JPH088902B2 - Electric vacuum cleaner - Google Patents

Description

Description: [Object of the invention] (Field of industrial application) The present invention relates to an electric vacuum cleaner, and more particularly to an electric vacuum cleaner provided with an exhaust filter capable of exhausting air with high cleanliness.

(Prior art) A high-density fold that is made of glass fiber or the like and is accordion-shaped in order to collect the fine dust in the exhaust air that was not conventionally captured by the filter of the dust collection unit in the cleaner body. There is known an electric vacuum cleaner in which a high-performance exhaust filter having the above-mentioned filter member held in a substantially rectangular holding frame is arranged on the positive pressure side, that is, the exhaust side of an electric blower in a cleaner body. In the conventional electric vacuum cleaner of this type, as shown in FIG. 8, a pair of substantially U-shaped frame members 1 and 1 are combined to form a substantially rectangular holding frame 2. An adhesive applied to the inner surface of the holding frame 2 over the entire circumference keeps the airtightness between the holding frame 2 and the periphery of the filter member 3 and fixes the both. Then, in assembling, first, the adhesive is applied almost entirely to the inner surface of each frame member 1, 1, and then,
The filter member 3 is fitted into and bonded to one of the frame members 1,
Next, the other frame member 1 is fitted and adhered to the filter member 3, and the claw portions 4 and the claw receiving portions 5 of both frame members 1 and 1 are engaged and adhered to each other so that both frame members In order to combine the 1, 1 and further improve the airtightness, an adhesive is injected between the edge portions of the frame members 1, 1 and the edge portion of the filter member 3.

(Problems to be solved by the invention) However, in this conventional structure, since the holding frame 2 that holds the filter member 3 in an airtight manner is formed by connecting the pair of frame members 1 and 1, the number of assembly steps increases. The cost was expensive. In addition, quality problems such as air leakage from the engaging portions of the frame members 1 and 1 during cleaning and damage to the filter member 3 during assembly have occurred.

An object of the present invention is to solve the above-mentioned problems, to assemble a high-performance exhaust filter easily and inexpensively, to prevent the filter member from being damaged at the time of assembling, and to reliably maintain airtightness. The purpose is to provide an electric vacuum cleaner that ensures that exhaust air passes through the filter member.

[Structure of Invention]

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides an electric blower housing part that incorporates an electric blower, and a suction port that is formed at the negative pressure side of the electric blower housing part. Equipped with an exhaust filter that is located between the dust collection part that has a dust collection filter that collects the inhaled dust, and the exhaust part that communicates with the exhaust side and the outside of the electric blower storage part. In an electric vacuum cleaner having a vacuum cleaner body having an exhaust filter mounting portion, the exhaust filter includes a filter member folded in a pleated shape, and heat-bonded to both side surfaces of the filter member in a direction in which the fold extends. A sheet-like seal body that is airtightly fixed by means of, for example, a holding frame in which the filter member is fitted and housed in a housing part, and the sheet-like seal body is the filter part. The filter is made longer than the material, and both ends thereof are projected from the filter member. Further, the holding frame has a cylindrical shape integrally formed, and has a pressing portion on one end surface that is in contact with one end surface of the filter member. , The other end has a large opening having a size through which the filter member can pass, and the four ends of the sheet-like seal bodies are inserted into the four openings at the four corners of the holding frame. And a large opening portion of the holding frame is made larger than a cross-sectional area of the storage portion of the filter member in the holding frame, and the storage portion and the large opening are formed. A chamfer is formed over the entire circumference between the holding frame and the chamfered portion of the holding frame and the peripheral portion of the filter member housed in the housing inside the holding frame is airtight over the entire circumference. A series of adhesives that maintain It is provided with a sealing material.

