Fresh air device, air conditioner indoor unit and air conditioner

Abstract

The utility model provides a fresh air device, an air conditioner indoor unit and an air conditioner, the fresh air device comprises a centrifugal fan, an air guide channel and an axial flow fan, a first channel opening of the air guide channel is communicated with an air outlet of the centrifugal fan, and a second channel opening of the air guide channel is communicated with the air inlet end of the axial flow fan; and ventilation holes are formed in the peripheral wall of the air guide channel. By applying the fresh air device, static pressure can be overcome, and the fresh air volume can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, specifically, to a fresh air device, an indoor air conditioner applying the fresh air device, and an air conditioner applying the indoor air conditioner. Background Art

[0002] With the continuous improvement of people's living standards, the comfort requirements for air conditioners are also getting higher and higher. In the field of fresh air air conditioners, the fresh air module is often limited by size and unable to provide a large air volume, which restricts the fresh air supply performance of the fresh air air conditioner and affects the user experience of customers.

[0003] In an existing air conditioner fresh air module, a structure of two centrifugal fans connected in series is adopted. This fresh air module can use two fans to provide the power required for the fresh air to flow along the way, enhance the ability of the fresh air module to overcome static pressure, improve the total pressure and fresh air volume of the fresh air module, and facilitate the provision of more fresh air in actual applications, improving the user experience of the product. However, this solution cannot overcome the characteristics of the centrifugal fan itself, which has a small air volume but a large wind pressure, resulting in a poor body feeling when the fresh air blows directly at the customer.

[0004] Therefore, a more optimized fresh air module structure needs to be considered. Summary of the Utility Model

[0005] The first object of the utility model is to provide a fresh air device that can overcome static pressure and increase the fresh air volume.

[0006] The second object of the utility model is to provide an indoor air conditioner that can overcome static pressure and increase the fresh air volume.

[0007] The third object of the utility model is to provide an air conditioner that can overcome static pressure and increase the fresh air volume.

[0008] To achieve the above first object, the fresh air device provided by the utility model includes a centrifugal fan, a wind guiding channel, and an axial flow fan. The first channel opening of the wind guiding channel is communicated with the air outlet of the centrifugal fan, and the second channel opening of the wind guiding channel is communicated with the air inlet end of the axial flow fan; ventilation holes are arranged on the peripheral wall of the wind guiding channel.

[0009] As can be seen from the above solution, the fresh air device of the utility model connects the centrifugal fan and the axial flow fan in series, and ventilation holes are arranged on the peripheral wall of the wind guiding channel, so that the fresh air device has both the ability to overcome static pressure and can increase the fresh air volume. At the same time, the fresh air device can mix indoor air and fresh air, making the temperature of the air blown out from the fresh air component of the air conditioner closer to the room temperature than the fresh air temperature. Therefore, compared with the way of connecting centrifugal fans in series, users have a better body feeling.

[0010] In a further solution, a resonance silencing cavity is arranged in the wind guiding channel, and the ventilation holes are communicated with the resonance silencing cavity.

[0011] It can be seen that, since the centrifugal fan is connected in series with the axial flow fan, it may cause problems such as resonance and excessive duct noise. Therefore, by setting a resonance silencing cavity structure in the air guiding channel, resonance of the fresh air device can be prevented, the noise of the fresh air device can be reduced, and the user experience can be improved.

[0012] In a further solution, a sound-absorbing perforated plate is provided in the resonance silencing cavity, and the ventilation holes are located on the peripheral wall between the sound-absorbing perforated plate and the second channel opening.

[0013] It can be seen that, since a sound-absorbing perforated plate is provided in the resonance silencing cavity, when sound waves are on the surface of the sound-absorbing perforated plate, the sound wave interference will cause the gas to resonate in the resonance cavity. The resonance process can convert sound energy into heat energy, which is finally dissipated, thus playing a role in silencing.

[0014] In a further solution, a first filter screen is provided at the air inlet of the centrifugal fan.

[0015] It can be seen that by providing a first filter screen at the air inlet of the centrifugal fan, the dust from the outside fresh air can be reduced, and the service life of the centrifugal fan can be increased.

[0016] In a further solution, a first filter screen support is installed at the air inlet of the centrifugal fan, and the first filter screen is detachably installed on the first filter screen support.

[0017] It can be seen that by providing a first filter screen support at the air inlet of the centrifugal fan and detachably installing the first filter screen on the first filter screen support, the disassembly and assembly of the first filter screen can be facilitated.

[0018] In a further solution, a second filter screen is provided at the air inlet end of the axial flow fan.

[0019] It can be seen that by providing a second filter screen at the air inlet end of the axial flow fan, the dust from the room can be reduced, the service life of the axial flow fan can be increased, and the cleanliness of the final fresh air can be ensured.

[0020] In a further solution, a second filter screen support is installed at the air inlet end of the axial flow fan, and the second filter screen is detachably installed on the second filter screen support.

[0021] It can be seen that by installing a second filter screen support at the air inlet end of the axial flow fan and detachably installing the second filter screen on the second filter screen support, the disassembly and assembly of the second filter screen can be facilitated.

