CN117889575A - Control method, device, system and storage medium for air suspension unit system - Google Patents

Abstract

The application relates to a gas suspension refrigerating system, discloses a control method for a gas suspension unit system, wherein the gas suspension unit system comprises a gas supply system for supplying gas to a compressor, the gas supply system comprises two gas supply devices connected in parallel, and gas supply ends of the two gas supply devices are connected with a gas supply pipeline, and the method comprises the following steps: determining a first target air supply device and a backup air supply device; controlling the first target air supply device to perform an air supply operation, and controlling the backup air supply device to perform an air supply preparation operation; acquiring operation stage information of the air suspension unit; acquiring the air supply state of the first target air supply device under the condition that the operation stage information indicates that the operation stage is in a stable operation stage; and switching the backup air supply device to execute the air supply operation according to the air supply state. The method can improve the stability of the air supply operation of the air supply system and ensure that the air suspension unit system stably operates. The application also discloses a control device, a control system and a storage medium for the air suspension unit system.

Description

Control method, device, system and storage medium for air suspension unit system

Technical Field

The present application relates to air suspension refrigeration systems, and for example, to a control method, apparatus, system, and storage medium for an air suspension unit system.

Background

At present, the centrifugal water chilling unit has wide application in the building field and the industrial field. The bearings of the compressor configured by the centrifugal chiller comprise electromagnetic bearings, air suspension bearings and oil lubrication bearings. Wherein, the air suspension bearing and the electromagnetic bearing both belong to oil-free bearings. Compared with a compressor provided with an electromagnetic bearing, the compressor provided with the air suspension bearing has the technical advantages of stronger shock resistance and no need of additionally arranging a bearing protection system.

For the compressor equipped with the air suspension bearing, the centrifugal chiller is equipped with an air supply system. The air supply system comprises a refrigerant pump, an electric heater and an air supply tank. The refrigerant pump can draw refrigerant from the condenser into the air supply tank. The electric heater is used for heating the refrigerant in the gas supply tank to form a gaseous refrigerant so as to supply the gaseous refrigerant to the compressor.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

in the operation process of the electric heater, the stability of the pressure in the air supply tank has a certain influence on the stability of air supply. In general, when the internal pressure of the air supply tank is stabilized within the range of 750kPa to 850kPa, stable air supply of the air supply system can be realized. The refrigerant pumped by the refrigerant pump comes from the condenser, and the pressure of the refrigerant pumped by the refrigerant pump changes greatly in the operation stage of the centrifugal chiller, and the pumped refrigerant influences the internal pressure of the air supply tank, so that the internal pressure of the air supply tank also fluctuates greatly, which is unfavorable for the air supply operation of an air supply system, thereby adversely affecting the system stability of the centrifugal chiller.

It should be noted that the information disclosed in the foregoing background section is only for enhancing understanding of the background of the present application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a control method, a device, a system and a storage medium for an air suspension unit system, so as to improve the stability of air supply operation of an air supply system and enable the air suspension unit system to stably operate.

In some embodiments, the air levitation train system includes an air supply system for supplying air to the compressor, the air supply system including two air supply devices connected in parallel, air supply ends of the two air supply devices each being connected to an air supply line, the method comprising: determining a first target air supply device and a backup air supply device; controlling the first target air supply device to execute an air supply operation, and controlling the backup air supply device to execute an air supply preparation operation; acquiring operation phase information of the air suspension unit; acquiring a gas supply state of the first target gas supply device in a case where the operation stage information indicates that the operation stage is in a stable operation stage; and switching the backup air supply device to execute air supply operation according to the air supply state.

In some embodiments, the apparatus comprises a processor and a memory storing program instructions, the processor being configured to perform the control method for an air levitation train system as described previously when the program instructions are executed.

In some embodiments, the air levitation train system comprises: the unit body is provided with a compressor and a gas supply system, the gas supply system is used for supplying gas to the compressor and comprises two gas supply devices and gas supply pipelines which are connected in parallel, and gas supply ends of the two gas supply devices are connected with the gas supply pipelines; and a control device for an air levitation train system as described above is mounted to the train body.

In some embodiments, the storage medium stores program instructions that, when executed, perform a control method for an air levitation train system as previously described.

