CN112050429A - Control method and device for fixed-frequency air conditioner and fixed-frequency air conditioner - Google Patents

Control method and device for fixed-frequency air conditioner and fixed-frequency air conditioner Download PDF

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Publication number
CN112050429A
CN112050429A CN201910484803.1A CN201910484803A CN112050429A CN 112050429 A CN112050429 A CN 112050429A CN 201910484803 A CN201910484803 A CN 201910484803A CN 112050429 A CN112050429 A CN 112050429A
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China
Prior art keywords
temperature
compressor
air conditioner
real
exhaust temperature
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CN201910484803.1A
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Chinese (zh)
Inventor
于文文
崔俊
罗荣邦
许文明
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Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Co Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Co Ltd
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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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • 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
    • 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
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits

Abstract

The application relates to a control method and device for a fixed-frequency air conditioner and the fixed-frequency air conditioner, and belongs to the technical field of air conditioners. The method comprises the following steps: obtaining the cold outlet temperature of the condenser; obtaining real-time exhaust temperature according to a preset relation between the cold outlet temperature and the real-time exhaust temperature of the compressor; and controlling the working mode of the compressor according to the relation between the real-time exhaust temperature and the preset exhaust temperature. The control device for the fixed-frequency air conditioner and the fixed-frequency air conditioner are further provided. The beneficial effect of this disclosure: the real-time exhaust temperature of the compressor is obtained through the cold outlet temperature calculation of the condenser, the real-time exhaust temperature is closer to the actual exhaust temperature of the compressor, the working mode of the compressor is controlled according to the real-time exhaust temperature obtained through calculation to play a role in protecting the compressor, and the protection performance of the fixed-frequency air conditioner is improved.

Description

Control method and device for fixed-frequency air conditioner and fixed-frequency air conditioner
Technical Field
The application relates to the technical field of air conditioners, in particular to a control method and device for a fixed-frequency air conditioner and the fixed-frequency air conditioner.
Background
At present, the fixed-frequency air conditioner generally adopts devices such as an indoor environment temperature sensor, a coil pipe sensor and a compressor temperature protector to detect the temperature of a specific position of the fixed-frequency air conditioner, and then protects the operation of the fixed-frequency air conditioner. Compared with a variable frequency air conditioner, the fixed frequency air conditioner has fewer protection devices. A thermosensitive temperature protector is connected inside or outside a compressor of the fixed-frequency air conditioner, the discharge temperature of the compressor is obtained according to the thermosensitive temperature protector, and then the compressor is protected according to the discharge temperature.
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: after the air conditioner is installed, oil stains or dust and the like are attached to the surface of the protector element along with the lapse of service time, so that the heat transfer coefficient is increased, the difference between the detected temperature and the actual temperature of the protector is increased, and the protector cannot jump off the compressor in time.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a control method and a control device for a fixed-frequency air conditioner and the fixed-frequency air conditioner, which are used for solving the technical problem that the protector cannot timely trip off a protection compressor due to the fact that the heat transfer coefficient of a protector of an air conditioner compressor is increased, so that the difference between the temperature detected by the protector and the actual temperature is increased.
In some embodiments, the method comprises:
obtaining the cold outlet temperature of the condenser;
obtaining real-time exhaust temperature according to a preset relation between the cold outlet temperature and the real-time exhaust temperature of the compressor; and
and controlling the working mode of the compressor according to the relation between the real-time exhaust temperature and the preset exhaust temperature.
In some embodiments, the apparatus comprises:
the acquisition module is configured to acquire the cold outlet temperature of the condenser and acquire the real-time exhaust temperature according to the preset relation between the cold outlet temperature and the real-time exhaust temperature of the compressor; and
and the control module is configured to control the working mode of the compressor according to the relation between the real-time exhaust temperature and the preset exhaust temperature.
In some embodiments, the fixed-frequency air conditioner comprises the control device for the fixed-frequency air conditioner.
The control method and the control device for the fixed-frequency air conditioner and the fixed-frequency air conditioner provided by the embodiment of the disclosure can realize the following technical effects:
the real-time exhaust temperature of the compressor is obtained through the cold outlet temperature calculation of the condenser, the exhaust temperature of the compressor does not need to be detected by a compressor protector with the heat transfer coefficient becoming larger, and the real-time exhaust temperature is closer to the actual exhaust temperature of the compressor. The working mode of the compressor is controlled according to the real-time exhaust temperature obtained through calculation so as to play a role in protecting the compressor, and the problem that the protector cannot jump off the compressor in time to protect the compressor due to the fact that the heat transfer coefficient of the protector of the air conditioner compressor is increased and the difference between the detected temperature and the actual temperature is increased does not exist, and the protection performance of the fixed-frequency air conditioner is improved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
fig. 1 is a schematic flowchart of a control method for a fixed-frequency air conditioner according to an embodiment of the disclosure;
fig. 2 is a schematic flowchart of a control method for a fixed-frequency air conditioner according to an embodiment of the disclosure;
fig. 3 is a schematic flowchart of a control method for a fixed-frequency air conditioner according to an embodiment of the disclosure;
fig. 4 is a schematic device diagram of a control device for a fixed-frequency air conditioner according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an electronic device provided in an embodiment of the present disclosure.
Reference numerals:
40: an acquisition module; 41: a control module; 50: a processor; 51: a memory; 52: a communication interface; 53: a bus.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The embodiment of the present disclosure provides a control method for a fixed-frequency air conditioner, as shown in fig. 1, including the following steps:
s101: the cold exit temperature of the condenser is obtained.
Optionally, the cooling temperature is detected by a temperature sensor disposed at the liquid outlet of the condenser. The cold outlet temperature is the temperature at the outlet of the condenser.
S102: and obtaining the real-time exhaust temperature according to the preset relation between the cold outlet temperature and the real-time exhaust temperature of the compressor.
Optionally, the preset relationship is:
Td＝kc×Tc+ΔTc
wherein, TdFor real-time exhaust temperature, TcTo cool the temperature, kcIs the proportional coefficient of cold-leaving temperature, Δ TcIs a cold-out temperature compensation constant.
Optionally, the cold-out temperature proportionality coefficient k in the preset relation is obtained by performing system test on the fixed-frequency air conditionercAnd cold exit temperature compensation constant Δ Tc. For example, when the surfaces of the compressor and the compressor protector element are clean and the refrigerant is sufficient, the first discharge temperature T of the compressor at different times is obtained by the compressor protector elementd1And a second exhaust temperature Td2And T isd1Is not equal to Td2And a first exhaust temperature T is obtained by a temperature sensor arranged at a liquid outlet of the condenserd1First cold outlet temperature T of the corresponding condenserc1And a second exhaust temperature Td2Second cold exit temperature T of the corresponding condenserc2. Will Td1、Td2、Tc1And Tc2Substituting into a preset relation to obtain a cold-outlet temperature proportional coefficient kcAnd cold exit temperature compensation constant Δ Tc. The obtained cold-out temperature proportionality coefficient kcAnd cold exit temperature compensation constant Δ TcSubstituted into a predetermined relationship for the discharge temperature T of the compressordAnd (4) calculating.
Optionally, the cold-out temperature proportionality coefficient k in the preset relationcAnd cold exit temperature compensation constant Δ TcRespectively, the average cold-out temperature proportionality coefficient obtained by carrying out a plurality of times of system tests on the fixed-frequency air conditioner
Figure BDA0002085048250000041
And average cold exit temperature compensation constant
Figure BDA0002085048250000042
Namely:
Figure BDA0002085048250000043
Figure BDA0002085048250000044
wherein k iscnThe proportional coefficient of cold discharge temperature, delta T, obtained by the system test of the fixed-frequency air conditioner for the nth timecnThe constant is the cold-out temperature compensation constant obtained by carrying out the system test on the constant-frequency air conditioner for the nth time, wherein n is the number of times of carrying out the system test on the constant-frequency air conditioner, and n is more than or equal to 2.
The proportional coefficient k of the cold outlet temperature in the preset relationcSet as the proportional coefficient of the average cold-out temperature
Figure BDA0002085048250000045
Will cool off the temperature compensation constant Δ TcSet as the average cold exit temperature compensation constant
Figure BDA0002085048250000046
Can reduce the error of single system test and improve the proportional coefficient k of cold outlet temperaturecAnd cold exit temperature compensation constant Δ TcThe value taking precision is improved, and the accuracy of real-time exhaust temperature calculation of the compressor is improved.
