Fresh air device and air conditioner

Abstract

The application provides a fresh air device and an air conditioner. The fresh air device comprises a double-suction centrifugal fan, the axial double sides of the double-suction centrifugal fan are respectively provided with a first air suction port and a second air suction port; a first air duct and a second air duct which are independent of each other are arranged in the double-suction centrifugal fan, the outer periphery of the double-suction centrifugal fan is provided with a first air outlet and a second air outlet, the first air suction port, the first air duct and the first air outlet are sequentially communicated, the second air suction port, the second air duct and the second air outlet are sequentially communicated; the fresh air device further comprises a pipeline structure, the pipeline structure is provided with a first channel and a second channel which are independent of each other, the first channel comprises a first channel port and a second channel port, the second channel comprises a third channel port and a fourth channel port, the second channel port is communicated with the first air suction port, and the fourth channel port is communicated with the second air outlet. The air conditioner comprises the fresh air device. The fresh air device is designed based on the double-suction centrifugal fan, can be installed and arranged at a limited position in an indoor unit, and can also meet the multifunctional requirements of sending fresh air and discharging old air.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically to a fresh air device and an air conditioner. Background Technology

[0002] An indoor unit of an air conditioner includes a main body, a heat exchanger disposed within the main body, and a fresh air device. The main body has an air inlet and a fresh air outlet. The fresh air device includes a dual-suction centrifugal fan, which includes a volute, a dual-shaft motor, a first centrifugal fan blade, and a second centrifugal fan blade. The volute has a first fresh air inlet and a second fresh air inlet on its axial sides, respectively, and a fresh air outlet on its outer periphery. The dual-shaft motor, the first centrifugal fan blade, and the second centrifugal fan blade are all disposed within the volute. The first centrifugal fan blade is opposite to the first fresh air inlet, and the second centrifugal fan blade is opposite to the second fresh air inlet. After the dual-shaft motor drives the first and second centrifugal fan blades to rotate, airflow can be drawn in from the first and second fresh air inlets and discharged from the fresh air outlet. The first fresh air inlet is connected to the outside, the second fresh air inlet is connected to the heat exchanger, and the fresh air outlet is connected to the fresh air outlet of the main body. Thus, when the dual-suction centrifugal fan is working, it can draw in outdoor fresh air through the first fresh air inlet and draw in indoor stale air that has been drawn in from the air inlet and heat-exchanged by the heat exchanger through the second fresh air inlet. The outdoor fresh air and indoor stale air are mixed in the fresh air device and then sent out to the outside in sequence through the fresh air outlet and the fresh air outlet.

[0003] The existing fresh air system of this type of air conditioner is based on a dual-suction centrifugal fan to solve the temperature difference between the new and old air, but it does not have the function of exhausting the old indoor air to the outside. Summary of the Invention

[0004] The primary objective of this invention is to provide a fresh air device based on a dual-suction centrifugal fan that can also perform the function of exhausting old air.

[0005] A second objective of the present invention is to provide an air conditioner employing the above-described fresh air device.

[0006] The first objective of this invention is to provide a fresh air device comprising a dual-suction centrifugal fan, wherein a first air intake and a second air intake are respectively provided on both sides of the axial direction of the dual-suction centrifugal fan; a first air duct and a second air duct are provided inside the dual-suction centrifugal fan, and a first air outlet and a second air outlet are provided on the outer periphery of the dual-suction centrifugal fan; the first air intake, the first air duct and the first air outlet are sequentially connected, and the second air intake, the second air duct and the second air outlet are sequentially connected; the fresh air device also includes a duct structure, wherein the duct structure has a first channel and a second channel, the first channel includes a first channel opening and a second channel opening, the second channel includes a third channel opening and a fourth channel opening, the second channel opening is connected to the first air intake, and the fourth channel opening is connected to the second air outlet.

