CN110736273A - Control method and control device for air make-up enthalpy increase of air conditioner and air conditioner - Google Patents
Control method and control device for air make-up enthalpy increase of air conditioner and air conditioner Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000003507 refrigerant Substances 0.000 claims abstract description 199
- 238000010438 heat treatment Methods 0.000 claims abstract description 100
- 239000007788 liquid Substances 0.000 claims abstract description 60
- 239000013589 supplement Substances 0.000 claims description 34
- 230000001502 supplementing effect Effects 0.000 claims description 9
- 238000004378 air conditioning Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 12
- 230000006698 induction Effects 0.000 description 10
- 230000007423 decrease Effects 0.000 description 9
- 230000006870 function Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000010257 thawing Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000004590 computer program Methods 0.000 description 3
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
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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
- 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
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/01—Heaters
Abstract
The control method provided by the embodiment of the disclosure can control the heating operation of the liquid inlet refrigerant of the gas-liquid separator according to the air supply of the air conditioner to the compressor, thereby improving the temperature and the flow of the liquid inlet refrigerant which is changed into a gaseous state after being heated and then is divided out of the branch refrigerant for air supply, and effectively improving the problem of poor actual heating auxiliary effect of the air supply mode adopted by the air conditioner by matching the mode of controlling the refrigerant flow of the refrigerant circulation loop and/or the air supply branch with the heating operation of the liquid inlet refrigerant.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to control methods and devices for air make-up enthalpy increase of an air conditioner and the air conditioner.
Background
With the development of science and technology, an air conditioner serving as necessary electrical equipment for ordinary people's daily life is gradually developed from the first single-cold type to an advanced type capable of having more functions of refrigeration, heating, defrosting and the like, wherein important inevitable problems to be faced by air conditioner products operating in low-temperature areas or under the weather conditions with heavy wind and snow are the frosting problem of an air conditioner outdoor unit, an outdoor heat exchanger of the outdoor unit plays the role of an evaporator for absorbing heat from the outdoor environment, is influenced by the temperature and the humidity of the outdoor environment in winter, more frost is easily condensed on the outdoor heat exchanger, the heating capacity of the air conditioner is lower and lower after the frost is condensed to , meanwhile, under the severe outdoor working conditions and frosting conditions, the heat absorbed by the outdoor heat exchanger from the outdoor environment is greatly reduced, the heat absorbed by the refrigerant evaporated into a gaseous refrigerant is reduced, so that the liquid refrigerant in an air conditioner circulation loop is more and the gaseous refrigerant is less, the temperature and the flow of air return air and suction of the refrigerant of the compressor are reduced due to the , and the heating performance of the air conditioner is greatly reduced.
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:
in the related technology, aiming at outdoor severe working conditions, an air supplementing structure capable of shunting part of refrigerants to supplement air and increase enthalpy of a compressor is additionally arranged on part of the existing air conditioner type, so that the temperature and the flow rate of the refrigerants at the air return end of the compressor are improved by utilizing the supplemented refrigerants, but the flow rate of the refrigerants for supplementing air is changed just by a valve structure such as an electronic expansion valve and the like in the existing air supplementing structure design , the control mode of the design is single , and parameters such as the temperature of the refrigerants for supplementing air, the flow rate of the refrigerants which continuously flow along an original refrigerant circulation loop after being shunted and the temperature cannot be adjusted and controlled, so that the gain of the air supplementing structure design on the heating performance of the air conditioner is still limited.
Disclosure of Invention
This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments, but is intended to be a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides control methods and control devices for air make-up enthalpy increase of an air conditioner and the air conditioner, so as to solve the technical problem that the actual heating auxiliary effect of an air make-up mode adopted by the air conditioner in the related art is poor.
In , the method for controlling air make-up enthalpy increase of the air conditioner comprises:
under the condition that the air conditioner supplements air to the compressor, the liquid inlet refrigerant of the gas-liquid separator is controlled to be heated; the air supplement comprises controlling at least part of the refrigerant circulation loop to flow back to the compressor along an air supplement branch through the gas-liquid separator;
and controlling the refrigerant flow of the refrigerant circulation loop and/or the air supplement branch according to the air return parameters.
