JP2017156048A - Water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve temperature sensible feeling.SOLUTION: A water heater includes: first piping 801 connected to a first connection port 51a provided in a bathtub; second piping 802 connected to a second connection port 51b; and flow passage switching parts 81, 86, 38 for alternately switching between a first flow passage for causing bathtub water heated by a bath heat exchanger 42 to flow into the bathtub 51 from the first connection port 51a through the first piping 801 and a second flow passage for causing the bathtub water to flow into the bathtub 51 from the second connection port 51b through the second piping 802.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hot water supply apparatus including a heat exchanger that heat-exchanges bathtub water stored in a bathtub and hot water in a tank to heat the bathtub water.

  Conventionally, a heat pump type comprising a tank for storing hot water supply water, a heat pump unit for heating before returning the hot water supply water in the lower part of the tank to the upper part, and a bath circulation pump for circulating the bathtub water in the bathtub in the bathtub water circulation circuit There is a hot water supply device (see, for example, Patent Document 1). This hot water supply apparatus further controls the output of the reheating heat exchanger for heating the bathtub water by exchanging heat between the bathtub water circulating in the bathtub water circulation circuit and the hot water in the tank, and the output of the bath circulation pump. A control device for adjusting the circulation flow rate of water is provided. And the control apparatus is comprised so that the output of a bath circulation pump may be varied according to the parameter using the bath water temperature in the chasing operation.

Japanese Patent No. 5764938

  The hot-water supply device described in Patent Document 1 includes an adapter provided in a bathtub, and the adapter includes a forward pipe that allows the bath water to flow into the bathtub, and a pipe for the bath that allows the bath water in the bathtub to flow out. And are connected. And the bathtub water which flows in in a bathtub flows in through an outward pipe, and the bathtub water which flows out out of the bathtub flows out through piping for baths. For this reason, there exists a problem that sufficient temperature sensation feeling cannot be obtained.

  The present invention has been made in view of the above problems, and an object of the present invention is to improve the temperature sensation feeling.

  In order to achieve the above object, the invention according to claim 1 is directed to a tank (11) for storing hot water, and bath water stored in the bathtub (51) and hot water in the tank by exchanging heat. The hot water supply apparatus provided with the heat exchanger (42) which heats 1st piping (801) connected to the 1st connection port (51a) provided in the bathtub, and the 2nd connection provided in the bathtub A second pipe (802) connected to the port (51b), a first flow path for allowing the bath water heated by the heat exchanger to flow out of the first connection port into the bathtub through the first pipe, A flow path switching unit (81, 86, 38) that alternately switches between the second flow path that passes through the second pipe and flows out from the second connection port into the bathtub is provided.

  According to such a configuration, the bathtub water heated by the heat exchanger alternately flows out from the first connection port and the second connection port into the bathtub, so that the thermal sensation feeling can be improved. .

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

It is a figure showing the whole hot water supply device composition concerning a 1st embodiment of the present invention. It is a figure showing the example of a part display of the menu screen displayed on the display panel of the bath remote control. It is a flowchart which shows the process at the time of the bath alternate circulation operation | movement by the hot water supply control part of the hot water supply apparatus of 1st Embodiment. It is the figure which showed the flow at the time of bathtub water flowing out from the 1st connection port in the bathtub in alternate circulation operation. It is the figure which showed the flow at the time of bathtub water flowing out into the bathtub from the 2nd connection port in bath alternate circulation operation. It is a flowchart which shows the process at the time of hot water filling and alternate pouring by the hot water supply control part of the hot water supply apparatus of 2nd Embodiment. It is the figure which showed the flow which hot water supply flows in into a bathtub from both the 1st connection port and the 2nd connection port. It is the figure which showed the flow which hot water supply flows in into a bathtub from a 1st connection port. It is the figure which showed the flow which hot water supply flows in into a bathtub from a 2nd connection port. It is a flowchart which shows the process at the time of piping washing | cleaning by the hot water supply control part of the hot water supply apparatus of 3rd Embodiment. It is the figure which showed the flow of the city water of the pattern 1 at the time of pipe washing. It is the figure which showed the flow of the city water of the pattern 2 at the time of pipe washing. It is the figure which showed the flow of the city water of the pattern 3 at the time of pipe washing. It is the figure which showed the flow of the city water of the pattern 4 at the time of pipe washing. It is the figure which showed the state of the flow-path switching part of the hot water supply apparatus which concerns on 4th Embodiment. It is the figure which showed the state of the flow-path switching part of the hot water supply apparatus which concerns on 4th Embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. Note that, in each of the following embodiments, parts that are the same as or equivalent to the matters described in the preceding embodiment are denoted by the same reference numerals, and the description thereof may be omitted. Moreover, in each embodiment, when only a part of the component is described, the component described in the preceding embodiment can be applied to the other part of the component.

(First embodiment)
A water heater 10 according to a first embodiment of the present invention will be described with reference to FIGS. A hot water supply apparatus 10 shown in FIG. 1 is a hot water storage type hot water supply apparatus used for general household use. The hot water supply device 10 uses the heat storage fluid stored in the hot water storage tank 11 as a heat source, in addition to the hot water supply function to the kitchen, washroom, bathroom, etc., and also to fill the hot water in the bathtub 51 and the hot water bathed. It has a function to whisper. In this embodiment, the same hot water supply water as the hot water supply side is used as the heat storage fluid.

  The hot water supply device 10 controls the hot water storage tank unit 20, the hot water supply control unit 38 that controls the operation of the hot water storage tank unit 20, the heat pump unit 13 that functions as a heat source of the hot water storage tank unit 20, and the operation of the heat pump unit 13. The heat source control unit 40, a kitchen remote controller 90 as a main remote controller installed in the kitchen, and a bath remote controller 92 installed in the bathroom are configured.

  The hot water storage tank unit 20 includes a hot water storage tank 11, a boiling circuit 12, a thermal load circuit 14, a water supply pipe 15, and a hot water supply pipe 27, and stores hot water in the hot water storage tank 11 and supplies the hot water. This is a hot water supply unit. The hot water storage tank 11 is a container for storing hot water for hot water supply and is made of a metal excellent in corrosion resistance, for example, made of stainless steel. A heat insulating material is provided on the outer periphery thereof, and hot water for hot water supply is provided for a long time. Can keep warm. The hot water storage tank 11 has a vertically long shape, and an introduction port 11a is provided on the bottom surface thereof.

  The hot water storage tank 11 is provided with a water temperature thermistor 11b including seven thermistors arranged in the height direction in order to detect the amount of hot water stored in the hot water storage tank 11 and the hot water storage temperature. The hot water filled in the hot water storage tank 11 at each water level or the temperature information of the water is output to the hot water supply control unit 38. Therefore, the hot water supply control unit 38 can detect the boundary position between the hot water heated up in the hot water storage tank 11 and the water before boiling in the hot water storage tank 11 based on the temperature information from the water temperature thermistor 11b. At the same time, the hot water storage amount can be detected.

  A city water inflow pipe 21 for supplying city water into the hot water storage tank 11 is connected to the introduction port 11 a on the bottom surface of the hot water storage tank 11. The city water pipe 22 connected to the city water inflow pipe 21 is provided with a pressure reducing valve 23 for adjusting the water pressure of the introduced tap water to a predetermined pressure and preventing the backflow of hot water in the case of water interruption. Yes. The city water pipe 22 is connected to a bath mixing valve 24 and a hot water supply mixing valve 25 described later via a water supply pipe 15.

  The heat pump unit 13 is a heat source unit that functions as a heat source for boiling the hot water supplied by the hot water storage tank unit 20. That is, the heat pump unit 13 is a heating unit that heats the heat storage fluid flowing from the inlet pipe 36 and discharges it to the outlet pipe 37.

