CN118208824A - Control method, control device, air conditioner and storage medium - Google Patents
Control method, control device, air conditioner and storage medium Download PDFInfo
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- CN118208824A CN118208824A CN202410457413.6A CN202410457413A CN118208824A CN 118208824 A CN118208824 A CN 118208824A CN 202410457413 A CN202410457413 A CN 202410457413A CN 118208824 A CN118208824 A CN 118208824A
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 238000005057 refrigeration Methods 0.000 claims abstract description 13
- 239000003507 refrigerant Substances 0.000 claims description 38
- 239000007788 liquid Substances 0.000 claims description 18
- 238000004590 computer program Methods 0.000 claims description 16
- 230000000737 periodic effect Effects 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 description 22
- 238000004364 calculation method Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
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Abstract
The application discloses a control method for an air conditioner. The air conditioner comprises an outdoor unit and an indoor unit, wherein the outdoor unit comprises a compressor, a first heat exchanger, a second heat exchanger, a first four-way valve and a second four-way valve, the indoor unit comprises a third heat exchanger and a fourth heat exchanger, the first heat exchanger, the third heat exchanger and the first four-way valve are connected with the compressor to form a first flow path, and the second heat exchanger, the fourth heat exchanger and the second four-way valve are connected with the compressor to form a second flow path. The control method comprises the steps of controlling the first four-way valve and the second four-way valve to work in a first state; and under the condition that the temperature difference between the indoor temperature and the preset temperature is smaller than or equal to a first preset value and the compressor operates at the minimum frequency, controlling the second four-way valve to be switched into a second state. Therefore, the state of the four-way valve in the second flow path is switched, so that the air conditioner can simultaneously perform refrigeration and heating to adjust the temperature difference between the indoor temperature and the preset temperature, periodic fluctuation of the indoor temperature can be avoided, and the comfort of a user is improved.
Description
Technical Field
The present application relates to the field of air conditioner control technology, and more particularly, to a control method, a control device, an air conditioner, and a nonvolatile computer readable storage medium.
Background
When a user purchases the air conditioner, the number of the air conditioners needs to be considered to be matched with the size of a room where the user needs to install the air conditioner, so that the purposes of achieving the best refrigerating or heating effect and saving energy consumption are achieved. However, when the user purchases the air conditioner, there is a case where the number of purchased air conditioners is greater than the number of air conditioners required for the room, so that the air conditioner still exceeds the load required for the room even if it works with the lowest frequency, resulting in that the room temperature does not meet the user's demand.
At present, for the condition that the number of air conditioners is larger than the number of rooms, the compressor of the air conditioner is unloaded and stopped, so that the temperature of the rooms meets the requirements of users. However, this method causes periodic fluctuations in room temperature, which cannot satisfy user comfort.
Disclosure of Invention
The embodiment of the application provides a control method, a control device, an air conditioner and a nonvolatile computer readable storage medium.
The control method is used for an air conditioner, the air conditioner comprises an outdoor unit and an indoor unit, the outdoor unit comprises a compressor, a first heat exchanger, a second heat exchanger, a first four-way valve and a second four-way valve, the indoor unit comprises a third heat exchanger and a fourth heat exchanger, the first heat exchanger, the third heat exchanger, the first four-way valve and the compressor are connected to form a first flow path, the second heat exchanger, the fourth heat exchanger, the second four-way valve and the compressor are connected to form a second flow path, and the control method comprises the steps of controlling the first four-way valve and the second four-way valve to work in a first state; and under the condition that the temperature difference between the indoor temperature and the preset temperature is smaller than or equal to a first preset value and the compressor operates at the minimum frequency, controlling the second four-way valve to be switched into a second state, under the condition that the indoor unit is in refrigeration and the first four-way valve and the second four-way valve operate in the first state, the first heat exchanger and the second heat exchanger are condensers, the third heat exchanger and the fourth heat exchanger are evaporators, under the condition that the indoor unit is in refrigeration and the second four-way valve operate in the second state, the second heat exchanger is an evaporator, under the condition that the indoor unit is in heating and the first four-way valve and the second four-way valve operate in the first state, the first heat exchanger and the second heat exchanger are evaporators, and under the condition that the indoor unit is in heating and the second four-way valve operate in the second state, the fourth heat exchanger is a condenser.
In this way, when the compressor of the air conditioner operates at the minimum frequency and the indoor temperature has a temperature difference from the preset temperature, the working state of the four-way valve in the second flow path is changed, so that the working mode of the second flow path in the air conditioner is opposite to the working mode of the first flow path, the indoor temperature can be adjusted through heating while the air conditioner excessively heats the indoor, or the indoor temperature can be adjusted through cooling while the air conditioner excessively heats the indoor, and the indoor temperature can be further enabled to trend to the preset temperature. Therefore, the compressor is not required to be controlled to unload and stop for adjusting the indoor temperature, so that the periodic fluctuation of the indoor temperature is avoided, and the comfort of a user is improved.
In some embodiments, the air conditioner includes a first valve and a second valve, the first valve connecting the compressor and the first four-way valve, the second valve connecting the compressor and the second four-way valve, the control method including controlling the opening of the first valve and the second valve to be a first opening before the step of controlling the second four-way valve to switch to the second state; the control method includes the steps of obtaining a temperature change rate of the indoor temperature after the temperature difference between the indoor temperature and a preset temperature is smaller than or equal to a first preset value and the compressor runs at a minimum frequency for a preset period of time after the step of controlling the second four-way valve to be in a second state, adjusting the opening of the second valve to be a second opening according to the temperature change rate, wherein the second opening is larger than the first opening under the condition that the temperature change rate is positive, and the second opening is smaller than the first opening under the condition that the temperature change rate is negative.
In this way, when the difference between the indoor temperature and the preset temperature is large, the flow rate of the refrigerant in the second flow path can be increased by adjusting the second valve to the second opening on the basis of the first opening, and the adjustment rate of the indoor temperature can be increased.
In some embodiments, the adjusting the opening of the second valve to a second opening according to the temperature change rate includes calculating a temperature difference between the indoor temperature and the preset temperature; calculating the temperature change rate of the indoor temperature according to the indoor temperature, the current indoor temperature and the preset time period which are different from the current time by a preset time period; and calculating the second opening of the second valve according to the temperature difference and the temperature change rate, wherein the second opening is in direct proportion to the temperature change rate when the temperature change rate is positive, and in inverse proportion to the temperature change rate when the temperature change rate is negative.
