CN217604335U

CN217604335U - Fresh air noise reduction device and air conditioner

Info

Publication number: CN217604335U
Application number: CN202221429318.8U
Authority: CN
Inventors: 葛文博; 张守信; 李建建; 王烨; 芦静; 汪健
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2022-10-18
Anticipated expiration: 2032-06-09

Abstract

The utility model provides a device of making an uproar, air conditioner fall in new trend, wherein, a device of making an uproar falls in new trend, include: the casing, the casing has the cavity, first inner wall has in the cavity, be provided with honeycomb on the first inner wall, when there is the sound wave in the cavity, the sound wave can with the honeycomb contact, so that sound wave in the cavity reduces. The defect that in the prior art, the jet noise generated when high-speed airflow enters the air inlet cavity along the fresh air pipeline is difficult to reduce can be overcome.

Description

Fresh air noise reduction device and air conditioner

Technical Field

The utility model relates to a technical field of making an uproar falls in the air conditioner, concretely relates to device, air conditioner of making an uproar falls in new trend.

Background

According to statistics, the indoor time of a person in life accounts for 80%, the traditional air conditioner can only perform indoor air internal circulation, so that the indoor carbon dioxide concentration is increased, and other factors which are not beneficial to health are caused, and the ever-increasing requirement of clean air of people cannot be met. The appearance of the fresh air conditioner changes the current situation of indoor air internal circulation, and the fresh air conditioner introduces filtered outdoor air into a room. The filter equipment adopts high-efficient HEPA net to filter, owing to at the limited pipeline air inlet of diameter, the great centrifugal fan of wind pressure is selected for use to the fan.

Fresh air pipeline need punch the wall, and the pipe diameter is limited, advances the filtration of HEPA net, and it is little to lead to the fresh air amount of wind under the low-speed. For small air quantity, a centrifugal fan is adopted to run at a high rotating speed in the industry. The noise of the fan is obvious at high rotating speed. In the industry, attention is paid to a noise reduction method which is efficient, low in cost and less in air quantity loss.

Patent CN111473507B proposes at the new trend mechanism air outlet installation detachable noise reduction device, through new trend mechanism noise sound wave spectrum analysis, the controller judges and compares in the sound wave spectrum of storage, sends the noise reduction audio frequency waveform opposite with noise frequency through noise reduction device, weakens the noise waveform peak value that the new trend export causes, and the effectual noise that reduces the wind gap produced because of the air current. The fresh air conditioner body comprises a controller, and the noise reduction device comprises an audio waveform generator and a noise detector.

Patent CN212618746U proposes that the pipeline noise in the fresh air device is more obvious, optimizes the pipeline. The structure of making an uproar falls in this patent and locates fresh air channel department in the casing, falls the structure of making an uproar and is used for reducing the noise of fresh air channel.

Patent CN111536681B proposes to establish a noise reduction device in a duct of an air conditioner comprising an active noise reduction device comprising: a noise reduction controller; the reference microphone is connected with the noise reduction controller and used for collecting noise signals in the ventilation pipeline and sending the noise signals to the noise reduction controller, and the noise reduction controller outputs control signals; the loudspeaker is connected with the noise reduction controller and is installed on one side, far away from the noise source, of the reference microphone, the control signal output by the noise reduction controller enables the loudspeaker to send a noise reduction signal, and the phase of the noise reduction signal is opposite to that of the noise signal, so that the effect of eliminating noise is achieved.

To new trend mechanism, the noise source is comparatively complicated, not only has the pipeline noise, through experimental and simulation analysis, reachs that new trend mechanism noise mainly still has: the high-speed airflow enters the air inlet cavity along the fresh air pipeline to generate airflow jet noise and fan rotation noise. The prior art noise reduction equipment can only reduce the noise of the pipeline mostly, and the convection jet noise and the fan rotating noise are not in an effective noise reduction mode.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a device, air conditioner of making an uproar falls in new trend can overcome among the prior art high-speed air current and follow the new trend pipeline and get into the defect that the jet noise that the air inlet chamber produced is difficult to reduce.

In order to solve the problem, the utility model provides a device of making an uproar falls in new trend, include: the casing, the casing has the cavity, first inner wall has in the cavity, be provided with honeycomb on the first inner wall, when sound wave exists in the cavity, the sound wave can with the honeycomb contact, so that the sound wave in the cavity reduces.

