A control method of a low-energy fresh air humidification system

Abstract

The application discloses a control method of a low-energy-consumption fresh air humidification system, and comprises the following steps: step S1, starting a main program, judging whether the equipment is started up or not; step S2, judging whether a current system mode is an automatic mode or not; step S3, judging whether a current system is an automatic air speed or not; step S4, a data sampler sampling data; step S5, controlling a fresh air fan air speed according to a sampling result; and step S6, the fresh air fan air speed operating according to a highest demand. Through the method, various quality parameters of indoor air can be comprehensively detected, the air quality parameters are analyzed, and the air quality is adjusted, a user can set the system to a preset mode through operation, the system can automatically operate according to the system specific mode, or the air parameter threshold is adjusted to meet different user environment requirements and adjust the environment to suitable conditions.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically a control method for a low-energy fresh air humidification system. Background Technology

[0002] In northern China, especially in the northwest region represented by Yinchuan, annual precipitation is relatively low, and the climate is particularly dry in autumn and winter. After heating is turned on in winter, the relative humidity indoors remains around 20% for a long time, leading to dry skin, sore throat, poor human comfort, static electricity, and other negative effects. In spring, strong winds and sandstorms, along with pollen from plants such as wormwood, cause serious air pollution. Keeping windows closed for extended periods leads to indoor oxygen deficiency and poor air quality.

[0003] In the prior art, for example, the technical solution described in the patent with publication number CN114777209A is as follows: a humidification device, a fresh air fan having the same, and a fresh air humidification method, including a wet film, a heat exchanger, and a circulating water tank. The circulating water tank is equipped with a circulating water pump for pumping humidifying water. The inlet of the heat exchanger is connected to the outlet of the circulating water pump, and the outlet of the heat exchanger is connected to the wet film. The heat exchanger heats the humidifying water by the hot air flowing through it.

[0004] Currently, household humidifiers mainly focus on ultrasonic humidification, which has a large humidification capacity and low energy consumption, but has problems such as "white powder pollution" and bacterial growth; wet film humidifiers are energy-saving and quiet, but have problems such as small humidification capacity and easy bacterial growth; PTC electric heating humidifiers are safe and reliable and have a large humidification capacity, but have the problem of high energy consumption. Summary of the Invention

[0005] The purpose of this invention is to provide a control method for a low-energy fresh air humidification system, in order to solve the problems mentioned in the background art, such as the white powder pollution and bacterial growth of ultrasonic humidification; the small humidification capacity and easy bacterial growth of wet film humidifiers; and the high energy consumption of PTC electric heating humidifiers.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A control method for a low-energy fresh air humidification system includes the following steps:

[0008] Step S1: The main program starts and determines whether the device is powered on. If it is, proceed to the next step; otherwise, wait for the device to power on.

[0009] Step S2: Determine whether the current system mode is automatic mode. If it is automatic mode, proceed to step S3. If not, mode determination is required first.

[0010] Step S3, judging whether the current system is an automatic wind speed, if the current system is set to an automatic wind speed, then entering step S4, if not, judging the wind speed of the current system;

[0011] Step S4, the data data sampler performs data sampling; the data sampling includes: RH sampling, CO2 sampling and PM2.5 sampling;

[0012] Step S5, analyzing the sampling results of RH sampling, CO2 sampling and PM2.5 sampling to determine the highest demand of the user;

[0013] Step S6, the wind speed of the fresh air machine runs according to the highest demand.

[0014] According to the above technical solution, in step S2, the mode judgment is specifically: judging whether the current system is a fresh air mode, if the current system is a fresh air mode, then the system runs in a fresh air state; if not, the system runs in an internal circulation mode; after the judgment is finished, entering step S3.

[0015] According to the above technical solution, in step S3, the judgment of the wind speed of the current system is specifically: judging whether the current system runs at high speed, medium speed or low speed, after the wind speed judgment is completed, returning to step S4.

