Noise reduction intermittent pneumatic pulse equipment and noise reduction control method thereof

Abstract

The invention discloses a noise reduction intermittent pneumatic pulse device and a noise reduction control method thereof.The noise reduction intermittent pneumatic pulse device comprises an adjustable air pump, an air tank, a three-way connector, an electromagnetic valve set, an air bag, an air pressure sensor, an air path control system and a main control system, and the air inlet end and the air outlet end of the adjustable air pump are connected with a silencer and the air tank through pipelines respectively; the air outlet end of the air tank is connected with the first end of the three-way connector through a pipeline provided with a one-way valve, the second end of the three-way connector is connected with the air pressure sensor through a pipeline, the third end of the three-way connector is connected with the electromagnetic valve set, and the output end of the electromagnetic valve set is connected with the air bag through a pipeline. The air bag type is identified and the air path control system is driven to work; the air path control system is connected with the adjustable air pump, the air pressure sensor and the electromagnetic valve set so as to control speed regulation output of the adjustable air pump and control starting and stopping of the adjustable air pump.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a noise-reducing intermittent pneumatic pulse device and a noise-reduction control method thereof. Background Art

[0002] Deep vein thrombosis is a venous reflux disorder caused by abnormal coagulation of blood in the deep veins. It often occurs in the lower limbs, and its incidence rate is increasing year by year. Nowadays, mechanical pneumatic compression devices are mostly used as the main tool for clinical prevention of thrombosis.

[0003] The air pump is one of the important components of the intermittent pneumatic pulse equipment and the air source of the intermittent pneumatic pulse equipment. It will generate vibration and noise during operation. The noise is mainly manifested in the form of sound waves with large fluctuations in flow output, which has a great impact on the air pressure sampling and output stability performance. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a noise-reducing intermittent pneumatic pulse device and a noise reduction control method thereof, so as to reduce the noise generated during the working process of the noise-reducing intermittent pneumatic pulse device.

[0005] In the first aspect, the present invention provides a noise-reducing intermittent pneumatic pulse device, including an adjustable air pump, an air tank, a three-way joint, a solenoid valve group, an air bag, an air pressure sensor, an air circuit control system and a main control system, wherein the air inlet end of the adjustable air pump is connected to the muffler through a pipeline, the air outlet end of the adjustable air pump is connected to the air tank through a pipeline, the air outlet end of the air tank is connected to the first end of the three-way joint through a pipeline provided with a one-way valve, the second end of the three-way joint is connected to the air pressure sensor through a pipeline, the third end of the three-way joint is connected to the solenoid valve group, and the output end of the solenoid valve group is connected to the air pressure sensor through a pipeline. The airbag is connected to the airbag through a pipeline to inflate the airbag. The main control system is respectively connected to the air path control system and the airbag, and is used to identify the type of airbag and drive the air path control system to work according to the identified airbag type; the air path control system is respectively connected to the adjustable air pump, the air pressure sensor and the solenoid valve group, and is used to obtain the required air pressure parameters of the corresponding airbag according to the preset required air pressure parameters of different airbags combined with the identified airbag type, and control the speed regulation output of the adjustable air pump; and is used to control the start and stop of the adjustable air pump according to the air pressure parameters detected by the air pressure sensor.

[0006] In a second aspect, the present invention also provides a noise reduction control method for a noise reduction intermittent pneumatic pulse device, comprising the following steps: identifying the airbag type of the airbag in the noise reduction intermittent pneumatic pulse device; obtaining the required air pressure parameters of the corresponding airbag according to the preset required air pressure parameters of different airbags in combination with the identified airbag type; obtaining the voltage value of the power supply required for the operation of the adjustable air pump corresponding to the preset different airbags in combination with the identified airbag type, calculating and obtaining the corresponding air pump control signal and outputting it, and controlling the operation of the solenoid valve group; making a start and stop judgment on the adjustable air pump according to the required air pressure parameters of the corresponding airbag in combination with the air pressure parameters detected by the air pressure sensor, and controlling the start and stop of the adjustable air pump according to the judgment result.

[0007] The beneficial technical effect of the present invention is that: the noise reduction intermittent pneumatic pulse device of the present invention connects a muffler to the air inlet end of the adjustable air pump, and connects one end of the air tank with a one-way valve at the other end to the air outlet end of the adjustable air pump to offset the noise passively generated by the inhaled airflow when the adjustable air pump is working, thereby reducing the noise and vibration caused by the equipment when working; at the same time, by setting a main control system connected to the air path control system and the airbag, the airbag type is identified and the air path control system is driven to work according to the identified airbag type, and the air path control system is connected to the adjustable air pump, the air pressure sensor and the solenoid valve group, so that the required air pressure parameters of the corresponding airbag can be obtained according to the preset required air pressure parameters of different airbags combined with the identified airbag type, and the speed control output of the adjustable air pump is controlled to control the strength of the vibration of the adjustable air pump, the frequency and flow rate of the inhaled airflow fluctuation, so as to perform noise reduction control, and the inflation control is performed by identifying the airbag type to avoid frequent start and stop of the adjustable air pump, reduce interference to the power supply, and control the start and stop of the adjustable air pump according to the air pressure parameters detected by the air pressure sensor. The noise reduction control method of the noise reduction intermittent pneumatic pulse device of the present invention also has the above functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use 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 ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0009] Figure 1 A schematic diagram of the framework of a noise-reducing intermittent pneumatic pulse device provided in an embodiment of the present invention;

[0010] Figure 2 A circuit diagram of an air pump power supply control circuit of an air circuit control system of a noise-reducing intermittent pneumatic pulse device provided in an embodiment of the present invention;

[0011] Figure 3 A schematic flow chart of a noise reduction control method for a noise reduction intermittent pneumatic pulse device provided by an embodiment of the present invention;

[0012] Figure 4 A schematic diagram of a sub-process of a noise reduction control method for a noise reduction intermittent pneumatic pulse device provided by an embodiment of the present invention;

[0013] Figure 5 A schematic diagram of the states of the air cavities and air ports corresponding to various airbag types of the airbag of the noise reduction intermittent pneumatic pulse device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] See also Figure 1 As shown, Figure 1 A schematic diagram of the framework of a noise-reducing intermittent pneumatic pulse device provided in an embodiment of the present invention, wherein the noise-reducing intermittent pneumatic pulse device comprises an adjustable air pump 11, an air tank 12, a three-way joint 13, an electromagnetic valve group 14, an air bag 15, an air pressure sensor 16, an air circuit control system 17 and a main control system 18, wherein the air inlet end of the adjustable air pump 11 is connected to the muffler 19 through a pipeline, the air outlet end of the adjustable air pump 11 is connected to the air tank 12 through a pipeline, the air outlet end of the air tank 12 is connected to the first end of the three-way joint 13 through a pipeline provided with a one-way valve 103, the second end of the three-way joint 13 is connected to the air pressure sensor 16 through a pipeline, and the third end of the three-way joint 13 is connected to the electromagnetic valve group 14 The output end of the solenoid valve group 14 is connected to the airbag 15 through a pipeline to inflate the airbag 15. The main control system 18 is respectively connected to the air circuit control system 17 and the airbag 15, and is used to identify the type of airbag and drive the air circuit control system 17 to work according to the identified airbag type; the air circuit control system 17 is respectively connected to the adjustable air pump 11, the air pressure sensor 16 and the solenoid valve group 14, and is used to obtain the required air pressure parameters of the corresponding airbag 15 according to the preset required air pressure parameters of different airbags 15 combined with the identified airbag type, and control the speed regulation output of the adjustable air pump 11; and is used to control the start and stop of the adjustable air pump 11 according to the air pressure parameters detected by the air pressure sensor 16.

[0016] in, Figure 1The direction of the arrow in the figure is the flow direction of the gas path. The solenoid valve group 14 can be used to control the on-off of the gas path. The three-way connector 13 is a T-type three-way connector. The adjustable air pump 11 can adopt a DC wide voltage adjustable low vibration and adjustable low speed speed regulating air pump. The adjustable air pump 11 can choose a wide voltage of 5V to 13V to start, the corresponding speed is 1800 to 3200RPM, the corresponding gas flow is 5 to 10LPM, and the working noise of the adjustable air pump 11 is 50 to 62dB. The noise reduction intermittent pneumatic pulse device is connected to the air inlet end of the adjustable air pump 11 by a muffler 19, and to the air outlet end of the adjustable air pump 11 by one end of an air tank 12 connected to a one-way valve 103 at the other end, so as to offset the noise passively generated by the inhaled airflow when the adjustable air pump 11 is working, thereby reducing the noise and vibration caused by the operation of the equipment; at the same time, a main control system 18 connected to the air path control system 17 and the air bag 15 is set to identify the type of the air bag and drive the air path control system 17 to work according to the identified air bag type, and the air path control system 17 is connected to the adjustable air pump 11, The air pressure sensor 16 is connected to the solenoid valve group 14, so as to obtain the required air pressure parameters of the corresponding air bag 15 according to the preset required air pressure parameters of different air bags 15 combined with the identified air bag type, and control the speed regulation output of the adjustable air pump 11 to control the strength of the vibration of the adjustable air pump 11, the frequency and flow rate of the suction air flow fluctuation, so as to perform noise reduction control, and by identifying the air bag type to perform inflation control to avoid frequent starting and stopping of the adjustable air pump 11, reduce interference to the power supply, and control the start and stop of the adjustable air pump 11 according to the air pressure parameters detected by the air pressure sensor 16.

[0017] Specifically, the air inlet end of the muffler 19 is provided with a muffler cotton 104, and the air outlet end of the muffler 19 is connected to the air inlet end of the adjustable air pump 11 through a pipeline to improve the muffler effect.

[0018] Preferably, the silencer cotton 104 is arc-shaped, and the concave surface of the silencer cotton 104 is close to the air inlet end of the muffler 19 , so that the silencer cotton 104 is covered on the air inlet end of the muffler 19 .

[0019] Combination Figure 2Specifically, the gas path control system 17 includes a gas path control chip and an air pump power supply control circuit, the air pump power supply control circuit includes a power supply chip U1, a first inductor L1, a Schottky diode D1 and a first voltage-dividing resistor group 101, the voltage input pin VIN of the power supply chip U1 serves as the power input terminal Vin, the voltage input pin VIN of the power supply chip U1 is connected to the first grounding capacitor C1, the on / off control pin ON / OFF of the power supply chip U1 is connected to the ground and the anode of the Schottky diode D1, the cathode of the Schottky diode D1 is connected to the output pin OUT of the power supply chip U1 and the first end of the first inductor L1, and the first inductor L1 is connected to the first The two ends serve as the air pump power supply terminal Vout to be connected to the adjustable air pump 11, the first voltage-dividing resistor group 101 includes a first resistor R1 and a second resistor R2 connected in series, one end of the first resistor R1 is connected to the second end of the first inductor L1, the other end of the first resistor R1 is connected to one end of the second resistor R2, the other end of the second resistor R2 is grounded, the feedback pin FEEDBACK of the power chip U1 is electrically connected between the first resistor R1 and the second resistor R2, and the feedback pin FEEDBACK of the power chip U1 is connected to the air pump control signal pin Pump_1 of the air circuit control chip through the second voltage-dividing resistor group 102. Among them, the air pump power supply terminal Vout is used to output the power supply required to control the operation of the adjustable air pump 11, and the air pump control signal pin Pump_1 is used to provide an air pump control signal. The air circuit control chip obtains the required air pressure parameters of the corresponding airbag 15 according to the preset required air pressure parameters of the different airbags 15 combined with the identified airbag type, analyzes and obtains the power supply required to control the operation of the adjustable air pump 11, and obtains the corresponding air pump control signal in combination with the resistance information corresponding to the first voltage-dividing resistor group 101 and the second voltage-dividing resistor group 102 of the air pump power supply control circuit, so that the air pump power supply control circuit outputs the power supply required to control the operation of the adjustable air pump 11, thereby controlling the operation of the adjustable air pump 11.

