CN113959127A - Control method, device, equipment and medium for air supply system of refrigeration equipment - Google Patents
Control method, device, equipment and medium for air supply system of refrigeration equipment Download PDFInfo
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- CN113959127A CN113959127A CN202111096431.9A CN202111096431A CN113959127A CN 113959127 A CN113959127 A CN 113959127A CN 202111096431 A CN202111096431 A CN 202111096431A CN 113959127 A CN113959127 A CN 113959127A
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- pressure difference
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 65
- 239000007788 liquid Substances 0.000 claims description 21
- 239000003507 refrigerant Substances 0.000 claims description 20
- 238000005485 electric heating Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000001816 cooling Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 14
- 239000000725 suspension Substances 0.000 description 13
- 230000001276 controlling effect Effects 0.000 description 12
- 230000008569 process Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The application relates to the technical field of water cooling equipment, and discloses a control method for an air supply system of refrigeration equipment, wherein the air supply system comprises an air supply tank, a bypass pipeline is arranged between the air supply tank and an evaporator, and the method comprises the steps of obtaining the starting state of a compressor; acquiring the air supply pressure difference of the air supply system according to the starting state of the compressor; and controlling the on-off state of the bypass pipeline according to the matching condition of the air supply pressure difference and the preset pressure difference. The method can avoid the pressure difference fault of the air supply system when the compressor is started, and improve the operation reliability of the water cooling equipment. The application also discloses a control device, equipment and a medium for the air supply system of the refrigeration equipment.
Description
Technical Field
The present application relates to the technical field of refrigeration equipment, and for example, to a control method, device, equipment and storage medium for an air supply system of refrigeration equipment.
Background
At present, water cooling equipment belongs to refrigeration equipment and is commonly used in building air conditioners. The water chiller is typically configured with an air suspension compressor or a gas-liquid mixture compressor. Taking an air suspension compressor as an example, the air suspension compressor is a compressor with an air suspension bearing, and belongs to power equipment which utilizes the pressure generated by air between the bearing and a rotor to support the rotor to run.
In the operation process of the water cooling equipment, the air supply pressure difference of an air supply system for supplying air to the compressor needs to be kept stable, so that the reliable operation of the air suspension unit can be ensured. However, in the starting stage of the compressor, the temperature of the cooling water is significantly higher than that of the chilled water, which may cause the suction pressure of the compressor to decrease rapidly, and the rapid change of the suction pressure may adversely affect the air supply pressure difference of the air supply system, or even cause the air supply system to malfunction.
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 existing water cooling equipment, when a compressor is started, a pressure difference fault occurs in an air supply system due to the rapid change of the suction pressure of the compressor, and the operation reliability of the water cooling equipment is influenced.
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 nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a control method, a control device, equipment and a medium for an air supply system of refrigeration equipment, so that a pressure difference fault of the air supply system is avoided when a compressor is started, and the operation reliability of water cooling equipment is improved.
In some embodiments, the air supply system comprises an air supply tank, a bypass line is arranged between the air supply tank and the evaporator, and the method comprises the steps of obtaining the starting state of the compressor; acquiring the air supply pressure difference of the air supply system according to the starting state of the compressor; and controlling the on-off state of the bypass pipeline according to the matching condition of the air supply pressure difference and the preset pressure difference.
In some embodiments, the apparatus includes a processor and a memory storing program instructions, the processor being configured to execute, when executing the program instructions, a control method for a refrigeration appliance air supply system as previously described.
In some embodiments, the refrigeration equipment comprises an air supply system, the air supply system is provided with an air supply tank, a bypass line is arranged between the air supply tank and the evaporator, and the refrigeration equipment further comprises a control device for the air supply system of the refrigeration equipment as described above.
In some embodiments, the storage medium stores program instructions that, when executed, perform a control method for a refrigeration appliance air supply system as previously described.
