CN113959077B - Control method and device for refrigeration equipment, refrigeration equipment and storage medium - Google Patents
Control method and device for refrigeration equipment, refrigeration equipment and storage medium Download PDFInfo
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- CN113959077B CN113959077B CN202111089399.1A CN202111089399A CN113959077B CN 113959077 B CN113959077 B CN 113959077B CN 202111089399 A CN202111089399 A CN 202111089399A CN 113959077 B CN113959077 B CN 113959077B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The application relates to the technical field of refrigeration equipment and discloses a control method for refrigeration equipment, which comprises the steps of obtaining water temperature information of chilled water exchanging heat with an evaporator; according to the water temperature information, load information and an energy coefficient of the compressor are determined; determining a first load coefficient corresponding to the current rotation speed of the compressor according to the rotation speed of the compressor and the load information; and adjusting the current rotating speed of the compressor according to the energy coefficient and the first load coefficient so as to obtain the target rotating speed of the compressor. The method can improve the stability of water temperature control of the refrigeration equipment. The application also discloses a control device for the refrigeration equipment, the refrigeration equipment and a storage medium.
Description
Technical Field
The present disclosure relates to the technical field of refrigeration devices, and for example, to a control method and apparatus for a refrigeration device, and a storage medium.
Background
At present, water cooling equipment belongs to refrigeration equipment and is quite commonly used in building air conditioners. Water chiller units are typically configured with either a gas suspension compressor or a gas-liquid hybrid compressor. Taking an air suspension compressor as an example, the air suspension compressor is provided with an air suspension bearing, and belongs to power equipment for supporting a rotor to operate by utilizing pressure generated by gas between the bearing and the rotor. In the running process of the refrigeration equipment, the water temperature value of the chilled water needs to be monitored in real time, and the stability of the water temperature value of the chilled water is kept by adjusting various parameters of the refrigeration equipment.
In order to maintain the stability of the chilled water temperature, the existing refrigeration equipment generally adopts a mode of adjusting the rotation speed of a gas suspension compressor or a gas-liquid mixed compressor. However, during operation of the refrigeration equipment, a surge may occur in a gas-suspension or gas-liquid hybrid compressor, and the operational reliability of the compressor is significantly reduced after the surge occurs, which has a relatively adverse effect on the water temperature stability of chilled water.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
the traditional refrigeration equipment has the defect of unstable water temperature control.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a control method and device for refrigeration equipment, the refrigeration equipment and a medium, so that the stability of water temperature control of the refrigeration equipment is improved.
In some embodiments, the method includes obtaining water temperature information of chilled water heat exchanged with an evaporator; according to the water temperature information, load information and an energy coefficient of the compressor are determined; determining a first load coefficient corresponding to the current rotation speed of the compressor according to the rotation speed of the compressor and the load information; and adjusting the current rotating speed of the compressor according to the energy coefficient and the first load coefficient so as to obtain the target rotating speed of the compressor.
In some embodiments, the apparatus comprises a processor and a memory storing program instructions, the processor being configured to perform a control method for a refrigeration appliance as described above when the program instructions are executed.
In some embodiments, the centrifugal refrigeration apparatus includes a control device for a refrigeration apparatus as described above.
In some embodiments, the storage medium stores program instructions that, when executed, perform a control method for a refrigeration appliance as described above.
