CN103499134A - Method for controlling temperature difference between front BRT air conditioner and back BRT air conditioner - Google Patents
Method for controlling temperature difference between front BRT air conditioner and back BRT air conditioner Download PDFInfo
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- CN103499134A CN103499134A CN201310425609.9A CN201310425609A CN103499134A CN 103499134 A CN103499134 A CN 103499134A CN 201310425609 A CN201310425609 A CN 201310425609A CN 103499134 A CN103499134 A CN 103499134A
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Abstract
The invention relates to a method for controlling temperature difference between a front BRT air conditioner and a back BRT air conditioner. The BRT air conditioners include two sets of independent overhead air conditioners, solenoid valves, connecting lines, a compressor, a generator, a manipulator and wiring harnesses, wherein the two sets of independent overhead air conditioners are arranged on the front portion of a passenger compartment and the back portion of the passenger compartment respectively. The method for controlling the front-back temperature difference of the BRT air conditioners includes the following steps: temperature sensors, the solenoid valves and control circuits are added in an original air conditioner circuit system; an air conditioner control system is utilized to carry out sampling, calculating, comparing and adjusting on the temperature at a front air return inlet and the temperature at a back air return inlet and controlling the front coolant solenoid valve, the back coolant solenoid valve and the compressor. When the temperature at the front air return inlet is 2 DEG C lower than that the temperature at the back air return inlet, the front air conditioner coolant solenoid valve is switched off, so that the refrigerating speed of the back air conditioner is increased. When the temperature at the front air return inlet is the same as the temperature at the back air return inlet, the front air conditioner coolant solenoid valve is switched on. When the temperature of the front air conditioner and the temperature of the back air conditioner reach the preset temperature, the compressor is switched off. Therefore, the method can ensure temperature balance in the passenger compartment of a BRT bus and enables passengers to take the BRT bus more comfortably.
Description
Technical field
The present invention relates to design and the manufacturing technology field of coach air conditioner, specifically, is the control method of the temperature difference before and after fast public traffic system (BRT) bus BRT air-conditioning used.
Background technology
China's city bus development in recent years is very fast, and intercity quick hinge and fast public traffic system (Bus Rapid Transit is called for short BRT) have been set up in many large-and-medium size cities.The fast public traffic system general vehicle commander of bus used reaches 18 meters, and in compartment, two idle calls are equipped with respectively to regulate the environment temperature in compartment in front and back, and these two air-conditionings are used a compressor simultaneously and controlled by an executor." BRT air-conditioning " of the present invention is the air-conditioning of the bus use of fast public traffic system.Due to the difference of the installation site of two air-conditionings and model, add before and after not the waiting and the difference of compartment insulation itself of passengers quantity in compartment, occur sometimes that in the running of bus rapid transit in the compartment, front and back, temperature differs larger.Because the BRT air-conditioning does not have the control for front and back air conditioner surroundings temperature, the temperature of air-conditioning unit controls that usually to take the return air temperature of main air-conditioning (front air-conditioning) be temperature controlled reference value, as long as the return air temperature of main air-conditioning (front air-conditioning) reaches the desired temperature of air conditioner manipulator, compressor of air conditioner just quits work, at this moment the environment temperature of secondary air-conditioning (rear air-conditioning) does not likely also reach the desired temperature (excess Temperature) of air conditioner manipulator, or the environment temperature of secondary air-conditioning (rear air-conditioning) has surpassed the desired temperature (temperature is too low) of air conditioner manipulator.In the collection to compartment temperature data before and after the BRT air-conditioning, find in recent years, in the running of quick public transport sometimes before and after temperature in compartment to differ 3～4 ℃.This comfortableness that passenger in compartment is taken can have a certain impact.
Summary of the invention
The object of the invention is to address the above problem, the control method of a kind of BRT air-conditioning front and back temperature difference is provided, it is processed and is controlled the return air temperature of two air-conditionings before and after the BRT air-conditioning, guarantee that the return air temperature error of two air-conditionings in front and back is within the scope of 2 ℃, thereby can guarantee the comfortableness that the fast public traffic system bus is taken.
For realizing above-mentioned purpose, the present invention has adopted following technical scheme.
