JPS59217444A - Warm air generating machine - Google Patents

Abstract

PURPOSE:To obtain the small-sized electric warm air generating machine capable of obtaining sufficient warm air without the pressure loss of blow-off air by a method wherein a ventilating fan is arranged in the cylinder of cylindrical heating body generating heat by conduction of electric current and a multitude of ventilating holes are provided on the side surface of the cylinder. CONSTITUTION:At least two places of the side surface of cylinder of the cylindrical heating body 2, heating by the conduction of electric current, are provided with a multitude of ventilating holes 2b, the fan 3 is arranged in the cylinder so as to ventilate from the inside of the cylinder of the heating body 2 to the outside thereof through the ventilating holes 2b, and a motor 4 to drive the fan 3 are provided in the machine. Heating of the ventilating air and the regulation of blow-off directions are permitted simultaneously by providing a multitude of ventilating holes having the regulating function for the blow-off air at the side surface of cylinder of the cylindrical heating body heating by the conduction of electric current, and a large-sized blow-off air deflecting part, which has been a problem in the conventional machine, becomes unnecessary, whereby the small-sized warm air generating machine may be obtained as a whole. On the other hand, sufficient warm air without pressure loss may be obtained by determining the opening area of the ventilating holes and the thickness of cylinder of the heating body properly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small electric hot air fan used as an auxiliary heating device for an automobile, for example.

BACKGROUND ART Conventionally, some small electric warm air fans for vehicles are installed in a steering column section of a driver's seat and blow hot air from two directions toward both hands of a passenger.

In this case, considering the visibility of the meter and the influence on driving operation, the hot air fan is required to be as small as possible. However, in order to blow in two directions with conventional hot air blowers,
It is necessary to provide a large blowout direction deflection section, and the pressure loss of the deflection section causes problems such as an increase in the size of the device and a large amount of noise.

Furthermore, JP-A-54-72506 discloses a fan that uses the fan itself as a heating element, but a slip ring or the like must be used to supply power to the rotating heating element, and hot air can be obtained. Therefore, since a large current is required, there are problems with the durability and stability of the slip ring.

Therefore, the present invention takes the above points into consideration and provides a blower fan by disposing a ventilation fan inside the cylindrical shape of a cylindrical heating element that generates heat when energized, and by providing a large number of ventilation holes in the side surface of the cylinder. The purpose is to provide a small electric warm air fan that can produce sufficient hot air with no wind pressure loss.

The present invention will be explained below with reference to embodiments shown in the drawings.

In this embodiment, the hot air fan 1 of the present invention is applied to an auxiliary heating device for the driver's seat of an automobile. Figures 1 and 2 show the hot air fan 1 of this embodiment installed above the steering column of the driver's seat. Indicates the condition. Arrow A in Figures 1 and 2
, B are arranged so that the hot air is blown out in the direction of direction and toward the driver's hands holding the steering wheel. ”1
In addition to the above, the hot air fan 1 may be installed in the hollow part of the steering shaft that does not rotate, or it can be installed in the hollow part of the steering column where it does not rotate.
YoG).

Fig. 3 shows a schematic configuration of this warm air fan, and the upper surface of the case 1, which is made of heat-resistant resin, has a circular air intake port 1a.
A fan guard (not shown) is provided at the suction port 1a to prevent dust, foreign matter, etc. from entering the case. Inside the case l below the inlet 1a, there is an inlet 1a.
A cylindrical heating element 2 having an inner diameter larger than the inner diameter of the heating element 2, an axial fan 3 disposed inside the cylinder of the heating element 2, and a motor 4 connected to the fan 3 to drive the axial fan 3. The electrode part member 5.6 is attached to the inner bottom surface of the case 3, as will be described in detail later. In addition,
The heating element 2 and the motor 4 are electrically connected to a lead wire 7, as will be explained in detail later.

In addition, rectangular hot air outlets 1b are provided on both sides of the case 3, and warm air is directed slightly diagonally through each outlet 1b, as shown by arrows A and B in FIG. A partition part 1c that vertically divides each air outlet 1b into
is integrally molded with case 1.

Next, the mounting conditions of the heating element 2, the fan 3, the motor 4, and the electrode members 5 and 6 will be explained.

Zunawa 1) As shown in Fig. 4, the resin axial fan 3 is provided with four pieces 132, with a mounting hole 3b in the center.
is perforated. The output shaft 4a of the motor 4 is inserted into the attachment hole 3b, and is attached to the fan 3 by a NAND 8. The ends of the blades 3a of the fan 3 have a slight gap with the inner circumferential wall 2a so as not to come into contact with the inner circumferential wall 2a of the heating element 2 and to obtain sufficient air blowing efficiency. The output shaft 4a is rotatably provided at the upper end of a cylindrical coil case 4b of the motor 4, and lead wires 4c and 4d are exposed at the lower end of the coil case 4b, and are connected to an electrode member 5, which will be described later. Connected. The heating element 2 is made of barium titanate-based porcelain formed into a cylindrical shape and has a positive resistance-temperature characteristic in which the electrical resistance rapidly increases when the set temperature is reached. Here, as shown in FIG. 3, on the cylindrical side surface of the heating element 2 facing each of the air outlets 1b provided on both side surfaces of the case 1, there are a plurality of rectangular ventilation holes penetrating the inside and outside of the cylinder. 2b are perforated in a direction perpendicular to the cylindrical side surface so that they are parallel to each other. Here, when the heating element 2 is assembled to the case 1, the portion where the ventilation hole 2b of the heating element 2 is perforated is the air outlet 1b provided on both sides of the case 1.
The hot air is blown out from the ventilation holes 2b in a straight direction toward the respective air outlet 1b, and the opening area of the ventilation holes 2b is as follows. Determined so that there is no pressure drop. Further, the thickness L between the cylindrical inner wall 2a and the outer wall 2C is determined from a resistance value that provides the required amount of heat generation. Cylindrical inner wall 2a of heating element 2
Silver paste is baked onto the surface of the wall 2C of the beam 1 to form an electrode. Silver paste was not applied to the upper end 2d of the cylinder 2, the lower end (not shown), and the ventilation hole 2b of the cylinder 2.

An insulating ring 9 molded from a heat-resistant resin material is disposed below the heating element 2 so as to abut the cylindrical lower end of the heating element 2. The inner diameter and outer diameter of this insulating ring 9 are equal to the inner diameter and outer diameter of the heating element 2, respectively. Below the insulating link 9 are metal first and second electrode members 6.5.
is installed. That is, the insulating ring 9 prevents short circuit between the first electrode member 6 and the second electrode part 5. The electrode members 5 and 6 are both formed in the shape of a partially cut ring, and the first electrode member 6 is arranged inside the second electrode member 5, and between the electrode members 5 and 6 an insulating ring 9 and a heat generating member are connected. The body 2 is held under pressure.

That is, the inner peripheral surface 5a of the second electrode member 5 contacts the outer peripheral surface 9a of the insulating ring 9 and the lower end outer peripheral direction 2C of the heating element 2, and the outer peripheral surface 6a of the first electrode member 6 contacts the inner peripheral surface 9a of the insulating ring 9. It comes into contact with the peripheral surface 9b and the lower end inner peripheral surface 2a of the heating element 2. Further, inside the ring of the electrode member 5.6, the lead wires 4c, 4. A terminal 5b16b for connecting d is formed, and in the assembled state, the glass 5b faces the terminal 6b.

At this time, a part of the first electrode member 6 has a cut portion 6e so as not to interfere with the terminal 5b of the second electrode member 5.

Also, the outer side of the ring of the electrode member 5.6' 4:
+;1 heating element6. Power supply, -□, 6. A, 0.6o Ka3
, are formed at positions substantially perpendicular to the glasses 5b and 6b, respectively, and in the assembled state, the terminal 5C is aligned with the terminal 6.
It faces b. These terminals 5c and 6c have holes 5f for assembling the electrode member 5.6 to the case 1.
, 6f are provided respectively. Note that in the assembled state, the lower end surface of the insulating ring 9 is held by the terminal 5b of the second electrode member 5 and the terminal 6c of the first electrode member 6.

Further, the insulating ring 9 may be held by appropriately increasing the number of holding parts other than the above as needed. Further, for insulation between the first electrode member 6 and the second electrode member 5, in addition to an insulating ring, necessary portions may be insulated.

Fig. 5 shows a state in which the fan 3, motor 4, heating element 2, insulating ring 9, and electrode member 5.6 are assembled. The diagrams are shown in FIG. 6 and FIG. 7, respectively.

As mentioned above, the heating element 2 and the electrode members 5 and 6 are sandwiched together by fitting, but a conductive adhesive mainly made of silver is applied to the contacting surfaces of each to ensure electrical and mechanical Aiming to improve the bonding strength.

As shown in FIG.
The motor 4 is attached to the case 1 with a screw 13 and a nut 12.

Next, the operation of this embodiment having the above configuration will be explained.

A DC power supply (not shown) is connected to the electrode part 5 by a lead wire, and when a switch (not shown) is turned on, the heating element 2 and the motor 4 are energized in parallel via the electrode plate 5. At this time, a voltage is applied to the heating element 2 so that, for example, the glass 5C is a positive voltage and the terminal 6C is a negative voltage, a current flows from the outer wall 2C of the cylinder serving as the heating element toward the inner wall 2a and generates heat. On the other hand, a voltage is applied to the motor 4 between terminals 5b and 6b to drive the fan 3, and the fan 3 rotates. Due to the rotation of the fan 3, the ambient air sucked into the case 1 from the inlet 1a of the case 1 is heated as it passes through the ventilation hole 2b provided on the cylindrical side of the heating element 2, and becomes warm air. , arrow A in FIGS. 1, 2, and f63 from the air outlet 1b provided on both sides of the case 1,
As shown in B, the air is blown out toward the driver's seat.

In this case, the heating element 2 not only heats the blown air (
The plurality of ventilation holes 2b rectify the blown air and have a guide function that determines the blowing direction of the hot air. Therefore, for example, unlike the above example, if the blowing direction of the ventilation hole 2b is formed slightly obliquely with respect to the blowing outlet 1b,
The partition IC provided at the air outlet 1b in the above-mentioned embodiment becomes unnecessary, and the hot air fan as a whole can be made smaller accordingly.

In addition, if it is desired to make the hot air blowing direction variable, the partition IC may be molded separately from the case 1, and the partition IC may be rotatably attached to the case 1.
It should be installed on.

Further, although the ventilation holes 2b provided in the heating element 2 are arranged parallel to a certain blowing direction, they may be formed radially from the center of the cylinder, and the portion where the ventilation holes 2b are provided can be arranged in various ways. An appropriate location may be selected depending on the case, or it may be provided throughout the cylinder.

In addition, the hot air fan of the present invention is not limited to 2, automobiles, for example,
It can also be effectively applied to household hair dryers and the like.

As described above, in the present invention, a large number of ventilation holes having a function of rectifying the blown air are provided on the cylindrical side surface of the cylindrical heating element that generates heat when energized, thereby controlling the heating and blowing direction of the blown air. Since rectification can be performed at the same time, there is no need for a large blowout air deflection section, which was a problem in the past, and the hot air fan as a whole can be made smaller. Furthermore, by appropriately adjusting the opening area of the ventilation holes and the thickness of the cylindrical portion of the heating element, it is possible to obtain sufficient hot air without pressure loss.

In addition, in the second invention, the electrode member is an electrode that conducts current to the heating element, and at the same time has the function of mechanically holding the heating element, so the number of components is reduced and the manufacturing process is reduced. This has the effect of reducing costs.

[Brief explanation of the drawing]

1. Fig. 1 is a top view showing the warm air fan of the present invention installed in the driver's seat of a car, Fig. 2 is a side view of Fig. 1, and Fig. 3 is a partial cross-sectional schematic diagram showing the structure of the blower of the present invention. , FIG. 4 is a perspective view of the components of the hot air fan of the present invention,
FIG. 5 is a perspective view of the main parts of the hot air fan of the present invention, FIG. 6 is a cross-sectional view taken along line MM in FIG. 5, and FIG. 7 is a cross-sectional view taken along line N-N in FIG. 5. 2... Heating element, 2b... Ventilation hole, 3... Fan,
4... Soter, 5... Electrical 2 electrode member, 5c... Terminal, 6... Electrical 1 electrode member, 5c... Terminal. Representative Patent Attorney Takashi Okabe Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] A hot air machine characterized by comprising a fan provided inside the cylinder to blow air from the inside of the cylinder to the outside of the cylinder, and a motor provided to drive the fan. (2) Energization. A cylindrical heating element that receives heat and generates heat; a large number of ventilation holes provided in at least two places on the cylindrical side surface of this cylindrical heating element; a fan provided inside the cylinder to blow air; a motor provided to drive the fan; a ring-shaped first electrode member fitted into the inner peripheral surface of the lower cylindrical ring of the heating element; It is characterized by comprising a ring-shaped fn2 electrode member fitted into the outer peripheral surface of the cylindrical lower end of the heating element, and terminals provided on the first and second electrode members so as to energize the heating element. Hot air machine