JP2002177179A - Air circulation type vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air circulation type vacuum cleaner provided with an exhaust adjusting device for adjusting an exhaust amount in accordance with the temperature of circulating air without deteriorating a dust collecting ability. SOLUTION: The air circulation type vacuum cleaner is characterized by arranging a temperature sensor 46 in a motor-driven blower 17 or in a circulation route and permitting an opening/closing motor 36 to perform the operation of the exhaust adjusting device for opening/closing an exhaust port step by step when temperature detected by the sensor exceeds a prescribed setting value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air circulation type vacuum cleaner for returning air exhausted by an electric blower to a suction port main body.

[0002]

2. Description of the Related Art As a configuration of a conventional air circulation type vacuum cleaner, the temperature of an electric blower is detected in order to prevent an abnormal rise in the temperature of an electric motor, and when the temperature exceeds a predetermined temperature, the electric blower of the electric blower is provided. There is known a configuration including means for reducing input to a unit. A configuration described in Japanese Patent Application Laid-Open No. 03-162814 is also known as a countermeasure for abnormal rise of the temperature of the electric unit.

[0003] The vacuum cleaner described in Japanese Patent Application Laid-Open No. 03-162814 is provided with a cooling means for lowering the temperature of air passing through the passage from the suction port to the exhaust port and at least a part of the recirculation trachea. As a means, a configuration is adopted in which a branch regulator is provided at the exhaust port to adjust the ratio between the amount of exhaust gas and the recirculation to lower the temperature of the circulating air.

[0004]

However, there is provided a means for detecting the temperature of the electric blower and reducing the input to the electric section of the electric blower when the temperature exceeds a predetermined temperature. The air circulation type vacuum cleaner has a problem that when the temperature of the circulating air rises, the power is reduced, the suction force is reduced, and the dust collecting ability is deteriorated.

Japanese Patent Application Laid-Open No. 03-162814 does not describe a specific adjustment method using a branch adjuster, and the one described in the same publication does not adjust the displacement in accordance with the temperature. Absent. For this reason, even when the ratio of the circulating air, that is, the circulation ratio is the same, for example, the temperature of the air circulating in the cleaner main body differs between winter and summer when the temperature of the outside air is different, so that the inside of the cleaner main body is different. There has been a problem that the temperature rise cannot be properly prevented. Specifically, in summer when the outside air temperature is high, if the circulation ratio is the same as in winter, it may not be possible to sufficiently prevent the temperature inside the cleaner body from rising. On the other hand, in winter when the outside air temperature is low, if the circulation ratio is the same as in summer, air is exhausted from the cleaner body more than necessary, and points where air is not exhausted, points where the suction port body does not stick to the surface to be cleaned, or exhaust air are covered. The advantage of the air circulation type vacuum cleaner, such as the fact that it can be used for collecting dust from the cleaning surface, is impaired.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides an air circulation type vacuum cleaner having a means for preventing an abnormal rise in the temperature of the vacuum cleaner body without impairing the advantages of the air circulation type vacuum cleaner as much as possible. Is to do.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, air is blown from a suction port of a suction port main body by the operation of an electric blower in a vacuum cleaner main body, and the suction is performed. After passing the air through the filter to capture dust and returning the air that has passed through the filter and has been discharged from the electric blower to the suction port main body through the return air path, the returned air is circulated for cleaning. In the air circulation type vacuum cleaner, an exhaust port communicating the return air passage with the outside, a temperature sensor for detecting the temperature of circulating air, and exhaust from the exhaust port according to the temperature detected by the temperature sensor. An air circulation type vacuum cleaner comprising an exhaust adjustment device for adjusting an amount.

According to the first aspect of the present invention, the amount of exhaust gas is adjusted according to the temperature of the circulating air without reducing the suction force unlike the means for reducing the input to the electric motor. It can be used as much as possible without impairing the advantages of air circulation type vacuum cleaner such as reduced exhaust, suction port body does not stick to the surface to be cleaned, and exhaust air can be used for dust collection. And the temperature rise of the vacuum cleaner can be prevented.

