JP2001227817A - Heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating device which can prevent the malfunction, such as the overflowing of hot water from a bathtub by keeping on a shutoff valve open caused by the failure to detect the filled quantity of hot water in the bathtub by detecting the wrong attachment of flow sensors attached to each of a hot water filling supply pipe and a hot water supply pipe. SOLUTION: The malfunction by the wrong connection of the sensors can be prevented by judging that the connection of both sensors are wrong (step S16) in the case a hot water filling flow sensor does not detect flow (step S6) and a hot water supply flow sensor detects the flow (step S7) even though a hot water filling solenoid valve is opened (S4), closing the solenoid valve to lock out the hot water filling oporation (step S17) and anouncing the content of an error (step S18).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a heating device for heating water.

[0002]

2. Description of the Related Art Conventionally, there has been a heating device for supplying hot water heated by a heating unit to a bathtub or a hot water tap, and a hot water flow sensor for a hot water supply pipe for supplying hot water from the heating unit to the bathtub.
Further, a hot water supply flow sensor for supplying hot water from the heating unit to the hot water tap is provided with a hot water supply flow rate sensor, respectively, so that the amount and state of hot water supplied to the bathtub or hot water tap can be detected.

[0003]

However, in the above-described conventional heating apparatus, if the mounting of the hot water flow sensor and the hot water supply flow sensor is interchanged, or the connection of the flow sensor input signal line to the control unit is interchanged, the bathtub is not used. It may not be possible to detect the amount of hot water supplied to the hot water supply or the state of hot water supplied to the hot water tap, or the hot water may overflow from the bath tub by continuing to open the shut-off valve without detecting the amount of hot water flowing into the bath tub. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a hot water supply pipe and a hot water supply pipe with a flow sensor attached to each other and a flow rate to a control unit. Detects the misconnection of the sensor input signal lines, making it impossible to detect the amount of hot water supplied to the bathtub or the state of hot water supply to the hot water tap, or to open the shut-off valve without detecting the amount of hot water supplied to the bathtub. Another object of the present invention is to provide a heating device capable of preventing a problem that hot water continuously overflows from a bathtub.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a heating unit for heating water, a hot water supply connected to a bathtub and supplying hot water from the heating unit. A pipe, a shutoff valve provided in the hot water supply pipe to supply / stop the hot water to the bathtub, and a hot water beam provided in the hot water supply pipe to detect a flow rate of the hot water supplied to the bathtub. A flow rate sensor, a hot-water supply pipe connected to the hot-water tap to supply hot water from the heating unit, a hot-water supply flow sensor provided in the hot-water supply pipe and detecting a flow rate of hot water supplied to the hot-water tap, In a heating device provided with a control unit for controlling opening and closing of a shutoff valve, the control unit includes a flow sensor erroneous connection detection unit for detecting erroneous connection between the hot water flow sensor and the hot water supply flow sensor. Therefore,
The flow sensor erroneous connection detection means can detect whether the hot water flow sensor and the hot water supply flow sensor are incorrectly connected, and cannot detect the amount of hot water supplied to the bathtub or the hot water supply state to the hot water tap. It can be prevented beforehand.

In a second aspect, a heating unit for heating water, a hot water supply pipe connected to a bathtub, a high-temperature hot water supply pipe for supplying high-temperature water supplied from the heating unit to the hot water supply pipe, A bypass pipe that bypasses the heating unit and supplies water to the hot water supply pipe; a first shut-off valve provided in the high-temperature hot water supply pipe to supply / stop the high-temperature water; and a bypass pipe provided in the bypass pipe. Supply of water from the bypass pipe /
A second shut-off valve for performing a stop, a hot water flow sensor provided in the hot water supply pipe for detecting a flow rate of hot water supplied to the bathtub, and a high temperature from the heating unit connected to the hot water tap. A hot water supply pipe for supplying water, a hot water flow sensor provided in the hot water supply pipe for detecting a flow rate of hot water supplied to a hot water tap, and a control for controlling opening and closing of the first and second shut-off valves And a flow sensor erroneous connection detection means for detecting erroneous connection between the hot water flow sensor and the hot water supply flow sensor. Therefore, the flow sensor erroneous connection detection means can detect the presence or absence of the erroneous connection between the hot water flow sensor and the hot water supply flow sensor, and cannot detect the amount of hot water supplied to the bathtub or the supply state of hot water to the hot water tap. Problems can be prevented beforehand.

