Air treatment system and control method thereof

Abstract

The invention discloses an air treatment system and a control method, and belongs to the technical field of air treatment. The air treatment system comprises a fresh air humidifying machine. The fresh air humidifying machine comprises a fresh air duct; the adsorption assembly is arranged in the fresh air duct, and the adsorption assembly absorbs moisture of fresh air in the fresh air duct when the fresh air humidifying machine is in dehumidification operation; the fresh air feeder is used for driving fresh air in the fresh air duct to flow indoors; the fresh air humidity detection device is used for detecting the moisture content of supplied fresh air; and the return air humidity detection device is used for detecting the moisture content of indoor air. The control method comprises the steps that the target air supply moisture content is calculated according to the indoor air moisture content and the indoor set moisture content; and whether the relation between the fresh air supply moisture content and the target air supply moisture content meets a first preset permission condition or not is judged, if not, the speed of the fresh air supply machine is controlled to be reduced, and if yes, the current state is kept. According to the air treatment system and the control method, rapid energy-saving dehumidification can be achieved.

Description

Technical Field

[0001] The present application relates to the technical field of air treatment, and in particular to an air treatment system and a control method thereof. Background Art

[0002] An air conditioner is a device used to adjust the temperature and humidity of indoor air. It discharges the cooled air obtained through a refrigeration cycle into the indoor space. The refrigeration cycle usually consists of compression, condensation, expansion and evaporation of the refrigerant, or it discharges the heated air obtained by reversing the above process into the indoor space, thereby regulating the indoor air. A fresh air humidifier is a device that introduces humidified fresh air into the room. A fresh air humidifier regulates the indoor air by sending fresh air with appropriate humidity into the room.

[0003] As people's requirements for indoor environment increase, there are more and more scenarios where air conditioners and fresh air humidifiers are used at the same time. Since both devices have dehumidification functions, how to dehumidify quickly and energy-savingly has become a technical problem that needs to be solved urgently in this field. Summary of the invention

[0004] The present application provides an air treatment system and a control method, which can achieve rapid energy-saving dehumidification.

[0005] In one aspect of the present application, an air treatment system includes: a fresh air humidifier; the fresh air humidifier includes: a fresh air duct; an adsorption component, which is arranged in the fresh air duct, and when the fresh air humidifier is in dehumidification operation, the adsorption component absorbs moisture from the fresh air in the fresh air duct; a fresh air blower, which is used to drive the fresh air in the fresh air duct to flow into the room;

[0006] The air handling system also includes:

[0007] A fresh air humidity detection device is used to detect the humidity content of the fresh air supply; a return air humidity detection device is used to detect the humidity content of the indoor air; a controller is used to: in the fresh air dehumidification mode, calculate the target supply air humidity content according to the detection value of the return air humidity detection device and the set indoor humidity content; when the relationship between the detection value of the fresh air humidity detection device and the target supply air humidity content does not meet the first preset permissible condition, control the fresh air supply fan to slow down.

[0008] In some embodiments, the target supply air humidity content Dsa is calculated according to the following formula:

[0009] Dsa=ds-Wx / (Gx·ρ1);

[0010] Wx=Go×ρ2×|dra-ds|;

[0011] Among them, ds represents the set indoor humidity content, dra represents the humidity content of the indoor air, Wx represents the dehumidification required for the indoor space, Gx represents the fresh air supply volume of the fresh air humidifier, Go represents the volume of the indoor space, ρ1 represents the density of the outdoor air, and ρ2 represents the density of the indoor air.

[0012] In some embodiments, it also includes: an air conditioner; a controller is used for: when the fresh air supply fan slows down to a preset speed value, if the relationship between the detection value of the fresh air humidity detection device and the target air supply humidity content still does not meet the first preset permission condition, then the fresh air supply fan is controlled to resume the preset default speed operation, and the air conditioner starts dehumidification.

[0013] In some embodiments, in the fresh air dehumidification mode, the air conditioner is turned off or operates in a high sensible heat mode.

[0014] In some embodiments, the fresh air blower slows down for a preset time t1 and then returns to determine whether the relationship between the detection value of the fresh air humidity detection device and the target air supply humidity content meets the first preset permission condition. If not, the fresh air blower continues to slow down.

