CN115158380B - Control method and control system for full fresh air mode of variable-frequency air conditioner of railway vehicle - Google Patents
Control method and control system for full fresh air mode of variable-frequency air conditioner of railway vehicle Download PDFInfo
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- CN115158380B CN115158380B CN202210728733.1A CN202210728733A CN115158380B CN 115158380 B CN115158380 B CN 115158380B CN 202210728733 A CN202210728733 A CN 202210728733A CN 115158380 B CN115158380 B CN 115158380B
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- air conditioner
- temperature
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- environment temperature
- tin
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 238000005057 refrigeration Methods 0.000 claims abstract description 12
- 238000009423 ventilation Methods 0.000 claims abstract description 11
- 238000005457 optimization Methods 0.000 claims abstract description 10
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 42
- 239000002699 waste material Substances 0.000 claims description 16
- 238000004378 air conditioning Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method of a full fresh air mode of a variable frequency air conditioner of a railway vehicle, which comprises the following steps: judging the running refrigeration, heating or ventilation modes of the railway vehicle in a full fresh air mode according to the outdoor environment temperature and the comparison between the indoor environment temperature and the set temperature; when the variable-frequency air conditioner of the railway vehicle operates in a full fresh air mode for refrigerating or heating, judging whether the variable-frequency air conditioner needs to enter optimized control or not by comparing the indoor environment temperature with the set temperature; when the optimization control is entered, the running state of the related equipment is adjusted; the invention can ensure the output of the refrigerating capacity and the heating capacity of the air conditioner in the full fresh air mode and the comfort in the passenger room. The invention also relates to a control system using the control method of the full fresh air mode of the variable-frequency air conditioner of the railway vehicle, which can adjust the comfort in the passenger room of the railway vehicle.
Description
Technical Field
The invention belongs to the field of variable frequency air conditioners of railway vehicles, and particularly relates to a control method and a control system for a full fresh air mode of a variable frequency air conditioner of a railway vehicle.
Background
Under the influence of epidemic situation, the existing air conditioning system of the railway vehicle is gradually added with an epidemic prevention mode, namely a full fresh air mode, and the return air valve of the air conditioning system of the railway vehicle is completely closed and the fresh air valve is completely opened under the full fresh air mode.
The full fresh air mode can lead to the reduction of the air supply quantity and the increase of the fresh air load when the fresh air intake in the vehicle is increased, thereby affecting the temperature comfort of the passenger room, and on the other hand, the full fresh air mode can lead to the increase of the positive pressure in the vehicle, thereby affecting the closing of the vehicle door, and a control method for solving the technical problems is not available in the prior art.
The present invention has been made in view of this.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a control method of a full fresh air mode of a variable frequency air conditioner of a railway vehicle, which can ensure the output of the refrigerating capacity and quality of the air conditioner and the comfort in a passenger room on one hand and ensure the positive pressure in the vehicle to be in a reasonable range on the other hand.
The invention further aims to provide a control system utilizing the control method for the full fresh air mode of the variable-frequency air conditioner for the railway vehicle.
In order to achieve the first invention object, the present invention adopts the following technical scheme:
a control method of a full fresh air mode of a variable frequency air conditioner of a railway vehicle comprises the following steps,
step one, judging a running refrigeration, heating or ventilation mode of the railway vehicle in a full fresh air mode according to the outdoor environment temperature Toa and the comparison between the indoor environment temperature Tin and the set temperature Ts;
step two, judging whether the rail vehicle variable frequency air conditioner needs to enter optimized control or not by comparing the indoor environment temperature Tin with the set temperature Ts when the rail vehicle variable frequency air conditioner operates in a full fresh air mode for refrigerating or heating;
step three, when the optimization control is carried out, the running state of the related equipment is adjusted;
and fourthly, judging that the running state of the next step is the returning step I or the returning step III according to the comparison of the indoor environment temperature Tin and the set temperature Ts.
