Air treatment equipment

Abstract

According to air treatment equipment, a space for containing backflow can be formed in a volute, and the situation that the backflow is accumulated at an air inlet, and consequently the air inlet effect is affected is prevented. The air treatment equipment comprises a shell, an air inlet and an air outlet, the centrifugal fan comprises a shell and a centrifugal fan assembly arranged in the shell, the centrifugal fan assembly comprises an impeller and a volute for containing the impeller, and the volute is located in the middle of the shell in the height direction of the shell. The minimum distance from one end face of the impeller to the inner wall face of the volute opposite to the end face of the impeller is a, the maximum distance from one end face of the impeller to the inner wall face of the volute opposite to the end face of the impeller is b, a and b meet the following relation that a = k * b, k is a constant, and k is larger than or equal to 0.23 and smaller than or equal to 0.82.

Description

Technical Field

[0001] This invention relates to an air handling apparatus for processing air. Background Technology

[0002] As air handling equipment, there are fresh air fans that circulate indoor air, air supply fans that transport air, total heat exchange equipment with a total heat exchange core for exchanging heat with air, dehumidification devices that dehumidify air, humidification devices that humidify air, and air purification devices that purify air.

[0003] A fresh air unit typically includes a casing with a fresh air inlet and an air outlet that supplies air to the indoor side. An airflow passage is formed between the fresh air inlet and the air outlet, and a centrifugal fan assembly is installed on the airflow passage, located on the side of the air outlet. Air purification components and air heating components (such as heat exchangers, electric heaters, etc.) may also be installed on the airflow passage.

[0004] The supply fan has a similar structure to the fresh air unit, but it can exhaust air from indoors to outdoors (exhaust fan).

[0005] The humidifier includes a housing with an air inlet and an air outlet, forming an airflow passage between them. A centrifugal fan assembly is installed on the airflow passage and is located on one side of the air outlet. The airflow passage also includes a humidification module (such as a permeable membrane humidification element or a spray humidification element), and may also include a water tank for supplying water to the humidification element, as well as valves for controlling the water circuit.

[0006] Dehumidifiers have a similar structure to humidifiers, with dehumidification elements (such as rotary dehumidifiers, heat exchangers (refrigeration dehumidification), adsorption dehumidifiers, etc.) installed inside the casing, and may also include a drain tank.

[0007] The aforementioned equipment is usually suspended inside the ceiling, with the air vents connected to the ductwork.

[0008] Generally, air handling equipment includes: a housing; and a centrifugal fan assembly disposed inside the housing, the centrifugal fan assembly including an impeller and a volute housing the impeller.

[0009] In existing air handling equipment (such as fresh air units), in order to improve the static pressure capacity of the fan, the volute is usually made very small to ensure that the fan's working efficiency is maximized. However, this results in a smaller space between the inner wall of the volute and the impeller, making it difficult to accommodate backflow (airflow enters the volute from the air inlet, flows along the volute, and finally flows out from the air outlet, and backflow is easily formed in the area of ​​the volute near the volute tongue). Backflow is prone to accumulate at the air inlet, affecting the air intake effect. Summary of the Invention

[0010] The present invention was made in view of the above-mentioned problems, and its purpose is to provide an air handling device that can form a space inside the volute to accommodate backflow, thereby preventing backflow from accumulating at the air inlet and affecting the air intake effect.

[0011] To achieve the above objectives, the present invention provides an air handling device, comprising: a housing; and a centrifugal fan assembly disposed inside the housing, the centrifugal fan assembly including an impeller and a volute housing the impeller, wherein the volute is located in the middle of the housing in the height direction. If, in the height direction of the housing, the minimum distance from one end face of the impeller to the inner wall surface of the volute opposite it is a, and the maximum distance is b, then a and b satisfy the following relationship: a = k × b, where k is a constant, and 0.23 ≤ k ≤ 0.82.

[0012] According to the air handling device of the present invention, by ensuring the height relationship between the inner wall surface of the volute and the impeller as described above, a space for accommodating backflow can be formed inside the volute, preventing backflow from accumulating at the air inlet and affecting the air intake effect.

[0013] Preferably, 0mm < a ≤ 15mm.

[0014] According to the air handling equipment of the present invention, by ensuring the height relationship between the inner wall surface of the volute and the impeller as described above, it is possible to avoid collision between the impeller and the volute during fan operation, reduce noise, and ensure smooth airflow. On the other hand, it is possible to prevent backflow from overflowing between the inner wall surface of the volute and the impeller, thereby avoiding turbulence at the air inlet and improving the static pressure capacity of the fan.

[0015] Preferably, the volute includes an air inlet, and if the diameter of the air inlet is c and the inner diameter of the impeller is d, then c ≥ d.

[0016] According to the air handling device of the present invention, by satisfying the above-mentioned relationship between the diameter of the air inlet and the inner diameter of the impeller, the air intake volume can be increased, and turbulence caused by the air intake airflow impacting the fan blades can be avoided, making the airflow into the volute smoother.

[0017] Preferably, the centrifugal fan assembly further includes a motor for driving the impeller. In the height direction of the housing, the side of the centrifugal fan assembly with the motor is designated as the lower side, and the side of the centrifugal fan assembly without the motor is designated as the upper side. In the height direction of the housing, the volute includes a lower air inlet on the lower side. The motor is disposed at the lower air inlet of the volute. The upper surface of the motor on the side with the lower air inlet is flush with or lower than the uppermost end of the portion of the volute that constitutes the lower air inlet.

[0018] According to the air handling apparatus of the present invention, since the upper surface of the motor on the side of the lower air inlet is flush with or lower than the uppermost end of the portion of the volute that constitutes the lower air inlet, it is beneficial to miniaturize the centrifugal fan assembly, and further beneficial to miniaturize the air handling apparatus. Furthermore, it minimizes the obstruction of the lower air inlet by the motor bracket, ensuring smooth airflow into the air inlet, thereby ensuring the air intake volume of the centrifugal fan assembly and ensuring fan performance.

[0019] Preferably, the centrifugal fan assembly further includes a motor for driving the impeller. In the height direction of the housing, the side of the centrifugal fan assembly with the motor is designated as the lower side, and the side of the centrifugal fan assembly without the motor is designated as the upper side. An air guide portion for forming a lower air inlet is provided on the volute. The motor is located at the air guide portion of the volute, and the upper surface of the motor is higher than the uppermost end of the air guide portion.

[0020] According to the air handling apparatus of the present invention, since the upper surface of the motor is higher than the uppermost end of the air guide section, the centrifugal fan assembly can be miniaturized, and the air handling apparatus can be further miniaturized. Furthermore, the motor shaft can be as short as possible, resulting in stable operation.

[0021] Preferably, the centrifugal fan assembly further includes a motor for driving the impeller. If, in the height direction of the housing, the side of the centrifugal fan assembly with the motor is designated as the lower side, and the side of the centrifugal fan assembly without the motor is designated as the upper side, and the shortest distance from the inner wall surface of the upper side of the housing to the upper surface of the volute is H1, and the shortest distance from the inner wall surface of the lower side of the housing to the lower surface of the volute is H2, then H1 and H2 satisfy the following relationship: 0.8≤H1 / H2≤1.2.

[0022] According to the air handling device of the present invention, by satisfying the above-mentioned relationship between the shortest distance from the inner wall surface of the upper side of the housing to the upper surface of the volute and the shortest distance from the inner wall surface of the lower side of the housing to the lower surface of the volute, it is beneficial to ensure the maximum air intake volume.

[0023] Preferably, H1 and H2 satisfy the following relationship: H1 > H2.

[0024] According to the air handling device of the present invention, by making the shortest distance from the inner wall surface of the upper side of the housing to the upper surface of the volute greater than the shortest distance from the inner wall surface of the lower side of the housing to the lower surface of the volute, it is more advantageous to ensure the maximum air intake.

[0025] Preferably, the centrifugal fan assembly further includes: a motor driving the impeller and a motor bracket supporting the motor; in the height direction of the housing, the side of the centrifugal fan assembly with the motor is designated as the lower side, and the side of the centrifugal fan assembly without the motor is designated as the upper side; an air guide portion for forming a lower air inlet is provided on the volute; the lower outer wall of the motor bracket is formed as a curved surface, and the curvature of the curved surface of the lower outer wall of the motor bracket is the same as the curvature of the air guide portion.

[0026] According to the air handling device of the present invention, by making the curvature of the lower outer wall of the motor bracket the same as the curvature of the air guide, the two curved surfaces can be used to form an air intake flow path for air guidance, which is beneficial to improving the air intake volume on the motor side of the centrifugal fan assembly.

[0027] Preferably, the diameter of the bottom surface of the motor bracket is larger than or equal to the diameter of the air guide.

[0028] According to the air handling equipment of the present invention, by making the diameter of the bottom surface of the motor bracket larger than or equal to the diameter of the air guide section, it is possible to ensure that the airflow is smoothly guided into the air inlet. Furthermore, because the diameter of the bottom surface of the motor bracket is larger, the centrifugal fan assembly is fixed to the housing via the motor bracket, resulting in good stability. Simultaneously, it facilitates the installation of a connection structure on the motor bracket that mates with the volute, leading to excellent assemblability.

[0029] Preferably, the air handling equipment is one of the following: a fresh air unit, a blower, a total heat exchange unit, a humidifier, a dehumidifier, and an air purifier.

[0030] According to the air handling equipment of the present invention, a space for accommodating backflow can be formed inside the volute in fresh air blowers, air supply blowers, total heat exchange equipment, humidifiers, dehumidifiers, air purifiers, etc., to prevent backflow from accumulating at the air inlet and affecting the air intake effect.

[0031] Preferably, a vent is provided on the housing, a heat exchanger is provided inside the housing, and the center line of the volute and the center line of the heat exchanger are flush in the height direction of the housing, or the center line of the volute and the center line of the vent are flush.

[0032] According to the air handling equipment of the present invention, since the centerline of the volute is flush with the centerline of the heat exchanger, or the centerline of the volute is flush with the centerline of the vent, the pressure loss inside the fan is minimized, and the airflow from the vent is smooth. Furthermore, the low pressure loss improves the air delivery effect, thereby ensuring the heat exchange efficiency of the heat exchanger. Attached Figure Description

[0033] Figure 1This is a perspective view schematically illustrating an air handling device according to an embodiment of the present invention.

[0034] Figure 2 This is a bottom view schematically illustrating an air handling device according to an embodiment of the present invention, wherein the bottom plate of the housing is omitted.

[0035] Figure 3 This is a partial side view schematically illustrating an air handling device according to an embodiment of the present invention.

[0036] Figure 4 This is a partial cross-sectional perspective view schematically illustrating an air handling device according to an embodiment of the present invention.

[0037] Figure 5 This is a side view schematically illustrating the centrifugal fan assembly included in the air handling equipment according to an embodiment of the present invention.

