Air conditioner indoor unit, air conditioning device, and air conditioner control method

Abstract

The present application provides an air conditioner indoor unit, an air conditioning device, and an air conditioner control method. The air conditioner indoor unit comprises: a housing, provided with an upper air inlet, a lower air inlet, a mounting cavity, a first air passing opening, a second air passing opening, an upper air outlet and a lower air outlet, wherein the first air passing opening is located above the second air passing opening; an air duct assembly, comprising an upper air outlet channel, a lower air outlet channel and an auxiliary air outlet channel, wherein the upper air outlet channel can be connected to and disconnected from the first air passing opening and the auxiliary air outlet channel, the lower air outlet channel can be connected to and disconnected from the second air passing opening and the auxiliary air outlet channel, and the auxiliary air outlet channel can be connected to and disconnected from the upper air outlet and the lower air outlet; and a heat exchange assembly, wherein the lower air inlet can be communicated with the upper air outlet channel and / or the lower air outlet channel by means of the mounting cavity, the upper air inlet can be communicated with the upper air outlet channel and / or the lower air outlet channel by means of the mounting cavity, and the upper air outlet channel and the lower air outlet channel are both located between the mounting cavity and the auxiliary air outlet channel. The present application solves the problem in the prior art that air conditioning devices affect the comfort of users in the refrigeration or heating process.

Description

Air conditioning indoor unit, air conditioning device and air conditioning control method

[0001] This application claims priority to the patent application filed with the State Intellectual Property Office of China on January 4, 2024, with application number 2024100186485 and application name titled "Air Conditioning Indoor Unit, Air Conditioning Device and Air Conditioning Control Method." Technical Field

[0002] The present application relates to the technical field of air conditioning devices, and more specifically, to an air conditioning indoor unit, an air conditioning device, and an air conditioning control method. Background Art

[0003] Currently, users have different requirements for cooling in warmer environments and heating in cooler environments. Cooling and heating requirements are further categorized into different scenarios: dynamic (when the air conditioner is running and the indoor temperature has not yet reached a stable state) and steady-state (when the air conditioner has been running for a while and the indoor temperature has stabilized).

[0004] Cooling needs in warm environments: In dynamic environments, users' head, back, chest, and calves are more sensitive to cold. Therefore, when the air conditioner is turned on, using cold air to cool the head, back, chest, and calves can help users feel more comfortable. In steady-state environments, direct cooling of the cold air can cause discomfort and distract users, leading to distraction and loss of focus. Long-term exposure to direct cold air can easily lead to various health problems, so users prefer not to have it blown directly onto their bodies.

[0005] Heating requirements for cold environments: In a dynamic environment, the user's head, thighs, calves and hands are more sensitive to thermal stimulation. Hot air provides local thermal stimulation to the user's head, back, chest, calves, etc., making the user more comfortable. In a steady-state environment, due to the rise of heat, the room temperature is clearly stratified, and most of the heat accumulates in the upper area of ​​the room, leaving the user's feet, which most need warmth, unheated.

[0006] In summary, traditional air conditioners have a relatively simple airflow pattern, with the same airflow pattern for both cooling and heating modes. The airflow direction is only changed by adjusting the sweeping or guide blades. However, due to the natural characteristics of air, hot air has a lower density and tends to rise, while cold air has a higher density and tends to sink. This leads to constant comfort issues during operation of existing air conditioners, such as "hot head and cold feet" during heating and "cold air blowing" during cooling.

[0007] Application Contents

[0008] The main purpose of the present application is to provide an air-conditioning indoor unit, an air-conditioning device and an air-conditioning control method to solve the problem in the prior art that the air-conditioning device affects the user's comfort during the cooling or heating process.

[0009] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an air-conditioning indoor unit is provided, comprising: a casing, having an upper air inlet, a lower air inlet, an installation cavity, a first air outlet, a second air outlet, an upper air outlet and a lower air outlet, the upper air inlet and the lower air inlet are both connected to the installation cavity, and the first air outlet is located above the second air outlet; an air duct assembly is arranged in the casing, the air duct assembly includes an upper air outlet channel, a lower air outlet channel and an auxiliary air outlet channel, the upper air outlet channel is connectable and disconnectable with the first air outlet, and is connectable and disconnectable with the auxiliary air outlet channel, the lower air outlet channel is connectable and disconnectable with the second air outlet, and is connectable and disconnectable with the auxiliary air outlet channel The auxiliary air outlet channel can be connected and disconnected with the upper air outlet and the lower air outlet; the heat exchange component is arranged in the installation cavity; wherein the lower air inlet can be connected with the upper air outlet channel through the installation cavity; or, the lower air inlet can be connected with the lower air outlet channel through the installation cavity; or, the lower air inlet can be connected with both the upper air outlet channel and the lower air outlet channel through the installation cavity; the upper air inlet can be connected with the upper air outlet channel through the installation cavity; or, the upper air inlet can be connected with the lower air outlet channel through the installation cavity; or, the upper air inlet can be connected with the upper air outlet channel and the lower air outlet channel through the installation cavity; the upper air outlet channel and the lower air outlet channel are both located between the installation cavity and the auxiliary air outlet channel.

[0010] Furthermore, the housing has a front panel and a rear panel that are arranged opposite to each other, and the auxiliary air outlet channel is arranged close to the front panel relative to the installation cavity.

[0011] Furthermore, a partition is provided in the casing, and the partition forms at least a portion of the channel wall of the upper air outlet channel, at least a portion of the channel wall of the lower air outlet channel, and at least a portion of the channel wall of the auxiliary air outlet channel.

[0012] Furthermore, the partition has a first partition gap, which is located between the upper air outlet channel and the auxiliary air outlet channel. The air duct assembly includes: a first auxiliary air duct switching mechanism, which can be movably arranged at the first partition gap to block or avoid the first partition gap, thereby controlling the on and off state of the upper air outlet channel and the auxiliary air outlet channel; wherein, when the first auxiliary air duct switching mechanism avoids the first partition gap, the upper air outlet channel is connected to the auxiliary air outlet channel; when the first auxiliary air duct switching mechanism blocks the first partition gap, the upper air outlet channel is disconnected from the auxiliary air outlet channel.

[0013] Furthermore, the partition also has a second partition gap, which is located between the lower air outlet channel and the auxiliary air outlet channel. The air duct assembly includes: a second auxiliary air duct switching mechanism, which can be movably arranged at the second partition gap to block or avoid the second partition gap, thereby controlling the on and off state of the lower air outlet channel and the auxiliary air outlet channel; wherein, when the second auxiliary air duct switching mechanism avoids the second partition gap, the lower air outlet channel is connected to the auxiliary air outlet channel; when the second auxiliary air duct switching mechanism blocks the second partition gap, the lower air outlet channel is disconnected from the auxiliary air outlet channel.

[0014] Furthermore, the air duct assembly also includes: a first switching mechanism, which can be movably arranged at the upper air outlet channel to block or avoid the first air outlet of the upper air outlet channel, thereby controlling the on-off state of the upper air outlet channel and the first air outlet.

[0015] Furthermore, the side wall of the upper air outlet channel has a first notch, and the first switching mechanism can be flipped in the upper air outlet channel, and the first switching mechanism has a first position for blocking the first notch and a second position for blocking the first air outlet; wherein, when the first switching mechanism is in the first position, the first air outlet is connected to the first air inlet; when the first switching mechanism is in the second position, the first air outlet is disconnected from the first air inlet, and the first air inlet is connected to the installation cavity.

[0016] Furthermore, when the first switching mechanism is in the second position, at least a portion of the first switching mechanism overlaps the partition plate, so that the first partition plate gap is located on a side of the first switching mechanism away from the first air outlet.

[0017] Furthermore, the air duct assembly also includes: a second switching mechanism, which can be movably arranged at the lower air outlet channel to block or avoid the second air outlet of the lower air outlet channel, thereby controlling the on-off state of the lower air outlet channel and the second air outlet.

[0018] Furthermore, the side wall of the lower air outlet channel has a second notch, and the second switching mechanism can be flipped in the lower air outlet channel, and the second switching mechanism has a third position for blocking the second notch and a fourth position for blocking the second air outlet; wherein, when the second switching mechanism is in the third position, the second air outlet is connected to the second air inlet; when the second switching mechanism is in the fourth position, the second air outlet is disconnected from the second air inlet, and the second air inlet is connected to the installation cavity.

[0019] Furthermore, when the second switching mechanism is in the fourth position, at least a portion of the second switching mechanism overlaps the partition plate, so that the second partition plate gap is located on a side of the second switching mechanism away from the second air outlet.

[0020] Furthermore, the air duct assembly also includes a fan arranged opposite to the heat exchange assembly, and the fan is arranged in the upper air outlet channel; or, the fan is arranged in the lower air outlet channel; or, fans are arranged in both the upper air outlet channel and the lower air outlet channel; wherein, there is one fan; or, there are multiple fans, and the multiple fans are arranged at intervals along the height direction of the casing.

[0021] Furthermore, when there are multiple fans, the multiple fans include a first fan and a second fan, the first fan is arranged in the upper air outlet channel, and the second fan is arranged in the lower air outlet channel; wherein, the first fan and the second fan can be selectively put into use.