In , the apparatus for controlling air conditioning air make-up enthalpy increase includes a processor and a memory storing program instructions, and the processor is configured to execute the method for controlling air conditioning air make-up enthalpy increase according to embodiments.
In embodiments, an air conditioner includes:
the refrigerant circulating loop is formed by connecting an outdoor heat exchanger, an indoor heat exchanger, a throttling device and a compressor through refrigerant pipelines;
the air supplement branch, wherein the end is communicated with an air supplement port of the compressor, and the end is communicated with a gas-liquid separator arranged between the indoor heat exchanger and the outdoor heat exchanger;
the heating device is arranged on the refrigerant liquid inlet pipeline of the gas-liquid separator in the heating mode and is configured to heat the refrigerant flowing through the refrigerant liquid inlet pipeline;
the control device for air make-up enthalpy increase of the air conditioner, as in the embodiments, is electrically connected with the throttling device and the control valve.
The control method and device for air make-up enthalpy increase of the air conditioner and the air conditioner provided by the embodiment of the disclosure can achieve the following technical effects:
the control method for air supplement and enthalpy increase of the air conditioner can control the heating operation of the liquid inlet refrigerant of the gas-liquid separator according to the air supplement of the air conditioner to the compressor, so that the temperature and the flow rate of the branch refrigerant which becomes gaseous after being heated and is divided to supplement air can be increased; and the mode of controlling the refrigerant flow of the refrigerant circulation loop and/or the air supply branch is matched with the heating operation of the liquid inlet refrigerant, so that the problem of poor actual heating auxiliary effect of the air supply mode adopted by the air conditioner is effectively solved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
exemplary embodiments are illustrated by corresponding drawings, which are not to be construed as limiting the embodiments, in which elements having the same reference number designation are illustrated as similar elements, and in which:
FIG. 1 is a schematic flow chart diagram illustrating a method for controlling air make-up enthalpy increase of an air conditioner according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a control device for increasing enthalpy of air make-up air provided by an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of an air conditioner provided in an embodiment of the present disclosure.
Detailed Description
In the following description, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments, however, or more embodiments may be practiced without these details.
Fig. 1 is a schematic flow chart of a control method for defrosting an air conditioner according to an embodiment of the present disclosure.
As shown in FIG. 1, in the embodiment of the present disclosure, methods for controlling air make-up enthalpy of an air conditioner are provided, which can be used to solve the problem that the actual heating auxiliary effect of an air make-up mode adopted by the air conditioner under the conditions of rain, snow or low temperature and severe cold is poor, and in the embodiment, the main flow steps of the control method include:
s101, under the condition that the air conditioner supplements air to the compressor, controlling to heat a liquid inlet refrigerant of a gas-liquid separator;
in the embodiment of the present disclosure, the air conditioner is generally set to operate in a heating mode under low-temperature and severe cold conditions, and is affected by external environmental factors, so that the heating performance of the air conditioner may change, and if the external environment is severe, the cooling and heating load of the air conditioner increases, the heat absorption amount of the outdoor heat exchanger from the outdoor environment decreases, and the amount of the gaseous refrigerant formed by the liquid refrigerant through heat absorption and vaporization decreases accordingly, so that when the refrigerant flows back from the outdoor heat exchanger to the air return end of the compressor, the excess liquid refrigerant may be stored in the liquid reservoir, and only the gaseous refrigerant flows back to the compressor.
Therefore, when the air conditioner is in heating operation, the air supply to the compressor is controlled.
In the embodiment of the present disclosure, in step S101, the compressor is compensated with air, and the temperature and the flow rate of the gaseous refrigerant in the refrigerant flowing back to the compressor can be increased by means of air compensation, so that the temperature and the flow rate of the refrigerant flowing back to the compressor are increased by applying air compensation operation in the heating process, so as to improve the heating performance of the air conditioner in the heating condition.
Optionally, the air conditioner is provided with an air supplement branch, wherein the end of the air conditioner is communicated with an air supplement port of the compressor, the end of the air conditioner is communicated with a gas-liquid separator arranged between the indoor heat exchanger and the outdoor heat exchanger, and the air supplement branch is provided with a control valve, so that the air supplement operation of the compressor in the step S101 can be executed through the air supplement branch and relevant accessories thereof, and the air supplement comprises that at least part of the refrigerant circulation loop flows back to the compressor along the air supplement branch through the gas-liquid separator.
