Backpack blower

Abstract

The present application relates to a backpack blower, wherein the frame body (10) comprises a support member (10a) close to the side where the person carries it. When viewed from the back side of the support member (10a), the support member (10a) comprises a central support portion (1) and an edge support portions (2). The central axis (L1) of the central support portion (1) and the edge line of the edge support portions form a first virtual plane (S1) and a second virtual plane (S2), respectively. The first virtual plane (S1) and the second virtual plane (S2) extend obliquely from the center outward to form an inwardly recessed open cavity on the back side (S) of the support member (10a). When viewed from the side opposite to the back side (S) of the support member (10a), the support member (10a) comprises an operation component mounting portion (4) suitable for mounting and connecting an operation component, which at least comprises a drive motor. The mutually spaced central support portion (1) and edge support portions (2) form an intermittent multi-segment support on the back of the operation component mounting portion (4). This technical solution improves carrying comfort and the structural strength of the backpack frame.

Description

Backpack BlowerCross-Reference to Related Application

[0001] This application claims priority to Chinese Patent Application No. 202411666426.0, filed on November 20, 2024 before the China National Intellectual Property Administration, the disclosure of which is incorporated herein by reference in entirety.Technical Field

[0002] The present application relates to the field of garden blowers, in particular to a backpack blower.Background Art

[0003] Electric tools are more environmentally friendly than engine-driven tools and thus widely used. For the convenience of users to carry, backpack blowers are now mostly used. Users carry the equipment on their backs, and the body bears the weight of the equipment, reducing the force on the hands and relieving the fatigue of users.

[0004] However, backpack blowers generally have a large power and high current, resulting in a high temperature of the battery pack during discharge, and the overall structure of the backpack frame needs to be strengthened.Summary

[0005] The present invention aims to provide a backpack blower that improves carrying comfort and structural strength.

[0006] In view of this, a backpack blower provided in the present application comprises:

[0007] a frame body;

[0008] a blower component comprising a drive motor and a fan;

[0009] a battery pack adapted to supply power to the drive motor;

[0010] characterized in that the frame body comprises a support member close to the side where the person carries it;

[0011] when viewed from the back side of the support member, the support member comprises a central support portion and edge support portions spaced apart on both sides of the central support portion;

[0012] the central axis of the central support portion and the edge lines of the edge support portions form a first virtual plane and a second virtual plane, respectively, and the first virtual plane and the second virtual plane extend obliquely from the center outward to form an inwardly recessed open cavity on the back side of the support member;

[0013] when viewed from the side opposite to the back side of the support member, the support member comprises an operation component mounting portion suitable for mounting and connecting the blower component;

[0014] the mutually spaced central support portion and edge support portions form an intermittent multi-segment support on the back of the operation component mounting portion, wherein, at the back position of the operation component mounting portion, the spaced area between the central support portion and the edge support portions on both sides is recessed inward to form a low-lying portion.

[0015] Further, the central support portion extends downward to connect with the bottom of the frame body, and is connected with the edge support portions by the transversely extending bottom to form a "Ш" shape on the back of the operation component mounting portion.

[0016] Further, the central support portion, the edge support portions, and the bottom are integrally formed.

[0017] Further, the mutually spaced central support portion and edge support portions correspond to and support the front, middle, and rear positions of the operation component mounting portion.

[0018] Further, the side of the edge support portions facing the back side is inclined from the outside to the inside.

[0019] Further, at least one side of the edge support portions facing the back side is provided with a groove to form a shape with alternating protrusions and depressions on the side of the edge support portions facing the back side.

[0020] Further, the support member further comprises a heat dissipation port;

[0021] the open cavity communicates with the heat dissipation port, and the heat dissipation port is adapted to face and keep in communication with the heat dissipation surface of the battery pack provided with a ventilation port.

[0022] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0023] In the present application, a central support portion and edge support portions are provided on the support member close to the side where the person carries it, and an inwardly recessed open cavity is formed on the back side of the support member. That is, it can be understood that the edge support portions protrude outward, and the central support portion is recessed inward. The central support portion is at least partially located inside the plane formed by the outer edges of the edge support portions, forming a similar embracing design that caters to the curve of the human back. On the one hand, when the person carries out the operation, the carrying is more comfortable. On the other hand, the mutually spaced central support portion and edge support portions form an intermittent multi-segment support on the back of the operation component mounting portion, which plays a role in strengthening the structure of the support member, can more evenly distribute the force, and improve the stability and bearing capacity of the overall structure, so that the support member can bear a larger operation load without being easily deformed or damaged. At the same time, the spaced area between the central support portion and the edge support portions on both sides is recessed inward to form a low-lying portion, which can increase the bending resistance, compression resistance, and torsion resistance of the support member, and can reduce the use of materials while ensuring the structural strength, thereby reducing the weight of the entire support member.

[0024] Another backpack blower provided by the present application comprises:

[0025] a frame body;

[0026] a blower component comprising a drive motor and a fan;

[0027] a battery pack adapted to supply power to the drive motor;

[0028] characterized in that the frame body comprises a support member close to the side where the person carries it, a covering member connected to the support member, and a cover body movably hinged to the covering member;

[0029] when viewed from the back side of the support member, the support member comprises a heat dissipation port, and a central support portion and edge support portions on both sides of the central support portion;

[0030] the central axis of the central support portion and the edge lines of the edge support portions form a first virtual plane and a second virtual plane, respectively, and the first virtual plane and the second virtual plane extend obliquely from the center outward to form an inwardly recessed open cavity on the back side of the support member;

[0031] the open cavity is communicated with the heat dissipation port;

[0032] when viewed from the side opposite to the back side of the support member, the support member comprises a battery mounting portion suitable for mounting and connecting the battery pack;

[0033] the heat dissipation port is adapted to face and keep in communication with the heat dissipation surface of the battery pack provided with a ventilation port, wherein the cover body can rotate along the movable hinge connection with the covering member to close or open the battery mounting portion.

[0034] Further, when viewed from the back side of the support member, a plurality of wedge-shaped portions are respectively provided between the central support portion and the edge support portions on both sides, and the heat dissipation port is provided on the bottom surface of the wedge-shaped portion to be covered and shielded by the upper inclined surface of the wedge-shaped portion.

[0035] Further, one end of the wedge-shaped portion in the transverse direction extends to connect with the edge support portions, and the other end extends to be close to the central support portion and is open to communicate with the central area of the open cavity.

[0036] Further, a diversion channel is formed between the upper inclined surface of the wedge-shaped portion and the bottom surface of another adjacent wedge-shaped portion, and  the diversion channel communicates with the heat dissipation port .

[0037] Further, the back side of the support member is adapted to connect a shoulder strap assembly, the shoulder strap assembly comprises a connection portion and a shoulder strap;the connection portion is connected with the back side of the support member, and forms an air flow chamber together with the open cavity.

[0038] Further, the connection portion is made of a porous breathable fabric.

[0039] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0040] In the present application, a central support portion and edge support portions are provided on the support member close to the side where the person carries it, and an inwardly recessed open cavity is formed on the back side of the support member. That is, it can be understood that the edge support portions protrude outward, and the central support portion is recessed inward. The central support portion is at least partially located inside the plane formed by the outer edges of the edge support portions, forming a similar embracing design that caters to the curve of the human back. On the one hand, when the person carries out the operation, the carrying is more comfortable. On the other hand, the mutually spaced central support portion and edge support portions form an intermittent multi-segment support on the back of the operation component mounting portion, which plays a role in strengthening the structure of the support member. The battery pack is arranged in a cavity that can be opened or closed to protect the battery pack. At the same time, a good heat dissipation channel is provided for the battery pack through the heat dissipation port. Hot air can be quickly discharged through the heat dissipation port, and cold air can enter, forming effective convection, thereby reducing the working temperature of the battery pack.

[0041] Another backpack blower provided by the present application comprises:

[0042] a frame body;

[0043] a blower component comprising a drive motor and a fan;

[0044] a battery pack adapted to supply power to the drive motor;

[0045] characterized in that the frame body comprises a support member close to the side where the person carries it;

[0046] when viewed from the back side of the support member, the support member comprises a central support portion and edge support portions spaced apart on both sides of the central support portion;

[0047] the central axis of the central support portion and the edge lines of the edge support portions form a first virtual plane and a second virtual plane, respectively, and the first virtual plane and the second virtual plane extend obliquely from the center outward to form an inwardly recessed open cavity on the back side of the support member;

[0048] when viewed from the side opposite to the back side of the support member, the support member comprises an operation component mounting portion suitable for mounting and connecting the blower component, and at the back position of the operation component mounting portion, the spaced area between the central support portion and the edge support portions on both sides is recessed inward to form a low-lying portion;

[0049] a battery mounting portion suitable for detachably mounting and connecting the battery pack, the battery pack being adapted to supply power to the drive motor;

[0050] the battery mounting portion is located above the operation component mounting portion; wherein

[0051] the central axis of the battery pack in the vertical direction is closer to the back side than the central axis of the blower component in the vertical direction.

[0052] Further, the mutually spaced central support portion and edge support portions form an intermittent multi-segment support on the back of the operation component mounting portion.

[0053] Further, the support member further comprises a heat dissipation port;

[0054] the heat dissipation port is adapted to face and keep in communication with the heat dissipation surface of the battery pack provided with a ventilation port, and is communicated with the open cavity.

[0055] Compared with the prior art, the backpack blower provided in the present application also forms a similar embracing design close to the side where the person carries it, which caters to the curve of the human back. On the one hand, when the person carries out the operation, the carrying is more comfortable. On the other hand, the battery mounting portion is located above the operation component mounting portion to facilitate the disassembly and installation of the battery pack by personnel. The central axis of the battery pack is set to be closer to the back side, so that the center of gravity of the entire backpack frame is closer to the human back, thereby improving the stability and balance during carrying, and reducing fatigue and discomfort caused by center of gravity offset. In addition, the center of gravity of the battery pack closer to the back helps to distribute the weight more evenly on the human back, reducing local pressure and improving carrying comfort.Description of Drawings

[0056] In order to more clearly illustrate the specific implementation of the present disclosure or the technical solution in the prior art, the drawings required for the description of the specific implementation or prior art will be briefly introduced below. Obviously, the drawings in the following description are only some implementations of the present disclosure. For ordinary technicians in this field, other drawings may also be obtained based on these drawings without creative work.

[0057] Fig. 1: Schematic structural diagram of the backpack blower according to some embodiment of the present application;

[0058] Fig. 2: Exploded view of the structure of the backpack blower according to some embodiment of the present application;

[0059] Fig. 3: Exploded view of the structure of the backpack frame according to some embodiment of the present application;

[0060] Fig. 4: Structural schematic diagram of the support member viewed from the back side according to some embodiment of the present application;

[0061] Fig. 5: Schematic diagram of the first virtual plane S1 and the second virtual plane S2 according to some embodiment of the present application;

[0062] Fig. 6: Structural schematic diagram of the support member viewed from the side opposite to the back side according to some embodiment of the present application;

[0063] Fig. 7: Structural schematic diagram of the wedge-shaped portion of the support member according to some embodiment of the present application.Detailed Description of Embodiments

[0064] The technical solutions of the present application will be clearly and completely described below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present application.

[0065] In the present application, with reference to the backpack frame, "outer" refers to the direction away from the side where the person carries it and the frame body, and "inner" refers to the direction facing the area surrounded by the frame body.

[0066] Referring to Figs. 1, 2, and 3, a backpack frame 100 provided in the present application comprises a frame body 10, wherein:

[0067] The frame body 10 comprises a support member 10a close to the side where the person carries it, a covering member 10b connected to the support member 10a, and a cover body 10c movably hinged (e.g., pivotally connected) to the covering member 10b.

[0068] The covering member 10b corresponds to the operation component mounting portion 4 of the support member 10a, and the cover body 10c corresponds to the battery mounting portion 5 of the support member 10a. In the assembly operation, the assembled operation component is first positioned and connected to the operation component mounting portion 4, and then the covering member 10b is correspondingly connected and fixed to the support member 10a to cover and fix the operation component. The cover body 10c can rotate along the movable hinge connection with the covering member 10b to close or open the battery mounting portion 5.

[0069] Referring to Figs. 4 and 5, when viewed from the back side S of the support member 10a, the support member 10a comprises:

[0070] a central support portion 1 and edge support portions 2 spaced apart on both sides of the central support portion 1;

[0071] the central axis L1 of the central support portion 1 and the edge lines (L2, L3) of the edge support portions 2 form a first virtual plane S1 and a second virtual plane S2, respectively. The first virtual plane S1 and the second virtual plane S2 extend obliquely from the center outward to form an inwardly recessed open cavity on the back side S of the support member 10a.

[0072] Referring to Fig. 6, when viewed from the side opposite to the back side S of the support member 10a, the support member 10a comprises:

[0073] an operation component mounting portion 4 suitable for mounting and connecting an operation component, which at least comprises a drive motor;

[0074] the mutually spaced central support portion 1 and edge support portions 2 form an intermittent multi-segment support on the back of the operation component mounting portion 4.

[0075] In the present application, a central support portion 1 and edge support portions 2 are provided on the support member 10a close to the side where the person carries it, and an inwardly recessed open cavity is formed on the back side S of the support member 10a. That is, it can be understood that the edge support portions 2 protrude outward, and the central support portion 1 is recessed inward. The central support portion 1 is at least partially located inside the plane formed by the outer edges of the edge support portions 2, forming a similar embracing design that caters to the curve of the human back. On the one hand, when the person carries out the operation, the carrying is more comfortable. On the other hand, the mutually spaced central support portion 1 and edge support portions 2 form an intermittent multi-segment support on the back of the operation component mounting portion 4, which plays a role in strengthening the structure of the support member 10a.

[0076] Specifically, the multi-segment support structure formed by the spaced arrangement of the central support portion 1 and the edge support portions 2 can more evenly distribute the force, improve the stability and bearing capacity of the overall structure, so that the support member 10a can bear a larger operation load without being easily deformed or damaged.

[0077] Further, continuing to refer to Figs. 4 and 7, when viewed from the back side S of the support member 10a, part of the spaced area between the central support portion 1 and the edge support portions 2 on both sides is lower than the adjacent part, forming a relatively low-lying structure to form a shape with alternating protrusions and depressions on the back of the operation component mounting portion 4.

[0078] Specifically, at the back position of the operation component mounting portion 4, the spaced area between the central support portion 1 and the edge support portions 2 on both sides is recessed inward to form a low-lying portion 8. When viewed from one side of the edge support portions 2 to the opposite side of the edge support portions 2, the back of the operation component mounting portion 4 forms protrusion-recess-protrusion-recess-protrusion, and the corresponding structural members are edge support portions 2-low-lying portion 8-central support portion 1-low-lying portion 8-edge support portions 2.

[0079] In this way, the formed shape with alternating protrusions and depressions can increase the bending resistance, compression resistance, and torsion resistance of the support member 10a. Moreover, while ensuring the structural strength, the use of materials can be reduced, thereby reducing the weight of the entire support member 10a.

[0080] Continuing to refer to Fig. 4, the central support portion 1 extends downward to connect with the bottom 3 of the frame body 10, and is connected with the edge support portions 2 by the transversely extending bottom 3 to form a "Ш" shape on the back of the operation component mounting portion 4.

[0081] The connection mode of the central support portion 1 with the bottom 3 and the edge support portions 2 forms a stable structural frame. Similar to the support structure of a bridge, it can effectively bear the pressure from the operation component and various external forces, ensuring the stability and reliability of the entire system. In addition, the "Ш" shape helps to evenly distribute stress and avoid stress concentration.

[0082] Further, the central support portion 1, the edge support portions 2, and the bottom 3 are integrally formed. In this way, there are no splicing or connecting gaps between each part, thereby avoiding stress concentration and weak strength points that may occur at these connections, so that the entire structure can bear a larger load and external force, and is not prone to fracture or deformation.

[0083] In addition, it should be particularly noted that:

[0084] The mutually spaced central support portion 1 and edge support portions 2 correspond to and support the front, middle, and rear positions of the operation component mounting portion 4.

[0085] By providing support at multiple positions, the force received by the operation component mounting portion 4 can be more evenly distributed to each support portion, reducing local concentrated stress, thereby improving the stability and reliability of the overall structure. Moreover, when the operation component is in operation, vibration will inevitably be generated, and multiple support points can jointly absorb and disperse energy, reducing the vibration amplitude transmitted to the operation component and protecting the operation component from damage.

[0086] In addition, in order to make the back side S better fit the curve of the human back, the side of the edge support portions 2 facing the back side S is inclined from the outside to the inside.

