A cabinet air conditioner anti-condensation control method, device and cabinet air conditioner

Abstract

The present invention discloses a cabinet air conditioner anti-condensation control method, device and cabinet air conditioner. The cabinet air conditioner anti-condensation control method comprises the following steps: obtaining the return air temperature and supply air temperature of the indoor unit, as well as the cabinet temperature and cabinet humidity inside the cabinet; calculating the dew point temperature of the air inside the cabinet according to the cabinet temperature and the cabinet humidity; comparing the supply air temperature with the dew point temperature, and if the supply air temperature is less than or equal to the dew point temperature, entering an anti-condensation control mode; in the anti-condensation control mode, comparing the return air temperature with the set return air temperature, and according to the comparison result, increasing the fan speed of the indoor unit and / or reducing the compressor operating frequency of the outdoor unit to increase the supply air temperature.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and in particular relates to a cabinet air conditioner anti-condensation control method and device, and a cabinet air conditioner. Background Art

[0002] Cabinet air conditioners are specially designed for applications in the communications field, such as solving heat dissipation problems in outdoor communication cabinets, wireless outdoor cabinet base stations, battery cabinets, etc. They are mainly used to remove the heat generated by electrical components consuming electricity, provide an ideal temperature and humidity environment for various cabinets, and isolate dust and corrosive gases in the external environment, extend the service life of electrical components, and improve the reliability of machine system operation. The products are suitable for electrical control boxes, communications, communication equipment, data processing boxes, and heavy electrical equipment control boxes.

[0003] Existing cabinet air conditioners include a cabinet and an air conditioner, which is placed inside the cabinet and used to cool the inside of the cabinet. At present, data centers that use cabinet air conditioners are all deployed in a segmented manner, that is, in the early stage of application, there are few server devices in the cabinet and the load is small, while in the later stage of application, as the server devices in the cabinet increase, the load increases. When designing the cabinet air conditioner, the cooling capacity of the air conditioner is matched according to the maximum load in the cabinet. Therefore, in the early stage of data center application and in a low-load application environment, when the cabinet air conditioner is used for cooling, the air conditioner is prone to condensation. The condensation mainly condenses on the surface of the air conditioner panel or the air outlet. When there is a lot of condensation, water droplets will drip from the panel surface of the air conditioner or blow out from the air outlet of the air conditioner when air is supplied, which makes the equipment in the cabinet at risk. In order to prevent condensation on the air supply outlet of the cabinet air conditioner, the commonly used anti-condensation method for cabinet air conditioners is to detect the return air temperature of the return air outlet of the air conditioner and the supply air temperature of the air supply outlet of the air conditioner, and then calculate the difference between the return air temperature and the supply air temperature. When the difference is greater than the preset value, it is determined that there is a condensation risk. When it is determined that there is a condensation risk, the operating frequency of the compressor of the air conditioner outdoor unit is reduced or the compressor is turned off to prevent condensation. Although condensation can be prevented by changing the operating frequency of the compressor or turning off the compressor, such a control method is likely to cause large fluctuations in the supply air temperature, and cannot accurately and steadily increase the supply air temperature, which is easy to destroy the balance of the temperature and humidity environment inside the cabinet and cause damage to the equipment inside the cabinet. Summary of the invention

[0004] The object of the present invention is to provide a cabinet air conditioner anti-condensation control method, device and cabinet air conditioner which can accurately and steadily increase the air supply temperature and effectively prevent the generation of condensation.

[0005] The technical solution of the present invention is achieved in this way:

[0006] The first object of the present invention is to provide a cabinet air conditioner anti-condensation control method, the cabinet air conditioner includes a cabinet and an air conditioner, the air conditioner includes an indoor unit and an outdoor unit; the control method includes the following steps: obtaining the return air temperature and supply air temperature of the indoor unit, as well as the cabinet temperature and cabinet humidity inside the cabinet; calculating the dew point temperature of the air inside the cabinet according to the cabinet temperature and the cabinet humidity; comparing the supply air temperature with the dew point temperature, if the supply air temperature is less than or equal to the dew point temperature, entering the anti-condensation control mode; in the anti-condensation control mode, comparing the return air temperature with the set return air temperature, and according to the comparison result, increasing the fan speed of the indoor unit and / or reducing the compressor operating frequency of the outdoor unit to increase the supply air temperature.

