JP2013036722A - Range hood and mounting device of proximity switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a range hood capable of correctly detecting that a straightening vane is removed without malfunctioning by a proximity switch.SOLUTION: The proximity switch is made by mounting a magnet part 8 on the straightening vane. By forming an opening 74 larger than a lead switch part 7 in a hood and by forming a space in the peripheral part of the lead switch part 7 by isolating the inner peripheral face of the opening 74 and the outer peripheral face of the lead switch part 7, the peripheral part of the lead switch part 7 is not magnetized by the magnetic force of the magnet part 8 even the hood is made of a ferromagnetic material having a large magnetic susceptibility. By not making the proximity switch malfunction by the lead switch part 7 normally performing ON. OFF operations when the magnet part 8 is separated from the lead switch part 7, the hood can be made with a steel plate at a low cost, and the range hood can accurately detect that the straightening vane is removed without malfunctioning by the proximity switch.

Description

  The present invention relates to a range hood that is installed around cooking utensils and collects cooking gas such as oily smoke generated by cooking and exhausts it to the outside.

In recent years, it has changed to a propeller type ventilation fan as a kitchen ventilation device, and cooking gas such as oily smoke generated by cooking placed around cooking utensils is collected inside the hood by a built-in blower and exhausted outdoors etc. A range hood has been proposed that blows air purified by various filters into the room.
For example, as disclosed in Patent Document 1, a rectifying plate is provided on a hood provided with a blower, and cooking gas such as oily smoke is sucked and collected through a gap between the inner surface of the hood and the rectifying plate, and is exhausted outdoors. A range hood has been proposed.

Japanese Patent No. 4409711

In the conventional range hood described above, oil stains such as oil and fat in cooking gas adhere to the inside of the hood and the fan of the blower, so that the inside of the hood may be manually cleaned by a person.
In the case of the range hood in which the fan of the blower described above can be taken out from the inside of the hood, not only the inside of the hood but also the fan of the blower may be removed and taken out from the inside of the hood for cleaning.
In addition, with the spread of face-to-face kitchens and island-type kitchens, the living room and kitchen are often laid out in series, so oil stains are attached to the inside of the hood of the range hood and the fan of the blower. Then, the opportunity to clean the inside of the hood of the range hood and take out the fan of the blower from the inside of the hood from the badness that the smell of oil is transmitted to the living side is increasing.
In the above-described conventional range hood, the rectifying plate is removed and the inside of the hood is cleaned by wiping with a hand, or the fan of the blower is removed from the inside of the hood and washed with a sink or the like. Since this range hood is equipped with a filter, remove the filter along with the current plate and clean it, or take out the fan.
However, as described above, when cleaning the inside of the hood or taking out the fan of the blower, if the blower is operating, human hands may touch the rotating fan, so clean the inside of the hood. When the fan is taken out, the blower is stopped by an operation such as unplugging the outlet. However, there is a possibility that danger may arise if the fan is forgotten.

Therefore, in view of the above problems, the present applicant is provided with a switch for detecting that the current plate is removed from the hood, and when the switch detects removal of the current plate, it can energize the motor that rotates the fan of the blower. In addition, a range hood was proposed in which the fan stopped when the current plate was removed while the fan of the blower was rotating.
If this range hood is used, the fan will stop if the rectifier plate is removed for the purpose of forgetting to stop the blower and cleaning the inside of the hood or taking out the fan, so there is no danger.

The present applicant uses a proximity switch having a magnet part and a reed switch part as the switch described above, and attaches the reed switch part to the hood, attaches the magnet part to the rectifying plate, and attaches the rectifying plate to the reed switch part. And the magnet switch are close to each other and the reed switch is turned on. When the rectifying plate is removed, the reed switch is separated from the magnet and the reed switch is turned off. Detecting the removal.
As described above, the proximity switch sometimes malfunctions without the reed switch unit normally turning on and off.
As a result of investigating the cause of malfunction of the proximity switch described above, the present applicant was as follows.
The reed switch section of the proximity switch described above is turned on and off by detecting a change in the magnetic field. On the other hand, the hood described above is made of a steel plate in order to reduce the cost, and the steel plate is a ferromagnetic material having a large magnetic susceptibility.
For this purpose, when the rectifying plate is attached to the hood and the magnet part is close to the reed switch part, the peripheral part of the reed switch part of the hood is magnetized by the magnetic force of the magnet part, and the rectifying plate is removed and the magnet part is reed switch Even if it is away from the part, the peripheral part of the reed switch part of the hood maintains a magnetized state, and a magnetic field is generated in the peripheral part of the reed switch part of the hood. It may not be.

