CN2407279Y - Refrigerating device with acoustic absorbing guide cone - Google Patents
Refrigerating device with acoustic absorbing guide cone Download PDFInfo
- Publication number
- CN2407279Y CN2407279Y CN 00200772 CN00200772U CN2407279Y CN 2407279 Y CN2407279 Y CN 2407279Y CN 00200772 CN00200772 CN 00200772 CN 00200772 U CN00200772 U CN 00200772U CN 2407279 Y CN2407279 Y CN 2407279Y
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- sound absorption
- deflection cone
- sound
- cone
- absorption deflection
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- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a refrigerating device with an acoustic absorbing guide cone. The utility model comprises a box body which is used for placing a blower. The acoustic absorbing guide cone which is made from a sound absorbing material is arranged on a rigid body position of the body, and the rigid body position of the body just faces to an outlet of a fan of the blower. The conical surface of the acoustic absorbing guide cone is streamline form had best. The acoustic absorbing guide cone has the double functions of sound absorption and flow guide, so the rotational noise of the fan can be eliminated to cause the secondary noise; thereby, the good noise-reducing effect can be obtained.
Description
The utility model relates to a kind of refrigerating appliance, relates in particular to a kind of refrigerating appliance with sqouynd absorption lowering noise characteristic.
Refrigerating appliance such as refrigerator, refrigerator, the noise pollution that its blower fan produced not only causes the concern of environmental administration, also causes industry designers such as household electrical appliances and consumer's great attention.
At present, in order to the method that solves noise several different methods such as screen method, the resonance method, interference method and sound absorption method are arranged substantially.These methods are applied to obtain some progress in some environment to some extent, are still a long-term and difficult task but solve noise pollution.
When blower fan turns round, can produce strong noise under certain operating mode.This noise mainly comprises air power noise and mechanical noise two parts.Air power noise wherein can be divided into rotational noise and eddy current crack again.The blower fan rotational noise that is produced that turns round under the certain pressure condition is that blade periodically hits air particle, causes the pressure fluctuation of air, and the periodic noise that forms; Blower fan is a large amount of air whirls that the draught fan impeller surface forms formed noises when separating on impeller interface at the eddy current crack that produced of turning round under the certain pressure condition.
Therefore mobile directly the affacting on the rigid body on the fan opposite of laying fan box of air that present refrigerating appliance, its fan rotatablely move and cause, cause above-mentioned rotational noise also can produce the secondary noise.
The purpose of this utility model is to provide a kind of refrigerating appliance that can eliminate by secondary noise due to the fan rotational noise of blower fan and the even water conservancy diversion of energy.
Above-mentioned purpose of the present utility model is to be provided with the such technical measures of sound absorption deflection cone by the rigid body that refrigerating appliance is laid the fan outlet opposite of fan box to reach.
Refrigerating appliance with sound absorption deflection cone of the present utility model comprises the casing of laying blower fan, wherein at described casing on the rigid body position of described blower fan outlet, be provided with the sound absorption deflection cone that constitutes by sound-absorbing material or sound absorbent perforated structure.
Refrigerating appliance with sound absorption deflection cone of the present utility model, the wherein said casing of laying blower fan is arranged in the refrigerating chamber.
Refrigerating appliance with sound absorption deflection cone of the present utility model, the cone bottom diameter of wherein said sound absorption deflection cone equals the diameter of described blower fan at least.
Refrigerating appliance with sound absorption deflection cone of the present utility model, the cone bottom diameter of wherein said sound absorption deflection cone equals 140mm, and the vertex of a cone to the height of boring the end equals 30mm.
Refrigerating appliance with sound absorption deflection cone of the present utility model, wherein said sound-absorbing material is a porous material.
Refrigerating appliance with sound absorption deflection cone of the present utility model, wherein said porous material is a foamed plastics.
Refrigerating appliance with sound absorption deflection cone of the present utility model, the conical surface of wherein said sound absorption deflection cone is streamlined.
Advantage with refrigerating appliance of sound absorption deflection cone of the present utility model is: the sound absorption deflection cone that is provided with on refrigerating appliance blower fan opposite has the double action of sound absorption and water conservancy diversion, and it adopts porous sound-absorbing material to make.This material has many small gaps and continuous hole, and in be interlinked to the outside.When sound wave when these pores enter material internal, cause air vibration in the hole, cause the friction of hole wall, because of the effect of friction and viscous force, make quite a few acoustic energy convert heat energy to and be consumed, the sound of reflection is weakened accordingly, thereby obtain the effect of sqouynd absorption lowering noise, and this sound absorption deflection cone compact conformation, install simple and convenient, need not original product is carried out a large amount of transformations, therefore economical and practical, be easy to apply.
Below in conjunction with accompanying drawing an embodiment of the present utility model is elaborated.
Fig. 1 is the schematic diagram that the wind cooling refrigerator embodiment of refrigerating appliance that the utlity model has the sound absorption deflection cone opens refrigerating chamber door.
Fig. 2 is the cross-sectional schematic that A-A lays at the place fan box among Fig. 1.
Fig. 3 is that the B of Fig. 2 is to schematic diagram.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is that wind cooling refrigerator shown in Figure 1 installs forward and backward third-octave frequency spectrum and the overall sound pressure level comparison diagram of sound absorption deflection cone additional before fan outlet.