In the embodiment of the disclosure, by heating the liquid refrigerant of the gas-liquid separator, part of the liquid refrigerant which is heat-released and liquefied in the indoor heat exchanger in the heating mode can be vaporized again by absorbing heat before flowing into the gas-liquid separator, and the temperature and the flow rate of the gaseous refrigerant in the refrigerant which flows back to the compressor through the gas supplementing branch are changed; under this condition, can just can reach the effect of adjusting the tonifying qi flow through the heating operation to vapour and liquid separator's feed liquor refrigerant, simultaneously, heating operation can also promote the temperature of liquid refrigerant, makes it can more easily vaporize into gaseous state refrigerant after flowing into outdoor heat exchanger to satisfy the demand that improves compressor compression performance and air conditioner heating performance.
In , the air conditioner is provided with a heating device at the refrigerant inlet pipe of the gas-liquid separator in the heating mode, the heating device is configured to controllably heat the refrigerant flowing through the refrigerant inlet pipe, and therefore the heating operation of the heating device is controlled to be turned on in step S101.
In the embodiment, the heating device is an electromagnetic heating device that heats the refrigerant pipeline by using the principle of electromagnetic induction heating, and then conducts heat to the refrigerant flowing through the refrigerant pipeline by using the refrigerant pipeline, so as to heat the refrigerant.
The electromagnetic heating device mainly comprises an induction coil and a power supply module, wherein the induction coil is wound on the refrigerant pipeline section, and the power supply module can provide alternating current for the induction coil; when the induction coil is electrified, alternating current flowing through the induction coil generates an alternating magnetic field passing through the refrigerant pipe section, and the alternating magnetic field can generate eddy currents in the refrigerant pipe section, so that the heating and warming effects can be realized by means of the energy of the eddy currents.
It should be understood that the type of the heating device for heating the refrigerant is not limited to the above electromagnetic heating device, and other types of heating devices capable of directly or indirectly heating the refrigerant in the related art may also apply the technical solution of the present application and are covered by the protection scope of the present application.
And S102, controlling the refrigerant flow of the refrigerant circulation loop and/or the air replenishing branch according to the air returning parameter.
Optionally, the return air parameter comprises a return air temperature or a return air pressure of the compressor.
Here, the return air parameter is a parameter reflecting an initial state of a refrigerant sucked by the compressor, and therefore, the quality of the initial state of the refrigerant can directly influence the quality of the discharge parameter of the compressor, and further influence the actual heating performance of the air conditioner. Therefore, in this embodiment, the return air parameter is used as a reference factor for controlling the refrigerant flow of the refrigerant circulation loop and/or the air make-up branch, and the air make-up operation is assisted to change the compression performance of the compressor by adjusting the refrigerant flow of the refrigerant circulation loop and/or the air make-up branch, so as to improve the heating performance of the air conditioner.
In alternative embodiments of the present disclosure, a temperature sensor is disposed at the air return end of the compressor, and the temperature sensor can be used to detect the real-time temperature of the refrigerant flowing through the air return end of the compressor, so that in the embodiment of the present disclosure, the real-time temperature of the refrigerant detected by the temperature sensor is used as the air return temperature of the compressor.
Similarly, the air return end of the compressor is provided with an pressure sensor, and the pressure sensor can be used for detecting the real-time pressure of the refrigerant flowing through the air return end of the compressor, so that the real-time pressure of the refrigerant detected by the pressure sensor is used as the air return pressure of the compressor in the embodiment of the disclosure.
The control method for air supplement and enthalpy increase of the air conditioner can control the heating operation of the liquid inlet refrigerant of the gas-liquid separator according to the air supplement of the air conditioner to the compressor, so that the temperature and the flow rate of the branch refrigerant which becomes gaseous after being heated and is divided to supplement air can be increased; and the mode of controlling the refrigerant flow of the refrigerant circulation loop and/or the air supply branch is matched with the heating operation of the liquid inlet refrigerant, so that the problem of poor actual heating auxiliary effect of the air supply mode adopted by the air conditioner is effectively solved.
