CN211119718U - Air conditioner outdoor unit with rear edge of blade in microporous structure - Google Patents
Air conditioner outdoor unit with rear edge of blade in microporous structure Download PDFInfo
- Publication number
- CN211119718U CN211119718U CN201921421852.2U CN201921421852U CN211119718U CN 211119718 U CN211119718 U CN 211119718U CN 201921421852 U CN201921421852 U CN 201921421852U CN 211119718 U CN211119718 U CN 211119718U
- Authority
- CN
- China
- Prior art keywords
- outdoor unit
- air conditioner
- impeller
- blade
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to an air condensing units energy-conserving technical field who makes an uproar that falls especially relates to an air condensing units that blade trailing edge is cellular structure, a serial communication port, be cellular structure's impeller, heat exchanger, kuppe, motor support, median septum, play net, condenser, liquid storage pot, flow controller, compressor including the blade trailing edge. The utility model provides a pair of air condensing units that trailing edge is microporous structure at air condensing units impeller blade trailing edge trompil, presents microporous structure, carries out the improved design to blade trailing edge structure under the prerequisite that does not increase the cost, and simple process, the expense is low, and the juice is established in the integration of being convenient for, but large-scale production. Meanwhile, on the premise of ensuring that the overall performance of other components of the outdoor unit of the air conditioner is not changed, the outlet flow rate of the outdoor unit of the air conditioner is improved, the pneumatic noise of the outdoor unit of the air conditioner is reduced, the flow loss of the outdoor unit of the air conditioner is reduced, the inherent frequency of an impeller of the outdoor unit of the air conditioner is improved, the efficiency of the outdoor unit of the air conditioner is improved, and the service life of the outdoor unit of the air.
Description
Technical Field
The utility model relates to an air condensing units energy-conservation falls the technical field that makes an uproar, especially relates to an air condensing units that impeller trailing edge is microporous structure.
Background
With the progress of society and the development of science and technology, the quality of life standard of people is obviously improved, and an air conditioner is not used as a luxury household appliance and gradually enters ordinary families, so that the life style of people is changed, and people are warm in winter and cool in summer all the year round. But indoor comfortable and convenient that brings, also to outdoor noise of having propagated, these noises not only can influence indoor user, have reduced self experience and have felt, more can influence surrounding environment, give other people's puzzlement in life and work, have reduced other people's happiness. Moreover, noise originally becomes a major factor of urban pollution, and noise of the air conditioner outdoor unit also serves as a part of a noise pollution source, so people hope to pay attention to noise reduction of the air conditioner, which also becomes a great progress requirement and a great challenge in the air conditioner manufacturing industry.
In terms of research contents of reducing flow loss and aerodynamic noise of the air conditioner outdoor unit and improving aerodynamic efficiency, researchers all over the world propose different research methods, wherein an experimental method and a numerical simulation method are main methods for researching the aerodynamic noise of the air conditioner outdoor unit. For example, the method is a research method which is worth taking a reference, such as a method which is verified by a combination of a research method of numerical simulation and an experimental method for researching the trend of the pneumatic noise of the air conditioner outdoor unit. The modification is to change the aerodynamic characteristics of the outdoor unit of the air conditioner by optimizing the structural parameters of the impeller and designing a new impeller so as to reduce the aerodynamic noise of the outdoor unit of the air conditioner, but changing the structural parameters of the impeller and designing the new impeller change the structural dynamics characteristics of the impeller of the outdoor unit of the air conditioner, so that the problem becomes complex, the influence factors are increased, and the research difficulty is increased.
Among the energy losses of the outdoor unit of the air conditioner, the flow loss is one of the main factors affecting the ventilation efficiency thereof. Because a gap exists between the impeller and the integral casing of the outdoor unit of the air conditioner, when the impeller normally rotates, a turbulent vortex is formed in the rotating area of the impeller, and thus, flow loss is caused. In order to reduce the flow loss caused by the rotation of the impeller, researchers at home and abroad explore the flow performance of the outdoor unit of the air conditioner in the rotating area of the impeller by modifying the blades of the outdoor unit of the air conditioner, and after the rear edges of the blades are perforated, the turbulence state in the outdoor unit of the air conditioner is improved, and the shape and the aperture size of the perforated rear edges of the blades of the outdoor unit of the air conditioner directly influence the ventilation efficiency and the aerodynamic noise of the outdoor unit of the air conditioner.
