Clean air conditioner fresh air processor with energy-saving box and working method thereof

Abstract

The application discloses a clean air conditioner fresh air processor with an energy-saving box and a working method thereof. The clean air conditioner fresh air processor comprises a fresh air pipe, a fresh air treatment unit, an energy-saving box and an exhaust pipe. The fresh air pipe is connected to an air inlet section of the fresh air treatment unit through a first air valve and is connected to an inlet of a heat exchange pipe group of the energy-saving box through a second air valve. The energy-saving box comprises a middle chamber which is provided with the heat exchange pipe group. An outlet of the heat exchange pipe group is connected to the air inlet section of the fresh air treatment unit. The middle chamber is divided into a first chamber and a second chamber by an openable and closable movable partition. An openable and closable exhaust inlet and an exhaust outlet are arranged on the first chamber. The exhaust inlet is connected to the exhaust pipe connected to a clean room. Air flow of an efficiency increasing section of the fresh air treatment unit is introduced into the middle chamber of the energy-saving box from the second chamber and is introduced out of the middle chamber to a reheater from the second chamber. The working method realizes fresh air-fresh air heat exchange and fresh air-exhaust air heat exchange by whether the movable partition is closed. The application can save energy consumption of a clean air conditioning system.

Description

Technical Field

[0001] This invention relates to a fresh air processor and its working method, belonging to the field of clean air conditioning technology. Background Technology

[0002] The power consumption per unit area of ​​a process-oriented cleanroom air conditioning system is approximately 300–1300 W / m². 2 It is far higher than the area energy consumption of ordinary comfort air conditioning systems.

[0003] In existing technologies, some cleanroom air conditioning energy-saving control systems adjust the opening of electric cooling valves based on cleanroom wall temperature, indoor humidity, and temperature control, utilizing return air to regulate the indoor environment during shutdown periods and save energy. Other constant temperature and humidity cleanroom air conditioning energy-saving systems utilize return air to solve the problem of energy waste caused by heat and cold offsetting during the cooling, dehumidification, and reheating processes of constant temperature and humidity air conditioning units. Both of these technologies utilize indoor return air to reduce the overall energy consumption of the cleanroom and are only suitable for cleanroom air conditioning systems with centralized return air. However, electronic factories with high cleanliness requirements generally use combined fresh air handling units (MAU) + fan filter units (FFU) + dry cooling coils (DCC) air conditioning systems, where return air is treated separately in the return air duct; the above two technologies are not applicable in these cases. Summary of the Invention

[0004] In view of the above-mentioned defects in the prior art, the present invention aims to provide a clean air conditioning fresh air processor with an energy-saving box, and another objective of the present invention is to provide a working method of the clean air conditioning fresh air processor with an energy-saving box, thereby solving the problem of high energy consumption in clean air conditioning systems.

[0005] The technical solution of this invention is as follows: A clean air conditioning fresh air processor with an energy-saving box includes a fresh air duct, a fresh air handling unit, an energy-saving box, and an exhaust duct. The fresh air duct is connected to the air inlet section of the fresh air handling unit through a first air valve. The fresh air duct leads initial fresh air to the inlet of the heat exchange tube assembly in the energy-saving box through a second air valve. The energy-saving box includes a central chamber, which is equipped with the heat exchange tube assembly. The outlet of the heat exchange tube assembly is led to the air inlet section of the fresh air handling unit. The central chamber is equipped with an openable and closable movable partition. When the movable partition is closed, it divides the central chamber into a first chamber and a second chamber that are not connected. The heat exchange tube assembly includes a first portion of heat exchange tubes passing through the first chamber and a second portion of heat exchange tubes passing through the second chamber. The first chamber is provided with an openable and closable exhaust inlet and exhaust outlet. The exhaust inlet is connected to the exhaust duct connecting to the clean room. The exhaust duct is also provided with an exhaust pipe having an air discharge valve. The fresh air handling unit includes a surface cooling section, an efficiency enhancement section, and a fan section arranged sequentially along the airflow direction. The fan section is provided with a reheater. The airflow from the efficiency enhancement section is introduced from the second chamber into the middle chamber of the energy-saving box and then led out from the middle chamber back out of the second chamber to the reheater.