According to a third aspect of the present invention, in the heating device according to the first or second aspect, the flow sensor erroneous connection detecting means includes opening / closing information of the shutoff valve or the first and second shutoff valves, An erroneous connection is detected based on flow rate detection information of the hot water flow rate sensor and the hot water supply flow rate sensor. Therefore, based on the open / close information of the shut-off valve and the flow rate detection information of the hot water flow rate sensor and the hot water supply flow rate sensor corresponding thereto, it is possible to detect whether the hot water flow rate sensor and the hot water supply flow rate sensor are erroneously connected, and to connect to the bathtub. The problem that the supply amount of hot water or the supply state of hot water to the hot water tap cannot be detected can be prevented beforehand.

According to a fourth aspect of the present invention, in the heating device according to the first to third aspects, the flow rate sensor misconnection detecting means may open the shutoff valve or the first and second shutoff valves. Regardless, when the hot water flow rate sensor does not detect the flow rate and the hot water supply flow rate sensor detects the flow rate for a predetermined time, it is determined that the connection is incorrect. If the hot water supply flow rate sensor, rather than the hot water flow rate sensor, detects the flow rate when the shut-off valve is opened, it is suspected that the connection has been made incorrectly. In this manner, the presence or absence of an erroneous connection can be detected based on the open / close information of the shut-off valve and the flow rate detection information.

According to a fifth aspect of the present invention, in the heating device according to any one of the first to third aspects, the flow rate sensor misconnection detecting means may open the shutoff valve or the first and second shutoff valves. Regardless, the hot water flow rate sensor does not detect the flow rate, and the hot water supply flow rate sensor detects the flow rate, and thereafter, when the shutoff valve or the first and second shutoff valves are closed, the hot water supply flow rate sensor detects the flow rate. When the flow rate is no longer detected, it is determined that the connection is incorrect. When the shutoff valve was opened, the hot water supply flow sensor, not the hot water flow sensor, detected the flow rate, and then the hot water supply flow sensor stopped detecting the flow rate when the shutoff valve was closed. Is suspected. In this manner, the presence or absence of an erroneous connection can be detected based on the open / close information of the shut-off valve and the flow rate detection information.

According to a sixth aspect of the present invention, in the heating device according to any one of the first to fifth aspects, when the flow rate sensor erroneous connection detecting means detects erroneous connection, the shutoff valve or the first and second valves are connected. The control unit controls the opening of the shut-off valve to be prohibited. Therefore, when an erroneous connection of the flow sensor is detected, the opening of the shut-off valve is prohibited so that the hot-water operation cannot be performed, so that the shut-off valve is continuously opened without detecting the amount of hot water to the bathtub. Therefore, it is possible to prevent a situation in which hot water overflows from the bathtub.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a configuration diagram in which a heating device 100 according to one embodiment of the present invention is applied to an electric water heater.

After the water from the water supply source passes through a water stopcock 101 upstream of the heating device 100, the pressure is reduced by a pressure reducing valve 1.
The water supply pipe 2 and the bypass pipe 3 are branched downstream of the pressure reducing valve 1. The bypass pipe 3 is connected to a downstream hot water supply mixture ratio adjusting valve 46A, and is provided with a feed water temperature sensor 41 for detecting a feed water temperature.
A vacuum breaker 51 is provided for canceling the negative pressure when a negative pressure is generated in the pipe such as when water is cut off. The water supply pipe 2 communicates with a heating unit 31. The heating unit 31 includes a hot water storage tank 32, a lower heater 33, and an upper heater 34. The water in the hot water storage tank 32 is heated by the lower heater 33 and the upper heater 34 such that the detection temperatures of the tank lower temperature sensor 37 and the tank upper temperature sensor 38 become high (for example, 85 ° C.). Further, a drain valve 36 is provided below the hot water storage tank 32. Further, a safety valve 35 for releasing expansion water generated when the water in the hot water tank 32 is heated is provided at an upper portion of the hot water storage tank 32.

