JP3644088B2 - Hot water supply device with automatic bath water supply function - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water supply device with an automatic bath hot water supply function having an automatic bath hot water supply function.
[0002]
[Prior art]
Conventionally, hot water heated with heat exchange cans can be introduced into the bathtub by dropping hot water from the hot water supply circuit through the automatic hot water supply pipe into the bath recirculation circuit and the hot water supply device with automatic bath water supply function. Is provided. In addition, using the bath automatic hot water supply function, water from the water supply or the like can be automatically heated to the bathtub through the bath automatic hot water supply pipe without heat exchange heating or slightly heated, and the bath temperature is set higher than the bath set temperature. There has been provided a hot water supply device with an automatic bath hot water supply function that can perform a bath slimming operation that is adjusted to a slightly lower temperature.
[0003]
[Problems to be solved by the invention]
However, in the hot water supply device with automatic bath water supply function that enables the conventional bath slimming operation, when the bath slimming operation is instructed by a remote control or the like, the incoming water temperature is detected after the current bath slimming operation command, and the incoming water temperature And the bath set temperature, the required amount of water was calculated so that the bath temperature would be a little lower than the bath set temperature, and automatic dropping was performed. For this reason, in the case where after-boiling water has entered the vicinity of the incoming water temperature sensor after the end of the previous hot water supply operation etc., the incoming water temperature detected after the bath slimming operation command becomes higher than the actual incoming water temperature. There is a problem that the required amount of water to be dropped cannot be calculated accurately.
Conventionally, even if the detected incoming water temperature is higher than the bath setting temperature, for example, it has been configured to automatically drop up to 20 liters, so the bath temperature rises instead by bath slimming operation There was also.
[0004]
Therefore, the present invention solves the above-mentioned problems of the conventional apparatus, reliably prevents the bath temperature from rising in the bath slimming operation, and avoids the influence of after-boiling due to the previous operation, and the required amount of dropped water. An object of the present invention is to provide a hot water supply device with a bath automatic hot water supply function capable of accurately calculating the temperature.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the hot water supply apparatus with automatic bath hot water supply function of the present invention introduces water from the water supply to the heat exchange can body, heats the heat exchange without heating, or heats the hot water supply circuit. It is a hot water supply device with automatic bath hot water supply function that can be automatically dropped into the bath recirculation circuit via the hot water supply pipe and introduced into the bathtub. If the bath warming operation to adjust to a slightly lower temperature is commanded, the final incoming water temperature in the previous hot water supply operation detected and stored in advance is compared with the bath set temperature in this hot water supply operation. If the final incoming water temperature of the hot water supply operation is lower than the bath setting temperature of the current hot water operation, the bath temperature is lowered to a temperature that is a certain temperature lower than the bath setting temperature of the current hot water operation. A mechanism that does not drop when the final incoming water temperature of the previous hot water supply operation is equal to or higher than the bath set temperature of the current hot water supply operation. This is the first feature.
Further, the hot water supply device with automatic bath water supply function of the present invention is characterized in that, in the first feature, as the mechanism of the control unit, when the final incoming water temperature of the previous hot water supply operation is equal to or higher than the bath set temperature of the current hot water supply operation, A second feature is that the mechanism is configured to drop a small amount of water that can replace the water in the water intake pipe with new water without heat exchange heating.
[0006]
In the first feature of the present invention, in the bath warming operation, the temperature is set to a temperature lower than the bath set temperature by a certain temperature. The constant temperature can be set to 1 ° C., for example, but 0.5 ° C. or more. The temperature of 2 to 3 ° C. or less can be appropriately selected in advance.
Further, in the second feature of the present invention, the small amount of constant water that can replace the water in the water inlet pipe with new water is, for example, a flow rate of about several liters or less, but is appropriate depending on the type and scale of the device. A suitable amount of water can be selected in advance by experiments.
In the above, the hot water supply operation includes not only supplying water from the water supply to the heat exchanger and supplying it with hot water heated by heat exchange, but also supplying water without heat exchange heating. Including slimy operation.
In the feature of the present invention, the final incoming water temperature of the previous hot water supply operation is detected and stored in advance, and when the bath slimming operation is commanded, the final incoming water temperature of the previous hot water supply operation is used to Since the comparison is made with the set temperature, it is possible to calculate using the incoming water temperature without the influence of post-boiling or the like. Of course, the detection time goes up in the past than the current bath slimming operation, so it is not necessarily the same as the current incoming water temperature, but the effect of post-boiling is eliminated and the exact amount of drop is calculated accordingly. It becomes possible.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments.
FIG. 1 is an overall configuration diagram of a one-can two-circuit type hot water supply apparatus showing an embodiment of a hot water supply apparatus with a bath automatic hot water supply function of the present invention, and FIG. 2 is a flowchart showing a control mechanism of a bath warming operation by a control unit.
[0008]
The whole structure of the 1 can 2 circuit type hot water supply apparatus is demonstrated along FIG. Reference numeral 10 denotes a single can / two-circuit heat exchange can body, which includes one blower fan 11 and one burner 12. The burner 12 includes a fuel spray nozzle 12a, an igniter 12b, and the like. Fuel is supplied to the spray nozzle 12a by a supply pump 12c via a supply control valve 12d.
In the upper space in the heat exchange can 10, a heat exchanging portion 20 a of the bath recirculation circuit 20 and a heat exchanging portion 40 a of the hot water supply circuit 40 are arranged.
The bath recirculation circuit 20 carries a bath return pipe 21 for transporting bath water from a bath (not shown) to the heat exchange can body 10, and transports heat exchange-heated hot water from the heat exchange can body 10 to the bath. It consists of a bath outlet tube 22 for the purpose.
The bath return pipe 21 is provided with a pressure sensor 31 for detecting the bath water level, a circulation pump 32, a water flow switch 33, and a bath temperature sensor 34. The bath return pipe 21 is connected to the bath outlet pipe 22 via a three-way valve 23. A bypass 24 is provided.
The hot water supply circuit 40 has a water inlet pipe 41 for conveying water from the water supply to the heat exchange can body 10, and a hot water outlet pipe 42 for discharging hot water heated by the heat exchange can body 10, and the hot water pipe 42 is further a general hot water supply pipe 42. The pipe 43 and the bath automatic hot water supply pipe 44 are branched and extended.
The water inlet pipe 41 is provided with a water amount sensor 51 and a water inlet temperature sensor 52, and the hot water outlet pipe 42 is provided with a hot water temperature sensor 53. Further, a bypass 46 is provided from the water intake pipe 41 through a proportional control valve 45 so that water can be mixed. A water amount adjustment valve 54 and a hot water supply temperature sensor 55 are provided downstream of the junction of the bypass 46.
A general hot water supply curan 43a is provided at the end of the general hot water supply pipe 43, and the bath automatic hot water supply pipe 44 is connected to the bath return pipe 21 of the bath recirculation circuit 20 through a drop valve unit 44a having a flow sensor 44b. It is connected to enable automatic bath water supply operation including bath slimming operation.
70 is a control unit that receives information from sensors provided in each part of the device, receives a command from a remote controller (not shown), calculates and determines based on built-in software, and outputs a predetermined command to each part of the device To do.
In the above, the bath automatic hot water supply operation is an operation in which hot water of a set temperature is automatically dropped into the bathtub by a set amount, and the set temperature is controlled by the control unit 70 by the hot water temperature sensor 53, the hot water temperature sensor 55, the bath temperature. Based on temperature information from the sensor 34 or the like, it can be obtained by combustion control by the burner 12 and mixed water adjustment by the proportional control valve 45. The set amount can be obtained by controlling the drop valve unit 44a based on the flow rate information from the flow rate sensor 44b by the control unit 70.
[0009]
The control mechanism of the bath dropping operation by the control unit 70 will be described with reference to FIG. When the operation switch of the apparatus is turned on (Yes in Step S1), when a bath warming operation command is given by a remote controller (not shown) (Yes in Step S2), the control unit 70 first stores the internal memory. The final incoming water temperature T _E stored in the previous hot water supply operation is called (step S3), and the previous final incoming water temperature T _E is compared with the bath set temperature T _S (step S4). If the bath set temperature T _S is higher than the last final incoming water temperature T _E (Yes in Step S4), the process proceeds to Steps S5 to S8, and normal slimming operation is performed. In this case, the first (a bath set temperature T _S If performing bath maintenance operation) Current bath temperature T and the current bath level V and the previous last incoming water temperature T _E, bath temperature T The drop amount is calculated so as to be a constant temperature, for example, 1 ° C. lower than the bath set temperature T _S (step S5). In this case, when the temperature is lowered by 1 ° C., it may be a condition that the last final incoming water temperature T _E is 1 ° C. lower than the bath set temperature T _S in step S4. In step S5, the constant temperature can be appropriately selected in advance from 0.5 ° C. to 2-3 ° C. Corresponding to step S5, in step S4, the condition may be that the previous final incoming water temperature T _E is lower than the bath set temperature T _S by a certain temperature or more.
[0010]
When the drop amount is calculated in step S5, the calculated amount is dropped without heat exchange heating (step S6). The dropping is performed by opening the solenoid valve of the dropping valve unit 44a, and the amount of calculation water is detected by the flow sensor 44b.
When the dropping of the constant calculation amount is completed, the control unit 70 drops a small amount at the bath set temperature T _S (step S7). The small amount is, for example, a water amount of about 2 to 3 liters or less, and in the piping leading to the bathtub, that is, in the hot water supply circuit 40, the bath automatic hot water supply pipe 44, and the bath recirculation circuit 20 in this example. The amount is such that water can be replaced by the bath set temperature T _S. By setting the inside of the pipe to the bath set temperature T _S , it is possible to prevent cold water from being initially supplied during hot water supply immediately thereafter.
The controller 70 detects the incoming water temperature passing through the incoming water pipe 41 by the incoming water temperature sensor 52 and stores the obtained final incoming water temperature in the storage unit of the controller 70 when dropping in the step S6 (step S6). Step S8). This completes the bath slimming operation.
[0011]
In step S4, when the bath set temperature T _S is equal to or lower than the last final incoming water temperature T _E (No in step S4), no lukewarm water is dropped. And it progresses to step S7-step S8 like post-processing driving | running | working operation.
In the case of No in step S4, a small amount of constant water may be dropped without heat exchange heating instead of dropping no lukewarm water (step S9). The small amount of constant water in this case is, for example, an amount of water of about 2 to 3 liters or less, so that the water in the pipe leading to the bathtub, that is, the water in the water intake pipe 41 in this example can be replaced with new water. It is. As a result, the water in the water inlet pipe 41 can be replaced with water without a post-boiling state, and heat exchange heating from the initial stage of hot water supply to the set temperature can be performed without further heating the post-boiling water during subsequent hot water supply. It can be done accurately.
[0012]
【The invention's effect】
The present invention has the above-described configuration, and according to the hot water supply device with automatic bath hot water supply function according to claim 1, the bath warming operation for adjusting the bath temperature to a temperature slightly lower than the bath set temperature is provided as a control unit mechanism. When commanded, the final incoming water temperature in the previous hot water supply operation detected and stored in advance is compared with the bath set temperature in the current hot water supply operation, and the final incoming water temperature in the previous hot water supply operation is If the bath temperature is lower than the operating bath setting temperature, the drop amount is calculated so that the bath temperature is a certain temperature lower than the current hot water bath setting temperature, and that amount is heat exchange heated. When the final incoming water temperature of the previous hot water supply operation is higher than the bath setting temperature of the current hot water operation, the mechanism does not allow the drop.
Using the incoming water temperature without the influence of post-boiling, and using the previous final incoming water temperature closest to this time, the amount of dropped water required for the bath slimming operation can be reliably calculated and dropped.
In addition, since the drop is not performed when the last final incoming water temperature is high, it is possible to reliably prevent the bath temperature from rising due to the bath slimming operation.
According to the hot water supply device with automatic bath hot water supply function according to claim 2, when the final incoming water temperature of the previous hot water supply operation is equal to or higher than the bath set temperature of the current hot water supply operation, As a mechanism that allows a small amount of water that can be replaced with new water to be dropped without heat exchange heating,
As a result, the water in the water inlet pipe can be replaced with water that does not have a post-boiling state. It can be done accurately.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a single can / two-circuit type hot water supply device showing an embodiment of a hot water supply device with an automatic hot water supply function of the present invention.
FIG. 2 is a flowchart showing a control mechanism of a bath slimming operation by a control unit.
[Explanation of symbols]
10 Heat exchange can
12 Burner
20 Bath circulation circuit
40 Hot water supply circuit
41 Water pipe
44 Bath automatic hot water supply pipe
70 Control unit

Claims (2)

Water from the water supply is introduced into the heat exchange can body and heated or not heated, and then discharged into the hot water supply circuit, then automatically dropped into the bath recirculation circuit via the bath automatic hot water supply pipe and introduced into the bathtub In the hot water supply device with bath automatic hot water supply function that can be performed, and when the bath slimming operation for adjusting the bath temperature to a temperature slightly lower than the bath set temperature is commanded as a control unit mechanism, Compare the detected and stored last water temperature in the previous hot water operation with the bath setting temperature in the current hot water operation, and the final water temperature in the previous hot water operation is lower than the bath setting temperature in the current hot water operation If it is a temperature, calculate the drop amount so that the bath temperature is a certain temperature lower than the bath set temperature of the hot water supply operation this time, and drop the amount without heat exchange heating. Last when the final incoming water temperature of the hot water supply operation is a bath set temperature or more of the current hot water supply operation, the bath automatic hot water supply function-equipped water heater, characterized in that the mechanism not to perform the darken. When the final incoming water temperature of the previous hot water supply operation is equal to or higher than the bath setting temperature of the current hot water supply operation, the control unit has a constant amount of water that is small enough to replace the water in the incoming water pipe with new water. The hot-water supply apparatus with a bath automatic hot-water supply function according to claim 1, wherein the hot-water supply apparatus has a mechanism for dropping without heat exchange heating.

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