JPH01223916A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To kill or damage harmful microorganism such as a tick by heat without deteriorating a hose and to prevent the loss of parts with a good operability by forming an exhaust circulating air passage communicating with the exhaust side of an electric blower and the connecting port of a dust collecting chamber in a main body case and a cover body. CONSTITUTION:When microorganism such as a tick in dust stored in a dust collecting chamber 20 is killed and damaged and strilized, a hose is kept removed from a connecting port 55. A handle part 70 is held to raise an opening and closing plate 68, open an exhaust circulating air passage 66 and communicate the exhaust side of an electric blower 26 with the dust collecting chamber 20. A part of the heated exhaust air from the electric blower 26 is circulated to the dust collecting chamber 20 through the exhaust circulating air passage 74, 66, the opening and closing plate 68, a communicating part 67 and the connecting port 55 to generate a circulating air current from the electric blower 26 to the electric blower 26 again through the exhaust circulating air passages 74, 66 and the dust collecting chamber 20. Thus, the circulating air current is repeatedly heated by the electric blower 26, whereby a temperature is raised in the dust collecting chamber 20 and reaches to about 50 deg.C capable of killing the harmful microorganism such as the tick.

Description

Detailed Description of the Invention (Objective of the Invention) (Industrial Field of Application) The present invention relates to electrical extinguishing, and particularly relates to an extinguishing mechanism that uses heat to kill harmful microorganisms such as mites contained in dust. .

(Prior art) Conventionally, in vacuum cleaners that can kill harmful microorganisms such as mites, for example,
As stated in Publication No. 6, from the exhaust side of the electric blower with a hose! A structure is adopted to form an electric circulation air path leading to the dust chamber, and by repeatedly circulating the heated exhaust air into the dust collection chamber and raising the temperature inside this dust collection chamber, f4 m is performed. ing. However, with this conventional structure, the hose, which is formed into a bellows-like shape using a thin coating made of soft vinyl chloride resin, is repeatedly exposed to high temperatures of about 50 to 60 degrees Celsius, which causes the hose to become distorted. This hose for sucking in dust becomes difficult to use.

Furthermore, vacuum cleaners in which an exhaust circulation air passage is formed within the itch removal body are also known. In this conventional vacuum cleaner, the main body consists of a main body case and a hose connection port, which opens and closes the collection V chamber, but the exhaust circulation air path is located near the connection. During normal decontamination, the exhaust circulation air path is closed off with a hose connected to the one-person connection port, and during disinfection, the hose is removed and the air circulation path is connected to the dust collection chamber. A structure is adopted in which the connection port is also equipped with a separate detachable closure body to close the connection port.

However, with this conventional structure, it is necessary to store the removable closure, and there is a risk of losing the closure.

(Problems to be Solved by the Invention) As described above, in conventional vacuum cleaners, since the exhaust gas circulation air path is formed by a hose, there is a problem that the hose deteriorates due to heat. In addition, since the conventional electric 1+m rock removal device had an exhaust circulation air path formed within the vacuum cleaner body, and had a separate removable blocker, there were problems such as the blocker being easy to lose.

The present invention aims to solve these problems by using heat to kill harmful microorganisms such as mites without causing any deterioration of the hose. There is a product C whose purpose is to provide two vacuum cleaners without one. Furthermore, it is an object of the present invention to provide 1♀ electric shock compensation that can stably cause y1 damage from EJ harmful substances regardless of the outside temperature and the like.

[Structure of the invention]

(Means for Solving the Problems) The vacuum cleaner of the present invention is provided with an electric blower and a dust collection chamber communicating with the intake side of the electric blower hall, and a part facing the dust collection chamber. The main body case has a connection port to which a hose is detachably connected, and the opening of the main body case can be opened and closed. An electric circulation air path is formed that communicates the n-air side with the connection port of the dust collection chamber, and a part of the air circulation air path is opened and closed at a position near the connection port of the lid body. A wind passage opening/closing means that can be controlled externally is provided.