In some embodiments, a baffle is disposed on the honeycomb structure, the honeycomb structure is located between the baffle and the first inner wall, the baffle can block a contact area of the honeycomb structure and the sound wave, and the baffle can move in the hollow cavity to adjust the contact area of the honeycomb structure and the sound wave.

In some embodiments, the inner wall of the housing is provided with a groove, and both sides of the baffle are located in the groove along the movement direction of the baffle, so that the baffle can move along the groove.

In some embodiments, a driving member is disposed on the housing, and the driving member can drive the baffle to move.

In some embodiments, a gear is disposed on the driving shaft of the driving member, the baffle is at least partially located outside the housing, and a rack is disposed on an end surface of the baffle away from the honeycomb structure along a moving direction of the baffle, and the gear can be engaged with the rack so that the driving member provides power for the baffle.

In some embodiments, the fresh air noise reduction device further includes an air inlet pipe and a volute, both of which are communicated with the hollow cavity, the air inlet pipe can send fresh air into the hollow cavity, and fresh air energy in the hollow cavity flows into the volute.

In some embodiments, a filter screen is disposed within the hollow cavity, the filter screen being located at a junction of the volute and the hollow cavity.

In some embodiments, the end surface of the honeycomb structure away from the first inner wall and the first inner wall form an included angle a, preferably 10 °, and the rotation surface of the centrifugal fan is parallel to the first inner wall.

The utility model also provides an air conditioner, it includes that foretell new trend falls the device of making an uproar.

The utility model provides a pair of device, air conditioner of making an uproar fall in new trend utilizes honeycomb, adopts the formula of hindering that increases the sound wave plane of reflection to fall the technique of making an uproar, reaches good noise reduction in the messenger's casing. The defect that in the prior art, the jet noise generated when high-speed airflow enters the air inlet cavity along the fresh air pipeline is difficult to reduce can be overcome.

Drawings

Fig. 1 is a perspective view of a fresh air noise reduction device according to an embodiment of the present invention;

fig. 2 is a front view of a fresh air noise reduction device according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a fresh air noise reduction device according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a volute in the fresh air noise reduction device according to the embodiment of the present invention;

fig. 5 is a top view of a honeycomb structure in the fresh air noise reduction device according to the embodiment of the present invention;

fig. 6 is a schematic view of the moving direction of the baffle in the fresh air noise reduction device according to the embodiment of the present invention;

fig. 7 is a flowchart of a control method of the fresh air noise reduction device according to an embodiment of the present invention;

fig. 8 is a schematic diagram of the position of the baffle when N is less than or equal to N1 in the control method of the fresh air noise reduction device according to the embodiment of the present invention;

fig. 9 is a schematic position diagram of the baffle when N2 is not greater than N in the control method of the fresh air noise reduction device according to the embodiment of the present invention.

The reference numerals are represented as:

1. an air inlet pipe; 2. a housing; 3. a baffle plate; 4. a drive member; 5. a volute; 6. an air outlet; 7. a filter screen; 8. a centrifugal fan; 9. a honeycomb structure.

Detailed Description

With reference to fig. 1 to 9, according to an embodiment of the present invention, a device for reducing noise in fresh air is provided, including: the casing 2, casing 2 has the air inlet chamber in the cavity is equivalent to the background art, first inner wall has in the cavity, be provided with honeycomb 9 on the first inner wall, when there is the sound wave in the cavity, the sound wave can with honeycomb 9 contacts, so that sound wave in the cavity reduces. In this technical solution, referring to fig. 5, the honeycomb structure 9 is a honeycomb-shaped structure, the honeycomb structure 9 is disposed on the first inner wall, and a resistance-type noise reduction technology is adopted to increase a sound wave reflection surface, so that a good noise reduction effect is achieved in the housing. The defect that the jet noise generated when high-speed airflow enters the air inlet cavity along the fresh air pipeline is difficult to reduce in the prior art can be overcome. Experiments show that the noise improvement is obvious, and the noise value can be reduced by 20%.

In a specific embodiment, the baffle 3 is disposed on the honeycomb structure 9, the honeycomb structure 9 is located between the baffle 3 and the first inner wall, the baffle 3 can block a contact area of the honeycomb structure 9 and the sound wave, and the baffle 3 can move in the hollow cavity to adjust the contact area of the honeycomb structure 9 and the sound wave. Among this technical scheme, preferred, there is the clearance between baffle 3 and the honeycomb 9, can reach syllable-dividing effect through the clearance, and is specific, archives 3 and first inner wall parallel, through the motion of baffle 3 to adjust honeycomb 9 with the area of contact of sound wave falls the noise source of different frequencies and makes an uproar.

