Temperature control system for cooling water of emergency diesel generator

Abstract

The invention relates to a temperature control system for cooling water of an emergency diesel generator. The temperature control system comprises a thermal resistor, a heater and a temperature control device, the thermal resistor is mounted on a cooling water loop pipeline of the emergency diesel generator, and the temperature control device is mounted on a non-vibration working condition far away from the cooling water loop pipeline; the thermal resistor is connected with the input end of the temperature control device, and the temperature control device performs temperature conversion on a resistance signal input by the thermal resistor and outputs a start-stop instruction according to a temperature value obtained after temperature conversion; the heater is connected with the output end of the temperature control device, adjusts the temperature of cooling water in the cooling water loop pipeline according to a start-stop instruction output by the temperature control device, and is used for reducing the situation that under the vibration working condition, the temperature detection instrument is prone to drifting or abnormity of a fixed action value due to mechanical deformation. Therefore, the stability of cooling water temperature control can be improved, and the reliability of the emergency diesel generator can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of instrument control, and particularly to a temperature control system for the cooling water of an emergency diesel generator. Background Art

[0002] In a nuclear power reactor, an emergency diesel generator is used to provide emergency power supply for medium-voltage nuclear auxiliary equipment to ensure that the reactor can be safely shut down and prevent damage to important equipment due to the loss of power of the normal AC external power supply system.

[0003] The emergency diesel generator is usually equipped with a separated cooling water system. When the emergency diesel generator is in standby state, in order to prevent mechanical damage during the start-up and loading of the emergency diesel generator, it is necessary to strictly control the heating and continuous circulation of the cooling water to ensure that the cooling water temperature is always within the preset range. A temperature switch for detecting the cooling water temperature is installed on the cooling water circuit pipeline of the emergency diesel generator. When the measured temperature reaches the set value, the temperature switch outputs a control switch signal to trigger the corresponding interlock control to adjust the cooling water temperature in real time. The temperature switch installed on the cooling water circuit pipeline is a temperature switch using a metal sheet as a temperature-sensing element. During normal operation, the metal sheet is in a free state and the contact is in a closed / open state. When the temperature rises or drops to the operating temperature, the metal sheet generates internal stress due to heat and quickly moves. At this time, the contact opens / closes to cut off / connect the circuit, thus playing a thermal protection role.

[0004] Due to the high-frequency vibration that occurs during the operation of the emergency diesel generator, after the temperature switch installed on the cooling water circuit pipeline of the emergency diesel generator has been running for a long time, the mechanical components inside the temperature switch will deform under the long-term vibration of the emergency diesel generator, causing damage to the metal sheet of the temperature switch, resulting in drift or abnormality of the action setting value of the temperature switch, affecting the normal temperature control of the cooling water by the temperature switch, and further affecting the normal operation of the emergency diesel generator. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a temperature control system for the cooling water of an emergency diesel generator to reduce the situation that the action setting value of the temperature detection instrument is prone to drift or abnormality due to mechanical deformation under vibration conditions, thereby improving the stability of the cooling water temperature control and further improving the reliability of the emergency diesel generator.

[0006] The technical solution adopted by the present invention to solve its technical problems is: providing a temperature control system for the cooling water of an emergency diesel generator, including: a thermal resistor, a heater, and a temperature control device;

[0007] The thermal resistor is installed on the cooling water circuit pipeline of the emergency diesel generator, and the temperature control device is installed in a non-vibrating working condition far from the cooling water circuit pipeline;

[0008] The thermal resistor is connected to the input end of the temperature control device, and the temperature control device performs temperature conversion on the resistance signal input by the thermal resistor and outputs a start-stop command according to the temperature value obtained after the temperature conversion;

[0009] The heater is connected to the output end of the temperature control device, and the heater adjusts the temperature of the cooling water in the cooling water circuit pipeline according to the start-stop command output by the temperature control device.

[0010] Preferably, a plurality of the thermal resistors are provided;

[0011] The plurality of thermal resistors are arranged side by side on the cooling water circuit pipeline;

[0012] The plurality of thermal resistors are all connected to the input end of the temperature control device, and the temperature control device detects the operating states of the thermal resistors by comparing the temperature trends of the thermal resistors.

