A smart dehumidification and total heat recovery ventilation unit and its control method

Abstract

This invention discloses an intelligent dehumidification and total heat recovery ventilation unit and its control method. The ventilation unit includes: a wind chamber, a polymer dehumidification screen, a variable-speed fan, a plate-fin heat exchanger, and a semiconductor refrigeration chip. Two outdoor air inlets and outlets are provided at the outdoor end of the wind chamber, and the polymer dehumidification screens are installed at these two outdoor air inlets and outlets for dehumidifying outdoor fresh air. Two indoor air inlets and outlets are provided at the indoor end of the wind chamber, and variable-speed fans are installed at each of these two indoor air inlets and outlets to control the airflow direction and speed. The method includes: when the carbon dioxide concentration monitored by any of the air quality sensors exceeds a first threshold and / or the number of people monitored by the infrared sensor exceeds a second threshold, controlling one of the variable-speed fans to operate in the forward direction and the other variable-speed fan to operate in the reverse direction for exhaust; and activating the corresponding semiconductor refrigeration chip. This achieves total heat recovery ventilation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of total heat recovery ventilation, and particularly relates to an intelligent dehumidification total heat recovery ventilation unit and a control method thereof. BACKGROUND

[0002] The ventilation unit is generally used for a new air ventilation system of a large space office area, a large conference room area and a reception area, and can be independently used for ventilation or used in cooperation with a central air conditioner. The ventilation unit sends new air to the indoor through a new air fan and discharges indoor air to realize ventilation between the indoor and the outdoor.

[0003] However, the existing ventilation unit has the following problems.

[0004] Firstly, the existing ventilation unit cannot pre-cool the new air, and only exchanges heat with the indoor discharged air conditioner cold air, so that the air state (temperature and humidity) of the outdoor new air cannot be effectively reduced, only the temperature of the new air can be slightly reduced, the problem of high humidity of the new air cannot be solved, the equipment functionality is insufficient, the new air treatment capacity is insufficient, and the indoor air state still fluctuates greatly, so that the transition delivery cannot be effectively and stably performed.

[0005] Secondly, the outdoor air quality (carbon dioxide concentration) is generally 500-600 ppm, and the indoor new air supply requirement is generally higher than 1000 ppm (carbon dioxide concentration), and it is recommended to open the new air for supplement, and the new air delivery is too much and the ventilation frequency is too high during the air supply and discharge process, which reduces the indoor environmental comfort and discharges a large amount of air conditioner cold air, so that the terminal air conditioner load is high.

[0006] Thirdly, the existing indoor air quality regulation has a certain hysteresis, and the new air supplement is performed only when the monitored indoor air quality is out of standard, especially when the air quality sensing device has insufficient sensitivity or the installation collection point is far away from the human activity area, the parameter collected by the air quality sensing device is often distorted, the new air control is unstable, and the indoor air quality is poor, the new air experience is insufficient, and the environmental body feeling is not suitable. SUMMARY

[0007] Therefore, the present application aims to provide an intelligent dehumidification total heat recovery ventilation unit and a control method thereof, which can solve the above problems.

[0008] The present application provides an intelligent dehumidification total heat recovery ventilation unit, which comprises:

[0009] a wind bin, a high-molecular dehumidification screen, a speed-regulating fan, a plate-fin heat exchanger and a semiconductor refrigeration sheet.

[0010] The two outdoor air inlets and outlets are provided with the polymer dehumidification screen for dehumidification of outdoor fresh air.

[0011] The plate-fin heat exchanger is vertically arranged in the air warehouse, and the plate-fin heat exchanger comprises a plurality of layers of flow guide fins, and adjacent flow guide fins have different backflow directions.

[0012] Further, the speed-regulating fan rotates forward to form an air supply channel for conveying outdoor fresh air, and the speed-regulating fan rotates reversely to form an air exhaust channel for exhausting indoor air.

[0013] One of the speed-regulating fans rotates forward, outdoor fresh air enters the air warehouse through the diagonal outdoor air inlets and outlets and the polymer dehumidification screen, and the outdoor fresh air flows through the plate-fin heat exchanger and is then output from the indoor air inlets and outlets in the same path as the speed-regulating fan rotating forward.