The control method of the temperature difference before and after a kind of BRT air-conditioning, described BRT air-conditioning comprises be arranged on before and after compartment two groups independently roof-mounted air-condition and magnetic valve, connecting line, compressor, generator, executor and wire harness, it is characterized in that, to the control method of the temperature difference before and after described BRT air-conditioning be:
(1) increase temperature sensor, magnetic valve and the control circuit that is arranged on the front and back return air inlet in former air-condition circuits system, form new air-conditioner control system;
(2) with described air-conditioner control system, front and back air conditioner coolant magnetic valve and compressor of air conditioner are sampled, are calculated, compared and adjusted and control to the temperature of front and back roof-mounted air-condition return air inlet;
(3) temperature value that collects front return air inlet for air-conditioner when described air-conditioner control system is during lower than the information of 2 ℃ of rear return air inlet for air-conditioner temperature values, and air-conditioner control system closes the refrigerant magnetic valve of front roof-mounted air-condition; After having closed a way solenoid valve, whole refrigerants have just all entered rear roof-mounted air-condition, and the refrigerating speed of rear roof-mounted air-condition is accelerated;
(4) when the sampling temperature difference of front and back roof-mounted air-condition return air inlet when identical, under the control of described air-conditioner control system before the refrigerant magnetic valve of roof-mounted air-condition reopen;
(5) when the temperature of front and back roof-mounted air-condition return air inlet reaches the temperature of described air-conditioner control system setting, described compressor of air conditioner cuts out, thereby guarantees the equilibrium of fast public traffic system bus compartment temperature.
Further, described air-conditioner control system selects same model, with the temperature sensor of precision, that is: be arranged on before and after the model of temperature sensor of roof-mounted air-condition return air inlet should be consistent with precision, like this, to calculating, the comparison and just more accurate to the control of described refrigerant magnetic valve and compressor of the collection of temperature signal, parameter.
Before and after BRT air-conditioning of the present invention, the good effect of the control method of the temperature difference is:
(1) by increase temperature sensor, magnetic valve and the control circuit that is arranged on the front and back return air inlet in BRT air-conditioning primary circuit system, realize the independently control of roof-mounted air-condition of two groups of front and back.This control method is little to the change of primary circuit, cost is low, practical and easy enforcement.
(2) processed and controlled by the return air temperature to two air-conditionings before and after fast public traffic system (BRT) air-conditioning, before and after guaranteeing, the return air temperature error of two air-conditionings is within the scope of 2 ℃, effectively improve the unbalanced problem of temperature in the BRT compartment, thereby guaranteed the comfortableness that the fast public traffic system bus is taken.
(3) easily implement, easily the air-conditioning of existing fast public traffic system (BRT) is transformed.
The accompanying drawing explanation
The control circuit I that Fig. 1 is the control method of the temperature difference before and after BRT air-conditioning of the present invention.
The control circuit II that Fig. 2 is the control method of the temperature difference before and after BRT air-conditioning of the present invention.
The control circuit III that Fig. 3 is the control method of the temperature difference before and after BRT air-conditioning of the present invention.
Label in figure is respectively:
DCF1, front overhead type air conditioner coolant magnetic valve;
DCF2, rear roof-mounted air-condition refrigerant magnetic valve;
T1, front overhead type air-conditioning return air sensor;
T2, rear roof-mounted air-condition return air sensor.
The specific embodiment
Further illustrate the specific embodiment of the control method of the BRT air-conditioning of the present invention front and back temperature difference below in conjunction with accompanying drawing, but be noted that enforcement of the present invention is not limited to following embodiment.
The control method of the temperature difference before and after a kind of BRT air-conditioning, described BRT air-conditioning comprises be arranged on before and after compartment two groups independently roof-mounted air-condition and magnetic valve, connecting line, compressor, generator, executor and wire harness.Control method to the temperature difference before and after described BRT air-conditioning is:
(1) increase temperature sensor, magnetic valve and the control circuit that is arranged on the front and back return air inlet in former air-condition circuits system, form new air-conditioner control system.Described air-conditioner control system should select same model, with the temperature sensor of precision, that is: be arranged on before and after the model of temperature sensor of roof-mounted air-condition return air inlet should be consistent with precision, like this, to collection, the calculating of parameter, the comparison and just more accurate to the control of described refrigerant magnetic valve and compressor of temperature signal.