[0013] Preferably, the temperature control device includes: a control chip and a power supply module for supplying power to the control chip;

[0014] The control chip is electrically connected to the power supply module.

[0015] Preferably, the control chip includes: a temperature detection module, a first temperature processing module, a temperature setting module, and a second temperature processing module;

[0016] The thermal resistor is connected to the input end of the temperature detection module, and the temperature detection module receives the resistance signal input by the thermal resistor;

[0017] The first temperature processing module is respectively connected to the output end of the temperature detection module and the input end of the temperature setting module. The first temperature processing module performs temperature conversion on the resistance signal input by the temperature detection module and outputs the temperature value obtained after the temperature conversion to the temperature setting module;

[0018] The second temperature processing module is respectively connected to the heater and the output end of the temperature setting module. The temperature setting module compares the temperature value input by the temperature setting module with a preset temperature range and outputs the comparison result to the second temperature processing module. The second temperature processing module generates a start-stop command according to the comparison result and outputs the start-stop command to the heater.

[0019] Preferably, the control chip further includes a communication module connected to the output end of the first temperature processing module.

[0020] Preferably, the communication module is provided with an RS485 communication port.

[0021] Preferably, the control chip further includes a display module connected to the output end of the communication module.

[0022] Preferably, the number of the control chips is two. The two control chips are respectively used as a main chip and a backup chip, and the main chip and the backup chip can be automatically switched.

[0023] Preferably, the power supply module adopts a redundant power supply module, and the redundant power supply module is provided with two groups of electromagnetic compatibility circuits;

[0024] Each group of electromagnetic compatibility circuits includes a self - restoring fuse, an access filter, a first rectifier diode, a switching power supply chip, and a second rectifier diode connected in sequence;

[0025] The second rectifier diodes of the two groups of electromagnetic compatibility circuits are connected and then connected to a switching regulator.

[0026] Preferably, the thermal resistor is fixed on the cooling water circuit pipeline of the emergency diesel generator by means of threaded installation.

[0027] Implementing the present invention has the following beneficial effects:

[0028] The thermal resistor is installed on the cooling water circuit pipeline of the emergency diesel generator, and the temperature control device is installed in a non - vibration working condition far from the cooling water circuit pipeline; the thermal resistor is connected to the input end of the temperature control device, and the temperature control device performs temperature conversion on the resistance signal input by the thermal resistor and outputs a start - stop instruction according to the temperature value obtained after the temperature conversion; the heater is connected to the output end of the temperature control device, and the heater adjusts the temperature of the cooling water in the cooling water circuit pipeline according to the start - stop instruction output by the temperature control device. Since the output of the thermal resistor is a continuous resistance signal, and the temperature control device for logically processing the resistance signal output by the thermal resistor is located in a non - vibration working condition far from the cooling water pipeline, the temperature control device will not be affected by the vibration of the cooling water circuit pipeline during the process of outputting a start instruction to the heater, reducing the situation that the temperature detection instrument is prone to action setting value drift or abnormality due to mechanical deformation under vibration conditions, thereby improving the stability of the cooling water temperature control, and further improving the reliability of the emergency diesel generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0030] Figure 1It is a schematic structural diagram of the temperature control system for the cooling water of the emergency diesel generator of the present invention;

[0031] Figure 2 It is a schematic connection diagram of the temperature control device of the present invention;

[0032] Figure 3 It is a schematic connection diagram of the control chip of the present invention;

[0033] Figure 4 It is a schematic interface diagram of the display module of the present invention;

[0034] Figure 5 It is a schematic circuit diagram of the power supply module of the present invention. Detailed implementation manners

[0035] For a clearer understanding of the technical features, objectives, and effects of the present invention, the detailed implementation manners of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings, with a specific orientation structure and operation, and are only for the convenience of describing the technical solution, rather than indicating that the indicated device or element must have a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0036] It should also be noted that unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", "setting", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. When an element is referred to as being "above" or "below" another element, the element can be "directly" or "indirectly" located above the other element, or there may also be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the technical solution and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. However, those skilled in the art should clearly understand that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present invention.

[0038] The present invention provides a temperature control system for the cooling water of an emergency diesel generator, which is used to reduce the situation that the temperature detection instrument is prone to action setting drift or abnormality due to mechanical deformation under vibration conditions, thereby improving the stability of the cooling water temperature control, and further improving the reliability of the emergency diesel generator.

[0039] As Figure 1 shown, the temperature control system for the cooling water of the emergency diesel generator in the embodiment of the present invention includes: a thermal resistor 1, a heater 2, and a temperature control device 4; the thermal resistor 1 is installed on the cooling water circuit pipeline 3 of the emergency diesel generator, and the temperature control device 4 is installed in a non-vibration condition far from the cooling water circuit pipeline 3; the thermal resistor 1 is connected to the input end of the temperature control device 4, and the temperature control device 4 performs temperature conversion on the resistance signal input by the thermal resistor 1 and outputs a start-stop command according to the temperature value obtained after the temperature conversion; the heater 2 is connected to the output end of the temperature control device 4, and the heater 2 adjusts the temperature of the cooling water in the cooling water circuit pipeline 3 according to the start-stop command output by the temperature control device 4.

[0040] In this embodiment, the thermal resistor 1 is a temperature measuring instrument based on the resistance effect, which realizes temperature measurement according to the characteristic that the resistance value of a metal conductor changes with temperature. The thermal resistor 1 is installed on the cooling water circuit pipeline 3 to monitor the temperature of the cooling water in the cooling water circuit pipeline 3. When the temperature of the cooling water changes, the thermal resistor 1 outputs a corresponding changed resistance signal. In another implementable manner, a thermocouple can be used to replace the thermal resistor 1 to realize the temperature measurement of the cooling water, and specific selection can be made according to the actual usage cost requirements and temperature measurement range requirements, which are not limited here.

[0041] The temperature control device 4 is installed on a non-vibrating working condition away from the cooling water circuit pipe 3. The non-vibrating working condition is a load-bearing platform where there is no mechanical vibration or small mechanical vibration, and specifically can be the wall or the operating platform near the cooling water circuit pipe 3, which is not limited here. The temperature control device 4 is communicatively connected to the thermal resistor 1 through a signal cable. After receiving the resistance signal input by the thermal resistor 1, the temperature control device 4 first converts the resistance signal into a temperature value, and then performs logical processing on the temperature value according to the preset temperature range to output a start / stop command to the heater 2. For example: when the temperature value is less than the minimum value of the preset temperature range, the temperature control device 4 outputs a start command to instruct the heater 2 to start and heat the cooling water, so that the temperature of the cooling water rises to within the preset temperature range; when the temperature value is greater than the maximum value of the preset temperature range, the temperature control device 4 outputs a stop command to instruct the heater 2 to turn off and stop heating the cooling water, so that the temperature of the cooling water drops to within the preset temperature range, thereby keeping the temperature value of the cooling water always within the preset temperature range.

[0042] In some embodiments, as Figure 1 shown, a plurality of thermal resistors 1 are provided in the embodiments of the present invention; the plurality of thermal resistors 1 are arranged side by side on the cooling water circuit pipe 3; the plurality of thermal resistors 1 are all connected to the input end of the temperature control device 4, and the temperature control device 4 detects the operating state of each thermal resistor 1 by comparing the temperature trends of each thermal resistor 1.

[0043] Specifically, since there may be a gradient between the cooling water temperatures of different pipe segments in the same cooling water circuit pipe 3, especially in the case of long-distance transportation or large changes in the cooling water temperature. Therefore, in order to improve the accuracy of the cooling water temperature collected by the thermal resistor 1, a plurality of thermal resistors 1 can be arranged side by side on the cooling water circuit pipe 3. The multi-point measurement method can provide a more refined logical processing basis for the adjustment of the cooling water temperature, and by comparing the temperature data at different positions, it is easier to detect abnormal situations such as local overheating or cooling problems, so as to take timely measures. The temperature control device 4 can simultaneously obtain the resistance signals output by multiple thermal resistors 1, and perform temperature conversion on the obtained resistance signals to obtain the temperature values of each thermal resistor 1. Then, compare the temperature values of each thermal resistor 1 within the same time period, and determine the thermal resistor 1 with a temperature trend significantly different from that of other thermal resistors 1 as the faulty thermal resistor 1, so that the operating state of each thermal resistor 1 can be detected in real time, so as to intervene or process the faulty thermal resistor 1 in time. In another realizable manner, the average value of all temperature values of each thermal resistor 1 within the same time period can also be calculated, and the operating state of each thermal resistor 1 can be detected in real time by comparing the difference degrees of the average values of each thermal resistor 1.

[0044] In some embodiments, asFigure 2 As shown in the figure, the temperature control device 4 in the embodiment of the present invention includes: a control chip 41 and a power supply module 42 for supplying power to the control chip 41; the control chip 41 is electrically connected to the power supply module 42.

[0045] Specifically, the temperature control device 4 may include a control chip 41 and a power supply module 42. The power supply module 42 is used to supply power to the control chip 41, and the control chip 41 is used to implement the conversion and logical processing of temperature values. Among them, the control chip 41 may adopt a single-chip microcomputer, which is an integrated circuit chip. By using ultra-large scale integrated circuit technology, a central processing unit with data processing capabilities, a random access memory, a read-only memory, multiple input / output interfaces, an interrupt system, a timer / counter, and other functions are integrated onto a silicon chip to form a small and complete microcomputer system.

[0046] In some embodiments, as Figure 3 shown, the control chip 41 in the embodiment of the present invention includes: a temperature detection module 411, a first temperature processing module 412, a temperature setting module 413, and a second temperature processing module 414; the thermal resistor 1 is connected to the input end of the temperature detection module 411, and the temperature detection module 411 receives the resistance signal input by the thermal resistor 1; the first temperature processing module 412 is respectively connected to the output end of the temperature detection module 411 and the input end of the temperature setting module 413. The first temperature processing module converts the resistance signal input by the temperature detection module 411 into a temperature value and outputs the temperature value obtained after the temperature conversion to the temperature setting module 413; the second temperature processing module 414 is respectively connected to the heater 2 and the output end of the temperature setting module 413. The temperature setting module 413 compares the temperature value input by the temperature setting module 413 with a preset temperature range and outputs the comparison result to the second temperature processing module 414. The second temperature processing module 414 generates a start / stop instruction according to the comparison result and outputs the start / stop instruction to the heater 2.

[0047] Specifically, the temperature detection module 411, the first temperature processing module 412, the temperature setting module 413, and the second temperature processing module 414 are connected in sequence. The temperature detection module 411 is used to receive the resistance signal input by the thermal resistor 1 and transmit the resistance signal to the first temperature processing module 412. The first temperature processing module 412 is used to perform temperature conversion on the resistance signal input by the temperature detection module 411, that is, convert the resistance signal into a temperature value and transmit the converted temperature value to the temperature setting module 413. The temperature setting module 413 is used to set the high and low fixed values of a single channel, that is, first set a preset temperature range, which is the normal working condition temperature range of the cooling water (such as: 60°C - 65°C), and then compare the temperature value input by the first temperature processing module 412 with the preset temperature range. If the temperature value is less than the minimum value of the preset temperature range, the temperature setting module 413 outputs a low fixed value to the second temperature processing module 414; if the temperature value is greater than the maximum value of the preset temperature range, the temperature setting module 413 outputs a high fixed value to the second temperature processing module 414. The second temperature processing module 414 is used to generate a start-stop instruction based on the high fixed value or low fixed value input by the temperature setting module 413 and output the start-stop instruction to the heater 2 to instruct the heater 2 to start or stop. The start-stop instruction is a digital quantity signal that the heater 2 can recognize.

[0048] In some embodiments, as Figure 3 shown, the control chip 41 in the embodiment of the present invention further includes: a communication module 415 connected to the output end of the first temperature processing module 412.

