CN112050432A - 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 PDFInfo
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- CN112050432A CN112050432A CN201910484881.1A CN201910484881A CN112050432A CN 112050432 A CN112050432 A CN 112050432A CN 201910484881 A CN201910484881 A CN 201910484881A CN 112050432 A CN112050432 A CN 112050432A
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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
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- 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 state of the pressure reducing valve 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 pressure relief valve is controlled to release pressure according to the real-time exhaust temperature obtained through calculation to achieve the effect of protecting the compressor, and the protection performance of the fixed-frequency air conditioner is improved.
Description
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 state of the pressure reducing valve 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 state of the pressure reducing valve 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 pressure relief valve is controlled to relieve the pressure according to the real-time exhaust temperature obtained through calculation so as to protect the compressor, the problem that the protector cannot jump to protect the compressor in time due to the fact that the heat transfer coefficient of the air conditioner compressor protector 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 structural 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 a fixed-frequency air conditioner provided in the embodiment of the present disclosure;
fig. 6 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; 501: a compressor; 502: a four-way valve; 503: a low pressure valve; 504: an indoor unit; 505: a high pressure valve; 506: a one-way valve; 507: a primary capillary tube; 508: an outdoor unit; 509: a gas-liquid separator; 510: a secondary capillary; 511: a pressure reducing valve; 512: an electromagnetic valve; 60: a processor; 61: a memory; 62: a communication interface; 63: 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 disclosure provides a control method for a fixed-frequency air conditioner, which comprises 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
And average cold exit temperature compensation constant
Namely:
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
Will cool off the temperature compensation constant Δ TcSet as the average cold exit temperature compensation constant
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 state of the pressure reducing valve according to the relation between the real-time exhaust temperature and the preset exhaust temperature.
Optionally, the operating state of the pressure reducing valve comprises an open state and a closed state. According to the relation between the real-time exhaust temperature and the preset exhaust temperature, the pressure reducing valve is controlled to be in an opening state or a closing state, pressure relief operation is carried out in time, 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 pressure relief valve is controlled to relieve pressure according to the real-time exhaust temperature obtained through calculation so as to protect 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 state of the pressure reducing valve 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 state of the pressure reducing valve according to the real-time exhaust temperature of the compressor to play a role in protecting 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, play a role in double protection for the compressor, and improve 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 reducing valve to be in an opening state 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 a first 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 first preset duration, the validity and the accuracy of the state information of the real-time exhaust temperature is proved, the pressure reducing valve is controlled to be opened to release pressure to protect the compressor, the accuracy of the pressure reducing valve opening time for reducing pressure is improved, and meanwhile, the influence of frequent opening of the pressure reducing valve on the normal working state of the air conditioner is reduced.
Optionally, the first preset time period is 5-50s (seconds), for example, 5s, 30s, 50 s. The timeliness and effectiveness of opening the pressure relief valve to protect the compressor are improved.
S304: and after the pressure reducing valve is controlled to be in an opening state, under the condition that the real-time exhaust temperature is lower than the preset exhaust temperature, the pressure reducing valve is controlled to be in a closing state after a second preset time.
And when the real-time exhaust temperature is lower than the preset exhaust temperature, indicating that the working state of the compressor is recovered to be normal. In order to further reduce the pressure of the compressor, the working pressure of the compressor is far away from the critical value of overload operation, and the pressure reducing valve is continuously kept in an opening state for pressure relief. And after the second preset time, the pressure reducing valve is closed, so that the compressor operates under the condition that the pressure value is lower than the critical pressure value of overload operation, the compressor can be further protected, and the service life of the compressor is prolonged.
Optionally, the second preset time period is 8s-12s (seconds), for example, 8s, 10s, 12 s. The pressure reducing valve is controlled to further release pressure so as to protect the compressor, and meanwhile, the air conditioner can normally work to perform air conditioning as soon as possible.
S305: and after controlling the pressure reducing valve to be in an open state for a third preset time, 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.
After the pressure reducing valve is opened for a third preset time period for pressure reduction operation, the real-time exhaust temperature is greater than or equal to the preset exhaust temperature, which indicates that the pressure reduction capacity of the pressure reducing valve cannot meet the pressure reduction requirement of the compressor. In order to protect the compressor, the compressor is controlled to stop in time.
Optionally, the third preset time period is 90s-150s (seconds), for example, 90s, 120s, 150 s. The timeliness and effectiveness of the shutdown protection of the compressor are improved.
S306: and obtaining the actual temperature difference value between the indoor environment temperature and the indoor coil temperature.
S307: 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. For example, the air conditioner sets the 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 indoorsAmbient 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
And average air conditioner set temperature compensation constant
Namely:
wherein k issetmThe set temperature proportionality coefficient of the air conditioner obtained by the system test of the fixed-frequency air conditioner for the mth time,
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
Setting air conditioner to temperature compensation constant delta TsetSetting temperature compensation constant to average air conditioner
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.
