CN110979367A - Control method of condensing fan of air conditioning unit - Google Patents
Control method of condensing fan of air conditioning unit Download PDFInfo
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- CN110979367A CN110979367A CN201911267202.1A CN201911267202A CN110979367A CN 110979367 A CN110979367 A CN 110979367A CN 201911267202 A CN201911267202 A CN 201911267202A CN 110979367 A CN110979367 A CN 110979367A
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- condensing fan
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- conditioning unit
- air conditioning
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000005494 condensation Effects 0.000 claims description 16
- 238000009833 condensation Methods 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000001934 delay Effects 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D27/00—Heating, cooling, ventilating, or air-conditioning
- B61D27/0018—Air-conditioning means, i.e. combining at least two of the following ways of treating or supplying air, namely heating, cooling or ventilating
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- Engineering & Computer Science (AREA)
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- Air-Conditioning For Vehicles (AREA)
Abstract
The invention relates to a control method of a condensing fan of an air conditioning unit, wherein the air conditioning unit comprises a compressor, an evaporator, a condenser and the condensing fan which are connected through pipelines, a frequency converter is arranged on the condenser, a main controller in signal connection with the condenser selects the operation frequency of the corresponding condensing fan according to passenger capacity data of a carriage, and the frequency converter regulates and controls the operation frequency of the condensing fan in real time. The air conditioning unit disclosed by the invention has the advantages that the noise is reduced, and the service life of the condensing fan is prolonged. And a certain compression ratio of the refrigerating system is maintained, so that normal oil return of the compressor is ensured, and the service life of the compressor of the track air conditioning unit is prolonged. The frequent fluctuation of the fan frequency is effectively avoided, and the fluctuation of the refrigeration system is reduced.
Description
Technical Field
The invention relates to a control method, in particular to a control method of a condensing fan of an air conditioning unit.
Background
At present, track air conditioner's condensation fan generally adopts the control of deciding frequently, relies on actuation and the disconnection of contactor to control opening and stopping of condensation fan, simultaneously, decides frequently that track air conditioning unit opens as the prerequisite predecessor that the compressor opened with opening of condensation fan, and as long as the compressor starts promptly, the operation of rated frequency must be decided to the condensation fan.
Two problems exist in the control mode of the common condensation fan:
1. the condensing fan runs continuously at high frequency, the noise is large, the service life is reduced, and the power consumption is high;
2. when the condensing fan is located outdoors and the outdoor temperature is low, the external fan continuously runs at high frequency, the high-low pressure ratio of the refrigerating system is reduced, the oil return of the compressor is difficult, and the compressor is burnt out due to oil shortage in severe cases.
The defects also have similar problems not only in a track air conditioner, but also in a common heat pump air conditioner and a household air conditioner.
Disclosure of Invention
The invention mainly aims to solve the technical problems in the prior art and provides a control method of a condensing fan of an air conditioning unit, which can prevent the fan from continuously running at high frequency.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a control method of a condensation fan of an air conditioning unit comprises a compressor, an evaporator, a condenser and the condensation fan which are connected through pipelines, wherein a frequency converter is arranged on the condenser, a main controller in signal connection with the condenser selects the corresponding operation frequency of the condensation fan according to passenger capacity data of a carriage, and the frequency converter regulates and controls the operation frequency of the condensation fan in real time.
Further, the main controller regulates and controls the operating frequency of the condensing fan through the frequency converter on the basis of fresh air volume and passenger capacity.
Further, the main controller receives a load signal AW transmitted by a vehicle control system and calculates passenger capacity data of the carriage.
Furthermore, a data processing module is arranged in the main controller, a fresh air volume interval, a passenger capacity interval and a condensation fan operation frequency corresponding table are preset in the data processing module, the main controller selects corresponding condensation fan operation frequency according to the fresh air volume and the passenger capacity interval, and controls the frequency converter to regulate and control the operation frequency of the condensation fan.