[0015] In some embodiments, it further includes: an air conditioner; the air conditioner includes: a refrigerant circuit formed by a second compressor, a second four-way valve, an outdoor heat exchanger, a second expansion valve, and an indoor heat exchanger;

[0016] The controller shown is used to:

[0017] In the common dehumidification mode, the dehumidification required by the air conditioner is calculated according to the indoor air humidity content and the indoor set humidity content, and the target frequency of the second compressor is obtained by looking up the table according to the dehumidification required by the air conditioner; the second compressor is controlled to operate according to the target frequency.

[0018] In some embodiments, the controller is configured to:

[0019] After the second compressor runs at the target frequency for a preset time t2, it is determined whether the relationship between the indoor return air humidity content and the indoor set humidity content meets the second preset permission condition. If so, the second compressor is shut down; if not, the second compressor is increased in frequency.

[0020] In some embodiments, the dehumidification capacity Wx2 required by the air conditioner is calculated according to the following formula:

[0021] Wx2=Gin×ρ2×|dra-ds|;

[0022] Among them, dra represents the indoor air humidity, ds represents the indoor set humidity; Gin represents the air supply volume of the indoor unit of the air conditioner, and ρ2 represents the density of the indoor air.

[0023] In some embodiments, the controller is used to: in the common dehumidification mode, control the fresh air humidifier to operate according to a preset default speed.

[0024] Another aspect of the present application is a control method for an air treatment system, the air treatment system comprising: a fresh air humidifier, the fresh air humidifier comprising: a fresh air duct; an adsorption component disposed in the fresh air duct, the adsorption component absorbing moisture from the fresh air in the fresh air duct when the fresh air humidifier is in dehumidification operation; a fresh air blower, used to drive the fresh air in the fresh air duct to flow indoors;

[0025] Control methods include:

[0026] Obtain indoor air humidity, indoor set humidity and fresh air supply humidity;

[0027] The target fresh air supply humidity content is calculated based on the indoor air humidity content and the indoor set humidity content;

[0028] Determine whether the relationship between the fresh air supply humidity content and the target supply air humidity content meets the first preset permission condition. If not, control the fresh air supply fan to slow down. If so, maintain the current state. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of a use scenario of an air treatment system according to some embodiments is shown;

[0030] Figure 2 A schematic diagram of a fresh air humidifier of an air handling system according to some embodiments is shown;

[0031] Figure 3 A schematic diagram showing a refrigeration system in a fresh air humidifier of an air handling system according to some embodiments is shown;

[0032] Figure 4 A schematic diagram showing a refrigeration system in an air conditioner of an air handling system according to some embodiments;

[0033] Figure 5 shows a control block diagram of an air handling system according to some embodiments;

[0034] Figure 6 A flow chart showing a fresh air dehumidification mode of an air handling system according to some embodiments;

[0035] Figure 7 A flow chart illustrating a common dehumidification mode of an air handling system according to some embodiments;

[0036] In the above figures: 100, air handling system; 200, air conditioner; 210, outdoor unit; 213, second compressor; 214, outdoor heat exchanger; 215, second four-way valve; 216, second expansion valve; 220, indoor unit; 221, indoor heat exchanger;

[0037] 300, fresh air humidifier; 310, fresh air duct; 320, exhaust air duct; 330, adsorption rotor; 340, fresh air blower; 350, indoor exhaust fan; 360, first heat exchanger; 370, second heat exchanger; 381, first compressor; 382, ​​first four-way valve; 383, first expansion valve;

[0038] 400, controller; 410, memory; 420, communication module; 430, input unit; 440, indoor temperature and humidity detection device; 450, fresh air humidity detection device. DETAILED DESCRIPTION

[0039] In order to make the purpose and implementation method of the present application clearer, the exemplary implementation method of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0040] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0041] Reference Figure 1 The air treatment system 100 of the embodiment of the present application includes an air conditioner 200 and a fresh air humidifier 300.

[0042] The fresh air humidifier 300 usually uses an adsorption component made of adsorption material and a refrigeration system to adjust the sensible heat and latent heat load of the fresh air. Its working principle is mainly to adjust the adsorption inlet temperature through the evaporator of the refrigeration system, and the condenser of the refrigeration system discharges heat to regenerate the adsorption material, thereby achieving continuous adsorption and desorption of the adsorption material.

[0043] There are roughly two structural forms of fresh air humidifiers. One is a rotary structure: the adsorption component is a rotary wheel, and the rotation of the rotary wheel realizes the alternation of adsorption and regeneration; the other is a duct switching structure, in which the adsorption component is fixed, and the fresh air duct and the exhaust air duct are constantly switched to realize the alternation of adsorption and regeneration.

[0044] The structure of the fresh air humidifier 300 is briefly described below by taking a rotary fresh air humidifier as an example:

[0045] Reference Figure 2 The fresh air humidifier 300 includes a fresh air duct 310 and an exhaust air duct 320. The fresh air duct 310 is used to deliver outdoor fresh air into the room, and the exhaust air duct 320 is used to exhaust indoor air to the outside.

[0046] A portion of the adsorption wheel 330 is located in the fresh air duct 310 , and another portion of the adsorption wheel 330 is located in the exhaust air duct 320 .

[0047] The fresh air blower 340 is disposed in the fresh air duct 310 , and is used to drive outdoor fresh air along the fresh air duct 310 into the room.

[0048] The indoor exhaust fan 350 is disposed in the exhaust duct 320 to drive the indoor air to be discharged to the outside along the exhaust duct 320 .

[0049] The first heat exchanger 360 is disposed in the fresh air duct 310 and is located on the windward side of the adsorption wheel 330. The second heat exchanger 370 is disposed in the exhaust air duct 320 and is located on the windward side of the adsorption wheel 330.

[0050] Reference Figure 3 The fresh air humidifier 300 has a refrigeration system, and its structure and working principle are the same as those of the refrigeration system of the air conditioner. The refrigeration system has: a first compressor 381 for compressing the refrigerant; a second heat exchanger 370 for performing heat exchange between the exhaust air and the refrigerant in the exhaust duct 320; a first heat exchanger 360 for performing heat exchange between the fresh air and the refrigerant in the fresh air duct 310; a first four-way valve 382 for selectively guiding the refrigerant compressed by the first compressor 381 to the second heat exchanger 370 or the first heat exchanger 360 according to the dehumidification mode or the humidification mode; and a first expansion valve 383 for decompressing the refrigerant.

[0051] In the dehumidification mode, the first heat exchanger 360 is an evaporator, which reduces the temperature of the fresh air. The adsorption wheel 330 absorbs moisture from the fresh air, so that the fresh air is dehumidified and sent into the room. The second heat exchanger 370 is a condenser, which is used to heat the exhaust air, thereby regenerating the adsorption wheel 330; in the humidification mode, the second heat exchanger 370 is an evaporator, which reduces the temperature of the exhaust air. The adsorption wheel 330 absorbs moisture from the exhaust air. The first heat exchanger 360 is a condenser, which is used to heat the fresh air, so that the moisture absorbed by the adsorption wheel 330 is separated, and the fresh air is humidified.

[0052] The following is a brief description of the air conditioning structure:

[0053] Reference Figure 1 The air conditioner 200 includes an outdoor unit 210 for performing heat exchange between a refrigerant and outdoor air; and an indoor unit 220, which is located in an indoor space and is used to perform heat exchange between a refrigerant and indoor air.

[0054] The outdoor unit 210 and the indoor unit 220 in the air conditioner 200 can be separated. In this case, the outdoor unit 210 is located in the outdoor space, and the indoor unit 220 is located in the indoor space. The indoor unit 220 can be a multi-split unit with multiple units for application in shopping malls, office buildings, factories, etc.

[0055] In other embodiments, the air conditioner 200 can also be an all-in-one machine, that is, the outdoor unit 210 and the indoor unit 220 are integrated in one shell. The all-in-one machine is often seen in ceiling installation scenarios. The outdoor unit 210 is connected to the outdoor space through an air duct, and the indoor unit 220 is connected to the indoor space through an air duct.

[0056] Air conditioning also includes a refrigeration system, combined with Figure 4 The refrigeration system comprises: a second compressor 213 for compressing the refrigerant; an outdoor heat exchanger 214 for performing heat exchange between outdoor air and the refrigerant; an indoor heat exchanger 223 for performing heat exchange between indoor air and the refrigerant; a second four-way valve 215 for selectively guiding the refrigerant compressed by the second compressor 213 to the outdoor heat exchanger 214 or the indoor heat exchanger 221 according to the heating mode or the cooling mode; and a second expansion valve 216 for decompressing the refrigerant.

[0057] The air conditioner has a high sensible heat mode, which refers to an operating mode of the air conditioner when it is cooling or dehumidifying; the sensible heat ratio when the air conditioner is operating in the high sensible heat mode is higher than that in other modes of the air conditioner. When the air conditioner is in the high sensible heat mode, the opening degree of the second expansion valve of the refrigeration system is small, and the operating frequency of the second compressor is low.

