Fresh air device and air conditioner

Abstract

The application provides a fresh air device and an air conditioner, wherein the fresh air device comprises a shell, a motor support, a motor and a fan wheel, the shell comprises a volute and a cover plate, the cover plate covers an opening of the volute, the motor support is arranged in the shell and connected with the cover plate, the motor is installed on the motor support, and the fan wheel is arranged in the shell and installed on the motor, wherein the volute and the cover plate are foam pieces. According to the technical scheme, the volute and the cover plate of the fresh air device are arranged as foam pieces, so that when the fresh air device is installed in the air conditioner, it is not necessary to separately paste a sponge on the shell of the fresh air device, the fresh air device can be directly installed in the air conditioner, and the assembly efficiency of the air conditioner is improved.

Description

Technical Field

[0001] This invention relates to the field of air treatment, and more particularly to a fresh air device and an air conditioner including the fresh air device. Background Technology

[0002] As users have increasingly higher demands for air conditioning experience, more and more users are inclined to purchase air conditioners with fresh air functions. These air conditioners are equipped with a fresh air device that can be connected to the outside. When the user turns on the fresh air mode, the device operates to bring fresh outdoor air into the room.

[0003] During the production and assembly of this type of air conditioner, sponge needs to be attached to the outer casing of the fresh air unit to reduce the noise generated by vibration during operation.

[0004] However, the process of applying foam will slow down the efficiency of the air conditioning unit. In addition, applying foam to the outer shell of the fresh air unit will also take up space inside the air conditioner. Summary of the Invention

[0005] This invention proposes a fresh air device to solve the problem of excessive noise in existing fresh air devices.

[0006] To address the above problems, the present invention proposes a fresh air device, comprising:

[0007] The outer casing includes a volute and a cover plate, the cover plate covering the opening of the volute 11a;

[0008] A motor bracket is disposed inside the housing and connected to the cover plate;

[0009] The motor is mounted on the motor bracket;

[0010] The impeller is disposed within the housing and mounted on the motor;

[0011] The volute and the cover plate are made of foam.

[0012] The present invention also provides an air conditioner, including a fresh air device, the fresh air device including a housing, the housing including a volute and a cover plate, the cover plate covering the opening of the volute;

[0013] A motor bracket is disposed inside the housing and connected to the cover plate;

[0014] The motor is mounted on the motor bracket;

[0015] The impeller is disposed within the housing and mounted on the motor;

[0016] The volute and the cover plate are made of foam.

[0017] In one embodiment, the motor bracket is provided with a plurality of first support portions, which extend outward from the outer casing.

[0018] In one embodiment, a flexible element is provided at the first support portion.

[0019] In one embodiment, the motor bracket has a rear side facing away from the air outlet, and the first support portions are spaced apart on the rear side.

[0020] In one embodiment, the fresh air device further includes an air outlet assembly, the volute having an air outlet, and the air outlet assembly disposed at the air outlet; the air outlet assembly is adhesively bonded to the volute and / or the cover plate.

[0021] In one embodiment, the fresh air device further includes an air outlet assembly, the volute having an air outlet, and the air outlet assembly being connected to the motor bracket.

[0022] In one embodiment, the air outlet assembly is provided with a second support portion, which is used to connect the front frame or panel of the air conditioner.

[0023] In one embodiment, the air outlet component has a protruding lug on its periphery, and the lug is provided with a screw hole.

[0024] In one embodiment, the first support extends from the side of the cover plate facing away from the wind turbine.

[0025] In one embodiment, the fresh air device further includes an air intake assembly, the volute having an air inlet, the air intake assembly being disposed at the air inlet, and the air intake assembly being adhesively bonded to the volute and / or the cover plate.

[0026] In one embodiment, the motor bracket is bonded to the cover plate.

[0027] In one embodiment, the volute has an air duct for accommodating the impeller, a purification chamber for installing a filter, and an air inlet, the air inlet being connected to the air duct through the purification chamber.

[0028] In one embodiment, the wind turbine is a centrifugal wind turbine.

[0029] The technical solution of the present invention sets the volute and cover plate of the fresh air device as foam parts, so that when the fresh air device is installed in the air conditioner, it is not necessary to attach sponge to the outer shell of the fresh air device separately. The fresh air device can be directly installed in the air conditioner, thereby improving the assembly efficiency of the air conditioner. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of an embodiment of the fresh air device of the present invention (wherein, the fresh air device is shown from different perspectives on the left and right sides respectively);

[0032] Figure 2 for Figure 1 Exploded view of the fresh air unit;

[0033] Figure 3 for Figure 2 A schematic diagram of the assembly structure of the motor bracket and the motor;

[0034] Figure 4 For Figure 1 Side view of the fresh air unit;

[0035] Figure 5 For Figure 4 A cross-sectional view of the fresh air unit along line AA;

[0036] Figure 6 for Figure 1 A bottom view of the fresh air system;

[0037] Figure 7 for Figure 6 Sectional view along line BB.

[0038] Explanation of icon numbers:

[0039]

[0040]

[0041] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0043] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0044] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0045] Please see Figure 1 This invention provides a fresh air device 10 and an air conditioner including the fresh air device 10. The air conditioner can be a wall-mounted air conditioner, a floor-standing air conditioner, a portable air conditioner, a window unit, a ceiling-mounted air conditioner, or a ducted air conditioner. The air conditioner has a casing with a fresh air duct inlet and a fresh air outlet. One end of the fresh air duct passes through the fresh air duct inlet into the casing, and the other end extends outdoors. The fresh air device 10 is connected to both the fresh air duct and the fresh air outlet. When the fresh air device 10 is in operation, it can introduce outdoor fresh air through the fresh air duct and then blow it into the room from the fresh air outlet.

[0046] Taking a wall-mounted air conditioner as an example, it includes a chassis, a heat exchanger, a cross-flow fan, a front frame, and a panel. The heat exchanger is fixed to the chassis, the cross-flow fan is fixed to the chassis, and the cross-flow fan is set in the accommodating space formed by the heat exchanger. The front frame is installed on the chassis and covers the heat exchanger and the cross-flow fan. The panel is installed on the front side of the front frame, and the fresh air unit 10 can be fixed on the chassis.

[0047] Please refer to the following: Figure 2The fresh air device 10 comprises a housing 11, a motor 13 bracket 12, a motor 13, and a fan 14. The housing 11 includes a volute 11a and a cover plate 11b, with the cover plate 11b covering the opening of the volute 11a. The motor bracket 12 is disposed within the housing 11 and connected to the cover plate 11b. The motor 13 is mounted on the motor bracket 12. The fan 14 is disposed within the housing 11 and mounted on the motor 13. The volute 11a and the cover plate 11b are made of foam.

[0048] It should be noted that when the fresh air unit 10 is installed, its main stress point is on the motor bracket 12. For example, the motor bracket 12 is fixed to the air conditioner chassis with screws. Of course, it is also possible that the entire outer shell 11 of the fresh air unit 10 is fixed to the chassis directly or indirectly, or it can be fixed to the air conditioner frame directly or indirectly, or it can be fixed to the heat exchanger (e.g., the heat exchanger side plate) directly or indirectly.

[0049] The volute 11a and the cover plate 11b of the fresh air device 10 are made of foam. The material of this foam can be polystyrene foam, rigid polyurethane foam, or polyethylene or polypropylene plastic foam. For the volute 11a and the cover plate 11b in this application to be made of foam, they first need to have a certain degree of supporting rigidity, and secondly, a certain degree of flexibility.

[0050] For the materials of other structural components of the fresh air unit 10, such as the motor bracket 12, the material can be rigid plastic or metal, which mainly plays a certain supporting role.

[0051] Because the outer casing 11 of the fresh air unit 10 is made of foam, it is not necessary to separately attach foam to the outside of the fresh air unit 10 when installing it on an air conditioner, thus significantly improving assembly efficiency. Furthermore, since no foam is needed, the outer casing 11 of the fresh air unit 10 can be made larger within the same space, allowing for a higher fresh air volume during operation. Moreover, since foam itself has a certain noise-absorbing effect, the noise level of the fresh air unit 10 during operation can also be reduced.

[0052] The technical solution of the present invention sets the volute 11a and cover plate 11b of the fresh air device 10 as foam parts, so that when the fresh air device 10 is installed in the air conditioner, it is not necessary to attach sponge to the outer shell 11 of the fresh air device 10 separately. The fresh air device 10 can be directly installed in the air conditioner, thereby improving the assembly efficiency of the air conditioner.

[0053] Please see Figure 2 , Figure 3 , Figure 4 and Figure 5The motor bracket 12 is located inside the housing and serves as a load-bearing element, supporting the weight of the entire fresh air unit 10. To facilitate the installation and fixation of the fresh air unit 10, in this embodiment, the motor bracket 12 is provided with a plurality of first support portions 114, which extend from the outside of the housing 11.

[0054] The first support part 114 can be a buckle, a stud, a protrusion with a through hole, etc. The fresh air device 10 can be fixed to the chassis or abut against the chassis through the first support part 114.

[0055] Furthermore, considering that the motor 13 is mounted on the motor bracket 12, the vibration generated by the motor 13 during operation will be directly transmitted to the motor bracket 12, and then from the motor bracket 12 to the chassis. To reduce vibration, in another preferred embodiment, a flexible element 17 (such as...) is provided at the first support portion 114. Figure 2 and Figure 3 ).

[0056] The motor bracket 12 is connected to the chassis via a flexible element 17, which significantly reduces the transmission of vibration from the motor bracket 12 itself to the chassis. Here, the flexible element 17 can be a rubber pad, a silicone pad, or other flexible plastic, etc.

[0057] Please continue reading. Figure 2 and Figure 3 With the air outlet 111 of the fresh air device 10 as the front side, the fresh air device 10 can be fixed to the chassis from its rear side, or from its left or right side. Considering that the indoor unit of a wall-mounted air conditioner generally contains a cross-flow fan, which is quite long and occupies most of the length of the air conditioner, fixing the left or right side of the fresh air device 10 to the chassis would further increase the length of the air conditioner, leaving unused space in the front and rear directions. Therefore, in this embodiment, the motor bracket 12 has a rear side 113 facing away from the air outlet 111, and the first support part 114 is spaced apart on the rear side 113.

[0058] Please see Figure 1 and Figure 2 In one embodiment, the fresh air device 10 further includes an air outlet assembly 15, the volute 11a has an air outlet 111, the air outlet assembly 15 is disposed at the air outlet 111, and the air outlet assembly 15 is bonded to the volute 11a and / or the cover plate 11b by adhesive.

[0059] Inside the air conditioner, the fan outlet 111 needs to connect with the fresh air outlet 111 on the air conditioner casing. If the air outlet assembly 15 is not provided, and the foam outer shell 11 is directly connected to the air conditioner casing, the service life of the fresh air device 10 will be significantly reduced. This is because, at the air outlet 111 of the fresh air device 10, the airflow will frequently shift, causing fatigue damage to the foam components around the air outlet 111. Over time, this will directly lead to cracks around the air outlet 111 of the fresh air device 10, and these cracks will extend to the entire outer shell 11. Therefore, the air outlet assembly 15 is added in this embodiment. The air outlet assembly 15 can also be interference-fitted, snap-fitted, or fixed with screws to the volute 11a and / or the cover plate 11b. However, interference fits are prone to causing cracks in the foam components, screw fixing is complicated (time-consuming and labor-intensive) and damages the foam components, and snap-fitting also causes some damage to the foam components. Therefore, it is a preferred method to attach the air outlet assembly 15 to the volute 11a and / or the cover plate 11b by adhesive.

[0060] The air outlet assembly 15 is made of rigid plastic or metal, such as polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polystyrene (PS), or ABS plastic (ABS plastic is modified polystyrene plastic, composed of three components based on acrylonitrile, butadiene, and styrene); other examples include aluminum alloy and stainless steel. Because this rigid plastic has a certain degree of fatigue resistance and vibration resistance, even if the airflow ripples through the air outlet 111, it will not affect the air outlet assembly 15.

[0061] In one embodiment, considering that the outer casing 11 is not a load-bearing component, fixing the air outlet assembly 15 to the outer casing 11 can easily damage the outer casing 11 if the air outlet assembly is subjected to force. Unlike the previous embodiment, in this embodiment, the air outlet assembly 15 is connected to the motor bracket 12, meaning that even if the air outlet assembly 15 is subjected to external force, the force will not be transferred to the outer casing 11, thus protecting the outer casing 11.

[0062] Furthermore, to enhance the overall stability of the fresh air unit 10 during installation, in this embodiment, a second support portion is provided on the air outlet assembly 15. This second support portion is used to connect to the air conditioner's frame or panel. When the fresh air unit 10 is installed inside the air conditioner, its air outlet 111 faces the air conditioner housing (which includes a panel and a frame). Here, the second support portion allows the fresh air unit 10 to be snapped onto, abutted against, or fixed to the frame with screws. The second support portion can also allow the fresh air unit to be snapped onto, abutted against, or fixed to the panel with screws.

[0063] Please see Figure 1 , Figure 5 and Figure 6 The above embodiments discuss the rear side of the fresh air device 10 being fixed to the chassis. Since the fresh air device 10 has a certain size in the front-rear direction, if only the rear side of the fresh air device 10 is fixed to the chassis, the amplitude of the front side of the fresh air device 10 will be amplified when the fresh air device 10 vibrates during operation. Therefore, unlike the previous embodiment (where the second support is located on the air outlet assembly), the air inlet assembly 16 is provided with a lug 115 that protrudes laterally from the cover plate 11b. The lug 115 has a screw hole 116, and the cover plate 11b has a relief groove 119 corresponding to the position of the screw hole 116 (e.g., ...). Figure 1 and Figure 2 ).

[0064] Thus, when fixing the fresh air unit 10 to the chassis, the rear side of the fresh air unit 10 can be fixed to the chassis with screws or other fasteners, or it can be directly fixed to the chassis by screws passing through the gaps on the lugs 115 and through the clearance grooves 119, so that the front side of the fresh air unit 10 can also be well fixed. When the fan is running, its front side will hardly vibrate.

[0065] In the above embodiments, it is discussed that the fresh air device 10 can be fixed to the chassis via its left or right side. In another embodiment, the fresh air device 10 can be fixed to the end cover of the air conditioner via its left or right side. That is, the first support part (114) extends from the side of the cover plate (11b) facing away from the impeller (14). The first support part 114 can abut against, snap into, or be fixedly connected to the end cover by screws.

[0066] It should be noted that, whether it is the first support part 114 or the second support part, when connecting to other components inside the air conditioner, flexible parts 17, such as rubber sleeves, can be provided on the first support part 114 and / or the second support part. In summary, in order to make the overall installation of the fresh air device 10 more stable, the following measures can be taken: ① The first support part 114 can be set on the rear side of the motor bracket 12 (for easy engagement, contact, or screwing with the chassis); ② The first support part 114 can be set on the side of the motor bracket 12 facing away from the impeller (for easy engagement, contact, or screwing with the end cover); ③ The first support part 114 can be set on the upper or lower side of the motor bracket (the upper side is located between the front and rear sides, and the lower side is located between the front and rear side brackets); ④ The second support part is provided on the air outlet assembly 15 (for engagement, contact, or screwing with the face frame, or engagement, contact, or screwing with the panel); ⑤ The lug 115 is provided on the air outlet assembly 15 (for connecting the end cover or the chassis). The above ①, ②, ③, ④, and ⑤ can be combined in any two ways (①② combination, ①③ combination, ①④ combination, ①⑤ combination, ②③ combination, ②④ combination, ②⑤ combination, ③④ combination, ③⑤ combination), any three ways (①④⑤ combination, ①②④ combination, ②③④ combination, etc.), any four ways (①②③④ combination, ①②③⑤ combination, ①②④⑤ combination, ①③④⑤ combination, ②③④⑤ combination), or five ways.

[0067] In another embodiment, the fresh air device 10 further includes an air intake assembly 16, the volute 11a has an air inlet 112, the air intake assembly 16 is disposed at the air inlet 112, and the air intake assembly 16 is adhesively bonded to the volute 11a and / or the cover plate 11b.

[0068] The reason for setting up the air intake assembly 16 is similar to that for setting up the air outlet assembly 15.

[0069] Inside the air conditioner, the air inlet 112 of the fan needs to connect to the fresh air duct. If the air inlet assembly 16 is not installed, and the foam shell 11 is directly connected to the fresh air duct, the service life of the fresh air unit 10 will be significantly reduced. This is because, at the air inlet 112 of the fresh air unit 10, the external airflow is often unstable (due to factors such as temperature, humidity, and wind direction), which can cause fatigue damage to the foam components around the air inlet 112. Over time, this will directly lead to cracks around the air outlet 111 of the fresh air unit 10, and will also affect the seal at the connection between the fresh air duct and the fan. This cracking may even extend to the entire shell 11, causing the fresh air duct to detach from the fresh air unit 10, or the shell 11 to be severely damaged. Therefore, the air inlet assembly 16 is added in this embodiment.

[0070] The air intake assembly 16 can also be interference-fitted with the volute 11a and / or the cover plate 11b, snap-fitted, or fixed with screws. As mentioned above, interference fits can easily cause the foam component to crack, screw fixing is complicated (time-consuming and labor-intensive) and can damage the foam component, and snap-fitting can also cause some damage to the foam component. Therefore, it is a better method to attach the air intake assembly 16 to the volute 11a and / or the cover plate 11b with adhesive.

[0071] The air inlet assembly 16 can be made of rigid plastic or metal, such as aluminum alloy or stainless steel. Other materials include polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polystyrene (PS), and ABS plastic (ABS plastic is a modified polystyrene plastic composed of three components based on acrylonitrile, butadiene, and styrene). Because this rigid plastic has certain fatigue and vibration resistance, even if the fresh air duct vibrates significantly at the air outlet 111, it will not affect the air outlet assembly 15, thus protecting the foam outer shell 11.

[0072] The installation of the fresh air device 10 was mentioned in the above embodiments, and the installation of the fresh air device 10 will be discussed further here.

[0073] There are several ways to install the fresh air unit 10. Here, we will take the method of fixing the fresh air unit 10 to the chassis as an example.

[0074] Please continue reading. Figure 2 and Figure 3 The motor bracket 12 includes a support plate 12a, a motor cover 12b, and connecting ribs 12c. A motor clearance hole 120 is formed in the center of the support plate 12a. The motor cover 12b is correspondingly located at the motor clearance hole 120. The connecting ribs 12c connect the motor cover 12b and the support plate 12a, and are spaced apart circumferentially around the motor clearance hole 120. The motor 13 is positioned at the motor clearance hole 120 and fixed to the motor cover 12b. A first support portion 114 is provided on the support plate 12a. Multiple first support portions 114 are respectively provided on the upper, middle, and lower parts of the rear side of the support plate 12a.

[0075] When the motor 13 is running, the vibration generated by the motor 13 is first directly transmitted to the motor cover 12b. At this time, the motor cover 12b transmits part of the vibration to the cover plate 11b. Since the cover plate 11b is made of foam, it can absorb some of the vibration. On the other hand, the motor cover 12b transmits the vibration to the support plate 12a through the connecting ribs 12c. The multiple connecting ribs 12c are spaced apart. When transmitting vibration, the connecting ribs 12c absorb part of the vibration themselves, and the remaining vibration is transmitted to the support plate 12a. Since the upper, middle and lower parts of the rear side 113 of the support plate 12a are provided with flexible parts 17, the flexible parts 17 can fully absorb the vibration generated by the support plate 12a in the upper, middle and lower dimensions. Finally, the remaining vibration is relatively weak and is transmitted to the chassis, where it is absorbed.

[0076] During the transmission of the aforementioned vibrations, the vibrations of the motor 13 are gradually disintegrated and absorbed through multi-dimensional absorption, ultimately resulting in negligible vibrations transmitted to the chassis.

[0077] Please see Figure 1 , Figure 5 and Figure 6 The above embodiments discuss the rear side of the fresh air device 10 being fixed to the chassis. Since the fresh air device 10 has certain dimensions in the front-to-back direction, if only the rear side of the fresh air device 10 is fixed to the chassis, the amplitude of the front side of the fresh air device 10 will be amplified when it vibrates during operation. Therefore, based on the above embodiments, the air intake assembly 16 is provided with a lug 115 that protrudes laterally from the cover plate 11b. The lug 115 is provided with a screw hole 116, and the cover plate 11b is provided with a relief groove 119 corresponding to the position of the screw hole 116 (e.g., ...). Figure 1 and Figure 2 ).

[0078] Thus, when fixing the fresh air unit 10 to the chassis, the rear side of the fresh air unit 10 can be fixed to the chassis with screws or other fasteners, or it can be directly fixed to the chassis by screws passing through the gaps on the lugs 115 and through the clearance grooves 119, so that the front side of the fresh air unit 10 can also be well fixed. When the fan is running, its front side will hardly vibrate.

[0079] There are several ways to install the motor bracket 12 and the cover plate 11b. For example, they can be fixed by clips (the cover plate 11b is fixed to the motor bracket 12); they can also be glued; they can also be fixed by screws; or the cover plate 11b can be directly fitted onto the motor bracket 12, and the two can be tightly fitted by interference fit.

[0080] Considering the issue of vibration transmission, if the motor bracket 12 and the cover plate 11b are connected too tightly, the vibration of the motor bracket 12 will quickly cause fatigue damage to the cover plate 11b. In a preferred embodiment, in order to make the connection between the two simpler and to improve the service life of the fresh air device 10, the motor bracket 12 is bonded to the cover plate 11b.

[0081] Please see Figure 2 and Figure 7 Although the main function of the fresh air device 10 is to introduce outdoor fresh air into the room, due to the complex outdoor environment, the outdoor fresh air may contain impurities such as leaf fragments, dust, hair, insects, lint, and smoke when it enters the fresh air device 10. These substances may pollute the indoor air. In view of this, in this embodiment, the volute 11a has an air duct 110 for accommodating the impeller 14, a purification chamber 117 for installing the filter 18, and an air inlet 112. The air inlet 112 is connected to the air duct 110 through the purification chamber 117.

[0082] When users have high requirements for air quality, filter 18 can be installed inside the fresh air unit 10. Filter 18 can be a pre-filter, HEPA filter, etc. Filter 18 can be directly installed inside the purification chamber 117. However, considering the disassembly and replacement of filter 18, a filter holder 19 can be added. First, place filter 18 in filter holder 19, and then insert filter holder 19 into purification chamber 117. In addition, filter 18 can be selectively replaced according to the user's own needs.

[0083] In the above embodiments, the impeller 14 inside the fresh air device 10 can be a cross-flow impeller 14, an axial flow impeller 14, a diagonal flow impeller 14, or a centrifugal impeller 14. If a cross-flow impeller 14 is selected, the air delivery distance of the cross-flow impeller 14 is relatively small. In addition, the diameter of the fresh air duct is generally small. Therefore, the air delivery volume and air delivery distance of the fresh air device 10 using a cross-flow impeller 14 are not very good.

[0084] If an axial flow impeller 14 is selected, the noise of the axial flow impeller 14 will be relatively large. In addition, the diameter of the fresh air duct is generally small and far from being able to match the diameter of the axial flow impeller 14. Therefore, the noise of the fresh air device 10 using the axial flow impeller 14 will be relatively large, and the fresh air duct will be difficult to meet its suction rate, which will also affect the air supply volume.

