JP2010096381A - Storage water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a storage water heater preventing waste boiling up by performing optimal heat-retaining operation and improving energy saving performance. <P>SOLUTION: The storage water heater includes: a hot water storage tank 10 storing hot water; a bathtub 22; a reheating heat exchanger 27 for performing heat exchange between the hot water within the hot water storage tank 10 and the hot water within the bathtub 22; and first and second remote control devices 32, 33 for setting the temperature and amount of the hot water to be filled in the bathtub 22. The hot water within the hot water storage tank 10 is supplied to the bathtub 22 to automatically perform hot water filling operation. The first remote control device 32 is installed outside a bathroom, and the second remote control device 33 is installed in the bathroom. A heat-retaining start means for starting heat-retaining operation of the hot water within the bathtub 22 is arranged in the first remote control device 32. During automatic hot water filling operation to the bathtub 22, only when the heat-retaining operation is started by the heat-retaining start means, the heat-retaining operation of the hot water within the bathtub 22 is preformed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hot water storage type water heater, and particularly relates to a bath reheating function.

  Conventionally, the bath operation of this type of hot water storage type hot water heater is equipped with an automatic hot water filling function and a chasing function, and is now an indispensable function.

  In particular, the bath automatic operation function performs a warming operation every predetermined time after the bath is filled with a set water level or a set amount of water and the bath temperature is raised to a set temperature. In particular, the function of the heat retaining operation is a function that automatically detects the drop in the water level in the bathtub and refills the bathtub (adds hot water), or automatically detects the drop in the hot water temperature in the bathtub. For a predetermined time (for example, 4 hours), which is a very convenient function for the user (see, for example, Patent Document 1).

  The operation of the conventional bath automatic operation function will be described. First, when the user operates the remote control to turn on the automatic bath operation function, first, a pouring valve for filling hot water in the bathtub is opened, and the hot water mixed with the hot water in the tank and the water supply pipe is mixed with the mixing valve. Supply to the bathtub to the set water level.

  Next, when hot water filling is completed up to the set water level, the pouring valve is closed, the circulation pump is driven, the hot water in the bathtub is stirred, and the heat is exchanged with the hot water in the tank in the heat exchanger. Is heated to the set temperature.

When boiling is completed up to the set temperature, the temperature is kept for a predetermined time (for example, 4 hours). This heat retention state automatically detects a drop in the water level and adds hot water to the set water level to the bathtub, or drives the circulation pump every predetermined time to automatically detect a drop in the hot water temperature in the bathtub. Then, boiling is performed to a set temperature with a heat exchanger.
JP-A-9-170752

  However, in the conventional configuration, even if a person is not bathing, the circulation pump is periodically driven to check the hot water temperature of the bathtub every predetermined time. The cold water in the pipe enters the bathtub and stirs it, resulting in a drop in the hot water temperature in the bathtub. Use the hot water in the hot water storage tank to boil it up to the set temperature. It had to be performed, and had the subject that the amount of heat for boiling took up excessively.

  An object of the present invention is to solve the conventional problems described above, and an object of the present invention is to provide a hot water storage type hot water heater with improved energy saving performance, which performs an optimum heat retaining operation and does not perform unnecessary boiling.

In order to solve the above-described conventional problems, a hot water storage type water heater according to the present invention includes a hot water storage tank for storing hot water, a bathtub, hot water in the hot water storage tank, and hot water in the bathtub for exchanging heat. And a first remote control device and a second remote control device for setting the temperature and amount of hot water for filling the bathtub, and automatically supplying hot water in the hot water storage tank to the bathtub. A hot water storage-type water heater that performs a tension operation, wherein the first remote control device is installed outside the bathroom, the second remote control device is installed in the bathroom, and the first remote control includes hot water in the bathtub. A heat insulation start means for starting the heat insulation operation is provided, and during the automatic hot water filling operation to the bathtub, the heat insulation operation of the hot water in the bathtub is performed only when the heat insulation operation is started by the heat insulation start means. The water heater body every predetermined time Since the cold water in the pipe to the bathtub is not supplied into the bathtub, the temperature of the hot water in the bathtub is not unnecessarily lowered, and the user enters the heat retaining operation just before the user takes a bath. As a result, there is no need to use wasteful heat for heating, leading to improved energy savings.