(Operation) In the electric vacuum cleaner of the present invention, at the time of assembling the exhaust filter, first, the sheet-shaped seal bodies are airtightly fixed to the both side surfaces of the filter member folded in the fold shape in the extending direction of the folds by heat fusion or the like. However, at this time, both end portions of both sheet-like seal bodies that are longer than the filter member are made to project from the filter member, respectively. Then, the filter member is fitted and stored in the storage portion in the integrally formed tubular holding frame through the large opening portion, and at this time, the large opening portion and the storage portion having a smaller cross-sectional area than the large opening portion are provided. Since there is a chamfered portion over the entire circumference between the two, the filter member is fitted smoothly, and both ends of both sheet-shaped seal bodies are inserted into the recessed groove-shaped inlets at the four corners of the holding frame. Thus, the filter member is positioned with respect to the holding frame. Further, in this state, one end surface of the filter member is brought into contact with the holding portion of the one end surface of the holding frame. Next, a sealing material is applied over the entire circumference between the chamfered portion of the holding frame and the peripheral edge portion of the filter member.At this time, the chamfered portion guides the sealing material, so that the sealing The material is surely applied across the holding frame and the filter member including the sheet-shaped sealing body. In this state, the airtightness between the holding frame and the periphery of the filter member is maintained, but the gap between the folds is filled with the sheet-shaped sealing body especially on both side surfaces of the filter member in the extending direction of the folds. Thereby, even if the sealing material is provided only on the large opening side, the airtightness is maintained.

(Embodiment) Hereinafter, a configuration of an embodiment of the electric vacuum cleaner of the present invention will be described with reference to FIGS. 1 to 7.

In FIG. 1, 11 is a vacuum cleaner body, an electric blower housing portion 13 having an electric blower 12 built therein, and the electric blower housing portion.
Paper dust filter formed on the negative pressure side of 13
It has a dust collecting part 15 to which 14 is detachably mounted, and an exhaust chamber 16 formed so as to communicate with the positive pressure side of the electric blower housing part 13, that is, the exhaust side. A dust collector cover 17 for opening and closing the dust collector 15 is provided at the front of the cleaner body 11 so as to be openable and closable.
A suction port 18 is formed which is opened to communicate with 15 and which connects a connecting pipe of a hose (not shown) in a detachable and rotatable manner. The vacuum cleaner body 11 is detachably held with the mouth plate portion 19 of the bag-like dust collecting filter 14 so as to face the inside of the dust collecting portion cover 17, and the mouth plate portion 10 of the dust collecting filter 14 is held. A holding member 20 is provided for air-tightly connecting to the suction port 18. Further, the suction port 18 is provided with a shutter 21 that can be opened and closed so as to close the suction port 18 when a hose connecting pipe is not connected. Further, a partition 22 is provided between the dust collector 15 of the cleaner body 11 and the electric blower storage 13, and the partition 22 is provided with a grid-like ventilation part 24. . Further, a sub-dust collecting filter 25 is provided on the partitioning portion 22 so as to face the ventilation portion 24 and is detachably provided on the dust collecting portion 15 side. It is designed to catch dust that has leaked from the.

Further, the periphery of the suction side of the electric blower 12 housed in the electric blower housing portion 13 of the electric vacuum cleaner body 11 has a vent hole portion of the partition wall 26 formed in the front part of the electric blower housing portion 13.
Airtightly abutted around 27 via packing 28. The rear portion of the electric blower 12 is supported by the support wall 29 via the packing 30. The exhaust chamber 16 is formed in the rear portion of the electric blower housing portion 13 so as to communicate with a ventilation portion (not shown) of the support wall 29.

The exhaust chamber 16 is provided with a box-shaped exhaust filter mounting portion 33 having an opening 32 formed at an upper portion thereof by opening the exhaust cover 31. The front wall portion 34 and the rear wall portion 35 of the exhaust filter mounting portion 33 are provided with a lattice-shaped ventilation portion 3
6,37 are formed.

Reference numeral 41 denotes an exhaust filter which is detachably mounted in the exhaust filter mounting portion 33. The exhaust filter 41 includes a filter member 42 and an internal filter member 42 as shown in FIGS. A holding frame 43 and the like which are airtightly and fixedly fitted and housed therein.

The filter member 42 is a high-density and high-efficiency filter member, and a sheet-like body formed by mixing metal fibers such as copper as a main component with ultrafine glass fibers is folded into a fold, that is, an accordion shape, and is formed as a whole. Is formed in a rectangular parallelepiped shape.

Further, on both surfaces of the filter member 42, that is, on the upstream side and the downstream side, a plurality of pairs of separators 44 made of synthetic resin or the like for holding the pitch of the pleats of the filter member 42 are provided.
Are fixed by heat fusion or the like. Then, the separator 44, as shown in FIG.
The filter member 42 is folded in a pleated shape and extends in a direction orthogonal to the folds of the filter member 42 and is continuous from its upper edge to its lower edge. It should be noted that the separator 44 may be provided only on the middle portion in the left-right direction of the filter member 42 as shown in the figure, or may be provided on both left and right edges of the filter member 42.

Further, sheet-like seal bodies 45 are airtightly fixed to both side surfaces of the filter member 42 in the extending direction of the folds, that is, both left and right side surfaces. As a result, the gap between the folds is filled on the left and right side surfaces of the filter member 42. The sheet-shaped sealing body 45 is made of, for example, polyamide synthetic resin, and is heat-sealed to the filter member 42 by hot melt. Although the sheet-shaped seal body 45 is automatically cut, the width in the front-rear direction is substantially equal to the width in the front-rear direction of the filter member 42, and the length L in the up-down direction is the upper and lower sides of the filter member 42. It is slightly longer than the length 1 in the direction (L> l). Then, the both sheet-like seal bodies 45,
The upper and lower ends respectively protrude from the four corners of the filter member 42 by about 2 mm, for example.

The holding frame 43 is integrally formed of synthetic resin or the like, and is formed in a short rectangular tube shape. The holding frame 43 has a storage portion 51 having a size into which the filter member 42 is fitted, and the front end face is entirely opened to allow the filter member 42 to pass therethrough. It is part 52. The width of the storage portion 51 in the front-rear direction is substantially equal to the width of the filter member 42 in the front-rear direction. In addition, a pressing portion 53 that is bent inward is formed on the peripheral portion of the rear end surface of the holding frame 43.
The inside of this is a small opening 54 smaller than the front shape of the filter member 42. Further, recessed groove-shaped inlet portions 55 extending in the front-rear direction and extending to the large openings 52 are formed at the four corners of the holding frame 43, that is, the left and right edges of the upper and lower inner surfaces. The depth of these intake portions 55 is substantially equal to the amount of protrusion (L-1 / 2) from the filter member 42 at the upper and lower end portions of both sheet-like seal bodies 45. Further, the area of the large opening portion 52 is larger than the cross-sectional area of the storage portion 51, but is located between the storage portion 51 and the large opening portion 52, and the inner peripheral surface of the holding frame 43 is A chamfered portion 56, which is an inclined surface facing forward, is formed over the entire circumference. A seal packing 57 is wound around the outer peripheral surface of the holding frame 43 so as to be airtightly fixed.

Then, the filter member 42 is fitted in the holding frame 43, and the pressing portion 53 is provided on the peripheral edge portion of the rear end surface of the filter member 42.
Are abutted from the rear, and between the chamfered portion 56 on the large opening 45 side of the holding frame 43 and the front end peripheral edge portion of the filter member 42 including the sheet-shaped seal body 45, for example, thermoplastic polyamide Sealing material 58 made of resin adhesive, etc.
Is applied over the entire circumference, the filter member 42 and the holding frame 43 are adhered, and the airtightness between them is maintained. The sheet-shaped sealing member 45 is covered with a sealing material 58 at both left and right edges of the filter member 42.

The exhaust cover 31 closes the opening 32 in an airtight manner, and together with this, the seal packing 57 of the exhaust filter 41 is brought into pressure contact with the seal packing 57, so that the exhaust filter mounting portion 33. Airtightly press against the inner surface of the exhaust filter 41, and seal the entire circumference of the exhaust filter 41.
The airtight contact is maintained by means of.

Further, as shown in FIG. 1, an accessory storage space 62 that is opened and closed by a storage cover 61 is formed at the upper part of the electric blower storage part 13 and the upper part of the exhaust chamber 16 of the cleaner body 11. The exhaust part cover 31 is arranged in the accessory storage space 62 so that a part of the bottom of the accessory storage space 62 is formed by the exhaust part cover 31. And in the accessory storage space 62, accessories such as a floor brush and a vine.
63 is designed to be stored.

Further, on the rear surface of the cleaner main body 11 at the rear part of the exhaust chamber 16, a lattice-shaped exhaust part 66 communicating with the exhaust chamber 16 and the outside is formed, and can be opened and closed at the rear side of the exhaust part 66. An exhaust cover 67 is provided in the exhaust cover 67, and the exhaust cover 67 has a grid-like ventilation section.
68 are formed. A sub exhaust filter 69 having deodorizing and deodorizing properties is detachably attached to the inner surface of the exhaust lid 67. The exhaust cover 67 is rotatably supported by a shaft 70 on the lower portion of the rear surface of the cleaner body 11.

 Next, the operation of this embodiment will be described.

 First, a method of assembling the exhaust filter 41 will be described.

First, as shown in FIG. 3, the sheet-like sealing bodies 45 are airtightly fixed to the left and right side surfaces of the filter member 42 by heat fusion or the like. At this time, the upper and lower ends of both sheet-like seal bodies 45 are made to project from the filter member 42, respectively.

Next, the large opening 52 is passed through the storage portion 51 in the holding frame 43 to fit and store the filter member 42. At this time, since the chamfered portion 56 is provided on the large opening 52 side in the holding frame 43,
The filter member 42 is fitted smoothly. Further, both ends of both sheet-like seal bodies 45 are inserted into the respective intake portions 55 in the holding frame 43, so that the filter member 42 is reliably positioned with respect to the holding frame 43. In this state, the filter member
The peripheral edge portion of the rear end surface 42 abuts on the holding portion 53 of the holding frame 43.

Next, as shown in FIG. 7, the chamfered portion 56 of the inner peripheral surface of the holding frame 43 with the large opening 52 side facing upward and the sheet-shaped seal body.
The sealing material 58 is applied to the periphery of the front end surface of the filter member 42 including 45 by injecting the sealing material 58 from a syringe 76 over the entire circumference. In this way, the filter member 42 and the holding frame 43 are airtightly bonded. By the way, if the chamfered portion 56 is not provided, the seal member 58 does not adhere to the inner peripheral surface of the holding frame 43 perpendicular to the front end surface of the filter member 42, and the filter member 42
May be attached only to the peripheral edge of the front end face of the filter, but if a large amount of the sealing material 58 is attached to prevent this, the sealing material 58 will be applied to many parts of the filter member 42, resulting in poor air permeability. May be. However, according to the above configuration, since the holding frame 43 has the chamfered portion 56, if the sealing material 58 is applied to the chamfered portion 56, the fluidity of the sealing material 58 can be increased without increasing the amount of the sealing material 58 too much. As a result, the sealing material 58 is guided by the inclination of the chamfered portion 56, and this sealing material 58 surely spreads over the entire corner between the chamfered portion 56 of the holding frame 43 and the peripheral edge of the front end surface of the filter member 42. It will surely be applied across both.

In particular, in the left and right side surfaces of the filter member 42 in the fold extending direction, since the gap between the folds is filled with the sheet-shaped seal body 45, the large opening 52 is formed.
Even if the sealing material 58 is provided only on the side, airtightness is maintained. Moreover, since both ends of the sheet-shaped seal body 45 project from the filter member 42, airtightness is more reliably maintained, and air leakage may occur between the holding frame 43 and the filter member 42 during cleaning. There is no.

When the exhaust filter 41 is attached to the cleaner body 11, first, the storage cover 61 is opened, the exhaust cover 31 is removed and the opening 32 is opened, and the exhaust filter 41 is attached to the exhaust filter installation part.
Insert into 33. At that time, the exhaust filter 41 directs the side having the sealing material 58 toward the electric blower 12 side, that is, the upstream side in the exhaust chamber 16.

