CN1737720A - Temperature control system and temperature control method for low temperature sensitive equipment - Google Patents

Abstract

This invention discloses one temperature control system with low temperature sensor device, which comprises the following parts: power module to supply power to system; temperature test and control module to test temperature and to control first switch module according to test results; first switch module to control heater switch; heater to heating up sensor device; low temperature sensitive supply power to supply power to sensitive parts; second switch module to test and control the power switch. This invention discloses one temperature control method.

Description

Temperature control system and temperature control method for low temperature sensitive equipment

technical field

The invention relates to the field of temperature control, in particular to a temperature control system and a temperature control method for low temperature sensitive equipment.

Background technique

Most of the existing electronic and electrical equipment, especially complex electronic and electrical equipment for communication, is mainly used indoors. The indoor air circulation is less, the temperature is easy to control, and the temperature is relatively stable, so as to ensure the stable operation of electronic and electrical equipment. However, with the improvement of people's living standards, the demand for communication has increased sharply, and telecom operators hope to quickly build a batch of low-cost communication sites. In order to realize the low cost of the communication site, on the one hand, the equipment itself needs to be low in price, and on the other hand, the equipment room investment is also required to be reduced as much as possible. The easiest way to reduce the investment in equipment room facilities is to make the equipment work outdoors, that is, outdoor equipment. In this way, the equipment is required to work around the clock and must be able to adapt to changes in ambient temperature.

In order to meet the requirement that the equipment can work around the clock, the existing implementation solutions usually use military or industrial grade components. With this solution, the price of general military devices is 5-10 times that of commercial-grade devices, and the price of industrial-grade devices is 2-3 times that of commercial-grade devices, resulting in expensive equipment.

Because the above solutions are expensive and cannot effectively reduce costs, some equipment manufacturers have adopted another solution, that is, a temperature control system that uses commercial-grade devices combined with a simple heating method. Its temperature control system diagram is shown in Figure 1, including temperature detection and control module, AC-DC conversion (AD/DC) conversion module and switch module. When the temperature detection and control module detects that the temperature is too low, the control switch module is turned on, the heater is powered on, and the system starts to heat up. When the temperature detection and control module detects that the temperature rises to the set temperature value, the switch module is turned off. The heater is de-energized and stops heating.

Using commercial-grade devices combined with a simple heating method, the temperature detection and control module only controls the heater. When the temperature is detected to be too low, the heater is turned on, and the power supply of the low-temperature sensitive device is not controlled. In this way, in a cold environment, although the heater is turned on to raise the temperature due to the low temperature, since the power supply of the low-temperature sensitive device is not turned off, it is easy to cause the low-temperature sensitive device to fail when the temperature has not risen enough to ensure that the low-temperature sensitive device can work normally. Started to work, resulting in failure or abnormal operation of low-temperature sensitive devices, so the reliability of equipment operation cannot be guaranteed.

Contents of the invention

In view of this, the first main purpose of the present invention is to provide a temperature control system, which can ensure that the low temperature sensitive components will not start to work until the temperature of the system rises to the point where they can work normally.

The second main purpose of the present invention is to provide a temperature control method, which can ensure that the low-temperature sensitive device will not start to work until the system temperature rises to the point where it can work normally.

In order to achieve the above-mentioned first main purpose, the present invention provides a temperature control system for low-temperature sensitive equipment, including:

The power module is used to provide power for the system;

The temperature detection and control module is used to detect the temperature and control the first switch module according to the detection result;

The first switch module is used to control the opening and closing of the heater;

Heaters for heating low temperature sensitive equipment;

Power supply for low temperature sensitive devices, used to provide power for low temperature sensitive devices;

The second switch module is used to control the opening and closing of the power supply of the low temperature sensitive device according to the temperature detection result of the temperature detection and control module;

A first control threshold temperature is set in the temperature detection and control module, and the first control threshold temperature corresponds to the minimum temperature at which the low temperature sensitive device works normally. If the temperature detection and control module detects that the current temperature is lower than the first To control the threshold temperature, the heater is turned on by controlling the first switch module, and the power supply of the low temperature sensitive device is turned off by controlling the second switch module; if the temperature detection and control module detects that the current temperature is higher than the first Once the threshold temperature is controlled, the power supply of the low temperature sensitive device is turned on by controlling the second switch module.

