JP4002019B2 - Water pouring or hot water pouring method for a water bath with a water heater, and a water bath with a water heater - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method for pouring water or pouring a hot water bath-equipped bath with a hot water supply heat exchanger and a bath water heating heat exchanger heated by a single heat source.
[0002]
[Prior art]
The structure of a conventional bath with a hot water heater will be described with reference to FIG.
In the configuration diagram of FIG. 5, 101 is a hot water bath with a hot water heater, 2 is a heat exchanger for hot water supply, 3 is a heat exchanger for heating bath water built in the heat exchanger 2 for hot water supply, and 4 is a heat exchanger for hot water supply. It is a heating device that heats the vessel 2 and the heat exchanger 3 for bath water heating at the same time. As shown in the figure, the hot water supply heat exchanger 2 is a hot water storage type and incorporates the bath water heating heat exchanger 3, but the hot water supply heat exchanger 2 is an instantaneous type. The same applies to the case where the bath water heating heat exchanger 3 is integrated. 5 is a circulation pump in which one end of the heat exchanger 3 for heating the bath water is connected to the suction side, 6 is a bathtub, an outlet pipe 7 on the discharge side of the circulation pump 5, and the suction side of the heat exchanger 3 for heating the bath water heating Then, the return pipe 8 is connected. 9 is a pouring pipe connected in the middle of a pipe connecting the suction side of the circulation pump 5 and one end of the heat exchanger 3 for heating the bath water. The pouring pipe 9 includes a water amount detection sensor 10 and a check valve. 11, connected to the hot water supply heat exchanger 2 through the on-off valve 12. Reference numeral 13 denotes a water supply pipe to the hot water supply heat exchanger 2, which branches in the middle and connects one to the hot water heat exchanger 2 and the other to the mixing valve 14. The mixing valve 14 is connected to the on-off valve 12 on the outlet side. Connected. In the middle of the water supply pipe 13, there is means for making the water pressure or the amount of water constant according to the type of the heat exchanger 2 for hot water supply, and even in the means for making the water pressure constant, the water pressure is generally 100 kPa or less. It becomes constant. Reference numeral 15 denotes a control unit built in the hot water bath-equipped bath 101. Reference numeral 16 denotes an operation unit which is connected to the control unit 15 by a communication line or the like and is attached to a casing of the hot water hot water bath 101 or a wall surface of a building. Reference numeral 16 denotes a hot water pouring switch, 18 is a water pouring switch in the operation section 16, and 19 is a hot water or water temperature setting switch in the operation section 16. 20 is a hot water supply temperature sensor provided in the hot water supply heat exchanger 2, and 21 is a hot water temperature sensor provided in the pouring pipe 9.
[0003]
Next, the water pouring or pouring method will be described with reference to the flowchart of FIG. When the pouring switch 17 or the pouring switch 18 of the operation unit 16 is turned on (step 51), the on-off valve 12 is opened (step 52), and the water amount detection sensor 10 starts counting the pouring or pouring amount (steps 53 to 54). Hot water or water is poured into the bathtub 6. When the amount of water or amount of pouring reaches the set amount (step 54), the on-off valve 12 is closed, and the pouring switch 17 or the pouring switch 18 of the operation unit 16 is turned off (steps 55 to 56). The hot water or water injection temperature is determined by the ratio of the hot water heated by the hot water supply heat exchanger 3 and the water from the water supply pipe 13 being mixed by the mixing valve 14 and the temperature setting of the temperature setting switch 19 operated at that time. The controller 15 is controlled by the pouring switch 17 and the pouring switch 18, the pouring temperature sensor 21, and the like.
[0004]
[Problems to be solved by the invention]
However, the above-described conventional hot water heater-equipped bathtub has the following problems.
a. When the on-off valve is opened and hot water or water is injected into the bathtub, the injection pipe is connected to the middle of the pipe connecting the heat exchanger for heating the bath water and the circulation pump. Some or all of the hot water or water flowed back through the heat exchanger for heating the bath water, and the heat exchanger for heating the bath water is built in the heat exchanger for hot water supply, so that the heat exchange for hot water supply The temperature is higher than the temperature set by the temperature setting switch due to the influence of the heat on the vessel side, and the usage performance is lacking.
