JPH0968350A - Electric appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure the safety against possible ignition of an electrical equipment to be built in a body case. SOLUTION: In an electric appliance in which a body case 1 made of synthetic resin has an operation panel 4, and electrical equipment 61, 62 to be operated by operators 61b, 62b arranged on the face side of the operation panel 1 are fitted to the back side of the panel 4, a non-combustible fireproof sheet 65 (blocking member) is provided between the operation panel 4 and the electrical equipment 61, 62 and the upper inner surface of the body case 1 is covered from the electrical equipment 61, 62 with the sheet 62. When the electrical equipment 61, 62 are ignited by any chance, the fireproof sheet 65 blocks the fire from spreading to the upper part of the body case 1, and the body case 1 is made of synthetic resin whose fire-resistant grade is low.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric device such as a warm air electric heater which blows heat generated by a so-called ceramic heater for heating.

[0002]

2. Description of the Related Art In an electric device using a ceramic heater as a heat source, even if a fire occurs due to a spark of a contact part of an electric component arranged on the rear surface of an upward operation panel or a connection failure of a terminal part, In order to prevent the adverse effect caused by this, the technology in which the operation panel is made of a highly flame-retardant synthetic resin and the shielding wall surrounding the electrical equipment is integrally provided on the back surface of this panel is the applicant of the present invention. And has already filed as Japanese Patent Application No. 5-42092.

With such a structure, even if the electric component is ignited by a spark or the like, there is no fear that the operation panel directly above it will be thermally deformed or spread, and the back surface of the operation panel is protected by the shielding wall. It is excellent in that it can limit the spread of flames along it and prevent thermal deformation and fire spread of the upper part of the synthetic resin main body case in contact with the operation panel.

In an electric device using a ceramic heater as a heat source, the lower part of the main body case made of synthetic resin is
It is known that a heater unit is built in, and heat generated by a heater included in the unit is blown to perform heating. In this warm air electric heater, the heater unit has a flame-retardant synthetic resin heater case and a ceramic heater housed in the case, and a plurality of terminals of the ceramic heater are energized. The lead wire for is connected. These connections are made by caulking a terminal metal fitting to the end of the lead wire, spot welding to one end of the relay metal fitting to this metal fitting, and caulking the other end of the relay metal fitting to the terminal of the ceramic heater. Has been done. The relay fitting is provided to keep the lead wire away from the ceramic heater and protect the insulating coating from heat. The lead wire side portion of the terminal portion of the ceramic heater formed by the connection is conventionally provided outside the heater unit, and in this portion, the ceramic heater is installed so as to extend in the width direction of the main body case. Due to the above-mentioned configuration, it is arranged relatively close to the inner surface of the side wall of the main body case.

Further, the warm air type electric heater is provided with safety electric parts such as a temperature fuse, an overheat preventing thermostat and a current fuse for ensuring safety. Among them, thermal fuses and thermostats are
The current fuse, which is mounted on the outer surface of the heater case of the heater unit so as to be sensitive to the temperature of the ceramic heater, does not need to be sensitive to the heater temperature, and is built in the main body case apart from the heater unit.

[0006]

In the conventional case in which the synthetic resin forming the operation panel has high flame retardancy as described above, the operation panel is made of ABS resin or the like which has low heat resistance and therefore is inexpensive. Since it cannot be adopted, there is a problem that the cost is high.

In addition, it is considered that the risk of fire in an electric device is not limited to the electrical components mounted on the operation panel, but may also be caused by a defective connection of the terminal portion of the ceramic heater. However, conventional electrical equipment
Since the structure is not designed in consideration of such a virtual situation as described above, in the unlikely event that an ignition occurs in the exposed terminal portion which is brought close to the side wall of the main body case, thermal deformation of the main body case or There is a risk of fire spread.

[0008] Therefore, the problem to be solved by the present invention is to provide an inexpensive electric device which can ensure the safety of the electrical equipment built in the main body case against accidental ignition.

