JPS5966643A - Residual water level indicator of storage type water heater - Google Patents

Abstract

PURPOSE:To provide the titled indicator adapted to verify the levels of hot water and low temperature water when the indicator is preset for an high and low temperatures respectively, by allowing the water level indicator to vary its preset level depending on a preset hot water temperature. CONSTITUTION:The temperatures of thermistors 9, 10 and 11 are converted into respective voltages, sequentially selected through an analog multiplexer 21 and undergone an A/D conversion 22 through a comparison circuit 24. Up-to-dated temperature data of thermistors 9, 10 and 11 is always stored in the memory of micro-computer 15. The digital value ADREF of preset temperature and the digital values AD1, AD2 and AD3 of themistors are compared, and if the values AD1-AD3 are lower than the ADREF, a burner 5 is continued to operate until they become equal for thereby obtaining a hot water of preset temperature. On the other hand, a micro-computer 15 computes a temperature slightly lower than the digital value ADREF of said preset temperature for providing the digital value ADHAM. Then, the digital value ADHAM is individually compared and if the digital value ADHAM is found to be in excess, the LED of residual water level indicator 16 is lighted.

Description

[Detailed description of the invention] It is something.

Conventional configuration and problems Generally, in this type of remaining hot water indicator, multiple temperature detection elements such as thermistors are installed at different positions in the height direction of the hot water storage tank. The amount of hot water inside was detected and displayed on a lamp, meter, etc., and the determination level used at that time was a value close to 40 degrees Celsius. However, in terms of -power, it is a single hot water storage type V!
j, 1. The temperature of the water boiled by the water dispenser has been changed to 11 by changing the volume and switch (generally 45℃ to 85℃). In addition, hot water storage type water heaters are usually used with a high temperature setting in the winter and a low temperature setting in the summer.In this way, the user can switch the hot water temperature setting depending on the situation. Of course, one user wants hot water at that temperature, and it is obvious that the remaining hot water indicator used for this can only display temperatures around 40°C, regardless of the general fixed hot water temperature. It is inconvenient.

Purpose of invention The present invention aims to solve the above-mentioned conventional drawbacks.

The determination level of the remaining hot water indicator is varied according to the hot water temperature setting of the device, and when the high temperature setting is set, hot water is determined, and when the low temperature setting is 0, low temperature 0 hot water is determined.

The purpose is to carry out the following.

Structure of the invention ・ ″″ □ 111'1 Achievement of the above object (9th) Basic structure of the present invention: The structure consists of a plurality of sensors installed at different positions in the height direction of the hot water storage tank, 1. Main control means such as a microcomputer for taking in the signals of these temperature detecting bodies and displaying them on lamps, meters, etc.;
2. The main control means detects the set water temperature set by the user.2. ．． According to this, a level for displaying the remaining hot water is set, and this level is compared with the detection signal of the temperature sensor to display the remaining hot water corresponding to the level. - 1. Explanation □ Hereinafter, one embodiment of the present invention will be described based on the drawings. FIG. 1 shows a side cross-sectional view of a hot water boiler according to an embodiment of the present invention, in which (1) is a hot water storage tank, (2) is a hot water supply port provided at the top of the hot water storage tank (1), and (3) is a hot water supply port provided at the top of the hot water storage tank (1). is a water supply port provided at the bottom of the hot water storage tank (1), and (4) is a heat exchanger located at the bottom of the hot water storage tank (1) and penetrating both ends of the hot water storage tank (1). , this heat exchange -1 (4
-m of ) is an open end, and the open end has a heating bath means, a burner (5), and the other end: is partially opened and the opening is heated. The chimney (6) that discharges the combustion exhaust gas from the burner (burner extension) and the chimney top (A) are connected. In addition, a baffle plate (8) is provided inside the heat exchanger (4), which transfers the combustion heat from the combustion of the burner (6) from the outer periphery of the heat exchanger (4) to the hot water storage tank (1). , to warm the water inside.

(9) + (10) , (1Q #i) This is a thermistor located above the heat exchanger (4) and installed at a different height from the hot water tank (1). Thermistor (9), 1 (,1C)) 1(,i i )l
/il:Iyo: The water temperature of the hot water storage tank (1) corresponding to that height position can be detected.