[0058] Hereinafter, signal flows between components included in the air handling system will be described.

[0059] Reference Figure 5 The controller 400 is used to receive the detection data of the air conditioner 200 and the fresh air humidifier 300 and change the operation of the air conditioner 200 and the fresh air humidifier 300 after calculation.

[0060] The memory 410 is used to store programs and data related to the operation of the air handling system; the memory 410 can be implemented by at least one of a non-volatile memory (e.g., a cache, a read-only memory (ROM), a programmable ROM (PRO M), an erasable programmable ROM (EPROM) and a flash memory), a volatile memory (e.g., a random access memory (RAM)), or a storage medium such as a hard disk drive (HDD) and a CD-ROM, but is not limited thereto.

[0061] The communication module 420 is used to realize communication between the controller 400 and the air conditioner 200 , and between the controller 400 and the fresh air humidifier 300 ; for example, the detection information of temperature and humidity by the air conditioner 200 and the fresh air humidifier 300 can be shared to the controller 400 through the communication module 320 .

[0062] The communication module 420 may be wired communication or wireless communication. The wireless communication may use at least one of the fifth generation (5G) mobile communication, long term evolution (LTE), advanced LTE (LTE-A), code division multiple access (CDMA), wideband CDMA (WCDMA), universal mobile telecommunications system (UMTS), wireless broadband (WiBro), or global system for mobile communications (GSM) as a cellular communication protocol; in addition, the wireless communication may include local communication, which may include at least one of wireless fidelity (WiFi), Bluetooth, or near field communication (NFC); ​​the wired communication may include at least one of universal serial bus (USB), high definition multimedia interface (HDMI), recommended standard 232 (RS-232), or plain old telephone service (POTS).

[0063] The input unit 430 may receive input from the user, and may include a button switch, a membrane switch, or a touch panel for receiving operation commands for the air handling system. Specifically, the input unit may receive the set indoor humidity ds from the user.

[0064] The indoor humidity detection device 440 may be disposed at the return air outlet of the indoor unit 220 or at the return air outlet of the fresh air humidifier 300 to detect the indoor air humidity dra of the indoor space;

[0065] The fresh air humidity detection device 450 can be arranged at the air outlet of the fresh air humidifier 300 to detect the humidity content dsa of the fresh air supply.

[0066] In the following, a method of operating modes of an air handling system will be described.

[0067] In some embodiments of the present application, a fresh air dehumidification mode in which dehumidification is mainly performed by a fresh air humidifier, and a joint dehumidification mode in which a fresh air humidifier and an air conditioner jointly dehumidify can be implemented.

[0068] <Fresh air dehumidification mode>

[0069] The fresh air humidifier operates in dehumidification mode: the fresh air supply fan operates at the preset default wind speed.

[0070] Reference Figure 6 S100, calculate the dehumidification amount Wx required for the indoor space according to the indoor air humidity content dra and the indoor set humidity content ds, and calculate the target supply air humidity content Dsa according to the indoor required dehumidification amount Wx.

[0071] Wx=Go×ρ2×|dra-ds|;

[0072] Dsa=ds-Wx / (Gx·ρ1);

[0073] ds represents the set indoor humidity content, dra represents the humidity content of the indoor air, Gx represents the fresh air supply volume of the fresh air humidifier, Go represents the indoor space volume, ρ1 represents the density of the outdoor air, and ρ2 represents the density of the indoor air.

[0074] In this application, the dehumidification amount Wx required for the indoor space is estimated based on the indoor air humidity content dra and the indoor set humidity content ds. Compared with the need to set up multiple detection devices such as human body sensors when calculating the dehumidification amount based on the indoor wet load, this application can omit the detection device and simplify the system structure.

[0075] The indoor humidity will change continuously during the dehumidification process of the fresh air humidifier. Therefore, Wx calculated based on the difference between dra and ds is also constantly changing. In this way, the purpose of precise adjustment can be achieved based on the relationship between the current fresh air supply humidity content and the target supply air humidity content.

[0076] S101. Determine whether the relationship between the fresh air supply humidity content dsa and the target supply air humidity content Dsa satisfies the first preset permission condition. If so, proceed to S102. The fresh air humidifier maintains the current operating state. If not, proceed to S103. Reduce the rotation speed of the fresh air supply fan.

