Fresh air heating ventilation fan

Abstract

The utility model discloses a kind of fresh air heating ventilation fan, including frame main body, first fan and second fan, the frame main body is equipped with frame air inlet, frame first air outlet, frame second air outlet and ventilation port, the frame air inlet, frame first air outlet and frame second air outlet are all communicated with first space, the ventilation port is communicated with second space;The first fan is arranged in one side inside frame main body and located above frame air inlet;The air inlet end of the first fan is communicated with frame air inlet;The second fan is arranged in other side inside frame main body and located above frame second air outlet, the air outlet end of the second fan is communicated with frame second air outlet. Thus, when switching to fresh air mode, second fan can be opened and first fan is closed, fresh air of second space can enter into frame main body through ventilation port and be discharged to first space through frame second air outlet, so that pure fresh air is obtained.

Description

Technical Field

[0001] This utility model relates to the field of bathroom heater technology, and in particular to a fresh air heating and ventilation fan. Background Technology

[0002] Existing bathroom heater structures are typically divided into an air intake zone, a heating zone, and an air outlet zone, arranged sequentially. The air intake zone has an air inlet, the heating zone has a first air outlet, and the air outlet zone has a second air outlet. Additionally, it includes a fan located in the air intake zone and a heating device located in the heating zone. Driven by the fan, bathroom air enters the air intake zone through the air inlet and is then blown towards the heating zone. Under the action of the heating device, the air is heated into hot air. A portion of the hot air is then exhausted to the bathroom through the first air outlet, while the remaining hot air enters the air outlet zone and is exhausted to the bathroom through the second air outlet, thus raising the temperature of the bathroom. Some of these bathroom heaters also have a fresh air function. This is achieved by opening an air exchange port in the air outlet area and setting an upper air intake duct at the top of the fan. Under the action of the fan, fresh outside air can enter the upper air intake duct through the air exchange port, and then be blown to the heating area by the fan and discharged through the first air outlet, thus realizing the fresh air function.

[0003] However, the above-mentioned bathroom heater structure has the following problems during use: when switching to fresh air mode, the air originally located in the bathroom will also be drawn into the bathroom heater under the action of the fan. After mixing with fresh air, it will be discharged to the heating area by the fan and finally discharged from the first air outlet, thus failing to obtain pure fresh air. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a fresh air heating and ventilation fan that can solve the problem mentioned in the background technology that pure fresh air cannot be obtained in fresh air mode.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A fresh air heating and ventilation fan includes:

[0007] The main frame has a frame air inlet, a frame first air outlet, a frame second air outlet, and a ventilation port. The frame air inlet, the frame first air outlet, and the frame second air outlet are all connected to a first space, and the ventilation port is connected to a second space.

[0008] A first fan is disposed inside the main frame body on one side and above the air inlet of the frame; the air inlet of the first fan is connected to the air inlet of the frame.

[0009] The second fan is located inside the main frame body on the other side and above the second air outlet of the frame. The air outlet of the second fan is connected to the second air outlet of the frame.

[0010] Under the action of the second fan, the air in the second space can enter the frame body through the ventilation port and be discharged into the first space through the second air outlet of the frame.

[0011] As an optional implementation, the frame air inlet, the frame first air outlet, and the frame second air outlet are all located at the bottom of the frame body and arranged sequentially along the length of the frame body, and the ventilation port is opened on the side of the frame body and located near the frame second air outlet.

[0012] As an optional implementation, a heating plate is also included, which is disposed within the frame body and located above the first air outlet of the frame, wherein:

[0013] The heating plate divides the interior of the frame body into an upper heating zone and a lower heating zone arranged vertically, and both the upper heating zone and the lower heating zone are connected to the air outlet of the first fan.

[0014] As an optional implementation, a first air valve is provided within the main frame, wherein:

[0015] The first air valve is rotatably disposed at the air exchange port. The first air valve has a first position and a second position. When the first air valve is rotated to the first position, the first air valve opens the air exchange port; when the first air valve is rotated to the second position, the first air valve closes the air exchange port.

[0016] As an optional implementation, a second air valve is also provided within the main frame, wherein:

[0017] The second air valve is rotatably disposed within the upper heating zone. The second air valve has a third position, a fourth position, and a fifth position. When the second air valve is rotated to the third position, the upper heating zone is connected to the air inlet of the second fan and the air exchange port. When the second air valve is rotated to the fourth position, the upper heating zone is not connected to the air inlet of the second fan and the air exchange port. When the second air valve is rotated to the fifth position, the upper heating zone is not connected to the air inlet of the second fan, but is connected to the air exchange port.

[0018] As an optional implementation, a third air valve is also provided within the main frame, wherein:

[0019] The third air valve is rotatably disposed at the air outlet of the first fan, and the third air valve has a sixth position and a seventh position; when the third air valve is rotated to the sixth position, the air outlet of the first fan is connected to the lower heating zone; when the third air valve is rotated to the seventh position, the air outlet of the first fan is not connected to the lower heating zone.

[0020] As an optional implementation, when the first air valve rotates to the second position, the second air valve rotates to the third position, and the third air valve rotates to the sixth position, under the combined action of the first fan, the second fan, and the heating plate, the air in the first space enters the frame body through the frame air inlet. Part of the air enters the lower heating zone and is heated before being blown back into the first space through the frame first air outlet, while the other part of the air enters the upper heating zone and is heated before being blown back into the first space through the frame second air outlet.

[0021] As an optional implementation, when the first air valve rotates to the second position, the second air valve rotates to the third position, and the third air valve rotates to the seventh position, under the combined action of the first fan, the second fan, and the heating plate, the air in the first space enters the frame body through the frame air inlet, enters the upper heating zone and is heated, and then is blown out back into the first space through the frame second air outlet.

[0022] As an optional implementation, when the first air valve rotates to the first position, the second air valve rotates to the fifth position, and the third air valve rotates to the seventh position, under the action of the first fan, the air in the first space enters the frame body through the frame air inlet, flows through the upper heating zone, and is blown out to the second space through the ventilation port.

[0023] As an optional implementation, when the first air valve rotates to the first position and the second air valve rotates to the fourth position, under the action of the second fan, the air in the second space enters the frame body through the ventilation port and is blown out to the first space through the second air outlet of the frame.

[0024] As an optional implementation, it further includes a damper seat disposed within the frame body and located above the second air outlet of the frame, wherein:

[0025] The valve seat has a cavity inside, and the second fan is disposed inside the cavity;

[0026] The bottom of the air valve seat is provided with a first opening that communicates with the cavity, and the first opening is connected to the second air outlet of the frame.

[0027] A second opening communicating with the cavity is provided on one side of the air valve seat, and the second opening is communicating with the air exchange port; the first air valve is rotatably disposed at the second opening of the air valve seat and is used to open or close the second opening;

[0028] The other side of the air valve seat has a third opening that connects to the cavity and is connected to the upper heating zone; the second air valve is rotatably disposed at the third opening of the air valve seat and is used to open or close the third opening.

[0029] As an optional implementation, the valve seat is further provided with a first limiting stop bar located between the second opening and the third opening, wherein:

[0030] When the first air valve is in the first position, the first air valve abuts against one side of the first limiting stop bar; when the second air valve is in the fifth position, the second air valve abuts against the other side of the first limiting stop bar.

[0031] As an optional implementation, the second fan is a cross-flow fan, which includes cross-flow fan blades and a first drive motor for driving the cross-flow fan blades to rotate. The air inlet end of the cross-flow fan blades is connected to the second opening and the third opening, respectively, and the air outlet end of the cross-flow fan blades is connected to the first opening.

[0032] As an optional implementation, the first fan is a centrifugal fan, which includes a volute and an impeller assembly disposed on the volute. The impeller assembly includes a centrifugal impeller and a second drive motor for driving the centrifugal impeller to rotate.

[0033] The bottom of the volute is provided with a volute air inlet that connects to the air inlet of the frame, and the volute air inlet forms the air inlet end of the first fan;

[0034] The volute has an air outlet facing the heating plate on its side. The air outlet is connected to the upper heating zone and the lower heating zone, and forms the air outlet of the first fan. The third air valve is rotatably disposed at the air outlet and is used to open or block the connection between the air outlet and the lower heating zone.

[0035] As an optional implementation, a second limiting strip is provided at the air outlet of the volute. When the third air valve is rotated to the sixth position, the third air valve abuts against the second limiting strip.

[0036] In summary, this utility model has the following technical effects:

[0037] (1) The fresh air heating and ventilation fan of this utility model is provided with a second fan in the frame body. The second fan is located above the second air outlet of the frame. When switching to fresh air mode, the second fan can be turned on and the first fan can be turned off. Under the action of the second fan, it can draw fresh air from the second space into the frame body and discharge it through the second air outlet of the frame. Since the first fan is not working, the air originally located in the first space will not enter the frame body, thus avoiding mixing with the fresh air and obtaining pure fresh air.

[0038] (2) When switching to heating mode, the first fan and the second fan can be turned on at the same time. Under the action of the second fan, the air in the upper heating zone can be driven to be discharged to the first space through the second air outlet of the frame, so that the air is discharged more smoothly and there is no need to increase the power of the first fan, thus avoiding the generation of large working noise.

[0039] (3) When switching to dual-zone heating mode, the first zone and the second zone in the first space can be heated at the same time. In this way, when the user takes a shower in the first zone, the second zone is preheated with a large air volume. When the user walks to the second zone and changes clothes in the second zone after showering, he will not feel cold, thus greatly improving the user experience. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of the fresh air heating and ventilation fan of this utility model;

[0042] Figure 2 This is an explosion diagram of the fresh air heating and ventilation fan of this utility model;

[0043] Figure 3 for Figure 2 An illustration of the explosion from another perspective;

[0044] Figure 4 for Figure 1 A structural diagram from another perspective;

[0045] Figure 5 This is a cross-sectional schematic diagram of the fresh air heating and ventilation fan of this utility model;

[0046] Figure 6 This is a cross-sectional schematic diagram of the fresh air heating and ventilation fan of this utility model in dual-zone heating mode;

[0047] Figure 7 This is a cross-sectional schematic diagram of the fresh air heating and ventilation fan of this utility model in a single-zone centralized heating mode;

[0048] Figure 8 This is a cross-sectional schematic diagram of the fresh air heating and ventilation fan of this utility model in ventilation mode;

[0049] Figure 9 This is a cross-sectional schematic diagram of the fresh air heating and ventilation fan of this utility model in fresh air mode.

[0050] The meanings of the reference numerals in the attached figures are as follows:

[0051] 1. Frame body; 11. Frame body; 111. Ventilation port; 12. Face mask; 121. Frame air inlet; 122. Frame first air outlet; 123. Frame second air outlet; 2. First fan; 21. Volute; 211. Volute air inlet; 212. Volute air outlet; 22. Centrifugal impeller; 23. Second drive motor; 24. Second limit stop bar; 3. Heating plate; 4. Second fan; 5. First air valve; 51. First plate-shaped body; 52. First rotating shaft; 6. Second air valve; 61. Second plate-shaped body; 62. Second rotating shaft; 7. Air valve seat; 71. First opening; 72. Second opening; 73. Third opening; 74. First limit stop bar; 8. Third air valve; 81. Third plate-shaped body; 82. Third rotating shaft; 9. Partition plate; 91. Fourth opening. Detailed Implementation

[0052] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0053] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0054] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0055] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0056] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0057] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0058] Combination Figures 1 to 9 As shown, this application provides a fresh air heating and ventilation fan, which is configured at the top of a first space. This bathroom heater / ventilation fan can provide multiple functions such as heating, ventilation, and fresh air to the first space. Specifically, the bathroom heater / ventilation fan includes a frame body 1, a first fan 2, and a second fan 4. The frame body 1 is provided with a frame air inlet 121, a frame first air outlet 122, a frame second air outlet 123, and a ventilation port 111. The frame air inlet 121, the frame first air outlet 122, and the frame second air outlet 123 are arranged sequentially and are all connected to the first space. The ventilation port 111 is connected to the second space and is close to the frame second air outlet 123. The first fan 2 is located inside the frame body 1 on one side and above the frame air inlet 121. The air inlet end of the first fan 2 is connected to the frame air inlet 121. The second fan 4 is located inside the frame body 1 on the other side and above the frame second air outlet 123. The air outlet end of the second fan 4 is connected to the frame second air outlet 123. Under the action of the second fan 4, the air in the second space can enter the frame body 1 through the air exchange port 111 and be discharged to the first space through the second air outlet 123 of the frame.

[0059] Therefore, by installing a second fan 4 inside the frame body 1, which is located above the second air outlet 123 of the frame, when switching to fresh air mode, the second fan 4 can be turned on and the first fan 2 can be turned off. Under the action of the second fan 4, fresh air from the second space can be drawn into the frame body 1 and discharged through the second air outlet 123 of the frame. Since the first fan 2 is not working, the air originally located in the first space will not enter the frame body 1, thus avoiding mixing with fresh air, and thus pure fresh air can be obtained.

[0060] Specifically, the frame air inlet 121, the frame first air outlet 122 and the frame second air outlet 123 are all located at the bottom of the frame body 1 and are arranged sequentially along the length of the frame body 1. The ventilation port 111 is opened on the side of the frame body 1 and is located near the frame second air outlet 123.

[0061] Preferably, the first space is a bathroom and includes a wet area and a dry area. The shower side is located in the wet area, and both the air inlet 11 and the first air outlet 12 of the frame are connected to the wet area. The changing side is located in the dry area, and the first air outlet 13 of the frame is connected to the dry area. The second space is an outdoor space, where fresh outdoor air can enter the bathroom heater through the ventilation vent 111 and then be discharged into the bathroom through the second air outlet 123 of the frame to provide fresh air.

[0062] More specifically, it also includes a heating plate 3, which is installed inside the frame body 1 and above the first air outlet 122 of the frame. The heating plate 3 divides the interior of the frame body 1 into an upper heating area and a lower heating area arranged vertically. Both the upper heating area and the lower heating area are connected to the air outlet of the first fan. The lower heating area is connected to the first air outlet 122 of the frame. The upper heating area is connected to the air inlet of the second fan 4 and the ventilation port 111.

[0063] Therefore, when switching to heating mode, the first fan 2, the second fan 4, and the heating plate 3 can be turned on simultaneously. Under the action of the first fan 2, the air in the wet area of ​​the bathroom can enter the interior of the frame body 1 through the frame air inlet 121, and then be discharged to the heating area through the first fan 2. Among them, part of the air enters the lower heating area and is heated by the lower end surface of the heating plate 3 before being discharged from the first air outlet 122 of the frame, thus realizing the supply of air for heating the wet area; the other part of the air enters the upper heating area and is heated by the upper end surface of the heating plate 3, then is drawn in by the second fan 4 and discharged from the second air outlet 123 of the frame, thus realizing the supply of air for heating the dry area, thereby achieving simultaneous heating of both the wet and dry areas (airflow direction as follows). Figure 6 (As shown).

[0064] Therefore, by installing a second fan 4 above the second air outlet 123 of the frame, when switching to heating mode, it can drive the air in the upper heating zone to be discharged to the dry area of ​​the bathroom through the second air outlet 123 of the frame, so that the air outlet is smoother and there is no need to increase the power of the first fan 2, thus avoiding the generation of large working noise.

[0065] Preferably, the frame body 1 consists of a rectangular frame 11 with a bottom opening and a face shield 12 covering the bottom of the frame 11. The frame air inlet 121, the frame first air outlet 122, and the frame second air outlet 123 are all opened on the face shield 12, and the ventilation port 111 is opened on the side of the frame 11. By disassembling the frame body 1 into two parts, it is not only convenient to process, but also convenient to install and disassemble other components.

[0066] Preferably, the air inlet 121 and the first air outlet 122 of the frame are grille holes, which can not only reduce dust, insects and other pests from entering the bathroom heater, but also block some water from splashing in, thereby extending its service life; the second air outlet 123 of the frame is a through hole.

[0067] Preferably, the frame body 1 is further provided with a horizontally arranged partition 9, and the partition 9 has a fourth opening 91 that runs vertically through it. The heating plate 3 is located at the fourth opening 91. The partition 9 has flanges that are bent downwards on both the front and rear sides, and the partition is fixed to the inner wall of the frame body 1 by means of the flanges.

[0068] Combination Figure 2-3 as well as Figure 5 As shown, the main frame 1 is equipped with a first air valve 5, which is rotatably mounted at the ventilation port 111. The first air valve 5 has a first position and a second position. When the first air valve 5 is rotated to the first position, the first air valve opens the ventilation port 111 (e.g., ...). Figure 6-7 (As shown); when the first air valve 5 rotates to the second position, the first air valve 5 closes the ventilation port 111 (as shown). Figure 8-9 (As shown). Additionally, a second air valve 6 is also provided within the main frame 1. This second air valve 6 is rotatably mounted within the upper heating zone. The second air valve 6 has a third position, a fourth position, and a fifth position. When the second air valve 6 is rotated to the third position, the upper heating zone is connected to the air inlet of the second fan 4 and the ventilation port 111 (as shown). Figure 6-7 As shown), when the second air valve 6 is rotated to the fourth position, the upper heating zone is not connected to the air inlet of the second fan 4 or the air exchange port 111 (as shown). Figure 9 (As shown); When the second air valve 6 is rotated to the fifth position, the upper heating zone is not connected to the air inlet of the second fan 4, and the upper heating zone is connected to the air exchange port 111 (as shown). Figure 8 (As shown).

[0069] In addition, a third air valve 8 is provided inside the main frame 1. The third air valve 8 is rotatably mounted at the air outlet of the first fan 2. The third air valve 8 has a sixth position and a seventh position. When the third air valve 8 is rotated to the sixth position, the air outlet of the first fan 2 is connected to the lower heating zone (e.g., Figure 6 (As shown); when the third air valve 8 is rotated to the seventh position, the air outlet of the first fan 2 is not connected to the lower heating zone (as shown). Figure 7-9 (As shown).

[0070] Therefore, the bathroom heater of this utility model has multiple working modes:

[0071] When the first air valve 5 rotates to the second position, the second air valve 6 rotates to the third position, and the third air valve 8 rotates to the sixth position, under the combined action of the first fan 2, the second fan 4, and the heating plate 3, air in the wet area of ​​the bathroom can enter the frame body 1 through the frame air inlet 121. Then, some air enters the lower heating zone and is heated before being blown back to the wet area of ​​the bathroom through the frame first air outlet 122. The other part of the air enters the upper heating zone and is heated before being blown back to the dry area of ​​the bathroom through the frame second air outlet 123. This achieves simultaneous heating of both the wet and dry areas of the bathroom. This mode is a dual-zone heating mode (e.g., Figure 6 (As shown).

[0072] In this way, while the user is showering, the dry area of ​​the bathroom is preheated with a large air volume. When the user walks to the dry area to change clothes after showering, they will not feel cold, thus greatly improving the user experience.

[0073] When the first air valve 5 rotates to the second position, the second air valve 6 rotates to the third position, and the third air valve 8 rotates to the seventh position, under the combined action of the first fan 2, the second fan 4, and the heating plate 3, the air in the wet area of ​​the bathroom enters the frame body 1 through the frame air inlet 121. The air then enters the upper heating zone, is heated, and is blown back out to the dry area of ​​the bathroom through the frame second air outlet 12. This mode is a single-zone centralized heating mode (e.g., Figure 7 (As shown).

[0074] In the single-zone centralized heating mode, although no air enters the lower heating zone, the heat generated in the lower heating zone can still flow out through the second air outlet 123 of the frame to achieve dry steam heating of the humid area under the heating effect of the lower end surface of the heating plate 3. When the heating plate 3 is a carbon fiber plate or a graphene plate, the far-infrared rays emitted from the lower end surface of the heating plate 3 can directly pass through the first air outlet 122 of the frame and irradiate the user's skin surface, thereby realizing the far-infrared therapy function.

[0075] When a user changes clothes in the dry area before showering, or walks to the dry area while still wet after showering, the single-zone centralized heating mode can be activated. The large amount of hot air discharged from the second air outlet 123 of the frame can quickly raise the temperature of the dry area of ​​the bathroom, thereby improving the user's comfort before and after showering.

[0076] When the first air valve 5 rotates to the first position, the second air valve 6 rotates to the fifth position, and the third air valve 8 rotates to the seventh position, under the action of the first fan 2, the air in the wet area of ​​the bathroom enters the frame body 1 through the frame air inlet 121, then flows through the upper heating zone and is blown out to the outdoor space through the ventilation port 111, thereby realizing the function of quickly ventilating the bathroom after showering. This mode is the ventilation mode (e.g., Figure 8 (As shown).

[0077] It should be noted that since the air inlet 121 of the frame is connected to the wet area of ​​the bathroom, in order to achieve ventilation of the dry area of ​​the bathroom, the sliding door located between the wet and dry areas can be opened to allow the air in the dry and dry areas to communicate with each other. The air in the dry area can enter the wet area and then be discharged from the wet area to the outside air.

[0078] When the first air valve 5 rotates to the first position and the second air valve 6 rotates to the fourth position, under the action of the second fan 4, air from the outdoor space can enter the frame body 1 through the ventilation port 111, and then be blown out to the wet area of ​​the bathroom through the second air outlet 123 of the frame, thereby providing pure fresh air to the wet area of ​​the bathroom. This mode is the fresh air mode (e.g., Figure 9 (As shown).

[0079] Similarly, when it is necessary to provide fresh air to the dry area of ​​the bathroom, the sliding door between the wet and dry areas can be opened to allow the air in the wet and dry areas to communicate with each other, and the fresh air entering the wet area can enter the dry area to provide fresh air to the dry area.

[0080] Furthermore, it also includes a damper seat 7 disposed within the frame body 1 and located above the second air outlet 123 of the frame. The damper seat 7 has a cavity inside, and the second fan 4 is disposed within the cavity. The bottom of the damper seat 7 has a first opening 71 that communicates with the cavity, and the first opening 71 communicates with the second air outlet 123 of the frame. One side of the damper seat 7 has a second opening 72 that communicates with the cavity, and the second opening 72 communicates with the ventilation port 111. The first damper 5 is rotatably disposed at the second opening 72 of the damper seat 7 and is used to open or block the second opening 72. The other side of the damper seat 7 has a third opening 73 that communicates with the cavity, and the third opening 73 communicates with the upper heating zone. The second damper 6 is rotatably disposed at the third opening 73 of the damper seat 7 and is used to open or block the third opening 73.

[0081] The valve seat 7 is further provided with a first limiting strip 74 located between the second opening 72 and the third opening 73. The first air valve 5 includes a first plate-shaped body 51 and a first rotating shaft 52 disposed on one side of the first plate-shaped body 51. The first rotating shaft 52 is rotatably connected to the valve seat 7. When the first air valve 5 is rotated until the other side of the first plate-shaped body 51 abuts against the inner top wall of the valve seat 7, the first air valve 5 blocks the second opening 72, thereby blocking the ventilation port 111. At this time, the first air valve 5 is in the second position. When the first air valve 5 is rotated until the other side of the first plate-shaped body 51 abuts against the first limiting strip 74, the first air valve 5 opens the second opening 72, thereby opening the ventilation port 111. At this time, the first air valve 5 is in the first position.

[0082] More specifically, the second air valve 6 includes a second plate-shaped main body 61 and a second rotating shaft 62 disposed on one side of the second plate-shaped main body 61. The second rotating shaft 62 is rotatably connected to the air valve seat 7. When the second air valve 6 is rotated until the other side of the second plate-shaped main body 61 abuts against the upper surface of the heating plate 3, the upper heating area is connected to the air inlet of the second fan 4 and the air exchange port 111. At this time, the second air valve 6 is in the third position. When the second air valve 6 is rotated until the other side of the second plate-shaped main body 61 abuts against the inner top wall of the air valve seat 7, the upper heating area is not connected to the air inlet of the second fan 4 and the air exchange port 111. At this time, the second air valve 6 is in the fourth position. When the second air valve 6 is rotated until the other side of the second plate-shaped main body 61 abuts against the first limiting stop bar 74, the upper heating area is connected to the air exchange port 111 and not connected to the air inlet of the second fan 4. At this time, the second air valve 6 is in the fifth position.

[0083] Preferably, the second fan 4 is a cross-flow fan, which includes cross-flow fan blades and a first drive motor for driving the cross-flow fan blades to rotate. The air inlet end of the cross-flow fan blades is connected to the second opening 72 and the third opening 73 respectively, and the air outlet end of the cross-flow fan blades is connected to the first opening 71.

[0084] Preferably, the first fan 2 is a centrifugal fan, which includes a volute 21 and an impeller assembly disposed on the volute 21. The impeller assembly includes a centrifugal impeller 22 and a second drive motor 23 that drives the centrifugal impeller 22 to rotate. The bottom of the volute 21 has a volute inlet 211 that connects to the frame inlet 121, and the volute inlet 211 forms the air inlet end of the first fan 2. The side of the volute 21 has a volute outlet 212 facing the heating plate 3, and the volute outlet 212 connects to the upper heating zone and the lower heating zone respectively, and the volute outlet 212 forms the air outlet end of the first fan 2. The third air valve 8 is rotatably disposed at the volute outlet 212 and is used to open or block the connection between the volute outlet 212 and the lower heating zone.

[0085] Specifically, a second limiting baffle 24 is provided at the air outlet 212 of the volute. The third air valve 8 includes a third plate-shaped main body 81 and a third rotating shaft 82 disposed on one side of the third plate-shaped main body 81. The third rotating shaft 82 is rotatably connected to the volute 21. When the third air valve 8 is rotated until the other side of the third plate-shaped main body 81 abuts against the inner bottom wall of the volute 21, the connection between the air outlet 212 of the volute and the lower heating zone is blocked, and the third air valve 8 is in the seventh position. When the third air valve 8 is rotated until the other side of the third plate-shaped main body 81 abuts against the second limiting baffle 24, the connection between the air outlet 212 of the volute and the lower heating zone is opened, and the third air valve 8 is in the sixth position (e.g., ...). Figure 6 (As shown).

[0086] In summary, this utility model has the following technical effects:

[0087] (I) The fresh air heating and ventilation fan of this utility model is provided with a second fan 4 in the frame body 1. The second fan 4 is located above the second air outlet 123 of the frame. When switching to fresh air mode, the second fan 4 can be turned on and the first fan 2 can be turned off. Under the action of the second fan 4, it can draw fresh air from the second space into the frame body 1 and discharge it through the second air outlet 123 of the frame. Since the first fan 2 is not working, the air originally located in the first space will not enter the frame body 1, thus avoiding mixing with the fresh air, so pure fresh air can be obtained.

[0088] (II) When switching to heating mode, both the first fan 2 and the second fan 4 can be turned on simultaneously. The second fan 4 drives the air in the upper heating zone through the second air outlet 123 of the frame to the first space, resulting in smoother airflow without increasing the power of the first fan 2, thus avoiding excessive operating noise. Furthermore, when the second fan 4 is turned on, it can quickly raise the temperature of the dry area of ​​the bathroom with a large airflow without affecting the wet area, preventing direct airflow into the wet area and improving the user's bathing comfort.

[0089] (iii) When switching to dual-zone heating mode, the first zone and the second zone in the first space can be heated at the same time. In this way, when the user takes a shower in the first zone, the second zone is preheated with a large air volume. When the user walks to the second zone and changes clothes after showering, he will not feel cold, thus greatly improving the user experience.

[0090] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A fresh air heating and ventilation fan, characterized in that, include: The main frame has a frame air inlet, a frame first air outlet, a frame second air outlet, and a ventilation port. The frame air inlet, the frame first air outlet, and the frame second air outlet are all connected to a first space, and the ventilation port is connected to a second space. A first fan is disposed inside the main frame body on one side and above the air inlet of the frame; the air inlet of the first fan is connected to the air inlet of the frame. The second fan is located inside the main frame body on the other side and above the second air outlet of the frame. The air outlet of the second fan is connected to the second air outlet of the frame. Under the action of the second fan, the air in the second space can enter the frame body through the ventilation port and be discharged into the first space through the second air outlet of the frame.

2. The fresh air heating and ventilation fan according to claim 1, characterized in that, The frame air inlet, the frame first air outlet, and the frame second air outlet are all located at the bottom of the frame body and are arranged sequentially along the length of the frame body. The ventilation port is located on the side of the frame body and is located near the frame second air outlet.

3. The fresh air heating and ventilation fan according to claim 1 or 2, characterized in that, It also includes a heating plate, which is disposed within the main frame body and located above the first air outlet of the frame, wherein: The heating plate divides the interior of the frame body into an upper heating zone and a lower heating zone arranged vertically, and both the upper heating zone and the lower heating zone are connected to the air outlet of the first fan.

4. The fresh air heating and ventilation fan according to claim 3, characterized in that: The main frame body is equipped with a first air valve, wherein: The first air valve is rotatably disposed at the air exchange port. The first air valve has a first position and a second position. When the first air valve is rotated to the first position, the first air valve opens the air exchange port; when the first air valve is rotated to the second position, the first air valve closes the air exchange port.

5. The fresh air heating and ventilation fan according to claim 4, characterized in that: The main frame also includes a second air valve, wherein: The second air valve is rotatably disposed within the upper heating zone. The second air valve has a third position, a fourth position, and a fifth position. When the second air valve is rotated to the third position, the upper heating zone is connected to the air inlet of the second fan and the air exchange port. When the second air valve is rotated to the fourth position, the upper heating zone is not connected to the air inlet of the second fan and the air exchange port. When the second air valve is rotated to the fifth position, the upper heating zone is not connected to the air inlet of the second fan, but is connected to the air exchange port.

6. The fresh air heating and ventilation fan according to claim 5, characterized in that: The main frame also includes a third air valve, wherein: The third air valve is rotatably disposed at the air outlet of the first fan, and the third air valve has a sixth position and a seventh position; when the third air valve is rotated to the sixth position, the air outlet of the first fan is connected to the lower heating zone; when the third air valve is rotated to the seventh position, the air outlet of the first fan is not connected to the lower heating zone.

7. The fresh air heating and ventilation fan according to claim 6, characterized in that, When the first air valve rotates to the second position, the second air valve rotates to the third position, and the third air valve rotates to the sixth position, under the combined action of the first fan, the second fan, and the heating plate, the air in the first space enters the frame body through the frame air inlet. Part of the air enters the lower heating zone and is heated before being blown back into the first space through the frame first air outlet. The other part of the air enters the upper heating zone and is heated before being blown back into the first space through the frame second air outlet.

8. The fresh air heating and ventilation fan according to claim 6, characterized in that, When the first air valve rotates to the second position, the second air valve rotates to the third position, and the third air valve rotates to the seventh position, under the combined action of the first fan, the second fan, and the heating plate, the air in the first space enters the frame body through the frame air inlet, enters the upper heating zone and is heated, and then is blown out back into the first space through the frame second air outlet.

9. The fresh air heating and ventilation fan according to claim 6, characterized in that, When the first air valve rotates to the first position, the second air valve rotates to the fifth position, and the third air valve rotates to the seventh position, under the action of the first fan, the air in the first space enters the frame body through the frame air inlet, flows through the upper heating zone, and is blown out to the second space through the ventilation port.

10. The fresh air heating and ventilation fan according to claim 6, characterized in that, When the first air valve rotates to the first position and the second air valve rotates to the fourth position, under the action of the second fan, the air in the second space enters the frame body through the air exchange port and is blown out to the first space through the second air outlet of the frame.

11. The fresh air heating and ventilation fan according to any one of claims 5-10, characterized in that, It also includes a damper seat disposed within the main body of the frame and located at the upper end of the second air outlet of the frame, wherein: The valve seat has a cavity inside, and the second fan is disposed inside the cavity; The bottom of the air valve seat is provided with a first opening that communicates with the cavity, and the first opening is connected to the second air outlet of the frame. A second opening communicating with the cavity is provided on one side of the air valve seat, and the second opening is communicating with the air exchange port; the first air valve is rotatably disposed at the second opening of the air valve seat and is used to open or close the second opening; The other side of the air valve seat has a third opening that connects to the cavity and is connected to the upper heating zone; the second air valve is rotatably disposed at the third opening of the air valve seat and is used to open or close the third opening.

12. The fresh air heating and ventilation fan according to claim 11, characterized in that, The valve seat is further provided with a first limiting stop bar located between the second opening and the third opening, wherein: When the first air valve is in the first position, the first air valve abuts against one side of the first limiting stop bar; when the second air valve is in the fifth position, the second air valve abuts against the other side of the first limiting stop bar.

13. The fresh air heating and ventilation fan according to claim 11, characterized in that: The second fan is a cross-flow fan, which includes cross-flow fan blades and a first drive motor that drives the cross-flow fan blades to rotate. The air inlet end of the cross-flow fan blades is connected to the second opening and the third opening, respectively, and the air outlet end of the cross-flow fan blades is connected to the first opening.

14. The fresh air heating and ventilation fan according to any one of claims 6-10, characterized in that: The first fan is a centrifugal fan, which includes a volute and an impeller assembly disposed on the volute. The impeller assembly includes a centrifugal impeller and a second drive motor that drives the centrifugal impeller to rotate. The bottom of the volute is provided with a volute air inlet that connects to the air inlet of the frame, and the volute air inlet forms the air inlet end of the first fan; The volute has an air outlet facing the heating plate on its side. The air outlet is connected to the upper heating zone and the lower heating zone, and forms the air outlet of the first fan. The third air valve is rotatably disposed at the air outlet and is used to open or block the connection between the air outlet and the lower heating zone.

15. The fresh air heating and ventilation fan according to claim 14, characterized in that: A second limiting strip is provided at the air outlet of the volute. When the third air valve is rotated to the sixth position, the third air valve abuts against the second limiting strip.

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