CN113945029B - 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 PDFInfo
- Publication number
- CN113945029B CN113945029B CN202111217435.8A CN202111217435A CN113945029B CN 113945029 B CN113945029 B CN 113945029B CN 202111217435 A CN202111217435 A CN 202111217435A CN 113945029 B CN113945029 B CN 113945029B
- Authority
- CN
- China
- Prior art keywords
- refrigerant
- pipeline
- regulating valve
- pipe
- controlling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003507 refrigerant Substances 0.000 title claims abstract description 156
- 238000000034 method Methods 0.000 title claims abstract description 54
- 230000001105 regulatory effect Effects 0.000 claims abstract description 93
- 230000001276 controlling effect Effects 0.000 claims abstract description 52
- 238000005057 refrigeration Methods 0.000 claims abstract description 18
- 238000004891 communication Methods 0.000 claims description 9
- 230000004069 differentiation Effects 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 14
- 230000006870 function Effects 0.000 description 7
- 239000000306 component Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- 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 refrigerant circulation system, refrigerant circulation system includes: the compressor and the refrigeration cycle circuit where the compressor is located also comprise: a first pipe provided with a regulating valve and communicated with an air suction pipe of the refrigeration cycle circuit, and configured to supply a refrigerant to the air suction pipe so as to increase suction pressure; the method comprises the following steps: obtaining a vibration value of a compressor; and under the condition that the vibration value is larger 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 increased, and the compressor is prevented from surging. Meanwhile, the opening degree of the regulating valve can be regulated, so that the refrigerant quantity conveyed from the first pipeline to the suction pipeline can be regulated by controlling the opening degree of the regulating valve. The refrigerant quantity is properly regulated according to the vibration value, so that the excessive bypass quantity can be avoided, and the aim of reducing the energy consumption is fulfilled. The application also discloses a device for controlling the refrigerant circulation system and the refrigerant circulation system.
Description
Technical Field
The present application relates to the field of refrigeration technologies, and for example, to a method and an apparatus for controlling a refrigerant circulation system, and a refrigerant circulation system.
Background
The refrigeration cycle is an important component of a refrigeration appliance in which a compressor is one of the core components of the refrigeration cycle. For a refrigeration cycle system, stable operation of the compressor is critical.
The existing high-temperature working condition refrigeration air conditioner is shown in fig. 1, and 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 wire (12), wherein the bypass pipeline (10) is used for communicating the expansion valve inlet pipeline (4) with the air return pipeline (7), and the electromagnetic valve (8) and the throttling device (9) are connected in the bypass pipeline (10).
It can be seen that a bypass pipe is additionally arranged in the air conditioner. The electromagnetic valve arranged on the bypass pipeline controls the refrigerant in the condenser to enter the air return pipeline, so that the air return pressure is reduced. But the bypass flow cannot be adjusted after the solenoid valve is opened. The bypass amount is possibly too large, so that the unit cold energy is wasted, and the energy saving purpose cannot be achieved. And the pressure of the air return pipeline is reduced, so that the pressure difference between the suction pressure and the discharge pressure of the compressor is reduced, the surge of the compressor cannot be prevented, and the running stability of the compressor is affected.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a method and a device for controlling a refrigerant circulation system and the refrigerant circulation system, so as to reduce energy consumption while preventing compressor surge.
In some embodiments, the refrigerant circulation system includes: the compressor and the refrigeration cycle circuit where the compressor is located also comprise: a first pipe provided with a regulating valve and communicated with an air suction pipe of the refrigeration cycle, and configured to supply a refrigerant to the air suction pipe so as to increase suction pressure; the method comprises the following steps: obtaining a vibration value of the compressor; and under the condition that the vibration value is larger than or equal to a vibration threshold value, adjusting the opening of the regulating valve according to the vibration value.
In some embodiments, the apparatus comprises: the system comprises a processor and a memory storing program instructions, wherein the processor is configured to execute the method for controlling the refrigerant circulation system when the program instructions are executed.
