WO2021036405A1 - Indoor unit, air conditioner, and air conditioner control method - Google Patents

Abstract

An indoor unit, an air conditioner, and an air conditioner control method. The indoor unit comprises a housing (10), the housing being provided with an accommodating cavity, and a ventilation channel being provided in the accommodating cavity. Volute switching parts are movably arranged in the accommodating cavity such that the volute switching parts are provided with a first position and a second position. When a volute switching part is positioned at the first position, the volute switching part cooperates with the ventilation channel so as to form an air intake channel, and when a volute switching part is positioned at the second position, the volute switching part cooperates with the ventilation channel so as to form an air output channel. By means of providing volute switching parts, the size of the intake area of a ventilation channel of an indoor unit is changed, thereby selecting whether the corresponding ventilation channel is an air output channel or an air inlet channel on the basis of a working mode of the indoor unit. Meanwhile, configuration of a volute switching part in an air outlet channel mode is able to have an extending effect on the length of the air outlet channel, causing the air speed at an air outlet to be higher, and such arrangement is able to effectively increase the air intake and air output of the indoor unit, effectively improving usage experience for a user.

Description

Indoor unit, air conditioner and air conditioner control method Technical field

This application relates to the technical field of air-conditioning equipment, and in particular, to an indoor unit, an air conditioner, and a method for controlling the air conditioner. This application claims the priority of the patent application filed to the State Intellectual Property Office of China on August 26, 2019, with the application number 201910791909.6 and the invention title of "Indoor Unit, Air Conditioner and Air Conditioner Control Method".

Background technique

The existing wall-mounted air conditioner internal unit often has only one air outlet, and the air supply range and performance are limited. Moreover, the air intake of the air inlet is limited, which cannot meet people's diverse life needs. The air conditioner with upper and lower air outlets not only has a wide range of air outlets, but also can open the upper air outlet or lower air outlet according to user needs. The air supply mode is diverse, but it is limited by the air inlet area. , The performance of upper and lower outlet air conditioners is difficult to be greatly improved.

Summary of the invention

The main purpose of this application is to provide an indoor unit, an air conditioner, and a method for controlling the air conditioner, so as to solve the problem of small air intake of the air conditioner in the prior art.

In order to achieve the above objective, according to one aspect of the present application, an indoor unit is provided, which includes: a housing, the housing has an accommodation cavity, and the accommodation cavity is provided with a ventilation channel; a volute switching part, the volute switching part is movably arranged In the accommodating cavity, so that the volute switching part has a first position and a second position. When the volute switching part is in the first position, the volute switching part cooperates with the ventilation channel to form an air inlet channel, and the volute switching part is located at the first position. In the second position, the volute switching part cooperates with the ventilation channel to form an air outlet channel.

Further, the cross-sectional area of the air inlet of the air inlet channel is larger than the cross-sectional area of the air outlet of the air outlet channel.

Further, the ventilation channel includes an upper ventilation channel and a lower ventilation channel, the volute switching part includes an upper volute switching part, and the indoor unit includes: a heat exchanger, which is arranged in the housing to divide the containing cavity into an upper cavity And the lower cavity, the upper ventilation channel communicates with the upper cavity, the lower ventilation channel communicates with the lower cavity, the upper volute switching part is arranged at the opening of the upper ventilation channel, the upper volute switching part has a first position and a first position Two positions.

Further, the volute switching part further includes a lower volute switching part, the lower volute switching part is arranged at the opening of the lower ventilation channel, and the lower volute switching part has a first position and a second position.

Further, when the upper volute switching part is at the first position, the lower volute switching part is at the second position, and when the upper volute switching part is at the second position, the lower volute switching part is at the first position.

Further, the upper volute switching part includes: a first rotating volute, the first rotating volute is movably connected with the side wall of the upper ventilation channel; a first driving part, the first driving part is connected with the first rotating volute , The first driving part can drive the first rotating volute to be located at the first position or the second position.