FIG. 2 is a block diagram showing the control configuration of this hot water pump. , (12) is a remote control unit (remote controller), which is connected to the main body side control circuit (14) by a data signal line (13).
) is connected. The remote control unit (12) Ic is equipped with a microcomputer (15) as a main control means, and controls the main body of the device via a data signal line (13). , (16) is 3 pieces of glue,
The display device (17) constituted by the ED is directly connected to the main control means (15) through a hot water temperature setting switch. (1β) is a shift register circuit, which stores the serial data sent from the remote processing unit (12) and outputs it in parallel; (19) is a latch circuit; )'s parallel output. The output of the latch circuit (19) is connected to a driver circuit (2o) such as a relay, and an Ω analog and log multiplexer (21) for selecting and receiving multiple analog signals.
), the A/D conversion circuit, and the path (22) are connected.

A burner control means (23) such as a relay is connected to the driver circuit (20) to control and roll the burner (5). ,l,.

Thermistors (9), , (1o), (11) are input to the analog cortiplexer circuit (2, 1, ,), and the output from the Otsuchi circuit (22), data? , the selected item is output.1. Comparison circuit (tsu 4)
) is one of the input signals. .

The A/Di conversion circuit (22) has latch circuits J (19) to 8.
Digital data on the order of bits is given, and a reference voltage at a voltage level corresponding to the digital data becomes the other input signal of the comparator circuit (24).

The comparison circuit (24) compares the two human forces and transmits the judgment result to the microcomputer (15).

Next, the operation of the ninth embodiment will be explained. ,.

First, the user is asked to set the water temperature using the water temperature setting switch (17), .
5) checks this, calculates and stores a digital value 4D Rpy corresponding to the temperature.

On the other hand, the temperatures of the circuits (9), (10), and (11) are quickly converted and
) are selected sequentially through the comparator circuit (24).
After being converted into D, it is constantly monitored and monitored by the microcomputer (15) via the data signal line (13), and these operations are processed at a fixed speed and are now stored in the memory of the microcomputer (15). There is always a thermistor (9) inside the device.
The latest nine temperature data of , (10), and (11) are stored. This little bit of warmth y':=4 is the digital value ADt.

AD2. AD3, therefore, the set temperature digital value AD HEF and thermistor digital value ADD,
If AD1 to AD3 are low compared to D2゜AD3,
The burners (5) are operated until they reach AD HEF to produce hot water at the set temperature. In this path, first, a burner drive signal is sent from the micro combi coater (15) to the shift register circuit (18) through the data signal line (13). This is then latched by the latch circuit (19).

ζ et al. driver circuit (2o), burner control means (23
), the operation of the burner (5) is started at step 1-.

On the other hand, the microcomputer (15) uses the above-mentioned set temperature digital value ADR as the determination level for the remaining hot water indicator.
A temperature slightly lower than RF (appropriately 3 to 5 degrees) is calculated to calculate the temperature value ADH.

This operation can be performed by simple subtraction of digital values.

Then, compare this ADHmuN individually and -AD)
If it exceeds IAN, the LED of the remaining hot water indicator (16) lights up. Here - L E D to the thermistor (11)
(16a) to -thermis 7 (10) L E D (1
6b), L E D (1ec) to the thermistor (9)
If the remaining hot water amount is made to correspond to each of the above, three levels of remaining hot water amount can be displayed, and the displayed hot water temperature will be close to the hot water temperature set by the user.

Effects of the Invention As described above, according to the present invention, the remaining hot water indicator automatically changes according to the boiling temperature setting of the device, so that the amount of hot water at the temperature desired by the user is always displayed. It's ox.
If you choose to display a temperature that is slightly lower than the set boiling temperature, the remaining water indicator will operate shortly before the boiling point when the equipment is running, so you can know that boiling is nearing completion. Furthermore, when the equipment is stopped, the user can find out the main water temperature by changing the hot water temperature setting means and searching for the operating position of the remaining water indicator. It has the effect of being able to obtain information on both the amount of hot water and the temperature of the hot water.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a hot water boiler according to an embodiment of the present invention, and FIG. 2 is a control block diagram of the hot water boiler. 1... Hot water storage tank, 5... Burner (heating means), 9.10', 11... Thermistor,
16... Remaining hot water indicator, 17... Hot water temperature setting switch (hot water temperature setting means). Name of agent: Patent attorney Toshio Nakao and 1 other person-2
(Figure 1

Claims (1)

[Claims] The above-mentioned hot water storage tank comprises a hot water storage tank and a heating means for heating water in the hot water storage tank, and the temperature of the heated water produced by the heating means can be arbitrarily varied by a hot water temperature setting means such as a switch or a volume. Several PN temperature detectors are installed at different positions in the height direction of the hot water storage tank, the temperature is detected by these temperature detectors, the remaining hot water is displayed using a meter, an LED, etc., and the judgment level of this remaining hot water display is determined. A remaining hot water indicator for a hot water storage type water heater, characterized in that the remaining hot water indicator is variable in conjunction with the set value by the hot water temperature setting means.