Fresh air device, floor-standing air conditioner indoor unit and air conditioner

Abstract

The present invention discloses a fresh air device, a floor-standing air conditioner indoor unit, and an air conditioner. The fresh air device includes a fan, a volute assembly, and a bypass switch door. The volute assembly defines a fresh air inlet, an air outlet, a fresh air inlet channel, a bypass outlet channel, and a fresh air cavity connected to the air outlet. The fan is installed in the fresh air cavity. The fresh air inlet channel and the bypass outlet channel are isolated from each other and connected through a gas circulation port. The fresh air inlet channel connects the fresh air inlet with the air inlet end of the fresh air cavity, the bypass outlet channel connects the fresh air inlet with the air outlet end of the fresh air cavity, and the return air channel connects the indoor air and the air inlet end of the fresh air cavity. The bypass switch door is located at the gas circulation port, so that either the fresh air inlet channel or the bypass outlet channel can be connected to the fresh air inlet. The fresh air device of the present invention has a simple structure, few components, low cost, small size, and small space occupation.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a fresh air device, a floor-standing air-conditioning indoor unit and an air conditioner. Background Art

[0002] With consumers' growing health awareness, air conditioners with fresh air functions have become a trend in high-end products. Most existing household fresh air air conditioners can only draw in fresh air from outside, which is then discharged indoors after passing through a purification filter and fan. This solution has a single air treatment mode and can only introduce fresh air indoors, which cannot fully meet user needs.

[0003] By adding a waste air exhaust function to the fresh air device to discharge the indoor waste air to the outside, the indoor fresh air exchange rate can be accelerated and the air treatment mode can be diversified. Currently, in order to realize the fresh air device with both waste air exhaust and fresh air introduction functions, an exhaust fan is added to the existing fresh air device structure. This makes the entire fresh air device complex, with many parts, high cost, large size, and large space occupation.

[0004] The above content is only used to assist in understanding the technical solution of the invention and does not constitute an admission that the above content is prior art. Summary of the Invention

[0005] The main purpose of the present invention is to provide a fresh air device, aiming to simplify the structure of the fresh air device.

[0006] To achieve the above-mentioned purpose, the fresh air device proposed in the present invention includes a fan, a volute assembly and a bypass switch door;

[0007] The volute assembly defines a fresh air inlet, an air outlet, a fresh air inlet channel, a bypass air outlet channel, and a fresh air cavity connected to the air outlet. The fan is installed in the fresh air cavity. The fresh air inlet channel and the bypass air outlet channel are isolated from each other and connected through a gas flow port. The fresh air inlet channel connects the fresh air inlet and the air inlet end of the fresh air cavity, and the bypass air outlet channel connects the fresh air inlet and the air outlet end of the fresh air cavity.

[0008] The bypass switch door is arranged at the gas circulation port, so that either the fresh air inlet channel or the bypass air outlet channel is connected to the fresh air inlet.

[0009] In one embodiment, the volute assembly includes a shell and an air inlet volute, the shell defines the fresh air cavity and the bypass air outlet channel; the shell is also provided with an air inlet connected to the fresh air cavity; the air inlet volute cover is arranged at the air inlet of the shell, the air inlet volute is provided with the fresh air inlet, the fresh air inlet channel is defined in the air inlet volute, the bypass air outlet channel 124 is connected to the fresh air inlet through the fresh air inlet channel, and the fresh air inlet channel is connected to the fresh air cavity through the air inlet.

[0010] In one embodiment, a return air channel is also defined in the shell, and the return air channel connects the indoor air and the air inlet end of the fresh air chamber. The fresh air device also includes a return air switch door, and the return air switch door is installed in the return air channel to open or close the return air channel.

[0011] In one embodiment, the return air channel is defined in the air inlet volute and / or the shell, and the return air channel is connected to the fresh air inlet channel, and both are connected to the fresh air cavity through the air inlet.

[0012] In one embodiment, the volute assembly further includes an air outlet volute covering the air outlet, and the air outlet volute is provided with a fresh air outlet connected to the air outlet.

[0013] In one embodiment, the fan is a centrifugal fan, the air inlet volute is located on an axial side of the fan, and the air outlet volute is located on a radial side of the fan.

[0014] In one embodiment, the fresh air device also includes an air blocking component, which is arranged in the air outlet volute and located between the fresh air outlet and the air outlet to block the air flow from being blown out through the fresh air outlet when the bypass air outlet channel is connected to the fresh air inlet, and to allow the air flow to be blown out through the fresh air outlet when the fresh air inlet channel is connected to the fresh air inlet.

[0015] In one embodiment, the air blocking assembly includes a filter assembly, and the filter assembly extends in the up-down direction, or the filter assembly extends in the horizontal direction.

[0016] In one embodiment, the filter assembly includes a filter bracket and a filter installed on the filter bracket. A handle is provided on one side of the filter bracket, and an operating port is provided on the side wall of the air outlet volute corresponding to the handle. The moving trajectory of the handle when taken out of the operating port is set forward.

[0017] In one embodiment, the air outlet volute has a first side wall and a second side wall that are relatively arranged, and the first side wall is located on the leeward side of the wind blocking component. In the air outlet direction of the air outlet volute, the first side wall is arranged in an outwardly convex arc shape, and / or the second side wall is arranged to be inclined toward the first side wall.

