Blowing and sucking machine

Abstract

The invention provides a single-tube blowing and sucking machine, which comprises an airflow generating device, a blowing and sucking device, a blowing and sucking device, a blowing and sucking device, a blowing and sucking device, a blowing and sucking device and a blowing and sucking device, and is characterized in that the airflow generating device comprises a motor and a fan driven by the motor to rotate and generate airflow; the blowing and sucking pipe is provided with a pipe opening communicated with the outside and used for air inlet or air outlet, and a first end close to the airflow generating device is arranged; the blowing and sucking machine further comprises a machine body at least partially covering the periphery of the airflow generating device, the machine body comprises a holding part for an operator to hold and a main machine shell connected with the holding part, and the airflow generating device rotates relative to the main machine shell and / or the holding part. Therefore, the blowing and sucking machine can be switched between the blowing mode and the sucking mode. According to the blowing and sucking switching device, blowing and sucking share one pipe, blowing and sucking switching does not need to be replaced by disassembling the blowing and sucking pipes, the blowing and sucking switching mode is simple in action, the use comfort of a user is improved, and the use efficiency of the user is improved.

Description

[0001] This application is a divisional application of the Chinese invention patent application with a priority date of December 12, 2017, priority application number CN201711316309.1, and an application date of December 12, 2018, with the invention name “Blowing and Suction Machine” and application number CN201811519242.6. Technical Field

[0002] The invention relates to outdoor gardening electric tools, in particular to a single-tube blowing and suction machine. Background Art

[0003] In some existing blowing and suction machines, the blowing and suction switching is realized by removing the blowing and suction pipes respectively and then assembling them interchangeably. In this solution, the blowing and suction pipes need to be disassembled during use by the user, which has poor operability, poor human-machine interaction, and inconvenient use. Summary of the invention

[0004] In view of the state of the prior art, an object of the present invention is to provide a single-tube blowing-suction machine, which does not need to be disassembled when switching between blowing and suction, and has simple blowing and suction switching operations and small air flow loss.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the present disclosure is: a blowing and sucking machine, which has a blowing mode and a suction mode, and the blowing and sucking machine includes: a flow generating device, including a motor, a fan driven by the motor to rotate and generate an airflow, and a volute surrounding the fan, the motor includes a motor body, a motor output shaft extending from the motor body, the volute includes a connected air inlet and an air outlet, the air inlet includes an air inlet that can be connected to the outside world in the blowing mode, and the air outlet includes an air outlet for the foreign matter sucked in in the suction mode to flow out; a blowing and sucking pipe, which is connected to the outside world for air intake or air outlet the volute and the blowing and suction pipe are operable to move relative to each other so that the blowing and suction machine can switch between the blowing mode and the suction mode, and the rotation axis of the motor output shaft and the rotation axis of the fan basically coincide with each other. In the blowing mode, the extension direction of the motor output shaft is basically consistent with the extension direction of the air inlet part, and the extension direction of the air outlet part is perpendicular to the extension direction of the motor output shaft; in the suction mode, the extension direction of the motor output shaft is basically consistent with the extension direction of the blowing and suction pipe, and the extension direction of the air outlet part is perpendicular to the extension direction of the motor output shaft.

[0006] In one embodiment, the fan includes an air inlet side perpendicular to the motor output shaft and an air outlet side parallel to the motor output shaft, and in the blowing mode, the air inlet is located directly above the air inlet side.

[0007] In one embodiment, in the blowing mode, the extension direction of the blowing and suction pipe is substantially consistent with the extension direction of the air outlet portion.

[0008] In one embodiment, in the suction mode, the pipe opening is located directly in front of the air inlet, and the rotation axis of the motor output shaft, the rotation axis of the fan and the central axis of the blowing and suction pipe are substantially coincident.

[0009] In one embodiment, in the suction mode, the air outlet is located directly below the air outlet side of the fan.

[0010] In one embodiment, a cross-sectional area of ​​the air inlet in a direction perpendicular to the air inlet direction is greater than a cross-sectional area of ​​the air outlet in a direction perpendicular to the air outlet direction.

[0011] In one embodiment, the blower-suction machine includes a body that is at least partially shielded by the periphery of the airflow generating device, the body includes a grip for an operator to hold and a main body shell connected to the grip, the main body shell is provided with an opening connected to the outside, in the blowing mode, the opening is fluidly connected to the air inlet, and the volute is rotatably installed in the main body shell through a rotating axis A.

[0012] In one embodiment, the air outlet and the air inlet of the volute are staggered around the rotation axis A by 90 degrees.

[0013] In one embodiment, in the blowing mode, the motor body is located below the rotating axis A; in the suction mode, the motor output shaft and the rotating axis A are located at approximately the same height.

[0014] In one embodiment, the blowing-suction machine includes a collecting device detachably connected to the air outlet portion, for collecting foreign matter flowing inward from the pipe opening of the blowing-suction pipe, and the collecting device is located below the machine body.

[0015] In one embodiment, the blower-suction machine further includes a blowing-suction conversion mechanism, which can operably drive the volute to rotate around the rotation axis A relative to the main housing to drive the blower-suction machine to be in the blowing position in the blowing mode or the suction position in the suction mode.

[0016] In one embodiment, the blowing and sucking conversion mechanism also includes a lever, the blowing and sucking tube includes a first end close to the airflow generating device, and the lever is operable to drive the first end of the blowing and sucking tube to move between a first position close to the airflow generating device and a second position away from the airflow generating device.

[0017] In one embodiment, the blowing and suction conversion mechanism also includes an operating component that can be pivotally mounted to the fuselage, and when the blowing and suction tube is in the second position, the operating component can operably drive the airflow generating device to rotate to the blowing position or the suction position.

[0018] In one embodiment, the blowing and suction tube is pivotally arranged relative to the holding portion with a rotation axis A', and the blowing and suction tube can rotate between a blowing position and a suction position.

[0019] To achieve the above purpose, the technical solution adopted in the embodiment of the present disclosure is: a blowing and suction machine having a blowing mode and a suction mode, the blowing and suction machine comprising:

[0020] a body, including a grip portion for an operator to hold;

[0021] An airflow generating device is connected to the fuselage and includes a motor, a fan driven by the motor output shaft to rotate and generate airflow, and a volute surrounding the fan, the volute includes an air inlet and an air outlet connected to the outside, the air inlet includes an air inlet that can be connected to the outside in a blowing mode, the air outlet includes an air outlet that can guide foreign matter sucked into the airflow in a suction mode, the fan includes an air inlet side perpendicular to the motor output shaft and an air outlet side parallel to the motor output shaft, in the blowing mode, the air inlet to the air inlet side forms an air inlet channel, and the air outlet side to the pipe port forms an air outlet channel;

[0022] The blowing and suction pipe has a pipe opening connected to the outside and used for air intake or air exhaust. In the air suction mode, the pipe opening to the air inlet side forms a dust suction channel, and the air outlet side to the air outlet forms a dust exhaust channel;

[0023] The volute is pivotally arranged relative to the blowing and suction pipe, and the volute can at least rotate between a blowing position in a blowing mode and a suction position in a suction mode, so that the blower-suction machine switches between the blowing mode and the suction mode.

[0024] When the blower-vacuum machine is in the blowing mode, the extension direction of the air inlet channel is configured to be consistent with the extension direction of the motor output shaft or offset within a range of 20 degrees clockwise or counterclockwise from the extension direction of the motor output shaft;

[0025] The extension direction of the air outlet channel is configured to be perpendicular to the extension direction of the motor output shaft or offset within a range of 20 degrees clockwise or counterclockwise from the direction perpendicular to the extension direction of the motor output shaft;

[0026] When the blower-suction machine is in the suction mode, the extension direction of the dust suction channel is configured to be substantially consistent with the extension direction of the motor output shaft or offset within a range of 20 degrees clockwise or counterclockwise from the extension direction of the motor output shaft;

[0027] The extension direction of the dust outlet passage is configured to be perpendicular to the extension direction of the motor output shaft or to be offset within a range of 20 degrees clockwise or counterclockwise from the direction perpendicular to the extension direction of the motor output shaft.

[0028] In one embodiment, when the blower-suction machine is in the blowing mode, the extension direction of the air inlet channel can be configured to be consistent with the extension direction of the motor output shaft, and the air outlet channel is configured to be consistent with the direction perpendicular to the extension direction of the motor output shaft or to be offset counterclockwise or clockwise within a range of 20 degrees from the direction perpendicular to the extension direction of the motor output shaft.

[0029] In one embodiment, when the blower-suction machine is in the blowing mode, the extension direction of the air inlet channel can be configured to be within a 20-degree clockwise offset range from the extension direction of the motor output shaft, and the air outlet channel can be configured to be consistent with a direction perpendicular to the extension direction of the motor output shaft or to be within a 20-degree clockwise offset range from a direction perpendicular to the extension direction of the motor output shaft.

[0030] In one embodiment, when the blower-suction machine is in the blowing mode, the extension direction of the air inlet channel can be configured to be offset within 20 degrees counterclockwise from the extension direction of the motor output shaft, and the air outlet channel can be configured to be consistent with the direction perpendicular to the extension direction of the motor output shaft or offset within 20 degrees clockwise or counterclockwise from the direction perpendicular to the extension direction of the motor output shaft.

[0031] In one embodiment, when the blower-suction machine is in the suction mode, the extension direction of the dust suction channel is configured to be basically consistent with the extension direction of the motor output shaft, and the dust exhaust channel is configured to be consistent with the direction perpendicular to the extension direction of the motor output shaft or to be offset within 20 degrees clockwise or counterclockwise from the direction perpendicular to the extension direction of the motor output shaft.

[0032] In one embodiment, when the blower-suction machine is in the suction mode, the extension direction of the dust suction channel is configured to be within a 20-degree clockwise offset range from the extension direction of the motor output shaft, and the dust exhaust channel is configured to be consistent with a direction perpendicular to the extension direction of the motor output shaft or to be within a 20-degree clockwise offset range from a direction perpendicular to the extension direction of the motor output shaft.

[0033] In one embodiment, when the blower-suction machine is in the suction mode, the extension direction of the dust suction channel is configured to be offset within 20 degrees counterclockwise from the extension direction of the motor output shaft, and the dust exhaust channel is configured to be consistent with the direction perpendicular to the extension direction of the motor output shaft or offset within 20 degrees clockwise or counterclockwise from the direction perpendicular to the extension direction of the motor output shaft.

[0034] To achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the present disclosure is: a blowing and suction machine having a blowing mode and a suction mode, the blowing and suction machine comprising:

[0035] a body, including a grip portion for an operator to hold;

[0036] an airflow generating device connected to the fuselage, the airflow generating device comprising a motor, a fan driven by an output shaft of the motor to rotate and generate airflow, and a volute surrounding the fan, the volute comprising an air inlet and an air outlet communicating with the outside;

[0037] A blowing and suction tube, having a tube opening connected to the outside for air intake or air exhaust;

[0038] The volute is pivotally arranged relative to the holding portion and can rotate at least between a blowing position in a blowing mode and a suction position in a suction mode. When the volute rotates to the blowing position, air flows from the air inlet into the inner cavity of the volute and flows from the air outlet of the volute into the blowing and suction pipe; when the volute rotates to the suction position, air flows into the volute from the pipe opening and flows out from the air outlet.

[0039] In one embodiment, the gripping portion extends longitudinally along a first axis, the blowing and suction tube extends longitudinally along a second axis, and when the volute rotates to switch between the blowing mode and the suction mode, the angle formed by the first axis and the second axis remains unchanged.

[0040] In one embodiment, the blowing and suction pipe is a single-cavity air duct, and when the blowing and suction machine is in a blowing mode or a suction mode, the extension direction of the blowing and suction pipe remains unchanged.

[0041] In one embodiment, the air inlet portion includes an air inlet that can be connected to the outside in the blowing mode, and the air outlet portion includes an air outlet that can allow the inhaled foreign matter to flow out in the suction mode;

[0042] The fan includes an air inlet side perpendicular to the motor output shaft and an air outlet side parallel to the motor output shaft. In the blowing mode, the air inlet is located directly above the air inlet side, and the air outlet is located in front of the air outlet side; in the suction mode, the air inlet is located in front of the air inlet side, and the air outlet is located directly below the air outlet side.

[0043] In one embodiment, the airflow generating device is an independent integral structure, and when the blower-suction machine switches between a blowing mode and a suction mode, the independent integral structure can rotate as a whole relative to the gripping portion.

[0044] In one embodiment, the blowing-suction machine further includes a blowing-suction conversion mechanism, which is operable to drive the airflow generating device to pivot around the rotation axis A relative to the holding portion.

[0045] In one embodiment, the blowing and suction conversion mechanism includes a lever, and the blowing and suction pipe includes a first end close to the airflow generating device.

[0046] When the blower-suction machine switches from the suction mode to the blowing mode, the lever controls the first end of the blower-suction tube to be separated from the air inlet portion. When the blower-suction machine switches from the blowing mode to the suction mode, the lever controls the first end of the blower-suction tube to be separated from the air outlet portion.

[0047] In one embodiment, the blowing-suction conversion mechanism further includes an operating component that can be pivotally mounted to the fuselage, and the operating component can be operably driven to rotate the airflow generating device to the blowing position or the suction position.

[0048] In one embodiment, the fuselage includes a main body shell connected to the grip portion, the main body shell is provided with a fuselage air inlet portion and a blowing and suction pipe connecting portion for installing the blowing and suction pipe, and the fuselage air inlet portion is located below the grip portion.

[0049] To achieve the above purpose, the technical solution adopted in the embodiment of the present disclosure is: a blowing and suction machine having a blowing mode and a suction mode, the blowing and suction machine comprising:

[0050] A body, the body comprising a grip portion and a host housing connected to the grip portion, the host housing being provided with an opening communicating with the outside;

[0051] an airflow generating device connected to the main body housing, the airflow generating device comprising a motor, a fan driven by an output shaft of the motor to rotate and generate airflow, and a volute surrounding the fan, the volute comprising an air inlet and an air outlet in fluid communication with the opening;

[0052] A blowing and suction tube, having a tube opening connected to the outside for air intake or air exhaust;

[0053] The volute is pivotally arranged relative to the main body shell and can rotate at least between a blowing position in a blowing mode and a suction position in a suction mode. When the volute rotates to the blowing position, airflow flows into the inner cavity of the volute from the opening, and flows from the air outlet of the volute into the blowing and suction pipe; when the volute rotates to the suction position, airflow enters the inner cavity of the volute from the pipe mouth, and flows out from the air outlet.

[0054] In one embodiment, the grip portion and the host housing are integrally formed.

[0055] In one embodiment, the main body shell is provided with a front opening and a rear opening in the direction in which the blowing and suction tube extends, and the airflow generating device at least partially extends backward and is exposed to the outside of the rear opening.

[0056] In one embodiment, the blower-suction machine comprises a collecting device detachably connected to the air outlet portion, and the collecting device is at least partially located directly below the air outlet portion.

[0057] To achieve the above-mentioned objectives, the technical solution adopted in the embodiment of the present disclosure is: a single-tube blowing and sucking machine, comprising: a fuselage; an airflow generating device for generating an airflow, which is connected to the fuselage; a collecting device for collecting debris; and a blowing and sucking pipe, which is connected to the fuselage, the airflow generating device having an air inlet and an air outlet; the airflow generating device can be rotatably mounted to the fuselage, and the single-tube blowing and sucking machine can be switched between a suction mode and a blowing mode by rotating the airflow generating device relative to the fuselage, in which the air inlet of the airflow generating device is fluidly connected to the first end of the blowing and sucking pipe, and the air outlet of the airflow generating device is fluidly connected to the connecting interface of the collecting device; in the blowing mode, the air outlet of the airflow generating device is fluidly connected to the first end of the blowing and sucking pipe.

