Air conditioning system for fresh air energy-saving machine room and operation method

Abstract

The invention relates to the technical field of air conditioners, in particular to an air conditioning system for a fresh air energy-saving machine room and an operation method. Comprising an outdoor part and an indoor part, the outdoor part comprises a dust removal device and a condenser, and the dust removal device is connected with a fresh air fan; the indoor part comprises a primary filter, a humidifier and an evaporator, an air inlet of the evaporator is connected with a fresh air channel, and the fresh air channel is connected with a fresh air fan through an air pipe; the evaporator is connected with an indoor fan, and an electric heater is arranged between the evaporator and the indoor fan; the humidifier is connected with the fresh air channel; the compressor is located in the outdoor part or the indoor part and connected with the evaporator and the condenser through refrigerant pipes. According to the system, when the outdoor temperature is relatively low, outdoor fresh air with the low temperature is introduced and combined with the air conditioner special for the machine room, on the premise that the indoor temperature and humidity requirements are met, the service life of an outdoor natural cold source is prolonged as much as possible, and the operation energy consumption of the air conditioner special for the machine room is reduced as much as possible.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioning system for a fresh air energy-saving machine room and an operating method thereof. Background Art

[0002] With the accelerated development of industries such as artificial intelligence, cloud computing, and big data, the demands for communication security, information transmission, and data storage in various industries are increasing, which has promoted the rapid development of professional data centers related to communications, signals, and information. However, the process equipment in the data center generates a lot of heat and has high requirements for the indoor temperature and humidity environment. To ensure the normal operation of the process equipment, it is necessary to maintain a relatively stable temperature and humidity in the room.

[0003] In order to meet the requirements of data room for indoor temperature, humidity and cleanliness, extend the service life of electronic components, and maintain the stable and continuous operation of the room, dedicated air conditioners for the room came into being. The dedicated air conditioners for the room adopt an efficient refrigeration system design, with the characteristics of large air volume and small enthalpy difference. They can quickly and effectively remove a large amount of heat load in the room and ensure that the temperature in the room is constant within a range suitable for the operation of electronic equipment. However, in order to ensure the maintenance of the temperature, humidity and cleanliness requirements in the room, dedicated air conditioners for the room usually need to run 24 hours a day throughout the year. Even if energy-saving technologies such as frequency conversion technology, high-efficiency energy-saving motors, and intelligent control are used to reduce energy consumption and operating costs, the overall energy consumption is still high under all-weather and high-load operation.

[0004] The outdoor temperature is relatively low during the transition season, winter and at night. By adopting free cooling systems and natural ventilation, the operating load of the air-conditioning system can be greatly reduced, electricity consumption can be reduced, and energy costs and carbon emissions can be reduced. However, the direct use of natural ventilation and other methods cannot meet the requirements of constant temperature, humidity and cleanliness in the data center.

[0005] A Chinese invention patent with publication number CN101373087A discloses a fresh air integrated energy-saving air conditioning unit for computer rooms. Although this invention patent adds a fresh air system on the basis of the computer room air conditioner, its fresh air system and air conditioning system cannot operate at the same time. When the outdoor temperature is low, the outdoor fresh air is directly introduced into the room without being subjected to air conditioning. Although it can reduce the indoor temperature to achieve air conditioning energy saving, its control accuracy for indoor temperature is low, and when the indoor and outdoor temperature difference is small, the fresh air system cannot effectively eliminate indoor waste heat, and the demand for fresh air volume is large.

[0006] In addition, directly introducing outdoor air will cause the indoor particulate matter concentration to fail to meet the operating requirements of the computer room due to external air quality issues.

[0007] Therefore, the present invention combines the technical characteristics of computer room-specific air conditioners and proposes a fresh air energy-saving computer room-specific air conditioner system. Summary of the invention

[0008] The purpose of the present invention is to provide an air conditioning system and operating method for a fresh air energy-saving computer room. The air conditioning system can make full use of the fresh air with lower temperature in the transition season, winter and night as a natural cold source, while ensuring that the temperature, humidity and cleanliness requirements of the data room are met, thereby greatly shortening the operating time of the compressor of the computer room air conditioner, thereby effectively reducing the operating energy consumption of the computer room air conditioner, and reducing energy costs and carbon emissions.