  The heat pump unit 13 has a heat pump cycle that uses carbon dioxide having a low critical temperature as a refrigerant. Accordingly, although not shown, the heat pump unit 13 has at least a compressor, a water-refrigerant heat exchanger as a radiator, a variable pressure reducer, an evaporator, and a gas-liquid separator. Connected to make up. Further, an evaporator temperature thermistor for detecting the temperature on the downstream side of the evaporator is provided on the downstream side of the evaporator. The heat source control unit 40 receives detection information from the evaporator temperature thermistor and controls the operation of the variable pressure reducer and the compressor.

  The heat pump unit 13 heats up hot water by exchanging heat between the high-temperature and high-pressure refrigerant flowing through the refrigerant flow path of the water-refrigerant heat exchanger and the water flowing through the water flow path of the water-refrigerant heat exchanger. be able to. Moreover, you may comprise the heat pump unit 13 by the ejector-type cycle using an electric ejector.

  When the heat pump cycle of the heat pump unit 13 is configured by a supercritical heat pump, hot water having a temperature higher than that of a general heat pump cycle, for example, about 85 ° C. to 90 ° C. can be stored in the hot water storage tank 11. The heat pump cycle is mainly used to boil up hot water in the hot water storage tank 11 when the hot water stored in the hot water storage tank 11 is insufficient or by using late-night power in the late-night time period when the price setting is inexpensive. Perform hot water operation.

  The boiling circuit 12 is a circuit for taking out the heat storage fluid from the lower part of the hot water storage tank 11, heating it with the heat pump unit 13, and returning the heat storage fluid to the upper part of the hot water storage tank 11 again. The boiling circuit 12 connects the lower part of the hot water tank 11 and the inlet pipe 36 of the heat pump unit 13, and the boiling pipe 31 connects the outlet pipe 37 of the heat pump unit 13 and the upper part of the hot water tank 11. A return pipe 32 is provided. The heat pump unit 13 has a boiling circulation pump 33, and the boiling circulation pump 33 transfers the heat storage fluid in the lower part of the hot water storage tank 11 from the boiling forward piping 31 to the inlet piping of the heat pump unit 13. It is circulated in the direction of returning to the upper part of the hot water storage tank 11 through the outlet pipe 37 and the return pipe 32 for boiling.

  Further, a bypass valve 34 is provided in the return pipe 32 for boiling. The bypass valve 34 is provided with a bypass pipe 35 that connects the boiling return pipe 32 and the lower part of the hot water storage tank 11. The bypass valve 34 adjusts a flow rate ratio between a flow rate passing through the boiling return pipe 32 and flowing toward the upper portion of the hot water storage tank 11 and a flow rate passing through the bypass pipe 35 and flowing into the lower portion of the hot water storage tank 11.

  The heat load circuit 14 is used for exchanging heat stored in the bath tub 51 to which hot water is supplied from the hot water storage tank unit 20 to exchange heat between the heat storage fluid in the hot water storage tank 11 and the hot water in the tub 51. Circuit. The thermal load circuit 14 includes an extraction pipe 41, a bath heat exchanger 42, an intake pipe 43, a bath primary pump 44, a bath primary thermistor 45, and a bath primary check valve 46. The take-out pipe 41 is connected to the upper part of the hot water storage tank 11 and the return pipe 32 for boiling. The bath heat exchanger 42 exchanges heat between the heat storage fluid that has passed through the extraction pipe 41 and the bath side (heat load side). Specifically, the bath heat exchanger 42 includes a first circulation part 42a through which a heat storage fluid in the hot water storage tank 11 circulates and a second circulation part 42b through which bath water circulates, and the first circulation part 42a and The 2nd distribution part 42b is constituted so that it may mutually adjoin. And the bath heat exchanger 42 is comprised so that the fluid for thermal storage and bathtub water may become a counterflow, and heat exchange is performed between both.

  The intake pipe 43 returns the heat storage fluid that has passed through the bath heat exchanger 42 to the hot water storage tank 11. The bath primary pump 44 is a heat load circulation pump that circulates the heat storage fluid of the hot water storage tank 11 from the extraction pipe 41 to the hot water storage tank 11 through the bath heat exchanger 42 and the intake pipe 43. . The bath primary thermistor 45 detects the temperature of the heat storage fluid that passes through the extraction pipe 41. The bath primary check valve 46 is provided in the intake pipe 43 so as to block the flow of the heat storage fluid from the intake pipe 43 to the first circulation part 42a, and the heat storage fluid in the hot water storage tank 11 is transferred to the bath heat exchanger. It is provided to prevent convection to the hot water storage tank 11 through 42 and the intake pipe 43.

  On the upper part of the hot water storage tank 11, a hot water supply pipe 27 is provided in which hot water from the high temperature water section in the hot water storage tank 11 flows out to the hot water use side terminal. The hot water supply pipe 27 communicates with a shower 54, a currant, a hand-washer, etc., and the pipe that branches off in the middle is a bath pipe 28 that communicates with the bath tub 51.

  A discharge pipe 53 provided with a relief valve 52 is connected in the middle of the hot water supply pipe 27. When the pressure in the hot water storage tank 11 rises above a predetermined pressure, the hot water in the hot water storage tank 11 is discharged. It is configured so as not to discharge to the outside and damage the hot water storage tank 11 and the like.

  A city water inflow pipe 21 branched from a city water pipe 22 for taking in city water such as tap water is connected to the lower part of the hot water storage tank 11. The hot water supply pipe 27 is connected with a water supply pipe 15 that communicates with the city water pipe 22.

  The intermediate hot water portion, which is an almost intermediate portion in the hot water storage tank 11, communicates with the intermediate hot water pipe 29 for deriving the intermediate hot water out of the hot water for hot water stored in the hot water storage tank 11. An intermediate temperature water mixing valve 30 is provided at the junction of the hot water supply pipe 27 and the intermediate temperature water pipe 29. The intermediate temperature water mixing valve 30 is a temperature adjustment valve that adjusts the hot water temperature of the hot water supply water. By adjusting the ratio of the respective opening areas, the intermediate temperature water extracted from the hot water supply pipe 27 and the intermediate temperature water extracted from the intermediate temperature water pipe 29 are used. The mixing ratio can be adjusted. Further, the intermediate warm water pipe 29 is provided with an intermediate warm water check valve 17. The intermediate temperature water check valve 17 is provided so that high temperature water at the upper part of the hot water storage tank 11 does not flow back to the intermediate temperature water portion of the hot water storage tank 11 via the intermediate temperature water mixing valve 30. Further, in the hot water supply pipe 27, an intermediate hot water thermistor 39 is provided between the intermediate hot water mixing valve 30 and the hot water supply mixing valve 25.

  A hot water supply pipe 27 and a branched bath pipe 28 are connected to a downstream portion of the intermediate temperature water mixing valve 30. A hot water supply mixing valve 25 is provided in the hot water supply piping 27 on the downstream side of the intermediate temperature water mixing valve 30, and a bath mixing valve 24 is provided in the bath piping 28. The hot water supply mixing valve 25 is provided at the junction of the hot water supply pipe 27 and the water supply pipe 15. The bath mixing valve 24 is provided at the junction between the bath pipe 28 and the water supply pipe 15. The hot water supply mixing valve 25 and the bath mixing valve 24 are temperature control valves that adjust the temperature of hot water for hot water discharged from the ends of the hot water supply pipe 27 and the bath pipe 28, respectively. By adjusting the ratio of the respective opening areas, that is, the ratio of the opening degree on the hot water supply water side adjusted in temperature by the intermediate temperature water mixing valve 30 and the opening degree on the water side communicating with the city water pipe 22, Adjust the hot water temperature to the set temperature.

  A hot water supply thermistor 61, a hot water flow rate counter 62, and a hot water check valve 63 are provided in the hot water supply pipe 27 on the downstream side of the hot water mixing valve 25. The hot water supply thermistor 61 detects the temperature of the hot water flowing through the hot water supply pipe 27. The hot water flow rate counter 62 detects the flow rate of hot water flowing through the hot water supply pipe 27. The hot water check valve 63 is provided so as not to flow backward from the shower 54 at the end of the hot water supply pipe 27 to the hot water mixing valve 25.

