JP2612288B2 - Electric vacuum cleaner - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a vacuum cleaner in which the rotation of an electric blower is controlled by a sensor unit that senses the pressure of air in an intake or exhaust air passage.

(Prior Art) Conventionally, a sensor unit provided in a vacuum cleaner of this type includes a pressure pipe mounting unit 1, an ambient pressure sensing unit 2, and a terminal unit 3 as shown in FIGS. And a pressure sensor 4 for outputting an electric signal corresponding to a relative pressure between the pressure guided to the pressure tube mounting portion 1 and the surrounding pressure from the terminal portion 3. That is, the terminal portion 3 is connected to the conductive pattern 7 on the rear surface of the substrate 5 by the solder 8 such that the pressure tube mounting portion 1 projects to the rear surface of the substrate 5 through the through hole 6 formed in the substrate 5. . Then, on the rear surface side of the substrate 5, the pressure tube mounting portion 1 of the pressure sensor 4 is press-fitted and connected to one end of the pressure tube 9, and the other end of the pressure tube 9 is communicated with, for example, an intake air passage in the cleaner body. ing.
The substrate 5 is disposed in an atmospheric pressure space separated from the air passage in the cleaner body.

(Problems to be Solved by the Invention) However, in the conventional configuration shown in FIGS. 14 to 16, the sensor section senses the relative pressure of the pressure guided to the pressure pipe mounting section 1 with respect to the atmospheric pressure. The individual pressure sensor 4 can only sense the relative pressure of the pressure at some point in the air passage in the cleaner body to the atmospheric pressure. Therefore, even if the pressure detected by the pressure sensor 4 fluctuates, it is not possible to determine whether the pressure is due to clogging of the dust collection filter or a change in the surface to be cleaned.

The present invention has been made in view of such problems,
It is an object of the present invention to provide an electric vacuum cleaner capable of easily detecting a pressure difference between two pressure points in an air passage in a cleaner main body regardless of a position where the pressure sensor is disposed. Another object of the present invention is to provide a vacuum cleaner that can be easily assembled.

(Means for Solving the Problems) The electric vacuum cleaner according to claim 1, wherein a dust collecting chamber having an electric blower provided in the cleaner main body and a dust collecting filter communicating with an intake side of the electric blower; A control circuit for controlling the rotation of the electric blower, and a sensor unit for sensing the pressure on the intake side and the exhaust side of the dust filter and outputting an electric signal corresponding to a difference between the sensed pressures to the control circuit. In the vacuum cleaner, the sensor unit comprises:
A first pressure tube mounting portion and a terminal portion which are disposed on a substrate on which electronic components forming the control circuit are mounted and to which a pressure tube is mounted, and which is guided to the first pressure tube mounting portion; A pressure sensor that outputs a relative pressure between the pressure and the surrounding pressure as an electric signal from the terminal portion, and a second pressure tube mounting portion that is disposed on the substrate so as to cover the pressure sensor and to which a pressure tube is mounted. And a pressure partition wall that houses the pressure sensor together with the substrate and forms a compartment that is airtightly isolated from the outside. The first pressure pipe mounting portion communicates with the exhaust side of the dust collection filter. And
The second pressure pipe mounting portion is communicated with an intake side of the dust collection filter.

According to a second aspect of the present invention, in the vacuum cleaner according to the first aspect, the sensor unit includes a first pressure pipe mounting part and a second pressure pipe mounting part located on the same surface of the pressure partition wall. It is a thing.

(Operation) The vacuum cleaner according to claim 1, wherein the dust collecting filter is formed through a second pressure pipe mounting part to which the pressure pipe is mounted in a gas-tight manner by the pressure partition having the second pressure pipe mounting part and the substrate and to which the pressure pipe is mounted. A pressure sensor having a first pressure pipe mounting portion, which is connected to the exhaust side of the dust collecting filter and has a pressure pipe mounted therein, is located in the compartment communicated with the suction side of the pressure sensor. The pressure difference between the pressure on the exhaust side of the dust collection filter guided to the pipe mounting portion and the pressure on the suction side of the dust collection filter, which is the pressure around the pressure sensor guided to the second pressure tube mounting portion of the pressure bulkhead. The pressure difference is converted into an electric signal by a pressure sensor, and the electric signal is output to a control circuit. The control circuit appropriately automatically controls the rotation of the electric blower in response to the input electric signal, for example, collects the electric signal. Dust filter The pressure difference between the intake and exhaust sides of
It becomes larger when the dust filter is clogged and becomes smaller when the dust suction port communicating with the dust collection chamber is blocked by a poorly permeable rug. Since the pressure in the intake or exhaust air passage changes due to changes in filter clogging conditions, etc., the circuit board layout should be such that the rotation of the electric blower is increased when the pressure difference is large, and reduced when the pressure difference is small. Irrespective of the location, it is easy to detect the difference between the pressures at the two locations on the intake side and the exhaust side of the dust collection filter in the air path inside the cleaner body.