In this way, the change condition of the indoor temperature can be clearly known by calculating the temperature change rate of the indoor temperature after changing the working state of the second flow path, so that the adjustment rate of the indoor temperature can be improved by controlling the opening degree of the valve.
In some embodiments, the controlling method includes controlling the working state of the second four-way valve to be restored to the first state when the temperature difference between the indoor temperature and the preset temperature is greater than a second preset value after the step of adjusting the opening of the second valve to the second opening according to the temperature change rate, wherein the second preset value is greater than the first preset value.
Therefore, under the condition that the indoor temperature is close to the preset temperature, the working state of the second four-way valve is restored to the first state, indoor temperature fluctuation caused by long-time simultaneous heating and cooling of the indoor temperature can be avoided, and the comfort of a user is improved.
In some embodiments, the control method includes controlling the opening degrees of the first valve and the second valve to be a first opening degree before the step of controlling the second four-way valve to be switched to the second state; the control method includes controlling the opening of the second valve to be a third opening when the temperature difference between the indoor temperature and the preset temperature is larger than a first preset value and smaller than a third preset value after the step of controlling the second four-way valve to be switched to the second state, wherein the third preset value is larger than the first preset value and smaller than the second preset value, and the third opening is smaller than the first opening; and after the compressor runs for a preset time period at the minimum frequency, acquiring the temperature change rate of the indoor temperature, and adjusting the opening of the second valve to be a fourth opening according to the temperature change rate, wherein the fourth opening is larger than the third opening under the condition that the temperature change rate is positive, and the fourth opening is smaller than the third opening under the condition that the temperature change rate is negative.
Therefore, when the temperature difference between the indoor temperature and the preset temperature is smaller, the opening of the second valve is preset to be adjusted, and then the second adjustment is performed according to the temperature change rate, so that the flow of the refrigerant in the second flow path can be accurately adjusted, the excessive adjustment of the opening of the second valve is avoided, and the temperature difference between the indoor temperature and the preset temperature is further enlarged.
In some embodiments, the control method includes controlling the working state of the second four-way valve to remain the same when the indoor unit is in a cooling mode, the temperature difference between the indoor temperature and the preset temperature is smaller than a second preset value, greater than a third preset value, and the compressor is operated at a minimum frequency, wherein the third preset value is greater than the first preset value and smaller than the second preset value; and under the condition that the indoor unit is in a heating mode, the temperature difference between the indoor temperature and the preset temperature is larger than or equal to a fourth preset value and smaller than a fifth preset value, and the compressor operates at the minimum frequency, controlling the working state of the second four-way valve to be kept as it is, wherein the fourth preset value is smaller than the fifth preset value.
Therefore, when the temperature difference between the indoor temperature and the preset temperature reaches a certain range, the four-way valve can be prevented from periodically switching the working state by maintaining the working state of the four-way valve, so that the temperature fluctuates.
The control device is used for an air conditioner, the air conditioner comprises an outdoor unit and an indoor unit, the outdoor unit comprises a compressor, a first heat exchanger, a second heat exchanger, a first four-way valve and a second four-way valve, the indoor unit comprises a third heat exchanger and a fourth heat exchanger, the first heat exchanger, the third heat exchanger, the first four-way valve and the compressor are connected to form a first flow path, and the second heat exchanger, the fourth heat exchanger, the second four-way valve and the compressor are connected to form a second flow path.
The control device comprises a first control module and a second control module. The first control module is used for controlling the first four-way valve and the second four-way valve to work in a first state; the second control module is configured to control the second four-way valve to switch to a second state when a temperature difference between an indoor temperature and a preset temperature is less than or equal to a first preset value and the compressor operates at a minimum frequency, the first heat exchanger and the second heat exchanger are condensers when the indoor unit is in refrigeration and the first four-way valve and the second four-way valve operate in the first state, the third heat exchanger and the fourth heat exchanger are evaporators when the indoor unit is in refrigeration and the second four-way valve operates in the second state, the second heat exchanger is an evaporator when the indoor unit is in refrigeration and the fourth heat exchanger is a condenser when the indoor unit is in heating and the first four-way valve and the second four-way valve operate in the first state, the first heat exchanger and the second heat exchanger are evaporators when the indoor unit is in heating and the second four-way valve operates in the second state, and the fourth heat exchanger is a condenser when the indoor unit is in heating and the second four-way valve operates in the second state.
The air conditioner comprises an indoor unit and an outdoor unit, wherein the outdoor unit comprises a compressor, a first heat exchanger, a second heat exchanger, a first four-way valve, a second four-way valve, a first flow path and a second flow path, and the indoor unit comprises a third heat exchanger and a fourth heat exchanger; a processor and a memory; and a computer program, wherein the computer program is stored in the memory and executed by the processor, the computer program comprising instructions for executing the control method of any one of claims 1 to 7.
In some embodiments, the air conditioner further comprises a gas-liquid separator, wherein in the first flow path, the refrigerant in the compressor flows into the compressor again after passing through a first valve, a first heat exchanger, a third heat exchanger and the gas-liquid separator, and in the second flow path, the refrigerant in the compressor flows into the compressor again after passing through a second valve, a second heat exchanger, a fourth heat exchanger and the gas-liquid separator, the first flow path and the second flow path are connected through nodes, and the refrigerant in the compressor flows into the first valve and the second valve respectively through nodes.
Therefore, by arranging two flow paths in the air conditioner, one of the flow paths can be used for adjusting the temperature difference under the condition that the temperature difference between the indoor temperature and the preset temperature is larger due to the fact that the number of the air conditioners is too large, and therefore the compressor is not required to be stopped and unloaded, periodic changes of the indoor temperature are avoided, and comfort of users is improved.
A non-transitory computer-readable storage medium containing a computer program that, when executed by a processor, causes the processor to execute the control method according to any one of the above embodiments of the present application.
Additional aspects and advantages of embodiments of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic view of an air conditioner according to some embodiments of the present application;
FIG. 2 is a schematic view of an air conditioner according to some embodiments of the present application;
FIG. 3 is a flow chart of a control method of some embodiments of the present application;
FIG. 4 is a flow chart of a control method of some embodiments of the application;
FIG. 5 is a flow chart of a control method of some embodiments of the present application;
FIG. 6 is a flow chart of a control method of some embodiments of the application;
FIG. 7 is a flow chart of a control method of certain embodiments of the present application;
FIG. 8 is a flow chart of a control method of some embodiments of the application;
FIG. 9 is a block diagram of a control device according to some embodiments of the present application;
FIG. 10 is a schematic diagram of the connection state of a non-transitory computer readable storage medium and a processor of some embodiments of the application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the embodiments of the present application and are not to be construed as limiting the embodiments of the present application.