As shown in Figures 1 to 4, the refrigerating appliance with sound absorption deflection cone of the present utility model is a wind cooling refrigerator.It comprises refrigerating chamber 1, refrigerating chamber 2, lays the casing 4 of blower fan 3, and blower fan 3 is placed in the back on casing 4 tops, on the rigid body portion of blower fan 3 fans 5 outlets, is pasted with the sound absorption deflection cone 6 that is made of foamed plastics in the front on casing 4 tops.The cone bottom diameter of this sound absorption deflection cone equals 140mm, and the vertex of a cone to the height of boring the end equals 30mm, and the conical surface is streamlined.
Test with above-mentioned wind cooling refrigerator, when the fan of blower fan when nominal situation turns round, described sound absorption deflection cone 4 plays a role.In the case, according to the measuring method of the standard GB/T8059.2-1995 of the People's Republic of China (PRC) " family expenses refrigerating appliance household refrigerator-freezer ", the total noise of centrifuge sound pressure level that records in the preceding 1 meter distant place of above-mentioned wind cooling refrigerator is 28.7dBA.The total noise of centrifuge sound pressure level that does not adopt the wind cooling refrigerator of described sound absorption deflection cone 4 is 29.7dBA.The noise contrast of the two is as shown in the table.
| Frequency Hz | The sound pressure level that adds the deflection cone that absorbs sound | The sound pressure level that does not add the deflection cone that absorbs sound |
| 40 | 11 | |
| 100 | 12.4 | |
| 160 | 17.4 | 23.5 |
| 200 | 18.6 | 17 |
| 250 | 14.4 | 13.5 |
| 315 | 17 | 14.8 |
| 400 | 16 | 15.7 |
| 500 | 18.3 | 16.7 |
| 630 | 14 | 14 |
| 800 | 16.7 | 17.4 |
| 1K | 16 | 16.3 |
| 1.25K | 14.8 | 14 |
| 1.6K | 12.4 | 12.4 |
| 2K | 11.8 | 11 |
| 2.5K | 11.8 | 11 |
| 3.15K | 11 | 11 |
| 4K | 11 | |
| 5K | 11.8 | 11.8 |
| 10K | 11.6 | 11.6 |
| LAdBA | 28.7 | 29.7 |
As shown in Figure 5, the black among the figure represents to be unkitted the preceding noise decibel value under different frequency of sound absorption deflection cone; After the sound absorption deflection cone is installed in the ash colour specification additional, the noise decibel value under different frequency.As can be seen from the figure, install additional and reduce by 1 decibel before complete machine overall noise sound pressure level is unkitted the sound absorption deflection cone behind the sound absorption deflection cone.
Above-mentioned wind cooling refrigerator is an embodiment, if wherein said sound absorption deflection cone is widely used in size and the space bigger household appliances or refrigerating appliance with fan, all can obtain good noise reduction.
Claims (9)
1, a kind of refrigerating appliance with sound absorption deflection cone comprises the casing of laying blower fan, it is characterized in that: on the rigid body position of described blower fan outlet, be provided with the sound absorption deflection cone that is made of sound-absorbing material or sound absorbent perforated structure at described casing.
2, the refrigerating appliance with sound absorption deflection cone according to claim 1, it is characterized in that: the described casing of laying blower fan is arranged in the refrigerating chamber.
3, the refrigerating appliance with sound absorption deflection cone according to claim 1 and 2, it is characterized in that: the cone bottom diameter of described sound absorption deflection cone equals the diameter of described blower fan at least.
4, the refrigerating appliance with sound absorption deflection cone according to claim 3, it is characterized in that: the cone bottom diameter of described sound absorption deflection cone equals 140mm, and the vertex of a cone to the height of boring the end equals 30mm.
5, according to claim 1,2 or 4 described refrigerating appliances with sound absorption deflection cone, it is characterized in that: described sound-absorbing material is a porous material.
6, the refrigerating appliance with sound absorption deflection cone according to claim 3, it is characterized in that: described sound-absorbing material is a porous material.
7, the refrigerating appliance with sound absorption deflection cone according to claim 5, it is characterized in that: described porous material is a foamed plastics.
8, the refrigerating appliance with sound absorption deflection cone according to claim 6, it is characterized in that: described porous material is a foamed plastics.
9, according to claim 7 or 8 described refrigerating appliances with sound absorption deflection cone, it is characterized in that: the conical surface of described sound absorption deflection cone is streamlined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00200772 CN2407279Y (en) | 2000-01-25 | 2000-01-25 | Refrigerating device with acoustic absorbing guide cone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00200772 CN2407279Y (en) | 2000-01-25 | 2000-01-25 | Refrigerating device with acoustic absorbing guide cone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2407279Y true CN2407279Y (en) | 2000-11-22 |
Family
ID=33570159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00200772 Expired - Fee Related CN2407279Y (en) | 2000-01-25 | 2000-01-25 | Refrigerating device with acoustic absorbing guide cone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2407279Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110785621A (en) * | 2017-06-23 | 2020-02-11 | 奥利弗.施米兹 | Heat storage element for a distributed space ventilation installation with axial fans, heat storage device and distributed space ventilation installation |
-
2000
- 2000-01-25 CN CN 00200772 patent/CN2407279Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110785621A (en) * | 2017-06-23 | 2020-02-11 | 奥利弗.施米兹 | Heat storage element for a distributed space ventilation installation with axial fans, heat storage device and distributed space ventilation installation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |