CN115303311A - Control method of heat pump air conditioning unit, electronic device and storage medium - Google Patents
Control method of heat pump air conditioning unit, electronic device and storage medium Download PDFInfo
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- CN115303311A CN115303311A CN202110499050.9A CN202110499050A CN115303311A CN 115303311 A CN115303311 A CN 115303311A CN 202110499050 A CN202110499050 A CN 202110499050A CN 115303311 A CN115303311 A CN 115303311A
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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
Abstract
The application relates to a control method of a heat pump air conditioning unit, an electronic device and a storage medium, wherein the control method comprises the following steps: acquiring running state information of a railway vehicle, and determining a target running mode corresponding to a heat pump air conditioning unit according to the running state information, wherein the target running mode sets initial air volume of an EC axial flow fan in running; after the corresponding target operation mode is determined, acquiring first high pressure on the exhaust side of the compressor, and judging whether the first high pressure is in a first preset high pressure interval corresponding to the target operation mode; and determining a noise reduction mode corresponding to the judgment result according to the judgment result of judging whether the first high-pressure is in the first preset high-pressure interval, and controlling the EC axial flow fan to work according to the corresponding noise reduction mode. Through the application, the problem that the noise of the railway vehicle is too large in the operation process due to the fact that the heat pump air conditioning unit is not effectively controlled in the related technology is solved, and the operation noise of the railway vehicle is reduced.
Description
Technical Field
The present disclosure relates to the field of air conditioning units for rail vehicles, and more particularly, to a control method, an electronic device, and a storage medium for a heat pump air conditioning unit.
Background
With the rapid development of urban rail transit, air conditioners are used as important auxiliary equipment for guaranteeing the comfort of vehicles, higher and higher requirements are put forward for heat pump air conditioning units applied to rail vehicles in the related technology, and research on energy conservation and noise reduction of the heat pump air conditioning units of the rail vehicles becomes an industrial theme.
In the related technology, as the requirement of the rail vehicle on the operation limit working condition is higher and higher, the heat exchange equipment and the fan adapt to the requirement of the limit working condition by increasing the specification, and the resource waste is caused by replacing the heat exchange equipment and the fan and increasing the specification of the heat exchange equipment and the fan; meanwhile, the heat pump air conditioning unit of the rail vehicle with the changed specification is not effectively controlled in the related technology, so that the problem of overlarge noise of the rail vehicle in the operation process is caused.
Aiming at the problem that the noise of a railway vehicle is too large in the running process because a heat pump air conditioning unit is not effectively controlled in the related technology, an effective solution is not provided at present.
Disclosure of Invention
The embodiment provides a control method of a heat pump air conditioning unit, an electronic device and a storage medium, so as to solve the problem that the noise of a railway vehicle is too large in the running process because the heat pump air conditioning unit is not effectively controlled in the related art.
In a first aspect, in this embodiment, a method for controlling a heat pump air conditioning unit is provided, where the heat pump air conditioning unit is applied to a rail vehicle, the heat pump air conditioning unit includes a control unit, and a compressor and an EC axial flow fan that are respectively connected to the control unit in a control manner, and the EC axial flow fan is disposed on a condenser of the heat pump air conditioning unit, and the method includes: the control unit acquires running state information of a rail vehicle and determines a target running mode corresponding to the heat pump air conditioning unit according to the running state information, wherein the target running mode sets initial air volume of the EC axial flow fan during running; the control unit acquires a first high-pressure at the exhaust side of the compressor after determining the corresponding target operation mode, and judges whether the first high-pressure is in a first preset high-pressure interval corresponding to the target operation mode; and the control unit determines a noise reduction mode corresponding to the judgment result according to the judgment result of judging whether the first high-pressure is in the first preset high-pressure interval, and controls the EC axial flow fan to work according to the corresponding noise reduction mode, wherein the noise reduction mode is correspondingly provided with air volume adjusting parameters of the EC axial flow fan.
In some of these embodiments, the operational status information includes operational segment information, and determining the target operational mode from the operational status information includes: the control unit acquires a first preset parameter table, wherein the first preset parameter table comprises corresponding relation information of the running road section information and a first running mode running when the rail vehicle runs to a corresponding road section; the control unit inquires the corresponding first operation mode in the first preset parameter table according to the operation road section information and determines that the target operation mode comprises the first operation mode.
In some of these embodiments, the operating state information includes operating position information, and determining the target operating mode from the operating state information includes: the control unit determines whether a first signal that the railway vehicle arrives at a station is received; the control unit acquires the running position information under the condition that the first signal is determined to be received, and determines whether the rail vehicle enters the station or not according to the running position information; the control unit determines that the target operation mode includes a station entering mode when it is determined that the rail vehicle enters the station.
In some of these embodiments, after determining that the target operating mode comprises an inbound mode, the control method further comprises: the control unit determines whether a second signal of the rail vehicle leaving the station is received or not, and determines that the heat pump air conditioning unit exits from the station entering mode when the second signal is received and the rail vehicle leaving the station is determined according to the operation position information; and the control unit determines that the heat pump air conditioning unit maintains to operate the inbound mode under the condition that the second signal is not received.
