Fresh air module, fresh air air conditioner and control method thereof

Abstract

The application provides a fresh air module, a fresh air conditioner and a control method thereof, wherein the fresh air module comprises a shell and a switching valve, the shell is provided with a fresh air inlet, an indoor return air inlet and an exhaust air vent, a fan is further installed in the shell, the fan has a fan inlet, the switching valve is movably installed in the shell and is provided with a first air duct and a second air duct which are independent of each other, the switching valve has a first position and a second position when moving in the shell, when the switching valve is in the first position, the first air duct connects the fresh air inlet and the fan inlet, when the switching valve is in the second position, the first air duct connects the indoor return air inlet and the fan inlet, and the second air duct connects the exhaust air vent and the fresh air inlet. The fresh air module provided by the application can solve the technical problem of high production cost of the existing fresh air conditioner.

Description

Technical Field

[0001] This application relates to the field of fresh air conditioning technology, and in particular to a fresh air module, a fresh air conditioner and its control method. Background Technology

[0002] As people have higher and higher requirements for indoor air quality, many existing air conditioners integrate fresh air function, exhaust function and indoor circulation and purification function, and switch between functions through a switching valve set in the fresh air module, thereby effectively improving indoor air quality.

[0003] However, in some existing fresh air conditioners, switching between two different functions requires two switching valves, which in turn require two motors. This results in a large number of internal components in the fresh air conditioner, which affects production efficiency and leads to higher costs. Summary of the Invention

[0004] This application provides a fresh air module to solve the technical problem of high production costs of existing fresh air conditioners.

[0005] To achieve the above objectives, the fresh air module proposed in this application includes a housing and a switching valve. The housing is provided with a fresh air inlet, an indoor return air inlet, and an exhaust vent. A fan is also installed inside the housing, and the fan has a fan inlet. The switching valve is movably installed inside the housing and is provided with a first air duct and a second air duct that are independent of each other. The switching valve moves within the housing and has a first position and a second position. The airflow direction at the inlet end of the first air duct, the airflow direction at the inlet end of the second air duct, and the airflow direction at the outlet end of the second air duct are all in a first plane, and the airflow direction at the outlet end of the first air duct is in a second plane. When the switching valve is in the first position, the first air duct connects the fresh air inlet and the fan inlet. When the switching valve is in the second position, the first air duct connects the indoor return air inlet and the fan inlet, and the second air duct connects the exhaust vent and the fresh air inlet.

[0006] Optionally, in one embodiment, the housing is provided with an air inlet chamber, the switching valve is rotatably installed in the air inlet chamber and divides the air inlet chamber into a first air chamber and a second air chamber, the fan inlet is connected to the first air chamber, the fresh air inlet, the indoor return air inlet and the exhaust vent are located in the second air chamber; the first air duct extends from the first air chamber to the second air chamber, and the second air duct is located in the second air chamber.

[0007] Optionally, in one embodiment, the switching valve includes a partition plate having a first surface facing the fan inlet, the first surface having a recessed portion recessed into the second air cavity, the recessed portion communicating with the second air cavity to form the first air duct.

[0008] Optionally, in one embodiment, the recess is located at the edge of the partition plate and is recessed into the second air cavity together with a portion of the edge of the partition plate; and / or, the recess has a recessed surface facing the air inlet of the fan, the recessed surface being an arc surface.

[0009] Optionally, in one embodiment, the partition plate further has a second surface facing away from the fan inlet, and the second surface is provided with a first air guide plate and a second air guide plate spaced apart from each other, forming a second air duct between the first air guide plate and the second air guide plate.

[0010] Optionally, in one embodiment, the first air guide plate extends along the diameter of the partition plate and at least partially passes through the central axis of the partition plate; the fresh air module further includes the drive motor, which is arranged corresponding to the central axis of the partition plate and connected to the first air guide plate.

[0011] Optionally, in one embodiment, the first air duct has a first air inlet, and in the axial direction of the switching valve, the height of the first air inlet is the same as the height of the first air guide plate and the second air guide plate; and / or, the second air duct has a second air inlet and a second air outlet, and the orthographic projection of the switching valve in its axial direction is a circular structure, and the arc lengths corresponding to the first air inlet, the second air inlet and the second air outlet are equal.

[0012] Optionally, in one embodiment, the second air guide plate is an arc-shaped plate and is bent toward the side where the first air guide plate is located.

[0013] Optionally, in one embodiment, the housing is further provided with a fresh air interface, a return air interface, and an exhaust air interface. The fresh air interface, the return air interface, and the exhaust air interface are respectively connected to the fresh air inlet, the indoor return air inlet, and the exhaust air vent. The fresh air interface, the return air interface, and the exhaust air interface are arranged in a ring, and the interval angle between them is 120°. The switching valve is rotatably installed between the fresh air interface, the return air interface, and the exhaust air interface.