[0009] The present invention provides an air conditioning system for a fresh air energy-saving machine room, comprising an outdoor part and an indoor part, wherein the outdoor part comprises a dust removal device and a condenser, the air outlet of the dust removal device is connected to a fresh air fan through an air duct, and a condensing fan is provided on one side of the condenser;

[0010] The indoor part includes a primary filter, a humidifier, an evaporator, an electric heater, and an indoor fan. The air inlet of the evaporator is connected to the fresh air channel, and the fresh air channel is connected to the fresh air fan through an air duct; the air outlet of the evaporator is connected to the indoor fan through an air duct, and the electric heater is arranged on the air duct connecting the evaporator and the indoor fan; the air outlet of the indoor fan is in communication with the room, and the air outlet of the indoor fan is also connected to the return air channel, and the air outlet of the return air channel is connected to the fresh air channel of the indoor part; the humidifier is connected to the fresh air channel of the indoor part;

[0011] The device further comprises a compressor, which is located in the outdoor part or the indoor part and is connected to the evaporator and the condenser respectively through a refrigerant pipe.

[0012] Furthermore, when the compressor is located in the indoor part, it is located below the evaporator; when the compressor is located in the outdoor part, it is located on one side of the condenser.

[0013] Furthermore, a first electric fire damper is provided at the upper part of the room where the indoor part is located. The first electric fire damper is automatically closed in case of fire, and a self-hanging louver air outlet is installed on the outside of the first electric fire damper.

[0014] Furthermore, a fresh air inlet is provided at the lower part of the indoor part, the fresh air inlet is connected to the fresh air channel, a fresh air valve and a second electric fire damper are provided at the fresh air inlet; a return air valve is provided at the air outlet of the return air duct.

[0015] Furthermore, the indoor part is provided with two primary filters, and the two primary filters are respectively located at the air outlet of the return air channel and the fresh air inlet.

[0016] Furthermore, an air inlet is provided at the lower side of the outdoor part, and the inlet of the dust removal device is connected to the air inlet through an air duct.

[0017] The present invention provides an operating method of the above-mentioned fresh air energy-saving machine room air conditioning system, comprising the following steps:

[0018] When the outdoor enthalpy value is higher than the indoor enthalpy value, open the indoor return air duct, close the fresh air inlet, close the exhaust vents on the room, adjust the supply air temperature through the compressor, condenser, condensing fan, evaporator, and electric heater to ensure that the supply air temperature meets the indoor temperature requirements, and adjust the humidification amount through the humidifier according to the indoor air relative humidity;

[0019] When the outdoor temperature is lower than the indoor dry-bulb temperature, open the indoor fresh air inlet and the exhaust vents, introduce some fresh air to mix with the return air, and send it into the room after being cooled and dehumidified by the evaporator to eliminate the indoor excess heat; and adjust the supply air temperature through the compressor, condenser, condensing fan, and evaporator, and adjust the indoor relative humidity through the humidifier, and the air with higher temperature in the room is discharged to the outside through the exhaust vents on the room.

[0020] Furthermore, when the humidity of outdoor air is higher than that of indoor air, and the indoor humidity does not need to be lowered, and the direct introduction of indoor air cannot meet the indoor relative humidity requirement, according to the indoor relative humidity, the fresh air duct and the return air duct are opened, and part of the fresh air is introduced to mix with the return air of the air conditioner, and then sent into the room after being cooled and dehumidified by the evaporator, and the indoor temperature and humidity are automatically adjusted, and the air with higher temperature in the room is discharged to the outside through the exhaust vent of the room;

[0021] When the humidity of outdoor air is higher than that of indoor air and the indoor humidity is too low, open the fresh air duct and return air duct, introduce some fresh air to mix with the air-conditioning return air, and the evaporator enters the dry coil mode, and is sent into the room after isohypsum cooling treatment.

