CN215490030U - Indoor unit of air conditioner - Google Patents

Abstract

The utility model discloses an air-conditioning indoor unit, which comprises an outer shell, a driving assembly and a fan assembly, wherein an installation inner cavity is formed in the outer shell; the driving assembly is positioned in the mounting inner cavity and comprises a driving part and an output shaft connected with the output end of the driving part; the fan assembly is connected with the output shaft, including the rotation portion, fixed frame body and a plurality of wind-guiding portion, a plurality of wind-guiding portion are formed between fixed frame body and rotation portion along the circumferencial direction dispersion of fixed frame body, wind-guiding portion includes wind-guiding top and wind-guiding root end, be formed with the wind-guiding passageway between the adjacent wind-guiding portion, the cross sectional dimension of wind-guiding passageway reduces from the wind-guiding top to the direction of wind-guiding root end gradually, the wind-guiding passageway that forms on the fan assembly reduces along the circulation direction of air current gradually, therefore, the circulation of air current in the wind-guiding passageway is acceleration state, the speed of air current outflow fan assembly has been improved, and then the circulation rate of air is improved.

Description

Indoor unit of air conditioner

Technical Field

The utility model belongs to the technical field of air conditioners, and particularly relates to an indoor unit of an air conditioner.

Background

The indoor unit of the ducted central air conditioner, which is similar to the end of a general central air conditioner and is in the form of a fan coil (including a fan and a coil for heat exchange), is generally called a ducted unit, and is generally placed on the top of a room, such as the top wall of a living room or bedroom (called a ceiling type for short). The centrifugal fan is widely applied as a power system for conveying airflow, and generally comprises a volute and an impeller arranged in the volute, wherein the impeller is used as a rotating part to do work on the airflow and provide energy for the airflow.

The centrifugal fan is a fan form which sucks fluid from the axial direction of the fan and throws the fluid out in the circumferential direction by utilizing the centrifugal force, the multi-wing centrifugal fan adopted in the current market mainly adopts a uniform-thickness blade with a single mean camber line, the blade adopts the same mean camber line design on the sections with different blade heights, the thickness of the blade in the chord length direction is equal, but the working capacity and the efficiency of the blade cannot be simultaneously considered, and the blade cannot meet the effective working capacity under the application scene of high static pressure, so that the requirement that the air quantity can be met only by improving the rotating speed is caused.

Disclosure of Invention

The utility model aims to provide an air-conditioning indoor unit, which aims to solve the problems that the blades of a centrifugal fan in the existing air-conditioning indoor unit in the prior art are of equal thickness, so that the air flow speed conveyed from a conveying channel between the blades is limited, the work-doing capacity and the specific conveying efficiency are limited, and the like.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:

an indoor unit of an air conditioner, comprising:

the air conditioner comprises an outer shell, a fan and a fan, wherein an air inlet and an air outlet are formed in the outer shell;

the driving assembly is positioned in the installation inner cavity and comprises a driving part and an output shaft connected with the output end of the driving part;

the fan assembly is connected with the output shaft and comprises a rotating part, a fixed frame body and a plurality of air guide parts, the air guide parts are dispersedly formed between the fixed frame body and the rotating part along the circumferential direction of the fixed frame body, each air guide part comprises an air guide top end and an air guide root end, an air guide channel is formed between every two adjacent air guide parts, and the cross-sectional dimension of each air guide channel is gradually reduced from the air guide top end to the air guide root end.

In some embodiments of the present disclosure, the cross section of the wind guide portion is a circular arc, and the wind guide portion includes a pressure surface and a suction surface, and the pressure surfaces of the adjacent wind guide portions are parallel to each other.

In some embodiments of the present application, the diameter of an inscribed circle of the wind guide channel between adjacent wind guide portions is gradually reduced from the wind guide tip end to the wind guide root end.

In some embodiments of the present application, the fan assembly further includes a volute mounted on an outer side of the fixed frame, on which an output port is formed.

In some embodiments of the present application, the rotating portion is connected to the output shaft of the driving portion, and the output shaft and the rotating portion are fixed by a bushing.

In some embodiments of the present application, the material of the bushing is a metal material.

In some embodiments of the present application, a buffer portion is formed between the boss and the rotating portion.

In some embodiments of the present application, the material of the cushioning portion is rubber.

In some embodiments of the present application, two sides of the rotating portion are respectively and symmetrically provided with a fixed frame and a plurality of wind guide portions.

In some embodiments of the present application, further comprising a heat exchanger mounted in the mounting cavity.

Compared with the prior art, the utility model has the advantages and positive effects that:

the air guide passage formed in the fan unit installed in the air conditioning indoor unit according to this application is gradually reduced along the direction of air flow, so that the air flow is accelerated in the air guide passage, the speed of the air flow flowing out of the fan unit is increased, and the air flow rate is increased.

Other features and advantages of the present invention will become more apparent from the following detailed description of the utility model when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of an indoor unit of an air conditioner according to the present invention;

FIG. 2 is a schematic view of a fan assembly;

FIG. 3 is a schematic view of the structure of the air guiding portion and the air guiding passage

FIG. 4 is a schematic view of the wind guiding part;

FIG. 5 is a schematic view of a wind guide channel;

in the figure, the position of the upper end of the main shaft,

100. an outer housing;

110. installing an inner cavity;

200. a drive assembly;

210. a drive section;

220. an output shaft;

300. a fan assembly;

310. a rotating part;

311. a shaft sleeve;

312. a buffer section;

320. fixing the frame body;

330. a wind guide part;

331. a pressure surface;

332. a suction surface;

333. a wind guide top end;

334. a wind guide root end;

341. an air guide inner circle;

342. an air guide outer circle;

340. an air guide channel;

400. a volute.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically coupled, may be directly coupled, or may be indirectly coupled through an intermediary. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

The air conditioner performs a cooling and heating cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The cooling and heating cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies a refrigerant medium to the air that has been conditioned and heat-exchanged.

The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigerating effect by heat exchange with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor, an outdoor heat exchanger, and an outdoor fan, the indoor unit of the air conditioner includes a portion of an indoor heat exchanger and an indoor fan, and a throttling device (e.g., a capillary tube or an electronic expansion valve) may be provided in the indoor unit or the outdoor unit.

The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. The air conditioner performs a heating mode when the indoor heat exchanger serves as a condenser, and performs a cooling mode when the indoor heat exchanger serves as an evaporator.

The indoor heat exchanger and the outdoor heat exchanger are switched to be used as a condenser or an evaporator, a four-way valve is generally adopted, and specific reference is made to the arrangement of a conventional air conditioner, which is not described herein again.

The refrigeration working principle of the air conditioner is as follows: the compressor works to enable the interior of the indoor heat exchanger (in the indoor unit, the evaporator at the moment) to be in an ultralow pressure state, liquid refrigerant in the indoor heat exchanger is rapidly evaporated to absorb heat, air blown out by the indoor fan is cooled by the coil pipe of the indoor heat exchanger to become cold air which is blown into a room, the evaporated and vaporized refrigerant is compressed by the compressor, is condensed into liquid in a high-pressure environment in the outdoor heat exchanger (in the outdoor unit, the condenser at the moment) to release heat, and the heat is dissipated into the atmosphere through the outdoor fan, so that the refrigeration effect is achieved by circulation.

The heating working principle of the air conditioner is as follows: the gaseous refrigerant is pressurized by the compressor to become high-temperature and high-pressure gas, and the high-temperature and high-pressure gas enters the indoor heat exchanger (the condenser at the moment), is condensed, liquefied and released heat to become liquid, and simultaneously heats indoor air, so that the aim of increasing the indoor temperature is fulfilled. The liquid refrigerant is decompressed by the throttling device, enters the outdoor heat exchanger (an evaporator at the moment), is evaporated, gasified and absorbs heat to form gas, absorbs the heat of outdoor air (the outdoor air becomes cooler) to form gaseous refrigerant, and enters the compressor again to start the next cycle.