The hot water mixing ratio adjusting valve 46A driven by the stepping motor mixes the water from the bypass pipe 3 with the high-temperature water from the high-temperature hot-water pipe 4A downstream of the high-temperature hot-water pipe 4 so that the hot-water is supplied at a suitable temperature. 8A. Hot water supply pipe 8A is connected to a hot water tap (not shown). The hot water supply pipe 8A has a hot water temperature sensor 43A for detecting the hot water temperature and a hot water flow sensor 44 for detecting the amount of hot water supplied to the hot water supply pipe 8A. Further, the high-temperature hot water supply pipe 4 is provided with a high-temperature water temperature sensor 42 for detecting the temperature of the high-temperature hot water supplied from the heating unit 31.

The high-temperature hot water supply pipe 4 is further downstream of the high-temperature hot water supply pipe 5.
Through the hot water mixing ratio adjusting valve 46B. On the other hand, the bypass pipe 3 branches downstream of the vacuum breaker 51, and passes through the bypass pipe 7 through the hot water mixing ratio adjusting valve 4.
It leads to 6B.

The hot water mixing ratio adjusting valve 46B driven by the stepping motor mixes the water from the bypass pipe 7 and the high-temperature water from the high-temperature hot-water supply pipe 5 so that any one of high-temperature water, water, and hot water of the appropriate temperature is added. It is supplied to the beam supply pipe 9. The hot water supply pipe 9 has a hot water solenoid valve 21 for starting / stopping the hot water to the bathtub 62 (in this embodiment, the shutoff valve is described as an electromagnetic valve), and a hot water temperature for detecting the hot water temperature. A hot water temperature sensor 43B, a hot water flow sensor 45 for detecting the amount of hot water supplied to the hot water supply pipe 9, and check valves 52 and 53 are provided. The hot water supply pipe 9 further communicates with an adapter 61 attached to the wall surface of the bathtub 62.

Further, the heating device 100 includes a tank lower temperature sensor 37, a tank upper temperature sensor 38, a feed water temperature sensor 41, a hot water temperature sensor 42, a hot water temperature sensor 43A, a hot water flow sensor 44, a hot water temperature sensor 43B, and a hot water temperature sensor 43B. Based on a detection signal from the beam flow sensor 45 and the like and an instruction from the remote controller 71, the lower heater 3
3, a main body control unit 70 for controlling the upper heater 34, the hot water mixing ratio adjusting valve 46A, the hot water mixing ratio adjusting valve 46B, the hot water electromagnetic valve 21, and the like.

The remote controller 71 has a hot water supply temperature setting switch 85 for setting a set temperature Ts of hot water supplied from the hot water supply pipe 8A, and a hot water temperature setting switch 86 for setting a set temperature Tfs of hot water to be poured into the bathtub 62. Hot water amount setting switch 87 for setting the amount of hot water to be poured into bathtub 62, bathtub 6
A hot water switch 82 that is turned on when hot water is supplied to
A hot water hot water switch 83 that is turned on when hot water is supplied into the bathtub 62, a water hot water switch 84 that is turned on when water is supplied into the bathtub 62, a hot water supply set temperature Ts, a hot water set temperature Tfs, and the like. A display unit 81 for displaying operating information of the heating device in characters and a speaker 88 for notifying the operating information of the heating device by voice are provided. Further, the remote controller 71 and the main body control unit 70 are connected by a communication line 72 and mutually communicate operation instruction information and operation information.

