CN214533560U

CN214533560U - Warm air blower

Info

Publication number: CN214533560U
Application number: CN202120783423.0U
Authority: CN
Inventors: 聂建圣; 何爱民
Original assignee: Shenzhen Hesheng Innovation Technology Co ltd
Current assignee: Shenzhen Hesheng Innovation Technology Co ltd
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-10-29
Anticipated expiration: 2031-04-16
Also published as: US20220333610A1

Abstract

The utility model provides a fan heater, including casing, support, cross-flow wind wheel, spiral shell tongue, cross-flow wind wheel and spiral shell tongue set up in the casing, the cross-flow wind wheel is located between spiral shell tongue and the casing, the support with the casing is connected; the cross-flow wind wheel comprises two fixing plates which are oppositely arranged and a plurality of blades which are connected between the two fixing plates, the cross sections of the blades are arc-shaped, and the chord length range of the arc-shaped is 9-10 mm. The time that each position on same blade can pass through minimum clearance between the blade at different moments lengthens, reduces the noise of whistling that produces to make the frequency range of the noise when cross-flow wind wheel operates wider, avoided the resonance peak value that the noise stack of the same kind and frequency brought, thereby avoided the frequency of noise to concentrate, reduced noise intensity, improved the experience sense that the user used.

Description

Warm air blower

Technical Field

The utility model relates to a fan heater technical field, concretely relates to use fan heater of cross-flow wind wheel.

Background

The cross-flow wind wheel is widely used in the field of fan heaters, so that the requirement on noise control is higher. The fan heater consists of a shell, a heating device, a volute tongue and a cross-flow wind wheel, wherein the cross-flow wind wheel is driven by a transmission shaft of a motor to rotate, blades of the cross-flow wind wheel drive peripheral airflow to flow in the rotating process, and the airflow flows through the blades twice, flows in from the blades on one side of the cross-flow wind wheel and flows out from the volute tongue. When the airflow passes through the blades twice, the airflow forms a flowing vortex in the wind wheel, the size and the position of the vortex influence the through-flow capacity and noise of the indoor unit to different degrees, certain squeaking sound can be generated in the flowing process, and the superposition of noise of the same type and frequency can bring a resonance peak value. Therefore, the whole noise generated by the wind wheel used by the existing fan heater is large, and the experience of a user is seriously influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a fan heater solves the aforesaid cross-flow wind wheel during operation of fan heater produce the noise, influence user experience's problem.

The utility model discloses a following technical scheme realizes:

the utility model provides a fan heater, including casing, support, cross-flow wind wheel, spiral shell tongue, cross-flow wind wheel and spiral shell tongue set up in the casing, the cross-flow wind wheel is located between spiral shell tongue and the casing, the support with the casing is connected; the cross-flow wind wheel comprises two fixing plates which are oppositely arranged and a plurality of blades which are connected between the two fixing plates, the cross sections of the blades are arc-shaped, and the chord length range of the arc-shaped is 9-10 mm.

Further, the fixed plate is circular, and a plurality of the tip of blade all passes the fixed plate and outwards extends, and a plurality of blade is evenly arranged along the circumference outer fringe of fixed plate at interval.

Furthermore, a plurality of reinforcing plates are arranged between the two fixing plates at intervals, and the blades penetrate through the reinforcing plates and extend outwards.

Furthermore, the blades are obliquely arranged between the two fixing plates rightwards along the axial direction of the cross flow wind wheel, an included angle theta is formed between the blades and the fixing plates, and the included angle theta is 80-90 degrees.

Furthermore, one end of the cross-flow wind wheel is provided with a rotating shaft, the shell is provided with a first bearing sleeve, and the rotating shaft is accommodated in the first bearing sleeve.

Furthermore, one end, far away from the rotating shaft, of the cross-flow wind wheel is provided with a second bearing sleeve, the fan heater further comprises a motor arranged on the shell, and the second bearing sleeve is arranged on an output shaft of the motor in a sleeved mode.

Furthermore, the fan heater also comprises a heating device arranged in the bracket.

The utility model has the advantages that:

the shell is connected with the bracket to form a shell of the warm air blower, the volute tongue is positioned on one side of the bracket, the shell is provided with an open slot, the open slot is an air inlet of the warm air blower, and the volute tongue is an air outlet. When the cross-flow wind wheel rotates, the blades drive peripheral airflow to flow into the cross-flow wind wheel in the rotating process and generate squealing sound, the chord length of each blade is set to be 9-10 mm, the time that each part on the same blade passes through the minimum gap between the blades at different moments is prolonged, the generated squealing sound is reduced, the frequency range of noise in the operation of the cross-flow wind wheel is wider, the phenomenon that resonance peak values are brought by noise superposition of the same type and frequency is avoided, the frequency concentration of the noise is avoided, the noise intensity is reduced, and the experience of a user is improved.

