CN210740548U

CN210740548U - Indoor unit and air conditioner with same

Info

Publication number: CN210740548U
Application number: CN201921397349.8U
Authority: CN
Inventors: 董明珠; 夏光辉; 王现林; 李振华; 文进康; 宁强延; 罗永前; 杨永祥; 黄煜鹏; 刘慧�
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-06-12
Anticipated expiration: 2029-08-26

Abstract

The utility model provides an indoor unit and have its air conditioner. The indoor unit comprises a shell, wherein the shell is provided with an 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 is provided with a first position and a second position, when the volute switching part is located at the first position, the volute switching part is matched with the ventilation channel to form an air inlet channel, and when the volute switching part is located at the second position, the volute switching part is matched with the ventilation channel to form an air outlet channel. The size of the air inlet area of the ventilation channel of the indoor unit is changed by arranging the volute switching part, so that whether the corresponding ventilation channel is an air outlet channel or an air inlet channel is selected according to the working mode of the indoor unit. Meanwhile, the volute switching part is set to be the air outlet channel, the length of the air outlet channel can be prolonged, the air speed at the air outlet is higher, the air inlet volume and the air outlet volume of the indoor unit can be effectively increased through the arrangement, and the use experience of a user is effectively improved.

Description

Indoor unit and air conditioner with same

Technical Field

The utility model relates to an air conditioning equipment technical field particularly, relates to an indoor unit and have its air conditioner.

Background

The existing wall-mounted air conditioner indoor unit is often provided with only one air outlet, and the air supply range and performance are limited. And the air inlet volume of the air inlet is limited, so that various living requirements of people cannot be met. The air conditioner that has upper and lower two air outlets, not only the air-out scope is wide, can open the air outlet air supply or air outlet air supply mode down according to the user's demand moreover, and the air supply mode has the variety, but is subject to the air inlet area, and the performance of upper and lower air-out air conditioner is hardly promoted by a wide margin.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides an indoor unit and have its air conditioner to solve the problem that the intake of air conditioner is little among the prior art.

In order to achieve the above object, according to an aspect of the present invention, there is provided an indoor unit, including: the shell is provided with an 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, when the volute switching part is located at the first position, the volute switching part is matched with the ventilation channel to form an air inlet channel, and when the volute switching part is located at the second position, the volute switching part is matched with the ventilation channel to form an air outlet channel.

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

Further, the ventilation passageway includes ventilation passageway and lower ventilation passageway, and the spiral case switching part includes spiral case switching part, and the indoor set includes: the heat exchanger is arranged in the shell to divide the containing cavity into an upper cavity and a lower cavity, the upper ventilation channel is communicated with the upper cavity, the lower ventilation channel is communicated with the lower cavity, the upper volute switching part is arranged at the opening of the upper ventilation channel, and the upper volute switching part is provided with a first position and a second position.

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

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

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

Furthermore, the first rotating volute casing is provided with a first air passage surface, when the first rotating volute casing is located at the first position, the first air passage surface and the side wall of the upper ventilation channel are enclosed to form an air inlet channel, and when the first rotating volute casing is located at the second position, the first air passage surface and the side wall of the upper ventilation channel are enclosed to form an air outlet channel.

Furthermore, the connection part of the first air duct surface and the side wall of the upper ventilation channel is in arc surface transition arrangement.

Further, the lower volute switching portion includes: the second rotating volute is movably connected with the side wall of the lower ventilation channel; and the second driving part is connected with the second rotary volute and can drive the second rotary volute to be positioned at the first position or the second position.

Furthermore, the second rotating volute casing is provided with a second air duct surface, when the second rotating volute casing is located at the first position, the second air duct surface and the side wall of the lower ventilation channel are enclosed to form an air inlet channel, and when the second rotating volute casing 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.

Furthermore, the connection part of the second air duct surface and the side wall of the lower ventilation channel is in arc surface transition arrangement.

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

Further, the first volute tongue is rotatably arranged relative to the housing, so that the first volute tongue is provided with a first closed position and a first open position, when the first volute tongue is located at the first closed position, the first volute tongue closes the opening of the upper ventilation channel, and when the first volute tongue is located at the first open position, the first volute tongue and at least one of the upper ventilation channel and the first rotary volute casing enclose the air inlet channel or the air outlet channel.

