CN110762636A

CN110762636A - Indoor unit and air conditioner

Info

Publication number: CN110762636A
Application number: CN201911091921.2A
Authority: CN
Inventors: 董明珠; 吴俊鸿; 肖洪力; 黄鑫; 李业强; 梁博; 李树云; 李建建; 何博
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-02-07
Anticipated expiration: 2039-11-08
Also published as: CN110762636B

Abstract

The application provides an indoor unit and an air conditioner. The indoor unit comprises a first shell (10) and a second shell (15), wherein the first shell (10) is circular, the second shell (15) is square, a fan is arranged in the first shell (10), a heat exchanger (14) is arranged in the second shell (15), a first air opening (11) is formed in the first shell (10), a second air opening (12) is formed in the second shell (15), and the heat exchanger (14) is arranged between the first air opening (11) and the second air opening (12). According to the indoor unit, the heat exchanger can be large in heat exchange area, the space where the fan is located can be fully utilized, and the structure of the indoor unit is compact.

Description

Indoor unit and air conditioner

Technical Field

The application relates to the technical field of air conditioning, in particular to an indoor unit and an air conditioner.

Background

No matter the existing cabinet air conditioner adopts a centrifugal fan or a cross-flow fan, when a certain air quantity requirement is required, the whole machine size is overlarge, and when the axial-flow fan is adopted, the whole machine size required by the same air quantity is smaller.

However, when a circular cabinet machine is adopted, the heat exchange area of the heat exchanger is small, so that the heat exchange amount is still insufficient, and if the cabinet machine with other shapes is adopted, although the heat exchange area of the heat exchanger can be increased, the installation space of the fan is too large, and the space utilization rate is insufficient.

At present, no scheme can well solve the problems.

Disclosure of Invention

Therefore, the technical problem that this application will be solved lies in providing an indoor set and air conditioner, can enough make the heat exchanger have great heat transfer area, can make fan place space obtain abundant utilization again for the structure of indoor set is compacter.

In order to solve the problem, the application provides an indoor unit, including first casing and second casing, first casing is circular, and the second casing is square, is provided with the fan in the first casing, is provided with the heat exchanger in the second casing, is provided with first wind gap on the first casing, is provided with the second wind gap on the second casing, and the heat exchanger setting is between first wind gap and second wind gap.

Preferably, the heat exchanger is an annular structure having a shape matching the shape of the second housing.

Preferably, one side of the annular structure is open, and a wind shielding structure is arranged at the opening.

Preferably, the first tuyere is arranged at the top of the first shell, and the first tuyere is an annular tuyere.

Preferably, the second tuyere includes at least two tuyeres, the at least two tuyeres being disposed on two opposite sidewalls of the second housing, and the heat exchanger being disposed between the at least two tuyeres.

Preferably, a connecting section is arranged between the first shell and the second shell, a first end of the connecting section is circular and is fixedly connected with the first shell, and a second end of the connecting section is square and is fixedly connected with the second shell.

Preferably, the fan is a counter-rotating fan.

Preferably, a flow guide device is arranged at the connecting position of the first shell and the second shell.

Preferably, the guiding device comprises a guiding ring and a rectifying plate arranged in the guiding ring, the rectifying plate extends along the axial direction of the guiding ring, two sides of the rectifying plate are connected to the inner wall of the guiding ring, and the rectifying plate divides a guiding passage of the guiding ring into at least two rectifying areas.

Preferably, the number of the rectifying plates is multiple, and the multiple rectifying plates are parallel or intersected in the flow guide ring.

Preferably, the rectifying plate comprises at least two straight plates, wherein the two straight plates are perpendicularly intersected, and the intersection line is positioned on the central axis of the flow guide ring.

Preferably, the cowling panel is a plurality of, and a plurality of cowling panels divide into two sets ofly, and each cowling panel in the first group cowling panel is parallel to each other, and each cowling panel in the second group cowling panel is parallel to each other, and first group cowling panel is perpendicular to the second group cowling panel.

Preferably, the inner peripheral wall of the deflector ring is provided with a first silencing hole.

Preferably, the flow guiding ring comprises a first inner cylinder and a first outer cylinder, the first inner cylinder is located on the inner peripheral side of the first outer cylinder, and a first silencing hole is formed in the first inner cylinder.

Preferably, a transverse baffle is further arranged between the first inner cylinder and the first outer cylinder, the transverse baffle is arranged along the circumferential direction of the flow guide ring, and the cavity surrounded by the first inner cylinder and the first outer cylinder is axially divided into at least two cavities.

Preferably, a second inner cylinder is further arranged between the first inner cylinder and the first outer cylinder, and a first silencing hole is formed in the second inner cylinder.

Preferably, a second outer cylinder is arranged between the second inner cylinder and the first outer cylinder, and a first silencing hole is formed in the second outer cylinder.

Preferably, the thickness of the first outer barrel is greater than the thickness of the second outer barrel.

Preferably, the first shell is an upper shell, and the second shell is a lower shell; or the first shell is a lower shell, and the second shell is an upper shell.

According to another aspect of the present application, an air conditioner is provided, which includes an indoor unit, and the indoor unit is the indoor unit described above.

The application provides an indoor set, including first casing and second casing, first casing is circular, and the second casing is square, is provided with the fan in the first casing, is provided with the heat exchanger in the second casing, is provided with first wind gap on the first casing, is provided with the second wind gap on the second casing, and the heat exchanger setting is between first wind gap and second wind gap. This indoor set adopts one end casing to be circular, the other end casing is square structure, and set up the heat exchanger in square structure, set up the fan in circular structure, can the different characteristics of make full use of shell structure, set up suitable part in suitable shell structure, thereby can utilize and realize good cooperation between circular casing and the fan, guarantee this part compact structure, the complete machine size is less, can utilize simultaneously to realize good cooperation between square casing and the heat exchanger, guarantee that the heat exchanger of this part structure can have bigger heat exchanger area, do not receive the restriction of circular casing, thereby can enough make the heat exchanger have great heat transfer area, can make the space of fan obtain abundant utilization again, make the structure of indoor set compacter, structural layout is more reasonable.

Drawings

Fig. 1 is a schematic perspective view of a flow guide device of an indoor unit according to an embodiment of the present disclosure;

fig. 2 is a schematic cross-sectional view of a flow guide device of an indoor unit according to an embodiment of the present disclosure;

FIG. 3 is an enlarged schematic view of FIG. 2 at A;

fig. 4 is a perspective view of an indoor unit according to an embodiment of the present application;

fig. 5 is a flow chart of the air flow of the indoor unit according to the embodiment of the present application under the cooling condition;

fig. 6 is a flow chart of air flow in a heating condition of an indoor unit according to an embodiment of the present application;

fig. 7 is a schematic structural view of a heat exchanger of an indoor unit according to an embodiment of the present application.

The reference numerals are represented as:

1. a flow guide ring; 2. a rectifying plate; 3. a first muffling hole; 4. a first inner cylinder; 5. a first outer barrel; 6. a second inner barrel; 7. a second outer barrel; 8. a transverse baffle; 9. a second muffling hole; 10. a first housing; 11. a first tuyere; 12. a second tuyere; 13. a counter-rotating fan; 14. a heat exchanger; 15. a second housing; 16. a wind shielding structure; 17. and (4) connecting the sections.

Detailed Description

Referring to fig. 1 to 7 in combination, according to an embodiment of the present application, an indoor unit includes a first casing 10 and a second casing 15, where the first casing 10 is circular, the second casing 15 is square, a fan is disposed in the first casing 10, a heat exchanger 14 is disposed in the second casing 15, a first air opening 11 is disposed on the first casing 10, a second air opening 12 is disposed on the second casing 15, and the heat exchanger 14 is disposed between the first air opening 11 and the second air opening 12.

