Fan, duct internal unit and air conditioner

Abstract

The present invention relates to the technical field of air conditioning, and specifically to a fan, an air duct unit and an air conditioner, wherein the fan comprises a mounting plate connected to the air duct unit, a first air outlet duct and a second air outlet duct symmetrically arranged on the mounting plate, and an air supply assembly arranged on the mounting plate; the air supply assembly is arranged between the first air outlet duct and the second air outlet duct; the air supply assembly comprises a driving member arranged on the mounting plate, a first axial flow fan blade connected to the driving member, and a second axial flow fan blade connected to the driving member. The present invention delivers air through the axial flow fan blades of the air supply assembly. Compared with traditional centrifugal fan blades, the air outlet is stable and the noise is small. At the same time, the structure of the two air outlet ducts is arranged according to the principle of static pressure balance. The air outlet volume is much larger than the air intake volume delivered by the air supply assembly. The motor speed is greatly reduced compared with traditional fans, thereby reducing power consumption. In addition, the fan of the present invention has a simple structure, which reduces the difficulty of assembly, improves assembly efficiency, and reduces production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a fan, a duct internal unit and an air conditioner. Background Art

[0002] As the core part of the central air conditioning system, the duct indoor unit is widely used in office buildings, commercial plazas, real estate and other fields due to its simple structure, convenient installation and high cost performance. The traditional duct indoor unit is mainly composed of evaporator, fan mounting plate, fan, side panel, etc. The evaporator is the key component of the air conditioner. During cooling, the low-temperature and low-pressure refrigerant liquid in the evaporator pipeline absorbs the heat in the gas, thereby reducing the indoor ambient temperature. The flow of gas in the indoor environment is slow. During the cooling process, the speed of gas flow needs to be accelerated to improve the efficiency of heat exchange. The fan is the key component to accelerate the flow of gas. The fan plays the role of suction, wind guidance, and wind speed adjustment in the duct indoor unit. The traditional fan is mainly composed of centrifugal fan blades, motor shaft, motor, fan mounting plate, motor bracket, clamp, bearing rubber seat, volute, sponge, etc. The motor is fixed in the fan mounting plate through the motor bracket and clamp. The centrifugal fan blades and the motor shaft are connected to the fan mounting plate through the bearing rubber seat. When working, the motor rotates and drives the centrifugal fan blades to rotate through the motor shaft, thereby changing the gas flow direction and speed, and discharging the gas to the evaporator side for heat exchange. The traditional fan has a complex structure and is difficult to assemble. There is a tendency for deviation between the freely rotating object and the motor shaft. The centrifugal fan blade is large in size, and the dynamic balance between the motor shaft and the fan blade is prone to failure, causing the fan to vibrate, making the air output unstable. When the dynamic balance between the motor shaft and the fan blade fails, it will cause the fan to shake and easily produce abnormal noise. On the other hand, the air output of the traditional fan structure depends on the motor speed. In order to obtain a large air output, the motor speed needs to be increased, which consumes a lot of power. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a fan, and an in-duct unit including the fan, and an air conditioner including the in-duct unit.

[0004] The present invention is implemented by the following scheme:

[0005] A fan is arranged inside an air duct unit of an air conditioner, the fan comprising: a mounting plate connected to the air duct unit, a first air outlet duct and a second air outlet duct symmetrically arranged on the mounting plate, an air supply assembly arranged on the mounting plate for supplying air to the first air outlet duct and the second air outlet duct; the air supply assembly is arranged between the first air outlet duct and the second air outlet duct; the air supply assembly comprises a driving member arranged on the mounting plate, a first axial flow fan blade connected to the driving member for supplying air to the first air outlet duct, and a second axial flow fan blade connected to the driving member for supplying air to the second air outlet duct.

[0006] Furthermore, the first air outlet duct and the second air outlet duct both include an inner duct member, an outer duct member mounted on the inner duct member, and an air inlet frame arranged on the side wall of the outer duct member, and a space for gas circulation is formed between the inner duct member and the outer duct member; the air inlet frame of the first air outlet duct and the air inlet frame of the second air outlet duct are detachably connected; the air inlet frame of the first air outlet duct and the air inlet frame of the second air outlet duct together form a space for accommodating the air supply assembly, the first axial flow fan blade is located in the air inlet frame of the first air outlet duct, and the second axial flow fan blade is located in the air inlet frame of the second air outlet duct.

[0007] Furthermore, the upper end of the inner ring channel member is bent toward the outer ring channel member and forms an air inlet for gas circulation with the outer ring channel member, the upper end of the outer ring channel member is bent downward and wraps the upper end of the inner ring channel member inside, and an air outlet is formed between the upper end of the outer ring channel member and the inner ring channel member, and the area of ​​the air outlet is smaller than the area of ​​the air inlet; a plurality of connecting parts for connecting to the outer ring channel member are provided near the upper end of the inner ring channel member.

[0008] Furthermore, the air inlet frame is provided with a plurality of air holes for gas circulation, and an opening for a driving member to pass through is also provided on the lower side of the air inlet frame.

[0009] Furthermore, the first air outlet duct and the second air outlet duct are both connected to the mounting plate via a connecting assembly, and the connecting assembly includes an annular clamping ring connected to the outer ring duct member, a fixing ring for connecting the annular clamping ring and the mounting plate, and a sealing rubber ring arranged between the annular clamping ring and the fixing ring.

[0010] Furthermore, the air inlet frame of the first air outlet duct and the air inlet frame of the second air outlet duct are connected via a snap-fit ​​assembly.

[0011] Furthermore, the mounting plate is provided with air ports for gas circulation at positions corresponding to the first air outlet duct and the second air outlet duct.

[0012] Furthermore, the driving member is fixedly connected to the mounting plate via a fixing bracket, and the driving member is fixed to the fixing bracket via a clamp; the driving member is a double-headed shaft motor, and both ends of the main shaft of the double-headed shaft motor are respectively facing the first air outlet duct and the second air outlet duct.

[0013] A duct internal unit comprises the aforementioned fan.

[0014] An air conditioner comprises the aforementioned duct indoor unit.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention symmetrically arranges the first air outlet duct and the second air outlet duct on the mounting plate, and supplies air through the axial flow fan blades of the air supply assembly. Compared with the traditional centrifugal fan blades, the air outlet is stable and the noise is small. At the same time, the structure of the two air outlet ducts is arranged according to the static pressure balance principle, and the air outlet volume is much larger than the air intake volume delivered by the air supply assembly. Under the condition of the same air volume demand, the motor speed is greatly reduced compared with the traditional fan, thereby greatly reducing the power consumption. On the other hand, the structure of the fan of the present invention is simpler than that of the traditional fan, with fewer components, which reduces the difficulty of assembly, improves the assembly efficiency, and reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 An exploded diagram of a fan provided by the present invention.

[0018] Figure 2 It is a schematic structural diagram of the first air outlet duct of the present invention.

[0019] Figure 3 It is a cross-sectional view of the first air outlet duct of the present invention.

[0020] Figure 4 It is the fan assembly diagram of the present invention.

[0021] Figure 5 It is a schematic diagram of the connection between the fan and the unit in the air duct of the present invention.

[0022] Included in the picture are:

[0023] Mounting plate 1, air port 11, first air outlet duct 2, inner duct member 21, outer duct member 22, air inlet frame 23, air inlet 24, air outlet 25, connecting member 26, air hole 27, opening 28, second air outlet duct 3, air supply assembly 4, driving member 41, first axial flow fan blade 42, second axial flow fan blade 43, fixing bracket 44, clamp 45, connecting assembly 5, annular clamp ring 51, fixing ring 52, sealing rubber ring 53, buckle assembly 6, duct inner machine casing 7, evaporator 71. DETAILED DESCRIPTION

[0024] To facilitate those skilled in the art to understand the present invention, the present invention will be further described in detail below in conjunction with specific embodiments and drawings.

[0025] Reference Figures 1 to 5A fan provided by the present invention is arranged inside an air duct unit of an air conditioner, and the fan comprises: a mounting plate 1 connected to the air duct unit, a first air outlet duct 2 and a second air outlet duct 3 symmetrically arranged on the mounting plate 1, and an air supply component 4 arranged on the mounting plate 1 for supplying air to the first air outlet duct 2 and the second air outlet duct 3; the air supply component 4 is arranged between the first air outlet duct 2 and the second air outlet duct 3; the air supply component 4 comprises a driving member 41 arranged on the mounting plate 1, a first axial flow fan blade 42 connected to the driving member 41 for supplying air to the first air outlet duct 2, and a second axial flow fan blade 43 connected to the driving member 41 for supplying air to the second air outlet duct 3. The two air outlet ducts of the fan are fixed, and only the driving member 41 is used to drive the two axial flow blades to rotate. Compared with the traditional fan that uses large centrifugal blades to rotate and discharge air, the air outlet of the fan of the present invention is stable and the noise is small. At the same time, the structural design of the fan of the present invention can also eliminate the volute and sponge used for air diversion in the traditional fan components, so that the component structure of the fan is relatively simple, involving less materials, saving costs and assembly time.

[0026] The driving member 41 is fixedly connected to the mounting plate 1 through a fixing bracket 44, and the driving member 41 is fixed to the fixing bracket 44 through a clamp 45. In this embodiment, the driving member 41 is a double-headed shaft motor, and the two ends of the main shaft of the double-headed shaft motor are respectively facing the first air outlet duct 2 and the second air outlet duct 3.

[0027] The first air outlet duct 2 and the second air outlet duct 3 both include an inner duct member 21, an outer duct member 22 sleeved on the inner duct member 21, and an air inlet frame 23 arranged on the side wall of the outer duct member 22, and a space for gas circulation is formed between the inner duct member 21 and the outer duct member 22; the air inlet frame 23 of the first air outlet duct 2 and the air inlet frame 23 of the second air outlet duct 3 are detachably connected; the air inlet frame of the first air outlet duct and the air inlet frame of the second air outlet duct together form a space for accommodating the air supply assembly 4, the first axial flow fan blade 42 is located in the air inlet frame 23 of the first air outlet duct 2, and the second axial flow fan blade 43 is located in the air inlet frame 23 of the second air outlet duct 3. The first axial flow fan blade 42 and the second axial flow fan blade 43 are respectively connected to the two ends of the main shaft of the double-headed shaft motor. In this embodiment, the inner ring channel member 21 and the outer ring channel member 22 are generally waist-shaped (i.e., similar to the shape of a standard track and field runway). In specific implementation, the shapes of the two are not limited to the shapes shown in this embodiment, and can be other geometric shapes such as circular or elliptical. In this embodiment, the air inlet frame 23 is generally tubular. In specific implementation, the outer ring channel member 22 and the air inlet frame 23 can be integrally formed. Traditional fans use centrifugal fan blades, which have many blades, require precise blade inclination angles, are difficult to injection mold, and have a high scrap rate. Compared with traditional fans, the air outlet duct of the present invention has no blades, can be quickly molded at one time, is simple to mold, and has a low scrap rate.

[0028] The upper end of the inner channel member 21 is bent toward the outer channel member 22 and forms an air inlet 24 for gas circulation between the outer channel member 22, the upper end of the outer channel member 22 is bent downward and wraps the upper end of the inner channel member 21 inside, and the upper end of the outer channel member 22 forms an air outlet and the inner channel member 21 forms an air outlet 25, and the area of ​​the air outlet 25 is smaller than the area of ​​the air inlet 24. The side of the outer channel member 22 facing the inner channel member 21 is defined as the inner wall of the outer channel member 22, and the upper end of the inner channel member 21 is bent toward the inner wall of the outer channel member 22. According to the principle of static pressure balance, the pressure is increased by designing the area ratio of the air inlet 24 and the air outlet 25, and the Coanda surface is used. The air blown out from the gap of the air outlet 25 is pressurized, the air outlet speed is increased, and the high-speed air blown out forms a low-pressure area. The air upstream and around the loop is supplemented under the pressure difference. The supplemented air is much larger than the air intake. After calculation using CFD numerical simulation software, under the same motor speed, the air flow will become 15 times the original air volume. After further calculation, under the condition of obtaining the same air volume, the motor speed required for the motor of the fan of the present invention is only 16% of that of the traditional fan components, and the power consumption is low.

[0029] A plurality of connectors 26 for connecting the outer ring member 22 are provided near the upper end of the inner ring member 21 . After the outer ring member 22 is sleeved onto the inner ring member 21 , the upper end of the outer ring member 22 bent downward is just connected to the connector 26 .

[0030] The air inlet frame 23 is provided with a plurality of air holes 27 for air circulation, and the air holes 27 may be evenly distributed along the outer wall of the air inlet frame 23 . An opening 28 for the driving member 41 to pass through is also provided at the lower side of the air inlet frame 23 .

[0031] The first air outlet duct 2 and the second air outlet duct 3 are both connected to the mounting plate 1 via a connecting assembly 5, wherein the connecting assembly 5 comprises an annular collar 51 connected to the outer annular duct member 22, and is used to connect the annular collar 51 and a fixing ring of the mounting plate 1.

[0032] , and a sealing rubber ring 53 arranged between the annular collar 51 and the fixing ring 52.

[0033] The air inlet frame 23 of the first air outlet duct 2 and the air inlet frame 23 of the second air outlet duct 3 are connected by a buckle assembly 6. A plurality of buckle assemblies 6 are provided. In specific implementation, a male buckle can be provided on the air inlet frame 23 of the first air outlet duct 2, and a male buckle can be provided on the air inlet frame 23 of the second air outlet duct 3, or vice versa.

[0034] The mounting plate 1 is provided with air ports 11 for gas circulation at positions corresponding to the first air outlet duct 2 and the second air outlet duct 3 , and the shapes of the air ports 11 correspond to the first air outlet duct 2 and the second air outlet duct 3 .

[0035] The present invention further provides an indoor unit in the duct, comprising the aforementioned fan, when the fan is installed in the indoor unit in the duct, the mounting plate 1 is connected to the indoor unit housing 7 of the duct, and the air outlet direction is toward the side of the evaporator 71.

[0036] The present invention also provides an air conditioner, comprising the aforementioned duct indoor unit.

[0037] The present invention symmetrically arranges the first air outlet duct and the second air outlet duct on the mounting plate, and supplies air through the axial flow fan blades of the air supply assembly. Compared with the traditional centrifugal fan blades, the air outlet is stable and the noise is small. At the same time, the structure of the two air outlet ducts is arranged according to the static pressure balance principle, and the air outlet volume is much larger than the air intake volume delivered by the air supply assembly. Under the condition of the same air volume demand, the motor speed is greatly reduced compared with the traditional fan, thereby greatly reducing the power consumption. On the other hand, the structure of the fan of the present invention is simpler than that of the traditional fan, with fewer components, which reduces the difficulty of assembly, improves the assembly efficiency, and reduces the production cost.

[0038] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Although the present invention is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes according to the above content. Therefore, all such substitutions, improvements and changes are included in the scope of the appended claims.

Claims

1. A fan, arranged inside an air duct of an air conditioner, characterized in that: The fan comprises: a mounting plate connected to an internal unit of the air duct, a first air outlet channel and a second air outlet channel symmetrically arranged on the mounting plate, an air supply assembly arranged on the mounting plate for supplying air to the first air outlet channel and the second air outlet channel, and air ports for gas circulation are arranged at positions of the mounting plate corresponding to the first air outlet channel and the second air outlet channel; the air supply assembly is arranged between the first air outlet channel and the second air outlet channel; the air supply assembly comprises a driving member arranged on the mounting plate, a first axial flow fan blade connected to the driving member for supplying air to the first air outlet channel, and a second axial flow fan blade connected to the driving member for supplying air to the second air outlet channel; The first air outlet duct and the second air outlet duct both include an inner duct member, an outer duct member mounted on the inner duct member, and an air inlet frame arranged on the side wall of the outer duct member, and a space for gas circulation is formed between the inner duct member and the outer duct member; the air inlet frame of the first air outlet duct and the air inlet frame of the second air outlet duct are detachably connected; the air inlet frame of the first air outlet duct and the air inlet frame of the second air outlet duct together form a space for accommodating the air supply assembly, the first axial flow fan blade is located in the air inlet frame of the first air outlet duct, and the second axial flow fan blade is located in the air inlet frame of the second air outlet duct.

2. The fan according to claim 1, characterized in that: The upper end of the inner ring channel member is bent toward the outer ring channel member and forms an air inlet for gas circulation with the outer ring channel member, the upper end of the outer ring channel member is bent downward and wraps the upper end of the inner ring channel member inside, and an air outlet is formed between the upper end of the outer ring channel member and the inner ring channel member, and the area of ​​the air outlet is smaller than the area of ​​the air inlet; a plurality of connectors for connecting to the outer ring channel member are arranged near the upper end of the inner ring channel member.

3. The fan according to claim 2, characterized in that: The air inlet frame is provided with a plurality of air holes for air circulation, and an opening for a driving member to pass through is also provided on the lower side of the air inlet frame.

4. The fan according to claim 2, characterized in that: The first air outlet duct and the second air outlet duct are both connected to the mounting plate via a connecting assembly, and the connecting assembly includes an annular clamping ring connected to the outer ring duct, a fixing ring for connecting the annular clamping ring and the mounting plate, and a sealing rubber ring arranged between the annular clamping ring and the fixing ring.

5. The fan according to claim 2, characterized in that: The air inlet frame of the first air outlet duct and the air inlet frame of the second air outlet duct are connected via a buckle assembly.

6. The fan according to claim 1, characterized in that: The driving member is fixedly connected to the mounting plate via a fixing bracket, and the driving member is fixed to the fixing bracket via a clamp; the driving member is a double-headed shaft motor, and both ends of the main shaft of the double-headed shaft motor are respectively facing the first air outlet duct and the second air outlet duct.

7. A duct internal unit, characterized in that: Including the fan described in any one of claims 1-6.

8. An air conditioner, characterized in that: Including the duct internal unit as described in claim 7.

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