S103: and controlling the working mode of the compressor according to the relation between the real-time exhaust temperature and the preset exhaust temperature.
Optionally, the operating modes of the compressor include a shutdown mode and an operating mode. According to the relation between the real-time exhaust temperature and the preset exhaust temperature, the compressor is controlled to be in a stop mode or an operation mode, the compressor is prevented from running in an overload mode, and the compressor can be protected.
In the embodiment, the real-time exhaust temperature of the compressor is obtained through the cold outlet temperature calculation of the condenser, the exhaust temperature of the compressor is not required to be detected by the compressor protector with the increased heat transfer coefficient, and the real-time exhaust temperature is closer to the actual exhaust temperature of the compressor. The working mode of the compressor is controlled according to the real-time exhaust temperature obtained through calculation so as to play a role in protecting the compressor, and the protection performance of the fixed-frequency air conditioner is improved.
In some embodiments, as shown in fig. 2, there is provided a control method for a fixed-frequency air conditioner, including the steps of:
s201: the cold exit temperature of the condenser is obtained.
S202: and obtaining the real-time exhaust temperature according to the preset relation between the cold outlet temperature and the real-time exhaust temperature of the compressor.
S203: and controlling the working mode of the compressor according to the relation between the real-time exhaust temperature and the preset exhaust temperature.
S204: and obtaining the actual temperature difference and the theoretical temperature difference between the indoor environment temperature and the indoor coil temperature.
Optionally, the indoor ambient temperature is detected by an indoor temperature sensor of the fixed-frequency air conditioner, and the indoor coil temperature is obtained by a coil temperature sensor arranged on the coil of the indoor heat exchanger. And calculating to obtain the actual temperature difference value between the indoor environment temperature and the indoor coil temperature.
S205: and controlling the working mode of the compressor according to the relation between the actual temperature difference and the theoretical temperature difference.
And judging the refrigerant condition of the air conditioner according to the relation between the actual temperature difference and the theoretical temperature difference. Therefore, according to the relation between the actual temperature difference value and the theoretical temperature difference value, the compressor is controlled to be in the stop mode under the condition that the refrigerant is lacked and to be in the running mode under the condition that the refrigerant is normal, and the compressor can be protected.
The real-time exhaust temperature of the compressor is too high, and one factor is refrigerant loss. In this embodiment, on the basis of controlling the working mode of the compressor according to the real-time exhaust temperature of the compressor, the refrigerant condition of the air conditioner is judged according to the relation between the actual temperature difference and the theoretical temperature difference, so as to control the working mode of the compressor, thereby playing a role in double protection for the compressor and improving the protection performance of the fixed-frequency air conditioner.
In some embodiments, as shown in fig. 3, there is provided a control method for a fixed-frequency air conditioner, including the steps of:
s301: the cold exit temperature of the condenser is obtained.
S302: and obtaining the real-time exhaust temperature according to the preset relation between the cold outlet temperature and the real-time exhaust temperature of the compressor.
S303: and controlling the compressor to be in a stop mode under the condition that the real-time exhaust temperature is greater than or equal to the preset exhaust temperature.
When the real-time exhaust temperature is greater than or equal to the preset exhaust temperature, the abnormal operation of the air conditioner is indicated, and the compressor is controlled to stop so as to play a role in protecting the compressor.
Optionally, the compressor is controlled to be in the shutdown mode under the condition that the real-time exhaust temperature is greater than or equal to the preset exhaust temperature and the duration is greater than or equal to the preset duration.
When the real-time exhaust temperature is greater than or equal to the preset exhaust temperature and the duration is greater than or equal to the preset duration, the effectiveness and the accuracy of the state information of the real-time exhaust temperature greater than or equal to the preset exhaust temperature are proved, the compressor is controlled to stop to protect the compressor, meanwhile, the damage to the compressor caused by frequent stop of the compressor is reduced, and the service life of the compressor is further prolonged.
Optionally, the preset time period is 5-50s (seconds), e.g., 5s, 30s, 50 s. The timeliness and effectiveness of the shutdown protection of the compressor are improved.
