Air conditioner indoor unit, air conditioner and control method

Abstract

This invention provides an indoor air conditioner unit, an air conditioner, and a control method. The indoor air conditioner unit includes an air conditioner housing. An indoor heat exchanger and an auxiliary heater are disposed within the internal space of the air conditioner housing. An air outlet cavity is formed within the air conditioner housing on the air outlet side of the indoor heat exchanger. The auxiliary heater has a heating position within the air outlet cavity and a drag-reducing position outside the air outlet cavity. The auxiliary heater can be driven to switch between the heating position and the drag-reducing position. This invention allows the auxiliary heater to be driven to the drag-reducing position (i.e., outside the air outlet cavity) when heating the airflow is not required. This eliminates the obstruction of the airflow by the auxiliary heater being inside the air outlet cavity, reduces airflow resistance, increases airflow volume, and thus improves the heat exchange efficiency of the indoor heat exchanger and the performance of the air conditioner.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to an indoor air conditioning unit, an air conditioner, and a control method. Background Technology

[0002] In related technologies, the electric heater of an air conditioner is generally fixed to other parts of the air conditioner by screws and cannot move. This fixed electric heater will bring the following disadvantages: (1) The electric heater has different effects on the airflow of the intake port at different installation positions or installation angles, which affects the performance of the air conditioner. In addition, in the air duct system, the electric heater plays the role of an obstacle, which directly reduces the air volume of the air conditioner; (2) In the air duct system, because the electric heater plays the role of an obstacle, the airflow will form a vortex when it flows through the electric heater. When the air conditioner fan is running at low speed, it will produce obvious surge phenomenon, which affects the comfort of using the air conditioner.

[0003] Utility model patent CN222527784U discloses an air conditioner, in which an auxiliary heater has a rotating axis, and a first windward surface and a second windward surface are arranged sequentially along the direction surrounding the rotating axis. A drive component is connected to the auxiliary heater to drive the auxiliary heater to rotate, thereby changing the windward area of ​​the auxiliary heater. By adjusting the windward area of ​​the auxiliary heater to adapt to its own needs, it is beneficial to improve the performance of the air conditioner. However, since the auxiliary heater in this technical solution is always located in the air outlet cavity of the air conditioner, it forms an air outlet resistance when there is no need to heat the air outlet airflow, thus reducing the air outlet volume. Summary of the Invention

[0004] Therefore, the present invention provides an indoor air conditioner unit, an air conditioner, and a control method, which can overcome the technical problem in the related art where the auxiliary heater is always set in the air outlet cavity of the air conditioner, which obstructs the airflow, results in large air resistance, and reduces the air volume of the air conditioner.

[0005] To address the aforementioned problems, the present invention provides an indoor air conditioner unit, including an air conditioner housing. An indoor heat exchanger and an auxiliary heater are disposed within the internal space of the air conditioner housing. An air outlet cavity is formed within the air conditioner housing on the air outlet side of the indoor heat exchanger. The auxiliary heater has a heating position within the air outlet cavity and a drag-reducing position outside the air outlet cavity. The auxiliary heater can be driven to switch between the heating position and the drag-reducing position.

[0006] In some embodiments, the indoor heat exchanger has a first end face and a second end face on opposite sides of its heat exchange core, wherein the first end face is the end face where the refrigerant manifold of the indoor heat exchanger is located, and when the auxiliary heater is in the drag-reducing position, the auxiliary heater is located in the area corresponding to the second end face, and when the auxiliary heater is in the heating position, the auxiliary heater is located in the air outlet side area of ​​the heat exchange core.

[0007] In some embodiments, the air conditioner housing is further provided with a drive device, which is used to drive the auxiliary heater to switch between the heating position and the drag reduction position in a translational sliding manner.

[0008] In some embodiments, the indoor unit of the air conditioner is a vertical indoor unit, and the drive device has two sets, which are respectively connected to the top and bottom of the auxiliary heater.

[0009] In some embodiments, the driving device includes a device assembly frame and a rotary drive component mounted on the device assembly frame. The device assembly frame has a slider that can be driven to reciprocate by the rotary drive component, and the slider is fixedly connected to the auxiliary heater.

[0010] In some embodiments, the slider is an arc-shaped rack, which is slidably connected to an arc-shaped guide rail on the device assembly frame, and the rotary drive is a rotary motor, with the drive gear on the output shaft of the rotary motor meshing with the arc-shaped rack.

[0011] The present invention also provides an air conditioner, including the above-described indoor air conditioner unit.

[0012] The present invention also provides a control method for an air conditioner as described above, comprising the following steps:

[0013] Obtain the operating mode of the air conditioner;

[0014] When the operating mode is heating mode, it is determined whether the indoor fan is running. If the indoor fan is running, the relationship between the speed Vs of the indoor fan and the preset speed Vy is further determined.

[0015] If Vs < Vy, then the auxiliary heater is controlled to be in the drag-reducing position;

[0016] If Vs≥Vy, then it is further determined whether the indoor fan has been running continuously for a time not less than the first set time t1. If so, the auxiliary heater is controlled to be in the heating position; otherwise, the auxiliary heater is controlled to be in the drag reduction position.

[0017] In some implementations, when Vs≥Vy, the following is also included:

[0018] Further determine whether the following conditions are met: T1≥T2+Ty1, T2<Ty2 and T3<Ty3 is detected for a continuous second set time t2. If the conditions are met, control the auxiliary heater to be in the heating position; otherwise, control the auxiliary heater to be in the drag reduction position. Wherein, T1 is the set temperature of the air conditioner, T2 is the indoor ambient temperature, T3 is the temperature inside the heat exchange tube of the indoor heat exchanger, Ty1 is the first preset temperature value, Ty2 is the second preset temperature value, and Ty3 is the third preset temperature value.

[0019] In some implementations, when the operating mode is a non-heating mode, the auxiliary heater is controlled to be in the drag-reducing position.

[0020] The air conditioner indoor unit, air conditioner, and control method provided by this invention have the following beneficial effects:

[0021] Because the auxiliary heater has a heating position inside the air outlet cavity and a drag-reducing position outside the air outlet cavity, and can be driven to switch between the heating position and the drag-reducing position, when it is not necessary to heat the air outlet, the auxiliary heater can be driven to move to the drag-reducing position, that is, to switch the auxiliary heater outside the air outlet cavity. This eliminates the obstruction of the air outlet by the auxiliary heater being inside the air outlet cavity, reduces the air outlet resistance, increases the air volume, and thus improves the heat exchange efficiency of the indoor heat exchanger and the performance of the air conditioner. When it is necessary to heat the air outlet, such as when the air conditioner is running in heating mode, the auxiliary heater is controlled to be inside the air outlet cavity to achieve auxiliary heating of the air outlet, improve the heating performance of the air conditioner, and enhance the user experience.

[0022] When the auxiliary heater is in the drag-reducing position, it is specifically driven to move to the area corresponding to the second end face. Since the second end face is the side end face where the heat exchange tube transition elbow of the indoor heat exchanger is located, rather than the side end face where the refrigerant distribution pipe of the indoor heat exchanger is located, the space is relatively spacious, which can effectively prevent physical interference between the auxiliary heater and the indoor heat exchanger and ensure the structural compactness of the air conditioning indoor unit.

[0023] The auxiliary heater is driven by a drive device to switch between the heating position and the drag reduction position by translation and sliding. This ensures that the position switching of the auxiliary heater is smooth and stable, and is especially suitable for situations where the auxiliary heater is large in size and mass.

[0024] For vertical indoor units with large height corresponding to large indoor heat exchanger height, drive devices are simultaneously configured at the top and bottom of the auxiliary heater. This enables reliable position switching of the large-mass auxiliary heater. At the same time, the synchronous movement of the top and bottom of the auxiliary heater can effectively prevent tilting caused by the top or bottom of the auxiliary heater getting stuck during the position switching process.

[0025] By utilizing the meshing of the arc-shaped rack with the drive gear on the output shaft of the rotary motor, the rotary motor can move the auxiliary heater in the circumferential direction of the arc-shaped rack, which can further improve the structural compactness of the air conditioner indoor unit.

[0026] If Vs < Vy, it means that the indoor fan speed is low. At this time, controlling the auxiliary heater to be in the drag-reducing position can effectively avoid the eddy currents and backflows generated by the auxiliary heater in the air outlet cavity, and effectively solve the surge problem caused by the low speed of the air conditioner fan.

[0027] If Vs≥Vy, then it is further determined whether the indoor fan has been running continuously for a time not less than the first set time t1. If so, the auxiliary heater is controlled to be in the heating position; otherwise, the auxiliary heater is controlled to be in the drag reduction position. This can effectively prevent the auxiliary heater from being turned on before the indoor fan is started, which would cause the heat generated by the auxiliary heater to not be dissipated in time, resulting in a sudden rise in the temperature inside the air outlet cavity and thus causing safety hazards.

[0028] The indoor space heat demand is determined by whether the conditions T1≥T2+Ty1, T2<Ty2, and T3<Ty3 are detected for a second consecutive set time t2. When the aforementioned conditions are met, it indicates that the indoor space has a large heat demand. At this time, the auxiliary heater is controlled to be energized and moved to the heating position to increase the air outlet temperature and improve the user's comfort. Attached Figure Description

[0029] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the internal structure of the air conditioner indoor unit in an embodiment of the present invention. The indoor fan and other components are not shown in the figure, and the auxiliary heater in the figure is in the heating position.

[0031] Figure 2 This is a schematic diagram of the internal structure of the air conditioner indoor unit in an embodiment of the present invention. The indoor fan and other components are not shown in the figure, and the auxiliary heater in the figure is in a drag-reducing position.

[0032] Figure 3 yes Figure 1 A three-dimensional structural diagram of the drive device in the diagram;

[0033] Figure 4This is a schematic diagram of the steps of the air conditioner control method in an embodiment of the present invention.

[0034] The attached figures are labeled as follows:

[0035] 1. Air conditioner casing;

[0036] 2. Indoor heat exchanger; 201. First end face; 202. Second end face; 21. Refrigerant manifold;

[0037] 3. Auxiliary heater;

[0038] 4. Drive unit; 41. Assembly frame; 42. Rotary drive component; 43. Slider;

[0039] 100. Interior space; 101. Air outlet. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0042] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90° or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0043] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0044] See also Figures 1 to 4 As shown, according to an embodiment of the present invention, an air conditioner indoor unit is provided, including an air conditioner housing 1. An indoor heat exchanger 2, an indoor fan (not shown in the figure, not labeled; in one specific embodiment, a cross-flow fan) and an auxiliary heater 3 are disposed within the internal space 100 of the air conditioner housing 1. The indoor fan is located on the air outlet side of the indoor heat exchanger 2, enabling it to draw air from the indoor space into the internal space 100 through the air inlet (not shown in the figure, not labeled) of the air conditioner housing 1, exchange heat through the indoor heat exchanger 2, and then send the air back into the indoor space, thereby achieving the desired airflow. The temperature control of the air in the space is achieved by forming an air outlet cavity 101 on the air outlet side of the indoor heat exchanger 2 inside the air conditioner housing 1. The air outlet cavity 101 is specifically formed by an air supply duct in the aforementioned internal space 100. The auxiliary heater 3 has a heating position inside the air outlet cavity 101 and a drag-reducing position outside the air outlet cavity 101. The auxiliary heater 3 can be driven to switch between the heating position and the drag-reducing position. The auxiliary heater 3 can be a commonly used electric heater (such as a PTC ceramic heater).

[0045] In this technical solution, the auxiliary heater 3 has a heating position inside the air outlet cavity 101 and a drag-reducing position outside the air outlet cavity 101, and can be driven to switch between the heating position and the drag-reducing position. Thus, when it is not necessary to heat the air outlet, the auxiliary heater 3 can be driven to move to the drag-reducing position, that is, to switch the auxiliary heater 3 outside the air outlet cavity 101. This eliminates the obstruction of the air outlet by the auxiliary heater 3 being inside the air outlet cavity 101, reduces the air outlet resistance, increases the air outlet volume, and thus improves the heat exchange efficiency of the indoor heat exchanger 2 and the performance of the air conditioner. When it is necessary to heat the air outlet, such as when the air conditioner is running in heating mode, the auxiliary heater 3 is controlled to be inside the air outlet cavity 101 to achieve auxiliary heating of the air outlet, improve the heating performance of the air conditioner, and enhance the user experience.

