Fresh air device and air conditioning cabinet having the same

Abstract

The present invention provides a fresh air device and an air conditioning cabinet equipped with the same, which relates to the technical field of air conditioners and aims to solve the problem that the existing fresh air device has large wind resistance during the exhaust process, resulting in poor exhaust. The fresh air device includes a shell, a fan assembly and a first valve. The shell is provided with an exhaust channel, a first air outlet and a second air outlet. The first air outlet is connected to the outdoors, and the second air outlet is connected to the indoors. The fan assembly is arranged in the inner cavity of the shell, and the fan assembly has an air inlet side and an air outlet side. In the exhaust mode of the fresh air device, the second air outlet is connected to the air inlet side, and the air outlet side is connected to the first air outlet through the exhaust channel and the first valve. The first valve is provided with a first guide surface, and the first guide surface is used to guide the airflow from the exhaust channel to the first air outlet. The present invention reduces the resistance during the exhaust process of the fresh air device and ensures smooth exhaust.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a fresh air device and an air conditioner cabinet having the same. Background Art

[0002] Currently, some air conditioners are equipped with fresh air devices to supply fresh air to the room, reducing air turbidity and improving the user experience. Furthermore, some fresh air devices are equipped with exhaust ducts to exhaust indoor air to the outside, thereby preventing excessive carbon dioxide concentrations from causing reduced comfort. However, existing fresh air devices have high wind resistance during the exhaust process, resulting in poor exhaust flow. Summary of the Invention

[0003] The first object of the present invention is to provide a fresh air device to solve the technical problem that the existing fresh air device has large wind resistance during the exhaust process, resulting in unsmooth exhaust.

[0004] The fresh air device provided by the present invention includes a shell, a fan assembly and a first valve, the shell is provided with an exhaust channel, a first air outlet and a second air outlet, the first air outlet is connected to the outdoors, and the second air outlet is connected to the indoors; the fan assembly is arranged in the inner cavity of the shell, and the fan assembly has an air inlet side and an air outlet side; in the exhaust mode of the fresh air device, the second air outlet is connected to the air inlet side, and the air outlet side is connected to the first air outlet through the exhaust channel and the first valve; the first valve is provided with a first guide surface, and the first guide surface is used to guide the airflow from the exhaust channel to the first air outlet.

[0005] When the fresh air device is needed to exhaust indoor air to the outdoors, the second air vent provided in the housing is connected to the air inlet side of the fan assembly, and the air outlet side of the fan assembly is connected to the first air vent via the exhaust duct and the first valve. The first valve is configured to guide airflow from the exhaust duct to the first guide surface of the first air vent. Starting the fan assembly creates a negative pressure on the air inlet side of the fan assembly, causing the indoor air to flow through the second air vent to the air inlet side and out through the air outlet side. Thereafter, the indoor air enters the exhaust duct and, under the guidance of the first guide surface, flows to the first air vent, achieving the purpose of exhausting air to the outdoors.

[0006] The fresh air device guides the airflow from the exhaust channel to the first air outlet by setting a first guide surface on the first valve connecting the exhaust channel and the first air outlet, optimizes the flow path of the airflow, thereby reducing the resistance of the airflow during the flow, allowing indoor air to be discharged to the outside more smoothly, ensuring the smoothness of exhaust, and reducing noise during the exhaust process.

[0007] In addition, by arranging the first guide surface on the first valve, the tedious step of machining the first guide surface in the internal space of the shell is eliminated, the machining difficulty of the first guide surface is reduced, and the machining of the first guide surface is facilitated.

[0008] Furthermore, the first valve is movably connected to the housing, and the housing is also provided with an air inlet channel. In the fresh air mode of the fresh air device, the first air outlet is connected to the air inlet side via the first valve and the air inlet channel, and the air outlet side is connected to the second air outlet. The first guide surface is used to guide airflow from the first air outlet to the air inlet channel. This arrangement ensures that even after the first valve switches the fresh air device to the fresh air mode, the first guide surface provided on the first valve can still be used to guide the air intake process, thereby optimizing the airflow path during the air intake process, reducing the flow resistance of the airflow from the first air outlet to the air inlet channel, and reducing noise during the air intake process.

[0009] Furthermore, the air inlet channel is provided with a guide slope, which is opposite to and spaced from the air inlet side. In the fresh air mode, the guide slope and the first guide surface are provided on either side of the first air outlet, wherein, along the flow direction of the airflow from the first air outlet to the air inlet side, the guide slope extends obliquely toward the air inlet side. The provision of the guide slope ensures that the moment outdoor air enters the housing from the first air outlet, it is simultaneously guided by the first guide surface and the guide slope, forming a path between the first guide surface and the guide slope that facilitates the entry of outdoor air. This not only reduces resistance during the air intake process and ensures smooth air intake, but also reduces noise during the air intake process.

[0010] Furthermore, the angle between the guide slope and the axis of the first air outlet is α, where 100°≤α≤120°. This configuration avoids the situation where the guide effect is not obvious due to the angle between the guide slope and the axis of the first air outlet being too small. On the other hand, it also avoids the situation where the space of the air inlet channel is compressed due to the angle between the guide slope and the axis of the first air outlet being too large, thereby reducing the air intake volume.

[0011] Furthermore, the housing is further provided with a transition section. In the exhaust mode, the air outlet side is connected to the exhaust duct via the transition section. The transition section is provided with a second guide surface, which is used to guide airflow from the air outlet side to the exhaust duct. By providing the second guide surface in the transition section, the airflow discharged from the air outlet side can be guided to the exhaust duct via the second guide surface, thereby ensuring smooth flow of air from the air outlet side to the exhaust duct.

[0012] Furthermore, the transition section extends in a direction substantially parallel to the instantaneous airflow direction on the outlet side, the exhaust duct is arranged at an angle to the transition section, the second guide surface is opposite the inlet of the exhaust duct, and along the flow direction of the airflow in the transition section, the second guide surface extends obliquely toward the exhaust duct. When the airflow reaches the position of the second guide surface, it flows along the inclined second guide surface and is guided into the exhaust duct by the second guide surface, thereby achieving the purpose of the second guide surface guiding the airflow, allowing the airflow in the transition section to smoothly enter the exhaust duct.