[0007] Preferably, the control method further includes the following steps: when the supply air temperature increases to meet the exit condition of the anti-condensation control mode, exiting the anti-condensation control mode; after exiting the anti-condensation control mode, adjusting the air conditioner according to the set operating parameters.

[0008] Preferably, the exit condition of the anti-condensation control mode refers to that the supply air temperature is greater than the sum of the dew point temperature and the first preset temperature deviation value; the set operating parameters include the preset return air temperature or supply air temperature under normal operating conditions, and the set target temperature.

[0009] Preferably, if the return air temperature is greater than or equal to the set return air temperature, the rotation speed of the fan is increased to a preset maximum rotation speed of the fan, and the current operating frequency of the compressor is maintained.

[0010] Preferably, after the fan has been running continuously at a preset maximum speed for t1 time, if the supply air temperature is still less than or equal to the dew point temperature, the fan continues to run at the maximum speed, and at the same time, the operating frequency of the compressor is periodically reduced until the supply air temperature increases to meet the exit condition of the anti-condensation control mode.

[0011] Preferably, if the return air temperature is lower than the set return air temperature, the fan is maintained at its current speed, and the differences ΔT1, ΔT2 and ΔT3 between the set return air temperature and the second preset temperature deviation value, the third preset temperature deviation value and the fourth preset temperature deviation value are calculated respectively, wherein ΔT1>ΔT2>ΔT3; the return air temperature is compared with ΔT1, ΔT2 and ΔT3, and the operating frequency of the compressor is reduced according to the comparison result.

[0012] Preferably, when ΔT1>the return air temperature, the current speed of the fan is maintained and the operating frequency of the compressor is periodically reduced; when ΔT2>the return air temperature, the operating frequency of the compressor is reduced to the preset minimum operating frequency of the compressor, and after the compressor runs at the preset minimum operating frequency for t2 time, if the return air temperature is still less than ΔT2, the electric heating mode of the indoor unit is turned on, and the compressor continues to run at the preset minimum operating frequency; when ΔT3>the return air temperature, after the compressor runs at the preset minimum operating frequency for t3 time, the electric heating mode of the compressor and the indoor unit is turned off.

[0013] Preferably, when ΔT1>the return air temperature, the operating frequency of the compressor is periodically reduced until the supply air temperature increases to meet the exit condition of the anti-condensation control mode; when ΔT2>the return air temperature, the compressor operates at a preset minimum operating frequency until the supply air temperature increases to meet the exit condition of the anti-condensation control mode or after turning on the electric heating mode of the indoor unit, the compressor continues to operate at the preset minimum operating frequency until the supply air temperature increases to meet the exit condition of the anti-condensation control mode; when ΔT3>the return air temperature, the compressor and the electric heating mode of the indoor unit are turned off, and the current speed of the fan is maintained until the supply air temperature increases to meet the exit condition of the anti-condensation control mode.

[0014] The second object of the present invention is to provide a cabinet air conditioner anti-condensation control device, the control device includes a first temperature sensor, a second temperature sensor, a third temperature sensor, a humidity sensor and a controller, the first temperature sensor is arranged at the return air outlet of the indoor unit to obtain the return air temperature of the indoor unit, the second temperature sensor is arranged at the supply air outlet of the indoor unit to obtain the supply air temperature of the indoor unit, the third temperature sensor is arranged in the cabinet to obtain the cabinet temperature inside the cabinet, the humidity sensor is arranged in the cabinet to obtain the cabinet humidity inside the cabinet, the controller is used to perform data processing on the return air temperature, the supply air temperature, the cabinet temperature and the cabinet humidity, and then compare the supply air temperature with the dew point temperature, and judge whether to enter the anti-condensation control mode according to the comparison result, after entering the anti-condensation control mode, compare the return air temperature with the set return air temperature, and increase the fan speed of the indoor unit and / or reduce the compressor operating frequency of the outdoor unit according to the comparison result.

[0015] A third object of the present invention is to provide a cabinet air conditioner, the cabinet air conditioner comprising the cabinet air conditioner anti-condensation control device described above.