The control method, the control device, the control equipment and the storage medium for the air supply system of the refrigeration equipment, which are provided by the embodiment of the disclosure, can realize the following technical effects:
when the starting state of the compressor of the water cooling equipment is starting, the air supply pressure difference is in a rapid increasing trend, and the increasing trend of the air supply pressure difference can be judged by comparing the air supply pressure difference with the preset pressure difference. The on-off of the bypass pipeline is controlled according to the matching condition of the air supply pressure difference and the preset pressure difference, so that the air supply pressure difference is reduced through the conduction of the bypass pipeline when the air supply pressure difference is in a rapid increasing trend, the pressure difference fault of an air supply system is avoided, and the operation reliability of the water cooling equipment is improved.
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 in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
fig. 1 is a schematic structural diagram of a refrigeration apparatus provided in an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a control method for an air supply system of a refrigeration appliance according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of another control method for an air supply system of a refrigeration appliance provided by an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another control method for an air supply system of a refrigeration appliance provided by an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another control method for an air supply system of a refrigeration appliance provided by an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of another control method for an air supply system of a refrigeration appliance provided by an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of another control method for an air supply system of a refrigeration appliance provided by an embodiment of the present disclosure;
FIG. 8 is a schematic diagram of a control apparatus for an air supply system of a refrigeration appliance according to an embodiment of the present disclosure;
fig. 9 is a schematic diagram of another control device for an air supply system of a refrigeration device provided by an embodiment of the disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. 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 be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.
As shown in fig. 1, an embodiment of the present disclosure provides a refrigeration apparatus including a compressor 10, an evaporator 20, a condenser 40, and an air supply system. The compressor 10, the evaporator 20, and the condenser 40 form a refrigerant circulation circuit. The air supply system includes an air supply tank 30, an electrical heating assembly 50, and a controller. A bypass line 60 is provided between the air supply tank 30 and the evaporator 20. An auxiliary liquid supply line 80 is provided between the gas supply tank 30 and the evaporator 20. The condenser 40 communicates with the evaporator 20 through an economizer 70. The bypass line 60 is provided with an electronic control 601. The controller is used to execute a control method for an air supply system of a refrigeration appliance as described below.
The compressor 10 may be an air-suspension compressor equipped with an air-suspension bearing, or may be a vapor-liquid mixture compressor. The gas supply tank 30 is used to pump the liquid refrigerant in the evaporator 20 through the auxiliary liquid supply line 80 when the liquid level of the condenser 40 is low or the sub-cooled liquid level after the economizer 70 is pumped by the refrigerant pump. The electric heating element 50 is used for heating the refrigerant in the air supply tank 30 to form a vapor-liquid two-phase refrigerant, and supplying the vapor-liquid two-phase refrigerant to the compressor 10, so as to supply air to the air bearing of the compressor 10. The refrigerant in the air supply tank 30 may be a liquid refrigerant or a vapor-liquid two-phase refrigerant.
With reference to fig. 2, an embodiment of the present disclosure further provides a control method for an air supply system of a refrigeration device, including:
and S01, the refrigeration equipment acquires the starting state of the compressor.
And S02, the refrigeration equipment obtains the air supply pressure difference of the air supply system according to the starting state of the compressor.
And S03, controlling the on-off state of the bypass pipeline by the refrigeration equipment according to the matching condition of the air supply pressure difference and the preset pressure difference.
By adopting the control method for the air supply system of the refrigeration equipment provided by the embodiment of the disclosure, when the compressor of the air suspension unit is started, the air supply pressure difference is in a rapid increasing trend, and the increasing trend of the air supply pressure difference can be judged by comparing the air supply pressure difference with the preset pressure difference. The on-off of the bypass pipeline is controlled according to the matching condition of the air supply pressure difference and the preset pressure difference, so that the air supply pressure difference is reduced through the conduction of the bypass pipeline when the air supply pressure difference is in a rapid increasing trend, the pressure difference fault of an air supply system is avoided, and the running reliability of the air suspension unit is improved.