[0013] Furthermore, the second guide surface is a concave arc surface. This configuration allows the airflow to flow from the air outlet side to the exhaust channel. When the airflow flows along the second guide surface, the airflow direction at each position of the second guide surface is along the tangent direction of the second guide surface, and the tangent direction gradually approaches the exhaust channel, so that the airflow flowing through the second guide surface can be effectively guided to the exhaust channel, further improving the smoothness of the exhaust process.

[0014] Furthermore, the arc radius of the second guide surface is a, where 60mm≤a≤80mm; by limiting the arc radius of the second guide surface to the above range, on the one hand, the situation in which vortices are generated on the second guide surface due to an excessively small arc radius of the second guide surface is avoided, thereby ensuring exhaust efficiency; on the other hand, the situation in which the diversion effect is reduced due to an excessively large arc radius of the second guide surface is avoided. And / or, the central angle corresponding to the second guide surface is β, where 45°≤β≤60°; by limiting the central angle corresponding to the second guide surface to the above range, on the one hand, the situation in which the second guide surface is too short due to an excessively small central angle, thereby failing to achieve a diversion effect, is avoided; on the other hand, the situation in which the second guide surface is too long due to an excessively large central angle, thereby excessively occupying the transition section space, is avoided.

[0015] Furthermore, a transition guide surface is provided between the transition section and the exhaust duct. Along the direction of airflow in the exhaust duct, the transition guide surface extends obliquely toward the axis of the exhaust duct. This arrangement guides the airflow from the transition section to the exhaust duct, reducing resistance to airflow into the exhaust duct and further improving exhaust smoothness.

[0016] Furthermore, the fresh air device further includes a second valve movably connected to the housing. In the exhaust mode, the second valve connects the air outlet side with the exhaust passage, thereby forming the transition section between the air outlet side and the exhaust passage. In the fresh air mode, the second valve connects the air outlet side with the second air outlet. The second guide surface is formed on the second valve. This configuration of providing the second guide surface on the second valve eliminates the need for machining inside the housing, thereby reducing manufacturing costs.

[0017] Furthermore, the second valve includes a connected valve body and a blocking member. The blocking member is opposite the inlet of the exhaust passage, and an escape gap is defined between the blocking member and the valve body along the flow direction of air in the transition section. The second guide surface is formed on the blocking member. In the fresh air mode, the blocking member is inserted into the exhaust passage, and a portion of the exhaust passage wall is inserted into the escape gap. This arrangement ensures effective sealing of the exhaust passage while also preventing motion interference.

[0018] Furthermore, the first guide surface is a concave arc surface. This arrangement enables, in exhaust mode, when the airflow flows along the first guide surface, the flow direction of the airflow at each position on the first guide surface is along the tangent direction of the first guide surface, and the tangent direction gradually approaches the first air outlet, so that the airflow flowing through the first guide surface can be effectively guided to the first air outlet; while in fresh air mode, the above arrangement enables, when the airflow flows along the first guide surface, the flow direction of the airflow at each position on the first guide surface is also along the tangent direction of the first guide surface, and the tangent direction gradually approaches the air inlet channel, so that the airflow flowing through the first guide surface can be effectively guided to the air inlet channel, thereby ensuring the air intake volume.

[0019] Furthermore, the first valve includes a connected valve plate and a connecting piece. In the exhaust mode, the side of the valve plate facing the exhaust channel forms the first guide surface, and the connecting piece is rotatably connected to the shell. The transmission structure of this arrangement is simple, and it also reduces the sliding resistance during the sliding process, which is beneficial to improving the operating efficiency of the first valve. Moreover, in the fresh air mode, even if the other valves are not sealed tightly, the wind pressure generated on the outlet side of the fan assembly acts on the outside of the valve plate, or, in the exhaust mode, the negative pressure on the inlet side of the fan acts on the valve plate, so that the radial inner pressure of the valve plate is greater than the outer pressure, and the pressure difference acts on the valve plate. The load acting on the valve plate is all radially inward or outward through the connecting piece, and no torque is generated. The motor is only responsible for driving the first valve to rotate to the corresponding position, and there is no need to resist the load generated by the air pressure difference, which is beneficial to reducing the load on the motor.

[0020] Furthermore, the valve plate is an arc-shaped plate, and its thickness is b, where 2mm≤b≤4mm. This configuration not only helps ensure sufficient rigidity of the valve plate, but also reduces material waste. And / or, the central angle of the valve plate is γ, where 35°≤γ≤50°. This configuration of the central angle of the valve plate helps minimize significant energy loss when the airflow enters and exits the first guide surface, and minimizes significant energy loss when moving along the first guide surface, thereby reducing airflow obstruction. And / or, the angle through which the first valve rotates when switching between the fresh air mode and the exhaust mode is Ω, where 100°≤Ω≤110°. This selection of the angle through which the first valve rotates when switching between the fresh air mode and the exhaust mode not only helps ensure that the layout of the air inlet and exhaust channels fully avoids the filter assembly, thereby preventing the filter assembly from being compressed and causing excessive airflow resistance, but also helps minimize the angular change of the airflow in the area where the first valve is located, thereby reducing airflow energy waste.

[0021] Furthermore, in the fresh air mode, the angle between the line connecting the two ends of the first guide surface along its arc and the axis of the first air outlet is θ, where 30°≤θ≤35°. This configuration effectively changes the angle of the fresh air flow from the first air outlet, ensuring that the fresh air flow has a velocity toward the filter assembly after passing through the first guide surface. Furthermore, it prevents the valve plate from being too long and covering part of the filter assembly, thereby reducing filter assembly utilization, or prevents the air flow from flowing back to the edge of the filter assembly after passing through the valve plate and changing direction, thereby wasting airflow energy.

[0022] The second object of the present invention is to provide an air-conditioning cabinet to solve the technical problem of the existing air-conditioning cabinet having a fresh air device that does not exhaust air smoothly.

[0023] The air-conditioning cabinet provided by the present invention includes a body and the above-mentioned fresh air device, the body has a heat exchange module, the body is provided with a accommodating cavity, the accommodating cavity is located below the heat exchange module, the fresh air device is installed in the accommodating cavity, and the first air outlet is facing the rear of the air-conditioning cabinet; the axis of the fan assembly is horizontally arranged, the air inlet side is opposite to the rear of the air-conditioning cabinet, and the air outlet side is facing upward.

[0024] By arranging the above-mentioned fresh air device in the air-conditioning cabinet and installing the fresh air device in the accommodating cavity opened in the body, the air-conditioning cabinet has the function of using the fresh air device. Moreover, by arranging the first guide surface on the first valve between the exhaust channel and the first air outlet of the fresh air device, the guidance of the airflow during the exhaust process is also achieved, thereby ensuring the smoothness of the indoor air exhaust to the outside through the air-conditioning cabinet and reducing the noise during the exhaust process.

[0025] In addition, by setting the axis of the fan assembly horizontally and making the air inlet side of the fan assembly opposite to the rear of the air-conditioning cabinet, the first air outlet and the air inlet side of the fan assembly are in relative positions in the accommodating cavity, thereby shortening the flow path of the external air from the first air outlet to the air inlet side in the fresh air mode, which is beneficial to improving the smoothness of the air intake. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0027] Figure 1 A cross-sectional view of the structure of the fresh air device in exhaust mode provided in Example 1 of the present invention Figure 1 ;

[0028] Figure 2 A cross-sectional view of the structure of the fresh air device in exhaust mode provided in Example 1 of the present invention Figure 2 ;

[0029] Figure 3 A structural cross-sectional view of the fresh air device provided in the first embodiment of the present invention in the fresh air mode;

[0030] Figure 4 A side cross-sectional view of the fresh air device provided in the first embodiment of the present invention in the exhaust mode;

[0031] Figure 5 for Figure 4 A magnified view of the local structure at point A;

[0032] Figure 6 A structural cross-sectional view of a first valve of a fresh air device provided in Example 1 of the present invention;

[0033] Figure 7 A structural cross-sectional view of the fresh air device provided in the second embodiment of the present invention in exhaust mode and in an installed state;

[0034] Figure 8 A side cross-sectional view of the fresh air device provided in the third embodiment of the present invention in the exhaust mode;

[0035] Figure 9 A structural cross-sectional view of a first valve of a fresh air device provided in Example 3 of the present invention;

[0036] Figure 10 This is a schematic diagram of the main structure of the air-conditioning cabinet provided in Example 4 of the present invention.

[0037] Description of reference numerals:

[0038] 010-Fresh air device; 020-Machine body; 021-Heat exchange module; 030-Fresh air duct; 040-Wall; 100-Casing; 200-Fan assembly; 300-First valve; 400-Second valve; 500-Filter assembly; 110-Exhaust channel; 120-First air outlet; 130-Second air outlet; 140-Air inlet channel; 150-Transition section; 160-Transition guide surface; 170-Partition; 171-Exhaust outlet; 172-Air inlet; 180-Air guide cavity; 190-Guide slope; 210-Air inlet side; 220-Air outlet side; 310-Valve plate; 320-Connector; 311-First guide surface; 410-Valve body; 420-Sealing part; 430-Avoidance gap; 421-Second guide surface. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] Example 1

[0041] Figure 1 A cross-sectional view of the structure of the fresh air device 010 provided in this embodiment in the exhaust mode Figure 1 , Figure 2 A cross-sectional view of the structure of the fresh air device 010 provided in this embodiment in the exhaust mode Figure 2 .like Figure 1 and Figure 2 As shown, this embodiment provides a fresh air device 010, including a housing 100, a fan assembly 200, and a first valve 300. Specifically, the housing 100 is provided with an exhaust passage 110, a first air outlet 120, and a second air outlet 130. The first air outlet 120 is connected to the outside, and the second air outlet 130 is connected to the inside. The fan assembly 200 is disposed in the inner cavity of the housing 100 and has an air inlet side 210 and an air outlet side 220. In the exhaust mode of the fresh air device 010, the second air outlet 130 is connected to the air inlet side 210, and the air outlet side 220 is connected to the first air outlet 120 via the exhaust passage 110 and the first valve 300. The first valve 300 is provided with a first guide surface 311, which is used to guide airflow from the exhaust passage 110 to the first air outlet 120.

[0042] When the fresh air device 010 is used to exhaust indoor air to the outdoors, the second air vent 130 provided in the housing 100 is connected to the air inlet side 210 of the fan assembly 200, and the air outlet side 220 of the fan assembly 200 is connected to the first air vent 120 via the exhaust passage 110 and the first valve 300. The first valve 300 is configured to guide airflow from the exhaust passage 110 to the first guide surface 311 of the first air vent 120. Starting the fan assembly 200 generates a negative pressure on the air inlet side 210 of the fan assembly 200, causing the indoor air to flow through the second air vent 130 to the air inlet side 210 and out through the air outlet side 220. Thereafter, the indoor air enters the exhaust passage 110 and, under the guidance of the first guide surface 311, flows to the first air vent 120, achieving the purpose of exhausting the air outdoors.

[0043] The fresh air device 010 sets a first guide surface 311 on the first valve 300 connecting the exhaust channel 110 and the first air outlet 120, thereby guiding the airflow from the exhaust channel 110 to the first air outlet 120, optimizing the flow path of the airflow, thereby reducing the resistance of the airflow during the flow, allowing indoor air to be discharged to the outside more smoothly, ensuring the smoothness of exhaust, and reducing noise during the exhaust process.

[0044] In addition, by setting the first guide surface 311 on the first valve 300, the tedious step of processing the first guide surface 311 in the internal space of the shell 100 is eliminated, the processing difficulty of the first guide surface 311 is reduced, and the processing of the first guide surface 311 is facilitated.

