Air conditioner indoor unit, control method thereof, and air conditioner unit

Abstract

This invention discloses an air conditioner indoor unit and its control method, as well as an air conditioning unit. The indoor unit includes: an existing indoor unit, comprising at least: a first main board; wherein the first main board is in a power-off state; and a control component located outside the existing indoor unit, including a second main board, a second temperature sensor, and a second throttling element; wherein the second main board is connected to the second temperature sensor and the second throttling element, and is used to adjust the opening degree of the second throttling element according to the temperature detected by the second temperature sensor. This invention solves the problem of incompatibility between the outdoor unit of a multi-split air conditioner and indoor units of different brands during the upgrade of multi-split air conditioners in the prior art, significantly reducing the workload and cost of upgrading old multi-split air conditioner systems.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to an indoor air conditioning unit and its control method, and an air conditioning unit. Background Technology

[0002] After years of development, older commercial multi-split air conditioning systems have become significantly less efficient and reliable than modern systems. Many older systems on the market now require replacement.

[0003] Due to the complexity of multi-split air conditioning systems, when upgrading an old multi-split air conditioning system, replacing the indoor units requires damaging the owner's interior structure, and the project is extensive and costly. If the indoor units are to be retained, compatibility issues arise between the outdoor units and indoor units from different brands.

[0004] There is currently no effective solution to the incompatibility issue between the outdoor unit of a multi-split air conditioner and indoor units of different brands during the upgrade process of related technologies. Summary of the Invention

[0005] This invention provides an indoor air conditioner unit and its control method, as well as an air conditioning unit, to at least solve the problem of incompatibility between the outdoor unit of a multi-split air conditioner and indoor units of different brands during the upgrading of multi-split air conditioners in the prior art.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, an air conditioner indoor unit is provided, including: an existing air conditioner indoor unit, including at least: a first main board; wherein the first main board is in a power-off state; a control component 1, located outside the existing air conditioner indoor unit, including a second main board 2, a second temperature sensor and a second throttling element 3; wherein the second main board 2 is connected to the second temperature sensor and the second throttling element 3, and is used to adjust the opening degree of the second throttling element 3 according to the temperature detected by the second temperature sensor.

[0007] Furthermore, the original air conditioner indoor unit also includes: an indoor unit heat exchanger 4; a first throttling element 5 located on the liquid pipe 6 of the indoor unit heat exchanger 4; and a second main board 2 connected to the first throttling element 5 to control the first throttling element 5 to be at its maximum opening.

[0008] Furthermore, the second throttling element 3 is located on the liquid pipe 6 of the indoor unit heat exchanger 4. Further, the original air conditioner indoor unit also includes: a first inlet pipe temperature sensor 8, located on the liquid pipe 6 of the indoor unit heat exchanger 4, and between the first throttling element 5 and the indoor unit heat exchanger 4; a first outlet pipe temperature sensor 9, located on the gas pipe 7 of the indoor unit heat exchanger 4; the second temperature sensor includes: a second inlet pipe temperature sensor 10, located on the liquid pipe 6 of the indoor unit heat exchanger 4, and between the second throttling element 3 and the first throttling element 5; a second outlet pipe temperature sensor 11, located on the gas pipe 7 of the indoor unit heat exchanger 4; the second main board 2 is used to acquire the inlet pipe temperature detected by the second inlet pipe temperature sensor 10 and the outlet pipe temperature detected by the second outlet pipe temperature sensor 11.

[0009] Furthermore, the original air conditioner indoor unit also includes: a first ambient temperature sensor 12; the control component 1 also includes: a second ambient temperature sensor 13, used to detect the ambient temperature of the room where the original air conditioner indoor unit is located; the second main board 2 is also connected to the second ambient temperature sensor 13, used to obtain the ambient temperature.

[0010] Furthermore, the original air conditioner indoor unit also includes: motor 14; the second main board 2 is also connected to motor 14 and is used to control the operation of motor 14.

[0011] According to another aspect of the present invention, an air conditioner indoor unit control method is provided, applied to the air conditioner indoor unit as described above, comprising: acquiring the temperature detected by a second temperature sensor; and adjusting the opening degree of a second throttling element according to the temperature detected by the second temperature sensor.

[0012] Furthermore, the temperatures detected by the second temperature sensor include the inlet pipe temperature and the outlet pipe temperature; adjusting the opening of the second throttling element based on the temperatures detected by the second temperature sensor includes: determining the inlet and outlet pipe temperature difference of the indoor unit based on the inlet and outlet pipe temperatures; and adjusting the opening of the second throttling element based on the inlet and outlet pipe temperature difference.

[0013] Furthermore, adjusting the opening degree of the second throttling element based on the temperature difference between the inlet and outlet pipes includes: detecting the operating mode of the indoor unit of the air conditioner; when the operating mode is cooling mode, correcting the temperature difference between the inlet and outlet pipes, and adjusting the opening degree of the second throttling element based on the corrected temperature difference between the inlet and outlet pipes; when the operating mode is heating mode, adjusting the opening degree of the second throttling element based on the temperature difference between the inlet and outlet pipes.

[0014] Furthermore, the temperature difference between the inlet and outlet pipes is corrected, including: detecting the current operating capacity ratio of the indoor unit of the air conditioner and the system low pressure; determining a temperature correction value based on the current operating capacity ratio and / or the system low pressure; and correcting the temperature difference between the inlet and outlet pipes based on the temperature correction value; wherein, the corrected temperature difference between the inlet and outlet pipes = temperature difference between the inlet and outlet pipes - correction value.

[0015] Furthermore, the current operating capacity ratio is the ratio of the operating capacity of the indoor air conditioning unit to the operating capacity of all operating indoor air conditioning units; among which, the larger the current operating capacity ratio, the larger the temperature correction value; the higher the system low pressure, the larger the temperature correction value.

[0016] According to another aspect of the present invention, an air conditioning unit is provided, including the indoor unit as described above.

[0017] According to another aspect of the present invention, a storage medium containing computer-executable instructions is provided, which, when executed by a computer processor, are used to perform the air conditioner indoor unit control method as described above.

[0018] This invention proposes a novel indoor air conditioning unit. The original indoor unit's mainboard is de-energized, and new control components are added, such as a second mainboard, a second temperature sensor, and a second throttling element. The opening of the second throttling element is adjusted according to the control logic of the second mainboard and the temperature detected by the second temperature sensor, thereby controlling the indoor unit. Through this indoor unit compatibility solution, multi-split outdoor units can be compatible with indoor units of different brands. This eliminates the need for replacement or extensive disassembly of indoor units in older systems, allowing for direct use and significantly reducing the workload and cost of upgrading older multi-split systems. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an optional structure of an air conditioner indoor unit according to an embodiment of the present invention;

[0020] Figure 2 This is an optional flowchart of an air conditioner indoor unit control method according to an embodiment of the present invention; and

[0021] Figure 3 This is an optional schematic diagram of the pressure-enthalpy diagram according to Embodiment 2 of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Control component; 2. Second main board; 3. Second throttling element; 4. Indoor heat exchanger; 5. First throttling element; 6. Liquid pipe; 7. Gas pipe; 8. First inlet pipe temperature sensor; 9. First outlet pipe temperature sensor; 10. Second inlet pipe temperature sensor; 11. Second outlet pipe temperature sensor; 12. First ambient temperature sensor; 13. Second ambient temperature sensor; 14. Motor. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0025] Example 1

[0026] In a preferred embodiment 1 of the present invention, an indoor air conditioning unit is provided, specifically... Figure 1 This diagram illustrates one possible structural design of the indoor unit, such as... Figure 1 As shown, the indoor unit includes:

[0027] The existing air conditioner indoor unit includes at least: a first main board; wherein the first main board is in a power-off state;

[0028] The control component 1 is located outside the original air conditioner indoor unit and includes a second main board 2, a second temperature sensor and a second throttling element 3; wherein, the second main board 2 is connected to the second temperature sensor and the second throttling element 3 and is used to adjust the opening degree of the second throttling element 3 according to the temperature detected by the second temperature sensor.

