Cross-flow fan and crane

Abstract

The utility model relates to air conditioning technical field provides a crossflow fan and crane, wherein, crossflow fan includes crossflow fan and volute, volute includes volute portion and air duct portion, crossflow fan sets up in volute portion, and air duct portion is located volute portion's downstream position, and the end wall of air duct portion is provided with at least two pressure relief holes, and pressure relief hole communicates the internal space of air duct portion with volute's external space, and along crossflow fan's axis direction, and the end wall is located air duct portion's at least one end. Such setting, crossflow fan operation, forward airflow along air duct portion circulation. When the air quantity is bigger, the redundant airflow will gather to the end wall of air duct portion, and discharges through the pressure relief hole, avoids appearing the problem of backflow airflow and pressure fluctuation, thereby can avoid the problem of surge, solves the problem that the crane in relevant art adopts crossflow fan and exists surge.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to a cross-flow fan and a ceiling fan. Background Technology

[0002] The ceiling-mounted air conditioner is a core component of the air conditioning system. It draws in outside air through the air inlet using a built-in fan, pressurizes and accelerates it after being guided by the volute, then exchanges heat through the heat exchanger, and finally delivers the regulated air to the target space through the air outlet to achieve the functions of cooling, heating or ventilation, and maintain the temperature, humidity and air quality of the target space.

[0003] Currently, centrifugal fans are commonly used in ceiling-mounted air conditioners. However, centrifugal fans and their casings result in a larger vertical dimension of the ceiling-mounted air conditioner (the vertical dimension of the ceiling-mounted air conditioner is perpendicular to the axis of the centrifugal fan). Some related technologies use cross-flow fans instead of centrifugal fans. However, due to the lower outlet pressure and larger air volume of cross-flow fans, some backflow air will appear in the cross-flow fan duct. The backflow air and the continuously output positive airflow of the cross-flow fan will violently impact and disturb each other in the duct, forming unstable vortices and pressure fluctuations, which will then cause surge. Surge not only causes drastic fluctuations in the air volume of the ventilation system and reduces efficiency, but also causes mechanical vibration and abnormal noise in the cross-flow fan body and duct structure, seriously affecting the stable operation and service life of the equipment.

[0004] Therefore, how to solve the surge problem of gantry cranes using cross-flow fans in related technologies has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0005] This utility model provides a cross-flow fan and a pedestal-mounted fan to solve the surge defect in pedestal-mounted fans using cross-flow fans in related technologies.

[0006] This utility model provides a cross-flow fan, comprising: Cross-flow fan; The volute includes a volute section and an air duct section. The cross-flow fan is disposed in the volute section, and the air duct section is located downstream of the volute section. The end wall of the air duct section is provided with at least two pressure relief holes, which connect the internal space of the air duct section with the external space of the volute. Along the axial direction of the cross-flow fan, the end wall is located at at least one end of the air duct section.

[0007] With this configuration, when the cross-flow fan is running, the forward airflow flows along the duct section. When the air volume is large, excess airflow will gather towards the end wall of the duct section and be discharged through the pressure relief hole, avoiding backflow and pressure fluctuations. This prevents surge and solves the surge problem that exists in ceiling-mounted fans using cross-flow fans in related technologies.

[0008] According to the present invention, a cross-flow fan is provided with a pressure relief port on the end wall, and the volute further includes: A cover plate, adapted to cover the pressure relief port, wherein the cover plate is provided with at least two of the pressure relief holes.

[0009] This design facilitates the machining of the pressure relief hole and makes it easier to control its machining accuracy. It also allows for the use of different materials for the cover plate and the air duct section.

[0010] According to the present invention, a cross-flow fan is provided in which a pressure relief pipe extends from the pressure relief port of the air duct section, and the cover plate is snapped into the pressure relief pipe.

[0011] This design allows for a detachable connection of the cover plate, facilitating its removal and individual repair and maintenance.

[0012] According to the present invention, a cross-flow fan is provided, the cover plate comprising: The flexible portion is adapted to undergo elastic deformation, and the pressure relief hole is formed in the flexible portion; A rigid part is arranged around the periphery of the flexible part, and the rigid part is connected to the air duct part.

[0013] This design, with the central main area of ​​the cover plate made of elastic material and the edges made of rigid material, ensures that the central main area has a certain degree of elastic deformation capability while also ensuring the structural strength of the connection between the edges and the pressure relief pipe. When the air volume in the duct is large, excess airflow accumulates at the end wall, increasing the pressure in the pressure relief pipe. When this pressure increases, the flexible part of the cover plate undergoes elastic deformation. This deformation increases the opening area of ​​the pressure relief holes in the flexible part, thereby increasing the efficiency of excess airflow discharge.

[0014] According to the present invention, a cross-flow fan is provided, wherein a slit is formed on the periphery of the pressure relief hole, one end of the slit is connected to the pressure relief hole, and the other end of the slit extends in a direction away from the pressure relief hole.

[0015] This design, with its slits, further increases the deformation capacity around the pressure relief hole. The deformation of the flexible section and the change in the opening area of ​​the pressure relief hole will adaptively change based on the pressure conditions within the pressure relief pipe, effectively matching the system pressure of the crane.

[0016] According to the present invention, each pressure relief hole corresponds to at least two slits, and the slits are distributed at intervals along the circumference of the pressure relief hole.

[0017] This design further enhances the deformation capacity of the area around the pressure relief hole.

[0018] According to the present invention, a cross-flow fan is provided, wherein the pressure relief holes are provided in at least two sets, and the pressure relief holes in each set are distributed at intervals along the lateral direction of the cover plate, and the pressure relief holes in each set are distributed at intervals along the vertical direction of the cover plate. Each pressure relief hole corresponds to a pair of slits, and the axes of the slits corresponding to each set of pressure relief holes coincide.

[0019] This configuration enhances the cross-flow fan's ability to expel excess airflow, effectively preventing surge problems.

[0020] According to the present invention, the flexible part of the cross-flow fan is made of rubber, and the rigid part is made of plastic.

[0021] This configuration allows both flexible rubber and plastic to be easy to process and have low cost, which helps to reduce the cost of cross-flow fans and ceiling fans.

[0022] This utility model also provides a pedestal crane, including the cross-flow fan as described above.

[0023] With this configuration, the ceiling-mounted unit provided by this utility model has the advantages of low noise, stable air volume, stable operation, and long service life.

[0024] According to the present invention, a pedestal crane also includes: The outer casing contains the cross-flow fan, which is located inside the casing. The casing is provided with an air inlet grille. The air inlet side of the volute portion of the cross-flow fan corresponds to the air inlet grille. There is a gap between the end wall of the air duct portion and the side wall of the casing, forming an air venting cavity. The air venting cavity is connected to the grille hole of the air inlet grille.

[0025] With this configuration, when the airflow within the cross-flow fan's duct is high, excess airflow discharged through the pressure relief vent will flow through the air vent chamber to the air inlet grille, where it will be drawn back into the cross-flow fan. The air pressure inside the ceiling-mounted fan's casing will not fluctuate significantly.

[0026] This utility model provides a cross-flow fan, including a cross-flow fan and a volute. The volute includes a volute section and an air duct section, with the cross-flow fan disposed in the volute section. The air duct section is located downstream of the volute section, and its end wall has at least two pressure relief holes, connecting the internal space of the air duct section to the external space of the volute. Along the axial direction of the cross-flow fan, the end wall is located at at least one end of the air duct section. With this configuration, during operation, the forward airflow flows along the air duct section. When the air volume is large, excess airflow will accumulate on the end wall of the air duct section and be discharged through the pressure relief holes, avoiding backflow and pressure fluctuations, thus preventing surge and solving the surge problem existing in related technologies using cross-flow fans in ceiling-mounted fans.