The utility model provides a pair of air condensing units that blade trailing edge is microporous structure, under the condition that does not change air condensing units's whole inner structure, through carrying out the modification design to impeller blade trailing edge structure, reduce air condensing units's aerodynamic noise, improve ventilation efficiency, improve the atress condition of blade, reduce the fatigue degree of blade, improve air condensing units impeller's natural frequency, increase air condensing units's life, it provides relative design experience and theoretical experience to fall the work of making an uproar for air condensing units.
Disclosure of Invention
The utility model provides a pair of air condensing units, locate the trompil at impeller blade trailing edge, make blade trailing edge structural change, present the cellular structure, under the whole inner structure's of air condensing units condition not changing, through carrying out the retrofit design to blade trailing edge structure, reduce air condensing units's pneumatic noise, improve ventilation efficiency, improve the atress condition of blade, reduce the fatigue degree of blade, improve air condensing units impeller's natural frequency, increase air condensing units's life.
The utility model provides a pair of blade trailing edge is microporous structure's air condensing units, including the impeller body, the blade trailing edge position of impeller body has microporous structure.
The utility model provides a pair of air condensing units, be microporous structure's impeller, heat exchanger, kuppe, motor support, median septum, play net, condenser, liquid storage pot, flow controller, compressor etc. including the blade trailing edge. The heat exchanger, the air guide sleeve, the motor support, the middle partition plate and the air outlet net sequentially form an air duct system of the air conditioner outdoor unit, blades with microporous rear edges are respectively fixed on the blades to form an impeller of the air conditioner outdoor unit, the impeller of the air conditioner outdoor unit is located in the air duct system body of the air conditioner outdoor unit, the condenser, the liquid storage tank and the flow controller are respectively located in the air conditioner outdoor unit, and the compressor drives a refrigerant in the air conditioner refrigeration process.
The utility model provides a pair of air condensing units that blade trailing edge is cellular structure, at air condensing units impeller blade trailing edge department trompil, make blade trailing edge structural change, present the cellular structure, carry out the retrofit design to blade trailing edge structure under the prerequisite that does not increase the cost, simple process, the expense is low, and the juice is established in the integration of being convenient for, but large-scale production. Meanwhile, on the premise of ensuring that the performances of other parts of the outdoor unit of the air conditioner are not changed, the pneumatic noise of the outdoor unit of the air conditioner is reduced, the ventilation efficiency is improved, the fatigue degree of the blades is reduced, the natural frequency of an impeller of the outdoor unit of the air conditioner is improved, the efficiency of the outdoor unit of the air conditioner is improved, and the service life of the outdoor unit of the air conditioner is prolonged.
Drawings
For a clear explanation of the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of an impeller of an outdoor unit of an air conditioner, according to an embodiment of the present invention, wherein the rear edges of the blades are of a microporous structure;
fig. 2 is a schematic view of a microporous structure of an outdoor unit blade of an air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic view of arrangement of noise calculation points in an impeller rotation area of an outdoor unit of an air conditioner according to an embodiment of the present invention;
fig. 4 is a graph illustrating a variation of maximum sound pressure level of noise in a rotation area of an outdoor unit impeller of an air conditioner before and after a trailing edge modification of a blade, at different distances from a center of a cross-section (i.e., a central axis of a hub).
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless explicitly stated or limited otherwise, the terms "mounted", "connected" and "connected" are to be understood broadly, and may for example be fixedly connected, detachably connected or integrally connected; either mechanically or electrically: they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 and fig. 2, the utility model provides a pair of air condensing units that blade trailing edge is cellular structure, including impeller body, impeller body's blade trailing edge part has the micropore, and the blade trailing edge is cellular structure's geometric parameters including micropore diameter R, micropore centre of a circle interval an, micropore centre of a circle apart from blade edge distance b, wherein R =3mm, a =10mm, b =10 mm.
