CN107339783B - Dual-system air conditioner control system - Google Patents
Dual-system air conditioner control system Download PDFInfo
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- CN107339783B CN107339783B CN201710723801.4A CN201710723801A CN107339783B CN 107339783 B CN107339783 B CN 107339783B CN 201710723801 A CN201710723801 A CN 201710723801A CN 107339783 B CN107339783 B CN 107339783B
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Abstract
The invention discloses a double-system air conditioner control system which comprises a controller, an operation display interface, a signal detection unit and an electric execution part, wherein the input end of the controller is respectively connected with the output ends of the operation display interface and the signal detection unit, the output end of the controller is connected with the input end of the electric execution part, the operation display interface and the controller are in data communication, the signal detection unit comprises a return air temperature sensor, a coil pipe temperature sensor, an environment temperature sensor and an alarm circuit, and the electric execution part comprises an evaporation fan, a compressor A, a condensation fan A, a compressor B and a condensation fan B. The invention ensures that the dual system is started in a time-sharing way to reduce the starting power by using an intelligent and reliable control technology, and the single system is used for alternately working with one standby, and the evaporator is automatically defrosted when the dual system is in operation, thereby meeting the requirement of greatly adjusting the temperature of the cooled equipment or the space heating value variation range.
Description
Technical Field
The invention relates to the field of control systems of special refrigeration equipment, in particular to a double-system air conditioner control system.
Background
With the development of modern technology, special refrigeration equipment is widely applied, and at present, a variable frequency mode is generally adopted for refrigeration under the condition that the range of the variation of the heat productivity of the cooled equipment or space is large or the starting power of the air conditioner equipment is limited due to the limited capacity of a power supply.
The frequency conversion is to change the fixed power grid frequency into variable frequency by a frequency converter, when the compressor is started, the rotating speed is gradually changed from slow to fast, the impact on a power supply is reduced, when the temperature reaches the vicinity of a set value, the rotating speed of the compressor is reduced, the power and the refrigerating capacity are reduced, the temperature is maintained to be in the vicinity of the set value, the comfort and the energy conservation are better, and particularly, the direct current frequency conversion has the advantages of alternating current frequency conversion and simultaneously saves more electricity.
However, the existing market has no high-power variable frequency compressor, and the variable frequency is not suitable for the cooled equipment or the occasion with a large space heating value change range, the cooling capacity and the heat of the double-system air conditioner can be reduced or doubled, the air conditioner has a simple structure, common parts, good cost performance, good reliability and good electromagnetic compatibility, and a reasonable and reliable control method is very important for better enabling the double-system air conditioner to work more effectively.
Disclosure of Invention
The invention aims to make up the defects of the prior art, and provides a double-system air conditioner control system, which ensures that the double-system operation time-sharing starting is started to reduce starting power by an intelligent and reliable control technology, and a single system alternately works one by one, and an evaporator automatically defrost when the double-system operation is performed, so as to meet the requirement of temperature regulation of cooled equipment or space heating value variation range.
The technical scheme of the invention is as follows:
a double-system air conditioner control system is characterized in that: the intelligent control system comprises a controller, an operation display interface, a signal detection unit and an electric execution part, wherein the input end of the controller is respectively connected with the output ends of the operation display interface and the signal detection unit, the output end of the controller is connected with the input end of the electric execution part, the operation display interface is in data communication with the controller, the signal detection unit comprises a return air temperature sensor, a coil pipe temperature sensor, an environment temperature sensor and an alarm circuit, and the electric execution part comprises an evaporation fan, a compressor A, a condensation fan A, a compressor B and a condensation fan B.
The double-system air conditioner control system is characterized in that: the controller automatically controls the start and stop of a single system or a double system of the air conditioner according to the difference value between the detection value of the return air temperature sensor and the target temperature set by the operation display interface; when the temperature difference between the temperature of the return air inlet and the set target temperature is 2 ℃, the air-conditioning single systems alternately work, one air-conditioning single system is used, the other air-conditioning single system is standby, and the other air-conditioning single system is automatically switched to work when the abnormality of the one air-conditioning single system occurs; when the temperature difference between the temperature of the return air inlet and the set target temperature is 4 ℃, the air conditioner double systems work and start in a time-sharing mode so as to reduce the starting power.
The control method comprises the following steps:
t: return air inlet temperature, T0: setting temperature, T1: an external ambient temperature.
(1) When T is more than or equal to T0+2deg.C, refrigerating by an air conditioner single system, and when T is less than or equal to T0, stopping refrigerating;
when T is more than or equal to T0+4 ℃, the air conditioner double system is used for refrigerating, when T is less than T0+2 ℃, the air conditioner single system is used for refrigerating, and when T is less than or equal to T0, the refrigerating is stopped;
(2) heating by an air conditioner single system when T is less than or equal to T0-2 ℃, and stopping heating when T is more than or equal to T0;
heating by an air conditioner double system when T is less than or equal to T0-4 ℃, heating by an air conditioner single system when T is more than T0-2 ℃, and stopping heating when T is more than or equal to T0;
(3) other conditions are ventilation.
The double-system air conditioner control system is characterized in that: the environment temperature sensor detects the environment temperature of the air conditioner, the coil temperature sensor detects the temperature of the coil of the evaporator of the air conditioner, and when the environment temperature of the air conditioner is in the range of 5-27 ℃ and the air conditioner is used for double-system refrigeration, the evaporator of the air conditioner automatically defrost, so that the refrigeration efficiency of the air conditioner in a low-temperature environment is improved.
The control method comprises the following steps: when the temperature T1 is more than or equal to 5 ℃ and less than or equal to 27 ℃ and the double-system refrigeration is performed, the air conditioner continuously works for 90 minutes and then enters an air conditioner single-system refrigeration mode, one compressor stops working, resumes working after 5 minutes, enters the single-system refrigeration mode again after 45 minutes, and the other compressor stops working, resumes working after 5 minutes and circulates in sequence.
The evaporation fans in the electric execution part are shared, the compressor A and the condensation fan A are one group, the compressor B and the condensation fan B are the other group, and the two systems are completely independent. The controller controls the start and stop of each electric execution component, and the control method is as follows: when the air conditioner single system works, the evaporation fan, the compressor A and the condensation fan A work, and the compressor B and the condensation fan B are in a power-off state; or the evaporation fan, the compressor B and the condensation fan B work, and the compressor A and the condensation fan A are in a power-off state; and when one air conditioning single system is abnormal, the other air conditioning single system is automatically started to work. When the air conditioner double systems work, the evaporating fan works first, after one air conditioner single system is started, the other air conditioner single system is started after an interval of 30S, and the compressor A, the condensing fan A, the compressor B and the condensing fan B work.
The double-system air conditioner control system is characterized in that: the alarm circuit comprises an alarm circuit for pressure abnormality of one air-conditioning single system, pressure abnormality of the other air-conditioning single system, overload of one air-conditioning single system, overload of the other air-conditioning single system and the like.
The invention has the beneficial effects that:
1. the invention ensures that the air conditioner single systems alternately work when the temperature difference between the temperature of the return air inlet of the air conditioner and the set target temperature is 2 ℃, and one air conditioner single system is used for one standby, and the other air conditioner single system is abnormally and automatically switched to work;
2. the invention ensures that the air conditioner double systems work when the temperature difference between the temperature of the return air inlet of the air conditioner and the set target temperature is 4 ℃, and the starting power is reduced by time-sharing starting.
3. The invention ensures that the evaporator of the air conditioner automatically defrost when the air conditioner is in double-system refrigeration at the environment temperature of 5-27 ℃, and improves the refrigeration efficiency of the air conditioner in low-temperature environment.
4. The invention ensures the sharing of a control system, an evaporation fan and the like, reduces the cost, and ensures that the air conditioning equipment has simple structure and high reliability.
Drawings
Fig. 1 is a schematic block diagram of the structure of the present invention.
Detailed Description
Referring to fig. 1, a dual-system air conditioner control system comprises a controller 1, an operation display interface 2, a signal detection unit 3 and an electric execution part 4, wherein the input end of the controller 1 is respectively connected with the output ends of the operation display interface 2 and the signal detection unit 3, the output end of the controller 1 is connected with the input end of the electric execution part 4, data communication is performed between the operation display interface 2 and the controller 1, the signal detection unit 3 comprises a return air temperature sensor 5, a coil pipe temperature sensor 6, an environment temperature sensor 7 and an alarm circuit 8, and the electric execution part 4 comprises an evaporation fan 9, a compressor A10, a condensation fan A11, a compressor B12 and a condensation fan B13.
In the invention, a return air temperature sensor 5 detects the temperature of a return air inlet of an air conditioner evaporator, and a controller 1 automatically controls the start and stop of a single system or a double system of the air conditioner to work according to the difference value between the detection value of the return air temperature sensor 5 and the target temperature set by an operation display interface 2; when the temperature difference between the temperature of the return air inlet and the set target temperature is 2 ℃, the air-conditioning single systems alternately work, one air-conditioning single system is used, the other air-conditioning single system is standby, and the other air-conditioning single system is automatically switched to work when the abnormality of the one air-conditioning single system occurs; when the temperature difference between the temperature of the return air inlet and the set target temperature is 4 ℃, the air conditioner double systems work and start in a time-sharing mode so as to reduce the starting power.
The control method comprises the following steps:
t: return air inlet temperature, T0: setting temperature, T1: an external ambient temperature.
(1) When T is more than or equal to T0+2deg.C, refrigerating by an air conditioner single system, and when T is less than or equal to T0, stopping refrigerating;
when T is more than or equal to T0+4 ℃, the air conditioner double system is used for refrigerating, when T is less than T0+2 ℃, the air conditioner single system is used for refrigerating, and when T is less than or equal to T0, the refrigerating is stopped;
(2) heating by an air conditioner single system when T is less than or equal to T0-2 ℃, and stopping heating when T is more than or equal to T0;
heating by an air conditioner double system when T is less than or equal to T0-4 ℃, heating by an air conditioner single system when T is more than T0-2 ℃, and stopping heating when T is more than or equal to T0;
(3) other conditions are ventilation.
The environment temperature sensor 7 detects the environment temperature of the air conditioner, the coil temperature sensor 6 detects the temperature of the coil of the evaporator of the air conditioner, and when the environment temperature of the air conditioner is in the range of 5-27 ℃ and the air conditioner is used for double-system refrigeration, the evaporator of the air conditioner automatically defrost so as to improve the refrigeration efficiency of the low-temperature environment air conditioner.
The control method comprises the following steps: when the temperature T1 is more than or equal to 5 ℃ and less than or equal to 27 ℃ and the double-system refrigeration is performed, the air conditioner continuously works for 90 minutes and then enters an air conditioner single-system refrigeration mode, one compressor stops working, resumes working after 5 minutes, enters the single-system refrigeration mode again after 45 minutes, and the other compressor stops working, resumes working after 5 minutes and circulates in sequence.
In the electric execution part 4, the evaporating fan 9 is shared, the compressor A10 and the condensing fan A11 are one group, the compressor B12 and the condensing fan B13 are the other group, and the two systems are completely independent. The controller 1 controls the start and stop of each electric execution component, and the control method is as follows: when the air conditioner single system works, the evaporation fan 9, the compressor A10 and the condensation fan A11 work, and the compressor B12 and the condensation fan B13 are in a power-off state; or the evaporation fan 9, the compressor B12 and the condensation fan B13 work, and the compressor A10 and the condensation fan A11 are in a power-off state; and when one air conditioning single system is abnormal, the other air conditioning single system is automatically started to work. When the air conditioner double systems work, the evaporating fan 9 works first, after one air conditioner single system is started, the other air conditioner single system is started after an interval of 30S, and the compressor A10, the condensing fan A11, the compressor B12 and the condensing fan B13 work.
The alarm circuit 8 comprises an alarm circuit for pressure abnormality of one air-conditioning single system, pressure abnormality of the other air-conditioning single system, overload of one air-conditioning single system, overload of the other air-conditioning single system and the like.
The invention is further described below with reference to the accompanying drawings:
the controller 1 automatically controls the air conditioner to ventilate, refrigerate and heat according to the difference value between the air conditioner return air inlet temperature detected by the return air temperature sensor 5 and the target temperature set by the operation display interface 2. When the temperature of the return air inlet is 2 degrees higher than the set target temperature, the air conditioner single system refrigerates, and the evaporation fan 9, the compressor A10 and the condensation fan A11 work or the evaporation fan 9, the compressor A12 and the condensation fan A13 work; when the temperature of the return air inlet is 4 degrees higher than the set target temperature, the air conditioner double systems are used for refrigerating, after one air conditioner single system is started, the other air conditioner single system is started after an interval of 30S, and the evaporation fan 9, the compressor A10, the condensation fan A11, the compressor B12 and the condensation fan B13 work; when the temperature of the return air inlet reaches the set target temperature, the air conditioner stops refrigerating and only supplies air, and the evaporation fan 9 works, and the compressor A10, the condensation fan A11, the compressor B12 and the condensation fan B13 stop working; and when the temperature of the return air inlet is lower than the set target temperature by 2 ℃, the air conditioner single system heats, and when the temperature of the return air inlet is lower than the set target temperature by 4 ℃, the air conditioner double system heats.
The controller 1 monitors the air conditioner environment temperature and the air conditioner evaporator coil temperature in real time, when the environment temperature is in the range of 5-27 ℃ and the air conditioner dual system is used for refrigerating, the air conditioner evaporator is automatically controlled to defrost, the air conditioner dual system is used for continuously refrigerating for 90min and then enters the air conditioner single system for refrigerating, one compressor is stopped, the work is recovered after 5min, the air conditioner single system is again in a refrigerating mode after 45min, the other compressor is stopped, the work is recovered after 5min, and the air conditioner single system is sequentially circulated.
The alarm circuit 8 comprises an alarm circuit for pressure abnormality of one air-conditioning single system, pressure abnormality of the other air-conditioning single system, overload of one air-conditioning single system, overload of the other air-conditioning single system and the like. The controller 1 monitors the state of the alarm circuit 8 in real time, and when one air conditioning single system is abnormal, the controller 1 automatically starts the other air conditioning single system to work.
Claims (2)
1. A double-system air conditioner control system is characterized in that: the intelligent control system comprises a controller, an operation display interface, a signal detection unit and an electric execution part, wherein the input end of the controller is respectively connected with the output ends of the operation display interface and the signal detection unit, the output end of the controller is connected with the input end of the electric execution part, the operation display interface is in data communication with the controller, the signal detection unit comprises a return air temperature sensor, a coil pipe temperature sensor, an environment temperature sensor and an alarm circuit, and the electric execution part comprises an evaporation fan, a compressor A, a condensation fan A, a compressor B and a condensation fan B;
the controller automatically controls the start and stop of a single system or a double system of the air conditioner according to the difference value between the detection value of the return air temperature sensor and the target temperature set by the operation display interface; when the temperature difference between the temperature of the return air inlet and the set target temperature is 2 ℃, the air-conditioning single systems alternately work, one air-conditioning single system is used, the other air-conditioning single system is standby, and the other air-conditioning single system is automatically switched to work when the abnormality of the one air-conditioning single system occurs; when the temperature difference between the temperature of the return air inlet and the set target temperature is 4 ℃, the air conditioner double systems work and are started in a time-sharing way;
the environment temperature sensor detects the environment temperature of the air conditioner, the coil temperature sensor detects the temperature of the coil of the evaporator of the air conditioner, and when the environment temperature of the air conditioner is in the range of 5-27 ℃ and the air conditioner is used for double-system refrigeration, the evaporator of the air conditioner automatically defrost.
2. The dual system air conditioner control system according to claim 1, wherein: the alarm circuit comprises an alarm circuit for pressure abnormality of one air-conditioning single system, pressure abnormality of the other air-conditioning single system, overload of the one air-conditioning single system and overload of the other air-conditioning single system.
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| CN201710723801.4A CN107339783B (en) | 2017-08-22 | 2017-08-22 | Dual-system air conditioner control system |
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| CN201710723801.4A CN107339783B (en) | 2017-08-22 | 2017-08-22 | Dual-system air conditioner control system |
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| CN110793169B (en) * | 2019-09-23 | 2021-04-02 | 珠海格力电器股份有限公司 | Dual-system control method and device and dual-system air conditioning equipment |
| CN110631215B (en) * | 2019-11-04 | 2020-08-04 | 珠海格力电器股份有限公司 | Method for controlling display panel, controller and dual-system air conditioner |
| CN110926100B (en) * | 2019-12-14 | 2022-06-03 | 冰山松洋生物科技(大连)有限公司 | ECO energy-saving mode control method and system for self-cascade dual-system ultralow-temperature refrigerator |
| CN112503717B (en) * | 2020-11-02 | 2022-04-08 | 珠海格力电器股份有限公司 | Control method and device of universal air conditioner controller and universal air conditioner controller |
| CN114484716A (en) * | 2022-01-11 | 2022-05-13 | 珠海格力电器股份有限公司 | Air conditioner, control method and device thereof and computer readable storage medium |
| CN117433194B (en) * | 2023-12-20 | 2024-04-05 | 珠海格力电器股份有限公司 | Control method and device of refrigeration system, refrigeration system and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05221237A (en) * | 1991-12-03 | 1993-08-31 | Toshiba Corp | Air conditioning device for vehicle |
| CN1767754A (en) * | 2005-11-04 | 2006-05-03 | 苏州昆拓冷机有限公司 | Dual system control cabinet air-conditioning device |
| CN202598725U (en) * | 2012-04-06 | 2012-12-12 | 上海约顿机房设备有限公司 | Dual-system integrated computer room energy-saving air conditioner |
| CN104266314A (en) * | 2014-10-16 | 2015-01-07 | 中国扬子集团滁州扬子空调器有限公司 | Control method for combined refrigerating multi-split air conditioner system |
| CN106949549A (en) * | 2017-04-20 | 2017-07-14 | 中铁第四勘察设计院集团有限公司 | A kind of railway computer room dual system air-conditioning |
| CN207230850U (en) * | 2017-08-22 | 2018-04-13 | 合肥天鹅制冷科技有限公司 | Dual system air-conditioner control system |
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