The control method, device, system and storage medium for the air suspension unit system provided by the embodiment of the disclosure can realize the following technical effects:

in the case of controlling the first target air supply device to perform the air supply operation, the embodiment of the present disclosure also controls the backup air supply device to perform the air supply preparation operation. When the backup air supply device is switched to execute air supply operation, the refrigerant is not required to be pumped to the condenser to the backup air supply device in real time through the driving pump, so that the great change of the internal pressure of the air supply tank of the air supply device caused by liquid pumping is avoided, the air supply system realizes stable air supply to the compressor, the air supply operation stability of the air supply system is improved, and the stable operation of the air suspension unit system is realized.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

FIG. 1 is a schematic diagram of the architecture of an air levitation train system;

FIG. 2 shows a schematic piping diagram of an air suspension train system;

FIG. 3 is a schematic view of the primary and secondary liquid extraction lines of the air suspension unit system;

FIG. 4 is a schematic diagram of a control method for an air levitation train system provided by an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of another control method for an air levitation train system provided by an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of another control method for an air levitation train system provided by an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of another control method for an air levitation train system provided by an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of a control device for an air levitation train system provided in an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of another control device for an air levitation train system provided by an embodiment of the present disclosure;

fig. 10 is a schematic diagram of an air levitation train system provided by an embodiment of the present disclosure.

Reference numerals:

1: an air supply line;

21: a main liquid taking pipeline; 211: a first electronic expansion valve;

22: an auxiliary liquid taking pipeline; 221: a fifth electromagnetic valve;

3: a bypass line;

10: a compressor; 10a: a fourth electronic expansion valve;

20: an evaporator;

30: a condenser;

401: first air supply tank, 401a: a first heater; 4011: a first level gauge; 4012: a first electromagnetic valve; 4013: a third electromagnetic valve; 4014: a second electronic expansion valve;

402: second air supply tank, 402a: a second heater; 4021: a second level gauge; 4022: a second electromagnetic valve; 4023: a fourth electromagnetic valve; 4024: a third electronic expansion valve;

50: driving a pump; 50a: a liquid taking input end; 501: a one-way valve.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.

As shown in connection with fig. 1 and 2, embodiments of the present disclosure provide an air suspension train system including a compressor 10, an evaporator 20, a condenser 30, and an air supply system for supplying air to the compressor 10. The compressor 10, the evaporator 20, and the condenser 30 constitute a refrigerant circulation path. The air supply system comprises two air supply devices connected in parallel. A fourth electronic expansion valve 10a is disposed in a connection path between the evaporator 20 and the condenser 10.

As shown in fig. 1, the two air supply devices are a first air supply device and a second air supply device, respectively. The first air supply means includes a first air supply tank 401. The second gas supply means includes a second gas supply tank 402. The first air supply tank 401 and the second air supply tank 402 are used to pump the liquid refrigerant/gas-liquid mixed refrigerant in the condenser 30 by driving the pump 50. The refrigerants stored in the first gas supply tank 401 and the second gas supply tank 402 may be mixed gas-liquid refrigerants or gaseous refrigerants. The first gas supply tank 401 is provided with a first heater 401a and a first level gauge 4011. The second air supply tank 402 is provided with a second heater 402a and a second liquid level meter 4021. The first heater 401a and the second heater 402a are used for heating the refrigerants of the first air supply tank 401 and the second air supply tank 402 to form a gaseous refrigerant to be supplied to the compressor 10 to supply air to the air suspension bearing of the compressor 10. The first liquid level gauge 4011 and the second liquid level gauge 4021 are respectively used for detecting liquid level values of the first gas supply tank 401 and the second gas supply tank 402.

Alternatively, the air supply ends of both air supply devices are connected with the air supply pipeline 1. The gas supply end of the first gas supply tank 401 is connected to the compressor 10 through a third electromagnetic valve 4013. The air supply end of the second air supply tank 402 is connected to the compressor 10 through a fourth electromagnetic valve 4023. The branch formed by the connection of the first air supply tank 401 and the compressor 10 and the branch formed by the connection of the second air supply tank 402 and the compressor 10 form the air supply pipeline 1.

Alternatively, the liquid-taking end of the first air supply tank 401 is connected to the drive pump 50 through a first electromagnetic valve 4012, and the liquid-taking end of the second air supply tank 402 is connected to the drive pump 50 through a second electromagnetic valve 4022. The drive pump 50 has one end connected to the first solenoid valve 4012 and the second solenoid valve 4022, and the other end connected to the condenser 30 through the first electronic expansion valve 211. The main liquid-taking pipeline 21 is formed by a branch formed by connecting the condenser 30, the driving pump 50, the first electromagnetic valve 4012 and the liquid-taking end of the first gas supply tank 401, and a branch formed by connecting the condenser 30, the driving pump 50, the second electromagnetic valve 4022 and the liquid-taking end of the second gas supply tank 402.

Optionally, the liquid-taking end of the second air supply tank 402 is also connected to the liquid-taking input end 50a of the drive pump 50 through a fifth electromagnetic valve 221. The auxiliary liquid-taking pipeline 22 is formed by a branch formed by connecting the liquid-taking end of the second air supply tank 402, the driving pump 50 and the first electromagnetic valve 4012.

Alternatively, a bypass line 3 is constituted by a branch line formed by connecting the first air supply tank 401 with the evaporator 20 and a branch line formed by connecting the second air supply tank 402 with the evaporator 20. Wherein a branch formed by connecting the first gas supply tank 401 and the evaporator 20 is provided with a second electronic expansion valve 4014. The branch formed by connecting the second air supply tank 402 with the evaporator 20 is provided with a third electronic expansion valve 4024.

