JP5656468B2 - Bath equipment - Google Patents

Description

  The present invention relates to a bath apparatus having a function of reheating bath water.

  Conventionally, various bath apparatuses have been proposed, and when a user feels hot water in a bathtub hot, for example, by operating a remote control device that is signal-connected to the bath apparatus, A bath apparatus having a configuration for adding an amount of water of 10 liters and reducing the temperature of hot water is widely used. In addition, the hot water in the bathtub is circulated through the recirculation circuit connected to the bathtub, and at this time, the combustion fan (fan that sends air for burner combustion) is driven without reheating the hot water in the bathtub. Therefore, a configuration has also been proposed in which bathtub hot water circulating in the recirculation circulation path is cooled by blowing air from the fan to lower the bathtub hot water temperature (for example, see Patent Document 1).

JP-A-6-58623

  However, when water is added as described above, the bathtub water level usually rises by the amount of additional water, even though the bath water has been filled up to a preset set water level, which is inconvenient. There was a problem that the water was wasted. Further, as in the invention described in Patent Document 1, in the configuration in which the hot water in the bathtub is circulated in the recirculation circuit and cooled by the fan, there is no problem of the water level rise, but the fan is purposely driven to drive the bathtub. There is a problem that heat energy is wasted because the hot water is cooled.

  The present invention has been made in order to solve the above-mentioned problems, and its purpose is to provide a bath apparatus that can lower the temperature of a bathtub hot water according to the user's wishes without wasting water or heat energy. It is to provide.

In order to achieve the above object, the present invention has the following configuration as means for solving the problems. That is, the first invention has a recirculation circulation passage connected to the bathtub, and the recirculation circulation passage is provided with a bathtub hot water circulation pump for circulating the bathtub hot water, and the recirculation circulation passage has hot water. A hot water tank for storing hot water is thermally connected via a heat exchange means, and a hot water temperature detecting means for detecting the temperature of the hot water in the bathtub, and a hot water temperature detecting means for detecting the temperature of the hot water in the hot water tank. The bath water temperature detection value detected by the bathtub hot water temperature detection means and the hot water temperature detection means detected by the bathtub hot water temperature detection means The detected hot water temperature detection value is compared, and when the hot water temperature detection value is lower than the bathtub hot water temperature detection value, the bathtub hot water circulation pump is driven to reheat the bath water without reheating. Is circulated through the passage, it has a temperature drop for the heat exchange control means for decreasing the bath water temperature by heat exchange through the heat exchange means and the hot water in the bathtub hot water and the hot water storage water tank to the circulating, also And a solar collector that has a solar light receiving surface and collects solar heat, and the heat collector is configured to heat the liquid inside by the solar heat received by the light receiving surface. A heat collector liquid circulation passage for circulating the liquid is connected to the heat collector, and the heat collector liquid circulation passage is thermally connected to the hot water storage tank and the recirculation circulation passage, and heat exchange for lowering the temperature When heat is exchanged between the hot water in the bathtub and the hot water in the hot water tank circulated through the recirculation circulation passage by the control means, when the temperature of the liquid circulating in the liquid circulation passage for the heat collector is lower than the detection value of the bathtub hot water temperature The above Bath water and hot water are circulated through the recirculation circulation passage and the liquid is circulated through the heat collector liquid circulation passage, and the bath water and the hot water are passed through the recirculation circulation passage through the liquid in the heat collector liquid circulation passage. and hot water in the water tank has a means for solving the problems with the configuration in which Ru is heat exchanged.

Further, the second invention has a recirculation circulation passage connected to the bathtub, the recirculation circulation passage is provided with a bathtub hot water circulation pump for circulating the bathtub hot water, and the recirculation circulation passage has hot water. A hot water tank for storing hot water is thermally connected via a heat exchange means, and a hot water temperature detecting means for detecting the temperature of the hot water in the bathtub, and a hot water temperature detecting means for detecting the temperature of the hot water in the hot water tank. And a bathtub hot water temperature detection value detected by the bathtub hot water temperature detecting means in response to a bathtub hot water temperature lowering command for lowering the preset hot water temperature lower than a predetermined bath set temperature. Comparing with the hot water temperature detection value detected by the hot water temperature detection means, and when the hot water temperature detection value is lower than the bathtub hot water temperature detection value, the bathtub hot water circulation pump is driven to keep up the bathtub hot water. Heat exchange for lowering the temperature of the bath water by reducing the temperature of the bath water by circulating through the recirculation circulation passage without heat exchange between the hot water in the hot water bath and the hot water in the hot water tank through the heat exchanging means. The temperature lowering heat exchange control means stops the bathtub hot water circulation pump when the detected value of the bathtub hot water temperature is lower than the set temperature of the bath, and The heat exchanging operation with the hot water in the hot water storage tank is configured to stop , and has a solar collector that collects the heat of sunlight with a solar receiver, and the collector is the receiver. The internal liquid is heated by the heat of sunlight received at the heat collector, and a liquid circulation passage for the heat collector for circulating the liquid is connected to the heat collector, and the liquid circulation passage for the heat collector is a hot water storage tank. And heat up in the recirculation passage When the heat exchange between the hot water in the hot water bath and the hot water in the hot water tank is performed by the temperature reduction heat exchange control means and the hot water in the hot water tank is exchanged, When the temperature is lower than the bath water temperature detection value, the bath water is circulated through the recirculation circulation passage and the liquid is circulated through the heat collector liquid circulation passage, via the liquid in the heat collector liquid circulation passage. Thus, the bath hot water passing through the recirculation circulation passage and the hot water in the hot water storage tank are configured to perform heat exchange as means for solving the problem.

