A fresh air and heating device for three zones

Abstract

This invention discloses a three-zone fresh air and heating device. The device comprises a cabinet with shelves. Below the fixed shelves are a fresh air duct assembly and two independent duct assemblies. The fresh air duct assembly is connected to the air inlet. Above the shelves are a louver assembly and a purification device. The shelves have through holes for connecting the duct assembly and the louver assembly. One side of the cabinet has an air inlet, and the other side has three air outlets. Two of the three outlets are used for indoor recirculation, and one is used to connect to the outside for ventilation. In use, since the fresh air duct and the two duct assemblies operate independently, and there are three air outlets, fresh air and warm air can be blown into different areas separately, or two areas can be heated simultaneously, making it suitable for a wide area. Simultaneously, the purification device above the fresh air duct ensures that the fresh air entering the room is filtered and purified before entering, improving the air quality.

Description

Technical Field

[0001] This invention mainly relates to the technical field of bathroom heating equipment, and particularly to a fresh air and heating device for three zones, especially a mechanical structure of a fresh air and heating device that can be used simultaneously in a bathing area, a washing area and a toilet area. Background Technology

[0002] Currently, existing bathroom heaters only provide heating in independent or dual-zone (wet and dry) areas, and do not address the human-centered needs of a third zone (such as the toilet area) for heating, ventilation, and fresh air.

[0003] For example, the prior invention application with application number "201811061906.9" entitled "Warm Air Heater" describes the following technical solution: "The inner side of the back wall of the warm air heater casing is provided with a wall-mounting hole. The warm air heater includes a water-blocking component, a flow-draining component, and a first drain outlet arranged sequentially from the top to the bottom. The first drain outlet is located on the casing. The water-blocking component includes a first water-blocking wall, which is located on the inner side of the back wall directly opposite the wall-mounting hole. The lower end of the first water-blocking wall forms a water-blocking outlet with the back wall. The flow-draining component includes a flow-draining channel located on the inner side of the back wall. The flow-draining channel has a channel inlet and a channel outlet. The channel inlet is connected to the water-blocking outlet, and the channel outlet is connected to the first drain outlet." This type of warm air heater cannot achieve wide-screen airflow, nor can it simultaneously control airflow or heating in two different areas. Its application range is relatively narrow and it is not suitable for the design requirements of modern bathrooms with large areas and separate layouts for the shower and washbasin areas.

[0004] Therefore, there is an urgent need in the market for a device that can blow air and deliver warm air to different areas of a bathroom, either individually or simultaneously. Summary of the Invention

[0005] The purpose of this invention is to provide a fresh air and heating device for three zones, which can achieve multi-zone blowing and heating functions, and can also deliver fresh air to different zones separately.

[0006] To achieve the above objectives, the technical solution of the present invention is: a fresh air and heating device for three zones, comprising a housing, characterized in that the housing is provided with a shelf, a fresh air duct assembly and two independent duct assemblies are provided below the fixed shelf, namely a first duct assembly and a second duct assembly, a flap assembly and a purification device are provided above the shelf, the shelf is provided with a through hole for connecting the duct assembly and the flap, an air inlet is provided on one side of the housing, the fresh air duct assembly is connected to the air inlet, and three air outlets are provided on the other side, two of the three air outlets are used for indoor internal air circulation, and one is used for connecting to the outside for ventilation.

[0007] Preferably, the first air duct assembly includes a first volute and a first motor disposed inside the first volute. A first impeller is connected to the shaft of the first motor. The air duct opening of the first volute is provided with a first heating block assembly and a first guide groove that cooperate with it. A first stepper motor is provided on one side of the first guide groove. A first air guide plate is provided inside the first guide groove. The first air guide plate is connected to a first air outlet for indoor air circulation.

[0008] Furthermore, the second air duct assembly includes a second volute and a second motor disposed inside the second volute. A second impeller is connected to the shaft of the second motor. A second heating block assembly and a second guide groove are provided at the front end of the second volute. A second air guide plate is provided inside the second guide groove. A second stepper motor for opening and closing the second air guide plate is provided on one side of the second guide groove.

[0009] Furthermore, the fresh air duct assembly includes a fresh air duct and a damper located in the middle of the fresh air duct. A third stepper motor for driving the damper is provided on the side of the fresh air duct. A temperature sensor is provided at the front end of the damper. A purification device is provided above the fresh air duct. One end of the fresh air duct is connected to the air inlet.

[0010] Furthermore, the page-swinging assembly includes a page-swinging base and a page-swinging top cover, with a rotatable page-swinging plate between the page-swinging base and the page-swinging top cover, and a fourth stepper motor at the end of the page-swinging plate for driving the page-swinging plate to rotate.

[0011] Compared with the prior art, the technical solution of the present invention not only improves the overall technical solution, but also includes many improvements in details. Specifically, it has the following beneficial effects:

[0012] 1. The improved solution of the present invention is provided with a fresh air duct assembly and two independent air duct assemblies in the box body. A louver assembly and a purification device are provided above the shelf of the box body. The fresh air duct assembly is connected to the air inlet on one side of the box body. Three air outlets are provided on the other side of the box body. Two of the three air outlets are used for indoor internal air circulation, and one is used to connect to the outside for ventilation. Since the fresh air duct and the two air duct assemblies are all independently operated, and there are three air outlets, fresh air and warm air can be blown into different areas separately, or two areas can be blown into the air and heated at the same time. The applicable area is very wide.

[0013] 2. In the technical solution of the present invention, the second vortex shell is provided with two air ducts, which correspond to different air outlets respectively. When the second impeller inside the second vortex shell rotates clockwise or counterclockwise, the air outlet direction of the second vortex shell changes, so that the second vortex shell can blow fresh air in two directions, making the air blowing coverage wider and achieving the function of zoned fresh air supply.

[0014] 3. The fresh air duct of the present invention is equipped with a purification device above it to ensure that the fresh air entering the air inlet is filtered and purified before entering the room, thereby improving the air quality of the fresh air.

[0015] 4. The present invention has a reasonable structural layout, a wide range of applications, and is easy to promote and utilize. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the exploded structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the first air duct assembly structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the second air duct assembly structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the fresh air duct component structure of the present invention.

[0020] Figure 5 This is a schematic diagram of the page-laying component structure of the present invention.

[0021] Figure 6 This is a schematic diagram of the host unit of the present invention.

[0022] Figure 7 for Figure 6 A cross-sectional view (AA) of the first air duct assembly blowing air towards the first air outlet.

[0023] Figure 8 for Figure 6 A BB cross-sectional view of the second air duct assembly blowing air towards the third air outlet.

[0024] Figure 9 for Figure 6 CC cross-sectional view of the second air duct assembly during air exchange.

[0025] Figure 10 This is a reference diagram showing the usage status of the "shower area" blower mode in an embodiment of the present invention.

[0026] Figure 11 This is a reference diagram showing the usage status of the heating mode in the "bathing area" in an embodiment of the present invention.

[0027] Figure 12 This is a reference diagram showing the usage status of the fresh air mode in the "shower area" in an embodiment of the present invention.

[0028] Figure 13 This is a reference diagram showing the usage status of the fresh air mode in the "washroom area" in an embodiment of the present invention.

[0029] Figure 14 This is a reference diagram showing the usage status of the fresh air mode in the "toilet area" in an embodiment of the present invention.

[0030] Figure 15 This is a reference diagram showing the usage status of the combined air blowing and heating mode of the "bathing area" and "washing area" in an embodiment of the present invention.

[0031] Figure 16 This is a reference diagram showing the usage status of the combination of "toilet area" and "washroom area" in the embodiment of the present invention, with blowing, heating or fresh air modes.

[0032] Figure 17 This is a reference diagram showing the usage status of the combination of "toilet area" and "shower area" in the blowing, heating or fresh air mode in an embodiment of the present invention.

[0033] Figure 18 This is a reference diagram showing the usage status of the "bathing area" ventilation, heating and air exchange functions in an embodiment of the present invention.

[0034] Figure 19 This is a reference diagram showing the usage status of the ventilation, heating and air exchange functions of the "toilet area" in an embodiment of the present invention.

[0035] The following labels are marked on the image:

[0036] 1 Purification module, 2 Pre-filter, 3 Layer, 4 Fresh air duct assembly, 5 Air inlet, 6 First air duct assembly, 7 Housing, 8 First air outlet, 9 Second air outlet, 10 Third air outlet;

[0037] 11 Second air duct assembly; 12 Rotating blade assembly;

[0038] 41 Fresh air duct, 42 Temperature sensor, 43 Third stepper motor, 44 Air damper;

[0039] 61 First air guide plate, 62 First air guide channel, 63 First stepper motor, 64 First heating block assembly, 65 First volute, 66 First motor, 67 First impeller;

[0040] 111 Second air guide plate, 112 Second stepper motor, 113 Second air guide groove, 114 Second heating block assembly, 115 Second volute, 116 Second motor, 117 Second impeller;

[0041] 121 Page swing base, 122 Fourth stepper motor, 123 Page swing plate, 124 Page swing top cover. Detailed Implementation

[0042] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand how to practice the present invention. Although the present invention has been described in conjunction with its preferred embodiments, these embodiments are merely illustrative and not intended to limit the scope of the invention.

[0043] like Figure 1As shown, a fresh air and heating device for three zones includes a housing. Its difference from existing technologies lies in the fact that the housing contains shelves. Below the fixed shelves are a fresh air duct assembly and two independent duct assemblies, namely a first duct assembly and a second duct assembly. The fresh air duct assembly is connected to an air inlet. Above the shelves are a flap assembly and a purification device. The shelves contain through holes for connecting the duct assembly and the flaps. One side of the housing has an air inlet, and the other side has three air outlets. Two of the three air outlets are used for indoor recirculation, and one is used to connect to the outside for ventilation.

[0044] Specifically, one side of the enclosure has an outdoor air inlet, and the other side has two indoor air outlets and one outdoor air outlet. Inside the enclosure, there is a fixed shelf, with two independent air duct components and a fresh air duct component fixed under the shelf. The purification device and the louver assembly are fixed on the shelf. The louver assembly is located directly above the two guide slots at the front end of the heating blocks of the two air duct components and is perpendicular to the three air outlets.

[0045] The first air duct assembly consists of a first volute, a first heating block assembly, and a first air guide groove. A first motor that drives the first impeller to rotate clockwise is installed inside the first volute, and a first air outlet is correspondingly provided in the horizontal direction of the first air guide groove. A swivel assembly is located above the first air guide groove, and a first stepper motor fixed to the air guide groove operates the opening or closing of the first air guide plate.

[0046] The second air duct assembly consists of a second volute, a second heating block assembly, and a second air guide groove. The second volute houses a second impeller and a second motor capable of rotating in both directions. A third air outlet is located on the horizontal side of the housing corresponding to the second air guide groove in the clockwise airflow direction. A shared blade assembly is positioned above the second air guide groove. In the counter-clockwise airflow direction, a second air outlet is located at a corresponding position on the housing. A second stepper motor fixed to the second air guide groove operates the second air guide plate to open or close.

[0047] The fresh air duct assembly mainly consists of a fresh air duct, a damper, a temperature sensor, and a third stepper motor. The fresh air duct contains a damper, which is opened or closed by a third stepper motor fixed to the duct via an electronic switch. A temperature sensor is located at the front end of the damper, and an air inlet is located at the corresponding position of the fresh air duct inlet. A pre-filter and purification device are installed above the fresh air duct.

[0048] The purification device can be a high-voltage electronic dust collector, a plasma electronic dust collector, a photocatalytic filter, a HEPA filter, a static dust filter, a cold catalyst filter, or a UV sterilizer. Since these devices are all existing technologies, their specific structures and functional effects will not be described in detail here.

[0049] In use, since the present invention has two independent air duct components, each with a different function corresponds to the air outlet of a different area, by operating the two air duct components, including the clockwise or counterclockwise rotation of the impeller, the functions of blowing air for heating and fresh air in different areas can be realized. At the same time, the fresh air duct component can also be operated separately, so that the incoming fresh air, after being filtered and purified, can be blown out to different air outlets, in order to cooperate with the air duct components to realize the functions of blowing air for heating, ventilation and fresh air treatment in different areas.