FIG. 2 is a configuration diagram of another embodiment in which the heating device 100 according to one embodiment of the present invention is applied to an electric water heater. The difference from FIG. 1 is that instead of the hot water electromagnetic valve 21, a first electromagnetic valve 22 for starting / stopping the supply of high-temperature water to the high-temperature hot water supply pipe 5 (in the present embodiment, the shutoff valve is described as an electromagnetic valve. On the other hand, the bypass pipe 7 is provided with a second solenoid valve 23 for starting / stopping the supply of water, and the main body control unit 70A is different from the main body control unit 70 in FIG. It is the same as FIG. 1 except that the first solenoid valve 22, the second solenoid valve 23, etc. are controlled instead of the hot water solenoid valve 21.

FIG. 3 is an operation flow showing an embodiment in which the flow sensor erroneous connection detecting means according to one embodiment of the present invention is applied to the electric water heater shown in FIG. First, the remote control 7
It is confirmed whether or not the hot water switch 82 is turned on (step S1). When the hot water switch 82 is turned on, it is checked whether or not the flow rate Qq detected by the hot water supply flow sensor 44 is 0 liter / min (step S2). ). Flow rate Qq is 0 liter / m
In the case of in, that is, when it is determined that the hot water tap is not opened, the hot water electromagnetic valve 21 is opened as it is (step S4). If the flow rate Qq is not 0 liter / min, that is, if it is determined that the hot water tap is opened, the hot water use flag indicating hot water use is set to 1 (step S3), and the hot water solenoid valve 21 is opened. (Step S4).

Next, it is confirmed whether or not the hot water use flag is set to 1 (step S5). If the hot water use flag is not 1, that is, before the hot water beam solenoid valve 21 is opened, the hot water tap is opened. If it is determined that the flow rate has not been detected, it is checked whether the flow rate Qf detected by the hot water flow rate sensor 45 is 0 liter / min (step S6). Flow rate Qf is 0 liter / min
In the case of, it is confirmed whether or not the flow rate Qq detected by the hot water supply flow rate sensor 44 is 0 liter / min (step S7). Flow Q
When q is 0 liter / min, that is, when both the flow rate Qf and the flow rate Qq are 0 liter / min even though the hot water solenoid valve 21 is opened in step S4, it is determined that the water supply is shut off (step S4).
8) After the hot water solenoid valve 21 is closed, the hot water operation is locked out, the subsequent hot water operation is prohibited (step S9), and the contents of the error are displayed in characters on the display section 81 of the remote controller 71, and at the same time, Error contents of speaker 88
(Step S10).

If the flow rate Qq is not 0 liter / min in step S7 (= the flow rate is detected), that is, the flow rate Qf is 0 liter / min despite the fact that the hot water solenoid valve 21 is opened in step S4. When the flow rate Qq is not 0 liter / min at min (= when the flow rate is detected), it is suspected that the hot water supply flow rate sensor 44 and the hot water flow rate sensor 45 are erroneously connected. If this state continues, it is determined that the flow sensor is incorrectly connected. That is, if the 90-second timer has not started (step S13),
A 90-second timer is started (step S14), and 9
When the 0 second timer counts up (step S1
5) It is determined that the flow sensor has an erroneous connection error (step S16). If the 90-second timer has not counted up in step S15, the process proceeds to step S6 and the flow rate Q
Continue checking f and flow rate Qq.

If it is determined in step S16 that the flow rate sensor is incorrectly connected, the hot water operation is locked out after closing the hot water solenoid valve 21 and the subsequent hot water operation is prohibited (step S17). The content of the error is displayed in characters on the display unit 81 of the printer 71, and at the same time, the content of the error is notified by voice from the speaker 88 (step S1).
8). In this way, by prohibiting the hot water operation, the hot water solenoid valve 2 can be operated without detecting the hot water amount to the bathtub 62.
It is possible to prevent a situation in which hot water overflows from the bathtub 62 while the valve 1 is kept open.

If the flow rate Qf is not 0 liter / min in step S6 (= the flow rate is detected), it is considered that the hot water flow rate sensor 45 detects the flow rate by opening the hot water solenoid valve 21. Therefore, it can be determined that the flow sensor is not misconnected. In this case, it is checked whether or not the integrated water amount detected by the hot water flow rate sensor 45 has reached the hot water set amount set by the hot water amount setting switch 87 of the remote controller 71 (step S11). If so, the hot water electromagnetic valve 21 is closed (step S12), and the hot water switch is turned off (step S19).
The hot water operation is completed.

