CN1864616A - Air pressure sensing vacuum cleaner - Google Patents

Air pressure sensing vacuum cleaner Download PDF

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Publication number
CN1864616A
CN1864616A CNA200610081176XA CN200610081176A CN1864616A CN 1864616 A CN1864616 A CN 1864616A CN A200610081176X A CNA200610081176X A CN A200610081176XA CN 200610081176 A CN200610081176 A CN 200610081176A CN 1864616 A CN1864616 A CN 1864616A
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China
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resistance
chip microcomputer
circuit
pin
vacuum cleaner
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CNA200610081176XA
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CN100425191C (en
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田吉传
俞建福
周伦舜
唐德亮
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NINGBO FUDA ELECTRIC APPLIANCE CO Ltd
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NINGBO FUDA ELECTRIC APPLIANCE CO Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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Abstract

The air pressure sensing vacuum cleaner includes a plastic casing, a dust collecting and filtering device, a sucker, a blower, etc. as well as a blower speed regulating controller for regulating the running state of the blower. The blower speed regulating controller has one end connected to the air channel of the dust collecting bin, and the negative pressure in the air channel is measured and calculated before the control signal is output for driving the blower to run in different power. Increasing the intelligent control system based on air pressure detecting technology and monolithic computer control technology makes the vacuum cleaner operate in optimized state. During no cleaning while the vacuum cleaner is on, the power of the motor is decreased automatically, and this results in saving in power and lowered noise.

Description

Air pressure sensing vacuum cleaner
Technical field
The present invention relates to a kind of household electrical appliance, particularly relate to a kind of domestic suction cleaner of novel energy-conserving technology.
Prior art
Existing domestic suction cleaner is to use electric fan to rotate the pull of vacuum (negative-pressure air-flow) that is produced at a high speed to collect dust, cleaning ambient.Therefore, dust catcher is in use inhaled contacting of tool and the place of being cleaned, and the state of its suction inlet will change at random, and inhalation machine interior air mass flow or flow velocity also will be changed thereupon.Leave when being cleaned the place when inhaling tool, the suction inlet face opens wide, and throughput increases, and the electric fan power in the machine is increased; When the suction tool pressed close to be cleaned the place, the suction inlet face narrowed down, and throughput reduces, and air negative pressure heightens, and the electric fan power in the machine is descended.The Changing Pattern of this air quantity/vacuum and power is the aerodynamic inherent characteristic of dust catcher.Anatomize this fan characteristic, just found such problem: promptly dust catcher will be pressed close to the place of being cleaned mutually owing to inhale tool when dust suction, and the power of fan of this moment descends thereupon; Otherwise, leaving when being cleaned the place when inhaling tool, the power of fan of this moment rises on the contrary.In other words, dust catcher is at run duration, and when not cleaning, the power consumption of motor is big on the contrary.Therefore we can say that such fan characteristic is not energy-conservation.
Consider from energy-conservation angle whether dust catcher can be by our requirement, when run duration did not clean, the operate power of motor descended automatically, to reduce the consumption of electric energy; And when cleaning, the operate power of motor just rises automatically, to improve the effect of cleaning dedusting.Under world today's energy-intensive overall background, this power-saving technology will be rapidly developed.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of domestic suction cleaner of novel energy-conserving technology.It adopts air pressure sensing detection technique and single-chip microcomputer control technology, makes dust catcher have intelligent Energy Saving Control ability, and the utilization ratio of electric energy obviously improves.
For achieving the above object, technical scheme of the present invention is: described air pressure sensing type dust catcher comprises shell plastic, dust collecting and filtering device, suction tool annex, electric fan etc.; Described dust catcher also includes an electric fan speed setting controller in order to control electric fan running status, one end of this electric fan speed setting controller is connected with the dust compartment air flue of dust catcher, air negative pressure measured value in this dust compartment air flue is carried out exporting control signal after the computing amplification, be used to drive electric fan and move by different capacity.
