JP2012242058A - Air lance for air conditioning duct and method of cleaning air conditioning duct in vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily clean an air conditioning duct which is weak in strength like an air conditioning duct installed in a vehicle without causing the deformation or breakage of the duct.SOLUTION: A tip hose 2 fitted at the tip of a tubular lance body 1 is divided into a plurality of tip pieces 21 by forming a plurality of cuts 20 from the halfway position of overall length to a tip edge. The rear end of the lance body 1 is connected to a supply source 8 for compressed air, and is made to enter openings 30, 350 originally formed in an air conditioning duct 3 to position the tip hose 2 in the air conditioning duct 3, and compressed air is discharged from the tip hose 2 through the lance body 1 to remove dirt by striking the inner surface of the air conditioning duct 3 by the movement of the respective tip pieces 21 on this occasion.

Description

  The invention of the present application relates to cleaning of an air conditioning duct.

In an air conditioning duct such as a building, it is inevitable that dirt such as dust adheres to the inner surface of the duct when used for a long time. If these stains are left unattended, there are problems such as deterioration of the indoor environment (house dust and the like), deterioration of the function of the air conditioner, failure and the like. For this reason, conventionally, the maintenance which cleans the inside of an air-conditioning duct and removes dirt regularly is performed.
Air-conditioning duct cleaning is often performed by specialized cleaners. The cleaning contractor is performed by opening a hole for cleaning in a part of the air-conditioning duct, attaching a collection suction duct there, and connecting the suction duct to a dust collector. At this time, dirt such as dust and dirt adhering to the inner surface of the air conditioning duct is knocked down in advance by a jig called an air lance so as to remove dirt more efficiently and sufficiently.

FIG. 5 is a schematic diagram of a conventional air lance cleaning air lance, and FIG. 6 is a schematic diagram illustrating air conditioning duct cleaning using a conventional air lance.
The conventional air lance has a structure in which a soft tip hose 2 is attached to the tip of the lance body 1. In the example shown in FIG. 5, three tip hoses 2 are attached. The three tip hoses 2 are connected to the tip portion of the lance body 1 through a joint 10.
The lance body 1 is also a hollow hose-like member. For cleaning, a hole (hereinafter referred to as a cleaning panel hole) 40 is formed in the ceiling panel 4, and a hole (hereinafter referred to as a cleaning duct hole) 300 is also formed for the air conditioning duct 3 for cleaning. Then, as shown in FIG. 6, the lance body 1 is inserted through the cleaning panel hole 40 and the cleaning duct hole 300, and the tip hose 2 enters the air conditioning duct 3. A compressor (not shown) is connected to the rear end of the lance body 1. Compressed air is sent by the compressor, and the compressed air is expelled from the tip hose 2 through the lance body 1. At this time, the soft tip hose 2 is in a state of dancing flutteringly, whereby the inner surface of the air conditioning duct 3 is hit and the dirt is removed.