[0006] Furthermore, in order to reduce energy loss, the energy-saving box is installed above the efficiency-enhancing section and the fan section of the fresh air handling unit. The first chamber and the second chamber are arranged vertically, and the second chamber is connected to the efficiency-enhancing section and the fan section.

[0007] Furthermore, one side of the bottom of the second chamber is connected to the efficiency enhancement section, and the other side of the bottom of the second chamber is connected to the fan section.

[0008] Furthermore, the energy-saving box also includes a front chamber and a rear chamber. The inlet of the heat exchange tube assembly is located in the front chamber, and the outlet of the heat exchange tube assembly is located in the rear chamber. The fresh air duct is connected to the front chamber and communicates with the heat exchange tube assembly located in the first chamber through a second air valve and with the heat exchange tube assembly located in the second chamber through a third air valve. The rear chamber is connected to the air inlet section of the fresh air handling unit.

[0009] Furthermore, the anterior chamber and the rear chamber are located on opposite sides of the central chamber.

[0010] Furthermore, the heat exchange tube assembly passes laterally through the middle chamber, and the exhaust inlet and exhaust outlet are located at both ends of the first chamber in the longitudinal direction, thereby improving heat exchange efficiency.

[0011] Furthermore, to facilitate control and switching of working states, the clean air conditioning fresh air processor includes a controller, and the first air valve, the second air valve, the third air valve, the exhaust inlet, the exhaust outlet and the air discharge valve are all electrically connected to the controller.

[0012] Furthermore, the fresh air duct is equipped with a temperature sensor and a humidity sensor, which are electrically connected to the controller.

[0013] Another technical solution of the present invention is as follows: A method for operating a cleanroom air conditioning fresh air processor with an energy-saving box, based on the aforementioned cleanroom air conditioning fresh air processor with an energy-saving box, includes a first operating mode, a second operating mode, and a third operating mode. First working mode: The first air valve is closed, the second air valve and the third air valve are open, the exhaust air inlet is closed, the exhaust air outlet is closed, the air discharge valve is open, the movable partition is open, the initial fresh air in the fresh air duct exchanges heat with the fresh air in the efficiency enhancement section and then enters the fresh air handling unit from the air inlet section, and the exhaust air of the clean room is discharged to the air through the discharge pipe; The second operating mode: When the initial fresh air dry bulb temperature is not lower than the first set temperature, the first air valve is closed, the second and third air valves are open, the exhaust inlet is open, the exhaust outlet is open, the air discharge valve is closed, and the movable partition is closed. The initial fresh air from the fresh air duct exchanges heat with the fresh air from the enhancement section and the exhaust air from the cleanroom before entering the fresh air handling unit from the air inlet section. The exhaust air from the cleanroom is discharged to the air through the exhaust outlet. When the initial fresh air dry bulb temperature is not higher than the second set temperature, the system switches to the first operating mode. The first set temperature is higher than the second set temperature. The third working mode: the first air valve opens proportionally, with the opening ratio being (fresh air volume - available exhaust air volume) / fresh air volume; the second air valve opens; the third air valve closes; the exhaust air inlet opens; the exhaust air outlet opens; the air discharge valve closes; the movable partition closes; part of the initial fresh air from the fresh air duct exchanges heat with the exhaust air from the cleanroom and then enters the fresh air handling unit from the air inlet section; the exhaust air from the cleanroom is discharged into the air through the exhaust air outlet.

[0014] Furthermore, a fourth operating mode is included: the first air valve is open, the second air valve and the third air valve are closed, the exhaust inlet is closed, the exhaust outlet is closed, the air discharge valve is open, the initial fresh air from the fresh air duct directly enters the fresh air handling unit, and the exhaust air from the cleanroom is discharged into the air through the discharge pipeline.

[0015] The advantages of this invention compared to the prior art are: This invention adds an energy-saving box to the existing fresh air handling unit structure. Through different operating modes, it performs fresh air-fresh air heat exchange and fresh air-exhaust air heat exchange to achieve purposes such as fresh air pre-cooling or preheating, exhaust air heat recovery, and fresh air reheating. Especially when the exhaust air is polluted or the temperature difference with the fresh air is small, and energy recovery is not possible, it achieves bidirectional energy saving through fresh air-fresh air heat exchange.

[0016] This invention controls the working mode of the energy-saving box by the state of the movable partition. When the temperature difference between the fresh air and the exhaust air reaches a threshold, the movable partition divides the central chamber into two chambers, and the corresponding heat exchange tube group is also divided into two parts to complete two heat exchange processes, maximizing the recovery of energy contained in the exhaust air. When the temperature difference between the fresh air and the exhaust air is small, the movable partition opens to make full use of the heat exchange tube group of the original exhaust air heat exchange section, maximizing the heat exchange area between fresh air and fresh air, and improving the heat exchange capacity.

[0017] In summary, this invention only slightly increases the electrical energy consumed by the fan during operation, achieving significant energy-saving effects and reducing operating costs. Attached Figure Description

[0018] Figure 1This is a schematic diagram of a clean air conditioning fresh air processor with an energy-saving box, as an example, constituting a clean system.

[0019] Figure 2 This is a schematic diagram of the energy-saving box in an embodiment.

[0020] Figure 3 This is a schematic diagram of the structure of the movable partition being closed according to an embodiment.

[0021] Figure 4 This is a schematic diagram of the structure when the movable partition is opened, as shown in the embodiment. Detailed Implementation

[0022] The present invention will be further described below with reference to embodiments, but these are not intended to limit the scope of the invention.

[0023] Please combine Figure 1 , Figure 2 As shown, the clean air conditioning fresh air processor with energy-saving box involved in this embodiment includes a fresh air duct, a fresh air handling unit, an energy-saving box, and an exhaust duct. The fresh air handling unit 1, along the airflow direction, is sequentially provided with an air inlet section 101, a primary filter section 102, a pretreatment section 103, a spray humidification section 104, a surface cooling section 105, an efficiency enhancement section 106, a first partition 107, a fan section 108, a mixing section 109, a chemical filtration section 110, a medium-efficiency filtration section 111, a high-efficiency filtration section 112, and an air supply section 113. A reheater 207 is located at the top of the fan section 108, and the fan draws air from the energy-saving box through the exhaust port below the reheater 207. The airflow enters the reheater 207 from the efficiency enhancement section 106 for heat exchange and is then transported backward by the fan section 108. Tubular heat exchangers are installed inside the pretreatment section 103, the surface cooling section 105, and the reheater 207, and spray pipes are installed inside the spray humidification section 104. The exhaust air from the air supply section 113 enters the cleanroom group 4 through the branch air valve group 3. The number of air valves in the branch air valve group 3 is equal to the number of cleanrooms in the cleanroom group 4. Each fresh air branch pipe connected to each cleanroom is equipped with an air valve. Each piece of equipment inside the cleanroom is individually equipped with an exhaust port and an exhaust pipe 52. Depending on the type of pollutants contained in the exhaust air, each exhaust pipe 52 is connected to a different scrubbing tower for treatment. The exhaust pipe 52 of this invention is connected to the exhaust ports of equipment in each cleanroom of the cleanroom group 4 that generates non-acidic, non-alkali, and non-organic emissions. The exhaust pipe 52 is connected to the exhaust inlet 210 of the energy-saving box 2 through a fourth air valve 522. In addition, the exhaust pipe 52 is also equipped with an exhaust pipe for air discharge, which is equipped with an air discharge valve 521. Therefore, the exhaust air from the exhaust pipe 52 can be either directed into the energy-saving box 2 or discharged directly into the air.

[0024] The fresh air duct 51 is used to introduce initial fresh air directly or through the energy-saving box 2 into the air inlet section 101 of the fresh air handling unit. A temperature sensor 611 and a humidity sensor 612 are installed on the fresh air duct 51. The fresh air duct 51 is connected to the air inlet section 101 of the fresh air handling unit via a first air valve 511. Additionally, the fresh air duct 51 is connected to the anteroom 201 of the energy-saving box 2. A second air valve 202 and a third air valve 203 are installed on the fresh air duct inside the anteroom 201 to control the flow direction of the initial fresh air entering the anteroom 201.

