JPS6145707Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an on-vehicle air blower that generates a slight air flow near a temperature-sensing element in order to accurately detect the temperature inside a vehicle interior in an on-vehicle air conditioner. be.

Conventionally, in order to control the temperature inside the vehicle,
Even if a temperature-sensing element is installed inside the vehicle, there is little air convection, and the control temperature tends to be uneven due to the influence of side radiation heat, making it difficult to control the temperature with high precision. Instead, it detected the temperature at the air conditioner outlet and controlled the temperature inside the vehicle. However, there was a difference between the temperature felt by the human body, and it was not possible to adequately control the temperature.

The present invention solves these conventional problems and enables detection at a temperature close to the temperature felt by the human body inside the vehicle, and will be explained below using the drawings in Figures 1 to 5. .

Fig. 1 shows a schematic configuration of an on-vehicle air blower according to the present invention, in which the rotating part has radial blades 4 fixed to a rotating shaft 3 of an H-shaped rotating body 2 with a magnet 1 arranged at the end. The rotary shaft 3 is rotatably supported at both ends by bearings 5. When this rotating part rotates, the air is pushed out by the radial blades 4, and the central part acts to suck in air, and the air is sucked in from outside through the suction cylinder 6. , which creates a constant air flow. A temperature sensing element is placed in front of this suction cylinder 6 at a certain distance. Further, even if the rotating body 2 rotates in the opposite direction, the blades 4 have a symmetrical radial shape, so that the flow of air to be sucked remains constant. Here, the guider 7 is installed to prevent a vortex from being generated in front of the blade 4 and reduce the suction force of the air, and to increase the suction efficiency. In addition, 8 is the magnet 1
A coil consisting of an output coil and a position detection coil arranged at a position to cut off the magnetic field of the rotating body 2 at startup.
It is a magnet that gives rotational force to.

Next, the rotational operation of the vehicle-mounted air blower according to the present invention and its activation when the power is turned on will be explained with reference to FIGS. 2 and 3.

Fig. 2 shows an example of the processing circuit of the in-vehicle air blower of the present invention, where _L1 is an output coil, _L2 is a position detection coil, _C1 , _C2 , _C3 are capacitors, R is a resistor, Tr is a transistor and _D1 is a diode.

In this circuit, an output coil L ₁ and a position detection coil L ₂ that generate a voltage when the magnets 1 pass are fixed at positions where the magnetic fields of the four magnets 1 attached to the rotating body 4 are cut off.

Now, when current flows through the output coil _L1 , a magnetic field is created that attracts the magnet 1 attached to the rotating body 2. Due to this attraction force, the rotating body 2 passes through the output coil _L1 and attempts to rotate due to inertia force. When this position detection coil _L2 cuts off the magnetic field of the magnet 1 attached to the rotating body 2, a voltage is generated in this position detection coil _L2 .
This forces the transistor Tr to be cut off, and the attractive force of the output coil _L1 disappears.
However, when the rotating body 2 passes the position detection coil _L2 , the transistor Tr enters the active region again.
Current flows to the output coil _L1 and is attracted. Here, if the inertial force is made larger than the attraction force, the rotating body 2 repeats the rotational movement. Although an example using suction force has been described here, it is also possible to rotate using repulsion force.

Next, regarding startup when the power is turned on, an example will be shown in which rotation is performed using suction force.

The magnitude of the attractive force generated by the coil 8 varies depending on the stationary position of the rotating body 2, and the inertial force also varies depending on the stationary position. Now, if the rotating body 2 is stationary close to the coil 8, the rotating body 2 is attracted by the attractive force, but since it is close, there is not enough inertial force, so it passes the coil 8 once, but then starts rotating in the opposite direction again due to the attractive force of the coil 8. This is repeated several times, and when the inertial force overcomes the attractive force,
Rotation starts. However, if it is too close, the attractive force is stronger, and the rotor 2 stops in a state where it is attracted by the coil 8. On the other hand, if it stops at a position far from the coil 8, the attractive force is weak and it may not rotate at all even when the power is turned on. However, even if it is far away, if it starts to be pulled by the attractive force, it approaches the coil 8, so the attractive force increases and accelerates, and a large inertial force is obtained all at once and it starts to rotate. In this way, the rotor 2 may or may not automatically rotate when the power is turned on, depending on its stationary position. As an example, the position where the coil 8 and the rotor 2 can start rotating is shown in Figure 3. This range is determined by the strength of the magnet, the attractive force generated in the coil, and the rotation torque. Therefore, in this invention, in order to ensure that the stationary position of the rotor 2 is always within the range where it can start rotating, the magnet 9 is placed in the stationary part at a position 90° off the range where it can start rotating, and it is repelled by the magnet 1. In this case, the strength of the magnet 9 needs to be weak enough that it repels the magnet 1 and the stationary position of the rotor 2 is always within the range where it can start rotating.
If the repulsive force is too strong, the rotation torque of the rotor 2 will increase, causing the rotation speed to drop and the air flow to become weak. The position of the magnet 9 may be any position shifted by 90 degrees from the repulsive position mentioned above, and attraction may be utilized, or a magnetic body may be placed in place of the magnet 9 so that the magnet 1 is attracted.

FIG. 4 shows a specific structure of a vehicle-mounted air blower according to an embodiment of the present invention. In the figure, 10 is a lower case, 11 is an upper case, and the lower case 10 has a fitting hole 10a. Further, the upper case 11 is provided with a fitting claw 11a that fits by press-fitting into the fitting hole 10a,
The fitting claw 11a is fitted into the fitting hole 10a, and the screw 1 is inserted into the hexagonal screw 12 attached to the lower case 10.
It can be firmly fixed by tightening according to No. 3.

Reference numeral 14 denotes an H-shaped rotating body with four magnets 15 arranged at its ends, and this rotating body 14 is fixed to a rotating shaft 17 that is rotatably supported by a bearing 16 provided in the lower case 10. The rotary shaft 17 is fixed to a rotating shaft 17, and radial blades 18 are fixed to the rotating shaft 17. 19 is a printed circuit board, and on this printed circuit board 19,
The position at which the magnetic field of the magnet 15 disposed on the rotary body 14 is cut, that is, the position detected by the coil 20 consisting of an output coil and a position detection coil disposed between the H-shaped rotary body 14, and the position detection coil Processing circuit section 21 that flows current to the output coil according to the current
is incorporated, and its printed circuit board 19
is attached to the lower case 10 by the hexagonal screw 12.

22 is a power input cord pulled out from the processing circuit section 21, and is connected to the side plate 10b of the lower case 10.
It is pulled out to the outside through a notch provided in the.

Reference numeral 23 denotes a magnet attached to the side plate 10b of the lower case 10, and as explained above, this magnet 23 rotates the rotating body 14 to a range where it can start rotating when the rotating body 14 is started.

Here, the upper case 11 is integrally provided with a suction cylinder 11b and a guider 11c for sucking air through the rotation of the blades 18, and a discharge port 11d for releasing the sucked air. A partition frame 11e is integrally provided to separate the rotating parts such as the rotating body 14 and the blades 18 from the processing circuit part 21 to prevent loss of air flow.

Reference numeral 24 denotes a mounting bracket attached to the upper case 11. Further, a bearing 16 provided in the lower case 10
As shown in FIG. 5, a highly hard jewel 16a is disposed at a portion in contact with the rotary shaft 17 and at a point contact portion at the tip of the rotary shaft 17. That is, by hardening the rotary shaft 17 to increase its hardness, wear of the contact portion is extremely reduced.

As is clear from the above description, the on-vehicle wind blowing device of the present invention provides the following effects.

(1) The resting position of the rotating body is always at a constant position due to the repulsion of the magnetic material or magnets, so when the power is turned on, the rotating body always rotates automatically, although the direction of rotation is not determined. Further, since the blades have a radial shape, a constant flow of air can be obtained regardless of the direction of rotation.

(2) By installing this device near the temperature-sensing element, air flows near the temperature-sensing element, making it less susceptible to the effects of radiant heat, improving accuracy, and improving the temperature inside the vehicle. The temperature sensing element for temperature control can detect temperatures close to those felt by the human body, improving the performance of the automatic air conditioner.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a vehicle-mounted air fan device according to the present invention, Fig. 2 is an electric circuit diagram of the device, Fig. 3 is an explanatory diagram for explaining the operation of the device at startup, and Fig. 4 The figure is a perspective view showing a state in which the upper case of a vehicle-mounted wind blower according to an embodiment of the present invention is removed;
FIG. 5 is a sectional view showing the main parts of the device. 1, 9, 15, 23... Magnet, 2, 14... Rotating body, 3, 17... Rotating shaft, 4, 18... Vane,
6, 11b... Suction cylinder, 8, 20... Coil, 10... Lower case, 11... Upper case, 21
...processing circuit section, _L1 ...output coil, _L2 ...position detection coil.

Claims (1)

[Claims for Utility Model Registration] (1) A rotating body with a magnet attached, an output coil fixed at a position that cuts off the magnetic field of the magnet attached to the rotating body, and a position where a voltage is generated by the passage of the magnet. a processing circuit that causes a current to flow through the output coil based on the voltage generated by the detection coil; a blade that is attached to the rotating body and has a structure that attracts wind from an axial direction and releases the wind in a radial direction; and a blade that is attached near the magnet. and a magnetic body or a magnet that maintains the stationary position of the rotating body at a predetermined position. (2) An in-vehicle device according to the scope of utility model registration claim (1) that uses a case equipped with a partition frame that separates the processing circuit from the rotating body to which the magnet is attached, the blades and the coil, and the processing circuit. Air raising device for use.