Air conditioner indoor unit and control method thereof

Abstract

The invention relates to an air conditioner indoor unit and a control method thereof, the air conditioner indoor unit comprises a heat exchange box, an indoor heat exchanger, a fan and an electric heating device, and the heat exchange box is provided with an air inlet and an air outlet; the indoor heat exchanger is arranged in the heat exchange box and located on a flow path between the air inlet and the air outlet; air entering the heat exchange box from the air inlet exchanges heat with the indoor heat exchanger and then flows out of the heat exchange box from the air outlet; the fan is arranged between the indoor heat exchanger and the air outlet of the heat exchange box, and the air outlet end of the fan faces the air outlet; the electric heating device is arranged between the indoor heat exchanger and the air inlet end of the fan and used for heating air flowing out of the indoor heat exchanger, and the electric heating device is arranged to be capable of being controlled to provide an avoiding opening for air flowing from the indoor heat exchanger to the air inlet of the fan when the electric heating device does not need to heat the air flowing out of the indoor heat exchanger. According to the technical scheme, the air outlet efficiency of the air outlet can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioning indoor unit and a control method thereof. Background Art

[0002] The computer room air conditioner often installs a heat pump or an auxiliary electric heating device between the indoor heat exchanger and the fan of the indoor unit of the air conditioner. When the weather is cold, the heat pump or the auxiliary electric heating device is started to ensure the warmth of the indoor environment. Taking the auxiliary electric heating device as an electric heater as an example, this heater is usually fixed between the fan and the indoor heat exchanger through a bracket, and the indoor temperature is increased by the fan after heating the gas. However, when the electric heater is not in use, the electric heater and the bracket block the air exchange in the indoor heat exchanger cavity to a certain extent, reducing the cooling efficiency and affecting the use of the indoor unit of the air conditioner. At the same time, when the indoor unit of the air conditioner is turned off by the user after the electric heater is turned on, or when there is a power outage, the electric heater and the fan are turned off at this time, and the residual heat of the electric heater before it cools down cannot be dissipated through the fan. The residual heat will affect the use of other equipment in the indoor unit of the air conditioner, further affecting the use of the indoor unit of the air conditioner. Summary of the invention

[0003] The embodiment of the present application provides an air-conditioning indoor unit and a control method thereof to solve the problem in the related art that an electric heater in the air-conditioning indoor unit may affect the use of the air-conditioning indoor unit.

[0004] According to a first aspect of an embodiment of the present application, an air conditioner indoor unit is provided, comprising:

[0005] A heat exchange box, wherein the heat exchange box is provided with an air inlet and an air outlet;

[0006] An indoor heat exchanger is arranged in the heat exchange box and located on the flow path between the air inlet and the air outlet; the air entering the heat exchange box through the air inlet exchanges heat with the indoor heat exchanger and then flows out of the heat exchange box through the air outlet;

[0007] A fan is arranged between the indoor heat exchanger and the air outlet, and an air outlet end of the fan faces the air outlet;

[0008] An electric heating device is arranged between the indoor heat exchanger and the air inlet end of the fan, and is used to heat the air flowing out of the indoor heat exchanger.

[0009] The electric heating device is configured to be controlled to provide an escape opening for air flowing from the indoor heat exchanger to the air inlet of the fan when the electric heating device is not needed to heat the air flowing out of the indoor heat exchanger.

[0010] Optionally, the air-conditioning indoor unit has a water collecting pan arranged below the indoor heat exchanger, and the electric heating device has a first position located between the air outlet and the air inlet end of the fan, and a second position located below the water collecting pan; the air-conditioning indoor unit also includes an adjustment component for adjusting the position of the electric heating device, including adjusting the electric heating device to the first position or the second position.

[0011] Optionally, the air outlet is opened below the heat exchange box, the water receiving pan is arranged below the indoor heat exchanger and avoids the air outlet, and the adjustment component is used to adjust the position of the electric heating device in the horizontal direction, and the adjustment component includes:

[0012] A mounting assembly, arranged between the water receiving tray and the fan, the electric heating device being arranged on the mounting assembly, and the mounting assembly being used to mount the electric heating device;

[0013] A driving member is arranged between the water receiving tray and the fan, and the driving member is connected to the mounting assembly. The driving member is used to adjust the horizontal position of the electric heating device so that the electric heating device has a first position between the air outlet and the fan and a second position below the water receiving tray.

[0014] Optionally, the mounting assembly includes a slide rail extending in a horizontal direction and a slider slidably disposed on the slide rail, the electric heating device is disposed on the slider, and the driving member is a first telescopic rod disposed on the slide rail and extending in a horizontal direction, and the first telescopic rod is connected to the slider.

[0015] Optionally, the box wall includes a first plate body that is fixedly arranged and a second plate body that is hingedly connected to the first plate body. In the first state, the first plate body and the second plate body jointly seal the heat exchange box. In the second state, the second plate body rotates relative to the first plate body to make the inside of the heat exchange box connected with the outside.

[0016] Optionally, at least one box wall of the heat exchanger box is configured to have a first state for sealing the heat exchanger box and a second state for connecting the inside of the heat exchanger box with the outside. The heat exchanger box also includes a first elastic member and a frame for fixing the box wall. The second plate body is connected to the frame by electromagnetic adsorption. One end of the first elastic member is connected to the second plate body, and the other end is connected to the frame, so as to drive the second plate body to rotate relative to the first plate body when the electromagnetic adsorption fails.