[0050] In one embodiment, the first air duct assembly includes a first volute and a first motor disposed inside the first volute. A first impeller is connected to the shaft of the first motor. The air duct opening of the first volute is sequentially provided with a first heating block assembly and a first guide groove that cooperate with it. A first stepper motor is provided on one side of the first guide groove. A first air guide plate is provided inside the first guide groove. The first air guide plate communicates with a first air outlet for indoor air circulation.

[0051] The second air duct assembly includes a second volute and a second motor disposed inside the second volute. A second impeller is connected to the shaft of the second motor. A second heating block assembly and a second guide groove are provided at the front end of the second volute. A second air guide plate is provided inside the second guide groove. A second stepper motor for opening and closing the second air guide plate is provided on one side of the second guide groove.

[0052] The fresh air duct assembly includes a fresh air duct and a damper located in the middle of the fresh air duct. A third stepper motor for driving the damper is located on the side of the fresh air duct. A temperature sensor is located at the front end of the damper. A purification device is located above the fresh air duct. One end of the fresh air duct is connected to the air inlet.

[0053] The damper divides the fresh air duct into two parts: one part is directly connected to the air inlet, and the other part is connected to the purification device through a pre-filter.

[0054] The air blowing area corresponding to this first air duct component is the toilet area. By operating and controlling the first air duct component, the following functional effects can be produced:

[0055] 1. Using a fan or for heating (such as...) Figure 7 (As shown)

[0056] The first step motor 63 is driven by the control switch to open the first air guide plate 61 in the first guide channel 62. At the same time, the first motor 66 in the first volute 65 is operated to drive the rotation of the first impeller 67. After creating negative pressure in the first air duct area, the indoor air is discharged into the room through the first volute 65, the first heating block assembly 64, the first guide channel 62, the first air outlet 8 and the air duct (not shown in the figure) to realize the function of blowing or heating in the indoor toilet area.

[0057] 2. Fresh air (such as) Figure 14(As shown)

[0058] The first stepper motor 63 is driven by a control switch (not shown in the figure) to open the first air guide plate 61 in the first air guide groove 62, and the third stepper motor 43 opens the air damper 44 in the fresh air duct 41. At the same time, the first motor 66 in the first volute 65 drives the first impeller 67 to rotate, so that the air in the first air duct area is negatively pressured. Then, the outdoor air is discharged into the room through the air inlet 5 connected to the air duct (not shown in the figure), the primary filter 2, the purification device 1, the first volute 65, the first heating block assembly 64, the first air guide groove 62, the first air outlet 8 and the air duct (not shown in the figure), so as to introduce fresh outdoor air into the toilet area.

[0059] In this embodiment, the corresponding air-blowing area of ​​the second air duct component is the wash area. By operating the second air duct component, the following functional effects can be achieved in the wash area:

[0060] 1. Using a fan or for heating (such as...) Figure 8 (As shown)

[0061] The second stepper motor 112 is driven by the control switch to open the second air guide plate 111 in the second guide channel 113. At the same time, the second motor 116 in the second volute 115 is operated to drive the second impeller 117 to rotate clockwise. After negative pressure is generated in the second air duct area, the indoor air is discharged into the room through the second volute 115, the second heating block assembly 114, the second guide channel 113, the third air outlet 10 and the air duct (not shown in the figure) to realize the function of blowing or heating in the indoor wash area.

[0062] 2. Fresh air (such as) Figure 13 (As shown)

[0063] The second stepper motor 112 is driven by a control switch (not shown in the figure) to open the second air guide plate 111 in the second guide channel 113, and the third stepper motor 43 opens the air damper 44 in the fresh air duct 41. At the same time, the second motor 116 in the second volute 115 is operated to drive the second impeller 117 to rotate clockwise. After creating negative pressure in the second air duct area, outdoor air is introduced into the washing area through the air inlet 5 connected to the air duct (not shown in the figure), the primary filter 2, the purification device 1, the second volute 115, the second heating block assembly 114, the second guide channel 113, the third air outlet 10 and the air duct (not shown in the figure).

[0064] 3. Ventilation (e.g.) Figure 9 (As shown)

[0065] The second stepper motor 112 is driven by the control switch to close the second air guide plate 111 in the second guide channel 113. At the same time, the second motor 116 in the second volute 115 is operated to drive the second impeller 117 to rotate counterclockwise. After negative pressure is generated in the second air duct area, the indoor air is discharged to the outside through the second volute 115, the second air outlet 9 and the air duct (not shown in the figure) to achieve the ventilation function.

[0066] In this embodiment, the first air duct assembly, the second air duct assembly, and the fresh air duct assembly, when used together, can also provide air blowing, heating, and fresh air modes in the shower area. The specific operation is as follows:

[0067] 1. Using a fan or for heating (such as...) Figure 10 , 11 (As shown)

[0068] By controlling the switch to drive the first stepper motor 63 and the second stepper motor 112, the first air guide plate 61 and the second air guide plate 111 are respectively closed. Simultaneously, the first impeller 67 and the second impeller 117 rotate clockwise, creating negative air pressure in the first air duct area and the second air duct area. The indoor air is then discharged into the room through the first volute 65 and the second volute 115, the first heating block assembly 64 and the second heating block assembly 114, the first guide channel 62 and the second guide channel 113, and the oscillating blade assembly 12, so as to realize the function of blowing air or heating in the shower area.

[0069] 2. Fresh air (such as) Figure 12 (As shown)

[0070] The first stepper motor 63 and the second stepper motor 112 are driven by a control switch (not shown in the figure) to close the first air guide plate 61 and the second air guide plate 111 respectively. At the same time, the third stepper motor 43 opens the air damper 44 in the fresh air duct 41. The first impeller 67 and the second impeller 117 rotate clockwise, so that the air in the first air duct area and the second air duct area is negatively pressured. Then, the outdoor air is discharged into the room through the air inlet 5 connected to the air duct (not shown in the figure), the primary filter 2, the purification device 1, the first volute 65 and the second volute 115, the first heating block assembly 64 and the second heating block assembly 114, the first guide channel 62 and the second guide channel 113, and the oscillating blade assembly 12, so as to realize the introduction of fresh outdoor air into the bathing area.

[0071] In another embodiment, the second air duct assembly includes a second volute and a second motor disposed within the second volute. A second impeller is connected to the shaft of the second motor. A second heating block assembly and a second guide groove are provided at the front end of the second volute. A second air guide plate is provided in the second guide groove. A second stepper motor for opening and closing the second air guide plate is provided on one side of the second guide groove.

[0072] Furthermore, the second volute is equipped with a straight air duct and an arc air duct. The straight air duct and the arc air duct are combined to form the second volute air duct. The air duct opening of the straight air duct is equipped with a second air outlet, which is connected to the air duct for exhausting indoor air. The air duct opening of the arc air duct is equipped with a second guide groove. When the second air guide plate is opened, the second guide groove is connected to the third air outlet to realize the blowing, heating or fresh air mode.

[0073] Specifically, the air duct opening of the straight air duct is directly attached to the second air outlet, ensuring a strong and rapid air exchange effect. The air duct opening of the curved air duct is connected to the third air outlet through the second heating block assembly and the second guide groove. The shaft of the second motor is set at the center of the curved air duct and is tangent to the straight air duct, ensuring the wind speed and effect during rotation.

[0074] The curved air duct is arranged around the second impeller in a circular shape. When the second impeller rotates clockwise under the drive of the second motor, the air outlet of the second air duct assembly becomes the third air outlet, which can exhaust indoor air into the room through the duct attached to the third air outlet. When the second impeller rotates counterclockwise under the drive of the second motor, the air outlet of the second air duct assembly becomes the second air outlet, which can exhaust indoor air to the outside through the duct attached to the second air outlet. The outer surface of the second volute is provided with several reinforcing ribs.

[0075] Furthermore, the louver assembly includes a louver base and a louver top cover, with a rotatable louver blade positioned between the base and cover. A fourth stepper motor is located at the end of the louver blade to drive its rotation. The damper divides the fresh air duct into two parts: one directly connects to the air inlet, and the other connects to the purification device via a pre-filter. The volume ratio of the inner cavity of the fresh air duct assembly to the inner cavities of the first and second volutes is 1:1.5-2.5:2-3.5, resulting in better performance.

