JPH0830336A - Abnormal temperature controller for electronic equipment - Google Patents

Abstract

PURPOSE:To provide a device, with which the number of times to use a temperature fuse can be minimized and the supply of power to all the heater lines can be immediately stopped just after the fusion of the temperature fuse is generated, concerning the abnormal temperature control of electronic equipment using the temperature fuse. CONSTITUTION:Concerning the abnormal temperature controller for electronic equipment, a temperature fuse 3 is inserted in any line different from a heater line 2 and arranged at a certain position so as to detect the heating temperature due to a heater 1 and when the temperature fuse 3 is fused at any abnormal temperature, a relay circuit 4 is turned on and turned off by operating a braker 5 and all the heater lines 2 are turned off so that the supply of a power source 9 to the heater 1 can be stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormal temperature control device for electronic equipment, and more particularly to a device for detecting an abnormal temperature using a temperature fuse and controlling electronic equipment.

[0002]

2. Description of the Related Art For example, in order to obtain data by testing and measuring the temperature characteristics of a semiconductor device to be measured using a semiconductor test apparatus and its handler, a temperature constant temperature bath of the test apparatus is used. Then do. As shown in Fig. 3, normally, the electric heater is controlled by a control circuit such as a semiconductor relay such as SSR (Solid State Relay), but if the temperature rises abnormally for some reason, the electric heater A method is adopted in which a thermal fuse inserted in series in a heater line is blown and the supply of power is stopped.

According to this conventional method, only one temperature fuse is required for a heater using a single-phase power supply, but two heaters are used for a heater line in one heater in a heater using a three-phase power supply. A thermal fuse is required. Also, in the case of each power source, if the number of heaters increases, the number of thermal fuses must also increase proportionally. Further, in the case of the three-phase power source, even if one of the temperature fuses is blown and the current in the heater line is cut off, the other heater lines are still operated.

[0004]

In the prior art, for example, the number of temperature fuses inserted in series in each heater line of the heater that constitutes the temperature-controlled bath increases in proportion to the required heater line. I will end up. Further, like the heater in the case of a three-phase power supply, even if the temperature fuse of one heater line is blown and the supply of power is stopped, the other heater lines are still operating. It was

Therefore, in the method of using the temperature fuse of the heater line in the temperature constant temperature bath of the electronic control device of the present invention, the number of temperature fuses used for the heater is reduced even in the case of a three-phase power supply. Further, another object of the present invention is to provide a method capable of stopping the power supply to all the heater lines when the thermal fuse is blown due to some abnormality.

[0006]

In order to achieve the above object, in the method of using the thermal fuse in the heater line in the thermostatic oven of the present invention, as shown in FIG.
The thermal fuse should not be directly inserted in series with each heater line, but should be placed at a position where the temperature from the heater can be sensed.
The temperature fuse is provided in a line different from the heater line, and passes through the exciting coil of the relay that controls the breaker. If an abnormal temperature is detected, the thermal fuse will melt,
The relay circuit turns on and voltage is applied to the breaker excitation coil. Then, the breaker worked and turned off, and by turning off all the heater lines, the power supply to the heaters was stopped.

[0007]

[Action]

(1) According to the present invention, as in the prior art, a temperature fuse is inserted in each heater line in series, and instead of directly controlling the heater line, an abnormal temperature is sensed and the temperature fuse is blown. A circuit for stopping the power supply to the heater line is provided separately from the heater line. As a result, it is possible to configure the thermal fuse in an extremely flexible manner in terms of usage and arrangement. (2) That is, regardless of the number of heaters or heater lines, one thermal fuse and one thermal fuse line may be configured, and this is also the case for the single-phase power source and the three-phase power source system. is there. (3) Furthermore, depending on the structure and size of the constant temperature chamber, and the number and arrangement of the heaters that accompany it, a method of using thermal fuses in series can be used, so there is no freedom in designing the structure. Significantly improved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a circuit configuration for explaining the principle and concept of an embodiment of the present invention. (1) Power is supplied to the heater 1 by the heater line 2 passing through the breaker 5, the SSR 8 and the like. Further, the exciting coil of the breaker 5 is incorporated in the circuit of the relay 4, and a current is supplied from the power source B · 7 via the contact of the relay 4 so as to be controlled. (2) Further, the thermal fuse 3 is incorporated in the line passing through the exciting coil of the relay 4, and the power source A6 is connected. That is, the temperature fuse 3 is connected to the heater line 2
It is configured on a separate line from.

Next, the operating principle of the circuit will be described. (3) The relay 4 is set to the normally closed state in which the contact is OFF when voltage is applied to the coil, so if the abnormal temperature is sensed and the thermal fuse is blown, the relay 4 Contact 4 turns on. (4) Then, a voltage is applied to the exciting coil of the breaker 5 by the power supply B · 7, and the contact of the breaker 5 is turned off. In this way, the power supply C for the heater line 2
By turning off 9 by the breaker 5 of the original, it became possible to turn off all the heater lines 2, that is, all the heaters 1. (5) Also, as shown in FIG. 2, there are N heaters 1
Even if the unit is configured, the thermal fuse 3 is 1
It is good with the individual. Furthermore, if there are several units, for example, four units, then only four thermal fuses 3 are required. In that case, the thermal fuse 3 is connected in series.

Up to now, the power sources A and 6 and the power sources B and 7 have been described as separate power sources for easy understanding, but the same power source may be used. In other words, the line of power supply A6 and power supply B
・ It is recommended to connect the 7th line in parallel and operate.

Further, the temperature constant temperature bath used in the semiconductor test apparatus has been described in detail as an example, but the present invention is not limited to this, and extends to an abnormal temperature control device for all electronic devices using a temperature fuse. It is a thing.

[0012]

Since the present invention is configured as described above, it has the following effects. (1) In the method of the present invention, the number of temperature fuses used can be reduced by not providing the temperature fuses directly in series in the heater line but by providing the circuit separately from the heater line. For example, in the three-phase power supply system, in the conventional technique, at least one heater has two temperature fuses.
I needed one. Therefore, if there were N heaters in one unit, 2 × N thermal fuses were used.
I only need one. (2) In the circuit of the thermal fuse of the present invention, if the thermal fuse, which is the limiter of the hardware that detects an abnormal temperature, is blown, the power supply to all the heater lines can be stopped by one operation. became.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram showing the concept of an embodiment of the present invention.

FIG. 2 is a block diagram showing a case of a plurality of heaters and a plurality of units in another embodiment of the present invention.

FIG. 3 is a circuit configuration diagram using a thermal fuse of a heater line of a conventional technique.

[Description of sign]

 1 Heater 2 Heater line 3 Thermal fuse 4 Relay 5 Breaker 6 Power supply A 7 Power supply B 8 SSR 9 Power supply C

Claims (2)

[Claims] 1. A heater (1) provided through a breaker (5) on a heater line (2) from a power source C (9) inside the electronic device, and a heater (1) provided on the line from a power source B (7). The relay (4) connected in series with the exciting coil of the breaker (5) and the exciting coil of the relay (4) connected in series on the line from the power supply A (6) to generate heat from the heater (1). An abnormal temperature control device for an electronic device, comprising: a temperature fuse (3) that fuses when an abnormal temperature is reached while sensing the temperature. 2. The power source A (6) and the power source B (7) are shared and are connected in parallel, and the power source A (6) or the power source B (7).
The abnormal temperature control device for an electronic device according to claim 1.