According to a second aspect of the present invention, the operation of the electric blower sucks air from the suction port of the suction port main body, passes the sucked air through a filter to capture dust, and passes through the filter to generate the electric power. After returning the air discharged from the blower to the suction port main body through the return air passage, in the air circulation type vacuum cleaner that performs cleaning while circulating the returned air, exhaust air that communicates the return air passage with the outside is provided. An air circulation type electric power supply, comprising: a port, a temperature sensor for detecting a temperature of the electric blower, and an exhaust adjustment device for adjusting an amount of exhaust from the exhaust port according to the temperature detected by the temperature sensor. It is a vacuum cleaner.

According to the second aspect of the present invention, the amount of exhaust is adjusted according to the temperature of the electric blower without reducing the suction force unlike the means for reducing the input to the electric motor. It can be used as much as possible without impairing the advantages of air circulation type vacuum cleaner such as reduced exhaust, suction port body does not stick to the surface to be cleaned, and exhaust air can be used for dust collection. The temperature of the vacuum cleaner can be prevented.

According to a third aspect of the present invention, there is provided the air circulation type vacuum cleaner according to the first or second aspect, wherein a return outlet for discharging the air returned to the suction main body to the suction main body; A rotary cleaning body that rotates by being blown with air discharged from the reflux discharge port.

According to the third aspect of the present invention, since the amount of circulating air is not unnecessarily reduced by the operation of the exhaust gas adjusting device for adjusting the amount of exhaust gas, there is an advantage as an air circulation type vacuum cleaner. It is possible to use as much as possible without impairing the reduction of exhaust air, the fact that the suction port body does not stick to the surface to be cleaned, the point that the exhaust air can be used for dust collection, and the temperature rise of the vacuum cleaner can be prevented. it can. Further, since the amount of air blown to the rotary cleaning body to rotate the rotary cleaning body of the suction port main body does not decrease more than necessary, there is also an effect that the driving force of the rotary cleaning body does not need to be significantly reduced.

According to a fourth aspect of the present invention, in the air circulation type vacuum cleaner of the first to third aspects, the exhaust adjusting device adjusts the amount of exhaust from the exhaust port in a stepwise manner. It is a circulation type vacuum cleaner.

According to the fourth aspect of the present invention, the amount of circulating air is not reduced more than necessary by adjusting the amount of exhaust from the exhaust port in a stepwise manner. The amount of air returning to the inlet body does not decrease unnecessarily. Therefore, the advantages of an air circulation type vacuum cleaner, such as reduced exhaust air, the fact that the suction port body does not stick to the surface to be cleaned, and the fact that the exhaust air can be used for dust collection, etc. can be used as much as possible without impairing cleaning. The temperature of the machine can be prevented from rising.

According to a fifth aspect of the present invention, in the air circulation type vacuum cleaner according to any one of the first to fourth aspects, the exhaust control device is capable of killing harmful microorganisms when the temperature of the circulating air or the temperature of the electric blower is high. An air circulation type vacuum cleaner characterized by adjusting an exhaust amount from the exhaust port so as to maintain a temperature range.

According to the fifth aspect of the present invention, not only the exhaust control device prevents the temperature of the cleaner body from abnormally rising but also suppresses the temperature from dropping below a predetermined value. For example, harmful microorganisms such as mites contained in dust captured during cleaning can be killed.

According to a sixth aspect of the present invention, in the air circulation type vacuum cleaner according to the fourth aspect, the temperature range is from 60 ° C to 60 ° C.
An air circulation type vacuum cleaner characterized by being set to 70 ° C.