[0016] According to the above technical solution, in step S4, the RH sampling is specifically:

[0017] Step S401, judging whether the RH sampling value is greater than the RH setting value, if yes, the humidity reaches the target value, stopping the humidifying runner and opening the drain valve, discharging the water in the water tank clean, keeping the water tank clean, and jumping back to step S5; if not, opening the water inlet valve and starting the humidifying runner, continuing to humidify, and entering step S402;

[0018] Step S402, judging whether the middle water level switch is closed, if yes, it means that the water in the water tank meets the humidification demand, then entering step S403; if not, opening the water inlet valve to supplement the water in the water tank until the middle water level switch is closed;

[0019] Step S403, closing the water inlet valve and running the humidifying runner to start humidifying;

[0020] Step S404, comparing the collected RH data with the RH setting value, and controlling the fresh air machine to run at different speeds according to the collected comparison results.

[0021] According to the above technical solution, in step S404, the specific way of the fresh air machine control is:

[0022] When the difference between the RH sampling value and the RH setting value is less than-20, the fresh air machine runs at high speed;

[0023] When the difference between the RH sampling value and the RH setting value is -20 to -10, the fresh air machine runs at a medium speed;

[0024] When the difference between the RH sampling value and the RH setting value is -10 to 0, the fresh air machine runs at a low speed;

[0025] When the difference between the RH sampling value and the RH setting value is greater than 0, the fresh air machine stops running.

[0026] According to the above technical solution, in step S4, the CO2 sampling is specifically: judging whether the CO2 sampling value is greater than the setting value; if yes, entering the fresh air mode, and controlling the fresh air machine speed according to the CO2 sampling value and the CO2 setting value; if not, entering the internal circulation mode.

[0027] According to the above technical solution, in the fresh air mode, the fresh air machine speed is controlled according to the CO2 sampling value and the CO2 setting value, which is specifically:

[0028] When the difference between the CO2 sampling value and the CO2 setting value is greater than 200, the fresh air machine runs at a high speed;

[0029] When the difference between the CO2 sampling value and the CO2 setting value is 100 to 200, the fresh air machine runs at a medium speed;

[0030] When the difference between the CO2 sampling value and the CO2 setting value is 0 to 100, the fresh air machine runs at a low speed;

[0031] When the difference between the CO2 sampling value and the CO2 setting value is less than 0, the fresh air machine stops running.

[0032] According to the above technical solution, in step S4, according to the PM2.5 sampling value and the PM2.5 setting value, the system running is specifically:

[0033] When the difference between the PM2.5 sampling value and the PM2.5 setting value is greater than 40, the fresh air machine runs at a high speed;

[0034] When the difference between the PM2.5 sampling value and the PM2.5 setting value is 20 to 40, the fresh air machine runs at a medium speed;

[0035] When the difference between the PM2.5 sampling value and the PM2.5 setting value is 0 to 20, the fresh air machine runs at a low speed;

[0036] When the difference between the PM2.5 sampling value and the PM2.5 setting value is less than 0, the fresh air machine stops running.

[0037] Compared with the prior art, the present application has the following beneficial effects:

[0038] Through the method in the application, various quality parameters of indoor air can be comprehensively detected, air quality parameters are analyzed, air quality is adjusted, a user can set the system to a preset mode through operation, and the system automatically operates according to the system specific mode. Or the air parameter threshold is adjusted to meet different user environment requirements while adjusting the environment to suitable conditions. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 The system flowchart of the application is shown in the figure.

[0040] Figure 2 The RH sampling flowchart of the application is shown in the figure.

[0041] Figure 3 The CO2 sampling flowchart of the application is shown in the figure.

[0042] Figure 4 The PM2.5 sampling flowchart of the application is shown in the figure.

[0043] Figure 5 The humidification module structure diagram of the application is shown in the figure.

[0044] Marked in the figure: 100 - fresh air outlet, 200 - return air outlet, 300 - fresh air inlet, 400 - return air inlet, 500 - primary filter screen, 600 - secondary filter screen, 700 - heat exchange core, 800 - tertiary filter screen, 900 - air valve, 110 - humidification roller, 111 - water tank, 112 - drain pipe, 113 - liquid level switch, 114 - first heat exchanger, 115 - water inlet pipe, 116 - second heat exchanger, 117 - first fan, 118 - second fan, 119 - electric control assembly. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0046] Embodiment one

[0047] As shown in the figure, a control method of a low-energy-consumption fresh air humidification system, characterized by comprising the following steps: Figure 1

[0048] Step S1, the main program is started, and it is judged whether the equipment is started or not. If yes, the next step is performed, and if not, the equipment is waited to be started.

