JP2003279127A - Hot water storage type heating system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water storage type heating system capable of restraining a temperature rise in hot water in a bathtub even if a circulating pump causes failure to stop operating, by solving a problem wherein a temperature of the hot water in the bathtub continuously rises because of still continuing heat exchange with high temperature hot water in a hot water storage tank if the failed circulating pump continues operating even if power supply to the heater is stopped. <P>SOLUTION: When detecting the operation of the circulating pump by a pump circulation detecting means such as a bath water flow switch (Step S2) though a driving signal is not outputted to the circulating pump (Step S1), the current-carrying to the heater is stopped (Step S4), and the hot water in the hot water storage tank is supplied to the bathtub by a prescribed quantity (Step S5). <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water storage tank, a heater for heating hot water in the hot water storage tank, and hot water in a bath tub using hot water in the hot water storage tank. Hot water storage type heating comprising a heat exchanger for indirect heating, a circulation pump for circulating hot water in the bathtub to the heat exchanger, and hot water supply means for supplying hot water in the hot water storage tank into the bathtub Related to the device. 2. Description of the Related Art Conventionally, in a hot water storage type heating device such as an electric water heater having a reheating function of heating a hot water in a bathtub by indirect heating with hot water in a hot water storage tank by suction by a circulation pump. When the circulating pump is turned on, it is necessary to stop energizing the heater in order to prevent the temperature of hot water in the bathtub from rising. [0003] However, even if the power supply to the heater is stopped, the circulation pump continues to operate, and the heat exchange with the hot water in the hot water storage tank continues. However, there is a problem that the temperature of hot and cold water in the bathtub keeps rising. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a hot water storage type heating device capable of suppressing a rise in temperature of hot and cold water in a bathtub even when a circulation pump is turned on. It is in. [0004] In order to achieve the above object, according to the first aspect of the present invention, a hot water storage tank, a heater for heating hot water in the hot water storage tank, and a hot water storage tank are provided. A heat exchanger for indirectly heating the hot water in the bathtub with hot water, and a bath pipe for connecting the bathtub and the heat exchanger are provided, and in the middle of the bath pipe, hot water in the bathtub is provided. A circulation pump for circulating to the heat exchanger, a temperature detection unit for detecting a temperature of hot and cold water in the bathtub, and a pump circulation detection unit for detecting whether or not the circulation pump operates. A hot water supply device that branches from the hot water storage tank to the bath pipe and supplies hot water in the hot water storage tank into the bath tub. When the operation of the circulating pump is detected by the pump circulating detecting means even though the driving signal to the circulating pump is not output from the control unit for controlling the circulation, the power supply to the heater is stopped. The hot water in the hot water storage tank is forcibly supplied into the bath tub by the hot water supply means from the hot water supply means, so that when the circulation pump is turned on, the hot water in the hot water storage tank is forcibly supplied to the bath tub. And
New water is supplied into the hot water storage tank, the temperature of the hot water in the hot water storage tank decreases, and the rise in the temperature of the hot water in the bath tub can be suppressed. Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration diagram of an electric water heater 100 according to one embodiment of the present invention. First, water from a water supply source is depressurized by a pressure reducing valve 1, and is branched into a water supply pipe 2 and a bypass pipe 3 downstream of the pressure reducing valve 1. The bypass pipe 3 communicates with the hot water supply mixing valve 10 on the downstream side, and includes a water supply temperature sensor 17 for detecting a water supply temperature. The water supply pipe 2 communicates with a hot water storage tank 20, and a lower heater 21 and an upper heater 22 are attached to the hot water storage tank 20. The water in the hot water storage tank 20 is supplied to the lower heater 21 and the upper heater 22.
