CN112856736A - Control method and device of air conditioner, air conditioner and readable storage medium - Google Patents
Control method and device of air conditioner, air conditioner and readable storage medium Download PDFInfo
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- CN112856736A CN112856736A CN201911196237.0A CN201911196237A CN112856736A CN 112856736 A CN112856736 A CN 112856736A CN 201911196237 A CN201911196237 A CN 201911196237A CN 112856736 A CN112856736 A CN 112856736A
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
- F25B2600/00—Control issues
- F25B2600/01—Timing
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/17—Speeds
- F25B2700/171—Speeds of the compressor
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2116—Temperatures of a condenser
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
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Abstract
The invention provides a control method and a control device of an air conditioner, the air conditioner and a readable storage medium, wherein the method comprises the following steps: acquiring the running frequency, the saturated condensing temperature and the saturated evaporating temperature of a compressor of the air conditioner, and acquiring the outdoor temperature; determining a target discharge temperature based on the compressor operating frequency, the saturated condensing temperature, the saturated evaporating temperature, and the outdoor temperature; and controlling the air conditioner to operate according to the target exhaust temperature. The method determines that the target exhaust temperature is more suitable for the actual running state of the air conditioner according to multiple comprehensive factors; the operation of the air conditioner is controlled according to the target exhaust temperature, so that the operation performance of the air conditioner is improved, and the energy efficiency and the energy saving performance of the air conditioner are improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and device of an air conditioner, the air conditioner and a readable storage medium.
Background
With the increasing requirements on energy conservation and environmental protection, the admission level of energy efficiency is also increased year by year, and the demand of consumers is increased, so that the high-energy-efficiency household air conditioner is more and more favored. The high-energy-efficiency household air conditioner usually uses an expansion valve for throttling, the capacity and the energy efficiency of the household air conditioner under low load are improved by changing the flow, and the current mainstream method comprises the step of controlling according to the exhaust superheat degree.
When the control is performed according to the exhaust superheat degree, generally, the target exhaust temperature is estimated only according to the condensation temperature, and then the control is performed according to the estimated target exhaust temperature, but the estimated target exhaust temperature is not an optimal value in many cases, and the energy efficiency of the air conditioner is reduced.
Disclosure of Invention
The invention mainly aims to provide a control method and device of an air conditioner, the air conditioner and a readable storage medium, and aims to solve the technical problem that the existing exhaust superheat degree control method reduces the energy efficiency of the air conditioner.
In order to achieve the above object, an embodiment of the present invention provides a method for controlling an air conditioner, including:
acquiring the running frequency, the saturated condensing temperature and the saturated evaporating temperature of a compressor of the air conditioner, and acquiring the outdoor temperature;
determining a target discharge temperature based on the compressor operating frequency, the saturated condensing temperature, the saturated evaporating temperature, and the outdoor temperature;
and controlling the air conditioner to operate according to the target exhaust temperature.
Optionally, the step of obtaining the compressor operating frequency, the saturated condensing temperature and the saturated evaporating temperature of the air conditioner includes:
acquiring the running frequency of a compressor of the air conditioner;
acquiring the compressor exhaust pressure and the compressor return pressure of the air conditioner, and determining the refrigerant type of the air conditioner;
and determining the saturated condensing temperature of the air conditioner according to the refrigerant type and the compressor discharge pressure, and determining the saturated evaporating temperature of the air conditioner according to the refrigerant type and the compressor return pressure.
Optionally, the step of controlling the operation of the air conditioner according to the target exhaust gas temperature includes:
acquiring the current compressor exhaust temperature of the air conditioner at the current moment, and determining a target temperature difference value between the current compressor exhaust temperature and the target exhaust temperature;
and controlling the air conditioner to operate according to the target temperature difference.
Optionally, before the step of controlling the air conditioner to operate according to the target temperature difference, the method further includes:
acquiring historical compressor exhaust temperature of the air conditioner at the last moment, and determining a historical temperature difference value between the historical compressor exhaust temperature and the current compressor exhaust temperature;
the step of controlling the operation of the air conditioner according to the target temperature difference includes:
and determining a corresponding expansion valve correction value according to the target temperature difference value and the historical temperature difference value, and adjusting the opening of the expansion valve of the air conditioner according to the expansion valve correction value.
Optionally, the step of determining a target discharge temperature based on the compressor operating frequency, the saturated condensing temperature, the saturated evaporating temperature, and the outdoor temperature comprises:
substituting the compressor operating frequency, the saturated condensing temperature, the saturated evaporating temperature and the outdoor temperature into a preset exhaust formula, and calculating to obtain a target exhaust temperature, wherein the preset exhaust formula is as follows:
Tp1＝a×H+b×(T1+fm)+c×(T2+fe)+d+e×To
wherein Tp1 is the target exhaust temperature;
a is a preset frequency coefficient, and a is more than or equal to 0;
h is the compressor operating frequency;
b is a preset condensation temperature coefficient, and b is more than or equal to 0;
t1 is the saturated condensing temperature;
fm is a preset condensation correction coefficient, and fm is more than or equal to 0;
c is a preset evaporation temperature coefficient, and c is less than or equal to 0;
t2 is the saturated evaporation temperature;
fe is a preset evaporation correction coefficient, and is more than or equal to 0;
d is a preset constant;
e is a preset outdoor temperature coefficient, and e is more than or equal to 0;
to is the outdoor temperature.
