JPH03122455A - Hot-water supply apparatus with built-in filter - Google Patents

Abstract

PURPOSE:To remove filth from hot-water in a bathtub for controlling the contamination of hot-water by providing a filter on a pipeline which connects a circulation pump and an additional heating heat exchanger. CONSTITUTION:The hot-water fed into a bathtub B is supplied to a filter 13 by a circulation pump 12 to filter the hot-water. The hot-water after filtered is sent to an additional heating heat exchanger 4 where the hot-water is heated by heat exchange action, and supplied to the bathtub B. Thus, filth is removed from the hot-water in the bathtub B by the filter 13. Thereby, the contamination of the hot-water can be controlled.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a hot water supply device with a built-in filter, which uses a reheating heat exchanger in addition to a hot water supply heat exchanger when pouring hot water into a bathtub. In particular, the present invention relates to a water heater with a built-in filter that filters hot water through a filter during reheating.

[Conventional technology]

Generally, hot water poured into a bathtub tends to become polluted and become unclean. Therefore, after taking a bath, it is necessary to drain the hot water, clean the inside of the bathtub, and then refill the bathtub with fresh hot water, which is extremely wasteful.

In addition, the hot water poured into the bathtub is heated by the heat exchange action of the hot water supply heat exchanger, and is determined by the heat exchange capacity of the hot water supply heat exchanger, so if you try to increase the amount of hot water poured into the bathtub, This results in a decrease in heating efficiency, that is, a decrease in hot water temperature, and there is a limit to increasing the amount of hot water.

Therefore, it took a considerable amount of time to complete pouring.

The present invention has been made in view of these problems.

"Means for Solving the Problems" In order to solve the above-mentioned problems, the present invention provides a filter in the pipe line connecting the circulation pump and the reheating heat exchanger.

Further, in the present invention, heat exchange is performed using a hot water supply heat exchanger and a reheating heat exchanger, and hot water is poured into the bathtub.

[Effect]

Hot water poured into the bathtub is supplied to a filter by a circulation pump and filtered. After filtration, the hot water reaches the reheating heat exchanger, where it is heated by heat exchange and supplied to the bathtub. In this way, since dirt is removed from the hot water in the bathtub by the filter, contamination of the hot water can be suppressed.

Furthermore, when pouring hot water into the bathtub, a reheating heat exchanger is operated in addition to the hot water supply heat exchanger to perform heat exchange, so efficient heating is achieved.

Therefore, the amount of molten metal poured per unit time can be increased.
The time required for reheating is shortened.

[Example] Next, an example of a water heater with a built-in filter according to the present invention will be described with reference to the accompanying drawings.

It has a heat exchanger 4.

The hot water supply heat exchanger 2 includes a water supply pipe 5 and an inflow water amount detector 6.
and is connected to a mixing valve 7 that mixes the heated water and water. Furthermore, this mixing valve 7 is connected to the water supply pipe 5 via a water inlet branch pipe 8.

The mixing valve 7 branches off so that hot water is supplied to a shower or the like and a tank 3 open to the atmosphere. A hot water temperature detector 9 is provided near the mixing valve 7 to detect the temperature of hot water supplied to the tank 3 open to the atmosphere.

The tank 3, which is open to the atmosphere, stores a predetermined amount of hot water supplied through the mixing valve 7, and is equipped with a pole tap 10 for adjusting the water level. Connected via.

The filter 13 is connected to both ends thereof with three-way valves 15 and 16 for switching pipe lines.

The three-way valves 15 and 16 are controlled by switching (not shown).

In this case, the pipe line for filtration refers to the pipe line 17 leading from the circulation pump 12 to the three-way valve 16 and the pipe line 18 leading from the filter 13 to the reheating heat exchanger 4 via the three-way valve 15. The pipe line 17 and the pipe line 18 have a confluence point 19.

-Yoshi, the pipe line for backwashing water refers to the pipe line 20 leading from the circulation pump 12 to the three-way valve 15, and the pipe line 21 leading from the three-way valve 16 to the outside via the filter 13. .

Next, a branch pipe 22 is arranged in parallel with the pipe line leading from the confluence 19 of the pipe line 17 and the pipe line 18 to the outgoing pipe 14 via the reheating heat exchanger 4. A flow rate control valve 23 is interposed to control the amount of hot water passing through.

Opening/closing control is performed based on a detection signal from a hot water temperature detector 25 that detects the hot water temperature.

In the bathtub B, a detection tank 27 is provided with a water level switch 26 for detecting the water level of hot water in the bathtub B.

A return pipe 28 that returns hot water into the water heater 1 is attached to the bottom of the detection tank 27, and the circulation pump 1
A conduit is formed to reach No. 2.

The water heater 1 with a built-in filter according to the present invention is constructed as described above, and the operation of the water heater 1 will now be described.

First, the process of pouring hot water into bathtub B will be explained.

The water supplied from the water supply pipe 5 is adjusted to a predetermined water level by the valve opening/closing action of the pole tap 10.

Next, the hot water reaches the reheating heat exchanger 4 via the pipe 17, is further heated, and is poured into the bathtub B via the outgoing pipe 14.

Incidentally, when hot water is sent from the circulation pump 12, the filter 13 has a flow path formed so as to perform a filtration action or a backwash drainage action, but it may be in either operating state.

The filtration and backwash drainage functions of the filter 13 will be described later.

By the way, the hot water sent from the pipe 17 is supplied to the reheating heat exchanger 4 via the flowing water detector 24, heated, and reaches the outgoing pipe 14, while being branched via the flow rate control valve 23. An outgoing pipe 1 through which water is passed through a pipe 22 and a hot water temperature detector 25 is provided.
4.

In this case, if the amount of hot water supplied to the reheating heat exchanger 4 becomes excessive, the flow rate control valve 23 is controlled to open based on the signal related to the excessive amount of hot water detected by the flowing water detector 24. , an excessive amount of hot water will pass through the branch pipe 22.

The hot water heated by the reheating heat exchanger 4 and the branched hot water join together at the outgoing pipe 14. In this case, the temperature of the combined hot water is detected by the hot water temperature detector 25, and compared with the set hot water temperature, and the opening/closing control of the flow rate control valve 23 is performed based on a signal corresponding to the error.

In this way, hot water is poured into the bathtub B, so even if the amount of water flowing from the water supply pipe 5 is increased, the synergistic heat exchange action of the hot water supply heat exchanger 2 and the reheating heat exchanger 4 will cause the hot water to reach the bathtub B. This prevents the temperature from dropping and allows hot water to be poured at the set temperature.

When the water tank B reaches the predetermined water level, the water level switch 26 is turned on.
A signal relating to a predetermined water level is outputted, and this signal switches the three-way valve 11 to form a circulation path and starts reheating as necessary.

Hot water flows from the return pipe 28 to the circulation pump 12 via the three-way valve 11.
is supplied to the filter 13 and the reheating heat exchanger 4 under the operation of . Here, the state in which the filter 13 performs its filtering action will be explained based on FIG. 2.

The three-way valves 15 and 16 allow hot water to flow from the circulation pump 12 to the pipe line 17, the three-way valve 16,
It is switched to the reheating heat exchanger 4 via the filter 13, the three-way valve 15, and the pipe line 18. In this case, conduit 1
7 and the conduit 18 communicate with each other,
While the hot water is supplied to the filter 13, it is also supplied directly to the forced combustion heat exchanger via the confluence point 19. Furthermore, filter 1
The hot water that has passed through the three-way valve 15 and the pipe line 18 from 3 also flows to the confluence point 1.
9, and the hot water is sent to the reheating heat exchanger 4.

Here, floating matter contained in the hot water that has passed through the filter 13 is filtered out.

The hot water directly sent from the pipe 17 to the heat exchanger 4 for reheating still contains suspended matter, but during reheating, the hot water is circulated between the water heater 1 and the bathtub B by the circulation pump 12. Since the bathtub B is circulated, dirt such as floating objects is finally filtered out from the hot water in the bathtub B.

Next, the state in which the filter 13 is backwashed will be explained based on FIG. 3.

First, the three-way valves 15 and 16 are connected from the circulation pump 12 to the pipe line 20,
It is switched to form a flow path through the three-way valve 15, the filter 13, the three-way valve 16, and the conduit 21.

The hot water is passed from the circulation pump 12 through the pipe line 20, the three-way valve 15, the filter 13, the three-way valve 16, and the pipe line 21. As a result, suspended matter adhering to the element of the filter 13 is removed from the pipe line 21. is discharged to.

While performing a filtration action, by performing an appropriate backwashing action,
The filtering ability of the filter 13 will be maintained.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

■ Since a filter is provided in the pipe connecting the circulation pump and the reheating heat exchanger, dirt from the hot water in the bathtub is removed, and pollution of the hot water can be suppressed.

■ Reheating is performed by heat exchange between the hot water supply heat exchanger and the reheating heat exchanger, so efficient heating is achieved and a drop in hot water temperature can be prevented even when the amount of hot water poured is increased. It becomes possible to shorten the time until completion of pouring.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing one embodiment of a water heater with a built-in filter according to the present invention, FIG. 2 is a diagram illustrating a state in which the water heater shown in FIG. FIG. 2 is a diagram illustrating a state in which a backwashing action is performed in the hot water supply apparatus shown in FIG. 1. FIG. 1... Water heating device, 2... Heat exchanger for hot water supply, 3...
Atmospheric open type tank, 4... Heat exchanger for reheating, 5...
Water supply pipe, 6... Incoming water amount detector, 7... Mixing pulp, 8... Water inlet branch pipe, 9... Hot water temperature detector, 10
...Ball tap, 11...Three-way valve, 12...Circulation pump, 13...Filter, 14...Outgoing pipe, 15
．． 16...Three-way valve, 17° 18...Pipe line, 19...
・Confluence point, 20.21...pipeline, 22...branch pipe,
23... Flow rate control valve, 24... Flowing water detector, 25...
...Water temperature detector, 26...Water level switch, 27...
Detection tank, 28...Return pipe. Liaotu procedure amendment (method) % formula % Relationship to the case Patent applicant address 201 Nishiaibara Shinden, Fuji City, Shizuoka Prefecture Name Takagi Sangyo Co., Ltd. Representative Takagi-34, Agent 101-1 (294) 7341 ~
2 Address Room 901, Noah Otemachi Building, 1-21 Kanda Nishikicho, Chiyoda-ku, Tokyo Name (7110) Patent Attorney 3-2-5] 5.
Date of amendment order (R1 ``I'tl*''t''''':) 6, Item 7 of the title of the invention in the specification to be amended, Invention in the title of the invention in the description of contents of the amendment The name will be corrected as follows.

Claims (2)

[Claims] (1) Connect the bathtub, a circulation pump as a forced circulation means, and a heat exchanger for reheating through a pipe, and install a filter in the pipe that connects the circulation pump and the heat exchanger for reheating. A water heater with a built-in filter. (2) In the hot water supply device with a built-in filter according to claim 1, the heat exchanger for hot water supply is connected to the circulation pump by a pipe through an atmosphere-open type tank that temporarily stores hot water and maintains it at a predetermined water level. A water heater with a built-in filter, characterized in that heat exchange is performed by a hot water supply heat exchanger and a reheating heat exchanger, and hot water is poured into a bathtub.