According to a second aspect of the present invention, in the vacuum cleaner according to the first aspect, the first pressure pipe mounting portion of the pressure sensor and the second pressure pipe mounting portion of the pressure bulkhead are located on the same surface of the pressure bulkhead. Therefore, since the first pressure tube mounting portion of the pressure sensor does not penetrate the substrate, it becomes possible to solder the pressure sensor and the like to the substrate in an automatic solder bath,
The piping of the pressure pipes respectively connected to the first pressure pipe mounting part and the second pressure pipe mounting part is easy, and the assembling workability is improved.

(Embodiment) Hereinafter, the configuration of an embodiment of the vacuum cleaner of the present invention will be described with reference to FIG. 1 to FIG.

4 and 5, reference numeral 11 denotes a main body of the cleaner. The main body 11 of the cleaner is divided into front and rear by a partition wall 13 having a communication opening 12 formed therein. It is a dust collection chamber 14, which is a part of the road. Further, the communication port 12 is covered with a removable dust collection filter 15. Further, behind a partition wall 13 in the cleaner body 11, an electric blower 20 is supported by a holding wall 16 formed integrally with the cleaner body 11 via a rubber support 18. The intake side of the electric blower 20 communicates with the communication port 12 in opposition. Note that the intake side and the exhaust side of the electric blower 20 are air-tightly separated by a support 18 on the front side. Further, a space between the dust collection filter 15 and the intake side in front of the electric blower 20 is a negative pressure space 21 as an intake air path which is an air path on the intake side.
It has become.

The vacuum cleaner body 11 has a suction port communicating with the dust collection chamber 14.
An opening 22 is opened at the front, and an exhaust air passage 23 which is an air passage on the exhaust side in the cleaner body 11 is provided on the exhaust side of the electric blower 20.
An exhaust port 24 that communicates with the air outlet is opened at the rear. Further, an insertion pipe 26 at one end of a hose 25 is detachably connected to the suction port 22, and one end of an extension pipe 28 is detachably connected to a gripping pipe 27 at the other end of the hose 25. This extension tube 28
A connecting pipe 30 of a suction port body 29 having a dust suction port (not shown) such as a floor brush on a lower surface thereof is detachably connected to the other end of the suction port body.

Further, as shown in FIG. 4, inside the cleaner body 11,
A control circuit storage chamber 39 is formed on the side of the electric blower 20 and separated from the exhaust air passage 23 by a partition wall 38. In the control circuit storage chamber 39, a control circuit board 40 and a sensor unit 41 are provided.

Next, the configuration of the sensor section 41 will be described with reference to FIGS.

Reference numeral 42 denotes a pressure sensor. The pressure sensor 42 has a tubular first pressure pipe mounting portion 43 forming a pressure detection hole 43a, an ambient pressure detection hole 44, and a terminal portion 45. Then, the pressure guided to the surrounding pressure detection hole 44, that is, the pressure sensor 42
The relative pressure of the pressure guided to the pressure detecting hole 43a of the first pressure pipe mounting portion 43 with respect to the surrounding pressure of the above is output from the terminal portion 45 as an electric signal. As shown in FIGS. 1 and 2, the pressure sensor 42 is disposed on the control circuit board 40, and the terminal portion 45 has a terminal mounting hole formed in the control circuit board 40.
Conductive pattern 47 on the back of control circuit board 40
Soldered to. The terminal mounting hole 46 is
It is airtightly closed by 45 and solder 48. The conductive pattern 47 transmits an electric signal output from the terminal 45 by the pressure sensor 42 to a control circuit that controls the rotation of the electric blower 20.

Then, the first pressure pipe mounting portion 43 of the pressure sensor 42 is
The control circuit board 40 projects through the through hole 49 formed on the back side of the control circuit board 40. The gap between the first pressure pipe mounting portion 43 and the through hole 49 is airtightly closed by an airtight holding member 50.

Further, around the pressure sensor 42 on the surface of the control circuit board 40, a box-shaped pressure partition 51 having an open lower surface is fixed so as to cover the pressure sensor 42. An airtight holding member 52 is provided at a contact portion between the pressure bulkhead 51 and the control circuit board 40, and a compartment 53 which is surrounded by the pressure bulkhead 51 and the control circuit board 40 and has the built-in pressure sensor 42, It is air-tightly isolated from the space that is under atmospheric pressure. Further, a tubular second pressure pipe mounting portion 54 communicating with the internal compartment 53 is formed in the pressure partition wall 51 so as to protrude upward and outward.

As shown in FIG. 4, one end of a flexible second pressure pipe 55 is connected to the second pressure pipe mounting portion 54 of the pressure bulkhead 51, and the other end of the second pressure pipe 55 is connected to the second pressure pipe 55. Is mounted so as to communicate with a negative pressure space 21 between the electric blower 20 and the dust collection filter 15 on the exhaust side of the dust collection filter. The first pressure pipe mounting portion 43 of the pressure sensor 42 is provided with a flexible first pressure pipe.
One end of the first pressure tube 56 is connected, and the other end of the first pressure pipe 56 is connected to the dust collection chamber on the intake side, which is upstream of the dust filter 15.
It is attached to communicate with 14.

As shown in FIG. 2, on the control circuit board 40,
IC 57 and fixed resistor 58 forming the control circuit of the electric blower 20
Also, electronic components such as a semi-fixed resistor 59 are mounted.

Next, the control circuit 61 of the electric blower 20 will be described with reference to FIG.

The electric blower 20 and a triac 63 that is a power control element are connected in series between both poles of the AC power supply 62. And
The output terminal 45 of the pressure sensor 42 constituting the sensor section 41 is connected to the comparing means 64, and the output end of the comparing means 64 is connected to the trigger output converting means 65, and the output end of the trigger output converting means 65 Are connected to the power control means 66. Further, the output terminal of the power control means 66 is a triac.
Connected to 63 gates. Also, the grip tube of the hose 25
An output terminal of a hand operation unit 67 including a switch or a variable resistor provided at 27 is connected to the comparison means 64.
The hand operation unit 67 and the electric circuit in the cleaner body 11 are
As shown in FIG. 5, electrically connected via connectors 68 and 69 which are provided in the vicinity of the suction port 22 of the cleaner body 11 and the insertion pipe 26 of the hose 25 and which are detachably connected to each other. Connected.

 Next, the operation of the first embodiment will be described.

During cleaning, the electric blower 20 drives the suction
The dust sucked together with the intake air from the dust suction port of the vacuum cleaner through the extension pipe 28 and the hose 25, the dust collection chamber 14 of the cleaner body 11
And is stored in the dust collecting chamber 14 by the dust collecting filter 15. On the other hand, the exhaust air is discharged from the exhaust port 24 to the outside of the cleaner body 11 through the exhaust air path 23.

 Here, the operation of the control circuit 61 will be described.

From the sensor unit 41, the pressure difference between the negative pressure space 21 and the inside of the dust collection chamber 14, that is, an electric current corresponding to the pressure difference between the upstream side which is the intake side of the dust collection filter 15 and the downstream side which is the exhaust pattern, The signal is output to the comparison means 64 of the control circuit 61. The comparing means 64 compares the input electric signal with a reference value, and reduces the rotation of the electric blower 20 when the pressure difference is smaller, and reduces the electric blower when the pressure difference is larger.
An electric signal is output to the trigger output conversion means 65 so as to increase the rotation of 20. The trigger output conversion means 65 controls a gate trigger pulse to the triac 63 output by the power control means 66. Then, the power control means 66 controls the input to the electric blower 20 by phase control, and controls the rotation of the electric blower 20.

In addition, the manual operation unit 67 is operated by the user, and controls on / off of the electric blower 20. Further, for example, the hand operation unit 67 may be configured by a variable resistor or the like, and a structure in which the reference value of the comparison in the comparing unit 64 can be changed by operating the hand operation unit 67 may be adopted.