[0049] ​Step S2, judge whether the current system mode is automatic mode, if it is automatic mode, enter step S3, if not, need to judge the mode first;

[0050] Step S3, judge whether the current system is automatic wind speed, if the current system is set to automatic wind speed, enter step S4, if not, judge the wind speed of the current system;

[0051] Step S4, data data sampler carries out data sampling; Data sampling includes: RH sampling, CO2 sampling and PM2.5 sampling;

[0052] Step S5, the sampling results of RH sampling, CO2 sampling and PM2.5 sampling are analyzed to determine the highest demand;

[0053] Step S6, the wind speed of the fresh air machine runs according to the highest demand.

[0054] Through the method in the application, the quality parameters of indoor air can be comprehensively detected, the air quality parameters are analyzed, the air quality adjusting equipment (preheating module, fresh air purification module and humidifying module) is controlled to adjust the air quality, the user can set the system to the preset mode by operation, and the system will automatically run according to the specific mode of the system. Or adjust through the air parameter threshold to meet the different user environment requirements while adjusting the environment to the appropriate conditions.

[0055] Example two

[0056] This embodiment is a further refinement of example one.

[0057] In step S2, the mode judgment is specifically: judge whether the current system is a fresh air mode, if the current system is a fresh air mode, the system runs in fresh air state; If not, the system runs in internal circulation mode; After the judgment is finished, enter step S3.

[0058] In step S3, the judgment of the wind speed of the current system is specifically: judge whether the current system runs at high speed, medium speed or low speed, after the wind speed is judged, return to step S4.

[0059] As shown in Figure 2 In step S4, RH sampling is specifically:

[0060] Step S401, judge whether the RH sampling value is greater than the RH setting value, if yes, the humidity reaches the target value, stop the humidifying runner and open the drain valve, drain the water in the water tank clean, keep the water tank clean, and jump back to step S5; If not, open the water inlet valve and start the humidifying runner, continue to humidify, and enter step S402;

[0061] Step S402, judge whether the middle water level switch is closed, if yes, it means that the water tank meets the humidification demand, then enter step S403; if not, open the water inlet valve to supplement the water tank until the middle water level switch is closed;

[0062] Step S403, close the water inlet valve and run the humidification water wheel to start humidification;

[0063] Step S404, compare the collected RH data with the set value of RH, and control the fresh air fan to run at different speeds according to the collected comparison results.

[0064] In step S404, the specific way of fresh air fan control is:

[0065] When the difference between the RH sampling value and the RH set value is less than -20, the fresh air fan runs at high speed;

[0066] When the difference between the RH sampling value and the RH set value is -20 to -10, the fresh air fan runs at medium speed;

[0067] When the difference between the RH sampling value and the RH set value is -10 to 0, the fresh air fan runs at low speed;

[0068] When the difference between the RH sampling value and the RH set value is greater than 0, the fresh air fan stops running.

[0069] As shown in Figure 3 Step S4, the CO2 sampling is specifically: judge whether the CO2 sampling value is greater than the set value; if yes, enter the fresh air mode and control the fresh air fan speed according to the CO2 sampling value and the CO2 set value; if not, enter the internal circulation mode.

[0070] In the fresh air mode, the specific way of controlling the fresh air fan speed according to the CO2 sampling value and the CO2 set value is:

[0071] When the difference between the CO2 sampling value and the CO2 set value is greater than 200, the fresh air fan runs at high speed;

[0072] When the difference between the CO2 sampling value and the CO2 set value is 100 to 200, the fresh air fan runs at medium speed;

[0073] When the difference between the CO2 sampling value and the CO2 set value is 0 to 100, the fresh air fan runs at low speed;

[0074] When the difference between the CO2 sampling value and the CO2 set value is less than 0, the fresh air fan stops running.

[0075] As shown in Figure 4 In step S4, according to the PM2.5 sampling value and the PM2.5 set value, the specific way of judging the system operation is:

[0076] When the difference between the sampling value of PM2.5 and the PM2.5 setting value is greater than 40, the fresh air machine runs at high speed;

[0077] When the difference between the sampling value of PM2.5 and the PM2.5 setting value is 20 to 40, the fresh air machine runs at medium speed;

[0078] When the difference between the sampling value of PM2.5 and the PM2.5 setting value is 0 to 20, the fresh air machine runs at low speed;

[0079] When the difference between the sampling value of PM2.5 and the PM2.5 setting value is less than 0, the fresh air machine stops running.

[0080] The sampling results of RH sampling, CO2 sampling and PM2.5 sampling are analyzed to determine a specific embodiment of the highest demand:

[0081] For example, when the RH sampling value is 25 and the RH setting value is 40, the difference between the RH sampling value and the RH setting value is -15, and the fresh air machine should run at medium speed;

[0082] When the sampling value of CO2 is 400 and the CO2 setting value is 100, the difference between the sampling value of CO2 and the CO2 setting value is 300, and the fresh air machine should run at high speed;

[0083] When the sampling value of PM2.5 is 15 and the PM2.5 setting value is 5, the fresh air machine should run at low speed;

[0084] And the fresh air machine runs at the highest demand, wherein the highest demand is that the difference between the sampling value of CO2 and the CO2 setting value is 300, and the fresh air machine should run at high speed, and finally the fresh air machine runs at high speed.

[0085] Example three

[0086] This embodiment is a further refinement of example two.

[0087] The present application mainly realizes indoor comfort, clean environment, selects low energy consumption humidifying module and fresh air equipment with energy recovery, and simultaneously detects indoor temperature, humidity, PM2.5 concentration and CO2 concentration in real time through detection technology, controls the operation mode of the equipment through software algorithm, reduces energy consumption loss, and achieves the purpose of energy saving and environmental protection.

[0088] The main composition and main role of each module of the present application are introduced as follows:

[0089] 1、Operation display module: composed of segment code liquid crystal or TFT liquid crystal display screen, touch screen, touch key or mechanical key, main control chip, used to display environmental parameters, equipment state, communication with air quality detection module, etc. Through the key, the system can be set and operated. Through communication with the air quality detection module, the terminal of the air quality adjustment equipment is instructed to coordinate the operation of the equipment. At the same time, it has WiFi and Bluetooth modules to communicate with wireless portable devices to realize remote operation. The control chip uses a single-chip microcomputer, which has the advantages of high integration, small size, simple structure, reliable performance, low working voltage and low power consumption, saving energy.

[0090] The operation display module is used to set the environmental parameter target, coordinate the operation of each device through algorithm, create a comfortable indoor living environment, reduce the running time and mode of the device, and thus reduce the energy consumption.

[0091] 2、Air quality detection module: integrated with one or more of PM2.5 detection sensor, PM10 detection sensor, TVOC detection sensor, formaldehyde detection sensor, CO2 detection sensor, and temperature and humidity detection sensor, which can detect various quality parameters of indoor air in all directions. The control chip analyzes the air quality parameters, and the analysis data is displayed directly through the operation display module / intelligent terminal, making it easy for users to understand the current air quality in real time, control the air quality adjustment equipment (preheating module, fresh air purification module, humidification module) to adjust the air quality, and users can set the system to a preset mode through the operation display module. The system will automatically run according to the system-specific mode. Or adjust through the air parameter threshold to meet the different environmental needs of users while adjusting the environment to the appropriate target. Users can also adjust the system through APP / applet on portable and mobile intelligent terminals.

[0092] 3、Air quality adjustment equipment: including fresh air purification module, humidification module, preheating module, responsible for adjusting the temperature, humidity, cleanliness and freshness of indoor air.

[0093] 3.1) Fresh air purification module: by introducing outdoor fresh air, removing indoor harmful gases such as formaldehyde, keeping the indoor air fresh. The purification module is used to filter the indoor air, the first filter screen is usually used to filter large particles such as mosquitoes, dust, fibers and pet hair. The second filter screen can remove smaller particles such as bacteria, pollen and some fine dust. The third filter screen can filter particles larger than 0.3um, so it can effectively remove PM2.5, PM10 and other particulate pollutants; the fresh air purification module is provided with a heat exchange core to exchange heat between the indoor exhaust hot air and the fresh incoming air, reducing energy loss; in addition, the module increases the internal circulation function, when the indoor oxygen content meets the set target, the device switches from fresh air mode to internal circulation mode, further reducing the loss of indoor energy, achieving the purpose of energy saving and environmental protection.