S308: 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. Under the condition that the refrigerant is less than 60 percent short, 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, according to the real-time exhaust temperature control relief valve that the calculation obtained in time the pressure release operation in order to play the effect of protection compressor, on the other hand, through the mode of operation control compressor of the relation of actual temperature difference and theoretical temperature difference in order to play the effect of protection compressor, can play the effect of multiple protection to the compressor, improved the protective properties of fixed frequency air conditioner.
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 state of the pressure reducing valve 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 pressure reducing valve to be in the open state if the real-time exhaust temperature is greater than or equal to a preset exhaust temperature and the duration is greater than or equal to a first preset duration.
In some embodiments, the control module 41 is further configured to control the pressure reducing valve to be in the closed state after a second preset time period in case that the real-time exhaust temperature is less than the preset exhaust temperature after controlling the pressure reducing valve to be in the open state.
In some embodiments, the control module 41 is further configured to control the compressor to be in the shutdown mode if the real-time discharge temperature is greater than or equal to the preset discharge temperature after controlling the pressure reducing valve to be in the open state for a third preset period of time.
In some embodiments of the present invention, the,
the acquisition module 40 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 the content of the first and second substances,ΔT2as 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.
In some embodiments, a fixed frequency air conditioner is provided, as shown in fig. 5, including a compressor 501, a gas-liquid separator 509, a four-way valve 502, a low pressure valve 503, an indoor unit 504, a high pressure valve 505, a one-way valve 506, a main capillary 507, an outdoor unit 508, a four-way valve 502, and the compressor 501, which are connected in sequence. The fixed-frequency air conditioner further comprises an auxiliary capillary 510, a pressure reducing valve 511 and an electromagnetic valve 512, wherein two ends of the auxiliary capillary 510 are respectively connected with two ends of the one-way valve 506, the pressure reducing valve 511 and the electromagnetic valve 512 are connected to form a pressure reducing pipeline, and two ends of the pressure reducing pipeline are respectively connected with two ends of the main capillary 507. The opening of the pressure reducing valve 511 is controlled by controlling the opening of the solenoid valve 512, and a part of the high-pressure refrigerant flowing through the main capillary 507 is introduced into the pressure reducing pipeline to perform a pressure relief operation, thereby protecting the compressor 501.
Optionally, the fixed-frequency air conditioner further comprises the control device for the fixed-frequency air conditioner.
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. 6, the electronic device including:
at least one processor (processor)60, one processor 60 being exemplified in fig. 6; and a memory (memory)61, and may further include a Communication Interface (Communication Interface)62 and a bus 63. The processor 60, the communication interface 62 and the memory 61 may communicate with each other through a bus 63. Communication interface 62 may be used for information transfer. The processor 60 may call logic instructions in the memory 61 to perform the control method for the fixed-frequency air conditioner of the above-described embodiment.
Furthermore, the logic instructions in the memory 61 may be implemented in the form of software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product.
The memory 61 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 60 executes functional applications and data processing by running software programs, instructions and modules stored in the memory 61, that is, implements the control method for the fixed-frequency air conditioner in the above-described method embodiment.
The memory 61 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 61 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 (17)
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 state of the pressure reducing valve 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 according to claim 1, wherein the controlling the working state of the pressure reducing valve according to the relation between the real-time exhaust temperature and the preset exhaust temperature comprises:
and controlling the pressure reducing valve to be in an opening state 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 a first preset duration.
4. The method of claim 3, wherein controlling the pressure relief valve to be in an open state further comprises:
and under the condition that the real-time exhaust temperature is lower than the preset exhaust temperature, controlling the pressure reducing valve to be in a closed state after a second preset time.
5. The method of claim 3, further comprising:
and after controlling the pressure reducing valve to be in an open state for a third preset time, 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.
6. The method of any of claims 1 to 5, 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.
7. The method of claim 6, 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.
8. The method of claim 6, 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.
9. 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 state of the pressure reducing valve according to the relation between the real-time exhaust temperature and the preset exhaust temperature.
10. The apparatus of claim 9, 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.
11. The apparatus of claim 9,
the control module is configured to: and controlling the pressure reducing valve to be in an opening state 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 a first preset duration.
12. The apparatus of claim 11,
the control module is further configured to: and after the pressure reducing valve is controlled to be in an opening state, under the condition that the real-time exhaust temperature is lower than the preset exhaust temperature, the pressure reducing valve is controlled to be in a closing state after a second preset time.
13. The apparatus of claim 11,
the control module is further configured to: and after controlling the pressure reducing valve to be in an open state for a third preset time, 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.
14. The apparatus according to any one of claims 9 to 13,
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.
15. The apparatus of claim 14,
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.
16. The apparatus of claim 14,
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.
17. A constant-frequency air conditioner, characterized by comprising the control device for a constant-frequency air conditioner according to any one of claims 9 to 16.
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