[0017] Optionally, the second plate body is hingedly connected to the first plate body via an elastic hinge.

[0018] Optionally, the indoor heat exchanger has two, including a first indoor heat exchanger and a second indoor heat exchanger each constructed in a plate shape, the first indoor heat exchanger and the second indoor heat exchanger are arranged opposite to each other, and the distance between the edge of the first indoor heat exchanger facing the air inlet and the edge of the second indoor heat exchanger facing the air inlet is smaller than the distance between the edge of the first indoor heat exchanger facing the air outlet and the edge of the second indoor heat exchanger facing the air outlet.

[0019] Optionally, the air conditioner indoor unit includes a second baffle arranged on both sides of the first indoor heat exchanger and the second indoor heat exchanger, the second baffle is movably connected to the first indoor heat exchanger and the second indoor heat exchanger respectively, and the second baffle has a third state for forming a ventilation gap between the first indoor heat exchanger and the second indoor heat exchanger respectively, and a fourth state for respectively adhering to the first indoor heat exchanger and the second indoor heat exchanger.

[0020] Optionally, the second baffle is movably connected to the first indoor heat exchanger and the second indoor heat exchanger respectively through a plurality of second telescopic rods, one end of the plurality of second telescopic rods is connected to the first indoor heat exchanger or the second indoor heat exchanger, and the other end of the plurality of second telescopic rods is connected to the second baffle.

[0021] Optionally, the air-conditioning indoor unit also includes a water receiving pan, which includes a water receiving pan arranged at the bottom of the indoor heat exchanger, for collecting condensed water generated by the indoor heat exchanger; the electric heating device is configured to move to the bottom of the water receiving pan when the electric heating device is not needed to heat the air flowing out of the indoor heat exchanger.

[0022] Optionally, the electric heating device is configured as a ventilated mesh or grating or hollow body.

[0023] Optionally, the fan is a centrifugal fan.

[0024] Optionally, the electric heating device comprises a first heating element and a second heating element, and the first heating element and the second heating element are movably or rotatably arranged side by side to jointly constitute a heating surface.

[0025] Optionally, the indoor heat exchanger has a first bottom and a second bottom and an upwardly protruding bent portion between the first bottom and the second bottom, and the water receiving pan includes a first water receiving pan and a second water receiving pan, wherein the first water receiving pan is arranged below the first bottom and the second water receiving pan is arranged below the second bottom; the electric heating device includes a first heating element and a second heating element, and when the electric heating device is needed to heat the air flowing out of the indoor heat exchanger, the first heating element and the second heating element are located between the first water receiving pan and the second water receiving pan, together forming a heating surface and opposite to the indoor heat exchanger, and when the electric heating device is not needed to heat the air flowing out of the indoor heat exchanger, the first heating element rotates and / or moves to below the first water receiving pan, and the second heating element rotates and / or moves to below the second water receiving pan.

[0026] According to a second aspect of an embodiment of the present application, a control method for an air-conditioning indoor unit as described in any one of the above is provided, the method comprising:

[0027] Obtaining the air outlet temperature of the air conditioner indoor unit and starting the electric heating device;

[0028] When the air outlet temperature is less than a first preset value, controlling the speed of the fan to be a first speed;

[0029] When the air outlet temperature reaches a first preset value, the rotation speed of the fan is controlled to be a second rotation speed, wherein the second rotation speed is greater than the first rotation speed.

[0030] Optionally, when the air-conditioning indoor unit and the electric heating device are started, the rotation speed of the fan is controlled to increase from 0 to a first rotation speed.

[0031] Optionally, when the air-conditioning indoor unit is running and the electric heating device is started, the rotation speed of the fan is controlled to increase or decrease to a first rotation speed.

[0032] Optionally, the method further includes: when the air outlet temperature is less than a second preset value, controlling the air conditioner indoor unit to report an error, wherein the second preset value is less than the first preset value.

[0033] The solution provided by the present invention has the following beneficial effects compared with the prior art:

[0034] Through the above technical scheme, when the air-conditioning indoor unit needs an electric heating device to ensure the warmth of the indoor environment, the electric heating device may not provide an escape port to ensure the heating effect on the air. When the electric heating device is not needed to heat the air flowing out of the indoor heat exchanger, the electric heating device can be controlled to provide an escape port for the air flowing from the indoor heat exchanger to the air inlet of the fan. In this way, the electric heating device can be prevented from blocking the air outlet, making the gas circulation between the indoor heat exchanger and the fan smoother, ensuring the air outlet efficiency of the air outlet, and avoiding the influence of the electric heating device on the use of the air-conditioning indoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0036] Figure 1 is a structural schematic diagram of an air-conditioning indoor unit provided by an embodiment of the present invention;

[0037] Figure 2 is a front view of an air conditioner indoor unit provided by an embodiment of the present invention;

[0038] Figure 3 is a side view of an air conditioner indoor unit provided by an embodiment of the present invention;

[0039] Figure 4 is a schematic diagram of the structure of an installation assembly provided by an embodiment of the present invention;

[0040] Figure 5 It is a flowchart of a control method provided in an embodiment of the present application;

[0041] Figure 6 It is a flowchart of another control method provided in an embodiment of the present application.

