WO2019001107A1

WO2019001107A1 - Cross-flow wind turbine and fan heater

Info

Publication number: WO2019001107A1
Application number: PCT/CN2018/083795
Authority: WO
Inventors: 王庆; 马列; 谭成波
Original assignee: 广东美的环境电器制造有限公司; 美的集团股份有限公司
Priority date: 2017-06-30
Filing date: 2018-04-19
Publication date: 2019-01-03
Also published as: CN206917925U; JP2020521912A; EP3633206B1; EP3633206A4; EP3633206A1; US20200158137A1

Abstract

A cross-flow wind turbine and a fan heater using the cross-flow wind turbine. The cross-flow wind turbine (31) comprises two fixed plates (311) provided opposite to each other and several blades (315) connected between the two fixed plates (311); the several blades (315) are spaced along the outer edges of the fixed plates (311), the blades (315) being arranged in a twisted manner along the axial direction of the cross-flow wind turbine (31), and the relative twist angle between two ends of each of the blades (315) is greater than or equal to 5° and less than or equal to 40°. The cross-flow wind turbine can reduce working noise of the fan heater.

Description

Cross flow wind turbine and heater

Technical field

The invention relates to the technical field of heaters, in particular to a cross flow wind wheel and a heater fan using the cross flow wind wheel.

Background technique

At present, as a new type of heating device, the heater is widely used because of its advantages of convenient use and simple operation. However, the noise of the existing heaters is generally higher, which affects the user's comfort.

Summary of the invention

The main object of the present invention is to provide a cross-flow wind wheel, which aims to reduce the operating noise of the heater and improve the user's comfort.

In order to achieve the above object, the cross-flow wind wheel of the present invention comprises two oppositely disposed fixing plates and a plurality of blades connected between the two fixing plates, and the plurality of blades are arranged along the outer edge of the fixing plate. The blade is twisted along the axial direction of the cross-flow wind wheel, and the relative twist angle of the two ends of the blade is greater than or equal to 5° and less than or equal to 40°.

Optionally, the blade is disposed obliquely between the two fixed plates along the axial direction of the cross-flow wind wheel, and the blade forms an angle θ with the fixed plate, 85°≤θ≤88°.

Optionally, the cross section of the blade is curved, and the chord length of the arc ranges from 6 mm to 8 mm.

Optionally, the thickness of the blade ranges from 0.3 mm to 0.5 mm.

Optionally, the outer diameter D of the cross flow wind wheel ranges from 30 mm to 100 mm, and/or the length of the cross flow wind wheel ranges from 150 mm to 600 mm.

Optionally, the number of blades of the cross flow wind wheel is 18 pieces to 25 pieces.

Optionally, the cross-sectional diameter of the cross-flow wind wheel ranges from 0.7 to 0.85.

Optionally, the cross flow wind wheel comprises a plurality of first blades and a plurality of second blades, a width of the first blades is greater than a width of the second blades, and a plurality of the first blades and a plurality of the second blades alternate Set; and/or,

The spacing between the blades is alternately set.

The present invention also provides a heater, the heater comprising a housing and a duct assembly disposed in the housing, the duct assembly including a volute and a cross-flow wind wheel, the cross-flow wind wheel comprising two opposite settings a fixing plate and a plurality of blades connected between the two fixing plates, a plurality of the blades are arranged along the outer edge of the fixing plate, and the blades are twisted along the axial direction of the cross flow wind wheel. The relative twist angles of the two ends of the blade are greater than or equal to 5° and less than or equal to 40°, and the cross-flow wind wheel is mounted on the volute.

Optionally, one end of the cross flow wind wheel is provided with a rotating shaft, and the volute is provided with a bearing sleeve, and the rotating shaft is received in the bearing sleeve.

Optionally, the cross-flow wind wheel is not provided with an end portion of the rotating shaft, and the air duct assembly further includes a motor mounted on the volute, the sleeve is sleeved on the motor Output shaft.

Optionally, the thickness of the blade ranges from 0.3 mm to 0.5 mm.

The spacing between the blades is alternately set.

According to the technical solution of the present invention, each of the blades of the cross-flow wind wheel is disposed as a blade that is twisted along the axial direction of the cross-flow wind wheel, and the relative twist angle of each of the two ends of the blade is greater than or equal to 5° and less than or equal to 40°. Therefore, when the cross-flow wind wheel is in operation, each part on the same blade can pass through a minimum gap between the cross-flow wind wheel and the volute at different times, so that the types and frequencies of noise generated in each part of the same blade are diversified. The cross-flow wind turbine operates with more types of noise and a wider frequency range, thereby avoiding resonance peaks caused by superposition of noise of the same kind and frequency, that is, avoiding frequency concentration of noise, reducing noise intensity, and thereby reducing The working noise of the heater increases the user's comfort.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and those skilled in the art can obtain other drawings according to the structures shown in the drawings without any creative work.

1 is an exploded view of an embodiment of a heater of the present invention;

Figure 2 is an exploded view of the air duct assembly of Figure 1;

Figure 3 is a schematic enlarged view of the portion III in Figure 2;

Figure 4 is a plan view of the cross flow wind wheel of Figure 2;

Figure 5 is a schematic enlarged view of the structure at V in Figure 2;

Figure 6 is a top plan view of another embodiment of a cross flow wind wheel of the present invention.

Description of the reference numerals:

标号Label	名称name	标号Label	名称name
100100	暖风机heater	315b315b	第二叶片Second blade
1010	底座Base	3333	蜗壳Volute
3030	风道组件Air duct component	331331	轴承套Bearing sleeve
3131	贯流风轮Cross flow wind wheel	3535	电机Motor
311311	固定板Fixed plate	351351	输出轴Output shaft
31113111	转轴Rotating shaft	5050	壳体case
31133113	轴套Bushing	5151	前壳Front shell
315315	叶片blade	5353	后壳Back shell
315a315a	第一叶片First blade

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back, ...) in the embodiments of the present invention are only used to explain between components in a certain posture (as shown in the drawing). Relative positional relationship, motion situation, etc., if the specific posture changes, the directional indication also changes accordingly.

In addition, the descriptions of "first", "second", and the like in the present invention are used for the purpose of description only, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "connected", "fixed" and the like should be understood broadly, unless otherwise clearly defined and limited. For example, "fixed" may be a fixed connection, or may be a detachable connection, or may be integrated; It may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship of two elements unless explicitly defined otherwise. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In addition, the technical solutions between the various embodiments of the present invention may be combined with each other, but must be based on the realization of those skilled in the art, and the combination of technical solutions should be considered when the combination of technical solutions is contradictory or impossible to implement. It does not exist and is not within the scope of protection required by the present invention.

The present invention proposes a cross flow wind wheel 31.

As shown in FIG. 1 and FIG. 2, the cross flow wind wheel 31 of the present invention is applied to a heater 100, and the heater 100 includes:

Base 10;

a housing 50, the housing 50 is disposed on the base 10;

Specifically, the housing 50 includes a front housing 51 and a rear housing 53 connected to the front housing 51. The front housing 51 and the rear housing 53 are enclosed to form a receiving cavity (not shown) for accommodating the air duct assembly of the heater 100. 30. Heating components (not shown), etc. The front casing 51 is provided with an air outlet (not shown), and the rear casing 53 is provided with an air inlet (not shown). The airflow enters the receiving cavity in the casing 50 from the air inlet of the rear casing 53, and then accelerates through the air duct assembly 30 in sequence. The heating unit is heated and finally blown out by the air outlet of the front case 51.

The air duct assembly 30 of the air heater 100 includes a volute 33 and a cross flow wind wheel 31 provided in the volute 33.

Specifically, as shown in FIG. 2, FIG. 3, and FIG. 5, in an embodiment of the cross flow wind wheel 31 of the present invention, the cross flow wind wheel 31 includes two opposite fixed plates 311 and two fixed plates. a plurality of blades 315 between 311, a plurality of the blades 315 are arranged along the outer edge of the fixed plate 311, and the blades 315 are twisted along the axial direction of the cross flow wind wheel 31, at both ends of the blade 315 The relative twist angle is greater than or equal to 5° and less than or equal to 40°.

The horizontal placement of the heater 100 is now introduced as an example.

In this embodiment, each of the fixing plates 311 has a circular shape and extends in a horizontal direction. The two fixing plates 311 are arranged in a vertical direction, and the plate surfaces are arranged in parallel. Two ends of each of the blades 315 are respectively fixed to the two fixing plates 311, and the ends of each of the blades 315 are located at the outer edge of the fixing plate 311. Thus, the cross flow wind wheel 31 is substantially cylindrical and its axis extends in a vertical direction. Moreover, a plurality of reinforcing plates (not labeled) disposed parallel to each other and spaced apart from each other are disposed between the two fixing plates 311, and each of the blades 315 passes through the plurality of reinforcing plates to function to strengthen the structural strength of the cross-flow wind wheel 31.

