Air treatment system

Abstract

The utility model discloses an air processing system which comprises an air supply device, the air supply device comprises a first shell and an air supply fan arranged in the first shell, the first shell is provided with an air inlet and an air outlet, and air entering from the air inlet can flow to an indoor space through the air outlet and an air pipe under the driving of the air supply fan; the air supply fan comprises a volute and an impeller, the volute is provided with a volute inlet and a volute outlet, the volute outlet and the air outlet are arranged at a preset distance, a first noise reduction flow guide device is arranged between the volute outlet and the air outlet, and / or the side, close to the air inlet, of the volute of the air supply fan is arranged at a preset distance from the air inlet. A second noise reduction flow guide device is arranged between the side, close to the air inlet, of the volute of the air supply fan and the air inlet. According to the air treatment system provided by the embodiment of the invention, the noise can be reduced while enough air volume and air pressure are guaranteed, and the ideal mute effect can be achieved while the indoor air treatment effect is guaranteed.

Description

Technical Field

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

[0002] An air handling system is an electromechanical integrated system that processes air by filtering, purifying, heating, cooling, humidifying, dehumidifying, and transporting it to meet specific environmental requirements (such as temperature, humidity, and cleanliness).

[0003] An air handling unit consists of an indoor unit installed indoors and an outdoor unit installed outdoors. The indoor unit generates noise during operation, primarily from the fan that drives the airflow. Noise reduction is necessary to ensure a quieter user experience. Furthermore, during operation, the air processed by the indoor unit is delivered to the indoor space through ductwork. This delivery requires overcoming duct resistance, necessitating sufficient air pressure to reach the designated indoor space at a certain flow rate. Additionally, to ensure air handling efficiency, a sufficient airflow volume must be provided to the indoor space.

[0004] How to reduce noise while ensuring sufficient air pressure and air volume has become one of the key issues that need to be addressed in the research and development of indoor units.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides an air handling system that can reduce noise while ensuring sufficient airflow and air pressure, and achieve ideal quiet operation while ensuring effective indoor air handling, thereby effectively improving the user experience.

[0007] The specific technical solution of this utility model embodiment is as follows:

[0008] An air handling system includes an air supply device for supplying air to an indoor space through a duct. The air supply device includes an air supply fan and a first housing. The air supply fan is disposed within the first housing, which has an air inlet and an air outlet. The air outlet is connected to the duct, and air entering from the air inlet can flow into the indoor space through the air outlet and the duct under the drive of the air supply fan. The air supply fan includes a volute and an impeller. The volute has a volute inlet and a volute outlet. The volute outlet is disposed at a predetermined distance from the air outlet. A first noise reduction and flow guiding device is disposed between the volute outlet and the air outlet. Alternatively, the side of the volute of the air supply fan closest to the air inlet is disposed at a predetermined distance from the air inlet, and a second noise reduction and flow guiding device is disposed between the side of the volute of the air supply fan closest to the air inlet and the air inlet.

[0009] In a preferred 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 is obliquely arranged between the volute outlet and the air outlet in the left-right direction, and is used to guide the air flowing out of the volute outlet to the air outlet.

[0010] In a preferred 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 first housing form an airflow channel, and the flow area of ​​the airflow channel tends to decrease.

[0011] In a preferred embodiment, a cavity is formed between the outer surface of the first noise reduction and diversion device and the first housing, and sound-absorbing cotton and / or sound-insulating cotton are disposed in the cavity.

[0012] In a preferred embodiment, a first noise reduction and air guiding device is provided between the volute outlet and the air outlet. The air outlet is smaller in the lateral direction than the volute outlet. The center of the air outlet corresponds to or is substantially corresponding to the center of the volute outlet. One end of the first noise reduction and air guiding device is located near or at the volute outlet, and the other end of the first noise reduction and air guiding device is located near or at the air outlet.

[0013] In a preferred 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 one noise reduction and airflow guiding plate. The noise reduction and airflow guiding plate includes a perforated plate body and a cavity surrounded by the perforated plate body. Sound-absorbing cotton and / or sound-insulating cotton are provided in the cavity body. Alternatively, the noise reduction and airflow guiding plate includes a plate body and sound-absorbing cotton and / or sound-insulating cotton disposed on the inner side of the plate body. The plate body is planar or arc-shaped.

[0014] In a preferred 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. The distance between the two noise reduction and airflow guiding plates tends to decrease along the direction of airflow. The two noise reduction and airflow guiding plates, the volute outlet, the air outlet, and the first housing form an airflow channel, and the flow area of ​​the airflow channel tends to decrease.

[0015] In a preferred embodiment, the airflow channel is provided with a plurality of spaced arc-shaped air guides, which are located downstream of the volute outlet and are used to rectify the air flowing out of the volute outlet.

[0016] In a preferred embodiment, a first noise reduction and flow guiding device is provided between the volute outlet and the air outlet. The number of air supply fans is 2, the number of air outlets is 2, the number of the first noise reduction and flow guiding devices is 2, the two air supply fans are arranged side by side, and the two air supply fans, the two first noise reduction and flow guiding devices, and the two air outlets are respectively arranged correspondingly.

[0017] In a preferred embodiment, a first noise reduction and air guiding device is provided between the volute outlet and the air outlet, and the air supply device further includes a baffle plate, which, together with a portion of the first housing, forms a first static pressure box, and the first noise reduction and air guiding device is located inside the first static pressure box.

[0018] In a preferred embodiment, the volute outlet is fixed to the partition plate, and the partition plate is provided with a through hole for air to pass through.

[0019] In a preferred embodiment, a shock-absorbing structure and / or a sealing structure are provided between the periphery of the partition and the inner surface of the first housing, and / or, a shock-absorbing structure and / or a sealing structure are provided between the partition and the volute outlet.

[0020] In a preferred embodiment, the volute is provided with a mounting member, which is directly or indirectly connected to the first housing. A shock absorber is provided on the inner surface of the first housing, and the shock absorber is located between the mounting member and the inner surface of the first housing.

[0021] In a preferred embodiment, a second noise reduction and flow guiding device is provided between the side of the volute of the blower near the air inlet and the air inlet. The rotation axis of the impeller extends in the longitudinal direction, and 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.

[0022] In a preferred embodiment, 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.

[0023] In a preferred embodiment, the second noise reduction and flow guiding device includes at least one noise reduction and flow guiding plate. The noise reduction and flow guiding plate 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. Alternatively, the noise reduction and flow guiding plate includes a plate body and sound-absorbing cotton and / or sound-insulating cotton disposed on the windward side of the plate body. The plate body is planar or arc-shaped.

[0024] In a preferred embodiment, a cavity is formed between the leeward side of the second noise reduction and flow guiding device and the first housing, and sound-absorbing cotton and / or sound-insulating cotton are disposed in the cavity.

[0025] In a preferred embodiment, there are two air supply fans and two air inlets. The two air supply fans are arranged side by side, and the two air supply fans and the two air inlets are respectively arranged correspondingly.

[0026] In a preferred embodiment, the inner surface of the first housing is further provided with aluminum foil, and sound-absorbing cotton and / or sound-insulating cotton are provided between the inner surface of the first housing and the aluminum foil.

[0027] In a preferred embodiment, the air handling system further includes an air handling device having a second housing containing a heat exchanger and / or a filter element. The second housing has a return air inlet and an exhaust air inlet, the return air inlet being used to allow air to flow into the air handling device, and the exhaust air inlet being used to communicate with the air inlet.

[0028] In a preferred embodiment, a second static pressure box is provided upstream of the return air inlet, and air can flow into the second housing through the return air inlet after flowing into the second static pressure box.

[0029] In a preferred embodiment, the air handling unit is located inside a cabinet, the second housing and the cabinet form the second static pressure box, and the cabinet is provided with a return air inlet.

[0030] In a preferred embodiment, the second static pressure chamber is provided with a flow guiding structure, which is used to guide the air entering the second static pressure chamber to the return air inlet.

[0031] In a preferred embodiment, the exhaust port is connected to the air inlet via a connecting pipe. The connecting pipe includes a first pipe and a second pipe. The first pipe includes a first inner pipe and a first outer pipe, with sound-absorbing cotton and / or sound-insulating cotton disposed between the first inner pipe and the first outer pipe. The second pipe includes a second inner pipe and a second outer pipe, with sound-absorbing cotton and / or sound-insulating cotton disposed between the second inner pipe and the second outer pipe. The first outer pipe is fitted inside the second inner pipe.

[0032] In a preferred embodiment, the air supply device and the air handling device are separately arranged, with the air supply device partially or entirely installed above the ceiling, and the air handling device installed in a wall-mounted manner below the ceiling.

[0033] In a preferred embodiment, the air handling unit is installed against a wall and arranged horizontally. The second housing has a lateral dimension and a longitudinal dimension, with the lateral dimension being larger than the longitudinal dimension. A heat exchanger is provided inside the second housing, comprising a first heat exchanger and a second heat exchanger. The first heat exchanger and the second heat exchanger are arranged laterally in the first housing. The first heat exchanger is used for heat exchange between the refrigerant and the air flowing in from the return air vent, and the second heat exchanger is used for heat exchange between the refrigerant and water. The water after heat exchange is supplied to the indoor radiant duct to treat the indoor air.

[0034] In a preferred embodiment, the first heat exchanger has a first refrigerant inlet and a first refrigerant outlet in its first refrigerant channel, and the second heat exchanger has a second refrigerant inlet and a second refrigerant outlet in its second refrigerant channel. The second heat exchanger includes a water channel with a water channel inlet and a water channel outlet. The first and second refrigerant channels are connected to the refrigerant channel of the outdoor unit. The first, second, and water channels all penetrate the top wall of the second housing, or the first, second, and water channels are all located inside the second housing, and the refrigerant channel of the outdoor unit penetrates the top wall of the second housing. The return air vent is located on the side wall or bottom wall of the first housing.