In some embodiments, the air volume adjusting parameter includes an air volume adjusting manner, and the determining, by the control unit according to a determination result of determining whether the first high-pressure is in the first preset high-pressure interval, a noise reduction mode corresponding to the determination result includes: the control unit detects whether the first high pressure falls to the first preset high pressure interval or not; and the control unit determines the air volume adjusting mode corresponding to the noise reduction mode according to a result of checking whether the first high-pressure falls to the first preset high-pressure interval, adjusts the rotating speed of the EC axial flow fan according to the air volume adjusting mode, and adjusts the first high-pressure to the first preset high-pressure interval, wherein the air volume adjusting mode comprises air volume reduction and air volume increase.
In some embodiments, the determining, by the control unit, the air volume adjustment manner corresponding to the noise reduction mode according to a result of checking whether the first high pressure falls within the first preset high pressure range, and adjusting the rotation speed of the EC axial flow fan according to the air volume adjustment manner includes: when the control unit detects that the first high-pressure does not fall into the first preset high-pressure interval, determining that the air volume adjusting mode comprises increasing the air volume, increasing the rotating speed of the EC axial flow fan according to a preset rotating speed increasing value, and controlling the EC axial flow fan to operate according to the increased first rotating speed; the control unit controls the EC axial flow fan to operate at the rated maximum rotating speed when detecting that the rotating speed of the EC axial flow fan is increased to the rated maximum rotating speed and the first high-pressure does not fall to the first preset high-pressure interval; when detecting that the first high-pressure is in the first preset high-pressure interval, the control unit controls the EC axial flow fan to operate at a current third rotating speed; and when the control unit detects that the first high-pressure is smaller than the lower limit of the first preset high-pressure interval, determining the air volume adjusting mode to comprise air volume reduction, reducing the rotating speed of the EC axial flow fan according to a preset rotating speed drop value, and controlling the EC axial flow fan to operate according to a reduced second rotating speed.
In some embodiments, adjusting the rotation speed of the EC axial flow fan according to the air volume adjustment manner includes: and the control unit performs PID control on the rotating speed of the EC axial flow fan according to the rotating speed adjusting parameter of the air volume adjusting mode.
In some of these embodiments, the control method further comprises: when the control unit detects that the first high-pressure is larger than a preset high-pressure protection threshold value, the control unit controls the EC axial flow fan to operate at full speed, and the first high-pressure is reduced to a second preset high-pressure interval.
In some of these embodiments, after the EC axial flow fan is operated at full speed, the control method further includes: the control unit detects the running time of the EC axial flow fan after full-speed running, and controls the heat pump air conditioning unit to exit the current running target running mode and run one of the target running modes when the running time is detected to be greater than a first preset time.
In a second aspect, in this embodiment, an electronic device is provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the processor implements the control method of the heat pump air conditioning unit according to the first aspect.
In a third aspect, in the present embodiment, there is provided a storage medium having stored thereon a computer program which, when executed by a processor, implements the control method of the heat pump air conditioning unit according to the first aspect described above.
Compared with the related art, the control method, the electronic device and the storage medium of the heat pump air conditioning unit provided in the embodiment determine the target operation mode corresponding to the heat pump air conditioning unit according to the operation state information by acquiring the operation state information of the rail vehicle, wherein the target operation mode sets the initial air volume of the EC axial flow fan during operation; after the corresponding target operation mode is determined, acquiring first high pressure at the exhaust side of the compressor, and judging whether the first high pressure is in a first preset high pressure interval corresponding to the target operation mode; according to the judgment result of judging whether the first high pressure is in the first preset high pressure interval or not, determining a noise reduction mode corresponding to the judgment result, and controlling the EC axial flow fan to work according to the corresponding noise reduction mode, wherein the noise reduction mode is correspondingly provided with an air volume adjusting parameter of the EC axial flow fan, so that the problem that the heat pump air conditioning unit is not effectively controlled in the related technology to cause overlarge noise of the railway vehicle in the running process is solved, the running mode is set as required, the heat pump controls the low air volume running of the related fan of the unit, and the running noise of the railway vehicle is reduced.
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a structural view of a heat pump air conditioning unit according to an embodiment of the present application;
fig. 2 is a flowchart of a control method of the heat pump air conditioning unit of the embodiment;
FIG. 3 is a flow chart of a silent mode of operation according to a preferred embodiment of the present application;
fig. 4 is a flow chart of an inbound mode according to the preferred embodiment of the present application.
Detailed Description
For a clearer understanding of the objects, aspects and advantages of the present application, reference is made to the following description and accompanying drawings.
Unless defined otherwise, technical or scientific terms referred to herein shall have the same general meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a" and "an" and "the" and similar referents in the context of describing the invention (including a reference to the context of the specification and claims) are to be construed to cover both the singular and the plural, as well as the singular and plural. The terms "comprises," "comprising," "has," "having" and any variations thereof, as referred to in this application, are intended to cover non-exclusive inclusions; for example, a process, method, and system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or modules, but may include other steps or modules (elements) not listed or inherent to such process, method, article, or apparatus. Reference throughout this application to "connected," "coupled," and the like is not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference to "a plurality" in this application means two or more. "and/or" describes the association relationship of the associated object, indicating that there may be three relationships, for example, "a and/or B" may indicate: a exists alone, A and B exist simultaneously, and B exists alone. In general, the character "/" indicates a relationship in which the objects associated before and after are an "or". Reference in the present application to the terms "first," "second," "third," etc., merely distinguish between similar objects and do not denote a particular order or importance to the objects.
Fig. 1 is a structural view of a heat pump air conditioning unit according to an embodiment of the present application. As shown in fig. 1, the heat pump air conditioning unit of the embodiment of the present application at least includes a compressor 1 and an EC axial flow fan 2 (corresponding to a condensing fan), in this embodiment, the EC axial flow fan 2 is disposed on a condenser 3 of the heat pump air conditioning unit, and meanwhile, in order to meet the requirement that the heat pump air conditioning unit can operate, the heat pump air conditioning unit further includes a blower 4, an evaporator 5, a frequency converter 6, an air purifier 7, an air return valve 8, a fresh air pressure wave valve 9, a four-way reversing valve 10, a gas-liquid separator 11, a waste exhaust pressure wave valve 12, and a waste exhaust valve 13, and the blower 4 is disposed on the evaporator 5. The heat pump air conditioning unit in the embodiment of the present application is configured by arranging the EC axial flow fan 2 in the embodiment of the present application on the existing heat pump air conditioning unit, and therefore, the air conditioning unit that can perform cooling or heating for the rail vehicle is suitable for the heat pump air conditioning unit in the embodiment of the present application. Meanwhile, a control unit for executing the control method in the embodiment of the present application is not shown in fig. 1, the control unit is electrically connected with the compressor 1 and the EC axial flow fan 2 in a control manner, and the EC axial flow fan 2 is controlled by the control unit in the embodiment of the present application to operate at a set low air volume, so that the noise of the operation of the rail vehicle is reduced.
It should be noted that the EC axial flow fan in the embodiment of the present application may directly use an ac power supply, and the EC axial flow fan has an RS485 output interface, a 0-10V sensor output interface, a 4-20mA speed regulation switch output interface, an alarm device output interface, and a master-slave signal output interface, and the EC axial flow fan has high intelligence, high energy saving, high efficiency, long service life, small vibration, low noise, and continuous uninterrupted operation; meanwhile, the EC axial flow fan can adopt a pulse width adjustment mode to carry out speed regulation, thereby realizing stepless speed regulation.
In this embodiment, a control method for a heat pump air conditioning unit is provided, which is applied to the heat pump air conditioning unit shown in fig. 1, where the heat pump air conditioning unit shown in fig. 1 is installed in a rail vehicle, the control method for the heat pump air conditioning unit provided in the embodiment of the present application is implemented during operation of the rail vehicle, fig. 2 is a flowchart of the control method for the heat pump air conditioning unit of this embodiment, and as shown in fig. 2, the flowchart includes the following steps:
step S201, the control unit obtains running state information of the rail vehicle and determines a target running mode corresponding to the heat pump air conditioning unit according to the running state information, wherein the target running mode sets initial air volume of the EC axial flow fan during running.
In this embodiment, the running state information includes road spectrum information, positioning information, running time period information, and running position information of the running of the rail vehicle, and the target running mode includes a silent running mode, an inbound mode, and an efficient running mode; in this embodiment, the different operation modes are set as required by the operator of the rail vehicle, and are set according to the operation time period, the operation road spectrum and the operation position or scene judged by the positioning system of the rail vehicle; meanwhile, the rotating speed of the EC axial flow fan is set in different running modes, and the corresponding air volume is determined by setting the rotating speed. Meanwhile, in this embodiment, the determination of the target operation mode is that the operation of the heat pump air conditioning unit is controlled according to the target operation mode when the rail vehicle runs to a set situation in the running process, for example: when the rail vehicle enters the station, the control unit controls the heat pump air conditioning unit according to the station entering mode, and the rotating speed and the air volume of the EC axial flow fan are adjusted by judging set parameters, so that the running noise of the rail vehicle is reduced.
In this embodiment, each target operation mode at least sets an initial air volume when the EC axial flow fan operates, and also sets a target pressure interval for controlling and judging the air volume of the EC axial flow fan in each target operation mode, where the target pressure interval is a target pressure that the exhaust side of the compressor needs to reach when the heat pump air conditioning unit is limited to operate in the corresponding target operation mode.
In step S202, after determining the corresponding target operation mode, the control unit obtains a first high pressure at the discharge side of the compressor, and determines whether the first high pressure is in a first preset high pressure interval corresponding to the target operation mode.
In this embodiment, the first preset high-pressure interval is different target high-pressure pressures at the exhaust side of the compressor set in different target operation modes in the embodiment of the present application, and the EC axial flow fan is controlled to adjust the air volume (rotation speed) according to the target high-pressure pressures in the corresponding target operation modes according to the preset corresponding target high-pressure pressures.
