A humidity self-regulating system and method for a fuel cell vehicle

Abstract

The present invention discloses a humidity self-regulating system and method for a fuel cell vehicle, the system comprising: an exhaust gas mixing subsystem, a humidity regulating subsystem and an air conditioning and air supply subsystem. The exhaust gas mixing subsystem comprises a gas-liquid separator, a drainage box and an exhaust box, the humidity regulating subsystem comprises a humidity controller, a humidity regulating valve, an outside temperature detector and a cabin humidity detector, and the humidity regulating valve is respectively connected to the water outlet of the drainage box, the exhaust outlet of the exhaust box and the air inlet of the air conditioning and air supply subsystem through a pipeline. The humidity controller is used to adjust the opening of the humidity regulating valve based on the measured temperature value collected by the outside temperature detector and the measured humidity value collected by the cabin humidity detector, so as to control the mixing ratio of the liquid flowing out of the drainage box and the gas discharged from the exhaust box, and make the mixed gas flow into the air conditioning and air supply subsystem. The air conditioning and air supply subsystem is used to send the mixed gas into the cabin to adjust the air humidity in the cabin.

Description

Technical Field

[0001] The present invention relates to the field of fuel cell vehicle control technology, and in particular to a humidity self-regulating system and method for a fuel cell vehicle. Background Art

[0002] Environmental comfort is crucial for drivers, especially humidity. High humidity makes it difficult for the human body to dissipate heat, and excessive cabin humidity can cause fog, water droplets, and ice formation, leading to microbial growth in the interior and wiring harnesses. Low humidity can dry out the nasopharynx, lips, and eyes, causing rough skin and increasing susceptibility to infectious diseases. Prolonged dryness can reduce work efficiency, especially in winter when the car's heating is on, which can cause abnormal dryness. To improve driving comfort, cabin humidity should be adjusted.

[0003] Currently, there are many shortcomings in the humidity control devices installed after sales on the market, such as: the humidity control is not intelligent enough and the control accuracy is poor. Summary of the Invention

[0004] The embodiments of the present application provide a humidity self-regulating system and method for a fuel cell vehicle. The system can adaptively adjust the air humidity in the vehicle cabin, improve the accuracy of humidity control, and ensure that the humidity in the cabin is continuously maintained within an appropriate range.

[0005] In a first aspect, the present invention provides the following technical solutions through an embodiment of the present invention:

[0006] A humidity self-regulating system for a fuel cell vehicle, comprising: an exhaust gas mixing subsystem, a humidity regulating subsystem and an air conditioning and air supply subsystem; the exhaust gas mixing subsystem comprises a gas-liquid separator, a drainage box and an exhaust box, the input port of the gas-liquid separator is connected to the exhaust gas output port of the fuel cell, the first output port of the gas-liquid separator is connected to the water inlet of the drainage box, and the second output port is connected to the air inlet of the exhaust box through a pipe; the humidity regulating subsystem comprises a humidity controller, a humidity regulating valve, an outside temperature detector and a cabin humidity detector, the first input port of the humidity regulating valve is connected to the water outlet of the drainage box through a pipe, the second input port is connected to the exhaust box The exhaust port is connected to the air inlet of the air conditioning and air supply subsystem through a pipe, and the output port is connected to the air inlet of the air conditioning and air supply subsystem through a pipe. The humidity controller is respectively connected to the control end of the humidity control valve, the outside temperature detector and the cabin humidity detector; the humidity controller is used to adjust the opening of the humidity control valve based on the measured temperature value collected by the outside temperature detector and the measured humidity value collected by the cabin humidity detector, so as to control the mixing ratio of the liquid flowing out of the drainage box and the gas discharged from the exhaust box; the air conditioning and air supply subsystem is used to send the mixed gas output from the output port of the humidity control valve into the cabin to adjust the air humidity in the cabin.

[0007] Preferably, the humidity regulating subsystem further comprises: a shut-off valve, which is provided on a connecting pipe between the humidity regulating valve and the air inlet of the air-conditioning and air-supply subsystem.

[0008] Preferably, the system also includes an air compressor, and the humidity regulation subsystem also includes: an air pressure regulating valve and a first pressure detector; one end of the air pressure regulating valve is connected to the output end of the air compressor, and the other end of the air pressure regulating valve is connected to the water inlet of the drainage box and the air inlet of the exhaust box through pipes, respectively. The first pressure detector is arranged on the pipe between the air pressure regulating valve and the water inlet of the drainage box and the air inlet of the exhaust box, and is used to collect the air pressure value at the pipe to obtain a first pressure value; the control end of the air pressure regulating valve and the first pressure detector are both connected to the humidity controller, and the humidity controller is used to adjust the opening of the air pressure regulating valve based on the first pressure value, so that the first pressure value is within a first preset pressure range.

[0009] Preferably, the humidity regulation subsystem also includes: a second pressure detector, which is arranged between the humidity regulation valve and the air inlet of the air conditioning and air supply subsystem, and is used to collect the pressure value of the mixed gas flowing out of the output port of the humidity regulation valve to obtain a second pressure value; the control end of the second pressure detector is connected to the humidity controller, and the humidity controller is used to adjust the opening of the air pressure regulating valve based on the second pressure value, so that the pressure of the mixed gas flowing out of the output port of the humidity regulation valve is within a second preset pressure range.

