KR20100026279A - Nozzle for cleaner - Google Patents

Abstract

PURPOSE: A nozzle of a cleaner is provided to change easily water flowed to a reservoir into steam by maintaining atmospheric pressure of the reservoir in steam cleaning, and to prevent leakage of the water to the outside of the reservoir. CONSTITUTION: A nozzle of a cleaner comprises a nozzle main body, a reservoir(130), an outside flow path(172), and a shielding unit. The nozzle main body has a moving wheel. The outside flow path is formed on one side of the reservoir. The outside flow path is connecting the inside of the reservoir to the outside. The shielding unit selectively opens and closes the outside flow path.

Description

Nozzle for cleaner

This embodiment relates to a nozzle of a cleaner.

The present embodiment relates to a nozzle of a cleaner, and more particularly, to a nozzle of a cleaner which improves the structure of a steam generator provided in a nozzle of a cleaner to prevent leakage of water to the outside of the nozzle.

The vacuum cleaner is a device to reduce human labor by cleaning with the power of a machine.A vacuum cleaner using suction power and a water cleaner that inhales water and air at the same time by spraying water, as well as foreign matters on the floor by spraying steam recently Various kinds are disclosed, such as removing.

In addition, a vacuum steam cleaner capable of simultaneously inhaling foreign substances by a vacuum cleaner and steam cleaning by a water cleaner has also appeared.

On the other hand, the nozzle of the steam cleaner is provided with a steam generating device for generating steam therein, it is configured to remove the foreign material on the bottom surface by using the steam supplied with a mop attached to the lower side. In addition, a heater is provided inside the steam generator to convert water into steam at high temperature.

The steam generator, the heater is provided on one side of the water tank is applied to the tube heating method for generating steam by heating the entire water in the water tank and a small amount of water to the heater side is applied come.

However, in the case of the conventional steam generator according to the conventional heating method, since a large amount of water must be heated, the steam generation time is long, and the weight of the steam nozzle apparatus is heavy. In addition, the water tank is not easy to separate from the steam generating device has a problem that the possibility of contamination of the reservoir tank increases.

On the other hand, in the case of a conventional steam generating apparatus using a tube heating method, there is a problem in that water which is not changed into steam due to a small size and capacity of the heater is injected together. Accordingly, the steam generation efficiency is lowered, there was a problem that the stability of the product is not guaranteed.

And, in the case of the tube heating method, since a pump for sending water to the heater should be provided, there is a problem that it is expensive.

On the other hand, it is necessary to be provided with a heater of sufficient size (capacity) in order to easily generate steam, whether through the heating or tube heating system. However, there is a problem in that a large heater is disposed in a limited nozzle.

In addition, when the nozzle is inclined in one direction while the cleaning is performed, there is a problem that water that does not turn into steam is discharged to the outside of the nozzle. In addition, the flow path for steam is short, there is a problem that the water is discharged to the outside along with the steam.

In addition, when lifting the nozzle from the bottom surface to move the nozzle, there is a problem that the water present in the heating portion is discharged to the outside through the steam discharge portion.

The present embodiment aims to provide a cleaner nozzle which prevents water inside the reservoir from leaking out of the nozzle even when the nozzle is tilted or shaken in one direction during use of the cleaner nozzle.

In addition, it is an object of the present invention to provide a nozzle of a cleaner that can reduce the steam generation time by improving the structure of the steam generator.

In addition, it is an object of the present invention to simplify the structure of the steam generating device and to provide a nozzle of a cleaner which allows the weight of the entire nozzle provided with the steam generating device to be lighter.

In addition, an object of the present invention is to provide a nozzle of a cleaner that allows the water tank to be detachably provided from the steam generator so that the water tank can be cleaned when necessary.

The nozzle of the cleaner according to the present embodiment includes a nozzle body provided with a moving wheel; A reservoir provided in the nozzle body and storing water; An external air passage provided at one side of the reservoir and allowing the inside of the reservoir to communicate with outside air; And a shielding device connected to the external air flow path, and configured to selectively shield the external air flow path.

In another embodiment, a nozzle of a cleaner includes: a nozzle body forming an appearance; A reservoir provided in the nozzle body and storing water; An outdoor air passage connected to the reservoir; A shielding portion to selectively shield the outside air passage; And a moving wheel moved integrally with the shield.

According to the embodiment of the above configuration, by changing the pressure inside the reservoir according to the operation of the nozzle, there is an effect that it is possible to easily generate steam and to prevent the water inside the reservoir leak out.

In detail, when the moving wheel touches the ground and the steam cleaning is performed, the pressure inside the reservoir is maintained at atmospheric pressure, so that water introduced into the reservoir can be easily introduced into the heating unit and can be easily changed to steam.

On the other hand, when the moving wheel falls from the ground for the movement of the nozzle, the pressure inside the reservoir is formed as a vacuum pressure, so the pressure lower than the atmospheric pressure is maintained. There is an advantage.

In this embodiment, since a small amount of water is supplied from the reservoir to the heating unit provided with the heater, the steam generation time can be reduced.

In addition, since a heater having a sufficient capacity is provided on at least one side of the reservoir to generate heat, there is an advantage that the time for generating steam can be reduced.

In addition, since the structure of the steam generator can be simply implemented, there is an advantage that the weight of the entire nozzle provided with the steam generator can be lightened.

In addition, the water tank can be supplied to the water supply or cleaning, there is an advantage that can minimize the contamination inside the water tank.

Hereinafter, with reference to the drawings will be described a specific embodiment of the present invention. However, the spirit of the present invention is not limited to the embodiments presented, and those skilled in the art who understand the spirit of the present invention can easily suggest other embodiments within the scope of the same idea.

1 is a perspective view of a cleaner nozzle according to an embodiment of the present invention, Figure 2 is a perspective view of the cleaner nozzle showing a state in which the water tank according to the embodiment of the present invention is separated.

1 and 2, the nozzle 1 of the cleaner according to the embodiment of the present invention includes a nozzle main body 10 forming an outer appearance of the nozzle and an upper side of the nozzle main body 10 to provide the nozzle. A nozzle cover 20 for shielding the inside of the main body 10 and a connection portion 30 provided at one side of the nozzle main body 10 to allow the air sucked by the nozzle to move to the main body of the cleaner (not shown) are provided. Included.

Although not shown in the drawing, the nozzle 1 of the cleaner is connected to the main body of the cleaner by an extension tube and a connection hose. The connecting portion 30 allows the nozzle 1 to be connected to the extension pipe.

In addition, the nozzle body 10 is provided with a steam generator 100 to change the supplied water to steam.

The steam generator 100 includes a water tank 110 in which the supplied water is stored. The water tank 110 is detachably mounted. The user may separate the water tank 110 to refill after filling the water.

The main body 10 is provided with a tank seat 15 to allow the water tank 110 to be seated.

In addition, the main body 10 is provided with a detachable part 117 in which the water tank 110 is engaged in a state in which the water tank 110 is seated on the tank seating part 15. A plurality of detachable parts 117 may be provided. The detachable part 117 may be formed in the shape of a groove recessed downward.

Correspondingly, the water tank 110 is provided with a detachable protrusion 119 (see FIG. 3) provided to be coupled to the detachable portion 117. The detachable protrusion 119 is provided at a position corresponding to the detachable portion 117. The detachable protrusion 119 may be bent to have a "" shape.

On one side of the tank seating portion 15, a reservoir 130 into which the water of the water tank 110 flows is provided. The reservoir 130 has a reservoir opening 132 through which water is introduced.

The upper surface of the reservoir 130 may be formed at approximately the same height as the tank seating portion 15.

On the other hand, the lower portion of the main body 10 is provided with a first moving wheel 51 and a second moving wheel 52 to easily move the main body 10.

Hereinafter, the structure of the steam generator 100 will be described with reference to the drawings.

3 is a perspective view showing a steam generating device according to an embodiment of the present invention, Figure 4 is an exploded perspective view showing the configuration of the steam generating device of the present invention.

3 to 5, the steam generator 100 according to the embodiment of the present invention includes a water tank 110 in which water is stored and a water tank 110 provided below the water tank 110. Storage tank 130 selectively receives a predetermined amount of water from the 110, and the heating unit 150 is provided on one side of the reservoir 130 to heat the water introduced from the reservoir 130 to generate steam Included.

In detail, the water tank 110 may have a substantially rectangular parallelepiped shape. A storage space for storing water is formed in the water tank 110.

On one side of the water tank 110, a tank opening 112 is formed to open to allow the water stored in the water tank 110 to flow into the reservoir 130.

In addition, the bottom surface of the water tank 110 is formed to be inclined downward toward the tank opening 112. Therefore, the water stored in the water tank 110 can be easily moved to the tank opening 112.

The tank opening 112 is provided with a tank cap 120 to allow the tank opening 112 to be selectively shielded. The tank cap 120 is coupled to the water tank 110 and extends toward the inside of the reservoir 130.

In detail, the tank cap 120 has a valve member 122 to control the water supply from the water tank 110 to the reservoir 130, and a guide part 123 to guide the movement of the valve member 122. ) Is provided.

3 shows the state just before the water tank 110 is seated on the tank seat 15.

In addition, a lower side of the tank seat 15 is provided with a first leg 118 to support the water tank 110. A plurality of first legs 118 may be provided at corner portions of the tank seating portion 15.

In addition, the reservoir 130 has a substantially rectangular parallelepiped shape. The size of the reservoir 130, that is, the capacity for storing water is smaller than that of the water tank 110. Below the reservoir 130, a second leg 138 is provided to support the reservoir 130.

The reservoir 130 has a reservoir opening 132 through which water supplied from the water tank 110 flows. The reservoir opening 132 may be larger than the tank opening 112.

Since the reservoir opening 132 is formed larger than the tank opening 112, the tank cap 120 may be easily extended from the lower side of the tank opening 112 toward the inside of the reservoir 130.

Between the water tank 110 and the reservoir 130, a sealing member 114 is provided to prevent water from leaking from the reservoir 130. The sealing member 114 is disposed along the outer circumferential surface of the reservoir opening 132.

In addition, the reservoir 130 is provided with a pressing unit 135 for pressing the tank cap 120. The pressing unit 135 has a shape protruding upward from the lower surface of the reservoir 130.

When the tank cap 120 is seated on the upper side of the reservoir 130 in a state coupled to the water tank 110, the tank cap 120 is pressed by the pressing unit 135. In this process, the valve member 122 of the tank cap 120 is moved upward to open the tank opening 112.

In addition, the reservoir 130 is formed with an outside air inlet hole 137 through which external air is introduced. When air is introduced through the outside air inlet hole 137, atmospheric pressure may be maintained in the reservoir 130.

In the state where the pressure of the inside of the reservoir 130 is maintained at atmospheric pressure, the water of the water tank 110 flows into the reservoir 120. In this process, air inside the reservoir 120 may be introduced into the water tank 110.

At least one side of the reservoir 130 is provided with a heating unit 150 to heat the water introduced from the reservoir 130. In detail, the heating part 150 is disposed along one side and the other side of the reservoir 130.

Inside the heater 150, a heater 151 is provided to heat water to generate steam. The heater 151 may be disposed at the bottom of the heating unit 150. In this case, a sheath heater, a PTC heater, a ceramic heater, and the like may be applied to the heater 151.

Although not shown in the figure, a felt may be provided below the heater 151 to prevent heat of the heater 151 from being transferred to the surface of the heating part 150. That is, the felt may be referred to as a heat transfer preventing member.

The felt may be arranged to surround the heater 151.

In addition, a heater coupling part 154 to which the heater 151 is coupled is formed on one side of the heating part 150. One side of the heater 151 may be coupled to the heater coupler 154.

On the other hand, between the reservoir 130 and the heating unit 150, an inlet 136 is formed so that the water of the reservoir 130 flows into the heating unit 150. At least one inlet 136 may be formed at one side of the reservoir 130.

In order to allow water to easily flow from the reservoir 130 to the heating part 150, the inlet part 136 may be inclined downward toward the heating part 150.

5 is a cross-sectional view taken along the line II ′ of FIG. 1, FIG. 6 is a cross-sectional view taken along the line II-II ′ of FIG. 2, and FIG. 7 is a configuration of the steam generator according to the embodiment of the present invention. It is a front view showing.

5 to 7, the steam generator 100 according to the embodiment of the present invention includes a water tank 110 in which water supplied from the outside is stored, and a lower side of the water tank 110. A reservoir 130 for storing water introduced from the water tank 110, a tank cap 120 coupled to the water tank 110 and allowing the water of the water tank 110 to selectively fall; It is provided on at least one side of the reservoir 130 and includes a heating unit 150 to generate steam from the water introduced from the reservoir 130.

Here, the steam generator 100 may be mounted on the seating portion 11 of the nozzle body 10. The seating part 11 is provided with an air suction part 12 to suck air. In addition, one side of the air intake 12 may be formed with a suction passage 13 extending rearward.

Therefore, the air sucked through the air suction unit 12 may be moved to the connection unit 30 via the suction passage 13.

In detail, when the water tank 110 is completely coupled to the upper side of the reservoir 130, the tank cap 120 is pressurized by the pressing unit 135. In this process, the valve member 122 may be opened so that the water in the water tank 110 may fall into the reservoir 130. The water in the reservoir 130 flows into the heating part 150.

Hereinafter, a process and principle of introducing water into the heating unit 150 from the water tank 110 will be described.

Water in the water tank 110 may be introduced into the heating unit 150 via the reservoir 130 according to Pascal's principle.

Pascal's principle means that the pressure exerted on a fluid contained in a closed container is transmitted to all parts of the fluid and the wall of the container containing the fluid without being reduced in size.

The application of Pascal's principle to the present embodiment is as follows.

(1) P _tank + ρgh _{water _ tank} = P _air + ρgh _{water _ reservoir}

Equation (1) means that the pressure in the water tank 110 and the pressure in the reservoir 130 is in equilibrium. The pressure in the water tank 110 is the sum of the vacuum pressure of the tank and the pressure by the water stored in the tank, the pressure in the reservoir 130 is the pressure of the air inside the reservoir 130 and the reservoir ( 130 is the sum of the pressures stored by the water. As described above, the pressure of the air inside the reservoir 130 is maintained at atmospheric pressure.

When the tank cap 120 is opened, the water of the water tank 110 falls into the reservoir 130 by gravity, that is, water pressure. In this process, the air inside the reservoir 130 is introduced into the water tank 110 through the tank cap 120.

When water falls into the reservoir 130, the water level of the reservoir 130 is raised.

Subsequently, when the water level in the reservoir 130 rises and the water in the reservoir 130 covers at least a portion of the tank cap 120, the air in the reservoir 130 is transferred to the water tank 110. It cannot be introduced.

In this case, the water no longer falls from the water tank 110.

That is, when the water level of the reservoir 130 is raised to block the bottom opening of the tank cap 120, the air of the reservoir 130 may no longer flow into the water tank 110.

In this state, the water tank 110 is formed by the sum of the vacuum pressure and the water pressure by the water level, and the inside of the reservoir 130 is formed by the sum of the atmospheric pressure and the water pressure by the water level. That is, the pressure of the water tank 110 and the reservoir 130 is in equilibrium.

(2) P _air + ρgh _{water _ reservoir} = ρgh _{water _ boiling} + P _{steam & air}

Equation (2) means that the pressure in the reservoir 130 and the pressure in the heating unit 150 is the same. The pressure inside the heating unit 150 is the sum of the pressure caused by the water inside the heating unit 150 and the steam and air pressure inside the heating unit 150.

That is, when there is no water in the heating unit 150 or there is a small amount, water is diverted from the reservoir 130 by the water level difference between the reservoir 130 and the heating unit 150. ) Can be moved.

Therefore, the water level inside the heating unit 150 may be determined by the water level of the reservoir 130.

In summary, the water stored in the reservoir 130 is moved to the heater 150 until the water level in the reservoir 130 and the heater 150 is the same. That is, when the water level of the reservoir 130 and the heating unit 150 is the same, the water will not move any more.

By the above structure, the water of the water tank 110 can be easily moved to the heating unit 150. That is, there is no need for a separate configuration such as a pump or a controller, and there is an advantage in that water can be moved from the water tank to the heating unit 150 by a simple structure.

In addition, the water level of the reservoir 130 and the heating unit 150 is controlled by the principle of Pascal, and the low water level is secured in the heating unit 150, so there is an advantage that the rapid steam generation is possible.

The nozzle 1 may be moved in the front-rear direction of the nozzle by the moving wheels 51 and 52. At this time, the water in the water tank 110 and the reservoir 130 is also shaken in the front and rear direction. Here, the direction in which the air suction unit 12 is located is the front side direction, and the direction in which the connection unit 30 is located is the rear side direction.

On the other hand, the inlet 136 extends in the horizontal (left and right) direction from the reservoir 130 toward the heating unit 150. In this case, even if the nozzle 1 is shaken in the front-rear direction, water can be prevented from flowing back from the heating part 150 to the reservoir 130.

In addition, since the hot water in the heating unit 150 is prevented from flowing back to the reservoir 130, an excessive increase in temperature of the reservoir 130 and the water tank 110 may be prevented.

In summary, the inlet 136 extends in a direction intersecting with a direction in which the nozzle body proceeds, so that the water of the heating part 150 flows back into the reservoir 130 is reduced.

On the other hand, the heating unit 150 is disposed along the circumference of the reservoir 130. In detail, the heating unit 150 is disposed to surround one side and the rear surface of the reservoir 130.

The heating unit 150 may include a first heating unit 150a disposed adjacent to one side of the reservoir 130 and a second heating unit 150b disposed adjacent to the rear side of the reservoir 130. Included.

That is, each of the heating parts 150a and 150b may be arranged in a “┓” shape.

The heater 150 is provided with heaters 151 and 152 as a heating source of water. The first heater 151 is provided to the first heating part 150a, and the second heater 151 is provided to the second heating part 150b.

Accordingly, the plurality of heaters 151 and 152 may be disposed in a “┓” shape like the heating unit 150.

By providing a plurality of heaters 151 and 152 to the heating unit 150, sufficient heat can be provided, and thus there is an advantage that the steam can be generated quickly.

In addition, since the heating part 150 is bent and provided to the nozzle, there is an advantage in that a bulky heater is easily installed. That is, there is an advantage that it is easy to utilize the space for mounting the heating unit 150.

The heaters 151 and 152 may be configured separately, or may be integrally formed. That is, the heaters 151 and 152 may be formed to be bent in a "┓" shape along the heating part 150.

In addition, the heating unit 150 is provided with a steam discharge unit 155 to discharge the generated steam. The steam discharge part 155 may be provided to the second heating part 150b.

The steam discharge part 155 has a pipe shape, a part of which extends into the heating part 150, and the other part of the steam discharge part 155 protrudes out of the heating part 150.

That is, the steam discharge part 155 is disposed to be fitted to one surface of the heating part 150.

In addition, the steam discharge part 155 is disposed to be located above the heating part 150. In detail, the steam outlet 155 may be disposed at a position higher than the height of the center portion of the heating unit 150. This is because steam generated by the heater 151 is lighter than water and has a property of rising.

Although not shown in the figure, a plurality of the steam outlets 155 may be provided.

Briefly explain the process of steam generation.

Water introduced from the reservoir 130 is located from the first heating unit 150a to the second heating unit 150b. In order to prevent water from flowing into any one of the heating units, the bottoms of the heating units 150a and 150b may have the same height.

The water is changed into steam while being heated by the heaters 151 and 152, and the generated steam may be discharged to the outside through the steam outlet 155.

On the other hand, one side of the reservoir 130, there is provided an outdoor air communication unit 174 in communication with the outside air. The outside air communication unit 174 is formed at a position corresponding to the outside air inlet hole 137, and the air of the outside air communication unit 174 is introduced into the reservoir 130 through the outside air inlet hole 137. Can be.

The outside air passage 172 extends in the outside air communication unit 174. The outside air passage 172 extends from one side of the outside air communication unit 174 in the direction of the first moving wheel 51.

Outside air may be introduced into the outside air communication unit 174 through the outside air flow passage 172, and may be introduced into the reservoir 130 through the outside air inlet hole 137. Thus, the reservoir 130 may be maintained at atmospheric pressure.

As described above, the reservoir 130 receives water from the water tank 110 in a state where atmospheric pressure is maintained. In addition, the water of the reservoir 130 may be introduced into the heating unit 150.

In addition, a shielding device 160 is provided at one side of the external air passage 172 to selectively shield the external air passage 172.

In addition, a spring 180 is provided between the shielding device 160 and the first moving wheel 51 to contract and restore the vertical movement of the moving wheel 51.

Meanwhile, although only the state in which the outside air passage 172 extends in the direction of the first moving wheel 51 is illustrated, the outside air passage 172 may extend in the direction of the second moving wheel 52. It may be configured to extend in the direction of the first moving wheel 51 and the second moving wheel 52, respectively.

For convenience of explanation, the case where the outside air passage 172 extends to the first moving wheel 51 will be described.

Hereinafter, the structure and operation of the shielding device 160 will be described.

8 is a cross-sectional view showing a moving wheel is spaced apart from the ground according to an embodiment of the present invention, Figure 9 is a cross-sectional view showing a moving wheel is supported on the ground according to an embodiment of the present invention.

8 and 9, the shielding device 160 according to the embodiment of the present invention includes a body portion 161 forming an internal space having a predetermined size, and formed in the body portion 161 and inflowing outside air. A communication hole 161a for enabling the shielding, a shielding portion 162 for selectively shielding the communication hole 161, and a movement coupled with the shielding portion 162 and guiding movement of the shielding portion 162. Guide 163 is included.

Further, below the shielding device 160, the first moving wheel 51 is provided. In addition, a wheel cover 55 is provided on the upper side of the first moving wheel 51 to shield the upper surface of the moving wheel 51.

The first moving wheel 51 is rotatably coupled to the wheel cover 55. Here, the wheel cover 55 is provided with a wheel shaft 58 that forms the center of rotation of the first moving wheel 51.

In detail, the movement guide 163 is inserted into the communication hole 161a so as to be movable. In addition, the shield 162 is provided on an outer circumferential surface of the movement guide 163.

The shield 162 may shield the upper side of the communication hole 161a.

The movement guide 163 may be coupled to the shield 162 by an interference fit method, or may be coupled by a method such as adhesion. In addition, the movement guide 163 and the shield 162 may be integrally formed.

On the other hand, the shielding portion 163 may be formed larger than the size of the soft earth hole (161a) to enable the closing of the communication hole (161a).

One side of the movement guide 163 is fixed to the wheel cover 55. Since the first moving wheel 51 is rotatably coupled to the wheel cover 55, when the first moving wheel 51 is moved in the up and down direction, the wheel cover 55 and the movement guide 163 are rotated. The first moving wheel 51 may be integrally moved.

Between the shielding device 160 and the wheel cover 55, a spring 180 is provided to enable elastic movement of the first moving wheel 51. A compression spring may be applied to the spring 180.

In addition, the spring 180 may be fixed to a spring fixing part 182 provided on the body 161 and the wheel cover 55.

The operation of the first moving wheel 51 and the shielding device 160 will be described.

8 illustrates a case in which the first moving wheel 51 is spaced apart from the ground 80. When the first moving wheel 51 is spaced apart from the ground 80, it may occur when the nozzle is lifted from the ground and moved or when the nozzle is tilted.

When the first moving wheel 51 is spaced apart from the ground 80, the first moving wheel 51 is moved downward by its own weight.

The movement guide 163 and the shielding portion 162 are moved downwardly integrally with the first moving wheel 51, and the shielding portion 162 shields the upper side of the communication hole 161a.

In this process, the spring 180 is stretched.

Then, the outside air cannot be introduced into the shielding device 160 through the communication hole 161a. As a result, since the outside air flow path 172 is shielded, the outside air cannot be moved to the outside air communication unit 174 through the outside air flow path 172.

Therefore, since the outdoor air cannot flow into the reservoir 130 connected to the external air communication unit 174, the reservoir 130 has a vacuum pressure. In addition to the reservoir 130, a vacuum pressure is formed in the outside air communication unit 174, the outside air flow path 172, and the shielding device 160.

Here, the vacuum pressure is formed to be lower than the external atmospheric pressure, the pressure is applied to the nozzle toward the inner direction from the outside of the nozzle.

In addition, since the reservoir 130 and the outdoor air passage 172 are blocked from the outside, the water of the reservoir 130 may be prevented from being discharged to the outside.

In this case, even if the nozzle is shaken or tilted, the water inside the reservoir 130 may not easily leak out of the nozzle. This is because there is a pressure difference inside and outside the nozzle, so that water is not easy to move toward the outside of the nozzle.

9 illustrates a case in which the first moving wheel 51 is supported on the ground 80.

In this case, the distance between the lower surface of the shielding device 160 and the upper surface of the wheel cover 55 is narrowed by the load of the nozzle. In this process, the spring 180 is compressed, and the shield 162 is spaced apart from the communication hole 161a.

That is, the communication hole 161 may be opened, and outside air may be introduced into the shielding device 160 through the communication hole 161 (flow a).

In addition, the air introduced into the shielding device 160 is moved to the outside air passage 172 through the connection hole 172a.

Air passing through the outdoor air passage 172 is introduced into the reservoir 130 through the external air communication unit 174. Therefore, the pressure inside the reservoir 130 may be formed at atmospheric pressure.

As described above, in the state where the inside of the reservoir 130 is maintained at atmospheric pressure, the water in the water tank 110 flows into the reservoir 130 and then moves to the heating unit 150 to change into steam. Can be.

By the above configuration, when the nozzle of the cleaner is normally operated, that is, when the first moving wheel 51 is supported on the ground, outside air flows into the reservoir 130 and the pressure inside the reservoir 130 is increased. This is maintained at atmospheric pressure.

In a state where the pressure inside the reservoir 130 is at atmospheric pressure, water in the water tank 110 flows into the reservoir 130 and moves to the heating part 150.

On the other hand, when the nozzle is lifted or tilted so that the first moving wheel 51 is spaced apart from the ground, the shield 162 is moved downward by the weight of the first moving wheel 51 and the The communication hole 161a is shielded.

As a result, the outside air flow path 172, the outside air communication unit 174, and the reservoir 130 are blocked from the outside to form a vacuum pressure. The vacuum pressure is smaller in size than the atmospheric pressure, and since the reservoir 130 and the outdoor air passage 172 are shielded from the outside, water inside the reservoir 130 may be prevented from leaking to the outside.

1 is a perspective view of a cleaner nozzle according to an embodiment of the present invention.

Figure 2 is a perspective view of a cleaner nozzle showing a state in which the water tank is separated according to an embodiment of the present invention.

3 is a perspective view showing a steam generating device according to an embodiment of the present invention.

Figure 4 is an exploded perspective view showing the configuration of the steam generator of the present invention.

5 is a cross-sectional view taken along the line II ′ of FIG. 1.

6 is a cross-sectional view taken along the line II-II 'of FIG. 2;

7 is a front view showing the configuration of a steam generator according to an embodiment of the present invention.

8 is a cross-sectional view showing a moving wheel spaced apart from the ground according to an embodiment of the present invention.

9 is a cross-sectional view showing a state that the moving wheel is supported on the ground according to an embodiment of the present invention.

Claims (12)

A nozzle body provided with a moving wheel; A reservoir provided in the nozzle body and storing water; An external air passage provided at one side of the reservoir and allowing the inside of the reservoir to communicate with outside air; And And a shielding device connected to the outside air passage and selectively shielding the outside air passage. The method of claim 1, In the shielding device, A body part having a communication hole through which outside air is introduced; The cleaner nozzle including a shield for selectively shielding the communication hole. The method of claim 2, In the shielding device, Nozzle of the cleaner further comprises a movement guide for guiding the movement of the shield. The method of claim 1, And the shielding device is interposed between the outside air passage and the moving wheel. The method of claim 1, In the shielding device, The nozzle of the cleaner further comprises a spring to enable the elastic movement of the shielding device. The method of claim 1, The nozzle of the cleaner further provided between the water tank and the external air flow path is an external air communication unit for moving the outside air. The method of claim 6, The reservoir is formed with an outside air inlet hole to allow outside air to flow in, The nozzle of the vacuum cleaner is provided at a position corresponding to the outside air inlet hole. A nozzle body forming an appearance; A reservoir provided in the nozzle body and storing water; An outdoor air passage connected to the reservoir; A shielding portion to selectively shield the outside air passage; And The nozzle of the cleaner including a moving wheel which is moved integrally with the shield. The method of claim 8, The nozzle of the cleaner coupled to one side of the moving wheel, further comprising a guide for guiding the movement of the shield. The method of claim 8, The nozzle of the cleaner further comprises a spring elastically deformed according to the movement of the moving wheel. The method of claim 8, The nozzle of the cleaner, characterized in that the external air flow path communicates with the outside in the state that the moving wheel is supported on the ground. The method of claim 8, And the outside air passage is shielded while the moving wheel is spaced apart from the ground.

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