Fan assembly, fresh air module and air conditioning equipment

Abstract

The utility model provides a fan assembly, a fresh air module and air conditioning equipment. The fan assembly comprises an impeller and two volutes, the two volutes are oppositely arranged and define an air duct with an air outlet, and the impeller is arranged in the air duct; an air mixing shell is arranged on the side, away from the other volute, of each volute, an air mixing cavity is formed in each air mixing shell, a first air inlet, a second air inlet and an air mixing outlet are formed in each air mixing shell, the first air inlets and the second air inlets communicate with the air mixing cavities, and the air mixing outlets communicate with the air mixing cavities and the air channel. According to the air supply device, two kinds of air flows with different temperatures can enter the air mixing cavity from the first air inlet and the second air inlet of the air mixing cavity respectively, are mixed for the first time in the air mixing cavity, and then enter the impeller in the air duct for secondary mixing, so that the two kinds of air flows can be fully mixed, and the uniformity of the air supply temperature is improved.

Description

Technical Field

[0001] This application belongs to the field of air conditioning technology, and in particular relates to a fan assembly, a fresh air module and an air conditioning device. Background Technology

[0002] Air conditioning equipment refers to devices or systems that regulate parameters such as air temperature, humidity, cleanliness, and airflow rate through artificial means. Many air conditioning devices are equipped with fresh air modules, which use centrifugal fans to mix outdoor fresh air with indoor return air to improve air quality.

[0003] To increase airflow, existing fresh air modules typically employ dual-inlet centrifugal fans. Indoor return air can enter the centrifugal fan from both sides to mix with outdoor fresh air. However, existing dual-inlet centrifugal fans have the following drawbacks: the outdoor fresh air and indoor return air are not fully mixed after entering the centrifugal fan, resulting in uneven supply air temperature and affecting user comfort. Utility Model Content

[0004] This application provides a fan assembly, a fresh air module, and an air conditioning device to solve the problem of insufficient airflow mixing in existing dual-inlet centrifugal fans.

[0005] In a first aspect, embodiments of this application provide a fan assembly, the fan assembly including an impeller and two volutes, the two volutes being arranged opposite to each other and forming a duct with an air outlet, the impeller being disposed within the duct; each volute having a mixing shell on the side opposite to the other volute, the mixing shell having a mixing chamber formed therein, the mixing shell having a first air inlet, a second air inlet and a mixing outlet, the first air inlet and the second air inlet both communicating with the mixing chamber, the mixing outlet communicating with the mixing chamber and the duct.

[0006] Optionally, the second air inlet is located on the side of the mixing housing opposite to the volute.

[0007] Optionally, the mixing chamber includes a constant chamber and a gradual chamber arranged sequentially along the axial direction of the volute, wherein the constant chamber is closer to the volute than the gradual chamber, and the gradual chamber gradually expands along the axial direction of the volute toward the constant chamber.

[0008] Optionally, the mixing shell is provided with an air inlet grille at the second air inlet.

[0009] Optionally, the air inlet grille includes a central plate, an annular plate, a plurality of first connecting strips, and a plurality of second connecting strips. The central plate is located in the middle of the second air inlet, and the annular plate is arranged around the outer periphery of the central plate. The inner side of the annular plate is connected to the side of the central plate by a plurality of first connecting strips, and the outer side of the annular plate is connected to the inner wall of the second air inlet by a plurality of second connecting strips.

[0010] Optionally, the center plate is a circular plate, the annular plate is a circular annular plate, and a plurality of first connecting strips are evenly arranged along the circumference of the circular plate, and a plurality of second connecting strips are evenly arranged along the circumference of the circular annular plate.

[0011] Optionally, the mixing housing includes a plurality of mixing chambers, which are arranged sequentially and connected sequentially along the axial direction of the volute. The first air inlet and the second air inlet are both connected to the outermost mixing chamber, and the mixing outlet is connected to the innermost mixing chamber; and / or, a damper is provided at the second air inlet, which is used to adjust the opening and closing size of the second air inlet.