[0022] Furthermore, when the outdoor temperature is high and the introduction of outdoor fresh air cannot effectively eliminate the indoor excess heat, the cooling mode is turned on, the fresh air inlet and exhaust vents in the indoor part are closed, the return air duct is opened, and the indoor relative humidity is adjusted through a humidifier.

[0023] Furthermore, the dust removal device achieves self-cleaning by using one of cyclone dust removal, high-pressure air backblowing, and vibration beating; the dust removal device is provided with a self-circulation mode to perform self-cleaning work regularly.

[0024] In summary, compared with the prior art, the present invention has the following advantages:

[0025] The fresh air energy-saving computer room dedicated air conditioning system provided by the present invention controls the amount of fresh air and return air entering the room according to the indoor and outdoor temperature conditions through the set fresh air channel and return air channel, so as to adapt to the outdoor temperature changes, prolong the use time of the outdoor natural cold source as much as possible, and reduce the operating energy consumption of the computer room dedicated air conditioner; the outdoor humidity can be used to humidify the computer room; at the same time, an electric heater is arranged between the evaporator and the indoor fan, which can adjust the temperature of the air entering the room, the set humidifier can adjust the humidity of the air entering the room, and the set primary-effect evaporator can ensure the cleanliness of the air entering the room. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the structure of the air conditioning system in Example 1 of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the air conditioning system in Example 2 of the present invention.

[0029] Explanation of the reference numerals: 1-outdoor part; 101-dust removal device; 102-fresh air fan; 103-condenser; 104-condensing fan; 2-indoor part; 201-fresh air valve; 202-primary filter; 203-humidifier; 204-evaporator; 205-electric heater; 206-indoor fan; 3-compressor; 4-first electric fire damper. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Example 1

[0034] A fresh air energy-saving air conditioning system for a computer room, such as Figure 1 As shown, it includes an outdoor part 1 and an indoor part 2. The outdoor part 1 includes a dust removal device 101, a fresh air fan 102, a condenser 103, a condensing fan 104, and a compressor 3; the indoor part 2 includes a primary filter 202, a humidifier 203, an evaporator 204, an electric heater 205, and an indoor fan 206.

[0035] An air inlet is provided at the lower part of the side wall of the outdoor part 1. The inlet of the dust removal device 101 is connected to the air inlet through an air duct. When the outdoor fresh air is introduced, the dust removal device 101 removes impurities such as dust and solid particles in the outdoor air. The air outlet of the dust removal device 101 is connected to the fresh air fan 102 through an air duct, and the fresh air processed by the dust removal device 101 is sent to the indoor part 2. A condenser 103 is provided above the dust removal device 101. The condenser 103 releases heat to the outside by converting the refrigerant vapor into liquid. A condensing fan 104 and a compressor 3 are provided on one side of the condenser 103. The condensing fan 104 strengthens the heat exchange between the condenser 103 and the outdoor air, so that the heat in the high-temperature and high-pressure refrigerant vapor in the condenser 103 is released to the outdoor air; the two ends of the compressor 3 are respectively connected to the condenser 103 and the evaporator 204 through the refrigerant pipe, which is used to compress and transport the refrigerant vapor and increase the temperature and pressure of the refrigerant.

