An intelligent pressure regulating device and control method for an inflatable membrane

Abstract

The invention discloses an intelligent pressure regulating device and control method for an inflatable membrane, belonging to the technical field of inflatable membrane buildings. In the specific technical scheme, the device comprises a pressure fan, a thermal fan which takes into account temperature regulation in the inflatable membrane, a first air inlet for the pressure fan, a second air inlet for the thermal fan, an exhaust valve capable of adjusting flow rate, a sensor for detecting various environmental factors, a safety valve, an exhaust port and a controller for controlling the system. The controller is connected with the thermal fan, the pressure fan, various sensors for detecting environmental factors, the safety valve and the exhaust valve and controls them. When the internal and external environments change, the controller controls whether the temperature in the inflatable membrane needs to be adjusted through the signal obtained by the sensor, and then controls the operation of the thermal fan and the pressure fan to adjust the pressure in the inflatable membrane. At the same time, the controller can change the air supply direction of the fan according to the external wind direction, so that the wind force of the fan and the external wind force are offset, thereby preventing the depression of the air membrane caused by the external wind force.

Description

Technical Field

[0001] The present invention belongs to the technical field of inflatable membrane buildings, and particularly relates to an intelligent air pressure regulating device and a control method for an inflatable membrane. Background Art

[0002] An air-supported membrane building is a building structure system that uses building membrane materials made of polymer materials as the outer shell, and is equipped with a set of intelligent mechanical and electrical equipment to provide positive pressure air inside the air-supported membrane building to support the main body of the building. The air-supported membrane building has the characteristics of low cost, energy conservation and environmental protection, large span, and flexible and fast construction method, and can be used to build large buildings such as stadiums, industrial factories, and warehouses. Due to the characteristics of the air-supported membrane building, it is necessary to be equipped with an intelligent air pressure regulating device to maintain the air pressure inside the air-supported membrane building at a set pressure value through the intelligent air pressure regulating device. In addition, the air-supported membrane building also needs to consider the air quality and temperature inside the building to ensure the comfort, health and safety of the people inside the building. Therefore, the air-supported membrane building also needs to be equipped with corresponding air-conditioning devices and fan devices to achieve temperature regulation and air circulation inside the building. In addition, the current air-supported membrane buildings are easily affected by external winds. When the external wind is strong, the external wind will cause the depression and deformation of the inflatable membrane, affecting the stability of the overall building. Summary of the Invention

[0003] In order to solve the technical problems existing in the prior art, the present invention provides an intelligent air pressure regulating device for an inflatable membrane and its control method. The system can realize the intelligent regulation function of the air pressure inside the air-supported membrane building, maintain the air pressure inside the inflatable membrane stable at a preset pressure value, and can also intelligently regulate the temperature inside the inflatable membrane, and the air inside the inflatable membrane circulates, ensuring the air quality inside the building.

[0004] To achieve the above object, the technical solution adopted by the present invention is: an intelligent air pressure regulating device for an inflatable membrane, including a first air inlet, and the first air inlet passage is a gas passage connecting the first air inlet and the inside of the inflatable membrane. A pressure fan for supplying air to the inside of the inflatable membrane is arranged in the first air inlet, and the pressure fan is used to supply wind power to the air-supported membrane building to maintain the pressure inside the air-supported membrane. The gear change of the pressure fan is based on the pressure set value, and the gear of the regulator is adjusted to change the rotation speed of the pressure fan, so that the pressure inside the inflatable membrane is maintained within the pressure set range.

[0005] This pressure regulating device includes a second air inlet, and the second air inlet passage is a gas passage connecting the second air inlet and the inside of the inflatable membrane. A thermal fan for supplying air to the inside of the inflatable membrane is arranged in the second air inlet. Through the thermal fan, not only can wind power be supplied to the air-supported membrane building, but also the temperature inside the air-supported membrane building can be adjusted. The air-conditioning device for adjusting the temperature inside the inflatable membrane is provided by the thermal fan.