Moreover, in the warm air type electric heater, since the terminal portion of the ceramic heater is projected from the heater case as described above, the terminal portion is deformed by an external force applied through the lead wire at the time of assembly or the like. Is likely to occur, which may cause the distance between the terminal portions to become narrower than a predetermined insulation distance. Further, in the configuration of the warm air type electric heater, since the current fuse is separated from the heater unit and built in the main body case, it is necessary to attach these separately, and therefore, the built-in parts to the main body case It takes time to assemble.

[0010]

In order to achieve the above object, the invention of claim 1 has a main body case made of synthetic resin having an operation panel, which is arranged on the back side of the panel on the front side of the operation panel. In an electric device to which an electric component operated by the operated operator is attached, a nonflammable shielding member is provided between the operation panel and the electric component, and the main body case is provided to the electric component by the shielding member. It covers the inner surface of the upper part of. A non-combustible fireproof sheet or a metal plate is used as the shielding member.

In the present invention, the shielding member is interposed between the electrical equipment on the back surface of the operation panel and the operation panel and the upper part of the main body case located around it, and when the electrical equipment should catch fire, The fire is blocked from reaching the operation panel and the upper part of the main body case, and these synthetic resin parts are prevented from being adversely affected. Therefore, the main body case can be made of an inexpensive synthetic resin having a low heat resistance grade.

In order to achieve the same object, a second aspect of the present invention is a flame-retardant synthetic resin heater case and a heater unit having a heater housed in the case, and a main body case made of synthetic resin. In an electric device which is built into a heater and sends heat generated by the heater to heat the heater, a terminal housing portion is integrally provided in the heater case, and a terminal of the heater and a connection between the terminal and a lead wire are provided in the housing portion. The parts and parts are stored.

In the present invention, the terminal housing portion of the heater case accommodates the terminal portion of the heater (terminal and its lead wire connecting portion) without exposing it, so that even if an ignition occurs in the terminal portion. The fire is blocked to prevent the synthetic resin main body case around the terminal portion from being adversely affected. Further, since the terminal housing is integrated with the heater case, the number of parts and the number of assembling steps do not increase, and therefore the cost can be reduced.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A warm air electric heater according to a first embodiment of the present invention will be described below with reference to FIGS. 2 to 4, reference numeral 1 is a portable vertical installation type main body case, which is formed of a front case 2 and a rear case 3 made of ABS resin having low heat resistance and an operation panel 4.
The front and rear cases 2 and 3 are abutted at the front and rear opening ends thereof, and are passed through the screw-through boss 5 (see FIG. 5) of the rear case 3 to receive the screw-receiving boss 6 of the front case 2 (two locations in FIG. 4). (Only shown) are connected by screws (not shown) screwed together. An operation panel 4 is attached by closing an upper surface opening formed between the upper ends of the cases 2 and 3. The operation panel 4 is attached by engaging the front and rear edges of the operation panel 4 with the cases 2 and 3, respectively. In FIG. 8, reference numeral 4a denotes an engagement hole into which a not-shown claw of the front case 2 is inserted and engaged, and 4b denotes a claw that enters into and engages an unillustrated engagement hole provided at an upper edge portion of the rear case 3. Is shown.

As shown in FIGS. 3 and 4, the rear case 3 has a circular lattice-like intake port 3a. The rear case 3 is formed with an annular fan casing wall 7 projecting forward from a wall portion provided with the intake port 3a, and is located above the wall 7 to form a recess for carrying the main body case 1. A groove-shaped handle 8 is formed.

An intake grill 9 covering the intake port 3a is detachably attached to the rear case 3. This intake grill 9
An air filter 10 is attached to the inside of the. As shown in FIGS. 3 to 5, in the rear case 3, a rectangular metal base plate 11 that closes the front opening formed by the fan casing wall 7 from the front side except the lower part thereof is provided with the screw 1.
It is attached by 2. A motor 13 is attached to a substantially central portion of the base plate 11, and a motor shaft 13 a of the motor 13 penetrates the base plate 11 rearward and is inserted into an inner space of the fan casing wall 7. A centrifugal fan 14 surrounded by a fan casing wall 7 is attached to the motor shaft 13a.