The utility model provides a pair of air condensing units, be microporous structure's impeller, heat exchanger, kuppe, motor support, median septum, play net, condenser, liquid storage pot, flow controller, compressor etc. including the blade trailing edge. The heat exchanger, the air guide sleeve, the motor support, the middle partition plate and the air outlet net sequentially form an air duct system of the air conditioner outdoor unit, blades with microporous structures at the rear edges are respectively fixed on the blades to form an impeller of the air conditioner outdoor unit, the impeller of the air conditioner outdoor unit is located in the air duct system body of the air conditioner outdoor unit, the condenser, the liquid storage tank and the flow controller are respectively located in the air conditioner outdoor unit, and the compressor drives a refrigerant in the air conditioner refrigeration process.
In order to accurately calculate the vortex amount change of the internal flow area of the air conditioner outdoor unit with the trailing edge of the blade not provided with the hole and the trailing edge of the blade in the micropore structure and the aerodynamic noise change characteristic of the impeller rotating area, a FW-H acoustic model is used for carrying out numerical analysis on 6 calculation points in the radial direction of the rotating area of the air conditioner outdoor unit, and the specific noise calculation points are arranged as shown in FIG. 3. The three-dimensional coordinate axis of the calculation area is defined as that the center of the rotation area of the impeller of the air conditioner outdoor unit is taken as a coordinate origin, the direction of an outlet axis is taken as the positive direction of a Z axis, every two mutually perpendicular radial directions passing through the origin are respectively taken as X, Y axes, a coordinate system is established by taking the direction pointing to an air outlet as the positive direction, three coordinate positions taken by the Z axis of a noise calculation section are taken as sections (Z =0 mm), 6 noise calculation points are respectively taken in the radial direction of the sections, namely the Y axis direction, and the axis coordinates of Y are respectively 80mm, 100mm, 120mm, 140mm, 160mm and 180 mm.
In the embodiment of the present invention, the designed size of the trailing edge micro-hole is that the micro-hole diameter R =3mm, the micro-hole center distance a =10mm, the micro-hole center distance b =10mm from the blade edge, and is compared with the unmodified impeller blade. When the rotating speed of the impeller is 820r/min, the vortex amount change of an internal flow area of the outdoor unit is adjusted when the blades are not modified and the rear edges of the blades are in a microporous structure in the rotating area of the impeller of the outdoor unit, which is not modified, is analyzed by adopting large vortex simulation calculation, and the vortex amount value of the rotating area of the impeller of the outdoor unit is 232.5 s-1The vortex value of the rotating area of the impeller of the outdoor unit with the rear edge of the blade in the microporous structure is 213.3s-1The vorticity decreased by 8.26%. Therefore, the rear edge of the blade is of a microporous structure and can effectively break up the vorticity of the rotating area of the impeller of the outdoor unit of the air conditioner, the rear edge of the blade is of a microporous structure so that the vorticity of the inner flow field of the impeller is reduced, the phenomenon of flow disorder is improved, the energy loss is reduced, the efficiency of the outdoor unit of the air conditioner is improved, and the service life of the ventilator is prolonged.
