The above-mentioned various modules in the control device of the evaporative cooling air conditioning unit can be implemented in whole or in part by software, hardware and a combination thereof. The modules can be embedded in a processor in the evaporative cooling air conditioning unit in a hardware mode or can be independent of the processor in the evaporative cooling air conditioning unit in a software mode, and the modules can be stored in a memory in the evaporative cooling air conditioning unit in a software mode, so that the processor can call and execute operations corresponding to the modules.

In one embodiment, an evaporative cooling air conditioning unit is provided, comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program performing the steps of: acquiring the temperature of the air-dried ball after the primary air comes out of the heat exchange core; when the temperature of the air-out ball of the primary air is lower than the target air supply temperature, controlling the air conditioning unit to operate in an indirect evaporative cooling mode; and when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature, controlling the air conditioning unit to operate in a dew point type evaporative cooling mode.

In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of: acquiring the temperature of the air-dried ball after the primary air comes out of the heat exchange core; when the temperature of the air-out ball of the primary air is lower than the target air supply temperature, controlling the air conditioning unit to operate in an indirect evaporative cooling mode; and when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature, controlling the air conditioning unit to operate in a dew point type evaporative cooling mode.

In one embodiment, the evaporative cooling air conditioning unit includes a heat exchange core and a first damper, the computer program when executed by the processor further implementing the steps of: and controlling the first air valve to be opened, wherein when the first air valve is opened, at least part of air inlets of the wet channels of the heat exchange core body are communicated with air outlets of the dry channels.

In one embodiment, the computer program when executed by the processor further performs the steps of: in the dew point evaporative cooling mode, the blower frequency of the air conditioning unit and the opening of the primary air inlet valve are adjusted so that the difference between the output air volume of the primary air and the target output air volume is within a first preset range.

In one embodiment, the computer program when executed by the processor further performs the steps of: when the difference between the air output of the primary air and the target air output is in a first preset range, the opening of a primary air inlet valve, the opening of a secondary air inlet valve, the frequency of an exhaust fan and the frequency of a water pump of the air conditioning unit are adjusted so that the difference between the temperature of the air-out ball of the primary air and the target air supply temperature is in a second preset range.

In one embodiment, the computer program when executed by the processor further performs the steps of: increasing the current opening of the primary air inlet valve, increasing the opening of the secondary air inlet valve, increasing the current exhaust fan frequency and increasing the current water pump frequency.

In one embodiment, the evaporative cooling air conditioning unit includes a heat exchange core and a first damper, the computer program when executed by the processor further implementing the steps of: and controlling the first air valve to be closed, wherein when the first air valve is closed, at least part of air inlets of the wet channels and air outlets of the dry channels of the heat exchange core body are not communicated.

In one embodiment, the computer program when executed by the processor further performs the steps of: in the indirect evaporative cooling mode, the blower frequency of the air conditioning unit and the opening degree of the primary air inlet valve are adjusted so that the difference between the output air quantity of the primary air and the target output air quantity is within a first preset range.

In one embodiment, the computer program when executed by the processor further performs the steps of: when the difference between the air output of the primary air and the target air output is within a first preset range, the opening degree of a secondary air inlet valve, the frequency of an exhaust fan and the frequency of a water pump of the air conditioning unit are adjusted, so that the difference between the temperature of the air-out ball of the primary air and the target air supply temperature is within a second preset range.

In one embodiment, the computer program when executed by the processor further performs the steps of: increasing the opening degree of a current secondary air inlet air valve, adjusting the current exhaust fan frequency to be the frequency corresponding to the preset multiple of the current exhaust fan frequency, and increasing the current water pump frequency to be the frequency corresponding to the maximum current gear of the water pump; the opening of the secondary air inlet air valve after the secondary air inlet air valve is increased is larger than the minimum opening of the secondary air outlet air valve and smaller than the maximum opening of the secondary air outlet air valve.

In one embodiment, the computer program when executed by the processor further performs the steps of: and if the difference value between the air-out ball temperature of the primary air after adjusting the opening degree of the secondary air inlet air valve, the frequency of the exhaust fan and the frequency of the water pump of the air conditioning unit and the target air supply temperature is out of a second preset range, controlling the first air valve to be opened.

In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring the air flow of primary air at a primary air inlet channel, the temperature of a primary air inlet dry bulb after the primary air enters a heat exchange core, and the air flow of secondary air at a secondary air inlet channel and the temperature of a secondary air inlet wet bulb after the secondary air enters the heat exchange core; the air conditioning unit comprises a primary air inlet channel and a secondary air inlet channel; and obtaining the air-out ball temperature of the primary air according to the air inlet ball temperature of the primary air and the air flow of the primary air, and the air inlet wet ball temperature of the secondary air and the air flow of the secondary air.

