CN112524687A - Control method, air conditioning system and computer storage medium - Google Patents
Control method, air conditioning system and computer storage medium Download PDFInfo
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- CN112524687A CN112524687A CN202011461032.3A CN202011461032A CN112524687A CN 112524687 A CN112524687 A CN 112524687A CN 202011461032 A CN202011461032 A CN 202011461032A CN 112524687 A CN112524687 A CN 112524687A
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- indoor unit
- air conditioning
- conditioning system
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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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
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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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
- F24F2130/00—Control inputs relating to environmental factors not covered by group F24F2110/00
- F24F2130/40—Noise
Abstract
The application discloses a control method, an air conditioning system and a computer storage medium. The control method is applied to an air conditioning system and comprises the following steps: detecting whether the air conditioning system is in an oil return mode; and in response to the air conditioning system being in the oil return mode, controlling the first throttling device to be closed, and controlling the control valve to be opened so as to enable the refrigerant flow to flow through the second flow path. In this way, the noise generated by the indoor unit in the oil return mode can be reduced.
Description
Technical Field
The present application relates to the field of air conditioning technologies, and in particular, to a control method, an air conditioning device, and a computer storage medium.
Background
The air conditioning system is provided with the natural convection type indoor unit, and the natural convection type indoor unit does not need to be provided with a fan, so that the noise of the indoor unit can be reduced, and the comfort requirement of a user on the noise is met. However, the indoor unit generates noise in the oil return mode.
Disclosure of Invention
The application provides a control method, air conditioning equipment and a computer storage medium, which aim to solve the technical problem that an indoor unit generates noise in an oil return mode.
In order to solve the technical problem, the application adopts a technical scheme that: a control method is provided. The control method is applied to an air conditioning system, the air conditioning system at least comprises a compressor, an outdoor unit and an indoor unit, the compressor provides a circularly flowing refrigerant flow between the outdoor unit and the indoor unit, the indoor unit is provided with a first flow path and a second flow path, the first flow path is provided with a first throttling device and a first heat exchanger, the second flow path is provided with a control valve, and the control method comprises the following steps:
detecting whether the air conditioning system is in an oil return mode;
and in response to the air conditioning system being in the oil return mode, controlling the first throttling device to be closed, and controlling the control valve to be opened so as to enable the refrigerant flow to flow through the second flow path.
In order to solve the above technical problem, another technical solution adopted by the present application is: an air conditioning system is provided. The air conditioning system at least comprises a compressor, an outdoor unit and an indoor unit, wherein the compressor provides a circularly flowing refrigerant flow between the outdoor unit and the indoor unit, the indoor unit is provided with a first flow path and a second flow path, the first flow path is provided with a first throttling device and a first heat exchanger, the second flow path is provided with a control valve, and the air conditioning system is used for realizing the steps of the control method.
In order to solve the above technical problem, another technical solution adopted by the present application is: an air conditioning system is provided. The air conditioning system comprises a processor and a memory; the memory has stored therein a computer program, and the processor is configured to execute the computer program to implement the steps of the above-described control method.
In order to solve the above technical problem, another technical solution adopted by the present application is: a computer storage medium is provided. The computer storage medium stores program instructions that can be executed to implement the steps of the control method described above.
The control method is applied to an air conditioning system, the air conditioning system at least comprises a compressor, an outdoor unit and an indoor unit, the compressor provides a circularly flowing refrigerant flow between the outdoor unit and the indoor unit, the indoor unit is provided with a first flow path and a second flow path, the first flow path is provided with a first throttling device and a first heat exchanger, the second flow path is provided with a control valve, and the control method comprises the following steps: detecting whether the air conditioning system is in an oil return mode; and in response to the air conditioning system being in the oil return mode, controlling the first throttling device to be closed, and controlling the control valve to be opened so as to enable the refrigerant flow to flow through the second flow path. By the mode, when the air conditioning system is in the oil return mode, the first throttling device is controlled to be closed, the control valve is controlled to be opened, and the refrigerant flow flows through the second flow path and does not flow through the first flow path, namely the refrigerant flow does not flow through the first throttling device and the first heat exchanger, so that the noise generated by the indoor unit in the oil return mode can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of an air conditioning system of the present application;
FIG. 2 is a schematic view of the construction of the indoor unit of FIG. 1;
FIG. 3 is a flowchart illustrating a control method according to an embodiment of the present application
Fig. 4 is a pressure-enthalpy diagram of a refrigerant flow cycle of the indoor unit of fig. 1;
FIG. 5 is a schematic diagram of the evaporating temperature of the indoor unit of FIG. 1 as a function of natural convection heat dissipation;
FIG. 6 is a detailed flowchart of step S504 in FIG. 3;
FIG. 7 is a schematic structural diagram of another embodiment of an air conditioning system of the present application;
FIG. 8 is a schematic flow chart diagram of another embodiment of a control method of the present application;
FIG. 9 is a schematic flow chart diagram illustrating a control method according to yet another embodiment of the present application;
fig. 10 is a schematic view of the construction of the indoor unit of fig. 7;
FIG. 11 is a schematic structural diagram of yet another embodiment of an air conditioning system according to the present application;
FIG. 12 is a block diagram of an embodiment of an air conditioning system of the present application;
FIG. 13 is a schematic structural diagram of an embodiment of a computer storage medium according to the present application.
Wherein the correspondence between reference numbers and part names in fig. 1 to 11:
the air conditioning system 10, the compressor 11, the four-way valve 12, a connection port 121 of the four-way valve 12, a connection port 122 of the four-way valve 12, a connection port 123 of the four-way valve 12, a connection port 124 of the four-way valve 12, the outdoor unit 13, the indoor unit 14, the first throttling device 15, the first heat exchanger 147, the first sub-heat exchanger 141, the second sub-heat exchanger 142, the nozzle ejector 143, the first air intake 144, the second air intake 145, the air outlet 146, the set temperature Ts, the indoor temperature T1, the evaporation temperature T2A, the first preset temperature a, the second preset temperature b, the first preset evaporation temperature c, the second preset evaporation temperature d, the control valve 17, the liquid pipe 171, the air pipe 172, the gas-liquid separator 131, the oil separator 132, the third throttling device 16, the ordinary indoor unit 18, and the.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive step are within the scope of the present application.
The present application first proposes an air conditioning system, as shown in fig. 1, fig. 1 is a schematic structural diagram of an embodiment of the air conditioning system of the present application. The control method of the present application is applied to the air conditioning system 10. The air conditioning system 10 of the present embodiment may include a compressor 11, an outdoor unit 13, and an indoor unit 14, wherein the compressor 11 provides a circulating refrigerant flow between the outdoor unit 13 and the indoor unit 14.
The indoor unit 14 may be provided with a first throttling device 15 and a first heat exchanger 147, the first throttling device 15 is disposed between the outdoor unit 13 and the first heat exchanger 147 for regulating the refrigerant flow of the indoor unit 14, and for example, the first throttling device 15 is a first expansion valve.
Optionally, the air conditioning system 10 is further provided with a four-way valve 12, and the compressor 11 provides a refrigerant flow circulating between the outdoor unit 13 and the indoor unit 14 through the four-way valve 12.
The air conditioning system 10 has a cooling mode and a heating mode, and when the air conditioning system 10 is in the cooling mode, the path of the refrigerant flow is: compressor 11-connection port 121 of four-way valve 12-connection port 122 of four-way valve 12-outdoor unit 13-indoor unit 14-connection port 123 of four-way valve 12-connection port 124 of four-way valve 12-compressor 11, and outdoor unit 13 as a condenser.
When the air conditioning system 10 is in the heating mode, the path of the refrigerant flow: compressor 11-connection port 121 of four-way valve 12-connection port 123 of four-way valve 12-indoor unit 14-outdoor unit 13-connection port 122 of four-way valve 12-connection port 124 of four-way valve 12-compressor 11, and outdoor unit 13 as an evaporator.
The indoor unit 14 of the present application may be a natural convection type indoor unit, please refer to fig. 2, and fig. 2 is a schematic structural diagram of the indoor unit in fig. 1. The indoor unit 14 includes a first sub heat exchanger 141, a second sub heat exchanger 142, a nozzle ejector 143, a first air intake 144, a second air intake 145, and an air outlet 146, and the first heat exchanger 147 includes the first sub heat exchanger 141 and the second sub heat exchanger 142. The indoor unit 14 cools the indoor space through natural convection, at this time, the indoor return air stops entering the nozzle ejector 143 from the second air inlet 145, the indoor return air enters the indoor unit 14 from the first air inlet 144 to exchange heat with the first sub heat exchanger 141 and the second sub heat exchanger 142, the density of the air after heat exchange is increased, the air flows out of the indoor space from the air outlet 146 under the action of gravity, and the indoor hot air enters the indoor unit 14 in the form of return air to realize circulation. Since the indoor unit 14 does not need to be provided with a fan, noise can be reduced.
The air conditioning system 10 further includes a control mechanism (not shown) connected to the compressor 11, the four-way valve 12, the outdoor unit 13, the indoor unit 14, and the first throttling device 15, respectively, for controlling the operation of the compressor 11, the four-way valve 12, the outdoor unit 13, the indoor unit 14, and the first throttling device 15, respectively. The control mechanism of the present application includes a control chip and various circuits electrically connected to the control chip, such as a compressor circuit, a temperature control circuit, a protection circuit, and the like.
The present application further optimizes the following aspects based on the air conditioning system 10 described above:
air volume regulation
Referring to fig. 3, fig. 3 is a schematic flow chart of an embodiment of the control method of the present application. The control method of the present embodiment may be applied to the air conditioning system 10 described above. The control method of the embodiment comprises the following specific steps:
step S501: the set temperature Ts of the indoor unit 14 is acquired.
Before step S501, the control mechanism of the air conditioning system 10 may generate a control instruction through a touch action of the user, voice information, gesture information, or expression information, so as to control the air conditioning system 10 to enter different operation modes based on the control instruction, for example, control the air conditioning system 10 to enter a cooling mode.
The control method of the present embodiment is applied when the air conditioning system 10 is in the cooling mode, and therefore the step S501 may be: the set temperature of the indoor unit 14 is obtained in response to the air conditioning system 10 being in the cooling mode.