[0094] 3.2) Humidification module: the present application adopts a roller humidification device, which automatically removes negative oxygen ions and water molecules when the flowing air passes through, thereby achieving the effects of cleaning air and air humidification.

[0095] Because water evaporation is closely related to temperature. When the water temperature rises, the movement speed of water molecules increases, thereby enhancing the evaporation performance of water. Therefore, the humidification module integrates a heat exchanger, which can introduce a heat source to preheat the water.

[0096] 3.3) Preheating module: in view of the current situation of central heating in the north, the heating waterway is connected to the heat exchanger of the fresh air equipment, which heats the air introduced into the room in the winter heating season. The heating waterway is introduced into the heat exchanger to preheat the water, which improves the humidification capacity without increasing the energy consumption of the module.

[0097] Example four

[0098] The embodiment provides a specific structure of an air quality adjusting device, which comprises a shell, a fresh air duct and a return air duct are arranged in the shell; wherein one end of the fresh air duct is connected with a fresh air inlet 300, and the other end of the fresh air duct is connected with a fresh air outlet 100.

[0099] As shown in Figure 5 , the inside of the fresh air duct is further provided with a filter screen, a heat exchange core 700, a humidifying roller 110, a humidifying assembly and a heat exchange assembly; the filter screen comprises a first filter screen 500, a second filter screen 600 and a third filter screen 800; wherein the first filter screen 500, the second filter screen 600 and the third filter screen 800 are sequentially arranged from top to bottom, the first filter screen 500 is arranged at a position close to the fresh air inlet 300, and the heat exchange core 700 is arranged between the second filter screen and the third filter screen 800.

[0100] The heat exchange core 700 is also in communication with the return air duct, and two ends of the heat exchange core 700 are in communication with the return air inlet 400 and the return air outlet 200 respectively; the heat exchange core 700 is used for heat exchange between the fresh air duct and the return air duct.

[0101] A connecting port is further arranged on the fresh air duct, the connecting port is used for communication between the fresh air duct and the return air duct, and an air valve 900 is arranged on the connecting port, the air valve 900 is used for switching the connection mode of the fresh air and the return air.

[0102] The humidifying roller 110 is arranged inside the fresh air duct, and the humidifying roller 110 is arranged inside the air valve 900.

[0103] The humidifying assembly is arranged at the bottom of the shell; the humidifying assembly comprises a water tank 111, a drain pipe 112, a liquid level switch 113, a first heat exchanger 114 and a water inlet pipe 115.

[0104] The water inlet pipe 115 is connected with the water tank 111, the water tank 111 is arranged below the humidifying roller 110; water is injected into the inside of the water tank 111 through the water inlet pipe 115, and the water is heated through the heat exchanger. The heat exchanger is used for recovering indoor temperature and humidity, and reducing energy loss.

[0105] The liquid level switch 113 is arranged inside the water tank 111 and is used for detecting the water level in the water tank 111.

[0106] The inside of the fresh air duct is further provided with a second heat exchanger 116; the second heat exchanger 116 is arranged above the humidifying assembly. The second heat exchanger 116 uses the free heat source of the northern central heating to heat the fresh air entering the indoor.

[0107] A first fan 117 is arranged inside the fresh air duct, and the first fan 117 is arranged inside the fresh air outlet 100; a second fan 118 is arranged inside the return air duct, and the second fan 118 is arranged inside the return air outlet 200.

[0108] The side of the shell is further provided with an electric control assembly 119, which is used for controlling the operation of the humidifying system.

[0109] Specifically, the humidifying roller 110 comprises a plurality of hydrophilic disc (for example, 10), when the humidifying roller 110 rotates, the water drops in the water tank 111 collide with the hydrophilic disc, and the water is atomized into fine particles (5-20um) without water drops, and then is blown into the air to complete humidification.