Based on the air suspension unit system, referring to fig. 4, an embodiment of the disclosure provides a control method for an air suspension unit system, including:

s01, the processor determines a first target air supply device and a backup air supply device.

S02, the processor controls the first target air supply device to perform the air supply operation, and controls the backup air supply device to perform the air supply preparation operation.

S03, the processor acquires operation stage information of the air suspension unit.

S04, the processor acquires the air supply state of the first target air supply device under the condition that the operation stage information indicates that the operation stage is in a stable operation stage.

S05, the processor switches the backup air supply device to execute air supply operation according to the air supply state.

By adopting the control method for the air suspension unit system provided by the embodiment of the disclosure, the embodiment of the disclosure also controls the backup air supply device to execute the air supply preparation operation under the condition of controlling the first target air supply device to execute the air supply operation. When the backup air supply device is switched to execute air supply operation, the refrigerant is not required to be pumped to the condenser to the backup air supply device in real time through the driving pump, so that the great change of the internal pressure of the air supply tank of the air supply device caused by liquid pumping is avoided, the air supply system realizes stable air supply to the compressor, the air supply operation stability of the air supply system is improved, and the stable operation of the air suspension unit system is realized.

Optionally, fig. 3 shows a schematic view of the liquid extraction directions of the main liquid extraction pipeline and the auxiliary liquid extraction pipeline of the air suspension unit system. Wherein X is ₁ Indicating the first liquid-taking direction, X, of the main liquid-taking pipeline 21 of the first air supply device ₂ The first liquid taking direction of the main liquid taking pipe 21 of the second air supply device is shown. First liquid taking direction (X ₁ 、X ₂ ) The flow direction of the refrigerant from the condenser 30 to the backup air supply device is shown.

As shown in fig. 1, 3 and 5, the liquid-taking end of the backup air supply device is communicated with the condenser 30 through a main liquid-taking pipe, which includes a liquid-taking pipe extending along a first liquid-taking direction (X ₁ 、X ₂ ) The first liquid-taking solenoid valves (4012, 4022) and the drive pump 50 are connected in series in this order, and the backup air supply device is provided with an auxiliary air supply tank and an auxiliary heater.

The processor controls the backup air supply device to perform an air supply preparation operation, comprising:

s11, the processor acquires the current tank pressure value of the auxiliary gas tank.

And S12, under the condition that the current tank pressure value does not meet the air supply pressure condition, the processor controls the first liquid taking electromagnetic valve and the driving pump to be opened so as to extract the refrigerant from the condenser into the auxiliary air supply tank along the first liquid taking direction.

Optionally, the tank pressure value satisfies the air supply pressure condition, including: the tank pressure value is greater than or equal to the upper pressure threshold. The tank pressure value does not satisfy the air supply pressure condition, including: the tank pressure value is less than the upper pressure threshold. Wherein the upper pressure threshold value represents the maximum value of the air supply pressure of the air supply tank arranged by the air supply device in the air supply stage.

And S13, the processor controls the auxiliary heater to heat the refrigerant in the auxiliary air supply tank until the current tank pressure value meets the air supply pressure condition.

It should be noted that, when the second air supply device is the backup air supply device and the current tank pressure value of the auxiliary air supply tank of the backup air supply device does not meet the air supply pressure condition, the processor controls the first liquid taking solenoid valve 4022 and the driving pump 50 to be opened so as to take liquid along the first liquid taking direction X ₂ Refrigerant is drawn from the condenser 30 into the auxiliary air supply tank.

In the case that the first air supply device is a backup air supply device and the current tank pressure value of the auxiliary air supply tank of the backup air supply device does not meet the air supply pressure condition, the processor controls the first liquid taking solenoid valve 4012 and drives the pump 50 to open so as to take liquid in the first liquid taking direction X ₁ Refrigerant is drawn from the condenser 30 into the auxiliary air supply tank.

In this way, in the embodiment of the disclosure, when the current tank pressure value does not meet the air supply pressure condition, the pump and the first liquid taking electromagnetic valve are driven to open to execute liquid pumping operation from the condenser, and the auxiliary heater is controlled to heat the refrigerant in the auxiliary air supply tank until the current tank pressure value meets the air supply pressure condition. Thus, the backup air supply device is made to wait for air supply after performing sufficient air supply preparation to realize stable air supply to the compressor at the time of the subsequent air supply operation.