[0014] Optionally, in one embodiment, the fan further has a fan outlet, and the housing is also provided with an indoor air outlet communicating with the fan outlet; the fresh air module further includes a switching valve, the switching valve including a base and a lifting cover, the base being installed on the housing and having an air passage space, the air passage space having a first air passage, a second air passage and a third air passage; the first air passage is communicating with the indoor air outlet, the second air outlet is communicating with the exhaust vent, the third air passage is used to communicate with the indoor space, and the lifting cover is movably installed on the third air passage and is used to open or close the third air passage.

[0015] This application also proposes a fresh air conditioner, which includes the aforementioned fresh air module.

[0016] This application also proposes a control method for a fresh air conditioning unit, wherein the fresh air conditioning unit includes the aforementioned fresh air module, and the control method includes:

[0017] Real-time monitoring of the opening and closing status of the fresh air module;

[0018] When the fresh air module is detected to be turned on, the indoor pollutant concentration is obtained and compared with a preset concentration range;

[0019] When the concentration of the pollutant is less than the preset concentration range, the switching valve is controlled to move to the second position, and the lifting cover is controlled to open the third air vent.

[0020] When the pollutant concentration is within the preset concentration range, the switching valve is controlled to move to the second position, and the lifting cover is controlled to close the third air vent.

[0021] When the concentration of the pollutant is greater than the preset concentration range, the switching valve is controlled to switch to the first position, and the lifting cover is controlled to open the third air vent.

[0022] The fresh air module provided in this application features independent first and second air ducts on its switching valve. When the switching valve is in the first position, the first air duct connects the fresh air inlet and the fan inlet, thus enabling the fresh air function. When the switching valve is in the second position, the first air duct connects the indoor return air inlet and the fan inlet, while the second air duct connects the exhaust vent and the fresh air inlet, thus enabling either the exhaust function or the indoor circulation and purification function. In other words, the fresh air module of this application achieves switching between different functions through a single switching valve, thereby reducing the number of components, lowering production costs, and effectively solving the technical problem of high production costs in existing fresh air conditioning systems. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is an exploded view of the structure of an embodiment of the fresh air module of this application;

[0025] Figure 2 This is a structural cross-sectional view of an embodiment of the fresh air module of this application;

[0026] Figure 3 This is a schematic diagram of the structure of a switching valve in the fresh air module of this application;

[0027] Figure 4 This is a schematic diagram of another embodiment of the switching valve in the fresh air module of this application;

[0028] Figure 5 This is a schematic diagram of the structure of one embodiment of the housing in the fresh air module of this application;

[0029] Figure 6 This is a schematic diagram of the airflow direction in one embodiment of the fresh air module of this application when introducing fresh air;

[0030] Figure 7 This is a schematic diagram of the airflow direction in one embodiment of the fresh air module of this application during internal circulation purification;

[0031] Figure 8 This is a schematic diagram of the airflow direction in one embodiment of the fresh air module of this application when exhausting stale air;

[0032] Figure 9 This is a schematic flowchart of an embodiment of the control method for a fresh air conditioning system according to this application.

[0033] Explanation of icon numbers:

[0034] label name label name label name 10 Fresh air module 210 Snail shell 4321 concave surface 20 case 30 Fan 433 Second surface 21 Fresh air intake 31 Fan inlet 434 First air guide plate 22 Indoor return air vent 40 Switching valve 435 Second air guide plate 23 Exhaust vent 41 First Wind Path 50 drive motor 24 air intake chamber 411 First air inlet 60 Switch valve 241 First wind chamber 412 First air outlet 61 base 242 Second air chamber 42 Second air duct 611 air passage space 25 Fresh air interface 421 Second air inlet 612 First wind gap 26 Return air interface 422 Second air outlet 613 Second air vent 27 Exhaust port 43 partition 614 Third air vent 28 Indoor air outlet 431 First surface 62 Lifting lid 29 Air intake casing 432 concave part 70 Filter

[0035] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] This application provides a fresh air module to address the problem of high production costs in existing fresh air conditioning systems. The following description, in conjunction with the accompanying drawings, will illustrate this solution.

[0038] In the embodiments of this application, such as Figure 1 and Figure 2 As shown, the fresh air module 10 includes a housing 20 and a switching valve 40, wherein, as Figure 2 or Figure 5 As shown, the housing 20 is equipped with a fresh air inlet 21, an indoor return air inlet 22, and an exhaust vent 23. Please refer to... Figure 1 The housing 20 also houses a fan 30, which has an air inlet 31. Specifically, please refer to... Figure 1 and Figure 2 In this embodiment, the housing 20 includes an air inlet housing 29 and a volute housing 210 connected to each other. A fan 30 is installed inside the volute housing 210. The fan 30 has a fan inlet 31 and a fan outlet (not shown). The volute housing 210 has an air outlet cavity (not shown) communicating with the fan outlet. The volute housing 210 has an indoor air outlet 28 communicating with the air outlet cavity (e.g., ...). Figure 1 As shown), after the fan 30 is started, the air flows through the fan inlet 31, the fan outlet, the air outlet cavity and the indoor air outlet 28 in sequence, and then blows into the room or into the target space (such as other air cavities or air ducts).