[0006] This pressure regulating device includes an air outlet that connects the inside of the inflatable membrane to the outside air, and discharges the gas inside the air-supported structure through the air outlet. An exhaust valve for regulating the air flow size of the air outlet is arranged inside the air outlet, and the opening and closing of the air outlet are controlled by the exhaust valve.

[0007] This pressure regulating device includes a return air passage that connects the inside of the inflatable membrane to the outside air. A safety valve for regulating the air flow size of the return air passage is arranged in the return air passage. The return air passage connects the second air inlet and the air outlet, and is used to return the air flow from the air outlet to the second air inlet.

[0008] A carbon dioxide sensor, a temperature sensor, and a differential pressure sensor are arranged inside the inflatable membrane. Temperature sensors, a wind sensor, and a snow load sensor are also arranged outside the inflatable membrane.

[0009] A controller for controlling the operation of the pressure blower, the thermal blower, the safety valve, the exhaust valve, the carbon dioxide sensor, the temperature sensor, the differential pressure sensor, the wind sensor, and the snow load sensor is arranged inside the inflatable membrane. The controller controls the operation of the thermal blower and the pressure blower, and adjusts the valve opening flow rates of the safety valve and the exhaust valve to adjust the internal pressure and temperature of the inflatable membrane.

[0010] The carbon dioxide sensor is used to monitor the carbon dioxide concentration inside the inflatable membrane. The temperature sensor is used to monitor the internal and external temperatures of the inflatable membrane. The differential pressure sensor is used to monitor the difference between the internal pressure and the external pressure of the inflatable membrane. The wind sensor is used to monitor the wind speed outside the inflatable membrane. The snow load sensor is used to monitor the snow load value of the inflatable membrane. According to the control signals monitored by each sensor, the controller determines whether to adjust the temperature to control the operating state of the thermal blower, and determines whether to adjust the pressure to control the operating state of the pressure blower. If a signal is obtained and the temperature needs to be adjusted, the pressure blower is turned off, the thermal blower is in the operating state, and the safety valve is opened. While adjusting the internal pressure of the inflatable membrane, the internal temperature of the inflatable membrane can also be adjusted. The opened safety valve allows some gas to flow back and enter the inflatable membrane again, playing a role in energy conservation and environmental protection.

[0011] If the controller determines that only the pressure inside the inflatable membrane needs to be adjusted and the temperature inside the inflatable membrane does not need to be adjusted, the pressure blower operates and the thermal blower is turned off.

[0012] If the controller determines that only the temperature inside the inflatable membrane needs to be adjusted and the pressure inside the inflatable membrane does not need to be adjusted, the pressure blower is turned off and the thermal blower operates.

[0013] When adjusting the temperature, the pressure blower is turned off, the thermal blower is in the operating state, and the safety valve is opened. While adjusting the internal pressure of the inflatable membrane, the internal temperature of the inflatable membrane can also be adjusted. The opened safety valve allows some gas to flow back and enter the inflatable membrane again.

[0014] Based on the measurement data of the wind sensor and the differential pressure sensor, control the operation of the pressure blower and the thermal blower, adjust the pressure balance between the inside and outside of the inflatable membrane, and prevent the deformation of the membrane caused by external wind force.

[0015] The controller determines whether it is necessary to change the air in the inflatable membrane based on at least one of the following factors: the temperature inside / outside the inflatable membrane, the carbon dioxide concentration inside the inflatable membrane, the pressure inside / outside the inflatable membrane, the magnitude of the external wind force on the inflatable membrane, and the snow accumulation situation.

[0016] The controller adjusts the gear position of the working state of the pressure blower according to the pressure set value to change the rotational speed of the pressure blower and ensure that the pressure inside the inflatable membrane remains at the pressure set value.

[0017] The pressure set value changes according to at least one of the following factors: the magnitude of the external wind force on the inflatable membrane, the snow accumulation situation, and the pressure magnitude.