Utility Model Registration Gazette No. 2514418

Conventionally, air conditioning duct cleaning has been performed only for buildings such as buildings and condominiums, but it is now being studied to perform air conditioning ducts in vehicles such as trains and airplanes. According to the inventors' research, it has been found that special consideration is required for the air-conditioning ducts in these vehicles.
Specifically, the air conditioning duct in the vehicle has a different structure from the air conditioning duct in a building such as a building for weight reduction. Air-conditioning ducts in buildings such as buildings are relatively sturdy steel products, and there is often no problem even if they are struck with a large force. However, air conditioning ducts in vehicles are often weak in strength to reduce weight. For example, a structure in which a heat insulating material (glass wool or the like) is compressed and hardened to some extent may be used, which is considerably weaker than a steel structure in a building. It has been found by the inventors' research that the air-conditioning duct may be deformed or damaged when the air-conditioning duct having such a weak strength is cleaned using a conventional air lance. Although it is conceivable to prevent deformation and breakage of the air conditioning duct by adjusting the compressed air delivery pressure by the compressor, delicate adjustment is necessary, which is very troublesome.
The invention of the present application has been made to solve the above-described problems, and easily cleans an air-conditioning duct that is weak in strength, such as an air-conditioning duct installed in a vehicle, without causing deformation or breakage of the duct. The purpose is to be able to.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is an air lance for air conditioning duct cleaning that removes dirt by hitting the inner surface of the air conditioning duct by movement when discharging compressed air from the tip,
It consists of a tubular lance body whose rear end communicates with a compressed air supply source, and a tip hose attached to the tip of the lance body,
The tip hose has a configuration of being divided into a plurality of tip pieces by forming a plurality of cuts in the length direction from a position in the middle of the total length of the tip hose to the tip edge.
In order to solve the above problem, the invention according to claim 2 is a method for cleaning an air conditioning duct in a vehicle that removes dirt on the inner surface of the air conditioning duct installed in the vehicle.
It is a method of using an air lance consisting of a lance body and a tip hose attached to the tip of the lance body,
The tip end hose of the air lance has a shape divided into a plurality of tip pieces by forming a plurality of cuts in the length direction from the midway position of the tip hose to the tip edge,
The rear end of the air lance is communicated with a compressed air supply source, and the air lance is advanced through an opening originally formed in the air conditioning duct so that the tip hose is positioned in the air conditioning duct, and compressed air is supplied in this state. The dirt attached to the inner surface is removed by letting the tip piece of the tip hose hit the inner surface of the air conditioning duct.
Then, it has the structure that it is a method performed by collecting the removed dirt with a dust collector.
In order to solve the above-mentioned problem, the invention according to claim 3 has a configuration in which the vehicle is a railway vehicle or an airplane in the configuration of claim 2.

As described below, according to the invention described in claim 1 of the present application, the tip hose has a shape divided into a plurality of tip pieces by forming a plurality of cuts in the length direction from the tip edge. When dancing and hitting the inner surface of the air-conditioning duct by releasing air, it becomes a softer hit state. Therefore, it is particularly suitable for cleaning an air conditioning duct that is weak in strength, such as an air conditioning duct made of a heat insulating material. In addition, since each notch is formed from a position in the middle of the entire length of the tip hose to the tip edge, it is a suitable configuration in terms of adjusting the hitting strength and durability of the tip hose. Furthermore, since there are a plurality of tip pieces, dirt can be struck efficiently over a wider area.
Further, according to the invention described in claim 2, since the air lance is made to enter through the opening originally formed in the air conditioning duct in the vehicle and the dirt is knocked down, the air conditioning duct cleaning is suitably performed without impairing the safety of the vehicle. Is implemented and can maintain a comfortable cabin environment. At this time, since the tip hose has a shape divided into a plurality of tip pieces by forming a plurality of cuts in the length direction from the tip edge, when dancing and hitting the inner surface of the air conditioning duct by releasing compressed air, It will be in a state of hitting softly. For this reason, it is possible to remove the dirt without causing deformation or breakage of the lighter and weaker air-conditioning duct. In addition, since each notch is formed from a position in the middle of the entire length of the tip hose to the tip edge, it is a suitable configuration in terms of adjusting the hitting strength and durability of the tip hose. Furthermore, since there are a plurality of tip pieces, dirt can be struck efficiently over a wider area.

It is the schematic of the air lance for air-conditioning duct cleaning which concerns on embodiment of this invention. It is the plane schematic shown about the air-conditioning duct in which the cleaning method of the air-conditioning duct in a vehicle which concerns on embodiment of this invention is implemented. It is the side surface schematic diagram shown about the air-conditioning duct in which the cleaning method of the in-vehicle air-conditioning duct concerning the embodiment of the present invention is carried out. FIG. 4 is a schematic side sectional view showing a state in which the cleaning method of the present embodiment is performed on the air conditioning duct shown in FIGS. 2 and 3. It is the schematic of the conventional air lance for air-conditioning duct cleaning. It is the schematic shown about the duct cleaning using the conventional air lance.

Next, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described.
First, an embodiment of the air lance duct cleaning air lance will be described. FIG. 1 is a schematic view of an air conditioning duct cleaning air lance according to an embodiment of the present invention. The air lance shown in FIG. 1 includes a lance main body 1 and a tip hose 2 attached to the tip of the lance main body 1 in the same manner as the conventional one shown in FIG.
The lance body 1 is made of a metal such as aluminum in the present embodiment. The air lance of this embodiment is for cleaning a duct installed in a vehicle, and the lance body 1 is bent in advance as shown in FIG. 1 in consideration of this. The reason for this will be described later. In addition, it is possible to use a material that can be plastically deformed as the material of the lance body 1 and to use it after being deformed into an appropriate shape.

  The tip hose 2 is made of a resin such as polyvinyl chloride and has sufficient flexibility and durability, but the same water hose used for watering can be used. As shown in FIG. 1, the tip hose 2 has a shape divided into a plurality of tip pieces 21 by forming a plurality of cuts 20 in the length direction from the tip edge. In this embodiment, three cuts 20 are formed and divided into three tip pieces 21. The cross section of the tip hose 2 is circular, and the notches 20 are spaced 120 degrees. Therefore, the width of each tip piece 21 is the same. However, there are cases where the formation interval of the notches 20 is changed so that the widths of the tip pieces 21 are different from each other.

Each cut 20 is formed from a position in the middle of the entire length of the tip hose 2 to the tip edge. In this embodiment, each notch 20 is formed from a position that is approximately half the entire length of the tip hose 2 to the tip edge. However, this is not limiting, and the notch 20 may be started from another position. The lengths of the notches 20 are the same, and therefore the lengths of the tip pieces 21 are also the same. However, the length of each notch 20 may be changed, and the length of each tip piece 21 may be different from each other.
The tip hose 2 is attached by fitting the rear end (base portion) into the lance body 1. The inner diameter of the tip hose 2 is slightly larger than the outer diameter of the tip portion of the lance body 1, and is fitted into the lance body 1 while slightly expanding the tip portion of the tip hose 2 using the elasticity of the tip hose 2. Yes. In addition, in order to raise the connection strength with respect to the lance main body 1 of the tip hose 2, an appropriate binding tool etc. may be used.

Next, an embodiment of the invention of a method for cleaning a vehicle air conditioning duct will be described. The following description is also an explanation of how to use the air lance of the above embodiment.
2 and 3 are views showing the structure of an air conditioning duct in which the method for cleaning an air conditioning duct in a vehicle according to the embodiment is performed, FIG. 2 is a schematic plan view, and FIG. 3 is a schematic side sectional view.
In this embodiment, a railway vehicle is assumed as a vehicle, and what is shown in FIGS. 2 and 3 is a train that runs on a conventional line in an urban area, a subway, or the like. The air-conditioning duct 3 is installed on the back side (upper side) of the ceiling panel 4 of the vehicle and is not visible from the cabin.

The two air-conditioning ducts 3 are symmetric with respect to a vertical center line C of the vehicle, and FIG. 3 shows the left-side vehicle duct 3 as an example. Each of the air-conditioning ducts 3 has a substantially round cross-sectional shape as a whole, and has both side plate portions 31 and 32 in a vertical posture, an upper plate portion 33 in a slightly oblique posture, and a lower plate portion in a horizontal posture. 34. The upper plate portion 33 has an oblique shape that increases toward the center line C of the vehicle.
Of the side plate portions 31 and 32, the side 31 close to the center line C is called a center side plate portion, and the far side 32 is called an outer side plate portion. The outer side plate portion 32 is provided at a position away from the outer edge of the lower plate portion 34, and there is a large gap between the lower edge of the outer side plate portion 32 and the lower plate portion 34. The gap 30 is an air conditioning opening (hereinafter referred to as a duct opening) in the cabin. The duct opening 30 extends in the length direction of the duct and has a slightly wide slit shape.

A portion 35 is provided by extending the lower plate portion 34 upward from the outer edge thereof. This part 35 partitions an air supply path in the duct, and is hereinafter referred to as an internal partition part. The internal partition portion 35 and the outer side plate portion 32 face each other with a width corresponding to the duct opening 30 as shown in FIG. The facing space 38 is a downward air supply path (hereinafter referred to as an air path) into the cabin.
In the duct opening 30, louvers 51 and 52 are provided. The louvers 51 and 52 are for preventing the air conditioning duct 3 from being seen from the guest room while forming a wind passage for air conditioning. Two louvers are provided on the upper and lower sides (hereinafter, upper louver 51 and lower louver 52).

The ceiling panel 4 is similarly provided with an opening (hereinafter referred to as a panel opening) according to the position of the duct opening 30 of the air conditioning duct 3. The upper louver 51 is detachably attached to the edge of the panel opening. Legs 61 are provided at both ends of the upper louver 51. A plurality of leg portions 61 are provided at intervals in the length direction of the upper louver 51 (length direction of the air conditioning duct 3). Each leg portion 61 is screwed to the edge of the panel opening, so that the upper louver 51 is attached to the edge of the panel opening.
The lower louver 52 is connected to the upper louver 51 by a connector 62. The coupler 62 is coupled in a state where the lower louver 52 is suspended from the upper louver 51. A plurality of connectors 62 are also provided at intervals in the length direction of the louvers 51 and 52. The upper louver 51 together with the lower louver 5 can be removed from the ceiling panel 4 by removing screws (not shown) of the leg portions 61 on both sides and pulling them down as they are.

Further, the width of the lower louver 52 and the upper louver 51 is narrower than the distance between the outer side plate portion 32 and the inner partition portion 35, and narrow slits are formed on both sides of the lower louver 52 and the upper louver 51. ing. These slits serve as air vents for the air sent into the cabin. In addition, each leg part 61 and each connection tool 62 are small plate-shaped members, are provided in the standing state, and do not block each slit.
Moreover, although the upper end part of the internal partition part 35 is bent as shown in FIG. 3, the upper end edge does not contact the upper board part 33, and the clearance gap 350 is formed between both. The gap 350 also has a slit shape extending in the length direction. This gap is hereinafter referred to as an upper opening.

  The pair of left and right air-conditioning ducts 3 having such a shape and structure are attached to a structural portion of the ceiling portion of the vehicle by a fixture (not shown). The ceiling panel 4 is provided with rib plates 37 for attachment and reinforcement of the air conditioning ducts 3. The rib plates 37 are formed in a posture along the width direction of the vehicle, and are provided at several positions at intervals in the length direction of the vehicle. The rib plate 37 passes through the lower plate portion 34 of the air conditioning duct 3 and is fixed to the ceiling panel 4, thereby fixing and reinforcing the air conditioning duct 3.

  Each air-conditioning duct 3 having such a shape and structure is formed by compressing and solidifying a heat insulating material to some extent. That is, it is compressed to some extent while bending a heat insulating material such as glass wool to give a certain rigidity, and has a shape composed of the both side plate portions 31, 32, the upper plate portion 33, the lower plate portion 34, and the internal partition portion 35 described above. To do. In addition, since the surface of a heat insulating material is covered with the surface sheet like aluminum foil, and is compressed in the state, the surface of each part of the air-conditioning duct 3 is often in a state covered with the surface sheet.

Cleaning of the in-vehicle air conditioning duct 3 having such a shape and structure will be described with reference to FIG. FIG. 4 is a schematic side sectional view showing a state in which the cleaning method of the present embodiment is performed on the air conditioning duct shown in FIGS. 2 and 3.
When cleaning is performed, the air lance is connected to and communicated with a compressed air supply source (typically a compressor) 8. The connection is usually made by connecting the rear end of the lance body 1 and the supply source 8 with a connection tube 81.

  Next, as shown in FIG. 4, the air lance enters the air conditioning duct 3, and the tip hose 2 is positioned in the air conditioning duct 3. More specifically, as described above, the upper louver 51 and the lower louver 52 are pulled out and removed from the ceiling panel 4. Then, the air lance enters the air conditioning duct 3 through the air passage 38, and the tip hose 2 is positioned between the internal partition part 35 and the central side plate part 31 through the upper opening 350. At this time, the lance body 1 is inserted into the upper opening 350. The operator is in a state of holding the rear end portion of the lance body 1 in the air passage 38.

  When compressed air is supplied from the supply source 8 in this state, the compressed air is released from the tip hose 2, and at this time, each tip piece 21 of the tip hose 2 moves as shown in FIG. Strike the inner surface of the duct 3. Thereby, dirt (dust, dust, etc.) adhering to the inner surface is removed. While the lance body 1 is inserted through the outer slit 54 and the upper opening 350, the air lance is moved in the length direction of the air conditioning duct 3, and each tip piece 21 of the tip hose 2 is similarly danced at another location. The dirt on the inner surface of the air conditioning duct 3 is struck down.

  In this way, after the dirt is knocked down over the entire length of the air conditioning duct 3, a suction duct (not shown) is connected to the end of the air conditioning duct 3 in the length direction. At the end of the air conditioning duct 3 in the length direction, a connection port of a communication duct that connects the air conditioner provided in the vehicle and the air conditioning duct 3 is provided. The communication duct is removed from this connection port, and one end of the suction duct is connected. The other end of the suction duct is connected to a dust collector. In this state, the dust collector is operated, and the smashed dirt is sucked through the suction duct and collected by the dust collector. When the dirt is sufficiently sucked and removed, the cleaning is finished, the suction duct is removed, and the communication duct is connected as it is. The upper louver 51 and the lower louver 52 are also set as before. Thereby, the cleaning of one air conditioning duct 3 is completed, and the other air conditioning duct 3 is similarly cleaned. In some cases, compressed air is supplied to knock down dirt by the tip hose 2 and at the same time, dirt is sucked by the dust collector. In addition, dirt may be sucked by inserting a suction duct into the air conditioning duct 3 through the duct opening 30 and the upper opening 350.

  According to the air lance of the embodiment described above and the method of cleaning the air conditioning duct 3 using this air lance, the tip hose 2 divided into a plurality of tip pieces 21 by forming a plurality of cuts 20 in the length direction from the tip edge. Therefore, when each tip piece 21 dances and hits the inner surface of the air conditioning duct 3 due to the release of compressed air, it becomes a softer hitting state. In the conventional air lance, since the entire tip hose dances and strikes the inner surface, it strikes due to the weight of the entire tip hose, and the impact is great. Compared with this, in this embodiment, since each tip piece 21 formed by being struck hits the inner surface, the impact is small compared to the conventional case, and it is in a soft tapping state. For this reason, it is particularly suitable for cleaning an air conditioning duct that is weak in strength, such as the above-described air conditioning duct made of a heat insulating material.

  Further, in the tip hose 2, the point that each notch 20 is formed from a position in the middle of the length of the tip hose 2 to the tip edge is a suitable configuration in terms of adjusting the knocking strength and durability of the tip hose 2. It has become. The configuration in which the cut 20 is formed over the entire length corresponds to a configuration in which the tip hose 2 is cut in the length direction to form a plurality of tip pieces 21 and fixed to the tip of the lance body 1. Even with such a configuration, the hitting strength can be adjusted more softly than before, but it is not easy to adjust the hitting strength. When adjusting the knock-off strength, the tip piece 21 is replaced with another tip piece 21 having a different length and the supply pressure of the compressed air is adjusted. However, the tip piece 21 is troublesome to replace. In the case of the air lance according to the embodiment, first, the length of the notch 20 is shortened, the compressed air supply pressure is kept small, and when the knocking strength is increased, the notch 20 is further inserted to supply the compressed air supply pressure. Should be made larger. Since the cut 20 can be deepened by using a cutter in the field, it is extremely easy. Further, in the structure in which the separated tip piece 21 is fixed to the lance main body 1, the tip piece 21 is narrow, so that it easily breaks at the root portion, which may cause a problem in terms of durability. If the notch 20 is kept at an intermediate length, the lance body 1 can be attached to the lance body 1 by fitting the root portion of the tip hose 2, so that there is no problem in terms of durability. Note that the fact that there are a plurality of tip pieces 21 contributes to the efficient removal of dirt over a wider area.

  Moreover, in the method of this embodiment, an air lance is made to approach through the openings 30 and 350 originally formed in the air-conditioning duct 3 and the dirt is knocked down. As in the prior art, the air conditioning duct 3 is not perforated for cleaning. This point is closely related to the cleaning of the in-vehicle air conditioning duct 3. Vehicles such as railway vehicles and airplanes move at high speed, and each part is designed and manufactured to withstand impacts. On the other hand, the air conditioning duct 3 is cleaned afterwards, and it is generally not preferable to make holes in the vehicle for cleaning. In the case of a building such as a building, a cleaning hole is opened (perforation work is performed), and after cleaning, the cleaning hole is closed with a dedicated lid. This may also be done for the air conditioning ducts in the vehicle, but special considerations are necessary to prevent the lid from falling in vehicles that operate at high speeds. Opening after the fact (which is a kind of improvement) may not be allowed. Also, there are cases where transportation companies that operate vehicles do not allow or disagree with safety standards. In consideration of such a situation, in this embodiment, the air lance is made to enter through the openings 30 and 350 that are originally provided, so that the dirt is knocked down.

In the said embodiment, although the air-conditioning duct 3 was provided in the back side (upper side) of the ceiling panel 4, depending on the vehicle, it may be provided in the lower side of the floor of a guest room. In this case as well, there is a case where dirt can be knocked down by simply removing an object such as a cover or a lid, and the present invention can be applied to such an air conditioning duct.
In the above embodiment, the vehicle is a train. However, the vehicle may be a railway vehicle other than a train, or may be another vehicle such as an airplane or a bus.
It should be noted that the air lance duct cleaning air lance embodiment need not be for cleaning an air conditioning duct in a vehicle, but may be for cleaning an air conditioning duct in a building such as a building.

As for the cuts provided in the tip hose, at least two cuts are required (at least two tip pieces need to be formed), but four, five or more cuts are formed and four cuts are made. Five or more tip pieces may be formed.
The length of the tip piece may be adjusted by deepening the cut with a cutter on site as described above, but multiple types of tip hoses with different cut lengths are prepared, Adjustments may be made while changing. Furthermore, it is also preferable that a plurality of types of tip hoses having different lengths or different flexibility are prepared and replaced.

  As described above, the present invention provides an air lance that can clean the inner surface of an air conditioning duct that is weak in strength without causing damage or the like. Therefore, the present invention is used by a cleaning contractor that cleans an air conditioning duct installed in a vehicle. And its industrial applicability is significant.

DESCRIPTION OF SYMBOLS 1 Lance main body 2 Tip hose 20 Notch 21 Tip piece 3 Air conditioning duct 31 Center side plate part 32 Outer side plate part 33 Upper plate part 34 Lower plate part 35 Internal partition part 350 Upper opening 4 Ceiling panel 8 Supply source of compressed air

In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is an air lance for air conditioning duct cleaning that removes dirt by hitting the inner surface of the air conditioning duct by movement when discharging compressed air from the tip,
It consists of a tubular lance body whose rear end communicates with a compressed air supply source, and a tip hose attached to the tip of the lance body,
Tip hose, Ri shape der which is divided into a plurality of tip pieces by cut from the middle position of the total length of the tip hose plurality lengthwise to the front end edge thereof,
Cuts, has a configuration that Ru der two or more five or less.
In order to solve the above problem, the invention according to claim 2 is a method for cleaning an air conditioning duct in a vehicle that removes dirt on the inner surface of the air conditioning duct installed in the vehicle.
It is a method of using an air lance consisting of a lance body and a tip hose attached to the tip of the lance body,
The tip end hose of the air lance has a shape divided into a plurality of tip pieces by forming a plurality of cuts in the length direction from the midway position of the tip hose to the tip edge,
The rear end of the air lance is communicated with a compressed air supply source, and the air lance is advanced through an opening originally formed in the air conditioning duct so that the tip hose is positioned in the air conditioning duct, and compressed air is supplied in this state. The dirt attached to the inner surface is removed by letting the tip piece of the tip hose hit the inner surface of the air conditioning duct.
Then, Ri method der carried out by collecting the dropped dirty with dust collector,
The strength when the tip piece tip hose hit the inner surface of the air-conditioning duct has a configuration that in the field for cleaning the depth of cut of the tip hose you adjusted by deeply cutter.
In order to solve the above-mentioned problem, the invention according to claim 3 has a configuration in which the vehicle is a railway vehicle or an airplane in the configuration of claim 2.
In order to solve the above problem, the invention according to claim 4 has a configuration in which the number of the cuts is two or more and five or less in the configuration of claim 2 or 3.

As described below, according to the invention described in claim 1 of the present application, the tip hose has a shape divided into a plurality of tip pieces by forming a plurality of cuts in the length direction from the tip edge. When dancing and hitting the inner surface of the air-conditioning duct by releasing air, it becomes a softer hit state. Therefore, it is particularly suitable for cleaning an air conditioning duct that is weak in strength, such as an air conditioning duct made of a heat insulating material. In addition, since each notch is formed from a position in the middle of the entire length of the tip hose to the tip edge, it is a suitable configuration in terms of adjusting the hitting strength and durability of the tip hose. Furthermore, since there are a plurality of tip pieces, dirt can be struck efficiently over a wider area.
Further, according to the invention described in claim 2, since the air lance is made to enter through the opening originally formed in the air conditioning duct in the vehicle and the dirt is knocked down, the air conditioning duct cleaning is suitably performed without impairing the safety of the vehicle. Is implemented and can maintain a comfortable cabin environment. At this time, since the tip hose has a shape divided into a plurality of tip pieces by forming a plurality of cuts in the length direction from the tip edge, when dancing and hitting the inner surface of the air conditioning duct by releasing compressed air, It will be in a state of hitting softly. For this reason, it is possible to remove the dirt without causing deformation or breakage of the lighter and weaker air-conditioning duct. In addition, since each notch is formed from a position in the middle of the entire length of the tip hose to the tip edge, it is a suitable configuration in terms of adjusting the hitting strength and durability of the tip hose. Furthermore, since there are a plurality of tip pieces, dirt can be struck efficiently over a wider area. In addition, the strength of the hammer is adjusted by deepening the depth of cut with a cutter at the cleaning site, so that the adjustment is very easy.

Claims (3)

An air lance for cleaning an air conditioning duct that removes dirt by hitting the inner surface of the air conditioning duct by a movement when discharging compressed air from the tip,
It consists of a tubular lance body whose rear end communicates with a compressed air supply source, and a tip hose attached to the tip of the lance body,
An air lance for cleaning an air conditioning duct, wherein the tip hose has a shape divided into a plurality of tip pieces by forming a plurality of cuts in a length direction from a position in the middle of the length of the tip hose to a tip edge. A method of cleaning an air conditioning duct in a vehicle that removes dirt on the inner surface of the air conditioning duct installed in the vehicle,
It is a method of using an air lance consisting of a lance body and a tip hose attached to the tip of the lance body,
The tip end hose of the air lance has a shape divided into a plurality of tip pieces by forming a plurality of cuts in the length direction from the midway position of the tip hose to the tip edge,
The rear end of the air lance communicates with a compressed air supply source, and the air lance enters the air conditioning duct through the opening originally formed so that the tip hose is positioned in the air conditioning duct and the compressed air is supplied in this state. With the tip of the tip hose, the inner surface of the air conditioning duct is struck to remove the dirt attached to the inner surface.
Then, the cleaning method of the air-conditioning duct in a vehicle characterized by collecting the removed dirt with a dust collector. 3. The method for cleaning an air conditioning duct in a vehicle according to claim 2, wherein the vehicle is a railway vehicle or an airplane.

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