CN109237779B - Air duct structure of warm air blower and wall-mounted warm air blower - Google Patents
Air duct structure of warm air blower and wall-mounted warm air blower Download PDFInfo
- Publication number
- CN109237779B CN109237779B CN201811312944.7A CN201811312944A CN109237779B CN 109237779 B CN109237779 B CN 109237779B CN 201811312944 A CN201811312944 A CN 201811312944A CN 109237779 B CN109237779 B CN 109237779B
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- air
- duct
- wall
- air outlet
- heater
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- 208000030303 breathing problems Diseases 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005485 electric heating Methods 0.000 description 4
- 206010013975 Dyspnoeas Diseases 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 208000032170 Congenital Abnormalities Diseases 0.000 description 1
- 208000000059 Dyspnea Diseases 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
- F24H3/0411—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between for domestic or space-heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0052—Details for air heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1863—Arrangement or mounting of electric heating means
- F24H9/1872—PTC
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H2250/00—Electrical heat generating means
- F24H2250/04—Positive or negative temperature coefficients, e.g. PTC, NTC
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Direct Air Heating By Heater Or Combustion Gas (AREA)
Abstract
The utility model provides an air duct structure of a warm air blower and a wall-mounted warm air blower, wherein the air duct structure comprises a volute; an air outlet duct is arranged in the volute; a boss structure is arranged on the inner wall of the air outlet duct; according to the scheme provided by the utility model, the wind resistance of the air outlet can be effectively reduced, the air speed of the air outlet is more uniform, the phenomenon of countercurrent air suction of local air flow is avoided, and the generation of air surge is avoided; the scheme provided by the utility model has the advantages that the air duct structure is simple and reliable, the air duct air-breathing problem can be effectively solved, and the use comfort of the air heater is improved.
Description
Technical Field
The utility model belongs to the technical field of warm air blowers, and particularly relates to an air duct structure of a warm air blower and a wall-mounted warm air blower.
Background
At present, an electric heater is a necessary living article for heating people in winter, and in the field of household electric heaters, a wall-mounted electric heater is commonly used, the electric heater adopts PTC (ceramic electric heating) as an electric heating element, and a motor drives a through-flow fan blade to force air flow to flow through the PTC for heat exchange, so that the purpose of heating by outputting hot air is achieved.
Because the PTC of the wall-mounted fan heater is used as the only heating source, the power is larger, the maximum power can reach more than 2000W, the heating value is large, and the surface temperature is high, so that the PTC design position is at an air outlet instead of an air inlet (the PTC of the wall-mounted air conditioner is used as electric auxiliary heat, the power is smaller and is designed at the air inlet), the wall-mounted fan heater is directly caused to have congenital defects, the air resistance of the air outlet is large, the air speed of the air outlet is uneven, the air flow counter-current air suction phenomenon occurs locally, and the air-breathing problem is generated.
In the prior art, the utility model patent with the Chinese patent number of CN204227642U discloses a through-flow air duct assembly, which comprises a first volute and a second volute which are combined to form an air duct for guiding air flow, wherein at least one inwardly protruding air guide structure is arranged on the inner surface of the first volute and/or the second volute, which is used for limiting the air duct, and the air guide structure extends along the vertical direction as a whole; according to the air guide structure, the air guide structure is arranged to adjust the direction of airflow flowing through the air duct, so that the airflow is prevented from generating vortex and turbulent flow which are easy to cause unstable air outlet and abnormal sound in the air duct, the air outlet noise is reduced, the air outlet tone quality is improved, and the effect of improving the use comfort of a user is achieved; however, after the noise is reduced as a whole, the noise of the whole machine is exposed, and particularly, the air duct breathing sound appears obvious, the tone quality is poor, and the feeling of dyspnea is provided.
Based on the technical problems existing in the fan heater air duct structure, no related solution exists yet; there is therefore an urgent need to seek an effective solution to the above problems.
Disclosure of Invention
The utility model aims at overcoming the defects in the prior art, and provides an air duct structure of a warm air blower and a wall-mounted warm air blower, aiming at solving the problem of air blowing of the air duct of the conventional warm air blower.
The utility model provides an air duct structure of a warm air blower, which comprises a volute; an air outlet duct is arranged in the volute; the inner wall of the air outlet duct is provided with a boss structure.
Further, the device also comprises a heater; the heater is arranged at an air outlet of the air outlet duct in the volute; the boss structure is arranged on the inner wall of the air outlet duct and is positioned on the inner side of the heat exchanger.