  INDUSTRIAL APPLICABILITY The present invention can provide a hot water storage type hot water heater with improved energy saving performance that performs an appropriate heat retention operation and does not perform unnecessary boiling.

  The hot water storage type water heater of the first invention is a hot water storage tank for storing hot water, a bathtub, a reheating heat exchanger for exchanging heat between the hot water in the hot water storage tank and the hot water in the bathtub, and hot water filling the bathtub. A hot water storage type hot water supply apparatus comprising a first remote control device and a second remote control device for setting a temperature and an amount of hot water, and automatically supplying hot water in a hot water storage tank to a bathtub and performing a hot water filling operation. 1 remote control device is installed outside the bathroom and the second remote control device is installed in the bathroom, and the first remote control is provided with a heat insulation start means for starting the heat insulation operation of the hot water in the bathtub, and to the bathtub During the automatic hot water filling operation, the cold water in the pipe from the water heater main body to the bathtub every predetermined time by performing the heat insulation operation of the hot water in the bathtub only when the heat insulation operation is started by the heat insulation starting means. Is not necessary because it is not supplied into the bathtub. Also no longer that would lower the hot water temperature in the bathtub, it is possible to enter the only thermal insulation behavior just before the user to bathe, lead to even no improvement of energy-saving to use the amount of heat for boiling useless.

  The hot water storage type water heater according to the second invention is provided with a third remote control device having a heat insulation starting means for starting the heat insulation operation of the hot water in the bathtub, particularly in the first invention, and the third remote control device is a dressing room. In the automatic hot water filling operation to the bathtub, when the heat insulation operation is started by the heat insulation start means provided in the third remote control device, the user performs the heat insulation operation of the hot water in the bathtub. Since the warming operation is started just before bathing, the hot water in the bathtub is unnecessarily lowered without supplying the cold water in the piping from the water heater body to the bathtub every predetermined time. There is no need to use wasteful heat for heating, leading to improved energy savings. In addition, it is not necessary to go to the room (for example, kitchen) where the first remote control device is installed, and it is convenient to press the heat retention button in the dressing room. Since the bath temperature can be raised to the set temperature, it is possible to comfortably bathe and to improve usability.

  The hot water storage type water heater according to the third aspect of the invention is particularly characterized in that, in the second aspect of the invention, the heat retention starting means provided in the third remote control device is constituted by a human sensor, and when a person is detected by the human sensor, By performing the hot water warming operation, the human sensor automatically reacts to the warming operation simply by going to the dressing room without going to the room (for example, kitchen) where the first remote control device is installed. Therefore, it is not necessary for the user to operate, and the usability can be greatly improved. Furthermore, since the bath temperature can be raised to the set temperature before taking off the clothes and taking a bath, the bath can be taken comfortably.

  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 a configuration diagram of a hot water storage type hot water supply apparatus according to Embodiment 1 of the present invention. In FIG. 1, a hot water storage type water heater of the present invention has a hot water storage tank 10 for storing hot water, a hot water supply pipe 11 for discharging hot water at the upper part of the hot water storage tank 10, and a lower part of the hot water storage tank 10. A water supply pipe 12 for supplying water from a water supply source is provided. A plurality of thermistors 19 a to 19 c are provided on the side wall of the hot water storage tank 10 to detect the temperature of the hot water in the hot water storage tank 10.

  The water supply pipe 12 is connected from a water supply port 13 to which a water supply is connected via a pressure reducing valve 14 for reducing the water pressure. In the tank 10, hot water is separated into an upper part and water is separated into a lower part due to the difference in specific gravity, and when boiling the hot water in the hot water storage tank 10, hot water is stored from the upper part of the hot water storage tank 10, and a layer is formed so that the hot water is pushed down. Accumulated. When hot water is supplied from the hot water supply pipe 11, water is supplied from the water supply pipe 12 into the hot water storage tank 10, and the hot water storage tank 10 is always filled with hot water.

  Further, a boiling pipe 15 connected from the lower part to the upper part is connected to the hot water storage tank 10, and a boiling pump 16 and a heat source unit 17 are interposed in the boiling pipe 15. By driving the boiling pump 16, hot water at the lower part of the hot water storage tank 10 is supplied to the heat source part 17, and hot water is heated by the heat source part 17, then returned to the upper part of the hot water storage tank 10 and stored. . At this time, a heat source such as a heat pump or a heater having a heat pump cycle mechanism is used for the heat source unit 17.

  Further, a bath hot water mixing valve 23, a bath hot water thermistor 24, a bath pouring valve 25, and a bathtub 22 are provided. Hot water from the hot water supply pipe 11 and the hot water supply pipe 12 is mixed by the bath mixing valve 23 so that the bath hot water thermistor 24 has a set temperature, and the bath pouring valve 25 is opened to pour hot water into the bathtub 22. Furthermore, it branches in two directions on the downstream side of the bath pouring valve 25, and hot water passes through the first pouring passage 50 and the second pouring passage 51 and is supplied to the bathtub 22.

  The second pouring path 51 is provided with a circulation pump 26, a reheating heat exchanger 27, and a bath temperature thermistor 28, so that the reheating heat exchanger 27 can recharge the hot water in the bathtub 22. It is configured. On the other hand, the high-temperature side circuit of the reheating heat exchanger 27 is configured to be supplied with high-temperature hot water from the hot water storage tank 10, and the upper portion of the hot water storage tank 10, the reheating heat exchanger 27, and the lower portion of the hot water storage tank 10. Are connected in an annular shape to form a reheating circuit 52, and the reheating circuit 52 is provided with a heat exchange pump 29 for circulating hot water in the hot water storage tank 10.

  Then, when performing the bath warming operation, the circulation pump 26 and the heat exchange pump 29 are driven, and the driving is continued until the temperature of the bath temperature thermistor 28 reaches the set temperature.

  When the user performs hot water supply to the curan 20 and the shower 21, hot water supplied from the hot water storage tank 10 through the hot water supply pipe 11 and water supplied by the pressure reducing valve 14 through the water supply pipe 12 are reduced. The hot water mixing valve 31 is driven so that the hot water temperature becomes the target temperature to mix hot water.

  A first remote control device 32 (hereinafter referred to as a kitchen remote control) is installed in the kitchen. Further, a second remote control device 33 (hereinafter referred to as a bath remote control) is installed in the bathroom 28. The kitchen remote control 32 and the bath remote control 33 are provided with a bath automatic operation switch 34 for enabling the automatic bath filling operation function of the bath. Select Disabled. In addition, the kitchen remote controller 32 is provided with a heat retaining switch 35 as a heat retaining start means for enabling the function of the heat retaining operation of the hot water in the bathtub 22, and the heat retaining operation function is made effective by turning on / off. / Invalid is selected.

  In the hot water storage type water heater configured as described above, the heat insulation operation function of the present invention will be described below.

  In the conventional hot water storage type hot water heater having an automatic heat insulation operation function, the circulating pump 26 is driven every predetermined time, and the temperature of the hot water in the bathtub 22 is detected by the value detected by the bath temperature thermistor 28. Was. Then, when it is detected that the hot water in the bathtub 22 has fallen by a predetermined temperature from the set temperature, the heat exchange pump 29 and the circulation pump 26 are driven to replenish the hot water in the bathtub 22. However, when detecting the temperature in the bathtub 22, by driving the circulation pump 26, the cold hot water accumulated in the first pouring path 50 and the second pouring path 51 is circulated, and the tub 22 is circulated. Enter and get stirred. As a result, the temperature of the hot water in the bathtub 22 is lowered, and as a result, the time until the start of reheating is shortened, and there is a problem from the viewpoint of energy saving.

