JPH05329408A - Liquid spraying device - Google Patents

Abstract

PURPOSE:To provide a liquid spraying device by which the priming is properly operated at the time of an initial running. CONSTITUTION:A returning pipe is disposed from the pump outlet side of a liquid feeding pump of a two-liquid spray type liquid spraying device to a 1st tank. A stop valve 11 is interposed in a returning pipe. At the same time, this device is provided with a priming storing means 20 for storing the past priming operation, a priming means for operating a pump 3 only for the specified time to open the stop valve 11 when no memory of the priming operation is present in the priming storing means 20, a heater energizing means for starting the energizing of a heater 4f based on the on-operation of an operating switch 13 when the memory of the priming operation is present or after the priming is operated and a spray starting means for operating the pump 3 when the temp. of a vaporizer detected by a temp. sensor 4g rises to the set vaporizing temp.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-fluid atomizing type liquid atomizing device which atomizes and atomizes another liquid by utilizing vapor of one liquid.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional liquid spraying device of this type. In the figure, 21 is a first tank for containing the liquid F1 for vapor, 22 is a liquid supply pipe having one end inserted in the first tank 21, 23 is an electromagnetic pump interposed in the liquid supply pipe 22, 24 Is a vaporizer connected to the inlet of the other end of the liquid supply pipe 22, and 25 is a first nozzle attached to the outlet of the vaporizer 24.

Further, 26 is a second tank for containing the liquid F2 for spraying, 27 is a liquid absorption pipe having one end inserted into the second tank 26, and 28 is a second liquid pipe attached to the other end of the liquid absorption pipe 27. The nozzle 29 is a nozzle holder that holds both nozzles 25 and 28 in a predetermined positional relationship.

Each of the nozzles 25 and 28 is made of a metal small-diameter pipe material, and the second nozzle 28 is arranged in front of the first nozzle 25 in a direction orthogonal to the center line of the first nozzle 25.

The vaporizer 24 has an inlet 2 as shown in FIG.
4a and the outlet 24b, a metal vaporizer main body 24d provided with a vaporization chamber 24c communicating with these, a vaporization element 24e such as a metal sintered product disposed in the vaporization chamber 24c, and a bottom surface of the vaporizer main body 24d. Panel-shaped heater 24f attached,
A temperature sensor 24g made of a thermistor is attached to the vaporizer main body 24d, a liquid supply pipe 22 is fitted in the inlet 24a, and a first nozzle 25 is fitted in the outlet 24b.

In the above-mentioned liquid spraying device, the heater 24f is energized based on the operation of an operation switch (not shown), and the vaporizer temperature detected by the temperature sensor 24g instantaneously vaporizes the vapor liquid F1. When the operation of the pump 23 is started when the temperature has risen to a possible set vaporization temperature (about 180 ° C. when water is used as the liquid F1 for vapor), the liquid F1 for vapor in the first tank 21 is stored in the vaporizer 24. It is sent to the vaporization chamber 24c and vaporized, and the vapor is blown out from the first nozzle 25.

Due to this blow-out steam, a negative pressure is generated at the tip of the second nozzle 28 due to the Venturi action, and the negative pressure causes the spray liquid F2 in the second tank 26 to be sucked up to the tip of the second nozzle 28. , The liquid F2 collides with the blowing steam, is atomized, and is sprayed together with the steam.

[0008]

By the way, when the liquid pressure pump 23 used in the liquid spraying device is operated in a state where air is trapped inside, there is a possibility that a blanking phenomenon may occur to cause failure or damage. is there. Therefore, during the initial operation after product assembly, only the pump 23 is operated to expel the internal air to fill the vapor liquid F1.
A so-called priming operation is required.

However, in the above-mentioned conventional liquid spraying device, since there is no bypass between the pump 23 and the vaporizer 24, when the priming operation is performed, the vapor liquid F1 is sent into the vaporizer 24 and the first nozzle There is a problem that liquid leakage from 25 occurs, water droplets or steam of hot water is jetted, the inside of the vaporizer 24 is filled with the vapor liquid F1, the heat load of the vaporizer 24 increases, and it takes time to raise the temperature. ..

Further, since the above-mentioned priming operation is basically useful if it is performed once during the initial operation, if the priming operation is performed every time the operation is restarted, the operation time will be lost and the spraying will start. There is a drawback that the time until is delayed.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a liquid spraying device which can appropriately perform a priming operation during an initial operation.

[0012]

To achieve the above object, in claim 1, a first tank containing a liquid for vapor, a liquid supply pipe having one end inserted in the first tank, and a liquid supply pipe are provided. A carburetor having a pump interposed therein, a vaporizer main body having an outlet / inlet and a vaporizer chamber, and a heater for heating the vaporizer main body, the other end of the liquid supply pipe being connected to the inlet, and a vaporizer A temperature sensor for detecting the temperature, a first nozzle provided at the outlet of the vaporizer, a second tank for containing the spraying liquid, a liquid absorption pipe having one end inserted in the second tank, and a liquid absorption pipe. In a liquid spraying device comprising a second nozzle provided at the other end of the first nozzle in a direction orthogonal to the first nozzle, the liquid spraying device extends from the pump outlet side of the liquid supply pipe to the first tank. If a return pipe is provided and an on-off valve is provided in the return pipe, In addition, if there is a priming storage means for storing the priming operation in the past, priming means for operating the pump for a predetermined time to open the on-off valve when the priming storage means has no memory for the priming operation, A heater energizing means for starting energization of the heater based on the operation of turning on the operation switch after the priming operation is performed, and a pump when the carburetor temperature detected by the temperature sensor rises to the set vaporization temperature. And a spray starting means for operating the.

According to a second aspect of the present invention, there is provided a first liquid containing vapor liquid.
A tank, a liquid supply pipe having one end inserted in the first tank, a pump interposed in the liquid supply pipe, a vaporizer main body having an outlet / inlet and a vaporization chamber, and a heater for heating the vaporizer main body.
A vaporizer having an inlet connected to the other end of the liquid supply pipe, a temperature sensor for detecting the vaporizer temperature, a first nozzle provided at the outlet of the vaporizer, and a second nozzle for containing a spray liquid.
A tank; a liquid suction pipe having one end inserted into the second tank; and a second nozzle provided at the other end of the liquid suction pipe and arranged in front of the first nozzle in a direction orthogonal to the first nozzle. In the liquid spraying device provided, a return pipe is provided extending from the pump outlet side of the liquid supply pipe to the first tank, and a three-way switching valve is provided in the connection portion of the return pipe with the liquid supply pipe, When there is a priming storage means for storing the past priming operation, a priming means for operating the pump for a predetermined period of time when the priming storage means does not store the priming operation, and a priming operation for switching the switching valve to the pipe side Alternatively, the heater energizing means that starts energizing the heater based on the operation of turning on the operation switch after the priming operation is performed, and the carburetor temperature detected by the temperature sensor has risen to the set vaporization temperature. It is provided and the spray starting means for actuating the pump.

[0014]

In the liquid spraying device according to the first aspect of the present invention, when the power is turned on, the stored content in the priming storage means is read to confirm whether or not the priming operation has been performed in the past. If no priming action has been performed in the past,
The pump is operated for a predetermined time and the on-off valve is opened. That is, the liquid for vapor is sent into the pump to expel the air therein, and the excess liquid for vapor is returned to the first tank through the return pipe without being sent to the carburetor side.

When the priming operation has been performed in the past,
After the priming operation is performed, the heater is energized to turn on the heater to heat the carburetor body. When the carburetor temperature rises to the set vaporization temperature due to this heater heating, the pump starts operating and atomization is started.

In the liquid spraying apparatus according to the second aspect, when the power is turned on, the stored content in the priming storage means is read to confirm whether or not the priming operation has been performed in the past. When the priming operation has not been performed in the past, the pump is operated for a predetermined time and the switching valve is switched to the return pipe side. That is, the liquid for vapor is sent into the pump to expel the air therein, and the excess liquid for vapor is returned to the first tank through the return pipe without being sent to the carburetor side. Other functions are the same as those in claim 1.

[0017]

1 to 4 show one embodiment of the present invention. FIG. 1 is a schematic side view of a liquid spraying apparatus, FIG. 2 is an electric circuit diagram of a control system, and FIGS. 3 and 4 are spraying control. It is a flowchart of.

First, the mechanical structure of the liquid spraying device will be described with reference to FIG.

In the figure, 1 is a first tank for containing a liquid F1 for vapor such as water or purified water, and 2 is a liquid supply pipe having one end inserted in the first tank 1.

Reference numeral 3 is an electromagnetic pump installed in the liquid supply pipe 2. The pump 3 is provided with a level sensor 3a for detecting the filling amount of the internal liquid. This level sensor 3a is not only an ultrasonic sensor or a photoelectric sensor but also a strain sensor.
Ji etc. can be used.

Reference numeral 4 is a vaporizer in which the other end of the liquid supply pipe 2 is connected to its inlet. The vaporizer 4 has the same structure as that of the conventional one shown in FIG. 7, in which the liquid supply pipe 2 is fitted in the inlet and the first nozzle 5 is fitted in the outlet. In the figure, 4f is a heater and 4g is a thermistor temperature sensor.

Reference numeral 6 is a second tank for containing a spraying liquid F2 such as deodorant liquid and disinfectant liquid, 7 is a liquid absorbing pipe having one end inserted in the second tank 6, and 8 is the other end of the liquid absorbing pipe 7. Is a second nozzle attached to the. The second nozzle 5 and the first nozzles 5 and 8 are each made of a small-diameter pipe material made of metal, and the second nozzle 8 is connected to the center line of the first nozzle 5 in front of the first nozzle 5 via a nozzle holder 9. They are arranged in a direction orthogonal to each other.

Reference numeral 10 is a return pipe extending from the pump outlet side of the liquid supply pipe 2 to the first tank 1, and 11 is a normally closed electromagnetic on-off valve interposed in the return pipe 10.

Next, the control configuration of the liquid spraying device will be described with reference to FIG.

In the figure, 12 is a micro computer.
Control circuit of the data structure, 13 is an operation switch for controlling the start and stop of spraying, 14 is a priming switch for operating the priming operation, 15 is an indicator for activating priming, 16 is a commercial AC power supply, and 17 is a solid state relay. -(Hereinafter referred to as SSR), 18 is an electromagnetic first relay, and 19 is an electromagnetic second relay.
The relay 20 is a memory circuit for storing the presence or absence of the priming operation. In the figure, 3 is a pump, 3a is a level sensor,
4f is a heater, 4f is a temperature sensor, and 11 is an on-off valve.

SSR 17 and first and second relays 18 and 19
Is connected to the output port of the control circuit 12, the open / close contact of the SSR 17 is connected to the heater 4f in series, and the open / close contact of the first relay 18 is connected to the pump 3 in series. Further, the opening / closing valve 11 is connected in series to the opening / closing contact of the second relay-19. That is, the heater 4f, the pump 3 and the on-off valve 11 can be supplied with predetermined drive power from the commercial AC power supply 16 by turning on the SSR 17 and the first and second relays 18 and 19.

The memory circuit 20 is composed of an RS flip-flop having three gate circuits 20a to 20c.
Both input terminals of the gate circuit 20a and one input terminal of the gate circuit 20c are connected to the output port of the control circuit 12, and the output terminal of the gate circuit 20c is connected to the input port of the control circuit 12. -Connected to In this memory circuit 20, the control circuit 12 sends a high-level signal (a signal indicating that there is a priming operation) to the gate circuit 20a, so that the gate circuit 20a.
High level signal from the output terminal of c (signal with memory)
Can be stored and held while being sent to the control circuit 12. Further, by sending a high level reset signal from the control circuit 12 to the gate circuit 20c, the above stored contents are erased, and a low level signal (a signal without storage) is output from the output terminal of the gate circuit 20c. Can be sent to the control circuit 12.

An operation switch 13, a priming switch 14, a temperature sensor 4g and a level sensor 3a are connected to the input port of the control circuit 12, and a display 15 is connected to the output port. .. In the control circuit 12, operation signals of the operation switch 13 and the priming switch 14,
Based on the detection signals of the level sensor 3a and the temperature sensor 4h and the output signal of the storage circuit 20, the SSR 17 and the first and second relays 18 and 19 are appropriately opened and closed according to a control program described later, and the display 15 is displayed. In addition, a signal indicating that there is a priming operation can be supplied to the memory circuit 20.

Next, the spraying operation of the liquid spraying apparatus will be described with reference to FIGS. 3 to 4.

The contents stored in the storage circuit 20 are read based on the power-on, and it is confirmed whether or not the priming operation has been performed in the past (S1 in FIG. 3). Specifically, whether or not the priming operation is performed is confirmed from the level of the signal sent from the output terminal of the storage circuit 20 to the input port of the control circuit 12.

At the time of initial operation after the product is assembled, a low level signal (a signal without memory) is sent from the output terminal of the memory circuit 20 to the input port of the control circuit 12. A message for use, for example, "Please turn on the priming switch" is displayed on the display 15 and waits for the turning on of the priming switch 14 (S in FIG. 3).
2).

In the priming standby state described above, the priming switch 1
When the switch 4 is turned on, the timer is started, the first and second relays 18 and 19 are closed, the operation of the pump 3 is started, and the on-off valve 11 is opened (S3 to S6 in FIG. 3). ..

As a result, the vapor liquid F1 is stored in the pump 3.
Is sent to expel the air inside, and the excess liquid F1 for vapor is returned to the first tank 1 through the return pipe 10 without being sent to the vaporizer 4 side.

A predetermined time, for example 10
After a lapse of seconds, the first and second relays 18 and 19 are opened, the operation of the pump 3 is stopped, and the on-off valve 11 is closed (S7 to S9 in FIG. 3).

After the priming operation, the control circuit 12 sends a high-level signal (a signal indicating priming operation) to the input terminal of the gate circuit 20a of the memory circuit 20, and the memory circuit 2
The fact that the priming operation has been performed is stored in 0 (S10 in FIG. 3). As a result, a high-level signal (a signal with memory) is sent from the output terminal of the memory circuit 20 to the input port of the control circuit 12.

After the priming operation, the operation standby state is entered to wait for the operation switch 13 to be turned on. When the operation switch 13 is turned on, the SSR is closed and the heater 4f starts to be energized. Is heated (S1 in FIG. 4)
1, S12).

When the vaporizer temperature detected by the temperature sensor 4h rises to the set vaporization temperature at which the vapor liquid F1 can be instantly vaporized, for example, 180 ° C. by the above heating, the first relay 17 is closed and the pump 3 of the pump 3 is closed. The operation starts (S13 and S14 in FIG. 4).

After the pump is operated, the spraying operation is performed by the same action as in the conventional case, and the vaporizer temperature during the steady spraying is the heater 4f.
The vaporization temperature is maintained at the set vaporization temperature by the energization control (S15 in FIG. 4).

When the operation switch 13 is turned off during spraying, the first relay 18 and the SSR 17 are closed and the heat
The power supply to the switch 4f is stopped and the operation of the pump 3 is stopped (S16 to S18 in FIG. 4). At the same time, the timer starts
Then, the second relay 19 is closed and the on-off valve 11 is opened (S19, S20 in FIG. 4).

As a result, the liquid for vapor F1 staying in the liquid supply pipe 2 on the inlet side of the vaporizer 4 and the pump outlet side is passed through the return pipe 10 by the internal pressure of the vaporizer 4 to the first tank 1
Returned inside.

A predetermined time, for example, 15 after the above OFF operation.
After a lapse of seconds, the second relay 18 is opened and the opening / closing valve 11 is opened.
Is blocked (S21 and S22 in FIG. 4), and the spraying is stopped.

After the spraying is stopped, the operation standby state is entered, and the operation switch 13 is turned on (S23 in FIG. 4). When the operation switch 13 is turned on again in this standby state,
If the power is cut off and then turned on again, S
Returning to 1, the stored contents in the storage circuit 20 are read, and it is confirmed whether or not the priming operation has been performed in the past.

In the state where the priming operation has already been carried out, since a high level signal (signal with storage) is sent to the input port of the control circuit 12 from the output terminal of the storage circuit 20, the level is continued. The liquid filling status in the pump 3 is confirmed from the detection signal of the sensor 3a (S2 in FIG.
4).

When the liquid F1 for vapor in the pump 3 spontaneously evaporates for a long period of time when the operation is stopped or when air enters the pump 3 for some reason, the pump 3
It is judged that the liquid in the inside is insufficient, and a high-level reset signal is sent from the control circuit 12 to the input terminal of the gate circuit 20c of the storage circuit 20 to erase the stored contents of the storage circuit 20 (S25 in FIG. 3). .. As a result, a low level signal (a signal without memory) is sent from the output terminal of the gate circuit 20c of the memory circuit 20 to the input port of the control circuit 12.

After that, the process proceeds to S2, and the priming operation, the priming operation memory and the spraying operation are sequentially performed in the same procedure as above. If it is determined in S24 that the liquid in the pump 3 is sufficiently filled, the process proceeds to S11 and the spraying operation is performed in the same procedure as described above.

As described above, according to the liquid spraying device described above,
During the initial operation when the priming operation has never been performed,
After the priming switch 14 is turned on, that is, after the priming operation, only after the priming operation is performed, the operation switch 13 is not turned on. Therefore, the priming operation is forcibly performed during the initial operation to ensure that the pump 3 is not damaged or damaged. Can be prevented.

While the pump 3 is being operated based on the operation of turning on the priming switch 14, the opening / closing valve 11 is opened so that the excess vapor liquid F1 can be returned to the first tank 1 through the return pipe 10. Therefore, during the priming operation, the liquid F1 for vapor is not sent to the carburetor 4 side to cause liquid leakage from the first nozzle 5. In addition, it is possible to prevent an increase in the heat load of the vaporizer 24 and eliminate the influence on the rising of the start of spraying, and also to prevent vapor leakage from the first nozzle 5 due to the temperature rise.

Further, when the priming operation has already been carried out, the priming operation can be omitted based on the stored contents of the memory circuit 20, so that the priming operation is repeated every time the operation is restarted. Also, it is possible to reduce the loss of operating time and shorten the time until the start of spraying.

Furthermore, when the operation is restarted, the liquid filling amount in the pump 3 is checked, and if it is determined that the liquid filling is insufficient, the stored contents of the memory circuit 20 are erased to perform the priming operation. Even if the liquid F1 for vapor in the pump 3 spontaneously evaporates for a long stop time, or if air enters the pump 3 for some reason, the pump is operated by performing a priming operation before spraying. The safety against failure can be improved.

Furthermore, the opening / closing valve 1 is operated for a predetermined time after the spraying is stopped.
By opening 1, the liquid F1 for vapor accumulated in the inlet of the vaporizer 4 and in the liquid supply pipe 2 near the vaporizer is returned to the first tank 1 through the return pipe 10 by utilizing the internal pressure of the vaporizer 4. Therefore, the retained liquid is not vaporized by the residual heat and is not wastefully consumed, and the vapor leakage and the liquid leakage from the first nozzle 5 after the spraying is stopped can be prevented.

In the embodiment, the switch is provided for the priming operation, but if the priming operation is automatically switched to when the priming operation is not stored, the switch and the indicator are not always required. Not necessary. Further, in order to store and hold the priming operation, the memory circuit is not limited to the flip-flop, and a circuit such as a ratchet relay having an equivalent function may be substituted, and the same function is processed in the control program. The same circuit can be eliminated.
Furthermore, although the one in which an on-off valve is provided in the middle of the return pipe is shown, a three-way switching valve is provided at the connection part between the return pipe and the liquid supply pipe, and the switching valve is switched to the return pipe side during the priming operation. The excess vapor liquid may be returned from the pump outlet to the first tank through the return pipe.

[0052]

As described above in detail, according to the liquid spraying device of the first and second aspects, during the initial operation in which the priming operation has not been performed even once, the operation switch which must be turned on after the priming operation is turned on. Since the operation is not accepted, it is possible to reliably prevent the pump from being broken or damaged by forcibly performing the priming operation during the initial operation.

Further, during the priming operation, the on-off valve is opened or the switching valve is switched to the return pipe side so that the excess vapor liquid can be returned to the first tank through the return pipe. Will not be sent to the vaporizer side to cause liquid leakage from the first nozzle. Also,
It is possible to prevent an increase in the heat load of the vaporizer and eliminate the influence of the start of spraying on the rise, and to prevent vapor leakage from the first nozzle due to the temperature rise.

Further, when the priming operation has already been performed, the priming operation can be omitted based on the stored contents of the priming storage means, so that the priming operation is repeated every time the operation is restarted. Without incident,
The loss of operating time can be eliminated and the time to start spraying can be shortened.

[Brief description of drawings]

FIG. 1 is a schematic side view of a liquid spraying device showing an embodiment of the present invention.

FIG. 2 is an electric circuit diagram of a control system.

FIG. 3 Flow chart of spray control

FIG. 4 Flow chart of spray control

FIG. 5 is a schematic side view of a liquid spraying device showing a conventional example.

6 is a sectional view of the vaporizer shown in FIG.

[Explanation of symbols]

1 ... First tank, F1 ... Liquid for vapor, 2 ... Liquid supply pipe,
3 ... Pump, 4 ... Vaporizer, 4f ... Heater, 4g ... Temperature sensor, 5 ... 1st nozzle, 6 ... 2nd tank, F2 ... Spray liquid, 7 ... Liquid absorption pipe, 8 ... 2nd nozzle, 10 ... Return pipe, 11 ... On-off valve, 12 ... Control circuit, 13 ... Operation switch, 20 ... Storage circuit.

Claims (2)

[Claims] 1. A first tank containing a liquid for vapor, a liquid supply pipe having one end inserted in the first tank, a pump interposed in the liquid supply pipe, an outlet / inlet, and a vaporization chamber. The carburetor main body and a heater for heating the carburetor main body, the carburetor having the inlet connected to the other end of the liquid supply pipe, the temperature sensor for detecting the carburetor temperature, and the carburetor outlet provided A first nozzle, a second tank containing a liquid for spraying, a second
Liquid spraying apparatus including a liquid suction pipe having one end inserted in a tank, and a second nozzle provided at the other end of the liquid suction pipe and arranged in front of the first nozzle in a direction orthogonal to the first nozzle In, a return pipe is provided extending from the pump outlet side of the liquid supply pipe to the first tank, an opening / closing valve is provided in the return pipe, and a priming storage means for storing a past priming operation, and a priming storage means If there is no memory for priming operation, the priming means for operating the pump for a predetermined time to open the on-off valve, and if there is a memory for priming operation or after the priming operation has been performed A heater energizing means for starting energization of the heater and a spray starting means for activating the pump when the carburetor temperature detected by the temperature sensor has risen to the set vaporization temperature are provided. Liquid spraying apparatus according to. 2. A first tank containing a liquid for vapor, a liquid supply pipe having one end inserted into the first tank, a pump interposed in the liquid supply pipe, an outlet / inlet, and a vaporization chamber. The carburetor main body and a heater for heating the carburetor main body, the carburetor having the inlet connected to the other end of the liquid supply pipe, the temperature sensor for detecting the carburetor temperature, and the carburetor outlet provided A first nozzle, a second tank containing a liquid for spraying, a second
Liquid spraying apparatus including a liquid suction pipe having one end inserted in a tank, and a second nozzle provided at the other end of the liquid suction pipe and arranged in front of the first nozzle in a direction orthogonal to the first nozzle In the above, a return pipe is arranged from the pump outlet side of the liquid supply pipe to the first tank, and a three-way switching valve is provided in the connection portion of the return pipe with the liquid supply pipe, and the past priming operation is performed. The priming storage means to be stored, and the priming means for activating the pump for a predetermined time to switch the return valve to the pipe side when there is no priming operation stored in the priming storage means, and when the priming operation is memorized or the priming operation is performed. The heater energizing means for starting energization of the heater based on the operation of the operation switch after the operation, and the pump when the carburetor temperature detected by the temperature sensor rises to the set vaporization temperature. Provided a spray initiation means for actuating, liquid spray apparatus characterized by.