JPH0224642Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a register device for controlling a blower, which controls the current supplied to the blower to adjust the capacity of the blower.

(Prior Art) Generally, as a method for adjusting the capacity of an air conditioner, a method is known in which a resistor device that controls the current flowing through a motor that drives a blower is connected between the motor and a power source.

This type of resistor device for blower control changes the current value supplied to the motor by changing the connections with resistors having various resistance values, thereby changing the air volume of the blower. That is, the resistor and the motor are connected by a temperature fuse between a resistance terminal derived from a circuit of the resistor and a connecting terminal. The connection terminals are optionally connected and energized in the switch mechanism to change the motor capacity. and,
If an abnormality occurs in the motor that drives the blower,
For example, if the motor is locked and the air blowing stops, and an overcurrent flows through the resistor, a large amount of heat will be generated in the resistor, but when it reaches a predetermined temperature, the temperature fuse that connects the resistor terminal and the connection terminal will close. It melts and disconnects, cutting off power to the motor.

(Problem to be solved by the invention) However, if such a temperature fuse is easily tampered with by the user, for example, once the temperature fuse has melted and the power to the motor has been stopped, the resistor device may be turned off again. Trying to use
If the user carelessly solders or connects with wire, etc., the next time an overcurrent flows, the current will continue to flow to the motor without stopping, causing damage to the motor. Wiring may burn out and cause a fire.

Therefore, the object of this invention is to provide a register device for controlling a blower in which the temperature fuse portion cannot be easily modified.

(Means for Solving the Problems) A register device for controlling a blower according to the present invention includes a heat radiation block having cooling fins, a support for supporting the heat radiation block, and a structure between the support and the heat radiation block. A circuit board of the interposed resistor, a temperature fuse connecting the resistance terminal led out from this circuit board and a connection terminal attached to the case side, and a part connected by this temperature fuse covered with the case It is characterized by consisting of a wall section provided in the.

Preferably, the support body has a foot portion that is caulked to the case, and a notch is formed in the foot portion.

Further, it is preferable that a portion surrounded by the support body serves as a ventilation path.

The fuse portion may be covered with a cover and a case.

The temperature fuse cover may be formed separately and attached to the heat dissipation block or case.

The circuit board of the resistor is not limited to being attached to the heat dissipation block by the support of the heat dissipation block, but may be attached directly to the heat dissipation block.

Alternatively, a wall portion covering the temperature fuse may be formed separately and attached to the case.

(Function) Therefore, the temperature fuse part is housed in a case,
Since the structure is such that it is not exposed to the outside, the temperature fuse cannot be easily touched by the user.

In addition, if a caulking mechanism is provided, if an attempt is made to force the opening, the caulking leg may break, making reassembly impossible.

By using the portion surrounded by the support as a ventilation path, ventilation can be improved and heat accumulation within the case can be prevented.

The temperature fuse portion housed in the case may be covered with a separate cover so that the temperature fuse portion is not exposed to the outside.

The temperature fuse cover is constructed separately and assembled into the heat dissipation block or case to facilitate manufacturing of the register device.

Attachment of the resistor to the circuit board is not limited to using a support, and a simple structure can be obtained by attaching the resistor directly to the circuit board using an adhesive, screws, or the like.

Furthermore, the cover may be attached to the case side.

(Example) An example of this invention will be described in detail below with reference to the accompanying drawings.

1 to 10 show a first embodiment of this invention. As shown in FIG. 10, a fan 2 and a motor 3 that drives the fan 2 are installed in a blower duct 1 arranged in an air conditioner for a vehicle, and the motor 3 is connected to the downstream side of the fan 2. A register device 4 is disposed to control the drive of the fan duct 1, and is cooled by the wind inside the air duct 1.

The register device 4 changes the current value supplied to the motor 3 to change the amount of air blown out from the air duct into four levels: low (weak), middle low (medium low), middle high (medium high), and high (high). It is something that makes you

This register device 4, as shown in FIG.
It is composed of a register main body 5 and a case 6 that houses the register main body 5 and protects it from the outside.

The register body 5 includes an air-cooled heat dissipation block 8.
, a resistor circuit board 9, a heat dissipation block support 22, and a connection terminal support plate 12 are laminated in this order.

The heat dissipation block 8 includes a plate-shaped substrate 13 and a plurality of cooling fins 7a, 7 integrally formed above the substrate 13.
It is composed of b. The cooling fins 7a extend vertically from the substrate 13, and the cooling fins 7b extend outward from the middle of the outer cooling fins 7a in a direction horizontal to the substrate 13.