[0039] like Figure 2 or Figure 5As shown, the fresh air inlet 21, indoor return air inlet 22, and exhaust vent 23 are all located on the air inlet housing 29. The fresh air inlet 21 connects to the outside, typically via a fresh air duct. When the fresh air function is activated, fresh air is drawn in through the fresh air inlet 21; conversely, when the exhaust function is activated, stale indoor air is exhausted through the fresh air inlet 21. The indoor return air inlet 22 connects to the indoor environment. When the indoor air circulation and purification function is activated, indoor air is blown into the fresh air module 10 through the indoor return air inlet 22, purified by the filter 70 within the fresh air module 10, and then blown back into the room, thus achieving air purification. The exhaust vent 23 can be connected to any one of the fan outlet, the air outlet chamber, or the indoor air outlet 28. When the exhaust function is activated, the stale air blown from the fan outlet can flow from the exhaust vent 23 into the exhaust duct (which is the second air duct 42 in this design), and then out through the fresh air inlet 21. To prevent the inhaled fresh air or purified indoor recirculated air from being blown out again from the exhaust vent 23, a switch valve 60 can be installed at the exhaust vent 23 to close it when exhaust is not needed. Alternatively, the airflow distance between the exhaust vent 23 and the fan outlet can be greater than the airflow distance between the indoor air outlet 28 and the fan outlet. This prevents the exhaust vent 23 from affecting the fresh air function and the indoor recirculation and purification function. When exhaust is needed, the indoor air outlet 28 can be closed via the valve, allowing air to continue flowing to the exhaust vent 23.

[0040] The size, shape, and material of the housing 20 are not limited here and can be designed according to the actual situation. The layout of the fresh air inlet 21, the indoor return air inlet 22, and the exhaust vent 23 needs to be designed in coordination with the structure and movement of the switching valve 40 so that the corresponding vents can perform ventilation functions when the switching valve 40 is moved to different positions.

[0041] Specifically, in this embodiment, please refer to Figure 1 and Figure 2 The switching valve 40 is movably installed within the housing 20 and has independent first air ducts 41 and second air ducts 42. The switching valve 40 moves within the housing 20 and has a first position and a second position; wherein the airflow direction at the air inlet of the first air duct 41, the airflow direction at the air inlet of the second air duct 42, and the airflow direction at the air outlet of the second air duct 42 are in a first plane, and the airflow direction at the air outlet of the first air duct 41 is in a second plane; for example... Figure 6 As shown, when the switching valve 40 is in the first position, the first air duct 41 connects the fresh air inlet 21 and the fan inlet 31; Figure 7 or Figure 8As shown, when the switching valve 40 is in the second position, the first air duct 41 connects the indoor return air vent 22 and the fan air inlet 31, and the second air duct 42 connects the exhaust vent 23 and the fresh air inlet 21.

[0042] To achieve the above solution, the specific structure and operation mode of the switching valve 40 can be selected in various ways. For example, the switching valve 40 is a disc structure and is rotatably installed at the fan inlet 31. The first air duct 41 inside the switching valve 40 extends from the side surface of the switching valve 40 to the bottom surface of its disc, and the first air inlet 411 and the first air outlet 412 are formed on the side surface of the switching valve 40 and the bottom surface of the disc, respectively. The second air duct 42 penetrates the side surface of the switching valve 40, thereby forming the second air inlet 421 and the second air outlet 422 on the side surface of the switching valve 40. The first air outlet 412 is connected to the fan inlet 31. The first air inlet 411, the second air inlet 421 and the second air outlet 422 are all located on the same virtual cylindrical surface. The fresh air inlet 21, the indoor return air inlet 22 and the exhaust vent 23 on the housing 20 surround the outer periphery of the switching valve 40. At this time, the switching valve 40 can be rotated to the first position, and in the first position, the first air outlet 412 of the first air duct 41 is connected to the fan inlet 31, and the first air inlet 411 of the first air duct 41 is connected to the fresh air inlet 21, thereby achieving the purpose of connecting the fresh air inlet 21 and the fan inlet 31 through the first air duct 41. The switching valve 40 can also be rotated to the second position, and in the second position, the first air outlet 412 of the first air duct 41 is connected to the fan inlet 31, and the first air inlet 411 of the first air duct 41 is connected to the indoor return air inlet 22, thereby connecting the fresh air inlet 21 and the fan inlet 31. At the same time, the second air inlet 421 of the second air duct 42 is connected to the exhaust vent 23, and the second air outlet 422 of the second air duct 42 is connected to the fresh air inlet 21, thereby connecting the exhaust vent 23 and the fresh air inlet 21.

[0043] It should be noted that, in the above embodiments, the first plane containing the airflow direction at the air inlet end of the first air duct 41, the airflow direction at the air inlet end of the second air duct 42, and the airflow direction at the air outlet end of the second air duct 42 is perpendicular to the rotation axis of the switching valve 40, and the second plane containing the airflow direction at the air outlet end of the first air duct 41 is parallel to the rotation axis of the switching valve 40.

[0044] For example, the switching valve 40 can be a square slider structure and slidably installed inside the housing 20. The first air duct 41 and the second air duct 42 both extend along the length of the switching valve 40 and are spaced apart from each other. The first air outlet 412 of the first air duct 41 is located on the front of the switching valve 40 and remains connected to the fan inlet 31 during the sliding stroke of the switching valve 40. The first air inlet 411 of the first air duct 41, the second air inlet 421 of the second air duct 42, and the second air outlet 422 are all formed on the back of the switching valve 40. The fresh air inlet 21, the indoor return air inlet 22, and the exhaust vent 23 on the housing 20 are arranged side-by-side and spaced apart along the length of the switching valve 40. In this case, the switching valve 40 can be slid so that when it slides to the first position, the first air duct 41 connects the fan inlet 31 and the fresh air inlet 21 to achieve the fresh air function. When the switching valve 40 continues to slide to the second position, the first air duct 41 connects the indoor return air vent 22 and the fan air inlet 31, while the second air duct 42 connects the exhaust vent 23 and the fresh air inlet 21 to achieve the exhaust function or indoor circulation and purification function.

[0045] It should be noted that when the switching valve 40 is in the first position, the second air duct 42 can connect the indoor return air vent 22 and the exhaust air vent 23, or it can be offset from the indoor return air vent 22 and the exhaust air vent 23, as long as it does not affect the intake of fresh air. In addition, the size of the switching valve 40, the size and length of the first air duct 41 and the second air duct 42 are not limited here, and can be flexibly designed according to the actual situation.

[0046] In summary, the fresh air module 10 provided in this application, by setting independent first air ducts 41 and second air ducts 42 on its switching valve 40, allows for fresh air function when the switching valve 40 is in the first position. When the switching valve 40 is in the second position, the first air duct 41 connects the fresh air inlet 21 and the fan inlet 31; when the switching valve 40 is in the third position, the first air duct 41 connects the indoor return air inlet 22 and the fan inlet 31, while the second air duct 42 connects the exhaust vent 23 and the fresh air inlet 21. This allows for either exhaust function or indoor air circulation and purification function. In other words, the fresh air module 10 of this application achieves switching between different functions through a single switching valve 40, thereby saving on the number of components, reducing production costs, and effectively solving the technical problem of high production costs in existing fresh air conditioning systems.

[0047] Optionally, in one embodiment, please combine Figure 1 and Figure 2The housing 20 contains an air inlet chamber 24. Specifically, in this embodiment, the air inlet chamber 24 is formed by an air inlet shell 29 and a volute shell 210. The air inlet chamber 24 is connected to the fan inlet 31. The switching valve 40 is rotatably installed inside the air inlet chamber 24 and divides the air inlet chamber 24 into a first air chamber 241 and a second air chamber 242. The size ratio of the first air chamber 241 and the second air chamber 242 is not limited and can be designed according to actual needs. The fan inlet 31 is connected to the first air chamber 241. The fresh air inlet 21, the indoor return air inlet 22, and the exhaust vent 23 are located in the second air chamber 242. That is, the switching valve 40 separates the three air inlets—fresh air inlet 21, indoor return air inlet 22, and exhaust vent 23—from the fan inlet 31 into different air chambers. Therefore, the connection between the various air inlets on the fresh air module 10 needs to be achieved through the switching valve 40. Specifically, the first air duct 41 extends from the first air cavity 241 to the second air cavity 242, thus maintaining communication with the fan inlet 31. By rotating the switching valve 40 to different positions, one can select either the fresh air inlet 21 or the indoor return air inlet 22, thus selecting different functions. The second air duct 42 is located within the second air cavity 242. When the switching valve 40 is rotated to different positions, the second air duct 42 can connect any two of the fresh air inlet 21, the indoor return air inlet 22, and the exhaust vent 23, thereby achieving different functions.

[0048] It is understandable that the switching valve 40 switches between the first and second positions by rotation, which not only facilitates control but also avoids the situation where the switching valve 40 occupies a large amount of space when it moves.

[0049] In addition, in this embodiment, the air inlet chamber 24 is divided into a first air chamber 241 and a second air chamber 242 by the switching valve 40. This makes it easier for the first air duct 41 and the second air duct 42 of the switching valve 40 to connect with the corresponding air outlet, thereby simplifying the structure of the switching valve 40 and making it easier to process the first air duct 41 and the second air duct 42 on the switching valve 40.

[0050] It should be noted that when the second air duct 42 can effectively separate the temporarily unused air vents on the housing 20 from the fan inlet 31, the first air chamber 241 and the second air chamber 242 can be partially connected, for example, when the first switching valve 40 is in the first position, the second air duct 42 connects the indoor return air vent 22 and the exhaust air vent 23. At this time, both the indoor return air vent 22 and the exhaust air vent 23 are separated from the fan inlet 31, which has no impact on the current fresh air function. In this case, the impact of the partial connection between the first air chamber 241 and the second air chamber 242 is not significant.

[0051] Optionally, in one embodiment, please combine Figures 2 to 4 The switching valve 40 includes a partition plate 43. The partition plate 43 has a first surface 431 facing the fan inlet 31. The first surface 431 has a recessed portion 432 that is recessed into the second air cavity 242. The recessed portion 432 communicates with the second air cavity 242 to form the first air duct 41. Specifically, in this embodiment, to facilitate the rotation of the switching valve 40, the overall shape of the partition plate 43 is circular (its orthographic projection along its axis is circular). The partition plate 43 is set corresponding to the fan inlet 31 and divides the air inlet cavity 24 into a first air cavity 241 and a second air cavity 242. Thus, the partition plate 43 will have a first surface 431 facing the fan inlet 31. The recess 432 of the first surface 431 can be formed by bending or stamping the partition plate 43, and when installed in the housing 20, it is recessed into the second air cavity 242. A connecting opening can be opened on the side of the recess 432 so that the recess 432 can connect the first air cavity 241 and the second air cavity 242, thereby forming the first air duct 41.

[0052] The recess 432 can be recessed in the middle of the partition plate 43, in which case the recess 432 needs to have a connecting opening (i.e., the first air inlet 411) to connect with the second air cavity 242. Alternatively, it can be recessed at the edge of the partition plate 43, in which case the recess 432 can naturally connect with the second air inlet 24. It can be understood that by providing the recess 432 on the partition plate 43 to form the first air duct 41, it is not only easier to process the first air duct 41 on the switching valve 40, but also makes the structure of the switching valve 40 simpler and easier to manufacture.

[0053] Optionally, in one embodiment, please combine Figure 2 and Figure 4 The recessed portion 432 is located at the edge of the partition plate 43, and a portion of the edge of the partition plate 43, together with the recessed portion 432, is recessed into the second air cavity 242. Specifically, when processing the recessed portion 432, it can be directly pressed out at the edge of the partition plate 43 by stamping, which is very quick and convenient. Therefore, this design not only makes the first air duct 41 easier to process, but also increases the air intake volume of the first air duct 41.

[0054] Optionally, in one embodiment, such as Figure 4 As shown, the recessed portion 432 has a recessed surface 4321 facing the air inlet 31 of the fan. The recessed surface 4321 is an arc surface. It can be understood that the arc surface structure can play a guiding role, thereby reducing the air flow resistance in the first air duct 41 and improving the air volume and air output efficiency.

[0055] Optionally, in one embodiment, please combine Figure 2 and Figure 3 The partition plate 43 also has a second surface 433 facing away from the fan inlet 31, that is, the second surface 433 is located in the second air cavity 242. The second surface 433 is provided with a first air guide plate 434 and a second air guide plate 435 that are spaced apart from each other. The second air duct 42 is formed between the first air guide plate 434 and the second air guide plate 435. Specifically, in this embodiment, the housing 20 includes an air inlet housing 29 and a volute housing 210 connected to each other. The air inlet housing 29 and the volute housing 210 together enclose the air inlet cavity 24. The air inlet housing 29 has a top wall facing the air inlet 31 of the fan. When the switching valve 40 is installed in the air inlet cavity 24, the second surface 433 faces the top wall of the air inlet housing 29. The first air guide plate 434 and the second air guide plate 435 both abut against the top wall of the air inlet housing 29. Thus, the second surface 433, the first air guide plate 434, the second air guide plate 435 and the top wall of the air inlet housing 29 together form the second air duct 42. Since the switching valve 40 is rotating, the top wall portion corresponding to the second air duct 42 also changes.

[0056] It is understood that by forming the second air duct 42 by setting mutually spaced first air guide plates 434 and second air guide plates 435 on the second surface 433 of the partition plate 43, the structure of the switching valve 40 can be simplified. The length, spacing, and shape of the first air guide plates 434 and second air guide plates 435 are not limited here; they can be designed to match the size and spacing of the various air vents on the housing 20, as long as they can effectively connect the corresponding air vents. For example, in one embodiment, the second air guide plate 435 has an arc-shaped structure, which can reduce airflow resistance and increase the delivered air volume.

[0057] Optionally, in one embodiment, please combine Figure 1 and Figure 3 The first air guide plate 434 extends along the diameter of the partition plate 43 and at least partially passes through the central axis of the partition plate 43. At this time, the second air guide plate 435 and the recessed portion 432 are located on opposite sides of the first air guide plate 434. The fresh air module 10 also includes the drive motor 50, which is mounted on the air inlet housing 29 and positioned corresponding to the central axis of the partition plate 43, and connected to the first air guide plate 434. When the drive motor 50 is started, the motor applies torque to the first air guide plate 434. Because the first air guide plate 434 extends along the diameter of the partition plate 43, i.e., the first air guide plate 434 is located in the middle of the partition plate 43, the motor can effectively drive the entire switching valve 40 to rotate. In specific implementations, the length of the first air guide plate 434 can be equal to the diameter of the partition plate 43, thereby making the force exerted by the first air guide plate 434 on the partition plate 43 more uniform, and thus better driving the entire switching valve 40 to rotate.

[0058] Optionally, in one embodiment, such as Figure 3 As shown, the first air duct 41 has a first air inlet 411. In the axial direction of the switching valve 40, the height of the first air inlet 411 is the same as the height of the first air guide plate 434 and the second air guide plate 435; and / or, the second air duct 42 has a second air inlet 421 and a second air outlet 422. The orthographic projection of the switching valve 40 in its axial direction is a circular structure, and the arc lengths corresponding to the first air inlet 411, the second air inlet 421 and the second air outlet 422 are equal.

[0059] Specifically, since the first air duct 41 is formed by the recessed portion 432 recessed from the first surface 431 toward the second surface 433, the height of the first air inlet 411 refers to the height of the recessed portion 432 recessed toward the second surface 433 at the first air inlet 411 (i.e., at the edge of the partition plate 43), with the first surface 431 as the reference. And since the second air duct 42 is formed by the first air guide plate 434 and the second air guide plate 435 spaced apart, the height of the first air guide plate 434 and the second air guide plate 435 is the height of the second air duct 42, the second air inlet 421, and the second air outlet 422. Therefore, when the height of the first air inlet 411 is the same as the height of the first air guide plate 434 and the second air guide plate 435, the heights of the first air inlet 411, the second air inlet 421, and the second air outlet 422 can be the same. Furthermore, in this embodiment, the arc lengths corresponding to the first air inlet 411, the second air inlet 421, and the second air outlet 422 are equal, which means that the extension widths of the first air inlet 411, the second air inlet 421, and the second air outlet 422 are equal. Therefore, it can be understood that when the height and extension width of the first air inlet 411, the second air inlet 421, and the second air outlet 422 are the same, the sizes of the first air inlet 411, the second air inlet 421, and the second air outlet 422 are the same, thereby better switching and connecting between the fresh air inlet 21, the indoor return air inlet 22, and the exhaust vent 23, avoiding air leakage or airflow loss caused by different opening sizes.

[0060] Optionally, in one embodiment, such as Figure 3 As shown, the second air guide plate 435 is an arc-shaped plate and bends toward the side where the first air guide plate 434 is located. As a result, when the airflow flows in the second air duct 42, it can flow to the second air outlet 422 more quickly under the guidance of the second air guide plate 435, thereby improving the air exchange efficiency and air exchange volume.

[0061] Optionally, in one embodiment, please combine Figure 2 and Figure 5The housing 20 is further provided with a fresh air interface 25, a return air interface 26, and an exhaust air interface 27. The fresh air interface 25, the return air interface 26, and the exhaust air interface 27 are respectively connected to the fresh air inlet 21, the indoor return air inlet 22, and the exhaust air vent 23. The fresh air interface 25, the return air interface 26, and the exhaust air interface 27 are arranged in a ring, and the interval angle between them is 120°. The switching valve 40 is rotatably installed between the fresh air interface 25, the return air interface 26, and the exhaust air interface 27. Understandably, this design not only facilitates the control of the rotation of the switching valve 40, ensuring accurate connection between the air duct (referring to the first air duct 41 and the second air duct 42) and each air outlet (referring to the fresh air inlet 21, the indoor return air outlet 22, and the exhaust air outlet 23) when the switching valve 40 rotates to the corresponding position, but also ensures that the fresh air inlet 21, the indoor return air outlet 22, and the exhaust air outlet 23 can all be connected to the first air duct 41 or the second air duct 42 every 120° rotation of the switching valve 40. This not only simplifies the control logic of the switching valve 40, but also prevents air ducts or air outlets that are not currently ventilated from leaking air into the fresh air module 10.

[0062] It should be noted that the connection channel between the fresh air interface 25 and the fresh air inlet 21, or the connection channel between the return air interface 26 and the indoor return air inlet 22, or the connection channel between the exhaust air interface 27 and the exhaust air vent 23 can be a straight channel or a bent channel. The specific design can be flexibly designed according to the positional relationship between the interface and the corresponding air outlet, as long as they can be interconnected.

[0063] Optionally, in one embodiment, please combine Figure 1 and Figure 2 The fan 30 also has a fan outlet, and the housing 20 is also provided with an indoor air outlet 28 that communicates with the fan outlet; the fresh air module 10 also includes a switch valve 60, which includes a base 61 and a lifting cover 62. The base 61 is installed on the housing 20 and is provided with an air passage space 611. The air passage space 611 has a first air passage 612, a second air passage 613 and a third air passage 614. The first air passage 612 communicates with the indoor air outlet 28, the second air passage 613 communicates with the exhaust vent 23, and the third air passage 614 is used to communicate with the indoor environment. The lifting cover 62 is movably installed on the third air passage 614 and is used to open or close the third air passage 614.

[0064] Specifically, in this embodiment, when ventilation is required, such as Figure 7As shown, it is necessary to control the switching valve 40 to move to the second position and control the lifting cover 62 to close the third air inlet 614. At this time, the first air duct 41 connects the indoor return air inlet 22 and the fan inlet 31, and the second air duct 42 connects the exhaust vent 23 and the fresh air inlet 21. Thus, the indoor stale air can pass through the indoor return air inlet 22, the first air duct 41, the fan inlet 31, the fan outlet, the indoor outlet 28, the first air inlet 612, the air passage space 611, the second air inlet 613, the exhaust vent 23, the second air duct 42, and the fresh air inlet 21 in sequence to be discharged to the outside.

[0065] like Figure 6 As shown, when indoor air circulation and purification are required, the switching valve 40 needs to be moved to the second position, and the lifting cover 62 needs to be opened to open the third air vent 614. At this time, the indoor air can pass through the indoor return air vent 22, the first air duct 41, the fan inlet 31, the fan outlet, the indoor air outlet 28, the first air vent 612, the air passage space 611, and the third air vent 614 in sequence and be blown back into the room to complete the purification.

[0066] It is understandable that as long as the switching valve 40 is in the second position, the exhaust function and the indoor circulation and purification function can be switched by switching valve 60, which is very convenient and quick.

[0067] This application also provides a fresh air conditioner, which includes a fresh air module 10. The specific structure of the fresh air module 10 is as described in the above embodiments. Since this fresh air conditioner adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0068] like Figure 9 As shown, this application also proposes a control method for a fresh air conditioning unit, wherein the fresh air conditioning unit includes the aforementioned fresh air module 10, and the control method includes:

[0069] Step S1: Monitor the on / off status of the fresh air module 10 in real time. The on / off status of the fresh air module 10 generally needs to be manually switched by the user as needed. Of course, in some fresh air conditioners, the fresh air module 10 can also be automatically turned on or off by a timer or based on air quality. Therefore, during monitoring, the on / off signals from the user or the air conditioner itself can be monitored according to the actual situation of the air conditioner.

[0070] Step S2: When the fresh air module 10 is detected to be turned on, the indoor pollutant concentration is acquired and compared with a preset concentration range. Specifically, a sensor for detecting indoor air quality can be installed on the fresh air conditioner. This sensor can be a carbon dioxide sensor, a TVOC (Total Volatile Organic Compounds) sensor, a PM2.5 sensor, a temperature sensor, or other types of sensors, which can be customized according to user needs. For example, if the user is mainly concerned about the indoor carbon dioxide concentration, a carbon dioxide sensor is used. If the user is mainly concerned about the indoor TVOC concentration, a TVOC sensor is used. If the user is mainly concerned about the indoor PM2.5 concentration, a PM2.5 sensor is used. If the user is concerned about the concentration of two or more air pollutants, two or more sensors can be used simultaneously.

[0071] The preset concentration range can be set according to the "Indoor Air Quality Standard" or by the user.

[0072] Step S31: When the pollutant concentration is less than the preset concentration range, control the switching valve 40 to move to the second position, and control the lifting cover 62 to open the third air vent 614; it can be understood that when the pollutant concentration is less than the preset concentration range, it indicates that the air quality is good. At this time, the switching valve 40 can be controlled to move to the second position, and the lifting cover 62 can be controlled to open the third air vent 614, thereby activating the indoor circulation purification function to purify pollutants with lower concentrations in the indoor air. Figure 7 As shown, at this time, the air passes through the indoor return air inlet 22, the first air duct 41, the fan inlet 31, the fan outlet, the indoor air outlet 28, the first air passage 612, the air passage space 611, and the third air passage 614 in sequence and is blown back into the room.

[0073] Step S32: When the pollutant concentration is within the preset concentration range, control the switching valve 40 to move to the second position, and control the lifting cover 62 to close the third air vent 614; it can be understood that when the pollutant concentration is within the preset concentration range, it indicates that the air quality is poor, and the indoor circulation purification method will take a long time, resulting in high energy consumption. Therefore, the switching valve 40 can be controlled to move to the second position, and the lifting cover 62 can be controlled to close the third air vent 614, thereby activating the exhaust function to discharge indoor pollutants to the outside. Figure 8 As shown, at this time, the air passes through the indoor return air inlet 22, the first air duct 41, the fan inlet 31, the fan outlet, the indoor air outlet 28, the first air passage 612, the air passage space 611, the second air passage 613, the exhaust vent 23, the second air duct 42, and the fresh air inlet 21 in sequence and is discharged to the outside.

[0074] Step S33: When the pollutant concentration exceeds the preset concentration range, control the switching valve 40 to switch to the first position and control the lifting cover 62 to open the third air vent 614. It can be understood that when the pollutant concentration exceeds the preset concentration range, it indicates poor air quality. If exhaust ventilation is used, at least all indoor air needs to be exhausted, which consumes a lot of energy and is inefficient. Therefore, the switching valve 40 can be switched to the first position, and the lifting cover 62 can be controlled to open the third air vent 614, thereby activating the fresh air function, introducing fresh outdoor air, diluting the indoor pollutant concentration, and improving air quality. Figure 6 As shown, at this time, the air passes through the fresh air inlet 21, the first air duct 41, the fan inlet 31, the fan outlet, the indoor air outlet 28, the first air passage 612, the air passage space 611, and the third air passage 614 in sequence and is blown into the room.

