TWI840181B - Fluid pump linear control system and method thereof - Google Patents

Abstract

The present invention is a fluid pump control system, comprising: a microprocessor, located on a circuit board; a plurality of temperature sensors or a plurality of pressure sensors; and a frequency converter control module, one end of the frequency converter control module is electrically connected to the microprocessor, one end of the frequency converter control module is electrically connected to at least one frequency converter, and the at least one frequency converter is electrically connected to at least one fluid pump; wherein the microprocessor has a structure of an energy-saving protection module, including: a constant temperature module, a constant pressure module, a differential temperature module, and a differential pressure module, to control the fluid pump to perform energy-saving protection under constant temperature, constant pressure, differential temperature, and differential pressure states.

Description

Linear control system and method for fluid pump

A control system, in particular a linear control system of a fluid pump and a method thereof.

In the previous technology, the fluid pump was operated by the mains power supply. There was no control design for appropriate feedback on the temperature difference and pressure difference in the environment, or the temperature difference and pressure difference were only controlled in sections, which was nonlinear control, so it was impossible to achieve the specific effect of energy saving and protection.

The present invention is a linear control system for a fluid pump, comprising: a microprocessor located on a circuit board; at least one sensor selected from a plurality of temperature sensors or a plurality of pressure sensors, wherein the plurality of temperature sensors are electrically connected to the microprocessor, or the plurality of pressure sensors are electrically connected to the microprocessor; and an inverter control module, wherein a One end of the inverter control module is electrically connected to the microprocessor, one end of the inverter control module is electrically connected to at least one inverter, and the at least one inverter is electrically connected to at least one fluid pump; wherein the microprocessor has a structure of an energy-saving protection module, including: a constant temperature module, a constant pressure module, a differential temperature module, and a differential pressure module, and controls the fluid pump to perform energy-saving protection under constant temperature, constant pressure, differential temperature, and differential pressure states.

The present invention is a linear control system for a fluid pump, wherein the inverter control module has a PID controller, a set point parameter is activated, the target value, time value, and operation response speed value of the PID control module are set, the inverter control module generates an error correction parameter by combining the set point parameter with the feedback adjustment time/variable to generate the error correction parameter, and then performs a compensation parameter, and the voltage value of the output INV is calculated by the compensation parameter. The inverter control module reads back the temperature parameters of a plurality of temperature sensors from the output voltage value of the INV, or reads back the pressure parameters of a plurality of pressure sensors to adjust the time/variable.

The present invention is a linear control system for a fluid pump, wherein the constant temperature module and the constant pressure module include: the target value of the PID control module is sv, after each feedback, the temperature parameters of the plurality of temperature sensors are read back as Trv(1)~Trv(n), the pressure parameters of the plurality of pressure sensors are read back as Prv(1)~Prv(n), wherein the temperature operation ratio op(T) is equal to sv/Trv(n), wherein the pressure operation ratio op(P) is equal to sv/Prv(n), wherein the minimum setting output is Vmin=0.7; after each feedback, when the temperature When the temperature operation ratio op(T) is less than or equal to ≦Vmin, or when the pressure operation ratio op(P) is less than or equal to ≦Vmin, the PID control module generates a reaction time value T(n) of Time1 second, and changes the inverter control module to output 90%~99% at a time to accelerate the fluid pump speed; through each feedback, when 0.8≧the temperature operation ratio op(T)>0.7, or when 0.8≧the pressure operation ratio op(P)>0.7, the PID control module generates a reaction time value T(n) of Time2 seconds, and changes the inverter control module to output 90%~99% at a time to accelerate the fluid pump speed. Output 80%~89% at a time to accelerate the fluid pump speed; through each feedback, when 0.9≧the temperature operation ratio op(T)>0.8, or when 0.9≧the pressure operation ratio op(P)>0.8, the PID control module generates a reaction time value T(n) within Time3 seconds, and changes the inverter control module to output 80%~89% at a time to accelerate the fluid pump speed; through each feedback, when 1.0≧the temperature operation ratio op(T)>0.9, or when 1.0≧the pressure operation ratio op(P)>0.9, the PID control module generates a reaction time value T(n) within Time3 seconds. The time value T(n) is Time4 seconds, the inverter control module output is changed to 80%~89% at a time, and the fluid pump speed is accelerated; through each feedback, when the temperature operation ratio op(T)>1, or when the pressure operation ratio op(P)>1, the PID control module generates a reaction time value T(n) of Time5 seconds, and the inverter control module output is changed to 70% at a time, and the fluid pump speed is accelerated; and the PID control module generates a reaction time value T(n) of Time1≧Time2≧Time3≧Time4≧Time5.

The present invention is a linear control system for a fluid pump, wherein the fluid pump has a pump for controlling fluid transmission, and the fluid pump is selected from a compressor, a chilled water pump, a cooling water pump, and a water pump; and the inverter control module is a PID controller having a function of setting the output frequency range of the inverter, wherein the PID controller (proportional-integral-derivative controller) is composed of a proportional unit, an integral unit, and a derivative unit.

The present invention is a linear control system for a fluid pump, wherein the thermostatic module detects the difference range between a first ambient temperature to be controlled and a first preset thermostatic temperature through the plurality of temperature sensors. When the difference range between the first ambient temperature to be controlled and the first preset thermostatic temperature is greater than 0, the thermostatic module controls the inverter to drive the fluid pump in a frequency-reducing state through the inverter control module, and when the difference range between the first ambient temperature to be controlled and the first preset thermostatic temperature is less than 0, the thermostatic module controls the inverter to drive the fluid pump in an frequency-reducing state through the inverter control module. The fluid pump; the constant pressure module detects the difference between the fluid pressure of a first environment to be controlled and a first preset constant pressure fluid pressure through the plurality of pressure sensors. When the difference between the fluid pressure of the first environment to be controlled and the first preset constant pressure fluid pressure is greater than 0, the The constant pressure module controls the frequency converter to drive the fluid pump in the frequency reduction state through the frequency converter control module, and when the difference between the fluid pressure of the first controlled environment and the first preset constant pressure fluid pressure is less than 0, the constant pressure module controls the frequency converter to increase the frequency through the frequency converter control module. The fluid pump is driven in a state; the temperature difference module detects the difference range between the difference temperature of a second environment temperature to be controlled and a third environment temperature to be controlled through the plurality of temperature sensors. When the difference range between the difference temperature of the second environment temperature to be controlled and the third environment temperature to be controlled is greater than 0, the temperature difference module controls the frequency converter to drive the fluid pump in a frequency reduction state through the frequency converter control module, and when the difference range between the environment temperature to be controlled and the preset constant temperature is less than 0, the constant temperature module controls the frequency converter to drive the fluid pump in a frequency increase state through the frequency converter control module; The differential pressure module detects the difference range between the fluid pressure of a second environment to be controlled and the fluid pressure of a third environment to be controlled through the plurality of pressure sensors. When the difference range between the fluid pressure of the second environment to be controlled and the fluid pressure of the third environment to be controlled is greater than 0, the constant temperature module controls the inverter to drive the fluid pump in a frequency reduction state through the inverter control module, and when the difference range between the fluid pressure of the second environment to be controlled and the fluid pressure of the third environment to be controlled is less than 0, the constant temperature module controls the inverter to drive the fluid pump in a frequency increase state through the inverter control module.

The present invention is a linear control system for a fluid pump, which further includes: an alarm module, which has the function of sending an abnormal alarm when the temperature sensor is detected to be in an abnormal state; a shunt switch module, which has the function of starting the fluid pump to switch from energy-saving operation to mains operation when the temperature sensor is detected to be in an abnormal state; and a circuit board fault module, which starts the shunt switch module to switch the fluid pump from energy-saving operation to mains operation if the circuit board fault module determines that the circuit board is faulty. The PID control module is a linear control, so it can specifically achieve the effect of energy saving and protection.

The present invention is a linear control system for a fluid pump, wherein the temperature differential module and the pressure differential module include: the differential target value of the PID control module is △sv, after each feedback, the temperature differential parameters of the plurality of temperature sensors are read back as △Trv(1)~△Trv(n), and the pressure differential parameters of the plurality of pressure sensors are read back as △Prv(1)~△Prv(n), wherein the temperature differential operation ratio △op(T) is equal to △sv/△Trv(n), wherein the pressure differential operation ratio △op(P) is equal to △sv/△Prv(n), wherein the minimum setting output is Vmin=0.7 ; Through each feedback, when the temperature difference operation ratio △op(T) is less than or equal to ≦Vmin, or when the pressure difference operation ratio op(P) is less than or equal to ≦Vmin, the PID control module generates a reaction time value T(n) within Time6 seconds, and changes the inverter control module to output 90%~99% at a time to accelerate the fluid pump speed; through each feedback, when 0.8≧the temperature difference operation ratio △op(T)>0.7, or when 0.8≧the pressure difference operation ratio △op(P)>0.7, the PID control module generates a reaction time value T(n) within Time7 seconds, and changes The inverter control module outputs 80%~89% at a time to accelerate the speed of the fluid pump; through each feedback, when 0.9≧the temperature difference operation ratio △op(T)>0.8, or when 0.9≧the pressure difference operation ratio △op(P)>0.8, the PID control module generates a reaction time value T(n) of Time8 seconds, and changes the inverter control module to output 80%~89% at a time to accelerate the speed of the fluid pump; through each feedback, when 1.0≧the temperature difference operation ratio △op(T)>0.9, or when 1.0≧the pressure difference operation ratio △op(P)>0.9, the PID control module generates a reaction time value T(n) of Time8 seconds, and changes the inverter control module to output 80%~89% at a time to accelerate the speed of the fluid pump; through each feedback, when 1.0≧the temperature difference operation ratio △op(T)>0.9, or when 1.0≧the pressure difference operation ratio △op(P)>0.9, the PID control module generates a reaction time value T(n) of Time8 seconds, and changes the inverter control module to output 80%~89% at a time to accelerate the speed of the fluid pump The control module generates a reaction time value T(n) of Time9 seconds, and changes the inverter control module to output 80%~89% at a time to accelerate the fluid pump speed; through each feedback, when the temperature difference operation ratio op(T)>1, or when the pressure difference operation ratio op(P)>1, the PID control module generates a reaction time value T(n) of Time10 seconds, and changes the inverter control module to output 70% at a time to accelerate the fluid pump speed; and the PID control module generates a reaction time value T(n) of Time6≧Time7≧Time8≧Time9≧Time10.

1: Encryption operation integrated circuit

2: Microprocessor

3: Oscillator battery

21: Temperature sensor

22: Pressure sensor

23: Inverter control module

241: Shunt switch module

242: Alarm module

25: Circuit board fault module

26: Energy saving protection module

27: Internet of Things module

28:LED display

29: LCD display

41: Constant temperature module

42: Constant pressure module

43: Differential temperature module

44: Differential pressure module

61: Inverter

62: Fluid pump

100: Circuit board

S101~S108, S111~S117, S121~S128, S131~S132: Steps

S201~S208, S211~S217, S221~S228, S231~S232: Steps

S301~S308, S311~S317, S321~S328, S331~S332: Steps

S401~S408, S411~S417, S421~S428, S431~S432: Steps

S501~S506: Steps

Figure 1 is a schematic diagram of the linear control system of the fluid pump of the present invention.

Figure 2 is a schematic diagram of the circuit structure of the linear control system of the fluid pump of the present invention.

Figure 3 is a schematic diagram of the constant temperature method of the linear control system of the fluid pump of the present invention.

Figure 4 is a schematic diagram of the dual fluid pump constant temperature method of the linear control system of the fluid pump of the present invention.

Figure 5 is a schematic diagram of the constant pressure method of the linear control system of the fluid pump of the present invention.

Figure 6 is a schematic diagram of the dual fluid pump constant pressure method of the linear control system of the fluid pump of the present invention.

Figure 7 is a schematic diagram of the temperature difference method of the linear control system of the fluid pump of the present invention.

Figure 8 is a schematic diagram of the dual fluid pump temperature difference method of the linear control system of the fluid pump of the present invention.

Figure 9 is a schematic diagram of the differential pressure method of the linear control system of the fluid pump of the present invention.

Figure 10 is a schematic diagram of the square bi-fluid pump differential pressure method of the linear control system of the fluid pump of the present invention.

Figure 11 is a linear control schematic diagram of the linear control system of the fluid pump of the present invention.

Figure 12 is a measurement diagram of the linear control system of the fluid pump of the present invention.

As shown in FIG. 1 and FIG. 2, the present invention is a control system for a fluid pump 62, comprising: a microprocessor 2, located on a circuit board; at least one sensor selected from a plurality of temperature sensors 21 or a plurality of pressure sensors 22, wherein the plurality of temperature sensors 21 are electrically connected to the microprocessor 2, or the plurality of pressure sensors 22 are electrically connected to the microprocessor 2; and an inverter control module 23, wherein the inverter control module 23 One end of the inverter control module 23 is electrically connected to the microprocessor 2, one end of the inverter control module 23 is electrically connected to at least one inverter 61, and the at least one inverter 61 is electrically connected to at least one fluid pump 62; wherein the microprocessor 2 has a structure of an energy-saving protection module 26, including: a constant temperature module 41, a constant pressure module 42, a differential temperature module 43, and a differential pressure module 44, to control the fluid pump 62 to perform energy-saving protection under constant temperature, constant pressure, differential temperature, and differential pressure states. Among them, the fluid pump 62 can be applied to water pumping motors and refrigeration air conditioners.

As shown in Fig. 1 and Fig. 2, the present invention is a control system of a fluid pump 62, which has an encryption operation integrated circuit 1, a microprocessor 2, an oscillator battery 3, a temperature sensor 21, which can be composed of PT-100. A pressure sensor 22. A frequency converter control module 23, which can be controlled by 1x3 0~10V 0~100% output. A bypass shunt switch module 241, which can be composed of a relay. An alarm module 242, which can be composed of a relay. A circuit board fault module 25, which can be composed of a relay. An energy-saving protection module 26, which can be read by a 24V DCID. The IoT module 27 can be connected to the cloud for data transmission and remote control. The connection function of the LED display 28 and the LCD display 29 can display the status information of the Bypass shunt switch module 241, the Alarm warning module 242, the circuit board fault module 25, and the energy-saving protection module 26 on the LED display 28 and the LCD display 29. The oscillator battery 3 provides the synchronization timing of the microprocessor 2. The encryption operation integrated circuit 1 is an AES IC, which provides symmetric encryption for the microprocessor 2. It is a widely used data encryption algorithm that uses the same key for encryption and decryption. The AES (Advanced Encryption Standard) encryption algorithm is a widely used symmetric encryption algorithm.

