Air conditioner

Abstract

The invention provides an air conditioner which comprises a centrifugal fan used for indoor air circulation, the centrifugal fan is arranged in a volute, a positive pressure area can be formed in the volute when the centrifugal fan works, and in the axial direction of the centrifugal fan, the volute comprises an outer side plate and an inner side plate; the outer side plate is closer to the outside than the inner side plate; an exhaust hole is formed in the outer side plate, and the exhaust hole is located in the positive pressure area and can lead to the outside; a baffle is arranged at the position of the exhaust hole, the baffle rotates in a preset plane to change the size of the ventilation area of the exhaust hole, and then the effect of supplying fresh air into a room is achieved on the basis that the appearance size of the air conditioner is not increased.

Description

Technical Field

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

[0002] With the continuous advancement of technology, air conditioning products are also developing rapidly. Currently, air conditioner upgrades are increasingly focused on intelligence, comfort, and health, and the presence of a fresh air function has become an important factor for consumers when choosing an air conditioner. However, most current window air conditioners use a lever-type fresh air damper structure. Because lever-type dampers have a large lateral movement range when opening, their placement is limited to the air outlet frame. Consequently, many window air conditioners cannot add a fresh air function due to overall structural limitations.

[0003] How to add fresh air supply function to existing window air conditioners without increasing the overall size of the window air conditioner is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] Therefore, the present invention provides an air conditioner that adds a fresh air delivery function without increasing the external size of the air conditioner.

[0005] This invention provides an air conditioner, including a centrifugal fan for indoor air circulation. The centrifugal fan is disposed within a volute casing. When the centrifugal fan is operating, it can create a positive pressure zone within the volute casing. In the axial direction of the centrifugal fan, the volute casing includes an outer side plate and an inner side plate, with the outer side plate being closer to the outside than the inner side plate. An exhaust port is provided on the outer side plate, located within the positive pressure zone and capable of opening to the outside. A baffle is provided at the exhaust port, and the baffle can rotate within a predetermined plane to change the size of the ventilation area of ​​the exhaust port.

[0006] In some embodiments, the outer side plate is provided with a first bushing, and the baffle is provided with a rotating shaft, a portion of which is rotatably disposed within the first bushing; one end of the first bushing is provided with a wave structure, the wave structure including at least one crest and two troughs on both sides of the crest, and a guide rod is fixedly disposed on the rotating shaft. During the rotation of the baffle by the rotating shaft, the guide rod slides along the wave structure. When the guide rod is not located at the trough, the baffle separates from the outer side plate. When the guide rod is located at the trough, the baffle is attached to the outer side plate and the exhaust port is fully opened or fully closed.

[0007] In some embodiments, the wave structure includes at least two crests and three troughs, the three troughs being sequentially a first trough, a second trough, and a third trough. When the guide rod is located at the first trough, the baffle fully opens the vent hole; when the guide rod is located at the third trough, the baffle fully closes the vent hole; and when the guide rod is located at the second trough, the baffle partially covers the vent hole.

[0008] In some embodiments, an elastic element is sleeved on the rotating shaft, and the elastic element always has the potential energy to move the baffle toward the outer side plate.

[0009] In some embodiments, a second bushing is provided on the inner side plate, and the rotating shaft extends through the second bushing toward the interior for a predetermined length. The portion of the rotating shaft within the predetermined length range is a drive section, through which the user can rotate the rotating shaft.

[0010] In some embodiments, a first motor is provided on the volute, and the first motor can drive the rotating shaft to rotate via the drive section.

[0011] In some embodiments, a second motor is provided on the outer side plate, a connecting sleeve is fixed on the output shaft of the second motor, a groove extending axially along the output shaft is provided on the connecting sleeve, a slider is fixed on the rotating shaft, the rotating shaft is inserted into the connecting sleeve, and the slider is slidably engaged in the groove.

[0012] In some embodiments, the baffle is disposed outside the volute, and the elastic element is disposed between the connecting sleeve and the baffle and is subjected to pressure.

[0013] In some embodiments, the air conditioner includes an outdoor unit, which includes an outdoor fan; an exhaust pipe is provided between the exhaust vent and the outdoor fan, the air inlet of the exhaust pipe covers the exhaust vent, the air outlet of the exhaust pipe faces the air inlet side of the outdoor fan, and the outdoor fan creates a negative pressure on the air inlet side when it is working.

[0014] In some embodiments, the outdoor unit includes a condenser disposed on the outlet side of the outdoor fan.

[0015] In some embodiments, the air conditioner is a window air conditioner or a through-wall air conditioner;

[0016] The air conditioner includes a chassis, and the outdoor unit and the volute are both mounted on the chassis.

[0017] In some embodiments, when a rotating shaft is provided, the portion of the rotating shaft located within the volute includes a guide section, the cross-sectional shape of which is flat.

[0018] When the baffle completely closes the exhaust hole, the guide section can guide the airflow inside the volute to improve the stability of the airflow inside the volute; when the baffle completely opens the exhaust hole, the guide section can block the airflow inside the volute to change the direction of the airflow, thereby accelerating the airflow from the exhaust hole out of the volute.

[0019] In some embodiments, the guide section includes an arc-shaped plate, the concave surface of which faces the center of the volute when the baffle completely closes the exhaust port.

[0020] This invention creates a negative pressure inside the room by setting an exhaust vent on the outer side panel closest to the outside and adjusting the ventilation area of ​​the vent by rotating a baffle. This allows outside air to enter the room through gaps in the doors and windows, thus supplying fresh air. This solution does not alter the overall appearance or size of the air conditioner. Therefore, it achieves the goal of supplying fresh air to the room without changing the overall dimensions of the existing air conditioner. Attached Figure Description

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the volute and centrifugal fan according to an embodiment of the present invention;

[0023] Figure 2 This is a radial schematic diagram of the plotter according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the first bushing according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of an air conditioner in an embodiment of the present invention that is a window air conditioner;

[0026] Figure 5 This is an embodiment of the present invention. Figure 4 Another perspective illustration;

[0027] Figure 6 This is a schematic diagram of a portion of the volute housing provided with a rotating shaft and an exhaust vent in an embodiment of the present invention;

[0028] Figure 7 This is an embodiment of the present invention. Figure 6 Another perspective illustration;

[0029] Figure 8 This is a schematic diagram of the baffle completely covering the exhaust hole (completely closing the exhaust hole) in an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the baffle covering the exhaust hole in an embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of an embodiment of the present invention where the baffle does not cover the exhaust hole (the exhaust hole is fully open);

[0032] Figure 11 This is a schematic diagram showing the mutual relationship between the volute, centrifugal fan, and baffle when a second motor is provided in an embodiment of the present invention;

[0033] Figure 12 This is a schematic diagram showing the relationship between the second motor, the baffle, and the volute in an embodiment of the present invention;

[0034] Figure 13 This is a schematic diagram showing the relationship between the second motor, connecting sleeve, rotating shaft elastic element, baffle, and first bushing in an embodiment of the present invention.

[0035] Figure 14 This is an embodiment of the present invention. Figure 13 Based on this, a schematic diagram of the second motor driving the baffle to rotate a certain angle;

[0036] Figure 15 This is a first-view schematic diagram of a window air conditioner with an exhaust pipe according to an embodiment of the present invention;

[0037] Figure 16 This is a second-view schematic diagram of a window air conditioner with an exhaust pipe according to an embodiment of the present invention.

[0038] The attached figures are labeled as follows:

[0039] 1. Volute; 101. Outer side plate; 102. Inner side plate; 2. Centrifugal fan; 3. Outdoor fan; 4. Chassis; 501. Exhaust vent; 502. Baffle; 503. Rotating shaft; 5031. Drive section; 5032. Guide section; 601. First bushing; 602. Second bushing; 603. Wave structure; 604. Wave crest; 605. Wave trough; 701. Guide rod; 702. Elastic element; 801. Connecting sleeve; 802. Second motor; 803. Slide groove; 804. Slider; 9. Exhaust pipe. Detailed Implementation

[0040] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. 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.

[0041] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0042] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0043] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0044] See also Figure 1-16As shown, the present invention provides an air conditioner including a centrifugal fan 2 for indoor air circulation. The centrifugal fan 2 is disposed inside a volute 1. When the centrifugal fan 2 is working, it can form a positive pressure zone inside the volute 1. In the axial direction of the centrifugal fan 2, the volute 1 includes an outer side plate 101 and an inner side plate 102. The outer side plate 101 is closer to the outside than the inner side plate 102. An exhaust hole 501 is provided on the outer side plate 101. The exhaust hole 501 is located in the positive pressure zone and can lead to the outside. A baffle 502 is provided at the exhaust hole 501. The baffle 502 can rotate within a preset plane to change the size of the ventilation area of ​​the exhaust hole 501.

[0045] The rotation of the baffle 502 changes the ventilation area of ​​the exhaust hole 501, including fully opening the exhaust hole, at which time the ventilation area of ​​the exhaust hole 501 is the largest, and fully closing the exhaust hole, at which time the ventilation area of ​​the exhaust hole 501 is the smallest.

[0046] When the air conditioner of this application is working, and fresh air needs to be supplied to the room, the baffle 502 rotates to open the exhaust port 501. Different rotation angles of the baffle 502 result in different ventilation areas of the exhaust port 501. The structure of the baffle 502 is relatively simple and easy to implement. Since the centrifugal fan 2 creates a positive pressure zone, and the exhaust port 501 is also located in the positive pressure zone, the centrifugal fan 2 causes some air inside the volute 1 to be discharged to the outside through the exhaust port 501. Simultaneously, as indoor air flows out through the exhaust port 501, the indoor pressure drops, creating a negative pressure. Fresh outdoor air can enter the room through window gaps, door gaps, and other gaps, thus achieving the purpose of replenishing the room with fresh air. Compared with existing technologies, the air conditioner of this application achieves the purpose of exhausting air to the outside and creating a negative pressure in the room by simply setting a rotating baffle 502 on the volute 1. Fresh outdoor air enters the room through room gaps, completing the purpose of replenishing fresh air without changing the external dimensions of the air conditioner. That is, the function of supplying fresh air is achieved without changing the external size of the air conditioner. In addition, the different rotation angles of the baffle 502 can control the speed of negative pressure formation, thereby allowing the user to adjust the speed of exhaust to the outside according to their needs. This avoids excessively fast exhaust, which could lead to rapid changes in indoor temperature and a decline in user experience. If the indoor temperature changes too quickly, the air conditioner needs to be controlled again to cool or heat in order to reach the required temperature, which increases energy consumption. The adjustable exhaust speed of this application can prevent excessive changes in indoor temperature, thereby saving energy and achieving a balance between ventilation and energy saving.

[0047] Furthermore, the preset plane is a plane parallel to the outer side plate 101. The surface of the baffle 502 is parallel to the surface of the outer side plate 102.

[0048] Furthermore, the exhaust vent 501 can be configured as a fan shape, rectangle, triangle, or circle. Correspondingly, the shape of the baffle 502 is similar to that of the exhaust vent 501.

[0049] Centrifugal fan 2 includes centrifugal fan blades.

[0050] Preferred, such as Figure 3 and Figure 4 As shown, the outer side plate 101 is provided with a first bushing 601, and the baffle 502 is provided with a rotating shaft 503. A portion of the rotating shaft 503 is rotatably disposed within the first bushing 601. One end of the first bushing 601 is provided with a wave structure 603, which includes at least one wave crest 604 and wave troughs 605 on both sides of the wave crest 604. A guide rod 701 is fixedly disposed on the rotating shaft 503. During the rotation of the baffle 502 driven by the rotating shaft 503, the guide rod 701 slides along the wave structure 603. When the guide rod 701 is not located at the wave trough 605, the baffle 502 is separated from the outer side plate 101. When the guide rod 701 is located at the wave trough 605, the baffle 502 is attached to the outer side plate 101 and the exhaust port 501 is fully opened or fully closed.

[0051] Compared to first axially pulling the rotating shaft 503 to separate the baffle 502 from the outer plate 101, then rotating it, and finally pushing the rotating shaft 503 back after rotation, this application uses a wave structure 603. The baffle 502 fully opens or closes the exhaust port 501 at the trough 605, and the guide rod 701 is stabilized at the trough 605 by the wave crest 604. This ensures that the exhaust port 501 remains stable whether closed or open.