(2) with described air-conditioner control system, the temperature of front and back roof-mounted air-condition return air inlet is sampled, is calculated, compared and adjusted, air conditioner coolant magnetic valve and compressor of air conditioner before and after controlling with this.
(3) temperature value that collects front return air inlet for air-conditioner when described air-conditioner control system is during lower than the information of 2 ℃ of rear return air inlet for air-conditioner temperature values, and air-conditioner control system closes the refrigerant magnetic valve of front roof-mounted air-condition; After having closed a way solenoid valve, whole refrigerants have just all entered rear roof-mounted air-condition, and the refrigerating speed of rear roof-mounted air-condition is accelerated, and the temperature of rear roof-mounted air-condition return air inlet and the temperature of front overhead type return air inlet for air-conditioner are reached unanimity rapidly.
(4) when the sampling temperature difference of front and back roof-mounted air-condition return air inlet when identical, under the control of described air-conditioner control system before the refrigerant magnetic valve of roof-mounted air-condition reopen;
(5) when the temperature of front and back roof-mounted air-condition return air inlet reaches the temperature of described air-conditioner control system setting, under the control of described air-conditioner control system, described compressor of air conditioner cuts out.So just make the temperature of BRT front and back roof-mounted air-condition keep almost consistent, before and after having solved in the prior art, air-conditioning has the problem of the temperature difference, thereby guaranteed the equilibrium of fast public traffic system bus compartment temperature, guaranteed the comfortableness that the fast public traffic system bus is taken.
The control circuit that described in the control method of the temperature difference, air-conditioner control system adopts before and after BRT air-conditioning of the present invention is:
Referring to Fig. 1.By T1, R2 forms the reference potential (roof-mounted air-condition return air sensor T1 was reference potential VA in the past) of described air-conditioner control system comparator, by R1, T2 forms the comparison current potential (later roof-mounted air-condition return air sensor T2 is for comparing current potential VB) of described comparator, in the running of front and back roof-mounted air-condition, when the current potential of VB is worth higher than 2 ℃ of VA current potentials, described comparator output electronegative potential, make triode Q1 cut-off, relay J 1 disconnects, turn-off DCF2, now explanation: the temperature of T2 is than low 2 ℃ of the temperature of T1, should close DCF2, roof-mounted air-condition before refrigerant is all flowed to, make it accelerate cooling rate.When the temperature of the temperature of T1 and T2 is identical, comparator output high potential, make triode Q1 turn-on relay J1 adhesive, opens DCF2, makes rear roof-mounted air-condition continue refrigeration.
Referring to Fig. 2.By T2, R2 ' forms the reference potential (later roof-mounted air-condition return air sensor T2 is reference potential VA ') of described air-conditioner control system comparator, by R1 ', T1 forms the comparison current potential (the roof-mounted air-condition return air sensor was for comparing current potential VB ' in the past) of described comparator, in the running of front and back roof-mounted air-condition, when the current potential of VB ' is worth higher than 2 ℃ of VA ' current potentials, described comparator output electronegative potential, make triode Q1 cut-off, relay J 1 ' disconnects, turn-off DCF1, now explanation: the temperature of T1 is than low 2 ℃ of the temperature of T2, should close DCF1, roof-mounted air-condition after refrigerant is all flowed to, make it accelerate cooling rate.When the temperature of the temperature of T1 and T2 is identical, comparator output high potential, make triode Q1 turn-on relay J1 adhesive, opens DCF1, makes front roof-mounted air-condition continue refrigeration.
When the current potential of T1, T2 all reaches the current potential of described air-conditioner control system setting; described ac control circuit will be exported stopping signal to compressor, makes compressor (environment temperature in this explanation compartment has reached the temperature value that described air-conditioner control system sets) out of service.As long as while having a road return air sensor (T1 or T2) not reach the current potential of described air-conditioner control system setting, described compressor is operation always just, until the current potential of (T1 and T2) return air sensor all reaches the current potential that described air-conditioner control system is set, compressor just can be out of service.