According to the sixth aspect of the present invention, the exhaust adjustment device not only prevents the temperature of the cleaner body from becoming 70 ° C. or more, but also suppresses the temperature from dropping to 60 ° C. or less. This has the effect of reliably killing harmful microorganisms such as mites contained in the captured dust.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an air circulation type vacuum cleaner according to a first embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 2, the canister-type air-circulating vacuum cleaner according to the first embodiment includes a cleaner main body 1, a hose 15 having a grip portion, an extension pipe 16, and an inlet main body 100. And

As shown in FIGS. 1 and 2, the cleaner body 1 has a main body case 4 formed of, for example, a synthetic resin having an open front upper surface, and an opening on the front upper surface of the main body case 4 can be freely opened and closed. And a lid 5 made of, for example, a synthetic resin. Further, the main body case 4 is provided with a swivel wheel 6 that is rotatable on the front lower surface in the traveling direction, and a driven rear wheel 7 is mounted on the rear side.

In a vacuum cleaner main body, a dust collecting chamber 9 opened upward by a partition wall 8 having a grid-like communication port.
Is formed in the front part, and an electric blower room 10 is formed behind the dust collection chamber 9. In the dust collecting chamber 9, a dust collecting bag 12 is detachably mounted by a holder 11 pivotally mounted in the dust collecting chamber 9.
On the front surface of the partition 8, a first auxiliary dust collecting filter 13 that covers the grid-like communication hole is detachably mounted, and the filter, that is, the dust collecting bag 12 and the first auxiliary dust collecting filter 13 are attached to the dust collecting chamber. 9 through the upper opening. And lid 5
The rear end of the body case 4 is pivotally attached to the main body case 4 so as to open and close the dust collection chamber 9 from above.

At the front part of the main body case 4, a cylindrical suction port 14 is formed. The suction port 14 has a front end opening to the front of the cleaner body 1 and a rear end opening to the dust collection chamber 9. One end of a hose 15 is detachably inserted and connected. The suction port main body 100 is detachably connected to the end via an extension pipe 16.

On the other hand, an electric blower 17 is provided in the electric blower room 10. The electric blower 17 includes, for example, an electric unit 18 having an electric motor that rotationally drives a fan (not shown) with a rotor shaft, and a fan cover 19 that covers the fan.
And so on. An opening (not shown) is formed in the center of the fan cover 19, and an exhaust hole 21 is formed in the frame 20 of the electric unit. The electric blower 17 is also connected via a transmission line of the hose 15 to a manual operation means that can be controlled by a setting operation of the operation unit 22 disposed on the grip 43 of the hose 15.

The electric blower 17 has front and rear portions supported by support walls formed in the electric blower chamber 10 via a support 24. The intake of the electric blower is
As a result, the airtight communication with the dust collecting chamber 9 is made via the communication hole 25, the rectification chamber 26, and the communication hole 27. A circuit room 28 is defined above the electric blower room 10, and a circuit board 29 on which control means for controlling a driving state of the electric blower 17 is mounted is arranged in the circuit room 28.

Further, an exhaust chamber 30 communicating with the electric blower room 10 is defined by a partition wall 31 in the cleaner body 1 behind the electric blower room 10. An exhaust port 32 communicating with an exhaust hole 21 provided in the frame 20 of the electric unit via an exhaust chamber 30 is formed in the rear upper portion of the upper portion of the cleaner body case 4.

The partition wall section 31 is provided with a substantially cylindrical exhaust duct section 33. Further, the exhaust duct portion 33 is formed with an exhaust communication hole 34 opening to the electric blower room 10, and the electric blower room 10 and the exhaust room 30 are formed so as to communicate with each other. In addition, the partition wall portion 31 includes the exhaust duct portion 3
3 is opened and closed by opening and closing the end opening to the exhaust chamber side;
An exhaust port opening / closing means 37 is provided as an exhaust adjusting device including an opening / closing motor 36 which is an electric motor for opening and closing the exhaust duct section 33 by operating the exhaust valve 35. Therefore, by operating the exhaust valve 35, the exhaust port 32 can be opened and closed indirectly, and the exhaust side of the electric blower 18 is communicated or disconnected from the outside of the cleaner body.