  As described above, when the present applicant uses a proximity switch having a magnet portion and a reed switch portion for a range hood made of a ferromagnetic material having a large magnetic susceptibility such as a steel plate, the reed switch portion is normally used. It has been found that the proximity switch may malfunction without being turned ON and OFF, and has reached the present invention.

  It is an object of the present invention to accurately detect that a protective member has been removed in a range hood made of a ferromagnetic steel plate having a high magnetic susceptibility without malfunction by a proximity switch having a magnet part and a reed switch part. The range hood and the proximity switch mounting device are as described above.

The range hood of the present invention includes a hood 1 and a blower 4, and a protective member 5 is attached to the hood 1 to prevent a human hand from entering a suction port 41 of the blower 4. A proximity hood 6 that detects the removal of the hood 1, and at least a portion of the hood 1 facing the protective member 5 is a range hood made of a ferromagnetic material having a high magnetic susceptibility,
The proximity switch 6 has a reed switch portion 7 attached to the hood 1 and a magnet portion 8 attached to the protective member 5. When the protective member 5 is attached to the hood 1, the magnet portion 8 becomes the reed switch portion 7. When the protective member 5 is removed from the hood 1, the reed switch unit 7 is operated by moving the magnet unit 8 away from the reed switch unit 7.
The range hood is configured such that a ferromagnetic material having a high magnetic susceptibility does not exist in a peripheral portion of the reed switch unit 7 in the hood 1.

  In the range hood of the present invention, the opening 74 is formed in the portion of the hood 1 facing the magnet portion 8, and the reed switch portion 7 smaller than the opening 74 is made of a material having a small magnetic susceptibility and weak magnetism. The attachment member 75 can be attached to the hood 1 so that the inner peripheral surface of the opening 74 and the outer peripheral surface of the reed switch unit 7 are separated from each other.

In this way, since there is no ferromagnetic material having a high magnetic susceptibility between the inner peripheral surface of the opening 74 of the hood 1 and the outer peripheral surface of the reed switch unit 7, the lead is generated by the magnetic force of the magnet unit 8. The peripheral part of the switch part 7 is not magnetized, and when the magnet part 8 is separated from the reed switch part 7, there is no magnetic field in the peripheral part of the reed switch part 7, and the reed switch part 7 operates normally on and off, The proximity switch 6 does not malfunction.
Accordingly, the proximity switch 6 can accurately detect that the protective member 5 has been removed from the hood 1.

  In the range hood of the present invention, the opening 74 of the hood 1 can be closed with a plate 76 made of a material having a low magnetic susceptibility and weak magnetism, and the reed switch unit 7 can be attached to the plate 76.

If it does in this way, an inner side will not be visible from the opening part 74 in the state which removed the protection member 5. FIG.
Moreover, cooking gas such as oil smoke sucked in by the blower 4 when the range hood is operating does not flow into the inside through the opening 74.

  In the range hood of the present invention, the magnet portion 8 is smaller than the size of the opening 74, and the magnet portion 8 can be positioned within the range of the opening 74 in a state where the protective member 5 is attached to the hood 1. .

  In this way, since the magnetic force of the magnet portion 8 is difficult to be transmitted to the peripheral portion of the opening portion 74 of the hood 1 with the protective member 5 attached to the hood 1, the peripheral portion of the opening portion 74 of the hood 1 is difficult to be magnetized. When the protective member 5 is removed from the hood 1, the reed switch unit 7 operates more reliably on and off.