As shown in FIG. 3 and FIG. 4, the present invention is a control system for a fluid pump 62, wherein the constant temperature module 41 comprises: step S101, starting the constant temperature module 41 to perform constant temperature temperature state control; step S102, setting a temperature reference value T0 in the constant temperature temperature state; step S103, setting a temperature error range TE in the constant temperature temperature state; step S104, setting a maximum output frequency Fmax of a frequency converter 61 between 0 and 100% in the constant temperature temperature state; step S105, setting a minimum output frequency Fmax of the frequency converter 61 between 0 and 100% in the constant temperature temperature state. Fmin; Step S106, DI1=1 is started (ON), and 100% of the energy-saving operation time of a fluid pump 62 is executed; Step S107, the fluid pump 62 is started, and one of the operation modes is selected from a single fluid pump 62, two fluid pumps 62, and three fluid pumps 62; Step S108, the exchange time of the fluid pump 62 is started, wherein the exchange time of two fluid pumps 62 is 24 hours/2=12 hours, and the exchange time of three fluid pumps 62 is 24 hours/3=8 hours; Step S111, is to enter step S111 from step S108, take the start signal, and judge Whether it is the start (ON) state of DI1=1; Step S112, from step S111 to step S112, if DI1=1 is the start (ON) state, then determine whether 100% of the fluid pump 62 has reached the energy-saving operation time; Step S113, from step S112 to step S113, if the fluid pump 62 has not reached the energy-saving operation time, perform continuous detection of the fault state of the plurality of temperature sensors 21; Step S115, from step S113 to step S115, if the state of the temperature sensor 21 is detected to be abnormal, then step S115 to step S1 17, an abnormal alarm is issued by an alarm module 242, or a shunt switch module 241 is activated to execute the fluid pump 62 to switch from energy-saving operation to mains operation; step S114, from step S112 to step S114, if the energy-saving operation time of the fluid pump 62 reaches 100%, the operating temperature T1 of the environment is detected by a plurality of temperature sensors 21, and when (the operating temperature T1 of the environment + the temperature error range TE)-the temperature reference value T0>0, the frequency converter 61 is executed to reduce the frequency through a PID controller. In addition, when (the operating temperature T1 of the environment - the temperature error range TE )-When the temperature reference value T0<0, the PID controller executes the frequency conversion of the inverter 61; Step S116, from step S114 to step S116, executes the state detection of a temperature sensor 21 continuously. If the state of the temperature sensor 21 is detected to be abnormal, then step S116 enters step S117, and an abnormal alarm is issued through an alarm module 242, or a shunt switch module 241 is activated to execute the fluid pump 62 to switch from energy-saving operation to mains operation; Step S121, from step S108 to step S121 of switching the two fluid pumps 62, determines which one of them is Whether the operation time of one of the fluid pumps 62 has been reached, if one of the fluid pumps 62 has reached the operation time, then the process goes from step S121 to step S123, and after switching to the operation of the other fluid pump 62, the process goes directly from step S123 to step S121; step S122 is from step S121 to step S122, if one of the fluid pumps 62 has not reached the operation time, then the start signal is continuously detected, and then the process goes from step S122 to step S124, if DI1=0, that is, there is no start signal state, and the inverter 61 is counted as shut down, and then the process goes from step S124 to step S125. Enter directly into step S121; step S125, from step S122, enter step S125, continue to detect the fault state of the temperature sensor 21, if the state of the temperature sensor 21 or the pressure sensor 22 is detected to be abnormal, then enter step S126 from step S125, send out an abnormal alarm through the alarm module 242, or start the shunt switch module 241, execute the fluid pump 62 to switch from energy-saving operation to mains operation; step S127, from step S125, enter step S127, determine whether the inverter 61 fault signal of DI2=0 occurs, If the inverter 61 fails, the process goes from step S127 to step S128, where the alarm module 242 issues an abnormal alarm, or the shunt switch module 241 is activated to switch the fluid pump 62 from energy-saving operation to AC operation; and step S131 is a circuit board fault module 25. The process goes from step S108 to step S131, where the circuit board fault module 25 determines whether the circuit board is faulty. If the circuit board is faulty, the process goes from step S131 to step S132, where the shunt switch module 241 is activated to switch the fluid pump 62 from energy-saving operation to AC operation. Among them, step S112, from step S111 to step S112, if DI1=1 is the start (ON) state, then determine whether the 100% of the fluid pump 62 has reached the energy-saving operation time, mainly remote start, is to notify the control system equipment to start the energy-saving mode, but when it is just started, the need for heating or the sensor (sensor) feedback value and the set target value are too large, then it will output full speed operation (100%), reach close to the target value, and enter PID operation control. Among them, 0-100% refers to INV=0V to 10V, providing a DC voltage signal to the frequency conversion control. Among them, 50% means that the inverter output is 60hz * 0.5=30hz, 220vac * 0.5=110VAC, so the inverter output is 110VAC/30Hz. Among them, 70% means that the inverter output is 60hz * 0.7=42hz, 220vac * 0.7=154VAC, so the inverter output is 154VAC/42Hz, and the rest is similar.

As shown in FIG. 5 and FIG. 6 , the present invention is a control system for a fluid pump 62, wherein the steps of the constant pressure module 42 include: step S201, starting the constant pressure module 42 to perform constant pressure state control; step S202, setting a pressure reference value P0 in the constant pressure state; step S203, In the constant pressure state, the pressure error range PE is set; in step S204, in the constant pressure state, the maximum output frequency Fmax of the inverter 61 is set between 0 and 100%; in step S205, in the constant temperature state, the minimum output frequency Fmax of the inverter 61 is set between 0 and 100%. frequency Fmin; Step S206, DI1=1 is started (ON), and 100% of the energy-saving operation time of a fluid pump 62 is executed; Step S207, the fluid pump 62 is started, and one of the operation modes is selected from a single fluid pump 62, two fluid pumps 62, and three fluid pumps 62; Step S208, the exchange time of the fluid pump 62 is started, wherein the exchange time of two fluid pumps 62 is 24 hours/2=12 hours, and the exchange time of three fluid pumps 62 is 24 hours/3=8 hours; Step S211, is to enter step S211 from step S208, and obtain the start signal Number, determine whether it is the start (ON) state of DI1=1; step S212, enter step S212 from step S211, if DI1=1 is the start (ON) state, then determine whether 100% of the fluid pump 62 has reached the energy-saving operation time; step S213, enter step S213 from step S212, if the fluid pump 62 has not reached the energy-saving operation time, perform continuous detection of the fault state of the plurality of pressure sensors 22; step S215, enter step S215 from step S213, if the state of the pressure sensor 22 is detected to be abnormal, enter step S215 Step S217, an abnormal alarm is issued through an alarm module 242, or a shunt switch module 241 is activated to execute the fluid pump 62 to switch from energy-saving operation to mains operation; Step S214, step S212 enters step S214, if the energy-saving operation time of the fluid pump 62 reaches 100%, the operating pressure P1 of the environment is detected by a plurality of pressure sensors 22, and when (the operating pressure P1 of the environment + the pressure error value range PE) - the temperature reference value P0>0, the frequency converter 61 is executed to reduce the frequency through a PID controller. In addition, when (the operating pressure P1 of the environment - ... When the pressure reference value P0 < 0, the PID controller executes the frequency conversion of the inverter 61; Step S216, from step S214 to step S216, to continuously detect the state of a pressure sensor 22, if the state of the pressure sensor 22 is detected to be abnormal, then from step S216 to step S217, an abnormal alarm is issued through an alarm module 242, or a shunt switch module 241 is activated to execute the fluid pump 62 to switch from energy-saving operation to mains operation; Step S221, from step S208 to step S222 of switching the two fluid pumps 62 1. Determine whether the operation time of one of the fluid pumps 62 has been reached. If one of the fluid pumps 62 has reached the operation time, then go from step S221 to step S223, switch to another of the fluid pumps 62 to operate, and then directly go from step S223 to step S221; step S222 is from step S221 to step S222. If one of the fluid pumps 62 has not reached the operation time, continue to detect the start signal, and then go from step S222 to step S224. If DI1=0, it is in the state of no start signal, the inverter 61 is counted as shut down, and then From step S224, directly enter step S221; step S225, from step S222, enter step S225, continue to detect the fault state of the pressure sensor 22, if the state of the pressure sensor 22 is detected to be abnormal, then from step S225 to step S226, through the alarm module 242 to send out an abnormal alarm, or start the shunt switch module 241, execute the fluid pump 62 from energy-saving operation to mains operation; step S227, from step S225, enter step S227, determine whether the inverter 61 fault signal of DI2=0 occurs, if After the inverter 61 fails, the process goes from step S227 to step S228, where the alarm module 242 issues an abnormal alarm, or the shunt switch module 241 is activated to switch the fluid pump 62 from energy-saving operation to AC operation; and step S231 is a circuit board fault module 25. The process goes from step S208 to step S231, where the circuit board fault module 25 determines whether the circuit board is faulty. If the circuit board is faulty, the process goes from step S231 to step S232, where the shunt switch module 241 is activated to switch the fluid pump 62 from energy-saving operation to AC operation. Among them, in step S212, if DI1=1 is the start (ON) state, then determine whether the 100% fluid pump 62 has reached the energy-saving operation time, mainly remote start, which is to notify the equipment of the control system to start the energy-saving mode. However, when it is just started, the warm-up is required or the sensor feedback value and the set target value are too large, then it will output full speed operation (100%), and when it reaches close to the target value, it will enter PID operation control.

As shown in FIG. 7 and FIG. 8, the present invention is a control system for a fluid pump 62, wherein the steps of the temperature differential module 43 include: step S301, starting the temperature differential module 43, and executing the temperature differential state control; step S302, in the temperature differential state, setting a reference value (T2-T1) of the difference between two temperatures (T2, T1); step S303, in the temperature differential state, setting a temperature error range TE; step S304, in the temperature differential state, setting a maximum output frequency Fmax of a frequency converter 61 between 0 and 100%; step S305, in the temperature differential state, setting the frequency converter 61 between 0 and 100%. The minimum output frequency Fmin of the device 61; Step S306, DI1=1 is started (ON), and 100% of the energy-saving operation time of a fluid pump 62 is executed; Step S307, the fluid pump 62 is started, and one of the operation modes is selected from a single fluid pump 62, two fluid pumps 62, and three fluid pumps 62; Step S308, the exchange time of the fluid pump 62 is started, where two fluid pumps 62 are 24 hours/2=12 hours, and three fluid pumps 62 are 24 hours/3=8 hours; Step S311, is to enter step S311 from step S308, and take the start signal , determine whether it is the start (ON) state of DI1=1; step S312, enter step S312 from step S311, if DI1=1 is the start (ON) state, then determine whether 100% of the fluid pump 62 has reached the energy-saving operation time; step S313, enter step S313 from step S312, if the fluid pump 62 has not reached the energy-saving operation time, perform continuous detection of the fault status of the plurality of temperature sensors 21; step S315, enter step S315 from step S313, if the state of the temperature sensor 21 is detected to be abnormal, then enter step S317 from step S315, through a The alarm module 242 sends out an abnormal alarm, or activates a shunt switch module 241 to switch the fluid pump 62 from energy-saving operation to mains operation; Step S314, enter step S314 from step S312, if the energy-saving operation time of the fluid pump 62 reaches 100%, the plurality of temperature sensors 21 detect the operating temperature T2 and the operating temperature T1 of the environment, when (the operating temperature of the environment (T2-T1) + the temperature error range TE) - the reference value (T2-T1) of the difference between the two temperatures (T2, T1)>0, the frequency converter 61 is reduced by a PID controller, and in addition, when (the operating temperature of the environment (T2-T1) + the temperature error range TE) - the reference value (T2-T1) of the difference between the two temperatures (T2, T1)>0 When the temperature (T2-T1)-temperature error range TE)-reference value (T2-T1) of the difference between the two temperatures (T2, T1) < 0, the PID controller executes the frequency conversion device 61 to increase the frequency; Step S316, from step S314 to step S316, to continuously detect the state of the frequency conversion device 61, if the state of the frequency conversion device 61 is detected to be abnormal, DI2=0, then from step S316 to step S317, an abnormal alarm is issued through an alarm module 242, or a shunt switch module 241 is activated to execute the fluid pump 62 to switch from energy-saving operation to mains operation; Step S321, from step S324 S308, enter step S321 of switching between the two fluid pumps 62, determine whether the operation time of one of the fluid pumps 62 has been reached, if one of the fluid pumps 62 has reached the operation time, then from step S321, enter step S323, switch to the other fluid pump 62 after operation, and then directly enter step S321 from step S323; step S322, from step S321, enter step S322, if one of the fluid pumps 62 has not reached the operation time, then continue to detect the start signal, and then from step S322, enter step S324, if DI1=0, it is in the state of no start signal, After the inverter 61 enters shutdown, it enters step S324 and directly enters step S321; step S325 is to enter step S325 from step S322, and continuously detect the fault status of the plurality of temperature sensors 21. If the status of the plurality of temperature sensors 21 is detected to be abnormal, it enters step S326 from step S325, and issues an abnormal alarm through the alarm module 242, or starts the shunt switch module 241 to execute the fluid pump 62 to switch from energy-saving operation to mains operation; step S327 is to enter step S327 from step S325 to determine whether the inverter with DI2=0 61 fault signal occurs. If the inverter 61 fails, the process goes from step S327 to step S328, and the alarm module 242 sends out an abnormal alarm, or the shunt switch module 241 is activated to switch the fluid pump 62 from energy-saving operation to AC operation; and step S331 is a circuit board fault module 25. The process goes from step S308 to step S331, and the circuit board fault module 25 determines whether the circuit board is faulty. If the circuit board is faulty, the process goes from step S331 to step S332, and the shunt switch module 241 is activated to switch the fluid pump 62 from energy-saving operation to AC operation. Among them, step S312, if DI1=1 is the start (ON) state, then determine whether 100% of the fluid pump 62 has reached the energy-saving operation time, mainly remote start, which is to notify the equipment of the control system to start the energy-saving mode. However, when it is just started, it needs to be warmed up or the sensor feedback value and the set target value are too large, then it will output full speed operation (100%), and when it reaches close to the target value, it will enter the PID operation control. Among them, 0-100% refers to INV=0V to 10V, providing a DC voltage signal to the frequency conversion control. Among them, 50% means that the frequency converter outputs 60hz * 0.5=30hz, 220vac * 0.5=110VAC, so the frequency converter outputs 110VAC/30Hz. Among them, 70% means that the inverter output is 60hz * 0.7=42hz, 220vac * 0.7=154VAC, the inverter output is 154VAC/42Hz, and so on for the others.