Referring to fig. 1 to 3, a control method according to an embodiment of the present application is used for an air conditioner 100, the air conditioner 100 includes an outdoor unit 20 and an indoor unit 30, the outdoor unit 20 includes a compressor 21, a first heat exchanger 22, a second heat exchanger 23, a first four-way valve 24 and a second four-way valve 25, the indoor unit 30 includes a third heat exchanger 31 and a fourth heat exchanger 32, the first heat exchanger 22, the third heat exchanger 31, the first four-way valve 24 are connected with the compressor 21 to form a first flow path 40, the second heat exchanger 23, the fourth heat exchanger 32, the second four-way valve 25 are connected with the compressor 21 to form a second flow path 50, the control method includes:
Step 011: the first four-way valve 24 and the second four-way valve 25 are controlled to work in a first state;
Wherein, in the case that the indoor unit 30 is in refrigeration and the first and second four-way valves 24 and 25 are operated in the first state, the first and second heat exchangers 22 and 23 are condensers, the third and fourth heat exchangers 31 and 32 are evaporators, in the case that the indoor unit 30 is in heating and the first and second four-way valves 24 and 25 are operated in the first state, the first and second heat exchangers 22 and 23 are evaporators, the third and fourth heat exchangers 31 and 32 are condensers,
Step 012: controlling the second four-way valve 25 to be switched to the second state in the case that the temperature difference between the indoor temperature and the preset temperature is less than or equal to the first preset value and the compressor 21 is operated at the minimum frequency;
The second heat exchanger 23 is an evaporator, the fourth heat exchanger 32 is a condenser when the indoor unit 30 is cooling and the second four-way valve 25 is operating in the second state, and the second heat exchanger 23 is a condenser and the fourth heat exchanger 32 is an evaporator when the indoor unit 30 is heating and the second four-way valve 25 is operating in the second state.
In this way, in the case where the compressor 21 of the air conditioner 100 is operated at the minimum frequency and there is a temperature difference between the indoor temperature and the preset temperature, by changing the operation state of the four-way valve in the second flow path 50 such that the operation mode of the second flow path 50 in the air conditioner 100 is opposite to the operation mode of the first flow path 40, it is possible to make the air conditioner 100 excessively cool the indoor while adjusting the indoor temperature by heating, or it is possible to make the air conditioner 100 excessively heat the indoor while adjusting the indoor temperature by cooling, and thus it is possible to make the indoor temperature tend to the preset temperature. Therefore, there is no need to control the compressor 21 to unload and stop for adjusting the indoor temperature, so that the indoor temperature does not periodically fluctuate, and the comfort of users is improved.
The air conditioner 100 may be a direct expansion air conditioner 100, and the direct expansion air conditioner 100 is an air conditioner 100 in which a refrigerant directly exchanges heat with air to be treated. The air conditioner 100 includes the indoor unit 30 and the outdoor unit 20, the indoor unit 30 is installed in a room where cooling or heating is required, the outdoor unit 20 is installed in an environment where the outdoor unit 20 can circulate with the outside air, and the temperature of the room where the indoor unit 30 is located can be heated or cooled by gasifying and liquefying the refrigerant (for example, the refrigerant may be a working fluid for transferring heat energy and generating a freezing effect) in the indoor unit 30 and the outdoor unit 20.
The compressor 21, the first heat exchanger 22, the second heat exchanger 23, the first four-way valve 24 and the second four-way valve 25 in the air conditioner 100 are provided in the outdoor unit 20, the third heat exchanger 31 and the fourth heat exchanger 32 in the air conditioner 100 are provided in the indoor unit 30, and the first flow path 40 can be formed by sequentially entering the first four-way valve 24, the first heat exchanger 22 and the third heat exchanger 31 after the refrigerant flows out of the compressor 21, and the second flow path 50 can be formed by sequentially entering the second four-way valve 25, the second heat exchanger 23 and the fourth heat exchanger 32 after the refrigerant flows out of the compressor 21.
The air conditioner 100 further includes a processor 60, a memory 70, and a computer program 71, the processor 60 being capable of executing the computer program 71 containing instructions of the control method, the memory 70 being capable of storing the computer program 71 containing instructions of the control method.
Specifically, the processor 60 can acquire the frequency of the compressor 21, the operating states of the first and second four-way valves 24 and 25, and the indoor temperature and preset temperature of the air conditioner 100 when the air conditioner 100 is operated. The processor 60 can understand that the current air conditioner 100 works according to the frequency of the compressor 21, the indoor temperature and the preset temperature, and can understand that the air conditioner 100 is in a cooling or heating mode according to the working states of the first four-way valve 24 and the second four-way valve 25, and the indoor temperature can be obtained according to the temperature sensor 33 in the air conditioner 100.
The processor 60 can control the first state in which the first four-way valve 24 and the second four-way valve 25 operate according to the operation mode in which the air conditioner 100 is located. For example, in the case where the indoor unit 30 is in the cooling mode, the processor 60 can control the first states of the first four-way valve 24 and the second four-way valve 25 to be the power-off state; when the indoor unit 30 is heating, the processor 60 can control the first state of the first four-way valve 24 and the second four-way valve 25 to be the energized state. Thus, the working state of the four-way valve can be controlled according to the working mode condition of the indoor unit 30, so that the indoor temperature can quickly reach the preset temperature.
The processor 60 can control the second four-way valve 25 to switch to the second state in case that it detects that the temperature difference between the indoor temperature and the preset temperature is less than or equal to a first preset value (the first preset value needs to be adjusted according to the operation mode in which the air conditioner 100 is located, the first preset value may be-3 ℃, -4 ℃ or-5 ℃ in the cooling mode, etc., the first preset value is 3 ℃,4 ℃ or 5 ℃ in the heating mode, etc.) and the compressor 21 is operated at a minimum frequency (the minimum frequency needs to be determined according to the model of the air conditioner 100). It should be noted that the second state is opposite to the first state, if the first state is the power-on state, the second state is the power-off state; when the first state is the power-off state, the second state is the power-on state.
