CN219265539U - NTC thermal time constant test equipment - Google Patents

Abstract

The utility model discloses NTC thermal time constant testing equipment which comprises a shell box body, wherein a control panel is arranged on the front surface of the shell box body in a penetrating mode, a first temperature controller, a second temperature controller and a timer are fixedly connected to the front surface of the control panel from left to right in sequence, heat conducting copper fins are arranged on the rear side of the control panel, bolt rods are arranged on the top and the bottom of the rear side of the heat conducting copper fins in a penetrating mode, and a thread sleeve is connected to the front side of the surface of the bolt rods in a threaded mode. According to the utility model, through the matched use of the shell box body, the control panel, the first temperature controller, the second temperature controller, the timer, the heat conducting copper fins, the bolt rod, the threaded sleeve, the exhaust pipe, the exhaust fan, the air inlet pipe, the semiconductor refrigerator and the heat exchange fins, the utility model has the advantages of high detection precision and good heat dissipation effect, and solves the problems that the error generated by the traditional test method is larger, the detection requirement cannot be met, and the heat dissipation performance of the detection equipment is poor.

Description

NTC thermal time constant test equipment

Technical Field

The utility model relates to the technical field of NTC detection equipment, in particular to NTC thermal time constant test equipment.

Background

NTC refers to a material with temperature rising resistance decreasing exponentially and negative temperature coefficient thermistor phenomenon, the national standard defines that NTC ' S ' thermal time constant ' is ' in a specified medium, when the environmental temperature changes suddenly, the thermistor responds 63.2% of the temperature difference between the beginning and the end of the change, the required time (unit is S) ', no professional equipment is used for testing in the market at present, and the universal ' thermal time constant ' testing method in the industry is as follows: the NTC is connected with resistance test equipment at room temperature, then the NTC is put into boiling water, a stopwatch is used for manually starting timing at the moment of putting into the boiling water, when the resistance test equipment displays a temperature resistance value corresponding to 63.2% of the difference value between the boiling water and the room temperature, the timing is manually stopped, the recorded result of the method has larger data errors due to different personal reaction speeds and test habits, the response time required by application scenes of certain NTCs is shortened to 1-2 seconds or even less than 1 second along with the continuous improvement of the NTC performance requirements of the market, the errors generated by the traditional test method reach unacceptable degree, the detection requirement cannot be met, the heat dissipation performance of the detection equipment is poor, and the high temperature can influence the test accuracy, so that the actual use requirements cannot be met.

Disclosure of Invention

The utility model aims to provide NTC thermal time constant test equipment, which has the advantages of high detection precision and good heat dissipation effect, and solves the problems that the error generated by the traditional test method is larger, the detection requirement cannot be met, and the heat dissipation performance of the detection equipment is poor.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a NTC thermal time constant test equipment, includes the shell box, the front of shell box runs through and is provided with control panel, control panel's front is from left to right fixedly connected with first temperature controller, second temperature controller and time-recorder in proper order, control panel's rear side is provided with heat conduction copper fin, the top and the bottom of heat conduction copper fin rear side all run through and are provided with the shank of bolt, the front side threaded connection on shank of bolt surface has the thread bush, the opposite one side of thread bush all with the inner wall fixed connection of shell box, the right side intercommunication of shell box has the exhaust pipe, fixedly connected with exhaust fan between the top and the bottom of exhaust pipe inner chamber, the left side intercommunication of shell box rear side has the air-supply line, the top of air-supply line runs through and is provided with semiconductor refrigerator, the bottom fixedly connected with heat transfer fin of semiconductor refrigerator.

Preferably, the rear side of the heat exchange fin is provided with an active carbon filter screen, and the top and the bottom of the active carbon filter screen are fixedly connected with the inner wall of the air inlet pipe.

Preferably, a spring is sleeved on the surface of the bolt rod, and the front end and the rear end of the spring are fixedly connected with the bolt rod and the heat conducting copper fins respectively.

Preferably, the front surface of the heat conduction copper fin is provided with heat conduction silica gel, and the front side of the heat conduction silica gel is contacted with the control panel.

Preferably, the front side at the top of the inner cavity of the outer shell box body is fixedly connected with a temperature and humidity sensor, and the front side at the right side of the control panel is fixedly connected with a power line.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, through the matched use of the shell box body, the control panel, the first temperature controller, the second temperature controller, the timer, the heat conducting copper fins, the bolt rod, the threaded sleeve, the exhaust pipe, the exhaust fan, the air inlet pipe, the semiconductor refrigerator and the heat exchange fins, the utility model has the advantages of high detection precision and good heat dissipation effect, and solves the problems that the error generated by the traditional test method is larger, the detection requirement cannot be met, and the heat dissipation performance of the detection equipment is poor.

2. According to the utility model, the active carbon filter screen is arranged, so that air entering the air inlet pipe can be filtered, dust is prevented from entering the shell box body, heat generated by the control panel can be conducted through the arrangement of the heat conducting silica gel, the heat radiating area is effectively increased, and the temperature inside the shell box body can be detected through the arrangement of the temperature and humidity sensor, so that the temperature and humidity sensor can be conveniently and timely adjusted.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a side cross-sectional view of the structure of the present utility model.

In the figure: 1. a housing case; 2. a control panel; 3. a first temperature controller; 4. a second temperature controller; 5. a timer; 6. a thermally conductive copper fin; 7. a bolt rod; 8. a thread sleeve; 9. an exhaust pipe; 10. an exhaust fan; 11. an air inlet pipe; 12. a semiconductor refrigerator; 13. a heat exchange fin; 14. an active carbon filter screen; 15. a spring; 16. thermally conductive silica gel; 17. a temperature and humidity sensor; 18. and a power supply line.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-2, an NTC thermal time constant testing apparatus includes an outer case 1, a control panel 2 is disposed on the front of the outer case 1, a first temperature controller 3, a second temperature controller 4 and a timer 5 are sequentially and fixedly connected to the front of the control panel 2 from left to right, a heat conducting copper fin 6 is disposed on the rear side of the control panel 2, bolt rods 7 are disposed on the top and bottom of the rear side of the heat conducting copper fin 6, a thread sleeve 8 is screwed on the front side of the surface of the bolt rods 7, one side of the thread sleeve 8 opposite to the front side is fixedly connected with the inner wall of the outer case 1, an exhaust pipe 9 is connected on the right side of the outer case 1, an exhaust fan 10 is fixedly connected between the top and the bottom of the inner cavity of the exhaust pipe 9, an air inlet pipe 11 is connected on the left side of the rear side of the outer case 1, a semiconductor refrigerator 12 is disposed on the top of the air inlet pipe 11, the bottom of the semiconductor refrigerator 12 is fixedly connected with a heat exchange fin 13, the rear side of the heat exchange fin 13 is provided with an active carbon filter screen 14, air entering the air inlet pipe 11 can be filtered by arranging the active carbon filter screen 14, dust is prevented from entering the outer shell box body 1, the top and the bottom of the active carbon filter screen 14 are fixedly connected with the inner wall of the air inlet pipe 11, the surface of a bolt rod 7 is sleeved with a spring 15, the front end and the rear end of the spring 15 are respectively fixedly connected with the bolt rod 7 and a heat conducting copper fin 6, the front side of the heat conducting copper fin 6 is provided with heat conducting silica gel 16, heat generated by the control panel 2 can be conducted by arranging the heat conducting silica gel 16, the heat radiating area is effectively increased, the front side of the heat conducting silica gel 16 is contacted with the control panel 2, the front side of the top of the inner cavity of the outer shell box body 1 is fixedly connected with a temperature and humidity sensor 17 by arranging the temperature and humidity sensor 17, can detect the inside temperature of shell box 1, conveniently in time adjust, the front side fixedly connected with power cord 18 on control panel 2 right side, through shell box 1, control panel 2, first temperature controller 3, second temperature controller 4, time-recorder 5, heat conduction copper fin 6, the bolt shank 7, thread bush 8, exhaust pipe 9, exhaust fan 10, air-supply line 11, semiconductor refrigerator 12 and heat exchange fin 13's cooperation is used, possess the advantage that the detection precision is high and the radiating effect is good, the error that traditional test method produced is great has been solved, can not satisfy the needs of detection, moreover the poor problem of detection equipment heat dispersion.