[0075] It is understood that the control method of the fresh air conditioner in this application selects the indoor circulation purification function, exhaust function or fresh air function according to the indoor air quality. Different functions are selected for different pollutant concentrations, thereby improving purification efficiency while improving air quality.

[0076] In the above embodiments, the descriptions of each embodiment have different focuses. Parts not described in detail in a particular embodiment can be referred to in the relevant descriptions of other embodiments. In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0077] The fresh air module provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A fresh air module, characterized in that, include: A housing, wherein the housing is provided with a fresh air inlet, an indoor return air inlet, and an exhaust vent; a fan is also installed inside the housing, the fan having a fan inlet; and... A switching valve is movably installed inside the housing and has an independent first air duct and a second air duct. The switching valve moves within the housing and has a first position and a second position. Wherein, the airflow direction at the air inlet of the first air duct, the airflow direction at the air inlet of the second air duct, and the airflow direction at the air outlet of the second air duct are in a first plane, and the airflow direction at the air outlet of the first air duct is in a second plane. When the switching valve is in the first position, the first air duct connects the fresh air inlet and the fan inlet; When the switching valve is in the second position, the first air duct connects the indoor return air inlet and the fan inlet, and the second air duct connects the exhaust vent and the fresh air inlet; The housing is provided with an air inlet chamber, and the switching valve is rotatably installed in the air inlet chamber, dividing the air inlet chamber into a first air chamber and a second air chamber; The switching valve includes a partition plate, the partition plate having a first surface, the first surface having a recessed portion that is recessed into the second air cavity, the recessed portion communicating with the second air cavity to form the first air duct; The partition plate also has a second surface, on which a first air guide plate and a second air guide plate are provided at relatively intervals, and a second air duct is formed between the first air guide plate and the second air guide plate; The fan also has a fan outlet, and the housing is also provided with an indoor air outlet that communicates with the fan outlet; The fresh air module also includes a base, which is mounted on the housing and has an air passage space, which has a first air passage, a second air passage and a third air passage. The second air duct has a second air inlet and a second air outlet. The first air inlet is connected to the indoor air outlet, the second air outlet is connected to the exhaust vent, and the third air inlet is used to connect to the indoor environment.

2. The fresh air module as described in claim 1, characterized in that, The fan inlet is connected to the first air chamber, and the fresh air inlet, the indoor return air inlet, and the exhaust vent are located in the second air chamber; The first air duct extends from the first air cavity to the second air cavity, and the second air duct is located inside the second air cavity.

3. The fresh air module as described in claim 1, characterized in that, The recessed portion is located at the edge of the partition plate and is recessed into the second air cavity together with a portion of the edge of the partition plate; and / or, the recessed portion has a recessed surface facing the air inlet of the fan, and the recessed surface is an arc surface.

4. The fresh air module as described in claim 1, characterized in that, The first air guide plate extends along the diameter of the partition plate and passes at least partially through the central axis of the partition plate; The fresh air module also includes a drive motor, which is arranged corresponding to the central axis of the partition plate and connected to the first air guide plate.

5. The fresh air module as described in claim 1, characterized in that, The first air duct has a first air inlet, and in the axial direction of the switching valve, the height of the first air inlet is the same as the height of the first air guide plate and the second air guide plate. The switching valve has a circular projection in its axial direction, and the arc lengths corresponding to the first air inlet, the second air inlet, and the second air outlet are equal.

6. The fresh air module as described in claim 1, characterized in that, The second air guide plate is an arc-shaped plate and bends toward the side where the first air guide plate is located.

7. The fresh air module as described in claim 1, characterized in that, The housing is also provided with a fresh air interface, a return air interface and an exhaust air interface, which are respectively connected to the fresh air inlet, the indoor return air inlet and the exhaust air vent. The fresh air inlet, the return air inlet, and the exhaust air inlet are arranged in a ring, with a 120° interval between each other. The switching valve is rotatably installed between the fresh air inlet, the return air inlet, and the exhaust air inlet.

8. The fresh air module as described in claim 1, characterized in that, The fresh air module also includes a liftable cover, which is movably installed on the third air inlet and is used to open or close the third air inlet.

9. A fresh air conditioning system, characterized in that, Includes the fresh air module as described in any one of claims 1 to 8.

10. A method for controlling a fresh air conditioning unit, wherein the fresh air conditioning unit is the fresh air conditioning unit as described in claim 9, characterized in that, The fresh air module also includes a liftable cover, which is movably installed on the third air inlet and used to open or close the third air inlet. The control method includes: Real-time monitoring of the opening and closing status of the fresh air module; When the fresh air module is detected to be turned on, the indoor pollutant concentration is obtained and compared with a preset concentration range; When the concentration of the pollutant is less than the preset concentration range, the switching valve is controlled to move to the second position, and the lifting cover is controlled to open the third air vent. When the pollutant concentration is within the preset concentration range, the switching valve is controlled to move to the second position, and the lifting cover is controlled to close the third air vent. When the concentration of the pollutant is greater than the preset concentration range, the switching valve is controlled to switch to the first position, and the lifting cover is controlled to open the third air vent.

Images