Electric heating system, air conditioner indoor unit, split type air conditioner and control method

Abstract

The invention discloses an electric heating system, an air conditioner indoor unit, a split-type air conditioner and a control method, the electric heating system is applied to the air conditioner indoor unit, an evaporator is arranged in the air conditioner indoor unit, the electric heating system comprises an electric heating assembly and a control assembly, the electric heating assembly is arranged below the evaporator, and the control assembly comprises a driving part, a heating part and a control part; the action piece is connected with the driving piece, and the driving piece can drive the action piece to move so as to drive the electric heating assembly to move up and down; and the control part is connected with the driving part and used for controlling the driving part to start and stop according to different working modes of the air conditioner indoor unit. According to the embodiment of the invention, the position adjustment of the electric heating assembly in different working modes is realized, the problem that the electric heating assembly at a fixed position obstructs airflow in a refrigeration mode is solved, the refrigeration effect is further improved, the noise is reduced, and the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of split-type air conditioners, and in particular to an electric heating system, an air conditioner indoor unit, a split-type air conditioner and a control method. Background Art

[0002] In existing split-type air conditioners, the electric heating components are generally fixed and usually located in the middle position below the evaporator to balance the heating effect in the heating mode and the cooling effect in the cooling mode. However, in actual operation, it often results in a situation where the best effect cannot be achieved in both the heating mode and the cooling mode. For example, in the heating mode, the electric heating component is in the middle position and cannot evenly heat the passing air. In the cooling mode, the airflow on both sides of the evaporator will converge in the middle. Since the electric heating component is still in the middle position, it will hinder the normal flow of the airflow and cause the formation of vortices. The formation of vortices will not only cause uneven airflow distribution, so that some areas cannot get sufficient cold air, but other areas may be over-cooled, seriously reducing the cooling effect, but also produce obvious abnormal noises, affecting the user experience. Summary of the invention

[0003] The object of the present invention is to provide an electric heating system, an air-conditioner indoor unit, a split air-conditioner and a control method, aiming to solve the problem in the prior art that the electric heating component is fixed in position under different working modes of the air-conditioner indoor unit, resulting in reduced cooling and heating effects of the air-conditioner indoor unit.

[0004] The present invention provides an electric heating system, which is applied to an indoor unit of an air conditioner. An evaporator is provided in the indoor unit of the air conditioner. The electric heating system comprises an electric heating component and a control component. The electric heating component is provided below the evaporator. The control component comprises:

[0005] Driving parts;

[0006] An action member connected to the driving member, wherein the driving member can drive the action member to move so as to drive the electric heating component to move up and down;

[0007] A control component is connected to the driving component and is used to control the start and stop of the driving component according to different working modes of the air conditioner indoor unit.

[0008] Optionally, the actuating member includes a cam mechanism, and the cam mechanism is disposed below the electric heating component and in contact with the electric heating component.

[0009] Optionally, the cam mechanism includes at least two cams, which are respectively arranged on two sides below the electric heating component.

[0010] Optionally, the cam mechanism includes a cam and a rotating shaft, the cam has a rotating center, one end of the rotating shaft is connected to the rotating center, and the other end is connected to a side of the indoor unit of the air conditioner.

[0011] Optionally, the cam mechanism further comprises a push rod, one end of which is connected to the electric heating component, and the other end of which is in contact with the cam and can move along the cam surface.

[0012] Optionally, a displacement sensor is also included, which is arranged close to the electric heating component and connected to the control component for detecting the current position of the electric heating component.

[0013] Optionally, an alarm is also included, which is connected to the control component and is used to send out an alarm signal when the displacement sensor detects that the electric heating component has not moved to a specified position.

[0014] The present invention also provides an indoor unit of an air conditioner, comprising the electric heating system as described in any one of the above items.

[0015] The present invention also provides an air conditioner, comprising an air conditioner outdoor unit and the air conditioner indoor unit as described above.

[0016] The present invention further provides a control method, which is applied to the indoor unit of the air conditioner as described above, and the control method comprises:

[0017] Obtaining the working mode of the indoor unit of the air conditioner;

[0018] If the working mode of the indoor unit of the air conditioner is the cooling mode, the control component controls the driving component to drive the action component to move, so as to move the electric heating component to the first position;

[0019] If the working mode of the air conditioner indoor unit is the heating mode, the control component controls the driving component to drive the action component to move, so as to move the electric heating component to the second position;

[0020] The first position is located above the second position, and the first position is closer to the top of the evaporator relative to the second position.