Specifically, as shown in FIG. 2, each time a certain distance is raised along the axial direction of the cross flow wind wheel 31, the blade 315 is twisted at a certain angle along the circumferential direction of the cross flow wind wheel 31, and is gradually twisted from the lower end to the upper end, eventually making each The relative twist angles of the upper and lower ends of the blade 315 (ie, the two ends of the two fixing plates 311, respectively) are greater than or equal to 5° and less than or equal to 40° (ie, between 5° and 40°). In this way, when the cross flow wind wheel 31 is in operation, each part on the same blade 315 can pass through the minimum gap between the cross flow wind wheel 31 and the volute 33 at different times, so that noise generated in each part of the same blade 315 is generated. The variety and frequency are diverse.

Therefore, it can be understood that the technical solution of the present invention is to provide each blade 315 of the cross flow wind wheel 31 as a blade 315 which is twisted along the axial direction of the cross flow wind wheel 31, and to make the opposite ends of each blade 315 The torsion angle is greater than or equal to 5° and less than or equal to 40°, so that when the cross flow wind wheel 31 is in operation, each part on the same blade 315 can pass through a minimum gap between the cross flow wind wheel 31 and the volute 33 at different times, so that The types and frequencies of noise generated in various parts of the same blade 315 are diversified, so that the cross-flow wind wheel 31 operates with more types of noise and a wider frequency range, thereby avoiding resonance peaks caused by superposition of noise of the same kind and frequency. That is, the frequency concentration of the noise is avoided, the noise intensity is reduced, the working noise of the heater 100 is reduced, and the user's use comfort is improved.

As shown in FIG. 3, the blade 315 is disposed between the two fixing plates 311 obliquely along the axial direction of the cross flow wind wheel 31, and an angle θ, 85 is formed between the blade 315 and the fixing plate 311. °≤θ≤88°.

Specifically, each of the blades 315 has an elongated shape, and each of the blades 315 is a diagonal blade 315 or a spiral blade 315 which is disposed obliquely along the axial direction of the cross flow wind wheel 31 (ie, the vertical direction, that is, the up and down direction), that is, The extending direction of each of the blades 315 is not parallel to the axial direction of the cross-flow wind wheel 31, and the angle between each of the blades 315 and the fixed plate 311 is θ, and 85° ≤ θ ≤ 88°. Thus, in comparison with the vertical blades (i.e., the blades 315 disposed perpendicularly to the fixed plate 311), on the one hand, it is further ensured that the respective portions on the same blade 315 can pass between the cross flow wind wheel 31 and the volute 33 at different times. The minimum gap, thereby further avoiding the generation and superposition of noise of the same kind and frequency, avoiding the frequency concentration of the noise and reducing the noise intensity; on the other hand, such an arrangement can also make the blades of the cross-flow wind wheel 31 in the circumferential direction The 315 can pass through the minimum gap between the cross-flow wind wheel 31 and the volute 33 at different time intervals, avoiding the noise of the same kind and frequency generated by the respective blades 315, thereby avoiding the noise of the same kind and frequency generated by the respective blades 315. Superposition, further reducing the noise intensity.

As shown in FIG. 4, the blade 315 has an arc shape in cross section, and the arc has a chord length ranging from 6 mm to 8 mm.

Specifically, the cross section of the blade 315 in the axial plane direction of the vertical cross flow wind wheel 31 is substantially curved, and the chord length of the arc is 6 mm to 8 mm.

The thickness of the blade 315 ranges from 0.3 mm to 0.5 mm.

The outer diameter D of the cross flow wind wheel 31 ranges from 30 mm to 100 mm, and/or the length of the cross flow wind wheel ranges from 150 mm to 600 mm.

The range of the wheel diameter ratio d/D of the cross flow wind wheel 31 is 0.7 to 0.85.

Specifically, referring to FIG. 4, the side of each blade 315 close to the axial center of the cross flow wind wheel 31 is substantially on the same circumference, and the ratio d/D of the diameter d of the circumference to the outer diameter D of the cross flow wind wheel 31 is in the range of d/D. It is 0.7~0.85.

Through the setting of the above parameters, the air volume of the cross-flow wind wheel 31 can be effectively improved, and at the same time, the cross-flow wind wheel 31 has less consumables and light weight, thereby effectively reducing the load of the driving motor 35 under a certain air volume, thereby achieving a certain air volume to reduce the warming. Fan 100 noise purpose.

As shown in FIG. 4, the number of the blades 315 of the cross flow wind wheel 31 is 18 pieces to 25 pieces. In this way, the air inlet and the wind sweep of the blade 315 can be further facilitated, so that the cross flow wind wheel 31 can generate a larger air volume, thereby reducing the load of the motor 35 under a certain air volume condition, thereby reducing the noise of the heater 100. .

As shown in FIG. 6, in another embodiment of the cross flow wind wheel 31 of the present invention, the cross flow wind wheel 31 includes a plurality of first blades 315a and a plurality of second blades 315b, the first blades 315a having a width greater than the first The width of the two blades 315b, a plurality of the first blades 315a and a plurality of the second blades 315b are alternately disposed.

Specifically, the chord length of the first blade 315a is set to 7.4 mm, the wheel diameter ratio thereof is set to 0.79; the chord length of the second blade 315b is set to 7.0 mm, and the wheel diameter ratio is set to 0.78.

In this way, the large and small blades are alternately arranged, not only can maintain a high air volume, but also can use the large and small blades to alternately sweep the wind, effectively disperse the noise frequency generated by the blade 315 sweeping wind, and reduce the howling noise generated by the excessive noise in the same frequency band, thereby The noise of the heater 100 is effectively reduced.

Further, in still another embodiment of the cross flow wind wheel 31 of the present invention, the pitch between the blades 315 is alternately set. Specifically, the blades 315 can be alternately arranged at intervals of 5.0 mm and 5.3 mm. In this way, the noise intensity can also be dispersed to achieve the purpose of noise reduction.

The present invention also provides a heater 100 comprising a housing 50 and a duct assembly 30 disposed within the housing 50, the duct assembly 30 including a volute 33 and as previously described The cross flow wind wheel 31. Since all the technical solutions of all the foregoing embodiments are adopted in the present air heater 100, at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments are not repeatedly described herein. The cross flow wind wheel 31 is mounted on the volute 33.

As shown in FIG. 2 and FIG. 5, one end of the cross-flow wind wheel 31 is provided with a rotating shaft 3111. The volute 33 is provided with a bearing sleeve 331, and the rotating shaft 3111 is received in the bearing sleeve 331.

In this embodiment, a rotating shaft 3111 is fixed on the fixing plate 311 of the upper end of the cross-flow wind wheel 31. The rotating shaft 3111 is protruded from the surface of the fixing plate 311 facing the volute 33. Accordingly, the volute 33 faces the rotating shaft 3111. A bearing sleeve 331 is fixed at the fixed position, and a bearing is fixed in the bearing sleeve 331. The rotating shaft 3111 is received in the bearing sleeve 331 and inserted into the inner ring of the bearing. Specifically, the bearing sleeve 331 may be a rubber bearing sleeve.

In this way, the vibration during the rotation of the cross-flow wind wheel 31 can be effectively reduced, so that the rotation of the cross-flow wind wheel 31 is more stable, so that the structure of the heater 100 is more stable, and at the same time, the vibration is reduced, the structure is stabilized, and the heater can be effectively reduced. 100 noise.

As shown in FIG. 2 and FIG. 3, the end of the rotating wind wheel 31 not provided with the rotating shaft 3111 is provided with a sleeve 3113, and the air duct assembly 30 further includes a motor 35 mounted on the volute 33. The sleeve 3113 is sleeved on the output shaft 351 of the motor 35.

In the present embodiment, the fixing plate 311 of the cross-flow wind wheel 31 that is not provided with one end of the rotating shaft 3111 is fixed with a sleeve 3113 which is sleeved and held by the output shaft 351 of the motor 35. Thus, the motor 35 rotates, the output shaft 351 of the motor 35 drives the sleeve 3113 to rotate, and the sleeve 3113 is fixed to the plate fixed plate to drive the cross-flow wind wheel 31 to rotate. At this time, the rotating shaft 3111 at the other end rotates in the bearing sleeve 331. . Specifically, the sleeve 3113 can be sleeved with a silicone sleeve and connected to the output shaft 351 of the motor 35 by an interference fit, without screws, and the assembly is simple and convenient. At the same time, the reduction of the parts reduces the vibration between the components on the one hand, and reduces the load of the motor 35 on the other hand, thereby effectively reducing the noise of the heater 100.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structural transformation, or direct/indirect use, of the present invention and the contents of the drawings are used in the inventive concept of the present invention. It is included in the scope of the patent protection of the present invention in other related technical fields.

Claims

A cross flow wind wheel is applied to a heater fan, the cross flow wind wheel includes two opposite fixed plates and a plurality of blades connected between the two fixed plates, and the plurality of blades are spaced along an outer edge of the fixed plate The arrangement is characterized in that the blades are twisted along the axial direction of the cross-flow wind wheel, and the relative twist angles of the two ends of the blades are greater than or equal to 5° and less than or equal to 40°.
The cross-flow wind wheel according to claim 1, wherein the vane is obliquely disposed between the two fixed plates along an axial direction of the cross-flow wind turbine, and the vane and the fixed plate form a clip. Angle θ, 85° ≤ θ ≤ 88°.
The cross-flow wind wheel according to claim 1, wherein said blade has an arc shape in cross section, and said arc has a chord length ranging from 6 mm to 8 mm.
The cross-flow wind wheel according to claim 3, wherein the cross-sectional wind wheel has a wheel diameter ratio d/D ranging from 0.7 to 0.85.
The cross-flow wind wheel of claim 1 wherein said blade has a thickness in the range of 0.3 mm to 0.5 mm.
The cross-flow wind wheel according to claim 1, wherein the outer diameter D of the cross flow wind wheel ranges from 30 mm to 100 mm, and/or the length of the cross flow wind wheel ranges from 150 mm to 600 mm.
The cross-flow wind wheel according to claim 1, wherein the number of blades of the cross flow wind wheel is 18 to 25 pieces.
The cross-flow wind wheel according to claim 1, wherein said cross-flow wind wheel has a wheel diameter ratio d/D ranging from 0.7 to 0.85.
The cross flow wind wheel of claim 1 wherein said cross flow wind wheel comprises a plurality of first blades and a plurality of second blades, said first blades having a width greater than a width of said second blades, said plurality The first blade and the plurality of the second blades are alternately disposed; and/or,

The spacing between the blades is alternately set.
A heater according to the present invention, characterized in that the heater includes a housing and a duct assembly disposed in the housing, the duct assembly including a volute and the cross-flow wind wheel according to claim 1, A cross flow wind wheel is mounted on the volute.
The air heater according to claim 10, wherein one end of the cross flow wind wheel is provided with a rotating shaft, and the volute is provided with a bearing sleeve, and the rotating shaft is received in the bearing sleeve.
The air heater according to claim 11, wherein the end portion of the cross-flow wind wheel not provided with the rotating shaft is provided with a sleeve, and the air duct assembly further comprises a motor mounted on the volute. The sleeve is sleeved on an output shaft of the motor.
The air heater according to claim 10, wherein the vane is obliquely disposed between the two fixed plates along an axial direction of the cross-flow wind turbine, and an angle is formed between the vanes and the fixed plate. θ, 85° ≤ θ ≤ 88°.
The air heater according to claim 10, wherein the blade has an arc shape in cross section, and the arc has a chord length ranging from 6 mm to 8 mm.
The air heater according to claim 14, wherein the cross-sectional wind wheel has a wheel diameter ratio d/D ranging from 0.7 to 0.85.
The air heater according to claim 10, wherein said blade has a thickness ranging from 0.3 mm to 0.5 mm.
The air heater according to claim 10, wherein the outer diameter D of the cross flow wind wheel ranges from 30 mm to 100 mm, and/or the length of the cross flow wind wheel ranges from 150 mm to 600 mm.
The air heater according to claim 10, wherein the number of blades of the cross flow wind wheel is 18 to 25 pieces.
The air heater according to claim 10, wherein said cross-flow wind wheel has a wheel diameter ratio d/D ranging from 0.7 to 0.85.
The air heater according to claim 10, wherein said cross flow wind wheel comprises a plurality of first blades and a plurality of second blades, said first blades having a width greater than a width of said second blades, said plurality of said One blade and a plurality of said second blades are alternately disposed; and/or

The spacing between the blades is alternately set.