Further, the first rotating volute has a first air passage surface. When the first rotating volute is located at the first position, the first air passage surface and the side wall of the upper ventilation passage enclose an air inlet passage. When the volute is located in the second position, the first air duct surface and the side wall of the upper ventilation channel are enclosed to form an air outlet channel.

Further, the connection between the first air duct surface and the side wall of the upper ventilation channel is a curved transitional setting.

Further, the lower volute switching part includes: a second rotary volute, which is movably connected to the side wall of the lower ventilation channel; a second driving part, which is connected to the second rotary volute , The second driving part can drive the second rotating volute to be located at the first position or the second position.

Further, the second rotating volute has a second air passage surface, and when the second rotating volute is located at the first position, the second air passage surface and the side wall of the lower ventilation passage surround the air inlet passage. When the volute is located at the second position, the second air duct surface and the side wall of the lower ventilation channel are enclosed to form an air outlet channel.

Further, the connection between the second air duct surface and the side wall of the lower ventilation channel is a curved transitional setting.

Further, the indoor unit further includes: a first volute tongue, the first volute tongue is arranged in the upper cavity, and the first volute tongue is arranged opposite to the first rotating volute.

Further, the first volute tongue is rotatably arranged with respect to the housing, so that the first volute tongue has a first closed position and a first open position. When the first volute tongue is located in the first closed position, the first volute tongue will be upward. The opening of the ventilation passage is closed, and when the first volute tongue is located at the first open position, the first volute tongue, at least one of the upper ventilation passage and the first rotating volute are enclosed to form an air inlet passage or an air outlet passage.

Further, the indoor unit further includes: a second volute tongue, the second volute tongue is arranged in the lower cavity, and the second volute tongue is arranged opposite to the second rotating volute.

Further, the second volute tongue is rotatably arranged relative to the housing, so that the second volute tongue has a second closed position and a second open position. When the second volute tongue is located in the second closed position, the second volute tongue will be lowered. The opening of the ventilation passage is closed, and when the second volute tongue is located in the second open position, the second volute tongue, at least one of the lower ventilation passage and the second rotating volute are enclosed to form an air inlet passage or an air outlet passage.

Further, the indoor unit further includes: a first fan part, the first fan part is arranged in the upper cavity; a second fan part, the second fan part is arranged in the lower cavity; wherein, the first fan part and the second fan part are At least one is a cross-flow fan, and the axis of the cross-flow fan is arranged in a horizontal direction.

According to another aspect of the present application, there is provided an air conditioner, including an indoor unit, the indoor unit being the aforementioned indoor unit.

According to another aspect of the present application, there is provided a method for controlling an air conditioner. The method is used to control the above-mentioned air conditioner. The method includes the following steps: the air conditioner includes a cooling mode and a heating mode. When the air conditioner is in the cooling mode, the upper ventilation channel realizes the air outlet, and the lower ventilation channel realizes the air inlet. When the air conditioner is in the heating mode, the upper ventilation channel realizes the air inlet and the lower ventilation channel realizes the air outlet.

Further, the method further includes the following steps: the controller can control the working state of the first fan part and the second fan part according to the indoor temperature; when the air conditioner is in the cooling mode, when the indoor temperature is within the first preset value, the controller controls The first fan unit and the second fan unit operate at the same time. When the indoor temperature is lower than the first preset value, the controller controls one of the first fan unit and the second fan unit to stop operation; when the air conditioner is in heating mode, When the indoor temperature is within the second preset value, the controller controls the first fan section and the second fan section to operate at the same time. When the indoor temperature is higher than the first preset value, the controller controls the first fan section and the second fan section One of them stopped the job.

Further, when the controller controls the air conditioner to be in the cooling mode, the upper volute switching part is at the second position and the lower volute switching part is at the first position; the controller controls the first fan part to perform blowing operations, and the controller controls the second The fan unit stops blowing operation.

Further, the air conditioner also includes a heating mode. When the controller controls the air conditioner to be in the heating mode, the upper volute switching part is at the first position, the lower volute switching part is at the second position, and the controller controls the first fan part to stop For blowing operation, the controller controls the second fan unit to perform blowing operation.