S304: and obtaining the actual temperature difference value between the indoor environment temperature and the indoor coil temperature.
S305: and obtaining the theoretical temperature difference value according to a preset formula which is met by the set temperature of the air conditioner and the theoretical temperature difference value.
Optionally, the preset formula is:
ΔT2＝kset×Tset-ΔTset
wherein, Delta T2As a theoretical temperature difference, TsetSetting temperature, k, for air-conditioningsetSetting a temperature scaling factor, Δ T, for an air conditionersetA temperature compensation constant is set for the air conditioner.
Optionally, the air conditioner set temperature proportionality coefficient k in the preset formula is obtained by performing system test on the fixed-frequency air conditionersetAnd air conditioner set temperature compensation constant delta Tset. E.g. emptyAdjusting the set temperature Tset1And Tset2And T isset1Is not equal to Tset2When the surface of the compressor is clean and the refrigerant is sufficient, the temperature sensor detects that the air conditioner is at the set temperature Tset1Ambient room temperature T under conditionsin1Temperature T of indoor coilp1And the air conditioner is at the set temperature Tset2Ambient room temperature T under conditionsin2Temperature T of indoor coilp2. Calculating indoor ambient temperature Tin1Temperature T of indoor coilp1Difference value Δ T of21And indoor ambient temperature Tin2Temperature T of indoor coilp2Difference value Δ T of22Will Tset1、Tset2、ΔT21And Δ T22Substituting into a preset formula to obtain the proportional coefficient k of the set temperature of the air conditionersetAnd air conditioner set temperature compensation constant delta Tset. The obtained air conditioner set temperature proportionality coefficient ksetAnd air conditioner set temperature compensation constant delta TsetSubstituted into a predetermined formula for the theoretical temperature difference Δ T2And (4) calculating.
Optionally, the air conditioner setting temperature proportional coefficient k in the preset formulasetAnd air conditioner set temperature compensation constant delta TsetRespectively setting temperature proportionality coefficients for average air conditioner obtained by multiple system tests on fixed-frequency air conditioner
Figure BDA0002085048250000061
And average air conditioner set temperature compensation constant
Figure BDA0002085048250000062
Namely:
Figure BDA0002085048250000063
Figure BDA0002085048250000064
wherein k issetmFor the mth time of constant-frequency air conditioningThe air conditioner setting temperature proportionality coefficient obtained by system test,
Figure BDA0002085048250000065
and setting a temperature compensation constant for the air conditioner obtained by performing system test on the fixed-frequency air conditioner for the mth time, wherein m is the number of times of performing system test on the fixed-frequency air conditioner and is more than or equal to 2.
Setting a temperature proportional coefficient k of an air conditioner in a preset formulasetSetting to average air conditioner set temperature proportionality coefficient
Figure BDA0002085048250000066
Setting air conditioner to temperature compensation constant delta TsetSetting temperature compensation constant to average air conditioner
Figure BDA0002085048250000067
Can reduce the error of single system test and improve the proportional coefficient k of the set temperature of the air conditionersetAnd air conditioner set temperature compensation constant delta TsetAnd the accuracy of the value is further improved, so that the accuracy of the calculation of the theoretical temperature difference value is improved.
S306: at Δ T1≥ΔT2+ C, the compressor is controlled to be in shutdown mode.
Wherein, Delta T1For the actual temperature difference, Δ T2And C is a preset temperature value which is a theoretical temperature difference value.
The relationship between the actual temperature difference and the theoretical temperature difference and the refrigerant condition of the air conditioner is as follows:
ΔT2≤ΔT1<ΔT2+3, indicating that the refrigerant is normal;
ΔT2+3≤ΔT1<ΔT2+5, indicating a refrigerant shortage of 20-30%;
ΔT2+5≤ΔT1<ΔT2+8, indicating a refrigerant shortage of 30-60%;
ΔT1≥ΔT2+8, indicating a refrigerant deficiency of more than 60%.
Alternatively, C is 7.8-8.2 deg.C (Celsius), e.g., 7.8 deg.C, 8 deg.C, 8.2 deg.C. In the case of refrigerant shortage less than 60%And the air conditioner can normally operate. Thus, at Δ T1≥ΔT2And under the condition of +7.8-8.2, the compressor is controlled to stop, so that the effect of protecting the compressor can be achieved, and meanwhile, the damage to the compressor caused by frequent stop of the compressor can be reduced, and the service life of the compressor is further prolonged.
In this embodiment, on the one hand, the working mode of the compressor is controlled according to the real-time exhaust temperature obtained through calculation to play a role in protecting the compressor, and on the other hand, the working mode of the compressor is controlled according to the relation between the actual temperature difference and the theoretical temperature difference to play a role in protecting the compressor, so that the compressor can play a role in double protection, and the protection performance of the fixed-frequency air conditioner is improved.
The embodiment of the present disclosure provides a control device for a fixed-frequency air conditioner, as shown in fig. 4, including:
an obtaining module 40 configured to obtain a cold-out temperature of the condenser, and obtain a real-time exhaust temperature according to a preset relationship between the cold-out temperature and a real-time exhaust temperature of the compressor; and
and the control module 41 is configured to control the working mode of the compressor according to the relation between the real-time exhaust temperature and the preset exhaust temperature.
In some embodiments, the control module 41 is configured to control the compressor to be in the shutdown mode if the real-time discharge temperature is greater than or equal to a preset discharge temperature; or
And controlling the compressor to be in a shutdown mode under the conditions that the real-time exhaust temperature is greater than or equal to the preset exhaust temperature and the duration is greater than or equal to the preset duration.
In some embodiments of the present invention, the,
the obtaining module 41 is further configured to obtain an actual temperature difference and a theoretical temperature difference between the indoor ambient temperature and the indoor coil temperature;
the control module 41 is further configured to control the operating mode of the compressor based on the relationship of the actual temperature difference to the theoretical temperature difference.
In some embodiments, the obtaining module 41 is configured to calculate the theoretical temperature difference according to the following formula:
ΔT2＝kset×Tset-ΔTset
wherein, Delta T2As a theoretical temperature difference, TsetSetting temperature, k, for air-conditioningsetSetting a temperature scaling factor, Δ T, for an air conditionersetA temperature compensation constant is set for the air conditioner.
In some embodiments, the control module 41 is configured to control the temperature at Δ T1≥ΔT2+ C, controlling the compressor to be in a stop mode;
wherein, Delta T1For the actual temperature difference, Δ T2And C is a preset temperature value which is a theoretical temperature difference value.
The embodiment of the disclosure provides a fixed-frequency air conditioner, which comprises the control device for the fixed-frequency air conditioner.
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 fixed-frequency air conditioner.
The disclosed embodiments provide a computer program product comprising a computer program stored on a computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the above-described control method for a fixed-frequency air conditioner.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
An embodiment of the present disclosure provides an electronic device, a structure of which is shown in fig. 5, the electronic device including:
at least one processor (processor)50, one processor 50 being exemplified in fig. 5; and a memory (memory)51, and may further include a Communication Interface (Communication Interface)52 and a bus 53. The processor 50, the communication interface 52 and the memory 51 may communicate with each other via a bus 53. The communication interface 52 may be used for information transfer. The processor 50 may call logic instructions in the memory 51 to perform the control method for the fixed-frequency air conditioner of the above-described embodiment.
In addition, the logic instructions in the memory 51 may be implemented in the form of software functional units and may be stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 51 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 50 executes functional applications and data processing by operating modes of software programs, instructions and modules stored in the memory 51, that is, implements the control method for the fixed-frequency air conditioner in the above-described method embodiment.
The memory 51 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the memory 51 may include a high-speed random access memory, and may also include a nonvolatile memory.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the disclosed embodiments includes the full ambit of the claims, as well as all available equivalents of the claims. As used in this application, although the terms "first," "second," etc. may be used in this application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, unless the meaning of the description changes, so long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first and second elements are both elements, but may not be the same element. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims (13)

1. A control method for a fixed-frequency air conditioner, comprising:
obtaining the cold outlet temperature of the condenser;
obtaining real-time exhaust temperature according to a preset relation between the cold outlet temperature and the real-time exhaust temperature of the compressor; and
and controlling the working mode of the compressor according to the relation between the real-time exhaust temperature and the preset exhaust temperature.