[0018] In one embodiment, a return air port connected to a return air channel is provided on the air inlet volute and / or the housing, and the return air switch door is rotatably installed at the return air port to open or close the return air port.

[0019] In one embodiment, the bypass switch door is rotatably mounted on the volute assembly so that the fresh air inlet channel is connected to the fresh air inlet, or the bypass air outlet channel is connected to the fresh air inlet.

[0020] In one embodiment, the fresh air device also includes an air blocking component, which is arranged corresponding to the air outlet to block the air flow from being blown out through the air outlet when the bypass air outlet channel is connected to the fresh air inlet, and to allow the air flow to be blown out through the air outlet when the fresh air inlet channel is connected to the fresh air inlet. The air blocking component includes a purification component and / or an air outlet switch door.

[0021] The present invention also provides a floor-standing air conditioner indoor unit comprising a casing and a fresh air device;

[0022] The housing is provided with an air inlet and a fresh air outlet;

[0023] The fresh air device includes a fan, a volute assembly and a bypass switch door;

[0024] The volute assembly defines a fresh air inlet, an air outlet, a fresh air inlet channel, a bypass air outlet channel, and a fresh air cavity connected to the air outlet. The fan is installed in the fresh air cavity. The fresh air inlet channel and the bypass air outlet channel are isolated from each other and connected through a gas flow port. The fresh air inlet channel connects the fresh air inlet and the air inlet end of the fresh air cavity, and the bypass air outlet channel connects the fresh air inlet and the air outlet end of the fresh air cavity.

[0025] The bypass switch door is provided at the gas flow port, so that either the fresh air inlet channel or the bypass air outlet channel is connected to the fresh air inlet;

[0026] The fresh air device is installed in the casing, the fresh air inlet of the fresh air device is connected to the outside through the air outlet, and the air outlet of the fresh air device is connected to the fresh air outlet.

[0027] In one embodiment, a wind dispersion module is provided at the fresh air outlet, and the wind dispersion module is suitable for allowing air flow to pass through and diffusing the air flow passing through it.

[0028] The present invention further provides an air conditioner, comprising an air conditioner outdoor unit and a floor-standing air conditioner indoor unit connected via a refrigerant pipe, wherein the floor-standing air conditioner indoor unit comprises a casing and a fresh air device;

[0029] The housing is provided with an air inlet, an air intake and a fresh air outlet;

[0030] The fresh air device includes a fan, a volute assembly and a bypass switch door;

[0031] The volute assembly defines a fresh air inlet, an air outlet, a fresh air inlet channel, a bypass air outlet channel, and a fresh air cavity connected to the air outlet. The fan is installed in the fresh air cavity. The fresh air inlet channel and the bypass air outlet channel are isolated from each other and connected through a gas flow port. The fresh air inlet channel connects the fresh air inlet and the air inlet end of the fresh air cavity, and the bypass air outlet channel connects the fresh air inlet and the air outlet end of the fresh air cavity.

[0032] The bypass switch door is provided at the gas flow port, so that either the fresh air inlet channel or the bypass air outlet channel is connected to the fresh air inlet;

[0033] The fresh air device is installed in the casing, the fresh air inlet of the fresh air device is connected to the outside through the air outlet, and the air outlet of the fresh air device is connected to the fresh air outlet.

[0034] The fresh air device of the present invention defines a bypass air outlet channel within the volute assembly, so that the bypass air outlet channel connects the fresh air inlet and the air outlet end of the fresh air chamber. By arranging the bypass switch door at the gas flow opening of the fresh air inlet channel and the bypass air outlet channel, one of the fresh air inlet channel and the bypass air outlet channel can be connected to the fresh air inlet. The fresh air device has a fresh air mode and a sewage air mode, thereby being able to meet the user's usage needs. Moreover, by simply adding the bypass air outlet channel and the bypass switch door to the current fresh air device, the fresh air mode and the sewage air mode can be switched, without the need for an additional fan. This makes the entire fresh air device simple in structure, with fewer parts, low cost, small size, and small space occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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 only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0036] Figure 1 This is a structural diagram of an embodiment of a fresh air device of the present invention;

[0037] Figure 2 for Figure 1 Schematic diagram of the structure of the fresh air device from another angle;

[0038] Figure 3 for Figure 1 A schematic structural diagram of an embodiment of a housing of a medium fresh air device;

[0039] Figure 4 for Figure 1 A schematic structural diagram of another embodiment of the housing of the medium fresh air device;

[0040] Figure 5 for Figure 1 A schematic structural diagram of an embodiment of an air inlet volute of a medium fresh air device;

[0041] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure of the mid-inlet volute;

[0042] Figure 7 This is a structural schematic diagram of another embodiment of the fresh air device of the present invention;

[0043] Figure 8 for Figure 7 Schematic diagram of the structure of the fresh air device from another angle;

[0044] Figure 9 for Figure 7 A structural diagram of the fresh air device from another angle;

[0045] Figure 10 for Figure 7 Schematic diagram of the front structure of the fresh air device;

[0046] Figure 11 for Figure 10 Schematic diagram of the cross-sectional structure along the middle line AA;

[0047] Figure 12 for Figure 10 Schematic diagram of the cross-sectional structure along the middle edge BB;

[0048] Figure 13 for Figure 10 Schematic diagram of the cross-sectional structure of the middle edge CC;

[0049] Figure 14 for Figure 8 Schematic diagram of the partially exploded structure of the fresh air device;

[0050] Figure 15 for Figure 9 Schematic diagram of the partially exploded structure of the fresh air device;

[0051] Figure 16This is a structural diagram of an embodiment of a floor-standing air-conditioning indoor unit of the present invention;

[0052] Figure 17 for Figure 16 A schematic diagram of the front structure of the indoor unit of a floor-standing air conditioner;

[0053] Figure 18 for Figure 17 Schematic diagram of the cross-sectional structure of the middle edge DD, where the return air switch door is in the closed state;

[0054] Figure 19 for Figure 17 Schematic diagram of the cross-sectional structure of the middle edge DD, where the return air switch door is in the open state;

[0055] Figure 20 for Figure 17 Schematic diagram of the cross-sectional structure along the EE;

[0056] Figure 21 for Figure 17 Schematic diagram of the cross-sectional structure of the middle edge FF, wherein the fresh air device is in fresh air mode;

[0057] Figure 22 for Figure 17 Schematic diagram of the cross-sectional structure of the middle edge FF, in which the fresh air device is in exhaust mode.

[0058] Label name Label name Label name 100 Fresh air device 127 case 131 Bypass switch door 110 fan 127a air inlet 132 Return air switch door 120 Volute assembly 127b Return air vent 140 Wind resistance components 121 Fresh air inlet 128 Inlet volute 141 filter assembly 122 air outlet 129 Air outlet volute 142 Air outlet door 123 Fresh air inlet channel 129a Fresh air outlet 200 chassis 124 Bypass air outlet 129b First side wall 210 Fresh air outlet 125 Return air duct 129c Second side wall 300 Air dispersion module 126 New air cavity 129d Operation port

[0059] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0060] 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 suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes Solution A, Solution B, or solutions that meet both A and B.

[0061] The present invention provides a fresh air device which can be used alone or in equipment such as an air conditioner indoor unit, a purifier, and an air machine.

[0062] In the embodiment of the present invention, Figures 1 to 15As shown, the fresh air device 100 includes a fan 110, a volute assembly 120, and a bypass switch door 131. The volute assembly 120 defines a fresh air inlet 121, an air outlet 122, a fresh air inlet channel 123, a bypass air outlet channel 124, and a fresh air cavity 126 connected to the air outlet 122. The fan 110 is installed in the fresh air cavity 126. The fresh air inlet channel 123 and the bypass air outlet channel 124 are isolated from each other and connected through a gas flow port. The fresh air inlet channel 123 connects the fresh air inlet 121 with the air inlet end of the fresh air cavity 126, the bypass air outlet channel 124 connects the fresh air inlet 121 with the air outlet end of the fresh air cavity 126, and the return air channel 125 connects the indoor air and the air inlet end of the fresh air cavity 126. The valve assembly includes a bypass switch door 131 and a return air switch door 132. The bypass switch door 131 is arranged at the gas flow opening of the fresh air inlet channel 123 and the bypass air outlet channel 124, so that either the fresh air inlet channel 123 or the bypass air outlet channel 124 can be connected to the fresh air inlet 121.

[0063] In this embodiment, the volute assembly 120 as a whole can be roughly arranged in a cubic shape, or it can be of an irregular shape. The volute assembly 120 can be composed of a shell-like structure, so that the fresh air cavity 126 is separated from the fresh air inlet channel 123 and the bypass air outlet channel 124 by a partition. The volute assembly 120 can also be composed of multiple shell-like structures. The setting positions of the fresh air inlet 121 and the air outlet 122 can be selected and designed according to the type of fan 110. A wind valve is provided at the fresh air inlet 121 to open or close the fresh air inlet 121. The fresh air inlet 121 is connected to the outside through a fresh air duct. Specifically, an air duct adapter can be provided to connect the fresh air inlet 121 and the fresh air duct. When the fan 110 adopts a centrifugal fan 110, the fresh air cavity 126 can be formed by the inner cavity of the centrifugal volute. Usually, the fresh air inlet 121 is located on the air inlet side of the fan 110, and the air outlet 122 is located on the air outlet side of the fan 110.

[0064] The bypass switch door 131 can be a door plate structure, or a shutter structure, etc. The fresh air inlet channel 123 and the bypass air outlet channel 124 are connected through the gas circulation port. By setting the bypass switch door 131 at the gas circulation port of the two, it is possible to switch and select the fresh air inlet 121 to be connected to the bypass air outlet channel 124, or the fresh air inlet 121 to be connected to the fresh air inlet channel 123. In a specific embodiment, the bypass switch door 131 is rotatably mounted on the volute assembly 120 so that the fresh air inlet channel 123 is connected to the fresh air inlet 121, or the bypass air outlet channel 124 is connected to the fresh air inlet 121. Thereby, the conduction state of the fresh air inlet 121 is switched. The rotation of the bypass switch door 131 can be driven by a motor or can be achieved manually.

[0065] It is understood that the bypass outlet duct 124 connects the fresh air inlet 121 with the outlet end of the fresh air chamber 126, that is, the outlet 122 and the bypass outlet duct 124 are connected in parallel at the outlet end of the fresh air chamber 126. Therefore, when the bypass switch door 131 blocks the connection between the fresh air inlet 121 and the fresh air inlet duct 123 and connects the fresh air inlet 121 with the bypass outlet duct 124, the airflow from the outlet side of the fan 110 can flow into the bypass outlet duct 124 or out of the outlet 122, thereby discharging the dirty air from the room to the outside. At this time, in order to ensure that most or all of the indoor air flow flowing in from the return air duct 125 is discharged through the bypass air outlet duct 124, an air blocking component 140, such as an air outlet switch door 142 or a filter component 141, can be set at the air outlet 122. Since the resistance of air blowing out through the bypass air outlet duct 124 is significantly smaller than the resistance of air passing through the air blocking component 140, it is equivalent to the air outlet 122 being short-circuited by the bypass air outlet duct 124, so that the air flow blown out by the fan 110 directly flows into the bypass air outlet duct 124 and is blown outdoors through the fresh air inlet 121, thereby improving the overall effect of the fresh air device 100 in discharging indoor polluted air.

[0066] The fresh air device 100 has a fresh air mode and a sewage air mode, such as Figure 13 and Figure 21 As shown, when the fresh air device 100 is in the fresh air mode, the fresh air device 100 is running, the air valve of the fresh air inlet 121 is open, and the bypass switch door 131 blocks the air flow between the fresh air inlet 121 and the bypass air outlet channel 124. The fan 110 is working. At this time, the fan 110 acts as a fresh air fan 110, and introduces outdoor fresh air through the fresh air inlet 121 and the fresh air inlet channel 123 into the fresh air chamber 126. The fresh air then enters the air outlet channel and is blown out into the room through the fresh air outlet 129a to achieve fresh air supply.

[0067] When the fresh air device 100 is in the sewage exhaust mode, Figure 22 As shown, the fresh air device 100 is running, the air valve of the fresh air inlet 121 is open, and the bypass switch door 131 blocks the air flow between the fresh air inlet 121 and the fresh air inlet channel 123. The fan 110 is working. At this time, the fan 110 acts as an exhaust fan 110, which can introduce indoor polluted air or polluted air in the volute assembly 120 into the fresh air chamber 126, and make the air flow enter the bypass outlet channel 124, and then blow it out to the outside through the fresh air inlet 121, so as to discharge the polluted air, thereby achieving clean indoor air or clean air in the volute assembly 120, and improving the user experience.

[0068] The fresh air device 100 of the present invention defines a bypass outlet channel 124 in the volute assembly 120 so that the bypass outlet channel 124 connects the fresh air inlet 121 with the air outlet end of the fresh air chamber 126. By setting the bypass switch door 131 at the gas flow port between the fresh air inlet channel 123 and the bypass outlet channel 124, the fresh air inlet channel 123 and the bypass outlet channel 124 can be connected to the fresh air inlet 121. The fresh air device 100 has a fresh air mode and a sewage exhaust mode, thereby meeting the user's usage needs. Moreover, by only adding the bypass outlet channel 124 and the bypass switch door 131 to the current fresh air device 100, it is possible to switch between the fresh air mode and the exhaust mode, without the need to add another set of fans 110, so that the entire fresh air device 100 has a simple structure, few parts, low cost, small size, and small space occupation.

[0069] In one embodiment, please refer to Figures 13 to 15 、 Figure 21 and Figure 22 The fresh air device 100 also includes an air blocking component 140, which is arranged corresponding to the air outlet 122 to block the air flow from being blown out through the air outlet 122 when the bypass air outlet channel 124 is connected to the fresh air inlet 121, and to allow the air flow to be blown out through the air outlet 122 when the fresh air inlet channel 123 is connected to the fresh air inlet 121.

[0070] In this embodiment, it is understood that an outlet volute 129 can be added to the outlet 122 to achieve pressurization and change the outlet wind direction, or the air flow can be blown out directly from the outlet 122. The air blocking component 140 can be specifically arranged in the outlet air duct formed by the outlet volute 129. It can also be arranged at the outlet 122. The air blocking component 140 includes a purification component and / or an outlet switch door 142. Please refer to Figure 22Furthermore, the wind-blocking component 140 includes a purification component and / or an air outlet switch door 142. The purification component may specifically include one or more combinations of a HEPA net, an activated carbon net, a formaldehyde, VOC, TVOC, toluene and other gaseous pollutant filter, an electrostatic dust removal module, and a negative ion module. The air outlet switch door 142 is rotatably mounted on the volute component 120, and the air outlet switch door 142 can be driven to rotate by a drive motor, or the air outlet switch door 142 can be manually rotated. The air outlet 122 can be opened or closed, or the air outlet channel can be blocked or opened through the air outlet switch door 142. Since the resistance of air blowing out through the bypass air outlet channel 124 is significantly less than the resistance through the wind-blocking component 140, it is equivalent to the air outlet 122 being short-circuited by the bypass air outlet channel 124, so that the airflow blown out by the fan 110 directly flows into the bypass air outlet channel 124 and is blown out to the outdoors through the fresh air inlet 121. In this way, the entire fresh air device 100 can continuously discharge indoor air to the outside in the exhaust mode, and has high overall efficiency, low energy consumption, better reliability and performance.

[0071] Specifically, if Figures 1 to 15 As shown, the volute assembly 120 includes a shell 127 and an air inlet volute 128, the shell 127 defines a fresh air cavity 126 and the bypass air outlet channel 124; the shell 127 is also provided with an air inlet 127a connected to the fresh air cavity 126; the air inlet volute 128 is covered at the air inlet 127a of the shell 127, and a fresh air inlet 121 is provided on the air inlet volute 128, and a fresh air inlet channel 123 is defined in the air inlet volute 128, the bypass air outlet channel 124 is connected to the fresh air inlet 121 through the fresh air inlet channel 123, and the fresh air inlet channel 123 is connected to the fresh air cavity 126 through the air inlet 127a.

[0072] In this embodiment, the shape of the shell 127 can be a cube or a rectangular parallelepiped. The shell 127 and the air inlet volute 128 can be provided as an integral whole or as a separate body, and can be connected by screws, bonding, etc. The air inlet volute 128 is specifically a sealing cover provided on the shell 127 to improve the performance of the whole machine. The fresh air chamber 126 can be formed by the inner wall surface of the shell 127, or by the volute inside the shell 127. In order to facilitate the installation and disassembly of the fan 110, the shell 127 is composed of two detachably connected sub-shells. The bypass switch door 131 can be installed on the air inlet volute 128, or on the shell 127. The bypass air outlet channel 131 is connected to the fresh air inlet 121 through part of the fresh air inlet channel 123. The bypass switch door 131 is switched to block the bypass outlet passage 131 or the fresh air inlet passage 123 away from the gas flow port, that is, away from the fresh air inlet 121, so that the fresh air inlet 121 can be switched to communicate with the fresh air inlet passage 123 or with the bypass outlet passage 124. The housing 127 and the air inlet volute 128 can also define the fresh air inlet passage 123 together.

[0073] In one embodiment, if Figures 1 to 4 、 Figures 7 to 15 As shown, a return air channel 125 is also defined in the shell, and the return air channel 125 connects the indoor air and the air inlet end of the fresh air chamber 126. The fresh air device 100 also includes a return air switch door 132, and the return air switch door 132 is installed in the return air channel 125 to open or close the return air channel 125.

[0074] In this embodiment, it is understood that the return air duct 125 is isolated from the bypass air outlet duct 124. This allows the indoor airflow to enter the return air duct 125 and then flow into the air inlet side of the fresh air chamber 126 through the air inlet 127a or into the air inlet side of the fresh air chamber 126 through other openings. The return air switch door 132 can be a door plate structure or a louver structure. The return air duct 125 connects the indoor air and the air inlet end of the fresh air chamber 126, and a return air port 127b connected to the indoor air is provided on the volute assembly 120. The return air switch door 132 can be provided at the return air port 127b or within the return air duct 125, as long as it can open or close the return air duct 125. The return air switch door 132 can be rotatably mounted on the volute assembly 120 to enable rotation to open or close the return air duct 125. The rotation of the return air switch door 132 can be driven by a motor or manually.

[0075] By setting up the return air channel 125 and the return air switch door 132, the indoor polluted air can be introduced into the fresh air chamber 126 through the return air port 127b and the return air channel 125, and the air flow enters the bypass air outlet channel 124, and then blown out to the outside through the fresh air inlet 121, so as to discharge the indoor polluted gas, thereby achieving clean indoor air and improving the user experience.

[0076] On the basis of the above embodiment, further, the return air channel 125 is defined in the air inlet volute 128 and / or the shell 127, and the return air channel 125 is connected to the fresh air inlet channel 123, and both are connected to the fresh air cavity 126 through the air inlet 127a. The return air channel 125 can be defined only by the air inlet volute 128 or the shell 127, or the return air channel 125 can be defined by the air inlet volute 128 and the shell 127 together. In this way, the space between the air inlet 127a of the shell 127 and the air inlet volute 128 can be fully utilized, making the overall structure more compact, and there is no need to add an additional opening to connect the return air channel 125 and the air inlet end of the fresh air cavity 126, thereby simplifying the structure and allowing the air inlet 127a on the shell 127 to be set larger, thereby improving the air intake efficiency and thus improving the performance of the entire machine.

[0077] In one embodiment, please refer to Figures 7 to 15 、 Figure 21 and Figure 22 The volute assembly 120 further includes an air outlet volute 129 covering the air outlet 122 , and the air outlet volute 129 is provided with a fresh air outlet 129 a communicating with the air outlet 122 .

[0078] In this embodiment, an air outlet duct is formed in the air outlet volute 129. The air outlet volute 129 and the shell 127 can be provided as one piece or as a separate body, and can be connected by screws, bonding, etc. The air outlet volute 129 is specifically a sealing cover provided on the shell 127 to improve the performance of the whole machine. By providing the air outlet volute 129, the air outlet pressure of the fresh air device 100 is greater, thereby improving the performance. And the air outlet direction can be changed by the air outlet volute 129 to meet the use requirements. Specifically, the air outlet direction of the fresh air outlet 129a is consistent with the air inlet direction of the fresh air inlet 121. This enables the fresh air device 100 to take in fresh air from the back side and out fresh air from the front side, and the connecting pipe is hidden on the back side of the shell 127 to maintain overall consistency.

[0079] In one embodiment, if Figures 7 to 15As shown, the fan 110 is a centrifugal fan 110, the air inlet volute 128 is located on the axial side of the fan 110, and the air outlet volute 129 is located on the radial side of the fan 110. The centrifugal fan 110 has the advantages of small size, low noise, and large air volume. By arranging the air inlet volute 128 on the axial side of the housing 127 located on the fan 110, and the air outlet volute 129 on the radial side of the housing 127 located on the fan 110. The air inlet volute 128 directly corresponds to the air inlet end of the centrifugal fan 110, and the air outlet volute 129 directly corresponds to the air outlet end of the centrifugal fan 110, thereby shortening the air flow path, reducing wind resistance and wind loss, and thus improving the energy efficiency of the entire fresh air device 100. At the same time, since the air outlet volute 129 and the air inlet volute 128 are arranged on two different dimensions of the housing 127, the structure of the entire fresh air device 100 is more compact and occupies less space.

[0080] In combination with the above embodiment with the air outlet volute 129, further, please refer to Figures 12 to 15 、 Figure 21 and Figure 22 The fresh air device 100 also includes an air blocking component 140, which is arranged in the air outlet volute 129 and is located between the fresh air outlet 129a and the air outlet 122, so as to block the air flow from being blown out through the fresh air outlet 129a when the bypass air outlet channel 124 is connected to the fresh air inlet 121, and to allow the air flow to be blown out through the fresh air outlet 129a when the fresh air inlet channel 123 is connected to the fresh air inlet 121.

[0081] It should be noted that the choke assembly 140 is located between the fresh air outlet 129a and the fresh air outlet 129a, and the choke assembly 140 can also be set at the air outlet 122 and the fresh air outlet 129a. The choke assembly 140 can be installed in the air outlet volute 129 by means of a bracket or other structure, or by providing a limiting structure such as a limiting groove in the air outlet volute 129 for the installation of the choke assembly 140. It is understandable that when the fresh air device 100 is in the exhaust mode, the air flow is blown out from the air outlet 122 of the shell 127 into the air outlet volute 129, and returns after being subjected to the resistance of the choke assembly 140 to be blown out through the bypass air outlet channel 124. In order to reduce the backflow stroke of the air flow, it is preferred that the choke assembly 140 is located on the side of the air outlet volute 129 close to the air outlet 122.

[0082] Furthermore, if Figure 13As shown, the wind-blocking assembly 140 includes a filter assembly 141, and the filter assembly 141 extends in the up-down direction, or the filter assembly 141 extends in the horizontal direction. The filter assembly 141 extends in the horizontal direction, that is, the filter assembly 141 is placed horizontally in the air outlet volute 129. The filter assembly 141 extends in the up-down direction, that is, the filter assembly 141 is placed longitudinally in the air outlet volute 129. By arranging the filter assembly 141 in the horizontal direction or in the up-down direction, it is convenient to assemble and disassemble the filter assembly 141, and the wind resistance of the filter assembly 141 is reduced, the air volume is increased and the noise is reduced. In other embodiments, the filter assembly 141 can also be placed obliquely in the air outlet volute 129, and it is only necessary to make all or most of the air flow blown out through the fresh air outlet 129a filtered by the filter assembly 141.

[0083] In one embodiment, please refer to Figures 12 to 15 The filter assembly 141 includes a filter bracket and a filter installed on the filter bracket. A handle is provided on one side of the filter bracket. An operating port 129d is provided on the side wall of the air outlet volute 129 corresponding to the handle. The moving trajectory of the handle taken out from the operating port 129d is set forward.

[0084] In this embodiment, it should be noted that when the fresh air device 100 is in use, the side facing the user is the front, and the side away from the user is the back. The filter can specifically be a HEPA filter, which is arranged corresponding to the air inlet end of the fresh air module to filter dust, debris, etc. in the air entering the air outlet volute 129 from the fresh air inlet 121, so that the air flow blown out from the fresh air outlet 129a is cleaner. The handle of the filter holder is used for the user to grasp so as to remove the filter holder and replace and clean the filter. By providing an operating port 129d corresponding to the handle on the side wall of the air outlet volute 129, the user can grasp the handle through the operating port 129d to remove the filter holder from the side of the air outlet volute 129. The shape and size of the operating port 129d are adapted to the shape and size of the handle so that the filter holder can be removed from the operating port 129d. The handle's forward trajectory when being removed from the operating port 129d means that when the filter holder is removed through the operating port 129d, it is removed from the front side of the fresh air device 100. The filter holder can be made into a straight plate shape, inserted obliquely into the rear panel from the operating port 129d, and tilted backward at the end of the filter holder away from the handle, so that the filter holder can be removed from the front. Alternatively, the filter holder can be made into an arcuate plate shape or a bent plate shape, with the end connected to the handle tilted forward toward the handle, so that the handle's forward trajectory when being removed from the operating port 129d is directed forward, allowing the filter holder to be removed from the front.

[0085] It is understandable that the fresh air device 100 can be set in a floor-standing air conditioner indoor unit or used alone. However, it is usually installed in the corner of a room. Therefore, the space between the side wall of the fresh air device 100 or the floor-standing air conditioner indoor unit and the wall is limited. Moreover, since the operating port 129d is set on the side wall, using the conventional linear removal method, due to insufficient space, it will be very difficult to remove the filter holder. If the filter holder is to be removed smoothly, the entire machine needs to be moved, which brings great inconvenience to the user's operation. However, by setting the moving trajectory of the handle from the operating port 129d to face forward, when the user removes the filter holder from the side of the casing 200, the entire filter holder is removed forward, and the larger space on the side of the machine is not required. The space on the front side of the device is fully utilized, making the removal of the filter holder very convenient and taking up little space.