In some embodiments, the refrigerant circulation system includes: the compressor and the refrigeration cycle circuit where the compressor is located also comprise: a first pipe connected to an air suction pipe of the refrigeration cycle and configured to supply a refrigerant to the air suction pipe to increase an 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 pipe through which a refrigerant flows, the second pipe being configured to exchange heat with the refrigerant in the first pipe before the refrigerant in the first pipe flows into the suction pipe; the driving pump is arranged on the second pipeline and is configured to control the on-off of the second pipeline; wherein the temperature of the refrigerant in the second pipeline is lower than that of the refrigerant in the first pipeline; and the aforementioned means for controlling the refrigerant circulation 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 a regulating valve is arranged on the first pipeline. In case of too large a vibration value, the compressor is at risk of surging. At this time, the opening degree of the regulating valve is controlled according to the vibration value. The refrigerant is conveyed to the suction pipeline through the first pipeline, so that the suction pressure of the system is 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 from the first pipeline to the suction 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 excessive bypass quantity 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 and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
FIG. 1 is a schematic diagram of a refrigeration air conditioner in a high temperature condition in the prior art;
FIG. 2 is a schematic diagram of a refrigerant circulation system provided by an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a method for controlling a refrigerant circulation system according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of adjusting an opening degree of a regulating valve according to a vibration value in a method for controlling a refrigerant circulation system according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another method for controlling a refrigerant circulation system according to an embodiment of the present disclosure, in which the opening of the regulating valve is adjusted according to a vibration value;
FIG. 6 is a schematic diagram of another method for controlling a refrigerant circulation system provided by an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of another method for controlling a refrigerant circulation system provided by an embodiment of the present disclosure;
FIG. 8 is a schematic diagram of another method for controlling a refrigerant circulation system provided by an embodiment of the present disclosure;
FIG. 9 is a schematic diagram of an apparatus for controlling a refrigerant circulation system according to an embodiment of the present disclosure;
fig. 10 is a schematic view of another apparatus for controlling a refrigerant circulation system according to an embodiment of the present disclosure.
Reference numerals:
10. a compressor; 11. a vibration sensor; 20. a first heat exchanger; 30. a second heat exchanger; 40. an exhaust line; 50. a liquid path; 60. an air suction line; 70. a first pipeline; 71. a regulating valve; 80. an air supply line; 81. a gas supply tank; 90. a second pipeline; 91. driving a pump; 100. a plate heat exchanger.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
Referring to fig. 2, an embodiment of the disclosure provides a refrigerant circulation system, including: a compressor 10, a first heat exchanger 20 and a second heat exchanger 30. The discharge port of the compressor 10 communicates with the first heat exchanger 20 through a discharge line 40. The first heat exchanger 20 communicates with the second heat exchanger 30 via a fluid path 50. The second heat exchanger 30 communicates with the suction port of the compressor 10 through a suction line 60. In this way, the compressor 10, the first heat exchanger 20, and the second heat exchanger 30 form a refrigeration cycle. 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 pipe 70 is provided with a regulating valve 71. The first pipe 70 communicates with the suction pipe 60, and a high-pressure refrigerant flows therein. Alternatively, the regulator valve 71 is a proportional regulator valve whose opening degree can be regulated by 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 is in communication 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 the high-pressure refrigerant in the first line 70 may be a condenser and/or a high-temperature high-pressure refrigerant in the air supply tank 81. That is, the refrigerant inlet of the first pipe 70 communicates with the condenser and/or the gas supply tank 81, and the refrigerant outlet communicates with the suction pipe 60. In this way, the refrigerant is supplied to the suction line 60 by the condenser and/or the supply tank 81 which the system originally has. The high-pressure refrigerant source is not needed to be additionally arranged, and the method is easy to implement and can reduce the cost.
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 pipe 60, and suction overheat is easily caused. Therefore, the system further comprises: a second conduit 90. The second pipe 90 is provided with a refrigerant, and the temperature of the refrigerant is lower than that of the refrigerant in the first pipe 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. In this way, the temperature of the refrigerant flowing into the suction line 60 is reduced, and the suction overheat is prevented.