[0010] Preferably, the system further includes an air compressor, and the humidity regulation subsystem further includes: an air pressure regulating valve, a first pressure detector, a second pressure detector, a water pump and a three-way valve; one end of the air pressure regulating valve is connected to the output end of the air compressor, and the other end of the air pressure regulating valve is connected to the air inlet of the exhaust box through a pipe, and the first pressure detector is arranged on the pipe between the air pressure regulating valve and the air inlet of the exhaust box, and is used to collect the air pressure value at the pipe to obtain a first pressure value; the control end of the air pressure regulating valve and the first pressure detector are both connected to the humidity controller, and the humidity controller is used to adjust the opening of the air pressure regulating valve based on the first pressure value so that the first pressure value is within a first preset pressure range; the input end of the water pump is connected to The water outlet of the drainage box is connected through a pipeline, the output end of the water pump is connected to the first input port of the three-way valve, the second input port of the three-way valve is connected to the water inlet of the drainage box, and the output port of the three-way valve is connected to the first input port of the humidity regulating valve. The second pressure detector is arranged between the humidity regulating valve and the air inlet of the air-conditioning and air supply subsystem, and is used to collect the pressure value of the mixed gas flowing out of the output port of the humidity regulating valve to obtain a second pressure value; the control end of the water pump and the control end of the second pressure detector are connected to the humidity controller, and the humidity controller is also used to adjust the opening of the air pressure regulating valve and the speed of the water pump based on the second pressure value, so that the pressure of the mixed gas flowing out of the output port of the humidity regulating valve is within a second preset pressure range.

[0011] Preferably, the exhaust gas mixing subsystem also includes: a water level detector, which is arranged in the drainage box and is used to detect the water level of the drainage box; the water level detector is connected to the humidity controller, and the humidity controller is also used to: if it is detected that the water level is lower than the preset water level height, then issue a water level abnormality reminder.

[0012] Preferably, the humidity regulation subsystem also includes: an atomizer, the input port of the atomizer is connected to the output port of the humidity regulation valve, the output port of the atomizer is connected to the air inlet of the air conditioning and ventilation subsystem through a pipe, and the atomizer is used to disperse the mixed gas flowing out of the humidity regulation valve and inject the dispersed mixed gas into the air conditioning and ventilation subsystem.

[0013] In a second aspect, the present invention provides the following technical solution through an embodiment of the present invention:

[0014] A humidity self-regulation method for a fuel cell vehicle, applied to the humidity self-regulation system described in the first aspect above, the method comprising: obtaining a measured temperature value collected by the vehicle exterior temperature detector and a measured humidity value collected by the cabin humidity detector; and adjusting the opening of the humidity control valve based on the measured temperature value and the measured humidity value.

[0015] Preferably, controlling the opening of the humidity regulating valve based on the measured temperature value and the measured humidity value includes: determining the humidity target value of the vehicle cabin based on the measured temperature value and a preset corresponding relationship, wherein the preset corresponding relationship is the corresponding relationship between the temperature value and the humidity target value; and adjusting the opening of the humidity regulating valve based on the deviation between the humidity target value and the measured humidity value.

[0016] Preferably, before obtaining the measured temperature value collected by the outside temperature detector and the measured humidity value collected by the cabin humidity detector, it also includes: opening the air pressure regulating valve; collecting the pressure value at the pipeline between the air pressure regulating valve and the water inlet of the drainage box and the air inlet of the exhaust box to obtain a first pressure value; based on the first pressure value, adjusting the opening of the air pressure regulating valve so that the first pressure value is within a first preset pressure range; after controlling the opening of the humidity regulating valve, it also includes: obtaining the second pressure value collected by the second pressure detector; based on the second pressure value, adjusting the opening of the air pressure regulating valve so that the pressure of the mixed gas flowing out of the output port of the humidity regulating valve is within a second preset pressure range.

[0017] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0018] This invention introduces the exhaust gas generated by the vehicle's fuel cell into an intake-liquid separator to separate the exhaust gas into gas and liquid. The gas is sent to an exhaust tank, and the liquid is sent to a drain tank. The outlet of the drain tank and the exhaust port of the exhaust tank are connected to the first and second inlets of a humidity regulating valve via pipes, respectively. The outlet of the humidity regulating valve is connected to the air inlet of the air conditioning subsystem via a pipe. In other words, the liquid in the drain tank and the gas in the exhaust tank are connected to the air inlet of the air conditioning subsystem via the humidity regulating valve and pipes. The system also includes an outside temperature detector and a cabin humidity detector. The humidity controller adjusts the opening of the humidity regulating valve based on the measured temperature value collected by the outside temperature detector and the measured humidity value collected by the cabin humidity detector. This controls the mixing ratio of the liquid flowing from the drain tank and the gas flowing from the exhaust tank, allowing the mixed gas to flow into the air conditioning subsystem. The air conditioning subsystem then delivers the mixed gas into the cabin to regulate the humidity inside the cabin. This method uses the exhaust gas generated by the fuel cell as a source and adaptively adjusts the opening of the humidity control valve based on the outside temperature and the humidity inside the cabin to change the humidity of the mixed gas, thereby achieving self-regulation of the humidity inside the cabin, improving the accuracy of humidity control and maintaining the cabin humidity within a comfortable range for the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a humidity self-regulating system for a fuel cell vehicle provided in an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of another humidity self-regulating system for a fuel cell vehicle provided in an embodiment of the present invention;

[0022] Figure 3 A flow chart of a humidity self-regulation method for a fuel cell vehicle provided in an embodiment of the present invention;

[0023] Figure 4 A flowchart illustrating a humidity self-regulation method for a fuel cell vehicle, provided as an embodiment of the present invention;

[0024] Figure 5 This is a schematic flowchart of a humidity self-regulation method for a fuel cell vehicle provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The embodiments of the present application provide a humidity self-regulating system and method for a fuel cell vehicle. The system can adaptively adjust the air humidity in the vehicle cabin, improve the accuracy of humidity control, and ensure that the humidity in the cabin is continuously maintained within an appropriate range.

[0026] The overall idea of ​​the technical solution of the embodiment of this application is as follows:

[0027] A humidity self-regulating system for a fuel cell vehicle comprises: an exhaust gas mixing subsystem, a humidity regulating subsystem and an air conditioning and ventilation subsystem; the exhaust gas mixing subsystem comprises a gas-liquid separator, a drainage box and an exhaust box, the input port of the gas-liquid separator is connected to the exhaust gas output port of the fuel cell, the first output port of the gas-liquid separator is connected to the water inlet of the drainage box, and the second output port is connected to the air inlet of the exhaust box through a pipe; the humidity regulating subsystem comprises a humidity controller, a humidity regulating valve, an outside temperature detector and a cabin humidity detector, the first input port of the humidity regulating valve is connected to the water outlet of the drainage box through a pipe, and the second input port is connected to the water outlet of the drainage box through a pipe. The outlet is connected to the exhaust outlet of the exhaust box through a pipe, the output port is connected to the air inlet of the air conditioning and ventilation subsystem through a pipe, and the humidity controller is connected to the control end of the humidity regulating valve, the outside temperature detector and the cabin humidity detector respectively; the humidity controller is used to adjust the opening of the humidity regulating valve based on the measured temperature value collected by the outside temperature detector and the measured humidity value collected by the cabin humidity detector, so as to control the mixing ratio of the liquid flowing out of the drainage tank and the gas discharged from the exhaust box; the air conditioning and ventilation subsystem is used to send the mixed gas output from the output port of the humidity regulating valve into the cabin to adjust the air humidity in the cabin.

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] It should be noted that the humidity controller in this application can be: a PLC (Programmable Logic Controller) or a single-chip microcomputer, etc.

[0030] In the first aspect, an embodiment of the present invention provides a humidity self-regulating system for a fuel cell vehicle, specifically, Figure 1 As shown, the system includes: an exhaust gas mixing and exhaust subsystem, a humidity regulation subsystem and an air conditioning and air supply subsystem.

[0031] The exhaust gas mixing subsystem includes a gas-liquid separator, a drainage box and an exhaust box. The input port of the gas-liquid separator is connected to the exhaust gas output port of the fuel cell 16, the first output port of the gas-liquid separator is connected to the water inlet of the drainage box, and the second output port is connected to the air inlet of the exhaust box through a pipeline.

[0032] In a specific embodiment, the gas-liquid separator may include a first gas-liquid separator 21 and a second gas-liquid separator 22. The input port of the first gas-liquid separator 21 is connected to the hydrogen output port of the fuel cell 16, the first output port of the first gas-liquid separator 21 is connected to the water inlet of the drain tank, and the second output port is connected to the air inlet of the exhaust box through a pipe. The input port of the second gas-liquid separator 22 is connected to the air output port of the fuel cell 16, the first output port of the second gas-liquid separator 22 is connected to the water inlet of the drain tank, and the second output port is connected to the air inlet of the exhaust box through a pipe.

[0033] Specifically, the first gas-liquid separator 21 is used for treating exhaust gas from the hydrogen path. It has three interfaces: channel 1 connects to the hydrogen exhaust outlet of the fuel cell 16, channel 2 separates water from the hydrogen exhaust gas, and channel 3 separates gas from the hydrogen exhaust gas. The second gas-liquid separator 22 is used for treating exhaust gas from the air path. It also has three interfaces: channel 1 connects to the air exhaust outlet of the fuel cell 16, channel 2 separates water from the air exhaust gas, and channel 3 separates gas from the air exhaust gas.

[0034] The exhaust gas mixing subsystem includes a mixing box 23, which includes two chambers: a drain box and an exhaust box. The first output port 2 of the first gas-liquid separator 21 is connected to the first water inlet of the drain box, and the second output port 3 is connected to the first water inlet of the exhaust box. The first output port 2 of the second gas-liquid separator 22 is connected to the second water inlet of the drain box, and the second output port 3 of the second gas-liquid separator 22 is connected to the second water inlet of the exhaust box.

[0035] The humidity control subsystem includes a humidity controller 30, a humidity control valve 32, an outside temperature detector 39, and a cabin humidity detector 37. The first input port of the humidity control valve 32 is connected to the outlet of the drain tank through a pipe, the second input port is connected to the exhaust port of the exhaust box through a pipe, and the output port is connected to the air inlet of the air conditioning supply subsystem through a pipe. The humidity controller 30 is connected to the control terminal of the humidity control valve 32, the outside temperature detector 39, and the cabin humidity detector 37, respectively.

[0036] Specifically, the outlet of the drain tank is connected to the first input port 1 of the humidity regulating valve 32 through a pipe, the exhaust port of the exhaust tank is connected to the second input port 2 of the humidity regulating valve 32 through a pipe, and the outlet of the mixing tank 23 connects the drain tank and the exhaust tank to the outside air.

[0037] The external temperature detector 39 (e.g., temperature sensor, thermometer, etc.) can be installed on the outside of the vehicle, such as on the top or rear of the vehicle, to detect the temperature of the environment in which the vehicle is located. The cabin humidity sensor (e.g., humidity sensor, hygrometer, etc.) can be installed at any location inside the cabin, such as above the cabin or behind the seats, to detect the humidity value inside the vehicle cabin.

[0038] The humidity controller 30 is used to obtain the measured temperature value collected by the vehicle outside temperature detector 39 and the measured humidity value collected by the cabin humidity detector 37, and adjust the opening of the humidity regulating valve 32 based on the measured temperature value and the measured humidity value to control the mixing ratio of the liquid flowing out of the drainage tank and the gas discharged from the exhaust tank.

[0039] The air conditioning supply subsystem is used to deliver the mixed gas output from the humidity regulating valve outlet into the cabin to regulate the air humidity inside the cabin.

[0040] In a specific embodiment, the air conditioning subsystem includes a blower 41, an evaporator 42, a warm air heat exchanger 43, an air mixing damper 44, an air outlet 45, and an air conditioning air supply duct 46. The evaporator 42 is primarily used for air conditioning and cooling. It contains atomized, low-temperature, low-pressure gaseous refrigerant, which keeps the temperature around the evaporator very low. The blower 41 then delivers the cool air around the evaporator into the vehicle through the air conditioning air supply duct 46. The warm air heat exchanger 43 heats water to generate heat. The blower 41 then exchanges heat around the evaporator to generate hot air, which is then delivered into the vehicle through the air conditioning air supply duct 46. The air mixing damper 44 enables switching between cool and hot air channels.

[0041] The blower in the air conditioning supply subsystem delivers the mixed gas into the cabin to regulate the air humidity inside the cabin.

[0042] It should be noted that the humidity control subsystem also includes a purification device 33, which is connected between the humidity control valve 32 and the air inlet of the air conditioning subsystem. The purification device 33 is used to purify the mixed gas flowing out of the output end of the humidity control valve 32. The purification device 33 can remove impurities in the water and purify hydrogen and harmful gases in the gas in the pipeline. For example, the purification device 33 can be composed of a gas purification device and a multi-layer mineral filtration water purification device.

[0043] In a specific embodiment, to control the mixing ratio of liquid flowing from the drain tank and gas discharged from the exhaust box when adjusting the opening of the humidity control valve 32, the humidity control valve 32 provided in this application is configured such that when the opening is zero, the second inlet 2 and the outlet 3 of the humidity control valve 32 are connected (i.e., the exhaust box can flow through the humidity control valve 32), while the first inlet 1 and the outlet 3 are closed. By opening the humidity control valve 32 and continuously adjusting the opening of the humidity control valve 32, the water in the drain tank can be mixed as needed with the gas flowing from the second inlet 2 and the outlet 3, thereby changing the humidity of the mixed gas flowing from the outlet of the humidity control valve 32 into the air supply subsystem of the air conditioning system. Specifically, the greater the opening of the humidity control valve, the higher the humidity of the mixed gas.

[0044] In a specific embodiment, based on the measured temperature value collected by the outside vehicle temperature detector 39 and the measured humidity value collected by the cockpit humidity detector 37, adjusting the opening degree of the humidity regulating valve 32 may include: determining a humidity target value for the vehicle cockpit based on the measured temperature value and a preset corresponding relationship, where the preset corresponding relationship is the corresponding relationship between the temperature value and the humidity target value; and adjusting the opening degree of the humidity regulating valve 32 based on the deviation between the humidity target value and the measured humidity value.

[0045] Specifically, there is a corresponding relationship between the measured temperature value and the humidity target value of the vehicle cockpit, so that the humidity target value of the vehicle cockpit can be determined based on the measured temperature value. When the measured temperature value is within the first preset temperature range, the humidity target value is determined as the first target temperature; when the measured temperature value is within the second preset temperature range, the humidity target value is determined as the second target temperature; when the measured temperature value is within the third preset temperature range, the humidity target value is determined as the third target temperature.

[0046] For example: when it is detected that the measured temperature value Tamb ≤ 5°C, the humidity target value RHset is determined to be a humidity of 60 - 70%; when it is detected that the measured temperature value is in the range of 5°C < Tamb < 30°C, the humidity target value RHset is determined to be a humidity of 45 - 60%; when it is detected that the measured temperature value Tamb > 30°C, the humidity target value RHset is determined to be a humidity of 40 - 50%.

[0047] Compare the deviation between the humidity target value and the measured humidity value inside the cockpit, and adjust the opening degree of the humidity regulating valve 32 based on this deviation, so that the measured humidity value inside the cockpit is within the preset humidity range RHset. In a specific embodiment, if it is compared that the measured humidity value inside the cockpit is equal to the humidity target value (i.e., within the range of the humidity target value), the humidity regulating valve 32 is not adjusted; if it is compared that the measured humidity value inside the cockpit is less than the humidity target value, the opening degree of the humidity regulating valve 32 is increased to increase the liquid in the drainage tank mixed into the gas coming out of the exhaust tank; if it is compared that the measured humidity value inside the cockpit is greater than the humidity target value, the opening degree of the humidity regulating valve 32 is decreased to reduce the liquid in the drainage tank mixed into the gas coming out of the exhaust tank. While adjusting the humidity regulating valve 32, the humidity value inside the cockpit is obtained in real time until the humidity value collected by the cockpit humidity detector 37 is equal to the humidity target value, then the adjustment of the humidity regulating valve 32 is stopped.

[0048] Furthermore, in order to be able to control the conduction state between the tail gas outlet of the fuel cell 16 and the air conditioning air supply subsystem, the humidity regulation subsystem further includes a shut-off stop valve 34, and the shut-off stop valve 34 is arranged on the connecting pipe between the humidity regulating valve 32 and the air inlet of the air conditioning air supply subsystem.

[0049] In the initial state, the shutoff valve 34 is in the open state. As an optional embodiment, the system may further include a humidification button 38, which is connected to the control end of the shutoff valve 34 and the humidity controller 30, respectively, for controlling the opening and closing of the shutoff valve 34 and the humidity controller 30. The process of opening and closing the shutoff valve 34 may include: when the humidification button 38 is closed, the shutoff valve 34 is closed and the humidity controller 30 is opened. Then, the humidity controller 30 obtains the measured temperature value collected by the external temperature detector 39 and the measured humidity value collected by the cabin humidity detector 37, and adjusts the opening of the humidity control valve 32 based on the measured temperature and humidity values. When the humidification button 38 is turned off, the shutoff valve is disconnected and the humidity controller stops operating. The humidification button 38 may be a virtual button that the user can turn on or off through the vehicle's operating panel.

[0050] As another optional embodiment, the process of opening shutoff valve 34 may further include: connecting a control end of the shutoff valve to a humidity controller; the humidity controller 30 being configured to, upon comparison and determination that the measured humidity value in the cabin is greater than or less than a target humidity value, open shutoff valve 34, thereby allowing the mixed gas flowing out of the output port of humidity control valve 32 to flow into the air conditioning subsystem through shutoff valve 34. The humidity controller 30 is further configured to close shutoff valve 34 upon comparison and determination that the measured humidity value in the cabin is equal to the target humidity value and upon detecting that shutoff valve 34 is open.

[0051] Furthermore, in order to ensure that the liquid and gas in the mixed row box 23 can flow to the humidity control valve 32 and reach the air conditioning and air supply subsystem, the system also includes an air compressor 13, and the humidity control subsystem also includes an air pressure regulating valve 31 and a first pressure detector 311. One end of the air pressure regulating valve 31 is connected to the output end of the air compressor 13, and the other end of the air pressure regulating valve 31 is connected to the water inlet of the drainage box and the air inlet of the exhaust box through pipes. The first pressure detector 311 is set on the pipe between the air pressure regulating valve 31 and the water inlet of the drainage box and the air inlet of the exhaust box, and is used to collect the air pressure value at the pipe to obtain a first pressure value. Among them, the first pressure detector 311 can be a variety of types of pressure sensors.

[0052] The control end of the air pressure regulating valve 31 and the first pressure detector 311 are both connected to the humidity controller 30. The humidity controller 30 is used to adjust the opening of the air pressure regulating valve 31 based on the first pressure value so that the first pressure value is within a first preset pressure range.

[0053] In a specific embodiment, the system further includes an FCS air supply subsystem. The input end of the FCS air supply subsystem is used to introduce outside air, and the output end is connected to the cathode air inlet of the fuel cell 16. The air supply subsystem is used to supply air to the fuel cell stack 16. Specifically, the FCS air supply subsystem may include: a back pressure valve 17 and an air filter 11, an air flow meter 12, an air compressor 13, an intercooler 14, and a humidifier 15 connected in sequence. The input end of the air filter 11 is open to the atmosphere, the output end of the humidifier 15 is connected to the cathode air inlet of the fuel cell 16, one end of the back pressure valve 17 is connected to the air exhaust outlet, and the other end is connected to the input end of the second gas-liquid separator 22.

[0054] Specifically, atmospheric air enters through the air inlet, passes through the air filter 11, and the purification device 33 removes impurities, dust, and moisture from the air before entering the air flow meter 12. The flow meter accumulates the amount of air entering the air. The air entering the flow meter is compressed by the air compressor 13 and then flows into the intercooler 14 to cool the high-temperature, high-pressure air. After cooling, the air flows into the air humidifier 15 and then into the cathode inlet of the fuel cell 16, entering the fuel cell stack for reaction. The fuel cell 16 exits the stack and enters the exhaust gas mixing system through the back pressure valve 17. The back pressure valve 17 and the air compressor 13 are coordinated to establish the air inlet pressure. Air temperature and pressure sensors are installed at both the inlet and outlet of the fuel cell to detect the temperature and pressure of the inlet and outlet air.

[0055] One end of the air pressure regulating valve 31 is connected to the output end of the air compressor 13, and the other end is connected to both the air inlet of the drain box and the air inlet of the exhaust box. The humidity controller 30 obtains the first pressure value collected by the first pressure detector 311. The first pressure detector 311 is used to detect the air pressure value of the air outlet air entering the drain box and the exhaust box from the air compressor 13.

[0056] Specifically, the humidity controller 30 adjusts the opening of the air pressure regulating valve 31 based on a first pressure value, including: comparing the relationship between the first pressure value and a first preset pressure range; if the first pressure value is within the first preset pressure range, adjusting the air pressure regulating valve 31; if the first pressure value is less than the lowest value within the first preset pressure range, adjusting the opening of the air pressure regulating valve 31; if the first pressure value is greater than the maximum value within the first preset pressure range, decreasing the opening of the air pressure regulating valve 31, until the first pressure value is detected to be within the first preset pressure range. The first preset pressure range can be calibrated according to actual needs, and this application does not limit it.

[0057] It should be noted that before adjusting the opening of the humidity regulating valve 32, the humidity controller 30 is used to first adjust the opening of the air pressure regulating valve 31 based on the first pressure value, so that the first pressure value is within the first preset pressure range, so that the liquid and gas in the exhaust box and the drainage box have a certain pressure and can flow smoothly to the humidity regulating valve 32 and enter the air conditioning supply subsystem.

[0058] Since the exhaust gas humidity in the exhaust box is generally 95%, by adjusting the opening of the air pressure regulating valve 31, the humidity of the mixed gas in the exhaust box will be reduced after the outlet gas of the air compressor 13 is mixed into the exhaust box. Generally speaking, when the air pressure regulating valve 31 is opened to the maximum, the humidity of the mixed gas in the exhaust box can be calibrated to 65%-75% according to the volume of the drainage box.

[0059] Furthermore, in order to ensure that the mixed gas has sufficient pressure to flow to the air conditioning and ventilation subsystem and be ejected to the outside, the humidity regulation subsystem also includes: a second pressure detector 35, which is arranged between the humidity regulation valve 32 and the air inlet of the air conditioning and ventilation subsystem, and is used to collect the pressure value of the mixed gas flowing out from the output port of the humidity regulation valve 32 to obtain a second pressure value.

[0060] The control end of the second pressure detector 35 is connected to the humidity controller 30, which is used to adjust the opening of the pressure regulating valve 31 based on the second pressure value so that the pressure of the mixed gas flowing out of the output port of the humidity regulating valve 32 is within the second preset pressure range.

[0061] Specifically, when the humidity control valve 32 has a certain opening, if the humidity controller 30 compares and determines that the second pressure value is not within the second preset pressure range, the opening of the air pressure control valve 31 is adjusted so that the second pressure value is within the second preset pressure range. Specifically, if the second pressure value is equal to the lowest pressure value within the first preset pressure range, it means that the current pressure is just enough to deliver the mixed gas into the air conditioning subsystem. If the second pressure value is less than the minimum value within the first preset pressure range, it means that the current second pressure value is relatively low. The opening of the air pressure control valve 31 is adjusted until the second pressure value is within the second preset pressure range. If the second pressure value is greater than the maximum value within the first preset pressure range, it means that the current second pressure value is relatively high. The opening of the air pressure control valve 31 is then reduced.

[0062] The second preset pressure range can be determined experimentally. It should be noted that, in one scenario, the first preset pressure range can also be equal to the second preset pressure range.

[0063] As another optional embodiment, Figure 2As shown, the system also includes an air compressor 13, and the humidity control subsystem also includes: a pressure regulating valve 31, a first pressure detector 311, a second pressure detector 311, a water pump 36, and a three-way valve 29. One end of the pressure regulating valve 31 is connected to the output end of the air compressor 13, and the other end of the pressure regulating valve 31 is connected to the air inlet of the exhaust box via a pipe. The first pressure detector 311 is disposed on the pipe between the pressure regulating valve 31 and the air inlet of the exhaust box and is used to collect the air pressure value at the pipe to obtain a first pressure value. The control end of the pressure regulating valve 31 and the first pressure detector 311 are both connected to the humidity controller 30. The humidity controller 30 is used to adjust the opening of the pressure regulating valve 31 based on the first pressure value, so that the first pressure value is within a first preset pressure range. In other words, adjusting the opening of the pressure regulating valve 31 can change the pressure of the gas in the exhaust box.

[0064] The input of water pump 36 is connected to the water outlet of the drainage tank via a pipe. The output of water pump 36 is connected to the first input of three-way valve 29. The second input of three-way valve 29 is connected to the water inlet of the drainage tank. The output of three-way valve 29 is connected to the first input of humidity control valve 32. A second pressure detector 311 is disposed between humidity control valve 32 and the air inlet of the air conditioning subsystem and is used to collect the pressure of the mixed gas flowing out of the output of humidity control valve 32 to obtain a second pressure value. The control end of water pump 36 and the control end of second pressure detector 311 are connected to humidity controller 30. Humidity controller 30 is further used to adjust the opening of air pressure control valve 31 and the speed of water pump 36 based on the second pressure value, so that the pressure of the mixed gas flowing out of the output of humidity control valve 32 is within a second preset pressure range.

[0065] Specifically, the water pump 36 is mainly used to pump water from the drainage tank to the first input port 1 of the humidity regulating valve 32. The water inlet of the water pump 36 is connected to the outlet of the drainage tank through a pipe. The outlet of the water pump 36 is connected to the first input port 1 of the three-way valve 29 through a pipe. The second input port 2 of the three-way valve 29 is connected to the inlet of the drainage tank. The output port 3 of the three-way valve 29 is connected to the first input port 1 of the humidity regulating valve 32.

[0066] Specifically, based on the second pressure value, adjusting the opening of the air pressure regulating valve 31 and the speed of the water pump 36 may include: if the comparison shows that the second pressure value is less than the lowest value within the second preset pressure range, then increasing the speed of the water pump 36 and the opening of the air pressure regulating valve 31 to ensure that the pressure value of the mixed gas flowing out of the output port of the shut-off valve is within the second preset pressure range, so that the current pressure can deliver the mixed gas into the air conditioning and ventilation subsystem.

[0067] Here, a water pump 36 is used to pressurize the water flow in the drainage tank, forcing the water to the outlet of the air conditioning and air supply subsystem of the atomizer 310, replacing the method of using high-pressure, high-temperature gas from the outlet of the air compressor 13 to increase the pressure in the drainage tank. Since the high-pressure, high-temperature gas from the outlet of the air compressor 13 enters both the drainage tank and the exhaust tank simultaneously, which may cause unstable air pressure, the addition of the water pump 36 and the three-way valve 29 can effectively avoid the problems of being unable to effectively pressurize both tanks simultaneously, being unable to distribute the air pressure between the two cavities, and the air pressure sensor being able to only detect the common pressure of the two tanks and being unable to effectively detect the pressure in the two cavities separately.

[0068] Furthermore, to ensure that the amount of liquid in the drainage tank meets the humidity regulation requirements, the exhaust gas mixing subsystem also includes a water level detector 24, which is disposed within the drainage tank and is used to detect the water level in the drainage tank. The water level detector 24 is connected to a humidity controller 30, which is also used to issue a water level abnormality alert if the water level is detected to be lower than a preset water level. The preset water level can be calibrated according to actual needs and is not limited in this application. The water level detector 24 can be a water level sensor, a liquid level controller, an electronic liquid level gauge, etc.

[0069] Specifically, the humidity controller 30 can be connected to the vehicle's display panel. When the water level in the drain tank is detected to be lower than the preset water level, the display panel will show the abnormal water level information. Alternatively, the humidity controller 30 can also be connected to an alarm, which will alert the system to abnormal water levels.

[0070] Furthermore, the humidity control subsystem also includes an atomizer 310, the input port of which is connected to the output port of the humidity control valve 32, and the output port of the atomizer 310 is connected to the air inlet of the air conditioning supply subsystem through a pipe. The atomizer 310 is used to disperse the mixed gas flowing out from the humidity control valve 32 and to inject the dispersed mixed gas into the air conditioning supply subsystem.

[0071] In a specific embodiment, the atomizer 310 uses a nozzle or a high-speed airflow to disperse liquid or gas into tiny droplets and spray them out in a mist. The atomizer 310 is arranged in the air conditioning duct of the vehicle near the air outlet.

[0072] Optionally, the atomizer 310 may also be equipped with a purifier, which is mainly used to purify the water and gas in the pipeline, remove impurities from the water, and purify hydrogen and harmful gases in the gas in the pipeline.

[0073] Furthermore, to avoid uneven humidity distribution within the vehicle cabin, the use of in-vehicle air conditioning ducts to supply atomized air allows each air outlet to humidify the air, achieving uniform humidification throughout the cabin. The humidity self-regulation system requires the vehicle's air conditioning system to be turned on before activation.

[0074] Therefore, if Figure 3 As shown, the workflow of one of the humidity self-regulating systems provided in this application is as follows:

[0075] S1: Turn on the air conditioning system, press the humidification button, and start the humidity self-regulation system;

[0076] S2: Open the shut-off valve and the air pressure regulating valve to allow the high-temperature and high-pressure gas at the air compressor outlet to enter the exhaust box and the drain box;

[0077] S3: Adjust the opening of the air pressure regulating valve so that the pressure of the exhaust tank and the drain tank is within a first preset pressure range;

[0078] S4: obtaining a measured temperature value collected by an external temperature detector and a measured humidity value in the cabin, and obtaining a humidity target value based on the measured temperature value;

[0079] S5: Based on the humidity target value and the measured humidity value, adjust the opening of the humidity control valve to ensure that the cabin humidity reaches the humidity target value;

[0080] S6: When the opening of the humidity regulating valve is constant (when the opening is non-zero), adjust the opening of the air pressure regulating valve based on the pressure value collected by the second pressure detector to ensure that the pressure in front of the atomizer is within the second preset pressure range.

[0081] S7: The atomizer atomizes the mixed gas and sprays it into the air-conditioning supply duct, which is then delivered into the cabin by the blower.

[0082] like Figure 4 As shown, the workflow of another humidity self-regulating system provided by this application is as follows:

[0083] S1: Turn on the air conditioning system, press the humidification button, and start the humidity self-regulation system;

[0084] S2: Open the shut-off valve and the air pressure regulating valve to allow the high-temperature and high-pressure gas at the air compressor outlet to enter the exhaust box;

[0085] S3: Adjust the opening of the air pressure regulating valve so that the pressure of the exhaust box is within a first preset pressure range;

[0086] S4: obtaining a measured temperature value collected by an external temperature detector and a measured humidity value in the cabin, and obtaining a humidity target value based on the measured temperature value;

[0087] S5: Based on the humidity target value and the measured humidity value, adjust the opening of the humidity control valve to ensure that the cabin humidity reaches the humidity target value;

[0088] S6: When the humidity control valve opening is constant (when the opening is non-zero), the air pressure control valve opening and the water pump speed are adjusted based on the pressure value collected by the second pressure detector to ensure that the pressure before the atomizer is within a second preset pressure range;

[0089] S7: The atomizer atomizes the mixed gas and sprays it into the air-conditioning supply duct, which is then delivered into the cabin by the blower.

[0090] The humidity self-regulating system provided in the present application has the following advantages: it can adaptively adjust according to the ambient temperature and humidity, and adopt a closed-loop control strategy to maintain the cabin humidity within a comfortable range for the human body; the humidity control is performed by the system, which can avoid the errors caused by the manual control process and make the control accuracy high; the atomization effect is good, without large particles of liquid water droplets, and at the same time has the characteristics of high humidification efficiency, low noise and long life; the vehicle-mounted air-conditioning outlet duct is used to realize the supply of atomized air, and each air outlet can realize air humidification, avoiding uneven humidity distribution in the entire vehicle cabin.

[0091] Compared with the existing after-sales humidifier technology, the use of fuel cells to discharge waste water does not require external water, and there is no risk of water drying up, which has higher safety performance. It also solves the problems of limited water tank capacity and inconvenient water addition in after-sales humidifiers. The use of fuel cells to discharge waste water does not require external water, and there is a steady supply of water, which improves convenience.

[0092] In summary, the present application provides a humidity self-regulating system for fuel cell vehicles. By taking the exhaust gas generated by the fuel cell as the source, the system adaptively adjusts the opening of the humidity regulating valve based on the outside temperature and the humidity in the cabin, changes the humidity of the mixed gas, and thus realizes self-regulation of the humidity in the cabin, improves the accuracy of humidity control, and maintains the cabin humidity within a comfortable range for the human body.

[0093] In the second aspect, an embodiment of the present invention provides a humidity self-regulation method for a fuel cell vehicle. Specifically, Figure 5 As shown, the humidity self-regulation method includes the following steps S101 to S102.

[0094] Step S101, obtaining a measured temperature value collected by the vehicle exterior temperature detector and a measured humidity value collected by the cabin humidity detector;

[0095] Step S102: Based on the measured temperature value and the measured humidity value, adjust the opening of the humidity regulating valve.

[0096] The specific implementation process can refer to the corresponding description in the system embodiment provided in the first aspect above, and will not be repeated here.

[0097] In an optional embodiment, controlling the opening of the humidity control valve based on the measured temperature value and the measured humidity value includes:

[0098] determining a target humidity value for the vehicle cabin based on the measured temperature value and a preset correspondence relationship, wherein the preset correspondence relationship is a correspondence relationship between the temperature value and the target humidity value;

[0099] The opening of the humidity control valve is adjusted based on a deviation between the humidity target value and the measured humidity value.

[0100] In an optional embodiment, before obtaining the actual temperature value collected by the vehicle exterior temperature detector and the actual humidity value collected by the cabin humidity detector, the method further includes:

[0101] Open the air pressure regulating valve;

[0102] collecting pressure values ​​at the pipeline between the air pressure regulating valve and the water inlet of the drainage box and the air inlet of the exhaust box to obtain a first pressure value;

[0103] Based on the first pressure value, adjusting the opening of the air pressure regulating valve so that the first pressure value is within a first preset pressure range;

[0104] After controlling the opening of the humidity control valve, the method further includes:

[0105] Obtaining a second pressure value collected by a second pressure detector;

[0106] Based on the second pressure value, the opening of the air pressure regulating valve is adjusted so that the pressure of the mixed gas flowing out of the output port of the humidity regulating valve is within a second preset pressure range.

[0107] An embodiment of the present invention provides a humidity self-regulation method for a fuel cell vehicle, the implementation principle and technical effects of which are the same as those of the aforementioned system embodiment. For the sake of brief description, for matters not mentioned in the method embodiment, reference may be made to the corresponding content in the aforementioned system embodiment.

[0108] 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.

[0109] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts 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, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A module that specifies functions in one or more boxes.

[0110] 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 modules implemented in a process. Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0111] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0112] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0113] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A humidity self-regulating system for a fuel cell vehicle, characterized in that: include: Exhaust gas mixing and exhaust subsystem, humidity regulation subsystem and air conditioning and air supply subsystem; The exhaust gas mixing and exhaust subsystem includes a gas-liquid separator, a drainage box and an exhaust box, the input port of the gas-liquid separator is connected to the exhaust gas output port of the fuel cell, the first output port of the gas-liquid separator is connected to the water inlet of the drainage box, and the second output port is connected to the air inlet of the exhaust box through a pipeline; The humidity adjustment subsystem includes a humidity controller, a humidity adjustment valve, an outside temperature detector and a cabin humidity detector. The first input port of the humidity adjustment valve is connected to the water outlet of the drainage box through a pipeline, the second input port is connected to the exhaust port of the exhaust box through a pipeline, and the output port is connected to the air inlet of the air conditioning subsystem through a pipeline. The humidity controller is connected to the control end of the humidity adjustment valve, the outside temperature detector and the cabin humidity detector respectively. The humidity controller is used to adjust the opening of the humidity regulating valve based on the measured temperature value collected by the vehicle exterior temperature detector and the measured humidity value collected by the cabin humidity detector to control the mixing ratio of the liquid flowing out of the drainage box and the gas discharged from the exhaust box; The air conditioning air supply subsystem is used to deliver the mixed gas output from the output port of the humidity regulating valve into the cabin to adjust the air humidity in the cabin.

2. The system according to claim 1, characterized in that The humidity regulating subsystem further comprises: a shut-off stop valve, which is arranged on a connecting pipe between the humidity regulating valve and an air inlet of the air-conditioning air supply subsystem.

3. The system according to claim 1, characterized in that The system further includes an air compressor, and the humidity regulating subsystem further includes: an air pressure regulating valve and a first pressure detector; One end of the air pressure regulating valve is connected to the output end of the air compressor, and the other end of the air pressure regulating valve is respectively connected to the water inlet of the drainage box and the air inlet of the exhaust box through pipelines, and the first pressure detector is arranged on the pipeline between the air pressure regulating valve and the water inlet of the drainage box and the air inlet of the exhaust box, and is used to collect the air pressure value at the pipeline to obtain a first pressure value; The control end of the air pressure regulating valve and the first pressure detector are both connected to the humidity controller, and the humidity controller is used to adjust the opening of the air pressure regulating valve based on the first pressure value so that the first pressure value is within a first preset pressure range.

4. The system according to claim 3, characterized in that The humidity regulating subsystem further includes: a second pressure detector, which is arranged between the humidity regulating valve and the air inlet of the air conditioning air supply subsystem, and is used to collect the pressure value of the mixed gas flowing out of the output port of the humidity regulating valve to obtain a second pressure value; The control end of the second pressure detector is connected to the humidity controller, and the humidity controller is used to adjust the opening of the air pressure regulating valve based on the second pressure value so that the pressure of the mixed gas flowing out of the output port of the humidity regulating valve is within a second preset pressure range.

5. The system according to claim 1, wherein: The system further includes an air compressor, and the humidity regulating subsystem further includes: an air pressure regulating valve, a first pressure detector, a second pressure detector, a water pump and a three-way valve; One end of the air pressure regulating valve is connected to the output end of the air compressor, and the other end of the air pressure regulating valve is communicated with the air inlet of the exhaust box through a pipeline. The first pressure detector is arranged on the pipeline between the air pressure regulating valve and the air inlet of the exhaust box, and is used to collect the air pressure value at the pipeline to obtain a first pressure value; The control end of the air pressure regulating valve and the first pressure detector are both connected to the humidity controller, and the humidity controller is used to adjust the opening of the air pressure regulating valve based on the first pressure value so that the first pressure value is within a first preset pressure range; The input end of the water pump is communicated with the water outlet of the drainage box through a pipeline, the output end of the water pump is communicated with the first input port of the three-way valve, the second input port of the three-way valve is communicated with the water inlet of the drainage box, the output port of the three-way valve is communicated with the first input port of the humidity regulating valve, and the second pressure detector is arranged between the humidity regulating valve and the air inlet of the air-conditioning air supply subsystem, and is used to collect the pressure value of the mixed gas flowing out of the output port of the humidity regulating valve to obtain a second pressure value; The control end of the water pump and the control end of the second pressure detector are connected to the humidity controller, and the humidity controller is also used to adjust the opening of the air pressure regulating valve and the speed of the water pump based on the second pressure value, so that the pressure of the mixed gas flowing out of the output port of the humidity regulating valve is within a second preset pressure range.

6. The system according to claim 1, characterized in that The exhaust gas mixing and exhaust subsystem further includes: a water level detector, which is arranged in the drainage box and is used to detect the water level of the drainage box; The water level detector is connected to the humidity controller, and the humidity controller is further used to issue a water level abnormality reminder if it is detected that the water level is lower than a preset water level height.

7. The system according to claim 1, characterized in that The humidity regulating subsystem also includes: an atomizer, the input port of the atomizer is connected to the output port of the humidity regulating valve, the output port of the atomizer is connected to the air inlet of the air conditioning and air supply subsystem through a pipeline, and the atomizer is used to disperse the mixed gas flowing out of the humidity regulating valve and inject the dispersed mixed gas into the air conditioning and air supply subsystem.

8. A self-regulating method for a fuel cell vehicle, characterized in that: Applied to the humidity self-regulating system according to any one of claims 1 to 7, the method comprises: Acquiring a measured temperature value collected by the vehicle exterior temperature detector and a measured humidity value collected by the cabin humidity detector; Based on the measured temperature value and the measured humidity value, the opening of the humidity control valve is adjusted.

9. The method according to claim 8, characterized in that The controlling the opening of the humidity regulating valve based on the measured temperature value and the measured humidity value comprises: Determining a target humidity value for the vehicle cabin based on the measured temperature value and a preset corresponding relationship, wherein the preset corresponding relationship is a corresponding relationship between the temperature value and the target humidity value; The opening of the humidity control valve is adjusted based on the deviation between the humidity target value and the measured humidity value.

10. The method according to claim 8, characterized in that Before obtaining the actual temperature value collected by the vehicle exterior temperature detector and the actual humidity value collected by the cabin humidity detector, the method further includes: Open the air pressure regulating valve; Collecting the pressure value of the pipeline between the air pressure regulating valve and the water inlet of the drainage box and the air inlet of the exhaust box to obtain a first pressure value; Based on the first pressure value, adjusting the opening of the air pressure regulating valve so that the first pressure value is within a first preset pressure range; After controlling the opening of the humidity regulating valve, the method further includes: Obtaining a second pressure value collected by a second pressure detector, wherein the second pressure detector is disposed between the humidity regulating valve and an air inlet of the air supply subsystem of the air conditioning system, and is used to collect a pressure value of the mixed gas flowing out of an output port of the humidity regulating valve to obtain the second pressure value; Based on the second pressure value, the opening of the air pressure regulating valve is adjusted so that the pressure of the mixed gas flowing out of the output port of the humidity regulating valve is within a second preset pressure range.

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