[0042] In the figure: 1-air conditioner indoor unit, 11-heat exchange box, 121-first indoor heat exchanger, 122-second indoor heat exchanger, 13-air inlet, 2-water tray, 3-electric heating device, 41-installation assembly, 42-slide rail, 43-slider, 44-first telescopic rod, 5-first plate body, 6-second plate body, 61-elastic hinge, 7-second baffle, 71-ventilation gap, 72-second telescopic rod, 8-fan.

[0043] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0045] It should be understood that the "multiple" mentioned herein refers to two or more. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in order to facilitate the clear description of the technical solution of the embodiments of the present application, in the embodiments of the present application, the words "first", "second" and the like are used to distinguish between the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not limit them to be necessarily different.

[0046] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0047] According to a first aspect of an embodiment of the present application, an air conditioner indoor unit is provided, such as Figures 1 to 4 As shown, the indoor unit of the air conditioner includes a heat exchange box 11, an indoor heat exchanger, a fan 8 and an electric heating device 3. The heat exchange box 11 is provided with an air inlet 13 and an air outlet. The indoor heat exchanger is arranged in the heat exchange box 11 and is located on the flow path between the air inlet 13 and the air outlet. The air entering the heat exchange box 11 through the air inlet 13 exchanges heat with the indoor heat exchanger and then flows out of the heat exchange box 11 through the air outlet. The fan 8 is arranged between the indoor heat exchanger and the air outlet of the heat exchange box 11, and the air outlet end of the fan 8 faces the air outlet. The electric heating device 3 is arranged between the indoor heat exchanger and the air inlet end of the fan 8, and is used to heat the air flowing out of the indoor heat exchanger. The electric heating device 3 is configured as follows: when the electric heating device 3 is not needed to heat the air flowing out of the indoor heat exchanger, it can be controlled to provide an escape for the air flowing from the indoor heat exchanger to the air inlet 13 of the fan 8.

[0048] Through the above technical scheme, when the air-conditioning indoor unit needs the electric heating device 3 to ensure the warmth of the indoor environment, the electric heating device 3 may not provide an escape port to ensure the heating effect on the air; when the electric heating device 3 is not needed to heat the air flowing out of the indoor heat exchanger, the electric heating device 3 can be controlled to provide an escape port for the air flowing from the indoor heat exchanger to the air inlet 13 of the fan 8. In this way, the electric heating device 3 can be prevented from blocking the air outlet, so that the gas circulation between the indoor heat exchanger and the fan 8 is smoother, thereby ensuring the air outlet efficiency of the air outlet and avoiding the electric heating device 3 from affecting the use of the air-conditioning indoor unit.

[0049] In some embodiments, the air conditioner indoor unit may have a water tray 2 disposed below the indoor heat exchanger, and the electric heating device 3 may have a first position between the air outlet and the air inlet end of the fan 8 and a second position below the water tray 2; the air conditioner indoor unit also includes an adjustment component for adjusting the position of the electric heating device 3, including adjusting the electric heating device 3 to the first position or the second position. It should be noted that the above and below mentioned above or below are described with the air conditioner indoor unit in a normal placement state. For details, please refer to Figure 2 and Figure 3 , taking the air conditioner indoor unit placed normally on the ground as an example, Figure 2 and Figure 3 In the embodiment, the upper part of the indoor unit of the air conditioner or the upper part of the heat exchange box 11 is Figure 2 The upper part of the drawing, the lower part of the air conditioner indoor unit or the lower part of the heat exchange box 11 is Figure 2 Below the drawing direction.

[0050] Specifically, the water tray 2 can be arranged below the indoor heat exchanger and avoid the air outlet. The adjustment component is used to adjust the horizontal position of the electric heating device 3. The adjustment component includes: a mounting component 41, which is arranged between the water tray 2 and the fan 8, and the electric heating device 3 is arranged on the mounting component 41. The mounting component 41 is used to install the electric heating device 3; a driving member, which is arranged between the water tray 2 and the fan 8, and the driving member is connected to the mounting component 41. The driving member is used to adjust the horizontal position of the electric heating device 3 so that the electric heating device 3 has a first position between the air outlet and the fan 8 and a second position below the water tray 2. The electric heating device 3 has a first position between the air outlet and the air inlet end of the fan 8, and the electric heating device 3 can adjust its own position through the adjustment component. When the air conditioner indoor unit needs the electric heating device 3 to ensure the warmth of the indoor environment, the electric heating device 3 can be moved to the first position through the adjustment component to heat the air that needs to flow out of the air outlet. When the air conditioner indoor unit needs to be started but the electric heating device 3 is not needed, the electric heating device 3 can be moved to the second position by adjusting the assembly, so that the electric heating device 3 can be prevented from blocking the air outlet, so that the gas flow between the indoor heat exchanger and the fan 8 is smoother, the air outlet efficiency of the air outlet is ensured, and the electric heating device 3 is prevented from affecting the use of the air conditioner indoor unit. When the electric heating device 3 is moved to the second position by adjusting the assembly, the electric heating device 3 in the second position is started, and the electric heating device 3 can dry the water in the water tray 2 to prevent the water in the water tray 2 from overflowing. When the temperature is low, the water in the water tray 2 will condense into ice. At this time, the electric heating device 3 in the second position is started, and the electric heating device 3 can first melt the ice in the water tray 2 into water to ensure the use of the water tray 2, and then further dry the water to prevent the water in the water tray 2 from overflowing and affecting the use of the air conditioner indoor unit.

[0051] The water receiving tray 2 can be arranged below the indoor heat exchanger and avoid the air outlet. The adjustment component is used to adjust the horizontal position of the electric heating device 3. The adjustment component includes a mounting component 41 and a driving component. The mounting component 41 is arranged between the water receiving tray 2 and the fan 8. The electric heating device 3 is arranged on the mounting component 41. The mounting component 41 is used to install the electric heating device 3; the driving component is arranged between the water receiving tray 2 and the fan 8. The driving component is connected to the mounting component 41. The driving component is used to adjust the horizontal position of the electric heating device 3 so that the electric heating device 3 has a first position between the air outlet and the fan 8 and a second position below the water receiving tray 2. The condensed water flowing out of the indoor heat exchanger will drip downward due to gravity, so the water tray 2 needs to be set below the indoor heat exchanger. When the air outlet is opened below the heat exchange box 11, the fan 8 also needs to be set below the indoor heat exchanger accordingly. In this way, the arrangement of the water tray 2 and the fan 8 will be closer, and the first position and the second position of the electric heating device 3 can be in the same plane in the horizontal direction. The distance between the first position and the second position of the electric heating device 3 is closer, which is more convenient for moving and adjusting the electric heating device 3. At the same time, it also reduces the volume of the adjustment component and the installation space required for the adjustment component, which is more convenient for the arrangement of the adjustment component and further avoids the blocking of the air outlet by the adjustment component.

[0052] In some embodiments, the mounting assembly 41 may include a slide rail 42 extending in the horizontal direction and a slider 43 slidably disposed on the slide rail 42, the electric heating device 3 is disposed on the slider 43, and the driving member is a first telescopic rod 44 disposed on the slide rail 42 and extending in the horizontal direction, and the first telescopic rod 44 is connected to the slider 43. When the first telescopic rod 44 is extended in the horizontal direction, it can drive the slider 43 to move horizontally on the slide rail 42, and the first telescopic rod 44 indirectly drives the electric heating device 3 to move in the horizontal direction through the slider 43, so as to adjust the position of the electric heating device 3 in the horizontal direction. In other embodiments, the driving member may also be a driving motor, which is disposed on the slider 43, and the slider 43 is provided with a pulley capable of contacting the slide rail 42, and the driving motor drives the pulley to rotate, and when the pulley rotates, it generates a contact force with the slide rail 42, and drives the slider 43 to move on the slide rail 42, so as to adjust the position of the electric heating device 3 in the horizontal direction. In other embodiments, the driving member is a driving motor, the output shaft of the driving motor extends in the horizontal direction, the driving member also includes a first rod body and a first threaded rod arranged in parallel and spaced apart in the horizontal direction, the first threaded rod is coaxially connected to the output shaft of the driving motor, wherein a first mounting hole and a first threaded hole are provided on the slider 43, the slider 43 is slidably mounted on the first rod body through the first mounting hole, and the slider 43 is mounted on the first threaded rod through the first threaded hole, so that when the driving motor drives the first threaded rod to rotate, since the slider 43 is restricted from rotating by the first rod body, at this time, the slider 43 can move in the horizontal direction to adjust the horizontal position of the electric heating device 3. In the present application, the structure of the adjustment component is not limited, and in addition to the three methods mentioned above, other methods can also be used, as long as the electric heating device 3 can be adjusted so that the electric heating device 3 can be moved to the first position and the second position.

[0053] At the same time, at least one wall of the heat exchange box 11 is set to have a first state of sealing the heat exchange box 11 and a second state of connecting the inside of the heat exchange box 11 with the outside. The wall may include a first plate body 5 that is fixed and a second plate body 6 that is hingedly connected to the first plate body 5. In the first state, the first plate body 5 and the second plate body 6 jointly seal the heat exchange box 11. In the second state, the second plate body 6 rotates relative to the first plate body 5 to connect the inside of the heat exchange box 11 with the outside. In the first state, the first plate body 5 and the second plate body 6 jointly seal the heat exchange box 11 to ensure that the inside of the heat exchange box 11 is isolated from the outside, and can be dustproof, waterproof, and heat-insulating. In the second state, the second plate body 6 rotates relative to the first plate body 5 to connect the inside of the heat exchange box 11 with the outside. In this way, ventilation can be achieved under the second state, which promotes the waste heat of the electric heating device 3 in the air-conditioning indoor unit to be lost as soon as possible. When the air conditioner indoor unit is turned off by the user after the electric heater is turned on, or when an emergency such as a power outage causes the electric heater and fan 8 in use to be turned off, the box wall can be set to the second state at this time, so that the inside of the heat exchange box 11 is connected to the outside, and the outside air can enter the heat exchange box 11 and promote the air flow of the heat exchange box 11. The residual heat of the electric heater before it cools down can be quickly dissipated, avoiding the residual heat of the electric heater before it cools down from affecting the use of other equipment in the air conditioner indoor unit, and further avoiding the electric heating device from affecting the use of the air conditioner indoor unit. When the air conditioner fan 8 uses normal cooling, the box wall can be set to the first state to ensure that the air after heat exchange in the indoor heat exchanger will only flow out from the air outlet, ensuring the normal use of the air conditioner indoor unit.

[0054] The heat exchange box 11 may also include a first elastic member and a frame for fixing the box wall. The second plate 6 is connected to the frame by electromagnetic adsorption. One end of the first elastic member is connected to the second plate 6, and the other end is connected to the frame, which is used to drive the second plate 6 to rotate relative to the first plate 5 when the electromagnetic adsorption fails. The connection by electromagnetic adsorption usually requires a coil and a magnetic member that can be energized. The coil is set on one of the frame and the second plate 6, and the magnetic member is set on the other of the frame and the second plate 6. When the box wall needs to be in the first state, the coil is energized, so that the second plate 6 can be connected to the frame, and the first plate 5 and the second plate 6 can seal the heat exchange box 11 together. When the box wall needs to be in the second state, the coil is de-energized, so that the coil loses its magnetism, that is, the electromagnetic adsorption fails. At this time, the second plate 6 can rotate relative to the first plate 5, so that the inside of the heat exchange box 11 is connected to the outside.

[0055] Furthermore, the second plate body 6 and the first plate body 5 can be hingedly connected by an elastic hinge 61. The elastic hinge 61 is a special hinge structure that uses the elastic deformation of the elastic member to achieve the hinge function. The component can be rotated without the need for any additional structure. When the second plate body 6 and the first plate body 5 are hingedly connected by the elastic hinge 61, taking the above-mentioned electromagnetic adsorption as an example, when the coil is energized, the box wall is in the first state. In the first state, the elastic member in the elastic hinge 61 can be deformed by force. When the electromagnetic adsorption fails, the elasticity of the deformed elastic member can drive the second plate body 6 to rotate, so that the second plate body 6 can be rotated relative to the first plate body 5 without the need for any additional structure, ensuring that the box wall can be in the second state. At the same time, the elasticity of the elastic hinge 61 can also prevent the second plate body 6 from shaking when the box wall is in the second state, thereby ensuring the stability of the second plate body 6 when the box wall is in the second state.

[0056] In some embodiments, there may be two indoor heat exchangers, including a first indoor heat exchanger 121 and a second indoor heat exchanger 122, which are respectively constructed in the shape of plates. The first indoor heat exchanger 121 and the second indoor heat exchanger 122 are arranged opposite to each other, and the distance between the edge of the first indoor heat exchanger 121 facing the air inlet 13 and the edge of the second indoor heat exchanger 122 facing the air inlet 13 is smaller than the distance between the edge of the first indoor heat exchanger 121 facing the air outlet and the edge of the second indoor heat exchanger 122 facing the air outlet. In this way, the first indoor heat exchanger 121 and the second indoor heat exchanger 122 can form an eight-shaped arrangement. Compared with the side-by-side arrangement of two indoor heat exchangers, this eight-shaped arrangement prevents the occupied space from being smaller, and the air outlet can be set larger, the air intake of the fan 8 is increased, and the heat exchange efficiency of the air conditioner indoor unit is further increased. At the same time, this eight-shaped arrangement can also make the contact area between the fins of the first indoor heat exchanger 121 and the fins of the second indoor heat exchanger 122 and the air larger, thereby improving the heat exchange efficiency of the indoor heat exchanger. In addition, Figure 1 and Figure 2 Taking the arrangement shown in as an example, assuming that the action range of the fan 8 is a circle with a certain radius, the effect of the suction of the fan 8 will continue to decrease as the action position of the suction of the fan 8 continues to move away from the center of the circle. When the air-conditioning indoor unit is used normally and cooling is performed, the refrigerated air at the bottom of the heat exchanger box 11 is more easily brought out by the fan 8, while the refrigerated air at the top of the heat exchanger box 11 is not easily brought out by the fan 8. When the first indoor heat exchanger 121 and the second indoor heat exchanger 122 can form an eight-shaped shape, the size of the indoor heat exchanger in the up and down directions can be shortened, and the gas in the heat exchanger box 11 can be mostly present in the bottom of the heat exchanger box 11, so that the refrigerated air is more easily brought out by the fan 8, thereby increasing the heat exchange efficiency of the air-conditioning indoor unit and the heat exchange efficiency of the indoor heat exchanger.

[0057] Meanwhile, the air conditioner indoor unit 1 may include a second baffle 7 disposed on both sides of the first indoor heat exchanger 121 and the second indoor heat exchanger 122, the second baffle 7 being movably connected to the first indoor heat exchanger 121 and the second indoor heat exchanger 122, respectively, and the second baffle 7 having a third state for forming a ventilation gap 71 between the first indoor heat exchanger 121 and the second indoor heat exchanger 122, respectively, and a fourth state for respectively fitting the first indoor heat exchanger 121 and the second indoor heat exchanger 122. When the air conditioner indoor unit is used normally and performs cooling, the first baffle 7 and the second baffle 7 may be in the fourth state for fitting the first indoor heat exchanger 121 and the second indoor heat exchanger 122, respectively, so that no gap is formed on both sides of the first indoor heat exchanger 121 and the second indoor heat exchanger 122, and the air that has not been heat exchanged will only pass through the indoor heat exchanger and then be discharged from the air outlet, thereby preventing the air that has not been heat exchanged from being discharged from the air outlet through the gaps on both sides of the first indoor heat exchanger 121 and the second indoor heat exchanger 122. When it is necessary to discharge the waste heat of the electric heating device 3, the first baffle and the second baffle 7 can be in a third state in which a ventilation gap 71 is formed between the first indoor heat exchanger 121 and the second indoor heat exchanger 122 respectively. In this way, more air can enter the space between the two indoor heat exchangers from the ventilation gap 71 and be discharged from the air outlet, thereby increasing the air flow in the heat exchanger box 11 and allowing the waste heat of the electric heating device 3 to be quickly dissipated.

[0058] In some embodiments, the second baffle 7 can be movably connected to the first indoor heat exchanger 121 and the second indoor heat exchanger 122 respectively through a plurality of second telescopic rods 72, one end of the plurality of second telescopic rods 72 is connected to the first indoor heat exchanger 121 or the second indoor heat exchanger 122, and the other end of the plurality of second telescopic rods 72 is connected to the second baffle 7. The second telescopic rod 72 can be remotely controlled, and when it is detected that the waste heat of the heater needs to be dissipated, the second telescopic rod 72 can be remotely controlled to be extended or retracted. In addition to the second telescopic rod 72, when the second baffle 7 is connected to the first indoor heat exchanger 121 and the second indoor heat exchanger 122, the electromagnetic adsorption principle mentioned above can also be used for connection, so that when the coil is powered on, the second baffle 7 is in the fourth state of being respectively attached to the first indoor heat exchanger 121 and the second indoor heat exchanger 122, and when the coil is powered off, the second baffle 7 is in the third state of forming a ventilation gap 71 between the first indoor heat exchanger 121 and the second indoor heat exchanger 122.

[0059] The indoor unit of the air conditioner may further include a water receiving pan 2, which includes a water receiving pan 2 arranged at the bottom of the indoor heat exchanger and is used to collect condensed water generated by the indoor heat exchanger; the electric heating device 3 is configured such that when the electric heating device 3 is not needed to heat the air flowing out of the indoor heat exchanger, the electric heating device 3 moves to the bottom of the water receiving pan 2. In this way, when the electric heating device 3 moves to the bottom of the water receiving pan 2 through the adjustment component, the electric heating device 3 is started, and the electric heating device 3 can dry the water in the water receiving pan 2 to prevent the water in the water receiving pan 2 from overflowing. When the temperature is low, the water in the water receiving pan 2 will condense into ice. At this time, the electric heating device 3 is started, and the electric heating device 3 can first melt the ice in the water receiving pan 2 into water to ensure the use of the water receiving pan 2, and then further dry the water to prevent the water in the water receiving pan 2 from overflowing and affecting the use of the indoor unit of the air conditioner.

[0060] The electric heating device 3 can be configured as a ventilated mesh or bar grid or hollow body. Like this, while guaranteeing to heat the air, the contact area with the air is increased, and the circulation of the air is also facilitated.

[0061] The electric heating device 3 may include a first heating element and a second heating element, which are movably or rotatably arranged side by side to form a heating surface. In this way, when one of the heating elements is damaged, the entire electric heating device 3 does not need to be replaced, which makes it easier to maintain the electric heating device 3.

[0062] In some embodiments, the indoor heat exchanger has a first bottom and a second bottom and an upwardly protruding bent portion between the first bottom and the second bottom, the water receiving tray 2 includes a first water receiving tray and a second water receiving tray, wherein the first water receiving tray is arranged below the first bottom, and the second water receiving tray is arranged below the second bottom; the electric heating device 3 includes a first heating element and a second heating element, when the electric heating device 3 is required to heat the air flowing out of the indoor heat exchanger, the first heating element and the second heating element are located between the first water receiving tray and the second water receiving tray, together forming a heating surface and opposite to the indoor heat exchanger, when the electric heating device 3 is not required to heat the air flowing out of the indoor heat exchanger, the first heating element rotates and / or moves to the bottom of the first water receiving tray, and the second heating element rotates and / or moves to the bottom of the second water receiving tray. In this way, the first heating element and the second heating element can adjust their own positions to the bottom of the water receiving tray by rotating and moving. In this application, the movement mode of the electric heating device 3 is not limited, as long as it can ensure that its own position can move to a suitable position.

[0063] According to the second aspect of the embodiment of the present application, Figure 5 and Figure 6 As shown, a control method for an air conditioner indoor unit of any of the above embodiments is provided, and the control method includes:

[0064] Step S100: Obtain the outlet air temperature of the air conditioner indoor unit and start the electric heating device. The air conditioner indoor unit starts the electric heating device, which means that the air conditioner indoor unit needs to ensure the warmth of the environment. At this time, the electric heating device will be in the first position, so that the speed of the fan 8 is selectively adjusted according to the outlet air temperature of the air conditioner indoor unit to ensure the warmth of the environment.