Further, if the fresh air volume and the passenger capacity are both in the original area, maintaining the operation frequency of the condensing fan;
if only one of the fresh air volume and the passenger capacity is not in the current interval, maintaining the operating frequency of the condensing fan;
and if the fresh air volume and the passenger capacity are not in the current interval, regulating and controlling according to the operation frequency of the condensing fan corresponding to the interval in which the fresh air volume and the passenger capacity are located.
Further, after the main controller delays Ts, the operation frequency of the condensing fan is regulated and controlled through the frequency converter again according to the received real-time passenger capacity data and the real-time fresh air volume.
Further, after detecting a door opening and closing signal transmitted by a vehicle control system, the main controller regulates and controls the running frequency of the condensing fan through the frequency converter again according to the received real-time passenger load data and the real-time fresh air volume.
Furthermore, a fresh air valve is arranged at a fresh air inlet of the air conditioning unit and is in signal connection with the main controller through an I/O (input/output) board.
Furthermore, a plurality of opening degrees N are preset in the fresh air valve, and the fresh air volume interval is formed between every two adjacent opening degrees N.
In summary, compared with the prior art, the control method of the condensing fan of the air conditioning unit has the following advantages:
1. the noise of the air conditioning unit is reduced, and the service life of the condensing fan is prolonged;
2. a certain compression ratio of the refrigeration system is maintained, so that normal oil return of the compressor is ensured, and the service life of the compressor of the track air conditioning unit is prolonged;
3. frequent fluctuation of the fan frequency is effectively avoided, and fluctuation of a refrigeration system is reduced;
4. due to the reduction of the frequency of the fan, the power consumption of the fan is reduced, so that the energy efficiency ratio of the refrigeration system under the low-temperature working condition is improved, and the energy is saved.
Drawings
FIG. 1 is a schematic diagram of the construction of the refrigeration system of the present invention;
FIG. 2 is a flow chart of the control method of the present invention.
As shown in fig. 1 and 2, the air conditioner comprises a compressor 1, a condenser 2, a throttling device 3, an evaporator 4, a main controller 5, a condensing fan 21, a frequency converter 23, a ventilator 41, a vehicle control system 6, a fresh air valve 7 and an I/O board 8.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings:
in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention relates to a control method of a condensing fan of an air conditioning unit, which aims at the air conditioning unit of a railway vehicle, the air conditioning unit of the railway vehicle comprises a compressor 1, an evaporator 4, a condenser 2 and the condensing fan 21 which are connected through pipelines, and the air conditioning unit also comprises a frequency converter 23 which can adjust the rotating speed of the condensing fan 21 according to passenger capacity and fresh air volume.
Specifically, as shown in fig. 1, the air conditioning unit includes an outdoor unit including a condenser 2 and a condensing fan 21, and an indoor unit including an evaporator 4 and a fan 41 for the evaporator 4, the outdoor unit and the indoor unit being connected to each other through a pipe and to the compressor 1, and a throttle device 3 being connected to a communication pipe between the evaporator 4 and the condenser 2.
In order to avoid continuous high-frequency operation of the fan, reduce operation noise and prolong the service life of the fan, in the invention, the condensing fan 21 is provided with the frequency converter 23 which can regulate and control the operation frequency of the condensing fan 21 in real time, and the frequency converter 23 regulates and controls the real-time operation frequency of the condensing fan 21 through passenger capacity data. In this embodiment, the condenser 2 includes a condenser coil, which may be a finned condenser, and the condenser coil is provided with a plurality of fins to increase the heat dissipation effect, or a plate-and-tube condenser, which is a condenser with any other structure.
In order to further precisely control the operation frequency of the condensing fan 21, in the present embodiment, the frequency converter 23 adjusts and controls the real-time operation frequency of the condensing fan 21 according to the passenger capacity data and the fresh air volume.
The air conditioning unit also comprises a four-way valve to realize the conversion of refrigeration and heating.
The air conditioning unit further comprises a main controller 5, the main controller 5 is electrically connected with the compressor 1, the frequency converter 23 and the vehicle control system 6, signal transmission can be achieved, and the main controller 5 controls the on-off of the air conditioning unit through remote control or on-off. The main controller 5 is internally provided with a data processing module, the data processing module is pre-stored with a fresh air volume interval, a passenger capacity interval and a condensation fan 21 operation frequency corresponding table, and the data processing module receives a load signal AW transmitted by a vehicle control system and calculates passenger capacity data of a carriage; the data processing module detects the opening N of the fresh air valve 7 so as to obtain the fresh air volume, selects corresponding operating frequency in the corresponding table, sends a signal to the frequency converter 23, and controls the operating frequency of the condensing fan 21 through the frequency converter 23.
In order to avoid frequent adjustment of the operation frequency of the condensing fan 21, a timing device may be provided in the main controller 5, and the operation frequency of the condensing fan 21 may be adjusted every Ts according to the detected real-time passenger capacity data and real-time fresh air volume. The operating frequency of the condensing fan 21 is adjusted in the up-and-down peak period of personnel, so that the inaccurate adjustment is caused due to inaccurate data acquisition, and the operating frequency of the condensing fan 21 can be adjusted according to the detected real-time passenger load data and the real-time fresh air volume after the door opening and closing signal transmitted by the vehicle control system 6 is detected by the main controller 5 to avoid the condition.
The vehicle control system 6 is mainly electrically connected with each device of the vehicle and realizes the control of the operation of each device. The vehicle control system 6 controls the operation of the air conditioning unit and transmits a door opening and closing signal and a car load signal AW to the air conditioning unit main controller 5. The main controller 5 calculates the passenger capacity data in the carriage according to the carriage load signal AW, and the adjacent passenger capacity data form a passenger capacity interval. Specifically, the main controller 5 subtracts the original weight of the passenger in the vehicle compartment from the vehicle compartment load data, and divides the subtracted weight by the set weight of each person to obtain the passenger load data in the vehicle compartment. In the present embodiment, the weight of each person is set to be 60KG, which is a typical weight of an adult.
A fresh air valve 7 is arranged at a fresh air port of the air conditioning unit, and the fresh air valve 7 is in signal connection with the main controller 5 through an I/O board 8. The main controller 5 controls the opening N of the fresh air valve 7, adjusts the fresh air volume, receives a feedback signal of the opening N through the I/O board 8, and the main controller 5 obtains the fresh air volume according to the opening N of the fresh air valve 7 transmitted by the I/O board 8. A plurality of opening N are preset to the fresh air valve 7, and a fresh air volume interval is formed between two adjacent opening N. The opening N of the fresh air valve 7 is controlled by the main controller 5 and is determined by passenger capacity, the larger the passenger capacity is, the larger the opening value is, and the passenger capacity value determining the opening N of the fresh air valve 7 is different from the passenger capacity value determining the operation frequency of the condensing fan, for example: the passenger capacity numerical intervals of the opening N of the fresh air valve 7 are determined to be 0-10 persons and 10-20 persons …, and the passenger capacity numerical intervals of the operating frequency of the condensing fan are determined to be 0-15 persons and 15-30 persons ….
In this embodiment, for convenience of quantization and implementation, the compartment load data interval is converted into an interval corresponding to the compartment load signal AW, the fresh air volume interval is converted into an interval corresponding to the opening N of the fresh air valve 7, and the passenger load interval, the fresh air volume interval and the operating frequency correspondence table of the condensing fan 21 are the compartment load signal interval, the fresh air valve opening interval and the operating frequency correspondence table of the condensing fan 21 shown in table 1.
TABLE 1 Compartment load signal interval, fresh air valve opening interval and condensing fan operating frequency corresponding table
As shown in table 1, the operation frequency of the condensing fan 21 is determined by the compartment load signal interval and the opening interval of the fresh air valve.
In the control method of the condensing fan of the air conditioning unit, as shown in fig. 2, a vehicle control system 6 transmits a compartment load signal AW to a main controller 5; the main controller 5 detects the opening N of the fresh air valve 7; the main controller 5 detects whether the compressor is started, if so, the main controller 5 selects the corresponding fan operating frequency in table 1 according to the compartment load signal AW and the interval where the opening N of the fresh air valve 7 is located, and the frequency converter 23 controls the operating frequency of the condensing fan 21.
The main controller 5 continues to monitor the carriage load signal AW and the opening N of the fresh air valve 7. And detecting the compartment load signal AW and the opening N of the fresh air valve 7 again every Ts or after detecting a door opening and closing signal, obtaining the corresponding operation frequency of the condensing fan 21 according to a compartment load signal interval in which the compartment load signal AW and the opening N of the fresh air valve 7 are positioned and a table lookup 1 of the opening interval of the fresh air valve, and operating the condensing fan 21 at the corresponding operation frequency.
When the load signal AW of the carriage and the opening N of the fresh air valve 7 are both in the original region, maintaining the operating frequency of the condensing fan 21;
when the carriage load signal AW and only one opening N of the fresh air valve 7 are not in the current interval, the operating frequency of the condensing fan 21 is also maintained;
when the load signal AW of the carriage and the opening N of the fresh air valve 7 are not in the current interval, the operation frequency of the condensing fan 21 corresponding to the interval where the fresh air volume and the passenger capacity are located is regulated and controlled.
That is, only when the fresh air volume and the passenger capacity are simultaneously changed, the operation frequency of the condensing fan 21 is regulated, so that the operation frequency of the condensing fan 21 is regulated and controlled more accurately. By the control mode, the operation of the fan is regulated and controlled in real time instead of being operated at a high speed all the time, so that the operation noise is reduced, and the service life of the condensing fan is prolonged.
Similar solutions can be derived from the solution given in the figures, as described above. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.
Claims (9)
1. The control method of the condensing fan of the air conditioning unit comprises a compressor, an evaporator, a condenser and the condensing fan which are connected through pipelines, and is characterized in that: the condenser is provided with a frequency converter, a main controller in signal connection with the condenser selects the corresponding operating frequency of the condensing fan according to passenger capacity data of a carriage, and the frequency converter regulates and controls the operating frequency of the condensing fan in real time.
2. The control method of the condensing fan of the air conditioning unit according to claim 1, characterized in that: and the main controller regulates and controls the operating frequency of the condensing fan through the frequency converter on the basis of the fresh air volume and the passenger capacity.
3. The control method of the condensing fan of the air conditioning unit according to claim 1 or 2, characterized in that: and the main controller receives a load signal AW transmitted by a vehicle control system and calculates passenger capacity data of the carriage.
4. The control method of the condensing fan of the air conditioning unit according to claim 2, characterized in that: the main controller is internally provided with a data processing module, the data processing module is preset with a fresh air volume interval, a passenger capacity interval and a condensation fan operation frequency corresponding table, the main controller selects corresponding condensation fan operation frequency according to the fresh air volume and the passenger capacity interval, and controls the frequency converter to regulate and control the operation frequency of the condensation fan.
5. The control method of the condensing fan of the air conditioning unit according to claim 4, characterized in that: if the fresh air volume and the passenger capacity are both in the original zone, maintaining the operating frequency of the condensing fan;
if only one of the fresh air volume and the passenger capacity is not in the current interval, maintaining the operating frequency of the condensing fan;
and if the fresh air volume and the passenger capacity are not in the current interval, regulating and controlling according to the operation frequency of the condensing fan corresponding to the interval in which the fresh air volume and the passenger capacity are located.
6. The control method of the condensing fan of the air conditioning unit according to claim 2, characterized in that: and after the main controller delays Ts, regulating and controlling the running frequency of the condensing fan through the frequency converter again according to the received real-time passenger load data and the real-time fresh air volume.
7. The control method of the condensing fan of the air conditioning unit according to claim 2, characterized in that: and after detecting a door opening and closing signal transmitted by the vehicle control system, the main controller regulates and controls the running frequency of the condensing fan through the frequency converter again according to the received real-time passenger load data and real-time fresh air volume.
8. The control method of the condensing fan of the air conditioning unit according to claim 4, characterized in that: the fresh air inlet of the air conditioning unit is provided with a fresh air valve, and the fresh air valve is in signal connection with the main controller through an I/O (input/output) board.
9. The control method of the condensing fan of the air conditioning unit according to claim 8, characterized in that: a plurality of opening N are preset in the fresh air valve, and a fresh air volume interval is formed between every two adjacent opening N.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114348039A (en) * | 2020-10-12 | 2022-04-15 | 浙江盾安人工环境股份有限公司 | Temperature adjusting method and device, storage medium and processor |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201615559U (en) * | 2010-01-29 | 2010-10-27 | 广东吉荣空调有限公司 | Integral energy-saving and environment-friendly base station air conditioner |
| CN102278805A (en) * | 2010-06-11 | 2011-12-14 | 三菱电机株式会社 | Air conditioner |
| CN104596054A (en) * | 2014-12-26 | 2015-05-06 | 珠海格力电器股份有限公司 | air conditioning unit fan control method and device |
| CN108006905A (en) * | 2017-10-20 | 2018-05-08 | 广州地铁设计研究院有限公司 | A kind of Metro Air conditioner Xingfeng capsule method |
| CN108489050A (en) * | 2018-05-28 | 2018-09-04 | 李柯睿 | A kind of Intelligent air conditioner control system and method |
| CN108759033A (en) * | 2018-07-27 | 2018-11-06 | 山东朗进科技股份有限公司 | A kind of control method of air-conditioner set condensation fan |
| CN109263671A (en) * | 2018-09-17 | 2019-01-25 | 山东朗进科技股份有限公司 | A kind of dehumidification control method of vehicle convertible frequency air-conditioner |
| CN109882999A (en) * | 2018-12-19 | 2019-06-14 | 郑州大学 | A method and intelligent air conditioner based on the Internet of Things and machine learning |
| CN209639209U (en) * | 2018-12-19 | 2019-11-15 | 郑州大学 | A kind of intelligent air condition ontology that identification number is actively adjusted |
-
2019
- 2019-12-11 CN CN201911267202.1A patent/CN110979367B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201615559U (en) * | 2010-01-29 | 2010-10-27 | 广东吉荣空调有限公司 | Integral energy-saving and environment-friendly base station air conditioner |
| CN102278805A (en) * | 2010-06-11 | 2011-12-14 | 三菱电机株式会社 | Air conditioner |
| CN104596054A (en) * | 2014-12-26 | 2015-05-06 | 珠海格力电器股份有限公司 | air conditioning unit fan control method and device |
| CN108006905A (en) * | 2017-10-20 | 2018-05-08 | 广州地铁设计研究院有限公司 | A kind of Metro Air conditioner Xingfeng capsule method |
| CN108489050A (en) * | 2018-05-28 | 2018-09-04 | 李柯睿 | A kind of Intelligent air conditioner control system and method |
| CN108759033A (en) * | 2018-07-27 | 2018-11-06 | 山东朗进科技股份有限公司 | A kind of control method of air-conditioner set condensation fan |
| CN109263671A (en) * | 2018-09-17 | 2019-01-25 | 山东朗进科技股份有限公司 | A kind of dehumidification control method of vehicle convertible frequency air-conditioner |
| CN109882999A (en) * | 2018-12-19 | 2019-06-14 | 郑州大学 | A method and intelligent air conditioner based on the Internet of Things and machine learning |
| CN209639209U (en) * | 2018-12-19 | 2019-11-15 | 郑州大学 | A kind of intelligent air condition ontology that identification number is actively adjusted |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114348039A (en) * | 2020-10-12 | 2022-04-15 | 浙江盾安人工环境股份有限公司 | Temperature adjusting method and device, storage medium and processor |
| CN114348039B (en) * | 2020-10-12 | 2023-05-16 | 浙江盾安人工环境股份有限公司 | Temperature adjusting method, device, storage medium and processor |
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