Further, in a vacuum cleaner in which an opening/closing means for opening and closing the connection port is movably supported on the lid body, an air passage closing part that blocks the exhaust gas circulation air passage when the connection port is opened is provided in the first stage of opening/closing the connection port; A communication part may be provided to open the exhaust circulation air passage when the opening is closed and communicate the exhaust side of the electric blower with the dust collection chamber, and the connection opening opening m means may also be used as the air passage opening/closing means. .

Furthermore, a temperature sensing element whose output varies depending on the temperature may be provided in the air path through which the exhaust air passes within the cleaner body, and this temperature sensing element may be connected to a control circuit that variably controls the input of the electric blower.

(For fishing) In the vacuum cleaner according to claim 1 of the present invention, during normal cleaning, etc., a part of the exhaust circulation path is closed by the air path opening/closing means provided on the lid body, and the electric blower is turned off. The active side and the dust collection room are kept isolated.

On the other hand, when killing harmful microorganisms such as dust mites in the dust accumulated in the east bank room, operate the air passage opening/closing means to open the exhaust circulation air passage and communicate the exhaust side of the electric blower with the dust collection room. It is written in the state of being. In this state, electric transport J! When III is driven, the heated initial air from this electric blower is returned to the east IJJ room from the connection port of the lid via the main body case and the exhaust circulation air path inside the lid, and the temperature in the east bank room decreases to 1. The mites in the egg-collecting chamber are killed by being swallowed.

In addition, in the vacuum cleaner of claim 2, when the hose is connected to the connection port F1 during local removal, the connection port is kept in an open state, but in this state, the air path of the connection port opening/closing means is The rIl blockage is blocking a part of the exhaust circulation j air path,
The exhaust side of the electric blower and the dust collection chamber are cut off. On the other hand, when the dust collection chamber is not in use, the connection port opening/closing means is moved to prevent the leakage of dust from the dust collection chamber to the outside through the connection port and to improve the appearance. Although the port is closed, in this state, the communication part of the connection port opening/closing means opens the exhaust circulation J air path, and the exhaust side of the electric blower and the dust collection chamber are communicated with each other. Therefore, if the electric blower is driven in this state, the bleed air from the electric blower will be returned to the dust collection chamber.

Furthermore, in the electric maintenance machine of claim 3, when the exhaust air is being circulated, the temperature sensing element in the air path through which the bleed air passes senses the temperature of the exhaust air and outputs an electric signal according to this temperature. The signal is output to a control circuit, and this control circuit controls the human power of the electric feeder 14113 according to the input electric signal. This $11'a
For example, the lower the sensed temperature, the lower the input to the electric blower so that the temperature of the recirculated air reaches a constant level on a constant basis, regardless of the outside temperature.

(Embodiment) Hereinafter, the configuration of an embodiment of the vacuum cleaner of the present invention will be described based on FIGS. 1 to 3.

In FIGS. 1 and 2, reference numeral 11 denotes a cleaning main body, which includes a main body case 13 having an opening 12 formed in the front side, and a rear end portion attached to this main body case 13, so that the opening 12 can be opened and closed. It consists of a dust collection chamber lid body 14 that closes the dust collection chamber. Further, the main body case 13 includes a lower main body case member 15 and an upper main body case member 16 that is coupled and fixed to the upper rear portion of the lower main body case member 15. The inside of the main body case 13 is divided into front and rear parts by a partition wall 18 formed almost in the center of the case and on the right side of a loop-shaped communication [117], and the space behind this partition wall 18 is The air blower is connected to the air blower 19, and the space in front is a dust collection chamber 20 facing the first part 12.