[0012] Optionally, the first air inlet is located at one end of the mixing housing along the radial direction of the volute, and the first air inlets on both mixing housings face the same side of the fan assembly.

[0013] Secondly, this application embodiment also provides a fresh air module, the fresh air module including an air inlet box and the above-mentioned fan assembly, the air inlet box forming a fresh air cavity, the air inlet box being provided with a fresh air inlet and a fresh air outlet communicating with the fresh air cavity, and the fresh air outlet being communicated with the first air inlets of the two mixing shells.

[0014] Thirdly, embodiments of this application also provide an air conditioning device, which includes the aforementioned fresh air module.

[0015] The fan assembly provided in this application embodiment has a mixing shell on each of the two volutes facing away from each other. A mixing chamber is formed inside the mixing shell. The mixing shell is provided with a first air inlet, a second air inlet, and a mixing outlet. The first air inlet and the second air inlet are both connected to the mixing chamber. The mixing outlet connects the mixing chamber to the air duct. Thus, two airflows with different temperatures can enter the mixing chamber from the first air inlet and the second air inlet, respectively. After initial mixing in the mixing chamber, they enter the impeller in the air duct for secondary mixing. This allows the two airflows to be fully mixed, thereby improving the uniformity of the air supply temperature.

[0016] The fresh air module provided in this application embodiment uses the fan assembly provided in this application embodiment, so that outdoor fresh air and indoor return air can enter the mixing chamber from the first air inlet and the second air inlet of the mixing chamber respectively. After the initial mixing in the mixing chamber, the air enters the impeller in the air duct for secondary mixing, thereby making the outdoor fresh air and indoor return air fully mixed, thereby improving the uniformity of the supply air temperature and improving user comfort.

[0017] The air conditioning equipment provided in this application embodiment, by adopting the fresh air module provided in this application embodiment, can fully mix outdoor fresh air and indoor return air, thereby improving the uniformity of the supply air temperature and improving user comfort. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this application. Those skilled in the art can obtain other drawings based on these drawings without creative effort. In the following description, the same reference numerals denote the same parts.

[0019] Figure 1 This is a schematic diagram of the structure of the fan assembly provided in an embodiment of this application.

[0020] Figure 2 for Figure 1 A schematic diagram of the wind turbine assembly from another perspective.

[0021] Figure 3 for Figure 1 The front view of the wind turbine assembly shown.

[0022] Figure 4 for Figure 3 The diagram shows a cross-sectional view of the wind turbine assembly along the AA direction.

[0023] Figure 5 for Figure 4 Left view of the fan assembly shown.

[0024] Figure 6 for Figure 4 The right view of the wind turbine assembly shown.

[0025] Figure 7 for Figure 1 The diagram shows the first exploded structure of the wind turbine assembly.

[0026] Figure 8 for Figure 1 The diagram shows a second exploded view of the wind turbine assembly.

[0027] Figure 9This is a schematic diagram of the structure of the mixing shell provided in an embodiment of this application.

[0028] Figure 10 for Figure 9 The front view of the mixing shell is shown.

[0029] Figure 11 for Figure 9 The diagram shows a structural schematic of the mixing shell from another perspective.

[0030] Figure 12 This is a schematic diagram of the structure of the fresh air module provided in an embodiment of this application.

[0031] Figure 13 for Figure 12 The diagram shows a structural schematic of the fresh air module from another perspective.

[0032] Figure 14 for Figure 13 The main view of the fresh air module shown.

[0033] Figure 15 for Figure 13 The left view of the fresh air module shown.

[0034] Figure 16 for Figure 13 The right view of the fresh air module shown.

[0035] Figure 17 for Figure 12 The diagram shows the first exploded structure of the fresh air module.

[0036] Figure 18 for Figure 12 The diagram shows the second exploded structure of the fresh air module.

[0037] Figure 19 This is a schematic diagram of the air inlet box provided in an embodiment of this application.

[0038] Explanation of icon numbers:

[0039] 100. Fan assembly; 110. Impeller; 120. Volute; 121. Air duct; 122. Air outlet; 130. Mixing shell; 131. Mixing chamber; 1311. Constant chamber; 1312. Gradient chamber; 132. First air inlet; 133. Second air inlet; 134. Mixing outlet; 140. Air inlet grille; 141. Center plate; 142. Annular plate; 143. First connecting strip; 144. Second connecting strip; 150. Motor mounting plate; 200. Air inlet box; 201. Fresh air chamber; 202. Fresh air inlet; 203. Fresh air outlet; 204. Mounting port. Detailed Implementation

[0040] 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.

[0041] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, 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. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The term "and / or" includes any and all combinations of one or more of the associated listed items.

[0043] This application provides a wind turbine assembly 100, such as... Figures 1-11 As shown, the fan assembly 100 includes an impeller 110 and two volutes 120. The two volutes 120 are arranged opposite each other and enclose an air duct 121 with an air outlet 122. The impeller 110 is disposed in the air duct 121. Each volute 120 has a mixing shell 130 on the side away from the other volute 120. A mixing chamber 131 is formed inside the mixing shell 130. The mixing shell 130 is provided with a first air inlet 132, a second air inlet 133 and a mixing outlet 134. The first air inlet 132 and the second air inlet 133 are both connected to the mixing chamber 131. The mixing outlet 134 connects the mixing chamber 131 and the air duct 121.

[0044] The fan assembly 100 provided in this application embodiment has a mixing shell 130 provided on each of the two volutes 120 opposite to each other. A mixing chamber 131 is formed inside the mixing shell 130. The mixing shell 130 is provided with a first air inlet 132, a second air inlet 133 and a mixing outlet 134. The first air inlet 132 and the second air inlet 133 are both connected to the mixing chamber 131. The mixing outlet 134 connects the mixing chamber 131 and the air duct 121. Thus, two airflows with different temperatures can enter the mixing chamber 131 from the first air inlet 132 and the second air inlet 133 respectively. After initial mixing in the mixing chamber 131, they enter the impeller 110 in the air duct 121 for secondary mixing. In this way, the two airflows can be fully mixed, thereby improving the uniformity of the air supply temperature.

[0045] It is understandable that the air intake area of ​​a single-sided centrifugal fan is limited, thus restricting the air volume. Compared to a single-sided centrifugal fan, the fan assembly 100 of this application adopts a dual-sided air intake method, which can simultaneously draw airflow from the second air inlet 133 of the mixing shell 130 on both volutes 120, increasing the air intake area and thus significantly improving the air volume. The overall air volume is increased by about 15% to 25% compared to a single-sided centrifugal fan, enhancing the indoor air circulation efficiency and accelerating the uniform distribution of indoor temperature.

[0046] In some embodiments of this application, the fan assembly 100 further includes a motor mounted on one of the volutes 120. The motor shaft is connected to the impeller 110 and can drive the impeller 110 to rotate. When the impeller 110 rotates, it can drive two airflows of different temperatures to enter the mixing chamber 131 from the first air inlet 132 and the second air inlet 133 of the mixing shell 130 for initial mixing, and then enter the impeller 110 in the air duct 121 for secondary mixing. The mixed airflow in the air duct 121 can be delivered to the air outlet 122 and blown out from the air outlet 122.

[0047] For ease of understanding, the volute 120 used for mounting the motor is defined as the first volute, and the other volute 120 is defined as the second volute. Because the motor mounting structure on the first volute (e.g., the motor mounting plate 150) results in insufficient airflow velocity, leading to low intake efficiency. This application addresses this by providing a mixing chamber 130 on the side of the first volute away from the second volute. This allows the airflow on this side of the first volute to first pass through the mixing chamber of the mixing chamber 130, creating a pressure change and generating a booster airflow, thereby improving the intake efficiency of the first volute.