A pair of spacers 14a and 14b are formed protruding from the cooling fin 7b side in the horizontal direction on the board 13, and as shown in FIG.
A gap 15 is formed between the case 6 and the case 6 when the case 6 is stored in the case 6.

The circuit board 9 of the resistor is arranged in a meandering manner through the continuous resistor 9a, both sides of which are covered with an insulating paper 16, and are in contact with the heat dissipation block 8 through the insulating paper 16. The resistor 9a is formed by etching on a copper-nickel or iron-chromium alloy substrate, and has a circuit shape that is relatively difficult to deform. Therefore, positioning during assembly is easy, and bending of the circuit during handling can be prevented. The insulating paper 16 is made of polyimide and is bonded with an adhesive. Resistor terminals 17a to 17e are drawn out from the resistor circuit 9 and are erected on the side surface of the substrate 13.

The resistance terminals 17a to 17e are arranged three on one side of the resistor circuit 9 and two on the other side.
The terminal 17b located in the center of the figure is a common resistance terminal through which current always passes, 17a is a resistance terminal for high output, 17c is a resistance terminal for low output, and 17d
17e is a resistor terminal for middle low output, and 17e is a resistor terminal for middle high output.

The support body 22 of the heat dissipation block is made of metal and has a substantially table-like shape, and a resistor circuit board 9 is placed on the top surface of the support body 22, and is held in such a manner as to be pressed against the heat dissipation block. On both sides thereof, legs 23a, 23b bent downward,
23c and 23d are formed. Each leg 23a
23d to 23d are formed to a predetermined length, and the third
As shown in the figure, the horizontal fins 7b have dimensions that support the case 6 by forming a gap 24 therebetween when assembled.

The lower end portion 25 of each foot portion 23a to 23d is formed in a bifurcated shape, and the connecting terminal support 1 described below
One of the two branches is inserted into the hole 21 formed in 2.
Further, as shown in FIG. 6, the bifurcated lower end portion 25 is inserted into the engagement hole 6a formed in the main body 31 of the case 6, and then swaged so as to spread out from each other and fixed to the main body 31 of the case 6. ing. Furthermore,
As shown in FIG. 6, the case 6 may have a structure in which a storage part 34 for storing the lower end part 25 is formed as described later, and the resin material 26 is filled and fixed therein.

Furthermore, as shown in FIGS. 7 to 9, a notch 27 may be formed in advance at the bent portion of the lower end of each leg. In this case, as shown in FIG. 8, it can be easily crimped when folded, and when the crimped part is returned to its original position and the case 6 is removed, it will break as shown in FIG. 9. It is becoming. Therefore, once the support body 22 of the heat dissipation block is pulled out from the case 6, it cannot be reassembled again, and if it is modified, it cannot be reassembled.

The heat radiation block support 22, the resistor circuit 9, and the heat radiation block 8 are connected to each other by a screw 28 screwed into the bottom surface of the heat radiation block support 22.
They are integrated at a and 28b. screw 28a,
Since 28b is attached from the inside in this way, it is not exposed to the outside and cannot be removed after assembly.

Five connection terminals 29a to 29e are erected approximately in the center of the connection terminal support plate 12, and the tips of these terminals face the aforementioned resistance terminals 17a to 17e on the side surface of the heat dissipation block 8. The temperature fuse 30 extends to the position and is adapted to be welded by a temperature fuse 30.

Case 6 includes case body 31 and temperature fuse 30
The case body 31 is integrally formed with a pair of walls 32a and 32b that stand upright from the case body 31 so as to protect the case body 31, and the case body 31 has a hole 31a in the center thereof through which the connection terminals 29a to 29e pass. is formed. When assembled, as shown in FIGS. 2 and 3, a space 33 is formed between the support 22 of the heat dissipation block and the case body 31, so that air can flow therethrough.

The case body 31 has the foot portion 23 as described above.
Storage section 34 that stores the lower end portions 25 of a to 23d
is formed, and the support body 22 of the heat dissipation block is secured to the case body 31 by caulking.

According to the configuration of the first embodiment described above, in the register device 4 after assembly, the portion of the temperature fuse 30 disposed on the side surface of the board 13 is housed inside the walls 32a and 32b of the case 6, and The horizontal fins 7b of the heat radiation block 8 prevent it from being touched from the outside.

Furthermore, the heat radiation block 8, the resistor circuit 9, and the support body 22 of the heat radiation block are screwed together from the inside by screws 28a,
28b, so that the screws are not exposed to the outside. Therefore, the device cannot be easily disassembled after assembly.

Since the horizontal fins 7b of the heat dissipation block 8 are configured to cover the temperature fuse 30 after it is housed in the case 6, the temperature fuse portion can be reliably shielded from the outside without providing a separate member.