Then, for example, when the surface to be cleaned is a rug with poor air permeability, and the dust suction port of the suction port body 29 is closed with the rug,
The negative pressure in the negative pressure space 21 (hereinafter, referred to as negative pressure A) and the negative pressure in the dust collection chamber 14 (hereinafter, referred to as negative pressure B) increase. Since the difference becomes smaller, the control circuit 61 controls the electric blower 20 so that the rotation speed thereof decreases. Therefore, suction of the suction port body 29 on the surface to be cleaned is reduced, and the traveling performance of the suction port body 29 is improved. When the clogging of the dust collecting filter 15 progresses, the negative pressure A increases while the negative pressure B decreases, and these negative pressures A and B are reduced.
Since the difference becomes large, the control circuit 61 controls the electric blower 20 to increase its rotation speed. Therefore, a decrease in the dust suction force due to the clogging of the dust collection filter 15 is corrected, and the suction force increases.

As in the related art, by detecting the relative pressure of one point in the air path with respect to the atmospheric pressure, for example, the pressure of the negative pressure space 21, it is not possible to determine whether the dust suction port is closed and the dust collection filter 15 is clogged. According to the configuration of the above embodiment, the pressure difference between two points in the air path can be sensed, so that the blockage of the dust suction port and the clogging of the dust collection filter 15 can be determined, and more appropriate control of the electric blower 20 can be performed. It becomes possible. In addition, pressure can be sensed at two locations in the air path with one pressure sensor 42 and regardless of the location of the pressure sensor 42 in the cleaner body 11.

Further, in the first embodiment, the sensor unit 41 is disposed in the control circuit storage chamber 39. However, since the pressure sensor 42 is actually covered by the pressure partition wall 51, the inside of the cleaner body 11 is There is no need to form a pressure sensor storage chamber that is air-tightly isolated from the above-mentioned part.

Further, since the two pressures are guided to the sensor unit 41 by the first pressure pipe 56 and the second pressure pipe 55, it is not necessary to dispose the pressure sensor 42 at the pressure detection point. Therefore, the structure of the cleaner main body 11 and the like can be simplified, the design restrictions are reduced, and the manufacturability is good.

In addition, since the suction side of the dust collecting filter 15 having a large change in negative pressure during cleaning is connected to the compartment 53, the compartment 53 interferes and absorbs a change in the negative pressure on the suction side of the dust collecting filter 15. Thus, frequent changes in the driving state of the electric blower 20 due to frequent changes in the pressure difference can be prevented, and stable cleaning can be performed.

In the above embodiment, two or more pressure sensors 42 may be used to sense a pressure difference between two other points in the air path, for example, the exhaust air path 23 and the negative pressure space 21. .

Next, another embodiment of the present invention will be described with reference to FIGS.

In the second embodiment shown in FIGS. 7 to 9, the first pressure pipe mounting portion 43 of the pressure sensor 42 of the first embodiment shown in FIGS. 1 to 6 is located on the side opposite to the control circuit board 40. The pressure sensor 42 is attached to the control circuit board 40 so as to face.

That is, the first pressure pipe mounting portion 43 protrudes outside the pressure partition 51 through the through hole 71 formed in the upper surface of the pressure partition 51 in the drawing. In addition, these pressure bulkheads 51 and the first
A gap portion between the pressure tube mounting portion 43 and the pressure tube mounting portion 43 is airtightly closed by an airtight holding member 72. In the vicinity of the through hole 71 in the upper surface of the pressure partition 51 in the figure, a second pressure pipe mounting portion 54 communicating with the compartment 53 is provided in substantially the same direction as the first pressure pipe mounting portion 43 of the pressure sensor 42. It is formed to protrude.

According to the configuration of the second embodiment shown in FIGS. 7 to 9, the first pressure pipe mounting portion 43 of the pressure sensor 42 projects from the back surface of the control circuit board 40 on which the conductive pattern 47 is formed. The first pressure pipe mounting part
There is no need to form a through hole 49 into which the 43 is inserted, and when soldering to the control circuit board 40, soldering by an automatic soldering tank becomes possible, and productivity can be improved. further,
The two first pressure tubes 56 and the second
Of the first pressure pipe 56 and the second pressure pipe 55 can be easily arranged at the time of piping, the piping space can be saved, and the assembling workability is improved. it can.

Next, still another embodiment of the present invention will be described with reference to FIG.

