JPS5952335B2 - Heater for hot air fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heater for a hot air machine, in which a heater wire 3 is connected between a discharge port 2 of a hot air machine main body 1 and a fan of a motor.
In a hot air machine that blows hot air by disposing a heater block 4 to which a heater block 4 is attached, a vertical substrate 6 is attached to both ends of the horizontal substrate 5 perpendicularly to the horizontal substrate 5, and the edges of both substrates 5 and 6 are attached. The present invention relates to a heater for a hot-air machine, characterized in that a heater block 4 is formed by winding a heater wire 3 around the heater wire 3.

FIG. 1 shows the structure of a conventional heater block 7 used in a hot air fan or the like having a rectangular cross-sectional air passage. As shown in the figure, a large number of holes 7 are provided in a laminated mica substrate 8, a plurality of these substrates 8 are constructed as shown in the figure, and a coiled heater wire 3 is arranged to pass through these holes 9. However, in the structure shown in FIG. 1, the heater wire 3 must be assembled by inserting it into the hole 9 of the board 8 one by one, and the heater wire 3 is folded at the folded portions 10 of the outer surface of the board 8 on both sides. There was a problem in that a part of the board had to be stretched to fit along the outer surface of the board 8, making it very difficult to assemble. Furthermore, the second
As shown in the figure, a cross-shaped board 12, which is commonly used in conventional hair dryers, is attached to an air passage 11 having a rectangular cross section.
In this case, the heater wires 3 cannot be distributed in the four corner portions 13 of the air duct 11 as shown in the figure, and therefore the air temperature at these corner portions 13 is lower than in other parts, and the air temperature is lower than that of the entire air duct 11. There was a problem of poor temperature distribution.

The present invention has been provided in view of the above-mentioned points, and aims to uniformize the air temperature distribution by distributing heater wires as uniformly as possible in the air passage of the hot air fan body, and to improve the ease of assembly. The present invention provides a heater for a wind machine.

Embodiments of the present invention will be described in detail below with reference to the drawings.

In the figure, 1 is the main body of a hot air fan used for drying hair after washing, drying small clothes, heating the room, etc. in a room such as a changing room in a bathroom.
6 is used, and a suction port 14 for sucking in air is formed on both sides, and a discharge port 2 for discharging cold air or hot air is formed on the front surface. A heater wire 3 is disposed inside the hot air fan body between a motor, a fan connected to the motor, and a discharge port 2.
A heater block 4 consisting of the like is provided. 15 is a switch provided on the front of the hot air fan body 1;
Reference numeral 5 is for controlling the strength of the air blowing and turning on/off the power supply to the heater wire according to the motor speed.

As shown in FIG.
The cross section is rectangular or oval, corresponding to the rectangular shape of. As shown in FIGS. 4 and 5, the heater block 4 has a horizontally elongated shape to correspond to the shape of the air passage. 5 is a horizontal substrate having insulation properties, and 6 is a vertical substrate having insulation properties.

Vertical substrates 6 are perpendicular to both ends of the horizontal substrate 5, and a cut is made approximately at the center of each, and the substrates are sandwiched between each other to be supported and fixed. Reference numeral 17 denotes notches provided on the left and right sides and upper and lower sides of both the substrates 5 and 6, and the heater wires 3 are arranged in two layers on both substrates 5 and 6 at different levels as shown in FIG. 5b. This was provided to configure the system.

