JPH0644061Y2 - Electric heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION “Industrial Application Field” The present invention relates to an electric heater for heating and cooking foods, for example, a magnetron or an electric heater and a combination thereof.

“Conventional Technology” Conventionally, there is a technology of providing a heating chamber in which an object to be heated is provided, installing a magnetron and an electric heater, and heating food by high frequency from the magnetron or radiant heat from the heater.

"Problems to be solved by the invention" In the conventional technology, when the heater case is fixed to the heater case in which the heater is installed, the heater case becomes heavy and the heater case is fixed to the heating chamber. There is a problem in that it is necessary to perform screw fixing work while supporting a heavy heater case, and assembly work is extremely troublesome.

"Means for Solving the Problems" However, the present invention relates to an electric heater including a heating chamber and a heater case mounted behind the heating chamber, in which the rear end edge of the upper plate of the heating chamber is bent upward. A hook that is fixed to the upper end of the rear plate of the heating chamber and that is locked to the fixing portion from above is provided on the upper end of the heater case, and the heating chamber is fixed to the heating chamber with a screw. It has a structure that can be locked to.

[Operation] Therefore, since the heater case is locked to the heating chamber before being screwed, it is not necessary to support a heavy heater case when screwing, and the fixing part of the heating chamber that locks the heater case is not required. Since the upper surface plate and the rear surface plate of the heating chamber are overlapped and connected and fixed, sufficient strength for supporting a heavy object such as a heater case can be obtained, and the fixing portion is provided in the heating chamber. On the other hand, since the hook is located at the upper edge of the heater case, the hook can be easily locked to the fixed portion, that is, the heater case can be easily locked to the heating chamber. As the fixed part, the upper end of the heater case is locked to the fixed part from above, so the locking operation is extremely easy. Also, the heater case is locked without rattling in the tilting direction, and the screwing posture is achieved just by locking. Can be secured The positioning of the screw fixing of the heater case is only required to be performed in the horizontal direction, and the heater case can be horizontally moved with a small force in the lateral direction in the locked state, and the horizontal positioning of the screw fixing of the heater case is easily performed. It becomes possible to efficiently attach a heavy heater case in a mass production line. Moreover, since the heater case can be attached to the heating chamber without any gap, it is possible to send hot air directly from the heater case to the heating chamber. is there.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. First
The figure is an explanatory view of the main part, FIG. 2 is an external perspective view, FIG. 3 is a plan explanatory view, and FIGS. 4 and 5 are side explanatory views. Opening and closing the door (1) for loading and unloading the object to be heated. It is freely attached and a cubic heating chamber (2) is formed inside the door (1).

Further, a high-frequency generator (3) having a built-in magnetron or the like is arranged outside the right side of the heating chamber (2), and a waveguide (5) is provided on the upper surface of the upper plate (4) of the heating chamber (2). At the same time, the stirrer (7) is rotatably attached to the lower surface side of the upper surface plate (4) substantially at the center through the stirrer cover (6), and the high frequency from the generator (3) is diffused by the stirrer (7). The heating chamber (2) is irradiated with light.

Further, an upper heater (8) which is an electric heater and a rear heater (9) are provided, the upper heater (8) is attached to the outer peripheral side of the stirrer cover (6), and the heating chamber (2) is radiated by the upper heater (8). ), The heater case (11) is fixed to the outside of the rear plate (10) of the heating chamber (2), and the rear heater (9) is provided inside the heater case (11).

Further, the blower motor (12) is attached to the rear surface of the heater case (11) via a motor bracket (13), and a blower fan (14) and a cooling fan (15) driven by the motor (12) are provided. A blower fan (14) is installed inside the heater case (11), and the air heated by the rear heater (9) is blown into the heating chamber (2) from the ventilation hole (10a) of the rear face plate (10). ), While the cooling fan (15) air-cools the motor (12).

Furthermore, a front chassis (17) for connecting the top plate (4) and the bottom plate (16) of the heating chamber (2) to the rear plate (10) is provided, and the chassis (17) has a hinge (18). ), The rear plate (10) and the front chassis (17) are erected and fixed on the bottom chassis (19) and the lower end edge is connected to the bottom chassis (19). (20) covers the rear surface side of the heater case (11) and the like, and the left and right sides of the heating chamber (2) and the like by an outer peripheral cover (21) connected to the surface chassis (17) and the rear cover (20). It is configured to cover the upper side.

Further, a motor mounting hole (22) is opened in the rear cover (20), the rear part of the blower motor (12) is projected to the outside of the cover (20) through the hole (22), and the external shape is a truncated pyramid. The motor cover (23) having the motor is formed, the motor cover (23) is integrally fixed to the edge of the mounting hole (22) by spot welding or caulking, and the motor (12) is fixed to the motor cover (23). Install internally.

Further, a plurality of ventilation holes (24) are formed on the peripheral surface and the rear surface of the motor cover (23), and the air after the cooling of the motor (12) by the cooling fan (15) is discharged from the ventilation holes (24). At the same time, the rear center of the motor cover (23) is projected rearward, and a protrusion (25) for forming a gap is provided at the center of the rear face of the motor cover (23). The parts (25) are brought into contact with each other to prevent the ventilation hole (24) of the motor cover (23) from being blocked by the side wall (26).

Further, a power transformer (27) is installed on the upper surface of the bottom chassis (19) below the high frequency generator (3). Also,
Both ends of a mounting frame (28) that is bent in a U shape are fixed to the inner surface of the rear cover (20), and a cooling motor (29) is attached to the inner surface of the U shape of the frame (28). A cooling fan (30) driven by 29) is arranged on the U-shaped intermediate outer surface side of the frame (28), and the cooling fan (30) is surrounded by a high frequency generator (3).
And a guide plate (31) for sending cooling air to the power transformer (27) is fixed to the U-shaped intermediate outer surface of the frame (28).
Then, the outside air is sucked by the cooling fan 30 through the openings (32) of the rear cover (20) and the openings (33) of the frame (28) to generate the generator (3) and the transformer (27).
Is air-cooled.