Further, the third invention has a heating liquid circulation passage for circulating the liquid in the heating device in addition to the structure of the first or second invention, and the heating liquid circulation passage is the liquid for the heat collector. When the hot water in the bathtub and hot water in the hot water storage tank is heat-exchanged by the temperature reduction heat exchange control means, and the hot water in the hot water storage tank is exchanged, When the temperature of the liquid circulating in the liquid circulation passage for the heater is lower than the detected bath water temperature, the bath hot water is circulated through the recirculation circulation passage and the liquid is circulated through the heat collector liquid circulation passage. Furthermore, the liquid is circulated through the heating liquid circulation passage, and the recirculation circulation passage is passed through the liquid in the collector liquid circulation passage and the liquid in the heating liquid circulation passage. The bathtub hot water through and the hot water of the hot water storage water tank, characterized by being configured to heat exchange.

Further, in the fourth invention, in addition to the configuration of the first, second, or third invention, the liquid circulating passage for the heat collector does not pass the liquid circulating through the liquid circulating passage for the heat collector through the heat collector. A bypass passage for circulation is formed, and when the hot water in the bathtub hot water and the hot water in the hot water tank are circulated through the recirculation circulation passage by the temperature reduction heat exchange control means, the heat circulation is circulated in the liquid circulation passage for the heat collector. The liquid is circulated through the bypass passage without passing through the heat collector.

  According to the present invention, the temperature lowering heat exchange control means receives the bathtub hot water temperature lowering instruction for lowering the bathtub hot water temperature below a predetermined bath set temperature, and obtains the bathtub hot water temperature detected value and the stored hot water temperature detected value. In comparison, when the hot water temperature detection value is lower than the bathtub hot water temperature detection value, the hot water in the bathtub is circulated through the recirculation passage without being reheated, and the hot water in the hot water in the hot water storage tank is heated. Since the bath water temperature is lowered by exchanging heat through the exchanging means, it is possible to prevent a problem that water is wasted as when adding water to lower the bath water temperature.

  In addition, since the present invention can lower the bath water temperature as described above, unlike the configuration in which the fan is driven to cool the bath water while passing the bath water in the recirculation circuit, the thermal energy is reduced. Without wasting, the thermal energy of the bathtub hot water can be moved to the hot water tank side through the heat exchange means. And by this movement of thermal energy, the thermal energy can be used effectively when, for example, hot water in a hot water tank is used for hot water supply or the like. In other words, if the hot water in the hot water tank is warmed by the heat of the hot water in the bathtub, the hot water can be used for hot water supply when directly using the hot water in the hot water tank, and the heat is also used when heated. It is possible to supply hot water at a set temperature even if the heating amount is small by the amount of energy.

  Further, according to the present invention, the heat exchange control means for lowering the temperature receives the bathtub hot water temperature lowering instruction for lowering the bath water temperature lower than the predetermined bath setting temperature, and lowers the bath hot water temperature. Heat is exchanged between the hot water and hot water in the hot water storage tank through a heat exchanging means, and the bathtub hot water circulation pump is stopped when the bathtub hot water temperature detection value is lower than the set temperature lower than the bath set temperature. By stopping the heat exchange operation between the hot water and the hot water in the hot water storage tank, the bathtub hot water temperature can be set lower than the bath set temperature.

  Further, in the present invention, there is provided a heat collector that has a light receiving surface for sunlight and collects the heat of sunlight, and a liquid circulation passage for the heat collector for circulating the liquid in the heat collector, The liquid circulation passage is thermally connected to the hot water storage tank and the recirculation circulation passage, and when the temperature of the liquid circulating through the liquid circulation passage for the heat collector and the detected hot water temperature is lower than the bathtub hot water temperature, By circulating the liquid through the recirculation circulation passage and circulating the liquid through the liquid circulation passage for the heat collector, the hot water in the bathtub and the hot water tank passing through the recirculation circulation passage through the liquid in the liquid circulation passage for the heat collector The effect can be achieved by heat exchange with hot water.

