JP2012132595A - Storage type water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem with a conventional storage type water heater, wherein an intermittent heating operation are repeated till the bath reservation is started, when carrying out the bath reservation operation, and thereby fuel and power are uselessly consumed for a user who intends to be absent from the begining.SOLUTION: The storage type water heater 1 has a bath reservation operation function and a means 54 accepting the bath reservation in the bath reservation operation function without starting the heating of the heating means 30 of the storage type water heater.

Description

  The present invention relates to a hot water storage type water heater that has an automatic bath filling function and can make a hot water reservation.

  The hot water storage type hot water heater has a heating means and a hot water storage section, and when the temperature of the hot water in the hot water storage section detected by a temperature sensor provided in the hot water storage section is equal to or lower than the temperature set by the temperature setting section, it is burned by the heating means. It is a hot water heater that is controlled so as not to perform combustion in the heating means when the temperature set by the temperature setting unit is exceeded. And there are various combinations in the hot water storage type water heater by changing the heating amount per unit time of the heating means and the can capacity of the hot water storage section.

  Conventionally, in various combinations of the heating means and the hot water storage section, the can capacity of the hot water storage section is 10 to 50 liters, and the water stored in the hot water storage section is heated from the water temperature (for example, 15 ° C.) by the heating means. A combination with heating means that takes about 1 to 5 minutes to elevate the temperature to the maximum set temperature (for example, 65 to 80 ° C.) is regarded as a hot water storage type water heater suitable for household use. I came. This is because the hot water storage section does not become too large so that the installation space for the hot water heater can be small, and there is a low possibility that it will be used simultaneously with multiple mixing taps. This is because the time is short, and there is an advantage that the total amount of hot water per day used in the hot water storage type hot water heater can be increased and decreased in a short time.

  Hot water storage water heaters always have hot water at a constant temperature in the hot water storage section, so that when the mixing tap is opened, hot water at a constant temperature comes out quickly, and the hot water temperature is stable. It is necessary to always store a certain amount of hot water heated to a constant temperature in the hot water storage section. For this reason, when the hot water storage type hot water heater is not used for a long time, it is inevitable that heat is generated from the hot water storage part to the surroundings, and the heating means heats the hot water stored in the hot water storage part at a predetermined interval to the set temperature. The operation of repeating the operation was performed. Although it is technically possible to reduce the heat dissipation from the hot water storage part to some extent by improving the thermal insulation performance of the hot water storage part, there is a limit to improving the thermal insulation performance considering cost effectiveness. there were.

  In addition, when the heating means is a combustion device, there is a passage through which the combustion gas of the heating means passes, a so-called flue, and the heat generated by the heating means is transferred to the hot water storage section through the flue. Therefore, due to the structure of the flue, natural convection of the outside air occurs in the flue, and hot water storage hot water heaters with higher thermal efficiency cause a phenomenon that more heat stored in the hot water storage part is lost due to this natural convection. there were.

  Moreover, the main use of the domestic hot water storage type water heater is to fill a bathtub with hot water, and various methods for performing this easily have been considered (Patent Document 1). In order to automate hot water filling, a solenoid valve is installed inside the hot water storage water heater, and the function of automatically filling hot water in the circulation piping for reheating connected to the bathtub (hereinafter referred to as “automatic hot water filling function”). Some have abbreviated). And, in order to automatically perform this automatic filling function at a predetermined time, a bath reservation operation function for starting automatic filling at a predetermined time on an operation panel provided in a kitchen or the like was also provided. .

  The fact that automatic hot water filling is possible with the bath reservation operation function is a convenient function that will not forget the bath preparation even if the user is at home, but in homes where there is no daytime due to double working etc. Was a particularly useful feature. This is because even if you are absent during the day, you can take a bath right after you get home. In this case, the user should wash the bathtub before going out in the morning so that the bathtub can be filled with water anytime. At the same time, the operation switch of the hot water storage water heater is turned on on the operation panel, and then the bath reservation operation function is started. It was possible to take a bath after returning home by turning on the switch and setting the hot water filling end time.