[0022] Furthermore, there is one fan, and the air-conditioning indoor unit also includes: a control module, which is electrically connected to the fan, the first switching mechanism, the second switching mechanism, the first auxiliary air duct switching mechanism and the second auxiliary air duct switching mechanism, so as to control the start and stop status of the fan, the position of the first switching mechanism, the position of the second switching mechanism, the position of the first auxiliary air duct switching mechanism and the position of the second auxiliary air duct switching mechanism; wherein the air-conditioning indoor unit includes: a first upper air outlet mode, when the air-conditioning indoor unit is in the first upper air outlet mode, the control module controls the fan to start, controls the first switching mechanism to move to the first position, controls the second switching mechanism to move to the fourth position, controls the first auxiliary air duct switching mechanism to move to block the first partition gap and controls the second auxiliary air duct switching mechanism to avoid the second partition gap; a second upper air outlet mode, when the air-conditioning indoor unit is in the second upper air outlet mode, the control module controls the fan to start, controls the first switching mechanism to move to the first position, controls the second switching mechanism to move to the fourth position, controls the first auxiliary air duct switching mechanism to move to block the first partition gap and controls the second auxiliary air duct switching mechanism to avoid the second partition gap The switching mechanism moves to block the second partition gap; in the first downward air outlet mode, when the air-conditioning indoor unit is in the first downward air outlet mode, the control module controls the fan to start, controls the first switching mechanism to move to the second position, controls the second switching mechanism to move to the third position, controls the first auxiliary air duct switching mechanism to move to avoid the first partition gap, and controls the second auxiliary air duct switching mechanism to move to block the second partition gap; in the second downward air outlet mode, when the air-conditioning indoor unit is in the second downward air outlet mode, the control module controls the fan to start, controls the first switching mechanism to move to the second position, controls the second switching mechanism to move to the third position, controls the first auxiliary air duct switching mechanism to move to block the first partition gap, and controls the second auxiliary air duct switching mechanism to move to block the second partition gap; in the up-down air outlet mode, when the air-conditioning indoor unit is in the up-down air outlet mode, the control module controls the fan to start, controls the first switching mechanism to move to the first position, controls the second switching mechanism to move to the third position, controls the first auxiliary air duct switching mechanism to move to block the first partition gap, and controls the second auxiliary air duct switching mechanism to block the second partition gap.

[0023] Furthermore, when there are multiple fans, the multiple fans include a first fan and a second fan, the first fan is arranged in the upper air outlet channel, and the second fan is arranged in the lower air outlet channel; the air conditioner indoor unit also includes: a control module, the control module is electrically connected to the first fan, the second fan, the first switching mechanism, the second switching mechanism, the first auxiliary air duct switching mechanism and the second auxiliary air duct switching mechanism, so as to control the start and stop states of the first fan and the second fan, the position of the first switching mechanism, the position of the second switching mechanism, the position of the first auxiliary air duct switching mechanism and the position of the second auxiliary air duct switching mechanism; wherein, the air conditioner indoor unit The present invention relates to a novel air conditioner which is a kind of indoor air conditioner which is provided with a plurality of air conditioners and a plurality of auxiliary air ducts, and a plurality of auxiliary air ducts which are provided with a plurality of auxiliary air ducts and a plurality of auxiliary air ducts, and a plurality of auxiliary air ducts which are provided with a plurality of auxiliary air ducts and a plurality of auxiliary air ducts. The duct switching mechanism moves to block the first partition gap and controls the second auxiliary air duct switching mechanism to move to block the second partition gap; in the first down-air outlet mode, when the air-conditioning indoor unit is in the first down-air outlet mode, the control module controls the first fan and the second fan to start, controls the first switching mechanism to move to the second position, controls the second switching mechanism to move to the third position, controls the first auxiliary air duct switching mechanism to move to avoid the first partition gap and controls the second auxiliary air duct switching mechanism to move to block the second partition gap; in the second down-air outlet mode, when the air-conditioning indoor unit is in the second down-air outlet mode, the control module controls the second fan to start , control the first switching mechanism to move to the second position, control the second switching mechanism to move to the third position, control the first auxiliary air duct switching mechanism to move to block the first partition gap, and control the second auxiliary air duct switching mechanism to move to block the second partition gap; up and down air outlet mode, when the air-conditioning indoor unit is in the up and down air outlet mode, the control module controls the first fan and the second fan to start, controls the first switching mechanism to move to the first position, controls the second switching mechanism to move to the third position, controls the first auxiliary air duct switching mechanism to move to block the first partition gap, and controls the second auxiliary air duct switching mechanism to move to block the second partition gap.

[0024] According to another aspect of the present application, an air-conditioning device is provided, comprising an air-conditioning indoor unit and an air-conditioning outdoor unit connected by pipes; wherein the air-conditioning indoor unit is the air-conditioning indoor unit described above.

[0025] According to another aspect of the present application, an air conditioning control method is provided, which is applicable to the above-mentioned air conditioning indoor unit. The air conditioning control method includes: step S1: determining the heat exchange mode of the air conditioning indoor unit, where the heat exchange mode includes a cooling mode and a heating mode; step S2: determining whether the user has set the operating mode of the air conditioning indoor unit. If the user has not set the operating mode, obtaining the indoor temperature T 内 , Set temperature of air conditioner indoor unit T 设 and indoor temperature T 内 and set temperature T 设 The difference between them is △T; Step S3: Get the indoor temperature T according to the heat exchange mode 内 The operating mode of the air conditioner indoor unit is selected based on the relationship between the difference △T and the first preset temperature T1 or the second preset temperature T2, and the relationship between the difference △T and the first preset difference △T1 or the second preset difference △T2; wherein the operating modes include the first upper air outlet mode, the second upper air outlet mode, the first lower air outlet mode, the second lower air outlet mode and the upper and lower air outlet mode.

[0026] Furthermore, step S3 includes: if the air conditioner indoor unit is in cooling mode and the indoor temperature T 内 If the indoor temperature is greater than the first preset temperature T1 and the difference △T is greater than the first preset difference △T1, the air conditioner indoor unit is controlled to be in the up and down air outlet mode; if the indoor unit is in the cooling mode and the indoor temperature T 内 If the temperature is less than or equal to the first preset temperature T1 and the difference ΔT is less than or equal to the first preset difference ΔT1, the air conditioner indoor unit is controlled to be in the first upper air outlet mode or the second upper air outlet mode.

[0027] Furthermore, when the air conditioner indoor unit is in cooling mode and the indoor temperature is T 内 When the temperature is greater than the first preset temperature T1 and the difference ΔT is greater than the first preset difference ΔT1, step S3 further includes: step S31: obtaining the temperature T of the lower air inlet of the air conditioner indoor unit 下回 , temperature T 下回 and set temperature T 设 The difference between △T 下回 ; Step S32: Determine the difference △T 下回 The relationship between the first temperature t1 and the second temperature t2 is used to adjust the operating mode and / or operating parameters of the air conditioner indoor unit, where the operating parameters include the speed of the fan and the operating frequency of the compressor.

[0028] Furthermore, step S32 includes: step S321: if the difference ΔT 下回 If the temperature difference ΔT is greater than the first temperature t1 and less than the second temperature t2, the air conditioner indoor unit is controlled to switch to the first upper air outlet mode or the second upper air outlet mode; Step S322: Continue to judge the difference ΔT 下回 The relationship between the first temperature t1 and the下回 If the temperature is less than or equal to the first temperature t1, the fan speed is reduced and / or the operating frequency of the compressor is lowered; Step S323: Continue to judge the difference △T 下回 The relationship between the second temperature t2, if the difference △T 下回 If the temperature is greater than or equal to the second temperature t2, the air conditioner indoor unit is controlled to continue operating in the first upper air outlet mode or the second upper air outlet mode.

[0029] Furthermore, in step S323, if the difference ΔT 下回 If the temperature is greater than or equal to the third temperature t3, the air-conditioning room is controlled to switch to the up and down air outlet mode; wherein the third temperature t3 is greater than the second temperature t2.

[0030] Furthermore, step S3 further includes: if the air conditioner indoor unit is in heating mode and the indoor temperature T 内 If the temperature is lower than the second preset temperature T2 and the difference △T is greater than the second preset difference △T2, the air conditioner indoor unit is controlled to be in the up and down air outlet mode; if the air conditioner indoor unit is in the heating mode and the indoor temperature T 内 If the temperature is greater than or equal to the second preset temperature T2 and the difference ΔT is less than or equal to the second preset difference ΔT2, the air conditioner indoor unit is controlled to be in the first down-flow mode or the second down-flow mode.

[0031] Furthermore, when the air conditioner indoor unit is in heating mode and the indoor temperature is T 内 When the temperature is less than the second preset temperature T2 and the difference ΔT is greater than the second preset difference ΔT2, step S3 further includes: step S33: obtaining the temperature T of the upper air inlet of the air conditioner indoor unit 上回 , temperature T 上回 and set temperature T 设 The difference between △T 上回 ; Step S34: Determine the difference △T 上回 The relationship between the fourth temperature t4 and the fifth temperature t5 is used to adjust the operation mode and / or operation parameters of the air-conditioning indoor unit, where the operation parameters include the speed of the fan and the operating frequency of the compressor.

[0032] Furthermore, step S34 includes: step S341: if the difference ΔT 上回 If the temperature difference ΔT is greater than the fourth temperature t4 and less than the fifth temperature t5, the air conditioner indoor unit is controlled to switch to the first down-flow mode or the second down-flow mode; Step S342: Continue to judge the difference ΔT 上回 and the fourth temperature t4, if the difference △T 上回 If the difference ΔT is less than or equal to the fourth temperature t4, the fan speed is reduced and / or the operating frequency of the compressor is lowered; Step S343: Continue to judge the difference ΔT 上回 and the fifth temperature t5, if the difference △T 上回If the temperature is greater than or equal to the fifth temperature t5, the air conditioner indoor unit is controlled to switch to the up and down air outlet mode.