Optionally, as shown in fig. 3, obtaining the air supply pressure difference of the air supply system according to the starting state of the compressor includes:
and S11, when the starting state of the compressor indicates that the compressor is started, the refrigeration equipment acquires the bearing exhaust pressure information of the compressor and the air supply pressure information of the air supply tank.
And S12, the refrigeration equipment obtains the air supply pressure difference of the air supply system according to the difference value of the bearing exhaust pressure information and the air supply pressure information.
Thus, the air supply pressure information refers to the air supply pressure value of the air supply tank, and the bearing exhaust pressure information refers to the bearing exhaust pressure value in the compressor. The air supply pressure difference is the difference value of the pressure value of the air supply tank and the bearing exhaust pressure value of the compressor, the change trend of the bearing exhaust pressure value and the pressure value of the evaporator is consistent, when the compressor of the air suspension unit is started, the pressure value of the evaporator is rapidly reduced, therefore, when the pressure value of the evaporator is rapidly reduced, the bearing exhaust pressure is also rapidly reduced, the pressure value of the air supply tank is basically maintained, and the air supply pressure difference is in a rapid increasing trend.
With reference to fig. 4, an embodiment of the present disclosure further provides a control method for an air supply system of a refrigeration apparatus, where the preset pressure difference includes a first preset pressure value, and the method includes:
and S21, the refrigeration equipment acquires the starting state of the compressor.
And S22, the refrigeration equipment obtains the air supply pressure difference of the air supply system according to the starting state of the compressor.
And S23, the refrigeration equipment acquires the on-off state of the bypass pipeline.
And S24, controlling the electric control element to execute an opening control instruction under the condition that the on-off state of the bypass pipeline is disconnected and the air supply pressure difference is greater than a first preset pressure value so as to control the on-off state of the bypass pipeline to be switched to be opened.
By adopting the control method for the refrigeration equipment air supply system provided by the embodiment of the disclosure, when the on-off state of the bypass pipeline is off and the air supply pressure difference is greater than the first preset pressure value, it is indicated that the pressure value of the vapor-liquid two-phase refrigerant in the air supply tank is higher, and the air supply system is likely to have a pressure difference fault, at the moment, the bypass pipeline is controlled to be opened, so that the vapor-liquid two-phase refrigerant in the air supply tank is drained to the inside of the evaporator through the opening of the bypass pipeline, and the operation reliability of the gas suspension unit is improved.
With reference to fig. 5, an embodiment of the present disclosure further provides a control method for an air supply system of a refrigeration apparatus, where the preset pressure difference includes a first preset pressure value, and the method includes:
and S31, the refrigeration equipment acquires the starting state of the compressor.
And S32, the refrigeration equipment obtains the air supply pressure difference of the air supply system according to the starting state of the compressor.
And S33, the refrigeration equipment acquires the on-off state of the bypass pipeline.
And S34, controlling the electric control element to execute an opening control instruction under the condition that the on-off state of the bypass pipeline is disconnected and the air supply pressure difference is greater than a first preset pressure value so as to control the on-off state of the bypass pipeline to be switched to be opened.
And S35, the refrigeration equipment acquires the starting time length information of the compressor.
And S36, the refrigeration equipment acquires the time delay duration information of the compressor under the condition that the starting duration information indicates the completion of the starting of the compressor.
And S37, controlling the electric control element to execute the turn-off control instruction under the condition that the refrigeration equipment turns off after the delay time duration information indicates that the compressor is delayed for the preset delay time duration.
By adopting the control method for the air supply system of the refrigeration equipment, provided by the embodiment of the disclosure, after vapor-liquid two-phase refrigerant of the air supply tank is guided to the inside of the evaporator through the bypass pipeline, the pressure value of the air supply tank is in a descending trend. And when the starting time length information indicates that the compressor is turned off after the compressor is started for the preset time delay time length, the air supply pressure difference is basically stable, and the gas-liquid two-phase refrigerant of the air supply tank does not need to be continuously drained into the evaporator, so that the electric control element is controlled to execute a control instruction of turning off, and the air supply pressure difference is continuously kept stable.
Optionally, the completion of the start of the compressor is determined as follows:
the starting time length information is matched with the preset starting time length. As an example, the start duration information matches a preset start duration, or the start duration information is greater than or equal to the preset start duration information, or the start duration information is within a preset range corresponding to the preset start duration.
Optionally, the compressor is turned off after the preset delay time duration is determined according to the following method:
the delay time length information is matched with the preset delay time length. As an example, the delay time duration information matches a preset delay time duration, or the delay time duration information is located in a preset range corresponding to the preset delay time duration.
Wherein, the preset time delay duration can be preset by the refrigeration equipment. As an example, the preset delay time period is greater than or equal to 1 second or less than or equal to 200 seconds.
With reference to fig. 6, an embodiment of the present disclosure further provides a control method for an air supply system of a refrigeration apparatus, where the preset pressure difference includes a first preset pressure value, and the method includes:
and S41, the refrigeration equipment acquires the starting state of the compressor.
And S42, the refrigeration equipment obtains the air supply pressure difference of the air supply system according to the starting state of the compressor.
And S43, the refrigeration equipment acquires the on-off state of the bypass pipeline.
And S44, controlling the electric control element to execute an opening control instruction under the condition that the on-off state of the bypass pipeline is disconnected and the air supply pressure difference is greater than a first preset pressure value so as to control the on-off state of the bypass pipeline to be switched to be opened.
And S45, the refrigeration equipment regains the air supply pressure difference.
And S46, controlling the electric control element to execute a turn-off control instruction when the new air supply pressure difference is smaller than the preset air supply pressure difference.
By adopting the control method for the air supply system of the refrigeration equipment provided by the embodiment of the disclosure, when the new air supply pressure difference is smaller than the preset air supply pressure difference, the air supply pressure difference is basically stable, and at the moment, the vapor-liquid two-phase refrigerant of the air supply tank does not need to be continuously drained into the evaporator, so that the electric control element is controlled to execute a turn-off control instruction, and the air supply pressure difference is continuously kept stable.
With reference to fig. 7, an embodiment of the present disclosure further provides a control method for an air supply system of a refrigeration apparatus, where the preset pressure difference includes a first preset pressure value, and the method includes:
and S51, the refrigeration equipment acquires the starting state of the compressor.
And S52, the refrigeration equipment obtains the air supply pressure difference of the air supply system according to the starting state of the compressor.
And S53, the refrigeration equipment acquires the on-off state of the bypass pipeline.
And S54, controlling the electric control element to execute an opening control instruction under the condition that the on-off state of the bypass pipeline is disconnected and the air supply pressure difference is greater than a first preset pressure value so as to control the on-off state of the bypass pipeline to be switched to be opened.
S55, the refrigeration appliance regains a new supply air pressure differential for the air supply system.
And S56, controlling the electric control element to execute a turn-off control instruction under the condition that the new air supply pressure difference of the refrigeration equipment is matched with the second preset pressure value.
And the second preset pressure value is smaller than the first preset pressure value.
By adopting the control method for the air supply system of the refrigeration equipment, provided by the embodiment of the disclosure, after vapor-liquid two-phase refrigerant of the air supply tank is guided to the inside of the evaporator through the bypass pipeline, the pressure value of the air supply tank is in a descending trend. Normally, the electronic control elements are regulated by means of PID. During the pressure regulation in the PID mode, the pressure value of the air supply tank floats to a certain extent, when the pressure value of the air supply tank is reduced to a second preset pressure value, the trend that the air supply pressure difference is rapidly increased is effectively controlled, at the moment, the gas-liquid two-phase refrigerant of the air supply tank does not need to be drained into the evaporator, and therefore a new air supply pressure difference of the air supply system is obtained again, and when the new air supply pressure difference is matched with the second preset pressure value, the electric control element is controlled to execute a control instruction of turning off.