As shown in FIG. 3, the case walls 32a, 3
By forming the gaps 15 and 24 between the fins 2b and the fins 7b, it is possible to improve ventilation and improve the cooling efficiency of the temperature fuse 30.

Further, since a space 33 is formed below the heat radiation block 8 to improve ventilation, it is possible to prevent heat accumulation in that part. In addition, spacer 14
a and 14b also serve to provide a gap so that the fuse part does not come into contact with the heat dissipation block.

Next, a second embodiment of the present invention will be described with reference to FIG. 11 and FIG. The same reference numerals are given to the parts, and detailed explanation thereof will be omitted.

As shown in FIG. 11, in this second embodiment, the case 6 is formed with walls 36 covering all sides, and a pair of walls facing each other have internal members 37a,
37b is provided to support the heat radiation block 8. On the lower surface of the heat dissipation block 8, a resistor circuit 9 whose both sides are covered with insulating paper and a mounting plate 42 are laminated as in the first embodiment, and screws 28 are screwed into the mounting plate 42 from the lower surface.
They are integrated at a and 28b. Then, in the heat dissipation block 8, the horizontal fins 7b are inserted into the screw holes 39 of the internal member 37a using screws 38a and 38b.
It is designed to be stopped by screwing into it. Further, each internal member 37a, 37b is formed with an engagement hole 40 in front and rear positions thereof, into which a locking piece 44 to be described later is engaged.

Resistance terminals 17a to 17e of a resistor circuit 9 are protruded from the front and rear of the substrate 13 of the heat dissipation block 8, and the connection terminals 2 are connected to the temperature fuses 30 here.
9a to 29e are connected.

Two covers 43a and 43b are provided so as to engage with each other at the front and rear of the heat radiation block 8.
A pair of engagement pieces 44 that engage with the above-mentioned engagement holes 40 are provided in a protruding manner on each of them, so that the engagement pieces 44 cannot be removed from the outside after being engaged with the internal member.

According to this second embodiment, the covers 43a, 4
3b can be easily fixed with one touch by simply pressing it against the case 6 side. In this case, since the locking piece 44 is located inside the case, this engagement cannot be removed from the outside after assembly, and touching the temperature fuse 30 can be reliably prevented.

FIG. 13 shows a third embodiment. According to this third embodiment, the wall portions 32a and 32b are configured to be removable from the case body 31, and the wall portion 3
A pair of engaging claws 32c, 3 are provided at the lower ends of 2a, 32b.
2d is provided in a protruding manner, and is adapted to be engaged with engagement holes 31c and 31d formed in the case body 31.

Furthermore, unlike the first embodiment, the third embodiment does not use the support plate 12 for the connection terminals, and the connection terminals 29a to 29d are configured to stand directly on the case body 31.

FIG. 14 shows a fourth embodiment. According to the fourth embodiment, unlike the first embodiment, a support for the heat dissipation block is not used, and the circuit board 9 of the resistor is held between the insulating paper 16 and attached to the heat dissipation block with adhesive or screws. It is configured to be attached to.

In this case, a pair of support columns 50a and 50b extending parallel to the connection terminals 29a to 29e are further provided on the support plate 12 of the connection terminal, and the heat dissipation block is spaced a predetermined distance from the case board 31 during assembly. I'm starting to support it.

Furthermore, locking pieces 51 are provided upwardly on the edges of the walls 32a and 32b of the case 6, and are engaged with engagement holes 54 formed in the horizontal cooling fins 7b during assembly. and support columns 50a, 50b
The case 6 and the heat dissipation block 8 are assembled to each other against this. With this configuration, the support for the heat dissipation block can be omitted and the number of parts can be reduced.

A fifth embodiment is shown in FIGS. 15 and 16.
According to this fifth embodiment, the wall portions 32a, 32b
is formed separately from the case body 31, and has a pair of engagement protrusions 32c, 32d protruding from its lower end, and engages holes 31c, 31 formed in the case body 31.
d.

In addition, cover parts 55a and 55b are formed on the upper part of the wall parts 32a and 32b, and as shown in FIG. Fix it.

In this case, the support plate 12 of the connection terminal is not limited to being configured separately from the case body 31, but may be configured integrally with the case body 31.

(Effects of the invention) Since the device according to claim 1 has a structure in which the temperature fuse portion is housed in a case and is not exposed to the outside, the temperature fuse portion cannot be easily tampered with.

The device according to the second aspect of the present invention has a caulking mechanism, so that the leg portion that integrates the register body and the case can be broken by prying the device apart, making it impossible to reuse the device.