If the hot water use flag is 1 in step S5, that is, if the hot water supply flow sensor 44 detects the flow rate in step S2 with the hot water solenoid valve 21 closed, the flow sensor is incorrectly connected. It can be determined that it has not been done. Because, assuming that the hot water supply flow rate sensor 44 and the hot water flow rate sensor 45 are interchanged, in the state where the hot water supply electromagnetic valve 21 is closed, the hot water supply flow rate sensor that is erroneously connected and attached downstream of the hot water supply electromagnetic valve 21 is provided. This is because 44 does not detect the flow rate. In this case, step 1
The routine proceeds to 1 to perform a normal hot water operation.

When the flow sensor erroneous connection detecting means shown in FIG. 3 is applied to the electric water heater shown in FIG. 2, in steps S4 and S12 in FIG. 3, the hot water solenoid valve 21 is connected to the first solenoid valve 22 and the second solenoid valve. What is necessary is just to replace with the solenoid valve 23.

FIG. 4 is an operation flow showing another embodiment in which the flow sensor erroneous connection detecting means according to one embodiment of the present invention is applied to the electric water heater shown in FIG. The difference from FIG. 3 is that when the 90-second timer has not counted up in step S15, the hot water solenoid valve 21 is once closed (step S20), and after 5 seconds (step S21), the step S2 is performed.
This is the point that has shifted to. That is, until the 90 second timer counts up, the opening and closing of the hot water electromagnetic valve 21 is repeated (steps S4 and S20), and the flow rate Qf detected by the hot water flow rate sensor 45 and the flow rate detected by the hot water supply flow rate sensor 44 at that time. The check for incorrect connection of the flow sensor is repeated based on Qq.

When the hot water electromagnetic valve 21 is opened, the hot water supply flow rate sensor 44 detects the flow rate instead of the hot water flow rate sensor 45. Thereafter, when the hot water flow electromagnetic valve 21 is closed, the hot water supply flow rate sensor 44 detects the flow rate. Is no longer detected,
The connection of both sensors is suspected. Step S4, S20
By repeatedly opening and closing the hot water electromagnetic valve 21 and monitoring the flow rates of both sensors, it is possible to more reliably detect an erroneous connection of the flow rate sensors.

If the flow sensor erroneous connection detecting means shown in FIG. 4 is applied to the electric water heater shown in FIG. 2, the steps S4, S12 and S20 in FIG.
May be replaced with the first solenoid valve 22 and the second solenoid valve 23.

[Brief description of the drawings]

FIG. 1 shows a heating device 100 according to an embodiment of the present invention.
Diagram of the application of the water heater to an electric water heater

FIG. 2 shows a heating device 100 according to an embodiment of the present invention.
Of another embodiment in which the present invention is applied to an electric water heater

FIG. 3 is an operation flow showing an example in which the flow sensor erroneous connection detection means according to one embodiment of the present invention is applied to the electric water heater shown in FIG.

FIG. 4 is an operation flow showing another embodiment in which the flow sensor erroneous connection detecting means according to one embodiment of the present invention is applied to the electric water heater shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pressure reducing valve 2 ... Water supply pipe 3 ... Bypass pipe 4 ... Hot water supply pipe 4A ... Hot water supply pipe 5 ... Hot water supply pipe 7 ... Bypass pipe 8A ... Hot water supply pipe 9 ... Hot water supply pipe 21 ... Hot water electromagnetic valve 22 ... First solenoid valve 23 ... Second solenoid valve 31 ... Heating part 32 ... Hot water storage tank 33 ... Lower heater 34 ... Upper heater 35 ... Safety valve 36 ... Drain valve 37 ... Tank lower temperature sensor 38 ... Tank upper temperature sensor 41 ... Water supply temperature sensor 42 hot water temperature sensor 43A hot water supply temperature sensor 43B hot water temperature sensor 44 hot water supply flow rate sensor 45 hot water flow rate sensor 46A hot water mixing ratio control valve 46B hot water mixing ratio adjustment valve 51 vacuum suction breaker 52 reverse Stop valve 53 ... Check valve 61 ... Adapter 62 ... Bathtub 70 ... Body control unit 70A ... Body control unit 71 ... Remote control 72 Communication line 81 Display unit 82 Hot water switch 83 Hot water switch 84 Hot water switch 85 Hot water temperature setting switch 86 Hot water temperature setting switch 87 Hot water amount setting switch 88 Speaker 100 Heating device 101 … Water stopcock