  The bath piping 28 on the downstream side of the bath mixing valve 24 is provided with a bath pouring unit 70 for pouring the bath. The bath pouring unit 70 includes a bath electromagnetic valve 71, a backflow prevention valve 72, a bath thermistor 73, a bath flow counter 74, and two bath check valves 75. The bath thermistor 73 detects the temperature of the hot water flowing through the bath pipe 28. The bath flow rate counter 74 detects the flow rate of hot water flowing through the bath piping 28. The two check valves 75 for bath are provided to prevent the bath water in the bath water circulation circuit 80 from flowing back to the bath mixing valve 24.

  Between the two check valves 75 for bath, there is provided a check valve 74 having an upstream end connected to the discharge path and a pressure guiding pipe connected downstream of the bath mixing valve 24. The backflow prevention valve 72 can be discharged to the outside of the bath pouring unit 70 by operating the backflow prevention valve 72 according to the pressure difference between the two connection points when there is bath water to enter the hot water supply pipe 27 side. It is like that.

  The bath solenoid valve 71 is opened when the bathtub 51 is filled with hot water, hot water or additional hot water. The bath solenoid valve 71 is controlled so that the mixed hot water having a predetermined flow rate is discharged based on the flow rate information detected by the bath flow rate counter 74.

  The hot water mixing valve 25 and the bath mixing valve 24 are subjected to feedback control based on the hot water temperature of hot water detected by the thermistors 61 and 73 provided on the respective outlet sides. When each flow counter 62, 74 detects the flow of water in the hot water supply pipe 27 and bath pipe 28, the hot water tap, shower 54 or bath solenoid valve 71 at the end of each pipe is opened. The hot water supply water is being discharged.

  A bath water circulation circuit 80 for circulating bath water in the bathtub 51 is connected to the bathtub 51. The bath water circulation circuit 80 circulates the bath water in the bath heat exchanger 42 for exchanging heat with the heat load circuit 14 that circulates hot water in the hot water storage tank 11. The bath water circulation circuit 80 includes a first pipe 801 connected to a first connection port 51 a provided in the bathtub 51 and a second pipe 802 connected to a second connection port 51 b provided in the bathtub 51. ing. The bath water circulation circuit 80 includes a third pipe 803 connected to the bath water inlet of the bath heat exchanger 42 and a fourth pipe 804 connected to the bath water outlet of the heat exchanger 42. I have. Further, the bath water circulation circuit 80 includes a first flow path switching unit 81 and a second flow path switching unit 86.

  The first connection port 51 a and the second connection port 51 b are provided in an adapter 510 provided in the bathtub 51. The first connection port 51a is disposed on the right side of the second connection port 51b when the adapter 510 is viewed from the bathtub 51.

  The first flow path switching unit 81 is an electric three-way valve connected to the first pipe 801, the second pipe 802, and the fourth pipe 804. The first flow path switching unit 81 switches between a flow path for flowing bathtub water flowing out from the bath heat exchanger 42 to the fourth pipe 804 to the first pipe 801 and a flow path flowing to the second pipe 802.

  The second flow path switching unit 86 is an electric three-way valve connected to the first pipe 801, the second pipe 802 and the third pipe 803. The second flow path switching unit 86 is configured to flow the bathtub water flowing out from the first connection port 51 a in the bathtub 51 to the first pipe 801 to the third pipe 803 and the second connection port 51 b in the bathtub 51. The bath water that has flowed out to the second pipe 802 is switched to the flow path that flows to the third pipe 803.

  The 1st flow-path switching part 81, the 2nd flow-path switching part 86, and the hot-water supply control part 38 mentioned later pass the 1st connection port 51a through the 1st piping 801 the bath water heated by the bath heat exchanger 42. A flow path switching unit that alternately switches between a first flow path that flows out into the bathtub 51 and a second flow path that passes through the second pipe 802 and flows into the bathtub 51 from the second connection port 51b.

  The third pipe 803 is provided with a bath water level sensor 82, a bath circulation sensor 83, a bath circulation thermistor 85, and a bath circulation pump 84 in order from the upstream side. The fourth piping 804 is provided with a bath reheating thermistor 87.

  The bath water level sensor 82 is a pressure type water level sensor that detects the water pressure in the third pipe 803 as a physical value indicating the water level, and the hot water supply control unit 38 that receives the detection signal from the bath water level sensor 82 is the bath water level sensor 82. The pressure detected by is converted into a water level.

  The bath circulation sensor 83 is a sensor for detecting whether or not bath water is flowing in the direction of the third pipe 803 toward the bath heat exchanger 42. The bath reheating thermistor 87 detects the temperature of the bath water flowing out from the bath heat exchanger 42. The bath chasing thermistor 87 is a bath chasing temperature sensor that detects the temperature of the bath water flowing out of the bath heat exchanger 42. The bath circulation pump 84 circulates the bath water in the bathtub 51 from the second pipe 802 and the third pipe 803 to the bathtub 51 via the bath heat exchanger 42, the fourth pipe 804, and the first pipe 801. It is a pump. The bath heat exchanger thermistor 87 detects the outlet temperature of the bath heat exchanger 42. The downstream end of the bath pipe 28 is connected to a third pipe 803 between the bath circulation pump 84 and the bath heat exchanger 42.

  The hot water supply control unit 38 is configured mainly with a microcomputer, and a ROM or RAM built in the hot water supply control unit 38 is provided with a preset control program or an updatable control program. The configuration of the heat source control unit 40 is the same as this. Moreover, the hot water supply control unit 38 and the heat source control unit 40 are connected to be communicable with each other, and function as one control unit by communicating with each other.

  The hot water supply control unit 38 also includes temperature information from each thermistor, flow rate information from each flow counter and flow switch, detection information from other sensors, and operation signals from operation switches such as the kitchen remote control 90 and the bath remote control 92. Based on the above, the actuators such as each mixing valve, electromagnetic valve, switching valve, and bath circulation pump 84 are controlled. Moreover, the heat source control part 40 controls the heat pump unit 13 based on the signal from the hot water supply control part 38, for example. Operation switches such as the kitchen remote controller 90 and the bath remote controller 92 are used to operate the heat pump unit 13, the boiling circulation pump 33, and the bath primary pump 44.

  Next, the operation of the hot water supply apparatus 10 will be described. First, the hot water storage operation of the hot water storage tank 11 using the heat pump unit 13 will be described.

  The heat pump unit 13 is operated as a specific boiling time zone, for example, in the nighttime zone of the hourly lighting system. By operating the heat pump unit 13, the water in the lower part of the hot water storage tank 11 is boiled up to a predetermined boiling temperature and returned to the upper part of the hot water storage tank 11. Store hot water for minutes.

  Next, the hot water supply operation will be described. By opening a hot water tap or the like disposed on the downstream side of the hot water supply pipe 27, the hot water in the hot water storage tank 11 is pushed out by the water supply pressure. And the hot water from the hot water storage tank 11 and the water from the city water inflow piping 21 are mixed by each mixing valve 24, 25, 30 and hot water is supplied through each piping.

  Next, utilization of the bathtub 51 will be described. When filling the bathtub 51 with hot water, the hot water in the hot water storage tank 11 is pushed out by the water supply pressure by opening the solenoid valve 71 for bath, and hot water from the hot water storage tank 11 and the city water inflow pipe 21 are supplied through the hot water supply pipe 27. The water is mixed with the bath mixing valve 24 to obtain hot water at a preset temperature. Then, this hot water is supplied and supplied to the bathtub 51 through the bath water circulation circuit 80. Then, after filling the bathtub 51, the bath circulation pump 84 is operated every predetermined time to circulate the bathtub water in the bathtub 51 into the bath water circulation circuit 80, and the temperature of the bath water is adjusted by the bath circulation thermistor 85. Detect and monitor whether there is a need for heat insulation, that is, a chasing action.

  When the temperature of the bath water drops below the set temperature, the reheating operation is automatically performed, and the reheating operation is also performed by a manual operation such as a remote control. In the reheating operation, first, the bath circulation pump 84 is operated, and the bath water is taken into the bath water circulation circuit 80 and circulated to the bath heat exchanger 42. In this state, by operating the bath primary pump 44, the hot water in the hot water storage tank 11 is taken out through the take-out pipe 41 and sent to the bath heat exchanger 42. Then, heat is exchanged between the hot water from the hot water storage tank 11 and the bathtub water from the bathtub 51 by the bath heat exchanger 42, and the bath water whose temperature has been raised by this heat exchange is set to a certain temperature or higher by the bath heat exchanger thermistor 87. The number of rotations of the bath primary pump 44 is increased or decreased and returned to the bathtub 51, and the hot water temperature in the bathtub 51 is increased. The hot water taken out to the take-out pipe 41 is taken out by adjusting the mixing ratio between the hot water in the upper part of the hot water storage tank 11 taken out from the take-out pipe 41 and the hot water directly supplied from the heat pump unit 13. Further, the hot water from the hot water storage tank 11 whose temperature has dropped through the bath heat exchanger 42 is returned to the hot water storage tank 11 through the intake pipe 43.

  Next, the remote controllers 90 and 92 will be described. The kitchen remote controller 90 is installed in a kitchen, for example, and is connected to the hot water supply control unit 38 so as to be electrically communicable. That is, the kitchen remote controller 90 is a remote operation device for remotely operating the heat pump unit 13 and the hot water storage tank unit 20. Each of the remote controllers 90 and 92 has a display panel 901 and an operation unit (not shown) such as a cross key.

  FIG. 2 shows a partial display example of the menu screen displayed on the display panel 901 of the bath remote controller 92. This menu screen includes “pipe cleaning”, “high temperature hot water”, “sashi water”, “drainage”, “next”, “tashiyu”, “bath time news”, “return”, “bath alternate” A display such as “Circulation” is displayed. The user can select a desired function by operating the operation unit. Each of the remote controllers 90 and 92 is a remote control unit capable of setting an alternating switching operation for alternately flowing out bath water or hot water from the first connection port 51a and the second connection port 51b.

  The hot water supply control unit 38 of the hot water supply apparatus 10 heats the bath heat exchanger 42 when the “alternate circulation” displayed on the display panel 901 of the bath remote control 92 is selected by the user operation during the following heat retaining operation. The bath alternate circulation operation is performed in which the bath water thus discharged is alternately discharged from the first connection port 51 a and the second connection port 51 b provided in the bathtub 51.

(1) When a user's bathing is detected by a sensor and a heat retaining operation is performed (2) When a heat retaining operation is performed by additional cooking operation (3) When a heat retaining operation is performed periodically 3 is a flowchart showing a process during the alternate alternating circulation operation. When the hot water supply control unit 38 of the hot water supply apparatus 10 receives, for example, a signal indicating that alternate bath circulation has been selected from the bath remote controller 92 during the heat retaining operation by the additional cooking operation, FIG. The processing shown in is performed. In addition, each control step in the flowchart of each drawing comprises the various function parts which the hot water supply control part 38 has.

  First, the hot water supply control unit 38 operates the bath circulation pump 84 to circulate the bath water in the bathtub 51 into the bath water circulation circuit 80 (S100).

  Next, the first flow path switching unit 81 and the second flow path switching unit 86 are controlled so that the bathtub water flows out from the first connection port 51a to the bathtub 51 (S102). Specifically, the first flow path switching unit 81 is set so that the bath water flowing out from the bath heat exchanger 42 to the fourth pipe 804 flows to the first pipe 801. Furthermore, the second flow path switching unit 86 is controlled so that the bathtub water flowing out from the first connection port 51 a in the bathtub 51 to the first pipe 801 flows to the third pipe 803.

  As a result, as indicated by an arrow R1 in FIG. 4, the bathtub water in the bathtub 51 is taken into the second pipe 802 from the second connection port 51b, and the bathtub water taken into the second pipe 802 is taken as the second flow path. The bath water flowing into the third pipe 803 by the switching unit 86 and flowing into the third pipe 803 is heated by the bath heat exchanger 42. Then, the bath water heated by the bath heat exchanger 42 flows into the fourth pipe 804, and the bath water that flows into the fourth pipe 804 flows into the first pipe 801 by the first flow path switching unit 81, and the first The bathtub water that has flowed into the pipe 801 flows into the bathtub 51 from the first connection port 51a.

  Next, the hot water supply control unit 38 determines whether or not a predetermined time X (seconds) has elapsed (S104). The hot water supply control unit 38 has a timer, and whether or not a predetermined time X (seconds) has elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S102. Determine whether.

  Here, if the predetermined time X (seconds) has not elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S102, the control of S102 is continued.

  In addition, when a predetermined time X (seconds) has elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S102, the bath is then transferred from the second connection port 51b to the bathtub 51. The first flow path switching unit 81 and the second flow path switching unit 86 are controlled so that water flows out (S106). Specifically, the first flow path switching unit 81 is controlled so that the bath water flowing out from the bath heat exchanger 42 to the fourth pipe 804 flows to the second pipe 802. Further, the second flow path switching unit 86 is controlled so that the bathtub water flowing out from the second connection port 51 a in the bathtub 51 to the second pipe 802 flows to the third pipe 803.

  Accordingly, as shown by an arrow R2 in FIG. 5, the bathtub water in the bathtub 51 is taken into the first pipe 801 from the first connection port 51a, and the bathtub water taken into the first pipe 801 is the second flow path. The bath water flowing into the third pipe 803 by the switching unit 86 and flowing into the third pipe 803 is heated by the bath heat exchanger 42. Then, the bath water heated by the bath heat exchanger 42 flows into the fourth pipe 804, and the bath water that flows into the fourth pipe 804 flows into the second pipe 802 by the first flow path switching unit 81, and the second The bathtub water that has flowed into the pipe 802 flows into the bathtub 51 from the second connection port 51b.

  Next, the hot water supply control unit 38 determines whether or not a predetermined time Y (seconds) has elapsed (S108). The hot water supply control unit 38 determines whether or not a predetermined time Y (seconds) has elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S106.

  Here, if the predetermined time Y (seconds) has not elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S106, the control of S106 is continued.

  Further, when a predetermined time Y (seconds) has elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S106, it is next determined whether or not the target temperature has been reached. (S110). Specifically, the temperature of the bath water is detected by the bath chase thermistor 85, and if the temperature of the bath water detected by the bath chase thermistor 85 has not reached the target temperature, the process returns to S102. Thus, the bath water heated by the bath heat exchanger 42 flows out alternately from the first connection port 51a and the second connection port 51b provided in the bathtub 51.

  If the temperature of the bath water detected by the bath reheating thermistor 85 has reached the target temperature, the operation of the bath circulation pump 84 is stopped and the present process is terminated.

  As described above, the hot water supply device 10 includes the tank 11 that stores hot water, the bath heat exchanger 42 that heats the bathtub water stored in the bathtub 51 and the hot water stored in the tank 51 to heat the bathtub water, The 1st piping 801 connected to the 1st connection port 51a provided in the bathtub 51, and the 2nd piping 802 connected to the 2nd connection port 51b provided in the bathtub 51 are provided. Furthermore, the hot water supply device 10 passes through the first flow path for allowing the bath water heated by the bath heat exchanger 42 to flow into the bathtub from the first connection port through the first pipe and the second pipe. A flow path switching unit that alternately switches between the second flow path that flows out from the second connection port into the bathtub is provided.

  According to such a configuration, the bath water heated by the bath heat exchanger 42 flows out alternately into the bathtub 51 from the first connection port 51a and the second connection port 51b. Can be improved.

  The hot water supply apparatus 10 includes a third pipe 803 connected to the bath water inlet of the bath heat exchanger 42 and a fourth pipe 804 connected to the bath water outlet of the bath heat exchanger 42. I have. In addition, the flow path switching unit is configured to switch between a flow path for flowing bathtub water flowing out from the bath heat exchanger 42 to the fourth pipe 804 to the first pipe 801 and a flow path to flow to the second pipe 802. A flow path switching unit 81 is provided. Furthermore, the flow path switching unit includes a flow path for flowing bathtub water that has flowed from the first connection port 51 a in the bathtub 51 to the first pipe 801 to the third pipe 803, and a second connection port 51 b in the bathtub 51. A second flow path switching unit 86 that switches the bathtub water that has flowed out to the second pipe 802 to a flow path that flows to the third pipe 803 is provided.

  And the hot water supply control part 38 controls the 1st flow-path switching part 81 so that the bathtub water which flowed out from the bath heat exchanger 42 to the 4th piping 804 may flow into the 1st piping 801, and 1st connection in the bathtub 51 The second flow path switching unit 86 is controlled so that the bathtub water flowing out from the port 51a to the first pipe 801 flows into the third pipe 803. Furthermore, the hot water supply control unit 38 controls the first flow path switching unit 81 so that the bathtub water flowing out from the bath heat exchanger 42 to the fourth pipe 804 flows into the second pipe 802 and the second connection in the bathtub 51. The second flow path switching unit 86 is controlled so that the bathtub water flowing out from the port 51b to the second pipe 802 flows into the third pipe 803 (S106). In this way, the hot water supply control unit 38 can alternately circulate the bath water that has flowed out of the bathtub 51 between the first connection port 51 a and the second connection port 51 b to flow into the bathtub 51.

  The bath heat exchanger 42 is provided between the third pipe 803 and the fourth pipe 804. Further, a bath water level sensor 82, a bath circulation sensor 83, a bath reheating thermistor 85, a pump 84, and a bath reheating temperature sensor 87 are provided in the third pipe 803 or the fourth pipe 804.

  Thereby, even if the circulation direction of bathtub water is switched by the 1st flow path switching part 81 and the 2nd flow path switching part 86, bath water can be heated by the bath heat exchanger 42, and a new sensor etc. Without providing, it is possible to detect the pressure of the bathtub water, the water level of the bathtub water, the presence or absence of circulation of the bathtub water, the temperature of the bath water flowing out of the bath heat exchanger 42, and the like.

  In addition, a bath remote controller 92 capable of setting an alternate switching operation for alternately flowing out bathtub water from the first connection port 51 a and the second connection port 51 b is provided. Is set, the first flow path switching unit 81 and the second flow path switching unit 86 are controlled so that the bath water or the hot water is alternately discharged from the first connection port 51a and the second connection port 51b. In this way, the bath remote controller 92 can be operated to cause the bath water or hot water to flow out alternately from the first connection port 51a and the second connection port 51b.

(Second Embodiment)
A water heater 10 according to a second embodiment of the present invention will be described with reference to FIGS. The configuration of the hot water supply apparatus 10 of the present embodiment is the same as the hot water supply apparatus 10 of the first embodiment. The hot water supply apparatus 10 of this embodiment differs in the process of the hot water supply control part 38 compared with the hot water supply apparatus 10 of the said 1st Embodiment.

  The hot water supply control unit 38 of the hot water supply apparatus 10 performs automatic hot water filling to the bathtub and alternate pouring operation in accordance with a user operation. When a signal instructing automatic hot water filling from the bath remote controller 92 to the bathtub 51 is input from the bath remote controller 92, the hot water supply control unit 38 of the hot water supply apparatus 10 performs the processing shown in FIG.

  First, as shown by an arrow R3 in FIG. 7, the hot water supply control unit 38 first and second flow path switching units 81 and 2 so that hot water flows into the bathtub 51 from both the first connection port 51a and the second connection port 51b. The flow path switching unit 86 is controlled (S200). Specifically, the first flow path switching unit 81 is controlled such that hot water flows from the fourth pipe 804 to the first pipe 801 and hot water flows from the fourth pipe 804 to the second pipe 802. Further, the second channel switching unit 86 is closed so that the hot water does not flow through the second channel switching unit 86.

  Next, the bath solenoid valve 71 is opened (S201). As a result, hot water in the hot water storage tank 11 is pushed out by the water supply pressure, and hot water from the hot water storage tank 11 and water supplied from the city water inflow pipe 21 are mixed through the hot water supply pipe 27 by the bath mixing valve 24 and hot water having a predetermined temperature. It becomes. The hot water mixed in the bath mixing valve 24 passes through the bath electromagnetic valve 71, joins the third pipe 803 at the joining portion 803 a of the third pipe 803, and flows into the bath heat exchanger 42 and the fourth pipe 804. . The hot water stored in the fourth pipe 804 flows into the bathtub 51 through the first pipe 801 and the first connection port 51a, and passes through the second pipe 802 and the second connection port 51b in the bathtub 51. Flow into.

  Next, it is determined that the mixed hot water having a predetermined flow rate has been discharged (S202). Specifically, it is determined based on the flow rate information detected by the bath flow rate counter 74 whether or not the mixed hot water having a predetermined flow rate has been discharged.

  Here, when the mixed hot water of predetermined flow rate is not discharged, it returns to S202. Further, when the mixed hot water having a predetermined flow rate is discharged, the bath electromagnetic valve 71 is closed (S204). Thereby, the mixed hot water of a predetermined flow rate accumulates in the bathtub 51, and automatic hot water filling is completed.

  Next, it is determined whether or not “high temperature hot water” displayed on the display panel 901 of the bath remote controller 92 has been selected (S206). Specifically, it is determined whether or not “high temperature hot water” has been selected based on whether or not a signal indicating that high temperature hot water has been selected from the bath remote controller 92.

  Here, if a signal indicating that hot hot water has been selected from the bath remote controller 92 is not input, the determination of S206 is repeated. In addition, when a signal indicating that hot hot water has been selected is input from the bath remote controller 92, the first flow path switching unit next pours hot water into the bathtub 51 from the first connection port 51a. 81 and the second flow path switching unit 86 are controlled (S208).

  Specifically, the first flow path switching unit 81 is configured so that the bath water flowing out from the bath heat exchanger 42 to the fourth pipe 804 flows to the first pipe 801. Moreover, the 2nd flow-path switching part 86 is closed so that the bathtub water in the bathtub 51 may not flow out into the 3rd piping 803.

  As a result, as indicated by an arrow R4 in FIG. 8, hot water that has passed through the bath electromagnetic valve 71 joins the third pipe 803 at the junction 803 and passes through the bath heat exchanger 42 to the fourth pipe 804. Flow into. Then, the hot water stored in the fourth pipe 804 flows into the bathtub 51 through the first pipe 801 and the first connection port 51a.

  Next, the hot water supply control unit 38 determines whether or not a predetermined time X (seconds) has elapsed (S210). The hot water supply control unit 38 determines whether or not a predetermined time X (seconds) has elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S208.

  If the predetermined time X (seconds) has not elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S208, the control of S210 is continued.

  In addition, when a predetermined time X (seconds) has elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S208, hot water is then supplied from the second connection port 51b to the bathtub 51. The first flow path switching unit 81 and the second flow path switching unit 86 are controlled so that water flows out (S212). Specifically, the first flow path switching unit 81 is controlled so that the bath water flowing out from the bath heat exchanger 42 to the fourth pipe 804 flows to the second pipe 802. Moreover, the 2nd flow-path switching part 86 is closed so that the bathtub water in the bathtub 51 may not flow out into the 3rd piping 803.

  As a result, as indicated by an arrow R5 in FIG. 9, hot water that has passed through the bath electromagnetic valve 71 joins the third pipe 803 at the junction 803 and passes through the bath heat exchanger 42 to the fourth pipe 804. Flow into. And the hot-water supply water which flowed into the 4th piping 804 flows out into the bathtub 51 through the 2nd piping 802 and the 2nd connection port 51b.

  Next, the hot water supply control unit 38 determines whether or not a predetermined time Y (seconds) has elapsed (S214). The hot water supply control unit 38 determines whether or not a predetermined time Y (seconds) has elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S212.

  Here, if the predetermined time Y (seconds) has not elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S212, the control of S212 is continued.

  Then, when the predetermined time Y (seconds) has elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S212, it is next determined whether or not the target temperature has been reached. (S214). Specifically, the temperature of the bath water is detected by the bath chase thermistor 85, and if the temperature of the bath water detected by the bath chase thermistor 85 has not reached the target temperature, the process returns to S202. In this way, the hot water passing through the bath solenoid valve 71 flows out alternately from the first connection port 51 a and the second connection port 51 b provided in the bathtub 51.

  If the temperature of the bath water detected by the bath reheating thermistor 85 has reached the target temperature, the operation of the bath circulation pump 84 is stopped and the present process is terminated.

  According to the configuration described above, the hot water supply device 10 includes the third pipe (803) that has the junction (803a) that joins the hot water in the tank and that is connected to the bath water inlet of the heat exchanger, And a fourth pipe (804) connected to the outlet of bathtub water in the exchanger. In addition, when the hot water supply control unit 38 pours hot water in the tank into the bathtub, the flow path for flowing the hot water that has joined the third pipe from the merge section to the first pipe and the flow path for flowing the second pipe to the second pipe And a first flow path switching unit (81) that switches to Furthermore, when the hot water supply control unit 38 pours the hot water in the tank into the bathtub 51, the hot water stored in the third pipe 803 from the junction 803 a passes through the bath heat exchanger 42 and the fourth pipe 804. The first flow path switching unit 81 is controlled to flow to the first pipe 801 (S208), and flows to the second pipe 802 through the bath heat exchanger 42 and the fourth pipe 804. Are controlled alternately (S212). As described above, when the hot water supply control unit 38 pours the hot water in the tank into the bathtub 51, the hot water in the tank is alternately supplied between the first connection port 51a and the second connection port 51b. Can be drained into.

  In addition, the hot water supply control unit 38, when performing automatic hot water filling to the bathtub, the first flow path switching unit 81 and the hot water supply flow into the bathtub 51 from both the first connection port 51a and the second connection port 51b. Since the 2nd flow-path switching part 86 is controlled, it is possible to complete the automatic hot water filling to a bathtub in a short time.

(Third embodiment)
A hot water supply device 10 according to a third embodiment of the present invention will be described with reference to FIGS. The configuration of the hot water supply apparatus 10 of the present embodiment is the same as the hot water supply apparatus 10 of the first embodiment. The hot water supply apparatus 10 of this embodiment differs in the process of the hot water supply control part 38 compared with the hot water supply apparatus 10 of the said 1st Embodiment.

  When a signal for instructing pipe cleaning is input from the bath remote controller 92, the hot water supply control unit 38 of the hot water supply apparatus 10 performs the process shown in FIG.

  First, the hot water supply control unit 38 opens the bath electromagnetic valve 71 (S300). As a result, the city water passes through the water supply pipe 15, the bath mixing valve 24, and the bath electromagnetic valve 71 due to the water supply pressure, and joins the third pipe 803 at the junction 803 a of the third pipe 803, and the bath heat exchanger 42, It flows into 4 pipes 804.

  Next, the first flow path switching unit 81 and the second flow path switching unit 86 are controlled so that the water from the city water inflow pipe 21 flows through the flow path shown in the pattern 1 represented by the arrow P1 in FIG. (S302). Specifically, the first flow path switching unit 81 is controlled so that water flows from the fourth pipe 804 to the first pipe 801. Further, the second channel switching unit 86 is closed so that the hot water does not flow through the second channel switching unit 86. Thereby, the pipe on the side of the bath heat exchanger 42 from the junction 803a of the third pipe 803 and the pipes of the fourth pipe 804 and the first pipe 801 are washed with water.

  Next, it is determined whether or not a predetermined time A (seconds) has elapsed (S304). The hot water supply control unit 38 determines whether or not a predetermined time A (seconds) has elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S302.

  Here, if the predetermined time A (seconds) has not elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S302, the control of S302 is continued.

  In addition, when a predetermined time A (seconds) has elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S302, this is represented by an arrow P2 in FIG. The first flow path switching unit 81 and the second flow path switching unit 86 are controlled so that water flows through the flow path shown in the pattern 2 (S306). Specifically, the first flow path switching unit 81 is controlled so that water flows from the fourth pipe 804 to the first pipe 801. In addition, the 2nd flow-path switching part 86 continues a closed state. Thereby, the pipe on the side of the bath heat exchanger 42 from the junction 803a of the third pipe 803 and the pipes of the fourth pipe 804 and the second pipe 802 are washed with water.

  Next, it is determined whether or not a predetermined time B (seconds) has elapsed (S308). The hot water supply control unit 38 determines whether or not a predetermined time B (seconds) has elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S306.

  Here, if the predetermined time B (seconds) has not elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S306, the control of S306 is continued.

  Further, when a predetermined time B (seconds) has elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S306, this is represented by an arrow P3 in FIG. The first channel switching unit 81 and the second channel switching unit 86 are controlled so that water flows through the channel shown in the pattern 3 (S310). Specifically, the first channel switching unit 81 is closed so that water does not flow through the first channel switching unit 81. Further, the second flow path switching unit 81 is controlled so that water flows from the junction 803a of the third pipe 803 to the second pipe 802. Thereby, the piping from the confluence | merging part 803a of the 3rd piping 803 to the 2nd flow-path switching part 86 side, and the piping between the 2nd flow-path switching part 86 and the 2nd connection port 51b are wash | cleaned with water.

  Next, it is determined whether or not a predetermined time C (seconds) has elapsed (S312). The hot water supply control unit 38 determines whether or not a predetermined time C (seconds) has elapsed since the start of the control of the first channel switching unit 81 and the second channel switching unit 86 in S310.

  If the predetermined time C (seconds) has not elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S310, the control of S310 is continued.

  Further, when a predetermined time C (seconds) has elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S310, next, it is represented by an arrow P4 in FIG. The first flow path switching unit 81 and the second flow path switching unit 86 are controlled so that water flows through the flow path shown in the pattern 4 (S314). Specifically, the first flow path switching unit 81 continues the closed state. Further, the second flow path switching unit 81 is controlled so that water flows from the junction 803a of the third pipe 803 to the first pipe 801. Thereby, the piping from the confluence | merging part 803a of the 3rd piping 803 to the 2nd flow-path switching part 86 side, and the piping between the 2nd flow-path switching part 86 and the 1st connection port 51a are wash | cleaned with water.

  Next, it is determined whether or not a predetermined time D (seconds) has elapsed (S316). The hot water supply control unit 38 determines whether or not a predetermined time D (seconds) has elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S314.

  Here, when the predetermined time D (seconds) has not elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S314, the control of S314 is continued.

  Further, when a predetermined time D (seconds) has elapsed since the start of the control of the first flow path switching unit 81 and the second flow path switching unit 86 in S314, it is next determined whether or not the target temperature has been reached. (S318). Specifically, the temperature of the bath water is detected by the bath chase thermistor 85, and if the temperature of the bath water detected by the bath chase thermistor 85 has not reached the target temperature, the process returns to S302. If the temperature of the bath water detected by the bath reheating thermistor 85 has reached the target temperature, the operation of the bath circulation pump 84 is stopped and the present process is terminated.

  As described above, when the hot water supply control unit 38 cleans the first pipe 801 to the fourth pipe 804, the first flow path switching is performed so that water flows through all the flow paths of the first pipe 801 to the fourth pipe 804. The unit 81 and the second flow path switching unit 86 are controlled. In this way, by controlling the first flow path switching unit 81 and the second flow path switching unit 86, it is possible to clean all the flow paths of the first pipe 801 to the fourth pipe 804.

(Fourth embodiment)
A hot water supply apparatus 10 according to a fourth embodiment of the present invention will be described with reference to FIGS. 15 and 16. The hot water supply device 10 according to the first embodiment is configured to allow the bath water to flow out into the bathtub 51 alternately from the first connection port 51a and the second connection port 51b using the two flow path switching units 81 and 86. On the other hand, the hot water supply device 10 of the present embodiment causes the bath water to flow out into the bathtub 51 alternately from the first connection port 51a and the second connection port 51b by using one flow path switching unit 88.