Preferably, the temperature detection and control module is further provided with a second control threshold temperature, the second control threshold temperature is higher than the first control threshold temperature, and lower than the maximum temperature to ensure the normal operation of the equipment, if the temperature detection and control module If it is detected that the current temperature is higher than the second control threshold temperature, the heater is turned off by controlling the first switch module.

Preferably, the temperature detection and control module is a temperature sensing controller.

The switch module can be a transistor.

The switch module can also be a low-power relay.

In order to achieve the above-mentioned second main purpose, the present invention also provides a temperature control method for low-temperature sensitive equipment, the method comprising steps:

A. Detect the temperature. If it is detected that the current temperature is lower than the first control threshold temperature, control the heater to be in the on state, and control the power supply of the low temperature sensitive device to be in the off state.

Step A further includes: if it is detected that the current temperature is higher than the first control threshold temperature, controlling the power supply of the low temperature sensitive device to be in an on state.

Before step A, further include:

A first control threshold temperature is set, and the first control threshold temperature corresponds to the lowest temperature at which the low temperature sensitive device works normally.

Preferably, before step A, it further includes: setting the hysteresis temperature of the power supply of the low temperature sensitive device, and the hysteresis temperature of the power supply of the low temperature sensitive device is higher than the first control threshold temperature, then step A further includes:

If it is detected that the current temperature is higher than the hysteresis temperature when the power supply of the low-temperature sensitive device is turned on, control the power supply of the low-temperature sensitive device so that it is in the on state; When the first control threshold temperature is reached, the power supply of the low temperature sensitive device is turned off.

Step A may further include:

If it is detected that the current temperature is equal to the first control threshold temperature, the power supply of the low temperature sensitive device is turned off; if it is detected that the current temperature is equal to the hysteresis temperature of the power supply of the low temperature sensitive device, the power supply of the low temperature sensitive device is turned on. .

Preferably, the hysteresis temperature of the power supply of the low temperature sensitive device is at least 2 degrees Celsius higher than the first control threshold temperature.

Preferably, step A further includes: setting a second control threshold temperature, the second control threshold temperature is higher than the first control threshold temperature, and lower than the maximum temperature to ensure normal operation of the device; then step A further includes:

The temperature is detected, and if it is detected that the current temperature is higher than the second control threshold temperature, the heater is turned off.

Preferably, before step A, it further includes: setting the heater turn-on hysteresis temperature, and the heater turn-on hysteresis temperature is lower than the second control threshold temperature; then step A further includes:

If the original state of the heater is off, when it is detected that the current temperature is lower than the hysteresis temperature of the heater, the heater is turned on.

Preferably, step A further includes: if it is detected that the current temperature is equal to the second control threshold temperature, turning off the heater; if it is detected that the current temperature is equal to the hysteresis temperature for turning on the heater, turning on the heater.

Preferably, the second control threshold is at least 2 degrees Celsius higher than the hysteresis temperature of the heater.

Preferably, the first control threshold temperature is the lowest temperature at which the low temperature sensitive components in the device work normally, and the second control threshold temperature is 5 to 30 degrees Celsius higher than the first control threshold temperature.

It can be seen from the above scheme that in the temperature control system of the present invention, the temperature detection and control module not only controls the heater, but also controls the power supply of the low-temperature sensitive device, ensuring that the low-temperature sensitive device can work normally. Therefore, the service life of the low temperature sensitive device is increased, and the reliability of the equipment is greatly improved.