[0027] Furthermore, the pedestal crane provided by this utility model, having the cross-flow fan as described above, also possesses the various advantages described above. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a structural schematic diagram of the air duct section of the suspended crane provided by this utility model.

[0030] Figure 2 This is a structural schematic diagram of the pressure relief pipe of the crane provided by this utility model.

[0031] Figure 3 This is a schematic diagram showing the relative positions of the cover plate and the outer shell of the crane provided by this utility model.

[0032] Figure 4 This is a structural schematic diagram of the cover plate provided by this utility model from one perspective.

[0033] Figure 5 This is a structural schematic diagram of the cover plate provided by this utility model from another perspective.

[0034] Figure label: 1. Crossflow fan; 2. Volute; 3. Air duct; 4. End wall; 5. Pressure relief hole; 6. Cover plate; 7. Pressure relief pipe; 8. Flexible part; 9. Rigid part; 10. Slit; 11. Outer shell; 12. Air inlet grille; 13. Air venting chamber; 14. Buckle; 15. Clip hole. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] The following is combined with Figures 1 to 5 This invention describes the cross-flow fan.

[0037] like Figures 1 to 5 As shown, the cross-flow fan provided in this embodiment of the present invention includes a cross-flow fan 1 and a volute.

[0038] Specifically, the volute includes a volute section 2 and an air duct section 3, with the cross-flow fan 1 disposed in the volute section 2.

[0039] The air duct section 3 is located downstream of the volute section 2. The end wall 4 of the air duct section 3 is provided with at least two pressure relief holes 5, which connect the internal space of the air duct section 3 with the external space of the volute. Along the axial direction of the cross-flow fan 1, the end wall 4 is located at at least one end of the air duct section 3.

[0040] With this configuration, when the cross-flow fan is running, the forward airflow flows along the duct section 3. When the air volume is large, the excess airflow will gather towards the end wall 4 of the duct section 3 and be discharged through the pressure relief hole 5, avoiding the problems of backflow and pressure fluctuations. This avoids the surge problem and solves the surge problem that exists in the related technology of the pedestal crane when using the cross-flow fan 1.

[0041] In this embodiment of the utility model, the end wall 4 is provided with a pressure relief port, and the volute also includes a cover plate 6, which is disposed at the pressure relief port and is used to cover the pressure relief port.

[0042] The cover plate 6 is provided with at least two through holes, which form the aforementioned pressure relief hole 5.

[0043] This facilitates the machining of the pressure relief hole and makes it easier to control the machining accuracy of the pressure relief hole 5. It also allows for the use of different materials for the cover plate 6 and the air duct section 3.

[0044] In this embodiment, a pressure relief pipe 7 is provided extending from the pressure relief port of the air duct section 3, as shown in the reference. Figure 2 The cover plate 6 is snapped into the pressure relief pipe 7. This allows for a detachable connection of the cover plate 6, and the structure is simple, facilitating the disassembly, repair, and maintenance of the cover plate 6.

[0045] In this embodiment of the invention, the cover plate 6 includes a flexible portion 8 and a rigid portion 9. The flexible portion 8 is capable of elastic deformation, and a pressure relief hole 5 is formed in the flexible portion 8. The rigid portion 9 is arranged around the periphery of the flexible portion 8, and the rigid portion 9 is connected to the flexible portion 8. The rigid portion 9 is connected to the air duct portion 3.

[0046] The cover plate 6 is made of elastic material in the central main area and rigid material at the edge, which can ensure that the central main area has a certain elastic deformation capacity and also ensure the structural strength of the connection between the edge and the pressure relief pipe 7.

[0047] When the air volume in the duct section 3 is large, excess airflow accumulates at the end wall 4, increasing the pressure in the pressure relief pipe 7. When this pressure acts on the cover plate 6, it causes the flexible part 8 of the cover plate 6 to undergo elastic deformation. When the flexible part 8 of the cover plate 6 undergoes elastic deformation, the opening area of ​​the pressure relief hole 5 of the flexible part 8 increases, thereby increasing the efficiency of excess airflow discharge.