This indoor set adopts one end casing to be circular, the other end casing is square structure, and set up heat exchanger 14 in square structure, set up the fan in circular structure, can the different characteristics of make full use of shell structure, set up suitable part in suitable shell structure, thereby can utilize and realize good cooperation between circular casing and the fan, guarantee this part compact structure, the complete machine size is less, can utilize simultaneously to realize good cooperation between square casing and the heat exchanger, guarantee that this part structure's heat exchanger 14 can have bigger heat exchanger area, do not receive the restriction of circular casing, thereby can enough make heat exchanger 14 have great heat transfer area, can make the space of fan obtain abundant utilization again, make the structure of indoor set compacter, structural configuration is more reasonable.

In one embodiment, the first housing 10 is an upper housing and the second housing 15 is a lower housing.

In another embodiment, the first housing 10 is a lower housing and the second housing 15 is an upper housing. The heat exchanger 14 is an annular structure having a shape matching that of the second housing 15. Preferably, the heat exchanger 14 is shaped as a rectangular ring, and the corner positions of the rectangular ring are transitionally connected through a circular arc structure.

One side of the ring structure is open, and a wind shielding structure 16 is arranged at the opening. The opening is formed in one side of the annular structure, so that a space is reserved when the heat exchange tubes are arranged, the problem that the heat exchange tubes cannot be installed due to too close structural distances at two ends of the heat exchanger 14 is avoided, and the structural arrangement rationality of the heat exchanger 14 is improved. After leaving this opening, when heat exchanger 14 during operation, just probably lead to the air directly to get into the wind channel from this opening, and do not carry out the heat transfer through heat exchanger 14, lead to the heat transfer effect of heat exchanger to reduce, consequently need form the block to this opening through structure 16 that keeps out the wind, guarantee that the air homoenergetic that gets into inside wind channel can carry out abundant heat transfer through heat exchanger 14, improve heat exchange efficiency of heat exchanger 14.

First wind gap 11 sets up at the top of first casing 10, and first wind gap 11 is annular wind gap to can form wide angle air-out, increase air supply scope, improve air supply comfort level.

The second air port 12 comprises at least two air ports, the at least two air ports are arranged on two opposite side walls of the second shell 15, and the heat exchanger 14 is arranged between the at least two air ports, so that the air inlet volume can be increased when air is fed downwards, the heat exchange efficiency is improved, and the air supply volume can be increased when air is discharged downwards.

A connecting section 17 is arranged between the first shell 10 and the second shell 15, a first end of the connecting section 17 is circular and is fixedly connected with the first shell 10, and a second end of the connecting section 17 is square and is fixedly connected with the second shell 15.

This linkage segment 17 can realize the natural transition between first casing 10 and the second casing 15 and link up, can be regardless of the difference of first casing 10 and the structure of second casing 15 for good fixed connection between the two is in the same place, has reduced the connection degree of difficulty.

The fan is a counter-rotating fan 13.

In this embodiment, the fan is an axial flow fan, the axial flow fan is disposed in the air duct between the first air port 11 and the second air port 12, and the heat exchanger 14 is disposed at the second air port 12. In the working process of the air conditioner, when the air conditioner is in a refrigerating state, a lower air inlet and upper air outlet mode can be selected, so that cold air enters the air channel through the second air opening 12 and flows out of the air channel through the first air opening 11, and then bath type air outlet is formed; when being in the state of heating, can select down the last air inlet mode of air-out to make cold air get into the wind channel through second wind gap 12, flow out the wind channel through first wind gap 11, then form the transpiration formula air-out, thereby improve the air-out comfort level. The first air port 11 is an annular air outlet; and/or the second tuyere 12 comprises two tuyeres arranged oppositely. In this embodiment, first wind gap 11 is annular air outlet, and second wind gap 12 includes a plurality of wind gaps, can realize the wide angle air supply, reaches the effect of reinforceing convection current and heat transfer.