In the temperature control method in the present invention, since the power supply of the heater and the low-temperature sensitive device is controlled, the normal operation of the low-temperature sensitive device is guaranteed, thereby greatly increasing the service life of the low-temperature sensitive device and greatly improving the efficiency of the equipment. Reliability; and by setting the hysteresis temperature of the power supply of the low-temperature sensitive device and the hysteresis temperature of the heater, the opening and closing are controlled by different thresholds, which prevents the switching module from constantly changing when the temperature fluctuates at the threshold temperature point. The opening and closing of these components increases the service life of these components, and also increases the stability of the temperature control system and the entire equipment.

Description of drawings

Fig. 1 is the temperature control system figure of prior art;

Fig. 2 is the temperature control system figure in the specific embodiment one of the present invention;

Fig. 3 is a schematic diagram of the temperature sensing controller in the first embodiment of the present invention;

Fig. 4 is a schematic diagram of temperature setting threshold and hysteresis zone of the present invention;

Fig. 5 is the control flowchart of the power supply to the low temperature sensitive device in the second embodiment of the present invention;

Fig. 6 is the flow chart of the control of the heater in the second embodiment of the present invention;

Fig. 7 is a control flow chart of the third embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

The main idea of the present invention is: by controlling the power supply of the low-temperature sensitive device, the low-temperature sensitive device will not be powered on when the temperature is too low, and the power supply of the low-temperature sensitive device will be turned on after the temperature rises to a specific value, thereby realizing the low-temperature sensitive device. Protection of low temperature sensitive devices.

The first embodiment of the present invention is a temperature control system, as shown in Figure 2, the temperature control system includes a temperature detection and control module, a switch module 1, a switch module 2, a heater, a power supply module and a power supply for low temperature sensitive devices Power supply; wherein, the power module includes an AC power supply and an AD/DC module, which is used to provide power for the system; the switch module 1 is used to control the opening and closing of the heater; the switching module 2 is used to control the opening and closing of the low temperature sensitive device power supply The temperature detection and control module is used to detect the temperature, and control the switch module 1 and the switch module 2 according to the detected temperature.

A temperature control threshold is set on the temperature detection and control module, and the switch module 1 and the switch module 2 are controlled according to the set temperature control threshold and the detected temperature.

The temperature detection and control module sets the temperature control threshold as follows: set the control threshold temperature t1 of the power supply of the low-temperature sensitive device and the control threshold temperature t4 of the heater in the temperature detection and control module, and compare them through the hysteresis in the temperature detection module Set the hysteresis temperature hysteresis Δt1 of the control threshold temperature t1 of the power supply of the low temperature sensitive device, and the hysteresis temperature hysteresis Δt2 of the heater control threshold temperature t4, using the above temperature hysteresis, the power supply of the low temperature sensitive device The hysteresis temperature of the control threshold temperature t2=t1+Δt1; the hysteresis temperature of the heater control threshold temperature t3=t4-Δt2; wherein, the purpose of the above-mentioned temperature hysteresis design is to prevent frequent Turns power on and off to heaters or low temperature sensitive devices.

Wherein, in the present invention, the above-mentioned temperature selection ranges of t1 and t4 are set according to the low temperature range in which the low-temperature sensitive devices in the equipment can work normally. Usually, the setting of t1 is the lowest temperature to ensure the operation of the low-temperature sensitive devices. , t4 is 5-30°C higher than t1; the temperature return difference Δt1 and Δt2 can be the same or different, and the selection range is: Δt1≥2°C; Δt2≥2°C.

The temperature detection and control module detects the system temperature, and controls the switch module 1 and switch module 2 according to the detection result and the set temperature control threshold, and the switch module 2 is turned on or off according to the control of the temperature detection and control module The power supply of the low temperature sensitive device, the switch module 1 turns on or off the heater according to the temperature detection and the control of the control module, so as to realize the control of the heater and the low temperature sensitive device. The general control process of the temperature control system is as follows:

If the temperature detection and control module detects that the current temperature is lower than t1, the power supply of the low temperature sensitive device is turned off by turning off the switch module 2, and the heater is turned on by turning on the switch module 1, so that at the current temperature When the temperature is lower than the normal working temperature of the low-temperature sensitive device, on the one hand, the current temperature is raised by the heating of the heater, and on the other hand, the low-temperature sensitive device does not work, so as to avoid the failure or abnormality of the device; if the temperature detection and control module Detecting that the current temperature is higher than t4, the heater is turned off by closing the switch module 1, so that the current temperature no longer increases due to heating by the heater;

