JP4337665B2 - Electric stove - Google Patents

Description

  The present invention relates to an electric stove provided with a heater body having a heating element and a reflector.

  Conventionally, floor-mounted electric stoves using heating elements such as a sheathed heater and a quartz tube heater have been used for heating in homes, stores and offices.

For example, Patent Literature 1 discloses an electric stove including a main body and an angle adjustment mechanism that can adjust the angle of the main body.
Japanese Patent Application Laid-Open No. 11-294779 (released on October 29, 1999)

  However, the conventional electric heater has the following problems.

  That is, for example, when a user puts a towel to cover the front of an electric stove, trying to dry a wet towel, etc. for a short period of time, or accidentally electric power without noticing that the power is on. When a towel or the like is applied so as to cover the front of the stove, the towel heated by the heating element may ignite.

  To prevent such fires, the conventional electric stove is only described on the back of the product so as not to apply towels, etc., and no mechanism is provided to prevent ignition of towels. It was not enough in terms of safety.

  An object of the present invention is to provide a highly safe electric stove capable of preventing the cloth from igniting even when a cloth such as a towel is covered so as to cover the front surface of the heater body. .

The electric stove according to the first invention includes a heating element, a reflector, a heater body, an overheat protection element, and a rotation mechanism. The reflector reflects the heat of the heating element forward. A casing accommodates a heat generating body and a reflecting plate. The overheat protection element is disposed inside the casing, and cuts off the power supply to the heating element when the ambient temperature exceeds a predetermined temperature. The rotation mechanism changes the vertical and horizontal directions of the casing . The overheat protection element includes a first heating protection element disposed in the vicinity of the upper end when the casing is in the first form by the rotation mechanism, and a longitudinal direction of the casing in the longitudinal direction of the casing in the first form by the rotation mechanism. And a second heating protection element disposed in the vicinity of the upper end when the second shape is substantially orthogonal to the upper end.

  Here, an overheat protection element such as a thermal fuse is provided inside the heater body. In a general electric stove, when a cloth such as a blanket or a towel is applied from the upper part to the front surface, the cloth may be abnormally heated by a heating element to ignite.

  Therefore, in the electric stove of the present invention, when the cloth or the like covers the front surface of the stove, the heat that should be released into the space is confined in the stove. An overheat protection element that cuts off the power supply is provided inside the heater body. In this way, by providing an overheat protection element with a heat resistance temperature below the temperature inside the heater body when the cloth ignites, the power supply to the heating element is shut off before the cloth ignites. Occurrence can be prevented.

Further, here, when a cloth or the like is applied from the upper part to the front surface, the temperature rise is monitored in order to prevent the cloth or the like from being ignited at a position where heat is most likely to be accumulated in the electric stove.

  Thereby, a safer electric stove can be provided by operating the overheat protection element at a position where the temperature is most likely to rise.

In addition, here is provided with the rotating mechanism for changing the vertical and horizontal orientation of the heater body unit, so that the upper portion of the heater body unit is replaced each time. And the overheat protection element is provided in the part which can become the upper part in the heater main-body part, respectively.

  As a result, no matter which direction the heater body is set, the overheat protection element is surely provided on the upper part of the heater body where heat is likely to be trapped when cloth or the like is covered on the front surface in that state. It is possible to reliably prevent the firing of cloth and the like.

The electric heater according to the second invention is the electric heater according to the first invention, and the first overheat protection element and the second overheat protection element have different heat resistant temperatures.

  Here, the plurality of overheat protection elements attached to the inside of the heater body have different heat resistant temperatures depending on the attachment positions.

  For example, when the orientation of the heater main body is changed, the upper end of the heater main body may correspond to a position where the temperature is higher than other positions even during normal use, such as directly behind the reflector. For this reason, the back of the reflector is optimally used to prevent ignition of the cloth covered on the front of the stove, depending on the mounting position, using a heat-resistant temperature higher than that of other overheat protection elements. It is possible to provide an overheat protection element having a high heat resistance temperature. As a result, regardless of the mounting position of the overheat protection element, the overheat protection element can surely prevent the front cloth or the like from being ignited and a safer electric stove can be obtained.

The electric heater according to the third invention is the electric heater according to the first or second invention, and the overheat protection element is attached in a state of being withdrawn from the heater main body into the electric heater.

  Here, since the overheat protection element is fixed in a suspended state, it is not in contact with the reflector or casing of the heater body, and is not affected by the surface temperature thereof.

  For this reason, the temperature rise in the heater main body can be accurately and stably monitored by the overheat protection element.

Electric stove according to the fourth invention, the first be any one of an electric heater of the third aspect of the invention, overheat protection element is a thermal fuse.

  Here, a thermal fuse can be used as the overheat protection element.

An electric stove according to a fifth invention includes a heater body, an overheat protection element, and a rotation mechanism. The heater body has a heating element, a reflecting plate that reflects the heat of the heating element forward, and a casing to which the heating element and the reflecting plate are attached. The overheat protection element is disposed inside the heater body, and cuts off the power supply to the heating element when the ambient temperature exceeds a predetermined temperature. The rotation mechanism changes the vertical and horizontal orientations of the heater body. A plurality of overheat protection elements are provided so as to be arranged in the vicinity of the upper end of the heater body, regardless of whether the heater body is set in any of the vertical and horizontal directions.

  Here, since a rotation mechanism that changes the vertical and horizontal orientations of the heater main body is provided, the upper portion of the heater main body is replaced each time. And the overheat protection element is provided in the part which can become the upper part in the heater main-body part, respectively.

  As a result, no matter which direction the heater body is set, the overheat protection element is surely provided on the upper part of the heater body where heat is likely to be trapped when cloth or the like is covered on the front surface in that state. It is possible to reliably prevent the firing of cloth and the like.

The electric heater according to the sixth invention is the electric heater according to the fifth invention, and the plurality of overheat protection elements have different heat resistant temperatures.

  Here, the plurality of overheat protection elements attached to the inside of the heater body have different heat resistant temperatures depending on the attachment positions.

  For example, when the orientation of the heater main body is changed, the upper end of the heater main body may correspond to a position where the temperature is higher than other positions even during normal use, such as directly behind the reflector. For this reason, the back of the reflector is optimally used to prevent ignition of the cloth covered on the front of the stove, depending on the mounting position, using a heat-resistant temperature higher than that of other overheat protection elements. It is possible to provide an overheat protection element having a high heat resistance temperature. As a result, regardless of the mounting position of the overheat protection element, the overheat protection element can surely prevent the front cloth or the like from being ignited and a safer electric stove can be obtained.

  According to the electric heater according to the first aspect of the present invention, it is possible to prevent the occurrence of fire by cutting off the power supply to the heating element before the cloth or the like ignites.

According to the electric stove according to the second aspect of the present invention, it is possible to reliably prevent the front cloth or the like from being ignited by the overheat protection element regardless of the attachment position of the overheat protection element, thereby obtaining a safer electric stove.

According to the electric heater according to the third aspect of the invention, the temperature rise in the heater main body can be accurately and stably monitored by the overheat protection element.

According to the electric heater according to the fourth invention, a thermal fuse can be used as the overheat protection element.

According to the electric heater according to the fifth aspect of the present invention, it is possible to more reliably prevent the firing of the cloth or the like.

According to the electric stove according to the sixth aspect of the invention, regardless of the attachment position of the overheat protection element, the overheat protection element can surely prevent the front cloth or the like from being ignited and a safer electric stove can be obtained.

  An electric heater according to an embodiment of the present invention will be described below with reference to FIGS.

[Configuration of the entire electric stove]
As shown in FIGS. 1 to 5, an electric heater 1 according to an embodiment of the present invention mainly includes a stand base 11, a heater body (heater body portion) 12, a body column 13, and a heater angle changing mechanism. 14, a heater swing mechanism 15, and a handle 16.