Optionally, the step of obtaining the compressor operating frequency, the saturated condensing temperature and the saturated evaporating temperature of the air conditioner and obtaining the outdoor temperature further includes:
and after the air conditioner is started and operates for a preset time, acquiring the operating frequency, the saturated condensation temperature and the saturated evaporation temperature of a compressor of the air conditioner, and acquiring the outdoor temperature.
Optionally, after the step of controlling the operation of the air conditioner according to the target exhaust temperature, the method further includes:
and generating a corresponding control log according to the control process of the air conditioner.
In addition, to achieve the above object, an embodiment of the present invention further provides a control device for an air conditioner, including:
the acquisition module is used for acquiring the running frequency, the saturated condensation temperature and the saturated evaporation temperature of a compressor of the air conditioner and acquiring the outdoor temperature;
a determination module for determining a target discharge temperature based on the compressor operating frequency, the saturated condensing temperature, the saturated evaporating temperature, and the outdoor temperature;
and the control module is used for controlling the air conditioner to operate according to the target exhaust temperature.
In addition, to achieve the above object, an embodiment of the present invention further provides an air conditioner, which includes a processor, a memory, and a computer program stored on the memory and executable by the processor, wherein when the computer program is executed by the processor, the steps of the control method of the air conditioner as described above are implemented.
In addition, to achieve the above object, an embodiment of the present invention further provides a readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the steps of the control method of the air conditioner as described above.
According to the embodiment of the invention, the target exhaust temperature is determined according to the obtained compressor running frequency, saturated condensing temperature, saturated evaporating temperature and outdoor temperature of the air conditioner, and then the air conditioner is controlled to run according to the target exhaust temperature, so that multiple factors such as a low-pressure side (saturated evaporating temperature) and the compressor running condition (compressor running frequency) when the air conditioner runs are comprehensively considered when the target exhaust temperature is determined, and the determined target exhaust temperature is more suitable for the actual running state of the air conditioner; the operation of the air conditioner is controlled according to the target exhaust temperature, so that the operation performance of the air conditioner is improved, and the energy efficiency and the energy saving performance of the air conditioner are improved.
Drawings
Fig. 1 is a schematic diagram of an air conditioner hardware architecture according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a control method of an air conditioner according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of an air conditioner according to a first embodiment of a control method of the air conditioner of the present invention;
fig. 4 is a functional block diagram of a control device of an air conditioner according to a first embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration and are not intended to limit the invention.
The control method of the air conditioner related to the embodiment of the invention is mainly applied to the air conditioner.
Referring to fig. 1, fig. 1 is a schematic diagram of an air conditioner hardware architecture according to an embodiment of the present invention. In the embodiment of the present invention, the air conditioner includes a general air conditioner, and may include a processor 1001 (e.g., a Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used for realizing connection communication among the components; the user interface 1003 may include a Display screen (Display), an input unit such as a key (Keyboard); the network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WI-FI interface, WI-FI interface); the memory 1005 may be a Random Access Memory (RAM) or a non-volatile memory (non-volatile memory), such as a magnetic disk memory, and the memory 1005 may optionally be a storage device independent of the processor 1001. Those skilled in the art will appreciate that the hardware configuration depicted in FIG. 1 is not intended to be limiting of the present invention, and may include more or less components than those shown, or some components in combination, or a different arrangement of components.
With continued reference to FIG. 1, the memory 1005 of FIG. 1, which is one type of readable storage medium, may include an operating system, a network communication module, and a computer program. In fig. 1, the network communication module may be used to connect the user terminal and perform data communication with the user terminal; and the processor 1001 may call up a computer program stored in the memory 1005 and perform the following steps:
acquiring the running frequency, the saturated condensing temperature and the saturated evaporating temperature of a compressor of the air conditioner, and acquiring the outdoor temperature;
determining a target exhaust temperature according to the compressor operating frequency, the saturated condensing temperature, the saturated evaporating temperature and the outdoor temperature;
and controlling the air conditioner to operate according to the target exhaust temperature.
Further, the step of obtaining the compressor operating frequency, the saturated condensing temperature and the saturated evaporating temperature of the air conditioner includes:
acquiring the running frequency of a compressor of the air conditioner;
acquiring the compressor exhaust pressure and the compressor return pressure of the air conditioner, and determining the refrigerant type of the air conditioner;
and determining the saturated condensing temperature of the air conditioner according to the refrigerant type and the compressor discharge pressure, and determining the saturated evaporating temperature of the air conditioner according to the refrigerant type and the compressor return pressure.
