Control Method, Electronic Device, and Storage Medium of Heat Pump Air Conditioning Unit

Abstract

The present application relates to a control method, an electronic device, and a storage medium for a heat pump air conditioner unit. The control method includes: obtaining the operating state information of a rail vehicle, and determining a corresponding target operating mode for the heat pump air conditioner unit according to the operating state information, where the target operating mode sets an initial air volume when an EC axial flow fan operates; after determining the corresponding target operating mode, obtaining a first high-pressure value on the exhaust side of a compressor, and determining whether the first high-pressure value is within a first preset high-pressure value range corresponding to the target operating mode; according to the determination result of whether the first high-pressure value is within the first preset high-pressure value range, determining a corresponding noise reduction mode, and controlling the EC axial flow fan to operate according to the corresponding noise reduction mode. Through the present application, the problem that the heat pump air conditioner unit is not effectively controlled in the related art, resulting in excessive noise during the operation of the rail vehicle, is solved, and the running noise of the rail vehicle is reduced.

Description

Technical Field

[0001] The present application relates to the field of air-conditioning units for rail vehicles, and in particular to a control method, an electronic device, and a storage medium for a heat pump air-conditioning unit. Background Art

[0002] With the rapid development of urban rail transit, air conditioners, as important auxiliary equipment to ensure vehicle comfort, have put forward higher and higher requirements for heat pump air-conditioning units applied to rail vehicles in related technologies. The research on energy conservation and noise reduction of heat pump air-conditioning units for rail vehicles has become the industry theme.

[0003] In related technologies, as the requirements for the operating extreme conditions of rail vehicles become higher and higher, heat exchange equipment and fans are enlarged in size to meet the requirements of extreme conditions. By replacing heat exchange equipment and fans and increasing the size of heat exchange equipment and fans, resource waste is caused; at the same time, in related technologies, the heat pump air-conditioning units of rail vehicles with changed specifications are not effectively controlled, resulting in excessive noise during the operation of rail vehicles.

[0004] Aiming at the problem that the heat pump air-conditioning unit is not effectively controlled in related technologies, resulting in excessive noise during the operation of rail vehicles, no effective solution has been proposed yet. Summary of the Invention

[0005] In this embodiment, a control method, an electronic device, and a storage medium for a heat pump air-conditioning unit are provided to solve the problem that the heat pump air-conditioning unit is not effectively controlled in related technologies, resulting in excessive noise during the operation of rail vehicles.

[0006] In a first aspect, in this embodiment, a control method for 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 includes a control unit, a compressor, and an EC axial-flow fan that are respectively connected to the control unit in a controlled manner. The EC axial-flow fan is arranged on the condenser of the heat pump air-conditioning unit. The control method includes: the control unit obtains the operating state information of the rail vehicle, and determines the corresponding target operating mode of the heat pump air-conditioning unit according to the operating state information, where the target operating mode sets the initial air volume when the EC axial-flow fan operates; after the control unit determines the corresponding target operating mode, it obtains the first high-pressure at the exhaust side of the compressor, and determines whether the first high-pressure is within a first preset high-pressure range corresponding to the target operating mode; the control unit determines a noise reduction mode corresponding to the judgment result according to the judgment result of determining whether the first high-pressure is within the first preset high-pressure range, and controls the EC axial-flow fan to operate according to the corresponding noise reduction mode, where the noise reduction mode corresponds to setting the air volume adjustment parameter of the EC axial-flow fan.

[0007] In some of these embodiments, the operating status information includes operating section information. Determining the target operating mode based on the operating status information includes: The control unit obtains a first preset parameter table, where the first preset parameter table includes the corresponding relationship information between the operating section information and the first operating mode in which the rail vehicle operates when it runs on the corresponding section; The control unit queries the corresponding first operating mode in the first preset parameter table according to the operating section information, and determines that the target operating mode includes the first operating mode.

[0008] In some of these embodiments, the operating status information includes operating position information. Determining the target operating mode based on the operating status information includes: The control unit determines whether it has received a first signal that the rail vehicle enters the station; When the control unit determines that it has received the first signal, it obtains the operating position information and determines whether the rail vehicle enters the station according to the operating position information; When the control unit determines that the rail vehicle enters the station, it determines that the target operating mode includes the station entry mode.

[0009] In some of these embodiments, after determining that the target operating mode includes the station entry mode, the control method further includes: The control unit determines whether it has received a second signal that the rail vehicle exits the station. When it has received the second signal and determines that the rail vehicle exits the station according to the operating position information, it determines that the heat pump air conditioner unit exits the operation of the station entry mode; When the control unit has not received the second signal, it determines that the heat pump air conditioner unit maintains the operation of the station entry mode.