  Therefore, in the present invention, the conventional problem is solved by enabling the heat insulation operation function as follows. FIG. 2 shows a flowchart of the heat insulation operation of the present invention.

  As shown in FIG. 2, first, in step 1, the kitchen remote control 32 or the bath automatic operation switch 34 in the bath remote control 33 is operated to enable the automatic hot water operation function. As a result, the bath pouring valve 25 opens, hot water supplied from the hot water storage tank 10 through the hot water supply pipe 11 by the bath hot water supply mixing valve 23, and water supplied by the pressure reducing valve 14 through the water supply pipe 12 after being decompressed. And the hot water mixed so that the bath hot water thermistor 24 has a predetermined temperature is supplied to the bathtub 22 to the set water level. Alternatively, a set amount of hot water may be supplied to the bathtub 22.

  When the hot water filling is completed to the set water level in Step 2, the bath pouring valve 25 is closed, the circulation pump 26 is driven, the hot water in the bathtub 22 is stirred, and the reheating heat exchanger 27 is turned on. Then, heat is exchanged with hot water in the tank 10 to raise the bath temperature to the set temperature. This is because hot water may remain in the bathtub 22 in advance, and it is assumed that the temperature of the hot water has not risen to the set temperature. Then, the chasing operation is continued until the set temperature is reached, and when the set temperature is reached, the kitchen remote control 32 and the bathroom remote control 33 notify that the bath is heated by an alarm sound or a display unit.

  If the user takes a bath immediately at this time, the bath temperature is just the set temperature, so that the user can take a bath comfortably. On the other hand, there may be a case where bathing takes place at a time later than the time when the bathing is completed due to a difference in family life patterns.

  In this case, when the heat retention switch 35 provided on the kitchen remote controller 23 is pressed in step 3, the circulation pump 26 is driven, the hot water in the bathtub 22 is stirred, and the hot water storage tank 27 is used for the reheating heat exchanger 27. Heat is exchanged with 10 hot water and boiling is performed until the bath temperature thermistor 30 reaches a set temperature (steps 4 and 5).

  As described above, since the hot water warming operation of the bathtub 22 is performed only when the warming switch 35 provided on the kitchen remote controller is pressed, the warming operation can be started just before the user takes a bath, and the place away from the bathroom. Since the switch that activates the warming operation function is provided only on the remote control device, the time until the bather takes a bath after pressing the button can be secured. You can drive.

  Therefore, the cold water in the pipe from the water heater body to the bathtub 22 is inadvertently agitated in the bathtub 22 to lower the hot water temperature of the bathtub 22 and use unnecessary heat for heating. Therefore, it is possible to provide a hot water storage type water heater with improved energy saving performance. In addition, the hot water temperature in the bathtub 22 can be raised to the set temperature before going to the dressing room and taking off clothes to bathe, providing a comfortable hot water storage hot water heater that can be bathed comfortably. it can.

  A third remote control device 36 (hereinafter referred to as an additional remote controller) is disposed in the dressing room, and the additional remote controller 36 also has a heat retention switch 35. When the heat retention switch 35 of the additional remote controller 36 is pressed during automatic bath operation, the circulation pump 26 is driven, the hot water in the bathtub 22 is stirred, and the reheating heat exchanger 27 exchanges heat with the hot water in the tank 10. Then, boiling is performed until the bath temperature thermistor 30 reaches the set temperature.

