CN219713456U - Heating equipment - Google Patents

Abstract

The utility model provides heating equipment. The heating equipment provided by the utility model comprises a box body and a mixed flow fan; the box body comprises an air inlet cavity and an air channel, the air inlet cavity is positioned at the end part of the air channel, and the air channel is communicated with the air inlet cavity; the mixed flow fan is arranged in the air inlet cavity and blows air flow into the air channel, the air inlet cavity is provided with an air inlet, the air inlet is positioned on one side of the air inlet cavity, deviating from the air channel, and the air inlet direction of the air inlet is the same as the air outlet direction of the mixed flow fan, so that the impact force generated when the air flow enters the box body is reduced, the wind noise of the air flow is reduced, and the user experience is improved.

Description

Heating equipment

Technical Field

The utility model relates to the technical field of electrical equipment, in particular to heating equipment.

Background

With the development of technology and the improvement of living standard, living conditions are continuously improved, people have higher requirements on living environment quality, and electric equipment such as air conditioners, ventilating fans, fan heaters and the like are becoming more popular, and functions are becoming more and more.

In the related art, an indoor fan heater is generally installed on a ceiling, and blows hot air into a space below the ceiling to adjust indoor temperature, the fan heater generally comprises a shell and a fan arranged in the shell, the fan blows air to an air channel of the shell, an air inlet and an air outlet of the air channel are relatively independent, and the air inlet and the air outlet of the air channel face to the lower side of the ceiling.

However, current fan heaters have a relatively large wind noise when entering.

Disclosure of Invention

The embodiment of the utility model provides heating equipment, which aims to solve the technical problem of large wind noise during the air inlet of a fan heater in the related art.

The utility model provides heating equipment, which comprises a box body and a mixed flow fan; the box body comprises an air inlet cavity and an air channel, the air inlet cavity is positioned at the end part of the air channel, and the air channel is communicated with the air inlet cavity; the mixed flow fan is arranged in the air inlet cavity and blows air flow into the air channel.

The air inlet cavity is provided with an air inlet, the air inlet is positioned on one side of the air inlet cavity, which is away from the air channel, and the air inlet direction of the air inlet is the same as the air outlet direction of the mixed flow fan.

According to the heating equipment provided by the utility model, the mixed flow fan is used, and the air inlet is arranged at the air inlet end of the mixed flow fan, so that the air flow direction can be kept consistent when the air flows into the air channel from the air inlet, the impact force generated when the air flows into the box body is reduced, the wind noise of the air flow is reduced, and the user experience is improved.

As an alternative embodiment, the ventilation cross-sectional dimension of the air inlet cavity is matched with the cross-sectional dimension of the air duct; the width of the mixed flow fan is matched with that of the air inlet cavity.

So set up, the spatial structure of make full use of box for the box is whole rectangular shape, when guaranteeing air inlet efficiency, has reduced the space and has taken up.

As an alternative embodiment, the air outlet direction of the mixed flow fan may be consistent with the extending direction of the air duct.

By the arrangement, the smoothness of the air outlet of the mixed flow fan can be guaranteed, and the air noise of the mixed flow fan during air outlet is reduced.

As an alternative embodiment, the air duct may include a first air duct having a first air outlet and a second air duct having a second air outlet; the first air outlet can be located the side of box, and the second air outlet can be located the one end that the box deviates from the air intake.

So set up, can separate the wind channel into two regions of mutual independence, both can realize indoor warm braw function, can realize new trend function again, improve user experience.

As an alternative embodiment, a partition plate and a reversing plate can be arranged in the air duct; the partition plate extends along the length direction of the box body so as to divide the air duct into a first air duct and a second air duct; the reversing plate may be disposed between the first air duct and the second air duct, the reversing plate being configured to be rotatable relative to the partition to allow air flow into either the first air duct or the second air duct.

By the arrangement, free conversion of heating equipment between warm air and fresh air functions can be realized, and air flow crosstalk between the first air duct and the second air duct is avoided.

As an alternative embodiment, the reversing plate may be provided with ventilation holes, which communicate with opposite sides of the reversing plate.

So set up, when the heating installation is carrying out indoor warm braw, can also carry out low flow's new trend through the ventilation hole to guarantee the fresh of indoor air.

As an alternative embodiment, the air inlet directions of the first air duct and the second air duct may be identical to the air inlet direction of the air inlet.

By the arrangement, the airflow enters from the air inlet to the air inlet channel, and the flow direction can be kept unchanged basically, so that the flow speed of the airflow is improved, and the wind noise is further reduced.

As an alternative embodiment, the box body may include a casing and a cover plate, where the casing and the cover plate enclose an air duct and an air inlet cavity, and the first air outlet may be disposed on the cover plate; the air inlet and the second air outlet are respectively positioned at two ends of the shell.

So set up, improve the dismouting convenience of box, the box machine-shaping of being convenient for simultaneously to and the inside part assembly of box of being convenient for reduces manufacturing cost.

As an alternative embodiment, the heating apparatus may further include a panel having a vent that may extend along a length direction of the case and form a plurality of vent areas, and the air inlet and the first air outlet may be respectively communicated with the different vent areas.

So set up, can utilize the rectangular structure of box, utilize the ventilation hole both can realize the air inlet and can realize warm braw air-out again, reduce the occupation of assembly space.

As an alternative embodiment, the panel may be provided with a movable portion, which may be located at a side of the vent, and the movable portion is opposite to the air inlet cavity; the movable part can be opened and closed relative to the panel.

By the arrangement, the air inlet area can be increased during air inlet, and the air inlet quantity is improved.

The utility model provides heating equipment, which comprises a box body and a mixed flow fan; the box body comprises an air inlet cavity and an air channel, the air inlet cavity is positioned at the end part of the air channel, and the air channel is communicated with the air inlet cavity; the mixed flow fan is arranged in the air inlet cavity and blows air flow into the air channel, the air inlet cavity is provided with an air inlet, the air inlet is positioned on one side of the air inlet cavity, deviating from the air channel, and the air inlet direction of the air inlet is the same as the air outlet direction of the mixed flow fan, so that the impact force generated when the air flow enters the box body is reduced, the wind noise of the air flow is reduced, and the user experience is improved.

In addition to the technical problems, the technical features constituting the technical solutions and the beneficial effects caused by the technical features of the embodiments of the present utility model described above, other technical problems that the heating apparatus provided by the present utility model can solve, other technical features included in the technical solutions and beneficial effects caused by the technical features will be described in further detail in the detailed description of the present utility model.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a heating apparatus according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a heating device according to an embodiment of the present utility model;

FIG. 3 is an end schematic view of a heating appliance provided by an embodiment of the present utility model;

FIG. 4 is a side view of a heating appliance according to an embodiment of the present utility model;

FIG. 5 is an exploded view of a heating appliance provided by an embodiment of the present utility model;

fig. 6 is a schematic diagram of an internal structure of a heating apparatus according to an embodiment of the present utility model;

FIG. 7 is a top view of the internal structure of a heating appliance according to an embodiment of the present utility model;

fig. 8 is a second side view of a heating apparatus according to an embodiment of the present utility model.

Reference numerals illustrate:

100-box body; 101-a housing; 102-cover plate; 110-air duct; 110 a-a first air duct; 110 b-a second air duct; 111-an air inlet; 112-a first air outlet; 113-a second air outlet; 114-a separator; 115-reversing plate; 1151-vent holes; 120-an air inlet cavity;

200-mixed flow fans;

300-a heating unit;

400-panel; 410-vents; 411-ventilation zone; 420-active part.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model.

First, it should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model. Those skilled in the art can adapt it as desired to suit a particular application.

Further, it should be noted that, in the description of the present utility model, terms such as "upper", "lower", "left", "right", "front", "rear", "inner", "outer", and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or components must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; there may be communication between the interiors of the two members. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Electrical devices such as air conditioners, ventilation fans, warm air blowers and the like are becoming more popular, and functions are becoming more and more popular. Taking the fan heater as an example, the indoor fan heater is generally installed on the suspended ceiling, and blows hot air into the space below the suspended ceiling to adjust the indoor temperature, the fan heater generally comprises a shell and a fan arranged in the shell, the fan blows air to an air channel of the shell, and an air inlet and an air outlet of the air channel are relatively independent and face to the lower side of the suspended ceiling. However, the wind noise is large when the fan heater is used for air intake.

In view of the above problems, the utility model provides a cleaning device, which is characterized in that an air inlet of a box body is arranged at an air inlet end of a mixed flow fan, and axial air inlet is realized by the mixed flow fan, so that the air inlet direction of the box body and the air inlet direction of an air duct are kept similar, the impact of air flow is reduced, and the wind noise is reduced.

In order to facilitate understanding, an application scenario of the fan heater provided by the embodiment of the present utility model is first illustrated.

The heating device provided by the embodiment of the utility model can be applied to rooms such as a bathroom, a living room and a kitchen of a family, and can also be applied to other indoor spaces such as classrooms, office places and shops, in addition, the heating device in the embodiment of the utility model can be installed on an indoor suspended ceiling and is matched with a hanging plate in a hanging manner, and the heating device has functions such as but not limited to warm air, fresh air or warm air, fresh air and the like at the same time.

Fig. 1 is a schematic structural view of a heating apparatus according to an embodiment of the present utility model, fig. 2 is a schematic structural view of a heating apparatus according to an embodiment of the present utility model, fig. 3 is an end schematic view of a heating apparatus according to an embodiment of the present utility model, fig. 4 is a side view of a heating apparatus according to an embodiment of the present utility model, fig. 5 is an exploded view of a heating apparatus according to an embodiment of the present utility model, fig. 6 is an internal schematic structural view of a heating apparatus according to an embodiment of the present utility model, and fig. 7 is an internal structural top view of a heating apparatus according to an embodiment of the present utility model.

As shown in fig. 1 to 7, an embodiment of the present utility model provides a heating apparatus, which includes a box 100 and a mixed flow fan 200, wherein the box 100 includes an air inlet cavity 120 and an air duct 110, the air inlet cavity 120 is located at an end of the air duct 110, the air duct 110 is communicated with the air inlet cavity 120, and the mixed flow fan 200 is disposed in the air inlet cavity 120 and blows air into the air duct 110.

It will be appreciated that the air flow generated by the mixed flow fan 200 may enter the air duct 110 from the air inlet cavity 120, and the air flow may flow along the air duct 110 and be blown out from the first air outlet 112. The first air outlet 112 may be provided with a heating unit 300, and when the air flows out of the first air outlet 112, the air flow may flow through the heating unit 300, and the heating unit 300 may heat the air flow, so that the first air outlet 112 may blow out hot air.

For example, when the heating device is installed on the indoor ceiling, indoor air can enter the air duct 110 from the air inlet cavity 120 under the driving of the mixed flow fan 200, and heated air enters and exits from the first air outlet 112 to the space below the ceiling, so as to realize the function of warm air.

In some embodiments, the air inlet cavity 120 has an air inlet 111, the air inlet 111 is located at a side of the air inlet cavity 120 facing away from the air duct 110, and an air inlet direction of the air inlet 111 is the same as an air outlet direction of the mixed flow fan 200.

It can be understood that the power unit forming the air flow in the heating device is the mixed flow fan 200, and the mixed flow fan 200 can realize axial air inlet and outlet and can improve the air pressure of the air inlet and outlet, so that the space occupation in the box body 100 can be reduced by arranging the mixed flow fan 200 at the end part of the box body 100, the volume of the box body 100 is reduced, the convenience of the heating device in suspended ceiling installation is improved, and meanwhile, higher air inlet efficiency can be ensured. The specific structure of the mixed flow fan 200 is not described in detail in the embodiment of the present utility model.

It should be noted that, by using the mixed flow fan 200 and arranging the air inlet 111 at the air inlet end of the mixed flow fan 200, the heating device provided by the utility model can keep the air flow direction consistent when the air enters the air duct 110 from the air inlet 111, reduce the impact force generated when the air enters the box 100, further reduce the wind noise of the air flow, and improve the user experience.

The air intake structure of the cabinet 100 will be described in detail first.

With continued reference to fig. 1 to 7, in one possible implementation, the ventilation cross-sectional dimension of the air inlet cavity 120 is matched with the cross-sectional dimension of the air duct 110, and the width dimension of the mixed flow fan 200 is matched with the width dimension of the air inlet cavity 120, so that the space structure of the box 100 can be fully utilized, the volume of the box 100 is reduced, and the space occupation is reduced while the air inlet efficiency is ensured.

It is understood that the case 100 may have a long strip structure, and the air duct 110 may extend along a length direction of the case 100, and the length of the case 100 is greater than a width of the case 100, so that the air duct 110 is formed as the long strip air duct 110. The mixed flow fan 200 can be arranged at the end part of the box body 100, so that the mixed flow fan 200 can blow air flow into the air duct 110 at one end of the air duct 110, air inlet can be realized at the end part of the air duct 110, hot air can be blown out at the side of the box body 100, the structure of the strip-shaped box body 100 is realized, space occupation is reduced, and space utilization rate of heating equipment during installation is improved.

It should be noted that, the air inlet side and the air outlet side of the mixed flow fan 200 are located at two ends of the mixed flow fan 200, and the air inlet 111 of the box 100 and the port of the air duct 110 may be located at two ends of the mixed flow fan 200, so that the air flow enters the air duct 110 from the air inlet cavity 120 to the air flow, which can ensure the smoothness of the air flow circulation, reduce the wind noise, and improve the air inlet efficiency.

In some embodiments, the air outlet direction of the mixed flow fan 200 may be consistent with the extending direction of the air duct 110, so that the smoothness of the air outlet of the mixed flow fan 200 may be ensured, and the wind noise of the mixed flow fan 200 during air outlet may be reduced.

It can be appreciated that the air outlet side of the mixed flow fan 200 may face the end of the air duct 110, the mixed flow fan 200 outputs air along the length direction of the box 100, and the air flow blown by the mixed flow fan 200 may smoothly flow into the air duct 110, so that the direction of the air flow can be reduced in the process from the air flow entering the air duct 110 to the air flow exiting the air duct 110, the air volume loss is avoided, and the air blowing efficiency is further improved.

It should be noted that, the heating device provided in the embodiment of the present utility model may implement a warm air function and a fresh air function, and different functions may be implemented by different portions of the air duct 110, where the foregoing air exhausting manner from the first air outlet 112 may be the warm air function of the heating device, and detailed descriptions will be given below on implementation and switching manners of different functions of the heating device.

With continued reference to fig. 1 to 7, in one possible implementation, the air duct 110 may include a first air duct 110a and a second air duct 110b, where the first air duct 110a has a first air outlet 112, the second air duct 110b has a second air outlet 113, the first air outlet 112 may be located at a side of the box 100, and the second air outlet 113 may be located at an end of the box 100 facing away from the air inlet 111.

It can be appreciated that the air duct 110 can be divided into two mutually independent areas, the first air duct 110a is used for being communicated with the indoor space below the suspended ceiling, and the second air duct 110b can be communicated with the outdoor space, so that the indoor warm air function can be realized, the fresh air function can be realized, and the user experience is improved. It should be noted that, the first air duct 110a and the second air duct 110b may be selectively turned on, or may be turned on simultaneously, so as to perform warm air or fresh air separately, or perform warm air and fresh air simultaneously.

In some embodiments, a partition 114 and a reversing plate 115 may be disposed in the air duct 110, the partition 114 may extend along the length direction of the box 100 to partition the air duct 110 into a first air duct 110a and a second air duct 110b, the reversing plate 115 may be disposed between the first air duct 110a and the second air duct 110b, and the reversing plate 115 may be configured to rotate relative to the partition 114 to allow air flow into the first air duct 110a or the second air duct 110b, so that free conversion of heating equipment between warm air and fresh air functions may be achieved, and air flow crosstalk between the first air duct 110a and the second air duct 110b may be avoided.

It can be understood that the first air duct 110a and the second air duct 110b may be arranged side by side in the width direction of the box 100, and the first air duct 110a and the second air duct 110b may be arranged in parallel, the reversing plate 115 may be driven by a motor, when the reversing plate 115 turns to the inlet of the first air duct 110a, the first air duct 110a is closed, and the corresponding second air duct 110b is opened, at this time, the air flow generated by the mixed flow fan 200 may flow from the second air outlet 113 to the outdoor space through the second air duct 110b, so as to realize the fresh air function; when the reversing plate 115 is turned to the inlet of the second air duct 110b, the second air duct 110b is closed, and the corresponding first air duct 110a is opened, at this time, the air flow generated by the mixed flow fan 200 can be blown from the first air outlet 112 to the indoor space through the first air duct 110a, so as to realize the warm air function.

It should be noted that, when the heating apparatus provided in the embodiment of the present utility model is disposed above the ceiling, the second air outlet 113 may be communicated with the external space through a pipe, and a specific pipe disposition manner may be determined according to a specific space size and layout of the indoor space, which is not specifically limited in the present utility model.

In some embodiments, the reversing plate 115 may be provided with a vent 1151, where the vent 1151 communicates with two opposite sides of the reversing plate 115, and when the heating device is performing indoor warm air, low-flow fresh air can be performed through the vent 1151 to ensure freshness of indoor air.

It is understood that when the reversing plate 115 closes the second air duct 110b, the flow rate of the ventilation hole 1151 may be smaller than that of the first air duct 110a, that is, most of the air flow blown out from the mixed flow fan 200 flows to the first air duct 110a for warm air, and a small amount of air flow flows to the ventilation hole 1151 for fresh air, so that the warm air has higher efficiency.

For example, the plurality of ventilation holes 1151 may be multiple, and the plurality of ventilation holes 1151 may be distributed in an array on the reversing plate 115, for example, the plurality of ventilation holes 1151 may be distributed in a circumferential array, or may be distributed in a square array, which is not limited by the specific number and arrangement of the ventilation holes 1151 in the embodiment of the present utility model. In addition, the shape of the vent 1151 may be a round hole, an elliptical hole, a square hole, or other shaped holes, and the specific shape and size of the vent 1151 are not specifically limited in the embodiment of the present utility model.

It should be noted that, the air inlet directions of the first air duct 110a and the second air duct 110b may be the same as the air inlet direction of the air inlet 111, and the airflow may enter from the air inlet 111 to the air inlet 110, so that the flow direction may be kept substantially unchanged, thereby improving the flow velocity of the airflow and further reducing the wind noise.

In some embodiments, the air inlet 111 may be provided with a grille, and the grille may be provided with a filter to filter air entering the air inlet cavity 120, and the size of the air inlet 111 may be approximately or equal to the inner cross-sectional size of the ventilation cavity, so as to ensure that the ventilation cavity has a larger running area, and improve air inlet efficiency.

It will be appreciated that the air inlet cavity 120 is communicated with the external space of the box 100 through the air inlet 111, and when the box 100 is installed in the space above the indoor suspended ceiling, the air inlet cavity 120 is communicated with the space above the suspended ceiling through the air inlet 111, and the space above the suspended ceiling can be communicated with the space below the suspended ceiling, so that when the mixed flow fan 200 works, air in the indoor space enters the space above the suspended ceiling from the space below the suspended ceiling first, and then enters the air inlet cavity 120 from the space above the suspended ceiling through the air inlet 111.

The structure of the case 100 will be described below.

With continued reference to fig. 1 to 7, in one possible implementation manner, the box 100 may include a housing 101 and a cover plate 102, where the housing 101 and the cover plate 102 enclose an air duct 110 and an air inlet cavity 120, a first air outlet 112 may be disposed on the cover plate 102, and an air inlet 111 and a second air outlet 113 are respectively disposed at two ends of the housing 101, so as to improve convenience in assembling and disassembling the box 100, and facilitate processing and molding of the box 100, and assembly of components inside the box 100, and reduce production cost.

It will be appreciated that the housing 101 and the cover 102 may be detachably connected by fasteners to facilitate assembly of the components of the mixed flow fan 200, the reversing plate 115, etc., and the connection manner of the housing 101 and the cover 102 includes, but is not limited to, a snap connection, a screw or bolt connection, etc., which is not particularly limited in this embodiment of the utility model.

Fig. 8 is a second side view of a heating apparatus according to an embodiment of the present utility model.

Referring to fig. 3 to 8, in some embodiments, the heating apparatus may further include a panel 400, where the panel 400 has a ventilation opening 410, the ventilation opening 410 may extend along a length direction of the box 100 and form a plurality of ventilation areas 411, and the air inlet 111 and the first air outlet 112 are respectively communicated with the different ventilation areas 411.

It can be appreciated that the size and shape of the panel 400 can be matched with the profile of the side surface of the box 100, the air vent 410 can be divided into two parts by using the strip-shaped structure of the box 100, and the two air vent areas 411 of the two air vents 410 can respectively realize the functions of warm air outlet and indoor air upward inlet, namely, the air inlet and warm air outlet can be realized by using the air vent 410, so that the occupation of the assembly space is reduced.

It should be noted that, since the ventilation openings 410 may be elongated, and accordingly, each ventilation area 411 may also be elongated, and adjacent ventilation areas 411 are connected along a straight line direction, mutual interference of air flows entering and exiting between adjacent ventilation areas 411 is small, which is beneficial to improving circulation efficiency of air flows.

In some embodiments, the panel 400 may be provided with a movable portion 420, where the movable portion 420 may be located at a side of the ventilation opening 410, and the movable portion 420 is opposite to the air inlet cavity 120, and the movable portion 420 may be opened and closed relative to the panel 400, so that the air inlet area may be increased and the air inlet amount may be increased when the air is inlet.

It can be appreciated that the movable portion 420 may be connected to the panel 400 by sliding or turning, and the like, and specifically may be mounted on the panel 400 by a sliding rail, a rotating shaft, or the like, and driven by a motor, and the embodiment of the present utility model does not limit the specific opening and closing manner of the movable portion 420.

The embodiment of the utility model provides heating equipment, which comprises a box body and a mixed flow fan; the box body comprises an air inlet cavity and an air channel, the air inlet cavity is positioned at the end part of the air channel, and the air channel is communicated with the air inlet cavity; the mixed flow fan is arranged in the air inlet cavity and blows air flow into the air channel, the air inlet cavity is provided with an air inlet, the air inlet is positioned on one side of the air inlet cavity, deviating from the air channel, and the air inlet direction of the air inlet is the same as the air outlet direction of the mixed flow fan, so that the impact force generated when the air flow enters the box body is reduced, the wind noise of the air flow is reduced, and the user experience is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. The heating equipment is characterized by comprising a box body and a mixed flow fan; the box body comprises an air inlet cavity and an air channel, the air inlet cavity is positioned at the end part of the air channel, and the air channel is communicated with the air inlet cavity; the mixed flow fan is arranged in the air inlet cavity and blows air flow into the air duct;

the air inlet cavity is provided with an air inlet, the air inlet is positioned at one side of the air inlet cavity, which is away from the air duct, and the air inlet direction of the air inlet is the same as the air outlet direction of the mixed flow fan.

2. The heating appliance of claim 1, wherein a ventilation cross-sectional dimension of the air intake chamber matches a cross-sectional dimension of the air duct; the width of the mixed flow fan is matched with that of the air inlet cavity.

3. The heating apparatus according to claim 2, wherein the air outlet direction of the mixed flow fan is identical to the extending direction of the air duct.

4. A heating apparatus according to any one of claims 1 to 3, wherein the air duct comprises a first air duct having a first air outlet and a second air duct having a second air outlet; the first air outlet is positioned at the side of the box body, and the second air outlet is positioned at one end of the box body, which is away from the air inlet.

5. The heating apparatus of claim 4, wherein a baffle and a reversing plate are disposed in the air duct; the partition plate extends along the length direction of the box body so as to divide the air duct into the first air duct and the second air duct; the reversing plate is disposed between the first air channel and the second air channel, and the reversing plate is configured to be rotatable relative to the partition plate to enable the air flow to enter the first air channel or the second air channel.

6. The heating appliance of claim 5, wherein said reversing plate is provided with vent holes communicating with opposite sides of said reversing plate.

7. The heating apparatus of claim 5, wherein the air inlet direction of the first air duct and the second air duct are both identical to the air inlet direction of the air inlet.

8. The heating apparatus of claim 4, wherein the housing comprises a housing and a cover plate, the housing and the cover plate enclosing to form the air duct and the air intake chamber, the first air outlet being disposed in the cover plate; the air inlet and the second air outlet are respectively positioned at two ends of the shell.

9. The heating appliance of claim 4, further comprising a panel having a vent extending along a length of said housing and defining a plurality of vent areas, said air inlet and said first air outlet each communicating with a different one of said vent areas.

10. The heating appliance of claim 9, wherein the panel is provided with a movable portion, the movable portion being located laterally of the vent and opposite the air intake chamber; the movable part can be opened and closed relative to the panel.