In one embodiment, a computer program product is provided comprising a computer program which, when executed by a processor, performs the steps of: acquiring the temperature of the air-dried ball after the primary air comes out of the heat exchange core; when the temperature of the air-out ball of the primary air is lower than the target air supply temperature, controlling the air conditioning unit to operate in an indirect evaporative cooling mode; and when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature, controlling the air conditioning unit to operate in a dew point type evaporative cooling mode.

Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the various embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the various embodiments provided herein may include at least one of relational databases and non-relational databases. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic units, quantum computing-based data processing logic units, etc., without being limited thereto.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.

Claims

1. A method of controlling an evaporative cooling air conditioning unit, the method comprising:

acquiring the temperature of the air-dried ball after the primary air comes out of the heat exchange core;

when the temperature of the air-out ball of the primary air is lower than the target supply air temperature, controlling the air conditioning unit to operate in an indirect evaporative cooling mode;

and when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature, controlling the air conditioning unit to operate the dew point evaporative cooling mode.

2. The method of claim 1, wherein the evaporative cooling air conditioning unit includes a heat exchange core and a first damper, and wherein the controlling the air conditioning unit to operate the dew point evaporative cooling mode includes:

and controlling the first air valve to be opened, wherein when the first air valve is opened, at least part of air inlets of the wet channels of the heat exchange core body are communicated with air outlets of the dry channels.

3. The method according to claim 2, wherein the method further comprises:

and in the dew-point evaporative cooling mode, adjusting the frequency of a blower of the air conditioning unit and the opening degree of a primary air inlet valve so that the difference between the air output of primary air and the target air output is in a first preset range.

4. A method according to claim 3, characterized in that the method further comprises:

and when the difference value between the air output of the primary air and the target air output is in a first preset range, adjusting the opening of a primary air inlet valve, the opening of a secondary air inlet valve, the frequency of an exhaust fan and the frequency of a water pump of the air conditioning unit so that the difference value between the air-out ball temperature of the primary air and the target air supply temperature is in a second preset range.

5. The method of claim 4, wherein said adjusting the opening of the primary air intake valve, the opening of the secondary air intake valve, the exhaust fan frequency, and the water pump frequency of the air conditioning unit comprises:

increasing the current opening degree of the primary air inlet valve, increasing the opening degree of the secondary air inlet valve, increasing the current exhaust fan frequency and increasing the current water pump frequency.

6. The method of claim 1, wherein the evaporative cooling air conditioning unit includes a heat exchange core and a first damper, the controlling the air conditioning unit to operate in an indirect evaporative cooling mode comprising:

and controlling the first air valve to be closed, wherein when the first air valve is closed, at least part of air inlets of the wet channels and air outlets of the dry channels of the heat exchange core body are not communicated.

7. The method of claim 6, wherein the method further comprises:

and in the indirect evaporative cooling mode, adjusting the frequency of a blower of the air conditioning unit and the opening degree of a primary air inlet valve so that the difference between the output air quantity of primary air and the target output air quantity is in a first preset range.

8. The method of claim 7, wherein the method further comprises:

and when the difference value between the air output of the primary air and the target air output is in a first preset range, adjusting the opening degree of a secondary air inlet air valve, the frequency of an exhaust fan and the frequency of a water pump of the air conditioning unit so that the difference value between the air-out ball temperature of the primary air and the target air supply temperature is in a second preset range.

9. The method of claim 8, wherein said adjusting the opening of the secondary air intake valve, the exhaust fan frequency, and the water pump frequency of the air conditioning unit comprises:

increasing the opening degree of the current secondary air inlet valve, adjusting the current frequency of the exhaust fan to be the frequency corresponding to the preset multiple of the current frequency of the exhaust fan, and increasing the current frequency of the water pump to be the frequency corresponding to the maximum current gear of the water pump; the opening of the secondary air inlet air valve after the secondary air inlet air valve is increased is larger than the minimum opening of the secondary air outlet air valve and smaller than the maximum opening of the secondary air outlet air valve.

10. The method of claim 8, wherein the method further comprises:

And if the difference value between the temperature of the air-out ball of the primary air after adjusting the opening degree of the secondary air inlet air valve, the frequency of the exhaust fan and the frequency of the water pump of the air conditioning unit and the target air supply temperature is out of a second preset range, controlling the first air valve to be opened.

