JP3245898B2 - Water heater control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to relates to a control apparatus of the hot water supply unit.

[0002]

2. Description of the Related Art Conventionally, for example, in a water heater with a bath hot water supply function, automatic hot water supply to a bathtub and reheating are performed as a trial operation after installation of the equipment to check whether the equipment operates normally. At this time, operate the automatic hot water supply switch, bath temperature setting knob, and automatic hot water supply setting knob for automatic hot water supply, and operate the additional heating switch and bath temperature setting knob for additional heating, and program according to the manual that describes the contents of test run. Was digested.

[0003]

However, in the conventional trial operation method, various complicated operations are repeated in accordance with a manual, and the time required for the trial operation is long, resulting in poor efficiency.

[0004] The present invention is intended to solve the above problems, by a special control only during commissioning, an object on efficiency improvement of commissioning work.

[0005]

Therefore, in order to achieve the above object, the present invention provides a test run mode for performing special control during a test run.

[0006]

With the above means, the control device of the present invention can control the functions of the appliances in the order of the program in the function control mode of the appliances at the time of the trial operation, and can improve the efficiency of the trial operation.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a water heater employing a control device according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a water heater according to an embodiment of the present invention.
The automatic hot water supply and the reheating in normal operation will be described. When the automatic hot water supply switch 31 is pressed, water is supplied from the water inlet, and the water amount sensor 1, which is a water amount detection device,
The water passes through the hot water supply thermistor 2 and is absorbed by the heat exchanger 3 for hot water supply to become hot water. After the hot water passes through the hot water supply / discharge thermistor 4, the water quantity becomes constant with the water quantity proportional valve 5.
The gas proportional valve 16 is driven and adjusted so that the temperature detected by the above becomes the temperature set by the bath temperature setting knob 29 which is the bath temperature setting means. Then, the hot water that has passed through the automatic hot water supply electromagnetic valve 6 is sent from the check valve 7, the bath water flow switch 8, the bath thermistor 9, the heat exchanger 10 for the bath, and the hot water supply to the bathtub 12 through the bath adapter 11 through the bath adapter 11. And reach. If the two-way valve 13 opens during the sequence (“open”, “closed”
There are two states), and the bathtub 1
Run out to 2. The hot water is supplied to just the set amount set by the automatic hot water supply amount setting knob 30 as the automatic hot water supply amount setting means, and the operation of the automatic hot water supply ends. Also,
The gas is supplied from the upstream of the hot water supply side and the bath side to the original solenoid valve 14
15, reaching the proportional valves 16 and 17 and the burners 18 and 19, which are the heat quantity adjusting devices. Blowers 20 and 21 for combustion are provided below the heat exchangers 3 and 10, respectively.

When the operation of the automatic hot water supply is completed and the reheating switch 32 is pressed, the two-way valve 13 is fixed at "open".
The circulation pump 22 starts. The hot water sucked up from the bathtub 12 through the reheating port is used for the bath water flow switch 8,
It flows through the bath thermistor 9 and the bath heat exchanger 10, further absorbs the heat, and returns to the bathtub 12 through the additional heating port. Then, when the temperature of the hot water in the bathtub 12 detected by the bath thermistor 9 becomes 2 ° C. of the temperature set by the bath temperature setting knob 29, the combustion is stopped, and the trial run of the reheating is completed. At this time, the check valve 7 does not flow toward the automatic hot water supply electromagnetic valve 6.

The above is the normal operation. The test operation mode will be described below. When the test operation mode is performed, the test operation connector 24 on the electrical unit 23 is operated.
Pin (Initially in normal operation connector 25)
Insert 24a. Then, the same operation as the normal automatic hot water supply is started. However, the difference here is, first of all, that the amount of hot water supplied to the bathtub 12 is even smaller than the minimum of the normal set hot water supply amount. As shown in FIG. 2, the amount of hot water is almost exactly above the bath adapter 11. This is the minimum operable water amount of the reheating to be performed later. If this water amount is water amount B and the minimum water amount of the hot water supply amount setting means is water amount A, that is, the workability is improved by the difference (water amount A−water amount B) ( Shortening of hot water supply time and reduction of water and gas consumption) can be obtained.
Another difference is that the hot water supply temperature is set to, for example, plus 2 ° C. of the incoming water temperature, and a reduction in the set temperature can achieve a reduction in gas consumption. When the test operation of the automatic hot water supply is completed in this way, the test operation of the reheating operation is automatically started according to the test operation program. The operation of the reheating operation itself is not different from the normal operation, but the difference here is that the rising temperature of the reheating is fixed to, for example, plus 2 ° C. without operating the bath temperature setting means. Circulation pump 22
First, the temperature of the hot water in the bathtub 12 is detected by the bath thermistor 9 and stored. Based on the data, when the temperature reaches 2 ° C, the combustion is stopped, and the trial run for reheating is completed.

When the two test runs are completed, the test run mode of the device is ended, and "test run completed" is displayed on the display unit 28. In addition, a display urging "Please return the pins to the normal operation mode" may be added so as to return the test operation mode to the original normal operation mode. FIG. 3 shows a simple flowchart of the above description. (I) shows the contents of the automatic hot water supply, and (II) shows the contents of each reheating program.

In the first embodiment, the means for inserting the pin 24a into the connector 24 for test operation on the electrical unit 23 is used to perform the test operation mode. However, in this method, it is necessary to open the front cover (not shown) of the device, and it is difficult to see the state of the test operation at the same time (since the bathtub 12 and the device are separated). Therefore a switch for new trial on bath controller 27 (not shown), as a test operation mode by pressing the switch
Is also good.

In addition, the existing switch may be pressed multiple times in the hidden mode so that only the installer can operate it easily and ordinary users do not know how to operate . For example, the automatic hot water supply switch 31 on the bath controller 27
And pushing three of the reheating switch 32 and the operation switch 33 at the same time. Then, the display of "end of test run" at the end of the test run mode is released by pressing any switch thereafter. FIG. 4 shows a simple circuit configuration diagram of this embodiment.

[0014] According to an embodiment of the following, an automatic hot water supply and reheating commissioning pins 24a of commissioning a switch or can be performed by a simple operation of multiple key press such as the existing switches, and efficiency of commissioning work Get better. In addition, when the test operation program is diversified, it is possible to eliminate the operation error accompanying the complicated test operation, and it is possible to expect the accurate operation in addition to the improvement of the efficiency.

[0015]

As is apparent from the above description, the control device according to the first aspect of the present invention is useful for improving the work efficiency of the test operation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a control device for a water heater according to the present invention.

Fig. 2 Water level diagram

FIG. 3 is the same flowchart.

FIG. 4 is an electric circuit diagram of another embodiment of the present invention.

[Explanation of symbols]

 (I), (II) Trial run program 23 Electrical unit 24 Trial run connector (Trial run exclusive switch) 24a Pin (Trial run exclusive switch) 31 Automatic hot water supply switch (Existing switch) 32 Reheating switch (Existing switch) 33 Operation switch ( Existing switch)

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsushi Iwamoto 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References Real Open Sho 63-92153 (JP, U) (58) Survey Field (Int. Cl. ⁷ , DB name) F24H 1/00 602

Claims (1)

(57) [Claims] 1. A water heater with a hot water supply function and a reheating function
To switch between normal operation mode and test operation mode
Unit and a trial run mode by the electrical unit
Is switched to, the hot water supply to the bathtub is the normal set hot water supply
Is set to a value even less than the minimum of
During reheating in operation mode, the temperature rise due to reheating
Water heater controller with temperature set to the minimum temperature at which rise can be confirmed .