[0029] In the above embodiments, a new type of indoor air conditioner unit is proposed. The original indoor unit's mainboard is de-energized, and new control components are added, such as a second mainboard 2, a second temperature sensor, and a second throttling element 3. The opening degree of the second throttling element 3 is adjusted according to the control logic of the second mainboard 2 and the temperature detected by the second temperature sensor, thereby achieving control of the indoor air conditioner unit. Through the indoor unit compatibility solution of this invention, multi-split outdoor units are compatible with indoor units of different brands. This allows older systems to use their indoor units directly without replacement or large-scale disassembly, significantly reducing the workload and cost of upgrading older multi-split systems.

[0030] like Figure 1 As shown, the original air conditioner indoor unit also includes: an indoor unit heat exchanger 4; a first throttling element 5, located on the liquid pipe 6 of the indoor unit heat exchanger 4; and a second main board 2, which is also connected to the first throttling element 5 to control the first throttling element 5 to its maximum opening. The original electronic expansion valve, when fully open, is essentially normally open and does not have a throttling function. The throttling function is mainly achieved by the second throttling element 3. The second throttling element 3 is located on the liquid pipe 6 of the indoor unit heat exchanger 4.

[0031] The original air conditioner indoor unit also includes: a first inlet pipe temperature sensor 8, located on the liquid pipe 6 of the indoor unit heat exchanger 4, and between the first throttling element 5 and the indoor unit heat exchanger 4; a first outlet pipe temperature sensor 9, located on the gas pipe 7 of the indoor unit heat exchanger 4; and a second temperature sensor corresponding to the original temperature sensor, such as... Figure 1 As shown, it includes: a second inlet pipe temperature sensor 10, located on the liquid pipe 6 of the indoor unit heat exchanger 4, and located between the second throttling element 3 and the first throttling element 5; a second outlet pipe temperature sensor 11, located on the gas pipe 7 of the indoor unit heat exchanger 4; and a second main board 2 for acquiring the inlet pipe temperature detected by the second inlet pipe temperature sensor 10 and the outlet pipe temperature detected by the second outlet pipe temperature sensor 11.

[0032] The original air conditioner indoor unit also includes: a first ambient temperature sensor 12; the control component 1 also includes: a second ambient temperature sensor 13, used to detect the ambient temperature of the room where the original air conditioner indoor unit is located; the second main board 2 is also connected to the second ambient temperature sensor 13, used to obtain the ambient temperature, so as to control the second throttling element 3 or other components according to the ambient temperature.

[0033] In addition to the above structure, the original indoor air conditioner unit also includes: a motor 14; the second main board 2 is also connected to the motor 14 to control its operation. The second main board 2 does not require an additional motor; it can be directly connected to the motor 14, and the motor speed feedback is obtained through on-site pulse width setting.

[0034] Based on the above, it can be determined that in this solution, the original main unit of the indoor unit is retained, while external control components for the indoor unit are added. Figure 1 Additional components include a mainboard, electronic expansion valve, and temperature sensor. The mainboard also includes control for the mainstream electronic expansion valve, with the original electronic expansion valve opening of the indoor unit set to maximum. The electronic expansion valve control on the mainboard can be set according to site requirements. All temperature sensors from the original indoor unit are discarded, such as... Figure 1 The old inlet pipe temperature sensor, old outlet pipe temperature sensor, and old ambient temperature sensor shown are controlled by a second temperature sensor.

[0035] The indoor unit compatibility solution described in this invention enables multi-split air conditioners to be compatible with indoor units of different brands, allowing older systems to be used directly without replacement of indoor units, significantly reducing the workload and cost of upgrading older multi-split air conditioner systems to newer systems.

[0036] Example 2

[0037] In a preferred embodiment 2 of the present invention, an air conditioner indoor unit control method is provided, applied to the air conditioner indoor unit in embodiment 1 above, specifically executed by a second mainboard. Specifically, Figure 2 An optional flowchart of the method is shown, such as Figure 2 As shown, the method includes the following steps S202-S204:

[0038] S202: Obtain the temperature detected by the second temperature sensor;

[0039] S204: Adjust the opening degree of the second throttling element according to the temperature detected by the second temperature sensor.