Referring to Fig. 3.After described air-conditioner control system sets temperature value, in fact just set the current potential (reference potential of comparator) of variable potentiometer W on circuit, the reference potential of two-way comparator is comprised of W, R2, R3 and W, R7, R8 respectively, it is identical that the reference potential of two-way comparator (N3, N4) is wanted, and this just needs resistance R2=R7, the R3=R8 of resistance.
The comparison current potential of two-way comparator (N3, N4) is comprised of R1, T2 and R6, T1 respectively.The resistance of resistance is answered R1=R6, and while only having comparative voltage position (the 2# pin of N3, the 2# pin of N4) in comparator simultaneously higher than the reference potential in comparator, triode Q1 cut-off, disconnect the J1 relay, thereby stop compressor operating.As long as the comparison potential value that a road comparator is wherein arranged is lower than reference potential, triode Q1 conducting is all the time so worked compressor always.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the inventive method; can also make some improvement and modification, these improvement and modification also should be considered within the scope of protection of the present invention.
Claims (8)
1. the control method of the temperature difference before and after a BRT air-conditioning, described BRT air-conditioning comprises be arranged on before and after compartment two groups independently roof-mounted air-condition and magnetic valve, connecting line, compressor, generator, executor and wire harness, it is characterized in that, to the control method of the temperature difference before and after described BRT air-conditioning be:
(1) increase temperature sensor, magnetic valve and the control circuit that is arranged on the front and back return air inlet in former air-condition circuits system, form new air-conditioner control system;
(2) with described air-conditioner control system, front and back air conditioner coolant magnetic valve and compressor of air conditioner are sampled, are calculated, compared and adjusted and control to the temperature of front and back roof-mounted air-condition return air inlet;
(3) temperature value that collects front return air inlet for air-conditioner when described air-conditioner control system is during lower than the information of 2 ℃ of rear return air inlet for air-conditioner temperature values, and air-conditioner control system closes the refrigerant magnetic valve of front roof-mounted air-condition; After having closed a way solenoid valve, whole refrigerants have just all entered rear roof-mounted air-condition, and the refrigerating speed of rear roof-mounted air-condition is accelerated;
(4) when the sampling temperature difference of front and back roof-mounted air-condition return air inlet when identical, under the control of described air-conditioner control system before the refrigerant magnetic valve of roof-mounted air-condition reopen;
(5) when the temperature of front and back roof-mounted air-condition return air inlet reaches the temperature of described air-conditioner control system setting, described compressor of air conditioner cuts out, thereby guarantees the equilibrium of fast public traffic system bus compartment temperature.
2. the control method of the temperature difference before and after BRT air-conditioning according to claim 1, is characterized in that, described air-conditioner control system should select same model, with the temperature sensor of precision.
3. the control method of the temperature difference before and after BRT air-conditioning according to claim 1, it is characterized in that, a kind of control circuit that described air-conditioner control system adopts is: by front overhead type air-conditioning return air sensor (T1), resistance R 2 form described air-conditioner control system comparator reference potential---former roof-mounted air-condition return air sensor (T1) is reference potential VA, by resistance R 1, rear roof-mounted air-condition return air sensor (T2) forms the comparison current potential of described comparator---and later roof-mounted air-condition return air sensor (T2) is for comparing current potential VB, in the running of front and back roof-mounted air-condition, when relatively the current potential of current potential VB is worth higher than 2 ℃ of reference potential VA current potentials, described comparator output electronegative potential, make triode Q1 cut-off, relay J 1 disconnects, the pass roof-mounted air-condition refrigerant magnetic valve (DCF2) of having no progeny, now, the temperature of rear roof-mounted air-condition return air sensor (T2) is than low 2 ℃ of the temperature of front overhead type air-conditioning return air sensor (T1), should close rear roof-mounted air-condition refrigerant magnetic valve (DCF2), roof-mounted air-condition before refrigerant is all flowed to, its cooling rate is accelerated, the temperature difference of current roof-mounted air-condition return air sensor (T1) and rear roof-mounted air-condition return air sensor (T2) is in 2 ℃ the time, described comparator output high potential, make triode Q1 turn-on relay J1 adhesive, open rear roof-mounted air-condition refrigerant magnetic valve (DCF2), make rear roof-mounted air-condition continue refrigeration.