[0085] If the oblique flow fan 14 is chosen, it is a good choice in terms of air volume and air delivery distance. However, considering the unique structural design of the oblique flow fan 14 and the small diameter of the fresh air duct, it cannot match the diameter of the oblique flow fan 14. Therefore, if the fresh air device 10 with the oblique flow fan 14 is used, its noise will be relatively high, and it will also occupy a large space inside the wall-mounted air conditioner.

[0086] If a centrifugal impeller 14 is used, considering the air delivery distance, its effect is second only to the diagonal flow impeller 14 compared to other impellers 14; in terms of noise, it is not as good as the cross-flow impeller 14, but it is significantly better than the axial flow impeller 14 and the diagonal flow impeller 14; in terms of the diameter of the fresh air supply duct, due to the strong suction force of the centrifugal impeller 14, although the diameter of the fresh air duct is small, it will hardly have a significant impact on the air intake of the centrifugal impeller 14.

[0087] Finally, considering that this fresh air device 10 is mainly installed on wall-mounted air conditioners, given the structural characteristics of wall-mounted air conditioners (compared to floor-standing air conditioners, wall-mounted air conditioners have a larger horizontal length and a smaller front-to-back thickness), the fresh air device 10 using centrifugal fan 14 can save the length of the wall-mounted air conditioner and can also utilize the front-to-back dimensions of the wall-mounted air conditioner.

[0088] Considering all the above factors, in this embodiment, centrifugal impeller 14 is the best choice.

[0089] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A fresh air device, installed in an air conditioner, characterized in that, include: The outer casing includes a volute and a cover plate, the cover plate closing onto the opening of the volute; A motor bracket is disposed inside the housing and connected to the cover plate; The motor is mounted on the motor bracket; The impeller is disposed within the housing and mounted on the motor; The volute and the cover plate are made of foam. The fresh air device also includes an air outlet assembly, the volute has an air outlet, and the air outlet assembly is disposed at the air outlet; the material of the air outlet assembly is rigid plastic or metal; When the fresh air device is installed in an air conditioner, it is not necessary to attach sponge separately to the outer casing of the fresh air device. The motor bracket is provided with a plurality of first support parts, which extend outward from the outer casing. The motor bracket bears the weight of the entire fresh air device. The fresh air device is fixed to the air conditioner chassis or abuts against the air conditioner chassis through the first support parts.

2. The fresh air device as described in claim 1, characterized in that, A flexible component is provided at the first support part.

3. The fresh air device as described in claim 1, characterized in that, The motor bracket has a rear side facing away from the air outlet, and the first support portion is arranged at intervals on the rear side.

4. The fresh air device as described in claim 3, characterized in that, The air outlet assembly is glued to the volute and / or the cover plate by adhesive.

5. The fresh air device as described in any one of claims 1-3, characterized in that, The air outlet assembly is connected to the motor bracket.

6. The fresh air device as described in claim 5, characterized in that, The air outlet assembly is provided with a second support part, which is used to connect the front frame or panel of the air conditioner.

7. The fresh air device as described in claim 5, characterized in that, The air outlet component has protruding lugs around its periphery, and the lugs are provided with screw holes.

8. The fresh air device as described in claim 1, characterized in that, The first support extends from the side of the cover plate facing away from the wind turbine.

9. The fresh air device as described in claim 1, characterized in that, The fresh air device further includes an air intake component. The volute has an air inlet, and the air intake component is disposed at the air inlet. The air intake component is glued to the volute and / or the cover plate by adhesive.

10. The fresh air device as described in claim 1, characterized in that, The motor bracket is bonded to the cover plate.

11. The fresh air device as described in claim 1, characterized in that, The volute has an air duct for accommodating the impeller, a purification chamber for installing the filter screen, and an air inlet. The air inlet is connected to the air duct through the purification chamber.

12. The fresh air device as described in claim 1, characterized in that, The wind turbine is a centrifugal wind turbine.

13. An air conditioner, characterized in that, Includes the fresh air device as described in any one of claims 1 to 12.

Images