CN207196835U - The ladder cooling control system of grain special air conditioner - Google Patents
The ladder cooling control system of grain special air conditioner Download PDFInfo
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- CN207196835U CN207196835U CN201721143049.8U CN201721143049U CN207196835U CN 207196835 U CN207196835 U CN 207196835U CN 201721143049 U CN201721143049 U CN 201721143049U CN 207196835 U CN207196835 U CN 207196835U
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Abstract
The ladder cooling control system of grain special air conditioner of the present utility model, master control borad is connected between evaporator and Electron pressure regulating valve, master control borad gathers temperature and leaving air temp sensor in silo by return air temperature sensor and gathers evaporator refrigerant temperature, it is sent to subtraction circuit and draws temperature difference, temperature difference is sent into window circuit three Grads threshold of progress again to compare, comparative result is sent into single-chip microcomputer, single-chip microcomputer exports two-way pwm control signal to the drive circuit of Electron pressure regulating valve after carrying out analysis calculating, control Electron pressure regulating valve aperture carrys out the pressure of control piper, and then control to adjust the evaporating temperature of refrigerant.The utility model is skillfully constructed, is simple in construction, make the cold wind temperature that air-conditioner set exports with temperature progress 1/2,2/3, the decline of full speed staged in silo, and remain at the critical point range of condensation, do not bear water in equipment running process air-conditioner set so as to reach or bear water less, silo long-term use reaches the effect that water conservation is guaranteed the quality.
Description
Technical field
It the utility model is related to the ladder cooling control system of silo falling temperature technique field, particularly grain special air conditioner.
Background technology
The design evaporating temperature of traditional common air-conditioning is usually 5-6 degree, and regulation temperature is the air quantity and wind by pressure fan
Speed is completed, it is such be designed to can fast cooling and dehumidifying, human body cooling feeling is preferable, but be for silo cooling
The defects of larger, reason are as follows：1st, silo or grain heap fast cooling easily cause explosion problem inside Cracked Rice cereal-granules；
2nd, the silo to be cooled for a long time using common air-conditioning causes grain excessively to dry because grain moisture content is largely lost in, and causes processing quality
Decline, be mainly reflected in paddy storehouse, because top layer paddy is excessively dried, broken kernel rate is higher etc. during processing；3rd, for a long time using general
The silo of logical air-conditioning temperature-reducing can cause grain moisture content to be largely lost in, and reduce grain weight, to direct caused by purchasing enterprise
Lose larger.
Therefore the utility model provides a kind of new scheme to solve this problem.
Utility model content
In view of the deficienciess of the prior art, the utility model purpose is to provide the ladder cooling control of grain special air conditioner
System, the cold wind temperature that air-conditioner set exports can be allowed with temperature step formula decline in silo, and remain at condensation and face
Boundary's point range, silo long-term use reach the effect that water conservation is guaranteed the quality.
To achieve these goals, the utility model is to realize by the following technical solutions：Grain special air conditioner
Ladder cooling control system, including compressor, condenser, fluid reservoir, evaporator, low-voltage tube, high-voltage tube, relief tube, electronics pressure
Force regulating valve, it is characterised in that master control borad is connected between evaporator and Electron pressure regulating valve, master control borad passes through return air temperature
Temperature and leaving air temp sensor collection evaporator refrigerant temperature in sensor collection silo are spent, subtraction circuit is sent to and draws temperature
Difference, then temperature difference is sent into window circuit three Grads threshold of progress and compared, comparative result is sent into single-chip microcomputer, and single-chip microcomputer is analyzed
Two-way pwm control signal is exported after calculating to the drive circuit of Electron pressure regulating valve, control Electron pressure regulating valve aperture to come
The pressure of control piper, and then the evaporating temperature of refrigerant is controlled to adjust, make the cold wind temperature that air-conditioner set exports with silo
Temperature step formula declines.
Preferably, the return air temperature sensor（10）For model DS18B20 temperature sensor P1, leaving air temp passes
Sensor（11）For the thermistor Rt1 of negative temperature coefficient, subtraction circuit is made up of operational amplifier A R1 for core, window circuit
It is made up of operational amplifier A R2, AR3, AR4 for core.
Preferably, thermistor Rt1 one end connection ground, thermistor Rt1 other end connection resistance R1 one end, connect
Ground electric capacity C1 one end, grounding resistance R2 one end, resistance R3 one end, resistance the R1 other end connection power supply+5V, resistance R3
Other end difference concatenation operation amplifier AR1 inverting input, ground capacity C2 one end, resistance R4 one end, resistance
R4 other end concatenation operation amplifier AR1 output end, resistance R6 one end, the temperature sensor P1 connection of pin 1 ground,
Temperature sensor the P1 connection of pin 3 power supply+5V, temperature sensor P1 pin 2 connect resistance R5 one end respectively, computing is put
Big device AR1 in-phase input end, resistance the R5 other end connection power supply+5V, operational amplifier A R1 power end connection power supply+
5V, operational amplifier A R1 ground terminal connection ground.
Preferably, the window circuit includes operational amplifier A R2, AR3, AR4, operational amplifier A R2, AR3, AR4
Inverting input connection resistance R6 the other end, operational amplifier A R4 in-phase input end connection resistance R10 one end, electricity
Resistance R9 one end, resistance R10 other end connection ground, the operational amplifier A R3 in-phase input end connection resistance R9 other end,
Resistance R8 one end, the operational amplifier A R2 in-phase input end connection resistance R8 other end, resistance R7 one end, resistance R7
Other end connection power supply+5V, operational amplifier A R2, AR3, AR4 output end connects the different I/O mouths of single-chip microcomputer respectively.
Preferably, the single-chip microcomputer is single-chip microcomputers of the model EM78P418 with PWM mouths, and it is according to the comparison of window circuit
As a result, the pwm control signal of two-way difference pulse duty factor is exported to the driving of Electron pressure regulating valve 9 after carrying out analysis calculating
Circuit, control the start and stop of Electron pressure regulating valve motor, rotating so as to control the unlatching of Electron pressure regulating valve 9, close and
Aperture, make cold wind temperature with temperature progress 1/2,2/3, the decline of full speed staged in silo.
The utility model is skillfully constructed, is simple in construction, and silo is gathered using return air temperature sensor, leaving air temp sensor
Interior temperature and evaporator refrigerant temperature, temperature difference is drawn through subtraction circuit, then temperature difference is sent into window circuit and carries out three gradients
Threshold value compares, and comparative result is sent into single-chip microcomputer, the pwm control signal driving electronics of single-chip microcomputer output two-way difference pulse duty factor
The rotating of the motor of pressure-regulating valve and aperture carry out the pressure of control piper, and then control to adjust the evaporating temperature of refrigerant, make
The cold wind temperature of air-conditioner set output remains at knot with temperature progress 1/2,2/3, the decline of full speed staged in silo
Reveal critical point range, do not bear water in equipment running process air-conditioner set so as to reach or bear water less, silo long-term use reaches guarantor
The effect that water is guaranteed the quality.
Brief description of the drawings
Fig. 1 is the utility model structure diagram.
Fig. 2 is the utility model main circuit link block figure.
Fig. 3 is the utility model main circuit catenation principle figure.
Embodiment
For about of the present utility model foregoing and other technology contents, feature and effect, it is following coordinate with reference to figures 1 through
Fig. 3 is in the detailed description of embodiment, can clearly present.The structure content being previously mentioned in following examples, it is to say
Bright book accompanying drawing is reference.
Each exemplary embodiment of the present utility model is described below with reference to accompanying drawings.
Embodiment one, the ladder cooling control system of grain special air conditioner, including compressor 1, condenser 2, fluid reservoir 3,
Evaporator 4, low-voltage tube 6, high-voltage tube 7, relief tube 8, Electron pressure regulating valve 9, evaporator 4 and Electron pressure regulating valve 9 it
Between be connected with master control borad 5, master control borad 5 gathers temperature and leaving air temp sensor 11 in silo by return air temperature sensor 10 and adopted
Collect the refrigerant temperature of evaporator 4, the voltage signal that both are converted to temperature signal equal proportion is sent to subtraction circuit progress subtraction fortune
Calculation draws temperature difference, then temperature difference is sent into window circuit three Grads threshold of progress and compared, and comparative result is sent into single-chip microcomputer, monolithic
Machine exports the pwm control signal of two-way difference pulse duty factor to the driving electricity of Electron pressure regulating valve 9 after carrying out analysis calculating
Road, control the rotating of the motor of Electron pressure regulating valve 9 and aperture to carry out the pressure of control piper, and then control to adjust refrigerant
Evaporating temperature, make the cold wind temperature that air-conditioner set exports with temperature progress 1/2,2/3, the decline of full speed staged in silo.
Embodiment two, on the basis of embodiment one, when evaporator air outlet temperature changes, air outlet temperature passes
Sensor, which is that the thermistor Rt1 of negative temperature coefficient resistance is inversely proportional, to change, so as to resistance R1 and thermistor Rt1 groups
Into bleeder circuit voltage change, i.e., through electric capacity C1, resistance R2 and resistance R3, electric capacity C2 form rc filter circuit,
The voltage that operational amplifier A R1 inverting inputs are sent to after filtering clutter interference changes, when temperature changes in silo
When, return air temperature sensor is that the voltage of model DS18B20 temperature sensor P1 outputs changes, its temperature-measuring range
For -55 DEG C ~+125 DEG C, precision is high, strong antijamming capability, and the temperature sensor P1 connection of pin 1 ground, temperature sensor P1's draws
Pin 3 connects power supply+5V, and temperature sensor P1 pin 2 send digital temperature information after pull-up resistor R5 for signal output part
To operational amplifier A R1 in-phase input end, operational amplifier A R1 carries out subtraction, and scaling by feedback resistance R4
After export difference voltage, operational amplifier A R1 power end connection power supply+5V, operational amplifier A R1 ground terminal connection ground.
Embodiment three, on the basis of embodiment one, difference signals are carried out three Grads threshold ratios by the window circuit
Compared with comparative result is sent into single-chip microcomputer, including operational amplifier A R2, AR3, AR4, and operational amplifier A R2, AR3, AR4's is anti-phase
Input passes through resistance R6 connection temperature signals, operational amplifier A R2, AR3, AR4 in-phase input end connection resistance R7, electricity
R8, resistance R9, the bleeder circuit of resistance R10 compositions are hindered, when the temperature difference is higher than+2 DEG C of degree of 6 DEG C of evaporating temperature, operational amplifier A R4
Output end output significant level low level arrive the I/O mouths for connecing single-chip microcomputer, single-chip microcomputer carries out output two-way pulse after analysis calculating
The pwm control signal of 50% dutycycle controls the motor of Electron pressure regulating valve 9 to the drive circuit of Electron pressure regulating valve 9
Rotate forward, aperture reaches 1/2 stopping of valve master switch, is cooled；When the temperature difference is higher than+4 DEG C of degree of 6 DEG C of evaporating temperature, computing
Amplifier AR3 output end output significant level low level exports to the I/O mouths for connecing single-chip microcomputer, single-chip microcomputer after carrying out analysis calculating
The pwm control signal of the dutycycle of two-way difference pulse 60% controls electron pressure to adjust to the drive circuit of Electron pressure regulating valve 9
The rotating forward of the motor of valve 9 is saved, aperture reaches 2/3 stopping of valve master switch, cooled；Spent when the temperature difference is higher than 6 DEG C of evaporating temperature+
At 6 DEG C, operational amplifier A R2 output end output significant level low level is analyzed to the I/O mouths for connecing single-chip microcomputer, single-chip microcomputer
The high level pwm control signal of two-way 100% is exported after calculating to the drive circuit of Electron pressure regulating valve 9, controls electron pressure
The rotating forward of the motor of regulating valve 9, valve wide open, carry out full speed cooling.
Embodiment three, on the basis of embodiment one, the single-chip microcomputer is monolithics of the model EM78P418 with PWM mouths
Machine, it export after analysis calculating the pwm control signal of two-way difference pulse duty factor according to the comparative result of window circuit
To the drive circuit of Electron pressure regulating valve 9, the driving electricity of the single-chip microcomputer output pwm signal control motor of Electron pressure regulating valve 9
Road is prior art, therefore is no longer described in detail, and controls the start and stop of the motor of Electron pressure regulating valve 9, rotating so as to controlling electron pressure
Unlatching, closing and the aperture of regulating valve 9, make cold wind temperature with temperature progress 1/2,2/3, the decline of full speed staged in silo.
The utility model is when being used, and when evaporator air outlet temperature changes, air outlet temperature passes
Sensor, which is that the thermistor Rt1 of negative temperature coefficient resistance is inversely proportional, to change, and is sent to operational amplifier A R1 anti-phase inputs
The voltage at end changes, and when temperature changes in silo, return air temperature sensor is model DS18B20 temperature
The voltage of sensor P1 outputs changes, i.e. operational amplifier A R1 homophase input terminal voltage changes, operational amplifier
AR1 carries out subtraction, and by the scaling rear output temperature difference voltages of feedback resistance R4, is sent into window circuit afterwards and carries out
Three Grads threshold compare, operational amplifier A R2, AR3, AR4 in-phase input end connection resistance R7, resistance R8, resistance R9, electricity
The bleeder circuit of R10 compositions is hindered, when the temperature difference is higher than+2 DEG C of degree of 6 DEG C of evaporating temperature, operational amplifier A R4 output end output has
Imitate level low level and carry out the PWM of the dutycycle of output two-way pulse 50% after analysis calculating to the I/O mouths for connecing single-chip microcomputer, single-chip microcomputer
Control signal controls the rotating forward of the motor of Electron pressure regulating valve 9, aperture reaches valve to the drive circuit of Electron pressure regulating valve 9
The 1/2 of door master switch stops, and is cooled；When the temperature difference is higher than+4 DEG C of degree of 6 DEG C of evaporating temperature, operational amplifier A R3 output
End output significant level low level exports two-way difference pulse to the I/O mouths for connecing single-chip microcomputer, single-chip microcomputer after carrying out analysis calculating
The pwm control signal of 60% dutycycle controls the motor of Electron pressure regulating valve 9 to the drive circuit of Electron pressure regulating valve 9
Rotate forward, aperture reaches 2/3 stopping of valve master switch, is cooled；When the temperature difference is higher than+6 DEG C of degree of 6 DEG C of evaporating temperature, computing
Amplifier AR2 output end output significant level low level exports to the I/O mouths for connecing single-chip microcomputer, single-chip microcomputer after carrying out analysis calculating
The high level pwm control signal of two-way 100% controls the motor of Electron pressure regulating valve 9 to the drive circuit of Electron pressure regulating valve 9
Rotating forward, valve wide open, carry out full speed cooling.
Claims (5)
1. the ladder cooling control system of grain special air conditioner, including compressor（1）, condenser（2）, fluid reservoir（3）, evaporator
（4）, low-voltage tube（6）, high-voltage tube（7）, relief tube（8）, Electron pressure regulating valve（9）, it is characterised in that in evaporator（4）With
Electron pressure regulating valve（9）Between be connected with master control borad（5）, master control borad（5）Pass through return air temperature sensor（10）Gather silo
Interior temperature, leaving air temp sensor（11）Gather evaporator（4）Refrigerant temperature, it is sent to subtraction circuit and draws temperature difference, then by temperature
Degree difference, which is sent into window circuit and carries out three Grads threshold, to be compared, and comparative result is sent into single-chip microcomputer, and single-chip microcomputer carries out defeated after analysis calculating
Go out two-way pwm control signal to Electron pressure regulating valve（9）Drive circuit, control Electron pressure regulating valve（9）Aperture is controlled
The pressure on tubulation road, and then the evaporating temperature of refrigerant is controlled to adjust, make the cold wind temperature that air-conditioner set exports with warm in silo
Staged is spent to decline.
2. the ladder cooling control system of grain special air conditioner according to claim 1, it is characterised in that the return air
Temperature sensor（10）For model DS18B20 temperature sensor P1, leaving air temp sensor（11）For negative temperature coefficient
Thermistor Rt1, subtraction circuit are made up of operational amplifier A R1 for core, window circuit by operational amplifier A R2, AR3,
AR4 forms for core.
3. the ladder cooling control system of grain special air conditioner according to claim 1 or 2, it is characterised in that temperature-sensitive electricity
Hinder Rt1 one end connection ground, thermistor Rt1 other end connection resistance R1 one end, ground capacity C1 one end, ground connection electricity
Hinder R2 one end, resistance R3 one end, resistance the R1 other end connection power supply+5V, resistance R3 other end difference concatenation operation
Amplifier AR1 inverting input, ground capacity C2 one end, resistance R4 one end, resistance R4 other end concatenation operation are put
Big device AR1 output end, resistance R6 one end, the temperature sensor P1 connection of pin 1 ground, temperature sensor P1 pin 3 connect
Power supply+5V is met, temperature sensor P1 pin 2 connects resistance R5 one end, operational amplifier A R1 in-phase input end respectively,
Resistance the R5 other end connection power supply+5V, operational amplifier A R1 power end connection power supply+5V, operational amplifier A R1 ground
End connection ground.
4. the ladder cooling control system of grain special air conditioner according to claim 1 or 2, it is characterised in that the window
Mouth circuit includes operational amplifier A R2, AR3, AR4, operational amplifier A R2, AR3, AR4 inverting input connection resistance R6
The other end, operational amplifier A R4 in-phase input end connection resistance R10 one end, resistance R9 one end, resistance R10's is another
One end connection ground, the operational amplifier A R3 in-phase input end connection resistance R9 other end, resistance R8 one end, operation amplifier
The device AR2 in-phase input end connection resistance R8 other end, resistance R7 one end, resistance R7 other end connection power supply+5V, fortune
The output end for calculating amplifier AR2, AR3, AR4 connects the different I/O mouths of single-chip microcomputer respectively.
5. the ladder cooling control system of grain special air conditioner according to claim 1, it is characterised in that the single-chip microcomputer
For single-chip microcomputers of the model EM78P418 with PWM mouths, it exports two according to the comparative result of window circuit after carrying out analysis calculating
The pwm control signal of road difference pulse duty factor is to Electron pressure regulating valve（9）Drive circuit, control Electron pressure regulating valve
（9）The start and stop of motor, rotating are so as to controlling Electron pressure regulating valve（9）Unlatching, closing and aperture, make cold wind temperature with
Temperature progress 1/2,2/3, full speed staged decline in silo.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721143049.8U CN207196835U (en) | 2017-09-07 | 2017-09-07 | The ladder cooling control system of grain special air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721143049.8U CN207196835U (en) | 2017-09-07 | 2017-09-07 | The ladder cooling control system of grain special air conditioner |
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| CN207196835U true CN207196835U (en) | 2018-04-06 |
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| CN201721143049.8U Active CN207196835U (en) | 2017-09-07 | 2017-09-07 | The ladder cooling control system of grain special air conditioner |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109831183A (en) * | 2019-03-27 | 2019-05-31 | 河南天硕机电设备工程有限公司 | A kind of signal filter circuit of grain air conditioner intelligent management system |
| CN109857041A (en) * | 2019-03-27 | 2019-06-07 | 河南天硕机电设备工程有限公司 | A kind of silo air conditioner intelligent management system |
| CN112594984A (en) * | 2020-12-11 | 2021-04-02 | 四川长虹空调有限公司 | Low-temperature grain depot air conditioner humidity control system and method |
-
2017
- 2017-09-07 CN CN201721143049.8U patent/CN207196835U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109831183A (en) * | 2019-03-27 | 2019-05-31 | 河南天硕机电设备工程有限公司 | A kind of signal filter circuit of grain air conditioner intelligent management system |
| CN109857041A (en) * | 2019-03-27 | 2019-06-07 | 河南天硕机电设备工程有限公司 | A kind of silo air conditioner intelligent management system |
| CN109857041B (en) * | 2019-03-27 | 2021-07-27 | 河南天硕机电设备工程有限公司 | Air conditioner intelligent management system for granary |
| CN109831183B (en) * | 2019-03-27 | 2023-06-13 | 宝鸡国瑞达新能源科技有限公司 | Signal filter circuit of intelligent management system of air conditioner for grains |
| CN112594984A (en) * | 2020-12-11 | 2021-04-02 | 四川长虹空调有限公司 | Low-temperature grain depot air conditioner humidity control system and method |
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