In a specific embodiment, a groove is provided on the inner wall of the housing 2, and both sides of the baffle 3 are located in the groove along the moving direction of the baffle 3, so that the baffle 3 can move along the groove. In the technical scheme, the movement path of the baffle 3 is ensured through the groove, and the baffle 3 can also be supported, so that the honeycomb structure 9 is ensured to reduce the noise of different frequencies.

In a specific embodiment, a driving member 4 is disposed on the housing 2, and the driving member 4 can drive the baffle 3 to move. Specifically, a gear is arranged on a driving shaft of the driving part 4, at least part of the baffle 3 is located outside the shell 2, a rack is arranged on the end face, away from the honeycomb structure 9, of the baffle 3 along the moving direction of the baffle 3, and the gear can be meshed with the rack, so that the driving part 4 provides power for the baffle 3. In the technical scheme, preferably, the rack is arranged in the middle of the baffle 3, the fixing plate is arranged outside the shell 2 to provide supporting force for the drawn baffle, the driving part 4 is preferably a motor, and the driving part 4 and the baffle 3 transmit power through the gear and the rack so as to enable the baffle 3 to move.

In a specific embodiment, the wind power generation device further comprises an air inlet pipe 1 and a volute 5, wherein the air inlet pipe 1 and the volute 5 are both communicated with the hollow cavity, fresh air can be sent into the hollow cavity through the air inlet pipe 1, and fresh air in the hollow cavity can flow into the volute 5. Specifically, a filter screen 7 is arranged in the hollow cavity, and the filter screen 7 is located at the joint of the volute 5 and the hollow cavity. The novel air conditioner is characterized in that a centrifugal fan 8 is arranged in the volute 5, the centrifugal fan 8 can suck fresh air in the hollow cavity into the volute 5, and an air outlet 6 is formed in the volute 5. Among this technical scheme, filter screen 7 adopts detachable assembly methods, for example set up the opening at the lateral wall of casing 2, the mode that inserts filter screen 7 through the opening realizes dismantling, the new trend passes through air-supply line 1 and gets into in casing 2, under centrifugal fan 8's effect, get into among the spiral case 5, discharge through air outlet 6 at last, form the new trend passageway, spiral case 5 is the shell form of snail, the preferred HEPA net of filter screen 7, the HEPA net is for reaching the filter screen of HEPA standard, impurity in the filtered air through filter screen 7, guarantee the new trend branch road.

In a specific embodiment, the end surface of the honeycomb structure 9 remote from the first inner wall is at an angle a, preferably 10 °, to the first inner wall, and the rotational plane of the centrifugal fan 8 is parallel to the first inner wall. Among this technical scheme, centrifugal fan 8's the face that forms when the rotatory face of flabellum top is centrifugal fan, A is preferred 10, can guarantee the flow of new trend in casing 2 promptly, make honeycomb 9 not influence the flow of new trend, again can the biggest area contact sound wave, make the sound wave reflect in honeycomb 9, centrifugal fan 8's the face of revolution and first inner wall parallel, the noise that produces when guaranteeing centrifugal fan is rotatory and the maximize of honeycomb 9 area of contact, and the distance is the shortest, the noise reduction effect has been guaranteed.

The utility model also provides a control method of above-mentioned new trend noise reduction device, include:

a detection step of detecting the real-time rotating speed N of the centrifugal fan 8;

a judging step of judging a relationship between the real-time rotating speed N of the centrifugal fan 8 and a first preset rotating speed N1 and a second preset rotating speed N2, and determining the type of noise inside the shell 2, wherein: the first preset rotating speed N1 and the second preset rotating speed N2 are constants, and N1 is less than N2;

and a control step, controlling the baffle 3 to move according to the noise type in the shell 2, and adjusting the contact area of the honeycomb structure 9 and the sound wave.

Specifically, when N is not less than N1, the inside of the casing 2 is jet noise, when N1 is greater than N and less than N2, the inside of the casing 2 is pipe noise, and when N2 is not less than N, the inside of the casing 2 is rotation noise of the centrifugal fan 8.

When the jet noise or the pipeline noise exists in the shell 2, the baffle 3 is controlled to move, so that at least part of area of the honeycomb structure 9 is contacted with the sound wave; when the centrifugal fan 8 rotates and generates noise in the shell 2, the baffle 3 is controlled to move, so that the whole area of the honeycomb structure 9 is in contact with the sound wave.