[0010] In some of these embodiments, the air volume adjustment parameter includes the air volume adjustment method. The control unit determines the noise reduction mode corresponding to the judgment result according to the judgment result of whether the first high pressure is in the first preset high pressure range: The control unit detects whether the first high pressure drops to the first preset high pressure range; The control unit determines the air volume adjustment method corresponding to the noise reduction mode according to the result of checking whether the first high pressure drops to the first preset high pressure range, and adjusts the speed of the EC axial flow fan according to the air volume adjustment method to adjust the first high pressure to the first preset high pressure range, where the air volume adjustment methods include reducing the air volume and increasing the air volume.

[0011] In some of these embodiments, the control unit determines the air volume adjustment method corresponding to the noise reduction mode according to the result of checking whether the first high-pressure drops to the first preset high-pressure range, and adjusts the rotation speed of the EC axial flow fan according to the air volume adjustment method, including: when the control unit detects that the first high-pressure does not drop to the first preset high-pressure range, it determines that the air volume adjustment method includes increasing the air volume, increasing the rotation speed of the EC axial flow fan by a preset rotation speed increase value, and controlling the EC axial flow fan to operate at the increased first rotation speed; when the control unit detects that the rotation speed of the EC axial flow fan has increased to the rated maximum rotation speed and the first high-pressure does not drop to the first preset high-pressure range, it controls the EC axial flow fan to operate at the rated maximum rotation speed; when the control unit detects that the first high-pressure is within the first preset high-pressure range, it controls the EC axial flow fan to operate at the current third rotation speed; when the control unit detects that the first high-pressure is less than the lower limit of the first preset high-pressure range, it determines that the air volume adjustment method includes decreasing the air volume, decreasing the rotation speed of the EC axial flow fan by a preset rotation speed drop value, and controlling the EC axial flow fan to operate at the decreased second rotation speed.

[0012] In some of these embodiments, adjusting the rotation speed of the EC axial flow fan according to the air volume adjustment method includes: the control unit performing PID control on the rotation speed of the EC axial flow fan according to the rotation speed adjustment parameter of the air volume adjustment method.

[0013] In some of these embodiments, the control method further includes: when the control unit detects that the first high-pressure is greater than the preset high-pressure protection threshold, the control unit controls the EC axial flow fan to operate at full speed to reduce the first high-pressure to the second preset high-pressure range.

[0014] In some of these embodiments, after the EC axial flow fan operates at full speed, the control method further includes: the control unit detecting the operation time after the EC axial flow fan operates at full speed, and when detecting that the operation time is greater than the first preset time, controlling the heat pump air conditioner unit to exit the target operation mode in which it is currently operating and operate in one of the corresponding target operation modes.

[0015] In a second aspect, an electronic device is provided in this embodiment, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it implements the control method of the heat pump air conditioner unit described in the first aspect above.

[0016] In a third aspect, in the present embodiment, a storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, the control method of the heat pump air conditioner unit described in the above first aspect is implemented.

[0017] Compared with the related art, in the control method, electronic device and storage medium of the heat pump air conditioner unit provided in the present embodiment, by obtaining the operating state information of the rail vehicle and determining the corresponding target operating mode of the heat pump air conditioner unit according to the operating state information, wherein the target operating mode sets the initial air volume when the EC axial flow fan operates; after determining the corresponding target operating mode, obtaining the first high-pressure of the exhaust side of the compressor and judging whether the first high-pressure is in the first preset high-pressure range corresponding to the target operating mode; according to the judgment result of judging whether the first high-pressure is in the first preset high-pressure range, determining the 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 corresponds to setting the air volume adjustment parameter of the EC axial flow fan, the problem that the heat pump air conditioner unit is not effectively controlled in the related art, resulting in excessive noise during the operation of the rail vehicle is solved, realizing setting the operating mode as needed, the relevant fans of the heat pump control unit operate at a low air volume, and reducing the running noise of the rail vehicle.

[0018] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more comprehensible. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0020] Figure 1 is a structural view of the heat pump air conditioner unit according to an embodiment of the present application;

[0021] Figure 2 is a flowchart of the control method of the heat pump air conditioner unit in the present embodiment;

[0022] Figure 3 is a flowchart of the silent operation mode according to a preferred embodiment of the present application;

[0023] Figure 4 is a flowchart of the approach mode according to a preferred embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To understand the purpose, technical solution, and advantages of the present application more clearly, the present application will be described and illustrated below with reference to the drawings and embodiments.

