Fresh air machine

Abstract

The utility model relates to air purification equipment technical field discloses a kind of fresh air machines. The fresh air machine includes casing, air purification module and air filter module. Shell is equipped with return air opening and air supply opening on the casing;First flow channel, second flow channel and third flow channel are formed in the casing;Air purification module is used to purify air;Second flow channel and third flow channel are all provided with air purification module;Air filter module is used to filter air;Third flow channel is also provided with air filter module. Indoor air enters first flow channel, second flow channel and third flow channel from return air opening, and then backflows to indoor from air supply opening. In the utility model, by the design of first flow channel, second flow channel and third flow channel, the fresh air machine can support multiple air treatment paths, and users can select different flow channels according to needs, significantly improving the types of internal circulation mode, solving the problem of single type of internal circulation mode in the prior art fresh air machine.

Description

Technical Field

[0001] This utility model relates to the field of air purification equipment technology, and in particular to a fresh air fan. Background Technology

[0002] A fresh air system is an effective air purification device that circulates indoor air. It expels stale indoor air to the outside while simultaneously processing and introducing fresh outdoor air into the room, ensuring a constant supply of fresh, clean air. Currently, fresh air systems on the market typically come in two types: unidirectional flow and bidirectional flow. Unidirectional flow systems primarily supply air into the room, rapidly introducing fresh air to accelerate air renewal and improve indoor air quality. Bidirectional flow systems achieve both air circulation and heat exchange during ventilation, maintaining a stable indoor temperature and saving energy.

[0003] However, the existing fresh air systems have relatively limited internal circulation modes, making it impossible to implement different internal circulation modes based on indoor air pollution levels. Therefore, how to diversify the types of internal circulation modes is a technical problem that the industry urgently needs to solve. Utility Model Content

[0004] This utility model provides a fresh air ventilator to solve the problem that the types of internal circulation modes in existing fresh air ventilators are relatively limited.

[0005] This utility model provides a new type of air ventilator, comprising: The housing has a return air vent and an air supply vent on its outer shell; a first flow channel, a second flow channel, and a third flow channel are formed inside the housing. An air purification module is disposed in the second flow channel and the third flow channel, and is used to purify the air; An air filtration module is disposed within the third flow channel and is used to filter air; Indoor air enters one of the first flow channel, the second flow channel, and the third flow channel from the return air inlet and then flows back into the room from the supply air outlet.

[0006] According to the fresh air unit provided by this utility model, the housing includes: The first housing has an internal return air channel and a supply air channel; the return air channel has a return air inlet and a return air outlet, and the supply air channel has a supply air inlet and a supply air inlet; a first air door is provided on the channel wall of the return air channel, and the return air channel is connected to the supply air channel through the first air door to form the first flow channel; a first damper is installed at the first air door.

[0007] According to the fresh air unit provided by this utility model, the housing further includes: The second housing is disposed on one side of the first housing; a first air intake channel is formed inside the second housing; a second air inlet is also provided on the channel wall of the return air channel, and a second air damper is provided at the second air inlet; the return air channel is connected to the air supply channel in sequence through the second air inlet, the first air intake channel, and the air supply inlet to form the second flow channel.

[0008] According to the fresh air unit provided by this utility model, the air purification module is installed at the second air inlet and / or the air supply inlet.

[0009] According to the fresh air unit provided by this utility model, the housing further includes: A third housing is disposed on the side of the second housing away from the first housing; a fresh air channel is formed inside the third housing; the fresh air channel has a fresh air inlet and a fresh air outlet; a third air inlet is provided on the channel wall of the fresh air channel, and a third air door is installed at the third air inlet; The second housing also contains a second drainage channel and a third drainage channel; The return air duct is sequentially connected to the return air outlet, the second diversion duct, the third air inlet, the fresh air duct, the fresh air outlet, the third diversion duct, the first diversion duct, and the air supply inlet, and is connected to the air supply duct to form the third flow channel.

[0010] According to the fresh air ventilator provided by this utility model, the second air intake channel and / or the third air intake channel are provided with the air filtration module.

[0011] The fresh air unit provided by this utility model also includes: A heat exchange core is installed inside the second housing to divide the inner cavity of the second housing into a first chamber, a second chamber, a third chamber, and a fourth chamber; the heat exchange core includes a second heat exchange channel and a third heat exchange channel; The first chamber is connected to the second air inlet, the second chamber is connected to the third air inlet, the third chamber is connected to the fresh air outlet, and the fourth chamber is connected to the return air outlet; The first chamber is the first drainage channel; the fourth chamber, the second heat exchange channel, and the second chamber form the second drainage channel; the third chamber and the third heat exchange channel form the third drainage channel.

[0012] According to the fresh air ventilator provided by this utility model, the air inlet end of the second heat exchange channel and / or the air inlet end of the second heat exchange channel are both provided with the air filtration module.

[0013] According to the fresh air system provided by this utility model, the air purification module includes: An air purification component is used to purify air; the air purification component is provided in both the second flow channel and the third flow channel. An air filter element is used to filter air; the air filter element is disposed on one side of the air purifier.

[0014] According to the fresh air purifier provided by this utility model, the air filtration module is a filter screen.

[0015] The new air ventilator provided by this utility model features a first, second, and third flow channel within its casing. Air purification modules are installed in the second and third flow channels, and an air filtration module is installed in the third flow channel. When indoor air enters the first flow channel from the return air vent, it flows back into the room through the supply air vent, thus improving indoor air circulation. When indoor air enters the second flow channel from the return air vent, it passes through the air purification module, achieving purification before flowing back into the room through the supply air vent. When indoor air enters the third flow channel from the return air vent, it passes through both the air purification and air filtration modules, achieving purification and filtration before flowing back into the room through the supply air vent. Therefore, the design of the first, second, and third flow channels allows the air ventilator to support multiple air handling paths, enabling users to select different flow channels according to their needs, significantly increasing the variety of internal circulation modes. The second and third airflow channels (containing both air purification and air filtration modules) provide different levels of air handling capabilities to meet diverse needs, from basic purification to high-efficiency filtration. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is one of the three-dimensional structural schematic diagrams of the fresh air unit provided by this utility model.

[0018] Figure 2 yes Figure 1 A schematic diagram of the structure of section AA.

[0019] Figure 3 This is the second schematic diagram of the three-dimensional structure of the fresh air unit provided by this utility model.

[0020] Figure 4 This is one of the internal circulation modes of the fresh air unit provided by this utility model.

[0021] Figure 5 This is the second internal circulation mode of the fresh air ventilator provided by this utility model.

[0022] Figure 6 This is the third internal circulation mode of the fresh air ventilator provided by this utility model.

[0023] Figure label: 100. Housing; 101. Return air vent; 102. Supply air vent; 103. Fresh air vent; 104. Exhaust air vent; 110. First housing; 120. Second housing; 130. Third housing; 140. First partition plate; 150. Second partition plate; 160. Return air cover; 170. Fresh air cover; 111. First damper; 112. Second damper; 121. First chamber; 122. Second chamber; 123. Third chamber; 124. Fourth chamber; 125. Bypass duct; 131. Third damper; 200. Air purification module; 300. Air filtration module; 400. Heat exchange core; 500. First wind turbine; 600. Second fan. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this specification, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing this specification. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this specification. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this specification, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0027] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this specification. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0029] In the embodiments of this specification, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0030] The following is combined Figures 1 to 6 The present invention provides a description of the fresh air unit.

[0031] like Figure 1 , Figure 2 and 3 As shown in the figure, a specific embodiment of this utility model provides a fresh air ventilator. The fresh air ventilator includes a housing 100, an air purification module 200, and an air filtration module 300.

[0032] The housing 100 has a return air vent 101 and an air supply vent 102 on its casing. A first flow channel, a second flow channel, and a third flow channel are formed inside the housing 100. An air purification module 200 is used to purify the air. Air purification modules 200 are installed in both the second and third flow channels. An air filter module 300 is used to filter the air. An air filter module 300 is also installed in the third flow channel. Indoor air enters one of the first, second, or third flow channels through the return air vent 101 and then flows back into the room through the air supply vent 102.

[0033] In this embodiment, a first flow channel, a second flow channel, and a third flow channel are provided within the casing 100. Air purification modules 200 are installed in both the second and third flow channels, and an air filtration module 300 is installed in the third flow channel. When indoor air enters the first flow channel from the return air vent 101, it flows back into the room through the supply air vent 102, thus improving indoor air circulation. When indoor air enters the second flow channel from the return air vent 101, it passes through the air purification module 200, achieving air purification. The purified indoor air then flows back into the room through the supply air vent 102, achieving the purpose of purifying indoor air. When indoor air enters the third flow channel from the return air vent 101, it passes through both the air purification module 200 and the air filtration module 300, achieving both air purification and filtration. The purified and filtered indoor air then flows back into the room through the supply air vent 102, achieving the purpose of purifying and filtration of indoor air. Thus, the design of the first, second, and third airflow channels enables the fresh air system to support multiple air handling paths. Users can select different channels to operate according to their needs, significantly increasing the variety of internal circulation modes. The second airflow channel (which houses the air purification module 200) and the third airflow channel (which houses both the air purification module 200 and the air filtration module 300) provide different levels of air handling capabilities, meeting diverse needs from basic purification to high-efficiency filtration.

[0034] When it is necessary to accelerate indoor air circulation, indoor air can be allowed to enter the first flow channel from the return air vent 101 and then be discharged from the supply air vent 102.

[0035] When indoor air needs to be purified, indoor air can be allowed to enter the second flow channel from the return air vent 101 and then be discharged from the supply air vent 102.

[0036] When it is necessary to purify and filter indoor air, indoor air can be allowed to enter the third flow channel from the return air vent 101 and then be discharged from the supply air vent 102.

[0037] In some embodiments of this utility model, the housing 100 includes a first housing 110; the first housing 110 has a return air channel and a supply air channel formed inside; the return air channel has a return air inlet 101 and a return air outlet, and the supply air channel has a supply air inlet 102 and a supply air inlet; a first air door is provided on the channel wall of the return air channel, and the return air channel is connected to the supply air channel through the first air door to form a first flow channel; a first air damper 111 is installed at the first air door.

[0038] In this embodiment, the first airflow channel directly connects the return air channel and the supply air channel through the first air inlet, forming a shorter air path. When rapid circulation of indoor air is required, opening the first air inlet 111 and the first fan 500 installed in the supply air channel achieves low-energy, high-efficiency airflow circulation, avoiding increased wind resistance due to indoor air passing through the air purification module 200 and air filter module 300, and reducing the load on the first fan 500. The opening and closing of the first air inlet 111 can independently control the start and stop of the first airflow channel, physically isolating it from other airflow channels. For example, when indoor air does not need to pass through the air purification module 200 and air filter module 300, the first air inlet 111 can be opened; when indoor air needs to pass through the air purification module 200 or air filter module 300, the first air inlet 111 can be closed. The return air channel and the supply air channel are horizontally connected through the first air inlet, eliminating the need for additional independent ducts, saving internal space in the casing 100, and enabling the multi-channel structure to be implemented within a limited volume. The first flow path directly utilizes the existing return / supply air duct layout, reducing bends or branching structures and lowering airflow noise and pressure loss.

[0039] like Figure 4 As shown, when the indoor air does not need to pass through the air purification module 200 and the air filter module 300, the first air damper 111 opens, and the indoor air enters the return air duct from the return air inlet 101, then enters the supply air duct through the first air door, and finally flows back into the room from the supply air inlet 102.

[0040] Optionally, the return air duct and the supply air duct are arranged side by side along the vertical direction of the casing 100. A first fan 500 is also installed in the supply air duct; the exhaust port of the first fan 500 faces the air supply port 102, and the air inlet of the first fan 500 is connected to the air supply inlet.

[0041] Optionally, the first fan 500 is a volute fan.

[0042] In some embodiments of this utility model, the housing 100 further includes a second housing 120. The second housing 120 is disposed on one side of the first housing 110; a first air intake channel is formed inside the second housing 120; a second air inlet is also provided on the channel wall of the return air channel, and a second air damper 112 is provided at the second air inlet; the return air channel is connected to the air supply channel in sequence through the second air inlet, the first air intake channel, and the air supply inlet to form a second flow channel.

[0043] In this embodiment, when indoor air purification is required, the first damper 111 is closed and the second damper 112 is opened. Indoor air enters the return air duct from the return air inlet 101, then passes sequentially through the second damper, the first diversion duct, and the supply air inlet into the supply air duct, and finally flows back into the room from the supply air inlet 102. Figure 5 As shown. The second flow channel is dedicated to the air purification module 200, forming a functional hierarchy with the first and third flow channels to achieve multi-mode indoor air circulation. The second flow channel is physically isolated from the first flow channel to ensure that unpurified air does not mix into the supply air. The second housing 120 is arranged side by side with the first housing 110 and connected through the first airflow channel to avoid internal pipe crossing and reduce air resistance. The start and stop of the second flow channel can be precisely controlled by opening and closing the second damper 112.

[0044] Optionally, along the left-right direction of the housing 100, the second housing 120 is arranged on one side of the first housing 110.

[0045] Optionally, an air purification module 200 may be installed at the second air inlet and / or the air supply inlet. This ensures that indoor air within the second airflow channel can pass through the air purification module 200, thereby purifying the indoor air.

[0046] Preferably, air purification modules 200 are installed at both the second air inlet and the air supply inlet to achieve two-stage purification of indoor air and ensure purification effect.

[0047] In some embodiments of this utility model, the housing 100 further includes a third housing 130; the third housing 130 is disposed on the side of the second housing 120 away from the first housing 110; a fresh air duct is formed inside the third housing 130; the fresh air duct has a fresh air inlet 103 and a fresh air outlet; a third air inlet is opened on the duct wall of the fresh air duct, and a third air damper 131 is installed at the third air inlet. A second diversion duct and a third diversion duct are also formed inside the second housing 120; the return air duct is connected to the air supply duct in sequence through the return air outlet, the second diversion duct, the third air inlet, the fresh air duct, the fresh air outlet, the third diversion duct, the first diversion duct, and the air supply inlet to form a third flow channel.

[0048] In this embodiment, the fourth damper at the fresh air inlet 103 is closed, the first damper 111 and the second damper 112 are both closed, and the third damper 131 is open. Indoor air enters the return air duct from the return air inlet 101, and then sequentially passes through the return air outlet, the second diversion duct, the third damper, the fresh air duct, the fresh air outlet, the third diversion duct, the first diversion duct, and the supply air inlet before entering the supply air duct. Finally, it flows back into the room from the supply air outlet 102, thus achieving the purification and filtration of indoor air. Figure 6 As shown. At this point, the second and third flow channels share the first air intake channel, allowing for the reuse of the air purification module 200, reducing the number of air purification modules 200 required, and lowering the material cost of the fresh air unit. Additionally, closing the fourth damper at the fresh air inlet 103 prevents outdoor air from entering the room. By setting up the second and third air intake channels, airflow can be guided, reducing turbulence.

[0049] Optionally, along the left-right direction of the housing 100, the first housing 110 is arranged on the right side of the second housing 120, and the third housing 130 is arranged on the left side of the second housing 120.

[0050] Optionally, an exhaust duct is also formed within the third housing 130; the exhaust duct has an exhaust port 104 and an exhaust inlet; a fifth damper is provided at the exhaust port 104, which is used to open or close the exhaust port 104. A second fan 600 is installed within the exhaust duct.

[0051] Optionally, the exhaust port of the second fan 600 faces the exhaust port 104, and the intake port of the second fan 600 is connected to the second chamber 122.

[0052] Optionally, the second fan 600 is a volute fan.

[0053] Optionally, an air filtration module 300 is installed on the second and / or third air intake channels to filter indoor air.

[0054] Preferably, both the second and third air intake channels are equipped with air filtration modules 300 to achieve dual filtration of indoor air.

[0055] like Figure 2 and Figure 3As shown, in some embodiments of this utility model, the fresh air unit further includes a heat exchange core 400; the heat exchange core 400 is installed inside the second housing 120 and is used to divide the inner cavity of the second housing 120 into a first chamber 121, a second chamber 122, a third chamber 123, and a fourth chamber 124; the heat exchange core 400 includes a second heat exchange channel and a third heat exchange channel. The first chamber 121 is connected to the second air inlet, the second chamber 122 is connected to the third air inlet, the third chamber 123 is connected to the fresh air outlet, and the fourth chamber 124 is connected to the return air outlet; the first chamber 121 is the first drainage channel; the fourth chamber 124, the second heat exchange channel, and the second chamber 122 form the second drainage channel; the third chamber 123 and the third heat exchange channel form the third drainage channel.

[0056] In this embodiment, the heat exchange core 400 enables air heat exchange. With the fourth, fifth, first, and third air dampers 111 and 131 all closed, and the second damper 112 open, indoor air enters the return air duct from the return air inlet 101, then sequentially passes through the second air damper, air purification module 200, first chamber 121, air purification module 200, and air supply inlet into the supply air duct; finally, it flows back into the room from the air supply outlet 102. Figure 5 As shown. With the fourth, fifth, first, and second air dampers (111 and 112) all closed, and the third damper (131) open, indoor air enters the return air duct from the return air inlet (101), then sequentially passes through the return air outlet, fourth chamber (124), second heat exchange duct, second chamber (122), third air damper, fresh air duct, fresh air outlet, third chamber (123), third heat exchange duct, first air diversion duct, and supply air inlet before entering the supply air duct. Finally, it flows back into the room from the supply air outlet (102), thus purifying and filtering the indoor air. Figure 6 As shown. This embodiment innovatively integrates the heat exchange core 400 with a multi-chamber flow channel, enabling simultaneous heat recovery and air processing, achieving multi-functional integration, and facilitating the miniaturization of the entire machine.

[0057] Optionally, an air filter module 300 may be provided at the air inlet end of the second heat exchange channel and / or the air inlet end of the third heat exchange channel. The air filter module 300 can be installed in the fourth chamber 124 and the third chamber 123 to achieve efficient space utilization.

[0058] Preferably, the heat exchange core 400 has a rhomboid cross-section, and the air inlet ends of the second heat exchange channel and the third heat exchange channel are both arranged on the lower side of the heat exchange core 400; the air outlet ends of the second heat exchange channel and the third heat exchange channel are both arranged on the upper side of the heat exchange core 400, and the air filter module 300 is attached to the lower side of the heat exchange core 400.

[0059] like Figure 3As shown, optionally, the air purification module 200 is located on the side of the heat exchange core 400 near the first housing 110, and the air purification module 200 is located within the first chamber 121. The air purification module 200 extends along the vertical direction of the housing 100.

[0060] like Figure 3 As shown, in some embodiments of this utility model, a sixth air inlet is provided on the wall of the fresh air duct, and a sixth air damper is installed at the sixth air inlet; a bypass channel 125 is formed inside the second housing 120, one end of the bypass channel 125 is connected to the fresh air duct through the sixth air inlet, and the other end of the bypass channel 125 is connected to the return air duct through the second air inlet. When it is necessary to introduce fresh air into the room without heat exchange, the sixth air damper, the fourth air damper, the fifth air damper and the second air damper can be opened, while the third air damper 131 and the first air damper 111 are closed. Outdoor fresh air enters the fresh air duct from the fresh air inlet 103, and then passes through the sixth air inlet, the bypass channel 125 and the second air inlet in sequence to enter the return air duct, and finally enters the room from the return air inlet 101.

[0061] In some embodiments of this utility model, the air purification module 200 includes an air purification component and an air filter component; the air purification component is used to purify the air; air purification components are disposed in both the second and third flow channels; the air filter component is used to filter the air; and an air filter component is disposed on one side of the air purification component. This achieves air purification and air filtration simultaneously.

[0062] Optionally, the air purification component is activated carbon. The air filter component is a filter screen.

[0063] In some embodiments of this invention, the air filter module 300 is a filter screen. The filter screen is installed on the lower side of the heat exchange core 400.

[0064] For example, the housing 100 includes a front side panel, a rear side panel, a left side panel, a right side panel, an upper side panel, and a lower side panel; the front side panel, rear side panel, left side panel, right side panel, upper side panel, and lower side panel enclose an installation cavity; a fresh air inlet 103 and an exhaust air outlet 104 are provided on the left side panel, a fourth damper is installed at the fresh air inlet 103, and a fifth damper is installed at the exhaust air outlet 104; a return air inlet 101 and a supply air outlet 102 are provided on the right side panel.

[0065] like Figure 2 and Figure 3As shown, the housing 100 also includes a first partition plate 140 and a second partition plate 150; the first partition plate 140 and the second partition plate 150 are arranged at intervals in the left-right direction to divide the mounting cavity into a left chamber, a middle chamber, and a right chamber; the lower ends of the first partition plate 140 and the second partition plate 150 abut against the lower side plate, the front side of the first partition plate 140 abuts against the front side plate, and the rear side of the first partition plate 140 and the second partition plate 150 abut against the rear side plate. The first partition plate 140, the left side plate, the left section of the upper side plate, the left section of the lower side plate, the left section of the front side plate, and the left section of the rear side plate enclose to form a third housing 130. The first partition plate 140, the middle section of the upper side plate, the middle section of the lower side plate, the middle section of the front side plate, the middle section of the rear side plate, and the second partition plate 150 enclose to form a second housing 120. The second partition plate 150, the right side plate, the right section of the upper side plate, the right section of the lower side plate, the right section of the front side plate, and the right section of the rear side plate together form the first shell 110.

[0066] The air purification module 200 is rectangular in shape and includes activated carbon, with a filter screen wrapped around the activated carbon. The lower side of the air purification module 200 abuts against the lower side plate, the upper side of the air purification module 200 abuts against the upper side plate, the rear side of the air purification module 200 abuts against the front side of the second partition plate, and the front side of the air purification module 200 abuts against the front side plate.

[0067] The housing 100 also includes a return air cover 160, which is located in the right chamber and, together with the rear and right side panels of the housing 100, forms a return air channel; the remaining right chamber is an air supply channel. The right end of the return air channel is a return air inlet 101, and a return air outlet is located on the left side of the return air cover 160. A first air inlet is also located on the top of the return air cover 160, communicating with the air supply channel. A second air inlet is also located on the return air cover 160, above the return air outlet. A first fan 500 is installed within the air supply channel.

[0068] The housing 100 also includes a fresh air cover 170; the fresh air cover 170 is located in the left chamber and, together with the rear side panel and the left side panel, forms a fresh air duct, with the remaining left chamber serving as an exhaust duct. A third air inlet is provided on the fresh air cover 170, which connects the fresh air duct and the middle chamber. One end of the exhaust duct is connected to the exhaust port 104, and a second fan 600 is installed within the exhaust duct.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fresh air ventilator, characterized in that, include: The housing (100) has a return air inlet (101) and an air supply inlet (102) on its shell; a first flow channel, a second flow channel and a third flow channel are formed inside the housing (100); An air purification module (200) is disposed in the second flow channel and the third flow channel for purifying air; An air filtration module (300) is disposed within the third flow channel and is used to filter air; Indoor air enters one of the first flow channel, the second flow channel and the third flow channel from the return air inlet (101) and then flows back into the room from the air supply outlet (102).

2. The fresh air system according to claim 1, characterized in that, The housing (100) includes: The first housing (110) has a return air channel and a supply air channel inside; the return air channel has the return air inlet (101) and the return air outlet, and the supply air channel has the supply air inlet (102) and the supply air inlet; a first air door is provided on the channel wall of the return air channel, and the return air channel is connected to the supply air channel through the first air door to form the first flow channel; a first air damper (111) is installed at the first air door.

3. The fresh air system according to claim 2, characterized in that, The housing (100) also includes: The second housing (120) is disposed on one side of the first housing (110); a first air intake channel is formed inside the second housing (120); a second air inlet is also provided on the channel wall of the return air channel, and a second air door (112) is provided at the second air inlet; the return air channel is connected to the air supply channel in sequence through the second air inlet, the first air intake channel, and the air supply inlet to form the second flow channel.

4. The fresh air system according to claim 3, characterized in that, The air purification module (200) is installed at the second air inlet and / or the air supply inlet.

5. The fresh air system according to claim 3, characterized in that, The housing (100) also includes: The third housing (130) is disposed on the side of the second housing (120) away from the first housing (110); a fresh air channel is formed inside the third housing (130); the fresh air channel has a fresh air inlet (103) and a fresh air outlet; a third air door is opened on the channel wall of the fresh air channel, and a third air door (131) is installed at the third air door. The second housing (120) also contains a second drainage channel and a third drainage channel; The return air duct is sequentially connected to the return air outlet, the second diversion duct, the third air inlet, the fresh air duct, the fresh air outlet, the third diversion duct, the first diversion duct, and the air supply inlet, and is connected to the air supply duct to form the third flow channel.

6. The fresh air system according to claim 5, characterized in that, The air filter module (300) is provided on the second drainage channel and / or the third drainage channel.

7. The fresh air system according to claim 5, characterized in that, Also includes: A heat exchange core (400) is installed inside the second housing (120) to divide the inner cavity of the second housing (120) into a first chamber (121), a second chamber (122), a third chamber (123) and a fourth chamber (124); the heat exchange core (400) includes a second heat exchange channel and a third heat exchange channel; The first chamber (121) is connected to the second air inlet, the second chamber (122) is connected to the third air inlet, the third chamber (123) is connected to the fresh air outlet, and the fourth chamber (124) is connected to the return air outlet. The first chamber (121) is the first drainage channel; the fourth chamber (124), the second heat exchange channel and the second chamber (122) form the second drainage channel; the third chamber (123) and the third heat exchange channel form the third drainage channel.

8. The fresh air unit according to claim 7, characterized in that, The air inlet end of the second heat exchange channel and / or the air inlet end of the third heat exchange channel are provided with the air filter module (300).

9. The fresh air system according to claim 1, characterized in that, The air purification module (200) includes: An air purification component is used to purify air; the air purification component is provided in both the second flow channel and the third flow channel. An air filter element is used to filter air; the air filter element is disposed on one side of the air purifier.

10. The fresh air unit according to any one of claims 1 to 9, characterized in that, The air filtration module (300) is a filter screen.

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