A pump motor cooling system applied to high temperature environment

Abstract

The utility model relates to a kind of pump motor cooling systems applied to high-temperature environment, including first temperature sensor, first schmitt trigger, signal amplifier, low level trigger switch and high level trigger switch;The output end of first temperature sensor is electrically connected with the input end of first schmitt trigger, the output end of first schmitt trigger is electrically connected with the input end of signal amplifier, the output end of signal amplifier is electrically connected with the control end of low level trigger switch and the control end of high level trigger switch respectively;Low level trigger switch controls the start-stop of air-cooled motor, and high level trigger switch controls the start-stop of water-cooled motor;The utility model can select air-cooled mode or water-cooled mode according to the temperature of the shell of pump motor, reduce energy waste.

Description

Technical Field

[0001] This utility model relates to the field of water pump control circuit technology, specifically to a pump motor cooling system applied in high-temperature environments. Background Technology

[0002] When a water pump operates in a high-temperature environment, a water cooling system is usually used to cool the pump motor; however, when the ambient temperature varies greatly, air cooling is sufficient for the pump motor, and water cooling is not necessary.

[0003] In the existing technology, water pumps usually control the water supply of the water cooling system of the motor according to the temperature of the pump motor casing in order to achieve the cooling function of the pump motor in high-temperature environments. However, when the ambient temperature of the pump motor using the water cooling system varies greatly, and the ambient temperature is low, the traditional air cooling system can meet the cooling requirements. If the water cooling system is still used for cooling, the energy consumed by the water cooling system is higher than that of the air cooling system, which will result in energy waste. Utility Model Content

[0004] To address the energy waste caused by using only a water-cooling system to cool water pumps in situations with significant temperature variations in existing technologies, this invention provides a pump motor cooling system applicable to high-temperature environments.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A pump motor cooling system for use in high-temperature environments includes a first temperature sensor, a first Schmitt trigger, a signal amplifier, a low-level trigger switch, and a high-level trigger switch.

[0007] The output terminal of the first temperature sensor is electrically connected to the input terminal of the first Schmitt trigger, the output terminal of the first Schmitt trigger is electrically connected to the input terminal of the signal amplifier, and the output terminal of the signal amplifier is electrically connected to the control terminal of the low-level trigger switch and the control terminal of the high-level trigger switch, respectively; wherein, the first temperature sensor is disposed on the housing of the pump motor, and the first temperature sensor is used to collect the housing temperature of the pump motor;

[0008] The power input terminals of the low-level trigger switch and the high-level trigger switch are connected to a first power supply. The power input terminals of the low-level trigger switch and the high-level trigger switch are both connected to a second power supply. The power output terminal of the low-level trigger switch is electrically connected to the power supply terminal of the air-cooled motor, and the power output terminal of the high-level trigger switch is electrically connected to the power supply terminal of the water-cooled motor.

[0009] The beneficial effects of this invention are as follows: A first temperature sensor collects the temperature of the pump motor housing and outputs a first temperature voltage. This first temperature voltage is input to a first Schmitt trigger and filtered. When the temperature of the pump motor housing is lower than a preset temperature, the first temperature voltage is lower than a preset voltage threshold. The first Schmitt trigger outputs a low-level signal, turning on the low-level trigger switch and turning off the high-level trigger switch. The air-cooled motor is powered on and runs, while the water-cooled motor is powered off and stops, and the system enters air-cooling mode. When the temperature of the pump motor housing is higher than or equal to the preset temperature, the first temperature voltage is higher than or equal to the preset voltage threshold. The first Schmitt trigger outputs a high-level signal, turning off the low-level trigger switch and turning on the high-level trigger switch. The air-cooled motor is powered off and stops, while the water-cooled motor is powered on and runs, and the system enters water-cooling mode. This invention can select between air-cooling and water-cooling modes based on the temperature of the pump motor housing. When the pump motor housing temperature is too high, it can automatically switch from air-cooling to water-cooling mode; when the pump motor housing temperature is too low, it can automatically switch from water-cooling to air-cooling mode, reducing energy waste.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, it also includes a second temperature sensor, a second Schmitt trigger, and an OR gate;