Further, the step of controlling the operation of the air conditioner according to the target exhaust temperature includes:
acquiring the current compressor exhaust temperature of the air conditioner at the current moment, and determining a target temperature difference value between the current compressor exhaust temperature and the target exhaust temperature;
and controlling the air conditioner to operate according to the target temperature difference.
Further, before the step of controlling the operation of the air conditioner according to the target temperature difference, the method further includes:
acquiring historical compressor exhaust temperature of the air conditioner at the last moment, and determining a historical temperature difference value between the target exhaust temperature and the historical compressor exhaust temperature;
the step of controlling the operation of the air conditioner according to the target temperature difference includes:
and determining a corresponding expansion valve correction value according to the target temperature difference value and the historical temperature difference value, and adjusting the opening of the expansion valve of the air conditioner according to the expansion valve correction value.
Further, the step of determining a target discharge temperature according to the compressor operating frequency, the saturated condensing temperature, the saturated evaporating temperature, and the outdoor temperature includes:
substituting the compressor operating frequency, the saturated condensing temperature, the saturated evaporating temperature and the outdoor temperature into a preset exhaust formula, and calculating to obtain a target exhaust temperature, wherein the preset exhaust formula is as follows:
Tp1＝a×H+b×(T1+fm)+c×(T2+fe)+d+e×To
wherein Tp1 is the target exhaust temperature;
a is a preset frequency coefficient, and a is more than or equal to 0;
h is the compressor operating frequency;
b is a preset condensation temperature coefficient, and b is more than or equal to 0;
t1 is the saturated condensing temperature;
fm is a preset condensation correction coefficient, and fm is more than or equal to 0;
c is a preset evaporation temperature coefficient, and c is less than or equal to 0;
t2 is the saturated evaporation temperature;
fe is a preset evaporation correction coefficient, and is more than or equal to 0;
d is a preset constant;
e is a preset outdoor temperature coefficient, and e is more than or equal to 0;
to is the outdoor temperature.
Further, the step of obtaining the operating frequency of the compressor, the saturated condensing temperature and the saturated evaporating temperature of the air conditioner and obtaining the outdoor temperature further includes:
and after the air conditioner is started and operates for a preset time, acquiring the operating frequency, the saturated condensation temperature and the saturated evaporation temperature of a compressor of the air conditioner, and acquiring the outdoor temperature.
Further, after the step of controlling the operation of the air conditioner according to the target exhaust temperature, the method further includes:
and generating a corresponding control log according to the control process of the air conditioner.
The embodiment of the invention provides a control method of an air conditioner.
Referring to fig. 2, fig. 2 is a flowchart illustrating a control method of an air conditioner according to a first embodiment of the present invention.
In this embodiment, the control method of the air conditioner includes the following steps:
step S10, obtaining the compressor running frequency, the saturated condensing temperature and the saturated evaporating temperature of the air conditioner, and obtaining the outdoor temperature;
the existing high-energy-efficiency household air conditioner generally uses an expansion valve for throttling, the capacity and the energy efficiency of the household air conditioner under low load are improved by changing the flow, and the existing main flow control method comprises the step of controlling according to the exhaust superheat degree. When the control is performed according to the exhaust superheat degree, the control is generally performed according to the target exhaust temperature estimated only from the condensation temperature, and then according to the estimated target exhaust temperature, but the estimated target exhaust temperature is not an optimal value in many cases, and the energy efficiency of the air conditioner is reduced. In view of the above, the present embodiment provides a control method of an air conditioner, which obtains an operating frequency of a compressor, a saturated condensing temperature, a saturated evaporating temperature, and an outdoor temperature of the air conditioner, determines a target exhaust temperature according to the parameters, and then controls the air conditioner to operate according to the target exhaust temperature, so that multiple factors, such as a low-pressure side (saturated evaporating temperature) and an operating condition of the compressor (operating frequency of the compressor) when the air conditioner operates, are taken into consideration when determining the target exhaust temperature, and the determined target exhaust temperature is more suitable for an actual operating state of the air conditioner; the operation of the air conditioner is controlled according to the target exhaust temperature, so that the operation performance of the air conditioner is improved, and the energy efficiency and the energy saving performance of the air conditioner are improved.
The control method of the air conditioner of the embodiment is mainly applied to the air conditioner, that is, the air conditioner controls the operation condition of the air conditioner, and may also be applied to a certain control device (or terminal, device), and the control device controls the air conditioner, and of course, the control device may be a single device, or an abstract function device composed of a plurality of different entity devices. For convenience of explanation, the present embodiment will be described by taking an example in which the air conditioner controls itself. For the air conditioner, including the components of a general air conditioner, as can be seen from fig. 3, fig. 3 is a schematic structural diagram of the air conditioner of this embodiment; the air conditioner comprises a compressor, an outdoor heat exchanger, an axial flow wind wheel, an expansion valve (which can be an electronic expansion valve), an indoor heat exchanger, a cross flow wind wheel, a four-way valve and other components. It is worth to be noted that other components can be added to the air conditioner according to actual needs; for example, a first pressure sensor is arranged at the exhaust port of the compressor and used for detecting the exhaust pressure of the compressor; a second pressure sensor is arranged at the air return port of the compressor and used for detecting the air return pressure of the compressor; an outdoor temperature sensor is disposed at the outdoor heat exchanger for detecting the outdoor temperature, although the outdoor temperature sensor may be disposed at other positions.
In this embodiment, when the air conditioner is running, the compressor running frequency H of the compressor, the saturated condensing temperature T1 of the air conditioner, and the saturated evaporating temperature T2 may be obtained; the outdoor temperature To will also be obtained by the outdoor temperature sensor.
Further, the step S10 includes:
and after the air conditioner is started and operates for a preset time, acquiring the operating frequency, the saturated condensation temperature and the saturated evaporation temperature of a compressor of the air conditioner, and acquiring the outdoor temperature.
In practice, when the air conditioner is just started, because the operation condition does not reach a relatively stable state, the air conditioner may obtain parameters of the compressor operation frequency H of the compressor, the saturated condensing temperature T1 of the air conditioner, the saturated evaporating temperature T2, and the outdoor temperature To after the air conditioner is started To operate for a certain time, so as To avoid analysis errors caused by unstable operation condition on subsequent analysis. In addition, the outdoor temperature is obtained by the outdoor temperature sensor of the air conditioner in the embodiment, but in practice, the outdoor temperature sensor is not arranged on the air conditioner, and the indoor temperature is obtained by other independent equipment and then sent To the air conditioner.
Still further, the step of obtaining the compressor operating frequency, the saturated condensing temperature and the saturated evaporating temperature of the air conditioner includes:
acquiring the running frequency of a compressor of the air conditioner;
in this embodiment, the operation frequency of the compressor may be obtained by directly detecting the operation state of the compressor.
Acquiring the compressor exhaust pressure and the compressor return pressure of the air conditioner, and determining the refrigerant type of the air conditioner;
for the saturated condensing temperature T1 of the air conditioner, the relation is formed between the saturated condensing temperature T1 and the compressor exhaust pressure and the refrigerant type of the air conditioner, and when the compressor exhaust pressure and the refrigerant type of the air conditioner are determined, the saturated condensing temperature T1 of the air conditioner can be determined according to the relation; similarly, the saturated evaporating temperature T2 of the air conditioner has a relationship with the return air pressure of the compressor of the air conditioner and the type of the refrigerant, and when the return air pressure of the compressor of the air conditioner and the type of the refrigerant are determined, the saturated condensing temperature T2 of the air conditioner can be determined according to the relationship. For this, a corresponding table of relationship among the refrigerant type, the compressor discharge/return pressure, and the saturated condensing/evaporating pressure may be preset (or obtained), then the compressor discharge pressure of the air conditioner may be obtained by the first pressure sensor, the compressor return pressure may be obtained by the second pressure sensor, and the refrigerant type of the air conditioner may be determined.
And determining the saturated condensing temperature of the air conditioner according to the refrigerant type and the compressor discharge pressure, and determining the saturated evaporating temperature of the air conditioner according to the refrigerant type and the compressor return pressure.
When the compressor discharge pressure, the compressor return pressure and the refrigerant type of the air conditioner are obtained, the relation corresponding table can be inquired, the corresponding saturated condensing temperature T1 is determined according to the refrigerant type and the compressor discharge pressure, and the saturated evaporating temperature T2 of the air conditioner is determined according to the refrigerant type and the compressor return pressure.
Through the mode, the saturated condensing temperature and the saturated evaporating temperature of the air conditioner can be quickly determined through the pressure conversion mode, and the method is simple and convenient and can provide necessary parameters for the subsequent analysis process.
And step S20, determining a target exhaust temperature according to the compressor running frequency, the saturated condensing temperature, the saturated evaporating temperature and the outdoor temperature.
In the present embodiment, when the compressor operating frequency H, the saturated condensing temperature T1, the saturated evaporating temperature T2, and the outdoor temperature To are obtained, the corresponding target discharge temperature Tp can be determined from these parameters. When the target exhaust temperature is determined, multiple factors such as a low-pressure side (saturated evaporation temperature) and a compressor operation condition (compressor operation frequency) during the operation of the air conditioner are comprehensively considered, so that the determined target exhaust temperature is more suitable for the actual operation state of the air conditioner.
Specifically, the step S20 includes:
substituting the compressor operating frequency, the saturated condensing temperature, the saturated evaporating temperature and the outdoor temperature into a preset exhaust formula, and calculating to obtain a target exhaust temperature, wherein the preset exhaust formula is as follows:
Tp1＝a×H+b×(T1+fm)+c×(T2+fe)+d+e×To
wherein Tp1 is the target exhaust temperature;
a is a preset frequency coefficient, a is more than or equal to 0 (for example, a can be between 0 and 2.55); a is fixed for the same air conditioner (or the same cooling/heating system), but a may take different values for different air conditioners (or different cooling/heating systems).
H is the running frequency of the compressor;
b is a preset condensation temperature coefficient, and b is more than or equal to 0 (for example, b can be between 0 and 25.5); b is fixed for the same air conditioner (or the same cooling/heating system), but can take different values for different air conditioners (or different cooling/heating systems);
t1 is the saturated condensing temperature;
fm is a preset condensation correction coefficient, and fm is more than or equal to 0 (for example, fm can be a value between 0 and 25.5); for the same air conditioner (or the same cooling/heating system), fm is fixed, but for different air conditioners (or different cooling/heating systems), fm can take different values;
c is a preset evaporation temperature coefficient, and c is less than or equal to 0 (for example, c can be a value between-2.55 and 0); c is fixed for the same air conditioner (or the same cooling/heating system), but can take different values for different air conditioners (or different cooling/heating systems);
t2 is the saturated evaporation temperature;
fe is a preset evaporation correction coefficient, and is more than or equal to 0 (for example, fe can be a value between 0 and 25.5); for the same air conditioner (or the same cooling/heating system), fe is fixed, but for different air conditioners (or different cooling/heating systems), fe can take different values;
d is a predetermined constant (e.g., d can be between-127 and 127); d is fixed for the same air conditioner (or the same cooling/heating system), but can take different values for different air conditioners (or different cooling/heating systems);
e is a preset outdoor temperature coefficient, and e is more than or equal to 0 (for example, e can be a value between 0 and 25.5); e is fixed for the same air conditioner (or the same cooling/heating system), but can take different values for different air conditioners (or different cooling/heating systems);
to is the outdoor temperature.
In the process of obtaining the target exhaust temperature through calculation in the formula, a plurality of actual operation parameters and environmental parameters are comprehensively considered, and the influence of different air conditioners (compressors) under different working conditions (efficiency, frequency and the like) is corrected through a plurality of coefficients, so that the determined target exhaust temperature is more suitable for the actual operation state of the air conditioner.
And step S30, controlling the air conditioner to operate according to the target exhaust temperature.
In this embodiment, when the target discharge temperature Tp is determined, the operation of the air conditioner may be controlled according to the target discharge temperature Tp, for example, the opening degree of the expansion valve is adjusted, the operation frequency of the compressor is adjusted, and the air volume is adjusted, so that the air conditioner operates at the optimal performance, and the energy efficiency of the air conditioner is improved.
In the embodiment, the operation frequency, the saturated condensing temperature and the saturated evaporating temperature of the compressor of the air conditioner are obtained, and the outdoor temperature is obtained; determining a target discharge temperature based on the compressor operating frequency, the saturated condensing temperature, the saturated evaporating temperature, and the outdoor temperature; and controlling the air conditioner to operate according to the target exhaust temperature. Through the mode, the target exhaust temperature is determined according to the obtained compressor operation frequency, the saturated condensation temperature, the saturated evaporation temperature and the outdoor temperature of the air conditioner, and then the air conditioner is controlled to operate according to the target exhaust temperature, so that multiple factors such as the low-pressure side (saturated evaporation temperature) and the compressor operation condition (compressor operation frequency) when the air conditioner operates are comprehensively considered when the target exhaust temperature is determined, and the determined target exhaust temperature is more suitable for the actual operation state of the air conditioner; the operation of the air conditioner is controlled according to the target exhaust temperature, so that the operation performance of the air conditioner is improved, and the energy efficiency and the energy saving performance of the air conditioner are improved.
Based on the first embodiment described above, a second embodiment of the control method of the air conditioner of the present invention is proposed.
In this embodiment, the step S30 includes:
acquiring the current compressor exhaust temperature of the air conditioner at the current moment, and determining a target temperature difference value between the current compressor exhaust temperature and the target exhaust temperature;
and controlling the air conditioner to operate according to the target temperature difference.
In the embodiment, when the target exhaust temperature Tp is obtained, the current compressor exhaust temperature Tp0 of the air conditioner at the current time can be further obtained, the target temperature difference Δ T1 between the current compressor exhaust temperature Tp0 and the target exhaust temperature Tp is further calculated, namely, Δ T1 is Tp0-Tp, and then the air conditioner operation is controlled according to the target temperature difference Δ T1. The control process can be defined according to actual conditions, for example, the control can be performed by adjusting the opening degree of the expansion valve, the operation frequency of the compressor, the air volume and the like, so that the target temperature difference Δ T1 is maintained within a certain range (for example, maintained between-1 and 1); in addition, the air conditioner may be controlled by combining other numerical values.
Optionally, the step of controlling the air conditioner to operate according to the target temperature difference further includes:
acquiring historical compressor exhaust temperature of the air conditioner at the last moment, and determining a historical temperature difference value between the historical compressor exhaust temperature and the current compressor exhaust temperature;
in this embodiment, the air conditioner control process may be performed in real time or periodically, for example, once every three minutes, and the air conditioner control process may be performed in combination with the operation condition of the compressor at the previous time (or previous period). Specifically, the air conditioner may further obtain a compressor discharge temperature at a previous time (or a previous adjustment period), which may be referred to as a historical compressor discharge temperature Tp0 ', and further calculate a historical temperature difference Δ T2 between the current compressor discharge temperature Tp0 and the target discharge temperature Tp, i.e., Δ T2 — Tp 0' -Tp 0.
The step of controlling the operation of the air conditioner according to the target temperature difference includes:
and determining a corresponding expansion valve correction value according to the target temperature difference value and the historical temperature difference value, and adjusting the opening of the expansion valve of the air conditioner according to the expansion valve correction value.
In this embodiment, when the historical temperature difference is obtained, a corresponding expansion valve correction value may be determined according to the target temperature difference and the historical temperature difference, where the expansion valve correction value represents an opening adjustment manner of the expansion valve, and then the opening of the expansion valve of the air conditioner is adjusted based on the expansion valve correction value. The determination process of the expansion valve correction value may be a preset (or obtained) corresponding relation table between the target temperature difference, the historical temperature difference and the expansion valve correction value, for example, table 1 shown in table 1 below
When the target temperature difference Δ T1 and the historical temperature difference Δ T2 are obtained, the table may be looked up to obtain a corresponding value, which is an expansion valve correction value, which may be directly the number of steps of the expansion valve (where a positive value is open, a negative value is closed, and zero remains unchanged). For example, when the target temperature difference Δ T1 is-2 and the historical temperature difference Δ T2 is-1, the expansion valve correction value-2 can be obtained by referring to table 1, and the expansion valve can be closed by 2 steps according to the expansion valve correction value-2; for another example, when the target temperature difference Δ T1 is 0 and the historical temperature difference Δ T2 is 1, the expansion valve correction value 1 can be obtained by referring to table 1, and the expansion valve can be opened by 1 step according to the expansion valve correction value 1; for another example, when the target temperature difference Δ T1 is-1 and the historical temperature difference Δ T2 is 1, the expansion valve correction value 0 can be obtained by referring to table 1, and the expansion valve opening degree can be kept constant at the current time according to the expansion valve correction value 0. Of course, in practice, the expansion valve correction value may represent other specific operations, and the above table 1 (correspondence table) may be in other forms.
Through the mode, the expansion valve of the air conditioner is controlled by combining the target exhaust temperature, the current compressor exhaust temperature of the air conditioner at the current moment and the historical compressor exhaust temperature of the air conditioner at the previous moment, so that the operation performance of the air conditioner is improved, and the energy efficiency and the energy saving performance of the air conditioner are improved.
A third embodiment of the control method of the air conditioner of the present invention is proposed based on the first or second embodiment described above.
In this embodiment, after step S30, the method further includes:
and generating a corresponding control log according to the control process of the air conditioner.
In this embodiment, after the air conditioner is controlled, a corresponding control log may be generated according to a specific control process of the air conditioner, where the content of the control log may include initial parameters such as the obtained compressor operation frequency, the compressor discharge pressure, the saturated condensing temperature, the compressor return pressure, the saturated evaporating temperature, and the outdoor temperature, may also include a calculation process of a target discharge temperature and a target discharge temperature, and may also include how to specifically control the air conditioner, control time, and the like. Through the mode, the control process of the air conditioner can be recorded, so that a user can analyze the operation condition of the air conditioner according to the record, correspondingly maintain the air conditioner, and the stability of the operation of the air conditioner is guaranteed. In addition, the air conditioner can also be connected with a preset terminal through a network, and the preset terminal can be a user terminal (a mobile phone of a user) or a customer service terminal; and then the air conditioner can send the control log to a user terminal so that a user can know the control process of the air conditioner, or the control log is sent to a customer service terminal so that the customer service terminal can collect the actual use data of the air conditioner and use the actual use data to upgrade and optimize the air conditioner or find problems in time.
In addition, the embodiment of the invention also provides a control device of the air conditioner.
Referring to fig. 4, fig. 4 is a functional block diagram of a control device of an air conditioner according to a first embodiment of the present invention.
In this embodiment, the control device of the air conditioner includes:
an obtaining module 10, configured to obtain an operating frequency of a compressor of the air conditioner, a saturated condensing temperature, and a saturated evaporating temperature, and obtain an outdoor temperature;
a determination module 20 for determining a target discharge temperature based on the compressor operating frequency, the saturated condensing temperature, the saturated evaporating temperature, and the outdoor temperature;
and the control module 30 is used for controlling the air conditioner to operate according to the target exhaust temperature.
Each virtual function module of the control device of the air conditioner is stored in the memory 1005 shown in fig. 1, and is used for realizing all functions of controlling the air conditioner; when executed by the processor 1001, the modules may perform air conditioner control functions.
Further, the obtaining module 10 includes:
a frequency obtaining unit for obtaining the compressor running frequency of the air conditioner;
the pressure acquisition unit is used for acquiring the compressor exhaust pressure and the compressor return pressure of the air conditioner and determining the refrigerant type of the air conditioner;
and the temperature determining unit is used for determining the saturated condensing temperature of the air conditioner according to the refrigerant type and the compressor exhaust pressure, and determining the saturated evaporating temperature of the air conditioner according to the refrigerant type and the compressor return pressure.
Further, the control module 30 includes:
the difference determining unit is used for acquiring the current compressor exhaust temperature of the air conditioner at the current moment and determining the target temperature difference between the current compressor exhaust temperature and the target exhaust temperature;
and the air conditioner control unit is used for controlling the operation of the air conditioner according to the target temperature difference.
Further, the difference determining unit is further configured to obtain a historical compressor discharge temperature of the air conditioner at a previous time, and determine a historical temperature difference between the historical compressor discharge temperature and the current compressor discharge temperature;
the air conditioner control unit is also used for determining a corresponding expansion valve correction value according to the target temperature difference value and the historical temperature difference value, and adjusting the opening of the expansion valve of the air conditioner according to the expansion valve correction value.
Further, the determining module 20 is specifically configured to:
substituting the compressor operating frequency, the saturated condensing temperature, the saturated evaporating temperature and the outdoor temperature into a preset exhaust formula, and calculating to obtain a target exhaust temperature, wherein the preset exhaust formula is as follows:
Tp1＝a×H+b×(T1+fm)+c×(T2+fe)+d+e×To
wherein Tp1 is the target exhaust temperature;
a is a preset frequency coefficient, and a is more than or equal to 0;
h is the compressor operating frequency;
b is a preset condensation temperature coefficient, and b is more than or equal to 0;
t1 is the saturated condensing temperature;
fm is a preset condensation correction coefficient, and fm is more than or equal to 0;
c is a preset evaporation temperature coefficient, and c is less than or equal to 0;
t2 is the saturated evaporation temperature;
fe is a preset evaporation correction coefficient, and is more than or equal to 0;
d is a preset constant;
e is a preset outdoor temperature coefficient, and e is more than or equal to 0;
to is the outdoor temperature.
Further, the control device of the air conditioner further includes:
and the generating module is used for generating a corresponding control log according to the control process of the air conditioner.
The function implementation of each module of the control device of the air conditioner corresponds to each step in the control method embodiment of the air conditioner, and the function and implementation process are not described in detail herein.
In addition, the embodiment of the invention also provides a readable storage medium.
The readable storage medium of the present invention stores thereon a computer program, wherein the computer program, when executed by a processor, implements the steps of the control method of the air conditioner as described above.
The method implemented when the computer program is executed may refer to various embodiments of the control method of the air conditioner of the present invention, and will not be described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A control method of an air conditioner, characterized by comprising:
acquiring the running frequency, the saturated condensing temperature and the saturated evaporating temperature of a compressor of the air conditioner, and acquiring the outdoor temperature;
determining a target discharge temperature based on the compressor operating frequency, the saturated condensing temperature, the saturated evaporating temperature, and the outdoor temperature;
and controlling the air conditioner to operate according to the target exhaust temperature.
2. The control method of an air conditioner according to claim 1, wherein the step of obtaining the compressor operation frequency, the saturated condensing temperature and the saturated evaporating temperature of the air conditioner comprises:
acquiring the running frequency of a compressor of the air conditioner;
acquiring the compressor exhaust pressure and the compressor return pressure of the air conditioner, and determining the refrigerant type of the air conditioner;
and determining the saturated condensing temperature of the air conditioner according to the refrigerant type and the compressor discharge pressure, and determining the saturated evaporating temperature of the air conditioner according to the refrigerant type and the compressor return pressure.
3. The control method of an air conditioner according to claim 1, wherein the step of controlling the operation of the air conditioner according to the target exhaust temperature includes:
acquiring the current compressor exhaust temperature of the air conditioner at the current moment, and determining a target temperature difference value between the current compressor exhaust temperature and the target exhaust temperature;
and controlling the air conditioner to operate according to the target temperature difference.
4. The method of controlling an air conditioner according to claim 3, wherein the step of controlling the operation of the air conditioner according to the target temperature difference is preceded by:
acquiring historical compressor exhaust temperature of the air conditioner at the last moment, and determining a historical temperature difference value between the historical compressor exhaust temperature and the current compressor exhaust temperature;
the step of controlling the operation of the air conditioner according to the target temperature difference includes:
and determining a corresponding expansion valve correction value according to the target temperature difference value and the historical temperature difference value, and adjusting the opening of the expansion valve of the air conditioner according to the expansion valve correction value.