4. the control method of the temperature difference before and after BRT air-conditioning according to claim 1, it is characterized in that, a kind of control circuit that described air-conditioner control system adopts is: by rear roof-mounted air-condition return air sensor (T2), resistance R 2 ' forms the reference potential of described air-conditioner control system comparator---and later roof-mounted air-condition return air sensor (T2) is reference potential VA ', by resistance R 1 ', front overhead type air-conditioning return air sensor (T1) forms the comparison current potential of described comparator---and former roof-mounted air-condition return air sensor is for comparing current potential VB ', in the running of front and back roof-mounted air-condition, when relatively the current potential of current potential VB ' is worth higher than 2 ℃ of reference potential VA ' current potentials, described comparator output electronegative potential, make triode Q1 cut-off, relay J 1 ' disconnects, overhead type air conditioner coolant magnetic valve (DCF1) before turn-offing, now, the temperature of front overhead type air-conditioning return air sensor (T1) is than low 2 ℃ of the temperature of rear roof-mounted air-condition return air sensor (T2), should close front overhead type air conditioner coolant magnetic valve (DCF1), roof-mounted air-condition after refrigerant is all flowed to, its cooling rate is accelerated, the temperature difference of current roof-mounted air-condition return air sensor (T1) and rear roof-mounted air-condition return air sensor (T2) is in 2 ℃ the time, described comparator output high potential, make triode Q1 turn-on relay J1 adhesive, open front overhead type air conditioner coolant magnetic valve DCF1, make front roof-mounted air-condition continue refrigeration.
5. the control method of the temperature difference before and after BRT air-conditioning according to claim 4, it is characterized in that, when the current potential of the current roof-mounted air-condition return air sensor of described control circuit (T1), rear roof-mounted air-condition return air sensor (T2) all reaches the current potential of described air-conditioner control system setting, described ac control circuit will, to described compressor output stopping signal, make compressor out of service; When as long as front overhead type air-conditioning return air sensor (T1) or rear roof-mounted air-condition return air sensor (T2) have a road not reach the current potential of described air-conditioner control system setting, described compressor is operation always just, until the current potential of front overhead type air-conditioning return air sensor (T1) and rear roof-mounted air-condition return air sensor (T2) all reaches the current potential that described air-conditioner control system is set, described compressor just can be out of service.
6. the control method of the temperature difference before and after BRT air-conditioning according to claim 1, it is characterized in that, a kind of control circuit that described air-conditioner control system adopts is: after described air-conditioner control system sets temperature value, in fact just set the current potential of variable potentiometer W---the reference potential of comparator on circuit, the reference potential of two-way comparator is comprised of variable potentiometer W, resistance R 2, resistance R 3 and variable potentiometer W, resistance R 7, resistance R 8 respectively, it is identical that the reference potential of two-way comparator N3, N4 is wanted, and just needs resistance R2=R7, the R3=R8 of resistance.
7. the control method of the temperature difference before and after BRT air-conditioning according to claim 6, it is characterized in that, the comparison current potential of described comparator N3, N4 is comprised of resistance R 1, rear roof-mounted air-condition return air sensor (T2) and resistance R 6, front overhead type air-conditioning return air sensor (T1) respectively, the resistance of its resistance is answered R1=R6, the 2# pin of comparative voltage position in comparator---N3, the 2# pin of N4 are during simultaneously higher than the reference potential in described comparator, triode Q1 cut-off, disconnect relay J 1, thereby stop compressor operating.
8. the control method of the temperature difference before and after BRT air-conditioning according to claim 7, is characterized in that, described comparator N3, N4 if the comparison potential value that a road is wherein arranged lower than reference potential, triode Q1 conducting all the time, compressor is worked always.
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| CN105509389A (en) * | 2016-01-26 | 2016-04-20 | 南京西百客汽车空调有限公司 | Air conditioning system of automobile |
| CN105805884A (en) * | 2015-08-28 | 2016-07-27 | 北京海登赛思工业智能技术有限公司 | Temperature and humidity control method and control system for air conditioners in coating workshops |
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