JPS608591Y2 - Hot air supply device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a shutter mechanism of a hot air supply device suitable for a futon dryer or the like.

In hot air supply devices applied to futon dryers, etc., for example,
Two warm air outlets are provided and a shutter is attached to at least one of them.

The shutter opens and closes the corresponding hot air outlet to control the amount of hot air and improve the operating efficiency of the hot air supply device.

Conventionally, such a shutter has been configured to be held at a position that blocks the hot air outlet by a holding device using mechanical force.

However, holding devices using mechanical force generally tend to have a complicated structure, which requires a lot of effort to produce and assemble, and is also prone to breakdowns, which are troublesome to repair.

In addition, instead of the above-mentioned holding device using mechanical force, a structure in which the shutter is held by the magnetic force of a powdered sintered magnet such as ferrite may be considered, but in this structure, the magnet is likely to be brittle and fractured by the impact force when the shutter is opened and closed. It's inconvenient.

On the other hand, in a conventional hot air supply device, each heating element provided in each discharge passage is turned on and off by one common switch.

For this reason, if you close one outlet with a shutter and energize the heating element in an attempt to use only the other outlet, the heating element in the passage on the side of the shuttered outlet will also generate heat, and the unused side will become heated. passageways may overheat.
This is extremely dangerous as it may cause a fire.

This idea uses a structure in which the shutter is held by a permanent rubber magnet, which is a non-brittle material, and at the same time, when the discharge port is closed by the shutter, only the heating element in this closed discharge side passage does not generate heat, which is conventional. The purpose of this invention is to eliminate the disadvantages of the conventional hot air supply device, such as eliminating the disadvantages of using only one hot air outlet side.

That is, in this invention, a shutter for opening and closing the discharge port is disposed at the discharge port of at least one discharge side passage of a plurality of blowers simultaneously driven by one electric motor, and a shutter for opening and closing the discharge port is arranged. A limit switch is provided that turns off the heat generating circuit of a heat generating element disposed in the passage on the shutter installation side in conjunction with the operation, and is configured to hold at least one of the open and closed positions of the shutter with a permanent rubber magnet. It is a hot air supply device.

Therefore, with the above configuration, the present invention operates in conjunction with the closing operation of the shutter to turn off the heat generating circuit of the heating element in the closed discharge side passage, thereby preventing overheating of the passage. The shutter is held by magnetic force rather than by mechanical force as in the past, and the object that generates magnetic force to hold the shutter is made of a permanent rubber magnet, so it does not get damaged by the impact force when opening and closing the shutter. It is possible to provide a hot air supply device equipped with a shutter holding mechanism that generates a low level of noise caused by impact, is simple to produce and assemble, is unlikely to break down, and is easy to repair.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Figures 1 to 8, 1 and 1' are base plates installed parallel to each other at appropriate intervals, and 2 is a base plate 1.
and 1', electric motors 3 and 3' are blowers connected to the electric motor 2 across the base plates 1 and 1', respectively, and are simultaneously driven by the electric motor 2.

Reference numerals 4 and 4' are discharge side passages of blowers 3 and 3', respectively, which are attached to the upper parts of base plates 1 and 1'. Electric heaters 5 and 5' are provided as heating elements inside, and 6 and 6' The hot air outlet of 7 projects outside the main body case.

8 and 8' are air intake ports provided at the rear side of the main body case 7, 9 is a cord reel built into the rear of the main body case 7, 10 is an electric time switch that controls the air blowing time, and 11 is an electric heater 0N- Together with the OFF switch, it is fixed to a plate attached to the upper part of the base plates 1 and 1'.

Reference numeral 12 denotes a sliding plate type shutter that moves forward and backward into the discharge side passage 4 on one side to open and close the hot air discharge port 6.

The shutter 12 has a rectangular plate-shaped opening/closing part 12A and an elongated plate-shaped operating part 12B, and is slid in the vertical direction as shown by the arrow shown in FIG.

Note that 12C is an operating knob provided on the operating section 12B.

Reference numeral 13 denotes a limit switch fixed to the lower part of the base plate 1. When the shutter 12 is located at the lower end and the hot air outlet 6 is opened, the limit switch 13 comes into contact with the shutter 12 and is turned ON. The heater 5 is energized.

14 is a guide plate that is fixed to the base plate 1 and guides the movement of the shutter 12; 15 is a permanent rubber magnet that has cushioning properties and flexibility that is fixed to the external lower surface of the passage 4; when the shutter 12 is pushed up, hot air is When the discharge port 6 is closed, the suction force holds the shutter 12 in that position.

In this case, a plate portion 12D that extends horizontally toward the rear is formed on the lower edge of the opening/closing portion 12A of the shutter 12.
This plate portion 12D becomes a portion that attracts and holds the permanent rubber magnet 15.

Reference numerals 16 and 16' are sound-absorbing materials provided in the air blower suction side passages below the passages 4 and 4'.
It has a thickness approximately equal to the thickness l of .

17 and 17' are partition walls provided inside the main body case 7 to separate the air blowers 3 and 3' from the air intake ports 8 and 8', and 18 and 18' are the air blowers 3 of the respective partition walls 17 and 17'.
19 and 19' are ventilation windows provided at the front of the base plates 1 and 1'.

In the hot air supply device having such a configuration, when the electric motor 2 is driven, the blowers 3 and 3' are driven;
Air is sucked in from the air intake ports 8, 8' provided on the side surface of the main body case 7 by the suction force of the main body case 7.

The sucked air passes through a distribution path as shown by the arrow in FIG.

That is, the base plates 1 and 1, on which the electric motor 2 is installed, pass through the space between the back side of the cord reel 9 and the partition wall 17'.
′ flows from the rear to the front.

At this time, the electric motor 22 is cooled.

The air flowing to the front passes through the window 19', from the suction port of the blower 3', through the inside of the blower 3', and through the passage 4' to the hot air outlet 6.
' is discharged to the outside.

When passing through the passage 4', the air is heated by the electric heater 5' and becomes hot air.

Although FIG. 3 only shows the air circulation path on one side, the same applies to the other side.

In a hot air supply device having a distribution channel as described above,
When only one hot air outlet 6 is desired to be used, the shutter 12 attached to the other hot air outlet 6 is pushed upward.

The shutter 12 is a permanent rubber magnet 1 whose plate portion 12D has a cushioning property and is attached to the lower surface of the discharge side passage 4.
It is held under suction by 5.

Therefore, since the shutter 12 is fixed at that position, air is prevented from being discharged from the hot air discharge port 6.

Further, when opening the hot air outlet 6, a portion of the shutter 12 that is attracted and held by the permanent rubber magnet 15 is released by simply pushing down the shutter 12 lightly with the knob 12C.

Then, by lowering the shutter 12 downward, the hot air outlet 6 opens and air can be discharged.

The permanent rubber magnet 15 that attracts and holds the shutter 12 in this way is different from conventionally used powdered sintered magnets such as ferrite, and has a cushioning and flexibility sheet shape that can be press-formed and is easily processed. It's easy.

Therefore, it can be made into any shape.

The circuit diagram in Figure 4 includes an electric motor 2, electric heaters 5 and 5', an electric time switch 10, and an electric heater 0N-
The connection state of the OFF switch 11 and the limit switch 13 is shown, and the electric heaters 5 and 5' are connected to a circuit constituted by the electric motor 2 electric time switch 10 and the electric heater ON-OFF switch 11 so as to be parallel to each other. ing.

The limit switch 13 is connected in parallel with the electric heater 5 and in series with the electric heater 5.

The limit switch 13 and shutter 12 of the above circuit are linked, and as described above, the shutter 12
When closes the hot air outlet 6, the limit switch 13 turns OFF.
The F state is reached and the electricity to the electric heater 5 provided in the passage 4 is cut off.

Therefore, there is no fear that the inside of the discharge side passage 4 will become overheated when the discharge port 6 is closed.

As described above, according to the present invention, a shutter for opening and closing the discharge port is disposed at the discharge port of at least one discharge side passage of a plurality of blowers simultaneously driven by one electric motor. In addition, a limit switch is provided that turns off the heat generating circuit of a heat generating element disposed in the passage on the shutter installation side in conjunction with the closing operation of the shutter, and at least one of the open and closed positions of the shutter is held by a permanent rubber magnet. When the outlet is closed with a shutter, the limit switch that is linked to the shutter operation can cut off the electricity to the heating element in the passage on the closed outlet side, which is used when the hot air supply device is activated. Safety is improved by preventing overheating of the discharge passage on the side that is not used.

In addition, waste of electricity can be prevented and the life of the heating element can be extended, resulting in good economic efficiency.

Furthermore, there is no need for a plurality of shutter holding mechanisms as in the prior art.

In addition, permanent rubber magnets have cushioning properties and flexibility, so they do not crack, shatter, or undergo permanent deformation due to shocks caused by the lifting and lowering of the shutter, and the level of sound produced by shocks is also low. Even if the shutter mechanism has a similar shape, it can be made into a shape that suits it, so there are almost no failures, and the shutter mechanism can be designed in a wide range of ways.

[Brief explanation of the drawing]

FIG. 1 is a front view of the hot air supply device according to the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, FIG. 3 is a sectional view taken along the line B-B in FIG. The figure is a circuit diagram showing a heat generation circuit of an electric heater. 2...Electric motor, 3,3'...Blower, 4.4'...Discharge side passage, 5,5'...
...Electric heater, 6,6'...Hot air outlet, 12...Shutter, 13...Limit switch, 15...Permanent comb magnet.

Claims (2)

[Scope of utility model registration request] (1) A shutter for opening and closing the discharge port is disposed at the discharge port of at least one of the discharge-side passages of a plurality of blowers simultaneously driven by one electric motor, and a shutter for opening and closing the discharge port is provided. A limit switch is provided that interlocks to turn off the heat generating circuit of a heat generating element disposed in the passage on the shutter installation side, and a permanent rubber magnet is provided that generates a magnetic force to hold at least one of the open and closed positions of the shutter. A hot air supply device featuring: (2) The shutter is a sliding plate type shutter that moves forward and backward into the discharge side passage, and when the shutter enters the discharge side passage and closes the discharge port, a part of the shutter and a permanent rubber magnet fixed to the fixed part are connected. The hot air supply device according to claim 1, which is a utility model and is held in the closed position by adsorption.