A horizontally long heater unit 21 is attached to the lower portion of the rear case 3 with screws 22. As shown in FIGS. 6 and 9 to 14, the heater unit 21 includes a heater case 23, a heater 24, and a thermostat 2.
5, the temperature fuse 26, and the current fuse 27.

The heater case 23 is the heater case body 2
8 and the wind direction louver 29 are connected by a screw 30. Wind direction louver 29 is louver frame 3
1 and an outlet 32.

The heater case main body 28, the louver frame 31 of the wind direction louver 29, and the outlet 32 are both heat-resistant and flame-retardant (flame retardant of UL94-5VA or more), such as polyethylene. -Molded from terephthalate resin. Heater case body 28
Has a heater housing portion 28a (see FIG. 6) penetrating in the front-rear direction. The case main body 28 is integrally provided with a plurality of, for example, three terminal accommodating portions 33 located at one end side in the longitudinal direction of the heater accommodating portion 28a, and at the other end side in the longitudinal direction of the heater accommodating portion 28a. Current fuse mounting portion 34 is integrally provided.

As shown in FIG. 13, each terminal accommodating portion 33.
Are formed in elongated concave grooves that are opened in the front surface of the heater case body 28 and are parallel to each other. One end of each of the storage portions 33 is communicated with the heater storage portion 28a, and the other end thereof has a narrowed opening width. The current fuse mounting portion 34 is different from the heater housing portion 28a in the rib 28.
It is formed so as to be separated by b and extend in the vertical direction. The mounting portion 34 is composed of a concave groove whose front surface is opened, and lead wire insertion grooves which are opened to the front surface are provided on both end walls in the vertical direction thereof. The current fuse 27 is inserted and attached to the current fuse attachment portion 34 from the front surface thereof, and the lead wires connected to both ends of the fuse 27 pass through the lead wire insertion groove and the current fuse attachment portion 3 is attached.
4 is pulled out.

A thermostat mounting portion 35 and a thermal fuse mounting portion 36 are provided on the outer surface of the upper wall of the heater case body 28.
And are respectively provided integrally. The thermostat 25 is inserted and attached to the thermostat attachment portion 35 from the front side thereof, and the temperature fuse attachment portion 36 is also attached.
Also, the temperature fuse 26 is inserted and attached from the front side thereof.

The heater accommodating portion 28a has a built-in heater 24 which can be entirely accommodated in the accommodating portion 28a, for example, an electric resistance heating type PTC (positive temperature coefficient thermistor) heater commonly referred to as a ceramic heater. The heater 24 has ventilation in the thickness direction. Heater 24
Has three terminal portions 37 to 39 as shown in FIG. As shown in FIG. 13, these terminal portions 37 to 39 are flat plate-shaped terminals 24a to 24c integrally extended from one longitudinal end of the heater 24, and these terminals 24a to 24c.
From the terminal fittings 40a to 42a attached to the terminal portions of the lead wires 40 to 42 corresponding to 24c, and the relay fittings 43 to 45 individually connecting the corresponding terminals 24a to 24c and the lead wires 40 to 42 respectively. Become.

The terminal fittings 40a to 40c are the lead wires 40.
A first caulking portion crimped so as to embrace the insulating coating of the terminal portion of ~ 42, and a second caulking portion caulking so as to embrace the core wire protruding from the insulating coating,
And a flat plate-shaped connecting portion. One ends of the relay fittings 43 to 45 are individually superposed on the connection portions of the terminal fittings 40a to 40c and electrically and mechanically connected by spot welding. The relay fittings 43 to 45 have a crimped portion at the other end, and the crimped portion is used for the terminal 24a.
To 24c are caulked so as to individually hold them, and are electrically and mechanically connected to the terminals 24a to 24c, respectively. A rivet stop may be added to each of the connection parts as needed in order to further improve the connection reliability.