As an example, in the case where it is determined that the first air supply device is the first target air supply device and the second air supply device is the backup air supply device, the second solenoid valve 4022 is the first liquid taking solenoid valve. When the current pressure value of the second air supply tank 402 does not satisfy the air supply pressure condition, the processor controls the second solenoid valve 4022 and the driving pump 50 to be turned on so as to draw the refrigerant from the condenser 30 into the second air supply tank 402 along the first liquid taking direction, and controls the second heater 402a to heat the refrigerant contained in the air supply tank. At the same time, the processor continues to monitor the tank pressure value of the second supply tank 402 until the new tank pressure value meets the supply pressure condition.

As another example, in the case where it is determined that the first air supply device is the first target air supply device and the second air supply device is the backup air supply device, the first solenoid valve 4012 is the first liquid taking solenoid valve. When the current pressure value of the first air supply tank 401 does not satisfy the air supply pressure condition, the processor controls the first solenoid valve 4012 and the driving pump 50 to open so as to draw the refrigerant from the condenser 30 into the first air supply tank 401 along the first liquid taking direction, and controls the first heater 401a to heat the refrigerant contained in the air supply tank. Meanwhile, the processor continuously monitors the tank pressure value of the first gas supply tank 401 until the new tank pressure value satisfies the gas supply pressure condition.

It can be seen that the two parallel connected air supplies are backup air supplies to each other. The backup air supply device performs an air supply preparation operation while the first target air supply device supplies air to the compressor, so that the driving pump suction operation is performed before the backup air supply device performs the air supply operation. Therefore, the pressure of the air supply tank of the backup air supply device tends to be stable before the air supply operation is performed, so that the large change of the internal pressure of the air supply tank of the air supply device caused by liquid suction is avoided, and the air supply system realizes stable air supply to the compressor.

Optionally, the processor switches the backup air supply device to perform air supply operation according to the air supply state, including:

and the processor switches the backup air supply device to execute the air supply operation under the condition that the liquid level value of the first target air supply device does not meet the preset liquid level condition.

In this way, in case the liquid level value of the first target gas supply device does not meet the preset liquid level condition, the current liquid level characterizing the first target gas supply device is insufficient to support the gas supply operation. If the first target air supply device is still selected for supplying air, the air supply is insufficient, and the continuity of the air supply cannot be ensured. For this reason, the embodiment of the present disclosure switches to the backup air supply device to perform the air supply operation.

It is understood that the processor controls the first target air supply device to stop the air supply operation while switching the backup air supply device to perform the air supply operation, or controls the first target air supply device to stop the air supply operation after switching the backup air supply device to perform the air supply operation.

Optionally, the liquid level value satisfies a preset liquid level condition, including: the liquid level value is less than or equal to the first liquid level lower threshold. The liquid level value satisfies a preset liquid level condition, comprising: the liquid level value is greater than the first liquid level lower threshold and less than or equal to the liquid level upper threshold. The upper liquid level threshold and the lower first liquid level threshold may be determined based on the volume of the gas supply tank. As an example, the first lower and upper liquid level thresholds are 50 and 150 millimeters, respectively. As another example, the first lower and upper liquid level thresholds are 60 and 170 millimeters, respectively.

It is understood that the processor continues to perform the air supply operation by the first target air supply device in a case where the liquid level value of the first target air supply device satisfies a preset liquid level condition.

Optionally, the processor determines a first target air supply and a backup air supply, including:

The processor selects an air supply device meeting the air supply pressure difference condition as a first target air supply device, and selects an air supply device not meeting the air supply pressure difference condition as a backup air supply device.

Wherein, the air supply pressure difference condition includes: the supply air pressure difference is greater than or equal to the start pressure difference.

The supply air pressure difference represents the difference between the supply air tank pressure value and the bearing discharge pressure value of the compressor. The starting differential pressure represents the differential pressure threshold to achieve suspension of the aero-suspension bearing of the compressor configuration. The specific value of the starting pressure difference may be determined according to the model of the compressor.

Thus, when the pressure value of the air supply tank of the air supply device meets the air supply pressure difference condition, the air supply device is characterized as having completed the air supply pressure difference establishing operation. The air suspension unit system can ensure the start of the compressor and the normal operation of the compressor through the air supply device. Therefore, the embodiment of the present disclosure selects the air supply device satisfying the air supply pressure difference condition as the first target air supply device to achieve normal start or continuous operation of the compressor. Meanwhile, the embodiment of the disclosure selects the air supply device which does not meet the air supply pressure difference condition as the backup air supply device, so that the backup air supply device can timely execute liquid taking operation and boosting operation in the air supply operation stage of the first target air supply device, and air supply preparation is performed for switching of the subsequent air supply devices. Thereby, the stability and the continuity of the air supply system are ensured.

It will be appreciated that the processor randomly selects one air supply device as the first target air supply device and selects the other air supply device as the backup air supply device in the event that both air supply devices satisfy the air supply pressure difference condition.

