CN216591900U

CN216591900U - Air duct switching assembly and fan heater

Info

Publication number: CN216591900U
Application number: CN202123283168.2U
Authority: CN
Inventors: 张驰; 李曙光; 柳洲; 梁浩; 饶长健; 田伶
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-05-24
Anticipated expiration: 2031-12-24

Abstract

The utility model discloses an air duct switching component and a fan heater, wherein the air duct switching component comprises an air duct, the air duct is provided with an air inlet, a first air outlet channel and a second air outlet which are relatively independent; the air duct is provided with a humidifying component, a heating body is arranged in the first air outlet channel, and a valve plate is arranged in the air duct; the valve plate opens the first air outlet channel and closes the second air outlet, so that the first air outlet channel discharges the humidified and heated air; the valve plate closes the first air outlet channel and opens the second air outlet, so that the second air outlet discharges the humidified air. Wind channel switching subassembly, place the heat-generating body in independent first air-out passageway, in first air-out passageway, the heat-generating body can not flowed through to high humid air, prevents that the heat-generating body from rustting.

Description

Air duct switching assembly and fan heater

Technical Field

The utility model belongs to the heating field especially relates to a wind channel switching module and electric fan heater.

Background

The fan heater is used as a heating device, the heating device arranged in the shell is electrified to heat, and the power device drives the fan blades to blow out heat generated by the heating device, so that the room temperature is heated, the heating purpose is achieved, and the fan heater is widely applied in autumn and winter in China.

The air humidity is relatively low in winter, and the heating effect of the fan heater enables the air to be drier, so that the user experience is influenced, and even the health of the user is harmed, and therefore, the humidification function is very necessary to be added on the basis of the fan heater.

But at present on the market humidification electric fan heater mostly is single wind channel, need not basically go up heating function in spring and summer two seasons that air temperature is higher relatively, if close heating device and only keep its humidification function, can make steam stop on the heating element surface inevitably, receive long-term oxidation and can make materials such as its heater rust, reduce product life, the heating still can produce harmful gas and bring the hidden danger for user's health.

SUMMERY OF THE UTILITY MODEL

The utility model provides an air duct switching assembly and electric fan heater to solve the heating device who mentions among the background art and because of the rusty technical problem of steam.

In order to achieve the above object, the utility model discloses a concrete technical scheme of wind channel switching module and electric fan heater as follows:

an air duct switching assembly comprises an air duct, wherein the air duct is provided with an air inlet, a first air outlet channel and a second air outlet which are relatively independent; the air duct is provided with a humidifying component, a heating body is arranged in the first air outlet channel, and a valve plate is arranged in the air duct; the valve plate opens the first air outlet channel and closes the second air outlet, so that the first air outlet channel discharges the humidified and heated air; the valve plate closes the first air outlet channel and opens the second air outlet, so that the second air outlet discharges the humidified air.

Furthermore, the valve plate comprises a rotatable air deflector, one end of the air deflector is rotatably connected with the side wall of the air duct, and the other end of the air deflector can rotate to the side wall of the second air outlet, so that air is discharged from the second air outlet along the air deflector.

Further, the valve plate includes the baffle that can slide, and the baffle slides in order to open and close the second air outlet.

Further, the air duct comprises a power cavity, and a rotatable impeller is arranged in the power cavity; the upstream of the power cavity is connected with the air inlet, and the downstream of the power cavity is connected with the first air outlet channel and the second air outlet.

Further, the humidification subassembly includes wet curtain, and wet curtain covers the air intake.

Further, the minimum distance between the wet curtain and the impeller is 1/12 to 1/3 of the diameter of the impeller.

Furthermore, the upper end of the wet curtain is positioned at the inlet of the power cavity, and the length of the air inlet is 5/6-5/3 of the diameter of the impeller.

Furthermore, two sides of the impeller are provided with a volute and a volute tongue which are opposite, the volute tongue is positioned on one side, close to the air inlet, of the impeller, and the volute is positioned on one side, far away from the air inlet, of the impeller.