Further, the indoor unit further includes: and the second volute tongue is arranged in the lower cavity and is opposite to the second rotary 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 at the second closed position, the second volute tongue closes the opening of the lower ventilation channel, and when the second volute tongue is located at the second open position, the second volute tongue and at least one of the lower ventilation channel and the second rotary volute casing enclose the air inlet channel or the air outlet channel.

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

According to the utility model discloses an on the other hand provides an air conditioner, including the indoor set, the indoor set is foretell indoor set.

Use the technical scheme of the utility model, change the size of the air inlet area of the ventilation passageway of indoor set through setting up spiral case switching part to select corresponding ventilation passageway to be air-out passageway or inlet air channel according to the mode of operation of indoor set. The air inlet volume and the air outlet volume of the indoor unit can be effectively increased by the arrangement, and the use experience of a user is effectively improved.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

figure 1 shows a schematic structural view of a first embodiment of an indoor unit according to the present invention;

figure 2 shows a schematic structural view of a second embodiment of the indoor unit according to the present invention;

figure 3 shows a schematic structural view of a third embodiment of the indoor unit according to the present invention;

figure 4 shows a schematic structural view of a fourth embodiment of the indoor unit according to the present invention;

figure 5 shows a schematic structural view of a fifth embodiment of the indoor unit according to the present invention.

Wherein the figures include the following reference numerals:

10. a housing; 11. an upper ventilation channel; 12. a lower ventilation channel;

20. a heat exchanger;

31. an upper volute switching section; 311. a first rotary volute; 312. a first air duct face;

32. a lower volute switching section; 321. a second rotary volute; 322. a second air duct surface;

40. an upper cavity;

50. a lower cavity;

60. a first volute tongue;

70. a second volute tongue;

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

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

Referring to fig. 1 to 3, according to an 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 scroll switching portion. The housing 10 has a receiving cavity 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 when the volute switching part is located at the first position or the second position, the volute switching part is matched with the ventilation channel to form an air inlet channel or an air outlet channel.

In this embodiment, the volute switching unit is arranged to change the size of the air inlet area of the ventilation channel of the indoor unit, so as to select whether the corresponding ventilation channel is the air outlet channel or the air inlet channel according to the working mode of the indoor unit. Meanwhile, the volute switching part is set to be the air outlet channel, the length of the air outlet channel can be prolonged, the air speed at the air outlet is higher, the air inlet volume and the air outlet volume of the indoor unit can be effectively increased through the arrangement, and the use experience of a user is effectively improved.

When the volute switching part is located at the first position, the volute switching part is matched with the ventilation channel to form an air inlet channel, when the volute switching part is located at the second position, the volute switching part is matched with the ventilation channel to form an air outlet channel, and the cross-sectional area of an air inlet of the air inlet channel is larger than that of an air outlet of the air outlet channel. By selecting the ventilation channel with large cross-sectional area as the air inlet channel, the air inlet volume of the indoor unit can be effectively increased, the air outlet volume of the indoor unit is effectively increased, and the heat exchange performance of the indoor unit is improved.

As shown in fig. 1, the ventilation passage includes an upper ventilation passage 11 and a lower ventilation passage 12. The volute switching section includes an upper volute switching section 31, and the indoor unit includes the heat exchanger 20. The heat exchanger 20 is disposed in the case 10 to divide the receiving chamber into an upper chamber 40 and a lower chamber 50. The upper ventilation passage 11 communicates with the upper chamber 40, the lower ventilation passage 12 communicates with the lower chamber 50, the upper volute switching portion 31 is disposed at an opening of the upper ventilation passage 11, and the upper volute switching portion 31 has a first position and a second position. The indoor unit is simple in structure and easy to process.

Specifically, the volute switching portion further includes a lower volute switching portion 32, the lower volute switching portion 32 being disposed at the opening of the lower ventilation channel 12, the lower volute switching portion 32 having a first position and a second position. This arrangement can effectively increase the intake of the lower ventilation path 12.

Wherein the lower volute switching part 32 is located at the second position when the upper volute switching part 31 is located at the first 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 casing may be introduced from the lower ventilation channel 12, or the airflow outside the casing may be introduced from the upper ventilation channel 11 into the casing to exchange heat with the heat exchanger, so that the practicability of the indoor unit is effectively improved.

Further, the upper volute switching portion 31 includes a first rotating volute 311 and a first driving portion. The first scroll 311 is movably connected to a sidewall of the upper vent passage 11. The first driving portion is connected to the first rotary scroll 311, and the first driving portion may drive the first rotary scroll 311 to be located at the first position or the second position. As shown in D1 in fig. 1, the position D1 is a rotation center of the first spiral casing 311, and the first driving portion may be a stepping motor which drives the first spiral casing 311 to rotate around the rotation center.

In order to reduce the wind resistance of the inlet and outlet wind, the first scroll case 311 is provided with a first air passage surface 312. When the first spiral case 311 is located at the first position, the first air passage surface 312 and the sidewall of the upper ventilation channel 11 are enclosed to form an air inlet channel, and when the first spiral case 311 is located at the second position, the first air passage surface 312 and the sidewall 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 cambered surface transition arrangement.

In the present embodiment, the lower volute switching portion 32 includes the second swivel volute 321 and the second driving portion. The second scroll 321 is movably connected to a sidewall of the lower vent passage 12. The second driving part is connected to the second spiral casing 321, and the second driving part may drive the second spiral casing 321 to be located at the first position or the second position. The arrangement makes the structure of the lower volute switching part 32 simple and easy to process. Here, the structure of the lower volute switching part 32 may be set in the same manner as the structure of the upper volute switching part 31, which can reduce the processing cost of the indoor unit. As shown in D2 in fig. 1, the position D2 is a rotation center of the second spiral casing 321, the second driving unit may be a stepping motor, the stepping motor drives the second spiral casing 321 to rotate around the rotation center, and the side C is an installation side of the indoor unit.

In order to further reduce the wind resistance of the inlet and outlet wind of the indoor unit, the second scroll casing 321 has a second air path surface 322. When the second spiral case 321 is located at the first position, the second air path surface 322 and the sidewall of the lower ventilation channel 12 are enclosed to form an air inlet channel, and when the second spiral case 321 is located at the second position, the second air path surface 322 and the sidewall of the lower ventilation channel 12 are enclosed to form an air outlet channel. The connection between the second air duct surface 322 and the side wall of the lower ventilation channel 12 is a cambered surface transition arrangement.

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 chamber 40, and the first volute tongue 60 is disposed opposite to the first spiral case 311. The second volute tongue 70 is disposed in the lower chamber 50, and the second volute tongue 70 is disposed opposite to the second spiral case 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 with respect to the housing 10 such that the first volute tongue 60 has a first closed position and a first open position. When the first volute tongue 60 is located at the first closed position, the first volute tongue 60 closes the opening of the upper vent passage 11. When the first volute tongue 60 is located at the first open position, the first volute tongue 60 and at least one of the upper ventilation passage 11 and the first rotary volute 311 are enclosed as an air inlet passage or an air outlet passage. The arrangement can prevent external dust or foreign matters from entering the indoor unit and affecting the service life of the indoor unit.

Further, as shown in fig. 5, the second volute tongue 70 may also be rotatably disposed relative to the housing 10 such 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 vent passage 12. When the second volute tongue 70 is located at the second open position, the second volute tongue 70 and at least one of the lower ventilation channel 12 and the second scroll casing 321 are enclosed to form an air inlet channel or an air outlet channel. The arrangement can effectively prevent foreign matters from entering the indoor unit, and the service life of the indoor unit is prolonged.

The indoor unit further includes a first fan unit 80 and a second fan unit 90. The first fan portion 80 is disposed in the upper cavity 40. The second fan portion 90 is disposed in the lower cavity 50. At least one of the first fan unit 80 and the second fan unit 90 is a cross flow fan, and an axis of the cross flow fan is arranged in a horizontal direction. As shown in fig. 1 to 3, the first and

second fan sections

80 and 90 are cross-flow fans. The air outlet quantity and the heat exchange performance of the indoor unit can be effectively improved by the arrangement.

The indoor unit in the above-mentioned embodiment can also be used for air conditioning equipment technical field, promptly according to the utility model discloses a further aspect provides an air conditioner. The air conditioner comprises an indoor unit, wherein the indoor unit is the indoor unit in the embodiment.

Specifically, the air conditioner has an air supply mode of air supply from an upper air inlet and air supply from a lower air inlet, and meanwhile, the air inlet area is increased by rotating the volute at the air inlet, so that the air inlet amount of the air conditioner is increased, and the performance of the air conditioner is improved. The indoor unit adopting the structure can select upper air outlet or lower air outlet according to needs, and simultaneously rotate the volute at the air inlet according to the upper air outlet or lower air outlet mode, so that the air inlet area is increased.