[0045] Figure 3 This is a cross-sectional view of the structure of the fresh air device 010 provided in this embodiment in the fresh air mode. Figure 3 As shown, the first valve 300 is movably connected to the housing 100, and the housing 100 may also be provided with an air inlet channel 140. Specifically, in the fresh air mode of the fresh air device 010, the first air outlet 120 is connected to the air inlet side 210 via the first valve 300 and the air inlet channel 140, and the air outlet side 220 is connected to the second air outlet 130. The first guide surface 311 is used to guide airflow from the first air outlet 120 to the air inlet channel 140.

[0046] When the fresh air device 010 is switched to the fresh air mode, the first valve 300 moves to a position that connects the first air outlet 120 with the air inlet channel 140. At this time, the first valve 300 is located between the first air outlet 120 and the air inlet channel 140, and the air inlet channel 140 is connected to the air inlet side 210 of the fan assembly 200. Under the action of the fan assembly 200, a negative pressure is formed on the air inlet side 210, allowing outdoor air to enter through the first air outlet 120 and flow toward the air inlet channel 140 under the guidance of the first guide surface 311. Then, it enters through the air inlet side 210, flows out from the air outlet side 220, and is finally discharged into the room through the second air outlet 130, thereby supplying fresh air to the room.

[0047] This configuration of the fresh air device 010 utilizes the movable connection between the first valve 300 and the housing 100 to achieve switching between exhaust mode and fresh air mode. Furthermore, even after the first valve 300 switches the fresh air device 010 to fresh air mode, the first guide surface 311 provided on the first valve 300 can still be used to guide the air intake process, thereby optimizing the airflow path during the intake process, reducing the flow resistance of the air from the first air port 120 to the air inlet channel 140, and reducing noise during the intake process.

[0048] In other words, the first guide surface 311 not only guides the airflow during exhaust, reducing outflow resistance, but also guides the airflow during intake, reducing intake resistance. Drag reduction in both modes is achieved using the same guide surface, eliminating the need for separate guide surfaces for exhaust and fresh air modes, thereby reducing costs.

[0049] Please continue to refer to Figure 2 and Figure 3 In this embodiment, a filter assembly 500 may also be disposed within the inner cavity of the housing 100. Specifically, the filter assembly 500 is disposed on the air inlet side 210 of the fan assembly 200, and the filter assembly 500 is spaced apart from and opposite to the air inlet side 210. This arrangement allows the airflow flowing through the air inlet channel 140 to be filtered by the filter assembly 500 in the fresh air mode, thereby converting it into clean fresh air. This ensures that the airflow entering the air inlet side 210 is clean fresh air, thereby ensuring that the fresh air is supplied to the room through the second air outlet 130.

[0050] In addition, by spacing the filter assembly 500 from the air inlet side 210, an air flow channel is formed between the filter assembly 500 and the air inlet side 210, so that in the exhaust mode, after the indoor air enters through the second air outlet 130, it can flow to the air inlet side 210 through the above-mentioned air flow channel, and then be discharged to the first air outlet 120 through the exhaust channel 110.

[0051] Please continue to refer to Figures 1 to 3In this embodiment, a partition 170 may be further provided within the inner cavity of the housing 100. The partition 170 divides the inner cavity of the housing 100 into an upper air guide cavity 180 and a lower storage space. The first air outlet 120 is provided in the storage space, and the second air outlet 130 is provided in the air guide cavity 180. The partition 170 defines an exhaust port 171 and an air inlet 172. The exhaust port 171 is used to connect the air guide cavity 180 with the air inlet side 210 in exhaust mode, and the air inlet 172 is used to connect the air outlet side 220 with the air guide cavity 180 in fresh air mode.

[0052] Figure 4 This is a side cross-sectional view of the fresh air device 010 provided in this embodiment in the exhaust mode. Figures 1 to 3 , and combined with Figure 4 In this embodiment, a guide slope 190 can also be set in the air inlet channel 140. Specifically, the guide slope 190 is opposite to and spaced from the air inlet side 210. In the fresh air mode, the guide slope 190 and the first guide surface 311 are respectively arranged on both sides of the first air outlet 120, wherein, along the flow direction of the airflow from the first air outlet 120 to the air inlet side 210, the guide slope 190 extends obliquely toward the direction close to the air inlet side 210.

[0053] The setting of the guide slope 190 ensures that the outdoor air can be guided by the first guide surface 311 and the guide slope 190 at the moment it enters the shell 100 from the first air outlet 120, and a path that is easy for outdoor air to enter is formed between the first guide surface 311 and the guide slope 190, which not only reduces the resistance in the air intake process and ensures the smoothness of the air intake process, but also reduces the noise in the air intake process.

[0054] Please continue to refer to Figure 4 In this embodiment, the included angle between the guide slope 190 and the axis of the first air outlet 120 is α, wherein 100°≤α≤120°.

[0055] By limiting the angle between the guide slope 190 and the axis of the first air outlet 120 to the above range, on the one hand, the situation in which the guide effect is not obvious due to the angle between the guide slope 190 and the axis of the first air outlet 120 being too small is avoided. On the other hand, the situation in which the space of the air inlet channel 140 is compressed due to the angle between the guide slope 190 and the axis of the first air outlet 120 being too large, thereby reducing the air intake volume, is also avoided.

[0056] Preferably, the value of α is 110°.

[0057] Figure 5 for Figure 4 A magnified view of the local structure at point A. Please continue to refer to Figures 1 to 4 , and combined with Figure 5In this embodiment, a transition section 150 may be further provided on the housing 100. Specifically, in exhaust mode, the air outlet side 220 is connected to the exhaust passage 110 via the transition section 150. Furthermore, a transition guide surface 160 may be provided between the transition section 150 and the exhaust passage 110. The transition guide surface 160 extends obliquely toward the axis of the exhaust passage 110 along the flow direction of the airflow in the exhaust passage 110.