The control method and device for the refrigeration equipment, the refrigeration equipment and the medium provided by the embodiment of the disclosure can realize the following technical effects:
the centrifugal refrigeration equipment determines load information and energy coefficient of the compressor according to water temperature information of chilled water exchanging heat with the evaporator, and then determines a first load coefficient corresponding to the current rotation speed of the compressor according to the rotation speed and the load information of the compressor, so that load-adding and load-reducing components of the rotation speed of the compressor are accurately obtained, and then the current rotation speed of the compressor is adjusted according to the first load coefficient and the energy coefficient, so that the refrigeration equipment can accurately adjust the rotation speed of the compressor according to the water temperature information of the chilled water, and further stability of water temperature control of the refrigeration equipment is improved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example 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 system schematic diagram of a centrifugal refrigeration apparatus provided by an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a control method for a refrigeration appliance provided in an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of another control method for a refrigeration appliance provided by an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another control method for a refrigeration appliance provided by an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another control method for a refrigeration appliance provided by an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of another control method for a refrigeration appliance provided by an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of another control method for a refrigeration appliance provided by an embodiment of the present disclosure;
FIG. 8 is a schematic diagram of another control method for a refrigeration appliance provided by an embodiment of the present disclosure;
FIG. 9 is a graph of temperature information of chilled water as a function of energy coefficient provided by an embodiment of the present disclosure;
FIG. 10 is a schematic diagram of a control device for a refrigeration appliance provided in an embodiment of the present disclosure;
fig. 11 is a schematic view of another control device for a refrigeration appliance provided by an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
Referring to fig. 1, an embodiment of the present disclosure provides a schematic system diagram of a centrifugal refrigeration apparatus, which includes a refrigerant circulation circuit, an air supply system, and a control assembly. The refrigerant circulation circuit includes a compressor 10, an evaporator 20, a throttling element, and a condenser 40, which are sequentially connected through pipes. The gas supply system includes a gas supply tank 30. The air supply tank 30 is provided in communication with the compressor 10 and the evaporator 20. The control assembly may be used to perform the control method of the refrigeration appliance described below. The compressor 10 may be a gas suspension compressor provided with a gas suspension bearing, or may be a gas-liquid hybrid compressor.
As shown in connection with fig. 2, an embodiment of the present disclosure provides a control method for a refrigeration apparatus, including:
s01, the centrifugal refrigeration equipment acquires water temperature information of chilled water exchanging heat with the evaporator.
S02, the centrifugal refrigeration equipment determines load information and energy coefficients of the compressor according to the water temperature information.
S03, the centrifugal refrigeration equipment determines a first load coefficient corresponding to the current rotation speed of the compressor according to the rotation speed of the compressor and the load information.
S04, the centrifugal refrigeration equipment adjusts the current rotating speed of the compressor according to the energy coefficient and the first load coefficient so as to obtain the target rotating speed of the compressor.
According to the control method for the refrigeration equipment, the centrifugal refrigeration equipment determines the load information and the energy coefficient of the compressor according to the water temperature information of the chilled water exchanging heat with the evaporator, and then determines the first load coefficient corresponding to the current rotating speed of the compressor according to the rotating speed and the load information of the compressor, so that the load adding and subtracting component of the rotating speed of the compressor can be accurately obtained, and then the current rotating speed of the compressor is adjusted according to the first load coefficient and the energy coefficient, so that the refrigeration equipment can accurately adjust the rotating speed of the compressor according to the water temperature information of the chilled water, and further the stability of water temperature control of the refrigeration equipment is improved.
It will be appreciated that the temperature information of the chilled water heat exchanged with the evaporator may be obtained by providing a temperature sensor at the chilled water outlet of the evaporator 10, and detecting the temperature information of the chilled water by the temperature sensor.
As shown in connection with fig. 3, an embodiment of the present disclosure further provides a control method for a refrigeration apparatus, including:
s11, the centrifugal refrigeration equipment acquires water temperature information of chilled water exchanging heat with the evaporator.
S12, the centrifugal refrigeration equipment determines load information and energy coefficients of the compressor according to the water temperature information.
S13, the centrifugal refrigeration equipment acquires surge information of the compressor.
S14, the centrifugal refrigeration equipment determines a first load coefficient corresponding to the current rotation speed of the compressor according to the matching condition of the rotation speed of the compressor and the surge information and the load information.
And S15, the centrifugal refrigeration equipment adjusts the current rotating speed of the compressor according to the energy coefficient and the first load coefficient so as to obtain the target rotating speed of the compressor.
By adopting the control method for the refrigeration equipment provided by the embodiment of the disclosure, the refrigeration equipment belongs to a centrifugal unit, and surge can occur in the operation process of a compressor of the centrifugal unit. Because the running stability of the compressor is reduced after the compressor surges, whether the compressor surges or not needs to be judged according to the matching condition of the rotating speed of the compressor and surge information, and then a first load coefficient corresponding to the current rotating speed of the compressor is determined according to the matching condition of the rotating speed and the surge information and load information. Therefore, on the basis of adjusting the rotating speed of the compressor according to the water temperature information of the chilled water, the running stability of the compressor is also brought into the factor of adjusting the rotating speed of the compressor, and the stability of water temperature control of the refrigeration equipment is further improved.