Described electric fan speed setting controller comprises baroceptor, pressure detection circuit, single chip machine controlling circuit, the led state display circuit, the operational order button, motor-drive circuit, step-down rectifying circuit etc., described baroceptor and pressure detection circuit are integrated in air pressure and detect on the pcb board, this air pressure detects in the dust compartment air flue that pcb board is arranged on described dust catcher and to the air negative pressure in the dust compartment air flue and detects, the pressure signal of its output is after further amplifying, send by single chip machine controlling circuit and carry out the pressure data calculation process, and by setup program and come the instruction of no-operation instruction button that the corresponding driving signal is transported to motor-drive circuit, and then drive electric fan according to different operate power operations, in the described single chip machine controlling circuit, the program control instruction of single-chip microcomputer is delivered to the led state display simultaneously via the led state display circuit, in order to the work running status of display device, and dc source provides regulated power by step-down rectifying circuit for single chip machine controlling circuit.
Vacuum cleaner of the present invention has been set up the intelligence control system of forming with air pressure sensing detection technique, single-chip microcomputer control technology etc. in electric fan speed setting controller unit.The utilization of this new technology, the operational factor or the state of dust catcher can be finished automatically according to optimizing the working procedure that is provided with, can be on request, when the dust catcher run duration does not clean, the operate power of its motor descends automatically, thereby reached energy-efficient purpose, and improved and reduced the running noises of dust catcher when not cleaning.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is an electric fan speed setting controller block diagram of the present invention.
Fig. 3 is baroceptor of the present invention, pressure detection circuit schematic diagram.
Fig. 4 is single chip machine controlling circuit of the present invention and peripheral circuit schematic diagram.
Fig. 5 is a motor-drive circuit schematic diagram of the present invention.
Fig. 6 is a step-down rectifying circuit schematic diagram of the present invention.
The specific embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
As shown in Figure 1: a kind of novel energy-conserving technology provided by the invention vacuum cleaner, its basic structure and common type difference are little, and complete machine is by formations such as shell plastic 1, dust collecting and filtering device 3, suction tool annex 2, electric fan 6, electric fan speed setting controllers.
Vacuum cleaner of the present invention in electric fan speed setting controller unit, has been set up the intelligence control system of forming with air pressure sensing detection technique, single-chip microcomputer control technology etc.The utilization of new technology makes the operational factor or the state of dust catcher, finishes automatically according to optimizing the working procedure that is provided with, thereby reaches energy-efficient and reduce the purpose of noise.
Fig. 2 is an electric fan speed setting controller block diagram of the present invention.It is made up of baroceptor 5, pressure detection circuit, single chip machine controlling circuit, led state display circuit, operational order button, motor-drive circuit, step-down rectifying circuit etc.
Described baroceptor 5 and pressure detection circuit are integrated in air pressure and detect on the pcb board 4, this air pressure detects in the dust compartment air flue 10 that pcb board 4 is arranged on described dust catcher and to the air negative pressure in the dust compartment air flue 10 and detects, the pressure signal of its output is after further amplifying, send by single chip machine controlling circuit and carry out the pressure data calculation process, and by setup program and come the instruction of no-operation instruction button 7 that the corresponding driving signal is transported to motor-drive circuit, and then drive electric fan 6 according to different operate power operations, in the described single chip machine controlling circuit, the program control instruction of single-chip microcomputer is delivered to the led state display simultaneously via the led state display circuit, in order to the work running status of display device, and dc source provides regulated power by step-down rectifying circuit for single chip machine controlling circuit.
On Fig. 1 complete machine structure schematic diagram, the electric fan speed setting controller is made of air pressure detection pcb board 4, operational order keypad 7, Single-chip Controlling pcb board 8, led state display board 9.Baroceptor 5 is installed in air pressure and detects on the pcb board 4, air pressure detects pcb board 4 and is arranged near the dust compartment air flue 10 of dust catcher, there is a pressure port at the center of baroceptor 5, it communicates with a transfer port 11 of cleaner dust-collection storehouse air flue 10, in order to detect the air negative pressure in the dust compartment air flue 10.