In order to make the indoor temperature meet the requirement of the user, the user may set the set temperature Ts according to the requirement of the user, so that the control mechanism of the air conditioning system 10 may obtain the set temperature Ts of the indoor unit 14. For example, the user sets a set temperature Ts for the indoor unit 14 via a remote control or other control device. In other embodiments, the air conditioning system 10 may also obtain the set temperature Ts of the indoor unit 14 from a server through the internet.
Step S502: the indoor temperature T1 and the evaporation temperature T2A of the indoor unit 14 are detected, respectively.
The air conditioning system 10 further includes a detecting mechanism (not shown) connected to the control mechanism for collecting the indoor temperature T1 and the evaporating temperature T2A of the indoor unit 14 under the control of the control mechanism.
As shown in fig. 1, the detection mechanism may include a first temperature sensor 102 and a second temperature sensor 101, and the first temperature sensor 102 is disposed in the room where the indoor unit 14 is located and is used for acquiring the indoor temperature T1 of the indoor unit 14. The second temperature sensor 101 is disposed at an inlet of the first heat exchanger 147 of the indoor unit 14, and is configured to detect a temperature of the two-phase refrigerant flow at the inlet of the first heat exchanger 147. Since the temperature of the two-phase refrigerant flow is in the two-phase region, and the temperature of the two-phase region corresponds to the pressure, the temperature collected by the second temperature sensor 101 is the evaporation temperature T2A of the indoor unit 14.
Referring to fig. 4, fig. 4 is a pressure-enthalpy diagram of a refrigerant flow cycle of the indoor unit of fig. 1. Wherein the abscissa of the pressure-enthalpy diagram represents enthalpy, and the ordinate of the pressure-enthalpy diagram represents pressure. The indoor temperature T1 is indicated by a broken line in the pressure-enthalpy diagram, line 31 of the pressure-enthalpy diagram indicates the condensation process of the indoor unit 14, line 32 of the pressure-enthalpy diagram indicates the compression process of the indoor unit 14, line 33 of the pressure-enthalpy diagram indicates the evaporation process of the indoor unit 14, and line 34 of the pressure-enthalpy diagram indicates the throttling process of the indoor unit 14. The first expansion device 15 is for expanding the refrigerant flow passing through the indoor unit 14, and the refrigerant flow exchanges heat with indoor air in the indoor unit 14, so that the evaporation temperature T2A of the indoor unit 14 is located between the lines 33 and 34 of the pressure-enthalpy diagram.
The control unit of the air conditioning system 10 controls the detection unit to detect the indoor temperature T1 of the indoor unit 14 and the evaporation temperature T2A of the indoor unit 14, respectively, that is, the control unit controls the first temperature sensor 102 to detect the indoor temperature T1 of the indoor unit 14 and controls the second temperature sensor 101 to detect the evaporation temperature T2A of the indoor unit 14. The detection mechanism feeds back the indoor temperature T1 and the evaporation temperature T2A to the control mechanism.
Step S503: the difference between the indoor temperature T1 and the set temperature Ts is calculated.
The control mechanism of the air conditioning system 10 calculates the difference between the indoor temperature T1 and the set temperature Ts to obtain a difference T1-Ts.
Step S504: based on the difference and the evaporation temperature T2A, the evaporation temperature T2A is adjusted to adjust the air volume of the indoor unit 14.
Referring to fig. 5, fig. 5 is a schematic diagram illustrating a relationship between an evaporation temperature and a natural convection heat dissipation of the indoor unit in fig. 1. The abscissa of fig. 5 represents the evaporation temperature T2A of the indoor unit 14, and the ordinate of fig. 5 represents the heat dissipation capacity of the indoor unit 14 by natural convection. A line 41 in fig. 5 indicates a relationship between the air volume of the indoor unit 14 and the evaporation temperature T2A of the indoor unit 14, and a line 42 in fig. 5 indicates a relationship between the heat dissipation capacity by natural convection of the indoor unit 14 and the evaporation temperature T2A of the indoor unit 14.
Based on the lines 41 and 42 in fig. 5, it can be found that: when the evaporation temperature T2A of the indoor unit 14 decreases, the larger the natural convection air volume of the indoor unit 14 is; when the evaporation temperature T2A of the indoor unit 14 decreases, the natural convection heat dissipation capability of the indoor unit 14 increases. Therefore, the present application can adjust the air volume of the indoor unit 14 by adjusting the evaporation temperature T2A of the indoor unit 14, thereby satisfying the indoor load.
The control mechanism of the air conditioning system 10 can adjust the evaporation temperature of the indoor unit 14 and thus the air volume of the indoor unit 14 based on the difference and the evaporation temperature T2A so that the indoor unit 14 satisfies the indoor load.
Different from the prior art, the evaporation temperature T2A of the indoor unit 14 can be adjusted according to the difference between the indoor temperature T1 of the indoor unit 14 and the set temperature Ts and the evaporation temperature T2A in the present embodiment, and since the evaporation temperature T2A is different, the air volume of the indoor unit 14 is different, and the heat dissipation capacity of the indoor unit 14 is also different, the air volume of the indoor unit 14 can be adjusted by adjusting the evaporation temperature T2A of the indoor unit 14 to meet the indoor load, and therefore, the air volume adjustment of the natural convection type indoor unit can be realized.