11. The method of claim 1, wherein the obtaining the temperature of the outgoing air-dried spheres after the primary air exits the heat exchange core comprises:

acquiring the air flow of the primary air at a primary air inlet channel, the primary air inlet dry bulb temperature of the primary air after the primary air enters the heat exchange core, and the air flow of the secondary air at a secondary air inlet channel and the secondary air inlet wet bulb temperature of the secondary air after the secondary air enters the heat exchange core; wherein the air conditioning unit comprises the primary air inlet channel and the secondary air inlet channel;

and obtaining the air-out ball temperature of the primary air according to the air inlet ball temperature of the primary air and the air flow of the primary air, and the air inlet wet ball temperature of the secondary air and the air flow of the secondary air.

12. An evaporative cooling air conditioning unit, comprising: the device comprises a controller, a temperature and humidity detection device and a heat exchange core body;

The temperature and humidity detection device is used for acquiring the temperature of the air-dried balls after the primary air comes out of the heat exchange core body;

the controller is used for controlling the air conditioning unit to operate in an indirect evaporative cooling mode when the temperature of the air-out ball of the primary air is lower than the target air supply temperature; and when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature, controlling the air conditioning unit to operate the dew point evaporative cooling mode.

13. The evaporative cooling air conditioning unit according to claim 12, further comprising a primary air intake, a secondary air intake, a primary air intake passage, a secondary air intake passage, and a first air valve,

the primary air inlet channel is used for conveying primary air entering from the primary air inlet to the air inlet of the dry channel of the heat exchange core;

the secondary air inlet channel is used for conveying secondary air entering from the secondary air inlet to the air inlet of the wet channel of the heat exchange core, and the first air valve is arranged between the air inlet of the wet channel and the air outlet of the dry channel of the heat exchange core;

And the controller is also used for controlling the first air valve to be opened when the temperature of the air-out ball of the primary air is not lower than the target supply air temperature, so that at least part of the primary air coming out of the air outlet of the dry channel of the heat exchange core enters at least part of the air inlet of the wet channel of the heat exchange core.

14. An evaporative cooling air conditioning unit according to claim 13, wherein,

the controller is also used for controlling the first air valve to be closed when the temperature of the air-out ball of the primary air is lower than the target air supply temperature.

15. The evaporative cooling air conditioning unit according to claim 13, wherein the heat exchange core includes a core first section, a core second section, and a shield disposed between the core first section and the core second section,

an air inlet of the dry channel of the first section of the core body is communicated with the primary air inlet channel, and an air inlet of the wet channel of the first section of the core body is communicated with the secondary air inlet channel;

the air outlet of the dry channel of the first section of the core body is communicated with the air inlet of the dry channel of the second section of the core body, and the air outlet of the wet channel of the first section of the core body is disconnected with the air inlet of the wet channel of the second section of the core body through the shielding piece; and a bypass return air channel is arranged between the air inlet of the wet channel of the second section of the core body and the air outlet of the dry channel of the second section of the core body when the first air valve is opened.

16. The evaporative cooling air conditioning unit according to claim 15, further comprising an evaporative cooling section, the first core section and the second core section being disposed in the evaporative cooling section, the primary air inlet channel and the secondary air inlet channel being disposed above the evaporative cooling section, the spray device, the water replenishment port, the water drainage port, and the water overflow port being disposed below the evaporative cooling section.

17. The evaporative cooling air conditioning unit according to claim 16, further comprising a blower and an exhaust fan, wherein the first core section comprises a primary air first inlet end, a primary air first outlet end, a secondary air inlet end, and a secondary air outlet end, the second core section comprises a primary air second inlet end, a primary air second outlet end, a primary return air inlet end, and a primary return air outlet end,

the primary air first air inlet end is communicated with the primary air inlet channel, the primary air first air outlet end is communicated with the primary air second air inlet end through the dry channel, and an air supply channel is arranged between the primary air second air outlet end and the air feeder;

The bypass return air channel is arranged between the primary return air outlet end and the first air valve, and is communicated with an air inlet of the wet channel of the second section of the core body through the primary return air inlet end;

the secondary air inlet end is communicated with the secondary air inlet channel, and an exhaust channel is arranged between the secondary air outlet end and the exhaust fan.

18. The evaporative cooling air conditioning unit according to claim 17, further comprising an air supply section provided with the blower, primary air supply damper and the temperature and humidity detection device.

19. The evaporative cooling air conditioning unit according to claim 18, further comprising a first intermediate section disposed between the evaporative cooling section and the air supply section, the first intermediate section including the first air valve, secondary air inlet air valve, and the secondary air inlet channel above.

20. The evaporative cooling air conditioning unit according to claim 19, further comprising an exhaust section provided with the exhaust fan and secondary air exhaust damper.

21. The evaporative cooling air conditioning unit of claim 20, further comprising a second intermediate section disposed between the evaporative cooling section and the exhaust section, the second intermediate section including a primary air intake valve and the primary air intake passage above and a water pump below.