Considering the temperature hysteresis, the control process of the temperature control system can also be:

If the temperature detection and control module detects that the temperature is lower than t1, the power supply of the low temperature sensitive device is turned off by closing the switch module 2, and the heater is turned on by turning on the switch module 1. As the temperature rises, when the current temperature reaches At t1, in order to avoid repeatedly turning on or off the power supply of the low-temperature sensitive device near the temperature point t1, the power supply of the low-temperature sensitive device is still turned off, and when the temperature continues to rise to the hysteresis temperature t2, the temperature detection And the control module turns on the power supply of the low temperature sensitive device by opening the switch module 2; When the temperature drops to t1, the power supply of the low-temperature sensitive device is changed from the on state to the off state; it can be seen that by adopting the hysteresis temperature t2, it is possible to avoid repeatedly turning on or off the power supply of the low-temperature sensitive device near the temperature point t1;

If the temperature detection and control module detects that the temperature is higher than t4, the power supply of the low temperature sensitive device is turned on by turning on the switch module 2, and the heater is turned off by turning off the switch module 1. As the temperature drops, When the current temperature reaches t4, in order to avoid repeatedly turning on or off the heater near the temperature point t4, the heater is still turned off. When the temperature continues to drop to the hysteresis temperature t4, the temperature detection and control module will Turn on the heater by turning on the switch module 1; if the current temperature is in the heating process, the control of the power supply of the heater and the low temperature sensitive device is consistent with the general control process as described above, so that when the temperature rises to t4, the heater From the on state to the off state; it can be seen that by adopting the hysteresis temperature t4, it is possible to avoid repeatedly turning on or off the heater near the temperature point t4.

In this embodiment, the temperature detection and control module is preferably a programmable temperature sensor controller TMP01FS, and its schematic diagram is shown in FIG. 3 . The TMP01FS temperature sensor controller has two outputs, where the /OVER output terminal is connected to the switch module 1, and the /UNDER output terminal is connected to the switch module 2. The setting of the temperature point is realized by adjusting the three resistors on the periphery of the TMP01FS. SET HIGH corresponds to the setting of t4, SET LOW corresponds to the setting of t1, Δt1 and Δt2 are the same as Δt here, and the setting of t1, t4 and temperature hysteresis Δt is realized by setting and selecting the programming resistor.

The switch module 1 and the switch module 2 in this embodiment may be transistors or low-power relays.

The second embodiment of the present invention is a temperature control method for low-temperature sensitive equipment. The method is applied to equipment with low-temperature sensitive devices. According to the temperature detection result and the set threshold temperature, the heater and low-temperature The power supply of sensitive devices is controlled. In this embodiment, the power supply and the heater of the low temperature sensitive device are controlled separately.

The control process for low temperature sensitive devices is as follows:

The control threshold temperature t1 of the power supply of the low temperature sensitive device and the hysteresis temperature hysteresis Δt1 of t1 are preset, and the hysteresis temperature t2=t1+Δt1 of the control threshold temperature of the power supply of the low temperature sensitive device is utilized by using the temperature hysteresis; wherein, The purpose of the above temperature hysteresis design is to prevent the power supply of the low temperature sensitive device from being frequently turned on and off when the temperature fluctuates up and down the threshold.