[0049] Specifically, the communication module 415 can be set in the control chip 41. The communication module 415 is used to locally transmit or remotely transmit the temperature value converted by the first temperature processing module 412, so as to realize local display or remote display of the temperature value of the cooling water collected by the thermal resistor 1, which is convenient for the staff to observe in real time.

[0050] Among them, remote display can be realized by providing an RS485 communication port in the communication module 415. Specifically, RS485 is an electrical specification for multi-point differential data transmission. The RS485 communication port can perform multi-point two-way communication on a simple pair of twisted wires, and has characteristics such as good noise suppression ability, high data transmission rate, long transmission distance, and high reliability. The RS485 communication port in the communication module 415 can be communicatively connected to a distributed control system (DCS) through a signal cable to transmit the temperature value of the cooling water collected by the thermal resistor 1 to the DCS system, so that the staff can observe the temperature of the cooling water in real time through the configuration interface of the DCS system at a remote operator station or a central control room, realizing remote visualization of the cooling water temperature data.

[0051] In addition, local display can also be achieved through a display module 416 connected to the output end of the communication module 415. Specifically, as Figure 4 shown, the display module 416 can adopt a liquid crystal display (LCD) or a light emitting diode display (LED). Since the brightness of the LCD display will decrease significantly under the influence of strong light and its outdoor application degree is relatively low, while the LED display has high brightness and good color uniformity and can be widely used in a variety of different occasions, the LED display can be selected as the display module 416 in this embodiment to locally display the cooling water temperature value collected by the thermal resistor 1, facilitating the staff to extract, retrieve temperature data and set relevant data through the LED display. It should be noted that the specific selection of the display module 416 can be determined according to actual needs and is not limited here.

[0052] In some embodiments, as Figure 2 shown, the number of control chips 41 in the embodiment of the present invention is two. The two control chips 41 are respectively used as the main chip and the standby chip, and the main chip and the standby chip can be automatically switched.

[0053] Specifically, two identical control chips 41 can be set as the main chip and the standby chip that can be automatically switched to improve the reliability of the control chip 41. The structures and functions of the main chip and the standby chip are the same as those of the control chip 41 described in the foregoing embodiments and will not be elaborated here. When the main chip fails or malfunctions, the standby chip is automatically switched to perform logical processing on the resistance signal input by the thermal resistor 1, and the failure / abnormality information of the main chip can be displayed and an alarm signal can be issued on the local display module 416 or the remote operator station to prompt the staff to complete the fault repair in time.

[0054] In some embodiments, as Figure 5 shown, the power supply module 42 in the embodiment of the present invention adopts a redundant power supply module, and the redundant power supply module is provided with two groups of electromagnetic compatibility circuits 421; each group of electromagnetic compatibility circuits 421 includes a self - recovering fuse 4211, an access filter 4212, a first rectifier diode 4213, a switching power supply chip 4214, and a second rectifier diode 4215 connected in sequence; the second rectifier diodes 4215 of the two groups of electromagnetic compatibility circuits 421 are connected and then connected to the switching regulator 422.

[0055] Specifically, the power supply module 42 can adopt a redundant power supply module. When one of the power supplies in the redundant power supply module fails, the other power supply can take over its work to improve the reliability of the power supply module 42. The redundant power supply module is provided with two groups of electromagnetic compatibility (EMC) circuits 421. EMC refers to the ability of a device or system to operate in compliance with requirements in its electromagnetic environment and not generate intolerable electromagnetic interference to any device in its environment. The EMC circuit 421 of the redundant power supply module is based on a switching power supply chip 4214, which can adopt a DC voltage - DC voltage (DC / DC) conversion module for converting the magnitude of DC voltage. For example, a boost - type DC / DC conversion module or a buck - type DC / DC conversion module. The live wire sequentially passes through a self - resetting fuse 4211, an access filter 4212, and a first rectifier diode 4213 and then enters the switching power supply chip 4214. The DC output terminals of the switching power supply chips 4214 of the two different EMC circuits are connected to each other after passing through a second rectifier diode 4215, and after being connected to each other, they enter a switching regulator 422 to enhance the reliability of the electromagnetic compatibility performance.

[0056] In some embodiments, as Figure 1 shown, the thermal resistor 1 in the embodiment of the present invention is fixed to the cooling water circuit pipeline 3 of the emergency diesel generator by means of threaded installation.

[0057] Specifically, since the thermal resistor 1 is light in weight and can be installed and fixed by its own thread, there is no need to install other special fixing brackets, thus reducing the installation cost.

[0058] It can be understood that the above - mentioned embodiments only represent the preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above - mentioned technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention should fall within the scope covered by the claims of the present invention.

Claims

1. A temperature control system for cooling water of an emergency diesel generator, characterized in that: include: Thermal resistors, heaters and temperature control devices; The thermal resistor is installed on the cooling water loop pipeline of the emergency diesel generator, and the temperature control device is installed on a non-vibrating working condition away from the cooling water loop pipeline; The thermal resistor is connected to the input end of the temperature control device, and the temperature control device performs temperature conversion on the resistance signal input by the thermal resistor and outputs a start-stop instruction according to the temperature value obtained after the temperature conversion; The heater is connected to the output end of the temperature control device, and the heater adjusts the cooling water temperature in the cooling water loop pipeline according to the start / stop instruction output by the temperature control device.

2. The temperature control system of cooling water of an emergency diesel generator according to claim 1, characterized in that: The thermal resistors are provided in a plurality; A plurality of thermal resistors are installed side by side on the cooling water loop pipeline; A plurality of thermal resistors are connected to the input end of the temperature control device, and the temperature control device detects the operating status of each thermal resistor by comparing the temperature trends of each thermal resistor.

3. The temperature control system of cooling water of the emergency diesel generator according to claim 1, characterized in that: The temperature control device comprises: a control chip and a power module for supplying power to the control chip; The control chip is electrically connected to the power module.

4. The temperature control system of cooling water of an emergency diesel generator according to claim 3, characterized in that: The control chip includes: a temperature detection module, a first temperature processing module, a temperature setting module, and a second temperature processing module; The thermal resistor is connected to the input end of the temperature detection module, and the temperature detection module receives the resistance signal input by the thermal resistor; The first temperature processing module is connected to the output end of the temperature detection module and the input end of the temperature setting module respectively, and the first temperature processing module performs temperature conversion on the resistance signal input by the temperature detection module and outputs the temperature value obtained after the temperature conversion to the temperature setting module; The second temperature processing module is connected to the output end of the heater and the temperature setting module respectively. The temperature setting module compares the temperature value input by the temperature setting module with the preset temperature range and outputs the comparison result to the second temperature processing module. The second temperature processing module generates a start-stop instruction according to the comparison result and outputs the start-stop instruction to the heater.

5. The temperature control system of cooling water of an emergency diesel generator according to claim 4, characterized in that: The control chip further includes: a communication module connected to the output end of the first temperature processing module.

6. The temperature control system of cooling water of an emergency diesel generator according to claim 5, characterized in that: The communication module is provided with an RS485 communication port.

7. The temperature control system of cooling water of an emergency diesel generator according to claim 4, characterized in that: The control chip further includes: a display module connected to the output end of the communication module.

8. The temperature control system of cooling water of an emergency diesel generator according to claim 3, characterized in that: The number of the control chips is two, and the two control chips serve as a main chip and a backup chip respectively, and the main chip and the backup chip can be switched automatically.

9. The temperature control system for cooling water of an emergency diesel generator according to any one of claims 1 to 8, characterized in that: The power supply module adopts a redundant power supply module, and the redundant power supply module is provided with two sets of electromagnetic compatibility circuits; Each set of electromagnetic compatibility circuits includes a self-recovery fuse, an access filter, a first rectifier diode, a switching power supply chip and a second rectifier diode connected in sequence; The two groups of second rectifier diodes of the electromagnetic compatibility circuit are connected to the switching regulator.

10. The temperature control system for cooling water of an emergency diesel generator according to any one of claims 1 to 8, characterized in that: The thermal resistor is fixed on the cooling water loop pipeline of the emergency diesel generator by threaded installation.

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