Drawings

Fig. 1 is an overall schematic view of a fan heater provided by the present invention;

fig. 2 is a partially enlarged schematic view of a portion a of fig. 1 according to the present invention;

fig. 3 is an overall schematic view of the fan heater provided by the present invention;

fig. 4 is an overall schematic view of the cross-flow wind wheel provided by the present invention;

fig. 5 is a schematic partially enlarged view of the portion B of fig. 4 according to the present invention.

Detailed Description

For a more clear and complete description of the technical solution of the present invention, the following description is made with reference to the accompanying drawings.

Referring to fig. 1 to 4, a fan heater includes a housing 1, a bracket 2, a cross-flow wind wheel 3, and a volute tongue 4, wherein the cross-flow wind wheel 3 and the volute tongue 4 are disposed in the housing 1, the cross-flow wind wheel 3 is located between the volute tongue 4 and the housing 1, and the bracket 2 is connected to the housing 1; the cross-flow wind wheel 3 comprises two fixing plates 31 which are oppositely arranged and a plurality of blades 32 which are connected between the two fixing plates 31, the cross section of each blade 32 is arc-shaped, and the range of the chord length 321 of each arc-shaped is 9-10 mm.

In the embodiment, the casing 1 is used for providing a placing space for the volute tongue 4 and the cross-flow wind wheel 3, one surface of the casing 1 is connected with the support 2 to form a shell of the fan heater, the volute tongue 4 is positioned on one side of the support 2, the shell is provided with an open slot, the open slot is an air inlet (not marked) of the fan heater, and the volute tongue 4 is an air outlet (not marked) of the fan heater. Specifically, when the cross-flow wind wheel 3 rotates, the airflow flows in from the air inlet of the fan heater, passes through the cross-flow wind wheel and then is blown out from the air outlet.

In the present embodiment, both ends of each blade 32 are fixed to the two fixing plates 31, respectively. The section of the blade 32 in the direction vertical to the axial plane of the cross-flow wind wheel 3 is arc-shaped, and the chord length 321 of the arc-shaped is 9 mm-10 mm. Specifically, when the cross-flow wind wheel 3 rotates, the blades 32 drive surrounding air to flow into the cross-flow wind wheel 3 in the rotating process, the blades 32 can generate squealing sound in the wind sweeping process, and by setting the chord length 321 of the blades 32 to be 9-10 mm, the time that each part on the same blade 32 can pass through the minimum gap between the blades 32 at different moments is prolonged, so that the generated squealing sound is reduced, the frequency range of noise in the operation of the cross-flow wind wheel 3 is wider, the frequency concentration of the noise is avoided, the noise intensity is reduced, and the use comfort of a user is improved.

Referring to fig. 2 and 4, the fixing plate 31 is circular, the ends of the plurality of blades 32 penetrate through the fixing plate 31 and extend outward, and the plurality of blades 32 are uniformly spaced along the outer edge of the fixing plate 31. In this embodiment, the plurality of blades 32 are uniformly arranged along the outer edge of the fixing plate 31 at intervals to form the cross-flow wind wheel 3, and the cross-flow wind wheel 3 is cylindrical.

Referring to fig. 2 and 4, a plurality of reinforcing plates 33 are spaced between the two fixing plates 31, and the blades 32 pass through the reinforcing plates 33 and extend outward. Specifically, a reinforcing plate 33 is disposed between the two fixing plates 31 at an interval to reinforce the structural strength of the cross-flow wind wheel 3.

Referring to fig. 2, 4 and 5, the blades 32 are obliquely arranged between the two fixing plates 31 to the right along the axial direction of the cross flow wind wheel 3, and an included angle θ is formed between the blades 32 and the fixing plates 31, and is 80-90 degrees. In this embodiment, each of the blades 32 is a long strip, each of the blades 32 is an inclined blade 32 that is inclined to the right along the axial direction of the cross flow wind wheel 3, the extending direction of each of the blades 32 is not parallel to the axial direction of the cross flow wind wheel 3, the included angle between each of the blades 32 and the fixing plate 31 is θ, and the included angle θ is 80 to 90 degrees. Specifically, be perpendicular setting between blade 32 and the fixed plate 31 for each position on same blade 32 can be in the minimum clearance of different moments air current through blade 32, the kind and the frequency of the noise that each position produced are diversified on same blade 32, thereby the stack of the noise of having avoided the same kind and frequency brings resonance peak, the frequency of just also having avoided the noise is concentrated, noise intensity has been reduced, and then the operating noise of electric fan heater has been reduced, user's use comfort has been improved.

Referring to fig. 1, 3 and 4, a rotating shaft 34 is disposed at one end of the cross flow wind wheel 3, the housing 1 is disposed with a first bearing sleeve 11, and the rotating shaft 34 is accommodated in the first bearing sleeve 11. In the present embodiment, the rotating shaft 34 is protruded from the surface of the fixing plate 31 facing the housing 1, and accordingly, the housing 1 is provided with the first bearing sleeve 11 facing the rotating shaft 34, and the bearing 34 is provided in the first bearing sleeve 11. The rotating shaft 34 is accommodated in the first bearing sleeve 11 and inserted into an inner ring of the bearing 34. Specifically, the shaft 34 is accommodated in the first bearing sleeve 11 and inserted into an inner ring of the bearing 34. The vibration of the cross-flow wind wheel 3 in the rotating process can be effectively reduced, the cross-flow wind wheel 3 can rotate more stably, the structure of the fan heater is more stable, and meanwhile, the noise of the fan heater can be effectively reduced due to the reduction of the vibration and the stability of the structure.

Referring to fig. 1 to 4, a second bearing sleeve 35 is disposed at an end of the cross-flow wind wheel 3 away from the rotating shaft 34, the fan heater further includes a motor 5 installed in the housing 1, and the second bearing sleeve 35 is sleeved on an output shaft of the motor 5. In this embodiment, the motor 5 is sleeved on the output shaft of the motor 5 through the second bearing sleeve 35 so as to drive the cross flow wind wheel 3 to rotate. Specifically, when the motor 5 rotates, the output shaft of the motor 5 drives the second bearing sleeve 35 to rotate, the second bearing sleeve 35 is arranged on the fixing plate 31 to drive the cross-flow wind wheel 3 to rotate, and at the moment, the rotating shaft 34 at the other end rotates in the inner ring of the bearing of the first bearing sleeve. The second bearing sleeve 35 is connected with the output shaft of the motor 5 in an interference fit mode, vibration generated between component connection is reduced by the method, and on the other hand, the load of the motor 5 is also reduced, so that the noise of the fan heater is effectively reduced. The first bearing sleeve 11 and the second bearing sleeve 35 can be made of rubber or silicone sleeve materials.

Referring to fig. 1, the fan heater further includes a heating device 21 disposed in the bracket 2. Specifically, the airflow passes through the cross-flow wind wheel 3 and the heating device 21 in sequence from the air inlet and then is blown out from the air outlet. The heat generating device 21 may be a PTC heat generating device.

Of course, the present invention can also have other various embodiments, and based on the embodiments, those skilled in the art can obtain other embodiments without any creative work, and all of them belong to the protection scope of the present invention.

Claims

1. A warm air blower comprises a shell (1), a support (2), a cross-flow wind wheel (3) and a volute tongue (4), and is characterized in that the cross-flow wind wheel (3) and the volute tongue (4) are arranged in the shell (1), the cross-flow wind wheel (3) is positioned between the volute tongue (4) and the shell (1), and the support (2) is connected with the shell (1);

the cross-flow wind wheel (3) comprises two fixing plates (31) which are arranged oppositely and a plurality of blades (32) connected between the two fixing plates (31), the cross sections of the blades (32) are arc-shaped, and the range of the chord length (321) of the arc-shaped is 9-10 mm.

2. The fan heater according to claim 1, wherein the fixing plate (31) is circular, the ends of the plurality of blades (32) penetrate through the fixing plate (31) and extend outwards, and the plurality of blades (32) are uniformly arranged along the circumferential outer edge of the fixing plate (31) at intervals.

3. The fan heater according to claim 1, wherein a plurality of reinforcing plates (33) are arranged between the two fixing plates (31) at intervals, and the blades (32) penetrate through the reinforcing plates (33) and extend outwards.

4. The warm-air drier according to claim 1, characterized in that the blades (32) are arranged between the two fixing plates (31) in a manner of inclining rightwards along the axial direction of the cross-flow wind wheel (3), an included angle θ is formed between the blades (32) and the fixing plates (31), and the included angle θ is 80-90 degrees.

5. The fan heater according to claim 1, characterised in that one end of the cross-flow wind wheel (3) is provided with a rotating shaft (34), the housing (1) is provided with a first bearing sleeve (11), and the rotating shaft (34) is accommodated in the first bearing sleeve (11).

6. The warm-air drier according to claim 5, wherein one end of the cross-flow wind wheel (3) far away from the rotating shaft (34) is provided with a second bearing sleeve (35), the warm-air drier further comprises a motor (5) arranged on the shell (1), and the second bearing sleeve (35) is sleeved on an output shaft of the motor (5).

7. The fan heater according to claim 1, characterized in that it further comprises heating means (21) arranged inside said support (2).