Optionally, the two air supply devices are communicated through an auxiliary liquid taking pipeline. In fig. 3, Y represents the second liquid taking direction of the auxiliary liquid taking line 22. The auxiliary liquid taking line 22 includes a second liquid taking solenoid valve and a driving pump 50 connected in series in sequence along a second liquid taking direction. The second liquid taking direction Y represents the flow direction of the refrigerant from the liquid storage device to the second target air supply device.

As shown in connection with fig. 2, 3 and 6, an embodiment of the present disclosure further provides a control method for an air levitation train system, including:

s21, the processor determines a first target air supply device and a backup air supply device.

S22, the processor controls the first target air supply device to perform the air supply operation, and controls the backup air supply device to perform the air supply preparation operation.

S23, the processor acquires operation stage information of the air suspension unit.

S24, the processor acquires the air supply state of the first target air supply device under the condition that the operation stage information indicates that the operation stage is in a stable operation stage.

S25, the processor switches the backup air supply device to execute air supply operation according to the air supply state.

S26, the processor determines a second target air supply device and a liquid storage device when the operation stage information indicates that the operation stage information is in a stop restarting stage and the liquid level value of the condenser is smaller than a second liquid level lower limit threshold value. Wherein, the shutdown restart stage represents a startup stage after a long shutdown.

And S27, the processor controls the driving pump and the second liquid taking electromagnetic valve to be opened so as to extract the refrigerant from the liquid storage device to the second target air supply device along the second liquid taking direction, so that the air supply system can execute the pressure difference building operation.

By adopting the control method for the air suspension unit system, which is provided by the embodiment of the disclosure, when the air suspension unit system is stopped and started for a long time, the liquid level of the condenser is low, so that the internal pressure of the condenser is low. The difficulty in drawing liquid from the condenser by driving the pump is high. Meanwhile, a connecting pipeline between the condenser and the driving pump is longer, and gas reserved in the pipeline can reduce the speed of the driving pump from the liquid pumping of the condenser to the gas supply device, so that a heater arranged on the gas supply device cannot be started, and the pressure in a gas supply tank arranged on the gas supply device is slowly increased. Thereby resulting in long downtime for startup. In order to shorten the duration of the shutdown restart stage, when the air suspension unit is determined to be in the shutdown restart stage and the liquid level value of the condenser is smaller than the second liquid level lower limit threshold, determining a second target air supply device and a liquid storage device from two air supply devices, and by extracting the refrigerant from the liquid storage device to the second target air supply device along the second liquid taking direction, the length of a pipeline for driving a pump to pump liquid can be shortened, the pump can be driven to pump liquid from the liquid storage device, the heater configured by the second target air supply device can be quickly started, the internal pressure of the air supply tank configured by the air supply device can be quickly increased, and accordingly the starting duration of the shutdown restart stage can be effectively shortened. Therefore, on the basis of improving the stability of the air supply operation of the air supply system, the embodiment of the disclosure can shorten the starting time of the shutdown and restarting stage of the air suspension unit and improve the running reliability of the air suspension unit system.

It should be noted that, after determining the second target air supply device and the liquid storage device, the processor further includes: and controlling the bypass pipeline to be continuously opened so as to realize bypass pressure relief.

In this way, the heater performs a heating operation when the pump is driven, and there is a case where the pressure inside the air supply tank of the air supply device arrangement is greatly increased or suddenly increased. In order to avoid the influence of the excessive pressure in the air supply tank on the pumping efficiency of the driving pump, the bypass pipeline is controlled to be continuously opened to realize bypass pressure relief, and the pumping efficiency of the follow-up driving pump is improved.

Optionally, the secondary liquid-taking line 22 further comprises a one-way valve 501. The check valve 501 is used to control the refrigerant flowing through the auxiliary liquid-taking pipeline 22 to flow in one direction. The drive pump 50 is connected in series with the one-way valve 501 in the second liquid taking direction.

The processor determines a second target gas supply device and a liquid storage device, comprising:

the processor selects an air supply device connected with a liquid taking input end of the driving pump as a liquid storage device.

Another air supply device is selected as the second target air supply device.

Thus, the embodiment of the disclosure is provided with the one-way valve on the auxiliary liquid taking pipeline, so that the driving pump can only take liquid in one way along the second liquid taking direction. Therefore, the embodiment of the disclosure selects the air supply device connected with the liquid taking input end of the driving pump as the liquid storage device, so that the driving pump can perform liquid pumping operation from the liquid storage device.

As an example, in the case where the operation stage information indicates that the stop restart stage is in progress, the processor determines the second air supply device as the liquid storage device and determines the first air supply device as the second target air supply device because the liquid taking input 50a of the drive pump 50 is connected to the second air supply device. Correspondingly, the first solenoid valve 4012 is a second fluid-taking solenoid valve. The processor further controls the driving pump 50 to pump the refrigerant from the second air supply device to the first air supply device along the second liquid taking direction so as to enable the air supply system to execute the pressure difference building operation.