As shown in fig. 1-2, an indoor unit of an air conditioner includes an outer casing 100, a heat exchanger, a driving assembly 200, and a fan assembly 300, wherein an installation cavity 110 is formed in the outer casing 100, and the heat exchanger, the driving assembly 200, and the fan assembly 300 are all installed in the installation cavity 110.

An air inlet and an air outlet (not shown) are formed on the outer shell 100, the driving assembly 200 drives the fan assembly 300 to move and work, so that indoor air is driven to enter the outer shell 100 from the air inlet, and is output from the air outlet of the outer shell 100 through the heat exchange effect of the heat exchanger, and the working performance of the fan assembly 300 directly influences the air inlet and outlet circulation efficiency.

The driving assembly 200 includes a driving portion 210 and an output shaft 220 connected to an output end of the driving portion 210, the driving portion 210 is a driving motor, and after the driving motor is turned on, the driving portion drives the output shaft 220 to rotate, so as to drive the fan assembly 300 connected to the output shaft 220 to rotate.

The fan assembly 300 includes a rotating portion 310, a fixed frame 320 and a plurality of air guiding portions 330, wherein the rotating portion 310 is formed with a connecting hole for connecting and fixing with the output shaft 220, so as to realize the synchronous rotation of the output shaft 220 and the fan assembly 300.

The fixed frame 320 is used for supporting the fixed air guiding parts 330, the fixed frame 320 is a circular frame structure, the air guiding parts 330 are dispersedly formed between the fixed frame 320 and the rotating part 310 along the circumferential direction of the fixed frame 320, an air guiding channel 340 is formed between the air guiding parts 330, and in the rotating process of the fan assembly 300, air flow is input from the middle of the fan assembly 300, passes through the air guiding channel 340, and is output from the periphery.

As shown in fig. 3 to 5, specifically, the air guiding portion 330 includes an air guiding tip 333 and an air guiding root end 334, the air guiding root end 334 is one end connected to the fixed frame 320, the air guiding tip 333 is one end away from the fixed frame 320, and during air flow conveyance, the air flow is first conveyed to the air guiding root end 334 through the air guiding tip 333.

An air guide channel 340 is formed between two adjacent air guide parts 330 and used for conveying air flow, and the cross-sectional dimension of the air guide channel 340 is gradually reduced from the air guide top end 333 to the air guide root end 334.

The two sides contacting with the air guiding channel 340 are respectively a pressure surface 331 and a suction surface 332 of two adjacent air guiding portions 330, one side applying pressure to the air flow is defined as the pressure surface 331 and the other side is defined as the suction surface 332 in the rotation process of the fan assembly 300, and the cross section of the air guiding portion 330 parallel to the fixed frame 320 is arc-shaped.

In the rotation process of the fan, the pressure surface 331 does work, and in order to ensure the working capacity of the fan, the molded line of the suction surface 332 is changed on the premise of not changing the molded line of the pressure surface 331, so that the air guide channel 340 is ensured to be a full-acceleration flow channel.

The specific suction surface 332 is designed as follows: the circumference size formed by a plurality of wind guide root ends 334 is defined as a wind guide outer circle 342, the circumference size formed by a wind guide top end 333 is defined as a wind guide inner circle 341, on the basis of a suction surface 332 of one wind guide part 330, four circles with the radiuses of R1, R2, R3 and R4 are respectively arranged at 1/3 of the distance difference between the wind guide root end 334, the wind guide outer circle 342 and the wind guide inner circle 341 on the end surface of the suction surface 332 and at four positions of the wind guide top end 333, the two sides of the circle are respectively tangent to a pressure surface 331 and the suction surface 332 of the adjacent wind guide part 330, the radiuses of the four circles ensure the distance between the normal line of the suction surface 332 and the pressure surface 331 of the next blade, and R5634 < R3< R4, so that the wind guide channel 340 is gradually reduced from the top end to the wind guide root end 334.

For convenience of installation and positioning, the flowing directions of the air flows in the air guide channels 340 are consistent, disturbance of the air flows is avoided, the pressure surfaces 331 of the adjacent air guide parts 330 are parallel to each other, the interval between the air guide channels 340 is determined by the shapes of the pressure surfaces 331, and when the size of the pressure surfaces 331 is defined, the size of an inscribed circle between the air guide channels 340 from the air guide top end 333 to the air guide root end 334 is ensured to be gradually reduced.

The fan assembly 300 further includes a volute 400, two ends of the volute 400 are open to facilitate airflow input, the volute 400 is sleeved outside the fixed frame 320, and an output port is formed on a side surface of the volute 400 for outputting airflow.

The rotating portion 310 of the fan assembly 300 is fixed with the output shaft 220 through the shaft sleeve 311, the shaft sleeve 311 is made of metal, the buffer portion 312 is further arranged between the shaft sleeve 311 and the rotating portion 310, the buffer portion 312 is made of rubber, the whole buffer portion 312 is annular, the buffer portion 312, the metal shaft sleeve 311 and the multi-wing centrifugal fan are fixed together through an adhesive, and the main effect of the buffer portion 312 is that the multi-wing centrifugal fan blades in the technical scheme are unequal-thickness blades, the weight of the whole fan is increased by about 40% compared with that in the prior art, and unbalance generated by rotation of the fan assembly 300 excites the output shaft 220 in a high static pressure and high rotation speed state, so that the driving portion 210 vibrates and radiates low-frequency sound.

In other embodiments of the present application, in order to improve the circulation rate of air, a set of fan assemblies 300 are respectively disposed on two sides of the driving assembly 200, two output shafts 220 are respectively disposed on two sides of the driving portion 210, the two output shafts 220 rotate synchronously, and then the fan assemblies 300 located on two sides of the driving portion 210 can be driven to move together, the two sets of fan assemblies 300 can improve the air inlet and outlet efficiency, under the driving of the same driving portion 210, a double air inlet and outlet effect is achieved, and in the process of air flow circulation in the air guide channel 340, due to the tapered structure of the size of the air guide channel 340, the flow rate of air flow is increased, the circulation rate is improved, and the flow effect of air is further improved.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention, and therefore, the scope of the present invention shall be subject to the claims.

Claims (10)

1. An indoor unit of an air conditioner, comprising:

the air conditioner comprises an outer shell, a fan and a fan, wherein an air inlet and an air outlet are formed in the outer shell;

the driving assembly is positioned in the installation inner cavity and comprises a driving part and an output shaft connected with the output end of the driving part;

the fan assembly is connected with the output shaft and comprises a rotating part, a fixed frame body and a plurality of air guide parts, the air guide parts are dispersedly formed between the fixed frame body and the rotating part along the circumferential direction of the fixed frame body, each air guide part comprises an air guide top end and an air guide root end, an air guide channel is formed between every two adjacent air guide parts, and the cross-sectional dimension of each air guide channel is gradually reduced from the air guide top end to the air guide root end.

2. An indoor unit of an air conditioner according to claim 1,

the cross section of the air guide part is arc-shaped and comprises a pressure surface and a suction surface, and the pressure surfaces of the adjacent air guide parts are parallel to each other.

3. An indoor unit of an air conditioner according to claim 1,

the diameter of an inscribed circle of the air guide channel between the adjacent air guide parts is gradually reduced from the air guide top end to the air guide root end.

4. An indoor unit of an air conditioner according to claim 1,

the fan assembly further comprises a volute, the volute is mounted on the outer side of the fixed frame body, and an output port is formed in the volute.

5. An indoor unit of an air conditioner according to claim 1,

the rotating part is connected with the output shaft of the driving part, and the output shaft and the rotating part are fixedly connected through a shaft sleeve.

6. An indoor unit of an air conditioner according to claim 5,

the shaft sleeve is made of a metal material.

7. An indoor unit of an air conditioner according to claim 5,

a buffer part is formed between the shaft sleeve and the rotating part.

8. An indoor unit of an air conditioner according to claim 7,

the buffer part is made of rubber.

9. An indoor unit of an air conditioner according to claim 1,

the two sides of the rotating part are respectively and symmetrically provided with a fixed frame body and a plurality of air guide parts.

10. An indoor unit of an air conditioner according to claim 1,

still include the heat exchanger, the heat exchanger is installed in the installation inner chamber.

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