  Thus, since the hot water warming operation of the bathtub 22 is performed only when the heat retaining switch 35 is pressed, the warming operation can be started only immediately before the user takes a bath. Hot water storage water heater with improved energy-saving performance, because the cold water is inadvertently agitated in the bathtub 22 so that the temperature of the hot water in the bathtub 22 is not lowered and wasteful heat is not used. Can provide.

  Further, even if it is not necessary to go to the kitchen and operate the heat retaining switch 35 of the kitchen remote controller 32, it is only necessary to press the heat retaining switch 35 of the additional remote controller 36 in the dressing room. Moreover, since the temperature of the hot water in the bathtub 22 can be raised to the set temperature before taking off the clothes and taking a bath, it is possible to bathe comfortably and provide an easy-to-use hot water storage type hot water heater.

  In addition, by installing a human sensor 37 that determines the presence or absence of a person instead of the heat retention switch 35 of the additional remote controller 36, when the additional remote controller 36 detects that there is a person in the dressing room during automatic bath operation, The structure which performs the warming-up operation | movement of 22 hot and cold water can be taken. By doing in this way, since it can enter into heat insulation operation just before a user bathes, the bathtub 22 can be made by inadvertently stirring the cold water in the pipe from the water heater body to the bathtub 22 in the bathtub 22. Therefore, it is possible to provide a hot water storage type hot water heater with improved energy saving performance without lowering the temperature of hot water and using unnecessary heat for boiling.

  In addition, just by entering the dressing room, the human sensor 37 can automatically react and enter the heat retaining operation, so that the usability is improved. Moreover, since the temperature of the hot water in the bathtub 22 can be raised to the set temperature before taking off the clothes and taking a bath, it is possible to bathe comfortably and provide an easy-to-use hot water storage type hot water heater.

  As described above, the hot water storage type hot water heater according to the present invention may use a heat source such as an electric heater, oil, or gas in addition to using a heat pump as a heat source.

Configuration diagram of hot water storage type water heater in Embodiment 1 Flow chart of heat insulation operation in Embodiment 1

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Hot water storage tank 11 Hot water supply pipe 12 Water supply pipe 15 Boiling piping 16 Boiling pump 17 Heat source part 18 Water supply temperature detection part 20 Curran 21 Shower head 22 Bathtub 23 Bath mixing valve 24 Bath hot water supply thermistor 25 Bath pouring valve 26 Circulation pump 27 Water heat exchanger 28 Bathroom 29 Heat exchange pump 30 Bath temperature thermistor 31 Hot water mixing valve 32 Kitchen remote control 33 Bath remote control 34 Bath automatic switch 35 Thermal switch

Claims (3)

A hot water storage tank for storing hot water, a bathtub, a reheating heat exchanger for exchanging heat between the hot water in the hot water storage tank and the hot water in the bathtub, and the temperature and amount of hot water for filling the bathtub are set. A hot water storage type hot water supply apparatus that includes a first remote control device and a second remote control device, automatically supplies hot water in the hot water storage tank to the bathtub, and performs a hot water filling operation, wherein the first remote control device is Installed outside the bathroom, the second remote control device is installed in the bathroom, and the first remote control is provided with a heat insulation start means for starting the heat insulation operation of the hot and cold water in the bathtub. During the hot water filling operation, the hot water storage type hot water heater is configured to perform the heat insulation operation of the hot water in the bathtub only when the heat insulation operation is started by the heat insulation start means. A third remote control device having a heat insulation start means for starting the heat insulation operation of hot water in the bathtub is provided, and the third remote control device is installed in the dressing room, and during the automatic hot water operation to the bathtub, The hot water storage type hot water heater according to claim 1, wherein when the heat insulation operation is started by the heat insulation start means provided in the third remote control device, the heat insulation operation of the hot water in the bathtub is performed. The heat retention starting means provided in the third remote control device is constituted by a human sensor, and when a human is detected by the human sensor, a hot water warming operation of the bathtub is performed. The hot water storage water heater described.

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