[0022] In a further solution, the number of ventilation holes is more than two, and more than two ventilation holes are evenly arranged along the peripheral wall of the air guiding channel.

[0023] It can be seen that by setting a plurality of ventilation holes, the air intake volume can be effectively increased, and the air intake effect can be improved.

[0024] To achieve the above-mentioned second object, the indoor air conditioner provided by the present utility model is provided with a fresh air device, and the fresh air device adopts the above-mentioned fresh air device.

[0025] To achieve the above-mentioned third object, the air conditioner provided by the present utility model includes an indoor air conditioner and an outdoor air conditioner. The indoor air conditioner and the outdoor air conditioner form a heat exchange circuit, and the indoor air conditioner adopts the above-mentioned indoor air conditioner. Description of the Drawings

[0026] Figure 1 It is a schematic cross-sectional view of the structure of an embodiment of the indoor air conditioner of the present utility model.

[0027] Figure 2 It is a structural diagram of the fresh air device in an embodiment of the indoor air conditioner of the present utility model after hiding the first filter screen.

[0028] Figure 3 It is an exploded view of the structure of the fresh air device in an embodiment of the indoor air conditioner of the present utility model.

[0029] Figure 4 It is a structural diagram of one perspective of the air guide channel in an embodiment of the indoor air conditioner of the present utility model.

[0030] Figure 5 It is a structural diagram of another perspective of the air guide channel in an embodiment of the indoor air conditioner of the present utility model.

[0031] Figure 6 It is a structural diagram of the second filter holder in an embodiment of the indoor air conditioner of the present utility model.

[0032] The present utility model will be further described below with reference to the drawings and embodiments. Detailed Embodiment

[0033] Embodiment of the indoor air conditioner:

[0034] As Figure 1 shown, in this embodiment, the indoor air conditioner is provided with a housing 1 and a fresh air device 2, and the fresh air device 2 is installed on the housing 1.

[0035] In this embodiment, referring to Figure 2 and Figure 3 , the fresh air device 2 includes a centrifugal fan 21, an air guide channel 22 and an axial flow fan 23. The first channel opening of the air guide channel 22 is communicated with the air outlet of the centrifugal fan 21, and the second channel opening of the air guide channel 22 is communicated with the air inlet end of the axial flow fan 23. The centrifugal fan 21 includes a volute 211 and a fan 212, and the fan 212 is installed in the volute 211.

[0036] Referring to Figure 4, ventilation holes 221 are provided on the peripheral wall of the air guiding channel 22. Since the air volume output by the axial flow fan 23 is greater than the air volume input by the centrifugal fan 21, and ventilation holes 221 are provided on the air guiding channel 22, the indoor air enters from the ventilation holes 221, which not only enables the axial flow fan 23 to fully exert its working ability and increase the air output volume, but also enables the indoor air to be mixed with the outside fresh air first, increasing the comfort of the fresh air.

[0037] The number of the ventilation holes 221 is more than two, and more than two ventilation holes 221 are evenly arranged along the peripheral wall of the air guiding channel 22. In this embodiment, the number of the ventilation holes 221 is four. By providing a plurality of ventilation holes 221, the air intake volume can be effectively increased and the air intake effect can be improved.

[0038] See Figure 5 , a resonance silencing cavity 222 is provided in the air guiding channel 22, and the ventilation holes 221 are communicated with the resonance silencing cavity 222. The resonance silencing cavity 222 is provided with a sound-absorbing perforated plate 223, and the ventilation holes 221 are located on the peripheral wall between the sound-absorbing perforated plate 223 and the second channel opening. The aperture and the hole pitch of the perforations on the sound-absorbing perforated plate 223 need to be set with reference to the size of the noise when the two fans are turned on. Since the centrifugal fan 21 and the axial flow fan 23 are connected in series, it may cause problems such as resonance and excessive air duct noise. Therefore, by providing the resonance silencing cavity 222 structure in the air guiding channel 22, resonance of the fresh air device 2 can be prevented and the noise of the fresh air device 2 can be reduced, improving the user experience. The resonance silencing cavity 222 is provided with a sound-absorbing perforated plate 223. When sound waves are on the surface of the sound-absorbing perforated plate 223, the sound wave interference will cause the gas to resonate in the resonance cavity, and the resonance process can convert the sound energy into heat energy, which is finally dissipated, thereby playing a role in silencing.

[0039] It can be seen from Figure 3 that a first filter support 213 and a first filter screen 214 are provided at the air inlet of the centrifugal fan 21. The first filter support 213 is installed at the air inlet of the centrifugal fan 21, and the first filter screen 214 is detachably installed on the first filter support 213. The first filter screen 214 and the first filter support 213 are detachably connected by bolts or a snap structure. By providing the first filter screen 214 at the air inlet of the centrifugal fan 21, the dust from the outside fresh air can be reduced, and the service life of the centrifugal fan 21 can be increased. By providing the first filter support 213 at the air inlet of the centrifugal fan 21 and enabling the first filter screen 214 to be detachably installed on the first filter support 213, the disassembly and assembly of the first filter screen 214 can be facilitated.

[0040] In addition, a second filter screen support 231 and a second filter screen 232 are provided at the air inlet end of the axial flow fan 23. The second filter screen support 231 is installed at the air inlet end of the axial flow fan 23, and the second filter screen 232 is detachably installed on the second filter screen support 231. The provision of the second filter screen 232 at the air inlet end of the axial flow fan 23 can reduce the dust from the room, increase the service life of the axial flow fan 23 and ensure the cleanliness of the final fresh air. The second filter screen support 231 is installed at the air inlet end of the axial flow fan 23, and the second filter screen 232 is detachably installed on the second filter screen support 231, which facilitates the disassembly and assembly of the second filter screen 232. The second filter screen 232 and the second filter screen support 231 can be detachably connected by bolts or a snap structure. For example, as Figure 6 shown, a plurality of snaps 2311 are provided on the second filter screen support 231, and the second filter screen 232 is snap-fitted on the second filter screen support 231 through the snaps 2311.

[0041] When the fresh air device 2 of this embodiment is working, the centrifugal fan 21 and the axial flow fan 23 can be respectively driven. The centrifugal fan 21 can draw in the fresh air from the outside through the air inlet of the centrifugal fan 21 and enter the air guide channel 22. At the same time, when the axial flow fan 23 is working, the indoor air can be drawn into the air guide channel 22, so that the indoor air is mixed with the fresh air and then blown into the room from the air outlet end of the axial flow fan 23. The wind speed grades of the centrifugal fan 21 and the axial flow fan 23 can be set with multiple different grades according to the rotation speeds of the centrifugal fan 21 and the axial flow fan 23. When the low wind speed is turned on, only the centrifugal fan 21 can operate and the axial flow fan 23 stops working.

[0042] As can be seen from the above, the fresh air device 2 of the present utility model connects the centrifugal fan 21 and the axial flow fan 23 in series, and ventilation holes 221 are provided on the peripheral wall of the air guide channel 22, so that the fresh air device 2 has the ability to overcome static pressure and can increase the fresh air volume. At the same time, the fresh air device 2 can mix the indoor air and the fresh air so that the temperature of the air blown out from the fresh air component of the air conditioner is closer to the room temperature than the fresh air temperature. Therefore, compared with the way of connecting two centrifugal fans in series, users have a better physical experience.

[0043] Air conditioner embodiment:

[0044] In this embodiment, the air conditioner includes an air conditioner indoor unit and an air conditioner outdoor unit. The air conditioner indoor unit and the air conditioner outdoor unit form a heat exchange circuit, and the air conditioner indoor unit adopts the air conditioner indoor unit of the above embodiment. The air conditioner indoor unit and the air conditioner outdoor unit can adopt a well-known structure to form a heat exchange circuit, which will not be elaborated here.

[0045] It should be noted that the above is only the preferred embodiment of the present utility model, but the design concept of the utility model is not limited thereto. Any non-substantive modifications made using this concept to the present utility model also fall within the protection scope of the present utility model.

Claims

1. A fresh air device, including a centrifugal fan, characterized in that: The fresh air device further includes a wind guiding channel and an axial flow fan. The first channel opening of the wind guiding channel is communicated with the air outlet of the centrifugal fan, and the second channel opening of the wind guiding channel is communicated with the air inlet end of the axial flow fan; Ventilation holes are arranged on the peripheral wall of the wind guiding channel.

2. The fresh air device according to claim 1, characterized in that: A resonance sound absorption cavity is arranged in the wind guiding channel, and the ventilation holes are communicated with the resonance sound absorption cavity.

3. The fresh air device according to claim 2, characterized in that: The resonance sound absorption cavity is provided with a sound absorption perforated plate, and the ventilation holes are located on the peripheral wall between the sound absorption perforated plate and the second channel opening.

4. The fresh air device according to any one of claims 1 to 3, characterized in that: A first filter screen is arranged at the air inlet of the centrifugal fan.

5. The fresh air device according to claim 4, characterized in that: A first filter screen bracket is installed at the air inlet of the centrifugal fan, and the first filter screen is detachably installed on the first filter screen bracket.

6. The fresh air device according to any one of claims 1 to 3, characterized in that: A second filter screen is arranged at the air inlet end of the axial flow fan.

7. The fresh air device according to claim 6, characterized in that: A second filter screen bracket is installed at the air inlet end of the axial flow fan, and the second filter screen is detachably installed on the second filter screen bracket.

8. The fresh air device according to any one of claims 1 to 3, characterized in that: The number of the ventilation holes is more than two, and more than two ventilation holes are uniformly arranged along the peripheral wall of the wind guiding channel.

9. An air conditioner indoor unit is provided with a fresh air device, characterized in that: The fresh air device adopts the fresh air device according to any one of claims 1 to 8.

10. An air conditioner, including an air conditioner indoor unit and an air conditioner outdoor unit, the air conditioner indoor unit and the air conditioner outdoor unit form a heat exchange circuit, characterized in that: The air conditioner indoor unit adopts the air conditioner indoor unit according to claim 9.

Images