JP2022524894A - Ventilation duct cleaning device and ventilation duct cleaning method - Google Patents

Abstract

The present invention relates to a ventilation duct cleaning device and a ventilation duct cleaning method, and the ventilation duct cleaning device according to the embodiment of the present invention has a negative pressure generating device for generating negative pressure and a negative pressure generating device directly and indirectly on one side of the ventilation duct. It includes a first connecting part to be connected, a second connecting part to receive the generated negative pressure, and an accommodating part forming a passage between the first connecting part and the second connecting part, and the generated negative pressure of the ventilation duct. It can include a collecting member that collects the cleaning member supplied from the other side to the inside through the accommodating portion.

Description

The present invention relates to a ventilation duct cleaning device and a ventilation duct cleaning method, and more specifically, the inside of the ventilation duct can be easily cleaned to remove a pollution source in the ventilation duct installed in a building, for example. It relates to a ventilation duct cleaning device and a ventilation duct cleaning method.

The ventilation function of indoor air was generally provided only to large buildings such as office spaces or factories. However, recently, newly built residential buildings often provide a ventilation function for controlling the degree of indoor air pollution in addition to a temperature control function such as cooling or heating. The temperature of the indoor air can be adjusted using an air conditioner or the like. However, if indoor activity becomes active, the degree of indoor air pollution will increase, and the increased degree of indoor pollution can be reduced to some extent by using an air cleaner, but is the purification work by the air cleaner inefficient? Since the concentration of contaminants that cannot be removed by the cleaner may increase, a ventilation process is required to periodically supply fresh outdoor air into the room and expel the contaminated indoor air to the outside. Recently, the need for ventilation of indoor air has become an issue for reasons such as cooking combustion gas, sick building syndrome, or old house syndrome.

In order to realize such a ventilation function in a residential space, it is possible to use a method of connecting the indoor and outdoor areas with a ventilation duct to exchange air. Unlike the ventilation ducts used in large office buildings or factories, the residential space has a low floor height and the installation space for the ventilation ducts is narrow or complicated, and it is not a normal ventilation duct, but has a small diameter and is easy to arrange. Flexible ventilation ducts are often used. If a ventilation duct is installed in such a residential space and used for a long period of time, the internal contamination of the duct will increase. Therefore, ventilation using a contaminated ventilation duct cannot satisfy the user's desire to obtain clean outdoor air, or rather results in the supply of more contaminated air into the room. Therefore, in order to achieve the purpose of the ventilation function, the cleaning condition or sanitary condition of the ventilation duct must be guaranteed, so it is preferable to remove the pollutants inside the ventilation duct regularly.

However, in reality, there is no effective way to clean the inside of the ventilation duct. Unlike ventilation ducts in large buildings or factories that can be cleaned manually or by robots, household ventilation ducts have a structure in which the ventilation ducts are branched, or the size of the ventilation ducts is small and the placement route is complicated, so it is realistic. The problem is that there is no effective way to clean the ventilation ducts of residential buildings, even though the ventilation ducts need to be cleaned and there is a shared awareness of the need.

Of course, in the past, a method of introducing a cleaning ball into the ventilation duct to blow air has been introduced, but the cleaning ball moving inside the ventilation duct is a dust layer or sludge adsorbed on the ventilation duct. Such substances cannot be effectively removed.

Since a considerable amount of contaminants still remain inside the ventilation duct even after cleaning with a cleaning ball, there is a problem that it is not suitable as a method for cleaning the ventilation duct of a residential building as a living space with a long residence time. ..

An embodiment of the present invention provides a ventilation duct cleaning device and a ventilation duct cleaning method capable of easily cleaning the inside of a ventilation duct in order to remove a pollution source in a ventilation duct installed in a building, for example. Has its purpose.

In order to solve the above problems, the present invention presents a negative pressure generating device that generates negative pressure, a first connecting portion that is connected to a ventilation duct, and a second connecting portion that receives negative pressure generated by the negative pressure generating device. , And an accommodating portion forming a negative pressure transmission path between the first connecting portion and the second connecting portion, and water and water sucked into the inside by the generated negative pressure on the other side of the ventilation duct. It is possible to provide a ventilation duct cleaning device including a collection member that collects the cleaning member that is charged after the suction of the above through the accommodating portion.

Further, the negative pressure generator can directly provide the negative pressure to the second connecting portion or indirectly provide the negative pressure to the second connecting portion via the enclosed space.

Then, the recovery member is housed, and the main body portion that forms the closed space is further included, and the one-side opening port of the second connecting portion is exposed to the closed space and can receive the negative pressure.

Here, the main body portion includes a mounting portion on which the negative pressure generating device is mounted, and further includes a rubber packing provided along the outer edge of the mounting portion, and the negative pressure generating device is mounted on the mounting portion. The enclosed space can be formed when it is done.

In this case, in the main body portion, the height of the region where the negative pressure generator is mounted is lower than the height of the region where the accommodating member is accommodated, and the side cross section can be formed in an'L'shape.
Further, the cleaning member may be an atypical woven fabric.

Then, the length of the cleaning area, which is the area occupied inside the ventilation duct while passing through the ventilation duct, is 1.4 times or more and 3.7 times or less the inner diameter of the ventilation duct. The area or volume can be determined.

Here, when the diameter of the ventilation duct is 80 mm or less and the length is 50 meters or less, the amount of water injected into the ventilation duct at one time can be 5 liters or less.

In this case, the ventilation duct is made of a resin material, the outer surface of the ventilation duct has a corrugation structure in which ridges and valleys are repeated, but the inner surface has a flat structure, and the negative pressure generator is inside the ventilation duct. Negative pressure can be provided such that the degree of vacuum is from 1500 mm of water column (mmH ₂ O) to 7000 mm of water column (mmH ₂ O).

Further, the operation of the negative pressure generator can be stopped within a predetermined time from after the suction of the washing water to before the suction of the cleaning member.

Then, the negative pressure generator is connected so as to directly supply the negative pressure to the second connecting portion, and the first connecting portion or the second connecting portion is a flow path to the connecting portion with the accommodating portion. Can include an open / close switch that opens and closes.

Further, in order to solve the above-mentioned problems, the present invention is a method of cleaning a ventilation duct using the above-mentioned ventilation duct cleaning device, in which a negative pressure is generated at one end of the ventilation duct by the negative pressure generator. In the state, a state in which a negative pressure is generated at one end of the ventilation duct by the negative pressure generator after the cleaning water supply stage in which the cleaning water is sucked and supplied to the other end of the ventilation duct and the cleaning water supply stage. Then, after the cleaning member supply step of sucking and supplying an atypical textile-type cleaning member to the other end of the ventilation duct and the cleaning member supply step, the negative pressure generator applies negative pressure at one end of the ventilation duct. In the state of being generated, the cleaning water and the cleaning member collected in the cleaning water supply stage and the cleaning member supply stage are collected in the collection member constituting the ventilation duct cleaning device. Ventilation duct cleaning methods including the above can be provided.

In this case, when the diameter of the ventilation duct is 80 mm or less and the length is 50 meters or less at the washing water supply stage, the amount of water injected into the ventilation duct at one time can be 5 liters or less. ..

Further, when the ventilation duct is made of a resin material and the outer surface of the ventilation duct has a corrugation structure in which ridges and valleys are repeated, but the inner surface has a flat structure, the cleaning water supply stage, the cleaning member supply stage, and the above. At the cleaning water and cleaning member recovery stage, the negative pressure generator provides negative pressure so that the degree of vacuum inside the ventilation duct is 1500 mmH ₂ O to 7000 mmH ₂ O. be able to.

The length of the cleaning area, which is the area occupied inside the ventilation duct while the cleaning member passes through the ventilation duct at the stage of supplying the cleaning member, is 1.4 times or more and 3.7 times or less the inner diameter of the ventilation duct. The area or volume of the cleaning member can be determined.

Here, the operation of the negative pressure generator can be interrupted within a predetermined time between the cleaning water supply stage and the cleaning member supply stage.

In this case, after the cleaning water and cleaning member recovery step, the ventilation duct drying step of operating the negative pressure generator to dry the inside of the ventilation duct for which cleaning has been completed can be further included.

According to the embodiment of the present invention, not only the cleaning operation for removing the pollution source of the ventilation duct will be easy, but also the removal efficiency of the pollution source will be considerably improved.

The figure for demonstrating the ventilation duct structure according to the Example of this invention. The perspective view of the ventilation duct cleaning apparatus according to the Example of this invention. The figure which shows the recovery member which comprises the ventilation duct cleaning apparatus of FIG. It is a figure which shows the main body part in the state which the negative pressure generator which constitutes the ventilation duct cleaning device of FIG. 2 is removed. The figure which shows the negative pressure generator separated from the main body part of the ventilation duct cleaning device of FIG. It is an exemplary diagram of the guide portion 230'that constitutes the ventilation duct cleaning device of FIG. 2. It is a flowchart of the ventilation duct cleaning method according to the Example of this invention. It is a flowchart of the ventilation duct cleaning process by another Example of this invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the examples described here, and can be embodied in other embodiments. Rather, the examples presented here are provided so that the disclosure content can be thorough and complete, and to fully convey the idea of the invention to those skilled in the art. The same reference numerals indicate the same components throughout the specification.

FIG. 1 is a diagram for explaining a ventilation duct structure according to an embodiment of the present invention.

As shown in FIG. 1, the ventilation system 90 according to the embodiment of the present invention includes a ventilation device 100 and a ventilation duct 130.

As shown in FIG. 1, a ventilation device 100 is provided on the ceiling of the air conditioning chamber as. The ventilation duct 130 is connected to one side of the ventilation device 100, more accurately to the connecting portion 110, and the outdoor diffusers 121 and 122 are connected to the other side. Here, the outdoor diffusers 121 and 122 are divided into an air supply outdoor diffuser 121 and an exhaust outdoor diffuser 122 so that the outdoor air is supplied to the indoor living space and the indoor air is exhausted to the outside. Become.

The ventilation duct 130 includes an air supply ventilation duct 131 and an exhaust ventilation duct 132. As shown in FIG. 1, the ventilation duct 130 is divided into a plurality of partitions by a wall or the like, for example, in a living space up to an air-conditioned room as such as a veranda and each partition space (for example, a living room, a back room, a toilet, etc.) It is assumed that a ventilation duct 130 connected at a ratio of 1: 1 is formed.

Further, the other side of the ventilation duct 130 is provided on the ceiling of each partition space in the room, supplies the outdoor air provided by the ventilation device 100 to the room, sucks the indoor air and sucks the indoor air to the outside through the ventilation device 100. It is connected to the indoor diffusers 141 and 142 that exhaust to the air. Here, the outdoor diffusers 141 and 142 can also include the air supply indoor diffuser 141 and the exhaust indoor diffuser 142. Of course, it is possible to perform air supply and exhaust at the same time with a single diffuser, but since it is out of the scope of the embodiment of the present invention, further description will be omitted.

The ventilation duct 130 according to the embodiment of the present invention can use various types of pipes, that is, ducts, but is made of a non-toxic PVC material that is resistant to chemicals, and a soft hose or the like is used for ease of construction. can do. Further, the outer peripheral surface of the ventilation duct 130 has a corrugation structure or a bellows tube structure in which ridges and valleys are repeated to prevent breakage, and the inner surface has a substantially flat structure or fine structure to improve cleanability. It is preferable to apply a structure in which ridges and valleys are present but the size of the ridges and valleys is smaller than that of the outer surface.

As an example of the ventilation duct of the present invention, a pipe having an inner diameter of 50 mm to 160 mm can be applied. If the inner diameter of the ventilation duct is 50 mm or less, it will be easily closed when cleaning with an atypical woven cleaning member, and if the inner diameter of the ventilation duct is 160 mm or more, it will have sufficient output and be movable. It was confirmed that it was difficult to construct a negative pressure generator and there was a problem that the piping made of resin material was easily narrowed.

For example, when constructing a building having a structure as shown in FIG. 1, the ventilation device 100 and a large number of ventilation ducts 130 connected to the ventilation device 100 are attached along the ceiling of the building, and thus each living room or toilet. In each partition space such as, it seems that substantially only the indoor diffusers 141 and 142 are exposed.

Further, the ventilation device shown in FIG. 1 has been described by taking as an example a ventilation device of a living space such as an apartment. However, in the ventilation device of the present invention, the ventilation device is provided in the air conditioning room, the air conditioning space is divided, and ventilation is performed. If the ventilation duct connecting the device and the air-conditioned space is connected 1: 1 it can be applied to various applications such as hospitals, schools, public offices or offices in addition to living spaces.

Therefore, the amount of air conditioning can be determined by the size of each divided space, thereby determining the diameter of the ventilation duct, and the output of the negative pressure generator of the present invention by the diameter and length of the ventilation duct. It is preferable to determine.
The ventilation duct 130 connecting each indoor space and the air-conditioning room as can have a washable structure described later by being connected to the ventilation device 100 at a ratio of 1: 1.

In reality, such a form is applied not only to a residential space but also to various architectural spaces such as a commercial space. Under such an assumption, the ventilation duct cleaning according to the embodiment of the present invention is described below. The device and ventilation cleaning method will be described in detail.

2 is a perspective view of the ventilation duct cleaning device according to the embodiment of the present invention, FIG. 3 is a diagram showing a recovery member constituting the ventilation duct cleaning device of FIG. 2, and FIG. 4 is a diagram showing a ventilation duct cleaning device of FIG. FIG. 5 is a diagram showing a main body portion in a state where the constituent negative pressure generator is removed, and FIG. 5 is a diagram showing a negative pressure generator separated from the main body portion of the ventilation duct cleaning device of FIG.

As shown in FIGS. 2 to 5, the ventilation duct cleaning device 300 according to the embodiment of the present invention includes a negative pressure generating device 210 and a recovery member 220, and may further include an external frame, that is, a main body portion 200 indicating a housing. can.

Since the main body 200 is a housing that forms an outer edge, it can be formed into various forms using various materials. FIG. 2 shows a portion in which the negative pressure generator 210 is mounted or connected and a portion in which the recovery member 220 is housed are formed so as to have different heights, that is, steps. Then, it will not be particularly limited to the form.

The main body 200 includes a hinged door type opening / closing door for easily accommodating and carrying in the recovery member 220 housed in the storage section, and is a connecting member for connecting the recovery member 220 and the ventilation duct 130 of FIG. 1 to each other. Can be included. The connecting member can include the hose 205 and the guide portion 230 according to the embodiment of the present invention.

The hose 205 can be formed of a resin material, and the guide portion 230 can be formed of an iron (Fe) or SUS material. Further, as shown in FIG. 3, the guide portion 230 is connected to the first connecting portion 230a connected between the hose 205 and the first opening 221 of the collecting member 220 and the second opening 223 of the collecting member 220. It can include a second connecting portion 230b that is connected.

The second connecting portion 230b connected to the second opening 223 is communicated with the internal space of the recovery member 220, and the negative pressure generated by the negative pressure generator 210 via the second connecting portion 230b is inside the recovery member 220. It is transmitted to the space, and water and the cleaning member can be recovered by negative pressure at the first connecting portion 230a.

Even if the second opening 223 of the recovery member 220 is maintained in an open state, there is no problem in transmitting negative pressure, but the second connecting portion 230b is supported by the bottom surface of the housing of the main body portion 200. Can be extended to. Therefore, there is an effect of preventing the vibration of the main body 200 or the recovery member 220 in the main body due to the vibration generated by the negative pressure generator 210.

The main body is configured so that the lateral cross-sectional shape is'L'shaped so that the difference in overall height is minimized when accommodating the recovery member 220 and mounting the negative pressure generator 210. be able to.

As shown in FIG. 4, the negative pressure generator 210 is mounted on the mounting portion (or seating portion) 201 formed on one side of the main body portion 200. A rubber packing 203 can be provided outside the mounting portion 201. When the opening / closing door of the main body 200 is closed after the negative pressure generator 210 is mounted on the mounting section 201, the inside of the main body 200 is maintained in a sealed state.

As described above, if the closed state is maintained, the negative pressure generated by the negative pressure generator 210 can be easily transmitted to the ventilation duct 130 via the hose 205. In other words, as shown in FIG. 3, it can be confirmed that one side of the recovery member 220 is connected to the hose 205 via the guide portion 230 and the other side is exposed to the outside of the closed space. Therefore, for example, the negative pressure flowing into the other side can be transmitted to the hose 205 and the ventilation duct 130 through the internal space of the recovery member 220.

Therefore, due to the negative pressure generated by the negative pressure generator 210, the water (for example, several liters) and the cleaning member (for example, towel) supplied from the other side of the ventilation duct 130 can be easily recovered by the recovery member 220. Can be done.

The negative pressure generator 210 according to the embodiment of the present invention includes a negative pressure, that is, a vacuum pump 211 that generates negative air pressure or negative pressure, and may further include a control unit for controlling the vacuum pump 211. can. As shown in FIG. 4, the vacuum pump 211 can operate by receiving an external commercial power source. Of course, it could also be powered by an internal battery. The control unit can control the vacuum pump 211 on and off or perform an operation for adjusting the size of the negative pressure. The control unit receives a user command through an interface with the user and controls the vacuum pump 211.

The negative pressure generator 210 has an output of 9,000 W or less when the length of the ventilation duct is 50 m (m) or less and the diameter is 50 mm (mm) to 160 mm (mm). It is preferable to provide negative pressure so that the internal vacuum degree is from 1,500 mmH ₂ O to 7,000 mmH ₂ O.

If the degree of vacuum inside the ventilation duct is experimentally smaller than 1,500 water column millimeters (mmH ₂ O), there is a problem that the textile type cleaning member cannot be recovered or the inside of the ventilation duct is blocked by the cleaning member or the cleaning member. It was confirmed that sufficient collision energy or kinetic energy for cleaning the inside of the ventilation duct could not be secured in the process of being transferred by negative pressure, and the cleaning process by the cleaning member had to be repeated many times.

Further, it could be expected that the larger the degree of vacuum in the ventilation duct, the better the cleaning performance and the easier it is to recover the cleaning member, but the degree of vacuum inside the ventilation duct is 7,000 mmH ₂ O. In the above cases, there is a problem that the water introduced before the cleaning member for cleaning cannot sufficiently wet the inside of the ventilation duct and is collected, or the ventilation duct is narrowed and the flow path is blocked. It was confirmed.

The negative pressure generator 210 used in the test process of the present invention includes, for example, a vacuum motor operating at 3600 W / 4.8 HP (where HP is horsepower) as a pump, and the pump can operate at 220 V / 60 Hz. It was possible to operate so that the degree of vacuum was 2700 mmH ₂ O.

Of course, the negative pressure generator 210 operates continuously, but can be driven so that the washing water, for example, water is added two or three times and the cleaning member is added two or three times repeatedly.

The negative pressure generator 210 can also be used during the drying operation for the drying operation in the ventilation duct 130 after the cleaning process is completed.

The recovery member 220 according to the embodiment of the present invention can be connected to the ventilation duct 130 via the guide portion 230 and the hose 205 having the one-side opening port more accurately connected to the first connecting portion 230a, and is a recovery member. The second connecting portion 230b connected to the other side opening port of 220 or the other side opening port can be connected to the vacuum pump 211 or placed in an open state in the internal closed space of the main body portion 200.

As a result, the negative pressure provided to the other side of the recovery member 220 is transmitted to the guide portion 230, the hose 205, and the ventilation duct 130, and the provided negative pressure sucks or sucks water and the cleaning member. The ventilation duct cleaning device 300 according to the embodiment of the present invention is considered to have a structure for efficiently recovering water and cleaning members by transmitting the negative pressure generated by the vacuum pump 211 to the ventilation duct 130.

Specifically, for the initial input amount of washing water, for example, water, 5 liters or less can be used when using a duct having a diameter of 80 mm or less, and when the diameter is 160 mm, 10 liters or less of water can be washed once. It was confirmed by a repetitive cleaning test that it is preferable to put it in the initial stage at the time of. It was confirmed that there is no big difference in the cleaning effect even if a larger amount of water is added at one time.

Then, it was confirmed that the length of the ventilation duct is preferably 50 meters (m) or less in order to prevent the ventilation duct from being blocked and to effectively clean the ventilation duct.

Since the amount of wash water input can be variously determined depending on the length and diameter of the pipe, the embodiment of the present invention is not particularly limited to one embodiment. However, it is possible to add the washing water about 2 to 3 times based on the initial charging amount, and to repeatedly add the washing water depending on the cleaning state in the duct using an endoscope camera.

Of course, the structure of the ventilation duct cleaning device 300 according to the embodiment of the present invention for cleaning the ventilation duct can be very diverse. Other structures will be described subsequently with reference to FIG.

FIG. 6 is an exemplary view of the guide portion 230 ′ constituting the ventilation duct cleaning device of FIG. 2.

As shown in FIG. 6, the ventilation duct cleaning device 300 of FIG. 2 according to the embodiment of the present invention can include a guide portion 230 ′ having a structure as shown in FIG.

Compared with the structure of FIG. 3, the guide portion 230'of FIG. 6 has a structure in which a plurality of paths are connected to each other and includes open / close switches 230a'and 230b'inside. The internal flow path can be opened and closed by controlling the open / close switches 231a'and 231b'.

As a result, when negative pressure is provided from the negative pressure generator 210, the first switch 231a'is opened to provide negative pressure to the ventilation duct 130 for a certain period of time, and water or a cleaning member is sent to the recovery member 220. At the time of recovery, the first switch 231a'is closed and the second switch 231b' is opened.

Such a method can select and set an appropriate time by various experiments. In particular, in order to determine whether or not water or a cleaning member can be recovered, for example, a sensor may be further included, whereby the open / close switches 231a'and 231b' can be effectively controlled. It will not be particularly limited to a certain form. For example, if a certain period of time (for example, several seconds) elapses after the time when the cleaning member is charged, the second path to which the negative pressure is provided may be blocked and the third path may be opened at the same time.

FIG. 7 is a flowchart of a ventilation duct cleaning method according to an embodiment of the present invention.

The ventilation duct cleaning method according to the present invention is a method of cleaning the ventilation duct using the ventilation duct cleaning device described above, and the ventilation duct is provided with a negative pressure generated at one end of the ventilation duct by the negative pressure generator. After the washing water supply step (S1000) in which the washing water is sucked and supplied at the other end, and after the washing water supply step, the ventilation duct is in a state where the negative pressure is generated at one end of the ventilation duct by the negative pressure generator. After the cleaning member supply step (S2000) in which an atypical textile-type cleaning member is sucked and supplied to the other end of the cleaning member and the cleaning member supply stage, a negative pressure is generated at one end of the ventilation duct by the negative pressure generator. In this state, the cleaning water and cleaning member recovery step (S3000) for recovering the cleaning water supplied in the cleaning water supply stage and the cleaning member supply stage and the cleaning member to the collection member constituting the ventilation duct cleaning device are performed. Can be included.

For convenience of explanation, referring to FIG. 7 together with FIG. 2, the ventilation duct cleaning method according to the embodiment of the present invention operates the ventilation duct cleaning device 300 connected to one side of the ventilation duct to operate a negative pressure inside the ventilation duct. Can be started by generating.

First, with the negative pressure generated at one end of the ventilation duct by the negative pressure generator, the washing water supply step (S1000) of sucking and supplying the washing water to the other end of the ventilation duct can be performed. The time points between the cleaning water supply and the cleaning member supply can be controlled so that there is a time lag. That is, by supplying water to the ventilation duct first and applying the water to the entire ventilation duct, dust or strong dirt is swelled.

Specifically, the initial input amount of washing water, for example, water at the washing water supply stage can be 5 liters or less when using a duct having a diameter of 80 mm or less, and 10 liters or less when using a duct having a diameter of 160 mm or less. It is preferable that the length of the ventilation duct is 50 meters (m) or less in order to prevent the ventilation duct from being blocked and to effectively clean the ventilation duct. That is as mentioned above.

Then, after the washing water supply step (S1000), an atypical textile-type washing member is sucked into the other end of the ventilation duct in a state where the negative pressure is generated at one end of the ventilation duct by the negative pressure generator. The cleaning member supply step (S2000) to be supplied can be performed. The cleaning member is preferably made of atypical fabric.

The cleaning efficiency can be further improved by a method in which the cleaning member is supplied to the inside of the ventilation duct in a state of being wet with cleaning water or the like.

If the inside of the ventilation duct is sufficiently wet with the cleaning water before the cleaning member is put in, or if the cleaning water is supplied to the extent that the flow of the cleaning water is generated, turbulence will be generated inside the ventilation duct and the inner peripheral surface of the ventilation duct will be generated. If the negative pressure is removed, an environment in which a certain amount of water flows along the pipe can be created. Here, if an atypical cleaning member such as a cloth or towel is subsequently thrown in, the cleaning member is pushed along the inner peripheral surface of the cleaning pipe without a gap together with the water remaining in the ventilation duct, and dust or strong dirt is caused by friction. Can be removed.

In particular, it is preferable that the cleaning member put into the ventilation duct is atypical. That is, when the cleaning member has a fixed shape such as a sphere or a polygon having a certain shape, the form of the cleaning member was changed in various ways and the experiment was conducted. ， Of the cleaning members, the part that is used to clean the inner peripheral surface of the ventilation duct during the cleaning process of the inner peripheral surface of the ventilation duct and is contaminated (the circumference of the maximum diameter) and the part that is not are clearly distinguished. Therefore, it was confirmed that the entire area of the cleaning member could not be used for cleaning.

In addition, the standard cleaning members were not easy to clean, dehydrate, or dry. However, when cleaning members such as atypical fabrics or towels are used, they are negatively transferred to the ventilation duct, and their morphology is continuously changed along the length of the ventilation duct, cleaning in the longitudinal direction inside the ventilation duct. It was confirmed that the area was formed long and the cleaning area could be fully utilized.

Then, in the cleaning member supply stage (S2000), the length of the cleaning area, which is the area occupied inside the ventilation duct while passing through the ventilation duct, is 1.4 times or more and 3.7 times or less the inner diameter of the ventilation duct. It was confirmed that it is preferable to determine the size of the cleaning member so as to be.

When the length of the cleaning area of the cleaning member is 1.4 times or less of the inner diameter of the ventilation duct, the cleaning member is cleaned three times or more with the same cleaning member as a result of checking with an endoscope when cleaning the cleaning member once. Even so, about 10 contaminated areas (uncleaned areas) with an area of 30 mm ² or more that can be easily identified by endoscopic photography are found in the 1 m (m) section of the ventilation duct, which is a cleaning effect. However, it was confirmed that if the length of the cleaning area is 3.7 times or more the inner diameter of the ventilation duct, the cleaning member may be easily clogged inside the ventilation duct and cannot be recovered.

The length of the cleaning area changes depending on the size of the cleaning member (or the volume in a solidified state), and the cleaning member occupies by removing the negative pressure from the ventilation duct while the cleaning member flows in the ventilation duct. It was investigated by the method of measuring the length to be washed.

After all, the size or volume of the cleaning member is determined so that the length of the cleaning area by the cleaning member supplied in the cleaning member supply stage (S2000) is 1.4 times or more and 3.7 times or less the inner diameter of the ventilation duct. However, at the time of one-time cleaning of the cleaning member, 3 or less contaminated areas (uncleaned areas) with an area of 30 mm ² or more were found in the 1 meter (m) section of the ventilation duct, so cleaning at a satisfactory level. It was confirmed that the quality could be obtained.

Then, it is also possible to induce the soothing effect of the pollutant by interrupting the operation of the negative pressure generator within a predetermined time between the cleaning water supply stage (S1000) and the cleaning member supply stage (S2000). Is.

The negative pressure generator can be used not only for supplying or collecting cleaning water or cleaning members, but also for drying the ventilation duct for which cleaning has been completed.

After the cleaning water and cleaning member recovery step (S3000), the ventilation duct drying step (S4000) can be performed by operating the negative pressure generator to dry the inside of the ventilation duct for which cleaning has been completed.

Further, as described above, the cleaning water supply step (S1000), the cleaning member supply step (S2000), and the cleaning water and cleaning member recovery step (S3000) may be repeated a plurality of times depending on the contaminated state of the ventilation duct. It is possible to perform an endoscopy stage in which an endoscope is inserted into one end or the other end of the ventilation duct to check the cleaning condition of the ventilation duct.

FIG. 8 is a flowchart of the ventilation duct cleaning process according to another embodiment of the present invention.

The ventilation duct cleaning method shown in FIG. 8 corresponds to a form in which the ventilation duct cleaning device includes the guide portion 230'and the like in FIG.

Therefore, prior to the cleaning supply stage (S1000) and the cleaning member supply stage (S2000), only the first switch 231a'is opened (S900) to provide negative pressure to the ventilation duct for a certain period of time to provide cleaning water and the cleaning member. By providing a driving force for the transfer of the first switch 231a'and opening the second switch 231b' immediately before the washing water and the washing member are collected by the recovery member 220 by negative pressure. Cleaning water and cleaning members can be recovered by inertia.

Such a method can be set by selecting an appropriate time (for example, several seconds) by various experiments. In particular, in order to determine whether or not water or the cleaning member can be recovered, for example, a sensor or the like is further included, and it is possible to effectively control the open / close switches 231a'and 231b'. Various operations other than the above contents are possible, but since the other detailed contents have been fully explained above, the contents will be used instead.

This specification has been described with reference to preferred embodiments of the invention, but those skilled in the art will not deviate from the ideas and areas of the invention described in the claims described below. The present invention may be modified and modified in various ways. Therefore, any modified practice should be considered to be within the technical scope of the invention, including the components of the claims of the invention.

Claims (17)

A negative pressure generator that generates negative pressure and a negative pressure generator
A first connecting portion connected to a ventilation duct, a second connecting portion receiving negative pressure generated by the negative pressure generator, and a negative pressure transmission path between the first connecting portion and the second connecting portion are formed. A collection member that collects water that is sucked into the inside of the other side of the ventilation duct due to the negative pressure generated and a cleaning member that is thrown in after sucking the water through the storage unit.
Ventilation duct cleaning device including. The ventilation duct cleaning device according to claim 1, wherein the negative pressure generating device provides negative pressure directly to the second connecting portion or indirectly to the second connecting portion via the enclosed space. The ventilation according to claim 2, further comprising a main body portion that houses the recovery member and forms the closed space inside, and the one-side opening port of the second connecting portion is exposed to the closed space and receives the negative pressure. Duct cleaning device. The main body includes a mounting portion on which the negative pressure generator is mounted, further includes a rubber packing provided along the outer edge of the mounting portion, and when the negative pressure generating device is mounted on the mounting portion. The ventilation duct cleaning device according to claim 3, which forms the closed space. The ventilation duct cleaning according to claim 4, wherein the height of the region where the negative pressure generator is mounted is lower than the height of the region where the accommodating member is accommodated, and the side cross section is formed in an'L'shape. Device. The ventilation duct cleaning device according to claim 1, wherein the cleaning member is an atypical woven fabric. The area of the cleaning member or the length of the cleaning area, which is the area occupied inside the ventilation duct while passing through the ventilation duct, is 1.4 times or more and 3.7 times or less the inner diameter of the ventilation duct. The ventilation duct cleaning device according to claim 6, wherein the volume is determined. The ventilation duct cleaning device according to claim 1, wherein when the diameter of the ventilation duct is 80 mm or less and the length is 50 meters or less, the amount of water injected into the ventilation duct at one time is 5 liters or less. The ventilation duct is made of a resin material, and the outer surface of the ventilation duct has a corrugation structure in which ridges and valleys are repeated, but the inner surface has a flat structure, and the negative pressure generator has a degree of vacuum inside the ventilation duct. The ventilation duct cleaning device according to claim 8, wherein the negative pressure is provided so as to be from 1500 mm (mmH ₂ O) to 7000 mm (mmH ₂ O). The ventilation duct cleaning device according to claim 1, wherein the operation of the negative pressure generating device is stopped within a predetermined time from after the suction of the washing water to before the suction of the cleaning member. The negative pressure generator is connected so as to directly supply the negative pressure to the second connecting portion, and the first connecting portion or the second connecting portion opens a flow path to the connecting portion with the accommodating portion. The ventilation duct cleaning device according to claim 1, further comprising an open / close switch for closing. A method of cleaning a ventilation duct using the ventilation duct cleaning device according to any one of claims 1 to 6.
A cleaning water supply stage in which the negative pressure is generated at one end of the ventilation duct by the negative pressure generator, and the cleaning water is sucked and supplied to the other end of the ventilation duct.
After the cleaning water supply stage, a cleaning member that sucks and supplies an atypical textile-type cleaning member to the other end of the ventilation duct in a state where negative pressure is generated at one end of the ventilation duct by the negative pressure generator. Supply stage and
After the cleaning member supply stage, the cleaning water and the cleaning member supplied in the cleaning water supply stage and the cleaning member supply stage in a state where the negative pressure is generated at one end of the ventilation duct by the negative pressure generator. , The cleaning water to be collected in the collection member constituting the ventilation duct cleaning device and the cleaning member collection stage,
Ventilation duct cleaning method, including. The ventilation according to claim 12, wherein when the diameter of the ventilation duct is 80 mm or less and the length is 50 meters or less at the washing water supply stage, the amount of water injected into the ventilation duct at one time is 5 liters or less. Duct cleaning method. When the ventilation duct is made of a resin material and the outer surface of the ventilation duct has a corrugation structure in which ridges and valleys are repeated, but the inner surface has a flat structure, the cleaning water supply stage, the cleaning member supply stage, and the cleaning water And at the cleaning member recovery stage, the negative pressure generator provides negative pressure so that the degree of vacuum inside the ventilation duct is 1500 mmH ₂ O to 7000 mmH ₂ O. 12. The ventilation duct cleaning method according to 12. The length of the cleaning area, which is the area occupied inside the ventilation duct while the cleaning member passes through the ventilation duct at the stage of supplying the cleaning member, is 1.4 times or more and 3.7 times or less the inner diameter of the ventilation duct. The ventilation duct cleaning method according to claim 12, wherein the area or volume of the cleaning member is determined. The ventilation duct cleaning method according to claim 12, wherein the operation of the negative pressure generator is interrupted within a predetermined time between the cleaning water supply stage and the cleaning member supply stage. The ventilation duct cleaning method according to claim 12, further comprising a ventilation duct drying step of operating the negative pressure generator to dry the inside of the ventilation duct for which cleaning has been completed after the cleaning water and cleaning member recovery step.

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