The third embodiment shown in FIG. 10 is similar to the first embodiment shown in FIGS. 1 to 6 and the second embodiment shown in FIGS. 7 to 9.
The pressure bulkhead 51 of the embodiment has a screw 75 and a nut on the control circuit board 40 via an airtight holding member 74 made of an elastic material such as rubber.
It is screwed by 76.

Then, according to the configuration of the third embodiment shown in FIG. 10, the attachment of the pressure bulkhead 51 to the control circuit board 40 becomes reliable. Since the airtight holding member 74 between the pressure bulkhead 51 and the control circuit board 40 is tightened and compressed by the screws 75 and the nuts 76, the airtightness between the pressure bulkhead 51 and the control circuit board 40 is ensured. It can be held and high pressure can be sensed reliably.

Next, still another embodiment of the present invention will be described with reference to FIG.

The fourth embodiment shown in FIG. 11 is different from the first embodiment shown in FIGS. 1 to 6, the second embodiment shown in FIGS. 7 to 9, and the third embodiment shown in FIG. The pressure bulkhead 51 is bonded to the control circuit board 40 by an adhesive 78 that also functions as an airtight holding member for maintaining airtightness between the pressure bulkhead 51 and the control circuit board 40.
Is fixedly bonded.

According to the configuration of the fourth embodiment shown in FIG.
Compared with the third embodiment shown in FIG. 10, the number of parts can be reduced, assembling becomes easier, and productivity can be improved.

Next, still another embodiment of the present invention will be described with reference to FIG.

The fifth embodiment shown in FIG. 12 includes the first embodiment shown in FIGS. 1 to 6, the second embodiment shown in FIGS. 7 to 9, the third embodiment shown in FIG. A fixed resistor 58 and a capacitor 80, which are electronic components that form a control circuit 61 in addition to the pressure sensor 42 on the control circuit board 40 located inside the pressure bulkhead 51 of the fourth embodiment shown in FIG. Is attached.

According to the configuration of the fifth embodiment shown in FIG. 12, the volume of the pressure bulkhead 51, that is, the volume of the compartment 53 surrounded by the pressure bulkhead 51 and the control circuit board 40 is arbitrarily set on the control circuit board 40. The pressure bulkhead 51 can be set efficiently and without wasting the space above the control circuit board 40.
The internal volume can be increased. When the volume inside the pressure partition wall 51 is increased in this way, the volume of the compartment 53 having an interference action is increased, and the interference action of the compartment 53 is increased, so that an excessive reaction of the pressure sensor 42 can be prevented. Also,
Although it is easy to arbitrarily set the volume in the pressure partition wall 51 as described above, the responsiveness of the pressure sensor can be adjusted by adjusting this volume.

That is, as in the first embodiment shown in FIGS. 1 to 6, only the pressure sensor 42 is mounted on the control circuit board 40 in the pressure bulkhead 51, and is surrounded by the pressure bulkhead 51 and the control circuit board 40. If the volume of the compartment 53 is made as small as possible, the responsiveness of the pressure sensor 42 can be improved, and a minute change in pressure can be sensed.

Next, still another embodiment of the present invention will be described with reference to FIG. 13 of the embodiment.

The sixth embodiment shown in FIG. 13 corresponds to the second pressure pipe mounting portion 54 of the pressure bulkhead 51 of the first embodiment shown in FIGS.
Are provided so as to protrude from the surface of the pressure partition wall 51 perpendicular to the control circuit board 40 to the right horizontal direction in the drawing, which is a direction parallel to the control circuit board 40.

According to the configuration of the sixth embodiment shown in FIG. 13, the space in the height direction on the control circuit board 40 can be adjusted, and the control circuit board 40 can be easily incorporated into the cleaner body 11. Further, the arrangement of the second pressure pipe 55 is facilitated, and the second pressure pipe 55 can be prevented from being broken and closed.

(Effect of the Invention) According to the vacuum cleaner of the first aspect, the compartment is formed airtight by the pressure partition wall and the substrate and communicates with the suction side of the dust collection filter through the second pressure pipe mounting portion. In order to locate the pressure sensor having the first pressure pipe mounting portion communicating with the exhaust side of the dust collection filter, the suction side and the exhaust side of the dust collection filter in the air passage in the vacuum cleaner main body are arranged with one pressure sensor. The difference between the pressures at the two locations on the side can be easily detected, and the electric blower can be more appropriately controlled according to the condition of the surface to be cleaned and the condition of clogging of the dust collecting filter. In addition, since the intake side of the dust collection filter, which tends to change in pressure, communicates with the compartment to interfere with each other, it is possible to stably drive and control the electric blower. In addition, there is no need to form a pressure sensor storage chamber in the vacuum cleaner main body that is airtightly isolated from other parts, and the pressure at the two locations is guided by a pressure pipe or the like. Since there is no need to provide such a structure, it is possible to simplify the structure of the main body of the vacuum cleaner and the like, irrespective of the location of the substrate, to reduce restrictions in design, and to improve manufacturability.

According to the vacuum cleaner of the second aspect, in addition to the effect of the vacuum cleaner of the first aspect, the first pressure pipe mounting portion of the pressure sensor and the second pressure pipe mounting portion of the pressure bulkhead are connected to the pressure bulkhead. Since the first pressure tube mounting portion of the pressure sensor does not penetrate the substrate because it is located on the same surface, the configuration of the substrate can be simplified,
For example, when soldering, soldering by an automatic soldering tank becomes possible, and piping of pressure pipes respectively connected to the first pressure pipe mounting part and the second pressure pipe mounting part can be easily performed. Performance and piping space can be saved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a sensor section showing a first embodiment of the vacuum cleaner of the present invention, FIG. 2 is a perspective view of the sensor section, and FIG.
Fig. 4 is a perspective view of the same pressure sensor, Fig. 4 is a plan view of the same vacuum cleaner with a part cut away, Fig. 5 is a perspective view of the whole of the same, Fig. 6 is a block diagram of the same, and Fig. 7 is a book. FIG. 8 is a cross-sectional view of a sensor unit according to a second embodiment of the present invention, FIG. 8 is a perspective view of the sensor unit, FIG.
FIG. 3 is a sectional view of a sensor unit according to a third embodiment of the present invention.
FIG. 11 is a sectional view of a sensor unit according to a fourth embodiment of the present invention,
FIG. 12 is a sectional view of a sensor section showing a fifth embodiment of the present invention, FIG. 13 is a sectional view of a sensor section showing a sixth embodiment of the present invention, and FIG. 14 is an example of a conventional vacuum cleaner. FIG. 15 is a sectional view of the sensor unit shown in FIG. 15, FIG. 15 is a perspective view of the sensor unit, and FIG. 16 is a perspective view of a pressure sensor. 11 Vacuum cleaner body, 14 Dust collection chamber, 15 Dust collection filter, 20 Electric blower, 21 Negative pressure space as intake air path that is the air path on the intake side, 23 ... Exhaust air path which is an air path on the exhaust side, 40 ... board, 41 ... sensor part, 42 ... pressure sensor, 43 ... first pressure pipe mounting part, 45 ... terminal part, 51
... Pressure partition wall, 53... Compartment, 54... Second pressure tube mounting portion, 57... Electronic component IC, 58... Electronic component fixed resistor, 59. Fixed resistor, 61 ……
Control circuit, 80 ... Capacitors that are electronic components.

Claims (2)

(57) [Claims] An electric blower provided in a cleaner body, a dust collecting chamber having a dust collecting filter communicating with an intake side of the electric blower, a control circuit for controlling rotation of the electric blower, and the dust collecting device. A sensor unit that senses pressures on an intake side and an exhaust side of the filter, respectively, and outputs an electric signal corresponding to a difference between the sensed pressures to the control circuit, wherein the sensor unit includes the control circuit A first pressure tube mounting portion and a terminal portion, which are provided on a substrate on which the electronic components forming the device are mounted and to which the pressure tube is mounted, and which is connected to the pressure guided to the first pressure tube mounting portion and the surroundings. A pressure sensor for outputting a relative pressure with respect to the pressure as an electric signal from the terminal portion; and a second pressure pipe attachment disposed on the substrate so as to cover the pressure sensor and to which a pressure pipe is attached. And a pressure partition wall that incorporates the pressure sensor together with the substrate and forms a compartment that is airtightly isolated from the outside, and the first pressure pipe mounting portion is on the exhaust side of the dust collection filter. An electric vacuum cleaner, wherein the second pressure pipe mounting portion is communicated with the suction side of the dust collection filter. 2. A sensor unit comprising a first pressure pipe mounting part and a second pressure pipe mounting part.
The vacuum cleaner according to claim 1, wherein the pressure pipe mounting portion is located on the same surface of the pressure bulkhead.