In , the step S102 of controlling the refrigerant flow rate of the refrigerant circulation loop and/or the air make-up branch according to the air return parameter includes determining whether the air return parameter satisfies an air return refrigerant condition, and controlling the refrigerant flow rate of the refrigerant circulation loop and/or the air make-up branch according to a determination result.
Optionally, when the air-return parameter is an air-return temperature, the air-return refrigerant state condition includes: the return air temperature is greater than or equal to the return air temperature threshold. Here, the return air temperature threshold is a threshold value for determining whether only the air supply adjusting operation can meet the return air requirement of the compressor, and when the return air temperature is less than the return air temperature threshold, that is, the return air parameter does not meet the condition of the return air refrigerant state, it is indicated that only the air supply adjusting operation cannot meet the return air requirement of the compressor; and when the return air temperature is greater than or equal to the return air temperature threshold, the condition shows that only the air supply adjusting operation can meet the return air requirement of the compressor.
optionally, when the return air pressure is the return air pressure, the return air refrigerant condition includes that the return air pressure is greater than or equal to the return air pressure threshold, where the return air pressure threshold is a threshold for measuring whether only the air make-up adjustment operation can meet the return air requirement of the compressor, when the return air pressure is less than the return air pressure threshold, that is, when the return air parameter does not meet the return air refrigerant condition, it indicates that only the air make-up adjustment operation cannot meet the return air requirement of the compressor, and when the return air pressure is greater than or equal to the return air pressure threshold, it indicates that only the air make-up adjustment operation can meet the return air requirement of the compressor.
Therefore, the refrigerant flow of the refrigerant circulation loop and/or the air supplement branch can be controlled according to the judgment result.
In , the control process for adjusting the refrigerant flow rate of the refrigerant circulation loop in step S102 includes obtaining a corresponding main path flow rate reduction value from the association relationship if the air-return parameter does not satisfy the air-return refrigerant state condition, and adjusting the refrigerant flow rate of the refrigerant circulation loop according to the main path flow rate reduction value.
Here, when the return air parameter does not satisfy the return air refrigerant state condition, it indicates that the air supply to the compressor is insufficient at this time, and therefore, the refrigerant flow rate of the refrigerant circulation circuit is reduced according to the main path flow rate reduction value control to increase the refrigerant flow rate branched along the air supply branch, thereby increasing the air supply amount to the compressor.
The th association includes or more return air parameters corresponding to the main path flow reduction value, exemplary, optional return air temperatures T are shown in Table 1Return airThe correspondence with the main flow rate decrease value is, as shown in the following table,
TABLE 1
| TReturn air(unit:. degree.C.) | Main road flow reduction value (unit: L/min) |
| a1＜TReturn air≤a2 | q11 |
| a2＜TReturn air≤a3 | q12 |
| a3＜TReturn air＜TThreshold value of return air | q13 |
In the above correspondence, the return air temperature and the main passage flow rate decrease value are in a positive correlation.
In , the control process for adjusting the refrigerant flow rate of the refrigerant circulation loop in step S102 includes obtaining a corresponding main path flow rate increase value from the second association relationship if the air-return parameter satisfies the air-return refrigerant state condition, and adjusting the refrigerant flow rate of the refrigerant circulation loop according to the main path flow rate increase value.
Here, when the air return parameter satisfies the air return refrigerant state condition, it indicates that the air supply to the compressor is sufficient at this time, and therefore, the refrigerant flow rate of the refrigerant circulation circuit is increased according to the main path flow rate increase value control to increase the refrigerant flow rate along the refrigerant circulation circuit and reduce the refrigerant flow rate shunted to the air supply branch circuit, so that more refrigerants can flow through the outdoor heat exchanger to exchange heat with the outdoor environment under the condition of satisfying the air return requirement of the compressor.
The second correlation includes correspondence between one or more return air parameters and the main path flow rate increase value, exemplary, selectable return air temperatures T are shown in Table 2Return airThe correspondence relationship with the main path traffic increase value is, as shown in the following table,
TABLE 2
| TReturn air(unit:. degree.C.) | Main road flow rate increase value (unit: L/min) |
| TThreshold value of return air＜TReturn air≤b1 | q21 |
| b1＜TReturn air≤b2 | q22 |
| b2＜TReturn air | q23 |
In the above correspondence, the return air temperature and the main passage flow rate decrease value are in a positive correlation.
Optionally, a throttling device is disposed on the refrigerant circulation loop in the embodiment of the disclosure, and the throttling device may be used to adjust the flow rate of the refrigerant flowing through the refrigerant circulation loop. Therefore, in step S102, the flow rate of the refrigerant flowing through the refrigerant circulation circuit can be adjusted by changing the flow rate opening of the throttle device.
Optionally, the control valve is an electronic expansion valve, or other valves with on-off control and opening degree adjustment functions.
In alternative embodiments, the control procedure for adjusting the refrigerant flow rate of the air make-up branch in step S102 includes obtaining a corresponding branch flow rate increase value from the third correlation if the return air parameter does not satisfy the return air refrigerant state condition, and adjusting the refrigerant flow rate of the air make-up branch according to the branch flow rate increase value.
Here, when the return air parameter does not satisfy the return air refrigerant state condition, it indicates that the air supply to the compressor is insufficient at this time, and therefore, the refrigerant flow rate of the air supply branch is increased according to the branch flow rate increase value control, so as to increase the refrigerant flow rate branched along the air supply branch, thereby increasing the air supply to the compressor.
The third correlation includes correspondence between one or more return air parameters and the bypass flow rate increase, exemplary alternative return air temperatures T are shown in Table 3Return airThe correspondence with the branch flow increase value, as shown in the following table,
TABLE 3
| TReturn air(unit:. degree.C.) | Branch flow rate increase value (unit: L/min) |
| a1＜TReturn air≤a2 | q31 |
| a2＜TReturn air≤a3 | q32 |
| a3＜TReturn air＜TThreshold value of return air | q33 |
In the above corresponding relationship, the return air temperature and the branch flow rate increase value are in a negative correlation relationship.
In optional embodiments, the control procedure for adjusting the refrigerant flow rate of the air make-up branch in step S103 includes obtaining a corresponding branch flow rate decrease value from the fourth association relationship if the return air parameter satisfies the return air refrigerant state condition, and adjusting the refrigerant flow rate of the air make-up branch according to the branch flow rate decrease value.
Here, when the return air parameter satisfies the return air refrigerant condition, it indicates that the air supplement to the compressor is sufficient, and therefore, the refrigerant flow rate of the air supplement branch is controlled to be reduced according to the branch flow rate reduction value to increase the refrigerant flow rate along the refrigerant circulation loop, so that more refrigerants can flow through the outdoor heat exchanger to exchange heat with the outdoor environment under the condition of satisfying the return air requirement of the compressor.
The fourth correlation includes correspondence between one or more return air parameters and a bypass flow reduction value, exemplary, alternative return air temperatures T are shown in Table 4Return airThe correspondence with the branch flow reduction value, as shown in the table below,
TABLE 4
| TReturn air(unit:. degree.C.) | Branch flow reduction value (unit: L/min) |
| TThreshold value of return air＜TReturn air≤b1 | q41 |
| b1＜TReturn air≤b2 | q42 |
| b2＜TReturn air | q43 |
In the above corresponding relationship, the return air temperature and the branch flow reduction value are in a negative correlation relationship.
Optionally, a control valve is disposed on the air supply branch in the embodiment of the disclosure, and the control valve may be used to control the on-off state of the defrosting bypass branch and adjust the flow rate of the refrigerant flowing through the defrosting bypass branch. Therefore, in step S102, the flow rate of the refrigerant flowing through the air make-up branch can be adjusted by changing the flow rate opening of the control valve.
Optionally, the control valve is an electronic expansion valve, or other valves with on-off control and opening degree adjustment functions.
In alternative embodiments, the flow of the method for controlling air make-up enthalpy increase of an air conditioner further includes controlling heating of a liquid refrigerant of the gas-liquid separator according to the air return parameter.
