JP2002357350A - Range hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a range hood capable of satisfactorily collecting gas pro duced upon cooking, not obstructing a cooking person with a hood at the time of cooking, and further reduced in electric power consumption of an electric motor of an air fan. SOLUTION: There are provided a body 1 including a mounting section 1a and a fixed duct section 1b, a movable duct section 2a, a hood elevating apparatus 4 mounted on the mounting section 1a for elevating the hood 2, a human body detector provided in a smoking section 2b, and a controller. The controller controls the operation of the hood elevation apparatus 4 to move the hood 2 upward when a human body detection signal is inputted, and controls the operation of the hood elevating apparatus 4 to move the hood 2 downward when the human body detection signal is not inputted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a range hood for sucking gas such as steam or combustion gas generated during cooking together with air and discharging the gas to the outside.

[0002]

2. Description of the Related Art As an example of a range hood, an air blower and a filter are attached to a hood for collecting gas generated during cooking, and the air generated during cooking is sucked together with air by driving the blower. There is known a device in which oil or the like in a gas that has been trapped is captured by a filter to produce air with a low oil content, and the air is discharged outside through a discharge duct or the like. Also, a centrifugal force type range hood having no filter is known.

[0003]

Generally, the range hood is installed above the range. Also,
The gas generated during cooking rises while diffusing. For this reason, gas generated during cooking can be collected more efficiently as the distance between the range and the hood, that is, the height of the hood is lower.
That is, the amount of gas generated during cooking that can be collected when the suction capacity of the blower is constant is smaller as the hood height is higher, and is larger as the hood height is lower. Therefore, the lower the height of the hood, the more efficiently it can be collected. However, if the height of the food is too low, the food will hinder cooking for the cook. For these reasons, the conventional range hood has been installed at a height such that the hood does not hinder cooking for the cook.

[0004] For this reason, in order to sufficiently collect gas generated during cooking, the conventional range hood has a suction capability of a blower set to a large value corresponding to the height of the hood which does not hinder cooking by a cooker. I have. Therefore, the power consumption of the electric motor of the blower is large, and the operating cost of the range hood is high.

[0005] Also, unlike the range of the gas combustion system,
A range of an electromagnetic induction heating system is known. Since this range does not generate combustion gas, the upward flow of gas generated during cooking is not promoted by the combustion gas. Therefore, the range hood used for the above-mentioned range needs to have a larger suction capacity of the blower than the range hood used for the gas-fired range. On the other hand, houses in recent years have a tendency to be highly airtight and highly insulated.

For this reason, if an electromagnetic induction heating range is used in a highly airtight house, a range hood having a blower having a large suction capacity as described above is required. Therefore, when the range hood is driven, a large amount of indoor air is exhausted to the outside together with gas generated during cooking, and the interior of the room may be at a negative pressure.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to allow a gas generated at the time of cooking to be sufficiently collected, and that a food does not hinder cooking by a person who cooks. An object of the present invention is to provide a range hood which consumes less power of an electric motor of a blower and has a low operating cost.

[0008]

According to a first aspect of the present invention, a main body 1 is provided.
A hood 2 that moves up and down with respect to the main body 1 between an upper position and a lower position; a blower 3 that sucks gas generated during cooking together with air through the hood 2 and discharges the gas to the outside; A hood lifting device 4
A human body detecting means for detecting that a person has approached the hood 2 and outputting a human body detection signal; and controlling the operation of the hood elevating device 4 based on the human body detection signal. Is a range hood provided with a controller that sets the hood 2 to an upper position and a hood 2 to a lower position when a person is not detected.

According to the second invention, the suction capacity of the blower 3 in the first invention is increased when the hood 2 is at the upper position.
This is a range hood that is reduced when the hood 2 is at the lower position.

According to a third aspect of the present invention, in the first or second aspect, the hood lifting device 4 includes an electric motor 4a for moving the hood 2 to an upper position and a lower position, and a force for moving the hood 2 by the electric motor 4a. Is a range hood provided with a rotational force limiting mechanism 4d for limiting the maximum value of.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the invention, the hood 2 includes a cover body 8, and the cover body 8 closes the opening 25 on the lower surface of the hood 2, 25 is a range hood that moves over a position where 25 is opened.

According to a fifth aspect, in the fourth aspect, the cover body 8 is moved to a closed position and an open position by the electric motor 41,
The electric motor 41 is driven and controlled in synchronization with the blower 3 so that the cover 8 is in the open position during the range hood operation.
This is a range hood in which the cover body 8 moves to the closed position when the range hood is stopped.

[0013]

According to the first invention, when there is a person near the hood 2, the hood 2 moves to the upper position, and the hood 2 does not hinder the cooking for the cook. When there is no person near the hood 2, the hood 2 moves to a lower position and can collect a large amount of gas generated during cooking. Therefore, when the cook approaches the range and cooks, the food 2 does not hinder cooking for the cook. When the cooker leaves the stove during cooking, the hood 2 moves to the lower position, and a large amount of gas generated during cooking can be collected.
Even if the suction capacity of the blower 3 is small, gas generated during cooking can be sufficiently collected.

According to the second aspect, the gas generated during cooking can be sufficiently collected regardless of whether the hood 2 is at the upper position or the lower position.