  In general, bathing is performed at night, and heat collection by the heat collector is performed during the day, so the liquid in the liquid circulation passage for the heat collector is often lower than the bath water temperature raised to the set temperature, Heat exchange between the hot water in the bathtub and the hot water in the hot water storage tank that passes through the recirculation circulation passage through the liquid in the liquid circulation passage for the heat collector can be performed efficiently.

  Further, in the present invention, the heating liquid circulation passage for circulating the liquid in the heating device is thermally connected to the heat collector liquid circulation passage and the recirculation circulation passage, and the liquid circulating through the heat collector liquid circulation passage is When the temperature, the temperature of the liquid circulating in the liquid circulation passage for the heater, and the detected hot water temperature are lower than the bathtub hot water temperature, the bathtub hot water is circulated through the recirculation circulation passage, and By circulating the liquid and further circulating the liquid through the heating liquid circulation passage, the liquid passes through the recirculation circulation passage through the liquid in the collector liquid circulation passage and the liquid in the heating liquid circulation passage. Heat can be exchanged between the hot water in the bathtub and the hot water in the hot water tank.

  Further, in the present invention, a bypass passage for circulating the liquid circulating through the heat collector liquid circulation passage without passing through the heat collector is formed in the liquid circulation passage for the heat collector. When heat is exchanged between the hot water in the bathtub and the hot water in the hot water tank circulated through the recirculation circulation passage, by circulating the liquid circulating in the liquid circulation passage for the heat collector through the bypass passage without passing through the heat collector, The heat collector liquid circulation passage can be circulated through a short path, and the heat exchange can be performed efficiently.

It is a block diagram which shows the control structure of 1st Example of the bath apparatus which concerns on this invention. It is explanatory drawing which shows typically the system configuration | structure of the bath apparatus of 1st Example. It is explanatory drawing which shows typically the system configuration | structure of the bath apparatus of 2nd Example. It is a block diagram which shows the control structure of the bath apparatus of 2nd Example. It is explanatory drawing which shows typically the piping structure conventionally used in order to introduce the remaining hot water of a bath into a washing machine.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 2 schematically shows the system configuration of the first embodiment of the bath apparatus. This bath device is a composite device having a hot water supply function, a bath reheating function, and a heating function, and is formed by connecting a hot water storage unit 31 and an auxiliary heat source device 15. The hot water storage unit 31 is provided with a heat collector liquid circulation passage 3 that circulates liquid as indicated by arrows A and A ′, and the heat collector liquid circulation passage 3 collects the heat of sunlight. It is connected to a heat machine (collector) 13. The heat collector 13 is configured to heat an internal liquid by the heat of sunlight received by the light receiving surface, and the heat collector 13 is formed with an internal passage through which the liquid passes, for example.

  For example, in a detached house, the heat collector 13 is arranged on the roof with the same angle (for example, 30 degrees) as the inclination of the roof. It is also possible to arrange the sunlight receiving surface in the vertical direction.

  In the liquid circulation passage 3 for the heat collector, the liquid circulation pump 5 for circulating the liquid, the liquid-liquid heat exchanger 16, the electromagnetic valve 38, the open air system 50, and the liquid circulation passage for the heat collector. 3, a thermistor 61 that detects the temperature of the liquid passing through 3 is interposed. The heat collector liquid circulation passage 3 is formed with a bypass passage 40 for circulating the liquid circulating in the heat collector liquid circulation passage 3 without passing through the heat collector 13. The bypass passage 40 has an electromagnetic valve. 39 is interposed. For example, when collecting the heat of sunlight by the heat collector 13 during the daytime, the electromagnetic valve 38 is opened and the liquid circulation pump 5 is driven with the electromagnetic valve 39 closed, as described above. The liquid is circulated in the heat collector liquid circulation passage 3 as indicated by arrows A and A ′. If necessary, the electromagnetic valve 38 is closed and the electromagnetic valve 39 is opened to drive the liquid circulation pump 5 so that the liquid flows as shown by arrows A and A ″. It can be made to circulate in the heat collector liquid circulation passage 3 (see the hatched portion in the heat collector liquid circulation passage 3).

  A liquid circulation passage 17 for a heater is thermally connected to the liquid circulation passage 3 for the heat collector via the liquid-liquid heat exchanger 16, and an electromagnetic valve 18 is connected to the liquid circulation passage 17 for the heater. A thermistor 62 for detecting the temperature of the liquid passing through the liquid circulation passage 17 for the heater is interposed. Although not shown in the figure, a heating device such as a hot water mat is connected to the liquid circulation passage 17 for the heater via an electromagnetic valve or the like. The auxiliary heat source device 15 is thermally connected to the liquid circulation passage 17 for the heater.

  The auxiliary heat source device 15 is provided with a liquid circulation pump 45 that circulates the liquid in the liquid circulation passage 17 for the heater as indicated by an arrow B, and a heating heat exchanger 42. Although not shown in the figure, a burner (gas burner) for heating the heat exchanger 42 for heating, a fuel (gas) supply passage to the burner, and a fan for supplying and exhausting the burner are provided. It has been. While the heating heat exchanger 42 is heated by the combustion of the burner, the liquid in the liquid circulation passage 17 for the heater is circulated and the liquid is supplied to the heater, whereby the heating by the heater can be performed. The drive control of the liquid circulation pump 45 and the burner combustion control in the auxiliary heat source device 15 are performed by the combustion control means 10 (see FIG. 1) not shown in FIG.

  The recirculation circulation passage 4 is thermally connected to the liquid circulation passage 17 for the heater via a recuperation heat exchanger 12 of a liquid-liquid heat exchanger provided in the auxiliary heat source device 15. The soaking circulation passage 4 is connected to the bathtub 2. The recirculation circulation passage 4 has a return pipe 54 and a forward recirculation pipe 55. The recirculation circulation path 4 has a bathtub hot water circulation pump 6 that circulates the bathtub hot water as indicated by an arrow C, and the temperature of the bathtub hot water. A bath water temperature detecting means 7 for detecting is interposed.

  In accordance with the control of the combustion control means 10, the bathtub hot water circulation pump 6 is driven to circulate the bathtub hot water through the recirculation circulation passage 4 as shown by the arrow C, and the electromagnetic valve 18 is opened and the liquid circulation pump 45 is opened. By driving, the liquid is circulated through the liquid circulation passage 17 for the heater as indicated by the arrow B, thereby exchanging heat between the liquid passing through the liquid circulation passage 17 for the heater and the hot / cold hot water passing through the recirculation circulation passage 4. Is performed via the reheating heat exchanger 12. At this time, the bath water can be replenished by heating the liquid passing through the heater liquid circulation passage 17 by the heating heat exchanger 42. In the reheating of the bathtub hot water, the bathtub hot water detection temperature detected by the bathtub hot water temperature detection means 7 reaches, for example, a bath setting temperature set in advance by operation of the remote control device 60 connected in signal to the auxiliary heat source device 15. Is done. The remote control device 60 is installed in an appropriate place such as a bathroom or a kitchen.

  Further, a part of the heat collector liquid circulation passage 3 is passed through the hot water storage tank 14, whereby the heat collector liquid circulation passage 3 is thermally connected to the hot water storage tank 14. Therefore, in the present embodiment, the recirculation circulation passage 4 is the heat collector liquid circulation passage 3, the liquid-liquid heat exchanger 16, the heater liquid circulation passage 17, and the reheating heat exchanger as heat exchange means. 12 and is connected thermally to the hot water storage tank 14.

  The hot water tank 14 is provided with thermistors 34 to 37 as hot water temperature detecting means for detecting the temperature of hot water stored in the hot water tank 14. Further, a water supply passage 19 and a drainage passage 20 are connected to the lower side of the hot water storage tank 14, and a check valve 21 is interposed in the water supply passage 19, and a drainage electromagnetic valve 22 is interposed in the drainage passage 20. ing. The hot water storage tank 14 is disposed outdoors, for example. Depending on the place (region) where the bath device is disposed, the hot water storage tank 14 is provided around the hot water storage tank 14 and the water supply passage 19 and the drainage passage 20 outdoors. A heater (not shown) is provided around the passage, and the freeze prevention operation can be performed by operating these heaters.

  A hot water supply passage 23 is connected to the upper side of the hot water storage tank 14, and a pressure relief passage 30 having a relief valve 29 is connected to the hot water supply passage 23. The hot water supply passage 23 is connected to the auxiliary heat source device 15, and is connected to a hot water supply destination such as a kitchen or a bathroom via the auxiliary heat source device 15. Furthermore, solenoid valves 24, 25, and 26 are connected to the hot water supply passage 23, and a bypass passage 28 having a check valve 27 is connected to the solenoid valve (mixing valve) 26. It is connected to the water supply passage 19 via this. The bypass passage 28 is provided with incoming water temperature detecting means 44.

  Further, in the hot water supply passage 23, a hot water temperature detecting means 46 is provided upstream of the electromagnetic valve 25 (side closer to the hot water storage tank 14), and hot water is discharged from the hot water supply passage 23 downstream of the electromagnetic valves 25 and 26. There are provided flow rate detection means 49 for detecting the flow rate of hot water and mixed hot water temperature detection means 48 for detecting the temperature of hot water discharged from the hot water supply passage 23. The flow rate detecting means 49 detects the flow rate of hot water formed (mixed) by adding unheated water through the bypass passage 28 to the hot water discharged from the hot water storage tank 14, and the mixed hot water temperature detecting means 48. Detects the temperature of the hot water.