Furthermore, the volute tongue is provided with a windward side which is concentric with the outer circle of the impeller, and the distance between the windward side and the impeller is 1/28-1/10 of the diameter of the impeller.

Furthermore, a second air guide surface is formed on the volute, and the second air guide surface gradually gets away from the impeller along with the distance from the air inlet; the minimum distance between the second air guide surface and the impeller is 1/22-1/11 of the diameter of the impeller.

Furthermore, an outlet of the power cavity is formed between the volute casing and the volute tongue, an air guide grid is arranged at the outlet, and the air guide grid-shaped line is arranged in parallel to the air duct.

Further, the outlet width is 1/2 to 1 of the impeller diameter.

Further, the distance between the heating body and the outlet is 1 to 5 times of the diameter of the impeller.

A fan heater comprises the air channel switching assembly.

The utility model discloses a wind channel switching module and electric fan heater have following advantage:

1. the heating body is placed in the independent first air outlet channel, and when the first air outlet channel is used, high-humidity air cannot flow through the heating body, so that the heating body is prevented from rusting.

2. The through-flow air duct with even air cutting and good air supply continuity is used as a support, the air duct system which is used for the humidification electric heater and has switchable heating and humidification modes is provided, the problems that a single air heater in the market is dry in air supply and the existing humidification electric heater is single in air duct and limited in use season can be effectively solved, and therefore the functionality and the applicability of humidification electric heater products are improved, and the comfort experience of users is improved.

Drawings

Fig. 1 is a schematic structural view of an air duct switching assembly of the present invention;

fig. 2 is a schematic view of the internal structure of the air duct switching assembly of the present invention;

fig. 3 is a sectional view of the air duct switching assembly of the present invention 1;

fig. 4 is a sectional view 2 of the air duct switching assembly of the present invention;

fig. 5 is a cross-sectional view of the lower end of the air duct switching assembly of the present invention.

The notation in the figure is:

1. a body; 11. an air inlet; 12. a power cavity; 121. an air guide grid; 13. a first air outlet channel; 14. a second air outlet; 2. a cross flow wind wheel; 3. wet curtain; 4. a water storage tank; 5. an air deflector; 6. a baffle plate; 7. a heating element; 8. a volute; 81. a second wind guide surface; 9. a volute tongue; 91. the windward side; 92. a first wind guide surface.

Detailed Description

In order to better understand the purpose, structure and function of the present invention, the following description is made in detail with reference to the accompanying drawings.

As shown in fig. 1 to 4, the utility model discloses an air duct switching assembly, including fuselage 1, be formed with the air duct in the fuselage 1, the air duct has a power chamber 12, and air intake 11 is connected on 12 upper reaches in power chamber, and power chamber 12 is connected with two relatively independent first air-out passageways 13 and second air outlet 14 in the low reaches. Wherein the air inlet 11 is located at the side of the lower end of the machine body 1, the first air outlet channel 13 is located at the upper end of the machine body 1, and the second air outlet 14 is located at the side of the upper end of the machine body 1. Air enters the power cavity 12 from the air inlet 11 and is exhausted from the first air outlet channel 13 or the second air outlet 14 through the power cavity 12.

Wherein, the power cavity 12 is internally provided with a pneumatic component, the pneumatic component comprises a rotatable impeller, and the impeller is generally a cross-flow wind wheel 2 formed by a plurality of sections of impellers. The cross flow wind wheel 2 has the characteristics of uniform wind cutting, good air supply continuity and the like, and is suitable for an air duct system with higher requirements on flow field uniformity, such as humidification, heating and the like. The impeller is driven to rotate by the motor, so that negative pressure is generated at the air inlet 11 of the air duct, and external air is sucked into the air inlet 11.

The air inlet 11 is provided with a humidifying component, the humidifying component comprises a wet curtain 3 and a water storage tank 4, and the wet curtain 3 is hung at the air inlet 11 to cover the air inlet 11. The water storage tank 4 is arranged at the bottom of the machine body 1, and the lower end of the wet curtain 3 extends into the water storage tank 4. The water is stored in the water storage tank 4 to wet the wet curtain 3, when air enters from the air inlet 11, the moisture of the wet curtain 3 is in convection exchange with dry air flow, and the air is vaporized into high-humidity air which is continuously conveyed upwards by the pneumatic assembly. In addition, the humidifying components are respectively arranged at the first air outlet channel 13 and the second air outlet 14, but the humidifying components are wasted and are not preferred.

In order to ensure that the wet curtain 3 is soaked, a water pump can be arranged in the water storage tank 4, and water in the water storage tank 4 is sprayed on the wet curtain 3 from top to bottom through a water distribution pipe. Besides the wet curtain 3, the humidifying component can also adopt modes such as an atomizing sheet and the like, and can achieve the humidifying effect.

In order to switch the first air outlet channel 13 and the second air outlet 14, the first air outlet channel 13 and the second air outlet 14 may be separated by a partition wall, and valves may be respectively disposed, so that switching is realized by opening and closing, but space is wasted. And thus the space of the body 1 can be shared. A straight plate is arranged at the tail end of the power cavity 12 to prolong the range of the power cavity 12. The straight plate is provided with an air deflector 5 through a rotating shaft, one end of the air deflector 5 is rotatably connected with the side wall of the air duct, and the other end of the air deflector 5 can rotate to the side wall of one side of the second air outlet 14 so as to close the first air outlet channel 13, otherwise, the tail end of the air deflector 5 is far away from the second air outlet 14, and the first air outlet channel 13 is opened. A sliding baffle 6 is arranged on one side of the second air outlet 14, and the baffle 6 slides to open and close the second air outlet 14.

And the heating body 7 is arranged in the first air outlet channel 13, the heating body 7 heats high-humidity air to generate high-temperature high-humidity air,

in summary, when the air deflector 5 opens the first air outlet channel 13 and the baffle 6 closes the second air outlet 14, the high humidity air discharged from the power cavity 12 is directly discharged from the first air outlet channel 13 along the air duct, and the heating element 7 heats the high humidity air, so that the high temperature and high humidity air is discharged from the first air outlet channel 13 to realize the heating, humidifying and air supplying functions; when the air deflector 5 closes the first air outlet channel 13 and the baffle 6 opens the second air outlet 14, the high-humidity air is discharged from the second air outlet 14 along the air deflector 5, so that the single humidification air supply function is realized.

Further, the damper 6 may be opened or closed by sliding the air guide plate 5 and rotating the damper 6, and the above-described effects can be similarly obtained. Only by arranging the air deflector 5 at the first air outlet channel 13 instead of the air outlet of the first air outlet channel 13, the moisture can not pass through the heating element 7 when the heating element 7 is not used. Meanwhile, the arc-shaped air deflector 5 also has the function of guiding the wind direction, so that the air in the power cavity 12 is guided to the second air outlet 14.

Referring to fig. 5, specifically, two sides of the cross-flow wind wheel 2 are provided with a volute 8 and a volute tongue 9 which are opposite to each other, and the volute tongue 9 is located on one side of the cross-flow wind wheel 2 close to the wet curtain 3 and is located on the upper side of the wet curtain 3; and the volute 8 is positioned on the side of the cross flow wind wheel 2 far away from the wet curtain 3. Because the space of the machine body 1 is limited, the lower side of the volute tongue 9 is connected with the wet curtain 3, so the volute tongue 9 is shorter than the volute casing 8, otherwise, the two volute casings 8 are arranged oppositely.

The volute tongue 9 is provided with a windward side 91 which is concentric with the excircle of the impeller, so that the windward side 91 is an inward concave side. The distance A between the windward side 91 and the impeller and the diameter D of the impeller meet the condition that A is more than or equal to 1D/28 and less than or equal to 1D/10. A first air guiding surface 92 is formed on the windward side 91 close to the air inlet 11, and the first air guiding surface 92 is a plane and horizontally extends from the edge of the windward side 91 to the edge of the air inlet 11. The windward side 91 and the outer circle of the impeller are concentrically arranged, the volute tongue 9 plays a role of a splitter cone, the ratio of the clearance of the volute tongue 9 to the outer diameter of the impeller has obvious influence on flow and efficiency, certain influence is exerted on air duct pressure, when the tongue clearance is larger, the pressure head of the fan is reduced, and the flow is reduced; when the tongue clearance is reduced, the pressure rises, and the flow increases, but noise peak value and tone quality also can worsen, and can cause the influence to aspects such as follow-up wind channel commentaries on classics joining in marriage and impeller ann rule, consequently need manage and control this parameter.

And the volute 8 is provided with a second air guide surface 81, the second air guide surface 81 gradually gets away from the impeller along with getting away from the air inlet 11, a volute is formed on the second air guide surface 81 at the position close to the impeller, and the minimum distance B between the volutes and the diameter D of the impeller satisfy 1D/22-B1D/11. The air quantity is reduced due to the increase of the distance from the cross-flow wind wheel 2 to the volute 8, and the vortex area at the rear end of the volute 8 is gradually increased due to the increase of the distance from the volute 8, so that the turbulence noise is increased; the too small volute gap can increase the non-uniformity of the air speed and pressure of the air flow in the impeller, increase the pulsating force in the area around the volute 8 and increase the rotation noise, so that the parameters need to be limited.

The cross-flow wind wheel 2 enters the volute tongue 9 in the wind channel to rotate in the direction facing the wind surface 91, an outlet is formed between the volute 8 and the volute tongue 9, and an air guide grid 121 is arranged at the outlet. The air guide grid 121 is arranged in parallel with the air duct, and forms a vertical upward air guide trend at the outlet. The width of the outlet is b and the diameter D of the impeller, and b is more than or equal to 1D/2 and less than or equal to D; the width of the air beam at the outlet can be reduced when the size of the outlet is too small, the wind resistance at the position can be increased, the noise in the air duct can be increased, the load of the air duct can be increased, and the cost of the motor can be increased; if the size is too large, the wind speeds on the left side and the right side of the outlet are uneven, and the wind speed at the outlet is reduced, so that the performance of the fan heater is affected.

In addition, due to the influence of the cross-flow air duct and the wind wheel wind cutting direction, the wind beams at the outlet are sent out along the wind wheel wind cutting direction, namely, towards the right side, and finally the wind beams are influenced by the wall attachment jet effect to send air along the right side wall of the fan heater, so that the distribution of an internal wind field is uneven, and the wind guide grille 121 with the upward trend is additionally arranged at the outlet, so that the problem can be effectively solved.

The minimum distance E between the wet curtain 3 and the impeller and the diameter D of the impeller meet the requirement that E is more than or equal to 1D/12 and less than or equal to 1D/3; the technical scheme limits the distance between the cross flow wind wheel 2 and the wet curtain 3, and aims to prevent the influence of the small gap between the cross flow wind wheel and the wet curtain on the stability of a cross flow air duct and the influence of the large gap on the humidifying effect, so that a reasonable gap range is selected.

The upper end of the wet curtain 3 is positioned at an inlet of the power cavity 12, and the length H of the air inlet 11 and the diameter D of the impeller meet the condition that H is more than or equal to 5D/6 and less than or equal to 5D/3; the wet curtain 3 structure made of high hydrophilic materials absorbs water to the position of the inlet of the power cavity 12, and the water is distributed to the inside of the air channel by the negative pressure suction of the inlet of the power cavity 12, so that the humidifying effect is achieved. This technical scheme has made the injecing to wet curtain 3 cover entry height, highly low can lead to through-flow wind channel import windage to increase, influences the wind channel stability, causes the phenomenon of surge and backward flow, still can influence wet curtain 3's utilization efficiency, does not reach best humidification effect. An excessively large height lowers the water absorbing efficiency of the wet curtain 3, and therefore a reasonable height range needs to be established.

The distance h1 between the heating element 7 and the outlet of the power cavity 12 and the diameter D of the impeller satisfy that D is not less than h1 and not more than 5D; this technical scheme has made the injecing to heat-generating body 7 and power chamber 12 altitude interval, if heat-generating body 7 highly crosses lowly apart from power chamber 12, because heat-generating body 7 itself temperature is higher, can lead to power chamber 12 inner structure to receive the high temperature influence and take place to warp, influences its aerodynamic performance, heat-generating body 7 apart from power chamber 12 too far then can make heat-generating body 7 surface receive the wind inequality, influence the heating effect of electric fan heater.

The utility model also discloses a fan heater, including foretell wind channel switching module.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims

1. An air duct switching assembly comprises an air duct and is characterized in that the air duct is provided with an air inlet, a first air outlet channel and a second air outlet which are relatively independent; the air duct is provided with a humidifying component, a heating body is arranged in the first air outlet channel, and a valve plate is arranged in the air duct; the valve plate opens the first air outlet channel and closes the second air outlet, so that the first air outlet channel discharges the humidified and heated air; the valve plate closes the first air outlet channel and opens the second air outlet, so that the second air outlet discharges the humidified air.

2. The duct switching assembly of claim 1, wherein the valve plate comprises a rotatable air deflector having an end and a duct side

The wall is connected in a rotating way, and the other end can rotate to the side wall of the second air outlet, so that air is exhausted from the second air outlet along the air deflector.

3. The air duct switching assembly according to claim 1 or 2, wherein the valve plate comprises a slidable shutter, the shutter sliding to open and close the second air outlet.

4. The air duct switching assembly of claim 1, wherein the air duct includes a power chamber, the power chamber having a rotatable impeller disposed therein; the upstream of the power cavity is connected with the air inlet, and the downstream of the power cavity is connected with the first air outlet channel and the second air outlet.

5. The duct switching assembly of claim 4, wherein the humidifying assembly includes a wet curtain covering the air inlet.

6. The duct switching assembly of claim 5, wherein the minimum distance between the wet curtain and the impeller is 1/12 to 1/3 of the diameter of the impeller.

7. The duct switching assembly of claim 5, wherein the upper end of the wet curtain is located at the inlet of the power chamber, and the length of the air inlet is 5/6 to 5/3 of the diameter of the impeller.

8. The duct switching assembly according to claim 4, wherein the impeller is provided with opposing volute and volute tongue on both sides, the volute tongue is located on a side of the impeller close to the air inlet, and the volute is located on a side of the impeller far from the air inlet.

9. The air duct switching assembly of claim 8, wherein the volute tongue has a windward side disposed concentrically with the outer circumference of the impeller, and the windward side is spaced from the impeller by 1/28 to 1/10 of the diameter of the impeller.

10. The duct switching assembly of claim 8, wherein the volute defines a second wind directing surface that is progressively further from the impeller as the second wind directing surface moves away from the inlet; the minimum distance between the second air guide surface and the impeller is 1/22-1/11 of the diameter of the impeller.

11. The duct switching assembly according to claim 8, wherein an outlet of the power chamber is formed between the volute and the volute tongue, the outlet is provided with an air guide grid, and a grid line of the air guide grid is arranged parallel to the duct.

12. The duct switching assembly of claim 11, wherein the outlet width is 1/2 to 1 of the impeller diameter.

13. The air duct switching assembly according to claim 11, wherein the heat generating body is spaced from the outlet by 1 to 5 times the diameter of the impeller.

14. A fan heater comprising the duct switching assembly according to any one of claims 1-13.