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3L024 CC09 CC22 DD03 DD13 DD16 DD19 DD23 EE02 EE12 FF15 FF18 GG03 GG04 GG05 GG07 GG22 GG25 GG38 HH03 HH13 HH51 HH58

Claims (6)

[Claims] 1. A heating section for heating water, a hot water supply pipe connected to a bath tub to supply hot water from the heating section, and a hot water supply pipe provided in the hot water supply pipe to supply / stop hot water to the bath tub. A shutoff valve for, a hot water flow rate sensor provided in the hot water supply pipe for detecting the flow rate of hot water supplied to the bathtub,
A hot-water supply pipe connected to the hot-water tap to supply hot water from the heating unit, a hot-water supply flow sensor provided in the hot-water supply pipe for detecting a flow rate of hot water supplied to the hot-water tap, and opening and closing of the shut-off valve And a control unit for controlling the hot water flow rate sensor and a hot water supply flow rate sensor, the flow rate sensor erroneous connection detection means for detecting erroneous connection between the hot water flow rate sensor and the hot water supply flow rate sensor is provided in the control unit. apparatus. 2. A heating section for heating water, a hot-water supply pipe connected to a bathtub, a high-temperature hot-water supply pipe for supplying high-temperature water supplied from the heating section to the hot-water supply pipe, and the heating section. A hot water supply pipe, a first shut-off valve provided on the high-temperature hot water supply pipe for supplying / stopping the high-temperature water, and a bypass pipe provided on the bypass pipe. A second shutoff valve for supplying / stopping water from the pipe, a hot water flow sensor for detecting the flow rate of hot water supplied to the bathtub provided in the hot water supply pipe, and a hot water tap. A hot water supply pipe for supplying high-temperature water from the heating unit, a hot water supply flow sensor provided in the hot water supply pipe for detecting a flow rate of hot water supplied to a hot water tap, and the first and second shutoffs A heating device equipped with a control unit that controls the opening and closing of the valve There are, heating apparatus, characterized in that the flow sensor misconnection detecting means for detecting an erroneous connection of the hot beam flow sensor and the hot water supply flow sensor provided in the control unit. 3. The flow rate sensor erroneous connection detecting means includes: opening / closing information of the shutoff valve or the first and second shutoff valves;
3. The heating device according to claim 1, wherein an erroneous connection is detected based on flow rate detection information of the hot water flow rate sensor and the hot water supply flow rate sensor. 4. 4. The flow rate sensor erroneous connection detection means, wherein the hot water flow rate sensor does not detect a flow rate despite opening the shutoff valve or the first and second shutoff valves,
4. The heating device according to claim 1, wherein if the state in which the hot water supply flow rate sensor detects the flow rate continues for a predetermined time, it is determined that the connection is incorrect. 5. The flow rate sensor erroneous connection detection means, wherein the hot water flow rate sensor does not detect a flow rate despite opening the shutoff valve or the first and second shutoff valves,
And the hot water supply flow rate sensor detects the flow rate,
4. The connection according to claim 1, wherein the hot water supply flow rate sensor does not detect the flow rate when the shutoff valve or the first and second shutoff valves are closed, and the connection is determined to be erroneous. 5. Heating equipment. 6. The control section controls the shut-off valve or the first and second shut-off valves so as to prohibit the opening of the shut-off valve or the first and second shut-off valves when the flow sensor erroneous connection detecting means detects an erroneous connection. The heating device according to claim 1, wherein: