JP2011089692A - Water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water heater reducing a load on the heart during a shower bath, and improving comfortableness. <P>SOLUTION: The water heater includes a heat source 13 heating hot and cold water, an output operation part 9 adjusting output of the heat source 13, a discharge part (a shower head) 5 discharging the hot and cold water heated by the heat source 13, and a warm and cold switch 10 starting operation of alternately tapping hot water and cold water with different temperatures. When the warm and cold switch 10 is operated to start operation of a warm and cold bath, in a first predetermined time, the output of the heat source is adjusted to tap hot and cold water from the discharge part such that a temperature detected by a temperature detecting part 31 becomes a temperature set in a temperature operation part, and after passage of the first predetermined time, hot water and cold water with different temperatures are alternately tapped. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a water heater, and more particularly, to output control of a heat source.

  Some conventional hot water heaters discharge hot water heated by a heat source from a discharge section such as a shower head so that a user can enjoy a shower bath (see, for example, Patent Document 1).

JP 2008-309407 A

  However, with a conventional water heater, hot water of a certain temperature is only discharged from the shower head, so the body is heated by the heat of the hot water and sweats after the shower bath, so there may be a lack of refreshment. There was a problem that a feeling of fatigue remained and comfort was impaired.

  The present invention solves the above-mentioned conventional problems, and an object thereof is to provide a water heater that reduces the burden on the heart and improves comfort.

  In order to solve the above-described conventional problems, a water heater of the present invention includes a heat source for heating hot water, temperature detecting means for detecting the temperature of hot water heated by the heat source, and a temperature operation unit for adjusting the temperature discharged from the heat source. And a discharge part that discharges hot water heated by a heat source, and a hot / cold switch that starts an operation of alternately discharging hot water with different temperatures, and operates the hot / cold switch to start the hot / cold bath operation. When the first predetermined time is reached, the temperature detected by the temperature detecting means is adjusted to the temperature set by the temperature operation unit so that the output of the heat source is adjusted and hot water is discharged from the discharge unit. After a lapse of time, hot water with different temperatures is alternately discharged.

  As a result, it is possible to perform a shower bath in which hot and cold water of different temperatures are alternately discharged, so that the heart rate during the shower bath can be reduced, the burden on the heart can be reduced, and comfort can be improved. it can. Furthermore, the hot water heated by the heat source is discharged for the first predetermined time before the hot water of different temperatures are alternately discharged, so that sudden fluctuation of the heart rate is prevented without suddenly bathing the user in cold water. Can do.

  The present invention can provide a water heater that reduces the burden on the heart and has improved comfort.

Front external view of a water heater in Embodiment 1 of the present invention Main part external view in the first embodiment Configuration diagram of a water heater in Embodiment 1 Variation diagram of temperature detected by temperature sensor 31 during continuous bathing in the first embodiment Main part external view in the first embodiment Change diagram of temperature detected by temperature sensor 31 during hot / cold bath in Embodiment 1 The figure which showed the state of the heart rate in Embodiment 1 The figure which showed the state of the heart rate in Embodiment 1 (A) Heart rate change diagram in the first embodiment (b) Heart rate change diagram in the first embodiment The figure which showed the content rate of the alpha wave in the same Embodiment 1 The figure which showed the change of the alpha wave in the same Embodiment 1 Change diagram of temperature detected by temperature sensor 31 during hot / cold bath in Embodiment 1 Change figure of heart rate of only hot and cold bath in the first embodiment Change figure of heart rate when hot and cold bath is performed after continuous bath in the first embodiment Configuration diagram of a water heater in the second embodiment Configuration diagram of water heater in Embodiment 3 Main part external view of the water heater in Embodiment 4 Variation diagram of temperature detected by temperature sensor 31 during hot / cold bath in Embodiment 5

  The water heater of the first invention comprises a heat source for heating hot water, temperature detecting means for detecting the temperature of hot water heated by the heat source, a temperature operation unit for adjusting the temperature of hot water discharged from the heat source, and hot water heated by the heat source. A discharge unit for discharging, and a hot / cold switch for starting an operation of alternately discharging hot and cold water at different temperatures, and when the hot / cold bath operation is started by operating the hot / cold switch, a first predetermined time Adjusts the output of the heat source so that the temperature detected by the temperature detection means becomes the temperature set by the temperature operation unit and discharges hot water from the discharge unit, and after the first predetermined time has elapsed, The hot water is alternately discharged.

  As a result, it is possible to perform a shower bath in which hot and cold water of different temperatures are alternately discharged, so that the heart rate during the shower bath can be reduced, the burden on the heart can be reduced, and comfort can be improved. it can. Furthermore, the hot water heated by the heat source is discharged for the first predetermined time before the hot water of different temperatures are alternately discharged, so that sudden fluctuation of the heart rate is prevented without suddenly bathing the user in cold water. Can do.

  The water heater of the second invention is provided with an incoming water temperature detecting means for detecting the temperature of the hot water before being heated by the heat source, particularly in the first invention, according to the incoming water temperature detected by the incoming water temperature detecting means, By changing the length of the first predetermined time, it is possible to warm the body sufficiently by changing the first predetermined time while watching the state of the incoming water temperature that changes according to the season. After that, since the hot / cold bath operation starts, rapid heart rate fluctuations can be prevented.

  A water heater according to a third aspect of the present invention includes an outside air temperature detecting means for detecting the temperature of the outside air, particularly in the first invention, and the length of the first predetermined time according to the outside air temperature detected by the outside air temperature detecting means. By changing the temperature, the body can be warmed sufficiently by changing the first predetermined time while observing the situation of the outside air temperature that changes according to the season. Since this starts, sudden heart rate fluctuations can be prevented.

  The water heater according to the fourth aspect of the invention is characterized in that, in any of the first to third aspects of the invention, the physical condition input means for selecting whether or not to provide the first predetermined time according to the physical condition is provided. When it is okay, the hot and cold bath operation is suddenly started without providing the first predetermined time, and when the physical condition is unsatisfactory, the first predetermined time is provided and the hot and cold bath operation is started to suddenly change the heart rate. Can be suppressed.

In the hot water heater of the fifth invention, in particular, in any one of the first to fourth inventions, when the hot water bath operation is performed, when the hot water is changed from the hot water to the low temperature hot water, After changing the hot water from the high temperature side to the warm water in the intermediate temperature range by letting out the hot water from the low temperature side after the second predetermined time is discharged with the hot water in the intermediate temperature range provided between the hot water and the hot water on the side, Therefore, rapid fluctuations in the user's heart rate can be suppressed without causing a rapid temperature change from the high temperature side to the low temperature side.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is an external front view of a water heater in the first embodiment, FIG. 2 is a detailed view of a main part, and FIG. 3 is a configuration diagram of the water heater in the first embodiment. First, the external configuration of the water heater in Embodiment 1 will be described with reference to FIGS. As shown in FIG. 1, a water heater in the present embodiment includes a casing 1 that forms an outer shell, a hot water outlet 2 through which hot water is discharged from a hot water supply pipe 14 in the casing 1, It has a water supply port 3 for supplying hot water to the water supply pipe 15.

  A shower hose 4 that constitutes a part of the hot water supply path is connected to the hot water outlet 2, and a shower head 5 that is a discharge portion is provided at the end of the shower hose 4. When the hot water heater is used, the shower head 5 is provided. Hot water is discharged from the user toward the user.

  In addition, a flow rate adjusting valve 6 that adjusts the amount of water supply is attached to the water supply port 3 to adjust the amount of water supplied from the water supply source to the water supply port 3 via the water inlet pipe 7. Normally, when the water heater is installed, the flow rate adjustment valve 6 is operated to set the amount of water supply. However, even when the water heater is in use, the user can operate the flow rate adjustment valve 6 to connect the water heater. The amount of water supply can be set.