[0024] The first to third terminal portions 37-
The whole 39 is individually housed in the terminal accommodating portion 33, and each terminal portion of the lead wires 40 to 42 is drawn out from the opening of the terminal accommodating portion 33 having a reduced opening width.

Louver frame 31 of wind direction louver 29 screwed to the heater case body 28 from the front side thereof.
As shown in FIGS. 4 and 14, the first cover portion 31a covers one end in the longitudinal direction of the terminal housing portion 33 from the front surface, and the other end portion in the longitudinal direction includes the current fuse mounting portion 3.
And a second cover portion 31b for covering 4 from the front. The first cover portion 31a has a vertical rib 31a1 that presses each terminal portion 37 to 39 from the front side, and the second cover portion 31b has a horizontal rib 3 that holds the current fuse 27 from the front side.
It has 1b1. Therefore, this louver frame 3
With the screwing of No. 1, the entire terminals 37 to 39 and the entire current fuse 27 are covered with synthetic resin having excellent flame retardancy.

Further, a first pressing convex portion 46 and a second pressing convex portion 47 are integrally provided on the upper wall of the louver frame 31. The first pressing projection 46 covers the front opening of the thermostat mounting portion 35 to prevent the thermostat 25 from falling off, and the second pressing projection 47 is the thermal fuse mounting portion 36.
The front opening is closed to prevent the thermal fuse 26 from falling off.

As shown in FIGS. 12 and 14, the louver frame 31 is integrally provided with a grid-shaped guard 48 facing the heater 24, and is positioned in front of the guard 48 to blow out. 32 are stored. The outlet 32 has a plurality of louver plates that are parallel to each other, and is rotatable about a pivot 32a provided at both ends thereof so that the outlet angle of the warm air can be changed from horizontal to diagonally upward. It is provided in. 32b
11 is a convex portion for adjusting the blowing angle, and 49 in FIG. 11 is a spring plate that is in pressure contact with one pivot 32a, and the desired blow angle is maintained by frictional engagement between this and the one pivot 32a. It is like this.

In the state where the horizontally long heater unit 21 is fixed to the lower portion of the rear case 3 with the screw 22, the lead-out portions of the lead wires 40 to 42 are close to the inner surface of one side wall of the main body case 1. , Heater housing 2
The rear opening of 8a communicates with the lower side of the front opening formed by the fan casing wall 7 so that the air sent by the fan 15 is received by the heater 24. Also,
A front side portion of the louver frame 31 of the heater unit 21 is passed through an opening 2a provided in a lower portion of the front case 2.

By adopting the heater unit 21 having the above-mentioned structure, not only the thermostat 25 and the temperature fuse 26 which are safety parts but also the current fuse 27 is attached to the heater case body 28 to be incorporated in the body case 1. Therefore, it is not necessary to assemble the current heats 27 separately from the heater unit 21, and therefore the assembling can be facilitated. A rib 28b for keeping the current fuse 27 away from the heater 24 prevents the temperature fuse 27 from overheating.

In addition, each terminal portion 37-39 of the heater 24
Are individually housed and positioned in the terminal housing portions 33 corresponding to these, respectively.
1 is installed in the body case 1, the lead wire 40
Even if ~ 42 is pulled strongly, the force can be supported by the wall around the terminal housing 33. Therefore, since the terminal portions 37 to 39 are not pulled and deformed, the insulation distance required between the terminal portions 37 to 39 can be reliably maintained.

Reference numeral 50 in FIGS. 5 and 6 denotes a normally-closed tumbling switch that opens an electric circuit when the main body case 1 falls, and is connected to the current heat 27 and arranged near the heater unit 21. . And this switch 5
The rod-shaped detector 50a that can move up and down by 0 and is always urged downward is configured to vertically penetrate the bottom wall of the main body case 1 to detect the floor surface.

Further, on the back surface of the operation panel 4 exposed above the main body case 1, as shown in FIGS. 4 to 6, a timer 61 for controlling the energization time to the motor 13 and the heater 24 is provided. , And a changeover switch 62 for changing the wattage of the heater 24. These electrical components 61 and 62 are both pressed against a screw receiving boss (not shown) integrally provided on the back surface of the operation panel 4 and screwed into the screw receiving boss through the electrical components 61 and 62. It is individually fixed via 63 and 64 (see FIG. 6).