Specifically, the present embodiment may implement the step S504 by the method shown in fig. 6. Therefore, step S504 includes the steps of:
step S601: and comparing the difference value with a first preset temperature a and a second preset temperature b respectively, wherein the first preset temperature a is greater than the second preset temperature b.
The control mechanism of the air conditioning system 10 may be preset with a first preset temperature a and a second preset temperature b, wherein the first preset temperature a is greater than the second preset temperature b. Therefore, the control mechanism of the air conditioning system 10 compares the difference with the first preset temperature a and the second preset temperature b, respectively, i.e., T1-Ts with the first preset temperature a and the second preset temperature b, respectively. Since the air conditioning system 10 has a plurality of operating modes, the comfort requirement of the user may be different in each operating mode, and therefore the first preset temperature a and the second preset temperature b may also be different, and the control mechanism of the air conditioning system 10 may obtain the first preset temperature a and the second preset temperature b according to the current operating mode.
Wherein the first preset temperature a is greater than or equal to 4 ℃, and the first preset temperature a includes but is not limited to 4 ℃, 5 ℃ or 8 ℃; the second predetermined temperature b is less than or equal to 3 deg.C, and the second predetermined temperature b includes, but is not limited to, 1 deg.C, 2 deg.C, or 3 deg.C. For example, the first preset temperature a is 5 ℃ and the second preset temperature b is 3 ℃.
Step S602: the evaporation temperature T2A is compared with a first preset evaporation temperature c and a second preset evaporation temperature d, respectively, the first preset evaporation temperature c being greater than the second preset evaporation temperature d.
The control mechanism of the air conditioning system 10 may be preset with a first preset evaporating temperature c and a second preset evaporating temperature d, wherein the first preset evaporating temperature c is greater than the second preset evaporating temperature d. Therefore, the control mechanism of the air conditioning system 10 compares the evaporating temperature T2A with the first preset evaporating temperature c and the second preset evaporating temperature d, respectively.
Since the air conditioning system 10 has a plurality of operating modes, the comfort requirement of the user may be different in each operating mode, and therefore the first preset evaporating temperature c and the second preset evaporating temperature d may also be different, and therefore the control mechanism of the air conditioning system 10 may obtain the first preset evaporating temperature c and the second preset evaporating temperature d according to the current operating mode.
Wherein, the range of the first preset evaporation temperature c can be 3-6 ℃, and the first preset evaporation temperature c includes but is not limited to 3 ℃, 4 ℃ or 6 ℃; the second preset evaporating temperature d may range from 1 to 3 deg.C, and includes, but is not limited to, 1 deg.C, 2 deg.C, or 3 deg.C. For example, the first preset evaporating temperature c is 4 ℃ and the second preset evaporating temperature d is 3 ℃.
In response to the difference being greater than or equal to the second preset temperature b and less than or equal to the first preset temperature a, or the evaporating temperature T2A being greater than or equal to the second preset evaporating temperature d and less than or equal to the first preset evaporating temperature c, the control mechanism of the air conditioning system 10 maintains the evaporating temperature T2A of the air conditioning system 10 unchanged.
Step S603: in response to the difference being greater than the first preset temperature a and the evaporating temperature being greater than the first preset evaporating temperature c, the air conditioning system 10 is controlled to decrease the evaporating temperature T2A to increase the air volume of the indoor unit 14.
In response to the difference (T1-Ts) being greater than the first preset temperature a and the evaporating temperature T2A being greater than the first preset evaporating temperature c, the control mechanism of the air conditioning system 10 controls the air conditioning system 10 to decrease the evaporating temperature to increase the air volume of the indoor unit 14. For example, the control means further compares the evaporation temperature T2A with the first preset evaporation temperature c when the difference (T1-Ts) between the indoor temperature T1 and the set temperature Ts is greater than the first preset temperature a; when the control mechanism determines that the evaporation temperature T2A is greater than the first preset evaporation temperature c, the control mechanism controls the air conditioning system 10 to reduce the evaporation temperature T2A so as to increase the air volume of the indoor unit 14.
When the difference (T1-Ts) between the indoor temperature T1 and the set temperature Ts is greater than the first preset temperature a and the evaporation temperature T2A is greater than the first preset evaporation temperature c, the indoor load of the indoor unit 14 is greater and the outlet air temperature of the indoor unit 14 is high, so that the air conditioning system 10 needs to increase the air volume of the indoor unit 14 and decrease the evaporation temperature T2A.
As can be seen from the analysis of fig. 5, when the evaporation temperature T2A of the indoor unit 14 decreases, the larger the natural convection air volume of the indoor unit 14 is; when the evaporation temperature T2A of the indoor unit 14 decreases, the natural convection heat dissipation capability of the indoor unit 14 increases. Therefore, in the present embodiment, the air volume of the indoor unit 14 is adjusted by increasing the air volume of the indoor unit 14 by lowering the evaporation temperature T2A, and the indoor temperature can be quickly lowered while satisfying the indoor load.
