JP2006167640A - Sanitizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive and highly reliable sterilizer.
A flow rate detection unit for detecting the amount of water pumped from a pump, a pressure detection unit for detecting pressure, a pump device capable of variably injecting a chemical solution, a chemical tank for storing the chemical solution, and the flow rate detection unit In the sterilizer equipped with a control unit that controls the pump device by a signal from the flow rate, when the signal from the flow rate detection unit is near the detectable minimum flow rate or near the maximum flow rate, the flow rate is determined by the signal from the pressure detection unit. It is characterized by guessing.
[Selection] Figure 3

Description

  The present invention relates to a sterilizer that injects a chemical into water pumped from a pump.

  As shown in Japanese Patent Laid-Open No. 54-28444, a conventional sterilizer uses a step-variable variable-speed motor to gradually supply chlorine in accordance with a value related to the flow rate on the discharge side of the water supply pump. By changing it, it is intended to obtain a relatively constant chlorine concentration with respect to fluctuations in the amount of water supply.

  As another example, as disclosed in JP-A-5-309373, when both the pressure switch and the flow rate switch provided in the pump are emitting an ON signal, it is determined that the flow rate of the feed water is large, and the chemical solution is injected. Operate the unit continuously. When the pressure switch emits an OFF signal and the flow switch emits an ON signal, the flow rate of the feed water is determined to be in the middle to low water volume range, and the injector is intermittently operated to reduce the injection volume of the chemical solution. To prevent the residual chlorine concentration from becoming too high when the flow rate is small.

  As another example, as disclosed in Japanese Patent Application Laid-Open No. 11-19653, when the flow rate signal corresponding to the flow rate from the flow rate detection means is greater than or equal to a predetermined value, the flow rate of the chemical solution is substantially proportional to the flow rate of the feed water based on the flow rate signal. In this case, a chemical liquid injection device is provided for injecting a chemical liquid at a predetermined flow rate into the water supply when the water supply pump is in operation and the water supply pump is in operation and the flow rate signal is less than the predetermined value.

JP 54-28444 A JP-A-5-309373 Japanese Patent Laid-Open No. 11-19653

  In the conventional sterilizer, when both the pressure switch and the flow rate switch provided in the pump are emitting ON signals, it is determined that the flow rate of the feed water is large, and the chemical solution injector is continuously operated. When the pressure switch emits an OFF signal and the flow switch emits an ON signal, the flow rate of the feed water is judged to be in the middle to low water volume range, and the injector is intermittently operated to reduce the injection volume of the chemical solution. .

  In this sterilization device, when the pressure switch emits an OFF signal and the flow rate switch emits an ON signal, that is, in the middle to small amount of water supply, the injector is operated intermittently to inject the chemical solution. Although the amount is reduced, since the pressure switch OFF signal is used as the condition for intermittent operation of the injector, the flow rate value to switch to intermittent operation is as large as half of the maximum flow rate. In the area up to the slight flow rate where the OFF signal is issued, the chemical concentration in the feed water could not be finely controlled.

  In addition, when both the pressure switch and the flow rate switch are emitting ON signals, the injector is continuously operated, but the flow rate of the chemical solution is not controlled according to the flow rate of the feed water. Could not be controlled.

  For another sterilizer, when the flow rate signal according to the flow rate from the flow rate detection means is greater than or equal to a predetermined value, the flow rate of the chemical is almost proportional to the flow rate of the feed water based on the flow rate signal, and the feed water pump is in operation In addition, when the flow rate signal is less than a predetermined value, a chemical solution injection device for injecting a chemical solution at a predetermined flow rate into the feed water is provided, and the residual chlorine concentration is kept relatively constant. If the minimum detection flow rate is the standard, the maximum detection flow rate is about 10 times the minimum detection flow rate. If the maximum detection flow rate is 50 L / min, the minimum detection flow rate is about 5 L / min. The range of use of the vessel itself was likely to be limited.

  Furthermore, in the sterilizer described above, since the flow rate detection means is controlled alone, water that is not sterilized is supplied when the flow rate detection means breaks down, and there is a risk that water with a very high residual chlorine concentration will be supplied. There was.

  In order to achieve the above object, the sterilizer of the present invention includes a flow rate detection unit for detecting the amount of water pumped from a pump, a pressure detection unit for detecting pressure, a pump device capable of variably injecting a chemical solution, In a sterilizer equipped with a chemical tank that stores chemical liquid and a control unit that controls the pump device by a signal from the flow rate detection unit, the signal from the flow rate detection unit is near the minimum flow rate or near the maximum flow rate that can be detected. The flow rate was estimated from the signal from the pressure detection unit, and the chemical solution was variably injected.

  Next, a flow rate detection unit for detecting the amount of water pumped from the pump, a pressure detection unit for detecting pressure, a pump device capable of variably injecting a chemical solution, a chemical tank for storing the chemical solution, and a flow rate detection unit While letting the sterilizer equipped with a control unit that controls the pump device by the signal determine whether the flow rate detection unit and the pressure detection unit are out of order by combining the signal from the flow rate detection unit and the signal from the pressure detection unit If the signal from the pressure detection unit hardly changes during the time when the signal from the flow rate detection unit detects that the flow rate is not flowing and the time when it is detected that the flow rate is flowing, the pressure detection unit will fail. Let them be judged. Furthermore, when the signal from the pressure detector detects that the pressure has changed, if the signal from the flow detector hardly changes, it is determined that the flow detector has failed. In addition, in the combination of signals from the pressure detection unit and the flow rate detection unit, an abnormality is displayed when either the flow rate detection unit or the pressure detection unit fails.

  According to the present invention, a flow rate detection unit for detecting the amount of water pumped from a pump, a pressure detection unit for detecting pressure, a pump device capable of variably injecting a chemical, a chemical tank for storing the chemical, and the flow rate The signal from the pressure detector when the signal from the flow rate detection unit is near the minimum or maximum detectable flow rate in the sterilizer equipped with a control unit that controls the pump device by the signal from the detection unit. By estimating the flow rate and variably injecting the chemical solution, even when the flow rate detection system is set to the relatively small water volume side, even when the maximum detection flow rate of the flow rate detection unit is reached, the estimation from the signal from the pressure detection unit Therefore, a sterilizer having a very large flow rate range can be provided. In addition, the current pressure detector is very inexpensive and is available with high accuracy.

  Next, it is determined whether the flow rate detection unit and the pressure detection unit are out of order by a combination of the signal from the flow rate detection unit and the signal from the pressure detection unit, and the signal from the flow rate detection unit is flowing in the flow rate. If the signal from the pressure detection unit hardly changes during the time when it is detected that the flow rate is flowing from when it is detected that the flow rate is flowing, it is determined that the pressure detection unit has failed. Furthermore, when the signal from the pressure detector detects that the pressure has changed, if the signal from the flow detector hardly changes, it is determined that the flow detector has failed. In addition, when it is determined that there is an abnormality as described above, by displaying an abnormality, water that is not sterilized when the flow rate detection unit or pressure detection unit fails or water that has a very high residual chlorine concentration is supplied. Disappears.

  An embodiment of the invention will be described with reference to FIGS.

  FIG. 1 is an overall configuration diagram of a sterilizer of the present invention, FIG. 2 is a system of a sterilizer and a pumping pump, and FIG. 3 is a diagram showing a relationship between a signal from a flow rate detection unit and pumping pumping characteristics. 4 to 6 are diagrams showing combinations for determining abnormality detection.

  The whole structure of the sterilizer of this invention is demonstrated in FIG. 1, FIG.

  The sterilizer 1 is connected between the pipes 101 from the well pump 50 to the faucet 100, and is connected to the sterilizer 1 main body through the inflow flange 2 on the inflow side to the sterilizer 1 and the outflow flange 3 on the outflow side. Connect so that water can pass.

  A pressure detection unit 20 and a flow rate detection unit 25 are arranged on the downstream side of the inflow flange 2, and a control unit 30 that receives these detection signals is provided.

  The control unit 30 is provided with a display unit 31 capable of displaying an abnormality or the like.

  A chemical tank 4 for storing chemical liquid is provided, and an electric motor 11 that mechanically drives a pump head 12 is combined to constitute a pump device 10.

  The pump head 12 is connected by a tube suction tube (not shown) that sucks the chemical solution from the chemical solution tank 4, and injects the sucked chemical solution into the chemical solution inlet 7 provided in the water pipe 8 through the injection tube 9. .

  As a chemical solution, sodium hypochlorite is generally used.

  Next, the operation will be described.

  When the faucet 100 is opened, the pressure in the pipe 101, the well pump 50 and the sterilizer 1 decreases, and the well pump 50 starts operation by detecting the set pressure or flow rate. Also in the sterilizer 1 of the present invention, the flow rate detector 25 detects the flow rate, sends a signal to the control unit 30 to calculate the current flow rate, and injects a chemical solution corresponding to the flow rate, so that the motor 11 is activated. Control the number of revolutions. Means for controlling the rotational speed include inverter control and phase control.

  The pump head 12 sucks the chemical solution from the chemical solution tank 4 by the controlled number of revolutions, and injects the chemical solution from the chemical solution inlet 7 provided in the water conduit 8 through the injection tube 9.

  Water pumped from the well 102 that has passed through the flow rate detection unit 25 circulates inside the water pipe 8, and the water is sterilized by the injected chemical solution.

  The sterilized water flows out of the faucet 100 through the outflow flange 3 and the pipe 101. At this time, when the amount of water used increases, the flow rate detection unit 25 inside the sterilizer 1 detects an increase in the flow rate and sends a signal to the control unit 30 to increase the number of revolutions of the electric motor 11, thereby increasing the chemical solution of the pump device 11. Increase injection volume and disinfect appropriately.

  When the use of water is stopped and the faucet 100 is closed, the flow rate detection unit 25 detects and sends a signal to the control unit 30 to stop the pump device 10.

  Next, the present invention will be described with reference to FIGS.

  When the faucet 100 is opened, the pressure in the pipe 101, the well pump 50 and the sterilizer 1 decreases, and the well pump 50 starts operation by detecting the set pressure or flow rate. Also in the sterilizer 1 of the present invention, the flow rate detector 25 detects the flow rate, sends a signal to the control unit 30 to calculate the current flow rate, and injects a chemical solution corresponding to the flow rate, so that the motor 11 is activated. Control the number of revolutions.

  At this time, when the amount of water used increases, the flow rate detection unit 25 inside the sterilizer 1 detects an increase in the flow rate and sends a signal to the control unit 30 to increase the number of revolutions of the electric motor 11, thereby increasing the chemical solution of the pump device 11. Although the amount of injection is increased and properly sterilized, the flow rate detection device used in general sterilizers detects the maximum detected flow rate only about 10 times the minimum detected flow rate when the minimum detected flow rate is used as a standard. I can't.

  Therefore, there is a problem that the accuracy of the minimum detection flow rate must be increased and the maximum detection flow rate must be lowered in order for the pump device for chemical solution injection to accurately inject the chemical solution up to a low water amount. As a result, in the case of a pump with a large pumping amount, the residual chlorine concentration in the small water volume region becomes unstable. As illustrated in FIG. 3, the flow rate can be detected up to A L / min and the residual chlorine concentration is kept constant, but the flow rate detection saturates and the injection rate does not increase when it exceeds A L / min. Therefore, the residual chlorine concentration becomes thin. In some cases, it was necessary to use different sterilizers for large water volume and small water volume.

  According to the present invention, the injection amount is controlled by the flow rate detection unit 25 until the pumping amount is AL / min, but the signal from the flow rate detection unit 25 is saturated due to the AL / min or more, and the pressure detection unit 20 reduces the pressure. If detected, it is determined that the flow rate has increased, and the number of revolutions of the electric motor 11 is further increased to increase the amount of chemical liquid injected. Thereby, the fall of residual chlorine concentration can be suppressed.

4 to 6,
When the pressure detection unit 20 and the flow rate detection unit 25 are normal, the internal pressure decreases and the flow rate increases when the faucet 100 is opened as shown in the relationship between the time, the head, and the amount of water shown in FIG.

  Next, when the pressure detection unit 20 is out of order, the pressure does not change even if the amount of water is detected as shown in FIG.

  In addition, when the flow rate detection unit 25 is out of order, the pressure decreases but the amount of water is not detected.

  When these states shown in FIGS. 5 and 6 occur, they are displayed as abnormal.

The whole block diagram of the sterilizer of the present invention. System diagram of sterilizer and pump. The figure which shows the relationship between the signal from a flow volume detection part, and pump pumping characteristics. The figure which shows the combination for judging abnormality detection. The figure which shows the combination for judging abnormality detection. The figure which shows the combination for judging abnormality detection.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Sterilizer, 2 ... Inflow flange, 3 ... Outflow flange, 4 ... Chemical solution tank, 7 ... Chemical solution injection port, 8 ... Water supply pipe, 9 ... Injection tube, 10 ... Pump apparatus, 11 ... Electric motor, 12 ... Pump head , 20 ... pressure detection unit, 25 ... flow rate detection unit, 30 ... control unit, 31 ... display unit.

Claims (6)

Based on signals from a flow rate detection unit that detects the amount of water pumped from the pump, a pressure detection unit that detects pressure, a pump device that can variably inject chemicals, a chemical tank that stores the chemicals, and a signal from the flow rate detection unit In the sterilizer equipped with a control unit for controlling the pump device,
A sterilizer that estimates a flow rate based on a signal from a pressure detection unit when a signal from the flow rate detection unit is near a detectable minimum flow rate or a maximum flow rate. The sterilizer of claim 1,
A sterilizer characterized in that when a signal from the flow rate detection unit is near a detectable minimum flow rate or near a maximum flow rate, the flow rate is estimated by a signal from the pressure detection unit and a chemical solution is variably injected. Based on signals from a flow rate detection unit that detects the amount of water pumped from the pump, a pressure detection unit that detects pressure, a pump device that can variably inject chemicals, a chemical tank that stores the chemicals, and a signal from the flow rate detection unit In the sterilizer equipped with a control unit for controlling the pump device,
A sterilizer that determines whether the flow rate detection unit and the pressure detection unit are out of order based on a combination of a signal from the flow rate detection unit and a signal from the pressure detection unit. The sterilizer of claim 3,
If the signal from the pressure detector hardly changes between the time when the signal from the flow rate detector detects that the flow rate is not flowing and the time when the flow rate is detected to be detected, the pressure detector has failed. A sterilizer characterized by determining that the The sterilizer of claim 3,
When the signal from the pressure detector detects that the pressure has changed, if the signal from the flow detector hardly changes, it is determined that the flow detector is out of order. . In the sterilizer of claim 3, claim 4 and claim 5,
A sterilizer that displays an abnormality when one of the flow rate detection unit and the pressure detection unit fails in a combination of signals from the pressure detection unit and the flow rate detection unit.

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