[0014] The other speed-regulating fan rotates reversely, indoor air enters the air warehouse through the indoor air inlets and outlets in the same path as the speed-regulating fan rotating reversely, and the indoor air flows through the plate-fin heat exchanger and is then output from the diagonal outdoor air inlets and outlets.

[0015] Further, one side of the semiconductor refrigeration sheet is a refrigeration side, and the other side is a heat dissipation side.

[0016] The semiconductor refrigeration sheet comprises a first semiconductor refrigeration sheet, a second semiconductor refrigeration sheet, a third semiconductor refrigeration sheet and a fourth semiconductor refrigeration sheet.

[0017] The first semiconductor refrigeration sheet and the second semiconductor refrigeration sheet are sequentially connected to the outdoor air inlets and outlets of the air warehouse, and the refrigeration sides of the first semiconductor refrigeration sheet and the second semiconductor refrigeration sheet face different directions.

[0018] The third semiconductor refrigeration sheet and the fourth semiconductor refrigeration sheet are connected to the wall of the air warehouse, and the refrigeration sides of the third semiconductor refrigeration sheet and the fourth semiconductor refrigeration sheet face the outdoor air inlets and outlets of the air warehouse.

[0019] Further, the speed-regulating fan is electrically connected with a control module, the control module is arranged outside the air warehouse, and is used for controlling the rotating direction and rotating speed of the speed-regulating fan; the control module is electrically connected with the semiconductor refrigerating sheet, and is used for controlling the starting and stopping of the semiconductor refrigerating sheet.

[0020] Further, the control module is connected with air quality sensors, the air quality sensors are arranged at the indoor air inlet and air outlet respectively, and are used for monitoring the carbon dioxide concentration in the room; the control module is connected with infrared sensors, and the infrared sensors are installed in the room, and are used for monitoring the number of people in the room.

[0021] Further, the control module is connected with two humidity sensors, and the humidity sensors are arranged at two ends of the polymer dehumidification sieve respectively, and are used for detecting the humidity of the polymer dehumidification sieve.

[0022] The application provides a control method of an intelligent dehumidification and total heat recovery air handling unit.

[0023] When the carbon dioxide concentration monitored by any one of the air quality sensors is higher than a first threshold value and / or the number of people monitored by the infrared sensor is higher than a second threshold value, one of the speed-regulating fans is controlled to operate in a forward air supply mode, and the other speed-regulating fan is controlled to operate in a reverse air exhaust mode.

[0024] The corresponding semiconductor refrigerating sheet is started.

[0025] Further, the control method comprises the following steps:

[0026] When the humidity monitored by one of the humidity sensors is higher than a third threshold value, the speed-regulating fan in the channel where the humidity sensor is arranged is controlled to operate in a reverse air exhaust mode, and the other speed-regulating fan is controlled to operate in a forward air supply mode.

[0027] If the humidity monitored by both of the humidity sensors is higher than the third threshold value, the humidity monitored by the two humidity sensors is compared, the speed-regulating fan in the channel where the humidity sensor with higher humidity is arranged is controlled to operate in a reverse air exhaust mode, and the other speed-regulating fan is controlled to operate in a forward air supply mode.

[0028] Further, the starting of the corresponding semiconductor refrigerating sheet comprises the following steps:

[0029] The third semiconductor refrigerating sheet and the fourth semiconductor refrigerating sheet are started.

[0030] The semiconductor refrigerating sheet with a refrigerating surface facing the air supply channel is started among the first semiconductor refrigerating sheet and the second semiconductor refrigerating sheet.

[0031] The beneficial effects of the present application are:

[0032] First, the plate-fin heat exchanger is arranged in the central part of the air warehouse, two direction flow guides are arranged, the outdoor wet air is dehumidified and exchanged with the indoor discharged cold air, and then is transported to the indoor, so that the fresh air load of the central air conditioning system is greatly reduced, and the operation energy consumption of the central air conditioning system is reduced; the corresponding refrigeration surface of the semiconductor refrigerating fin is arranged on the fresh air transportation air path, the outdoor fresh air is partially refrigerated by the semiconductor refrigerating fin, the temperature of the fresh air transported to the indoor is reduced in advance, the heat energy exchange is reduced, the fresh air temperature approaches the indoor temperature, the impact of the indoor fresh air on the indoor air conditioning environment is avoided, and the environmental comfort is improved.

[0033] Second, during the air exhaust, the plate-fin heat exchanger is used to heat exchange, the indoor air is heated, the corresponding heat dissipation surface of the semiconductor refrigerating fin is arranged on the air exhaust path, the indoor air is partially heated by the semiconductor refrigerating fin, when the air is transported to the outdoor air inlet and outlet, the high molecular dehumidification screen can be heated and dried by the hot air, without additional heating function, and through the heat exchange of the indoor and outdoor air, the energy saving and environmental protection are realized.

[0034] Third, the air quality sensor and the infrared sensor are used to monitor the indoor air and the number of people, the air exchange is automatically started, the instability in the new air volume adjustment process is reduced, and the oversupply is avoided; the sudden increase of the new air volume in the new air adjustment process is avoided, the indoor environment temperature is greatly fluctuated, the human comfort experience in the indoor new air adjustment is increased. The air quality sensor is arranged at the indoor air inlet and outlet, the air quality in the air warehouse is monitored, the air quality is monitored in real time, the air exchange is automatically started in time, and the new air is supplemented in time. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Figure 1 It is an external structure diagram of the air exchange unit in the present application.

[0037] Figure 2 It is an internal structure diagram of the air exchange unit in the present application.

[0038] Figure 3 It is a gas path schematic diagram of the speed regulating motor of the air exchange unit in the present application. DETAILED DESCRIPTION

[0039] For the convenience of those skilled in the art to understand, the structure of the present application will be further described in detail in combination with the drawings in the embodiments, and it should be understood that, in the embodiments, the steps mentioned can be adjusted in actual need in terms of the order, even can be executed simultaneously or partially simultaneously, except that the order is particularly specified.

[0040] As shown in Figure 1 and Figure 2 The present application provides an intelligent dehumidification total heat recovery ventilation unit, comprising: a wind bin 1, a high polymer dehumidification sieve 2, a speed-regulating fan 3, a plate-fin heat exchanger 4, and a semiconductor refrigeration sheet 5.

[0041] Two outdoor air inlets and outlets 11 are arranged at one end of the wind bin 1 facing the outdoor, and the high polymer dehumidification sieve 2 is arranged at the two outdoor air inlets and outlets 11 for dehumidification of outdoor fresh air; two indoor air inlets and outlets 12 are arranged at one end of the wind bin facing the indoor, and the speed-regulating fan 3 is arranged at the two indoor air inlets and outlets respectively for controlling the direction and speed of air flow.

[0042] The plate-fin heat exchanger 4 is vertically arranged in the middle of the wind bin 1, and the plate-fin heat exchanger 4 is inclined towards the air inlets and outlets of the wind bin 1 at four sides respectively to form a bidirectional channel for energy exchange of outdoor air and indoor air; the plate-fin heat exchanger 4 is in a square structure, and three corners of the plate-fin heat exchanger 4 not facing the indoor air inlet are connected with the wind bin 1 through the semiconductor refrigeration sheet 5 to form a completely isolated bidirectional channel. The plate-fin heat exchanger 4 comprises multiple layers of flow guide sheets, and adjacent flow guide sheets have different backflow directions.

[0043] In the embodiments, the wind bin is a cuboid with a certain space, and the plate-fin heat exchanger and the like need to be installed inside, and a stainless steel or plastic-sprayed carbon steel shell is arranged outside the wind bin for dust prevention and anti-collision. The outdoor air inlets and outlets and the indoor air inlets and outlets can be circular or square. The built-in high polymer dehumidification sieve is used to absorb moisture in the humid air to reduce the moisture content of the fresh air delivered to the indoor. The plate-fin heat exchanger is made of aluminum foil, ABS, paper, epoxy resin and the like. Among them, the aluminum foil is preferably used, and the total heat recovery efficiency is greater than or equal to 80%.

[0044] The following table is a comparison of the heat recovery efficiency of the heat recovery ventilation unit of the present application with other materials.

[0045]

[0046] Further, the speed-regulating fan 3 rotates forward to form an air supply channel for conveying outdoor fresh air; the speed-regulating fan 3 rotates reversely to form an air exhaust channel for exhausting indoor air; one of the speed-regulating fans 3 rotates forward, and outdoor fresh air enters the air warehouse 1 through the diagonal outdoor air inlet and outlet 11 and the polymer dehumidification screen 2, and then flows through the plate-fin heat exchanger 4 and is output from the indoor air inlet and outlet 12 in the same path as the speed-regulating fan 3; the other speed-regulating fan 3 rotates reversely, and indoor air enters the air warehouse through the indoor air inlet and outlet 12 in the same path as the speed-regulating fan 3, and then flows through the plate-fin heat exchanger 4 and is output from the diagonal outdoor air inlet and outlet.

