JPH04148153A - Hot water supplying apparatus for bathtub - Google Patents

Abstract

PURPOSE:To improve hot water supplying preformance by a method wherein an opening degree of an opening/closing means which opens and closes a hot water supply passage to interrupt feeding of hot water is provided changeably, and a water supply control part controls the opening/closing means so that the higher a target temperature is, the smaller hot water supplying rate. CONSTITUTION:A hot water supplier 1 which operates to heat in response to feeding of hot water to a hot water supply passage 7 which is connected to a bath tub 8 is provided with a water heating heat exchanger 2, a burner 3, a burner controller 4 which controls heating volume so that water supplying temperature reaches a commanded target temperature, and a frame rod 9. A three-way valve 10 is provided in the hot water supply passage 7, so that hot water path can be turned over to a first flow passage 7A or a second flow passage 7B. A bath operator 20 commands a target temperature to the burner controller 4, and further controls opening and closing of the three-way valve 10. By this, when the target temperature is high, the supplied water volume is reduced so that necessary heating volume does not exceed capacity of time hot water supplier 1, while when the target temperature is not high, the supplied water volume is increased to save time required for hot water supply.

Description

[Detailed Description of the Invention] [Field of Industrial Application] 9 The present invention provides a water heater that heats up in response to sending hot water to a hot water supply path connected to a bathtub, so that the water supply temperature reaches a commanded target temperature. A hot water supply control unit is provided to control the amount of heating so that the hot water supply path is opened and closed, and an opening/closing means for opening and closing the hot water supply path to intermittently supply hot water; The present invention relates to a hot water supply device for a bathtub, in which a hot water supply control unit for supplying hot water to the bathtub is disposed outside the water heater.

[Conventional technology]

There are two types of means for opening and closing the hot water supply path: a type with a manual on-off valve (hereinafter referred to as the "manual type") and a type with an automatic on-off valve such as an electric valve (hereinafter referred to as the automatic type). .

Although the water heater for a bathtub as described above is an automatic type, the water heater can also be used as a manual type by arranging an opening/closing means and the like outside the water heater.

By the way, it is thought that in the hot water supply device for a bathtub as described above, it is common to keep the opening degree of the opening/closing means constant.

[Problem to be solved by the invention]

There are two ways to supply hot water to a bathtub: hot water supply for hot water supply and reheating hot water supply, and the hot water temperature for reheating hot water supply is usually much higher than that for hot water supply for hot water supply.

If the opening degree of the opening/closing means is constant as in the above prior art,
The following problems occur.

If the opening degree is large, the amount of heat required for reheating hot water may exceed the capacity of the water heater, and there is a risk that the hot water temperature or target temperature may not be reached.

On the other hand, if the opening degree is small, the amount of hot water supplied per unit time will be small, and it will take a long time to fill and heat hot water.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned conventional drawbacks and improve the hot water supply capacity of a hot water supply device for a bathtub.

[Means to solve the problem]

In order to achieve this object, a first characteristic configuration of the hot water supply device for a bathtub according to the present invention is that the opening/closing means is provided to be able to freely change the degree of opening, and the hot water supply control section instructs the hot water supply control section. The opening degree of the opening/closing means is adjusted so that the amount of hot water supplied to the bathtub decreases as the target temperature increases.

A second characteristic configuration is that a temperature detection means for detecting the temperature of hot water in the hot water supply path is provided, and the hot water filling control section is configured to control the temperature detected by the temperature detection means to be lower than a set temperature after starting hot water supply to the bathtub. In this case, the opening degree of the opening/closing means is adjusted to the closing side by a set amount every time a set time elapses.

A third characteristic configuration is that, even if the opening degree of the opening/closing means is adjusted to the lower limit of the opening adjustment range, if the detected temperature is less than the set temperature, the hot water filling control section closes the opening/closing means and closes the opening/closing means. The bathtub is configured to stop supplying hot water to the bathtub.

[For production]

In the first characteristic configuration, when the target temperature is high, such as during reheating hot water supply, the amount of hot water supplied can be reduced to prevent the required heating amount from exceeding the capacity of the water heater. On the other hand, when the target temperature is not high, such as in hot water supply, the amount of hot water supplied can be increased to shorten the time required for hot water supply.