[0018] When the pressure blower operates in the highest gear mode, it sends air into the inflatable membrane through the first air inlet. When the pressure inside the inflatable membrane reaches the set value, and when the pressure inside the inflatable membrane exceeds the set value, the exhaust valve opens, and the gas inside the inflatable membrane is discharged through the exhaust valve to the exhaust outlet.

[0019] When the pressure blower is in the low - gear exhaust mode, the thermal blower is in the closed state, the exhaust valve is open, the gas inside the inflatable membrane is discharged through the exhaust valve to the exhaust outlet, the safety valve is opened, and the pressure inside the inflatable membrane is adjusted by controlling the flow rate of the exhaust valve and the opening degree of the safety valve.

[0020] The controller controls the opening flow rate of the exhaust valve to adjust the pressure inside the inflatable membrane.

[0021] When the pressure inside the inflatable membrane is lower than the lower limit value of the safety pressure, or when the rate of decrease of the pressure inside the inflatable membrane is greater than the threshold value of the safety speed, or when the emergency door is opened, or when other doors of the inflatable membrane are opened under abnormal conditions, if the pressure blower is operating in the highest gear mode, close the exhaust valve, open the thermal blower, open the safety valve, and raise the pressure inside the inflatable membrane to the safe pressure range.

[0022] When the pressure inside the inflatable membrane is greater than the safety pressure set value, automatically turn off the pressure blower, turn on the thermal blower in the low gear, close the safety valve through the controller, open the exhaust valve for exhaust until the pressure inside the inflatable membrane drops to the safe pressure range.

[0023] The pressure set range changes according to at least one of the following factors: the wind force and snow accumulation conditions of the external environment, and the carbon dioxide content, temperature value, and pressure value inside the inflatable membrane.

[0024] When the pressure value of the inflatable membrane is within the set pressure range and the temperature value of the inflatable membrane is within the temperature range, when the pressure blower is in the closed state, the thermal blower is in the low gear working mode, the safety valve is opened, and the exhaust valve is opened with a small flow rate to maintain the constant pressure and temperature inside the inflatable membrane.

[0025] The present invention is also provided with an air conditioning device to adjust the temperature and humidity inside the inflatable membrane.

[0026] Compared with the prior art, the specific beneficial effects of the present invention are as follows: By arranging an intelligent adjustment device inside the inflatable membrane, when the internal and external environments of the inflatable membrane change, the controller intelligently adjusts the temperature and pressure inside the inflatable membrane through the signals obtained by the sensors to maintain the air quality, temperature, and humidity inside the inflatable membrane, so as to ensure the comfort, health, and safety of the personnel inside the building. At the same time, the controller can change the air supply direction of the blower according to the external wind direction, so that the wind force of the blower cancels out the external wind force, preventing the inflatable membrane from being dented and deformed by the external wind force. Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the intelligent pressure regulating device of the present invention.

[0028] Figure 2 It is a schematic flow diagram of the intelligent pressure regulating control method of the present invention.

[0029] Figure 3 It is a schematic structural diagram of the inflatable membrane.

[0030] Figure 4 It is a layout diagram of the inflatable membrane ventilation system.

[0031] In the figure, 1 is the inflatable membrane, 2 is the pressure blower, 3 is the thermal blower, 4 is the ventilation duct, and 5 is the baffle. Detailed Embodiments

[0032] In order to make the technical problems, technical solutions, and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] As Figure 1 shown, the inflatable membrane intelligent pressure regulating device includes a controller, a pressure blower 2, a thermal blower 3, a first air inlet, a second air inlet, an air outlet, an exhaust valve, a safety valve, a carbon dioxide concentration sensor, a temperature sensor, a differential pressure sensor, a wind force sensor, and a snow accumulation sensor.

[0034] The controller is an industrial PLC device, which consists of functional units such as a CPU, instruction and data memory, input and output interfaces, a power supply, and an A / D converter. The A / D converter converts the current signals transmitted by each sensor into digital signals. After being calculated and processed by the CPU, control operations are performed on each device.