For example, in the case that the air conditioner 100 is in the cooling mode and the first preset value is-3 ℃, the processor 60 controls the second four-way valve 25 to be in the power-off mode, and the processor 60 can detect that the indoor temperature is 22 ℃, the preset temperature is 25 ℃, and calculate that the temperature difference is-3 ℃, at this time, the frequency of the compressor 21 of the air conditioner 100 is operated at the minimum frequency, and then the processor 60 can control the second four-way valve 25 to be switched from the power-off state to the power-on state; in the case that the air conditioner 100 is in the heating mode and the first preset value is 3 ℃, the processor 60 controls the second four-way valve 25 to be in the power-on mode, detects the indoor temperature to be 28 ℃, the preset temperature to be 25 ℃, calculates the temperature difference to be 3 ℃, and at this time, the frequency of the compressor 21 of the air conditioner 100 is operated at the minimum frequency, the processor 60 can control the second four-way valve 25 to be switched from the power-on state to the power-off state.
The first flow path 40 includes the first heat exchanger 22 and the third heat exchanger 31, the second flow path 50 includes the second heat exchanger 23 and the fourth heat exchanger 32, the first heat exchanger 22 and the second heat exchanger 23 are located in the outdoor unit 20, and the third heat exchanger 31 and the fourth heat exchanger 32 are located in the indoor unit 30. The heat exchangers of the indoor unit 30 and the outdoor unit 20 may be fin heat exchangers, and the first heat exchanger 22, the second heat exchanger 23, the third heat exchanger 31, and the fourth heat exchanger 32 may be formed by dividing different heat dissipation paths in the fin heat exchangers. For example, the fin heat exchanger of the outdoor unit 20 includes 12 heat dissipation channels, the first heat exchanger 22 includes 10 heat dissipation channels, and the second heat exchanger 23 includes 2 heat dissipation channels, so that the heat exchange area ratio of the first heat exchanger 22 to the second heat exchanger 23 is 5:1.
When the indoor unit 30 is cooling, the processor 60 can control the first heat exchanger 22 to be a condenser, the third heat exchanger 31 to be an evaporator, the second heat exchanger 23 to be a condenser, and the fourth heat exchanger 32 to be an evaporator. When the indoor unit 30 is heating, the processor 60 can control the first heat exchanger 22 to be an evaporator, the third heat exchanger 31 to be a condenser, the second heat exchanger 23 to be an evaporator, and the fourth heat exchanger 32 to be a condenser. The second flow path 50 needs to be switched according to the operation state of the second four-way valve 25.
In the case that the difference between the indoor temperature and the preset temperature is less than or equal to the first preset value and the compressor 21 is operated at the minimum frequency, the processor 60 can control the second four-way valve 25 to be switched to the second state and control the second heat exchanger 23 and the fourth heat exchanger 32 to be switched to the operation mode.
For example, when the indoor unit 30 is cooling and the second four-way valve 25 is switched to the second state, the processor 60 can control the first heat exchanger 22 to be a condenser, the third heat exchanger 31 to be an evaporator, the second heat exchanger 23 to be an evaporator, and the fourth heat exchanger 32 to be a condenser.
For another example, when the indoor unit 30 is heating and the second four-way valve 25 is switched to the second state, the processor 60 can control the first heat exchanger 22 to be an evaporator, the third heat exchanger 31 to be a condenser, the second heat exchanger 23 to be a condenser, and the fourth heat exchanger 32 to be an evaporator.
Referring to fig. 4, in some embodiments, the air conditioner 100 includes a first valve 26 and a second valve 27, the first valve 26 is connected to the compressor 21 and the first four-way valve 24, the second valve 27 is connected to the compressor 21 and the second four-way valve 25, and the control method includes, before the step of controlling the second four-way valve 25 to switch to the second state:
step 013: controlling the opening degrees of the first valve 26 and the second valve 27 to be the first opening degree;
The control method includes, after the step of controlling the second four-way valve 25 to switch to the second state:
Step 014: after the temperature difference between the indoor temperature and the preset temperature is less than or equal to the first preset value and the compressor 21 is operated at the minimum frequency for a preset period of time, the temperature change rate of the indoor temperature is obtained, the opening of the second valve 27 is adjusted to be a second opening according to the temperature change rate, the second opening is greater than the first opening under the condition that the temperature change rate is positive, and the second opening is smaller than the first opening under the condition that the temperature change rate is negative.
In this way, when the difference between the indoor temperature and the preset temperature is large, the flow rate of the refrigerant in the second flow path 50 can be increased by adjusting the second valve 27 to the second opening on the basis of the first opening, and the rate of adjustment of the indoor temperature can be increased.
Specifically, the air conditioner 100 further includes a first valve 26 and a second valve. Wherein a first valve 26 is provided on the first flow path 40 for connecting the compressor 21 and the first four-way valve 24, and a second valve 27 is provided on the second flow path 50 for connecting the compressor 21 and the second four-way valve 25. The first valve 26 and the second valve 27 may be electric ball valves, the flow rate of the refrigerant can be controlled by controlling the opening degree of the ball valves, and the flow direction of the refrigerant can be controlled by controlling the energization and the de-energization of the first four-way valve 24 and the second four-way valve 25.
Before controlling the second four-way valve 25 to switch to the second state, the processor 60 can control the opening degrees of the first valve 26 and the second valve 27 to be the first opening degrees (for example, the maximum opening degrees of the first valve 26 and the second valve 27 are 3600 pa, the minimum opening degrees are 600 pa, and the first opening degrees are 3000 pa).
After controlling the second four-way valve 25 to be switched to the second state and after the compressor 21 is operated for a preset period of time (the preset period of time may be 5 minutes, 10 minutes, etc.), the processor 60 needs to determine whether the temperature difference of the indoor temperature from the preset temperature is decreasing or increasing, so that it is necessary to determine the magnitude of the temperature change rate of the indoor temperature. The processor 60 compares the temperature difference between the indoor temperature and the preset temperature with the temperature difference between the indoor temperature and the preset temperature of the second four-way valve 25 operating in the first state, thereby calculating the temperature change rate of the indoor temperature in the preset time period, and adjusting the opening of the second valve 27 according to the temperature change rate, thereby adjusting the flow rate of the refrigerant and accelerating the rate of reducing the temperature difference.
When the calculated temperature change rate is a positive value, the second opening is larger than the first opening, that is, the opening of the second valve 27 needs to be increased; in the case where the temperature change rate is a negative value, the second opening degree is smaller than the first opening degree, that is, the opening degree of the second valve 27 needs to be reduced.