Further, the electrolytic capacitor (34) is fixedly mounted on the upper surface of the U-shaped lower end of the mounting frame (28), and the power supply wiring board (35) and the motor bracket (36) are fixed to the U-shaped upper end of the frame (28). The power supply cord (37), which is fixed to the side upper surface and penetrates the upper corner of the rear cover (20) and is pulled in, is connected to the board (35), while the stirrer motor (38) is attached to the motor bracket (36). ),
The stirrer (7) is rotated by the motor (38) via the belt (39).

Further, the control line board (40) is mounted at a height substantially equal to the U-shaped upper surface of the mounting frame (28) and the upper surface of the upper plate (4) of the heating chamber (2), and at the right side of the door (1). The operation plate (41) is arranged side by side. The door opening button (42) and the start button (43) are arranged side by side at the bottom of the front side of the operation plate (41), and the timer dial (44) is arranged above it.
A high-frequency output control image (45) is attached to the upper part, and a heater temperature control image (46) is attached to the upper part, and the rear heater button (47), the mixed heating button (48), the high-frequency output button (49), and the upper part are attached. The heater buttons (50) are arranged side by side on the top of the operation plate (41), and the buttons (47) to (50) are arranged.
The light emitting diode (5
1) The indicator (52) incorporating the ... is fixed.

In addition, the push switches (53) (54) (55) (56) and the switching relays (57) (58) that are interlocked with the buttons (47) to (50) are connected to the control wiring inside the operation plate (41). The high frequency generator (3) and the heaters (8) are arranged on the upper surface of the substrate (40) and the push switches (53) to (56) corresponding to the buttons (47) to (50) are operated to operate the high frequency generator (3) and the heaters (8).
(9) is configured to operate.

Further, as shown in FIGS. 1 and 6, the rear edge (4a) of the upper plate (4) is bent upward, and the upper edge of the rear plate (10) is moved to the rear side of the rear edge (4a). Connected and fixed by spot welding, and the rear edge (4a) of the top plate (4)
And hooks (60) (60) to be locked from above to the joint fixing portion (59) of the upper edge of the rear plate (10) and the heater case (1).
It is made continuous with the upper edge of 1).

Then, the hook (60) is locked to the joint fixing part (59) to suspend the heater case (11) outside the rear plate (10), and after positioning the heater case (11), the heater case (11) is positioned. Are fixed to the rear plate (10) with screws (61).

"Effects of the Invention" As is apparent from the above embodiments, the present invention has a heating chamber (2).
And an electric heater including a heater case (11) mounted behind the heating chamber (2), wherein the heating chamber (2)
The upper end plate (4) of the heating plate (4) is bent upward so as to be fixed to the upper end of the rear plate (10) of the heating chamber (2) and to be hooked to the fixing portion (59) from above. Is provided on the upper end of the heater case (11), and the heater case (11)
Has a structure that can be locked to the heating chamber (2) before being fixed to the heating chamber (2) with screws. Before fixing the heater case (11) to the heating chamber (2) with screws, Since it is locked, it is not necessary to support the heavy heater case (11) when screwing, and the fixing part (59) of the heating chamber (2) for locking the heater case (11) is fixed to the heating chamber ( Since the upper surface plate (4) and the rear surface plate (10) of 2) are formed by overlapping and connecting and fixing, it is possible to obtain sufficient strength for supporting heavy objects such as the heater case (11), and Since the fixing portion (59) is located on the upper edge of the heating chamber (2) and the hook (60) is located on the upper edge of the heater case (11), the hook (60) is locked to the fixing portion (59). Heating chamber (2)
The heater case (11) can be easily locked with respect to the eye, and the upper edge of the heating chamber (2) is used as the fixed portion (59), and the upper end of the heater case (11) is fixed to the fixed portion (59). Since it is locked from above, the locking operation is extremely easy, and the heater case (11) is locked without rattling in the tilt direction, and the screwing posture can be secured simply by locking. Positioning of screws is only required to be performed in the left / right direction, and the heater case (11) can be moved horizontally with a small force in the locked state, making it easy to position the screws in the heater case (11) in the left / right direction. It is possible to efficiently attach a heavy heater case (11) in a mass production line, and since the heater case (11) can be attached to the heating chamber (2) without any gap, 11) From the heating chamber The effect is that hot air can be sent directly to (2).

[Brief description of drawings]

FIG. 1 is an explanatory view of an essential part showing an embodiment of the present invention, FIG. 2 is an external perspective view, FIG. 3 is a plan explanatory view, FIGS. 4 and 5 are side explanatory views, and FIG. FIG. (2) …… Heating chamber (4) …… Top plate (10) …… Rear plate (11) …… Heater case (59) …… Fixed part (60) …… Hook (61) …… Screw

Claims (1)

[Scope of utility model registration request] 1. An electric heater comprising a heating chamber (2) and a heater case (11) mounted behind the heating chamber (2), wherein a rear edge of a top plate (4) of the heating chamber (2) is provided. The hook (60) is bent upward and fixed to the upper end of the rear plate (10) of the heating chamber (2), and a hook (60) to be engaged with the fixing portion (59) from above is provided on the upper end of the heater case (11). An electric heater characterized in that it is provided with a structure that can be locked in the heating chamber (2) before fixing the heater case (11) to the heating chamber (2) with screws.