In the embodiment of the disclosure, by heating the liquid refrigerant of the gas-liquid separator, part of the liquid refrigerant which is heat-released and liquefied in the indoor heat exchanger in the heating mode can be vaporized again by absorbing heat before flowing into the gas-liquid separator, and the temperature and the flow rate of the gaseous refrigerant in the refrigerant which flows back to the compressor through the gas supplementing branch are changed; under this condition, can just can reach the effect of adjusting the tonifying qi flow through the heating operation to vapour and liquid separator's feed liquor refrigerant, simultaneously, heating operation can also promote the temperature of liquid refrigerant, makes it can more easily vaporize into gaseous state refrigerant after flowing into outdoor heat exchanger to satisfy the demand that improves compressor compression performance and air conditioner heating performance.
In , the air conditioner is provided with a heating device at the refrigerant inlet pipe of the gas-liquid separator in the heating mode, and the heating device is configured to controllably heat the refrigerant flowing through the refrigerant inlet pipe, so that the heating operation of the heating device is controlled to be turned on in the step.
In the embodiment, the heating device is an electromagnetic heating device that heats the refrigerant pipeline by using the principle of electromagnetic induction heating, and then conducts heat to the refrigerant flowing through the refrigerant pipeline by using the refrigerant pipeline, so as to heat the refrigerant.
The electromagnetic heating device mainly comprises an induction coil and a power supply module, wherein the induction coil is wound on the refrigerant pipeline section, and the power supply module can provide alternating current for the induction coil; when the induction coil is electrified, alternating current flowing through the induction coil generates an alternating magnetic field passing through the refrigerant pipe section, and the alternating magnetic field can generate eddy currents in the refrigerant pipe section, so that the heating and warming effects can be realized by means of the energy of the eddy currents.
It should be understood that the type of the heating device for heating the refrigerant is not limited to the above electromagnetic heating device, and other types of heating devices capable of directly or indirectly heating the refrigerant in the related art may also apply the technical solution of the present application and are covered by the protection scope of the present application.
Optionally, according to the air return parameter, control the heating to the feed liquid refrigerant of vapour and liquid separator, include: acquiring corresponding heating parameters from the fifth incidence relation according to the return air temperature; and controlling heating according to the heating parameters.
Here, the fifth correlation includes correspondence relationships between the return air temperatures and the heating parameters, so that the corresponding heating parameters can be determined by means of a table lookup.
Optionally, the heating parameter comprises a heating rate or a heating time period.
in some optional embodiments, the flow of the method for controlling air make-up enthalpy increase of an air conditioner further includes controlling to stop air make-up for the compressor and to decrease the heating parameter of heating if an air make-up exit condition is met.
Optionally, the purge gas withdrawal condition includes: t is tAir supplement≥tThreshold value. Wherein, tAir supplementFor the accumulated time of qi supply, tThreshold valueIs the air-replenishing time length threshold value.
Here, in the air make-up process of the embodiment of the present disclosure, if the air make-up exit condition is satisfied, it indicates that the current performance of the compressor in the compressor can already satisfy the current heating requirement, so that the air make-up of the compressor is stopped by controlling to reduce the adverse effect of the decrease of the heat absorption capacity of the outdoor heat exchanger from the outdoor environment due to the excessive refrigerant in the refrigerant circulation loop consumed by the air make-up operation.
In the embodiment of the disclosure, the heating parameters of the heating operation are controlled to be reduced, and the compressor is stopped to supplement air, so that the compression performance of the compressor is improved, and the temperature of the refrigerant for supplementing air is not required to be increased by continuously heating, and therefore, the heating parameters of the heating operation are controlled to be reduced, so that the power consumption required by the heating operation is reduced, and the use cost of the air conditioner is reduced.
Fig. 2 is a schematic structural diagram of a control device for air make-up enthalpy increase of an air conditioner according to an embodiment of the disclosure.
The embodiment of the present disclosure provides control devices for increasing enthalpy of air-conditioner air make-up, the structure of which is shown in fig. 2, including:
a processor (processor)200 and a memory (memory)201, and may further include a communication interface (communication I interface) 202 and a bus 203. The processor 200, the communication interface 202 and the memory 201 can communicate with each other through the bus 203. The communication interface 202 may be used for information transfer. The processor 200 may call logic instructions in the memory 201 to execute the control method for increasing enthalpy of air make-up air of the air conditioner according to the above embodiment.