As shown in fig. 4, the surge information includes a surge section corresponding to the surge speed. According to the matching condition of the rotating speed of the compressor and the surge information and the load information, determining a first load coefficient corresponding to the current rotating speed of the compressor comprises the following steps:
s21, the centrifugal refrigeration equipment determines the first coefficient as a first load coefficient under the condition that the load information indicates that the compressor is in a loading state and the current rotating speed of the compressor is located in a surge interval.
S22, the centrifugal refrigeration equipment determines the second coefficient as the first load coefficient under the condition that the load information indicates that the compressor is in a loading state and the current rotating speed of the compressor is located outside the surge interval.
Wherein the first coefficient is greater than the second coefficient.
Therefore, when the compressor is in a loading state according to load information, whether the current rotating speed of the compressor is located in a surge interval is judged, and when the current rotating speed is located in the surge interval, the current rotating speed of the compressor in the loading state is gradually increased, and surging cannot necessarily occur in the process of gradually increasing the current rotating speed, so that the compressor needs to be rapidly loaded and separated from the surge interval, and the compressor can be rapidly separated from the surge interval by setting a first coefficient larger than a second coefficient, so that the running reliability of the compressor is rapidly improved.
Optionally, the first coefficient is greater than or equal to 0.1 and the first coefficient is less than or equal to 10. The second coefficient is greater than or equal to 0.1 and the second coefficient is less than or equal to 10.
Referring to fig. 5, the surge information includes a surge section corresponding to a surge speed of the compressor, and the determining a first load coefficient corresponding to a current rotation speed of the compressor according to a matching condition of the rotation speed of the compressor and the surge information and the load information includes:
s31, the centrifugal refrigeration equipment determines the third coefficient as the first load coefficient under the condition that the load information indicates that the compressor is in a load shedding state and the current rotating speed of the compressor is located in a surge interval.
S32, under the condition that the load information indicates that the compressor is in a load shedding state and the current rotating speed of the compressor is located outside a surge interval, the centrifugal refrigeration equipment determines that the fourth coefficient is the first load coefficient.
Wherein the third coefficient is smaller than the fourth coefficient.
Optionally, the third coefficient is greater than or equal to 0.1 and the third coefficient is less than or equal to 10. The fourth coefficient is greater than or equal to 0.1 and the fourth coefficient is less than or equal to 10.
In this way, when the compressor is in the load shedding state according to the load information, whether the current rotating speed of the compressor is located in the surge region is judged, when the current rotating speed is located in the surge region, the current rotating speed of the compressor in the load shedding state is gradually reduced, if the load shedding is fast, the current rotating speed of the compressor after the load shedding is likely to be close to or even equal to the surge speed, so that the compressor needs to be slowly subjected to load shedding and separated from the surge region, and the compressor can be slowly separated from the surge region by setting a third coefficient to be larger than a fourth coefficient, so that the running reliability of the compressor is fast improved.
Optionally, as shown in connection with fig. 6, determining load information of the compressor according to the water temperature information includes:
s41, determining that the load information is in a loading state by the centrifugal refrigeration equipment under the condition that the water temperature information is larger than the preset water temperature and the energy coefficient corresponding to the water temperature information is located in the linear loading area.
S42, determining that the load information is in a load shedding state by the centrifugal refrigeration equipment under the condition that the current water temperature information is smaller than or equal to the preset water temperature and the energy coefficient corresponding to the water temperature information is located in the linear load shedding area.
In this way, the water temperature information of the chilled water and the energy coefficient have a functional relationship, and the positive and negative of the energy coefficient can reflect the load information of the compressor, so the load information of the compressor can be determined according to the relationship between the water temperature information and the preset water temperature information and the corresponding relationship between the energy coefficient and the linear loading area/linear unloading area.
Alternatively, as shown in connection with fig. 9, the temperature information of chilled water as a function of energy coefficient is as follows:
wherein K is 0 The energy coefficient is expressed in%. T (T) c Water temperature information is expressed in degrees celsius. T (T) c The energy coefficient corresponding to less than or equal to-D is positioned in the rapid unloading area, -D<T c The energy coefficient corresponding to less than or equal to-C is positioned in the linear unloading area, and A is less than or equal to T c <B is positioned in a linear loading area, T c And the energy coefficient corresponding to the energy coefficient not less than B is positioned in the rapid loading area. -C<T c <The energy coefficient corresponding to 0 is positioned in the negative dead zone, 0<T c <The energy coefficient corresponding to a is located in the positive dead zone. Note that A, B, C, D is a positive number, and-D represents the water temperature boundary point of the rapid unloading area and the linear unloading area, and B represents the water temperature boundary point of the linear loading area and the rapid loading area. A. The value of B, C, D is determined by the type of compressor and other factors.
According to the functional relation, when the water temperature information is in the positive dead zone or the negative dead zone, the energy coefficient is zero, and the current rotation speed of the compressor is kept unchanged. And under the condition that the water temperature information is positioned in an area outside the positive dead zone or the negative dead zone, determining the energy coefficient and the loading state or the unloading state of the compressor according to the water temperature information.
In practical application, T c Representing the current water temperature information, T s Represents a preset water temperature, K represents a first load coefficient, K 1 、K 2 、K 3 、K 4 Representing a first coefficient, a second coefficient, a third coefficient and a fourth coefficient, respectively. v c Represents the surge speed, M represents a preset surge bias for representing the closeness of the rotational speed of the compressor to the surge speed, (0, v) c +M]Indicating surgeVelocity v c A corresponding surge section.
When T is c ≥T s And 0 is<v≤v c At +m, then k=k 1 ；
When T is c ≥T s And v>v c At +m, then k=k 2 ；
When T is c <T s And 0 is<v≤v c At +m, then k=k 3 ；
When T is c <T s And v>v c At +m, then k=k 4 ；
Of which, 10>K 1 >K 2 >0.1，10>K 4 >K 3 >0.1。
As shown in connection with fig. 7, an embodiment of the present disclosure further provides a control method for a refrigeration apparatus, including:
s51, the centrifugal refrigeration equipment acquires water temperature information of chilled water exchanging heat with the evaporator.
S52, the centrifugal refrigeration equipment determines load information and energy coefficients of the compressor according to the water temperature information.
And S53, the centrifugal refrigeration equipment determines a first load coefficient corresponding to the current rotation speed of the compressor according to the rotation speed of the compressor and the load information.
S54, the centrifugal refrigeration equipment multiplies the energy coefficient and the first load coefficient to determine a target load coefficient.
S55, the centrifugal refrigeration equipment multiplies the target load coefficient by the highest rotating speed of the compressor to determine a target load component.
And S56, the centrifugal refrigeration equipment calculates the target load component and the current rotating speed, and determines the new target rotating speed of the compressor.
According to the control method for the refrigeration equipment, the centrifugal water cooling sound can determine the first load coefficient corresponding to the current rotation speed according to the rotation speed and the load information of the compressor, then the energy coefficient and the first load coefficient are multiplied to determine the target load coefficient, then the target load coefficient and the highest rotation speed are multiplied to determine the target load component. The method can rapidly and accurately determine the target rotating speed, can rapidly stabilize the temperature of the chilled water, and improves the efficiency of adjusting the rotating speed of the compressor.
As shown in conjunction with fig. 8, an embodiment of the present disclosure further provides a control method for a refrigeration apparatus, including:
s61, the centrifugal refrigeration equipment acquires water temperature information of chilled water exchanging heat with the evaporator.
S62, the centrifugal refrigeration equipment determines load information and energy coefficients of the compressor according to the water temperature information.
And S63, the centrifugal refrigeration equipment determines a first load coefficient corresponding to the current rotation speed of the compressor according to the rotation speed of the compressor and the load information.
S64, the centrifugal refrigeration equipment multiplies the energy coefficient and the first load coefficient to determine a target load coefficient.
S65, the centrifugal refrigeration equipment multiplies the target load coefficient by the highest rotating speed of the compressor to determine a target load component.
S66, the centrifugal refrigeration equipment acquires the change rate of the water temperature of the chilled water exchanging heat with the evaporator.
S67, when the change rate of the centrifugal refrigeration equipment is larger than the preset change rate, the second load coefficient is obtained according to the change rate, and the third load coefficient is determined according to the product of the second load coefficient and the absolute value of the energy coefficient.
And S68, the centrifugal refrigeration equipment multiplies the sum of the third load coefficient and the target load coefficient by the highest rotating speed to determine a new target load component.
And S69, adding the new target load component and the current rotating speed by the centrifugal refrigeration equipment to determine the new target rotating speed of the compressor.
By adopting the control method for the refrigeration equipment provided by the embodiment of the disclosure, whether the water temperature information of the chilled water is stable or not can be determined through the change rate of the water temperature, therefore, on the basis of determining the target load component, the second load coefficient can be determined according to the change rate of the water temperature of the chilled water, the third load coefficient is determined according to the absolute value of the second load coefficient and the energy coefficient, and the product is formed according to the highest rotating speed and the sum value of the third load coefficient and the target load coefficient, so that the new target load component is determined. The method can give consideration to the water temperature information of the chilled water, the running stability of the compressor and the water temperature lifting trend of the chilled water, and further improve the running reliability of the compressor rapidly.
Optionally, obtaining the second load factor according to the rate of change includes:
and multiplying the change rate by the weighting coefficient to determine a second load coefficient. Wherein the weighting coefficients may be determined based on factors such as the type of compressor. As an example, the weighting factor may have a value in the range of [0.1,5].
In practical application, the calculation formula of the target rotation speed is as follows:
wherein K is 0 Represents an energy coefficient, K represents a first load coefficient, deltat represents duration information of a preset time period, deltat c Indicating the amount of change in the water temperature within the preset time period of Δt. r represents the target rotation speed of the compressor, r c Indicating the current rotation speed of the compressor, r h Indicating the highest rotational speed of the compressor.
As shown in conjunction with fig. 10, an embodiment of the present disclosure provides a control apparatus for a refrigeration device, including an acquisition module 201, a first determination module 202, a second determination module 203, and an execution module 204. The acquisition module 201 is configured to acquire water temperature information of chilled water exchanging heat with the evaporator; the first determination module 202 is configured to determine load information and an energy coefficient of the compressor according to the water temperature information; the second determining module 203 is configured to determine a first load factor corresponding to a current rotational speed of the compressor according to the rotational speed of the compressor and the load information; the execution module 204 is configured to adjust a current rotational speed of the compressor based on the energy coefficient and the first load coefficient to obtain a target rotational speed of the compressor.
By adopting the control device for the refrigeration equipment, which is provided by the embodiment of the disclosure, the stability of water temperature control of the refrigeration equipment is improved.
As shown in connection with fig. 11, an embodiment of the present disclosure provides a control apparatus for a refrigeration appliance 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 control method for the refrigeration appliance 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 functional applications and data processing by running program instructions/modules stored in the memory 101, i.e., implements the control method for the refrigeration appliance of 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 embodiment of the disclosure provides a centrifugal refrigeration device, which comprises the control device for the refrigeration device.
Embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described control method for a refrigeration appliance.
The disclosed embodiments provide a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the above-described control method for a refrigeration appliance.
The computer readable storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (9)
1. A control method for a refrigeration appliance, comprising:
acquiring water temperature information of chilled water exchanging heat with an evaporator;
according to the water temperature information, load information and energy coefficients of the compressor are determined;
determining a first load coefficient corresponding to the current rotation speed of the compressor according to the rotation speed of the compressor and the load information;
according to the energy coefficient and the first load coefficient, adjusting the current rotating speed of the compressor to obtain the target rotating speed of the compressor;
the determining the load information of the compressor according to the water temperature information comprises the following steps:
determining that the load information is in a loading state under the condition that the water temperature information is larger than a preset water temperature and an energy coefficient corresponding to the water temperature information is located in a linear loading area;
determining that the load information is in a load shedding state under the condition that the water temperature information is smaller than or equal to a preset water temperature and an energy coefficient corresponding to the water temperature information is located in a linear load shedding area;
the water temperature information of chilled water is as follows as a function of energy coefficient:
wherein K is 0 Represents the energy coefficient, in units of T c Represents water temperature information, the unit is DEG C A, B, C,D is positive number, D represents the water temperature demarcation point of the quick unloading area and the linear unloading area, and B represents the water temperature demarcation point of the linear loading area and the quick loading area;
T c the energy coefficient corresponding to less than or equal to-D is positioned in the rapid unloading area, -D<T c The energy coefficient corresponding to less than or equal to-C is positioned in the linear unloading area, and A is less than or equal to T c <B is positioned in a linear loading area, T c The energy coefficient corresponding to the energy coefficient not less than B is positioned in the quick loading area;
-C<T c <the energy coefficient corresponding to 0 is positioned in the negative dead zone, 0<T c <The energy coefficient corresponding to a is located in the positive dead zone.