JP 2001-241754 A

  However, in the conventional hot water storage type hot water heater, when performing the bath reservation operation, the hot water storage type water heater needs to be in the state where the operation switch is turned on, and in the state where the operation switch is turned on, the operation panel is set. The heating means starts heating the hot water storage section so as to reach the set temperature, and thereafter the heating means performs an intermittent heating operation so that the temperature of the hot water stored in the hot water storage section is always maintained at the set temperature.

  This intermittent heating operation is not a problem when the user is always at home and uses hot water stored in a hot water storage hot water supply for housework, etc. In some cases, the absence time during the day will cause an absence time of about 10 hours considering the general working hours and commuting time. During the absence of a hot water storage hot water heater for 10 hours, the heating means of the hot water storage hot water heater subtracted the differential (operation gap) temperature from the set temperature due to the heat dissipation of the hot water stored in the hot water storage section. When the temperature reaches, the heating means starts heating, and when the temperature reaches the set temperature, the heating means stops the heating intermittently. And since the heating operation of the heating means performed intermittently consumes fuel and electric power, in terms of running cost of the hot water storage type hot water heater, it is fuel for the user who intends to be absent from the beginning. And there was a problem of wasting power.

  In addition, the amount of wasteful consumption due to the absence of fuel and electric power depends on factors such as the capacity of the hot water storage section of the hot water storage water heater, the heat retention performance of the hot water storage section, the heating method and output of the heating means, the set temperature, and the outside air temperature. Although it will be different, as an actual measurement example, a hot water storage hot water supply unit with a general heat insulation in the hot water storage unit, the hot water storage unit capacity of 15 liters, the heating means is a kerosene combustor and the output is 45 kW, the set temperature is When the external temperature was set to 70 ° C. and 15 ° C., heat dissipation of 360 kJ / h was generated from the hot water storage section.

  In order to solve the above problems, the present invention takes the following technical means.

The hot water storage type water heater of the first invention has a bath reservation operation function, and has means for accepting a bath reservation in the bath reservation operation function without starting heating of the heating means of the hot water storage type water heater. .
According to a second aspect of the present invention, there is provided a hot water storage type water heater according to the first aspect of the invention, wherein the means for accepting a bath reservation in the bath reservation operation function without starting heating of the heating means is an operation provided in the hot water storage type water heater. It is executed by pressing the board heating prohibition bath reservation switch.
According to a third aspect of the present invention, there is provided a hot water storage type water heater according to the first aspect of the invention, wherein the means for accepting a bath reservation in the bath reservation operation function without starting heating of the heating means is an operation provided in the hot water storage type water heater. It is executed by pressing the bath reservation switch while the operation switch of the panel is off.

  Having the technical means as described above has the following effects.

  According to the first invention, by having the means for accepting the bath reservation in the bath reservation operation function without starting heating of the heating means of the hot water storage type hot water heater, the user is absent during the day due to working together, etc. If there is an intention to make it, it is possible to select to operate the means for accepting the bath reservation in the bath reservation operation function without starting heating of the heating means of the hot water storage type hot water heater, and during the absence of the user It is possible to provide a hot water storage type water heater capable of prohibiting unnecessary heating of the heating means.

  According to the second invention, the means for accepting the bath reservation in the bath reservation operation function without using the heating means of the first invention is the heating prohibition reservation switch of the operation panel provided in the hot water storage type hot water heater. Therefore, when the bath reservation switch is turned on after the operation switch is turned on, the user is absent until the bath reservation operation starts, so it is determined that there is no need to start heating of the heating means. Then, by pressing the heating prohibition bath reservation switch, it is possible to easily select the prohibition of heating of the heating means, and it is possible to provide a hot water storage type hot water heater capable of filling the bath after the heating prohibition time has elapsed.

  According to the third invention, the means for accepting the bath reservation in the bath reservation operation function without using the heating means of the first invention using the first invention is that the operation switch of the operation panel provided in the hot water storage type hot water heater is off. In this state, the user presses the bath reservation switch, so the user is absent until the bath reservation operation starts, so if it is determined that the heating means need not start heating, the operation switch is turned off. By simply pressing the bath reservation switch, if the operation switch is on, turning off the operation switch and then pressing the bath reservation switch allows you to easily select the prohibition of heating of the heating means without increasing the number of switches. In addition, a hot water storage type hot water supply apparatus that can perform bath filling after elapse of the heating inhibition time can be provided.

1 is a schematic configuration diagram of a hot water storage type hot water supply apparatus according to the present invention. It is a schematic block diagram of the hot water storage type water heater of the other Example which concerns on this invention.

  Embodiments for carrying out the invention will be specifically described with reference to the drawings.

  A schematic configuration when the heating means provided in the hot water storage type hot water heater 1 of the present invention is a kerosene combustor will be described with reference to FIG. The hot water storage type water heater 1 is roughly divided into a hot water storage section 10, a heating means 30 that is a kerosene combustor, a control device 40, and an operation panel 50.

  The hot water storage unit 10 is connected to the water supply via a pressure reducing valve 12 that communicates with a water supply pipe 11 provided at the lower part of the hot water storage unit 10. The upper part of the hot water storage unit 10 is connected to a hot water supply pipe 13 and is connected to a hot water tap 5 provided in the vicinity of the external bathtub 6 or the sink 8 of the kitchen. The hot water supply pipe 13 has a hot water filling pipe 14 branched in the middle, and a hot water filling valve 15 and a double check valve 16 are provided in the middle of the hot water filling pipe 14. In addition, a temperature sensor 17 is provided in the upper part of the hot water storage unit 10.

  Inside the hot water storage section 10, a reheating heat exchanger 20 is provided, and a circulation pipe 21 and a circulation pipe are provided between the hot water storage type hot water heater 1 and the circulation fitting 7 provided in the bathtub 6 outside. The return pipe 22 is connected. A circulation pump 23 is provided in the middle of the circulation forward pipe 21, and when the circulation pump 23 is driven, a reheating heat exchanger 20, a circulation forward pipe 21, a circulation fitting 7 (tub 6), and a circulation return pipe are provided. A circulation circuit 24 that returns from 22 to the reheating heat exchanger 20 is formed.

  A hot water filling pipe 14 communicates with the circulation outgoing pipe 21, and the hot water filling valve 15 is opened, so that the hot water filling pipe 13, the hot water filling pipe 14, the circulation outgoing pipe 21, and the circulation fitting 7 are connected to the bathtub 6. A hot water passage that communicates with the water is formed. The hot water filling function is exhibited by the hot water flowing through the hot water filling road.

  The heating means 30 which is a kerosene combustor pressurizes and sprays kerosene supplied from an external kerosene tank (not shown) with a pressurizing device, mixes it with air sent by a blower, and ignites it with an ignition device. The kerosene pressurizing device, the blower, and the ignition device provided in the heating means 30 are electrically controlled.

  The control device 40 includes a CPU (central processing unit) processing device, a storage device such as a ROM and a RAM, and a switching circuit. The control device 40 receives electrical signals from the temperature sensor 17 and the operation panel 50, and fills the hot water valve. 15. The heating means 30 and the circulation pump 23 are controlled by electrically processing the various controls according to the contents programmed in advance in the storage device.

  The operation panel 50 is input from the input unit 51 for giving a command such as the start of the operation of the hot water storage hot water heater 1 by the user and the contents of the operation, and the operation status of the hot water hot water heater 1 or the user by the input unit 51. And a display unit 61 for indicating the state of being performed. The operation panel 50 is a remote control panel (remote control) installed at a location away from the hot water storage type water heater 1, and the operation panel 50 may be installed on the outer surface of the hot water storage type water heater 1.

  The input unit 51 is provided with various switches according to the function of the hot water storage type hot water heater 1. The operation switch 52, the bath reservation switch 53, the heating prohibition bath reservation switch 54, hot water related to the hot water storage type hot water heater 1 of the present invention are provided. The tension temperature setting switches 55 and 56, the hot water amount setting switches 57 and 58, and the bath reservation time setting switch 59 are provided at least. In addition, in terms of the function of the hot water storage type water heater 1, it is more convenient for the user to provide a reheating switch, a hot water filling switch, a hot water temperature setting switch, etc. in the input unit 51, but it is not directly related to the present invention. The illustration and description of this switch are omitted. In addition, the hot water supply set temperature is set to be fixed at 70 ° C. in the present embodiment, but may be variable.

  The operation switch 52 is a switch for starting the entire operation of the hot water storage type hot water heater 1. By pressing (turning on) the operation switch 52, it is confirmed that the temperature of the hot water in the hot water storage unit 10 is equal to or lower than the set temperature. When the temperature sensor 17 detects, the control device 40 controls the heating unit 30 to heat the hot water storage unit 10. The reception of the input unit 51 other than the operation switch 52 of the operation panel 50 and the display of the display unit 61 are also started by pressing the operation switch 52. When the operation switch 52 is pressed again (turned off) after the entire operation of the hot water storage water heater 1 is started, the operation of the hot water storage water heater 1 is stopped, the heating means 30 does not start heating, and the operation panel Inputs from the input unit 51 other than the 50 operation switches 52 are not accepted.

  The bath reservation switch 53 is a switch that performs the bath reservation operation function. The bath reservation operation function is an operation in which the user can reserve starting the hot water filling function at a time (future) ahead of the current time. That is. By pressing the bath reservation switch 53 while the operation switch 52 is on, the hot water filling temperature setting switches 55 and 56, the hot water filling amount setting switches 57 and 58, and the bath reservation time setting switch 59 can be set. The hot water filling temperature can be set with the hot water filling temperature setting switches 55 and 56, the hot water filling amount can be set with the hot water filling amount setting switches 57 and 58, and the bath filling time setting switch 59 can A reservation time can be set. Each time the hot water temperature setting switch 55 is pressed, the hot water temperature setting temperature decreases, and every time the hot water temperature setting switch 56 is pressed, the hot water temperature setting temperature increases. Each time the hot water filling amount setting switch 57 is pressed, the hot water filling amount decreases, and every time the hot water filling amount setting switch 58 is pressed, the hot water filling amount increases.

  As for the hot water filling temperature, about 42 ° C. is normally a temperature suitable for bathing, so that the adjustment of about 5 ° C. up and down with 42 ° C. as a center value can be set by the hot water temperature setting switches 55 and 56. It has become. With respect to the amount of hot water filling, the capacity of a general household bathtub is about 200 liters, and therefore, the hot water filling amount setting switches 57 and 58 can be adjusted to about 100 liters with 200 liters as a center value. Regarding the measurement of the hot water filling amount, the hot water filling amount per unit time is obtained as the design flow rate. Therefore, the hot water filling amount is adjusted by changing the valve opening time of the hot water filling valve 15. Regarding the adjustment of the hot water filling amount, a water amount sensor may be provided in the hot water filling pipe 14 and the timing of closing the hot water filling valve 15 may be controlled by measuring the hot water filling amount.

  As for the reserved time, the time from the current time until the scheduled reserved operation starts is set, and a time of about 5 to 15 hours is selected with a central value of 10 hours considered as a general outing time. It is possible. Regarding the bath reservation time, when the operation panel 50 has a time display function, the current time setting function is required, so that the bath reservation time can be set at the same time, and the time at which the bath reservation starts is set. You may make it set.

  The heating prohibition bath reservation switch 54 is a switch that the user reserves to start the hot water filling function at (future) time ahead of the current time in the same manner as the bath reservation switch 53. Depending on the condition that the operation switch 52 is pressed (turned on), heating of the heating means 30 starts, but after the operation switch 52 is pressed, when the heating prohibition bath reservation switch 54 is pressed, The heating means 30 does not start heating even if the heating conditions are met. When the heating prohibition bath reservation switch 54 is pushed and the control device 40 performs control according to a predetermined program, the bath reservation operation function is accepted without starting the heating of the heating device 30. Description of the settings of the hot water filling temperature setting switches 55 and 56, the hot water filling amount setting switches 57 and 58, and the bath reservation time setting switch 59 is the same as that of the bath hot water reservation switch 53, and thus the description thereof is omitted.

  The display unit 61 includes a hot water temperature display 62 for displaying the temperature set by the hot water temperature setting switches 55 and 56, a heating display 63 for displaying when the heating means 30 starts heating, and a hot water temperature setting switch 57. , 58 and a bath reservation time display 65 for displaying the time set by the bath reservation time setting switch 59.

  The operation panel 50 and the control device 40 are connected by a signal line 41, and the change of the setting contents is transmitted from the input unit 51 to the control device 40. The hot water storage type hot water heater 1 is controlled so as to display the status of operation.