[0025] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meanings understood by those with ordinary skills in the technical field to which this application belongs. In this application, words such as "a", "one", "a kind of", "the", "these" and the like do not indicate a limitation in quantity, and they can be singular or plural. The terms "including", "comprising", "having" and any variants thereof involved in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product or device including a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent in these processes, methods, products or devices. The terms "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "plurality" involved in this application means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, and B exists alone. Usually, the character " / " indicates that the objects associated before and after are in an "or" relationship. The terms "first", "second", "third" and the like involved in this application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0026] Figure 1 is a structural view of a heat pump air conditioner unit according to an embodiment of the present application. As Figure 1 shown, the heat pump air conditioner unit of the embodiment of the present application at least includes a compressor 1 and an EC axial flow fan 2 (corresponding to a condenser fan). In this embodiment, the EC axial flow fan 2 is arranged on the condenser 3 of the heat pump air conditioner unit. At the same time, to enable the heat pump air conditioner unit to operate, the heat pump air conditioner unit further includes a supply fan 4, an evaporator 5, an inverter 6, an air purifier 7, a return air valve 8, a fresh air pressure wave valve 9, a four-way reversing valve 10, a gas-liquid separator 11, a waste discharge pressure wave valve 12 and a waste exhaust air valve 13, and the supply fan 4 is arranged on the evaporator 5. The heat pump air conditioner unit in the embodiment of the present application is constituted by arranging the EC axial flow fan 2 in the embodiment of the present application on an existing heat pump air conditioner unit. Therefore, any air conditioner unit that can meet the requirements of refrigeration or heating for rail vehicles is suitable for the heat pump air conditioner unit in the embodiment of the present application. At the same time, the control unit that executes the control method in the embodiment of the present application is Figure 1 not shown. The control unit is electrically connected to the compressor 1 and the EC axial flow fan 2 for control. By controlling the EC axial flow fan 2 through the control unit in the embodiment of the present application, the EC axial flow fan 2 operates at a set low air volume, reducing the noise during the operation of the rail vehicle.

[0027] It should be noted that the EC axial flow fan in the embodiments of the present application can directly use an AC power supply. The EC axial flow fan is equipped with an RS485 output interface, a 0-10V sensor output interface, a 4-20mA speed control switch output interface, an alarm device output interface, and a master-slave signal output interface. The EC axial flow fan has high intelligence, high energy efficiency, high efficiency, long service life, small vibration, low noise, and can work continuously without interruption. At the same time, the EC axial flow fan can adopt a pulse width modulation method for speed regulation to achieve stepless speed regulation.

[0028] In this embodiment, a control method for a heat pump air conditioner unit is provided, which is applied to Figure 1 the heat pump air conditioner unit shown in Figure 1 The heat pump air conditioner unit shown is installed on a rail vehicle. The control method for the heat pump air conditioner unit provided in the embodiments of the present application is implemented during the operation of the rail vehicle. Figure 2 is a flowchart of the control method for the heat pump air conditioner unit in this embodiment. As Figure 2 shown, the process includes the following steps:

[0029] Step S201, the control unit obtains the operation state information of the rail vehicle, and determines the corresponding target operation mode of the heat pump air conditioner unit according to the operation state information, where the target operation mode sets the initial air volume when the EC axial flow fan operates.

[0030] In this embodiment, the operation state information includes the road spectrum information, positioning information, operation time period information, and operation position information of the rail vehicle. The target operation modes include a silent operation mode, a station entry mode, and a high-efficiency operation mode. In this embodiment, different operation modes are set according to the needs of the operator of the rail vehicle. At the same time, they can be set according to the operation time period of the rail vehicle, the operation road spectrum, and the operation position or scenario determined by the positioning system. At the same time, different operation modes set the rotation speed of the EC axial flow fan, and determine the corresponding air volume by setting the rotation speed. At the same time, in this embodiment, the determination of the target operation mode is that during the operation of the rail vehicle, when it runs to the set scenario, the operation of the heat pump air conditioner unit is controlled according to the target operation mode. For example, when the rail vehicle enters the station, the control unit controls the heat pump air conditioner unit according to the station entry mode, and adjusts the rotation speed and air volume of the EC axial flow fan by judging the set parameters, so as to reduce the noise during the operation of the rail vehicle.

[0031] In this embodiment, each target operation mode sets at least the initial air volume when the EC axial flow fan operates, and also sets the target pressure range for controlling and judging the air volume of the EC axial flow fan in each target operation mode. The target pressure range is the target pressure that the exhaust side of the compressor needs to reach when the heat pump air conditioner unit operates in the corresponding target operation mode.

[0032] In step S202, after determining the corresponding target operation mode, the control unit acquires the first high-pressure on the exhaust side of the compressor and determines whether the first high-pressure is within the first preset high-pressure range corresponding to the target operation mode.

[0033] In this embodiment, the first preset high-pressure range is the different target high-pressures on the exhaust side of the compressor set for different target operation modes in the embodiments of the present application. According to the preset corresponding target high-pressures, the EC axial-flow fan is controlled to adjust the air volume (rotation speed) according to the target high-pressure in the corresponding target operation mode.

