Heating and ventilation equipment

Abstract

The heating and ventilation device provided in the application comprises a main body, an external fan and an external structure. The main body comprises a shell, a first fan and a second fan arranged in the shell. The external structure accommodates the external fan and has a first opening and a second opening in communication with the outdoor. The air inlet side of the external fan is in communication with the first opening, and the air outlet side of the external fan is in communication with the air inlet side of the first fan through a first air duct. The air outlet side of the first fan can blow air indoors. The air inlet side of the second fan is in communication with the indoor, and the air outlet side of the second fan is in communication with the second opening through a second air duct. Through the cooperative work of the external fan and the first fan, the device can continuously introduce fresh outdoor air, reduce the carbon dioxide concentration indoors, increase the oxygen content, and thus improve the indoor air quality.

Description

Technical Field

[0001] This application relates to the field of air handling, and more particularly to heating, ventilation, and air conditioning (HVAC) equipment. Background Technology

[0002] Heating systems are devices used to heat air to increase indoor temperature, aiming to provide a comfortable indoor environment. These devices are widely used in residential, commercial, and industrial buildings.

[0003] Heating equipment typically uses electrical energy to convert into heat energy, and then uses a fan to deliver the heated air into the room to meet the user's temperature needs.

[0004] However, existing heating equipment only has a blowing function, which leads to poor indoor air circulation and makes users feel stuffy. Utility Model Content

[0005] The heating and ventilation equipment provided in this application is used to solve the problem of poor indoor air circulation caused by heating equipment.

[0006] This application provides a heating, ventilation and air conditioning (HVAC) device, including a main body, an external fan, and an external structure;

[0007] The main body includes a housing, and a first fan and a second fan disposed within the housing;

[0008] The external structure houses the external fan, and the external structure has a first opening and a second opening that communicate with the outside.

[0009] The air inlet side of the external fan is connected to the first opening, and the air outlet side of the external fan can be connected to the air inlet side of the first fan through the first air duct; the air outlet side of the first fan can discharge air into the room.

[0010] The air inlet side of the second fan is connected to the indoor space, and the air outlet side of the second fan can be connected to the second opening through the second air duct.

[0011] In some embodiments of this application, the external structure is provided with a communication structure, the housing is provided with an installation port, and the installation port is connected to the second air duct.

[0012] In some embodiments of this application, the housing extends along a first direction, and the external structure is disposed on one side of the housing along the first direction;

[0013] The first fan and the second fan are arranged along the first direction, with the first fan being farther away from the external structure relative to the second fan.

[0014] In some embodiments of this application, in the height direction of the external structure, the height of the first port is lower than the height of the second port.

[0015] In some embodiments of this application, the first air duct and the second air duct are independently arranged within the housing.

[0016] In some embodiments of this application, the external structure is provided with a partition plate, which separates the external structure into a first chamber and a second chamber that are independent of each other;

[0017] The first chamber is connected to the first opening and the first air duct, and the external fan is located inside the first chamber; the second chamber is connected to the second opening and the second air duct.

[0018] In some embodiments of this application, the external structure is provided with a mounting structure, and the external structure can be fixed to the housing through the mounting structure.

[0019] In some embodiments of this application, the mounting structure can be inserted into the housing, the mounting structure is disposed on at least one connector, and the mounting structure can be fixed to the housing through the connector.

[0020] In some embodiments of this application, the housing is provided with a ventilation panel that can be directed toward the indoor environment;

[0021] The ventilation panel extends along a first direction, and the first fan and the second fan are arranged at intervals along the first direction.

[0022] In some embodiments of this application, the ventilation panel is provided with ventilation openings, which include air outlets and air inlets spaced apart.

[0023] The air outlet is connected to the air outlet of the first fan, and the air inlet is connected to the air inlet of the second fan.

[0024] The HVAC equipment provided in this application embodiment, through the coordinated operation of an external fan and a first fan, can continuously introduce fresh outdoor air, reduce indoor carbon dioxide concentration, increase oxygen content, and thus improve indoor air quality. Due to the introduction of fresh air, the equipment avoids the problem of air dryness caused by heating, maintains suitable indoor air humidity, and reduces discomfort. Through reasonable air circulation design, the equipment achieves efficient air exchange while providing warm air, reducing energy consumption. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0026] Figure 1This is a schematic diagram of the structure of the HVAC equipment provided in the embodiments of this application;

[0027] Figure 2 This is an exploded view of the housing and external structure of the HVAC equipment provided in the embodiments of this application;

[0028] Figure 3 This is a schematic diagram of the internal structure of the HVAC equipment provided in the embodiments of this application;

[0029] Figure 4 This is a schematic diagram of the installation structure in the HVAC equipment provided in the embodiments of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. Main body; 110. Shell; 121. Second fan; 122. First fan; 130. Mounting port;

[0032] 200. External fan; 201. External structure; 202. Second port; 203. First port; 210. Connecting structure;

[0033] 310. First air duct; 320. Second air duct;

[0034] 400. Installation structure;

[0035] 500, ventilation panel; 510, ventilation opening.

[0036] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0037] As mentioned in the background technology, the heating equipment continuously blows hot air into the room. In a closed environment, the heating equipment does not introduce fresh air when it is running, which may lead to an increase in carbon dioxide concentration and a decrease in oxygen content, affecting air quality. The heating equipment may also reduce air humidity during the heating process, resulting in dry air and further aggravating discomfort.

[0038] Therefore, there is an urgent need for a heating device that can solve the problem of poor indoor air circulation.

[0039] In view of this, the present application provides a heating and ventilation device that, through the coordinated operation of an external fan and a first fan, can continuously introduce fresh outdoor air, reduce indoor carbon dioxide concentration, increase oxygen content, and thus improve indoor air quality. Due to the introduction of fresh air, the device avoids the problem of air dryness caused by heating, maintains suitable indoor air humidity, and reduces discomfort. Through reasonable air circulation design, the device achieves efficient air exchange while providing warm air, reducing energy consumption.

[0040] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0041] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0042] refer to Figures 1-3 This application provides a heating, ventilation and air conditioning (HVAC) device, including a main body 100, an external fan 200, and an external structure 201.

[0043] The main body 100 includes a housing 110, and a first fan 122 and a second fan 121 disposed within the housing 110.

[0044] The external structure 201 houses the external fan 200 and has a first opening 203 and a second opening 202 that connect to the outside.

[0045] The air inlet side of the external fan 200 is connected to the first port 203, and the air outlet side of the external fan 200 can be connected to the air inlet side of the first fan 122 through the first air duct 310; the air outlet side of the first fan 122 can discharge air into the room.

[0046] The air inlet side of the second fan 121 is connected to the indoor space, and the air outlet side of the second fan 121 can be connected to the second opening 202 through the second air duct 320. It can be understood that the housing 110, as the external structure of the entire equipment, provides protection and support, and houses other functional components such as the first fan 122 and the second fan 121, as well as heating elements and control elements.

[0047] The first fan 122 is located inside the housing 110. Its air inlet side is connected to the external fan 200 through the first air duct 310, and its air outlet side faces the room. Its main function is to deliver the air introduced from the outside by the external fan 200 to the first fan 122 through the first air duct 310, and the first fan 122 then delivers fresh air to the room.

[0048] The second fan 121 is also located inside the housing 110. Its air inlet side is connected to the indoor air, and its air outlet side is connected to the second port 202 through the second air duct 320 to exhaust the indoor air to the outside, thereby realizing the ventilation function.

[0049] In some embodiments, the first fan 122 can be a heater fan, which can not only introduce outdoor air into the room, but also exhaust heated air from the HVAC equipment into the room for heating.

[0050] It should be noted that the external fan 200 is installed on the wall of the indoor space and is connected to the outdoor space.

[0051] Through the coordinated operation of the external fan 200 and the first fan 122, the equipment can continuously introduce fresh outdoor air, reduce indoor carbon dioxide concentration, increase oxygen content, and thus improve indoor air quality. Due to the introduction of fresh air, the equipment avoids the problem of air dryness caused by heating, maintains suitable indoor air humidity, and reduces discomfort. Through reasonable air circulation design, the equipment achieves efficient air exchange while providing warm air, reducing energy consumption.

[0052] During use:

[0053] After the user starts the device, the external fan 200 starts operating, drawing in outdoor air through the first inlet 203. The air drawn in by the external fan 200 enters the first fan 122 through the first air duct 310. After being heated, the first fan 122 delivers warm and fresh air into the room.

[0054] The second fan 121 draws air from the room and exhausts it to the outside through the second duct 320, completing the exhaust process through the second outlet 202. Compared to relying solely on the external fan 200 to blow air from the room, the coordinated operation of the external fan 200 and the first fan 122 provides a dual power source. The simultaneous operation of the two fans increases the speed and volume of airflow, thereby accelerating the efficiency of air exchange.

[0055] The external fan 200 can effectively exhaust indoor air or introduce fresh air, while the first fan 122 can further promote the circulation and distribution of air in the room, ensuring that fresh air can be quickly and evenly diffused throughout the entire indoor environment.

[0056] In some possible implementations, the external structure 201 may be provided with a connecting structure 210, and the housing 110 may be provided with a mounting port 130, which may be connected to the second air duct 320.

[0057] The connecting structure 210 of the external structure 201 can be used to establish an airflow channel between the external structure 201 and the interior of the housing 110, while also providing a mechanical connection interface. As a transitional component for airflow transmission, the connecting structure 210 enables the second port 202 of the external structure 201 to form a complete airflow loop with the second fan 121 inside the housing 110 through the second air duct 320.

[0058] The mounting port 130 of the housing 110 can be used to connect the connecting structure 210, forming an assembly interface between the external structure 201 and the housing 110. The connection between the mounting port 130 and the second air duct 320 allows the indoor air discharged by the second fan 121 to enter the external structure 201 through the second air duct 320 and the mounting port 130, and finally be discharged to the outside through the second opening 202.

[0059] The location and size of the mounting port 130 can be matched with the connecting structure 210 to ensure smooth airflow while preventing air leakage or short-circuiting. In terms of assembly, the mounting port 130 can be connected to the connecting structure 210 via plug-in, flange connection, or sealing ring press-fit, and the specific implementation method can be adjusted according to the installation space and sealing requirements.

[0060] For example, the connecting structure 210 can be a straight pipe, a reducing pipe, or a transition section with guide vanes to accommodate different installation angles and space constraints. The mounting port 130 can be circular, rectangular, or other geometry adapted to the connecting structure 210, and its edges can be flanged or reinforced to improve structural strength. In addition, a sealing gasket or snap-fit ​​structure can be added to the joint between the connecting structure 210 and the mounting port 130 to enhance connection reliability and airtightness.

[0061] By using the connection structure 210 in conjunction with the mounting port 130, effective isolation and directional guidance of internal and external airflow can be achieved. On the one hand, the connection between the external structure 201 and the housing 110 will not interfere with the independent operation of the first air duct 310, avoiding cross-contamination between fresh air and exhaust air; on the other hand, the modular connection method facilitates the installation and maintenance of the external structure 201, while ensuring the compactness of the overall structure.

[0062] In some possible implementations, the housing 110 may extend along a first direction, and the external structure 201 may be disposed on one side of the housing 110 along the first direction. The first direction can serve as a reference axis for the layout of HVAC equipment, and the housing 110 extending along the first direction can provide an axial reference for the arrangement of internal fans. The external structure 201 being disposed on one side of the housing 110 along the first direction allows the external structure 201 to be directly close to external connecting parts such as building exterior walls or ventilation shafts, while maintaining a smooth connection with the internal air ducts of the housing 110.

[0063] The first fan 122 and the second fan 121 can be arranged along the first direction, with the first fan 122 being farther away from the external structure 201 relative to the second fan 121. The arrangement of the first fan 122 being farther away from the external structure 201 relative to the second fan 121 allows the fresh air to obtain sufficient flow space before entering the first fan 122, which is beneficial to the stability and uniform distribution of airflow.

[0064] In some possible implementations, the height of the first opening 203 in the height direction of the external structure 201 can be lower than the height of the second opening 202. Due to the natural sinking effect of low-temperature air, the first opening 203, positioned at a lower location, more easily obtains fresh air with a relatively stable temperature. The second opening 202, located at a higher location, can utilize the principle of hot air rising, allowing the warm and humid airflow exhausted from the room to rise naturally and be smoothly discharged outdoors from a higher position. The height difference between the first opening 203 and the second opening 202 can create a natural air convection-promoting effect.

[0065] When the HVAC equipment is running, outdoor air can enter through the first inlet 203 at a lower position, and indoor air that needs to be exhausted can be exhausted through the second inlet 202 at a higher position. Fresh air and exhaust air maintain independent paths when flowing through the external structure 201, which can avoid mutual interference between the incoming and outgoing airflows, reduce airflow turbulence, improve the efficiency of air exchange, and thus enhance the ability to regulate the indoor environment, such as more effectively regulating the indoor temperature.

[0066] In some possible implementations, the first air duct 310 and the second air duct 320 can be independently configured within the housing 110. The independent configuration of the first air duct 310 and the second air duct 320 can constitute a dual-channel airflow isolation system, which ensures the isolation of the fresh air introduction path and the exhaust air outlet path through physical separation, avoiding the risk of cross-contamination between the two airflows inside.

[0067] The first air duct 310 is used to transport fresh outdoor air introduced by the external fan 200. Its inlet end is sealed to the air outlet side of the external fan 200, and its outlet end extends to the air inlet side of the first fan 122, forming a complete fresh air transport channel. The second air duct 320 is used to exhaust stale indoor air. Its inlet end is connected to the air outlet side of the second fan 121, and its outlet end extends to the second opening 202 of the external structure 201, forming a closed exhaust path.

[0068] In some possible implementations, the external structure 201 may be provided with a partition plate, which can separate the external structure 201 into a first chamber and a second chamber that are independent of each other. The partition plate can establish completely independent airflow processing spaces inside the external structure 201 through physical isolation. The partition plate can be arranged to extend along the inner cavity of the external structure 201, dividing the internal volume into a first chamber and a second chamber that are not interconnected.

[0069] For example, the partition can be a one-piece metal partition, with its edges tightly fitted to the inner wall of the external structure 201 via elastic seals to ensure a complete seal between the two chambers. The partition can be installed using methods including, but not limited to, welding, bolting, or snap-fit ​​assembly. In some applications, the partition can be designed as an adjustable, movable structure, allowing for optimization of the spatial allocation ratio between the two chambers by changing its tilt angle.

[0070] The first chamber connects to the first opening 203 and the first air duct 310, and the external fan 200 is located inside the first chamber. The second chamber connects to the second opening 202 and the second air duct 320. The first chamber can be used for fresh air treatment, housing the external fan 200 and connecting to the first opening 203 and the first air duct 310, forming a channel for introducing outdoor fresh air. The second chamber can be used for indoor exhaust air, connecting to the second opening 202 and the second air duct 320, forming a path for exhausting indoor air. The arrangement of the first and second chambers can prevent cross-contamination between fresh air and exhaust air inside the external structure 201.

[0071] refer to Figure 4 In some possible implementations, the external structure 201 may be provided with a mounting structure 400, through which the external structure 201 can be fixed to the housing 110. The mounting structure 400 can establish a reliable mechanical connection between the external structure 201 and the housing 110, while ensuring that the airflow channels between the external structure 201 and the housing 110 can be connected.

[0072] For example, the mounting structure 400 can be designed as an annular frame surrounding the airflow channel, with the inner side forming a continuation of the airflow channel and the outer side having fixing features such as bolt holes or clips. Alternatively, the mounting structure 400 can be configured as a mounting lug extending from the side wall of the external structure 201, which is fixed to the corresponding connecting seat on the housing 110 by fasteners. The main body 100 of the mounting structure 400 can be made of the same metal material as the housing to ensure structural strength, and the connection with the housing body can be achieved by welding, riveting, or integral molding.

[0073] By setting the installation structure 400, the external structure 201 and the housing 110 can be quickly disassembled and assembled, which facilitates the transportation and maintenance of the equipment. At the same time, it ensures the sealing performance of the connection parts to prevent air leakage or the infiltration of external pollutants. It can also provide the necessary structural support so that the external structure 201 can stably bear the operating load of the external fan 200 and other internal components.

[0074] In some possible implementations, the mounting structure 400 can be inserted into the housing 110, the mounting structure 400 is disposed on at least one connector, and the mounting structure 400 can be fixed to the housing 110 via the connector.

[0075] As can be seen, the mounting structure 400 can be inserted into the housing 110, making the installation process simpler and faster, while ensuring the stability of the equipment. The connectors are used to secure the mounting structure 400 to the housing 110, providing additional stability and safety.

[0076] It should be noted that the connectors can be bolts, clips, clamps, etc., and the specific choice depends on the design requirements. The housing 110 can be designed with an interface or slot suitable for the insertion of the mounting structure 400 to ensure that the mounting structure 400 can be firmly inserted and fixed.

[0077] With its plug-in design, the mounting structure 400 can be quickly inserted into the housing 110, simplifying the installation process and saving time and manpower. The use of connectors ensures a stable connection between the mounting structure 400 and the housing 110, reducing vibration and displacement of the equipment during operation.

[0078] In some possible implementations, when the external structure 201 is fixed relative to the housing 110, the connecting structure 210 is connected to the first air duct 310 and the connecting structure 210 is connected to the second air duct 320.

[0079] It can be understood that the first air duct 310 and the second air duct 320 can be used to guide airflow, one of which can serve as a channel for introducing fresh air and the other as a channel for exhausting indoor air.

[0080] The connecting structure 210 can be connected to the first air duct 310 and the second air duct 320 at the same time, ensuring that the airflow of the external fan 200 can be effectively distributed and guided within the housing 110.

[0081] Through the design of the first air duct 310 and the second air duct 320, the equipment can achieve more efficient air flow and distribution, improve the efficiency of fresh air introduction and stale air exhaust, and effectively improve indoor air quality; through the multi-air duct design, the HVAC equipment can flexibly adjust the air flow path as needed to adapt to different environmental requirements.

[0082] In some possible implementations, the first fan 122 is connected to the first air duct 310 and can be connected to the mounting port 130 through the first air duct 310; the second fan 121 is connected to the second air duct 320 and can be connected to the mounting port 130 through the second air duct 320.

[0083] It is known that the first fan 122 is connected to the first air duct 310, providing power for the airflow in the first air duct 310. The second fan 121 is connected to the second air duct 320, providing power for the airflow in the second air duct 320.

[0084] With independent first air duct 310 and second air duct 320, the HVAC equipment can simultaneously introduce fresh air and exhaust indoor air, ensuring the independence and efficiency of air flow. Even without turning on the external fan 200, indoor and outdoor air can be exchanged through the operation of the first fan 122 and the second fan 121 themselves. Of course, by controlling the operation of the external fan 200, the efficiency of indoor and outdoor air exchange can be significantly improved compared to relying solely on the operation of the first fan 122 and the second fan 121.

[0085] In some possible implementations, the housing 110 is provided with a ventilation panel 500, which can be directed toward the indoor environment; the ventilation panel 500 extends along a first direction, and a first fan 122 and a second fan 121 are arranged sequentially at intervals along the first direction.

[0086] Understandably, the design of the ventilation panel 500 allows the HVAC equipment to face directly into the room, ensuring that heated air can be effectively delivered into the indoor space. The extension direction of the ventilation panel 500 determines the overall layout of the equipment, making the airflow path more linear and efficient.

[0087] The first fan 122 and the second fan 121 are arranged at intervals along the first direction, which optimizes the use of space inside the equipment and ensures that each fan can effectively perform its function. The first fan 122 is responsible for sending heated air into the room and fresh outdoor air into the room, while the second fan 121 can be used to assist airflow or exhaust indoor air.

[0088] This arrangement allows the equipment to form a continuous airflow path, reducing airflow resistance and improving overall heating and ventilation efficiency.

[0089] In some possible implementations, the ventilation panel 500 is provided with a ventilation opening 510, which includes an air outlet and an air inlet spaced apart.

[0090] The air outlet is connected to the air outlet of the first fan 122, and the air inlet is connected to the air inlet of the second fan 121. The presence of the vent 510 allows heated air to enter the room through the ventilation panel 500, forming an effective airflow path.

[0091] The air outlets and inlets are spaced apart on the vent 510, allowing the HVAC equipment to simultaneously output and input air, forming a complete air circulation system.

[0092] It should be noted that the air outlet can refer to the opening position on the vent corresponding to the first fan 122, and the air inlet can refer to the opening position corresponding to the second fan 121.

[0093] Ventilation outlet 510 allows for the spatial arrangement of air outlets and air inlets, avoiding direct mixing of supply and return airflows and ensuring efficient indoor air circulation.

[0094] By setting vents 510 on the ventilation panel 500, the device can form a direct airflow path from the heating element to the room, reducing airflow resistance, reducing heat loss, and improving the heating efficiency of the device. Through the optimized airflow path, the device can distribute heated air more evenly, improve indoor airflow, and enhance comfort. By setting the air outlet and air inlet at intervals, the device can effectively manage airflow, reduce airflow interference, and improve air exchange efficiency.

[0095] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0096] In the description of this utility model, it should be understood that the terms "comprising" and "having" as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0097] Unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heating, ventilation, and air conditioning (HVAC) device, characterized in that, It includes the main body (100), an external fan (200), and an external structure (201); The main body (100) includes a housing (110), and a first fan (122) and a second fan (121) disposed within the housing (110); The external structure (201) accommodates the external fan (200), and the external structure (201) has a first opening (203) and a second opening (202) communicating with the outside. The air inlet side of the external fan (200) is connected to the first opening (203), and the air outlet side of the external fan (200) can be connected to the air inlet side of the first fan (122) through the first air duct (310); the air outlet side of the first fan (122) can discharge air into the room. The air inlet side of the second fan (121) is connected to the room, and the air outlet side of the second fan (121) can be connected to the second opening (202) through the second air duct (320).

2. The HVAC equipment according to claim 1, characterized in that, The external structure (201) is provided with a communication structure (210), and the housing (110) is provided with an installation port (130), which is connected to the second air duct (320).

3. The HVAC equipment according to claim 1, characterized in that, The housing (110) extends along a first direction, and the external structure (201) is disposed on one side of the housing (110) along the first direction; The first fan (122) and the second fan (121) are arranged along the first direction, with the first fan (122) being farther away from the external structure relative to the second fan (121).

4. The HVAC equipment according to claim 3, characterized in that, In the height direction of the external structure (201), the height of the first port (203) is lower than the height of the second port (202).

5. The HVAC equipment according to claim 1, characterized in that, Within the housing (110), the first air duct (310) and the second air duct (320) are independently configured.

6. The HVAC equipment according to claim 5, characterized in that, The external structure (201) is provided with a partition plate, which separates the external structure (201) into a first chamber and a second chamber that are independent of each other; The first chamber is connected to the first opening (203) and the first air duct (310), and the external fan (200) is located in the first chamber; the second chamber is connected to the second opening (202) and the second air duct (320).

7. The HVAC equipment according to any one of claims 1-6, characterized in that, The external structure (201) is provided with an installation structure (400), and the external structure (201) can be fixed to the housing (110) through the installation structure (400).

8. The HVAC equipment according to claim 7, characterized in that, The mounting structure (400) can be inserted into the housing (110), the mounting structure (400) is disposed on at least one connector, and the mounting structure (400) can be fixed to the housing (110) through the connector.

9. The HVAC equipment according to claim 8, characterized in that, The housing (110) is provided with a ventilation panel (500) which can be oriented toward the indoor environment; The ventilation panel (500) extends along a first direction, and the first fan (122) and the second fan (121) are arranged at intervals along the first direction.

10. The HVAC equipment according to claim 9, characterized in that, The ventilation panel (500) is provided with a ventilation opening (510), which includes an air outlet and an air inlet spaced apart. The air outlet is connected to the air outlet of the first fan (122), and the air inlet is connected to the air inlet of the second fan (121).

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