Digital temperature switch

Abstract

A digital temperature switch comprises a main body shell, the top end of the main body shell is rotatably provided with a rotary gauge outfit, the main body shell and a process connecting piece can also rotate, operation in a narrow space is facilitated, the rotary gauge outfit is fixedly provided with an operation panel, a circuit board is fixedly installed in an inner cavity of the main body shell, the side wall of the main body shell is provided with an aviation plug, and the aviation plug is connected with the process connecting piece. The circuit board is connected with the aviation plug and the operation panel through wires. According to the utility model, two programs of relay switching value and analog quantity output are merged in the circuit board, the switching value controls the product to carry out switching action when the measured temperature exceeds or is lower than a set value, the analog quantity converts a temperature signal into an electric signal for continuous output, COM ends of the two switching values are completely independently separated and are respectively connected with S1 and S2, and the COM ends of the two switching values are respectively connected with S1 and S2. The mode of connecting S1 and S2 through a com end in the past is replaced, and the situation that short circuit of an output line is not allowed in field use is solved.

Description

Technical Field

[0001] The utility model relates to the field of temperature switches, in particular to a digital temperature switch. Background Art

[0002] A temperature controller is an accurate temperature detection and control device that can perform quantitative control of temperature. The temperature controller generally uses a temperature sensor or a temperature switch as the temperature detection element. Its principle is as follows: The sensor or switch signal is designed into the corresponding circuit. The action of the sensor or switch changes with the temperature, and the corresponding voltage, current, or switch state changes. Then, the microcontroller detects, quantifies, and displays the changed voltage, current, and switch signal, and performs corresponding control.

[0003] At present, there is only one com terminal in the temperature switch circuit to connect S1 and S2. In some special occasions such as fire control, circuit short - circuit alarm will occur, and this situation cannot be applied to the above - mentioned corresponding occasions. In the past, two products were installed separately for measurement and control, which greatly increased the use cost. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a digital temperature switch to solve the problems raised in the above background art.

[0005] The utility model solves its technical problems by adopting the following technical solutions:

[0006] A digital temperature switch includes a main body shell. A rotary dial head is rotatably arranged at the top of the main body shell. The rotary dial head can be rotated, which is convenient for operation in a narrow space. An operation panel is fixedly arranged on the rotary dial head. A circuit board is fixedly installed in the inner cavity of the main body shell. An aviation plug is arranged on the side wall of the main body shell. The circuit board is respectively connected to the aviation plug and the operation panel through wires. A protection tube is arranged at the bottom of the main body shell through a process connector. A thermal resistor is arranged on the bottom wall of the inner cavity of the protection tube. The thermal resistor is connected to the circuit board through a wire.

[0007] Preferably, the operation panel includes an alarm indicator light, a digital display screen, and setting buttons.

[0008] Preferably, the main body shell and the process connector can be rotated.

[0009] Preferably, a certain amount of thermal conductive silicone grease is injected between the thermal resistor and the inner cavity wall of the protection tube.

[0010] The advantages and positive effects of the utility model are:

[0011] 1. The utility model combines two programs of relay digital quantity and analog quantity output in the circuit board. The digital quantity controls the product to perform switching actions when the measured temperature exceeds or is lower than the set value, while the analog quantity converts the temperature signal into an electrical signal for continuous output. Among them, the COM terminals of the two digital quantities are completely separated and connected to S1 and S2 respectively, replacing the previous connection of one COM terminal to S1 and S2. This method solves the situation where short-circuiting of output lines is not allowed in on-site use. Brief Description of the Drawings

[0012] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0013] Figure 1 It is a front view structural schematic diagram of the whole digital temperature switch of the present utility model;

[0014] Figure 2 For the present utility model Figure 1 Partial cross-sectional view;

[0015] Figure 3 For the present utility model Figure 2 Enlarged structural schematic diagram at position A;

[0016] Figure 4 It is the circuit diagram in the circuit board of the present utility model.

