CN110617553A - Volute tongue structure of through-flow air duct, air duct system and air conditioner indoor unit - Google Patents
Volute tongue structure of through-flow air duct, air duct system and air conditioner indoor unit Download PDFInfo
- Publication number
- CN110617553A CN110617553A CN201911049308.4A CN201911049308A CN110617553A CN 110617553 A CN110617553 A CN 110617553A CN 201911049308 A CN201911049308 A CN 201911049308A CN 110617553 A CN110617553 A CN 110617553A
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- China
- Prior art keywords
- fan
- volute tongue
- air duct
- cross
- flow
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0025—Cross-flow or tangential fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
- F24F1/0057—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in or on a wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/081—Air-flow control members, e.g. louvres, grilles, flaps or guide plates for guiding air around a curve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the field of air conditioning equipment, and particularly discloses a volute tongue structure of a through-flow air duct, an air duct system and an indoor unit of an air conditioner. By adopting the invention, the gap change between the windward side of the volute tongue and the outer contour of the fan is designed to be gradually reduced along the airflow flowing direction to form a gradual change channel, the size of an eccentric vortex in the fan is reduced, and the impact of the airflow is gradually differentiated and slowed down so as to adapt to the change of the airflow driven by the fan when the airflow returns to the inner side of the air duct from the windward side of the volute tongue, so that the airflow stably returns to the inner side of the air duct, the disturbance to the operation of the fan is reduced, the airflow of the fan is stable, the stability of the airflow is kept particularly when the resistance is increased (namely when a filter screen and a dirty heat exchanger are blocked), and the abnormal noise generated by the fluctuation of.
Description
Technical Field
The invention relates to the field of air conditioning equipment, in particular to a volute tongue structure of a through-flow air duct, an air duct system and an air conditioner indoor unit.
Background
The existing indoor unit of the household air conditioner comprises a machine body, an air duct system, a heat exchanger, a fan, a swing blade and a transverse air plate. The outdoor unit compressor compresses refrigerant to form low-temperature gas, the low-temperature gas flows into the evaporator, the fan drives the airflow to exchange heat through the heat exchanger, and the low-temperature gas is discharged into a room through outlet components such as the swing blades and the transverse plate, so that the purposes of adjusting the indoor temperature and improving the environment are achieved. In the prior art, the gap between the fan and the volute tongue is unchanged, the size of an eccentric vortex in the fan is large, and the airflow stability is poor, so that the air inlet of the fan is not smooth, the air outlet quantity of an air outlet is reduced, the air speed distribution is not uniform, and the chirping sound or the sudden and small air-breathing wind sound of an indoor unit is induced. The sound is uncomfortable to sound, particularly at night, the hearing comfort of customers is greatly reduced, and the sound is one of more faults complained by the customers in recent years.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the volute tongue structure of the cross-flow air channel, the air channel system and the indoor unit of the air conditioner are high in airflow stability and capable of reducing noise.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a volute tongue structure of a through-flow air duct, which comprises a volute tongue body, wherein a windward surface and an air guide surface are arranged on the volute tongue body, the through-flow air duct also comprises a fan, and a gap between the windward surface and the outer contour of the fan is gradually reduced along the airflow flowing direction.
As a preferred scheme of the volute tongue structure of the through-flow air duct, the windward surface and the air guide surface are in transition through an arc surface, the air guide surface is a plane, and the windward surface is an inwards concave curved surface.
Further, the ratio of the cross-sectional circular arc curvature radius R1 of the concave curved surface to the circumferential radius R0 of the fan is constant.
Furthermore, the ratio of the curvature radius R1 of the arc of the cross section of the concave curved surface to the circumferential radius R0 of the fan is 0.7-1.
Furthermore, the ratio of the curvature radius R1 of the section arc of the concave curved surface to the circumferential radius R0 of the fan is 0.7-0.8.
Further, the minimum gap between the windward side and the outer contour of the fan is 3-5 mm, and the maximum gap between the windward side and the outer contour of the fan is 1.5-2.5 times of the minimum gap.
Furthermore, the maximum clearance between the windward side and the outer contour of the fan is 1.8-2.2 times of the minimum clearance.