  In addition, the front of the housing 1 has a hot water switch 8 for starting / stopping hot water from the shower head 5, and when the user presses the hot water switch 8 once when the water heater is stopped. When the hot water is discharged from the shower head 5 and the hot water switch 8 is pressed again, the hot water being discharged from the shower head 5 is stopped.

  Also, two temperatures, a high temperature side and a low temperature side, can be set. As illustrated in FIG. 2, the temperature setting screen is displayed on the display unit 51 by operating the operation unit 52. Then, the operation unit 52 is operated to set the temperature Tx of the high temperature side hot water and the temperature Ty of the low temperature side hot water. In FIG. 2, the temperature of hot water on the high temperature side is set to 42 ° C., and the temperature of hot water on the low temperature side is set to 35 ° C.

  Further, as shown in FIG. 1 and FIG. 2, it has a hot / cold switch 10 having an ON button 10a and an OFF button 10b, and further has a hot / cold lamp 11 that is turned on when the ON button 10a is pressed. Yes. That is, when the hot / cold switch 10 is on, the hot / cold lamp 11 is turned on, so that the user knows that the hot / cold switch 10 is on.

  Further, as shown in FIG. 3, a tank 12 for storing a small amount of hot and cold water and a heater 13 that is a heat source for heating the hot water are disposed inside the housing 1, and the heater 13 is disposed inside the tank 12. is doing. Further, a hot water supply pipe 14 for guiding hot water heated in the tank 13 to the hot water supply port 2 and a water supply pipe 15 for guiding low temperature water from the water supply port 3 to the tank 13 are provided. The water supply pipe 15 is connected to the bottom of the tank, and the end of the hot water supply pipe 14 is embedded in the tank 12 so that hot water in the upper part of the tank 12 is supplied.

The water supply pipe 15 is provided with a flow rate sensor 16 that is a flow rate detection means for detecting the amount of water supplied, and a water stop cock 17 that opens and closes the water flow path of the water supply pipe 15. When is opened, water is supplied to the tank 12, and when the stop cock 17 is closed, water supply to the tank 12 is stopped. Further, a flow rate adjusting valve 23 for adjusting the flow rate of hot water supplied to the water supply port 3 by operating the flow rate adjusting valve 6 is provided outside the housing 1.

  In addition, a temperature sensor 31 is provided as temperature detecting means for detecting the temperature of hot water heated by the heater 13. During normal shower bath, the user sets the temperature Tx (high temperature side) by operating the operation unit 52, and the output of the heater 13 is adjusted so that the temperature detected by the temperature sensor 31 becomes the set temperature Tx. Is done. The temperature sensor 31 is disposed in the tank 12 and detects the temperature of hot water supplied to the hot water supply pipe 14.

  Further, a power supply control device 18 composed of electronic components or the like is provided to control the heater 13, and the power supply control device 18 controls the power of the heater 13 via the heater energization control element 19. Further, the heater 13 is controlled by receiving support from the heat source control device 20 and the heating / cooling switch 10 that are constituted by electronic components and the like that control the output of the heater 13 so that the output determined by the heat source adjustment volume 9 is obtained. A hot / cold water control device 21 composed of electronic components and the like is provided.

  In addition, a power switch 22 for supplying power from an external power source to each component is provided, and the power switch 22 is turned on and off by operating the hot water switch 8. In the present embodiment, the power supply control device 18, the heat source control device 20, the hot / cold water control device 21 and three control devices will be described. However, there is a problem even if these control devices are configured integrally. There is no. Moreover, each control apparatus may be comprised with the electronic component which comprises a microcomputer and its periphery.

  Hereinafter, the operation and action of the water heater configured as described above will be described.

  When using the water heater of the present embodiment, first, the hot water switch 8 is pressed once. When the hot water switch 8 is pressed, the stop cock 17 is opened and the power switch 22 is turned on to start supplying power to each component. As a result of opening the stop cock 17, water supply to the water supply port 3 is started. When the flow rate sensor 16 detects the supply water flow rate and the flow rate sensor 16 detects a predetermined flow rate (for example, 1 L / min), the heater is energized. The power supply control device 18 controls the power of the heater 13 via a control element (for example, triac) 19.

  First, the shower bath at the time of the continuous bath when the warm / cold lamp 11 is turned off will be described. FIG. 4 is a diagram illustrating a change in temperature detected by the temperature sensor 31 when the hot water is discharged from the shower head 5. As shown in FIG. 4, in a normal shower bath when the warm / cold lamp 11 is turned off, the output of the heater 13 is set so that the temperature detected by the temperature sensor 31 becomes the temperature Tx set by the operation unit 52. Is controlled.

  First, the user presses the hot water switch 8 to start discharging hot water from the shower head 5. At this time, the power switch 22 is also turned on, and power is supplied to each control device and the like. When a predetermined flow rate is detected by the flow rate sensor 16, energization of the heater 13 is started to start warming hot water in the tank 12. In this embodiment, when the flow rate sensor detects a flow rate of 1 L / min, energization of the heater 13 is started, but the predetermined flow rate is not limited to this.

  Then, the user operates the operation unit 52 to set the temperature Tx of the hot water on the high temperature side. As a result, as shown in FIG. 4, even if the hot water switch 8 is pressed to start the hot water from the shower head 5, the temperature detected by the temperature sensor 31 when the warm / cool switch 10 is OFF is The output of the heater 13 is adjusted so that the hot water temperature Tx on the high temperature side set at 52 is reached.

When the user again presses the hot water switch 8 to stop the hot water from the shower head 5, the output from the heater 13 is also stopped, and the user ends the shower bath.

  Next, the shower bath at the time of the hot / cold bath when the hot / cold lamp 11 is turned on will be described.

  FIG. 5 is an external view of a main part of the water heater according to the present embodiment. As shown in FIG. 5, the time setting screen is displayed on the display unit 51 by operating the operation unit 52. Then, the operation unit 52 is operated to set the hot water hot water discharge time La and the low temperature hot water hot water discharge time Lb. In FIG. 5, the hot water discharge time is set to 30 seconds, and the low temperature hot water discharge time is set to 30 seconds. Since both can be set in this way, the hot water discharge time can be set according to the user's preference, and the use can be adapted to various demands. In the present embodiment, the hot water hot water discharge time La and the low temperature hot water discharge time Lb are configured to be settable. However, the present invention is not limited to this, and every predetermined time provided in advance. Alternatively, a configuration in which high and low temperatures are repeated may be used.

  First, the hot water switch 8 is pressed to start the hot water from the shower head 5. And by operating the operation part 52, the temperature Tx of the high temperature side hot water and the temperature Ty of the low temperature side hot water are set, and the hot water hot water discharge time La and the low temperature hot water discharge time Lb are set. Set. Before pressing the ON button 10a of the hot / cold switch 10, hot water at the set temperature Tx is discharged from the shower head 5. In the present embodiment, the temperature Tx of hot water on the high temperature side is set to 42 ° C., the temperature of hot water on the low temperature side is set to 35 ° C., and the hot water discharge times La and Lb are each 30 seconds.

  Next, the ON button 10a of the heat / cool switch 10 is pressed. When the ON button 10a is pressed, the mode is changed to the hot / cold bath mode, and the hot / cold lamp 11 is turned on. Then, the hot / cold water control device 21 starts counting a predetermined time after the ON button 10a is pressed, and is detected by the temperature sensor 31 during a predetermined time La which is the first predetermined time after the ON button 10a is pressed. The output of the heater 13 is adjusted so that the temperature to be set becomes the set temperature Tx.

  FIG. 6 is a diagram showing changes in the temperature detected by the temperature sensor 31 during the hot / cold bath operation. When the predetermined time La elapses, the output of the heater 13 is adjusted so that the temperature detected by the temperature sensor 31 becomes the set temperature Ty. After the output of the heater 13 is changed, the temperature / cooling control device 21 starts counting a predetermined time, and the output of the heater 13 is adjusted so as to reach the set temperature Ty until the predetermined time Lb elapses. When the predetermined time Lb elapses, the output of the heater 13 is adjusted again so that the temperature detected by the temperature sensor 31 becomes the set temperature Tx, the predetermined time La starts to be counted, and thereafter, the above operation is repeated.

  FIG. 7 is a diagram showing heart rate states of the continuous bath when the warm / cool switch 10 is OFF and the warm / cool bath when the warm / cool switch 10 is ON. In the experiment shown in FIG. 7, a shower bath was performed for 10 minutes, and the heart rate during the shower bath was measured. In addition, the line graph P shown in FIG. 7 shows the change of the heart rate at the time of a continuous bath (heat / cool switch 10 is OFF), and the line graph Q is the change of the heart rate at the time of the heat / cool bath (heat / cool switch 10 is turned on). Is shown.

  During the continuous bath, the shower temperature is 38 ° C. and the shower bath is performed for 10 minutes. During the hot and cold bath, the temperature on the high temperature side of the shower is 38 ° C. and the temperature on the low temperature side is 25 ° C. Hot water and 25 ° C. hot water were alternately discharged from the shower head 5 and subjected to a shower bath for 10 minutes. As a result, the average heart rate during the continuous bath was 92 bpm, whereas the average heart rate during the hot and cold bath was 80 bpm.

FIG. 8 is a diagram showing heart rate states of the continuous bath when the warm / cool switch 10 is turned off and the warm / cool bath when the warm / cool switch 10 is turned on. In addition, FIG.
(a) and (b) are diagrams showing the average heart rate during the continuous bath and the hot / cold bath mode. In the experiment shown in FIG. 8 and FIG. 9, the change of the heart rate by a healthy man when the hot / cold switch 10 is OFF and when it is ON was measured. Specifically, the heart rate was measured for a series of actions of first exercising for 5 minutes and then taking a 10-minute shower with a 1-minute break. In addition, the line graph X shown in FIG. 6 has shown the change of the heart rate at the time of a continuous bath, and the line graph Y has shown the change of the heart rate at the time of a hot and cold bath.

  As shown in FIGS. 8, 9 (a) and 9 (b), the average heart rate during exercise for both the continuous bath and the hot / cold bath was 140 bpm. And after exercise, after a 1-minute break, a 10-minute shower bath was performed. As a result, the average heart rate was 115 bpm during continuous bathing when the hot / cold switch 10 is OFF (shower temperature is 38 ° C.), whereas the hot / cold bath mode when the hot / cold switch 10 is ON. At that time, the average heart rate becomes 98, and it can be seen that the heart rate is lower than that during continuous bathing. In the hot / cold bath mode, the heart rate is measured with the temperature on the high temperature side being 38 ° C., the temperature on the low temperature side being 25 ° C., and the predetermined time α being 30 seconds.

  Thus, in this embodiment, by turning on / off the energization of the heater 13 every predetermined time, the user can bathe the high-temperature water and the low-temperature water alternately alternately, good for health. In addition, as shown in FIG. 7 to FIG. 9, since the average heart rate can be lowered by performing a warm / cool bath, the burden on the heart of the user can be reduced, and a comfortable shower bath can be performed, A low heart rate is also effective in recovering from fatigue.

  Moreover, in this Embodiment, since the output of the heater 13 is switched for every predetermined time La and every predetermined time Lb, the user can take a hot water and low temperature water alternately alternately, and is very healthy. Good for. In addition, since the average heart rate can be lowered by performing the hot and cold bath, the burden on the heart of the user can be reduced and a comfortable shower bath can be performed.

  Moreover, since the output of the heater 13 is changed every predetermined time, the power consumption can be reduced, and the power consumption can be reduced by the time when the energization of the heater 13 is stopped.

  Furthermore, since the hot water discharge time La and the low temperature hot water discharge time Lb can be set according to the user's preference, usability can be improved.

  FIG. 10 and FIG. 11 are diagrams showing α wave values during continuous bathing and hot / cold bathing. The α wave refers to an electroencephalogram having a frequency of 8 to 13 Hz obtained by frequency analysis of the electroencephalogram measurement result. In general, there is a tendency for a lot of alpha waves to appear when feeling comfortable.

  10 and 11, the α wave content before taking a continuous bath shower is 42.88%, whereas the α wave content after taking a continuous bath shower is 42.88%. Was 40.52%. On the other hand, the α wave content before taking a hot / cold bath shower was 46.94%, whereas the α wave content after taking a hot / cold bath shower was 56.75%. It was. In this way, when taking a hot / cold shower, it can be seen that the α wave is remarkably increased, and the user is in a relaxed state.

  By the way, in the hot and cold bath operation described above, hot and cold hot water are bathed alternately, and for the user, the hot water is heated where the body is not warm enough, and the heart rate is increased. May increase rapidly. Therefore, in the present embodiment, hot water of the set temperature Tx is discharged for a first predetermined time La ′ (for example, 3 minutes) after the start of the hot / cold bath operation. It should be noted that there is a relationship of the predetermined time La <the first predetermined time La ′.

FIG. 12 is a diagram showing a change in temperature detected by the temperature sensor 31 during the hot / cold bath operation. FIG.
As shown in FIG. 5, when the hot / cold bath operation is started by pressing the ON button 10a, the hot water is discharged so as to reach the set temperature Tx during the first predetermined time La ′. The body warms up during the first predetermined time La ′. Thereafter, when the first predetermined time La ′ elapses, the output of the heater 13 is changed so that the set temperature Ty on the low temperature side is reached, and low temperature hot water is discharged.

  Thereafter, when the predetermined time Lb set by the operation unit 52 has elapsed, the output of the heater 13 is changed again so that the temperature detected by the temperature sensor 31 becomes the set temperature Tx, and is maintained at the set temperature Tx for the predetermined time La. After that, the same operation is repeated. That is, in the present embodiment, the body is warmed in a continuous bath for the first predetermined time La ′, and then the warm / cold bath operation is started to enhance the relaxation effect.

  FIG. 13 is a graph showing changes in heart rate when a warm bath is performed without performing a continuous bath, and FIG. 14 is a heart rate change when performing a warm bath after performing a continuous bath. FIG. As shown in FIG. 13, when the hot and cold bath was suddenly performed without performing the continuous bath, the heart rate fluctuated rapidly immediately after the start of the hot and cold greed and increased to 104.0 bpm. As a result of performing a warm / cold bath for 10 minutes, the average heart rate became 77.6 bpm.

  On the other hand, as shown in FIG. 14, after performing the continuous bath for 3 minutes, the warm and cool bath was performed for 10 minutes. As a result, in the first continuous bath, the average heart rate was 78.3 bpm. The average heart rate was 76.0 bpm. Furthermore, the heart rate increased immediately after changing from the continuous bath to the warm / cold bath, but the peak value of the heart rate was 89.0 bpm.

  Thus, as can be seen from FIG. 13 and FIG. 14, after warming the body by performing a continuous bath, rapid fluctuations in heart rate can be suppressed and the burden on the heart is reduced. be able to.

  In the present embodiment, the low temperature side set temperature Ty can be set. However, the present invention is not limited to this, and the temperature of the hot water before heating with the low temperature side set temperature set at the output of the heater 13 is zero. It is good.

(Embodiment 2)
In the second embodiment, the water supply pipe 15 is provided with a temperature sensor 32 that is a water temperature detecting means for detecting the water temperature, and can detect the water temperature. The same parts as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the description thereof is omitted. FIG. 15 is a configuration diagram of a water heater in the second embodiment.

  In the first embodiment, at the start of the hot / cold bath operation, a continuous bath operation is performed for a preset first predetermined time La ′ (for example, 3 minutes), and after the first predetermined time La ′ has elapsed, Although the cold bath operation is started, in the present embodiment, the length of the first predetermined time La ′ can be changed based on the incoming water temperature. This is because, when the incoming water temperature is low, such as in winter, heart rate fluctuations can be suppressed by warming and cooling the body sufficiently.

  That is, in the present embodiment, when the incoming water temperature detected by the temperature sensor 32 exceeds a predetermined temperature Ti (for example, 30 ° C.), the first predetermined time La ′ is set as a preset time, and the temperature sensor When the incoming water temperature detected at 32 is lower than the predetermined temperature Ti, the first predetermined time La ′ is extended and the continuous bath operation time is lengthened. The extended time width of the first predetermined time La ′ when the incoming water temperature is lower than the predetermined temperature Ti may be extended by a uniform predetermined time when the incoming water temperature is lower than the predetermined temperature Ti. The function of the extended time width may be set in advance, and the first predetermined time La ′ may be extended by the extended time width corresponding to the incoming water temperature.

(Embodiment 3)
In the third embodiment, a temperature sensor 33 which is an outside air temperature detecting means for detecting the outside air temperature is provided inside the housing 1, and the outside air temperature can be detected. Further, the same portions as those in the first and second embodiments are denoted by the same reference numerals and the description thereof is omitted. FIG. 16 is a configuration diagram of a water heater in the third embodiment.

  In the first embodiment, at the start of the hot / cold bath operation, a continuous bath operation is performed for a preset first predetermined time La ′ (for example, 3 minutes), and after the first predetermined time La ′ has elapsed, Although the cold bath operation is started, in the present embodiment, the length of the first predetermined time La ′ can be changed based on the outside air temperature. This is because, when the outside air temperature is low, such as in winter, heart rate fluctuation can be suppressed by warming and cooling the body sufficiently.

  That is, in the present embodiment, when the outside air temperature detected by the temperature sensor 33 exceeds a predetermined temperature Tg (for example, 25 ° C.), the first predetermined time La ′ is set as a preset time, and the temperature sensor When the outside air temperature detected at 33 falls below the predetermined temperature Tg, the first predetermined time La ′ is extended and the continuous bath operation time is lengthened. The extended time width of the first predetermined time La ′ when the outside air temperature is lower than the predetermined temperature Tg may be extended by a uniform predetermined time when the outside air temperature is lower than the predetermined temperature Tg. The function of the extended time width may be set in advance, and the first predetermined time La ′ may be extended by the extended time width corresponding to the outside air temperature.

(Embodiment 4)
FIG. 17 is an external view of a main part of the water heater according to the fourth embodiment. As shown in FIG. 17, by operating the operation unit 52, a physical condition setting screen as physical condition setting means is displayed on the display unit 51. And on the physical condition setting screen, the user's physical condition of the day can be input. In this embodiment, it is possible to select from three types of options (“GOOD”, “MID”, “BAD”), and the physical condition becomes worse in the order of “GOOD”, “MID”, “BAD”. .

  The first predetermined time La 'can be changed according to the physical condition inputted by the user, and the continuous bath time can be changed according to the physical condition of the day. As a result, it is intended to prevent a sudden change in heart rate due to coldness and the feeling of discomfort before the body is sufficiently warmed due to poor physical condition.

  First, when the user selects “GOOD”, the first predetermined time La ′ uses a preset time as it is, and no extension time is provided. Next, when the user selects “MID”, the first predetermined time La ′ is slightly extended and the continuous bath operation is performed. Further, when the user selects “BAD”, the first predetermined time La ′ is further extended and the continuous bath operation is performed. Thus, the sudden fluctuation of the heart rate at the time of poor physical condition can be suppressed by extending the time of the continuous bath as the physical condition is worse.

(Embodiment 5)
In the fifth embodiment, when changing from the set temperature Tx on the high temperature side to the set temperature Ty on the low temperature side during the hot / cold bath operation, first, the intermediate temperature range set between the set temperature Tx and the set temperature Ty is set. The hot water at temperature Tz is discharged for a second predetermined time Lc and then changed to the set temperature Ty. This is to further reduce the burden on the heart of the user by changing the temperature of the hot water from the high temperature side to the low temperature side, without causing a sudden temperature change, and once the hot water in the middle temperature range is discharged. be able to.

FIG. 18 is a change diagram of the tapping temperature detected by the temperature sensor 31 in the fifth embodiment. As shown in FIG. 18, when the hot / cold bath operation is started, hot water having a temperature that becomes the set temperature Tx on the high temperature side is discharged for a first predetermined time La ′. Next, when the first predetermined time La ′ elapses, the output of the heater 13 is adjusted so that the temperature detected by the temperature sensor 31 becomes a set temperature Tz between the set temperature Tx and the set temperature Ty. Then, when the temperature detected by the temperature sensor 31 is changed from the set temperature Tx to the set temperature Tz, the output of the heater 13 is fixed so as to become the set temperature Tz only for the second predetermined time Lc. In the present embodiment, the setting temperature Tz = (setting temperature Tx + setting temperature Ty) / 2 is set, but the calculation method of the setting temperature Tz is not limited to this.

  Next, when the second predetermined time Lc elapses, the output of the heater 13 is adjusted so that the temperature detected by the temperature sensor 31 becomes the set temperature Ty.

  In this way, when changing from the set temperature Tx on the high temperature side to the set temperature Ty on the low temperature side, the temperature is once changed to the set temperature Tz in the middle temperature range, and then changed to the set temperature Ty after the second predetermined time has elapsed. , The body can gradually become accustomed to low-temperature water, the burden on the heart can be reduced, and rapid fluctuations in heart rate can be reduced.

  As described above, the water heater of the present invention reduces the burden on the heart by alternately discharging hot water at different temperatures in addition to the normal shower bath when the user performs a shower bath. Recovery and health promotion can be achieved, and power consumption can be reduced compared to ordinary shower baths. This is an extremely environmentally friendly water heater. In the embodiment, a heater is used as the heat source. Although the hot water heater has been described, the present invention can be applied even when the heat source is a heat source such as a heat pump or gas.

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Hot-water supply port 3 Water supply port 4 Shower hose 5 Shower head 6 Flow control valve 7 Intake pipe 8 Hot-water supply switch 9 Heat source adjustment volume 10 Heat / cool switch 10a ON button 10b OFF button 11 Hot / cold lamp 12 Tank 13 Heater 14 Hot water supply piping DESCRIPTION OF SYMBOLS 15 Water supply piping 16 Flow sensor 17 Stop cock 18 Power supply control device 19 Heater energization control element 20 Heat source control device 21 Hot / cold water control device 22 Power switch 30 Temperature volume 31 Temperature sensor 32 Temperature sensor (incoming temperature detection means)
33 Temperature sensor (outside temperature detection means)
51 Display unit 52 Operation unit

Claims (5)

A heat source for heating hot water, temperature detecting means for detecting the temperature of hot water heated by the heat source, a temperature operation unit for adjusting the temperature of hot water discharged from the heat source, a discharge unit for discharging hot water heated by the heat source, And a hot / cold switch for starting an operation of alternately discharging hot and cold water at different temperatures. When the hot / cold bath operation is started by operating the hot / cold switch, the temperature is detected for a first predetermined time. The hot water is discharged from the discharge part by adjusting the output of the heat source so that the temperature detected by the means is the temperature set by the temperature operation part, and hot water having different temperatures after the first predetermined time has elapsed. Hot water heater characterized by alternately discharging hot water. It has an incoming water temperature detecting means for detecting the temperature of hot water before being heated by a heat source, and changes the length of the first predetermined time according to the incoming water temperature detected by the incoming water temperature detecting means. The water heater according to claim 1. The outside predetermined temperature detection means which detects the temperature of outside air is provided, The length of the 1st predetermined time is changed according to the outside temperature detected by the outside air temperature detection means. Water heater. The hot water heater according to claim 1, further comprising a physical condition setting unit that sets a physical condition of the user, wherein the first predetermined time is changed according to the physical condition input by the physical condition setting unit. During the hot / cold bath operation, when the hot water is changed from the hot water to the cold water, the hot water in the middle temperature region provided between the hot water and the cold water is discharged for a second predetermined time. The hot water supply device according to any one of claims 1 to 4, wherein hot water on the low temperature side is discharged afterwards.