  In addition, in the same figure, although illustration of a connection structure with the hot water supply passage 23 in the auxiliary heat source device 15 is omitted, the hot water supply passage 23 is provided with a heat exchanger for hot water supply. There is provided a hot water supply related heating configuration having a burner (gas burner) for heating, a fuel (gas) supply passage to the burner, and a fan for supplying and exhausting the burner. In the auxiliary heat source device 15, the temperature of hot water discharged from the hot water storage tank 14 and introduced into the auxiliary heat source device 15 as shown by the arrow D 'in the figure (the detected temperature of the hot water temperature detecting means 46) is set to hot water supply. When the temperature is higher than the temperature, the hot water is led to the hot water supply destination from the hot water passage 23a without being heated. When the temperature of the hot water discharged from the hot water storage tank 14 is lower than the hot water supply set temperature, the hot water is removed according to the control of the combustion control means 10. It is heated and led as a hot water supply set temperature from the hot water supply passage 23a to the hot water supply destination.

  In this bath apparatus, the liquid circulation pump 5 provided in the heat collector liquid circulation passage 3 is driven, whereby the liquid in the heat collector liquid circulation passage 3 is indicated by arrows A and A ′ in the figure. At this time, when the liquid passing through the heat collector liquid circulation passage 3 is heated by sunlight using the heat collector 13, the hot water in the hot water storage tank 14 is heated by the heat. In addition, as shown by an arrow D in the figure, hot water is supplied from the water supply passage 19 into the hot water storage tank 14, and the hot water heated through the hot water tank 14 is supplied by a hot water supply as shown by an arrow D 'in the figure. The hot water is discharged from the hot water supply destination through the passage 23. When the temperature of the hot water discharged from the hot water storage tank 14 is higher than the hot water supply set temperature, the unheated water passes through the bypass passage 28 and passes through the hot water supply passage 23 as shown by an arrow E in the figure. It is mixed and discharged.

  Further, by circulating the liquid in the liquid circulation passage 3 for the heat collector and the hot water in the liquid circulation passage 17 for the heater together, the liquid circulation passage 3 for the heat collector is passed through the liquid-liquid heat exchanger 16. Heat exchange between the liquid and hot water in the liquid circulation passage 17 for the heater can be performed. Therefore, for example, even if bacteria (for example, Legionella bacteria) are mixed from the cistern 50 into the liquid circulation passage 3 for the heat collector, the auxiliary heat source device 15 is activated to increase the temperature of the liquid that is passed through the liquid circulation passage 17 for the heater. The liquid circulating in the heat collector liquid circulation passage 3 is heated to, for example, 60 degrees or more by heat exchange between the liquid and the liquid in the liquid circulation passage 3 for the heat collector. Heating sterilization of the circulating liquid can be performed.

  FIG. 1 shows a characteristic control configuration in this embodiment. As shown in the figure, a remote control device 60, a control device 32 provided in the auxiliary heat source device 15, and a control device 33 provided in the hot water storage tank unit 31 are connected in signal connection. The bathtub hot water temperature lowering operation unit 47 is provided, the control device 32 is provided with the bathtub hot water temperature lowering command transmission unit 8, the washing water injection signal input unit 9, and the combustion control means 10, and the control device 33 includes the temperature Lowering heat exchange control means 11 is provided.

  The bathtub hot water temperature lowering operation unit 47 performs an operation for lowering the bath hot water temperature below a predetermined bath set temperature, and the bathtub hot water temperature lowering operation unit 47 is displayed, for example, as “slimy”. It is formed by operation buttons. When the bathtub hot water temperature lowering operation unit 47 is operated, a bathtub hot water temperature lowering command for lowering the bath hot water temperature below a predetermined bath set temperature is output and applied to the bathtub hot water temperature lowering command transmission unit 8 of the control device 32. . The bathtub hot water temperature lowering instruction transmission unit 8 relays the bathtub hot water temperature lowering instruction and adds it to the temperature lowering heat exchange control means 11 of the control device 33.

  The temperature lowering heat exchange control means 11 receives the bathtub hot water temperature lowering instruction, and is detected based on the bathtub hot water temperature detected value detected by the bathtub hot water temperature detecting means 7 and the detected temperature of the thermistors 34-37. Compare with the detected hot water temperature. The temperature lowering heat exchange control means 11 receives the bathtub hot water temperature detection value by the bathtub hot water temperature detection means 7 via the combustion control means 10. Further, the stored hot water temperature detection value may be an average value of the temperatures detected by the thermistors 34 to 37, or may be the highest value among the temperatures detected by the thermistors 34 to 37. Further, the temperature lowering heat exchange control means 11 is configured such that the temperature of the liquid circulating through the heat collector liquid circulation passage 3 (detected temperature of the thermistor 61) and the temperature of the liquid circulating through the heater liquid circulation passage 17 (thermistor 62). ) Is compared with the detected bath water temperature.

  And when both the temperature of both liquids and the said hot water storage water temperature detection value are lower than the bathtub hot water temperature detection value, the heat exchange control means 11 for temperature reduction gives a command to the washing water injection signal input part 9, and bath water hot water circulation The pump 6 is driven to circulate the bathtub hot water without reheating (without heating) through the recirculation circulation passage 4, and a command is given to the combustion control means 10 to drive the liquid circulation pump 45 to heat the bath. The liquid in the machine liquid circulation passage 17 is circulated.

  Further, the temperature lowering heat exchange control means 11 closes the electromagnetic valve 38 provided in the liquid circulation passage 3 for the heat collector, opens the electromagnetic valve 39 provided in the bypass passage 40, and opens the liquid circulation pump 5. And the liquid in the liquid circulation passage 3 for the heat collector is circulated through the bypass passage 40 without passing through the heat collector 13 as indicated by arrows A and A ″ in FIG. The bath water is recirculated through the circulation passage 4 and circulated through the liquid circulation passage 3 for the heat collector and the liquid circulation passage 17 for the heater. The exchange control means 11 exchanges heat between the hot water in the bathtub and the hot water in the hot water storage tank 14 circulated without heating the recirculation circulation passage 4 through the liquid in the passages 3 and 17 to lower the temperature of the hot water in the bathtub. .

  For example, when the detected bath water temperature is 40 ° C. and the amount of hot water in the bathtub is 180 liters, the detected hot water temperature is 18 ° C. and the amount of hot water in the hot water tank 14 is 100 liters, the heat exchange is performed for 1 hour. By doing, the temperature of bathtub hot water can be reduced about 5 degreeC. A person feels sensitive even if the bath water temperature is slightly lowered. Thus, the heat shock can be mitigated by slowly lowering the bath water temperature.

  The bathtub hot water temperature lowering instruction is preferably a command for lowering the bathtub hot water temperature lower than the bath set temperature by a preset lowering temperature (for example, 2 ° C.), and the following control is preferably performed. The set lowering temperature may be given in advance in the remote control device 60 or the control device 32, for example, 2 ° C., or 0.5, for example, when the operation button of the remote control device 60 is pressed once. It is good also as a value which can be changed according to a user's operation, such as setting it to 1 degreeC, when it pushes 2 degreeC twice. Moreover, when it is set as the structure which can vary setting fall temperature, you may define the upper limit of setting fall temperature.

When the bathtub hot water temperature lowering instruction is output from the bathtub hot water temperature lowering operation section 47 to lower the bathtub hot water temperature lower than the bath set temperature, the temperature lowering heat exchange control means 11 detects the bathtub hot water temperature. When the value becomes lower than the set lower temperature than the bath set temperature, the bathtub hot water circulation pump 6 and the liquid circulation pumps 5 and 45 are stopped, and the heat exchange operation between the bath hot water and the hot water in the hot water storage tank 14 is performed. Try to stop.

  Conventionally, as a configuration for using bathtub hot water for washing, for example, a configuration as shown in FIG. 5 has been used. In this configuration, a bath hot water introduction passage 70 is connected to a water injection passage 71 for pouring water into the washing machine, and when the bath hot water is used for washing, a three-way valve 69 provided in the recirculation circulation passage 4 is as shown in FIG. In the direction, water is poured into the washing machine through the bathtub hot water introduction passage 70 and the water injection passage 71 without heating the bathtub hot water passed from the bathtub 2 into the recirculation circulation passage 4. In the figure, reference numeral 72 indicates a filter, reference numeral 73 indicates a passage for pouring tap water into the washing machine, and reference numeral 74 indicates a passage for heating the tap water by the bath water heater 75 and pouring water into the washing machine.

  Although such a pipe configuration is not always used at present, the control unit for the bath water heater 75 is provided with a standard input portion for a washing water input signal for performing such control. The bath water heater 75 can be used as the auxiliary heat source device 15. Therefore, in the present embodiment, as described above, when the bathtub hot water temperature lowering command is output from the remote control device 60, the temperature lowering heat exchange control means 11 applies a command to the washing water injection signal input unit 9, and the bath hot water circulation is performed. The pump 6 is driven to circulate through the recirculation circulation passage 4 without reheating the bath water (without heating). That is, if this configuration is used, an existing bath water heater is used as the auxiliary heat source device 15, and the hot water storage unit 31 is connected to the auxiliary heat source device 15, so that the operation as described above is performed using the existing control configuration. A bath device that can be used can be formed.

  In the case where a bath apparatus having a system configuration as in the present embodiment is formed from the beginning without using an existing bath water heater, the temperature reduction heat exchange control means 11 is provided without providing the washing water injection signal input unit 9. In response to the command, a means for driving the bathtub hot water circulation pump 6 to circulate the bathtub hot water in the recirculation circulation passage 4 without reheating may be provided.

  Next, a second embodiment of the bath apparatus according to the present invention will be described with reference to FIGS. In the description of the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the redundant description thereof is omitted or simplified.

  As shown in FIG. 3, the second embodiment also has a hot water storage unit 31 and an auxiliary heat source device 15 as in the first embodiment. However, in the second embodiment, the second embodiment is different from the first embodiment. The heater liquid circulation passage 17, the solenoid valve 18, and the thermistor 62 are omitted, and the reheating circulation passage 4 is thermally connected to the heat collector liquid circulation passage 3 via the liquid-liquid heat exchanger 16. Yes. Accordingly, in the auxiliary heat source device 15, the recirculation circulation passage 4, the bathtub hot water circulation pump 6, the reheating heat exchanger 12, the bathtub hot water temperature detection means 7, and the hot water supply related heating configuration (not shown). And are provided. Further, in the second embodiment, since the liquid circulation passage 17 for the heater is not provided, the control configuration as shown in FIG. 4 is provided, and the apparatus is provided by the amount not provided with the liquid circulation passage 17 for the heater. The configuration and control configuration are simple, but there is no heating function.

  In the second embodiment, when the temperature reduction heat exchange control means 11 exchanges heat between the hot water in the bathtub and the hot water in the hot water tank 14 circulated through the recirculation circulation passage 4, the hot water temperature detection value and the heat collector When the temperature of the liquid circulating in the liquid circulation passage 3 is lower than the bath water temperature detection value, the bath water is not heated by the signal input to the washing water injection signal input unit 9 as in the first embodiment. While circulating through the recirculation circulation path 4, the liquid circulation pump 5 is driven to circulate the liquid in the liquid circulation path 3 for the heat collector through the liquid circulation path 3 for the heat collector, and the liquid circulation path 3 for the heat collector. The bath hot water passing through the recirculation circulation passage 4 and the hot water in the hot water storage tank 14 are exchanged through the liquid and the liquid-liquid heat exchanger 16.

  In addition, this invention is not limited to each said Example, It sets suitably. For example, in each of the above-described embodiments, when the hot water in the bathtub and hot water in the hot water tank 14 is exchanged by the temperature lowering heat exchange control means 11 through the recirculation circulation passage 4, the liquid circulation passage 3 for the heat collector is provided. Although the circulating liquid is circulated through the bypass passage 40 without passing through the heat collector 13, the liquid circulated through the heat collector liquid circulation passage 3 may be circulated through the heat collector 13.

  Moreover, the system configuration of the bath apparatus is not particularly limited, and the other configurations are appropriately selected as long as the recirculation circulation passage 4 and the hot water storage tank 14 are thermally connected through the heat exchange means. Is set. For example, the heat collector 13 and the liquid circulation passage 3 for the heat collector can be omitted. In this case, the recirculation circulation passage 4 and the hot water storage tank 14 may be connected via a liquid-liquid heat exchanger as heat exchange means, or the recirculation circulation passage 4 is passed through the hot water storage tank 14 to The recirculation circulation passage 4 and the hot water storage tank 14 are directly heated so that the contact portion between the hot water circulation tank 4 passing through the hot water storage tank 14 and the hot water storage tank 14 functions as a heat exchange means. May be connected. However, in the configuration in which the recirculation circulation passage 4 and the hot water tank 14 are directly and thermally connected, when a hole is opened in the recirculation circulation passage 4 passed through the hot water storage tank 14, May be mixed with the hot water in the hot water storage tank 14 and may be unfavorable for hygiene, so that the recirculation circulation passage 4 and the hot water storage tank 14 are directly connected to the hot water tank 14 as in the above embodiment. It is preferable to connect via a simple structure or a liquid-liquid heat exchanger.

  Furthermore, the bath device of the present invention may be provided with a burner for oil combustion or an electric heater instead of the burner that performs gas combustion provided in the above-described embodiment, for example. Further, the hot water supply passage 23 is connected to the recirculation circulation passage 4 through a pouring passage (not shown), and the hot water supply passage 23, the pouring passage, and the recirculation circulation passage 4 are sequentially passed to the bathtub 2 automatically. An automatic hot water filling function of pouring hot water into the hot water may be provided.

  The bath apparatus of the present invention can be used to reduce the bath water temperature without wasting water and heat energy, and can be used by moving the reduced heat energy into the hot water tank. Energy saving is possible, and it can be used, for example, as a home bath apparatus.

DESCRIPTION OF SYMBOLS 2 Bathtub 3 Collector side liquid circulation path 4 Reheating circulation path 5 Liquid circulation pump 6 Bathtub hot water circulation pump 7 Bathtub hot water temperature detection means 8 Bathtub hot water temperature lowering command transmission part 9 Washing water injection signal input part 10 Combustion control means 11 Temperature drop Heat exchange control means 13 Heat collector 14 Hot water storage tank 15 Auxiliary heat source device 17 Liquid circulation passage for heater

Claims (4)

The recirculation circulation passage has a recirculation circulation passage connected to the bathtub, and the recirculation circulation passage is provided with a bathtub hot water circulation pump that circulates the hot water in the bathtub. A hot water temperature detecting means for detecting the temperature of the hot water in the bathtub, and a hot water temperature detecting means for detecting the temperature of the hot water in the hot water tank. A bath water temperature detection value detected by the bath water temperature detecting means, and a hot water temperature detection value detected by the hot water temperature detecting means And when the hot water temperature detection value is lower than the bathtub hot water temperature detection value, the bathtub hot water circulation pump is driven to circulate the bath hot water through the reheating circulation passage without reheating, Bath hot water circulating between the hot water in the hot water storage water tank have a temperature drop for the heat exchange control means for decreasing the bath water temperature by heat exchange through the heat exchange means, the light receiving surface of the solar And a heat collector that collects the heat of sunlight. The heat collector is configured to heat an internal liquid by the heat of sunlight received by the light receiving surface, and circulates the liquid. A heat collector liquid circulation passage is connected to the heat collector, and the heat collector liquid circulation passage is thermally connected to the hot water storage tank and the recirculation circulation passage, and the recuperation is performed by the temperature reduction heat exchange control means. When heat exchange is performed between the hot water in the bathtub and the hot water in the hot water tank circulated through the circulation passage, the temperature of the liquid circulating in the liquid circulation passage for the heat collector is lower than the detected value of the hot water temperature in the bathtub, Chasing circulation Circulates through the passage and circulates the liquid through the liquid circulation passage for the collector, and heats the hot water in the bathtub and the hot water in the hot water storage tank through the recirculation circulation passage through the liquid in the liquid circulation passage for the collector. A bath apparatus characterized by having a configuration for replacement . The recirculation circulation passage has a recirculation circulation passage connected to the bathtub, and the recirculation circulation passage is provided with a bathtub hot water circulation pump that circulates the hot water in the bathtub. A hot water temperature detecting means for detecting the temperature of the hot water in the bathtub, and a hot water temperature detecting means for detecting the temperature of the hot water in the hot water tank. Is detected by the bathtub hot water temperature detecting means and the hot water temperature detecting means detected by the bathtub hot water temperature detecting means in response to a command for lowering the bathtub hot water temperature lowering than a predetermined bath setting temperature. The stored hot water temperature detection value is compared, and when the stored hot water temperature detection value is lower than the bathtub hot water temperature detection value, the bath hot water circulation pump is driven to drive the bath water without reheating. Circulating through the annular passage, and having heat exchange control means for lowering the temperature of the hot water in the bathtub by lowering the temperature of the hot water in the bathtub by exchanging heat between the hot water in the hot water tank and the hot water in the hot water tank, The temperature lowering heat exchange control means stops the bathtub hot water circulation pump when the detected value of the bathtub hot water temperature becomes lower than the set temperature lower than the bath set temperature, and hot water in the bathtub hot water and the hot water storage tank. And a heat collector that collects the heat of sunlight with a sunlight receiving surface, and the heat collector receives the heat of sunlight received by the light receiving surface. A liquid collector circulation passage for circulating the liquid is connected to the heat collector, and the liquid circulation passage for the heat collector is connected to the hot water storage tank and the recirculation circulation passage. Is thermally connected to the When heat exchange between the hot water in the bathtub and hot water in the hot water tank is performed by the heat exchange control means for lowering the temperature, the temperature of the liquid circulating in the liquid circulation passage for the collector is detected The bath water is circulated through the recirculation circulation passage and the liquid is circulated through the heat collector liquid circulation passage, and the recirculation circulation passage through the liquid in the heat collector liquid circulation passage. A bath apparatus, characterized in that heat is exchanged between the hot water in the bathtub and the hot water in the hot water tank . A heating liquid circulation passage for circulating liquid in the heating device is provided, and the heating liquid circulation passage is thermally connected to the collector liquid circulation passage and the recirculation circulation passage, and heat exchange for temperature reduction When heat is exchanged between the bathtub hot water circulated through the recirculation circulation passage and the hot water in the hot water storage tank by the control means, when the temperature of the liquid circulating in the liquid circulation passage for the heater is lower than the detected bath water temperature Circulating the bath hot water through the recirculation circulation passage, circulating the liquid through the heat collector liquid circulation passage, and further circulating the liquid through the heating liquid circulation passage. Heat exchange between the hot water in the hot water tank and the bathtub hot water passing through the recirculation circulation passage through the liquid in the heating liquid circulation passage Bath apparatus according to claim 1 or claim 2, wherein. A bypass passage for circulating the liquid circulating through the heat collector liquid circulation passage without passing through the heat collector is formed in the liquid circulation passage for the heat collector, and is circulated through the recirculation circulation passage by the heat exchange control means for temperature reduction. when to heat exchange the hot water in the bathtub hot water and hot-water storage water tank to the claim 1, characterized by being configured to circulate through the bypass passage of the liquid circulating in the liquid circulation passage the heat collector device without passing through the heat collecting machine Or the bath apparatus of Claim 2 or Claim 3 .

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