Furthermore, the logic instructions in the memory 201 may be stored in computer readable storage media when implemented in software functional units and sold or used as independent products.
The processor 200 executes the functional application and data processing by executing the program instructions/modules stored in the memory 201, namely, implements the control method for air conditioning air make-up enthalpy increase in the above method embodiment.
The memory 201 may include a program storage area that may store an operating system, application programs necessary for at least functions, and a data storage area that may store data created according to the use of the terminal device, etc.
Fig. 3 is a schematic structural diagram of an air conditioner provided in an embodiment of the present disclosure.
As shown in fig. 3, the disclosed embodiments further provide air conditioners, including:
the refrigerant circulation loop is formed by connecting an outdoor heat exchanger 11, an indoor heat exchanger 12, a throttling device 13 and a compressor 14 through refrigerant pipelines;
the ends of the air supply branches 21 and are communicated with an air supply port of the compressor 14, and the end is communicated with a gas-liquid separator 22 arranged between the indoor heat exchanger 12 and the outdoor heat exchanger 11;
the heating device 3 is arranged on the refrigerant liquid inlet pipeline of the gas-liquid separator 22 in the heating mode and is configured to heat the refrigerant flowing through the refrigerant liquid inlet pipeline;
and a control device (not shown in the figure) for air make-up enthalpy increase of the air conditioner is electrically connected with the control valve 23 and the heating device 3. Here, the control device for increasing enthalpy of air-conditioning make-up air is the control device shown in the foregoing embodiment.
The air conditioner adopting the structural design can control the heating operation of the liquid inlet refrigerant of the gas-liquid separator according to the air supply of the air conditioner to the compressor, so that the temperature and the flow rate of the branch refrigerant which is heated and becomes gaseous and is divided for air supply can be increased; and the mode of controlling the refrigerant flow of the refrigerant circulation loop and/or the air supply branch is matched with the heating operation of the liquid inlet refrigerant, so that the problem of poor actual heating auxiliary effect of the air supply mode adopted by the air conditioner is effectively solved. .
The disclosed embodiment also provides computer-readable storage media storing computer-executable instructions configured to perform the above method for air conditioning air enthalpy addition.
The disclosed embodiments also provide computer program products 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 method for air conditioner defrosting.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, where the computer software product is stored in storage media, and includes or more instructions to enable computer devices (which may be personal computers, servers, or network devices) to execute all or part of the steps of the method described in the embodiment of the present disclosure.
The above description and drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them, other embodiments may include structural, logical, electrical, procedural and other changes, embodiments merely represent possible changes unless explicitly claimed, individual components and functions are optional and the order of operations may vary, the scope of embodiments of the disclosure includes the full scope of the claims and all available equivalents of the claims, when used in this application, although the terms "", "second" and the like may be used in this application to describe elements without limitation to these terms, these terms are used only to distinguish elements from elements, for example, where no change in the meaning of the description is intended, the 2 element may be called the second element and, as such, the first, second, 84 element may be called the "464 element" if the term "includes or" includes "element", "may be used in this application" the singular or "includes" the same element "," may be used in this application, "may include" 966 element "and" may be used in the singular or "may be included" as "may be" when the term "includes" element "," 966 "includes" element, or "may be used in describing" element "a" in this application, "and" may be included in the singular or "a" element, may be included "and" a "or" may be used in describing "element" a "element" when the context includes "may indicate that" a "may be included in the context of the case" a "element, or" includes "element, or" a "element, a" may be included "element, may be included" or "a" may be used in the singular "a" element, or "a" element, or "may be included" in a "element, or" may be included "may be used in the context," unless otherwise "a" may be used in a "in this application, a" element, or "in a" element, or "may be used in a" element, a "in a" describing a "in a" element, a "in a" may be included "element, a" may indicate that "may be included" or "a" may be included in a "or" in a "or" a "element, a" in a "or" may be included "may be used in a" element, or "element, a" describing a "element, a" may be a "or" describing a "element, or" may be used in a "may be used in a" or "may be used in a" in.
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.
For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be only logical functional divisions, and in actual implementation, there may be other divisions, for example, multiple units or components may be combined or may be integrated into another systems, or features may be omitted or not executed.