As shown in conjunction with fig. 7, an embodiment of the present disclosure further provides a control method for an air suspension unit system, including:

s31, the processor determines a first target air supply device and a backup air supply device.

S32, the processor controls the first target air supply device to perform the air supply operation, and controls the backup air supply device to perform the air supply preparation operation.

S33, the processor acquires operation stage information of the air suspension unit.

And S34, the processor acquires the air supply state and the fault state of the first target air supply device and the fault state of the backup air supply device under the condition that the operation stage information indicates that the operation stage is in a stable operation stage.

And S35, the processor switches the backup air supply device to execute air supply operation according to the air supply state.

And S36, the processor switches the backup air supply device to execute the air supply operation under the condition that the fault state indicates that the first target air supply device is faulty and the backup air supply device is in normal operation.

By adopting the control method for the air suspension unit system, which is provided by the embodiment of the disclosure, if the two air supply devices fail after long-term use, normal air supply cannot be realized. The embodiment of the disclosure continuously monitors the fault states of the two air supply devices, and switches the backup air supply device to execute the air supply operation when the first target air supply device is in fault and the backup air supply device is in normal operation. So that the air supply system can realize continuous air supply, and the operation reliability of the air suspension unit system is further improved.

Optionally, the first target gas supply device fault is determined in the following manner:

a prompt message indicating that the operation information of the first target gas supply device is abnormal is received. Wherein the operating information includes some or all of a pressure value, a liquid level value, and a heater parameter value. The heater parameter values include voltage values, current values, or power values.

In practical application, as shown in fig. 1 to 3, the control method for the air suspension unit system specifically executes the following control flow:

S41, the processor determines that the first air supply device satisfies the air supply pressure difference condition, determines the first air supply device as a first target air supply device, and determines the second air supply device as a backup air supply device. The second gas supply tank 402 is an auxiliary gas supply tank and the second heater 402a is an auxiliary heater.

S42, the processor controls the first air supply tank 401 to supply air to the compressor 10. Meanwhile, the processor acquires the current tank pressure value of the second air supply tank 402, and determines that the second air supply tank 402 does not satisfy the air supply pressure condition by judging that the current tank pressure value of the air supply tank is smaller than the upper pressure threshold.

S43, the processor controls the second electromagnetic valve 4022, the driving pump 50 and the check valve 501 to be opened so as to enable the second electromagnetic valve 4022 to take liquid along the first liquid taking direction X ₂ Drawing refrigerant from the condenser 30 into the second air supply tank 402 and controlling the second heater 402a to perform the second operationThe refrigerant contained in the gas supply tank 402 is heated until the current tank pressure value is greater than or equal to the upper pressure threshold. When the current tank pressure value is determined to be greater than or equal to the upper pressure threshold, the drive pump 50 and the check valve 501 are controlled to be closed.

S44, the processor acquires the operation stage information of the air suspension unit, and after confirming that the air suspension unit is in a stable operation stage, the processor closes the first electromagnetic valve 4012, the fourth electromagnetic valve 4023 and the second electronic expansion valve 4014, and simultaneously opens the third electromagnetic valve 4013. In addition, the processor closes the fifth solenoid valve 221.

The first heater 401a is turned on or off according to the air supply pressure difference value of the first air supply tank 401 to perform an air supply operation by the first air supply device, and acquires the air supply state of the first air supply device. And after confirming that the liquid level value of the first air supply device meets the preset liquid level condition, the processor continuously monitors the liquid level value of the first air supply device.

S45, after the air suspension unit operates for 3.4 hours, the processor determines that the liquid level value of the first air supply device is smaller than the first liquid level lower limit threshold value. The processor closes the third solenoid valve 4013, the second solenoid valve 4022, the third electronic expansion valve 4024, and opens the fourth solenoid valve 4023. That is, the first air supply device is controlled to stop the air supply operation, and the second air supply device is switched to perform the air supply operation. Specifically, the processor controls the second air supply tank 402 to supply air to the compressor 10. Meanwhile, the processor acquires the current tank pressure value of the first air supply tank 401, and determines that the first air supply tank 401 does not meet the air supply pressure condition by judging that the current tank pressure value of the air supply tank is smaller than the upper pressure threshold.

S46, the processor controls the first electromagnetic valve 4012 to be opened, and controls the driving pump 50 and the one-way valve 501 to be opened again so as to follow the first liquid taking direction X ₁ The refrigerant is extracted from the condenser 30 into the first air supply tank 401, and the first heater 401a is controlled to heat the refrigerant accommodated in the first air supply tank 401 until the current tank pressure value meets or exceeds the upper pressure threshold. When the current tank pressure value is determined to be greater than or equal to the upper pressure threshold, the drive pump 50 and the check valve 501 are controlled to be closed.

S47, the processor acquires the operation stage information of the air suspension unit again, and after confirmation, the air suspension unit is still in a stable operation stage, the processor acquires the air supply state of the second air supply device. And after confirming that the liquid level value of the second air supply device meets the preset liquid level condition, the processor continuously detects the liquid level value of the second air supply device.