[0052] The rotation of the shaft 503 drives the guide rod 701 to slide along the wave structure 603. When the guide rod 701 is not located in the trough 605, that is, during the process of the guide rod 701 sliding out of the trough 605 but not yet entering another trough 605, the baffle 502 separates from the outer plate 101, avoiding friction between the baffle 502 and the outer plate 101 when the baffle 502 rotates. When the guide rod 701 is located in the trough 605, the baffle 502 is in contact with the outer plate 101 and the exhaust hole 501 is fully opened or fully closed. This ensures that when the exhaust hole 501 is fully closed, the baffle 502 is in contact with the outer plate 101, improving the sealing performance of the baffle 502 on the exhaust hole 501; when the exhaust hole 501 is fully open and the baffle 502 is located inside the volute 1, air inside the volute 1 will not enter or rarely enters between the baffle 502 and the outer plate 101, which helps to maintain smooth airflow.

[0053] Preferred, such as Figure 3 and Figure 4As shown, the wave structure 603 includes at least two wave crests 604 and three wave troughs 605. The three wave troughs 605 are sequentially named a first wave trough 605, a second wave trough 605, and a third wave trough 605. When the guide rod 701 is located at the first wave trough 605, the baffle 502 fully opens the exhaust hole 501. When the guide rod 701 is located at the third wave trough 605, the baffle 502 fully closes the exhaust hole 501. When the guide rod 701 is located at the second wave trough 605, the baffle 502 partially covers the exhaust hole 501.

[0054] By setting at least two peaks 604 and three troughs 605, when the guide rod 701 is located at the second trough 605, the baffle 502 covers part of the exhaust hole 501 and is in contact with the outer plate 101. In this way, the exhaust speed can be changed, and the baffle 502 is kept in contact with the outer plate 101. This avoids the baffle 502 from shaking due to airflow.

[0055] Furthermore, as shown in the figure, three or more peaks 604 can be set, thereby enabling further adjustments to the ventilation area of ​​the exhaust vent 501.

[0056] Preferred, such as Figure 1 and Figure 2 , Figures 11-13 As shown, an elastic element 702 is sleeved on the rotating shaft 503, and the elastic element 702 always has the potential energy to make the baffle 502 move toward the outer side plate 101.

[0057] By incorporating the elastic element 702, on the one hand, when the guide rod 701 is located at the trough 605, the elastic element 702 ensures that the baffle 502 and the outer plate 101 fit tightly together. On the other hand, during the rotation of the guide rod 701, the elastic element 702 enables the guide rod 701 to fit tightly together with the wave structure 603, resulting in smooth rotation of the rotating shaft 503, avoiding vibration during rotation, and thus reducing unnecessary noise.

[0058] Further elastic element 702 is optional spring.

[0059] Preferred, such as Figures 1-4 As shown, a second bushing 602 is provided on the inner side plate 102, and the rotating shaft 503 extends through the second bushing 602 toward the interior for a predetermined length. The portion of the rotating shaft 503 within the predetermined length range is a drive section 5031, through which the user can rotate the rotating shaft 503.

[0060] By setting a second bushing 602 through which the rotating shaft 503 passes, the rotating shaft 503 is supported in the axial direction by two bushings with a large span, which improves the stability of the rotation of the rotating shaft 503.

[0061] Specifically, the first bushing 601 and the second bushing 602 are embedded in the foam duct of the volute 1. Positioning protrusions can be provided on the outer circumferential surfaces of the first bushing 601 and the second bushing 602 to prevent the two bushings from rotating.

[0062] Of course, the portion of the shaft 503 within the volute 1 does not interfere with the operation of the centrifugal fan 2. The radial outer periphery of the centrifugal fan 2 includes a space for airflow, which can be used to accommodate the shaft 503.

[0063] Preferably, a first motor is provided on the volute 1, and the first motor can drive the rotating shaft 503 to rotate via the drive section 5031.

[0064] By controlling the rotation of the shaft 503 with the first motor, manpower can be saved, especially avoiding the need for people to climb to heights.

[0065] Furthermore, the first motor is set as a stepper motor, which can rotate the shaft 503 more stably and smoothly.

[0066] Preferred, such as Figure 11 and Figure 14 As shown, a second motor 802 is provided on the outer side plate 101, and a connecting sleeve 801 is fixed on the output shaft of the second motor 802. The connecting sleeve 801 has a sliding groove 803 extending along the axial direction of the output shaft. A slider 804 is fixed on the rotating shaft 503. The rotating shaft 503 is inserted into the connecting sleeve 801, and the slider 804 is slidably engaged in the sliding groove 803.