The axial flow fan is a disrotatory axial flow fan, the disrotatory axial flow fan comprises an upper axial flow fan blade and a lower axial flow fan blade, and the air supply directions of the upper axial flow fan blade and the lower axial flow fan blade are consistent.

L1 is the minimum clearance between the heat exchanger 14 and the shell, the minimum clearance is 5-100mm, the heat exchanger 14 has a heat exchange surface extending along the length direction of the shell, and the heat exchange surface is an arc surface extending along the circumferential direction.

L2 is that the axial distance of fan subassembly and heat exchanger 14 is 5-500mm, when the fan operation, a plurality of axial compressor fan blade air supply direction is unanimous, it is opposite to revolve to the direction to include two or more axial compressor fan blades at least, according to the axial compressor fan size of disrotatory and reduce the wind channel flow loss, design upper portion casing for circular, can guarantee the whole quick-witted size that reduces greatly when the amount of wind, the lower part adopts square structural design, can guarantee the sufficient heat transfer area of annular heat exchanger and arrange the space, can provide sufficient space for arranging of other parts such as electrical apparatus box simultaneously, adopt the shell structure design of upper circle below, it provides sufficient space to arrange for other parts simultaneously to guarantee under the less condition of whole machine size.

According to the air duct structure, the annular heat exchanger is adopted, the inner space of the second shell 15 is fully utilized, the heat exchange area of the heat exchanger 14 is increased, the resistance coefficient of the traditional V-shaped heat exchanger is reduced, the simulated speed distribution cloud chart of the heat exchanger shows that the area of a flow passage clamped by the V-shaped heat exchanger is small, an accelerating flow passage is formed, the entrance attack angle is influenced, the performance of the fan blade is reduced, the loss is increased, no obvious low-speed area exists on the surface of the annular heat exchanger, the uniform speed distribution is realized, and the annular heat exchanger has better flow characteristics.

TABLE 1 air volume of different heat exchangers at the same rotation speed

As shown in Table 1, it can be seen from the simulated air volume of different heat exchangers at the same rotation speed, the air volume of the annular heat exchanger is increased by 334m compared with that of the V-shaped heat exchanger at the same rotation speed (1400rpm)³H (upper outlet air) 396m³And h (lower outlet).

When the air conditioner is in an upper air inlet and lower air outlet mode, airflow enters the first shell from the first air port 11, then moves downwards under the action of the axial flow fan, after the airflow is guided by the flow guide device and is reduced in noise, the airflow enters the inner peripheral side of the heat exchanger, and then flows out from the second air port 12 of the second shell after heat exchange of the heat exchanger, so that the airflow and the heat exchanger can fully exchange heat, the heat exchange efficiency is improved, meanwhile, the structure of the flow guide device can be utilized to effectively reduce the gas flowing noise possibly brought by the change of the cross section of the shell at the connecting position of the first shell and the second shell, and the noise volume is reduced while the gas flowing efficiency is improved.

When the air conditioner is in a lower air inlet and upper air outlet mode, airflow enters the second shell from the second air opening 12 of the second shell, enters the inner peripheral side of the heat exchanger after heat exchange of the heat exchanger, then ascends under the action of the axial flow fan, and enters the first shell after flow guiding and noise reduction of the flow guiding device when reaching the position of the flow guiding device, and then is blown out from the first air opening 11 of the first shell under the action of the axial flow fan.

In the fifth drawing, in the structure of the air conditioner, two second air ports 12 are arranged in the circumferential direction of a heat exchanger 14, the structure is a combined surface of two curved surfaces and a plane, an annular heat exchanger is arranged in an internal air duct, a fan assembly is composed of a plurality of axial flow fan blades, a fixing member and a driving member, the fan assembly is arranged in the internal air duct and is located above the heat exchanger 14, in this embodiment, 2 axial flow fan blades are preferably arranged, namely an upper axial flow fan blade and a lower axial flow fan blade, when the fan operates, the air supply directions of the plurality of axial flow fan blades are consistent, and the rotation directions of at least two or more axial flow fan.

In fig. five, the schematic flow diagram of the air flow organization under the refrigeration condition is shown. When the air conditioner refrigerates, as shown by an arrow in the fifth drawing, the fan driving assembly controls the multi-axial-flow fan to rotate simultaneously, so that cold air is supplied upwards, the air enters the heat exchange air duct of the air conditioner from the second air port 12, enters the annular heat exchanger 14 for heat exchange after being rectified and silenced by the flow guide ring 1, and is blown out from the annular air port at the upper part, so that cold air blown out of the air conditioner can be conveyed to a farther distance, the air supply angle is wider, the convection and heat exchange of air flow are enhanced, and quick refrigeration is realized.

In fig. six, the schematic flow diagram of the air flow organization under the heating condition is shown. When the air conditioner heats, as shown by an arrow in the sixth figure, the fan driving assembly controls the multi-axial-flow fan to rotate simultaneously, so that hot air is blown downwards, the air enters a heat exchange air duct of the air conditioner from an upper annular air opening, enters the annular heat exchanger 14 for heat exchange after being rectified and silenced by the flow guide ring 1, and is blown out from a lower air opening of the air conditioner, so that hot air in the air conditioner is blown out from a lower part and then rises, and the lower part is provided with the multiple air openings, so that the air supply distance of the hot air is farther, the air supply range is larger, the cold and hot air in the whole space is subjected to convection and heat exchange, the temperature distribution in a room is uniform, and the use comfort of a user is improved.

After the air conditioner operates for a period of time in a refrigeration mode, the fan driving assembly can timely control the multi-axial-flow fan to change the original rotating direction, so that cold air is converted from upward air supply to downward air supply, the temperature drop of lower air flow is accelerated, meanwhile, the local supercooling of upper air flow is avoided, the temperature change of the air flow in the whole space is balanced, and the convection and heat exchange of cold and hot air in the space are enhanced; meanwhile, after the air conditioner operates for a period of time in the heating mode, the fan driving assembly can also control the multi-axial-flow fan to change the original rotating direction in due time, so that the hot air is converted from downward air supply to upward air supply, and the temperature rise of the upper airflow is accelerated. The position of the air outlet is changed by adjusting the rotating direction of the fan in real time, so that the temperature in the space is uniformly distributed, and the use comfort of a user is improved.

A flow guide device is provided at a connection position of the first housing 10 and the second housing 15.

The guiding device comprises a guiding ring 1 and a rectifying plate 2 arranged in the guiding ring 1, wherein the rectifying plate 2 extends along the axial direction of the guiding ring 1, the two sides of the rectifying plate 2 are connected to the inner wall of the guiding ring 1, and the rectifying plate 2 divides a guiding channel of the guiding ring 1 into at least two rectifying areas.

The guide ring 1 is positioned between the fan and the heat exchanger 14 and used for guiding the flow of the air flow in the internal air channel, on one hand, the air flow flowing through the guide ring 1 is guided and rectified, on the other hand, the air flow flowing through the guide ring 1 can be silenced, the flow noise of the air flow is reduced, and the flow efficiency of the air flow is improved. The above-mentioned internal air duct communicates with the first tuyere 11 and the second tuyere 12, respectively.

In this embodiment, the upper edge of the deflector ring 1 extends to the inner wall of the first housing, and the lower edge of the deflector ring 1 extends to the end surface of the heat exchanger and corresponds to the inner edge of the heat exchanger.

This guiding device has add cowling panel 2 in water conservancy diversion circle 1, because cowling panel 2 is located water conservancy diversion circle 1 inside, and separate for two at least rectification region through water conservancy diversion circle 1, consequently not only can utilize water conservancy diversion circle 1 itself to carry out the rectification to the air current of water conservancy diversion circle 1 internal circumference side, and also can utilize cowling panel 2 to carry out the rectification to the air current that flows through water conservancy diversion circle 1 and be close to cowling panel 2 region, consequently can carry out the rectification of wider scope and bigger region to the air current that flows through water conservancy diversion circle 1, make the air current homoenergetic of flowing through water conservancy diversion circle 1 effectively rectify, consequently can reduce the air current in the wind channel more greatly and the flow loss that causes in disorder flow, improve the air current flow efficiency, improve the water conservancy diversion effect of water conservancy diversion circle.

The extension line of cowling panel 2 along the axial is the straight line, can guarantee that cowling panel 2 can not take place the bending along the in-process that the axial direction extends, consequently can play more effective rectification effect for the air current homoenergetic that gets into in the water conservancy diversion circle 1 can form regular straight line air current under cowling panel 2's rectification effect, reduces the air current more effectively and flows the produced flow loss of in-process in the wind channel.

The rectifying plate 2 is a straight plate or an arc-shaped plate. In this embodiment, the rectifying plate 2 is a straight plate or an arc-shaped plate, specifically, on the basis that an extension line of the rectifying plate along the axial direction is a straight line, in a cross section perpendicular to the extension line, the rectifying plate is a straight line or an arc line. The rectifying plate formed under the condition can play a linear rectifying role on the airflow in the flowing direction of the airflow regardless of being an arc plate or a straight plate, and both the arc plate and the straight plate can play a good rectifying effect and reduce the flowing resistance of the airflow.

Preferably, there are a plurality of fairing plates 2, and a plurality of fairing plates 2 are parallel or intersect in the baffle 1. The plurality of rectifying plates 2 can divide the internal flow passage of the flow guiding ring 1 into more rectifying areas, so that the flow of gas flowing through each rectifying area is limited, the rectifying plates 2 on the peripheral side of each area have a more obvious rectifying effect on the gas flowing through the area, the gas flow in the center and the peripheral side of the flow guiding ring 1 can be effectively rectified, and a better rectifying effect is achieved.

Preferably, the fairing 2 includes at least two straight plates, wherein two straight plates intersect perpendicularly, and the intersection line is located the central axis of water conservancy diversion circle 1, can guarantee to be located the most central region the air current of being difficult to be rectified by the internal perisporium of water conservancy diversion circle 1, also can be rectified by straight platelike fairing 2 to each region of the water conservancy diversion passageway of water conservancy diversion circle 1 has all been guaranteed to effectively rectify, further improves rectification effect.

In this embodiment, the cowling panels 2 are a plurality of, and a plurality of cowling panels 2 divide into two sets ofly, and each cowling panel 2 in the first group cowling panel 2 is parallel to each other, and each cowling panel 2 in the second group cowling panel 2 is parallel to each other, and first group cowling panel 2 is perpendicular to second group cowling panel 2. In this embodiment, each group of rectifying plates 2 includes three rectifying plates 2, six rectifying plates 2 in total cooperate with the flow guide ring 1, the flow guide channel of the flow guide ring 1 is divided into 16 rectifying regions, when the fan blows out a rotating and irregular airflow, the airflow flows through the 16 rectifying regions under the guidance of the flow guide ring 1, a regular linear airflow is formed, the effect of a gas rectifier is achieved, and the flow loss caused by the disordered flow of the airflow in the air duct is reduced.

Preferably, the inner peripheral wall of the deflector ring 1 is provided with a first muffling hole 3. Through set up the amortization hole on water conservancy diversion circle 1, can utilize the amortization hole on the water conservancy diversion circle 1 to carry out the amortization to the air current that flows through water conservancy diversion circle 1 to reduce the aerodynamic noise of the air current that flows through water conservancy diversion circle 1. Preferably, the aperture of the first muffling hole 3 is 0.5-1.5 mm, and in the cross section perpendicular to the central axis, the distance between adjacent first muffling holes 3 is 6mm, so that a microporous muffling cylinder can be formed, which has the muffling characteristics of wide frequency band, small volume and high efficiency, and the aperture size is selected, so that the processing is convenient and the blockage is not easy to occur during the use.

The flow guide ring 1 comprises a first inner cylinder 4 and a first outer cylinder 5, the first inner cylinder 4 is located on the inner peripheral side of the first outer cylinder 5, and a first silencing hole 3 is formed in the first inner cylinder 4. A silencing cavity communicated with the first silencing hole 3 is formed between the first inner cylinder 4 and the second inner cylinder 5, and the silencing cavity can be used for further enhancing the noise reduction effect of the flow guide ring 1.

Preferably, a transverse baffle 8 is further arranged between the first inner cylinder 4 and the first outer cylinder 5, the transverse baffle 8 is arranged along the circumferential direction of the deflector ring 1, and the cavity surrounded by the first inner cylinder 4 and the first outer cylinder 5 is axially divided into at least two parts. Through setting up horizontal baffle 8, can prevent effectively that the sound wave propagation along the axial direction of pipe from taking place in the cavity between first inner tube 4 and the first urceolus 5, further improve amortization noise reduction effect.

Preferably, the thickness of the transverse baffle 8 is 3 mm.

A second inner cylinder 6 is arranged between the first inner cylinder 4 and the first outer cylinder 5, and a first silencing hole 3 is arranged on the second inner cylinder 6.

A second outer cylinder 7 is arranged between the second inner cylinder 6 and the first outer cylinder 5, and a first silencing hole 3 is arranged on the second outer cylinder 7. Through increasing second inner tube 6 and the outer section of thick bamboo 7 of second, and all set up the first bloop 3 that link up on second inner tube 6 and the outer section of thick bamboo 7 of second, can form the multilayer perforating section of thick bamboo to form multilayer amortization noise reduction structure on the section of thick bamboo wall of water conservancy diversion circle 1, play better amortization noise reduction effect.

Preferably, the thickness of the second inner cylinder 6 is greater than the thickness of the second outer cylinder 7. Specifically, in this embodiment, the thickness of the second inner cylinder 6 is 4mm, and the thickness of the second outer cylinder 7 is 2mm, so that the occupation of the cylinder body on the space of the cylinder wall of the flow guiding ring 1 can be reduced, a sound-deadening chamber can be formed more effectively, and the sound-deadening effect can be improved. In this embodiment, the thickness of the second outer cylinder 7 is smaller than that of the second inner cylinder 6, because the second inner cylinder 6 is closer to the airflow, the effect of the vibration generated when the airflow flows on the second inner cylinder 6 is larger, and if the thickness of the second inner cylinder 6 is too small, the second inner cylinder 6 vibrates along with the airflow, so that the vibration and noise reduction effect of the second inner cylinder 6 on the airflow is reduced.

Preferably, the rectifying plate 2 is provided with a second silencing hole 9; and/or the rectifying plate 2 is made of sound absorption materials. When the airflow flows through the rectifying plate 2, the rectifying plate 2 can not only perform the rectifying function on the airflow, but also perform the silencing function, thereby reducing the airflow flowing loss and the airflow flowing noise.

When the inner wall of the flow guide ring 1 and the rectifying plate 2 are both provided with the silencing holes, the two are combined for silencing, so that the pneumatic noise and the air cavity resonance sound can be greatly reduced.

The indoor unit is, for example, a cabinet air conditioner.

According to the embodiment of the application, the air conditioner comprises the indoor unit.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

1. The utility model provides an indoor unit, its characterized in that includes first casing (10) and second casing (15), first casing (10) are circular, second casing (15) are square, be provided with the fan in first casing (10), be provided with heat exchanger (14) in second casing (15), be provided with first wind gap (11) on first casing (10), be provided with second wind gap (12) on second casing (15), heat exchanger (14) set up first wind gap (11) with between second wind gap (12).

2. Indoor unit according to claim 1, characterized in that the heat exchanger (14) is an annular structure with a shape matching the shape of the second casing (15).

3. Indoor unit according to claim 2, characterized in that the annular structure is open on one side and that a wind-shielding structure (16) is arranged at the opening.

4. Indoor unit according to claim 1, characterized in that the first tuyere (11) is provided at the top of the first casing (10), the first tuyere (11) being an annular tuyere.

5. Indoor unit according to claim 1, characterized in that the second tuyere (12) comprises at least two tuyeres provided on two opposite side walls of the second casing (15), the heat exchanger (14) being provided between the at least two tuyeres.

6. Indoor unit according to claim 1, characterized in that a connecting section (17) is provided between the first casing (10) and the second casing (15), a first end of the connecting section (17) is round and is fixedly connected to the first casing (10), and a second end of the connecting section (17) is square and is fixedly connected to the second casing (15).

7. Indoor unit according to claim 1, characterized in that the fan is a contra-rotating fan (13).

8. Indoor unit according to any of claims 1 to 7, characterized in that a flow guide is provided at the location of the connection of the first casing (10) and the second casing (15).

9. The indoor unit of claim 8, characterized in that the guiding device comprises a guiding ring (1) and a rectifying plate (2) arranged in the guiding ring (1), the rectifying plate (2) extends along the axial direction of the guiding ring (1), two sides of the rectifying plate (2) are connected to the inner wall of the guiding ring (1), and the rectifying plate (2) divides the guiding channel of the guiding ring (1) into at least two rectifying areas.

10. The indoor unit of claim 9, wherein the rectifying plate (2) is provided in plurality, and the plurality of rectifying plates (2) are parallel to or intersect with the flow guiding ring (1).

11. Indoor unit according to claim 10, characterized in that the straightening plate (2) comprises at least two straight plates, wherein the two straight plates intersect perpendicularly and the intersection line is located on the central axis of the deflector ring (1).

12. The indoor unit according to claim 9, wherein the number of the current plates (2) is plural, the plural current plates (2) are divided into two groups, the current plates (2) in the first group of the current plates (2) are parallel to each other, the current plates (2) in the second group of the current plates (2) are parallel to each other, and the first group of the current plates (2) is perpendicular to the second group of the current plates (2).

13. Indoor unit according to any of claims 9 to 12, characterized in that the deflector ring (1) is provided with a first muffling aperture (3) on its inner circumferential wall.

14. The indoor unit according to claim 13, wherein the baffle ring (1) comprises a first inner cylinder (4) and a first outer cylinder (5), the first inner cylinder (4) is located on an inner peripheral side of the first outer cylinder (5), and the first muffling hole (3) is provided in the first inner cylinder (4).

15. The indoor unit of claim 14, wherein a transverse baffle (8) is further disposed between the first inner cylinder (4) and the first outer cylinder (5), the transverse baffle (8) is disposed along the circumferential direction of the deflector ring (1), and divides a cavity enclosed by the first inner cylinder (4) and the first outer cylinder (5) into at least two cavities along the axial direction.

16. The indoor unit according to claim 14, wherein a second inner cylinder (6) is further provided between the first inner cylinder (4) and the first outer cylinder (5), and the first muffling hole (3) is provided in the second inner cylinder (6).

17. The indoor unit according to claim 16, wherein a second outer tube (7) is provided between the second inner tube (6) and the first outer tube (5), and the first muffling hole (3) is provided in the second outer tube (7).

18. Indoor unit according to claim 17, characterized in that the thickness of the first outer tube (6) is greater than the thickness of the second outer tube (7).

19. Indoor unit according to claim 1, characterized in that the first casing (10) is an upper casing and the second casing (15) is a lower casing; or, the first shell (10) is a lower shell, and the second shell (15) is an upper shell.

20. 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 19.