CN105813364A - Electrostatic discharge structure of blow and suction ventilator - Google Patents

Abstract

The invention discloses an electrostatic discharge structure of a blow and suction ventilator. The electrostatic discharge structure comprises a case, a dust collection device and a conducting device, wherein an air outlet is formed in the case; the dust collection device is connected with the air outlet; the conducting device is arranged on the case; the electrostatic discharge structure is also provided with a ground lead which is electrically connected with the conducting device; and a ground terminal of the ground lead is in direct contact with the ground. According to the electrostatic discharge structure, the ground terminal of the ground lead is in direct contact with the ground, so that static electricity is directly discharged into the earth; the harm of the static electricity to a machine and an operator is thoroughly eliminated; and meanwhile, the problem that a dust collection bag must be in contact and rubbed with the ground in use is solved.

Description

An electrostatic discharge structure of a blower and suction fan

technical field

The invention relates to garden machinery, in particular to a blower and suction fan.

Background technique

Static electricity generated by friction is an objective natural phenomenon. At present, when gasoline and DC blowers in the domestic and foreign markets are sucking dry leaves and fine dust, relatively strong static electricity will be generated on the surface of the shell under the high-speed rotation of the fan blades. Because the casing of the blower is non-metallic and not grounded, the static electricity generated cannot be effectively released, and it usually accumulates on the metal parts and the outer surface. When the static electricity accumulates to a certain extent, it will damage the internal electronic components of the machine and cause electric shock Operator's risk. For this problem, the solution is also different. The blower and suction fan disclosed in the Chinese patent CN103382708 discloses a solution that introduces static electricity into the cloth bag and then releases static electricity when the cloth bag touches the ground. And discharge static electricity, but not completely, there are hidden dangers, because cloth bags are generally not used as grounding objects. In addition, the cloth bag cannot be in contact with the ground in actual use, otherwise it will cause inconvenient use and friction damage to the cloth bag. If the operator is taller, the dust bag will be far away from the ground, and the static electricity will not be released. The risk of static electricity still exists.

Contents of the invention

The technical problem to be solved by the present invention is to provide an electrostatic discharge structure of the blower and suction fan, which can eliminate the risk of static electricity and ensure safe use.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: an electrostatic discharge structure of a blower and suction fan, including a casing provided with an air outlet, a dust collecting device connected to the air outlet, and a conductive device arranged on the casing, The electrostatic discharge structure is also provided with a grounding wire electrically connected to the conductive device, and the grounding end of the grounding wire is in direct contact with the ground.

Preferably, the grounding end of the grounding wire is provided with a metal grounding part.

Preferably, the dust collecting device is a dust collecting bag installed on the air outlet through a fixing frame, and the ground wire is fixed on the dust collecting bag.

Preferably, the dust bag is provided with an extended tow strap, and the ground end of the ground wire passes through the tow strap.

Preferably, the conductive device includes a metal conductive element fixed at the air outlet and a metal conductive rod fixed on the fixing frame, and the metal conductive element and the metal conductive rod are connected by an electrical connection element.

Preferably, the metal conductive element is installed on the parting surface of the air outlet.

Preferably, the electrical connection element is a metal torsion spring, the first end of the metal torsion spring is in contact with the metal conductive element, and the second end of the metal torsion spring is in contact with the metal conductive rod.

Preferably, the metal conductive element is U-shaped, the first end of the metal conductive element is provided with a hook connected to the lead wire, and the second end of the metal conductive element is provided with a bend that is in elastic contact with the torsion spring. department.

Preferably, the lead wire extends to the parting surface at the main handle of the casing or/and the surface of the metal casing of the motor.

Preferably, the surfaces of the metal conductive elements, metal conductive rods, metal torsion springs and metal grounding parts are nickel-plated.