[0067] The second motor 802 can drive the rotating shaft 503 to rotate via belt drive or gear drive. Preferably, in this application, it is connected to the rotating shaft 503 via a connecting sleeve 801. The second motor 802 is fixed on the outer plate 101, and a connecting sleeve 801 is provided. A sliding groove 803 is provided on the connecting sleeve 801. A slider 804 is fixed on the rotating shaft 503, and the slider 804 can slide within the sliding groove 803. Specifically, when the output shaft of the second motor 802 rotates, since the slider 804 is located within the sliding groove 803, the rotation of the output shaft drives the connecting sleeve 801 to rotate, which in turn drives the rotating shaft 503 to rotate. Due to the wave structure 603 and the elastic element 702, the guide rod 701 will slide along the wave structure 603. The sliding of the guide rod 701 along the wave structure 603 causes the rotating shaft 503 to slide in the axial direction. When the rotating shaft 503 slides in the axial direction, the slider 804 slides within the sliding groove 803. This allows the second motor 802 to be fixed on the outer plate 101 and drive the rotating shaft 503 to rotate. In other words, the slide groove 803 and the slider 804 can move axially relative to each other, but cannot rotate relative to each other, thus avoiding interference between the rotating shaft 503 and the connecting sleeve 801.

[0068] Preferred, such as Figure 11 and Figure 14 As shown, the baffle 502 is disposed outside the volute 1, and the elastic element 702 is disposed between the connecting sleeve 801 and the baffle 502 and is subjected to pressure.

[0069] The baffle 502 is disposed outside the volute 1, which can prevent the baffle 502 from interfering with the airflow inside the volute 1. The elastic element 702 is disposed between the connecting sleeve 801 and the baffle 502 and is under pressure. That is, it is disposed outside the volute 1, and compared with being disposed inside the volute 1, it will not interfere with the airflow inside the volute 1.

[0070] Preferred, such as Figure 15 and Figure 16 As shown, the air conditioner includes an outdoor unit, which includes an outdoor fan 3; an exhaust pipe 9 is provided between the exhaust hole 501 and the outdoor fan 3, the air inlet of the exhaust pipe 9 covers the exhaust hole 501, and the air outlet of the exhaust pipe 9 faces the air inlet side of the outdoor fan 3. When the outdoor fan 3 is working, a negative pressure is formed on the air inlet side.

[0071] The outdoor fan 3 generates negative pressure on the air inlet side, which in turn creates negative pressure on the air outlet of the exhaust pipe 9. This negative pressure draws air out of the exhaust pipe 9. In this way, on the one hand, it can accelerate the outflow of indoor air, and at the same exhaust speed, the size of the exhaust hole 501 can be smaller. On the other hand, when the indoor centrifugal fan 2 rotates at a slower speed or stops, the outdoor fan 3 can still draw out indoor air, avoiding the noise generated by the indoor centrifugal fan 2, which is beneficial to improving the user experience.

[0072] Furthermore, the outdoor fan 3 includes axial flow blades.

[0073] Preferred, such as Figure 15 and Figure 16 As shown, the outdoor unit includes a condenser, which is located on the air outlet side of the outdoor fan 3.

[0074] When the air conditioner is heating, the indoor air temperature is high, while the condenser temperature is low. The condenser needs to absorb heat. The high-temperature air flowing out of the room flows through exhaust duct 9 to the air intake side of the outdoor fan 3. Because the outdoor fan 3 creates negative pressure on the air intake side, the high-temperature air flows through the outdoor fan 3 to the condenser. The high-temperature air exchanges heat with the condenser, and the condenser absorbs the heat contained in the high-temperature air flowing out of the room, which helps to increase the condensation temperature inside the condenser, achieving heat recovery and improving the heating efficiency of the air conditioner. Similarly, when the air conditioner is cooling, the low-temperature air in the room flows through exhaust duct 9 to the condenser. The condenser absorbs the cold air contained in the room (heat exchange between the condenser and the low-temperature air in the room), which helps to lower the temperature of the refrigerant inside the condenser and improve the cooling efficiency of the air conditioner.

