JP2011012891A - Bath device and bathtub circulating tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bath device preventing outflow of high temperature bathtub water to inside of a bathtub to prevent uncomfortable feeling of a bathing person during reheating of the bathtub water.SOLUTION: The bath device includes: a bath circulating circuit 30 formed by interconnecting the bathtub 4 and a bath heat exchanger 27 by a bath going pipe 28 and a bath return pipe 29; a temperature detection means 32 for detecting the temperature of the bathtub water made to flow from the bath heat exchanger 27 toward the bathtub 4; a bathtub bypass pipe 35 communicating the bath going pipe 28 with the bath return pipe 29 and bypassing the bathtub 4; and a flow passage switching means 36 capable of switching at least to a first state for making the bathtub water heated by the bath heat exchanger 27 flow in a bathtub bypass pipe 35 to bypass the bathtub 4 and a second state for making the bathtub water heated by the bath heat exchanger 27 flow in to the bathtub 4 without change. The bath device reheats the bathtub water to a reheating target temperature. During reheating, when a detection temperature by the temperature detection means 32 exceeds a first temperature higher than the reheating target temperature, the flow passage switching means 36 is switched to the first state.

Description

  The present invention relates to a bath apparatus and a circulator for a bathtub that prevent hot bath water from flowing into the bathtub when the bath water is replenished.

  Conventionally, in this type of bath apparatus, as shown in FIG. 5, a bath 101, a bath heat exchanger 102 for heating bath water, a heating means 103 for heating the bath heat exchanger 102, a bath 101 and bath heat A bath outlet pipe 104, a bath return pipe 105, a bath circulation pump 106 provided in the bath return pipe 105, and a temperature sensor 107 that detects the temperature of the bath water from the bath heat exchanger 102 toward the bathtub 101. And a bathtub bypass pipe 108 that connects the bath outlet pipe 104 and the bath return pipe 105 to bypass the bathtub 101, and when the bathtub water temperature detected by the temperature sensor 107 is low when the bathtub water is reheated, The bathtub bypass pipe 108 side is opened, the bathtub 101 is bypassed, the bathtub bypass pipe 108, the bath return pipe 105, the bath heat exchanger 102, and the bath outlet pipe. 04. When the bathtub water is circulated between the bathtub bypass pipes 108 and the bathtub water temperature detected by the temperature sensor 107 becomes equal to or higher than the set temperature, the bathtub 101 side is opened, and the bathtub 101, the bath return pipe 105, and the bath heat exchanger are opened. 102, a flow path switching means 109 for circulating the bath water between the bath outlet pipes 104 is provided to prevent cold water from flowing into the bathtub 101 at the start of reheating. In some cases, the path switching means 109 is provided in the circulation device for bathtubs and performs the same control as described above. (For example, refer to Patent Document 1.)

Japanese Utility Model Publication No. 5-8338

  By the way, in this conventional device, the heating means 103 for heating the bath heat exchanger 102 is called a one-can two-channel system in which a hot water supply heat exchanger and a bath heat exchanger are heated by one burner. Some use the combustion heat of the hot water heater burner. In this case, even if the reheating is not performed, if there is a hot water supply request and hot water is being used, bath heat exchange is performed with a heat exchanger for hot water supply. The vessel 102 is heated, and the bath water in the bath heat exchanger 102 is heated. Here, for example, if a hot water supply request of 60 ° C. or higher occurs, the hot water heat exchanger is heated to supply hot water, and the bath water in the bath heat exchanger 102 is also heated. Hot bath water will stay. In this state, when a reheating request is generated and reheating for heating the bath water is started, the flow path switching unit 109 detects that the bath water temperature detected by the temperature sensor 107 is the set temperature as described above. Since the bathtub 101 side is opened as described above, even if the temperature of the hot bathtub water staying in the bath heat exchanger 102 is significantly higher than the set temperature, the bathtub 101 is allowed to flow into the bathtub 101. become. At this time, if the bather was taking a bath, he suddenly touched the hot bath water, so there was a risk of feeling too uncomfortable and uncomfortable.

  In addition, there is a type in which a bath heat exchanger 102 is disposed in a hot water storage body in which high temperature hot water is stored, and high temperature hot water in the hot water storage can is used as the heating means 103. Otherwise, the bath water left in the bath heat exchanger 102 is heated to the same temperature as the hot water in the hot water storage can through heat exchange with the hot water in the hot water storage can. In this state, when a reheating request is generated and reheating for heating the bathtub water is started, hot bathtub water is caused to flow into the bathtub 101 as before. At this time, if the bather was taking a bath, he suddenly touched the hot bath water, so there was a risk of feeling too uncomfortable and uncomfortable.

  In order to solve the above-mentioned problems, the present invention is particularly configured in claim 1 and includes a bathtub, a bath heat exchanger for heating the bath water, a bath outlet pipe and a bath return pipe for the bathtub and the bath heat exchanger. A bath circulation circuit connected to and formed in the bath circulation pump, a bath circulation pump provided in the bath circulation circuit, temperature detection means for detecting the temperature of the bathtub water from the bath heat exchanger toward the bathtub, and the bath outlet pipe A bathtub bypass pipe that communicates the bath return pipe and bypasses the bathtub; and at least a first state in which the bathtub water heated by the bath heat exchanger flows through the bathtub bypass pipe and bypasses the bathtub; Flow path switching means capable of switching to the second state in which the bath water heated by the bath heat exchanger flows into the bath as it is, and circulating the bath water to the bath heat exchanger for reheating. At the target temperature In the bath apparatus configured to perform reheating in this manner, when the temperature detected by the temperature detecting means is higher than a preset first temperature higher than the reheating target temperature, the flow path switching is performed. The means is in the first state.

  According to a second aspect of the present invention, a second temperature that is higher than the target reheating temperature and lower than the first temperature is provided, and at the time of the reheating, the temperature detected by the temperature detecting means is equal to or higher than the target reheating temperature. When the temperature is lower than the temperature, the flow path switching unit is set to the second state. When the temperature detected by the temperature detection unit is equal to or higher than the second temperature and lower than the first temperature, the flow path switching unit is set to the second state. From the state of 2, the bath water that flows into the bath is reduced to a third state.

  According to a third aspect of the present invention, when the temperature detected by the temperature detecting means is lower than the target temperature at the time of reheating, the flow path switching means is set to the first state.

  According to a fourth aspect of the present invention, the flow path switching unit is made to wait in the first state when the reheating stop is performed.

  Moreover, in Claim 5, the temperature detection which detects the temperature of the bath return pipe which makes the bathtub water flow in into a bathtub, the bath return pipe which flows out the bathtub water out of the bathtub, and the bath water of the bath return pipe Means, a bath bypass pipe that communicates the bath outlet pipe and the bath return pipe, and bypasses the bathtub; and at least the bath water from the bath outlet pipe flows into the bathtub bypass pipe to bypass the bathtub. And a flow path switching means that can be switched to a second state in which the bathtub water from the bath outlet pipe flows into the bathtub as it is, and circulates the bathtub water to reach the target temperature. When the detected temperature of the temperature detecting means is higher than a preset first temperature higher than the target temperature for reheating, the flow path switching means is set to the first state. It was.

  According to a sixth aspect of the present invention, a second temperature that is higher than the target reheating temperature and lower than the first temperature is provided, and at the time of the reheating, the temperature detected by the temperature detecting means is equal to or higher than the target reheating temperature. When the temperature is lower than the temperature, the flow path switching unit is set to the second state. When the temperature detected by the temperature detection unit is equal to or higher than the second temperature and lower than the first temperature, the flow path switching unit is set to the second state. From the state of 2, the bath water that flows into the bath is reduced to a third state.

  According to a seventh aspect of the present invention, when the temperature detected by the temperature detecting means is lower than the target temperature for reheating, the flow path switching means is set to the first state.

  Further, according to the eighth aspect of the present invention, the flow path switching unit is made to stand by in the first state when the reheating stop is performed.

  According to the first aspect of the present invention, when the temperature detected by the temperature detecting means is higher than the first preset temperature higher than the target temperature for reheating, the flow path switching means bypasses the bathtub. In this state, even if the hot bath water staying in the bath heat exchanger before the start of reheating is circulated, the hot bath water does not flow into the bath bather. It is possible to provide a comfortable retreat without giving the discomfort of being too hot.

  According to claim 2, when the second temperature that is higher than the reheating target temperature and lower than the first temperature is provided, and the temperature detected by the temperature detecting means is higher than the reheating target temperature and lower than the second temperature at the time of reheating. Sets the flow path switching means to the second state, and when the detected temperature of the temperature detection means is equal to or higher than the second temperature and lower than the first temperature, the bath water that causes the flow path switching means to flow into the bathtub from the second state By setting the third state to be decreased, in the temperature range in which the bather does not feel uncomfortable, the flow path switching means can be set to the second state so that the chasing can be performed smoothly and the bather is uncomfortable. In the temperature range that is likely to give water, the flow switching means is set to the third state to reduce the amount of bath water that flows into the bath, thereby reducing the heat experienced by the bather, which is inconvenient for the bather. Comfortable follow-up without giving pleasure It is those that can provide fired.

  According to claim 3, when the temperature detected by the temperature detecting means is lower than the target temperature at the time of reheating, the flow path switching means is set to the first state for bypassing the bathtub, Since the low-temperature bath water staying in the bath circulation circuit does not flow into the bathtub, the bather does not feel uncomfortable due to the low-temperature bath water flowing into the bath. It can provide a whisper.

  According to the fourth aspect of the present invention, even when the bath circulation circuit is freeze-prevented when the reheating is stopped, the low-temperature bath water staying in the bath circulation circuit does not flow into the bathtub. Therefore, even if the bather is taking a bath at this time, there is no flow of cold bath water into the bathtub, and discomfort due to intrusion of cold bath water Is not given to bathers.

  According to claim 5, when the temperature detected by the temperature detection means is higher than a preset first temperature higher than the target temperature for reheating, the flow path switching means bypasses the bathtub. Even if hot bath water is circulated, the hot bath water is not allowed to flow into the bath so that the bather is not overheated. Can be provided.

  According to the sixth aspect of the present invention, the second temperature that is higher than the reheating target temperature and lower than the first temperature is provided, and the temperature detected by the temperature detection means is equal to or higher than the reheating target temperature and lower than the second temperature during reheating. Sets the flow path switching means to the second state, and when the detected temperature of the temperature detection means is equal to or higher than the second temperature and lower than the first temperature, the bath water that causes the flow path switching means to flow into the bathtub from the second state By setting the third state to be decreased, in the temperature range in which the bather does not feel uncomfortable, the flow path switching means can be set to the second state so that the chasing can be performed smoothly and the bather is uncomfortable. In the temperature range that is likely to give water, the flow switching means is set to the third state to reduce the amount of bath water that flows into the bath, thereby reducing the heat experienced by the bather, which is inconvenient for the bather. Comfortable follow-up without giving pleasure It is those that can provide fired.

  Further, according to claim 7, when the temperature detected by the temperature detecting means is lower than the target temperature for reheating, the flow path switching means is set to the first state for bypassing the bathtub, Since the low-temperature bath water does not flow into the bathtub, it is possible to provide a comfortable retreat without giving the bather discomfort due to the low-temperature bath water flowing into the bath.

  Moreover, according to claim 8, even when the anti-freezing operation of the bath outlet pipe and the bath return pipe is performed at the time of reheating stop, the low-temperature bath water does not flow into the bathtub. Even if the bather is taking a bath at this time, the bath water of low temperature does not flow into the bathtub, and bathing feels uncomfortable due to the intrusion of low temperature bath water. It is something that is not given to the person.

The schematic block diagram of the bath apparatus of one Embodiment of this invention. Operation | movement explanatory drawing of the three-way valve used by the same embodiment. The flowchart which shows the reheating operation of the bathtub water of the same embodiment. The schematic block diagram of the bath apparatus of other embodiment of this invention. The schematic block diagram of the bath apparatus of a prior art example.

Next, a bath apparatus according to an embodiment of the present invention will be described with reference to FIG.
1 is a hot water storage tank unit having a hot water storage tank 2 for storing hot water, 3 is a heat pump unit as a heating means for heating the hot water in the hot water storage tank 2, 4 is a bathtub, and 5 is a remote control for remotely operating the bath apparatus. .

  6 is a heat pump circulation circuit that connects the hot water storage tank 2 and the heat pump unit 3 so as to circulate. The heat pump circulation circuit 6 includes a heat pump forward pipe 7 connected to the lower part of the hot water storage tank 2 and a heat pump return pipe 8 connected to the upper part of the hot water storage tank 2. The hot water in the hot water storage tank 2 taken out from the heat pump forward pipe 7 is boiled by the heat pump unit 3 and returned from the heat pump return pipe 8 into the hot water storage tank 2 to store hot hot water. The hot water storage tank 2 has a plurality of hot water storage temperature sensors 9 as hot water storage temperature detection means in the vertical direction, and the amount of heat in the hot water storage tank 2 is determined by the temperature information detected by the hot water storage temperature sensor 9. This is to detect whether or not.

  A hot water supply pipe 10 is connected to the upper end of the hot water storage tank 2 to discharge hot water in the hot water storage tank 2, 11 is a water supply pipe connected to the lower end of the hot water storage tank 2 to supply water into the hot water storage tank 2, and 12 is hot water and water supply from the hot water storage pipe 10. A mixing valve that mixes water from the pipe 11 so as to reach a predetermined set temperature, 13 is a hot water supply pipe that supplies hot water having a set temperature mixed by the mixing valve 12, and 14 is connected to an end of the hot water supply pipe 13. It is a faucet provided in a kitchen or washroom. 15 is a hot water supply temperature sensor provided downstream of the mixing valve 12, and 16 is a hot water supply flow rate sensor for counting the amount of hot water supply. In addition, 17 is a pressure reducing valve for reducing the water pressure to a predetermined pressure, 18 is a feed water temperature sensor for detecting the temperature of the feed water, and 19 is an over pressure relief valve for releasing the over pressure of the hot water storage tank 2.

  The heat pump unit 3 includes a compressor 20 having a variable speed for compressing a refrigerant, a water refrigerant heat exchanger 21 as a condenser, an electronic expansion valve 22 as a decompression means, and air as a forced air-cooled evaporator. A heat pump circuit 24 composed of a heat exchanger 23, a heat pump circulation pump 25 provided in the heat pump forward pipe 7 for circulating hot water in the hot water storage tank 2 to the water-refrigerant heat exchanger 21, and driving thereof are controlled. And a heat-pump control unit 26.

  27 is a bath heat exchanger made of a serpentine tube for heating the bath water in the bathtub 4, and is arranged at the upper part in the hot water storage tank 2. The bath heat exchanger 27 and the bathtub 4 are connected to the bathtub. A bath circulation circuit 30 is formed by connecting a bath return pipe 29 that allows water to flow into the bathtub 4 and a bath return pipe 29 that allows the bath water to flow out of the bathtub 4, and the bath water in the bathtub 4 is stored in the hot water storage tank 2. It is heated by high-temperature hot water and retreated. 31 is a bath circulation pump that is provided in the bath circulation circuit 30 and circulates bathtub water in the bathtub 4, and 32 is a bath outlet that is provided in the bath outlet pipe 28 and detects the temperature of the bath water from the bath heat exchanger 27 toward the bathtub 4. A bath temperature sensor 33 serving as a temperature detection means is a bath return temperature sensor serving as a bath return temperature detection means provided on the bath return pipe 29 for detecting the temperature of bath water from the bathtub 4 toward the bath heat exchanger 27.

  34 is a bath-out pipe 28, a bath return pipe 29, a bath-out temperature sensor 32, and a bath circulation pump 31 near the bathtub 4 and the bath-out pipe 28 and the bath return on the bathtub 4 side of the bath-out temperature sensor 32. A bathtub bypass pipe 35 that communicates with the pipe 29 and bypasses the bathtub 4, and a three-way valve 36 as a flow path switching means provided at a connection portion between the bathtub bypass pipe 35 and the bath outlet pipe 28. This circulator 34 is provided in the vicinity of the bathtub 4. Reference numeral 37 denotes a flow path switching control unit having a microcomputer that receives the input of the bath temperature sensor 32 and controls the driving of the three-way valve 36.

  The three-way valve 36 connects the bath heat exchanger 27 side of the bath outlet tube 28 to the inflow side connection port 36 a, and one of the two outflow side connection ports 36 b and 36 c has a bathtub 4. 2 and the other connection port 36c is connected to the bathtub bypass pipe 35 side, and the inner valve body is moved by driving the stepping motor, so that a bath as shown in FIG. The bath heat exchanger 27 side and the bathtub bypass pipe 35 side of the forward pipe 28 are communicated and the bathtub 4 side is closed, and the bathtub water heated by the bath heat exchanger 27 is flowed to the bathtub bypass pipe 35 side to bypass the bathtub 4. 2, and the bath heat exchanger 27 side and the bathtub 4 side of the bath outlet pipe 28 as shown in FIG. The whole amount of heated bathtub water is directly on the bathtub 4 side 2, and all the connection ports 36 a, 36 b, 36 c as shown in FIG. 2C are opened, and the bath heat exchanger 27 side, the bathtub 4 side, and the bathtub bypass pipe 35 side of the bath outlet pipe 28. Is a special three-way valve that can be switched to the third state that reduces the amount of bathtub water flowing into the bathtub 4 from the second state, and stops reheating without retreating the bath water. Time is waiting in the first state.

  The hot water supply pipe 38 is branched from the middle of the hot water supply pipe 13 and connected to the bath return pipe 29 for pouring hot water into the bathtub 4, and 39 is provided in the hot water hot water pipe 38 to start and stop pouring of water into the bathtub 4. A hot water filling valve 40, a bath flow sensor 40 for counting the amount of pouring water into the bathtub 4, and a double check valve 41 for preventing the bath water in the bathtub 4 from flowing backward.

  The remote controller 5 is provided with a hot water supply temperature setting switch 42 for setting the hot water supply set temperature and a bath temperature setting switch 43 as a bath temperature setting means for setting the bath set temperature. The hot water filling amount set by a hot water filling amount setting switch (not shown) of the remote controller 5 is filled with the hot water filling amount set by the bath temperature setting switch 43 or a temperature higher by about 1 to 2 ° C. than the bath setting temperature. The bath automatic switch 44 for keeping warm for a predetermined time and the reheating operation for circulating the bath water in the bathtub 4 to the bath heat exchanger 27 and heating the bath water in the bathtub 4 to the reheating target temperature. A revocation switch 45 to be executed is provided.

  A microcomputer 46 is connected to the remote controller 5, the heat-pump control unit 26, and the flow path switching control unit 37 by wireless or wired communication with each other, and receives an input from each sensor in the hot water storage tank unit 1 to control a drive of each actuator. And a hot water bath control unit that controls hot water and bath.

Next, the characteristic operation of the bath apparatus according to the embodiment shown in FIG. 1 will be described based on the operation explanatory view of the three-way valve 36 shown in FIG. 2 and the flowchart shown in FIG.
When the reheating switch 45 of the remote controller 5 connected to the hot water bath control unit 46 is operated and the reheating operation is instructed, the hot water bath control unit 46 sets the bath setting set by the bath temperature setting switch 43 of the remote controller 5. A desired reheating target temperature is set based on the temperature, the temperature of the bathtub water in the bathtub 4, and the like (step S1), and the bath circulation pump 31 is driven (step S2). The flow path switching control unit 37 waits in the first state in which the three-way valve 36 bypasses the bathtub 4 before the reheating operation is started, that is, when the reheating operation is stopped.

  Here, when the bath set temperature set by the bath temperature setting switch 43 of the remote controller 5 is 40 ° C., for example, the hot water supply bath control unit 46 is about 1 to 2 ° C. higher than the bath set temperature or the bath set temperature. The temperature, for example, 42 ° C. is set as the reheating target temperature, and the hot water bath control unit 46 further sets a first temperature that is higher than the reheating target temperature as a temperature used for controlling the reheating operation, For example, 60 ° C. and a preset second temperature that is higher than the reheating target temperature and lower than the first temperature, for example, 50 ° C. are stored.

  The hot water bath control unit 46 drives the bath circulation pump 31 in step S2 to circulate the bath water in the bath circulation circuit 30, and the flow path switching control unit 37 detects the bath temperature detected by the bath temperature sensor 32. When it is determined whether the temperature of the water is lower than the reheating target temperature, here 42 ° C. (step S3), and it is determined that the temperature of the bathtub water detected by the bath temperature sensor 32 is lower than the reheating target temperature The three-way valve 36 is connected to the bath heat exchanger 27 side and the bathtub bypass pipe 35 side of the bath outlet pipe 28 as shown in FIG. The bath water is circulated through the flow path of the pipe 29 → the bath heat exchanger 27 → the bath outlet pipe 28 → the bathtub bypass pipe 35 to set the first state in which the bathtub 4 is bypassed (step S4). And performs bathtub water temperature reheating target temperature or determines whether the reheating operation end determination processing of detecting in a bathroom return temperature sensor 33 (step S5). Here, since the reheating operation has just started and the temperature of the bath water has not reached the reheating target temperature, the temperature of the bath water detected by the bath return temperature sensor 33 in step S5 is higher than the reheating target temperature. It is determined that the value is low, and the process returns to step S3.

  On the other hand, when the flow path switching control unit 37 determines in step S3 that the temperature of the bathtub water detected by the bath temperature sensor 32 is equal to or higher than the reheating target temperature, the bathtub detected by the bath temperature sensor 32. When it is determined whether the temperature of the water is lower than the second temperature, here 50 ° C. (step S6), and the temperature of the bath water detected by the bathing temperature sensor 32 is lower than the second temperature, As shown in FIG. 2 (a), the three-way valve 36 is connected to the bath heat exchanger 27 side of the bath outlet pipe 28 and the bathtub 4 side, and the bathtub bypass pipe 35 side is closed, so that the bathtub 4 → the bath return pipe 29 → Bath water is circulated through the flow path of the bath heat exchanger 27 → the bath outlet pipe 28 → the bathtub 4, and the second state in which the entire amount of the bath water heated by the bath heat exchanger 27 flows into the bathtub 4 side as it is. (Step S7) In which the process proceeds to-up S5.

  When the flow path switching control unit 37 determines in step S6 that the temperature of the bathtub water detected by the bath temperature sensor 32 is equal to or higher than the second temperature, the bath water detected by the bath temperature sensor 32. If the temperature of the bath water detected by the bath temperature sensor 32 is lower than the first temperature, it is determined whether the temperature of the bath water is lower than the first temperature, here 60 ° C. (step S8). As shown in FIG. 2 (c), all the connection ports 36a, 36b, 36c are opened so that all of the bath heat exchanger 27 side, the bathtub 4 side, and the bathtub bypass pipe 35 side of the bath outlet pipe 28 are communicated. In the third state, the bathtub water flowing in from the bath heat exchanger 27 side is caused to flow out to both the bathtub 4 side and the bathtub bypass pipe 35 side, and the bathtub water flowing out to the bathtub 4 side is reduced from the second state. (Step S9), In which the process proceeds to step S5.

  In step S8, when the flow path switching control unit 37 determines that the temperature of the bathtub water detected by the bath temperature sensor 32 is equal to or higher than the first temperature, the three-way valve 36 is set to the first state. (Step S10), the process proceeds to Step S3. Here, when it is determined in step S8 that the temperature of the bath water detected by the bath temperature sensor 32 is equal to or higher than the first temperature, the reheating operation end determination in step S5 is performed after the process in step S10. The reason for not proceeding to the processing is that the hot bath water stagnated in the bath heat exchanger 27 before the start of the reheating operation is circulated together with the start of the reheating operation, and the bath return temperature sensor 33 soon after the start of the reheating operation Is detected by the bath temperature sensor 32 to prevent the end of the reheating operation even though the entire amount of the bath water has not been reheated to the target temperature. When it is determined that the temperature of the bath water is equal to or higher than the first temperature, the temperature of the bath water detected by the bath temperature sensor 32 is shifted from the step S10 to the processing of the step S3. The hot water bath control unit 46 performs the reheating operation in step S5 for a predetermined time, for example, a time until hot bath water passes through the bath return temperature sensor 33 after the last determination that the water temperature is equal to or higher than the first temperature. Without performing the end determination process, the flow path switching control unit 37 may control the three-way valve 36 according to the temperature of the bath water detected by the bath temperature sensor 32 during the predetermined time. .

  As described above, the reheating operation is performed, and the temperature of the bathtub water detected by the hot water bath control unit 46 by the bath return temperature sensor 33 in the reheating operation end determination process in step S5 is equal to or higher than the reheating target temperature. If it judges that it is, the chasing operation is complete | finished and the flow-path switching control part 37 makes the three-way valve 36 stand by in the said 1st state which bypasses a bathtub.

  Next, the temperature condition of the bath water detected by the bath temperature sensor 32 for a predetermined period after the start of the chasing operation will be briefly described. Here, as an initial condition, before starting the reheating operation, the bath heat exchanger 27 has a hot bath water of about 70 ° C., the bath outlet tube 28 and the bath return tube 29 have a low temperature bath of about 20 ° C. It is assumed that water remains.

  When the reheating operation is started, the bath temperature sensor 32 detects the temperature of the bath water of about 20 ° C. remaining in the bath tube 28 for a while, and during that time, the flow path switching control is performed in the step S4. The part 37 keeps the three-way valve 36 in the first state. Thereafter, the bath temperature sensor 32 detects the temperature of the hot bath water of about 70 ° C. in the circulating bath heat exchanger 27 for a while, and during that time, the flow path switching control unit 37 detects the three-way valve 36 in step S10. In the first state, the bathtub 4 is bypassed.

  Then, after hot bath water of about 70 ° C. in the bath heat exchanger 27 has passed, the bath temperature sensor 32 initially stays in the bath return pipe 29 and is circulated to the bath heat exchanger 27 and heated. The temperature of the bath water that is equal to or higher than the target temperature and lower than the first temperature is detected, and the flow path switching control unit 37 keeps the three-way valve 36 in the second state or the third state in step S9 in step S7. At this time, the bathtub water in the bathtub 4 starts to circulate to the bath heat exchanger 27. From here, the flow path switching control unit 37 is selected according to the temperature of the bathtub water detected by the bath-out temperature sensor 32. Controls the three-way valve 36. In addition, the hot bath water of about 70 ° C. bypassing the bathtub 4 is circulated through the bath circulation circuit 30 and bypasses the bathtub 4 every time it is detected by the bath temperature sensor 32.

  In the reheating operation described above, when the flow path switching control unit 37 determines in step S3 that the temperature of the bathtub water detected by the bath temperature sensor 32 is lower than the reheating target temperature, three steps are performed in step S4. By setting the valve 36 to the first state, the low-temperature bath water staying in the bath circulation circuit 30 before starting the reheating operation is not allowed to flow into the bathtub 3 during the reheating operation. The bather can be provided with a comfortable retreat without feeling uncomfortable due to the low-temperature bath water flowing into the bathtub 3.

  Further, in step S6, the flow path switching control unit 37 determines that the temperature of the bathtub water detected by the bath temperature sensor 32 is higher than the reheating target temperature and lower than the second temperature, which is slightly higher than the reheating target temperature. When the temperature is within a temperature range that does not cause discomfort to the bather, the three-way valve 36 is set to the second state in the step S7, so that the reheating can be performed smoothly during the reheating operation. In step S8, the flow path switching control unit 37 may give an uncomfortable feeling to the bather who has determined that the temperature of the bath water detected by the bath temperature sensor 32 is equal to or higher than the second temperature and lower than the first temperature. When the temperature range is not within the range, the three-way valve 36 is set to the third state in step S9, so that the amount of bath water flowing into the bathtub 4 is reduced during the reheating operation, so that the bather can experience it. Heat can be alleviated that, without discomfort to bathers, those capable of providing a comfortable reheating.

  Moreover, the flow path switching control unit 37 determines that the temperature of the bathtub water detected by the bath temperature sensor 32 is higher than the first temperature in step S8, which is significantly higher than the reheating target temperature, and is uncomfortable for the bather. In the case of the temperature that gives the temperature, the three-way valve 36 is set to the first state in step S10, so that the hot bath water staying in the bath heat exchanger 27 before the start of the reheating operation is reheated. Even if it is circulated at the time of driving, since hot bath water does not flow into the bathtub 4, it is possible to provide a comfortable chasing without giving the bather an uncomfortable feeling of being too hot.

  Further, before the reheating operation or after the renewal operation, that is, when the reheating operation is stopped, the three-way valve 36 is kept in the first state so that the flow path switching control unit 37 and the hot water supply are stopped when the reheating operation is stopped. The bath controller 46 detects that the temperature of the bathtub water in the bath return pipe 28 or the bath return pipe 29 detected by the bath return temperature sensor 32 or the bath return temperature sensor 33 has dropped to the freezing prevention temperature, and the bath circulation. Even when the pump 31 is driven to perform the freeze prevention operation of the bath circulation circuit 30, the low-temperature bath water staying in the bath circulation circuit 30 does not flow into the bathtub 4. Even if the bather is taking a bath at this time, the bath water of low temperature does not flow into the bathtub 4 and the bather feels uncomfortable due to the intrusion of the cold bath water. To give It is the casting.

  In the above embodiment, the control of the present invention is applied during the reheating operation for heating the bath water. However, the present invention is not limited to the above embodiment, and the bath automatic switch of the remote controller 5 is used. The control according to the present invention may be applied even during the heat-retaining operation for keeping the bathtub water warm when the operation of 44 is performed.

  In the above embodiment, if it is determined in step S8 that the temperature of the bath water detected by the bath temperature sensor 32 is lower than the first temperature, the three-way valve 36 is connected to the bath tube in step S9. All the 28 bath heat exchanger 27 side, the bathtub 4 side, and the bathtub bypass pipe 35 side are connected, and the bathtub water flowing in from the bath heat exchanger 27 side is discharged to both the bathtub 4 side and the bathtub bypass pipe 35 side. In the third state, the amount of bath water flowing out to the bathtub 4 side is reduced from the second state, but the third state is adjusted by adjusting the inner valve body of the three-way valve 36, and the bath heat exchanger. The bathtub water flowing in from the 27th side may be in a state of flowing out by 50% to both the bathtub 4 side and the bathtub bypass pipe 35 side, and the temperature of the bathtub water detected by the bathing temperature sensor 32 is close to the second temperature. The inflow from the bath heat exchanger 27 side More bath water flows out to the bathtub 4 side than the bathtub bypass pipe 35 side, and the bath water temperature detected by the bath temperature sensor 32 is closer to the first temperature from the bath heat exchanger 27 side. It is good also as a state which flows out more bathtub water inflow to the bathtub bypass pipe 35 side rather than the bathtub 4 side, and the temperature of the bathtub water detected with the bathing temperature sensor 32 is more than said 2nd temperature, and said 1st When the temperature is lower than one temperature, various modifications can be made without changing the gist that the three-way valve 36 is in a state of reducing the amount of bath water flowing out from the second state to the bathtub 3 side.

  In the above-described embodiment, the flow path switching control unit 37 controls the driving of the three-way valve 36 in response to the input of the bathing temperature sensor 32 independently of the hot water bath control unit 46. The hot water bath control unit 46 may have the function of the flow path switching control unit 37. In that case, the hot water bath control unit 46 is connected to the hot water temperature sensor 32 and the three-way valve 36 by wiring.

  In the above-described embodiment, the three-way valve 36 is provided at a connection portion between the bathtub bypass pipe 35 and the bath outlet pipe 28, but may be provided at a connection portion between the bathtub bypass pipe 35 and the bath return pipe 29. Is.

  In the above embodiment, the bath circulation circuit 30 including the bath outlet pipe 28 and the bath return pipe 29 is provided with the bathtub bypass pipe 35 and the three-way valve 36, but the bus adapter ( A bathtub bypass pipe 35 and a three-way valve 36 may be provided in the interior (not shown).

  In the above-described embodiment, the three-way valve 36 is used as the flow path switching unit. However, instead of the three-way valve 36, the bathtub opening pipe 28 and the bathtub bypass pipe are provided with the first opening / closing valve in the bathtub bypass pipe 35. A second opening / closing valve is provided in the bath outlet pipe 28 or the bath return pipe 29 on the side of the bathtub 4 with respect to the connecting portion with the pipe 35 or the connecting portion between the bath return pipe 29 and the bathtub bypass pipe 35, and the two opening / closing valves are flow paths. As a switching means, the first on-off valve is opened, the second on-off valve is closed to the first state, the first on-off valve is closed, the second on-off valve is opened to the second state, and the first The control of the present invention may be performed by opening the on-off valve and opening the second on-off valve to the third state.

  Further, the present invention is not limited to the above-described embodiment. In this embodiment, a bath heat exchanger 27 is disposed in the hot water storage tank 2 in which hot hot water heated by the heat pump unit 3 is stored. The control of the present invention is applied to a configuration in which the hot water in the hot water storage tank 2 is used as a heating means and the bath water in the bath heat exchanger 27 is heated by heat exchange. In the electric water heater that heats hot water in the hot water storage tank 2 to a high temperature, a bath heat exchanger 27 is provided in the hot water storage tank 2, and the hot water in the hot water storage tank 2 is used as a heating means. The control of the present invention may be applied to a configuration in which the bath water in the bath heat exchanger 27 is heated by heat exchange, and further, a heat exchanger for hot water supply and a bath heat exchanger using gas or petroleum as fuel. 27 is connected to the same fin In a gas water heater or oil water heater called a single can / two water channel type heated by one burner, the bath water in the bath heat exchanger 27 is heated by heat exchange by using the combustion heat of the burner as a heating means. The control of the present invention may be applied to the present invention, and various modifications are possible without departing from the scope of the present invention, and this is not disturbed.

  Next, another embodiment shown in FIG. 4 will be described. In this embodiment, description of the same configuration as that of the embodiment described above is omitted, and only the differences will be described. A bath heat exchange bypass pipe 47 that bypasses the bath heat exchanger 27 by connecting a bath return pipe 28 and a bath return pipe 29 closer to the bath heat exchanger 27 than the bath circulation pump 31 in the vicinity, and this bath heat exchange bypass pipe A second three-way valve 48 is provided as a second flow path switching means at a portion connected to the 47 bath return pipe 29.

  The second three-way valve 48 connects the bath 4 side of the bath return pipe 29 to the inflow side connection port 48a, and one of the two outflow side connection ports 48b and 48c has bath heat exchange. The bath heat exchange bypass pipe 47 side is connected to the other connection port 48c, and the inner valve body is moved by driving the stepping motor to connect the bath return pipe 29 to the bathtub. 4 side and the bath heat exchanger bypass pipe 47 side are communicated and the bath heat exchanger 27 side is closed, and the bath water from the bathtub 4 is allowed to flow to the bath heat exchanger bypass pipe 47 side to bypass the bath heat exchanger 27. The bath 4 side and the bath heat exchanger 27 side of the bath return pipe 29 and the bath heat exchanger bypass pipe 47 side are closed and the bath water from the bathtub 4 is allowed to flow into the bath heat exchanger 27 as it is. It is possible to switch to the fifth state and The bath control unit 46 sets the second three-way valve 48 to the fifth state during the chasing operation, and causes the second three-way valve 48 to wait in the fourth state when the chasing operation is stopped. Is.

  As described above, when the reheating operation is stopped, the flow path switching control unit 37 causes the three-way valve 36 to stand by in the first state, and the hot water bath control unit 46 sets the second three-way valve 48 in the fourth state. When the reheating operation is stopped, the flow path switching control unit 37 and the hot water bath control unit 46 detect the inside of the bath return pipe 28 or the bath return pipe 29 detected by the bath return temperature sensor 32 and the bath return temperature sensor 33. Even when it is detected that the temperature of the bath water in the bath has decreased to the antifreezing temperature and the bath circulation pump 31 is driven to perform the antifreezing operation of the bath circulation circuit 30, the bath circulation circuit 30 remains in the bath circulation circuit 30. Since the low temperature bath water does not flow into the bathtub 4, the temperature of the hot water in the bathtub 4 is not lowered. Even if the bather is taking a bath at this time, the low temperature bath is contained in the bathtub 4. Do not let water flow in Since the bath water does not give the bather an unpleasant feeling due to the intrusion of the low temperature bath water, and the low temperature bath water staying in the bath circulation circuit 30 is not circulated to the bath heat exchanger 27, the hot water storage tank The temperature of the hot water in 2 is not lowered, and the amount of heat used for hot water supply or the like is not wasted.

  In the other embodiment described above, the second three-way valve 48 is set to the fifth state during the reheating operation for heating the bath water. If it is determined that the temperature of the bathtub water to be detected is equal to or higher than the first temperature, the second three-way valve 48 may be set to the fourth state. Then, the bathtub bypass pipe 35 → the bath return pipe 29 → the bath heat exchanger The bathtub water is circulated in a closed flow path of the bypass pipe 47 → the bath outlet pipe 28 → the bathtub bypass pipe 35, and the hot bathtub water that has stagnated in the bath heat exchanger 27 before the reheating operation starts. When detected by the bath temperature sensor 32 during the reheating operation, the bath water is circulated through the closed flow path, and the hot bath water is radiated and the temperature is lowered along with the circulation. When the temperature of the bathtub water detected by the bath temperature sensor 32 becomes lower than the first temperature, the three-way valve 36 is appropriately adjusted to the second state and the third state to flow into the bathtub 4 side. By doing so, there is no discomfort due to the inflow of hot bath water, and a comfortable chasing can be provided.

4 Bath 27 Bath heat exchanger 28 Bath return pipe 29 Bath return pipe 30 Bath circulation circuit 31 Bath circulation pump 32 Temperature detection means 35 Bathtub bypass pipe 36 Flow path switching means

Claims (8)

  Bathtub, bath heat exchanger that heats bath water, bath circulation circuit formed by connecting the bathtub and bath heat exchanger with a bath return pipe and a bath return pipe, and a bath circulation provided in the bath circulation circuit A pump, temperature detection means for detecting the temperature of bath water from the bath heat exchanger toward the bathtub, a bathtub bypass pipe that bypasses the bathtub through the bath return pipe and the bath return pipe, and at least the A first state in which the bathtub water heated by the bath heat exchanger is caused to flow through the bathtub bypass pipe to bypass the bathtub, and a second state in which the bathtub water heated by the bath heat exchanger flows into the bathtub as it is. And a flow path switching means that can be switched to a state in which the bath water is circulated through the bath heat exchanger and reheated to a refill target temperature.焚Sometimes, when the temperature detected by the temperature detecting means is higher than a preset first temperature higher than the reheating target temperature, the flow path switching means is set to the first state. Bath equipment.   A second temperature higher than the reheating target temperature and lower than the first temperature is provided, and at the time of reheating, if the temperature detected by the temperature detecting means is equal to or higher than the reheating target temperature and lower than the second temperature, When the flow path switching means is in the second state and the temperature detected by the temperature detection means is equal to or higher than the second temperature and lower than the first temperature, the flow path switching means is moved to the bathtub from the second state. The bath apparatus according to claim 1, wherein the bath water to be introduced is in a third state in which the bath water is reduced.   3. The flow path switching means is set to the first state when the temperature detected by the temperature detection means is lower than the target temperature at the time of reheating. Bath equipment.   The bath apparatus according to any one of claims 1 to 3, wherein when the chase is stopped, the flow path switching unit is made to stand by in the first state.   A bath outlet pipe for allowing the bathtub water to flow into the bathtub, a bath return pipe for allowing the bathtub water to flow out of the bathtub, a temperature detecting means for detecting the temperature of the bathtub water in the bathtub outlet pipe, and the bath outlet pipe A bath bypass pipe that communicates with the bath return pipe and bypasses the bathtub; at least a first state in which the bathtub water from the bath return pipe flows into the bathtub bypass pipe and bypasses the bathtub; A channel switching means switchable to a second state in which the bathtub water from the pipe flows into the bathtub as it is, and at the time of reheating when the bath water is circulated and heated to the reheating target temperature The flow path switching means is set to the first state when the temperature detected by the temperature detecting means is higher than a preset first temperature higher than the reheating target temperature. Tub circulation tool.   A second temperature higher than the reheating target temperature and lower than the first temperature is provided, and at the time of reheating, if the temperature detected by the temperature detecting means is equal to or higher than the reheating target temperature and lower than the second temperature, When the flow path switching means is in the second state and the temperature detected by the temperature detection means is equal to or higher than the second temperature and lower than the first temperature, the flow path switching means is moved to the bathtub from the second state. The circulator for bathtubs according to claim 5, wherein the bathtub water to be introduced is in a third state in which the bathtub water is reduced.   7. The flow path switching means is set to the first state when the temperature detected by the temperature detecting means is lower than the target temperature at the time of reheating. Tub circulator.   The circulator for bathtubs according to any one of claims 5 to 7, wherein the flow path switching means is made to stand by in the first state when the chase is stopped.

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