Detect the system temperature, and according to the detection result and the set temperature control threshold, the general control process for temperature control of the power supply of the low temperature sensitive device is as follows:

If it is detected that the current temperature is lower than t1, the power supply of the low temperature sensitive device is turned off, so that when the current temperature is lower than the temperature at which the low temperature sensitive device can work normally, the low temperature sensitive device does not work, thereby avoiding the failure of the device or exception;

Considering the temperature hysteresis, the control process of the temperature control can also be:

If the detected temperature is lower than t1, the power supply of the low-temperature sensitive device is turned off. As the temperature rises, when the current temperature reaches t1, in order to avoid repeatedly turning on or off the power supply of the low-temperature sensitive device near the temperature point t1, The power supply of the low temperature sensitive device is still turned off, and when the temperature continues to rise to the hysteresis temperature t2, the power supply of the low temperature sensitive device is turned on; if the current temperature is in the cooling process, the control of the power supply of the low temperature sensitive device Consistent with the general control process described above, so that when the temperature drops to t1, the power supply of the low-temperature sensitive device is changed from the on state to the off state; it can be seen that by using the hysteresis temperature t2, it is possible to avoid the temperature at the temperature point t1 Repeatedly turn on or off the power supply of low temperature sensitive devices nearby;

As shown in Figure 4, the solid line represents the level state of the power supply of the low temperature sensitive device. When the temperature rises, the change curve of the power supply level state of the low temperature sensitive device is: A->B->C->D, temperature When falling, the change curve of the power supply level state of the low temperature sensitive device is: D'->C'->B'->A'.

For the sake of clarity, the control flow of the power supply for the low temperature sensitive device in this embodiment will be described in the form of a flow chart below. As shown in Figure 5, the specific steps are:

Step 501, power on the device, where the device refers to the general power of the entire device is turned on;

Step 502, detect the system temperature, if the system temperature is lower than t2, execute step 503; otherwise, execute step 504;

Step 503, control the power supply of the low-temperature sensitive device to make it in an off state, and then execute step 506;

Step 504, controlling the power supply of the low temperature sensitive device to be in the on state;

Step 505, when it is detected that the temperature reaches t1, turn off the power supply of the low temperature sensitive device, and then execute step 506;

Step 506 , judging whether the device is powered off, that is, whether the total power supply is turned off, if the judging result is yes, then end the procedure; otherwise, return to step 502 .

The above is the control of the power supply of the low temperature sensitive device in this method, and the control of the heater in this method will be described below.

Preset the control threshold temperature t4 of the heater and the hysteresis temperature hysteresis Δt2 of t4, and use the temperature hysteresis to realize the hysteresis temperature t3=t4-Δt2 of the control threshold temperature of the heater; the same as the power supply for low temperature sensitive devices The threshold of the temperature difference is similar, and the purpose of the above-mentioned temperature hysteresis design is to prevent the heater from being turned on and off frequently when the temperature fluctuates up and down the threshold.

Detect the system temperature, and according to the detection result and the set temperature control threshold, the general control process for temperature control of the heater is as follows:

If it is detected that the current temperature is lower than t4, the heater is turned on, so that the system can be heated when the temperature is low; if it is detected that the current temperature is higher than t4, the heater is turned off, so that the current temperature is no longer due to The heating of the heater increases;

Considering the temperature hysteresis, the control process of the temperature control can also be:

If the detected temperature is higher than t4, the heater is turned off. As the temperature drops, when the current temperature reaches t4, in order to avoid turning on or off the heater repeatedly near the temperature point t4, the heater is still turned off. When the temperature continues to drop to the hysteresis temperature t3, the heater is turned on; if the current temperature is in the process of heating up, the control of the heater is consistent with the general control process described above, so that when the temperature rises to t4, the heating It can be seen that by adopting the hysteresis temperature t3, the heater can be avoided to be turned on or off repeatedly near the temperature point t4.

As shown in Figure 4, when the temperature rises, the change curve of the heater level state is: E->F->G->H, and when the temperature drops, the change curve of the power level state is: H'->G' ->F'->E'.

For the sake of clarity, the flow chart for controlling the heater in this embodiment will be described below. As shown in Figure 6, the specific steps are:

Step 601, power on the device, where the device refers to the general power of the entire device is turned on;

Step 602, detect the system temperature, if the system temperature is lower than t4, execute step 603; otherwise, execute step 604;

Step 603, control the heater to be in the on state, and then execute step 606;

Step 604, controlling the heater so that it is in an off state;

Step 605, when it is detected that the system temperature reaches t3 or lower than t3, turn on the heater, and then execute step 606;

Step 606 , judge whether the device is powered off, that is, whether the total power is turned off, if the judgment result is yes, then end the process; otherwise, return to step 602 .

Wherein, in the present invention, the above-mentioned temperature selection ranges of t1 and t4 are set according to the low temperature range in which the low-temperature sensitive devices in the equipment can work normally. Usually, the setting of t1 is the lowest temperature to ensure the operation of the low-temperature sensitive devices. , t4 is 5-30°C higher than t1; the temperature return difference Δt1 and Δt2 can be the same or different, and the selection range is: Δt1≥2°C; Δt2≥2°C.

In the second embodiment, the power supply of the low-temperature sensitive device and the power supply of the heater are controlled separately, and the following specific embodiment 3 is a temperature control method for simultaneously controlling the power supply of the heater and the low-temperature sensitive device.

The third specific embodiment is a temperature control method, which is applied to equipment with low-temperature sensitive devices, and controls the heater in the equipment and the power supply of the low-temperature sensitive devices.

The control of the power supply control of the heater and the low temperature sensitive device will be described in detail below.

Preset the control threshold temperature t1 of the power supply of the low temperature sensitive device and the control threshold temperature t4 of the heater, set the hysteresis temperature hysteresis Δt1 of the control threshold temperature t1 of the power supply of the low temperature sensitive device, and the hysteresis temperature hysteresis Δt1 of the heater control threshold temperature t4 Hysteresis temperature hysteresis Δt2, using the above-mentioned temperature hysteresis, the hysteresis temperature t2=t1+Δt1 of the power supply control threshold temperature of the low-temperature sensitive device; the hysteresis temperature t3=t4-Δt2 of the heater control threshold temperature; wherein, The purpose of the above-mentioned temperature hysteresis design is to prevent frequent turning on and off of the power supply of the heater or the low temperature sensitive device when the temperature fluctuates up and down the threshold. The specific settings are shown in Figure 4, where the horizontal axis represents the temperature, and the vertical axis represents the level state, that is, the switch state, high level is on, and low level is off.

Wherein, in the present invention, the above-mentioned temperature selection ranges of t1 and t4 are set according to the low temperature range in which the low-temperature sensitive devices in the equipment can work normally. Usually, the setting of t1 is the lowest temperature to ensure the operation of the low-temperature sensitive devices. , t4 is 5-30°C higher than t1; the temperature return difference Δt1 and Δt2 can be the same or different, and the selection range is: Δt1≥2°C; Δt2≥2°C.

The system temperature is detected, and according to the detection result and the set temperature control threshold, the power supply heater of the low temperature sensitive device is controlled. The general control process of temperature control is as follows:

If it is detected that the current temperature is lower than t1, the power supply of the low temperature sensitive device is turned off, and the heater is turned on, so that when the current temperature is lower than the temperature at which the low temperature sensitive device can work normally, on the one hand, by heating The heating of the heater increases the current temperature, on the other hand, the low temperature sensitive device does not work, so as to avoid the failure or abnormality of the device; if the current temperature is detected to be higher than t4, the heater is turned off, so that the current temperature is no longer due to heating The heating of the device increases;

Considering the temperature hysteresis, the control process of the temperature control can also be:

If the detected temperature is lower than t1, the power supply of the low-temperature sensitive device is turned off. As the temperature rises, when the current temperature reaches t1, in order to avoid repeatedly turning on or off the power supply of the low-temperature sensitive device near the temperature point t1, The power supply of the low temperature sensitive device is still turned off, and when the temperature continues to rise to the hysteresis temperature t2, the power supply of the low temperature sensitive device is turned on; if the current temperature is in the cooling process, the control of the power supply of the low temperature sensitive device Consistent with the general control process described above, so that when the temperature drops to t1, the power supply of the low-temperature sensitive device is changed from the on state to the off state; it can be seen that by using the hysteresis temperature t2, it is possible to avoid the temperature at the temperature point t1 Repeatedly turn on or off the power supply of low temperature sensitive devices nearby;

If the detected temperature is higher than t4, the heater is turned off. As the temperature drops, when the current temperature reaches t4, in order to avoid turning on or off the heater repeatedly near the temperature point t4, the heater is still turned off. When the temperature continues to drop to the hysteresis temperature t3, turn on the heater; if the current temperature is in the process of heating up, the control of the heater is consistent with the general control process as described above, so that when the temperature rises to t4, The heater changes from the on state to the off state; it can be seen that by adopting the hysteresis temperature t3, it is possible to avoid repeatedly turning on or off the heater near the temperature point t4.

As shown in Figure 4, when the temperature rises, the change curve of the power supply level state of the low temperature sensitive device is: A->B->C->D, when the temperature drops, the power supply level state of the low temperature sensitive device The change curve is: D'->C'->B'->A'; when the temperature rises, the change curve of the heater level state is: E->F->G->H, when the temperature drops, the heater The change curve of the level state is: H'->G'->F'->E'.

In this embodiment, the process of controlling the power supply of the heater and the low temperature sensitive device is shown in Figure 7, and the specific steps are:

Step 701, power on the device, where the power on of the device refers to the power on of the total power of the device;

Step 702, detect system temperature T, if T≥t4, execute step 703; if t2≤T<t4, execute step 708; if T<t2, execute step 712;

Step 703, controlling the heater to be in the off state, controlling the power supply of the low temperature sensitive device to be in the on state;

Step 704, determine whether the device is powered off, if the device is powered off, end this process, otherwise execute step 705;

Step 705, when it is detected that the system temperature T reaches or is lower than t3, turn on the heater; before the temperature reaches t3, keep the state of the heater and the power supply of the low temperature sensitive device unchanged;

Step 706, determine whether the device is powered off, if the device is powered off, end this process, otherwise execute step 707;

Step 707, detect the system temperature T, if T≥t4, return to step 703; if T≤t1, perform step 711; before the temperature reaches t4 or reaches t1, keep the power supply status of the heater and the low temperature sensitive device unchanged;

Step 708, controlling the heater to be in the on state; controlling the power supply of the low temperature sensitive device to be in the on state;

Step 709, determine whether the device is powered off, if the device is powered off, end this process, otherwise execute step 710;

Step 710, detect the system temperature T, if T≥t4, return to step 703; if T≤t1, perform step 711; before the temperature reaches t4 or reaches t1, keep the power supply status of the heater and the low temperature sensitive device unchanged;

Step 711, control the power supply of the low-temperature sensitive device so that it is in the off state, keep the heater in the on state, and then execute step 713;

Step 712, control the heater to be in the on state, control the power supply of the low temperature sensitive device to be in the off state, and then perform step 713;

Step 713. Determine whether the device is powered off. If the device is powered off, end the procedure; otherwise, execute step 702.

The above are specific examples of the present invention, and the method according to the present invention can be appropriately improved during the specific implementation process to meet the specific needs of specific situations. Therefore, it can be understood that the specific implementation manners according to the present invention are only exemplary, and are not intended to limit the protection scope of the present invention.

Claims (16)

1, a kind of low-temperature sensitive device temperature control system, comprising: power module is used to system that power supply is provided; Temperature detection and control module are used for temperature is detected, and control first switch module according to testing result; First switch module is used for the opening and closing of control heater; Well heater is used to low-temperature sensitive equipment to heat up; It is characterized in that this temperature control system also comprises:

The power supply of low-temperature sensitive device is used to the low-temperature sensitive device that power supply is provided;

The second switch module is used for controlling according to the temperature detection result of temperature detection and control module the opening and closing of the power supply of low-temperature sensitive device;

In described temperature detection and control module, be provided with the first control threshold temperature, this first control threshold temperature is corresponding to the minimum temperature of low-temperature sensitive device operate as normal, if detecting Current Temperatures, temperature detection and control module be lower than this first control threshold temperature, then make well heater be in opening, and make the power supply of low-temperature sensitive device be in closed condition by control second switch module by controlling first switch module; Be higher than this first control threshold temperature if temperature detection and control module detect Current Temperatures, then make the power supply of low-temperature sensitive device be in opening by control second switch module.