[0036] A fresh air inlet is provided at the lower part of the side wall of the indoor part 2, and the fresh air inlet is connected to the fresh air fan 102 of the outdoor part 1 through an air duct. A fresh air valve 201 is installed at the fresh air inlet, and the amount of fresh air entering the indoor part 2 is adjusted by controlling the valve opening. A second electric fire damper is also provided on one side of the fresh air valve 201 of the fresh air inlet, and the second electric fire damper is automatically closed when a fire occurs. The fresh air inlet is connected to the fresh air channel, and a humidifier 203 is provided on the fresh air channel. When the relative humidity of the indoor air is low, humidification is performed by the humidifier 203 to achieve control of the indoor relative humidity. The air inlet of the evaporator 204 is connected to the fresh air channel, and the heat exchange between the air and the low-temperature and low-pressure refrigerant inside the evaporator 204 is achieved, and the refrigerant evaporates and absorbs heat to achieve cooling and dehumidification of the air. The air outlet of the evaporator 204 is connected to the indoor fan 206 through an air duct, and the air outlet of the indoor fan 206 is connected to the indoor room to send the treated low-temperature air into the room. An electric heater 205 is provided on the air duct connecting the evaporator 204 and the indoor fan 206. When the outdoor temperature is low and the air supply temperature requirement is still not reached after passing through the evaporator 204, the air is heated by the electric heater 205. The air outlet of the indoor fan 206 is also connected to the return air channel, and the air outlet of the return air channel is connected to the fresh air channel, so that the exhaust air of the indoor fan 206 is sent into the indoor part 2.

[0037] Two primary filters 202 are provided in the indoor part 2, one of which is installed at the air outlet of the return air channel, and the other is installed at the fresh air inlet, to filter the air entering the indoor part 2 and the return air, and remove solid particles, impurities, pollutants, etc. in the fresh air and return air. A return air valve and a fresh air valve 201 are installed at the air outlet and the fresh air inlet of the return air channel, respectively, and the air volume of the return air and the fresh air is adjusted by controlling the valve opening.

[0038] The upper part of the side wall of the room where the indoor part 2 is installed is provided with a first electric fire damper 4, which is automatically closed in case of fire, and a self-hanging louver air outlet is installed outside the first electric fire damper 4 as an exhaust outlet. When the air conditioning unit supplies air to the room, the indoor air pressure increases, and the air with a higher indoor temperature is discharged through the self-hanging louver air outlet.

[0039] The compressor 3 is installed in the outdoor part 1, which has the following advantages:

[0040] (1) Good heat dissipation: Good outdoor air circulation is conducive to the heat dissipation of the compressor, which can effectively improve the working efficiency and service life of the compressor;

[0041] (2) Low safety risk: The high pressure and high temperature generated by the compressor during operation may bring certain safety hazards, especially in a closed or poorly ventilated environment. Placing the compressor outdoors can reduce the safety risks in the data center.

[0042] (3) Reduce indoor heat load: The heat generated by the outdoor part when working will not directly increase the indoor temperature, which is beneficial to improve the overall energy efficiency of the air conditioning system;

[0043] (4) Noise isolation: The compressor is located in the outdoor part, and its operating noise has little impact on the indoor environment, improving indoor comfort;

[0044] (5) Easy maintenance: The outdoor part is relatively fixed and has ample maintenance space, which makes it easy for maintenance personnel to perform maintenance without affecting normal indoor activities;

[0045] (6) Small indoor space occupation: The compressor is installed in the outdoor part, which helps to reduce the size of the indoor part, thereby avoiding the indoor part occupying too much indoor space.

[0046] The operating method of the fresh air energy-saving machine room air conditioning system provided by the present invention comprises the following steps:

[0047] When the outdoor enthalpy value is higher than the indoor enthalpy value, open the return air duct of the indoor part 2, close the fresh air inlet, close the exhaust vents on the room, and adjust the supply air temperature through the compressor 3, condenser 103, condensing fan 104, evaporator 204, and electric heater 205 to ensure that the supply air temperature meets the indoor temperature requirements. Adjust the humidification amount through the humidifier 203 according to the relative humidity of the indoor air.

[0048] When the outdoor temperature is lower than the indoor dry-bulb temperature, open the fresh air inlet of the indoor part 2, open the exhaust port, introduce part of the fresh air to mix with the return air, and send it into the room after cooling and dehumidification by the evaporator 204 to eliminate the indoor residual heat; and adjust the supply air temperature through the compressor 3, condenser 103, condensing fan 104, and evaporator 204, and adjust the indoor relative humidity through the humidifier 203, and the air with higher temperature in the room is discharged to the outside through the exhaust port on the room.

[0049] When the humidity content of outdoor air is higher than that of indoor air and there is no need to lower the humidity indoors, and directly introducing it into the room cannot meet the indoor relative humidity requirements, the fresh air duct and the return air duct are opened according to the indoor relative humidity, and part of the fresh air is introduced to mix with the air-conditioning return air, which is then sent into the room after being cooled and dehumidified by the evaporator 204. The indoor temperature and humidity are automatically adjusted, and the air with higher temperature in the room is discharged to the outside through the exhaust vent of the room.

[0050] When the humidity of outdoor air is higher than that of indoor air and the indoor humidity is too low, the fresh air duct and the return air duct are opened to introduce part of the fresh air and mix it with the air-conditioning return air. The evaporator 204 enters the dry coil mode and is sent indoors after isohypsum cooling treatment.

[0051] When the outdoor temperature is high and the introduction of outdoor fresh air cannot effectively eliminate the indoor excess heat, the cooling mode is turned on, the fresh air inlet and exhaust vent of the indoor part 2 are closed, the return air duct is opened, and the indoor relative humidity is adjusted through the humidifier 203.

[0052] The air-conditioning system provided by the present invention makes intelligent decisions to start fresh air cooling, fresh air humidification, fresh air dehumidification, fresh air energy saving, self-circulation and other operating modes through parameters such as indoor temperature, indoor humidity, outdoor temperature, and outdoor humidity.

[0053] The dust removal device 101 uses a method of cyclone dust removal, high-pressure air back blowing, and vibration beating to achieve self-cleaning. The dust removal device 101 is provided with a self-circulation mode to perform self-cleaning work regularly.

[0054] Example 2

[0055] A fresh air energy-saving air conditioning system for a computer room, such as Figure 2 As shown, the technical solution in this embodiment is basically consistent with that in Embodiment 1, except that the compressor 3 is installed in the indoor part 2 and is located below the evaporator 204 .

[0056] Installing the compressor 3 in the indoor part 2 has the following advantages:

[0057] (1) Strong spatial adaptability: For some places with limited outdoor installation conditions, installing the compressor indoors can effectively control the size of the outdoor unit, thereby better adapting to outdoor installation conditions;

[0058] (2) Little impact from outdoor environment: The outdoor environment is changeable. Factors such as temperature, humidity, wind and rain may affect the normal operation and life of the compressor. Placing the compressor indoors can effectively reduce the impact of the outdoor environment on the compressor.

[0059] The fresh air energy-saving computer room dedicated air conditioning system provided by the present invention, when the outdoor temperature is relatively low in the transition season, winter and night, by introducing outdoor fresh air with a lower temperature, combined with the computer room dedicated air conditioner, while ensuring the indoor temperature and humidity requirements, the use time of the outdoor natural cold source is extended as much as possible. Under the premise of ensuring that the temperature, humidity and cleanliness requirements of the data room are met, the low-temperature fresh air in the transition season, winter and night can be fully utilized as a natural cold source, which greatly shortens the operating time of the compressor of the computer room dedicated air conditioner, effectively reduces the operating energy consumption of the computer room dedicated air conditioner, and thus reduces energy costs and carbon emissions.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fresh air energy-saving air conditioning system for a computer room, characterized in that: It comprises an outdoor part (1) and an indoor part (2), the outdoor part (1) comprising a dust removal device (101) and a condenser (103), the air outlet of the dust removal device (101) being connected to a fresh air fan (102) via an air duct, and a condensing fan (104) being provided on one side of the condenser (103); The indoor part (2) comprises a primary filter (202), a humidifier (203), an evaporator (204), an electric heater (205), and an indoor fan (206); the air inlet of the evaporator (204) is connected to a fresh air channel, and the fresh air channel is connected to the fresh air fan (102) through an air duct; the air outlet of the evaporator (204) is connected to the indoor fan (206) through an air duct, and the electric heater (205) is provided on the air duct connecting the evaporator (204) and the indoor fan (206); the air outlet of the indoor fan (206) is in communication with the room, and the air outlet of the indoor fan (206) is also connected to a return air channel, and the air outlet of the return air channel is connected to the fresh air channel of the indoor part (2); the humidifier (203) is connected to the fresh air channel of the indoor part (2); It also includes a compressor (3), which is located in the outdoor part (1) or the indoor part (2), and the compressor (3) is connected to the evaporator (204) and the condenser (103) respectively through a refrigerant pipe.

2. The system according to claim 1, characterized in that When the compressor (3) is located in the indoor part (2), it is located below the evaporator (204); when the compressor (3) is located in the outdoor part (1), it is located on one side of the condenser (103).

3. The system according to claim 1, characterized in that A first electric fire damper (4) is also provided at the upper part of the room where the indoor part (2) is located. The first electric fire damper (4) is automatically closed in case of fire, and a self-hanging shutter air outlet is installed outside the first electric fire damper (4).

4. The system according to claim 1, characterized in that A fresh air inlet is provided at the lower part of the indoor part (2), the fresh air inlet is connected to the fresh air channel, a fresh air valve (201) and a second electric fire damper are provided at the fresh air inlet; a return air valve is provided at the air outlet of the return air duct.

5. The system according to claim 1, characterized in that The indoor part (2) is provided with two primary filters (202), and the two primary filters (202) are respectively located at the air outlet of the return air channel and the fresh air inlet.

6. The system according to claim 1, characterized in that An air inlet is provided at the lower side of the outdoor part (1), and the inlet of the dust removal device (101) is connected to the air inlet via an air duct.

7. An operating method of a fresh air energy-saving machine room air conditioning system according to any one of claims 1 to 6, characterized in that: The following steps are involved: When the outdoor enthalpy value is higher than the indoor enthalpy value, the return air duct of the indoor part (2) is opened, the fresh air inlet is closed, the exhaust vent on the room is closed, and the supply air temperature is adjusted through the compressor (3), condenser (103), condensing fan (104), evaporator (204), and electric heater (205) to ensure that the supply air temperature meets the indoor temperature requirement, and the humidification amount is adjusted through the humidifier (203) according to the relative humidity of the indoor air; When the outdoor temperature is lower than the indoor dry-bulb temperature, the fresh air inlet of the indoor part (2) is opened, the exhaust port is opened, part of the fresh air is introduced and mixed with the return air, and then sent into the room after being cooled and dehumidified by the evaporator (204) to eliminate the indoor excess heat; the supply air temperature is adjusted by the compressor (3), condenser (103), condensing fan (104), and evaporator (204), and the indoor relative humidity is adjusted by the humidifier (203), and the air with higher temperature in the room is discharged to the outside through the exhaust port on the room.

8. The operating method according to claim 7, characterized in that: When the humidity of outdoor air is higher than that of indoor air and the indoor humidity does not need to be lowered, and the direct introduction of air into the room cannot meet the indoor relative humidity requirement, the fresh air duct and the return air duct are opened according to the indoor relative humidity, and part of the fresh air is introduced to mix with the return air of the air conditioner, and then sent into the room after being cooled and dehumidified by the evaporator (204), and the indoor temperature and humidity are automatically adjusted, and the air with higher temperature in the room is discharged to the outside through the exhaust vent of the room; When the humidity of outdoor air is higher than that of indoor air and the indoor humidity is too low, the fresh air duct and the return air duct are opened to introduce part of the fresh air and mix it with the air-conditioning return air. The evaporator (204) enters the dry coil mode and isohumidification cooling treatment is performed before it is sent indoors.

9. The operating method according to claim 7, characterized in that: When the outdoor temperature is high and the introduction of outdoor fresh air cannot effectively eliminate the indoor excess heat, the cooling mode is turned on, the fresh air inlet and exhaust vent of the indoor part (2) are closed, the return air duct is opened, and the indoor relative humidity is adjusted through the humidifier (203).

10. The operating method according to claim 7, characterized in that: The dust removal device (101) realizes self-cleaning by using one of cyclone dust removal, high-pressure air back-blowing, and vibration beating; the dust removal device (101) is provided with a self-circulation mode to perform self-cleaning work regularly.

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