[0058] By setting a transition section 150 between the air outlet side 220 and the exhaust channel 110, and setting a transition guide surface 160 between the transition section 150 and the exhaust channel 110, it is possible to guide the airflow from the transition section 150 to the exhaust channel 110, thereby reducing the resistance of the airflow to the exhaust channel 110 and further improving the smoothness of the exhaust.

[0059] Please continue to refer to Figure 1 and Figure 2 In this embodiment, the fresh air device 010 may further include a second valve 400. Specifically, the second valve 400 is movably connected to the shell 100. In the exhaust mode, the second valve 400 connects the air outlet side 220 and the exhaust channel 110 to form a transition section 150 between the air outlet side 220 and the exhaust channel 110. In the fresh air mode, the second valve 400 connects the air outlet side 220 and the second air outlet 130.

[0060] In the exhaust mode, the second valve 400 exposes the exhaust port 171 and closes the air inlet 172 to connect the outlet side 220 and the exhaust channel 110, and blocks the outlet side 220 and the air guide cavity 180, so that the indoor air in the air guide cavity 180 can flow to the air inlet side 210 through the exhaust port 171, and then flow out from the outlet side 220 and enter the exhaust channel 110, thereby achieving the purpose of being discharged from the first air port 120; in the fresh air mode, the second valve 400 exposes the air inlet 172 and closes the exhaust port 171, so that the fresh air entering from the first air port 120 can enter the air guide cavity 180 after flowing out from the outlet side 220 of the fan assembly 200, and finally be discharged to the room from the second air port 130, thereby achieving the purpose of introducing fresh air into the room.

[0061] In this embodiment, the second valve 400 is movably disposed on the partition 170, that is, by moving the second valve 400 relative to the partition 170, the second valve 400 can be switched between two positions: exposing the exhaust port 171 and closing the air inlet 172, and exposing the air inlet 172 and closing the exhaust port 171.

[0062] Figure 6 This is a cross-sectional view of the structure of the first valve 300 of the fresh air device 010 provided in this embodiment. Figures 1 to 4 , and combined with Figure 6In this embodiment, the first guide surface 311 is a concave arc surface.

[0063] This setting makes it possible that in the exhaust mode, when the airflow flows along the first guide surface 311, the flow direction of the airflow at each position of the first guide surface 311 is along the tangent direction of the first guide surface 311, and the tangent direction gradually approaches the first air outlet 120, so that the airflow flowing through the first guide surface 311 can be effectively guided to the first air outlet 120; and in the fresh air mode, the above setting makes it possible that when the airflow flows along the first guide surface 311, the flow direction of the airflow at each position of the first guide surface 311 is also along the tangent direction of the first guide surface 311, and the tangent direction gradually approaches the air inlet channel 140, so that the airflow flowing through the first guide surface 311 can be effectively guided to the air inlet channel 140, thereby ensuring the air intake volume.

[0064] Please continue to refer to Figures 1 to 4 In this embodiment, the first valve 300 includes a connected valve plate 310 and a connecting member 320. In the exhaust mode, a first guide surface 311 is formed on the valve plate 310 on a side facing the exhaust channel 110, and the connecting member 320 is rotatably connected to the shell 100.

[0065] The connecting member 320 in this embodiment can be fixedly connected to the valve plate 310, and preferably, can be formed in one piece. The connecting member 320 can include a connecting body and a rotating shaft (not shown in the figure). The rotating shaft is rotatably arranged in the housing 100, and the shape of the connecting body can be as follows: Figure 4 The plate is in the shape of a fan, and the arc edge of the fan is fixedly connected to the valve plate 310. For example, it is in the shape of a fan of 1 / 4 circle. In fact, in another embodiment, the connecting body can also be in the form of spokes, such as one, two or three spokes to connect the valve plate 310 and the shaft. Figure 2 The centrally located connector 320 and valve plate 310 are shielded by the housing 100 in the direction away from the observer, preventing gas leakage therefrom. While the spoke design can save material, it also results in uneven sidewalls during flow, potentially affecting airflow. Therefore, skilled artisans can select the appropriate form of connector based on their needs.

[0066] The use of a connector 320 to connect the valve plate 310 and rotatably connect the connector 320 to the housing 100 simplifies the transmission structure and reduces sliding resistance during the sliding process, thereby improving the operating efficiency of the first valve 300. Furthermore, in the fresh air mode, even if the other valves are not tightly sealed, the wind pressure generated by the outlet side 220 of the fan assembly 200 acts on the outside of the valve plate 310. Alternatively, in the exhaust mode, the negative pressure from the inlet side 210 of the fan acts on the valve plate 310, causing the radial pressure inside the valve plate 310 to be greater than the pressure outside. The pressure differential acts on the valve plate 310, and the load acting on the valve plate 310 is all radially inward or outward through the connector 320, without generating torque. The motor is only responsible for driving the first valve 300 to rotate to the corresponding position, without having to resist the load generated by the pressure differential, thereby reducing the load on the motor.

[0067] Of course, in another implementation, the first valve 300 may be connected to the housing 100 in a non-rotating manner, for example, in a sliding manner. Figure 4 The first valve 300 can be roughly a triangular prism. Figure 4 , one side is vertical and located on the left side of the first valve 300, the second side extends from the lower left to the upper right, and the third side extends from the upper left to the lower right. Both the second and third sides are first guide surfaces 311. When the first valve 300 is in fresh air mode, the first valve 300 rises, and the first guide surface 311 on the third side guides the airflow from the first air outlet 120 to the lower left until it reaches the air inlet side 210. Accordingly, the first valve 300 blocks the outlet of the exhaust passage 110. When the first valve 300 is in exhaust mode, the first valve 300 descends, and the first guide surface 311 on the second side guides the airflow from the first air outlet 120 to the lower right until it reaches the first air outlet 120. The first valve 300 then blocks the entrance of the air inlet passage 140.

[0068] like Figure 6 As shown, in this embodiment, the valve plate 310 is an arc-shaped plate, and the thickness of the valve plate 310 is b, wherein 2mm≤b≤4mm; and / or the central angle of the valve plate 310 is γ, wherein 35°≤γ≤50°; and / or the angle through which the first valve 300 switches between the fresh air mode and the exhaust mode is Ω, wherein 100°≤Ω≤110°.

[0069] In this embodiment, the thickness b of the valve plate 310 is set to be ≥ 2 mm, which helps ensure that the valve plate 310 has sufficient rigidity, while the thickness b of the valve plate 310 is set to be ≤ 4 mm, which can also reduce material waste. In this embodiment, the thickness b of the valve plate 310 is preferably 2.5 mm.

[0070] Setting the central angle γ of the valve plate 310 to ≥35° allows the first guide surface 311 to maintain a close or consistent flow angle with the upstream component on the airflow inlet side, and a close or consistent flow angle with the downstream component on the airflow outlet side. This prevents the airflow from experiencing sudden changes in direction when it contacts and leaves the first guide surface 311, reducing airflow obstruction caused by directional changes. Setting the central angle γ of the valve plate 310 to ≤50° prevents the airflow from experiencing large, unnecessary directional changes as it gradually turns along the first guide surface 311. Excessive directional changes when the airflow flows along the first guide surface 311 can also result in energy loss. Therefore, the aforementioned angle range helps prevent significant energy loss when the airflow enters and leaves the first guide surface 311, and also reduces significant energy loss when the airflow moves along the first guide surface 311, thereby reducing airflow obstruction. In this embodiment, the central angle γ of the valve plate 310 is preferably 42°.

[0071] Setting the angle Ω that the first valve 300 rotates through when switching between fresh air mode and exhaust mode to ≥100° helps ensure that the layout of the air inlet channel 140 and the exhaust channel 110 can sufficiently avoid the filter assembly 500, thereby preventing the size of the filter assembly 500 from being compressed and causing excessive resistance to air intake. Setting the angle Ω to ≤110° helps reduce the angular change of the airflow in the area where the first valve 300 is located, thereby reducing airflow energy waste. In this embodiment, the angle Ω is preferably 102.5°.

[0072] Please continue to refer to Figure 3 In this embodiment, in the fresh air mode, the angle between the line connecting the two ends of the first guide surface 311 along its arc shape and the axis of the first air outlet 120 is θ, where 30°≤θ≤35°.

[0073] Setting θ to ≥30° can effectively change the angle of the fresh air flow from the first air outlet 120, so that the fresh air flow can have a speed toward the filter component 500 after passing through the first guide surface 311; setting θ to ≤35° can prevent the valve plate 310 from being too long and covering part of the filter component 500, thereby reducing the utilization rate of the filter component 500, or prevent the air flow from flowing to the edge area of ​​the filter component 500 again after passing through the valve plate 310 and changing direction in the opposite direction, thereby wasting the energy of the air flow.

[0074] Preferably, the value of θ is 32°.

[0075] Example 2

[0076] Figure 7 This is a cross-sectional view of the structure of the fresh air device 010 provided in this embodiment in the exhaust mode and in the installed state. Figure 7 As shown, this embodiment provides another fresh air device 010. The difference between this fresh air device 010 and the fresh air device 010 provided in the above embodiment 1 is as follows.

[0077] Please continue to refer to Figure 7 The transition section 150 is provided with a second guide surface 421 , and the second guide surface 421 is used to guide the airflow from the air outlet side 220 to the exhaust channel 110 .

[0078] By setting a second guide surface 421 in the transition section 150, the airflow discharged through the air outlet side 220 can be guided to the exhaust channel 110 through the second guide surface 421, thereby ensuring the smoothness of the airflow flowing from the air outlet side 220 to the exhaust channel 110, further reducing the resistance of the airflow during the flow to the exhaust channel 110, and also reducing the noise before the airflow enters the exhaust channel 110.

[0079] Please continue to refer to Figure 7 In this embodiment, the extension direction of the transition section 150 is basically parallel to the instantaneous flow direction of the air outlet side 220, the exhaust channel 110 and the transition section 150 are set at an angle, the second guide surface 421 is opposite to the entrance of the exhaust channel 110, and along the flow direction of the airflow in the transition section 150, the second guide surface 421 extends obliquely toward the direction close to the exhaust channel 110.

[0080] When the air flow enters the transition section 150 through the air outlet side 220 of the fan assembly 200, since the extension direction of the transition section 150 is basically parallel to the instantaneous flow direction of the air outlet side 220, the air flow continues to flow along the original path after entering the transition section 150; when the air flow flows to the position of the second guide surface 421, it will flow along the inclined second guide surface 421, and be guided to the exhaust channel 110 by the second guide surface 421, so as to achieve the purpose of guiding the air flow by the second guide surface 421, so that the air flow in the transition section 150 can smoothly enter the exhaust channel 110.

[0081] It should be noted that the above-mentioned "basically parallel" includes both the situation where the extension direction of the transition section 150 is parallel to the instantaneous flow direction of the air outlet side 220, and the situation where the extension direction of the transition section 150 and the instantaneous flow direction of the air outlet side 220 form a certain angle, wherein the angle can be ±5°.

[0082] It should also be noted that, in this embodiment, the impeller of the fan assembly 200 is roughly arranged with its axis horizontally on the housing 100, and the radial direction of the impeller is roughly the up and down direction in the figure. Under the action of the fan assembly 200, the air flow will flow out radially through the impeller, so the above-mentioned "instantaneous flow direction of the air outlet side 220" refers to the radial direction of the impeller, specifically the radial upward direction of the impeller.

[0083] Please continue to refer to Figure 7 In this embodiment, the second guide surface 421 may be a concave arc surface. This configuration of the second guide surface 421 ensures that, as the airflow flows from the air outlet side 220 to the exhaust duct 110, the airflow at each position on the second guide surface 421 flows along the tangent direction of the second guide surface 421, and the tangent direction gradually approaches the exhaust duct 110. This allows the airflow flowing along the second guide surface 421 to be effectively guided to the exhaust duct 110, further improving the smoothness of the exhaust process.