In the range hood of the present invention, the protective member 5 is made of a ferromagnetic material having a large magnetic susceptibility,
The magnet portion 8 can be attached to the protective member 5 via a magnet attachment member 83 made of a material having a low magnetic susceptibility and weak magnetism.

  If it does in this way, while being able to manufacture the protection member 5 with a steel plate cheaply, the magnetic force of the magnet part 8 will not be transmitted to the protection member 5, but the proximity switch 6 will operate | move normally over a long period of time.

  In the range hood of the present invention, it is possible to prevent the motor 4c of the blower 4 from being energized by detecting the removal of the protective member 5 of the proximity switch 6.

  In this way, by removing the protective member 5, the motor 4c is no longer energized and the rotating fan 4b stops, so there is a danger even if the forgery operation of the blower 4 is forgotten and cleaning work is performed. There is no.

In the proximity switch mounting device of the present invention, the reed switch unit 7 is mounted on a fixed member made of a ferromagnetic material having a high magnetic susceptibility, the magnet unit 8 is mounted on the movable member, and the movable member approaches the fixed member. A proximity switch mounting device in which the reed switch unit 7 operates by being separated,
The proximity switch mounting device is characterized in that the ferromagnetic material having a large magnetic susceptibility does not exist in a peripheral portion of the reed switch portion 7 in the fixing member.

According to the range hood of the present invention, in the range hood having the hood 1 made of a ferromagnetic material having a high magnetic susceptibility, the protection member 5 is removed and the proximity provided with the magnet portion 8 and the reed switch portion 7 The switch 6 can accurately detect without malfunction.
Moreover, since the hood 1 can be manufactured using an inexpensive steel plate, the hood 1 can be made inexpensive.

  According to the proximity switch mounting device of the present invention, when the movable member approaches and separates from the fixed member, the reed switch unit 7 normally operates on and off, and the proximity switch 6 does not malfunction.

It is a longitudinal cross-sectional view of the range hood which shows the 1st Embodiment of this invention. It is AA sectional drawing of FIG. It is an enlarged view of the proximity switch attachment part of FIG. It is BB sectional drawing of FIG. It is a front view of the attaching part of the reed switch part of FIG. It is a motor drive circuit diagram. It is sectional drawing of the proximity switch attachment part which shows the 2nd Embodiment of this invention.

A first embodiment of the present invention will be described with reference to FIGS.
The hood 1 includes a hood main body 1 a and a blower housing 1 b, and the hood main body 1 a has an outer shell 2 and an inner shell 3.
The outer shell 2 has a box shape in which the lower surface is opened by the upper surface plate 20 and the peripheral surface plate 21, and an opening 22 is formed in the upper surface plate 20. A flange 23 is provided.
The inner shell 3 is shaped like a downward plate with the upper surface plate 30 and the peripheral surface plate 31, and a cylindrical body 33 is provided at the periphery of the hole 32 of the upper surface plate 30, and outward at the lower end of the peripheral surface of the peripheral surface plate 31. A mounting flange 34 is provided.
The cylindrical body 33 of the inner shell 3 is fitted into the opening 22 of the outer shell 2, and the mounting flange 34 is detachably connected to the mounting flange 23 to connect the outer shell 2 and the inner shell 3 to form the hood main body 1a. is there.
The lower surface of the inner shell 3 is the inside of the hood 1.

The blower housing 1b has a box shape having an inlet side opening 24 and an outlet side opening 25, and the blower 4 is provided therein.
The blower housing 1b is attached to the upper surface plate 20 of the outer shell 2 so that the inlet side opening 24 is fitted into the cylinder 33.

The blower 4 is provided with a fan 4b in a casing 4a and rotationally drives the fan 4b by a motor 4c provided in the casing 4a.
A discharge portion 40 communicating with the casing 4a is fitted into the outlet side opening 25, and a suction port 41 formed in the casing 4a communicates with the cylindrical body 33 (hole 32), from the cylindrical body 33 to the suction port 41. The rotary shaft 43 of the motor 4c and the fan 4b can be separated by putting the hand in and loosening the lock member 42, and the rotary shaft 43 of the motor 4c and the fan 4b can be connected by tightening the lock member 42.
Thus, the fan 4b of the blower 4 can be easily taken out from the hood 1 from the hood 1.

The hood 1, for example, the inner shell 3 of the hood main body 1 a, faces the suction port 41 of the blower 4 at a distance from each other and prevents a human hand from entering the suction port 41, for example, rectification A plate 50 is removably attached.
A proximity switch 6 is attached across the current plate 50 and the hood 1 (inner shell 3). For example, the reed switch unit 7 is attached to the hood 1 (inner shell 3) that is a fixed member, and the magnet unit 8 is attached to the rectifying plate 50 that is a movable member to form the proximity switch 6.
When the rectifying plate 5 is attached to the hood 1, the magnet portion 8 approaches or contacts the reed switch portion 7 and the reed switch portion 7 is turned on. When the rectifying plate 5 is removed from the hood 1, the magnet portion 8 is lead. The reed switch unit 7 is turned off away from the switch unit 7, and it is detected that the rectifying plate 50 has been removed by the ON / OFF operation of the reed switch unit 7.

When the reed switch unit 7 is ON, the operation switch 9 can be operated to control the energization of the motor 4c of the blower 4 as usual.
When the reed switch unit 7 is OFF, the motor 4c of the blower 4 cannot be energized regardless of the operation of the operation switch 9.
The operation switch 9 is attached to the front surface of the hood 1, for example, the peripheral plate 21 of the outer shell 2 of the hood main body 1a.

Since it is like this, the fan 4 can be driven and stopped by operating the operation switch 9 in the state where the current plate 50 is attached, and the range hood can be operated as usual.
Further, since the fan 4b of the blower 4 stops regardless of the operation switch 9 when the rectifying plate 50 is removed, it is not dangerous to touch the fan 4b when cleaning the inside of the hood 1 with a human hand. There is no danger when taking out the hood 1 from the inside of the hood 1, and no danger arises if the operation of stopping the blower 4 is forgotten during these operations.
Moreover, even if the operation switch 9 is accidentally touched during the above-described operation, the fan 4b of the blower 4 does not rotate and no danger arises.

The attachment of the current plate 50 will be described.
The rectifying plate 50 has a shape in which a rising piece 52 is provided on the periphery of a flat plate 51, and a support shaft 53 is provided laterally on a rear side 52 a of the rising piece 52.
A support piece 54 is attached to the rear side 31 a of the peripheral surface plate 31 of the inner shell 3, and the support shaft 53 is supported at the front end portion of the support piece 54 so as to be rotatable in the vertical direction and detachable. is there.
Thereby, the rectifying plate 50 is rotated downward from the attachment posture shown in FIG. 1 to a downward posture, and the rectifying plate 50 can be removed by removing the support shaft 53 from the tip end portion of the support piece 54.

  Support members 35 are provided on both the left and right sides of the upper surface plate 30 of the inner shell 3 near the front, and supported members 55 are provided on the left and right sides of the rectifying plate 50 near the front of the flat plate 51. By supporting the member 55 with the support member 35, the rectifying plate 50 is supported in the mounting posture, and by releasing the support, the rectifying plate 50 can be rotated in the downward posture.

The support member 35 includes a bracket 35a, a support pin 35b provided on the bracket 35a, a spring case 35c, and a spring 35d provided between the spring case 35c and the support pin 35b. The support pin 35b is a spring. It is held at the support position by 35d.
The supported member 55 is formed by forming a support hole 55b in the bracket 55a, and the support pin 35b is pushed by the bracket 55a by rotating the current plate 50 from the downward posture toward the attachment posture. Is fitted into the support hole 55b, so that the supported member 55 is supported by the support member 35 and supported in the mounting posture. By pushing the support pin 35b against the spring 35d and withdrawing it from the support hole 55b, the support of the supported member 55 is released, and it can be rotated downward.

FIG. 1 schematically shows a proximity switch 6, and the installation of the proximity switch 6 will be described in detail with reference to FIGS. 3 to 5.
The reed switch unit 7 covers the switch unit 70 with a covering material 71, and the switch unit 70 is turned on when the magnet unit 8 comes close to the front surface 70a of the switch unit 70, and is turned off when the magnet unit 8 is separated.
The covering material 71 projects rearward from the switch portion 70 and has an attachment piece 72, which is fixed to an attachment member 75 described later with an attachment tool 73.
An opening 74 is formed on the rear side 31a of the peripheral surface plate 31 of the inner shell 3 so as to communicate the outer surface and the inner surface thereof.
The size of the opening 74 is larger than the size of the front surface 7a of the reed switch unit 7 (the front surface of the covering material 71).
The reed switch portion 7 is attached to the rear side 31a of the peripheral surface plate 31 of the inner shell 3 via an attachment member 75, and the reed switch portion 7 (front surface 7a portion) is located at the approximate center of the opening 74. The outer peripheral surface 7b of the reed switch unit 7 is separated from the inner peripheral surface 74a of the opening 74, and an annular space is formed between them.
The attachment member 75 is made of a material having a low magnetic susceptibility and a weak magnetic property, such as aluminum, stainless steel, or resin. In this embodiment, it is made of a stainless steel plate (SUS304).

Because of this, there is no ferromagnetic material having a large magnetic susceptibility in the peripheral portion of the reed switch unit 7.
Therefore, when the rectifying plate 50 is installed, the peripheral portion of the reed switch portion 7 is not magnetized by the magnetic force of the magnet portion 8, and when the rectifying plate 50 is removed, the peripheral portion of the reed switch portion 7 is not magnetized. Since the magnetic field immediately disappears and the reed switch unit 7 is immediately turned off, the reed switch unit 7 is normally turned on and off, and the proximity switch 6 does not malfunction.

In this embodiment, the opening 74 is closed by the plate 76 so that the inside of the inner shell 3 cannot be seen from the opening 74 with the rectifying plate 50 removed. The cooking gas such as sucked oil smoke is prevented from flowing between the inner shell 3 and the outer shell 2 from the opening 74. The mounting member 75 is attached to the inner surface of the plate 76.
The plate 76 is made of a material with a low magnetic susceptibility, such as aluminum, stainless steel, or resin, like the mounting member 75. In this embodiment, it is made of a stainless steel plate (SUS304).

  The plate 76 has a projecting protrusion 76a having substantially the same size as the opening 74 at the center, and has L-shaped attachment pieces 76b on the left and right edges. The fixing bracket 78 is fixedly attached to the mounting bracket 77 fixed to the inner surface of the side 31a, and the projecting protrusion 76a is fitted in the opening 74 so as to close the opening 74. The outer surface of the rear side 31a and the outer surface of the plate 76 are substantially flush, preferably flush.

By doing in this way, when the opening part 74 part is visually observed in the state where the rectifying plate 50 is removed, the reed switch part 7 cannot be seen, and it looks like a flat surface without irregularities, so that it looks good.
It should be noted that a sheet (label) may be adhered across the peripheral portion of the opening 74 and the protrusion 76a of the plate 76 so that the opening 74 and the protrusion 76a cannot be seen.
In this way, the appearance is further improved, and the maintenance precautions can be described on the sheet to facilitate the maintenance.

The mounting bracket 77 is made of a steel plate like the inner shell 3, and is fixed to the inner surface of the rear side 31a of the peripheral plate 31 by welding, for example, spot welding.
Since it is like this, since there is no fixing tool etc. for attaching the reed switch part 7 to the outer surface of the rear side 31a of the peripheral surface plate 31, the inside of the hood 1 when the rectifying plate 50 is removed (the outer surface of the inner shell 3) Good looking.

The magnet portion 8 is attached to the rear side 52 a of the rising piece 52 of the rectifying plate 50 so that the front surface 8 a faces the front surface 7 a of the reed switch portion 7.
The size of the magnet portion 8 (the size of the front surface 8a portion) is substantially the same as the size of the reed switch portion 7 (the size of the front surface 7a), and the magnet portion 8 is attached with the rectifying plate 50 attached. Is located within the range of the opening 74, preferably approximately at the center of the range of the opening 74, and the peripheral portion of the opening 74 on the rear side 31a of the peripheral plate 31 is magnetized by the magnetic force of the magnet unit 8. Is suppressed.
Therefore, the reed switch unit 7 is more reliably turned on and off in combination with the mounting of the reed switch unit 7 described above.