[0016] Compared with the prior art, the present invention has the following advantages: the control method provided by the present invention determines whether it is necessary to enter the anti-condensation control mode by comparing the supply air temperature with the dew point temperature. After entering the anti-condensation control mode, the return air temperature is compared with the set return air temperature, and the fan speed of the indoor unit is increased and / or the operating frequency of the compressor of the outdoor unit is reduced according to the comparison result to increase the supply air temperature. By increasing the fan speed of the indoor unit and / or reducing the operating frequency of the compressor of the outdoor unit, the supply air temperature can be accurately and smoothly increased, and the precise control of the supply air temperature of the indoor unit is achieved, and the supply air temperature of the indoor unit is kept always higher than the dew point temperature, thereby effectively preventing the occurrence of condensation. In addition, by comparing the supply air temperature with the dew point temperature to determine whether it is necessary to enter the anti-condensation control mode, it is possible to accurately determine whether condensation is generated at the air supply outlet of the indoor unit, so as to prevent the condensation from condensing into water droplets and blowing out when the air conditioner is supplying air, thereby better protecting the equipment in the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention provides a flow chart of the control method.

[0018] Figure 2 This is a logic block diagram of the control method provided by the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of the control device provided by the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1:

[0022] like Figure 1 and Figure 2 As shown, this embodiment provides a cabinet air conditioner anti-condensation control method, the cabinet air conditioner includes a cabinet and an air conditioner, the air conditioner includes an indoor unit and an outdoor unit, the indoor unit is provided with a return air outlet and an air supply outlet, and the air conditioner is in refrigeration operation. The method is executed by the cabinet air conditioner anti-condensation control device provided by the second embodiment of the present invention, the device is implemented by software and / or hardware, and the device can be integrated in the air conditioner.

[0023] like Figure 1 As shown, the control method includes the following steps:

[0024] Step 1: Obtain the return air temperature and supply air temperature of the indoor unit, as well as the cabinet temperature and cabinet humidity inside the cabinet.

[0025] Specifically, the return air temperature, the supply air temperature, the cabinet temperature and the cabinet humidity are respectively acquired by a first temperature sensor 1, a second temperature sensor 2, a third temperature sensor 3 and a humidity sensor 4 of a control device.

[0026] Step 2: Calculate the dew point temperature of the air inside the cabinet according to the cabinet temperature and the cabinet humidity.

[0027] Specifically, the dew point temperature is calculated using the following formula:

[0028]

[0029]

[0030] Wherein, Td is the cabinet dew point temperature, a is the first preset constant and a=17.27, b is the second preset constant and b=237.7, T is the cabinet temperature, and RH is the cabinet humidity.

[0031] Step 3: Compare the supply air temperature with the dew point temperature. If the supply air temperature is less than or equal to the dew point temperature, enter the anti-condensation control mode.

[0032] Step 4: In the anti-condensation control mode, the return air temperature is compared with the set return air temperature, and the fan speed of the indoor unit is increased and / or the compressor operating frequency of the outdoor unit is reduced to increase the supply air temperature according to the comparison result.

[0033] Step 5: When the air supply temperature increases to meet the exit condition of the anti-condensation control mode, the anti-condensation control mode is exited; after exiting the anti-condensation control mode, the air conditioner is adjusted according to the set operating parameters.

[0034] The control method provided by the present invention determines whether it is necessary to enter the anti-condensation control mode by comparing the supply air temperature with the dew point temperature. After entering the anti-condensation control mode, the return air temperature is compared with the set return air temperature, and the fan speed of the indoor unit is increased and / or the operating frequency of the compressor of the outdoor unit is reduced according to the comparison result to increase the supply air temperature. By increasing the fan speed of the indoor unit and / or reducing the operating frequency of the compressor of the outdoor unit, the supply air temperature can be accurately and smoothly increased, and the precise control of the supply air temperature of the indoor unit can be achieved, and the supply air temperature of the indoor unit is kept always higher than the dew point temperature, thereby effectively preventing the occurrence of condensation. In addition, by comparing the supply air temperature with the dew point temperature to determine whether it is necessary to enter the anti-condensation control mode, it is possible to accurately determine whether condensation is generated at the air supply outlet of the indoor unit, so as to prevent the condensation from condensing into water droplets and blowing out when the air conditioner is supplying air, thereby better protecting the equipment in the cabinet.