In winter, etc., the temperature of the water supplied to the water heater decreases, so it is thought that the water supply temperature may not reach the target temperature. Second
With the characteristic configuration, in such a case, the hot water supply temperature can be brought closer to the target temperature by reducing the opening degree.

In the third characteristic configuration, it is possible to prevent cold water from flowing into the bathtub in the event that the water heater misfires.

〔Effect of the invention〕

In the first characteristic configuration, the capacity of the water heater can always be utilized to the maximum by adjusting the amount of hot water supplied according to the target temperature, and in the second characteristic configuration, according to the detected temperature. can. Therefore, the performance of the water heater for a bathtub can be improved.

With the third characteristic configuration, the comfort of the hot water supply device for a bathtub can be improved without giving the user discomfort such as the feeling of cold water.

〔Example〕

Embodiments of the present invention will be briefly described below with reference to the drawings.

As shown in Figure 1, the hot water supply path (
7) A water heater (1) that heats up in response to sending hot water to
Or is provided.

To explain the water heater (1), it includes a water heating heat exchanger (2), a burner (3), and a burner controller as a hot water supply control unit that controls the amount of heating so that the hot water temperature reaches a commanded target temperature. (4), and a frame rod (9).

A water flow sensor (
6) is attached, and the hot water supply path (7) is opened and the water supply pressure starts sending hot water from the heat exchanger (2) to the hot water supply path (7), and as a result, the water supply path (5) starts to flow. When a flow occurs and the water amount sensor (6) enters the water amount detection state, in response to this, the burner controller (4) ignites the burner (3) to start the heating operation of the water heater (1), and 1. Hot water supply path (7
) is closed and the supply of hot water to the hot water supply path (7) is stopped,
As a result, when the water flow in the water supply channel (5) stops and the water flow sensor (6) goes into a water flow non-detection state, the burner controller (4) extinguishes the burner (3) in response to this and turns off the water heater. It is configured to stop the heating operation (1).

In addition, the control of the hot water temperature by the burner controller (4) is as follows.
This is executed by detecting the hot water temperature using a thermistor or the like and adjusting the combustion amount of the burner (3) so that the temperature reaches the target temperature.

The hot water supply path (7) is provided with a three-way valve (10) as an opening/closing means for intermittent delivery of hot water, and the hot water supply path to the bathtub (8) is connected to a first flow path (7A) and a second flow path (7B). It is configured so that it can be switched between. The first constant flow valve (IIAX 81!/m1n) is connected to the first flow path (7A) and the second flow path (7B
) are each provided with a second constant flow valve (IIBX 51 /m1n). In other words, the opening degree of the hot water supply path (7) can be changed. In the figure (12) is a vacuum breaker. Furthermore, the hot water supply path (7) has a branch hot water supply path (
13) are branch-connected.

The branch hot water supply path (13) is connected to the manual on-off valve (1) in the kitchen (K).
4), and the shower mixing valve in the bathroom (R) (
15) respectively.

The bathtub (8) is equipped with a bathtub thermistor (16).

The bathroom (R) has a bath controller (20), and the kitchen (K
) are each provided with a general operation device (21) and connected to the burner controller (4).

As shown in Fig. 2, the bath controller (20) includes an operation switch (22), an operation lamp (23), and a combustion lamp (
33), hot water temperature setting section (24) for setting the target temperature in the hot water supply path (7), manual switch (25), reheating switch (26), automatic switch (27), heat retention switch (28)
), a setting device (29) for setting the reservation time, etc., a display section (30) for displaying the time, etc., 3 refiring lamps (31)
, and first to third mode lamps (32A).

(32B) and (32C) are provided.

The bath operating device (20) commands the target temperature to the burner controller (4), and also controls the three-way valve (10).
It is designed to control opening and closing.

In other words, the bath operating device (20) corresponds to the hot water filling control section.

The general operation device (21) is also provided with a temperature setting section (34) for setting a target temperature in the branch water supply path, a priority changeover switch (35), and a changeover lamp (36).

The target temperature of the burner controller (4) is basically the command temperature from the bath controller (20), or when the priority changeover switch (35) is in the ON state, the general controller (21) The temperature is set to be the commanded temperature from To explain, when the priority changeover switch (35) is turned on while hot water is being supplied to the bathtub (8), an interrupt signal is transmitted to the bath operating device (20). Bath controller (
20) closes the three-way valve (10) and stops supplying hot water to the bathtub (8) when an interrupt signal is detected. Then, the hot water at the temperature set by the general operation device (21) or the branch hot water supply path (13).
).

Further, if a misfire occurs in the water heater (1) while supplying hot water to the bathtub (8), it is detected by the frame rod (9) and a misfire signal is transmitted to the bath operating device (20). When the bath operating device (20) detects a misfire signal, it closes the three-way valve (10) and stops supplying hot water to the bathtub. For hot water supply to the bathtub (8), manual mode, automatic hot water filling mode, heat retention mode,
There are also four reheating modes. Respectively, manual switch (25), automatic switch (27), heat retention switch (28)
), each mode is activated by turning on the additional firing switch (26).

In either mode, the amount of hot water supplied to the bathtub (8) after opening the three-way valve (10) and starting hot water supply is integrated and displayed on the display section (30). By the way, the amount of hot water supplied is calculated using the constant flow valve (IIA), (IIB
), the amount of hot water supplied per unit time is assumed to be constant, and is converted by multiplying it by the hot water supply time.

Note that when hot water supply is temporarily stopped due to an interrupt signal or a misfire signal, the amount of hot water supplied at that time is stored. Then, when both signals are canceled and hot water supply is restarted, integration is restarted using the stored hot water supply amount as an initial value.

By the way, in manual mode and automatic hot water filling mode, the target hot water temperature that the bath operating device (20) commands to the burner controller (4) is the temperature set in the hot water temperature setting section (24), or is the temperature set in the hot water temperature setting section (24), In mode and heat retention mode, the temperature is preset internally (for example, 80° C.).

Next, the operation of the bath operating device (20) will be explained based on FIGS. 3(a) to 3(f).

When the operation switch (22) is turned on, the control operation starts, and each switch (25), (26).

The system waits for operations (27) and (28). At this time, the current time is displayed on the display section (30), and the mode lamps (32A), (32B), and (32C) are off.

When the manual switch (25) is turned on, the mode becomes manual mode.

In manual mode, as shown in Figure 2 (σ) and (to),
A hot water supply time (for example, 1 hour) corresponding to a preset upper limit hot water supply amount is set, and the first flow path (
Hot water supply continues via step 7A).

When the automatic switch (27) is turned on, the automatic hot water filling mode is entered.

In the automatic hot water filling mode, as shown in FIGS. 3(c) and 3(f), first, a reservation is made for the time to start hot water supply. next,
If necessary, set the amount of hot water and set the clock.

After these settings, the current time is displayed on the display section (30), and the device waits until the reserved time with the first mode lamp (32A) lit. However, if the automatic switch (27) is further turned on in this state, the automatic hot water filling mode is canceled. When the reserved time comes, hot water is supplied through the first flow path (7A) until the set time has elapsed.

When the reheating switch (26) is turned on, the reheating mode is activated.

In reheating mode, as shown in Figure 3 (D) and (F),
The internal set temperature (80°C) is commanded as the target hot water temperature.

Then, the bath water temperature (To) is the reheating temperature (T, 1ΔT)
Hot water is supplied via the second flow path (7B) until the water exceeds Here, the reheating temperature is the initial bath water temperature (T1) and the heating temperature (Δ
T). The heating temperature (△T) varies by 1°C from +1 to +3°C depending on the number of times the reheat switch (26) is operated.
It can be set individually.

When the heat retention switch (28) is turned on, the heat retention mode is entered.

In the heat retention mode, as shown in Figure 3 (main) and (f), when the bathtub water temperature (To) becomes lower than the initial bathwater temperature (T1) by a set value (for example, 1°C) or more, the bathtub water temperature (To) changes. Hot water is supplied through the second flow path (7B) until the initial bath water temperature (T1) is exceeded. This operation is controlled by the heat retention switch (28).
Repeat until FF is achieved.

That is, in the reheating mode or heat retention mode where the target temperature is higher than the manual mode or automatic hot water filling mode, the amount of hot water supplied to the bathtub (8) is reduced.

[Another example]

In the above embodiment, the opening/closing means (10) is operated based on the target temperature.
In addition, we have shown the case where the opening degree of the hot water supply path (7) is adjusted.
) The opening degree of the opening/closing means (10) may be adjusted based on the temperature of the hot water in the opening/closing means (10).

As shown in FIG. 4, the hot water supply path (7) is equipped with a variable flow electric valve (10°) as an opening/closing means and a thermistor (17) for the hot water path as a temperature detection means.

The flow rate of the electric valve (10”) is 8I!/min, 6.5
It is assumed that the speed can be changed to three stages: 1/min, 5A'/min.

The operation in this configuration will be explained based on FIG. 5, taking the reheating mode as an example.

As in the previous embodiment, in principle, the bath water temperature (To)
Hot water is supplied until the temperature exceeds the reheating temperature (T1+ΔT). However, if the detected temperature (TL) of the hot water supply path thermistor (17) is below the set temperature (for example, 70°C) after hot water supply starts,
It is configured to adjust the opening degree of the electric valve (10°) to the closing side by a set amount every time a set time (for example, 30 seconds) elapses. Further, even if the opening degree of the electric valve (10") is adjusted to the lower limit of the opening adjustment range (here, 51!/m1n), if the detected temperature (TL) is less than the set temperature, the electric valve ( 10') is closed to stop supplying hot water to the bathtub (8).

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the hot water supply device for a bathtub according to the present invention,
Fig. 1 is a schematic diagram of the overall configuration, Fig. 2 is a front view of the bath operating device, Fig. 3 (A) to (F) are flowcharts of control operation, and Fig. 4 is an overall configuration diagram of another embodiment. FIG. 5 is a flowchart of the control operation. (1)...Water heater, (4)...Hot water supply control section, (7)...Hot water supply path, (8)......
Bathtub, (10)...Opening/closing means, (17)...
... Temperature detection means, (20) ... Hot water filling control section, (TL) ... Detection temperature.

Claims (1)

[Claims] 1. A water heater (1) that heats in response to hot water being sent to a hot water supply path (7) connected to a bathtub (8) so that the hot water temperature reaches a commanded target temperature. A hot water supply control unit (4) for controlling the heating amount is provided, and a target temperature is commanded to the opening/closing means (10) for opening and closing the hot water supply path (7) to intermittently supply hot water, and to the hot water supply control unit (4). and the opening/closing means (10
) is a hot water supply device for a bathtub disposed outside the water heater (1), and a hot water supply control unit (20) that controls opening and closing of the bathtub (8) to supply hot water to the bathtub (8); Means (10) is provided to freely change the degree of opening, and the hot water filling control section (20) reduces the amount of hot water supplied to the bathtub (8) as the target temperature commanded to the hot water supply control section (4) increases. A water heater for a bathtub, which is configured to adjust the opening degree of the opening/closing means (10) so that the opening/closing means (10) is opened. 2. The hot water supply device for a bathtub according to claim 1, further comprising temperature detection means (1) for detecting the temperature of hot water in the hot water supply path (7).
7), and the hot water filling control section (20) controls the temperature detecting means (17) after starting hot water supply to the bathtub (8).
) is less than a set temperature, the hot water supply device for a bathtub is configured to adjust the opening degree of the opening/closing means (10) to the set amount closing side every time a set time elapses. 3. The hot water supply device for a bathtub according to claim 2, wherein the hot water filling control section (20) is configured to control the detection even if the opening degree of the opening/closing means (10) is adjusted to the lower limit of the opening adjustment range. Warm (T_L)
A hot water supply device for a bathtub, which is configured to close the opening/closing means (10) and stop supplying hot water to the bathtub (8) when the temperature is lower than a set temperature.