[0076] In one specific embodiment, the outer side of the housing has a fresh air inlet and three air outlets, and the shelves are fixed inside the housing; the first air duct assembly, the second air duct assembly, and the fresh air introduction assembly are fixed under the shelves, and the purification device and the louver assembly are mounted on the shelves. The combination of these components achieves the following integrated functionalities:

[0077] 1. A combination of "shower area + wash area" with air conditioning or heating and fresh air modes (e.g.) Figure 15 Show)

[0078] By controlling the switch to drive the first stepper motor 63 and the second stepper motor 112, the first air guide plate 61 is closed and the second air guide plate 111 is opened. Simultaneously, the first impeller 67 and the second impeller 117 rotate clockwise, creating negative air pressure in the first and second air duct areas. The indoor air is then discharged into different areas of the room through the first volute 65 and the second volute 115, the first heating block assembly 64 and the second heating block assembly 114, the first guide channel 62 and the second guide channel 113, and respectively through the oscillating assembly 12 and the air outlet 10, so as to realize the simultaneous blowing or heating function of the bathing area and the washing area.

[0079] In the same "shower area + wash area" air blowing mode as described above, the third stepper motor 43 simultaneously opens the air door 44 in the fresh air duct 41 to introduce fresh outdoor air into the shower area and wash area respectively.

[0080] 2. "Toilet area + washbasin area" with ventilation or heating and fresh air mode (e.g.) Figure 16 Show)

[0081] By controlling the switch to drive the first stepper motor 63 and the second stepper motor 112, the first air guide plate 61 and the second air guide plate 111 are opened, and the first impeller 67 and the second impeller 117 are rotated clockwise simultaneously. After generating negative air pressure in the first air duct area and the second air duct area, the indoor air is discharged into different areas of the room through the first volute 65 and the second volute 115, the first heating block assembly 64 and the second heating block assembly 114, the first guide channel 62 and the second guide channel 113, and respectively through the air outlet 8 and the air outlet 10, so as to realize the function of blowing air or heating in the toilet area and the wash area at the same time.

[0082] In the same "toilet area + wash area" air blowing mode as described above, the third stepper motor 43 simultaneously opens the air door 44 in the fresh air duct 41 to introduce fresh outdoor air into the toilet area and wash area respectively.

[0083] 3. "Toilet area + Shower area" with ventilation or heating and fresh air modes (e.g.) Figure 17 Show)

[0084] By controlling the switch to drive the first stepper motor 63 and the second stepper motor 112, the first air guide plate 61 is opened and the second air guide plate 111 is closed. Simultaneously, the first impeller 67 and the second impeller 117 rotate clockwise, creating negative air pressure in the first and second air duct areas. The indoor air is then discharged into different areas of the room through the first volute 65 and the second volute 115, the first heating block assembly 64 and the second heating block assembly 114, the first guide channel 62 and the second guide channel 113, and through the air outlet 8 and the oscillating assembly 12, respectively, so as to realize the function of blowing air or heating in the toilet area and the shower area at the same time.

[0085] In the same "toilet area + shower area" air blowing mode as described above, the third stepper motor 43 simultaneously opens the air door 44 in the fresh air duct 41 to introduce fresh outdoor air into the toilet area and shower area respectively.

[0086] 4. A combination of ventilation or heating functions with air exchange in the "shower area" (e.g., Figure 18 Show)

[0087] By controlling the switch to drive the first stepper motor 63 and the second stepper motor 112, the first air guide plate 61 and the second air guide plate 111 are closed, and the first impeller 67 is rotated clockwise. After creating negative air pressure in the first air duct area, indoor air is blown into the room or heated through the first volute 65, the first heating block assembly 64, the first guide channel 62, and the oscillating blade assembly 12. Simultaneously, the second impeller 117 rotates counterclockwise, creating negative air pressure in the second air duct area. After creating negative air pressure, indoor air is discharged to the outside through the second volute 115, the second air outlet 9, and the air duct (not shown in the figure) to achieve the ventilation function.