2. The method of claim 1, wherein the predetermined relationship is:
Td＝kc×Tc+ΔTc
wherein, TdFor real-time exhaust temperature, TcTo cool the temperature, kcIs the proportional coefficient of cold-leaving temperature, Δ TcIs a cold-out temperature compensation constant.
3. The method of claim 1, wherein said controlling the operating mode of the compressor based on the relationship between the real-time discharge temperature and a preset discharge temperature comprises:
controlling the compressor to be in a shutdown mode under the condition that the real-time exhaust temperature is greater than or equal to the preset exhaust temperature; or
And controlling the compressor to be in a shutdown mode under the conditions that the real-time exhaust temperature is greater than or equal to the preset exhaust temperature and the duration is greater than or equal to the preset duration.
4. The method of any of claims 1 to 3, further comprising:
obtaining an actual temperature difference value and a theoretical temperature difference value between the indoor environment temperature and the indoor coil temperature;
and controlling the working mode of the compressor according to the relation between the actual temperature difference and the theoretical temperature difference.
5. The method of claim 4, wherein the theoretical temperature difference is calculated according to the following formula:
ΔT2＝kset×Tset-ΔTset
wherein, Delta T2As a theoretical temperature difference, TsetSetting temperature, k, for air-conditioningsetSetting a temperature scaling factor, Δ T, for an air conditionersetA temperature compensation constant is set for the air conditioner.
6. The method of claim 4, wherein said controlling the operating mode of the compressor based on the relationship between the actual temperature difference and the theoretical temperature difference comprises:
at Δ T1≥ΔT2+ C, controlling the compressor to be in a stop mode;
wherein, Delta T1For the actual temperature difference, Δ T2And C is a preset temperature value which is a theoretical temperature difference value.
7. A control apparatus for a fixed frequency air conditioner, comprising:
the acquisition module is configured to acquire the cold outlet temperature of the condenser and acquire the real-time exhaust temperature according to the preset relation between the cold outlet temperature and the real-time exhaust temperature of the compressor; and
and the control module is configured to control the working mode of the compressor according to the relation between the real-time exhaust temperature and the preset exhaust temperature.
8. The apparatus of claim 7, wherein the predetermined relationship is:
Td＝kc×Tc+ΔTc
wherein, TdFor real-time exhaust temperature, TcTo cool the temperature, kcIs the proportional coefficient of cold-leaving temperature, Δ TcIs a cold-out temperature compensation constant.
9. The apparatus of claim 7,
the control module is configured to:
controlling the compressor to be in a shutdown mode under the condition that the real-time exhaust temperature is greater than or equal to the preset exhaust temperature; or
And controlling the compressor to be in a shutdown mode under the conditions that the real-time exhaust temperature is greater than or equal to the preset exhaust temperature and the duration is greater than or equal to the preset duration.
10. The apparatus according to any one of claims 7 to 9,
the acquisition module is further configured to: obtaining an actual temperature difference value and a theoretical temperature difference value between the indoor environment temperature and the indoor coil temperature;
the control module is further configured to: and controlling the working mode of the compressor according to the relation between the actual temperature difference and the theoretical temperature difference.
11. The apparatus of claim 10,
the obtaining module is configured to calculate the theoretical temperature difference value according to the following formula:
ΔT2＝kset×Tset-ΔTset
wherein, Delta T2As a theoretical temperature difference, TsetSetting temperature, k, for air-conditioningsetSetting a temperature scaling factor, Δ T, for an air conditionersetA temperature compensation constant is set for the air conditioner.
12. The apparatus of claim 10,
the control module is configured to: at Δ T1≥ΔT2+ C, controlling the compressor to be in a stop mode;
wherein, Delta T1For the actual temperature difference, Δ T2And C is a preset temperature value which is a theoretical temperature difference value.
13. A constant-frequency air conditioner, characterized by comprising the control device for a constant-frequency air conditioner according to any one of claims 7 to 12.
CN201910484803.1A 2019-06-05 2019-06-05 Control method and device for fixed-frequency air conditioner and fixed-frequency air conditioner Pending CN112050429A (en)

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