[0007] As can be seen from the above scheme, under this configuration, the second air intake can be connected to the old air inlet of the air conditioner; the first air outlet is connected to the fresh air outlet of the air conditioner; and both the first and third channel openings are connected to the outside. In this way, fresh outdoor air is drawn in and sent to the room through the first channel and the fresh air outlet of the air conditioner, while old indoor air can be drawn in from the old air inlet and sent to the outside through the second channel. Due to the axial arrangement of the two air ducts under the configuration of the dual-suction centrifugal fan, the fresh air device has a smaller size. Therefore, the fresh air device of the present invention is based on the design of the dual-suction centrifugal fan, which can be installed in a limited position in the indoor unit and can also meet the multi-functional needs of supplying fresh air and exhausting old air.

[0008] A further embodiment is that the outer periphery of the dual-suction centrifugal fan is also provided with a third air outlet connected to the second air duct; the second duct also includes a fifth channel outlet; the duct structure includes a chamber structure, the chamber structure includes a first outlet, a second outlet and a third outlet, the first outlet is connected to the second air intake, the second outlet is connected to the outside, and the third outlet is connected to the fifth channel outlet; the fresh air device also includes a second opening and closing mechanism; when the second opening and closing mechanism is in the first state, the second outlet is open and the third outlet is closed; when the second opening and closing mechanism is in the second state, the second outlet is closed and the third outlet is open.

[0009] As can be seen from the above, with this duct structure, after the second opening / closing mechanism changes to the second state, the second port closes and the third port opens. At this time, a dual-channel synchronous mode can be implemented, where both the first and second channels supply fresh air. In this function, the first channel still supplies fresh air, but the second channel is not used for sewage discharge. Instead, under the negative pressure of the second air intake, outdoor fresh air enters through the second channel and is sent into the second air duct through the third port, and finally exits from the third air outlet. Therefore, in this mode, both channels supply fresh air to the room, which can quickly replenish the indoor fresh air volume.

[0010] A further improvement is that the fresh air system also includes a third opening and closing mechanism, which is located at the third air outlet.

[0011] As can be seen from the above, in the dual-channel synchronous mode where both the first and second channels supply fresh air, the third air outlet is closed by the third opening and closing mechanism, and the second opening and closing mechanism is then controlled to change to the first state, opening the second outlet and closing the third outlet. Under this setting, it can be switched to the original dual-channel asynchronous mode where fresh air is introduced and old air is exhausted at the same time.

[0012] A further proposed solution is that the pipeline structure includes a first pipe structure, the interior of which is divided into a first pipeline section and a second pipeline section, which are independent of each other. The first pipeline section serves as a first channel and is connected to the first air intake. The second pipeline section serves as part of the second channel.

[0013] As can be seen from the above, with this setup, the first and second access sections are set up in the same pipe. The installation requirements of the two channels can be met at the same time by using only one pipe fitting to pass through the wall to the outside. This not only reduces the size but also facilitates wall installation.

[0014] A further proposed solution is that the pipeline structure also includes a second pipe structure, with the second channel formed within the first and second pipe structures. The pipe openings at both ends of the extension of the second pipe structure are respectively connected to the second pipeline section and the third outlet, and the pipe opening in the middle of the second pipe structure is connected to the second air outlet.

[0015] As can be seen from the above, under this configuration, with the first pipe structure already in place, the second channel can be completed simply by adding a pipe fitting with three ports on one side of the double-suction centrifugal fan, making the structure simple.

[0016] Another further option is that the fresh air device also includes a first opening and closing mechanism, which is located between the first channel and the first air intake.

[0017] As can be seen from the above, when the first opening and closing mechanism is closed, it can cut off the first channel and the first air duct. In this mode, the first air duct cannot draw in fresh air through the first channel, and can only exhaust old air through the second air duct.

[0018] A further proposed solution is to use an iris recognition mechanism for the first opening and closing mechanism.

[0019] As can be seen from the above, using an iris recognition mechanism for the first opening and closing mechanism can further reduce space occupation.

[0020] Another further solution is that the double-suction centrifugal fan includes a volute and centrifugal blades disposed inside the volute. The centrifugal blades include a base and a first blade section and a second blade section connected to opposite sides of the base. The first blade section is disposed in a first air duct, the second blade section is disposed in a second air duct, and the base is separated between the first air duct and the second air duct.