[0086] Furthermore, the filter holder extends along the length (left-right direction) of the air outlet volute 129 and is arranged in an arc shape, with the concave surface of the filter holder facing forward. By making the filter holder extend in the left-right direction and arranged in an arc shape, it takes up less space than a straight, obliquely inserted filter holder, thereby making the structure within the housing more compact. By placing the concave surface of the filter holder facing forward, the handle is also arranged forward, allowing the filter holder to be removed from the front side of the housing 200.

[0087] In one embodiment, if Figures 7 to 9 、 Figures 13 to 15 As shown, the air outlet volute 129 has a first side wall 129b and a second side wall 129c that are relatively arranged. The first side wall 129b is located on the leeward side of the wind-blocking component 140. In the wind outlet direction of the air outlet volute 129, the first side wall 129b is arranged in an outward convex arc shape, and / or the second side wall 129c is arranged inclined toward the first side wall 129b. It can be understood that the first side wall 129b can be arranged in an outward convex arc shape in its entirety, or only in an outward convex arc shape in its partiality. By making the first side wall 129b in an outward convex arc shape, when the airflow passes through the wind-blocking component 140 and blows toward the first side wall 129b, it can guide the airflow, thereby reducing wind resistance, increasing air volume, and reducing noise. The second side wall 129c is tilted toward the first side wall 129b, and can be fully tilted or partially tilted. By tilting the second side wall 129c toward the first side wall 129b in the air outlet direction of the air outlet volute 129, the airflow can be directed to the wind blocking component 140, thereby reducing the air outlet resistance in the fresh air mode, thereby increasing the air volume and reducing noise.

[0088] In combination with the above-mentioned embodiment having the return air duct 125, further, a return air port 127b connected to the return air duct 125 is provided on the air inlet volute 128 and / or the housing 127, and a return air switch door 132 is rotatably mounted at the return air port 127b to open or close the return air port 127b. The rotation of the return air switch door 132 can be driven by a motor or manually. The return air switch door 132 can be rotatably opened or closed to maintain the overall consistency of the appearance. Switching the return air port 127b on or off by rotation is convenient, fast, easy to implement, and requires little space.

[0089] The present invention also proposes a floor-standing air conditioner indoor unit, please refer to Figures 16 to 22 The floor-standing air-conditioning indoor unit includes a casing 200 and a fresh air device 100 installed in the casing 200. The casing 200 is provided with an air inlet, an air intake and a fresh air outlet 210. The specific structure of the fresh air device 100 refers to the above embodiment. The fresh air inlet 121 of the fresh air device 100 is connected to the outdoors through the air inlet, the return air channel 125 of the fresh air device 100 is connected to the indoor through the air intake, and the air outlet 122 of the fresh air device 100 is connected to the fresh air outlet 210; since this floor-standing air-conditioning indoor unit adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0090] In this embodiment, the casing 200 is extended up and down as a whole. The casing 200 can be composed of a front shell, a rear shell, a base, a top cover, etc. The front shell is composed of one or more pieces, and the front shell is provided with an air-conditioning outlet 122, and a fresh air outlet 210 can also be provided; the rear shell is composed of one or more pieces, and is provided with an air-conditioning return air channel 125, and can also be provided with an air inlet and an air intake. The casing 200 is also provided with indoor heat exchanger components, air-conditioning fan 110 components, control components, air processing modules, etc. The air-conditioning fan 110 components are assembled from one or more of a cross-flow fan 110, a centrifugal fan 110, an axial flow fan 110, and a diagonal flow fan 110. As Figure 21 As shown, when the floor-standing air conditioner indoor unit turns on the fresh air mode, the fresh air device 100 is running, the air valve of the fresh air inlet 121 is opened, the bypass switch door 131 blocks the air flow between the fresh air inlet 121 and the bypass air outlet channel 124, the return air switch door 132 closes the return air channel 125, and the fan 110 is working. At this time, the fan 110 acts as a fresh air fan 110, introducing outdoor fresh air into the fresh air inlet 121 of the fresh air device 100 through the air outlet, entering the fresh air cavity 126 through the fresh air inlet channel 123, and then entering the air outlet volute 129 and being blown out from the air outlet 122, and finally blowing into the room through the fresh air outlet 210 on the casing 200 to realize fresh air supply. Figure 22As shown, when the floor-standing air-conditioning indoor unit turns on the exhaust air mode, the fresh air device 100 is running, the air valve of the fresh air inlet 121 is opened, the bypass switch door 131 blocks the air flow between the fresh air inlet 121 and the fresh air inlet channel 123, the return air switch door 132 opens the return air channel 125, and the fan 110 works. At this time, the fan 110 acts as an exhaust fan 110, and introduces the indoor polluted air into the return air port 127b of the fresh air device 100 through the air intake port. After flowing into the fresh air cavity 126 through the return air channel 125, it enters the bypass air outlet channel 124, and is then blown out to the outside through the fresh air inlet 121, so as to discharge the indoor polluted gas, thereby achieving clean indoor air and improving the user experience.

[0091] In one embodiment, if Figure 16 、 Figure 17 and Figure 22 As shown, the fresh air outlet 210 is provided with a dispersion module 300. The dispersion module 300 is adapted to allow airflow to pass through and diffuse the airflow passing through it. The fresh air outlet 210 can be shaped like an elongated strip, a circle, a rectangle, or the like. To achieve better dispersion, the overall shape of the dispersion module 300 is adapted to the shape of the fresh air outlet 210. The dispersion module 300 is adapted to allow airflow to pass through and diffuse the airflow passing through it. The dispersion module 300 is used to create a diffuse flow pattern for the blown air. That is, after passing through the dispersion module 300, the airflow changes its original flow direction and can flow in different directions, thereby achieving a diffused flow of wind. This results in a softer airflow, creating a windless or breeze-like feeling, and enhancing the user experience. Specifically, the dispersion module 300 includes a mounting plate, on which one or more of swirl blades, a dispersion grille, and a plurality of dispersion holes are provided. The mounting plate extends along the length of the fresh air outlet 210. The swirl blades can be either stationary or dynamic. They disperse and blow out the airflow passing through them, making the airflow softer and more wind-free. The air vents and air holes both disperse and diffuse the airflow, and can also redirect it to varying degrees, preventing direct wind from reaching the body. The swirl blades, air vents, and multiple air holes on the mounting plate can be selected and configured based on actual needs; their combinations are not listed here.

[0092] The present invention also proposes an air conditioner, which includes a floor-standing air-conditioning indoor unit and an air-conditioning outdoor unit connected by a refrigerant pipe. The specific structure of the floor-standing air-conditioning indoor unit refers to the above-mentioned embodiment. Since this air conditioner adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0093] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fresh air device, characterized in that: include: Fan; A volute assembly, wherein a fresh air inlet, an air outlet, a fresh air inlet channel, a bypass air outlet channel, and a fresh air cavity connected to the air outlet are defined within the volute assembly; the fan is installed in the fresh air cavity; the fresh air inlet channel and the bypass air outlet channel are isolated from each other and connected through a gas flow port; the fresh air inlet channel connects the fresh air inlet and the air inlet end of the fresh air cavity; and the bypass air outlet channel connects the fresh air inlet and the air outlet end of the fresh air cavity; as well as A bypass switch door is provided at the gas circulation port, so that either the fresh air inlet channel or the bypass air outlet channel is connected to the fresh air inlet; by providing the bypass switch door at the gas circulation port, it is possible to switch and select whether the fresh air inlet is connected to the bypass air outlet channel or whether the fresh air inlet is connected to the fresh air inlet channel; and a control panel that draws air from the fan to the fan housing, wherein the control panel has a first end connected to the front of the control panel, and the second end connected to the fan housing, wherein the control panel has a first end connected to the front of the control panel, and the second end connected to the fan housing, wherein the control panel has a first end connected to the front of the control panel.

2. The fresh air device according to claim 1, characterized in that: The volute assembly includes a shell and an air inlet volute, the shell defines the fresh air cavity and the bypass air outlet channel; the shell is also provided with an air inlet connected to the fresh air cavity; the air inlet volute cover is arranged at the air inlet of the shell, the air inlet volute is provided with the fresh air inlet, the fresh air inlet channel is defined in the air inlet volute, the bypass air outlet channel is connected to the fresh air inlet through the fresh air inlet channel, and the fresh air inlet channel is connected to the fresh air cavity through the air inlet.

3. The fresh air device according to claim 2, characterized in that: A return air channel is also defined in the shell, and the return air channel connects the indoor air and the air inlet end of the fresh air cavity. The fresh air device also includes a return air switch door, and the return air switch door is installed in the return air channel to open or close the return air channel.

4. The fresh air device according to claim 3, characterized in that: The return air channel is defined in the air inlet volute and / or the housing. The return air channel is connected to the fresh air inlet channel and is connected to the fresh air cavity through the air inlet.

5. The fresh air device according to claim 2, characterized in that: The fan is a centrifugal fan, the air inlet volute is located on an axial side of the fan, and the air outlet volute is located on a radial side of the fan.

6. The fresh air device according to claim 1, characterized in that: The filter assembly includes a filter bracket and a filter installed on the filter bracket. A handle is provided on one side of the filter bracket. An operating port is provided on the side wall of the air outlet volute corresponding to the handle. The moving trajectory of the handle when taken out of the operating port is set forward.

7. The fresh air device according to claim 3, characterized in that: The air inlet volute and / or the housing are provided with a return air port connected to the return air channel, and the return air switch door is rotatably installed at the return air port to open or close the return air port.

8. The fresh air device according to any one of claims 1 to 7, characterized in that: The bypass switch door is rotatably mounted on the volute assembly so that the fresh air inlet channel is communicated with the fresh air inlet, or the bypass air outlet channel is communicated with the fresh air inlet.

9. A floor-standing air conditioner indoor unit, characterized in that: include: A casing, wherein the casing is provided with an air inlet, an air intake and a fresh air outlet; as well as The fresh air device according to any one of claims 1 to 8, wherein the fresh air device is installed in the casing, the fresh air inlet of the fresh air device is connected to the outdoors through the air outlet, and the air outlet of the fresh air device is connected to the fresh air outlet.

10. The floor-standing air conditioner indoor unit according to claim 9, characterized in that: A wind dispersion module is provided at the fresh air outlet, and the wind dispersion module is suitable for allowing air flow to pass through and diffusing the air flow passing through it.

11. An air conditioner, characterized in that: It comprises an air-conditioning outdoor unit and a floor-standing air-conditioning indoor unit as claimed in claim 9 or 10, wherein the air-conditioning outdoor unit is connected to the floor-standing air-conditioning indoor unit via a refrigerant pipe.

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