Air conditioner

Abstract

The present invention discloses an air conditioner, wherein the air conditioner includes an air-conditioning indoor unit, a ventilation module and a ventilation pipe; an indoor fresh air duct is defined inside the air-conditioning indoor unit; the ventilation module is installed outdoors or in a wall, and the ventilation module includes a fresh air housing, a fan, a fresh air switch door and an exhaust switch door which are movably installed in the fresh air housing. A ventilation duct is defined inside the fresh air housing, the fan is installed in the ventilation duct, a ventilation opening communicating with the ventilation duct, a fresh air inlet communicating with the air inlet end of the ventilation duct and an exhaust outlet communicating with the air outlet end of the ventilation duct are formed on the fresh air housing. The fresh air switch door is used to open or close the fresh air inlet; the exhaust switch door is used to open or close the exhaust outlet; one end of the ventilation pipe is communicated with the ventilation opening, and the other end is communicated with the indoor fresh air duct. The ventilation module of the air conditioner of the present invention occupies less space, can introduce fresh air into the room and discharge the indoor dirty air, and has a large air volume and low noise at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and particularly to an air conditioner. Background Art

[0002] Currently, most air conditioners adopt the scheme of placing the fresh air module on the indoor side. For example, the fresh air module is integrated with the body of the indoor unit of the air conditioner, or an independent fresh air module is externally mounted indoors. If the scheme of integrating the fresh air module with the body of the indoor unit of the air conditioner is adopted, it is often restricted by the body size, so the volume of the fresh air module is restricted in many ways; if the scheme of externally mounting the fresh air module independently indoors is adopted, it will occupy additional space. At the same time, the above two schemes of placing the fresh air module on the indoor side also have the problem of high noise, and thus cannot meet the functional requirements of large air volume and low noise.

[0003] The above content is only used to assist in understanding the technical solution of the invention, and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main object of the present invention is to propose an air conditioner, aiming to solve the technical problem that the introduction of fresh air by the air conditioner cannot meet the requirements of large air volume and low noise.

[0005] To achieve the above object, the air conditioner proposed by the present invention includes an indoor unit of the air conditioner, a ventilation module and a ventilation pipe;

[0006] An indoor fresh air duct is defined inside the indoor unit of the air conditioner;

[0007] The ventilation module is installed outdoors or in the wall. The ventilation module includes a fresh air housing, a fan, a fresh air switch door and an exhaust switch door that are movably installed in the fresh air housing. An air duct is defined inside the fresh air housing. The fan is installed in the ventilation air duct. A ventilation port communicating with the ventilation air duct, a fresh air inlet communicating with the inlet end of the ventilation air duct, and an exhaust outlet communicating with the outlet end of the ventilation air duct are opened on the fresh air housing. The fresh air switch door is used to open or close the fresh air inlet; the exhaust switch door is used to open or close the exhaust outlet;

[0008] One end of the ventilation pipe is connected to the ventilation port, and the other end is connected to the indoor fresh air duct.

[0009] In one embodiment, the fresh air inlet and the exhaust outlet are selectively opened.

[0010] When the fresh air inlet is opened, the fan is used to drive the outdoor air flow to enter the ventilation air duct from the fresh air inlet, and blow towards the indoor fresh air duct through the ventilation port. The ventilation port is located downstream of the exhaust outlet;

[0011] When the exhaust air outlet is open, the fan is used to drive the indoor air flow to enter the ventilation duct through the air change port and be discharged from the exhaust air outlet, and the air change port is located upstream of the fresh air inlet.

[0012] In one embodiment, the ventilation duct defines a fan installation cavity, a bypass duct, and an air inlet duct.

[0013] The air inlet duct communicates the fresh air inlet with the air inlet end of the fan installation cavity, the bypass duct communicates the air change port and the air inlet end of the fan installation cavity, and the fresh air switch door is arranged at the gas flow port between the bypass duct and the air inlet duct so that either the bypass duct or the air inlet duct is conducted with the air inlet end of the fan installation cavity.

[0014] In one embodiment, the fresh air switch door is rotatably installed on the fresh air housing to rotate and switch the bypass duct or the air inlet duct to be conducted with the air inlet end of the fan installation cavity; and / or,

[0015] The fresh air housing includes a volute, and the ventilation duct is formed inside the volute. When the fresh air switch door closes the fresh air inlet, the fresh air switch door smoothly transitions with the wall surface of the volute.

[0016] In one embodiment, the ventilation duct further defines an air outlet duct, the air outlet duct communicates the air change port with the air outlet end of the fan installation cavity, the exhaust air outlet is communicated with the air outlet duct, and when the exhaust air switch door opens the exhaust air outlet, the exhaust air switch door is also used to block the air flow from flowing from the air outlet end of the fan installation cavity into the air change port.

[0017] In one embodiment, the exhaust air switch door is rotatably installed on the fresh air housing to rotate and open or close the exhaust air outlet; and / or,

[0018] The fresh air housing includes a volute, and the ventilation duct is formed inside the volute. When the exhaust air switch door closes the exhaust air outlet, the exhaust air switch door smoothly transitions with the wall surface of the volute.

[0019] In one embodiment, the fan is a centrifugal fan, and the air outlet duct and the air inlet duct are arranged along the axial direction of the centrifugal fan.

[0020] In one embodiment, the air conditioner further includes an air conditioner outdoor unit, the air conditioner outdoor unit includes an outdoor housing, and the ventilation module is installed on the outer side wall or inside the outdoor housing.

[0021] In one embodiment, the ventilation module is detachably connected to the outdoor housing.

[0022] In one embodiment, the ventilation module is installed at the outer end of the outdoor housing, and the air conditioner further includes a waterproof cover which covers the ventilation module from above.

[0023] In one embodiment, the indoor unit of the air conditioner includes an indoor housing which further defines a heat exchange air duct isolated from the indoor fresh air duct. A fresh air outlet communicating with the indoor fresh air duct is formed in the indoor housing, and a purification module is provided at the indoor fresh air duct or the fresh air outlet.

[0024] In one embodiment, the indoor unit of the air conditioner includes an indoor housing which defines a heat exchange air duct and the indoor fresh air duct. The heat exchange air duct and the indoor fresh air duct are independent of each other, or the heat exchange air duct and the indoor fresh air duct communicate with each other.

[0025] In the present invention, by installing the ventilation module outdoors or in the wall, compared with installing the ventilation module on the indoor side, it will not occupy extra indoor space or be limited by the body size of the indoor unit of the air conditioner. Thus, the size of the ventilation module can be enlarged, and further the air volume can be increased. At the same time, when the ventilation module is installed outdoors or in the wall, with the overall air volume unchanged, the motor speed of the fan can be reduced, so that the air duct noise indoors can be reduced or avoided under the condition of high air volume. In other words, with the overall noise unchanged, the air volume of the overall air duct is increased, thereby improving the air exchange efficiency and meeting the air exchange requirements. In addition, by providing a fresh air switch door to open or close the fresh air inlet and an exhaust switch door to open or close the exhaust outlet, and using an air exchange pipe to connect the air exchange port and the indoor fresh air duct, the switching between the fresh air mode and the sewage air mode of the ventilation module can be realized only through a single air exchange pipe and a single fan, saving one fan, with a simple structure, making the overall structure of the ventilation module more compact, occupying less space, and being easy to implement. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0027] Figure 1 It is a schematic structural diagram of an embodiment of the air conditioner of the present invention;

[0028] Figure 2 It is Figure 1 the assembly structural diagram of the outdoor unit of the air conditioner and the ventilation module in

[0029] Figure 3Schematic diagram of a structure of a ventilation module of an air conditioner according to an embodiment of the present invention;

[0030] Figure 4 is Figure 3 Schematic diagram of the structure of the ventilation module from another angle in

[0031] Figure 5 is Figure 3 Internal structure schematic diagram of the ventilation module in , where the ventilation module is in the fresh air mode;

[0032] Figure 6 is Figure 3 Internal structure schematic diagram of the ventilation module in , where the ventilation module is in the sewage air mode;

[0033] Figure 7 is Figure 3 Partial exploded structure schematic diagram of the ventilation module from one angle in .

[0034] Explanation of the reference numerals in the drawings:

[0035] Label Name Label Name Label Name 100 Air conditioner indoor unit 211d Air outlet duct 240 Exhaust switch door 200 Ventilation module 212 Ventilation opening 300 Ventilation pipe 210 Fresh air housing 213 Fresh air inlet 400 Air conditioner outdoor unit 211 Ventilation duct 214 Exhaust outlet 410 Outdoor housing 211a Fan installation cavity 215 Volute 500 Waterproof cover 211b Side ventilation duct 220 Fan 211c Air inlet duct 230 Fresh air switch door

[0036] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0037] It should be noted that if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where A and B are satisfied simultaneously.

[0038] The present invention provides an air conditioner.

[0039] In the embodiments of the present invention, as Figures 1 to 7As shown, the air conditioner includes an indoor unit 100 of the air conditioner, a ventilation module 200, and a ventilation pipe 300. An indoor fresh air duct is defined inside the indoor unit 100 of the air conditioner, and the ventilation module 200 is installed outdoors or in a wall. The ventilation module 200 includes a fresh air housing 210, a fan 220, a fresh air switch door 230 and an exhaust switch door 240 that are movably installed in the fresh air housing 210. A ventilation duct 211 is defined inside the fresh air housing 210. The fan 220 is installed in the ventilation duct 211. A ventilation port 212 communicating with the ventilation duct 211, a fresh air inlet 213 communicating with the inlet end of the ventilation duct 211, and an exhaust outlet 214 communicating with the outlet end of the ventilation duct 211 are provided on the fresh air housing 210. The fresh air switch door 230 is used to open or close the fresh air inlet 213; the exhaust switch door 240 is used to open or close the exhaust outlet 214. One end of the ventilation pipe 300 is connected to the ventilation port 212, and the other end is connected to the indoor fresh air duct.

[0040] In this embodiment, the indoor unit 100 of the air conditioner can be a wall-mounted indoor unit 100 of the air conditioner, a floor-standing indoor unit 100 of the air conditioner, etc. The indoor unit 100 of the air conditioner includes an indoor housing. A heat exchange duct and an indoor fresh air duct are defined inside the indoor housing. Then the indoor fresh air duct can be independent of the heat exchange duct or communicate with the heat exchange duct. In some embodiments, the indoor fresh air duct can also be made a part of the heat exchange duct, that is, fresh air is blown out into the room through the heat exchange duct 211. Then the fresh air can also be heated by using a heat exchanger. The ventilation module 200 can be specifically embedded in a wall, or hung on an outer wall, or installed on the outdoor unit 400 of the air conditioner. By installing the ventilation module 200 outdoors or in a wall, compared with installing the ventilation module 200 on the indoor side, it will not occupy extra indoor space or be restricted by the body size of the indoor unit 100 of the air conditioner. Thus, the size of the ventilation module 200 can be made larger, and then the air volume can be increased. At the same time, when the ventilation module 200 is installed outdoors or in a wall, with the overall air volume unchanged, the motor speed of the fan 220 can be reduced, so that the indoor duct noise can be reduced or avoided under the condition of high air volume. In other words, with the overall noise unchanged, the air volume of the overall duct is increased, and then the air change efficiency is improved to meet the air change requirements.

[0041] The air vent 212 and the air exchange pipe 300 are in sealed connection. Usually, the shape of the air vent 212 is circular. In order to facilitate pipe connection, a pipe joint can also be provided at the air vent 212. The shapes of the fresh air inlet 213 and the exhaust outlet 214 can be circular, or can be adaptively adjusted according to the shape of the fresh air housing 210, such as rectangular, original arc-shaped, etc. The fresh air switch and the fresh air inlet 213, and the exhaust switch door 240 and the exhaust outlet 214 are adapted in shape to open or close the corresponding openings. The fan 220 can specifically be a centrifugal fan 220 or a cross-flow fan 220. In order to increase the overall air volume, the fan 220 is preferably a centrifugal fan 220. It can be understood that when the fan 220 is installed in the air exchange duct 211, the air exchange duct 211 has an air inlet end and an air outlet end. The fresh air inlet 213 is communicated with the air inlet end of the air exchange duct 211, and the fan 220 drives the air flow to flow into the air exchange duct 211 from the fresh air inlet 213. The exhaust outlet 214 is communicated with the air outlet end of the air exchange duct 211, and the fan 220 drives the air flow in the air exchange duct 211 to be discharged to the outside through the exhaust outlet 214. The fresh air switch door 230 and the exhaust switch door 240 are movably installed on the fresh air housing 210. Then the fresh air switch door 230 and the exhaust switch door 240 can be rotatably connected to the fresh air housing 210 or slidably connected to the fresh air housing 210 to open or close the fresh air inlet 213 and the exhaust outlet 214 by rotation or sliding. The fresh air switch door 230 and the exhaust switch door 240 can be manually switched to open or close the fresh air inlet 213 and the exhaust outlet 214, or can be driven by a driving device, such as a driving motor, to open or close the fresh air inlet 213 and the exhaust outlet 214.

[0042] One end of the air exchange pipe 300 is communicated with the air exchange port 212, and the other end is communicated with the indoor fresh air duct, so that the air flow in the air exchange duct 211 of the fresh air housing 210 can be blown into the air exchange pipe 300 through the air exchange port 212, and then blown into the room through the indoor fresh air duct; it can also make the indoor air enter the air exchange pipe 300 from the indoor fresh air duct, and then be blown into the air exchange duct 211 of the fresh air housing 210 through the air exchange port 212. It can be understood that the fresh air switch door 230 and the exhaust switch door 240 are controlled separately. Usually, when the fresh air switch door 230 opens the fresh air inlet 213, the exhaust switch door 240 is controlled to close the exhaust outlet 214. The fan 220 drives the outdoor air flow to flow into the air exchange duct 211 from the fresh air inlet 213, and then flows into the indoor fresh air duct through the air exchange port 212 to be blown into the room, so as to provide fresh air for the room. When the new exhaust switch door 240 opens the exhaust outlet 214, the fresh air switch door 230 is controlled to close the fresh air inlet 213. The fan 220 drives the polluted air in the room to flow into the air exchange duct 211 through the indoor fresh air duct, the air exchange pipe 300 and the air exchange port 212, and then be discharged from the exhaust outlet 214 to realize indoor sewage discharge. In this way, only through a single air exchange pipe 300 and a single fan 220, the switching between the fresh air mode and the sewage discharge mode of the air exchange module 200 can be realized, saving a fan 220, with a simple structure, making the overall structure of the air exchange module 200 more compact, occupying less space, and being easy to implement. The heat exchange function of the air conditioner and the fresh air or sewage discharge function of the air exchange module 200 can be used simultaneously or independently. The free switching between the fresh air mode and the sewage discharge mode can be realized according to different usage scenarios to meet the diverse needs of users.

[0043] In the present invention, by installing the air exchange module 200 outdoors or in the wall, compared with installing the air exchange module 200 on the indoor side, it will not occupy additional indoor space or be restricted by the body size of the air conditioner indoor unit 100, so that the size of the air exchange module 200 can be made larger, and then the air volume can be increased. At the same time, when the air exchange module 200 is installed outdoors or in the wall, with the overall air volume unchanged, the motor speed of the fan 220 can be reduced, so that the noise of the indoor air exchange duct 211 can be reduced or avoided under the condition of high air volume. In other words, with the overall noise unchanged, the air volume of the overall air exchange duct 211 is increased, thereby improving the air exchange efficiency and meeting the air exchange requirements. In addition, by setting the fresh air switch door 230 to open or close the fresh air inlet 213, and the exhaust switch door 240 to open or close the exhaust outlet 214, and using the air exchange pipe 300 to connect the air exchange port 212 and the indoor fresh air duct, only through a single air exchange pipe 300 and a single fan 220, the switching between the fresh air mode and the sewage discharge mode of the air exchange module 200 can be realized, saving a fan 220, with a simple structure, making the overall structure of the air exchange module 200 more compact, occupying less space, and being easy to implement.

[0044] Specifically, please refer to Figures 3 to 7 , one of the fresh air inlet 213 and the exhaust air outlet 214 is opened. When the fresh air inlet 213 is opened, the fan 220 is used to drive the outdoor air flow to enter the ventilation duct 211 from the fresh air inlet 213, and blow towards the indoor fresh air duct through the ventilation port 212. The ventilation port 212 is located downstream of the exhaust air outlet 214. When the exhaust air outlet 214 is opened, the fan 220 is used to drive the indoor air flow to enter the ventilation duct 211 through the ventilation port 212, and be discharged from the exhaust air outlet 214. The ventilation port 212 is located upstream of the fresh air inlet 213.

[0045] In this embodiment, one of the fresh air inlet 213 and the exhaust air outlet 214 is opened. When the fresh air switch door 230 closes the fresh air inlet 213, the exhaust air switch door 240 opens the exhaust air outlet 214. When the fresh air switch door 230 opens the fresh air inlet 213, the exhaust air switch door 240 closes the exhaust air outlet 214. It can be understood that the air conditioner has a fresh air mode and a sewage exhaust air mode. When the air conditioner is in the fresh air mode, the fresh air switch door 230 opens the fresh air inlet 213, the exhaust air switch door 240 closes the exhaust air outlet 214, and the fan 220 drives the outdoor air flow to enter the ventilation duct 211 from the fresh air inlet 213, and blow towards the indoor fresh air duct through the ventilation port 212, and finally blows into the room to realize introducing fresh air into the room. On this flow path, the ventilation port 212 is located downstream of the exhaust air outlet 214. When the air conditioner is in the exhaust air mode, the exhaust air switch door 240 opens the exhaust air outlet 214, the fresh air switch door 230 closes the fresh air inlet 213, and the fan 220 drives the indoor air flow to enter the ventilation duct 211 through the ventilation port 212, and be discharged from the exhaust air outlet 214. On this flow path, the ventilation port 212 is located upstream of the fresh air inlet 213. In this way, the ventilation port 212 is specifically located between the exhaust air outlet 214 and the fresh air inlet 213, that is, between the air inlet end and the air outlet end of the ventilation duct 211. Then, the ventilation port 212 can supply fresh air when the fresh air inlet 213 is opened and the exhaust air outlet 214 is closed, and can also introduce indoor air when the fresh air inlet 213 is closed and the exhaust air outlet 214 is opened. Thus, the switching between the fresh air mode and the sewage exhaust air mode of the entire ventilation module 200 is smoother and easier to control.

[0046] In one embodiment, such as Figure 5 and Figure 6As shown, the ventilation air duct 211 defines a fan installation cavity 211a, a bypass air duct 211b, and an air inlet duct 211c. The air inlet duct 211c connects the fresh air inlet 213 to the air inlet end of the fan installation cavity 211a. The bypass air duct 211b connects the ventilation opening 212 and the air inlet end of the fan installation cavity 211a. The fresh air switch door 230 is arranged at the gas flow port between the bypass air duct 211b and the air inlet duct 211c, so that either the bypass air duct 211b or the air inlet duct 211c is conducted to the air inlet end of the fan installation cavity 211a.

[0047] In this embodiment, it can be understood that the ventilation air duct 211 is a complete flow channel, and the fan installation cavity 211a, the bypass air duct 211b, and the air inlet duct 211c are separated by the wall surface formed by the shape of the volute 215. The fan 220 is installed in the fan installation cavity 211a, and the air inlet duct 211c constitutes the air inlet end of the ventilation air duct 211 to connect the fresh air inlet 213 with the ventilation air duct 211 of the fan installation cavity 211a. By connecting the ventilation opening 212 with the air inlet end of the fan installation cavity 211a through the bypass air duct 211b, both the ventilation opening 212 and the fresh air inlet 213 are located at the air inlet end of the fan installation cavity 211a. Thus, when the fresh air switch door 230 opens the air inlet duct 211c and blocks the bypass air duct 211b, the air flow is introduced into the fan installation cavity 211a from the fresh air inlet 213. At this time, the ventilation opening 212 is still in communication with the air outlet end of the fan installation cavity 211a. When the fresh air switch door 230 closes the air inlet duct 211c and opens the bypass air duct 211b, the air flow is introduced into the fan installation cavity 211a from the ventilation opening 212. As a result, the ventilation module 200 can suck out the dirty air in the room and introduce the fresh air outside the room into the room. By arranging the fresh air switch door 230 at the gas flow port of the bypass air duct 211b and the air inlet duct 211c, when the fresh air switch door 230 opens the fresh air inlet 213, the bypass air duct 211b can be blocked simultaneously to prevent the air flow from entering the fan installation cavity 211a through the bypass air duct 211b. When the fresh air switch door 230 closes the fresh air inlet 213, that is, blocks the air inlet duct 211c, the bypass air duct 211b is opened simultaneously, enabling the air flow to enter the fan installation cavity 211a through the ventilation opening 212. By providing the bypass air duct 211b and switching the bypass air duct 211b and the air inlet duct 211c through the fresh air switch door 230, on the one hand, the structure is simpler and easier to control, and on the other hand, the flow channels of the ventilation opening 212 in the fresh air mode and the dirty air discharge mode are different, so that the entire ventilation module 200 can be switched more smoothly between the two modes without interference. In other embodiments, the fresh air switch door 230 can also be only used to open or close the fresh air inlet 213, and a bypass switch door is additionally provided to block or conduct the bypass air duct 211b. And when the bypass air duct 211b is blocked, the ventilation opening 212 should still be in communication with the air outlet end of the fresh air installation cavity. The bypass switch door and the fresh air switch door 230 are opened alternatively.

[0048] Based on the above embodiments, further, please refer again to Figure 5 and Figure 6, the fresh air switch door 230 is rotatably installed on the fresh air housing 210 to rotatably switch the communication between the bypass air duct 211b or the air inlet duct 211c and the air inlet end of the fan installation cavity 211a. Specifically, the fresh air switch door 230 can be rotatably installed on the fresh air housing 210 through a rotating shaft. The drive shaft of the drive motor can be connected to the fresh air switch door 230 to drive the fresh air switch door 230 to rotate, thereby realizing the switching of the communication between the bypass air duct 211b and the air inlet end of the installation cavity or the communication between the air inlet duct 211c and the air inlet end of the installation cavity. The rotatable installation of the fresh air switch door 230 on the fresh air housing 210 makes the switching method simpler and easier to implement.

[0049] Furthermore, as Figure 6 and Figure 7 shown, the fresh air housing 210 includes a volute 215. An air exchange duct 211 is formed inside the volute 215. When the fresh air switch door 230 closes the fresh air inlet 213, the fresh air switch door 230 has a smooth transition with the wall surface of the volute 215. When the fresh air switch door 230 closes the fresh air inlet 213, the air exchange module 200 is in the sewage air mode. Then, the air flow enters the air inlet end of the fan installation cavity 211a through the bypass air duct 211b from the air exchange port 212, and the fresh air inlet 213 is located upstream of the air exchange port 212. By making the fresh air switch door 230 have a smooth transition with the wall surface of the volute 215, the fresh air switch door 230 forms a part of the volute 215, so that the air flow is smoother when flowing through the bypass air duct 211b, with less air resistance, thereby effectively reducing noise and increasing the air volume.

[0050] In an embodiment, please refer to Figure 5 and Figure 6, the ventilation air duct 211 further defines an air outlet duct 211d. The air outlet duct 211d communicates the air outlet 212 with the air outlet end of the fan installation cavity 211a. The exhaust air outlet 214 communicates with the air outlet duct 211d. And when the exhaust air switch door 240 opens the exhaust air outlet 214, the exhaust air switch door 240 also serves to block the airflow from flowing from the air outlet end of the fan installation cavity 211a into the air inlet 212. When the exhaust air switch door 240 opens the exhaust air outlet 214, the ventilation module 200 is in the sewage exhaust air mode. At this time, the fresh air inlet 213 is closed, the fresh air switch door 230 opens the bypass air duct 211b, and at the same time, the exhaust air switch door 240 blocks the airflow from flowing from the air outlet cavity of the fan installation cavity 211a into the air inlet 212. Thus, the airflow can only flow from the air inlet 212 through the bypass air duct 211b into the fresh air installation cavity and is only blown out from the exhaust air outlet 214, effectively preventing the phenomenon of air return. When the ventilation module 200 is in the fresh air mode, the exhaust air switch door 240 closes the exhaust air outlet 214. At this time, the air inlet 212 communicates with the air outlet end of the fan installation cavity 211a, the fresh air switch door 230 opens the fresh air inlet 213, and the bypass air duct 211b is blocked. Then the airflow only enters the fan installation cavity 211a from the fresh air inlet 213 and only flows out from the air inlet 212. By providing the bypass air duct 211b, the air inlet 212 is simultaneously communicated with the air outlet duct 211d, and the exhaust air switch door 240 blocks the airflow from flowing from the air outlet end of the fan installation cavity 211a into the air inlet 212. On the one hand, the structure is simpler and easier to control. On the other hand, the flow channels of the air inlet 212 in the fresh air mode and the sewage exhaust air mode are different, so that the entire ventilation module 200 switches more smoothly between the two modes without interference with each other, effectively reducing or avoiding the phenomenon of air return. In other embodiments, another switch door can be additionally provided to block the airflow from the air outlet end of the fan installation cavity 211a from flowing into the air inlet 212 when the exhaust air outlet 214 is opened.

[0051] In one embodiment, as Figure 5 and Figure 6 shown, the exhaust air switch door 240 is rotatably installed on the fresh air housing 210 to rotate and open or close the exhaust air outlet 214. The exhaust air switch door 240 can be specifically rotatably installed on the fresh air housing 210 through a rotating shaft. The driving shaft of the driving motor can be connected to the exhaust air switch door 240 to drive the exhaust air switch door 240 to rotate, thereby realizing opening or closing the exhaust air outlet 214. The exhaust air switch door 240 is rotatably installed on the fresh air housing 210, so that the switching method is simpler and easier to implement.

[0052] Further, please refer to Figure 5, the fresh air housing 210 includes a volute 215. An air exchange duct 211 is formed inside the volute 215. When the exhaust switch door 240 closes the exhaust outlet 214, the exhaust switch door 240 smoothly transitions with the wall surface of the volute 215. When the exhaust switch door 240 closes the exhaust outlet 214, the air exchange module 200 is in the fresh air mode. Then, the air flow enters the air inlet end of the fan installation cavity 211a through the air inlet duct 211c from the fresh air inlet 213 and flows out to the room through the air exchange port 212, and the air exchange port 212 is located downstream of the exhaust outlet 214. By smoothly transitioning the exhaust switch door 240 with the wall surface of the volute 215, the exhaust switch door 240 forms a part of the volute 215, which makes the air flow more smooth when flowing through the air outlet duct 211d, with less air resistance, thereby effectively reducing noise and increasing the air volume.

[0053] In practical applications, such as Figures 3 to 7 shown, the fan 220 is a centrifugal fan 220, and the air outlet duct 211d and the air inlet duct 211c are arranged along the axial direction of the centrifugal fan 220. The centrifugal fan 220 has a large air volume and low noise, and can effectively achieve air intake and exhaust. The centrifugal fan 220 has axial air intake and radial air outlet, so that the air inlet duct 211c is located axially in the fan installation cavity 211a, and the air outlet duct 211d is located radially in the fan installation cavity 211a, and the air inlet duct 211c and the air outlet duct 211d are stacked and distributed axially on the centrifugal fan 220. This structure can make full use of the space in the thickness direction, thus avoiding the excessive size of the entire air exchange module 200 in a certain dimension, and then making the structure of the entire air exchange module 200 more compact, the whole more compact, and occupying less space.

[0054] In one embodiment, please refer to Figure 1 and Figure 2 , the air conditioner further includes an outdoor unit 400 of the air conditioner. The outdoor unit 400 of the air conditioner includes an outdoor housing 410, and the air exchange module 200 is installed on the outer side wall of the outdoor housing 410 or inside the outdoor housing 410. By installing the air exchange module 200 on the outdoor unit 400 of the air conditioner, compared with installing the air exchange module 200 on the outer side of the wall or embedded in the wall, there is no need to drill another hole in the wall for installing the air exchange module 200, thus reducing the installation difficulty. The air exchange pipe 300 can be drilled separately or share the same hole with the connecting pipe between the outdoor unit 400 of the air conditioner and the indoor unit 100 of the air conditioner. And by installing the air exchange module 200 outside or inside the outdoor housing 410, the air exchange module 200 is integrally arranged with the outdoor unit 400 of the air conditioner, so that the installation of the air exchange module 200 can be realized simultaneously when installing the outdoor unit 400 of the air conditioner, simplifying the installation steps. By installing the air exchange module 200 inside the outdoor housing 410, the purposes of waterproofing, sunscreen and anti-aging can be achieved, thereby extending the service life of the air exchange module 200.

[0055] Furthermore, the ventilation module 200 is detachably connected to the outdoor housing 410. The connection manner between the ventilation module 200 and the outdoor housing 410 can be one or more of screw connection, snap connection, magnetic attraction connection, and sliding groove and slide rail connection. By making the ventilation module 200 and the outdoor housing 410 detachably connected, it is convenient to replace and repair the ventilation module 200.

[0056] In one embodiment, as Figure 1 and Figure 2 shown, the ventilation module 200 is installed at the outer end of the outdoor housing 410. The air conditioner further includes a waterproof cover 500, and the waterproof cover 500 covers the upper part of the ventilation module 200. By installing the ventilation module 200 on the outside of the outdoor housing 410, when manufacturing the outdoor housing 410, there is no need to modify the original mold of the outdoor housing 410, which can save the overall manufacturing cost. By installing the ventilation module 200 at the side end of the outdoor housing 410, compared with installing it on the top or other positions of the outdoor housing 410, the obtrusiveness can be reduced, so that the ventilation module 200 is integrated with the air conditioner outdoor unit 400. In addition, by covering the ventilation module 200 with the waterproof cover 500, the waterproof function can be achieved for the ventilation module 200 to prevent rainwater and the like from affecting the function of the ventilation module 200. The waterproof cover 500 can also play a sunscreen role, thereby preventing the ventilation module 200 from aging and improving the service life of the ventilation module 200. In other embodiments, the ventilation module 200 can also be installed on the top or other positions of the outdoor housing 410.

[0057] In one embodiment, the air conditioner indoor unit 100 includes an indoor housing. The indoor housing further defines a heat exchange air duct isolated from the indoor fresh air duct. A fresh air outlet communicating with the indoor fresh air duct is provided on the indoor housing. A purification module is provided at the indoor fresh air duct or the fresh air outlet. The purification module can specifically include a filtering module, such as a HEPA filter screen, etc. The purification module can also include a negative ion module, an electrostatic dust removal module, etc. By providing the purification module at the indoor fresh air duct or the fresh air outlet, the fresh air blown into the indoor fresh air duct from the ventilation module 200 can be purified and then enter the room, thereby preventing the fresh air from polluting the indoor air, improving the fresh air quality, and enhancing the user experience. In other embodiments, the purification module can also be provided at the air exchange pipe 300 or the air exchange opening 212.

[0058] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An air conditioner, characterized in that, Comprising: An air conditioner indoor unit, an indoor fresh air duct being defined inside the air conditioner indoor unit; A ventilation module, installed outdoors or inside a wall, the ventilation module including a fresh air housing, a fan, a fresh air switch door and an exhaust switch door movably installed in the fresh air housing, a ventilation duct being defined inside the fresh air housing, the fan being installed in the ventilation duct, a ventilation opening communicating with the ventilation duct, a fresh air inlet communicating with the air inlet end of the ventilation duct, and an exhaust outlet communicating with the air outlet end of the ventilation duct being formed on the fresh air housing, the fresh air switch door being used to open or close the fresh air inlet; the exhaust switch door being used to open or close the exhaust outlet; And A ventilation pipe, one end of which is communicated with the ventilation opening and the other end of which is communicated with the indoor fresh air duct; When the fresh air inlet is opened, the fan is used to drive outdoor air to enter the ventilation duct from the fresh air inlet and blow towards the indoor fresh air duct through the ventilation opening, the ventilation opening being located downstream of the exhaust outlet; When the exhaust outlet is opened, the fan is used to drive indoor air to enter the ventilation duct through the ventilation opening and be discharged from the exhaust outlet, the ventilation opening being located upstream of the fresh air inlet; A driving device, which can control the fresh air switch door to open or close the fresh air inlet and control the exhaust switch door to open or close the exhaust outlet.

2. The air conditioner according to claim 1, characterized in that, The fresh air inlet and the exhaust outlet are alternately opened.

3. The air conditioner according to claim 2, characterized in that The ventilation duct defines a fan installation cavity, a bypass duct and an air inlet duct, The air inlet duct communicates the fresh air inlet with the air inlet end of the fan installation cavity, the bypass duct communicates the ventilation opening and the air inlet end of the fan installation cavity, and the fresh air switch door is arranged at the gas flow port between the bypass duct and the air inlet duct so that the bypass duct and the air inlet duct are alternately communicated with the air inlet end of the fan installation cavity.

4. The air conditioner according to claim 3, characterized in that, The fresh air switch door is rotatably installed on the fresh air housing to rotatably switch the bypass duct or the air inlet duct to be communicated with the air inlet end of the fan installation cavity; and / or, The fresh air housing includes a volute housing, the ventilation duct being formed inside the volute housing, and when the fresh air switch door closes the fresh air inlet, the fresh air switch door is smoothly transitioned with the wall surface of the volute housing.

5. The air conditioner according to claim 3, characterized in that, The ventilation duct further defines an air outlet duct, the air outlet duct communicating the ventilation opening with the air outlet end of the fan installation cavity, the exhaust outlet being communicated with the air outlet duct, and when the exhaust switch door opens the exhaust outlet, the exhaust switch door is further used to block the air flow from flowing into the ventilation opening from the air outlet end of the fan installation cavity.

6. The air conditioner according to claim 5, characterized in that The exhaust switch door is rotatably installed on the fresh air housing to rotatably open or close the exhaust outlet; and / or, The fresh air housing includes a volute housing, the ventilation duct being formed inside the volute housing, and when the exhaust switch door closes the exhaust outlet, the exhaust switch door is smoothly transitioned with the wall surface of the volute housing.

7. The air conditioner according to claim 5, characterized in that The fan is a centrifugal fan, and the air outlet duct and the air inlet duct are arranged along the axial direction of the centrifugal fan.

8. The air conditioner according to any one of claims 1 to 7, characterized in that, The air conditioner further includes an outdoor unit of the air conditioner, and the outdoor unit of the air conditioner includes an outdoor housing, and the ventilation module is installed on an outer side wall or inside the outdoor housing.

9. The air conditioner according to claim 8, characterized in that, The ventilation module is detachably connected to the outdoor housing.

10. The air conditioner according to claim 8, characterized in that, The ventilation module is installed at an outer end of the outdoor housing, and the air conditioner further includes a waterproof cover, and the waterproof cover covers above the ventilation module.

11. The air conditioner according to any one of claims 1 to 7, characterized in that, The indoor unit of the air conditioner includes an indoor housing, and the indoor housing further defines a heat exchange air duct isolated from the indoor fresh air duct, and a fresh air outlet communicating with the indoor fresh air duct is formed in the indoor housing, and a purification module is provided at the indoor fresh air duct or the fresh air outlet.

12. The air conditioner according to any one of claims 1 to 7, characterized in that, The indoor unit of the air conditioner includes an indoor housing, and the indoor housing defines a heat exchange air duct and the indoor fresh air duct, and the heat exchange air duct is independent of the indoor fresh air duct, or the heat exchange air duct communicates with the indoor fresh air duct.

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