Further, in the first step, when the external ambient temperature Toa is less than or equal to the first determination temperature T1 and the indoor ambient temperature Tin is less than or equal to the set temperature Ts, the air conditioner of the railway vehicle operates in the heating mode in the fresh air mode.
Further, in the first step, when the external ambient temperature Toa is greater than or equal to the second determination temperature T2 and the indoor ambient temperature is greater than or equal to the set temperature Ts, the air conditioner of the railway vehicle operates in the cooling mode in the fresh air mode.
Further, the judgment condition of the track vehicle variable frequency air conditioner entering the optimized control in the second step of the heating mode is that
Tin≤Ts-ΔT1℃，
And the duration time is greater than or equal to the first set time, the delta T1 is the first temperature allowance, if yes, the optimization control is carried out, and if not, the step one is returned.
Further, the judgment condition for the rail vehicle variable frequency air conditioner to enter the optimized control in the second step under the refrigeration mode is that
Tin≥Ts+ΔT2℃，
And the duration time is greater than or equal to the second set time, delta T2 is the second temperature margin, if yes, the optimization control is carried out, and if not, the step one is returned.
Further, the step three of adjusting the operation state of the related equipment includes frequency raising the air conditioner compressor or the blower, frequency raising the exhaust fan or opening the exhaust valve.
Further, in the fourth step of the heating mode, the judgment condition is that Tin is more than or equal to Ts-DeltaT 3 ℃, deltaT 3 is the third temperature allowance, if yes, the step I is returned, and if not, the step III is returned.
Further, in the fourth step in the refrigeration mode, the judgment condition is Tin less than or equal to Ts+Δt4deg.C, Δt4 is the fourth temperature margin, if yes, the step I is returned, and if not, the step III is returned.
In order to achieve the second object, the present invention adopts the following technical scheme:
a control system utilizing the control method of the full fresh air mode of the variable-frequency air conditioner of the railway vehicle comprises an indoor temperature sensor, an outdoor temperature sensor, a control unit and an air conditioner operation unit;
the outdoor temperature sensor is used for measuring the outdoor environment temperature Toa and transmitting the control unit;
the indoor temperature sensor is used for measuring indoor environment temperature Tin and transmitting the indoor environment temperature Tin to the control unit;
the control unit is used for controlling the air conditioner operation unit to operate according to a preset program and combining the indoor environment temperature and the outdoor environment temperature.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects:
1. the invention can ensure the output of the refrigerating capacity and the heating capacity of the air conditioner and the comfort of the passenger room through optimal control.
2. According to the invention, through optimal control, on the basis of the frequency of the original exhaust fan or the opening of the exhaust valve, the frequency of the exhaust fan is increased or the opening of the exhaust valve is increased, so that the positive pressure in the vehicle is ensured to be in a reasonable range, and the influence on the closing of the vehicle door is avoided.
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:
FIG. 1 is a flow chart of a control method of a full fresh air mode of a variable frequency air conditioner for a railway vehicle.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
As shown in fig. 1, after the air conditioner of the railway vehicle clicks on the cab control screen to enter the fresh air mode, a train control and management system (Train Control and Management System, TCMS) issues a command to start running the fresh air mode for each air conditioner.
In the first embodiment, each air conditioner first determines the operation cooling, heating or ventilation mode according to the outdoor environment temperature Toa and the comparison between the indoor environment temperature Tin and the set temperature Ts, and the specific determination condition is that
Toa≤T1,
Tin≤Ts，
Wherein T1 is the first judgment temperature, and it can be seen from the judgment condition that the variable frequency air conditioner of the railway vehicle operates in a heating mode if and only if the outdoor environment temperature Toa is less than or equal to the first judgment temperature T1 and the indoor environment temperature Tin is less than or equal to the set temperature Ts. Under other conditions, the outdoor environment temperature Toa is larger than the first judging temperature T1, which indicates that the outdoor environment temperature is higher or the indoor environment temperature Tin is larger than the set temperature, which indicates that the indoor environment temperature is higher, and at the moment, the heating mode is not suitable to be started, and the operation ventilation mode of the variable-frequency air conditioner of the railway vehicle is reasonable choice.
After the variable-frequency air conditioner of the railway vehicle operates in a heating mode, comparing the indoor environment temperature Tin with the set temperature Ts, judging whether the optimal control is needed, and judging that the condition is that
Tin≤Ts-ΔT1℃，
And the duration time is greater than or equal to the first set time, deltaT 1 is the first temperature allowance, after the heating mode is operated, the indoor environment temperature Tin is less than or equal to Ts-DeltaT 1 ℃, which indicates that the heating capacity of the air conditioner is small, the duration time is greater than or equal to the set time, so that the equipment can be prevented from switching back and forth due to sensor errors, and the passenger room temperature fluctuation is large, preferably, deltaT 1 is set to 2, the first set time is set to 200-300 s, and further, the first set time is set to 240s.
If the judgment result is yes, the next step of optimizing control is performed, otherwise, the operation refrigeration, heating or ventilation modes are judged again according to the comparison of the outdoor environment temperature Toa and the indoor environment temperature Tin with the set temperature Ts;
after the optimization control is carried out, the running state of the related equipment is adjusted, and the measures for adjusting the running state of the related equipment comprise, but are not limited to, frequency raising of a compressor and a blower, frequency raising of a waste exhaust fan or increasing of the opening of a waste exhaust valve, frequency raising of the compressor and the blower can ensure the output of air conditioning heat, passenger room comfort is ensured, frequency raising of the waste exhaust fan or increasing of the opening of the waste exhaust valve can ensure that the positive pressure in a vehicle is within a reasonable range, and the influence on closing of a vehicle door is avoided.
Further, the invention compares the indoor environment temperature Tin with the set temperature Ts again, and judges that the condition is that
Tin≥Ts-ΔT3℃，
Delta T3 is the third temperature allowance, if the judgment result is yes, the indoor environment temperature is indicated to be relatively close to the set temperature, and the operation refrigeration, heating or ventilation mode is judged again according to the comparison of the outdoor environment temperature Toa and the indoor environment temperature Tin with the set temperature Ts, so that the comfort of the temperature of the passenger room is ensured; if the judgment result is negative, the indoor environment temperature is still lower, the air conditioner heating amount is still smaller, the optimization control stage is returned to again frequency-raising the compressor and the blower, the waste exhaust fan is again frequency-raised or the waste exhaust valve opening is increased again to improve the air conditioner heating amount, and preferably, the delta T3 is set to be 1.
In the second embodiment, each air conditioner first determines the operation cooling, heating or ventilation mode according to the outdoor environment temperature Toa and the comparison between the indoor environment temperature Tin and the set temperature Ts, and the specific determination condition is that
Toa≥T2,
Tin≥Ts，
Wherein T2 is the second judgment temperature, and the judgment condition can show that the variable frequency air conditioner of the railway vehicle runs in the refrigeration mode if and only if the outdoor environment temperature Toa is more than or equal to the second judgment temperature T2 and the indoor environment temperature Tin is more than or equal to the set temperature Ts. Under other conditions, the outdoor environment temperature Toa is smaller than the second judging temperature T2, which indicates that the outdoor environment temperature is lower or the indoor environment temperature Tin is smaller than the set temperature, which indicates that the indoor environment temperature is lower, at the moment, the refrigerating mode is not suitable to be started, and the operation ventilation mode of the variable-frequency air conditioner of the railway vehicle is a reasonable choice.
After the variable-frequency air conditioner of the railway vehicle operates in the refrigerating mode, comparing the indoor environment temperature Tin with the set temperature Ts, judging whether the optimal control is needed, and judging that the condition is that
Tin≥Ts+ΔT2℃，
And the duration time is greater than or equal to the second set time, deltaT 2 is the second temperature allowance, after the refrigerating mode is operated, the indoor environment temperature Tin is greater than or equal to Ts+DeltaT2deg.C, which indicates that the refrigerating capacity of the air conditioner is smaller, the duration time is greater than or equal to the second set time, so that the equipment is prevented from switching back and forth due to sensor errors, and the passenger room temperature fluctuation is large, preferably, deltaT 2 is set to 2, the second set time is set to 200-300 s, and further, the second set time is set to 240s.
If the judgment result is yes, the next step of optimizing control is performed, otherwise, the operation refrigeration, heating or ventilation modes are judged again according to the comparison of the outdoor environment temperature Toa and the indoor environment temperature Tin with the set temperature Ts;
after the optimization control is carried out, the invention adjusts the running state of the related equipment, and the measures for adjusting the running state of the related equipment comprise, but are not limited to, frequency raising of a compressor and a blower, frequency raising of a waste exhaust fan or increasing of the opening of a waste exhaust valve.
Further, the indoor environment temperature Tin and the set temperature Ts are compared again, the judging condition is that the Tin is less than or equal to Ts+delta T4 ℃,
delta T4 is the fourth temperature allowance, if the judgment result is yes, the indoor environment temperature is indicated to be relatively close to the set temperature, and the operation refrigeration, heating or ventilation mode is judged again according to the comparison of the outdoor environment temperature Toa and the indoor environment temperature Tin with the set temperature Ts, so that the comfort of the temperature of the passenger room is ensured; if the judgment result is negative, the indoor environment temperature is still higher, the air conditioner refrigerating capacity is still smaller, the optimal control stage returns to carry out frequency boosting on the compressor and the air feeder again, the waste exhaust fan is subjected to frequency boosting again or the waste exhaust valve opening is increased again to improve the air conditioner refrigerating capacity, the comfort of the passenger room is ensured, and the positive pressure in the vehicle can be ensured to be within a reasonable range by frequency boosting on the waste exhaust fan or increasing the waste exhaust fan opening.
The invention also comprises a control system utilizing the control method of the variable frequency air conditioner of the railway vehicle, which comprises an outdoor temperature sensor, an indoor temperature sensor, a control unit and an air conditioner operation unit, wherein the outdoor temperature sensor is used for measuring the outdoor environment temperature and transmitting the outdoor environment temperature to the control unit, the indoor temperature sensor is used for measuring the indoor environment temperature and transmitting the indoor environment temperature to the control unit, the control unit controls the air conditioner operation unit to operate through preset program logic and according to the data transmitted by the outdoor temperature sensor and the indoor temperature sensor, the air conditioner operation unit comprises, but is not limited to, a compressor, a blower, a waste exhaust fan and a waste exhaust valve, and after receiving the command transmitted by the control unit, the air conditioner operation unit starts to operate.
The foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited to the above-mentioned embodiment, but is not limited to the above-mentioned embodiment, and any simple modification, equivalent change and modification made by the technical matter of the present invention can be further combined or replaced by the equivalent embodiment without departing from the scope of the technical solution of the present invention.
Claims (4)
1. A control method of a full fresh air mode of a variable frequency air conditioner of a railway vehicle is characterized by comprising the following steps of: comprises the following steps of the method,
step one, judging a running refrigeration, heating or ventilation mode of the railway vehicle in a full fresh air mode according to the outdoor environment temperature Toa and the comparison between the indoor environment temperature Tin and the set temperature Ts;
step two, judging whether the rail vehicle variable frequency air conditioner needs to enter optimized control or not by comparing the indoor environment temperature Tin with the set temperature Ts when the rail vehicle variable frequency air conditioner operates in a full fresh air mode for refrigerating or heating;
step three, when the optimization control is carried out, the running state of the related equipment is adjusted;
judging the running state of the next step to be returned to the first step or the third step according to the comparison between the indoor environment temperature Tin and the set temperature Ts;
in the first step, when the external environment temperature Toa is smaller than or equal to the first judgment temperature T1 and the indoor environment temperature Tin is smaller than or equal to the set temperature Ts, the air conditioner of the railway vehicle operates in a heating mode in a full fresh air mode;
in the first step, when the external environment temperature Toa is greater than or equal to the second judging temperature T2 and the indoor environment temperature is greater than or equal to the set temperature Ts, the air conditioner of the railway vehicle operates in a refrigerating mode in a full fresh air mode;
the judgment condition for the track vehicle variable frequency air conditioner to enter the optimal control in the second step of heating mode is that
Tin≤Ts-ΔT1℃，
And the duration time is greater than or equal to the first set time, delta T1 is the first temperature allowance, if yes, the optimization control is carried out, and if not, the step one is returned;
the judgment condition for the track vehicle variable frequency air conditioner to enter the optimized control in the second step under the refrigeration mode is that
Tin≥Ts+ΔT2℃，
And the duration time is greater than or equal to the second set time, delta T2 is the second temperature allowance, if yes, the optimization control is carried out, and if not, the step one is returned;
and in the third step, the operation state of the related equipment is adjusted, wherein the step comprises the steps of frequency raising of an air conditioner compressor or a blower, frequency raising of a waste exhaust fan or opening increase of a waste exhaust valve.
2. The control method for the full fresh air mode of the variable frequency air conditioner of the railway vehicle according to claim 1 is characterized by comprising the following steps: and in the fourth step of the heating mode, the judging condition is that Tin is more than or equal to Ts-delta T3 ℃, delta T3 is the third temperature allowance, if yes, the step I is returned, and if not, the step III is returned.
3. The control method for the full fresh air mode of the variable frequency air conditioner of the railway vehicle according to claim 1 is characterized by comprising the following steps: and in the fourth step of the refrigeration mode, the judgment condition is Tin less than or equal to Ts+DeltaT4deg.C, deltaT 4 is the fourth temperature allowance, the step I is returned if the judgment result is yes, and the step III is returned if the judgment result is not.
4. A control system for implementing the method for controlling the full fresh air mode of the variable frequency air conditioner for the rail vehicle according to any one of claims 1 to 3, wherein: the air conditioner comprises an indoor temperature sensor, an outdoor temperature sensor, a control unit and an air conditioner operation unit;
the outdoor temperature sensor is used for measuring the outdoor environment temperature Toa and transmitting the control unit;
the indoor temperature sensor is used for measuring indoor environment temperature Tin and transmitting the indoor environment temperature Tin to the control unit;
the control unit is used for controlling the air conditioner operation unit to operate according to a preset program and combining the indoor environment temperature and the outdoor environment temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210728733.1A CN115158380B (en) | 2022-06-24 | 2022-06-24 | Control method and control system for full fresh air mode of variable-frequency air conditioner of railway vehicle |
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| CN202210728733.1A CN115158380B (en) | 2022-06-24 | 2022-06-24 | Control method and control system for full fresh air mode of variable-frequency air conditioner of railway vehicle |
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| Publication Number | Publication Date |
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| CN115158380A CN115158380A (en) | 2022-10-11 |
| CN115158380B true CN115158380B (en) | 2024-03-12 |
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2022
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Patent Citations (6)
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| KR20000021312A (en) * | 1998-09-28 | 2000-04-25 | 정몽규 | Air conditioning system for bus and controlling method thereof |
| CN105042795A (en) * | 2015-08-31 | 2015-11-11 | 青岛海尔空调器有限总公司 | Control method for wall-mounted frequency conversion air conditioner |
| CN109827302A (en) * | 2019-01-28 | 2019-05-31 | 广州大学 | The control method of Public Areas Associated with Metro Station water cooling straight-expansion type air conditioner unit |
| CN110293984A (en) * | 2019-07-04 | 2019-10-01 | 中车大连机车研究所有限公司 | A kind of rail traffic CO2Refrigerant air conditioning control method |
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