According to the third aspect of the present invention, when the hood 2 is moving, the movement of the hood 2 is hindered by a human hand intentionally or accidentally touching the hood 2.
When the force for moving the hood 2 exceeds the maximum value, the torque of the electric motor 4a is not transmitted by the torque limiting mechanism 4d, and the hood 2 does not move.

According to the fourth aspect, since the opening 25 of the hood 2 is opened by moving the cover body 8 to the open position, the gas generated during cooking can be discharged outdoors by driving the blower 3. . Since the opening 25 of the hood 2 is closed by moving the cover 8 to the closed position, the inside of the hood such as the inner surface of the hood 2 cannot be seen. Therefore, the inside of the hood 2 in an unsightly state to which oil or the like adheres is not visible, so that the appearance is good. In addition, the hood 2 and the cover body 8 are integrated and have a clean appearance, and there is a sense of cleanliness.

According to the fifth aspect of the present invention, the cover 8 is in the open position when the range hood is used, and is in the closed position when the range hood is not used. Moving operation is unnecessary.

[0018]

1 and 2 show one embodiment of a range hood. 1 is a side view, and FIG. 2 is a front view. A main body 1 and a hood 2 that moves up and down with respect to the main body 1
And a blower 3 attached to the main body 1, a hood elevating device 4 attached to the main body 1, and a human body detecting means, for example, a human body detector 5 attached to the hood 2.

The main body 1 has a mounting portion 1a mounted on a wall A of a building, and a fixed duct portion 1b fixed to a front surface of the mounting portion 1a near an upper portion. The hood 2 includes a movable duct portion 2a and a smoke absorbing portion 2b, and the smoke absorbing portion 2b has an opening on a lower surface. The movable duct 2a is inserted into the fixed duct 1b so as to be vertically movable. The smoke suction section 2b is located above the range B. The blower 3 is mounted above the fixed duct 1b. By driving the blower 3, the gas generated during cooking is removed from the smoke absorbing section 2.
b, suction through the movable duct section 2a and the fixed duct section 1a, and discharge outside through a duct (not shown) or the like.

The hood elevating device 4 includes an electric motor 4a
Drives the drum 4b, and the rope 4c wound around the drum 4b is connected to the intake section 2b. When the electric motor 4a is driven and the cable 4c is wound by the drum 4b, the hood 2 rises, and when the cable 4c is paid out, the hood 2 moves down.

The human body detector 5 includes a light projector 5a and a light receiver 5b, and outputs a human body detection signal when a person enters a region surrounded by broken lines a and b in FIGS. As shown by virtual lines in FIGS. 1 and 2, a mat switch 6 may be provided on the floor C to serve as a human body detecting unit. That is, the human body detecting means may be any device that detects that a person has approached the hood 2 (range B) and outputs a human body detection signal.

The aforementioned human body detection signal is input to the controller 7 as shown in FIG. The controller 7 receives a range hood operation signal, a range hood stop signal, and the like. When a range hood operation signal is input to the controller 7, that is, when a human body detection signal is input during the range hood operation, a rising signal is output to the electric motor 4a of the hood elevating device 4 and the hood 2 is output. Is the upper position shown by the solid line in FIG. The upper position is, for example, a height at which the food does not hinder cooking for the cook. In the above-described state, when the human body detection signal is no longer input to the controller 7, a lowering signal is output to the electric motor 4a of the hood elevating device 4, and the hood 2
Is a lower position indicated by a virtual line in FIG. When the range hood stop signal is input, the hood 2 is set to the upper position as described above.

Thus, if the cooker leaves microwave oven B while cooking while driving the microwave oven hood, for example, if he is cooking with a pot in microwave oven B, The hood 2 is at the lower position. Therefore, a large amount of gas generated during cooking can be collected, and the blower 3
The gas generated during cooking can be sufficiently collected even if the suction capacity of the is small. Further, when a cook approaches the range B during the operation of the range hood, the hood 2 is at the upper position. At this time, the suction capacity of the blower 2 may be increased so that a large amount of gas generated during cooking can be collected. Therefore, the food 2 does not hinder cooking for the person who cooks.

The hood 2 is used when a human body detection signal is not input during the operation of the range hood and the stop of the range hood.
That is, the position may be set to the lower position when a person does not approach the hood 2, and may be set to the upper position when a human body detection signal is input, that is, when the person approaches the hood 2. Also, when a flame is generated during cooking, for example, when a person who cooks while cooking the tempura leaves the stove and the hood 2 is at the lower position, the oil ignites,
When a flame is generated, the sensor detects the flame and the hood 2 can be moved upward by the detection signal. For example, a sensor for detecting the temperature between the range B and the hood 2 is provided. It is assumed that a flame has occurred when the temperature detected by this sensor is higher than the set temperature. As described above, by moving the hood 2 upward when a flame is generated, the Entz effect by the hood 2 is reduced, and the flame is easily digested. At this time, the flame can be more easily digested by stopping the blower 3.