[0035] The pressure blower 2 is a device for supplying air inside the inflatable membrane 1 to maintain the stable pressure inside the inflatable membrane 1. The pressure blower 2 is connected between the first air inlet and the inflatable membrane 1, and sends external gas from the first air inlet into the inflatable membrane 1 via the ventilation duct 4. The pressure blower 2 is a blower with a frequency converter that can control the wind force.

[0036] The thermal blower 3 is a device for supplying air inside the inflatable membrane 1 and regulating the temperature inside the air membrane. The thermal blower 3 is connected between the second air inlet and the inflatable membrane 1, and sends external gas from the second air inlet into the inflatable membrane 1 via the ventilation duct 4. When the temperature inside the inflatable membrane 1 is within the human comfort range, the thermal blower 3 stops working, and the pressure blower 2 supplies air to the inflatable membrane 1 to maintain the stable pressure inside the air membrane. When the temperature inside the inflatable membrane 1 exceeds the human comfort temperature range, the pressure blower 2 stops working, and the thermal blower 3 is turned on to regulate the temperature inside the inflatable membrane 1 and also functions as the pressure blower 2 to supply air inside the inflatable membrane 1 to maintain pressure stability. The thermal blower 3 can both refrigerate and heat, and can meet the temperature regulation requirements inside the inflatable membrane 1.

[0037] The exhaust valve is a regulating valve that can adjust the size of the ventilation duct 4. The exhaust valve is connected between the exhaust port and the inflatable membrane 1. The controller adjusts the size of the exhaust valve according to the air pressure inside the inflatable membrane 1 to control the discharge rate of the gas inside the inflatable membrane 1. In addition, whether the exhaust valve is opened to ventilate the inside of the inflatable membrane 1 needs to be judged according to the temperature and carbon dioxide concentration parameters inside the inflatable membrane 1, that is, the controller controls whether the exhaust valve is opened through the real-time parameters of the temperature sensor and the carbon dioxide concentration sensor. For example, when the temperature sensor detects that the temperature inside the inflatable membrane 1 exceeds the preset temperature range, the controller controls the opening of the exhaust valve to ventilate the inside of the inflatable membrane 1 to achieve the effect of temperature regulation. When the carbon dioxide concentration sensor detects that the carbon dioxide concentration inside the inflatable membrane 1 exceeds the maximum allowable value, the controller controls the opening of the exhaust valve to ventilate the inflatable membrane 1 to reduce the carbon dioxide concentration inside the inflatable membrane 1.

[0038] The safety valve is connected between the ventilation duct 4 of the second air inlet and the exhaust port. The controller controls the opening and closing of the safety valve to enable the gas in the exhaust port pipeline to flow back into the inflatable membrane 1 through the second air inlet pipeline. By controlling the opening of the safety valve by the controller, the power consumption of the thermal blower 3 can be reduced, achieving the purpose of energy saving.

[0039] In specific implementation, the safety valve is used in cooperation with the thermal fan 3. When the temperature and carbon dioxide concentration in the inflatable film 1 are within the normal range, the inflatable film 1 does not need air change at this time. The controller controls the safety valve to open and the exhaust valve to close, and the gas in the exhaust port pipeline flows back to the inflatable film 1 through the second air inlet pipeline, realizing the gas circulation in the inflatable film 1 and reducing the loss of the thermal fan 3.

[0040] As Figure 2 shown, the main process of intelligent voltage regulation of the controller is described.

[0041] First, the controller monitors the temperature inside the inflatable film 1 through the temperature sensor. If the temperature is within the preset temperature range, only the pressure fan 2 is turned on to send air into the inflatable film 1 to maintain the internal pressure of the inflatable film 1; if the temperature exceeds the preset temperature range, the pressure fan 2 is turned off and the thermal fan 3 is turned on to send air into the inflatable film 1 and adjust the temperature inside the inflatable film 1.

[0042] Among them, when the pressure fan 2 or the thermal fan 3 is turned on, the controller adjusts the power of the pressure fan 2 or the thermal fan 3 according to the preset pressure value, so as to ensure that the air pressure in the inflatable film 1 is maintained at the preset pressure value. Among them, the size of the preset pressure value is adjusted according to parameters such as the wind force, snow volume, and internal and external pressure difference outside the inflatable film 1.

