Temperature control switch circuit

A temperature control switch, control electrode technology, applied in the direction of temperature control, non-electric variable control, control/regulation system, etc., can solve the problems of slow response speed, complex structure, low recovery force, etc., to achieve long life, simple circuit structure , the effect of strong recovery

Inactive Publication Date: 2018-01-12
SHENZHEN ZHONGFUNENG ELECTRIC EQUIPMENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical solution provided by the embodiment of the present invention utilizes the voltage-temperature characteristics of the semiconductor switching element, and uses the semiconductor switching element as the temperature sensing terminal and the circuit control terminal at the same time, which solves the problem of complex mechanical structure, slow response speed and low restoring force of the conventional temperature control switch And the problem of short life; realize the temperature control switch circuit with simple circuit structure, fast and sensitive response, strong recovery and long life

Method used

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Embodiment 1

[0015] figure 1 It is a structural block diagram of a temperature control switch circuit provided by Embodiment 1 of the present invention. Such as figure 1 As shown, the temperature control switch circuit includes a voltage control module 110 and a semiconductor switch 120, the semiconductor switch 120 includes a control electrode Ctrl, a first electrode E1 and a second electrode E2, between the control electrode Ctrl of the semiconductor switch 120 and the first electrode E1 When different preset voltages are applied, the first electrode E1 and the second electrode E2 of the semiconductor switch are turned on when the ambient temperature reaches the threshold temperature, and each preset voltage corresponds to a threshold temperature;

[0016] The voltage control module 110 is electrically connected to the control electrode Ctrl and the first electrode E1 of the semiconductor switch 120, respectively, and is used to apply a first preset voltage between the control electrode...

Embodiment 2

[0026] Figure 4 It is a structural block diagram of another temperature control switch circuit provided by Embodiment 2 of the present invention, such as Figure 4 As shown, on the basis of Embodiment 1, the temperature control switch circuit also includes a temperature control module 130, and the temperature control module 130 stores the correspondence between a plurality of preset voltages and threshold temperatures, such as figure 2 As shown, and the control signal output terminal Out is electrically connected to the voltage control module 110, and is used to receive the first threshold temperature T0 input by the user, obtain the corresponding first preset voltage V0 according to the first threshold temperature T0, and control the voltage control module 110 applies a first preset voltage V0 between the control electrode Ctrl and the first electrode E1 of the semiconductor switch 120 .

[0027] In the technical solution provided by the embodiment of the present invention...

Embodiment 3

[0029] Figure 5 It is a circuit element diagram of a temperature control switch circuit provided in Embodiment 3 of the present invention, as shown in Figure 5 As shown, on the basis of the above embodiments, the voltage control module 110 of the temperature control switch circuit provided in this embodiment includes a fixed value resistor R0 and a variable resistor RX;

[0030] The first end R01 of the fixed-value resistor R0 is electrically connected to the first electrode E1 of the semiconductor switch 120 and grounded, and the second end R02 of the fixed-value resistor R0 is electrically connected to the control electrode Ctrl of the semiconductor switch;

[0031] The first terminal RX1 of the variable resistor RX is electrically connected to the control electrode of the semiconductor switch 120 and the second terminal R02 of the fixed value resistor R0, and the second terminal RX2 of the variable resistor RX is electrically connected to the regulated power supply Vcc. ...

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Abstract

The invention discloses a temperature control switch circuit. The temperature control switch circuit comprises a voltage control module and a semiconductor switch, the semiconductor switch comprises acontrol electrode, a first electrode and a second electrode, when different preset voltage is exerted between the control electrode and the first electrode of the semiconductor switch, the first electrode and the second electrode of the semiconductor switch are connected when environmental temperature reaches threshold value temperature, and each preset voltage corresponds to the threshold valuetemperature; the voltage control module is electrically connected with the control electrode and the first electrode of the semiconductor switch and used for exerting the first preset voltage betweenthe control electrode and the first electrode of the semiconductor switch so that the first electrode and the second electrode of the semiconductor switch can be connected when the environmental temperature reaches the corresponding first threshold value temperature. By the utilization of temperature features of a semiconductor, the temperature control switch circuit is low power consumption, rapid and sensitive in response, high in automatic restoration and long in service life, and a temperature control value can be set.

Description

technical field [0001] The embodiments of the present invention relate to the field of fire safety and automatic control, and in particular to a temperature control switch circuit. Background technique [0002] Temperature control switches are often used in refrigerators, air conditioners, or fire safety alarms as temperature control or overheating protection components. The temperature control switches currently on the market mainly include resistive temperature control switches and temperature control switches based on the principle of thermal expansion and contraction. [0003] The resistive temperature control switch is made according to the principle of Wheatstone bridge. When the impedance of the thermistor changes with the rise or fall of the surrounding temperature, the balance of the Wheatstone bridge is destroyed, and the output of the bridge has current output. Therefore, in the resistance temperature switch, the current output value changes gradually, and the r...

Claims

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Application Information

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IPC IPC(8): G05D23/24
Inventor 丁柏平黄阳彪蔡增智庄瑞霞
Owner SHENZHEN ZHONGFUNENG ELECTRIC EQUIPMENG CO LTD
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