[0046] In some embodiments, the indoor heat exchanger 2 has a first end face 201 and a second end face 202 on opposite sides of its heat exchange core (not labeled in the figure). The first end face 201 is the end face where the refrigerant manifold 21 of the indoor heat exchanger 2 is located. When the auxiliary heater 3 is in the drag-reducing position, the auxiliary heater 3 is located in the area corresponding to the second end face 202. That is, the second end face 202 is the end face on one side where the heat exchange tube bend of the indoor heat exchanger 2 is located. When the auxiliary heater 3 is in the heating position, the auxiliary heater 3 is located in the air outlet side area of ​​the heat exchange core. It should be noted that the area corresponding to the second end face 202 is in the internal space of the air conditioner casing 1, but it is not the area corresponding to the air outlet side of the heat exchange core, so it will not obstruct the airflow from the heat exchange core.

[0047] In this technical solution, when the auxiliary heater 3 is in the drag-reducing position, it is specifically driven to move to the area corresponding to the second end face 202. Since the second end face 202 is the side end face where the heat exchange tube transition elbow of the indoor heat exchanger 2 is located, rather than the side end face where the refrigerant distribution pipe 21 of the indoor heat exchanger 2 is located, the space is relatively spacious, which can effectively prevent physical interference between the auxiliary heater 3 and the indoor heat exchanger 2, and ensure the structural compactness of the air conditioner indoor unit.

[0048] In some embodiments, the air conditioner housing 1 is further provided with a drive device 4, which is used to drive the auxiliary heater 3 to switch between the heating position and the drag reduction position in a translational sliding manner.

[0049] In this technical solution, the auxiliary heater 3 is driven by the driving device 4 to switch between the heating position and the drag reduction position in a translational sliding manner, which can ensure that the position switching of the auxiliary heater 3 is smooth and stable, and is especially suitable for situations where the auxiliary heater 3 is large in size and mass.

[0050] See details Figure 1 and Figure 2 As shown, in some embodiments, the indoor unit of the air conditioner is a vertical indoor unit (also called a cabinet unit), the height of the auxiliary heater 3 is approximately equal to (can be equal to) the height of the indoor heat exchanger 2, and the drive device 4 has two sets, which are respectively connected to the top and bottom of the auxiliary heater 3.

[0051] In this technical solution, for cases where the height of the indoor heat exchanger 2 is large due to the large height of the vertical indoor unit, a drive device 4 is configured at both the top and bottom of the auxiliary heater 3. This enables reliable position driving and switching of the auxiliary heater 3 with a large mass. At the same time, the synchronous movement of the top and bottom of the auxiliary heater 3 can effectively prevent the tilting phenomenon caused by the top or bottom of the auxiliary heater 3 getting stuck during the position switching process.

[0052] In one specific embodiment, see Figure 3 As shown, the driving device 4 includes a device assembly frame 41 and a rotary drive component 42 mounted on the device assembly frame 41. The device assembly frame 41 is provided with a slider 43 that can be driven to reciprocate by the rotary drive component 42. The slider 43 is fixedly connected to the auxiliary heater 3. Furthermore, the slider 43 is an arc-shaped rack, which is slidably connected to an arc-shaped guide rail (not shown in the figure, not labeled) on the device assembly frame 41. The rotary drive component 42 is a rotary motor (capable of forward and reverse rotation), and the drive gear (not shown in the figure) on the output shaft of the rotary motor meshes with the arc-shaped rack.

[0053] In this technical solution, the arc-shaped rack meshes with the drive gear on the output shaft of the rotary motor, thereby enabling the rotary motor to translate the auxiliary heater 3 in the circumferential direction of the arc-shaped rack, which can further improve the structural compactness of the air conditioner indoor unit.

[0054] According to an embodiment of the present invention, an air conditioner is also provided, including the above-mentioned indoor unit. Since the auxiliary heater 3 has a heating position inside the air outlet cavity 101 and a drag-reducing position outside the air outlet cavity 101 and can be driven to switch between the heating position and the drag-reducing position, when it is not necessary to heat the air outlet, the auxiliary heater 3 can be driven to move to the drag-reducing position, that is, to switch the auxiliary heater 3 outside the air outlet cavity 101, eliminating the obstruction of the air outlet by the auxiliary heater 3 being inside the air outlet cavity 101, reducing the air outlet resistance, increasing the air volume, and thus improving the heat exchange efficiency of the indoor heat exchanger 2 and the performance of the air conditioner. When it is necessary to heat the air outlet, such as when the air conditioner is running in heating mode, the auxiliary heater 3 is controlled to be inside the air outlet cavity 101 to achieve auxiliary heating of the air outlet, improving the heating performance of the air conditioner and enhancing the user experience.

[0055] According to an embodiment of the present invention, a control method for an air conditioner as described above is also provided, comprising the following steps:

[0056] The operating mode of the air conditioner is obtained, including a heating mode and a non-heating mode. The non-heating mode is, for example, one of a cooling mode, a fan mode, and a dehumidification mode.

[0057] When the operating mode is heating mode, it is determined whether the indoor fan is running. If the indoor fan is running, the relationship between the speed Vs of the indoor fan and the preset speed Vy is further determined.

[0058] If Vs < Vy, it means that the indoor fan speed is low. At this time, controlling the auxiliary heater 3 to be in the drag-reducing position can effectively avoid the eddy currents and backflows generated by the auxiliary heater 3 in the air outlet cavity 101, and effectively solve the surge problem caused by the low speed of the air conditioner fan.

[0059] If Vs≥Vy, then it is further determined whether the indoor fan has been running continuously for a period of not less than a first set time t1 (in a specific embodiment, it can be 60s). If so, the auxiliary heater 3 is controlled to be in the heating position; otherwise, the auxiliary heater 3 is controlled to be in the drag reduction position. This can effectively prevent the auxiliary heater 3 from being turned on before the indoor fan is started, which would cause the heat generated by the auxiliary heater 3 to not be dissipated in time, resulting in a sudden rise in the temperature inside the air outlet cavity 101, and thus causing safety hazards.

[0060] In some implementations, when Vs≥Vy, the method further includes: determining whether the following conditions are met: T1≥T2+Ty1, T2<Ty2, and T3<Ty3 is detected for a continuous second set time t2 (indicating that the heat exchange capacity of the indoor heat exchanger 2 is insufficient). If these conditions are met, it indicates that the heat demand is large, and the auxiliary heater 3 is controlled to be in the heating position; otherwise, the auxiliary heater 3 is controlled to be in the drag reduction position. Here, T1 is the set temperature of the air conditioner, T2 is the indoor ambient temperature, T3 is the tube temperature inside the heat exchange tube of the indoor heat exchanger 2, Ty1 is the first preset temperature value, Ty2 is the second preset temperature value, and Ty3 is the third preset temperature value. In a specific embodiment, Ty1 is 4℃, Ty2 is 25℃, Ty3 is 45℃, and t2 is 180s. That is, when Vs≥Vy and the indoor fan has been running continuously for no less than the first set time t1, it is further detected whether the aforementioned conditions are met, and when the aforementioned conditions are met, the auxiliary heater 3 is controlled to be in the heating position. Otherwise, it means that heating is not required. At this time, even if the heating mode is running, the auxiliary heater 3 is also controlled to be in the drag reduction position to ensure the air volume in the heating mode.

[0061] In this technical solution, the heat demand of the indoor space is determined by whether the conditions T1≥T2+Ty1, T2<Ty2, and T3<Ty3 are detected for a second consecutive set time t2. When the aforementioned conditions are met, it indicates that the indoor space has a large demand for heat. At this time, the auxiliary heater 3 is controlled to be energized and moved to the heating position to increase the air outlet temperature and improve the user's comfort.

[0062] In some implementations, when the operating mode is non-heating mode, the auxiliary heater 3 is controlled to be in the drag-reducing position. That is, when the air conditioner is operating in cooling mode, air supply mode or dehumidification mode, the auxiliary heater 3 is placed outside the air outlet cavity 101 to prevent it from causing air resistance in the air outlet cavity 101, thereby ensuring the air volume of the air conditioner, improving heat exchange efficiency, reducing energy consumption and improving energy utilization.

[0063] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. An indoor unit for an air conditioner, characterized in that, The air conditioner includes an air conditioner housing (1), an indoor heat exchanger (2) and an auxiliary heater (3) are provided in the internal space (100) of the air conditioner housing (1), an air outlet cavity (101) is formed in the air conditioner housing (1) on the air outlet side of the indoor heat exchanger (2), the auxiliary heater (3) has a heating position in the air outlet cavity (101) and a drag-reducing position outside the air outlet cavity (101), and the auxiliary heater (3) can be driven to switch between the heating position and the drag-reducing position; the indoor heat exchanger (2) has first end faces (2) on opposite sides of its heat exchange core. 01) and the second end face (202), wherein the first end face (201) is the end face where the refrigerant distribution pipe (21) of the indoor heat exchanger (2) is located; when the auxiliary heater (3) is in the drag reduction position, the auxiliary heater (3) is located in the area corresponding to the second end face (202); when the auxiliary heater (3) is in the heating position, the auxiliary heater (3) is located in the air outlet side area of ​​the heat exchange core; the second end face (202) is the end face where the heat exchange tube transition elbow of the indoor heat exchanger (2) is located; the air conditioning indoor unit is a vertical indoor unit.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, The air conditioner housing (1) is also provided with a drive device (4), which is used to drive the auxiliary heater (3) to switch between the heating position and the drag reduction position in a translational sliding manner.

3. The indoor unit of the air conditioner according to claim 2, characterized in that, The drive device (4) has two sets, and the two sets of drive devices (4) are respectively connected to the top and bottom of the auxiliary heater (3).

4. The indoor unit of the air conditioner according to claim 3, characterized in that, The drive device (4) includes a device assembly frame (41) and a rotary drive component (42) mounted on the device assembly frame (41). The device assembly frame (41) is provided with a slider (43) that can be driven to reciprocate by the rotary drive component (42). The slider (43) is fixedly connected to the auxiliary heater (3).

5. The indoor unit of the air conditioner according to claim 4, characterized in that, The slider (43) is an arc-shaped rack, which is slidably connected to the arc-shaped guide rail on the device assembly frame (41). The rotary drive (42) is a rotary motor, and the drive gear on the output shaft of the rotary motor meshes with the arc-shaped rack.

6. An air conditioner, characterized in that, The indoor unit of the air conditioner includes any one of claims 1 to 5.

7. A control method for an air conditioner as described in claim 6, characterized in that, Includes the following steps: Obtain the operating mode of the air conditioner; When the operating mode is heating mode, it is determined whether the indoor fan is running. If the indoor fan is running, the relationship between the speed Vs of the indoor fan and the preset speed Vy is further determined. If Vs < Vy, then the auxiliary heater (3) is controlled to be in the drag-reducing position; If Vs≥Vy, then it is further determined whether the indoor fan has been running continuously for a time not less than the first set time t1. If so, the auxiliary heater (3) is controlled to be in the heating position; otherwise, the auxiliary heater (3) is controlled to be in the drag reduction position.

8. The control method for an air conditioner according to claim 7, characterized in that, When Vs≥Vy, it also includes: Further determine whether the following conditions are met: T1≥T2+Ty1, T2<Ty2 and T3<Ty3 is detected for a continuous second set time t2. If the conditions are met, control the auxiliary heater (3) to be in the heating position; otherwise, control the auxiliary heater (3) to be in the drag reduction position. Wherein, T1 is the set temperature of the air conditioner, T2 is the indoor ambient temperature, T3 is the tube temperature inside the heat exchange tube of the indoor heat exchanger (2), Ty1 is the first preset temperature value, Ty2 is the second preset temperature value, and Ty3 is the third preset temperature value.

9. The control method for an air conditioner according to claim 7, characterized in that, When the operating mode is non-heating mode, the auxiliary heater (3) is controlled to be in the drag reduction position.

Images