CN1132551C - Reflux duster - Google Patents

Abstract

A return type vacuum cleaner has an impeller formed beside a motor and a cooling blower in which circulation paths of air sucked by the impeller for a cleaning process and air sucked by the cooling blower for a motor cooling process are respectively determined. Heating of the motor is prevented and the performance and efficiency of the vacuum cleaner is improved.

Description

Backflow vacuum cleaner

The invention relates to a vacuum cleaner, in particular to an exhaust return type vacuum cleaner, which can use the external air sucked by the cooling blower to cool the used impeller motor.

In general, vacuum cleaners collect foreign matter, such as dust, by drawing in air around the surface to be cleaned and expelling it while using a dust bag and exhaust filter to filter out foreign matter. Since the gas discharged from such vacuum cleaners has an unpleasant smell, there is a problem that users feel uncomfortable when using the vacuum cleaners. In order to solve such problems of vacuum cleaners, a so-called backflow type vacuum cleaner has been proposed. The purpose of a backflow vacuum cleaner is to substantially prevent the dispersal of unpleasant odors by re-breathing the air exhausted by the vacuum cleaner body, ie by circulating the air.

Figure 1 shows an example of such a conventional backflow vacuum cleaner, which comprises: a body 10 with a suction passage 11 and an exhaust passage 12, a dust collection chamber 13 located in the suction passage 11, which is rotated by a motor 15 The impeller 14, the connecting pipe 20 including the suction duct 21 and the exhaust duct 22 connected to the suction passage 11 and the exhaust passage 12 respectively, and the brush 23 formed at one end of the connecting pipe 20.

In the conventional backflow type vacuum cleaner having the above configuration, the air around the cleaning surface is sucked through the brush 23 by the rotation of the motor 15 and the impeller 14 . Then, the air passes through the suction duct 21 connecting the pipe 20 and the dust bag 13 , and foreign matter such as dust or dirt is absorbed and filtered out by the dust bag 13 .

After the foreign matter is filtered out by the dust bag 13, the air is discharged through the exhaust passage 12, the exhaust duct 22 and the brush 23. The exhausted air is sucked in again together with the dust or dirt surrounding the brushes.

However, conventional recirculation vacuum cleaners have such a structure that the air sucked through the brushes will cool the motor 15 during the cycle. At this time, since the air is exposed to the heat of the driving motor 15, the air is heated. As the heated air is drawn back into the vacuum cleaner, cooling becomes less and less effective. After the vacuum cleaner has been working for a long time, the working efficiency of the vacuum cleaner will be seriously impaired due to the heating of the motor 15 . The suction effect of the brushes is thus reduced, reducing the performance and efficiency of the vacuum cleaner.

The present invention has been developed to overcome the above-mentioned problems in the related art, and it is therefore an object of the present invention to provide a backflow type vacuum cleaner which improves the efficiency of the motor by improving the circulation path of the air sucked in and discharged from the vacuum cleaner by the rotational force of the motor. Cooling efficiency for improved cleaning performance and efficiency.

The above object can be achieved by a return type vacuum cleaner according to the present invention, which comprises: an impeller built in a vacuum cleaner body and rotated by a motor; an air suction passage and an exhaust passage, which are connected with The vacuum cleaner body is connected to define the circulation path of the air sucked by the rotating force of the impeller; a connecting pipe has a suction duct and an exhaust duct respectively connected to the suction and exhaust passages; a suction brush is connected with the The connecting pipe is connected; and the cooling part, which is installed between the suction and exhaust passages to cool the motor, the cooling part includes: a cooling chamber, which has a partition, and the partition divides the inner space of the cooling chamber in such a way a first space and a second space, so that the impeller is located in the first space and the motor is located in the second space; a cooling blower, which faces the impeller, is located in the second space and is connected with the motor, so that the outside air is directed toward the Motor and impeller suction.

The cooling part further includes: a grill, which is arranged on the vacuum cleaner body corresponding to the cooling blower, and the grill has a group of holes formed therein; and the second space to discharge the air sucked by the impeller and cooling blower.

Through the following detailed description in conjunction with the accompanying drawings, the above-mentioned and other objects and advantages of the present invention can be made clearer, and the accompanying drawings include:

Fig. 1 is a schematic diagram of a conventional backflow vacuum cleaner;

Figure 2 is a schematic diagram of a recirculation vacuum cleaner according to the present invention;

FIG. 3 is a schematic sectional view of the main part of the present invention, that is, the driving motor cooling portion in FIG. 2 .

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in Figures 2 and 3, the return type vacuum cleaner according to the present invention comprises: a body 100 with a suction passage 101 and an exhaust passage 102, a dust collection chamber 103 located in the suction passage 101, a driven motor 140 Drives the rotating impeller 130, a connection pipe 160 that is connected to the body 100 and includes a suction duct 161 and an exhaust duct 162 that are connected to the suction passage 101 and the exhaust passage 102 respectively, and a connecting pipe 160 formed at one end of the connection pipe 160 The brush 150 and a cooling part 200 installed between the suction and discharge passages 101 and 102 to reduce the temperature of the motor 140 .

Fig. 3 shows the cooling section 200 as a unique feature of the present invention, which includes a cooling chamber 210 formed between the suction and discharge passages 101 and 102 to accommodate the impeller 130 and the motor 140, a cooling chamber 210 arranged in the cooling chamber 210 and driven by the motor 140 to rotate the cooling blower 230 and a grid 250 corresponding to the cooling blower 230 arranged in the vacuum cleaner body 100 and having a group of holes 251 formed therein. Reference numeral 121 here denotes a dust bag for collecting foreign matter such as dust or dirt from the inhaled air.

According to the present invention, the cooling chamber 210 includes a partition 201 that divides the inner space of the cooling chamber 210 into first and second spaces 211 and 212 . The impeller 130 and the motor 140 are supported on the partition 201 in such a manner that the impeller 130 is located in the first space 211 and the motor 140 is located in the second space 212 . In addition, the cooling blower 230 is located in the second space 212 so as to be rotated by the motor 140 and suck external air through the hole 251 in the grill 250 .

Meanwhile, the first and second spaces 211 and 212 are connected to the exhaust passage 102 through first and second exhaust pipes 213 and 214, respectively. Here, since the first exhaust pipe 213 passes through the second exhaust pipe 214 , air exhausted from the first and second exhaust pipes 213 and 214 will merge in the exhaust passage 102 .

According to the present invention, it is preferable to make the diameter of the second exhaust pipe 214 larger than the diameter of the first exhaust pipe 213 .

In the recirculation type vacuum cleaner having the above configuration according to the present invention, when the vacuum cleaner is working, the air around the cleaning surface passes through the suction channel in the brush 150 under the strong suction force generated by the rotation of the motor 140 and the impeller 130. 151 and was inhaled. Then, the air passes through the suction duct 161 of the connecting pipe 160 to the dust bag 121, where foreign matter such as dust or dirt is absorbed and filtered out.

After the foreign matter is filtered out by the dust bag 121, the clean air passes through the first space 211 of the cooling chamber 210 and the first exhaust pipe 213, the exhaust passage 102, the exhaust duct 162 of the connecting pipe 160 and the exhaust passage of the brush 150 152 to discharge the vacuum cleaner. When the exhausted air is sucked again, the air will be sucked together with the foreign matters near the brush 150 through the suction channel 151 in the brush 150 and circulated along the aforementioned path.

Meanwhile, according to the present invention, when the cooling blower 230 rotates together with the impeller 130 , external air is sucked through the holes 251 in the grill 250 disposed on the vacuum cleaner body 100 . After being sucked, the external air will flow into the second space 212 of the cooling chamber 210 to cool the motor 140 . After that, the air flows into the first exhaust pipe 213 through the second exhaust pipe 214 and merges with the air discharged from the first exhaust pipe 213 . The combined air will pass through the exhaust channel 102 and the exhaust duct 162 of the connecting tube 160 , and be exhausted from the exhaust channel 152 of the brush 150 . The air exhausted from the body 100 will be sucked together with the foreign matter through the suction channel 151 in the brush 150 and circulated along the above-mentioned path.

As described above, in the return type vacuum cleaner having the air circulation process according to the present invention, the circulation paths of the cleaning process and the motor cooling process are determined independently, respectively. The air drawn in by the brushes 150 for the cleaning process is therefore substantially not exposed to the heated motor 140 during the cycle. In addition, since external air is always supplied to the cooling motor 140 by the cooling blower 230 through an independent circulation path, the motor is substantially not heated.

In the return type vacuum cleaner according to the present invention, by independently determining the circulation path of the cleaning process and the motor cooling process, that is, the air sucked from the brush for the cleaning process and the air sucked by the cooling blower for the motor cooling process are independently circulated. Air, heating of the motor can be prevented, thus cleaning performance and efficiency are significantly improved.

A preferred embodiment of the present invention has been shown and described above. Although a preferred embodiment of the present invention has been described, it is to be understood that the present invention is not limited to this preferred embodiment, and that those of ordinary skill in the art will be able to Various modifications and improvements were made.

Claims (4)

1. reverse-flow type vacuum cleaner, it comprises:

An impeller, it is built in the vacuum cleaner body, in order to rotation by a driven by motor;

An air intake passage and an exhaust passage, they link to each other with vacuum cleaner body, to stipulate out the circulating path of inhaled air by the impeller revolving force;

A tube connector, it has and is connecting air-breathing and aspirating air pipe and the discharge duct exhaust passage respectively;

An air-breathing brush, it links to each other with tube connector; And

Cooling device, its be loaded on air-breathing and the exhaust passage between with cooling motor, described cooling device comprises a cooling chamber, it has a dividing plate, dividing plate is divided into first space and second space with the inner space of cooling chamber by this way, and promptly impeller is arranged in first space and motor is arranged in second space; Described cooling device also comprises a cooling quench machine, and it is arranged in second space and links to each other with motor facing to impeller, so that extraneous air is aspirated towards motor and impeller.

2. vacuum cleaner as claimed in claim 1 is characterized in that described cooling device also comprises:

A screen work, it is placed on the vacuum cleaner body corresponding to the cooling quench machine, and screen work has one group of hole that is formed at wherein; And

Downtake pipe and second exhaust pipe, they lay respectively in first and second spaces, to discharge by impeller and cooling quench machine inhaled air.

3. vacuum cleaner as claimed in claim 2 is characterized in that air passes through second exhaust pipe at first by this way, so that the air that first and second blast pipes are discharged merges into one interflow.

4. as claim 2 or 3 described vacuum cleaners, it is characterized in that the diameter of second exhaust pipe is greater than the diameter of downtake pipe.

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