When the jet noise exists in the shell 2, the baffle 3 is controlled to move, so that one third of the area of the honeycomb structure 9 is contacted with the sound wave; when the noise of the pipeline exists in the shell 2, the baffle 3 is controlled to move, so that two thirds of the area of the honeycomb structure 9 is contacted with the sound wave.

Referring to fig. 7, in the technical solution, when N1 is preferably 1800rpm, N2 is preferably 2300rpm, and N is equal to or less than N1, it is determined that the rotation speed of the centrifugal fan 8 is slow, at this time, a main noise source in the housing 2 is ejection noise generated by high-speed airflow entering the air intake cavity along the fresh air duct, when N1 is greater than N and less than N2, it is determined that the rotation speed of the centrifugal fan 8 is medium, at this time, a main noise source in the housing 2 is duct noise, when N2 is equal to or less than N, it is determined that the rotation speed of the centrifugal fan is fast, at this time, a main noise source in the housing 2 is rotational noise of the centrifugal fan 8, a main noise form of the fresh air mechanism is determined according to a category corresponding to an actual rotation speed, after the main noise form is determined, the honeycomb barrier movement control is executed in the control, at this time, the motor operates, and the motor rotates to drive the position of the movable barrier to move. The position of the honeycomb baffle plate is moved to a set position, and the main noise at the rotating speed is subjected to noise reduction treatment, so that the noise can be effectively reduced by 20%. Wherein, new trend mechanism voltage is unchangeable, can utilize the electric current size to confirm 8 rotational speeds of centrifugal fan.

The utility model also provides an air conditioner, fall the device of making an uproar including above-mentioned new trend.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a device of making an uproar falls in new trend which characterized in that: the method comprises the following steps: casing (2), casing (2) have the cavity, first inner wall has in the cavity, be provided with honeycomb (9) on the first inner wall, when there is the sound wave in the cavity, the sound wave can with honeycomb (9) contact, so that the sound wave in the cavity reduces.

2. The fresh air noise reduction device according to claim 1, characterized in that: be provided with baffle (3) on honeycomb (9), honeycomb (9) are located baffle (3) with between the first inner wall, baffle (3) can block honeycomb (9) with the area of contact of sound wave, just, baffle (3) can be in the motion in the cavity, in order to adjust honeycomb (9) with the area of contact of sound wave.

3. The fresh air noise reduction device according to claim 2, characterized in that: the inner wall of the shell (2) is provided with a groove, and along the movement direction of the baffle (3), the two sides of the baffle (3) are both positioned in the groove, so that the baffle (3) can move along the groove.

4. The fresh air noise reduction device according to claim 2, characterized in that: the shell (2) is provided with a driving piece (4), and the driving piece (4) can drive the baffle (3) to move.

5. The fresh air noise reduction device according to claim 4, wherein: be provided with the gear in the drive shaft of driving piece (4), baffle (3) are located at least partially outside casing (2), follow the direction of motion of baffle (3), the terminal surface that honeycomb (9) were kept away from in baffle (3) is provided with the rack, the gear can with the rack meshes mutually, so that driving piece (4) do baffle (3) provide power.

6. The fresh air noise reduction device according to claim 1, characterized in that: the novel wind power generation device is characterized by further comprising an air inlet pipe (1) and a volute (5), wherein the air inlet pipe (1) and the volute (5) are communicated with the hollow cavity, fresh air can be sent into the hollow cavity through the air inlet pipe (1), and fresh wind energy in the hollow cavity flows into the volute (5).

7. The fresh air noise reduction device according to claim 6, wherein: a filter screen (7) is arranged in the hollow cavity, and the filter screen (7) is located at the joint of the volute (5) and the hollow cavity.

8. The fresh air noise reduction device according to claim 6, wherein: the novel air conditioner is characterized in that a centrifugal fan (8) is arranged in the volute (5), the centrifugal fan (8) can suck fresh air in the hollow cavity into the volute (5), and an air outlet (6) is formed in the volute (5).

9. The fresh air noise reduction device according to claim 8, wherein: an included angle between the end face, far away from the first inner wall, of the honeycomb structure (9) and the first inner wall is A, the A is preferably 10 degrees, and the rotating surface of the centrifugal fan (8) is parallel to the first inner wall.

10. An air conditioner, characterized in that: a fresh air noise reduction device comprising any one of claims 1-9.