[0012] The output terminal of the second temperature sensor is electrically connected to the input terminal of the second Schmitt trigger, the output terminal of the second Schmitt trigger is electrically connected to one input terminal of the OR gate, the output terminal of the first Schmitt trigger is electrically connected to the other input terminal of the OR gate, and the output terminal of the OR gate is electrically connected to the control terminal of the low-level trigger switch and the control terminal of the high-level trigger switch, respectively; wherein, the second temperature sensor is used to collect the ambient temperature of the pump motor.

[0013] The beneficial effect of adopting the above-mentioned further solution is that by setting a second temperature sensor, a second Schmitt trigger, and an OR gate; and by using the second temperature sensor to collect the ambient temperature of the pump motor; when the ambient temperature reaches a preset ambient temperature threshold, the second Schmitt trigger outputs a high-level signal, the OR gate outputs a high-level signal, and the high-level trigger switch is turned on, and the system enters the water cooling mode; therefore, by setting a second temperature sensor, a second Schmitt trigger, and an OR gate, the cooling mode of the pump motor can be automatically switched according to the ambient temperature and the housing temperature of the pump motor, preventing the poor air cooling effect caused by excessively high ambient temperature.

[0014] Furthermore, it also includes a filtering module, which includes a first capacitor and a second capacitor. One end of the first capacitor and the second capacitor are electrically connected to the power input terminal of the low-level trigger switch and the power input terminal of the high-level trigger switch, and the other end of the first capacitor and the second capacitor are grounded.

[0015] The beneficial effect of adopting the above-mentioned further solution is that by setting a filtering module, noise from the power input terminal of the low-level trigger switch and the power input terminal of the high-level trigger switch can be filtered out, thereby improving the power supply stability of the low-level trigger switch and the high-level trigger switch.

[0016] Furthermore, it also includes an emergency stop switch, one end of which is connected to the second power supply, and the other end of which is electrically connected to the power supply input terminal of the low-level trigger switch and the power supply input terminal of the high-level trigger switch, respectively.

[0017] The beneficial effect of adopting the above-mentioned further solution is that, by setting an emergency stop switch, the power supply to the air-cooled motor and the water-cooled motor can be cut off in an emergency by pressing the emergency stop switch, thereby improving the operational safety of the air-cooled motor and the water-cooled motor.

[0018] Furthermore, it also includes a manual enable switch, one end of which is connected to the first power supply, and the other end of which is electrically connected to the control terminal of the high-level trigger switch.

[0019] The beneficial effect of adopting the above-mentioned further solution is that, by setting a manual enable switch, when the manual enable switch is turned on, the control terminal of the high-level trigger switch can be forcibly pulled high to a high level, so as to force the high-level trigger switch to turn on and force the system to switch to water-cooling mode.

[0020] Furthermore, the low-level trigger switch includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a transistor, a first MOSFET, and a first relay;

[0021] One end of the first resistor is electrically connected to the output terminal of the signal amplifier. The other end of the first resistor is electrically connected to one end of the second resistor and the base of the transistor. The other end of the second resistor and the emitter of the transistor are both grounded. The collector of the transistor is electrically connected to one end of the third resistor, the gate of the first MOSFET, and one end of the fourth resistor. The other end of the third resistor and the drain of the first MOSFET are both connected to the first power supply. The source of the first MOSFET is electrically connected to one end of the electromagnetic coil of the first relay. The other end of the electromagnetic coil of the first relay is electrically connected to one end of the fifth resistor. The other ends of the fourth resistor and the fifth resistor are both grounded. One end of the normally open contact of the first relay is connected to the second power supply. The other end of the normally open contact of the first relay is electrically connected to the positive terminal of the power supply terminal of the air-cooled motor. The negative terminal of the power supply terminal of the air-cooled motor is grounded.

[0022] The beneficial effect of adopting the above-mentioned further solution is that a low-level trigger switch is formed by combining a transistor, a first MOSFET, and a relay. When the low-level trigger switch is triggered at a low level, the first MOSFET is turned on, the electromagnetic coil of the first relay is energized and magnetized, the normally open contact of the first relay is closed, and the air-cooled motor is energized and works.

[0023] Furthermore, the low-level trigger switch also includes a first light-emitting diode, the positive terminal of which is electrically connected to the gate of the first MOS transistor, and the negative terminal of which is grounded.

[0024] The advantage of adopting the above-mentioned further solution is that by setting a first light-emitting diode, after the low-level trigger switch is turned on, the first light-emitting diode is powered on and illuminates, making it easy to know that the system is in air-cooled mode.

[0025] Furthermore, the high-level trigger switch includes a second MOSFET, a second relay, and a sixth resistor;

[0026] The gate of the second MOSFET is electrically connected to the output terminal of the signal amplifier. The drain of the second MOSFET is connected to the first power supply. The source of the second MOSFET is electrically connected to one end of the electromagnetic coil of the second relay. The other end of the electromagnetic coil of the second relay is electrically connected to one end of the sixth resistor. The other end of the sixth resistor is grounded. One end of the normally open contact of the second relay is connected to the second power supply. The other end of the normally open contact of the second relay is electrically connected to the positive terminal of the power supply terminal of the water-cooled motor. The negative terminal of the power supply terminal of the water-cooled motor is grounded.

[0027] The beneficial effect of adopting the above-mentioned further solution is that by combining the second MOSFET with the relay to form a high-level trigger switch, when the high-level trigger switch is triggered by a high level, the second MOSFET is turned on, the electromagnetic coil of the second relay is energized and magnetized, the normally open contact of the second relay is closed, and the water-cooled motor is energized and works.

[0028] Furthermore, the high-level trigger switch also includes a second light-emitting diode, the positive terminal of which is electrically connected to the source of the second MOS transistor, and the negative terminal of which is grounded.

[0029] The advantage of adopting the above-mentioned further solution is that by setting a second light-emitting diode, after the high-level trigger switch is turned on, the second light-emitting diode is powered on and illuminates, making it easy to know that the system is in water-cooling mode.

[0030] Furthermore, the signal amplifier includes an operational amplifier, a seventh resistor, and an eighth resistor; the non-inverting input of the operational amplifier is electrically connected to the output of the first Schmitt trigger, the output of the operational amplifier is electrically connected to one end of the seventh resistor, the other end of the seventh resistor is electrically connected to one end of the eighth resistor, the other end of the eighth resistor is grounded, the inverting input of the operational amplifier is electrically connected to one end of the eighth resistor, and the output of the operational amplifier is electrically connected to the control terminals of the low-level trigger switch and the high-level trigger switch, respectively.

[0031] The beneficial effect of this utility model is that by forming an in-phase amplifier consisting of an operational amplifier, a seventh resistor, and an eighth resistor, the voltage output by the first Schmitt trigger is amplified in-phase to improve the enable driving force. Attached Figure Description

[0032] Figure 1 This is a circuit block diagram of one embodiment of the present utility model;

[0033] Figure 2 This is another circuit principle block diagram in an embodiment of the present utility model;

[0034] Figure 3 This is a circuit diagram of the signal amplifier in an embodiment of the present invention.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. First temperature sensor; 2. First Schmitt trigger; 3. Signal amplifier; 4. Low-level trigger switch; 5. High-level trigger switch; 6. Filtering module; 7. Second temperature sensor; 8. Second Schmitt trigger; 9. OR gate. Detailed Implementation

[0037] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0038] like Figure 1 As shown, this embodiment provides a pump motor cooling system for use in high-temperature environments, including a first temperature sensor 1, a first Schmitt trigger 2, a signal amplifier 3, a low-level trigger switch 4, and a high-level trigger switch 5;

[0039] The output terminal of the first temperature sensor 1 is electrically connected to the input terminal of the first Schmitt trigger 2. The output terminal of the first Schmitt trigger 2 is electrically connected to the input terminal of the signal amplifier 3. The output terminal of the signal amplifier 3 is electrically connected to the control terminal of the low-level trigger switch 4 and the control terminal of the high-level trigger switch 5, respectively. The first temperature sensor 1 is located on the housing of the pump motor and is used to collect the housing temperature of the pump motor.

[0040] The power input terminals of the low-level trigger switch 4 and the high-level trigger switch 5 are connected to the first power supply. The power input terminals of the low-level trigger switch 4 and the high-level trigger switch 5 are both connected to the second power supply. The power output terminal of the low-level trigger switch 4 is electrically connected to the power supply terminal of the air-cooled motor M1, and the power output terminal of the high-level trigger switch 5 is electrically connected to the power supply terminal of the water-cooled motor M2.

[0041] In this embodiment of the invention, the temperature of the pump motor housing is collected by the first temperature sensor 1, and a first temperature voltage is output. After the first temperature voltage is input to the first Schmitt trigger 2, it is filtered by the first Schmitt trigger 2. When the temperature of the pump motor housing is lower than the preset temperature, the first temperature voltage is lower than the first voltage preset threshold. The first Schmitt trigger 2 outputs a low-level signal, the low-level trigger switch 4 is turned on, and the high-level trigger switch 5 is turned off. The air-cooled motor M1 is powered on and runs, and the water-cooled motor M2 is powered off and stops running. The system enters the air-cooling mode. When the temperature of the pump motor housing is higher than or equal to the preset temperature, the first temperature voltage is higher than or equal to the first voltage preset threshold. The first Schmitt trigger 2 outputs a high-level signal, the low-level trigger switch 4 is turned off, and the high-level trigger switch 5 is turned on. The air-cooled motor M1 is powered off and stops running, and the water-cooled motor M2 is powered on and runs. The system enters the water-cooling mode. This invention can select between air-cooled and water-cooled modes based on the temperature of the pump motor housing. When the pump motor housing temperature is too high, it can automatically switch from air-cooled to water-cooled mode, and when the pump motor housing temperature is low, it can automatically switch from water-cooled to air-cooled mode, thus reducing energy waste.

[0042] like Figure 2As shown, in some embodiments, the cooling system further includes a second temperature sensor 7, a second Schmitt trigger 8, and an OR gate 9; both the first temperature sensor 1 and the second temperature sensor 7 are voltage-type temperature sensors.

[0043] The output of the second temperature sensor 7 is electrically connected to the input of the second Schmitt trigger 8. The output of the second Schmitt trigger 8 is electrically connected to one input of the OR gate 9. The output of the first Schmitt trigger 2 is electrically connected to the other input of the OR gate 9. The output of the OR gate 9 is electrically connected to the control terminal of the low-level trigger switch 4 and the control terminal of the high-level trigger switch 5, respectively. The second temperature sensor 7 is used to collect the ambient temperature of the pump motor.

[0044] This embodiment of the invention uses a second temperature sensor 7, a second Schmitt trigger 8, and an OR gate 9. The second temperature sensor 7 is used to collect the ambient temperature of the pump motor. When the ambient temperature reaches a preset ambient temperature threshold, the second Schmitt trigger 8 outputs a high-level signal, the OR gate 9 outputs a high-level signal, and the high-level trigger switch 5 is turned on, and the system enters the water cooling mode. Therefore, by using the second temperature sensor 7, the second Schmitt trigger 8, and the OR gate 9, the cooling mode of the pump motor can be automatically switched according to the ambient temperature and the housing temperature of the pump motor, preventing poor air cooling effect caused by excessively high ambient temperature.

[0045] like Figure 3 As shown, in some embodiments, the signal amplifier 3 includes an operational amplifier U1, a seventh resistor R7, and an eighth resistor R8. The non-inverting input of the operational amplifier U1 is electrically connected to the output of the OR gate 9. The output of the operational amplifier U1 is electrically connected to one end of the seventh resistor R7, and the other end of the seventh resistor R7 is electrically connected to one end of the eighth resistor R8, which is grounded. The inverting input of the operational amplifier U1 is electrically connected to one end of the eighth resistor R8. The output of the operational amplifier U1 is electrically connected to the control terminals of the low-level trigger switch 4 and the high-level trigger switch 5, respectively. By forming a non-inverting amplifier with the operational amplifier U1, the seventh resistor R7, and the eighth resistor R8, the voltage output of the first Schmitt trigger is amplified in phase to improve the enable driving force. The amplification formula of the signal amplifier 3 is as follows:

[0046] Vout = 1 + R7 / R8Vin; where Vout represents the output voltage of signal amplifier 3, Vin represents the output voltage of OR gate 9, R7 represents the resistance value of the seventh resistor R7, R8 represents the resistance value of the eighth resistor R8, and R7 / R8 represents the ratio of the resistance value of the seventh resistor R7 to the resistance value of the eighth resistor R8. Therefore, the amplification factor of signal amplifier 3 can be adjusted by adjusting the resistance values ​​of the seventh resistor R7 and the eighth resistor R8.

[0047] In some embodiments, the low-level trigger switch 4 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a transistor Q1, a first MOSFET Q2, and a first relay K1.

[0048] One end of the first resistor R1 is electrically connected to the output terminal of the operational amplifier U1. The other end of the first resistor R1 is electrically connected to one end of the second resistor R2 and the base of the transistor Q1. The other end of the second resistor R2 and the emitter of the transistor Q1 are both grounded. The collector of the transistor Q1 is electrically connected to one end of the third resistor R3, the gate of the first MOSFET Q2, and one end of the fourth resistor R4. The drain of the first MOSFET Q2 is electrically connected to the other end of the third resistor R3. The other end of the third resistor R3 is connected to the first power supply. The source of the first MOSFET Q2 is electrically connected to one end of the electromagnetic coil of the first relay K1. The other end of the electromagnetic coil of the first relay K1 is electrically connected to one end of the fifth resistor R5. The other ends of the fourth resistor R4 and the other ends of the fifth resistor R5 are both grounded. One end of the normally open contact of the first relay K1 is connected to the second power supply. The other end of the normally open contact of the first relay K1 is electrically connected to the positive terminal of the power supply terminal of the air-cooled motor M1. The negative terminal of the power supply terminal of the air-cooled motor M1 is grounded.

[0049] When the base of transistor Q1 is at a low voltage level, transistor Q1 is cut off. The gate voltage of the first MOSFET Q2 is the voltage divided across the fourth resistor R4, so the gate of the first MOSFET Q2 is at a high level, and Q2 is turned on, energizing the electromagnetic coil of the first relay K1. When the base of transistor Q1 is at a high voltage level, transistor Q1 is turned on, and the gate of the first MOSFET Q2 is grounded through transistor Q1, so the gate of the first MOSFET Q2 is at a low level, and Q2 is cut off, de-energizing the electromagnetic coil of the first relay K1. Transistor Q1, the first MOSFET Q2, and the relay form a low-level trigger switch. When the low-level trigger switch is activated, the first MOSFET Q2 is turned on, the electromagnetic coil of the first relay K1 is energized, the normally open contact of the first relay K1 is closed, and the air-cooled motor M1 is powered on and operates.

[0050] In some embodiments, the low-level trigger switch 4 further includes a first light-emitting diode (LED) D1. The anode of the first LED D1 is electrically connected to the gate of the first MOSFET Q2, and the cathode of the first LED D1 is grounded. In practical applications, the first LED D1 can be selected as an LED that emits green light. By setting the first LED D1, after the low-level trigger switch 4 is triggered and turned on, the first LED D1 is energized and emits green light. The operation of the green LED indicates that the system is in air-cooled mode.

[0051] In some embodiments, the high-level trigger switch 5 includes a second MOSFET Q3, a second relay K2, and a sixth resistor R6. The gate of the second MOSFET Q3 is electrically connected to the output terminal of the signal amplifier 3. The drain of the second MOSFET Q3 is connected to the other end of the third resistor R3, which is connected to a first power supply. The source of the second MOSFET Q3 is electrically connected to one end of the electromagnetic coil of the second relay K2. The other end of the electromagnetic coil of the second relay K2 is electrically connected to one end of the sixth resistor R6, which is grounded. One end of the normally open contact of the second relay K2 is connected to a second power supply, and the other end of the normally open contact of the second relay K2 is electrically connected to the positive terminal of the power supply terminal of the water-cooled motor M2. The negative terminal of the power supply terminal of the water-cooled motor M2 is grounded. After the OR gate 9 outputs a high-level signal, it is amplified by the signal amplifier 3. The gate of the second MOSFET Q3 is at a high-level potential, the second MOSFET Q3 is turned on, the electromagnetic coil of the second relay K2 is energized, and the water-cooled motor M2 is powered on and operates. After the OR gate 9 outputs a low-level signal, it is amplified by the signal amplifier 3. The gate of the second MOSFET Q3 is still at a low-level potential, the second MOSFET Q3 is cut off, the electromagnetic coil of the second relay K2 is de-energized, and the water-cooled motor M2 stops working.

[0052] The second MOSFET Q3 is combined with a relay to form a high-level trigger switch. When the high-level trigger switch is triggered at a high level, the second MOSFET Q3 is turned on, the electromagnetic coil of the second relay K2 is energized and magnetized, the normally open contact of the second relay K2 is closed, and the water-cooled motor M2 is energized and works.

[0053] In some embodiments, the high-level trigger switch 5 further includes a second light-emitting diode (LED) D2. The anode of the second LED D2 is electrically connected to the source of the second MOSFET Q3, and the cathode of the second LED D2 is grounded. In specific applications, the second LED D2 can be configured to emit red light; when the second LED D2 is energized, it emits red light. By configuring the second LED D2 so that it emits red light after the high-level trigger switch 5 is activated, the system is in water-cooling mode.

[0054] In some embodiments, the cooling system further includes a filter module 6, which includes a first capacitor C1 and a second capacitor C2. One end of the first capacitor C1 and the second capacitor C2 is electrically connected to the other end of the third resistor R3, and the other end of the first capacitor C1 and the second capacitor C2 is grounded.

[0055] By setting up the filter module 6, noise from the power input terminals of the low-level trigger switch 4 and the high-level trigger switch 5 can be filtered out, thereby improving the power supply stability of the low-level trigger switch 4 and the high-level trigger switch 5.

[0056] In some other embodiments, an emergency stop switch S1 is also included. One end of the emergency stop switch S1 is connected to a second power supply, and the other end of the emergency stop switch S1 is electrically connected to the power supply input terminal of the low-level trigger switch 4 and the power supply input terminal of the high-level trigger switch 5, respectively.

[0057] By setting an emergency stop switch S1, the power supply to the air-cooled motor M1 and the water-cooled motor M2 can be cut off in an emergency by pressing the emergency stop switch S1, thereby improving the operational safety of the air-cooled motor M1 and the water-cooled motor M2.

[0058] In some other embodiments, a manual enable switch S2 is also included. One end of the manual enable switch S2 is connected to the other end of the third resistor R3, and the other end of the manual enable switch S2 is electrically connected to one end of the first resistor R1 and the gate of the second MOSFET Q3. When the manual enable switch S2 is turned on, the output voltage of the first power supply is directly connected to the gate of the second MOSFET Q3 and the base of the transistor Q1. Therefore, transistor Q1 is turned on, the gate of the first MOSFET Q1 is turned off due to being grounded and at a low potential, and the second MOSFET Q3 is turned on. This forces the water-cooled motor M2 to power on and operate.

[0059] By setting the manual enable switch S2, when the manual enable switch S2 is turned on, the control terminal of the high-level trigger switch 5 can be forcibly pulled high to a high level, forcibly turning on the high-level trigger switch 5, thereby forcing the system to switch to water-cooling mode.

[0060] In some other embodiments, the first power supply is a 12V DC power supply, and the second power supply is a 24V to 48V DC power supply; both the 12V DC power supply and the 24V to 48V DC power supply can be provided using existing power modules or transformers.

[0061] In some embodiments, the pump motor is primarily cooled by an air-cooling device and a water-cooling device. The air-cooling device uses a cooling fan controlled by an air-cooled motor M1 to blow air onto the pump motor housing. The water-cooling device uses a water-cooled motor M2 to drive a cooling water pump, which allows coolant to flow sequentially from a cooling storage tank over the surface of the pump motor housing. Finally, the coolant flowing over the pump motor housing is collected in the cooling storage tank, thus achieving water cooling of the pump motor. It should be noted that air cooling and water cooling of motors are common knowledge in the art and will not be described in detail in this embodiment.

[0062] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the concept and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pump motor cooling system for use in high-temperature environments, characterized in that: It includes a first temperature sensor (1), a first Schmitt trigger (2), a signal amplifier (3), a low-level trigger switch (4), and a high-level trigger switch (5); The output terminal of the first temperature sensor (1) is electrically connected to the input terminal of the first Schmitt trigger (2), the output terminal of the first Schmitt trigger (2) is electrically connected to the input terminal of the signal amplifier (3), and the output terminal of the signal amplifier (3) is electrically connected to the control terminal of the low-level trigger switch (4) and the control terminal of the high-level trigger switch (5), respectively; wherein, the first temperature sensor (1) is disposed on the housing of the pump motor, and the first temperature sensor (1) is used to collect the housing temperature of the pump motor; The power input terminal of the low-level trigger switch (4) and the power input terminal of the high-level trigger switch (5) are connected to the first power supply. The power input terminal of the low-level trigger switch (4) and the power input terminal of the high-level trigger switch (5) are both connected to the second power supply. The power output terminal of the low-level trigger switch (4) is electrically connected to the power supply terminal of the air-cooled motor (M1), and the power output terminal of the high-level trigger switch (5) is electrically connected to the power supply terminal of the water-cooled motor (M2).

2. The pump motor cooling system for high-temperature environments according to claim 1, characterized in that: It also includes a second temperature sensor (7), a second Schmitt trigger (8), and an OR gate (9); The output terminal of the second temperature sensor (7) is electrically connected to the input terminal of the second Schmitt trigger (8), the output terminal of the second Schmitt trigger (8) is electrically connected to one input terminal of the OR gate (9), the output terminal of the first Schmitt trigger (2) is electrically connected to the other input terminal of the OR gate (9), and the output terminal of the OR gate (9) is electrically connected to the control terminal of the low-level trigger switch (4) and the control terminal of the high-level trigger switch (5), respectively; wherein, the second temperature sensor (7) is used to collect the ambient temperature of the pump motor.

3. The pump motor cooling system for high-temperature environments according to claim 1, characterized in that: It also includes a filtering module (6), which includes a first capacitor (C1) and a second capacitor (C2). One end of the first capacitor (C1) and the second capacitor (C2) are electrically connected to the power input terminal of the low-level trigger switch (4) and the power input terminal of the high-level trigger switch (5), and the other end of the first capacitor (C1) and the second capacitor (C2) is grounded.

4. The pump motor cooling system for high-temperature environments according to claim 1, characterized in that: It also includes an emergency stop switch (S1), one end of which is connected to the second power supply, and the other end of which is electrically connected to the power supply input terminal of the low-level trigger switch (4) and the power supply input terminal of the high-level trigger switch (5).

5. The pump motor cooling system for high-temperature environments according to claim 1, characterized in that: It also includes a manual enable switch (S2), one end of which is connected to the first power supply, and the other end of which is electrically connected to the control terminal of the high-level trigger switch (5).

6. The pump motor cooling system for high-temperature environments according to claim 1, characterized in that: The low-level trigger switch (4) includes a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), a transistor (Q1), a first MOSFET (Q2), and a first relay (K1); One end of the first resistor (R1) is electrically connected to the output terminal of the signal amplifier (3), and the other end of the first resistor (R1) is electrically connected to one end of the second resistor (R2) and the base of the transistor (Q1). The other end of the second resistor (R2) and the emitter of the transistor (Q1) are both grounded. The collector of the transistor (Q1) is electrically connected to one end of the third resistor (R3), the gate of the first MOS transistor (Q2), and one end of the fourth resistor (R4). The other end of the third resistor (R3) and the drain of the first MOS transistor (Q2) are both connected to the ground. In the first power supply, the source of the first MOSFET (Q2) is electrically connected to one end of the electromagnetic coil of the first relay (K1), and the other end of the electromagnetic coil of the first relay (K1) is electrically connected to one end of the fifth resistor (R5). The other ends of the fourth resistor (R4) and the fifth resistor (R5) are both grounded. One end of the normally open contact of the first relay (K1) is connected to the second power supply, and the other end of the normally open contact of the first relay (K1) is electrically connected to the positive terminal of the power supply of the air-cooled motor (M1). The negative terminal of the power supply of the air-cooled motor (M1) is grounded.

7. The pump motor cooling system for high-temperature environments according to claim 6, characterized in that: The low-level trigger switch (4) further includes a first light-emitting diode (D1), the positive terminal of the first light-emitting diode (D1) is electrically connected to the gate of the first MOS transistor (Q2), and the negative terminal of the first light-emitting diode (D1) is grounded.

8. The pump motor cooling system for high-temperature environments according to claim 1, characterized in that: The high-level trigger switch (5) includes a second MOSFET (Q3), a second relay (K2), and a sixth resistor (R6); The gate of the second MOS transistor (Q3) is electrically connected to the output terminal of the signal amplifier (3). The drain of the second MOS transistor (Q3) is connected to the first power supply. The source of the second MOS transistor (Q3) is electrically connected to one end of the electromagnetic coil of the second relay (K2). The other end of the electromagnetic coil of the second relay (K2) is electrically connected to one end of the sixth resistor (R6). The other end of the sixth resistor (R6) is grounded. One end of the normally open contact of the second relay (K2) is connected to the second power supply. The other end of the normally open contact of the second relay (K2) is electrically connected to the positive terminal of the power supply terminal of the water-cooled motor (M2). The negative terminal of the power supply terminal of the water-cooled motor (M2) is grounded.

9. The pump motor cooling system for high-temperature environments according to claim 8, characterized in that: The high-level trigger switch (5) further includes a second light-emitting diode (D2), the positive terminal of the second light-emitting diode (D2) is electrically connected to the source of the second MOS transistor (Q3), and the negative terminal of the second light-emitting diode (D2) is grounded.

10. The pump motor cooling system for high-temperature environments according to claim 1, characterized in that: The signal amplifier (3) includes an operational amplifier (U1), a seventh resistor (R7), and an eighth resistor (R8); the non-inverting input of the operational amplifier (U1) is electrically connected to the output of the first Schmitt trigger (2), the output of the operational amplifier (U1) is electrically connected to one end of the seventh resistor (R7), the other end of the seventh resistor (R7) is electrically connected to one end of the eighth resistor (R8), the other end of the eighth resistor (R8) is grounded, the inverting input of the operational amplifier (U1) is electrically connected to one end of the eighth resistor (R8), and the output of the operational amplifier (U1) is electrically connected to the control terminal of the low-level trigger switch (4) and the control terminal of the high-level trigger switch (5).

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