[0047] In the embodiment, two speed-regulating fans are arranged in the air warehouse, and when the two speed-regulating fans work in the same direction, the conveying efficiency of fresh air or exhaust air can be increased; as shown in Figure 3 When the two speed-regulating fans work reversely, two air paths are formed by the guide vanes in the plate-fin heat exchanger, one for conveying fresh air and the other for exhausting air, so that fresh air is conveyed and air is exhausted at the same time, and rapid air exchange is realized.

[0048] Further, one side of the semiconductor refrigeration sheet 5 is a refrigeration side, and the other side is a heat dissipation side;

[0049] As shown in Figure 3 The semiconductor refrigeration sheet 5 includes a first semiconductor refrigeration sheet 51, a second semiconductor refrigeration sheet 52, a third semiconductor refrigeration sheet 53, and a fourth semiconductor refrigeration sheet 54; the plate-fin heat exchanger 4 and the outdoor air inlet and outlet of the air warehouse 1 are sequentially connected with the first semiconductor refrigeration sheet 51 and the second semiconductor refrigeration sheet 52, and the refrigeration sides of the first semiconductor refrigeration sheet 51 and the second semiconductor refrigeration sheet 52 face different directions; the plate-fin heat exchanger 4 and the air warehouse wall of the air warehouse 1 are respectively connected with the third semiconductor refrigeration sheet 53 and the fourth semiconductor refrigeration sheet 54, and the refrigeration sides of the third semiconductor refrigeration sheet 53 and the fourth semiconductor refrigeration sheet 54 face the outdoor air inlet and outlet of the air warehouse 1.

[0050] In this embodiment, the thermoelectric cooler is a thin semiconductor wafer with one side for heat dissipation and the other for cooling. Four thermoelectric coolers can be used to block air and form different air paths. The third and fourth thermoelectric coolers facing the outdoor air inlet and outlet are set as cooling surfaces to pre-cool the air before it enters the plate-fin heat exchanger. The surfaces facing the indoor air inlet and outlet are set as heat dissipation surfaces to pre-heat the air before it enters the plate-fin heat exchanger. Effective use of thermoelectric coolers for cooling and heat dissipation can effectively save energy. Setting the cooling surfaces of the first and second thermoelectric coolers to face different directions can be used to activate the thermoelectric cooler with its cooling surface facing the air supply channel when the two speed-regulating fans are running in different directions, prioritizing cooling during indoor air supply.

[0051] The table below compares the indoor and outdoor air enthalpy difference of the present invention with that of a ventilation unit without a semiconductor cooling chip, as well as the relative energy saving rate of the present invention.

[0052]

[0053] Furthermore, the speed-regulating fan 3 is electrically connected to a control module 6, such as... Figure 1 As shown, the control module is located on the outside of the air chamber 1 and is used to control the rotation direction and speed of the variable speed fan 3. The control module 6 is electrically connected to the thermoelectric cooler 5 and is used to control the start and stop of the thermoelectric cooler 5. The control module 6 is connected to an air quality sensor 7, which is located at the indoor air inlet and outlet to monitor the indoor carbon dioxide concentration. The control module 6 is also connected to an infrared sensor, which is installed indoors to monitor the number of people in the room. The control module 6 is connected to two humidity sensors (not shown in the figure), which are located at both ends of the polymer dehumidifying screen 2 to detect the humidity of the polymer dehumidifying screen.

[0054] In this embodiment, the control module can be located outside the ventilation unit. The control module communicates with the speed-regulating fan via RS-485. The control module of each ventilation unit can communicate with the host computer via RS-485. If the host computer can communicate with several control modules, a switch can be added between the host computer and several control modules to improve communication efficiency. The control module acquires data from the air quality sensor, infrared sensor, and humidity sensor to control the speed and direction of the speed-regulating fan, thereby achieving ventilation regulation.

[0055] This invention provides a control method for an intelligent dehumidification and total heat recovery ventilation unit, comprising:

[0056] S1 When the carbon dioxide concentration monitored by any of the air quality sensors is higher than the first threshold and / or the number of people monitored by the infrared sensor is higher than the second threshold, control one of the speed-regulating fans to run in the forward air supply mode and the other speed-regulating fan to run in the reverse air exhaust mode.

[0057] S101 When the humidity detected by one of the humidity sensors is higher than the third threshold, the speed-regulating fan in the channel where it is located is controlled to run in reverse exhaust mode, while the other speed-regulating fan runs in forward exhaust mode.

[0058] S102 If the humidity detected by both humidity sensors is higher than the third threshold, compare the humidity detected by the two humidity sensors, and control the speed-regulating fan of the channel where the humidity sensor with higher humidity is located to run in reverse exhaust mode, while the other speed-regulating fan runs in forward exhaust mode.

[0059] In this step, the indoor carbon dioxide concentration needs to be replenished to a critical value (national standard value of 1000 ppm). Therefore, the first threshold can be set to 900-1000 ppm, where 100 ppm is the detection error value. The second threshold is set according to the number of people that can be accommodated in the room. The upper limit of the number of people is calculated based on the indoor area, with an average floor area of ​​2-4 square meters per person. When the indoor carbon dioxide concentration is too high or there are too many people in the room, indoor ventilation is required. If the humidity detected by the humidity sensor does not exceed the third threshold (the third threshold can be set to 90% humidity saturation of the polymer dehumidifier), select any one variable speed fan to supply air and the other variable speed fan to exhaust air to achieve indoor and outdoor gas exchange.

[0060] If the humidity level in one section exceeds the third threshold, it means that the polymer dehumidifier screen in that section needs to be dried as soon as possible; otherwise, it will not be able to dehumidify in time. Therefore, the variable-speed fan in that section is controlled to reverse the exhaust air to achieve drying, while the other variable-speed fan runs in the forward direction, without affecting the ventilation function of the entire ventilation unit. The adjustment frequency of the variable-speed fan can be adjusted according to the indoor carbon dioxide concentration and the number of people.

[0061] S2 activates the corresponding semiconductor cooling chip.

[0062] S201 activates the third and fourth semiconductor refrigeration chips;

[0063] S202 activates the first and second semiconductor refrigeration chips, whose cooling surfaces face the air supply channel.

[0064] In this step, the thermoelectric coolers are activated simultaneously with the variable-speed fan. Since the cooling surfaces of both the third and fourth thermoelectric coolers face the outdoor air inlet and outlet, cooling during air intake and heating during exhaust are guaranteed regardless of the direction the variable-speed fan rotates. Therefore, activating both the third and fourth thermoelectric coolers simultaneously is sufficient. However, because the cooling surfaces of the first and second thermoelectric coolers face different channels, the corresponding thermoelectric cooler must be activated based on the direction of the variable-speed fan rotation, prioritizing cooling during indoor air supply.

[0065] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0066] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0067] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0068] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1The steps of the function specified in one or more boxes.

[0069] It should be noted that any reference signs placed between parentheses in the claims should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0070] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0071] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0072] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A control method of an intelligent dehumidifying total heat recovery ventilation air handling unit, characterized in that, Based on an intelligent dehumidification total heat recovery ventilation unit, comprising: a wind warehouse, a high polymer dehumidification screen, a speed-regulating fan, a plate-fin heat exchanger, and a semiconductor refrigeration sheet; Two outdoor air inlets and outlets are arranged at one end of the wind warehouse facing the outdoor, and the high polymer dehumidification screen is arranged at the two outdoor air inlets and outlets for dehumidification of outdoor fresh air; two indoor air inlets and outlets are arranged at one end of the wind warehouse facing the indoor, and the speed-regulating fan is arranged at the two indoor air inlets and outlets respectively for controlling the air flow direction and speed; The plate-fin heat exchanger is vertically arranged in the middle of the wind warehouse, the plate-fin heat exchanger comprises multiple layers of flow guide fins, the flow directions of adjacent flow guide fins are different; the plate-fin heat exchanger is inclined towards the air inlets and outlets of the wind warehouse at four sides respectively to form a bidirectional channel for energy exchange between outdoor air and indoor air; the plate-fin heat exchanger is in a square structure, and the three corners of the plate-fin heat exchanger not facing the indoor air inlets are connected with the wind warehouse through the semiconductor refrigeration sheets to form a completely isolated bidirectional channel; One side of the semiconductor refrigeration sheet is a refrigeration side, and the other side is a heat dissipation side; The semiconductor refrigeration sheet comprises: a first semiconductor refrigeration sheet, a second semiconductor refrigeration sheet, a third semiconductor refrigeration sheet, and a fourth semiconductor refrigeration sheet; The first semiconductor refrigeration sheet and the second semiconductor refrigeration sheet are sequentially connected with the plate-fin heat exchanger at the outdoor air inlets and outlets of the wind warehouse, and the refrigeration sides of the first semiconductor refrigeration sheet and the second semiconductor refrigeration sheet face different directions; The third semiconductor refrigeration sheet and the fourth semiconductor refrigeration sheet are connected with the plate-fin heat exchanger at the wall of the wind warehouse respectively, and the refrigeration sides of the third semiconductor refrigeration sheet and the fourth semiconductor refrigeration sheet face the outdoor air inlets and outlets of the wind warehouse; The control module is connected with two humidity sensors, the humidity sensors are arranged at two ends of the high polymer dehumidification screen respectively for detecting the humidity of the high polymer dehumidification screen; The speed-regulating fan rotates forward to form an air supply channel for conveying outdoor fresh air; The method comprises: When the carbon dioxide concentration monitored by any air quality sensor is higher than a first threshold value and / or the number of people monitored by an infrared sensor is higher than a second threshold value, one of the speed-regulating fans is controlled to run in the forward air supply mode, and the other speed-regulating fan is controlled to run in the reverse air exhaust mode, in particular: When the humidity monitored by one of the humidity sensors is higher than a third threshold value, the speed-regulating fan of the channel where the humidity sensor is located is controlled to run in the reverse air exhaust mode, and the other speed-regulating fan is controlled to run in the forward air supply mode; If the humidity monitored by both of the humidity sensors is higher than the third threshold value, the humidity monitored by both of the humidity sensors is compared, the speed-regulating fan of the channel where the humidity sensor with higher humidity is located is controlled to run in the reverse air exhaust mode, and the other speed-regulating fan is controlled to run in the forward air supply mode; The corresponding semiconductor refrigeration sheet is started, in particular The third semiconductor refrigeration sheet and the fourth semiconductor refrigeration sheet are started; The semiconductor refrigeration sheet with the refrigeration side facing the air supply channel is started among the first semiconductor refrigeration sheet and the second semiconductor refrigeration sheet.

2. The control method of the intelligent dehumidifying total heat recovery ventilation air handling unit according to claim 1, characterized in that, The speed-regulating fan rotates reversely to form an air exhaust channel for exhausting indoor air. One of the said speed-regulating fan rotates forward, outdoor fresh air enters the air warehouse through the diagonal said outdoor air inlet and outlet, and the polymer dehumidification screen, outdoor fresh air flows through the said plate-fin heat exchanger and then is output from the said indoor air inlet and outlet of the same route of the forward rotating said speed-regulating fan; The other said speed-regulating fan rotates reversely, indoor air enters the air warehouse through the said indoor air inlet and outlet of the same route of the reversely rotating said speed-regulating fan, indoor air flows through the said plate-fin heat exchanger and then is output from the diagonal said outdoor air inlet and outlet.

3. The control method of the intelligent dehumidifying total heat recovery ventilation air handling unit according to claim 1, wherein, The said speed-regulating fan is electrically connected with a control module, the said control module is arranged outside the said air warehouse, and is used for controlling the rotating direction and rotating speed of the said speed-regulating fan.

4. The control method of the intelligent dehumidifying total heat recovery ventilation air handling unit according to claim 3, characterized in that, The said control module is electrically connected with the said semiconductor refrigeration sheet, and is used for controlling the start and stop of the said semiconductor refrigeration sheet.

5. The control method of the intelligent dehumidifying total heat recovery ventilation air handling unit according to claim 3, characterized in that, The said control module is connected with an air quality sensor, the said air quality sensor is arranged at the said indoor air inlet and outlet respectively, and is used for monitoring indoor carbon dioxide concentration; the said control module is connected with an infrared sensor, the said infrared sensor is installed indoors, and is used for monitoring indoor number of people.

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