[0058] In one embodiment, the cross-sectional area of ​​the air inlet passage of the air inlet portion in a direction perpendicular to its air inlet direction is greater than the cross-sectional area of ​​the air outlet passage of the air outlet portion in a direction perpendicular to its air outlet direction.

[0059] In one embodiment, the blowing and suction pipe is a straight pipe, and a second end of the blowing and suction pipe is formed with an inclined opening inclined relative to an extending direction of the blowing and suction pipe.

[0060] In one embodiment, the fuselage further comprises a fuselage air inlet, and in the blowing mode, the air inlet of the air flow generating device is fluidically connected to the fuselage air inlet.

[0061] In one of the embodiments, in the suction mode, the air inlet of the airflow generating device is directly connected to the first end of the blowing and suction pipe, and the air outlet of the airflow generating device is directly connected to the connecting interface of the collecting device; in the blowing mode, the air outlet of the airflow generating device is directly connected to the first end of the blowing and suction pipe, and the air inlet of the airflow generating device is directly connected to the air inlet of the fuselage.

[0062] In one embodiment, the airflow generating device includes: a motor; a fan driven by the motor; and a volute surrounding the fan, wherein the volute includes an air inlet and an air outlet of the airflow generating device.

[0063] In one embodiment, the single-tube blowing-suction machine further includes a rotation driving unit for driving the volute to rotate, wherein the rotation driving unit is connected to the volute and exposed from the machine body.

[0064] In one embodiment, in the suction mode, the air inlet portion is sleeved on the first end of the blowing and suction tube from the outer periphery of the first end of the blowing and suction tube.

[0065] In one embodiment, in the blowing mode, the air outlet portion is connected to the first end of the blowing and suction pipe through a slot formed in the air outlet portion.

[0066] In one embodiment, the air outlet portion includes an inner tube, an outer fixing portion, and a slot defined between the inner tube and the outer fixing portion. In the blowing mode, the peripheral wall of the first end of the blowing and suction pipe is snapped into the slot.

[0067] In one embodiment, the single-tube blowing and suction machine further comprises a lever, wherein the lever is pivotally mounted to the machine body at a middle position thereof, a first end of the lever is pivotally connected to the blowing and suction tube, and a second end of the lever is exposed from the machine body.

[0068] The lever is rotated relative to the body by moving the second end of the lever, and the first end of the lever drives the blowing and suction pipe to move closer to and away from the airflow generating device.

[0069] In one embodiment, the single-tube blowing and suction machine also includes a linkage device for linking the rotation of the airflow generating device and the axial movement of the blowing and suction tube toward and away from the airflow generating device, and the linkage device includes a crank-connecting rod mechanism and a grooved wheel mechanism.

[0070] In one embodiment, the crank-connecting rod mechanism converts the continuous rotation into the axial movement of the blowing and suction pipe, and the grooved wheel mechanism converts the continuous rotation into the intermittent rotation of the airflow generating device relative to the fuselage.

[0071] In one embodiment, the linkage device includes a connecting rod, a turntable, a convex rod and a linkage member, the first end of the connecting rod is connected to the blowing and suction tube, the second end of the connecting rod is connected to the eccentric position of the turntable, the turntable is rotatably mounted to the fuselage and includes an arc surface, the convex rod is fixed to the turntable, the linkage member is fixed to the airflow generating device, and the linkage member includes a first sliding surface for cooperating with the arc surface, a second sliding surface and a groove for engaging with the convex rod.

[0072] In one embodiment, the single-tube blowing and sucking machine further includes a conversion assisting device, which is arranged around the rotating axis of the airflow generating device, and the conversion assisting device includes an energy storage unit. When the single-tube blowing and sucking machine switches between the suction mode and the blowing mode, the energy storage unit stores energy to resist the torque around the rotating axis applied by the gravity of the airflow generating device. The stored energy can assist the airflow generating device to rotate in a direction opposite to the rotation direction around the rotating axis applied by the gravity of the airflow generating device.

[0073] In one embodiment, the energy storage unit is a spring.

[0074] In one embodiment, the spring is a torsion spring.

[0075] In one embodiment, the torsion spring is arranged around the rotating axis, and the conversion assisting device further includes a torsion spring limiting portion arranged on the fuselage and a pressing portion arranged on the airflow generating device, and when the single-tube blow-suction machine is switched from the suction mode to the blowing mode, the pressing portion presses one arm of the torsion spring to accumulate energy in the torsion spring; when the single-tube blow-suction machine is switched from the blowing mode to the suction mode, the energy accumulated in the torsion spring assists the rotation of the airflow generating device.

[0076] To achieve the above purpose, the technical solution adopted in the embodiment of the present disclosure is: a blowing and suction machine having a blowing mode and a suction mode, the blowing and suction machine comprising:

[0077] a body, including a grip portion for an operator to hold;

[0078] an airflow generating device connected to the fuselage, the airflow generating device comprising a motor, a fan driven by an output shaft of the motor to rotate and generate airflow, and a volute surrounding the fan, the volute comprising an air inlet and an air outlet communicating with the outside;

[0079] A blowing and suction pipe, having a pipe opening connected to the outside and used for air intake or air exhaust, the blowing and suction pipe having a first end close to the airflow generating device;

[0080] A collecting device, used to collect foreign matter blown out from the air outlet;

[0081] The air inlet portion includes an air inlet for external airflow to enter the inner cavity of the volute, and the air outlet portion includes an air outlet that can be connected to the collecting device.

[0082] The volute is pivotally arranged relative to the holding portion and can rotate at least between a blowing position in a blowing mode and a suction position in a suction mode. When the volute rotates to the blowing position, the air outlet is opposite to the first end of the blowing and suction tube; when the volute rotates to the suction position, the air inlet is engaged and connected with the first end of the blowing and suction tube.

[0083] In one embodiment, the volute rotates 70 to 110 degrees counterclockwise or clockwise around the rotation axis A relative to the gripping portion, so that the blower-vacuum machine is in the blowing mode or in the suction mode.

[0084] In one embodiment, when the blower-suction machine switches from the suction mode to the blowing mode, the volute rotates 90 degrees counterclockwise around the rotation axis A; when the blower-suction machine switches from the blowing mode to the suction mode, the volute rotates 90 degrees clockwise around the rotation axis A.

[0085] In one embodiment, the airflow generating device is an independent integral structure, and the blowing-suction machine also includes a blowing-suction conversion mechanism, which can operably drive the airflow generating device to rotate around the rotation axis A between a blowing position in the blowing mode and a suction position in the suction mode.

[0086] In one embodiment, the blowing and suction pipe includes a first sub-blowing and suction pipe having the pipe opening and a second sub-blowing and suction pipe disposed between the pipe opening and the airflow generating device, wherein the second sub-blowing and suction pipe is operable to be displaced in the axial direction, and the second sub-blowing and suction pipe has a first position close to the airflow generating device and a second position away from the airflow generating device.

[0087] When the second sub-blowing and suction pipe is in the first position, the blower and suction machine is in the blowing mode, and the second sub-blowing and suction pipe is opposite to the air outlet; when the second sub-blowing and suction pipe is in the first position, the blower and suction machine is in the suction mode, and the second sub-blowing and suction pipe is engaged with the air inlet.

[0088] In one embodiment, when the blower-suction machine is in the blowing mode and the suction mode, the axial distance between the front end of the nozzle and the rotation axis A remains unchanged.

[0089] In one embodiment, the blowing and sucking conversion mechanism includes a lever for controlling the second sub-blowing and sucking pipe to move toward the first position or controlling the second sub-blowing and sucking pipe to move toward the second position, and the lever is pivotally connected to the fuselage.

[0090] In one embodiment, the blowing and sucking conversion mechanism also includes an operating component that can be pivotally mounted to the fuselage, and when the second sub-blowing and sucking pipe is in the second position, the operating component can operably drive the airflow generating device to rotate to the blowing position or to the suction position.

[0091] In one embodiment, the blower-vacuum machine further includes a conversion assisting device connected between the fuselage and the airflow generating device, wherein the conversion assisting device includes a first fixing portion connected to the fuselage, a second fixing portion connected to the airflow generating device, and an elastic portion connected between the first fixing portion and the second fixing portion.

[0092] When the blower-suction machine is in the blowing mode, the elastic part is in a stretched state; when the blower-suction machine switches from the blowing mode to the suction mode, the elastic part uses its restoring force and cooperates with the blowing-suction conversion mechanism to drive the airflow generating device to rotate.

[0093] In one embodiment, the conversion assist device is a tension spring.

[0094] In one embodiment, the airflow generating device is an independent integral structure. When the blower-suction machine switches between the blowing position and the suction position, the motor does not rotate relative to the fan, and the motor can be in a rotating state relative to the body.

[0095] In one embodiment, the body includes a main body shell connected to the holding portion, the main body shell is provided with an opening which is hollowed out inside and outside and communicates with the outside, in the blowing mode, the air inlet of the air flow generating device is fluidly connected to the opening, the main body shell is provided with a front end opening and a rear end opening in the extension direction of the blowing and suction tube, and the air flow generating device at least partially extends backward and is exposed to the outside of the rear end opening.

[0096] To achieve the above purpose, the technical solution adopted in the embodiment of the present disclosure is: a blowing and suction machine having a blowing mode and a suction mode, the blowing and suction machine comprising:

[0097] A body, the body comprising a grip for an operator to hold and a main body shell connected to the grip, the main body shell being provided with an opening communicating with the outside;

[0098] an airflow generating device connected to the main body housing, the airflow generating device comprising a motor, a fan driven by an output shaft of the motor to rotate and generate airflow, and a volute surrounding the fan, the volute comprising an air inlet and an air outlet communicating with the outside;

[0099] A blowing and suction pipe, having a pipe opening connected to the outside for air intake or air exhaust, the blowing and suction pipe having a first end close to the airflow generating device;

[0100] A collecting device, used to collect foreign matter blown out from the air outlet;

[0101] The air inlet portion includes an air inlet capable of being in fluid communication with the opening in a blowing mode, and the air outlet portion includes an air outlet capable of being connected to the collecting device in a suction mode;

[0102] The volute is pivotally arranged relative to the main body shell and can rotate at least between a blowing position in a blowing mode and a suction position in a suction mode. When the volute rotates to the blowing position, the air outlet is opposite to the first end of the blowing and suction pipe; when the volute rotates to the suction position, the air inlet is engaged and connected with the first end of the blowing and suction pipe.

[0103] In one embodiment, the grip portion and the host housing are integrally formed.

[0104] Another object of the present invention is to provide a single-tube blowing and suction machine, which can effectively reduce foreign matter clogging in the suction mode.

[0105] To achieve the above purpose, the technical solution adopted in the embodiment of the present disclosure is: a blowing and suction machine having a blowing mode and a suction mode, the blowing and suction machine comprising:

[0106] The body includes a gripping portion for the operator to hold and a main body shell connected to the gripping portion, wherein the main body shell is provided with an opening communicating with the outside;

[0107] An airflow generating device, wherein the main body housing at least partially covers the periphery of the airflow generating device, the airflow generating device comprises a motor, a fan driven by the motor to rotate and generate airflow, and a volute surrounding the fan, the motor comprises a motor body, a motor output shaft extending from the motor body, and the volute comprises an air inlet portion and an air outlet portion connected to each other;

[0108] A blowing and suction tube, having a tube opening connected to the outside for air intake or air exhaust;

[0109] The blowing and suction pipe is a single-cavity air pipe, the fan is a centrifugal fan, the volute housing the centrifugal fan can be pivotally arranged relative to the main body housing, and the volute can at least rotate between a blowing position in a blowing mode and a suction position in a suction mode.

[0110] In the blowing mode, the angle formed by the extension direction of the air inlet part and the extension direction of the blowing and suction pipe is a first angle; in the suction mode, the angle formed by the extension direction of the air outlet part and the extension direction of the blowing and suction pipe is a second angle, and the first angle is equal to the second angle.

[0111] In one embodiment, the centrifugal fan includes an air inlet side perpendicular to the motor output shaft and an air outlet side parallel to the motor output shaft, and in the blowing mode, the pipe mouth is located directly in front of the air outlet side; in the suction mode, the pipe mouth is located directly in front of the air inlet side.

[0112] In one embodiment, the airflow generating device is an independent integral structure, and the independent integral structure is rotatably mounted on the main body housing.

[0113] In one embodiment, the blower-suction machine includes a collecting device detachably connected to the air outlet, and the collecting device is located below the machine body.

[0114] In one embodiment, the air inlet portion includes an air inlet that can be connected to the opening in a blowing mode, and the air outlet portion includes an air outlet that can be connected to the collecting device in a suction mode, and the air outlet and the air inlet are staggered by 90 degrees around the rotation axis A.

[0115] In one embodiment, in the blowing mode, the motor body is located below the centrifugal fan; in the suction mode, the motor body is located at the rear side of the centrifugal fan.

[0116] In one embodiment, a cross-sectional area of ​​the pipe opening in a direction perpendicular to the air inlet direction is greater than a cross-sectional area of ​​the air outlet in a direction perpendicular to the air outlet direction.

[0117] To achieve the above purpose, the technical solution adopted in the embodiment of the present disclosure is: a blowing and suction machine having a blowing mode and a suction mode, the blowing and suction machine comprising:

[0118] A body, the body comprising a grip portion and a host housing connected to the grip portion, the host housing being provided with an opening communicating with the outside;

[0119] an airflow generating device connected to the main body housing, the airflow generating device comprising a motor, a fan driven by the motor to rotate and generate airflow, and a volute surrounding the fan, the motor comprising a motor body and a motor output shaft extending from the motor body, and the volute comprising an air inlet portion and an air outlet portion connected to each other;

[0120] A blowing and suction tube, having a nozzle connected to the outside and used for air intake or air exhaust;

[0121] The blowing and suction pipe is a single-cavity air pipe, the fan is a centrifugal fan, the volute housing the centrifugal fan can be pivotally arranged relative to the gripping portion, and the volute can at least rotate between a blowing position in a blowing mode and a suction position in a suction mode.

[0122] In the blowing mode, the angle formed by the extension direction of the air inlet part and the extension direction of the blowing and suction pipe is a first angle; in the suction mode, the angle formed by the extension direction of the air outlet part and the extension direction of the blowing and suction pipe is a second angle, and the first angle is equal to the second angle.

[0123] In one embodiment, the first angle is 90 degrees.

[0124] In one embodiment, in the suction mode, the motor body, the centrifugal fan, and the blowing and suction pipe are arranged in sequence in the axial direction.

[0125] Another object of the present invention is to provide a single-tube blowing-suction machine that can take into account both blowing efficiency and suction efficiency.

[0126] To achieve the above purpose, the technical solution adopted in the embodiment of the present disclosure is: a blowing and suction machine having a blowing mode and a suction mode, the blowing and suction machine comprising:

[0127] An airflow generating device, comprising a motor, a fan driven by an output shaft of the motor to rotate and generate airflow, and a volute surrounding the fan, wherein the volute comprises an air inlet portion and an air outlet portion connected to each other;

[0128] A blowing and suction pipe, connected to the main body housing and having a pipe opening connected to the outside for air intake or air exhaust;

[0129] The air inlet portion includes an air inlet connected to the outside in the blowing mode, and the air outlet portion includes an air outlet for the inhaled foreign matter to flow out in the suction mode.

[0130] The fan is a centrifugal fan, and the blowing and suction pipe is a single-cavity air duct, which is provided with a first end close to the airflow generating device. The volute and the blowing and suction pipe are operable to move relative to each other so that the blowing and suction machine can switch between the blowing mode and the suction mode. In the blowing mode, there is a gap between the air outlet and the first end so that external airflow can enter the blowing and suction pipe from the gap.

[0131] In one embodiment, the blower-suction machine includes a body arranged outside the airflow generating device, the body includes a grip portion and a main body shell connected to the grip portion, and the body is also provided with an opening connected to the outside world. In the blowing mode, the opening is fluidly connected to the air inlet portion.

[0132] In one embodiment, the airflow generating device is an independent integral structure, which is pivotally arranged relative to the main body shell and can rotate at least between a blowing position in a blowing mode and a suction position in a suction mode. When the airflow generating device is rotated to the blowing position, the airflow flows into the volute from the opening and flows from the air outlet of the airflow generating device to the blowing and suction pipe; when the volute is rotated to the suction position, the airflow enters the volute from the pipe mouth and flows out from the air outlet.

[0133] In one embodiment, the first end of the blowing and suction pipe and the air outlet portion at least partially overlap in the axial direction.

[0134] In one embodiment, the ratio of the cross-sectional area of ​​the air outlet in a direction perpendicular to the air outlet direction to the cross-sectional area of ​​the first end in a direction perpendicular to the air outlet direction is greater than or equal to 1.5 and less than or equal to 6.

[0135] In one embodiment, the blowing and suction pipe is segmented, including a first sub-blowing and suction pipe away from the airflow generating device and a second sub-blowing and suction pipe close to the airflow generating device, and an end of the second sub-blowing and suction pipe close to the airflow generating device forms the first end of the blowing and suction pipe.

[0136] In one embodiment, the second sub-blowing and suction pipe is operable to be displaced axially relative to the first sub-blowing and suction pipe, and the second sub-blowing and suction pipe has a first position close to the airflow generating device and a second position away from the airflow generating device. When the second sub-blowing and suction pipe is in the second position, the airflow generating device can freely switch between the blowing mode and the suction mode.

[0137] In one embodiment, the blowing-suction machine further includes a blowing-suction conversion mechanism operable to drive the airflow generating device to pivot around a rotation axis A relative to the main body housing.

[0138] In one embodiment, the blowing and sucking conversion mechanism includes a lever for controlling the second sub-blowing and sucking pipe to move to the first position or controlling the second sub-blowing and sucking pipe to move to the second position, and the lever is pivotally connected to the blowing and sucking pipe.

[0139] In one embodiment, the blowing and sucking conversion mechanism also includes an operating component that can be pivotally mounted to the fuselage, and when the second sub-blowing and sucking pipe is in the second position, the operating component can operably drive the airflow generating device to be in the blowing position or the sucking position.

[0140] Another object of the present invention is to provide a single-tube blowing and suction machine that is easy to operate and has improved user comfort.

[0141] To achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the present disclosure is: a blowing and suction machine having a blowing mode and a suction mode, the blowing and suction machine comprising:

[0142] The body includes a grip portion and a main body shell connected to the grip portion, wherein the main body shell is provided with an opening communicating with the outside;

[0143] an airflow generating device connected to the main body housing, the airflow generating device comprising a motor, a fan driven by an output shaft of the motor to rotate and generate airflow, and a volute surrounding the fan, the volute comprising an air inlet and an air outlet connected to each other;

[0144] A blowing and suction tube, having a tube opening connected to the outside for air intake or air exhaust;

[0145] The air inlet portion includes an air inlet in fluid communication with the opening in a blowing mode, and the air outlet portion includes an air outlet for the inhaled foreign matter to flow out in a suction mode.

[0146] The blowing and suction pipe is a single-cavity air duct, which is provided with a first end close to the volute. The blowing and suction machine also includes a blowing and suction conversion mechanism, which is a linkage device. The linkage device can drive the first end of the blowing and suction pipe to be away from the air inlet or the air outlet of the volute by a preset distance, and can link the volute to rotate relative to the main body shell to the blowing position in the blowing mode or to the suction position in the suction mode. When the volute rotates from the blowing position to the suction position, the linkage device can link the first end of the blowing and suction pipe to be opposite to the air inlet; when the volute rotates from the suction mode to the blowing mode, the linkage device can link the first end of the blowing and suction pipe to be opposite to the air outlet.

[0147] In one embodiment, the linkage device drives the blowing and suction pipe to move axially relative to the volute so that the first end of the blowing and suction pipe is away from the air inlet of the volute or the air outlet of the volute by a preset distance.

[0148] In one embodiment, when the linkage device links the volute to rotate relative to the main body housing to the blowing position, the linkage device can continue to operate and drive the first end of the blowing and suction pipe to move a preset distance toward the air outlet of the volute;

[0149] When the linkage device links the volute to rotate relative to the main body shell to the suction position, the linkage device can continue to operate and drive the first end of the blowing and suction pipe to move a preset distance toward the air inlet part of the volute, and the first end of the blowing and suction pipe is sealed and engaged with the air inlet part of the volute.

[0150] In one embodiment, the airflow generating device is an independent integral structure, and the linkage device can drive the independent integral structure to rotate relative to the main body housing.

[0151] In one embodiment, the linkage device comprises a connecting rod, a turntable pivotally mounted to the fuselage, and a linkage member fixedly connected to the airflow generating device, the turntable is further provided with a protruding rod capable of engaging with the linkage member to drive the linkage member to rotate, one end of the connecting rod is pivotally connected to the first end of the blowing and suction tube, and the other end of the connecting rod is pivotally connected to the turntable;

[0152] The connecting rod and the turntable form a crank-connecting rod mechanism to convert the rotation of the turntable into axial movement of the blowing and suction tube, and the turntable, the protruding rod and the linkage constitute a groove wheel mechanism to convert the continuous rotation of the turntable into intermittent rotation of the airflow generating device relative to the main body housing through the engagement of the protruding rod and the linkage.

[0153] In one embodiment, the linkage device links the airflow generating device to switch from the blowing mode to the suction mode or from the suction mode to the blowing mode, and the rotation angle of the turntable is greater than the rotation angle of the linkage linking the airflow generating device.

[0154] In one embodiment, the linkage includes a first sliding surface and a second sliding surface adapted to the outer circumferential surface of the turntable, and a groove arranged between the first sliding surface and the second sliding surface. When the blower-suction machine is in the blowing mode, the outer circumferential surface of the turntable is opposite to the first sliding surface; when the airflow generating device is switched to the suction mode, the outer circumferential surface of the turntable is opposite to the second sliding surface.

[0155] In one embodiment, the turntable rotates and drives the protruding rod and the slot to switch from engagement to disengagement, and when the first sliding surface of the linkage member and the outer peripheral surface of the turntable slide relative to each other, the protruding rod and the slot are disengaged; the protruding rod engages with the slot, and the turntable drives the linkage member to rotate circumferentially.

[0156] In one embodiment, when the protruding rod is disengaged from the slot, the turntable can continue to rotate a preset distance and drive the blowing and suction tube to move toward the direction close to the airflow generating device through one end of the connecting rod.

[0157] In one embodiment, the turntable includes an anti-rotation plug at least partially protruding from the body, and the linkage device also includes an operating component adaptably connected to the anti-rotation plug, and the operating component drives the turntable to rotate circumferentially.

[0158] In one embodiment, the operating component includes a handwheel with a recessed receiving chamber and a base arranged in the receiving chamber and protruding in the direction of the airflow generating device, the base is provided with an anti-rotation plug interface adapted to the anti-rotation plug connector, the anti-rotation plug connector is a flat square structure, and the anti-rotation plug interface is a flat square groove.

[0159] In one embodiment, the linkage device further includes a locking mechanism capable of limiting the airflow generating device at the blowing position or at the suction position, and the locking mechanism is disposed between the operating assembly and the main body housing.

[0160] In one embodiment, the locking mechanism includes a locking member provided with a locking pin, and the main body housing is provided with a groove that can be locked with the locking pin to lock the blower-vacuum machine in the corresponding working mode. The operating component can operably drive the locking pin and the groove to separate or lock, so as to realize the conversion of the blower-vacuum machine between the blowing mode and the suction mode.

[0161] In one embodiment, the locking mechanism further includes an elastic member disposed between the locking member and the operating assembly, and the elastic member can apply a restoring force to the locking mechanism and the groove.

[0162] In one embodiment, the locking member includes a base and a matching portion arranged on the base, the locking pin is located at the free end of the base, and the operating component is also provided with an actuating portion capable of cooperating with the matching portion, and the actuating portion can push the matching portion to drive the locking pin to disengage from the groove.

[0163] In one embodiment, the operating component includes an exposed pressing portion for pressing, and the actuating portion and the exposed pressing portion are integrally formed. When the exposed pressing portion is subjected to an external force, the actuating portion can be displaced relative to the host housing and push the mating portion to achieve separation of the groove and the locking pin.

[0164] In one embodiment, a moving direction of the actuating portion relative to the host housing is opposite to a moving direction of the matching portion relative to the host housing.

[0165] In one embodiment, an actuating surface is formed on one end of the matching portion facing the actuating portion, and the actuating surface is an inclined slope.

[0166] In one embodiment, when the linkage device drives the volute to rotate, the motor can be in a state of driving the fan to rotate.

[0167] Another object of the present invention is to provide a single-tube blowing and suction machine, which is convenient for switching between blowing and suction and has a small main body shell.

[0168] To achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the present disclosure is: a blowing and suction machine having a blowing mode and a suction mode, the blowing and suction machine comprising:

[0169] A body, the body comprising a grip portion and a host housing connected to the grip portion, the host housing being provided with an opening communicating with the outside;

[0170] an airflow generating device connected to the main body housing, the airflow generating device comprising a motor, a fan driven by the output shaft of the motor to rotate and generate airflow, and a volute surrounding the fan, the volute comprising an air inlet and an air outlet connected to each other, the fan comprising a wheel disc and a plurality of blades arranged around the wheel disc;

[0171] A blowing and suction pipe connected to the fuselage and having a pipe opening connected to the outside and used for air intake or air exhaust, wherein the blowing and suction pipe is provided with a first end close to the airflow generating device;

[0172] The main housing is at least partially wrapped around the periphery of the volute, and the volute is pivotally arranged relative to the main housing, and can at least rotate between a blowing position in a blowing mode and a suction position in a suction mode, the maximum distance from the rotation center of the fan to the inner wall of the volute is L1, the distance from the rotation center of the fan to the edge of the blade is L2, and the ratio of the distance L1 to the distance L2 is greater than or equal to 1.2 and less than or equal to 2.

[0173] In one embodiment, a ratio of the distance L1 to the distance L2 is greater than or equal to 1.8 and less than or equal to 2.

[0174] In one embodiment, in the extension direction of the rotation axis of the fan, the maximum distance between the two opposite inner walls of the volute is W1, the height of the fan is W2, and the ratio of the maximum distance W1 to the height W2 is greater than 1.

[0175] In one embodiment, the volute includes a spiral portion, a roar portion, and a volute tongue formed between the starting end of the spiral portion and the roar portion, and the ratio of the minimum distance between the volute tongue and the blade edge close to the volute tongue to the diameter of the fan is 0.08 to 0.12.

[0176] In one embodiment, the ratio of the minimum distance between the volute tongue and the blade edge close to the volute tongue to the maximum distance L1 from the rotation center of the fan to the inner wall of the volute is greater than or equal to 0.06.

[0177] In one embodiment, the fan is a centrifugal fan.

[0178] In one embodiment, the air outlet portion includes an air outlet for sucked foreign matter to flow out in the suction mode, and in the blowing mode, there is a gap between the air outlet and the first end for external airflow to enter the blowing and suction pipe.

[0179] In one embodiment, the ratio of the cross-sectional area of ​​the air outlet in a direction perpendicular to the air outlet direction to the cross-sectional area of ​​the first end in a direction perpendicular to the air outlet direction is greater than or equal to 1.5 and less than or equal to 6.

[0180] In one embodiment, the ratio of the cross-sectional area of ​​the air outlet in a direction perpendicular to the air outlet direction to the cross-sectional area of ​​the first end in a direction perpendicular to the air outlet direction is greater than or equal to 3 and less than or equal to 5.

[0181] In the single-tube blowing and suction machine of the present invention, blowing and suction share one tube, and the blowing and suction switching does not need to be disassembled and exchanged, and the blowing and suction switching can be realized by rotating the airflow generating device relative to the machine body at a certain angle. The human-machine interaction is good, the user's comfort is improved, and the user's efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0182] Figure 1A The single-tube blowing-suction machine according to the present invention is shown, and the single-tube blowing-suction machine is in a suction mode;

[0183] Figure 1B The single-tube blowing-vacuum machine according to the present invention is shown, and the single-tube blowing-vacuum machine is in a blowing mode;

[0184] Figure 2A The figure shows the connection mode between the air inlet portion of the volute of the single-tube blowing-suction machine in FIG1 and the blowing-suction pipe;

[0185] Figure 2B The figure shows the connection mode between the air outlet portion of the volute of the single-tube blowing-suction machine in FIG1 and the blowing-suction pipe;

[0186] Figure 3A and Figure 3B A single-tube blowing and suction machine according to the present invention is shown, wherein some structures are omitted to illustrate the linkage device;

[0187] 4A to 4F The action process of the linkage device of the present invention is shown.

[0188] Figure 5 A partial structure of a body of a single-tube blower-vacuum machine according to a second embodiment of the present invention is shown.

[0189] FIG. 6A to FIG. 6CA schematic diagram of a switching assistance device according to a third embodiment of the present invention is shown.

[0190] Figure 7 is a cross-sectional view of a volute according to a fourth embodiment of the present invention.

[0191] Fig. 8A and Figure 8B A single-tube blowing-suction machine according to a fifth embodiment of the present invention is shown. Fig. 8A In the single-tube blowing and suction machine, the single-tube blowing and suction machine is in the suction mode. Figure 8B In the present embodiment, the single-tube blower-vacuum machine is in blowing mode.

[0192] Fig. 9 4 is a cross-sectional view of a partial structure of the blower-vacuum machine in a blowing mode according to a first embodiment of the present invention.

[0193] Fig.10 It is a partial cross-sectional view after the linkage device drives the airflow generating device to rotate 90 degrees according to the first embodiment of the present invention.

[0194] Fig.11 It is a partial exploded view of the blowing-suction machine according to the present invention without the blowing-suction pipe and the power supply device.

[0195] Fig.12 1 is a perspective schematic diagram of an operating assembly and a locking mechanism according to a first embodiment of the present invention.

[0196] Fig.13 yes Fig.12 A three-dimensional schematic diagram of the operating assembly and the locking mechanism from another angle is shown.

[0197] Fig.14 yes Fig.12 Partial exploded view of the operating assembly and locking mechanism shown.

[0198] Fig.15 yes Fig.14 Another schematic diagram of the exploded view of the part shown.

[0199] Fig.16 yes Fig.12 A partial three-dimensional schematic diagram of the structure shown.

[0200] Fig.17 2. It is a rear view of the blowing-suction machine according to the third embodiment of the present invention in the suction mode.

[0201] Fig.18 yes Fig.17 A partial enlargement of the circled part. DETAILED DESCRIPTION

[0202] The exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present invention, and are not intended to exhaust all possible modes of the present invention, nor to limit the scope of the present invention.

[0203] First embodiment

[0204] First, the overall structure of the single-tube blower-vacuum machine according to the first embodiment of the present invention will be described.

[0205] like Figure 1A and Figure 1B As shown, the first embodiment of the present invention provides a single-tube blower-vacuum machine (sometimes referred to as a "blower-vacuum machine") 100 for cleaning fallen leaves and broken branches in a garden, which includes a body 1, a blower-vacuum tube 2, and an airflow generating device 3. Specifically, the blower-vacuum machine 100 can use the blowing function to collect scattered leaves, and can also use the suction function to suck the leaves into a designated garbage collection device, thereby achieving the purpose of cleaning. Therefore, the blower-vacuum machine 100 has at least two working modes. When the blower-vacuum machine 100 is in the first working mode, the blower-vacuum machine 1 performs the blowing function, and when the blower-vacuum machine 100 is in the second working mode, the blower-vacuum machine 1 performs the suction function. Therefore, the first working mode can also be referred to as the blowing mode (such as Figure 1B ), the second working mode can also be called the suction mode (such as Figure 1A The blower-vacuum machine 100 can selectively operate in a blowing mode or a suction mode according to actual needs of the user.

[0206] The blowing and suction machine 100 is Figure 1A and Fig. 9 The axis of the shaft extends in the direction indicated by the arrow X, which is defined as the axial direction. Figure 1A and Fig. 9 As shown, in the axial direction, the direction of the blowing and suction pipe 2 away from the airflow generating device 3 is defined as the front, the other side opposite is defined as the rear, the top of the drawing is defined as the top, and the bottom of the drawing is defined as the bottom. Fig.17 The above definitions are for illustration only and are not to be construed as limitations of the present invention.

[0207] As shown in Figures 1 to 4, Figures 9 to 11As shown, the body 1 includes a gripping portion (handle) 11 and a main body shell 10 connected to the gripping portion 11. The gripping portion 11 and the main body shell 10 can be arranged in one piece, or of course, can be arranged separately. The main body shell 10 is provided with a blowing and suction pipe connecting portion 12 and a body air inlet portion 13. In the illustrated example, the body air inlet portion 13 is located near the gripping portion 11, and the body air inlet portion 13 includes an opening 130 connected to the outside. The first end 21 of the blowing and suction pipe 2 is installed to the blowing and suction pipe connecting portion 12, and the second end of the blowing and suction pipe 2 is opposite to the first end 21 in the axial direction, and is formed with a pipe opening 22 for air intake and air outlet. As shown Figure 1A and 1B As shown, the nozzle 22 is preferably inclined relative to the extension direction (central axis) of the blowing and suction pipe 2, that is, the plane where the nozzle 22 is located is not perpendicular to the extension direction of the blowing and suction pipe 2. In the example shown in the figure, the blowing and suction pipe 2 is a straight pipe. However, the present invention is not limited to this, and one or some parts of the blowing and suction pipe 2 can have a certain curvature.

[0208] Reference Figure 1A and 1B , Figure 2A and 2B as well as Figures 9 to 11 , the airflow generating device 3 is at least partially exposed to the outside of the fuselage 1. Specifically, the main body housing 10 is provided with a front opening 101 and a rear opening 102 in the front-to-back direction, and the airflow generating device 3 at least partially extends backward and is exposed to the outside of the rear opening 102. The airflow generating device 3 includes a motor 31, a fan 32 connected to the motor 31, and a volute 33 surrounding the fan 32. The motor 31 includes a motor body 311 and a motor output shaft 312 extending from the motor body 311. The rotation axis of the motor output shaft 312 and the rotation axis of the fan 32 are substantially coincident. In one embodiment, the volute 33 can be fixedly connected or integrally formed with the motor barrel of the motor 31 (the motor housing 313 wrapped around the outer periphery of the motor 31), so that the entire airflow generating device 3 becomes an independent integral structure. Of course, the volute and the motor housing 313 can also be separately provided. The volute 33 includes an air inlet (air inlet pipe) 331 and an air outlet (air outlet pipe) 332 connected to the outside. The air inlet 331 includes an air inlet 3310 that can be fluidically connected to the opening 130 in the blowing mode, and the air inlet 3310 is arranged toward the gripping portion 11. Preferably, the opening 130 is located directly above the air inlet 3310, so that the airflow directly enters the air inlet 331 without turning. The air outlet 332 includes an air outlet 3320 that can be connected to the collecting device in the suction mode, and foreign matter sucked into the blowing and suction tube 2 can pass through the fan 32 and flow into the collecting device through the air outlet 3320. It should be noted that "fluid communication" should be understood as gas can flow between the two ports.

[0209] like Fig. 9 and Fig.10 As shown, the fan 32 may be a double-layered fan blade structure, with main blades disposed on one side of the fan disc and auxiliary blades disposed on the other side of the fan disc. The auxiliary blades are mainly used to cool the motor, and the main blades are mainly used to achieve the function of blowing air. Specifically, in this embodiment, as Fig. 9 and Fig.10 As shown, the fan 32 selected for the single-tube blowing and sucking machine 100 provided by the present invention is a centrifugal fan, and the fan 32 includes a wheel disc 321 and a plurality of blades 322 arranged circumferentially around the wheel disc 321. When the centrifugal fan 32 is driven to rotate by the motor 31, the gas filled between the blades of the centrifugal fan 3 is pushed by the blades 322 and thrown to the outer edge of the blades due to the centrifugal force. After the pressure energy and kinetic energy of the gas increase, it flows out from the outer edge of the blades 322, and a negative pressure is formed in the middle of the blades 322, so that the gas is continuously sucked in and discharged, generating axial suction force and radial blowing force. In particular, when the blowing and sucking machine 100 is in the suction mode, when the shell part around the centrifugal fan 32 is blocked by debris such as leaves, in this case, the centrifugal fan 32 can make the output suction force greater, making it easy to suck out and discharge the blocked leaves. Refer to Fig. 9 and Fig.10 The centrifugal fan 32 has an air inlet side 323 perpendicular to the motor output shaft 312 and an air outlet side 324 parallel to the motor output shaft 312. In the blowing mode, the air inlet 3310 to the air inlet side 323 form an air inlet channel Q1, and the air outlet side 324 to the pipe port 22 form an air outlet channel Q2; in the suction mode, the pipe port 22 to the air inlet side 323 form a dust suction channel Q3, and the air outlet side 324 to the air outlet 3320 form a dust outlet channel Q4.

[0210] In the present invention, the volute 33 and the blowing and suction pipe 2 can be relatively moved so that the blowing and suction machine 100 can be switched between the blowing mode and the suction mode. As a feasible implementation, the air inlet channel Q1 and the dust suction channel Q3 can be designed to be offset clockwise or counterclockwise from the motor output shaft 312 by a certain preset angle. The air outlet channel Q2 and the dust outlet channel Q4 can be designed to be offset clockwise or counterclockwise from the direction perpendicular to the motor output shaft 312 by a certain preset angle. Specifically, when the blower-suction machine 100 is in the blowing mode, the extension direction of the air inlet channel Q1 is configured to be consistent with the extension direction of the motor output shaft 312 or offset by 20 degrees clockwise or counterclockwise from the extension direction of the motor output shaft 312, and the extension direction of the air outlet channel Q2 is configured to be perpendicular to the extension direction of the motor output shaft 312 or offset by 20 degrees clockwise or counterclockwise from the direction perpendicular to the extension direction of the motor output shaft 312; when the blower-suction machine 100 is in the suction mode, the extension direction of the dust suction channel Q3 is configured to be basically consistent with the extension direction of the motor output shaft 312 or offset by 20 degrees clockwise or counterclockwise from the extension direction of the motor output shaft 312, and the extension direction of the dust outlet channel Q4 is configured to be perpendicular to the extension direction of the motor output shaft 312 or offset by 20 degrees clockwise or counterclockwise from the direction perpendicular to the extension direction of the motor output shaft 312.

[0211] Specifically, in some embodiments, when the blowing and suction machine 100 is in the blowing mode, the extension direction of the air inlet channel Q1 can be configured to be consistent with the extension direction of the motor output shaft 312. At this time, the air outlet channel Q2 can be configured to be consistent with the direction perpendicular to the extension direction of the motor output shaft 312 or to be offset counterclockwise within 20 degrees from the direction perpendicular to the extension direction of the motor output shaft 312 or to be offset clockwise within 20 degrees from the direction perpendicular to the extension direction of the motor output shaft 312. Preferably, the air outlet channel Q2 is configured to be consistent with the direction perpendicular to the extension direction of the motor output shaft 312 or to be offset counterclockwise within 10 degrees from the direction perpendicular to the extension direction of the motor output shaft 312 or to be offset clockwise within 10 degrees from the direction perpendicular to the extension direction of the motor output shaft 312.

[0212] When the blower-vacuum machine 100 is in the blowing mode, the extension direction of the air inlet channel Q1 can be configured to be within a 20-degree counterclockwise offset range from the extension direction of the motor output shaft 312, and the air outlet channel Q2 can be configured to be consistent with the direction perpendicular to the extension direction of the motor output shaft 312, or to be within a 20-degree counterclockwise offset range from the direction perpendicular to the extension direction of the motor output shaft 312, or to be within a 20-degree clockwise offset range from the direction perpendicular to the extension direction of the motor output shaft 312.

[0213] When the blower-suction machine 100 is in the blowing mode, the extension direction of the air inlet channel Q1 can be configured to be within a 20-degree clockwise offset range from the extension direction of the motor output shaft 312, and the air outlet channel Q2 can be configured to be consistent with the direction perpendicular to the extension direction of the motor output shaft 312 or to be within a 20-degree clockwise offset range from the direction perpendicular to the extension direction of the motor output shaft 312.

[0214] When the blower-suction machine 100 is in the suction mode, the extension direction of the dust suction channel Q3 is configured to be basically consistent with the extension direction of the motor output shaft 312, and the dust exhaust channel Q4 is configured to be consistent with the direction perpendicular to the extension direction of the motor output shaft 312 or to be offset within 20 degrees clockwise or counterclockwise from the direction perpendicular to the extension direction of the motor output shaft 312.

[0215] When the blower-suction machine 100 is in the suction mode, the extension direction of the dust suction channel Q3 is configured to be within a 20-degree clockwise offset range from the extension direction of the motor output shaft 312, and the dust exhaust channel Q4 is configured to be consistent with the direction perpendicular to the extension direction of the motor output shaft 312 or to be within a 20-degree clockwise offset range from the direction perpendicular to the extension direction of the motor output shaft 312.

[0216] When the blower-suction machine 100 is in the suction mode, the extension direction of the dust suction channel Q3 is configured to be offset within 20 degrees counterclockwise from the extension direction of the motor output shaft 312, and the dust exhaust channel Q4 is configured to be consistent with the direction perpendicular to the extension direction of the motor output shaft 312 or offset within 20 degrees counterclockwise or clockwise from the direction perpendicular to the extension direction of the motor output shaft 312.

[0217] It is easy to understand that in the blowing mode, the air inlet channel Q1 is offset within a certain preset range clockwise or counterclockwise with respect to the extension direction of the motor output shaft 312, and the air outlet channel Q2 is offset within a certain range clockwise or counterclockwise with respect to the direction perpendicular to the extension direction of the motor output shaft. Through such a configuration, in the blowing mode, the blowing efficiency can meet the requirements.

[0218] In the suction mode, the dust suction channel Q3 is offset within a certain range clockwise or counterclockwise with respect to the extension direction of the motor output shaft 312, and the dust exhaust channel Q4 is offset within a certain range clockwise or counterclockwise in a direction perpendicular to the extension direction of the motor output shaft. Through such a configuration, the suction efficiency in the suction mode can also meet the requirements.

[0219] Preferably, if Figures 1A to 2B and Fig. 9 and Fig.10In the example, in the blowing mode, the extension direction of the motor output shaft 312 is consistent with the extension direction of the air inlet 331, and the extension direction of the air outlet 332 is perpendicular to the extension direction of the motor output shaft 312. In the suction mode, the extension direction of the motor output shaft 312 is consistent with the extension direction of the blowing and suction pipe 2, and the extension direction of the air outlet 332 is perpendicular to the extension direction of the motor output shaft 312. More specifically, as Figures 1A to 2B and Fig. 9 and Fig.10 As shown, in the blowing mode, the air inlet 3310 is located directly above the air inlet side 323 of the fan 32, and the air outlet 3320 is located directly in front of the air outlet side 324. The extension direction of the blowing and suction pipe 2 is consistent with the extension direction of the air outlet 332. In the suction mode, the pipe mouth 22 is located directly in front of the air inlet 3310, and the air inlet 3310 is located directly in front of the air inlet side 323. The rotation axis of the motor output shaft 312, the rotation axis of the fan 32 and the central axis of the blowing and suction pipe 2 basically coincide. The air outlet 3320 is located directly below the air outlet side 324 of the fan 32. In this way, the airflow goes straight in and out. On the one hand, in the blowing mode, the airflow loss caused by the bend is reduced, and the blowing effect is increased; on the other hand, in the suction mode, the blockage of the inhaled object is reduced, and the suction efficiency is increased.

[0220] With regard to the operative relative movement of the volute 33 and the blowing and suction pipe 2, in a feasible embodiment, as Figures 1A to 4D and Fig. 9 and Fig.11 As shown, the volute 33 rotates to switch between blowing and suction. Specifically, the volute 33 is pivoted relative to the grip portion 11 or the main body housing 10, and can at least rotate between a blowing position in the blowing mode and a suction position in the suction mode. Figure 1B , Figure 2B , Figure 3B and Fig. 9 ), the air flows from the opening 130 of the main body housing 10 and flows into the volute 33 through the air inlet 331, and flows from the air outlet 332 of the volute 33 to the blowing and suction pipe 2; when the volute 33 rotates to the suction position (please refer to Figure 1A , Figure 2A , Figure 3A and Fig.10 ), the airflow enters the volute 33 from the pipe opening 22, and flows out from the air outlet 332. The opening direction of the opening 130 of the air inlet 13 and the opening direction of the air outlet 332 are arranged opposite to each other.

[0221] In this embodiment, if Fig. 9 and Fig.10As shown, the grip 11 extends longitudinally along the first axis Y, the blowing and suction tube 2 extends longitudinally along the second axis Z, and when the volute 33 rotates to switch between the blowing mode and the suction mode, the angle formed by the first axis Y and the second axis Z remains unchanged. It should be noted that when the first axis Y and the second axis Z are configured to be parallel to each other, the angle is 0 degrees. The blowing and suction tube 2 is a single-chamber air duct, and the extension direction of the blowing and suction tube 2 remains unchanged when the blowing and suction machine 100 is in the blowing mode or in the suction mode. With such a design, in the blowing mode and the suction mode, only the volute 33 rotates, and the installation direction of the blowing and suction tube 2 does not change. In other words, the angle between the blowing and suction tube 2 and the body 1 / grip 11 does not change. When switching between blowing and suction, only the volute 33 needs to be rotated, and the body 1 (grip 11) and the blowing and suction tube 2 remain unchanged in posture or direction relative to the human body. The operator does not need to adjust the holding method, and the blowing and suction machine 100 is always in a single-handed operation form. This simplifies the operation when switching between blowing and vacuuming, reduces the design difficulty of the human-machine interaction of the blowing and vacuuming machine, and makes it easier for the operator to lift the machine for cleaning.

[0222] Further, when the volute 33 rotates to the blowing position, the air outlet 3320 is opposite to the first end of the blowing and suction pipe 2, and the angle formed by the extension direction of the air inlet 331 and the extension direction of the blowing pipe 2 is a first angle α (such as Fig. 9 When the volute 33 rotates to the suction position, the air inlet 3310 is connected to the first end of the blowing and suction pipe 2, and the angle formed by the extension direction of the air outlet 332 and the extension direction of the blowing and suction pipe 2 is a second angle β (as shown in FIG. Fig.10 As shown). Here, "the air outlet 3320 is opposite to the first end of the blowing and suction pipe 2" can be understood as that the air outlet 3320 and the first end of the blowing and suction pipe 2 can be designed as a fully sealed connection, or can be designed as a non-fully sealed connection. Among them, the first angle α is equal to the second angle β. The first angle α and the second angle β can be 70 to 110 degrees. Preferably, the first angle α and the second angle β are both 90 degrees. It is easy to understand that the air outlet 332 and the air inlet 331 are staggered 70 to 110 degrees around the rotation axis A. Or the air outlet 3320 and the air inlet 3310 are staggered 70 to 110 degrees around the rotation axis A, preferably, the staggered angle is 90 degrees.

[0223] Further, it is easy to understand that, referring to the figure, the blowing and sucking machine 100 is in the blowing mode, and the angle between the extension direction X1 of the motor output shaft 312 and the extension direction X2 of the motor output shaft 312 in the suction mode is 70 degrees to 110 degrees. Preferably, the angle is 90 degrees, and the volute 33 rotates 70 degrees to 110 degrees counterclockwise or clockwise around the rotation axis A relative to the main body housing 10, so that the blowing and sucking machine 100 is in the blowing mode or in the suction mode. Preferably, the rotation angle of the volute 33 is 90 degrees.

[0224] Since the blowing and suction pipe 2 used in the blowing and suction modes of the blowing and suction machine 100 in the embodiment of the present disclosure is the same, it is not difficult to understand that in the blowing and suction machine 100 in the embodiment of the present disclosure, the air outlet for the airflow to flow out in the blowing mode and the air outlet for the airflow to carry foreign objects (such as leaves, branches, etc.) in the suction mode are the same air outlet, namely, the pipe opening 22. In order to ensure that foreign objects with larger shapes such as leaves and branches can smoothly pass through the pipe opening 22 into the blowing and suction pipe 2, the cross-sectional area of ​​the pipe opening 22 in the direction perpendicular to the air inlet direction is not less than the cross-sectional area of ​​the air outlet 3320 in the direction perpendicular to the air outlet direction. Preferably, the cross-sectional area of ​​the pipe opening 22 in the direction perpendicular to the air inlet direction is greater than the cross-sectional area of ​​the air outlet 3320 in the direction perpendicular to the air outlet direction. In this way, the relatively large cross-sectional design of the pipe mouth 22 can, on the one hand, reduce the possibility that larger foreign objects cannot enter the blowing and suction tube 2 through the pipe mouth 22 in the suction mode, or that larger foreign objects block the pipe mouth 22; on the other hand, the relatively small cross-sectional area 3320 design of the air outlet can increase the airflow velocity.

[0225] In this embodiment, the airflow generating device 3 is an independent integral structure, which is rotatably mounted to the fuselage 1, that is, when the blowing and sucking machine 100 switches between the blowing mode and the suction mode, the airflow generating device 3 provided with the motor 31 and the fan 32 rotates relative to the main body housing 10 as a whole. Therefore, when the blowing and sucking machine 100 switches between the blowing position and the suction position, the motor 31 and the fan 32 do not need to stop running, and the user can directly switch between blowing and sucking when the motor 31 and the fan 32 are in the working state. That is, when the blowing and sucking machine 100 switches between the blowing mode and the suction mode, the motor 31 can not rotate relative to the fan 32, and the motor 31 rotates relative to the fuselage 1. Preferably, in the example shown in the figure, the blowing and sucking conversion is achieved by rotating the airflow generating device 3 around the fuselage 1 by 90 degrees. When the air inlet 331 of the air flow generating device 3 rotates to the vertical upward direction (aligned with the air inlet 13 of the fuselage), it is in the blowing mode. When the air inlet 331 rotates to the right (aligned with the first end 21 of the blowing and suction pipe 2), it is in the suction mode. Figure 1A ), the motor body 311 is located at the rear side of the centrifugal fan 32, and the output shaft of the motor 31 is parallel to the central axis of the blowing and suction pipe 2; in the blowing mode (for example, refer to Figure 1B ), the motor body 311 is located below the centrifugal fan 32, and the output shaft 312 of the motor 31 is perpendicular to the central axis of the blowing and suction pipe 2. The rotation axis A is below the grip portion 11 and passes through the geometric center of the volute 33.

[0226] It should be understood that the angle formed by the air inlet 331 and the air outlet 332 of the volute 33 around the rotation axis A determines the angle through which the airflow generating device (volute 33) rotates when switching from the blowing mode to the suction mode or from the suction mode to the blowing mode. The angle is not limited to the 90 degrees described above. For example, the angle can be 90 degrees ± 20 degrees.

[0227] The inventors found out through experiments that, compared with the comparative example in which the volute cannot rotate and the blowing and suction pipes are separately arranged, the blowing and suction efficiency of the single-tube blowing and suction machine of this embodiment is improved by more than 20%.

[0228] In the single-tube blowing and suction machine 100 of this embodiment, compared with a solution such as replacing the blowing and suction tubes, the blowing and suction conversion can be achieved only by rotating the volute 33. Therefore, this embodiment significantly improves the user comfort of the human machine.

[0229] Furthermore, the single-tube blowing and sucking machine 100 may also include a garbage bag 7 as an example of a collection device connected to the fuselage 1. Specifically, the garbage bag 7 is connected to the air outlet 332 and is located below the fuselage 1, and is used to collect foreign matter flowing inward from the nozzle 22 of the blowing and sucking tube 2. The garbage bag 7 is at least partially made of breathable material, and is used to contain debris such as leaves sucked in by the blowing and sucking tube 2. The garbage bag 7 includes a main body 71, a shoulder strap 72, and a connection interface 73 for connecting to the air outlet 332 of the volute 33. The single-tube blowing and sucking machine 100 may also include a power plug 4 for supplying power through an AC power supply. However, the present invention is not limited to this, and the single-tube blowing and sucking machine 100 can also be powered by a DC power supply, such as a lithium battery.

[0230] The following describes a method for implementing the blowing-suction conversion of the single-tube blowing-suction machine 100 according to the present embodiment.

[0231] like Figure 1A As shown, when the air inlet 331 of the volute 33 is connected to the first end 21 of the blowing and suction pipe 2 and the air outlet 332 of the volute 33 is connected to the connection interface 73 of the garbage bag 7, the single-tube blowing and suction machine 100 is in the suction mode. The fan 32 rotates in the volute 33, and the rotation of the fan 32 draws the external airflow into the volute 33 through the blowing and suction pipe 2, and after being guided in the volute 33, it is blown into the garbage bag 7 by the air outlet 332, and the debris sucked in with the airflow is collected in the garbage bag 7.

[0232] from Figure 1A In the suction mode shown, the airflow generating device 3 (volute 33) is rotated 90 degrees relative to the body 1 and the blowing and suction pipe 2 in the direction indicated by the arrow P1, so that the single-tube blowing and suction machine 100 can enter the blowing mode.

[0233] like Figure 1BAs shown, in the blowing mode, the air inlet 331 of the volute 33 is in fluid communication with the air inlet 13 of the body 1, and the air outlet 332 of the volute 33 is in fluid communication with the first end 21 of the blowing and suction pipe 2. The fan 32 rotates in the volute 33, and the rotation of the fan 32 draws the external airflow into the volute 33 through the air inlet 13 of the body, and after being guided in the volute 33, the airflow is blown into the blowing and suction pipe 2 by the air outlet 332, and blown out from the second end 22 of the blowing and suction pipe 2.

[0234] from Figure 1B In the blowing mode shown, the airflow generating device (volute 33) is rotated 90 degrees relative to the body 1 and the blowing and suction pipe 2 in the direction indicated by the arrow P2 to enable the single-tube blowing and suction machine 100 to enter the suction mode. Figure 1A and Figure 1B As shown, the directions of arrows P1 and P2 are opposite.

[0235] In order to realize the rotation of the airflow generating device 3 relative to the body 1, the blowing and suction machine 100 further includes a blowing and suction conversion mechanism, which can operably drive the volute 33 to rotate around the rotation axis A between the blowing position in the blowing mode and the suction position in the suction mode. Specifically, when the volute 33 rotates from the blowing position to the suction position, the blowing and suction conversion mechanism can drive the first end 21 of the blowing and suction pipe 2 to engage and communicate with the air inlet 331, and when the volute 33 rotates from the suction position to the blowing position, the blowing and suction conversion mechanism can drive the first end 21 of the blowing and suction pipe 2 to be opposite to the air outlet 332.

[0236] like Fig.11 and 17 As shown, in order to facilitate the user to operate the volute 33 to rotate relative to the body 1 and the blowing and suction tube 2, the blowing and suction conversion mechanism includes an operating component 5 that can connect the rotating shaft A of the volute 33 to an example of a rotation drive part, and the volute 33 is driven to rotate relative to the body 1 and the blowing and suction tube 2 through the operating component 5. It should be understood that the motor 31 and the volute 33 can be fully or partially accommodated in the housing of the body 1. As long as the operating component 5 is exposed. It should be noted that the operating component here can be understood as an operating button in one example.

[0237] The following introduces the blowing and suction conversion mechanism under the first embodiment and the action process of the blowing and suction pipe and the volute during the blowing and suction conversion.

[0238] In this embodiment, if Figure 1A-1BAs shown, the blowing and suction conversion mechanism includes a lever 9. When the blowing and suction machine 100 switches from the suction mode to the blowing mode, the lever controls the first end 21 of the blowing and suction tube 2 to be disengaged from the air inlet 331, and drives the volute 33 to rotate relative to the main body shell 10 to the blowing position through the above-mentioned operating component. When the blowing and suction machine 100 switches from the blowing mode to the suction mode, the lever 9 controls the first end 21 of the blowing and suction tube 2 to be disengaged from the air outlet 332, and drives the volute 33 to rotate relative to the main body shell 10 to the suction position through the above-mentioned operating component 5.

[0239] Specifically, Figure 1A and Figure 1B As shown, the lever 9 is pivotally mounted to the body 1 via the pivot 14 at its middle position. A long hole 91 is formed at the first end of the lever 9, and the pivot 23 extending from the side wall of the blowing and suction pipe 2 is inserted into the long hole 91. The second end of the lever 9 is exposed from the body 1. In this way, the lever 9 can be rotated around the pivot 14 by moving the second end of the lever 9, thereby driving the first end 21 of the blowing and suction pipe 2 to move between a first position close to the airflow generating device 3 and a second position away from the airflow generating device (volute 33).

[0240] For example, in Figure 1A The suction mode is Figure 1B When switching to the blowing mode, first, pull the second end of the lever 9 to move the first end 21 of the blowing and suction pipe 2 away from the volute 33 and disengage from the air inlet 331 of the volute 33 (that is, the blowing and suction pipe 2 is in the second position); then, use the operating component 5 to rotate the air flow generating device (volute 33) to align the air outlet 332 of the volute 33 with the first end 21 of the blowing and suction pipe 2; finally, push the second end of the lever 9 to move the first end 21 of the blowing and suction pipe 2 toward the volute 33 and face the air outlet 332 of the volute 33.

[0241] In this embodiment, at least part of the blowing and suction pipe 2 is slidably connected to the blowing and suction pipe connection portion 12 of the body 1. Specifically, the inner cavity of the blowing and suction pipe 2 provides a channel for airflow. In one embodiment, the blowing and suction pipe 2 can be formed by combining multiple sections to form a blowing and suction pipe 2 with complete blowing or suction functions. Figures 9-10, the blowing and suction pipe 2 includes a first sub-blowing and suction pipe 26 away from the airflow generating device 3 and a second sub-blowing and suction pipe 27 close to the airflow generating device 3, the second sub-blowing and suction pipe 27 is operable to be displaced in the axial direction, and the second sub-blowing and suction pipe 27 has a first position close to the airflow generating device 3 and a second position away from the airflow generating device 3. The above-mentioned lever 9 controls the second sub-blowing and suction pipe 27 to move to the first position or controls the second sub-blowing and suction pipe 27 to move to the second position. It is easy to understand that when the blowing and suction machine 100 switches between the blowing mode and the suction mode, the first sub-blowing and suction pipe 26 does not move relative to the fuselage 1, and only the second sub-blowing and suction pipe 27 is slidably connected to the blowing and suction pipe connecting portion of the fuselage 1. In other words, in this embodiment, when the blowing and suction machine 100 is in the blowing mode or the suction mode, the axial distance between the front end of the blowing and suction pipe 2 (which can be understood as the front end of the pipe mouth 22) and the rotation axis A remains unchanged. More specifically, in the blowing mode, when the second sub-blowing and suction pipe 27 is in the first position, the second sub-blowing and suction pipe 27 is opposite to the air outlet 332, and in the suction mode, when the second sub-blowing and suction pipe 27 is in the first position, the second sub-blowing and suction pipe 27 is connected to the air inlet 331.

[0242] It should be noted that the second sub-blowing and suction pipe 27 here can also be understood as not being a part of the blowing and suction pipe 2, but an independent structure. For example, in some embodiments, the blowing and suction pipe 2 can also be fixedly connected to the fuselage 1, and the fuselage also includes an adapter (not shown), the adapter is connected to the blowing and suction pipe 2, and the adapter can move relative to the blowing and suction pipe 2 between a first position close to the flow generating device (volute 33) and a second position away from the airflow generating device (volute 33), and the adapter can be driven by a structure similar to the above-mentioned lever 9. The following is a specific description of the lever 9 driving the adapter to move at different positions as an example. In the suction mode, the air inlet 331 of the volute 33 is socketed with the adapter to achieve sealing. In the blowing mode, the air outlet 332 of the volute 33 is engaged with the adapter to suppress the shaking of the blowing and suction pipe 2. When switching from the suction mode to the blowing mode, the adapter is moved to the second position away from the volute 33 to disengage the air inlet 331 of the volute 33; then, the airflow generating device (volute 33) is rotated to align the air outlet 332 of the volute 33 with the adapter; finally, the second end of the lever 9 is pushed to move the adapter toward the first position close to the volute 33 to engage with the air outlet 332 of the volute 33. When switching from the blowing mode to the blowing mode, the adapter is moved to the second position away from the volute 33 to disengage the air outlet 332 of the volute 33; then, the airflow generating device (volute 33) is rotated to align the air inlet 331 of the volute 33 with the adapter; finally, the second end of the lever 9 is pushed to move the adapter toward the first position close to the volute 33 to engage with the air inlet 331 of the volute 33. Through the above arrangement, on the one hand, the rotating airflow generating device (volute 33) can also be switched between the blowing and suction modes, and in the blowing mode, the blowing and suction pipe 2 and the air outlet part 332 of the volute 33 can be fixed to prevent the blowing and suction pipe 2 from shaking; on the other hand, in the suction mode, the sealing between the blowing and suction pipe 2 and the air inlet part 331 of the volute 33 can also be achieved, so that the debris sucked in the suction mode can smoothly pass through the blowing and suction pipe 2 and the volute 33 and enter the garbage bag smoothly.

[0243] Of course, when the airflow generating device 3 switches between the blowing and suction modes, it can also directly link the second sub-blowing and suction pipe 27 or the adapter to move from the first position to the second position. The specific structure and movement process of the linkage will be described in detail below.

[0244] Refer to the following FIG. 3A to FIG. 4F and Figures 11 to 16 The blowing and suction conversion mechanism in the second embodiment and the action process of the blowing and suction pipe 2 and the volute 33 during the blowing and suction conversion are introduced.

[0245] In the first embodiment, the rotation of the airflow generating device 3 (volute 33) and the axial movement of the blowing and suction pipe 2 are performed independently of each other. In this embodiment, the blowing and suction conversion mechanism is a linkage device 7. The linkage device 7 can drive the first end 21 of the blowing and suction pipe 2 and the air inlet 331 or the air outlet 332 of the volute 33 away from a preset distance, and can link the volute 33 to rotate relative to the main body housing 10 to the blowing position in the blowing mode or to the suction position in the suction mode. When the volute 33 rotates from the blowing position to the suction position, the linkage device 7 can link the first end 21 of the blowing and suction pipe 2 to be opposite to the air inlet 331, and when the volute 33 rotates from the suction mode to the blowing mode, the linkage device 7 can link the first end 21 of the blowing and suction pipe 2 to be opposite to the air outlet 332.

[0246] It should be noted that "the linkage device 7 can drive the first end 21 of the blowing and suction pipe 2 to be away from the air inlet 331 or the air outlet 332 of the volute 33" The preset distance here can be understood as the first end 21 of the blowing and suction pipe 2 being completely separated from the air inlet 331 or the air outlet 332 of the volute 33, and can also be understood as the end face of the first end 21 of the blowing and suction pipe 2 being at least partially attached to the end face of the air inlet 331 or the air outlet 332 of the volute 33, and the first end 21 of the blowing and suction pipe 2 and the end face of the air inlet 331 or the air outlet 332 of the volute 33 do not overlap in a direction perpendicular to the axial direction.

[0247] The linkage device 7 is used to link the rotation of the airflow generating device (volute 33) and the axial movement of the blowing and suction pipe 2, thereby simplifying the blowing and suction conversion operation. Specifically, the linkage device 7 can drive the first end 21 of the blowing and suction pipe 2 to move axially relative to the airflow generating device 3, and can link the airflow generating device 3 to rotate relative to the fuselage 1 to the blowing position in the blowing mode or to the suction position in the suction mode. In the blowing mode, the linkage device 7 can link the first end 21 of the blowing and suction pipe 2 to be connected with the air outlet 332; in the suction mode, the linkage device 7 can link the first end 21 of the blowing and suction pipe 2 to be connected with the air inlet 331. In the process of the linkage device 7 driving the airflow generating device 3 to rotate, the motor 31 can be in a state of driving the fan 32 to rotate.

[0248] In this embodiment, the same reference numerals are used for the same components as those in the first embodiment, and detailed description of these components is omitted. Figure 3A and Figure 3B Part of the structure of the single-tube blowing and suction machine is omitted.

[0249] Refer to the following FIG. 3A to FIG. 4F and Figures 11 to 16 The structure of the volute 3 linkage according to the present embodiment will be described.

[0250] The linkage device 7 of this embodiment includes a connecting rod 25 , a rotating disk 16 , a protruding rod 17 extending from the rotating disk 16 , and a linkage member 73 .

[0251] One end of the connecting rod 25 is connected to the first end 21 of the blowing and suction pipe 2 via a pivot 24, and the pivot 24 also passes through the body 1, in particular, through a guide rail (or guide groove) 15 formed on the blowing and suction pipe connecting portion 12. The guide rail 15 extends along the axial direction of the blowing and suction pipe 2 to guide the axial movement of the pivot 24. When the pivot 24 moves axially relative to the guide rail 15, the blowing and suction pipe 2 is driven to move axially relative to the body 1. The other end of the connecting rod 25 is connected to the peripheral hole 163 on the outer periphery of the rotating disk 16 through a pivot.

[0252] The turntable 16 is rotatably mounted to the body 1 via a pivot B. The turntable 16 includes a convex arc surface (outer peripheral surface) 161 and a notch 162 that is concave radially inward from the arc surface 161. It should be understood that the notch 162 may extend only over a portion of the thickness of the turntable 16, or may extend over the entire thickness of the turntable 16 (see FIG. Figures 4A to 4F ).

[0253] The first end of the protruding rod 17 is fixed to the rotating disk 16, and the second end of the protruding rod 17 extends out of the periphery of the rotating disk 16 from the position of the notch 162. The second end of the protruding rod 17 can be connected to a pivot (or a pivot and a roller) 171.

[0254] The linkage member 73 is fixedly connected to the volute 33 by a pin A1. The linkage member 73 includes a concave arc-shaped first sliding surface 731, a concave arc-shaped second sliding surface 732, and a slot 733 located between the two sliding surfaces 731 and 732. The slot 733 can accommodate the pivot 171 of the second end of the protruding rod 17. The arm portion of the linkage member 73 with the slot 733 formed therein can extend into the notch 162 of the rotating disk 16 without interfering with the rotation of the rotating disk 16. The first sliding surface 731 and the second sliding surface 732 match the arc surface 161 of the rotating disk 16. Figure 4A , when the blowing and suction machine 100 is in the blowing mode, the arc surface 161 of the rotating disk 16 is opposite to the first sliding surface 731; Figure 4D When the airflow generating device 3 is switched to the suction mode, the arc surface 161 of the rotating disk 16 is opposite to the second sliding surface 732 .

[0255] Reference Figure 3A and Figure 3B, a bent portion 251 may be formed near the second end of the connecting rod 25 connected to the turntable 16, so that the pivot B protruding from the turntable 16 does not affect the movement of the connecting rod 25. After the pivot B extends from the fuselage 1, it can be connected to the corresponding operating component 5, thereby driving the turntable 16 to rotate. Specifically, the turntable 16 is arranged between the airflow generating device 3 and the operating component 5. The pivot B is specifically an anti-rotation plug 164 extending in the direction of the operating component 5, and the anti-rotation plug 164 is at least partially set to a flat square structure, and the anti-rotation plug is embedded with a threaded structure 1641 in the left and right directions.

[0256] It should be understood that another pin extending out of the body 1 may be provided at an eccentric position where the turntable 16 does not interfere with the connecting rod 25. In this case, an arc groove for the other pin to rotate through may be formed on the body 1. In this solution, the pivot B does not need to protrude from the surface of the turntable 16 close to the connecting rod 25, and the connecting rod 25 does not need to have the above-mentioned bent portion 251.

[0257] Refer to the following Figures 3A to 4F and Figures 11 to 16 The operation process of the linkage device according to this embodiment will be described.

[0258] 4A to 4F The figure shows the conversion process from the blowing mode of the blower-vacuum machine to the suction mode of the blower-vacuum machine. Figure 3B and Figure 4A As shown, in the blowing mode, the first end 21 of the blowing and suction pipe 2 is connected to the air outlet 332 of the volute 33, the pivot 24 installed on the blowing and suction pipe 2 is near the end of the guide rail 15 close to the volute 33, the first sliding surface 731 of the linkage 73 is in sliding contact with the arc surface 161 of the turntable 16, and the pivot 171 of the protruding rod 17 is separated from the slot 733.

[0259] The turntable 16 is rotated clockwise from this state, the pivot 24 (blowing and suction tube 2) moves axially away from the volute 33, the first sliding surface 731 of the linkage member 73 slides relative to the arc surface 161 of the turntable 16, and the linkage member 73 (volute 33) does not move.

[0260] like Figure 4B As shown, in Figure 4A After the state shown is rotated by a certain angle, the pivot 24 moves away from the end of the guide rail 15 close to the volute 33 (i.e., the pivot 24 moves axially forward), the blowing and suction tube 2 is separated from the volute 33, and the pivot 171 of the protruding rod 17 begins to engage with the slot 733 of the linkage member 73. At least before this, the linkage member 73 is positioned by the cooperation of the arc surface 161 of the rotating disk 16 and the first sliding surface 731 of the linkage member 73, which ensures that the pivot 171 of the protruding rod 17 can reliably engage with the slot 733 of the linkage member 73.

[0261] It should be understood that the width of the slot 733 can be made slightly larger than the diameter of the pivot 171 , thereby facilitating the pivot 171 to enter the slot 733 and preventing the pivot 171 from getting stuck in the slot 733 .

[0262] Afterwards, if Figure 4C As shown, the rotating disk 16 continues to rotate, the pivot 24 moves to the limit position of the end of the guide rail 15 away from the volute 33, and the protruding rod 17 drives the linkage member 83 to rotate, thereby rotating the volute 33.

[0263] In this embodiment, from Figure 4A Status to Figure 4D In the state, the linkage 83 (volute 33) rotates 90 degrees. Figure 4D As shown, the pivot 171 of the protruding rod 17 begins to disengage from the slot 733 of the linkage member 73. The arc surface 161 of the rotating disk 16 matches the second sliding surface 732 of the linkage member 73, and the rotating disk 16 inhibits the rotation of the linkage member 73. Figure 4D In the state shown, the air inlet portion 331 of the volute 33 is aligned with the first end 21 of the blowing and suction pipe 2 .

[0264] like Figure 4E As shown, the turntable 16 continues to rotate in the clockwise direction, and the pivot 24 at the first end of the connecting rod 25 drives the blowing and suction pipe 2 to approach the volute 33 so that the first end 21 of the blowing and suction pipe 2 begins to engage with the air inlet 331 of the volute 33. At this time, the linkage 83 (volute 33) does not rotate.

[0265] Reference Figure 4F and Figure 3A As shown, the turntable 16 rotates in the clockwise direction to the final position, the pivot 24 moves to the extreme position of the guide rail 15 close to one end of the volute 33, the blowing and suction pipe 2 is completely sealed and engaged with the air inlet part 331 of the volute 33, and the single-tube blowing and suction machine 100 is in the suction state.

[0266] The above describes the process of switching the blower-vacuum machine 100 from the blowing mode to the suction mode. FIG. 4F to FIG. 4A The blower-suction machine 100 can be switched from the suction mode to the blowing mode by rotating the turntable 16 in a counterclockwise direction.

[0267] As described above, the connecting rod 25 and the rotating disk 16 in the linkage device in this embodiment constitute a crank-connecting rod mechanism, which can convert the rotation of the rotating disk 16 into the axial movement of the blowing and suction pipe 2. The rotating disk 16, the protruding rod 17 and the linkage member 73 in the linkage device in this embodiment constitute a sheave mechanism, which can convert the continuous rotation of the rotating disk 16 into the intermittent rotation of the linkage member 73 (volute 33). In this embodiment, the crank-connecting rod mechanism and the sheave mechanism are integrated together, thereby providing a linkage device with a simple structure.

[0268] As described above, the linkage member 73 includes two movement processes. When the linkage member 73 slides relative to the arc surface 161 of the rotating disk 16, the position of the linkage member 73 remains unchanged; when the linkage member 73 engages with the protruding rod 17, the linkage member 73 rotates at an angle of 90 degrees. 4A to 4F , the rotation angle of the turntable 16 is greater than the rotation angle of the linkage 73 (volute 33) and is less than or equal to 360 degrees.

[0269] Compared with the first embodiment in which the blowing and suction tube 2 is separated from the volute 33 by pushing the lever 9, the volute 33 is rotated, and finally the blowing and suction tube 2 is engaged with the volute 33 by pushing the lever 9 again, in the present embodiment, the blowing and suction conversion of the blowing and suction machine can be achieved only by rotating the turntable 16, and the human-machine comfort is further improved.

[0270] Furthermore, since the weight of the motor 31 accounts for a large part of the weight of the entire airflow generating device 3, in order to prevent the airflow generating device 3 from accidentally rotating to the blowing position along the arrow P1 due to the heavy weight of the motor 31 when the airflow generating device 3 rotates to the suction position, and to prevent the airflow generating device 3 from rotating due to accidental touch or other unexpected situations during operation, thereby affecting the user's use. In this embodiment, the linkage device 7 also includes a locking mechanism 71 that can limit the airflow generating device 3 to the blowing position or the suction position.

[0271] like Fig.11 As shown, in the left-right direction, the locking mechanism 71 is disposed between the operating assembly 5 and the main body housing 10 .

[0272] like Figures 11 to 16 As shown, the operating assembly 5 includes a handwheel 51 with a recessed receiving chamber 50, a base 52 disposed in the receiving chamber 50 of the handwheel 51 and protruding toward the direction of the airflow generating device 3, a pressing member 53 at least partially received in the handwheel 51, and a limiting member 54 sleeved on the periphery of the base 52 and limiting the disengagement of the locking mechanism 71. The base 52 is a columnar structure, and the base 52 and the handwheel 51 are integrally arranged. The base 52 is provided with an anti-rotation plug interface 521 extending in the left and right directions, and the anti-rotation plug interface 521 is a flat square groove adapted to the anti-rotation plug 164 of the flat square structure. In this embodiment, the anti-rotation plug 164 on the turntable 16 is received in the flat square groove to prevent the handwheel 51 and the turntable 16 from rotating relative to each other when the handwheel 81 drives the turntable 16 to rotate. Furthermore, the outer surface of the hand wheel 51 is also provided with a through hole 510 communicating with the flat square groove, and the through hole 510 is used for the screw 55 to be inserted and threadedly fastened with the thread structure 1641 on the anti-rotation plug 164.

[0273] Specifically, refer to Fig.11 , 13~15, the locking mechanism 71 includes a locking member 711 and an elastic member 712. The locking member 711 is at least partially located in the receiving chamber 50 of the operating component 5, and includes a base 713, a matching portion 714 provided on the base 713, and a locking pin 715 located at the free end of the base 713. The main body housing 10 is provided with a groove 101 that can be locked with the locking pin 715 of the locking mechanism 71 to lock the blower-vacuum machine 100 in the corresponding working mode. Specifically, the groove 101 includes a first groove 1011 that can be locked with the locking pin 715 to lock the blower-vacuum machine 100 in the blowing mode, and a second groove 1012 (such as a second groove 1012) that locks the blower-vacuum machine 100 in the suction mode. Fig.11 In this embodiment, the first groove 1011 and the second groove 1012 are arranged opposite to each other.

[0274] like Figures 11-12 , Figures 14-15 as well as Fig.16As shown, in this embodiment, the pressing member 53 includes a first button 531 and a second button 532 pivotally connected to the base 52 and symmetrically arranged. The first button 531 and the second button 532 are at least partially accommodated in the accommodating chamber 50. The first button 531 and the second button 532 both include an exposed pressing portion 533 for the operator to press, an actuating portion 534 extending into the accommodating chamber 50 of the operating component 5, and a sliding portion 535 that is limitedly matched with the limiting member 54. The actuating portion 534 contacts the matching portion 714, so that when the first and second buttons 531 and 532 are pressed, the actuating portion 534 can move relative to the main body housing 10 and push the matching portion 714 of the locking mechanism 71, so that the locking pin 715 moves in a direction away from the first groove 1011 or the second groove 1012, so that the operating component 5 can drive the airflow generating device 3 to rotate through the rotating disk 16. Specifically, when the blower-vacuum machine 100 needs to switch from the suction mode to the blowing mode, the operating component 5 can move a preset distance relative to the main body housing 10 under the action of external force to drive the locking mechanism 71 to compress the elastic member 712 and separate it from the first groove 1011 of the main body housing 10, and then drive the airflow generating device 3 to rotate from the suction position to the blowing position through the operating component 5, and finally release the operating component 5, and the elastic member 712 causes the locking pin 715 to lock into the second groove 1012. Among them, the elastic member 712 abuts between the locking mechanism 71 and the operating component 5, and more specifically, the elastic member 712 abuts between the locking mechanism 71 and the limiting member 54, providing the locking mechanism 71 with a restoring force to drive the locking pin 715 to lock with the second groove 1012. Similarly, when the blower-vacuum machine 100 needs to switch from the blowing mode to the suction mode, the operating component 5 can move a preset distance relative to the main body shell 10 under the action of external force to drive the locking mechanism 71 to compress the elastic member 712 and separate it from the second groove 1012 of the main body shell 10, and then drive the airflow generating device 3 to rotate from the blowing position to the suction position through the operating component 5, and finally release the operating component 5, and the elastic member 712 prompts the locking pin 715 to lock into the first groove 1011.

[0275] More specifically, a mating surface 7140 is formed on one side of the mating portion 714 facing the actuating portion 534, and the mating surface 7140 is an inclined slope. When the blower-vacuum machine 100 is in the suction mode, during the pressing of the first and second buttons, the actuating portion 534 moves downward along the inclined mating surface 7140, and drives the mating portion 714 to move toward the base 52 to disengage from the second groove 1012, and the elastic member 712 is in a compressed state. At this time, if the operating assembly 5 continues to be rotated to the blowing position, the first and second buttons 531, 532 are released, and the elastic member 712 is in a released state, and the released elastic member 712 drives the locking pin 715 to engage with the first groove 1011.

[0276] It can be understood that in this embodiment, the pressing member 53 is provided with two buttons. Of course, in some other embodiments, the pressing member 53 can also be provided with one button. In order to prevent the two buttons from being excessively released when the locking mechanism 71 is locked with the first groove 1011 or the second groove 1012, in this embodiment, the limiting member 54 is further provided with at least two limiting teeth 541 in the extending direction of the through hole, and the sliding portion 535 of the button 5 is limited between the two limiting teeth 541 to move a preset distance between the two limiting teeth 541. In addition, the limiting member 54 also includes two opposing hooks 542, and the two hooks 542 cooperate with the base 713 of the locking mechanism 71 to prevent the locking mechanism 71 from being separated from the hand wheel 51 in the left and right directions.

[0277] Next, the operation process of the garbage bag 7 during the switching between blowing and suction will be described.

[0278] In one example, in the suction mode, the air outlet 332 of the volute 33 is sealed and connected to the connection interface 73 of the garbage bag 7. In an optional scheme, the garbage bag 3 is movably mounted to the fuselage 1. When switching from the suction mode to the blowing mode, the garbage bag 3 can be first moved away from the rotation axis A; then, the airflow generating device (volute 33) is rotated to the blowing mode. When switching from the blowing mode to the suction mode, first, the airflow generating device (volute 33) is rotated to the suction mode, and then, the garbage bag 3 is moved toward the rotation axis A, so that the connection interface 32 of the garbage bag 3 is sealed and connected to the air outlet 332 of the volute 33. Of course, the present invention is not limited to this.

[0279] The connection method between the air inlet 331 and the air outlet 332 of the volute 33 and the blowing and suction pipe 2 is further described below.

[0280] In the suction mode, the air inlet 331 of the volute 33 is sleeved with the first end 21 of the blowing and suction pipe 2 to achieve sealing. In the blowing mode, the fixed portion outside the air outlet 332 of the volute 33 is clamped with the first end 21 of the blowing and suction pipe 2 to prevent the blowing and suction pipe 2 from shaking.

[0281] Reference Figures 1A to 2BIn this embodiment, the cross-sectional area of ​​the air flow passage of the air inlet portion 331 of the volute 33 in the direction perpendicular to the air inlet direction thereof is greater than the cross-sectional area of ​​the air flow passage of the air outlet portion 332 in the direction perpendicular to the air outlet direction thereof. For example, when the air inlet portion 331 and the air outlet portion 332 are both roughly tubular, the inner diameter of the air inlet portion 331 is greater than the inner diameter of the outlet portion 82. Since the air inlet 3310 (inner diameter) of the air inlet portion 331 is relatively large, a relatively large air suction volume can be achieved in the suction mode, and it is convenient for debris such as leaves to enter the volute 33 from the blowing and suction pipe 2 and the air inlet portion 331, and enter the garbage bag 3 after being broken by the fan 32. Since the air outlet 3320 (inner diameter) of the air outlet portion 332 is relatively small, a relatively large air outlet speed can be obtained in the blowing and suction pipe 2 in the blowing mode, thereby obtaining a relatively large blowing force.

[0282] Reference Figure 2A , the inner diameter of the air inlet 331 matches the outer diameter of the first end 21 of the blowing and suction pipe 2, so that in the suction mode, the air inlet 331 is fitted over the first end 21 of the blowing and suction pipe 2. The present invention is not limited to the inner diameter of the air inlet 331 matching the outer diameter of the first end 21 of the blowing and suction pipe 2. The outer diameter of the air inlet 331 can also match the inner diameter of the first end 21 of the blowing and suction pipe 2.

[0283] Reference Figure 2B The air outlet portion 332 includes an inner tube 3321 and an outer fixing portion 3322 that are arranged approximately coaxially. The inner tube 3321 and the outer fixing portion 3322 are connected to each other at their base ends, i.e., at the connecting portion 3324, so that a slot 3323 extending approximately along the circumferential direction and axial direction of the blowing and suction pipe 2 is defined between the inner tube 3321 and the outer fixing portion 3322. The outer diameter of the inner tube 3321 is smaller than the inner diameter of the first end 21 of the blowing and suction pipe 2. In the blowing mode, the inner tube 3321 is accommodated in the first end 21 of the blowing and suction pipe 2. The outer fixing portion 3322 can be arranged in a plurality of parts in a circumferential direction of the blowing and suction pipe 2, and the inner peripheral shape of the outer fixing portion 3322 matches the outer peripheral shape of the first end 21 of the blowing and suction pipe 2, so that in the blowing mode, the outer fixing portion 3322 is externally connected to the first end 21 of the blowing and suction pipe 2. The position of the first end 21 of the blowing and suction pipe 2 can be defined by the connecting portion 3324, but is not limited to it.

[0284] The present invention is not limited to the outer diameter of the outer fixing portion 3322 matching the first end 21 of the blowing and suction pipe 2. The outer fixing portion 3322 may also match the inner diameter of the first end 21 of the blowing and suction pipe 2. In this case, a step may be formed at the outer fixing portion 3322, and the step may abut against the first end 21 of the blowing and suction pipe 2, thereby achieving axial positioning of the blowing and suction pipe 2 in the blowing mode. Of course, the axial positioning method of the blowing and suction pipe 2 is not limited thereto.

[0285] The connecting portion 3324 preferably does not extend over the entire circumference of the blowing-suction pipe 2 , which ensures that the annular space between the first end 21 of the blowing-suction pipe 2 and the inner pipe 3321 is in fluid communication with the interior of the fuselage 1 and the exterior of the volute 33 .

[0286] Furthermore, the cross-sectional area of ​​the inner tube 3321 in the direction perpendicular to the air outlet direction is smaller than the cross-sectional area of ​​the first end 21 of the blowing and suction pipe 2 in the direction perpendicular to the air outlet direction. In this embodiment, the inner tube 3321 extends into the first end 21 of the blowing and suction pipe 2, and there is an area between the inner tube 3321 and the first end 21 that is in communication with the external air. In the blowing mode, due to the Bernoulli effect, the external air is sucked into the blowing and suction pipe 2 through this area under the action of the airflow passing through the inner tube 3321, thereby increasing the air volume of the blowing and suction machine 100 in the blowing mode.

[0287] It should be understood that in the blowing mode, the inner tube 3321 does not necessarily have to extend into the first end 21 of the blowing and suction tube 2. The inner tube 3321 can also be separated from the first end 21 of the blowing and suction tube 2 by a distance along the extension direction of the blowing and suction tube 2, or the port of the inner tube 3321 and the port of the first end 21 can be flush, that is, approximately in the same plane.

[0288] In the above description, for simplicity, the relationship between the components is described in the state where the blowing and suction pipe 2 is arranged horizontally. However, it should be understood that when in use, the blowing and suction pipe 2 is usually inclined relative to the horizontal direction.

[0289] Second embodiment

[0290] Refer to the following Figure 5 A second embodiment of the present invention will be described.

[0291] In the first embodiment, the air inlet portion 13 of the fuselage is located below the grip portion 11. However, the present invention is not limited thereto.

[0292] For example, in this embodiment, the air inlet portion 13 of the fuselage includes: an air inlet passage 132 located below the grip portion 11; an opening 130 located at one end of the air inlet passage 132, and an outlet 133 located at the other end of the air inlet passage 132. The opening 130 is located at the front side of the grip portion 11, that is, the opening direction of the opening 130 is substantially consistent with the extension direction of the blowing and suction pipes; in the blowing mode, the air intake enters the volute 33 through the air inlet portion 13 of the fuselage generally along the arrow 13A.

[0293] In this embodiment, the opening 130 of the air inlet 13 of the body opens toward the front side of the body 1, and compared with the case where the opening of the air inlet 13 of the body is located below the grip 11, the opening 130 is less likely to be blocked by the hand gripping the grip 11. In addition, the opening 131 or the airflow at the opening 131 is away from the user's ears, so the noise felt by the user can be reduced.

[0294] Of course, the opening 130 of the air inlet portion 13 of the fuselage body can be located in any direction except toward the grip portion 11 , and there can be multiple air inlets.

[0295] Third embodiment

[0296] Refer to the following FIG. 6A to FIG. 6C A third embodiment according to the present invention will be described.

[0297] Reference Figure 1A In the suction mode, the output shaft of the motor 31 is parallel to the central axis of the blowing and suction pipe 2, and the motor 31 and the rotation axis A are located at approximately the same height. Figure 1B In the blowing mode, the output shaft of the motor 31 is perpendicular to the central axis of the blowing and suction tube 2, and the motor body 311 is located below the rotation axis A.

[0298] Generally, the weight of the motor 31 accounts for a large part of the weight of the entire airflow generating device 3. Figure 1A The suction pattern shown is Figure 1B When the blowing mode is switched, the center of gravity of the motor 31 drops, and the switch can be performed more easily. Figure 1B The blowing pattern shown is Figure 1A When the suction mode is switched, the center of gravity of the motor 31 rises, and a greater force is required to rotate the airflow generating device 3 to Figure 1A The present embodiment is designed to solve the problem of requiring a large twisting force when switching from the blowing mode to the suction mode.

[0299] Reference FIG. 6A to FIG. 6C , the airflow generating device 3 includes a rotating shaft A2 corresponding to the rotating shaft A in the first embodiment, and the rotating shaft A2 is fixedly connected to the volute 33. The airflow generating device 3 also includes a conversion assisting device 8. The conversion assisting device includes a torsion spring 84, a torsion spring limiting portion 18 and a pressing portion 85. As described in detail below, the conversion assisting device accumulates energy to resist the torque around the rotating shaft A2 applied by the gravity of the motor 31 or the entire airflow generating device 3, and the accumulated energy can assist the airflow generating device 3 to rotate in a direction opposite to the rotation direction around the rotating shaft A2 applied by the gravity of the airflow generating device.

[0300] Reference Fig. 6A, a boss A21 for mounting a torsion spring 84 is provided at a position coaxial with the rotation axis A2 on the outer wall of the volute 33. A coil 843 of the torsion spring 84 is mounted around the boss A21. A first arm 841 and a second arm 842 of the torsion spring 84 extend from the coil 843. A pressing portion 85 formed around the boss A21 is provided on the outer wall of the volute 33. The pressing portion 85 is in the form of a substantially C-shaped rib and includes a first end 851 and a second end 852. At least the coil 843 of the torsion spring 84 is disposed between the pressing portion 85 and the boss A21. A torsion spring stopper 18 is provided around the pressing portion 85 on the shell of the fuselage 1. The torsion spring stopper 18 is also substantially C-shaped, and in the illustrated example, the angle over which the torsion spring stopper 18 extends (covered by the C-shaped structure) is greater than the angle over which the pressing portion 85 extends. The torsion spring stopper 18 has a first end 181 and a second end 182. Preferably, the pressing portion 85 and the torsion spring limiting portion 18 are arranged coaxially with the rotation axis A2.

[0301] Fig. 6A The blower-vacuum machine is shown in the suction mode. Figure 6C The blower-vacuum machine is shown in the blowing mode. Figure 6B The blower-vacuum machine is shown in an intermediate state between the blowing mode and the suction mode. For example, when switching from the suction mode to the blowing mode, the volute 33 rotates 90 degrees. Figure 6B The state shown may be a state of being rotated approximately 45 degrees from the blowing mode or the suction mode.

[0302] exist Fig. 6A In the blowing mode shown, the first end 181 and the second end 182 of the torsion spring limiting portion 18 respectively limit the positions of the first arm 841 and the second arm 842 of the torsion spring 84. The torsion spring 84 is in a free state or slightly compressed (i.e., the first arm 841 and the second arm 842 are close to each other from the free state of the torsion spring 84). The first end 851 of the pressing portion 85 is in contact with the first arm 841 of the torsion spring 84, and the second end 852 of the pressing portion 85 is separated from the second arm 842 of the torsion spring 84.

[0303] In from Fig. 6A The suction mode shown switches to Figure 6C In the blowing mode shown, the volute 33 (pressing portion 85) needs to be around Fig. 6A Rotate 90 degrees clockwise. Figure 6B As shown, when the volute 33 (pressing portion 85) rotates about 45 degrees, the first end 851 of the pressing portion 85 is separated from the first arm 841 of the torsion spring 84, and the second end 852 of the pressing portion 85 begins to abut against the second arm 842 of the torsion spring 84. Figure 6B The intermediate state shown is further Figure 6CWhen the blowing mode is switched, the volute 33 (pressing portion 85) further rotates in the clockwise direction, and the pressing portion 85 compresses the torsion spring 84, thereby accumulating energy in the torsion spring 84. At this time, the compression state of the torsion spring 84 is limited by the first end 181 of the torsion spring stopper 18 and the second end 852 of the pressing portion 85.

[0304] Since the suction mode (refer to Figure 1A ) to the blowing mode (refer to Figure 1B ), the center of gravity of the motor 31 is lowered, so the gravity of the motor 31 can be used to compress the torsion spring 84. In this way, during the conversion from the suction mode to the blowing mode, the volute 33 will not be suddenly rotated quickly under the action of the gravity of the motor 31, so that the conversion process becomes natural. It should be understood that the direction of the torque (or rotation) around the rotation axis A2 applied by the gravity of the motor 31 or the entire airflow generating device is consistent with the direction of the rotation that compresses the torsion spring 84 or accumulates energy in the torsion spring 84.

[0305] In from Figure 6C The blowing state shown is Fig. 6A When the suction state is changed, the volute 33 (pressing portion 85) moves along Figure 6C At this time, the compressed torsion spring 85 releases its stored energy, pushing the pressing part 85 (volute 33) to rotate from the blowing state to the suction state. In other words, the potential energy of the torsion spring 85 offsets part of the gravity of the motor 31, thereby reducing the force that the user needs to apply to raise the motor 31 (airflow generating device), making the transition from the blowing state to the suction state smoother.

[0306] It should be understood that the main purpose of this embodiment is to assist the rotation of the airflow generating device by the potential energy accumulated in the torsion spring 84, so that the blowing and sucking conversion can be carried out more smoothly. Under the guidance of the present invention, those skilled in the art can also think of other embodiments. For example, the boss A21 can be set or formed on the rotating shaft A2 or the shell of the fuselage 8 instead of being set on the volute. For example, the potential energy generated by the stretching or compression of the coil spring installed between the shell of the fuselage 1 and the airflow generating device can be used to assist the rotation of the airflow generating device. Therefore, the elastic element serving as the energy storage part can be, for example, a torsion spring or a coil spring.

[0307] It should be understood that the torsion spring limiting portion 18 does not have to be a C-shaped structure, as long as it has a first limiting portion 181 and a second limiting portion 182 for limiting the first arm 841 and the second arm 842 of the torsion spring 84 .

[0308] Since the first arm 841 of the torsion spring 84 is limited by the first limiting portion 181, the pressing portion 85 does not need to be a C-shaped structure, as long as it has a first pressing portion 852 that can press the second arm 842 of the torsion spring 84 as the volute 33 rotates. Fig. 6A The suction pattern shown is Figure 6C When the blowing mode is switched, the pressing portion 85 can press the second arm 842 of the torsion spring 84 as soon as the volute 33 starts to rotate. At this time, the second arm 842 of the torsion spring 84 in the suction mode can be limited by the first pressing portion (852) of the pressing portion 85. Therefore, the second limiting portion 182 of the torsion spring limiting portion 18 can be omitted.

[0309] The above embodiment mainly uses the torsion spring to assist the rotation of the airflow generating device, so that the blowing and sucking conversion can be carried out more smoothly. Of course, the conversion assisting device 8 can also be a tension spring 80. Specifically, Figures 17-18 As shown, the tension spring 80 includes a first holding portion 801 connected to the body 1, a second holding portion (not shown) connected to the airflow generating device 3, and an elastic portion 803 connected between the first holding portion 801 and the second holding portion 802, and the elastic portion 803 is configured as a spiral spring. When the blower-vacuum machine is in the blowing mode, the elastic portion 803 is in a stretched state. When the blower-vacuum machine 100 switches from the blowing mode to the suction mode, the elastic portion 803 uses its restoring force and cooperates with the blowing-vacuum conversion mechanism to drive the airflow generating device 3 to rotate.

[0310] Fourth embodiment

[0311] Refer to the following Figure 7 A fourth embodiment according to the present invention will be described.

[0312] The present embodiment focuses on the relevant dimensions of the volute 33 , aiming to achieve miniaturization of the volute 33 .

[0313] Figure 7 is along the rotation axis A of the volute 33 (refer to Figure 1A , 1B ) is a cross-sectional view of the volute 33 taken in the air outlet direction of the air outlet portion 332 (inner tube 821), and the first end 21 of the blowing and suction pipe 2 is also shown in the figure.

[0314] The volute 33 is one of the core components of the fan, especially the centrifugal fan, and its function is to concentrate the gas of the centrifugal impeller, guide it to the air outlet 3320 of the volute 33, that is, the air outlet 332, and convert part of the dynamic pressure of the gas into static pressure. The volute 33 includes a spiral portion 334, a roar portion 335, and a volute tongue 336 formed between the starting end of the spiral portion 334 and the roar portion 335. The volute tongue 336 is close to the air outlet 3320 of the volute 33 of the fan, and the function of the volute tongue is to divert the airflow directed to the air outlet 3320 of the volute 33 to prevent part of the gas from circulating in the volute 33. The volute tongue 336 will cut the high-speed airflow discharged by the fan 32, generating a large noise. By increasing the distance from the volute tongue 336 to the fan edge 327, the noise can be effectively reduced.

[0315] In this embodiment, the distance between the volute tongue 336 and the fan blade (blade) edge 327 as indicated by the mark 336A is greater than or equal to 0.05 times the fan diameter. In one embodiment, the distance between the volute tongue 336 and the fan blade (blade) edge 327 is 0.08-0.12 times the fan diameter. Preferably, the distance 336A between the volute tongue 336 and the fan edge 327 is greater than or equal to 8 mm. More preferably, the distance 336A between the volute tongue 336 and the fan edge 327 is 9-15 mm. It should be noted that the mark 336A here can be understood as the minimum distance between the volute tongue 336 and the fan blade edge 327.

[0316] The radial dimension of the volute 33 affects the distance between the machine and the legs of the user when the user holds the blower and vacuum machine. By reducing the radial dimension of the volute 33, the arm extension angle can be reduced, the human-machine friendliness is improved, and the airflow generating part is rotated to perform the blow-and-vacuum conversion. Figure 7 As shown, in the direction perpendicular to the air outlet direction of the air outlet portion 332, the maximum distance from the rotation center O of the fan 32 of the volute 33 to the inner wall of the volute 33 is L1, and the distance from the rotation center O of the fan to the edge of the blade is L2. The ratio of the distance L1 to the distance L2 is greater than or equal to 1.2 and less than or equal to 2. Therefore, the ratio can be 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9. Preferably, the ratio of the distance L1 to the distance L2 is greater than or equal to 1.8 and less than or equal to 2. In this embodiment, on the one hand, the radial dimension of the volute 33 is reduced by reducing the distance between the edge of the fan 32 and the inner wall of the volute 22; on the other hand, the distance between the volute tongue 86 and the edge of the fan is increased to balance the high noise caused by reducing the distance between the inner wall of the volute and the edge of the fan. Specifically, the maximum distance L1 from the rotation center of the fan of the volute 33 to the inner wall of the volute 33 is less than or equal to 117 mm. Furthermore, the ratio of the distance 336A to the distance L1 is preferably greater than or equal to 8 / 117=0.06, and the ratio is, for example, 0.07, 0.09, or 0.12.

[0317] In order to reduce the radial dimension of the volute 33 while ensuring the blowing and suction efficiency, the present embodiment increases the thickness of the volute 33 to balance the volume of the volute 33 and ensure that sufficient air volume enters the volute 33. Specifically, Fig.10 As shown, in the direction in which the rotation axis of the fan 32 extends, the maximum distance between the two opposite inner walls of the volute 33 is W1, the height of the fan is W2, and the ratio of the maximum distance W1 to the height W2 is greater than 1. Preferably, the ratio range is greater than 1 and less than or equal to 1.3, so the ratio can be 1.1, 1.17, 1.18, 1.19, 1.21, 1.25, 1.26, 1.27, 1.28, 1.29.

[0318] This embodiment increases the wind speed by reducing the cross-sectional area of ​​the air outlet 3320 of the volute 33; and increases the air volume in the blowing mode by forming an auxiliary air inlet area (gap) 30 that is connected to the outside world between the air outlet 3320 of the volute and the first end 21 of the blowing and suction pipe 2. Figure 7 , Fig. 9 As shown, in the blowing mode, there is a gap between the air outlet 3320 and the first end 21 of the blowing and suction pipe 2, so that the external airflow can enter the blowing and suction pipe 2 from the gap 30. The air outlet 3320 and the first end 21 at least partially overlap in the axial direction or the front end surface of the air outlet 3320 and the rear end surface of the first end 21 are flush.

[0319] The cross-sectional area of ​​the air outlet 3320 of the volute 33 in the direction perpendicular to the air outlet should be within a suitable range, combined with the size of the cross-sectional area of ​​the blowing and suction pipe 2 in the air outlet direction, and the blowing and suction efficiency should be considered. If it is too small, it will cause blockage by leaves in the suction mode, while if it is too large, the negative pressure generated in the blowing mode will be small, and the effect of driving the surrounding air to flow into the blowing and suction pipe 2 to increase the air volume will not be obvious. In this embodiment, the ratio of the cross-sectional area of ​​the first end of the blowing and suction pipe 2 to the volute air outlet 3320 is in the range of 1.5 to 6. Preferably, the ratio of the cross-sectional area of ​​the first end of the blowing and suction pipe 2 to the volute air outlet 3320 is in the range of 3 to 5. Specifically, the ratio can range from 4, 4.2, 4.5, 4.6, 4.8. In one example, Figure 7 The diameter 332D of the air outlet 3320 of the volute 33 is 50-80 mm, and the diameter 21D of the first end 21 of the blowing and suction pipe 2 is 100-130 mm. It should be noted that the first end here can be understood as the circular opening of the blowing and suction pipe 2 close to the airflow generating device.

[0320] Fifth embodiment

[0321] Refer to the following Fig. 8A and Figure 8B A fifth embodiment according to the present invention will be described.

[0322] Different from the first embodiment, in this embodiment, the airflow generating device (volute 33 and motor 31) does not rotate relative to the body 1 (grip portion 11). Instead, the blowing and suction pipe 2 can rotate relative to the body 1 and the airflow generating device to achieve blowing and suction conversion.

[0323] Reference Fig. 8A and Figure 8B In this embodiment, the airflow generating device, more specifically, the motor 31 and the volute 33 are fixedly connected to the fuselage 1. The volute 33 includes an air inlet 331 and an air outlet 332.

[0324] The blowing and suction machine also includes a bracket 89, which is used to rotatably connect the blowing and suction tube 2 to the volute 33. The bracket 89 includes a blowing and suction tube connecting portion 891 and a volute connecting portion 893, which can be formed integrally. The first end 21 of the blowing and suction tube 2 is connected to the blowing and suction tube connecting portion 891 and can move axially along the central axis of the blowing and suction tube 2 relative to the blowing and suction tube connecting portion 891. The volute connecting portion 893 is rotatably connected to the volute 33 at mark 894. That is, the blowing and suction tube 2 can be pivotally arranged relative to the holding portion with the rotation axis A', and the blowing and suction tube 2 can be rotated between the blowing position and the suction position. In the blowing position (such as Fig. 8A ), the rotation axis of the fan 32 is perpendicular to the extension direction of the blowing and suction pipe 2; when in the suction position (such as Figure 8B ), the rotation axis of the fan 32 is substantially consistent with the extension direction of the blowing and suction pipe 2.

[0325] Except that the blowing and suction pipe 2 rotates instead of the airflow generating device, the connection method of the blowing and suction pipe 2 to the air inlet part 331 and the air outlet part 332, the axial movement method of the blowing and suction pipe 2 relative to the bracket 89, and the blowing and suction conversion method of this embodiment are similar to the first and second embodiments.

[0326] The following describes the action process during the blowing and sucking conversion.

[0327] In this embodiment, the blowing and suction pipe 2 is slidably connected to the blowing and suction pipe connecting portion 891. Fig. 8A and Figure 8B As shown, the lever 9A includes a first portion 9A1 and a second portion 9A2, and the lever 9A is pivotally mounted to the blowing and suction pipe connecting portion 891 via a pivot 14A at the junction of the first portion 9A1 and the second portion 9A2. A long hole 91A is formed at one end of the second portion 9A2, and the pivot 23A extending from the side wall of the blowing and suction pipe 2 is inserted into the axial long hole 892 of the bracket 89 and the long hole 91A of the lever 9A. In this way, the lever 9A can be rotated around the pivot 14A by shifting the first portion 9A1 of the lever 9A, thereby driving the first end 21 of the blowing and suction pipe 2 to move closer to and away from the airflow generating device (volute 33).

[0328] For example, in Fig. 8A The suction mode is Figure 8B When switching to the blowing mode, first, pull the first part 9A1 of the lever 9A toward the grip 11 to move the first end 21 of the blowing and suction pipe 2 away from the volute 33 and disengage from the air inlet 331 of the volute 33; then, move the bracket 89 and the blowing and suction pipe 2 together along the Fig. 8A The volute 33 is rotated about 90 degrees counterclockwise relative to the body 1 so that the air outlet 332 of the volute 33 is aligned with the first end 21 of the blowing and suction pipe 2; finally, the first part 9A1 of the lever 9A is pushed to move the first end 21 of the blowing and suction pipe 2 toward the volute 33 and engage with the air outlet 332 of the volute 33.

[0329] In from Figure 8B The blowing pattern shown is Fig. 8A When the suction mode is switched, the lever 9A is moved to rotate the bracket 89 and the blowing and suction pipe 2 in the direction of the arrow P3. Fig. 8A In the suction mode shown, the air outlet 332 is connected to the garbage bag. Figure 8B In the blowing mode shown, the air inlet portion 331 is exposed.

[0330] The above-mentioned embodiments may be appropriately combined with each other. For example, the second embodiment may be combined with the first embodiment. The third embodiment may be combined with the first embodiment. The fourth embodiment may be combined with the first to third embodiments and the fifth embodiment.

[0331] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make various changes and modifications to the above-mentioned embodiments of the present invention under the guidance of the present invention without departing from the scope of the present invention.

[0332] (1) For example, the collecting means is not limited to the garbage bag 7, and a part of the body 1 may be used as the collecting means.

[0333] The garbage bag 3 may also be partially or almost completely exposed from the body 1 .

[0334] (2) Sometimes, people will collectively refer to the motor, the fan blades (blades) and the housing including the volute as a fan. In the present application, the fan does not include the above-mentioned motor and volute, but includes the fan blades and may also include a shaft connected to the fan blades.

[0335] (3) In the present invention, the blowing and suction pipe 2 does not necessarily have to be a straight pipe.

[0336] Furthermore, the diameter of the blowing and suction pipe 2 does not necessarily have to be the same at all positions in the axial direction thereof.

[0337] (4) In the blowing mode, the air inlet 13 of the fuselage does not need to be directly connected to the air inlet 331 of the volute 33, and a gap may be left between the two.

[0338] (5) The guide rail (or guide groove) 15 may not be provided, and the inner peripheral surface of the blowing and suction pipe connecting portion 12 may play the role of guiding the blowing and suction pipe 2 .

Claims

1. A blowing and suction machine, which has a blowing mode and a suction mode, and the blowing and suction machine comprises: An airflow generating device, comprising a motor and a fan driven by the motor to rotate and generate an airflow, the airflow generating device comprising an air inlet and an air outlet connected to each other, the air inlet comprising an air inlet that can be connected to the outside in a blowing mode, and the air outlet comprising an air outlet for the inhaled foreign matter to flow out in a suction mode; A blowing and suction pipe, having a pipe opening connected to the outside for air intake or air exhaust, the blowing and suction pipe is a single-cavity air duct, which is provided with a first end close to the airflow generating device; It is characterized in that the blower-suction machine also includes a body that is at least partially shielded by the periphery of the airflow generating device, the body includes a grip for an operator to hold and a main body shell connected to the grip, and the airflow generating device rotates relative to the main body shell and / or the grip to enable the blower-suction machine to switch between the blowing mode and the suction mode.

2. The blowing and suction machine according to claim 1, characterized in that: The airflow generating device is rotatably mounted in the main housing via a rotating axis A, and the blower-suction machine also includes a blow-suction conversion mechanism, which can operably drive the airflow generating device to rotate around the rotating axis A relative to the main housing to drive the blower-suction machine to be in a blowing position in the blowing mode or a suction position in the suction mode.

3. The blowing and suction machine according to claim 1, characterized in that: The airflow generating device pivots around a rotation axis A relative to the main body housing and / or the gripping portion. In the blowing mode, the motor body is located below the rotation axis A.

4. The blowing and suction machine according to claim 1, characterized in that: When the airflow generating device rotates to the blowing position, the air outlet is opposite to the first end of the blowing and suction tube, and the airflow flows from the air inlet into the inner cavity of the airflow generating device, and flows from the air outlet of the airflow generating device into the blowing and suction tube; when the airflow generating device rotates to the suction position, the air inlet is connected to the first end of the blowing and suction tube, and the airflow enters the air inlet of the airflow generating device from the pipe mouth, and flows out from the air outlet.

5. The blowing and suction machine according to claim 1, characterized in that: The air inlet portion of the air flow generating device is sealedly connected to the first end of the blowing and suction pipe in the suction mode.

6. The blowing and suction machine according to claim 1, characterized in that: The opening direction of the air inlet portion and the opening direction of the air outlet portion are arranged opposite to each other.

7. The blowing and suction machine according to claim 1, characterized in that: The airflow generating device is an independent integral structure. When the blower-suction machine switches between the blowing mode and the suction mode, the independent integral structure can rotate as a whole relative to the main body shell and / or the gripping portion.

8. The blowing and suction machine according to claim 1, characterized in that: When the blower-suction machine is in the blowing mode and the suction mode, the axial distance between the front end of the nozzle and the rotation axis A remains unchanged.

9. The blowing and suction machine according to claim 1, characterized in that: The airflow generating device is an independent integral structure. When the blower-suction machine switches between the blowing position and the suction position, the motor does not rotate relative to the fan, and the motor can be in a rotating state relative to the body.

10. The blowing and suction machine according to claim 1, characterized in that: When the blowing-suction machine is in the blowing mode or the suction mode, the extension direction or the installation direction of the blowing-suction pipe remains unchanged.

11. The blowing-suction machine according to claim 1, characterized in that: The gripping portion extends longitudinally along a first axis, the blowing and suction tube extends longitudinally along a second axis, and when the airflow generating device rotates to switch between the blowing mode and the suction mode, the angle formed by the first axis and the second axis remains unchanged.

12. A single-tube blowing and suction machine having a blowing mode and a suction mode, the blowing and suction machine comprising: The body includes a gripping portion for the operator to hold and a host housing connected to the gripping portion; An airflow generating device, comprising a motor and a fan driven by the motor to rotate and generate an airflow, the airflow generating device comprising an air inlet and an air outlet connected to each other, the air inlet comprising an air inlet that can be connected to the outside in a blowing mode, and the air outlet comprising an air outlet for the inhaled foreign matter to flow out in a suction mode; A blowing and suction pipe, having a pipe opening connected to the outside for air intake or air exhaust, and having a first end close to the airflow generating device; It is characterized in that the blower-suction machine also includes a blowing-suction conversion mechanism, which can be operably driven to drive the airflow generating device to rotate relative to the main body shell and / or the holding portion to drive the blower-suction machine to be in the blowing position in the blowing mode or the suction position in the suction mode.

13. The blowing-suction machine according to claim 12, characterized in that: When the blowing-suction machine is in the blowing mode or the suction mode, the extension direction or the installation direction of the blowing-suction pipe remains unchanged.

14. The blowing-suction machine according to claim 12, characterized in that: The gripping portion extends longitudinally along a first axis, the blowing and suction tube extends longitudinally along a second axis, and when the airflow generating device rotates to switch between the blowing mode and the suction mode, the angle formed by the first axis and the second axis remains unchanged.

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