[0088] 5. The combination of ventilation or heating functions in the "toilet area" (e.g., Figure 19 Show)

[0089] The first stepper motor 63 and the second stepper motor 112 are driven by the control switch to open the first air guide plate 61 and close the second air guide plate 111. The first impeller 67 rotates clockwise, creating negative air pressure in the first air duct area. The indoor air is then blown into the room or heated through the first volute 65, the first heating block assembly 64, the first guide channel 62, and the air outlet 8. Simultaneously, the second impeller 117 rotates counterclockwise, creating negative air pressure in the second air duct area. The indoor air is then discharged outdoors through the second volute 115, the second air outlet 9, and the air duct (not shown in the figure) to achieve the ventilation function.

[0090] It should be noted that the present invention, as fully described, can have various modifications and variations, and is not limited to the specific embodiments described above. The above embodiments are merely illustrative of the invention and not intended to limit it. In short, the scope of protection of the present invention should include those modifications, substitutions, and alterations that are obvious to those skilled in the art, and the appended claims shall prevail.

Claims

1. A fresh air and heating device for three zones, comprising a housing, characterized in that, The cabinet is equipped with shelves. Below the fixed shelves are fresh air duct components and two independent air duct components, namely the first air duct component and the second air duct component. The fresh air duct component is connected to the air inlet. Above the shelves are louver components and purification devices. The shelves have through holes for connecting the air duct components and louvers. One side of the cabinet is equipped with an air inlet, and the other side is equipped with three air outlets. Two of the three air outlets are used for indoor and indoor air circulation, and one is used to connect to the outside for air exchange. The first air duct assembly includes a first volute and a first motor disposed within the first volute; the second air duct assembly includes a second volute and a second motor disposed within the second volute; the volume ratio of the inner cavity of the fresh air duct assembly to the inner cavity of the first and second volutes is 1:1.5-2.5:2-3.

5. The second air duct assembly includes a second volute and a second motor disposed inside the second volute. A second impeller is connected to the shaft of the second motor. A second heating block assembly and a second guide channel are provided at the front end of the second volute. A second air guide plate is provided inside the second guide channel. A second stepper motor for opening and closing the second air guide plate is provided on one side of the second guide channel. The second volute is provided with a straight air duct and an arc air duct. The straight air duct and the arc air duct are combined to form the second volute air duct. The air duct opening of the straight air duct is provided with a second air outlet. The air duct opening of the arc air duct is provided with a second guide groove. When the second guide plate is opened, the second guide groove is connected to the third air outlet. The air duct opening of the straight air duct is directly attached to the second air outlet, and the air duct opening of the curved air duct is connected to the third air outlet through the second heating block assembly and the second guide groove. The rotating shaft of the second motor is located at the center of the curved air duct and is tangent to the straight air duct. The first motor shaft is connected to the first impeller, and the air duct of the first volute is provided with a first heating block assembly and a first guide groove in sequence. A first stepper motor is provided on one side of the first guide groove, and a first air guide plate is provided inside the first guide groove. The first air guide plate is connected to the first air outlet for indoor air circulation. The arc-shaped air duct is arranged around the second impeller in a circular shape. When the second impeller rotates clockwise under the drive of the second motor, the air outlet of the second air duct assembly becomes the third air outlet; when the second impeller rotates counterclockwise under the drive of the second motor, the air outlet of the second air duct assembly becomes the second air outlet. The outer surface of the second volute is provided with several reinforcing ribs.

2. A fresh air and heating device for a three-zone system according to claim 1, characterized in that, The fresh air duct assembly includes a fresh air duct and a damper located in the middle of the fresh air duct. A third stepper motor for driving the damper is located on the side of the fresh air duct. A temperature sensor is located at the front end of the damper. A purification device is located above the fresh air duct. One end of the fresh air duct is connected to the air inlet.

3. A fresh air and heating device for a three-zone system according to claim 1, characterized in that, The page-swing assembly includes a page-swing base and a page-swing top cover. A rotatable page-swing piece is provided between the page-swing base and the page-swing top cover. A fourth stepper motor is provided at the end of the page-swing piece to drive the page-swing piece to rotate.

4. A fresh air and heating device for a three-zone system according to claim 2, characterized in that, The damper divides the fresh air duct into two parts: one part is directly connected to the air inlet, and the other part is connected to the purification device through a pre-filter.

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