[0034] In this embodiment, the heat pump air-conditioning unit often operates in the silent operation mode. At the same time, an approaching station mode is configured in the silent operation mode. In this embodiment, the first preset high-pressure range set for the silent operation mode is [P1 - Δp1, P1 + Δp1]. When the first high-pressure is greater than P1 + Δp1, the rotation speed of the EC axial-flow fan is increased. When the first high-pressure is less than P1 - Δp1, the rotation speed of the EC axial-flow fan is decreased. When the first high-pressure is within [P1 - Δp1, P1 + Δp1], the current rotation speed of the EC axial-flow fan is maintained. The corresponding values of P1 and ΔP1 can be set in segments according to the ambient temperature. In this embodiment, the first preset high-pressure range set for the approaching station mode is [P2 - Δp2, P2 + Δp2]. In the approaching station mode, the rotation speed of the EC axial-flow fan is controlled corresponding to [P2 - Δp2, P2 + Δp2]. At the same time, in this embodiment, in the silent operation mode, in order to maintain the stable operation of the heat pump air-conditioning unit, a high-pressure holding mode is set. The corresponding second preset high-pressure range is [P1 - A, P3], where P3 is the high-pressure protection value. When the first high-pressure is greater than P3, the high-pressure holding mode is started. At this time, by controlling the EC axial-flow fan to run at full speed, the first high-pressure is reduced to P1 - A. The value of A can be determined according to the first high-pressure value when the heat pump air-conditioning unit operates stably under different test conditions and the preset pressure reduction rate. In this embodiment, a time judgment mode is also set. When the running duration t of the EC axial-flow fan at full speed is greater than the preset time t1, the silent operation mode is returned. In the approaching station mode, in order to ensure the reliable operation of the heat pump air-conditioning unit, a high-pressure holding mode is also set. The corresponding second preset high-pressure range is [P2, P3]. When the first high-pressure is greater than P3, the high-pressure holding mode is started. The EC axial-flow fan is controlled to run at full speed until the first high-pressure is reduced to P2, and then the high-pressure holding mode is exited and the approaching station mode is returned. In this embodiment, P3 > P2 > P1.

[0035] In this embodiment, an efficient operation mode is also set. In the efficient operation mode, it is more inclined to improve the energy efficiency ratio. The set first preset high-pressure pressure range is: [P4 - △p4, P4 + △p4]. The selection of the first preset high-pressure pressure range in the efficient operation mode gives priority to a high energy efficiency ratio. Therefore, P4 < P1, and the control process of the EC axial flow fan corresponding to it is the same as the control process of the EC axial flow fan in the silent mode.

[0036] Step S203: The control unit determines a noise reduction mode corresponding to the judgment result according to the judgment result of whether the first high-pressure pressure is within the first preset high-pressure pressure range, and controls the EC axial flow fan to operate according to the corresponding noise reduction mode, where the noise reduction mode corresponds to setting the air volume adjustment parameter of the EC axial flow fan.

[0037] In the embodiment of the present application, the first preset high-pressure pressure range is determined according to the supply air temperature and ambient temperature of the heat pump air conditioner unit under different test conditions. At the same time, it is also by measuring the pressure when the EC axial flow fan operates stably and the high-pressure pressure on the exhaust side of the compressor when the air volume of the EC axial flow fan changes under different working condition test conditions, so that the compressor can build a pressure difference between the exhaust side and the suction side, thereby ensuring that the low-pressure pressure is within the set safety value, and at the same time, ensuring that the EC axial flow fan operates at a low air volume to reduce the operating noise.

[0038] In this embodiment, after determining the corresponding judgment result, the air volume (rotation speed) of the EC axial flow fan will be correspondingly controlled, that is, controlling the EC axial flow fan to operate according to the corresponding noise reduction mode at least includes controlling the air volume of the EC axial flow fan; in the embodiment of the present application, the judgment of the air volume adjustment of the EC axial flow fan is through the comparison of the first high-pressure pressure on the exhaust side with the first preset target high-pressure pressure. When the first high-pressure pressure on the exhaust side exceeds the first preset target high-pressure pressure range, the rotation speed of the EC axial flow fan is adjusted. Specifically, when the first high-pressure pressure is greater than the upper limit of the first preset target high-pressure pressure range, the rotation speed of the EC axial flow fan is increased, and when the first high-pressure pressure is lower than the lower limit of the first preset target high-pressure pressure range, the rotation speed of the EC axial flow fan is decreased.

[0039] Through the above steps S201 to S203, by obtaining the operation status information of the rail vehicle and determining the corresponding target operation mode of the heat pump air conditioner unit according to the operation status information; after determining the corresponding target operation mode, obtaining the first high-pressure pressure on the exhaust side of the compressor and judging whether the first high-pressure pressure is within the first preset high-pressure pressure range corresponding to the target operation mode; the control unit determines the corresponding noise reduction mode according to the judgment result of whether the first high-pressure pressure is within the first preset high-pressure pressure range, and controls the EC axial flow fan to work in the corresponding noise reduction mode, solving the problem that the heat pump air conditioner unit is not effectively controlled in the related technology, resulting in excessive noise during the operation of the rail vehicle, realizing the on-demand setting of the operation mode, the related fan of the heat pump control unit operates at a low air volume, and reducing the operation noise of the rail vehicle.

[0040] In some of these embodiments, the operation status information includes operation section information, and determining the target operation mode according to the operation status information is achieved through the following steps:

[0041] Step 1, the control unit obtains a first preset parameter table, where the first preset parameter table includes the corresponding relationship information between the operation section information and the first operation mode when the rail vehicle runs to the corresponding section.

[0042] In this embodiment, the first preset parameter table is preset and set according to the operation conditions of different rail vehicles. For example: when it is set that rail vehicle A runs in the W section of line X, the heat pump air conditioner unit of the rail vehicle is limited to run in the first operation mode, such as: silent operation mode.

[0043] In this embodiment, the first operation mode includes at least a silent operation mode and an efficient operation mode.

[0044] Step 2, the control unit queries the corresponding first operation mode in the first preset parameter table according to the operation section information, and determines that the target operation mode includes the first operation mode.

[0045] In this embodiment, when the rail vehicle runs to the set operation section, the control unit obtains the operation section information and determines the target operation mode by querying the corresponding first operation mode in the first preset parameter table.

[0046] By obtaining the first preset parameter table in the above steps; querying the corresponding first operation mode in the first preset parameter table according to the operation section information, and determining that the target operation mode includes the first operation mode, it realizes the determination of the target operation mode according to the operation status information of the rail vehicle, realizes the on-demand mode selection setting, and through the selected operation mode, makes the EC axial flow fan of the heat pump air conditioner unit operate at a low air volume, reducing the operation noise.

[0047] In some of these embodiments, the operating state information includes operating position information, and determining the target operating mode based on the operating state information is achieved through the following steps:

[0048] Step 1: The control unit determines whether it has received the first signal indicating that the rail vehicle is approaching the station.

[0049] In this embodiment, before the control unit receives the first signal, the operating mode is often set to the silent operating mode.

[0050] Step 2: When the control unit determines that it has received the first signal, it obtains the operating position information and determines whether the rail vehicle has approached the station based on the operating position information.

[0051] In this embodiment, when the control unit receives the first signal (approach signal), it determines whether the rail vehicle has approached the station based on the operating position information, so as to determine the corresponding operating mode.

[0052] Step 3: When the control unit determines that the rail vehicle has approached the station, it determines that the target operating mode includes the approach mode.

[0053] By determining whether the first signal indicating that the rail vehicle is approaching the station is received in the above steps; when it is determined that the first signal is received, obtaining the operating position information and determining whether the rail vehicle has approached the station based on the operating position information; when it is determined that the rail vehicle has approached the station, determining that the target operating mode includes the approach mode, the judgment of the target operating mode is realized based on the approach signal and the operating position information. By determining the selected target operating mode, the EC axial flow fan of the heat pump air conditioner unit operates at a low air volume, reducing the operating noise.

[0054] In some of these embodiments, after determining that the target operating mode includes the approach mode, the following steps are further implemented:

[0055] Step 1: The control unit determines whether it has received the second signal indicating that the rail vehicle is leaving the station. When the second signal is received and it is determined that the rail vehicle has left the station based on the operating position information, it is determined that the heat pump air conditioner unit exits the operating approach mode.

[0056] In this embodiment, if it is detected that the rail vehicle has left the station, it returns to the silent operating mode.

[0057] Step 2: When the control unit has not received the second signal, it determines that the heat pump air conditioner unit maintains the operating approach mode.

[0058] In some of these embodiments, the air volume adjustment parameter includes the air volume adjustment method. The control unit determines the noise reduction mode corresponding to the judgment result based on the judgment result of whether the first high-pressure is within the first preset high-pressure range through the following steps:

[0059] Step 1: The control unit detects whether the first high pressure drops to the first preset high pressure range.

[0060] Step 2: Based on the result of checking whether the first high pressure drops to the first preset high pressure range, the control unit determines the air volume adjustment method corresponding to the noise reduction mode, and adjusts the speed of the EC axial flow fan according to the air volume adjustment method to adjust the first high pressure to the first preset high pressure range. The air volume adjustment methods include reducing the air volume and increasing the air volume.

[0061] In this embodiment, the first high pressure on the exhaust side is greater than the preset target high pressure, and the EC axial flow fan operates based on the current speed. When the EC axial flow fan operates at the current speed, it will cause the first high pressure on the exhaust side to decrease. Therefore, by detecting whether the first high pressure on the exhaust side is within the preset high pressure range, the speed of the EC axial flow fan is controlled to ensure that there is a pressure difference between the exhaust side and the suction side of the compressor, while maintaining the EC axial flow fan running at the lowest speed to provide the minimum air volume, thereby reducing the operating noise.

[0062] In this embodiment, during the operation of the EC axial flow fan, although the first high pressure on the exhaust side will decrease, within a certain period of time, the first high pressure on the exhaust side will not drop to the first preset high pressure range. Therefore, it is necessary to increase the speed of the EC axial flow fan to quickly reduce the first high pressure on the exhaust side to the first preset high pressure range. After the first high pressure on the exhaust side drops to the first preset high pressure range, due to the operation of the EC axial flow fan, the first high pressure on the exhaust side will drop to or be lower than the lower limit of the first preset high pressure range. At this time, it is necessary to control the speed of the EC axial flow fan to decrease so that the pressure drop value of the first high pressure on the exhaust side generated by the operation of the EC axial flow fan is not greater than the pressure increase value of the high pressure on the exhaust side generated by the operation of the compressor. In this way, while ensuring that there is a pressure difference between the exhaust side and the suction side of the compressor, the EC axial flow fan is maintained at the lowest speed to provide the minimum air volume and reduce the operating noise.

[0063] In this embodiment, since it involves controlling the air volume (speed) of the EC axial flow fan and correspondingly adjusting the first high pressure on the exhaust side, in this embodiment, the air volume adjustment method is correspondingly set with a preset speed increase value and a preset speed drop value.

[0064] By detecting whether the first high pressure drops to the first preset high pressure range in the above steps; according to the result of checking whether the first high pressure drops to the first preset high pressure range, determining the air volume adjustment method corresponding to the noise reduction mode, and adjusting the speed of the EC axial flow fan according to the air volume adjustment method to adjust the first high pressure to the first preset high pressure range, it realizes adjusting the speed of the EC axial flow fan according to the comparison result between the first high pressure on the exhaust side and the target high pressure. While ensuring that there is a pressure difference between the exhaust side and the suction side of the compressor, it also maintains the EC axial flow fan running at the lowest speed, providing the minimum air volume and reducing the running noise.

[0065] In some of these embodiments, the control unit determines the air volume adjustment method corresponding to the noise reduction mode according to the result of checking whether the first high pressure drops to the first preset high pressure range, and adjusts the speed of the EC axial flow fan according to the air volume adjustment method through the following steps:

[0066] Step 1: When the control unit detects that the first high pressure has not dropped to the first preset high pressure range, it determines that the air volume adjustment method includes increasing the air volume, increasing the speed of the EC axial flow fan by a preset speed increase value, and controlling the EC axial flow fan to run at the increased first speed until the first high pressure drops to the first preset high pressure range.

[0067] In this embodiment, when the first high pressure is higher than the upper limit of the first preset high pressure range, the speed of the EC axial flow fan is increased by a preset speed increase value, thereby increasing the air volume of the EC axial flow fan.

[0068] Step 2: When the control unit detects that the speed of the EC axial flow fan has been increased to the rated maximum speed and the first high pressure has not dropped to the first preset high pressure range, it controls the EC axial flow fan to run at the rated maximum speed.

[0069] In this embodiment, when the increased first speed has been increased to the maximum speed, but the control unit detects that the first high pressure still cannot be reduced to the first preset high pressure range, it controls the EC axial flow fan to run at the maximum speed. Step 3: When the control unit detects that the first high pressure is within the first preset high pressure range, it controls the EC axial flow fan to run at the current third speed.

[0070] Step 4: When the control unit detects that the first high pressure is less than the lower limit value of the first preset high pressure range, it determines that the air volume adjustment method includes reducing the air volume, reducing the speed of the EC axial flow fan by a preset speed drop value, and controlling the EC axial flow fan to run at the reduced second speed.

[0071] In this embodiment, when the first high pressure drops to the lower limit value of the first preset high pressure range, due to the operation of the EC axial flow fan, the first high pressure will drop to a pressure difference between the exhaust side and the suction side of the compressor lower than the safety value, and the heat pump air conditioner unit will have low pressure protection. At this time, it is necessary to control and reduce the rotational speed of the EC axial flow fan, so that the pressure value reduced by 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. In this way, the first high pressure is increased to be maintained within the first preset high pressure range, and the EC axial flow fan maintains low air volume operation with low operating noise.

[0072] In this embodiment, the third rotational speed is the rotational speed at which the current EC axial flow fan is operating, and this rotational speed can be one of the first rotational speed and the second rotational speed.

[0073] In some of these embodiments, adjusting the rotational speed of the EC axial flow fan according to the air volume adjustment method is achieved through the following method: The control unit performs PID control on the rotational speed of the EC axial flow fan according to the air volume adjustment method (noise reduction mode).

[0074] In this embodiment, by adopting PID control, precise control of the rotational speed of the EC axial flow fan is achieved and stepless speed regulation is performed.

[0075] In some of these embodiments, the following steps are also implemented: When the control unit detects that the first high pressure is greater than the preset high pressure protection threshold, the control unit controls the EC axial flow fan to run at full speed and reduces the first high pressure to the lower limit value of the second preset high pressure range.

[0076] In this embodiment, to maintain the reliable operation of the heat pump air conditioner 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 run at full speed until the first high pressure is reduced to the corresponding second preset high pressure range; In this embodiment, the upper limit of the second preset high pressure range is the same in the silent operation mode and the station entry mode, both being the set preset high pressure protection threshold, but the lower limit of the second preset high pressure range is different in the silent operation mode and the station entry mode. In the silent operation mode, the lower limit of the second preset high pressure range is lower than the lower limit of the first preset high pressure range corresponding to the silent operation mode. In the station entry mode, the lower limit of the second preset high pressure range corresponds to the lower limit of the first preset high pressure range corresponding to the station entry mode.

[0077] In some of these embodiments, after the EC axial flow fan runs at full speed, the following steps are also implemented: The control unit detects the running time after the EC axial flow fan runs at full speed, and when it detects that the running time is greater than the first preset time, the control unit controls the heat pump air conditioner unit to exit the current target operation mode and run in one of the corresponding target operation modes.

[0078] In this embodiment, by setting the time to exit the mode, when the EC axial flow fan runs at full speed for a preset time threshold, the heat pump air conditioner unit is controlled to exit the current target operation mode and return to the corresponding target operation mode. In this embodiment, the mode to which it returns is the silent operation mode.

[0079] Figure 3 It is a flowchart of the silent operation mode according to the preferred embodiment of the present application. As Figure 3 shown, this process includes:

[0080] Step S301, determine whether an inbound signal is received. If yes, execute step S302; otherwise, execute step S303.

[0081] Step S302, run the inbound mode, and then execute step S309.

[0082] Step S303, perform speed regulation according to the set third preset target high-pressure value P 1-3 , and then execute step S304.

[0083] Step S304, determine whether the first high-pressure value is greater than the first preset high-pressure holding target value P 3-3 . If yes, execute step S305; otherwise, execute step S303.

[0084] Step S305, control the EC axial flow fan to run at full speed, and then execute step S306.

[0085] Step S306, determine whether the first high-pressure value is less than the second preset high-pressure holding lower limit value P 3-3 -A. If yes, execute step S303; otherwise, execute step S307.

[0086] Step S307, determine whether the running time t of the EC axial flow fan at full speed is greater than the second preset time t 1-3 . If yes, execute step S308; otherwise, execute step S306.

[0087] Step S308, determine whether the first high-pressure value is less than the preset third preset target high-pressure value P 1-3 . If yes, execute step S303; otherwise, execute step S305.

[0088] Step S309, determine whether an outbound signal is received. If yes, return to the silent operation mode; otherwise, execute step S302.

[0089] Figure 4 It is a flowchart of the inbound mode according to the preferred embodiment of the present application. As Figure 4 shown, this process includes:

[0090] Step S401: Adjust the rotational speed according to the set fourth preset target high-pressure value P 1-4 and then execute Step S402.

[0091] Step S402: Determine whether the first high-pressure value is greater than the third preset high-pressure holding target value P 3-4 . If it is, execute Step S403; otherwise, execute Step S401.

[0092] Step S403: Control the EC axial-flow fan to run at full speed, and then execute Step S404.

[0093] Step S404: Determine whether the first high-pressure value is less than the fourth preset target high-pressure value P 1-4 . If it is, execute Step S401; otherwise, execute Step S403.

[0094] In this embodiment, an electronic device is further provided, which includes a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0095] Optionally, the above electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the above processor, and the input / output device is connected to the above processor.

[0096] Optionally, in this embodiment, the above processor may be configured to execute the following steps through a computer program:

[0097] S1: Obtain the operation status information of the rail vehicle, and determine the target operation mode corresponding to the heat pump air-conditioning unit according to the operation status information.

[0098] S2: After determining the corresponding target operation mode, obtain the first high-pressure value on the exhaust side of the compressor, and determine whether the first high-pressure value is within the first preset high-pressure range corresponding to the target operation mode.

[0099] S3: According to the judgment result of whether the first high-pressure value is within the first preset high-pressure range, determine the noise reduction mode corresponding to the judgment result, and control the EC axial-flow fan to work according to the corresponding noise reduction mode.

[0100] It should be noted that the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and will not be repeated in this embodiment.

[0101] In addition, in combination with the control method of the heat pump air conditioner unit provided in the above embodiments, a storage medium can also be provided in this embodiment to implement it. A computer program is stored on the storage medium; when the computer program is executed by a processor, any one of the control methods of the heat pump air conditioner unit in the above embodiments is implemented.

[0102] It should be understood that the specific embodiments described here are only used to explain this application, rather than to limit it. According to the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0103] Obviously, the drawings are only some examples or embodiments of the present application. For those of ordinary skill in the art, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it can be understood that although the work done during the development process here may be complex and time-consuming, for those of ordinary skill in the art, certain design, manufacturing, or production changes based on the technical content disclosed in the present application are only conventional technical means and should not be regarded as insufficient disclosure of the present application.

[0104] The term "embodiment" in this application means that the specific features, structures, or characteristics described in combination with the embodiments may be included in at least one embodiment of the present application. The phrase appears in various positions in the specification and does not necessarily mean the same embodiment, nor does it mean being independent or alternative to other embodiments and mutually exclusive. Those of ordinary skill in the art can clearly or implicitly understand that the embodiments described in this application can be combined with other embodiments without conflict.

[0105] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of patent protection. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A control method for a heat pump air-conditioning unit, the heat pump air-conditioning unit being applied to a rail vehicle, the heat pump air-conditioning unit comprising a control unit, a compressor and an EC axial flow fan which are respectively connected to the control unit in a controlled manner, the EC axial flow fan being arranged on the condenser of the heat pump air-conditioning unit, characterized in that, The control method includes: The control unit obtains the operation state information of the rail vehicle, and determines the target operation mode corresponding to the heat pump air conditioner unit according to the operation state information, wherein the target operation mode sets the initial air volume when the EC axial flow fan operates; After determining the corresponding target operation mode, the control unit obtains the first high-pressure at the exhaust side of the compressor, and determines whether the first high-pressure is within a first preset high-pressure range corresponding to the target operation mode; The control unit determines the noise reduction mode corresponding to the judgment result according to the judgment result of whether the first high-pressure is within the first preset high-pressure range, and controls the EC axial flow fan to operate according to the corresponding noise reduction mode, wherein the noise reduction mode correspondingly sets the air volume adjustment parameter of the EC axial flow fan; the air volume adjustment parameter includes the air volume adjustment method; The control unit determines the noise reduction mode corresponding to the judgment result according to the judgment result of whether the first high-pressure is within the first preset high-pressure range, including: The control unit detects whether the first high-pressure drops to the first preset high-pressure range; When the control unit detects that the first high-pressure does not drop to the first preset high-pressure range, it determines that the air volume adjustment method includes increasing the air volume, increases the speed of the EC axial flow fan by a preset speed increase value, and controls the EC axial flow fan to operate at the increased first speed; When the control unit detects that the speed of the EC axial flow fan has increased to the rated maximum speed and the first high-pressure does not drop to the first preset high-pressure range, it controls the EC axial flow fan to operate at the rated maximum speed; When the control unit detects that the first high-pressure is within the first preset high-pressure range, it controls the EC axial flow fan to operate at the current third speed; When the control unit detects that the first high-pressure is less than the lower limit of the first preset high-pressure range, it determines that the air volume adjustment method includes reducing the air volume, reduces the speed of the EC axial flow fan by a preset speed drop value, and controls the EC axial flow fan to operate at the reduced second speed.

2. The control method of the heat pump air conditioner unit according to claim 1, wherein, The operation state information includes operation section information. Determining the target operation mode according to the operation state information includes: The control unit obtains a first preset parameter table, wherein the first preset parameter table includes the corresponding relationship information between the operation section information and the first operation mode when the rail vehicle runs to the corresponding section; The control unit queries the corresponding first operation mode in the first preset parameter table according to the operation section information, and determines that the target operation mode includes the first operation mode.

3. The control method of the heat pump air conditioner unit according to claim 1, characterized in that, The operation state information includes operation position information. Determining the target operation mode according to the operation state information includes: The control unit determines whether it receives the first signal that the rail vehicle enters the station; When the control unit determines that the first signal has been received, it acquires the running position information and determines whether the rail vehicle is approaching the station based on the running position information. When the control unit determines that the rail vehicle is approaching the station, it determines that the target operation mode includes the approach mode.

4. The control method of the heat pump air conditioner unit according to claim 3, characterized in that After determining that the target operation mode includes the approach mode, the control method further includes: The control unit determines whether the second signal indicating the rail vehicle leaving the station has been received. When the second signal is received and it is determined that the rail vehicle has left the station based on the running position information, the control unit determines that the heat pump air conditioner unit exits the approach mode of operation. When the control unit does not receive the second signal, it determines that the heat pump air conditioner unit maintains the approach mode of operation.

5. The control method of the heat pump air conditioner unit according to claim 1, characterized in that, Adjusting the speed of the EC axial flow fan according to the air volume adjustment method includes: the control unit performs PID control on the speed of the EC axial flow fan according to the speed adjustment parameter of the air volume adjustment method.

6. The control method of the heat pump air conditioner unit according to claim 1, wherein, The control method further includes: when the control unit detects that the first high pressure is greater than the preset high pressure protection threshold, the control unit controls the EC axial flow fan to run at full speed to reduce the first high pressure to the second preset high pressure range.

7. The control method of the heat pump air conditioner unit according to claim 6, characterized in that, After the EC axial flow fan runs at full speed, the control method further includes: the control unit detects the running time after the EC axial flow fan runs at full speed, and when it detects that the running time is greater than the first preset time, controls the heat pump air conditioner unit to exit the target operation mode of the current operation and run one of the corresponding target operation modes.

8. An electronic device, comprising a memory and a processor, characterized in that, A computer program is stored in the memory, and the processor is configured to run the computer program to execute the control method of the heat pump air conditioner unit according to any one of claims 1 to 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the steps of the control method of the heat pump air conditioner unit according to any one of claims 1 to 7 are implemented.

Images