[0043] For example, when the wind sensor monitors that the wind force outside the inflatable film 1 exceeds the preset value, the preset pressure value of the inflatable film 1 will increase. The controller, according to the change of the preset pressure value, increases the power of the pressure fan 2 or the thermal fan 3 to increase the air supply volume of the fan, so that the internal air pressure of the inflatable film 1 reaches the preset pressure value. When the snow load sensor detects that the snow load value outside the inflatable film 1 exceeds the preset snow load value, the controller increases the power of the pressure fan 2 or the thermal fan 3 to increase the air supply volume of the fan, so that the internal air pressure of the inflatable film 1 reaches the preset value.

[0044] As Figure 3 shown, the wind direction of the external wind force is detected by the wind sensor and transmitted to the controller. The controller can change the wind direction of the fan blowing air by adjusting the angle of the baffle 5 at the air outlet, so as to cancel out the external wind force and achieve the effect of preventing the inflatable film 1 from deforming and sagging. Among them, the air outlets are arranged on both sides inside the inflatable film 1 and there are multiple air outlets, and air is supplied through the air supply pipeline connected underground. When the external wind force blows towards the inflatable film 1 from the relative direction of the wind force, the air outlets on the other side will supply air through the ventilation pipeline 4, and the working mode is the same as above.

[0045] As Figure 4As shown, the pressure blower 2 sends air into the inflatable membrane 1 through the annular ventilation duct 4. At regular intervals above the ventilation duct 4, there are baffles 5 with adjustable angles, which can adjust the direction of the air supply to offset the influence of the external wind force on the inflatable membrane 1 and prevent the depression and deformation of the inflatable membrane 1.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of the present invention.

Claims

1. A control method for an intelligent pressure regulating device of an inflatable membrane, characterized in that, It includes a first air inlet connecting the inside and outside of the inflatable membrane, and a pressure blower for supplying air to the inside of the inflatable membrane is arranged in the first air inlet; It includes a second air inlet connecting the inside and outside of the inflatable membrane, and a thermal blower for supplying air to the inside of the inflatable membrane is arranged in the second air inlet; It includes an air outlet connecting the inside and outside of the inflatable membrane, and an exhaust valve for adjusting the air flow size of the air outlet is arranged in the air outlet; It includes a return air passage connecting the inside and outside of the inflatable membrane, and a safety valve for adjusting the air flow size of the return air passage is arranged in the return air passage. The return air passage connects the second air inlet and the air outlet; A carbon dioxide sensor, a temperature sensor and a differential pressure sensor are arranged inside the inflatable membrane, and temperature sensors, a wind sensor and a snow accumulation sensor are also arranged outside the inflatable membrane; A controller for controlling the operation of the pressure blower, the thermal blower, the safety valve, the exhaust valve, the carbon dioxide sensor, the temperature sensor, the differential pressure sensor, the wind sensor and the snow accumulation sensor is arranged inside the inflatable membrane. The controller controls the operation of the thermal blower and the pressure blower, and adjusts the valve opening flow size of the safety valve and the exhaust valve to adjust the internal pressure and temperature of the inflatable membrane; The carbon dioxide sensor is used to monitor the carbon dioxide concentration inside the inflatable membrane, the temperature sensor is used to monitor the internal and external temperatures of the inflatable membrane, the differential pressure sensor is used to monitor the difference between the internal pressure and the external pressure of the inflatable membrane, the wind sensor is used to monitor the wind force outside the inflatable membrane, and the snow accumulation sensor is used to monitor the snow accumulation amount of the inflatable membrane. According to the control signals monitored by each sensor, the controller judges whether it is necessary to adjust the temperature to control the working state of the thermal blower, and the controller judges whether it is necessary to adjust the pressure to control the working state of the pressure blower; If the controller judges that only the pressure inside the inflatable membrane needs to be adjusted and the temperature inside the inflatable membrane does not need to be adjusted, the pressure blower works and the thermal blower shuts down; If the controller judges that only the temperature inside the inflatable membrane needs to be adjusted and the pressure inside the inflatable membrane does not need to be adjusted, the pressure blower shuts down and the thermal blower works; According to the measurement data of the wind sensor and the differential pressure sensor, control the wind direction of the pressure blower to be opposite to the wind direction of the external wind force, so that the wind forces inside and outside the inflatable membrane cancel each other out, and adjust the balance between the internal pressure of the inflatable membrane and the external pressure of the inflatable membrane.