[0065] Step S200: When the outlet air temperature is less than the first preset value, the speed of the fan 8 is controlled to be the first speed. Step S300: When the outlet air temperature reaches the first preset value, the speed of the fan 8 is controlled to be the second speed, wherein the second speed is greater than the first speed. When the electric heating device is just started, the temperature of the electric heating device will rise slowly. After a period of time, the temperature of the electric heating device can rise to a predetermined temperature, and further, the outlet air temperature can be raised to a predetermined temperature. The first preset value here can be a predetermined temperature of the outlet air temperature. When the outlet air temperature is less than the first preset value, it means that the temperature of the electric heating device has not risen to a predetermined height at this time. At this time, it is necessary to control the speed of the fan 8 to be a first speed less than the second speed. When the fan 8 is at the first speed, it can ensure that the heat of the electric heating device will not accumulate at the position of the electric heating device during the temperature rise process to affect other components in the air conditioner indoor unit, and the heat of the electric heating device will not be lost too quickly, so that the temperature of the electric heating device can be raised to a predetermined temperature as soon as possible, and further, the outlet air temperature can also be raised to a predetermined temperature as soon as possible. When the outlet air temperature has reached the first preset value, it means that the temperature of the electric heating device has also risen to the predetermined temperature. At this time, the speed of the fan 8 can be increased to a second speed greater than the first speed, so that the heated air can be brought out of the air outlet as quickly as possible by the fan 8. It should be noted that the speed of the fan 8 mentioned above can be understood as the speed of the fan blades in the fan 8.

[0066] When the air conditioner indoor unit and the electric heating device are started, the speed of the fan 8 can be controlled to increase from 0 to the first speed. At this time, when the air conditioner indoor unit has just been started and the environment needs to be kept warm, the electric heating device can be moved to the first position first. Since the air conditioner indoor unit has just been started, the fan 8 is also in a state of just being started. At this time, the speed of the fan 8 can be controlled to increase from 0 to the first speed.

[0067] When the air conditioner indoor unit is running and the electric heating device is started, the speed of the fan 8 can be controlled to increase or decrease to the first speed. When the air conditioner indoor unit is running and the environment needs to be kept warm, the electric heating device can be moved to the first position and started. At this time, since the air conditioner indoor unit is still running, the fan 8 is still running. At this time, according to the speed of the fan 8 running at this time, the speed of the fan 8 can be selectively controlled to increase to the first speed or to decrease to the first speed.

[0068] The method may further include step S400: when the air outlet temperature is less than a second preset value, controlling the air conditioner indoor unit to report an error, wherein the second preset value is less than the first preset value. When the air outlet temperature is too low, it indicates that the electric heating device in the air conditioner indoor unit is invalid and cannot heat the air. At this time, the air conditioner indoor unit needs to be controlled to report an error to remind the staff to repair the air conditioner indoor unit.

[0069] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0070] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. An air conditioner indoor unit, characterized in that: include: A heat exchange box (11), wherein the heat exchange box (11) is provided with an air inlet (13) and an air outlet; An indoor heat exchanger is arranged in the heat exchange box (11) and is located on the flow path between the air inlet (13) and the air outlet; air entering the heat exchange box (11) through the air inlet (13) exchanges heat with the indoor heat exchanger and then flows out of the heat exchange box (11) through the air outlet; A fan (8) is arranged between the indoor heat exchanger and the air outlet, and the air outlet end of the fan (8) faces the air outlet; The electric heating device (3) is arranged between the indoor heat exchanger and the air inlet end of the fan (8) and is used to heat the air flowing out of the indoor heat exchanger. The electric heating device (3) is configured such that, when the electric heating device (3) is not needed to heat the air flowing out of the indoor heat exchanger, it can be controlled to provide an escape opening for the air flowing from the indoor heat exchanger to the air inlet (13) of the fan (8).

2. The air conditioner indoor unit according to claim 1, characterized in that: The air conditioner indoor unit has a water receiving tray (2) arranged below the indoor heat exchanger, and the electric heating device (3) has a first position located between the air outlet and the air inlet end of the fan (8) and a second position located below the water receiving tray (2); the air conditioner indoor unit also includes an adjustment component for adjusting the position of the electric heating device (3), including adjusting the electric heating device (3) to the first position or the second position.

3. The air conditioner indoor unit according to claim 2, characterized in that: The air outlet is opened below the heat exchange box (11), the water receiving tray (2) is arranged below the indoor heat exchanger and avoids the air outlet, and the adjustment component is used to adjust the position of the electric heating device (3) in the horizontal direction, and the adjustment component comprises: A mounting assembly (41) is arranged between the water receiving tray (2) and the fan (8), the electric heating device (3) is arranged on the mounting assembly (41), and the mounting assembly (41) is used to mount the electric heating device (3); A driving member is arranged between the water receiving tray (2) and the fan (8), the driving member is connected to the mounting assembly (41), and the driving member is used to adjust the position of the electric heating device (3) in the horizontal direction so that the electric heating device (3) has a first position between the air outlet and the fan (8) and a second position below the water receiving tray (2).

4. The air conditioner indoor unit according to claim 3, characterized in that: The mounting assembly (41) comprises a slide rail (42) extending in a horizontal direction and a slider (43) slidably arranged on the slide rail (42); the electric heating device (3) is arranged on the slider (43); the driving member is a first telescopic rod (44) arranged on the slide rail (42) and extending in a horizontal direction; the first telescopic rod (44) is connected to the slider (43).

5. The air conditioner indoor unit according to claim 1, characterized in that: At least one box wall of the heat exchange box (11) is configured to have a first state in which the heat exchange box (11) is sealed and a second state in which the interior of the heat exchange box (11) is in communication with the exterior. The box wall comprises a first plate body (5) which is fixedly arranged and a second plate body (6) which is hingedly connected to the first plate body (5). In the first state, the first plate body (5) and the second plate body (6) jointly seal the heat exchange box (11). In the second state, the second plate body (6) rotates relative to the first plate body (5) so that the interior of the heat exchange box (11) is in communication with the exterior.

6. The air conditioner indoor unit according to claim 5, characterized in that: The heat exchange box (11) further comprises a first elastic member and a frame for fixing the box wall, the second plate body (6) is connected to the frame by electromagnetic adsorption, one end of the first elastic member is connected to the second plate body (6), and the other end is connected to the frame, and is used to drive the second plate body (6) to rotate relative to the first plate body (5) when the electromagnetic adsorption fails.

7. The air conditioner indoor unit according to claim 5, characterized in that: The second plate body (6) is hingedly connected to the first plate body (5) via an elastic hinge (61).

8. The air conditioner indoor unit according to claim 1, characterized in that: The indoor heat exchangers include two, including a first indoor heat exchanger (121) and a second indoor heat exchanger (122) each of which is constructed in a plate shape. The first indoor heat exchanger (121) and the second indoor heat exchanger (122) are arranged opposite to each other, and the distance between the edge of the first indoor heat exchanger (121) facing the air inlet (13) and the edge of the second indoor heat exchanger (122) facing the air inlet (13) is smaller than the distance between the edge of the first indoor heat exchanger (121) facing the air outlet and the edge of the second indoor heat exchanger (122) facing the air outlet.

9. The air conditioner indoor unit according to claim 8, characterized in that: The air conditioner indoor unit comprises a second baffle (7) arranged on both sides of the first indoor heat exchanger (121) and the second indoor heat exchanger (122), the second baffle (7) being movably connected to the first indoor heat exchanger (121) and the second indoor heat exchanger (122), respectively, and the second baffle (7) having a third state for forming a ventilation gap (71) between the first indoor heat exchanger (121) and the second indoor heat exchanger (122), respectively, and a fourth state for respectively adhering to the first indoor heat exchanger (121) and the second indoor heat exchanger (122).

10. The air conditioner indoor unit according to claim 9, characterized in that: The second baffle (7) is movably connected to the first indoor heat exchanger (121) and the second indoor heat exchanger (122) respectively via a plurality of second telescopic rods (72), one end of the plurality of second telescopic rods (72) is connected to the first indoor heat exchanger (121) or the second indoor heat exchanger (122), and the other end of the plurality of second telescopic rods (72) is connected to the second baffle (7).

11. The air conditioner indoor unit according to claim 1, characterized in that: The air conditioner indoor unit also includes a water receiving pan (2) assembly, wherein the water receiving pan (2) assembly includes a water receiving pan (2) arranged at the bottom of the indoor heat exchanger and used to collect condensed water generated by the indoor heat exchanger; the electric heating device (3) is configured such that when the electric heating device (3) is no longer needed to heat the air flowing out of the indoor heat exchanger, the electric heating device (3) moves to the bottom of the water receiving pan (2).

12. The air conditioner indoor unit according to claim 1, characterized in that: The electric heating device (3) is configured as a ventilated mesh or grid or hollow body.

13. The air conditioner indoor unit according to claim 1, characterized in that: The electric heating device (3) comprises a first heating element and a second heating element, wherein the first heating element and the second heating element are arranged side by side in a movable or rotatable manner to jointly form a heating surface.

14. The air conditioner indoor unit according to claim 13, characterized in that: The indoor heat exchanger comprises a first bottom, a second bottom and an upwardly protruding bent portion located between the first bottom and the second bottom, the water receiving tray (2) comprises a first water receiving tray and a second water receiving tray, wherein the first water receiving tray is arranged below the first bottom and the second water receiving tray is arranged below the second bottom; the electric heating device (3) comprises a first heating element and a second heating element, when the electric heating device (3) is required to heat the air flowing out of the indoor heat exchanger, the first heating element and the second heating element are located between the first water receiving tray and the second water receiving tray, together forming a heating surface and opposite to the indoor heat exchanger, when the electric heating device (3) is not required to heat the air flowing out of the indoor heat exchanger, the first heating element rotates and / or moves to the bottom of the first water receiving tray, and the second heating element rotates and / or moves to the bottom of the second water receiving tray.

15. The air conditioner indoor unit according to claim 1, characterized in that: The fan (8) is a centrifugal fan.

16. A control method for an air-conditioning indoor unit according to any one of claims 1 to 15, characterized in that: The method comprises: Obtaining the air outlet temperature of the air conditioner indoor unit and starting the electric heating device (3); When the air outlet temperature is less than a first preset value, controlling the rotation speed of the fan (8) to be a first rotation speed; When the air outlet temperature reaches a first preset value, the rotation speed of the fan (8) is controlled to be a second rotation speed, wherein the second rotation speed is greater than the first rotation speed.

17. The control method according to claim 16, characterized in that: When the air conditioner indoor unit and the electric heating device are started, the rotation speed of the fan (8) is controlled to increase from 0 to a first rotation speed.

18. The control method according to claim 17, characterized in that: When the air conditioner indoor unit is running and the electric heating device is started, the rotation speed of the fan (8) is controlled to increase or decrease to a first rotation speed.

19. The control method according to claim 18, characterized in that: The method further includes: when the air outlet temperature is less than a second preset value, controlling the air conditioner indoor unit to report an error, wherein the second preset value is less than the first preset value.

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