  With the above configuration, when the depressurized tap water is supplied to the hot water storage unit 10 in the hot water storage type hot water heater 1, the tap water is stored therein and the heating means 30 provided at the lower part of the hot water storage unit 10 burns. The temperature of the tap water is raised by exchanging heat with the combustion gas generated. The control device 40 controls the heating means 30 so that the temperature of the tap water stored in the hot water storage unit 10 detected by the temperature sensor 17 becomes the hot water supply set temperature (70 ° C.). The heated tap water in the hot water storage section 10 can be supplied with hot water by supplying it to the hot water tap 5 (hot water supply function). In addition, the heated tap water in the hot water storage section 10 can be filled with the hot water filling valve 15 (a hot water filling function). The reheating heat exchanger 20 can indirectly heat the hot water in the bathtub 6 by the heated hot water in the hot water storage unit 10, and the circulating pump 23 is driven to circulate the hot water in the bathtub 6 in the circulation circuit 24. Then, the hot water stored in the bathtub 6 can be tracked (tracking function). The setting, starting, ending, and the like of the hot water supply, hot water filling, and reheating functions of the hot water storage type hot water heater 1 are performed by operating the input unit 51 of the operation panel 50. Can be confirmed on the display unit 61 of the operation panel 50.

  When the user starts the reserved bath operation with the hot water storage type hot water heater 1, the operation switch 52 is pressed (turned on). Next, if the user does not plan to go out and wants to make the hot water immediately available with the hot-water tap 5, the bath reservation switch 53 is pressed to enter the bath reservation operation standby state. In the standby reservation standby state, the temperature sensor 17 constantly detects the temperature of the hot water stored in the hot water storage unit 10, and when the control device 40 determines that the temperature has fallen below the hot water supply set temperature (70 ° C.), the heating means Heating at 30 is started and heated to the hot water supply set temperature, and the hot water heated to the hot water supply set temperature is constantly stored in the hot water storage section 10 of the hot water storage type hot water heater 1. Therefore, the hot water storage type hot water heater 1 supplies hot water at the hot water supply set temperature immediately when the user opens the hot water tap 5 in the standby reservation operation standby state. If the bath reservation time set by the bath reservation time setting switch 59 is reached while the bath reservation operation standby state is maintained, the hot water filling valve 15 is opened by the control device 40, and at the same time, the hot water filling temperature setting switch is changed from the hot water supply set temperature. The hot water filling starts after changing to the hot water filling temperature set in 55 and 56. When the hot water filling amount set by the hot water filling amount setting switches 57 and 58 is reached, the control device 40 closes the hot water filling valve 15 and the bath reservation operation is finished.

  If the user is scheduled to go out and there is no need to make the hot water immediately available with the hot-water tap 5, the heating-prohibited bath reservation switch standby state is entered by pressing the heating-prohibited bath reservation switch 54. This is a state where the bath reservation in the bath reservation operation function is accepted without starting the heating of the heating means 30. In the heating prohibited bath reserved operation standby state, heating by the heating means 30 is not started even when the temperature of the hot water stored in the hot water storage section 10 is lower than the hot water supply set temperature. If the time reserved by the bath reservation time setting switch 59 is reached while the heating prohibited bath reserved operation standby state is maintained, the control device 40 detects the temperature of the hot water stored in the hot water storage section 10 by the temperature sensor 17, and Heating by the heating means 30 is started so that the temperature set by the tension temperature setting switches 55 and 56 is reached. At the same time, the hot water filling valve 15 is opened, and hot water filling is started at the hot water filling temperature set by the hot water filling temperature setting switches 55 and 56. When the hot water filling amount set by the hot water filling amount setting switches 57 and 58 is reached, the control device 40 closes the hot water filling valve 15 and the bath reservation operation is finished.

  When an operation at the input unit 51 of the operation panel 50, for example, a hot water temperature setting switch 55, 56 or a hot water temperature setting switch 57, 58 is pressed during standby for the heating prohibition bath reservation operation, the user stays at home. Therefore, the control device 40 may determine to cancel the heating prohibited bath reserved operation standby state and shift to the bath reserved operation standby state. Further, the hot water filling valve 15 is opened at the time reserved by the bath reservation time setting switch 59. Heating by the heating means 30 is started first, and the hot water of the hot water storage section 10 detected by the temperature sensor 17 is detected. The closing of the hot water filling valve 15 may be delayed until the time when the control device 40 determines that the temperature has reached the temperature set by the hot water filling temperature setting switches 55 and 56.

  Further, in either of the reserved bath operation standby state and the heating prohibited bath reserved operation standby state, the user does not open the hot water filling valve 15 at the time reserved by the bath reservation time setting switch 59 but the user can Since the time set by the reservation time setting switch 59 may be considered as a time for bathing, the time until the filling of water is completed at the time set by the bath reservation time setting switch 59 (for example, about 30 minutes) In anticipation, the start time of the bath reservation operation may be a time that is advanced from the time set by the bath reservation time setting switch 59.

  A schematic configuration when the heating means provided in the hot water storage type hot water heater 2 of the present invention is a kerosene combustor will be described with reference to FIG. The hot water storage type water heater 2 is roughly divided into a hot water storage section 10, heating means 30 that is a kerosene combustor, a control device 40a, and an operation panel 50a. Since the second embodiment is a case where the hot water storage type water heater 1 and the control device 40 of the first embodiment are changed to the control device 40a and the operation panel 50 is changed to the operation panel 50a, common portions are denoted by the same reference numerals. The configuration of the hot water storage type water heater 2 will be described only for the control device 40a and the operation panel 50a.

  The control device 40a includes a CPU (central processing unit) processing device, a storage device such as a ROM and a RAM, and a switching circuit. The control device 40a receives electrical signals from the temperature sensor 17 and the operation panel 50a, and receives a hot water filling valve. 15. The heating means 30 and the circulation pump 23 are controlled by electrically processing the various controls according to the contents programmed in advance in the storage device.

  The operation panel 50a is input from the input unit 51a by an input unit 51a for giving a command such as a start of the operation of the user to the hot water storage type water heater 2 and the contents of the operation, and an operation state of the hot water storage type hot water heater 2 by the user. And a display unit 61 for indicating the state of being performed. The operation panel 50 a is a remote control panel (remote control) installed at a location away from the hot water storage type water heater 2, and the operation panel 50 a may be installed on the outer surface of the hot water storage type water heater 2.

  The input unit 51a is provided with various switches according to the function of the hot water storage type hot water heater 2, but the operation switch 52, the bath reservation switch 53, the hot water filling temperature setting switches 55 and 56 related to the hot water storage type hot water heater 2 of the present invention. The hot water filling amount setting switches 57 and 58 and the bath reservation time setting switch 59 are provided at least. In addition, it is more convenient for the user to provide the input unit 51a with a reheating switch, a hot water filling switch, a hot water supply temperature setting switch, etc. in terms of the function of the hot water storage type water heater 2, but it is not directly related to the present invention. The illustration and description of this switch are omitted. In addition, the hot water supply set temperature is set to be fixed at 70 ° C. in the present embodiment, but may be variable.

  The operation switch 52 is a switch for starting the entire operation of the hot water storage type hot water heater 2, and when the operation switch 52 is pressed (turned on), the temperature of the hot water in the hot water storage unit 10 is equal to or lower than the hot water supply set temperature. Is detected by the temperature sensor 17, the control device 40 a controls the heating means 30 to heat the hot water storage unit 10. In addition, the reception of the input unit 51a other than the operation switch 52 and the bath reservation switch 53 of the operation panel 50a and the display of the display unit 61 are also started by pressing the operation switch 52. When the operation switch 52 is pushed again (turned off) after the entire operation of the hot water storage type water heater 2 is started, the operation of the hot water storage type water heater 2 is stopped, and the heating means 30 does not start heating, and the operation panel Inputs from the input unit 51a other than the operation switch 52 and the bath reservation switch 53 of 50a are not accepted.

  The bath reservation switch 53 is a switch that performs the bath reservation operation function. The bath reservation operation function is an operation in which the user can reserve starting the hot water filling function at a time (future) ahead of the current time. That is. Regardless of whether the operation switch 52 is on or off, the hot water filling temperature setting switches 55 and 56, the hot water filling amount setting switches 57 and 58, and the bath reserved time setting switch 59 can be set by pressing the bath reservation switch 53. It becomes. The hot water filling temperature can be set with the hot water filling temperature setting switches 55 and 56, the hot water filling amount can be set with the hot water filling amount setting switches 57 and 58, and the bath filling time setting switch 59 can A reservation time can be set. Then, it is possible to control the case where the bath reservation switch 53 is pressed while the operation switch 52 is in the off state by the control device 40a to control according to the determined program without starting the heating of the heating means 30. This is a means for accepting bath reservations in the function.

