Fresh air module, fresh air air conditioner and control method

Abstract

This invention provides a fresh air module, a fresh air conditioner, and a control method. The fresh air module includes a volute, a volute cover, a first baffle, a sealing shell, and a second baffle. The volute cover is disposed on one side of the volute and forms a fan blade cavity with the volute. A fresh air outlet and a return air outlet are formed on one radial side of the volute. The first baffle is movably disposed between the fresh air outlet and the return air outlet. The sealing shell is disposed on the other side of the volute and connected to the volute, and forms a fresh air inlet and a return air inlet. The second baffle is movably disposed between the fresh air inlet and the return air inlet. When the fresh air module needs to introduce outdoor fresh air, both the fresh air inlet and the fresh air outlet are opened, allowing outdoor fresh air to enter the room through the fresh air inlet, the fan blade cavity, and the fresh air outlet. When the fresh air module needs to exhaust indoor return air, both the return air inlet and the return air outlet are opened, allowing indoor return air to be exhausted to the outside through the return air inlet, the fan blade cavity, and the return air outlet.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, and particularly relates to a fresh air module, a fresh air air conditioner, and a control method. Background Technology

[0002] As people pay more attention to a healthy home environment, more and more air conditioners are adding health functions, and fresh air is one of the most important ones. The fresh air function in air conditioners is mainly divided into one-way air outlet and two-way air outlet. According to the structural layout of the air conditioner, the fresh air module with two-way air outlet includes two fan blades, a volute housing the two fan blades, and two motors that drive the two fan blades respectively. This makes the structure of the fresh air module complex and occupies a lot of space, resulting in an increase in the size of the air conditioner and a higher structural cost. Summary of the Invention

[0003] In view of this, the present invention provides a fresh air module, a fresh air conditioner and a control method to solve the problems of complex structure, large space occupation and high cost of fresh air modules with bidirectional air outlet in the prior art.

[0004] This invention provides a fresh air module, comprising:

[0005] The volute and the volute cover are provided on one axial side of the volute and the volute cover and the volute cooperate to form a fan blade cavity; a fresh air outlet and a return air outlet are formed on one radial side of the volute.

[0006] A first baffle is movably disposed between the fresh air outlet and the return air outlet; the first baffle can open the fresh air outlet and close the return air outlet at the same time, and the first baffle can close the fresh air outlet and open the return air outlet at the same time.

[0007] A sealing shell is disposed on the other side of the axial direction of the volute and is connected to the volute; the sealing shell forms a fresh air inlet and a return air inlet;

[0008] The second baffle is movably disposed between the fresh air inlet and the return air inlet; the second baffle can open the fresh air inlet and close the return air inlet at the same time, and the second baffle can close the fresh air inlet and open the return air inlet at the same time.

[0009] The fresh air outlet, return air outlet, fresh air inlet, and return air inlet are all connected to the fan blade cavity, and the fresh air outlet and return air inlet are both connected to the indoor environment, while the fresh air inlet and return air outlet are both connected to the outdoor environment.

[0010] Further optionally, the fresh air outlet is formed at the end of the volute away from the sealing shell, and the return air outlet is formed at the end of the volute closer to the sealing shell; the fresh air outlet and the return air outlet are located on the same radial side of the volute.

[0011] The sealing shell has a fresh air inlet and a return air inlet at the end away from the volute; the fresh air inlet is located close to the axis of the volute, and the return air inlet is located away from the axis of the volute.

[0012] Further optionally, the volute includes a cylindrical body and a plate, with the fresh air outlet formed on the side wall of the cylindrical body; the plate surrounds one axial side of the cylindrical body and has the return air outlet formed on the plate.

[0013] Optionally, the fresh air module further includes an exhaust shell, which is disposed at the return air outlet and the exhaust shell and the sealing shell are located on the same side of the volute; an exhaust shell inlet is formed at the end of the exhaust shell near the return air outlet, and the exhaust shell inlet is connected to the return air outlet; an exhaust shell outlet is formed at the end of the exhaust shell away from the return air outlet, and the exhaust shell outlet is connected to the outside; the exhaust shell is configured to form an exhaust duct, and the exhaust duct connects the exhaust shell inlet and the exhaust shell outlet.

[0014] Further optionally, the sealing shell has a clearance groove formed on the side away from the return air inlet; the exhaust shell is disposed in the clearance groove, such that the exhaust shell outlet and the return air inlet are disposed opposite to each other on both sides of the fresh air inlet.

[0015] Optionally, the fresh air module further includes an end cap, which covers the sealing shell and the exhaust shell and has a first end cap opening, a second end cap opening, and a third end cap opening. The first end cap opening is positioned corresponding to the position of the fresh air inlet and is connected to the outside and the fresh air inlet. The second end cap opening is positioned corresponding to the position of the return air inlet and is connected to the inside and the return air inlet. The third end cap opening is positioned corresponding to the position of the exhaust shell outlet and is connected to the outside and the exhaust shell outlet.

[0016] Further optionally, the first baffle is rotatably disposed between the fresh air outlet and the return air outlet, and the first baffle has a first working position that opens the fresh air outlet and closes the return air outlet and a second working position that closes the fresh air outlet and opens the return air outlet.

[0017] The second baffle is rotatably disposed between the fresh air inlet and the return air inlet. The second baffle has a third working position that opens the fresh air inlet and closes the return air inlet, and a fourth working position that closes the fresh air inlet and opens the return air inlet.

[0018] When the first baffle is in the first working position and the second baffle is in the third working position, the fresh air module can introduce outdoor fresh air; when the first baffle is in the second working position and the second baffle is in the fourth working position, the fresh air module can exhaust indoor return air.

[0019] Further optionally, the rotation axis of the first baffle is perpendicular to the axis of the volute, and the rotation plane of the first baffle is parallel to the axis of the volute; the rotation axis of the second baffle is parallel to the axis of the volute, and the second baffle is perpendicular to the axis of the volute; satisfying: 0° < α < 120°, 0° < β < 70°.

[0020] Where α is the rotation angle of the first baffle and β is the rotation angle of the second baffle.

[0021] The present invention also provides a fresh air air conditioner, including the fresh air module described in any of the above claims; the fresh air air conditioner is provided with a fresh air intake mode and a return air exhaust mode;

[0022] The fresh air outlet is opened and the return air outlet is closed, the fresh air inlet is opened and the return air inlet is closed, and the fresh air air conditioner can be in the fresh air intake mode.

[0023] The fresh air outlet is closed and the return air outlet is opened, the fresh air inlet is closed and the return air inlet is opened, and the fresh air air conditioner can be in the exhaust and return air mode.

[0024] The present invention also provides a control method for the above-mentioned fresh air air conditioner, comprising:

[0025] Obtain the current indoor air quality and determine the current quality level;

[0026] When the current air quality level is Level 1, the fresh air conditioner is set to the fresh air intake mode;

[0027] When the current quality level is level two, the fresh air conditioner is set to the exhaust and return air mode;

[0028] The air quality at the first level is higher than that at the second level.

[0029] Compared with the prior art, the main advantages of the present invention are as follows:

[0030] The volute and volute cover form a fan blade cavity. A fresh air outlet and a return air outlet are formed on one radial side of the volute, while a sealing shell forms a fresh air inlet and a return air inlet. When both the fresh air inlet and outlet are open, and both the return air inlet and outlet are closed, outdoor fresh air can enter the fan blade cavity through the fresh air inlet and then be exhausted indoors through the fresh air outlet. When the fresh air inlet and outlet are closed, and the return air inlet and outlet are open, indoor return air can enter the fan blade cavity through the return air inlet and then be exhausted outdoors through the return air outlet. The fresh air module has only one... A single air duct can introduce fresh outdoor air or exhaust indoor return air, with a simple structure that reduces the size and manufacturing cost of the fresh air module. This solves the problems of complex structure, large space occupation, and high cost of existing fresh air modules with bidirectional air outlets. Both outdoor fresh air and indoor return air can enter the fan blade cavity through the same axial side of the volute and then be discharged through the same radial side of the volute, thus effectively drawing in and expelling air, improving the air volume and the air outlet effect of the fresh air module, and solving the problem of high wind resistance and low air volume caused by unreasonable placement of the fresh air inlet and return air inlet. Attached Figure Description

[0031] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0032] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0033] Figure 1 This is a schematic diagram of the assembly structure of a fresh air module embodiment provided by the present invention;

[0034] Figure 2 This is an exploded structural diagram of an embodiment of the fresh air module provided by the present invention;

[0035] Figure 3a and Figure 3b This is a cross-sectional view of an embodiment of the fresh air module (one section) provided by the present invention;

[0036] Figure 4a and Figure 4b This is a cross-sectional view of an embodiment of the fresh air module (another section) provided by the present invention;

[0037] Figure 5a and Figure 5b A schematic diagram of the assembly structure of the volute and exhaust casing provided by the present invention;

[0038] Figure 6a and Figure 6b A schematic diagram of an embodiment of the volute and exhaust casing provided by the present invention when the first baffle is in the first working position;

[0039] Figure 7a and Figure 7b A schematic diagram of an embodiment of the volute and exhaust casing provided by the present invention when the first baffle is in the second working position;

[0040] Figure 8 This is a schematic diagram of the end cap embodiment provided by the present invention;

[0041] Figure 9a A schematic diagram of an embodiment of the end cap provided by the present invention when the second baffle is in the third working position;

[0042] Figure 9b A schematic diagram of an embodiment of the end cap provided by the present invention when the second baffle is in the fourth working position;

[0043] Figure 10a A schematic diagram of the flow path of the fresh air module provided by the present invention when introducing outdoor fresh air;

[0044] Figure 10b A schematic diagram of the flow path of the fresh air module provided by the present invention when exhausting indoor return air;

[0045] In the picture:

[0046] 1-Volume cover;

[0047] 2-Volume; 21-Cylinder; 211-Fresh air outlet; 22-Plate; 221-Return air outlet;

[0048] 3-Sealed housing; 31-Fresh air inlet; 32-Return air inlet; 33-Avoidance groove;

[0049] 4-Exhaust duct casing; 41-Exhaust duct casing inlet; 42-Exhaust duct casing outlet; 43-Exhaust duct;

[0050] 5-End cap; 51-First end cap opening; 52-Second end cap opening; 53-Third end cap opening;

[0051] 61-First baffle; 62-Second baffle; 63-First drive motor; 64-Second drive motor;

[0052] 71-Fan blade; 72-Fan blade motor; 73-Motor bracket; 74-Filter assembly. Detailed Implementation

[0053] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in the embodiments of this invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. “Multiple” generally includes at least two, but does not exclude the inclusion of at least one.

[0055] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0056] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0057] In existing technologies, fresh air modules with bidirectional air outlet function include two fan blades, a volute housing the two fan blades, and two motors that drive the two fan blades respectively. This makes the structure of the fresh air module complex and occupies a large space, which leads to an increase in the size of the air conditioner and a higher structural cost.

[0058] This invention creatively provides a fresh air module, including a volute, a volute cover, and a sealing shell. The volute cover and the sealing shell are respectively disposed on opposite axial sides of the volute, forming a fan blade cavity between the volute and the volute cover. A fresh air outlet and a return air outlet are formed on one radial side of the volute, and a fresh air inlet and a return air inlet are formed on the sealing shell. When the fresh air inlet and outlet are opened, and the return air inlet and outlet are closed, outdoor fresh air can enter the fan blade cavity through the fresh air inlet and then be discharged indoors through the fresh air outlet. When the fresh air inlet and outlet are closed, and the return air inlet and outlet are opened, indoor return air can enter the fan blade cavity through the return air inlet and then be discharged outdoors through the return air outlet. The fresh air module can introduce outdoor fresh air or exhaust indoor return air with only a single air duct, which is simple in structure, reduces the size and manufacturing cost of the fresh air module, and solves the problems of complex structure, large space occupation, and high cost of existing fresh air modules with bidirectional air outlets.

[0059] <Fresh Air Module>

[0060] like Figures 1 to 4b As shown, this embodiment provides a fresh air module, including:

[0061] The volute 2 and the volute cover 1 are provided on the axial side of the volute 2 and the volute cover 1 and the volute 2 cooperate to form a fan blade cavity; a fresh air outlet 211 and a return air outlet 221 are formed on the radial side of the volute 2.

[0062] The first baffle 61 is movably disposed between the fresh air outlet 211 and the return air outlet 221; the first baffle 61 can open the fresh air outlet 211 and close the return air outlet 221 at the same time, and the first baffle 61 can close the fresh air outlet 211 and open the return air outlet 221 at the same time.

[0063] A sealing shell 3 is disposed on the other side of the axial direction of the volute 2 and is connected to the volute 2; the sealing shell 3 forms a fresh air inlet 31 and a return air inlet 32.

[0064] The second baffle 62 is movably disposed between the fresh air inlet 31 and the return air inlet 32; the second baffle 62 can open the fresh air inlet 31 and close the return air inlet 32 ​​at the same time, and the second baffle 62 can close the fresh air inlet 31 and open the return air inlet 32 ​​at the same time.

[0065] Among them, the fresh air outlet 211, the return air outlet 221, the fresh air inlet 31, and the return air inlet 32 ​​are all connected to the fan blade cavity, and the fresh air outlet 211 and the return air inlet 32 ​​are both connected to the indoor environment, while the fresh air inlet 31 and the return air outlet 221 are both connected to the outdoor environment.

[0066] like Figure 10aAs shown, when the fresh air module needs to introduce outdoor fresh air, both the fresh air inlet 31 and the fresh air outlet 211 are opened, and both the return air inlet 32 ​​and the return air outlet 221 are closed. The flow path of the outdoor fresh air is: outdoor → fresh air inlet 31 → fan blade cavity → fresh air outlet 211 → indoor.

[0067] like Figure 10b As shown, when the fresh air module needs to exhaust indoor return air, both the fresh air inlet 31 and the fresh air outlet 211 are closed, while both the return air inlet 32 ​​and the return air outlet 221 are opened. The flow path of the indoor return air is: indoor → return air inlet 32 ​​→ fan blade cavity → return air outlet 221 → outdoor.

[0068] Specifically, the fresh air module also includes a fan blade 71, a motor bracket 73, and a fan blade motor 72; the fan blade 71 is rotatably mounted inside the fan blade cavity, preferably a centrifugal fan blade 71; the motor bracket 73 is mounted on the volute cover 1, the fan blade motor 72 is mounted on the motor bracket 73, and the output shaft of the fan blade motor 72 is drivenly connected to the fan blade 71; controlling the rotation of the fan blade motor 72 can realize the introduction of outdoor fresh air and the exhaust of indoor return air.

[0069] To address the problem that unreasonable positioning of the fresh air inlet 31, return air inlet 32, fresh air outlet 211, and return air outlet 221 leads to high resistance and low flow rate when introducing fresh air or exhausting return air, this embodiment proposes that the fresh air outlet 211 is formed at the end of the volute 2 away from the sealing shell 3, and the return air outlet 221 is formed at the end of the volute 2 closer to the sealing shell 3; the fresh air outlet 211 and the return air outlet 221 are located on the same radial side of the volute 2.

[0070] The sealing shell 3 has a fresh air inlet 31 and a return air inlet 32 ​​at the end away from the volute 2; the fresh air inlet 31 is set close to the axis of the volute 2, and the return air inlet 32 ​​is set away from the axis of the volute 2; preferably, the fresh air inlet 31 is set on the same axis as the volute 2, and the diameter of the fresh air inlet 31 is larger than the diameter of the return air inlet 32.

[0071] In this way, bidirectional airflow can be achieved through a single air duct. The structure is simple and occupies little space. Both outdoor fresh air and indoor return air can enter the fan blade cavity through the same axial side of the volute 2 and then be discharged through the same radial side of the volute 2. This effectively improves airflow and the airflow effect of the fresh air module, and solves the problem of high wind resistance and low airflow caused by unreasonable placement of the fresh air inlet 31, return air inlet 32, fresh air outlet 211, and return air outlet 221.

[0072] Furthermore, the volute 2 includes a cylindrical body 21 and a plate 22. The cylindrical body 21 is located near the volute cover 1, and a fan blade cavity is formed between the cylindrical body 21 and the volute cover 1. A fresh air outlet 211 is formed on the side wall of the cylindrical body 21, so that the fresh air outlet 211 faces the room radially along the volute 2. The plate 22 surrounds one side of the axial direction of the cylindrical body 21 and is close to the sealing shell 3. A return air outlet 221 is formed on the plate 22, and the return air outlet 221 faces the outside along the axial direction of the volute 2. The fresh air outlet 211 and the return air outlet 221 are located on the same radial side of the cylindrical body 21. The fresh air outlet 211 and the return air outlet 221 are both located on the rotation path of the first baffle 61, so that rotating the first baffle 61 can open one of the outlets while closing the other outlet.

[0073] like Figure 5a and Figure 5b As shown, to address the complex structure required when the return air outlet 221 is connected to the outside, this embodiment proposes that the fresh air module also includes an exhaust shell 4. The exhaust shell 4 is located at the return air outlet 221, and the exhaust shell 4 and the sealing shell 3 are located on the same side of the volute 2. An exhaust shell inlet 41 is formed at the end of the exhaust shell 4 near the return air outlet 221, and the exhaust shell inlet 41 faces the return air outlet 221 and is connected to the return air outlet 221. An exhaust shell is formed at the end of the exhaust shell 4 away from the return air outlet 221. The outlet 42 is connected to the outside; the exhaust shell 4 is surrounded to form an exhaust duct 43, which connects the exhaust shell inlet 41 and the exhaust shell outlet 42; thus, when the fresh air module needs to exhaust indoor return air, the fresh air inlet 31 and the fresh air outlet 211 are both closed, and the return air inlet 32 ​​and the return air outlet 221 are both opened. The flow path of the indoor return air is: indoor → return air inlet 32 ​​→ fan blade cavity → return air outlet 221 → exhaust shell inlet 41 → exhaust duct 43 → exhaust shell outlet 42 → outside;

[0074] Specifically, the exhaust duct 43 has an L-shaped structure and includes a first exhaust section and a second exhaust section arranged sequentially and connected to each other. The extension direction of the first exhaust section is parallel to the axis of the volute 2, and the extension direction of the second exhaust section is perpendicular to the axis of the volute 2. The exhaust shell inlet 41 is far away from the axis of the volute 2 and close to the axis of the volute 2.

[0075] Furthermore, the sealing shell 3 has a relief groove 33 formed on the side away from the return air inlet 32, and the relief groove 33 extends along the axial direction of the volute 2; the exhaust shell 4 is disposed in the relief groove 33, so that the exhaust shell outlet 42 and the return air inlet 32 ​​are disposed opposite to each other on both sides of the fresh air inlet 31.

[0076] Specifically, the sealing shell 3 protrudes away from the volute 2, forming an air inlet cavity between the sealing shell 3 and the volute 2. The air inlet cavity connects the fresh air inlet 31 with the fan blade cavity and the return air inlet 32 ​​with the fan blade cavity. That is, outdoor fresh air enters the fan blade cavity through the fresh air inlet 31 and the air inlet cavity, and indoor return air enters the fan blade cavity through the return air inlet 32 ​​and the air inlet cavity. A first mounting port is formed on the side of the sealing shell 3 near the return air inlet 32. The first mounting port and the clearance groove 33 are located on opposite sides of the sealing shell 3, and the first mounting port is connected to the air inlet cavity. The fresh air module also includes a filter assembly 74, which includes a filter and a filter support. The filter is set on the filter support, and the filter support is set at the first mounting port so that the filter is located in the air inlet cavity. The filter can filter the air flowing through the air inlet cavity.

[0077] like Figure 8 , Figure 9a and Figure 9b As shown, to address the issue of poor aesthetics in the fresh air module when the sealing shell 3 and exhaust shell 4 are mounted on the volute 2, this embodiment proposes that the fresh air module further include an end cap 5. The end cap 5 covers the sealing shell 3 and exhaust shell 4 and has a first end cap opening 51, a second end cap opening 52, and a third end cap opening 53. The position of the first end cap opening 51 corresponds to the position of the fresh air inlet 31 and the first end cap opening 51 connects the outdoor environment with the fresh air inlet 31. Outdoor fresh air can enter through the first end cap and the fresh air inlet. The air inlet 31 and the air inlet cavity enter the fan blade cavity; the position of the second end cover 52 corresponds to the position of the return air inlet 32 ​​and the second end cover 52 connects the indoor air and the return air inlet 32; the indoor return air can enter the fan blade cavity through the second end cover, the return air inlet 32 ​​and the air inlet cavity; the position of the third end cover 53 corresponds to the position of the exhaust shell outlet 42 and the third end cover 53 connects the outdoor air and the exhaust shell outlet 42; the return air in the exhaust duct 43 can be discharged to the outdoor air through the exhaust shell outlet 42 and the third end cover 53.

[0078] Furthermore, such as Figure 6a and Figure 6b As shown, the first baffle 61 is rotatably disposed between the fresh air outlet 211 and the return air outlet 221. Specifically, both the fresh air outlet 211 and the return air outlet 221 are elongated structures, and the first baffle 61 is also an elongated structure. The first baffle 61 is rotatably disposed on the volute 2, and the axis of rotation of the first baffle 61 is perpendicular to the axis of the volute 2. The fresh air module also includes a first drive motor 63, which is disposed on the volute 2 and its output shaft is drivenly connected to the first baffle 61. The first drive motor 63 can drive the first baffle 61 to rotate. The first baffle 61 has a first working position that opens the fresh air outlet 211 and closes the return air outlet 221, and a second working position that closes the fresh air outlet 211 and opens the return air outlet 221.

[0079] like Figure 7a and Figure 7b As shown, the second baffle 62 is rotatably disposed between the fresh air inlet 31 and the return air inlet 32. Specifically, both the fresh air inlet 31 and the return air inlet 32 ​​are circular structures. The second baffle 62 is rotatably disposed between the fresh air inlet 31 and the return air inlet 32, and the axis of rotation of the second baffle 62 is parallel to the axis of the volute 2. The fresh air module also includes a second drive motor 64, which is disposed on the end cover 5 and the output shaft of the second drive motor 64 is drivenly connected to the second baffle 62. The second drive motor 64 can drive the second baffle 62 to rotate. The second baffle 62 has a third working position that opens the fresh air inlet 31 and closes the return air inlet 32, and a fourth working position that closes the fresh air inlet 31 and opens the return air inlet 32.

[0080] When the first baffle 61 is in the first working position and the second baffle 62 is in the third working position, the fresh air module can introduce outdoor fresh air; when the first baffle 61 is in the second working position and the second baffle 62 is in the fourth working position, the fresh air module can exhaust indoor return air.

[0081] Furthermore, the rotation axis of the first baffle 61 is perpendicular to the axis of the volute 2, and the rotation plane of the first baffle 61 is parallel to the axis of the volute 2; the rotation axis of the second baffle 62 is parallel to the axis of the volute 2, and the second baffle 62 is perpendicular to the axis of the volute 2; satisfying: 0°<α<120°, 0°<β<70°.

[0082] Where α is the rotation angle of the first baffle 61 and β is the rotation angle of the second baffle 62.

[0083] The fresh air module also includes a fresh air intake duct and a return air exhaust duct. The fresh air intake duct connects the first end cover 51 to the outside and is installed on the wall through a through-wall hole. The return air exhaust duct connects the third end cover 53 to the outside and is installed on the wall through another through-wall hole.

[0084] In other embodiments, the fresh air module includes a three-way pipe, which comprises a first pipe section, a second pipe section, and a third pipe section. The first pipe section connects the first end cap 51 to the second pipe section, and the third pipe section connects the third end cap 53 to the second pipe section. The second pipe section is installed on the wall through a through-wall hole, and the other end of the second pipe section is connected to the outside. A valve is installed at the connection point of the three pipe sections. By controlling the valve, the first pipe section can be connected to the second pipe section, or the third pipe section can be connected to the second pipe section, thereby allowing outdoor fresh air to be introduced or indoor return air to be exhausted. In this way, the number of through-wall holes can be reduced, simplifying the installation process of the fresh air module.

[0085] <Fresh Air Conditioner>

[0086] This embodiment also provides a fresh air conditioner, including the fresh air module described in any of the above claims; the fresh air conditioner is provided with a fresh air intake mode and a return air exhaust mode;

[0087] By opening the fresh air outlet 211 and closing the return air outlet 221, and opening the fresh air inlet 31 and closing the return air inlet 32, the fresh air air conditioner can be in the fresh air intake mode. Outdoor fresh air can enter the fan blade cavity through the fresh air inlet 31 and then be discharged into the room through the fresh air outlet 211.

[0088] When the fresh air outlet 211 is closed and the return air outlet 221 is opened, and the fresh air inlet 31 is closed and the return air inlet 32 ​​is opened, the fresh air air conditioner can be in exhaust and return air mode. Indoor return air can enter the fan blade cavity through the return air inlet 32 ​​and then be exhausted to the outside through the return air outlet 221.

[0089] <Control Methods>

[0090] This embodiment also provides a control method for the above-mentioned fresh air conditioning system, including:

[0091] Obtain the current indoor air quality and determine the current quality level;

[0092] When the current air quality level is Level 1, the fresh air conditioning unit is set to fresh air intake mode.

[0093] When the current air quality level is Level 2, the fresh air conditioner is set to exhaust and return air mode to rapidly improve the indoor air quality.

[0094] The air quality at the first level is higher than that at the second level.

[0095] Furthermore, the control methods also include:

[0096] When the fresh air conditioner is in exhaust and return air mode, continue to determine the current air quality level;

[0097] When the current air quality level is Level 1, switch the fresh air conditioning to fresh air intake mode;

[0098] In addition, the fresh air module stops operating when the fresh air conditioner receives a user's command to turn off the introduction of fresh air.

[0099] Example 2

[0100] Unlike Embodiment 1, the volute 2 has a volute air outlet, and an air outlet frame is detachably provided at the volute air outlet. The air outlet frame has a fresh air outlet 211 and a return air outlet 221 arranged opposite to each other. The fresh air outlet 211 faces the room radially along the volute 2, and the return air outlet 221 faces the outside along the axial direction of the volute 2. The first baffle 61 is rotatably provided on the air outlet frame. Rotating the first baffle 61 can open one of the air outlets and close the other air outlet at the same time.

[0101] Example 3

[0102] Unlike Embodiment 1, the sealing shell 3 has a second mounting port on the side near the return air outlet 221, which is connected to the air inlet cavity. The fresh air module also includes a mounting bracket, a filter, and a duct. The mounting bracket is located at the second mounting port, and the filter is located on the mounting bracket and inside the air inlet cavity, so that the filter can filter the air flowing through the air inlet cavity. The duct is located on the mounting bracket, and one end of the duct is connected to the return air outlet 221, and the other end of the duct is connected to the third end cap 53. When the fresh air module needs to exhaust indoor return air, both the fresh air inlet 31 and the fresh air outlet 211 are closed, and both the return air inlet 32 ​​and the return air outlet 221 are opened. The flow path of the indoor return air is: indoor → return air inlet 32 ​​→ fan blade cavity → return air outlet 221 → duct → third end cap 53 → outdoors.

[0103] Exemplary embodiments of this disclosure have been specifically shown and described above. It should be understood that this disclosure is not limited to the detailed structures, arrangements, or implementations described herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A fresh air module, characterized in that, The fresh air module includes: The volute and the volute cover are provided on one axial side of the volute and the volute cover and the volute cooperate to form a fan blade cavity; a fresh air outlet and a return air outlet are formed on one radial side of the volute. A first baffle is movably disposed between the fresh air outlet and the return air outlet; the first baffle can open the fresh air outlet and close the return air outlet at the same time, and the first baffle can close the fresh air outlet and open the return air outlet at the same time. A sealing shell is disposed on the other side of the axial direction of the volute and is connected to the volute; the sealing shell forms a fresh air inlet and a return air inlet; The second baffle is movably disposed between the fresh air inlet and the return air inlet; the second baffle can open the fresh air inlet and close the return air inlet at the same time, and the second baffle can close the fresh air inlet and open the return air inlet at the same time. The volute includes a cylindrical body and a plate. The fresh air outlet is formed on the side wall of the cylindrical body and is located at the end away from the sealing shell. The plate surrounds one axial side of the cylindrical body and forms the return air outlet, which is located at the end close to the sealing shell. The fresh air outlet and the return air outlet are located on the same radial side of the volute. The sealing shell has a fresh air inlet and a return air inlet at the end away from the volute; the fresh air inlet is located close to the axis of the volute, and the return air inlet is located away from the axis of the volute. The fresh air outlet, return air outlet, fresh air inlet, and return air inlet are all connected to the fan blade cavity, and the fresh air outlet and return air inlet are both connected to the indoor environment, while the fresh air inlet and return air outlet are both connected to the outdoor environment.

2. The fresh air module according to claim 1, characterized in that, The fresh air module also includes an exhaust shell, which is located at the return air outlet and on the same side of the volute as the sealing shell; an exhaust shell inlet is formed at the end of the exhaust shell near the return air outlet, and the exhaust shell inlet is connected to the return air outlet; an exhaust shell outlet is formed at the end of the exhaust shell away from the return air outlet, and the exhaust shell outlet is connected to the outside; the exhaust shell is configured to form an exhaust duct, and the exhaust duct connects the exhaust shell inlet and the exhaust shell outlet.

3. The fresh air module according to claim 2, characterized in that, The sealing shell has a clearance groove on the side away from the return air inlet; the exhaust shell is disposed in the clearance groove, so that the exhaust shell outlet and the return air inlet are disposed opposite to each other on both sides of the fresh air inlet.

4. The fresh air module according to claim 3, characterized in that, The fresh air module also includes an end cap, which is disposed on the sealing shell and the exhaust shell and has a first end cap opening, a second end cap opening and a third end cap opening; the position of the first end cap opening corresponds to the position of the fresh air inlet and the first end cap opening connects the outside and the fresh air inlet; the position of the second end cap opening corresponds to the position of the return air inlet and the second end cap opening connects the inside and the return air inlet. The position of the third end cap corresponds to the position of the exhaust shell outlet, and the third end cap connects the outside and the exhaust shell outlet.

5. The fresh air module according to claim 1, characterized in that, The first baffle is rotatably disposed between the fresh air outlet and the return air outlet. The first baffle has a first working position that opens the fresh air outlet and closes the return air outlet, and a second working position that closes the fresh air outlet and opens the return air outlet. The second baffle is rotatably disposed between the fresh air inlet and the return air inlet. The second baffle has a third working position that opens the fresh air inlet and closes the return air inlet, and a fourth working position that closes the fresh air inlet and opens the return air inlet. When the first baffle is in the first working position and the second baffle is in the third working position, the fresh air module can introduce outdoor fresh air; When the first baffle is in the second working position and the second baffle is in the fourth working position, the fresh air module can exhaust indoor return air.

6. The fresh air module according to claim 5, characterized in that, The rotation axis of the first baffle is perpendicular to the axis of the volute, and the rotation plane of the first baffle is parallel to the axis of the volute; the rotation axis of the second baffle is parallel to the axis of the volute, and the second baffle is perpendicular to the axis of the volute. Satisfy the following conditions: 0° < α < 120°, 0° < β < 70°; Where α is the rotation angle of the first baffle and β is the rotation angle of the second baffle.

7. A fresh air conditioning system, characterized in that, Includes the fresh air module as described in any one of claims 1-6; the fresh air air conditioner is provided with a fresh air intake mode and a return air exhaust mode; The fresh air outlet is opened and the return air outlet is closed, the fresh air inlet is opened and the return air inlet is closed, and the fresh air air conditioner can be in the fresh air intake mode. The fresh air outlet is closed and the return air outlet is opened, the fresh air inlet is closed and the return air inlet is opened, and the fresh air air conditioner can be in the exhaust and return air mode.

8. A control method for a fresh air conditioning system as described in claim 7, characterized in that, The control method includes: Obtain the current indoor air quality and determine the current quality level; When the current air quality level is Level 1, the fresh air conditioner is set to the fresh air intake mode; When the current air quality level is level two, the fresh air conditioner is set to the exhaust and return air mode; The air quality at the first level is higher than that at the second level.

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