In this embodiment, the hood 2 has a cover 8. The cover body 8 has an open position for opening the opening of the smoke absorbing section 2b as shown by the imaginary line in FIG. 1, for example, a substantially vertical posture continuous with the rear edge of the opening, and a solid line in FIG. As shown in the drawing, it is movable, for example, up and down, freely over a closed position for closing the opening of the smoke absorbing section 2b, for example, a substantially horizontal sideways posture. The cover body 8 is not rotated vertically but horizontally (closed position) and vertically (opened position).
May be slid across. The cover 8 is turned up and down by an electric motor as described later, but may be turned manually. Alternatively, the cover body 8 may be divided into a plurality of cover bodies instead of being integrated, and the opening of the smoke absorbing section 2b may be closed when each cover body is at the closed position. For example, it is attached to the lower part of the periphery of the opening of the smoke absorption part 2b so as to be vertically rotatable.

When the range hood is not used (when not used)
In FIG. 1, the cover 8 is set to the horizontal position (closed position) as shown by the solid line in FIG. 1 to close the opening (hood opening) of the smoke absorbing section 2b. In this state, the hood 2 and the cover body 8 have an appearance as if the clams were closed. As a result, the inner surface (the inside of the hood) of the smoke absorbing section 2b to which the oil content in the gas generated during cooking has adhered cannot be seen. In addition, the smoke absorbing portion 2b and the cover body 8 are integrated, and the appearance is clean and there is also a sense of cleanliness.

When the range hood is used (when used), the cover 8 is set to the vertical position (open position) as shown by the imaginary line in FIG. 1, and the opening of the smoke absorbing section 2b is opened. Approaches wall A. Thereby, the gas generated at the time of cooking by driving the blower 3 can be collected and discharged outside. In addition, since the cover body 8 has a function as a guide for the combustion gas and the rising airflow, the gas generated during cooking can be efficiently collected, and the smooth rise of the combustion gas is assisted.

Next, an example of the specific shape of each part will be described. As shown in FIGS. 4 and 5, the mounting portion 1a of the main body 1 has a substantially rectangular box shape, and the vertical guide rails 11 are mounted on the front plate 10 (the plate on the opposite side to the wall A) near the left and right sides, respectively. It is. An upper opening 12 is formed near the upper portion of the front surface, and a lower opening 13 is formed near the lower portion. As shown in FIGS. 4 and 5, the fixed duct portion 1b of the main body 1 is integrally formed with left and right side plates 14, a front plate 15, and a top plate, which are integrally continuous with both sides of the front plate 10 of the mounting portion 1a. 1
6 and an intermediate vertical plate 17 in the shape of a square tube,
And a notch 19 are formed.

As shown in FIGS. 4 and 6, the movable duct portion 2a of the hood 2 has a rectangular cylindrical shape that is vertically movably inserted into the fixed duct portion 1b. This movable duct 2a
An airtight member, for example, a packing 20 is provided on the upper part of.
The packing 20 prevents the inflow of air from the gap between the inner surface of the fixed duct portion 1b and the outer surface of the movable duct portion 2a, and enhances the exhaust efficiency.

As shown in FIG. 7, the movable duct 2a
A plurality of ring-shaped protrusions 21 may be formed on the upper part of the frame, and the ring-shaped protrusions 21 may form a labyrinth groove 22 between the inner surface of the fixed duct portion 1b and the outer surface of the movable duct portion 2a. By doing so, the labyrinth groove 22
Thereby, the inflow resistance of the air can be increased, and the inflow of the air from the gap can be reduced.

As shown in FIGS. 4 and 6, the smoke absorbing portion 2b of the hood 2 has a box-like shape with a lower surface opened by an upper plate 23 and a peripheral plate 24, and has a large opening 25. Its peripheral plate 24
The lower edge 24a is bent inward. A pair of left and right vertical guides 26 is attached to the rear surface of the peripheral plate 24. The vertical guide 26 is slidably fitted on the vertical guide rail 11, and the hood 2 can move up and down with respect to the main body 1. Lower end surface of the peripheral plate 24 (the lower surface of the smoke absorbing section 2b)
Is oblique with respect to the horizontal such that the front is higher than the rear. A suction opening 27 is formed in the upper surface plate 23, and the movable duct portion 2 a is provided on a peripheral upper surface of the suction opening 27. A filter 28 is removably attached to the lower surface of the periphery of the suction opening 26. Therefore, the filter 28 can be attached and removed from the opening 25 by opening the opening 25 with the cover body 8 in the vertical position.

An escutcheon 30 is attached to the front surface of the peripheral plate 24 and to the lower portion of the left and right side surfaces. The escutcheon 30, as shown in FIG.
1 and a pair of mounting projections 32 integrally provided near the upper portion of the vertical portion 31 to form a recess 33, and the pair of mounting projections 32 is mounted on the peripheral plate 24 with screws 34. A wiring space 35 continuous in the longitudinal direction is formed. In the wiring space 35, the human body detector 5, electric wires connecting the operation panel described later and each device, etc. can be collectively wired. Therefore, the appearance is good without the wires and the like being exposed to the outside. Further, when the inner surface of the smoke absorbing section 2b and the filter 28 are cleaned with the cleaning liquid as described later, the cleaning liquid is not sprayed on the electric wires or the like.

Although the escutcheon 30 attached to the front face and the escutcheon 30 attached to the side face are cut at 45 degrees and connected by butt connection, they may be connected using a corner joint.