In the electric blower 9, support walls 21 and 22 are formed on both the main body case members 15 and 16.
．． An electric blower i26 is supported and fixed with its intake side facing the communication port 17 by a rubber front support member 24 and a rear support member 25 which are sandwiched by the rubber members 23 from above and below. Note that the ring-shaped front support body 24 airtightly partitions the electric blower 26 from the intake side and the extraction side. Furthermore, an inner exhaust port 27 that communicates with the exhaust side of the electric blower ^26 is formed on the rear surface of the main body case 13, and an exhaust cover integral 28 that covers the inner exhaust port 27 so as to be openable and closable is provided. The exhaust cover integrally 28 has an outer ventilation port 29 formed therein.

An exhaust filter 30 is disposed 8 between these exhaust ports 27 and 29.

Furthermore, a cord reel 32 (shown in FIG. 3) for winding up a power cord 31 for feeding power to the electric blower 26 is attached to the rear part of the main body case 13, and the tip of the power cord 31 is connected to the cord reel 32 (shown in FIG. 3). A plug 33 is connected to.

Further, an accessory storage section 34 is formed on the rear upper surface of the main body case 13, and a storage chamber cover integral 35 that covers the accessory storage chamber 34 so as to be openable and closable is pivotally attached thereto.

Further, a dust filter 41 is installed in the dust collection chamber 20 to cover the communication port 17, and a support frame 42 is pivotally attached to the front F section. 43 is the dust collection chamber 2
This dust collection bag 43 is a dust collection bag that is detachably attached to the inside of the bag.
It consists of a bag-like filter medium 44 and a mouth frame 45, and this mouth frame 45 is detachably held by the support frame 42. Furthermore, a seal backing 46 is provided around the entire periphery of the opening 12 facing the trPJ chamber 20 to which the periphery of the lower surface of the lid 14 is brought into close contact with the lower surface of the lid 14 so as to be able to freely come and go. The rear part of this seal backing 46 is sandwiched between the partition walls 18 of both the main body case members 15, 16. Further, a locking protrusion 4 is provided on the upper front surface of the main body case 13.
7 is formed.

The benefit body 11% has a case-like outer body member 51 with an opening on the lower surface, and a screw 5 on the lower side of this outer body member 51.
2, etc., and a plate-shaped inner lid member 53 that is connected and fixed with a seal backing 54 at the joint portion of both the five-body members 51 and 53. and,
A hose (not shown) is provided at the front of the outer lid member 51.
A cylindrical connection port 55 into which one end is removably inserted.
is formed downward and inclined. On the other hand, a suction opening 56 is formed in the inner lid member 53 so as to face the connection port 55 . A connection port packing 57 is provided from the lower end peripheral edge of the connection port 55 to the peripheral edge of the suction opening 56. Further, a recess 58 that opens outward is formed on one side of the connection port 55, and a pair of through holes 59 are formed in the bottom surface of this recess 58.

Then, facing these through holes 59, both δ body members 51 and 53
A pair of contact plates 60 are provided in the space between them, with which a pair of contact pins 61 (shown in FIG. 3) provided at one end of the hose come into contact with each other so as to be able to come and go.

Further, a spring 62 is attached to the front surface of the lid body 14 to provide f.
A fixed clamp 63 is also pivoted, and this clamp 63 is removably engaged with the engaging protrusion 47 of the main body case 13, thereby holding the six bodies 14 in an open state.

Further, the space between the two swallow body members 51 and 53 serves as a lid side bleed air circulation air passage 66, and this tillage circulation air passage 6
A cylindrical communication port 67 is formed on the side of the connection port 55 facing the connection port 6 . A support rib 69 is formed on the inner F body member 53, and an opening/closing plate 68 is formed on the inner F body member 53 to be slidable up and down along the opening end of the communication port 67. A flow opening 68a is formed in the lower part of the opening/closing plate 68, which is supported by J3 and is overlapped with the flow opening 67.

Further, one end of the opening/closing plate 68 is used as a knob 70.
The opening/closing plate 6 in this outer rose body part shrine 51 penetrates through the upper surface of the outer rose body part 51 and projects to the outer buno.
A seal backing 71 is installed in the n active part of 8. Furthermore, an inflow lower 2 facing the exhaust circulation air passage 66 is formed with a frontage on the rear surface of the slot 14 facing the partition 18 on the +jQ surface of the upper body case member 1G. A seal backing 73 is provided on the peripheral edge portion, and is brought into close contact with the partition wall 18 of the upper body case member 16 when the integral body 14 is closed.

