CN110553399B - Cross flow air duct assembly and fan heater - Google Patents
Cross flow air duct assembly and fan heater Download PDFInfo
- Publication number
- CN110553399B CN110553399B CN201910647540.1A CN201910647540A CN110553399B CN 110553399 B CN110553399 B CN 110553399B CN 201910647540 A CN201910647540 A CN 201910647540A CN 110553399 B CN110553399 B CN 110553399B
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- air
- impeller
- section
- volute
- air guide
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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
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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
- F24H9/00—Details
- F24H9/0052—Details for air heaters
- F24H9/0057—Guiding means
- F24H9/0063—Guiding means in air channels
Abstract
The invention relates to the technical field of daily electric appliances, in particular to a through-flow air duct assembly and a fan heater. The cross-flow air duct component comprises a shell, an impeller, an air guide volute tongue and an air guide volute, wherein the shell is provided with an air inlet, an air duct and an air outlet, the air inlet and the air outlet are respectively arranged on two opposite sides of the air duct and are communicated with the air duct, and the axis of the air inlet is parallel to the axis of the air outlet; the air guide volute and the air guide volute tongue are respectively arranged on two opposite sides of the air outlet, and a set distance is reserved between the air guide volute tongue and the impeller. The through-flow air duct component provided by the invention has the advantages of large air output and relatively high air speed.
Description
Technical Field
The invention relates to the technical field of daily electric appliances, in particular to a through-flow air duct assembly and a fan heater.
Background
As a household appliance with higher utilization rate, the popularization rate of the fan heater is higher and higher. The fan blades of the fan heater act under the driving of the motor, and air enters from the air inlet, is guided by the air duct and is finally blown out from the air outlet. The air duct of the existing fan heater is usually curved, air enters from one side of the air duct and can flow out from the air outlet after rotating 90 degrees or more than 90 degrees, the fan heater with the structure can generate certain adverse effect on the amount of the air, and the speed of the air is lost to a certain extent, so that the air volume and the air speed of the fan heater are relatively low.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the existing fan heater volute structure has certain defects, and the air quantity and the air speed of the fan heater are relatively low.
(II) technical scheme
In order to achieve the above technical problem, the present invention provides a cross-flow duct assembly, which includes: the air conditioner comprises a shell, a fan and a fan, wherein the shell is provided with an air inlet, an air duct and an air outlet, the air inlet and the air outlet are respectively arranged on two opposite sides of the air duct and are communicated with the air duct, and the axis of the air inlet is parallel to the axis of the air outlet;
the impeller is positioned in the air duct of the shell and is rotationally connected with the shell;
the air guide vortex tongue extends from the air outlet to the direction close to the impeller;
the air guide volute extends from the air outlet to the direction close to the impeller, the air guide volute and the air guide volute tongue are respectively arranged on two opposite sides of the air outlet, and a set distance is reserved between the air guide volute and the impeller.
Optionally, the diameter of the impeller is D, the minimum distance between the air guide volute tongue and the impeller is a, D/25 is not less than a and not more than D/14, the minimum distance between the air guide volute and the impeller is B, and D/25 is not less than B and not more than D/20.
Optionally, the air guide vortex tongue comprises an anti-backflow part and a main body part, the anti-backflow part is connected to one side, close to the impeller, of the main body part, the anti-backflow part is located at one end, far away from the air outlet, of the main body part, the anti-backflow part is opposite to the protruding arrangement of the main body part, and the distance between the anti-backflow part and the impeller is A.
Optionally, the backflow prevention portion is of a streamlined structure.
Optionally, the main body portion includes a volute tongue, a windward section and a blocking section, the backflow prevention portion is connected to the volute tongue, the volute tongue and the windward section are both arc-shaped structures, the volute tongue protrudes in a direction away from the impeller, the windward section protrudes in a direction away from the air guide volute, the volute tongue is connected with the blocking section through the windward section, and the blocking section is of a flat-plate-shaped structure.
Optionally, the volute tongue is connected with the windward section through a transition section, the transition section is of an arc-shaped structure, and the transition section protrudes towards a direction close to the impeller.
Optionally, the wind guide spiral case includes spiral case, wind guide section and air-out section, the spiral case with the wind guide section is the arc structure, just the spiral case is to keeping away from the direction protrusion of impeller, the wind guide section is to being close to the direction protrusion of impeller, the wind guide section to the spiral case passes through the wind guide section with the air-out section is connected, the air-out section is the flat structure.
Optionally, the minimum distance between the volute and the impeller is gradually increased along the direction close to the air guide section.
Optionally, the curvature of the windward section is greater than the curvature of the wind guiding section.
Optionally, the shell includes procapsid, well casing and back casing, the procapsid pass through well casing with back casing is connected, the procapsid has the air intake, back casing has the air outlet, the wind-guiding spiral case with the wind-guiding vortex tongue with clearance between the shell is intake side and air-out side respectively, and is relative the air-out side the impeller is closer to intake side, just the axle center of impeller with the procapsid with the interval between the axle central line of back casing is F, and 0 < F is less than or equal to D/7.
Based on any one of the cross-flow air duct components, the second aspect of the invention also provides a fan heater, which comprises a heating piece and any one of the cross-flow air duct components, wherein the heating piece is installed on the inner side of the air outlet.
Optionally, the minimum distance between the impeller and the heat generating member is greater than or equal to 30 mm.
(III) advantageous effects
In the through-flow air duct component provided by the invention, the air inlet and the air outlet are respectively arranged at two opposite sides of the air duct, and the axis of the air inlet and the axis of the air outlet are parallel to each other, so that in the working process of the through-flow air duct component, air enters from the air inlet under the action of the impeller, is influenced by the flow guiding effects of the air guiding volute and the air guiding volute tongue, and is finally blown out from the air outlet to form a straight-in and straight-out airflow movement mode.
Drawings
The advantages of the above and/or additional aspects of the present invention will become apparent and readily appreciated from the following description of the embodiments taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a warm air blower provided in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a cross-flow duct assembly provided by an embodiment of the invention.
Reference numerals
1-a housing;
11-a front housing;
111-air inlet;
12-a middle shell;
121-air duct;
13-a rear housing;
131-an air outlet;
2-an impeller;
3-wind guiding vortex tongue;
31-a body portion;
311-vortex tongue;
312-windward section;
313-a barrier segment;
314-a transition section;
32-backflow prevention part;
4-wind guiding volute;
41-a volute;
42-air guiding section;
43-air outlet section;
5-heating element.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
As shown in fig. 2, the present invention provides a through-flow air duct assembly, which includes a housing 1, an impeller 2, an air guide volute tongue 3 and an air guide volute 4, wherein the housing 1 has an air inlet 111, an air duct 121 and an air outlet 131, the impeller 2, the air guide volute tongue 3 and the air guide volute 4 are all installed in the air duct 121, the air inlet 111 and the air outlet 131 are all communicated with the air duct 121, so as to form a gas flow channel, the air inlet 111 and the air outlet 131 are respectively disposed at two opposite sides of the air duct 121, and an axis of the air inlet 111 and an axis of the air outlet 131 are parallel to each other; the air guide volute tongue 3 and the air guide volute 4 both extend from the air outlet 131 to the direction close to the impeller 2, the air guide volute tongue 3 and the air guide volute 4 are respectively arranged on two opposite sides of the air outlet 131, and a set distance is reserved between the air guide volute tongue 3 and the impeller 2, so that it is ensured that air can flow from the air inlet 111 to the air outlet 131 through the air duct 121, and a through air passage is formed.
Specifically, the housing 1, the air guide volute tongue 3 and the air guide volute 4 can be made of hard materials such as metal, and the sizes of the three materials can be determined according to actual conditions. The housing 1 may be a drum-shaped structure, that is, two opposite sides thereof may be flat-plate-shaped structures, and is respectively provided with an air inlet 111 and an air outlet 131; the middle part can be a round or arc structure, the air channel 121 is arranged inside the middle part, and the impeller 2, the air guide volute tongue 3 and the air guide volute 4 are installed; of course, the housing 1 may also have a square structure, which is not limited herein. The number of the cross-flow fan blades on the impeller 2 can be selected according to actual conditions, two axial ends of the cross-flow fan blades are rotatably connected to the shell 1, and optionally, a rotating shaft of the impeller 2 can be mounted on the shell 1 through a bearing and other components. The structure of the wind guide volute 4 and the wind guide volute tongue can be both arc structures, so that the obstruction of the wind guide volute tongue 3 and the wind guide volute 4 to the flow of gas is reduced, the wind guide volute 4 and the wind guide volute tongue 3 can be both plate structures, namely as shown in fig. 1 and 2, the structures of the wind guide volute 4 (and the wind guide volute tongue 3) cut by planes which are perpendicular to the axis of the impeller 2 at will are the same, and therefore it is guaranteed that the wind guide volute tongue 3 and the wind guide volute 4 can generate the same flow guide effect on any position of the impeller 2 in the axial direction of the impeller 2. The more specific configurations of the air guide scroll tongue 3 and the air guide scroll case 4 are not limited herein.
As described above, in the cross flow air duct assembly provided by the present invention, the air inlet 111 and the air outlet 131 are respectively disposed at two opposite sides of the air duct 121, and the axis of the air inlet 111 and the axis of the air outlet 131 are parallel to each other, so that in the working process of the cross flow air duct assembly, air enters from the air inlet 111 under the action of the impeller 2, is influenced by the flow guiding effects of the air guiding volute 4 and the air guiding volute tongue 3, and is finally blown out from the air outlet 131 to form a straight-in and straight-out airflow movement mode.
Further, as shown in fig. 1 and 2, the diameter of the impeller 2 is D, the minimum distance between the air guide volute tongue 3 and the impeller 2 is a, and the minimum distance between the air guide volute 4 and the impeller 2 is B, in order to further reduce the backflow amount in the cross flow duct assembly, it is preferable that D/25 is not less than a and not more than D/14, and D/25 is not less than B and not more than D/20, and by optimizing the distance between the air guide volute tongue 3 and the air guide volute 4 and the impeller 2, the backflow of the air flow between the impeller 2 and the volute tongue 311 can be reduced. Specifically, as shown in fig. 2, the impeller 2 rotates clockwise, and the interval between the air guide scroll tongue 3 and the air guide scroll casing 4 and the impeller 2 is optimized, so that it is possible to prevent a large amount of gas from flowing from the gap between the air guide scroll tongue 3 and the impeller 2 to the direction of the air inlet 111 in the process of flowing from the gap between the impeller 2 and the air guide scroll casing 4 to the air outlet 131.
Further, as shown in fig. 1 and 2, the air guide scroll tongue 3 may include a backflow prevention part 32 and a main body part 31, the backflow prevention part 32 is connected to a side of the main body part 31 close to the impeller 2, the backflow prevention part 32 is located at an end of the main body part 31 far from the air outlet 131, and the backflow prevention part 32 is protrudingly disposed with respect to the main body part 31. In this case, by additionally providing the backflow prevention portion 32 and minimizing the distance between the backflow prevention portion 32 and the impeller 2, on one hand, the gas flow space clamped between the whole air guide volute tongue 3 and the impeller 2 is not reduced too much, and on the other hand, a good blocking effect can be generated on the backflow gas, so that the backflow phenomenon is prevented from being generated due to the movement of the gas from the air outlet 131 to the direction of the air inlet 111 under the action of the conditions such as air pressure, and a large adverse effect is generated on the normal operation of the cross-flow air duct assembly. Therefore, the distance between the backflow prevention unit 32 and the impeller 2 is a.
Specifically, the shape of the backflow prevention part 32 may be determined according to actual conditions, the size of the backflow prevention part 32 in the direction perpendicular to the direction a may be determined according to the size ratio of the air guide volute tongue 3 and the impeller 2, and the size of the backflow prevention part 32 may be relatively small, so as to ensure that the backflow prevention part 32 can maintain a stable relatively fixed relationship with the main body part 31 even when being acted by force generated by gas flow for a long time, and further, the backflow prevention part 32 may be formed integrally with the main body part 31, which may further ensure that the backflow prevention part and the main body part 31 have high connection strength therebetween.
Preferably, the backflow prevention part 32 may have a streamline structure, in which case the gas is less obstructed by the backflow prevention part 32, so that the amount of resistance generated by the gas flowing along the backflow prevention part 32 may be further reduced. In addition, in the working process of the through-flow air channel assembly, due to the movement of air, the air impacts the surface of the air guide volute tongue 3, certain noise is inevitably generated, the surface of the air guide volute tongue 3 is of an anisotropic structure by arranging the backflow preventing part 32, and further when the air impacts the surface of the air guide volute tongue 3, the surfaces of the backflow preventing part 32 and the main body part 31 can disperse the force generated by the flowing air, and the air is reflected to different directions, so that the sharpness of the noise is reduced; meanwhile, the uneven surface of the air guide vortex tongue 3 can disperse the distribution of airflow pressure, and the noise generated by the airflow is reduced. Specifically, the surface of the backflow prevention portion 32 may be a structure formed by connecting a plurality of arc lines, or it may also be a streamline structure such as an arc structure.
Further, as shown in fig. 1 and 2, the main body 31 may include a vortex tongue 311, a windward section 312 and a blocking section 313, the backflow prevention portion 32 is connected to the vortex tongue 311, and both the vortex tongue 311 and the windward section 312 are of an arc structure, so as to reduce the blocking effect of the vortex tongue 311 and the windward section 312 on the gas and improve the guiding effect on the gas; the volute tongue 311 protrudes in the direction far away from the impeller 2, the windward section 312 protrudes in the direction far away from the air guide volute 4, and the windward section 312 forms an air accommodating area, and because the gap between the backflow prevention part 32 and the impeller 2 is relatively small, air is not easy to flow back from the windward section 312 to an area where the volute tongue 311 is located, so that the backflow amount of air in the working process of the through-flow air channel assembly can be further reduced; the vortex tongue 311 is connected with the blocking section 313 through the windward section 312, the blocking section 313 is opposite to the air outlet section 43, the blocking section 313 is of a flat plate structure, a certain blocking effect can be provided for the air under the action of the blocking section 313, the air gradually has the trend of movement in the extending direction of the blocking section 313, the blocking section 313 is of a flat plate structure, and then the movement direction of the flowing air can be linear.
Specifically, the vortex tongue 311, the windward section 312 and the blocking section 313 may be formed in an integrally formed manner to improve the connection strength therebetween, and meanwhile, the three are formed in an integrally formed manner, so that the obstruction of the connection portion between any two of the vortex tongue 311, the windward section 312 and the blocking section 313 may be reduced, that is, the smooth transition is performed between any two of the three. The blocking section 313 and the outer shell 1 can be fixedly connected by welding or the like.
Considering that the vortex tongue 311 and the windward section 312 are both arc-shaped structures and the protruding directions of the two are the same, in order to further reduce the large resistance to the gas at the connection between the vortex tongue 311 and the windward section 312, preferably, the vortex tongue 311 and the windward section 312 may be connected by a transition section 314, the transition section 314 is an arc-shaped structure, and the transition section 314 protrudes toward the direction close to the impeller 2, so as to further reduce the blocking effect of the wind-guiding vortex tongue 3 on the gas. Specifically, the transition section 314 may also be integrally formed with the vortex tongue 311, the windward section 312 and the blocking section 313 by changing the corresponding shape of the mold.
Further, the air guide volute 4 comprises a volute 41, an air guide section 42 and an air outlet section 43, the volute 41 and the air guide section 42 are both arc-shaped structures, the volute 41 protrudes towards the direction far away from the impeller 2, and the air guide section 42 protrudes towards the direction close to the impeller 2, so that in the rotation process of the impeller 2, the guiding effect of the surface of the air guide volute 4 on gas can be further improved. Meanwhile, the wind guide section 42 is connected with the wind outlet section 43 through the wind guide section 42 towards the volute 41, the wind outlet section 43 is of a flat plate structure, and the wind outlet section 43 is of a flat plate structure, so that the gas to be blown out from the wind outlet 131 can flow along the wind outlet section 43 of the flat plate structure firstly, the gas has a tendency of moving along a straight line, the gas blown out from the wind outlet 131 is ensured to flow along the straight line, and the gas flowing out from the wind outlet 131 can be more concentrated under the combined action of the wind guide part and the blocking section 313, and the wind outlet effect is better.
Specifically, the volute 41, the air guiding section 42 and the air outlet section 43 can be formed in an integrated manner, so that the connection strength between the three can be relatively high, the blocking effect on the air at the connection position between any adjacent two of the volute 41, the air guiding section 42 and the air outlet section 43 can be reduced as far as possible, and the overall air guiding effect of the air guiding volute 4 is further improved. Preferably, along the direction close to the air guiding section 42, the minimum distance between the volute 41 and the impeller 2 can be gradually increased, so as to further increase the air output, and by changing the distance between different positions of the volute 41 and the impeller 2, the noise generated by dynamic and static interference between the air and the impeller 2 can be reduced.
To further reduce the amount of backflow created during operation of the through-flow duct assembly, it may be preferable to provide a greater curvature for windward section 312 than for air deflection section 42. As described above, the windward section 312 itself can form a gas containing area, and the curvature of the windward section 312 is greater than the curvature of the wind guiding section 42, so that on one hand, the capacity of the gas containing area can be increased, and the total amount of gas that can be stored in the area can be increased, and on the other hand, the difficulty that gas flows from the area to the gap between the volute tongue 311 and the impeller 2 can be increased, and in addition, in the process that gas flows along the wind guiding section 42, the gas in the gas containing area can be driven to flow to the air outlet 131 to a certain extent, and in sum, the total amount of backflow gas generated in the working process of the cross-flow air duct assembly can be further reduced, and the overall performance of the whole cross-flow air duct assembly can be improved. Specifically, the curvatures of the windward section 312 and the air guide section 42 can be determined according to the radian, the diameter and other factors of the windward section 312 and the air guide section 42, and those skilled in the art can determine the curvatures of the windward section 312 and the air guide section 42 according to specific conditions in the actual production process.
Further, as shown in fig. 1, the housing 1 may include a front housing 11, a middle housing 12 and a rear housing 13, the front housing 11 is connected to the rear housing 13 through the middle housing 12, the three are enclosed to form an air duct 121, the air inlet 111 is disposed on the front housing 11, the air outlet 131 is disposed on the rear housing 13, and gaps between the air guiding volute 4 and the air guiding volute tongue 3 and the housing 1 are an air inlet side and an air outlet side, respectively, in order to further increase the air output of the whole cross-flow air duct assembly under the condition of not changing the power of the impeller 2, preferably, the impeller 2 may be closer to the air inlet side than the air outlet side, in this case, the distance between the impeller 2 and the air guiding volute tongue 3 may be increased, and further, the total amount of air entering the air guiding volute tongue 3 is increased, and finally, the air output is increased. In order to prevent the position of the impeller 2 from being excessively deviated, it is preferable that a distance between the axis of the impeller 2 and the axial center lines of the front casing 11 and the rear casing 13 is F, and F is greater than 0 and less than or equal to D/7, in this case, although the whole cross-flow duct assembly is an eccentric structure, the stability of the whole machine during operation is not substantially affected, and it is also possible to prevent the occurrence of squealing noise when the impeller 2 rotates due to an excessively large F value, and it is understood that the actual distance of F may be reasonably considered based on the overall size of the cross-flow duct assembly.
Based on the warm air blower provided by any embodiment, the invention further provides the warm air blower which comprises the heating piece 5 and the cross flow air channel assembly, wherein the heating piece 5 is installed on the inner side of the air outlet 131, so that in the working process of the warm air blower, the air to be blown out from the air outlet 131 is preheated, and the temperature of the blown air is relatively high. Further, in order to prevent the interference between the hot gas and the cold gas from adversely affecting the normal operation of the impeller 2 after the heat generating member 5 heats the gas, it is preferable that the minimum distance between the impeller 2 and the heat generating member 5 is greater than 30mm, in which case the adverse effect of the heat generating member 5 heating the gas to promote the backflow of the gas can be reduced as small as possible.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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 should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A cross-flow duct assembly, comprising:
the air conditioner comprises a shell (1), wherein the shell (1) is provided with an air inlet (111), an air duct (121) and an air outlet (131), the air inlet (111) and the air outlet (131) are respectively arranged on two opposite sides of the air duct (121) and are communicated with the air duct (121), and the axis of the air inlet (111) is parallel to the axis of the air outlet (131);
the impeller (2) is positioned in the air duct (121) of the shell (1), and the impeller (2) is rotatably connected with the shell (1);
the air guide vortex tongue (3) extends from the air outlet (131) to the direction close to the impeller (2);
the air guide volute (4) extends from the air outlet (131) to a direction close to the impeller (2), the air guide volute (4) and the air guide volute tongue (3) are respectively arranged on two opposite sides of the air outlet (131), and a set distance is reserved between the air guide volute tongue (3) and the impeller (2) and between the air guide volute (4) and the impeller (2);
the diameter of the impeller (2) is D, the minimum distance between the air guide volute tongue (3) and the impeller (2) is A, D/25 is not less than A and not more than D/14, the minimum distance between the air guide volute (4) and the impeller (2) is B, D/25 is not less than B and not more than D/20, the air guide volute tongue (3) comprises an anti-backflow part (32) and a main body part (31), the anti-backflow part (32) is connected to one side, close to the impeller (2), of the main body part (31), the anti-backflow part (32) is located at one end, far away from the air outlet (131), of the main body part (31), the anti-backflow part (32) is arranged in a protruding mode relative to the main body part (31), the distance between the anti-backflow part (32) and the impeller (2) is A, and the main body part (31) comprises a volute tongue (311), a windward section (312) and a blocking section (313), the backflow preventing part (32) is connected to the volute tongue (311), the volute tongue (311) and the windward section (312) are both of arc structures, the volute tongue (311) protrudes in a direction far away from the impeller (2), the windward section (312) protrudes in a direction far away from the air guide volute (4), the volute tongue (311) is connected with the blocking section (313) through the windward section (312), the blocking section (313) is of a flat structure, the air guide volute (4) comprises a volute (41), an air guide section (42) and an air outlet section (43), the volute (41) and the air guide section (42) are both of arc structures, the volute (41) protrudes in a direction far away from the impeller (2), the air guide section (42) protrudes in a direction close to the impeller (2), and the air guide section (42) is connected with the air outlet section (43) through the air guide section (42) towards the volute (41), the air outlet section (43) is of a flat plate structure, and the curvature of the windward section (312) is greater than that of the air guide section (42).
2. The cross-flow duct assembly of claim 1, wherein the backflow prevention portion (32) is of a streamlined structure.
3. The cross-flow duct assembly according to claim 1, characterized in that the vortex tongue (311) and the windward section (312) are connected through a transition section (314), the transition section (314) is of an arc-shaped structure, and the transition section (314) protrudes in a direction close to the impeller (2).
4. The cross-flow duct assembly according to claim 1, wherein the minimum distance between the volute (41) and the impeller (2) is gradually increased in a direction approaching the air guide section (42).
5. The cross-flow duct assembly according to claim 1, wherein the casing (1) comprises a front casing (11), a middle casing (12) and a rear casing (13), the front casing (11) is connected with the rear casing (13) through the middle casing (12), the front casing (11) has the air inlet (111), the rear casing (13) has the air outlet (131), gaps between the air guide volute (4) and the air guide volute tongue (3) and the casing (1) are respectively an air inlet side and an air outlet side, the impeller (2) is closer to the air inlet side than the air outlet side, and a distance between a shaft center of the impeller (2) and a shaft center line of the front casing (11) and the rear casing (13) is F, 0 < F ≦ D/7.
6. A fan heater, characterized in that it comprises a heat generating member (5) and a cross-flow duct assembly according to any one of claims 1-5, said heat generating member (5) being mounted inside said air outlet (131).
7. The fan heater according to claim 6, characterized in that the minimum spacing between the impeller (2) and the heat generating member (5) is greater than or equal to 30 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910647540.1A CN110553399B (en) | 2019-07-17 | 2019-07-17 | Cross flow air duct assembly and fan heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910647540.1A CN110553399B (en) | 2019-07-17 | 2019-07-17 | Cross flow air duct assembly and fan heater |
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| Publication Number | Publication Date |
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| CN110553399A CN110553399A (en) | 2019-12-10 |
| CN110553399B true CN110553399B (en) | 2021-07-20 |
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| CN201910647540.1A Active CN110553399B (en) | 2019-07-17 | 2019-07-17 | Cross flow air duct assembly and fan heater |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110553399A (en) | 2019-12-10 |
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