[0005]
b. When using as a slimming function, or when the temperature setting switch is set to a temperature lower than the bath water temperature in the bathtub, or when the water injection switch is turned on, the bath water temperature in the bathtub is lowered with as little water as possible. Therefore, the amount of bath water does not increase so much and the temperature drops and it is economical, so the mixing valve fully opens the water on the water supply pipe side and fully closes the hot water on the hot water supply heat exchanger side. However, a part or all of the injected water flows back through the heat exchanger for heating the bath water, and the heat exchanger for heating the bath water is built in the heat exchanger for hot water supply. Under the influence of the side heat, the temperature becomes higher than the water temperature of the water supply pipe. For this reason, it is necessary to inject a large amount of water in order to set the temperature or to a desired temperature. In some cases, it is wasteful that the user needs to drain the hot water in the bathtub to take a bath. Lack.
[0006]
The present invention solves the above-described conventional problems, and provides a method for pouring or pouring a water bath with a hot water heater that is excellent in usability of being able to pour water and pour hot water according to temperature settings and is also economical. With the goal.
[0007]
The water pouring or pouring method of the hot water bath-equipped bath according to claim 1 of the present invention is as follows:
A heat exchanger for hot water supply,
A circulation pump whose discharge side is piped to the bathtub;
A bath water heating heat exchanger having an upstream end piped to the bathtub and a downstream end piped to the suction side of the circulation pump;
A heating device for simultaneously heating the hot water supply heat exchanger and the bath water heating heat exchanger;
The downstream end is directly connected in the middle of the pipe connecting the suction side of the circulation pump and the downstream end of the heat exchanger for heating the bath water, and is connected to the upstream end via a check valve, an on-off valve, and a mixing valve. A pouring pipe connected to the hot water heat exchanger,
The downstream side branches, one is connected to the heat exchanger for hot water supply, and the other is a water supply pipe connected to the mixing valve,
A control unit,
The hot water supply pipe connected to the mixing valve is connected to the water supply pipe on one inlet side, the hot water supply pipe connected to the outlet side of the heat exchanger for hot water supply is connected to the other inlet side, and is connected to the on-off valve on the outlet side. In a water bath with a water heater to which a pipe is connected, a water pouring or pouring method for pouring or pouring water into the bathtub,
The controller opens the on-off valve in the middle of the pouring pipe and simultaneously drives the circulation pump so that the amount of water flowing through the pouring pipe is equal to the amount of water flowing through the discharge side of the circulation pump. Thus, the operation of the circulation pump is controlled.
As a result, almost all of the hot water or water injected from the pouring pipe at the time of pouring or pouring is drawn into the circulation pump and directly enters the bathtub without passing through the heat exchanger for heating the bath water. The performance of injecting hot water or water at a temperature set by the temperature setting switch and the performance of injecting water equal to the water temperature of the water supply pipe are not affected by the above.
[0008]
The water pouring or pouring method for the hot water bath with a hot water heater according to claim 2 of the present invention is the water pouring or pouring method for the hot water bath with a hot water heater according to claim 1,
The bath with a water heater is
A first water amount detection sensor for detecting the amount of water flowing through the circulation pump of the circulation circuit;
A second water amount detection sensor for detecting the amount of water flowing through the pouring pipe,
Based on the amount of water detected by the first and second water amount detection sensors, the control unit opens the on-off valve in the middle of the pouring pipe, and at the same time, equals a constant flow rate flowing through the pouring pipe. The circulation pump is driven by a control that repeatedly energizes the circulation pump for a certain period of time and stops energization for a certain period of time.
It is characterized by.
As a result, the entire amount of hot water or water injected from the pouring pipe at the time of pouring or pouring is sucked into the circulation pump and flows directly into the bathtub without flowing back through the heat exchanger for heating the bath water. It has the performance of injecting hot water or water at a temperature set by the temperature setting switch without being influenced, and the performance of injecting water equal to the water temperature of the water supply pipe.
[0009]
The water pouring or pouring method of the hot water bath with hot water heater according to claim 3 of the present invention is the water pouring or hot water pouring method of the hot water bath with hot water heater according to claim 1,
The bath with a water heater is
A first water amount detection sensor for detecting the amount of water flowing through the circulation pump of the circulation circuit;
A second water amount detection sensor for detecting the amount of water flowing through the pouring pipe,
Controlling the number of revolutions of the circulation pump by the control unit so that the amount of water detected by the first and second water amount detection sensors becomes equal.
It is characterized by.
Thereby, since the circulation amount of the circulation pump is controlled to be equal to the amount of hot water or water injected from the pouring pipe during pouring or pouring, the total amount of hot water or water injected from the pouring pipe is Without passing through the heat exchanger for bath water heating, it is sucked into the circulation pump and directly enters the bathtub, so it is not affected by heat and injects hot water or water at the temperature set by the temperature setting switch and water supply pipe It has the ability to inject water equal to the water temperature.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a water pouring method or a pouring method for a water bath with a water heater in the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram of a water bath with a water heater in the embodiment, and FIGS. 2, 3, and 4 are flowcharts of water injection or a water pouring method of the water bath with a water heater in the embodiment.
[0011]
In the configuration diagram of FIG. 1, the same components as those in FIG. 1 is a bath tub with a hot water heater in the embodiment, 12 is an on-off valve such as a solenoid valve or an electric valve, 17 is a hot water switch on the operation unit 16, and 18 is a water injection switch on the operation unit 16. The hot water switch 17 and the water injection switch 18 may be provided separately as in this example, but there may be a case where a single switch serves as both. Further, the hot water pouring switch 17 and the water pouring switch 18 are named as automatic switches, additional hot water switches, hot water switches, lukewarm switches, etc. depending on functions other than pouring hot water or water into the bathtub 6. Since the functions other than those are not related to the present description, the hot water pouring switch 17 and the water pouring switch 18 are simply used as switches for injecting hot water or water. Reference numeral 22 denotes a circulating water amount detection sensor provided on the discharge side of the circulation pump 5. The circulating water amount sensor 22 may be attached to the suction side of the circulation pump 5.
[0012]
The water pouring or pouring method in the hot water bath with the above configuration will be described below with reference to the flowcharts of FIGS. 2, 3, and 4.
In the flow chart of FIG. 2 (Claim 1), when the pouring switch 17 or the pouring switch 18 of the operation unit 16 is turned on (step 1), the on-off valve 12 is opened (step 2), and the water amount detection sensor 10 indicates the amount of pouring or pouring amount. Counting is started (steps 3 to 4). If the water injection or pouring amount is not counted up (if water injection or pouring up to the set amount is not completed), the circulation pump 5 is driven simultaneously (step 5), and hot water or water is injected into the bathtub 6. When the amount of water injection or hot water injection reaches the set amount (step 4), the on-off valve 12 is closed, the circulation pump 5 is stopped, and the hot water supply switch 17 or the water injection switch 18 of the operation unit 16 is turned off (steps 6-7). At this time, the hot water or water injection temperature is determined by the ratio of the hot water heated by the hot water supply heat exchanger 3 and the water from the water supply pipe 13 being mixed by the mixing valve 14 and the temperature setting of the temperature setting switch 19 operated at that time. The controller 15 is controlled by the pouring switch 17 and the pouring switch 18, the pouring temperature sensor 21, and the like.
[0013]
In the flowchart of FIG. 3 (Claim 2), when the pouring switch 17 or the pouring switch 18 of the operation unit 16 is turned on (Step 11), the on-off valve 12 is opened (Step 12), and the water amount detection sensor 10 indicates the amount of pouring or pouring amount. Counting is started (steps 13 to 14). If the water injection or pouring amount is not counted up (if water injection or pouring up to the set amount is not completed), the circulation pump 5 is driven simultaneously (step 15), and hot water or water is injected into the bathtub 6. Is done. At this time, the circulation pump 5 is driven so as to repeat energization for a certain time and stop energization for a certain time (steps 15 to 19), and is controlled to be equal to a certain flow rate flowing to the pouring pipe. When the amount of water or hot water reached the set amount (step 14), the on-off valve 12 is closed, the circulation pump 5 is stopped, and the hot water switch 17 or the water injection switch 18 of the operation unit 16 is turned off (steps 20 to 21). The hot water or water injection temperature is determined by the ratio of the hot water heated by the hot water supply heat exchanger 3 and the water from the water supply pipe 13 being mixed by the mixing valve 14 and the temperature setting of the temperature setting switch 19 operated at that time. The controller 15 is controlled by the pouring switch 17 and the pouring switch 18, the pouring temperature sensor 21, and the like.
[0014]
In the flowchart of FIG. 4 (Claim 3), when the pouring switch 17 or the pouring switch 18 of the operation unit 16 is turned on (step 31), the on-off valve 12 is opened and the circulation pump 5 is driven (step 32), and the water amount is detected. The sensor 10 starts counting the amount of water poured or poured (step 33), and hot water or water is injected into the bathtub 6. At this time, the rotation speed of the circulation pump 5 is controlled so that the water amounts of the water amount detection sensor 10 and the circulation water amount detection sensor 22 are equal (steps 35 to 38). When the water injection or the amount of pouring reaches the set amount (step 34), the on-off valve 12 is closed, the circulation pump 5 is stopped, and the pouring switch 17 or the water pouring switch 18 of the operation unit 16 is turned off (steps 39 to 40). The hot water or water injection temperature is determined by the ratio of the hot water heated by the hot water supply heat exchanger 3 and the water from the water supply pipe 13 being mixed by the mixing valve 14 and the temperature setting of the temperature setting switch 19 operated at that time. The controller 15 is controlled by the pouring switch 17 and the pouring switch 18, the pouring temperature sensor 21, and the like.
[0015]
As described above, in the embodiment, since the water pouring or the pouring method of the hot water provided bath tub is controlled, the following actions are obtained.
a. The temperature setting is not affected by heat because the hot water or water injected from the hot water pipe during pouring or pouring does not flow back through the heat exchanger for heating the bath water, but is drawn into the circulation pump and directly enters the bathtub. The performance of injecting hot water or water at a temperature set by the switch can be improved.
b. Hot water or water injected from the pouring pipe at the time of pouring or pouring does not flow back through the heat exchanger for heating the bath water, but is sucked into the circulation pump and directly enters the bathtub so that it is not affected by heat. In the case of lowering the bath water temperature, it has the ability to inject water equal to the water temperature of the water supply pipe with a small amount of water, thereby improving the economy.
[0016]
【The invention's effect】
By the method of the present invention, by opening the on-off valve and simultaneously driving the circulation pump, the hot water or water injected from the hot water pipe during pouring or pouring into the bath water heating heat exchanger does not flow back. The temperature of the hot water or water to be poured can be poured or poured into a bath with a water heater close to the temperature setting.
[0017]
Moreover, this invention can inject | pour the water equivalent to the water temperature of a water supply pipe with a small amount of water, when lowering the bath water temperature of a bathtub.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a bath with a hot water heater according to the present invention.
FIG. 2 is a flowchart of the first embodiment in the water pouring or pouring method of the present invention.
FIG. 3 is a flowchart of a second embodiment of the water pouring or pouring method of the present invention.
FIG. 4 is a flowchart of a third embodiment in the pouring or pouring method of the present invention.
FIG. 5 is a configuration diagram of a conventional hot water heater equipped with a water heater.
FIG. 6 is a flowchart in a conventional water pouring or pouring method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bath kettle with a hot water heater 2 Heat exchanger for hot water supply 3 Heat exchanger for bath water heating 4 Heating device 5 Circulation pump 6 Bathtub 7 Outward pipe 8 Return pipe 9 Hot water pipe 10 Water amount detection sensor 11 Check valve 12 Open / close valve 13 Water supply pipe 14 Mixing valve 15 Control unit 16 Operation unit 17 Hot water switch 18 Water injection switch 19 Temperature setting switch 20 Hot water temperature sensor 21 Hot water temperature sensor 22 Circulating water amount detection sensor

Claims (6)

A heat exchanger for hot water supply,
A circulation pump whose discharge side is piped to the bathtub;
A bath water heating heat exchanger having an upstream end piped to the bathtub and a downstream end piped to the suction side of the circulation pump ;
A heating device for simultaneously heating the hot water supply heat exchanger and the bath water heating heat exchanger;
Downstream end, is directly connected to the middle of the pipe connecting the downstream end of said bath water heating heat exchanger and the suction side of the circulation pump, a check valve, on-off valve, and via the mixing valve, the upstream end a pouring tube but which is connected to the heat exchanger for the hot water supply,
The downstream side branches , one is connected to the heat exchanger for hot water supply, and the other is a water supply pipe connected to the mixing valve,
A control unit,
The hot water supply to the said mixing valve, said water supply pipe to one of the inlet side, is connected to the other of the inlet side the supply pipe communicating with the hot water supply heat exchanger outlet side communicates with the on-off valve on the outlet side Oite the water heater with bathtub which tube is connected to a water injection or pouring method for performing injection or pouring into the tub,
The controller opens the on-off valve in the middle of the pouring pipe and simultaneously drives the circulation pump so that the amount of water flowing through the pouring pipe is equal to the amount of water flowing through the discharge side of the circulation pump. the water injection or pouring method of the water heater with bathtub characterized that you control the operation of the circulation pump so. The bath with a water heater is
A first water amount detection sensor for detecting the amount of water flowing through the circulation pump of the circulation circuit;
A second water amount detection sensor for detecting the amount of water flowing through the pouring pipe,
Based on the amount of water detected by the first and second water amount detection sensors, the control unit opens the on-off valve in the middle of the pouring pipe, and at the same time, equals a constant flow rate flowing through the pouring pipe. 2. The water pouring or pouring method for a hot water heater-equipped bath tub according to claim 1 , wherein the circulation pump is driven by a control that repeatedly energizes the circulation pump for a certain period of time and stops energization for a certain period of time. The bath with a water heater is
A first water quantity detecting sensor for detecting the amount of water flowing through the circulation pump of the circulation circuit,
A second water amount detection sensor for detecting the amount of water flowing through the pouring pipe,
As the first and the amount of water that will be detected by the second water detection sensor is equal, water heater with bathtub according to claim 1, characterized in that controlling the rotation speed of the circulation pump by the control unit Water or pouring method.   A heat exchanger for hot water supply,
  A circulation pump whose discharge side is piped to the bathtub;
  A bath water heating heat exchanger having an upstream end piped to the bathtub and a downstream end piped to the suction side of the circulation pump;
  A heating device for simultaneously heating the hot water supply heat exchanger and the bath water heating heat exchanger;
  The downstream end is directly connected in the middle of the pipe connecting the suction side of the circulation pump and the downstream end of the heat exchanger for heating the bath water, and is connected to the upstream end via a check valve, an on-off valve, and a mixing valve. A pouring pipe connected to the hot water heat exchanger,
  The downstream side is branched, one is connected to the heat exchanger for hot water supply, and the other is a water supply pipe connected to the mixing valve,
  A control unit,
  The mixing valve has the water supply pipe on one inlet side and the heat exchanger for hot water supply on the other inlet side. The hot water supply bath connected to the mouth side is connected to the outlet side, and the hot water supply pipe connected to the open / close valve on the outlet side is connected to the hot water bath,
  The control unit opens the on-off valve in the middle of the pouring pipe and simultaneously drives the circulation pump so that the amount of water flowing through the pouring pipe becomes equal to the amount of water flowing through the discharge side of the circulation pump. Thus, the operation of the circulating pump is controlled as described above.   A first water amount detection sensor for detecting the amount of water flowing through the circulation pump of the circulation circuit;
  A second water amount detection sensor for detecting the amount of water flowing through the pouring pipe,
  The control unit opens the on-off valve in the middle of the pouring pipe based on the amount of water detected by the first and second water quantity detection sensors, and at the same time equals a constant flow rate flowing through the pouring pipe. The circulation pump is driven by a control that repeatedly energizes the circulation pump for a certain period of time and stops energization for a certain period of time.
The bath with a hot water heater according to claim 4.   A first water amount detection sensor for detecting the amount of water flowing through the circulation pump of the circulation circuit;
  A second water amount detection sensor for detecting the amount of water flowing through the pouring pipe,
  The control unit controls the number of rotations of the circulation pump so that water amounts detected by the first and second water amount detection sensors are equal.
The bath pot with a water heater according to claim 4.

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