[0021] A further design includes a baffle located inside the casing, which is positioned around the centrifugal fan blades and serves as a barrier between the first and second air ducts.

[0022] As can be seen from the above, in the background technology, since the fresh air and old air in the axially drawn-in fan need to be mixed, the two air ducts are required to be interconnected. However, this setting does not match the requirement of the present invention that the first air duct and the second air duct are independent of each other. Therefore, the present invention also optimizes the internal structure of the fan. By adding a baffle at the base of the centrifugal fan blade, the first air duct and the second air duct are effectively isolated to avoid affecting the realization of the function.

[0023] The second objective of this invention is to provide an air conditioner with a fresh air outlet and a used air inlet; the air conditioner includes the aforementioned fresh air device; a first air outlet is connected to the fresh air outlet, a second air inlet is connected to the used air inlet, and a first channel opening and a third channel opening are both connected to the outside.

[0024] As can be seen from the above scheme, the dual-suction centrifugal fan configuration with two air ducts arranged axially results in a smaller size for the fresh air device. Therefore, the fresh air device of the present invention, based on the dual-suction centrifugal fan design, can be installed in a limited location within the indoor unit and can also achieve multiple functions such as simultaneously supplying fresh air and exhausting old air through two channels, supplying fresh air through both channels, and exhausting old air through only one channel. Attached Figure Description

[0025] Figure 1 This is an exploded view of the structure of the first embodiment of the fresh air device of the present invention.

[0026] Figure 2 This is a schematic diagram of the first opening and closing mechanism in the closed state in the first embodiment of the fresh air device of the present invention.

[0027] Figure 3 This is a schematic diagram of the intermediate state of the first opening and closing mechanism in the first embodiment of the fresh air device of the present invention.

[0028] Figure 4 This is a schematic diagram of the first opening and closing mechanism in the open state in the first embodiment of the fresh air device of the present invention.

[0029] Figure 5 This is a cross-sectional view of the dual-channel asynchronous mode of the first embodiment of the fresh air device of the present invention.

[0030] Figure 6 This is a schematic diagram of the airflow principle in the dual-channel asynchronous mode of the first embodiment of the fresh air device of the present invention.

[0031] Figure 7 This is a cross-sectional view of the dual-channel synchronous mode of the first embodiment of the fresh air device of the present invention.

[0032] Figure 8 This is a schematic diagram of the airflow principle in the dual-channel synchronous mode of the first embodiment of the fresh air device of the present invention.

[0033] Figure 9 This is a cross-sectional view of the single-channel sewage discharge mode of the first embodiment of the fresh air device of the present invention.

[0034] Figure 10 This is a schematic diagram of the airflow principle in the single-channel sewage discharge mode of the first embodiment of the fresh air device of the present invention.

[0035] Figure 11 This is a schematic diagram of the airflow principle of the second embodiment of the fresh air device of the present invention. Detailed Implementation

[0036] First Embodiment See Figure 1 The fresh air device in this embodiment includes a dual-suction centrifugal fan, a duct structure 3, a first opening and closing mechanism 41, a second opening and closing mechanism 42, and a third opening and closing mechanism 43.

[0037] The dual-suction centrifugal fan includes a volute 1 and centrifugal fan blades 2 disposed within the volute 1. The volute 1 includes a first shell 11, a second shell 12, and a partition 13. The first shell 11 and the second shell 12 are joined together along the axial direction of the dual-suction centrifugal fan to form the external structure of the volute 1. The partition 13 serves as the internal structure of the volute 1 and is disposed between the first shell 11 and the second shell 12. The centrifugal fan blades 2 include a base 23 and a first fan blade section 21 and a second fan blade section 22 connected to opposite sides of the base 23.