[0087] Further, at least one side of the edge support portions 2 facing the back side S is provided with a groove to form a shape with alternating protrusions and depressions on the side of the edge support portions 2 facing the back side S, as shown in 2a and 2b in Fig. 4. In this way, similarly, the formed shape with alternating protrusions and depressions can increase the bending resistance, compression resistance, and torsion resistance of the edge support portions 2. Moreover, while ensuring the structural strength, the use of materials can be reduced, thereby further reducing the weight of the entire support member 10a.

[0088] Referring to Figs. 3, 6, and 7, when viewed from the back side S of the support member 10a, the support member 10a further comprises:

[0089] a heat dissipation port 6, which is communicated with the above-mentioned open cavity;

[0090] further referring to Fig. 6, when viewed from the side opposite to the back side S of the support member 10a, the support member 10a comprises:

[0091] a battery mounting portion 5 suitable for mounting and connecting the battery pack 200;

[0092] the heat dissipation port 6 is adapted to face and keep in communication with the heat dissipation surface of the battery pack 200 provided with a ventilation port.

[0093] The heat dissipation port 6 communicates with the open cavity, which can provide a good heat dissipation channel for the battery pack 200. Hot air can be quickly discharged through the heat dissipation port, and cold air can enter, forming effective convection, thereby reducing the working temperature of the battery pack 200.

[0094] Especially when applied to a backpack blower, the backpack blower generates high-speed airflow during operation. By setting an air cooling channel communicated with the main operation air duct, negative pressure can be formed in the air cooling channel, and the heat dissipation port 6 communicated therewith forms an air inlet, which can introduce external airflow into the battery pack through the heat dissipation port 6 and introduce it into the main operation air duct through the air cooling channel, further enhancing the heat dissipation effect of the battery pack. It can be understood that at this time, the heat dissipation port 6, the air duct of the battery pack itself, the air cooling channel, and the main operation air duct are mutually communicated.

[0095] Further, referring to Fig. 7, when viewed from the back side S of the support member 10a, a plurality of wedge-shaped portions 7 are respectively provided between the central support portion 1 and the edge support portions 2 on both sides, and the heat dissipation port 6 is provided on the bottom surface 7b of the wedge-shaped portion 7 to be covered and shielded by the upper inclined surface 7a of the wedge-shaped portion 7.

[0096] The upper inclined surface 7a of the wedge-shaped portion 7 can play a role in shielding and protecting the heat dissipation port 6, reducing the possibility of external objects directly entering the heat dissipation port, such as preventing dust, debris, etc., from entering.

[0097] Continuing to refer to Fig. 7, one end of the wedge-shaped portion 7 in the transverse direction extends to connect with the edge support portions 2, and the other end extends to be close to the central support portion 1 and is open to communicate with the central area of the open cavity. In this way, the heat dissipation port 6 can be better communicated with the open cavity, promoting air circulation and improving heat dissipation efficiency.

[0098] Continuing to refer to Fig. 7, a diversion channel is formed between the upper inclined surface 7a of the wedge-shaped portion 7 and the bottom surface 7b of another adjacent wedge-shaped portion 7, and the diversion channel communicates with the heat dissipation port 6. The formation of the diversion channel can more effectively guide the air flow into the heat dissipation port 6. When the air flow flows between the upper inclined surface 7a of the wedge-shaped portion 7 and the bottom surface 7b of the adjacent wedge-shaped portion 7, it will flow along the direction of the diversion channel, thereby increasing the air flow volume and air flow speed entering the heat dissipation port 6 and improving the heat dissipation efficiency.

[0099] Further, the back side S of the support member 10a is adapted to connect a shoulder strap assembly 20, the shoulder strap assembly 20 comprises a connection portion 20a and a shoulder strap 20b, the connection portion 20a is connected with the back side S of the support member 10a, and forms an air flow chamber together with the open cavity.

[0100] Specifically, the connection portion 20a is made of a porous breathable fabric.

[0101] Referring to Fig. 3, as described above, the support member 10a comprises:

[0102] an operation component mounting portion 4 suitable for mounting and connecting an operation component, which at least comprises a drive motor;

[0103] a battery mounting portion 5 suitable for detachably mounting and connecting a battery pack, and the battery pack is adapted to supply power to the drive motor;

[0104] the battery mounting portion 5 is located above the operation component mounting portion 4.

[0105] The battery mounting portion 5 is located above the operation component mounting portion 4 to avoid too low a center of gravity. Those skilled in the art should know that too low a center of gravity will cause the frame to be unbalanced left and right or front and rear when carried, making it difficult for the carrier to maintain a stable posture, which may affect the flexibility and safety of actions. In this way, the center of gravity of the entire frame is closer to the upper part of the human back, which is more stable when carried and reduces the imbalance caused by too low a center of gravity. Moreover, it is convenient for the installation and disassembly of the battery pack 200.

[0106] In addition, the present application also provides a backpack blower, which comprises:

[0107] the above-mentioned backpack frame 100; and

[0108] a blower component 300 comprising a drive motor and a fan;

[0109] a battery pack 200 adapted to supply power to the drive motor;

[0110] the blower component 300 is installed and configured on the operation component mounting portion 4, and the battery pack 200 is installed and configured on the battery mounting portion 5.

[0111] Further, the central axis of the battery pack 200 in the vertical direction is closer to the back side S than the central axis of the blower component in the vertical direction.

[0112] In this way, setting the central axis of the battery pack closer to the back side can make the center of gravity of the entire backpack frame closer to the human back, thereby improving the stability and balance during carrying and reducing fatigue and discomfort caused by center of gravity offset. In addition, the center of gravity of the battery pack closer to the back helps to distribute the weight more evenly on the human back, reducing local pressure and improving carrying comfort.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent substitutions for some or all of the technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1.A backpack blower, comprising:a frame body(10);a blower component(300) comprising a drive motor and a fan;a battery pack(200) adapted to supply power to the drive motor;characterized in that the frame body(10) comprises a support member(10a) close to the side where the person carries it;when viewed from the back side(S) of the support member(10a), the support member(10a) comprises a central support portion(1) and edge support portions(2) spaced apart on both sides of the central support portion(1);the central axis(L1) of the central support portion(1) and the edge lines(L2, L3) of the edge support portions(2) form a first virtual plane(S1) and a second virtual plane(S2), respectively, and the first virtual plane(S1) and the second virtual plane(S2) extend obliquely from the center outward to form an inwardly recessed open cavity on the back side(S) of the support member(10a);when viewed from the side opposite to the back side(S) of the support member(10a), the support member(10a) comprises an operation component mounting portion(4) suitable for mounting and connecting the blower component(300);the mutually spaced central support portion(1) and edge support portions(2) form an intermittent multi-segment support on the back of the operation component mounting portion(4), wherein, at the back position of the operation component mounting portion(4), the spaced area between the central support portion(1) and the edge support portions(2) on both sides is recessed inward to form a low-lying portion.2.The backpack blower according to claim 1, wherein the central support portion(1) extends downward to connect with the bottom(3) of the frame body(10), and is connected with the edge support portions(2) by the transversely extending bottom(3) to form a "Ш" shape on the back of the operation component mounting portion(4).3.The backpack blower according to claim 2, wherein the central support portion(1), the edge support portions(2), and the bottom(3) are integrally formed.4.The backpack blower according to claim 1, wherein the mutually spaced central support portion(1) and edge support portions(2) correspond to and support the front, middle, and rear positions of the operation component mounting portion(4).5.The backpack blower according to claim 1, wherein the side of the edge support portions(2) facing the back side(S) is inclined from the outside to the inside.6.The backpack blower according to claim 1 or 5, wherein at least one side of the edge support portions(2) facing the back side(S) is provided with a groove to form a shape with alternating protrusions and depressions on the side of the edge support portions(2) facing the back side(S).7.The backpack blower according to any one of claims 1 to 5, wherein the support member(10a) further comprises a heat dissipation port(6);the open cavity communicates with the heat dissipation port (6), and the heat dissipation port(6) is adapted to face and keep in communication with the heat dissipation surface of the battery pack(200) provided with a ventilation port.8.A backpack blower, comprising:a frame body(10);a blower component(300) comprising a drive motor and a fan;a battery pack(200) adapted to supply power to the drive motor;characterized in that the frame body(10) comprises a support member(10a) close to the side where the person carries it, a covering member(10b) connected to the support member(10a), and a cover body(10c) movably hinged to the covering member(10b);when viewed from the back side(S) of the support member(10a), the support member(10a) comprises a heat dissipation port(6), and a central support portion(1) and edge support portions(2) on both sides of the central support portion(1);the central axis(L1) of the central support portion(1) and the edge lines(L2, L3) of the edge support portions(2) form a first virtual plane(S1) and a second virtual plane(S2), respectively, and the first virtual plane(S1) and the second virtual plane(S2) extend obliquely from the center outward to form an inwardly recessed open cavity on the back side(S) of the support member(10a);the open cavity is communicated with the heat dissipation port(6);when viewed from the side opposite to the back side(S) of the support member(10a), the support member(10a) comprises a battery mounting portion(5) suitable for mounting and connecting the battery pack(200);the heat dissipation port(6) is adapted to face and keep in communication with the heat dissipation surface of the battery pack(200) provided with a ventilation port, wherein the cover body(10c) can rotate along the movable hinge connection with the covering member(10b) to close or open the battery mounting portion(5).9.The backpack blower according to claim 8, wherein when viewed from the back side(S) of the support member(10a), a plurality of wedge-shaped portions(7) are respectively provided between the central support portion(1) and the edge support portions(2) on both sides, and the heat dissipation port(6) is provided on the bottom surface(7b) of the wedge-shaped portion(7) to be covered and shielded by the upper inclined surface(7a) of the wedge-shaped portion(7).10.The backpack blower according to claim 9, wherein one end of the wedge-shaped portion(7) in the transverse direction extends to connect with the edge support portions(2), and the other end extends to be close to the central support portion(1) and is open to communicate with the central area of the open cavity.11.The backpack blower according to claim 10, wherein a diversion channel is formed between the upper inclined surface(7a) of the wedge-shaped portion(7) and the bottom(3) surface of another adjacent wedge-shaped portion(7), and the diversion channel communicates with the heat dissipation port (6).12.The backpack blower according to any one of claims 8 to 11, wherein the back side(S) of the support member(10a) is adapted to connect a shoulder strap assembly(20), the shoulder strap assembly(20) comprises a connection portion(20a) and a shoulder strap(20b);the connection portion(20a) is connected with the back side(S) of the support member(10a), and forms an air flow chamber together with the open cavity.13.The backpack blower according to claim 12, wherein the connection portion(20a) is made of a porous breathable fabric.14.A backpack blower, comprising:a frame body(10);a blower component(300) comprising a drive motor and a fan;a battery pack(200) adapted to supply power to the drive motor;characterized in that the frame body(10) comprises a support member(10a) close to the side where the person carries it;when viewed from the back side(S) of the support member(10a), the support member(10a) comprises a central support portion(1) and edge support portions(2) spaced apart on both sides of the central support portion(1);the central axis(L1) of the central support portion(1) and the edge lines(L2, L3) of the edge support portions(2) form a first virtual plane(S1) and a second virtual plane(S2), respectively, and the first virtual plane(S1) and the second virtual plane(S2) extend obliquely from the center outward to form an inwardly recessed open cavity on the back side(S) of the support member(10a);when viewed from the side opposite to the back side(S) of the support member(10a), the support member(10a) comprises an operation component mounting portion(4) suitable for mounting and connecting the blower component(300), and at the back position of the operation component mounting portion(4), the spaced area between the central support portion(1) and the edge support portions(2) on both sides is recessed inward to form a low-lying portion;a battery mounting portion(5) suitable for detachably mounting and connecting the battery pack(200), the battery pack(200) being adapted to supply power to the drive motor;the battery mounting portion(5) is located above the operation component mounting portion(4); whereinthe central axis(L1) of the battery pack(200) in the vertical direction is closer to the back side(S) than the central axis(L1) of the blower component(300) in the vertical direction.15.The backpack blower according to claim 14, wherein the mutually spaced central support portion(1) and edge support portions(2) form an intermittent multi-segment support on the back of the operation component mounting portion(4).16.The backpack blower according to claim 14 or 15, wherein the support member(10a) further comprises a heat dissipation port(6);the heat dissipation port(6) is adapted to face and keep in communication with the heat dissipation surface of the battery pack(200) provided with a ventilation port, and is communicated with the open cavity.

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