Referring to fig. 5, in certain embodiments, step 014: adjusting the opening of the second valve 27 to the second opening according to the temperature change rate includes:
step 0141: calculating the temperature difference between the indoor temperature and the preset temperature;
Step 0142: calculating the temperature change rate of the indoor temperature according to the indoor temperature, the current indoor temperature and the preset time period which are different from the current time by a preset time period;
Step 0143: the second opening of the second valve 27 is calculated based on the temperature difference and the temperature change rate, and is proportional to the temperature change rate in the case where the temperature change rate is a positive value, and inversely proportional to the temperature change rate in the case where the temperature change rate is a negative value.
In this way, by calculating the temperature change rate of the indoor temperature after changing the operation state of the second flow path 50, the change condition of the indoor temperature can be clearly understood, and thus the adjustment rate of the indoor temperature can be improved by controlling the opening degree of the valve.
Specifically, after the processor 60 controls the second four-way valve 25 to switch the operation state and the compressor 21 is operated for a preset period of time (the preset period of time may be 5 minutes, 10 minutes, etc.), it is necessary to determine whether the temperature difference between the indoor temperature and the preset temperature is decreasing and to determine the magnitude of the rate at which the temperature difference is decreasing so that the indoor temperature can rapidly reach the preset temperature.
The processor 60 can calculate the temperature difference between the indoor temperature and the preset temperature by acquiring the indoor temperature again, and thus can calculate the temperature change rate of the indoor temperature according to the temperature difference, and can adjust the opening of the second valve 27 according to the temperature change rate to adjust the flow rate of the refrigerant.
The calculation formula of the temperature change rate of the indoor temperature can be expressed as:
Wherein F v denotes a temperature change rate, t 1 denotes an indoor temperature at the current time, t 2 denotes an indoor temperature before a preset time period, and s denotes a preset time period.
The calculation formula of the opening of the second valve 27 in the cooling mode or the heating mode is different, and the calculation formula of the second opening of the second valve 27 in the cooling mode may be expressed as:
P＝-100(ΔT+Fv)；
the calculation formula of the second opening degree of the second valve 27 in the heating mode can be expressed as:
P＝100(ΔT+Fv)；
Where P represents the opening degree of the second valve 27 to be adjusted, Δt represents the temperature difference between the indoor temperature and the preset temperature at the current time, and F v represents the temperature change rate.
When the temperature change rate is a positive value, the second opening is proportional to the temperature change rate, that is, the larger the temperature change rate is, the larger the second opening is; in the case where the temperature change rate is a negative value, the second opening degree is inversely proportional to the temperature change rate, i.e., the smaller the temperature change rate is, the smaller the second opening degree is.
Referring to fig. 6, in some embodiments, the control method includes, after the step of adjusting the opening of the second valve 27 to the second opening according to the temperature change rate:
step 015: and under the condition that the temperature difference between the indoor temperature and the preset temperature is larger than a second preset value, controlling the working state of the second four-way valve 25 to be restored to the first state, wherein the second preset value is larger than the first preset value.
Thus, when the indoor temperature is close to the preset temperature, the working state of the second four-way valve 25 is restored to the first state, so that the indoor temperature fluctuation caused by long-time simultaneous heating and cooling of the indoor temperature can be avoided, and the comfort of a user is improved.
Specifically, after the opening degree of the second valve 27 is adjusted and the operation of the compressor 21 is continued for a certain period of time, the processor 60 detects that the difference between the indoor temperature and the preset temperature is greater than the second preset value (the second preset value may be-0.5 ℃, 0.6 ℃ or 0.7 ℃ in the cooling mode, etc., and the first preset value is 0.5 ℃, 0.6 ℃ or 0.7 ℃ in the heating mode, etc.), and controls the operation state of the second four-way valve 25 to be restored to the initial state.
For example, in the cooling mode, the processor 60 can control the operation states of the first and second four-way valves 24 and 25 to be changed from the on state to the off state in the case that the difference between the indoor temperature and the preset temperature is less than 0.5 ℃; in the heating mode, the processor 60 can control the operation states of the first four-way valve 24 and the second four-way valve 25 to be switched from the power-off state to the power-on state under the condition that the difference between the indoor temperature and the preset temperature is less than 0.5 ℃.
Referring to fig. 7, in some embodiments, the control method includes, before the step of controlling the second four-way valve 25 to switch to the second state:
Step 016: controlling the opening degrees of the first valve 26 and the second valve 27 to be the first opening degree;
The control method includes, after the step of controlling the second four-way valve 25 to switch to the second state:
Step 017: controlling the opening of the second valve 27 to be a third opening when the temperature difference between the indoor temperature and the preset temperature is larger than a first preset value and smaller than a third preset value, wherein the third preset value is larger than the first preset value and smaller than the second preset value, and the third opening is smaller than the first opening;
Step 018: after the temperature difference between the indoor temperature and the preset temperature is greater than the first preset value and less than the second preset value and the compressor 21 operates at the minimum frequency for a preset period of time, the temperature change rate of the indoor temperature is obtained, the opening of the second valve 27 is adjusted to be fourth according to the temperature change rate, the fourth opening is greater than the third opening under the condition that the temperature change rate is positive, and the fourth opening is smaller than the third opening under the condition that the temperature change rate is negative.
Thus, when the temperature difference between the indoor temperature and the preset temperature is smaller, the opening of the second valve 27 is preset to be adjusted, and then the second adjustment is performed according to the temperature change rate, so that the flow rate of the refrigerant in the second flow path 50 can be accurately adjusted, the excessive adjustment of the opening of the second valve 27 is avoided, and the temperature difference between the indoor temperature and the preset temperature is further enlarged.
Specifically, before controlling the second four-way valve 25 to switch to the second state, the processor 60 can control the opening degrees of the first valve 26 and the second valve 27 to be the first opening degrees (for example, the maximum opening degrees of the first valve 26 and the second valve 27 are 3600 pa, the minimum opening degrees are 600 pa, the first opening degrees are 3000 pa), and obtain the temperature difference between the indoor temperature and the preset temperature. Wherein, in case the temperature difference is greater than the first preset value and less than the third preset value (the third preset value may be-1 ℃, -1.1 ℃ or-1.2 ℃ in the cooling mode, etc.), the processor 60 controls the opening of the first valve 26 and the second valve 27 to be the third opening (the third opening may be 1500 pa or 1600 pa, etc.) in the heating mode, the first preset value is 1 ℃, 1.1 ℃ or 1.2 ℃ in the heating mode, etc.).