[0038] Combination Figure 5 The double-suction centrifugal fan has a first air inlet 181 and a second air inlet 182 on both sides of its axial direction. The outer periphery of the double-suction centrifugal fan has a first air outlet 191, a second air outlet 192, and a third air outlet 193. A base 23 is positioned between the first air duct 101 and the second air duct 102. A baffle 13 is positioned on the outer periphery of the centrifugal fan blades 2 and is also positioned between the first air duct 101 and the second air duct 102. The separation provided by the base 23 and the baffle 13 reduces the internal shape of the double-suction centrifugal fan. A first air duct 101 and a second air duct 102 are arranged axially opposite to each other and are independent of each other. A first fan blade 21 is arranged in the first air duct 101, and a second fan blade 22 is arranged in the second air duct 102. A first air intake 181, a first air duct 101 and a first air outlet 191 are connected in sequence. A second air intake 182, a second air duct 102 and a second air outlet 192 are connected in sequence. A second air intake 182, a second air duct 102 and a third air outlet 193 are connected in sequence.

[0039] In addition, the pipe structure 3 includes a first pipe structure 31, a second pipe structure 32, and a chamber structure 33. The first pipe structure 31 is generally cylindrical and has forks; further combined with Figure 5 The interior of the first pipe structure 31 is divided into a first pipe section 311 and a second pipe section 312, which are independent of each other. The first pipe section 311 has a larger cross section and extends through both ends of the first pipe structure 31. The second pipe section 312 has a smaller cross section and extends between one end of the first pipe structure 31 and the fork that extends outward toward the periphery.

[0040] The second tube structure 32 is a straight tube extending but with both ends bending to the same side. It has openings at both ends and a third opening in the middle section, which refers to the portion beyond the two ends. Furthermore, for ease of fabrication, the second tube structure 32 is formed by joining symmetrical first and second half-tubes 321 and 322. The chamber structure 33 is a box-shaped structure with openings on three sides: a first opening 331, a second opening 332, and a third opening 333. All three openings connect to the inner cavity of the box.

[0041] In addition, the first opening and closing mechanism 41 adopts an iris mechanism, which is existing technology in this field, combined with Figures 2 to 4 The diagram shows the change from a closed state to an intermediate state and then to an open state. It can rotate to open in all directions and rotate to close in the center, and it occupies relatively little space. Both the second opening and closing mechanism 42 and the third opening and closing mechanism 43 include a swingable baffle structure.

[0042] See Figure 1 and Figure 5 First, the first pipe section 311 of the first pipe structure 31 is connected to the first air intake 181 of the volute 1. The first channel section 311 serves as the first channel 301 in the fresh air device of the present invention. The first channel 301 includes a first channel opening 301a and a second channel opening 301b, which are the pipe openings at both ends of the first pipe section 311.

[0043] The second duct section 312 is connected to the second pipe structure 32 to form the second channel 302 in the fresh air device of the present invention. The second channel 302 includes a third channel opening 302a, a fourth channel opening 302b, and a fifth channel opening 302c. The third channel opening 302a and the first channel opening 301a are different regions of the outer duct opening on the first pipe structure 31 away from the volute 1, and both are connected to the outside. The fourth channel opening 302b is the duct opening extending to the middle of the second pipe structure 32, and the fifth channel opening 302c is the duct opening extending to the second end of the second pipe structure 32.

[0044] The first opening 331 of the chamber structure 33 is connected to the second air intake 182, the second opening 332 is connected to the outside, the pipe opening at the first end of the extension of the second pipe structure 32 is connected to the pipe opening of the second pipe section 312 of the first pipe structure 31, the pipe opening at the second end of the extension of the second pipe structure 32 (the fifth channel opening 302c) is connected to the third opening 333, and the pipe opening in the middle of the second pipe structure 32 (the fourth channel opening 302b) is connected to the second air outlet 192.

[0045] Furthermore, the first opening and closing mechanism 41 is disposed between the first channel 301 and the first air intake 181. When the first opening and closing mechanism 41 is closed, it can cut off the connection between the first channel 301 and the first air duct 101. The second opening and closing mechanism 42 is disposed in the chamber structure 33. When the second opening and closing mechanism 42 is in the first state, the second port 332 is open and the third port 333 is closed. When the second opening and closing mechanism 42 is in the second state, the second port 332 is closed and the third port 333 is open. The third opening and closing mechanism 43 is disposed in the third air outlet 193. The third opening and closing mechanism 43 can close the third air outlet 193.

[0046] The air conditioner in this embodiment includes an indoor unit, which has a fresh air outlet and a used air inlet. The air conditioner includes a fresh air device, the first air outlet 191 and the open third air outlet 193 of the fresh air device are both connected to the fresh air outlet, the second air intake 182 can be connected to the used air inlet through the open second port 332, and the first channel port 301a and the third channel port 302a are both connected to the outside.

[0047] See Figure 5 and Figure 6 At this time, the fresh air device is in dual-channel asynchronous mode. At this time, the first opening and closing mechanism 41 is open, and the first channel 301 is connected to the first air duct 101. At this time, the second opening and closing mechanism 42 is in the first state, the second port 332 is open and the third port 333 is closed. In addition, the third air outlet 193 is closed by the third opening and closing mechanism 43.

[0048] Thus, when the wind turbine is working, such as Figure 6 As shown by the solid red line, fresh outdoor air is drawn in through the first channel opening 301a, passes through the first channel 301, the first air duct 101, and the first air outlet 191, and is then delivered indoors through the fresh air outlet of the air conditioner. Figure 6 As shown by the blue dotted line, the indoor stale air can be drawn in from the stale air inlet of the air conditioner, enter the chamber structure through the second inlet 332, and then pass through the second air duct 102 and the second channel 302 in sequence before being discharged to the outside through the third channel inlet 302a.

[0049] See Figure 7 and Figure 8 At this time, the fresh air device is in dual-channel synchronous mode. At this time, the first opening and closing mechanism 41 is opened, and the first channel 301 is connected to the first air duct 101. At this time, the second opening and closing mechanism 42 is in the second state, the second port 332 is closed and the third port 333 is opened. In addition, at this time, the third opening and closing mechanism 43 opens the third air outlet 193.

[0050] In this mode, after the second opening / closing mechanism 42 changes to the second state, the second port 332 closes and the third port 333 opens. At this time, a dual-channel synchronous mode in which both the first channel 301 and the second channel 302 supply fresh air can be implemented, such as... Figure 8 As shown by the red solid line, under this function, the first channel 301 still supplies fresh air; that is, outdoor fresh air is drawn in from the first channel opening 301a, passes through the first channel 301, the first air duct 101, and the first air outlet 191, and is then delivered to the fresh air outlet of the air conditioner and into the room. The second channel 302 is not used for sewage discharge. Due to the closure of the second outlet 332 and the opening of the third outlet 333, such as... Figure 8 As shown by the red solid line, under the negative pressure of the second air intake 182, outdoor fresh air enters the second channel 302 through the third channel opening 302a, and then enters through the third opening 333, the chamber structure 33, the second air duct 102, and the third air outlet 193 before being delivered to the fresh air outlet of the air conditioner and into the room. Therefore, in this mode, both channels supply fresh air into the room, which can quickly replenish the indoor fresh air volume.

[0051] See Figure 9 and Figure 10 At this time, the fresh air device is in single-channel sewage discharge mode. At this time, the first opening and closing mechanism 41 is closed, and the first channel 301 is disconnected from the first air duct 101. At this time, the second opening and closing mechanism 42 is in the first state, the second port 332 is open and the third port 333 is closed. In addition, at this time, the third opening and closing mechanism 43 closes the third air outlet 193.

[0052] In this mode, the first channel 301 is disconnected from the first air duct 101. Even if the fan is working, the first air duct 101 cannot draw in fresh air through the first channel 301. Figure 10 As shown by the blue dashed line, the old air is only discharged through the second air duct 302. That is, the old indoor air is drawn in from the old air inlet of the air conditioner, enters the cavity structure 33 through the second opening 332, and then passes through the second air duct 102 and the second channel 302 in sequence before being discharged to the outside through the third channel opening 302a.

[0053] Therefore, the fresh air device of the present invention is based on a dual-suction centrifugal fan design. The two air ducts are arranged axially, which makes the fresh air device smaller in size. It can be installed in a limited position in the indoor unit and can also realize multiple functions such as simultaneously supplying fresh air and exhausting old air through two channels, supplying fresh air through both channels, and exhausting old air through only one channel.