[0038] Figure 6 This is a perspective view schematically illustrating the motor and motor bracket included in the air handling equipment according to an embodiment of the present invention.

[0039] Figure 7 This is a side sectional view schematically illustrating the motor and motor bracket included in the air handling equipment according to an embodiment of the present invention.

[0040] Figure 8 This is a perspective view schematically illustrating the motor bracket included in the air handling equipment according to an embodiment of the present invention.

[0041] Figure 9 This is a schematic diagram illustrating the dimensional relationships of the components of the centrifugal fan assembly included in the air handling equipment according to an embodiment of the present invention.

[0042] Figure 10 This is a schematic diagram illustrating the dimensional relationship between the housing and the centrifugal fan assembly of the air handling equipment according to an embodiment of the present invention.

[0043] (Symbol Explanation)

[0044] 1. Air handling equipment

[0045] 10 Centrifugal fan assembly

[0046] 10a Centrifugal fan assembly for air supply

[0047] 10b Exhaust centrifugal fan assembly

[0048] 101 Impeller

[0049] 101a partition

[0050] 101b blade

[0051] 101c shaft hole

[0052] 102. Snail shell

[0053] 102a volute base plate

[0054] 102b volute cover

[0055] 102c air guide section

[0056] 103 motor

[0057] 103a Shaft

[0058] 104 Motor Bracket

[0059] DJ hoisting equipment

[0060] KT housing

[0061] XF New Airflow

[0062] SF air outlet

[0063] HF return air vent

[0064] PF exhaust vent

[0065] TF ventilation opening

[0066] JF air inlet

[0067] HX Total Heat Exchanger Core

[0068] SN Storage Department

[0069] SN1 Cylindrical section

[0070] SN11 diversion section

[0071] SN12 Storage Unit Main Body

[0072] SN2 bottom

[0073] DZ base

[0074] DZ1 Ring-shaped body

[0075] GD Fixed Post

[0076] GDA First Fixed Post

[0077] GDB Second Fixed Post

[0078] LJ Connector

[0079] QK gap

[0080] GX cable tray

[0081] SP Storage Space

[0082] ZG Cover

[0083] ZT Main Body

[0084] AZ Installation Department

[0085] DL guide surface

[0086] DL1 Storage Section Guide Surface

[0087] DL2 base guide surface

[0088] ND inner bottom Detailed Implementation

[0089] Various embodiments of the invention will now be described in detail, examples of which are shown in the accompanying drawings and described below. Although the invention will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the invention to those exemplary embodiments. Rather, the invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit and scope of the invention as defined by the appended claims.

[0090] Below, in conjunction with Figures 1 to 10 The air handling device 1 according to an embodiment of the present invention will be described.

[0091] (Overall structure of air handling unit 1)

[0092] In this embodiment, such as Figure 1 and Figure 2 As shown, the air handling unit 1 is a total heat exchange device, which is used, for example, by being suspended and fixed to the back space of the ceiling in an indoor space via a hanger such as DJ.

[0093] Air handling unit 1 includes a housing KT made of, for example, metal, with a foamed material or a flexible material bonded to the inner side of the housing KT. The housing KT is, for example, made by stamping a metal sheet. Therefore, while ensuring the strength of the housing KT, the foamed material or flexible material can be used to absorb noise, reduce abnormal sounds, and achieve excellent quietness. Furthermore, the foamed material or flexible material can be used to ensure airtightness and provide thermal insulation, thereby achieving a heat preservation effect. Alternatively, the housing KT can be an inner housing integrally formed by placing the foamed material or flexible material inside the metal housing. The airflow path is separated within the inner housing by partitions or the like. While ensuring airtightness, heat preservation, and thermal insulation, the inner housing has a simple structure, is easy to assemble, and facilitates the installation and maintenance of components.

[0094] The shell KT is formed in a generally cuboid shape, having a top plate, a bottom plate spaced apart from the top plate, and side plates extending from the periphery of the top plate to the periphery of the bottom plate (the top plate and bottom plate can be formed separately from the side plates, or they can be formed integrally with the side plates).

[0095] A fresh air inlet XF, an exhaust air outlet PF, a return air outlet HF, and a supply air outlet SF are provided on the side plate of the housing KT. Inside the housing KT, an air supply path is formed from the fresh air inlet XF to the supply air outlet SF; and an exhaust air path is formed from the return air outlet HF to the exhaust air outlet PF. A total heat exchange core HX, serving as a heat exchanger, is provided inside the housing KT. At least one of the bottom plate and top plate of the housing KT has a maintenance opening for the total heat exchange core HX to enter and exit, and a maintenance cover that can open and close the maintenance opening. The maintenance cover can also be used to inspect and repair filters and other components located in the airflow path within the housing KT, such as sensor assemblies, fan assemblies, and damper assemblies. The total heat exchange core HX has a first airflow channel forming part of the supply air path and a second airflow channel forming part of the exhaust air path. The airflow flowing through the first airflow channel can exchange heat with the airflow flowing through the second airflow channel.

[0096] The centrifugal fan assembly 10 is disposed within the housing KT and includes: a supply centrifugal fan assembly 10a disposed in the supply air path; and an exhaust centrifugal fan assembly 10b disposed in the exhaust air path.

[0097] When the air handling unit 1 processes air in an indoor space, for example, the centrifugal fan assembly 10 can draw outdoor air from the fresh air inlet XF into the air supply path within the housing KT and blow it out to the room from the air outlet SF. Conversely, it can draw indoor air from the return air inlet HF into the exhaust air path within the housing KT and blow it out to the outside from the exhaust air outlet PF. Furthermore, an ion generator can be installed near the air outlet SF in the air supply path to purify the air in the air supply path.