[0075] Based on indoor and outdoor air quality and user needs, the size of the exhaust vent 501's flow area is adjusted to control the outflow of air and thus the amount of fresh air entering. Specifically, for example, when indoor CO2 concentration is high, increasing the flow area of ​​the exhaust vent 501 results in faster indoor air exhaust and a higher indoor negative pressure (which will not cause discomfort to the human body), allowing fresh outdoor air to enter the room more quickly. When outdoor air quality is poor, reducing the ventilation area of ​​the exhaust vent 501 or closing it prevents polluted air from entering. While introducing fresh air, this avoids the additional cooling / heating load that might result from an excessively large exhaust vent 501, thus reducing the burden on the air conditioning system. Adjusting the size of the exhaust vent 501 as needed effectively reduces unnecessary energy loss. Connecting the exhaust outlet to the axial fan blades via the exhaust duct 9 improves both the exhaust from the volute 1 to the outside and the condenser's heat exchange efficiency, preventing energy waste.

[0076] Preferred, such as Figure 15 and Figure 16 As shown, the air conditioner is a window air conditioner or a wall-mounted air conditioner;

[0077] The air conditioner includes a chassis 4, and the outdoor unit and the volute 1 are both mounted on the chassis 4.

[0078] Window air conditioners or wall-mounted air conditioners are all integrated or modular air conditioners. This type of air conditioner has a relatively compact overall structure and occupies less space.

[0079] Preferably, when a rotating shaft 503 is provided, the portion of the rotating shaft 503 located inside the volute 1 includes a guide section 5032, and the cross-sectional shape of the guide section 5032 is flat.

[0080] When the baffle 502 completely closes the exhaust hole 501, the guide section 5032 can guide the airflow in the volute 1 to improve the stability of the airflow in the volute 1; when the baffle 502 completely opens the exhaust hole 501, the guide section 5032 can block the airflow in the volute 1 to change the direction of airflow, thereby accelerating the flow of air out of the exhaust hole 501 from the volute 1.

[0081] When the baffle 502 completely closes the air vent 501, the guide section 5032 can guide the airflow inside the volute 1 to improve the stability of the airflow within the volute 1. At this time, the flat guide section 5032 acts as a baffle, guiding the airflow and making the airflow smoother. When the baffle 502 completely opens the exhaust vent 501, the guide section 5032 can block the airflow inside the volute 1 to change the direction of airflow. At this time, the flat guide section 5032 plays a turbulence role. That is, the surface of the guide section 5032 extends radially, hindering the airflow and slowing down the airflow, thereby increasing the air pressure inside the volute 1 and accelerating the airflow out of the exhaust vent 501 from the volute 1.

[0082] When the second bushing 602 is provided, the part of the rotating shaft 503 located inside the volute 1 firstly plays the role of transmitting force, and further plays the role of guiding or obstructing the airflow.

[0083] Preferably, the guide section 5032 includes an arc-shaped plate, and when the baffle 502 completely closes the exhaust hole 501, the concave surface of the arc-shaped plate faces the center of the volute 1.

[0084] The concave surface of the arc-shaped plate faces the center of the volute 1, which means that when the baffle 502 closes the exhaust port 501, the arc-shaped plate forms a guide plate that is consistent with the airflow direction, further improving the flow stability of the airflow inside the volute 1.

[0085] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0086] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. An air conditioner comprising a centrifugal fan (2) for indoor air circulation, the centrifugal fan (2) being disposed within a volute (1), the centrifugal fan (2) being able to create a positive pressure zone within the volute (1) when operating, characterized in that, In the axial direction of the centrifugal fan (2), the volute (1) includes an outer side plate (101) and an inner side plate (102). The outer side plate (101) is closer to the outside than the inner side plate (102). An exhaust hole (501) is provided on the outer side plate (101). The exhaust hole (501) is located in the positive pressure zone and can lead to the outside. A baffle (502) is provided at the exhaust hole (501). The baffle (502) can rotate in a preset plane to change the size of the ventilation area of ​​the exhaust hole (501).

2. The air conditioner according to claim 1, characterized in that, The outer side plate (101) is provided with a first bushing (601), and the baffle (502) is provided with a rotating shaft (503). A portion of the rotating shaft (503) is rotatably disposed within the first bushing (601). One end of the first bushing (601) is provided with a wave structure (603), the wave structure (603) including at least one wave crest (604) and wave troughs (605) on both sides of the wave crest (604). A guide rod (70) is fixedly disposed on the rotating shaft (503). 1) During the rotation of the baffle (502) driven by the rotating shaft (503), the guide rod (701) slides along the wave structure (603). When the guide rod (701) is not located in the trough (605), the baffle (502) separates from the outer plate (101). When the guide rod (701) is located in the trough (605), the baffle (502) is in contact with the outer plate (101) and the exhaust hole (501) is fully opened or fully closed.

3. The air conditioner according to claim 2, characterized in that, The wave structure (603) includes at least two wave crests (604) and three wave troughs (605), the three wave troughs (605) being the first wave trough (605), the second wave trough (605), and the third wave trough (605) respectively. When the guide rod (701) is located in the first wave trough (605), the baffle (502) fully opens the exhaust hole (501). When the guide rod (701) is located in the third wave trough (605), the baffle (502) fully closes the exhaust hole (501). When the guide rod (701) is located in the second wave trough (605), the baffle (502) partially covers the exhaust hole (501).

4. The air conditioner according to claim 2, characterized in that, An elastic element (702) is sleeved on the rotating shaft (503), and the elastic element (702) always has the potential energy to make the baffle (502) move toward the outer side plate (101).

5. The air conditioner according to claim 2, characterized in that, A second bushing (602) is provided on the inner side plate (102). The rotating shaft (503) passes through the second bushing (602) and extends towards the interior for a predetermined length. The portion of the rotating shaft (503) within the predetermined length range is a drive section (5031). The user can rotate the rotating shaft (503) through the drive section (5031).

6. The air conditioner according to claim 5, characterized in that, The volute (1) is provided with a first motor, which can drive the rotating shaft (503) to rotate via the drive section (5031).

7. The air conditioner according to claim 4, characterized in that, A second motor (802) is provided on the outer side plate (101). A connecting sleeve (801) is fixed on the output shaft of the second motor (802). A groove (803) extending along the axial direction of the output shaft is provided on the connecting sleeve (801). A slider (804) is fixed on the rotating shaft (503). The rotating shaft (503) is inserted into the connecting sleeve (801), and the slider (804) is slidably engaged in the groove (803).

8. The air conditioner according to claim 7, characterized in that, The baffle (502) is disposed outside the volute (1), and the elastic element (702) is disposed between the connecting sleeve (801) and the baffle (502) and is subjected to pressure.

9. The air conditioner according to claim 1, characterized in that, The air conditioner includes an outdoor unit, which includes an outdoor fan (3); an exhaust pipe (9) is provided between the exhaust hole (501) and the outdoor fan (3), the air inlet of the exhaust pipe (9) covers the exhaust hole (501), the air outlet of the exhaust pipe (9) faces the air inlet side of the outdoor fan (3), and the outdoor fan (3) forms a negative pressure on the air inlet side when it is working.

10. The air conditioner according to claim 9, characterized in that, The outdoor unit includes a condenser, which is located on the air outlet side of the outdoor fan (3).

11. The air conditioner according to claim 9, characterized in that, The air conditioner is a window air conditioner or a wall-mounted air conditioner. The air conditioner includes a chassis (4), and the outdoor unit and the volute (1) are both mounted on the chassis (4).

12. The air conditioner according to any one of claims 1-11, characterized in that, When a rotating shaft (503) is provided, the portion of the rotating shaft (503) located inside the volute (1) includes a guide section (5032), and the cross-sectional shape of the guide section (5032) is flat. When the baffle (502) completely closes the exhaust hole (501), the guide section (5032) can guide the airflow in the volute (1) to improve the stability of the airflow in the volute (1); when the baffle (502) completely opens the exhaust hole (501), the guide section (5032) can block the airflow in the volute (1) to change the direction of airflow, thereby accelerating the airflow out of the exhaust hole (501) from the volute (1).

13. The air conditioner according to claim 12, characterized in that, The guide section (5032) includes an arc-shaped plate, and when the baffle (502) completely closes the exhaust hole (501), the concave surface of the arc-shaped plate faces the center of the volute (1).

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