Alternatively, the control mechanism of the air conditioning system 10 may be used to control the frequency of the compressor 11 to increase, and thus decrease the evaporating temperature T2A of the indoor unit 14 to increase the air volume of the indoor unit 14. In other embodiments, the control mechanism of the air conditioning system 10 may also control other components of the air conditioning system 10 to lower the evaporating temperature T2A of the indoor unit 14.
Step S604: in response to the difference being less than the second preset temperature b and the evaporating temperature T2A being less than the second preset evaporating temperature d, the air conditioning system 10 is controlled to increase the evaporating temperature T2A to decrease the air volume of the indoor unit 14.
When the difference (T1-Ts) between the indoor temperature T1 and the set temperature Ts is less than the second preset temperature b and the evaporation temperature T2A is less than the second preset evaporation temperature d, the indoor load of the indoor unit 14 is small, and at this time, the air outlet temperature of the indoor unit 14 is low, and the air volume of the indoor unit 14 needs to be reduced. Therefore, in response to the difference (T1-Ts) being less than the second preset temperature b and the evaporating temperature T2A being less than the second preset evaporating temperature d, the control mechanism of the air conditioning system 10 controls the air conditioning system 10 to increase the evaporating temperature T2A to decrease the air volume of the indoor unit 14.
For example, when the controller of the air conditioning system 10 determines that the difference (T1-Ts) between the indoor temperature T1 and the set temperature Ts is less than the second preset temperature b, the controller further compares the evaporation temperature T2A with the second preset evaporation temperature d; when the evaporation temperature T2A is determined to be less than the second preset evaporation temperature d, the control mechanism controls the air conditioning system 10 to increase the evaporation temperature to decrease the air volume of the indoor unit 14.
As can be seen from the analysis of fig. 5, when the indoor unit 14 increases the evaporation temperature T2A, the smaller the natural convection air volume of the indoor unit 14 is; when the indoor unit 14 increases the evaporation temperature T2A, the natural convection heat dissipation capability of the indoor unit 14 is weaker. Therefore, the present embodiment can reduce the air volume of the indoor unit 14 by increasing the evaporation temperature T2A of the indoor unit 14, which not only can satisfy the indoor small load requirement, but also can improve the problem that the air conditioning system 10 is frequently started and stopped or the room temperature is too low and uncomfortable.
Alternatively, the control mechanism of the air conditioning system 10 may control the frequency of the compressor 11 to be decreased so as to increase the evaporation temperature T2A of the indoor unit 14, thereby decreasing the air volume of the indoor unit 14.
Further, when the control mechanism determines that the difference (T1-Ts) is in other relationship with the first preset temperature a and the second preset temperature b, or determines that the evaporation temperature T2A is in other relationship with the first preset evaporation temperature c and the second preset evaporation temperature d, the air conditioning system 10 does not adjust the evaporation temperature T2A. For example, if the control unit determines that the difference (T1-Ts) between the indoor temperature T1 and the set temperature Ts is less than the first preset temperature a and the evaporation temperature T2A is greater than the first preset evaporation temperature c, the control unit controls the output of the indoor unit 14 to match the indoor load or the outlet air temperature is appropriate, and the evaporation temperature T2A is not adjusted. Or, the control mechanism judges that the difference (T1-Ts) between the indoor temperature T1 and the set temperature Ts is greater than the first preset temperature a and the evaporation temperature T2A is less than the first preset evaporation temperature c, and the control mechanism controls the output of the indoor unit 14 to be matched with the indoor load or the outlet air temperature to be proper and does not adjust the evaporation temperature T2A.
Alternatively, the air conditioning system 10 may include a plurality of indoor units 14, and each indoor unit 14 is provided with the first throttling device 15.
The control method is applied to the air conditioning system 10, and the set temperature Ts of the indoor unit 14 is obtained; respectively detecting the indoor temperature T1 and the evaporation temperature T2A of the indoor unit 14; calculating to obtain a difference value between the indoor temperature T1 and the set temperature Ts; based on the difference and the evaporation temperature T2A, the evaporation temperature T2A is adjusted to adjust the air volume of the indoor unit 14. In this way, the present application can adjust the evaporation temperature T2A of the indoor unit 14 according to the difference between the indoor temperature T1 of the indoor unit 14 and the set temperature Ts and the evaporation temperature T2A, and since the evaporation temperature T2A is different, the air volume of the indoor unit 14 is different, and the heat dissipation capacity of the indoor unit 14 is also different, the air volume of the indoor unit 14 can be adjusted by adjusting the evaporation temperature T2A of the indoor unit 14 to satisfy the indoor load, and thus, the air volume adjustment of the natural convection type indoor unit can be realized.
Return oil control
The compressor 11 is a core component of the air conditioning system 10, so ensuring the normal operation of the compressor 11 is one of the core problems to be considered in designing the air conditioning system 10. The compressor 11 needs to have a sufficient amount of oil to ensure lubrication of the internal components of the compressor 11 during operation, and the compressor 11 discharges gas while drawing out the refrigerant oil.
For some simpler air conditioning systems, such as household air conditioning systems, the oil in the exhaust gas can be separated back to the compressor 11 by an oil separator, the theoretical separation efficiency of which is 99%; or by a specific oil return procedure, mainly by bringing the oil back to the compressor 11 by return air.
For some more complex air conditioning systems 10, such as central air conditioning systems, various methods may be employed to return the oil: the oil in the exhaust gas is separated by the oil separator and returns to the compressor 11 through the oil return capillary tube, and the theoretical separation efficiency of the oil separator is 99 percent; because the pipeline of the central air-conditioning system is long and a large amount of oil can be attached to the pipe wall, the central air-conditioning system can realize oil return by a specific oil return program, and the oil is brought back to the compressor 11 by the high-speed flow of return air; the central air-conditioning system is provided with a gas-liquid separator for storing redundant refrigerants in the system, and the gas-liquid separator can deposit a certain amount of oil while storing the refrigerants, so that the oil deposited in the gas-liquid separator can be brought back to the compressor 11 through an oil return hole in the gas-liquid separator.
As shown in fig. 1, the throttling component of the indoor unit 14 is opened, that is, the first throttling device 15 is opened, so that the refrigerant flow passes through the indoor unit 14, and the oil of the indoor unit 14 is brought back to the compressor 11. When the refrigerant flow passes through the first throttling device 15, the pressure of the refrigerant flow is reduced to enter the two-phase region, so that the flow velocity of the refrigerant flow is increased, and the sound of flushing of the refrigerant flow is generated. Further, the first expansion device 15 is provided in the casing of the indoor unit 14, and therefore, the first expansion device 15 cannot be isolated from sound, and noise is generated.
In order to reduce the noise of the refrigerant flow when the indoor unit 14 returns oil, the present application proposes another air conditioning system based on the above-mentioned embodiment. The difference from the air conditioning system 10 shown in fig. 1 is that: as shown in fig. 7, the air conditioning system 10 of the present embodiment further includes a control valve 17. The indoor unit 14 includes a first flow path provided with the first expansion device 15 and the first heat exchanger 147, and a second flow path provided with the control valve 17.
The present application further provides a control method, as shown in fig. 8, fig. 8 is a schematic flowchart of another embodiment of the control method of the present application, and the control method of the present embodiment can be applied to the air conditioning system 10 shown in fig. 7 and 10. The control method of the embodiment specifically includes the following steps:
step S801: it is checked whether the air conditioning system 10 is in the oil return mode.
The control means can determine that the indoor unit 14 is a natural convection type indoor unit from information such as the ID number of the indoor unit 14, and the control means detects whether the air conditioning system 10 is in the oil return mode. At this time, the air conditioning system 10 may be in a cooling mode or a heating mode, i.e., the air conditioning system 10 is in an oil return mode in the cooling mode, or the air conditioning system 10 is in an oil return mode in the heating mode.
Step S802: in response to the air conditioning system 10 being in the oil return mode, the first throttling device 15 is controlled to be closed, and the control valve 17 is controlled to be opened, so that the refrigerant flow flows through the second flow path.
In response to the air conditioning system 10 being in the oil return mode, for example, if the control mechanism determines that the air conditioning system 10 is in the oil return mode, the control mechanism controls the first throttling device 15 to close and controls the control valve 17 to open, so that the refrigerant flows through the second flow path, and at this time, the first flow path is disconnected.
As can be seen from the above analysis, when the air conditioning system 10 is in the oil return mode, the first throttling device 15 of the indoor unit 14 is controlled to be closed and the control valve 17 is controlled to be opened, so that the refrigerant flow bypasses the control valve 17 of the indoor unit 14 and does not flow through the first throttling device 15 and the first heat exchanger 147 of the indoor unit 14, thereby preventing the noise generated by the refrigerant flow generated by the first throttling device 15 and the first heat exchanger 147 and reducing the noise generated by the indoor unit 14 in the oil return mode.
Alternatively, the first throttling device 15 and the control valve 17 are disposed outside the indoor unit 14, and the first heat exchanger 147 is disposed inside the indoor unit 14, so that the first throttling device 15 and the control valve 17 can be subjected to sound insulation treatment to further reduce noise generated by the indoor unit 14 in the oil return mode.
The present application further provides a control method, as shown in fig. 9, fig. 9 is a flowchart illustrating a control method according to another embodiment of the present application, and the control method according to the present embodiment can be applied to the air conditioning system 10 shown in fig. 7 and 11. The control method of the embodiment specifically includes the following steps:
step S901: it is checked whether the air conditioning system 10 is in the oil return mode.
Step S901 is similar to step S801 described above, and is not described here in detail.
Step S902: in response to the air conditioning system 10 being in the oil return mode, the first throttling device 15 is controlled to be closed, and the control valve 17 is controlled to be opened, so that the refrigerant flow flows through the second flow path.
Step S902 is similar to step S802 described above and is not described herein.
Step S903: in response to the air conditioning system 10 not being in the oil return mode, the first throttling device 15 is controlled to be opened, and the control valve 17 is controlled to be closed, so that the refrigerant flow flows through the first flow path.
The control mechanism determines that the air conditioning system 10 is not in the oil return mode, and the control mechanism controls the first throttling device 15 to be opened and controls the control valve 17 to be closed, so that the refrigerant flow flows through the first flow path, and the second flow path is disconnected.
In this embodiment, when the air conditioning system 10 is in the non-oil return mode, the refrigerant flow passes through the first flow path of the indoor unit 14, that is, the refrigerant flow passes through the first throttling device 15 and the first heat exchanger 147, so that the indoor unit 14 cools or heats the room.
The control method is applied to the air conditioning system 10 and comprises the following steps: detecting whether the air conditioning system 10 is in an oil return mode; in response to the air conditioning system 10 being in the oil return mode, the first throttling device 15 is controlled to be closed, and the control valve 17 is controlled to be opened, so that the refrigerant flow flows through the second flow path. In this way, when the air conditioning system 10 is in the oil return mode, the first throttling device 15 is controlled to be closed, and the control valve 17 is controlled to be opened, so that the refrigerant flow flows through the second flow path and does not flow through the first flow path, that is, the refrigerant flow does not flow through the first throttling device 15 and the first heat exchanger 147, and noise generated by the indoor unit 14 in the oil return mode can be reduced.
As shown in fig. 7, one end of the control valve 17 is connected between the first throttling device 15 and the outdoor unit 13, and the other end of the control valve 17 is connected between the indoor unit 14 and the four-way valve 12. Since the indoor unit 14 is a natural convection type indoor unit, when the air conditioning system 10 is in the oil return mode, the control mechanism of the control system 10 may control the first throttling device 15 to be closed and the control valve 17 to be opened, so that the refrigerant flow passes through the control valve 17, and does not need to pass through the first throttling device 15 and the first heat exchanger 147 of the indoor unit 14, which may reduce noise generated by the indoor unit 14 in the oil return mode.
Referring to fig. 10, fig. 10 is a schematic structural view of the indoor unit of fig. 7. The throttling component of the indoor unit 14 includes a first throttling device 15 and a control valve 17, wherein a liquid pipe 171 of the indoor unit 14 is connected with the outdoor unit 13, and a gas pipe 172 of the indoor unit 14 is connected with the four-way valve 12. Since the throttling component of the indoor unit 14 can be disposed outside the indoor unit 14, the air conditioning system 10 can be provided with a sound insulation module for performing sound insulation treatment on the throttling component, and the sound insulation module can be sound insulation cotton for wrapping the first throttling device 15 and the control valve 17, so as to perform sound insulation treatment on the first throttling device 15 and the control valve 17, and further reduce the noise of the indoor unit 14.
When the air conditioning system 10 is in the oil return mode, the refrigerant flow flows into the heat exchanger of the outdoor unit 13 through the compressor 110, and then flows into the indoor unit 14 through the piping; the control mechanism of the air conditioning system 10 controls the first throttling device 15 of the indoor unit 14 to be closed and the control valve 17 to be opened, so that the refrigerant flow bypasses the first heat exchanger 147 of the indoor unit 14 in the throttling part of the indoor unit 14, the throttling part can be subjected to sound insulation treatment, and the noise of the refrigerant flow of the throttling part can be avoided. Further, by controlling the control valve 17 and the first throttle device 15 so that the refrigerant flow does not pass through the indoor unit 14, noise of the refrigerant flow when the indoor unit 14 returns oil can be reduced.
Optionally, the control valve 17 of the present embodiment is a second throttling device, i.e. a second expansion valve, which can simplify the control and improve the control accuracy. Of course, in other embodiments, the control valve 17 may also be a solenoid valve to save costs.
In a specific application scenario of this embodiment, as shown in fig. 11, on the basis of the air conditioning system, the air conditioning system 10 of this embodiment further includes a gas-liquid separator 131, an oil separator 132, a third throttling device 16, and a common indoor unit 18. The ordinary indoor unit 18 is provided with a fourth throttling device 19 and a second heat exchanger connected with the fourth throttling device 19, one end of the third throttling device 16 is connected with the outdoor unit 13, and the other end of the third throttling device 16 is connected with the fourth throttling device 19, the first throttling device 15 and the control valve 17. That is, one end of the fourth throttling means 19 of the normal indoor unit 18 is connected between the third throttling means 16 and the first throttling means 15, and the other end of the fourth throttling means 19 is connected to the second heat exchanger of the normal indoor unit 18. The gas-liquid separator 131 and the oil separator 132 are provided between the compressor 11 and the four-way valve 12; the third throttling device 16 may be a third expansion valve, the fourth throttling device 19 may be a fourth expansion valve, and the third throttling device 16 is used for regulating the flow rate of the refrigerant flowing from the outdoor unit 13 to the indoor units 14 and the common indoor unit 18.
The common indoor unit 18 is different from the indoor unit 14, and the common indoor unit 18 may be provided with a fan 181 for adjusting the air volume of the common indoor unit 18. The indoor unit 14 is a natural convection type indoor unit, and a fan is not arranged in the indoor unit, so that air quantity is generated through natural convection of air, and fan noise is avoided because only the drainage air is used and the fan is not used for forced convection and heat dissipation.