Through the spiral case (first rotatory spiral case and the rotatory spiral case of second) of rotatory air inlet department to change the spiral case position, can increase the air inlet area, realize the air supply of big amount of wind, help promoting air conditioner performance, adopt the air-out mode from top to bottom simultaneously, can select different air outlets according to refrigeration, heating, be of value to and promote room temperature distribution's homogeneity, promote the room travelling comfort.

As shown in fig. 1. The first swivel volute is rotatable about a volute center of rotation and the second swivel volute is rotatable about a volute center of rotation. The two cross-flow fan blades are respectively arranged at the upper side and the lower side of a heat exchanger of the air conditioner, the two volute tongues are respectively and correspondingly arranged at the air outlet areas of the corresponding cross-flow fan blades, the air conditioner is provided with an upper air inlet and a lower air inlet, when air needs to be discharged from the upper air inlet, the second volute rotates anticlockwise around the volute rotation center, air flow enters from the lower air inlet, and is blown out from the upper air inlet after heat exchange of the evaporator. When air needs to be discharged from the lower air inlet, the first volute rotates clockwise around the rotation center of the volute, air flow enters from the upper air inlet and is blown out from the lower air inlet after heat exchange of the evaporator. As shown in FIG. 1, the position A is an upper air inlet, and the position B is a lower air inlet.

When the air conditioner is in a closed state, as shown in fig. 1, the two rotary volutes do not perform rotary motion at the position shown in the figure. When the air conditioner refrigerates, as shown in fig. 2, the upper cross-flow fan blade runs, and the lower cross-flow fan blade does not run. The second volute rotates anticlockwise around the rotation center of the volute to the position shown in the figure, the first volute does not rotate, the air inlet area of the lower air inlet is increased, and air flow enters from the lower air inlet and is blown out from the upper air inlet after heat exchange of the evaporator. The first volute tongue also plays a role in prolonging the air duct, the air outlet speed of the upper air outlet is higher, and the air flow can be blown out for a longer distance. Compared with a common air conditioner, the air conditioner has the advantages that the air inlet amount is larger, the position of the upper air outlet is higher, the performance of the air conditioner is better, the shower type air supply effect is better, the air conditioner refrigeration effect is better, and the temperature drop is more uniform.

Fig. 3 shows the air conditioner heating operation. The lower cross-flow fan blade runs, and the upper cross-flow fan blade does not run. The first volute rotates clockwise around the volute rotation center to the position shown in the figure, the second volute does not rotate, the air inlet area of the upper air inlet is increased, air flow enters from the upper air inlet and is blown out from the lower air inlet after heat exchange of the evaporator, the second volute tongue also plays a role in prolonging the air channel, the air outlet speed of the lower air outlet is higher, and the air flow can be blown out for a longer distance. Compared with a common air conditioner, the air conditioner has the advantages that the air inlet volume is larger, the position of the lower air outlet is lower, the performance of the air conditioner is better, the carpet type air supply effect is better, the heating effect of the air conditioner is better, and the temperature rise is more uniform.

According to another aspect of the present invention, there is provided a method of controlling an air conditioner in the above, the method comprising the steps of: the air conditioner comprises a refrigerating mode and a heating mode, when the controller of the air conditioner controls the air conditioner to be in the refrigerating mode, the upper ventilation channel 11 realizes air outlet, the lower ventilation channel 12 realizes air inlet, and 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 may control the operating states of the first and

second fan units

80 and 90 according to the indoor temperature. When the air conditioner is in a 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 simultaneously, and 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 operating; when the air conditioner is in a heating mode, the controller controls the first and

second fan units

80 and 90 to simultaneously operate when the indoor temperature is within a second preset value, and controls one of the first and

second fan units

80 and 90 to stop operating when the indoor temperature is higher than the first preset value. Wherein the controller may control the first and

second fan units

80 and 90 to rotate forward and backward.

When the controller controls the air conditioner to be in the cooling mode, the upper volute switching part 31 is located at the second position, and the lower volute switching part 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 air conditioner further comprises a heating mode, when the controller controls the air conditioner to be in the heating mode, the upper volute switching part 31 is located at the first position, the lower volute switching part 32 is located at the second position, the controller controls the first fan part 80 to stop blowing, and the controller controls the second fan part 90 to perform blowing. When the air conditioner is in the cooling mode, the air conditioner is in an upward oblique air outlet mode, and when the air conditioner is in the heating mode, the air conditioner is in downward oblique air outlet mode.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An indoor unit, comprising:

a housing (10), the housing (10) having a receiving cavity provided with a ventilation channel;

the spiral case switching part, spiral case switching part movably set up in hold the intracavity, so that spiral case switching part has primary importance and second position, spiral case switching part is located during the primary importance, spiral case switching part with the ventilation passageway cooperatees and forms air inlet channel, when spiral case switching part is located the second position, spiral case switching part with the ventilation passageway cooperatees and forms the air-out passageway.

2. The indoor unit of claim 1, wherein a cross-sectional area of the inlet duct is larger than a cross-sectional area of the outlet duct.

3. Indoor unit according to claim 1 or 2, characterized in that the ventilation channels comprise an upper ventilation channel (11) and a lower ventilation channel (12), the volute switch comprises an upper volute switch (31), the indoor unit comprising:

the heat exchanger (20), the heat exchanger (20) set up in casing (10), in order to incite somebody to action it separates into upper chamber body (40) and lower chamber body (50) to hold the chamber, go up ventilation channel (11) with upper chamber body (40) are linked together, down ventilation channel (12) with lower chamber body (50) are linked together, go up spiral case switching part (31) set up in the opening part of last ventilation channel (11), go up spiral case switching part (31) have the first position with the second position.

4. The indoor unit according to claim 3, wherein the scroll switching portion further includes:

a lower volute switching portion (32), the lower volute switching portion (32) being disposed at an opening of the lower ventilation channel (12), the lower volute switching portion (32) having the first position and the second position.

5. Indoor unit according to claim 4, characterized in that the lower volute switch (32) is located in the second position when the upper volute switch (31) is located in the first position, and the lower volute switch (32) is located in the first position when the upper volute switch (31) is located in the second position.

6. The indoor unit according to claim 3, wherein the upper-volute switching section (31) includes:

a first rotary volute (311), said first rotary volute (311) being movably connected with a side wall of said upper ventilation channel (11);

a first driving portion connected to the first rotary scroll (311), the first driving portion driving the first rotary scroll (311) to be located at the first position or the second position.

7. Indoor unit according to claim 6, wherein the first scroll (311) has a first air path surface (312), and when the first scroll (311) is in the first position, the first air path surface (312) and the side wall of the upper ventilation channel (11) are enclosed as the air inlet channel, and when the first scroll (311) is in the second position, the first air path surface (312) and the side wall of the upper ventilation channel (11) are enclosed as the air outlet channel.

8. Indoor unit according to claim 7, characterized in that the connection of the first air duct surface (312) and the side wall of the upper ventilation channel (11) is a cambered transition.

9. The indoor unit according to claim 4, wherein the lower volute switching section (32) includes:

a second rotary volute (321), said second rotary volute (321) being movably connected with a side wall of said lower ventilation channel (12);

a second driving part connected with the second swivel scroll (321), the second driving part driving the second swivel scroll (321) to be located at the first position or the second position.

10. The indoor unit of claim 9, wherein the second scroll casing (321) has a second air path surface (322), and when the second scroll casing (321) is located at the first position, the second air path surface (322) and a side wall of the lower duct (12) are enclosed to form the air inlet path, and when the second scroll casing (321) is located at the second position, the second air path surface (322) and a side wall of the lower duct (12) are enclosed to form the air outlet path.

11. Indoor unit according to claim 10, characterized in that the junction of the second air duct surface (322) and the side wall of the lower ventilation channel (12) is a curved transition.

12. The indoor unit according to claim 6, further comprising:

a first volute tongue (60), the first volute tongue (60) being disposed within the upper cavity (40), the first volute tongue (60) being disposed opposite the first volute (311).

13. Indoor unit according to claim 12, characterized in that the first volute tongue (60) is rotatably arranged with respect to the casing (10) such 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 duct (11), and 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 duct (11) and the first rotary volute (311) enclose the air inlet duct or the air outlet duct.

14. The indoor unit according to claim 9, further comprising:

a second volute tongue (70), the second volute tongue (70) being disposed within the lower cavity (50), the second volute tongue (70) being disposed opposite the second volute (321).

15. Indoor unit according to claim 14, characterized in that the second volute tongue (70) is rotatably arranged with respect to the casing (10) such 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 duct (12), and when the second volute tongue (70) is in the second open position, the second volute tongue (70) encloses the air inlet duct or the air outlet duct with at least one of the lower ventilation duct (12) and the second rotary volute (321).

16. The indoor unit according to claim 3, further comprising:

a first fan section (80), the first fan section (80) being disposed within the upper cavity (40);

a second fan section (90), the second fan section (90) being disposed within 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 along the horizontal direction.

17. 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.