Further, a large number of grooves 18 are formed on the edges of both substrates 5 and 6, into which the heater wires 3 are engaged. To explain the case where the heater wire 3 is wound around the horizontal board 5 and the vertical board 6, first, as shown in FIG.
In order to switch between 00W and 1KW, two 20Ω heater wires 3 are connected in parallel, and the thermostat 20 and temperature fuse 19 are connected in series, and each terminal is connected to I as shown in the figure.
,ll,llll. Then, as shown in FIG. 5a, two heater wires 3, 3 are separated from the end of the thermostat 20 via a temperature fuse 19 and a thermostat 20 from the common terminal 1, and one heater wire 3 is connected to the side. The heater wire 3 is wound from the groove 18a of the notch 17 of the substrate 5 to the grooves 18b, C of the vertical substrate 6 and the groove d of the horizontal substrate 5, and another heater wire 3 is wound from the groove 18A of the horizontal substrate 5 to the groove 18C of the vertical substrate 6. grooves 18B, C, horizontal substrate 5
The two heater wires 3 are wound in every other groove 18 so that the two heater wires 3 are alternately locked in the grooves 18 to form terminals 11 and 111, respectively. Further, in order to linearly wind the heater wire 3, the grooves 18b and 18C located on the upper side of the vertical substrate 6 are shifted in position. Furthermore, the grooves 18B and 18C located on the lower side of the vertical substrate 6 are shifted in position. However, the upper groove 18b of the vertical board 6 and the other vertical board 6
The lower groove 18B is at the same position with respect to the horizontal board 5,
Similarly, since the groove 18C of the vertical substrate 6 and the groove 18C of the other vertical substrate 6 are at the same position with respect to the horizontal substrate 5, both the vertical substrates 6,
By forming the vertical substrates 6 symmetrically with respect to the horizontal substrate 5, it is possible to construct the same component by combining the vertical substrates 6, 6 in opposite directions. In this way, even if the positions of the grooves 18 on both boards 6, 6 are shifted, the vertical board 6 can be constructed from the same parts, simplifying the parts.
Moreover, when winding the heater wire 3 around both substrates 5 and 6, the groove 1
By shifting the positions of the groove 18 and the heater wire 3
can be wound in a straight line without large meandering lines. Further, as shown in FIG. 5b, the heater wires 3 installed on both edges of the horizontal substrate 5 and the upper and lower edges of the vertical substrate 6 are installed in a curved manner, and the bending position Q of the heater wires is
to be closer to the corner of the ventilation duct,
For example, the heater wire 3 should be placed uniformly on the air passage with a rectangular cross section.
This means that the air temperature distribution can be made uniform. Further, if it is necessary to eliminate the deflection of the heater wire 3 or the instability of the position caused by the deflection depending on the size of the air passage, three or more vertical substrates 6 may be used. The heater wire 3 may be coiled or straight. thermo switch 20
is placed on the side board 5 on the side of the discharge port 2, that is, in front of the heater wire 3 of the heater block 4 and where the heater wire 3 is bent at the end. At times, the temperature rise of the heater wire 3 is sensitively sensed to take safety measures for the hot air fan body 1 and the people using it.

The heater wires 3 are provided in two stages, one on the outside and one on the inside, with the front side facing inside and the rear side facing outside. Therefore, the temperature fuse 19 is placed at approximately the same height as the inner heater wire 3 and is floating below the outer heater wire 3 from the surface of the horizontal board 5, so that the temperature fuse 19 is positioned so that the thermoswitch 20 is directly below. If an abnormality occurs in which the motor stops while the main body of the wind blower is placed, the abnormality can be quickly detected by directly receiving the rising airflow from the inner heater wire 3. It is also conceivable to provide the temperature fuse 19 on the rear side of the heater wire 3 at approximately the same height as the outer heater wire 3, but in this case, the dimension at the rear of the heater wire 3 becomes larger by the space for installing the temperature fuse 19. As a result, the heater block 4 has the disadvantage of becoming large in size, so it cannot be adopted. As described above, in the present invention, the vertical substrate is attached to both ends of the horizontal substrate perpendicularly to the horizontal substrate, and the heater wire is wound around the edges of both substrates. Since both ends of the vertical board are close to each other, the curved part of the heater wire can be brought close to the corner of the air passage, and for example, the heater wire can be arranged uniformly in an air passage with a rectangular cross section. This has the effect of making the air temperature distribution uniform, and since the heater wire is simply wound around the edges of both boards, it is not necessary to pass the heater wire through the hole in the board as in the conventional construction. Therefore, the heater wire can be easily wound and the assembly efficiency is improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional heater block, Fig. 2 is a sectional view of another conventional example, Fig. 3 is a perspective view of a hot air fan main body according to an embodiment of the present invention, and Fig. 4 is a perspective view of the same heater block as above. figure,
Figures 5A, b, and c are a plan view, front view, and side view of the same as above, and Figure 6 is an electric circuit diagram of the heater block of the same as above, where 1 is the hot air fan body, 2 is the discharge port, 3 is the heater wire, and 4 is the electric circuit diagram of the heater block. 5 is a heater block, 5 is a horizontal board, and 6 is a vertical board.

Claims (1)

[Claims] 1. In a hot air machine that blows hot air, which has a heater block with heater wires attached between the outlet of the hot air machine body and the fan of the motor, a vertical board is installed at both ends of the horizontal board, perpendicular to the horizontal board. 1. A heater for a warm air machine, characterized in that the heater block is formed by attaching the substrates and winding heater wires around the edges of both substrates.