阅读说明：本技术 温湿度试验箱高温保护装置 (Temperature and humidity test box high temperature protection device ) 是由 王建国 于 2019-10-18 设计创作，主要内容包括：本发明涉及温湿度试验箱。本发明解决了目前温湿度试验箱高温异常时有可能造成待测样品损毁的问题,提供了一种温湿度试验箱高温保护装置,其技术方案可概括为：温湿度试验箱高温保护装置,包括待测样品供电输入端及温度检测判断模块,所述待测样品供电输入端用于接入外接电源,并能够为位于温湿度试验箱内的待测样品供电,当温度检测判断模块检测到温湿度试验箱内温度超过预设值时,切断待测样品供电输入端的外接电源对位于温湿度试验箱内的待测样品的供电。本发明的有益效果是：可在温湿度试验箱高温异常时切断待测样品的供电,保护待测样品的安全,适用于温湿度试验箱的高温保护。(The invention relates to a temperature and humidity test chamber. The invention solves the problem that a sample to be tested is possibly damaged when the temperature of the temperature and humidity test chamber is abnormal at present, and provides a temperature and humidity test chamber high-temperature protection device, which has the technical scheme that: temperature and humidity test case high temperature protection device, including the sample power supply input that awaits measuring and temperature detection judge module, the sample power supply input that awaits measuring is used for inserting external power supply to can be for the sample power supply that awaits measuring that is located the temperature and humidity test incasement, when temperature detection judge module detects temperature in the temperature and humidity test incasement and surpasss the default, cut off the external power supply of the sample power supply input that awaits measuring to the sample that awaits measuring that is located the temperature and humidity test incasement. The invention has the beneficial effects that: the power supply of the sample to be tested can be cut off when the temperature and humidity test box is abnormal at high temperature, the safety of the sample to be tested is protected, and the temperature and humidity test box is suitable for high-temperature protection of the temperature and humidity test box.)

1. Temperature and humidity test case high temperature protection device, its characterized in that includes the sample power supply input end that awaits measuring and temperature detection judge module, the sample power supply input end that awaits measuring is used for inserting external power supply to can be for the sample power supply that awaits measuring that is located the temperature and humidity test incasement, when temperature detection judge module detects temperature in the temperature and humidity test incasement and surpasses the default, cut off the external power supply of the sample power supply input end that awaits measuring and to the sample's that awaits measuring power supply that is located the temperature and humidity test incasement.

2. The temperature and humidity test chamber high temperature protection device of claim 1, wherein the temperature detection and judgment module comprises a temperature detection unit and a temperature judgment control unit, the temperature detection unit is connected with the temperature judgment control unit;

the temperature detection unit can be arranged in the used temperature and humidity test box and is used for detecting the current temperature in the temperature and humidity test box and transmitting the current temperature to the temperature judgment unit;

the temperature judgment control unit is used for judging whether the current temperature transmitted by the temperature detection unit exceeds a preset value or not, and if the current temperature exceeds the preset value, the external power supply of the power supply input end of the sample to be detected is cut off to supply power to the sample to be detected in the temperature and humidity test box.

3. The high temperature protection device for the temperature and humidity test chamber according to claim 2, wherein the temperature detection and determination unit comprises a live wire access end, a zero wire access end, a control circuit, a control switch, a shunt release and a first relay, the live wire access end and the zero wire access end are respectively connected with a power supply end of the control circuit,

two ends of the control switch, which are connected with the control coil of the first relay in series, are respectively connected with the live wire access end and the zero line access end in a one-to-one correspondence manner;

the two ends of the first normally open contact of the first relay, which are connected with the control coil of the shunt release in series, are respectively connected with the live wire access end and the zero line access end in a one-to-one correspondence manner;

the power supply input end of the sample to be detected is used for being connected with the sample to be detected through a normally closed switch of the shunt release for supplying power, the output end of the control circuit is connected with the control end of the control switch, and the input end of the control circuit is connected with the temperature detection unit;

the control circuit is used for judging whether the current temperature transmitted by the temperature detection unit exceeds a preset value or not, and controlling the control switch to be closed if the current temperature exceeds the preset value.

4. The temperature and humidity test chamber high temperature protection device of claim 3, further comprising a first key switch, wherein the first relay further comprises a second normally open contact, the second normally open contact of the first relay is connected in series with the first key switch to form a locking and unlocking switch, and the locking and unlocking switch is connected in parallel with the control switch.

5. The temperature and humidity test chamber high temperature protection device of claim 3 or 4, further comprising a linked power switch, wherein the live line access end and the zero line access end can be connected with a mains supply through the linked power switch.

6. The temperature and humidity test chamber high temperature protection device of claim 5, further comprising an alarm module, wherein the alarm module is connected to the temperature detection module, and when the temperature detection module detects that the temperature in the chamber exceeds a preset value, the alarm module is notified to send an alarm message.

7. The temperature and humidity test chamber high temperature protection device of claim 6, wherein the alarm information is sound and/or light alarm information.

8. The temperature and humidity test chamber high temperature protection device according to claim 7, wherein the alarm module comprises a second relay, and further comprises an indicator light and/or a buzzer, and a control coil of the second relay is connected in parallel with a control coil of the shunt release;

when the shunt release is provided with the indicating lamp, the indicating lamp is connected with the first normally open contact of the second relay in series to form an indicating lamp circuit, and the indicating lamp circuit is connected with the control coil of the shunt release in parallel;

when the shunt release is provided with the buzzer, the buzzer is connected with the second normally open contact of the second relay in series to form a buzzer circuit, and the buzzer circuit is connected with the control coil of the shunt release in parallel.

9. The high-temperature protection device for the temperature and humidity test chamber as claimed in claim 8, further comprising a third relay and a second key switch, wherein a normally open contact of the third relay is connected in parallel with the second key switch and then connected in series with a control coil of the third relay to form a third relay circuit, the third relay circuit is connected in parallel with a control coil of the shunt release, and a normally closed contact of the third relay is connected in series with the buzzer circuit.

10. The temperature and humidity test chamber high temperature protection device of claim 8, further comprising a third key switch, wherein two ends of the third key switch connected in series with the buzzer are respectively connected with the live wire access end and the zero wire access end in a one-to-one correspondence manner.

Technical Field

The invention relates to a temperature and humidity test chamber, in particular to a high-temperature protection technology of the temperature and humidity test chamber.

Background

The temperature and humidity test box is suitable for reliability tests of industrial products under the conditions of high temperature, low temperature, damp heat and the like, and can be used for testing various performance indexes of parts and materials of related products such as electronic and electric products, automobile and motorcycle products, aerospace products, ship and weapon products and the like under the conditions of circularly changed high temperature and low temperature (alternating) environments and damp heat.

The temperature and humidity test chamber usually carries out tests for a long time, so the temperature and humidity test chamber generally runs all the day. The following risks may occur during the daily operation:

1. the temperature and humidity test box triggers an alarm to stop the operation (for example, the temperature and humidity test box has hardware faults, a cooling water system is abnormal and cannot meet the normal operation requirement of equipment, and the like), when the alarm occurs, the temperature and humidity test box stops working, a sample to be tested in the temperature and humidity test box is still continuously supplied with power, the sample to be tested in a closed space continuously works, the temperature is gradually increased due to self heating, a safety accident that the sample to be tested is damaged or burnt is caused, and economic loss is caused to a company (particularly, high-end equipment is expensive, and the value of the high-end equipment is far beyond the temperature and humidity test box;

2. the temperature and humidity test box is likely to have uncontrolled abnormal deviation of temperature after long-term operation, so that the temperature exceeds the temperature rise preventer set value of the temperature and humidity test box and the temperature and humidity test box can still operate, and the sample to be tested in the temperature and humidity test box is likely to be damaged due to self heating.

In order to avoid the risk that the sample to be tested is damaged by high temperature caused by equipment abnormality, human error and the like of the temperature and humidity test box, a laboratory needs to arrange personnel on duty and regularly patrol to ensure the operation safety.

In the current humiture test case high temperature protection scheme, its function is only when high temperature surpasss the protection value of settlement humiture test case stop work, this is the function of humiture test case self-carrying at present, current user side still installs one set of monitored control system on the humiture test case by oneself, monitored control system reports an emergency and asks for help or increased vigilance when the humiture test case is unusual, and cut off the humiture test case power simultaneously, then maintainer goes to the scene again and handles, but probably there is personnel's carelessness and does not in time handle or high power consumption product because its self still work rapidly heats up and to handle the condition that leads to damaging or burning out after the humiture test case stops.

Disclosure of Invention

The invention provides a high-temperature protection device for a temperature and humidity test chamber, which aims to solve the problem that a sample to be tested is possibly damaged when the temperature of the temperature and humidity test chamber is abnormal at present.

The invention solves the technical problem, and adopts the technical scheme that:

temperature and humidity test case high temperature protection device, including the sample power supply input that awaits measuring and temperature detection judge module, the sample power supply input that awaits measuring is used for inserting external power supply to can be for the sample power supply that awaits measuring that is located the temperature and humidity test incasement, when temperature detection judge module detects temperature in the temperature and humidity test incasement and surpasss the default, cut off the external power supply of the sample power supply input that awaits measuring to the sample that awaits measuring that is located the temperature and humidity test incasement.

Further, in order to provide a temperature detection and judgment module, the temperature detection and judgment module comprises a temperature detection unit and a temperature judgment control unit, and the temperature detection unit is connected with the temperature judgment control unit;

the temperature detection unit can be arranged in the used temperature and humidity test box and is used for detecting the current temperature in the temperature and humidity test box and transmitting the current temperature to the temperature judgment unit;

the temperature judgment control unit is used for judging whether the current temperature transmitted by the temperature detection unit exceeds a preset value or not, and if the current temperature exceeds the preset value, the external power supply of the power supply input end of the sample to be detected is cut off to supply power to the sample to be detected in the temperature and humidity test box.

Specifically, in order to provide a specific circuit of the temperature, humidity and high temperature protection device, the temperature detection and judgment unit comprises a live wire access end, a zero line access end, a control circuit, a control switch, a shunt release and a first relay, the live wire access end and the zero line access end are respectively connected with a power supply end of the control circuit,

two ends of the control switch, which are connected with the control coil of the first relay in series, are respectively connected with the live wire access end and the zero line access end in a one-to-one correspondence manner;

the two ends of the first normally open contact of the first relay, which are connected with the control coil of the shunt release in series, are respectively connected with the live wire access end and the zero line access end in a one-to-one correspondence manner;

the power supply input end of the sample to be detected is used for being connected with the sample to be detected through a normally closed switch of the shunt release for supplying power, the output end of the control circuit is connected with the control end of the control switch, and the input end of the control circuit is connected with the temperature detection unit;

the control circuit is used for judging whether the current temperature transmitted by the temperature detection unit exceeds a preset value or not, and controlling the control switch to be closed if the current temperature exceeds the preset value.

Still further, for providing fault locking and corresponding manual unlocking functions, the lock device further comprises a first key switch, the first relay further comprises a second normally open contact, the second normally open contact of the first relay is connected with the first key switch in series to form a locking and unlocking switch, and the locking and unlocking switch is connected with the control switch in parallel.

Specifically, for improving the security, still include the switch of linkage, live wire incoming end and zero line incoming end can be connected with the commercial power through the switch of linkage.

And further, the alarm device also comprises an alarm module for prompting the tester, wherein the alarm module is connected with the temperature detection module, and when the temperature detection module detects that the temperature in the box exceeds a preset value, the alarm module is informed to send alarm information.

Specifically, in order to provide an alarm message, the alarm message is an acoustic and/or optical alarm message, such as a buzzer and/or an indicator light.

Still further, in order to provide a circuit structure of the alarm module, the alarm module comprises a second relay, an indicator light and/or a buzzer, and a control coil of the second relay is connected in parallel with a control coil of the shunt release;

when the shunt release is provided with the indicating lamp, the indicating lamp is connected with the first normally open contact of the second relay in series to form an indicating lamp circuit, and the indicating lamp circuit is connected with the control coil of the shunt release in parallel;

when the shunt release is provided with the buzzer, the buzzer is connected with the second normally open contact of the second relay in series to form a buzzer circuit, and the buzzer circuit is connected with the control coil of the shunt release in parallel.

Specifically, for the manual control buzzer sound release, then still include third relay and second key switch, the normally open contact of third relay and second key switch connect in parallel the back and establish ties with the control coil of third relay and constitute the third relay circuit, and the third relay circuit is parallelly connected with the control coil of shunt release, and the normally closed contact of third relay is established ties in the buzzer circuit.

Still further, for providing the detection function of buzzer, still include the third key switch, both ends after third key switch and buzzer series connection are connected with live wire incoming end and zero line incoming end one-to-one respectively.

The temperature and humidity test box high-temperature protection device has the advantages that through the temperature and humidity test box high-temperature protection device, the power supply of a sample to be tested can be cut off when the temperature and humidity test box is abnormal at high temperature, and the safety of the sample to be tested is protected.

Drawings

Fig. 1 is a system block diagram of a temperature and humidity test chamber high-temperature protection device in an embodiment of the invention.

FIG. 2 is a circuit diagram of a temperature determination control unit and an alarm module according to an embodiment of the present invention.

Wherein, L is the live wire incoming end, and N is the zero line incoming end, and KA1 is first relay, and KA2 is the second relay, and KA3 is the third relay, and K is control switch, and K1 is switch, and K2 is first key switch, and K3 is second key switch, and RH is the pilot lamp, and FM is bee calling organ.

Detailed Description

The technical solution of the present invention is described in detail below with reference to the embodiments and the accompanying drawings.

The high-temperature protection device for the temperature and humidity test chamber comprises a power supply input end of a sample to be tested and a temperature detection and judgment module, wherein the power supply input end of the sample to be tested is used for being connected with an external power supply and can supply power to the sample to be tested in the temperature and humidity test chamber, and when the temperature detection and judgment module detects that the temperature in the temperature and humidity test chamber exceeds a preset value, the external power supply at the power supply input end of the sample to be tested is cut off to supply power to the sample to be tested in the temperature and humidity test chamber.

In order to provide a temperature detection and judgment module, the temperature detection and judgment module may include a temperature detection unit and a temperature judgment control unit, the temperature detection unit is connected with the temperature judgment control unit, wherein the temperature detection unit may be disposed in a temperature and humidity test chamber used for detecting a current temperature in the temperature and humidity test chamber and transmitting the current temperature to the temperature judgment unit, and a temperature sensor or the like may be used; the temperature judgment control unit is used for judging whether the current temperature transmitted by the temperature detection unit exceeds a preset value or not, and if the current temperature exceeds the preset value, the external power supply of the power supply input end of the sample to be detected is cut off to supply power to the sample to be detected in the temperature and humidity test box.

In order to provide a specific circuit of the temperature, humidity and high temperature protection device, referring to fig. 2, the temperature detection and judgment unit comprises a live line access end L, a zero line access end N, a control circuit, a control switch K, a shunt release and a first relay KA1, the live line access end L and the zero line access end N are respectively connected with a power supply end of the control circuit, and two ends of the control switch K, which are connected in series with a control coil of the first relay KA1, are respectively connected with the live line access end L and the zero line access end N in a one-to-one correspondence manner; two ends of a first normally open contact of the first relay KA1, which are connected with a control coil of the shunt release in series, are respectively connected with a live wire access end L and a zero wire access end N in a one-to-one correspondence manner; the power supply input end of the sample to be detected is used for being connected with the sample to be detected through a normally closed switch of the shunt release for power supply, the output end of the control circuit is connected with the control end of the control switch K, and the input end of the control circuit is connected with the temperature detection unit; the control circuit is used for judging whether the current temperature transmitted by the temperature detection unit exceeds a preset value or not, and controlling the control switch K to be closed if the current temperature exceeds the preset value.

In order to provide fault locking and corresponding manual unlocking functions, the lock device further comprises a first key switch K2, the first relay KA1 further comprises a second normally open contact, the second normally open contact of the first relay KA1 is connected with the first key switch K2 in series to form a locking and unlocking switch, and the locking and unlocking switch is connected with the control switch K in parallel.

In order to improve the safety, the power supply device also comprises a linked power switch K1, and the live wire access end L and the zero line access end N can be connected with the commercial power through the linked power switch K1.

In order to prompt the testing personnel, the temperature alarm device also comprises an alarm module, wherein the alarm module is connected with the temperature detection module, and when the temperature detection module detects that the temperature in the box exceeds a preset value, the temperature detection module informs the alarm module to send out alarm information.

To provide an alarm message, the alarm message may be an acoustic and/or optical alarm message, such as a buzzer FM and/or an indicator RH.

In order to provide a circuit structure of the alarm module, referring to fig. 2, the alarm module may include a second relay KA2, and further include an indicator light RH and/or a buzzer FM, and a control coil of the second relay KA2 is connected in parallel with a control coil of the shunt release; when the indicating lamp RH is arranged, the indicating lamp RH is connected with the first normally open contact of the second relay KA2 in series to form an indicating lamp circuit, and the indicating lamp circuit is connected with the control coil of the shunt release in parallel; when the buzzer FM is arranged, the buzzer FM is connected with the second normally open contact of the second relay KA2 in series to form a buzzer circuit, and the buzzer circuit is connected with the control coil of the shunt release in parallel.

The manual control buzzer FM can be controlled to release sound, the manual control buzzer FM can further comprise a third relay KA3 and a second key switch K3, a normally open contact of the third relay KA3 is connected with a control coil of the third relay KA3 in parallel after being connected with the second key switch K3 in parallel to form a third relay circuit, the third relay circuit is connected with a control coil of the shunt release in parallel, and a normally closed contact of the third relay KA3 is connected in series in the buzzer circuit.

In order to provide the detection function of the buzzer, the device can further comprise a third key switch, and two ends of the third key switch, which are connected with the buzzer in series, are respectively connected with the live wire access end L and the zero line access end N in a one-to-one correspondence manner.

Through the high-temperature protection device of the temperature and humidity test box, the high-temperature protection device can be arranged in the existing temperature and humidity test box, so that the temperature detection judgment unit of the existing temperature and humidity test box can be reused, the cost is further saved, but the problem exists that if the temperature and humidity test box breaks down, the temperature detection judgment unit of the temperature and humidity test box possibly damages a sample to be detected when the temperature and humidity test box cannot be judged, therefore, an independent device can be arranged outside the existing temperature and humidity test box, only the port for supplying power to the sample to be detected and the temperature detection unit are arranged in the existing temperature and humidity test box, the existing temperature and humidity test box does not need to be greatly modified, the problem when the temperature and humidity detection judgment unit is reused can also be avoided, and of course, the temperature and humidity test box can also be arranged in the existing temperature and humidity test box.