The embodiment of the utility model provides an in, the impeller is under the same rated revolution 820r/min, is the noise frequency spectrum map of the regional noise calculation point of the outdoor air conditioning unit impeller rotation of cellular structure to unmodified and blade trailing edge respectively and analyzes, and outdoor air conditioning unit impeller rotation is regional pneumatic noise mainly comprises the rotatory fundamental frequency and harmonic, the vortex shedding frequency of impeller, and wherein the frequency that the biggest sound pressure level corresponds is the rotatory fundamental frequency 40.04Hz of impeller. As can be seen from fig. 4, the noise spectrogram of each noise test point is analyzed to obtain the maximum sound pressure level of the noise at each calculation point, the Y-axis coordinate value, i.e., the distance from the noise calculation point to the center of the cross section (i.e., the rotation central axis), is an abscissa, and the maximum sound pressure level of the calculation point is an ordinate, and it can be known from a comparison of the variation curve of the maximum sound pressure level of the noise in the microporous structure of the trailing edge of the blade and the variation curve of the maximum sound pressure level of the noise in the microporous structure of the trailing edge of the blade, that is, the sound pressure level in the microporous structure of the trailing edge of the blade is significantly reduced, and at a position 80mm from the center of the hub, the; at the position 100mm away from the center of the hub, the maximum sound pressure level of the rear edge of the blade in a microporous structure is 107.8dB, and the maximum sound pressure level of the unmodified blade is 108.6 dB; at the position 120mm away from the center of the hub, the maximum sound pressure level of the rear edge of the blade in a microporous structure is 107.5dB, and the maximum sound pressure level of the unmodified blade is 108.3 dB; at the position 140mm away from the center of the hub, the maximum sound pressure level of the rear edge of the blade in a microporous structure is 107.3dB, and the maximum sound pressure level of the unmodified blade is 108.8 dB; at a position 160mm away from the center of the hub, the maximum sound pressure level of the rear edge of the blade in a microporous structure is 105.6dB, and the maximum sound pressure level of the unmodified blade is 108.2 dB; at the position 180mm away from the center of the hub, the maximum sound pressure level of the rear edge of the blade in a microporous structure is 101.7dB, and the maximum sound pressure level of the unmodified blade is 103.8 dB; the trailing edge of the blade is in a micropore structure, and the noise is reduced by 1.24% on average compared with the unmodified blade.
In the embodiment of the present invention, under the excitation of 10N excitation force, the test finds that the impeller with the microporous structure at the trailing edge of the blade is increased in the natural frequency of each step compared with the impeller with the unmodified blade, wherein in the first step, the natural frequency of the impeller with the microporous structure at the trailing edge of the blade is 43.2Hz, the natural frequency of the unmodified blade is 40.56Hz, and the natural frequency is increased by 6.5%; in the second order, the natural frequency of the impeller with the rear edge of the blade in a microporous structure is 43.23Hz, the natural frequency of the unmodified impeller of the blade is 42.71Hz, and the natural frequency is improved by 1.2 percent; in the third order, the inherent frequency of the impeller with the rear edge of the blade in a microporous structure is 61.77Hz, the inherent frequency of the unmodified impeller of the blade is 59.56Hz, and the inherent frequency is improved by 3.7 percent; at the fourth step, the natural frequency of the impeller with the microporous structure at the trailing edge of the blade is 64.88Hz, the natural frequency of the unmodified impeller of the blade is 61.72Hz, and the natural frequency is improved by 5.11 percent. This is consistent with the conclusion that a decrease in blade mass in the blade natural frequency equation results in an increase in the blade natural frequency.
Through the modification to blade trailing edge structure, the utility model provides a blade trailing edge is microporous structure's air condensing units, under the prerequisite of taking into account other part performance of air condensing units, the pneumatic noise of air condensing units and the flow loss that the inside fluid of air condensing units caused because of the vortex have been reduced, the atress condition of blade and the inside fluidic turbulent state of air condensing units have been improved, the fatigue degree of blade has been reduced, improve the natural frequency of air condensing units impeller, prolong air condensing units's life.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (2)
1. An air conditioner outdoor unit with a microporous structure at the rear edge of a blade is characterized by comprising a blade body, wherein micropores are formed at the rear edge of the blade of an impeller body;
the sizes of the micropores on the rear edge of the blade are that the diameter R =3mm, the circle center distance a =10mm, and the distance b =10mm from the circle center of the micropore to the edge of the blade;
the vortex quantity of the impeller rotating area of the outdoor unit of the air conditioner is reduced by 8.26% on average compared with that of the impeller rotating area of the outdoor unit of the air conditioner without modified blades;
the noise of the outdoor unit of the air conditioner is averagely reduced by 1.24 percent compared with the rotating area of an impeller of the outdoor unit of the air conditioner without modified blades;
the natural frequency of the impeller of the outdoor unit of the air conditioner is improved by 6.5% in the first order, 1.2% in the second order, 3.7% in the third order and 5.11% in the fourth order compared with the impeller of the outdoor unit of the air conditioner without modified blades.
2. An outdoor unit of an air conditioner, comprising the impeller of claim 1, a heat exchanger, a guide cover, a motor bracket, a middle partition plate, an air outlet net, a condenser, a liquid storage tank, a restrictor, and a compressor, wherein the rear edges of the blades are in a microporous structure;
the heat exchanger, the air guide sleeve, the motor support, the middle partition plate and the air outlet net sequentially form an air duct system of the air conditioner outdoor unit, the blades with microporous structures at the rear edges are respectively fixed on the blades to form an impeller of the air conditioner outdoor unit, the impeller of the air conditioner outdoor unit is located in the air duct system body of the air conditioner outdoor unit, the condenser, the liquid storage tank and the flow controller are respectively located in the air conditioner outdoor unit body, and the compressor drives a refrigerant in the air conditioner refrigeration process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921421852.2U CN211119718U (en) | 2019-08-29 | 2019-08-29 | Air conditioner outdoor unit with rear edge of blade in microporous structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921421852.2U CN211119718U (en) | 2019-08-29 | 2019-08-29 | Air conditioner outdoor unit with rear edge of blade in microporous structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211119718U true CN211119718U (en) | 2020-07-28 |
Family
ID=71699892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921421852.2U Expired - Fee Related CN211119718U (en) | 2019-08-29 | 2019-08-29 | Air conditioner outdoor unit with rear edge of blade in microporous structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211119718U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410880A (en) * | 2019-08-29 | 2019-11-05 | 代元军 | A kind of trailing edge is in the air-conditioner outdoor unit of microcellular structure |
-
2019
- 2019-08-29 CN CN201921421852.2U patent/CN211119718U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410880A (en) * | 2019-08-29 | 2019-11-05 | 代元军 | A kind of trailing edge is in the air-conditioner outdoor unit of microcellular structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201982367U (en) | Cross-flow fan and air conditioner with same | |
| CN101061354B (en) | Air-conditioner | |
| CN203274204U (en) | Noise reduction structure of air conditioner indoor cabinet, air conditioner indoor cabinet and air conditioner | |
| CN211119718U (en) | Air conditioner outdoor unit with rear edge of blade in microporous structure | |
| CN203516197U (en) | Propeller fan and outdoor unit of air conditioner | |
| CN201588817U (en) | Centrifugal fan for range hood | |
| CN210484190U (en) | Air condensing units that blade apex is V type structure | |
| CN2906398Y (en) | Double-side air-sucking type blower fan volute structure of European-type range hood | |
| CN204061331U (en) | The special centrifugal blower of low-noise air purifier and air cleaner | |
| CN211041189U (en) | Air conditioner outdoor unit with sawtooth structure on blade trailing edge | |
| CN105756981A (en) | Noise reduction fan wall for shell-free centrifugal fan | |
| CN2685757Y (en) | Indoor machine of low-noise air conditioner | |
| CN219711884U (en) | Volute structure, fresh air module and fresh air conditioner | |
| CN212179010U (en) | Indoor unit of air conditioner | |
| CN101915244A (en) | Through-flow fan of noise-reduction and air-enlargement volute tongue with convex table | |
| CN211119715U (en) | Air condensing units that blade apex is W type structure | |
| CN110410880A (en) | A kind of trailing edge is in the air-conditioner outdoor unit of microcellular structure | |
| CN110374920A (en) | A kind of air-conditioner outdoor unit of the V-shaped structure of blade tip | |
| CN207420973U (en) | Air conditioner, axial flow blower and its air passage | |
| CN202914378U (en) | Centrifugal fan impeller for air cooling refrigerators | |
| CN2596250Y (en) | Split insert type air conditioner indoor machine | |
| CN207437438U (en) | Tubular wine wheel and air conditioner | |
| CN207945739U (en) | Cabinet air-conditioner and air conditioner | |
| CN207945738U (en) | Cabinet air-conditioner and air conditioner | |
| CN110410881A (en) | A kind of trailing edge is in the air-conditioner outdoor unit of broached-tooth design |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200910 Address after: 201306 No. 300, SHUIHUA Road, Pudong New Area, Shanghai Co-patentee after: Yuan Jun of the Dynasty Patentee after: SHANGHAI DIANJI University Address before: 830091 Nanchang road the Xinjiang Uygur Autonomous Region Urumqi shayibake District No. 236 Patentee before: Yuan Jun of the Dynasty |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200728 Termination date: 20210829 |