[0048] For the snap-fit ​​connection structure between the cover plate 6 and the pressure relief pipe 7, a buckle 14 can be provided on the outer wall of the pressure relief pipe 7, and a snap hole 15 can be provided on the rigid part 9 of the cover plate 6. When the cover plate 6 seals the pressure relief port, the buckle 14 snaps into the snap hole 15.

[0049] In a further embodiment, a slit 10 is formed around the pressure relief hole 5. One end of the slit 10 is connected to the pressure relief hole 5, and the other end of the slit 10 extends away from the pressure relief hole 5. The slit 10 further increases the deformability of the area around the pressure relief hole 5. When excess airflow reaches a certain level and pressure reaches a certain level, the slit 10 will open, and a larger opening will be used for pressure relief.

[0050] In the entire air supply system of the pedestal crane, the resistance of the evaporator varies with the degree of water accumulation. The movement angles of the guide plates and the swashplates both affect the system pressure. Furthermore, the rotational speed of the cross-flow fan and the degree of clogging of the pedestal crane's air inlet grille also influence the system pressure. These effects are difficult to monitor. However, in this embodiment, the deformation of the flexible part 8 and the change in the opening area of ​​the pressure relief hole 5 adaptively change based on the pressure conditions within the pressure relief pipe 7, effectively matching the system pressure of the pedestal crane without requiring real-time monitoring.

[0051] In a specific embodiment, each pressure relief hole 5 corresponds to at least two slits 10, and the slits 10 are distributed at intervals along the circumference of the pressure relief hole 5, such as... Figure 4 and Figure 5 As shown, it can improve the deformation capacity of the five sides of the pressure relief hole.

[0052] In this embodiment, at least two sets of pressure relief holes 5 are provided, with each set of pressure relief holes 5 distributed at intervals along the lateral direction of the cover plate 6 and each set of pressure relief holes 5 distributed at intervals along the vertical direction of the cover plate 6.

[0053] The lateral direction and vertical direction of the cover plate 6 are both perpendicular to the axis of the cross-flow fan 1. The lateral direction of the cover plate 6 is parallel to the plane where the air inlet grille 12 is located, and the vertical direction of the cover plate 6 is perpendicular to the plane where the air inlet grille 12 is located.

[0054] Each pressure relief hole 5 corresponds to a pair of slits 10, and the axes of the slits 10 corresponding to each set of pressure relief holes 5 coincide, such as Figure 4 and Figure 5 As shown, this improves the cross-flow fan's ability to expel excess airflow, effectively preventing surge problems.

[0055] In some embodiments, adjacent sets of pressure relief holes 5 are staggered.

[0056] The pressure relief hole 5 can be circular, square, elliptical, or other shapes. In this embodiment, the pressure relief hole 5 is set to be circular.

[0057] The opening area of ​​each pressure relief hole 5, the distance between two adjacent pressure relief holes 5 in each group, and the distance between two adjacent pressure relief holes 5 in each group can all be determined through performance testing of the crane, and no specific limitations are made here.

[0058] In this embodiment, the flexible part 8 is made of flexible rubber, and the rigid part 9 is made of plastic. Both flexible rubber and plastic have the advantages of being easy to process and having low cost, which helps to reduce the cost of cross-flow fans and ceiling fans.

[0059] The thickness of the flexible part 8 can be 1 to 2 mm, and the thickness of the rigid part 9 can be 1.5 to 3 mm.

[0060] Specifically, the thickness of the flexible part 8 is 1.5 mm, and the thickness of the rigid part 9 is 2 mm.

[0061] On the other hand, this embodiment of the present invention also provides a pedestal-mounted fan, including the cross-flow fan provided in any of the above embodiments. The cross-flow fan provided in any of the above embodiments does not experience surge; therefore, the pedestal-mounted fan provided in this embodiment has the advantages of low noise, stable airflow, stable operation, and long service life. The derivation process of the beneficial effects of the pedestal-mounted fan in this embodiment is largely similar to the derivation process of the beneficial effects of the cross-flow fan described above, and therefore will not be repeated here.

[0062] In this embodiment, the pedestal crane also includes a housing 11, and a cross-flow fan is disposed inside the housing 11. The housing 11 is provided with an air inlet grille 12, and the air inlet side of the volute 2 of the cross-flow fan corresponds to the air inlet grille 12, so that the internal gas of the housing 11 can enter the housing 11 and then enter the cross-flow fan.

[0063] There is a gap between the end wall 4 of the air duct section 3 and the side wall of the outer casing 11, forming an air vent 13, as shown in the figure. Figure 3 The vent chamber 13 is connected to the grille opening of the air inlet grille 12. When the air volume in the duct section 3 of the cross-flow fan is large, the excess airflow discharged through the pressure relief hole 5 will flow through the vent chamber 13 to the air inlet grille 12, and then be drawn back into the cross-flow fan. The air pressure inside the outer casing 11 of the pedestal fan will not fluctuate significantly.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cross-flow fan characterized by, include: Cross-flow fan (1); The volute includes a volute section (2) and an air duct section (3). The cross-flow fan (1) is disposed in the volute section (2). The air duct section (3) is located downstream of the volute section (2). The end wall (4) of the air duct section (3) is provided with at least two pressure relief holes (5). The pressure relief holes (5) connect the internal space of the air duct section (3) with the external space of the volute. Along the axial direction of the cross-flow fan (1), the end wall (4) is located at at least one end of the air duct section (3).

2. The cross-flow fan according to claim 1, characterized by The end wall (4) is provided with a pressure relief port, and the volute also includes: A cover plate (6) is adapted to cover the pressure relief port, and at least two pressure relief holes (5) are provided on the cover plate (6).

3. The cross-flow fan according to claim 2, characterized in that, The pressure relief pipe (7) extends from the pressure relief port of the air duct section (3), and the cover plate (6) is engaged with the pressure relief pipe (7).

4. The cross-flow fan according to claim 2, characterized in that, The cover plate (6) includes: The flexible part (8) is adapted to undergo elastic deformation, and the pressure relief hole (5) is formed in the flexible part (8). A rigid part (9) is arranged around the periphery of the flexible part (8), and the rigid part (9) is connected to the air duct part (3).

5. The cross-flow fan according to claim 4, characterized in that, A slit (10) is formed on the periphery of the pressure relief hole (5). One end of the slit (10) is connected to the pressure relief hole (5), and the other end of the slit (10) extends away from the pressure relief hole (5).

6. The cross-flow fan according to claim 5, characterized in that, Each of the pressure relief holes (5) corresponds to at least two of the cuts (10), and the cuts (10) are distributed circumferentially along the pressure relief holes (5).

7. The cross-flow fan according to claim 5, characterized in that, The pressure relief holes (5) are provided in at least two sets, and the pressure relief holes (5) in each set are distributed at intervals along the lateral direction of the cover plate (6), and the pressure relief holes (5) in each set are distributed at intervals along the vertical direction of the cover plate (6); Each of the pressure relief holes (5) corresponds to a pair of slits (10), and the axes of the slits (10) corresponding to each set of pressure relief holes (5) coincide.

8. The cross-flow fan according to any one of claims 4-7, characterized in that, The flexible part (8) is made of rubber, and the rigid part (9) is made of plastic.

9. A type of crane, characterized in that, Including the cross-flow fan as described in any one of claims 1 to 8.

10. The crane according to claim 9, characterized in that, Also includes: The outer casing (11) is provided with an air inlet grille (12). The air inlet side of the volute (2) of the cross-flow fan is corresponding to the air inlet grille (12). There is a gap between the end wall (4) of the air duct (3) and the side wall of the outer casing (11) to form an air venting chamber (13). The air venting chamber (13) is connected to the grille hole of the air inlet grille (12).

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