The technical scheme adopted by the present invention directly contacts the grounding end of the grounding wire with the ground, so the static electricity is directly released into the ground, and the harm caused by the static electricity to the machine and the operator is completely solved, and at the same time, the dust bag in use is avoided. Must mop the friction problem.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

Fig. 1 is the overall structure schematic diagram of blower blower;

Figure 2 is a schematic diagram of the decomposition structure of the casing and the dust bag;

Figure 3 is a schematic diagram of the enlarged structure at A in Figure 2;

FIG. 4 is a schematic diagram of the overall connection of the conductive components.

detailed description

Embodiment 1, as shown in Fig. 1 to Fig. 4, a kind of electrostatic discharge structure of air blower, comprises the casing 1 that is provided with air outlet 12, the dust collection bag 7 that is connected with air outlet 12, is provided with on casing 1 There is a main handle 11, and the dust bag 7 is provided with a ground wire 6, and the casing 1 and the dust bag 7 are electrically connected through a conductive device. The casing 1 is laid with a conductive wire 15 for guiding the static electricity on the casing 1. The conductive wire 15 and the grounding wire 6 are connected to the conductive device. Discharged into the earth, the harm of static electricity to machines and operators is completely solved.

Further, the ground end of the ground wire 6 is provided with a metal ground component 9 . The purpose of installing the metal grounding part 9 is to increase the weight of the grounding wire 6 to prevent the grounding wire 6 from being blown up, and at the same time increase the contact area between the grounding wire 6 and the ground to make electrostatic discharge more reliable. The metal grounding part 9 can be made of copper, aluminum and other metals with good electrical conductivity, and can be in the shape of a rectangular ring, a circular ring, or a triangular ring.

Wherein, the conductive device includes a metal conductive element 2 and a metal conductive rod 5, the metal conductive element 2 is fixed at the air outlet 12, the pocket of the dust bag 7 is connected to the air outlet 12 through the fixing frame 4, and the metal conductive rod 5 is installed on the fixed air outlet 12. Rack 4. Since there is a detachable structure between the casing 1 and the dust bag 7, an electrical connection element is provided between the metal conductive element 2 and the metal conductive rod 5. After the casing 1 and the dust bag 7 are assembled and installed, the electrical connection The element connects the metal conductive element 2 with the metal conductive rod 5 and the ground wire 6 . The casing 1 is composed of left and right halves assembled and fixed. The junction of the left and right halves is the parting surface. The metal conductive element 2 is generally fixed on the parting surface of the air outlet. This is because the static electricity of the blower and suction fan is mainly It is generated on the casing 1 (volute), and the static electricity is mainly concentrated on the parting surface of the air outlet, so the metal conductive element can directly discharge the static electricity on the parting surface of the air outlet.

In addition, in this embodiment, the electrical connection element adopts a metal torsion spring 3, the center of the metal torsion spring 3 is transferred to the casing through a pin 13, and the first end of the metal torsion spring 3 is in contact with the metal conductive element 2. The second end of the metal torsion spring 3 is in contact with the metal conductive rod 5 . The purpose of setting the metal torsion spring 3 is to facilitate use and disassembly, so that the electrostatic discharge circuit is in an elastic contact connection state when it is working.

Specifically, the metal conductive element 2 is U-shaped, and the first end of the metal conductive element is provided with a hook connected with the lead wire 15 . Wherein, the lead wire 15 can further extend to the parting surface at the main handle of the casing or/and the metal casing surface 14 of the motor. Although the static electricity is mainly concentrated on the parting surface of the air outlet, there may also be some static electricity on the parting surface of the motor and the main handle, so the wire can be further extended to release the static electricity that may be accumulated on the parting surface of the motor shell and the main handle go out. The second end of the metal conductive element is provided with a bending part that is in elastic contact with the torsion spring. After the casing is separated from the dust bag, the bending part no longer blocks the torsion spring leg, and the other leg of the metal torsion spring will spring up and hold dangling.

When the machine is working, dry leaves or fine dust rub against the side wall of the volute and the blades under the high-speed agitation of the fan blades to generate static electricity, and the generated static electricity will accumulate on the metal conductive element fixed on the parting surface of the volute air outlet. , and then pass through the metal torsion spring 3, the metal conductive rod 5, the grounding wire 6 and the metal grounding part 9 in sequence through contact, and finally release into the earth.

In this embodiment, the connecting parts in the electrostatic discharge circuit are metal conductive materials. The specific metals can be aluminum, copper and other metals with good conductivity and suitable cost, so that static electricity can be quickly and reliably released directly to the earth through these metal conductive materials. Medium; the surface of metal conductive elements, metal conductive rods, metal torsion springs and metal grounding parts is nickel-plated to avoid wear and corrosion during use.

Embodiment 2, as shown in Figures 1 to 4, on the basis of Embodiment 1, the ground wire 6 is fixed on the dust bag 7, specifically, a long strip of hidden belt can be sewn on the dust bag 7 71, the grounding wire 6 passes through the hidden belt 71, which not only hides the grounding wire 6, but also avoids the potential safety hazard caused by the exposed wire. The bottom of 7 extends out, and the grounding end of grounding wire is passed through from towing belt 8, and grounding wire 6 is hidden as a whole.

Specifically, the length of the towing belt 8 beyond the dust bag 7 is greater than 40 millimeters, a part of the grounding wire 6 is hidden in the hidden belt 71, and the remaining part is hidden in the towing belt 8, so that the fixed frame 4, the metal conductive rod 5, the dust bag 7, The grounding wire 6, the drag strip 8 and the metal grounding part 9 are combined into an integral part, which can be disassembled from the casing, which is convenient for the operator to use and makes the blower and suction fan more humanized.

In this embodiment, the problem that the dust bag must be rubbed against the ground to release static electricity is solved by increasing the towing strap 8, and the grounding wire 6 can also be hidden and the connection strength of the grounding wire 6 can be increased, and the safe length of the towing strap can be set to meet the needs of various heights. When the operator uses it, the release circuit can keep in contact with the ground, and the harm caused by static electricity to the hair dryer and the operator is completely solved.

As a modification of the above embodiment, the above-mentioned dust collecting bag 7 can be replaced by other dust collecting devices, such as directly connecting a dust collecting pipe at the air outlet, and then connecting the dust collecting pipe with the trash can. Moreover, the above-mentioned conductive devices and electrical connection elements can also be replaced with currently commonly used conductive components, such as conductive wires and various metal conductors, as long as the corresponding conductive functions are realized.

Claims (10)

1. An electrostatic discharge structure of a blower fan, comprising a casing provided with an air outlet, a dust collecting device connected to the air outlet, and a conductive device arranged on the casing, characterized in that: the electrostatic discharge structure is also provided with There is a grounding wire electrically connected to the conductive device, the grounding end of the grounding wire is in direct contact with the ground. 2. The electrostatic discharge structure of a blower according to claim 1, characterized in that: the grounding end of the grounding wire is provided with a metal grounding part. 3. The electrostatic discharge structure of a blower according to claim 2, characterized in that: the dust collection device is a dust collection bag installed on the air outlet through a fixing frame, and the ground wire is fixed on the dust collection bag. on the bag. 4 . The electrostatic discharge structure of a blower according to claim 3 , wherein the dust bag is provided with an extended tow strap, and the ground end of the ground wire passes through the tow strap. 5 . 5. The electrostatic discharge structure of a blower according to claim 3 or 4, characterized in that: the conductive device includes a metal conductive element fixed at the air outlet and a metal conductive rod fixed on the fixing frame, The metal conductive element is connected to the metal conductive rod through an electrical connection element. 6 . The electrostatic discharge structure of a blower according to claim 5 , wherein the metal conductive element is installed on the parting surface of the air outlet. 7 . 7. The electrostatic discharge structure of a blower according to claim 5, characterized in that: the electrical connection element is a metal torsion spring, and the first end of the metal torsion spring is in contact with the metal conductive element, so that The second end of the metal torsion spring is in contact with the metal conductive rod. 8. The electrostatic discharge structure of a blower according to claim 7, characterized in that: the metal conductive element is U-shaped, and the first end of the metal conductive element is provided with a hook connected to the lead wire , the second end of the metal conductive element is provided with a bent portion elastically contacting the torsion spring. 9 . The electrostatic discharge structure of a blower according to claim 8 , wherein the lead wire extends to the parting surface at the main handle of the casing or/and the surface of the metal casing of the motor. 10 . 10 . The electrostatic discharge structure of a blower according to claim 7 , characterized in that the surfaces of the metal conductive elements, metal conductive rods, metal torsion springs and metal grounding parts are nickel-plated. 11 .