And S48, after the processor runs for 2.7 hours in the air suspension unit, the processor determines that the liquid level value of the second air supply device is smaller than the first liquid level lower limit threshold value, and then the processor closes the first electromagnetic valve 4012, the fourth electromagnetic valve 4023 and the second electronic expansion valve 4014 and simultaneously opens the third electromagnetic valve 4013. That is, the second air supply device is controlled to stop the air supply operation, and the first air supply device is switched to perform the air supply operation. The subsequent execution step may refer to the aforementioned step S44.

In another practical application, the control method for the air suspension unit system specifically executes the following control flow:

s51, the processor acquires operation stage information of the air suspension unit and a condenser liquid level value. After confirming that the air suspension unit is in the stop restarting stage and the liquid level value is smaller than the second liquid level lower limit threshold value, the processor selects a second air supply device connected with the liquid taking input end 50a of the driving pump 50 as a liquid storage device, and the first air supply device is used as a second target air supply device.

S52, the processor closes the first electronic expansion valve 211, the second electromagnetic valve 4022, and the fourth electromagnetic valve 4023, opens the fifth electromagnetic valve 221, the first electromagnetic valve 4012, the third electromagnetic valve 4013, the second electronic expansion valve 4014, and the third electronic expansion valve 4024, and controls the driving pump 50 and the check valve 501 to open, so as to draw the refrigerant from the second air supply device into the first air supply device along the second liquid-taking direction Y, and make the air supply system perform the pressure difference building operation.

And S53, after the processor determines that the air supply system completes the air supply pressure difference establishment operation, the air suspension unit is started smoothly. The processor opens the first electronic expansion valve 211, the second electromagnetic valve 4022, closes the fifth electromagnetic valve 221, and continuously opens the third electronic expansion valve 4024. The driving pump 50 and the check valve 501 are controlled to be continuously opened so as to enable the liquid to be taken along the first liquid taking direction X ₂ From the condenser30 to draw the refrigerant into the second gas supply tank 402, and to control the second heater 402a to heat the refrigerant accommodated in the second gas supply tank 402. The second air supply device is put in an air supply preparation stage. The following gas suspension unit enters a stable operation stage, and specific logic can refer to the actual application example.

In another practical application, the control method for the air suspension unit system specifically executes the following control flow:

and S61, when the second air supply device is the first target air supply device, the processor receives the prompt information of abnormal power value of the heater of the second air supply device and determines that the second air supply device fails. Meanwhile, when the processor determines that the backup air supply device is operating normally, the fifth electromagnetic valve 221 and the second and third electronic expansion valve electromagnetic valves 4022 and 4024 are closed. To control the second air supply means to stop the air supply operation.

S62, the processor controls the first air supply device to perform an air supply operation.

As shown in fig. 8, an embodiment of the present disclosure provides a control apparatus 200 for an air suspension unit system, including a first obtaining module 21, an executing module 22, a second obtaining module 23, a judging module 24, and an executing module 25. The first acquisition module 21 is configured to determine a first target air supply device and a backup air supply device; the B module 22 is configured to control the first target air supply device to perform the air supply operation, and control the backup air supply device to perform the air supply preparation operation; the second acquisition module 23 is configured to acquire operation stage information of the air suspension unit; the judging module 24 is configured to acquire the air supply state of the first target air supply device in the case where the operation stage information indicates that the operation stage is in the steady operation stage; the execution module 25 is configured to switch the backup air supply device to execute the air supply operation according to the air supply state.

By adopting the control device for the air suspension unit system, which is provided by the embodiment of the disclosure, the great change of the internal pressure of the air supply tank of the air supply device caused by liquid extraction is effectively avoided, so that the air supply system can realize stable air supply to the compressor, the stability of the air supply operation of the air supply system is improved, and the stable operation of the air suspension unit system is realized.

As shown in connection with fig. 9, an embodiment of the present disclosure provides a control apparatus 300 for an air suspension train system, including a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via the bus 103. The communication interface 102 may be used for information transfer. Processor 100 may invoke logic instructions in memory 101 to perform the control methods for the air suspension train system of the above-described embodiments.

Further, the logic instructions in the memory 101 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product.

The memory 101 is a computer readable storage medium that can be used to store a software program, a computer executable program, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes the functional applications and data processing by running the program instructions/modules stored in the memory 101, i.e. implements the control method for the air suspension train system in the above-described embodiments.

The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the terminal device, etc. Further, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.

As shown in connection with fig. 10, an embodiment of the present disclosure provides an air levitation train system 600 comprising: the unit body and the control devices 200 and 300 for the air suspension unit system described above. The unit body is provided with a compressor and an air supply system. The air supply system is used for supplying air to the compressor. The air supply system comprises two air supply devices connected in parallel and an air supply pipeline. The air supply ends of the two air supply devices are connected with an air supply pipeline. Control devices 200 and 300 for the air levitation train system are installed to the train body. The mounting relationships described herein are not limited to placement within the unit, but include mounting connections to other components of the unit, including but not limited to physical, electrical, or signaling connections, etc. Those skilled in the art will appreciate that the control devices 200 and 300 for an air levitation train system may be adapted to a viable train body to implement other viable embodiments.

Embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described control method for a gas levitation train system.

The computer readable storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.

Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.

Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.

In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims (10)

1. A control method for a gas levitation unit system, the gas levitation unit system comprising a gas supply system for supplying gas to a compressor, the gas supply system comprising two gas supply devices connected in parallel and a gas supply line, gas supply ends of the two gas supply devices being connected to the gas supply line, the method comprising:

determining a first target air supply device and a backup air supply device;

controlling the first target air supply device to execute an air supply operation, and controlling the backup air supply device to execute an air supply preparation operation;

acquiring operation phase information of the air suspension unit;

acquiring a gas supply state of the first target gas supply device in a case where the operation stage information indicates that the operation stage is in a stable operation stage;

and switching the backup air supply device to execute air supply operation according to the air supply state.

2. The method according to claim 1, wherein the liquid-taking end of the backup air supply device is communicated with the condenser through a main liquid-taking pipe, the main liquid-taking pipe includes a first liquid-taking solenoid valve and a driving pump which are sequentially connected in series in a first liquid-taking direction, the backup air supply device is configured with an auxiliary air supply tank and an auxiliary heater, and the controlling the backup air supply device to perform an air supply preparation operation includes:

Acquiring a current tank pressure value of the auxiliary gas supply tank;

under the condition that the current tank pressure value does not meet the air supply pressure condition, controlling the first liquid taking electromagnetic valve and the driving pump to be opened so as to extract the refrigerant from the condenser into the auxiliary air supply tank along the first liquid taking direction;

controlling the auxiliary heater to heat the refrigerant in the auxiliary air supply tank until the current tank pressure value meets the air supply pressure condition;

the first liquid taking direction represents the flowing direction of the refrigerant from the condenser to the backup air supply device.

3. The method of claim 1, wherein switching the backup air supply device to perform an air supply operation according to the air supply state comprises:

and under the condition that the liquid level value of the first target air supply device does not meet the preset liquid level condition, switching the backup air supply device to execute air supply operation.

4. The method of claim 1, wherein the determining the first target gas supply and the backup gas supply comprises:

and selecting the air supply device meeting the air supply pressure difference condition as a first target air supply device, and selecting the air supply device not meeting the air supply pressure difference condition as a backup air supply device.

5. The method of any one of claims 1 to 4, wherein the two air supply devices are in communication via an auxiliary liquid extraction line comprising a second liquid extraction solenoid valve and a drive pump connected in series in sequence along a second liquid extraction direction, the method further comprising:

determining a second target air supply device and a liquid storage device under the condition that the operation stage information indicates that the operation stage information is in a stop restarting stage and the liquid level value of the condenser is smaller than a second liquid level lower limit threshold value;

controlling the driving pump and the second electromagnetic valve to be opened so as to extract the refrigerant from the liquid storage device to the second target air supply device along the second liquid taking direction, so that the air supply system can execute the pressure difference building operation;

the second liquid taking direction represents the flowing direction of the refrigerant from the liquid storage device to the second target air supply device.

6. The method of claim 5, wherein the auxiliary liquid extraction line further comprises a one-way valve for controlling one-way flow of a refrigerant circulating through the auxiliary liquid extraction line, the drive pump being connected in series with the one-way valve along the second liquid extraction direction, the determining the second target gas supply and the liquid storage device comprising:

Selecting an air supply device connected with a liquid taking input end of the driving pump as a liquid storage device;

another air supply device is selected as the second target air supply device.

7. The method according to any one of claims 1 to 4, further comprising, in the case where the operation phase information indicates that the operation phase is in a steady operation phase:

acquiring respective fault states of the first target air supply device and the backup air supply device;

and under the condition that the fault state indicates that the first target air supply device is faulty and the backup air supply device is in normal operation, switching the backup air supply device to execute air supply operation.

8. A control device for a gas levitation train system comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the control method for a gas levitation train system of any of claims 1 to 7 when the program instructions are executed.

9. An air suspension train system, comprising:

the unit body is provided with a compressor and a gas supply system, the gas supply system is used for supplying gas to the compressor and comprises two gas supply devices and gas supply pipelines which are connected in parallel, and gas supply ends of the two gas supply devices are connected with the gas supply pipelines; and

The control device for an air levitation train system of claim 8 mounted to the train body.

10. A storage medium storing program instructions which, when executed, perform the control method for an air levitation train system of any of claims 1 to 7.