  The stand base 11 is installed on the floor G. On the upper side of the stand base 11, a quadrangular prism-shaped bulging portion 17 in which the heater swing mechanism 15 is built in the internal space is formed.

  The main body column 13 is an elongated rectangular tube-shaped member provided so as to protrude upward from the stand base 11 (specifically, the bulging portion 17).

  The heater swing mechanism 15 is interposed between the main column 13 and the stand base 11 and has a manual swing function and an automatic swing function. The manual swing function means that the main body column 13 is manually rotated within a range of a predetermined swing angle (refer to the heater body 12 illustrated by the swing angle ε and the two-dot chain line in FIG. 5), thereby the heater body. This is the function of twelve head swings. The automatic swing function means that the main body column 13 is moved at a predetermined swing angle (the swing body angle shown in FIG. 5 and the heater main body indicated by the two-dot chain line with reference to the position of the swing angle set by the manual swing function. 12)), and a function of swinging the heater main body 12 by automatically and repeatedly rotating within the range. Such a heater swing mechanism 15 is, for example, a swing motor including a swing motor (not shown) and a cam mechanism that converts the rotation of the swing motor into a swing motion and transmits the swing motion to the main column 13. It consists of a motion conversion mechanism (not shown).

The heater body 12 mainly includes a casing 23, a protection bar 24, a sheathed heater 21, and a reflection plate 22. The casing 23 is a substantially rectangular parallelepiped member having a substantially rectangular opening on the front surface. The protection bar 24 is a safety fence provided on the front surface of the casing 23. The sheathed heater 21 is a heating element disposed in the casing 23. The reflection plate 22 is disposed behind and on the side of the sheathed heater 21 and reflects the heat of the sheathed heater 21 forward. The main body column 13 is disposed behind the heater main body 12. Further, the main body column 13 has a gap of 50 mm or less (see FIG. 3) between the heater main body 12 in a state where the elevation angle α of the heater main body 12 is not attached (that is, the heater main body 12 and the main body column 13 are parallel). are arranged at the reference clearance C _2).

  The heater angle changing mechanism 14 is interposed between the heater main body 12 and the main body column 13 (more specifically, between the central portion in the longitudinal direction of the heater main body 12 and the upper portion of the main body column 13). It has a depression angle changing function and a vertical / horizontal changing function. The elevation angle changing function refers to the elevation angle of the heater body 12 (see the heater body 12 illustrated by the elevation angle α and the two-dot chain line in FIG. 3) and the depression angle (the depression body β illustrated in FIG. 1 and the two-dot chain line). This is a function to change The vertical / horizontal changing function is a function of changing the vertical / horizontal direction of the heater body 12 (see the heater body 12 illustrated by the rotation angle γ and the two-dot chain line in FIG. 4). The heater angle changing mechanism 14 is, for example, via a first axis (not shown) extending in the left-right direction that pivotally supports the rear surface of the central portion of the heater body 12 and a second axis (not shown) extending in the front-rear direction. And a mechanism that supports the main body support 13.

[Internal configuration of heater body]
As shown in FIGS. 6 to 8, the electric stove 1 of the present embodiment includes two temperature fuses (overheat protection elements) 31 and 32, an ON / OFF switch 41, a timer 42, and the like inside the heater body 12. ing.

  As shown in FIGS. 6 and 7, the thermal fuse 31 is in the vicinity of the upper end portion inside the heater body 12 when the heater body 12 is vertically oriented (solid line shown in FIG. 4), and the ON / OFF switch 41. And in the vicinity of the timer 42. The thermal fuse 31 is used to cut off the power supply to the sheathed heater 21 when the ambient temperature rises to a predetermined temperature, and the operating temperature (heat resistant temperature) is 119 ° C.

  As shown in FIGS. 6 and 8, the thermal fuse 32 is near the upper end portion inside the heater body 12 when the heater body 12 is turned sideways (broken line shown in FIG. 4), and on the back side of the reflector 22. And the casing 23. Similarly to the thermal fuse 31, the thermal fuse 32 is used to shut off the power supply to the sheathed heater 21 when the ambient temperature rises to a predetermined temperature, and has an operating temperature of 154 ° C. Yes. The operating temperature of the thermal fuse 32 is different from that of the thermal fuse 31 because the mounting position of the thermal fuse 32 is immediately behind the reflector 22, and the temperature is higher than the mounting position of the thermal fuse 31 even during normal times. Is taken into account.

  In addition, the operating temperature of the thermal fuses 31 and 32 is set to a temperature lower than the temperature inside the heater main body 12 when the cloth obtained by performing an ignition experiment with a cloth covering the front surface of the heater main body 12 ignites. It is set to be. As a result, even when cloth is applied to the heater body 12, the thermal fuses 31 and 32 are activated before the cloth is ignited to shut off the power supply to the sheathed heater 21. Can be prevented. Further, since the temperature fuses 31 and 32 are positions where the temperature easily rises when a towel or the like is applied so as to cover the front surface of the heater body 12, how the direction of the heater body 12 changes together. But it is always on the top.

  As shown in FIG. 9A, the thermal fuse 31 has an operating part 31a, a flag-type terminal 31b, and a wiring 31c. The operation part 31a corresponds to the main body part of the thermal fuse, and when the predetermined operation temperature is exceeded, the internal wiring is divided to interrupt the flow of electricity. The flag-type terminal 31b is connected to a conductivity controller (not shown) and a wiring 31c divided into two hands, one of which is electrically connected to the timer 42 via the ON / OFF switch 41 and the other via the operating unit 31a. Is done. The wiring 31c is a silicon rubber glass braided wire.

  As shown in FIG. 9B, the thermal fuse 32 has an operating part 32a, a housing 32b, and a wiring 32c. The operating part 32a corresponds to the main part of the thermal fuse, similarly to the operating part 31a. When the operating temperature exceeds a predetermined operating temperature, the internal wiring is cut off to interrupt the flow of electricity. The housing 32b is fixed in a state where the thermal fuse 32 and other lead wires are electrically connected. Similar to the wiring 31c, the wiring 32c is a silicon rubber glass braided wire.

  Further, as shown in FIGS. 6 to 8, the thermal fuses 31 and 32 are attached to the inside of the heater main body 12 by fixtures 33 and 34. Specifically, as shown in FIGS. 6 and 7, the thermal fuse 31 is attached to the top plate of the heater body 12 while being held by the fixture 33. On the other hand, as shown in FIG. 8, the thermal fuse 32 is attached to the back surface side of the reflecting plate 22 while being held by the fixture 34.

  As shown in FIGS. 10 (a) and 10 (b), the fixtures 33, 34 have holding portions 33a, 34a, plate portions 33b, 34b, and screw holes 33c, 34c. The holding portions 33a and 34a are formed by bending a metal plate into a circular shape, and hold the thermal fuses 31 and 32 inside the circular portion. The plate portions 33b and 34b are metal plates in which screw holes 33c and 34c are formed. When the plate portions 33b and 34b are attached to the inside of the heater body 12, screws are fitted and fixed.

  The temperature fuses 31 and 32 are actually connected to the sheathed heater 21, the ON / OFF switch 41, the timer 42, and the like by electrical wiring, but in the drawing, the electrical wiring is omitted for convenience.

[Features of this electric heater]
(1)
The electric stove 1 of this embodiment includes thermal fuses 31 and 32 inside the heater body 12.

  Here, during operation of the electric stove 1, for example, when a cloth such as a towel is applied so as to cover from the top of the heater body 12 to the front surface, the cloth is ignited by heat from the sheathed heater 21 and the reflector 22. There is a risk. At this time, since the heat from the sheathed heater 21 or the like is not easily released to the outside before the cloth is ignited, the temperature inside the heater body 12 rapidly increases.