In vacuum cleaner of the present invention, described air pressure sensing detection technique is to adopt a slice pressure sensor 5 to detect the interior air negative pressure of cleaner dust-collection storehouse air flue.This baroceptor 5 has adopted up-to-date silicon chip micro mechanical technology, uses piezoresistive strain sheet ion and is infused in the Hui Sitong bridge arrangement.The variation of air negative pressure in the piezoresistive strain sheet energy perception dust compartment air flue 10.By the Hui Sitong bridge circuit mode output pressure electric potential signal that four piezoresistive strain sheets are formed, realized pressure is changed the process that is converted into electric quantity change, just gas/electricity conversion.Air pressure is big more, and the potential difference of Hui Sitong bridge circuit output is big more.
The air pressure signal voltage of baroceptor output has only millivolt level (mV), and therefore deficiency, also must further amplify pressure signal so that single-chip microcomputer carries out the data sampling computing.
Pressure detection circuit is integrated in air pressure by a slice double operational 358 and peripheral cell and detects on the pcb board 4, is baroceptor of the present invention, pressure detection circuit schematic diagram as Fig. 3.It amplifies the millivolt step voltage of baroceptor output more than 100 times, makes the monolithic function carry out data sampling and calculation process.
Described pressure detection circuit comprises that several the resistance R 1 of a slice integrated circuit 358 double operational U1 and periphery are to R7, two adjustable resistance R W1 and RW2 etc., in described baroceptor 5, the pressure difference signal of favour stone bridge circuit inputs between 2 pin of amplifier U1:A and 3 pin via resistance R 1 and resistance R 2 and amplifies, resistance R 1 equates with the ratio of R3 with ratio and the resistance R 2 of R4, determined the voltage amplification coefficient of amplifier U1:A, the adjustable resistance RW1 that is used to regulate the zero-pressure value is connected to an arm of Hui Sitong bridge circuit, output 1 pin output amplification pressure difference signal voltage of amplifier U1:A, input to in-phase end 5 pin of amplifier U1:B through resistance R 5, amplifier U1:B and resistance R 6 have constituted the signal voltage follower, it has higher input resistance and lower output impedance, adjustable resistance RW2 is connected to output 7 pin of amplifier U1:B, be used to regulate the full scale pressure value, send into single-chip microcomputer after signal voltage value is set up by adjustable resistance RW2 and carry out the data processing.
In vacuum cleaner of the present invention, by the air pressure sensing detection technique, single-chip microcomputer just can monitor negative pressure of vacuum changing condition and the process in the cleaner dust-collection storehouse air flue 10.When the setting dust catcher operated in automatic transmission, single-chip microcomputer will be automatically according to whether inhaling tool annex 2 ground proximitys (place is cleaned), the operate power of regulating electric fan 6 automatically.
When automatic running scheme was achieved in that suction tool annex 2 ground proximitys (or the place that is cleaned), this variable parameter that negative pressure value heightens in the dust compartment air flue 10 was as the lifting instruction of electric fan 6 operate powers; In the time of will inhaling tool annex 2 built on stilts (or the place that is cleaned), this variable parameter that negative pressure value subtracts greatly in the dust compartment air flue 10 is as the reduction instruction of electric fan 6 operate powers.Single-chip microcomputer will be after motion tracking air pressure detects the variation of data and carries out logical operation, the running status of regulating dust catcher electric fan 6 automatically.
In vacuum cleaner of the present invention, single chip machine controlling circuit is made of single-chip microcomputer and peripheral cell.Fig. 4 is single chip machine controlling circuit of the present invention and peripheral circuit schematic diagram.Described single chip machine controlling circuit, comprise single-chip microcomputer U2 and correspondent peripheral circuit, said elements is integrated on the Single-chip Controlling pcb board 8,2 pin of this single-chip microcomputer U2, the external crystal oscillator B1 of 3 pin, clock reference with the common construction system of single-chip microcomputer internal circuit, the 7 pin I/O mouths of single-chip microcomputer U2 join through resistance R 21 and power supply N end, introduce the civil power zero cross signal, for the Synchronization Control of controllable silicon Q2 provides fiducial time, air pressure signal voltage is input to the 11 pin I/O mouths of single-chip microcomputer U2 through resistance R 8, after carrying out the barometric information computing by the single-chip microcomputer built-in system, driving signal by 5 pin I/O mouth output motors, make electric fan 6 follow procedures control operation, 12 of described single-chip microcomputer U2,13,14,15,16 pin I/O mouths connect the led state display circuit.
Described led state display circuit comprises LED1 to the LED9 air pressure intensity indicator lamp that is integrated on the led state display board 9, and led state display board 9 is arranged on the top, rear portion of dust catcher, so that the user observes.Wherein LED1 to LED5 is an air pressure intensity indicator lamp, and these 5 LED are arranged in order, in order to show the negative pressure of vacuum grade in the dust compartment air flue 10.Dust catcher is when operation, because the variation of suction inlet state, and the formed different atmospheric pressure states of control of dust situation in the dust compartment, baroceptor all will detect faithfully, and will detect data and give single-chip microcomputer and carry out computing, single-chip microcomputer is lighted LED light successively according to operation result.Therefore, the user can understand the current ruuning situation of dust catcher easily from the dynamic demonstration of LED.
In working procedure; also be provided with dust-full alarm and protection function; single-chip microcomputer will detect data and carry out logical operation from motion tracking air pressure; when dust-full state occurring; single-chip microcomputer receives hyperbar data that baroceptor detects greater than after tens of seconds; automatically reduce the operate power of dust catcher electric fan 6, and the warning lamp LED5 on the driving LED status display panel 9 is a blink states.Remind user (user) to need the control of dust in the cleaning dust compartment.
In vacuum cleaner of the present invention, also set the different running method of dust catcher, there is basic, normal, high third gear available, in described single chip machine controlling circuit, its programming can be set dust catcher and operate in following state: 1. low-power (L) running status, 2. in power (M) running status, 3. high power (H) running status, 4. automatic transmission (AUT) running status; By 17,18,19, the 6 pin I/O mouths of single-chip microcomputer U2, light LED6, LED7, LED8, LED9 running LED respectively; By 8,9 pin I/O mouths of single-chip microcomputer (U2) external two button SW1 and SW2, the manual command's operated key 7 that switches as the dust catcher working procedure.
Single-chip microcomputer will be according to the working procedure work of artificial setting.The operational mode of dust catcher, can manually be provided with by the outer operational order keypad 7 of machine, also can be by being installed in the IR remote controller on the hose, carry out the switching of working procedure, infrared remote control receiver is installed on dust collector host, can be with the 10 pin I/O mouths input of runs program instructions via single-chip microcomputer U2, single-chip microcomputer will be controlled the dust catcher operation automatically by command request.Single-chip microcomputer will detect data by operating instruction and air pressure, the civil power zero cross signal carries out logical operation, exports the phase shift trigger impulse to motor-drive circuit by one group of I/O mouth of single-chip microcomputer, in order to the running status of control electric fan; On the other hand, another group I/O mouth of single-chip microcomputer drives corresponding led state display board 9, to represent the running status of current dust catcher.
As Fig. 5 is motor-drive circuit schematic diagram of the present invention.Described motor-drive circuit comprises driving triode Q1, bidirectional triode thyristor Q2 and peripheral resistance R 22, R23, R24 and capacitor C 6, dust catcher is when operation, phase shift triggering signal by the output of 5 pin of single-chip microcomputer U2, through the b-e of resistance R 20, R22, driving triode Q1 knot, make and drive triode Q1 saturation conduction, for bidirectional triode thyristor Q2 provides the conducting trigger current, resistance R 23 is a current-limiting resistance, the 7 pin I/O mouths of single-chip microcomputer U2 are introduced civil power zero passage synchronizing signal through resistance R 21, and controlling for the zero passage phase shift triggering of controllable silicon Q2 provides benchmark.
Fig. 6 is a step-down rectifying circuit schematic diagram of the present invention.Described step-down rectifying circuit is connected successively by anti-interference capacitor C11, decompression capacitor C10, current-limiting resistance R26, voltage-stabiliser tube V3, commutation diode V2, storage capacitor C9, electronic regulation source etc., described electronic regulation source is made up of triode Q3, voltage-stabiliser tube V1, base electrode bias resistance R25, this electronic regulation source output 5V voltage is for single chip machine controlling circuit and peripheral circuit provide electric energy.