Alternatively, the source of the low-temperature refrigerant in the second pipe 90 may be a low-temperature low-pressure refrigerant in the evaporator. That is, the refrigerant inlet of the second line 90 communicates with the evaporator. Optionally, the refrigerant outlet of the second conduit 90 is also in communication with the evaporator. After the low-temperature low-pressure refrigerant in the evaporator enters the second pipeline 90, the low-temperature low-pressure refrigerant exchanges heat with the high-temperature high-pressure refrigerant in the first pipeline 70, and the heat-exchanged refrigerant is recycled to the evaporator. In this way, the low-temperature refrigerant in the evaporator exchanges heat with the high-temperature refrigerant in the first pipe 70 by using the evaporator originally included in the system. The low-temperature refrigerant source is not needed to be additionally arranged, and the method is easy to implement and can reduce the cost.
Optionally, a driving pump 91 is disposed on the second pipeline 90 so as to control on-off of the second pipeline 90. In case the temperature of the refrigerant supplied from the first pipe 70 is too high, the driving pump 91 is turned on. The refrigerant in the first pipe 70 is cooled by passing the low-temperature refrigerant through the second pipe 90. In the case where the temperature of the refrigerant supplied from the first line 70 is appropriate, the driving pump 91 is turned off. In this way, the driving pump 91 is turned on when necessary, and power consumption can be reduced to some extent.
Alternatively, in the case where the driving pump 91 is required to be turned on, the rotation speed of the driving pump 91 may be adjusted according to the temperature of the refrigerant supplied from the first pipe 70. The flow rate of the low-temperature refrigerant in the second pipe 90 can be adjusted by adjusting the rotation speed of the driving pump 91. Thus, the cooling medium provided by the first pipeline 70 can be cooled to different degrees. That is, the power consumption can be further reduced by matching the rotational speeds of the driving pump 91 according to the temperature of the refrigerant supplied from the first pipe 70. Alternatively, the driving pump 91 is an air pump.
Referring to fig. 3, an embodiment of the disclosure provides a method for controlling a refrigerant circulation system, including:
s301, a refrigerant circulation system obtains a vibration value of a compressor.
S302, under the condition that the vibration value is larger than or equal to the vibration threshold value, the refrigerant circulation system adjusts the opening of the regulating valve according to the vibration value.
A vibration sensor is arranged on the compressor of the refrigerant circulation system. And acquiring a real-time vibration value V of the compressor through a vibration sensor. Setting a vibration threshold V 1 . Alternatively V 1 Is 0.5mm/s. If V is greater than or equal to V 1 Indicating that the compressor is at risk of surging. At this time, the opening degree of the regulating valve is adjusted according to the vibration value. So as to provide refrigerant with proper flow rate for the suction pipeline through the first pipeline, thereby improving suction pressure.
In the embodiment of the disclosure, a first pipeline communicated with an air suction pipeline is additionally arranged, and an adjusting valve is arranged on the first pipeline. In case of too large a vibration value, the compressor is at risk of surging. At this time, the opening degree of the regulating valve is controlled according to the vibration value. The refrigerant is conveyed to the suction pipeline through the first pipeline, so that the suction pressure of the system is 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. Therefore, the refrigerant quantity can be properly adjusted according to the vibration value, and the excessive bypass quantity is avoided, so that the purpose of reducing energy consumption is achieved.
Optionally, referring to fig. 4, the refrigerant circulation system adjusts the opening of the adjusting valve according to the vibration value, including:
s401, the refrigerant circulation system controls the regulating valve to be opened to a preset initial opening degree.
S402, when the regulating valve is opened to a preset initial opening degree and the vibration value is larger than or equal to the vibration threshold value, the refrigerant circulation system controls the opening degree of the regulating valve to be increased at a first preset speed.