[0040] In the above embodiments, a new type of indoor air conditioner unit is proposed. The original indoor unit's mainboard is de-energized, and new control components are added, such as a second mainboard, a second temperature sensor, and a second throttling element. The opening degree of the second throttling element is adjusted according to the control logic of the second mainboard and the temperature detected by the second temperature sensor, thereby achieving control of the indoor air conditioner unit. Through the indoor unit compatibility solution of this invention, multi-split outdoor units are compatible with indoor units of different brands. This allows older systems to use their indoor units directly without replacement or large-scale disassembly, significantly reducing the workload and cost of upgrading older multi-split systems.

[0041] The temperatures detected by the second temperature sensor include the inlet pipe temperature and the outlet pipe temperature. Adjusting the opening of the second throttling element based on the temperatures detected by the second temperature sensor includes: determining the inlet and outlet pipe temperature difference of the indoor unit based on the inlet and outlet pipe temperatures; and adjusting the opening of the second throttling element based on the inlet and outlet pipe temperature difference.

[0042] Adjusting the opening of the second throttling element based on the temperature difference between the inlet and outlet pipes includes: detecting the operating mode of the indoor unit of the air conditioner; when the operating mode is cooling mode, correcting the temperature difference between the inlet and outlet pipes, and adjusting the opening of the second throttling element based on the corrected temperature difference between the inlet and outlet pipes; when the operating mode is heating mode, adjusting the opening of the second throttling element based on the temperature difference between the inlet and outlet pipes.

[0043] In heating mode, the temperature of the updated indoor unit's second inlet pipe temperature sensor is basically the same as that of the old inlet pipe temperature sensor, and the temperature of the second outlet pipe temperature sensor is also the same as that of the old outlet pipe temperature sensor. The difference is small, and the temperature difference between the indoor unit's inlet and outlet pipes does not need to be corrected.

[0044] In cooling mode, due to changes in the monitoring points for the inlet and outlet pipe temperatures of the indoor unit after the update, the monitored temperature values ​​may not accurately represent the inlet and outlet pipe temperatures, causing a change in the temperature difference between the inlet and outlet pipes. Therefore, the updated inlet and outlet pipe temperature difference needs to be corrected and used as a control variable for the indoor unit's electronic expansion valve. Specifically, this is achieved by judging the ratio of the current operating capacity of the indoor unit to the total operating capacity of all currently operating indoor units, as well as the system's low pressure, to correct the inlet and outlet pipe temperature difference. This method allows the same cooling effect to be achieved while maintaining the same outdoor unit control method for the indoor unit.

[0045] The specific correction scheme includes: detecting the current operation capacity ratio of the indoor unit of the air conditioner and the system low pressure; determining a temperature correction value according to the current operation capacity ratio and / or the system low pressure, and correcting the temperature difference between the inlet and outlet pipes according to the temperature correction value; wherein, the corrected temperature difference between the inlet and outlet pipes = the temperature difference between the inlet and outlet pipes - the correction value. Wherein, the current operation capacity ratio is the ratio of the operation capacity of the indoor unit of the air conditioner to the operation capacity of all turned-on indoor units of the air conditioner; wherein, the greater the current operation capacity ratio, the greater the temperature correction value; the greater the system low pressure, the greater the temperature correction value.

[0046] Because the temperature monitoring points of the inlet and outlet pipes of the indoor unit change after the update, the detected temperature value cannot accurately represent the temperature of the inlet and outlet pipes of the indoor unit. As can be seen from Figure 1 : There is a section of pipeline between the second outlet pipe temperature sensor and the old outlet pipe temperature sensor, and the temperatures of the two temperature sensors can be considered equal; there is an original electronic expansion valve or capillary between the second inlet pipe temperature sensor and the old inlet pipe temperature sensor, which will produce a throttling effect, resulting in a large temperature difference between the two temperature sensors, and the temperature of the second inlet pipe temperature sensor is higher than the temperature of the old inlet pipe temperature sensor. The temperatures of the second inlet pipe temperature sensor and the old inlet pipe temperature sensor are shown in the enthalpy-pressure diagram as Figure 3 shown. Point E in the enthalpy-pressure diagram is the temperature of the second inlet pipe temperature sensor, and point D is the temperature of the old inlet pipe temperature sensor. The temperature of point E will change due to the different refrigerant flow rates in the indoor unit.