In the device according to the third aspect, since the portion surrounded by the support body serves as a ventilation path, it is possible to improve ventilation on the lower surface of the heat dissipation block and prevent heat accumulation in the resistance circuit.

The device according to the fourth aspect has a structure in which the temperature fuse part housed in the case is covered with a separately constructed cover so that it is not exposed to the outside, thereby facilitating assembly.

The device according to claim 5 has a configuration in which the wall portion covering the temperature fuse is attached to a heat radiation block or a case, making assembly easy.

In the device according to claim 6, the temperature fuse portion is housed in the case and is not exposed to the outside, so that the temperature fuse portion cannot be easily tampered with.

The device according to the seventh aspect can be easily assembled by making the wall portion covering the temperature fuse separate from the case and attaching the wall portion to the case.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a register device according to a first embodiment of the invention, Fig. 2 is a perspective view of the register device, Fig. 3 is a front view of the register device, and Fig. 4 is a cross section of the register device. 5 is a longitudinal sectional view of the register device, FIG. 6 is a sectional view showing the caulking part, and FIGS. 7 to 9 are sectional views showing the action of the caulking part,
FIG. 10 is a cross-sectional view of an air conditioning duct showing how the register device is installed, FIG. 11 is a perspective view of the register device according to the second embodiment, and FIG. 12 is a cross-sectional view of the register device according to the second embodiment. , Figure 13 is the third
14 is a perspective view of the register device according to the fourth embodiment, FIG. 15 is a perspective view of the register device according to the fifth embodiment, and FIG. 16 is a perspective view of the register device according to the fifth embodiment. FIG. 5 is a cross-sectional view of a register device according to a fifth embodiment. 6... Case, 7... Fin, 8... Heat dissipation block, 9... Resistor circuit board, 17a, 17b,
17c, 17d, 17e...resistance terminal, 30...
Temperature fuse, 29a, 29b, 29c, 29
d, 29e... Connection terminal.

Claims (1)

[Claims for Utility Model Registration] 1. A heat radiation block 8 having cooling fins, and a support body 22 that supports this heat radiation block 8.
, a resistor circuit board 9 interposed between the support 22 and the heat radiation block 8, and a resistor terminal 17a led out from the circuit board 9.
~17e and connection terminal 2 attached to case 6 side
Temperature fuse 30 connecting 9a to 29d
and a wall portion 32 provided in the case 6 that covers the portion connected by this temperature fuse 30.
A register device for controlling a blower, comprising: a and 32b. 2 The support body 22 has foot parts 23a to 23d that are caulked to the case 6, and the foot parts 23a
2. The register device for blower control according to claim 1, wherein a notch 27 is formed in the middle of each of the registers 23d to 23d. 3. The register device for blower control according to claim 1, wherein the portion 33 surrounded by the support body 22 is a ventilation path. 4 A heat dissipation block 8 having cooling fins, a case 6 that supports this heat dissipation block 8, a resistor circuit board 9 attached to the heat dissipation block 8, and a resistance terminal 17a led out from this circuit board 9.
Temperature fuse 3 connecting 17e to connection terminals 29a to 29d mounted on the case 6 side
0, and the temperature fuse 30 in cooperation with the case 6.
A register device for controlling a blower, comprising covers 43a and 43b attached to the case 6 to cover parts connected at the casing 6. 5 A heat radiation block 8 having cooling fins, and a support body 22 that supports this heat radiation block 8
, a resistor circuit board 9 interposed between the support 22 and the heat radiation block 8, and a resistor terminal 17a led out from the circuit board 9.
Temperature fuse 3 connecting 17e to connection terminals 29a to 29d mounted on the case 6 side
0, and separate wall portions 32a and 32b attached to the heat radiation block 8 or the case 6, covering the portion connected by the temperature fuse 30.
A register device for controlling a blower, comprising: 6 A heat dissipation block 8 having cooling fins, a resistor circuit board 9 attached to this heat dissipation block 8, and a resistance terminal 17a led out from this circuit board 9.
Temperature fuse 3 connecting 17e to connection terminals 29a to 29d mounted on the case 6 side
0, and wall portions 32a and 32b erected on the case 6 to hold the heat radiation block 8 and cover the portion connected to the temperature fuse 30 in cooperation with the heat radiation block 8. A register device for controlling the blower. 7 A heat dissipation block 8 having cooling fins and supported by support columns 50a and 50b erected from the case 6
, a resistor circuit board 9 attached to this heat dissipation block 8, and a resistor terminal 17a led out from this circuit board 9.
Temperature fuse 3 connecting 17e to connection terminals 29a to 29d mounted on the case 6 side
0, and separate wall portions 32a and 32b attached to the case 6 that cover the portion connected by the temperature fuse 30.