At V is greater than or equal to V 1 In the case of (2), the opening degree of the regulator valve is controlled based on the vibration value. Firstly, the regulating valve is controlled to be opened to a preset initial opening degree 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 V 1 Indicating that the current opening X% of the regulating valve does not allow the vibration value of the compressor to be effectively reduced. Accordingly, the opening degree of the control valve is controlled to be gradually increased at the first preset rate. Alternatively, the first preset rate is a%/s, i.e. the regulating valve is opened a% per second. Therefore, the flow rate of the refrigerant provided by the first pipeline to the suction pipeline can be improved, so that the suction pressure is further improved, and the vibration value of the compressor is reduced.
Optionally, referring to fig. 5, the refrigerant circulation system adjusts the opening of the adjusting valve according to the vibration value, including:
s501, the refrigerant circulation system controls the regulating valve to be opened to a preset initial opening degree.
S502, when the regulating valve is opened to a preset initial opening degree and the vibration value is larger than or equal to the vibration threshold value, the refrigerant circulation system controls the opening degree of the regulating valve to be increased at a first preset speed.
S503, controlling the regulating valve to keep the current opening degree by the refrigerant circulation system under the condition that the vibration value is smaller than the vibration threshold value.
At V is greater than or equal to V 1 In the case of (2), the opening degree of the regulator valve is controlled based on the vibration value. Firstly, the regulating valve is controlled to be opened to a preset initial opening degree X%. And acquiring a real-time vibration value V of the compressor through a vibration sensor. If V falls to V 1 Hereinafter, it is explained that the vibration value of the compressor is reduced without a surge risk. At this time, the control regulator valve is controlled to maintain the current opening X%. If V is still greater than or equal to V 1 Indicating that the current opening X% of the regulating valve does not allow the vibration value of the compressor to be effectively reduced. Accordingly, the opening degree of the control valve is controlled to be gradually increased at the first preset rate. Alternatively, the first preset rate is a%/s, i.e. the regulating valve is opened a% per second. In the process of increasing the opening of the regulating valve, a real-time vibration value V of the compressor is obtained through a vibration sensor. At V to V 1 In the following, the control valve is controlled to maintain the current opening (x+a×k)%, where K is the time in seconds that the opening of the control valve increases at the first preset rate. Thus, when V is greater than or equal to V 1 In this case, the flow rate of the refrigerant supplied from the first line to the suction line can be increased. Thereby further increasing the suction pressure and reducing the vibration value of the compressor. At V to V 1 In the following, it is not necessary to increase the opening degree of the regulator valve. In this case, the control valve may be controlled to maintain the current opening degree. Thus, on the one hand V < V can be ensured 1 On the other hand, the problem of energy consumption increase caused by continuously increasing the opening degree of the regulating valve can be avoided.
Optionally, as shown in connection with fig. 6, another method for controlling a refrigerant circulation system is provided according to an embodiment of the present disclosure, including:
s601, the refrigerant circulation system acquires the vibration value.
S602, when the vibration value is larger than or equal to the vibration threshold value, the refrigerant circulation system adjusts the opening of the regulating valve according to the vibration value.
S603, when the opening degree of the regulating valve is the maximum opening degree and the vibration value is larger than or equal to the vibration threshold value, the refrigerant circulation system sends alarm information.
In the process of controlling the opening of the regulating valve, a real-time vibration value V of the compressor is obtained through a vibration sensor. If the opening of the regulating valve is maximum, V is still greater than or equal to V 1 Indicating that the vibration value of the compressor cannot be effectively reduced by controlling the opening degree of the regulating valve. In this case, the alarm information is sent in time. Therefore, the alarm can be given in time under the condition that the air suction pressure regulated by the regulating valve is invalid, so that staff can process in time.
It should be noted that, the specific implementation process of steps S601 and S602 is just described in the above embodiments, and will not be described herein.
Optionally, as shown in connection with fig. 7, another method for controlling a refrigerant circulation system is provided according to an embodiment of the disclosure, including:
s701, a refrigerant circulation system obtains a vibration value of a compressor.
S702, under the condition that the vibration value is larger than or equal to the vibration threshold value, the refrigerant circulation system adjusts the opening of the regulating valve according to the vibration value; the refrigerant circulation system controls the on-off of the second pipeline according to the superheat degree of the air suction pipeline.
A vibration sensor is arranged on the compressor of the refrigerant circulation system. And acquiring a real-time vibration value V of the compressor through a vibration sensor. Setting a vibration threshold V 1 . If V is greater than or equal to V 1 Indicating that the compressor is at risk of surging. At this time, the opening degree of the regulating valve is adjusted according to the vibration value. So as to provide refrigerant with proper flow rate for the suction pipeline through the first pipeline, thereby improving suction pressure. In the case where the source of the high-pressure refrigerant in the first line 70 is a high-temperature high-pressure refrigerant in the condenser and/or the air supply tank 81, it is necessary to monitor the degree of superheat of the suction line in real time. The suction pressure P of the compressor is detected by a temperature sensor and a pressure sensor provided in the suction port of the compressor 1 And an intake temperature T, and the exhaust pressure P is detected by a pressure sensor provided in the exhaust pipe 2 。
The calculation formula of the refrigerant saturation pressure corresponding to the saturation temperature is as follows: t (T) Saturation of ＝-2.3691*P 1 +21.434*P 1 -78.312*P 1 +150.32*P 1 -170.29*P 1 +144.71*P 1 -22.567. Suction superheat T of system Superheating ＝T-T Saturation of Pressure ratio x= (P) of system 2 +101)/(P 1 +101). Thus, the degree of superheat of the suction line is obtained. And controlling the on-off of the second pipeline according to the superheat degree of the air suction pipeline, thereby controlling whether to cool the refrigerant provided by the first pipeline. In this way, the overheat of the suction gas caused by the too high temperature of the refrigerant provided by the first pipeline is avoided.
Optionally, as shown in conjunction with fig. 8, another method for controlling a refrigerant circulation system is provided according to an embodiment of the disclosure, including:
s801, the refrigerant circulation system obtains 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 circulation system adjusts the opening of the regulating 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.
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 circulation system sends alarm information.
Thus, the opening of the regulating valve is controlled according to the vibration value, so as to control 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. Double control of suction pressure and suction superheat is realized. Moreover, under the condition that the regulation valve is not effective, alarm information is sent, and workers can be timely reminded to process. It should be noted that, the specific implementation process of steps S801, S802 and S803 is just described in the above embodiments, and will not be described herein.
Optionally, the refrigerant circulation system controls on-off of the second pipeline according to the temperature of the air suction pipeline, including:
and under the condition that the superheat degree of the suction pipeline is smaller than the superheat degree threshold value, the refrigerant circulation system controls the second pipeline to be disconnected.
And under the condition that the superheat degree of the suction pipeline is greater than or equal to the superheat degree threshold value, the refrigerant circulation system controls the second pipeline to be communicated.
Setting a superheat threshold T m . Alternatively T m Is 5 degrees. According to the calculation formula, calculating the real-time air suction superheat T Superheating . If T Superheating ＜T m Indicating that the superheat of the suction line is in a suitable range. In this case, the cooling medium supplied from the first pipe is not required, so that the second pipe is controlled to be disconnected. If T Superheating ≥T m It is indicated that too high a degree of superheat in the suction line can cause the system suction to overheat. In this case, the refrigerant supplied from the first pipe needs to be cooled, so that the second pipe is controlled to communicate. Therefore, by comparing the superheat degree of the air suction pipeline with the superheat degree threshold value, the second pipeline is controlled to be communicated under the condition that the cooling of the refrigerant provided by the first pipeline is required. The problem of increased energy consumption caused by always keeping the second pipeline connected can be avoided.
Optionally, in step S602, the refrigerant circulation system controls the second pipeline to communicate, including:
the refrigerant circulation system obtains the opening degree of the regulating valve.
The refrigerant circulation system adjusts the rotation speed of the driving pump according to the opening degree of the adjusting valve.
The structure of the system can be seen that the second pipeline is provided with a driving pump. By controlling the opening or closing of the drive pump, the connection or disconnection of the second pipe can be controlled. And after the regulating valve is opened, acquiring the opening of the regulating valve in real time. The rotation speed of the driving pump is adjusted according to the opening degree of the adjusting valve. Thus, the rotation speed of the driving pump is matched with the opening degree of the regulating valve in real time, and the driving pump and the regulating valve cooperatively control the suction pressure and the suction superheat degree.
Optionally, the refrigerant circulation system adjusts the rotation speed of the driving pump according to the opening degree of the adjusting valve, including:
and under the condition that the regulating valve is opened to a preset initial opening, controlling the rotating speed of the driving pump to operate to the preset initial rotating speed.
In the case where the opening degree of the regulating valve is increased at the first preset rate, the control determines that the rotation speed of the pump is increased at the second preset rate.
And under the condition that the current opening degree of the regulating valve is kept, PID (proportion integration differentiation) regulation is carried out on the rotating speed of the driving pump, so that the superheat degree of the air suction pipeline is kept at a superheat degree threshold value.
The larger the opening of the regulating valve is, the larger the refrigerant flow provided by the first pipeline to the suction pipeline is, and the higher the temperature of the 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 matched with the opening degree 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 the driving pump is operated to the preset initial rotating speed Y. In the case where the opening of the regulating valve is increased at the first preset rate, it is determined that the rotation speed of the pump is increased at the 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. Alternatively, the second preset rate is N/s, i.e., the pump is driven to increase in rotational speed N revolutions per second. And under the condition that the current opening degree of the regulating valve is kept, PID (proportion integration differentiation) regulation is carried out on the rotating speed of the driving pump, so that the superheat degree of the air suction pipeline is kept at a superheat degree threshold value. That is, when the current opening degree of the regulating valve is maintained, it is indicated that the pressure of the suction line is in a proper range at this time. 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. In this way, the suction pressure and the suction superheat degree can be controlled to be kept within the appropriate ranges by matching the appropriate driving pump rotation speed according to the opening degree of the regulating valve. Thereby preventing the compressor from surging and improving the running stability of the system.
Optionally, at the beginning of system operation, at V < V 1 Under the condition of (1), the on-off states of the first pipeline and the second pipeline, namely the on-off states of the regulating valve and the driving pump, can be obtained. If the regulating valve and the driving pump are opened, the regulating valve and the driving pump are controlled to be closed. If the regulator valve and the drive pump are closed, the regulator valve and the drive pump are controlled to remain closed. This ensures that V < V 1 In the case of (a), the regulating valve and the driving pump are closed, reducing the energy consumption to some extent.
Referring to fig. 9, an embodiment of the disclosure provides an apparatus for controlling a refrigerant circulation system, including an acquisition module 901 and an adjustment module 902. The taking module 901 is configured to obtain a vibration value of the compressor. The adjustment module 902 is configured to adjust the opening of the adjustment valve according to the shock value if the shock value is greater than or equal to the shock threshold.
By adopting the device for controlling the refrigerant circulation system, which is provided by the embodiment of the disclosure, 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 refrigerant quantity 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 excessive bypass quantity is avoided, so that the purpose of reducing energy consumption is achieved.
Referring to fig. 10, an embodiment of the present disclosure provides an apparatus for controlling a refrigerant circulation system, including a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via the bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to perform the method for controlling the refrigerant circulation system of the above-described embodiment.
Further, the logic instructions in the memory 101 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 101 is a computer readable storage medium that can be used to store a software program, a computer executable program, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes the program instructions/modules stored in the memory 101 to perform functional applications and data processing, i.e., to implement the method for controlling the refrigerant circulation system in the above-described 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, at least one application program required for a function; the storage data area may store data created according to the use of the terminal device, etc. Further, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The disclosed embodiment 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 the refrigerant circulation system. The specific implementation manners of the compressor 10, the first heat exchanger 20, the second heat exchanger 30, the first pipeline 70 and the second pipeline 90 are referred to the above embodiments, and are not repeated herein.
Embodiments of the present disclosure provide a storage medium storing computer-executable instructions configured to perform the above-described method for controlling a refrigerant circulation system.
The storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (9)
1. A method for controlling a refrigerant circulation system, the refrigerant circulation system comprising: the compressor and the refrigeration cycle circuit that it is located, its characterized in that still includes: a first pipe provided with a regulating valve and communicated with an air suction pipe of the refrigeration cycle, and configured to supply a refrigerant to the air suction pipe so as to increase suction pressure; a second pipe through which a refrigerant flows, the second pipe being configured to exchange heat with the refrigerant in the first pipe before the refrigerant in the first pipe flows into the suction pipe, wherein the temperature of the refrigerant in the second pipe is lower than the temperature of the refrigerant in the first pipe; the method comprises the following steps:
obtaining a vibration value of the compressor;
under the condition that the vibration value is larger than or equal to a vibration threshold value, adjusting the opening of the regulating 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.
2. The method of claim 1, wherein said adjusting the opening of the regulating valve according to the vibration value comprises:
controlling the regulating valve to be opened to a preset initial opening;
and controlling the opening of the regulating valve to increase at a first preset rate under the condition that the regulating valve is opened to the preset initial opening and the vibration value is larger than or equal to the vibration threshold.
3. The method according to claim 2, wherein adjusting the opening of the regulator valve according to the vibration value further comprises:
and under the condition that the vibration value is smaller than the vibration threshold value, controlling the regulating valve to keep the current opening.
4. A method according to any one of claims 1 to 3, characterized in that after said adjusting the opening degree of the adjusting valve according to the vibration value, the method further comprises:
and sending alarm information under the condition that the opening of the regulating valve is the maximum opening and the vibration value is larger than or equal to the vibration threshold value.
5. The method of claim 1, wherein controlling the on-off of the second circuit according to the temperature of the suction circuit comprises:
when 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 larger than or equal to the superheat degree threshold value.
6. The method of claim 5, wherein the second conduit is provided with a drive pump; said controlling said second conduit communication includes:
acquiring the opening of the regulating valve;
and adjusting the rotating speed of the driving pump according to the opening degree of the adjusting valve.
7. The method according to claim 6, wherein the adjusting the rotation speed of the driving pump according to the opening degree of the adjusting valve includes:
controlling the rotating speed of the driving pump to run to a preset initial rotating speed under the condition that the regulating valve is opened to a preset initial opening;
controlling the rotation speed of the driving pump to increase at a second preset rate under the condition that the opening of the regulating valve increases at the first preset rate;
and under the condition that the current opening degree of the regulating valve is kept, PID (proportion integration differentiation) regulation is carried out on the rotating speed of the driving pump, so that the superheat degree of the air suction pipeline is kept at the superheat threshold value.
8. An apparatus for controlling a refrigerant circulation system, comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for controlling a refrigerant circulation system according to any one of claims 1 to 7 when the program instructions are run.
9. The utility model provides a refrigerant circulation system, compressor and refrigeration cycle circuit at place thereof, its characterized in that still includes:
a first pipe connected to an air suction pipe of the refrigeration cycle and configured to supply a refrigerant to the air suction pipe to increase an 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 pipe through which a refrigerant flows, the second pipe being configured to exchange heat with the refrigerant in the first pipe before the refrigerant in the first pipe flows into the suction pipe;
the driving pump is arranged on the second pipeline and is configured to control the on-off of the second pipeline;
wherein the temperature of the refrigerant in the second pipeline is lower than that of the refrigerant in the first pipeline; and, a step of, in the first embodiment,