[0084] In this embodiment, the arc radius of the second guide surface 421 is a, where 60 mm ≤ a ≤ 80 mm.

[0085] By limiting the arc radius of the second guide surface 421 within the above-mentioned range, on the one hand, the situation in which vortices are generated at the second guide surface 421 due to the arc radius of the second guide surface 421 being too small is avoided, thereby ensuring the exhaust efficiency. On the other hand, the situation in which the guide effect is deteriorated due to the arc radius of the second guide surface 421 being too large is also avoided.

[0086] In this embodiment, the central angle corresponding to the second guide surface 421 is β, where 45°≤β≤60°.

[0087] By limiting the central angle corresponding to the second guide surface 421 within the above-mentioned range, on the one hand, it avoids the situation where the second guide surface 421 is too short due to the central angle of the second guide surface 421 being too small, thereby failing to achieve the diversion effect; on the other hand, it also avoids the situation where the second guide surface 421 is too long due to the central angle of the second guide surface 421 being too large, thereby excessively occupying the space of the transition section 150.

[0088] It should be noted that, in this embodiment, the specific representation of the arc radius a of the second guide surface 421 and the corresponding central angle β can be found in the following embodiment 3. Figure 8 .

[0089] Please continue to refer to Figure 7 In this embodiment, the second guide surface 421 is formed on the second valve 400 .

[0090] This form of providing the second guide surface 421 on the second valve 400 eliminates the need for processing inside the housing 100 , thereby reducing manufacturing costs.

[0091] Please continue to refer to Figure 7In this embodiment, the second valve 400 may include a connected valve body 410 and a blocking member 420. Specifically, the blocking member 420 is opposite to the inlet of the exhaust channel 110, and an avoidance gap 430 is set between the blocking member 420 and the valve body 410 along the flow direction of the airflow in the transition section 150, wherein the second guide surface 421 is formed on the blocking member 420; in the fresh air mode, the blocking member 420 is inserted into the exhaust channel 110, and part of the channel wall of the exhaust channel 110 is inserted into the avoidance gap 430.

[0092] This arrangement of the second valve 400 ensures that when the fresh air device 010 switches from exhaust mode to fresh air mode, as the second valve 400 moves on the partition 170, the valve body 410 will continue to approach the exhaust passage 110. When the valve body 410 moves to the entrance of the exhaust passage 110, the valve body 410 will close the exhaust port 171, and the blocking member 420 will be inserted into the exhaust passage 110. At the same time, the upper channel wall of the exhaust passage 110 will be inserted into the avoidance gap 430, which effectively avoids the exhaust passage 110 and prevents movement interference.

[0093] Example 3

[0094] Figure 8 This is a side cross-sectional view of the fresh air device 010 provided in this embodiment in the exhaust mode. Figure 8 As shown, this embodiment provides another fresh air device 010. The opening and closing principle and the diversion principle of the first valve 300 of the fresh air device 010 are the same as the opening and closing principle and the diversion principle of the first valve 300 provided in the above-mentioned embodiment 1 and embodiment 2, but the specific structure is different, and the difference is as described below.

[0095] Figure 9 This is a cross-sectional view of the structure of the first valve 300 of the fresh air device 010 provided in this embodiment. Figure 8 , and combined with Figure 9 In this embodiment, the central angle corresponding to the valve plate 310 of the first valve 300 is 90°. This setting can effectively improve the structural strength of the valve plate 310, thereby extending the service life of the first valve 300.

[0096] In addition, in this embodiment, the angle Ω through which the first valve 300 rotates when switching between the fresh air mode and the exhaust air mode is 105.6°; the thickness of the valve plate 310 is 3 mm, wherein the radius of the inner arc surface (first guide surface 311) of the valve plate 310 is 46.5 mm, and the radius of the outer arc surface of the valve plate 310 is 49.5 mm.

[0097] Example 4

[0098] Figure 10 This is a schematic diagram of the main structure of the air conditioning cabinet provided in this fourth embodiment. Figure 10 As shown, this embodiment provides an air-conditioning cabinet, including a body 020 and the fresh air device 010 in the above-mentioned embodiment one, embodiment two or embodiment three. Specifically, the body 020 has a heat exchange module 021, and the body 020 opens a accommodating cavity, which is located below the heat exchange module 021. The fresh air device 010 is installed in the accommodating cavity, and the first air outlet 120 faces the rear of the air-conditioning cabinet; the axis of the fan assembly 200 is horizontally arranged, the air inlet side 210 is opposite to the rear of the air-conditioning cabinet, and the air outlet side 220 faces upward.

[0099] By setting the fresh air device 010 in the above-mentioned embodiment 1, embodiment 2 or embodiment 3 in the air-conditioning cabinet, the air-conditioning cabinet accordingly has all the advantages of the fresh air device 010 in the above-mentioned embodiment 1, embodiment 2 or embodiment 3, which will not be repeated here.

[0100] In addition, by setting the axis of the fan assembly 200 to be horizontal and making the air inlet side 210 of the fan assembly 200 opposite to the rear of the air-conditioning cabinet, the first air outlet 120 and the air inlet side 210 of the fan assembly 200 are in relative positions in the accommodating cavity, thereby shortening the flow path of the external air from the first air outlet 120 to the air inlet side 210 in the fresh air mode, which is beneficial to improving the smoothness of the air intake.

[0101] Generally speaking, when the air-conditioning cabinet is in use, the side of the air-conditioning cabinet facing the indoor space or the indoor personnel activity area is the front of the air-conditioning cabinet; and the side of the air-conditioning cabinet facing the corner or the wall is the rear of the air-conditioning cabinet.

[0102] Please continue to refer to Figure 10 In this embodiment, the air conditioning cabinet may further include a fresh air duct 030, wherein one end of the fresh air duct 030 is connected to the first air outlet 120 of the fresh air device 010 (see Figures 1 to 4 ,as well as Figure 7 ), the other end of the fresh air duct 030 is passed through the wall 040.

[0103] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

[0104] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0105] In the above embodiments, descriptions of directions such as “inside”, “outside”, “front”, “back”, “upper”, “lower”, and “side” are all based on the drawings.

[0106] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fresh air device, characterized in that: The invention comprises a housing (100), a fan assembly (200) and a first valve (300), wherein the housing (100) is provided with an exhaust passage (110), a first air outlet (120) and a second air outlet (130), wherein the first air outlet (120) is connected to the outside of the room, and the second air outlet (130) is connected to the inside of the room; the fan assembly (200) is arranged in the inner cavity of the housing (100), and the fan assembly (200) has an air inlet side (210) and an air outlet side (220); in the exhaust mode of the fresh air device, the second air outlet (130) is connected to the air inlet side (210), and the fresh air device is in the exhaust mode. The air outlet side (220) is connected to the first air outlet (120) through the exhaust channel (110) and the first valve (300); the first valve (300) is provided with a first guide surface (311), and the first guide surface (311) is used to guide the air flow from the exhaust channel (110) to the first air outlet (120); the first valve (300) is movably connected to the housing (100), and the housing (100) is also provided with an air inlet channel (140); in the fresh air mode of the fresh air device, the first air outlet (120) is connected to the air inlet side (21 0) is communicated with the air inlet channel (140) through the first valve (300), the air outlet side (220) is communicated with the second air outlet (130), the first guide surface (311) is used to guide the air flow from the first air outlet (120) to the air inlet channel (140); the air inlet channel (140) is provided with a guide slope (190), the guide slope (190) is opposite to and spaced from the air inlet side (210); in the fresh air mode, the guide slope (190) and the first guide surface (311) are respectively provided on both sides of the first air outlet (120). side, wherein, along the flow direction of the airflow from the first air outlet (120) to the air inlet side (210), the guide slope (190) extends obliquely in a direction close to the air inlet side (210); the housing (100) is further provided with a transition section (150), and in the exhaust mode, the air outlet side (220) is connected to the exhaust channel (110) through the transition section (150); the transition section (150) is provided with a second guide surface (421), and the second guide surface (421) is used to guide the airflow from the air outlet side (220) to flow to the exhaust channel (110).

2. The fresh air device according to claim 1, characterized in that: The included angle between the guide slope (190) and the axis of the first air outlet (120) is α, wherein 100°≤α≤120°.

3. The fresh air device according to claim 1, characterized in that: The extension direction of the transition section (150) is substantially parallel to the instantaneous flow direction of the air outlet side (220); the exhaust channel (110) and the transition section (150) are arranged at an angle; the second guide surface (421) is opposite to the inlet of the exhaust channel (110); and along the flow direction of the airflow in the transition section (150), the second guide surface (421) extends obliquely in a direction close to the exhaust channel (110).

4. The fresh air device according to claim 3, characterized in that: The second guide surface (421) is a concave arc surface.

5. The fresh air device according to claim 4, characterized in that: The arc radius of the second guide surface (421) is a, wherein 60 mm ≤ a ≤ 80 mm; and / or the central angle corresponding to the second guide surface (421) is β, wherein 45° ≤ β ≤ 60°.

6. The fresh air device according to claim 1, characterized in that: A transition guide surface (160) is further provided between the transition section (150) and the exhaust channel (110), and along the flow direction of the air flow in the exhaust channel (110), the transition guide surface (160) extends obliquely in a direction close to the axis of the exhaust channel (110).

7. The fresh air device according to claim 1, characterized in that: The fresh air device further includes a second valve (400), the second valve (400) being movably connected to the housing (100); in the exhaust mode, the second valve (400) connects the air outlet side (220) and the exhaust channel (110) to form the transition section (150) between the air outlet side (220) and the exhaust channel (110); in the fresh air mode, the second valve (400) connects the air outlet side (220) and the second air outlet (130); and the second guide surface (421) is formed on the second valve (400).

8. The fresh air device according to claim 7, characterized in that: The second valve (400) includes a valve body (410) and a blocking member (420) connected to each other, the blocking member (420) is opposite to the inlet of the exhaust channel (110), and along the flow direction of the air flow in the transition section (150), an avoidance gap (430) is set between the blocking member (420) and the valve body (410), and the second guide surface (421) is formed on the blocking member (420); in the fresh air mode, the blocking member (420) is inserted into the exhaust channel (110), and part of the channel wall of the exhaust channel (110) is inserted into the avoidance gap (430).

9. The fresh air device according to any one of claims 1 to 8, characterized in that: The first guiding surface (311) is a concave arc surface.

10. The fresh air device according to claim 9, characterized in that: The first valve (300) includes a valve plate (310) and a connecting member (320) connected to each other. In the exhaust mode, a surface of the valve plate (310) facing the exhaust channel (110) forms the first guide surface (311), and the connecting member (320) is rotatably connected to the housing (100).

11. The fresh air device according to claim 10, characterized in that: The valve plate (310) is an arc-shaped plate, and the thickness of the valve plate (310) is b, wherein 2mm≤b≤4mm; and / or the central angle of the valve plate (310) is γ, wherein 35°≤γ≤50°; and / or the angle through which the first valve (300) rotates when switching between the fresh air mode and the exhaust air mode is Ω, wherein 100°≤Ω≤110°.

12. The fresh air device according to claim 9, characterized in that: In the fresh air mode, the angle between the line connecting the two ends of the first guide surface (311) along its arc-shaped direction and the axis of the first air outlet (120) is θ, where 30°≤θ≤35°.

13. An air-conditioning cabinet, characterized in that: The invention comprises a body (020) and a fresh air device according to any one of claims 1 to 12, wherein the body (020) has a heat exchange module (021), the body (020) is provided with a receiving cavity, the receiving cavity is located below the heat exchange module (021), the fresh air device is installed in the receiving cavity, and the first air outlet (120) faces the rear of the air conditioning cabinet; the axis of the fan assembly (200) is arranged horizontally, the air inlet side (210) is opposite to the rear of the air conditioning cabinet, and the air outlet side (220) faces upward.

Images