[0035] In a preferred embodiment, the air handling device further includes an air purification unit. Along the direction of airflow, the return air vent, the second heat exchanger, the first heat exchanger, and the air purification unit are arranged horizontally in sequence. The front sidewall of the second housing is removable or can be opened to remove the air purification unit.

[0036] In a preferred embodiment, the second housing is further provided with a fresh air inlet, and the second housing has a fresh air channel and a return air channel that are isolated from each other; a fresh air filter is provided in the fresh air channel, and an opening for removing the fresh air filter is provided on the wall of the fresh air channel; the fresh air channel also has an openable or detachable opening and closing structure, which is used to open and close the opening, and when the opening and closing structure is in the closed position, the opening and closing structure is sealed and adapted to the wall of the fresh air channel.

[0037] In a preferred embodiment, the opening and closing structure includes a magnetic adsorption plate, which is used to magnetically adhere to the wall of the fresh air duct and cover the opening.

[0038] The technical solution of this utility model has the following significant beneficial effects:

[0039] The air handling system provided in this application embodiment includes a noise reduction and flow guiding device within the first housing of the air supply device. For example, a first noise reduction and flow guiding device is provided between the volute outlet and the air outlet, and / or a second noise reduction and flow guiding device is provided between the side of the volute of the air supply fan near the air inlet and the air inlet. When the noise reduction and flow guiding device includes a flow guiding structure with flow guiding function, the noise reduction and flow guiding device 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 significant aerodynamic noise. That is, it can effectively control the generation of noise directly from the source, thereby achieving a better quiet effect. In addition, the noise reduction and flow guiding device itself can also include a noise reduction structure with noise reduction function, which can block and / or absorb noise using its own noise reduction structure. Alternatively, when the noise reduction and flow guiding device includes a noise reduction structure with noise reduction function, the noise reduction and flow guiding device can block and / or absorb noise; in addition, by reasonably arranging the position of the noise reduction and flow guiding device (so that it is located on the flow channel between the air inlet, the volute, and the air outlet), the noise reduction and flow guiding device can also have a flow guiding function, which can guide the airflow so that the airflow can flow efficiently and smoothly.

[0040] 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. Within the spirit and scope of the appended claims, embodiments of the present invention include many changes, modifications, and equivalents. 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. Attached Figure Description

[0041] 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 illustrative 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.

[0042] Figure 1 This is a schematic diagram of the structure of an air supply device in an air handling system provided in the embodiments of this application;

[0043] Figure 2 This is an exploded view of an air supply device in an air handling system provided in the embodiments of this application;

[0044] Figure 3 This is one of the top views of an air supply device in an air handling system provided in the embodiments of this application after removing the top cover plate;

[0045] Figure 4 This is a second top view of an air supply device in an air handling system provided in this application, after the top cover has been removed;

[0046] Figure 5 This is a schematic diagram of the structure of an air handling system provided in the embodiments of this application;

[0047] Figure 6 This is a schematic diagram of the installation of an air handling system provided in the embodiments of this application on a flat balcony;

[0048] Figure 7 This is an isometric view of an air handling device in an air handling system provided in the embodiments of this application;

[0049] Figure 8 This is an exploded view of an air handling device in an air handling system provided in the embodiments of this application;

[0050] Figure 9 This is an exploded view of an air handling device in an air handling system provided in the embodiments of this application;

[0051] Figure 10 This is a schematic diagram showing the connection relationship between an air handling device and an air supply device in an air handling system provided in the embodiments of this application.

[0052] Figure 11 for Figure 10 A schematic cross-sectional view of a connecting pipe AA provided in the embodiments of this application;

[0053] Figure 12 for Figure 10 A schematic diagram of the internal structure of a second static pressure chamber provided in the embodiments of this application;

[0054] Figure 13 This is a schematic diagram of the internal structure of a noise reduction guide plate provided in the embodiments of this application;

[0055] Figure 14 This is a schematic diagram of the structure of an air outlet panel provided in the embodiments of this application;

[0056] Figure 15 for Figure 14 A magnified sectional view of section I in the middle.

[0057] Reference numerals in the figures of this application:

[0058] 200. Air handling system;

[0059] 5. Air supply device;

[0060] 50. First shell;

[0061] 501. Air Inlet;

[0062] 502. Air vent;

[0063] 51. Air supply fan;

[0064] 510. Snail shell;

[0065] 5101, volute inlet;

[0066] 5102. Volute outlet;

[0067] 511. First volute;

[0068] 512. Second volute;

[0069] 516. Partition;

[0070] 53. First noise reduction and airflow guiding device;

[0071] 530. Noise Reduction Deflector Plate;

[0072] 5302, Opening;

[0073] 531. Airflow channel;

[0074] 532. Sound-absorbing cotton and / or sound-insulating cotton;

[0075] 54. Second noise reduction and flow guiding device;

[0076] 55. Arc-shaped air guide component;

[0077] 56. First static pressure chamber;

[0078] 57. Air inlet panel;

[0079] 58. Air outlet panel;

[0080] 591. Top cover plate;

[0081] 592. Side frame;

[0082] 100. Outdoor unit;

[0083] 11. Refrigerant inlet;

[0084] 12. Refrigerant outlet;

[0085] 21. First heat exchanger;

[0086] 211. First refrigerant flow channel;

[0087] 212. The Way of Romance;

[0088] 22. Second heat exchanger;

[0089] 221. Second refrigerant flow channel;

[0090] 222. Water flow channel;

[0091] 223. Water pump;

[0092] 4. Air handling unit;

[0093] 40. Second shell;

[0094] 401. Front sidewall;

[0095] 402. Rear sidewall;

[0096] 403. Top wall;

[0097] 404. Bottom wall;

[0098] 405. Left side wall;

[0099] 406. Right side wall;

[0100] 41. Fresh air fan;

[0101] 411. New Opportunities;

[0102] 490. Fresh air duct;

[0103] 491. Fresh air filter element;

[0104] 492. Magnetic adsorption plate;

[0105] 412. Return air vent;

[0106] 413. Exhaust vent;

[0107] 414. First filter element;

[0108] 415. Second filter element;

[0109] 600. Balcony;

[0110] 6. Suspended ceiling;

[0111] 61. First refrigerant connection pipe;

[0112] 62. Second refrigerant connection pipe;

[0113] 610. First set of openings;

[0114] 620. Second set of openings;

[0115] 7. Connecting pipelines;

[0116] 71. First pipeline;

[0117] 711. First inner tube;

[0118] 712. First outer tube;

[0119] 72. Second pipeline;

[0120] 721. Second inner tube;

[0121] 722. Second outer tube;

[0122] 8. Second static pressure chamber;

[0123] 81. Return air inlet;

[0124] 82. Cabinet;

[0125] 83. Flow guiding structure;

[0126] 9. Aluminum foil;

[0127] X, horizontal direction;

[0128] Y, the height direction;

[0129] Z. Depth. Detailed Implementation

[0130] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0131] 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 "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0132] 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 application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0133] This invention provides an air handling system that can reduce noise while ensuring sufficient air volume and air pressure, and achieve ideal quiet operation while ensuring effective indoor air handling, thereby effectively improving the user experience.

[0134] Please refer to the following for comprehensive information. Figures 1 to 10 This application specification provides an air handling system 200, which may include: an air supply device 5 for supplying air to an indoor space through a duct; the air supply device 5 includes an air supply fan 51 and a first housing 50, the air supply fan 51 being disposed within the first housing 50, the first housing 50 having an air inlet 501 and an air outlet 502, the air outlet 502 being connected to the duct, and air entering from the air inlet 501 flowing into the indoor space under the drive of the air supply fan 51 through the air outlet 502 and the duct. The blower 51 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 flow guiding device 53 is provided between the volute outlet 5102 and the air outlet 502. And / or, the side of the volute 510 of the blower 51 near the air inlet 501 is set at a predetermined distance from the air inlet 501. 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.

[0135] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4In this embodiment of the application, the air handling system 200 is provided with an air supply device 5, which includes a first housing 50 and an air supply fan 51 disposed within the first housing 50. An air inlet 501 on the first housing 50 is used to connect to air that has been regulated for temperature and / or humidity and / or cleanliness and is to be supplied to the room. An air outlet 502 is connected to a duct and is used to deliver the air to the indoor space. In use, when the air supply fan 51 is started, driven by the air supply fan 51, the air regulated for temperature and / or humidity and / or cleanliness enters the first housing 50 through the air inlet 501, flows through the air supply fan 51, and is then delivered to the indoor space through the air outlet 502 and the duct, thereby regulating the air parameters (temperature and / or humidity and / or cleanliness) of the indoor space.

[0136] During operation, the blower 51 of the air supply device 5 inevitably generates some noise. The performance of the blower 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.

[0137] 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.

[0138] For the air handling system 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 selected supply fan 51 is working, 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 indoor air conditioning needs.

[0139] 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 diameter itself is small, the duct resistance is large, which will further aggravate the loss of static pressure.

[0140] 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 guiding device is provided in the first housing 50 of the air supply device 5.

[0141] The blower 51 within the first 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.

[0142] In the first 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.

[0143] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0144] In this embodiment, the volute outlet 5102 and the air outlet 502 are spaced at a predetermined distance. This predetermined distance between the volute outlet 5102 and the air outlet 502 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 its value is not specifically limited in this application.

[0145] 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 first 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 noise in the air flowing out of the volute outlet 5102.