As a result, the lower heater 21 is connected to the tank first temperature sensor 2
4. The upper heater 22 is heated so that the temperature detected by the tank third temperature sensor 26 becomes high. Further, a drain valve 34 is provided below the hot water storage tank 20. Also,
A safety valve 33 is provided at an upper portion of the hot water storage tank 20 to release expansion water generated when the water in the hot water storage tank 20 is heated. In the hot water mixing valve 10 driven by a stepping motor, water from the bypass pipe 3 and high-temperature water from the high-temperature hot water pipe 4 are mixed, and hot water of an appropriate temperature is supplied to the hot-water pipe 8. The hot water supply pipe 8 is provided with a hot water supply temperature sensor 16 for detecting hot water supply temperature, and a hot water supply flow rate sensor 14 as hot water supply detection means for detecting supply of hot water to the hot water supply pipe 8. Further, the hot water supply pipe 4 is provided with a high temperature water temperature sensor 18 for detecting the temperature of the high temperature water supplied from the hot water storage tank 20. The hot water supply pipe 5 branched from the hot water supply pipe 4 communicates with the hot water mixing valve 11 via a first solenoid valve 12 for starting / stopping the supply of high temperature water. On the other hand, the hot water supply pipe 7 branched from the bypass pipe 3 is connected to the hot water mixing valve 11 via a second solenoid valve 13 for starting / stopping water supply. In the hot water mixing valve 11 driven by a stepping motor,
The water from the hot water supply pipe 7 and the high temperature water from the hot water hot water supply pipe 5 are mixed, and any one of high-temperature water, water, and hot water at an appropriate temperature is supplied to the hot water supply pipe 9. The hot water supply pipe 9 has a hot water temperature sensor 19 for detecting the hot water temperature, a hot water flow sensor 15 for detecting the hot water flow supplied to the hot water supply pipe 9, and a bathtub 104. A check valve 32 for preventing backflow is provided. Further, a bath heat exchanger 23 is provided in the hot water storage tank 20, and a bathtub 104 is provided.
Is connected to the circulation adapter 105 attached to the wall surface of the bathroom pipe 31. The bath plumbing 31 has a bathtub 104.
A circulating pump P for sucking hot water from the inside into the bath heat exchanger 23 is provided, and a bath water flow switch 30 for checking whether the circulating pump P is operating is provided. Further, a bath temperature sensor 28 for detecting the temperature of hot water in the bathtub 104 and a water level sensor 29 for detecting the level of hot water in the bathtub 104 are provided. The hot water supply pipe 9 communicates with a bath pipe 31. The electric water heater 100 includes a main body control section 101, and the main body control section 101 includes a clock function section 1 described later.
The current time measured at 12 is a midnight time zone (for example, 23
From the hour to the next day at 7:00), the first daytime period (for example, from 7:00 to 17:00), or the second daytime period (for example, from 17:00 to 23:00). , A hot water temperature sensor 17, a hot water temperature sensor 18, a hot water temperature sensor 16, a hot water flow sensor 14, and a hot water temperature sensor 19.
Signal from the water filling sensor 15 and the remote controller 10
A hot water / water filling control unit 108 for controlling the hot water supply mixing valve 10, the hot water mixing valve 11, the first solenoid valve 12, the second solenoid valve 13, and the like based on the operation instruction from the control unit 2; Bath reheating control unit 110 for controlling circulation pump P to raise the temperature, detection signals of tank first temperature sensor 24 and tank third temperature sensor 26, operation instructions from remote control 102, and current time measured by remote control 102 Heater control unit 107 for controlling the lower heater 21 and the upper heater 22 based on the above, the tank first temperature sensor 24, the tank second temperature sensor 25, and the tank third temperature sensor 2
6 and a remaining hot water detecting section 10 for detecting the remaining hot water in the hot water storage tank 20 based on the temperature detected by the fourth tank temperature sensor 27.