Further, when the air conditioner is in a cooling mode, the air conditioner is in an oblique upward air outlet mode, and when the air conditioner is in a heating mode, the air conditioner is in an oblique downward air outlet.

Applying the technical solution of the present application, the size of the air inlet area of the ventilation channel of the indoor unit is changed by setting the volute switching part, thereby selecting whether the corresponding ventilation channel is the air outlet channel or the air inlet channel according to the working mode of the indoor unit. This setting can effectively increase the air intake and air output of the indoor unit, and effectively improve the user experience.

Description of the drawings

The drawings of the specification forming a part of the application are used to provide a further understanding of the application, and the exemplary embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation of the application. In the attached picture:

Fig. 1 shows a schematic structural diagram of a first embodiment of an indoor unit according to the present application;

Fig. 2 shows a schematic structural diagram of a second embodiment of an indoor unit according to the present application;

Fig. 3 shows a schematic structural diagram of a third embodiment of an indoor unit according to the present application;

Fig. 4 shows a schematic structural diagram of a fourth embodiment of an indoor unit according to the present application;

Fig. 5 shows a schematic structural diagram of a fifth embodiment of an indoor unit according to the present application.

Among them, the above drawings include the following reference signs:

10. Shell; 11. Upper ventilation channel; 12. Lower ventilation channel;

20. Heat exchanger;

31. Upper volute switching part; 311, first rotating volute; 312, first air duct surface;

32. Lower volute switching part; 321, second rotating volute; 322, second air duct surface;

40. Upper cavity;

50. Lower cavity;

60. The first tongue;

70. The second tongue;

80. The first fan section; 90. The second fan section.

detailed description

It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present application will be described in detail with reference to the drawings and in conjunction with the embodiments.

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

It should be noted that the terms "first" and "second" in the specification and claims of the application and the above-mentioned drawings are used to distinguish similar objects, and not necessarily used to describe a specific sequence or sequence. It should be understood that the terms used in this way are interchangeable under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those clearly listed. Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms, and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concept of these exemplary embodiments to those of ordinary skill in the art. In the drawings, for clarity, it may be enlarged. The thicknesses of the layers and regions are shown, and the same reference numerals are used to denote the same devices, so their description will be omitted.

As shown in FIG. 1 to FIG. 3, according to a specific embodiment of the present application, an indoor unit is provided.

Specifically, as shown in FIG. 1, the indoor unit includes a casing 10 and a volute switching part. The housing 10 has an accommodation cavity, and the accommodation cavity is provided with a ventilation channel. The volute switching part is movably arranged in the accommodating cavity so that the volute switching part has a first position and a second position. When the volute switching part is at the first position or the second position, the volute switching part and the ventilation channel Cooperate to form an air inlet channel or an air outlet channel.

In this embodiment, the size of the air inlet area of the ventilation channel of the indoor unit is changed by setting the volute switch part, thereby selecting whether the corresponding ventilation channel is the air outlet channel or the air inlet channel according to the working mode of the indoor unit. At the same time, by setting the volute switch part as an air outlet channel, it can extend the length of the air outlet channel, making the wind speed at the air outlet higher, and this setting can effectively increase the air inlet and outlet of the indoor unit. , Effectively improve the user experience.

Wherein, when the volute switching part is at the first position, the volute switching part cooperates with the ventilation channel to form an air inlet channel, and when the volute switching part is at the second position, the volute switching part cooperates with the ventilation channel to form an air outlet channel. The cross-sectional area of the air inlet of the air inlet channel is larger than the cross-sectional area of the air outlet of the air outlet channel. By selecting a ventilation channel with a large cross-sectional area as the air inlet channel, the air intake of the indoor unit can be effectively increased, and then the air output of the indoor unit can be effectively increased, and the heat exchange performance of the indoor unit can be improved.

As shown in FIG. 1, the ventilation channel includes an upper ventilation channel 11 and a lower ventilation channel 12. The volute switching part includes an upper volute switching part 31, and the indoor unit includes a heat exchanger 20. The heat exchanger 20 is disposed in the housing 10 to divide the containing cavity into an upper cavity 40 and a lower cavity 50. The upper ventilation channel 11 communicates with the upper cavity 40, the lower ventilation channel 12 communicates with the lower cavity 50, the upper volute switching portion 31 is provided at the opening of the upper ventilation channel 11, and the upper volute switching portion 31 has a first position And the second position. This arrangement can make the structure of the indoor unit simple and easy to process.

Specifically, the volute switching part further includes a lower volute switching part 32, which is disposed at the opening of the lower ventilation passage 12, and the lower volute switching part 32 has a first position and a second position. This arrangement can effectively increase the air intake volume of the lower ventilation channel 12.

Wherein, when the upper volute switching portion 31 is located at the first position, the lower volute switching portion 32 is located at the second position. When the upper volute switching portion 31 is located at the second position, the lower volute switching portion 32 is located at the first position. That is, in this embodiment, the airflow outside the shell can be introduced from the lower ventilation channel 12, or the airflow outside the shell can be introduced into the shell from the upper ventilation channel 11 to exchange heat with the heat exchanger, which effectively improves the indoor The practicality of the machine.

Further, the upper volute switching part 31 includes a first rotating volute 311 and a first driving part. The first rotating volute 311 is movably connected with the side wall of the upper ventilation channel 11. The first driving part is connected with the first rotating volute 311, and the first driving part can drive the first rotating volute 311 to be located at the first position or the second position. As shown by D1 in FIG. 1, D1 is the rotation center of the first rotating volute 311, and the first driving part may be a stepping motor, and the stepping motor drives the first rotating volute 311 to rotate around the rotation center.

In order to reduce the wind resistance of the air inlet and outlet, the first rotating volute 311 is provided with a first air duct surface 312. When the first rotating volute 311 is at the first position, the first air duct surface 312 and the side wall of the upper ventilation passage 11 form an air inlet channel. When the first rotating volute 311 is at the second position, the first wind The road surface 312 and the side wall of the upper ventilation channel 11 are enclosed to form an air outlet channel. The connection between the first air duct surface 312 and the side wall of the upper ventilation channel 11 is a curved transitional setting.

In this embodiment, the lower volute switching part 32 includes a second rotating volute 321 and a second driving part. The second rotating volute 321 is movably connected with the side wall of the lower ventilation channel 12. The second driving part is connected with the second rotating volute 321, and the second driving part can drive the second rotating volute 321 to be located at the first position or the second position. This arrangement makes the structure of the lower volute switching portion 32 simple and easy to process. Among them, the structure of the lower volute switching portion 32 can be arranged in the same manner as the structure of the upper volute switching portion 31, which can reduce the processing cost of the indoor unit. As shown in D2 in Figure 1, D2 is the rotation center of the second rotating volute 321. The second driving part can be a stepping motor. The stepping motor drives the second rotating volute 321 to rotate around the center of rotation. The C side is the indoor The installation side of the machine.

In order to further reduce the wind resistance of the inlet and outlet of the indoor unit, the second rotating volute 321 has a second air duct surface 322. When the second rotating volute 321 is at the first position, the second air duct surface 322 and the side wall of the lower ventilation channel 12 form an air inlet channel. When the second rotating volute 321 is at the second position, the second wind The road surface 322 and the side wall of the lower ventilation channel 12 are enclosed to form an air outlet channel. The connection between the second air passage surface 322 and the side wall of the lower ventilation channel 12 is a curved transitional setting.

In this embodiment, the indoor unit further includes a first volute tongue 60 and a second volute tongue 70. The first volute tongue 60 is disposed in the upper cavity 40, and the first volute tongue 60 is disposed opposite to the first rotating volute 311. The second volute tongue 70 is disposed in the lower cavity 50, and the second volute tongue 70 is disposed opposite to the second rotating volute 321. This arrangement can increase the air blowing distance of the indoor unit.

According to another embodiment of the present application, as shown in FIG. 4, the first volute tongue 60 is rotatably disposed relative to the housing 10, so that the first volute tongue 60 has a first closed position and a first open position. When the first volute tongue 60 is in the first closed position, the first volute tongue 60 closes the opening of the upper ventilation passage 11. When the first volute tongue 60 is in the first open position, the first volute tongue 60 and at least one of the upper ventilation passage 11 and the first rotating volute 311 are enclosed to form an air inlet channel or an air outlet channel. This arrangement can prevent external dust or foreign objects from entering the indoor unit and affecting the life of the indoor unit.

Further, as shown in FIG. 5, the second volute tongue 70 may also be arranged to be rotatably arranged relative to the housing 10 so that the second volute tongue 70 has a second closed position and a second open position. When the second volute tongue 70 is in the second closed position, the second volute tongue 70 closes the opening of the lower ventilation passage 12. When the second volute tongue 70 is in the second open position, the second volute tongue 70 and at least one of the lower ventilation channel 12 and the second rotating volute 321 are enclosed to form an air inlet channel or an air outlet channel. This arrangement can effectively prevent foreign objects from entering the indoor unit and improve the service life of the indoor unit.

The indoor unit also includes a first fan part 80 and a second fan part 90. The first fan part 80 is disposed in the upper cavity 40. The second fan part 90 is disposed in the lower cavity 50. Among them, at least one of the first fan part 80 and the second fan part 90 is a cross-flow fan, and the axis of the cross-flow fan is arranged in a horizontal direction. As shown in FIGS. 1 to 3, the first fan part 80 and the second fan part 90 are both cross-flow fans. This arrangement can effectively improve the air output and heat exchange performance of the indoor unit.

The indoor unit in the above embodiment can also be used in the technical field of air conditioning equipment, that is, according to another aspect of the present application, an air conditioner is provided. The air conditioner includes an indoor unit, and the indoor unit is the indoor unit in the above-mentioned embodiment.

Specifically, the air conditioner has an air supply mode of air supply from the upper air outlet and air from the lower air outlet. At the same time, the volute at the air inlet is rotated to increase the air inlet area, increase the air inlet volume of the air conditioner, and improve the performance of the air conditioner. The indoor unit adopting this structure can select upper air outlet or lower air outlet according to needs, and at the same time, rotate the volute at the air inlet according to the upper air outlet or the lower air outlet mode to increase the air inlet area.

By rotating the volute at the air inlet (the first rotating volute and the second rotating volute) to change the position of the volute, the air inlet area can be increased, and the large air volume can be achieved, which helps to improve the air conditioning performance. The upper and lower air outlets can choose different air outlets according to cooling and heating, which is beneficial to improve the uniformity of the room temperature distribution and enhance the comfort of the room.

As shown in Figure 1. The first rotating volute can rotate around the center of rotation of the volute, and the second rotating volute can rotate around the center of rotation of the volute. Two cross-flow fan blades are respectively arranged on the upper and lower sides of the heat exchanger of the air conditioner, and the two volute tongues are respectively arranged at the air outlet area of the corresponding cross-flow fan blades. The air conditioner has an upper air outlet and a lower air outlet. When the wind is out, the second volute rotates counterclockwise around the center of rotation of the volute, and the airflow enters from the lower air outlet, and blows out from the upper air outlet after heat exchange through the evaporator. When the wind needs to be discharged from the lower air outlet, the first volute rotates clockwise around the rotation center of the volute, and the airflow enters from the upper air outlet, and blows out from the lower air outlet after heat exchange through the evaporator. As shown in Figure 1, point A is the upper air vent, and point B is the lower air vent.

When the air conditioner is in the off state, as shown in Figure 1, the two rotating volutes do not rotate in the position shown. When the air conditioner is refrigerated, as shown in Figure 2, the upper cross-flow fan blades operate, and the lower cross-flow fan blades do not operate. The second volute rotates counterclockwise around the center of rotation of the volute to the position shown in the figure. The first volute does not rotate, and the air inlet area of the down vent increases. The airflow enters from the down vent, passes through the evaporator and blows out from the up vent . The first volute tongue also functions to extend the air duct, and the wind speed from the upper air outlet is higher, and the airflow can blow out a longer distance. Compared with general air conditioners, this air conditioner has a larger air intake, a higher position of the upper air outlet, better performance of the air conditioner, better shower-style air supply effect, better cooling effect of the air conditioner, and more uniform temperature drop.

When the air conditioner is heating, as shown in Figure 3. The lower cross flow fan blades operate, and the upper cross flow fan blades do not operate. The first volute rotates clockwise around the center of rotation of the volute to the position shown in the figure, the second volute does not rotate, the air inlet area of the upper air inlet increases, and the airflow enters from the upper air outlet, passes through the evaporator and blows out from the lower air outlet , The second volute tongue also plays the role of extending the air duct, the wind speed of the lower air outlet is higher, and the air flow can blow out a longer distance. Compared with general air conditioners, the air conditioner has a larger air intake, lower air outlet position, better performance of the air conditioner, better carpet air supply effect, better heating effect of the air conditioner, and more uniform temperature rise.

According to another aspect of the present application, there is provided a method for controlling an air conditioner. The method is used to control the above-mentioned air conditioner. The method includes the following steps: the air conditioner includes a cooling mode and a heating mode. When the air conditioner is in the cooling mode, the upper ventilation channel 11 realizes air outlet, and the lower ventilation channel 12 realizes air inlet. When the air conditioner is in the heating mode, the upper ventilation channel 11 realizes air inlet and the lower ventilation channel 12 realizes air outlet. The controller can control the working state of the first fan part 80 and the second fan part 90 according to the indoor temperature. When the air conditioner is in the cooling mode, when the indoor temperature is within the first preset value, the controller controls the first fan part 80 and the second fan part 90 to operate at the same time. When the indoor temperature is lower than the first preset value, the controller controls One of the first fan unit 80 and the second fan unit 90 stops working; when the air conditioner is in heating mode, when the indoor temperature is within the second preset value, the controller controls the first fan unit 80 and the second fan unit 90 At the same time, when the indoor temperature is higher than the first preset value, the controller controls one of the first fan part 80 and the second fan part 90 to stop the operation. Wherein, the controller can control the forward rotation and reverse rotation of the first fan part 80 and the second fan part 90.

When the controller controls the air conditioner to be in the cooling mode, the upper volute switching part 31 is at the second position, and the lower volute switching part 32 is at the first position; the controller controls the first fan part 80 to perform blowing operations, and the controller controls the second The blower unit 90 stops the blowing operation. The air conditioner also includes a heating mode. When the controller controls the air conditioner to be in the heating mode, the upper volute switching part 31 is at the first position, the lower volute switching part 32 is at the second position, and the controller controls the first fan part 80 to stop. For the blowing operation, the controller controls the second fan unit 90 to perform the blowing operation. Among them, when the air conditioner is in the cooling mode, the air conditioner is in the oblique upward air outlet mode, and when the air conditioner is in the heating mode, the air conditioner is in the oblique downward air outlet.

For ease of description, spatially relative terms can be used here, such as "above", "above", "above the surface", "above", etc., to describe as shown in the figure Shows the spatial positional relationship between one device or feature and other devices or features. It should be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device described in the figure. For example, if the device in the drawing is turned upside down, then a device described as "above other devices or structures" or "above other devices or structures" will then be positioned as "below the other devices or structures" or "on Under other devices or structures". Thus, the exemplary term "above" can include both orientations "above" and "below". The device can also be positioned in other different ways (rotated by 90 degrees or in other orientations), and the relative description of the space used here will be explained accordingly.

In addition to the above, it should be noted that the "one embodiment", "another embodiment", "embodiment", etc. referred to in this specification refer to specific features, structures, or features described in conjunction with the embodiment. The features are included in at least one embodiment described generally in this application. The occurrence of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when describing a specific feature, structure, or characteristic in combination with any embodiment, it is claimed that the combination of other embodiments to realize such a feature, structure, or characteristic also falls within the scope of the present application.

In the above-mentioned embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in an embodiment, reference may be made to related descriptions of other embodiments.

The above descriptions are only preferred embodiments of the application, and are not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims (22)

An indoor unit, characterized in that it comprises: A housing (10), the housing (10) has a accommodating cavity, and the accommodating cavity is provided with a ventilation channel; The volute switching part is movably arranged in the accommodating cavity so that the volute switching part has a first position and a second position, and the volute switching part is located in the first position. Position, the volute switching part cooperates with the ventilation channel to form an air inlet channel, and when the volute switching part is in the second position, the volute switching part cooperates with the ventilation channel to form an air inlet channel. Wind channel. The indoor unit according to claim 1, wherein the cross-sectional area of the air inlet of the air inlet channel is larger than the cross-sectional area of the air outlet of the air outlet channel. The indoor unit according to claim 1 or 2, characterized in that the ventilation passage comprises an upper ventilation passage (11) and a lower ventilation passage (12), and the volute switching part comprises an upper volute switching part (31) , The indoor unit includes: A heat exchanger (20), the heat exchanger (20) is arranged in the housing (10) to divide the containing cavity into an upper cavity (40) and a lower cavity (50), the The upper ventilation channel (11) is in communication with the upper cavity (40), the lower ventilation channel (12) is in communication with the lower cavity (50), and the upper volute switching portion (31) is arranged at At the opening of the upper ventilation passage (11), the upper volute switching portion (31) has the first position and the second position. The indoor unit according to claim 3, wherein the volute switching unit further comprises: A lower volute switching portion (32), the lower volute switching portion (32) is arranged at the opening of the lower ventilation passage (12), the lower volute switching portion (32) has the first position and The second position. The indoor unit according to claim 4, wherein when the upper volute switching portion (31) is located at the first position, the lower volute switching portion (32) is located at the second position, When the upper volute switching portion (31) is located at the second position, the lower volute switching portion (32) is located at the first position. The indoor unit according to claim 3, wherein the upper volute switching unit (31) comprises: A first rotating volute (311), the first rotating volute (311) is movably connected with the side wall of the upper ventilation channel (11); The first driving part is connected to the first rotating volute (311), and the first driving part can drive the first rotating volute (311) to be located at the first position or The second position. The indoor unit according to claim 6, wherein the first rotating volute (311) has a first air duct surface (312), and when the first rotating volute (311) is located in the first Position, the first air duct surface (312) and the side wall of the upper ventilation channel (11) enclose the air inlet channel, and when the first rotating volute (311) is located in the second When in position, the first air duct surface (312) and the side wall of the upper ventilation channel (11) surround the air outlet channel. The indoor unit according to claim 7, characterized in that the connection between the first air duct surface (312) and the side wall of the upper ventilation channel (11) is a curved transition. The indoor unit according to claim 4, wherein the lower volute switching unit (32) comprises: A second rotating volute (321), the second rotating volute (321) is movably connected with the side wall of the lower ventilation channel (12); The second driving part, the second driving part is connected with the second rotating volute (321), and the second driving part can drive the second rotating volute (321) to be located at the first position or The second position. The indoor unit according to claim 9, wherein the second rotating volute (321) has a second air duct surface (322), and when the second rotating volute (321) is located at the first Position, the second air duct surface (322) and the side wall of the lower ventilation channel (12) surround the air inlet channel, and when the second rotating volute (321) is located in the second In position, the second air channel surface (322) and the side wall of the lower ventilation channel (12) surround