5. The control method of an air conditioner according to claim 1, wherein the step of determining a target discharge air temperature according to the compressor operation frequency, the saturated condensing temperature, the saturated evaporating temperature, and the outdoor temperature includes:
substituting the compressor operating frequency, the saturated condensing temperature, the saturated evaporating temperature and the outdoor temperature into a preset exhaust formula, and calculating to obtain a target exhaust temperature, wherein the preset exhaust formula is as follows:
Tp1＝a×H+b×(T1+fm)+c×(T2+fe)+d+e×To
wherein Tp1 is the target exhaust temperature;
a is a preset frequency coefficient, and a is more than or equal to 0;
h is the compressor operating frequency;
b is a preset condensation temperature coefficient, and b is more than or equal to 0;
t1 is the saturated condensing temperature;
fm is a preset condensation correction coefficient, and fm is more than or equal to 0;
c is a preset evaporation temperature coefficient, and c is less than or equal to 0;
t2 is the saturated evaporation temperature;
fe is a preset evaporation correction coefficient, and is more than or equal to 0;
d is a preset constant;
e is a preset outdoor temperature coefficient, and e is more than or equal to 0;
to is the outdoor temperature.
6. The control method of an air conditioner according to claim 1, wherein the step of obtaining the compressor operation frequency, the saturated condensing temperature and the saturated evaporating temperature of the air conditioner, and obtaining the outdoor temperature further comprises:
and after the air conditioner is started and operates for a preset time, acquiring the operating frequency, the saturated condensation temperature and the saturated evaporation temperature of a compressor of the air conditioner, and acquiring the outdoor temperature.
7. The control method of an air conditioner according to any one of claims 1 to 6, further comprising, after the step of controlling the operation of the air conditioner according to the target exhaust gas temperature:
and generating a corresponding control log according to the control process of the air conditioner.
8. A control apparatus of an air conditioner, comprising:
the acquisition module is used for acquiring the running frequency, the saturated condensation temperature and the saturated evaporation temperature of a compressor of the air conditioner and acquiring the outdoor temperature;
a determination module for determining a target discharge temperature based on the compressor operating frequency, the saturated condensing temperature, the saturated evaporating temperature, and the outdoor temperature;
and the control module is used for controlling the air conditioner to operate according to the target exhaust temperature.
9. An air conditioner comprising a processor, a memory, and a computer program stored on the memory and executed by the processor, wherein the computer program, when executed by the processor, implements the steps of the control method of the air conditioner according to any one of claims 1 to 7.
10. A readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the control method of an air conditioner according to any one of claims 1 to 7.
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| CN201911196237.0A CN112856736A (en) | 2019-11-28 | 2019-11-28 | Control method and device of air conditioner, air conditioner and readable storage medium |
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| CN201911196237.0A CN112856736A (en) | 2019-11-28 | 2019-11-28 | Control method and device of air conditioner, air conditioner and readable storage medium |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113531820A (en) * | 2021-06-22 | 2021-10-22 | 青岛海尔空调器有限总公司 | Method for preheating compressor of air conditioner, air conditioner and air conditioning system |
| CN113654223A (en) * | 2021-07-19 | 2021-11-16 | 青岛海尔空调器有限总公司 | Method for determining target exhaust gas temperature |
| CN113803909A (en) * | 2021-09-27 | 2021-12-17 | 广东美的制冷设备有限公司 | Control method, system and device of air source heat pump and storage medium |
| CN114719394A (en) * | 2022-04-29 | 2022-07-08 | 佛山市顺德区美的电子科技有限公司 | Control method of air conditioner |
| CN115164299A (en) * | 2022-06-10 | 2022-10-11 | 青岛海尔空调电子有限公司 | Control method, system, control device and readable storage medium of air conditioner |
-
2019
- 2019-11-28 CN CN201911196237.0A patent/CN112856736A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113531820A (en) * | 2021-06-22 | 2021-10-22 | 青岛海尔空调器有限总公司 | Method for preheating compressor of air conditioner, air conditioner and air conditioning system |
| CN113654223A (en) * | 2021-07-19 | 2021-11-16 | 青岛海尔空调器有限总公司 | Method for determining target exhaust gas temperature |
| WO2023000551A1 (en) * | 2021-07-19 | 2023-01-26 | 青岛海尔空调器有限总公司 | Target exhaust temperature determination method |
| CN113803909A (en) * | 2021-09-27 | 2021-12-17 | 广东美的制冷设备有限公司 | Control method, system and device of air source heat pump and storage medium |
| CN113803909B (en) * | 2021-09-27 | 2022-11-08 | 广东美的制冷设备有限公司 | Control method, system and device of air source heat pump and storage medium |
| CN114719394A (en) * | 2022-04-29 | 2022-07-08 | 佛山市顺德区美的电子科技有限公司 | Control method of air conditioner |
| CN114719394B (en) * | 2022-04-29 | 2023-12-22 | 佛山市顺德区美的电子科技有限公司 | Control method of air conditioner |
| CN115164299A (en) * | 2022-06-10 | 2022-10-11 | 青岛海尔空调电子有限公司 | Control method, system, control device and readable storage medium of air conditioner |
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