  The flow path switching unit 88 is an electric four-way valve connected to the first pipe 801, the second pipe 802, the third pipe 803, and the fourth pipe 804.

  FIG. 15 shows the bathtub water flowing out from the first connection port 51a to the first piping 801 through the third piping 803, the bath heat exchanger 42, the fourth piping 804, and the second piping 802 from the second connection port 51b. It is the figure which showed the state of the flow-path switching part 88 at the time of making it flow in into 51.

  FIG. 16 shows the bathtub water flowing out from the second connection port 51b to the second piping 802 through the third piping 803, the bath heat exchanger 42, the fourth piping 804, and the first piping 801 from the first connection port 51a. It is the figure which showed the state of the flow-path switching part 88 at the time of making it flow in into 51.

  That is, the hot water supply control unit 38 causes the bathtub water that has flowed out of the bath heat exchanger 42 to the fourth pipe 804 to flow into the first pipe 801 and the bathtub that has flowed out of the second connection port 51b in the bathtub 51 into the second pipe 802. The state in which water flows to the third pipe 803 and the bathtub water that has flowed out of the bath heat exchanger 42 to the fourth pipe 804 flow to the second pipe 802 and the first pipe 801 from the first connection port 51a in the bathtub 51. The flow path switching unit 88 is controlled so as to alternately switch the state in which the bathtub water that has flowed out to the third pipe 803 flows.

  In the present embodiment, the same effect obtained from the configuration common to the first embodiment can be obtained as in the first embodiment.

  In addition, as described above, in one flow path switching unit 88, the bath water heated by the bath heat exchanger 42 passes through the first pipe 801 and flows out from the first connection port 51a into the bathtub 51. It is possible to configure a flow path switching unit that alternately switches between one flow path and the second flow path that passes through the second pipe 802 and flows out from the second connection port 51b into the bathtub 51, thereby reducing costs. Can be planned.

(Other embodiments)
(1) In each of the above embodiments, the bath water level sensor 82, the bath circulation sensor 83, the bath circulation thermistor 85, and the bath circulation pump 84 are provided in the third pipe 803, but all of them are not necessarily provided in the third pipe 803. There is no need to provide it.

  (2) In the second embodiment, when “high temperature hot water” is selected, the hot water supplied through the bath solenoid valve 71 is connected to the first connection port 51 a provided in the bathtub 51 and the second connection. It constituted so that it might flow out alternately from mouth 51b. On the other hand, when “additional hot water” is selected, hot water passing through the solenoid valve 71 for bath flows out alternately from the first connection port 51a and the second connection port 51b provided in the bathtub 51. It may be configured.

  (3) In the third embodiment, the first pipe 801 to the fourth pipe 804 are washed with water from the city water inflow pipe 21, but hot water stored in the tank or hot water You may make it perform piping washing | cleaning of the 1st piping 801-the 4th piping 804 with the mixed water which mixed city water, or the hot water stored in the tank.

  (4) In the first embodiment, “pipe cleaning”, “high temperature hot water”, “sashi water”, “drainage”, “next”, “tashi hot water” displayed on the display panel 901 of the bath remote controller 92. ”,“ Furo time news ”,“ Return ”,“ Further alternating circulation ”, and so on. On the other hand, the same display may be performed on the kitchen remote controller 90, and a desired function may be selected according to this display.

  (5) In each of the above embodiments, the bath water level sensor 82, the bath circulation sensor 83, the bath reheating thermistor 85, the pump 84, and the bath reheating temperature sensor 87 are provided in the third pipe 803 or the fourth pipe 804. However, at least one of the bath water level sensor 82, the bath circulation sensor 83, the bath chase thermistor 85, the pump 84, and the bath chase temperature sensor 87 may be provided in the third pipe 803 or the fourth pipe 804.

  In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes. Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case. In each of the above embodiments, when referring to the material, shape, positional relationship, etc. of the constituent elements, etc., unless otherwise specified, or in principle limited to a specific material, shape, positional relationship, etc. The material, shape, positional relationship, etc. are not limited.

(Summary)
-According to the 1st viewpoint shown by one part or all part of the said embodiment, a hot water supply apparatus is a tank (11) which stores hot water, the bathtub water stored in the bathtub (51), and the hot water in a tank. The heat exchanger (42) which heat-exchanges water and heats bathtub water is provided. Moreover, the 1st piping (801) connected to the 1st connection port (51a) provided in the bathtub, The 2nd piping (802) connected to the 2nd connection port (51b) provided in the bathtub, It has. Furthermore, the 1st flow path which makes the bathtub water heated with the heat exchanger flow out in a bathtub from a 1st connection port through a 1st piping, a 2nd piping, and the inside of a bathtub from a 2nd connection port There are provided flow path switching units (81, 86, 38) for alternately switching the second flow path to flow out into the flow path.

  -According to the 2nd viewpoint shown by the one part or all part of the said embodiment, a hot water supply apparatus is the 3rd piping (803) connected to the inflow port of the bathtub water in a heat exchanger, and a heat exchanger. A fourth pipe (804) connected to the outlet of the bathtub water. The flow path switching unit is a first flow path switching unit (81 for switching between a flow path for flowing bathtub water flowing out from the heat exchanger to the fourth pipe to the first pipe and a flow path for flowing to the second pipe. ). Further, the flow path switching unit is configured to flow the bathtub water that has flowed out from the first connection port in the bathtub to the first pipe to the third pipe, and the bathtub that has flowed out from the second connection port in the bathtub to the second pipe. A second flow path switching unit (86) that alternately switches water to the flow path to the third pipe is provided. Furthermore, the bathtub water that flows out from the heat exchanger to the fourth pipe is controlled in the first flow path switching unit so as to flow to the first pipe, and the bathtub water that has flowed out from the first connection port in the bathtub to the first pipe, The second flow path switching unit is controlled to flow to the third pipe (S102), and the first flow path switching unit is controlled to flow the bathtub water flowing out from the heat exchanger to the fourth pipe to the second pipe. And a control unit (38) that alternately controls the second flow path switching unit so that the bathtub water flowing out from the second connection port in the bathtub to the second pipe flows to the third pipe (S106); It is equipped with. Thus, the control part can be made to circulate the bathtub water which flowed out from the inside of a bathtub alternately between a 1st connection port and a 2nd connection port, and to make it flow out in a bathtub.

  -According to the 3rd viewpoint shown by the one part or all part of the said embodiment, a hot water supply apparatus has the junction part (803a) which joins the hot water stored in a tank, and the inflow port of the bathtub water in a heat exchanger 3rd piping (803) connected to, and 4th piping (804) connected to the outflow port of the bathtub water in a heat exchanger. Further, the flow path switching unit passes the heat storage water that has joined the third pipe from the junction part to the first pipe through the heat exchanger and the fourth pipe, and the heat exchanger and the fourth pipe. A first flow path switching unit (81) that switches to a flow path that flows to the second pipe. Furthermore, when pouring hot water in the tank into the bathtub, the first flow path switching unit is configured to flow the hot water that has joined the third pipe from the junction into the first pipe through the heat exchanger and the fourth pipe. A control unit (38) that alternately controls (S208), and controls the first flow path switching unit to flow through the heat exchanger and the fourth pipe to the second pipe (S212). It is equipped with. Thus, when the hot water stored in the tank is poured into the bathtub, the control unit can cause the hot water stored in the tank to alternately flow out into the bathtub between the first connection port and the second connection port. it can.

  -According to the 4th viewpoint shown by the one part or all part of the said embodiment, when a control part wash | cleans 1st piping-4th piping, it distributes to all the flow paths of 1st piping-4th piping. The first flow path switching unit and the second flow path switching unit are controlled so that the hot water is circulated (S302, S306, S310, S314). In this way, by controlling the first flow path switching unit 81 and the second flow path switching unit 86, it is possible to clean all the flow paths of the first pipe 801 to the fourth pipe 804.

  -According to the 5th viewpoint shown by a part or all of the above-mentioned embodiment, the heat exchanger is provided between the 3rd piping and the 4th piping. In addition, at least one of a water level sensor (82), a bath water flow sensor (83), a temperature sensor (85), a pump (84), and a bath reheating temperature sensor (87) is provided in the third pipe or the fourth pipe. Yes. Here, the water level sensor (82) is a sensor that detects the pressure of the bath water flowing through the third pipe and outputs information indicating the water level of the bath water. The bath water flow sensor (83) is the third pipe. It is a sensor which detects whether bathtub water is circulating in the direction of the heat exchanger side. A temperature sensor (85) is a sensor which detects the temperature of the bath water which distribute | circulates the inside of 3rd piping, and a pump (84) circulates the bath water of a bathtub in the direction returned to a bathtub via a heat exchanger. It is a pump. The bath reheating temperature sensor (87) is a temperature sensor that detects the temperature of the bath water flowing out of the heat exchanger. According to this, even if the circulation direction of bathtub water is switched by the first channel switching unit and the second channel switching unit, the bath water can be heated by the heat exchanger, and a new sensor or the like is provided. In addition, the pressure of the bathtub water, the water level of the bathtub water, the presence or absence of the circulation of the bathtub water, and the like can be detected.

  -According to the 6th viewpoint shown by the one part or all part of the said embodiment, a hot water supply apparatus is in the 3rd piping (803) connected to the inflow port of the bathtub water in a heat exchanger, and a heat exchanger. A fourth pipe (804) connected to the outlet of the bathtub water. Moreover, the flow path switching unit causes the bathtub water that has flowed out of the heat exchanger to the fourth pipe to flow to the first pipe and the bathtub water that has flowed out of the second connection port in the bathtub to the second pipe. A state of flowing, and a state in which the bathtub water that has flowed out of the heat exchanger to the fourth pipe flows into the second pipe and the bathtub water that has flowed out of the first connection port in the bathtub into the first pipe, It is the 3rd flow-path switching part (88) which switches. As described above, the first flow path for causing the bathtub water heated by the heat exchanger to flow out from the first connection port into the bathtub through one third flow path switching unit, and the second It is possible to configure a flow path switching unit that alternately switches between the second flow path that passes through the piping and flows out into the bathtub from the second connection port, and it is possible to reduce the cost.

  -According to the seventh aspect shown in a part or all of the above embodiment, it is possible to set an alternate switching operation in which bath water or hot water is alternately discharged from the first connection port and the second connection port. And the control unit includes a first flow path switching unit and a first flow path switching unit so that the bath water or the hot water is alternately discharged from the first connection port and the second connection port when the alternate switching operation is set by the operation unit. The second flow path switching unit is controlled. In this way, it is possible to cause the bath water or hot water to flow out alternately from the first connection port and the second connection port by operating the operation unit.

DESCRIPTION OF SYMBOLS 10 Hot water supply apparatus 11 Hot water storage tank 42 Bath heat exchanger 51 Bathtub 81 1st flow-path switching part 86 2nd flow-path switching part 84 Bath circulation pump 51a 1st connection port 51b 2nd connection port 801 1st piping 802 2nd piping 803 3rd piping 804 4th piping

Claims (7)

Hot water supply comprising a tank (11) for storing hot water, and a heat exchanger (42) for heating the bathtub water by exchanging heat between the bathtub water stored in the bathtub (51) and the hot water in the tank. A device,
A first pipe (801) connected to a first connection port (51a) provided in the bathtub;
A second pipe (802) connected to a second connection port (51b) provided in the bathtub;
A first flow path through which the bath water heated by the heat exchanger passes through the first pipe and flows out from the first connection port into the bathtub, and the second pipe through the second pipe. The hot water supply apparatus provided with the flow-path switching part (81, 86, 38) which switches the 2nd flow path made to flow out in the said bathtub from a connection port alternately. A third pipe (803) connected to an inlet of the bathtub water in the heat exchanger;
A fourth pipe (804) connected to the outlet of the bathtub water in the heat exchanger,
The flow path switching unit is
A first flow path switching unit (81) for switching the flow of the bathtub water that has flowed out of the heat exchanger to the fourth pipe to a flow path that flows to the first pipe and a flow path that flows to the second pipe;
The bath water that has flowed out from the first connection port in the bathtub to the first pipe, the flow path that flows to the third pipe, and the flow out from the second connection port in the bathtub to the second pipe A second flow path switching unit (86) that alternately switches the bath water to the flow path that flows to the third pipe;
The first flow path switching unit is controlled so that the bathtub water flowing out from the heat exchanger to the fourth pipe flows into the first pipe, and flows out from the first connection port in the bathtub to the first pipe. The second flow path switching unit is controlled to flow the bathtub water to the third pipe (S102), and the bathtub water flowing out from the heat exchanger to the fourth pipe is transferred to the second pipe. The first flow path switching unit is controlled to flow, and the second flow path switching unit is controlled to flow the bathtub water flowing out from the second connection port in the bathtub to the second pipe to the third pipe. (S106) and the control part (38) which performs alternately (H106), The hot-water supply apparatus of Claim 1 provided with. A third pipe (803) having a junction (803a) for joining the hot water stored in the tank and connected to an inlet of the bath water in the heat exchanger;
A fourth pipe (804) connected to the outlet of the bathtub water in the heat exchanger;
The flow path switching unit includes a flow path for flowing the hot water pooled from the merging unit to the third pipe to the first pipe through the heat exchanger, the fourth pipe, and the heat exchanger. A first flow path switching unit (81) that switches to a flow path that flows to the second pipe through the fourth pipe;
When the hot water stored in the tank is poured into the bathtub, the hot water that has joined the third pipe from the joining section flows to the first pipe through the heat exchanger and the fourth pipe. Controlling the first flow path switching unit (S208), and controlling the first flow path switching unit to flow through the heat exchanger and the fourth pipe to the second pipe (S212). The hot-water supply apparatus of Claim 1 provided with the control part (38) which performs alternately.   The controller, when washing the first pipe to the fourth pipe, causes the stored hot water to flow through all the channels of the first pipe to the fourth pipe, and The hot-water supply apparatus of Claim 3 which controls a 2nd flow-path switching part (S302, S306, S310, S314). The heat exchanger is provided between the third pipe and the fourth pipe,
A water level sensor (82) for detecting the pressure of the bathtub water flowing through the third pipe and outputting information indicating the water level of the bathtub water, and the bathtub water in a direction toward the heat exchanger of the third pipe A bath water flow sensor (83) for detecting whether or not the water is flowing, a temperature sensor (85) for detecting the temperature of the bath water flowing in the third pipe, and the bath water in the bath as the heat exchanger At least one of a pump (84) that circulates in a direction to return to the bathtub via the heat exchanger and a bath reheating temperature sensor (87) that detects the temperature of the bath water flowing out of the heat exchanger is the third pipe or the second pipe. The hot-water supply apparatus of Claim 1 or 2 provided in 4 piping. A third pipe (803) connected to an inlet of the bathtub water in the heat exchanger;
A fourth pipe (804) connected to the outlet of the bathtub water in the heat exchanger,
The flow path switching unit is
The bathtub water that has flowed out of the heat exchanger to the fourth pipe flows into the first pipe, and the bathtub water that has flowed out of the second connection port in the bathtub into the second pipe is used as the third pipe. The bath water flowing out from the heat exchanger to the fourth pipe and flowing into the second pipe and the bath water flowing out from the first connection port in the bathtub to the first pipe The hot water supply device according to claim 1, which is a third flow path switching unit (88) for switching between a state of flowing into the third pipe. A remote control unit (90, 92) capable of setting an alternate switching operation for alternately flowing out the bathtub water or the hot water from the first connection port and the second connection port;
When the alternate switching operation is set by the remote operation unit, the control unit causes the first flow path to alternately flow out the bathtub water or the hot water from the first connection port and the second connection port. The hot water supply apparatus according to claim 1, wherein the switching unit and the second flow path switching unit are controlled.

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