In vacuum cleaner of the present invention, owing in electric fan speed setting controller unit, set up intelligence control system with air pressure sensing detection technique, single-chip microcomputer control technology etc.The utilization of new technology, make the operational factor or the state of dust catcher, can finish automatically according to optimizing the working procedure that is provided with, dust catcher can be by our requirement, when run duration does not clean, the operate power of motor descends automatically, to reduce the consumption of electric energy, has reached purpose energy-efficient and the reduction noise.Under world today's energy-intensive overall background, this power-saving technology will be rapidly developed.

Claims (11)

1, a kind of air pressure sensing vacuum cleaner, comprise shell plastic (1), dust collecting and filtering device (3), inhale tool annex (2), electric fan (6) etc., it is characterized in that: described dust catcher also includes an electric fan speed setting controller in order to control electric fan running status, one end of this electric fan speed setting controller is connected with the dust compartment air flue (10) of dust catcher, air negative pressure measured value in this dust compartment air flue (10) is carried out exporting control signal after the computing amplification, be used to drive electric fan (6) and press the different capacity operation.
2, vacuum cleaner according to claim 1, it is characterized in that: described electric fan speed setting controller comprises baroceptor (5), pressure detection circuit, single chip machine controlling circuit, the led state display circuit, operational order button (7), motor-drive circuit, step-down rectifying circuit etc., described baroceptor (5) and pressure detection circuit are integrated in air pressure and detect on the pcb board (4), this air pressure detects in the dust compartment air flue (10) that pcb board (4) is arranged on described dust catcher and to the air negative pressure in the dust compartment air flue (10) and detects, the pressure signal of its output is after further amplifying, send by single chip machine controlling circuit and carry out the pressure data calculation process, and by setup program and come the instruction of no-operation instruction button (7) that the corresponding driving signal is transported to motor-drive circuit, and then drive electric fan (6) according to different operate power operations, in the described single chip machine controlling circuit, the program control instruction of single-chip microcomputer is delivered to the led state display simultaneously via the led state display circuit, in order to the work running status of display device, and dc source provides regulated power by step-down rectifying circuit for single chip machine controlling circuit.
3, vacuum cleaner according to claim 1 and 2, it is characterized in that: described baroceptor (5) adopts up-to-date silicon chip micro mechanical technology, being applied to piezoresistive strain sheet ion is infused in the Hui Sitong bridge arrangement, there is a pressure port at this baroceptor (5) center, it communicates with a transfer port (11) of cleaner dust-collection storehouse air flue (10), piezoresistive strain sheet in the baroceptor (5) is with the resistance value of the variation change self of pressure, and the Hui Sitong bridge circuit is converted into electric quantity signal output with this pressure resistance value.
4, vacuum cleaner according to claim 1 and 2, it is characterized in that: described pressure detection circuit comprises that several the resistance (R1) of a slice integrated circuit (358) double operational (U1) and periphery are to (R7), two adjustable resistances (RW1) and (RW2) etc., in described baroceptor (5), the pressure difference signal of favour stone bridge circuit inputs between 2 pin of amplifier (U1:A) and 3 pin via resistance (R1) and resistance (R2) and amplifies, resistance (R1) equates with the ratio of (R3) with the ratio and the resistance (R2) of (R4), determined the voltage amplification coefficient of amplifier (U1:A), the adjustable resistance (RW1) that is used to regulate the zero-pressure value is connected to an arm of Hui Sitong bridge circuit, output 1 pin output amplification pressure difference signal voltage of amplifier (U1:A), input to in-phase end 5 pin of amplifier (U1:B) through resistance (R5), amplifier (U1:B) has constituted the signal voltage follower with resistance (R6), it has higher input resistance and lower output impedance, adjustable resistance (RW2) is connected to output 7 pin of amplifier (U1:B), be used to regulate the full scale pressure value, send into single-chip microcomputer after signal voltage value is set up by adjustable resistance (RW2) and carry out the data processing.
5, vacuum cleaner according to claim 1 and 2, it is characterized in that: described single chip machine controlling circuit, comprise single-chip microcomputer (U2) and correspondent peripheral circuit, said elements is integrated on the Single-chip Controlling pcb board (8), 2 pin of this single-chip microcomputer (U2), the external crystal oscillators of 3 pin (B1), clock reference with the common construction system of single-chip microcomputer internal circuit, 7 pin I/O mouths of single-chip microcomputer (U2) join through resistance (R21) and power supply N end, introduce the civil power zero cross signal, for the Synchronization Control of controllable silicon (Q2) provides fiducial time, air pressure signal voltage is input to 11 pin I/O mouths of single-chip microcomputer (U2) through resistance (R8), after carrying out the barometric information computing by the single-chip microcomputer built-in system, driving signal by 5 pin I/O mouth output motors, make electric fan (6) follow procedure control operation, 12 of described single-chip microcomputer (U2), 13,14,15,16 pin I/O mouths connect the led state display circuit.
6, vacuum cleaner according to claim 1 and 2, it is characterized in that: described led state display circuit comprises LED1 to the LED9 air pressure intensity indicator lamp that is integrated on the led state display board (9), dust catcher is when operation, single-chip microcomputer is lighted LED1 to LED5 air pressure intensity indicator lamp after the barometric information of baroceptor (5) is carried out computing successively.
7, vacuum cleaner according to claim 6 is characterized in that: when single-chip microcomputer receive hyperbar data that baroceptor detects greater than tens of seconds after, dust catcher changes low power run automatically over to, and the flicker of LED5 lamp is reported to the police.
8, vacuum cleaner according to claim 5, it is characterized in that: described single chip machine controlling circuit, its programming can be set dust catcher and operate in following state: 1. low-power (L) running status, 2. in power (M) running status, 3. high power (H) running status, 4. automatic transmission (AUT) running status; By 17,18,19,6 pin I/O mouths of single-chip microcomputer (U2), light LED6, LED7, LED8, LED9 running LED respectively; By external two buttons (SW1) of 8,9 pin I/O mouths of single-chip microcomputer (U2) and (SW2), the manual command's operated key (7) that switches as the dust catcher working procedure.
9, vacuum cleaner according to claim 5, it is characterized in that: described single chip machine controlling circuit, the switching of its dust catcher working procedure, can also be by being installed in the IR remote controller on the hose, carry out the switching of working procedure, infrared remote control receiver is installed on dust collector host, can be with the 10 pin I/O mouths input of runs program instructions via single-chip microcomputer (U2), single-chip microcomputer will be controlled the dust catcher operation automatically by command request.
10, vacuum cleaner according to claim 1 and 2, it is characterized in that: described motor-drive circuit comprises driving triode (Q1), bidirectional triode thyristor (Q2) and peripheral resistance (R22), (R23), (R24) and electric capacity (C6), dust catcher is when operation, phase shift triggering signal by the output of 5 pin of single-chip microcomputer (U2), through resistance (R20), (R22), drive the b-e knot of triode (Q1), make and drive triode (Q1) saturation conduction, (Q2) provides the conducting trigger current for bidirectional triode thyristor, resistance (R23) is current-limiting resistance, 7 pin I/O mouths of single-chip microcomputer (U2) are introduced civil power zero passage synchronizing signal through resistance (R21), and controlling for the zero passage phase shift triggering of controllable silicon (Q2) provides benchmark.
11, vacuum cleaner according to claim 1 and 2, it is characterized in that: described step-down rectifying circuit is connected successively by anti-interference capacitor (C11), decompression capacitor (C10), current-limiting resistance (R26), voltage-stabiliser tube (V3), commutation diode (V2), storage capacitor (C9), electronic regulation source etc., described electronic regulation source is made up of triode (Q3), voltage-stabiliser tube (V1), base electrode bias resistance (R25), this electronic regulation source output 5V voltage.
CNB200610081176XA 2006-05-24 2006-05-24 Air pressure sensing vacuum cleaner Expired - Fee Related CN100425191C (en)

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CN111297262A (en) * 2019-12-05 2020-06-19 小狗电器互联网科技(北京)股份有限公司 Vacuum pressure detection tool and detection device for cleaning equipment
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