JPS634905Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an electric heater for an air conditioner.
A plurality of insulator mounting holes with one end open are provided in a plurality of insulator mounting plates arranged in parallel, and insulators each having a pair of flanges are inserted and fixed into these mounting holes, and a bare wire coil is supported on these insulators. related to electric heaters.

Conventionally, as described in Japanese Utility Model Publication No. 45-1266, a plurality of insulator mounting plates having insulator mounting holes are arranged side by side, an insulator is fixed to each of the mounting holes of these mounting plates, and further, these Electric heaters in which bare wire coils are successively supported by an insulator are already known.

By the way, in the electric heater configured in this way,
Conventionally, the insulator was fixed to the insulator mounting plate in the eighth to first steps.
The procedure was as shown in Figure 0 and described below.

That is, a plurality of insulator mounting holes 51 with one end open are formed in the insulator mounting plate 50, while a pair of flanges 52a protrude in mutually orthogonal directions at both ends.
52b, with a bare wire coil in the center (not shown)
An insulator 52 is formed with an insertion hole 52c through which the flanges 52a and 5 are inserted (see FIG. 7).
2b, and then the closing plate 53 having a width b is attached to the insulator 52.
, the mounting plate 50 is inserted from the open side of the mounting hole 51.
, and press this closing plate 53 against the mounting plate 5.
The insulator 52 was fixed to the mounting plate 50 by spot welding the insulator 52 to the mounting plate 50.

However, with this configuration, the mounting hole 5
Since the wide closing plate 53 having a width b is used to close the open side of the insulator 52 and fix the insulator 52, the width c of the mounting plate 50 becomes large, and as a result, the electric heater The problem was that the size of the vehicle was increasing.

The present invention was devised to solve the above-mentioned conventional problems, and the purpose is to devise the shape of the open end of the mounting hole in the mounting plate,
The insulator can be attached to the fixed plate by engaging a rod-shaped body with the open end and the flange on one side of the insulator, thereby reducing the width of the mounting plate. The object of the present invention is to make it possible to miniaturize the electric heater.

Therefore, the configuration of the present invention is to provide a plurality of insulator mounting holes with one end open in a plurality of insulator mounting plates arranged in parallel, and to insert and fix insulators each having a pair of flanges into these mounting holes. The electric heater is such that a bare wire coil is supported by these insulators, and the insulator mounting plate has a bend on the open side edge of the mounting hole extending in the direction of one side flange of the insulator that is inserted into the mounting hole. A rod-like body is provided inside the bent edge to engage with one side flange of the insulator to fix the insulator to the mounting hole, The open side of the mounting hole is closed by a small rod-shaped body, so that the insulator can be fixed.

An embodiment of the present invention will be described below based on the drawings.

What is shown in FIGS. 1 and 2 is an air conditioner equipped with an electric heater according to an embodiment of the present invention.

In the figure, 1 is a casing of the air conditioner, and the inside of the casing 1 is partitioned by a partition plate 2 to form an air conditioning chamber 3 on the front side and a machine room 4 on the back side. Further, an inlet 5 and an outlet 6 for indoor air are formed on the front side of the casing 1 facing the air conditioning room 3, while an inlet (not shown) for introducing and discharging outside air is formed on the back side facing the machine room 4. ) and an air outlet 7 are formed.

The air conditioning room 3 is provided with an evaporator 8, an electric heater 9 and an indoor fan 10, which will be described in detail later according to the present invention, and a fan guide 11.
are provided to form intake and outlet air passages 13 and 14 for introducing and discharging indoor air.

The machine room 4 also includes a condenser 15, an outdoor fan 16, and the outdoor fan 16 and the indoor fan 10.
A coaxial motor 17 and a compressor 18 that rotate the
has been set up.

Note that the evaporator 8, condenser 15, and compressor 18 form a refrigerant circuit.

The electric heater 9 has a large number of insulator mounting plates 21 provided with a plurality of insulator mounting holes 20, and these mounting plates 21 are arranged in parallel.
0, insulators 22 are fixed to the insulators 20, and bare wire coils 23 are supported by these insulators 20.The details are as follows.

That is, as shown in FIG. 6, the insulator mounting plate 21 is a long and thin plate having a plurality of rectangular notches with one end open at predetermined intervals in the longitudinal direction to form a plurality of insulator mounting holes 20. Further, an L-shaped bent edge 24 is formed on the side edge of the mounting plate 21 on the open side of the mounting hole 20.

Further, the other side edge of the mounting plate 21 with respect to the open side edge is also bent into an L-shape to form a reinforcing edge 25. Further, step portions are provided at both ends in the longitudinal direction of the mounting plate 21, and a rod-shaped body 26 (to be described later) is attached to the step portion.
A bendable projecting edge 27 is provided to hold the rod-shaped body, while a fixing part 28 is provided by extending both longitudinal ends of the reinforcing edge 25 outward, and the rod-shaped body is attached to the fixing part 28. A locking hole 29 for locking 26 is formed.

On the other hand, the insulator 22 is the same as the conventional one,
As shown in FIG. 7, it has a shape in which a part of a cylindrical body is cut out, and more specifically, an insertion hole 30 through which the bare wire coil 23 is inserted is formed in the center.
A pair of flanges 31 and 32 having two protruding edges protruding in opposite directions at both ends and whose protruding directions are orthogonal to each other are formed, and the outer shape is square between these flanges 31 and 32, and the A fitting portion 33 is formed in which the insulator mounting hole 20 and one side projecting edge of the flange 31 on one side are fitted so as to face the open side of the mounting hole 20.

As shown in FIGS. 3 to 5, the insulator 22 configured in this manner has a flange 31 in the mounting hole 20 on one side of the insulator 22 facing the open side of the mounting hole 20 with respect to the mounting plate 21. The fitting portion 33 is inserted and fixed so as to be located on the bent side of the bent edge 24.

In other words, the bent edge 24 is placed on the open side edge of the insulator mounting hole 20 in the mounting plate 21,
It is formed so as to extend in the direction of the flange 31 on the one side of the insulator 22 that is inserted into the mounting hole 20.

Furthermore, it is made of a 2φ stainless steel rod, with both ends bent in two stages, and first, second, and third locking parts 3 are attached to the ends.
6, 37, 38, said elongated rod-shaped body 26
After inserting the insulator 22 into the mounting hole 20, this rod-shaped body 26 is placed along the mounting plate 21 inside the bent edge 24 and all the fixed insulators. It is arranged so as to be engaged with one of the projecting edges of the flange 31 on one side of the flange 22. At the same time, the first locking portions 36 of the rod-shaped body 26 are positioned so as to be engageable with the outer surfaces of the fitting portions 33 of the insulators 22 at both ends of the plurality of insulators 22 attached to the mounting plate 21. The second locking portion 37 is positioned opposite to the projecting edge 27 of the mounting plate 21, and
7, the second locking portion 37 is held between the mounting plate 21 and the third locking portion 37 is held between the second locking portion 37 and the mounting plate 21.
The tip of the locking portion 38 is inserted into the locking hole 29 of the mounting plate 21, and the rod-shaped body 26 is attached to the mounting plate 2.
It is fixed at 1.

In this way, the insulator 2 installed in the mounting hole 20
2, by inserting the fitting part 33 into the mounting hole 20, movement in the left-right direction (direction of arrows A and B) and downward direction (direction of arrow C) in FIG.
The other flange 32 prevents the insulator 22 from moving in one direction in the front-rear direction (arrow 2 direction in FIG. 3), and the movement of the insulator 22 in the upward direction in FIG. Due to the engagement with the rod-shaped body 26 on the upper surface of the fitting portion 33 of the insulator 22, the rod-shaped body 26 is received by the bent edge 24 and blocked, while The movement indicated by the arrow in FIG. It is blocked via the rod-shaped body 26 or by being directly received by the mounting plate 21.

In this way, the insulator 22 can be reliably fixed to the mounting hole 20.

Further, the rod-shaped body 26 is connected to the first locking portion 36.
The movement in the directions of arrows A and B in FIG. This also prevents rotation, so there is no chance of it falling off from the mounting plate 21.

Although the third locking portion 38 and the locking hole 29 may not be provided, they are provided to ensure that the rod-shaped body 26 is supported on the mounting plate 21.

As described above, a plurality of the mounting plates 21 having a plurality of insulators 22 fixed to them are arranged in parallel so that the insulators 22 fixed to the mounting plates 21 face each other, and the fixing portions 28 at both ends of these mounting plates 21 are arranged side by side. The insulator 3
9 to the fan guide 11 and the casing 1, respectively.

Furthermore, one or several bare wire coils 23 are attached to the insulator 22 attached to the adjacent mounting plate 21.
The bare wire coils 23 are sequentially inserted and supported through the insertion holes 30 of the mounting plate 21, and the bare wire coils 23 are arranged in parallel in a plurality of stages in a direction perpendicular to the mounting plate 21.

As described above, in this embodiment, the rod-shaped body 26 made of a small-diameter stainless steel rod is used, and the attachment hole 26 is
Since the open side of the mounting plate 2 is closed so that the insulator 22 can be fixed to the mounting hole 20, the mounting plate 2
1 can be made smaller, and therefore the overall size of the electric heater 9 can also be made smaller. Furthermore, the depth H of the air conditioner can also be reduced,
Furthermore, the air resistance in the air suction passage 13 due to the mounting plate can also be reduced.

Furthermore, since no special work such as welding is required to attach the rod-shaped body 26 to the mounting plate 21, the number of work steps can be significantly reduced.

Furthermore, since the rod-shaped body 26 can be easily removed from the mounting plate 21, the insulator 22 can be easily replaced if it is damaged.

As described above, in the present invention, one side flange 31 of the insulator 22 that is inserted into the mounting hole 20 is attached to the open side edge of the mounting hole 20 in the insulator mounting plate 21.
A bent edge 24 extending in the direction of
Since the rod-shaped body 26 is provided to engage with the insulator 22 and fix the insulator 22 to the mounting hole 20, the width c of the mounting plate 21 can be reduced.
The size of the entire device can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a plan sectional view of an air conditioner to which an embodiment of the electric heater according to the present invention is applied, FIG. Figure 4 is an enlarged partial front view of the same, Figure 5 is an enlarged side sectional view of the same, Figure 6 is an enlarged partial front view of the mounting plate, Figure 7 is an enlarged perspective view of the same insulator, and Figure 8 is an enlarged partial front view of the same. FIG. 9 is a partial front view showing the main parts of the conventional example, FIG. 9 is a partial plan view of the same, and FIG. 10 is a partial front view showing the same mounting plate. 20...Insulator mounting hole, 21...Insulator mounting plate, 2
2... Insulator, 23... Bare wire coil, 24... Bent edge, 26... Rod-shaped body, 31, 32... Flange.

Claims (1)

[Scope of utility model registration request] A plurality of insulator mounting holes 20 with one end open are provided in a plurality of insulator mounting plates 21 arranged in parallel, and insulators 22 having a pair of flanges 31 and 32 are inserted and fixed into these mounting holes 20, respectively. An electric heater in which a bare wire coil 23 is supported on an insulator 22, and one side of the insulator 22 that is inserted into the mounting hole 20 is placed on the open side edge of the mounting hole 20 in the insulator mounting plate 21. A rod-shaped member is formed with a bent edge 24 extending in the direction of the flange 31 and engages with one side flange 31 of the insulator 22 on the inside of the bent edge 24 to fix the insulator 22 to the mounting hole 20. An electric heater for an air conditioner, characterized in that a body 26 is provided.