[0047] The reasons for the change in the refrigerant flow rate in the indoor unit are the compressor frequency and the suction density of the compressor. The operating frequency of the compressor is related to the operating capacity of the indoor unit. The greater the current operation capacity / current total operation capacity of all turned-on indoor units, the greater the flow rate of the refrigerant through the electronic expansion valve of the indoor unit, resulting in greater resistance and a greater value that needs to be corrected. When the operating capacity of the indoor unit remains unchanged, the lower the system low pressure value, the smaller the suction density of the compressor, the smaller the refrigerant mass flow rate of the system, the smaller the temperature difference between the second inlet pipe temperature sensor and the old inlet pipe temperature sensor, and the smaller the correction of the temperature difference between the inlet and outlet pipes by the indoor unit. Therefore, the specific correction method for the temperature difference between the inlet and outlet pipes of the indoor unit is shown in the following table:

[0048] Table 1. Correction of the temperature difference between the inlet and outlet pipes of the indoor unit

[0049]

[0050] Wherein, A, B, C, D, E, F, G, H, J all represent positive values, and the magnitude relationship: A < B < C, D < E < F, G < H < J. a, b, c, d, e, f, h, i, j, k, m all represent positive values, and the magnitude relationship: a < b, c < d < e, f < h < i, j < k < m.

[0051] Example 3

[0052] Based on the air conditioner indoor unit provided in Embodiment 1 above, an air conditioning unit is also provided in a preferred embodiment 3 of the present invention, including the air conditioner indoor unit as described above.

[0053] In the above embodiments, a new type of indoor air conditioner unit is proposed. The original indoor unit's mainboard is de-energized, and new control components are added, such as a second mainboard, a second temperature sensor, and a second throttling element. The opening degree of the second throttling element is adjusted according to the control logic of the second mainboard and the temperature detected by the second temperature sensor, thereby achieving control of the indoor air conditioner unit. Through the indoor unit compatibility solution of this invention, multi-split outdoor units are compatible with indoor units of different brands. This allows older systems to use their indoor units directly without replacement or large-scale disassembly, significantly reducing the workload and cost of upgrading older multi-split systems.

[0054] Example 4

[0055] Based on the air conditioner indoor unit control method provided in Embodiment 1 above, in the preferred embodiment 4 of the present invention, a storage medium containing computer-executable instructions is also provided, which, when executed by a computer processor, is used to execute the air conditioner indoor unit control method as described above.

[0056] In the above embodiments, a new type of indoor air conditioner unit is proposed. The original indoor unit's mainboard is de-energized, and new control components are added, such as a second mainboard, a second temperature sensor, and a second throttling element. The opening degree of the second throttling element is adjusted according to the control logic of the second mainboard and the temperature detected by the second temperature sensor, thereby achieving control of the indoor air conditioner unit. Through the indoor unit compatibility solution of this invention, multi-split outdoor units are compatible with indoor units of different brands. This allows older systems to use their indoor units directly without replacement or large-scale disassembly, significantly reducing the workload and cost of upgrading older multi-split systems.

[0057] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not invented by the invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0058] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. An indoor unit for an air conditioner, characterized in that, include: The existing air conditioner indoor unit includes at least: a first main board; wherein the first main board is in a power-off state; The control component (1) is located outside the original air conditioner indoor unit and includes a second main board (2), a second temperature sensor and a second throttling element (3); wherein the second main board (2) is connected to the second temperature sensor and the second throttling element (3) and is used to adjust the opening degree of the second throttling element (3) according to the temperature detected by the second temperature sensor.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, The original air conditioning indoor unit also includes: Indoor heat exchanger (4); The first throttling element (5) is located on the liquid pipe (6) of the indoor heat exchanger (4); The second main board (2) is also connected to the first throttling element (5) for controlling the first throttling element (5) to be at its maximum opening.

3. The indoor unit of the air conditioner according to claim 2, characterized in that, The second throttling element (3) is located on the liquid pipe (6) of the indoor heat exchanger (4).

4. The indoor unit of the air conditioner according to claim 2, characterized in that, The original air conditioning indoor unit also includes: a first inlet pipe temperature sensing bulb (8), located on the liquid pipe (6) of the indoor unit heat exchanger (4), and located between the first throttling element (5) and the indoor unit heat exchanger (4); The first outlet temperature sensing bulb (9) is located on the gas pipe (7) of the indoor heat exchanger (4); The second temperature sensor includes: a second inlet temperature sensor (10), located on the liquid pipe (6) of the indoor heat exchanger (4), and located between the second throttling element (3) and the first throttling element (5); The second outlet temperature sensor (11) is located on the gas pipe (7) of the indoor heat exchanger (4); The second motherboard (2) is used to obtain the inlet temperature detected by the second inlet temperature sensor (10) and the outlet temperature detected by the second outlet temperature sensor (11).

5. The indoor unit of the air conditioner according to claim 1, characterized in that, The original air conditioning indoor unit also includes: a first ambient temperature sensing bulb (12); The control component (1) further includes: a second ambient temperature sensor (13), used to detect the ambient temperature of the room where the original air conditioner indoor unit is located; The second motherboard (2) is also connected to the second ambient temperature sensor (13) for obtaining the ambient temperature.

6. The indoor unit of the air conditioner according to claim 1, characterized in that, The original air conditioner indoor unit also includes: a motor (14); The second motherboard (2) is also connected to the motor (14) for controlling the operation of the motor (14).

7. An air conditioner indoor unit control method, applied to an air conditioner indoor unit as described in any one of claims 1-6, characterized in that, include: Obtain the temperature detected by the second temperature sensor; The opening of the second throttling element is adjusted according to the temperature detected by the second temperature sensor.

8. The method according to claim 7, characterized in that, The temperatures detected by the second temperature sensor include the inlet pipe temperature and the outlet pipe temperature; adjusting the opening of the second throttling element according to the temperatures detected by the second temperature sensor includes: determining the inlet and outlet pipe temperature difference of the indoor unit of the air conditioner according to the inlet pipe temperature and the outlet pipe temperature; and adjusting the opening of the second throttling element according to the inlet and outlet pipe temperature difference.

9. The method according to claim 8, characterized in that, Adjusting the opening of the second throttling element according to the temperature difference between the inlet and outlet pipes includes: Detect the operating mode of the indoor unit of the air conditioner; When the operating mode is cooling mode, the temperature difference between the inlet and outlet pipes is corrected, and the opening of the second throttling element is adjusted according to the corrected temperature difference between the inlet and outlet pipes. When the operating mode is heating mode, the opening degree of the second throttling element is adjusted according to the temperature difference between the inlet and outlet pipes.

10. The method according to claim 9, characterized in that, Correcting the temperature difference between the inlet and outlet pipes includes: Detect the current operating capacity ratio of the indoor unit of the air conditioner and the system low pressure; A temperature correction value is determined based on the current operating capacity ratio and / or the system low pressure, and the inlet and outlet pipe temperature difference is corrected based on the temperature correction value; wherein, the corrected inlet and outlet pipe temperature difference = inlet and outlet pipe temperature difference - the correction value.

11. The method according to claim 10, characterized in that, The current operating capacity ratio is the ratio of the operating capacity of the indoor air conditioner to the operating capacity of all the indoor air conditioners that are turned on; wherein, the larger the current operating capacity ratio, the larger the temperature correction value; the higher the system low pressure, the larger the temperature correction value.

12. An air conditioning unit, characterized in that, Including the indoor unit of an air conditioner as described in any one of claims 1 to 6.

13. A storage medium containing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, are used to perform the air conditioning indoor unit control method as described in any one of claims 7 to 11.

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