When the temperature sensor is used, after the first temperature controller 3 and the second temperature controller 4 are connected in parallel, an interface of a reserved butt joint temperature sensor is connected with a timer 5 in series and fixed in the shell box 1, a power supply line 18 is led out, when the temperature sensor is connected with the reserved interface in a butt joint mode, the two first temperature controllers 3 and the second temperature controller 4 can both display the current environment temperature, the first temperature controller 3 is set to be at an initial temperature which is higher than the environment temperature, the second temperature controller 4 is set to be 63.2% of a temperature difference value plus a current environment temperature base number for example, the current environment temperature is 30 ℃, the temperature is 100 ℃, at this time, the first temperature controller 3 is set to be at a temperature which is higher than 30 ℃ and can be 40, and the second temperature controller 4 is set to be at a temperature of 40+100-40 x 63.2% = 77.92 ℃; after setting, when the temperature sensor is placed in boiling water, when the temperature sensed by the temperature sensor exceeds 40 ℃ set by the first temperature controller 3, the first temperature controller 3 can give an electric signal to the timer 5, at this time, the timer 5 starts timing, when the temperature sensor senses 77.92 ℃ set by the second temperature controller 4, at this time, the second temperature controller 4 can give an electric signal to the timer 5 again, trigger to stop timing, at this time, the time reading of stopping is the thermal time constant of the temperature sensor, because the starting timing and the stopping timing are triggered by the temperature controller, the error of the second meter can be ignored compared with the manual triggering, the precision of the test is greatly improved, simultaneously, when the temperature and humidity sensor 17 detects that the temperature in the shell box 1 is greater than the set value, the signal is transmitted to the external controller, the external controller starts the exhaust fan 10 and the semiconductor refrigerator 12, the heat conducting copper fins 6 and the heat conducting silica gel 16 conduct the heat generated by the control panel 2, the heat exchanging fins 13 are increased, the heat exchanging fins 13 refrigerates the heat, the air in the shell box 1 is discharged from the shell box 1 through the air inlet pipe and the air inlet pipe 13, and then the heat exchanging heat is discharged into the shell 1 through the air inlet pipe and the air outlet pipe.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. An NTC thermal time constant testing device comprising a housing box (1), characterized in that: the utility model discloses a semiconductor refrigerator, including shell box (1), control panel (2), first temperature controller (3), second temperature controller (4) and time-recorder (5) of front follow left to right fixedly connected with in proper order, the rear side of control panel (2) is provided with heat conduction copper fin (6), the top and the bottom of heat conduction copper fin (6) rear side all run through and are provided with shank of bolt (7), the front side threaded connection on shank of bolt (7) surface has thread bush (8), the opposite one side of thread bush (8) all with the inner wall fixed connection of shell box (1), the right side intercommunication of shell box (1) has exhaust pipe (9), fixedly connected with exhaust fan (10) between the top and the bottom of exhaust pipe (9) inner chamber, the left side intercommunication of shell box (1) rear side has air-inlet tube (11), the top of air-inlet tube (11) runs through and is provided with semiconductor refrigerator (12), the bottom fixedly connected with heat transfer fin (13) of semiconductor refrigerator (12).

2. The NTC thermal time constant testing apparatus according to claim 1, characterized in that: the back side of heat transfer fin (13) is provided with active carbon filter screen (14), the top and the bottom of active carbon filter screen (14) are all with the inner wall fixed connection of air-supply line (11).

3. The NTC thermal time constant testing apparatus according to claim 1, characterized in that: the surface of the bolt rod (7) is sleeved with a spring (15), and the front end and the rear end of the spring (15) are fixedly connected with the bolt rod (7) and the heat conducting copper fins (6) respectively.

4. The NTC thermal time constant testing apparatus according to claim 1, characterized in that: the front of the heat conduction copper fin (6) is provided with heat conduction silica gel (16), and the front side of the heat conduction silica gel (16) is contacted with the control panel (2).

5. The NTC thermal time constant testing apparatus according to claim 1, characterized in that: the front side at the top of the inner cavity of the shell box body (1) is fixedly connected with a temperature and humidity sensor (17), and the front side at the right side of the control panel (2) is fixedly connected with a power line (18).

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