9 and a main body communication unit 111 for mutually communicating with the remote controller 102 via the communication line 103. The remote control 102 has a clock function unit 112 for setting and clocking the current time, and a current time measured by the clock function unit 112 during the daytime (for example, from 7:00 to 23
During the day), a daytime heating provided with a full heating switch for turning on when instructing the lower heater 21 to be energized and a small heating switch for turning on when instructing the upper heater 22 to be energized. An operation unit 114, a display unit 116 that displays setting values such as a hot water temperature set by the remote controller 102 and operation information such as a remaining hot water amount detected by the remaining hot water amount detection unit 109, and a setting of hot water supplied from the hot water supply pipe 8. A temperature setting comprising a hot water supply temperature setting switch for setting the temperature, a hot water temperature setting switch for setting the set temperature of hot water to be poured into the bathtub 104, and a boiling temperature setting switch for setting the boiling temperature in the hot water storage tank 20. A section 113, a hot water switch to be turned on when hot water is applied to the bathtub 104, a hot water setting switch for setting the hot water to be applied to the bathtub 104, and the bathtub 10. An additional heating / filling operation unit 115 provided with a bath additional heating switch that is turned on when boiling water in the water, a set temperature information set by the temperature setting unit 113 through the communication line 103, and an electric water heater A communication unit 1 for mutually communicating operation information of the vehicle 100 with the main body control unit 101
17 are provided. With the above configuration, when it is recognized that the current time measured by the clock function unit 112 of the remote controller 102 is in the midnight time zone (for example, from 23:00 to 7:00 the next day), the heater control unit 107 However, the lower heater 21 is instructed to energize so that the boiling ends at the end time of the midnight time zone, and the total amount of water (for example, 370 liters) in the hot water storage tank 20 is controlled by the midnight electric power by the tank first temperature sensor 24 by remote control. Boiling is performed until the set boiling temperature set by the temperature setting unit 113 of 102 is detected. It is necessary to calculate the boiling start time in order to complete the boiling in accordance with the end time of the midnight time zone. For example, the remaining hot water calorie is calculated based on the temperature detected by the tank temperature sensor. Then, calculate the amount of heat required for boiling from the remaining hot water calorific value, calculate the time required to boil the required calorific value, and boil the time that goes back the required time from the end time of the late night time zone. Various methods such as the start time can be considered. When a hot water tap (not shown) connected from the electric water heater 100 via the hot water supply pipe 8 is opened, hot water in the boiling hot water storage tank 20 is discharged. The temperature of the spouted water can be set by the temperature setting unit 113 according to the application and preference. The hot water in the hot water storage tank 20 is supplied to the bathtub 10.
In the case of using for filling the hot water to No. 4, the hot water switch of the hot water operation section 115 is turned on. The filling temperature at this time can be set as desired by a filling temperature setting switch of the temperature setting unit 113, and the filling amount can be set according to the bathtub capacity by the filling amount setting switch of the filling operation unit 115. It is. When hot water is used in the hot water storage tank 20, water is supplied from the lower part of the hot water storage tank and the amount of remaining hot water decreases. Therefore, the user needs to use the hot water while checking the remaining hot water amount. Therefore, for example, the total capacity of the hot water storage tank 20 is set to 37
0 liter, the tank first temperature sensor 24 at a position where the capacity from the top of the hot water storage tank 20 is 300 liters,
The tank second temperature sensor 25 at the position of 150 liters,
The tank third temperature sensor 26 at the position of 100 liters,
Assuming that the tank fourth temperature sensor 27 is attached at a position of 50 liters, the remaining hot water amount detected by the remaining hot water amount detection unit 109 is based on the detected temperature of each sensor (for example, it is determined that there is remaining hot water if the temperature is 45 ° C. or more). 300 liters or more, remaining hot water volume 150 liters or more and less than 300 liters, remaining hot water volume 1
Remote hot water amount information such as 00 liters or more and less than 150 liters, remaining hot water amount of 50 liters or less and less than 100 liters, or remaining hot water amount of less than 50 liters is displayed on a remote controller 10 by numerical values or picture display.
2 is displayed on the display section 116 so that the amount of remaining hot water can be confirmed. If the amount of hot water used is likely to be short due to a visitor or the like, the entire amount of water in the hot water storage tank 20 can be turned on by turning on the switch to increase the amount of hot water even during daytime, and then turning on the switch by turning on the switch. Thus, a small amount of water (for example, 100 liters) in the hot water storage tank 20 can be boiled. Next, the operation of the electric water heater according to one embodiment of the present invention will be described with reference to FIG. First, step S1
In step S2, it is determined whether or not the drive command to the circulation pump provided in the bath pipe is issued, and when it is determined that the drive command is not issued, it is determined in step S2 whether or not the bath water flow switch is on. I do. If it is determined in step S2 that the bath water flow switch is ON, it is determined whether or not the bath temperature is high (eg, 52 ° C. or higher) (step S3). In step S3, the bath temperature is high (for example, 52
If the temperature is equal to or higher than (.degree. C.), the power supply to the heater is stopped in step S4, and the occurrence of an abnormality is notified by voice or text. Then, in step S5, a predetermined amount (for example, 100 liters) of hot water is filled in the bathtub. The hot water temperature at this time is determined by the remote controller 1 to ensure safety.