2. The method of claim 1, wherein determining a first load factor corresponding to a current rotational speed of the compressor based on the rotational speed of the compressor and the load information comprises:
acquiring surge information of the compressor;
and determining a first load coefficient corresponding to the current rotating speed of the compressor according to the matching condition of the rotating speed of the compressor and the surge information and the load information.
3. The method of claim 2, wherein the surge information includes a surge interval corresponding to a surge speed, and wherein the determining a first load factor corresponding to a current rotational speed of the compressor based on the matching of the rotational speed of the compressor and the surge information and the load information comprises:
determining a first coefficient as the first load coefficient under the condition that the load information indicates that the compressor is in a loading state and the current rotating speed of the compressor is located in the surge interval;
determining a second coefficient as the first load coefficient when the load information indicates that the compressor is in a loading state and the current rotating speed of the compressor is outside the surge interval;
wherein the first coefficient is greater than the second coefficient.
4. The method of claim 2, wherein the surge information includes a surge interval corresponding to a surge speed of the compressor, and wherein the determining a first load factor corresponding to a current rotational speed of the compressor based on a matching of the rotational speed of the compressor to the surge information and the load information comprises:
determining a third coefficient as the first load coefficient under the condition that the load information indicates that the compressor is in a load shedding state and the current rotating speed of the compressor is positioned in the surge interval;
determining a fourth coefficient as the first load coefficient when the load information indicates that the compressor is in a load shedding state and the current rotating speed of the compressor is outside the surge interval;
wherein the third coefficient is smaller than the fourth coefficient.
5. The method of any one of claims 1 to 4, wherein said adjusting the current rotational speed of the compressor based on the energy coefficient and the first load coefficient to obtain the target rotational speed of the compressor comprises:
multiplying the energy coefficient by the first load coefficient to determine a target load coefficient;
the target load coefficient is multiplied by the highest rotating speed of the compressor, and a target load component is determined;
and adding the target load component and the current rotating speed to determine a new target rotating speed of the compressor.
6. The method of claim 5, wherein after the determining the target load component, further comprising:
acquiring the change rate of the water temperature of chilled water exchanging heat with the evaporator;
when the change rate is larger than a preset change rate, a second load coefficient is obtained according to the change rate, and a third load coefficient is determined according to the product of the second load coefficient and the absolute value of the energy coefficient;
multiplying the sum of the third load coefficient and the target load coefficient by the highest rotating speed to determine a new target load component;
and determining a new target rotating speed of the compressor according to the sum of the new target load component and the current rotating speed.
7. A control apparatus for a refrigeration appliance comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the control method for a refrigeration appliance of any one of claims 1 to 6 when the program instructions are run.
8. A centrifugal refrigeration apparatus comprising a control device for a refrigeration apparatus as recited in claim 7.
9. A storage medium storing program instructions which, when executed, perform the control method for a refrigeration appliance according to any one of claims 1 to 6.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4282718A (en) * | 1979-09-12 | 1981-08-11 | Borg-Warner Corporation | Evaporator inlet water temperature control system |
| CN101782261B (en) * | 2010-04-23 | 2012-01-11 | 吕红丽 | Nonlinear self-adapting energy-saving control method for heating ventilation air-conditioning system |
| CN106524613A (en) * | 2016-11-14 | 2017-03-22 | 广东美的暖通设备有限公司 | Variable-frequency air-cooled heat pump unit and control method and device thereof |
| CN108444122A (en) * | 2018-02-09 | 2018-08-24 | 珠海格力电器股份有限公司 | Air-conditioning system |
| CN110529991B (en) * | 2019-09-10 | 2020-11-17 | 重庆美的通用制冷设备有限公司 | Control method and system of air conditioner, air conditioner and computer readable storage medium |
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