  Therefore, in the electric stove 1 of the present embodiment, in order to monitor the rise in the internal temperature of the heater body 12, when the internal temperature of the heater body 12 exceeds a predetermined operating temperature, power is supplied to the sheathed heater 21. Temperature fuses 31 and 32 are provided.

  As a result, even if the user accidentally puts a towel or the like on the heater body 12 during operation of the electric stove 1, the temperature fuses 31 and 32 are activated before the towel or the like is ignited to supply power to the sheathed heater 21. Can be prevented in advance, so that firing of towels and the like can be prevented. As a result, a highly safe electric stove capable of preventing the occurrence of fire can be provided.

(2)
In the electric stove 1 of the present embodiment, as shown in FIG. 4, the thermal fuse 31 corresponds to the upper end portion inside the heater main body 12 in the vertical orientation in response to the heater main body 12 changing in the vertical and horizontal orientation. The thermal fuse 32 is attached to a position corresponding to the upper end portion in the heater main body 12 in the horizontal direction.

  Thereby, when a towel etc. are put on the heater main body 12, since the temperature rise in the heater main body 12 can be monitored in the position where the temperature of the heater main body 12 is most likely to rise, a safer electric stove can be used. Obtainable.

(3)
In the electric stove 1 of the present embodiment, as shown in FIG. 4, the heater angle changing mechanism 14 changes the vertical and horizontal orientations of the heater body 12.

  Here, the position corresponding to the upper end portion of the heater main body 12 changes. However, in the electric heater 1 of the present embodiment, the heater main body 12 is in a position corresponding to the upper end portion in any direction. Are equipped with thermal fuses 31 and 32. For this reason, the temperature rise in the heater main body 12 can be reliably monitored, and ignition of a towel or the like applied to the heater main body 12 can be prevented.

(4)
In the electric stove 1 of the present embodiment, two thermal fuses 31 and 32 are mounted, and the respective operating temperatures are different.

  Here, the temperature inside the heater body 12 during normal operation varies depending on the position. For this reason, in the electric heater 1 according to the present embodiment, a difference is provided in the respective operating temperatures depending on the temperature during normal operation at the mounting position of the thermal fuses 31 and 32. Thereby, regardless of the position in the heater body 12 where the temperature fuse is attached, the temperature rise in the heater body 12 when the towel or the like is put on the heater body 1 is reliably detected to ignite the towel or the like. Can be prevented.

(5)
In the electric heater 1 of the present embodiment, the thermal fuses 31 and 32 are fixed so as to be suspended from the mounting position while being held by the fixtures 33 and 34.

  As a result, the thermal fuses 31 and 32 are disconnected from the reflector 22 and the like, which rise in temperature during normal operation, so that the temperature rise in the heater body 12 can be accurately detected without being affected by the surface temperature. Can be detected.

[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

(A)
In the above embodiment, the temperature fuses 31 and 32 have been described with the electric stove 1 disposed near the upper end when the heater body 12 is oriented vertically and near the upper end when the heater body 12 is oriented horizontally. However, the present invention is not limited to this.

  For example, when the heater body 12 is fixed obliquely, it may be provided near the upper end of the heater body 12 in that case.

  Moreover, in the said embodiment, as shown in FIG. 4, since the heater main body 12 only rotated 90 degree | times, it was not necessary to attach, but when the heater main body 12 has a mechanism which rotates 360 degree | times. May be provided with thermal fuses on each side of the heater body 12.

(B)
In the above embodiment, the electric stove 1 in which one thermal fuse is mounted on each of the upper ends of the heater body 12 when the heater body 12 is in the vertical direction and the horizontal direction has been described as an example. However, the present invention is not limited to this.

  For example, an electric stove provided with two or more thermal fuses on the side surface (upper end portion in the horizontal direction) of the heater main body 12 shown in FIG. 7 may be used. In this case, even when the temperature rise when the heater body 12 is in the horizontal direction is different in the horizontal direction of the heater body 12 in the horizontal direction, by arranging a plurality of temperature fuses, it is possible to ensure that the temperature fuse before firing the towel or the like. Can be activated.

