JPH06213509A - Instantaneous clear water heater - Google Patents

Abstract

PURPOSE:To continuously obtain safety, odorless hot-water by a method wherein the hot-water heated by a heater is mixed with the outside air to create gas- phase in the hot-water, and the gas-phase is released into the outside air to release harmful volatile chemical substances contained in the hot-water along with the gas-phase. CONSTITUTION:During hot-water supply, city water enters a water purifier 2 where residual chlorine and odorous substances are removed by fine pores of built-in activated carbon and hollow fiber membrane. Then, purified water enters a heat exchanger 3, is heated to hot-water by a gas burner 4 and reaches a mixing chamber 7. In the mixing chamber 7, the outside air is mixed into the hot-water through an air suction hole 8 to create a gas phase of the outside air in the hot-water. Harmful volatile substances (such as trihalomethanes) contained in the hot-water transfer to the gas phase, are released along with the gas phase in a volatizing drum 5 and discharged into the outside air from a gas vent 10 via a selective membrane 9. After that, the clear water is delivered from a hot-water spout 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instant purified water heater for continuously obtaining purified water from tap water.
It is suitable for indoor use, especially for household installation in the kitchen.

[0002]

2. Description of the Related Art In recent years, the water quality of tap water sources such as rivers and lakes has deteriorated, so that the amount of chlorine used for removing, disinfecting and sterilizing organic substances and ammonia nitrogen has increased. At the same time as the odor of chlorine increases, this chlorine causes mutagenic substances (carcinogens) such as trihalomethane, which is a problem. In addition, algae are generated due to eutrophication of water quality, and the mold odor due to this is exacerbated. The odor and musty odor of tap water are remarkable in and around the city. Against the background of the above situation, a water purification apparatus for removing unpleasantness of tap water, harmful offensive odors, and foreign substances is becoming widespread in general households.

On the other hand, the instant water heater has been widely used as a simple household water heater, but its proportion used for direct drinking is low and it is often used for washing dishes. By the way, when hot water from an instant water heater is used for beverages, it is often reheated with a kettle or the like.

[0004]

By the way, the above-mentioned instantaneous water heater is directly connected to a water pipe, and heats a heat exchanger provided in a running water passage of tap water inside the instantaneous water heater by a gas burner. It is usually configured,
Since there is no open air from the water pipe to the hot water supply port, the unpleasant odor, harmful offensive odor, and foreign matter in the tap water are heated as they are and supplied from the hot water supply port. In particular, regarding trihalomethanes, even if a water purification device containing activated carbon or the like is installed in the preceding stage of the heat exchanger, the adsorption breakthrough phenomenon is likely to occur, and therefore sufficient effect can be obtained only at the initial stage of using activated carbon. Not known to be.

For the above reasons, the hot and cold water supplied from the instant water heater is mixed with the odor of musty odor, musty odor, trihalomethane, etc., which are heated and easily vaporized, which is not suitable for direct drinking. It is clear from the above-mentioned actual usage that it is hot and cold water. It is an object of the present invention to solve the above-mentioned problems and to provide an instant purified water heater capable of continuously obtaining safe and hot water having no bad odor.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention relates to an instantaneous water heater for heating tap water continuously supplied from an inlet pipe by a heating unit to supply hot water from a hot water supply port. A mixing section for mixing the outside air with the hot water heated by the heating section to generate a gas phase by the outside air in the hot water, and a volatilization tank for releasing the gas phase generated by the mixing section into the outside air. And the harmful vaporized substance in the hot water having moved to the gas phase is discharged together with the gas phase by the volatilization tank, and the hot water after the discharge is supplied from the hot water supply port. It is a purified water heater. Further, tap water continuously supplied from the water inlet pipe may be purified by a water purification treatment unit including activated carbon and a hollow fiber membrane, and then heated by the heating unit.

[0007]

[Operation] With the instant purified water heater constructed as described above,
A gas phase is generated in the hot and cold water heated by the heating unit by the mixing unit, and harmful vaporized substances in the hot and cold water move to the gas phase. This vaporized substance is released together with the vapor phase by the volatilization tank, and hot water after the vaporized substance is released is supplied from the hot water supply port. Further, since the odorous substance and the like are adsorbed and removed by installing the water purification unit in the preceding stage of the heating unit, the unpleasant offensive odor of the hot water obtained from the hot water supply port is further reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a schematic view showing the structure of an instant purified water heater, which includes a purified water treatment unit 2, a heat exchanger 3, a gas burner 4, a volatilization tank 5, a mixing unit 7, etc. in a main body exterior 1 and a conventional instantaneous hot water. A well-known ignition and temperature control device (not shown) is provided in the heater. The water purification unit 2 is a well-known unit including activated carbon and a hollow fiber membrane, and has a structure in which the internal filter medium can be replaced. The heat exchanger 3 and the gas burner 4 are well known in the conventional instantaneous water heater. Volatilization tank 5
The selective permeation membrane 9 having heat resistance, breathability and water impermeability is disposed on the upper part of the sheet, and a gas discharge port 10 communicating with the outside air is further provided on the upper part thereof. Further, a hot water supply port 11 and a discharge port 12 are provided in the lower part. Further, the tip of the water supply pipe for supplying hot water to the volatilization tank 5 has a porous structure, and the hot water supplied is in the form of a shower. A water level sensor 13 for detecting the water level is provided on the side surface of the volatilization tank 5 as is well known. The mixing section 7 has a well-known venturi structure and is provided with an intake hole 8.

Reference numeral 6 denotes a water inlet pipe, which is directly connected to a well-known water pipe (not shown). Reference numeral 14 is a flow rate control valve, which is inserted between the water inlet pipe 6 and the water inlet side of the water purifying unit 2. The flow rate control valve 14 is opened and closed in conjunction with the cock provided in the hot water supply port 11, and the flow level is controlled by the water level sensor 13 provided in the volatilization tank 5, so that the flow rate control valve 14 is not affected by the hot water supply amount. The water level in the volatilization tank 5 is kept constant.

At the time of hot water supply, tap water enters the water purification section 2 through the water inlet pipe 6, and residual chlorine and odorous substances are adsorbed and filtered off by the pores of the activated carbon and the hollow fiber membrane contained therein.
The purified water that has passed through the purified water treatment unit 2 reaches the heat exchanger 3 and is heated by the gas burner 4. Hot water after heating reaches the mixing section 7. The mixing portion 7 mixes the outside air from the intake hole 8 with the hot water to generate a gas phase of the outside air in the hot water. The harmful vaporized substance in the hot water moves to the vapor phase in the hot water. The hot and cold water having passed through the mixing section 7 flows into the volatilization tank 5.

As described above, the trihalomethane that cannot be completely removed by the adsorbent such as activated carbon in the water purification section 2 or is re-mixed by the adsorption breakthrough has a property of easily volatilizing (chloroform CHCl occupying about 60%). _{3 has} a boiling point of 6
1.2 ° C.) and abrupt heating by the heat exchanger 3 and at the same time vaporized by the introduction of the outside air in the mixing section 7 to move into the gas phase with a depressurizing effect and flow into the vaporization tank 5 in a gas-liquid mixed state, In the volatilization tank 5, the gas is discharged from the gas discharge port 10 through the selective permeable membrane 9. Hot water after the vaporized substance containing the trihalomethane is released is supplied from the hot water supply port 11.

When the hot water is not used for a certain period after the hot water is supplied, the hot and cold water in the volatilization tank 5 is discharged from the discharge port 12 manually or automatically. Although the mixing unit 7 has a Venturi structure that uses water supply pressure, it may be a unit that mixes it with hot water by forcibly taking in outside air with a pump or the like. Further, it is desirable that the outside air taken into the mixing section 7 is heated, and in this case, the temperature of the hot water obtained from the hot water supply port 11 can be prevented from lowering.

[0013]

As described above, the instant purified water heater of the present invention can continuously provide safe and hot water having no bad odor.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a configuration of an instant purified water heater according to an embodiment of the present invention.

[Explanation of symbols]

 1 Main body exterior 2 Water purification section 3 Heat exchanger 4 Gas burner 5 Volatilization tank 6 Water inlet pipe 7 Mixer 8 Intake hole 9 Selective permeable membrane 10 Gas discharge port 11 Hot water inlet 12 Discharge port 13 Water level sensor 14 Flow control valve

Claims (2)

[Claims] 1. An instantaneous water heater in which tap water continuously supplied from a water inlet pipe is heated by a heating unit to supply hot water from a hot water supply port, wherein hot water heated by the heating unit is mixed with outside air. A mixing section that produces a gas phase due to the outside air,
And a volatilization tank for discharging the gas phase generated by the mixing section into the outside air, and harmful vaporized substances in the hot and cold water that have moved to the gas phase are discharged together with the gas phase by the volatilization tank, and after this discharge An instant purified water heater characterized in that hot water is supplied from the hot water supply port. 2. The tap water continuously supplied from the water inlet pipe is subjected to water purification treatment by a water purification treatment section composed of activated carbon and a hollow fiber membrane, and then heated by the heating section. Instant water purification water heater described in 1.