The magnet portion 8 is obtained by covering a magnet 80 with a covering material 81, and an attachment piece 82 provided on the covering material 81 is fixedly attached to a magnet attachment member 83 with a fixing tool, for example, a bolt / nut 84. The attachment member 83 is fixedly attached to the rear side 52a of the rising piece 52 of the rectifying plate 50 with a fixing tool, for example, a bolt / nut 85.
The magnet mounting member 83 is made of a weak magnetic material having a low magnetic susceptibility, such as aluminum, stainless steel, resin, etc., and the magnetic force of the magnet portion 8 is difficult to be transmitted to the rising piece 52 of the rectifying plate 50 made of a steel plate. Therefore, the magnetic force of the magnet unit 8 does not disappear early, and the proximity switch 6 operates normally over a long period of time.

As shown in FIG. 6, the operation switch 9 includes a strong operation switch 90, a medium operation switch 91, a weak operation switch 92, a turn-off switch 93, a lighting switch 94, and the like, and the strong / medium / weak switches 90, 91, 92 are The power supply 95 and the motor 4c of the blower 4 are intermittently connected. The proximity switch 6 is provided between the power supply 95 and the input side of the strong / medium / weak operation switches 90, 91, 92.
The illumination switch 94 is for energizing the illumination tool 96.
The operation switch that is turned on for the off switch 93 is turned off.
The proximity switch 6 may be provided in a connection circuit between the operation switch and the motor 4c.

As such, when either of the operation switches is ON, that is, when the blower 4 is driven, if the rectifying plate 50 is removed, the proximity switch 6 is turned OFF and the motor 4c is not energized. Stop.
Further, since the proximity switch 6 is OFF when the rectifying plate 50 is removed, none of the operation switches is turned ON to energize the motor 4c, so that the blower 4 is not driven.

In this embodiment, the outer shell 2 and the inner shell 3 of the hood main body 1a and the blower housing 1b are made of a steel plate, but other than the inner shell 3 may be made of a material other than the steel plate. For example, the outer shell 2 and the blower housing 1b may be made of a stainless steel plate, or one of the outer shell 2 and the blower housing 1b may be made of a stainless steel plate, and the other may be made of a steel plate.
That is, at least a portion of the hood 1 facing the protective member 5 (rectifying plate 50) may be a range hood made of a ferromagnetic material having a high magnetic susceptibility, such as a steel plate.

In this embodiment, the hood body 1a and the blower housing 1b are used as the hood 1. However, only the hood body 1a is used as the hood 1, and the discharge portion 40 of the blower 4 is exhausted to the outside through a duct or the like. good.
Moreover, you may comprise the food | hood main body 1a only with the outer shell 2. FIG.

In the above-described embodiment, the smoke or the like that has flowed from the gap between the inner surface of the inner shell 3 (the inner surface of the hood 1) and the rectifying plate 50 is directly sucked into the suction port 41 of the blower 4. A filter may be provided on the upstream side, for example, on the cylindrical body 33.
In this case, the filter is removed and the fan 4b is taken out.

In the above-described embodiment, the plate 76 that closes the opening 74 is attached to the rear side of the peripheral plate 31 via the mounting bracket 77, but the plate 76 may be attached directly to the rear side 31 a of the peripheral plate 31. good.
For example, as shown in FIG. 7, the plate 76 is brought into contact with the periphery of the opening 74 on the inner surface of the rear side 31 a of the peripheral plate 31, and is fixed by a fixing tool, for example, a bolt nut 79.
In this case, like the plate 76, the fixing tool (bolt / nut 79) is desirably made of a material having a low magnetic susceptibility and weak magnetism, such as aluminum, stainless steel, or resin.