In the embodiment, the heat pump air conditioning unit is usually operated in a silent operation mode, and meanwhile, a station entering mode is configured in the silent operation mode; in the present embodiment, the silent operation mode sets the first preset high-pressure interval as [ P1- Δ P ] 1 ，P1+△p 1 ]When the first high pressure is greater than P1 +. DELTA.p 1 Increasing the rotating speed of the EC axial flow fan, and when the first high-pressure is less than P1-delta P 1 When the first high-pressure is in [ P1-delta P ], the rotating speed of the EC axial flow fan is reduced 1 ，P1+△p 1 ]If so, maintaining the current rotating speed of the EC axial flow fan to operate; corresponding to P1 value and DeltaP 1 The value can be set in segments according to the ambient temperature; in this embodiment, the station entering mode is set to have the first preset high-pressure interval [ P2- Δ P [ ] 2 ，P2+△p 2 ]Based on [ P2- Δ P ] in inbound mode 2 ，P2+△p 2 ]Correspondingly controlling the rotating speed of the EC axial flow fan; meanwhile, in the embodiment, in the silent operation mode, in order to maintain the stable operation of the heat pump air conditioning unit, a high pressure maintaining mode is set, and the corresponding second preset high pressure interval is [ P1-a, P3 ]]When the first high-pressure is higher than the P3, starting a high pressure maintaining mode, and reducing the first high-pressure to P1-A by controlling the EC axial flow fan to operate at full speed at the moment, wherein the value of A can be determined according to the first high-pressure value and the preset pressure reduction rate when the heat pump air conditioning unit operates stably under different test conditions; in this embodiment, a time determination mode is further set, and when the time duration t of the full-speed operation of the EC axial flow fan is greater than the preset time t 1 When the operation is finished, returning to a mute operation mode; in the station entering mode, in order to ensure the reliable operation of the heat pump air conditioning unit, a high pressure maintaining mode is also set, and the corresponding second preset high pressure interval is [ P2, P3 ]]When the first high-pressure is higher than P3, starting a high pressure maintaining mode, controlling the EC axial flow fan to run at full speed, and after the first high-pressure is reduced to P2, exiting the high pressure maintaining mode and returning to the station entering mode; in the present embodiment, P3 > P2 > P1.
In this embodiment, a high-efficiency operation mode is further set, and in the high-efficiency operation mode, the energy efficiency ratio tends to be improved more, and the first preset high-pressure interval is set as follows: [ P4-. DELTA.p 4 ，P4+△p 4 ]And the selection of the first preset high-pressure interval in the high-efficiency operation mode takes the energy efficiency ratio as the priority, so that P4 is less than P1, and the corresponding control process of the EC axial flow fan is the same as the control process of the EC axial flow fan in the mute mode.
Step S203, the control unit determines a noise reduction mode corresponding to the judgment result according to the judgment result of judging whether the first high pressure is in the first preset high pressure interval, and controls the EC axial flow fan to work according to the corresponding noise reduction mode, wherein the noise reduction mode is correspondingly provided with air volume adjusting parameters of the EC axial flow fan.
In the embodiment of the application, the first preset high-pressure interval is determined according to the air supply temperature and the environment temperature of the heat pump air conditioning unit under different test conditions, and meanwhile, the pressure of the EC axial flow fan during stable operation and the high-pressure of the exhaust side of the compressor are measured under different working condition test conditions when the air volume of the EC axial flow fan changes, so that the compressor can construct a pressure difference between the exhaust side and the suction side, the low-pressure is ensured to be at a set safety value, meanwhile, the EC axial flow fan is ensured to operate at low air volume, and the operation noise is reduced.
In this embodiment, after determining the corresponding determination result, the air volume (rotation speed) of the EC axial flow fan is correspondingly controlled, that is, controlling the EC axial flow fan to operate in the corresponding noise reduction mode at least includes controlling the air volume of the EC axial flow fan; in this embodiment of the present application, the judgment on the air volume adjustment of the EC axial flow fan is that the first high pressure on the exhaust side is compared with a first preset target high pressure, and when the first high pressure on the exhaust side exceeds a first preset target high pressure interval, the rotation speed of the EC axial flow fan is adjusted, specifically, when the first high pressure is greater than an upper limit of the first preset target high pressure interval, the rotation speed of the EC axial flow fan is increased, and when the first high pressure is lower than a lower limit of the first preset target high pressure interval, the rotation speed of the EC axial flow fan is decreased.
Through the steps S201 to S203, the target operation mode corresponding to the heat pump air conditioning unit is determined by acquiring the operation state information of the rail vehicle and according to the operation state information; after the corresponding target operation mode is determined, acquiring first high pressure at the exhaust side of the compressor, and judging whether the first high pressure is in a first preset high pressure interval corresponding to the target operation mode; the control unit determines a noise reduction mode corresponding to the judgment result according to the judgment result of judging whether the first high-pressure is in the first preset high-pressure interval or not, and controls the EC axial flow fan to work according to the corresponding noise reduction mode, so that the problem that the heat pump air conditioning unit is not effectively controlled in the related technology, the noise of the rail vehicle is overlarge in the operation process is solved, the operation mode is set as required, the related fans of the heat pump air conditioning unit operate at low air volume, and the operation noise of the rail vehicle is reduced.
In some embodiments, the operation state information includes operation section information, and the determining the target operation mode according to the operation state information is implemented by:
the method comprises the following steps that step 1, a control unit obtains a first preset parameter table, wherein the first preset parameter table comprises information of a running road section and corresponding relation information of a first running mode running when a rail vehicle runs to the corresponding road section.
In the embodiment, the first preset parameter table is preset and set according to running conditions of different rail vehicles. For example: when the rail vehicle A is set to operate in the W section of the line X, a first operation mode of the heat pump air conditioning unit of the rail vehicle is defined, such as: a silent mode of operation.
In this embodiment, the first operation mode includes at least a silent operation mode and an efficient operation mode.
And 2, the control unit inquires a corresponding first operation mode in the first preset parameter table according to the operation road section information and determines that the target operation mode comprises the first operation mode.
In this embodiment, when the rail vehicle runs to a set running section, the control unit obtains the information of the running section, and determines the target running mode by querying the corresponding first running mode in the first preset parameter table.
Acquiring a first preset parameter table in the steps; the corresponding first operation mode is inquired in the first preset parameter table according to the operation road section information, the target operation mode including the first operation mode is determined, the target operation mode is determined according to the operation state information of the railway vehicle, the mode selection setting according to the requirement is achieved, the EC axial flow fan of the heat pump air conditioning unit is enabled to operate correspondingly to the low air volume through the selected set operation mode, and the operation noise is reduced.
In some embodiments, the operation state information includes operation position information, and determining the target operation mode according to the operation state information is implemented by:
step 1, the control unit determines whether a first signal that the rail vehicle arrives at the station is received.
In this embodiment, the mode of operation of the control unit is often set to a silent mode of operation before the first signal is received.
And 2, the control unit acquires the running position information under the condition of determining that the first signal is received, and determines whether the rail vehicle enters the station or not according to the running position information.
In this embodiment, the control unit determines whether the rail vehicle has arrived at the station according to the operation position information upon receiving the first signal (arrival signal), thereby determining the corresponding operation mode.
And 3, determining that the target operation mode comprises an entrance mode by the control unit under the condition of determining that the rail vehicle enters the station.
Determining whether a first signal of the rail vehicle entering the station is received or not through the step; under the condition that the first signal is determined to be received, acquiring running position information, and determining whether the rail vehicle enters the station or not according to the running position information; under the condition that the rail vehicle is determined to enter the station, the target operation mode is determined to comprise the station entering mode, the judgment of the target operation mode according to the station entering signal and the operation position information is realized, the selected target operation mode is determined, the EC axial flow fan of the heat pump air conditioning unit is enabled to operate correspondingly to low air volume, and the operation noise is reduced.
In some embodiments, after determining that the target operation mode comprises the inbound mode, further performing the steps of:
step 1, the control unit determines whether a second signal of the rail vehicle going out is received, and determines that the heat pump air conditioning unit exits the operation entering mode under the condition that the second signal is received and the rail vehicle is determined to go out according to the operation position information.
In this embodiment, if it is detected that the rail vehicle has left the station, the silent running mode is returned.
And 2, determining that the heat pump air conditioning unit maintains the operation station entering mode under the condition that the control unit does not receive the second signal.
In some embodiments, the air volume adjusting parameter includes an air volume adjusting mode, and the control unit determines, according to a determination result that whether the first high-pressure is in the first preset high-pressure interval, a noise reduction mode corresponding to the determination result by:
step 1, a control unit detects whether the first high-pressure falls to a first preset high-pressure interval.
And 2, determining an air volume adjusting mode corresponding to the noise reduction mode by the control unit according to a result of checking whether the first high-pressure falls into a first preset high-pressure interval, adjusting the rotating speed of the EC axial flow fan according to the air volume adjusting mode, and adjusting the first high-pressure to the first preset high-pressure interval, wherein the air volume adjusting mode comprises air volume reduction and air volume increase.
In this embodiment, the first high pressure at the exhaust side is greater than the preset target high pressure, and the EC axial flow fan operates based on the current rotation speed, and the EC axial flow fan operates at the current rotation speed, which will cause the first high pressure at the exhaust side to decrease.
In this embodiment, in the operation process of the EC axial flow fan, although the first high pressure at the exhaust side may decrease, the first high pressure at the exhaust side may not fall within the first preset high pressure interval within a period of time, and therefore, the rotation speed of the EC axial flow fan needs to be increased, so that the first high pressure at the exhaust side rapidly decreases to the first preset high pressure interval; after the first high-pressure at the exhaust side is reduced to a first preset high-pressure interval, the first high-pressure at the exhaust side is reduced to be maintained in the first preset high-pressure interval or lower than the lower limit of the first preset high-pressure interval due to the operation of the EC axial flow fan, at the moment, the rotating speed of the EC axial flow fan needs to be controlled and reduced, so that the reduced pressure value of the first high-pressure at the exhaust side generated by the operation of the EC axial flow fan is not greater than the increased value of the high-pressure at the exhaust side generated by the operation of the compressor, thus the pressure difference between the exhaust side and the suction side of the compressor is ensured, the EC axial flow fan is maintained to operate at the lowest rotating speed, the minimum air volume is provided, and the operation noise is reduced.
In this embodiment, since the air volume (rotation speed) of the EC axial flow fan is controlled to adjust the first high pressure on the exhaust side, in this embodiment, the air volume adjustment manner is set to correspond to a preset rotation speed increase value and a preset rotation speed drop value.
Detecting whether the first high-pressure falls to a first preset high-pressure interval or not in the steps; according to the result of checking whether the first high pressure falls into the first preset high pressure interval or not, the air volume adjusting mode corresponding to the noise reduction mode is determined, the rotating speed of the EC axial flow fan is adjusted according to the air volume adjusting mode, the first high pressure is adjusted to the first preset high pressure interval, the rotating speed of the EC axial flow fan is adjusted according to the comparison result of the first high pressure on the exhaust side and the target high pressure, the condition that the EC axial flow fan operates at the lowest rotating speed while the pressure difference between the exhaust side and the suction side of the compressor is ensured, the minimum air volume is provided, and the operation noise is reduced.
In some embodiments, the control unit determines an air volume adjustment mode corresponding to the noise reduction mode according to a result of checking whether the first high-pressure falls into a first preset high-pressure range, and adjusts the rotation speed of the EC axial flow fan according to the air volume adjustment mode by the following steps:
step 1, when detecting that the first high-pressure does not fall into a first preset high-pressure interval, a control unit determines an air volume adjusting mode including increasing air volume, increasing the rotating speed of the EC axial flow fan according to a preset rotating speed increasing value, and controlling the EC axial flow fan to operate according to the increased first rotating speed until the first high-pressure is reduced to the first preset high-pressure interval.
In this embodiment, when the first high-pressure is higher than the upper limit of the first preset high-pressure interval, the rotation speed of the EC axial flow fan is increased according to the preset rotation speed increase value, so as to increase the air volume of the EC axial flow fan.
And step 2, when detecting that the rotating speed of the EC axial flow fan is increased to the rated maximum rotating speed and the first high-pressure does not fall into a first preset high-pressure interval, the control unit controls the EC axial flow fan to operate at the rated maximum rotating speed.
In this embodiment, when the first raised rotation speed is raised to the maximum rotation speed, but the control unit detects that the first high-pressure cannot be reduced to the first preset high-pressure interval, the EC axial flow fan is controlled to keep the maximum rotation speed. And 3, controlling the EC axial flow fan to operate at the current third rotating speed by the control unit when detecting that the first high-pressure is in the first preset high-pressure interval.
And 4, when detecting that the first high-pressure is smaller than the lower limit value of the first preset high-pressure interval, the control unit determines an air volume adjusting mode including air volume reduction, reduces the rotating speed of the EC axial flow fan according to a preset rotating speed drop value, and controls the EC axial flow fan to operate according to the reduced second rotating speed.
In this embodiment, after the first high pressure is reduced to the lower limit value of the first preset high pressure interval, due to the operation of the EC axial flow fan, the first high pressure is reduced to a point where the pressure difference between the exhaust side and the suction side of the compressor is lower than the safety value, and the heat pump air conditioning unit is subjected to low pressure protection, at this point, the rotation speed of the EC axial flow fan needs to be controlled to be reduced, so that the reduced pressure value of the exhaust side high pressure generated by the operation of the EC axial flow fan is not greater than the increased value of the exhaust side high pressure generated by the operation of the compressor, so that the first high pressure is increased to be maintained in the first preset high pressure interval, the EC axial flow fan is maintained to operate at a low air volume, and the operation noise is low.
In this embodiment, the third rotation speed is a rotation speed at which the current EC axial flow fan operates, and the rotation speed may be one of the first rotation speed and the second rotation speed.
In some embodiments, the adjustment of the rotating speed of the EC axial flow fan according to the air volume adjustment manner is realized by: and the control unit performs PID control on the rotating speed of the EC axial flow fan according to an air volume adjusting mode (noise reduction mode).
In the embodiment, the PID control is adopted to realize the accurate control of the rotating speed of the EC axial flow fan and the stepless speed regulation.
In some of these embodiments, the following steps are also implemented: when the control unit detects that the first high-pressure is larger than the preset high-pressure protection threshold value, the control unit controls the EC axial flow fan to operate at full speed, and the first high-pressure is reduced to a lower limit value of a second preset high-pressure interval.
In the embodiment, in order to maintain the reliable operation of the heat pump air conditioning unit, by setting a high-pressure exit mode, when the first high-pressure is greater than the high-pressure protection value, the EC axial flow fan is controlled to operate at full speed until the first high-pressure is reduced to a corresponding second preset high-pressure interval; in this embodiment, the upper limit of the second preset high-pressure interval is the same in the silent operation mode and the station entering mode, and is a set preset high-pressure protection threshold, but the lower limit of the second preset high-pressure interval is different in the silent operation mode and the station entering mode, in the silent operation mode, the lower limit of the second preset high-pressure interval is lower than the lower limit of the first preset high-pressure interval corresponding to the silent operation mode, and in the station entering mode, the lower limit of the second preset high-pressure interval corresponds to the lower limit of the first preset high-pressure interval corresponding to the station entering mode.
In some of these embodiments, after the EC axial flow fan is operated at full speed, the following steps are also performed: the control unit detects the running time of the EC axial flow fan after full-speed running, and controls the heat pump air conditioning unit to exit from the current running target running mode and run one corresponding target running mode in the target running modes when the running time is detected to be greater than first preset time.
In this embodiment, by setting the time exit mode, after the EC axial flow fan operates at full speed for the preset time threshold, the heat pump air conditioning unit is controlled to exit the target operation mode of the current operation, and to return to the target operation mode corresponding to the operation, in this embodiment, the return operation is a silent operation mode.
Fig. 3 is a flowchart of the mute operation mode according to the preferred embodiment of the present application, and as shown in fig. 3, the flowchart includes:
step S301, judging whether an inbound signal is received, if so, executing step S302, otherwise, executing step S303.
Step S302 is executed to enter the station mode, and then step S309 is executed.
Step S303, according to the set third preset target high pressure P 1-3 The rotational speed adjustment is performed, and then step S304 is executed.
Step S304, determining whether the first high pressure is greater than a first predetermined high pressure maintaining target value P 3-3 If so, step S305 is executed, otherwise, step S303 is executed.
Step S305, the EC axial flow fan is controlled to run at full speed, and then step S306 is executed.
Step S306, judging whether the first high pressure is smaller than a second preset high-pressure-maintaining lower limit value P 3-3 -a, if yes, performing step S303, otherwise, performing step S307.
Step S307, judging whether the time t of the full-speed running of the EC axial flow fan is more than a second preset time t 1-3 If yes, step S308 is executed, otherwise, step S306 is executed.
Step S308, judging whether the first high pressure is smaller than a preset third preset target high pressure P 1-3 If so, step S303 is executed, otherwise, step S305 is executed.
Step S309, judging whether an outbound signal is received, if so, returning to a mute operation mode, otherwise, executing step S302.
Fig. 4 is a flowchart of the inbound mode according to the preferred embodiment of the present application, and as shown in fig. 4, the flowchart includes:
step S401, according to the set fourth preset target high-pressure P 1-4 The rotational speed adjustment is performed, and then step S402 is executed.
Step S402, judging whether the first high pressure is larger than a third preset high pressure maintaining target value P 3-4 If so, step S403 is executed, otherwise, step S401 is executed.
And S403, controlling the EC axial flow fan to run at full speed, and then executing S404.
Step S404, judging the first high pressureWhether or not it is less than the fourth preset target high-pressure P 1-4 If yes, step S401 is executed, otherwise, step S403 is executed.
There is also provided in this embodiment an electronic device comprising a memory having a computer program stored therein and a processor configured to execute the computer program to perform the steps of any of the method embodiments described above.
Optionally, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
Optionally, in this embodiment, the processor may be configured to execute the following steps by a computer program:
s1, obtaining running state information of the rail vehicle, and determining a target running mode corresponding to the heat pump air conditioning unit according to the running state information.
And S2, after the corresponding target operation mode is determined, acquiring first high pressure on the exhaust side of the compressor, and judging whether the first high pressure is in a first preset high pressure interval corresponding to the target operation mode.
And S3, determining a noise reduction mode corresponding to the judgment result according to the judgment result of judging whether the first high-pressure is in the first preset high-pressure interval, and controlling the EC axial flow fan to work according to the corresponding noise reduction mode.
It should be noted that, for specific examples in this embodiment, reference may be made to the examples described in the foregoing embodiment and optional implementation manners, and details are not described in this embodiment again.
In addition, in combination with the control method of the heat pump air conditioning unit provided in the foregoing embodiment, a storage medium may also be provided in this embodiment. The storage medium has a computer program stored thereon; the computer program, when executed by a processor, implements the method of controlling a heat pump air conditioning unit of any of the above embodiments.
It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to be limiting. All other embodiments, which can be derived by a person skilled in the art from the examples provided herein without any inventive step, shall fall within the scope of protection of the present application.
It is obvious that the drawings are only examples or embodiments of the present application, and it is obvious to those skilled in the art that the present application can be applied to other similar cases according to the drawings without creative efforts. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
The term "embodiment" is used herein to mean that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is to be expressly and implicitly understood by one of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the patent protection. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (11)
1. A control method of a heat pump air conditioning unit is provided, the heat pump air conditioning unit is applied to a rail vehicle, the heat pump air conditioning unit comprises a control unit, a compressor and an EC axial flow fan, the compressor and the EC axial flow fan are respectively connected with the control unit in a control mode, the EC axial flow fan is arranged on a condenser of the heat pump air conditioning unit, and the control method is characterized by comprising the following steps:
the control unit acquires running state information of a rail vehicle and determines a target running mode corresponding to the heat pump air conditioning unit according to the running state information, wherein the target running mode sets initial air volume of the EC axial flow fan during running;
the control unit acquires a first high-pressure at the exhaust side of the compressor after determining the corresponding target operation mode, and judges whether the first high-pressure is in a first preset high-pressure interval corresponding to the target operation mode;
and the control unit determines a noise reduction mode corresponding to the judgment result according to the judgment result of judging whether the first high-pressure is in the first preset high-pressure interval, and controls the EC axial flow fan to work according to the corresponding noise reduction mode, wherein the noise reduction mode is correspondingly provided with air volume adjusting parameters of the EC axial flow fan.
2. The heat pump air conditioning unit control method according to claim 1, wherein the operation state information includes operation section information, and determining the target operation mode according to the operation state information includes:
the control unit acquires a first preset parameter table, wherein the first preset parameter table comprises corresponding relation information of the running road section information and a first running mode running when the rail vehicle runs to a corresponding road section;
and the control unit inquires the corresponding first operation mode in the first preset parameter table according to the operation road section information and determines that the target operation mode comprises the first operation mode.
3. The heat pump air conditioning unit control method according to claim 1, wherein the operation state information includes operation position information, and determining the target operation mode according to the operation state information includes:
the control unit determines whether a first signal that the railway vehicle arrives at a station is received;
the control unit acquires the running position information under the condition of determining that the first signal is received, and determines whether the rail vehicle enters the station or not according to the running position information;
the control unit determines that the target operation mode includes an entry mode in a case where it is determined that the rail vehicle enters the station.
4. The heat pump air conditioning unit control method according to claim 3, wherein after determining that the target operation mode includes an inbound mode, the control method further comprises:
the control unit determines whether a second signal of the railway vehicle going out is received or not, and determines that the heat pump air conditioning unit exits from the entering mode when the second signal is received and the railway vehicle is determined to be out according to the running position information;
and the control unit determines that the heat pump air conditioning unit maintains to operate the inbound mode under the condition that the second signal is not received.
5. The control method of the heat pump air conditioning unit according to claim 1, wherein the air volume adjustment parameter includes an air volume adjustment mode, and the determining, by the control unit, the noise reduction mode corresponding to the determination result according to the determination result of whether the first high pressure is in the first preset high pressure interval includes:
the control unit detects whether the first high-pressure falls to the first preset high-pressure interval or not;
and the control unit determines the air volume adjusting mode corresponding to the noise reduction mode according to a result of checking whether the first high-pressure falls to the first preset high-pressure interval, adjusts the rotating speed of the EC axial flow fan according to the air volume adjusting mode, and adjusts the first high-pressure to the first preset high-pressure interval, wherein the air volume adjusting mode comprises air volume reduction and air volume increase.
6. The control method of the heat pump air conditioning unit according to claim 5, wherein the determining, by the control unit, the air volume adjustment manner corresponding to the noise reduction mode according to the result of checking whether the first high pressure falls within the first preset high pressure interval, and the adjusting the rotation speed of the EC axial flow fan according to the air volume adjustment manner includes:
when the control unit detects that the first high-pressure does not fall into the first preset high-pressure interval, determining that the air volume adjusting mode comprises increasing the air volume, increasing the rotating speed of the EC axial flow fan according to a preset rotating speed increasing value, and controlling the EC axial flow fan to operate according to the increased first rotating speed;
when the control unit detects that the rotating speed of the EC axial flow fan is increased to a rated maximum rotating speed and the first high-pressure does not fall into the first preset high-pressure interval, the control unit controls the EC axial flow fan to operate at the rated maximum rotating speed;
when the control unit detects that the first high-pressure is in the first preset high-pressure interval, the control unit controls the EC axial flow fan to operate at a current third rotating speed;
and when the control unit detects that the first high-pressure is smaller than the lower limit of the first preset high-pressure interval, determining the air volume adjusting mode to comprise air volume reduction, reducing the rotating speed of the EC axial flow fan according to a preset rotating speed drop value, and controlling the EC axial flow fan to operate according to a reduced second rotating speed.
7. The heat pump air conditioning unit control method according to claim 5, wherein adjusting the rotation speed of the EC axial flow fan according to the air volume adjustment manner includes: and the control unit performs PID control on the rotating speed of the EC axial flow fan according to the rotating speed adjusting parameter of the air volume adjusting mode.
8. The control method of the heat pump air conditioning unit according to claim 1, characterized by further comprising: when the control unit detects that the first high-pressure is larger than a preset high-pressure protection threshold value, the control unit controls the EC axial flow fan to operate at full speed, and the first high-pressure is reduced to a second preset high-pressure interval.
9. The heat pump air conditioning unit control method according to claim 8, wherein after the EC axial flow fan is operated at full speed, the control method further comprises: the control unit detects the running time of the EC axial flow fan after full-speed running, and controls the heat pump air conditioning unit to exit the current running target running mode and run one of the target running modes when the running time is detected to be greater than a first preset time.
10. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to perform the control method of the heat pump air conditioning unit according to any one of claims 1 to 9.
11. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the control method of a heat pump air conditioning unit according to any one of claims 1 to 9.
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| CN202110499050.9A CN115303311A (en) | 2021-05-08 | 2021-05-08 | Control method of heat pump air conditioning unit, electronic device and storage medium |
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| CN202110499050.9A CN115303311A (en) | 2021-05-08 | 2021-05-08 | Control method of heat pump air conditioning unit, electronic device and storage medium |
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