[0077] Specifically, the first preset permission condition is: dsa≤Dsa-A, where A is a preset value, for example, A=1.

[0078] If dsa≤Dsa-1 is established, it means that the fresh air supply humidity is not higher than the target supply air humidity, then enter S102 and the fresh air humidifier continues to operate according to the current state; if it is not established, that is, dsa>Dsa-1, it means that the fresh air supply humidity is relatively high, then enter S103 and reduce the speed of the fresh air supply fan.

[0079] If the speed of the fresh air supply fan decreases, the fresh air supply volume will decrease, which can reduce the moisture content of the fresh air supply, thereby reducing the indoor humidity.

[0080] In some embodiments of the present application, the rotation speed of the fresh air blower can be reduced according to a preset multiple. For example, the rotation speed of the fresh air blower is reduced by 10% each time, and then returns to S101 for re-judgment after a preset time t1. If it is still judged as not true, the rotation speed of the fresh air blower continues to be reduced by 10%.

[0081] S104. When the speed of the fresh air blower is reduced to the preset wind speed value, and dsa≤Dsa-1 does not hold, then enter S200, the fresh air humidifier and the air conditioner are in a common humidity control mode.

[0082] Exemplarily, the preset wind speed value is 50% of the default wind speed. When the rotation speed of the fresh air blower is reduced to no more than 50% of the default wind speed, dsa≤Dsa-1 still does not hold, then the mode is switched to the common dehumidification mode.

[0083] The speed of the fresh air blower is relatively low, which means that the fresh air humidifier is also slow in adjusting the indoor humidity, which will affect the user's indoor comfort. At this time, the air conditioner can join in the dehumidification to speed up the adjustment of the indoor humidity.

[0084] In the fresh air dehumidification mode, the air conditioner is in the off or high sensible heat mode to achieve energy saving.

[0085] According to the embodiment of the present application, the fresh air humidifier is used for dehumidification first, and the air conditioner is added for joint dehumidification when the fresh air humidifier has a poor dehumidification effect, so that a balance between energy saving and dehumidification speed can be achieved. If the air handling system directly performs joint dehumidification by the fresh air humidifier and the air conditioner at the beginning, although the dehumidification speed can be guaranteed, it will inevitably cause an increase in energy consumption; if the fresh air humidifier itself can achieve the dehumidification effect, and the air conditioner does not dehumidify, then energy can be saved.

[0086] <Common dehumidification mode>

[0087] Reference Figure 7 , turn on the air conditioner and fresh air humidifier, S201, the fresh air humidifier runs at the preset default frequency and wind speed.

[0088] S202: Obtain a target compressor frequency FX2 of the air conditioner according to the indoor humidity content dra and the set indoor humidity content ds.

[0089] In this step, the required indoor dehumidification amount Wx2 is first calculated according to the formula, and then the target evaporation temperature is obtained by looking up the table, thereby obtaining the target compressor frequency.

[0090] Among them, Wx2=Gin×ρ2×|dra-ds|, Gin is the air supply volume of the air-conditioning indoor unit, and ρ2 represents the indoor air density.

[0091] The memory stores corresponding tables of indoor temperature, humidity, evaporation temperature and dehumidification amount, as well as the compressor frequency corresponding to different evaporation temperatures. These tables are obtained from experimental data.

[0092] Therefore, the dehumidification amount Wx2 is calculated first, and the final target compressor frequency FX can be obtained by looking up the table according to the dehumidification amount Wx2.

[0093] S203, control the second compressor to operate according to the target compressor frequency FX2, and enter S204 after running for a preset time t2.

[0094] S204, judging whether the relationship between the indoor air humidity content and the indoor set humidity content satisfies the second preset permission condition. If so, proceeding to S205, turning off the air conditioner; if not, proceeding to S206, controlling the second compressor to increase the frequency.

[0095] Exemplarily, the second preset permission condition is dra≤ds-A, where A is a preset value. For example, if dra≤ds-1 is true, it means that the return air humidity is close to the indoor set humidity, and the air conditioner no longer needs to perform dehumidification; if dra≤ds-1 is not true, it means that the indoor humidity is still higher than the indoor set humidity, and the air conditioner needs to increase dehumidification.