  As for the hot water filling temperature, about 42 ° C. is normally suitable for bathing, and adjustment of about 5 ° C. up and down with 42 ° C. as the center value can be set by the hot water temperature setting switches 55 and 56. As for the amount of hot water filling, the capacity of a general household bathtub is about 200 liters, and therefore, adjustment of about 100 liters up and down with 200 liters as a center value is possible with the hot water amount setting switches 57 and 58. Regarding the measurement of the hot water filling amount, the hot water filling amount per unit time is obtained as the design flow rate. Therefore, the hot water filling amount is adjusted by changing the valve opening time of the hot water filling valve 15. Regarding the adjustment of the hot water filling amount, a water amount sensor may be provided in the hot water filling pipe 14 and the timing of closing the hot water filling valve 15 may be controlled by measuring the hot water filling amount.

  As for the reserved time, the time from the current time until the scheduled reserved operation starts is set, and a time of about 5 to 15 hours is selected with a central value of 10 hours considered as a general outing time. It is possible. As for the bath reservation time, when the time display function is provided on the operation panel 50a, the current time setting function is required, so that the bath reservation time can be set at the same time, and the bath reservation start time is set. You may make it set.

  The display unit 61 includes a hot water temperature display 62 for displaying the temperature set by the hot water temperature setting switches 55 and 56, a heating display 63 for displaying when the heating means 30 starts heating, and a hot water temperature setting switch 57. , 58 and a bath reservation time display 65 for displaying the time set by the bath reservation time setting switch 59.

  The operation panel 50a and the control device 40a are connected by a signal line 41, and the change of the setting contents is transmitted from the input unit 51a to the control device 40a. The control state and the result are transmitted from the control device 40a to the operation panel 50a. The hot water storage type hot water heater 2 is controlled so as to display the status of operation.

  With the above configuration, when the depressurized tap water is supplied to the hot water storage unit 10 in the hot water storage type hot water heater 2, the tap water is stored therein, and the heating means 30 provided at the lower part of the hot water storage unit 10 burns. The temperature of the tap water is raised by exchanging heat with the combustion gas generated. The control device 40a controls the heating means 30 so that the temperature of the tap water stored in the hot water storage unit 10 detected by the temperature sensor 17 becomes the hot water supply set temperature (70 ° C.). The heated tap water in the hot water storage section 10 can be supplied with hot water by supplying it to the hot water tap 5 (hot water supply function). In addition, the heated tap water in the hot water storage section 10 can be filled with the hot water filling valve 15 (a hot water filling function). The reheating heat exchanger 20 can indirectly heat the hot water in the bathtub 6 by the heated hot water in the hot water storage unit 10, and the circulating pump 23 is driven to circulate the hot water in the bathtub 6 in the circulation circuit 24. Then, the hot water stored in the bathtub 6 can be tracked (tracking function). The setting, starting, ending, etc. of the hot water supply, hot water filling, and reheating functions of the hot water storage type water heater 2 are performed by operating the input unit 51a of the operation panel 50a. Can be confirmed on the display unit 61 of the operation panel 50a.

  When the user starts a bath reservation operation with the hot water storage type hot water heater 2, the operation switch 52 is pressed (turned on). Next, if the user does not plan to go out and wants to make the hot water immediately available with the hot-water tap 5, the bath reservation switch 53 is pressed to enter the bath reservation operation standby state. In the standby reservation standby state, the temperature sensor 17 constantly detects the temperature of the hot water stored in the hot water storage unit 10, and when the control device 40a determines that the temperature has fallen below the hot water supply set temperature (70 ° C.), the heating means Heating at 30 is started and heated to the hot water supply set temperature, and the hot water heated to the hot water supply set temperature is constantly stored in the hot water storage section 10 of the hot water storage type hot water heater 2. Therefore, in the bath reservation standby state, the hot water storage type hot water heater 2 supplies hot water at a hot water supply set temperature as soon as the user opens the hot water tap 5. If the bath reservation time set by the bath reservation time setting switch 59 is reached while the bath reservation operation standby state is maintained, the hot water filling valve 15 is opened by the control device 40a, and at the same time, the hot water filling temperature setting switch is changed from the hot water supply setting temperature. The hot water filling starts after changing to the hot water filling temperature set in 55 and 56. When the hot water filling amount set by the hot water filling amount setting switches 57 and 58 is reached, the control device 40a closes the hot water filling valve 15 and the bath reservation operation is finished.

