JPH0533158Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a device for spraying a fixed amount of disinfectant.

[Conventional technology]

FIG. 2 shows an example of a conventional disinfectant spraying device.

(1) Structure 101 is a sterilant tank which is pressurized by air filtered through a filter 115 via a tank pressurization valve 116 and a tank pressurization pipe 118.

The sterilizer in the sterilizer source tank 104 is supplied to the sterilizer tank 101 by a supply pump 105 through a check valve 106, a sterilizer supply valve 107, and a sterilizer supply pipe 108. While the sterilizer is being supplied, the sterilizer tank is opened to the atmosphere by the tank atmosphere release valve 117.

The level controller 103 is the disinfectant tank 10
The disinfectant is controlled to be supplied to a predetermined liquid level.

Reference numeral 110 denotes a spray nozzle that atomizes the disinfectant supplied through the disinfectant distribution pipe 114. The disinfectant is supplied to the spray nozzle through the spray valve 111. The atomizing air that sprays the disinfectant is connected to the atomizing air pipe 1.
13, the spray nozzle 11 through the spray air valve 112
0.

(2) Action The sterilizer is supplied from the sterilizer source tank 104 to the sterilizer tank 101 via the check valve 106, the sterilizer supply valve 107, and the sterilizer supply pipe 108 by the supply pump 105 to the level controller 103.
The liquid is supplied to the liquid level determined by . While the disinfectant is being supplied, the tank atmosphere release valve 117 is opened to maintain the disinfectant tank 101 at atmospheric pressure.

The disinfectant is supplied to one or more spray nozzles 110 attached to the disinfectant distribution pipe 114, as necessary, by opening the tank pressure valve 116 and closing the tank atmosphere release valve 117. This is done by applying pressure to 101. When the pressure in the disinfectant tank 101 exceeds a predetermined pressure, the safety valve 102 operates to adjust the pressure in the disinfectant tank 101 to a predetermined pressure.

Spraying of the disinfectant from the individual spray nozzles 110 is performed by turning on and off the spray valves 111 and spray air valves 112 attached to the respective spray nozzles 110 at the timing shown in FIG.

Turn on the spray air valve 112 and turn on the spray valve 111.
The reason why the spray air valve 112 is turned off earlier than the spray valve 111 is turned off is to apply sufficient pressure to the spray valve 111 before spraying to prevent dripping, and the spray air valve 112 is turned off later than the spray valve 111 is turned off. This is to spray the liquid inside the valve 111 without leaving it behind.

The spray amount of the disinfectant is determined by the opening time of the spray valve 111 and the spray air valve 112, or the disinfectant tank 1.
01 level change amount by level controller 10
3 to detect and control the decision.

[Problem that the invention aims to solve]

The conventional techniques described above have the following problems.

(1) Even after spraying the disinfectant, the disinfectant remains in the disinfectant distribution pipe 11.
4 remains full, so the spray valve 1
11 fails and opens, or the spray valve 1
11 malfunctions and the spray valve 111 remains open, the disinfectant is transferred to the spray nozzle 11.
Leaks from 0.

(2) Since the sterilizer distribution pipe 114 is always connected to the sterilizer tank 101, if the spray valve 111 is broken or the control device for the spray valve 111 is broken and the spray valve 111 is opened, the sterilization will be stopped. Disinfectant in the agent tank leaks from spray nozzle 110 through disinfectant distribution pipe 114 .

(3) Disinfectant supply pipe 108 and disinfectant distribution pipe 114
When spraying the disinfectant, if the disinfectant distribution pipe 114 is empty or there is an air pocket, the disinfectant distribution pipe 114
The amount of disinfectant and time required to fill the inside with disinfectant is unknown, and the exact amount of disinfectant to be sprayed is not known.

[Means to solve the problem]

(1) In order not to supply more than a certain amount of disinfectant to the spray nozzle, install a siphon pipe and a disinfectant supply pipe connected to the siphon pipe in the disinfectant tank.

(2) In order to recover the sterilizer in the sterilizer supply pipe (sterilizer distribution pipe) to the sterilizer tank, the sterilizer supply valve secondary side of the sterilizer supply pipe (sterilizer distribution pipe) and the pressurized air source A disinfectant recovery valve, check valve, and disinfectant recovery air piping are installed between the

(3) In order to push out the air in the disinfectant distribution pipe from the disinfectant tank to the spray nozzle and fill it with disinfectant, install the disinfectant supply pipe from the disinfectant source tank to the disinfectant tank, and from the disinfectant tank to the spray nozzle. Also serves as a disinfectant distribution pipe.

[Effect]

(1) The siphon tube attached to the sterilizer tank will not supply more sterilizer to the spray nozzle than the amount determined by the tank liquid level and the lower surface of the siphon tube at the start of spraying.

(2) Since the sterilizer in the sterilizer supply pipe is recovered to the sterilizer tank by the air supplied from the sterilizer recovery valve and the sterilizer recovery air piping, the sterilizer will not be removed even if the spray nozzle or spray valve malfunctions. will not leak.

(3) By supplying the sterilizer from the sterilizer source tank to the sterilizer tank via the sterilizer supply piping,
Since the disinfectant distribution pipe is also used as the disinfectant supply pipe, the air in the disinfectant distribution pipe from the disinfectant tank to the spray nozzle can be pushed out.

〔Example〕

In FIG. 1, 1 is a disinfectant tank, 2 is a siphon pipe, 3 is a safety valve, 4 is a level controller, 5 is a disinfectant source tank, 6 is a supply pump, 7 is a check valve, 8 is a disinfectant supply valve, 10 is a spray nozzle;
11 is a spray valve, 12 is a spray air valve, 13 is a spray air pipe, 14 is a disinfectant supply pipe, 15 is a filter, 16 is a tank pressure valve, 17 is a tank atmosphere release valve, 18 is a tank pressure pipe, 19 is a Pressure gauge, 20
21 is a sterilizer recovery valve, 21 is a check valve, and 23 is a sterilizer recovery air pipe.

The siphon tube 2 is installed with a predetermined liquid level difference H with respect to the disinfectant supply level of the disinfectant tank 1.

One or more spray nozzles 10 are attached to a disinfectant supply pipe 14 from the disinfectant source tank 5 to the disinfectant tank 1 via a spray valve 11.

Furthermore, a sterilizer recovery air pipe 23 is connected to the secondary side of the sterilizer supply valve 8 attached to the sterilizer supply pipe 14 for recovering the sterilizer in the sterilizer supply pipe 14 to the sterilizer tank 1. be done.

A check valve 21 for preventing backflow of the sterilizer and a sterilizer recovery valve 20 for turning on and off the recovery air are attached to the sterilizer recovery air piping 23.

Next, the operation of this device will be explained.

The sterilizer is supplied from the sterilizer source tank 5 to the supply pump 6
The sterilizer is supplied to the sterilizer tank 1 through the siphon pipe 2 and the sterilizer supply pipe 14 to which the check valve 7, the sterilizer supply valve 8, and the spray nozzle 10 are connected. At this time, the air inside the disinfectant supply pipe 14 is
The disinfectant is pushed into the disinfectant tank 1 and released into the atmosphere through the tank pressurizing pipe 18 and the tank atmosphere release valve 17, and the disinfectant supply pipe 14 is filled with the disinfectant.

The amount of disinfectant supplied to the disinfectant tank 1 is controlled by a level controller 4 attached to the disinfectant tank 1, and the volume between the disinfectant supply level and the lower surface level of the siphon tube 2 (in FIG. (expressed as the product of the level difference H and the cross-sectional area A of the disinfectant tank) is determined to be equal to a specified amount of disinfectant sprayed from the spray nozzle 10 in a predetermined process or a predetermined time.

When the disinfectant supply level is reached, the disinfectant supply is stopped.

When a sterilizer is sprayed from the spray nozzle 10, the sterilizer tank 1 is filled with air that has been adjusted to a predetermined pressure by a pressure regulator (not shown) to filter the filter 15, tank pressure valve 16, and tank pressure piping 18.
is pressurized to a predetermined pressure.

The sterilizer in the sterilizer tank 1 is supplied to the spray nozzle 10 through the siphon tube 2, the sterilizer supply pipe 14, and the spray valve 11 due to the pressure applied to the sterilizer tank 1, and then is supplied to the spray nozzle 10 through the atomizer air pipe 13 and the spray valve 11. It is atomized together with atomizing air supplied through the air valve 12. The timing of spraying is the third
As shown in the figure, this is the same as the conventional example. When the disinfectant is sprayed and the disinfectant liquid level in the disinfectant tank 1 reaches the lower end of the siphon tube 2 and air enters the siphon tube, the supply of disinfectant to the spray nozzle 10 is automatically stopped due to the siphon effect. do.

After the disinfectant spraying is completed, the tank pressurizing valve 16 is closed and the tank atmosphere release valve 17 is opened to open the disinfectant tank 1 to the atmosphere.

After the disinfectant spraying is completed, the disinfectant recovery valve 20 is opened, and a pressure regulator (not shown) sends air at a predetermined pressure from the disinfectant recovery air piping 23 to the disinfectant supply piping 14. The disinfectant inside is collected into the disinfectant tank 1.

In addition, in the above embodiment, the disinfectant tank 1
When supplying the disinfectant from the spray nozzle 10 to the spray nozzle 10,
It is also possible to supply the sterilizer by opening the sterilizer tank 1 to the atmosphere and using the siphon effect of the siphon tube 2 and the sterilizer supply pipe 14.

[Effect of idea]

In a disinfectant spraying device that uses a disinfectant tank pressurized by a pressurized air source as a head tank and sprays disinfectant with a nozzle attached from the disinfectant tank via piping, the disinfectant is sprayed from the top of the disinfectant tank into the liquid level of the tank. A siphon pipe for supplying a fixed amount is arranged toward the sterilizer, and a sterilizer supply pipe is directly connected to the siphon pipe and has a spray nozzle installed in the middle thereof, and the sterilizer supply pipe is arranged on the sterilizer supply source side of the sterilizer supply pipe. By providing a sterilizer recovery air pipe, a sterilizer recovery valve, and a check valve between the secondary side of the sterilizer supply valve and the pressurized air source, the following effects are produced.

(1) By installing a siphon pipe in the disinfectant tank so that only a predetermined amount of disinfectant is supplied from the capacity at the disinfectant supply level to the spray nozzle, the predetermined amount can be The equipment and
Since no disinfectant remains on the product, the safety of the disinfectant spray device is improved.

(2) By using both the supply piping to the disinfectant tank and the distribution piping from the tank to the spray nozzle,
Air pockets in the disinfectant distribution pipe can be removed, and level changes in the disinfectant tank and spray time (time the spray valve and spray air valve are open) can be eliminated.
By controlling this, the amount of disinfectant sprayed can be measured more accurately, allowing for more reliable sterilization operations.

(3) After the disinfectant is sprayed, the disinfectant in the disinfectant supply pipe is collected into the disinfectant tank using the disinfectant recovery air pipe connected to the disinfectant supply pipe, and the disinfectant supply pipe is emptied. It is possible to prevent disinfectant from leaking from the spray nozzle in the event of malfunction of the spray nozzle, eliminating contamination or residual disinfectant in equipment and products.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a disinfectant spraying device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of a conventional device, and FIG. 3 is an explanatory diagram of spray timing by the present invention and the conventional device. 1... Disinfectant tank, 2... Siphon tube, 5
... Disinfectant source tank, 6... Supply pump, 10...
... Spray nozzle, 11 ... Spray valve, 14 ... Disinfectant supply pipe, 20 ... Disinfectant recovery valve, 21 ... Check valve, 23 ... Disinfectant recovery air pipe.

Claims (1)

[Scope of utility model registration request] In a disinfectant spraying device that uses a disinfectant tank pressurized by a pressurized air source as a head tank and sprays disinfectant with a nozzle attached from the disinfectant tank via piping, the disinfectant is sprayed from the top of the disinfectant tank into the liquid level of the tank. A siphon pipe for supplying a fixed amount is arranged toward the sterilizer, and a sterilizer supply pipe is directly connected to the siphon pipe and has a spray nozzle installed in the middle thereof, and the sterilizer supply pipe is arranged on the sterilizer supply source side of the sterilizer supply pipe. A disinfectant spraying device characterized in that a disinfectant recovery air pipe, a disinfectant recovery valve, and a check valve are provided between the secondary side of the disinfectant supply valve and the pressurized air source.