[0035] Specifically, the exit condition of the anti-condensation control mode refers to that the supply air temperature is greater than the sum of the dew point temperature and the first preset temperature deviation value; the set operating parameters include the preset return air temperature or supply air temperature under normal operating conditions, and the set target temperature.

[0036] It should be noted that the normal operating state refers to the state when the air conditioner is operating in normal cooling mode. The preset return air temperature or supply air temperature is set by the processor CPU of the controller of the control device. The set target temperature refers to the cooling temperature of the air conditioner set by the user through a remote control or other device.

[0037] As a preferred solution for step 4, Figure 2 As shown, if the return air temperature is greater than or equal to the set return air temperature, the speed of the fan is increased to the preset maximum speed of the fan, and the current operating frequency of the compressor is maintained until the supply air temperature is increased to meet the exit condition of the anti-condensation control mode. The supply air volume of the air conditioner indoor unit is increased by increasing the speed of the fan, thereby increasing the supply air temperature and avoiding the supply air temperature being lower than the dew point temperature. In this state, considering the problem of heavy load, while maintaining the current operating frequency of the compressor, the air volume is increased first, so that the air conditioning cooling capacity can be increased while the supply air temperature is increased, which can effectively achieve the purpose of anti-condensation and avoid the influence of the fluctuation of the compressor operating frequency on the air conditioning cooling capacity.

[0038] Further preferably, after the fan continuously runs at the preset maximum speed for t1 time, if the supply air temperature is still less than or equal to the dew point temperature, the fan continues to run at the maximum speed, and at the same time, periodically reduces the operating frequency of the compressor until the supply air temperature increases to meet the exit condition of the anti-condensation control mode. This mode is intended to speed up the increase in supply air temperature, thereby better achieving anti-condensation control. In this embodiment, the fan continuously runs at the preset maximum speed for t1 time means that the fan continuously runs at the preset maximum speed for 15 minutes or more, and periodically reduces the operating frequency of the compressor means that the operating frequency of the compressor is reduced by 2 Hz to 3 Hz every 40 seconds.

[0039] As another preferred solution of step 4, Figure 2 As shown, if the return air temperature is lower than the set return air temperature, the fan is maintained at its current speed, and the differences ΔT1, ΔT2 and ΔT3 between the set return air temperature and the second preset temperature deviation value, the third preset temperature deviation value and the fourth preset temperature deviation value are calculated respectively, wherein the second preset temperature deviation value is smaller than the third preset temperature deviation value and smaller than the fourth preset temperature deviation value, so that ΔT1>ΔT2>ΔT3; compare the return air temperature with ΔT1, ΔT2 and ΔT3, and reduce the operating frequency of the compressor according to the comparison result; in this embodiment, the set return air temperature is set by the processor CPU of the controller of the control device, the second preset temperature deviation value has a value range of 2°C-3°C, the third preset temperature deviation value has a value range of 3°C-4°C, and the fourth preset temperature deviation value has a value range of 5°C-6°C.

[0040] Specifically, when ΔT1>the return air temperature, the current speed of the fan is maintained, and the operating frequency of the compressor is periodically reduced; when ΔT2>the return air temperature, the operating frequency of the compressor is reduced to the preset minimum operating frequency of the compressor, and after the compressor runs at the preset minimum operating frequency for t2 time, if the return air temperature is still less than ΔT2, the electric heating mode of the indoor unit is turned on, and the compressor continues to run at the preset minimum operating frequency; when ΔT3>the return air temperature, after the compressor runs at the preset minimum operating frequency for t3 time, the electric heating mode of the compressor and the indoor unit is turned off. At this time, the air conditioner maintains the fan. The machine is running at the current speed, that is, the air conditioner is running in the air supply mode. This embodiment compares multiple deviation values ​​in order to achieve a phased increase in the air supply temperature of the air conditioner indoor unit. In this state, the current speed of the fan is maintained, and the supply air temperature is steadily increased while ensuring the cooling capacity of the air conditioner by periodically reducing the operating frequency of the compressor and turning on the electric heating mode. In addition, according to the time requirement of the shutdown operation at the minimum operating frequency of the compressor, the compressor shutdown control is finally performed. After the compressor is shut down, the current speed of the fan is still maintained to ensure the circulating air volume of the cabinet, avoid local hot spots caused by poor airflow organization, and avoid the influence of the start and stop of the compressor on the fluctuation of the supply air temperature.

[0041] More specifically, the periodically reducing the operating frequency of the compressor means that the operating frequency of the compressor is reduced by 5 Hz every 40 seconds; the t2 time is 2 minutes; and the t3 time is 4 minutes.

[0042] Further preferably, when ΔT1>the return air temperature, the operating frequency of the compressor is periodically reduced until the supply air temperature increases to meet the exit condition of the anti-condensation control mode; when ΔT2>the return air temperature, the compressor operates at a preset minimum operating frequency until the supply air temperature increases to meet the exit condition of the anti-condensation control mode or after turning on the electric heating mode of the indoor unit, the compressor continues to operate at the preset minimum operating frequency until the supply air temperature increases to meet the exit condition of the anti-condensation control mode; when ΔT3>the return air temperature, the compressor and the electric heating mode of the indoor unit are turned off, and the current speed of the fan is maintained until the supply air temperature increases to meet the exit condition of the anti-condensation control mode.

[0043] Embodiment 2:

[0044] like Figure 3As shown, this embodiment provides a cabinet air conditioner anti-condensation control device, the control device includes a first temperature sensor 1, a second temperature sensor 2, a third temperature sensor 3, a humidity sensor 4 and a controller 5, the first temperature sensor 1, the second temperature sensor 2, the third temperature sensor 3, the humidity sensor 4 are electrically connected to the controller 5 respectively, the controller 5 is electrically connected to the fan of the indoor unit and the compressor of the outdoor unit of the air conditioner, the first temperature sensor 1 is arranged at the return air outlet of the indoor unit to obtain the return air temperature of the indoor unit, the second temperature sensor 2 is arranged at the supply air outlet of the indoor unit to obtain the supply air temperature of the indoor unit, the third temperature sensor 3 is arranged in the cabinet to obtain the cabinet temperature inside the cabinet, the The humidity sensor 4 is arranged in the cabinet to obtain the cabinet humidity inside the cabinet. The controller 5 is used to compare the supply air temperature with the dew point temperature after data processing of the return air temperature, the supply air temperature, the cabinet temperature and the cabinet humidity, and judge whether to enter the anti-condensation control mode according to the comparison result. After entering the anti-condensation control mode, compare the return air temperature with the set return air temperature, and increase the fan speed of the indoor unit and / or reduce the compressor operating frequency of the outdoor unit according to the comparison result. The controller 5 includes a processor CPU, and the processor CPU has a calculation program for calculating the dew point temperature, the sum of the dew point temperature and the first preset temperature deviation value, ΔT1, ΔT2 and ΔT3.

[0045] Embodiment three:

[0046] This embodiment provides a cabinet air conditioner, and the cabinet air conditioner includes the cabinet air conditioner anti-condensation control device described in the second embodiment.

[0047] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are all equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A cabinet air conditioner anti-condensation control method, the cabinet air conditioner comprises a cabinet and an air conditioner, and the air conditioner comprises an indoor unit and an outdoor unit; It is characterized in that The control method comprises the following steps: Obtaining the return air temperature and supply air temperature of the indoor unit, as well as the cabinet temperature and cabinet humidity inside the cabinet; Calculating the dew point temperature of the air inside the cabinet according to the cabinet temperature and the cabinet humidity; Comparing the air supply temperature with the dew point temperature, if the air supply temperature is less than or equal to the dew point temperature, entering an anti-condensation control mode; In the anti-condensation control mode, the return air temperature is compared with the set return air temperature, and according to the comparison result, the fan speed of the indoor unit is increased and / or the compressor operating frequency of the outdoor unit is reduced to increase the supply air temperature; If the return air temperature is lower than the set return air temperature, the fan is maintained at its current speed, and the differences ΔT1, ΔT2 and ΔT3 between the set return air temperature and the second preset temperature deviation value, the third preset temperature deviation value and the fourth preset temperature deviation value are calculated, respectively, wherein ΔT1>ΔT2>ΔT3; The return air temperature is compared with ΔT1, ΔT2 and ΔT3, and the operating frequency of the compressor is reduced according to the comparison result.

2. A cabinet air conditioner anti-condensation control method according to claim 1, Features: The control method further comprises the following steps: When the air supply temperature increases to meet the exit condition of the anti-condensation control mode, the anti-condensation control mode is exited; after exiting the anti-condensation control mode, the air conditioner is adjusted according to the set operating parameters.

3. A cabinet air conditioner anti-condensation control method according to claim 2, Features: The exit condition of the anti-condensation control mode refers to that the supply air temperature is greater than the sum of the dew point temperature and the first preset temperature deviation value; the set operating parameters include the preset return air temperature or supply air temperature under normal operating conditions, and the set target temperature.

4. A cabinet air conditioner anti-condensation control method according to claim 2 or 3, Features: If the return air temperature is greater than or equal to the set return air temperature, the fan speed is increased to the preset maximum fan speed, and the compressor is maintained at the current operating frequency until the supply air temperature is increased to meet the exit condition of the anti-condensation control mode.

5. A cabinet air conditioner anti-condensation control method according to claim 4, Features: After the fan runs continuously at the preset maximum speed for t1 time, if the supply air temperature is still less than or equal to the dew point temperature, the fan continues to run at the maximum speed and, at the same time, periodically reduces the operating frequency of the compressor until the supply air temperature increases to meet the exit condition of the anti-condensation control mode.

6. A cabinet air conditioner anti-condensation control method according to claim 1, Features: When ΔT1>the return air temperature, the current speed of the fan is maintained, and the operating frequency of the compressor is periodically reduced; When ΔT2>the return air temperature, the operating frequency of the compressor is reduced to the preset minimum operating frequency of the compressor. After the compressor runs at the preset minimum operating frequency for t2 time, if the return air temperature is still less than ΔT2, the electric heating mode of the indoor unit is turned on, and the compressor continues to run at the preset minimum operating frequency; When ΔT3>the return air temperature, the compressor runs at a preset minimum operating frequency for a period of time t3, and then the electric heating mode of the compressor and the indoor unit is turned off.

7. A cabinet air conditioner anti-condensation control method according to claim 6, Features: When ΔT1>the return air temperature, the operating frequency of the compressor is periodically reduced until the supply air temperature increases to meet the exit condition of the anti-condensation control mode; When ΔT2>the return air temperature, the compressor operates at a preset minimum operating frequency until the supply air temperature increases to meet the exit condition of the anti-condensation control mode or after the electric heating mode of the indoor unit is turned on, the compressor continues to operate at a preset minimum operating frequency until the supply air temperature increases to meet the exit condition of the anti-condensation control mode; When ΔT3>the return air temperature, the electric heating mode of the compressor and the indoor unit is turned off, and the current speed of the fan is maintained until the supply air temperature increases to meet the exit condition of the anti-condensation control mode.

8. A cabinet air conditioner anti-condensation control device, the cabinet air conditioner comprising a cabinet and an air conditioner, the air conditioner comprising an indoor unit and an outdoor unit, the indoor unit being provided with a return air outlet and an air supply outlet, It is characterized in that The control device is used to execute the cabinet air conditioner anti-condensation control method according to claims 1-7, and the control device includes: a first temperature sensor, the first temperature sensor being disposed at the return air outlet of the indoor unit to obtain the return air temperature of the indoor unit; a second temperature sensor, the second temperature sensor being arranged at the air outlet of the indoor unit to obtain the air supply temperature of the indoor unit; a third temperature sensor, the third temperature sensor being arranged in the cabinet and used for obtaining the cabinet temperature inside the cabinet; A humidity sensor is disposed in the cabinet to obtain cabinet humidity inside the cabinet; The controller is used to compare the supply air temperature with the dew point temperature after performing data processing on the return air temperature, the supply air temperature, the cabinet temperature and the cabinet humidity, and judge whether it is necessary to enter the anti-condensation control mode according to the comparison result; after entering the anti-condensation control mode, compare the return air temperature with the set return air temperature, and increase the fan speed of the indoor unit and / or reduce the compressor operating frequency of the outdoor unit according to the comparison result.

9. A cabinet air conditioner, It is characterized in that It includes the cabinet air conditioner anti-condensation control device as described in claim 8.

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