[0033] Applying the technical solution of the present application, the indoor unit of the air conditioner includes a casing, an air duct assembly, and a heat exchange assembly. The casing has an upper air inlet, a lower air inlet, an installation cavity, a first air outlet, a second air outlet, an upper air outlet, and a lower air outlet. The upper air inlet and the lower air inlet are both connected to the installation cavity, and the first air outlet is located above the second air outlet. The air duct assembly is arranged in the casing and includes an upper air outlet channel, a lower air outlet channel, and an auxiliary air outlet channel. The upper air outlet channel is connectable and disconnectable with the first air outlet and the auxiliary air outlet channel, and the lower air outlet channel is connectable and disconnectable with the second air outlet and the auxiliary air outlet channel. The auxiliary air outlet channel is connectable and disconnectable with both the upper air outlet and the lower air outlet. The heat exchange assembly is arranged in the installation cavity. In this way, when the upper air outlet channel is connected to the first air outlet, the first air outlet serves as an air outlet. If the lower air outlet channel is connected to the auxiliary air outlet channel at this time, gas can also be discharged from the upper air outlet, that is, both the first air outlet and the upper air outlet can discharge air. When the upper air outlet channel is disconnected from the first air outlet, the first air outlet serves as an air inlet. If the upper air outlet channel is connected to the auxiliary air outlet channel at this time, gas can also be discharged from the lower air outlet, that is, both the second air outlet and the lower air outlet can discharge air. When the lower air outlet channel is connected to the second air outlet, the second air outlet serves as an air outlet. If the upper air outlet channel is connected to the auxiliary air outlet channel at this time, gas can also be discharged from the lower air outlet, that is, both the second air outlet and the lower air outlet can discharge air. When the lower air outlet channel is disconnected from the second air outlet, the second air outlet serves as an air inlet. If the lower air outlet channel is connected to the auxiliary air outlet channel at this time, gas can also be discharged from the upper air outlet, that is, both the upper air outlet and the first air outlet can discharge air. When the air conditioner is in cooling mode, the upper air outlet is connected to the first air outlet, which can also discharge air, so that cold air is delivered from the top and air is returned from the bottom. When the air conditioner is in heating mode, the lower air outlet is connected to the second air outlet, which can also discharge air, so that hot air is delivered from the bottom and air is returned from the top. This fundamentally solves the comfort problem of "hot head and cold feet" when the air conditioner is heating and "cold air blowing on people" when cooling. It also solves the problem of air conditioners affecting user comfort during cooling or heating in the existing technology, and improves the user experience. At the same time, the first and second air outlets can both serve as air inlets and outlets, thereby increasing the air intake or outlet volume of the air conditioner, not only achieving rapid cooling or heating of the air conditioner, but also realizing cooling and heating cycles throughout the house. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0035] FIG1 shows a cross-sectional view of an embodiment of an air conditioner indoor unit according to the present application in a first upper air outlet mode;

[0036] FIG2 shows a cross-sectional view of the air conditioner indoor unit in FIG1 in a second upper air outlet mode;

[0037] FIG3 shows a cross-sectional view of the air conditioner indoor unit in FIG1 in the first downward air outlet mode;

[0038] FIG4 shows a cross-sectional view of the air conditioner indoor unit in FIG1 in the second downward air outlet mode;

[0039] FIG5 shows a cross-sectional view of the air conditioner indoor unit in FIG1 in the up-down air outlet mode;

[0040] FIG6 shows an indoor air flow circulation diagram when the air conditioner indoor unit in FIG1 is in the first upper air outlet mode;

[0041] FIG7 shows an indoor air flow circulation diagram when the indoor unit of the air conditioner in FIG1 is in the first down-flow mode;

[0042] FIG8 shows a control flow chart of an embodiment of an air conditioning control method according to the present application when the air conditioning device is in cooling mode;

[0043] FIG9 shows a control flow chart of an embodiment of an air-conditioning control method according to the present application when the air-conditioning device is in a heating mode.

[0044] Among them, the above-mentioned drawings include the following figure marks: 10. casing; 11. upper air inlet; 12. lower air inlet; 13. installation cavity; 14. first air outlet; 15. second air outlet; 16. front panel; 17. rear panel; 18. upper air outlet; 19. lower air outlet; 20. upper air outlet channel; 21. first notch; 30. lower air outlet channel; 31. second notch; 40. heat exchange component; 50. fan; 51. first fan; 52. second fan; 60. first switching mechanism; 70. second switching mechanism; 80. auxiliary air outlet channel; 90. partition; 91. first partition notch; 92. second partition notch; 101. first auxiliary air duct switching mechanism; 102. second auxiliary air duct switching mechanism. DETAILED DESCRIPTION

[0045] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0047] In this application, unless otherwise specified, directional words such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit this application.

[0048] In order to solve the problem in the prior art that air-conditioning devices affect user comfort during cooling or heating, the present application provides an air-conditioning indoor unit, an air-conditioning device, and an air-conditioning control method.

[0049] As shown in Figures 1 to 7, the air conditioner indoor unit includes a housing 10, an air duct assembly, and a heat exchange assembly 40. The housing 10 has an upper air inlet 11, a lower air inlet 12, a mounting cavity 13, a first air passage 14, a second air passage 15, an upper air outlet 18, and a lower air outlet 19. The upper air inlet 11 and the lower air inlet 12 are both connected to the mounting cavity 13, and the first air passage 14 is located above the second air passage 15. The air duct assembly is disposed within the housing 10 and includes an upper air outlet duct 20, a lower air outlet duct 30, and an auxiliary air outlet duct 80. The upper air outlet duct 20 is connectable and disconnectable with the first air passage 14 and the auxiliary air outlet duct 80. The lower air outlet duct 30 is connectable and disconnectable with the second air passage 15 and the auxiliary air outlet duct 80. The auxiliary air outlet duct 80 is connectable and disconnectable with both the upper air outlet 18 and the lower air outlet 19. The heat exchange assembly 40 is disposed within the mounting cavity 13. The lower air inlet 12 can communicate with the upper air outlet duct 20 through the mounting cavity 13; alternatively, the lower air inlet 12 can communicate with the lower air outlet duct 30 through the mounting cavity 13; alternatively, the lower air inlet 12 can communicate with both the upper air outlet duct 20 and the lower air outlet duct 30 through the mounting cavity 13. The upper air inlet 11 can communicate with the upper air outlet duct 20 through the mounting cavity 13; alternatively, the upper air inlet 11 can communicate with the lower air outlet duct 30 through the mounting cavity 13; alternatively, the upper air inlet 11 can communicate with both the upper air outlet duct 20 and the lower air outlet duct 30 through the mounting cavity 13; both the upper air outlet duct 20 and the lower air outlet duct 30 are located between the mounting cavity 13 and the auxiliary air outlet duct 80.

[0050] By applying the technical solution of this embodiment, when the upper air outlet channel 20 is connected to the first air outlet 14, the first air outlet 14 is the air outlet. If the lower air outlet channel 30 is connected to the auxiliary air outlet channel 80 at this time, the gas can also be discharged from the upper air outlet 18, that is, both the first air outlet 14 and the upper air outlet 18 can discharge air; when the upper air outlet channel 20 is disconnected from the first air outlet 14, the first air outlet 14 is the air inlet. If the upper air outlet channel 20 is connected to the auxiliary air outlet channel 80 at this time, the gas can also be discharged from the lower air outlet 19, that is, both the second air outlet 15 and the lower air outlet 19 can discharge air. When the lower air outlet channel 30 is connected to the second air outlet 15, the second air outlet 15 is the air outlet. If the upper air outlet channel 20 is connected to the auxiliary air outlet channel 80 at this time, the gas can also be discharged from the lower air outlet 19, that is, both the second air outlet 15 and the lower air outlet 19 can discharge air; when the lower air outlet channel 30 is disconnected from the second air outlet 15, the second air outlet 15 is the air inlet. If the lower air outlet channel 30 is connected to the auxiliary air outlet channel 80 at this time, the gas can also be discharged from the upper air outlet 18, that is, both the upper air outlet 18 and the first air outlet 14 can discharge air. When the air conditioner is in cooling mode, the upper air outlet 20 is connected to the first air outlet 14, and the upper air outlet 18 can also discharge air, so that cold air is delivered from the top and air is returned from the bottom. When the air conditioner is in heating mode, the lower air outlet 30 is connected to the second air outlet 15, and the lower air outlet 19 can also discharge air, so that hot air is delivered from the bottom and air is returned from the top. This fundamentally solves the comfort problem of "hot head and cold feet" when the air conditioner is heating and "cold wind blowing on people" when cooling, and further solves the problem of air conditioners affecting user comfort during cooling or heating in the prior art, thereby improving the user experience. At the same time, the first air outlet 14 and the second air outlet 15 can both serve as air inlets and outlets, thereby increasing the air intake or air outlet volume of the air conditioner, not only achieving rapid cooling or heating of the air conditioner, but also achieving cooling and heating cycles throughout the house.

[0051] As shown in Figures 1 to 5, the housing 10 has a front panel 16 and a rear panel 17 disposed opposite each other, and the auxiliary air outlet duct 80 is disposed near the front panel 16 relative to the mounting cavity 13. Thus, the auxiliary air outlet duct 80 is located between the upper air outlet duct 20 and the front panel 16, and between the lower air outlet duct 30 and the front panel 16, making the internal structure layout of the air conditioner indoor unit more reasonable and compact, thereby improving the internal space utilization of the housing 10.