At the bottom of the main body case 4, there is provided a circulation upstream hole 38 opening at one end toward the electric blower chamber 10 and a circulation downstream hole 39 opening at the other end of the main body suction port 14. A path 40 is provided.

The hose 15 has a hose portion 41 and an inlet 14 of the cleaner main body 1 provided at one end of the hose portion.
And a gripping portion 43 provided at the other end of the hose portion. The hose 15 includes a hose return air passage 113 connected to the main body return air passage 40 and a hose suction air passage 114 directly connected to the main body suction opening 14 therein. Part 44
And a grip 45 branching rearward from the communication pipe 44. The return air path described in the claims is a general term for the main body return air path 40 and the hose return air path 113. At the base end of the grip 45,
An operation unit 22 is provided for setting driving of an electric blower 17 in the cleaner main body 1 and a motor 102 for rotating a rotary cleaning body 101 provided in a suction port main body 100 described later.

A suction port main body 100 is detachably connected to the distal end of the grip portion 43 via an extension tube 16. In addition, not only the extension tube 16 but also accessories such as a suction port main body 100 or a crane or a furniture brush (not shown) can be attached to the distal end of the grip portion 43.

As shown in FIGS. 3 and 4, the suction port main body 100 has a nozzle case 103 which is long in the left-right direction. A suction chamber 105 formed in the nozzle case 103 to be longitudinally partitioned in the left-right direction and opening a suction port 104 on the lower surface.
A suction air passage chamber 106 partitioned and formed substantially at the rear of the center of the suction chamber 105, an outlet air passage chamber 107 partitioned on both sides of the suction air passage chamber 106, and one side of the suction chamber 105. Motor room 10 that is sectioned and accommodates motor 102
8 and the electric motor 1 formed on one side of
02 is connected to a substrate chamber 109 for accommodating a circuit board (not shown).
An air outlet duct chamber 110 is provided in communication with the air outlet 7. The blow-out duct chamber 110 has a blow-out hole 111 which serves as a reflux outlet and communicates with the suction chamber 105. The exhaust air blown out from the blowout hole 111 is blown to the blade of the rotary cleaning body 101 rotatably disposed directly below the blowout hole 111, and the rotary cleaning body 101 is rotated by the drive of the electric motor 102. Immediately thereafter, dust is sucked from the suction air passage chamber 106 through the suction port 104 while blowing up dust on the surface to be cleaned facing the suction port 104. The dust is sucked into the dust collecting chamber 9 of the cleaner body 1 due to the dust suction. Of course, the same effect can be obtained even if the rotary cleaning body has a configuration in which the blade is rotated only by the blowing air without using the electric motor, and
The same effect can be obtained by using other members such as brush bristles.

Next, an internal configuration related to control will be described. As shown in FIG. 5, the electric blower 17 arranged in the cleaner body 1 is connected to a commercial AC power supply from a power cord via a power control triac Tr.
The gate of the triac Tr is connected to a main body control unit mounted on a circuit board 29 housed in the cleaner main body 1.

The main body control means is provided with an exhaust port opening / closing means 37 as an exhaust control device by a signal from the main body control means.
Is connected to a valve driving power supply for supplying electric power to the opening / closing motor 36.

In the exhaust control apparatus of the present invention, for example, a temperature sensor 46 is used. The temperature sensor 46 has a temperature detecting unit such as a thermocouple whose voltage changes in proportion to the temperature. The temperature detecting unit is arranged in contact with the electric blower 17. The temperature sensor 46 detects the temperature of the electric blower 17 and outputs an output signal that changes according to the change in the temperature to the main body control means. When it is determined that this is the case, the opening / closing motor 36 of the exhaust port opening / closing means 37 is controlled.

Although the temperature detecting section of the temperature sensor 46 has been described as being in contact with the electric blower 17 to detect the temperature of the electric blower, for example, the temperature detecting section may be connected to the hose suction air passage 114 and the main body. The opening / closing motor may be controlled by being disposed in the return air passage 40, the hose return air passage 113, the exhaust chamber 30, the electric blower room 10, and the like, detecting the temperature of the circulating air. It should be noted that an indirect temperature sensing device that operates in accordance with the temperature of the circulating air or the electric blower without using a temperature sensor may be used.

An electric motor drive power supply for supplying electric power to the electric motor 102 in the suction port main body 100 by a signal from the main body control means is connected to the main body control means. In addition, a manual operation means as an operation means for outputting a predetermined current value by a setting operation of the operation section 22 disposed on the grip section 43 of the hose 15 via the transmission line of the hose 15 is also connected.

The cleaning operation of the above embodiment will be described.

During normal cleaning, that is, when cleaning is performed with the cleaner main body 1 supported on the floor surface by the turning wheel 6 and the driven rear wheel 7, the lid 5 is closed and the power cord is , A commercial AC power supply is supplied, and a hose 15, an extension pipe 16, and a suction port body 1 are connected to the suction port 14 of the cleaner body 1.
00 are sequentially connected. Then, the operation unit 22 of the hose 15
By setting the driving state of the electric blower 17 or the electric motor 102 of the suction port main body 100 by the operation of, the electric blower 17 or the electric motor 102 is driven by the supplied electric power,
The cleaning is performed by pushing the gripping portion 43 of the hose 15 on the extension pipe 16 side to move the suction port main body 100 on the floor surface.

When the electric blower 17 is driven, dust is sucked from the suction port main body 100 together with air, and the dust is drawn into the extension pipe 1.
6. The air is guided to the dust collecting chamber 9 of the cleaner main body 1 through the hose suction air passage 114 and is captured in the dust collecting bag 12. In addition, the air filtered by the dust bag 12 is sucked from the intake port of the electric blower 17 through the first auxiliary dust filter 13 and the communication hole 27, passes through the inside of the electric blower 17, and The exhaust air is exhausted from the exhaust holes 21 into the electric blower room 10 as exhaust air. The exhaust air discharged into the electric blower chamber 10 is rotated from the circulation upstream hole 38 to the main body return air passage 40, the suction port 14 of the cleaner body 1, the hose return air path 113, the extension pipe 16, and the suction port main body 100. The air is guided to the outlet air passage chamber 107 through a pipe or the like. When the electric motor 102 is driven by the setting operation of the manual operation means to rotate the rotating cleaning body 101 through the blowing hole 111 serving as the recirculation outlet through the blowing duct chamber 110, the blade of the cleaning body 101 is rotated. The dust is scraped from the floor surface by the blade by assisting the rotation of the rotary cleaning body 101. Immediately thereafter, the dust blown up to the surface to be cleaned blows up dust, and the dust blown up or scraped out is sucked again from the suction air passage chamber 106 together with the exhaust air, and collected through the hose suction air passage 114. It is captured by the dust bag 12 in the chamber 9. The circulation of the exhaust air causes the suction port body 100
There is no increase in the negative pressure in the interior, and it is possible to prevent the suction port main body 100 from sticking to the floor surface and to prevent the traveling performance from being reduced, and to easily perform cleaning. In addition, there is an advantage that dust and dust are prevented from being scattered by reducing the exhaust wind, and exhaust noise is reduced.

When the temperature detected by the temperature sensor 46 disposed in contact with the electric blower 17 in the exhaust port opening / closing means 37, which is an exhaust adjusting device, does not reach a predetermined set value, The exhaust valve closes the exhaust duct section 33, and the electric blower chamber 10 and the exhaust chamber 30 are in a non-communication state. Therefore, the circulation path is in a state of being isolated from the outside. On the other hand, when the temperature detected by the temperature sensor 46 reaches a predetermined set value, the temperature sensor 46 outputs a predetermined output signal, and the main body control means drives the exhaust valve opening / closing motor 36 based on the output signal. In this configuration, the exhaust duct 33 is controlled to be opened.

As described above, according to the temperature detected by the temperature sensor 46 disposed in contact with the electric blower 17, the opening / closing motor 36 is driven and the exhaust valve 35 is opened to heat the electric blower 17 or the like. A part of the obtained air is exhausted from the exhaust port 32. Part of the circulating wind flows into the exhaust chamber 30 from the exhaust communication hole 34 via the exhaust duct 33 without flowing into the main body recirculation air path 40 due to airflow resistance, and is exhausted from the exhaust port 32 to the outside air. Does not circulate. Therefore, since outside air is sucked in from the suction port of the suction port main body, the temperature of the air in the circulation path can be reduced. Further, when the temperature detected by the temperature sensor reaches a set value, the exhaust valve 35 closes, which is an advantage of the air circulation type vacuum cleaner in that there is no exhaust, that the suction port body does not stick to the surface to be cleaned, and that the exhaust air There is an effect that the point that can be used for dust collection is not spoiled.

Here, the operation of the exhaust valve 35 used in the exhaust port opening / closing means 37 as the exhaust adjusting device of the present embodiment will be described in detail. The exhaust valve 35 can be opened in a plurality of stages by an opening / closing motor 36 which is a stepping motor, and has a configuration in which, for example, 15 ° is one stage and a maximum of four stages, that is, 60 ° is opened. For example, when the temperature of the electric blower 17 reaches 70 ° C., the temperature sensor 46 outputs a predetermined output signal, and the opening / closing motor 36 is driven by the control means based on the output signal, and the exhaust valve 35 changes from the closed state to 1 °. It is held in a step, ie, 15 ° open state. The timing at which the main body control means outputs the signal for operating the opening / closing motor 36 based on the signal from the temperature sensor 46 is set to a predetermined interval. Therefore, when the temperature was detected one minute after the temperature detection, when the temperature of the electric blower 17 reached 70 ° C. again, the exhaust valve 35 was opened by one step, 15 °, and then further opened by one step, 15 °. Open,
It is held in a state of being opened at 30 degrees for a total of two stages. If the temperature of the electric blower 17 is lower than 70 ° C.,
Closes one step, 15 °, and returns to the state of not being opened at all.

By adjusting the amount of exhaust gas in a stepwise manner and by providing an exhaust port on the recirculation side, it is possible to prevent the temperature of the inside of the cleaner body or the electric motor from rising, and to provide the inside of the air circulation type vacuum cleaner. This has the effect of preventing the amount of air circulating through the air from suddenly decreasing. Thereby, the circulated air blows out from the outlet 111 of the suction port main body, which is the reflux outlet, toward the blade 112 of the rotating cleaning body 101, and when the air blown to the blade 112 is assisted in rotating the cleaning body 101. Since the amount does not decrease significantly, the cleaning body 10
This prevents a sudden load from being applied to the electric motor 102 rotating the motor 1. Also, when blowing dust from the floor,
Since the amount of air to be blown is not significantly reduced, the suction force is prevented from being reduced, and the operability is prevented from deteriorating due to the suction port body 100 sticking to a floor or the like due to an increase in negative pressure.

When the temperature of the electric blower 17 is lower than the predetermined set value and the exhaust valve 35 is not opened at all,
It cannot be closed anymore. In addition, the electric blower 17
When the temperature is equal to or higher than the predetermined set value, the exhaust valve 35 cannot be opened any more when the exhaust valve 35 is opened to the maximum. Therefore, before or after the temperature is detected, a process of confirming the open / closed state of the exhaust valve 35 may be required. When the exhaust valve 35 is not open at all and the temperature of the electric blower 17 is lower than a predetermined set value, the open / close motor 36 remains stopped. When the temperature of the electric blower 17 is equal to or higher than a predetermined set value in a state where the exhaust valve 35 is fully opened, in order to prevent a danger such as burning of the electric part while the opening / closing motor 36 is stopped. It is necessary to consider taking safety measures such as stopping the input to the electric motor of the electric blower 17.

Next, a description will be given of the exhaust port opening / closing means 37 as an exhaust adjusting device for performing the operation of the exhaust valve stepwise so that the temperature of the electric blower 17 maintains a predetermined temperature range. The temperature range refers to a temperature range from, for example, 50 ° C. to 70 ° C., preferably from 60 ° C., which is a temperature at which mites are killed in a short time, to 70 ° C. which can reliably prevent thermal deformation of the resin-made vacuum cleaner body. . When the temperature of the electric blower 17 is 70 ° C. or more,
The temperature sensor 46 outputs a predetermined output signal, and based on the output signal, the opening / closing motor is driven by the main body control means. Unless the exhaust valve 35 is completely opened, the exhaust valve 35 is opened by one step, for example, 15 ° from the current state. It is kept in the state. Alternatively, when the temperature of the electric blower 17 is equal to or lower than 60 ° C., the temperature sensor 46 similarly drives the opening / closing motor 36, and the exhaust valve 35 is closed by one step, 15 ° from the current state unless the exhaust valve 35 is completely closed. It is kept in the state. 60 ° C-70
If the temperature is between 0 ° C., the opening / closing motor 36 is stopped to maintain the current state, thereby preventing frequent operation of the exhaust valve 35 and suppressing power consumption. There is an effect that it is possible to maintain the temperature at which the killing occurs.

In the above embodiment, a canister-type air circulation type vacuum cleaner for cleaning by connecting a hose, an extension pipe and a suction port body to the cleaner body has been described. The same effect can be obtained in any configuration such as an upright type or a handy type in which the suction port main body is directly connected to the suction port main body, or a configuration in which the suction port main body is connected to the suction port main body via the suction port. Further, the air-circulation type vacuum cleaner is not limited to a vacuum cleaner which always returns all exhaust gas.

Further, in the embodiment of the present invention, a shape memory alloy which changes its shape depending on the temperature has a role of detecting the temperature as an exhaust adjusting device and a function of adjusting the amount of exhaust from an exhaust port according to the detected temperature. The following may be used.

In addition to closing the end of the exhaust duct with the exhaust valve, opening and closing the exhaust communication hole of the exhaust duct,
The exhaust port may be directly opened and closed without providing the exhaust duct section or the partition wall section.

Further, the opening / closing by the exhaust valve is not only rotation but also rotation
An operation method such as sliding movement may be used. Any configuration can be appropriately changed without departing from the gist of the present invention.

[0049]

According to the first aspect of the present invention, the amount of exhaust gas can be adjusted according to the temperature of the circulating air without reducing the suction force. Therefore, it is possible to use the air circulation type vacuum cleaner as much as possible without impairing the advantages of reduced exhaust air, the fact that the suction port body does not stick to the surface to be cleaned, and that the exhaust air can be used for dust collection. In addition, the temperature of the vacuum cleaner can be prevented from rising.

According to the second aspect of the present invention, there is an effect that the displacement can be adjusted without reducing the suction force and according to the temperature of the electric blower. Therefore, it is possible to use the air circulation type vacuum cleaner as much as possible without impairing the advantages of reduced exhaust air, the fact that the suction port body does not stick to the surface to be cleaned, and that the exhaust air can be used for dust collection. In addition, the temperature of the vacuum cleaner can be prevented from rising.

According to the third aspect of the invention, there is an effect that the exhaust amount can be adjusted without reducing the suction force and according to the temperature detected by the temperature sensor. Therefore, it is possible to use the air circulation type vacuum cleaner as much as possible without impairing the advantages of reduced exhaust air, the fact that the suction port body does not stick to the surface to be cleaned, and that the exhaust air can be used for dust collection. In addition, the temperature of the vacuum cleaner can be prevented from rising. Also, since the amount of air blown to the blade for rotating the rotary cleaning body of the suction port main body does not decrease extremely, there is also an effect of preventing the driving force of the rotary cleaning body from remarkably decreasing.

According to the fourth aspect of the present invention, since the amount of circulating air does not decrease more than necessary by adjusting the amount of exhaust air from the exhaust port in a stepwise manner, the exhaust gas returns to the suction port main body. The amount of air does not decrease more than necessary. Therefore, it is possible to use as much as possible the advantages of air circulation type vacuum cleaner, such as reduction of exhaust air, suction port body does not stick to the surface to be cleaned, and exhaust air can be used for dust collection. In addition, the temperature of the vacuum cleaner can be prevented from rising.

According to the fifth aspect of the present invention, since the temperature does not rise above a predetermined value by the exhaust adjustment device, not only the abnormal rise of the temperature of the cleaner body but also the temperature falls below the predetermined value. Because of this, there is an effect that harmful microorganisms such as mites can be killed.

According to the sixth aspect of the present invention, not only does the exhaust control device prevent the temperature of the cleaner body from rising to 70 ° C. or more, but also to prevent the temperature from dropping to 60 ° C. or less. This has the effect of reliably killing harmful microorganisms such as mites contained in the captured dust.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view of a cleaner main body according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing one embodiment of the present invention.

FIG. 3 is a cross-sectional view of the suction port main body according to the embodiment of the present invention as viewed from below.

FIG. 4 is a side view showing the suction port main body according to the embodiment of the present invention as viewed from the side.

FIG. 5 is a block diagram illustrating a circuit configuration according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 9 Dust collection chamber 13 Filter 14 Suction port (Main body) 15 Hose 16 Extension pipe 17 Electric blower 30 Exhaust chamber 32 Exhaust port (Main body) 35 Exhaust valve 36 Opening / closing motor 37 Exhaust port opening / closing means 40 Main body recirculation air path 42 Connection tube 43 Gripping part 45 Gripping part 46 Temperature sensor 101 Rotary cleaning body 112 Blade

Claims (6)

[Claims] 1. The operation of an electric blower sucks air from a suction port of a suction port main body, passes the sucked air through a filter to capture dust, and passes through the filter to discharge air from the electric blower. After returning to the suction port main body through the return air path, in an air circulation type vacuum cleaner that performs cleaning while circulating the returned air, an exhaust port communicating the return air path with the outside circulates. An air circulation type vacuum cleaner comprising: a temperature sensor for detecting a temperature of air; and an exhaust gas adjusting device for adjusting an amount of exhaust air from the exhaust port according to the temperature detected by the temperature sensor. 2. The operation of the electric blower sucks air from a suction port of a suction port main body, passes the sucked air through a filter to capture dust, and passes through the filter to discharge air from the electric blower. After returning to the suction port main body through the return air path, and cleaning while circulating the returned air, an exhaust port communicating the return air path with the outside, an electric blower An air circulation type vacuum cleaner, comprising: a temperature sensor for detecting the temperature of the exhaust gas; and an exhaust adjustment device for adjusting an amount of exhaust from the exhaust port according to the temperature detected by the temperature sensor. 3. The air circulation type vacuum cleaner according to claim 1, wherein a return outlet for discharging the air returned to the suction main body to the suction main body, and a discharge from the return discharge outlet. And a rotating cleaning body that rotates by being blown by the air to be blown. 4. The air circulation type vacuum cleaner according to claim 1, wherein said exhaust adjustment device adjusts the amount of exhaust air from said exhaust port in a stepwise manner. 5. The air circulation type vacuum cleaner according to claim 1, wherein the exhaust gas adjusting device controls the temperature of the circulating air from the exhaust port so as to maintain a temperature range in which harmful microorganisms can be killed. The air circulation type vacuum cleaner characterized by adjusting the displacement of the air. 6. The air circulation type vacuum cleaner according to claim 5, wherein the temperature range is 60 ° C. to 70 ° C.