The invention provides an air duct system, which comprises a volute, a fan and a volute tongue structure of the cross-flow air duct, wherein the fan is arranged in the volute, the volute tongue structure of the cross-flow air duct is arranged on the volute and positioned at the air outlet side of the fan, and the windward side of the volute tongue structure of the cross-flow air duct is opposite to the fan.
As a preferable scheme of the air duct system, the fan is a cross-flow fan, and a volute tongue structure of the cross-flow air duct is arranged in parallel to the axial direction of the cross-flow fan.
The invention provides an indoor unit of an air conditioner, which comprises a machine body, wherein an air duct system is arranged in the machine body.
Compared with the prior art, the volute tongue structure of the through-flow air duct provided by the invention has the beneficial effects that:
according to the embodiment of the invention, the gap change between the windward side of the volute tongue and the outer contour of the fan is designed to be gradually reduced along the airflow flowing direction to form a gradual change channel, the size of an eccentric vortex in the fan is reduced, and the impact of the airflow is gradually differentiated and slowed down so as to adapt to the change of the airflow driven by the fan when the airflow returns to the inner side of the air channel from the windward side of the volute tongue, so that the airflow smoothly returns to the inside of the air channel, the disturbance to the operation of the fan is reduced, the airflow of the fan is stable, the stability of the airflow is maintained particularly when the resistance is increased (namely when a filter screen and a heat exchanger are blocked), and abnormal noise generated due to airflow fluctuation is.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be 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 only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a volute tongue structure of a cross-flow duct according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a duct system according to an embodiment of the present invention;
in the figure, 1, a volute tongue body; 11. the windward side; 12. an air guide surface; 13. a circular arc surface; 2. a volute; 3. a fan.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "central", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., used herein are used in the orientation or positional relationship indicated in the drawings, which are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be understood that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, either fixedly connected, detachably connected, or integrally connected, unless otherwise explicitly stated or limited; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings 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, a volute tongue structure of a cross-flow duct provided in an embodiment of the present invention includes a volute tongue body 1, a windward surface 11 and an air guide surface 12 are disposed on the volute tongue body 1, the cross-flow duct further includes a fan 3, and a gap between the windward surface 11 and an outer contour of the fan 3 is gradually reduced along an airflow flowing direction.
Therefore, in the embodiment of the invention, the change of the gap between the windward surface 11 of the volute tongue and the outer contour of the fan 3 is designed to be gradually reduced along the airflow flowing direction to form a gradual change channel, so that the size of an eccentric vortex in the fan is reduced, and the impact of the airflow is gradually differentiated and slowed down to adapt to the change of the airflow driven by the fan when the airflow returns to the inner side of the air duct from the windward surface 11 side of the volute tongue, so that the airflow smoothly returns to the inside of the air duct, the disturbance to the operation of the fan is reduced, the airflow of the fan is stable, the stability of the airflow is kept particularly when the resistance is increased (namely when a filter screen and a heat exchanger are dirty and blocked), and the abnormal noise caused by the.
Illustratively, the windward side 11 and the air guide side 12 are transited by an arc surface 13, the air guide side 12 is a plane, and the windward side 11 is an inward concave curved surface. Due to the design, a gradual change channel between the windward side 11 of the volute tongue and the outer contour of the fan 3 can be smoother, the air flow transition is more natural and smooth, and the purpose of further improving the air flow stability of the fan is achieved.
In specific implementation, when the gap between the windward side 11 and the outer contour of the fan 3 is considered to be too large, return air is easily increased due to airflow at a low rotating speed of the fan 3, and the flow loss of the wind guide side is caused; when the clearance between the windward side 11 and the outer contour of the fan 3 is too small, the eddy noise generated by the airflow is significantly increased. Therefore, the ratio of the curvature radius R1 of the section arc of the concave curved surface to the circumference radius R0 of the fan 3 is constant, and the constant ratio is selected from 0.7 to 1, preferably 0.7 to 0.8; the minimum clearance d2 between the windward side 11 and the outer contour of the fan 3 is 3 mm-5 mm, and the maximum clearance d1 between the windward side 11 and the outer contour of the fan 3 is 1.5-2.5 times, preferably 1.8-2.2 times of the minimum clearance d 2.