2. The control method for an intelligent pressure regulating device of an inflatable membrane according to claim 1, characterized in that, The controller judges whether it is necessary to change the air in the inflatable membrane according to at least one of the factors such as the internal / external temperature of the inflatable membrane, the carbon dioxide concentration inside the inflatable membrane, the internal / external pressure of the inflatable membrane, the wind force outside the inflatable membrane, and the snow accumulation situation; The controller adjusts the gear level of the working state of the pressure blower according to the pressure set value to change the rotation speed of the pressure blower, so as to ensure that the internal pressure of the inflatable membrane maintains the pressure set value; The pressure set value changes according to at least one of the factors such as the wind force outside the inflatable membrane, the snow accumulation situation, and the pressure magnitude; When the pressure blower works in the highest gear mode, it supplies air to the inside of the inflatable membrane through the first air inlet until the internal pressure of the inflatable membrane reaches the set value. When the internal pressure of the inflatable membrane exceeds the set value, the exhaust valve opens, and the gas inside the inflatable membrane is discharged through the exhaust valve to the air outlet; In the low - gear exhaust mode of the pressure blower, the thermal blower is in the closed state, the exhaust valve is opened, and the gas inside the inflatable membrane is discharged through the exhaust valve to the air outlet. The safety valve is opened, and by controlling the flow rate of the exhaust valve and the opening degree of the safety valve, the pressure inside the inflatable membrane is adjusted; When adjusting the temperature, the pressure blower is closed, the thermal blower is in the working state, the safety valve is opened. While adjusting the pressure inside the inflatable membrane, the temperature inside the inflatable membrane can also be adjusted. The opened safety valve allows the gas to flow back and re - enter the inflatable membrane; The opening flow rate of the exhaust valve is controlled by the controller to adjust the pressure inside the inflatable membrane.

3. The control method for an intelligent pressure regulating device of an inflatable membrane according to claim 2, characterized in that, When the pressure inside the inflatable membrane is lower than the lower limit value of the safety pressure, or when the reduction speed of the pressure inside the inflatable membrane is greater than the threshold value of the safety speed, or when the emergency door is opened, or when other doors of the inflatable membrane are opened under abnormal conditions, if the pressure blower is operating in the highest - gear mode, the exhaust valve is closed, the thermal blower is opened, and the safety valve is opened to raise the pressure inside the inflatable membrane to the safety pressure range.

4. The control method for an intelligent pressure regulating device of an inflatable membrane according to claim 3, characterized in that, When the pressure inside the inflatable membrane is greater than the set value of the safety pressure, the pressure blower is automatically closed, the thermal blower is started in the low - gear, the safety valve is closed by the controller, and the exhaust valve is opened for exhaust until the pressure inside the inflatable membrane drops to the safety pressure range.

5. The control method for an intelligent pressure regulating device of an inflatable membrane according to claim 4, characterized in that, The set pressure range changes according to at least one of the factors such as the wind force, snow accumulation condition in the external environment, carbon dioxide content, temperature value, and pressure value inside the inflatable membrane.

6. The control method for an intelligent pressure regulating device of an inflatable membrane according to claim 5, characterized in that, When the pressure value of the inflatable membrane is within the set pressure range and the temperature value of the inflatable membrane is within the temperature range, when the pressure blower is in the closed state, the thermal blower is in the low - gear working mode, the safety valve is opened, and the exhaust valve is opened with a small flow rate to maintain the pressure and temperature inside the inflatable membrane constant.

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