  If the user is scheduled to go out and there is no need to make the hot water immediately available with the hot-water tap 5, press the bath reservation switch 53 while the operation switch 52 is off, and the heating prohibition bath reservation is made. It becomes a driving standby state. In the heating prohibition reserved operation standby state, heating by the heating means 30 is not started even when the temperature of the hot water stored in the hot water storage section 10 is lower than the set temperature. While the heating prohibited bath reserved operation standby state is maintained, if the time reserved by the bath reservation time setting switch 59 is reached, the control device 40a detects the temperature of the hot water stored in the hot water storage section 10 with the temperature sensor 17, Heating by the heating means 30 is started so that the temperature set by the hot water filling temperature setting switches 55 and 56 is reached. At the same time, the hot water filling valve 15 is opened, and hot water filling is started at the hot water filling temperature set by the hot water filling temperature setting switches 55 and 56. When the hot water filling amount set by the hot water filling amount setting switches 57 and 58 is reached, the control device 40a closes the hot water filling valve 15 and the reserved operation ends.

  Used when an operation at the input unit 51a of the operation panel 50a, for example, an operation switch 52, a hot water temperature setting switch 55, 56, or a hot water amount setting switch 57, 58 is pressed during the standby operation for heating prohibited bath Since it can be determined that the person is at home, the controller 40a may determine to cancel the heating prohibited bath reserved operation standby state and shift to the bath reserved operation standby state. Further, the hot water filling valve 15 is opened at the time reserved for the hot water reservation time setting switch 59, but the heating by the heating means 30 is started first, and the temperature detected by the temperature sensor 17 is the hot water temperature setting. The closing of the hot water filling valve 15 may be delayed until the time when the control device 40a determines that the temperature set by the switches 55 and 56 has been reached.

  Further, in either of the reserved bath standby state and the heating prohibited bath reserved standby state, the user does not open the hot water filling valve 15 at the time reserved by the reserved time setting switch 59 but the user makes a bath reservation. Since the time set by the time setting switch 59 may be considered to be a time for bathing, the time required for the hot water filling to be completed at the time set by the bath reservation time setting switch 59 is expected (for example, about 30 minutes). ) The start time of the bath reservation operation may be a time that is ahead of the time set by the bath reservation time setting switch 59.

1, 2: Hot water storage type water heater 5: Hot water tap 6: Bathtub 7: Circulation fitting 8: Sink 10: Hot water storage part 11: Water supply pipe 12: Pressure reducing valve 13: Hot water supply pipe
14: Hot water filling pipe 15: Hot water filling valve 16: Double check valve 17: Temperature sensor 20: Reheating heat exchanger 21: Circulation forward pipe 22: Circulation return pipe 23: Circulation pump 24: Circulation circuit 30: Heating Means 40, 40a: control device 41: signal line 50, 50a: operation panel 51, 51a: input unit 52: operation switch 53: bath reservation switch 54: heating prohibition bath reservation switch 55, 56: hot water temperature setting switch 57, 58: Filling amount setting switch 59: Bath reservation time setting switch 61: Display unit 62: Filling temperature display 63: Heating display 64: Filling amount display 65: Bath reservation time display

Claims (3)

  A hot water storage type water heater having a bath reservation operation function, characterized in that it has means for accepting a bath reservation in the bath reservation operation function without starting heating of the heating means of the hot water storage type water heater. .   The means for accepting a bath reservation in the bath reservation operation function without starting heating of the heating means is executed by pressing a heating prohibition bath reservation switch of an operation panel provided in the hot water storage type water heater. The hot water storage type water heater according to claim 1. The means for accepting the bath reservation in the bath reservation operation function without starting heating of the heating means is executed by pressing the bath reservation switch while the operation switch of the operation panel provided in the hot water storage type water heater is OFF. The hot water storage type water heater according to claim 1.

Images