[0110] It is to be noted that, in the present text, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0111] Finally, it should be noted that the above-mentioned only constitutes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications, equivalent replacements, improvements and the like of the technical solutions described in the foregoing embodiments can still be made. Any modifications, equivalent replacements, improvements and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A control method of a low-energy fresh air humidification system, characterized in that: The method comprises the following steps: Step S1, the main program is started, and it is judged whether the device is powered on. If yes, the next step is performed, and if not, the device is waited to be powered on; Step S2, it is judged whether the current system mode is an automatic mode. If yes, step S3 is entered, and if not, the mode is judged. The mode judgment is specifically: it is judged whether the current system is a fresh air mode. If the current system is the fresh air mode, the system runs in the fresh air state. If not, the system runs in the internal circulation mode. After the judgment, step S3 is entered; Step S3, it is judged whether the current system is an automatic wind speed. If the current system is set to the automatic wind speed, step S4 is entered, and if not, the wind speed of the current system is judged; Step S4, the data data sampler samples data; The data sampling comprises: RH sampling, CO2 sampling and PM2.5 sampling; The RH sampling is specifically: in step S401, it is judged whether the RH sampling value is greater than the RH setting value. If yes, the humidity reaches the target value, the humidifying runner is stopped, the drain valve is opened, the water in the water tank is discharged clean, the water tank is kept clean, and step S5 is returned. If not, the water inlet valve is opened, and the humidifying runner is started, and step S402 is entered; In step S402, it is judged whether the middle water level switch is closed. If yes, it indicates that the water in the water tank meets the humidifying demand, and step S403 is entered. If not, the water inlet valve is opened, and the water tank is supplemented until the middle water level switch is closed; In step S403, the water inlet valve is closed, and the humidifying runner is run, and the humidifying is started; In step S404, the collected RH data is compared with the RH setting value, and according to the collected comparison result, the fresh air machine is controlled to run at different speeds; In step S5, the sampling results of the RH sampling, the CO2 sampling and the PM2.5 sampling are analyzed, and the highest demand of the user is determined; In step S6, the wind speed of the fresh air machine runs according to the highest demand.

2. The control method of the low-energy fresh air humidification system according to claim 1, characterized in that: In step S3, the wind speed of the current system is judged. Specifically, it is judged whether the current system runs at high speed, medium speed or low speed. After the wind speed judgment is completed, step S4 is returned.

3. The control method of the low-energy consumption fresh air humidifying system according to claim 1, characterized in that: In step S404, the specific way of the fresh air machine control is: When the difference between the RH sampling value and the RH setting value is less than -20, the fresh air machine runs at high speed; When the difference between the RH sampling value and the RH setting value is -20 to -10, the fresh air machine runs at medium speed; When the difference between the RH sampling value and the RH setting value is -10 to 0, the fresh air machine runs at low speed; When the difference between the RH sampling value and the RH setting value is greater than 0, the fresh air machine stops running.

4. The control method of the low-energy consumption fresh air humidifying system according to claim 1, characterized in that: In step S4, the CO2 sampling is specifically: it is judged whether the CO2 sampling value is greater than the setting value. If yes, the fresh air mode is entered, and the wind speed of the fresh air machine is controlled according to the CO2 sampling value and the CO2 setting value. If not, the internal circulation mode is entered.

5. The control method of the low-energy consumption fresh air humidifying system according to claim 4, characterized in that: In the fresh air mode, the wind speed of the fresh air machine is controlled according to the CO2 sampling value and the CO2 setting value. Specifically: When the difference between the CO2 sampling value and the CO2 setting value is greater than 200, the fresh air machine runs at high speed; When the difference between the sampling value of CO2 and the set value of CO2 is 100-200, the fresh air machine runs at medium speed; When the difference between the sampling value of CO2 and the set value of CO2 is 0-100, the fresh air machine runs at low speed; When the difference between the sampling value of CO2 and the set value of CO2 is less than 0, the fresh air machine stops running.

6. The control method of the low-energy consumption fresh air humidifying system according to claim 1, characterized in that: In step S4, according to the PM2.5 sampling value and the set value of PM2.5, the running of the system is judged, which is specifically: When the difference between the sampling value of PM2.5 and the set value of PM2.5 is greater than 40, the fresh air machine runs at high speed; When the difference between the sampling value of PM2.5 and the set value of PM2.5 is 20-40, the fresh air machine runs at medium speed; When the difference between the sampling value of PM2.5 and the set value of PM2.5 is 0-20, the fresh air machine runs at low speed; When the difference between the sampling value of PM2.5 and the set value of PM2.5 is less than 0, the fresh air machine stops running.

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