[0052] As shown in Figures 1 to 5 , a partition 90 is disposed within the housing 10. The partition 90 forms at least a portion of the channel wall of the upper air outlet duct 20, at least a portion of the channel wall of the lower air outlet duct 30, and at least a portion of the channel wall of the auxiliary air outlet duct 80. This arrangement facilitates and simplifies the formation of the auxiliary air outlet duct 80, reducing the cost and difficulty of manufacturing the air conditioner indoor unit.

[0053] As shown in Figure 3, the partition 90 has a first partition notch 91 located between the upper air outlet duct 20 and the auxiliary air outlet duct 80. The air duct assembly includes a first auxiliary air duct switching mechanism 101. The first auxiliary air duct switching mechanism 101 is movably disposed at the first partition notch 91 to block or avoid the first partition notch 91, thereby controlling the connection and disconnection between the upper air outlet duct 20 and the auxiliary air outlet duct 80. When the first auxiliary air duct switching mechanism 101 avoids the first partition notch 91, the upper air outlet duct 20 and the auxiliary air outlet duct 80 are connected; when the first auxiliary air duct switching mechanism 101 blocks the first partition notch 91, the upper air outlet duct 20 and the auxiliary air outlet duct 80 are disconnected. In this way, the connection and disconnection between the upper air outlet duct 20 and the auxiliary air outlet duct 80 can be controlled through the first auxiliary air duct switching mechanism 101, thereby enhancing the intelligence of the air conditioner indoor unit and reducing the difficulty of user control of the air conditioner indoor unit.

[0054] As shown in Figure 1, the partition 90 further has a second partition notch 92 located between the lower air outlet duct 30 and the auxiliary air outlet duct 80. The air duct assembly includes a second auxiliary air duct switching mechanism 102. The second auxiliary air duct switching mechanism 102 is movably disposed at the second partition notch 92 to block or avoid the second partition notch 92, thereby controlling the connection and disconnection between the lower air outlet duct 30 and the auxiliary air outlet duct 80. When the second auxiliary air duct switching mechanism 102 avoids the second partition notch 92, the lower air outlet duct 30 and the auxiliary air outlet duct 80 are connected; when the second auxiliary air duct switching mechanism 102 blocks the second partition notch 92, the lower air outlet duct 30 and the auxiliary air outlet duct 80 are disconnected. Thus, the second auxiliary air duct switching mechanism 102 can control the connection and disconnection between the lower air outlet duct 30 and the auxiliary air outlet duct 80, thereby enhancing the intelligence of the air conditioner indoor unit and reducing the difficulty of user control of the air conditioner indoor unit.

[0055] As shown in Figures 1 to 7 , the air duct assembly further includes a first switching mechanism 60. The first switching mechanism 60 is movably disposed on the upper air outlet duct 20 to block or avoid the first air outlet of the upper air outlet duct 20, thereby controlling the connection and disconnection between the upper air outlet duct 20 and the first air outlet 14. Thus, the connection and disconnection between the upper air outlet duct 20 and the first air outlet 14 can be controlled by the first switching mechanism 60, thereby enhancing the intelligence of the air conditioner indoor unit and reducing the difficulty of user control of the air conditioner indoor unit.

[0056] As shown in Figures 3 and 4, the side wall of the upper air outlet channel 20 has a first notch 21, and the first switching mechanism 60 is flippably arranged in the upper air outlet channel 20. The first switching mechanism 60 has a first position for blocking the first notch 21 and a second position for blocking the first air outlet; wherein, when the first switching mechanism 60 is in the first position, the first air outlet is connected to the first air outlet 14; when the first switching mechanism 60 is in the second position, the first air outlet is disconnected from the first air outlet 14, and the first air outlet 14 is connected to the installation cavity 13.

[0057] In this embodiment, when the first switching mechanism 60 is in the second position, at least a portion of the first switching mechanism 60 overlaps the partition plate 90, so that the first partition plate notch 91 is located on the side of the first switching mechanism 60 facing away from the first air outlet 14. Thus, when the first switching mechanism 60 blocks the first air outlet of the upper air outlet duct 20, the above-described arrangement of the first switching mechanism 60 avoids the first partition plate notch 91, thereby ensuring that the upper air outlet duct 20 can communicate with the auxiliary air outlet duct 80 through the first partition plate notch 91, thereby enabling air to be discharged from the lower air outlet 19, thereby increasing the air output of the air conditioner indoor unit and improving the operating efficiency of the air conditioner indoor unit.

[0058] As shown in Figures 1 to 7 , the air duct assembly also includes a second switching mechanism 70. The second switching mechanism 70 is movably disposed on the lower air outlet duct 30 to block or avoid the second air outlet of the lower air outlet duct 30, thereby controlling the connection and disconnection between the lower air outlet duct 30 and the second air outlet 15. Thus, the connection and disconnection between the lower air outlet duct 30 and the second air outlet 15 can be controlled by the second switching mechanism 70, thereby enhancing the intelligence of the air conditioner indoor unit and reducing the difficulty of user control of the air conditioner indoor unit.

[0059] As shown in Figures 1 and 2, the side wall of the lower air outlet channel 30 has a second notch 31, and the second switching mechanism 70 is flippably arranged in the lower air outlet channel 30. The second switching mechanism 70 has a third position for blocking the second notch 31 and a fourth position for blocking the second air outlet; wherein, when the second switching mechanism 70 is in the third position, the second air outlet is connected to the second air outlet 15; when the second switching mechanism 70 is in the fourth position, the second air outlet is disconnected from the second air outlet 15, and the second air outlet 15 is connected to the installation cavity 13.

[0060] In this embodiment, when the second switching mechanism 70 is in the fourth position, at least a portion of the second switching mechanism 70 overlaps the partition plate 90, so that the second partition plate notch 92 is located on the side of the second switching mechanism 70 facing away from the second air outlet 15. Thus, when the second switching mechanism 70 blocks the second air outlet of the lower air outlet duct 30, the aforementioned arrangement of the second switching mechanism 70 avoids the second partition plate notch 92, thereby ensuring that the lower air outlet duct 30 can communicate with the auxiliary air outlet duct 80 through the second partition plate notch 92, thereby enabling air to be discharged from the upper air outlet 18, thereby increasing the air output of the air conditioner indoor unit and improving the operating efficiency of the air conditioner indoor unit.

[0061] Optionally, the air duct assembly further includes a fan 50, positioned opposite the heat exchange assembly 40. The fan 50 is disposed within the upper air outlet duct 20; alternatively, the fan 50 is disposed within the lower air outlet duct 30; alternatively, fans 50 are disposed within both the upper air outlet duct 20 and the lower air outlet duct 30. There may be a single fan 50, or multiple fans 50, spaced apart along the height of the housing 10. In this manner, the fan 50 delivers the airflow after heat exchange in the heat exchange assembly 40 to the air outlet, thereby improving the reliability and stability of airflow from the air conditioner indoor unit. This arrangement also allows for greater flexibility in the number of fans 50, meeting varying usage requirements and operating conditions, and enhancing operational flexibility for personnel.

[0062] In this embodiment, there are two fans 50 , and the two fans 50 are spaced apart along the height direction of the housing 10 .

[0063] Optionally, when there are multiple fans 50, the multiple fans 50 include a first fan 51 and a second fan 52, with the first fan 51 being disposed within the upper air outlet duct 20 and the second fan 52 being disposed within the lower air outlet duct 30. The first fan 51 and the second fan 52 are selectively operable. In this manner, the first fan 51 is disposed correspondingly to the upper air outlet duct 20, and the second fan 52 is disposed correspondingly to the lower air outlet duct 30, so that different fans supply air to different air outlet ducts, achieving precise air supply and exhaust in the air outlet ducts, thereby enhancing the intelligence of the air conditioner indoor unit. Furthermore, different fans can be selected for operation based on the air conditioner indoor unit's different air supply modes (upper air outlet mode, lower air outlet mode, and upper and lower air outlet mode), thereby reducing the air conditioner indoor unit's power usage and achieving energy-saving operation.