As shown in FIG9 and FIG10, the present invention is a control system for a fluid pump 62, wherein the steps of the differential pressure module 44 include: step S401, starting the differential pressure module 44, and executing differential pressure state control; step S402, in the differential pressure state, setting two pressure difference reference values (P1-P2); step S403, in the differential pressure state, setting a pressure error range PE; step S404, in the differential pressure state, setting a maximum output frequency Fmax of a frequency converter 61 between 0 and 100%; step S405, in the differential temperature state, setting a maximum output frequency Fmax of the frequency converter 61 between 0 and 100%. Small output frequency Fmin; Step S406, DI1=1 is started (ON), and 100% of the energy-saving operation time of a fluid pump 62 is executed; Step S407, start the fluid pump 62, and select one of the operation modes from a single fluid pump 62, two fluid pumps 62, and three fluid pumps 62; Step S408, start the exchange time of the fluid pump 62, where two fluid pumps 62 are 24 hours/2=12 hours, and three fluid pumps 62 are 24 hours/3=8 hours; Step S411, enter step S411 from step S208, take the start signal, and judge whether it is No, it is the start (ON) state of DI1=1; Step S412, from step S411 to step S412, if DI1=1 is the start (ON) state, then determine whether 100% of the fluid pump 62 has reached the energy-saving operation time; Step S413, from step S412 to step S413, if the fluid pump 62 has not reached the energy-saving operation time, perform continuous detection of the fault state of the plurality of pressure sensors 22; Step S415, from step S413 to step S415, if the state of the pressure sensor 22 is detected to be abnormal, then from step S415 to step S417, through an alarm Module 242 issues an abnormal alarm, or activates a shunt switch module 241 to switch the fluid pump 62 from energy-saving operation to mains operation; step S414, enter step S414 from step S412, if the energy-saving operation time of the fluid pump 62 reaches 100%, the operating pressure P1 and the operating pressure P2 of the environment are detected by a plurality of pressure sensors 22, when (the operating pressure difference of the environment (P1-P2) + the pressure error value range PE) - the two pressure difference reference values (P1-P2)>0, the frequency converter 61 is executed to reduce the frequency through a PID controller, and in addition, when (the operating pressure difference of the environment (P1 -P2)-pressure error range PE)-two pressure difference reference values (P1-P2) <0, the PID controller executes the frequency converter 61 to increase the frequency; step S416, from step S414 to step S416, execute continuous detection of the status of multiple pressure sensors 22, if the detection is If the status of the plurality of pressure sensors 22 is abnormal, the process proceeds from step S416 to step S417, where an alarm module 242 issues an abnormal alarm, or a shunt switch module 241 is activated to switch the fluid pump 62 from energy-saving operation to mains operation; step S421 is the process proceeds from step S408 to step S418. The step S421 of switching the two fluid pumps 62 determines whether the operation time of one of the fluid pumps 62 has been reached. If one of the fluid pumps 62 has reached the operation time, then the step S421 enters the step S423, and after switching to the other fluid pump 62 to operate, the step S423 directly enters the step S421; the step S422 is to enter the step S422 from the step S421. If one of the fluid pumps 62 has not reached the operation time, the start signal is continuously detected, and then the step S422 enters the step S424. If DI1=0, it is in the state of no start signal, and the inverter 6 1 enters shutdown, then enters directly into step S421 from step S424; step S425, enters step S425 from step S422, and continuously detects the fault status of the plurality of pressure sensors 22. If the status of the plurality of pressure sensors 22 is detected to be abnormal, then enters step S426 from step S425, and issues an abnormal alarm through the alarm module 242, or activates the shunt switch module 241 to switch the fluid pump 62 from energy-saving operation to mains operation; step S427, enters step S427 from step S425, and determines whether the inverter 61 with DI2=0 is faulty. A fault signal occurs. If the inverter 61 fails, the process goes from step S427 to step S428, where the alarm module 242 issues an abnormal alarm, or the shunt switch module 241 is activated to switch the fluid pump 62 from energy-saving operation to mains operation; and step S431 is a circuit board fault module 25. The process goes from step S408 to step S431, where the circuit board fault module 25 determines whether the circuit board is faulty. If the circuit board is faulty, the process goes from step S431 to step S432, where the shunt switch module 241 is activated to switch the fluid pump 62 from energy-saving operation to mains operation. In step S412, if DI1=1 is in the start (ON) state, it is determined whether the 100% fluid pump 62 has reached the energy-saving operation time. It is mainly remote start, which is to notify the equipment of the control system to start the energy-saving mode. However, when it is just started, it needs to be heated or the sensor feedback value and the set target value are too large, then it will output full speed operation (100%), and when it reaches the target value, it will enter the PID operation control. Among them, 0-100% means INV=0V to 10V, providing a DC voltage signal to the frequency conversion control. Among them, 50% means that the frequency converter 61 outputs 60hz * 0.5=30hz, 220vac * 0.5=110VAC, so the frequency converter 61 outputs 110VAC/30Hz. Among them, 70% means that the inverter 61 outputs 60hz * 0.7=42hz, 220vac * 0.7=154VAC, the inverter 61 outputs 154VAC/42Hz, and so on for the others.

As shown in FIG11 , the present invention is a control system for a fluid pump 62, wherein the constant temperature and constant pressure control of the fluid pump 62 has the steps of a PID control module, a PID controller (proportional-integral-derivative controller), which is composed of a proportional unit, an integral unit, and a derivative unit. The characteristics can be adjusted by adjusting the gains and of these three units. The PID controller is mainly applicable to systems that are basically linear and whose dynamic characteristics do not change with time.

As shown in FIG. 11 , the present invention is a control system for a fluid pump 62. The steps of the PID control module include: step S501, starting the set point parameter, setting the target value, time value, and operation response speed value of the PID control module, and the inverter 61; step S502, the set point parameter of step S501 - the adjustment time/variable of step S506 = the product of step S502; Generate an error correction parameter; Step S503, perform compensation parameters based on the error correction parameter generated in Step S502; Step S504, calculate the voltage value of the output INV based on the compensation parameter in Step S503; Step S505, read back the temperature parameters of multiple temperature sensors 21, or read back the pressure parameters of multiple pressure sensors 22; Step S506, adjust the time/variable.

As shown in FIG. 11 , the present invention is a control system for a fluid pump 62, wherein the PID control module is first set to achieve a PID target value, a PID time value, and a response speed value of the inverter 61, for example, the PID target value is set to 25 degrees, the PID time value is 4 seconds, and the inverter 61 operation response value is 2 seconds. If the room temperature is read back to be 33 degrees, 33-25=8 degrees, the INV value is calculated, and if it is greater than 4 degrees, INV=100%. (PID target value, PID time value, inverter 61 response speed value), in order: (4 degrees, 4 seconds, operation response value 2 seconds), (3 degrees, 3 seconds, operation response value 1.5 seconds), (2 degrees, 2 seconds, operation response value 1 second), (1 degree, 1 second, operation response value 0.5 seconds), (0.5 degrees, 0.5 seconds, operation response value 0.1 seconds), (below 0.5 degrees, PID does not operate, INV maintains constant value output). In addition, here is the target temperature difference = PID time value. The closer to the target, the faster the response, so that the temperature value remains unchanged as much as possible.

As shown in FIG. 11 , the present invention is a control system for a fluid pump 62, wherein in step S502, the time response value, the longer the time, the slower the response speed, the shorter the time, the over-reaction will occur, and the time will be automatically adjusted according to the feedback value and the set target value, and when the feedback value and the set value are close, the PID time is handed over to the time set value of step S502. Step S503, step S504, after PID feedback, the feedback temperature and pressure difference or field value will be different from the current set value. If the difference ratio is large, the INV output value will be accelerated (step S503=0 without time correction). If the difference ratio is small, INV will be adjusted slowly (step S503=set value, plus time value) (INV=0-10V=0-100%->control inverter 61 output power load) to achieve the on-site control of the compressor output kinetic energy. Among them, step S505 is related to PID control and time. The speed of time affects whether the output will cause swing. According to the on-site space and load energy, adjust the appropriate time. The faster the load may be overloaded, and the slower the motor may be stuck or overheated due to insufficient torque. Among them, 50% means that the inverter 61 outputs 60hz * 0.5=30hz, 220vac * 0.5=110VAC, so the inverter 61 outputs 110VAC/30Hz. Among them, 70% means that the inverter 61 outputs 60hz * 0.7=42hz, 220vac * 0.7=154VAC, and the inverter 61 outputs 154VAC/42Hz. The others are similar.

As shown in FIG. 11 , the present invention is a linear control method for a fluid pump 62, which includes: using a microprocessor 2 located on a circuit board; using at least one sensor selected from a plurality of temperature sensors 21 or a plurality of pressure sensors 22, wherein the plurality of temperature sensors 21 are electrically connected to the microprocessor 2, or the plurality of pressure sensors 22 are electrically connected to the microprocessor 2; and using an inverter control module 23, one end of which is electrically connected to the microprocessor 2. The microprocessor 2 is provided with a structure of an energy-saving protection module 26, including: a constant temperature module 41, a constant pressure module 42, a differential temperature module 43, and a differential pressure module 44, to control the fluid pump 62 to perform energy-saving protection under constant temperature, constant pressure, differential temperature, and differential pressure conditions; the inverter control module 23 is provided with a PID controller to start a setting The inverter control module 23 generates an error correction parameter by combining the set point parameter with the feedback adjustment time/variable, and then performs a compensation parameter, and calculates the voltage value of the output INV by the compensation parameter. The inverter control module 23 reads back the temperature parameters of the plurality of temperature sensors 21 from the output voltage value of the INV, or reads back the temperature parameters of the plurality of temperature sensors 21. The time/variable is adjusted after the pressure parameters of the plurality of pressure sensors 22; wherein the constant temperature module 41 and the constant pressure module 42 include: the target value of the PID control module is sv, after each feedback, the temperature parameters of the plurality of temperature sensors 21 are read back as Trv(1)~Trv(n), and the pressure parameters of the plurality of pressure sensors 22 are read back as Prv(1)~Prv(n), wherein the temperature operation ratio op(T) is equal to sv/Trv(n), wherein the pressure operation The ratio op(P) is equal to sv/Prv(n), where the minimum setting output is Vmin=0.7; through each feedback, when the temperature operation ratio op(T) is less than or equal to ≦Vmin, or when the pressure operation ratio op(P) is less than or equal to ≦Vmin, the PID control module generates a reaction time value T(n) of Time1 seconds, and changes the inverter control module 23 to output 90%~99% at a time, accelerating the speed of the fluid pump 62; through each feedback, when 0 .8≧the temperature operation ratio op(T)>0.7, or when 0.8≧the pressure operation ratio op(P)>0.7, the PID control module generates a reaction time value T(n) of Time2 seconds, changes the inverter control module 23 to output 80%~89% at a time, and accelerates the speed of the fluid pump 62; through each feedback, when 0.9≧the temperature operation ratio op(T)>0.8, or when 0.9≧the pressure operation ratio op(P)>0.8, the PID The control module generates a reaction time value T(n) of Time within 3 seconds, and changes the inverter control module 23 to output 80%~89% at a time, accelerating the speed of the fluid pump 62; through each feedback, when 1.0≧the temperature operation ratio op(T)>0.9, or when 1.0≧the pressure operation ratio op(P)>0.9, the PID control module generates a reaction time value T(n) of Time within 4 seconds, and changes the inverter control module 23 to output 80%~89% at a time, Accelerate the speed of the fluid pump 62; through each feedback, when the temperature operation ratio op(T)>1, or when the pressure operation ratio op(P)>1, the PID control module generates a reaction time value T(n) of Time5 seconds, and changes the inverter control module 23 to output 70% at a time to accelerate the speed of the fluid pump 62; and the PID control module generates a reaction time value T(n) of Time1≧Time2≧Time3≧Time4≧Time5.

As shown in Table 1, PID algorithm method - constant temperature mode, where (1) the target error tolerance ratio is ±5% (B); (2) the target value of the PID control module is sv, which is the target setting value; (3) the time value T(n) for generating the reaction is the time parameter value; (4) the actual value is fed back, the temperature parameters of the multiple temperature sensors 21 are Trv(1)~Trv(n), and the pressure parameters of the multiple pressure sensors 22 are Prv(1)~Prv(n); (5) the output 0-10V change value, in Table 1, here, 0~1 corresponds to the conversion percentage of 0%~100%, for example, 1V is 10% for 1 phase. For example, 7V is 70% for 7 phases. For example, 8V is 80% for 7 phases. For example, 10V is 100% for 10 phases.

As shown in Table 1, the target value sv±B, the time parameter value is selected as {4,3,2,1,0.5}sec. Among them, when sv/Trv(n)<0.7→the output is 100% when the time changes by 4sec. Among them, when sv/Trv(n)>0.7 &&<0.8→the output is 90%~99% when the time changes by 3sec. Among them, when sv/Trv(n)>0.8 &&<0.9→the output is 80%~89% when the time changes by 2sec. Among them, when sv/Trv(n)>0.9 &&<1.0 →the output is 70%~79% when the time changes by 1sec. Among them, when sv/Trv(n)>1.0→the output is 70% when the time changes by 1sec.

As shown in Table 1, it is as follows: (lower than sv, the minimum output lasts for 10 minutes, and the output stops).

The present invention is a linear control method for a fluid pump 62, wherein the temperature differential module 43 and the pressure differential module 44 are used, including: using the differential target value of the PID control module as △sv, after each feedback, reading back the temperature differential parameters of the plurality of temperature sensors 21 as △Trv(1)~△Trv(n), reading back the pressure differential parameters of the plurality of pressure sensors 22 as △Prv(1)~△Prv(n), wherein the temperature differential operation ratio △op(T) is equal to △sv/△Trv(n), wherein the pressure differential operation ratio △op(P) is equal to △sv/△Prv(n), wherein the minimum setting output is Vmin= 0.7; when the temperature difference operation ratio △op(T) is less than or equal to ≦Vmin, or when the pressure difference operation ratio op(P) is less than or equal to ≦Vmin, the PID control module generates a reaction time value T(n) within 6 seconds, and changes the inverter control module 23 to output 90%~99% at a time to accelerate the speed of the fluid pump 62; when 0.8≧the temperature difference operation ratio △op(T)>0.7, or when 0.8≧the pressure difference operation ratio △op(P)>0.7, the PID control module generates a reaction time value T(n) within 7 seconds, and changes the inverter control module 23 to output 90%~99% at a time to accelerate the speed of the fluid pump 62; The inverter control module 23 outputs 80%~89% at a time to accelerate the speed of the fluid pump 62; through each feedback, when 0.9≧the temperature difference operation ratio △op(T)>0.8, or when 0.9≧the pressure difference operation ratio △op(P)>0.8, the PID control module generates a reaction time value T(n) of Time8 seconds, and changes the inverter control module 23 to output 80%~89% at a time to accelerate the speed of the fluid pump 62; through each feedback, when 1.0≧the temperature difference operation ratio △op(T)>0.9, or when 1.0≧the pressure difference operation ratio △op(P)>0.9 ... The control module generates a reaction time value T(n) within 9 seconds, and the inverter control module 23 is changed to output 80%~89% at a time to accelerate the speed of the fluid pump 62; through each feedback, when the temperature difference operation ratio op(T)>1, or when the pressure difference operation ratio op(P)>1, the PID control module generates a reaction time value T(n) within 10 seconds, and the inverter control module 23 is changed to output 70% at a time to accelerate the speed of the fluid pump 62; and the PID control module is used, and the reaction time value T(n) is Time6≧Time7≧Time8≧Time9≧Time10. The PID control module generates a response time value T(n), Time1 is 4 seconds, Time2 is 3 seconds, Time3 is 2 seconds, Time4 is 1 second, Time5 is 0.5 seconds, Time6 is 4 seconds, Time7 is 3 seconds, Time8 is 2 seconds, Time9 is 1 second, and Time10 is 0.5 seconds.

As shown in Table 2, PID algorithm mode - differential temperature mode, at this time, the temperature difference parameter is △Trv(1)~△Trv(n), T2-T1=△sv=6 degrees, △Trv=12 degrees (differential temperature mode).

As shown in Table 2, the differential temperature mode: (1) the target error tolerance ratio is ±5% (B); (2) the temperature difference target value of the PID control module is △sv, which is the target setting value; (3) the time value T(n) for generating the reaction is the time parameter value; (4) the actual value is fed back, the temperature difference parameter of the plurality of temperature sensors 21 is △Trv(1)~△Trv(n), and the pressure difference parameter of the plurality of pressure sensors 22 is △Prv(1)~△Prv(n); (5) the output 0-10V change value, in Table 1, here, 0~1 corresponds to the conversion percentage of 0%~100%, for example, 1V is 10% for 1 phase. For example, 7V is 70% for 7 phases. For example, 10V is 10, which corresponds to a conversion percentage of 100%.

As shown in Table 2, it is as follows: (below △sv, the minimum output lasts for 10 minutes, and the output stops).

Figure 12 shows a measurement diagram of the linear control system of the fluid pump of the present invention. The present invention uses linear feedback to achieve the desired change with precise and continuous changes.

The above description and explanation are only the description of the preferred embodiment of this creation. Those with common knowledge of this technology can make other modifications according to the scope of the patent application defined below and the above description, but these modifications should still be for the creative spirit of this creation and within the scope of rights of this creation.

1: Encryption operation integrated circuit

2: Microprocessor

3: Oscillator battery

21: Temperature sensor

22: Pressure sensor

23: Inverter control module

241: Shunt switch module

242: Alarm module

25: Circuit board fault module

26: Energy saving protection module

27: Internet of Things module

28:LED display

29: LCD display

41: Constant temperature module

42: Constant pressure module

43: Differential temperature module

44: Differential pressure module

61: Inverter

62: Fluid pump

Claims (9)

A linear control system for a fluid pump, comprising: a microprocessor located on a circuit board; at least one sensor selected from a plurality of temperature sensors or a plurality of pressure sensors, wherein the plurality of temperature sensors are electrically connected to the microprocessor, or the plurality of pressure sensors are electrically connected to the microprocessor; and an inverter control module, one end of the inverter control module is electrically connected to the microprocessor, and one end of the inverter control module is electrically connected to at least one The inverter is electrically connected to at least one fluid pump; wherein the microprocessor has a structure of an energy-saving protection module, including: a constant temperature module, a constant pressure module, a differential temperature module, and a differential pressure module, which controls the fluid pump to perform energy-saving protection under constant temperature, constant pressure, differential temperature, and differential pressure states; wherein the inverter control module has a PID controller, which activates a set point parameter, sets the target value and time value of the PID control module, and the operation feedback of the inverter. The inverter control module generates an error correction parameter by combining the set point parameter with the feedback adjustment time/variable, and then performs a compensation parameter, and calculates the voltage value of the output INV by the compensation parameter. The inverter control module reads back the temperature parameters of a plurality of temperature sensors from the output voltage value of the INV, or reads back the pressure parameters of a plurality of pressure sensors and adjusts the time/variable; wherein, the constant temperature module and a constant pressure module, including: the target value of the PID control module is sv, after each feedback, the temperature parameters of the plurality of temperature sensors are read back as Trv(1)~Trv(n), and the pressure parameters of the plurality of pressure sensors are read back as Prv(1)~Prv(n), wherein the temperature operation ratio op(T) is equal to sv/Trv(n), wherein the pressure operation ratio op(P) is equal to sv/Prv(n), wherein the minimum setting The output is Vmin=0.7; through each feedback, when the temperature operation ratio op(T) is less than or equal to ≦Vmin, or when the pressure operation ratio op(P) is less than or equal to ≦Vmin, the PID control module generates a reaction time value T(n) within Time1 second, and changes the inverter control module to output 90%~99% at a time to accelerate the fluid pump speed; through each feedback, when 0.8≧the temperature operation ratio op(T)>0.7 When 0.8≧the pressure operation ratio op(P)>0.7, the PID control module generates a reaction time value T(n) of Time2 seconds, and changes the inverter control module to output 80%~89% at a time to accelerate the fluid pump speed; through each feedback, when 0.9≧the temperature operation ratio op(T)>0.8, or when 0.9≧the pressure operation ratio op(P)>0.8, the PID control module generates a reaction time value T(n) of Time2 seconds. The value T(n) is Time3 seconds, the inverter control module output is changed to 80%~89% at a time, accelerating the fluid pump speed; through each feedback, when 1.0≧the temperature operation ratio op(T)>0.9, or when 1.0≧the pressure operation ratio op(P)>0.9, the PID control module generates a reaction time value T(n) of Time4 seconds, and the inverter control module output is changed to 80%~89% at a time, accelerating the fluid pump Speed; through each feedback, when the temperature operation ratio op(T)>1, or when the pressure operation ratio op(P)>1, the PID control module generates a reaction time value T(n) of Time5 seconds, changes the inverter control module to output 70% at a time, and accelerates the fluid pump speed; and the PID control module generates a reaction time value T(n) of Time1≧Time2≧Time3≧Time4≧Time5. A linear control system for a fluid pump as described in claim 1, wherein the fluid pump has a pump for controlling fluid transmission, and the fluid pump is selected from a compressor, a chilled water pump, a cooling water pump, and a water pump; and the inverter control module is a PID controller having a function of setting the output frequency range of the inverter, wherein the PID controller (proportional-integral-derivative controller) is composed of a proportional unit, an integral unit, and a derivative unit. A linear control system for a fluid pump as described in claim 1, wherein the thermostatic module detects the difference range between a first ambient temperature to be controlled and a first preset thermostatic temperature through the plurality of temperature sensors, and when the difference range between the first ambient temperature to be controlled and the first preset thermostatic temperature is greater than 0, the thermostatic module controls the inverter to drive the fluid pump in a frequency reduction state through the inverter control module, and when the difference range between the first ambient temperature to be controlled and the first preset thermostatic temperature is less than 0, the thermostatic module controls the inverter to drive the fluid pump in an frequency increase state through the inverter control module. The constant pressure module detects the difference between the fluid pressure of a first environment to be controlled and a first preset constant pressure fluid pressure through the plurality of pressure sensors. When the difference between the fluid pressure of the first environment to be controlled and the first preset constant pressure fluid pressure is greater than the difference between the fluid pressure of the first environment to be controlled and the first preset constant pressure fluid pressure, the constant pressure module detects the difference between the fluid pressure of the first environment to be controlled and the first preset constant pressure fluid pressure. When the pressure of the fluid in the first controlled environment is less than 0, the constant pressure module controls the frequency converter to drive the fluid pump in the frequency conversion state through the frequency converter control module, and when the difference between the fluid pressure of the first controlled environment and the fluid pressure of the first preset constant pressure is less than 0, the constant pressure module controls the frequency converter through the frequency converter control module. The fluid pump is driven in the frequency-up state; the temperature difference module detects the difference range between the difference temperature of a second environment temperature to be controlled and a third environment temperature to be controlled through the plurality of temperature sensors. When the difference range between the difference temperature of the second environment temperature to be controlled and the third environment temperature to be controlled is greater than 0, the temperature difference module controls the frequency converter to drive the fluid pump in the frequency-down state through the frequency converter control module, and when the difference range between the environment temperature to be controlled and the preset constant temperature is less than 0, the constant temperature module controls the frequency converter to drive the fluid pump in the frequency-up state through the frequency converter control module. ; and the differential pressure module detects the difference range between the fluid pressure of a second environment to be controlled and the fluid pressure of a third environment to be controlled through the plurality of pressure sensors. When the difference range between the fluid pressure of the second environment to be controlled and the fluid pressure of the third environment to be controlled is greater than 0, the constant temperature module controls the inverter to drive the fluid pump in a frequency reduction state through the inverter control module, and when the difference range between the fluid pressure of the second environment to be controlled and the fluid pressure of the third environment to be controlled is less than 0, the constant temperature module controls the inverter to drive the fluid pump in a frequency increase state through the inverter control module. A linear control system for a fluid pump as described in claim 1, further comprising: an alarm module, which has the function of sending an abnormal alarm through the alarm module when detecting that the state of the temperature sensor is abnormal; a shunt switch module, which has the function of starting the fluid pump to switch from energy-saving operation to mains operation when detecting that the state of the temperature sensor is abnormal; and a circuit board fault module, which starts the shunt switch module to switch the fluid pump from energy-saving operation to mains operation if the circuit board fault module determines that the circuit board is faulty. A linear control system for a fluid pump as described in claim 1, wherein the temperature differential module and the pressure differential module include: the differential target value of the PID control module is △sv, after each feedback, the temperature differential parameters of the plurality of temperature sensors are read back as △Trv(1)~△Trv(n), and the pressure differential parameters of the plurality of pressure sensors are read back as △Prv(1)~△Prv(n), wherein the temperature differential operation ratio △op(T) is equal to △sv/△Trv(n), wherein the pressure differential operation ratio △op(P) is equal to △sv/△Prv(n), wherein the minimum setting output is Vmin= 0.7; through each feedback, when the temperature difference operation ratio △op(T) is less than or equal to ≦Vmin, or when the pressure difference operation ratio op(P) is less than or equal to ≦Vmin, the PID control module generates a reaction time value T(n) within Time6 seconds, and changes the inverter control module to output 90%~99% at a time to accelerate the fluid pump speed; through each feedback, when 0.8≧the temperature difference operation ratio △op(T)>0.7, or when 0.8≧the pressure difference operation ratio △op(P)>0.7, the PID control module generates a reaction time value T(n) within Time7 seconds, and changes The inverter control module is changed to output 80%~89% at a time to accelerate the speed of the fluid pump; through each feedback, when 0.9≧the temperature difference operation ratio △op(T)>0.8, or when 0.9≧the pressure difference operation ratio △op(P)>0.8, the PID control module generates a reaction time value T(n) of Time8 seconds, and the inverter control module is changed to output 80%~89% at a time to accelerate the speed of the fluid pump; through each feedback, when 1.0≧the temperature difference operation ratio △op(T)>0.9, or when 1.0≧the pressure difference operation ratio △op(P)>0.9, the PID control module generates a reaction time value T(n) of Time8 seconds, and the inverter control module is changed to output 80%~89% at a time to accelerate the speed of the fluid pump; through each feedback, when 1.0≧the temperature difference operation ratio △op(T)>0.9, or when 1.0≧the pressure difference operation ratio △op(P)>0.9, the PID control module generates a reaction time value T(n) of Time8 seconds, and the inverter control module is changed to output 80%~89% at a time to accelerate the speed of the fluid pump The control module generates a reaction time value T(n) of Time9 seconds, changes the inverter control module to output 80%~89% at a time, and accelerates the fluid pump speed; through each feedback, when the temperature difference operation ratio op(T)>1, or when the pressure difference operation ratio op(P)>1, the PID control module generates a reaction time value T(n) of Time10 seconds, changes the inverter control module to output 70% at a time, and accelerates the fluid pump speed; and the PID control module generates a reaction time value T(n) of Time6≧Time7≧Time8≧Time9≧Time10. A linear control system for a fluid pump as described in claim 1, wherein the PID control module generates a reaction time value T(n), Time1 is 4 seconds, Time2 is 3 seconds, Time3 is 2 seconds, Time4 is 1 second, Time5 is 0.5 seconds, Time6 is 4 seconds, Time7 is 3 seconds, Time8 is 2 seconds, Time9 is 1 second, and Time10 is 0.5 seconds. A linear control method for a fluid pump, comprising: using a microprocessor located on a circuit board; using at least one sensor selected from a plurality of temperature sensors or a plurality of pressure sensors, wherein the plurality of temperature sensors are electrically connected to the microprocessor, or the plurality of pressure sensors are electrically connected to the microprocessor; and using an inverter control module, wherein one end of the inverter control module is electrically connected to the microprocessor, and one end of the inverter control module is electrically connected to the microprocessor. At least one inverter is electrically connected to at least one fluid pump; the microprocessor is used to have a structure of an energy-saving protection module, including: a constant temperature module, a constant pressure module, a differential temperature module, and a differential pressure module, to control the fluid pump to perform energy-saving protection under constant temperature, constant pressure, differential temperature, and differential pressure states; and the inverter control module is used to have a PID controller to start a set point parameter, set the target value, time value, and operation time of the PID control module, and the inverter. The inverter control module generates an error correction parameter by combining the set point parameter with the feedback adjustment time/variable, and then performs a compensation parameter, and calculates the voltage value of the output INV by the compensation parameter. The inverter control module reads back the temperature parameters of a plurality of temperature sensors or reads back the pressure parameters of a plurality of pressure sensors from the output voltage value of the INV to adjust the time/variable; wherein, the constant is used. The temperature module and the constant pressure module include: the target value of the PID control module is sv, after each feedback, the temperature parameters of the plurality of temperature sensors are read back as Trv(1)~Trv(n), and the pressure parameters of the plurality of pressure sensors are read back as Prv(1)~Prv(n), wherein the temperature operation ratio op(T) is equal to sv/Trv(n), wherein the pressure operation ratio op(P) is equal to sv/Prv(n), wherein the minimum setting The fixed output is Vmin=0.7; when the temperature operation ratio op(T)≦Vmin, or when the pressure operation ratio op(P) is less than or equal to ≦Vmin, the PID control module generates a reaction time value T(n) within 1 second, and changes the inverter control module to output 90%~99% at a time to accelerate the fluid pump speed; when 0.8≧the temperature operation ratio op(T)>0.7 ... , or when 0.8≧the pressure operation ratio op(P)>0.7, the PID control module generates a reaction time value T(n) of Time2 seconds, converting the inverter control module to output 80%~89% at a time to accelerate the fluid pump speed; using each feedback, when 0.9≧the temperature operation ratio op(T)>0.8, or when 0.9≧the pressure operation ratio op(P)>0.8, the PID control module generates a reaction time value T (n) is Time3 seconds, the inverter control module output is changed to 80%~89% at a time, accelerating the fluid pump speed; through each feedback, when 1.0≧the temperature operation ratio op(T)>0.9, or when 1.0≧the pressure operation ratio op(P)>0.9, the PID control module generates a reaction time value T(n) is Time4 seconds, the inverter control module output is changed to 70%~79% at a time, accelerating the fluid pump speed ; Using each feedback, when the temperature operation ratio op(T)>1, or when the pressure operation ratio op(P)>1, the PID control module generates a reaction time value T(n) of Time5 seconds, changes the inverter control module to output 70% at a time, and accelerates the fluid pump speed; and Using the PID control module, the reaction time value T(n) is Time1≧Time2≧Time3≧Time4≧Time5. A linear control method for a fluid pump as described in claim 7, wherein the temperature differential module and the pressure differential module are used, including: using the differential target value of the PID control module as △sv, after each feedback, reading back the temperature differential parameters of the plurality of temperature sensors as △Trv(1)~△Trv(n), reading back the pressure differential parameters of the plurality of pressure sensors as △Prv(1)~△Prv(n), wherein the temperature differential operation ratio △op(T) is equal to △sv/△Trv(n), wherein the pressure differential operation ratio △op(P) is equal to △sv/△Prv(n), wherein the minimum setting output is Vmin=0. 7; After each feedback, when the temperature difference operation ratio △op(T) is less than or equal to ≦Vmin, or when the pressure difference operation ratio op(P) is less than or equal to ≦Vmin, the PID control module generates a reaction time value T(n) within Time6 seconds, and changes the inverter control module to output 90%~99% at a time to accelerate the fluid pump speed; After each feedback, when 0.8≧the temperature difference operation ratio △op(T)>0.7, or when 0.8≧the pressure difference operation ratio △op(P)>0.7, the PID control module generates a reaction time value T(n) within Time7 seconds, and changes The inverter control module outputs 80%~89% at a time to accelerate the speed of the fluid pump; through each feedback, when 0.9≧the temperature difference operation ratio△op(T)>0.8, or when 0.9≧the pressure difference operation ratio△op(P)>0.8, the PID control module generates a reaction time value T(n) within Time8 seconds, and changes the inverter control module to output 80%~89% at a time to accelerate the speed of the fluid pump; through each feedback, when 1.0≧the temperature difference operation ratio△op(T)>0.9, or when 1.0≧the pressure difference operation ratio△op(P)>0.9, the PID control module generates a reaction time value T(n) within Time8 seconds, and changes the inverter control module to output 80%~89% at a time to accelerate the speed of the fluid pump; through each feedback, when 1.0≧the temperature difference operation ratio△op(T)>0.9, or when 1.0≧the pressure difference operation ratio△op(P)>0.9, the PID control module generates a reaction time value T(n) within Time8 seconds, and changes the inverter control module to output 80%~89% at a time to accelerate the speed of the fluid pump The control module generates a reaction time value T(n) within Time9 seconds, and changes the inverter control module to output 80%~89% at a time to accelerate the fluid pump speed; through each feedback, when the temperature difference operation ratio op(T)>1, or when the pressure difference operation ratio op(P)>1, the PID control module generates a reaction time value T(n) within Time10 seconds, and changes the inverter control module to output 70% at a time to accelerate the fluid pump speed; and using the PID control module, the reaction time value T(n) is Time6≧Time7≧Time8≧Time9≧Time10. A linear control method for a fluid pump as described in claim 8, wherein the PID control module generates a reaction time value T(n), Time1 is 4 seconds, Time2 is 3 seconds, Time3 is 2 seconds, Time4 is 1 second, Time5 is 0.5 seconds, Time6 is 4 seconds, Time7 is 3 seconds, Time8 is 2 seconds, Time9 is 1 second, and Time10 is 0.5 seconds.