As shown in fig. 2, an air duct system according to an embodiment of the present invention includes a volute 2, a fan 3, and a volute tongue structure of a cross-flow duct, where the fan 3 is installed in the volute 2, the volute tongue structure of the cross-flow duct is disposed on the volute 2 and located on an air outlet side of the fan 3, and a windward surface 11 of the volute tongue structure of the cross-flow duct is disposed opposite to the fan 3. The fan 3 is a cross-flow fan, and a volute tongue structure of the cross-flow air channel is arranged in parallel to the axial direction of the cross-flow fan. Since the air duct system comprises the volute tongue structure of the through-flow air duct, all the advantages of the volute tongue structure of the through-flow air duct are achieved, and no description is made herein.
Further, the embodiment of the invention also provides an air conditioner indoor unit, which comprises a unit body, wherein the air duct system is arranged in the unit body. Since the air conditioner indoor unit comprises the air duct system, all the advantages of the air duct system are achieved, and the description is omitted here. Further, it is more preferable that the machine body is a wall-hanging type. Namely, the indoor unit of the air conditioner is a wall-mounted indoor unit.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. The volute tongue structure of the through-flow air duct is characterized by comprising a volute tongue body, wherein a windward surface and an air guide surface are arranged on the volute tongue body, the through-flow air duct further comprises a fan, and a gap between the windward surface and the outer contour of the fan is gradually reduced along the airflow flowing direction.
2. The volute tongue structure of a cross-flow duct of claim 1, wherein the wind-facing surface and the wind-guiding surface are transited by an arc surface, the wind-guiding surface is a plane surface, and the wind-facing surface is a concave curved surface.
3. The volute tongue structure of a through-flow duct according to claim 2, wherein the ratio of the radius of curvature R1 of the arc of the cross section of the concave curved surface to the radius R0 of the circumference of the fan is constant.
4. The volute tongue structure of a through-flow duct according to claim 3, wherein the ratio of the radius of curvature R1 of the arc of the cross section of the concave curved surface to the radius R0 of the circumference of the fan is 0.7-1.
5. The volute tongue structure of a cross-flow duct of claim 4, wherein the ratio of the radius of curvature R1 of the arc of the cross section of the concave curved surface to the radius R0 of the circumference of the fan is 0.7-0.8.
6. The volute tongue structure of the through-flow duct according to claim 1, wherein the minimum clearance between the windward side and the outer contour of the fan is 3mm to 5mm, and the maximum clearance between the windward side and the outer contour of the fan is 1.5 to 2.5 times of the minimum clearance.
7. The volute tongue structure of the cross-flow duct of claim 6, wherein the maximum clearance between the windward side and the outer profile of the fan is 1.8-2.2 times of the minimum clearance.
8. An air duct system, characterized by comprising a volute, a fan and the volute tongue structure of the cross-flow duct according to any one of claims 1 to 7, wherein the fan is installed in the volute, the volute tongue structure of the cross-flow duct is arranged on the volute and positioned at the air outlet side of the fan, and the windward side of the volute tongue structure of the cross-flow duct is arranged opposite to the fan.
9. The air duct system according to claim 8, wherein the fan is a cross-flow fan, and the volute tongue structure of the cross-flow duct is arranged parallel to an axial direction of the cross-flow fan.
10. An indoor unit of an air conditioner, comprising a body, wherein the air duct system as claimed in claim 8 or 9 is provided in the body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911049308.4A CN110617553A (en) | 2019-10-30 | 2019-10-30 | Volute tongue structure of through-flow air duct, air duct system and air conditioner indoor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911049308.4A CN110617553A (en) | 2019-10-30 | 2019-10-30 | Volute tongue structure of through-flow air duct, air duct system and air conditioner indoor unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110617553A true CN110617553A (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911049308.4A Pending CN110617553A (en) | 2019-10-30 | 2019-10-30 | Volute tongue structure of through-flow air duct, air duct system and air conditioner indoor unit |
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| CN (1) | CN110617553A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216109A (en) * | 2021-05-10 | 2021-08-06 | 国家海洋局北海环境监测中心 | Air charging device for floating barrel of oil containment boom for recovering spilled oil on sea surface |
-
2019
- 2019-10-30 CN CN201911049308.4A patent/CN110617553A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216109A (en) * | 2021-05-10 | 2021-08-06 | 国家海洋局北海环境监测中心 | Air charging device for floating barrel of oil containment boom for recovering spilled oil on sea surface |
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