On the other hand, on the front upper side of the upper body case member 16,
A main body side 1-1 air circulation air passage 74 that communicates with the exhaust side space of the electric blower 26 in J3 is formed in the electric blower support 19, and the front end of this circulation air passage 74 at first glance is An outflow lower 5 is opened in the partition wall 18 of the upper main body case member 16, and the inflow lower 2 of the lid 14 is superimposed on the outflow lower 5 at the time m of the lid 14.
The seal backing 73 of the inflow lower 2 is brought into close contact with the peripheral edge of the outflow lower 5. Note that this seal backing 73 is attached to the outflow lower part 5 of the main body case 13.
It may be placed on the side.

Furthermore, a thermostat 77 such as a bimetallic switch is disposed in the exhaust air circulation air passage 66 of the lid 14 and has a reset button 76, and is normally closed and opens when the temperature exceeds a predetermined temperature and returns to the closed state by operating the reset button 76. The reset button 76 of this Mostat 77 is exposed on the top surface of the lid 14. Further, a positive direction thermistor 78 as a temperature sensing element is disposed in the upper part of the electric feed chamber 19 of the main body case 13. Note that this thermistor 78 may be disposed within the cover-side antagonistic air circulation air passage 66 or the dust collector 20. The same applies to the thermostat 77.

Next, i, which variably controls the input of the electric blower 26;
The configuration of the 1I111 circuit 81 will be explained with reference to FIG.

A triac 85 having a snubber circuit as a protection circuit consisting of a fuse 82, a resistor 83, and a capacitor 84 connected to both poles of the power cord 31 connected to a commercial AC power source, the electric blower 26, and a thermostat 77 are mounted in the west row. This electric fan 26 is connected to a WtB prevention circuit 86 consisting of a capacitor.

The primary winding of a step-down transformer 87 is connected to the power source 31, and a rectifier circuit 88 consisting of a diode bridge is connected to the secondary winding of this transformer 81. A constant voltage circuit consisting of a resistor 89 and a Zener diode 90 is connected to the output side.A resistor 91 and a resistor 92 are connected in parallel and in series with the Zener diode 90. The gate of a PUT 93 is connected to the connection point of the resistor 92, and this PJ
The cathode of JT93 is connected to one end of the primary winding of transformer 94. The anode of the PUT 93 and the transformer 9
A charging capacitor 95 is connected between the other ends of the primary windings 4 and 4.

Further, a resistor 96 and a diode 97 are connected to the secondary winding of the transformer 94, and are connected to the gate of the triac 85.

The connection point of the resistors 89 and 91 and the resistor 98 connected to the P(1) 93 are respectively connected to a pair of switches 99a of a changeover switch 99. 1 switching contact 99b is connected to the pair of contact plates 6
0, respectively. Further, the positive direction thermistor 78 is connected between the pair of second switching contacts 99C of the switch 99.
is connected to C. Further, a variable resistor 100 is connected between the pair of contact pins 61 of the hose, and is provided in a grip portion of the hose so as to be externally operable.

The switch 99 may be operated by the user, or may be operated in conjunction with the opening/closing plate 68, for example. In other words, when the exhaust circulation air passage 66 is closed, the switch 9
9a may be brought into contact with the first switching contact 99b, and when opened, the switching element 99a may be brought into contact with the second switching contact 99c.

Next, the operation of the above embodiment will be explained.

During normal cleaning, one end of the hose is connected to the connection port 55, and a suction port body is connected to the grip at the other end of the hose via an extension pipe or the like. Also, as shown in Figure 2,
The opening/closing plate 68 is lowered to close the active circulation air passage 66, and the air collection chamber 20 and the active side of the electric blower 26 are cut off.

At the same time, the switch 99 is kept in a state in which the switching element 99a touches the first switching contact 99b. Then, by driving the electric blower 26, the dust sucked in with the airflow from the suction port body is guided to the dust collection chamber 20 via the extension pipe and hose, and is stored in the dust collection bag 43. On the other hand, the airflow that has passed through the dust collection bag 43 passes through the dust collection filter 41, the communication port 17, the electric kite sending chamber 19, the inner exhaust port 27, and the exhaust filter 30, and is then filtered out to the outer side 29.

In addition, during use, the input to the electric blower 26 can be adjusted by operating the variable resistor 100 on the grip of the hose, thereby adjusting the suction force. This electric blower 26 is controlled by il
The operation of the tI control circuit 81 will now be described.

When the resistance value of the variable resistor 100 is increased, the capacitor +
Since the charging time of TRIAC 195 becomes longer, the time to turn ON of PUT 93, which is turned on when the voltage of node 7 exceeds the gate voltage set by resistor 91 and resistor 92, is delayed, and the phase control angle of the trigger of TRIAC 85 is delayed. increases, the electric power supplied to the electric blower 26 decreases, and the input to the electric blower 26 decreases.

On the other hand, when the resistance value of the variable resistor 100 becomes smaller, the charging time of the condenser 95 becomes shorter, so the trigger phase control angle of the triac 85 becomes smaller and the electric blower 1i26
input increases.

Also, when disinfecting by killing harmful microorganisms such as mites in the dust accumulated in the f:M room 20, connect the hose to the connection port 5.
Remove it from 5. At the same time, the user picks up the knob 70 to raise the opening/closing plate 68 to open the exhaust circulation air passage 66, thereby bringing the air-containing side of the electric blower 26 and the dust collection chamber 20 into communication. Furthermore, the switch 99 brings the switching element 99a into contact with the second switching contact 99c.

Then, the electric blower 8a machine 26 is driven, and a part of the heated exhaust air from this electric blower 26 is transferred to the exhaust fI.
The air is returned to the dust collection chamber 20 through the circulation path 74, 66, the opening/closing plate 68, the circulation port 67, and the connection port 55, and then the electric blower 26
A circulating airflow is generated from the air circulation path 74.66 and the dust collection chamber 20 to reach the electric blower 1a26 again.

In this way, as the circulating airflow is repeatedly heated by the electric blower 26, the temperature within the dust collection chamber 20 rises and reaches 50° C. or higher, which is sufficient to kill harmful microorganisms such as mites.

When the circulating exhaust air reaches a certain temperature of about 55 to 60 degrees Celsius, the thermostat 77 opens and the electric
u1 machine 26 is automatically created. Thermostat 7: Dust mites die in 2 to 3 minutes at temperatures above 50°C.
If 1 is opened at the above-mentioned temperature, mites can be sufficiently killed.

By the way, when the circulating airflow is generated as described above, a certain amount of outside air also flows into the collection chamber 20 through the connection port 55, but even if the outside air flows in this way, the temperature inside the dust collection chamber 20 does not change. going up. Rather, let some outside air flow in,
The I-no that slowly raised the temperature is the mostat 7.
7 does not operate too quickly and is effective in killing mites.

Furthermore, when a circulating airflow is occurring, the positive direction thermistor 78 changes its resistance value depending on the temperature of the circulating exhaust air. Therefore, the positive direction thermistor 78 outputs an electric signal according to the temperature to the control circuit 81, and the electric blower ti1269 input is controlled accordingly. That is, the higher the temperature of the live air, the higher the resistance value of the positive direction thermistor 78, and the lower the input to the electric blower 26. Conversely, the lower the humidity, the higher the input to the electric blower 11126.

Therefore, regardless of the outside temperature, the humidity of the circulating exhaust air reaches a certain level at a more or less constant pace. It is also possible to maintain

Note that if the positive direction thermistor 78 is provided in this way, an excessive rise in temperature can be prevented, so the thermostat 77
is no longer necessarily needed.

According to the above configuration, the opening/closing plate 6 supported by the lid body 14
By simply operating 8, it is possible to switch between the cleaning state and the disinfecting state. 71, there are no flexible parts for switching, so it is easy to use and there is no risk of losing this part.

In addition, the structure of No. 1 is such that the flow port 67 is closed with another opening/closing body 68 rather than the flow port 67 is closed with a boce.
This is advantageous in terms of maintaining airtightness.

In the above embodiment, the exhaust circulation air passage 6 is connected to the connection port 55.
A communication port 67 is formed in the opening/closing plate 68, which is a part of the inner lid member 53.
It is also conceivable to provide it at a position other than the connection port 55. However, it is better to install it near this connection port 55! Dust chamber 20
This is preferable because it will cause the wind to sway throughout the body.

Next, another embodiment of the present invention will be described based on FIG. 4.

In this embodiment, a mounting opening 106 is formed at the top of one side opposite to the recess 58 of the connection port 55 of the lid body 14, and the mounting opening 106 is located below the - side of the mounting opening 106 so that the top surface thereof is A support protrusion 107 parallel to the first plane of the outer lid member 51 is formed on the inner lid member 53. and,
Between the upper surface of these support protrusions 107 and the upper surface of the outer lid member 51, a connection port cover integral 108 serving as a connection port opening/closing means that also serves as an air path m means is installed horizontally in one direction. It is supported so that it can be freely moved and protruded into the connection port 55 from the mounting opening 106. In other words, this cover 108
is for opening and closing the upper part of the connection port 55. The integrated cover 108 has a hollow box shape, and the closed side surface on the side of the connection port 55 forms the exhaust circulation air passage 6.
This is an air passage closing portion 109 that closes off the mounting opening 106 that forms a part of the mounting opening 106 . Further, the integral cover 108 has an inflow opening 110 facing the initial circulation air passage 66 formed on the opposite side surface, and an outflow opening 111 that overlaps with the connection port 55 on the lower surface. The inside that communicates these inflow openings 110 and outflow openings 111 is a communication portion 112 . Furthermore, the cover unit 1
A connection port 5 is provided at the end of the upper surface of 0B on the air passage blocking portion 109 side.
A knob 113 is formed that protrudes outward from 5.

Then, when cleaning, as shown in FIG. 4, the connection port cover integral 108 is moved to the side of the loss circulation air passage 66, and the connection port 55 is left open. At this time, one cover
A part of the installation opening 106 of the exhaust circulation air path 66 is blocked by the air path blocking portion 109 of 08, and the electric blower 26 is closed.
The exhaust side and collection! The first room 20 is cut off.

On the other hand, when not in use, that is, when storing, pinch the knob 113 and slide the cover 108 toward the connection port 55.
(The upper part of the connection port 55 is closed. At this time, the cover unit 10
The air passage blocking portion 109 of No. 8 is fitted into the recess 58 of the connection port 55, and the contact plate 601. : The facing through hole 59 is also closed. Therefore, the dust in the dust collection chamber 20 does not leak to the outside through the connection port 55, and the appearance is good. Further, fine dust does not adhere to the contact plate 60, and reliability is improved.

In addition, when the upper part of the connection port 55 is closed by the cover unit 108 as described above, the entire outflow opening 111 of the J bar unit 108 is overlapped with the connection port 55, and the maximum area is
Inflow opening 110. The exhaust circulation air passage 66 and the connection port 55 communicate with each other through the communication portion 112 and the outflow opening 111, and the exhaust side of the electric blower 26 and the dust chamber 20 communicate with each other. Therefore, if the electric blower 26 is driven in this state, the exhaust air will be returned to the dust collection chamber 20. Moreover, connection port 5
Since the upper part of the dust collection chamber 5 is closed, more exhaust air is returned to the dust collection chamber 20.

Furthermore, by layering the cover 108, it is possible to continuously change the opening area of the upper part of the connection port 55 and the area of the overlapping portion of the connection port 55 and the outflow opening 1110 in conjunction with each other. The ratio of the fresh air flowing into the dust chamber 20 and the outside air can also be adjusted.

Further, according to the above configuration, the single integrated cover 108 serves as both the air passage opening/closing means and the connection port opening/closing means, resulting in an efficient configuration and good operability.

In addition, also in this actual ff1 example, the thermostat 77
Alternatively, a positive direction thermistor 78 may be provided.

〔Effect of the invention〕

According to the present invention, the following effects can be obtained.

In the vacuum cleaner according to claim 1, an exhaust circulation air passage communicating between the exhaust side of the electric blower and the dust collection chamber is formed inside the lid body that opens and closes a portion between the main body case and the dust collection chamber. It is possible to kill harmful microorganisms such as mites without deteriorating the hose due to heat, and since we installed an air passage opening/closing means to open and close the initial circulation air passage on 6 bodies, it can be opened and closed by the parts on the right. Compared to a structure in which the neck is removable, the operability is improved and there is no need to worry about losing the removable neck part.

Further, in the vacuum cleaner according to the second aspect, since the connection port opening/closing means for opening and closing the connection port for connecting the hose is also used as the air passage opening/closing means for opening and closing the exhaust circulation air passage, it is possible to have a structure with no waste. , it is not necessary to operate both opening and closing means separately, and operability is improved.

Furthermore, in the vacuum cleaner of claim 3, a temperature sensing element is provided in the air passage through which air passes, and this temperature sensing element is connected to a control circuit that variably controls the input of the electric blower. Regardless of the temperature, the humidity of the air can be reached at a constant level at a constant pace, and
It becomes possible to maintain this temperature at a constant value, making it possible to stabilize the operation when killing harmful microorganisms.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing one embodiment of the vacuum cleaner of the present invention, Fig. 2 is a cross sectional view near the connection port of the above, Fig. 3 is a circuit diagram of the same as the above, and Fig. 4 is another embodiment of the vacuum cleaner of the present invention. FIG. 3 is a cross-sectional view of the subsequent lot I showing an example. 12...Opening part, 13...Main case, 14...Lid body,
20... Collection 1! ``Chamber, 26...Electric blower, 55...Connection port, 66...Exhaust circulation air path, 68...Opening/closing plate as air path opening/closing means, 74...Exhaust air circulation path, 78...Temperature sensing element Positive direction thermistor as, 81...control circuit, 1
08...Connection port cover integrated as a connection port opening/closing means that also serves as an air passage opening/closing means, 109...Air passage closing part, 112...Communication part.

Claims (3)

[Claims] (1) An electric blower and a main body case with an internal dust collection chamber that communicates with the intake side of the electric blower and an opening facing the dust collection chamber, and a connection port to which a hose is detachably connected. and a lid body that freely opens and closes the opening of the main body case, and an exhaust circulation air that communicates the exhaust side of the electric blower and the connection port of the dust collection chamber inside the main body case and the lid body. A vacuum cleaner characterized in that an externally operable air passage opening/closing means for opening and closing a part of the exhaust circulation air passage is provided at a position near the connection port of the lid body. (2) A connection port opening/closing means is movably supported by the lid body and opens and closes the connection port, and the connection port opening/closing means includes an air passage closing part that blocks the exhaust circulation air passage when the connection port is opened, and A communication part is provided to open the exhaust circulation air passage when it is blocked and communicate the exhaust side of the electric blower with the dust collection chamber, so that the connection port opening/closing means and the air passage opening/closing means are integrated. The vacuum cleaner according to claim 1. (3) A control circuit that variably controls the input of the electric blower is provided, and a temperature sensing element whose output fluctuates depending on the temperature is provided in the air path through which the exhaust air passes through the vacuum cleaner body, and this temperature sensing element is connected to the control circuit. Claim 1 or 2 characterized in that it is connected to
The vacuum cleaner mentioned.