In each of the above-described embodiments, the rectifying plate 50 is the protective member 5, but the present invention is not limited to this.
For example, in the case of a range hood in which the hood has a box shape with an open bottom surface and a filter is detachably attached to the inside of the hood to form a fan housing chamber, the filter faces the air inlet of the fan. It becomes a protective member.
Further, in the case of a range hood in which a cover plate having a slit-shaped ventilation opening 57a is detachably attached to the lower opening of the hood, the cover plate is opposed to the blower inlet, and thus serves as a protective member. .

In the above-described embodiment, the motor 4c is not energized by the OFF operation of the proximity switch 6. However, the present invention is not limited to this.
For example, when the motor 4c is energized, the warning plate may be removed and the warning device may be operated to issue a warning when the proximity switch 6 is turned on or off.

In the above description, the proximity switch 6 is attached to the range hood. However, the proximity switch 6 can be applied to other than the range hood.
For example, in a storage body in which a steel plate drawer (movable member) can be freely inserted into and removed from a steel plate main body (fixed member), the lead switch portion is attached to the main body as described above, and the drawn magnet portion is set as described above. The proximity switch can detect that it has been attached, pulled out, and closed.

  DESCRIPTION OF SYMBOLS 1 ... Hood, 3 ... Inner shell, 31 ... Circumferential board, 31a ... Rear side, 4 ... Blower, 4a ... Fan casing, 4b ... Fan, 4c ... Motor, 5 ... Protection member, 6 ... Proximity switch, 7 ... Reed switch Part 8, magnet part 9, operation switch 52, rising piece 52 a, rear side, 74 opening part, 75 attaching member, 76 plate, 83 magnet attaching member.

Claims (7)

Proximity switch that includes a hood 1 and a blower 4, removably attaches a protective member 5 that prevents a human hand from entering the suction port 41 of the blower 4, and detects the removal of the protective member 5. 6 is a range hood made of a ferromagnetic material having a high magnetic susceptibility at least a portion facing the protective member 5 of the hood 1,
The proximity switch 6 has a reed switch portion 7 attached to the hood 1 and a magnet portion 8 attached to the protective member 5. When the protective member 5 is attached to the hood 1, the magnet portion 8 becomes the reed switch portion 7. When the protective member 5 is removed from the hood 1, the reed switch unit 7 is operated by moving the magnet unit 8 away from the reed switch unit 7.
A range hood configured so that a ferromagnetic material having a high magnetic susceptibility does not exist in a peripheral portion of the reed switch unit 7 in the hood 1.   An opening 74 is formed in a portion of the hood 1 facing the magnet portion 8, and the reed switch portion 7 smaller than the opening 74 is connected to the hood via an attachment member 75 made of a material having a small magnetic susceptibility and a weak magnetism. The range hood according to claim 1, wherein the inner peripheral surface of the opening 74 and the outer peripheral surface of the reed switch unit 7 are attached so as to be separated from each other.   The range hood according to claim 2, wherein the opening portion of the hood is closed with a plate made of a material having a low magnetic susceptibility and weak magnetism, and the reed switch portion is attached to the plate.   The range according to claim 2 or 3, wherein the magnet portion (8) is smaller than the size of the opening portion (74), and the magnet portion (8) is positioned within the opening portion (74) with the protective member (5) attached to the hood (1). hood. The protective member 5 is made of a ferromagnetic material having a large magnetic susceptibility,
The range hood according to any one of claims 1 to 4, wherein a magnet portion 8 is attached to the protective member 5 via a magnet attachment member 83 made of a material having a low magnetic susceptibility and weak magnetism.   The range hood according to any one of claims 1 to 5, wherein the motor 4c of the blower 4 is not energized by detecting the removal of the protective member 5 of the proximity switch 6. A reed switch unit 7 is attached to a fixed member made of a ferromagnetic material having a high magnetic susceptibility, and a magnet unit 8 is attached to a movable member. The reed switch unit 7 operates when the movable member approaches and separates from the fixed member. A proximity switch mounting device adapted to
The proximity switch mounting device according to claim 1, wherein the ferromagnetic material having a high magnetic susceptibility is not present in a peripheral portion of the reed switch portion 7 in the fixing member.

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