Next, when the opening 32 of the exhaust chamber 16 is sealed by the exhaust cover 31, the exhaust cover 31 is pressed against the seal packing 57 of the exhaust filter 41, and the seal packing 57 is attached to the exhaust filter mounting portion 33. Is pressed against the inner surface of the exhaust filter 41, and the entire periphery of the exhaust filter 41 is held in airtight contact with the seal packing 57, and one seal is provided between the upstream side of the electric blower housing portion 13 side of the exhaust filter 41 and the downstream side of the exhaust chamber 16. It is airtightly partitioned by packing 57. Further, the storage section lid 61 is closed.

When cleaning, open the dust collector cover 17 and hold the holding member 20.
After mounting the mouth plate portion 19 of the dust collecting filter 14 on, the lid 17 is closed, the mouth portion of the dust collecting filter 14 is airtightly connected to the suction port 18, and the shutter 21 of the suction port 18 is opened. The connection pipe of the suction hose is connected, and further, the extension pipe and the suction port body are connected to the suction hose connected to this connection pipe.

When the electric blower 12 is driven in this state, the extension pipe, the hose and the suction port 18 are sucked together with air from the suction port body.
The dust that has flowed into the dust collecting portion 15 via the is collected by the dust collecting filter 14, and the air filtered by the dust collecting filter 14 is further filtered by the sub dust collecting filter 25. The dust collecting filters 14 and 25 collect coarse dust and fine dust of 1 μm or more. Next, the air that has passed through the sub dust collecting filter 25 is sucked into the suction side of the electric blower 12 and is exhausted from the discharge side of the electric blower 12 to the exhaust chamber 16, and the exhaust air in this exhaust chamber 16 is the high-performance exhaust filter 41. Further filtered by. Here, the fine dust contained in the exhaust air that has not been collected by the dust collection filters 14 and 25 is captured at 0.3 μm DOP collection efficiency of 99.97% or more, and the exhaust air passes through the sub exhaust filter 69 to deodorize. Alternatively, odors such as fragrance are deodorized, and clean exhaust air is discharged from the ventilation portion 68 of the exhaust lid 67 to the outside of the cleaner body 11.

According to the above configuration, since the holding frame 43 that holds the high-density filter member 42 of the exhaust filter 41 is an integrally molded product,
Assemblability is improved and cost can be reduced. Further, since no unreasonable force is applied to the filter member 42 during assembly, the filter member 42 can be prevented from being damaged. Further, air does not leak from the engaging portion of the frame member as in the case where the pair of frame members are combined to form the holding frame.

Further, since the sheet-like sheet member 45 is adhered to both side surfaces of the filter member 42 in the direction in which the folds extend, the shape retention of the filter member 42 is improved and its strength is improved. Along with this, the presence of the sheet-shaped seal body 45 allows the large opening
Only by applying the sealing material 58 from one direction on the 52 side, the holding frame
Airtightness between 43 and the filter member 42 can be maintained easily and reliably. Furthermore, since the length of the sheet-shaped seal body 45 is set such that both ends thereof protrude from the filter member 42, the airtightness can be made more reliable.

Moreover, since the holding frame 43 is provided with the intake portion 55 into which both ends of the sheet-shaped seal body 45 are inserted and positioned, the assembly workability is improved and the quality of the exhaust filter 41 is stabilized.

Further, a chamfered portion 56 is provided on the inner peripheral surface large opening 52 side of the holding frame 43.
Since the sealant 58 is provided, the sealing material 58 can be injected easily and reliably, the assembling workability is further improved, and the quality of the exhaust filter 41 is stabilized. That is, the chamfered portion 56
As a result, the injectability of the seal material 58 is improved, and the occurrence of air leakage from a small gap due to insufficient filling of the seal material 58 can be reliably prevented. Therefore, at the time of cleaning, the exhaust air will surely pass through the filter member 42,
A clean exhaust is obtained.

〔The invention's effect〕

According to the present invention, a sheet-like seal member is airtightly fixed to both side surfaces of the fold-shaped filter member of the exhaust filter in the extending direction of the fold, and a holding frame having a storage portion in which the filter member is fitted and stored is provided. A tubular integrally molded product having a holding portion on one end surface that abuts on one end surface of the filter member and a large opening portion on the other end surface through which the filter member can pass. Since the sealing material is provided over the entire circumference between the filter member fitted into the holding frame and the peripheral portion, the strength of the filter member is improved, and the exhaust filter is easily assembled. It is possible to prevent breakage of the filter member in, the airtightness between the filter member and the holding frame can be easily maintained, and air is generated from the engaging portion of the frame member as in the case where the holding frame is configured by a pair of frame members. It never leaks. In addition, the sheet-shaped seal body is made longer than the filter member, and both end portions of the sheet-shaped seal body are projected from the filter member, and both ends of both sheet-shaped seal bodies are pulled out to the large openings at the four corners in the holding frame. Since the recessed groove-shaped inlet portion into which each portion is inserted is formed, the filter member is positioned with respect to the holding frame during assembly, which improves assembly workability and airtightness between the holding frame and the filter member. Can be held more reliably.
Further, the area of the large opening portion of the holding frame is made larger than the cross-sectional area of the storage portion in the holding frame, and the chamfered portion is formed over the entire circumference between the storage portion and the large opening portion. Since the chamfered portion is provided with the sealing material such as an adhesive, it is easy to fit the filter member into the holding frame, and the sealing material can be easily and surely provided between the two. Further, the airtightness between the filter members can be maintained more reliably. In this way, it is possible to provide an exhaust filter of stable quality, which can be easily assembled at low cost, and which can surely obtain clean exhaust gas.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the electric vacuum cleaner of the present invention, FIG. 2 is an exploded perspective view of the same exhaust filter, and FIG. 3 is a perspective view of a filter member having a sheet-like seal member fixed thereto. FIG. 4 is a front view of the same exhaust filter, FIG. 5 is a vertical sectional view of the same exhaust filter, FIG. 6 is an enlarged perspective view of a part of the same filter member, and FIG. FIG. 8 is an exploded perspective view showing an example of an exhaust filter of a conventional electric vacuum cleaner. 11 …… Vacuum cleaner body, 12 …… Electric blower, 13 …… Electric blower storage, 14 …… Dust collection filter, 15 …… Dust collection, 18 ……
Suction port, 25 ... Sub dust collecting filter, 33 ... Exhaust filter mounting part, 41 ... Exhaust filter, 42 ... Filter member, 43
…… Holding frame, 45 …… Sheet-like seal body, 51 …… Storage section,
52 …… Large opening, 53 …… Presser section, 55 …… Calling section, 56…
… Chamfer part, 58 …… Seal material, 66 …… Exhaust part.

Claims (1)

[Claims] 1. A dust collecting section provided with an electric blower storage section containing an electric blower, and a dust collecting filter formed on the negative pressure side of the electric blower storage section for collecting dust sucked from the suction port. And an exhaust filter mounting section for mounting an exhaust filter for collecting fine dust, which is located between the exhaust side of the electric blower housing section and an exhaust section communicating with the outside, and the exhaust body The filter includes a filter member folded in a pleated shape, and a sheet-like seal body airtightly secured to both side surfaces of the filter member in the extending direction of the fold,
The filter member includes a holding frame fitted and stored in an internal storage portion, the sheet-shaped sealing body is longer than the filter member, and both ends thereof are projected from the filter member. A tubular body integrally formed, and having a pressing portion on one end surface that abuts on one end surface of the filter member,
The other end has a large opening that is large enough for the filter member to pass through, and at four corners in the holding frame, both ends of the sheet-shaped seal bodies are inserted into the recessed grooves to be inserted into the grooves. A large opening portion of the holding frame, the area of the large opening portion of the holding frame is made larger than the cross-sectional area of the storage portion of the filter member in the holding frame, and the storage portion and the large opening portion are provided. A chamfered portion is formed over the entire circumference, and airtightness is maintained over the entire circumference between the chamfered portion of the holding frame and the peripheral edge portion of the filter member housed in the housing portion inside the holding frame. An electric vacuum cleaner characterized by having a sealing material.