[0098] (Structure of centrifugal fan assembly)

[0099] The following reference Figures 2 to 8 The structure of the centrifugal fan assembly 10 of the present invention will be described.

[0100] The structure of the centrifugal fan assembly 10 of the present invention can be used for both air supply centrifugal fan assembly 10a and air exhaust centrifugal fan assembly 10b, and will be described below as centrifugal fan assembly 10.

[0101] In the following description, the vertical direction is defined by the orientation of the top and bottom plates of the shell KT, i.e., the height direction of the shell KT. Furthermore, for ease of explanation, [the following will be used]. Figure 3The side containing the motor 103 (described later) is designated as the lower side, and the opposite side is designated as the upper side. However, the terms "upper" and "lower" do not limit the technical solution of the present invention, and can be reversed. That is, the centrifugal fan assembly 10 can be fixed to either the top plate or the bottom plate of the housing KT. The air handling equipment 1 can be installed either forwards or backwards according to actual installation needs. The centrifugal fan assembly 10 is fixed to the top or bottom plate of the housing KT via the motor bracket 104. Since it is fixed to the metal housing KT, the installation strength of the centrifugal fan assembly 10 can be ensured.

[0102] The centrifugal fan assembly 10 is disposed inside the housing KT and includes: an impeller 101; a volute 102 for housing the impeller 101; a motor 103 disposed below the volute 102 for driving the impeller 101; and a motor bracket 104 disposed below the motor 103 for supporting the motor 103.

[0103] The impeller 101 includes a partition plate 101a, blades 101b erected on the upper and lower surfaces of the partition plate 101a, and a shaft hole 101c through which the shaft 103a of the motor 103 passes.

[0104] like Figure 3 As shown, in the height direction of the housing KT, the volute 102 is located in the middle of the housing KT. That is, the volute 102 is located in the middle of the vertical direction of the housing KT, and is separated from both the upper and lower inner wall surfaces of the housing KT by a gap.

[0105] In this embodiment, the volute 102 has a volute base plate 102a and a volute cover 102b disposed on the volute base plate 102a. The volute cover 102b has a top plate portion opposite to the volute base plate 102a; and a side plate portion extending from the top plate portion toward the volute base plate 102a, with its front end connected to the volute base plate 102a. Air guide portions 102c for forming air inlets JF are respectively provided at approximately the center of the top plates of the volute base plate 102a and the volute cover 102b. A mounting portion is provided on the outer periphery of the volute base plate 102a, for example, connected to the housing KT (top or bottom plate) of the air handling equipment 1 by means of fasteners such as screws. The volute cover 102b and the volute base plate 102a cover the impeller 101 from both sides along the axial direction and together form an air duct. Furthermore, the side plate portion of the volute cover 102b has a ventilation port TF for air to be blown out. When the impeller 101 is working, the airflow is drawn into the air duct formed by the volute 102 from the air inlet JF on the lower side of the volute bottom plate 102a and the air inlet JF on the upper side of the top plate portion of the volute cover 102b, and after being pressurized by the rotation of the impeller 101, it is blown out from the ventilation port TF on the side plate portion of the volute cover 102b.

[0106] That is, the volute 102 is composed of a volute base plate 102a and a volute cover 102b. An air inlet JF for drawing in air is provided in the center of the volute base plate 102a and the volute cover 102b. The air inlet JF is surrounded by an air guide section 102c provided on the volute base plate 102a and the volute cover 102b. The air guide section 102c is formed by extending its inner diameter edge obliquely into the interior of the volute 102. The overall dimensions of the volute 102 are 200mm to 350mm, and the air velocity at the air inlet JF can be 1 m / s to 5 m / s.

[0107] The volute 102 is made of one of the following materials: foam material, resin material, or metal material, which allows the volute 102 to be easily manufactured. Additionally, a wire-passing groove (not shown) can be formed on the surface of the volute 102 to allow power lines, etc., to pass through.

[0108] like Figures 6 to 8 As shown, the motor bracket 104 includes: a storage section SN, which forms a storage space SP for storing the motor 103, wherein the impeller 101 of the centrifugal fan driven by the motor 103 is located on one side (upper side in the figure) of the motor 103 along the axial direction of the storage section SN; and a base section DZ, which is connected to the storage section SN on the other side (lower side in the figure) of the motor 103 along the axial direction of the motor 103. The base section DZ is a frustum-shaped cone that extends outward from the lower end of the storage section SN, and the outer diameter of the base section DZ gradually decreases from the lower side to the upper side. Specifically, the base portion DZ has an annular body DZ1 extending outward from the connection with the storage portion SN. At least one of the outer wall surfaces of the annular body DZ1 and the storage portion SN forms a guide surface DL. This guide surface DL is inclined relative to the axial direction of the motor 103 and guides the airflow from the annular body DZ1 toward one side of the axial direction of the motor 103. Specifically, it guides the airflow toward the air inlet JF of the volute 102, improving the airflow into the volute 102 and increasing the air volume. This ensures the overall airflow and improves the overall performance while meeting the requirements of miniaturization and thinning of the entire machine. It also reduces noise without increasing the fan speed. In a cross-section obtained by cutting with a plane passing through the axis of the motor 103, the guide surface DL is straight or curved (in the illustrated example, it is a curved shape concave toward the axis of the motor 103). Specifically, the outer wall surface of the storage section SN has a storage section guide surface DL1 that constitutes the guide surface DL, and the outer wall surface of the annular body DZ1 has a base section guide surface DL2 that constitutes the guide surface DL. The base section guide surface DL2 is smoothly connected to the storage section guide surface DL1. Furthermore, the storage section guide surface DL1 is formed on the other side of the storage section SN in the axial direction of the motor 103.

[0109] Here, the motor bracket 104 also includes a fixing post GD, which extends upward from the base portion DZ.

[0110] Furthermore, the storage section SN includes a cylindrical section SN1, which is coaxial with the base section DZ. A storage space SP is formed inside the cylindrical section SN1, and the motor 103 is housed within this storage space SP in a manner coaxial with the cylindrical section SN1. A portion of the storage space SP overlaps with the base section DZ in the axial direction (i.e., the height direction of the housing KT, which is vertical in the illustrated example) (that is, the storage space SP is formed to the point where it overlaps with the base section DZ in the axial direction). Specifically, the motor 103 includes: a motor body 103b fixed to the storage section SN; a rotating shaft 103a connected to the impeller 101; and a bearing section 103c on the other side of the motor body 103b in the axial direction, where the overlap refers to the bearing section 103c on the other side of the motor 103 being at least partially housed within the base section DZ. In this case, it is advantageous to reduce the overall height of the centrifugal fan assembly 10, thereby facilitating the miniaturization and thinning of the entire unit.

[0111] A circumferential portion of the cylindrical section SN1 is cut away to form a notch QK, which extends from the upper end of the receiving section SN towards its lower end. By providing the notch QK, the nameplate of the motor 103 is exposed, facilitating identification of the motor's type and model during maintenance. The notch QK also helps dissipate heat from the motor 103, improving its safety and ultimately enhancing the overall performance of the machine. Furthermore, the notch QK can also be used for heat dissipation.

[0112] Furthermore, the storage section SN includes a bottom section SN2, which is located at the lower end of the storage section SN, extending from the inner circumferential surface of the cylindrical section SN1 toward the center of the cylindrical section SN1, and has a through hole formed in the center. A rubber ring for the motor 103 is embedded in this through hole, and a bearing supporting the lower end of the rotating shaft 103a is fitted in the center of this rubber ring. The bottom section SN2 also has a stepped portion. Furthermore, a locking portion for engaging with the motor 103 can be formed on the bottom section SN2.

[0113] Furthermore, the storage section SN includes: a guide section SN11 extending upward from the base section DZ, with a concave outer peripheral surface; and a storage section body SN12 extending upward from the guide section SN11, the outer peripheral surface of the base section DZ being smoothly connected to the outer peripheral surface of the storage section body SN12 via the outer peripheral surface of the guide section SN11. Specifically, the cylindrical section SN1 has a guide section SN11 and a storage section body SN12, the curvature of the outer peripheral surface of the guide section SN11 being different from the curvature of the outer peripheral surface of the storage section body SN12. Preferably, the outer peripheral surface of the guide section SN11 is further outward than the outer peripheral surface of the storage section body SN12. Furthermore, in the axial direction of the base section DZ, if the height of the base section DZ is h1, the height of the guide section SN11 is h2, and the height of the storage section body SN12 is h3, preferably the following relationship is satisfied: h1 < h2 < h3.

[0114] Specifically, the receiving section SN has an inner bottom surface ND opposite to the end face of the motor body 103b. This inner bottom surface ND is the interface between the receiving section SN and the base section DZ. That is, when the height from the bottom surface of the base section DZ to the inner bottom surface ND of the receiving section SN is h1, the height of the guide section SN11 is h2, and the height of the receiving section body SN12 is h3, the following relationship is satisfied: h1 < h2 < h3. Therefore, the receiving section body SN12 of the receiving section SN is formed to be relatively long, making it easier to guide the airflow more smoothly toward the centrifugal fan side using the receiving section body SN12.

[0115] Furthermore, the base portion DZ is provided with a wire guide groove GX. The wire guide groove GX extends from the center side of the base portion DZ to the outer periphery of the base portion DZ. The circumferential position of the wire guide groove GX is approximately aligned with the notch QK of the storage portion SN, and the wire guide groove GX opens upwards and communicates with the notch QK of the storage portion SN. Moreover, it is preferable that a wire pressing structure is formed within the wire guide groove GX.

[0116] Furthermore, the fixing post GD includes a first fixing post GDA and a second fixing post GDB. The first fixing post GDA is located on the outer periphery of the base portion DZ, with its outer diameter gradually decreasing from the bottom to the top (in the illustrated example, it is formed as a stepped post, including a large-diameter portion and a small-diameter portion smaller than the large-diameter portion, but is not limited thereto), and multiple such posts are spaced apart circumferentially (preferably equally spaced). The second fixing post GDB is located on the inner periphery of the first fixing post GDA, and its inner periphery is connected to the outer surface of the storage portion SN; multiple such posts are also spaced apart circumferentially (preferably equally spaced). The upper end of the first fixing post GDA is connected to the volute 102 (volute base plate 102a) via a screw or similar connector. The lower end of the second fixing post GDB is connected to the base portion DZ, and its upper end is connected to the cover ZG (described later) via a screw or similar connector. Additionally, the base portion DZ also has a connecting portion LJ for connecting the motor bracket 104 to the housing KT. Specifically, the connecting part LJ is a recessed portion extending downward from the upper surface of the base part DZ, with a through hole at the bottom for screws and the like to pass through. The connecting part LJ is located radially between the first fixing post GDA and the second fixing post GDB, and multiple connecting parts LJ are provided at intervals in the circumferential direction (preferably at equal intervals).

[0117] The cover ZG is detachably fixed to the motor bracket 104, forming a motor mounting position between the motor bracket 104 and the cover ZG. The cover ZG is plate-shaped and has a main body ZT and a mounting part AZ. The main body ZT is annular, with a through hole in the center through which the rotating shaft 103a of the motor 103 passes. A rubber ring of the motor 103 is embedded in the through hole, and a bearing supporting the upper end of the rotating shaft 103a is fitted in the center of the rubber ring. The mounting part AZ protrudes from the outer periphery of the main body ZT and is provided in multiple circumferentially spaced corresponding to the second fixing post GDB for connection to the upper end of the second fixing post GDB by screws or other connecting parts.

[0118] When the motor 103 drives the impeller 101, the airflow is drawn in from the air inlet JF on the upper and lower surfaces of the volute 102, and after passing through the circumferential air duct formed by the volute 102, it is blown out radially from the ventilation port TF (air supply port SF or air exhaust port PF).

[0119] (Key features of the invention)

[0120] The following reference Figures 9 to 10 The main features of the air handling device 1 of the present invention will be described.

[0121] like Figure 9As shown, if the minimum distance from one end face (upper or lower surface) of the impeller 101 to the inner wall of the volute 102 opposite it in the height direction of the casing KT is a, and the maximum distance is b, then a and b satisfy the following relationship: a = k × b, where k is a constant, and 0.23 ≤ k ≤ 0.82. Preferably, 0.3 ≤ k ≤ 5, more preferably k = 0.44. By keeping k within a suitable range, the static pressure capacity of the fan can be guaranteed to meet the requirements, while reducing the leakage of airflow from the gap between the impeller 101 and the air inlet JF, which would cause turbulence at the air inlet JF. The smaller k is, the higher the fan speed needs to be to meet the static pressure capacity, which would correspondingly lead to problems such as excessive wind speed and high noise.

[0122] In this embodiment, the minimum distance a is the distance between the end of the air inlet JF closest to the impeller 101 and the upper or lower surface of the impeller 101.

[0123] If the minimum distance a is too large, there will be a risk of airflow leakage at low air volume (i.e., airflow overflows from the volute 102 to the air inlet JF, interfering with the air intake and affecting the air volume). On the other hand, if precise matching can be achieved to avoid scraping between the impeller 101 and the volute 102, the minimum distance a can be infinitely small.

[0124] Through extensive research and experimentation, the inventors of this application have concluded that by ensuring the height relationship between the inner wall of the volute 102 and the upper and lower surfaces of the impeller 101 as described above, a space for accommodating backflow can be formed inside the volute 102, preventing backflow from accumulating at the air inlet JF and affecting the air intake effect.

[0125] In particular, when 0mm < a ≤ 15mm, by ensuring that the inner wall surface of the volute 102 and the upper and lower surfaces of the impeller 101 satisfy this height relationship, it is possible to prevent the impeller 101 from colliding with the volute 102 during fan operation, reducing noise and ensuring smooth airflow. Furthermore, it prevents backflow from overflowing between the inner wall surface of the volute 102 and the impeller 101, thereby avoiding turbulence at the air inlet JF and improving the fan's static pressure capacity. Preferably, 2mm ≤ a ≤ 15mm, which further reliably prevents the impeller 101 from colliding with the volute 102 during fan operation.

[0126] Furthermore, if the diameter of the air inlet JF is c and the inner diameter of the impeller 101 is d, then c ≥ d. In this case, by ensuring the above relationship between the diameter of the air inlet JF and the inner diameter of the impeller 101, the air intake volume can be increased, and turbulence caused by the incoming airflow impacting the blades 101b of the impeller 101 can be avoided, resulting in smoother airflow into the volute 102. The inner diameter d of the impeller can satisfy 150mm ≤ d ≤ 250mm.

[0127] In this embodiment, for example, Figure 5 As shown, a guide section 102c for forming the lower air inlet JF is provided on the volute 102. The motor 103 is located at the guide section 102c of the volute 102. In the height direction of the housing KT, the upper surface of the motor 103 is higher than the uppermost end of the guide section 102c. At this time, the centrifugal fan assembly 10 can be miniaturized, and the air handling equipment 1 can be further miniaturized.

[0128] Specifically, such as Figure 5 As shown, in the height direction of the housing KT, the motor 103 and a part of the motor bracket 104 (specifically, a part of the storage body SN12) are located inside the volute 102, and there is a slight gap between the cover ZG above the motor bracket 104 and the partition 101a of the impeller 101 (a gap to avoid collision). At this time, it is possible to achieve miniaturization in the height direction of the housing KT while making the shaft 103a of the motor 103 as short as possible and ensuring stable operation.

[0129] In addition, the upper end (specifically, the main body SN12 of the storage part SN of the motor 103 in the motor bracket 104) is cylindrical, and the lower outer wall (specifically, the guide section SN11) is a smooth curved surface. Therefore, it is convenient for the upper end of the motor bracket 104 to be located inside the volute 102, with little impact on airflow, and the lower outer wall of the motor bracket 104 can also form an airflow passage with the air inlet JF, without affecting the airflow inflow.

[0130] However, the present invention is not limited to the above-described embodiments, and may also be implemented as follows. Figure 9 As shown, in the height direction of the housing KT, the motor 103 is positioned at the air inlet JF on the lower side of the volute 102. The upper surface of the motor 103 is flush with or lower than the uppermost part of the portion of the volute 102 that forms the lower air inlet JF. This facilitates the miniaturization of the centrifugal fan assembly 10, and further contributes to the miniaturization of the air handling equipment 1. Furthermore, it minimizes the obstruction of the lower air inlet JF by the motor bracket 104, ensuring smooth airflow into the air inlet JF, thereby ensuring the air volume of the centrifugal fan assembly 10 and guaranteeing fan performance.

[0131] In addition, such as Figure 10As shown, if, along the height direction of the housing KT, the side of the centrifugal fan assembly 10 with the motor 103 is designated as the lower side, and the side of the centrifugal fan assembly 10 without the motor 103 is designated as the upper side, and the shortest distance from the inner wall surface of the upper side of the housing KT to the upper surface of the volute 102 is H1, and the shortest distance from the inner wall surface of the lower side of the housing KT to the lower surface of the volute 102 is H2, then H1 and H2 satisfy the following relationship: 0.8 ≤ H1 / H2 ≤ 1.2. In this case, by ensuring that the shortest distance between the inner wall surface of the upper side of the housing KT to the upper surface of the volute 102 and the shortest distance between the inner wall surface of the lower side of the housing KT to the lower surface of the volute 102 satisfies the above relationship, it is beneficial to ensure the maximum air intake volume. Specifically, the height of H1 can ensure that the air intake volume on the H1 side is maximized, thereby maximizing the total air intake volume. On side H2, the airflow is significantly obstructed by the motor 103 and motor bracket 104. To ensure miniaturization while maintaining sufficient air intake on this side, H1 and H2 preferably satisfy the relationship 0.8 ≤ H1 / H2 ≤ 1.2. The height H of the housing KT can satisfy 150mm ≤ H ≤ 250mm.

[0132] Preferably, H1 and H2 satisfy the following relationship: H1 > H2. In this case, by making the shortest distance from the upper inner wall surface of the housing KT to the upper surface of the volute 102 greater than the shortest distance from the lower inner wall surface of the housing KT to the lower surface of the volute 102, it is more conducive to ensuring the maximum air intake. That is, when H1 > H2, it can ensure that as much air intake as possible is guaranteed on the H1 side. However, it is not limited to this; H1 < H2 can also be made, in which case the air intake on both sides of the baffle 101a of the impeller 101 is approximately the same, and the airflow is balanced.

[0133] Alternatively, H1+H2 can be made to be approximately the same height as the volute 102, or H1+H2 can be made slightly larger than the height of the volute 102, to ensure the air intake volume.

[0134] Furthermore, the lower outer wall of the motor bracket 104 (specifically, the guide section SN11) is formed as a curved surface, and the curvature of the curved surface of the lower outer wall of the motor bracket 104 is approximately the same as the curvature of the air guide section 102c. In this case, by making the curvature of the curved surface of the lower outer wall of the motor bracket 104 approximately the same as the curvature of the air guide section 102c, the two curved surfaces can be used to form an air intake flow path for air guidance, which is beneficial to improving the air intake volume on the motor 103 side of the centrifugal fan assembly 10, making the air intake volume on both sides as close to the same as possible. However, the present invention is not limited to this; the curvature of the lower outer wall of the motor bracket 104 (specifically, the guide section SN11) may also be greater than the curvature of the air guide section 102c. In this case, the installation stability of the motor bracket 104 can be improved while ensuring the air intake volume.

[0135] Furthermore, the diameter e of the bottommost surface of the motor bracket 104 (specifically, the base portion DZ) is larger than or equal to the diameter c of the air guide portion 102c. By making the diameter e of the bottommost surface of the motor bracket 104 larger than or equal to the diameter c of the air guide portion 102c, it is ensured that airflow is smoothly guided to the lower air inlet JF. Moreover, because the diameter of the bottommost surface of the motor bracket 104 is larger, the centrifugal fan assembly 10 is fixed to the housing KT via the motor bracket 104, resulting in good stability. Simultaneously, it facilitates the installation of a connection structure on the motor bracket 104 that mates with the volute 102, leading to excellent assemblability.

[0136] Furthermore, a vent TF (supply vent SF or exhaust vent PF) is provided on the shell KT, and a heat exchanger (total heat exchange core HX) is installed inside the shell KT. In the height direction of the shell KT, the centerline of the volute 102 is flush with the centerline of the heat exchanger, or the centerline of the volute 102 is flush with the centerline of the vent TF. In this case, because the centerline of the volute 102 is flush with the centerline of the heat exchanger, or the centerline of the volute 102 is flush with the centerline of the vent TF, the pressure loss inside the fan is minimized, and the airflow from the vent TF is smooth. Moreover, the low pressure loss helps improve the air supply effect, thereby ensuring the heat exchange efficiency of the heat exchanger.

[0137] Furthermore, according to the air handling equipment 1 of this embodiment, the centrifugal fan assembly 10 has good anti-vibration and noise reduction performance, and can prevent vibration noise from being transmitted to the outside of the housing KT.

[0138] (Modified Example)

[0139] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above embodiments.

[0140] (1) In the above embodiments, the air handling equipment 1 is a total heat exchange equipment, but it is not limited to this. It can also be a fresh air fan, a blower, a humidifier, a dehumidifier, an air purifier, etc. By applying the present invention to fresh air fans, blowers, humidifiers, dehumidifiers, air purifiers, etc., a space for accommodating backflow can also be formed inside the volute 102, preventing backflow from accumulating at the air inlet JF and affecting the air intake effect.

[0141] When the air handling equipment is a total heat exchanger, the total heat exchanger preferably has: a housing, in which an air supply path and an air exhaust path are formed; and a total heat exchange core, which is disposed in the housing and communicates with the air supply path and the air exhaust path, wherein centrifugal fan assemblies are respectively provided on the air supply path and the air exhaust path, wherein at least one centrifugal fan assembly is a centrifugal fan assembly as described in the above embodiment, and the centrifugal fan assembly is fixed to the top plate or bottom plate of the housing.

[0142] (2) The present invention can be applied to both the centrifugal fan assembly 10a for supplying air and the centrifugal fan assembly 10b for exhausting air, or it can be applied to only one of the centrifugal fan assembly 10a for supplying air and the centrifugal fan assembly 10b for exhausting air.

[0143] (3) The present invention can be applied to both the dimensional relationship between the upper surface of the impeller 101 and the upper inner wall of the volute 102 and the dimensional relationship between the lower surface of the impeller 101 and the lower lower wall of the volute 102, or it can be applied to only one of them.

[0144] (4) In the above embodiment, the volute 102 is composed of a volute base plate 102a and a volute cover 102b disposed on the volute base plate 102a, but is not limited thereto. The volute 102 may also be composed of an upper volute and a lower volute that are divided in the height direction and interlocked with each other, and an air inlet may be provided in the central part of both the upper volute and the lower volute.

[0145] (5) The structure of the main body SN12 of the storage section can also be that an opening is formed between adjacent second fixed columns GDB, that is, the storage section SN only has the guide section SN11 and the second fixed column GDB, which can improve the heat dissipation performance of the motor and guide the airflow to increase the air intake.

[0146] In the description of this invention, it should be understood that the terms "height", "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0147] While the structure and working principle of the present invention have been described above with reference to preferred embodiments, those skilled in the art should recognize that the above examples are merely illustrative and should not be construed as limiting the invention. Therefore, modifications and variations can be made to the invention within the spirit and scope of the claims, and all such modifications and variations will fall within the scope claimed by the claims.

Claims

1. An air handling unit, comprising: The housing; and the centrifugal fan assembly disposed inside the housing. The centrifugal fan assembly includes an impeller and a volute housing the impeller. In the height direction of the housing, the volute is located in the middle of the housing. Its features are, If, in the height direction of the housing, the minimum distance from one end face of the impeller to the inner wall of the volute opposite it is a, and the maximum distance is b, then a and b satisfy the following relationship: a = k × b, where k is a constant and 0.23 ≤ k ≤ 0.

82.

2. The air handling equipment as described in claim 1, characterized in that, 0mm<a≤15mm.

3. The air handling equipment as described in claim 1, characterized in that, The volute includes an air inlet. If the diameter of the air inlet is c and the inner diameter of the impeller is d, then c ≥ d.

4. The air handling equipment as described in claim 1, characterized in that, The centrifugal fan assembly also includes a motor that drives the impeller. In the height direction of the housing, the side of the centrifugal fan assembly with the motor is designated as the lower side, and the side of the centrifugal fan assembly without the motor is designated as the upper side. In the height direction of the housing, the volute includes a lower air inlet on the lower side. The motor is located at the lower air inlet of the volute, and the upper surface of the motor on the side of the lower air inlet is flush with or lower than the uppermost part of the volute that forms the lower air inlet.

5. The air handling equipment as described in claim 1, characterized in that, The centrifugal fan assembly also includes a motor that drives the impeller. In the height direction of the housing, the side of the centrifugal fan assembly with the motor is designated as the lower side, and the side of the centrifugal fan assembly without the motor is designated as the upper side. An air guide section is provided on the volute to form a lower air inlet. The motor is located at the air guide section of the volute, and the upper surface of the motor is higher than the uppermost end of the air guide section.

6. The air handling equipment as described in claim 1, characterized in that, The centrifugal fan assembly also includes a motor that drives the impeller. If, in the height direction of the housing, the side of the centrifugal fan assembly with the motor is designated as the lower side, and the side of the centrifugal fan assembly without the motor is designated as the upper side, and the shortest distance from the inner wall surface of the upper side of the housing to the upper surface of the volute is H1, and the shortest distance from the inner wall surface of the lower side of the housing to the lower surface of the volute is H2, then H1 and H2 satisfy the following relationship: 0.8≤H1 / H2≤1.

2.

7. The air handling equipment as described in claim 6, characterized in that, H1 and H2 satisfy the following relationship: H1 > H2.

8. The air handling equipment as described in claim 1, characterized in that, The centrifugal fan assembly further includes: a motor that drives the impeller and a motor bracket that supports the motor. In the height direction of the housing, the side of the centrifugal fan assembly with the motor is designated as the lower side, and the side of the centrifugal fan assembly without the motor is designated as the upper side. An air guide section is provided on the volute to form a lower air inlet. The lower outer wall of the motor bracket is formed as a curved surface. The curvature of the lower outer wall of the motor bracket is the same as the curvature of the air guide.

9. The air handling equipment as described in claim 8, characterized in that, The diameter of the bottom surface of the motor bracket is larger than or equal to the diameter of the air guide.

10. The air handling apparatus according to any one of claims 1 to 9, characterized in that, The air handling equipment is one of the following: fresh air unit, air supply unit, total heat exchange unit, humidifier, dehumidifier, and air purifier.

11. The air handling equipment as claimed in claim 1, characterized in that, Ventilation openings are provided on the housing. A heat exchanger is installed inside the housing. In the height direction of the housing, the centerline of the volute is flush with the centerline of the heat exchanger, or the centerline of the volute is flush with the centerline of the vent.

Images