[0020] Preferably, the second voltage-dividing resistor group 102 includes three resistors connected in series in sequence, which can be respectively recorded as R3, R4 and R5. A grounding capacitor can be electrically connected between two adjacent resistors, and the number of grounding capacitors is two, which can be respectively recorded as C3 and C4. C3 is electrically connected between R3 and R4, and C4 is electrically connected between R4 and R5. A second grounding capacitor C2 is electrically connected between the second end of the first inductor L1 and the first resistor R1. The relationship between the voltage value of the feedback pin FEEDBACK of the power chip U1 and the voltage value of the power supply required for the adjustable air pump 11 to work can be expressed by formula (1):

[0021]

[0022] Where VOUT Indicates the voltage value of the power supply required for the adjustable air pump 11 to work, V FEEDBACK Indicates the voltage value of the feedback pin FEEDBACK of the power chip U1, V FEEDBACK =1.25V, V Pump_1 The voltage value of the air pump control signal is represented by the resistance value of the second resistor R2 being equal to the total resistance value of the second voltage-dividing resistor group 102, wherein the resistance value of the first resistor R1 can be 6.8KΩ, the resistance value of the second resistor R2 can be 2KΩ, and the total resistance value of the second voltage-dividing resistor group 102 is 2KΩ, that is, the total resistance value of the third resistor R3, the fourth resistor R4 and the fifth resistor R5 is 2KΩ. According to formula (1), the corresponding air pump control signal can be calculated when determining the power supply required for the adjustable air pump 11 to work.

[0023] Among them, the relationship table of the required air pressure parameters of different preset airbags 15, the voltage value of the air pump control signal, the voltage value of the power supply required for the corresponding adjustable air pump 11 to work and the corresponding adjustable air pump speed is shown in the following table.

[0024]

[0025] In the above table, the air pressure value indicates the required air pressure parameter of the airbag 15, and the air pump power supply indicates the power supply required for the adjustable air pump 11 corresponding to the airbag 15 to work. It can be seen from the above table that the rotation speed of the adjustable air pump 11 decreases as the power supply required for the adjustable air pump 11 to work decreases, thereby reducing the vibration frequency.

[0026] The size of the power supply required for the adjustable air pump 11 corresponding to the airbag 15 to work determines the speed of the adjustable air pump 11, and can affect the strength of the vibration of the adjustable air pump 11, the frequency and flow rate of the inhaled air flow fluctuations, and noise control can be performed based on the regulation of the power supply required for the adjustable air pump 11 corresponding to the airbag 15 to work.

[0027] See also Figure 3 , Figure 3 A flow chart of a noise reduction control method for a noise reduction intermittent pneumatic pulse device provided in an embodiment of the present invention is provided. The noise reduction control method for a noise reduction intermittent pneumatic pulse device is applied to the above-mentioned noise reduction intermittent pneumatic pulse device. The noise reduction control method comprises the following steps:

[0028] Step S1, identifying the airbag type of the airbag in the noise reduction intermittent pneumatic pulse device;

[0029] Step S2, according to the preset required air pressure parameters of different airbags, combined with the identified airbag type, obtaining the required air pressure parameters of the corresponding airbag;

[0030] Step S3, according to the preset voltage value of the power supply required for the adjustable air pump corresponding to the different airbags, in combination with the identified airbag type, the voltage value of the power supply required for the adjustable air pump of the corresponding airbag is obtained, the corresponding air pump control signal is calculated and output, and the solenoid valve group is controlled to work, so as to control the adjustable air pump according to the obtained air pump control signal, and the speed of the adjustable air pump is controlled to reduce noise and vibration, and the air path is controlled by controlling the solenoid valve group to control the air circulation, so as to control the start and stop of the airbag inflation;

[0031] Step S4: According to the required air pressure parameter of the corresponding airbag and the air pressure parameter detected by the air pressure sensor, the start and stop of the adjustable air pump are judged, and the start and stop of the adjustable air pump are controlled according to the judgment result. When the air pressure parameter detected by the air pressure sensor is equal to the required air pressure parameter of the corresponding airbag, the judgment result is that the airbag has been inflated, and the adjustable air pump is controlled to stop working.

[0032] Among them, the working voltage of the adjustable air pump during the airbag identification is fixed at 8V. The noise reduction control method of the noise reduction intermittent pneumatic pulse device identifies the airbag type and obtains the required air pressure parameters of the corresponding airbag according to the preset required air pressure parameters of different airbags combined with the identified airbag type, controls the speed control output of the adjustable air pump, controls the strength of the air pump vibration, the frequency and flow rate of the suction airflow fluctuation, so as to perform noise reduction control, and controls the inflation by identifying the airbag type to avoid frequent start and stop of the adjustable air pump, reduce interference to the power supply, and control the start and stop of the adjustable air pump according to the air pressure parameters detected by the air pressure sensor.

[0033] Combination Figure 4 , the step S1 specifically includes:

[0034] Step S11, blocked air port determination: detecting and determining whether there is a blocked air port in the airbag, and preliminarily identifying the type of the airbag according to the sequence number of the blocked air port;

[0035] Step S12, air cavity type detection: when the air port numbered one and the air port numbered two are not blocked, the air cavity type of the air cavity connected to the air port numbered one is detected.

[0036] The states of the air cavities and air ports corresponding to the airbag types are as follows: Figure 5 As shown, the airbag includes a thigh air chamber, a calf air chamber and a sole air chamber. Figure 5 The mid-thigh air cavity, calf air cavity and sole air cavity are represented by C, B and A respectively. The calf air cavity is located between the thigh air cavity and the sole air cavity. The air bag includes three air ports. Figure 5The numbers of the air ports are one, two and three, respectively, and are represented by 1, 2 and 3 in the figure. The calf air cavity is connected to two air ports, and the air ports numbered two and three are connected to the calf air cavity. The air port numbered one can be connected to the thigh air cavity or the sole air cavity. Any of the thigh air cavity or the sole air cavity is not connected to an air port. The airbag types include sole airbags, calf airbags, sole calf airbags and calf thigh airbags, corresponding to Figure 5 (a), (b), (c) and (d). When the air cavity connected to the air port with sequence number one is not blocked, the airbag type may be one of the plantar airbag, the plantar calf airbag or the calf-thigh airbag. Then, by judging whether the air cavity connected to the air port with sequence number two is blocked, it can be confirmed whether the airbag type is the plantar airbag. When both the air cavity connected to the air port with sequence number one and the air cavity connected to the air port with sequence number two are not blocked, the airbag type may be one of the plantar calf airbag or the calf-thigh airbag. Since the capacity of the plantar air cavity and the thigh air cavity is different, and the calf air cavity is connected to the air port with sequence number two, the capacity of the air cavity connected to the air port with sequence number one can be detected to obtain the air cavity type corresponding to the air cavity connected to the air port with sequence number one, thereby confirming the airbag type according to the corresponding air cavity type. When the airbag type is a calf airbag, the air port numbered 1 is blocked, that is, the air port of the sole air cavity and the thigh air cavity are not connected. Figure 5 As shown in (b); when the airbag type is a plantar airbag, the air port numbered two is blocked, that is, the calf air cavity is not connected to the air port, such as Figure 5 As shown in (a); when the airbag type is the foot calf airbag, the three air ports are all connected but the thigh air cavity is not connected to the air port, such as Figure 5 As shown in (c); when the airbag type is a calf-thigh airbag, the three air ports are all connected but the sole air cavity is not connected to the air port, such as Figure 5 As shown in (d) in the figure, by judging whether the airbag in the noise reduction intermittent pneumatic pulse device has a blocked air port and preliminarily identifying the type of the airbag according to the serial number of the blocked air port, the type of the airbag is confirmed according to the air cavity type of the air cavity connected to the air port with serial number 1, which is convenient and simple to operate with high accuracy.

[0037] Preferably, in some embodiments, the calf air cavity may include two air chambers, and the air chambers may correspond to the air ports one by one, and the air chambers are respectively connected to the corresponding air ports.

[0038] Specifically, in some embodiments, step S11 includes:

[0039] The adjustable air pump is started to inflate the air ports in sequence; wherein the adjustable air pump is controlled to inflate the air ports, thereby infusing the air cavities connected to the air ports;

[0040] Determine whether the corresponding air port is blocked according to the inflation condition of the air cavity connected to the corresponding air port, and record the serial number of the blocked air port;

[0041] When the air port numbered one is blocked and the air port numbered two is connected to the air cavity, the airbag type is identified as a calf airbag;

[0042] When the air port numbered one is connected to the air cavity and the air port numbered two is blocked, the airbag type is identified as a plantar airbag.

[0043] The step of judging whether the air port is blocked according to the inflation condition of the air cavity connected to the corresponding air port is specifically as follows:

[0044] Compare whether the air pressure of the air cavity connected to each air port within the preset time is greater than the preset pressure value. If so, it is determined that the air port connected to the air cavity whose air pressure is greater than the preset pressure value is blocked.

[0045] Specifically, the step S12 includes:

[0046] When both the air port numbered one and the air port numbered two are not blocked, the adjustable air pump is started to inflate the air port numbered one, so as to inflate the air cavity connected to the air port numbered one to a preset pressure, and the total inflation time is recorded;

[0047] When the total inflation time is greater than the preset critical inflation time, the air cavity type of the air cavity connected to the air port with sequence number 1 is identified as a thigh air cavity, and the corresponding air bag type is a calf thigh air bag;

[0048] When the total inflation time is less than the preset critical inflation time, the air cavity type of the air cavity connected to the air port with sequence number 1 is identified as a plantar air cavity, and the corresponding air bag type is a plantar calf air bag.

[0049] In summary, the noise reduction intermittent pneumatic pulse device of the present invention connects a muffler to the air inlet end of the adjustable air pump, and connects one end of an air tank with a one-way valve at the other end to the air outlet end of the adjustable air pump to offset the noise passively generated by the inhaled airflow when the adjustable air pump is working, thereby reducing the noise and vibration caused by the equipment when working; at the same time, by setting a main control system connected to the air path control system and the airbag, the airbag type is identified and the air path control system is driven to work according to the identified airbag type, and the air path control system is connected to the adjustable air pump, the air pressure sensor and the solenoid valve group, so that the required air pressure parameters of the corresponding airbag can be obtained according to the preset required air pressure parameters of different airbags combined with the identified airbag type, and the speed control output of the adjustable air pump can be controlled to control the strength of the vibration of the adjustable air pump, the frequency and flow rate of the inhaled airflow fluctuation, so as to perform noise reduction control, and the inflation control is performed by identifying the airbag type to avoid frequent starting and stopping of the adjustable air pump, reduce interference to the power supply, and control the start and stop of the adjustable air pump according to the air pressure parameters detected by the air pressure sensor. The noise reduction control method of the noise reduction intermittent pneumatic pulse device of the present invention also has the above functions.

[0050] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A noise-reducing intermittent pneumatic pulse device, characterized in that: The invention comprises an adjustable air pump, an air tank, a three-way joint, an electromagnetic valve group, an air bag, an air pressure sensor, an air circuit control system and a main control system, wherein the air inlet end of the adjustable air pump is connected to the muffler through a pipeline, the air outlet end of the adjustable air pump is connected to the air tank through a pipeline, the air outlet end of the air tank is connected to the first end of the three-way joint through a pipeline provided with a one-way valve, the second end of the three-way joint is connected to the air pressure sensor through a pipeline, the third end of the three-way joint is connected to the electromagnetic valve group, the output end of the electromagnetic valve group is connected to the air bag through a pipeline, To inflate the airbag, the main control system is respectively connected to the air circuit control system and the airbag, and is used to identify the type of airbag and drive the air circuit control system to work according to the identified airbag type; the air circuit control system is respectively connected to the adjustable air pump, the air pressure sensor and the solenoid valve group, and is used to obtain the required air pressure parameters of the corresponding airbag according to the preset required air pressure parameters of different airbags combined with the identified airbag type, and control the speed regulation output of the adjustable air pump; and is used to control the start and stop of the adjustable air pump according to the air pressure parameters detected by the air pressure sensor.

2. The noise-reducing intermittent pneumatic pulse device according to claim 1, characterized in that: The air inlet end of the muffler is provided with silencer cotton, and the air outlet end of the muffler is connected to the air inlet end of the adjustable air pump through a pipeline.

3. The noise-reducing intermittent pneumatic pulse device according to claim 2, characterized in that: The silencer cotton is arc-shaped, and the concave surface of the silencer cotton is close to the air inlet end of the silencer, so that the silencer cotton cover is arranged at the air inlet end of the silencer.

4. The noise-reducing intermittent pneumatic pulse device according to claim 1, characterized in that: The gas circuit control system includes a gas circuit control chip and an air pump power supply control circuit, the air pump power supply control circuit includes a power supply chip, a first inductor, a Schottky diode and a first voltage-dividing resistor group, the voltage input pin of the power supply chip serves as a power supply input end, the voltage input pin of the power supply chip is connected to a first grounding capacitor, the on-off control pin of the power supply chip is connected to the ground and the anode of the Schottky diode, the cathode of the Schottky diode is connected to the output pin of the power supply chip and the first end of the first inductor, the second end of the first inductor serves as an air pump power supply end to be connected to the adjustable air pump, the first voltage-dividing resistor group includes a first resistor and a second resistor connected in series, one end of the first resistor is connected to the second end of the first inductor, the other end of the first resistor is connected to one end of the second resistor, the other end of the second resistor is grounded, the feedback pin of the power supply chip is electrically connected between the first resistor and the second resistor, and the feedback pin of the power supply chip is connected to the air pump control signal pin of the gas circuit control chip through the second voltage-dividing resistor group.

5. The noise-reducing intermittent pneumatic pulse device according to claim 4, characterized in that: The second voltage-dividing resistor group includes three resistors connected in series in sequence.

6. A noise reduction control method for a noise reduction intermittent pneumatic pulse device, characterized in that: The following steps are involved: Identify the airbag type of the airbag in the noise-reducing intermittent pneumatic pulse device; According to the preset required air pressure parameters of different airbags, the required air pressure parameters of the corresponding airbags are obtained in combination with the airbag types obtained by identification; According to the preset voltage value of the power supply required for the adjustable air pump corresponding to the different airbags, the voltage value of the power supply required for the adjustable air pump of the corresponding airbag is obtained in combination with the airbag type obtained by identification, the corresponding air pump control signal is calculated and output, and the solenoid valve group is controlled to work; The start and stop of the adjustable air pump is judged according to the required air pressure parameters of the corresponding airbag and the air pressure parameters detected by the air pressure sensor, and the start and stop of the adjustable air pump is controlled according to the judgment result.

7. The noise reduction control method for noise reduction intermittent pneumatic pulse equipment according to claim 6, characterized in that: The step of identifying the airbag type of the airbag in the noise reduction intermittent pneumatic pulse device specifically includes: Blocked air port judgment: Detect and judge whether the airbag has a blocked air port, and preliminarily identify the type of airbag according to the sequence number of the blocked air port; Air cavity type detection: when the air port numbered one and the air port numbered two are not blocked, the air cavity type of the air cavity connected to the air port numbered one is detected.

8. The noise reduction control method for noise reduction intermittent pneumatic pulse equipment according to claim 7, characterized in that: The steps of determining the blocked air outlet include: Start the adjustable air pump and inflate the air ports in sequence; Determine whether the corresponding air port is blocked according to the inflation condition of the air cavity connected to the corresponding air port, and record the serial number of the blocked air port; When the air port numbered one is blocked and the air port numbered two is connected to the air cavity, the airbag type is identified as a calf airbag; When the air port numbered one is connected to the air cavity and the air port numbered two is blocked, the airbag type is identified as a plantar airbag.

9. The noise reduction control method for noise reduction intermittent pneumatic pulse equipment according to claim 7, characterized in that: The step of detecting the air cavity type comprises: When both the air port numbered one and the air port numbered two are not blocked, the adjustable air pump is started to inflate the air port numbered one, so as to inflate the air cavity connected to the air port numbered one to a preset pressure, and the total inflation time is recorded; When the total inflation time is greater than the preset critical inflation time, the air cavity type of the air cavity connected to the air port with sequence number 1 is identified as a thigh air cavity, and the corresponding air bag type is a calf thigh air bag; When the total inflation time is less than the preset critical inflation time, the air cavity type of the air cavity connected to the air port with sequence number 1 is identified as a plantar air cavity, and the corresponding air bag type is a plantar calf air bag.

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