the air outlet channel. The indoor unit according to claim 10, characterized in that the connection between the second air duct surface (322) and the side wall of the lower ventilation channel (12) is a curved transition. The indoor unit according to claim 6, wherein the indoor unit further comprises: The first volute tongue (60), the first volute tongue (60) is arranged in the upper cavity (40), and the first volute tongue (60) is opposite to the first rotating volute (311)地 Settings. The indoor unit according to claim 12, wherein the first volute tongue (60) is rotatably arranged relative to the housing (10), so that the first volute tongue (60) has a first The closed position and the first open position, when the first volute tongue (60) is in the first closed position, the first volute tongue (60) closes the opening of the upper ventilation channel (11), when When the first volute tongue (60) is in the first open position, the first volute tongue (60) and at least one of the upper ventilation channel (11) and the first rotating volute (311) One is enclosed as the air inlet channel or the air outlet channel. The indoor unit of claim 9, wherein the indoor unit further comprises: The second volute tongue (70), the second volute tongue (70) is arranged in the lower cavity (50), and the second volute tongue (70) is opposite to the second rotating volute (321)地 Settings. The indoor unit according to claim 14, wherein the second volute tongue (70) is rotatably arranged relative to the housing (10), so that the second volute tongue (70) has a second The closed position and the second open position. When the second volute tongue (70) is in the second closed position, the second volute tongue (70) closes the opening of the lower ventilation channel (12), when When the second volute tongue (70) is in the second open position, the second volute tongue (70) is in contact with at least one of the lower ventilation channel (12) and the second rotating volute (321) One is enclosed as the air inlet channel or the air outlet channel. The indoor unit of claim 3, wherein the indoor unit further comprises: A first fan part (80), the first fan part (80) is arranged in the upper cavity (40); A second fan part (90), the second fan part (90) is arranged in the lower cavity (50); Wherein, at least one of the first fan part (80) and the second fan part (90) is a cross flow fan, and the axis of the cross flow fan is arranged in a horizontal direction. An air conditioner, comprising an indoor unit, characterized in that the indoor unit is the indoor unit according to any one of claims 1 to 16. A method for controlling an air conditioner, the method being used to control the air conditioner in claim 17, wherein the method includes the following steps: The air conditioner includes a cooling mode and a heating mode. When the controller of the air conditioner controls the air conditioner to be in the cooling mode, the upper ventilation channel (11) realizes air outlet, and the lower ventilation channel (12) realizes air intake. When the air conditioner is in the heating mode, the upper ventilation channel (11) realizes air intake, and the lower ventilation channel (12) realizes air discharge. The method according to claim 18, wherein the method further comprises the following steps: The controller can control the working state of the first fan part (80) and the second fan part (90) according to the indoor temperature; When the air conditioner is in the cooling mode, when the indoor temperature is within a first preset value, the controller controls the first fan unit (80) and the second fan unit (90) to operate at the same time. When the indoor temperature is lower than the first preset value, the controller controls one of the first fan unit (80) and the second fan unit (90) to stop operation; When the air conditioner is in the heating mode and the indoor temperature is within a second preset value, the controller controls the first fan unit (80) and the second fan unit (90) to operate simultaneously, When the indoor temperature is higher than the first preset value, the controller controls one of the first fan part (80) and the second fan part (90) to stop operation. The method of claim 19, wherein: When the controller controls the air conditioner to be in the cooling mode, the upper volute switching portion (31) is located at the second position, and the lower volute switching portion (32) is located at the first position; The controller controls the first fan unit (80) to perform a blowing operation, and the controller controls the second fan unit (90) to stop the blowing operation. The method according to claim 20, wherein the air conditioner further comprises a heating mode, and when the controller controls the air conditioner to be in the heating mode, the upper volute switching unit (31) Located at the first position, the lower volute switching portion (32) is located at the second position, the controller controls the first fan portion (80) to stop the blowing operation, and the controller controls the second fan The section (90) performs blowing operation. The method according to claim 19, wherein when the air conditioner is in the cooling mode, the air conditioner is in an oblique upward air outlet mode, and when the air conditioner is in the heating mode, the air conditioner The wind blows out diagonally downwards.

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