JP2001248866A - Range hood, and flame sensor unit used for it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably detect ultraviolet rays contained in flame from an inner corn luminous flame type burner and further reliably control the operation of a blower in linking with the operation of a cooker even if an application is made to the cooker, for example, with the inner corn luminous flame type burner. SOLUTION: A range hood (A) that is arranged at the upper portion of a cooker (B) and incorporates a blower (2), a flame sensor unit (10) for detecting ultraviolet rays contained in flame that is generated in the cooker, and a control part (9) for controlling the operation of the blower based on the detection result of the flame sensor unit, are provided. The flame sensor unit is mounted to a back guard part (24) on a kitchen top (20) to detect ultraviolet rays from flame being generated by the cooker nearly along a horizontal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a range hood and a flame sensor unit used for the range hood, and more particularly to a range hood which is disposed above a cooking device such as a gas range and has a built-in blower. .

[0002]

2. Description of the Related Art In recent years, a range hood with a so-called flame sensor-integrated heating cooker in which a fan of a range hood is operated in conjunction with the operation of a heating cooker such as a gas range is becoming widespread. In this type of conventional range hood, a flame sensor is arranged inside a range hood body having a built-in blower for exhausting oil smoke, moisture, etc. generated in a kitchen to the outside. The contained ultraviolet rays are detected from above substantially in the vertical direction. Then, the operation of the blower is controlled in accordance with a predetermined mode according to the detection signal of the ultraviolet ray from the flame sensor.

[0003] The above-mentioned flame sensor is expensive, but is excellent in responsiveness because it is a form in which detection is performed in response to ultraviolet rays contained in the flame. Therefore, the operation of the range hood blower is started by instantly detecting the ignition due to the start of the operation of the heating cooker, and the operation of the range hood blower is stopped by instantly detecting the fire extinguishing by stopping the operation of the heating cooker. be able to. That is, the flame sensor that detects ultraviolet light has excellent characteristics that other sensors do not have in that it can instantaneously detect the start and stop of the operation of the heating cooker.

[0004]

However, due to recent advances in combustion technology in heating cookers such as gas ranges, the shape of the kitchen top plate, the shape of the burner, and the shape of the virtue have been diversified. In particular, from a heating cooker provided with a so-called external flame type burner in which the burner part is provided on the top of the top plate, to a heating cooker provided with a so-called internal flame type burner in which the burner part is provided in the lower part of the top plate Is shifting to. For this reason, in the conventional range hood, it is very difficult to detect the ultraviolet rays from the flame generated in various types of heating cookers to which the new combustion technology is applied.

More specifically, in a heating cooker provided with an external flame burner, an annular external flame burner having a flame hole on the outer periphery is provided above the top plate surface, and the external flame burner and An opening positioned concentrically is formed in the top plate, and the flame from the flame hole is guided upward and outward through this opening. On the other hand, in a heating cooker having an internal flame type burner, an annular internal flame type burner having a flame hole on the inner periphery is provided below the surface of the top plate,
An opening positioned concentrically with the internal flame burner is formed in the top plate, and the flame from the flame hole is guided upward and inward through the opening. Heating cookers equipped with internal flame type burners have been
It has emerged as an energy-saving and high-calorie heating cooker.

As described above, in a heating cooker provided with an internal flame burner, the internal flame burner is provided below the surface of the top plate. For this reason, in a state where the pot is placed on the top plate of the top plate, in the heating cooker equipped with the external flame type burner, a part of the flame protrudes to the outer peripheral side of the pan, whereas the internal flame type burner is provided. In the heating cooker, the flame does not protrude to the outer peripheral side of the pot. As a result, in the conventional range hood, the flame sensor disposed above the cooking device cannot reliably detect the ultraviolet light contained in the flame from the internal flame type burner, and is linked to the operation of the cooking device. As a result, the operation of the blower cannot be reliably controlled.

[0007] The present invention has been made in view of the above-mentioned problems, and even when applied to, for example, a heating cooker having an internal flame type burner, the ultraviolet rays contained in the flame from the internal flame type burner can be reliably detected. It is an object of the present invention to provide a range hood capable of reliably controlling the operation of a blower in conjunction with the operation of a heating cooker, and a flame sensor unit used for the range hood.

[0008]

In order to solve the above-mentioned problems, according to the present invention, in a range hood which is disposed above a cooking device and has a built-in blower, an ultraviolet ray contained in a flame generated in the cooking device is provided. And a control unit for controlling the operation of the blower based on the detection result of the flame sensor unit, the flame sensor unit, from the flame generated in the heating cooker A range hood is provided which is attached to a back guard portion on a kitchen top plate in order to detect ultraviolet rays along a substantially horizontal direction.

According to a preferred aspect of the present invention, the flame sensor unit is built in a heat insulating plate attached to the back guard, or is built in the back guard. The apparatus further includes a human body sensor for detecting the presence of a person located in front of the cooking device, wherein the control unit is configured to control the blower based on a detection result of the human body sensor and a detection result of the flame sensor unit. Is preferably controlled.

According to another aspect of the present invention, in the flame sensor unit used in the above-described range hood of the present invention, the flame sensor unit includes a light transmitting portion formed on the back guard portion or the back portion. A flame sensor unit comprising: a sensor main body for receiving ultraviolet rays through a light transmitting portion formed on a heat insulating plate attached to a guard portion. In this case, it is preferable that the flame sensor unit further includes a transmission unit for wirelessly transmitting a signal corresponding to the ultraviolet light received by the sensor main body to the control unit.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a flame sensor unit for detecting ultraviolet rays contained in a flame generated in a cooking device such as a gas range is attached to a back guard on a kitchen top plate. I have. As a result, the flame sensor unit detects the ultraviolet rays from the flame generated by the cooking device substantially in the horizontal direction, unlike the related art in which the ultraviolet rays from the flame generated by the cooking device are detected along the vertical direction. Will be detected.

Therefore, for example, even when the range hood of the present invention is applied to a heating cooker provided with an internal flame type burner, the ultraviolet rays contained in the flame from the internal flame type burner are surely prevented from being blocked by a pot or the like. It is possible to detect and eventually control the operation of the blower in conjunction with the operation of the heating cooker. In other words, according to the present invention, it is possible to reliably detect ultraviolet rays from flames generated in various types of cooking devices to which the new combustion technology is applied.

It is preferable that the flame sensor unit is built in, for example, a heat insulating plate attached to the back guard on the kitchen top plate, or is built in the back guard. According to this configuration, for example, when the present invention is applied to a cooking device such as a gas range, at an appropriate height position between the surface height of the top plate and the top height of the virtues or slightly higher than the top height of the virtues. The flame sensor unit can be easily positioned at an appropriate high position based on a simple configuration. As a result, the ultraviolet rays contained in the flame from the gas burner can be reliably detected almost horizontally.

Further, in the present invention, it is preferable to control the operation of the blower based on the detection result of the human body sensor for detecting the presence of a person located in front of the cooking device and the detection result of the flame sensor unit. . In this case, for example, by adopting a configuration in which the operation of the blower is started only when the flame sensor unit detects ultraviolet rays and the human body sensor detects the presence of a person, the heating cooker is not actually operated. In addition, it is possible to avoid a malfunction of the range hood, in which the flame sensor unit detects ultraviolet rays other than from the heating cooker and the blower is started erroneously.

Further, the flame sensor unit used in the range hood of the present invention emits ultraviolet rays through a light transmitting portion formed on the back guard portion or a light transmitting portion formed on a heat insulating plate attached to the back guard portion. It has a sensor body for receiving light. According to this configuration, for example, the flame sensor unit can be easily formed at an appropriate height from the surface of the top plate of the heating cooker such as a gas range based on a simple configuration, and as a result, the flame from the gas burner can be formed. Can be reliably detected substantially along the horizontal direction.

In this case, the flame sensor unit further includes a transmission unit for wirelessly transmitting a signal corresponding to the ultraviolet light received by the sensor body to the control unit (strictly, a reception unit of the control unit). Is preferred. With this configuration, there is no need to connect the flame sensor unit separated from the range hood body and the control unit built in the range hood body by wire, and the installation work of the flame sensor unit and, consequently, the installation work of the range hood are simplified. I do.

As a wireless transmission / reception system, for example, a radio wave system, an infrared system, an ultrasonic system, or the like can be appropriately selected. When the infrared ray method is selected, since infrared rays have a straight traveling characteristic, it is necessary to configure so that a shield does not intervene between the flame sensor unit and the control unit.
On the other hand, when the radio wave method is selected, a stable communication operation can be expected even if a shield is interposed between the flame sensor unit and the control unit because the radio wave has a wraparound characteristic.