[0048] Optionally, the impeller 110 includes a hub and multiple blades arranged circumferentially along the hub, with streamlined guide vanes on the side of the hub facing the second volute. By setting the streamlined guide vanes, the airflow is further optimized when entering the impeller 110, reducing airflow turbulence, lowering noise, and improving air delivery stability.

[0049] In some embodiments of this application, the second air inlet 133 is disposed on the side of the mixing housing 130 opposite to the volute 120. This arrangement ensures that the second air inlets 133 on both sides do not interfere with each other's air intake volume during air intake, thereby guaranteeing air intake efficiency.

[0050] Furthermore, the mixing chamber 131 includes a constant chamber 1311 and a gradual change chamber 1312. The constant chamber 1311 and the gradual change chamber 1312 are arranged sequentially along the axial direction of the volute 120, with the constant chamber 1311 being closer to the volute 120 than the gradual change chamber 1312. That is, the gradual change chamber 1312 and the constant chamber 1311 are arranged sequentially along the axial direction of the volute 120 towards the direction closer to the volute 120; wherein, the gradual change chamber 1312 gradually expands along the axial direction of the volute 120 towards the direction closer to the constant chamber 1311. Specifically, along the axial direction of the volute 120, the inner diameter of the constant chamber 1311 remains essentially constant, while the inner diameter of the gradual change chamber 1312 gradually increases towards the direction closer to the constant chamber 1311.

[0051] This application, by setting the inner diameter of the gradient cavity 1312 to gradually increase towards the constant cavity 1311, can uniformly diffuse the airflow entering from the second air inlet 133, thereby reducing turbulence and improving airflow stability; moreover, it can change the inlet air velocity, effectively reducing eddy current losses and improving the intake efficiency of the impeller 110 according to Bernoulli's principle. Experimental tests have shown that by setting the mixing cavity 131 to include the gradient cavity 1312 with the above-described structure, the total air volume of the impeller 110 at the same rotational speed can be increased by 5% to 10%, thus improving the air delivery capacity of the fan assembly 100.

[0052] Optionally, the inner wall of the gradient cavity 1312 can be designed with a streamlined structure. This reduces flow resistance, increases airflow velocity, and allows the impeller 110 to transport air more efficiently, improving the overall efficiency of the fan assembly 100, reducing energy consumption, and thus increasing the overall energy efficiency ratio of the fan assembly 100. It also makes the airflow transition smoother and reduces eddy noise. Experimental tests show that, under the same airflow conditions, the fan assembly 100 provided in this embodiment reduces noise by approximately 3-5 dB(A) compared to traditional fans, improving the user experience. Furthermore, under the same airflow conditions, the fan assembly 100 provided in this embodiment reduces power consumption by 5%-10%, contributing to lower overall energy consumption and aligning with the trend of energy conservation and environmental protection.

[0053] In some embodiments of this application, the mixing housing 130 is provided with an air inlet grille 140 at the second air inlet 133. By providing an air inlet grille 140 at the second air inlet 133, foreign objects such as dust and insects can be intercepted from entering the fan assembly 100, preventing the impeller 110 from being damaged due to blockage or wear by foreign objects.

[0054] Optional, such as Figure 10 As shown, the air inlet grille 140 includes a central plate 141, an annular plate 142, a plurality of first connecting strips 143 and a plurality of second connecting strips 144. The central plate 141 is located in the middle of the second air inlet 133, and the annular plate 142 is arranged around the outer periphery of the central plate 141. The inner side of the annular plate 142 is connected to the side of the central plate 141 by a plurality of first connecting strips 143, and the outer side of the annular plate 142 is connected to the inner wall of the second air inlet 133 by a plurality of second connecting strips 144.

[0055] Optionally, the center plate 141 is a circular plate, the annular plate 142 is a circular annular plate, and multiple first connecting strips 143 are evenly arranged along the circumference of the circular plate, and multiple second connecting strips 144 are evenly arranged along the circumference of the circular annular plate. This arrangement can reduce air intake resistance, increase air volume, and make air intake more uniform.

[0056] In some embodiments of this application, the mixing housing 130 includes multiple mixing chambers 131, which are sequentially arranged and connected along the axial direction of the volute 120. The first air inlet 132 and the second air inlet 133 are both connected to the outermost mixing chamber 131, and the mixing outlet 134 is connected to the innermost mixing chamber 131. This arrangement allows the airflow to pass through multiple mixing stages before entering the impeller 110, improving the mixing uniformity of the two airflows, effectively reducing temperature stratification, and thus improving the air delivery quality.

[0057] In some embodiments of this application, a damper is provided at the second air inlet 133. The damper is used to adjust the opening and closing size of the second air inlet 133, that is, to adjust the air intake area of ​​the second air inlet 133. By providing the above-mentioned damper at the second air inlet 133, the damper can control the opening and closing size of the second air inlet 133 through mechanical or electronic adjustment, so that the air intake volume is variable, thereby dynamically optimizing the performance of the fan assembly 100, improving the adaptability of the fan assembly 100, and providing a more intelligent air supply solution.

[0058] Optionally, the first air inlet 132 is located at one end of the mixing chamber 130 along the radial direction of the volute 120, and the first air inlets 132 on both mixing chambers 130 face the same side of the fan assembly 100. This arrangement facilitates the centralized arrangement of fresh air introduction components (such as the air inlet box 200 and the fresh air duct) on the same side of the fan assembly 100, so that the mixing chambers 131 on both sides share a single fresh air introduction component. This reduces the number of parts, helps to lower costs, and makes the overall structure more compact.

[0059] In some embodiments of this application, the mixing chambers 131 of the two mixing shells 130 are symmetrically arranged, that is, the mixing chambers 131 of the mixing shells 130 on the two volutes 120 are symmetrically arranged, so that the hot and cold air in the mixing chambers 131 on both sides are mixed in the same proportion.

[0060] Of course, in other embodiments, the mixing chambers 131 of the two mixing shells 130 can also be arranged asymmetrically, that is, the mixing chambers 131 of the two mixing shells 130 on the two volutes 120 are not symmetrically arranged. In this case, the mixing chambers 131 of the two mixing shells 130 have different sizes, so that the hot and cold air in the mixing chambers 131 on both sides are mixed in different proportions. It is understood that in some special application scenarios (such as winter heating or summer cooling), different mixing ratios may be required. By designing the two mixing shells 130 to be asymmetrically arranged, the mixing ratio can be adjusted, thereby optimizing the supply air temperature control in different seasons and improving comfort and energy saving.

[0061] In some embodiments of this application, guide vanes are provided inside the air inlet of the mixing shell 130 and the mixing chamber 131 to form a multi-layered airflow guiding design, thereby reducing airflow turbulence and enhancing airflow stability. Optionally, the guide vanes can be adjustable guide vanes, which are driven by a motor to change the airflow direction, thereby achieving intelligent mixing of hot and cold air and improving the mixing effect.

[0062] The operation process of the wind turbine assembly 100 provided in this embodiment is as follows:

[0063] Two airflows with different temperatures enter the mixing chamber 131 from the first air inlet 132 and the second air inlet 133 respectively for initial mixing. The airflow after initial mixing enters the air duct 121 from the mixing chamber 131 and undergoes secondary mixing in the impeller 110 in the air duct 121. The high-speed rotating impeller 110 gives the airflow after secondary mixing higher kinetic energy, forming a centrifugal pressurization effect. The airflow after being pressurized by the impeller 110 is evenly discharged through the air outlet 122 of the air duct 121, forming a large volume of airflow.

[0064] This application also provides a fresh air module, such as... Figures 12-19As shown, the fresh air module includes an air inlet box 200 and a fan assembly 100. The specific structure of the fan assembly 100 is as described in the above embodiment. A fresh air cavity 201 is formed inside the air inlet box 200. The air inlet box 200 is provided with a fresh air inlet 202 and a fresh air outlet 203. Both the fresh air inlet 202 and the fresh air outlet 203 are connected to the fresh air cavity 201, and the fresh air outlet 203 is connected to the first air inlet 132 of both mixing shells 130.

[0065] The fresh air inlet 202 of the air inlet box 200 is used to supply outdoor fresh air into the fresh air cavity 201, and the fresh air outlet 203 of the air inlet box 200 is used to supply outdoor fresh air in the fresh air cavity 201 to the first air inlet 132 of the mixing shell 130; the first air inlet 132 of the mixing shell 130 is used to supply outdoor fresh air discharged from the fresh air outlet 203 into the mixing shell 131, and the second air inlet 133 of the mixing shell 130 is used to supply indoor return air into the mixing shell 131.

[0066] The fresh air module provided in this application embodiment uses the fan assembly 100 provided in this application embodiment, so that outdoor fresh air flows sequentially through the fresh air inlet 202, the fresh air cavity 201 and the fresh air outlet 203, and then enters the mixing cavity 131 from the first air inlet 132. At the same time, indoor return air enters the mixing cavity 131 from the second air inlet 133. After the outdoor fresh air and indoor return air are initially mixed in the mixing cavity 131, they enter the impeller 110 in the air duct 121 for secondary mixing, so that the outdoor fresh air and indoor return air are fully mixed, thereby improving the uniformity of the supply air temperature, reducing temperature stratification, and improving user comfort.

[0067] Specifically, when the impeller 110 rotates, it drives the indoor return air to enter the mixing chamber 131 from the second air inlet 133 of the mixing shell 130. At the same time, it drives the outdoor fresh air to flow sequentially through the fresh air inlet 202, the fresh air chamber 201, the fresh air outlet 203, and the first air inlet 132 of the mixing shell 130 into the mixing chamber 131. This allows the outdoor fresh air and the indoor return air to first enter the mixing chamber 131 for initial mixing, and then enter the impeller 110 in the air duct 121 for secondary mixing. When the impeller 110 rotates, it can also deliver the mixed air in the air duct 121 to the air outlet 122 and blow it out from the air outlet 122.

[0068] In some embodiments of this application, the fresh air module further includes a fresh air duct (not shown). One end of the fresh air duct is connected to the fresh air inlet 202 of the air inlet box 200, and the other end extends to the outdoor side. The fresh air duct is used to connect the outdoor space and the fresh air chamber 201, allowing fresh air flow from the outdoor space to enter the mixing shell 130 through the fresh air chamber 201 and the second air inlet 133. During the installation of the fresh air duct, it can be installed through the wall of the indoor space to connect the outdoor space and the fresh air chamber 201.

[0069] In some embodiments of this application, the fresh air module further includes a filter screen installed within the fresh air chamber 201, located between the fresh air inlet 202 and the fresh air outlet 203. By installing the filter screen within the fresh air chamber 201, the fresh air can be filtered, improving its quality. Furthermore, the filter screen can simultaneously filter the fresh air entering the two mixing chambers 131, improving the filtration efficiency. Optionally, the filter screen can be a HEAP mesh, activated carbon filter, or electro-purification filter, etc., without further limitation.

[0070] Optionally, the air inlet box 200 has an installation port 204, and the air inlet box 200 has an installation position. The filter screen is inserted into the air inlet box 200 through the installation port 204 and slides into the installation position. By sliding the filter screen into the installation position, the user can slide to remove and install the filter screen, which is convenient for maintenance, cleaning, or replacement of the filter screen. By providing an installation port 204 on the air inlet box 200, the user can remove and install the filter screen without disassembling the air inlet box 200, which can improve the efficiency of filter screen removal and installation.

[0071] This application also provides an air conditioning device, which includes a fresh air module. The specific structure of the fresh air module is as described in the above embodiments. Since this air conditioning device 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, and will not be described in detail here.

[0072] Optionally, air conditioning equipment can be air conditioners (such as floor-standing air conditioners or wall-mounted air conditioners), fresh air systems, or air purifiers.

[0073] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0074] The fan assembly, fresh air module, and air conditioning equipment provided in the embodiments of this application have 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 fan assembly, characterized in that, The fan assembly (100) includes an impeller (110) and two volutes (120). The two volutes (120) are arranged opposite each other and enclose a duct (121) with an air outlet (122). The impeller (110) is disposed in the duct (121). Each volute (120) has a mixing shell (130) on the side away from the other volute (120). A mixing chamber (131) is formed in the mixing shell (130). The mixing shell (130) is provided with a first air inlet (132), a second air inlet (133) and a mixing outlet (134). The first air inlet (132) and the second air inlet (133) are both connected to the mixing chamber (131). The mixing outlet (134) connects the mixing chamber (131) and the duct (121).

2. The wind turbine assembly according to claim 1, characterized in that, The second air inlet (133) is located on the side of the mixing shell (130) away from the volute (120).

3. The wind turbine assembly according to claim 2, characterized in that, The mixing chamber (131) includes a constant chamber (1311) and a gradual chamber (1312) arranged sequentially along the axial direction of the volute (120), and the constant chamber (1311) is closer to the volute (120) than the gradual chamber (1312), and the gradual chamber (1312) gradually expands along the axial direction of the volute (120) towards the constant chamber (1311).

4. The wind turbine assembly according to any one of claims 1 to 3, characterized in that, The mixing shell (130) is provided with an air inlet grille (140) at the second air inlet (133).

5. The wind turbine assembly according to claim 4, characterized in that, The air inlet grille (140) includes a center plate (141), an annular plate (142), a plurality of first connecting strips (143) and a plurality of second connecting strips (144). The center plate (141) is located in the middle of the second air inlet (133), and the annular plate (142) is arranged around the outer periphery of the center plate (141). The inner side of the annular plate (142) is connected to the side of the center plate (141) by a plurality of first connecting strips (143), and the outer side of the annular plate (142) is connected to the inner wall of the second air inlet (133) by a plurality of second connecting strips (144).

6. The wind turbine assembly according to claim 5, characterized in that, The center plate (141) is a circular plate, the annular plate (142) is a circular annular plate, a plurality of first connecting strips (143) are evenly arranged along the circumference of the circular plate, and a plurality of second connecting strips (144) are evenly arranged along the circumference of the circular annular plate.

7. The wind turbine assembly according to claim 1, characterized in that, The mixing housing (130) includes a plurality of mixing chambers (131), which are arranged sequentially and connected sequentially along the axial direction of the volute (120). The first air inlet (132) and the second air inlet (133) are both connected to the outermost mixing chamber (131), and the mixing outlet (134) is connected to the innermost mixing chamber (131). And / or, a damper is provided at the second air inlet (133), the damper being used to adjust the opening and closing size of the second air inlet (133).

8. The wind turbine assembly according to claim 1, characterized in that, The first air inlet (132) is located at one end of the mixing housing (130) along the radial direction of the volute (120), and the first air inlets (132) on the two mixing housings (130) face the same side of the fan assembly (100).

9. A fresh air module, characterized in that, The assembly includes an air inlet box (200) and a fan assembly (100) as described in any one of claims 1 to 8. A fresh air cavity (201) is formed inside the air inlet box (200). The air inlet box (200) is provided with a fresh air inlet (202) and a fresh air outlet (203) communicating with the fresh air cavity (201). The fresh air outlet (203) is connected to the first air inlets (132) of the two mixing shells (130).

10. An air conditioning device, characterized in that, The air conditioning device includes the fresh air module as described in claim 9.

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