CN113945029A - Method and device for controlling refrigerant circulation system and refrigerant circulation system - Google Patents

Method and device for controlling refrigerant circulation system and refrigerant circulation system Download PDF

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Publication number
CN113945029A
CN113945029A CN202111217435.8A CN202111217435A CN113945029A CN 113945029 A CN113945029 A CN 113945029A CN 202111217435 A CN202111217435 A CN 202111217435A CN 113945029 A CN113945029 A CN 113945029A
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China
Prior art keywords
pipeline
refrigerant
regulating valve
controlling
air suction
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Granted
Application number
CN202111217435.8A
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Chinese (zh)
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CN113945029B (en
Inventor
邓善营
张捷
王书森
毛守博
张晓锐
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Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Priority to CN202111217435.8A priority Critical patent/CN113945029B/en
Publication of CN113945029A publication Critical patent/CN113945029A/en
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Publication of CN113945029B publication Critical patent/CN113945029B/en
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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
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
    • 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
    • F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
    • 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
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/13—Vibrations
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The application discloses a method for controlling a refrigerant circulation system, the refrigerant circulation system comprising: compressor and refrigeration cycle circuit in it still includes: a first pipeline provided with a regulating valve and communicated with an air suction pipeline of the refrigeration cycle loop and configured to provide a refrigerant to the air suction pipeline so as to improve air suction pressure; the method comprises the following steps: acquiring a vibration value of the compressor; and under the condition that the vibration value is greater than or equal to the vibration threshold value, adjusting the opening of the regulating valve according to the vibration value. The refrigerant is conveyed to the air suction pipeline through the first pipeline, so that the air suction pressure of the system can be improved, and the compressor is prevented from surging. Meanwhile, the opening degree of the regulating valve can be regulated, so that the refrigerant quantity conveyed to the suction pipeline by the first pipeline can be regulated by controlling the opening degree of the regulating valve. The refrigerant quantity is properly adjusted according to the vibration value, so that the overlarge bypass quantity can be avoided, and the purpose of reducing energy consumption is achieved. The application also discloses a device and refrigerant circulation system for controlling refrigerant circulation system.

Description

Method and device for controlling refrigerant circulation system and refrigerant circulation system
Technical Field
The present disclosure relates to the field of refrigeration technologies, and in particular, to a method and an apparatus for controlling a refrigerant circulation system, and a refrigerant circulation system.
Background
A refrigeration cycle is an important component of a refrigeration apparatus, in which a compressor is one of core components of the refrigeration cycle. For the refrigeration cycle system, stable operation of the compressor is important.
The existing high-temperature working condition refrigeration air conditioner comprises a compressor (1), an expansion valve inlet pipeline (4), an air return pipeline (7), an electromagnetic valve (8), a throttling device (9), a bypass pipeline (10), a control switch (11) and a lead (12), wherein the expansion valve inlet pipeline (4) is communicated with the air return pipeline (7) through the bypass pipeline (10), and the electromagnetic valve (8) and the throttling device (9) are connected into the bypass pipeline (10).
It can be seen that in the above air conditioner, a bypass pipe is additionally provided. The refrigerant in the condenser is controlled to enter the return air pipeline through the electromagnetic valve arranged on the bypass pipeline, so that the return air pressure is reduced. However, after the solenoid valve is opened, the bypass flow cannot be adjusted. The bypass quantity is possibly too large, so that the cold energy of the unit is wasted, and the aim of saving energy cannot be fulfilled. Moreover, reducing the pressure in the return air line reduces the pressure difference between the suction pressure and the discharge pressure of the compressor, and cannot prevent the compressor from surging, which affects the stability of the compressor operation.
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 method and a device for controlling a refrigerant circulating system and the refrigerant circulating system, so as to reduce energy consumption while preventing compressor surge.
In some embodiments, the refrigerant circulation system includes: compressor and refrigeration cycle circuit in it still includes: a first pipeline provided with a regulating valve and communicated with an air suction pipeline of the refrigeration cycle loop and configured to provide a refrigerant to the air suction pipeline so as to improve air suction pressure; the method comprises the following steps: acquiring a vibration value of the compressor; and under the condition that the vibration value is greater than or equal to the vibration threshold value, adjusting the opening of the adjusting valve according to the vibration value.
In some embodiments, the apparatus comprises: a processor and a memory storing program instructions, the processor being configured to execute the aforementioned method for controlling a refrigerant circulation system when executing the program instructions.
In some embodiments, the refrigerant circulation system includes: compressor and refrigeration cycle circuit in it still includes: a first pipeline communicated with an air suction pipeline of the refrigeration cycle loop and configured to provide a refrigerant to the air suction pipeline to increase air suction pressure; the regulating valve is arranged on the first pipeline and is configured to control the flow of the refrigerant in the first pipeline; a second pipeline, through which a refrigerant flows, configured to exchange heat with the refrigerant in the first pipeline before the refrigerant in the first pipeline flows into the suction pipeline; the driving pump is arranged on the second pipeline and is configured to control the on-off of the second pipeline; the temperature of the refrigerant in the second pipeline is lower than that of the refrigerant in the first pipeline; and the device for controlling the refrigerant circulating system.
The method, the device and the refrigerant circulation system for controlling the refrigerant circulation system provided by the embodiment of the disclosure can realize the following technical effects:
a first pipeline communicated with the air suction pipeline is additionally arranged, and the first pipeline is provided with a regulating valve. When the vibration value is too large, the compressor is indicated to have a risk of surging. At this time, the opening of the regulating valve is controlled according to the vibration value. The refrigerant is conveyed to the air suction pipeline through the first pipeline, so that the air suction pressure of the system is improved, and the surge of the compressor is prevented. Meanwhile, the opening degree of the regulating valve can be regulated, so that the quantity of the refrigerant conveyed to the suction pipeline by the first pipeline can be regulated by controlling the opening degree of the regulating valve. Therefore, the refrigerant quantity can be properly adjusted according to the vibration value, and the phenomenon that the bypass quantity is too large is avoided, so that the purpose of reducing energy consumption is achieved.
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 diagram of a prior art refrigerating air conditioner under high temperature conditions;
fig. 2 is a schematic view of a refrigerant circulation system according to an embodiment of the disclosure;
fig. 3 is a schematic diagram illustrating a method for controlling a refrigerant circulation system according to an embodiment of the disclosure;
fig. 4 is a schematic diagram illustrating a method for controlling a refrigerant circulation system according to an embodiment of the disclosure, in which an opening of an adjusting valve is adjusted according to a vibration value;
fig. 5 is a schematic diagram illustrating another example of adjusting the opening of the regulating valve according to the vibration value in the method for controlling the refrigerant circulation system according to the embodiment of the disclosure;
fig. 6 is a schematic diagram illustrating another method for controlling a refrigerant circulation system according to an embodiment of the disclosure;
fig. 7 is a schematic diagram of another method for controlling a refrigerant circulation system according to an embodiment of the disclosure;
fig. 8 is a schematic diagram illustrating another method for controlling a refrigerant circulation system according to an embodiment of the disclosure;
fig. 9 is a schematic diagram of an apparatus for controlling a refrigerant circulation system according to an embodiment of the disclosure;
fig. 10 is a schematic view of another apparatus for controlling a refrigerant circulation system according to an embodiment of the disclosure.
Reference numerals:
10. a compressor; 11. a shock sensor; 20. a first heat exchanger; 30. a second heat exchanger; 40. an exhaust line; 50. a liquid path; 60. an air intake pipeline; 70. a first pipeline; 71. adjusting a valve; 80. a gas supply line; 81. an air supply tank; 90. a second pipeline; 91. driving the pump; 100. a plate heat exchanger.
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.
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.
Referring to fig. 2, an embodiment of the present disclosure provides a refrigerant circulation system, including: a compressor 10, a first heat exchanger 20 and a second heat exchanger 30. The discharge of the compressor 10 communicates with the first heat exchanger 20 through a discharge line 40. The first heat exchanger 20 is in communication with the second heat exchanger 30 via a fluid path 50. The second heat exchanger 30 communicates with the suction inlet of the compressor 10 via a suction line 60. Thus, the compressor 10, the first heat exchanger 20, and the second heat exchanger 30 form a refrigeration cycle circuit. Alternatively, the first heat exchanger 20 is a condenser and the second heat exchanger 30 is an evaporator. The compressor 10 is provided with a vibration sensor 11.
The system further comprises: a first conduit 70. The first line 70 is provided with a regulating valve 71. The first line 70 is connected to the suction line 60, and a high-pressure refrigerant flows therein. Alternatively, the regulating valve 71 is a proportional regulating valve, and the opening degree thereof may be regulated by a PID (proportional-integral-derivative). The high-pressure refrigerant is introduced into the suction line 60 through the first line 70, thereby increasing the suction pressure and preventing the compressor 10 from surging.
Alternatively, compressor 10 is an air-suspension compressor. The condenser communicates with the air supply side of the air suspension compressor 10 via an air supply line 80. The air supply line 80 is provided with an air supply tank 81. The source of high pressure refrigerant in the first line 70 may be a condenser and/or a high temperature and pressure refrigerant in the supply tank 81. That is, the refrigerant inlet of the first line 70 communicates with the condenser and/or supply tank 81, and the refrigerant outlet communicates with the suction line 60. In this way, the refrigerant is supplied to the suction line 60 by the condenser and/or the air supply tank 81 originally included in the system. The high-pressure refrigerant source is not required to be additionally arranged, so that the implementation is easy and the cost can be reduced.
Since the refrigerant in the condenser and the air supply tank 81 is a high temperature refrigerant, the high temperature refrigerant is directly introduced into the suction line 60, which is likely to cause suction overheating. Therefore, the system further comprises: a second conduit 90. A refrigerant flows through the second pipeline 90, and the temperature of the refrigerant is lower than that of the refrigerant in the first pipeline 70. The first pipe 70 exchanges heat with the second pipe 90 through the plate heat exchanger 100 before the refrigerant in the first pipe 70 flows into the suction pipe 60. Thus, the temperature of the refrigerant flowing into the intake pipe 60 is reduced, and the intake superheat is prevented from occurring.
Alternatively, the source of low temperature refrigerant in the second line 90 may be low temperature and low pressure refrigerant in the evaporator. That is, the refrigerant inlet of the second pipeline 90 is communicated with the evaporator. Optionally, the refrigerant outlet of the second pipeline 90 is also communicated with the evaporator. After entering the second pipeline 90, the low-temperature and low-pressure refrigerant in the evaporator exchanges heat with the high-temperature and high-pressure refrigerant in the first pipeline 70, and the refrigerant after heat exchange is recycled to the evaporator. Thus, the system originally has an evaporator, so that the low-temperature refrigerant in the evaporator exchanges heat with the high-temperature refrigerant in the first pipeline 70. And a low-temperature refrigerant source is not required to be additionally arranged, so that the implementation is easy and the cost can be reduced.
Optionally, a driving pump 91 is disposed on the second pipeline 90 to control the on/off of the second pipeline 90. When the temperature of the refrigerant supplied from the first pipe 70 is too high, the pump 91 is driven to be turned on. A low-temperature refrigerant flows through the second pipeline 90 to cool the refrigerant in the first pipeline 70. When the temperature of the refrigerant supplied from the first pipe line 70 is appropriate, the drive pump 91 is turned off. Thus, the driving pump 91 is turned on when necessary, and the power consumption can be reduced to some extent.
Alternatively, when the driving pump 91 needs to be turned on, the rotation speed of the driving pump 91 may be adjusted according to the temperature of the refrigerant supplied by the first pipeline 70. The flow rate of the low-temperature refrigerant in the second pipeline 90 can be adjusted by adjusting the rotation speed of the driving pump 91. Thus, the temperature of the refrigerant supplied from the first pipe 70 can be reduced to different degrees. That is, according to the temperature of the refrigerant supplied from the first pipe 70, the rotational speed of the driving pump 91 is varied, and thus the power consumption can be further reduced. Alternatively, the driving pump 91 is an air pump.
Referring to fig. 3, an embodiment of the present disclosure provides a method for controlling a refrigerant circulation system, including:
s301, the refrigerant circulating system acquires a vibration value of the compressor.
And S302, under the condition that the vibration value is greater than or equal to the vibration threshold value, the refrigerant circulating system adjusts the opening degree of the adjusting valve according to the vibration value.
The compressor of the refrigerant circulating system is provided with a vibration sensor. And acquiring a real-time vibration value V of the compressor through a vibration sensor. Setting a vibration threshold V1. Alternatively, V1Is 0.5 mm/s. If V ≧ V1Indicating that the compressor is at risk of surge. At this time, the opening degree of the regulating valve is adjusted according to the vibration value. The refrigerant with proper flow rate is provided to the suction pipeline through the first pipeline, so that the suction pressure is improved.
In the embodiment of the present disclosure, a first pipeline communicated with the air suction pipeline is additionally provided, and the first pipeline is provided with an adjusting valve. When the vibration value is too large, the compressor is indicated to have a risk of surging. At this time, the opening of the regulating valve is controlled according to the vibration value. The refrigerant is conveyed to the air suction pipeline through the first pipeline, so that the air suction pressure of the system is improved, and the surge of the compressor is prevented. Meanwhile, the opening degree of the regulating valve can be regulated, so that the quantity of the refrigerant conveyed to the suction pipeline by the first pipeline can be regulated by controlling the opening degree of the regulating valve. Therefore, the refrigerant quantity can be properly adjusted according to the vibration value, and the phenomenon that the bypass quantity is too large is avoided, so that the purpose of reducing energy consumption is achieved.
Optionally, as shown in fig. 4, the adjusting the opening of the adjusting valve according to the vibration value in the refrigerant circulation system includes:
s401, controlling the opening of the regulating valve to a preset initial opening degree by the refrigerant circulating system.
S402, under the condition that the adjusting valve is opened to the preset initial opening degree and the vibration value is larger than or equal to the vibration threshold value, the refrigerant circulating system controls the opening degree of the adjusting valve to increase at a first preset speed.
At V is more than or equal to V1In the case of (2), control is performed based on the vibration valueThe opening degree of the valve is adjusted. Firstly, controlling the regulating valve to open to a preset initial opening X%. And acquiring a real-time vibration value V of the compressor through a vibration sensor. If V is still greater than or equal to V1It is shown that the current opening X% of the regulating valve does not allow the vibration value of the compressor to be effectively reduced. Thus, the opening degree of the regulating valve is controlled to gradually increase at a first preset rate. Optionally, the first preset rate is a%/s, i.e. the regulating valve is opened a% per second. Therefore, the flow rate of the refrigerant supplied to the suction pipeline by the first pipeline can be increased, so that the suction pressure is further increased, and the vibration value of the compressor is reduced.
Optionally, as shown in fig. 5, the adjusting the opening of the adjusting valve according to the vibration value in the refrigerant circulation system includes:
s501, controlling the opening of the regulating valve to be a preset initial opening degree by the refrigerant circulating system.
And S502, under the condition that the regulating valve is opened to the preset initial opening and the vibration value is greater than or equal to the vibration threshold value, the refrigerant circulating system controls the opening of the regulating valve to increase at a first preset rate.
And S503, under the condition that the vibration value is smaller than the vibration threshold value, the refrigerant circulating system controls the regulating valve to keep the current opening.
At V is more than or equal to V1In the case of (3), the opening degree of the regulating valve is controlled based on the vibration value. Firstly, controlling the regulating valve to open to a preset initial opening X%. And acquiring a real-time vibration value V of the compressor through a vibration sensor. If V is reduced to V1Hereinafter, it is explained that the vibration value of the compressor is reduced and there is no risk of surging. At this time, the control regulating valve keeps the current opening degree X%. If V is still greater than or equal to V1It is shown that the current opening X% of the regulating valve does not allow the vibration value of the compressor to be effectively reduced. Thus, the opening degree of the regulating valve is controlled to gradually increase at a first preset rate. Optionally, the first preset rate is a%/s, i.e. the regulating valve is opened a% per second. And in the process of increasing the opening of the regulating valve, acquiring a real-time vibration value V of the compressor through the vibration sensor. At the point that V is reduced to V1When the current opening degree (X + a X K) percent is maintained, the control regulating valve is controlled to maintain the current opening degree (X + a X K), wherein K is the time when the opening degree of the regulating valve is increased at a first preset speed rateAnd time, in seconds. Thus, at V ≧ V1In this case, the flow rate of the refrigerant supplied from the first pipe to the suction pipe can be increased. Thereby further increasing the suction pressure and reducing the vibration value of the compressor. At the point that V is reduced to V1In the following, it is not necessary to increase the opening degree of the control valve. In this case, the control valve may be set to maintain the current opening degree. Thus, on the one hand, V < V can be guaranteed1On the other hand, the problem of energy consumption increase caused by continuously increasing the opening degree of the regulating valve can be avoided.
Optionally, with reference to fig. 6, another method for controlling a refrigerant circulation system according to an embodiment of the present disclosure includes:
s601, the refrigerant circulation system acquires the vibration value.
And S602, under the condition that the vibration value is greater than or equal to the vibration threshold value, the refrigerant circulating system adjusts the opening degree of the adjusting valve according to the vibration value.
And S603, sending alarm information by the refrigerant circulating system under the condition that the opening of the regulating valve is the maximum opening and the vibration value is greater than or equal to the vibration threshold value.
And in the process of controlling the opening of the regulating valve, acquiring a real-time vibration value V of the compressor through a vibration sensor. If the opening of the regulating valve is maximum, but V is still greater than or equal to V1It shows that the vibration value of the compressor can not be effectively reduced by controlling the opening of the regulating valve. In this case, the alarm information is transmitted in time. Therefore, the alarm can be given in time under the condition that the adjusting valve is ineffective in adjusting the suction pressure, so that the staff can process the alarm in time.
It should be noted that, the specific implementation process of steps S601 and S602 may refer to the foregoing embodiment, and details are not described here.
Optionally, with reference to fig. 7, another method for controlling a refrigerant circulation system according to an embodiment of the present disclosure includes:
s701, the refrigerant circulating system acquires a vibration value of the compressor.
S702, under the condition that the vibration value is greater than or equal to the vibration threshold value, the refrigerant circulating system adjusts the opening degree of the adjusting valve according to the vibration value; and the refrigerant circulating system controls the on-off of the second pipeline according to the superheat degree of the air suction pipeline.
The compressor of the refrigerant circulating system is provided with a vibration sensor. And acquiring a real-time vibration value V of the compressor through a vibration sensor. Setting a vibration threshold V1. If V ≧ V1Indicating that the compressor is at risk of surge. At this time, the opening degree of the regulating valve is adjusted according to the vibration value. The refrigerant with proper flow rate is provided to the suction pipeline through the first pipeline, so that the suction pressure is improved. In the case where the source of the high pressure refrigerant in the first line 70 is the condenser and/or the high temperature and high pressure refrigerant in the supply tank 81, the superheat of the suction line needs to be monitored in real time. Detecting suction pressure P of compressor by temperature sensor and pressure sensor at suction port of compressor1And an intake temperature T, and detecting an exhaust pressure P by a pressure sensor provided in the exhaust line2。
The calculation formula of the saturation pressure of the refrigerant corresponding to the saturation temperature is as follows: t isFull of＝-2.3691*P1+21.434*P1-78.312*P1+150.32*P1-170.29*P1+144.71*P1-22.567. Suction superheat T of the systemSuperheating＝T-TFull ofThe pressure ratio of the system is X ═ P2+101)/(P1+101). Thus, the degree of superheat of the intake line is obtained. And controlling the on-off of the second pipeline according to the superheat degree of the air suction pipeline, so as to control whether the temperature of the refrigerant provided by the first pipeline is reduced. Therefore, the suction overheating caused by the overhigh temperature of the refrigerant provided by the first pipeline is avoided.
Optionally, with reference to fig. 8, another method for controlling a refrigerant circulation system according to an embodiment of the present disclosure includes:
s801, the refrigerant circulation system acquires a vibration value of the compressor.
S802, under the condition that the vibration value is larger than or equal to the vibration threshold value, the refrigerant circulating system adjusts the opening degree of the adjusting valve according to the vibration value; and controlling the on-off of the second pipeline according to the superheat degree of the air suction pipeline.
And S803, when the opening of the regulating valve is the maximum opening and the vibration value is greater than or equal to the vibration threshold value, the refrigerant circulating system sends alarm information.
Thus, the opening of the regulating valve is controlled according to the vibration value, thereby controlling the flow rate of the refrigerant supplied to the suction pipeline. Meanwhile, the on-off of the second pipeline is controlled according to the superheat degree of the suction pipeline, so that the cooling degree of the refrigerant provided by the first pipeline is controlled. The double control of the suction pressure and the suction superheat degree is realized. And moreover, under the condition that the regulation of the regulating valve is invalid, alarm information is sent, and a worker can be reminded of processing in time. It should be noted that, for the specific implementation process of steps S801, S802, and S803, reference may be made to the above embodiments, and details are not described here again.
Optionally, the refrigerant circulation system controls the on-off of the second pipeline according to the temperature of the suction pipeline, including:
and under the condition that the superheat degree of the air suction pipeline is smaller than the superheat degree threshold value, the refrigerant circulating system controls the second pipeline to be disconnected.
And under the condition that the superheat degree of the air suction pipeline is greater than or equal to a superheat degree threshold value, the refrigerant circulating system controls the second pipeline to be communicated.
Setting a superheat threshold Tm. Alternatively, TmIs 5 degrees. Calculating the real-time suction superheat degree T according to the calculation formulaSuperheating. If T isSuperheating＜TmThe superheat degree of the suction line is within a suitable range. In this case, since it is not necessary to cool the refrigerant supplied from the first pipe, the second pipe is controlled to be disconnected. If T isSuperheating≥TmIt is explained that the overheating degree of the air suction pipeline is too high, which causes the system to suck air and overheat. In this case, the refrigerant supplied from the first pipe needs to be cooled, and therefore the second pipe is controlled to communicate with the first pipe. Therefore, the second pipeline is controlled to be communicated under the condition that the refrigerant provided by the first pipeline needs to be cooled by comparing the superheat degree of the air suction pipeline with the superheat degree threshold value. The problem of energy consumption increase caused by always keeping the second pipeline communicated can be avoided.
Optionally, in step S602, the refrigerant circulation system controls the second pipeline to communicate, including:
the refrigerant circulating system obtains the opening degree of the regulating valve.
The refrigerant circulating system adjusts the rotating speed of the driving pump according to the opening degree of the adjusting valve.
According to the structure of the system, the second pipeline is provided with the driving pump. The connection or disconnection of the second pipeline can be controlled by controlling the on or off of the driving pump. And after the regulating valve is opened, the opening degree of the regulating valve is acquired in real time. And adjusting the rotating speed of the driving pump according to the opening degree of the adjusting valve. Therefore, the rotating speed of the driving pump is matched with the opening degree of the regulating valve in real time, and the suction pressure and the suction superheat degree are cooperatively controlled by the driving pump and the regulating valve.
Optionally, the refrigerant circulation system adjusts the rotation speed of the driving pump according to the opening degree of the adjusting valve, and includes:
and under the condition that the regulating valve is opened to the preset initial opening, controlling the rotating speed of the driving pump to be operated to the preset initial rotating speed.
In the case where the opening degree of the regulating valve is increased at a first preset rate, the control determines that the rotation speed of the pump is increased at a second preset rate.
And under the condition that the regulating valve keeps the current opening degree, PID regulation is carried out on the rotating speed of the driving pump, so that the superheat degree of the air suction pipeline is maintained at a superheat degree threshold value.
The larger the opening degree of the regulating valve is, the larger the refrigerant flow provided by the first pipeline to the air suction pipeline is, and the higher the temperature of the air suction pipeline is. In order to effectively reduce the temperature of the air suction pipeline in time, the rotating speed of the driving pump is also matched with the opening of the regulating valve to be properly regulated. And under the condition that the regulating valve is opened to the preset initial opening X%, the rotating speed of the driving pump is matched with the preset initial opening X% of the regulating valve and runs to the preset initial rotating speed Y. In the case where the opening degree of the regulating valve is increased at a first preset rate, it is determined that the rotation speed of the pump is increased at a second preset rate. That is, the rotation speed of the drive pump increases in accordance with the increase in the opening degree of the regulator valve. Optionally, the second predetermined rate is N/s, i.e. the drive pump is increased by N revolutions per second. And under the condition that the regulating valve keeps the current opening degree, PID regulation is carried out on the rotating speed of the driving pump, so that the superheat degree of the air suction pipeline is maintained at a superheat degree threshold value. That is, when the current opening degree of the regulating valve is maintained, the pressure in the suction line is in the appropriate range. At this time, the rotation speed of the driving pump is only required to be adjusted, so that the superheat degree of the air suction pipeline is maintained at the superheat degree threshold value. Thus, the proper rotation speed of the driving pump is matched according to the opening degree of the regulating valve, and the suction pressure and the suction superheat degree can be controlled to be kept in the proper range. Thereby preventing the compressor from surging and improving the stability of the system operation.
Optionally, at the beginning of system operation, at V < V1In this case, the on-off states of the first and second lines, that is, the on-off states of the regulator valve and the drive pump, may be obtained. And if the regulating valve and the driving pump are opened, controlling the regulating valve and the driving pump to be closed. If the regulating valve and the driving pump are closed, the regulating valve and the driving pump are controlled to be kept closed. This ensures that V < V1In the case of (2), the regulating valve and the drive pump are closed, reducing the energy consumption to a certain extent.
Referring to fig. 9, an apparatus for controlling a refrigerant circulation system according to an embodiment of the present disclosure includes an obtaining module 901 and an adjusting module 902. The fetching module 901 is configured to obtain a vibration value of the compressor. The adjusting module 902 is configured to adjust the opening of the adjusting valve according to the shock value if the shock value is greater than or equal to the shock threshold value.
By adopting the device for controlling the refrigerant circulating system, the refrigerant can be conveyed to the air suction pipeline through the first pipeline, so that the air suction pressure of the system is improved, and the surge of the compressor is prevented. Meanwhile, the opening degree of the regulating valve can be regulated, so that the quantity of the refrigerant conveyed to the suction pipeline by the first pipeline can be regulated by controlling the opening degree of the regulating valve. Therefore, the refrigerant quantity can be properly adjusted according to the vibration value, and the phenomenon that the bypass quantity is too large is avoided, so that the purpose of reducing energy consumption is achieved.
Referring to fig. 10, an apparatus for controlling a refrigerant circulation system according to an embodiment of the present disclosure 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 call logic instructions in the memory 101 to execute the method for controlling the refrigerant circulation system according to the above 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, that is, implements the method for controlling the refrigerant circulation system in the above 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, 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 present disclosure provides a refrigerant circulation system, which includes a compressor 10, a first heat exchanger 20, a second heat exchanger 30, a first pipeline 70, a second pipeline 90, and the above-mentioned device for controlling a refrigerant circulation system. For specific embodiments of the compressor 10, the first heat exchanger 20, the second heat exchanger 30, the first pipeline 70, and the second pipeline 90, reference may be made to the above embodiments, and details are not repeated here.
The embodiment of the disclosure provides a storage medium storing computer-executable instructions configured to execute the method for controlling a refrigerant circulation system.
The storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable 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 method for controlling a refrigerant cycle system, the refrigerant cycle system comprising: compressor and refrigeration cycle circuit that its was located, its characterized in that still includes: a first pipeline provided with a regulating valve and communicated with an air suction pipeline of the refrigeration cycle loop and configured to provide a refrigerant to the air suction pipeline so as to improve air suction pressure; the method comprises the following steps:
acquiring a vibration value of the compressor;
and under the condition that the vibration value is greater than or equal to the vibration threshold value, adjusting the opening of the adjusting valve according to the vibration value.
2. The method of claim 1, wherein said adjusting the opening of the regulating valve based on the shock value comprises:
controlling the regulating valve to be opened to a preset initial opening degree;
and under the condition that the regulating valve is opened to the preset initial opening degree and the vibration value is greater than or equal to the vibration threshold value, controlling the opening degree of the regulating valve to increase at a first preset rate.
3. The method of claim 2, wherein said adjusting the opening of said regulating valve based on a shock value further comprises:
and controlling the regulating valve to keep the current opening degree under the condition that the vibration value is smaller than the vibration threshold value.
4. The method according to any one of claims 1 to 3, characterized in that after said adjusting the opening degree of the regulating valve according to the shock value, the method further comprises:
and sending alarm information under the condition that the opening degree of the regulating valve is the maximum opening degree and the vibration value is greater than or equal to the vibration threshold value.
5. The method of claim 3, wherein the refrigerant circulation system further comprises: the second pipeline is circulated with a refrigerant and is configured to exchange heat with the refrigerant in the first pipeline before the refrigerant in the first pipeline flows into the air suction pipeline, wherein the temperature of the refrigerant in the second pipeline is lower than that of the refrigerant in the first pipeline; in the case where the opening degree of the regulating valve is adjusted according to the shock value, the method further includes:
and controlling the on-off of the second pipeline according to the superheat degree of the air suction pipeline.
6. The method of claim 5, wherein said controlling the second circuit on and off based on the temperature of the inspiratory line comprises:
under the condition that the superheat degree of the air suction pipeline is smaller than a superheat degree threshold value, the second pipeline is controlled to be disconnected;
and controlling the second pipeline to be communicated under the condition that the superheat degree of the air suction pipeline is greater than or equal to the superheat degree threshold value.
7. The method of claim 6, wherein the second conduit is provided with a drive pump; the controlling the second pipeline to communicate includes:
acquiring the opening degree of the regulating valve;
and adjusting the rotating speed of the driving pump according to the opening of the adjusting valve.
8. The method of claim 7, wherein said adjusting the rotational speed of the drive pump based on the opening of the regulator valve comprises:
under the condition that the regulating valve is opened to a preset initial opening degree, controlling the rotating speed of the driving pump to run to a preset initial rotating speed;
controlling the rotation speed of the driving pump to increase at a second preset rate under the condition that the opening degree of the regulating valve increases at a first preset rate;
and performing PID (proportion integration differentiation) adjustment on the rotating speed of the driving pump under the condition that the adjusting valve keeps the current opening degree, so that the superheat degree of the air suction pipeline is maintained at the superheat degree threshold value.
9. An apparatus for controlling a coolant circulation system, comprising a processor and a memory storing program instructions, wherein the processor is configured to execute the method for controlling a coolant circulation system according to any one of claims 1 to 8 when executing the program instructions.
10. The utility model provides a refrigerant cycle system, compressor and refrigeration cycle return circuit at place which characterized in that still includes:
a first pipeline communicated with an air suction pipeline of the refrigeration cycle loop and configured to provide a refrigerant to the air suction pipeline to increase air suction pressure;
the regulating valve is arranged on the first pipeline and is configured to control the flow of the refrigerant in the first pipeline;
a second pipeline, through which a refrigerant flows, configured to exchange heat with the refrigerant in the first pipeline before the refrigerant in the first pipeline flows into the suction pipeline;
the driving pump is arranged on the second pipeline and is configured to control the on-off of the second pipeline;
the temperature of the refrigerant in the second pipeline is lower than that of the refrigerant in the first pipeline; and the combination of (a) and (b),
the apparatus as claimed in claim 9, wherein the refrigerant circulation system is controlled by the control unit.
CN202111217435.8A 2021-10-19 2021-10-19 Method and device for controlling refrigerant circulation system and refrigerant circulation system Active CN113945029B (en)

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