The vertical portion 31 and the lower edge 24a of the peripheral plate 24
And a concave portion 36 facing downward is formed. The downward concave portion 36 is continuous with the front surface and the left and right side surfaces, and when the cover body 8 is in the horizontal position, a rising piece described later enters the concave portion 36.

The blower 3 has a shape in which a fan 3b and an electric motor 3c are provided in a casing 3a, and the casing 3a is attached to an upper surface plate 16 of the fixed duct portion 1b. By rotating the fan 3b with the electric motor 3c, the gas generated during cooking is sucked into the smoke absorbing section 2b together with air, and is discharged outside through a filter 28 through a duct (not shown).

The cover body 8 comprises a rectangular plate-like substrate 8a,
It has a generally dish-like shape with a rising piece 8b integrally provided at each edge thereof. For example, it is formed by bending a single plate. A pair of right and left mounting projections 37 are provided on the rear rising piece 8b. The rear portion of the cover 8 on the substrate 8a is recessed so that the left and right central portions are lowered, and return pipes 38 are attached to the left and right central portions of the recess.

A shaft 39 is fixed over the pair of right and left mounting projections 37 as shown in FIG. This axis 39 is
A pair of left and right support pieces 40 fixed to the rear surface of the peripheral plate 24 of the smoke absorbing section 2b are used rotatably.
Is rotated by an electric motor 41 for a cover attached to the motor. The mounting projection 37, the return pipe 38, the shaft 39,
As shown in FIG. 4, the support piece 40 and the electric motor 41 pass through the lower opening 13 of the front plate 10 of the mounting portion 1a, and the mounting portion 1a
Protrude into.

Thus, by rotating the shaft 39 forward and backward, the cover body 8 is turned up and down to be in a horizontal position and a vertical position. When the cover body 8 is turned to the horizontal posture as shown in FIG. 4, the rising piece 8b enters the recess 36 as described above, as shown in FIG. As a result, the rising pieces 8b are covered with the escutcheon 30, and the lower part (the lower edge of the hood) of the peripheral surface plate 24 of the smoke absorbing portion 2b and the rising pieces 8b (the upper edge of the cover body 8) of the cover body 8 are escutcheon 30.
The smoke absorbing portion 2b
Then, the cover body 8 has a clear appearance and looks like the above-mentioned bivalves.

As shown in FIGS. 4 and 8, the rising piece 8b (upper edge) of the cover body 8 is provided on the peripheral plate 24 of the smoke absorbing section 2b.
And the rising piece 8b overlaps with the outside of the lower edge portion 24a.
Of the peripheral plate 24 and an outer surface of the lower edge 24a of the peripheral plate 24. This minute gap a
Is not limited to a labyrinth. The small gap a serves as an air passage during the drying operation as described later. As will be described later, when cleaning the inner surface of the smoke absorbing section 2b and the filter 28 with the cleaning liquid, the cleaning liquid does not leak out from the minute gap a.

As will be described later, the electric motor 41 is driven and controlled in synchronization with the electric motor 3c of the blower 3. When the range hood is used, the cover 4 is in a vertical position (open position), and when not in use, the cover 4 is in a horizontal position (closed position). Position).

As shown in FIG. 4, the electric motor 4a of the hood lifting device 4 is mounted on a horizontal member 42 fixed in the mounting portion 1a. The hood lifting / lowering device 4 includes a rotating force limiting mechanism 4d for limiting the maximum rotating force (torque) of the electric motor 4a to the drum 4b. For example, as shown in FIG. 9, a drum 4b is attached to a drive shaft 43 rotated by an electric motor 4a.
Is rotatably supported, and is held by a collar 44 (stopper) so as not to move in one axial direction. Joint collar 45 attached to the drive shaft 43 so as not to rotate.
Is provided with a ball plunger 46. The ball plunger 46 is fitted and urged by a spring 47 into a hole 48 formed in the end face of the drum 4b to form a rotational force limiting mechanism 4d.

As described above, the load applied to the drum 4b is large, and the rotational force (torque) transmitted from the drive shaft 43 to the drum 4b is larger than a set value determined by the spring force of the spring 47 and the like. In this case, the ball plunger 46 separates from the hole 48, the drive shaft 43 idles with respect to the drum 4b, and no rotational force is transmitted to the drum 4b. That is, the torque limiting mechanism 4d limits the maximum value of the torque transmitted from the electric motor 4a to the drum 4b. Drum 4b
Is rotated 180 degrees, the next hole 48 is in the ball plunger 4.
6, the ball plunger 46 fits into the hole 48, so that the hood 2 does not rotate downward by its own weight.

Therefore, when the electric motor 4a is driven to move the hood 2 up and down, if a human hand intentionally or accidentally touches the hood 2 to prevent opening and closing, the driving shaft 43 The hood 2 stops as it is without transmitting the rotational force to the drum 4b. Therefore, it is possible to ensure human safety and prevent the hood 2 from being damaged.

As shown in FIG. 4, the cable 4c hangs down from the upper opening 12 via a pulley 49 provided on the mounting portion 1a, and is connected to the rear side of the upper surface plate 23 of the smoke absorbing portion 2b of the hood 2. I have.

The hood raising / lowering device 4 may have the structure shown in FIG. That is, both ends of the cable 4c are connected to the pulley 4b.
And a pair of upper and lower pulleys 49. The cable 4c is connected to the hood 2 (smoking section 2b). When the pulley 4b is rotated in one direction, one end of the rope 4c is wound up and the other end is extended. When the pulley 4b is rotated in the other direction, the other end of the rope 4c is taken up and one end is extended.

In this manner, the tension is constantly applied to the cable 4c, so that a smooth movement can be realized during the ascent and descent. Also, even if an upward external force acts on the hood 2 (smoking section 2b), it does not rise.

This embodiment includes a cleaning device for cleaning the inner surface of the smoke absorbing section 2b and the filter 28 (inside the hood). As shown in FIG.
And a cleaning liquid supply unit 51 provided in the mounting unit 1a. The cleaning liquid is supplied to the cleaning liquid spraying section 50 by the cleaning liquid supply section 51, and the cleaning liquid sprayed on the inner surface of the filter 28 and the smoke absorbing section 2b is collected and circulated several times for cleaning and then drained to the outside.

The cleaning liquid injection unit 50 is provided with a filter 28
And an inward nozzle 52 that sprays the cleaning liquid on the filter 28 and an outward nozzle 53 that faces the inner surface of the smoke absorbing section 2b and sprays the cleaning liquid on the inner surface. The cleaning liquid spray angles and numbers of the nozzles 52 and 53 are set so that cleaning can be performed most efficiently. For example, the inward nozzle 52 is substantially horizontal, and the outward nozzle 53 is upward, horizontal, and downward.

The cleaning liquid spraying section 50 is not limited to the above-described one, and a plurality of nozzles may be independently used for the smoke absorbing section 2b.
May be mounted facing the filter 28. Alternatively, a plurality of nozzles may be provided in a rotatable nozzle body, and the nozzle body may be rotated by a cleaning liquid ejected from some nozzles.

As shown in FIG. 11, the cleaning liquid supply section 51 includes a cleaning liquid tank 54, a pressure pump 55 for pressing the cleaning liquid in the cleaning liquid tank 54 to the nozzles 52 and 53,
Water supply means 5 for supplying a cleaning liquid into the cleaning liquid tank 54
6, a drainage means 57 for draining the cleaning liquid in the cleaning liquid tank 54 to the outside, a heater 58 for heating the cleaning liquid in the cleaning liquid tank 54, and the like. The pump 55 is driven by an electric motor 55a. The discharge side of the pump 55 is connected to the nozzles 52 and 53 by a flexible pipe 55b.

The water supply means 56 includes a water supply pipe 59 connected to an unillustrated water supply pipe, and a water supply pipe 59.
, For example, a water supply electromagnetic on-off valve 60. The water supply pipe 59 may be provided with a filter and a water supply tap. This filter collects corrosion-causing substances such as disinfectants and disinfectants in tap water that may cause early corrosion of the inside of the hood. The water supply main tap is closed when the range hood is not used for a long period of time to prevent tap water from leaking from the water supply electromagnetic on-off valve 60 and the like, and is normally opened.

The drainage means 57 includes a drainage pipe 61 connected to a sewer pipe or a sink (not shown), and an on-off valve provided on the drainage pipe 61, for example, an electromagnetic on-off valve 62 for drainage. The electromagnetic on-off valve 62 for drainage is normally closed, and is opened at the end of one washing operation or at the end of a plurality of washing operations (that is, when the washing liquid in the washing liquid tank 54 becomes dirty), or optionally for a predetermined time. Then, the dirty cleaning liquid in the cleaning liquid tank 54 is drained to a sewer pipe. The drain pipe 61
A drainage plug may be provided at the bottom.

The heater 58 generates heat when energized. The heater 58 heats the cleaning liquid in the cleaning liquid tank 54 to generate hot water.
For example, warm water of 50 to 70 degrees is used. Specifically, the temperature of the cleaning liquid in the cleaning liquid tank 54 is detected by a temperature sensor, and the detected temperature is applied to the heater 58 to control the temperature of the cleaning liquid from 50 degrees to 50 degrees.
Use 70 degree warm water. By connecting the water supply pipe 59 to a hot water outlet of a water heater installed in a kitchen or the like, hot water can be supplied to the cleaning liquid tank 54. However, if the cleaning liquid in the cleaning liquid tank 54 is used repeatedly, Is lowered, and in that case, the heater 58 is used to heat.

As shown in FIG. 4, the return pipe 38 provided in the cover body 8 is connected to the cleaning liquid tank 54 through the lower opening 13 of the front plate 10 of the mounting portion 1a when the cover body 8 is in the horizontal position. The cleaning liquid that protrudes and flows down to the cover body 8 is collected in the cleaning liquid tank 54.

As shown in FIG. 2, an operation panel 70 is attached to the front surface of the smoke absorbing section 2b (the front surface of the hood 1), for example, the escutcheon 30 attached to the front surface of the peripheral plate 24. The human body detector 5 is also attached to the escutcheon 30. As shown in FIG. 12, the operation panel 70
An operation unit 71 for a range hood is provided. The operation unit 71 for the range hood includes a switch 72 and a weak operation switch 7.
3, a middle operation switch 74, a strong operation switch 75, a timer switch 76, an illumination switch 77, and the like. The configuration of this switch is an example, and there may be a difference in configuration depending on the function. The operation panel 70 is provided with a cleaning selector 78, a cleaning start button 79, a first timer 80, a second timer 81, and a third timer 82. These operation signals and the like are input to the controller 83. The temperature detected by the temperature sensor 84 for detecting the temperature of the cleaning liquid in the cleaning liquid tank 54 is input to the controller 83. The controller 83 is the same as the controller 7 shown in FIG. 3, and receives a human body detection signal from the human body detector 5.

The controller 83 drives the electric motor 3c of the blower 3, the electric motor 4a of the hood elevating device 4, the electric motor 41 for moving the cover 8, and the electric motor 55a of the pressure feed pump 55 based on the input signals and the like. Then, the solenoids 60 a and 62 a of the water supply electromagnetic on / off valve 60 and the drainage electromagnetic on / off valve 62 and the heater 58 are energized. The arrangement and arrangement of the operation panel 70 and the range hood operation unit 71 may be changed depending on the allowable space.

The cleaning selector 78 is located at the automatic cleaning position 78.
The position is manually switched to the cleaning position 78b and the cleaning stop position 78c as needed. The first timer 80 sets a cleaning start time once a day. This cleaning start time is one day (24 hours)
The time when the frequency of using the inner range hood is the least, for example, 23:30. The second timer 81 sets a cleaning time per one time. The washing time per time is set according to the content of cooking in the range, for example, whether the amount of oil used is large or small. The third timer 82
Sets the drying operation time described later.

Although the controller 83 is built in the operation panel 70, it may be provided in the main body 1. An electric wire 8 for transmitting the signal of the controller 83 to an electric motor or the like
As shown in FIG. 8, the main body 1b is provided in the wiring space 35 of the escutcheon 30 as described above and passes through the holes (not shown) of the side plate 14 from the wiring space 35 of the escutsion 30 on both the left and right sides. And connected to the electric motor 3c of the blower 3. The way of wiring the electric wires 85 is not limited to this.

Next, the operation of the range hood will be described.
By operating any of the weak operation switch 73, the medium operation switch 74, and the strong operation switch 75, the controller 83 is operated.
The range hood operation signal is input to Controller 8
Reference numeral 3 outputs a signal for driving the electric motor 41 for the cover body, drives the electric motor 41, and rotates the cover body 8 downward to open the opening 25 of the smoke-absorbing section 2b in the vertical position. A detection signal indicating that the cover body 8 is in the vertical position by a limit switch or the like or a drive signal for the electric motor 41 is output, and after a predetermined time elapses, the electric motor 4
Stop 1 At the same time, or in response to a detection signal indicating that the cover body 8 is in the vertical orientation by a limit switch or the like, the controller 83 causes the electric motor 3c of the blower 3 to operate.
By driving the electric motor 3c to operate the blower 3, the gas generated during cooking is collected and discharged to the outside as described above.

As described above, when the human body detection signal is not input during the range hood operation, the hood elevating device 4
The hood 2 is lowered by driving the electric motor 4a. At the same time, the controller 83 controls the electric motor 3 of the blower 3
The amount of electricity of c is reduced, and the suction capacity of the blower 3 is reduced. That is, since the height of the hood 2 is low, gas generated during cooking can be sufficiently collected even if the suction capacity of the blower 3 is small.

As described above, when the cooker approaches the hood 2 while operating the range hood with the hood 2 at the lower position, the human body detector 5 outputs a human body detection signal. The controller 83 drives the electric motor 4a of the hood elevating device 4 in the opposite direction to the above, and raises the hood 2 to the upper position. Thus, the food 2 does not hinder cooking for the person who cooks. At the same time, the controller 83 increases the amount of current supplied to the electric motor 3c of the blower 3 to increase the suction capacity of the blower 3. by this,
Even if the height of the food 2 is high, gas generated during cooking can be sufficiently collected.

When a range hood stop signal by operating the off switch 72 or a time-up signal when the timer switch 76 is operated is input to the controller 83, the controller 83 outputs a signal for stopping the electric motor 3c of the blower 3. Output and blower 3 is stopped. At the same time, the controller 83 controls the electric motor 4a of the hood lifting device 4
And the hood 2 is raised to the upper position as described above. As described above, when the range hood is stopped, the hood 2 automatically moves to the upper position. Therefore, when a person approaches the range B in preparation for the next cooking start while the range hood is stopped, the hood 2 is stopped. Does not get in the way.

At the same time as the blower 3 is stopped, the controller 38 outputs a signal for driving the electric motor 41 for the cover body, and the electric motor 41 is driven to rotate in the opposite direction to the above to raise the cover body 8 upward. And the opening 25 of the smoke absorbing section 2b is closed. The electric motor 41 is stopped by the detection signal of the above-described limit switch, and the cover body 8 is held in the horizontal posture.

As described above, when the operation of the range hood starts, the cover body 8 automatically turns to the vertical position, and when the operation of the range hood ends, the cover body 8 automatically assumes the horizontal position. The operation of vertically rotating the cover body 8 is unnecessary, and the cover body 8 does not malfunction.

Next, the cleaning operation will be described. Cleaning selector 7
When 8 is the automatic cleaning position 78a. When the cleaning start time set by the first timer 80 comes, it is confirmed that the cover body 8 is in the horizontal orientation, and the cleaning operation is started. When the cover body 8 is not in the horizontal position, the cover body 8 is set to the horizontal position by driving the electric motor 41 for the cover body as described above. At this time, it is assumed that a predetermined amount of the cleaning liquid is stored in the cleaning liquid tank 54 and is heated by the heater 58 as hot water of a predetermined temperature.

The controller 83 outputs a signal for driving the electric motor 55a of the pump 55,
Drive. The cleaning liquid in the cleaning liquid tank 54 is pressure-fed by the pressure pump 55, and the cleaning liquid is sprayed from the nozzles 52 and 53 onto the inner surface of the filter 28 and the smoke absorbing portion 2b, thereby cleaning the attached oil and the like. At this time, since the cleaning liquid is warm water of a predetermined temperature, oil and the like adhering to the filter 28 and the inner surface of the smoke absorbing section 2b can be sufficiently cleaned without mixing a detergent into the cleaning liquid.

The washed cleaning liquid flows down to the cover body 8, flows along the cover body 8, flows down from the return pipe 38 into the cleaning liquid tank 54, and is collected. in this way,
Since the washed cleaning liquid is collected in the cleaning liquid tank 54, the cleaning liquid can be circulated and reused for cleaning.

After cleaning for a preset time, the electric motor 55a of the pressure feed pump 55 is stopped, and the pressure of the cleaning liquid is stopped to finish the cleaning. After the completion of the washing, air is naturally dried for a certain period of time using the residual heat of the hot water. After this, the electric motor 3c of the blower 3 is driven at a low speed (corresponding to the weak operation of the range hood) and the time set by the third timer 82 is set.
For example, a drying operation is performed for 10 minutes. As a result, air is sucked into the smoke-absorbing section 2b from the minute gap a, the cleaning liquid attached to the inner surface of the smoke-absorbing section 2b and the filter 28 is discharged to the outside, and the inner surface of the smoke-absorbing section 2b and the filter 28 are dried. Becomes

As described above, with the cover body 8 in the horizontal position and the opening 25 of the smoke absorbing section 2b closed,
Since the minute gap a is formed between the cover 8 and the smoke absorbing section 2b, the drying operation can be performed without rotating the cover body 8 up and down.

If the cleaning liquid is prevented from leaking by pressing the cover body 8 against the lower edge 24a of the peripheral surface plate 24 of the smoke absorbing section 2b via a sealing material, the cover body 8 is not used during the above-mentioned drying operation. Is pivoted slightly downward to cover body 8 and peripheral plate 2.
A gap may be formed between the lower edge portion 24a and the lower edge portion 24a to allow air to flow.

Thus, a series of automatic cleaning operations is completed. This automatic cleaning operation may be performed plural times in one day.

When the cleaning selector 78 is set to the cleaning position 78b as needed. By operating the cleaning start button 79, the cleaning is performed for the time set by the second timer 81 in the same manner as described above, and then the range hood is dried for the time set by the third timer 82. As described above, by setting the cleaning selector 78 to the cleaning position 78b as needed, the smoke absorbing section 1 can be set at an arbitrary timing.
The inner surface of a and the filter 2 can be washed.

By performing the cleaning operation of the inside of the hood as described above, the cleaning liquid in the cleaning liquid tank 54 may become dirty or the amount thereof may be insufficient. In this case, the cleaning liquid in the cleaning liquid tank 54 is exchanged as follows. When the controller 83 detects the end of one cleaning operation or the end of a plurality of cleaning operations, or when a cleaning liquid exchange signal is input to the controller 83 by a switch or the like. Controller 8
3 energizes the solenoid 62a of the drainage electromagnetic on-off valve 62 to bring it to the open position. Thus, the dirty cleaning liquid in the cleaning liquid tank 54 is drained to the sewer pipe or the sink by the drain pipe 61. Completion of this drainage, for example, solenoid 62a
When a predetermined time has passed since the power was supplied to the
When the washing liquid no signal of the water level sensor provided at the lower part of the sensor 4 is input, the controller 83 stops the power supply to the solenoid 62a and closes the electromagnetic on-off valve 62 for drainage. Thereafter, the solenoid 60a of the water supply electromagnetic on-off valve 60 is energized to the open position. As a result, tap water is supplied into the cleaning liquid tank 54 from the water pipe as the cleaning liquid. When a predetermined amount of cleaning liquid has accumulated in the cleaning liquid tank 54, for example, when a predetermined time has elapsed after energizing the solenoid 60 a, or when a cleaning liquid detection signal of a water level sensor provided at the upper part of the cleaning liquid tank 54 is input, the controller 83. Turns off the solenoid 60a and closes the water supply solenoid valve 60.

When the cleaning liquid is exchanged as described above, the heater 58 is energized to heat the cleaning liquid in the cleaning liquid tank 54, and when it is detected by the temperature sensor 84 that the predetermined temperature has been reached, the heater 58 is turned on. Turn off the power. When the temperature of the cleaning liquid in the cleaning liquid tank 54 decreases with the passage of time, the heater 58 is energized and heated. This operation is repeated to maintain the temperature of the cleaning liquid in the cleaning liquid tank 54 at a predetermined temperature.

Although the range hood having the filter 28 has been described in the above embodiment, the present invention can also be applied to a centrifugal force type range hood without a filter. For example, by attaching the cover body 8 and the cleaning device, the same operation and effect as described above can be obtained.

[0076]

According to the first aspect of the present invention, the hood 2
When there is a person near the hood, the hood 2 moves to the upper position, and the hood 2 does not hinder the cooking for the cook. When there is no person near the hood 2, the hood 2 moves to a lower position and can collect a large amount of gas generated during cooking. Therefore, when the cook approaches the range and cooks, the food 2 does not hinder cooking for the cook. When the cooker leaves the stove during cooking, the hood 2 moves to the lower position and can collect a large amount of gas generated during cooking. Therefore, even if the suction capacity of the blower 3 is small, the gas generated during cooking can be sufficiently removed. Can be collected.

Therefore, the gas generated at the time of cooking can be sufficiently collected, the food 2 does not hinder cooking by the cook, and the power consumption of the electric motor of the blower 3 is small and the operating cost is low. In addition, when a range using the electromagnetic induction heating method is used in a highly airtight house, it is possible to prevent a negative pressure in the room during the operation of the range hood.

According to the second aspect of the present invention, gas generated during cooking can be sufficiently collected when the hood 2 is at the upper position or at the lower position.

According to the third aspect of the present invention, when the hood 2 is moving, the movement of the hood 2 is hindered by a human hand intentionally touching the hood 2 accidentally or accidentally. When the force for moving the motor 2 exceeds the maximum value, the torque of the electric motor 4a is not transmitted by the torque limiting mechanism 4d, and the hood 2 does not move.

According to the fourth aspect of the invention, the cover 8
Is moved to the open position, the opening 25 of the hood 2 is opened. By driving the blower 3, gas generated during cooking can be discharged to the outside. Since the opening 25 of the hood 2 is closed by moving the cover 8 to the closed position, the inside of the hood such as the inner surface of the hood 2 cannot be seen. Therefore, the inside of the hood 2 in an unsightly state to which oil or the like adheres is not visible, so that the appearance is good. In addition, the hood 2 and the cover body 8 are integrated and have a clean appearance, and there is a sense of cleanliness.

According to the fifth aspect of the present invention, the cover 8 is in the open position when the range hood is used, and is in the closed position when the range hood is not used. The operation of moving 8 is unnecessary.

[Brief description of the drawings]

FIG. 1 is a side view showing an attached state of a range hood.

FIG. 2 is a front view showing a mounted state of a range hood.

FIG. 3 is a control circuit diagram.

FIG. 4 is a longitudinal sectional view of a range hood.

FIG. 5 is a perspective view of a main body.

FIG. 6 is a perspective view of a hood.

FIG. 7 is a cross-sectional view showing a method of airtightness between a fixed duct portion and a movable duct portion.

FIG. 8 is an enlarged sectional view of a portion Y in FIG. 4;

FIG. 9 is an explanatory diagram of a rotational force limiting mechanism.

FIG. 10 is an explanatory view showing another embodiment of the hood elevating device.

FIG. 11 is a front view of a cleaning liquid supply unit.

FIG. 12 is a control circuit diagram.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main body, 1a ... Mounting part, 1b ... Fixed duct part, 2 ... Hood, 2a ... Movable duct part, 2b ... Smoke absorption part, 3 ... Blower, 3c ... Electric motor, 4 ... Hood elevating device, 4a ... Electric motor, 4d: rotational force limiting mechanism, 5: human body detector (human body detecting means), 6: mat switch (human body detecting means),
7 ... controller, 8 ... cover body, 28 ... filter,
Numeral 30: escutcheon, 41: electric motor, 50: cleaning liquid injection unit, 51: cleaning liquid supply unit, 70: operation panel, 8
3. Controller.

Claims (5)

[Claims] 1. A main body 1, a hood 2 which moves up and down with respect to an upper position and a lower position with respect to the main body 1, and a blower 3 which sucks gas generated during cooking together with air through the hood 2 and discharges the gas to the outside. A hood raising / lowering device 4 for raising / lowering the hood 2; a human body detecting means for detecting that a person approaches the hood 2 and outputting a human body detection signal; and operating the hood raising / lowering device 4 based on the human body detection signal. A range hood, comprising: a controller that controls the hood 2 to be in an upper position when the human body detecting means detects a person, and the hood 2 to be in a lower position when no human is detected. 2. The range hood according to claim 1, wherein the suction capacity of the blower 3 is large when the hood 2 is in the upper position and is small when the hood 2 is in the lower position. 3. The hood lifting device 4 includes an electric motor 4a for moving the hood 2 to an upper position and a lower position, and a rotational force limiting mechanism 4d for restricting a maximum value of a force for moving the hood 2 by the electric motor 4a. The range hood according to claim 1 or 2, further comprising: 4. The hood 2 includes a cover body 8, and the cover body 8 closes an opening 25 on a lower surface of the hood 2;
The range hood according to any one of claims 1 to 3, wherein the range hood moves over a position where the opening 25 is opened. 5. The cover body 8 is moved to a closed position and an open position by an electric motor 41. The electric motor 41 is driven and controlled in synchronization with the blower 3 so that the cover body 8 is in the open position during the range hood operation. ,
The range hood according to claim 4, wherein the cover body (8) moves to the closed position while the range hood is stopped.