After controlling the second four-way valve 25 to be switched to the second state according to the current third opening degrees of the first valve 26 and the second valve 27 and controlling the compressor 21 to operate for a preset period of time (the preset period of time may be 5 minutes, 10 minutes, etc.), the processor 60 needs to determine whether the temperature difference of the indoor temperature from the preset temperature is decreasing or increasing, and thus needs to determine the magnitude of the temperature change rate of the indoor temperature. The processor 60 compares the temperature difference between the indoor temperature and the preset temperature with the temperature difference between the indoor temperature and the preset temperature of the second four-way valve 25 operating in the first state, thereby calculating the temperature change rate of the indoor temperature in the preset time period, and adjusting the fourth opening of the second valve 27 according to the temperature change rate, thereby adjusting the flow rate of the refrigerant.
Note that, in the case where the calculated temperature change rate is a positive value, the fourth opening is larger than the third opening, that is, the opening of the second valve 27 needs to be increased; in the case where the temperature change rate is a negative value, the fourth opening degree is smaller than the third opening degree, that is, the opening degree of the second valve 27 needs to be reduced.
Referring to fig. 8, in some embodiments, the control method includes:
step 019: when the indoor unit 30 is in the cooling mode, the temperature difference between the indoor temperature and the preset temperature is smaller than the second preset value and larger than the third preset value, and the compressor 21 operates at the minimum frequency, the working state of the second four-way valve 25 is controlled to be kept as it is, and the third preset value is larger than the first preset value and smaller than the second preset value;
Step 020: when the indoor unit 30 is in the heating mode, the temperature difference between the indoor temperature and the preset temperature is greater than or equal to a fourth preset value, less than a fifth preset value, and the compressor 21 is operated at the minimum frequency, the working state of the second four-way valve 25 is controlled to be maintained as it is, and the fourth preset value is less than the fifth preset value.
Therefore, when the temperature difference between the indoor temperature and the preset temperature reaches a certain range, the four-way valve can be prevented from periodically switching the working state by maintaining the working state of the four-way valve, so that the temperature fluctuates.
Specifically, the processor 60 needs to monitor the indoor temperature at all times, and calculate the temperature difference between the indoor temperature and the preset temperature, and control the operation of the air conditioner 100 according to the temperature difference. When the air conditioner 100 is in the cooling mode and the compressor 21 is operated at the minimum frequency, the processor 60 detects that the difference between the indoor temperature and the preset temperature is less than the second preset value (the second preset value may be-0.5 deg.c, -0.6 deg.c, or-0.7 deg.c, etc.) and greater than the third preset value (the third preset value may be-1 deg.c, -1.2 deg.c, or-1.4 deg.c, etc.), the operation state of the second four-way valve 25 can be controlled to remain unchanged.
For example, when the temperature difference between the indoor temperature and the preset temperature is within the temperature range of the second preset value and the third preset value, the current working state of the second four-way valve 25 is the energized state, and then the energized state of the second four-way valve 25 is continuously maintained, and the current working state of the second four-way valve 25 is the de-energized state, and then the de-energized state of the second four-way valve 25 is continuously maintained.
When the air conditioner 100 is in the heating mode and the compressor 21 is operated at the minimum frequency, the processor 60 detects that the difference between the indoor temperature and the preset temperature is greater than or equal to a fourth preset value (the fourth preset value may be 0.5 c, 0.6 c, 0.7 c, etc.) and less than a fifth preset value (the fifth preset value may be 1 c, 1.2 c, 1.4 c, etc.), the operation state of the second four-way valve 25 can be controlled to remain unchanged.
For example, when the temperature difference between the indoor temperature and the preset temperature is within the temperature range of the fourth preset value and the fifth preset value, the current working state of the second four-way valve 25 is the energized state, and then the energized state of the second four-way valve 25 is continuously maintained, and the current working state of the second four-way valve 25 is the de-energized state, and then the de-energized state of the second four-way valve 25 is continuously maintained.
Referring to fig. 9, a control device 10 according to an embodiment of the present application is used for an air conditioner 100. The air conditioner 100 includes an outdoor unit 20 and an indoor unit 30, the outdoor unit 20 includes a compressor 21, a first heat exchanger 22, a second heat exchanger 23, a first four-way valve 24 and a second four-way valve 25, the indoor unit 30 includes a third heat exchanger 31 and a fourth heat exchanger 32, the first heat exchanger 22, the third heat exchanger 31, the first four-way valve 24 are connected with the compressor 21 to form a first flow path 40, and the second heat exchanger 23, the fourth heat exchanger 32, the second four-way valve 25 are connected with the compressor 21 to form a second flow path 50.
The control device 10 comprises a first control module 11 and a second control module 12. The first control module 11 is used for controlling the first four-way valve 24 and the second four-way valve 25 to work in a first state; the second control module 12 is configured to control the second four-way valve 25 to switch to the second state when the temperature difference between the indoor temperature and the preset temperature is less than or equal to the first preset value and the compressor 21 is operated at the minimum frequency.
The control device 10 further comprises a third control module 13, where the third control module 13 is configured to control the opening degrees of the first valve 26 and the second valve 27 to be the first opening degrees; after the temperature difference between the indoor temperature and the preset temperature is less than or equal to the first preset value and the compressor 21 is operated at the minimum frequency for a preset period of time, the temperature change rate of the indoor temperature is obtained, and the opening of the second valve 27 is adjusted to the second opening according to the temperature change rate.
The third control module 13 is specifically configured to calculate a temperature difference between the indoor temperature and a preset temperature; calculating the temperature change rate of the indoor temperature according to the indoor temperature, the current indoor temperature and the preset time period which are different from the current time by a preset time period; the second opening of the second valve 27 is calculated based on the temperature difference and the rate of change of temperature.
The control device 10 further includes a fourth control module 14, where the fourth control module 14 is configured to control the working state of the second four-way valve 25 to be restored to the first state when the temperature difference between the indoor temperature and the preset temperature is greater than the second preset value.
The control device 10 further includes a fifth control module 15, where the fifth control module 15 is configured to control the opening degrees of the first valve 26 and the second valve 27 to be the first opening degrees; controlling the opening of the second valve 27 to be a third opening when the temperature difference between the indoor temperature and the preset temperature is larger than a first preset value and smaller than a third preset value, wherein the third preset value is larger than the first preset value and smaller than the second preset value, and the third opening is smaller than the first opening; after the temperature difference between the indoor temperature and the preset temperature is greater than the first preset value and less than the second preset value and the compressor 21 is operated at the minimum frequency for a preset period of time, the temperature change rate of the indoor temperature is obtained, and the opening of the second valve 27 is adjusted to be the fourth opening according to the temperature change rate.