The present application further provides an air conditioning system according to an embodiment, as shown in fig. 12, fig. 12 is a schematic diagram of an embodiment of an air conditioning system according to the present application. The air conditioning system 100 of the present embodiment includes a processor 110 and a memory 120, wherein the processor 110 is coupled to the memory 120; the memory 110 stores therein a computer program, and the processor 110 is configured to execute the computer program to implement the control method of the air conditioning system 10. The control method of this embodiment may refer to the control method of the above embodiment, and is not described herein again.
The present application further proposes a computer storage medium, as shown in fig. 13, the computer storage medium 80 of the present embodiment is used for storing the program instructions 810 of the above embodiment, and the program instructions 810 can be executed by the control method of the above embodiment. The program instructions 810 have been described in detail in the above method embodiments, and are not described in detail here.
The computer storage medium 80 of the embodiment may be, but is not limited to, a usb disk, an SD card, a PD optical drive, a removable hard disk, a high-capacity floppy drive, a flash memory, a multimedia memory card, a server, etc.
Different from the prior art, this application air conditioning system can adjust the evaporating temperature of indoor set according to the difference and the evaporating temperature of the indoor temperature of indoor set and settlement temperature, because of evaporating temperature is different, and the amount of wind of natural convection is different, and the ability of indoor set is also different, therefore this embodiment can adjust the amount of wind of natural convection type indoor set in order to satisfy the indoor load through adjusting the evaporating temperature of indoor set, consequently can realize that the amount of wind of natural convection type indoor set is adjustable.
Further, in the present application, when the air conditioning system 10 is in the oil return mode, the control valve 17 controls the refrigerant flow not to pass through the first heat exchanger 147, so that noise generated by the refrigerant flow in the indoor unit 14 can be reduced.
In addition, if the above functions are implemented in the form of software functions and sold or used as a standalone product, the functions may be stored in a storage medium readable by a mobile terminal, that is, the present application also provides a storage device storing program data, which can be executed to implement the method of the above embodiments, the storage device may be, for example, a usb disk, an optical disk, a server, etc. That is, the present application may be embodied as a software product, which includes several instructions for causing an intelligent terminal to perform all or part of the steps of the methods described in the embodiments.
In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, mechanism, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, mechanisms, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be viewed as implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device (e.g., a personal computer, server, network device, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions). For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory. The above description is only an embodiment of the present application, and not intended to limit the scope of the present application, and all equivalent mechanisms or equivalent processes performed by the present application and the contents of the appended drawings, or directly or indirectly applied to other related technical fields, are all included in the scope of the present application.
Claims (10)
1. A control method is characterized by being applied to an air conditioning system, wherein the air conditioning system at least comprises a compressor, an outdoor unit and an indoor unit, the compressor provides a circularly flowing refrigerant flow between the outdoor unit and the indoor unit, the indoor unit is provided with a first flow path and a second flow path, a first throttling device and a first heat exchanger are arranged on the first flow path, and a control valve is arranged on the second flow path, and the control method comprises the following steps:
detecting whether the air conditioning system is in an oil return mode;
and in response to the air conditioning system being in the oil return mode, controlling the first throttling device to be closed, and controlling the control valve to be opened so as to enable the refrigerant flow to flow through the second flow path.
2. The control method according to claim 1, characterized in that the control method further comprises:
and in response to the fact that the air conditioning system is not in the oil return mode, controlling the first throttling device to be opened, and controlling the control valve to be closed so as to enable the refrigerant flow to flow through the first flow path.
3. A control method according to claim 1 or 2, characterized in that the control valve is a second throttle device.
4. A control method according to claim 1 or 2, characterized in that the control valve is a solenoid valve.
5. An air conditioning system, characterized in that, the air conditioning system at least comprises a compressor, an outdoor unit and an indoor unit, the compressor provides a refrigerant flow circulating between the outdoor unit and the indoor unit, the indoor unit is provided with a first flow path and a second flow path, the first flow path is provided with a first throttling device and a first heat exchanger, the second flow path is provided with a control valve, the air conditioning system is used for realizing the steps of the control method according to any one of claims 1 to 4.
6. The air conditioning system of claim 5, wherein the first throttling device and the control valve are disposed outside the indoor unit and the first heat exchanger is disposed within the indoor unit.
7. The air conditioning system of claim 6, further comprising a sound dampening module for sound dampening the first flow restriction and the control valve.
8. The air conditioning system as claimed in any one of claims 5 to 7, further comprising:
a common indoor unit, the compressor providing a circulating refrigerant flow between the outdoor unit and the common indoor unit;
one end of the third throttling device is connected with the outdoor unit, the common indoor unit is provided with a fourth throttling device and a second heat exchanger connected with the fourth throttling device, and the other end of the third throttling device is connected with the fourth throttling device, the first throttling device and the control valve.
9. An air conditioning system, characterized in that the air conditioning system comprises a processor and a memory; the memory has stored therein a computer program for execution by the processor to carry out the steps of the control method according to any one of claims 1 to 7.
10. A computer storage medium, characterized in that the computer storage medium stores a computer program which, when executed, implements the steps of the control method according to any one of claims 1-7.
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