The flowcharts and block diagrams in the figures may represent blocks, program segments, or portions of code which contain or more executable instructions for implementing specified logical functions, in some alternative implementations, the functions noted in the blocks may occur out of the order noted in the figures.
Claims (10)
1, A method for controlling air make-up enthalpy increase of an air conditioner, which is characterized by comprising the following steps:
under the condition that the air conditioner supplements air to the compressor, the liquid inlet refrigerant of the gas-liquid separator is controlled to be heated; the air supplement comprises that at least part of refrigerant of the refrigerant circulation loop is controlled to flow back to the compressor along the air supplement branch through the gas-liquid separator;
and controlling the refrigerant flow of the refrigerant circulation loop and/or the air supplementing branch according to the air return parameters.
2. The method as claimed in claim 1, wherein the controlling the refrigerant flow rate of the refrigerant circulation circuit and/or the air make-up branch according to the air return parameter comprises:
judging whether the air return parameters meet the air return refrigerant state conditions or not;
and controlling the refrigerant flow of the refrigerant circulation loop and/or the air supplement branch according to the judgment result.
3. The control method according to claim 2, wherein the controlling a refrigerant flow rate of the refrigerant circulation circuit according to the determination result includes:
if the air-return parameter does not meet the air-return refrigerant state condition, obtaining the corresponding main path flow reduction value from the incidence relation, and adjusting the refrigerant flow of the refrigerant circulation loop according to the main path flow reduction value, or,
if the air return parameter meets the air return refrigerant state condition, acquiring a corresponding main path flow rate increase value from a second incidence relation; and adjusting the refrigerant flow of the refrigerant circulation loop according to the main path flow increase value.
4. The control method according to claim 2, wherein the controlling the refrigerant flow rate of the air make-up branch according to the determination result comprises:
if the return air parameter does not meet the return air refrigerant state condition, acquiring a corresponding branch flow increase value from a third correlation; adjusting the refrigerant flow of the air supply branch according to the branch flow increase value; alternatively, the first and second electrodes may be,
if the return air parameter meets the return air refrigerant state condition, acquiring a corresponding branch flow reduction value from a fourth incidence relation; and adjusting the refrigerant flow of the air supply branch according to the branch flow reduction value.
5. The control method according to claim 2,
the air return parameter comprises air return temperature, and the air return refrigerant state condition comprises: the return air temperature is greater than or equal to a return air temperature threshold value; alternatively, the first and second electrodes may be,
the air return parameter comprises air return pressure, and the air return refrigerant state condition comprises: the return air pressure is greater than or equal to the return air pressure threshold.
6. The control method of any of claims 1-5, further comprising:
and controlling the heating of the liquid inlet refrigerant of the gas-liquid separator according to the gas return parameters.
7. The control method according to claim 6, wherein the controlling of the heating of the feed refrigerant of the gas-liquid separator according to the return gas parameter comprises:
acquiring corresponding heating parameters from a fifth incidence relation according to the return air temperature;
controlling the heating according to the heating parameters.
8. The control method according to claim 6, characterized by further comprising:
and if the air supply exit condition is met, controlling to stop supplying air to the compressor, and controlling to reduce the heating parameter of the heating.
A control device for enthalpy addition of air make-up air, comprising a processor and a memory storing program instructions, characterized in that the processor is configured to execute the control method for enthalpy addition of air make-up air according to any of claims 1 to 8 through when executing the program instructions.
10, air conditioner, characterized by that, includes:
the refrigerant circulating loop is formed by connecting an outdoor heat exchanger, an indoor heat exchanger, a throttling device and a compressor through refrigerant pipelines;
an end of the air supplement branch is communicated with an air supplement port of the compressor, and the end of the air supplement branch is communicated with an air-liquid separator arranged between the indoor heat exchanger and the outdoor heat exchanger;
the heating device is arranged on the refrigerant liquid inlet pipeline of the gas-liquid separator in the heating mode and is configured to heat the refrigerant flowing through the refrigerant liquid inlet pipeline;
the control device for enthalpy addition of air conditioning air make-up according to claim 9, electrically connected with the throttling device and the control valve.
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