JPH0125690Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a structure for preventing overheating of a register for controlling a blower in an air conditioner.

(Prior art and its problems) Conventionally, as a method for adjusting the capacity of an air conditioner, a resistor device (hereinafter simply referred to as "register") for controlling a blower, which is composed of resistors with various resistance values, is used to control the motor that drives the blower. (referred to as "device")
Therefore, a method is known in which the number of revolutions of the blower is changed by selecting the resistance value of the resistor to adjust the amount of air blown. In a resistor device used for controlling a blower of such an air conditioner, a coiled nichrome wire is generally used as a resistor. This resistor device is disposed in a duct of an air conditioner, and the nichrome wire serving as a resistor is air-cooled by the blower. Therefore, if the air supply stops or if an overcurrent flows through the nichrome wire, which serves as a resistor, the nichrome wire will overheat, potentially igniting the resin-based materials often used in air conditioners and causing a fire. .
Therefore, a fuse is provided between the nichrome wire as a resistor and the power source, and when a current exceeding a predetermined current value flows through the fuse, it melts to prevent the above-mentioned fire from occurring. However, in the register device as described above, a fuse is required separately, and installation work for the fuse is also required separately, which takes up space and requires manpower to install. Furthermore, since the register device after the fuse has blown can be easily regenerated by using wires, etc., it is no longer possible to prevent fires and the like due to the blown fuse in the event of an abnormality as described above. Furthermore, the nichrome wire used as a resistor becomes quite hot in the event of an abnormality, and if the nichrome wire is left exposed and the fuse is melted but the power is not disconnected, there is a risk of a fire.

(Purpose of the invention) The present invention was made in view of the above circumstances, and is an air blower that can prevent a fire from occurring due to the high temperature of the resistor that constitutes the resistor without using a fuse. The purpose is to provide a register for control.

(Means for Solving the Problems) In order to solve the above problems, in the present invention, a resistor is constructed by incorporating a resistor into a resistor holding member, and a resistor is placed in a predetermined position at a predetermined position of the resistor of the resistor. It is constructed by providing a fusing part that melts when a current exceeding the current value flows.

(Function) According to the above configuration, since the resistor serving as the heating element is incorporated into the resistor holding member and the fusing part is provided at a predetermined position of the resistor, a current exceeding a predetermined current value flows through the resistor. In this case, the fusing portion is fused due to heat generated by the resistor.

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is a perspective view of a register device for controlling a blower equipped with a register according to an embodiment of the present invention;
FIG. 2 is a plan view of the register. In the figure, reference numeral 1 indicates a register device for controlling a blower, and the resistor device 1 includes a resistor 2 mounted on a ceramic substrate (resistor holding member) 3, a resistor 4 formed by etching, and a resistor 4 on both sides of the resistor 4. A heat dissipating member with fins (heat dissipating member) 5 and a heat dissipating member 6 disposed, a mounting board 8 to which these are attached via a spacer 7, and a resistor of the resistor 4 integrally molded on the mounting board 8. 2, and a connector housing 10 housing a connecting terminal 9 connected to the connector housing 10.

The resistor 4 is formed by mounting a resistor having a predetermined thickness on a rectangular ceramic substrate 3, and etching the mounted resistor so as to obtain a predetermined resistance value to form the resistor 2. Connecting terminals 9 are connected to one end 2a, substantially central portion 2b, and other end 2c of the resistor 2, each having a predetermined resistance value. A fusing portion 2d having a narrow width is provided at the other end 2c of the resistor 2, and is configured to be fused when a current equal to or higher than a predetermined current value flows through the fusing portion 2d. The front surface of the resistor 2 of the ceramic substrate 3 is closely covered with an insulator 11 such as cement, so that the connecting terminal 9 of the resistor 2 is not short-circuited.

The heat dissipating member 5 with fins has a large number of fins 5b erected on a plate 5a having a predetermined thickness, which is formed to closely cover the upper surface of the register 4 in FIG. 1. Become. The heat dissipation member 6 is formed of a plate having substantially the same thickness as the plate 5a of the heat dissipation member 5 with fins and the same rectangular shape as the ceramic substrate 3, and is attached to closely cover the lower surface of the ceramic substrate 3. There is.

The mounting board 8 is made of a material such as flame-retardant resin or ceramic and has a substantially elliptical shape, and a contactor housing 10 is integrally formed on the lower surface 8a of the mounting board 8 in the figure. Bolt insertion holes 8b, 8b are bored at both ends of the mounting board 8 for mounting the register device 1 into a duct of an air conditioner (not shown).

The heat radiating member 5 with fins and the heat radiating member 6 disposed on both sides of the register 4 are attached to a mounting board 8 via a cylindrical spacer 7 with bolts 12 and nuts 13.
It is attached by screwing.

As shown in FIG. 3, the connection terminal 9 is formed into a substantially Z-shape, and its substantially center portion is fixed to the mounting board 8, and the end portion 9a is inserted into the terminal insertion hole (not shown) of the mounting board 8. 1) and protrudes into the connector housing 10. This end portion 9a together with the connector housing 10 forms a connector insertion portion 14. A convex portion 10a is formed on one side of the connector housing 10, and this convex portion 10a prevents the inserting portion 14 of the connector from being inserted in the wrong direction.

(Effects of the invention) As detailed above, according to the invention, a resistor is constructed by incorporating a resistor into a resistor holding member, and a resistor is placed at a predetermined position of the resistor in the resistor.
It is constructed by providing a fusing part that melts when a current of a predetermined current value or more flows. Therefore, this resistor is a self-fusing type, and if a current exceeding a predetermined current value flows through the resistor, the fusing part of the resistor will melt, cutting off the power supply and causing the resistor to become hot. It prevents Therefore, a separate fuse or the like is not required, so no space is required and there is no installation work required. Furthermore, since it is a self-fusing type resistor, it cannot be easily regenerated, so it has the advantage of being highly safe.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a register device for a blower equipped with a register according to an embodiment of the present invention, Figure 2 is a plan view of the register, and Figure 3 is Figure 1A.
It is an arrow view. 2...Resistor, 2d...Fusing part, 3...Resistor holding member, 4...Resistor.

Claims (1)

[Scope of utility model registration request] A blower control characterized in that a resistor is constructed by incorporating a resistor into a resistor holding member, and a fusing part is provided at a predetermined position of the resistor of the resistor, which fuses when a current of a predetermined current value or more flows. register for.