Indoor air handling system

Abstract

The present specification relates to the technical field of indoor air treatment, and specifically discloses an indoor air treatment system, comprising an outdoor unit, an indoor air treatment main unit, an indoor air delivery end, an indoor radiation end and a forced convection heat exchange end; the indoor air treatment main unit comprises a first heat exchanger and a second heat exchanger; the first heat exchanger comprises a first refrigerant flow channel and a water flow channel, water in the water flow channel can exchange heat with refrigerant in the first refrigerant flow channel, and the water flow channel can selectively communicate with the indoor radiation end and the forced convection heat exchange end; the second heat exchanger comprises a second refrigerant flow channel and an air flow channel, air flowing through the air flow channel can exchange heat with refrigerant in the second refrigerant flow channel; the indoor air treatment main unit comprises an air inlet, an air outlet and a fan, air flowing into the air inlet can flow through the air flow channel under the driving of the fan and then flow out from the air outlet to the indoor air delivery end. The above system can meet the requirements of users on the processing efficiency and operating noise of indoor air treatment in different scenarios.

Description

Technical Field

[0001] This specification relates to the field of indoor air treatment technology, and in particular to an indoor air treatment system. Background Technology

[0002] Indoor air handling systems include air systems and water systems. These systems regulate indoor temperature and humidity using air and water, but there is still no effective solution to better meet users' requirements for air handling efficiency and operating noise. Utility Model Content

[0003] This specification provides an indoor air handling system to address the problem that existing indoor air handling systems often fail to meet users' demands for air handling efficiency and operating noise.

[0004] This specification provides an indoor air handling system, which includes an outdoor unit, an indoor air handling unit, an indoor air delivery terminal, and a water circulation terminal; the water circulation terminal includes at least an indoor radiant terminal and a forced convection heat exchange terminal, and the heat exchange efficiency of the indoor radiant terminal is lower than that of the forced convection heat exchange terminal. The indoor air handling unit includes a first heat exchanger and a second heat exchanger; the first heat exchanger includes a first refrigerant channel and a water channel, wherein the water in the water channel can exchange heat with the refrigerant in the first refrigerant channel, and the water channel can selectively connect to the indoor radiant terminal and the forced convection heat exchange terminal; the second heat exchanger includes a second refrigerant channel and an air channel, wherein the air flowing through the air channel can exchange heat with the refrigerant in the second refrigerant channel; The indoor air handling unit includes an air inlet, an air outlet, and a fan. Air flowing in from the air inlet can flow through the air channel under the drive of the fan and then flow out from the air outlet to the indoor air delivery terminal. The first refrigerant channel and the second refrigerant channel can be connected to the refrigerant inlet and refrigerant outlet of the outdoor unit. The refrigerant output from the refrigerant outlet can be distributed to the first refrigerant channel and / or the second refrigerant channel.

[0005] In one embodiment, the indoor air handling unit includes a separate air handling module and an air supply module, wherein the air supply module is partially or entirely installed above the ceiling, and the air handling module is wall-mounted below the ceiling. The air handling module has a first housing, in which a first heat exchanger and a second heat exchanger are disposed. The air supply module has a second housing, in which a fan is disposed. The first housing has an air inlet and an air outlet, and the second housing has an air inlet and an air outlet. The air outlet and the air inlet are connected by an air duct.

[0006] In one embodiment, the first housing has a lateral dimension in the lateral direction and a longitudinal dimension in the longitudinal direction, wherein the lateral dimension is greater than the longitudinal dimension; The air handling module is installed against the wall and positioned horizontally. The first heat exchanger and the second heat exchanger are arranged laterally in the first housing.

[0007] In one embodiment, the first refrigerant channel, the second refrigerant channel, and the water channel all pass through the top wall of the first housing, or the first refrigerant channel, the second refrigerant channel, and the water channel are all located inside the first housing, and the refrigerant channel of the outdoor unit passes through the top wall of the first housing.

[0008] In one embodiment, the air handling module further includes an air purification unit, wherein the air purification unit, the first heat exchanger, and the second heat exchanger are arranged laterally in the first housing; The front sidewall of the first housing is removable or can be opened to remove the air purification unit; The air inlet includes a fresh air inlet and a return air inlet. Along the direction of air flow, the air inlet, the first heat exchanger, the second heat exchanger, and the air purification unit are arranged horizontally in sequence. The first heat exchanger is vertically positioned close to or adjacent to the rear side wall of the first housing.

[0009] In one embodiment, the indoor air handling unit includes an air handling module and an air supply module connected to each other. The air handling module has a first housing with an air inlet. The air supply module is used to allow indoor air to enter the air handling module from the air inlet. The first housing also has an opening, and the first housing further includes a first opening and closing structure, which is disposed at the opening to open and close the opening. The air handling module also includes a mating structure for sealing and adapting to the first opening and closing structure. When the first opening and closing structure is in the position of closing the opening, the first opening and closing structure and the mating structure are sealed and adapted at the connection; The first housing is provided with a heat exchanger and / or a filter element, and indoor air entering from the air inlet can pass through the heat exchanger and / or the filter element; the heat exchanger includes the first heat exchanger and the second heat exchanger; Along the direction of indoor air flow within the first housing, at least a portion of the connection is located upstream of the heat exchanger and / or the filter element, or at least a portion of the connection is disposed corresponding to the heat exchanger and / or the filter element.

[0010] In one embodiment, the first opening and closing structure includes a door body having opposing left and right sides, and opposing upper and lower sides, and the door body is rotatable relative to the opening; When the first opening and closing structure is in the position of closing the opening, the left side, the right side, the upper side, and the lower side are all sealed and adapted to the mating structure at the connection point. The position where the left side or the right side is sealed and adapted to the mating structure is located upstream of the heat exchanger and / or the filter element or corresponds to the heat exchanger and / or the filter element.

[0011] In one embodiment, the first opening / closing structure includes a first door body and a second door body; The first door has a first left side and a first right side, and a first upper side and a first lower side. The first door can rotate to the left relative to the opening. The first left side, the first right side, the first upper side, and the first lower side are all sealed and adapted to the mating structure at the connection. At least the position where the first right side is sealed and adapted to the mating structure is located upstream of the heat exchanger and / or the filter element or corresponds to the heat exchanger and / or the filter element. The second door has a second left side and a second right side, and a second upper side and a second lower side. The second door can rotate to the right relative to the opening. The second left side, the second right side, the second upper side, and the second lower side are all sealed and adapted to the mating structure at the connection. At least the position where the second left side is sealed and adapted to the mating structure is located upstream of the heat exchanger and / or the filter element or corresponds to the heat exchanger and / or the filter element. The mating structure includes a mating plate connected to the heat exchanger or the first housing. The first right side portion is located upstream of the heat exchanger and / or the filter element or corresponds to the heat exchanger and / or the filter element in a sealing and adapting position with the mating plate. The second left side portion is located upstream of the heat exchanger and / or the filter element or corresponds to the heat exchanger and / or the filter element in a sealing and adapting position with the mating plate.

[0012] In one embodiment, the indoor air handling unit includes an air supply module, which is used to supply air to the indoor air delivery terminal through an air duct; The air supply module includes a second housing, and the fan is disposed inside the second housing. The second housing has an air inlet and an air outlet. The air outlet is used to connect with the air duct. Air entering from the air inlet can flow to the indoor air delivery terminal through the air outlet and the air duct under the drive of the fan. The fan includes a volute and an impeller. The volute has a volute inlet and a volute outlet. The volute outlet is spaced at a predetermined distance from the air outlet. A first noise reduction and flow guiding device is provided between the volute outlet and the air outlet. Alternatively, the side of the volute near the air inlet is spaced at a predetermined distance from the air inlet, and a second noise reduction and flow guiding device is provided between the side of the volute near the air inlet and the air inlet.

[0013] In one embodiment, a first noise reduction and airflow guiding device is provided between the volute outlet and the air outlet. The inner surface of the first noise reduction and airflow guiding device, the volute outlet, the air outlet, and the second housing form an airflow channel, and the flow area of ​​the airflow channel tends to decrease. A cavity is formed between the outer surface of the first noise reduction and diversion device and the second housing, and sound-absorbing cotton and / or sound-insulating cotton are disposed in the cavity.

[0014] In one embodiment, a first noise reduction and airflow guiding device is provided between the volute outlet and the air outlet. The first noise reduction and airflow guiding device includes at least two noise reduction and airflow guiding plates, which are arranged relatively at intervals, and the distance between the two noise reduction and airflow guiding plates tends to decrease along the direction of airflow. The two noise-reducing guide plates, the volute outlet, the air outlet, and the second housing form an airflow channel, and the flow area of ​​the airflow channel tends to decrease.

[0015] In one embodiment, a first noise reduction and flow guiding device is provided between the volute outlet and the air outlet, and the air supply module further includes a partition, the partition and part of the second housing forming a first static pressure box, and the first noise reduction and flow guiding device is located inside the first static pressure box. The volute outlet is fixed to the partition plate, and the partition plate is provided with through holes for air to pass through; A shock-absorbing structure and / or a sealing structure are provided between the periphery of the partition and the inner surface of the second housing, and / or a shock-absorbing structure and / or a sealing structure are provided between the partition and the volute outlet.

[0016] In one embodiment, a second noise reduction and flow guiding device is provided between the side of the volute of the fan near the air inlet and the air inlet. The rotation shaft of the impeller extends in the longitudinal direction. The second noise reduction and flow guiding device is obliquely arranged in the longitudinal direction between the air inlet and the volute inlet to guide the air flowing in from the air inlet to the volute inlet. The volute inlet is positioned downwards, and the second noise reduction and airflow guiding device is positioned obliquely downwards between the air inlet and the volute inlet.

[0017] In one embodiment, the indoor air handling unit includes an air handling module and an air supply module connected to each other. The air handling module has a first housing, in which a first heat exchanger and a second heat exchanger are disposed. The air supply module has a second housing, in which a fan is disposed. The first housing is provided with an air inlet and an air outlet, and the second housing is provided with an air inlet and an air outlet. The indoor air handling system also includes a noise-reducing duct; the exhaust port and the air inlet are connected through the noise-reducing duct; the air outlet is connected to the noise-reducing duct to deliver air to the indoor air delivery terminal. The noise reduction duct includes an inner sound-absorbing duct and an outer sound-insulating duct, with the outer sound-insulating duct located outside the inner sound-absorbing duct. The inner sound-absorbing duct includes a first duct and a second duct, the first duct is located inside the second duct, and a first noise-reducing cotton is provided between the first duct and the second duct; The outer sound insulation duct includes a third duct and a fourth duct, the third duct is located inside the fourth duct, and a second noise reduction cotton is provided between the third duct and the fourth duct; The first tube and / or the third tube are provided with openings; or, the thickness of the second noise-reducing cotton is less than or equal to the thickness of the first noise-reducing cotton.

[0018] In one embodiment, the forced convection heat exchange terminal includes a fan coil unit and / or a cooling beam; The indoor radiant terminals include floor radiant terminals and / or ceiling radiant terminals.

[0019] The technical solution in this specification has the following significant advantages: This specification provides an indoor air handling system, including an outdoor unit, an indoor air handling unit, an indoor air delivery terminal, an indoor radiant terminal, and a forced convection heat exchange terminal. The indoor air handling unit includes a first heat exchanger and a second heat exchanger. The first heat exchanger includes a first refrigerant channel and a water channel, where water in the water channel exchanges heat with the refrigerant in the first refrigerant channel. The water channel can selectively connect to the indoor radiant terminal and the forced convection heat exchange terminal. The second heat exchanger includes a second refrigerant channel and an air channel, where air flowing through the air channel exchanges heat with the refrigerant in the second refrigerant channel. The indoor air handling unit includes an air inlet, an air outlet, and a fan. Air flowing in from the air inlet, driven by the fan, flows through the air channel and exits from the air outlet to the indoor air delivery terminal. The heat exchange efficiency of the indoor radiant terminal is lower than that of the forced convection heat exchange terminal. The operating noise of the indoor radiant terminal is lower than that of the forced convection heat exchange terminal. When the indoor air handling system is used for heating or cooling, the water flow channel can be selectively connected to the indoor radiant terminal and the forced convection heat exchange terminal according to the user's requirements for heat exchange efficiency and operating noise.

[0020] For example, in one scenario, a user wants rapid cooling (e.g., while cooking in the kitchen). To meet this need, the water flow channel can be connected only to the forced convection heat exchange terminal, or it can be connected to both the forced convection heat exchange terminal and the indoor radiant terminal. In another scenario, a user requires the indoor air handling system to operate with low noise (e.g., while resting in the bedroom). To meet this need, the water flow channel can be connected only to the indoor radiant terminal, allowing the indoor air to be cooled or heated via the indoor radiant terminal or via both the indoor air delivery terminal and the indoor radiant terminal.

[0021] The system described above can meet users' requirements for indoor air treatment efficiency and operating noise in different scenarios. Users can flexibly switch between high-efficiency mode and silent mode according to different scenarios. In silent mode (such as for use in bedrooms and studies at night), the water channel can be connected only to the indoor radiant terminal, utilizing its silent operation to achieve near-zero noise cooling / heating, greatly ensuring the quality of sleep and rest. In high-efficiency mode (such as for use in living rooms and kitchens during the day), the water channel can be connected to the forced convection heat exchange terminal or simultaneously to both the indoor radiant terminal and the forced convection heat exchange terminal, utilizing the high-efficiency heat exchange capacity of the forced convection heat exchange terminal to quickly reach the set temperature. Although there is some operating noise, it is suitable for active areas where quietness requirements are not high.

[0022] Furthermore, the aforementioned indoor air handling system integrates three types of terminals: indoor air delivery terminals, indoor radiant terminals, and forced convection heat exchange terminals, for indoor air treatment. Indoor radiant terminals provide gentle radiant cooling / heating, ensuring uniform room temperature, eliminating drafts, and providing a comfortable experience, avoiding the discomfort caused by direct airflow from traditional air conditioners. Forced convection heat exchange terminals provide rapid cooling / heating to address scenarios requiring urgent cooling or heating. Indoor air delivery terminals and air ducts introduce fresh air and process it (temperature regulation, dehumidification, and purification), ensuring clean and fresh indoor air. By integrating these three types of terminals, comprehensive and precise regulation of indoor temperature, humidity, and air cleanliness is achieved, providing a comfort experience far exceeding that of traditional single air conditioning or underfloor heating systems.

[0023] Furthermore, the most suitable terminal can be selected based on demand. Forced convection heat exchange terminals have high heat exchange efficiency and are used in applications requiring rapid response, avoiding long-term high-power operation in pursuit of speed, thus resulting in greater energy savings; while indoor radiant terminals have lower heat exchange efficiency, they provide a better user experience once the temperature is stabilized. When extremely high efficiency is required, the indoor air handling system can allow all terminals to work together to complete indoor temperature regulation in the shortest possible time.

[0024] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0025] It should be emphasized that the term "comprising / including" as used herein refers to the presence of a feature, part, or component, but does not exclude the presence or addition of one or more other features, parts, or components. Attached Figure Description

[0026] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances. In the drawings: Figure 1 A schematic diagram of the structure of an indoor air handling system according to one embodiment of this specification is shown; Figure 2 A schematic diagram of the structure of an indoor air handling system according to one embodiment of this specification is shown; Figure 3This specification shows an installation diagram of an indoor air handling unit applied to a flat balcony according to one embodiment of the present specification; Figure 4 An isometric view of the air handling module in an indoor air handling unit according to one embodiment of this specification is shown; Figure 5 An exploded view of the air handling module in an indoor air handling unit according to one embodiment of this specification is shown; Figure 6 This specification shows a schematic diagram of the internal structure layout of the indoor air handling unit in one embodiment; Figure 7 An isometric view of the air handling module in an indoor air handling unit according to one embodiment of this specification is shown; Figure 8 An exploded view of the air handling module in an indoor air handling unit according to one embodiment of this specification is shown; Figure 9 This specification shows a schematic diagram of the internal structure layout of the indoor air handling unit in one embodiment; Figure 10 This specification shows a schematic diagram of the internal structure of the indoor air handling unit after the electrical control box is hidden in one embodiment; Figure 11 An isometric view of another air handling module in an indoor air handling unit according to one embodiment of this specification is shown; Figure 12 An exploded view of another air handling module in an indoor air handling unit according to one embodiment of this specification is shown; Figure 13 A schematic diagram showing the distribution of seals in an indoor air handling unit according to one embodiment of this specification is shown; Figure 14 This specification shows a schematic diagram of the air supply module in an indoor air handling unit according to one embodiment; Figure 15 An exploded view of the air supply module in an indoor air handling unit according to one embodiment of this specification is shown; Figure 16 This specification shows one of the top views of the air supply module in an indoor air handling unit after removing the top cover, according to one embodiment of the specification. Figure 17 This specification shows a second top view of the air supply module in an indoor air handling unit after removing the top cover plate, according to one embodiment of this specification. Figure 18 A schematic diagram of the internal structure of the noise reduction guide plate in one embodiment of this specification is shown; Figure 19 A front view of a noise-reducing duct is shown in one embodiment of this specification; Figure 20A longitudinal sectional view of a noise-reducing duct according to one embodiment of this specification is shown; Figure 21 A cross-sectional view of a noise-reducing duct is shown in one embodiment of this specification.

[0027] The reference numerals in the above figures are as follows: 100. Outdoor unit; 1. Compressor; 11. Refrigerant inlet; 12. Refrigerant outlet; 200. Indoor air handling unit; 21. First heat exchanger; 211. First refrigerant channel; 212. Water channel; 213. Water pump; 22. Second heat exchanger; 221. Second refrigerant channel; 222. Air channel; 23. Fan; 24. Refrigerant flow distribution assembly; 31. Indoor air delivery terminal; 310. Air valve; 32. Indoor radiant terminal; 321. Ground radiant terminal; 33. Forced convection heat exchange terminal; 34. Air quality detection device; 4. Air handling module; 40. First housing; 401. Front side wall; 402. Rear side wall; 403. Top wall; 404. Bottom wall; 405. Left side wall; 406. Right side wall; 411. Fresh air inlet; 412. Return air inlet; 413. Exhaust air outlet; 41. Fresh air fan; 43. Air purification unit; 45. Heating unit; 46. Electrical control box; 410. Opening; 420. First opening and closing structure; 421. Left side; 422. Right side; 423. Upper side; 424. Lower side; 430. First door body; 431, First left side; 432, First right side; 433, First upper side; 434, First lower side; 440, Second door body; 441, Second left side; 442, Second right side; 443, Second upper side; 444, Second lower side; 450, Mating plate; 460, Edge; 470, Upper fastening structure; 480, Lower fastening structure; 490, Fresh air duct; 491, Fresh air filter; 492, Magnetic adsorption plate; 414, First filter; 415, Second filter; 5. Air supply module; 50. Second housing; 501. Air inlet; 502. Air outlet; 51. Air supply fan; 510. Volute; 511. First volute; 512. Second volute; 516. Partition; 5101. Volute inlet; 5102. Volute outlet; 53. First noise reduction and airflow guiding device; 530. Noise reduction and airflow guiding plate; 5302. First opening; 531. Air passage; 532. Sound-absorbing cotton and / or sound-insulating cotton; 54. Second noise reduction and airflow guiding device; 55. Arc-shaped air guide; 56. First static pressure box; 57. Air inlet plate; 58. Air outlet plate; 591. Top cover plate; 592. Side frame; 600. Balcony; 6. Ceiling; 61. First refrigerant connection pipe; 62. Second refrigerant connection pipe; 610. First set of openings; 620. Second set of openings; 63. Clean water inlet pipe; 64. Solenoid valve; 65. Wet film humidifier; 66. First drip tray; 67. Second drip tray; H1. Distance from the ground; W1. Distance from the wall; X. Horizontal direction; Y. Height direction; Z. Depth; 71. First seal; 72. Second seal; 9. Aluminum foil; 8. Noise-reducing air duct; 81. Inner layer sound-absorbing air duct; 811. First duct; 812. Second duct; 813. First noise-reducing cotton; 82. Outer layer sound-insulating air duct; 821. Third duct; 822. Fourth duct; 823. Second noise-reducing cotton; 83. Second opening; 84. Rigid frame. Detailed Implementation

[0028] The principles and spirit of this specification will now be described with reference to several exemplary embodiments. It should be understood that these embodiments are given merely to enable those skilled in the art to better understand and implement this specification, and are not intended to limit the scope of this specification in any way. Rather, these embodiments are provided to make this disclosure more thorough and complete, and to fully convey the scope of this disclosure to those skilled in the art.

[0029] The details of this utility model can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of this utility model described herein are only for explaining the purpose of this utility model and should not be construed as limiting this utility model in any way. Under the teachings of this utility model, those skilled in the art can conceive of any possible modifications based on this utility model, and these should all be considered to fall within the scope of this utility model. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "connected" should be interpreted broadly, for example, it can be a mechanical connection or an electrical connection, or it can be a connection within two elements, which can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this specification. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] This specification also provides an indoor air handling system through its embodiments. For example... Figure 1 and Figure 2 As shown, the indoor air handling system includes an outdoor unit 100, an indoor air handling unit 200, an indoor air delivery terminal 31, and a water circulation terminal. The water circulation terminal may include an indoor radiant terminal 32 and a forced convection heat exchange terminal 33. The indoor air handling unit 200 includes a first heat exchanger 21 and a second heat exchanger 22. The first heat exchanger 21 includes a first refrigerant channel 211. The second heat exchanger 22 includes a second refrigerant channel 221. The first refrigerant channel 211 and the second refrigerant channel 221 can be connected to the refrigerant inlet 11 and the refrigerant outlet 12 of the outdoor unit 100. The refrigerant output from the refrigerant outlet 12 can be selectively distributed to the first refrigerant channel 211 and / or the second refrigerant channel 221. The first heat exchanger 21 also includes a water channel 212. The water in the water channel 212 can exchange heat with the refrigerant in the first refrigerant channel 211. The water flow channel 212 can be selectively connected to the indoor radiant terminal 32 and the forced convection heat exchange terminal 33. The second heat exchanger 22 also includes an air flow channel 222. The air flowing through the air flow channel 222 can exchange heat with the refrigerant in the second refrigerant flow channel 221. The indoor air handling unit 200 includes an air inlet, an air outlet 502 and a fan 23. The air flowing in from the air inlet can flow through the air flow channel 222 under the drive of the fan 23 and then flow out from the air outlet 502 to the indoor air delivery terminal 31.

[0032] The indoor air handling system provided in this application embodiment may mainly include: an outdoor unit 100, an indoor air handling host 200, an indoor air delivery terminal 31, an indoor radiant terminal 32, and a forced convection heat exchange terminal 33.

[0033] The outdoor unit 100 may include a compressor 1, a heat exchange unit, a throttling unit, and a reversing valve. The outdoor unit 100 has a refrigerant inlet 11 and a refrigerant outlet 12. The refrigerant inlet 11 and refrigerant outlet 12 can be connected to the indoor air handling unit 200 via refrigerant connecting pipes, and cooperate with the indoor air delivery terminal 31, indoor radiant terminal 32, and forced convection heat exchange terminal 33 to achieve the functions of regulating indoor temperature, humidity, and air cleanliness.

[0034] The indoor air handling unit 200 may mainly include a first heat exchanger 21 and a second heat exchanger 22. The first heat exchanger 21 may include a first refrigerant channel 211 and a water channel 212. The water channel 212 can selectively connect to an indoor radiant terminal 32 and a forced convection heat exchange terminal 33. The heat exchange efficiency of the indoor radiant terminal 32 is lower than that of the forced convection heat exchange terminal 33. The operating noise of the indoor radiant terminal 32 is lower than that of the forced convection heat exchange terminal 33.

[0035] When the indoor air handling system is used for heating or cooling, the water flow channel 212 can be selectively connected to the indoor radiant terminal 32 and the forced convection heat exchange terminal 33, depending on the user's requirements for heat exchange efficiency and operating noise. For example, in one scenario, if the user wants to cool down quickly (e.g., while cooking in the kitchen), to meet this need, the water flow channel 212 can be connected only to the forced convection heat exchange terminal 33, or to both the forced convection heat exchange terminal 33 and the indoor radiant terminal 32, to achieve rapid cooling. In another scenario, if the user requires low-noise operation (e.g., while resting in the bedroom), to meet this need, the water flow channel 212 can be connected only to the indoor radiant terminal 32 to cool or heat the indoor air through the radiant terminal 32.

[0036] In one embodiment, the indoor radiant terminal 32 may include a floor radiant terminal 321, a wall radiant terminal, and / or a ceiling radiant terminal.

[0037] In one embodiment, the water flow channel 212 can be connected to the inlet and outlet of the forced convection heat exchange terminal 33. For example, the water flow channel 212 of the first heat exchanger 21 can be connected to the outlet pipe and the return pipe. The outlet pipe can be connected to the inlet of the forced convection heat exchange terminal 33, and the outlet of the forced convection heat exchange terminal 33 can be connected to the return pipe. The forced convection heat exchange terminal 33 can accelerate heat transfer through forced convection, allowing the indoor temperature to quickly reach the required temperature. The heat exchange efficiency of the forced convection heat exchange terminal 33 is higher than that of the indoor radiant terminal 32, and its operating noise is also higher than that of the indoor radiant terminal 32. In one embodiment, the forced convection heat exchange terminal 33 may include a fan coil unit and / or a cooling beam. Of course, the specific form of the forced convection heat exchange terminal 33 is not limited to the examples above. Other forms are also possible. Those skilled in the art may make other changes based on the technical essence of this application. However, as long as the function and effect achieved are the same as or similar to those of this application, they should all be covered within the scope of protection of this application. Taking the forced convection heat exchange terminal 33 as a fan coil unit as an example, in use, the indoor air is cooled (heated) after passing through the cold water (hot water) coil to maintain a constant room temperature. It mainly relies on the forced action of the fan coil unit fan to cool or heat the air as it passes through the surface of the heater, thereby enhancing the convective heat transfer between the radiator and the air, and can quickly heat or cool the air in the room.

[0038] like Figure 2As shown, in one embodiment, the forced convection heat exchange terminal 33 is located in the active zone F and / or quiet zone E of the room, and the floor radiant terminal 321 is located in both the active zone F and quiet zone E. The indoor air delivery terminal 31 is located in both the active zone F and quiet zone E. In this embodiment, the active zone F can refer to an indoor space where noise reduction is not critical, such as a living room or kitchen. The quiet zone E can refer to an indoor space where noise reduction is critical, such as a bedroom or study. Typically, the forced convection heat exchange terminal 33 is located in the active zone E due to its relatively high operating noise, while the floor radiant terminal 321 and the indoor air delivery terminal are located in the active zone F and quiet zone E. The water flow channel 212 can selectively connect to both the indoor radiant terminal 32 and the forced convection heat exchange terminal 33. In one embodiment, the water flow channel 212 is connected to both the indoor radiant terminal 32 and the forced convection heat exchange terminal 33. In another embodiment, the water flow channel 212 is connected only to the indoor radiant terminal 32. In yet another embodiment, the water flow channel 212 is connected only to the forced convection heat exchange terminal 33. Because the water flow channel 212 can selectively connect to the indoor radiant terminal 32 and the forced convection heat exchange terminal 33, it can meet the quiet operation requirements of users in different scenarios. In one embodiment, the forced convection heat exchange terminal 33 includes a fan coil unit, and the indoor radiant terminal 32 includes a floor radiant terminal 321. When the indoor air handling system is used for heating or cooling, the water flow channel 212 can be selectively connected to the indoor radiant terminal 32 and the forced convection heat exchange terminal 33 according to the user's requirements for heat exchange efficiency and operating noise.

[0039] In this embodiment, the combination of heat exchange terminals of the indoor air handling system includes: an indoor air delivery terminal 31, an indoor radiant terminal 32, and a forced convection heat exchange terminal 33. In one embodiment, the forced convection heat exchange terminal 33 may be a fan coil unit; the indoor radiant terminal 32 may include a floor radiant terminal 321; and the indoor air delivery terminal 31 may include an air duct.

[0040] The first heat exchanger 21 may include a first refrigerant channel 211 and a water channel 212. Water in the water channel 212 can exchange heat with the refrigerant in the first refrigerant channel 211. The cooled / heated water after heat exchange with the refrigerant in the first refrigerant channel 211 can be supplied to the indoor radiant terminal 32 and the forced convection heat exchange terminal 33. When the indoor radiant terminal 32 is used, it can release cooling or heating energy into the room to regulate indoor temperature and / or humidity. When the forced convection heat exchange terminal 33 is used, it can accelerate heat transfer through forced convection, allowing the indoor temperature to quickly reach the required temperature.

[0041] The second heat exchanger 22 may include a second refrigerant flow channel 221 and an air flow channel 222. The air flow channel 222 may also be connected to the indoor air delivery terminal 31. Air in the air flow channel 222 can exchange heat with the refrigerant in the second refrigerant flow channel 221. The cooled / heated air after heat exchange with the refrigerant in the second refrigerant flow channel 221 can be supplied to the indoor air delivery terminal 31. Specifically, the indoor air handling unit 200 may also include an air inlet, an air outlet 502, and a fan 23. Air flowing in from the air inlet can flow through the air flow channel 222 under the drive of the fan 23 and then flow out from the air outlet 502 to the indoor air delivery terminal 31. The indoor air delivery terminal 31 is used to blow cool or hot air into the room to regulate the indoor temperature.

[0042] Air flowing from the outlet 502 of the indoor air handling unit 200 to the indoor air delivery terminal 31 is directly delivered to the indoor space to cool it down. Water flowing from the outlet 212 of the first heat exchanger 21 is delivered to the water circulation terminal, where it exchanges heat with the indoor air to cool the space. Compared to the indoor air delivery terminal 31, the water circulation terminal involves an additional heat exchange process. Therefore, the cooling efficiency of the indoor air delivery terminal 31 is typically higher than that of the water circulation terminal.

[0043] In this embodiment, by using an outdoor unit 100 (which can be the same outdoor unit 100) to supply refrigerant with cooling or heating capacity to the first heat exchanger 21 and the second heat exchanger 22 of the indoor air handling unit 200, the indoor radiant terminal 32 and / or the forced convection heat exchange terminal 33 connected to the first heat exchanger 21 can release cooling or heating capacity into the room to regulate the indoor temperature, and the indoor air delivery terminal 31 connected to the second heat exchanger 22 can blow cold or hot air into the room to regulate the indoor temperature. During the indoor air handling process, the water circulating in the indoor radiant terminal 32 and the forced convection heat exchange terminal 33 and the air blown by the indoor air delivery terminal 31 share the load.

[0044] In this embodiment, the first refrigerant flow path of the first heat exchanger 21 and the second refrigerant flow path of the second heat exchanger 22 can be arranged in parallel. The refrigerant output from the refrigerant outlet 12 can be selectively distributed to at least one of the first refrigerant flow path 211 and the second refrigerant flow path 221. Specifically, the indoor air handling unit 200 may include a refrigerant flow distribution component 24, which is used to distribute the refrigerant output from the refrigerant outlet 12 between the first refrigerant flow path 211 and the second refrigerant flow path 221, thereby meeting the air handling needs of different scenarios. In addition, since different heat exchange terminals have different performance requirements, by setting the refrigerant flow distribution component 24, the compatibility of the indoor air handling system with heat exchange terminals can also be improved, enabling it to adapt to various types of heat exchange terminals.

[0045] Specifically, the refrigerant flow distribution component 24 can be a flow regulating device disposed on the first refrigerant flow channel 211 and / or the second refrigerant flow channel 221. For example, a first flow regulating device can be disposed on the first refrigerant flow channel 211, and a second flow regulating device can be disposed on the second refrigerant flow channel 221. Specifically, the first and second flow regulating devices can be in the form of electronic expansion valves. Of course, the specific arrangement of the first and second flow regulating devices can also be in other forms, and is not limited to the above description. Those skilled in the art may make other modifications under the guidance of the technical essence of this application, but as long as the functions and effects achieved are the same as or similar to those of this application, they should all be covered within the scope of protection of this application.

[0046] In the above embodiments, the indoor air handling system can meet users' requirements for processing efficiency and operating noise in different scenarios. Users can flexibly switch between high-efficiency mode and silent mode according to different scenarios. In silent mode (such as for use in bedrooms and studies at night), the water flow channel 212 can be connected only to the indoor radiant terminal 32, utilizing its silent operation to achieve near-zero noise cooling / heating, greatly ensuring the quality of sleep and rest. In high-efficiency mode (such as for use in living rooms and kitchens during the day), the water flow channel 212 can be connected to the forced convection heat exchange terminal 33 or simultaneously to both the indoor radiant terminal 32 and the forced convection heat exchange terminal 33, utilizing the efficient heat exchange capacity of the fan coil to quickly reach the set temperature. Although there is some operating noise, it is suitable for active areas where quietness requirements are not high.

[0047] Furthermore, the aforementioned indoor air handling system integrates three types of terminals: an indoor air delivery terminal 31, an indoor radiant terminal 32, and a forced convection heat exchange terminal 33, for indoor air treatment. The indoor radiant terminal 32 provides gentle radiant cooling / heating, ensuring uniform room temperature, eliminating drafts, and providing exceptional comfort, avoiding the discomfort caused by direct airflow from traditional air conditioners. The forced convection heat exchange terminal 33 provides rapid cooling / heating to address urgent cooling or heating needs. The indoor air delivery terminal 31 and airflow channels introduce fresh air and process it (temperature regulation, dehumidification, and purification), ensuring clean and fresh indoor air. By integrating these three types of terminals, comprehensive and precise regulation of indoor temperature, humidity, and air cleanliness is achieved, providing a comfort experience far exceeding that of traditional single air conditioning or underfloor heating systems.

[0048] Furthermore, the refrigerant in the outdoor unit 100 first undergoes efficient heat exchange with water and air in the first heat exchanger 21 and the second heat exchanger 22 of the indoor unit, respectively, ensuring full utilization of the refrigerant energy. The most suitable terminal can be selected according to demand. The forced convection heat exchange terminal 33 has high heat exchange efficiency and is used in applications requiring rapid response, avoiding prolonged high-power operation in pursuit of speed, thus resulting in greater energy savings. While the indoor radiant terminal 32 has lower heat exchange efficiency, it provides a better user experience once the temperature is stabilized. When extremely high efficiency is required, the indoor air handling system allows all terminals to work collaboratively to complete indoor temperature regulation in the shortest possible time.

[0049] Please refer to the following for comprehensive information. Figure 1 , Figure 2 , Figures 3 to 6 In some embodiments of this specification, the indoor air handling unit 200 may include: a separately configured air handling module 4 and an air supply module 5. The air supply module 5 is partially or entirely disposed above the ceiling 6, and the air handling module 4 is wall-mounted below the ceiling 6. The air handling module 4 has a first housing 40, within which a first heat exchanger 21 and a second heat exchanger 22 are disposed. The air supply module 5 has a second housing 50, within which a fan 23 is disposed. The first housing 40 has an air inlet and an air outlet 413, and the second housing 50 has an air inlet 501. The air outlet 413 and the air inlet 501 are connected by an air duct.

[0050] like Figure 4 and Figure 5 As shown, in this embodiment of the application, the first housing 40 has opposing front sidewalls 401 and rear sidewalls 402, opposing top wall 403 and bottom wall 404, and opposing left sidewall 405 and right sidewall 406.

[0051] In this embodiment, the indoor air handling unit 200 may include a separately configured air handling module 4 and an air supply module 5. By separating the air handling module 4 and the air supply module 5, the original indoor air handling unit 200, which was originally a large unit, can be divided into two relatively smaller units. When the air handling module 4 and the air supply module 5 are installed separately, they can be flexibly installed using suitable installation space in a single-level setting, thus facilitating the installation and application of the indoor air handling unit 200 in single-level settings with limited installation space.

[0052] like Figure 3 As shown, for application scenarios with a suspended ceiling 6, the air supply module 5 can be installed on the upper part of the suspended ceiling 6, and the air handling module 4 can be installed on the lower part of the suspended ceiling 6 in a wall-mounted manner. Figure 3 In the diagram, H1 represents the distance from the ground; W1 represents the distance from the wall; X represents the horizontal direction; Y represents the vertical direction; and Z represents the depth. For the air supply module 5, a fan 23 is installed inside its second housing 50. Because the fan 23 is installed, it will generate some noise during operation. By at least partially installing the air supply module 5 above the ceiling 6, the fan 23 can be moved away from the user, and the ceiling 6 can also isolate the noise generated by the fan 23 during operation. This not only enables the installation and application of the indoor air handling unit 200 in a single-level setting but also ensures that the indoor air handling unit 200 achieves optimal quiet operation, guaranteeing a better user experience.

[0053] For single-level apartments, installation space is limited, and there is usually no separate equipment room, making the location for installing the indoor air handling unit 200 very restrictive. Furthermore, in single-level apartment scenarios, users expect efficient use of all interior space and do not want to install a large, independent machine. Therefore, one of the main installation locations for the indoor air handling unit 200 is the balcony 600. Therefore, in this embodiment, the indoor air handling unit 200 is primarily installed on the balcony 600 as an example. Of course, this embodiment does not preclude the possibility of installing the indoor air handling unit 200 in other scenarios.

[0054] When the indoor air handling unit 200 is installed on the balcony 600, the air supply module 5 can be installed above the ceiling 6 of the balcony 600, and the air handling module 4 can be wall-mounted on the side wall of the balcony 600. For aesthetic reasons, the air handling module 4 can be concealed in a cabinet on the balcony 600.

[0055] In this embodiment, the air handling module 4 has a first housing 40, which is mainly used to install core functional components such as heat exchangers. The first housing 40 is provided with an air inlet and an air outlet 413. The air supply module 5 has a second housing 50, which is mainly used to install a fan 23. The second housing 50 is provided with an air outlet 502 and an air inlet 501. The air outlet 413 of the first housing 40 is connected to the air inlet 501 of the second housing 50 via a duct. After the fan 23 is started, air flowing into the first housing 40 through the air inlet can flow into the second housing 50 through its air outlet 413 and the air inlet 501.

[0056] In one embodiment, the first housing 40 has a lateral dimension in the transverse direction and a longitudinal dimension in the longitudinal direction, wherein the lateral dimension is greater than the longitudinal dimension.

[0057] In this embodiment, the first housing 40 can be a hollow box structure. Of course, the first object can also have other regular or irregular structures. In this embodiment, the first housing 40 is mainly illustrated as a cuboid.

[0058] The first housing 40 has a lateral dimension (i.e., length) and a longitudinal dimension (i.e., height), with the lateral dimension being greater than the longitudinal dimension. When the air handling module 4 is horizontally positioned, its lateral dimension extends along the horizontal direction X, and its longitudinal dimension extends along the vertical direction Y. This arrangement facilitates increasing the ground clearance of the air handling module 4, minimizing interference between its height and the user's head. When the air handling module 4 has a higher ground clearance, appliances such as washbasins and washing machines can be installed below it for operation, thus effectively utilizing the space beneath the air handling module 4.

[0059] Please refer to the following: Figure 3 , Figure 5 and Figure 6 In one embodiment, the air handling module 4 is installed against the wall and arranged horizontally. The heat exchanger includes a first heat exchanger 21 and a second heat exchanger 22. The second heat exchanger 22 and the first heat exchanger 21 are arranged horizontally in the first housing 40. The second heat exchanger 22 is used for heat exchange between the refrigerant and the air flowing in from the air inlet. The first heat exchanger 21 is used for heat exchange between the refrigerant and water. The water after heat exchange is used to supply the indoor radiant duct to treat the indoor air.

[0060] In this embodiment, the heat exchanger may include a first heat exchanger 21 and a second heat exchanger 22. The first heat exchanger 21 is used for heat exchange between the refrigerant and water. Specifically, the first heat exchanger 21 can be a finned heat exchanger, or it can be other types of heat exchangers. In this embodiment, a finned heat exchanger is used as an example. The first heat exchanger 21 may also be plate-shaped with a certain thickness. The thickness of the first heat exchanger 21 is typically the minimum dimension relative to its length and width.

[0061] The second heat exchanger 22 is used for heat exchange between the refrigerant and the air flowing in from the air inlet. Specifically, the second heat exchanger 22 can be a plate heat exchanger, or it can be other types of heat exchangers. In this embodiment, a plate heat exchanger is mainly used as an example. The second heat exchanger 22 can be plate-shaped with a certain thickness. Relative to the length and width of the second heat exchanger 22, the thickness is usually the minimum dimension.

[0062] The second heat exchanger 22 and the first heat exchanger 21 are arranged laterally within the first housing 40. Specifically, the thickness directions of both the second heat exchanger 22 and the first heat exchanger 21 are along the lateral dimension of the air handling module 4. This arrangement maximizes the utilization of the lateral dimension of the air handling module 4, allowing the core components to be installed and arranged within the first housing 40 of the air handling module 4. Furthermore, it effectively controls the lateral dimension of the air handling module 4, preventing it from becoming excessively large and improving its adaptability. Specifically, the lateral dimension of the air handling module 4 (i.e., the length of the first housing 40) can be controlled within 900 mm, thus enabling it to adapt to the depth dimensions of all balconies 600.

[0063] In one embodiment, the first refrigerant channel 211 of the first heat exchanger 21 has a first refrigerant inlet and a first refrigerant outlet, the second refrigerant channel 221 of the second heat exchanger 22 has a second refrigerant inlet and a second refrigerant outlet, and the water channel 212 of the first heat exchanger 21 has an inlet and an outlet. The air inlet includes a fresh air inlet 411 and a return air inlet 412. The fresh air inlet 411 and the exhaust air inlet 413 are both located on the top wall 403 of the first housing 40. The first refrigerant channel 211 and the second refrigerant channel 221 are connected to the refrigerant channel of the outdoor unit 100. The first refrigerant channel 211, the second refrigerant channel 221, and the water channel 212 all pass through the top wall 403 of the first housing 40, or the first refrigerant channel 211, the second refrigerant channel 221, and the water channel 212 are all located inside the first housing 40, and the refrigerant channel of the outdoor unit 100 passes through the top wall 403 of the first housing 40. The return air inlet 412 is located on the side wall or bottom wall 404 of the first housing 40.

[0064] In this embodiment, the first heat exchanger 21 may include a plate-shaped body. The first refrigerant flow channel 211 of the first heat exchanger 21 includes a first internal refrigerant flow channel disposed inside the plate-shaped body, a first refrigerant inlet and a first refrigerant outlet disposed on the plate-shaped body, and a first external refrigerant flow channel connected to the first internal refrigerant flow channel through the first refrigerant inlet and the second refrigerant outlet. The first refrigerant inlet may specifically be in the form of a refrigerant connector for connecting a refrigerant pipe, and the first refrigerant outlet may also specifically be in the form of a refrigerant connector for connecting a refrigerant pipe.

[0065] The second heat exchanger 22 may include a heat exchange body for flowing refrigerant, which is generally plate-shaped. The second refrigerant flow channel 221 of the second heat exchanger 22 includes: a second internal refrigerant flow channel disposed inside the heat exchange body, a second refrigerant inlet and a second refrigerant outlet disposed on the heat exchange body, and a second external refrigerant flow channel connected to the second internal refrigerant flow channel through the second refrigerant inlet and the second refrigerant outlet. The second refrigerant inlet may specifically be in the form of a refrigerant connector for connecting a refrigerant pipe, and the second refrigerant outlet may also specifically be in the form of a refrigerant connector for connecting a refrigerant pipe.

[0066] The first and second refrigerant inlets can be connected to the first junction (e.g., a tee connector) via a first external refrigerant pipeline, and then connected to the outdoor unit 100 via the outdoor unit 100's refrigerant pipeline (e.g., a first refrigerant connecting pipe 61 connected to the outdoor unit 100's refrigerant inlet 11 and a second refrigerant connecting pipe 62 connected to the outdoor unit 100's refrigerant outlet 12). Similarly, the second and second refrigerant outlets can be connected to the second junction (e.g., a tee connector) via a second external refrigerant pipeline, and then connected to the outdoor unit 100 via the outdoor unit 100's refrigerant pipeline (first refrigerant connecting pipe 61 and second refrigerant connecting pipe 62).

[0067] The first housing 40 may have a set of openings 610 for the refrigerant piping of the outdoor unit 100 and a set of openings 620 for the water channel 212. In this configuration, the first refrigerant channel 211, the second refrigerant channel 221, and the water channel 212 are all located inside the first housing 40, and the refrigerant channel of the outdoor unit 100 passes through the openings on the top wall 403 of the first housing 40. This arrangement reduces the number of openings and simplifies the connection and arrangement of external refrigerant piping located outside the first housing 40.

[0068] Alternatively, two sets of openings for passing through refrigerant channels can be provided on the top wall 403 of the first housing 40, each set of openings may include two openings. One set of openings is used for passing through the first refrigerant channel 211, and the other set of openings is used for passing through the second refrigerant channel 221. When the first refrigerant channel 211 and the second refrigerant channel 221 pass through the top wall 403 of the first housing 40 and then connect to the refrigerant channel of the outdoor unit 100, it is convenient to connect and maintain the refrigerant pipeline outside the first housing 40.

[0069] In this embodiment, since the upper part of the top wall 403 of the first housing 40 also has the height space of the ceiling 6, when the fresh air inlet 411 and the exhaust air outlet 413 are both located on the top wall 403 of the first housing 40, and the first refrigerant channel 211, the second refrigerant channel 221, and the water channel 212 all pass through the top wall 403 of the first housing 40, or when the first refrigerant channel 211, the second refrigerant channel 221, and the water channel 212 are all located inside the first housing 40 and the refrigerant channel of the outdoor unit 100 passes through the top wall 403 of the first housing 40, the ceiling 6 space can be used for pipe connection, realizing the arrangement of refrigerant pipes, water pipes, and air ducts in the ceiling 6 space. In addition, using the ceiling 6 space for pipe connection is also beneficial for protecting the pipes and ensuring the aesthetics of the installation.

[0070] Considering the extremely limited installation space in a single-level environment, especially with the lateral dimensions and ground clearance already largely utilized, leaving little usable space, if the openings requiring external piping were located on the left / right side walls of the first housing 40, the lateral dimensions might be too large, preventing the first housing 40 from being properly arranged in a single-level environment. If the openings were located on the front / rear side walls of the first housing 40, the front-to-back dimensions of the first housing 40 would increase, creating a feeling of confinement and requiring greater cabinet depth, especially in scenarios with cabinets. If the openings were located on the bottom wall 404 of the first housing 40, the ground clearance of the air handling module 4 would be reduced, potentially interfering with the user's head and affecting the normal operation of the equipment below the air handling module 4. Therefore, the piping arrangement in this embodiment maximizes the optimization of the space arrangement of the first housing 40 below the ceiling 6, maximizing the installation adaptability of the first housing 40.

[0071] In one implementation, such as Figure 2 As shown, the fan 23 may include a fresh air fan 41 and a supply air fan 51. When the fresh air fan 41 is started, it can simultaneously generate negative pressure near the fresh air inlet 411 and the return air inlet 412, thereby drawing both outside and indoor air into the first housing 40. That is to say, as... Figure 5As shown, when the fresh air inlet 411 is located on the top wall 403 and the return air inlet 412 is located on the side wall or bottom wall 404 near the fresh air inlet 411, two types of air can be drawn in using the same fresh air fan 41.

[0072] like Figure 5 and Figure 6 As shown, in one embodiment, the air handling module 4 further includes an air purification unit 43, the air purification unit 43, the first heat exchanger 21, and the second heat exchanger 22 are arranged laterally in the first housing 40; the front sidewall 401 of the first housing 40 is detachable or can be opened to remove the air purification unit 43.

[0073] In this embodiment, the air handling module 4 may also include an air purification unit 43. Depending on the location of the air purification unit 43, its functions and forms may vary slightly.

[0074] For example, the air purification unit 43 may include a first filter element disposed between the air inlet and the second heat exchanger 22. Along the airflow direction, the air purification unit 43 may be located downstream of the air inlet and upstream of the second heat exchanger 22. The air purification unit 43 is used to purify the air flowing into the air inlet. When the air inlet includes a fresh air inlet 411 and a return air inlet 412, the first filter element may include a fresh air filter element disposed downstream of the fresh air inlet 411 and a medium-efficiency filter element disposed downstream of the return air inlet 412. It should be noted that the medium-efficiency filter element may be disposed downstream of the return air inlet 412. For example, when the return air inlet 412 is disposed on the second side wall of the first housing 40, the medium-efficiency filter element may be disposed against the second side wall, either inside or outside the first housing 40. When the medium-efficiency filter element is placed inside the first housing 40, the first housing 40 can be used to protect the medium-efficiency filter element, and at the same time, the maximum lateral size of the whole machine processing module can be reduced.

[0075] Alternatively, the air purification unit 43 may include a second filter element disposed between the second heat exchanger 22 and the air outlet 502. Specifically, along the air flow direction, the air purification unit 43 may be disposed downstream of the second heat exchanger 22 and upstream of the exhaust outlet 413. The air purification unit 43 is used to purify the air after heat exchange in the second heat exchanger 22 before discharging it through the exhaust outlet 413. Specifically, the second filter element may be a high-efficiency filter element. Since the exhaust outlet 413 is disposed on the top wall 403 of the first housing 40, the air flow path within the first housing 40 is generally transverse. In order to uniformly guide the transversely flowing air to the exhaust outlet 413 of the top wall 403, the high-efficiency filter element may be inclined at a certain angle, and its projection toward the exhaust outlet 413 may cover the exhaust outlet 413, so as to ensure that the air flowing out of the exhaust outlet 413 is filtered by the high-efficiency filter element.

[0076] Alternatively, the air purification unit 43 includes a first filter element disposed between the air inlet and the second heat exchanger 22, and a second filter element disposed between the second heat exchanger 22 and the air outlet 502. Specifically, the specific arrangement and form of the first and second filter elements can be referred to the above description, and will not be repeated here. It should be noted that the specific forms of the first and second filter elements described in this application are merely illustrative examples. Those skilled in the art may make other modifications based on the technical essence of this application, but as long as the functions and effects achieved are the same as or similar to those of this application, they should all be covered within the scope of protection of this application.

[0077] like Figure 5 As shown, in one embodiment, the air handling module 4 may further include a first water receiving tray 66, which is located below the first heat exchanger 21 and the second heat exchanger 22, and is used to receive the condensate from the first heat exchanger 21 and the second heat exchanger 22.

[0078] Alternatively, the air handling module 4 may also include a first water receiving tray 66 and a wet film humidifier 65. The first water receiving tray 66 is located below the first heat exchanger 21, the second heat exchanger 22 and the wet film humidifier 65, and is used to receive the condensate from the first heat exchanger 21, the second heat exchanger 22 and the wet film humidifier 65.

[0079] In this embodiment, for components prone to condensation, a first water collection tray 66 is provided, positioned directly below the component to collect the condensate and discharge it centrally. For example, when the component prone to condensation includes a first heat exchanger 21 and a second heat exchanger 22, the first water collection tray 66 is located directly below the first heat exchanger 21 and the second heat exchanger 22; when the component prone to condensation includes a first heat exchanger 21, a second heat exchanger 22, and a wet film humidifier 65, the first water collection tray 66 is located directly below the first heat exchanger 21, the second heat exchanger 22, and the wet film humidifier 65.

[0080] Furthermore, the air handling module 4 may also include a second water receiving tray 67, which is located below the first water receiving tray 66 and the downward projection of the first water receiving tray 66 falls entirely into the second water receiving tray 67. The first water receiving tray 66 has a first drain pipe, and the second water receiving tray 67 has a second drain pipe. The first drain pipe is inserted into the second drain pipe and is spaced apart from the outer wall of the first drain pipe and the inner wall of the second drain pipe.

[0081] In this embodiment, the air handling module 4 may also include a second water receiving tray 67, which is used to receive a small amount of condensate that may be generated by other components and to discharge this condensate in a timely manner to prevent it from accumulating in the first housing 40 and breeding bacteria, etc.

[0082] The second water receiving tray 67 is located directly below the first water receiving tray 66. Specifically, the second water receiving tray 67 can be installed on the bottom wall 404 of the first housing 40. The surface area of ​​the second water receiving tray 67 can be the same as or similar to the surface area of ​​the bottom wall 404.

[0083] The first water receiving tray 66 is provided with a first drain pipe, and the second water receiving tray 67 is provided with a second drain pipe. The upper first drain pipe can be inserted into the lower second drain pipe and is spaced apart from the inner wall of the second drain pipe, leaving a flow gap for draining condensate from the second water receiving tray.

[0084] When the first drain pipe and the second drain pipe are installed inside and outside each other, the pipe layout can be simplified and the number of openings on the first housing 40 can be reduced, making the structure inside the first housing 40 more compact. In addition, since the downward projection of the first water receiving tray 66 falls completely into the second water receiving tray 67, even if the first drain pipe of the first water receiving tray 66 is blocked or other problems occur, and the condensate accumulated in the first water receiving tray 66 overflows, it can flow into the second water receiving tray 67 under the action of gravity, thereby using the second water receiving tray 67 for drainage, ensuring the reliability of drainage.

[0085] In one embodiment, the air handling module 4 further includes a wet film humidifier 65 disposed within the first housing 40. The wet film humidifier 65 is connected to a purified water inflow pipe 63, through which purified water can flow into the wet film humidifier 65. The purified water inflow pipe 63 passes through the top wall 403 of the first housing 40, and a solenoid valve 64 is also disposed on the purified water inflow pipe 63. The solenoid valve 64 is used to control the opening and closing of the purified water inflow pipe 63.

[0086] In one embodiment, the air handling module 4 may further include a heating unit 45.

[0087] Located downstream of the air purification unit 43 (e.g., a high-efficiency filter) along the airflow direction, the heating unit 45 heats the air exiting the air purification unit 43 to reduce humidity. Specifically, the heating unit 45 can be an electric heating element, such as a PTC heating rod. Multiple electric heating elements can be arranged at intervals on the cross-section of the exhaust port 413 to uniformly heat the air.

[0088] In a specific application scenario, such as during the plum rain season when users have a high demand for dehumidification but a low demand for temperature regulation, the heating unit 45 can be activated to dehumidify the air introduced through the air inlet. Of course, in the above scenario, the cooling mode can also be activated, allowing the compressor 1 of the outdoor unit 100 to operate at a lower power. By combining cooling dehumidification with heating dehumidification by the heating unit 45, a highly efficient dehumidification effect can be achieved.

[0089] In this embodiment, the first heat exchanger 21 and the second heat exchanger 22 are arranged laterally in the first housing 40, specifically, both the first heat exchanger 21 and the second heat exchanger 22 are arranged along the lateral dimension of the air handling module 4. Furthermore, the air purification unit 43 can also be arranged laterally within the first housing 40. Taking the air purification unit 43 as a filter element with a predetermined thickness as an example, the thickness direction of the filter element is arranged along the lateral dimension of the air handling module 4. This arrangement maximizes the utilization of the lateral dimension of the air handling module 4, allowing the core components to be installed and arranged within the first housing 40 of the air handling module 4. Furthermore, it allows for effective control of the lateral dimension of the air handling module 4, preventing it from becoming excessively large and improving the adaptability of the air handling module 4 installation. Specifically, the lateral dimension of the air handling module 4 (i.e., the length dimension of the first housing 40) can be controlled to within 900 mm or even smaller, thereby enabling it to adapt to the depth dimensions of all balconies 600.

[0090] Furthermore, the air purification unit 43 is a relatively consumable component and needs to be replaced periodically after a predetermined period of use. When it is inserted into the first housing 40 with its thickness facing the front and rear side walls and its width dimension, the air purification unit 43 can be replaced by plugging and unplugging.

[0091] The front sidewall 401 of the first housing 40 is detachable or openable for removing the air purification unit 43. When the front sidewall 401 of the first housing 40 is detachable or openable, the air purification unit 43 can be easily replaced.

[0092] In one embodiment, the air inlet includes a fresh air inlet 411 and a return air inlet 412. Along the direction of air flow, the air inlet, the second heat exchanger 22, the first heat exchanger 21, and the air purification unit 43 are arranged horizontally in sequence.

[0093] In this embodiment, the air inlet may include a fresh air inlet 411 connected to the outside and a return air inlet 412 connected to the inside. Outside air can flow into the first housing 40 through the fresh air inlet 411, and indoor air can flow into the first housing 40 through the return air inlet 412. After the outside air and indoor air flow into the first housing 40, they need to mix and exchange heat with the second heat exchanger 22. The air after exchanging heat with the second heat exchanger 22 is then purified by the air purification unit 43 and discharged from the first housing 40 through the exhaust port 413. Therefore, the air inlet, the second heat exchanger 22, and the air purification unit 43 are arranged sequentially along the airflow channel 222.

[0094] For the first heat exchanger 21, a temperature sensor for detecting water temperature is usually installed on the water flow channel 212. If the first heat exchanger 21 is located downstream of the second heat exchanger 22, then in cooling mode, if the temperature detected by the temperature sensor is too low when the cold air flowing through the second heat exchanger 22 flows through the first heat exchanger 21, it may trigger the anti-freeze protection mechanism of the first heat exchanger 21, which may cause the corresponding component to malfunction, thereby increasing energy consumption and potentially reducing the lifespan of the component.

[0095] Furthermore, regarding the first heat exchanger 21 and the second heat exchanger 22 within the first housing 40, both are equipped with refrigerant flow channels. For example, during cooling, the air flowing in from the air inlet is at a relatively high temperature, and condensation may occur on the surfaces of the first heat exchanger 21 and the second heat exchanger 22 as it flows through them. The air purification unit 43 itself is a component that is not prone to condensation. When the air inlet, the first heat exchanger 21, the second heat exchanger 22, and the air purification unit 43 are arranged sequentially along the airflow direction, it is equivalent to separating the components prone to condensation from the air purification unit 43. This facilitates centralized treatment of condensation generated by these components. For example, a water collection tray for collecting condensate can be provided at the bottom of the first heat exchanger 21 and the second heat exchanger 22. Furthermore, achieving dry and wet separation helps ensure a longer service life for the air purification unit 43.

[0096] In one embodiment, the second heat exchanger 22 is vertically disposed close to or adjacent to the rear sidewall 402 of the first housing 40.

[0097] In this embodiment, when the first heat exchanger 21 is vertically arranged close to or adjacent to the rear sidewall 402 or front sidewall 401 of the first housing 40, along the transverse direction ( Figure 3 As shown in the horizontal direction X), a space can be left open to facilitate the full mixing of indoor air flowing in from the air inlet (specifically, the external space flowing in from the fresh air inlet 411 and the indoor air flowing in from the return air inlet 412). This not only makes the temperature of the mixed air more uniform, but also makes the flow field of the mixed air more stable. When it passes through the second heat exchanger 22, it can perform heat exchange more fully and improve the heat exchange efficiency.

[0098] Furthermore, when the first heat exchanger 21 is vertically positioned close to or adjacent to the rear sidewall 402 or front sidewall 401 of the first housing 40, it effectively ensures that at least the space in the middle of the second heat exchanger 22 is left unoccupied, and the heat exchange efficiency in the middle of the second heat exchanger 22 is the highest. In this case, the mixed air can flow along the flow channel in the middle of the second heat exchanger 22 to the second heat exchanger 22, achieving sufficient contact and heat exchange with the middle region of the second heat exchanger 22, thereby achieving a high heat exchange efficiency.

[0099] like Figure 5As shown, the air handling module 4 may further include a controller, which may be in the form of an electronic control board or an electronic control box 46. When the first heat exchanger 21 is vertically arranged near the rear side wall 402 of the first housing 40, the controller may be vertically arranged near the front side wall 401 of the first housing 40; when the first heat exchanger 21 is vertically arranged near the front side wall 401 of the first housing 40, the controller may be vertically arranged near the rear side wall 402 of the first housing 40. This ensures that the flow channel in the middle of the second heat exchanger 22 is not obstructed. Furthermore, since the controller is located upstream of the second heat exchanger 22, the airflow can also be used to dissipate heat from the controller.

[0100] like Figure 2 As shown, in some embodiments, the indoor air handling system further includes an air quality detection device 34 for detecting indoor air parameters. The indoor air handling system also includes a damper 310 for adjusting gas flow, which is installed on the indoor air delivery terminal 31. The air inlet includes a fresh air inlet 411 and a return air inlet 412. The fresh air inlet 411 is connected to the outside to introduce outdoor air, and the return air inlet 412 is connected to the inside to introduce indoor air into the indoor air handling unit 200. The fresh air inlet 411 and the return air inlet 412 can be opened simultaneously to mix outdoor air and indoor air in the indoor air handling unit 200.

[0101] Please refer to the following for comprehensive information. Figure 1 , Figure 2 , Figure 3 , Figures 7 to 13 In some embodiments of this specification, the indoor air handling unit 200 may include: an indoor air handling unit 200 including an air handling module 4 and an air supply module 5 connected to each other; the air handling module 4 has a first housing 40, the first housing 40 is provided with an air inlet, and the air supply module 5 is used to allow indoor air to enter the air handling module 4 from the air inlet; the first housing 40 also has an opening 410, and the first housing 40 further includes a first opening and closing structure 420, the first opening and closing structure 420 is disposed at the opening 410 to open and close the opening 410; the air handling module 4 also includes a mating structure for sealing and adapting with the first opening and closing structure 420; when the first opening and closing structure 420 is in the position of closing the opening 410, the first opening and closing structure 420 and the mating structure are sealed and adapted at the connection.

[0102] In this embodiment, the indoor air handling unit 200 is mainly used to process the air to be introduced into the room, adjusting its temperature and / or humidity and / or cleanliness. The indoor air handling unit 200 may include a connected air handling module 4 and an air supply module 5. The air handling module 4 is mainly used to achieve the aforementioned function of adjusting the temperature and / or humidity and / or cleanliness of the air introduced into the room. The air supply module 5 is used to provide driving force for the flow of the air to be introduced into the room. The air handling module 4 and the air supply module 5 can be integrated into a single housing, or, as... Figure 3 As shown, the air handling module 4 and the air supply module 5 can be installed separately. The air supply module 5 can be equipped with a fan, which can be a blower or an exhaust fan, etc.

[0103] The air handling module 4 has a first housing 40, which houses components for treating the air. Specifically, the first housing 40 may contain a heat exchanger and / or a filter element, through which indoor air entering from the air inlet passes. For example, when a heat exchanger is provided in the first housing 40, the temperature of the air flowing through it can be regulated; when a filter element is provided in the first housing 40, the air flowing through it can be filtered, thereby improving air cleanliness. The heat exchanger may include a first heat exchanger 21 and a second heat exchanger 22.

[0104] like Figure 9 and Figure 11 As shown, in order to inspect and replace internal components of the first housing 40, such as heat exchangers and / or filter elements, the first housing 40 has an opening 410, and a first opening and closing structure 420 is provided at the opening 410. When the first opening and closing structure 420 is opened, the opening 410 can be opened, thereby facilitating the operator to inspect and replace the heat exchanger and / or filter element. When the indoor air handling unit 200 is in operation, the first opening and closing structure 420 can close the opening 410. The specific structure and size of the opening 410 can be determined comprehensively based on the structure of the first housing 40, the structure and size of the filter element and other components to be replaced, etc., and this application does not make specific limitations here. For example, when the first housing 40 is a rectangular box structure, the opening 410 can be one side of the first housing 40, or a part of one side.

[0105] In view of the fact that the opening 410 can be used to remove the heat exchanger and / or filter element, in order to facilitate the disassembly and installation of the heat exchanger and / or filter element through the opening 410, the projection of the heat exchanger and / or filter element onto the plane where the opening 410 is located falls into the opening 410.

[0106] To ensure a good seal for the opening 410 when the first opening / closing structure 420 closes it, the air handling module 4 also includes a mating structure, which can be positioned corresponding to the opening 410. For example, the mating structure can be located in the outer periphery near the opening 410, and / or, the mating structure can be located in the area corresponding to the outer periphery near the opening 410 of the first opening / closing structure 420.

[0107] When the first opening / closing structure 420 is in the closed opening 410 position, the first opening / closing structure 420 and the mating structure are sealed and adapted at the connection, ensuring the airtightness of the first housing 40. This allows air outside the first housing 40 to enter the first housing 40 through the air inlet, preventing indoor air from flowing directly into the first housing 40 between the mating structure and the first opening / closing structure 420 without passing through heat exchangers and / or filters or other components that can treat the air, thus affecting the quality of air treatment and the efficiency of air conditioning.

[0108] like Figure 8 and Figure 9 As shown, in one embodiment, the first opening and closing structure 420 includes an openable or detachable structure, and the mating structure includes the edge 460 of the opening 410 and / or the mating plate 450 mounted on the air handling module 4.

[0109] In this embodiment, the first opening and closing structure 420 can be an openable and closable structure, or a detachable structure. Furthermore, the first opening and closing structure 420 can also combine an openable and closable structure with a detachable structure. Of course, the first opening and closing structure 420 can also be any other structure capable of closing and opening the opening 410, and is not limited to the above description. Those skilled in the art, inspired by the technical essence of this application, may make other modifications, but as long as the function and effect achieved are the same as or similar to those of this application, they should all be covered within the scope of protection of this application.

[0110] For example, when the first opening and closing structure 420 is an openable and closable structure, it can be connected to the opening 410 of the first housing 40 by means of a hinge. Specifically, for example, one side of the openable and closable structure and one side edge 460 of the opening 410 of the first housing 40 are connected by a hinge structure, thereby realizing the function of opening and closing the opening 410 of the openable and closable structure.

[0111] Alternatively, the openable structure can be slidably disposed at the opening 410 of the first housing 40. Specifically, for example, the first housing 40 can be provided with slideways above and below the edge 460 at the opening 410. The upper and lower ends of the openable structure are engaged in the slideways, allowing the openable structure to move within the slideways and thus realize the function of opening and closing the opening 410. Of course, the openable structure can also be installed in other ways.

[0112] When the first opening / closing structure 420 is a detachable structure, it can be detachably connected to the opening 410 of the first housing 40. Specifically, the detachable connection can include snap-fit ​​connection, magnetic connection, pin connection, etc. When the first opening / closing structure 420 is a detachable structure, if it is necessary to open the opening 410, the detachable structure can be removed from the opening 410.

[0113] In this embodiment, the mating structure may include the edge 460 of the opening 410 and / or the mating plate 450 mounted on the air handling module 4. The form of the mating structure can be determined based on the installation method of the first opening and closing structure 420 and the distribution of the first opening and closing structure 420.

[0114] For example, when the first opening and closing structure 420 includes an openable and closable door, the mating structure may include the edge 460 of the opening 410. When the first opening and closing structure 420 includes at least two openable and closable door bodies, such as a first door body 430 and a second door body 440, the mating structure may include the edge 460 of the opening 410 and a mating plate 450 corresponding to the contact position of the first door body 430 and the second door body 440.

[0115] In one embodiment, the air handling module 4 may further include a fastening structure for pressing the first opening / closing structure 420 onto the mating structure.

[0116] In this embodiment, the air handling module 4, through a fastening mechanism, can apply pressure to the first opening / closing structure 420, pressing it against the mating structure, thereby reliably ensuring the sealing of the mating position. Furthermore, a sealing element with a certain deformation capability can be provided between the first opening / closing structure 420 and the mating structure. This sealing element can be in the form of sealing cotton, rubber, etc. The sealing element can be provided or formed at the connection point between the first opening / closing structure 420 and the mating structure, or it can be provided or formed at the connection point between the mating structure and the first opening / closing structure 420, or it can be provided or formed at the connection point between the first opening / closing structure 420 and the mating structure. Figure 13As shown, in the embodiment with the mating plate 450, the seal may include a first seal 71 disposed on the edge 460 of the opening 410 of the first housing 40 and on the mating plate 450, and a second seal 72 disposed on the sides of the first door 430 and the second door 440. Taking the second door 440 as an example, when the second door 440 is in the closed state, the first seal 71 and the second seal 72 overlap, achieving the effect of sealing the opening 410 corresponding to the second door 440.

[0117] By setting this fastening mechanism, pressure can be applied to the seal to cause it to deform to a certain extent, thereby further ensuring the sealing performance of the first opening and closing mechanism and the mating structure at the connection. This prevents outdoor air from flowing directly into the first housing 40 through the first opening and closing structure 420 and the mating structure, and from flowing directly into the room without passing through heat exchangers and / or filter elements or other components that can treat the air, thus affecting the quality of air treatment.

[0118] In this embodiment, the fastening structure may include multiple sets, which are distributed at different connection points, thereby applying force to different positions of the first opening and closing structure 420, so that the first opening and closing structure 420 is reliably pressed onto the mating structure, ensuring the sealing of the two at the connection point.

[0119] The fastening structure can be a quick-release structure, facilitating rapid disassembly during user operation and improving operational convenience. Specifically, the quick-release structure can be any one or a combination of the following: a quick-release pin connection structure, a snap-fit ​​structure, a threaded quick-release structure, a magnetic quick-release structure, etc. Of course, the specific form of the quick-release structure is not limited to the above description. Those skilled in the art, inspired by the technical essence of this application, may make other modifications, but as long as their functions and effects are the same as or similar to those of this application, they should all be covered within the scope of protection of this application.

[0120] The fastening structure has an unlocked state and a locked state. In specific use, when it is necessary to repair or replace the components inside the first housing 40, the fastening structure can be switched from the locked state to the unlocked state first, and then the opening 410 can be opened by operating the first opening and closing structure 420. After the repair or replacement is completed, the opening 410 can be closed by operating the first opening and closing structure 420, and then the fastening structure can be switched from the unlocked state to the locked state.

[0121] like Figure 7 and Figure 8 As shown, specifically, the fastening structure may include an upper fastening structure 470 and a lower fastening structure 480. The upper fastening structure 470 is used to press the upper part of the first opening and closing structure 420 onto the upper part of the mating structure, and the lower fastening structure 480 is used to press the lower part of the first opening and closing structure 420 onto the lower part of the mating structure.

[0122] Taking the fastening structure, which includes an upper fastening structure 470 and a lower fastening structure 480, as an example, the upper fastening structure 470 can be located on the first housing 40 at the upper edge 460 of the opening 410 and / or at the upper end of the first opening and closing structure 420. For example, with the upper fastening structure 470 located at the upper edge 460 of the opening 410 of the first housing 40, the upper fastening structure 470 has an unlocked state and a locked state. When the upper fastening structure 470 is in the locked state, a force can be applied to the upper part of the first opening and closing structure 420 to bring it closer to the mating structure, thereby pressing the upper part of the first opening and closing structure 420 against the upper part of the mating structure.

[0123] The lower fastening structure 480 can be located on the first housing 40 at the lower edge 460 of the opening 410 and / or at the lower end of the first opening / closing structure 420. For example, with the lower fastening structure 480 located at the lower edge 460 of the opening 410 of the first housing 40, the lower fastening structure 480 has an unlocked state and a locked state. When the lower fastening mechanism is in the locked state, a force can be applied to the lower part of the first opening / closing structure 420 to bring it closer to the mating structure, thereby pressing the lower part of the first opening / closing structure 420 against the lower part of the mating structure.

[0124] The number of the upper fastening structure 470 can be one or more. When there are multiple upper fastening structures 470, they can be spaced apart along the upper edge 460 of the opening 410, thereby ensuring that the connection between the upper part of the first opening and closing structure 420 and the upper part of the mating structure is subjected to uniform pressing force, thus reliably ensuring the sealing of the connection.

[0125] The number of the lower fastening structure 480 can be one or more. When there are multiple lower fastening structures 480, the multiple lower fastening structures 480 can be spaced apart along the lower edge 460 of the opening 410, thereby ensuring that the connection between the lower part of the first opening and closing structure 420 and the lower part of the mating structure is subjected to uniform pressing force, thereby reliably ensuring the sealing of the connection.

[0126] In one specific embodiment, the quick-release structure is a snap-fit ​​structure, which includes a first snap-fit ​​part and a second snap-fit ​​part. The first snap-fit ​​part is disposed on the air handling module 4, and the second snap-fit ​​part is disposed on the first opening and closing structure 420. The first snap-fit ​​part and the second snap-fit ​​part engage with each other.

[0127] In this embodiment, taking the quick-release structure as a locking structure as an example, the locking structure may include two paired first locking parts and second locking parts. The first locking part may be disposed on the air handling module 4, and the second locking part may be disposed on the first opening / closing structure 420. For example, the air handling module 4 may have a first mating position near the first opening / closing structure 420, and the first locking part may be disposed at this first mating position. Specifically, this first mating position may be the position of the top wall 403 near the first opening / closing structure 420 (door body); the first opening / closing structure 420 has a second mating position opposite to the first mating position, and the second locking part may be disposed at this second mating position. When the first opening / closing structure 420 is closed, the second locking part engages with the first opening / closing part.

[0128] Furthermore, regarding the first housing 40 of the indoor air handling unit 200, when the above-mentioned mating structure is set to seal and adapt to the first opening and closing structure 420, there may be some relatively weak sealing positions.

[0129] Considering that the first housing 40 contains components that require maintenance and replacement, the first opening and closing structure 420 of the first housing 40 typically needs to be opened and closed. There are weak sealing points (e.g., the opening and closing positions) at the connection between the first opening and closing structure 420 and the mating structure, making it difficult to consistently guarantee a reliable seal during use. For example, the mating structure may not be fully compressed at the connection, resulting in a poor seal; or the mating structure may age after a period of use, leading to a poor seal; or impurities may become trapped at the opening and closing position, resulting in a poor seal. When a poor seal occurs at the connection, indoor return air can easily bypass the heat exchanger and / or filter and enter the room, thus affecting the quality of air treatment and failing to ensure that the indoor air efficiently meets the target air quality requirements.

[0130] In one embodiment, at least a portion of the connection is located upstream of the heat exchanger and / or filter element along the direction in which indoor air flows within the first housing 40, or at least a portion of the connection is disposed corresponding to the heat exchanger and / or filter element.

[0131] like Figure 7 As shown, in this embodiment, the first housing 40 has an air inlet, which may include a fresh air inlet 411 for introducing outside air and a return air inlet 412 for introducing indoor air. Furthermore, the first housing 40 is provided with an exhaust outlet 413. Indoor air enters the first housing 40 through the return air inlet 412, flows through a heat exchanger and a filter, and after being processed by the heat exchanger and filter, flows out through the exhaust outlet 413 and subsequently flows into the room.

[0132] If indoor air enters the first housing 40 directly from downstream of the heat exchanger and / or filter, this portion of indoor air, without being treated by the heat exchanger and / or filter, will negatively impact the indoor air quality and hinder the efficient achievement of the target air quality.

[0133] At least some of the connections may include the locations where the seal is relatively weak.

[0134] When the connection point that at least partially achieves the sealing fit between the first opening / closing structure 420 and the mating structure is located at a position corresponding to the heat exchanger and / or filter element or upstream of the heat exchanger and / or filter element, even if some indoor air enters the first housing 40 from this connection point when the seal of this connection point fails, because the connection point is located at the aforementioned position, the air will still flow through the heat exchanger and / or filter element after flowing into the first housing 40. This prevents indoor air from directly entering the first housing 40 from downstream of the heat exchanger and / or filter element (i.e., not flowing through the heat exchanger and / or filter element), ensuring that the air flowing into the room is treated by the heat exchanger and / or filter element, thereby improving indoor air quality and increasing the efficiency of indoor air purification.

[0135] like Figure 8 or Figure 12 As shown, in one embodiment, a filter element is provided inside the first housing 40. The filter element includes a first filter element 414 and a second filter element 415. The first filter element 414 is located at the air inlet. At least part of the connection is located upstream of the second filter element 415, or at least part of the connection is correspondingly provided with the second filter element 415.

[0136] In this embodiment, a filter element for filtering air is disposed within the first housing 40. Multiple filter elements may be included, and the cooperation of multiple filter elements enables multi-stage air treatment. For example, the filter element may include a first filter element 414 and a second filter element 415, wherein the first filter element 414 may be disposed at the air inlet, and the second filter element 415 may be located downstream of the first filter element 414 along the airflow direction.

[0137] When at least part of the connection is located upstream of the second filter element 415 or at least part of the connection is correspondingly provided to the second filter element 415, the connection that can ensure at least part of the sealing cooperation between the first opening and closing structure 420 and the mating structure is provided at a position corresponding to the second filter element 415 or upstream of the second filter element 415.

[0138] Specifically, the connection point where at least part of the sealing cooperation between the first opening / closing structure 420 and the mating structure is achieved includes the relatively weak position of the seal mentioned above.

[0139] When at least part of the connection is located upstream of the second filter element 415 or at least part of the connection is corresponding to the second filter element 415, even if a seal failure occurs at the relatively weak seal location, since the weak seal location is located upstream of or corresponding to the second filter element 415, even if some indoor air enters the first housing 40 through the weak seal location, it will still flow through the second filter element 415, thereby ensuring that the air flowing into the room is filtered by the second filter element 415, which helps to improve indoor air quality and increase the efficiency of indoor air purification.

[0140] like Figure 11 As shown, in one specific embodiment, the first opening and closing structure 420 includes a door body with opposing left side portion 421 and right side portion 422, and opposing upper side portion 423 and lower side portion 424. The door body can rotate relative to the opening 410. When the first opening and closing structure 420 is in the position of closing the opening 410, the left side portion 421, right side portion 422, upper side portion 423, and lower side portion 424 are all sealed and adapted to the mating structure at the connection. The position where the left side portion 421 or right side portion 422 is sealed and adapted to the mating structure is located upstream of the heat exchanger and / or filter element or corresponds to the heat exchanger and / or filter element.

[0141] In this embodiment, the first opening / closing structure 420 may include a door body. For example, the door body may be a rectangular panel. The door body can be positioned facing the user, facilitating opening and closing operations. The door body has opposing left and right sides 421 and 422, as well as opposing upper and lower sides 423 and 424. When the door body is hinged to the opening 410, it can rotate relative to the opening 410.

[0142] When the first opening / closing structure 420 closes the opening 410, its left side 421, right side 422, upper side 423, and lower side 424 all seal and adapt with the mating structure at the connection points, thereby forming a circumferentially sealed mating structure. Taking the edge 460 of the opening 410 as an example, the edge 460 of the opening 410 can correspond to the edge 460 of the door body. When both the edge 460 of the opening 410 and the edge 460 of the door body are sealed and adapted, indoor air can be prevented from entering the opening 410.

[0143] Taking the door body rotating around the left side portion 421 as an example, the right side portion 422 is located upstream of the heat exchanger and / or filter element, or corresponding to the heat exchanger and / or filter element, in a position where it is sealed to the fitting structure. The connection position where the right side portion 422 is sealed to the fitting structure is a relatively weak point in the seal.

[0144] By positioning the right side portion 422 upstream of the heat exchanger and / or filter element or corresponding to the heat exchanger and / or filter element, even if some indoor air enters the first housing 40 from this connection point when the seal fails, it will still flow through the heat exchanger and / or filter element after entering the first housing 40, thus preventing indoor air from directly entering the first housing 40 from downstream of the heat exchanger and / or filter element (i.e., not flowing through the heat exchanger and / or filter element). This ensures that the air flowing into the room is treated by the heat exchanger and / or filter element, thereby improving indoor air quality and increasing the efficiency of indoor air purification.

[0145] When the door rotates around the left side portion 421 as the rotation axis, the position where the right side portion 422 matches the mating structure is a relatively weak sealing position. In addition to improving the position of the weak sealing position, a sealing mechanism can be added at this position to strengthen the seal. For example, a sealing element can be added at the position where the right side portion 422 matches the mating structure; in addition, a fastening structure as described in the above embodiment can be provided at this position.

[0146] Taking the door body rotating around the right side portion 422 as an example, the left side portion 421 is located upstream of the heat exchanger and / or filter element, or corresponding to the heat exchanger and / or filter element, in a position where it is sealed to the fitting structure. The connection position where the left side portion 421 is sealed to the fitting structure is a relatively weak point in the seal.

[0147] By positioning the left side portion 421 upstream of the heat exchanger and / or filter element or corresponding to the heat exchanger and / or filter element, even if some indoor air enters the first housing 40 from this connection point when the seal fails, it will still flow through the heat exchanger and / or filter element after entering the first housing 40, thus preventing indoor air from directly entering the first housing 40 from downstream of the heat exchanger and / or filter element (i.e., not flowing through the heat exchanger and / or filter element). This ensures that the air flowing into the room is treated by the heat exchanger and / or filter element, thereby improving indoor air quality and increasing the efficiency of indoor air purification.

[0148] When the door rotates around the right side portion 422 as the rotation axis, the position where the left side portion 421 matches the mating structure is a relatively weak sealing position. In addition to improving the position of the weak sealing position, a sealing mechanism can be added at this position to strengthen the seal. For example, a sealing element can be added at the position where the left side portion 421 matches the mating structure; in addition, a fastening structure as described in the above embodiment can be provided at this position.

[0149] like Figure 7As shown, in another specific embodiment, the first opening / closing structure 420 includes a first door body 430 and a second door body 440; the first door body 430 has opposing first left side portions 431 and first right side portions 432, opposing first upper side portions 433 and first lower side portions 434, and the first door body 430 can rotate to the left relative to the opening 410. The first left side portions 431, first right side portions 432, first upper side portions 433, and first lower side portions 434 are all sealed and adapted to the mating structure at the connection, wherein at least the position where the first right side portion 432 is sealed and adapted to the mating structure is located at the heat exchanger and The second door 440 has a second left side portion 441 and a second right side portion 442, a second upper side portion 443 and a second lower side portion 444, and is capable of rotating to the right relative to the opening 410. The second left side portion 441, the second right side portion 442, the second upper side portion 443 and the second lower side portion 444 are all sealed and adapted to the mating structure at the connection. At least the position where the second left side portion 441 is sealed and adapted to the mating structure is located upstream of the heat exchanger and / or the filter element or corresponds to the heat exchanger and / or the filter element.

[0150] In this embodiment, the first opening and closing structure 420 may include at least two door bodies. For example, the first opening and closing structure 420 may include a first door body 430 and a second door body 440. Both the first door body 430 and the second door body 440 can be opened and closed. The first door body 430 may be located on the opposite left side, and the second door body 440 may be located on the opposite right side.

[0151] The first door body 430 can be a door panel with an overall rectangular structure. The first door body 430 can be positioned facing the user for easy opening and closing. The first door body 430 has opposing first left side portions 431 and 432, and opposing first upper side portions 433 and 434. The first left side portions 431, 432, 433, and 434 are all sealed and adapted to the mating structure at their joints. The first door body 430 can rotate to the left relative to the opening 410, that is, the first door body 430 rotates around the axis of the first right side portion 432. The connection position where the first right side portion 432 of the first door body 430 seals and adapts to the mating structure is a relatively weak point in the seal.

[0152] By positioning at least the first right side portion 432, which is sealed and adapted to the mating structure, upstream of or corresponding to the heat exchanger and / or filter element, even if some indoor air enters the first housing 40 from this connection location when the seal fails, it will still flow through the heat exchanger and / or filter element after entering the first housing 40, thus preventing indoor air from directly entering the first housing 40 from downstream of the heat exchanger and / or filter element (i.e., not flowing through the heat exchanger and / or filter element). This ensures that the air flowing into the room is treated by the heat exchanger and / or filter element, thereby improving indoor air quality and increasing the efficiency of indoor air purification.

[0153] The second door 440 can be a rectangular door panel. The second door 440 can be positioned facing the user for easy opening and closing. The second door 440 has opposing second left side portions 441 and second right side portions 442, and opposing second upper side portions 443 and second lower side portions 444. The second left side portions 441, second right side portions 442, second upper side portions 443, and second lower side portions 444 are all sealed and adapted to the mating structure at their joints. The second door 440 can rotate to the right relative to the opening 410, that is, the second door 440 rotates about the axis of the second left side portion 441. The first door 430 and the second door 440 can form a double-opening configuration. The connection point where the second left side portion 441 of the second door 440 seals and adapts to the mating structure is a relatively weak point in the seal.

[0154] By positioning at least the second left side portion 441 in a sealing fit with the mating structure upstream of or corresponding to the heat exchanger and / or filter element, even if some indoor air enters the first housing 40 from this connection location when the seal fails, it will still flow through the heat exchanger and / or filter element after entering the first housing 40, thus preventing indoor air from directly entering the first housing 40 from downstream of the heat exchanger and / or filter element (i.e., not flowing through the heat exchanger and / or filter element). This ensures that the air flowing into the room is treated by the heat exchanger and / or filter element, thereby improving indoor air quality and increasing the efficiency of indoor air purification.

[0155] In one embodiment, the mating structure includes a mating plate 450 connected to the heat exchanger or the first housing 40. The first right side portion 432 is located upstream of or corresponding to the heat exchanger and / or filter element in a sealing fit with the mating plate 450. The second left side portion 441 is located upstream of or corresponding to the heat exchanger and / or filter element in a sealing fit with the mating plate 450.

[0156] In this embodiment, the mating structure may include a mating plate 450, which is specifically connected to a heat exchanger. For example, the heat exchanger may have a column or flange facing the first opening / closing structure 420. Taking the heat exchanger as an example where a column is connected, the mating plate 450 can be a panel of the column facing the first opening / closing structure 420. Alternatively, the mating plate 450 may be disposed on the first housing 40. Or, the mating plate 450 may be formed using a panel of a component within the first housing 40, such as a side plate of a filter element facing the first opening / closing structure 420. Of course, the mating plate 450 can also take other forms.

[0157] When the mating structure is a mating plate 450, specifically, the first right side portion 432 is located upstream of the heat exchanger and / or filter element or corresponds to the heat exchanger and / or filter element in a sealing and matching position with the mating plate 450.

[0158] Since the mating position formed by the mating plate 450 and the first right side portion 432 and the second left side portion 441 of the first opening and closing structure 420 is a relatively weak sealing position, by optimizing the design of the above-mentioned relatively weak sealing position, it is possible to ensure that the air flowing into the room is all air that has been treated by the heat exchanger and / or filter element, thereby achieving the purpose of improving indoor air quality and improving the efficiency of indoor air purification.

[0159] In one specific embodiment, the projection of the mating plate 450 toward the first opening and closing structure 420 can simultaneously cover the first right side portion 432 and the second left side portion 441, such that the position where the first right side portion 432 is sealed and adapted to the mating plate 450 and the position where the second left side portion 441 is sealed and adapted to the mating plate 450 both correspond to the mating plate 450.

[0160] Taking the mating plate 450 as an example, which can be formed by a column connected to the heat exchanger, specifically, the mating plate 450 is formed by the column facing the panel of the first opening and closing structure 420, and the column itself can be used for positioning and installing the heat exchanger. In addition, the mating plate 450 can also be a side plate of the filter element facing the first opening and closing structure 420.

[0161] When the mating plate 450 borrows the column structure or the side plate of the filter element, it is beneficial to improve the integration of the air handling module 4 and reduce its size. At the same time, it can form a structure to block air around the heat exchanger or filter element, preventing air from flowing downstream between the heat exchanger and / or filter element and the first housing 40, thus avoiding the heat exchanger and / or filter element and being unable to exchange heat with the heat exchanger and / or be filtered by the filter element.

[0162] In one embodiment, the air inlet includes a fresh air inlet 411 and a return air inlet 412. The first housing 40 has a fresh air duct 490 and a return air duct that are isolated from each other. A fresh air filter 491 is provided in the fresh air duct 490, and an opening for removing the fresh air filter 491 is provided on the wall of the fresh air duct 490. The fresh air duct 490 also has a second opening and closing structure for opening and closing the opening. When the second opening and closing structure is in the closed position, the second opening and closing structure is adapted to seal the wall of the fresh air duct 490.

[0163] In this embodiment, the air inlet may include a fresh air inlet 411 connected to the outside and a return air inlet 412 connected to the inside. Typically, there is a certain difference in temperature and humidity between the outdoor fresh air and the indoor air. When outdoor fresh air is directly introduced into the room, it will affect the indoor temperature and humidity, either lowering or raising them, causing them to deviate from the preset target temperature and humidity. However, in this embodiment, the return air introduced into the room through the return air inlet 412, compared to the case of completely introducing fresh air from the outside, effectively utilizes the cooling or heating capacity of the indoor return air by introducing return air with the same temperature and humidity as the indoor air, reducing the fluctuations in indoor temperature and humidity caused by the total introduced air. This reduces the load on the indoor air handling unit 200 required for temperature and humidity regulation, thus saving energy.

[0164] In one specific embodiment, the detachable structure may include a magnetic adsorption plate 492, which is used to magnetically adsorb onto the wall of the fresh air duct 490 and cover the opening.

[0165] In this embodiment, when the detachable method is a magnetic connection, the detachable structure may include a magnetic adsorption plate 492. The material of the fresh air duct 490 can be a ferromagnetic material, a ferrimagnetic material, etc., for example, an iron alloy. The magnetic adsorption plate 492 may be equipped with a magnet. When the magnetic adsorption plate 492 is positioned at the opening, the attraction generated by the two forces allows the magnetic adsorption plate 492 to reliably cover the opening. When the fresh air filter 491 needs to be replaced, the first opening and closing structure 420 can be opened, and the fresh air duct 490 can be opened by operating the magnetic adsorption plate 492 to remove and install the fresh air filter 491. After subsequent installation, simply reset the magnetic adsorption plate 492 and close the first opening and closing structure 420. The overall operation is simple, convenient, and easy.

[0166] Please refer to the following for comprehensive information. Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 8 , Figures 14 to 18In some embodiments of this specification, the indoor air handling unit 200 may include: an air supply module 5, which supplies air to the indoor space through a duct; the air supply module 5 includes an air supply fan 51 and a second housing 50, the air supply fan 51 being disposed within the second housing 50, the second housing 50 having an air inlet 501 and an air outlet 502, the air outlet 502 being connected to the duct, and the air entering from the air inlet 501 flowing into the indoor space through the air outlet 502 and the duct under the drive of the air supply fan 51; the air supply fan 5... The unit 1 includes a volute 510 and an impeller. The volute 510 has a volute inlet 5101 and a volute outlet 5102. The volute outlet 5102 is set at a predetermined distance from the air outlet 502. A first noise reduction and air guiding device 53 is provided between the volute outlet 5102 and the air outlet 502. Alternatively, the side of the volute 510 of the air supply fan 51 near the air inlet 501 is set at a predetermined distance from the air inlet 501, and a second noise reduction and air guiding device 54 is provided between the side of the volute 510 near the air inlet 501 and the air inlet 501. The indoor air handling unit 200 can reduce noise while ensuring sufficient airflow and air pressure, and achieve ideal quiet operation while ensuring indoor air handling effect, thereby effectively improving the user experience.

[0167] Please refer to the following: Figure 14 , Figure 15 , Figure 16 and Figure 17 In this embodiment, the indoor air handling unit 200 is equipped with an air supply module 5. The air supply module 5 includes a second housing 50 and an air supply fan 51 disposed within the second housing 50. The air inlet 501 on the second housing 50 is used to connect to air that has been regulated in terms of temperature and / or humidity and / or cleanliness and is to be supplied to the room. The air outlet 502 is connected to an air duct and is used to deliver the air to the indoor space. In use, when the air supply fan 51 is started, the air that has been regulated in terms of temperature and / or humidity and / or cleanliness enters the second housing 50 through the air inlet 501, flows through the air supply fan 51, and is delivered to the indoor space through the air outlet 502 and the air duct, thereby regulating the air parameters (temperature and / or humidity and / or cleanliness) of the indoor space.

[0168] During operation, the air supply fan 51 of the air supply module 5 inevitably generates some noise. The fan's performance can be described by the PQ curve, where P represents pressure and Q represents flow quantity. The PQ curve describes the relationship between pressure and flow rate under different operating conditions.

[0169] The PQ curve is a crucial basis for fan selection and system design. It provides a clear understanding of the pressure a fan can provide at different flow rates, and how the flow rate changes under varying pressure requirements. In practical applications, by combining the specific pipeline system resistance characteristics and the required gas flow rate with the fan's PQ curve, an appropriate fan model can be selected to ensure operation within the high-efficiency range, achieving energy savings and stable operation. Furthermore, the PQ curve helps analyze the fan's performance under different operating conditions, predict system operating status, and provides a reference for system commissioning and optimization.

[0170] For the indoor air handling unit 200 of this application, there are predetermined requirements for the airflow and air pressure of the air flowing into the room. The supply fan 51 can be selected according to the indoor airflow and air pressure requirements, as well as the resistance of the duct system. When the supply fan 51 is operated, it needs to overcome the duct resistance to maintain a certain pressure (i.e., static pressure) in the duct during airflow, so as to output air with sufficient air pressure and airflow to the room to meet the needs of indoor air conditioning.

[0171] For the selected air supply fan 51, the corresponding threshold values ​​for pressure and flow rate it can provide are relatively fixed. However, when air flows through the duct, static pressure will inevitably be lost to some extent due to the resistance within the duct. In particular, when the duct bends due to obstacle avoidance (such as beams) or when the duct itself has a small diameter, the duct resistance is large, which will further aggravate the loss of static pressure.

[0172] In order to reduce the noise generated by the air supply fan 51 during operation, while minimizing the negative impact on static pressure and ensuring that the air can reach the predetermined air volume and air pressure when it is delivered to the indoor space through the air duct, in this embodiment of the application, a noise reduction and air diversion device is provided in the second housing 50 of the air supply module 5.

[0173] The blower 51 within the second housing 50 may include a volute 510 and an impeller disposed within the volute 510. The volute 510 has a volute inlet 5101 and a volute outlet 5102. After the impeller starts rotating, air enters the blower 51 through the volute inlet 5101 and flows out through the volute outlet 5102.

[0174] In the second housing 50, at least one of the upstream of the volute inlet 5101 and the downstream of the volute outlet 5102 can be provided with a noise reduction and flow guiding device to guide and reduce the airflow. This can be used to reduce noise and also take into account air volume and air pressure.

[0175] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0176] In this embodiment, the volute outlet 5102 and the air outlet 502 are spaced apart by a predetermined distance. This predetermined distance can be used to install the first noise reduction and airflow guiding device 53. The predetermined distance can be comprehensively determined based on the size, arrangement, and method of the first noise reduction and airflow guiding device 53, and no specific value is limited in this application.

[0177] The first noise reduction and airflow guiding device 53 is used to guide the air flowing out of the volute outlet 5102. Specifically, it can regulate the high-speed airflow at the volute outlet 5102 (due to the circumferential velocity component of the impeller rotation) and guide it in a designated direction, reducing airflow turning losses. The air flowing out of the volute outlet 5102 can flow towards the air outlet 502 along the guiding channel formed by the first noise reduction and airflow guiding device 53 (or the first noise reduction and airflow guiding device 53 in conjunction with the second housing 50). During the process of air flowing through the first noise reduction and airflow guiding device 53, the first noise reduction and airflow guiding device 53 can be used to guide and reduce the noise of the air flowing out of the volute outlet 5102.

[0178] Specifically, the first noise reduction and airflow guiding device 53 is obliquely disposed between the volute outlet 5102 and the air outlet 502 in the left-right direction, and is used to guide the airflow flowing out of the volute outlet 5102 to the air outlet 502. When the airflow flowing out of the volute outlet 5102 flows along the first noise reduction and airflow guiding device 53 to the air outlet 502, the first noise reduction and airflow guiding device 53 can guide the airflow, so that the airflow can flow efficiently and smoothly, avoiding turbulence, eddies and pressure changes during the gas flow process, thereby avoiding the generation of obvious aerodynamic noise, that is, directly and effectively controlling the generation of noise from the source, and thus achieving a better quiet effect.

[0179] Specifically, the inner surface of the first noise reduction and airflow guiding device 53, the volute outlet 5102, the air outlet 502 of the second housing 50, and the second housing 50 form an air channel 531. Along the airflow direction, the flow area of ​​the air channel 531 tends to decrease. When the airflow passes through the gradually narrowing air channel 531, the airflow guiding effect of the first noise reduction and airflow guiding device 53 can gradually increase the airflow volume and air pressure of the airflow flowing out of the volute outlet 5102, so that the airflow can maintain a high static pressure when it flows into the duct downstream of the air outlet 502 of the second housing 50. Even after the pipe resistance loss of the duct, the airflow supplied to the indoor space at the end device can still have sufficient air pressure and airflow, thereby ensuring the effective regulation of indoor air parameters (temperature and / or humidity and / or cleanliness).

[0180] In one embodiment, a cavity is formed between the outer surface of the first noise reduction and diversion device 53 and the second housing 50, and sound-absorbing cotton and / or sound-insulating cotton 532 are disposed in the cavity.

[0181] In this embodiment, the first noise reduction and airflow guiding device 53 may have an inner surface that is in direct contact with the airflow flowing out of the volute outlet 5102, and an outer surface opposite to the inner surface. A cavity is formed between the outer surface and the inner surface of the second housing 50, and at least one of sound-absorbing cotton and sound-insulating cotton may be disposed in the cavity to achieve the effects of sound absorption and sound insulation, thereby achieving the purpose of further noise reduction.

[0182] Taking the installation of sound-absorbing cotton in the cavity as an example, the sound-absorbing cotton can be filled in the cavity. In addition, other sound-absorbing materials, such as foam plastic and fiberboard, can also be installed in the cavity. These sound-absorbing materials can absorb the energy of sound waves, reduce the reflection and scattering of sound waves, and thus reduce the intensity of noise.

[0183] Taking the cavity as an example, the sound insulation cotton can be filled into the cavity. In addition, other sound insulation materials, such as sound insulation felt and sound insulation board, can also be installed in the cavity. These sound insulation materials have high density and sound absorption performance, which can effectively block the propagation of sound waves, surround the noise source, and reduce the transmission of noise.

[0184] In one embodiment, a first noise reduction and air guiding device 53 is provided between the volute outlet 5102 and the air outlet 502. The horizontal dimension of the air outlet 502 is smaller than that of the volute outlet 5102. The center of the air outlet 502 corresponds to or is substantially corresponding to the center of the volute outlet 5102. One end of the first noise reduction and air guiding device 53 is located near or at the volute outlet 5102, and the other end of the first noise reduction and air guiding device 53 is located near or at the air outlet 502.

[0185] In this embodiment, when a first noise reduction and airflow guiding device 53 is provided between the volute outlet 5102 and the air outlet 502, one end of the first noise reduction and airflow guiding device 53 is positioned close to or near the volute outlet 5102, and the other end is positioned close to or near the air outlet 502. The center of the air outlet 502 corresponds to or substantially corresponds to the center of the volute outlet 5102. The lateral dimension of the air outlet 502 is smaller than the lateral dimension of the volute outlet 5102. Figure 16 As shown, the first noise reduction and airflow guiding device 53 cooperates with the second housing 50 to form a straight air passage 531 for airflow, and the flow area of ​​the air passage 531 tends to decrease along the airflow direction. The technical effect of the reduced air passage 531 can be referred to the description above, and will not be repeated here.

[0186] In one embodiment, a first noise reduction and airflow guiding device 53 is provided between the volute outlet 5102 and the air outlet 502, and the first noise reduction and airflow guiding device 53 includes at least one noise reduction and airflow guiding plate 530.

[0187] like Figure 18 As shown, the noise reduction guide plate 530 includes a plate body with a first opening 5302 and a cavity surrounded by the plate body with the first opening 5302, and sound-absorbing cotton and / or sound-insulating cotton 532 is disposed in the cavity. Alternatively, the noise reduction guide plate 530 includes a plate body and sound-absorbing cotton and / or sound-insulating cotton 532 disposed on the inner side of the plate body; the plate body is planar or arc-shaped.

[0188] In this embodiment, when a first noise reduction and flow guiding device 53 is provided between the volute outlet 5102 and the air outlet 502, the first noise reduction and flow guiding device 53 may specifically include at least one noise reduction and flow guiding plate 530. The noise reduction and flow guiding plate 530 may be disposed in the flow path between the volute outlet 5102 and the air outlet 502, so that the airflow flowing out of the volute outlet 5102 can at least partially flow through the noise reduction and flow guiding plate 530 before flowing to the air outlet 502.

[0189] Specifically, the noise reduction guide plate 530 can be a hollow structure with a certain thickness. The noise reduction guide plate 530 can include a plate body with a first opening 5302, which can form a hollow structure, the interior of which forms a cavity. At least one of a sound-absorbing material and a sound-insulating material is disposed within the cavity. The sound-absorbing material can absorb the energy of sound waves, reducing sound wave reflection and scattering, thereby reducing noise intensity. The sound-insulating material can effectively block the propagation of sound waves, surrounding the noise source and reducing noise transmission.

[0190] Furthermore, the noise reduction deflector 530 can also take other forms. For example, the noise reduction deflector 530 may include a plate with a certain thickness, the plate having opposing inner and outer sides, the inner side being the side closer to the airflow exiting the volute outlet 5102, and the inner side may be provided with at least one of sound-absorbing cotton and sound-insulating cotton, thereby achieving a further noise reduction effect.

[0191] The specific structure of the noise reduction guide plate 530 can vary depending on the airflow direction of the volute outlet 5102, the structure of the second housing 50, and the specific location of the air outlet 502. This application does not impose specific limitations on this. For example, the surface of the noise reduction guide plate 530 can be planar or arc-shaped. When the surface of the noise reduction guide plate 530 is planar or arc-shaped, the airflow passing through this structure is less likely to generate significant turbulence, eddies, or cause sudden pressure changes. Of course, in this embodiment, it is not excluded that the plate structure can be other structures that are beneficial for airflow guidance and noise reduction.

[0192] In one embodiment, a first noise reduction and airflow guiding device 53 is provided between the volute outlet 5102 and the air outlet 502. The first noise reduction and airflow guiding device 53 includes at least two noise reduction and airflow guiding plates 530, which are arranged relatively at intervals. The distance between the two noise reduction and airflow guiding plates 530 tends to decrease along the direction of airflow. The two noise reduction and airflow guiding plates 530, the volute outlet 5102, the air outlet 502, and the second housing 50 form an air channel 531, and the flow area of ​​the air channel 531 tends to decrease.

[0193] In this embodiment, when a first noise reduction and airflow guiding device 53 is provided between the volute outlet 5102 and the air outlet 502, the first noise reduction and airflow guiding device 53 may specifically include at least two noise reduction and airflow guiding plates 530. Taking the first noise reduction and airflow guiding device 53 as having two noise reduction and airflow guiding plates 530 as an example, namely a first noise reduction and airflow guiding plate 530 and a second noise reduction and airflow guiding plate 530, the first noise reduction and airflow guiding plate 530 and the second noise reduction and airflow guiding plate 530 are arranged relatively at intervals, and the distance between the two noise reduction and airflow guiding plates 530 tends to decrease along the airflow direction, so that the flow area of ​​the air channel 531 formed by the two noise reduction and airflow guiding plates 530, the volute outlet 5102, the air outlet 502, and the second housing 50 tends to decrease. In other words, through the clever arrangement of the positions of the first noise reduction guide plate 530 and the second noise reduction guide plate 530, a gradually narrowing air channel 531 is formed between the two noise reduction guide plates 530 and the second housing 50, which connects the volute outlet 5102 and the air outlet 502. When the airflow from the volute outlet 5102 flows through the air channel 531, it can not only avoid turbulence, eddies and pressure changes during the gas flow process, thereby avoiding the generation of obvious aerodynamic noise, but also gradually increase the air volume and air pressure of the airflow from the volute outlet 5102. This allows the airflow to maintain a high static pressure when it flows into the duct downstream of the air outlet 502 of the second housing 50. Even after the pipe resistance loss of the duct, the airflow supplied to the indoor space at the end device can still have sufficient air pressure and air volume, thereby ensuring the effective regulation of indoor air parameters (temperature and / or humidity and / or cleanliness).

[0194] Alternatively, it can be understood from another perspective: compared to existing technologies that simply reduce noise and are prone to causing losses in wind pressure and air volume, in this application, by setting the first noise reduction and airflow guiding device 53, not only will it not damage wind pressure and air volume, but it can also improve the fan's ability to generate static pressure in the duct, thereby increasing wind pressure and air volume.

[0195] like Figure 17As shown, in one embodiment, a plurality of arc-shaped air guides 55 are arranged at intervals in the air channel 531. The arc-shaped air guides 55 are located downstream of the volute outlet 5102 and are used to rectify the air flowing out of the volute outlet 5102.

[0196] In this embodiment, the arc-shaped air guide 55 rectifies the air flowing out of the volute outlet 5102, making the rectified airflow more stable. This reduces pressure pulsation and local resistance loss caused by turbulence, thereby improving the static pressure efficiency of the fan. For example, in scenarios requiring high static pressure (such as long duct ventilation), the arc-shaped air guide 55 can convert more energy into effective static pressure, rather than losing it in airflow disturbances.

[0197] When unrectified airflow is ejected at high speed from the volute outlet 5102, it will violently impact downstream channels or components, generating high-frequency "secondary noise". However, by using the arc-shaped air guide 55, the airflow direction is guided in advance, allowing the airflow to enter the downstream channel at a smoother angle, reducing the generation of impact noise.

[0198] Furthermore, the airflow at the volute outlet 5102 typically carries a strong rotational component and turbulent disturbances (such as eddies and uneven velocity distribution) due to the high-speed rotation of the impeller. When an arc-shaped guide vane 55 is installed downstream of the volute outlet 5102, its curved surface design guides the airflow along the arc direction. By changing the airflow direction and dividing the flow field, the turbulent flow is transformed into a more ordered laminar flow, reducing internal frictional losses. Additionally, considering the potential non-uniformity between the center and edge velocities of the airflow at the volute outlet 5102, the arc-shaped guide vanes 55, arranged at intervals, form a flow guide grid. This forces the airflow to redistribute its velocity as it passes through the arc-shaped channel formed by two adjacent arc-shaped guide vanes 55, making the airflow velocity across the channel cross-section more uniform and improving airflow stability.

[0199] In one embodiment, a first noise reduction and air guiding device 53 is provided between the volute outlet 5102 and the air outlet 502. There are two air supply fans 51, two air outlets 502, and two first noise reduction and air guiding devices 53. The two air supply fans 51 are arranged side by side, and the two air supply fans 51, the two first noise reduction and air guiding devices 53, and the two air outlets 502 are respectively provided.

[0200] like Figure 3 As shown, for the suspended ceiling 6 installed on the balcony 600, its height is usually less than 350 mm, making it difficult for existing large fans to be fully installed above the suspended ceiling 6. In a specific scenario where there is a need to install a clothes rack or other equipment below the suspended ceiling 6, the height of the suspended ceiling 6 usually needs to be further reduced, typically controlled within 250 mm. Therefore, it becomes even more difficult for existing large fans to be fully installed above the suspended ceiling 6.

[0201] In this embodiment, the air supply fan 51 can be composed of two smaller fans. Combining two smaller fans with a single larger fan reduces the installation size of the air supply fan 51, making the size of the second housing 50 for mounting the air supply fan 51 as small as possible, thus allowing the air supply fan 51 to be installed completely above the ceiling 6. Furthermore, combining two smaller fans with a single larger fan also reduces the noise generated during operation. Verification shows that when the large fan and the two smaller fans operate at the same speed, the noise generated by the large fan is at least 3 decibels higher.

[0202] For the air supply fan 51, the thickness of its impeller is relatively small compared to its outer perimeter. To minimize the size required by the air supply module 5 in the height direction Y, the rotation axis of the impeller of the air supply fan 51 extends along the longitudinal direction, meaning the air supply fan 51 is horizontally installed. Of course, in this application embodiment, it is not excluded that the rotation axis of the impeller of the air supply fan 51 forms a certain angle with the longitudinal direction. In principle, any implementation that ensures the second housing 50 of the air supply module 5 can be installed above the ceiling 6 can be applied to this application embodiment. Specifically, when the rotation axis of the impeller of the air supply fan 51 extends entirely along the longitudinal direction, the size required by the air supply module 5 in the height direction Y is minimized.

[0203] In specific installation, the two air supply fans 51 are installed horizontally side by side. When there are two air supply fans 51, there are two air outlets 502 on the second housing 50, and two first noise reduction and air guiding devices 53.

[0204] Two air supply fans 51 are respectively connected to two air outlets 502 via corresponding first noise reduction and flow guiding devices 53. One air outlet 502 is connected to the volute outlet 5102 of the first volute 511 via a first noise reduction and flow guiding device 53, and the other air outlet 502 is connected to the volute outlet 5102 of the second volute 512 via a first noise reduction and flow guiding device 53. This ensures that the air flowing out of the volute outlet 5102 can be directly, accurately, independently and efficiently guided to the corresponding air outlet 502 by the corresponding first noise reduction and flow guiding devices 53. This allows the air flowing out of the air supply fans 51 to exit the second housing 50 with a shorter independent path, resulting in smooth airflow and good air volume. This, in turn, helps to ensure that there is sufficient air pressure and air volume in the duct connected to the air outlet 502.

[0205] Specifically, regarding the isolation between the air outlet 502 and the volute outlet 5102 via the first noise reduction and airflow guiding device 53, the air flowing from the volute outlets 5102 of the two air supply fans 51, after being isolated by the first noise reduction and airflow guiding device 53, will not interfere with each other, and the loss of air volume and air pressure is not easily caused. Furthermore, the first noise reduction and airflow guiding device 53 can increase the air volume and air pressure flowing from the volute outlet 5102 to the air outlet 502. In actual use, after the air supply fans 51 are started, the air volume and air pressure of the air flowing from the volute outlets 5102 can be increased; and after the air is noise-reduced, it can independently and efficiently flow through the first noise reduction and airflow guiding device 53 to the air outlet 502 and then enter its respective air duct, and then flow to the corresponding indoor space.

[0206] like Figure 14 and Figure 15 As shown, in one embodiment, a first noise reduction and flow guiding device 53 is provided between the volute outlet 5102 and the air outlet 502. The air supply module 5 also includes a partition 516, which, together with part of the second housing 50, forms a first static pressure box 56. The first noise reduction and flow guiding device 53 is located inside the first static pressure box 56.

[0207] In this embodiment, the air supply module 5 may further include a baffle 516, which may be located downstream of the volute outlet 5102 along the airflow direction. The baffle 516 is disposed within the second housing 50, forming a first static pressure box 56 with a portion of the second housing 50. The air discharged from the volute outlet 5102 first passes through the first static pressure box 56 for noise reduction and airflow guidance before being discharged through the air outlet 502 of the second housing 50, thereby ensuring a better noise reduction effect for the user. Specifically, the flow cross-sectional dimension of the first static pressure box 56 is larger than the flow area of ​​the volute outlet 5102. When airflow flows from the volute outlet 5102 (with a smaller flow area) into the first static pressure box 56 (with a larger flow cross-sectional dimension), the first static pressure box 56 can reduce the aerodynamic noise of the airflow from the volute outlet 5102, making the airflow smoother and thus achieving noise reduction.

[0208] In the case where a first noise reduction and flow guiding device 53 is provided between the volute outlet 5102 and the air outlet 502, the first noise reduction and flow guiding device 53 can be set inside the first static pressure box 56. Based on the noise reduction achieved in the first static pressure box 56, the air flowing out of the vortex is further guided and the noise is reduced, thereby further improving the noise reduction effect. At the same time, it can also increase the air pressure and air volume.

[0209] The volute outlet 5102 is fixed to the partition plate 516. This fixing method can be bolted, snap-fitted, or other feasible fixing methods. The partition plate 516 is provided with a through hole for air passage. This through hole can be a through hole opened in the partition plate 516 to match the volute outlet 5102. The outer contour of the partition plate 516 can be fitted or sealed to the inner surface of the second housing 50 to ensure that the air flowing out of the volute outlet 5102 can flow completely towards the air outlet 502.

[0210] like Figure 14 and Figure 15 As shown, furthermore, a shock-absorbing structure and / or a sealing structure are provided between the periphery of the partition 516 and the inner surface of the second housing 50. When a shock-absorbing structure is provided between the periphery of the partition 516 and the inner surface of the second housing 50, the shock-absorbing structure can effectively reduce the mechanical noise generated when the blower 51 is working. Specifically, the shock-absorbing structure can be in the form of a shock-absorbing pad. Of course, the specific form and material of the shock-absorbing structure are not specifically limited in this application. When a sealing structure is also provided between the periphery of the partition 516 and the inner surface of the second housing 50, the sealing structure can improve the sealing performance of the first static pressure box 56, effectively reduce the decibels of noise generated inside the first static pressure box 56 transmitted to the outside, and isolate the noise generated when the blower 51 is working from the first static pressure box 56, ensuring the stability of the first static pressure box 56 during operation. The sealing structure can specifically be in the form of sealant or a sealing element. Of course, the specific form of the sealing structure can also be other forms, which are not specifically limited in this application.

[0211] Furthermore, a vibration damping structure and / or a sealing structure are provided between the partition 516 and the volute outlet 5102. Specifically, the volute outlet 5102 and the partition 516 can be directly fixed together while a vibration damping structure and / or a sealing structure are provided. The specific form and function of the vibration damping structure and the sealing structure can be referred to the description of the above-described embodiments. Taking the vibration damping structure as an example, it can effectively reduce the transmission of vibration generated at the volute outlet 5102 due to the operation of the blower 51 to the partition 516, thereby enabling the first static pressure box 56 to remain in a stable state and facilitating better noise reduction.

[0212] In one embodiment, a mounting member is provided on the volute 510, which is directly or indirectly connected to the second housing 50. A shock-absorbing member is provided on the inner surface of the second housing 50, and the shock-absorbing member is located between the mounting member and the inner surface of the second housing 50.

[0213] In this embodiment, the volute 510 can be connected to the second housing 50, wherein the connection between the volute 510 and the second housing 50 can be achieved through the cooperation of a mounting member. Specifically, the form of the mounting member and the connection relationship between the mounting member and the volute 510 and the second housing 50 are not limited herein.

[0214] In this embodiment, a shock absorber is provided on the inner surface of the second housing 50. By providing a shock absorber between the mounting component and the inner surface of the second housing 50, mechanical noise generated when the blower 51 is working can be prevented from propagating outward through the second housing 50.

[0215] In some embodiments, the volute 510 of the blower 51 is positioned at a predetermined distance from the air inlet 501 on the side near the air inlet 501, and a second noise reduction and flow guiding device 54 is provided between the side of the volute 510 near the air inlet 501 and the air inlet 501. The second noise reduction and flow guiding device 54 can be used to streamline the turbulent airflow flowing in from the air inlet 501, allowing it to enter the volute 510 at a uniform flow rate and angle, thus avoiding additional turbulence caused by the airflow impacting the inner wall of the volute 510.

[0216] In the case where a second noise reduction and flow guiding device 54 is provided between the side of the volute 510 of the blower 51 near the air inlet 501 and the air inlet 501, the rotation shaft of the impeller extends in the longitudinal direction, and the second noise reduction and flow guiding device 54 is obliquely arranged in the longitudinal direction between the air inlet 501 and the volute inlet 5101 to guide the air flowing in from the air inlet 501 to the volute inlet 5101.

[0217] In this embodiment, to achieve better noise reduction, the air supply module 5, which has a second housing 50, can be installed completely above the ceiling 6. To install the air supply module 5 on the ceiling 6, which has a limited height, the air supply fan 51 is installed horizontally.

[0218] Specifically, for the air supply fan 51, the thickness of its impeller is relatively small compared to its outer perimeter. To minimize the size required by the air supply module 5 in the height direction Y, the rotation axis of the impeller of the air supply fan 51 extends along the longitudinal direction. Of course, in this embodiment, it is not excluded that the rotation axis of the impeller of the air supply fan 51 forms a certain angle with the longitudinal direction. In principle, any embodiment that ensures the second housing 50 of the air supply module 5 can be installed above the ceiling 6 can be applied to this embodiment. When the rotation axis of the impeller of the air supply fan 51 extends entirely along the longitudinal direction, the size required by the air supply module 5 in the height direction Y is minimized.

[0219] The number of volute inlets 5101 of the blower 51 can be one. The volute inlet 5101 can be located on the upper surface of the volute 510, that is, the volute inlet 5101 is set upward; or, the volute inlet 5101 can be located on the lower surface of the volute 510, that is, the volute inlet 5101 is set downward.

[0220] Taking the rectangular box-like structure of the second housing 50 as an example, it has opposing upper and lower panels, opposing left and right side panels, and opposing front and rear side panels. The volute inlet 5101 can be directly opposite the upper or lower panel of the second housing 50.

[0221] The air inlet 501 of the second housing 50 is located on the side plate of the second housing 50, for example, a left side plate. There is a certain height difference and angle difference between the air inlet 501 and the volute inlet 5101 in spatial position. In order to efficiently, accurately and directly guide the air flowing in from the air inlet 501 to the volute inlet 5101, a second noise reduction and flow guiding device 54 can be provided between the air inlet 501 and the volute inlet 5101. The second noise reduction and flow guiding device 54 is obliquely arranged in the longitudinal direction between the air inlet 501 and the volute inlet 5101 to guide the air flowing in from the air inlet 501 to the volute inlet 5101.

[0222] For example, when the volute inlet 5101 is set downwards, the second noise reduction and airflow guiding device 54 is obliquely arranged from top to bottom between the air inlet 501 and the volute inlet 5101. Alternatively, when the volute inlet 5101 is set upwards, the second noise reduction and airflow guiding device 54 is obliquely arranged from bottom to top between the air inlet 501 and the volute inlet 5101.

[0223] In this embodiment, by setting the second noise reduction and flow guiding device 54, the airflow direction can be accurately guided, and the noise caused by turbulence, eddies and pressure changes during the airflow process can be effectively reduced. In addition, when the second noise reduction and flow guiding device 54 is obliquely set between the air inlet 501 and the volute inlet 5101, a dedicated inlet channel can be formed between the second noise reduction and flow guiding device 54 and the second housing 50. The flow cross section of the inlet channel gradually decreases, which is beneficial to increasing the air volume and air pressure of the fluid.

[0224] In one embodiment, the second noise reduction and flow guiding device 54 includes at least one noise reduction and flow guiding plate 530. The noise reduction and flow guiding plate 530 includes a plate body with openings and a cavity surrounded by the plate body with openings. The cavity is provided with sound-absorbing cotton and / or sound-insulating cotton 532. Alternatively, the noise reduction and flow guiding plate 530 includes a plate body and sound-absorbing cotton and / or sound-insulating cotton 532 disposed on the windward side of the plate body. The plate body is planar or arc-shaped.

[0225] In this embodiment, the second noise reduction and flow guiding device 54 may include at least one noise reduction and flow guiding plate 530, and the specific form of the noise reduction and flow guiding plate 530 may be the same as or similar to the form of the noise reduction and flow guiding plate 530 in the first noise reduction and flow guiding device 53.

[0226] The noise reduction guide plate 530 can be a hollow structure with a certain thickness. The noise reduction guide plate 530 can include a plate with openings, which can form a hollow structure, with a cavity inside. At least one of a sound-absorbing material and a sound-insulating material is disposed within the cavity. The sound-absorbing material can absorb the energy of sound waves, reducing sound wave reflection and scattering, thereby reducing noise intensity. The sound-insulating material can effectively block the propagation of sound waves, surrounding the noise source and reducing noise transmission.

[0227] Furthermore, the noise reduction deflector 530 can also take other forms. For example, the noise reduction deflector 530 may include a plate with a certain thickness, the plate having opposing inner and outer sides, the inner side being the side closer to the airflow exiting the volute outlet 5102, and the inner side may be provided with at least one of sound-absorbing cotton and sound-insulating cotton, thereby achieving a further noise reduction effect.

[0228] The specific structure of the noise reduction guide plate 530 can vary depending on the airflow direction at the inlet of the volute 510, the structure of the second housing 50, and the specific location of the air inlet 501. This application does not impose specific limitations on this. For example, the surface of the noise reduction guide plate 530 can be planar or arc-shaped. When the surface of the noise reduction guide plate 530 is planar or arc-shaped, the airflow passing through this structure is less likely to generate significant turbulence, eddies, or cause sudden pressure changes. Of course, in this embodiment, it is not excluded that the plate structure can be other structures that are beneficial for airflow guidance and noise reduction.

[0229] like Figure 14 As shown, in one embodiment, an aluminum foil 9 is further provided on the inner surface of the second housing 50. Sound-absorbing cotton and / or sound-insulating cotton are provided between the inner surface of the second housing 50 and the aluminum foil 9.

[0230] In this embodiment, aluminum foil 9 can be provided on the inner surface of the second housing 50. The aluminum foil 9 can form a heat insulation cavity inside the second housing 50. When the air after heat exchange flows into the second housing 50, the temperature of the air can be maintained as much as possible, so as not to cause a large temperature rise or fall. This is beneficial to ensure the temperature of the air that is subsequently delivered to the indoor space through the air duct.

[0231] In one feasible implementation, such as Figure 15As shown, an air outlet plate 58 can be provided on one side of the second housing 50, which is directly opposite the volute outlet 5102. The air outlet plate 58 can be located on the outer side of the second housing 50. Alternatively, it can be located on the inner side of the second housing 50. The air outlet plate 58 can integrate the aforementioned aluminum foil 9 and sound-absorbing cotton and / or sound-insulating cotton 532. For example, the air outlet plate 58 can include a stacked plate (e.g., a metal plate), sound-absorbing cotton and / or sound-insulating cotton 532, and aluminum foil 9. By providing an air outlet plate 58 with structures such as aluminum foil 9, sound-absorbing cotton, and / or sound-insulating cotton 532 at the air outlet 502 of the second housing 50, the noise reduction and heat insulation effects achievable by the aforementioned structures of aluminum foil 9, sound-absorbing cotton, and / or sound-insulating cotton 532 can be achieved, further reducing the noise transmitted outward from the air outlet 502 of the second housing 50.

[0232] In addition, an air inlet plate 57 can be provided at the air inlet 501 of the second housing 50. The air inlet plate 57 may also include stacked plates (e.g., metal plates), sound-absorbing cotton and / or sound-insulating cotton 532, and aluminum foil 9. Alternatively, the upper cover plate 591 and the side frame 592 of the second housing 50 can also be provided with the above-described stacked structure. The technical effects achieved by the above structure can be referred to the description of the above embodiments, and will not be repeated here.

[0233] like Figure 15 As shown, in one specific embodiment, a cavity is formed between the leeward side of the second noise reduction and flow guiding device 54 and the second housing 50, and sound-absorbing cotton and / or sound-insulating cotton 532 are provided in the cavity.

[0234] In this embodiment, the second noise reduction and airflow guiding device 54 may have a windward surface that directly contacts the airflow flowing in through the air inlet 501, and a leeward surface opposite to the windward surface. A cavity is formed between the leeward surface on the leeward side and the inner surface of the second housing 50. At least one of sound-absorbing cotton and sound-insulating cotton may be disposed in the cavity to achieve sound absorption and sound insulation effects, thereby achieving further noise reduction.

[0235] Taking the installation of sound-absorbing cotton in the cavity as an example, the sound-absorbing cotton can be filled in the cavity. In addition, other sound-absorbing materials, such as foam plastic and fiberboard, can also be installed in the cavity. These sound-absorbing materials can absorb the energy of sound waves, reduce the reflection and scattering of sound waves, and thus reduce the intensity of noise.

[0236] In some embodiments of this specification, the indoor air handling unit includes an air handling module and an air supply module connected in communication. The air handling module has a first housing. A first heat exchanger and a second heat exchanger are disposed within the first housing. The air supply module has a second housing. A fan is disposed within the second housing. An air inlet and an air outlet are provided on the first housing. An air inlet and an air outlet are provided on the second housing. The indoor air handling system also includes a noise-reducing duct. The air outlet and the air inlet are connected through the noise-reducing duct. The air outlet is connected to the noise-reducing duct to supply air to it. The noise-reducing duct includes an inner sound-absorbing duct and an outer sound-insulating duct. The outer sound-insulating duct is located outside the inner sound-absorbing duct. The inner sound-absorbing duct includes a first pipe and a second pipe. The first pipe is located inside the second pipe. A first noise-reducing cotton is disposed between the first pipe and the second pipe. The outer sound-insulating duct includes a third pipe and a fourth pipe. The third pipe is located inside the fourth pipe. A second noise-reducing cotton is disposed between the third pipe and the fourth pipe. The first tube and / or the third tube are provided with openings. Alternatively, the thickness of the second noise-reducing cotton is less than or equal to the thickness of the first noise-reducing cotton.

[0237] Please refer to the following for comprehensive information. Figures 19 to 21 The embodiments of this application provide a noise-reducing duct 8, which may include: an inner sound-absorbing duct 81 and an outer sound-insulating duct 82, with the outer sound-insulating duct 82 located outside the inner sound-absorbing duct 81; the inner sound-absorbing duct 81 includes a first pipe 811 and a second pipe 812, with the first pipe 811 located inside the second pipe 812, and a first noise-reducing cotton 813 disposed between the first pipe 811 and the second pipe 812; the outer sound-insulating duct 82 includes a third pipe 821 and a fourth pipe 822, with the third pipe 821 located inside the fourth pipe 822, and a second noise-reducing cotton 823 disposed between the third pipe 821 and the fourth pipe 822.

[0238] In this embodiment, the noise reduction duct 8 can be applied at the upstream and downstream positions of the fan unit 5 in the air handling system to reduce the noise generated when the fan unit 5 is working, and in particular, to prevent the noise from propagating outward along the radial direction of the noise reduction duct 8.

[0239] Specifically, the noise-reducing duct 8 may include an inner sound-absorbing duct 81 and an outer sound-insulating duct 82, which are fitted together. The outer sound-insulating duct 82 is fitted over the inner sound-absorbing duct 81. Specifically, the inner sound-absorbing duct 81 itself can be a multi-layered composite structure, thus possessing a certain noise reduction capability, reducing the noise generated by the fan unit 5 by a certain decibel. However, the inventors of this application have discovered that if the inner sound-absorbing duct 81 structure is used solely as the noise-reducing duct 8, noise easily propagates radially outward along the noise-reducing duct 8. This radially propagated noise may be directly transmitted to the user's space through the air, resulting in a poor user experience.

[0240] In this embodiment, by setting an outer soundproof duct 82 on the outside of the inner soundproof duct 81, the outer soundproof duct 82 can work in conjunction with the inner soundproof duct 81 to achieve an ideal noise reduction effect. In particular, noise that propagates outward along the circumference of the noise reduction duct 8 can be effectively blocked, thereby ensuring that users have a better user experience.

[0241] In addition, by optimizing the structure of the outer sound insulation duct 82, the thickness of the second noise reduction cotton 823 is less than or equal to the thickness of the first noise reduction cotton 813, which enables the noise reduction duct 8 to maintain better flexibility and bend easily, thereby adapting to different installation environments and effectively controlling costs.

[0242] In this embodiment, the inner sound-absorbing duct 81 may include a first duct 811, a second duct 812, and a first noise-reducing cotton 813 located between the first duct 811 and the second duct 812. The first duct 811 is provided with a second opening 83 to facilitate noise entering the first noise-reducing cotton 813 through the second opening 83. The first noise-reducing cotton 813 may include at least one of sound-absorbing cotton and sound-insulating cotton. For example, the first noise-reducing cotton 813 may be polyester fiber cotton with a predetermined thickness.

[0243] When the first noise-reducing cotton 813 is made of polyester fiber, its porous structure and sound-absorbing properties achieve an ideal noise reduction effect. Specifically, the polyester fiber has a three-dimensional mesh-like porous structure, with numerous tiny pores that effectively capture and absorb sound wave vibrations in the air. When sound waves enter the pores, they are reflected, rubbed, and converted between the fibers, transforming sound energy into heat energy, thus reducing echoes, noise, and resonance, resulting in a significant noise absorption effect. Furthermore, this polyester fiber cotton has stable physical properties, high durability, long service life, low maintenance costs, and is environmentally friendly and healthy.

[0244] Of course, in this embodiment, the specific form of the first noise-reducing cotton 813 is not limited to the examples above. Those skilled in the art may make other changes under the guidance of the technical essence of this application, but as long as the function and effect achieved are the same as or similar to this application, they should be covered within the scope of protection of this application.

[0245] In one embodiment, the thickness of the first noise-reducing cotton 813 is greater than 15 mm and not greater than 30 mm. To ensure the sound absorption effect of the first noise-reducing cotton 813, its thickness needs to be greater than 15 mm. When the thickness of the first noise-reducing cotton 813 is greater than 15 mm, sufficient material thickness allows sound waves to penetrate and undergo friction and transformation within the internal pores, thereby achieving effective noise absorption. If the thickness of the first noise-reducing cotton 813 is less than 15 mm, sound waves may not be effectively absorbed by the first noise-reducing cotton 813, resulting in an unreliable noise reduction effect.

[0246] When the thickness of the first noise-reducing cotton 813 exceeds 30mm, the improvement in its sound absorption coefficient gradually slows down, but material costs, weight, and installation space requirements increase significantly. In summary, when the thickness of the first noise-reducing cotton 813 is between 15mm and 30mm, it meets the noise reduction requirements without causing performance redundancy, effectively controls material costs, saves installation space, and ensures that the noise-reducing duct 8 has sufficient flexibility, is easy to bend, and is easy to install and adapt to different environments. Specifically, when the thickness of the first noise-reducing cotton 813 is 25mm, it achieves the optimal balance between sound absorption performance and space control.

[0247] In this embodiment, the outer soundproof duct 82 may include a third duct 821, a fourth duct 822, and a second noise-reducing cotton 823 located between the third duct 821 and the fourth duct 822. The third duct 821 may be provided with a second opening 83 to allow noise to enter the second noise-reducing cotton 823 through the second opening 83. The third duct 821 may be the same duct as the second duct 812, or the third duct 821 may be sleeved on the outer surface of the second duct 812.

[0248] The second noise-reducing cotton 823 may include at least one of sound-absorbing cotton and sound-insulating cotton. For example, the second noise-reducing cotton 823 may be polyester fiber cotton with a predetermined thickness. When the first noise-reducing cotton 813 is polyester fiber cotton, it also has the advantages of polyester fiber cotton mentioned above, which will not be elaborated further in this application.

[0249] Of course, in this embodiment, the specific form of the second noise-reducing cotton 823 is not limited to the examples above. Those skilled in the art may make other changes under the guidance of the technical essence of this application, but as long as the function and effect achieved are the same as or similar to this application, they should be covered within the scope of protection of this application.

[0250] In this embodiment, the thickness of the second noise-reducing cotton 823 is less than the thickness of the first noise-reducing cotton 813. Since the main function of the outer sound-insulating duct 82 is to reduce noise that may radially emanate from the inner sound-insulating duct 81, an outer sound-insulating duct 82 with the second noise-reducing cotton 823 can be provided outside the inner sound-insulating duct 81 to reduce the radiated noise that may radially emanate from the inner sound-insulating duct 81. The thickness of the second noise-reducing cotton 823 can be less than that of the first noise-reducing cotton 813. This not only satisfies the requirement for reducing the radiated noise that may radially emanate from the inner sound-insulating duct 81, but also prevents the overall thickness of the noise-reducing duct 8 from becoming too thick, which would affect its flexibility. This ensures that the noise-reducing duct 8 is easy to bend and install, while effectively controlling costs.

[0251] In one embodiment, the thickness of the second noise-reducing cotton 823 is not less than 5 mm and not more than 20 mm.

[0252] In this embodiment, the second noise-reducing cotton 823 needs to have a certain thickness to ensure that the pore structure can intercept sound waves. If the thickness of the second noise-reducing cotton 823 is less than 5mm, the material is too thin, the pore depth is insufficient, sound waves can easily penetrate directly, and the sound absorption efficiency cannot meet the requirements.

[0253] If the thickness of the second noise-reducing cotton 823 is greater than 20mm, the overall noise-reducing structure of the noise-reducing duct 8 will be too thick (e.g., the total thickness of the first noise-reducing cotton 813 + the second noise-reducing cotton 823 may exceed 50mm), occupying too much space (especially when the noise-reducing duct 8 is installed in a ceiling with limited height; if the size of the noise-reducing duct 8 is too large, it may interfere with the ceiling), and the improvement in noise reduction effect will be limited. When the thickness of the second noise-reducing cotton 823 is 15mm, the optimal balance between noise reduction performance and space control can be achieved.

[0254] In one specific embodiment, the thickness of the first noise-reducing cotton 813 is 25mm; the thickness of the second noise-reducing cotton 823 is 15mm; the first tube 811 and the third tube 821 are aluminum foil tubes, and the second tube 812 and the fourth tube 822 are PVC tubes; both the first tube 811 and the third tube 821 are provided with second openings 83, with an opening ratio of not less than 8 openings / cm. 3 .

[0255] In this embodiment, the first pipe 811 of the inner sound-absorbing duct 81 may include an aluminum foil pipe, and the second pipe 812 may include a PVC pipe. The first pipe 811 may have a second opening 83.

[0256] PVC pipes possess certain sound insulation properties, absorbing some sound wave energy through their inherent damping characteristics and reducing sound propagation through the pipe walls. Simultaneously, the airtightness of PVC pipes prevents vibrations generated by gas flow from being directly transmitted to the outside. The intermediate first noise-reducing cotton 813 suppresses high-frequency vibrations caused by internal fluid flow (such as gas impact and turbulence), thereby reducing vibration noise. The interface between the PVC pipe and the first noise-reducing cotton 813 experiences sound wave reflection due to the difference in acoustic impedance between the materials; some sound waves attenuate after multiple reflections between the two layers, further reducing noise propagation efficiency.

[0257] When the second pipe 812 of the inner sound-absorbing duct 81 is made of PVC pipe, it is also corrosion-resistant, suitable for complex environments, and extends the service life of the pipeline.

[0258] Furthermore, a support layer can be provided inside the inner layer of the sound-absorbing duct 81, for example, steel wire can be used as the support layer. Specifically, the steel wire can be copper-plated steel wire with a diameter of about 1mm. When copper-plated steel wire with a diameter of about 1mm is used to form a rigid skeleton 84, it prevents the pipeline from collapsing or deforming due to internal pressure or external load, and avoids abnormal vibration noise caused by structural deformation. In addition, the high strength of the steel wire can limit the local vibration amplitude of the pipeline wall, especially having a significant inhibitory effect on low and medium frequency vibrations (such as vibrations caused by fluid pulsation).

[0259] In addition, the first tube 811 of the inner silencing duct 81 can be an aluminum foil tube.

[0260] Specifically, an aluminum foil layer can be provided inside the support layer formed by the steel wire to form the aforementioned aluminum foil tube. The surface of the first tube 811 (aluminum foil tube) can be uniformly provided with second openings 83, i.e., sound-absorbing holes. When the sound-absorbing holes are uniformly distributed on the surface of the aluminum foil layer, a micro-resonance cavity can be formed. When sound waves are incident, the air column at the neck of the opening and the air inside the cavity form a resonance system, resonating and absorbing sound waves of specific frequencies, effectively reducing noise. Specifically, the thickness of the aluminum foil layer can be 0.07 mm or more, and the distribution of the second openings 83 on the aluminum foil layer is at least 8 per cubic centimeter. The aluminum foil itself, with a thickness ≥0.07 mm, has a certain sound insulation performance and can block high-frequency sound waves; at the same time, the metallic damping characteristics of the aluminum foil can consume some vibration energy, reducing the generation of secondary noise.

[0261] In addition, the smooth inner surface of the aluminum foil tube can optimize the fluid flow field inside the pipeline and reduce aerodynamic noise caused by turbulence or eddies.

[0262] The specific structure of the outer soundproof duct 82 can be similar to that of the inner soundproof duct 81.

[0263] The third pipe 821 of the outer soundproof duct 82 may include an aluminum foil pipe, and the fourth pipe 822 may include a PVC pipe. The third pipe 821 may have a second opening 83.

[0264] PVC pipes possess certain sound insulation properties, absorbing some sound wave energy through their inherent damping characteristics and reducing sound propagation through the pipe walls. Simultaneously, the airtightness of PVC pipes prevents vibrations generated by gas flow from being directly transmitted to the outside. The intermediate second noise-reducing cotton 823 suppresses high-frequency vibrations caused by internal fluid flow (such as gas impact and turbulence), thereby reducing vibration noise. The interface between the PVC pipe and the second noise-reducing cotton 823 experiences sound wave reflection due to the difference in acoustic impedance between the materials; some sound waves attenuate after multiple reflections between the two layers, further reducing noise propagation efficiency.

[0265] When the fourth pipe 822 of the outer sound insulation duct 82 is made of PVC pipe, it is also corrosion resistant, suitable for complex environments (such as humid and chemical media), and extends the service life of the pipeline.

[0266] Furthermore, a support layer can be provided inside the outer soundproof duct 82, for example, using steel wire as the support layer. Specifically, the steel wire can be copper-plated steel wire with a diameter of about 1mm. When copper-plated steel wire with a diameter of about 1mm is used to form a rigid skeleton 84, it prevents the pipeline from collapsing or deforming due to internal pressure or external load, avoiding abnormal vibration noise caused by structural deformation. In addition, the high strength of the steel wire can limit the local vibration amplitude of the pipeline wall, especially having a significant inhibitory effect on low and medium frequency vibrations (such as vibrations caused by fluid pulsation).

[0267] In addition, the third tube 821 of the outer soundproof duct 82 can be an aluminum foil tube.

[0268] Specifically, an aluminum foil layer can be provided inside the support layer formed by the steel wire to form the aforementioned aluminum foil tube. The surface of the third tube 821 (aluminum foil tube) can be uniformly provided with second openings 83, i.e., sound-absorbing holes. When the sound-absorbing holes are uniformly distributed on the surface of the aluminum foil layer, a micro-resonance cavity can be formed. When sound waves are incident, the air column at the neck of the opening and the air inside the cavity form a resonance system, resonating and absorbing sound waves of specific frequencies, effectively reducing noise. Specifically, the thickness of the aluminum foil layer can be 0.07 mm or more, and the distribution of the second openings 83 on the aluminum foil layer is at least 8 per cubic centimeter. The aluminum foil itself, with a thickness ≥0.07 mm, has a certain sound insulation performance and can block high-frequency sound waves; at the same time, the metallic damping characteristics of the aluminum foil can consume some vibration energy, reducing the generation of secondary noise.

[0269] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this specification should not be determined by reference to the above description, but rather by reference to the foregoing claims and the full scope of their equivalents.

[0270] The above are merely preferred embodiments of this specification and are not intended to limit this specification. Various modifications and variations can be made to the embodiments described herein by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of protection of this specification.

Claims

1. An indoor air handling system, characterized in that, The indoor air handling system includes an outdoor unit, an indoor air handling unit, an indoor air delivery terminal, and a water circulation terminal; the water circulation terminal includes at least an indoor radiant terminal and a forced convection heat exchange terminal, and the heat exchange efficiency of the indoor radiant terminal is lower than that of the forced convection heat exchange terminal. The indoor air handling unit includes a first heat exchanger and a second heat exchanger; the first heat exchanger includes a first refrigerant channel and a water channel, wherein the water in the water channel can exchange heat with the refrigerant in the first refrigerant channel, and the water channel can selectively connect to the indoor radiant terminal and the forced convection heat exchange terminal; the second heat exchanger includes a second refrigerant channel and an air channel, wherein the air flowing through the air channel can exchange heat with the refrigerant in the second refrigerant channel; The indoor air handling unit includes an air inlet, an air outlet, and a fan. Air flowing in from the air inlet can flow through the air channel under the drive of the fan and then flow out from the air outlet to the indoor air delivery terminal. The first refrigerant channel and the second refrigerant channel can be connected to the refrigerant inlet and refrigerant outlet of the outdoor unit. The refrigerant output from the refrigerant outlet can be distributed to the first refrigerant channel and / or the second refrigerant channel.

2. The indoor air handling system according to claim 1, characterized in that, The indoor air handling unit includes a separate air handling module and an air supply module. The air supply module is partially or entirely installed above the ceiling, and the air handling module is wall-mounted below the ceiling. The air handling module has a first housing, in which a first heat exchanger and a second heat exchanger are disposed. The air supply module has a second housing, in which a fan is disposed. The first housing has an air inlet and an air outlet, and the second housing has an air inlet and an air outlet. The air outlet and the air inlet are connected by an air duct.

3. The indoor air treatment system according to claim 2, characterized in that, The first housing has a lateral dimension and a longitudinal dimension, wherein the lateral dimension is greater than the longitudinal dimension; The air handling module is installed against the wall and positioned horizontally. The first heat exchanger and the second heat exchanger are arranged laterally in the first housing; The first refrigerant channel, the second refrigerant channel, and the water channel all pass through the top wall of the first housing, or the first refrigerant channel, the second refrigerant channel, and the water channel are all located inside the first housing, and the refrigerant channel of the outdoor unit passes through the top wall of the first housing.

4. The indoor air handling system according to claim 3, characterized in that, The air handling module further includes an air purification unit, and the air purification unit, the first heat exchanger, and the second heat exchanger are arranged laterally in the first housing; The front sidewall of the first housing is removable or can be opened to remove the air purification unit; The air inlet includes a fresh air inlet and a return air inlet. Along the direction of air flow, the air inlet, the first heat exchanger, the second heat exchanger, and the air purification unit are arranged horizontally in sequence. The first heat exchanger is vertically positioned close to or adjacent to the rear side wall of the first housing.

5. The indoor air handling system according to claim 1, characterized in that, The indoor air handling unit includes an air handling module and an air supply module connected to each other. The air handling module has a first housing with an air inlet. The air supply module is used to allow indoor air to enter the air handling module from the air inlet. The first housing also has an opening, and the first housing further includes a first opening and closing structure, which is disposed at the opening to open and close the opening. The air handling module also includes a mating structure for sealing and adapting to the first opening and closing structure. When the first opening and closing structure is in the position of closing the opening, the first opening and closing structure and the mating structure are sealed and adapted at the connection; The first housing is provided with a heat exchanger and / or a filter element, and indoor air entering from the air inlet can pass through the heat exchanger and / or the filter element; the heat exchanger includes the first heat exchanger and the second heat exchanger; Along the direction of indoor air flow within the first housing, at least a portion of the connection is located upstream of the heat exchanger and / or the filter element, or at least a portion of the connection is disposed corresponding to the heat exchanger and / or the filter element.

6. The indoor air handling system according to claim 5, characterized in that, The first opening and closing structure includes a door body having opposing left and right sides, and opposing upper and lower sides, and the door body is rotatable relative to the opening; when the first opening and closing structure is in the closed position, the left side, the right side, the upper side, and the lower side are all sealed and adapted to the mating structure at the connection point, wherein the position where the left side or the right side is sealed and adapted to the mating structure is located upstream of the heat exchanger and / or the filter element or corresponds to the heat exchanger and / or the filter element; or, The first opening / closing structure includes a first door and a second door; the first door has opposing first left and first right sides, opposing first upper and first lower sides, and is rotatable to the left relative to the opening. The first left, first right, first upper, and first lower sides are all sealed and adapted to the mating structure at their connection points. At least the position where the first right side is sealed and adapted to the mating structure is located upstream of or corresponding to the heat exchanger and / or the filter element. The second door has opposing second left and second right sides, opposing second upper and second lower sides, and is rotatable to the right relative to the opening. The second left side, first right side, first upper and first lower sides are sealed and adapted to the opening at their connection points. The second right side portion, the second upper side portion, and the second lower side portion are all sealed and adapted to the mating structure at the connection point. At least the second left side portion is located upstream of or corresponding to the heat exchanger and / or the filter element at the position where it is sealed and adapted to the mating structure. The mating structure includes a mating plate connected to the heat exchanger or the first housing. The first right side portion is located upstream of or corresponding to the heat exchanger and / or the filter element at the position where it is sealed and adapted to the mating plate. The second left side portion is located upstream of or corresponding to the heat exchanger and / or the filter element at the position where it is sealed and adapted to the mating plate.

7. The indoor air handling system according to claim 1, characterized in that, The indoor air handling unit includes an air supply module, which is used to supply air to the indoor air delivery terminal through an air duct; The air supply module includes a second housing, and the fan is disposed inside the second housing. The second housing has an air inlet and an air outlet. The air outlet is used to connect with the air duct. Air entering from the air inlet can flow to the indoor air delivery terminal through the air outlet and the air duct under the drive of the fan. The fan includes a volute and an impeller. The volute has a volute inlet and a volute outlet. The volute outlet is spaced at a predetermined distance from the air outlet. A first noise reduction and flow guiding device is provided between the volute outlet and the air outlet. Alternatively, the side of the volute near the air inlet is spaced at a predetermined distance from the air inlet, and a second noise reduction and flow guiding device is provided between the side of the volute near the air inlet and the air inlet.

8. The indoor air handling system according to claim 7, characterized in that, A first noise reduction and airflow guiding device is provided between the volute outlet and the air outlet. The inner surface of the first noise reduction and airflow guiding device, the volute outlet, the air outlet, and the second housing form an airflow channel, and the flow area of ​​the airflow channel tends to decrease. A cavity is formed between the outer surface of the first noise reduction and flow guiding device and the second housing, and sound-absorbing cotton and / or sound-insulating cotton are provided in the cavity; or, A first noise reduction and airflow guiding device is provided between the volute outlet and the air outlet. The first noise reduction and airflow guiding device includes at least two noise reduction and airflow guiding plates. The two noise reduction and airflow guiding plates are arranged relatively at intervals, and the distance between the two noise reduction and airflow guiding plates tends to decrease along the direction of airflow. The two noise reduction guide plates, the volute outlet, the air outlet, and the second housing form an airflow channel, and the flow area of ​​the airflow channel tends to decrease. or, A first noise reduction and airflow guiding device is provided between the volute outlet and the air outlet. The air supply module also includes a partition plate, which, together with a portion of the second housing, forms a first static pressure box. The first noise reduction and airflow guiding device is located inside the first static pressure box. The volute outlet is fixed to the partition plate, which has through holes for air passage. A shock-absorbing structure and / or a sealing structure are provided between the periphery of the partition plate and the inner surface of the second housing, and / or, a shock-absorbing structure and / or a sealing structure are provided between the partition plate and the volute outlet.

9. The indoor air handling system according to claim 7, characterized in that, A second noise reduction and flow guiding device is provided between the side of the volute of the fan near the air inlet and the air inlet. The rotation shaft of the impeller extends in the longitudinal direction. The second noise reduction and flow guiding device is obliquely arranged in the longitudinal direction between the air inlet and the volute inlet to guide the air flowing in from the air inlet to the volute inlet. The volute inlet is positioned downwards, and the second noise reduction and airflow guiding device is positioned obliquely downwards between the air inlet and the volute inlet.

10. The indoor air handling system according to claim 1, characterized in that, The indoor air handling unit includes an air handling module and an air supply module connected to each other. The air handling module has a first housing, in which a first heat exchanger and a second heat exchanger are disposed. The air supply module has a second housing, in which a fan is disposed. The first housing is provided with an air inlet and an air outlet, and the second housing is provided with an air inlet and an air outlet. The indoor air handling system also includes a noise-reducing duct; the exhaust port and the air inlet are connected through the noise-reducing duct; the air outlet is connected to the noise-reducing duct to deliver air to the indoor air delivery terminal. The noise reduction duct includes an inner sound-absorbing duct and an outer sound-insulating duct, with the outer sound-insulating duct located outside the inner sound-absorbing duct. The inner sound-absorbing duct includes a first duct and a second duct, the first duct is located inside the second duct, and a first noise-reducing cotton is provided between the first duct and the second duct; The outer sound insulation duct includes a third duct and a fourth duct, the third duct is located inside the fourth duct, and a second noise reduction cotton is provided between the third duct and the fourth duct; The first tube and / or the third tube are provided with openings; or, the thickness of the second noise-reducing cotton is less than or equal to the thickness of the first noise-reducing cotton.

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