The control device 10 further includes a sixth control module 16, where the sixth control module 16 is configured to control the working state of the second four-way valve 25 to be maintained when the indoor unit 30 is in the cooling mode, the temperature difference between the indoor temperature and the preset temperature is less than the second preset value, greater than the third preset value, and the compressor 21 is operated at the minimum frequency; in the case that the indoor unit 30 is in the heating mode, the temperature difference between the indoor temperature and the preset temperature is greater than or equal to the fourth preset value, less than the fifth preset value, and the compressor 21 is operated at the minimum frequency, the operation state of the second four-way valve 25 is controlled to be maintained as it is.
The control device 10 is described above in connection with the accompanying drawings from the perspective of functional modules, which may be implemented in hardware, instructions in software, or a combination of hardware and software modules. Specifically, each step of the method embodiment in the embodiment of the present application may be implemented by an integrated logic circuit of hardware in the processor 60 and/or an instruction in software form, and the steps of the method disclosed in connection with the embodiment of the present application may be directly implemented as a hardware encoding processor or implemented by a combination of hardware and software modules in the encoding processor. Alternatively, the software modules may be located in a well-established storage medium in the art such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 70, and the processor 60 reads the information in the memory 70, and in combination with its hardware, performs the steps of the method embodiments described above.
Referring again to fig. 1 and 2, an air conditioner 100 according to an embodiment of the present application includes an indoor unit 30 and an outdoor unit 20, the outdoor unit 20 includes a compressor 21, a first heat exchanger 22, a second heat exchanger 23, a first four-way valve 24, a second four-way valve 25, a first flow path 40 and a second flow path 50, and the indoor unit 30 includes a third heat exchanger 31 and a fourth heat exchanger 32; a processor 60 and a memory 70; and a computer program 71, wherein the computer program 71 is stored in the memory 70 and executed by the processor 60, the computer program 71 comprising instructions for performing any one of the control methods described above, and for brevity, will not be described in detail herein.
Referring to fig. 1, in some embodiments, the air conditioner 100 further includes a gas-liquid separator 28, in which the refrigerant in the compressor 21 flows back into the compressor 21 after passing through the first valve 26, the first heat exchanger 22, the third heat exchanger 31, and the gas-liquid separator 28 in the first flow path 40, and flows back into the compressor 21 after passing through the second valve 27, the second heat exchanger 23, the fourth heat exchanger 32, and the gas-liquid separator 28 in the second flow path 50, and the first flow path 40 and the second flow path 50 are connected by a node, and the refrigerant in the compressor 21 flows back into the first valve 26 and the second valve 27, respectively, through the node.
Specifically, the air conditioner 100 further includes a gas-liquid separator 28, and the gas-liquid separator 28 is configured to separate the gaseous refrigerant and the liquid lubricant oil, and return the refrigerant and the lubricant oil to the compressor 21. Wherein the gas-liquid separator 28 can connect the first flow path 40 and the second flow path 50. For example, when the air conditioner 100 is in the cooling mode, the first four-way valve 24 and the second four-way valve 25 are in the power-off state, the compressor 21 in the air conditioner 100 compresses the refrigerant into a high-temperature high-pressure gaseous refrigerant, the gaseous refrigerant passes through the first valve 26 and the first four-way valve 24, and the second valve 27 and the second four-way valve 25, and then flows into the condenser of the outdoor unit 20 in the first flow path 40 and the condenser of the outdoor unit 20 in the second flow path 50, respectively, to be condensed into a liquid refrigerant, and then the liquid refrigerant is sent into the evaporator in the indoor unit 30 in the first flow path 40 and the evaporator in the indoor unit 30 in the second flow path 50 to be vaporized, and finally the vaporized gaseous refrigerant flows into the compressor 21 through the gas-liquid separator 28 in the outdoor unit 20.
For example, when the air conditioner 100 is in the heating mode, the first four-way valve 24 and the second four-way valve 25 are in the energized state, the compressor 21 in the air conditioner 100 compresses the refrigerant into a high-temperature high-pressure gaseous refrigerant, the gaseous refrigerant passes through the first valve 26 and the first four-way valve 24, the second valve 27 and the second four-way valve 25, respectively, and then flows into the condenser of the indoor unit 30 in the first flow path 40 and the condenser of the indoor unit 30 in the second flow path 50, respectively, to be condensed into a liquid refrigerant, and then the liquid refrigerant is sent into the evaporator in the outdoor unit 20 in the first flow path 40 and the evaporator in the outdoor unit 20 in the second flow path 50 to be vaporized, and finally the vaporized gaseous refrigerant flows into the compressor 21 through the gas-liquid separator 28 in the outdoor unit 20.
The first flow path 40 and the second flow path 50 can be connected by a node, so that the refrigerant in the compressors 21 can flow into the first flow path 40 and the second flow path 50 respectively through the node, and the two compressors 21 do not need to be provided to compress the refrigerant respectively, thereby saving cost.
Referring to fig. 10, an embodiment of the present application further provides a computer readable storage medium 300, on which a computer program 310 is stored, where the computer program 310, when executed by the processor 320, implements the steps of the control method of any of the foregoing embodiments, which are not described herein for brevity.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The control method is used for an air conditioner and is characterized by comprising an outdoor unit and an indoor unit, wherein the outdoor unit comprises a compressor, a first heat exchanger, a second heat exchanger, a first four-way valve and a second four-way valve, the indoor unit comprises a third heat exchanger and a fourth heat exchanger, the first heat exchanger, the third heat exchanger, the first four-way valve and the compressor are connected to form a first flow path, and the second heat exchanger, the fourth heat exchanger, the second four-way valve and the compressor are connected to form a second flow path, and the control method comprises the following steps:
controlling the first four-way valve and the second four-way valve to work in a first state;
controlling the second four-way valve to switch to a second state under the condition that the temperature difference between the indoor temperature and the preset temperature is smaller than or equal to a first preset value and the compressor operates at a minimum frequency,
Under the condition that the indoor unit is in refrigeration and the first four-way valve and the second four-way valve work in the first state, the first heat exchanger and the second heat exchanger are condensers, the third heat exchanger and the fourth heat exchanger are evaporators,
When the indoor unit is in refrigeration and the second four-way valve is in the second state, the second heat exchanger is an evaporator, the fourth heat exchanger is a condenser,
When the indoor unit is in heating and the first four-way valve and the second four-way valve work in the first state, the first heat exchanger and the second heat exchanger are evaporators, the third heat exchanger and the fourth heat exchanger are condensers,
And under the condition that the indoor unit is in heating and the second four-way valve works in the second state, the second heat exchanger is a condenser, and the fourth heat exchanger is an evaporator.
2. The control method according to claim 1, wherein the air conditioner includes a first valve and a second valve, the first valve connects the compressor and the first four-way valve, the second valve connects the compressor and the second four-way valve, the control method includes, before the step of controlling the second four-way valve to switch to the second state:
Controlling the opening degrees of the first valve and the second valve to be a first opening degree;
the control method includes, after the step of controlling the second four-way valve to switch to the second state:
And after the temperature difference between the indoor temperature and the preset temperature is smaller than or equal to a first preset value and the compressor runs at the minimum frequency for a preset period of time, acquiring the temperature change rate of the indoor temperature, adjusting the opening of the second valve to be a second opening according to the temperature change rate, wherein the second opening is larger than the first opening under the condition that the temperature change rate is positive, and the second opening is smaller than the first opening under the condition that the temperature change rate is negative.
3. The control method according to claim 2, characterized in that the adjusting the opening of the second valve to the second opening according to the temperature change rate includes:
calculating the temperature difference between the indoor temperature and the preset temperature;
Calculating the temperature change rate of the indoor temperature according to the indoor temperature, the current indoor temperature and the preset time period which are different from the current time by a preset time period;
and calculating the second opening of the second valve according to the temperature difference and the temperature change rate, wherein the second opening is in direct proportion to the temperature change rate when the temperature change rate is positive, and in inverse proportion to the temperature change rate when the temperature change rate is negative.
4. The control method according to claim 2, characterized in that the control method includes, after the step of adjusting the opening of the second valve to a second opening in accordance with the temperature change rate:
and controlling the working state of the second four-way valve to be restored to a first state under the condition that the temperature difference between the indoor temperature and the preset temperature is larger than a second preset value, wherein the second preset value is larger than the first preset value.
5. The control method according to claim 4, characterized in that the control method includes, before the step of controlling the second four-way valve to switch to the second state:
Controlling the opening degrees of the first valve and the second valve to be a first opening degree;
the control method includes, after the step of controlling the second four-way valve to switch to the second state:
Controlling the opening of the second valve to be a third opening when the temperature difference between the indoor temperature and the preset temperature is larger than a first preset value and smaller than a third preset value, wherein the third preset value is larger than the first preset value and smaller than a second preset value, and the third opening is smaller than the first opening;
And after the compressor runs for a preset time period at the minimum frequency, acquiring the temperature change rate of the indoor temperature, and adjusting the opening of the second valve to be a fourth opening according to the temperature change rate, wherein the fourth opening is larger than the third opening under the condition that the temperature change rate is positive, and the fourth opening is smaller than the third opening under the condition that the temperature change rate is negative.
6. The control method according to claim 1, characterized in that the control method includes:
When the indoor unit is in a refrigeration mode, the temperature difference between the indoor temperature and the preset temperature is smaller than a second preset value and larger than a third preset value, and the compressor runs at the minimum frequency, the working state of the second four-way valve is controlled to be kept as it is, and the third preset value is larger than the first preset value and smaller than the second preset value;
And under the condition that the indoor unit is in a heating mode, the temperature difference between the indoor temperature and the preset temperature is larger than or equal to a fourth preset value and smaller than a fifth preset value, and the compressor operates at the minimum frequency, controlling the working state of the second four-way valve to be kept as it is, wherein the fourth preset value is smaller than the fifth preset value.
7. The utility model provides a controlling means for air conditioner, its characterized in that, air conditioner includes off-premises station and indoor set, the off-premises station includes compressor, first heat exchanger, second heat exchanger, first cross valve and second cross valve, the indoor set includes third heat exchanger and fourth heat exchanger, first heat exchanger the third heat exchanger first cross valve with the compressor is connected and is formed first flow path, the second heat exchanger the fourth heat exchanger the second cross valve with the compressor is connected and is formed the second flow path, controlling means includes:
The first control module is used for controlling the first four-way valve and the second four-way valve to work in a first state;
The second control module is configured to control the second four-way valve to switch to a second state when a temperature difference between an indoor temperature and a preset temperature is less than or equal to a first preset value and the compressor operates at a minimum frequency, the first heat exchanger and the second heat exchanger are condensers when the indoor unit is in refrigeration and the first four-way valve and the second four-way valve operate in the first state, the third heat exchanger and the fourth heat exchanger are evaporators when the indoor unit is in refrigeration and the second four-way valve operates in the second state, the second heat exchanger is an evaporator when the indoor unit is in refrigeration and the fourth heat exchanger is a condenser when the indoor unit is in heating and the first four-way valve and the second four-way valve operate in the first state, the first heat exchanger and the second heat exchanger are evaporators, the third heat exchanger and the fourth heat exchanger are condensers when the indoor unit is in heating and the second four-way valve operates in the second state and the fourth heat exchanger is in the condenser.
8. An air conditioner, comprising:
The indoor unit comprises a compressor, a first heat exchanger, a second heat exchanger, a first four-way valve, a second four-way valve, a first flow path and a second flow path, and the indoor unit comprises a third heat exchanger and a fourth heat exchanger;
a processor and a memory; and
A computer program, wherein the computer program is stored in the memory and executed by the processor, the computer program comprising instructions for performing the control method of any one of claims 1 to 7.
9. The air conditioner of claim 8, further comprising a gas-liquid separator, wherein in the first flow path, refrigerant in the compressor flows back into the compressor after passing through a first valve, a first heat exchanger, a third heat exchanger, and the gas-liquid separator, and wherein in the second flow path, refrigerant in the compressor flows back into the compressor after passing through a second valve, a second heat exchanger, a fourth heat exchanger, and the gas-liquid separator, the first flow path and the second flow path being connected by a node, and refrigerant in the compressor flows into the first valve and the second valve, respectively, through a node.
10. A non-transitory computer readable storage medium containing a computer program which, when executed by a processor, causes the processor to perform the control method of any one of claims 1 to 6.
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| CN202410457413.6A CN118208824A (en) | 2024-04-16 | 2024-04-16 | Control method, control device, air conditioner and storage medium |
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| CN202410457413.6A CN118208824A (en) | 2024-04-16 | 2024-04-16 | Control method, control device, air conditioner and storage medium |
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