the apparatus for controlling a refrigerant circulation system as claimed in claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111217435.8A CN113945029B (en) | 2021-10-19 | 2021-10-19 | Method and device for controlling refrigerant circulation system and refrigerant circulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111217435.8A CN113945029B (en) | 2021-10-19 | 2021-10-19 | Method and device for controlling refrigerant circulation system and refrigerant circulation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113945029A CN113945029A (en) | 2022-01-18 |
| CN113945029B true CN113945029B (en) | 2023-04-25 |
Family
ID=79331416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111217435.8A Active CN113945029B (en) | 2021-10-19 | 2021-10-19 | Method and device for controlling refrigerant circulation system and refrigerant circulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113945029B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201122142D0 (en) * | 2011-12-21 | 2012-02-01 | Venus Systems Ltd | Centrifugal compressors |
| EP2626569A1 (en) * | 2012-02-09 | 2013-08-14 | Siemens Aktiengesellschaft | Method for reducing pumps in a compressor |
| JP6533366B2 (en) * | 2013-03-15 | 2019-06-19 | ダイキン アプライド アメリカズ インコーポレィティッド | Refrigerating apparatus and control device for refrigerating machine |
| CN105571181B (en) * | 2016-01-12 | 2017-11-28 | 珠海格力电器股份有限公司 | Variable-frequency centrifugal water chilling unit and control and adjustment method thereof |
| US10113553B2 (en) * | 2016-01-12 | 2018-10-30 | Daikin Applied Americas Inc. | Centrifugal compressor with hot gas injection |
| CN108131871B (en) * | 2017-12-01 | 2020-09-04 | 重庆美的通用制冷设备有限公司 | Variable frequency centrifuge and control method of hot gas bypass valve therein |
| CN109682106B (en) * | 2019-02-12 | 2024-01-23 | 珠海格力电器股份有限公司 | Refrigerant circulation system for slowing down surge of compressor, control method thereof and air conditioner |
| CN111120360A (en) * | 2019-12-22 | 2020-05-08 | 云南瑞斯德机械有限公司 | Structure and method for reducing surge phenomenon of centrifugal compressor and automatically adjusting flow |
| CN112728798B (en) * | 2021-02-05 | 2022-06-17 | 青岛海信日立空调系统有限公司 | Centrifugal compressor system and machine head adding control method thereof |
-
2021
- 2021-10-19 CN CN202111217435.8A patent/CN113945029B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113945029A (en) | 2022-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100443824C (en) | Oil return control in refrigerant system | |
| CN104633867A (en) | Combined computer-room air conditioning system and control method thereof | |
| CN113959106B (en) | Method and device for controlling refrigerant circulation system and refrigerant circulation system | |
| CN113959131B (en) | Method and device for controlling water chilling unit and water chilling unit | |
| CN113945021B (en) | Method and device for controlling start and stop of water chilling unit and water chilling unit | |
| CN115542960A (en) | Method and device for regulating temperature of incubator, incubator and storage medium | |
| CN104613667A (en) | Combined air-conditioning system as well as control method thereof | |
| CN113945029B (en) | Method and device for controlling refrigerant circulation system and refrigerant circulation system | |
| CN114198825A (en) | Control method and device for single cooling of chilled water inter-row air conditioner and inter-row air conditioner | |
| CN210292409U (en) | One drags many liquid cooling machines | |
| CN113959111B (en) | Heat pump system and method and device for controlling heat pump system | |
| CN113639491B (en) | Method and device for defrosting heat pump equipment and hot water unit | |
| CN114198921B (en) | Method and device for controlling refrigerant circulation system and refrigerant circulation system | |
| CN113847762B (en) | Method and device for controlling refrigeration equipment and refrigeration equipment | |
| CN113959130B (en) | Method and device for controlling water chilling unit and water chilling unit | |
| CN111854203B (en) | Refrigerator equipment, refrigerating system and control method of refrigerating system | |
| CN113654139A (en) | Cold and hot source heat pump integrated system and method and device for controlling same | |
| CN114198920B (en) | Method and device for controlling refrigerant circulation system and refrigerant circulation system | |
| CN116499158A (en) | Method and device for controlling heat pump unit, heat pump unit and storage medium | |
| CN111854206B (en) | Refrigerator equipment, refrigerating system and control method of refrigerating system | |
| CN118408304A (en) | Method and device for controlling heat pump unit, heat pump unit and storage medium | |
| CN215951815U (en) | Heat pump system and air conditioning equipment | |
| CN210951981U (en) | Heat exchange system and heat exchanger | |
| CN117804031A (en) | Method and device for controlling a temperature control system, temperature control system and storage medium | |
| CN117663556A (en) | Method and device for controlling magnetic levitation system and magnetic levitation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |