KR101528842B1

KR101528842B1 - Formgun of self car wash equipment

Info

Publication number: KR101528842B1
Application number: KR1020140051479A
Authority: KR
Inventors: 안상목; 이상준
Original assignee: 안상목
Priority date: 2014-04-29
Filing date: 2014-04-29
Publication date: 2015-06-17

Abstract

The present invention relates to a foam gun for a self-car wash. A plurality of foam gun is controlled by using a central concentration type-method under a control of a central integration control system. When using a foam gun tool of an active work part or other lower level parts, a rotating boom stand is installed in a ceiling of each car washing booth for a self-car wash, thereby increasing convenience and ease during work. As the number of washing booths is increased, facility costs may remarkably be reduced, and freezing and bursting may be prevented by economic costs. More specifically, a line supplying form forms a central concentration type-supplying part. A plurality of the pipes from a first pipe to an n^th pipe connected with the central concentration type-supplying part are connected with the hoses from a first hose to the n^th hose respectively, which have each shape of a coil with an elastic force through a rotating boom stand from a first rotating boom stand to an n^th rotating boom stand which are installed in the ceilings of the car washing booths from a first car washing booth to the n^th car washing booth respectively. The hoses from a first hose to an n^th hose are connected with the foam guns from a first foam gun to the n^th foam gun respectively. Also, gun holders from a first gun holder to an n^th gun holder, by which the foam guns from the first foam gun to the n^th foam gun are held, are connected with the central concentration type-supplying parts. Therefore, at a temperature not more than a freezing temperature during winter, a freezing and bursting preventing part, which includes a circulated water feedback system recycling freezing and bursting preventing water discharged from the foam guns from the first foam gun to the n^th foam gun, is operated; thereby remarkably reducing maintenance costs during the winter. In a case where a plurality of car washing booths are operated, it is necessary to install each separate foam gun device of each car washing booth. However, in accordance to the present invention, each foam gun device is connected with the central concentration type-supply part such that one integration control system is formed and operated, thereby remarkably reducing facility costs.

Description

[0001] The present invention relates to a self-

The present invention relates to a self-car washer type foam machine, in particular, a foam box installed in several car wash booths is controlled in a centralized manner, and a rotary boom arm is installed at the upper part of a car wash car wash booth (car wash booth) And a self-cleaning car washer which can prevent icing and freezing even in the winter,

Generally, among the facilities for car washing, automatic car wash machines used in petrol stations have an advantage of automatic washing in a short time, but due to their mechanical and structural characteristics, it is difficult to wash even the detailed parts of the vehicle, Since the detergent water and the washing water are simultaneously poured out from the body of the vehicle soiled with friction force and foreign matter, the scratches (residuals) on the surface of the vehicle paint are rubbed by the high-speed rotary brush in the muddy water, Owners tend to wash their hands or use self-washing cars widely.

Such a self-washing facility structure includes a booth structure in which pillars erected at a predetermined interval and a wall partitioning the pillars are installed, and a horizontal beam is built on the top of the booth structure to provide a pair of left and right rotating boom bars. The rotating boom is equipped with a circulation water supply line for spraying the washing water and the other rotary boom on the opposite side is equipped with a foam water circulation water supply line for supplying detergent foam, The wife is made up of popular nose.

That is, until now, the self-car washer can pay the service charge through the nose popular as the work command part and select the operation button provided thereon, so that the vehicle can be washed using the fountain case or the foam sole tool Wastewater generated in the process is transferred to a separate wastewater treatment device through a drainage line installed on the floor and processed.

In this case, the washing water is supplied through the washing water supply pipe connected to the separate washing water supply device, and the washing water is sprayed to the high pressure when using the washing water to wash and remove the foreign substances or soil sand, and the foam sole is connected with a separate foam supplying device It is a task to be able to clean the vehicle using bubble stalks by receiving detergent water in bubble form through the bubble supply pipe.

In addition, a self-washing foam foaming apparatus according to the related art includes a water pump for pouring a predetermined quantity of wash water and a washing detergent from a water tank for storing car wash water and a detergent tank for storing car wash detergent, respectively; A temperature sensor for sensing the temperature of the washing water and the washing detergent in the water tank and the detergent tank; A heater for heating the water and the detergent in the water tank and the detergent tank to a predetermined temperature when the temperature of the water tank and the detergent tank detected by the temperature sensor is lower than a predetermined reference value; An air compressor for generating compressed air; A foam generator for generating a foam by mixing the car wash water supplied by the air pump and the air compressor with the car wash detergent and the air, the foam generator being connected between the supply pump and the foam generator and between the air compressor and the foam generator, First and second valves for discharging and blocking detergent and air; A nozzle for spraying bubbles generated in the foam generator; A controller for recognizing the user's electronic money card to settle the predetermined usage fee and to control the operations of the supply pump and the air compressor and the opening and closing operations of the first and second valves for a predetermined time; And a proximity sensor provided in front of the controller and outputting a signal to maintain the closed state of the first and second valves when the user is sensed as being close to the user's position; .

However, such a system structure as described above requires a space for accommodating such a " housing constituting the self-washing foam foaming device " in a certain place exposed to the outside, and a closed frame of a door- There is a problem that various kinds of components such as a water tank and a supply pump, a detergent tank for a car wash detergent, a supply pump, a temperature sensor and a heater must be separately provided from a1 to aN as many as the number of the enclosed frame.

In addition, in the weather of freezing in winter, the inside of the enclosure maintains the room temperature by heating the heater by the temperature sensor. However, the activity area from the hose in the form of a duct connected to the outside of the enclosure, If you do not use the water for a long period of time, the pipes and nozzles of the active sites exposed by residual water and detergent can not avoid freezing, so you have to follow the inconvenience that you have to use it for melting next time.

In addition, when the hose is twisted or folded, the hose can be twisted or collapsed by the use of the hose being dragged on the floor due to the nature of the work that the user needs to use while rotating the vehicle around the vehicle when using the foam foaming machine. When the hose is crushed in contact with the vehicle, Facing an environment where workability and satisfaction are not very high.

Thus, the present invention shares the interior of a self-washing carousel; Even if a single centralized management unit a1 manages a plurality of work sites simultaneously, it is possible to completely extinguish this work. In other words, The system is always ready to work at any time without freezing or freezing. In addition, a separate rotary boom is installed above the structure to improve user's workability and satisfaction.

1. Patent Application No. 10-2012-0037477 (self-washing foam foaming device) 2. Patent Application No. 10-2012-0026779 (Self-car washing booth)

Accordingly, the present invention has been made in view of the above-mentioned problems of the prior art, and it is an object of the present invention to provide a self-contained foam container which is capable of reducing the facility cost by using a center pipe dispensing method and preventing freezing or freezing It is an object of the present invention to provide a foam-type device for car washing.

Another object of the present invention is to prevent a car wash floor from contacting with a car when using a foam boom with a swing boom mounted on a ceiling of a car wash booth.

Another object of the present invention is to prevent a situation in which water is circulated when a foam is not used in a winter season in which temperature is low, so that a pipe or a hose can not be frozen or frozen to perform a foam operation.

Another object of the present invention is to enable water to be continuously recycled and circulated after the water is fed back to the storage tank without discarding the water when the water is circulated in order to prevent freezing or freezing of the foam gun.

It is a further object of the present invention to simplify the installation by using the nostalgic nostrils for car wash per wash booth without using separate nose nostrils for the foam operation only, So that no additional costs arise.

According to an aspect of the present invention, there is provided a system for supplying a foam, comprising: a centralized supply unit for supplying a foam by mixing detergent water and high-pressure air; and a plurality of first to n-th ducts connected to the centralized supply unit, Wherein the first to nth ducts are installed through a ceiling frame of the car wash booth to the nth car wash booth, And the first hose to the n-th hose are connected to the first to n-th foam nose, respectively, and the first to n-th foam noses are connected to the first to n-th horns, respectively, It is composed of frost prevention part that continuously feeds the circulation water for prevention of frost which is discharged from the 1st form to nth foam form in the cold weather in the winter without the work, And the centralized supply portion Wherein the foam conduit is disposed in parallel with the circulating water conduit at the inlet side of the first main solenoid valve to the nth main solenoid valve and the first conduit is connected to the outlet conduit through the first conduit, Wherein the centralized supply unit is configured to operate when the foam gun button is operated from the first nose popular to the nth popular installed in the first car wash booth to the nth car wash booth. In the foam-type device, the freezing prevention unit connects the first to the n-th key stand and the underground water tank buried in the underground to the first to n th collection pipes, and the underground water tank is connected to the circulation pump of the centralized supply unit, And a circulation water line connected to the circulation pump is connected to the first main solenoid valve to the nth main solenoid valve, The third solenoid valve that is kept closed is opened and the circulation pump is operated to circulate the circulating water contained in the groundwater tank, which maintains the room temperature by the geothermal heat, through the circulation water line to the first main solenoid valve to the nth The circulation water flows into the groundwater tank through the first to nth hoses, the first to nth forms, and the first to nth collection pipes through the first to nth conduits via the main solenoid valve. And repeatedly circulating the pipeline, the hose, and the foam gun freezing or freezing in the winter season.

As described above, according to the present invention, the operation of the foam gun installed in a plurality of car wash booths is applied as a centralized distribution system, thereby reducing the facility cost. When the foam tank is not used during the winter, The water is circulated to prevent frost and prevent frost, thereby reducing the management cost, and there is no need of further defrosting of the defrosting device or additional defrosting operation of the defrosting area.

In addition, the present invention utilizes a pongeun as a rotating boom bar installed on the ceiling of a car wash booth so that the working environment of the user is very easy and convenient, and a part of the equipment, in particular, the pipe- It is effective.

In addition, the present invention provides a method for re-circulating water in an underground storage tank so as to prevent water from being discarded when water is circulated in order to prevent freezing or freezing of the foam gun, It is effective.

In addition, the present invention avoids the complexity of the facility by using the pre-installed nose for car wash for each washing booth without using a separate nose for the foam-only operation, There is an effect that the opportunity cost to be borne by the user can be reduced.

FIG. 1 is a perspective view showing a self-washing carousel according to the present invention,
FIG. 2 is a front view showing a self-washing carousel of the present invention,
FIG. 3 is a view showing a self-car washer-type foam-type device according to the present invention,
4 is a front view showing a self-washing car according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

As shown in FIGS. 1 to 4, the self-car washes of the present invention can be used individually in a plurality of positions by the integrated control of the centralized supply part 10, and in the winter, A foam-type apparatus 100 for preventing a frost wave is formed.

The centralized supply unit 10 may be regarded as a building type structure capable of blocking the outside air, and the temperature of the image is always maintained by the electric heater or the floor heating which can keep the inside at normal temperature so that the water does not freeze in the freezing weather in winter And the foam-type device 100 is regarded as a comprehensive environment including all of them.

2, the foam-type apparatus 100 includes a centralized supply unit 10 for supplying a detergent water and high-pressure air to a foamed tubular duct, that is, a combination of a foam duct 11 and a frost preventing unit 80, .

Here, the detergent water is supplied to a detergent water tank (13) using the Bernoulli principle. The water is supplied to a separate water pump and a detergent is mixed at a suitable ratio to adjust the concentration. The level adjustment of the detergent water tank associated with the pump is constituted by a system which is interrupted by an electromechanical device, and this detergent water is transferred to the foam duct 11 by the operation of the detergent water pump 14 in accordance with the nose- .

3 and 4, the foam conduit 11 is composed of a detergent water pipe 14a connected to the detergent water pump 14 and an air conduit 15a connected to the compressor 15, A first solenoid valve 14b and a second solenoid valve 15b for opening and closing the first and second solenoid valves 14a and 15a are provided in the first and second ducts 14a and 15a, A first check valve 11a and a second check valve 15c for blocking the backwash of the detergent water and the air are installed, respectively.

The first main solenoid valve 12a to the nth main solenoid valve 12n which finally intermittently commands the formant apparatus 100 system are connected to the foam pipeline 11 and the freezing prevention circulating water pipe line 85 It is designed and installed so that it does not interfere with performing the foam-type work at all times under any temperature condition in conjunction with the mechanical connection.

One of the first main solenoid valve 12a to the nth main solenoid valve 12n has one outlet at the outlet and two at the other, The pipeline is made up of a frost protection circulation water line 85 provided with a third solenoid valve 85b which is commanded by a temperature sensor.

At this time, the third solenoid valve 85b is connected to the outlet side channel of the circulation pump 83 toward the inlet side, and the third check valve 85c for preventing the reverse flow is connected to the outlet side of the third solenoid valve 85b. As shown in FIG.

On the outlet side of the foam pipeline 11 and the circulating water pipe 85, there are provided a foam outlet valve 91 and a circular outlet valve 92 having a plurality of outlets respectively corresponding to the number of foam- And connected to the first main solenoid valve 12a through the nth main solenoid valve 12n via the foam conduit 11 and the circulating water path 85 respectively extended and connected to be redistributed respectively.

That is, the foam outlet port valve 91 and the circular water outlet port valve 92 are respectively connected to the foam pipeline 11 and the circulating water path 85 itself or the first main solenoid valve 12a to the nth main solenoid valve 12n are respectively a1 to aN.

The detergent water conduit 14a and the air conduit 15a are connected to the foam conduit 11 by the reverse flow preventive first check valve 11a and the second check valve 15c, It is a structure that is not interfered.

The foam ducts out of the centralized supply part 10 which are the outlets of the first main solenoid valve 12a to the nth main solenoid valve 12n, namely the first duct 20a to the nth duct 20n, And the first car wash booth 30a to the nth car wash booth 30n in a state exposed to the first car wash booth 30a.

The first through third ducts 20a through 20n are connected to the foam rotating boom rods such as a bracket 40a through an n rotatable boom rope 40n, The freezing and spreading of the frost and the freeze wave of the first pipeline 20a to the nth pipeline 20n are reduced when the frost preventing circulation pump 83 fails to the site of the frost damage 41a to 41n, The heating line 21 connected to the temperature sensor is disposed in parallel with the first conduit 20a to the nth conduit 20n so as to be wrapped with a torn or the like which is a thermal insulation material for the purpose of less heating, The power supply to the power supply unit 21 is controlled by the centralized supply unit 10.

The first to third ducts 20a to 20n are connected to the first rotating boom rods 40a to 40n provided on the ceiling of the first car wash booth 30a to the nth car wash booth 30n, and are connected to the first hose 50a to the n-th hose 50n having elasticity via the lake channel embedded in the rotating boom table 40n.

The first rotary boom 40a to the n th boom 40n are connected to the brackets 41a to 41n connected to the ceiling frame 33 of the first car wash booth 30a to the nth car wash booth 30n, And the first hose 50a to the nth hose 50n are connected to the boom frame 42. In this case,

The first hose 50a to the n-th hose 50n are connected to the first to sixth n-th forms 60a to 60n, respectively, by a coil-shaped hose having elasticity and flexibility.

The first to nth key holders 70a to 70n and the first to fourth collection pipes 82a to 82n to which the first to n-th forms 60a to 60n are mounted, Is connected to the underground water tank 81, and a pipe for continuously circulating the circulating water is formed at a temperature below the freezing point of winter to constitute a freezing prevention unit 80 under the control of the centralized supply unit 10.

The nondestructive wave preventing unit 80 includes first to third key holders 70a to n and a groundwater tank 81 buried in the ground to the first collection channel 82a to the nth collection channel 82n And the groundwater tank 81 is connected to the circulation pump 83 of the centralized supply unit 10 and the circulation water supply pipe 84.

When the circulating water circulates at a subzero temperature in the winter, the first to sixth casts 60a to 60n in the first to n-th stage 70a to the n-th stage 70n are moved A water pressure switch 81a is installed at the top of the underground water tank 81 so as to supplement the lost water circulating in the waste water treatment plant.

The circulating water pumped by the circulation pump 83 through the circulation water supply pipe 84 from the groundwater tank 81 flows through the circulation water pipe 85 and the circulation water discharge valve 92 to the first main solenoid The third solenoid valve 85b which is opened and closed by the temperature sensing sensor and the reverse flow preventing flow of the foam dry detergent into the circulating water path 85. The third solenoid valve 85b is connected to the circulating water path 85 through the valve 12a through the nth main solenoid valve 12n, And a third check valve 85c for prevention.

In addition, when the temperature of the freezing prevention unit 80 is lowered below the set temperature by using the temperature sensor 85a exposed to the outside of the building to detect the temperature of the subzero, the third solenoid valve 85a associated with the temperature sensor 85a, The circulation pump 85b and the circulation pump 83 are operated to circulate the circulating water of the groundwater tank 81 to the circulation water pipe 85 and the first channel connected to the first main solenoid valve 12a to the nth main solenoid valve 12n The first collection pipe 20a to the nth pipeline 20n, the first hose 50a to the nth hose 50n, the first foamed structure 60a to the n-th foamed structure 60n, the first collection channel 82a, And the pipe, hose and foam gun are circulated in the winter without icing or freezing by the feedback of the circulating water flowing into the groundwater tank 81 through the channel 82n.

At this time, when the specific form work is performed, the specified line of the first main solenoid valve 12a to the nth main solenoid valve 12n is activated, so that the circulation number feedback system of the specified line Respectively.

That is, the first main solenoid valve 12a to the nth main solenoid valve 12n are connected to the foam duct 11 and the circulating water pipe 85 and serve as an inlet through which the foam detergent and the circulating water are introduced respectively And the first pipeline 20a to the nth pipeline 20n are connected to the other side of the first main solenoid valve 12a through the nth main solenoid valve 12n to selectively discharge the foam detergent and the circulating water. Function.

That is, two pipes are connected to the inlet side of the first main solenoid valve 12a to the nth main solenoid valve 12n, that is, the foam pipe 11 and the circulating water pipe 85 The foam conduit 11 and the circulating water conduit 85 are commands that can not be compatible with each other at the time of executing the command, that is, the foam-like operation, not the circular hand operation, as a priority command. The first main passage 20a to the nth main passage 22n are formed at the outlet side of the first main solenoid valve 12a to the nth main solenoid valve 12n.

The operation and effect of the present invention constructed as described above will be described below.

1 to 4, in order to use the form -work apparatus 100, the centralized supply unit 10 and the first car wash booth 30a to the nth car wash booth 30n, for example, The use of the first nose pad 31a, the first channel 20a, the first rotating boom 40a, the first hose 50a, the first foam foot 60a, As an example.

First, the car is placed in the first car wash booth 30a and the amount necessary for washing is inputted to the first nose popular 31a.

Thereafter, the first nose popular 31a may be used to perform an operation required for washing or a form washing. In the present invention, a case of performing a form washing will be described.

At this time, in order to perform the form washing, the form-button button 32 for operating the first form-fork 60a is selectively operated in the first nose popular 31a.

Thereafter, the centralized supply unit 10 transfers the detergent water contained in the detergent water tank 13 through the detergent water pipe 14a by the operation of the detergent water pump 14, and at the same time, Is fed through the air conduit 15a and flows through the foam conduit 11 in the form of a mixture of detergent water and air.

Here, the detergent water is supplied to the first main solenoid valve 12a after the operation of the first solenoid valve 14b and the air are transferred along the foam duct 11 by the operation of the second solenoid valve 15b, And moves along the first channel 20a.

At this time, when the first main solenoid valve 12a is operated, the circulation water is circulated by the circulation pump 83 of the winter season freeze preventing unit 80 to the circulation water pipe 85 through the circulation water discharge valve 92, And reaches the outlet side of the main solenoid valve 12a, but the passage which is the circulation water passage is blocked (the passage which is the foam detergent water passage is open), and the passage to the first pipe 20a is blocked. That is, the foam-type work line is activated and the circulation water line is kept closed.

In addition, the foam moved along the first duct 20a is transferred to the first hose 50a through the first rotating boom 40a, and foam is sprayed through the first foam door 60a to be applied to the vehicle will be.

Generally speaking, if a random selection of the first nose popular (31a) to the nth popular (60n) is performed, a randomly selected form-work operation line is operated, that is, the first main solenoid valve The first solenoid valve 12n to the first rotating float 40a to the nth rotating swath 40n to the first hose 50a to the nth hose 50n (60n).

In the winter season when no work is performed, the first pipeline 20a to the nth pipeline 20n provided in the first car wash booth 30a to the nth car wash booth 30n are respectively installed in the first rotary boom 30a, Moisture existing in the first to n-th floors 40a to 40n, the first hose 50a to the nth hose 50n, and the first to eighth forms 60a to 60n is frozen or frozen The freezing prevention unit 80 is operated so as not to cause a problem of being frozen.

That is, when the temperature falls below the detection temperature in the temperature sensor 85a associated with the third solenoid valve 85b installed in the circulation water line 85 of the freezing prevention unit 80, The circulating water contained in the groundwater tank 81 flows into the circulating water supply line 84-> the circulation pump 83-> the third solenoid valve 85b -> the third solenoid valve 85b as the solenoid valve 85b is opened and the circulation pump 83 operates. Through the first main solenoid valve 12a to the nth main solenoid valve 12n through the circulating water path 85-> the third check valve 85c-> the circulating moisture volatilization valve 92, The first pipeline 20a to the nth pipeline 20n laid side by side together with the hot wire 21 installed on the ceiling of the first car wash booth 30a to the nth car wash booth 30n, To the n th rotating boom table 40n to the first hose 50a to the nth hose 50n to the first to eighth forms 60a to 60n.

At this time, the circulating water discharged from the first to n-th forms 60a to 60n is re-collected in the underground water tank 81 through the first collection channel 82a to the nth collection channel 82n, To prevent freezing and freezing due to the transfer of water through a circulation process using a feedback system that prevents waste of the water.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.

10: Centralized supply part 11: Foam duct
11a: first check valve
12a to 12n: first main solenoid valve to nth main solenoid valve
13: Detergent water tank 14: Detergent water pump
14a: detergent tube 14b: first solenoid valve
15: compressor 15a: air duct
15b: second solenoid valve 15c: second check valve
20a to 20n: first pipe to nth pipe 21: hot wire
30a to 30n: First car wash booth to nth car wash booth
31a ~ 31n: popularity of first nose ~ n nose popular 32:
33: ceiling frames 40a to 40n: first rotating boom to nth rotating boom
41a to 41n: Rotating boom bracket 42: Boom bar
50a to 50n: first hose to n-th hose 60a to 60n: first to nth foam guns
70a ~ 70n: 1st case cradle ~ nth case cradle
80: Freezing prevention part 81: Ground water tank
81a: Water pressure switch
82a to 82n: first collection pipe to nth collection pipe 83: circulation pump
84: Circulating water supply line 85: Circulating water line
85a: Temperature sensor 85b: Third solenoid valve
85c: third check valve 91:
92: Circulating moisture volatility valve 100:

Claims

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A centralized supply portion 10 for supplying the foam by mixing detergent water and high-pressure air is formed,
A plurality of first pipelines 20a to n are connected to the centralized supply unit 10 through the ceiling frame 33 of the first car wash booth 30a to the nth car wash booth 30n, Installed,
The first duct 20a to the nth duct 20n are connected to the first rotating boom 40a to the nth rotating boom 40n provided on the ceiling of the first car wash booth 30a to nth car wash booth 30n, (50a) to n-th hose (50n) having an elastic force through a built-in hose, respectively,
The first hose 50a to the n-th hose 50n are connected to the first to sixth n-th forms 60a to 60n, respectively,
The first to n-th stage 70a to the n-th stage 70n to which the first to n-th forms 60a to 60n are mounted and the centralized supply unit 10 are connected to each other, Wave preventing unit 80 that continuously feeds back the circulation water for preventing the freeze-thaw from the first to sixth formulations 60a to 60n,
The centralized supply part 10 is formed with a foam conduit 11 for transferring foam mixed with detergent water and high-pressure air,
The foam conduit 11 is disposed in parallel with the circulating water path 85 at the inlet side of the first main solenoid valve 12a to the nth main solenoid valve 12n and is connected to the outlet side of the first conduit 20a to the nth And a channel 20n,
The centralized supply unit 10 operates the foam gun button 32 in the first nose popular 31a to the nth nose popular 31n installed in the first car wash booth 30a to the nth car wash booth 30n Wherein the self-cleaning device is configured to operate the self-
The nondestructive wave preventing unit 80 includes first to nth key holder 70a to nth key holder 70n and a groundwater tank 81 to be buried in the ground to the first collection channel 82a to the nth collection channel 82n &Lt; / RTI &
The groundwater tank 81 is connected to the circulation pump 83 of the centralized supply unit 10 and the circulation water supply pipe 84,
A circulating water line 85 connected to the circulation pump 83 is connected to the first main solenoid valve 12a through the nth main solenoid valve 12n,
The third solenoid valve 85b which is kept closed when the temperature drops below the sensed temperature set value in the temperature sensor 85a is opened and the circulation pump 83 is operated to cool the freeze prevention unit 80 to the room temperature The circulation water contained in the groundwater tank 81 holding the circulation water is supplied to the first channel 20a through the first main solenoid valve 12a through the nth main solenoid valve 12n through the circulation water path 85, The first hose 50a through the n th hose 50n, the first foamed structure 60a through the nth foamed structure 60n, the first collection conduit 82a through the nth collection conduit 82n are connected to each other through the conduit 20n. To the groundwater tank (81), and then the pipe, hose and foam gun are circulated in a freezing or freezing state in winter.

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5. The method of claim 4,
The first conduit 20a to the nth conduit 20n are connected with the temperature sensor 85a in order to avoid freezing of the conduit or diffusion and spreading of the conduit during the failure or inspection of the circulation pump 83 during the winter season, ) Is installed in close proximity to the pipeline.