Fresh air pipe and air handling unit

Abstract

The utility model relates to the technical field of fresh air pipelines, and discloses a fresh air pipe and an air handling unit. The fresh air pipe comprises a first pipeline and a second pipeline, wherein the cross section of the first pipeline is centrosymmetric; the air cap is arranged at a first port of the first pipeline, the first port is suitable for being communicated with the outside, the air cap is provided with a first end part and a second end part, and the second end part is connected with the first pipeline; wherein the first end portion is coiled in a spiral shape, and the spiral diameter of the first end portion is gradually reduced in the direction away from the pipeline. The cross section of the first pipeline is in a centrosymmetric shape, so that uniform distribution and efficient flowing of airflow are ensured, and turbulent flow and energy loss are reduced. The first end of the hood is spirally arranged on the outer side of the first port of the first pipeline, so that external airflow can be effectively guided to enter the first pipeline, meanwhile, foreign matter or rainwater is prevented from directly entering the first pipeline, and the protection performance of the first pipeline is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fresh air pipeline, for example, to a fresh air pipe and an air handling unit. BACKGROUND

[0002] At present, the air tightness of buildings in the industry is getting higher and higher, and people live in the room for a long time, resulting in more and more indoor turbidity, including formaldehyde, CO2, peculiar smell, dust, etc.

[0003] The device with fresh air function in the related art can provide fresh air function, which is achieved by introducing outdoor air into the room through a fan or introducing indoor turbid air to the outdoor through a fresh air pipe, thereby improving the air quality in the room. The device with fresh air function is connected with the outside through the fresh air pipe, and the port of the fresh air pipe connected with the outside is generally provided with a wind cap, which is generally in the form of a grid and is installed in the fresh air pipe.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

[0005] In the related art, the pipe head wind cap of the fresh air pipe has large resistance, and the pipe body has large resistance, which further leads to the unsmoothness of the fresh air pipe in and out, affecting the air volume.

[0006] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those skilled in the art. CONTENT OF THE UTILITY MODEL

[0007] In order to have a basic understanding of some aspects of the disclosed embodiments, the following is a simple summary. The summary is not a general review, nor is it intended to determine the key / important elements or delineate the scope of protection of these embodiments, but as a prelude to the detailed description below.

[0008] The embodiments of the present disclosure provide a fresh air pipe and an air handling unit to reduce the resistance of the fresh air pipe and improve the smoothness of the fresh air in and out.

[0009] The embodiments of the present disclosure provide a fresh air pipe, which comprises: a first pipeline, the cross section of which is in a center-symmetrical shape; a wind cap provided at a first port of the first pipeline, the first port being adapted to be connected with the outside, the wind cap having a first end and a second end, the second end being connected with the first pipeline; wherein the first end is spirally coiled, and the spiral diameter of the first end gradually decreases in the direction away from the pipeline.

[0010] Optionally, the cross section of the first pipeline is in the shape of an ellipse.

[0011] Optionally, the helical diameter of the first end portion gradually decreases in a direction away from the first pipeline, forming a tapered portion, and a tip of the tapered portion is located on an extension line of the central axis of the first pipeline.

[0012] Optionally, the first end portion protrudes from the first port; and / or, the helical pitch of the first end portion is uniformly arranged.

[0013] Optionally, the second end portion is helically arranged outside the first pipeline.

[0014] Optionally, the fresh air pipe further comprises a fixing device attached to an outer side of the second end portion, for fixing the second end portion.

[0015] Optionally, the first pipeline is made of hard polymer material; and / or, an equivalent circular tube diameter of the first pipeline is greater than or equal to 37 mm.

[0016] Optionally, the first pipeline is adapted to be installed through a foundation, and the first pipeline further comprises a second port arranged opposite to the first port, and the fresh air pipe further comprises a second pipeline, one end of the second pipeline being adapted to be detachably connected with the second port, and the other end of the second pipeline being used to communicate with a fresh air inlet or a turbid air outlet of the air handling unit.

[0017] The embodiments of the present disclosure further provide an air handling unit, comprising: a device body comprising a shell and a fan, the fan being located in the shell, and the shell being provided with a fresh air inlet or a turbid air outlet; and the fresh air pipe according to any one of the above embodiments, the inlet end of the fresh air pipe being in communication with the fresh air inlet or the turbid air outlet.

[0018] Optionally, the fresh air pipe comprises a fresh air outlet pipe, the fresh air outlet pipe being in communication with the turbid air outlet, wherein an inner wall surface of the turbid air outlet is configured with an internal thread, an outer wall surface of the fresh air outlet pipe is configured with an external thread, and the fresh air outlet pipe is threadedly connected with the turbid air outlet; and / or, the fresh air pipe comprises a fresh air inlet pipe, the fresh air inlet pipe being in communication with the fresh air inlet, and the air handling unit further comprises a connecting pipeline, one end of the connecting pipeline being threadedly connected with the fresh air inlet pipe, and the other end of the connecting pipeline being detachably connected with the fresh air inlet.

[0019] The fresh air pipe and the air handling unit provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] The first port of the first pipeline of the fresh air pipe provided by the embodiment of the present disclosure is in communication with the outside world, and is used for air inlet or air outlet. The cross section of the first pipeline is in a central symmetric shape, so as to ensure uniform distribution and efficient flow of air flow, reduce turbulence and energy loss. The first end of the air cap is spirally arranged at the first port of the first pipeline, so as to effectively guide the external air flow into the first pipeline, prevent foreign matters or rainwater from directly entering, and improve the protection performance of the first pipeline. The spiral structure can also generate a certain centrifugal effect when the air flow enters, help to separate particulate matters in the air flow, improve air quality, and the spiral structure can improve the smoothness of the air flow, reduce resistance, improve the smoothness of air inlet and outlet of the fresh air pipe, and ensure the air volume. In addition, the second end of the air cap is tightly connected with the first pipeline, so as to ensure the stability and sealing performance of the structure and reduce the air leakage phenomenon. The fresh air pipe provided by the embodiment of the present disclosure not only optimizes the flow efficiency of the air flow, but also enhances the durability and applicability of the fresh air pipe.

[0021] The foregoing general description and the following description are only exemplary and explanatory, and are not used to limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] One or more embodiments are exemplarily illustrated by corresponding drawings, which do not constitute limitation on the embodiments, elements with the same reference numerals in the drawings are shown as similar elements, the drawings do not constitute proportional limitation, and wherein:

[0023] Figure 1 is a cooperation structure schematic diagram of a fresh air pipe and a mounting base provided by the embodiment of the present disclosure;

[0024] Figure 2 is a partial structure schematic diagram of a fresh air pipe provided by the embodiment of the present disclosure;

[0025] Figure 3 is a partial structure schematic diagram of another fresh air pipe provided by the embodiment of the present disclosure;

[0026] Figure 4 is a partial structure schematic diagram of another fresh air pipe provided by the embodiment of the present disclosure;

[0027] Figure 5 is a partial structure schematic diagram of a second pipeline provided by the embodiment of the present disclosure;

[0028] Figure 6 is a partial structure schematic diagram of another fresh air pipe provided by the embodiment of the present disclosure;

[0029] Figure 7 is a structure schematic diagram of a fresh air pipe provided by the embodiment of the present disclosure;

[0030] Figure 8is a cooperation structure schematic diagram of a fresh air pipe and an integrated pipeline provided by an embodiment of the present disclosure;

[0031] Figure 9 is a structure schematic diagram of an air handling unit provided by an embodiment of the present disclosure;

[0032] Figure 10 is a partial structure schematic diagram of an air handling unit provided by an embodiment of the present disclosure;

[0033] Figure 11 is a partial structure schematic diagram of another air handling unit provided by an embodiment of the present disclosure;

[0034] Figure 12 is a cross-sectional structure schematic diagram of an air handling unit provided by an embodiment of the present disclosure;

[0035] Figure 13 is a partial structure schematic diagram of another air handling unit provided by an embodiment of the present disclosure;

[0036] Figure 14 is a partial structure schematic diagram of another air handling unit provided by an embodiment of the present disclosure;

[0037] Figure 15 is a partial structure schematic diagram of another air handling unit provided by an embodiment of the present disclosure.

[0038] Reference signs:

[0039] 10, shell; 101, fresh air inlet; 102, first indoor outlet; 103, first turbid air inlet; 104, second indoor outlet; 105, turbid air outlet; 201, first fan; 202, second fan; 203, first purification device; 204, second purification device; 205, fan motor; 30, anti-backflow plate; 40, inner purification plate; 501, second air outlet shell; 502, third air outlet shell; 503, conversion shell; 60, outer shell; 601, heat exchange air inlet; 701, fresh air inlet pipe; 702, fresh air outlet pipe; 703, connecting pipeline; 704, limiting column; 705, limiting groove; 90, fresh air pipe; 91, first pipeline; 911, first port; 92, second pipeline; 921, threaded hose; 922, thermal insulation layer; 93, air cap; 931, first end portion; 932, second end portion; 94, fixing device; 95, integrated pipeline; 951, thick copper pipe; 952, thin copper pipe; 953, drain pipe; 954, online line; 96, foam; 100, installation base; 11, reserved hole. DETAILED DESCRIPTION

[0040] In order to enable a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure is described in detail below with reference to the accompanying drawings, which are for reference only and do not limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, a plurality of details are provided to provide a sufficient understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be simplified to facilitate the drawings.

[0041] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances in order to describe the embodiments of the present disclosure herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0042] In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "back", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned part of the term can also be used to represent other meanings, for example, the term "upper" can also be used to represent a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0043] In addition, the terms "set", "connected", "fixed" should be broadly understood. For example, "connected" can be fixedly connected, detachably connected, or integrally configured; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0044] Unless otherwise specified, the term "a plurality of" means two or more.

[0045] The term "and / or" is a description of the association relationship of the object, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, the three relationships.

[0046] It should be noted that the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0047] In combination Figures 1 to 15 As shown in the drawings, the embodiment of the present disclosure provides a fresh air pipe 90, which comprises a first pipe 91 and a cap 93, the cross section of the first pipe 91 is a central symmetric shape; the cap 93 is arranged at a first port 911 of the first pipe 91, the first port 911 is adapted to communicate with the outside, the cap 93 has a first end 931 and a second end 932, the second end 932 is connected with the first pipe 91; wherein the first end 931 is spirally coiled, and the spiral diameter of the first end 931 gradually decreases in the direction away from the pipe. Figures 2 to 3

[0048] In the embodiment of the present disclosure, the first pipe 91 of the fresh air pipe 90 communicates with the outside, that is, the first port 911 of the first pipe is used for the fresh air to flow into or out of the indoor turbid air, the cross section of the first pipe 91 is a central symmetric shape, so that the air inlet and outlet of the first pipe 91 is more uniform, and the airflow velocity in the first pipe 91 is also more uniform, which improves the flow rate of the airflow, reduces the resistance, and improves the air volume. The first end 931 is spirally coiled, and the spiral diameter of the first end 931 gradually decreases in the direction away from the pipe, so that the airflow can be guided to flow into the first pipe 91, the smoothness of the airflow is improved, the air volume loss is reduced, and the spiral cap 93 can filter the impurities such as particulate matters in the airflow to avoid the blockage of the fresh air pipe 90.

[0049] Optionally, the cap 93 is a metal wire. In order to facilitate the processing and installation of the cap.

[0050] Optionally, the cross section of the first pipe 91 is an oval shape. The oval shape is a central symmetric figure which is mutually symmetric on the major axis and the minor axis, so that the space occupied by the first pipe 91 can be reduced, the air inlet smoothness of the first pipe 91 can be further improved, the air resistance can be reduced, the air volume can be improved, the airflow uniformity can be improved, and the oval structure is more smooth, which facilitates the airflow flow and reduces the airflow loss.

[0051] Optionally, the spiral diameter of the first end 931 gradually decreases in the direction away from the first pipe 91 to form a tapered portion, and the tip of the tapered portion is located on the extension line of the central axis of the first pipe 91. That is, the first end 931 is a spiral tapered structure.

[0052] In the embodiment of the present disclosure, the tip of the first end 931 is located on the central axis of the first pipe 91, so that the spiral first end 931 can uniformly guide the airflow into the first pipe 91, and the uniformity of the air inlet and outlet is further improved. In addition, the centrifugal force can be generated at the center of the first pipe 91, and the impurities of the first port 911 can be uniformly filtered to avoid uneven filtering.

[0053] ​Optionally, the first end portion 931 protrudes from the first port 911. In this way, the installation of the air cap 93 is facilitated, and a guiding effect can be provided outside the first port 911 to make the airflow flowing into the first pipeline 91 more smooth and uniform.

[0054] Optionally, the helical intervals of the first end portion 931 are uniformly arranged. In this way, the airflow can be smoothly and uniformly guided into the first pipeline 91, reducing the turbulence and energy loss of the airflow and improving the flow efficiency of the airflow. In addition, the uniform helical structure can also enhance the mechanical strength and stability of the air cap 93, so that it can still maintain good protection performance in harsh weather conditions (such as strong wind or heavy rain) and prevent foreign matter or rain from directly entering the pipeline. In addition, the uniform helical intervals help to generate a consistent centrifugal effect when the airflow enters, further improving the separation effect of particulate matters in the airflow and improving air quality.

[0055] Optionally, as shown in Figure 2 the second end portion 932 is helically arranged outside the first pipeline 91. In the embodiment of the present disclosure, the helically arranged second end portion 932 enhances the connection strength and sealing performance between the air cap 93 and the pipeline, effectively preventing airflow leakage or external foreign matter intrusion, and ensuring the purity and efficient flow of the airflow. At the same time, the helical structure forms a protective barrier outside the first pipeline 91, which can disperse external wind pressure or impact force and improve the durability and wind resistance of the air cap 93.

[0056] Optionally, the fresh air pipeline 90 further comprises a fixing device 94, which is attached to the outside of the second end portion 932 and used for fixing the second end portion 932.

[0057] In the embodiment of the present disclosure, the fixing device 94 further enhances the stability and practicality of the air cap 93. The fixing device 94 can firmly fix the second end portion 932 outside the first pipeline 91, preventing the loosening or falling off of the air cap 93 due to wind pressure, vibration or external impact, and ensuring the long-term stability of the connection between the air cap 93 and the first pipeline 91.

[0058] Optionally, the fixing device 94 can be an adhesive fixing device such as a tape, or a buckle fixing device, a bolt fixing device, a hoop fixing device, a magnetic fixing device, etc. Preferably, the fixing device 94 is an adhesive fixing device, which is low in cost and easy to install and disassemble.

[0059] Optionally, the first pipeline 91 is made of a hard polymer material.

[0060] In this embodiment, the first duct 91 is made of a rigid polymer material. Rigid polymer materials are characterized by high strength, corrosion resistance, and lightweight, enabling the first duct 91 to effectively resist chemical corrosion, humidity changes, and ultraviolet radiation in the environment while ensuring structural stability, thus extending its service life. Furthermore, the smooth surface of the rigid polymer material reduces frictional resistance during airflow, lowers energy loss, and improves ventilation efficiency.

[0061] Optionally, the first conduit 91 is made of rigid PVC (polyvinyl chloride) or PP (polypropylene), etc.

[0062] Optionally, such as Figure 1 As shown, the first pipe 91 is adapted to penetrate the installation base 100. The first pipe 91 also includes a second port, which is arranged opposite to the first port 911. The fresh air pipe 90 also includes a second pipe 92, one end of which is adapted to be detachably connected to the second port, and the other end is used to connect to the fresh air inlet 101 or the stale air outlet 105 of the air handling unit.

[0063] In this embodiment, the first pipe 91 is installed within the installation base 100, and the second pipe 92 can be connected to or disconnected from the first pipe 91. This facilitates the overall transportation and installation of the fresh air duct 90, and also enables the installation of the fresh air duct 90.

[0064] Optionally, the installation base 100 can be a wall, ceiling, or other cabinet or other structure through which the fresh air duct 90 and other pipes need to pass.

[0065] Optionally, such as Figures 4 to 7 As shown, the second pipe 92 can be sleeved on the outside of the first pipe 91 and detachably connected to the first pipe 91; wherein, when the first pipe 91 is inserted into the second pipe 92, the second pipe 92 can deform and fit against the outer wall of the first pipe 91.

[0066] In this embodiment of the fresh air duct 90, the first conduit 91 and the second conduit 92 of the fresh air duct 90 are detachably connected, which improves the flexibility and convenience of the installation of the fresh air duct 90. When the first conduit 91 is inserted into the second conduit 92, the second conduit 92 can deform and fit against the outside of the first conduit 91, thus enhancing the connection and sealing of the first conduit 91 and the second conduit 92, preventing airflow leakage, improving the overall stability of the fresh air duct 90, and effectively resisting vibration or external impact. Moreover, this also facilitates the installation and disassembly of the first conduit 91 and the second conduit 92 without the need for additional parts, reducing costs. Furthermore, through this connection method of the first conduit 91 and the second conduit 92, the fresh air duct 90 can not only pass through one wall but also through multiple walls without the need for additional conversion structures, greatly reducing the number of parts and lowering costs.

[0067] Optionally, the first pipe 91 is made of hard material, and the second pipe 92 is made of deformable flexible material.

[0068] In the embodiments of the present disclosure, the first pipe 91 made of hard material provides high strength and stability, can effectively support the overall structure and ensure the efficiency of airflow transmission, and can resist external impact and pressure. The second pipe 92 made of deformable flexible material can elastically deform when being sleeved, tightly fit on the outer wall surface of the first pipe 91, form a high-sealing connection, and prevent airflow leakage. Moreover, the first pipe 91 and the second pipe 92 are made of the above-mentioned materials, which facilitates the connection of the first pipe 91 and the second pipe 92, and the new air pipe 90 can be quickly installed and disassembled without additional conversion heads. In this way, the new air pipe 90 of the embodiments of the present disclosure is more convenient to connect and has lower cost compared with the new air pipe 90 provided with conversion heads, which is convenient for the new air pipe 90 to pass through one wall, and when passing through multiple walls.

[0069] Optionally, the material of the first pipe 91 is selected from hard polymer materials, including polyvinyl chloride, polypropylene, or a combination thereof; and / or, the material of the second pipe 92 is selected from flexible polymer materials, including polyethylene, thermoplastic elastomer, or a combination thereof.

[0070] In the embodiments of the present disclosure, the first pipe 91 made of hard polymer material has high strength, corrosion resistance and environmental resistance, can provide stable structural support and ensure the efficiency of airflow transmission, and can resist external impact and pressure. The second pipe 92 made of flexible polymer material has good elasticity and deformation ability, can tightly fit the outer wall surface of the first pipe 91 when being sleeved, form a high-sealing connection, and prevent airflow leakage. Moreover, the first pipe 91 and the second pipe 92 are made of the above-mentioned materials, which has low cost and long service life.

[0071] Optionally, the inner wall surface of the second pipe 92 is provided with anti-skid threads to increase the friction force at the connection between the first pipe 91 and the second pipe 92.

[0072] In the embodiments of the present disclosure, after the first pipe 91 is inserted into the second pipe 92, the inner wall surface of the second pipe 92 is provided with anti-skid threads, which can increase the friction force of the connection between the first pipe 91 and the second pipe 92, avoid the separation of the first pipe 91 and the second pipe 92, and further improve the connection stability of the first pipe 91 and the second pipe 92. Threaded connection can also enhance the sealing between the two pipes, prevent airflow leakage, and improve ventilation efficiency.

[0073] Optionally, the second conduit 92 is a threaded flexible hose 921. This not only increases the friction between the first conduit 91 and the second conduit 92, but also ensures a close fit between the first conduit 91 and the second conduit 92. Furthermore, the flexibility of the second conduit 92 can further adapt to first conduits 91 of different sizes or shapes, simplifying the installation process and improving the versatility of the system.

[0074] Optionally, such as Figure 6 As shown, the fresh air duct 90 also includes an insulation layer 922, which is fitted over the outside of the second duct 92. The insulation layer 922 effectively reduces heat loss from the outside of the second duct 92 or the impact of external temperature on the airflow inside the second duct 92, ensuring a stable airflow temperature during transmission and thus improving the energy efficiency of the ventilation system. In cold environments, the insulation layer 922 prevents the airflow temperature inside the second duct 92 from becoming too low, avoiding condensation or icing. In high-temperature environments, the insulation layer 922 blocks external heat, maintaining a cool airflow. Furthermore, the insulation layer 922 reduces the risk of condensation on the outer surface of the duct, preventing moisture accumulation from corroding the duct material and extending its service life.

[0075] Optionally, the insulation layer 922 can be insulation cotton or insulation tape, etc.

[0076] Optionally, such as Figure 4 As shown, the cross-section of the first pipe 91 is elliptical, and the cross-section of the second pipe 92 is circular.

[0077] In this embodiment, the elliptical first pipe 91 provides a larger effective ventilation area, optimizing airflow transmission efficiency. Its flat structure also facilitates installation in limited spaces, saving space. The circular second pipe 92 possesses good structural strength and uniform stress distribution, effectively resisting external pressure and airflow impact, ensuring the stability and sealing of the connection. Furthermore, when the circular cross-section of the second pipe 92 is fitted with the elliptical first pipe 91, its flexibility allows it to tightly conform to the outer wall of the first pipe 91, forming a highly airtight connection and preventing airflow leakage.

[0078] Optionally, when the second pipe 92 remains unchanged, the length of the major axis of the cross-section of the first pipe 91 is greater than the outer diameter of the cross-section of the second pipe 92.

[0079] In this embodiment, the elliptical cross-section of the first conduit 91 has a longer major axis, which allows it to deform appropriately when the second conduit 92 is inserted, thereby tightly fitting against the outer wall of the first conduit 91 and forming a highly airtight connection. Furthermore, the longer major axis of the first conduit 91 increases its flow area.

[0080] Optionally, the outer wall surface of the first pipeline 91 is provided with a positioning mark, and when the first pipeline 91 is inserted into the preset position in the second pipeline 92, the positioning mark corresponds to the second pipeline 92.

[0081] In the embodiments of the present disclosure, the positioning mark can intuitively indicate the preset position of the first pipeline 91 inserted into the second pipeline 92, ensure that the installer quickly and accurately completes the connection, and avoid air leakage or unstable connection caused by inserting too deep or too shallow.

[0082] Optionally, the outer wall surface of the first pipeline 91 is provided with a limiting protrusion, and when the first pipeline 91 is inserted into the preset position in the second pipeline 92, the limiting protrusion is limited with the second pipeline 92 to limit the first pipeline 91 from continuing to be inserted into the second pipeline 92. The limiting protrusion prevents the first pipeline 91 from being excessively inserted into the second pipeline 92 in a physical limiting manner, ensures the accuracy and consistency of the connection position, and enhances the stability of the connection.

[0083] Optionally, as shown in Figure 1 when the number of installation bases 100 is multiple, at least one first pipeline 91 is arranged in each installation base 100, and the second pipeline 92 is connected at one end or both ends of the first pipeline 91, so that the fresh air pipe 90 passes through the installation base 100.

[0084] In the embodiments of the present disclosure, when the fresh air pipe 90 needs to pass through the installation base 100, at least one first pipeline 91 is arranged in each installation base 100, and the second pipeline 92 is connected at one end or both ends of the first pipeline 91, so that the fresh air pipe 90 passes through the wall. Moreover, in this way, the fresh air pipe 90 is suitable for being installed in a complex environment and can pass through multiple walls, and can also be used in single-wall, double-wall or multiple-wall conditions.

[0085] The embodiments of the present disclosure also provide a pipeline assembly, and the air handling unit includes the fresh air pipe 90 according to any one of the above embodiments.

[0086] The embodiments of the present disclosure provide a pipeline assembly, and the pipeline assembly includes the fresh air pipe 90 according to any one of the above embodiments, so has the beneficial effects of the fresh air pipe 90 according to any one of the above embodiments, which will not be described herein again.

[0087] Optionally, as shown in Figure 8 the installation base 100 is also provided with a reserved hole 11, and the pipeline assembly further includes an integrated pipeline 95, the integrated pipeline 95 is located on one side of the first pipeline 91, and the integrated pipeline 95 includes a refrigerant pipe, a drain pipe 953 and an online line 954; wherein the integrated pipeline 95 and the first pipeline 91 can be integrated and pass through one reserved hole 11.

[0088] In the embodiments of the present disclosure, the reserved hole 11 on the installation base 100 can simultaneously accommodate the first pipeline 91 of the fresh air pipe 90 and the integrated pipeline 95 including the refrigerant pipe, the drain pipe 953 and the online line 954, so that the reserved hole 11 can be used to simultaneously arrange multiple pipelines related to the air handling unit, the integrated design reduces the number of openings on the installation base 100 or structure, and there is no need to expand the area of the reserved hole 11, which simplifies the installation and assembly process, and reduces the construction difficulty and cost. The first pipeline 91 adopts an elliptical cross section, which not only optimizes the airflow transmission efficiency, but also saves the occupied space and facilitates integration with other pipelines. The integrated pipeline 95 integrates the refrigerant pipe, the drain pipe 953 and the online line 954 together, which ensures the coordination and stability of each functional pipeline, and reduces the interference between the pipelines.

[0089] Optionally, the pipeline assembly further comprises a connecting piece, the connecting piece being capable of integrally connecting the fresh air pipe 90 and the integrated pipeline 95; wherein the integrated pipeline 95 and the first pipeline 91 are capable of jointly passing through one reserved hole 11 after being integrated.

[0090] In the embodiments of the present disclosure, the fresh air pipe 90 and the integrated pipeline 95 are connected and fixed together through the connecting piece, and the axes of the fresh air pipe 90 and the integrated pipeline 95 are arranged side by side in the reserved hole 11, so that the fresh air pipe 90 and the integrated pipeline 95 can be more stably connected, which facilitates the pipeline assembly to pass through the reserved hole 11 and facilitates the assembly and installation of the pipeline assembly.

[0091] Optionally, the connecting piece is a binding rope or a binding tape, etc., which is low in cost and easy to operate. Alternatively, the connecting piece can also be a buckle fixing piece or a pasting type fixing belt, etc.

[0092] Optionally, part of the outer wall surface of the integrated pipeline 95 or part of the outer wall surface of the first pipeline 91 is adapted to be tangent to the inner wall surface of the reserved hole 11.

[0093] In the embodiments of the present disclosure, part of the outer wall surface of the integrated pipeline 95 or part of the outer wall surface of the first pipeline 91 is adapted to be tangent to the inner wall surface of the reserved hole 11, which improves the installation stability and sealing performance of the pipeline assembly. The tangent cooperation mode can make the pipeline assembly tightly fit the inner wall surface of the reserved hole 11, reduce the installation gap between the pipeline assembly and the reserved hole 11, prevent airflow, liquid or noise leakage, and improve the overall structural stability of the pipeline assembly. In addition, the tangent structure can quickly and accurately position and fix the pipeline assembly during installation, which reduces the installation difficulty and cost.

[0094] Optionally, the integrated pipeline 95 is located above the first pipeline 91, and the refrigerant pipeline comprises a thick copper pipe 951 and a thin copper pipe 952, and the drain pipe 953, the thin copper pipe 952 and the thick copper pipe 951 are sequentially arranged along the long axis direction of the first pipeline 91.

[0095] In the embodiments of the present disclosure, the integrated pipeline 95 and the first pipeline 91 adopt the above arrangement, which can improve the function and space utilization of the pipeline assembly. The first pipeline 91 is in an elliptical shape, and the integrated pipeline 95 is located above the first pipeline 91, so as to fully utilize the vertical space of the reserved hole 11, avoid interference between the pipelines, and facilitate the maintenance and overhaul of the first pipeline 91 and the integrated pipeline 95. The drain pipe 953, the thin copper pipe 952 and the thick copper pipe 951 are sequentially arranged along the long axis direction of the first pipeline 91, which not only optimizes the pipeline layout, but also ensures the independence and coordination of each functional pipeline. The reasonable arrangement of the thick copper pipe 951 and the thin copper pipe 952 can improve the refrigerant transmission efficiency and reduce energy loss, and the arrangement of the drain pipe 953 can effectively solve the condensate water discharge problem and prevent the influence of accumulated water on the system.

[0096] Optionally, the center of the thin copper pipe 952 is higher than the centers of the drain pipe 953 and the thick copper pipe 951.

[0097] In the embodiments of the present disclosure, the higher position of the thin copper pipe 952 can optimize the flow path of the refrigerant, reduce flow resistance, improve refrigerant transmission efficiency, and avoid interference with other pipelines (such as the drain pipe 953 and the thick copper pipe 951). The lower position of the drain pipe 953 and the thick copper pipe 951 facilitates the natural discharge of condensate water and the efficient transmission of refrigerant, ensuring the stable operation of the system. This layered arrangement not only fully utilizes the vertical space, but also simplifies the pipeline layout, facilitating installation and maintenance, and facilitating the circulation of refrigerant, water and fresh air.

[0098] Optionally, the pipeline assembly further comprises a foam 96, which is arranged in the gap between the drain pipe 953, the thick copper pipe 951, the thin copper pipe 952 and the first pipeline 91. The foam 96 can effectively fill the gap between the pipeline assemblies, reduce vibration transmission and noise generation, and improve the quietness of the system. At the same time, the foam 96 has good heat preservation performance, which can prevent the refrigerant pipe and the drain pipe 953 from causing energy loss or condensate water icing due to temperature changes, and improve the energy efficiency and reliability of the system. In addition, the foam 96 can also fix the position of each pipeline, prevent displacement of the pipeline due to vibration or external impact, and enhance the stability of the overall structure of the pipeline assembly.

[0099] Optionally, the online line 954 is arranged between the drain pipe 953 and the inner wall surface of the reserved hole 11, or the online line 954 is arranged between the thick copper pipe 951 and the inner wall surface of the reserved hole 11.

[0100] In the embodiments of the present disclosure, the online line 954 is thin, and the online line 954 is arranged on one side of the integrated pipeline 95, so that the online line 954 is not arranged between multiple pipelines, reducing the influence of the temperature of the refrigerant pipe or the condensate water outside the pipeline on the online line 954, and ensuring the normal work of the online line 954.

[0101] Optionally, the pipeline assembly further comprises a waterproof seal arranged between the integrated pipeline 95 and the inner wall surface of the reserved hole 11, and / or arranged between the first pipeline 91 and the inner wall surface of the reserved hole 11. In the embodiments of the present disclosure, the waterproof seal is arranged outside the integrated pipeline 95 or the first pipeline 91, so that the waterproof seal can prevent the refrigerant pipe and the drain pipe 953 from causing energy loss or condensate water icing due to temperature changes, thereby improving the energy efficiency and reliability of the system. Moreover, the waterproof seal can effectively prevent moisture, dust or other foreign matter from entering the inside of the pipeline through the reserved hole 11, thereby avoiding corrosion or pollution of the pipeline assembly and prolonging the service life of the system. At the same time, the waterproof seal can also enhance the connection stability between the pipeline assembly and the reserved hole 11, reduce looseness or displacement caused by vibration or external impact, and ensure long-term stable operation of the pipeline assembly. In addition, the waterproof seal can also improve the sound insulation performance of the pipeline assembly, reduce noise leakage, and improve the use environment.

[0102] Optionally, the center of the thin copper pipe 952 is on one side of the center of the first pipeline 91, so that the height direction size occupied by the pipeline assembly can be reduced, so that multiple pipelines can be more reasonably arranged in the reserved hole 11.

[0103] Optionally, the equivalent circular tube diameter of the first pipeline 91 is greater than or equal to 37 mm.

[0104] The equivalent circular tube diameter refers to the diameter of a circular pipe having the same flow characteristics as the cross-sectional area of a non-circular pipe or channel. In the embodiments of the present disclosure, the diameter of the traditional fresh air pipe 90 is generally between 30-33 mm, and the equivalent circular tube diameter of the first pipeline 91 is greater than or equal to 37 mm, so that compared with the traditional fresh air pipe 90, the flow area of the fresh air pipe 90 of the embodiments of the present disclosure is larger, which can improve the air volume of the fresh air pipe 90, and further improve the air volume of the air handling unit. The fresh air pipe 90 of the embodiments of the present disclosure is arranged in an elliptical shape, which can increase the flow area inside the pipeline without increasing the size, thereby reducing the resistance and improving the air volume.

[0105] Optionally, the length of the minor axis of the first pipeline 91 is greater than or equal to 30.5 mm; and / or the length of the major axis of the first pipeline 91 is greater than or equal to 55.3 mm.

[0106] In the embodiments of the present disclosure, the diameter of the reserved hole 11 is generally 63 mm, and the first pipeline 91 is in an elliptical shape with a length greater than or equal to 55.3 mm, so as to ensure the flow area of the first pipeline 91, the fresh air flow of the fresh air pipeline 90, and the air volume.

[0107] Optionally, the exterior of the drain pipe 953 is wrapped with a drain heat preservation layer 922, the exterior of the thin copper pipe 952 is wrapped with a first heat preservation layer 922, and the exterior of the thick copper pipe 951 is wrapped with a second heat preservation layer 922, so that the heat preservation layers 922 are correspondingly arranged outside the drain pipe 953 and the refrigerant pipe, so as to ensure the temperature in the drain pipe 953 and the refrigerant pipe.

[0108] Optionally, the diameter of the drain pipe 953 is greater than or equal to 17.6 mm. Optionally, the diameter of the drain heat preservation layer 922 is greater than or equal to 25 mm. Optionally, the diameter of the thick copper pipe 951 is greater than or equal to 12 mm.

[0109] Optionally, the diameter of the second heat preservation layer 922 outside the thick copper pipe 951 is greater than or equal to 30 mm.

[0110] The embodiments of the present disclosure also provide an air handling unit, which comprises the fresh air pipeline 90 according to any one of the above embodiments.

[0111] The embodiments of the present disclosure provide an air handling unit, which comprises the fresh air pipeline 90 according to any one of the above embodiments, and thus has the beneficial effects of the fresh air pipeline 90 according to any one of the above embodiments, which will not be described herein again.

[0112] Optionally, as shown in Figures 9 to 15 the air handling unit further comprises a device body, the device body comprising a shell 10 and a fan, the fan being located in the shell 10, the shell 10 being provided with a fresh air inlet 101 or a turbid air outlet 105; the inlet end of the fresh air pipeline 90 is in communication with the fresh air inlet 101 or the turbid air outlet 105. The device body comprises an air conditioner module, which is in communication with the refrigerant pipe. The device body comprises a water pan, which is in communication with the drain pipe 953. The device body is electrically connected with the online wire 954.

[0113] Optionally, the air handling unit can be an air conditioner, a fresh air machine, or an air conditioner integrated with a fresh air function.

[0114] Optionally, the air conditioner can be a cabinet type air conditioner.

[0115] Optionally, as shown in Figure 14 the fresh air pipeline 90 comprises a fresh air outlet pipe 702, which is in communication with the turbid air outlet 105, wherein the inner wall surface of the turbid air outlet 105 is configured with an internal thread, the outer wall surface of the fresh air outlet pipe 702 is configured with an external thread, and the fresh air outlet pipe 702 is threadedly connected with the turbid air outlet 105.

[0116] In the embodiment of the present disclosure, the new air outlet pipe 702 has a small diameter, and the new air outlet pipe 702 is connected to the turbid air outlet 105 through screw rotation, so that the new air outlet pipe 702 is convenient to connect and detach from the turbid air outlet 105, and no additional connecting piece is needed, thereby improving the convenience of installation and detachment.

[0117] Optionally, the other end of the second pipeline 92 is connected to the inner wall of the turbid air outlet 105 through screw connection.

[0118] Optionally, as shown in the drawings, Figure 13 The new air pipe 90 includes a new air inlet pipe 701, the new air inlet pipe 701 is connected to the new air inlet 101, and the air handling unit further includes a connecting pipeline 703, one end of the connecting pipeline 703 is connected to the new air outlet pipe 702 through screw connection, and the other end of the connecting pipeline 703 is detachably connected to the new air inlet 101.

[0119] In the embodiment of the present disclosure, the diameter of the new air inlet pipe 701 is larger than the diameter of the new air outlet pipe 702, so that the air volume of the new air inlet pipe 701 is larger, and therefore, the new air inlet pipe 701 is connected to the new air inlet 101 through the connecting pipeline 703, so that the connection stability of the new air inlet pipe 701 is improved, and the new air inlet pipe 701 is prevented from deviating, bending or separating from the new air inlet 101 due to the influence of air flow.

[0120] Optionally, the other end of the connecting pipeline 703 is connected to the new air inlet 101 through clamping.

[0121] Optionally, the other end of the connecting pipeline 703 is arranged outside the new air inlet 101, the outer wall of the pipe wall of the new air inlet 101 is provided with a limiting column 704, the other end of the connecting pipeline 703 is provided with a limiting groove 705, when the connecting pipeline 703 is connected to the new air inlet 101, the limiting column 704 is located in the limiting groove 705, and the limiting column 704 abuts against the groove wall on one side of the limiting groove 705, so as to limit the rotation of the connecting pipeline relative to the new air inlet 101 in a preset direction.

[0122] Optionally, the opening area of the limiting groove 705 is larger than the cross-sectional area of the limiting column 704, so that when the new air inlet pipe 701 needs to be detached, the new air inlet pipe 701 is rotated in the direction opposite to the preset direction, and the limiting groove 705 and the limiting column 704 are no longer in contact, so that the new air inlet pipe is convenient to detach from the equipment body.

[0123] Optionally, the number of the limiting grooves 705 is multiple, the multiple limiting grooves 705 are arranged at intervals along the circumference of the new air inlet pipe 701, and the number of the limiting columns 704 is the same as and corresponds to the number of the limiting grooves 705.

[0124] Optionally, the second pipeline 92 of the fresh air inlet pipe 701 can be sleeved outside the fresh air inlet 101. Here, since the second pipeline 92 is made of flexible material, the second pipeline 92 can be tightly attached to the outside of the pipe wall of the fresh air inlet 101.

[0125] Optionally, as shown in FIG. 1, the housing 10 defines a first airflow channel having a fresh air inlet 101, a first indoor outlet 102, and a first turbid air inlet 103; a first fan 201 is located in the first airflow channel, an inlet of the first fan 201 is in communication with the fresh air inlet 101 and / or the first turbid air inlet 103, and an outlet of the first fan 201 is in communication with the first indoor outlet 102; and a first purification device 203 is arranged in the first airflow channel and used for purifying the airflow flowing into the first airflow channel through the fresh air inlet 101 and / or the first turbid air inlet 103. Figures 10 to 12

[0126] In the embodiment of the present disclosure, the first fan 201 can drive the outdoor airflow to flow into the first airflow channel and then into the indoor space through the first indoor outlet 102, so as to provide fresh air for the indoor space. The first fan 201 can also drive the indoor airflow to flow into the first airflow channel through the first turbid air inlet 103, and then flow into the indoor space through the first indoor outlet 102 after being purified in the first airflow channel. In this way, the air handling unit can effectively distinguish the treatment of fresh air and indoor turbid air by arranging the first airflow channel and the first purification device 203. The fresh air flows into the first airflow channel through the fresh air inlet 101 and is purified by the first purification device 203 before being sent into the indoor space through the first indoor outlet 102, so as to provide fresh air for the indoor space and purify impurities to ensure the air quality of the indoor space. The indoor turbid air flows into the first airflow channel through the first turbid air inlet 103 and is purified by the first purification device 203 before being sent back into the indoor space through the first indoor outlet 102. This separation treatment mode significantly improves the air purification effect and ensures the continuous optimization of the indoor air quality.

[0127] The inlet of the first fan 201 is in communication with the fresh air inlet 101 and / or the first turbid air inlet 103, so that the device can flexibly switch between the fresh air mode and the indoor circulation mode according to actual needs. In the fresh air mode, the device introduces outdoor fresh air; in the indoor circulation mode, the device purifies the indoor air. This flexible airflow control mode can meet the air treatment needs in different scenarios. By reasonably designing the airflow channel and the fan layout, the air handling unit can effectively reduce energy consumption during operation. At the same time, the service life of the first purification device 203 is relatively long, which reduces the cost and resource waste of frequent replacement of filter screens and is more energy-saving and environmentally friendly.

[0128] ​In addition, the fresh air inlet 101, the first dirty air inlet 103 and the first indoor outlet 102 of the casing 10 are integrated in the same air flow channel, which is compact in structure, easy to install and space layout. Moreover, the first purification device 203 and the fan are modularly designed, which is easy to disassemble and maintain, and prolongs the service life of the device.

[0129] Optionally, the first purification device 203 is a high-efficiency filter. For example, the first purification device 203 can be a HEPA filter, activated carbon adsorption, etc.

[0130] In the embodiment of the present disclosure, the first purification device 203 is arranged in the first air flow channel, which is used to purify the indoor dirty air flowing from the first dirty air inlet 103 and / or the fresh air flowing from the fresh air inlet 101. Through multi-layer filtration or high-efficiency purification technology, the particulate matter, odor and harmful substances in the air can be effectively removed, and the cleanliness of the indoor air is further improved.

[0131] Optionally, as shown in Figure 15 The air handling unit further includes an anti-backflow plate 30 and an internal purification plate 40. The anti-backflow plate 30 is movably arranged at the fresh air inlet 101, which is used to open or close the fresh air inlet 101. The internal purification plate 40 is movably arranged at the first dirty air inlet 103, which is used to open or close the first dirty air inlet 103. When the anti-backflow plate 30 opens the fresh air inlet 101 and the internal purification plate 40 closes the first dirty air inlet 103, the first fan 201 drives the fresh air flowing from the fresh air inlet 101 to flow through the first air flow channel and then flows out from the first indoor outlet 102 to the indoor. When the anti-backflow plate 30 closes the fresh air inlet 101 and the internal purification plate 40 opens the first dirty air inlet 103, the first fan 201 drives the indoor air to flow from the first dirty air inlet 103 into the first air flow channel and then flows out from the first indoor outlet 102 to the indoor after being purified by the first purification device 203.

[0132] In the embodiments of the present disclosure, the anti-backflow plate 30 is movably arranged at the fresh air inlet 101 and can open or close the fresh air inlet 101 as needed. When the outdoor air quality is poor (such as haze, dust, etc.), the anti-backflow plate 30 closes the fresh air inlet 101, effectively preventing outdoor pollutants from flowing back into the indoor environment, and ensuring the cleanliness of the indoor air. This design significantly enhances the environmental adaptability of the air handling unit, especially in heavily polluted areas. The inner purification plate 40 is movably arranged at the first turbid air inlet 103 and can open or close the first turbid air inlet 103 as needed. When the anti-backflow plate 30 closes the fresh air inlet 101 and the inner purification plate 40 opens the first turbid air inlet 103, the device enters the internal circulation mode, and the first fan 201 drives indoor air to flow from the first turbid air inlet 103, purifies it through the first purification device 203, and then sends it back to the indoor environment through the first indoor outlet 102. This mode can efficiently purify indoor air and is suitable for scenarios where outdoor air quality is poor or indoor air quality needs to be improved quickly. Through the coordinated work of the anti-backflow plate 30 and the inner purification plate 40, the air purification device can flexibly switch between the fresh air mode and the internal circulation mode according to actual needs. In the fresh air mode, the anti-backflow plate 30 opens the fresh air inlet 101, and the inner purification plate 40 closes the first turbid air inlet 103, and the device introduces outdoor fresh air; in the internal circulation mode, the anti-backflow plate 30 closes the fresh air inlet 101, and the inner purification plate 40 opens the first turbid air inlet 103, and the device purifies the indoor air in a circulating manner. This flexible mode switching function can meet the air treatment needs in different scenarios and improve user experience.

[0133] In addition, the design of the anti-backflow plate 30 and the inner purification plate 40 enables the air purification device to automatically select the optimal operating mode according to the indoor and outdoor air quality, avoiding unnecessary energy consumption. For example, when the outdoor air quality is good, the fresh air mode is preferred; when the outdoor air quality is poor, the internal circulation mode is automatically switched to, reducing the introduction of outdoor pollutants and reducing energy consumption. Moreover, the anti-backflow plate 30 and the inner purification plate 40 are designed to be movable, simple in structure and easy to realize automatic control. Through motor-driven or manual adjustment, the opening and closing states of the fresh air inlet 101 and the first turbid air inlet 103 can be quickly and accurately controlled, ensuring efficient operation of the device. By adding the anti-backflow plate 30 and the inner purification plate 40, the air handling unit of the present application not only has the functions of anti-backflow and internal circulation purification, but also realizes flexible air flow mode switching and energy-efficient operation, significantly improving the practicality, environmental adaptability and user experience of the device.

[0134] Optionally, as Figure 12As shown, the shell 10 further defines a second airflow channel having a second dirty air inlet and a dirty air outlet 105, the dirty air outlet 105 being in communication with the outdoor, and the air handling unit further comprises a second fan 202 located in the accommodating cavity, the second fan 202 being in communication between the second dirty air inlet and the dirty air outlet 105; the second fan 202 is capable of driving the indoor airflow to flow into the second airflow channel from the second dirty air inlet and then flow out from the dirty air outlet 105.

[0135] In the embodiments of the present disclosure, the second airflow channel is used to treat the dirty air in the room, and the second fan 202 is capable of driving the dirty air in the room to flow into the second airflow channel through the second dirty air inlet and then be discharged to the outdoor from the dirty air outlet 105, so as to achieve the exhaust of the room. This independent airflow channel design avoids the mixing of the dirty air and the fresh air, ensures the cleanliness of the indoor air, and reduces the pollution to the outdoor environment. Through the dirty air discharge function of the second airflow channel, the device can quickly discharge the dirty air in the room, avoiding the accumulation of pollutants in the room. By arranging the second airflow channel and the second fan 202, the air treatment mode of the air handling unit is further increased, the fresh air in the first airflow channel flows into the room to supplement the fresh air, and the second airflow channel can discharge the dirty air to the outdoor, thereby improving the airflow circulation between the indoor and outdoor and quickly improving the air quality in the room. When the first airflow channel circulates, the airflow flowing into the room through the first dirty air inlet 103 flows into the room through the first purification device 203, and the airflow of the second airflow channel can be discharged to the outdoor, which also improves the air quality in the room.

[0136] Optionally, the air handling unit further comprises a second purification device 204 arranged in the second airflow channel and used for purifying the airflow flowing into the second dirty air inlet, and the second fan 202 is capable of driving the indoor airflow to flow into the second airflow channel from the second dirty air inlet and then flow out from the dirty air outlet 105 after being purified by the second purification device 204.

[0137] In the embodiments of the present disclosure, the second airflow channel is used to treat the dirty air in the room, and the second fan 202 is capable of driving the dirty air in the room to flow into the second airflow channel through the second dirty air inlet and then be discharged to the outdoor from the dirty air outlet 105 after being purified by the second purification device 204, so as to achieve the exhaust of the room. The purification function of the second purification device 204 further improves the cleanliness of the indoor air, and provides a more healthy and comfortable air environment for the user. By arranging the second airflow channel, the second fan 202 and the second purification device 204, the air treatment mode of the air handling unit is further increased, the fresh air in the first airflow channel flows into the room to supplement the fresh air, and the second airflow channel can discharge the dirty air to the outdoor, thereby improving the airflow circulation between the indoor and outdoor and quickly improving the air quality in the room.

[0138] Optionally, as shown in FIG. 6, the air handling unit further comprises a third airflow channel 301, the third airflow channel 301 being arranged in the shell 10 and having a third dirty air inlet 303 and a third dirty air outlet 305, the third dirty air outlet 305 being in communication with the outdoor, and the air handling unit further comprises a third fan 302 located in the accommodating cavity, the third fan 302 being in communication between the third dirty air inlet 303 and the third dirty air outlet 305; the third fan 302 is capable of driving the indoor airflow to flow into the third airflow channel from the third dirty air inlet 303 and then flow out from the third dirty air outlet 305. Figure 11As shown, the shell 10 is also provided with a second indoor outlet 104, which is in communication with the second airflow passage. The air handling unit further comprises an air duct switching plate movably arranged in the second airflow passage, which is used to adjust the communication between the outlet of the second fan 202 and the turbid air outlet 105 or the second indoor outlet 104, so that the airflow flowing into the second turbid air inlet is guided to flow from the turbid air outlet 105 to the outdoor or to flow through the second indoor outlet 104 to the indoor.

[0139] In the embodiments of the present disclosure, the air duct switching plate is movably arranged in the second airflow passage, which can adjust the communication between the outlet of the second fan 202 and the turbid air outlet 105 or the second indoor outlet 104 according to actual needs. When the air duct switching plate communicates the outlet of the second fan 202 with the turbid air outlet 105, the air handling unit enters the turbid air discharge mode, and the indoor turbid air is discharged to the outdoor after being purified. When the air duct switching plate communicates the outlet of the second fan 202 with the second indoor outlet 104, the air handling unit enters the internal circulation mode, and the purified airflow is sent back to the indoor. This flexible mode switching function can meet the air treatment needs in different scenarios, improve the practicality of the device, and improve the air treatment efficiency and energy utilization rate. Moreover, through the arrangement of the air duct switching plate, the communication between the outlet of the second fan 202 and the turbid air outlet 105 or the second indoor outlet 104 can be flexibly adjusted, the airflow direction can be controlled and adjusted, and the flexibility and diversity of air treatment are improved, thereby improving the air treatment efficiency. Through the design of the air duct switching plate, the second airflow passage can not only discharge turbid air, but also send the purified airflow back to the indoor. This dual-function integration enables the device to realize the dual effects of turbid air discharge and internal circulation purification in a single structure, thereby saving space and cost. Moreover, the air duct switching plate enables the air handling unit to automatically select the optimal operation mode according to the indoor and outdoor air quality. For example, when the outdoor air quality is poor, the air handling unit can be switched to the internal circulation mode to avoid the introduction of outdoor pollutants; when the indoor air quality is poor, the air handling unit can be switched to the turbid air discharge mode to quickly discharge the indoor dirty air. This intelligent operation mode not only improves the air treatment efficiency, but also reduces the energy consumption, and is more energy-saving and environmentally friendly.

[0140] In one specific embodiment, when the anti-backflow plate 30 is opened to open the fresh air inlet 101, the internal purification plate 40 is closed to close the first turbid air inlet 103, and the air duct switching plate is switched to communicate the outlet of the second fan 202 with the turbid air outlet 105, the air handling unit operates in the hyper-ventilation mode, the outdoor fresh air flows into the indoor through the fresh air inlet 101, the first airflow passage and the first indoor outlet 102, and the indoor turbid air flows into the second airflow passage through the second turbid air inlet, and then is discharged to the outdoor through the turbid air outlet, so that the air can be quickly exchanged, and the indoor air quality can be quickly improved.

[0141] In another specific embodiment, when the anti-inversion plate 30 opens the fresh air inlet 101, the inner purification plate 40 closes the first turbid air inlet 103, and the air duct switching plate switches to the second air outlet of the second fan 202 to be communicated with the second indoor outlet 104, the air handling unit runs in the fresh and clean oxygen mode, the outdoor fresh air flows to the indoor through the fresh air inlet 101, the first airflow channel and the first indoor outlet 102 to supplement the fresh air for the indoor, and at the same time, the turbid air in the indoor flows into the second airflow air duct through the second turbid air inlet, is purified by the second purification device 204, and then flows to the indoor from the second indoor outlet 104, so that the air handling unit can simultaneously supplement the fresh air and purify the indoor airflow, and the functions of the fresh air and purification are realized at the same time.

[0142] In another specific embodiment, when the anti-inversion plate 30 closes the fresh air inlet 101, the inner purification plate 40 opens the first turbid air inlet 103, and the air duct switching plate switches to the second air outlet of the second fan 202 to be communicated with the turbid air outlet 105, the air handling unit runs in the fast and clean smell mode, the turbid air in the indoor flows to the indoor through the first turbid air inlet 103, the first airflow channel and the first indoor outlet 102 to purify the indoor airflow, and at the same time, the turbid air in the indoor flows into the second airflow air duct through the second turbid air inlet, and then is discharged to the outdoor from the turbid air outlet, so that the turbid air in the indoor can be discharged, and the indoor purification and the discharge of the turbid air to the outdoor are simultaneously performed, and the indoor odor can be quickly discharged through the indoor purification and the exhaust.

[0143] In another specific embodiment, when the anti-inversion plate 30 closes the fresh air inlet 101, the inner purification plate 40 opens the first turbid air inlet 103, and the air duct switching plate switches to the second air outlet of the second fan 202 to be communicated with the second indoor outlet 104, the air handling unit runs in the super purification mode, the turbid air in the indoor flows to the indoor through the first turbid air inlet 103, the first airflow channel and the first indoor outlet 102 to purify the indoor airflow, and at the same time, the turbid air in the indoor flows into the second airflow air duct through the second turbid air inlet, and then flows to the indoor from the second indoor outlet 104, so that the double fans can simultaneously purify the indoor air and quickly purify.

[0144] Optionally, the turbid air outlet 105 and the second indoor outlet 104 are different in the air outlet direction on the horizontal plane.

[0145] In the embodiments of the present disclosure, the turbid air outlet 105 and the second indoor outlet 104 are different in the air outlet direction on the horizontal plane, which can meet the demand of airflow direction for different space layouts, and improve the adaptability and practicality of air treatment. The air handling unit of the embodiments of the present disclosure effectively solves the technical problems of single airflow direction, insufficient switching of turbid air discharge and indoor circulation, and single air outlet direction, significantly improves the flexibility and efficiency of air treatment, and meets the demand of diversified use scenarios.

[0146] Optionally, the shell 10 defines a second fan cavity, the second fan 202 is located in the second fan cavity, the shell 10 comprises a second air outlet shell 501 and a third air outlet shell 502, the second air outlet shell 501 defines a first exhaust passage with a turbid air outlet 105, an inlet of the first exhaust passage is communicated with an outlet of the second fan cavity; the third air outlet shell 502 defines a second exhaust passage with a second indoor outlet 104, an inlet of the second exhaust passage is communicated with the outlet of the second fan cavity; wherein the air duct switching plate can move between the first position and the second position, when the air duct switching plate moves to the first position, the air duct switching plate closes the inlet of the second exhaust passage, so that the outlet of the second fan cavity is communicated with the first exhaust passage; when the air duct switching plate moves to the second position, the air duct switching plate closes the inlet of the first exhaust passage, so that the outlet of the second fan cavity is communicated with the second exhaust passage.

[0147] In the embodiment of the present disclosure, the second air outlet shell 501 and the third air outlet shell 502 respectively define a first exhaust passage with a turbid air outlet 105 and a second exhaust passage with a second indoor outlet 104. This double-channel design enables the air handling unit to flexibly select the air flow path according to the actual demand, realizing the functions of turbid air discharge or internal circulation purification, and meeting the air treatment demand in different scenarios. Through intelligent control of the air duct switching plate, the air handling unit can automatically select the optimal operation mode according to the indoor and outdoor air quality, and through the movement of one air duct switching plate, the communication of the two exhaust passages with the second fan 202 can be realized.

[0148] Optionally, the shell 10 further comprises a conversion shell 503, the conversion shell 503 defines a conversion cavity, the conversion cavity is communicated between the outlet of the second fan cavity and the inlets of the first exhaust passage and the second exhaust passage; wherein the air duct switching plate is movably arranged in the conversion cavity.

[0149] In the embodiment of the present disclosure, the outlet of the second fan 202 is communicated with the first exhaust passage and the second exhaust passage through the conversion cavity, which facilitates the arrangement of the air duct switching plate, so that the outlet of the second fan 202 can be communicated with the first exhaust passage or the second exhaust passage through one air duct switching plate.

[0150] Optionally, the bottom of the conversion cavity is communicated with the outlet of the second fan cavity, the top of the conversion cavity is communicated with the first exhaust passage, and the side of the conversion cavity is communicated with the second exhaust passage; wherein when the air duct switching plate moves to the first position, the air duct switching plate blocks between the side of the conversion cavity and the inlet of the second exhaust passage; when the air duct switching plate moves to the second position, the air duct switching plate blocks between the top of the conversion cavity and the inlet of the first exhaust passage.

[0151] In the embodiments of the present disclosure, the conversion cavity is communicated at the top of the second fan 202, and the first exhaust channel and the second exhaust channel are respectively communicated at the top and the side of the conversion cavity, so that the setting positions of the first exhaust channel and the second exhaust channel do not interfere with each other, and the turbid air outlet 105 and the second indoor outlet 104 are respectively oriented in different directions, thereby realizing multi-directional air outlet of the air handling unit.

[0152] Optionally, the extension direction of the first exhaust channel is opposite to the extension direction of the second exhaust channel.

[0153] In the embodiments of the present disclosure, the extension directions of the two exhaust channels are opposite, so that the air outlet directions of the turbid air outlet 105 and the second indoor outlet 104 are opposite, so that the turbid air outlet 105 is generally communicated with the external fresh air pipe 90 and is close to the wall, the second indoor outlet 104 is oriented towards the indoor and is opposite to the air outlet direction of the turbid air outlet 105, which can not only ensure the air outlet range, but also improve the appearance of the air handling unit.

[0154] Optionally, the air handling unit further comprises a shell 60, the fresh air module is located in the shell 60, and the air handling unit further comprises a heat exchanger and a heat exchanger fan, and the heat exchanger and the heat exchanger fan are located in the containing cavity. Optionally, the air handling unit is located below the containing cavity, and the heat exchanger and the heat exchanger fan are located above the air handling unit, so that the air conditioner can not only perform refrigeration and heating of the air conditioner, but also perform the functions of fresh air and air purification, thereby improving the air outlet diversity and use diversity of the air conditioner.

[0155] Optionally, as shown in Figure 9 The shell 60 is further provided with a heat exchange air inlet 601 and a heat exchange air outlet, wherein the shell 60 is provided with air vents corresponding to the fresh air inlet 101, the turbid air outlet 105, the first turbid air inlet 103, the first indoor outlet 102 and the second indoor outlet 104, and at least one of the air vents corresponding to the fresh air inlet 101, the turbid air outlet 105, the first turbid air inlet 103 and the first indoor outlet 102 is located on the same side wall of the shell 60 as the heat exchange air inlet 601. The air vent corresponding to the second indoor outlet 104 is located on the same side wall of the shell 60 as the heat exchange air outlet.

[0156] The above description and drawings suffice to fully enable one skilled in the art to practice the embodiments of the present disclosure. Other embodiments can include structural and other changes. The embodiments are merely representative of possible variations. Individual components and functions are optional unless explicitly required, and the order of operations can be varied. Portions and features of some embodiments can be included in, or substituted for, portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and can be varied in a variety of ways. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. A fresh air duct, characterized in that The new air pipe comprises: a first pipe with a cross section in a central symmetry shape; a hood arranged at a first port of the first pipe, the first port being adapted to communicate with the outside, the hood having a first end and a second end, the second end being connected to the first pipe; wherein the first end is spirally wound, and the spiral diameter of the first end gradually decreases in a direction away from the first pipe.

2. The new air pipe according to claim 1, wherein the cross section of the first pipe is in an elliptical shape.

3. The new air pipe according to claim 1, wherein the spiral diameter of the first end gradually decreases in a direction away from the first pipe to form a tapered portion, and a tip of the tapered portion is located on an extension line of a central axis of the first pipe.

4. The new air pipe according to claim 1, wherein the first end protrudes from the first port; and / or the spiral spacing of the first end is uniformly arranged.

5. The new air pipe according to claim 1, wherein the second end is spirally arranged outside the first pipe.

6. Fresh air duct according to claim 5, characterized in that The new air pipe further comprises: a fixing device attached to the outside of the second end for fixing the second end.

7. The new air pipe according to claim 1, wherein the first pipe is made of a hard polymer material; and / or an equivalent circular tube diameter of the first pipe is greater than or equal to 37 mm.

8. The new air pipe according to any one of claims 1 to 7, wherein the first pipe is adapted to be installed through a base, the first pipe further comprises a second port arranged opposite to the first port, and the new air pipe further comprises: a second pipe, one end of which is adapted to be detachably connected to the second port, and the other end of which is adapted to communicate with a new air inlet or a turbid air outlet of an air handling unit.

9. An air handling unit, comprising: The device body comprises a shell and a fan, the fan being located in the shell, and the shell is provided with a new air inlet or a turbid air outlet; the new air pipe according to any one of claims 1 to 8, the new air pipe being connected to the new air inlet or the turbid air outlet.

10. The air handling unit according to claim 9, wherein the new air pipe comprises a new air outlet pipe, the new air outlet pipe being connected to the turbid air outlet, wherein an inner wall surface of the turbid air outlet is configured with an internal thread, an outer wall surface of the new air outlet pipe is configured with an external thread, and the new air outlet pipe is threadedly connected to the turbid air outlet; and / or the new air pipe comprises a new air inlet pipe, the new air inlet pipe being connected to the new air inlet, and the air handling unit further comprises: a connecting pipe, one end of which is threadedly connected to the new air inlet pipe, and the other end of which is detachably connected to the new air inlet. ​

Images