[0017] The marks in the drawings are described separately as follows: 10, main body shell; 11, rotary meter head; 12, operation board; 13, aviation plug; 14, circuit board; 15, process connector; 16, thread; 17, thermal resistor; 18, protection tube. Specific Embodiments

[0018] Now, the present utility model will be further described in detail in conjunction with the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0019] The following will be combined with Figures 1-4 to describe the present utility model in detail. Among them, for the convenience of narration, the orientation described below is defined as follows: the up-down, left-right, front-back directions mentioned below are consistent with the front-back, left-right, up-down directions of the Figure 1 viewing direction, Figure 1 is the front view of the device of the present utility model, Figure 1 and the direction shown is consistent with the front-back, left-right, up-down directions of the front view direction of the device of the present utility model.

[0020] The following will further describe the embodiments of the present utility model in conjunction with the drawings:

[0021] Please refer to Figures 1-4, an embodiment provided by the present utility model: a digital temperature switch, including a main body case 10, a rotary meter head 11 is rotatably provided at the top of the main body case 10, and the main body case 10 and the process connector 15 can also be rotated to facilitate operation in a narrow space. An operation panel 12 is fixedly provided on the rotary meter head 11. A circuit board 14 is fixedly installed in the inner cavity of the main body case 10. An aviation plug 13 is provided on the side wall of the main body case 10. The circuit board 14 is respectively connected to the aviation plug 13 and the operation panel 12 through wires. A thread 16 is provided at the bottom of the main body case 10 through the process connector 15. A protection tube 18 is provided below the thread 16. A thermal resistor 17 is provided on the bottom wall of the inner cavity of the protection tube 18. The thermal resistor 17 is connected to the circuit board 14 through a wire.

[0022] In addition, in one embodiment, the operation panel 12 includes an alarm indicator light, a digital display screen, and function keys.

[0023] In addition, in one embodiment, the main body case 10 and the process connector 15 can be rotated.

[0024] In addition, in one embodiment, a certain amount of thermal conductive silicone grease is injected between the thermal resistor 17 and the inner cavity wall of the protection tube 18.

[0025] During specific implementation; this product is connected to the device to be detected through the thread 16. The temperature signal of the medium is detected through the thermal resistor 17 and the information is transmitted to the circuit board. The temperature of the medium can be observed through the digital display screen of the operation panel 12. At the same time, function settings and alarm prompts can be carried out;

[0026] In this product, the circuit board 14 incorporates two programs of relay switch quantity and analog quantity output. The switch quantity controls the switch action of this product when the measured temperature exceeds or is lower than the set value, and the analog quantity converts the temperature signal into an electrical signal and continuously outputs. Among them, the COM terminals of the two switch quantities are completely independently separated and connected to S1 and S2 respectively, replacing the previous connection of one com terminal to S1 and S2. This method solves the situation where short-circuiting of output lines is not allowed in on-site use.

[0027] It should be emphasized that the embodiments described in the present utility model are illustrative rather than restrictive. Therefore, the present utility model is not limited to the embodiments described in the specific implementation manners. Any other implementation manners obtained by those skilled in the art based on the technical solutions of the present utility model also belong to the scope of protection of the present utility model.

Claims

1. A digital temperature switch, comprising a main housing (10), characterized in that: The top of the main body shell (10) is rotatably provided with a rotating head (11), and the main body shell (10) and the process connection piece (15) can also rotate. An operation panel (12) is fixedly provided on the rotating head (11), and a circuit board (14) is fixedly installed in the inner cavity of the main body shell (10). An aviation plug (13) is provided on the side wall of the main body shell (10), and the circuit board (14) is connected to the aviation plug (13) and the operation panel (12) respectively through wires. The bottom of the main body shell (10) is provided with a thread (16) through the process connection piece (15), and a protective tube (18) is provided below the thread (16). A thermal resistor (17) is provided on the bottom wall of the inner cavity of the protective tube (18), and the thermal resistor (17) is connected to the circuit board (14) through a wire.

2. A digital temperature switch according to claim 1, characterized in that: The operating panel (12) comprises an alarm prompt light, a digital display screen, and setting buttons.

3. A digital temperature switch according to claim 1, characterized in that: The main body housing (10) and the process connection piece (15) are rotatable.

4. A digital temperature switch according to claim 1, characterized in that: A certain amount of thermal conductive silicone grease is injected between the thermal resistor (17) and the inner wall of the protective tube (18).

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