It should be noted that the new air supply pressure difference is matched with the second preset pressure value, and the new air supply pressure difference may be smaller than or equal to the second preset pressure value, or may be within a preset range corresponding to the second preset pressure value.
Optionally, the first preset pressure value and the second preset pressure value are determined according to the following method:
and determining a first preset pressure value according to the turn-off pressure threshold of the electric heating assembly. And determining a second preset pressure value according to the driving pressure threshold value of the electric heating assembly.
Optionally, the first preset pressure value is greater than or equal to a sum of a shut-off pressure threshold of the electric heating assembly and the first pressure difference component.
Wherein the first pressure difference component is greater than or equal to 1kPa and less than or equal to 100 kPa.
Optionally, the second preset pressure value is greater than or equal to a sum of the activation pressure threshold of the electric heating assembly and the second pressure difference component.
The second differential pressure component is greater than or equal to 1kPa and less than or equal to 100 kPa.
Optionally, the electronic control element includes an electronic expansion valve, and the control instruction for controlling the electronic control element to execute opening includes:
and controlling the electronic expansion valve to be opened at a preset opening degree.
Therefore, the flow of the refrigerant in the opened bypass pipeline can be controlled by controlling the opening degree of the electronic expansion valve, and the running reliability of the air suspension unit is further improved.
Alternatively, the electronic control element may be a solenoid valve or a pressure regulating valve.
In practical applications, a bypass line 60 is provided between the supply tank 30 and the evaporator 20. Bypass line 60 is configured with an electronic expansion valve. The control method for the air supply system of the refrigeration equipment executes the following steps:
first, the controller acquires the starting state of the compressor as starting, and acquires the air supply pressure difference of the air supply system according to the starting state.
And secondly, the controller acquires that the on-off state of the bypass pipeline is off, and the air supply pressure difference is larger than a first preset pressure value through judgment, so that the electronic expansion valve is controlled to be opened by a preset opening degree, the on-off state of the bypass pipeline is controlled to be switched to be opened, and the gas-liquid two-phase refrigerant of the air supply tank is guided to the inside of the evaporator to realize pressure relief.
And finally, after the electronic expansion valve is opened for a preset time, the controller acquires a new air supply pressure difference again, and the new air supply pressure difference is smaller than a second preset pressure value through judgment. Therefore, the controller controls the electronic expansion valve to be closed when the pressure relief of the electronic expansion valve is determined to be finished.
Referring to fig. 8, an embodiment of the present disclosure provides a control apparatus for an air supply system of a refrigeration device, including an obtaining module 201, a determining module 202, and an executing module 203. The acquisition module 201 is configured to acquire a start-up state of the compressor; the determining module 202 is configured to obtain a gas supply pressure difference of the gas supply system according to a starting state of the compressor; the execution module 203 is configured to control the on-off state of the bypass pipeline according to the matching condition of the air supply pressure difference and a preset pressure difference.
By adopting the control device for the refrigeration equipment air supply system, provided by the embodiment of the disclosure, the pressure difference fault of the air supply system can be avoided, and the operation reliability of the air suspension unit is improved.
As shown in fig. 9, the embodiment of the present disclosure provides a control device for an air supply system of a refrigeration device, which includes a processor (processor)100 and a memory (memory) 101. Optionally, the apparatus may also include 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 a bus 103. The communication interface 102 may be used for information transfer. The processor 100 may invoke logic instructions in the memory 101 to perform the control method for the air supply system of the refrigeration appliance of the above-described embodiment.
In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by executing program instructions/modules stored in the memory 101, namely, implements the control method for the air supply system of the refrigeration equipment in the above embodiment.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides a refrigeration device, which comprises the control device for the air supply system of the refrigeration device.
The disclosed embodiments provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described control method for a refrigeration appliance air supply system.
The disclosed embodiments provide a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the above-described control method for a refrigeration appliance air supply system.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify 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. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "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, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would 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 may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart 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 disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A control method for an air supply system of a refrigeration device, the air supply system comprising an air supply tank, characterized in that a bypass line is provided between the air supply tank and an evaporator, the method comprising:
acquiring a starting state of a compressor;
acquiring the air supply pressure difference of the air supply system according to the starting state of the compressor;
and controlling the on-off state of the bypass pipeline according to the matching condition of the air supply pressure difference and the preset pressure difference.
2. The method of claim 1, wherein obtaining the air supply pressure difference of the air supply system according to the starting state of the compressor comprises:
acquiring bearing exhaust pressure information of the compressor and air supply pressure information of the air supply tank under the condition that the starting state of the compressor indicates that the compressor is started;
and obtaining the air supply pressure difference of the air supply system according to the difference value of the bearing exhaust pressure information and the air supply pressure information.
3. The method according to claim 1, wherein the preset pressure difference comprises a first preset pressure value, the bypass pipeline is provided with an electric control element, and the controlling of the on-off state of the bypass pipeline according to the matching condition of the air supply pressure difference and the preset pressure difference comprises:
acquiring the on-off state of the bypass pipeline;
and under the condition that the on-off state of the bypass pipeline is disconnected and the air supply pressure difference is greater than a first preset pressure value, controlling the electric control element to execute an opening control instruction so as to control the on-off state of the bypass pipeline to be switched to be opened.
4. The method according to claim 3, wherein after the controlling the electrically controlled element to execute the control command for opening, further comprising:
acquiring starting time length information of the compressor;
acquiring delay time length information of the compressor under the condition that the starting time length information represents that the compressor is started;
under the condition that the delay time duration information indicates that the compressor is turned off after delaying the preset delay time duration, controlling the electric control element to execute a control instruction of turning off; alternatively, the first and second electrodes may be,
regaining said supply air pressure differential;
and under the condition that the new air supply pressure difference is smaller than the preset air supply pressure difference, controlling the electric control element to execute a control instruction of turning off.
5. The method of claim 3, wherein the preset pressure difference further comprises a second preset pressure value, and after the controlling the electrically controlled element to execute the opening control command, further comprises:
re-acquiring a new air supply pressure difference of the air supply system;
under the condition that the new air supply pressure difference is matched with a second preset pressure value, controlling the electric control element to execute a control instruction of turning off;
wherein the second preset pressure value is smaller than the first preset pressure value.
6. The method as claimed in claim 5, wherein the gas supply system further comprises an electric heating assembly for heating the gas-liquid two-phase refrigerant of the gas supply tank to form a gas-liquid two-phase refrigerant to be supplied to the compressor, and the first preset pressure value and the second preset pressure value are determined as follows:
determining the first preset pressure value according to a turn-off pressure threshold value of the electric heating assembly;
and determining the second preset pressure value according to the driving pressure threshold value of the electric heating assembly.
7. The method according to any one of claims 3 to 6, wherein the electrically controlled element comprises an electronic expansion valve, and the controlling the electrically controlled element to execute the control command for opening comprises:
and controlling the electronic expansion valve to be opened at a preset opening degree.
8. A control apparatus for a refrigeration appliance air supply system comprising a processor and a memory having stored thereon program instructions, wherein the processor is configured to execute the control method for a refrigeration appliance air supply system of any of claims 1 to 7 when executing the program instructions.
9. Refrigeration device comprising an air supply system provided with an air supply tank, characterized in that a bypass line is provided between the air supply tank and the evaporator, the refrigeration device further comprising a control device for an air supply system of a refrigeration device according to claim 8.
10. A storage medium storing program instructions, characterized in that said program instructions, when executed, perform a control method for a refrigeration appliance air supply system according to any one of claims 1 to 7.
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