The operation shafts 61a of the electric components 61 and 62,
Each of 62a penetrates the operation panel 4 and projects to the front side thereof, and operators 61b and 62b are attached to the 62a, respectively. Therefore, the electrical components 61 and 62 can be operated from the outside of the main body case 1 via the respective operators 61b and 62b.

As shown in FIGS. 7 and 8, a noncombustible fireproof sheet 65 is provided as a shielding member between the operation panel 4 and the electrical components 61 and 62. As the fire-resistant sheet 65, a flexible sheet made of carbon fiber is adopted, which is sandwiched between the screw receiving boss (not shown) and the electrical components 61, 62. This fireproof sheet 6
The width of 5 is larger than the width of the operation panel 4, and covers the inner surface of the upper part of the main body case 1 with respect to the electric components 61 and 62 as shown in FIG.

As shown in FIG. 3, the upper end of the base plate 11 made of a non-combustible material is located directly behind the electric components 61 and 62, and forms a fire wall portion 11a for the rear case 3. Therefore, the fire-resistant sheet 65 is positioned such that its rear end portion is in contact with the fire wall portion 11a and its front portion portion is positioned so as to cover the upper back surface of the front case 2 near the electrical components 61 and 62, and between these. Is provided so as to cover the back surface of the operation panel 4 located right above the electrical components 61 and 62. In this way, electrical components 61, 62
And the front and rear sides of the main body case 1 are covered with non-combustible material. The upper side walls and the electrical components 6 located on both sides of the main body case 1 in the width direction.
A distance of 6 cm or more is provided between the fireproof sheet 65 and each of the fireproof sheets 65 and 62, and both sides of the fireproof sheet 65 are also hung between them as shown in FIG.

In FIG. 3, reference numeral 66 denotes a carbon fiber auxiliary fireproof sheet adhered to the inner surface of the front case 2. The sheet 66 includes terminals for the motor 13, terminals for the thermostat 25, and the thermal fuse 26. The terminals are opposed to each other.

FIG. 1 is a diagram showing an electric circuit of the warm air type electric heater having the above-mentioned structure, in which a timer 61 is an operating element 61b.
The common terminal 61d and the first terminal 61e during the winding time of
And between the common terminal 61d and the first terminal 61e at the same time as the winding time elapses, and at the same time, between the common terminal 61d and the second terminal 61f.
Further, the changeover switch 62 has first and second switch portions 62c and 62d, and both of the switch portions 62c and 62d are in the off state and the first switch is caused by the switching operation of the operation element 62b. This is for selecting either a state in which only the portion 62c is closed or a state in which both switch portions 62c and 62d are both on.

A series circuit in which the overturn switch 50, the current fuse 27, the temperature fuse 26, and the thermostat 25 are connected in this order is connected to one end of the power plug 67, and this circuit is a common terminal of the timer 61. It is connected to the other end of 67 of the power supply plug via 61d and the second terminal 61f. One end of the motor 13 is connected to the first terminal 61e of the timer 61, and the other end of the motor 13 is connected to the other end of the power plug 67 through the first switch portion 62c of the changeover switch 62. The common terminal portion 38 of the heater 24 is connected to the first terminal 61e of the timer 61. The terminal portion 37 of the heater 24 is connected to the connection point between the motor 13 and the first switch portion 62c, and the terminal portion 39 of the heater 24 is connected.
Is connected to the other end of the power supply plug 64 via the second switch portion 62d of the changeover switch 62.