(C)
In the said embodiment, the example using the temperature fuses 31 and 32 as shown to Fig.9 (a) and FIG.9 (b) was mentioned and demonstrated. However, the present invention is not limited to this, and the shape and configuration are not particularly limited.

  The electric stove of the present invention has the effect of preventing the firing of towels and the like even when a towel or the like is put on the front surface of the stove, and thus can be widely applied to heating appliances and the like having a heating element. is there.

It is the perspective view which looked at the electric stove of one Embodiment concerning this invention from the front side. It is the perspective view which looked at the electric stove of one Embodiment concerning this invention from the rear surface side. It is a side view of the electric heater of one embodiment concerning the present invention. It is a front view of the electric heater of one embodiment concerning the present invention. It is a top view of the electric heater of one embodiment concerning the present invention. The sectional side view which shows the structure inside the heater main-body part of the electric stove of FIG. FIG. 2 is a front cross-sectional view showing an internal configuration of a heater main body portion of the electric stove in FIG. 1. XX arrow sectional drawing in FIG. 6 and FIG. (A), (b) is a figure which shows the structure of a thermal fuse. (A) is a front view which shows the attachment tool of the thermal fuse of FIG. (B) is the side view.

DESCRIPTION OF SYMBOLS 1 Electric heater 11 Stand base 12 Heater main body 13 Main body support | pillar 14 Heater angle change mechanism 15 Motor swing mechanism 16 Handle 16a Grip part 16d Groove part 21 Sheath heater (heating element)
22 Reflector 31, 32 Thermal fuse (overheat protection element)
31a, 32a Actuating portion 31b Flag terminal 32b Housing 31c, 32c Wiring 33, 34 Attachment (hanging tool)
33a, 34a holding portion 33b, 34b plate portion 33c, 34c screw hole 41 ON / OFF switch 42 timer C _1, C ₂ gaps α, δ, ζ angle

Claims (6)

A heating element (21);
A reflector (22) for reflecting the heat of the heating element (21) forward;
A casing (23) for housing the heating element (21) and the reflector (22);
An overheat protection element (31, 32) that is arranged inside the casing (23) and shuts off the power supply to the heating element (21) when the ambient temperature exceeds a predetermined temperature;
A rotation mechanism (14) for changing the vertical and horizontal orientations of the casing (23) ;
With
The overheat protection element (31, 32) includes a first heating protection element (31) disposed in the vicinity of an upper end when the casing (23) is in the first form by the rotation mechanism (14), When the longitudinal direction of the casing (23) is in a second form that is substantially perpendicular to the longitudinal direction of the casing (23) in the first form by the rotating mechanism (14), A second heating protection element (32) disposed,
Electric stove (1). The first overheat protection element (31) and the second overheat protection element (32) have different heat-resistant temperatures,
Electric stove (1) according to claim 1. The overheat protection elements (30a, 30b) are attached in a state of being withdrawn from the heater main body (12).
Electric stove (1) according to claim 1 or 2 . The overheat protection element (30a, 30b) is a thermal fuse.
Electric stove (1) according to any one of the preceding claims. A heating element (21), a reflection plate (22) for reflecting the heat of the heating element (21) forward, and a casing (23) to which the heating element (21) and the reflection plate (22) are attached. A heater body (12) having;
An overheat protection element (30a, 30b) which is disposed inside the heater body (12) and cuts off the power supply to the heating element (21) when the ambient temperature exceeds a predetermined temperature;
A rotation mechanism (14) for changing the vertical and horizontal orientations of the heater body (12) ;
With
The overheat protection elements (30a, 30b) are arranged so as to be arranged in the vicinity of the upper end of the heater body (12), regardless of whether the heater body (12) is set in the vertical or horizontal direction. Provided ,
Electric stove (1). The plurality of overheat protection elements (30a, 30b) have different heat resistant temperatures,
Electric stove (1) according to claim 5 .

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