JPH0510600A - Purifying device for hot water in bathtub - Google Patents

Abstract

PURPOSE:To prevent damage of a purifying device due to an operation of a circulation pump without load or an operation of an insulation heater without load by arranging a hot water flow sensing electrode for detecting presence or absence of a hot water flow in a circulation passage of hot water of a bathtub, and forming one of hot water flow electrodes of a conductive flange of a hot water insulating heater for the bathtub. CONSTITUTION:In a hot water flow sensing electrode 11, a contact 23 of a flange 18 as one pole is connected to the other electrode 27 inserted into a tank 20 via a lead 24 through a low voltage DC power source 25 and a fan meter 26. The flange 18 of a heat insulating heater used as one pole in the electrode 11 is always heated by the heat of an electric heater 17, and immediately dried when hot water flow in the tank 20 is stopped. Thus, since the electrode is moistened even if the hot water flow is eliminated, a surface resistance is not lost, no erroneous operation for varying a resistance between the electrodes does not occur, but the resistance is immediately increased to sense no hot water flow.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathtub device, and more particularly to a bathtub hot water purifying device for detecting the presence or absence of hot water flowing in a circulation path to eliminate the flow of hot water and to keep a circulating pump idle or to keep warm. The present invention relates to a safety device for preventing the heater from being heated.

[0002]

2. Description of the Related Art Recently, hot water in a bathtub is forcibly circulated by a circulation pump in a circulation path provided with various cleaning devices, and dirt such as dirt and hair suspended in the hot water is filtered by a filtering device. A bath water purifying device for purifying hot water has been developed and widely used, for example, by performing activation treatment in an activated stone tank or sterilizing with a sterilizer.

More recently, in addition to simply purifying hot water, an electric heater for keeping warm water is also provided in order to keep the temperature of hot water constantly at an appropriate temperature and to be able to bathe comfortably at any time for 24 hours. A jet nozzle is installed at the outlet of the treated hot water to the bathtub to eject the jet flow.
I also started to enjoy the so-called bubble bath.

In such a bath water cleaning device,
For example, the hot water in the bathtub may be drained, or air may be sucked into the pipeline due to equipment damage or other reasons, and the hot water absorption capacity of the circulation pump may drop, causing no flow of water in the circulation path. It may end up.

When the flow of hot water in the circulation path disappears, naturally, the circulation pump runs dry and breaks, and the heater for heating keeps the heater dry, which may damage the device or even cause a fire. Will result.

Conventionally, as a safety device for preventing the occurrence of the above-mentioned accident, the presence or absence of the flow of hot water in the circulation path is detected by using a movable flow sensor such as a pressure switch. It was

[0007]

However, in the case where the presence or absence of hot water flow is detected by a movable sensor as in the conventional case,
If dirt or foreign substances are caught during long-term operation, the sensor will not operate normally and there will be many malfunctions, and even if there is no hot water flow, this will not be detected and the operation of the device will continue. There was.

An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a safety device capable of accurately detecting the presence or absence of hot water flow in any state.

[0009]

Means for Solving the Problems That is, the present invention relates to a bathtub hot water in which hot water in a bathtub drawn from a hot water pipe by a circulation pump is cleaned by various cleaning means, and then discharged again from the hot water pipe into the bathtub. In the cleaning device, a hot water flow detection electrode for detecting the presence or absence of hot water flow is provided in the circulation path of the hot water bath, and preferably one electrode of the hot water flow detection electrode is made of a conductive material of the heater for keeping hot water in the hot water bath. A bathtub cleaning device characterized by being a flange.

[0010]

The present invention is constructed as described above, and the presence or absence of hot water flow is detected by the change in resistance between the electrodes. Since there is no moving part in the sensor as in the prior art, it operates due to dirt or foreign matter in the hot water. Are not disturbed, and malfunctions do not occur due to these effects.

Further, if one electrode of the electrode is used as a conductive flange portion of the heater for heat retention, the water adhering to the electrode when the electrode is heated and the flow of hot water disappears is immediately dried by heat. Even if the flow of hot water disappears, the electrodes are wet so that there is a creeping resistance and there is no erroneous detection as if there was a flow of hot water.

[0012]

Embodiments of the present invention will be described with reference to the block diagram of FIG.

Reference numeral 1 denotes a bathtub. Hot water in the bathtub 1 is pumped up by a circulation pump 5 of a cleaning device 3, and dirt such as dust and hair floating in a filter device 4 in the cleaning device 3 is removed by a filter. After being kept at a predetermined temperature by the heater 6 for heat retention, a predetermined cleaning process such as ozone sterilization is performed by the sterilization device 7, and the hot water after the cleaning process is returned to the bathtub 1 from the hot water discharge pipe 8 again. Is discharged.

In such a cleaning treatment apparatus, as described above, the adsorption treatment of organic substances by activated carbon and the activation treatment by activated stone are carried out as necessary, and the hot water discharge pipe 8
A jet nozzle is attached to the tip of the nozzle to eject a jet flow into the bathtub 1 to form a so-called bubble bath.

Reference numeral 9 is a hot water temperature sensor for detecting the temperature of the hot water flowing in the cleaning processing apparatus 10, 10 is a flow rate sensor for detecting the presence or absence of the hot water flow by a pressure switch, and 11 is the resistance between the electrodes, that is, the presence or absence of the hot water flow. It is a hot water flow detection electrode that detects the creepage resistance.

Reference numeral 12 is an input device for inputting various operating conditions of the apparatus. For example, it is selected whether or not hot water is jetted from the jet nozzle to form the above-mentioned bubble bath.

Reference numeral 13 is a control device for totally controlling the operation of the device, 14 is a hot water temperature setting device for setting the heat retention temperature of hot water, and 15 is an operating condition once set such as hot water temperature. A storage device for backing up, and a display device 16 for displaying the set operating conditions.

In the apparatus constructed as described above, the presence or absence of molten metal flow is detected by the flow rate sensor 10 using the conventional movable pressure type switch and the electric resistance type molten metal flow detecting electrode 11. It has a heavy safety structure.

That is, when either the flow rate sensor 10 or the hot water flow detecting electrode 11 detects that the hot water flow has disappeared, the cleaning device 3 is controlled by the controller 13.
Since the operation is stopped, as described above, even if the flow sensor 10 becomes dirty or a foreign substance is caught, and the malfunction occurs, the presence or absence of the hot water flow is detected by the hot water flow detection electrode 11 so that safety is maintained. Be drunk

Although it is possible to detect the presence / absence of the molten metal flow more accurately by using only the molten metal flow detecting electrode 11 than in the case of the conventional flow sensor 10 alone, in the present embodiment, in order to further improve the reliability, the conventional flow amount is used. A sensor 10 is also provided.

Next, referring to FIG. 2 showing the heater 6 for heat retention as a front view and FIG. 3 shown as a side view, the hot water flow detecting electrode 11 is shown.
The actual deployment of is explained.

The heat retaining heater 6 has a conductive flange 18
The electric heater 17 attached to the tank is covered with a tank 20 having a hot water inlet 21 and a hot water outlet 22.
7 is a power supply line.

In the molten metal flow detection electrode 11, the contact 23 of the flange 18 as one pole and the other electrode 27 inserted in the tank 20 are connected to the lead wire 24 at a low voltage DC power supply 25 of about 5 V or less. And are connected via an ammeter 26.

Therefore, in the hot water flow detecting electrode 11, a change in resistance between the electrodes 18 and 27 due to the presence or absence of hot water flow in the tank 20 is detected by the ammeter 26, and the detection result is sent to the controller 13 by a signal line (not shown). Sent.

The flange 18 of the heat-retaining heater 6, which is used as one of the electrodes in the hot water flow detecting electrode 11, is constantly heated by the heat of the electric heater 17, and the tank 2
When the flow of hot water in 0 is stopped, the flange 18 becomes dry immediately.

For this reason, even if the flow of hot water disappears, there is no malfunction such that the creeping resistance is not lost and the resistance between the electrodes does not change because the electrodes are wet, and the resistance immediately increases and the flow of hot water disappears. Is detected.

[0026]

The present invention has the above-described structure and operation. The presence or absence of hot water flow is accurately detected without malfunction, and when the hot water flow is lost, this is immediately detected and the control device is notified. Therefore, it is possible to prevent the cleaning device from being damaged by operating the circulation pump or by heating the heat retention heater.

[Brief description of drawings]

[Figure 1] Block diagram,

FIG. 2 is a front view of a heat retention heater,

FIG. 3 is a side view of a heat retention heater.

[Explanation of symbols]

1 bathtub 2 Hot water pipe 3 cleaning device 5 circulation pumps 6 Heat insulation heater 11 Hot water detection electrode 18 flange

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location F24H 1/00 302 G 9251-3L

Claims (2)

[Claims] Claim: What is claimed is: 1. A bathtub hot water purifying device in which hot water in a bathtub pumped up from a hot water pipe by a circulation pump is cleaned by various cleaning means and then discharged again into the bathtub from a hot water discharge pipe. An apparatus for cleaning hot water in a bathtub, comprising a hot water flow detection electrode for detecting the presence or absence of hot water flow in the passage. 2. The apparatus for cleaning bathtub hot water according to claim 1, wherein one electrode of the hot water flow detection electrode is a conductive flange of a heater for keeping warm bath water.