[0021] The present invention discloses an electric heating system, an air-conditioner indoor unit, a split-type air conditioner and a control method. The embodiments of the present invention realize the position adjustment of the electric heating component in different working modes of the air-conditioner indoor unit, solves the problem that the electric heating component in a fixed position blocks the airflow in the cooling mode, further improves the cooling effect of the air-conditioner indoor unit, reduces noise, enhances user experience, and also ensures the heating effect in the heating mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the structure of an evaporator and an electric heating system provided in an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the structure of an electric heating assembly and a cam mechanism provided in an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the structure of the electric heating assembly provided by an embodiment of the present invention when it moves;

[0026] Figure 4 A schematic diagram of the structure of an electric heating system provided by an embodiment of the present invention;

[0027] Figure 5 A schematic flow chart of a control method provided by an embodiment of the present invention.

[0028] Description of the symbols in the figure:

[0029] 100, electric heating system; 101, electric heating component; 102, control component; 1021, driving member; 1022, actuating member; 10221, cam mechanism; 102211, cam; 1022111, rotation center; 102212, rotation axis; 102213, push rod; 1023, control member; 1024, displacement sensor; 1025, alarm; 200, air conditioner indoor unit; 201, evaporator; 2011, side panel; 2012, angle bracket; 2013, glue mouth. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0032] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0033] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0034] See also Figure 1 The embodiment of the present invention provides an electric heating system 100, which is applied to an air conditioner indoor unit 200. An evaporator 201 is provided in the air conditioner indoor unit 200. The electric heating system 100 includes an electric heating component 101 and a control component 102. The electric heating component 101 is provided below the evaporator 201. The control component 102 includes: a driving member 1021; an action member 1022, which is connected to the driving member 1021, and the driving member 1021 can drive the action member 1022 to move, so as to drive the electric heating component 101 to move up and down; a control member 1023, which is connected to the driving member 1021 and is used to control the start and stop of the driving member 1021 according to different working modes of the air conditioner indoor unit 200.

[0035] In this embodiment, the electric heating component 101 is arranged below the evaporator 201, and the driving member 1021 can drive the action member 1022 to move to drive the electric heating component 101 to move up and down. The control member 1023 is used to control the start and stop of the driving member 1021 according to the different working modes of the air-conditioning indoor unit 200, thereby realizing the position adjustment of the electric heating component 101 in the different working modes of the air-conditioning indoor unit 200, solving the problem of the electric heating component 101 in a fixed position blocking the airflow in the cooling mode, further improving the cooling effect of the air-conditioning indoor unit 200, reducing noise, and improving user experience, while also ensuring the heating effect in the heating mode.

[0036] Specifically, the actuating member 1022 includes a cam mechanism 10221, which is disposed below the electric heating component 101 and in contact with the electric heating component 101. In the present embodiment, the cam mechanism 10221 is a mechanical transmission device, which utilizes the contour curve of the cam surface to drive the electric heating component 101 to perform reciprocating motion or motion along a specific trajectory. By using the cam mechanism 10221 as the actuating member 1022, the electric heating component 101 can be effectively driven to move up and down in the air conditioner indoor unit 200, so that the electric heating component 101 can be adjusted in position according to the working mode of the air conditioner, thereby avoiding the problem that the electric heating component 101 blocks the airflow in the cooling mode, forms a vortex, causes abnormal noise and poor cooling effect, and also ensures the heating effect in the heating mode.

[0037] Specifically, the output shaft of the driving member 1021 is connected to the input end of the cam mechanism 10221, driving the cam mechanism 10221 to rotate. Specifically, the control member 1023 receives a signal from the control system of the air conditioner indoor unit 200 to determine the current working mode of the air conditioner indoor unit 200. According to the working mode of the air conditioner indoor unit 200, the control member 1023 sends a corresponding control signal to the driving member 1021 to start or stop the movement of the driving member 1021. The control signal may also include time information or position information to control the electric heating component 101 to move a specified distance through the driving member 1021.

[0038] Furthermore, at least two cam mechanisms 10221 are provided, which are respectively arranged on both sides below the electric heating component 101. In this embodiment, the two cam mechanisms 10221 can be driven by the same driving member 1021 to ensure that the two cam mechanisms 10221 rotate at the same speed and direction, and ensure that the electric heating component 101 can be smoothly pushed to move along a predetermined path during rotation. Since the two cam mechanisms 10221 are respectively located on both sides of the electric heating component 101, they need to work together to ensure that the electric heating component 101 remains horizontal during movement. Load balance can be ensured by accurately designing the profile of the cam and adjusting the installation position of the driving member 1021. When moving the electric heating component 101, the two cam mechanisms 10221 need to bear the same load to avoid imbalance or deflection.

[0039] It should be noted that the two cam mechanisms 10221 can be driven respectively by two synchronously driven driving components 1021. When the working mode of the air conditioner indoor unit 200 changes, the control component 1023 needs to send control signals to the two driving components 1021 at the same time to ensure that they start or stop synchronously.

[0040] Further, such as Figure 1As shown, the cam mechanism 10221 includes a cam 102211 and a rotating shaft 102212, the cam 102211 has a rotating center 1022111, one end of the rotating shaft 102212 is connected to the rotating center 1022111, and the other end is connected to the side of the air conditioner indoor unit 200. That is, one cam mechanism 10221 includes one cam 102211 and a rotating shaft 102212 connected to the rotating center 1022111 of the cam 102211. When two cam mechanisms 10221 are provided, the rotating shafts 102212 of the two cam mechanisms may be integrally provided, i.e., jointly constitute one rotating shaft 102212, so as to be driven by one driving member 1021, or the rotating shafts 102212 of the two cam mechanisms may be separately provided, i.e., separately form two rotating shafts 102212, so as to be driven by two driving members 1021 respectively.

[0041] In this embodiment, the cam 102211 is a disk or cylinder with a specific profile, and its profile is designed to contact the electric heating component 101 when rotating, so as to drive the electric heating component 101 to perform reciprocating motion or motion along a specific trajectory. The cam 102211 has a fixed rotation center 1022111, which is the reference point for the rotation of the cam 102211. The rotating shaft 102212 is a rigid connecting member, one end of which is connected to the rotation center 1022111 of the cam 102211, and the other end is connected to the side of the air conditioner indoor unit 200 (or the side of the evaporator 201, such as the side plate 2011 or the angle frame 2012 of the evaporator 201). In this way, when the rotating shaft 102212 rotates under the drive of the driving member 1021, the cam 102211 will also rotate accordingly.

[0042] In a specific embodiment, when the working mode of the air conditioner indoor unit 200 changes and the electric heating component 101 needs to be moved, the control member 1023 sends a control signal to the driving member 1021. After receiving the signal, the driving member 1021 starts to work and drives the cam 102211 to rotate through the rotating shaft 102212. As the cam 102211 rotates, its profile contacts the electric heating component 101, so that the electric heating component 101 moves along a predetermined path until it reaches the desired position. In order to make the electric heating component 101 more stable during movement or use, a slide can be set on the side of the evaporator 201, and the two sides of the electric heating component 101 are extended into the slide, so that the electric heating component 101 can move up and down along the slide. For example, when the non-raised end of the cam 102211 rotates to contact the electric heating component 101, the electric heating component 101 is located at the initial position (the lowest position), and when the non-raised end of the cam 102211 rotates toward the raised end, the electric heating component 101 moves upward along the slide; when the raised end of the cam 102211 rotates to contact the electric heating component 101, the electric heating component 101 is located at the specified position (the highest position), and when the raised end of the cam 102211 rotates toward the non-raised end, the electric heating component 101 moves downward along the slide by its own gravity.

[0043] Further, such as Figure 2 As shown, the cam mechanism 10221 also includes a push rod 102213, one end of which is connected to the electric heating component 101, and the other end of the push rod 102213 is in contact with the cam 102211 and can move along the surface of the cam 102211. In this embodiment, the connection of the push rod 102213 allows the rotational motion of the cam 102211 to be converted into a linear drive for the electric heating component 101. When the cam 102211 rotates, the contour shape of its surface can push the push rod 102213, so that the push rod 102213 drives the electric heating component 101 to perform reciprocating motion or specific trajectory motion, thereby achieving precise control of the electric heating component 101.

[0044] It should be noted that the push rod 102213 needs to withstand the force and movement applied by the cam 102211, so a material with sufficient strength and wear resistance should be selected. The material of the push rod 102213 can be steel, alloy, etc. The diameter and length of the push rod 102213 should be determined according to the size, load requirements and movement trajectory of the cam 102211 to ensure that the push rod 102213 remains stable during movement while reducing wear.

[0045] In a specific embodiment, Figure 2 and Figure 3As shown, when the electric heating component 101 is at position one, the cam 102211 is at the initial position (the non-convex end of the cam 102211 is in contact with the electric heating component 101). When the cam 102211 rotates around the rotation center 1022111, the rotation angle of the cam 102211 is less than 90°, and the edge of the convex end of its contour curve gradually contacts the push rod 102213, pushing the push rod 102213 and the electric heating component 101 to move upward. In this way, the electric heating component 101 moves vertically from position one to position two, and then moves vertically from position two to position three. At this time, the top of the convex end of the cam 102211 contacts the push rod 102213. When the rotation angle exceeds 90°, the non-convex end of the contour curve begins to contact the push rod 102213, causing the push rod 102213 and the electric heating component 101 to move downward. When the rotation angle of the cam 102211 reaches 180° (i.e. half a circle), the electric heating component 101 returns to position one.

[0046] Specifically, the driving member 1021 may be a motor that can convert electrical energy into mechanical energy to drive the action member 1022 to rotate. The driving member 1021 may also be a pneumatic device that uses compressed air or gas as a working medium and drives the action member 1022 to rotate through changes in air pressure. The driving member 1021 may also be a hydraulic device that uses the pressure of a liquid to transfer energy and drive the action member 1022 to rotate.

[0047] In a specific embodiment, the driving member 1021 can also be a stepper motor. When the working mode of the air conditioner indoor unit 200 is set to the heating mode, the control mainboard controls the stepper motor to move the electric heating component 101 away from the top of the evaporator 201 (the position of the glue port 2013), thereby achieving the set heating effect; when the working mode of the air conditioner indoor unit 200 is set to the cooling mode, the control mainboard controls the stepper motor to move the electric heating component 101 toward the top of the evaporator 201 (the position of the glue port 2013), thereby achieving the set cooling effect, and the internal area of ​​the evaporator 201 will not generate eddy current due to the obstruction of the electric heating component 101, thereby avoiding abnormal noise, greatly improving the cooling efficiency of the evaporator 201, and improving product quality.

[0048] The stepper motor controls the cam mechanisms 10221 on both sides to perform multi-stage motion through electric wires, wherein the stepper motor can be a three-phase asynchronous motor, and the cam mechanism 10221 can be controlled by three operations to move the electric heating to the specified position of the evaporator 201. In the cam mechanism 10221, the cam 102211 rotates and moves around the center point of one side, thereby moving the vertical position of the push rod 102213, wherein the cam 102211 is connected to the push rod 102213, and the push rod 102213 supports the electric heating component 101 to move slowly, so the multi-stage motion method can prevent the electric heating component 101 and the evaporator 201 from colliding due to inertia, thereby damaging the parts.

[0049] When the driving component 1021 is a stepper motor, the stepper motor is mainly controlled by the control motherboard, and the three-phase, six-phase and eight-phase are controlled by writing relevant programs in C language, and then burning them into the control motherboard, so that the stepper motor can move in multiple levels. In the case of this embodiment, only three levels of movement are needed to meet the requirements, and there is no need to set more levels of movement. Therefore, a three-phase asynchronous motor is finally selected to achieve it.

[0050] The action member 1022 is used as an actuator, and its selection requirements mainly depend on the volume and mass of the object to be moved, that is, the volume and mass of the electric heating component 101. The electric heating component 101 of a general household split air conditioner is relatively long, so cam mechanisms 10221 can be placed on both sides of the electric heating to ensure the stability of the movement of the electric heating component 101. If the electric heating component 101 of some household air conditioners is longer or heavier, it is necessary to consider placing a certain number of cam mechanisms 10221 in the middle area of ​​the electric heating, or even increase the overall width of the cam 102211, so as to ensure the smoothness and reliability of the operation of the electric heating component 101, or replace the material and surface roughness of the cam 102211 to increase its tolerable mass.

[0051] It should be noted that the cam mechanism 10221 is relatively small in size, and thus its effect on air supply is negligible. The cam mechanism 10221 and the rotating shaft 102212 may be made of aluminum alloy.

[0052] In another embodiment, the action member 1022 is a guide rail assembly. The guide rail assembly includes a guide rail body, a slider and a rolling member. The guide rail body is long and vertically installed. The slider is installed on the guide rail body and contacts the surface of the guide rail body through a rolling member (such as a ball or a roller). The slider is connected to the electric heating component 101. The driving member 1021 transmits power to the slider. Under the action of the power, the slider rolls along the surface of the guide rail body, driving the electric heating component 101 to move together.

[0053] In another embodiment, the action member 1022 is an electric telescopic rod. The electric telescopic rod includes an inner rod and an outer rod, one end of the inner rod is connected to the driving member 1021, the other end of the inner rod is in contact with the electric heating component 101, one end of the outer rod is fixedly connected to the electric heating component 101 through a connecting member (such as a connecting rod, etc.), and the other end is in contact with one end of the inner rod. Under the driving action of the driving member 1021, the outer rod of the electric telescopic rod performs telescopic movement, that is, the outer rod is telescoped relative to the inner rod, and the connecting member drives the electric heating component 101 to move together.

[0054] In another embodiment, the action member 1022 is a transmission mechanism. The transmission mechanism is connected to the electric heating component 101 through a bracket, and the transmission mechanism is used to transmit the power of the driving member 1021 to the bracket. The transmission mechanism includes a belt drive, a chain drive, a gear drive, a screw drive, etc. When the transmission mechanism is controlled to start and stop according to different working modes of the air conditioner indoor unit 200, the bracket starts to move under the action of the power, and the movement of the bracket drives the electric heating component 101 to move together.

[0055] Further, such as Figure 4 As shown, the electric heating system 100 also includes a displacement sensor 1024, which is arranged near the electric heating component 101 and connected to the control component 1023, and is used to detect the current position of the electric heating component 101. In this embodiment, the displacement sensor 1024 can accurately detect the current position of the electric heating component 101. Specifically, the displacement sensor 1024 feeds back the detected position information to the control component 1023 (such as a microprocessor or a controller). The control component 1023 adjusts the movement of the action member 1022 according to this information, so as to ensure that the electric heating component 101 can move according to the predetermined trajectory and speed. If the electric heating component 101 fails to reach the expected position, the displacement sensor 1024 can detect this deviation and send a signal to the control component 1023. The control component 1023 can take appropriate measures accordingly, such as stopping heating and issuing an alarm to prevent potential failures or safety accidents.

[0056] Furthermore, the electric heating system 100 further includes an alarm 1025, which is connected to the control member 1023, and is used to send out an alarm signal when the displacement sensor 1024 detects that the electric heating component 101 has not moved to the specified position. In this embodiment, when the displacement sensor 1024 detects that the electric heating component 101 has failed to reach the expected position, the alarm 1025 will immediately send out a sound, light signal or other form of alarm to attract the attention of the operator. By cooperating with the displacement sensor 1024, the alarm 1025 can detect a fault in the electric heating system 100. For example, if the electric heating component 101 fails to move to the specified position due to a mechanical failure, a power problem or a control error, the alarm 1025 will promptly send out an alarm, which helps to improve the overall reliability of the electric heating system 100.

[0057] The present invention further provides an air conditioner indoor unit 200, comprising the electric heating system 100 as described in any one of the above items.

[0058] The present invention further provides an air conditioner, comprising an air conditioner outdoor unit and the air conditioner indoor unit 200 as described above.

[0059] See also Figure 5 , Figure 5 A flow chart of a control method provided by an embodiment of the present invention, the method comprises steps S101 to S103:

[0060] S101, obtaining the working mode of the indoor unit of the air conditioner;

[0061] S102, if the working mode of the indoor unit of the air conditioner is the cooling mode, controlling the driving member through the control member to drive the action member to move, so as to move the electric heating component to the first position;

[0062] S103, if the working mode of the indoor unit of the air conditioner is the heating mode, the control component controls the driving component to drive the action component to move, so as to move the electric heating component to the second position;

[0063] The first position is located above the second position, and the first position is closer to the top of the evaporator relative to the second position.

[0064] In this embodiment, in cooling mode, since the main task of the air conditioner indoor unit is to reduce the indoor temperature, the electric heating component (if enabled) will interfere with this process, and at this time it is moved to the first position (i.e., Figure 3 The electric heating component should be placed in the second position (as shown in the figure) to maximize its heating effect. Figure 3 Position 1) as shown, where the electric heating assembly can heat the passing air more evenly, or closer to the air outlet to more efficiently transfer heat to the room.

[0065] In the specific working process, the working mode of the air conditioner indoor unit is first determined, and the position of the electric heating component is detected by the displacement sensor. If the air conditioner indoor unit is in the cooling mode, if the electric heating component is not in the first position, the control component controls the driving component to drive the action component to move, so as to move the electric heating component to the first position. If the electric heating component is already in the first position, there is no need to control the action component to move. If the air conditioner indoor unit is in the heating mode, if the electric heating component is not in the second position, the control component controls the driving component to drive the action component to move, so as to move the electric heating component to the second position. If the electric heating component is already in the second position, there is no need to control the action component to move.

[0066] During the operation of the air conditioner indoor unit, if the electric heating component is not in the correct position due to a fault or other reasons, the alarm will sound an alarm. At this time, the air conditioner can be stopped, or the control component can be used to control the driving component to drive the action component to move so as to move the electric heating component to the correct position. Regardless of the working mode of the air conditioner indoor unit (cooling mode or heating mode), the air conditioner indoor unit improves the cooling efficiency of the evaporator in the cooling mode by moving the position of the electric heating component, which greatly improves the cooling performance of the air conditioner, avoids abnormal noise caused by eddy currents, improves the quality of air conditioner products, and ensures the heating effect of the evaporator in the heating mode.

[0067] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0068] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive.

[0069] Inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "including a..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. An electric heating system, applied to an indoor unit of an air conditioner, wherein an evaporator is provided in the indoor unit of the air conditioner, characterized in that: The electric heating system comprises an electric heating component and a control component, wherein the electric heating component is arranged below the evaporator, and the control component comprises: Driving parts; An action member connected to the driving member, wherein the driving member can drive the action member to move so as to drive the electric heating component to move up and down; A control component is connected to the driving component and is used to control the start and stop of the driving component according to different working modes of the air conditioner indoor unit.

2. The electric heating system according to claim 1, characterized in that: The action member comprises a cam mechanism, and the cam mechanism is arranged below the electric heating component and contacts the electric heating component.

3. The electric heating system according to claim 2, characterized in that: There are at least two cam mechanisms, which are respectively arranged on two sides below the electric heating component.

4. The electric heating system according to claim 2, characterized in that: The cam mechanism comprises a cam and a rotating shaft, wherein the cam has a rotating center, one end of the rotating shaft is connected to the rotating center, and the other end is connected to the side of the indoor unit of the air conditioner.

5. The electric heating system according to claim 4, characterized in that: The cam mechanism also includes a push rod, one end of which is connected to the electric heating component, and the other end of which is in contact with the cam and can move along the surface of the cam.

6. The electric heating system according to claim 1, characterized in that: It also includes a displacement sensor, which is arranged close to the electric heating component and connected to the control component for detecting the current position of the electric heating component.

7. The electric heating system according to claim 6, characterized in that: It also includes an alarm, which is connected to the control component and is used to send out an alarm signal when the displacement sensor detects that the electric heating component has not moved to the specified position.

8. An air conditioner indoor unit, characterized in that: Comprising the electric heating system as described in any one of claims 1-7.

9. A split air conditioner, characterized in that: It comprises an air conditioner outdoor unit and an air conditioner indoor unit as claimed in claim 8.

10. A control method, applied to the air conditioner indoor unit according to claim 8, characterized in that: The control method comprises: Obtaining the working mode of the indoor unit of the air conditioner; If the working mode of the indoor unit of the air conditioner is the cooling mode, the control component controls the driving component to drive the action component to move, so as to move the electric heating component to the first position; If the working mode of the air conditioner indoor unit is the heating mode, the control component controls the driving component to drive the action component to move, so as to move the electric heating component to the second position; The first position is located above the second position, and the first position is closer to the top of the evaporator relative to the second position.

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