[0025] In this embodiment, the energy-saving box 2 is directly installed on the fresh air handling unit 1, specifically above the efficiency-enhancing section 106, the first partition 107, and the fan section 108. This direct installation shortens the path of fresh air from the fresh air handling unit, reducing energy loss during the process. To improve the heat exchange efficiency in the energy-saving box 2, it is equipped with a front chamber 201, a middle chamber, and a rear chamber 206, with the front chamber 201 and rear chamber 206 located on opposite sides of the middle chamber. A heat exchange tube assembly 205, communicating with the front chamber 201 and rear chamber 206, passes laterally through the middle chamber. The inlet of the heat exchange tube assembly 205 is located in the front chamber 201, and the outlet is located in the rear chamber 206, which is connected to the air inlet section 101 of the fresh air handling unit 1.

[0026] Please combine Figure 3 , Figure 4 As shown, the central chamber is equipped with a movable partition 209 that can be opened and closed. When the partition 209 is closed, it divides the central chamber into a first chamber 2041 and a second chamber 2042 that are not connected vertically. Simultaneously, the partition 209 also separates the front chamber 201, ensuring that the fresh air duct controlled by the second air valve 202 connects only to the heat exchange tube assembly 205 passing through the first chamber 2041, and that the fresh air duct controlled by the third air valve 203 connects only to the heat exchange tube assembly 205 passing through the second chamber 2042. In this embodiment, the partition 209 is a foldable telescopic plate. When the partition 209 is folded and retracted to its open state, the first chamber 2041 and the second chamber 2042 are connected as a single unit. When the partition 209 is unfolded, it is in a closed state, and the first chamber 2041 and the second chamber 2042 are separated and not connected. The first chamber 2041 is located above the second chamber 2042. The second chamber 2042 is connected to the efficiency enhancement section 106 and the fan section 107 of the fresh air handling unit 1. Specifically, the top of the efficiency enhancement section 106 and the fan section 107 of the fresh air handling unit 1 is open, and it is connected to the bottom opening of the second chamber 2042. One side of the bottom of the second chamber 2042 is connected to the efficiency enhancement section 106, and the other side of the bottom of the second chamber 2042 is connected to the fan section 107 through the reheater 207.

[0027] The first part of the heat exchange tubes in heat exchange tube assembly 205 passes through the first chamber 2041, and the second part of the heat exchange tubes in heat exchange tube assembly 205 passes through the second chamber 2042. The height of the movable partition 209 is set according to the ratio of the fresh air volume to the available exhaust air volume of the cleanroom. Available exhaust air refers to general exhaust air that does not contain pollutants such as acids, alkalis, and organic matter. Openable and closable exhaust inlets 210 and exhaust outlets 211 are respectively provided at both ends of the longitudinal direction of the first chamber 2041. The exhaust air from the exhaust duct 52 enters the first chamber 2041 through the exhaust inlet 210, exchanges heat with the initial fresh air in the first part of the heat exchange tubes in heat exchange tube assembly 205, and then exits from the exhaust outlet 211. The airflow in the enhancement section 106 enters the second chamber 2042, exchanges heat with the initial fresh air in the second part of the heat exchange tubes in heat exchange tube assembly 205, and then passes through the reheater 207 before entering the fan section 107. To further improve heat exchange efficiency, the inner walls of the first and second heat exchange tubes in the heat exchange tube assembly 205 can be fitted with straight fins of equal cross-section, and the outer walls can be fitted with annular fins.

[0028] In one embodiment, a controller 6 is also included. Temperature sensor 611, humidity sensor 612, first air valve 511, second air valve 202, third air valve 203, fourth air valve 522, and air exhaust valve 521 are all electrically connected to the controller 6. The opening and closing of exhaust inlet 210, exhaust outlet 211, and movable baffle 209 can also be controlled by the controller 6. The controller 6 is integrated into computer hardware and achieves automatic operation through a pre-set control program. The control program includes an environmental information management system and an energy consumption information management system. The environmental information management system uses a PLC controller to monitor the initial temperature and relative humidity of the fresh air, calculate the absolute humidity and enthalpy, and compare the monitored temperature or calculation results with the embedded set temperature 1 and set temperature 2. Based on the comparison results, the system controls the actions of each valve actuator. The energy consumption information management system collects the operating power of various energy-consuming components, such as the real-time power of fans, water pumps, chillers, heat pumps, cooling towers, etc.