[0054] Second Embodiment See Figure 11 Compared to the first embodiment, the volute of this embodiment does not have a third air outlet connected to the second air duct 502, and the pipe structure does not have a chamber structure. Furthermore, this embodiment does not include the first opening and closing mechanism, the second opening and closing mechanism, and the third opening and closing mechanism.

[0055] Under this configuration, the fan in this embodiment operates in a dual-channel asynchronous mode. The first channel 511, the first air duct 501, and the first air outlet 591 deliver fresh air, while the second air duct 502, the second air outlet 592, and the second channel 512 are connected to exhaust old air.

[0056] Finally, it should be emphasized that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fresh air device, including a dual-suction centrifugal fan, wherein the dual-suction centrifugal fan is provided with a first air inlet and a second air inlet on both sides of its axial direction; Its features are: The dual-suction centrifugal fan is provided with an independent first air duct and a second air duct. The outer periphery of the dual-suction centrifugal fan is provided with a first air outlet and a second air outlet. The first air inlet, the first air duct and the first air outlet are connected in sequence, and the second air inlet, the second air duct and the second air outlet are connected in sequence. The fresh air device also includes a duct structure, which has a first channel and a second channel that are independent of each other. The first channel includes a first channel opening and a second channel opening, and the second channel includes a third channel opening and a fourth channel opening. The second channel opening is connected to the first air intake, and the fourth channel opening is connected to the second air outlet.

2. The fresh air device according to claim 1, characterized in that: The outer periphery of the double-suction centrifugal fan is also provided with a third air outlet that communicates with the second air duct; The second channel also includes a fifth channel port; The pipeline structure includes a chamber structure, which includes a first port, a second port, and a third port. The first port is connected to the second air intake, the second port is connected to the outside, and the third port is connected to the fifth channel port. The fresh air device also includes a second opening and closing mechanism; When the second opening and closing mechanism is in the first state, the second port is open and the third port is closed; When the second opening and closing mechanism is in the second state, the second port is closed and the third port is open.

3. The fresh air device according to claim 2, characterized in that: The fresh air device also includes a third opening and closing mechanism, which is disposed in the third air outlet.

4. The fresh air device according to claim 2, characterized in that: The pipeline structure includes a first pipe structure, the interior of which is divided into a first pipeline section and a second pipeline section that are independent of each other. The first pipe section serves as the first channel, and the first pipe section is connected to the first air intake. The second pipe section is part of the second channel.

5. The fresh air device according to claim 4, characterized in that: The pipeline structure also includes a second pipe structure. The second channel is formed within the second pipeline section and the second pipe structure. The pipe openings at both ends of the extension of the second pipe structure are respectively connected to the second pipeline section and the third opening. The pipe opening in the middle of the second pipe structure is connected to the second air outlet.

6. The fresh air device according to any one of claims 1 to 5, characterized in that: The fresh air device also includes a first opening and closing mechanism, which is disposed between the first channel and the first air intake.

7. The fresh air device according to claim 6, characterized in that: The first opening and closing mechanism adopts an iris recognition mechanism.

8. The fresh air device according to any one of claims 1 to 5, characterized in that: The dual-suction centrifugal fan includes a volute and centrifugal blades disposed within the volute. Each centrifugal blade includes a base and a first blade portion and a second blade portion connected to opposite sides of the base. The first blade portion is disposed in the first air duct, and the second blade portion is disposed in the second air duct. The base is positioned between the first air duct and the second air duct.

9. The fresh air device according to claim 8, characterized in that: The volute also includes a partition located inside itself, which is disposed on the outer periphery of the centrifugal fan blade and blocks the space between the first air duct and the second air duct.

10. Air conditioner with fresh air outlet; Its features are: The air conditioner also has a used air inlet; Includes the fresh air device as described in any one of claims 1 to 9; The first air outlet is connected to the fresh air outlet, the second air intake can be connected to the old air inlet, and both the first channel opening and the third channel opening are connected to the outside.

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