[0096] In S205, after the air conditioner is turned off, the process goes to S207 at every preset time t3 to determine whether the indoor air humidity is not less than the sum of the indoor set humidity and the preset allowable value. If so, the process goes to S208 to turn on the air conditioner.

[0097] Specifically, dra≥ds+A, A is a preset value, for example, A=1. If dra≥ds+1 is established, it means that the indoor humidity has risen and exceeded the indoor set humidity, and the air conditioner needs to be turned on.

[0098] In specific application scenarios, the indoor environment may experience an increase in humidity due to a sudden increase in the number of people or users doing laundry. Therefore, after the air conditioner is turned off, it is necessary to detect whether the indoor humidity has risen again so as to be able to respond to changes in the indoor humidity in a timely manner.

[0099] In S206, the compressor is operated at an increased frequency. After a preset time t4, the process returns to S204 for re-judgment. If the condition is still not satisfied, the compressor is controlled to continue to increase its frequency.

[0100] <Automatic dehumidification mode>

[0101] The system first enters the fresh air dehumidification mode. During the operation of the fresh air dehumidification mode, when the speed of the fresh air supply fan is reduced to the preset wind speed value and dsa≤Dsa-1 is not established, it automatically enters the common dehumidification mode, and the speed of the fresh air supply fan is restored to the preset default speed.

[0102] The present application sets up a fresh air dehumidification mode, a common dehumidification mode and an automatic dehumidification mode in the air treatment system, which can adapt to the various needs of users. For example, when the room needs light dehumidification (the indoor humidity is not too different from the user's expected humidity), the fresh air dehumidification mode can be selected at this time; when the room needs deep dehumidification (the indoor humidity is quite different from the user's expected humidity), the common dehumidification mode can be selected to speed up the dehumidification speed; or the user can choose automatic dehumidification, and the system will automatically judge.

[0103] In the present application, dehumidification control of the fresh air humidifier or air conditioner is performed according to the dehumidification amount, which can improve the dehumidification efficiency and achieve rapid dehumidification.

[0104] In the present application, the fresh air dehumidification mode is performed when the fresh air humidifier is able to bear the dehumidification capacity, which can achieve the purpose of energy saving compared to the joint dehumidification of the fresh air humidifier and the air conditioner.

[0105] In this application, when the dehumidification capacity is relatively large, the fresh air dehumidifier and the air conditioner can perform dehumidification together to speed up the dehumidification speed.

[0106] In the present application, the dehumidification required for the indoor space is estimated based on the indoor air humidity content dra and the indoor set humidity content ds. Compared with the need to set up multiple detection devices such as human body sensors when calculating the dehumidification amount based on the indoor wet load, the present application can omit the detection device and simplify the system structure.

[0107] In this application, the dehumidification required for the indoor space is estimated based on the indoor air humidity content dra and the indoor set humidity content ds, and then the target supply air humidity is obtained based on the dehumidification amount. According to the relationship between the current fresh air supply air humidity content and the target supply air humidity content, the fresh air humidifier is controlled to achieve the purpose of precise adjustment.

[0108] In the present application, when the humidity of the fresh air supply is relatively high, the fresh air supply volume is reduced by reducing the rotation speed of the fresh air supply blower, so that the fresh air can be fully absorbed by the adsorption component, thereby achieving the purpose of reducing the moisture content of the fresh air supply.

[0109] In the present application, when the speed of the fresh air supply fan is reduced to a certain value, if the indoor humidity still does not meet the requirements, the common dehumidification mode is performed to avoid the problem of slow dehumidification speed when dehumidification is performed only by the fresh air humidifier.

[0110] In this application, fresh air dehumidification mode, common dehumidification mode and automatic dehumidification mode can be realized to meet the diverse needs of users.

[0111] The terms "comprising", "having", etc. are used to specify features, numbers, steps, operations, elements, components, or a combination of features, numbers, steps, operations, elements, and components, but do not exclude the existence or addition of one or more of the features, elements, steps, operations, elements, components, or a combination of features, numbers, steps, operations, elements, and components.

[0112] Terms such as "unit", "part", "block", "member" and "module" indicate a unit for processing at least one function or operation. For example, these terms may refer to at least one process processed by at least one hardware (such as a field programmable gate array (FPGA), an application specific integrated circuit (ASIC)), at least one software stored in a memory or a processor.

[0113] The identification codes are used for convenience of description, but are not intended to indicate the order of each step. Unless the context clearly indicates otherwise, each step can be implemented in an order different from the order shown.

[0114] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application 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 application.

[0116] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. An air treatment system, characterized in that: include: Fresh air humidifier; The fresh air humidifier comprises: Fresh air duct; An adsorption component is arranged in the fresh air duct, and when the fresh air humidifier is in dehumidification operation, the adsorption component absorbs moisture from the fresh air in the fresh air duct; A fresh air blower is used to drive the fresh air in the fresh air duct to flow indoors; The air treatment system further comprises: Fresh air humidity detection device, used to detect the humidity content of fresh air supply; Return air humidity detection device, used to detect indoor air humidity; The air treatment system further comprises: Controller for: In the fresh air dehumidification mode, the target supply air humidity content is calculated based on the detection value of the return air humidity detection device and the set indoor humidity content; when the relationship between the detection value of the fresh air humidity detection device and the target supply air humidity content does not meet the first preset permissible condition, the fresh air supply fan is controlled to slow down.

2. The air treatment system according to claim 1, characterized in that The target air supply humidity content Dsa is calculated according to the following formula: Dsa=ds-Wx / (Gx·ρ1); Wx=Go×ρ2×|dra-ds|; Among them, ds represents the set indoor humidity content, dra represents the humidity content of the indoor air, Wx represents the dehumidification required for the indoor space, Gx represents the fresh air supply volume of the fresh air humidifier, Go represents the volume of the indoor space, ρ1 represents the density of the outdoor air, and ρ2 represents the density of the indoor air.

3. The air treatment system according to claim 1, characterized in that Also includes: air conditioner; In the fresh air dehumidification mode, the air conditioner is turned off or operates in high sensible heat mode.

4. The air treatment system according to claim 3, characterized in that: The controller is used to: When the fresh air supply fan slows down to the preset wind speed value, and the relationship between the detection value of the fresh air humidity detection device and the target supply air humidity content still does not meet the first preset permission condition, the fresh air supply fan is controlled to resume operation at the preset default speed, and the air conditioner starts dehumidification.

5. The air treatment system according to claim 1, characterized in that After the fresh air supply fan slows down for a preset time t1, it returns to determine whether the relationship between the detection value of the fresh air humidity detection device and the target air supply humidity content meets the first preset permission condition. If not, the fresh air supply fan continues to slow down.

6. The air treatment system according to claim 1, characterized in that Also includes: air conditioner; The air conditioner comprises: a refrigerant circuit formed by a second compressor, a second four-way valve, an outdoor heat exchanger, a second expansion valve and an indoor heat exchanger; The controller shown is used to: In the common dehumidification mode, the dehumidification amount required by the air conditioner is calculated according to the indoor air humidity content and the indoor set humidity content, and the target frequency of the second compressor is obtained according to the dehumidification amount required by the air conditioner; the second compressor is controlled to operate according to the target frequency.

7. The air treatment system according to claim 6, characterized in that The controller is used to: After the second compressor runs at the target frequency for a preset time t2, it is determined whether the relationship between the indoor return air humidity content and the indoor set humidity content meets the second preset permission condition. If so, the second compressor is shut down; if not, the second compressor is increased in frequency.

8. The air treatment system according to claim 6, characterized in that The dehumidification capacity Wx2 required by the air conditioner is calculated according to the following formula: Wx2=Gin×ρ2×|dra-ds|; Among them, dra represents the indoor air humidity, ds represents the indoor set humidity; Gin represents the air supply volume of the indoor unit of the air conditioner, and ρ2 represents the density of the indoor air.

9. The air treatment system according to claim 6, characterized in that: The controller is used to: In the common dehumidification mode, the fresh air humidifier is controlled to run at the preset default speed.

10. A control method for an air handling system, characterized in that: The air handling system comprises: Fresh air humidifier, the fresh air humidifier comprises: Fresh air duct; An adsorption component is arranged in the fresh air duct, and when the fresh air humidifier is in dehumidification operation, the adsorption component absorbs moisture from the fresh air in the fresh air duct; A fresh air blower is used to drive the fresh air in the fresh air duct to flow indoors; The control method comprises: Obtain indoor air humidity, indoor set humidity and fresh air supply humidity; The target air supply humidity content is calculated based on the indoor air humidity content and the indoor set humidity content; Determine whether the relationship between the fresh air supply humidity content and the target supply air humidity content meets the first preset permission condition. If not, control the fresh air supply fan to slow down. If so, maintain the current state.

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