2, system according to claim 1, it is characterized in that, further be provided with the second control threshold temperature in described temperature detection and the control module, this second control threshold temperature is higher than the first control threshold temperature, and be lower than the maximum temperature of assurance equipment operate as normal, be higher than this second control threshold temperature if temperature detection and control module detect Current Temperatures, then make well heater be in closed condition by controlling first switch module.

3, system according to claim 1 is characterized in that, described temperature detection and control module are temperature sensing controller.

4, system according to claim 1 is characterized in that, described switch module is a transistor.

5, system according to claim 1 is characterized in that, described switch module is a low power relay.

6, a kind of low-temperature sensitive device temperature control method is characterized in that the method comprising the steps of:

A, temperature is detected, be lower than the first control threshold temperature if detect Current Temperatures, control heater makes it be in opening, and the power supply of control low-temperature sensitive device makes it be in closed condition.

7, method as claimed in claim 6 is characterized in that, described steps A further comprises: be higher than the first control threshold temperature if detect Current Temperatures, the power supply of control low-temperature sensitive device makes it be in opening.

8, method according to claim 6 is characterized in that, before described steps A, further comprises:

The first control threshold temperature is set, and this first control threshold temperature is corresponding to the minimum temperature of low-temperature sensitive device operate as normal.

9, method according to claim 6, it is characterized in that, before the described steps A, further comprise: the power supply that the low-temperature sensitive device is set is opened back stagnant temperature, the power supply of this low-temperature sensitive device is opened back stagnant temperature and is higher than the first control threshold temperature, and then described steps A further comprises:

Open back stagnant temperature if detect the power supply that Current Temperatures is higher than the low-temperature sensitive device, the power supply of control low-temperature sensitive device makes it be in opening; If the power supply of low-temperature sensitive device was opening originally, be lower than first control during threshold temperature when detecting Current Temperatures, close the power supply of low-temperature sensitive device.

10, method according to claim 9 is characterized in that, described steps A further comprises:

Equal the first control threshold temperature if detect Current Temperatures, make the power supply of low-temperature sensitive device be in closed condition; Open back stagnant temperature if detect the power supply that Current Temperatures equals the low-temperature sensitive device, make the power supply of low-temperature sensitive device be in opening.

11, method according to claim 9 is characterized in that, the power supply of described low-temperature sensitive device is opened back stagnant temperature and is higher than at least 2 degrees centigrade of the first control threshold temperatures.

12, according to the described method of arbitrary claim in the claim 6 to 11, it is characterized in that, further comprise before the described steps A: the second control threshold temperature is set, and this second control threshold temperature is higher than the first control threshold temperature, and is lower than the maximum temperature of assurance equipment operate as normal; Then described steps A further comprises:

Temperature is detected, be higher than the second control threshold temperature, make well heater be in closed condition if detect Current Temperatures.

13, method according to claim 12 is characterized in that, further comprises before the described steps A: well heater is set opens back stagnant temperature, this well heater is opened back stagnant temperature and is lower than the second control threshold temperature; Then described steps A further comprises:

If the well heater previous status is a closed condition, when detecting Current Temperatures and be lower than well heater and open back stagnant temperature, heater.

14, method according to claim 13 is characterized in that, described steps A further comprises: equal the second control threshold temperature if detect Current Temperatures, close well heater; If detecting Current Temperatures equals well heater and opens back stagnant temperature, heater.

15, method according to claim 13 is characterized in that, the described second control gate limit for height is opened back at least 2 degrees centigrade of stagnant temperature in well heater.

16, method according to claim 13 is characterized in that, the described first control threshold temperature is the minimum temperature of the low-temperature sensitive device operate as normal in the equipment, and the second control threshold temperature is higher than 5 to 30 degrees centigrade of the first control threshold temperatures.

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