JPS61259052A - Automatic hot water feed bath boiler - Google Patents

Abstract

PURPOSE:To make it possible to supply a suitable amount of hot water of a desired temperature in a short period of time by combining a bath boiler of the structure of a heat exchanger with an instantaneous water heater and providing water level sensors on the walls of outlet and inlet port water cans and a temperature sensor at the inlet water can of a circulation inlet pipe, and further providing a propeller type axial pump at one of the outlet and inlet port water cans. CONSTITUTION:When there is not residual hot water in the bathtub, and an automatic moving switch is turned ON in a state where a hot water feed plug 11 is closed, a hot water feeding electromagnetic valve 13 is opened, and a water flow is produced from a water feed circuit 35. Then, a water flow switch 37 detects it an electromagnetic valve 32 is opened, and a burner 25 for an instantaneous water heater is ignited. After the ignition, heat is absorbed by a heat absorbing fin 7, and heated hot water is introduced into a hot water feeding electromagnetic valve 13, a funnel 24, an outlet water can 21 and a heat transfer pipe 20, in this order, which are provided at one of the tip ends of a hot water feed pipe 10. Upon this occasion, by detecting opening of the hot water feed electromagnetic valve 13, a gas electromagnetic valve 34 for the bath boiler is opened, and simultaneously an igniter operates and a burner 26 for the bath boiler is ignited, and is reheated in a heat transfer pipe 20. Thus, hot water is fed into the bathtub from a circulation inlet pipe 15 via an intermediate water can 18, a rectangular pipe 17 and an inlet water can 16.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a combination of an instant water heater and a bath pot.The capacity of the bath pot is added to the capacity of the instant water heater to increase the capacity and produce hot water at an appropriate temperature. This relates to an automatic hot water bath pot that is poured into the bathtub (hereinafter referred to as pouring) and automatically stops when the appropriate amount is reached, and automatically stops when the temperature reaches the appropriate temperature when reheating the bath.

Conventional technology When pouring hot water into the bathtub, without adding to the capacity of the bathtub, water at an appropriate temperature heated by an instantaneous water heater is directly sent through the circulation outlet pipe of the bathtub and communicated with the bathtub heat exchanger. A water level sensor installed in the bathtub detects the amount of hot water in the bathtub and automatically stops pouring water when the appropriate amount is reached. The system then reheats the bathtub, detects the temperature of the water in the bathtub using a temperature sensor, and automatically stops reheating when the temperature reaches the appropriate temperature.

That is, as shown in FIG. 2, the hot water supply pipe 1 of the instantaneous water heater 2
A melt pouring pipe 14 is connected to one end of the melt pouring solenoid valve 13 at one end of the melt pouring pipe 14.
is provided, and the pouring pipe 14 is in open communication with a funnel 24 at the tip of a riser pipe 23 provided vertically from the circulation outlet pipe 22 of the bath pot 3. A forced circulation device includes a water level sensor 29 in the water can part 28 of the bathtub 3, and a circulation pump 42 in which a discharge pipe 40 and a suction pipe 41 are inserted in the circulation inlet and outlet pipes 22.15 in a double-tube shape. It's a money-making structure. (For example, Japanese Utility Model Application Publication No. 59-133942) Problems to be Solved by the Invention In the prior art described above, when taking a bath, hot water is first poured at a certain temperature, and after the pouring is completed, the desired hot water temperature is adjusted. The structure is such that it reheats until the temperature is reached. In this case, the sum of the time for pouring hot water and the time for reheating the bath becomes the waiting time when taking a bath, which takes a long time.

- Examples include:

<Desired water temperature: 43℃, Desired amount of hot water: 180t> In other words, it takes about 20 minutes? :It will take a while.

On the other hand, in order to shorten the waiting time, it is possible to increase the pouring capacity and realize a configuration that can pour hot water at a desired temperature, which can significantly shorten the waiting time. - Examples include:

<Desired hot water temperature: 43℃, Desired amount of hot water: 180/>Rimari, it becomes necessary to increase the capacity (or hot water pouring capacity) of the instantaneous water heater from size 17 to size 23, by 6 sizes. .

As described above, as the instantaneous water heater becomes larger, the size of the device becomes larger, which goes against the need for space saving, and there is a problem in that the cost of the device also increases.

Furthermore, when reheating, forced convection is performed using a circulation pump to eliminate the temperature difference between the top and bottom inside the bathtub, but in the conventional technology's operation sequence, the circulation pump is operated both when pouring hot water and when reheating. Therefore, in order to ensure the longevity of the circulation pump, it is necessary to select a high-cost one.

The present invention does not require increasing the capacity of the instantaneous water heater (for example, 17
By increasing the capacity of the bath kettle and increasing the flow rate of hot water, it is possible to pour hot water at the desired temperature, thereby shortening the waiting time when taking a bath. be. Furthermore, this eliminates the need to reheat the bath after the completion of pouring, which reduces the number of cases of reheating the bath by half, making it possible to select a circulation pump that uses a low-cost motor.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention combines a bathtub having a heat exchanger configuration with a riser pipe having a funnel at the tip and an instantaneous water heater, and provides an instantaneous water heater. One of the hot water supply pipes is branched into a hot water outlet pipe with a hot water tap, the other is branched into a hot water pouring pipe with a solenoid valve for hot water supply, and the enema pipe is connected to the funnel by opening, and the heat exchanger is connected to the circulation inlet pipe and the inlet pipe. The water container section, the rectangular pipe, the intermediate water container section, the heat transfer tube, the outlet water container section, and the circulation outlet pipe are connected in this order, and the downstream end of the riser pipe is arranged opposite to the heat transfer tube via the outlet water container section. At the same time, a water level sensor is installed on one wall of the inlet/outlet water can part, a temperature sensor is installed in a part of the inlet water can part near the circulation inlet pipe, and a propeller type sensor is installed in one of the inlet/outlet water can parts. The system is equipped with an axial flow pump.

Function When pouring hot water into the bathtub, the hot water obtained from the instantaneous water heater is sent to the heat exchanger tube through the outlet water can of the bathtub heat exchanger and reheated by the heat exchanger tube. , an intermediate water can, a rectangular pipe, an inlet water can, and a circulation inlet pipe into which hot water is poured into the bathtub. (However, as the water level in the bathtub rises, hot water will be poured from the circulation outlet pipe.) At this time, a temperature sensor controls the capacity of the instantaneous water heater to pour hot water at the desired pouring temperature, and a water level sensor stops pouring at the desired pouring amount (water level). .

As a result, the capacity can be increased to pour hot water at a desired temperature, thereby shortening the time it takes to take a bath, and the pouring of hot water automatically stops when the appropriate amount is reached. moreover,
When reheating, the temperature of the water in the bathtub is made uniform by stirring with an axial flow pump, and the water temperature is automatically stopped at the desired temperature based on detection by a temperature sensor.

Embodiment An embodiment of the present invention will be explained based on FIG. In the figures, the same parts as those in the conventional example shown in FIG. 2 are given the same numbers.

In FIG. 1, an automatic hot water bath pot 1 of the present invention combines an instantaneous water heater 2 and a bath pot 3. The instantaneous water heater 2 is composed of a drum part 5 having a drum pipe 4, a fin vibro, and a fin block 8 having an endothermic fin 7, and a water supply pipe 9, a drum pipe 4, a fin vibro, and a hot water supply pipe 10 are connected to each other. . The distal end of the hot water supply pipe 10 is branched into a hot water tapping pipe 12 having a hot water tap 11 and a hot water pouring pipe 14 containing a solenoid valve 13 for pouring hot water.

The bath pot 3 has a circulation inlet pipe 16, an inlet water can part 16, and a rectangular pipe 1.
7. Heat exchanger tube 2 having intermediate water can part 18 and heat absorption fins 19
0, the outlet water can part 21, and the circulation outlet pipe 22 are arranged in this order. The downstream tip of the riser pipe 2a is connected to the side wall of the outlet water can section 21, and the heat transfer tube 20 is also connected to the other side wall of the outlet water can section 21, and the tip and the heat transfer tube 20 are disposed opposite to each other. . Further, the upstream end of the riser pipe 2a extends vertically to a higher position than the instantaneous water heater 2 and the bath pot 3, and is provided with a funnel 24 at the tip. The pouring pipe 23 is in open communication with the funnel 24.

The water level sensor 29 is provided in communication with the outlet water can part 21,
The temperature sensor 30 is provided near the circulation inlet pipe 15 of the inlet water can section 16. Furthermore, the circulation pump 42 is connected to the outlet water can section 2.
1 is provided at a position opposite to the circulation outlet pipe 220, and the propeller 43 at the tip faces the inside of the circulation outlet pipe 22, making it a trickle type pump.

One side of the fuel circuit 31 is connected to the burner 25 for the instant water heater via the Sumi magnetic valve 32 and the proportional control valve 33, and the other side is connected to the burner 25 for the bath kettle via the Sumi magnetic valve 34. I am contacting 26. The water supply circuit a5 is filled with water from the vana 36,
It is connected to the water supply pipe 9 of the instantaneous water heater 2 via a running water switch 37, and a temperature sensor 38 is provided in the water supply pipe 10 provided on the downstream side of the FinVibro.