The warm air type electric heater having the above structure is used by switching the changeover switch 62 to one of the switch-on positions and designating the time by the timer 61. Then, the motor 13 rotates the fan 14, and the heater 24 generates heat, so that air is sucked into the fan 14 through the intake grill 9 and the intake port 3a.
The air discharged from the fan 14 is guided by the inner surface of the fan casing wall 7, introduced into the heater case 23, and passed through the heater 24. Therefore, the warm air formed by the heating by the heater 24 can be blown out from the lower part of the front surface of the main body case 1 while being guided to the blowout port body 32 of the wind direction louver 29 to be used for indoor heating. The operating time in this case is determined by the designated time of the timer 61,
Further, the warm air temperature is set by the selection by the changeover switch 62 (in the selected state in which only the first switch portion 62c is turned on, only half of the heaters 24 generate heat and the second switch portion 62c is heated.
In the selected state in which d is also turned on, the entire heater 24 generates heat. ) Will be done.

In such use, when the contact portions of the timer 61 and the changeover switch 62 are opened and closed,
A spark may be generated at the contact portion, and further, a spark may be generated at the connection portion due to a poor connection of the lead wires to the electrical components 61 and 62, but even in that case, the safety is as follows. Can be guaranteed.

That is, the operation panel 4 and the electrical components 61, 6
The non-combustible fireproof sheet 65 provided between the electric component parts 61 and 62 covers the inner surface of the upper portion of the main body case 1 against the electric component parts 61 and 62. In the unlikely event that a fire occurs, the operation panel 4 and the main body case 1, especially the front case 2 which are located close to the fire.
It is possible to block access to the upper part of. Therefore, the adverse effects of ignition of the electrical components 61 and 62, in other words, the upper portions of the operation panel 4 and the front case 2 are not deformed or spread by the fire, and the operation panel 4 and the front case 2 are It is possible to reliably prevent the fire from leaking out from the joint.

The upper portion of the rear case 3, which is located close to the rear side of the electrical components 61 and 62, is the upper portion of the metal base plate 11 (fire wall portion 11a) inserted between them.
Are shielded against the electrical components 61 and 62, and the upper portions of both side walls of the main body case 1 are largely separated from the electrical components 61 and 62, so that they are adversely affected by the ignition of the electrical components 62 and 62. Does not extend.

In this way, even if the electrical components 61, 62 catch fire, their adverse effect on the upper part of the main body case 1 is prevented.
5, the main body case 1 including the operation panel 4 can be made of an inexpensive synthetic resin material such as ABS resin having a low heat resistance grade. Therefore, electrical component 6
It is possible to take necessary and sufficient safety measures at a low cost in the unlikely event of fire of 1,62.

Further, in the terminals 37 to 39 of the heater 24, there is a possibility that sparks may be generated there due to poor connection. However, the terminals 37 to 39 are respectively housed in the terminal housings 33 provided in the heater case main body 28 made of heat-resistant and flame-retardant synthetic resin, and the front openings of these housings 33. Also, since the heater case 23 is covered with the heat-resistant and flame-retardant synthetic resin louver frame 31, even if the terminal portions 37 to 39 are ignited, the fire is blocked and the terminal portion surroundings are prevented. 1 side wall of the synthetic resin main body case 1 is adversely affected by ignition at the terminals 37 to 39, in other words, the side wall of the main body case 1 is not deformed or spread by the fire, It is possible to reliably prevent the fire from leaking out from the joint of the cases 2 and 3.

Moreover, as a safety measure against the ignition of the terminals 37 to 39, the terminal housings 37 to 39 are formed integrally with the heater case main body 28, so that the number of parts and the number of assembling steps do not increase, and therefore, Safety measures can be implemented at low cost.

Further, on the inner surface of the front case 2, the motor 13
Since the auxiliary refractory sheet 66 facing the terminal portion of the thermostat 25, the terminal portion of the thermostat 25, and the terminal portion of the thermal fuse 26 is attached, a spark is generated due to a connection failure in these terminal portions, and a fire occurs. In this case, the auxiliary refractory sheet 66 can prevent the influence from directly affecting the inner surface of the front case 2 that is located close to the front case 2 and reliably prevent the front case 2 from being deformed or spread. Also in this respect, the front case 2 can be made of ABS resin having a low heat resistance grade.

As described above, in the first embodiment, the fire prevention measures are taken individually for each terminal portion of the electric parts built in the main body case 1, so that the safety against accidental ignition is more than sufficient. Can be secured.

The present invention is not limited to the first embodiment. For example, a metal plate may be used as the non-combustible shielding member instead of the fire resistant sheets 65 and 66. Further, the concept of electrical components installed on the back side of the operation panel 4 includes a printed circuit board on which circuit components such as resistors, transistors, and ICs that generate heat are mounted.
The present invention can be applied to electric devices other than the warm air heater.

[0049]

The present invention having the structure described above has the following effects. According to the electric device of claim 1, when the electric component is ignited between the electric component installed on the back surface of the operation panel and the upper part of the synthetic resin operation panel and the main body case. , Since a non-combustible shielding member is provided to prevent the fire from reaching the upper part of the operation panel and the main body case,
Since it is possible to secure the safety of the electrical components built into the main body case against ignition and the main body case can be made of a synthetic resin having a low heat-resistant grade, including the operation panel, it can be implemented at low cost.

According to the electric equipment of claim 2,
Even if an ignition occurs in the terminal part of the heater housed in the flame-retardant synthetic resin heater case, the terminal housing part that blocks the fire from reaching the synthetic resin body case around the terminal part is Since it is provided in the heater case, it is possible to secure the safety against the ignition of the electric components built in the main body case, and since the terminal housing is integrated with the heater case, the number of parts and the number of assembling steps do not increase. It can be implemented at low cost.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an electric circuit of a warm air electric heater according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a warm air electric heater according to the first embodiment.

FIG. 3 is a vertical cross-sectional side view showing the configuration of the hot-air type electric heater according to the first embodiment.

FIG. 4 is a cross-sectional plan view showing the configuration of the warm air electric heater according to the first embodiment.

FIG. 5 is a front view showing the configuration of the warm air electric heater according to the first embodiment with the front case removed.

FIG. 6 is an exploded perspective view showing a partial configuration of the warm air electric heater according to the first embodiment.

FIG. 7 is a rear view showing the operation panel of the warm air electric heater according to the first embodiment with electrical components attached thereto.

FIG. 8 is a cross-sectional view showing an operation panel of the warm air electric heater according to the first embodiment with electrical components attached thereto.

FIG. 9 is a front view showing the configuration of a heater unit of the warm air electric heater according to the first embodiment.

FIG. 10 is a plan view showing the configuration of a heater unit of the warm air electric heater according to the first embodiment.

FIG. 11 is a side view showing the configuration of a heater unit of the warm air electric heater according to the first embodiment.

FIG. 12 is a cross-sectional view showing a configuration of a heater unit of the warm air electric heater according to the first embodiment.

FIG. 13 is a front view showing the configuration of the heater unit of the warm air electric heater according to the first embodiment with the louver on the wind direction removed.

FIG. 14 is a rear view showing the configuration of a wind direction louver of the heater unit of the warm air electric heater according to the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Main body case, 4 ... Operation panel, 21 ... Heater unit, 23 ... Heater case, 24 ... Heater, 24a-24c ... Terminal 33 ... Terminal storage part, 37-39 ... Terminal part, 40-42 ... Lead wire, 40a ... 42a ... Terminal fittings, 43-45 ... Relay fittings, 61 ... Timer (electrical equipment), 62 ... Changeover switch, 61b, 62b ... Operators, 65 ... Fireproof sheet (shielding member).

Claims (2)

[Claims] 1. An electric device in which a main body case made of a synthetic resin has an operation panel, and an electric component operated by an operator arranged on the front side of the operation panel is attached to the back side of the panel. An electric device comprising a non-combustible shield member provided between the operation panel and the electrical component, and the shield member covering an upper inner surface of the main body case with respect to the electrical component. 2. A heater unit having a flame-retardant synthetic resin heater case and a heater housed in the case is built in a synthetic resin main body case, and the heat generated by the heater is blown for heating. In the electric device, the terminal case is integrally provided in the heater case, and the terminal of the heater and the connecting portion between the terminal and the lead wire are accommodated in the case.