Further, the distance between the boss structure and the heater is L; the width of the heater is H; l and H satisfy: h/2< L <2H.
Further, the boss structure protrudes from the inner wall to a height h; the width of the heater is H; h and H satisfy: h/15< H < H/3.
Further, H and H satisfy: h=h/10.
Further, the fan also comprises a cross-flow fan blade; the cross-flow fan blade is arranged at the air inlet of the air inlet duct in the volute.
Further, the heater is a PTC.
Further, the boss structure is arranged on the bottom of the inner wall of the air outlet duct.
Correspondingly, the utility model also provides a wall-mounted warm air blower, which comprises a machine body; an air duct structure is arranged in the machine body, and the air duct structure is the air duct structure of the warm air blower.
Further, the device also comprises a front panel and a rear panel; the boss structure is arranged on the inner wall of the air outlet duct and is positioned on one side close to the rear panel.
According to the scheme provided by the utility model, the wind resistance of the air outlet can be effectively reduced, the air speed of the air outlet is more uniform, the phenomenon of countercurrent air suction of local air flow is avoided, and the generation of air surge is avoided; the scheme provided by the utility model has the advantages that the air duct structure is simple and reliable, the air duct air-breathing problem can be effectively solved, and the use comfort of the air heater is improved.
Drawings
The utility model will be described in further detail with reference to the drawings and the detailed description.
The utility model will be further described with reference to the accompanying drawings in which:
fig. 1 is a front view of a wall-mounted fan heater according to the present utility model;
fig. 2 is a bottom view of a wall-mounted fan heater according to the present utility model;
FIG. 3 is a top view of a wall mounted fan heater according to the present utility model;
FIG. 4 is a right side view of a wall mounted fan heater according to the present utility model;
fig. 5 is a left side view of a wall-mounted fan heater according to the present utility model;
FIG. 6 is a schematic diagram of a fan heater duct structure in the prior art;
FIG. 7 is a schematic diagram of an air duct of a fan heater according to the present utility model;
FIG. 8 is an enlarged schematic view of portion C of FIG. 7;
FIG. 9 is a diagram showing the simulated effect of the air flow in the air duct structure of a fan heater according to the prior art;
FIG. 10 is a diagram showing the simulated effect of the air flow in the air duct structure of the fan heater according to the present utility model;
FIG. 11 is a diagram showing the simulation effect of the air flow of the air duct structure of the fan heater according to the present utility model.
In the figure: 10. a body; 11. a front panel; 12. a rear panel; 13. through-flow fan blades; 14. a volute; 15. PCT; 16. an air outlet grille; 17. a boss structure; 18. vortex flow; 20. an air inlet; 30. and an air outlet.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 7 to 8, the present utility model provides a fan heater air duct structure, which includes a volute 14; an air outlet duct is arranged in the volute 14; a boss structure 17 is arranged on the inner wall of the air outlet duct; specifically, the boss structure 17 is disposed on the bottom a of the inner wall of the air outlet duct, and the specific shape of the boss structure 17 is not limited, and the boss structure is distributed on the bottom of the rear casing duct of the whole volute casing 14 along the length direction of the fan blade; the top part b of the inner wall of the air outlet duct can be directly fixed in the shell of the warm air blower; further, the device also comprises a cross-flow fan blade 13; the cross-flow fan blade 13 is arranged at an air inlet of an air inlet channel in the volute 14; by adopting the air duct structure of the warm air blower, vortex movement is effectively prevented, air flow is stabilized, and the air duct air-blowing problem of the air duct is effectively solved compared with the air duct structure of the traditional warm air blower.
Preferably, in combination with the above solution, as shown in fig. 7 to 8, in this embodiment, the fan heater duct structure further includes a heater; specifically, the heater is PTC 15; the PTC 15 is arranged at an air outlet of the air outlet duct in the volute 14, and the boss structure is arranged on the inner wall of the air outlet duct and positioned at the inner side of the heat exchanger; specifically, the distance of the boss structure 17 from the PTC 15 is L; the width of PTC 15 is H; l and H satisfy: h/2< L <2H; preferably, L and H satisfy: l=h; specifically, as shown in fig. 8, the PTC width value is set to H, and the key size of the above-mentioned air duct boss structure 17 is as follows: the highest point of the boss structure 17 is provided with a certain height value H relative to the lowest point (inner wall), the H is in a certain range, the larger the H value is, the better the anti-breathing effect is, the smaller the H value is, the larger the air quantity loss is, the optimal value exists in a certain range according to the H value, namely the H value is set at H/10; generally, the range H/15< H < H/3 that the value of the anti-gasping structure H needs to meet can meet the air duct gasping problem.
Preferably, in combination with the above solution, as shown in fig. 7 to 8, in this embodiment, the fan heater duct structure further includes a heater; specifically, the heater is a PTC; the PTC 15 is arranged at an air outlet of the air outlet duct in the volute 14; the boss structure 17 protrudes from the inner wall to a height h; the width of PTC 15 is H; h and H satisfy: h/15< H < H/3; preferably, H and H satisfy: h=h/10; specifically, as shown in fig. 8, 10, and 11, the PTC width value is set to H, and the dimensions of the key positions of the air duct boss structure 17 are as follows: the distance value L of the boss vortex blocking surface relative to the PTC inner surface is within a certain range, and an optimal value exists, namely L=H is set; the range of the actual L needs to meet H/2< L <2H; the boss structure is designed in the air outlet area of the air duct, and the key size of the boss is that the height H is in the following range H/15< H < H/3, so that vortex movement is effectively blocked, and air-duct air-breathing is prevented.
Correspondingly, as shown in fig. 1 to 8, the utility model also provides a wall-mounted fan heater, which comprises a machine body 10; the top of the machine body 10 is provided with an air inlet 20, the bottom is provided with an air outlet 30, and an air channel structure is arranged in the machine body 10 and is the air channel structure of the warm air blower; the electric heater provided by the utility model adopts PTC (ceramic electric heating) as an electric heating element, and the motor drives the through-flow fan blade to force air flow to flow through the PTC for heat exchange, so that the purpose of outputting hot air for heating is achieved.
Preferably, in combination with the above, as shown in fig. 1 to 8, in the present embodiment, the body 10 further includes a front panel 11 and a rear panel 12; the boss structure 17 is arranged on the inner wall of the air outlet duct and is positioned on one side close to the rear panel 12, so that the air outlet duct of the machine body 10 is effectively reduced in air blowing, and the experience of the warm air blower is improved.
Preferably, in combination with the above scheme, as shown in fig. 1 to 8, the air duct in the volute of the air duct of the wall-mounted fan heater is divided into three areas, namely an air inlet area d, a rotating area e and an air outlet area f: as shown in fig. 7: the area surrounded by the front panel 11, the rear panel 12, the through-flow fan blades 13 and the volute casing 14 by taking the A, B position as a boundary line is generally called an ' air inlet area ', the through-flow fan blades are self-rotating areas ', and the area surrounded by the through-flow fan blades 13, the rear panel 12, the volute tongue 14 and the air outlet grille 16 is generally defined as an ' air outlet area ', wherein the PTC is positioned in the air outlet area; the PTC heater is the only heat source, and the design position is in the air outlet area of the air duct; the warm air blower provided by the utility model is based on low cost and simple structure, the PTC is the only heat source, and is designed at the air outlet to improve the heat dissipation efficiency, but the PTC heating plate has high density and high wind resistance; FIG. 9 shows the air flow state of the PTC air duct with the air outlet cancelled, the air quantity can reach 425m3/h, FIG. 10 shows the air duct in the industry at present, the air outlet is blocked by PTC, the air quantity is only 180m3/h, FIG. 11 shows the air duct structure provided by the utility model, in the air outlet area, the rear shell is designed with a boss structure at a key position away from PTC, and the air quantity is 168m3/h; the ratio of the air quantity of the three air duct structures is as follows: 2.52:1.07:1.00, namely the wind resistance is large after PTC is added to the air outlet, the air quantity loss is large, and the air quantity loss is weak after a boss is added to the air outlet area; as shown in fig. 10, in the current industry, because the PTC is blocked at the air outlet, airflow forms a certain range of vortex near the PTC at the bottom shell, and the vortex moves upward along the inner wall of the rear shell, and after being destroyed, the vortex produces a breathing noise; as shown in FIG. 11, with the air duct structure provided by the utility model, a boss structure (the shape is not limited) is designed at the key position of the air outlet area to have a key size so as to prevent vortex movement and avoid air-breathing after vortex damage; the specific effects are shown in the following table one.
List one
According to the scheme provided by the utility model, the wind resistance of the air outlet can be effectively reduced, the air speed of the air outlet is more uniform, the phenomenon of countercurrent air suction of local air flow is avoided, and the generation of air surge is avoided; the scheme provided by the utility model has the advantages that the air duct structure is simple and reliable, the air duct air-breathing problem can be effectively solved, and the use comfort of the air heater is improved.
The above description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the disclosed technology. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technology of the present utility model fall within the protection scope of the present utility model.
Claims (8)
1. The air duct structure of the warm air blower is characterized by comprising a volute; an air outlet duct is arranged in the volute; a boss structure is arranged on the inner wall of the air outlet air duct, a boss structure forms a boss opposite to the inner wall of the air outlet air duct, a boss starting point of the boss structure forms a step shape with the inner wall of the air outlet air duct along the air outlet direction, and a boss ending point of the boss structure also forms a step shape with the inner wall of the air outlet air duct; also comprises a heater; the heater is arranged at an air outlet of an air outlet duct in the volute; the boss structure is arranged on the inner wall of the air outlet duct and is positioned on the inner side of the heater; the highest point of the bulge of the boss structure has a certain height value h relative to the inner wall; the width of the heater is H; the H and the H satisfy: h/15< H < H/3; the distance between the boss structure and the heater is L; the L and the H satisfy: h/2< L <2H.
2. The warm-air drier duct structure according to claim 1, wherein the L and the H satisfy: l=h.
3. The warm-air drier duct structure according to claim 1, wherein the H and the H satisfy: h=h/10.
4. A fan heater duct structure as claimed in any one of claims 1 to 3, further comprising cross-flow fan blades; the through-flow fan blade is arranged at an air inlet of the air inlet duct in the volute.
5. The warm-air drier duct structure according to claim 1, wherein the heater is a PTC.
6. The warm-air drier air duct structure according to claim 1, wherein the boss structure is disposed on the bottom of the inner wall of the air outlet duct.
7. A wall-mounted warm-air drier comprises a machine body; an air duct structure is arranged in the machine body, and is characterized in that the air duct structure is the air duct structure of the warm air blower according to any one of claims 1 to 6.
8. The wall-mounted unit heater according to claim 7, further comprising a front panel and a rear panel; the boss structure is arranged on the inner wall of the air outlet duct and is positioned on one side close to the rear panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811312944.7A CN109237779B (en) | 2018-11-06 | 2018-11-06 | Air duct structure of warm air blower and wall-mounted warm air blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811312944.7A CN109237779B (en) | 2018-11-06 | 2018-11-06 | Air duct structure of warm air blower and wall-mounted warm air blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109237779A CN109237779A (en) | 2019-01-18 |
| CN109237779B true CN109237779B (en) | 2024-04-16 |
Family
ID=65077200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811312944.7A Active CN109237779B (en) | 2018-11-06 | 2018-11-06 | Air duct structure of warm air blower and wall-mounted warm air blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109237779B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112443967B (en) * | 2019-08-30 | 2021-11-02 | 广东美的环境电器制造有限公司 | Air supply device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022383A (en) * | 2009-09-11 | 2011-04-20 | 珠海格力电器股份有限公司 | Air-conditioner air duct device and air-conditioner |
| CN107166496A (en) * | 2017-06-30 | 2017-09-15 | 广东美的环境电器制造有限公司 | Ducting assembly and warm-air drier |
| CN206831783U (en) * | 2017-03-09 | 2018-01-02 | 青岛海尔空调器有限总公司 | Air outlet device for air conditioner |
| CN209027091U (en) * | 2018-11-06 | 2019-06-25 | 珠海格力电器股份有限公司 | A kind of warm-air drier air channel structure and wall-hanging-type warm-air machine |
-
2018
- 2018-11-06 CN CN201811312944.7A patent/CN109237779B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022383A (en) * | 2009-09-11 | 2011-04-20 | 珠海格力电器股份有限公司 | Air-conditioner air duct device and air-conditioner |
| CN206831783U (en) * | 2017-03-09 | 2018-01-02 | 青岛海尔空调器有限总公司 | Air outlet device for air conditioner |
| CN107166496A (en) * | 2017-06-30 | 2017-09-15 | 广东美的环境电器制造有限公司 | Ducting assembly and warm-air drier |
| CN209027091U (en) * | 2018-11-06 | 2019-06-25 | 珠海格力电器股份有限公司 | A kind of warm-air drier air channel structure and wall-hanging-type warm-air machine |
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| Publication number | Publication date |
|---|---|
| CN109237779A (en) | 2019-01-18 |
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