An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view schematically showing a configuration of a range hood according to an embodiment of the present invention. FIG.
FIG. 2 is a view corresponding to FIG. 1 and is a side view including a partially cut-away cross section. In the present embodiment, the range hood of the present invention is applied to a heating cooker provided with an internal flame type burner.

The illustrated range hood A has a range hood main body 1 installed above the cooking device B. The range hood main body 1 has a built-in blower 2 having a well-known configuration including, for example, a fan, a motor, and a fan casing. The blower 2 exhausts, via an exhaust duct 3, oil fumes and moisture generated in the kitchen to the outside.
A grease filter 4 is detachably provided at a suction port of the blower 2, and an oil panel 5 is provided below the grease filter 4.

The range hood body 1 has an operation panel 6 provided on a front panel. The operation panel 6 includes an operation switch for manually operating the start and stop of the operation of the blower 2, and an operation switch for manually operating the lighting device (not shown) for illuminating the heating cooker B to be turned on and off. And so on.

Further, the range hood main body 1 is provided with a human body sensor 7 for detecting the presence of a person C located in front of the cooking device B. The detection range (detection range) of the human body sensor 7 is set so as to substantially cover the entire width of the heating cooker B, as shown by a chain line 7a in FIGS. Then, the human body sensor 7 detects the person C only when the user stays in front of the heating cooker B for a predetermined time (for example, several seconds) to operate the heating cooker B, and simply passes the front without operating the heating cooker B. In this case, the configuration is such that the person C is not detected.

The range hood body 1 has a receiving unit 8 for receiving a signal wirelessly transmitted from a flame sensor unit 10 described later, and starts and operates the blower 2 based on the signal received by the receiving unit 8. And a control unit 9 for controlling the stop. The control unit 9 is supplied with not only the detection result of the flame sensor unit 10 but also the detection result of the human body sensor 6. Thus, the flame sensor unit 10
Constitutes a range hood A together with the range hood body 1.

On the other hand, the cooking device B is
A plurality of internal flame burners (not shown) provided below the surface of the pan, and a pot 2 spaced apart from each internal flame burner
1 and 22 for supporting the number 1 and the like. In addition, a back guard portion 24 that stands up along the wall portion 23 is formed at a rear portion of the kitchen top plate 20. Also,
The back guard portion 24 has a heat shield plate 25 for protecting the back guard portion 24 from heat radiated by each internal flame type burner.
Is attached. In the present embodiment, the flame sensor unit 10 is built in a heat shield 25 attached to the back guard 24.

FIG. 3 is a diagram schematically showing the configuration of a flame sensor unit built in a heat shield attached to the back guard. As shown in FIG.
The heat-insulating plate 25 attached to the base plate is composed of an L-shaped cover plate 25a made of, for example, stainless steel, and a flexible plate 25b made of a noncombustible material provided inside (on the side opposite to the burner). .

The cover plate 25a and the flexible plate 25b have circular openings (or light transmitting portions) 2.
5c is formed. Here, the opening 25c is formed at an appropriate height position between the surface height of the top plate 20 and the upper end height of the virtues 22, or at an appropriate height position slightly higher than the upper end height of the virtues 22. ing. The flame sensor unit 10 for detecting the ultraviolet rays contained in the flame from each internal flame type burner is positioned inside the opening 25c. That is, the flame sensor unit 10
At the above-mentioned predetermined height position, it is positioned at a predetermined angle toward the flame from each internal flame type burner.

FIG. 4 is a diagram schematically showing the internal configuration of the flame sensor unit. As shown in FIG. 4, in the flame sensor unit 10, the sensor main body 31 receives the ultraviolet light contained in the flame from each internal flame type burner. The information on the ultraviolet rays received by the sensor main body 31 is converted into an ultraviolet ray detection signal by the microcomputer 32 and supplied to the transmission unit 33. In the transmission unit 33, the microcomputer 3
The ultraviolet detection signal supplied from 2 is connected to the range hood body 1
Wirelessly to the receiving unit 8. In addition, as a wireless communication system between the transmission unit 33 and the reception unit 8, for example, a radio system,
An infrared method, an ultrasonic method, or the like can be appropriately selected.

FIG. 5 is a diagram schematically showing the internal configuration of the range hood main body. As shown in FIG. 5, in the range hood body 1, the flame sensor unit 10
And a human body detection signal from the human body sensor 7 are supplied to the control unit 9. The control unit 9 is also supplied with an operation switch signal from the operation panel 6. Thus, as described later, the control unit 9 controls the operation of the blower based on the ultraviolet ray detection signal from the flame sensor unit 10, the human body detection signal from the human body sensor 7, and the operation switch signal from the operation panel 6.

FIG. 6 is a flowchart for explaining the basic operation of the range hood according to the present embodiment. FIG.
The basic operation of the range hood according to the present embodiment will be described with reference to FIG. In the range hood A of the present embodiment,
When the person C stands in front of the cooking device B and ignites, for example, one internal flame type burner, the flame sensor unit 10 detects ultraviolet rays contained in the flame from the internal flame type burner,
An ultraviolet detection signal is wirelessly transmitted to the receiving section 8 of the range hood main body 1. On the other hand, the human body sensor 7 detects the presence of the person C standing in front of the cooking device B, and wirelessly transmits a human body detection signal to the receiving unit 8.

When the human body sensor 7 detects a human body and the flame sensor unit 10 detects ultraviolet rays, the control unit 9 starts the operation of the blower 2 according to the medium speed rotation mode.
In other words, for example, even if the flame sensor unit 10 detects ultraviolet rays, the operation of the blower 2 is not started unless the human body sensor 7 detects a human body (FIG. 6 shows a pause state of the blower 2). When the blower 2 starts operating, oil smoke and moisture generated in the kitchen are exhausted outside through the exhaust duct 3. After starting the operation of the blower 2, the control unit 9 continues the operation of the blower 2 as long as the human body sensor 7 detects a human body or the flame sensor unit 10 detects ultraviolet rays. In other words, the control unit 9 stops the operation of the blower 2 only when the human body sensor 7 stops detecting the human body and the flame sensor unit 10 stops detecting ultraviolet light.

During operation of the blower 2, an operation switch signal relating to the operation mode is transmitted to the operation panel 6.
As long as it is not supplied to the control unit 9 from the above, the blower 2 continues to operate according to the medium speed rotation mode. That is, as long as the operation switch on the operation panel 6 is OFF, the blower 2 continues the operation without changing the operation mode. On the other hand, when one of the operation switches on the operation panel 6 is turned on, the operation switch is turned on and the operation mode of the blower 2 is changed or the operation of the blower 2 is stopped according to the operation switch. Or

Specifically, the blower 2 is operated in the medium speed rotation mode.
When the strong switch is turned ON while the fan is operating, the operation of the blower 2 is continued with the operation mode of the blower 2 changed from the medium speed rotation mode to the high speed rotation mode. Further, for example, when the middle switch is turned on while the blower 2 is operating in the high-speed rotation mode, the blower 2
The operation of the blower 2 is continued in a state where the operation mode is changed from the high-speed rotation mode to the medium-speed rotation mode. Further, when the weak switch is turned on, the operation of the blower 2 is continued with the operation mode of the blower 2 changed to the low-speed rotation mode. When the off switch is turned on, the operation of the blower 2 is stopped.

As described above, in this embodiment, the flame sensor unit 10 for detecting the ultraviolet light contained in the flame from the internal flame type burner of the cooking device B is provided with the kitchen top plate 20.
It is built in a heat insulating plate 25 attached to the upper back guard 24. That is, the flame sensor unit 10
It is positioned at an appropriate height between the surface height of the top plate 20 and the upper end of the virtues 22, or at an appropriate height slightly higher than the upper end of the virtues 22. As a result, the flame sensor unit 10 reliably detects ultraviolet light contained in the flame from the internal flame type burner along the substantially horizontal direction without being blocked by the pan 21. Thus, in this embodiment, the operation of the blower 2 can be reliably controlled in conjunction with the operation of the heating cooker B.

In this embodiment, a human body sensor 7 for detecting the presence of a person C located in front of the cooking device B is provided.
Is provided, and the control unit 9 does not start the operation of the blower 2 unless both the ultraviolet detection signal from the flame sensor unit 10 and the human body detection signal from the human body sensor 7 are confirmed.
Accordingly, it is possible to avoid a malfunction of the range hood A in which the flame sensor unit 10 detects the ultraviolet rays from other than the heating cooker B and the blower 2 is erroneously started even though the heating cooker B is not actually operated. can do.