Further, the automatic hot water supply bath pot 1 separates the instantaneous water heater @ 2 from the bath pot 3 by a partition plate 27, and has an electric controller 39 built therein.

The present invention has the above-described configuration, and its operation will be explained next. When pouring hot water at an appropriate temperature into the bathtub, if there is no remaining hot water in the bathtub and the hot water tap 11 is closed, turn on the automatic operation switch (not shown), the solenoid valve 1 for pouring hot water will turn on.
3 is opened, water flows from the water supply circuit 35, the water flow switch a7 detects it, the electric controller a9 operates, the instantaneous water heater valve 32 opens, and at the same time, the igniter (not shown) is activated. The instantaneous water heater burner 25 is ignited. After ignition, heat is absorbed by the heat absorbing fins 7, and the solenoid valve 13 for pouring hot water at one end of the hot water supply pipe 10, the pouring pipe 14, the funnel 24, the riser pipe 23, the outlet water can part 21, and the heat transfer tube 20 are heated in this order. The heated hot water is pumped in. At this time, by detecting the opening of the solenoid valve 1a for pouring hot water, the solenoid valve 34 for the bath kettle opens, and at the same time, the igniter is activated and the burner 26 for the C bath kettle is ignited. The hot water is reheated in the heat pipe 20 and then poured into the bathtub from the circulating inlet pipe 15 via the intermediate water can part 18, the rectangular pipe 17, and the inlet water can part 16.

At this time, the temperature sensor 30 sends a signal to the proportional control valve 33 of the instantaneous water heater 2 via the electric controller 29 so that the pouring temperature reaches the desired temperature, and adjusts either the rated capacity or the TDR capacity. The controller is configured to select from 1-0-r.

In this way, hot water at the desired temperature accumulates in the bathtub at a large capacity and large flow rate, which is a combination of the instantaneous water heater and the bath pot, and when the hot water in the bathtub reaches the desired amount (water level), the water level sensor 29
is activated, the solenoid valve 13 for pouring hot water is closed, and the water supply circuit 35 is closed.
water flow stops, the instantaneous water heater gas solenoid valve 32 closes, the instantaneous water heater burner 26 extinguishes the water, and at the same time the hot water pouring solenoid valve 13 closes, the bath pot gas solenoid valve 34 closes and The kettle burner 26 will also be extinguished.

In other words, just by turning on the automatic operation switch, the bathtub will be filled with just the right amount of hot water at the right temperature in a short time.

When realizing this pouring configuration, simply use the instantaneous water heater 2.
This cannot be achieved simply by passing the hot water through the bathtub heat exchanger 3. For example, (1) it is assumed that the heat exchanger configuration is such that the amount of heat transferred within the heat exchanger tubes 20 can be obtained as predicted. This clarifies the pouring flow rate and the capacity of the bath pot.
By knowing the heat exchange efficiency, it is possible to predict the temperature of the water poured into the bathtub from the circulation inlet/outlet pipe. (i
i) In the bath kettle heat exchanger 3, when heating the bath (described later), water flows from the circulation inlet pipe 15 and convects toward the circulation outlet pipe 22, but when pouring, the flow is reversed, that is, from the heat transfer pipe 20. Convection flows toward the circulation inlet pipe 15, and the premise is that the water flow circuit in the heat exchanger 3 has a series configuration.

Unless the above prerequisites are satisfied, it will not be possible to pour the metal at an appropriate temperature and to minimize the occurrence of the kettle rattling phenomenon. On the other hand, as shown in the embodiment, all of the hot water sent from the riser pipe 23 passes through the heat transfer tube 20 during pouring, and the circulation outlet pipe 22 and the outlet water can part 21 , the heat transfer tube 20, the intermediate water can section 18, the rectangular tube 17, the inlet water can section 16, and the circulation inlet tube 15 are arranged in series in this order, so that the above prerequisites are satisfied.

In the case of shirt hot water supply, when the tap 11 is opened, water starts flowing from the water supply circuit 35, and hot water is supplied from the hot water tap 11 in the same manner as the instantaneous water heater 2 operates when pouring hot water. . At this time, a signal is sent to the proportional control valve 33 via the electric controller 29 so that the hot water temperature at the temperature sensor a8 reaches the desired temperature. You can supply hot water at a suitable temperature.

Furthermore, even when the hot water tap 11 is opened for Java hot water supply when pouring hot water into the bathtub, the hot water supply pipe 10 is branched into the hot water pouring pipe 14 via the hot water tap pipe 12 and the solenoid valve 13 for pouring hot water. This configuration allows simultaneous use of hot water supply and pouring.

Furthermore, when heating the bath, the solenoid valve 13 for pouring hot water and the tap 11 for hot water tap are closed, and when the bath operation switch (1 not shown) is turned on, the diagonal solenoid valve for the bath pot opens. The bath burner 26 is ignited in the same manner as when pouring hot water. After ignition, heat is absorbed by the heat absorbing fins 19 and the water or low-temperature hot water in the heat transfer tube 20 is heated, and in a flow opposite to that during pouring, the water is circulated through the circulation inlet tube 15, the inlet water can section 16, the rectangular tube 17, and the intermediate water. can part 18,
Heat exchanger tube 20, convection circulation outlet tube 2 toward outlet water can section 21
2, the heating is circulated towards the bathtub.

At this time, the axial flow circulation pump 42 is started at the same time as the bath operation switch (not shown) is turned on, and forced convection is caused from the circulation inlet pipe 15 toward the circulation outlet pipe 22.

In this case, in a heat exchanger configuration in which a plurality of heat transfer tubes 29 are disposed in the balun I as seen in the prior art, drift tends to occur in the flow. When a biased flow occurs, a distribution occurs in the amount of heat transferred in each heat transfer tube 29, but in the heat exchanger configuration shown in the embodiment, the water flow circuit is in series from the circulation inlet tube 15 to the circulation outlet tube 22. It is established by the fact that

This eliminates the temperature difference between the top and bottom inside the bathtub, and also makes it easier to rotate the propeller part of the axial flow circulation pump at high speed inside the circulation outlet pipe, improving heat exchange efficiency and improving the temperature during bathing. By increasing the flow rate during reheating, hot water with a small rise in temperature is sent into the bathtub, which reduces discomfort and allows for comfortable reheating.

Effects of the invention (i) The hot water obtained by the instantaneous water heater is reheated by the heat exchanger of the bathtub and then poured into the bathtub, which increases the pouring capacity and allows the desired amount to be reached in a short time. You can pour an appropriate amount of hot water at the appropriate temperature.

(11) Rather than increasing the hot water pouring capacity by combining an instantaneous water heater with a larger capacity and a bath pot, the hot water pouring capacity is increased by combining the capacities of an instantaneous water heater and a bath pot. Compared to the former, the device size is more compact, and the device cost can be lowered.

(fit) By increasing the pouring capacity, the setting range of pouring temperature can be expanded. Therefore, throughout the year, the temperature is high in the winter (e.g. 43-44℃) and the temperature is low in the summer (e.g. 37℃).
It is possible to freely set the pouring temperature (~38℃), making it easier to use.

Kan: It is extremely convenient because just by turning on the automatic operation switch, it automatically pours the desired amount of hot water so that you can take a bath for a short time.

(V) Since the circulation pump is not started during pouring, reliability over the life of the circulation pump is improved, and a low-cost circulation pump can be selected.

[Brief Description of the Drawings] Fig. 1 is a perspective view of an automatic hot water bath pot according to an embodiment of the present invention;
FIG. 2 is a perspective view of a conventional example. 1... Automatic hot water supply bath pot, 2... Instant water heater, 3... Bath pot, 10... Hot water supply pipe, 13...・Solenoid valve for pouring molten metal, 14...Mold pouring pipe, 15...Circulation inlet pipe, 16...Inlet water can section, 20...Heat transfer tube, 21...
Outlet water can part, 22... Circulation outlet pipe, 23...
... riser pipe, 25... burner for instantaneous water heater,
26...Bath pot burner, 29...Water level sensor, 30...Temperature sensor, 39...
...Electric controller, 42...Axial flow circulation pump, 4
3...Propeller.

Claims (1)

[Claims] A combination of a bathtub with a heat exchanger configuration and an instantaneous water heater equipped with a riser pipe with a funnel at the tip, one of the hot water supply pipes of the instantaneous water heater is connected to the hot water outlet pipe with a hot water tap, and the other is used for pouring hot water. The pouring pipe is branched into a pouring pipe having a solenoid valve, and the pouring pipe is connected to the funnel through an opening, and the heat exchanger is connected to a circulation inlet pipe, an inlet water can section, a rectangular pipe, an intermediate water can section, a heat transfer tube, and an outlet. The water container section is connected to the circulation outlet pipe, and the downstream side of the riser pipe is arranged opposite to the heat transfer tube via the outlet water container section, and a water level sensor is installed on one wall of the inlet/outlet water container section, An automatic hot water bath kettle which is provided with a temperature sensor in a part of the inlet water can near the pipe and an axial flow pump in one of the inlet and outlet water can parts.