The minimum temperature of the hot water filling temperature which can be set by the hot water temperature setting switch of the temperature setting unit 113 of 02 is previously determined. If it is determined in step S1 that a drive command to the circulation pump has been issued, or if it is determined in step S2 that the bath water flow switch is not on, step S3
If it is determined that the bath temperature is not high (eg, 52 ° C. or higher), the process returns to step S1. Therefore, when the circulation pump is turned on, hot water in the hot water storage tank is forcibly supplied into the bath tub, new water is supplied from the water supply source into the hot water storage tank, and the temperature of the hot water in the hot water storage tank decreases. Therefore, it is possible to suppress a rise in the temperature of hot and cold water in the bathtub.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of an electric water heater according to one embodiment of the present invention. FIG. 2 is a flowchart showing the operation of the electric water heater according to one embodiment of the present invention. 1 ... pressure reducing valve 2 ... water supply pipe 3 ... bypass pipe 4 ... hot water supply pipe 5 ... hot water hot water supply pipe 7 ... hot water supply water pipe 8 ... hot water supply pipe 9 ... hot water supply water supply pipe 10 ... hot water supply mixing valve 11 ... hot water supply Mixing valve 12 First electromagnetic valve 13 Second electromagnetic valve 14 Hot water supply flow sensor 15 Hot water flow sensor 16 Hot water supply temperature sensor 17 Hot water temperature sensor 18 High temperature water temperature sensor 19 Hot water temperature sensor 20 Hot water storage Tank 21 Lower heater 22 Upper heater 23 Bath heat exchanger 24 Tank first temperature sensor 25 Tank second temperature sensor 26 Tank third temperature sensor 27 Tank fourth temperature sensor 28 Bath temperature Sensor 29 Water level sensor 30 Bath water flow switch 31 Bath piping 32 Check valve 33 Safety valve 34 Drain valve 100 Electric water heater 101 Body control unit 102 Remote control 103 Communication line 104 Bathtub 105 Circulation adapter 106 time zone determination unit 107 heater control unit 108 hot water supply / hot water control unit 109 remaining water amount detection unit 110 bath reheating control unit 111 main unit communication unit 112 clock function unit 113 temperature setting unit 114 daytime Boiling operation unit 115: additional heating / filling operation unit 116: display unit 117: communication unit

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Teruki Kido             43-1, Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Sun             Inside the Yupro Corporation (72) Inventor Nobuhisa Ueda             43-1, Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Sun             Inside the Yupro Corporation (72) Inventor Kiyotaka Nakano             43-1, Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Sun             Inside the Yupro Corporation (72) Inventor Toshiharu Oe             43-1, Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Sun             Inside the Yupro Corporation F term (reference) 3L024 CC17 CC30 DD03 DD17 DD23                       DD27 GG05 GG07 GG12 GG18                       GG24 GG34 GG45 HH26 HH31                       HH58

Claims (1)

Claims: 1. A hot water storage tank, a heater for heating hot water in the hot water storage tank, and a heat exchanger for indirectly heating hot water in a bath tub with the hot water in the hot water storage tank; A bath pipe for connecting the bathtub and the heat exchanger,
In the middle of the bath piping, a circulation pump for circulating hot water in the bathtub to the heat exchanger, a temperature detecting means for detecting a temperature of hot water in the bathtub, and presence or absence of operation of the circulation pump. And a hot-water supply means for branching from the hot water storage tank to the bath pipe and supplying hot water in the hot water storage tank into the bathtub. When the operation of the circulating pump is detected by the pump circulation detecting means even though a drive signal to the circulating pump is not output from a control unit for controlling the heater, the circulating pump, and the like, the heater A hot-water storage type heating device, wherein the supply of hot water to the hot-water storage tank is stopped and a predetermined amount of hot-water is supplied from the hot-water supply means into the bath tub.