Further, in this embodiment, the flame sensor unit 10 wirelessly transmits an ultraviolet ray detection signal to the receiving section 8 of the range hood main body 1. Therefore, it is not necessary to connect the flame sensor unit 10 separated from the range hood main body 1 and the receiving unit 8 built in the range hood main body 1 by wire, and the installation work of the flame sensor unit 10 and, consequently, the installation of the range hood A Construction can be simplified.

In the above-described embodiment, the flame sensor unit 10 is built in the heat-insulating plate 25 attached to the back guard 24 on the kitchen top 20. However, the present invention is not limited to this. It may be configured to be built in the guard unit 24. Further, in the above-described embodiment, the human body sensor 7 for detecting the presence of the person C located in front of the cooking device B is provided, but the human body sensor 7 is not an essential component of the present invention. , Can be omitted.

[0036]

As described above, according to the present invention, even when the present invention is applied to, for example, a heating cooker having an internal flame type burner, the ultraviolet rays contained in the flame from the internal flame type burner can be reliably detected. As a result, the operation of the blower can be reliably controlled in conjunction with the operation of the heating cooker.

Further, by incorporating the flame sensor unit into a heat insulating plate attached to the back guard or into the back guard, the flame sensor unit can be easily placed at a desired height position based on a simple configuration. And ultraviolet rays can be reliably detected along the substantially horizontal direction.

Further, a human body sensor for detecting the presence of a person located in front of the cooking device is provided, and the control unit checks both the ultraviolet ray detection signal from the flame sensor unit and the human body detection signal from the human body sensor. By configuring so that the operation of the blower is not started unless it is not, the malfunction of the range hood can be avoided.

[Brief description of the drawings]

FIG. 1 is a front view schematically showing a configuration of a range hood according to an embodiment of the present invention.

FIG. 2 is a view corresponding to FIG. 1 and is a side view including a partially cut-away cross section.

FIG. 3 is a view schematically showing a configuration of a flame sensor unit incorporated in a heat shield attached to a back guard portion.

FIG. 4 is a diagram schematically showing an internal configuration of a flame sensor unit.

FIG. 5 is a diagram schematically showing an internal configuration of a range hood main body.

FIG. 6 is a flowchart for explaining a basic operation of the range hood of the embodiment.

[Explanation of symbols]

 Reference Signs List A range hood B heating cooker C person 1 range hood main body 2 blower 3 exhaust duct 4 grease filter 5 oil panel 6 operation panel 7 human body sensor 8 reception unit 9 control unit 10 flame sensor unit 20 top plate 21 pot 22 pot 22 wall 23 24 Back guard part 25 Heat insulation plate

Claims (6)

[Claims] 1. A range hood which is disposed above a cooking device and has a built-in blower, wherein: a flame sensor unit for detecting ultraviolet light contained in a flame generated in the cooking device; and a detection of the flame sensor unit. And a control unit for controlling the operation of the blower based on the result, wherein the flame sensor unit detects ultraviolet rays from a flame generated in the cooking device along a substantially horizontal direction,
A range hood that is attached to the back guard on the kitchen top plate. 2. The range hood according to claim 1, wherein the flame sensor unit is built in a heat insulating plate attached to the back guard. 3. The range hood according to claim 1, wherein the flame sensor unit is built in the back guard. 4. A human body sensor for detecting the presence of a person located in front of the heating cooker, wherein the control unit is configured to detect a human body sensor based on a detection result of the human body sensor and a detection result of the flame sensor unit. 4. The method according to claim 1, wherein the operation of the blower is controlled by using the air blower.
Range hood according to the item. 5. The flame sensor unit used in the range hood according to claim 1, wherein the flame sensor unit includes a light transmitting portion formed on the back guard portion or the back guard portion. A flame sensor unit, comprising: a sensor main body for receiving ultraviolet rays through a light transmitting portion formed on a heat insulating plate attached to the sensor. 6. The flame sensor unit according to claim 5, further comprising a transmitter for wirelessly transmitting a signal corresponding to the ultraviolet light received by the sensor body to the controller. 3. The flame sensor unit according to 1.