[0146] 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.

[0147] Specifically, the inner surface of the first noise reduction and airflow guiding device 53, the volute outlet 5102, the air outlet 502 of the first housing 50, and the first housing 50 form an airflow channel 531. Along the airflow direction, the flow area of ​​the airflow channel 531 tends to decrease. When the airflow passes through the gradually narrowing airflow channel 531, the airflow volume and air pressure of the airflow flowing out of the volute outlet 5102 can be gradually increased by the guiding effect of the first noise reduction and airflow guiding device 53. This allows the airflow to maintain a high static pressure when it flows into the duct downstream of the air outlet 502 of the first 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).

[0148] In one embodiment, a cavity is formed between the outer surface of the first noise reduction and diversion device 53 and the first housing 50, and sound-absorbing cotton and / or sound-insulating cotton 532 are disposed in the cavity.

[0149] 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 first 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.

[0150] 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.

[0151] 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.

[0152] 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 or substantially corresponds to the center of the volute outlet 5102. One end of the first noise reduction and air guiding device 53 is located close to or at the volute outlet 5102, and the other end of the first noise reduction and air guiding device 53 is located close to or at the air outlet 502.

[0153] 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 located near or at the volute outlet 5102, and the other end is located near or at 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 3 As shown, the first noise reduction and airflow guiding device 53 cooperates with the first housing 50 to form a straight airflow channel 531 for airflow, and the flow area of ​​the airflow channel 531 tends to decrease along the airflow direction. The technical effect of the reduced airflow channel 531 can be referred to the description above, and will not be repeated here.

[0154] In one embodiment, a first noise reduction and flow guiding device 53 is provided between the volute outlet 5102 and the air outlet 502, and the first noise reduction and flow guiding device 53 includes at least one noise reduction and flow guiding plate 530.

[0155] like Figure 13 As shown, the noise reduction guide plate 530 includes a plate body with an opening 5302 and a cavity surrounded by the plate body with the opening 5302, wherein sound-absorbing cotton and / or sound-insulating cotton 532 are 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.

[0156] 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.

[0157] 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 openings 5302, 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.

[0158] 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 flowing out of 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.

[0159] 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 first 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.

[0160] 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 apart. 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 first housing 50 form an airflow channel 531, and the flow area of ​​the airflow channel 531 tends to decrease.

[0161] 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 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 airflow channel 531 formed by the two noise reduction and airflow guiding plates 530, the volute outlet 5102, the air outlet 502, and the first 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 airflow channel 531 is formed between the two noise reduction guide plates 530 and the first housing 50, which connects the volute outlet 5102 and the air outlet 502. When the airflow from the volute outlet 5102 flows through the airflow 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 airflow volume and air pressure of the airflow from 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 first 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).

[0162] 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.

[0163] like Figure 4 As shown, in one embodiment, a plurality of arc-shaped air guides 55 are arranged at intervals in the air flow 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.

[0164] 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.

[0165] 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.

[0166] 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 for uneven flow velocity between the center and edge 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 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.

[0167] In one embodiment, a first noise reduction and flow 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 flow 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 flow guiding devices 53, and the two air outlets 502 are respectively provided.

[0168] like Figure 6 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.

[0169] 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 first 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.

[0170] 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 device 5 in the height direction Y, the rotation axis of the impeller of the air supply fan 51 extends along the longitudinal direction, i.e., the air supply fan 51 is installed horizontally. 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 embodiment that can ensure that the first housing 50 of the air supply device 5 can be installed above the ceiling 6 can be applied to this application embodiment. Among them, when the rotation axis of the impeller of the air supply fan 51 extends completely along the longitudinal direction, the size required by the air supply device 5 in the height direction Y can be minimized.

[0171] In specific installation, the two air supply fans 51 are arranged side by side in a horizontal installation manner. When there are two air supply fans 51, there are two air outlets 502 on the first housing 50, and there are two first noise reduction and air guiding devices 53.

[0172] 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 first 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.

[0173] 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.

[0174] like Figure 1 and Figure 2 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 device 5 also includes a partition 516, which, together with a portion of the first 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.

[0175] In this embodiment, the air supply device 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 first housing 50, forming a first static pressure box 56 with a portion of the first 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 first 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.

[0176] 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.

[0177] 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 to or sealed against the inner surface of the first housing 50 to ensure that the air flowing out of the volute outlet 5102 can flow completely towards the air outlet 502.

[0178] like Figure 1 and Figure 2 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 first housing 50. When a shock-absorbing structure is provided between the periphery of the partition 516 and the inner surface of the first 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 first 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.

[0179] 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 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 be in a stable state, which is beneficial to achieving better noise reduction.

[0180] In one embodiment, the volute 510 is provided with a mounting member, which is directly or indirectly connected to the first housing 50. A shock-absorbing member is provided on the inner surface of the first housing 50, and the shock-absorbing member is located between the mounting member and the inner surface of the first housing 50.

[0181] In this embodiment, the volute 510 can be connected to the first housing 50, wherein the connection between the volute 510 and the first 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 first housing 50 are not limited herein.

[0182] In this embodiment, a shock absorber is provided on the inner surface of the first housing 50. By providing a shock absorber between the mounting component and the inner surface of the first housing 50, mechanical noise generated when the blower 51 is working can be prevented from propagating outward through the first housing 50.

[0183] 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 volute 510 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 preventing additional turbulence caused by airflow impacting the inner wall of the volute 510.

[0184] 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, for guiding the air flowing in from the air inlet 501 to the volute inlet 5101.

[0185] In this embodiment, to achieve better noise reduction, the air supply device 5, which has a first housing 50, can be installed completely above the ceiling 6. To install the air supply device 5 on the ceiling 6, which has a limited height, the air supply fan 51 is installed horizontally.

[0186] Specifically, for the air supply fan 51, the thickness of its impeller is relatively small compared to the size of its outer periphery. To minimize the size required by the air supply device 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 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 embodiment that can ensure that the first housing 50 of the air supply device 5 can be installed above the ceiling 6 can be applied to this application embodiment. Among them, when the rotation axis of the impeller of the air supply fan 51 extends completely along the longitudinal direction, the size required by the air supply device 5 in the height direction Y can be minimized.

[0187] 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.

[0188] Taking the first housing 50 as an example, which has a rectangular box structure, 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 first housing 50.

[0189] The air inlet 501 of the first housing 50 is disposed on the side plate of the first 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 air guiding device 54 can be disposed between the air inlet 501 and the volute inlet 5101. The second noise reduction and air guiding device 54 is disposed obliquely in the longitudinal direction between the air inlet 501 and the volute inlet 5101, and is used to guide the air flowing in from the air inlet 501 to the volute inlet 5101.

[0190] For example, when the volute inlet 5101 is downwardly oriented, the second noise reduction and airflow guiding device 54 is obliquely positioned from top to bottom between the air inlet 501 and the volute inlet 5101. Alternatively, when the volute inlet 5101 is upwardly oriented, the second noise reduction and airflow guiding device 54 is obliquely positioned from bottom to top between the air inlet 501 and the volute inlet 5101.

[0191] 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 first 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.

[0192] 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.

[0193] 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.

[0194] 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.

[0195] 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.

[0196] 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 first 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.

[0197] like Figure 2 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 first housing 50, and sound-absorbing cotton and / or sound-insulating cotton 532 are disposed in the cavity.

[0198] In this embodiment, the second noise reduction and airflow guiding device 54 may have a windward surface that is in direct contact with the airflow flowing into 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 first housing 50. 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.

[0199] 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.

[0200] 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.

[0201] In one embodiment, there are two air supply fans 51 and two air inlets 501. The two air supply fans 51 are arranged side by side, and the two air supply fans 51 and the two air inlets 501 are respectively arranged correspondingly.

[0202] For a suspended ceiling 6 installed on a balcony 600mm high, its height is typically less than 350mm, making it difficult to fully install existing large fans above it. In a specific scenario where a clothes rack or similar device needs to be installed below the suspended ceiling 6, the height of the suspended ceiling 6 usually needs to be further reduced, typically to within 250mm. This makes it even more difficult to fully install existing large fans above the suspended ceiling 6.

[0203] 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 first 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.

[0204] 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 device 5 in the height direction Y, the rotation axis of the impeller of the air supply fan 51 extends along the longitudinal direction, i.e., the air supply fan 51 is installed horizontally. 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 embodiment that can ensure that the first housing 50 of the air supply device 5 can be installed above the ceiling 6 can be applied to this application embodiment. Among them, when the rotation axis of the impeller of the air supply fan 51 extends completely along the longitudinal direction, the size required by the air supply device 5 in the height direction Y can be minimized.

[0205] like Figure 3 As shown, during installation, the two air supply fans 51 are horizontally installed side-by-side, with each fan corresponding to one of the two air inlets 501. Specifically, each air supply fan 51 may include a first volute 511, a first impeller disposed within the first volute 511, a second volute 512, and a second impeller disposed within the second volute 512. The first volute 511 has a volute inlet 5101 and a volute outlet 5102, and the second volute 512 has both a volute inlet 5101 and a volute outlet 5102. One air inlet 501 corresponds to the volute inlet 5101 of the first volute 511, and the other air inlet 501 corresponds to the volute inlet 5101 of the second volute 512. The air entering the first housing 50 from the air inlets 501 can be evenly and efficiently guided to the two air supply fans 51.

[0206] like Figure 2 , Figure 14 and Figure 15 As shown, in one embodiment, the inner surface of the first housing 50 is further provided with aluminum foil 9, and sound-absorbing cotton and / or sound-insulating cotton 532 are provided between the inner surface of the first housing 50 and the aluminum foil 9.

[0207] In this embodiment, aluminum foil 9 can be provided on the inner surface of the first housing 50. The aluminum foil 9 can form a heat insulation cavity inside the first housing 50. When the air after heat exchange flows into the first 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.

[0208] Furthermore, at least one of sound-absorbing cotton and sound-insulating cotton can be disposed between the inner surface of the first housing 50 and the aluminum foil 9. That is, the aluminum foil 9 and the first housing 50 can be used to form a mounting cavity for installing the sound-absorbing cotton or sound-insulating cotton. In addition, the sound-absorbing cotton or sound-insulating cotton can be disposed on the outer surface of the first housing 50. For example, it can be fixed to the outer surface of the first housing 50 by adhesive bonding.

[0209] The specific forms and functions of sound-absorbing cotton and sound-insulating cotton can be referred to the detailed description of the above embodiments, and will not be repeated here.

[0210] When sound-absorbing cotton is provided between the inner surface of the first housing 50 and the aluminum foil 9, the aluminum foil 9 may have corresponding openings. When sound-insulating cotton is provided between the inner surface of the first housing 50 and the aluminum foil 9, the aluminum foil 9 may or may not have openings. When the aluminum foil 9 does not have openings, the aluminum foil 9 itself is also equivalent to a layer of sound-insulating material.

[0211] When the aluminum foil 9 has uniformly distributed openings on its surface, a micro-resonant cavity can be formed inside the first shell 50 enclosed by the aluminum foil 9. When sound waves are incident, the air column at the air inlet 501 and the air inside the cavity enclosed by the aluminum foil 9 form a resonance system, which resonates and absorbs sound waves of specific frequencies (i.e., the Helmholtz silencing principle), effectively reducing narrowband noise (such as characteristic frequency noise generated by high-speed fluid flow). Specifically, the thickness of the aluminum foil 9 can be greater than 0.07 mm, and the distribution of openings on the aluminum foil 9 is at least 8 per cubic centimeter. Among them, the aluminum foil with a thickness of ≥0.07 mm itself 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 9 can consume some vibration energy and reduce the generation of secondary noise. In addition, the smooth inner surface of the aluminum foil 9 can optimize the fluid flow field in the pipeline and reduce aerodynamic noise caused by turbulence or eddies.

[0212] In one feasible implementation, such as Figure 2 As shown, an air outlet plate 58 can be provided on one side of the first housing 50, which is directly opposite the volute outlet 5102. The air outlet plate 58 can be located on the outer side of the first housing 50. Alternatively, it can be located on the inner side of the first 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 placing the air outlet plate 58, which incorporates the aluminum foil 9, sound-absorbing cotton, and / or sound-insulating cotton 532, at the air outlet 502 of the first housing 50, the noise reduction and heat insulation effects achievable by the aforementioned 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 first housing 50.

[0213] In addition, an air inlet plate 57 can be provided at the air inlet 501 provided in the first 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 first housing 50 can also be provided in 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.

[0214] like Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 10 As shown, in one embodiment, the air handling system 200 further includes an air handling device 4. The air handling system 200 has a second housing 40, in which a heat exchanger and / or filter element are disposed. The second housing 40 has a return air inlet 412 and an exhaust air inlet 413. The return air inlet 412 is used to allow air to flow into the air handling device 4, and the exhaust air inlet 413 is used to communicate with the air inlet 501.

[0215] In this embodiment, the air handling system 200 further includes an air handling device 4, which has a second housing 40, mainly used for installing core functional components such as heat exchangers and / or filter elements.

[0216] The second housing 40 is provided with a return air inlet 412 and an exhaust air inlet 413. The exhaust air inlet 413 of the second housing 40 and the air inlet 501 of the first housing 50 are connected by a pipeline. After the air supply fan 51 is started, air can flow into the second housing 40 through the return air inlet 412, and then into the first housing 50 through its exhaust air inlet 413 and the air inlet 501 of the first housing 50.

[0217] like Figure 10 As shown, a second static pressure box 8 is provided upstream of the return air vent 412, and air can flow into the second housing 40 through the return air vent 412 after flowing into the second static pressure box 8.

[0218] Please combine Figure 12As shown, the second static pressure box 8 is equipped with a return air inlet 81. During the flow of air through the return air inlet 81, through the second static pressure box 8, and then through the return air outlet 412 into the first housing 50, the second static pressure box 8 can reduce the noise of the flowing air, thereby ensuring a better quiet experience for the user. Specifically, the flow cross-sectional dimension of the second static pressure box 8 is larger than the flow area of ​​the return air inlet 81. When airflow flows from the return air inlet 81, which has a smaller flow area, into the second static pressure box 8, which has a larger flow cross-sectional dimension, the second static pressure box 8 can reduce the aerodynamic noise of the airflow flowing in from the return air inlet 81, making the airflow smoother, thereby achieving the purpose of noise reduction.

[0219] In one specific embodiment, the air handling device 4 is located inside the cabinet 82, the second housing 40 cooperates with the cabinet wall of the cabinet 82 to form the second static pressure box 8, and the cabinet 82 is provided with a return air inlet 81.

[0220] When the air handling unit 4 is installed in a concealed manner, for example, when the air handling unit 4 is located inside the cabinet 82, the second housing 40 and the cabinet 82 can form a second static pressure box 8. The gap between the cabinet 82 and the second housing 40 forms a channel for air circulation.

[0221] The return air inlet 81 can be installed on the cabinet 82. By cleverly utilizing the cabinet 82, the air handling system 200 does not need to have an additional second static pressure box 8, which simplifies the structure and reduces the installation size of the air handling device 4.

[0222] like Figure 12 As shown, in one embodiment, a flow guiding structure 83 is provided inside the second static pressure box 8, which is used to guide the air entering the second static pressure box 8 to the return air port 412.

[0223] In this embodiment, the return air inlet 81 and the return air outlet 412 are typically spaced a certain distance apart and are not directly opposite each other. Taking the example where the return air inlet 81 is located on the top wall of the second static pressure box 8 and the return air outlet 412 is located on the side wall of the second housing 40, by providing a flow guiding structure 83 inside the second static pressure box 8, the air flowing in from the return air inlet 81 can be directed to the return air outlet 412. Specifically, the flow guiding structure 83 may include at least one baffle and / or at least one baffle. The baffle or baffle can guide the air, thereby allowing the air to flow smoothly along a predetermined path, reducing noise caused by turbulence, eddies, and pressure changes that may occur during airflow, and further achieving a noise reduction effect. The predetermined path may vary depending on the positions of the return air inlet 81 and the return air outlet 412, the specific structure of the flow guiding structure 83, etc. For example, the airflow guiding structure 83 may include multiple arc-shaped airflow guides, one end of which is located at the return air inlet 412, and the other end extends tangentially to the return air inlet 81. In use, the airflow introduced from the return air inlet 81 along the vertical downward direction can be smoothly turned into a horizontal direction, directly opposite the return air inlet 412.

[0224] like Figure 11 As shown, in one embodiment, the exhaust port 413 is connected to the air inlet 501 via a connecting pipe 7. The connecting pipe 7 includes a first pipe 71 and a second pipe 72. The first pipe 71 includes a first inner pipe 711 and a first outer pipe 712. Sound-absorbing cotton and / or sound-insulating cotton 532 are disposed between the first inner pipe 711 and the first outer pipe 712. The second pipe 72 includes a second inner pipe 721 and a second outer pipe 722. Sound-absorbing cotton and / or sound-insulating cotton 532 are disposed between the second inner pipe 721 and the second outer pipe 722. The first outer pipe 712 is sleeved inside the second inner pipe 721.

[0225] In this embodiment, the exhaust port 413 and the air inlet 501 are connected by a connecting pipe 7, which can be formed by multiple inner and outer pipes. For example, taking the connecting pipe 7 as including a first pipe 71 and a second pipe 72, the first pipe 71 and the second pipe 72 themselves can be a multi-layered composite structure. The first pipe 71 may include a first inner pipe 711, a first outer pipe 712, and sound-absorbing cotton and / or sound-insulating cotton 532 disposed between the first inner pipe 711 and the first outer pipe 712. For the first pipe 71 itself, it can achieve noise reduction by setting sound-absorbing and / or sound-insulating materials between the first inner pipe 711 and the first outer pipe 712; for the second pipe 72 itself, it can achieve noise reduction by setting sound-absorbing and / or sound-insulating materials between the second inner pipe 721 and the second outer pipe 722; when the first pipe 71 and the second pipe 72 form an inner-nested structure, that is, when the first outer pipe 712 is nested inside the second inner pipe 721, the noise reduction effects of the two can be superimposed, further improving the noise reduction effect of the connecting pipe 7.

[0226] In one specific implementation, to further improve the noise reduction effect of the connecting pipe 7, the specific structure of the connecting pipe 7 can be optimized. For example, the main body of the first pipe 71 and the second pipe 72 can adopt a composite structure, such as a pipe structure with PVC mesh reinforcement. Specifically, both the inner and outer layers of the pipe are provided with PVC membranes, and a mesh layer is provided between the two PVC membranes.

[0227] The inner and outer PVC membranes possess certain sound insulation properties, absorbing some sound wave energy through their damping characteristics and reducing sound propagation through the pipe walls. Simultaneously, the airtightness of the PVC membrane prevents vibrations generated by gas flow from being directly transmitted to the outside. The middle mesh layer has high strength and rigidity, enhancing the overall structural rigidity of the pipeline and suppressing high-frequency vibrations caused by internal fluid flow (such as gas impact and turbulence), thereby reducing vibration noise. The interface between the PVC membrane and the mesh layer 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.

[0228] When PVC membranes are selected for both the inner and outer layers, they offer corrosion and weather resistance, making them suitable for complex environments (such as humid or chemical media) and extending the service life of the pipeline. Furthermore, the mesh layer provides structural support, while the PVC membrane maintains flexibility, allowing the pipeline to adapt to certain bending deformations and preventing increased noise caused by the fracture of rigid structures.

[0229] Furthermore, a support layer can be provided on the inner side of the first pipe 71 and the second pipe 72, and a steel wire can be used as the support layer. Specifically, the steel wire can be a copper-plated steel wire with a diameter of about 1 mm.

[0230] When copper-plated steel wire with a diameter of about 1 mm is used to form a rigid skeleton, it prevents the pipeline from collapsing or deforming due to internal pressure or external load, and avoids abnormal vibration and 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 for low- and medium-frequency vibrations (such as vibrations caused by fluid pulsation).

[0231] Furthermore, an aluminum foil layer can be disposed on the inner side of the support layer formed by the steel wire. The surface of this aluminum foil layer can be uniformly perforated. When the uniformly distributed perforations on the surface of the aluminum foil layer form a micro-resonance cavity, when sound waves are incident, the air column at the neck of the perforation and the air inside the cavity form a resonance system, resonating and absorbing sound waves of specific frequencies (i.e., the Helmholtz silencing principle), effectively reducing narrowband noise (such as characteristic frequency noise generated by high-speed fluid flow). Specifically, the thickness of the aluminum foil layer can be greater than 0.07 mm, and the perforation distribution 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; simultaneously, the metallic damping characteristics of the aluminum foil can dissipate some vibration energy, reducing the generation of secondary noise.

[0232] In addition, the smooth surface inside the aluminum foil layer can optimize the fluid flow field in the pipeline and reduce aerodynamic noise caused by turbulence or eddies.

[0233] In one embodiment, the air supply device 5 and the air handling device 4 are separately arranged. The air supply device 5 is partially or entirely arranged above the ceiling 6, and the air handling device 4 is wall-mounted below the ceiling 6.

[0234] In this embodiment, the air handling system 200 may include a separate air handling unit 4 and an air supply unit 5. When the air handling unit 4 and the air supply unit 5 are separated, the original air handling system 200, which was originally a large size, can be divided into two relatively smaller sizes. When the air handling unit 4 and the air supply unit 5 are installed separately, they can be flexibly installed using the appropriate installation space in a single-level setting, which is beneficial for the installation and application of the air handling system 200 in single-level settings with limited installation space.

[0235] like Figure 6As shown, for application scenarios with a suspended ceiling 6, the air supply device 5 can be installed on the upper part of the suspended ceiling 6, and the air handling unit 4 can be installed on the lower part of the suspended ceiling 6 in a wall-mounted manner. For the air supply device 5, an air supply fan 51 is installed inside its first housing 50. Since the air supply fan 51 is installed, it will generate some noise during operation. By installing the air supply device 5 at least partially on the upper part of the suspended ceiling 6, the air supply fan 51 can be moved away from the user, and the noise generated by the air supply fan 51 during operation can be isolated by the suspended ceiling 6. This not only enables the installation and application of the air handling system 200 in a single-level scenario, but also ensures that the air handling system 200 achieves a better quiet operation, guaranteeing a better user experience.

[0236] For single-level apartments, installation space is limited, and there is usually no separate equipment room, making the location for installing the air handling system 200 very restrictive. Furthermore, in single-level apartment scenarios, users expect efficient use of all interior space and do not want a large, independent machine installed indoors. Therefore, one of the main installation locations for the air handling system 200 is the balcony 600. In this embodiment, the air handling system 200 is primarily installed on the balcony 600 as an example. Of course, this embodiment does not preclude the possibility of installing the air handling system 200 in other scenarios.

[0237] When the air handling system 200 is installed on the balcony 600, the air supply device 5 can be installed above the ceiling 6 of the balcony 600, and the air handling device 4 can be wall-mounted on the side wall of the balcony 600. For aesthetic reasons, the air handling device 4 can be concealed in a cabinet on the balcony 600.

[0238] In one embodiment, the air handling unit 4 is installed against a wall and arranged horizontally. The second housing 40 has a lateral dimension and a longitudinal dimension, the lateral dimension being larger than the longitudinal dimension. A heat exchanger is provided inside the second housing 40, the heat exchanger including a first heat exchanger 21 and a second heat exchanger 22. The first heat exchanger 21 and the second heat exchanger 22 are arranged horizontally in the first housing 50. The first heat exchanger 21 is used for heat exchange between refrigerant and air flowing in from the return air vent 412, and the second heat exchanger 22 is used for heat exchange between refrigerant and water. The water after heat exchange is used to supply indoor radiant pipes to treat the indoor air.

[0239] In this embodiment, the second housing 40 can be a hollow box structure. Of course, the second housing 40 can also have other regular or irregular structures. In this embodiment, the second housing 40 is mainly described as being in the shape of a cuboid or a cuboid.

[0240] The second housing 40 has a lateral dimension (i.e., length) and a longitudinal dimension (i.e., height), wherein the lateral dimension is greater than the longitudinal dimension. When the air handling unit 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 raising the air handling unit 4 above the ground, minimizing interference between its height and the user's head. When the air handling unit 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 around the air handling unit 4.

[0241] In this embodiment, taking the heat exchanger as an example including 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 the air flowing in from the return air vent 412. The heat-exchanged air can be supplied to the room to regulate the indoor air temperature. Specifically, the first heat exchanger 21 can be a finned heat exchanger or other types of heat exchangers. In this embodiment, a finned heat exchanger is mainly used as an example. The second heat exchanger 22 is used for heat exchange between the refrigerant and water. The heat-exchanged water is supplied to the indoor radiant piping to regulate the indoor air temperature. Specifically, the second heat exchanger 22 can be a plate heat exchanger or other types of heat exchangers. In this embodiment, a plate heat exchanger is mainly used as an example.

[0242] Since the first heat exchanger 21 can regulate the temperature of the air flowing in from the return air vent 412, when the air regulated by the first heat exchanger 21 enters the room, compared with the indoor radiant pipes regulating the indoor air temperature, directly supplying the temperature-regulated air into the room can regulate the room temperature more efficiently, so that the room temperature can efficiently approach the target temperature.

[0243] The first heat exchanger 21 can be shaped like a plate with a certain thickness. The first heat exchanger 21 has a length dimension, a width dimension, and a thickness dimension, with the length dimension typically being the maximum and the thickness dimension typically being the minimum. The second heat exchanger 22 can also be shaped like a plate with a certain thickness. The second heat exchanger 22 has a length dimension, a width dimension, and a thickness dimension, with the length dimension typically being the maximum and the thickness dimension typically being the minimum.

[0244] The first heat exchanger 21 and the second heat exchanger 22 are arranged laterally within the second housing 40, specifically such that the lengths of both heat exchangers are along the height direction Y (perpendicular to the lateral dimension) of the air handling unit 4. This arrangement maximizes the utilization of the lateral dimension of the air handling unit 4, allowing for the installation and arrangement of core components within the second housing 40. Furthermore, it effectively controls the lateral dimension of the air handling unit 4, preventing it from becoming excessively large and improving its adaptability. Specifically, the lateral dimension of the air handling unit 4 (i.e., the length of the second housing 40) can be controlled to within 900 mm, thus enabling it to accommodate the depth dimensions of all balconies 600.

[0245] like Figure 7 and Figure 8 As shown, 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, the second heat exchanger 22 includes a water channel 222, the water channel 222 has a water channel 222 inlet and a water channel 222 outlet, 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 222 all pass through the top wall 403 of the second housing 40, or the first refrigerant channel 211, the second refrigerant channel 221 and the water channel 222 are all located inside the second housing 40 and the refrigerant channel of the outdoor unit 100 passes through the top wall 403 of the second housing 40, and the return air vent 412 is located on the side wall or bottom wall 404 of the first housing 50.

[0246] 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 specifically be in the form of a refrigerant connector for connecting a refrigerant pipe.

[0247] The second heat exchanger 22 may include a heat exchange body for flowing refrigerant and water. This heat exchange body is generally plate-shaped. The second refrigerant flow channel 221 of the second heat exchanger 22 includes: a second internal refrigerant flow channel disposed within 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 communicating with the second internal refrigerant flow channel through the second refrigerant inlet and the second refrigerant outlet. Specifically, the second refrigerant inlet may be in the form of a refrigerant connector for connecting a refrigerant pipe, and the second refrigerant outlet may also be in the form of a refrigerant connector for connecting a refrigerant pipe.

[0248] The first refrigerant inlet and the second refrigerant inlet 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 refrigerant pipeline of the outdoor unit 100 (e.g., the first refrigerant connecting pipe 61 connected to the refrigerant inlet 11 of the outdoor unit 100, and the second refrigerant connecting pipe 62 connected to the refrigerant outlet 12 of the outdoor unit 100). The first refrigerant outlet and the second refrigerant outlet can also 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 refrigerant pipeline of the outdoor unit 100 (the first refrigerant connecting pipe 61 and the second refrigerant connecting pipe 62).

[0249] The second housing 40 may have a first set of openings 610 for the refrigerant piping of the outdoor unit 100 and a second set of openings 620 for the water channel 222. In this configuration, the first refrigerant channel 211, the second refrigerant channel 221, and the water channel 222 are all located inside the second housing 40, and the refrigerant channel of the outdoor unit 100 passes through the openings on the top wall 403 of the second housing 40. This arrangement reduces the number of openings and simplifies the connection and arrangement of external refrigerant piping located outside the second housing 40.

[0250] Alternatively, two sets of openings for passing through refrigerant channels can be provided on the top wall 403 of the second housing 40, each set of openings including 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 second 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 second housing 40.

[0251] In this embodiment, since the upper part of the top wall 403 of the second 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 second housing 40, and the first refrigerant channel 211, the second refrigerant channel 221, and the water channel 222 all pass through the top wall 403 of the second housing 40, or when the first refrigerant channel 211, the second refrigerant channel 221, and the water channel 222 are all located inside the second housing 40 and the refrigerant channel of the outdoor unit 100 passes through the top wall 403 of the second 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.

[0252] 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 side wall 405 / right side wall 406 of the second housing 40, the lateral dimension might be too large, preventing the second housing 40 from being properly arranged in a single-level environment. If the openings were located on the front side wall 401 / rear side wall 402 of the second housing 40, it would inevitably increase the front-to-back dimensions of the second housing 40, creating a sense of oppression and requiring a greater depth (Z) for cabinets, especially in scenarios with cabinets. If the openings were located on the bottom wall 404 of the second housing 40, it would reduce the ground clearance of the air handling unit 4, potentially interfering with the user's head and affecting the normal operation of equipment below the air handling unit 4. Therefore, the piping arrangement in this embodiment maximizes the optimization of the space arrangement of the second housing 40 below the ceiling 6, maximizing the installation adaptability of the second housing 40.

[0253] In this embodiment, the water in the water channel 222 can exchange heat with the refrigerant in the second refrigerant channel 221. The cooled water / heated water after heat exchange with the refrigerant in the second refrigerant channel 221 can be supplied to the indoor radiant terminal. The indoor radiant terminal releases cold or heat into the room to regulate the indoor temperature. The water channel 222 has a water channel 222 inlet and a water channel 222 outlet. A first water passage can be provided between the water channel 222 inlet and the plate-shaped body. A water pump 223 can be provided on the first water passage to provide driving force for water circulation. The water channel 222 inlet can be in the form of a water pipe connector for connecting a return water pipe.

[0254] A second water passage can be provided between the outlet of the water channel 222 and the plate-shaped body. This second water passage can be equipped with a flow switch, which can be used to control the flow of water. Specifically, the outlet of the water channel 222 can be in the form of a water pipe connector for connecting a water outlet pipe.

[0255] In this embodiment, the exhaust port 413 of the second housing 40 is located on the top wall 403 of the second housing 40. When the exhaust port 413 is located on the top wall 403 of the second housing 40, the exhaust port 413 can be efficiently and conveniently connected to the air supply device 5 located above the ceiling 6 through the shortest connection channel.

[0256] Specifically, the exhaust port 413 can be rectangular or quasi-rectangular, with its length direction perpendicular to the transverse direction (i.e., the length direction) of the second housing 40. The exhaust port 413 can be symmetrically arranged about the depth Z direction (i.e., the thickness direction) of the second housing 40, which helps to ensure the uniformity of the air outlet 413 of the second housing 40.

[0257] The air flowing in from the air inlet 501 needs to be regulated in temperature and / or humidity and / or cleanliness by flowing laterally through the components inside the second housing 40 before being discharged from the exhaust outlet 413. Devices for regulating the temperature and / or humidity and / or cleanliness of the air can be arranged sequentially along the lateral side of the second housing 40. The exhaust outlet 413 and the air inlet 501 can be located on opposite sides. The exhaust outlet 413 can be located on the top wall 403 near the first side wall of the second housing 40. Figure 7 or Figure 8 The right sidewall 406 shown in the diagram, the air inlet 501 can be close to the second sidewall of the second housing 40 ( Figure 7 or Figure 8 The left side wall 405 shown in the diagram allows air entering from the air inlet 501 to flow sufficiently through the temperature and / or humidity and / or cleanliness processing components within the second housing 40.

[0258] The air inlet 501 may include a fresh air inlet 411 connected to the outside and a return air inlet 412 connected to the inside. When the supply fan 51 is started, a negative pressure can be formed inside the second housing 40 of the air handling system 200, which introduces outdoor air into the second housing 40 through the fresh air inlet 411 and indoor air into the second housing 40 through the return air inlet 412, and the two mix inside the second housing 40.

[0259] Generally, there is a certain difference in temperature and humidity between outdoor fresh air and indoor air. When outdoor fresh air is directly introduced into the room, it will affect the indoor temperature and humidity, causing it to deviate from the preset target temperature and humidity. However, in this embodiment, the return air introduced into the room through the return air vent 412, compared to the case of introducing fresh air entirely from the outside, can effectively utilize the cooling or heating capacity of the indoor return air by introducing return air with the same temperature and humidity as the indoor air, thus reducing the fluctuation of indoor temperature and humidity caused by the total introduced air. This reduces the load on the air handling system 200 required for temperature and humidity regulation, saving energy.

[0260] The fresh air inlet 411 can be located on the top wall 403 of the second housing 40. The fresh air inlet 411 needs to be connected to the outside air through a pipe. When the fresh air inlet 411 is installed on the top wall 403, it can utilize the space above the ceiling 6 to install a bend structure in a concealed manner. After passing through the wall of the balcony 600, the pipe connects to the outside air.

[0261] Furthermore, the fresh air inlet 411 can be positioned close to the rear wall 402 of the second housing 40. When the fresh air inlet 411 is positioned close to the rear wall 402 of the second housing 40, it can be connected to the wall via a short, minimally bent inlet duct, thereby ensuring that external fresh air can be supplied into the second housing 40 with low resistance and a large flow rate. In addition, when the fresh air inlet 411 is positioned near the rear wall 402, interference with other ducts at the top can be avoided, ensuring that the ducts above the top wall 403 of the second housing 40 are arranged in the simplest and most reasonable manner.

[0262] In this embodiment, the openings on the top wall 403 of the second housing 40 for passing through water pipes and refrigerant pipes can be located between the exhaust port 413 and the fresh air inlet 411, specifically in the middle of the top wall 403, corresponding to the positions of the first heat exchanger 21 and the second heat exchanger 22 inside the second housing 40. This arrangement helps to reduce the length of the water and refrigerant pipes connecting the second heat exchanger 22 to the top wall 403 within the second housing 40, and also helps to reduce the length of the refrigerant pipe connecting the first heat exchanger 21 to the top wall 403 within the second housing 40. This results in a compact pipe arrangement inside the second housing 40, requiring less space, and thus helps to ensure the miniaturization of the second housing 40.

[0263] The return air vent 412 is located on the side wall or bottom wall 404 of the second housing 40.

[0264] In this embodiment, the return air vent 412 can be located on the side wall of the second housing 40 or on the bottom wall 404 of the second housing 40. The return air vent 412 is part of the air inlet 501 and is also positioned away from the exhaust vent 413. When the exhaust vent 413 is located on the top wall 403 and near the first side wall of the second housing 40, the fresh air vent 411 can be located on the top wall 403 of the second housing 40 and near the second side wall of the second housing 40, and the return air vent 412 can be located on the second side wall or near the bottom wall 404 of the second side wall.

[0265] In this embodiment, the fan may include a fresh air fan 41 and a supply air fan 51. When the fresh air fan 41 is activated, it can simultaneously generate negative pressure near both the fresh air inlet 411 and the return air inlet 412, thereby drawing both external and indoor air into the second housing 40. That is, 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, the same fresh air fan 41 can be used to draw in both types of air.

[0266] In one embodiment, the air handling device 4 further includes an air purification unit. Along the direction of air flow, the return air vent 412, the second heat exchanger 22, the first heat exchanger 21, and the air purification unit are arranged horizontally in sequence. The front sidewall 401 of the second housing 40 is detachable or can be opened to remove the air purification unit.

[0267] In this embodiment, the air handling device 4 may further include an air purification unit. Specifically, the air purification unit may be in the form of a filter element, although it can also take other forms. This embodiment mainly uses a filter element as an example for illustration. Depending on the location of the filter element, its function and form may vary slightly.

[0268] For example, the filter element may include a first filter element 414 disposed between the return air inlet 412 and the second heat exchanger 22. Along the airflow direction, the first filter element 414 may be disposed downstream of the return air inlet 412 and upstream of the second heat exchanger 22. The first filter element 414 can be used to purify the air flowing into the return air inlet 412. When the air inlet 501 of the second housing 40 includes a fresh air inlet 411 and a return air inlet 412, the first filter element 414 may include a fresh air filter element 491 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 second housing 40, the medium-efficiency filter element may be disposed against the second side wall, either inside or outside the second housing 40. When the medium-efficiency filter element is placed inside the second housing 40, the second 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.

[0269] The filter element may include a second filter element 415 disposed between the second heat exchanger 22 and the air outlet 502. Specifically, along the air flow direction, the second filter element 415 may be disposed downstream of the second heat exchanger 22 and upstream of the exhaust outlet 413. The second filter element 415 is used to purify the air after heat exchange in the second heat exchanger 22 before it is discharged through the exhaust outlet 413. Specifically, the second filter element 415 may be a high-efficiency filter element. Since the exhaust outlet 413 is disposed on the top wall 403 of the second housing 40, the air flow path within the second 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.

[0270] Alternatively, the filter element may include a first filter element 414 disposed between the air outlet 502 and the second heat exchanger 22, and a second filter element 415 disposed between the second heat exchanger 22 and the air outlet 502. Specifically, the specific arrangement and form of the first filter element 414 and the second filter element 415 can be referred to the above detailed description, and will not be repeated here. It should be noted that the specific forms of the first filter element 414 and the second filter element 415 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.

[0271] In this embodiment, the first heat exchanger 21 and the second heat exchanger 22 are arranged laterally in the second 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 unit 4. Furthermore, the filter element can also be arranged laterally within the second housing 40. Taking 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 unit 4. This arrangement maximizes the utilization of the lateral dimension of the air handling unit 4, allowing the core components to be installed and arranged within the second housing 40 of the air handling unit 4. Furthermore, it allows for effective control of the lateral dimension of the air handling unit 4, preventing it from becoming excessively large and improving the adaptability of the air handling unit 4 installation. Specifically, the lateral dimension of the air handling unit 4 (i.e., the length dimension of the second 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.

[0272] In this embodiment, the air inlet 501 of the second housing 40 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 second housing 40 through the fresh air inlet 411, and indoor air can flow into the second housing 40 through the return air inlet 412. After the outside air and indoor air flow into the second housing 40, they need to mix and exchange heat with the first heat exchanger 21. The air after heat exchange with the first heat exchanger 21 is then purified by the filter element and discharged from the second housing 40 through the exhaust port 413. Therefore, the return air inlet 412, the first heat exchanger 21, and the filter element are arranged sequentially along the airflow duct 212.

[0273] For the second heat exchanger 22, a temperature sensor for detecting water temperature is typically installed on the water flow channel 222. If the second heat exchanger 22 is located downstream of the first heat exchanger 21, during cooling operations, if the temperature detected by the temperature sensor is too low when the cold air flowing through the first heat exchanger 21 flows through the second heat exchanger 22, it may trigger the anti-freeze protection mechanism of the second heat exchanger 22, leading to malfunction of the corresponding component, increased energy consumption, and potentially reduced component lifespan. Therefore, the second heat exchanger 22 is located upstream of the first heat exchanger 21.

[0274] Furthermore, regarding the first heat exchanger 21 and the second heat exchanger 22 within the second housing 40, both are equipped with refrigerant flow channels. For example, during refrigeration, the air flowing in from the air inlet 501 of the second housing 40 is at a relatively high temperature. Condensation may occur on the surfaces of both heat exchangers 21 and 22 as they flow through them. The filter element itself is a component that is not prone to condensation. When the return air inlet 412, the second heat exchanger 22, the first heat exchanger 21, and the filter element are arranged sequentially along the airflow direction, it is equivalent to separating the components prone to condensation from the filter element. This facilitates centralized treatment of condensation generated by the components prone to condensation. 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 filter element.

[0275] Furthermore, the filter element is a relatively consumable part and needs to be replaced periodically after a predetermined period of use. When it is inserted into the second housing 40 with its thickness direction facing the front sidewall 401 and the rear sidewall 402, the filter element can be replaced by inserting and removing it.

[0276] The front sidewall 401 of the second housing 40 is detachable or openable for removing the filter element. When the front sidewall 401 of the second housing 40 is detachable or openable, the filter element can be easily replaced.

[0277] like Figure 8 and Figure 9 As shown, in one embodiment, the second housing 40 is further provided with a fresh air inlet 411, and the second housing 40 has a fresh air channel 490 and a return air channel that are isolated from each other; a fresh air filter element 491 is provided in the fresh air channel 490, and an opening for pulling out the fresh air filter element 491 is provided on the wall of the fresh air channel 490; the fresh air channel 490 also has an opening and closing structure that can be opened and closed or detached, the opening and closing structure is used to open and close the opening, and when the opening and closing structure is in the position of closing the opening, the opening and closing structure is sealed and adapted to the wall of the fresh air channel 490.

[0278] In this embodiment, the air inlet 501 on the second housing 40 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 air handling system 200 required for temperature and humidity regulation, thus saving energy.

[0279] The second housing 40 has a mutually isolated fresh air duct 490 and a return air duct. The fresh air duct 490 can be formed by a circumferentially enclosed duct or enclosure, and has opposing air inlets and outlets 502. The fresh air inlet 411 is the air inlet of the fresh air duct 490. The air outlet 502 of the fresh air duct 490 is located upstream of the heat exchanger, ensuring that the introduced fresh air can flow through the heat exchanger for heat exchange and temperature regulation. Furthermore, the air outlet 502 of the fresh air duct 490 can also be located upstream of a filter element (e.g., a high-efficiency filter element near the exhaust outlet 413) installed within the second housing 40, ensuring that the introduced fresh air can flow through the filter element for further filtration.

[0280] The return air duct has opposing air inlets and outlets 502, with the return air outlet 412 serving as the air inlet of the return air duct. The return air duct can share the space within the second housing 40 except for the fresh air duct 490, or the return air duct can be formed by enclosing a circumferentially closed pipe or enclosure.

[0281] When the supply fan 51 starts, a negative pressure is created inside the second housing 40 of the air handling system 200. Outdoor air is introduced into the second housing 40 through the fresh air inlet 411 and fresh air duct 490, while indoor air is introduced into the second housing 40 through the return air inlet 412 and return air duct. The two airs then mix within the second housing 40. By providing independent fresh air ducts 490 and return air ducts within the second housing 40, the introduction of air from the outside and the inside does not interfere with each other, thus ensuring the correct ratio of indoor air to outdoor air. In particular, this prevents indoor air from occupying too much space in the second housing 40, which could compromise the amount of outdoor air introduced.

[0282] Considering that fresh air needs to be introduced into the fresh air inlet 411 through a fresh air duct, and there is a certain pipe resistance when the air upstream of the fresh air inlet 411 is introduced through the fresh air duct, a fresh air fan 41 can be installed at the fresh air inlet 411 to increase the power of the fresh air and ensure the fresh air volume. The fresh air fan 41 is an adjustable speed fan; by adjusting the speed of the fresh air fan 41, the ratio of fresh air volume to return air volume can be adjusted.

[0283] A fresh air filter element 491 is installed within the fresh air duct 490. This fresh air filter element 491 is located downstream of the fresh air inlet 411 and is used to filter the external air flowing in through the fresh air inlet 411. This fresh air filter element 491 is a component that needs to be replaced and maintained regularly to ensure reliable filtration of the external air flowing in through the fresh air inlet 411.

[0284] To facilitate convenient replacement of the fresh air filter 491, an opening for pulling out the fresh air filter 491 is provided on the wall of the fresh air duct 490. The projection of the opening toward the fresh air filter 491 can cover the fresh air filter 491, thereby facilitating the operator to efficiently disassemble or install the fresh air filter 491 through the opening.

[0285] In addition, to ensure the airtightness of the fresh air duct 490, the fresh air duct 490 also has an opening and closing structure, which is used to open and close the opening. When the opening and closing structure is in the position of closing the opening, the opening and closing structure is adapted to the wall seal of the fresh air duct 490 around the opening.

[0286] The opening and closing structure can be an openable and closable structure, or a detachable structure. Furthermore, the opening and closing structure can combine an openable and closable structure with a detachable structure. Of course, the opening and closing structure can also be other forms capable of closing and opening the opening, 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.

[0287] When the opening and closing structure is detachable, it can be detachably connected to the opening of the fresh air duct 490. Specifically, the detachable connection can include snap-fit ​​connection, magnetic connection, latch connection, pin connection, etc. When the opening and closing structure is detachable, the detachable structure can be removed from the opening if it is necessary to open it.

[0288] In one specific embodiment, the system includes a magnetic adsorption plate 492, which is used to magnetically adhere to the wall of the fresh air duct 490 and cover the opening.

[0289] In this embodiment, when the detachable method is a magnetic connection, the detachable opening and closing 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 material. The magnetic adsorption plate 492 may be equipped with a magnet. When the magnetic adsorption plate 492 is placed at the opening, the attraction generated by the two allows the magnetic adsorption plate 492 to reliably cover the opening. When the fresh air filter 491 needs to be replaced, the opening and closing structure 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 to close the opening and closing structure. The overall operation is simple, convenient, and easy, allowing users to easily replace the filter at home.

[0290] In one specific embodiment, a second noise reduction and airflow guiding device 54 can be installed between the air inlet 501 and the volute inlet 5101, and a first noise reduction and airflow guiding device 53 can be installed between the volute outlet 5102 and the air outlet 502. The second noise reduction and airflow guiding device 54 guides and reduces the noise of the airflow before it enters the volute 510, and the first noise reduction and airflow guiding device 53, combined with the first noise reduction and airflow guiding and noise reduction device 53, achieves a significantly better airflow guiding and noise reduction effect than a single noise reduction and airflow guiding device. The specific reasons are as follows:

[0291] First, along the airflow direction, the second noise reduction and flow guiding device 54, the volute 510, and the first noise reduction and flow guiding device 53 are arranged in sequence, forming a synergistic optimization effect of front flow guiding into the volute and rear flow guiding and stabilizing.

[0292] The second noise reduction and flow guiding device 54 can assist the noise reduction treatment of the first noise reduction and flow guiding device 53. Specifically, the second noise reduction and flow guiding device 54 can pre-treat the airflow entering the volute 510, making the airflow entering the volute 510 more orderly (such as uniform velocity distribution and flow direction conforming to the profile of the volute 510), reducing the generation of turbulence in the volute 510 from the source. The reduced airflow turbulence in the volute 510 makes the impeller load more uniform, and the vibration and noise are weakened from the source (the blower 51).

[0293] Secondly, the combination of the two can produce a complementary noise reduction effect on the spectrum.

[0294] Among them, the second noise reduction and flow guiding device 54 mainly suppresses low-frequency turbulence noise (from the airflow impact before entering the volute 510); the first noise reduction and flow guiding device 53 mainly suppresses high-frequency eddy noise (from the uneven velocity after flowing out of the volute 510); the combination of the two can cover a wider frequency band of noise.

[0295] In addition, the two combinations can also achieve the blocking of vibration transmission.

[0296] The second noise reduction and flow guiding device 54 can reduce the pulse impact of airflow on the volute and reduce the vibration of the volute 510; the first noise reduction and flow guiding device 53 reduces the vibration of the air duct connected to the air outlet 502 by stabilizing the outflow, forming a dual vibration isolation path of source vibration reduction + end flow stabilization.

[0297] It should be noted that in the description of this application, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0298] The various embodiments described in this specification are presented in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0299] The above are merely a few embodiments of this utility model. Although the embodiments disclosed in this utility model are as described above, the content is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed in this utility model. However, the patent protection scope of this utility model shall still be determined by the scope defined in the appended claims.

Claims

1. An air handling system, characterized in that, The air handling system includes an air supply device for supplying air to the indoor space through ducts; The air supply device includes an air supply fan and a first housing. The air supply fan is disposed inside the first housing. The first 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 into the indoor space through the air outlet and the air duct under the drive of the air supply fan. The blower 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 of the blower closest to 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 of the blower closest to the air inlet and the air inlet.

2. The air handling system as described in claim 1, characterized in that, 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 is obliquely arranged between the volute outlet and the air outlet in the left-right direction, and is used to guide the air flowing out of the volute outlet to the air outlet.

3. The air handling system as described in claim 1, 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 first housing form an airflow channel, and the flow area of ​​the airflow channel tends to decrease.

4. The air handling system as described in claim 3, characterized in that, A cavity is formed between the outer surface of the first noise reduction and flow guiding device and the first housing, and sound-absorbing cotton and / or sound-insulating cotton are disposed in the cavity.

5. The air handling system as claimed in claim 1, characterized in that, A first noise reduction and air guiding device is provided between the volute outlet and the air outlet. The horizontal dimension of the air outlet is smaller than that of the volute outlet. The center of the air outlet corresponds to or is substantially corresponding to the center of the volute outlet. One end of the first noise reduction and air guiding device is located near or at the volute outlet, and the other end of the first noise reduction and air guiding device is located near or at the air outlet.

6. The air handling system as claimed in claim 1, characterized in that, A first noise reduction and airflow guiding device is provided between the volute outlet and the air outlet. The first noise reduction and flow guiding device includes at least one noise reduction and flow guiding plate; The noise reduction guide plate includes a perforated plate and a cavity enclosed by the perforated plate. The cavity is provided with sound-absorbing cotton and / or sound-insulating cotton. Alternatively, the noise reduction guide plate includes a plate and sound-absorbing cotton and / or sound-insulating cotton disposed on the inner side of the plate. The plate is planar or arc-shaped.

7. The air handling system as described in claim 1 or 6, characterized in that, 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 first housing form an airflow channel, and the flow area of ​​the airflow channel tends to decrease.

8. The air handling system as claimed in claim 7, characterized in that, The airflow channel is provided with a plurality of arc-shaped air guides arranged at intervals. The arc-shaped air guides are located downstream of the volute outlet and are used to rectify the air flowing out of the volute outlet.

9. The air handling system as claimed in claim 1, characterized in that, A first noise reduction and airflow guiding device is provided between the volute outlet and the air outlet. The number of air supply fans is 2, the number of air outlets is 2, the number of first noise reduction and air diversion devices is 2, the two air supply fans are arranged side by side, and the two air supply fans, the two first noise reduction and air diversion devices, and the two air outlets are respectively arranged correspondingly.

10. The air handling system as claimed in claim 1, characterized in that, A first noise reduction and air guiding device is provided between the volute outlet and the air outlet. The air supply device also includes a partition. The partition and part of the first housing form a first static pressure box. The first noise reduction and air guiding device is located inside the first static pressure box.

11. The air handling system as claimed in claim 10, characterized in that, The volute outlet is fixed to the partition plate, and the partition plate is provided with through holes for air to pass through.

12. The air handling system as claimed in claim 11, characterized in that, A shock-absorbing structure and / or a sealing structure are provided between the periphery of the partition and the inner surface of the first housing, and / or a shock-absorbing structure and / or a sealing structure are provided between the partition and the volute outlet.

13. The air handling system as claimed in claim 1, characterized in that, The volute is provided with a mounting component, which is directly or indirectly connected to the first housing. A shock absorber is provided on the inner surface of the first housing, and the shock absorber is located between the mounting component and the inner surface of the first housing.

14. The air handling system as claimed in claim 1, characterized in that, A second noise reduction and flow guiding device is provided between the side of the volute of the blower 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, and is used to guide the air flowing in from the air inlet to the volute inlet.

15. The air handling system as claimed in claim 14, characterized in that, 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.

16. The air handling system as claimed in claim 14, characterized in that, The second noise reduction and flow guiding device includes at least one noise reduction and flow guiding plate. The noise reduction and flow guiding plate 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. Alternatively, the noise reduction and flow guiding plate includes a plate body and sound-absorbing cotton and / or sound-insulating cotton disposed on the windward side of the plate body. The plate body is planar or arc-shaped.

17. The air handling system as claimed in claim 16, characterized in that, A cavity is formed between the leeward side of the second noise reduction and airflow guiding device and the first housing, and sound-absorbing cotton and / or sound-insulating cotton are provided in the cavity.

18. The air handling system as claimed in claim 14, characterized in that, The number of air supply fans is 2, the number of air inlets is 2, the two air supply fans are arranged side by side, and the two air supply fans and the two air inlets are respectively arranged correspondingly.

19. The air handling system as claimed in claim 1, characterized in that, The inner surface of the first housing is further provided with aluminum foil, and sound-absorbing cotton and / or sound-insulating cotton are provided between the inner surface of the first housing and the aluminum foil.

20. The air handling system as claimed in claim 1, characterized in that, The air handling system further includes an air handling device having a second housing, a heat exchanger and / or a filter element disposed therein, the second housing having a return air inlet and an exhaust air inlet, the return air inlet being used to allow air to flow into the air handling device, and the exhaust air inlet being used to communicate with the air inlet.

21. The air handling system as claimed in claim 20, characterized in that, A second static pressure box is provided upstream of the return air inlet, and air can flow into the second housing through the return air inlet after flowing into the second static pressure box.

22. The air handling system as claimed in claim 21, characterized in that, The air handling unit is located inside the cabinet, and the second housing and the cabinet form the second static pressure box. The cabinet is provided with a return air inlet.

23. The air handling system as claimed in claim 21, characterized in that, The second static pressure chamber is provided with a flow guiding structure, which is used to guide the air entering the second static pressure chamber to the return air vent.

24. The air handling system as claimed in claim 20, characterized in that, The exhaust vent is connected to the air inlet via a connecting pipe. The connecting pipe includes a first pipe and a second pipe. The first pipe includes a first inner pipe and a first outer pipe. Sound-absorbing cotton and / or sound-insulating cotton are provided between the first inner pipe and the first outer pipe. The second pipe includes a second inner pipe and a second outer pipe. Sound-absorbing cotton and / or sound-insulating cotton are provided between the second inner pipe and the second outer pipe. The first outer pipe is sleeved inside the second inner pipe.

25. The air handling system as claimed in claim 20, characterized in that, The air supply device and the air handling device are separately installed. The air supply device is partially or entirely installed above the ceiling, and the air handling device is installed in a wall-mounted manner below the ceiling.

26. The air handling system as claimed in claim 25, characterized in that, The air handling unit is installed against the wall and positioned horizontally. The second housing has a lateral dimension and a longitudinal dimension, wherein the lateral dimension is greater than the longitudinal dimension. The second housing is equipped with a heat exchanger, which includes a first heat exchanger and a second heat exchanger. The first heat exchanger and the second heat exchanger are arranged laterally in the first housing. The first heat exchanger is used for heat exchange between the refrigerant and the air flowing in from the return air vent. The second heat exchanger is used for heat exchange between the refrigerant and water. The water after heat exchange is used to supply the indoor radiant pipes to treat the indoor air.

27. The air handling system as claimed in claim 26, characterized in that, The first refrigerant flow channel of the first heat exchanger has a first refrigerant inlet and a first refrigerant outlet. The second heat exchanger has a second refrigerant inlet and a second refrigerant outlet in its second refrigerant flow channel. The second heat exchanger includes a water flow channel having a water flow channel inlet and a water flow channel outlet. The first refrigerant channel and the second refrigerant channel are connected to the refrigerant channel of the outdoor unit. The first refrigerant channel, the second refrigerant channel, and the water channel all penetrate the top wall of the second housing, or the first refrigerant channel, the second refrigerant channel, and the water channel are all located inside the second housing, and the refrigerant channel of the outdoor unit penetrates the top wall of the second housing. The return air vent is located on the side wall or bottom wall of the first housing.

28. The air handling system as claimed in claim 27, characterized in that, The air handling unit further includes an air purification unit. Along the direction of air flow, the return air vent, the second heat exchanger, the first heat exchanger, and the air purification unit are arranged horizontally in sequence. The front side wall of the second housing is detachable or can be opened to remove the air purification unit.

29. The air handling system as claimed in claim 28, characterized in that, The second housing is also provided with a fresh air inlet, and the second housing has mutually isolated fresh air channels and return air channels; A fresh air filter is installed inside the fresh air duct, and an opening for removing the fresh air filter is provided on the wall of the fresh air duct. The fresh air duct also has an openable or detachable opening and closing structure, which is used to open and close the opening. When the opening and closing structure is in the closed position, the opening and closing structure is adapted to the wall seal of the fresh air duct.

30. The air handling system as claimed in claim 29, characterized in that, The opening and closing structure includes a magnetic adsorption plate, which is used to magnetically adhere to the wall of the fresh air duct and cover the opening.

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