[0029] The working principle of a clean air conditioning fresh air processor with an energy-saving box is as follows: (1) Summer is the first operating mode: the energy-saving box 2 is working, the movable partition 209 is folded open, the second air valve 202, the third air valve 203 and the air discharge valve 521 are open, the first air valve 511 and the fourth air valve 522 are closed, the exhaust air inlet 210 and the exhaust air outlet 211 are closed; the initial fresh air of the fresh air duct 51 exchanges heat with the fresh air of the efficiency enhancement section 106 and enters the fresh air handling unit 1 from the air inlet section 101, and the exhaust air of the clean room is discharged to the air through the exhaust pipe.

[0030] (2) Switching to the second operating mode in summer: When the dry bulb temperature of the fresh air is ≥ the first set temperature, the energy-saving box 2 works. At this time, the second partition 209 is opened, the second air valve 202, the third air valve 203 and the fourth air valve 522 are opened, the first air valve 511 and the air discharge valve 521 are closed, and the exhaust inlet 210 and the exhaust outlet 211 are opened until the dry bulb temperature of the fresh air is ≤ the second set temperature, and then switch to the first operating mode, where the first set temperature is greater than the second set temperature. The initial fresh air of the fresh air duct 51 exchanges heat with the fresh air of the efficiency enhancement section 106 and the exhaust air of the clean room and enters the fresh air handling unit 1 from the air inlet section 101. The exhaust air of the clean room is discharged to the air through the exhaust outlet 211.

[0031] (3) Winter is the third operating mode: the energy-saving box 2 is working, the second partition 209 is opened and closed, the first air valve is opened proportionally, the opening ratio is = (fresh air volume - available exhaust air volume) / fresh air volume, the second air valve 202 and the fourth air valve 522 are opened, the third air valve 203 and the air discharge valve 521 are closed, the exhaust air inlet 210 and the exhaust air outlet 211 are opened; part of the initial fresh air in the fresh air duct 51 exchanges heat with the exhaust air of the clean room and enters the fresh air handling unit 1 from the air inlet section 101, and the exhaust air of the clean room is discharged to the air through the exhaust air outlet 211.

[0032] (4) The transition season is the fourth operating mode: the energy-saving box 2 is not working. At this time, the first air valve 511 and the air exhaust valve 521 are open, the second air valve 202, the third air valve 203 and the fourth air valve 522 are closed, and the exhaust inlet 210 and the exhaust outlet 211 are closed. The initial fresh air from the fresh air duct 51 directly enters the fresh air handling unit 1, and the exhaust air from the clean room is discharged into the air through the exhaust pipe.

[0033] The time periods included in summer, winter and transition season are determined by the fresh air supply parameters required by the clean air conditioning, the enthalpy and humidity parameters of the air handling process, and the local annual meteorological parameters. The set temperature 1 and set temperature 2 in summer operation mode 2 are determined by the summer meteorological parameters, the clean room design temperature and the available exhaust volume.

[0034] Fresh air has the following three flow paths: (1) When the first air valve 511 is opened (opening ratio is 1) and the second air valve 202 and the third air valve 203 are closed, the fresh air passes through the first air valve 511 and enters the air inlet section 101, the primary filter section 102, the pretreatment section 103, the spray humidification section 104, the surface cooling section 105, the efficiency enhancement section 106, the energy saving box 2, the fan section 108, the air mixing section 109, the chemical filter section 110, the medium efficiency filter section 111, the high efficiency filter section 112, and the air supply section 113 in sequence, and enters the clean room group 4 through the branch air valve group 3.

[0035] (2) When the opening ratio of the first air valve 511 is less than 1, the second air valve 202 is opened, and the third air valve 203 is closed, a portion of the fresh air enters the front chamber 201, the heat exchange tube group 205, and the rear chamber 206 in sequence through the second air valve 202. Then, it mixes with other fresh air entering from the first air valve 511 through the air duct and enters the air inlet section 101, the primary filter section 102, the pretreatment section 103, the spray humidification section 104, the surface cooling section 105, the efficiency enhancement section 106, the energy saving box 2, the fan section 108, the air mixing section 109, the chemical filter section 110, the medium efficiency filter section 111, the high efficiency filter section 112, and the air supply section 113 in sequence. Finally, it enters the clean room group 4 through the branch air valve group 3.

[0036] (3) When the first air valve 511 is closed and the second air valve 202 and the third air valve 203 are open, fresh air enters the second air valve 202 and the third air valve 203 through the air duct respectively, and enters the front chamber 201, heat exchange pipe 205, rear chamber 206, air inlet section 101, primary filter section 102, pretreatment section 103, spray humidification section 104, surface cooling section 105, efficiency enhancement section 106, energy saving box 2, fan section 108, air mixing section 109, chemical filter section 110, medium efficiency filter section 111, high efficiency filter section 112, air supply section 113, and enters the clean room group 4 through the branch air valve group 3.

[0037] The airflow path is as follows: (1) When the air exhaust valve 521 is open and the fourth air valve 522 is closed, the exhaust air is discharged outdoors through the air exhaust valve 521; (2) When the air discharge valve 521 is closed and the fourth air valve 522 is opened, the exhaust air enters the exhaust inlet 210, the upper middle chamber 2041 and the exhaust outlet 211 in sequence through the fourth air valve 522 and is discharged to the outside through the air duct.

[0038] In summary, by using the clean air conditioning fresh air processor with energy-saving box disclosed in this invention, the opening and closing states of different air valves are controlled according to seasonal changes and the detection of the initial temperature and humidity of the fresh air, so as to maximize the utilization of the energy of the initial state of the fresh air and the energy contained in the exhaust air, thereby reducing the energy consumption of the fresh air pretreatment and reheating process.

[0039] Taking the cleanroom air conditioning fresh air processor with energy-saving box and its working method of this invention used in a semiconductor cleanroom in Shanghai as an example, the fresh air volume is 30,000 m³. 3 / h, with an exhaust volume of 10000 m³ / h, excluding acid, alkali, and organic pollutants. 3 / h, the design temperature and relative humidity of the clean indoor air are 23℃ and 45%, respectively, and the dry bulb temperature and dew point temperature of the supply air are 19℃ and 11.2℃, respectively. Analysis of outdoor meteorological parameters in Shanghai in 2023 shows that the summer operation mode covers 2367 hours from 11:00 on June 8th to 2:00 on September 15th; the winter operation mode covers 2268 hours from 0:00 on January 1st to 1:00 on February 28th and from 22:00 on November 25th to 23:00 on December 31st; and the transition season operation mode covers 4125 hours from 2:00 on February 28th to 10:00 on June 8th and from 3:00 on September 15th to 21:00 on November 25th.

[0040] In this embodiment, the movable partition 209 is positioned such that the height ratio of the first chamber 2041 to the second chamber 2042 is 1:3. The first set temperature is 30.7℃, and the second set temperature is 24.2℃. The operating energy consumption of the clean air conditioning fresh air processor with an energy-saving box disclosed in this invention is theoretically calculated and compared with the operating energy consumption of a conventional fresh air handling unit without an energy-saving box. The results show that the average annual operating energy consumption of a conventional fresh air handling unit without an energy-saving box is 350kW, while the average annual operating energy consumption of the clean air conditioning fresh air processor with an energy-saving box disclosed in this invention is 246kW, saving 104kW of energy compared to the conventional fresh air processor, for a total annual energy saving of 3.28 x 10⁻⁶. 9 kJ.

Claims

1. A clean air conditioning fresh air processor with an energy-saving box, characterized in that, The system includes a fresh air duct, a fresh air handling unit, an energy-saving box, and an exhaust duct. The fresh air duct is connected to the air inlet section of the fresh air handling unit via a first air valve. The fresh air duct guides initial fresh air to the inlet of the heat exchange tube assembly in the energy-saving box via a second air valve. The energy-saving box includes a central chamber containing the heat exchange tube assembly. The outlet of the heat exchange tube assembly is connected to the air inlet section of the fresh air handling unit. The central chamber has an openable and closable partition. When closed, the partition divides the central chamber into a first chamber and a second chamber that are not connected. The heat exchange tube assembly includes components passing through the first... The first part of the chamber has heat exchange tubes and a second part of heat exchange tubes passing through the second chamber. The first chamber is provided with an openable and closable exhaust inlet and exhaust outlet. The exhaust inlet is connected to the exhaust duct connecting to the clean room. The exhaust duct is also provided with an exhaust pipe with an air discharge valve. The fresh air handling unit includes a surface cooling section, an efficiency enhancement section and a fan section arranged sequentially along the airflow direction. The fan section is provided with a reheater. The airflow of the efficiency enhancement section is introduced from the second chamber into the middle chamber of the energy-saving box and then led out from the middle chamber and the second chamber to the reheater.

2. The clean air conditioning fresh air processor with energy-saving box according to claim 1, characterized in that, The energy-saving box is located above the efficiency-enhancing section and the fan section of the fresh air handling unit. The first chamber and the second chamber are arranged vertically, and the second chamber is connected to the efficiency-enhancing section and the fan section.

3. The clean air conditioning fresh air processor with energy-saving box according to claim 2, characterized in that, One side of the bottom of the second chamber is connected to the efficiency enhancement section, and the other side of the bottom of the second chamber is connected to the fan section.

4. The clean air conditioning fresh air processor with energy-saving box according to claim 1, characterized in that, The energy-saving box also includes a front chamber and a rear chamber. The inlet of the heat exchange tube group is located in the front chamber, and the outlet of the heat exchange tube group is located in the rear chamber. The fresh air duct is connected to the front chamber and communicates with the heat exchange tube group located in the first chamber through a second air valve and with the heat exchange tube group located in the second chamber through a third air valve. The rear chamber is connected to the air inlet section of the fresh air handling unit.

5. The clean air conditioning fresh air processor with energy-saving box according to claim 4, characterized in that, The anterior chamber and the rear chamber are located on opposite sides of the central chamber.

6. The clean air conditioning fresh air processor with energy-saving box according to claim 1, characterized in that, The heat exchange tube assembly passes laterally through the middle chamber, and the exhaust inlet and exhaust outlet are located at both ends of the first chamber in the longitudinal direction.

7. The clean air conditioning fresh air processor with energy-saving box according to claim 4, characterized in that, The clean air conditioning fresh air processor includes a controller, and the first air valve, the second air valve, the third air valve, the exhaust inlet, the exhaust outlet and the air discharge valve are all electrically connected to the controller.

8. The clean air conditioning fresh air processor with energy-saving box according to claim 7, characterized in that, The fresh air duct is equipped with a temperature sensor and a humidity sensor, which are electrically connected to the controller.

9. A method for operating a clean air conditioning fresh air processor with an energy-saving box, characterized in that, Based on the clean air conditioning fresh air processor with energy-saving box as described in any one of claims 1 to 8, the system includes a first working mode, a second working mode, and a third working mode. First working mode: The first air valve is closed, the second air valve and the third air valve are open, the exhaust air inlet is closed, the exhaust air outlet is closed, the air discharge valve is open, the movable partition is open, the initial fresh air in the fresh air duct exchanges heat with the fresh air in the efficiency enhancement section and then enters the fresh air handling unit from the air inlet section, and the exhaust air of the clean room is discharged to the air through the discharge pipe; The second working mode: When the initial fresh air dry bulb temperature is not less than the first set temperature, the first air valve is closed, the second air valve and the third air valve are opened, the exhaust air inlet is opened, the exhaust air outlet is opened, the air discharge valve is closed, the movable partition is closed, the initial fresh air in the fresh air duct exchanges heat with the fresh air in the efficiency enhancement section and the exhaust air in the clean room and then enters the fresh air handling unit from the air inlet section, and the exhaust air in the clean room is discharged to the air through the exhaust air outlet; When the initial fresh air dry bulb temperature is not greater than the second set temperature, switch to the first working mode; when the first set temperature is greater than the second set temperature; The third working mode: the first air valve opens proportionally, with the opening ratio being (fresh air volume - available exhaust air volume) / fresh air volume; the second air valve opens; the third air valve closes; the exhaust air inlet opens; the exhaust air outlet opens; the air discharge valve closes; the movable partition closes; part of the initial fresh air from the fresh air duct exchanges heat with the exhaust air from the cleanroom and then enters the fresh air handling unit from the air inlet section; the exhaust air from the cleanroom is discharged into the air through the exhaust air outlet.

10. The method of operating the clean air conditioning fresh air processor with energy-saving box according to claim 9, characterized in that, The fourth operating mode includes: the first air valve is open, the second and third air valves are closed, the exhaust inlet is closed, the exhaust outlet is closed, the air discharge valve is open, the initial fresh air from the fresh air duct directly enters the fresh air handling unit, and the exhaust air from the cleanroom is discharged into the air through the discharge duct.

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