[0064] In this embodiment, the plurality of fans 50 include a first fan 51 and a second fan 52. The first fan 51 is disposed in the upper air outlet duct 20, and the second fan 52 is disposed in the lower air outlet duct 30. The air conditioner indoor unit further includes a control module electrically connected to the first fan 51, the second fan 52, the first switching mechanism 60, the second switching mechanism 70, the first auxiliary air duct switching mechanism 101, and the second auxiliary air duct switching mechanism 102 to control the start and stop states of the first fan 51 and the second fan 52, the position of the first switching mechanism 60, the position of the second switching mechanism 70, the position of the first auxiliary air duct switching mechanism 101, and the position of the second auxiliary air duct switching mechanism 102. The air conditioner indoor unit includes a first upper airflow mode, a second upper airflow mode, a first lower airflow mode, a second lower airflow mode, and an upper and lower airflow mode. When the air-conditioning indoor unit is in the first upper air-outlet mode, the control module controls the first fan 51 and the second fan 52 to start, controls the first switching mechanism 60 to move to the first position, controls the second switching mechanism 70 to move to the fourth position, controls the first auxiliary air duct switching mechanism 101 to move to block the first partition gap 91, and controls the second auxiliary air duct switching mechanism 102 to move to avoid the second partition gap 92; when the air-conditioning indoor unit is in the second upper air-outlet mode, the control module controls the first fan 51 to start, controls the first switching mechanism 60 to move to the first position, controls the second switching mechanism 70 to move to the fourth position, controls the first auxiliary air duct switching mechanism 101 to move to block the first partition gap 91, and controls the second auxiliary air duct switching mechanism 102 to move to block the second partition gap 92; when the air-conditioning indoor unit is in the first lower air-outlet mode, the control module controls the first fan 51 and the second fan 52 to start, controls the first switching mechanism 60 to move to the second position, controls the second switching mechanism 70 to move to the fourth position, controls the first auxiliary air duct switching mechanism 101 to move to block the first partition gap 91, and controls the second auxiliary air duct switching mechanism 102 to move to block the second partition gap 92. 0 moves to the third position, controls the first auxiliary air duct switching mechanism 101 to move to avoid the first partition gap 91, and controls the second auxiliary air duct switching mechanism 102 to move to block the second partition gap 92; when the air-conditioning indoor unit is in the second down-air outlet mode, the control module controls the second fan 52 to start, controls the first switching mechanism 60 to move to the second position, controls the second switching mechanism 70 to move to the third position, controls the first auxiliary air duct switching mechanism 101 to move to block the first partition gap 91, and controls the second auxiliary air duct switching mechanism 102 to move to block the second partition gap 92; when the air-conditioning indoor unit is in the up-down air outlet mode, the control module controls the first fan 51 and the second fan 52 to start, controls the first switching mechanism 60 to move to the first position, controls the second switching mechanism 70 to move to the third position, controls the first auxiliary air duct switching mechanism 101 to move to block the first partition gap 91, and controls the second auxiliary air duct switching mechanism 102 to move to block the second partition gap 92.In this way, the above setting enables the air-conditioning indoor unit to have multiple air outlet modes to meet the different usage needs of users, which not only improves the user experience, but also improves the cooling or heating efficiency of the air-conditioning indoor unit.

[0065] Specifically, when the air-conditioning indoor unit is in cooling mode and only the first fan 51 is controlled to be put into use, the air-conditioning indoor unit is in the second upper air outlet mode. At this time, the gas enters the casing 10 through the lower air inlet 12 and the second air outlet 15 and is discharged from the first air outlet 14 to achieve cold air supply from the top and return air from the bottom; when the air-conditioning indoor unit is in cooling mode and both the first fan 51 and the second fan 52 are controlled to be put into use, the air-conditioning indoor unit is in the first upper air outlet mode. At this time, the gas enters the casing 10 through the lower air inlet 12 and the second air outlet 15 and is discharged from the first air outlet 14 and the upper air outlet 18 to achieve cold air supply from the top and return air from the bottom.

[0066] Specifically, when the air-conditioning indoor unit is in heating mode and only the second fan 52 is controlled to be put into use, the air-conditioning indoor unit is in the second downward air outlet mode. At this time, the gas enters the casing 10 through the upper air inlet 11 and the first air outlet 14 and is discharged from the second air outlet 15 to achieve hot air supply at the bottom and return air at the top; when the air-conditioning indoor unit is in heating mode and both the first fan 51 and the second fan 52 are controlled to be put into use, the air-conditioning indoor unit is in the first downward air outlet mode. At this time, the gas enters the casing 10 through the upper air inlet 11 and the first air outlet 14 and is discharged from the second air outlet 15 and the lower air outlet 19 to achieve hot air supply at the bottom and return air at the top.

[0067] Specifically, when the air conditioner indoor unit is in the up-and-down air outlet mode, it is applicable to both the heating mode and the cooling mode.

[0068] In other embodiments not shown in the accompanying drawings, there is a single fan, and the air conditioner indoor unit further includes a control module. The control module is electrically connected to the fan, the first switching mechanism, the second switching mechanism, the first auxiliary air duct switching mechanism, and the second auxiliary air duct switching mechanism to control the start and stop status of the fan, the position of the first switching mechanism, the position of the second switching mechanism, the position of the first auxiliary air duct switching mechanism, and the position of the second auxiliary air duct switching mechanism. The air conditioner indoor unit includes a first upper airflow mode, a second upper airflow mode, a first lower airflow mode, a second lower airflow mode, and an upper and lower airflow mode. When the air-conditioning indoor unit is in the first upper air-outlet mode, the control module controls the fan to start, controls the first switching mechanism to move to the first position, controls the second switching mechanism to move to the fourth position, controls the first auxiliary air duct switching mechanism to move to block the first partition gap, and controls the second auxiliary air duct switching mechanism to move to avoid the second partition gap; when the air-conditioning indoor unit is in the second upper air-outlet mode, the control module controls the fan to start, controls the first switching mechanism to move to the first position, controls the second switching mechanism to move to the fourth position, controls the first auxiliary air duct switching mechanism to move to block the first partition gap, and controls the second auxiliary air duct switching mechanism to move to block the second partition gap; when the air-conditioning indoor unit is in the first lower air-outlet mode, the control module controls the fan to start, controls the first switching mechanism to move to the second position, controls the second switching mechanism to move to the third position, controls the first auxiliary air duct switching mechanism to move to avoid the first partition gap and controls the second auxiliary air duct switching mechanism to move to block the second partition gap; when the air conditioner indoor unit is in the second down-air outlet mode, the control module controls the fan to start, controls the first switching mechanism to move to the second position, controls the second switching mechanism to move to the third position, controls the first auxiliary air duct switching mechanism to move to block the first partition gap and controls the second auxiliary air duct switching mechanism to move to block the second partition gap; when the air conditioner indoor unit is in the up-down air outlet mode, the control module controls the fan to start, controls the first switching mechanism to move to the first position, controls the second switching mechanism to move to the third position, controls the first auxiliary air duct switching mechanism to move to block the first partition gap and controls the second auxiliary air duct switching mechanism to move to block the second partition gap. In this way, the above-mentioned setting enables the air conditioner indoor unit to have multiple air outlet modes to meet the different usage needs of users, which not only improves the user experience, but also improves the cooling or heating efficiency of the air conditioner indoor unit.

[0069] Specifically, when the air-conditioning indoor unit is in cooling mode, the air-conditioning indoor unit is controlled to be in the second upper air outlet mode. At this time, the gas enters the casing 10 through the lower air inlet 12 and the second air outlet 15 and is discharged from the first air outlet 14 to achieve cold air supply from the top and return air from the bottom; or, the air-conditioning indoor unit is controlled to be in the first upper air outlet mode. At this time, the gas enters the casing 10 through the lower air inlet 12 and the second air outlet 15 and is discharged from the first air outlet 14 and the upper air outlet 18 to achieve cold air supply from the top and return air from the bottom.

[0070] Specifically, when the air-conditioning indoor unit is in the heating mode, the air-conditioning indoor unit is controlled to be in the second downward air outlet mode. At this time, the gas enters the casing 10 through the upper air inlet 11 and the first air outlet 14 and is discharged from the second air outlet 15 to achieve hot air supply at the bottom and return air at the top; or, the air-conditioning indoor unit is controlled to be in the first downward air outlet mode. At this time, the gas enters the casing 10 through the upper air inlet 11 and the first air outlet 14 and is discharged from the second air outlet 15 and the lower air outlet 19 to achieve hot air supply at the bottom and return air at the top.

[0071] Specifically, when the air conditioner indoor unit is in the up-and-down air outlet mode, it is applicable to both the heating mode and the cooling mode.

[0072] In this embodiment, the fan 50 is a centrifugal fan.

[0073] The present application also provides an air-conditioning device (not shown), comprising an air-conditioning indoor unit and an air-conditioning outdoor unit connected by a pipeline, wherein the air-conditioning indoor unit is the air-conditioning indoor unit described above.

[0074] As shown in FIG8 and FIG9 , the present application further provides an air conditioning control method applicable to the above-mentioned air conditioning indoor unit, the air conditioning control method comprising:

[0075] Step S1: determining the heat exchange mode of the air conditioner indoor unit, where the heat exchange mode includes cooling mode and heating mode;

[0076] Step S2: Determine whether the user has set the operation mode of the air conditioner indoor unit. If the user has not set the operation mode, obtain the indoor temperature T 内 , Set temperature of air conditioner indoor unit T 设 and indoor temperature T 内 and set temperature T 设 The difference between △T;

[0077] Step S3: Obtain indoor temperature T according to heat exchange mode 内 The operating mode of the air conditioner indoor unit is selected based on the relationship between the temperature difference ΔT and the first preset temperature T1 or the second preset temperature T2, and the relationship between the difference ΔT and the first preset difference ΔT1 or the second preset difference ΔT2. The operating modes include a first upper airflow mode, a second upper airflow mode, a first lower airflow mode, a second lower airflow mode, and an upper and lower airflow mode.

[0078] Specifically, T 内 is the indoor ambient temperature value, and the temperature detection device is located in the middle of the rear part of the air conditioner indoor unit; T 设 Set the temperature value for user startup.

[0079] In this embodiment, step S3 includes:

[0080] If the air conditioner indoor unit is in cooling mode and the indoor temperature is T 内 If the temperature is greater than the first preset temperature T1 and the difference △T is greater than the first preset difference △T1, the air conditioner indoor unit is controlled to be in the up and down air outlet mode;

[0081] If the air conditioner indoor unit is in cooling mode and the indoor temperature is T 内 If the temperature is less than or equal to the first preset temperature T1 and the difference ΔT is less than or equal to the first preset difference ΔT1, the air conditioner indoor unit is controlled to be in the first upper air outlet mode or the second upper air outlet mode.

[0082] In this embodiment, when the indoor unit of the air conditioner is in cooling mode and the indoor temperature is T 内 When the temperature is greater than the first preset temperature T1 and the difference ΔT is greater than the first preset difference ΔT1, step S3 further includes:

[0083] Step S31: Obtain the temperature T of the lower air inlet of the air conditioner indoor unit 下回 , temperature T 下回 and set temperature T 设 The difference between △T 下回 ;

[0084] Step S32: Determine the difference ΔT 下回 The relationship between the first temperature t1 and the second temperature t2 is used to adjust the operating mode and / or operating parameters of the air conditioner indoor unit, where the operating parameters include the speed of the fan and the operating frequency of the compressor.

[0085] In this embodiment, T 下回 The temperature detection device is located at the lower air inlet of the air conditioner indoor unit.

[0086] In this embodiment, step S32 includes:

[0087] Step S321: If the difference ΔT 下回 If the temperature is greater than the first temperature t1 and less than the second temperature t2, the air conditioner indoor unit is controlled to switch to the first upper air outlet mode or the second upper air outlet mode;

[0088] Step S322: Continue to determine the difference ΔT 下回 The relationship between the first temperature t1 and the 下回 If the temperature is less than or equal to the first temperature t1, the speed of the fan is reduced and / or the operating frequency of the compressor is lowered;

[0089] Step S323: Continue to determine the difference ΔT 下回 The relationship between the second temperature t2, if the difference △T 下回 If the temperature is greater than or equal to the second temperature t2, the air conditioner indoor unit is controlled to continue operating in the first upper air outlet mode or the second upper air outlet mode.

[0090] In this embodiment, in step S323, if the difference ΔT 下回 If the temperature is greater than or equal to the third temperature t3, the air-conditioning room is controlled to switch to the up and down air outlet mode; wherein the third temperature t3 is greater than the second temperature t2.

[0091] In this embodiment, step S3 further includes:

[0092] If the air conditioner indoor unit is in heating mode and the indoor temperature is T 内 If the temperature is lower than the second preset temperature T2 and the difference △T is greater than the second preset difference △T2, the air conditioner indoor unit is controlled to be in the up and down air outlet mode;

[0093] If the air conditioner indoor unit is in heating mode and the indoor temperature is T 内 If the temperature is greater than or equal to the second preset temperature T2 and the difference ΔT is less than or equal to the second preset difference ΔT2, the air conditioner indoor unit is controlled to be in the first down-flow mode or the second down-flow mode.

[0094] In this embodiment, when the indoor unit of the air conditioner is in heating mode and the indoor temperature is T 内 When the temperature is lower than the second preset temperature T2 and the difference ΔT is higher than the second preset difference ΔT2, step S3 further includes:

[0095] Step S33: Obtain the temperature T of the upper air inlet of the air conditioner indoor unit 上回 , temperature T 上回 and set temperature T 设 The difference between △T 上回 ;

[0096] Step S34: Determine the difference ΔT 上回 The relationship between the fourth temperature t4 and the fifth temperature t5 is used to adjust the operation mode and / or operation parameters of the air-conditioning indoor unit, where the operation parameters include the speed of the fan and the operating frequency of the compressor.

[0097] Specifically, T 上回 The upper return air temperature value is located at the upper air inlet of the air conditioner indoor unit.

[0098] In this embodiment, step S34 includes:

[0099] Step S341: If the difference ΔT 上回 If the temperature is greater than the fourth temperature t4 and less than the fifth temperature t5, the air conditioner indoor unit is controlled to switch to the first downward air outlet mode or the second downward air outlet mode;

[0100] Step S342: Continue to determine the difference ΔT 上回 and the fourth temperature t4, if the difference △T 上回is less than or equal to the fourth temperature t4, reducing the speed of the fan and / or lowering the operating frequency of the compressor;

[0101] Step S343: Continue to determine the difference ΔT 上回 and the fifth temperature t5, if the difference △T 上回 If the temperature is greater than or equal to the fifth temperature t5, the air conditioner indoor unit is controlled to switch to the up and down air outlet mode.

[0102] In this embodiment, when the air conditioner indoor unit is in cooling mode, the user can select the upper and lower air outlet mode, the upper air outlet mode, or no air outlet mode. When the user sets the upper and lower air outlet mode, the first fan and the second fan are turned on at the same time, and the first switching mechanism and the second switching mechanism do not operate. When the user sets the upper air outlet mode, the first fan and the second fan are turned on at the same time, and the second switching mechanism operates. When the user does not set the air outlet mode, the power-on detection T 内 , when T 内 >T1 and T 内 -T 设 >△T1, it is determined that the indoor ambient temperature is too high at the initial startup and needs to be cooled quickly. The first fan and the second fan are turned on at the same time, and the first switching mechanism and the second switching mechanism do not operate; when t1<T 下回 -T 设 <t2, at this time it means that the indoor ambient temperature has dropped to a level that the user feels comfortable, the cooling speed can be slowed down, the second fan stops running, the first fan remains on, and the second switching mechanism is activated; when T 下回 -T 设 ≤t1, at this time it is determined that the indoor ambient temperature has reached the user set temperature, the first fan is reduced by 1 gear, and the frequency of the compressor is reduced by n to maintain the indoor ambient temperature; when T 下回 -T 设 ≥t2, indicating that the indoor ambient temperature has risen, but has not yet affected the user's comfort experience. At this time, the control process returns to the previous layer (the second fan stops, the first fan remains on, and the second duct switching mechanism is activated); when T 下回 -T 设 ≥t3, indicating that the indoor ambient temperature has risen to a level that affects the comfort experience, and the control process returns to the previous level (the first and second fans are turned on at the same time, and the first switching mechanism and the second switching mechanism do not operate). 内 ≤ the first preset temperature T1 or T 内 -T 设 When ≤△T1, it means that the indoor ambient temperature is not high, but the user still has cooling needs, and only one fan is turned on to meet the comfort needs. At this time, the first fan is turned on, the second fan is not turned on, and the second switching mechanism is activated.

[0103] In this embodiment, when the air conditioner indoor unit is in heating mode, the user can select the upper and lower air outlet mode, the lower air outlet mode, or no air outlet mode is set. When the user sets the upper and lower air outlet mode, the first fan and the second fan are turned on at the same time, and the first switching mechanism and the second switching mechanism are not activated. When the user sets the lower air outlet mode, the first fan and the second fan are turned on at the same time, and the first switching mechanism is activated. When the user does not set the air outlet mode, the power-on detection T 内 When T 内 <T2 and T 设 -T 内 >△T2, it is determined that the indoor ambient temperature is low at the initial startup and needs to be heated up quickly. The first and second fans are turned on at the same time, and the first and second switching mechanisms do not operate. When t4<T 设 -T 上回 <t5, at this time it means that the indoor ambient temperature has risen to a level that the user feels comfortable, the heating speed can be slowed down, the first fan stops running, the second fan remains on, and the first switching mechanism is activated; when T 设 -T 上回 ≤t4, at this time it is determined that the indoor ambient temperature has reached the user set temperature, the second fan is reduced by 1 gear, and the frequency of the compressor is reduced by n to maintain the indoor ambient temperature; when T 设 -T 上回 ≥t5, indicating that the indoor ambient temperature has dropped. In order to ensure the user's heating comfort experience, the control process returns to (the first fan and the second fan are turned on at the same time, and the first switching mechanism and the second switching mechanism are not activated). 内 ≥T2 or T 设 -T 内 When ≤△T2, it means that the indoor ambient temperature is not low, but the user still has heating needs, and only one fan is turned on to meet the comfort needs. At this time, the second fan is turned on, the first fan is not turned on, and the first switching mechanism is actuated.

[0104] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0105] The air conditioner indoor unit includes a housing, an air duct assembly, and a heat exchange assembly. The housing has an upper air inlet, a lower air inlet, a mounting cavity, a first air outlet, a second air outlet, an upper air outlet, and a lower air outlet. The upper air inlet and the lower air inlet are both connected to the mounting cavity, with the first air outlet located above the second air outlet. The air duct assembly is disposed within the housing and includes an upper air outlet channel, a lower air outlet channel, and an auxiliary air outlet channel. The upper air outlet channel is connectable and disconnectable with the first air outlet and the auxiliary air outlet channel, while the lower air outlet channel is connectable and disconnectable with the second air outlet and the auxiliary air outlet channel. The auxiliary air outlet channel is connectable and disconnectable with both the upper air outlet and the lower air outlet. The heat exchange assembly is disposed within the mounting cavity. In this way, when the upper air outlet channel is connected to the first air outlet, the first air outlet serves as an air outlet. If the lower air outlet channel is connected to the auxiliary air outlet channel at this time, gas can also be discharged from the upper air outlet, that is, both the first air outlet and the upper air outlet can discharge air. When the upper air outlet channel is disconnected from the first air outlet, the first air outlet serves as an air inlet. If the upper air outlet channel is connected to the auxiliary air outlet channel at this time, gas can also be discharged from the lower air outlet, that is, both the second air outlet and the lower air outlet can discharge air. When the lower air outlet channel is connected to the second air outlet, the second air outlet serves as an air outlet. If the upper air outlet channel is connected to the auxiliary air outlet channel at this time, gas can also be discharged from the lower air outlet, that is, both the second air outlet and the lower air outlet can discharge air. When the lower air outlet channel is disconnected from the second air outlet, the second air outlet serves as an air inlet. If the lower air outlet channel is connected to the auxiliary air outlet channel at this time, gas can also be discharged from the upper air outlet, that is, both the upper air outlet and the first air outlet can discharge air. When the air conditioner is in cooling mode, the upper air outlet is connected to the first air outlet, which can also discharge air, so that cold air is delivered from the top and air is returned from the bottom. When the air conditioner is in heating mode, the lower air outlet is connected to the second air outlet, which can also discharge air, so that hot air is delivered from the bottom and air is returned from the top. This fundamentally solves the comfort problem of "hot head and cold feet" when the air conditioner is heating and "cold air blowing on people" when cooling. It also solves the problem of air conditioners affecting user comfort during cooling or heating in the existing technology, and improves the user experience. At the same time, the first and second air outlets can both serve as air inlets and outlets, thereby increasing the air intake or outlet volume of the air conditioner, not only achieving rapid cooling or heating of the air conditioner, but also realizing cooling and heating cycles throughout the house.

[0106] Obviously, the embodiments described above are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0107] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0108] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0109] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An air conditioner indoor unit, characterized in that, Including: A casing (10) having an upper air inlet (11), a lower air inlet (12), an installation cavity (13), a first air passing opening (14), a second air passing opening (15), an upper air outlet (18) and a lower air outlet (19), wherein the upper air inlet (11) and the lower air inlet (12) are both communicated with the installation cavity (13), and the first air passing opening (14) is located above the second air passing opening (15); An air duct assembly disposed within the casing (10), the air duct assembly including an upper air outlet passage (20), a lower air outlet passage (30) and an auxiliary air outlet passage (80), the upper air outlet passage (20) being disposed in a switchable manner with the first air passing opening (14) and in a switchable manner with the auxiliary air outlet passage (80), the lower air outlet passage (30) being disposed in a switchable manner with the second air passing opening (15) and in a switchable manner with the auxiliary air outlet passage (80); the auxiliary air outlet passage (80) being disposed in a switchable manner with both the upper air outlet (18) and the lower air outlet (19); A heat exchange assembly (40) disposed within the installation cavity (13); Wherein, the lower air inlet (12) can be communicated with the upper air outlet passage (20) through the installation cavity (13); or, the lower air inlet (12) can be communicated with the lower air outlet passage (30) through the installation cavity (13); or, the lower air inlet (12) can be communicated with both the upper air outlet passage (20) and the lower air outlet passage (30) through the installation cavity (13); the upper air inlet (11) can be communicated with the upper air outlet passage (20) through the installation cavity (13); or, the upper air inlet (11) can be communicated with the lower air outlet passage (30) through the installation cavity (13); or, the upper air inlet (11) can be communicated with both the upper air outlet passage (20) and the lower air outlet passage (30) through the installation cavity (13); both the upper air outlet passage (20) and the lower air outlet passage (30) are located between the installation cavity (13) and the auxiliary air outlet passage (80).

2. The air conditioner indoor unit according to claim 1, characterized in that, The casing (10) has a front panel (16) and a rear panel (17) disposed opposite to each other, and the auxiliary air outlet passage (80) is disposed closer to the front panel (16) relative to the installation cavity (13).

3. The air conditioner indoor unit according to claim 1, characterized in that, A partition (90) is disposed within the casing (10), and the partition (90) forms at least a part of the channel wall of the upper air outlet passage (20), at least a part of the channel wall of the lower air outlet passage (30), and at least a part of the channel wall of the auxiliary air outlet passage (80).

4. The air conditioner indoor unit according to claim 3, characterized in that, The partition (90) has a first partition notch (91), the first partition notch (91) is located between the upper air outlet passage (20) and the auxiliary air outlet passage (80), and the air duct assembly includes: The first auxiliary air duct switching mechanism (101), the first auxiliary air duct switching mechanism (101) is movably arranged at the first partition gap (91) to block or avoid the first partition gap (91), so as to control the on-off state of the upper air outlet channel (20) and the auxiliary air outlet channel (80); Wherein, when the first auxiliary air duct switching mechanism (101) avoids the first partition gap (91), the upper air outlet channel (20) is communicated with the auxiliary air outlet channel (80); when the first auxiliary air duct switching mechanism (101) blocks the first partition gap (91), the upper air outlet channel (20) is disconnected from the auxiliary air outlet channel (80).

5. The air conditioner indoor unit according to claim 4, characterized in that, The partition (90) further has a second partition gap (92), the second partition gap (92) is located between the lower air outlet channel (30) and the auxiliary air outlet channel (80), and the air duct assembly includes: The second auxiliary air duct switching mechanism (102), the second auxiliary air duct switching mechanism (102) is movably arranged at the second partition gap (92) to block or avoid the second partition gap (92), so as to control the on-off state of the lower air outlet channel (30) and the auxiliary air outlet channel (80); Wherein, when the second auxiliary air duct switching mechanism (102) avoids the second partition gap (92), the lower air outlet channel (30) is communicated with the auxiliary air outlet channel (80); when the second auxiliary air duct switching mechanism (102) blocks the second partition gap (92), the lower air outlet channel (30) is disconnected from the auxiliary air outlet channel (80).

6. The air conditioner indoor unit according to claim 5, characterized in that, The air duct assembly further includes: The first switching mechanism (60), the first switching mechanism (60) is movably arranged at the upper air outlet channel (20) to block or avoid the first air outlet of the upper air outlet channel (20), so as to control the on-off state of the upper air outlet channel (20) and the first air passing opening (14).

7. The air conditioner indoor unit according to claim 6, characterized in that, The side wall of the upper air outlet channel (20) has a first gap (21), the first switching mechanism (60) is rotatably arranged in the upper air outlet channel (20), and the first switching mechanism (60) has a first position blocking the first gap (21) and a second position blocking the first air outlet; wherein, when the first switching mechanism (60) is in the first position, the first air outlet is communicated with the first air passing opening (14); when the first switching mechanism (60) is in the second position, the first air outlet is disconnected from the first air passing opening (14), and the first air passing opening (14) is communicated with the installation cavity (13).

8. The air conditioner indoor unit according to claim 7, wherein, When the first switching mechanism (60) is in the second position, at least a part of the first switching mechanism (60) overlaps on the partition (90), so that the first partition gap (91) is located on the side of the first switching mechanism (60) away from the first air passing opening (14).

9. The air conditioner indoor unit according to claim 8, characterized in that, The air duct assembly further includes: A second switching mechanism (70) is movably arranged at the lower air outlet channel (30) to block or avoid a second air outlet of the lower air outlet channel (30), thereby controlling the on-off state between the lower air outlet channel (30) and the second air passing opening (15).

10. The air conditioner indoor unit according to claim 9, characterized in that, The side wall of the lower air outlet channel (30) has a second notch (31). The second switching mechanism (70) is rotatably arranged in the lower air outlet channel (30). The second switching mechanism (70) has a third position for blocking the second notch (31) and a fourth position for blocking the second air outlet. When the second switching mechanism (70) is in the third position, the second air outlet is in communication with the second air passing opening (15). When the second switching mechanism (70) is in the fourth position, the second air outlet is disconnected from the second air passing opening (15), and the second air passing opening (15) is in communication with the installation cavity (13).

11. The air conditioner indoor unit according to claim 10, characterized in that, When the second switching mechanism (70) is in the fourth position, at least a part of the second switching mechanism (70) overlaps on the partition plate (90), so that the second partition plate notch (92) is located on a side of the second switching mechanism (70) away from the second air passing opening (15).

12. The air conditioner indoor unit according to claim 10, characterized in that, The air duct assembly further includes a blower (50) arranged opposite to the heat exchange assembly (40). The blower (50) is arranged in the upper air outlet channel (20); alternatively, the blower (50) is arranged in the lower air outlet channel (30); alternatively, the blower (50) is arranged in both the upper air outlet channel (20) and the lower air outlet channel (30). The blower (50) is one; or the blower (50) is multiple, and the multiple blowers (50) are arranged at intervals along the height direction of the housing (10).

13. The air conditioner indoor unit according to claim 12, characterized in that, When the blower (50) is multiple, the multiple blowers (50) include a first blower (51) and a second blower (52). The first blower (51) is arranged in the upper air outlet channel (20), and the second blower (52) is arranged in the lower air outlet channel (30). The first blower (51) and the second blower (52) can be selectively put into use.

14. The air conditioner indoor unit according to claim 12, characterized in that, The blower (50) is one, and the air conditioner indoor unit further includes: A control module electrically connected to the blower (50), the first switching mechanism (60), the second switching mechanism (70), the first auxiliary air duct switching mechanism (101), and the second auxiliary air duct switching mechanism (102) respectively, for controlling the start-stop state of the blower (50), the positions of the first switching mechanism (60), the second switching mechanism (70), the first auxiliary air duct switching mechanism (101), and the second auxiliary air duct switching mechanism (102). The air conditioner indoor unit includes: The first upper air outlet mode. When the air conditioner indoor unit is in the first upper air outlet mode, the control module controls the blower (50) to start, controls the first switching mechanism (60) to move to the first position, controls the second switching mechanism (70) to move to the fourth position, controls the first auxiliary air duct switching mechanism (101) to move to block the first partition gap (91), and controls the second auxiliary air duct switching mechanism (102) to move to avoid the second partition gap (92). The second upper air outlet mode. When the air conditioner indoor unit is in the second upper air outlet mode, the control module controls the blower (50) to start, controls the first switching mechanism (60) to move to the first position, controls the second switching mechanism (70) to move to the fourth position, controls the first auxiliary air duct switching mechanism (101) to move to block the first partition gap (91), and controls the second auxiliary air duct switching mechanism (102) to move to block the second partition gap (92). The first lower air outlet mode. When the air conditioner indoor unit is in the first lower air outlet mode, the control module controls the blower (50) to start, controls the first switching mechanism (60) to move to the second position, controls the second switching mechanism (70) to move to the third position, controls the first auxiliary air duct switching mechanism (101) to move to avoid the first partition gap (91), and controls the second auxiliary air duct switching mechanism (102) to move to block the second partition gap (92). The second lower air outlet mode. When the air conditioner indoor unit is in the second lower air outlet mode, the control module controls the blower (50) to start, controls the first switching mechanism (60) to move to the second position, controls the second switching mechanism (70) to move to the third position, controls the first auxiliary air duct switching mechanism (101) to move to block the first partition gap (91), and controls the second auxiliary air duct switching mechanism (102) to move to block the second partition gap (92). The upper and lower air outlet mode. When the air conditioner indoor unit is in the upper and lower air outlet mode, the control module controls the blower (50) to start, controls the first switching mechanism (60) to move to the first position, controls the second switching mechanism (70) to move to the third position, controls the first auxiliary air duct switching mechanism (101) to move to block the first partition gap (91), and controls the second auxiliary air duct switching mechanism (102) to move to block the second partition gap (92).

15. The air conditioner indoor unit according to claim 13, characterized in that, When there are multiple blowers (50), the multiple blowers (50) include a first blower (51) and a second blower (52). The first blower (51) is arranged in the upper air outlet channel (20), and the second blower (52) is arranged in the lower air outlet channel (30). The air conditioner indoor unit further includes: A control module, which is electrically connected to the first blower (51), the second blower (52), the first switching mechanism (60), the second switching mechanism (70), the first auxiliary air duct switching mechanism (101) and the second auxiliary air duct switching mechanism (102) respectively, for controlling the start / stop states of the first blower (51) and the second blower (52), the positions of the first switching mechanism (60), the second switching mechanism (70), the first auxiliary air duct switching mechanism (101) and the second auxiliary air duct switching mechanism (102); wherein, the indoor air conditioner includes: A first upper air outlet mode. When the indoor air conditioner is in the first upper air outlet mode, the control module controls both the first blower (51) and the second blower (52) to start, controls the first switching mechanism (60) to move to the first position, controls the second switching mechanism (70) to move to the fourth position, controls the first auxiliary air duct switching mechanism (101) to move to block the first partition gap (91), and controls the second auxiliary air duct switching mechanism (102) to move to avoid the second partition gap (92); A second upper air outlet mode. When the indoor air conditioner is in the second upper air outlet mode, the control module controls the first blower (51) to start, controls the first switching mechanism (60) to move to the first position, controls the second switching mechanism (70) to move to the fourth position, controls the first auxiliary air duct switching mechanism (101) to move to block the first partition gap (91), and controls the second auxiliary air duct switching mechanism (102) to move to block the second partition gap (92); A first lower air outlet mode. When the indoor air conditioner is in the first lower air outlet mode, the control module controls both the first blower (51) and the second blower (52) to start, controls the first switching mechanism (60) to move to the second position, controls the second switching mechanism (70) to move to the third position, controls the first auxiliary air duct switching mechanism (101) to move to avoid the first partition gap (91), and controls the second auxiliary air duct switching mechanism (102) to move to block the second partition gap (92); A second lower air outlet mode. When the indoor air conditioner is in the second lower air outlet mode, the control module controls the second blower (52) to start, controls the first switching mechanism (60) to move to the second position, controls the second switching mechanism (70) to move to the third position, controls the first auxiliary air duct switching mechanism (101) to move to block the first partition gap (91), and controls the second auxiliary air duct switching mechanism (102) to move to block the second partition gap (92); The up-and-down air outlet mode. When the air conditioner indoor unit is in the up-and-down air outlet mode, the control module controls both the first fan (51) and the second fan (52) to start, controls the first switching mechanism (60) to move to the first position, controls the second switching mechanism (70) to move to the third position, controls the first auxiliary air duct switching mechanism (101) to move to block the first partition gap (91), and controls the second auxiliary air duct switching mechanism (102) to move to block the second partition gap (92).

16. An air-conditioning device, characterized in that, It includes an air conditioner indoor unit and an air conditioner outdoor unit connected through a pipeline; wherein, the air conditioner indoor unit is the air conditioner indoor unit according to any one of claims 1 to 15.

17. An air conditioner control method, characterized in that, Applicable to the air conditioner indoor unit according to any one of claims 1 to 15, the air conditioner control method includes: Step S1: Determine the heat exchange mode of the air conditioner indoor unit, and the heat exchange mode includes a cooling mode and a heating mode; Step S2: Determine whether the user has set the operating mode of the air conditioner indoor unit. If the user has not set the operating mode, obtain the indoor temperature T 内 , the set temperature T of the air conditioner indoor unit 设 , and the difference △T between the indoor temperature T 内 and the set temperature T 设 ; Step S3: Obtain the indoor temperature T according to the heat exchange mode 内 Obtain the relationship between the difference ΔT and the first preset difference ΔT1 or the second preset difference ΔT2 based on the relationship between the indoor temperature T and the first preset temperature T1 or the second preset temperature T2, and select the operating mode of the indoor unit of the air conditioner; Wherein, the operation mode includes a first upper air outlet mode, a second upper air outlet mode, a first lower air outlet mode, a second lower air outlet mode, and an up-and-down air outlet mode.

18. The air conditioner control method according to claim 17, wherein The step S3 includes: If the indoor unit of the air conditioner is in the cooling mode and the indoor temperature T 内 is greater than the first preset temperature T1 and the difference △T is greater than the first preset difference △T1, then control the indoor unit of the air conditioner to be in the up-and-down air outlet mode; If the indoor unit of the air conditioner is in the cooling mode and the indoor temperature T 内 is less than or equal to the first preset temperature T1 and the difference ΔT is less than or equal to the first preset difference ΔT1, then control the indoor unit of the air conditioner to be in the first upper air outlet mode or the second upper air outlet mode.

19. The air-conditioning control method according to claim 18, wherein When the air conditioner indoor unit is in the refrigeration mode and the indoor temperature T 内 is greater than the first preset temperature T1 and the difference △T is greater than the first preset difference △T1, step S3 further includes: Step S31: Obtain the temperature T of the lower air inlet of the air conditioner indoor unit 下回 , the temperature T 下回 and the difference ΔT 设 between the temperature T 下回 ; Step S32: Determine the relationship between the difference △T 下回 and the first temperature t1 and the second temperature t2, so as to adjust the operation mode and / or operation parameters of the air conditioner indoor unit, where the operation parameters include the rotation speed of the fan and the operation frequency of the compressor.

20. The air conditioner control method according to claim 19, wherein The step S32 includes: Step S321: If the difference △T 下回 is greater than the first temperature t1 and less than the second temperature t2, then control the air conditioner indoor unit to switch to the first upper air outlet mode or the second upper air outlet mode; Step S322: Continuously determine the relationship between the difference △T 下回 and the first temperature t1. If the difference △T 下回 is less than or equal to the first temperature t1, then reduce the rotational speed of the blower and / or lower the operating frequency of the compressor; Step S323: Continuously determine the difference △T 下回 and the relationship with the second temperature t2. If the difference △T 下回 is greater than or equal to the second temperature t2, then control the indoor unit of the air conditioner to continuously operate in the first upper air outlet mode or the second upper air outlet mode.

21. The air conditioner control method according to claim 20, characterized in that, In the step S323, if the difference △T 下 回 is greater than or equal to the third temperature t3, then control the indoor unit of the air conditioner to switch to the up-and-down air supply mode; wherein, the third temperature t3 is greater than the second temperature t2.

22. The air conditioner control method according to claim 17, characterized in that, The step S3 further includes: If the air conditioner indoor unit is in the heating mode and the indoor temperature T 内 is less than the second preset temperature T2 and the difference △T is greater than the second preset difference △T2, then control the air conditioner indoor unit to be in the up-and-down air outlet mode; If the indoor unit of the air conditioner is in the heating mode and the indoor temperature T 内 is greater than or equal to the second preset temperature T2 and the difference △T is less than or equal to the second preset difference △T2, then control the indoor unit of the air conditioner to be in the first downward air outlet mode or the second downward air outlet mode.

23. The air conditioner control method according to claim 22, wherein When the air conditioner indoor unit is in the heating mode and the indoor temperature T 内 is less than the second preset temperature T2 and the difference ΔT is greater than the second preset difference ΔT2, the step S3 further includes: Step S33: Obtain the temperature T of the upper air inlet of the air conditioner indoor unit 上回 , the temperature T 上回 and the difference ΔT 设 between the temperature T 上回 ; Step S34: Determine the relationship between the difference △T 上回 and the fourth temperature t4 and the fifth temperature t5, so as to adjust the operation mode and / or operation parameters of the air conditioner indoor unit, where the operation parameters include the rotation speed of the blower and the operation frequency of the compressor.

24. The air conditioner control method according to claim 23, characterized in that, The step S34 includes: Step S341: If the difference ΔT 上回 is greater than the fourth temperature t4 and less than the fifth temperature t5, then control the indoor air conditioner to switch to the first downward air outlet mode or the second downward air outlet mode; Step S342: Continuously determine the relationship between the difference △T 上回 and the fourth temperature t4. If the difference △T 上回 is less than or equal to the fourth temperature t4, then reduce the rotational speed of the fan and / or lower the operating frequency of the compressor; Step S343: Continuously judge the relationship between the difference △T 上回 and the fifth temperature t5. If the difference △T 上回 is greater than or equal to the fifth temperature t5, then control the air conditioner indoor unit to switch to the up-and-down air outlet mode.

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