JPS59208348A - Controlling device of water heater - Google Patents

Abstract

PURPOSE:To make it convenient to use a water heater, by preventing danger caused by extremely hot water and by indicating the cause why the temperature in water is lower than a desired temperature, by determining the controlled rate by the deviation of an output temperature from a target temperature by PID operation, and by displaying that the limit of controlled capacity is exceeded by detecting the saturation of an integral action. CONSTITUTION:A deviated output on one arm of a bridge circuit 21 containing a temperature setter 14 and a thermistor 12 on the circuit is via a buffer amp. 22, and another deviated output is driectly, put into a proportional and integral circuit 23 and a differential circuit 24, respectively. When hot-water is put out exceeding the limit of controlled capacity, the condition of imaginary shortening is lost in an operational amplifier 231, and deviation is caused on the voltage which is put into a differential amplifier 28 or 29. Then the output voltage from the differential amplifiers 28 and 29 becomes higher than the reference voltage being set by comparators 30 and 31, and a photo diode 32 or 33 in either one of the comparators 30 or 31, in which an output level becomes higher, is actuated to turn ON a light.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention is directed to water heater control DI! Regarding equipment, especially hot water f
This relates to a technology for notifying the Ministry of Use when hot water is drawn out beyond the limit that can maintain the KV temperature control.

・(Prior art and its problems) 1717 (As in 1) In this type of water heater control device, a predetermined control amount is determined from the deviation of the outlet temperature and the target temperature by PrD calculation, and the burner is The combustion state of the hot water is controlled by C according to the discharged hot water m, and the temperature of the point a is maintained at the target temperature, so that even if the inflow water m fluctuates, the discharged hot water IiR degree is stable.

However, in this type of control system, due to the performance of the heat exchanger and the combustion angle supply system (iii), it is difficult to keep the outlet temperature under control. control j
The jE force has a constant TJ limit 74, but the range of this control ability varies depending on the temperature of the inflow water.

Therefore, the following problems were pointed out. Suna 1, low inflow water level 1, constant f: n'l [σ or low 1 hair i
If the inflow water quality is high, < 1? J, summer, etc.)'1
．． At the very least, the humidity of the hot water is at the set temperature J, the sushi height is less than 1, and the desired amount of fried mud is less than 1. Also, Ikuo! ;
In the middle of J8, where the desired hot water temperature is reduced by 1 in S' dust state, (inflow water decreases by 1 and is below the control capability range, Ilf,!
If you delay it, 2-3 will be overturned and the desired %'+ (Sho J, is it high?
I end up getting beaten up. On the 6th of this month (, shi, hot water may be poured out, (, 1 tJ, le danger). If the amount of inflow water increases and reaches the upper limit of the 1ll14iai! capacity range, the hot water quality will decrease.
Desired: The temperature is lower than the temperature.
4'L' (L/51).
As a counterpoint to this, if the amount of hot water 1 degree and the set temperature 1 do not match, it will be detected 1). Any quality mismatches (that occur when changes are made) will also be displayed, and the user will be notified that something is being done that is likely to exceed the control capability range. Evening for the purpose of Y)
Tashinote Atsu fko.

(Purpose of the invention) It'11 (Wholesale 1) Is it easy to get out of the way beyond the limit? Line 41, δ1, this force, 4'j can be displayed to prevent the danger of burns due to heat and temperature. If you want to prevent 11, the desired temperature J, sushi is low clear ^ turtle? Easy? 1q and 40
The advantage of this is to make the user aware of the reasons why it is difficult to use, and to make it easy to use.

(1.1.I-made movable bed of the invention) In order to achieve this light, 11 products with a predetermined structure based on the deviation between the hot water outlet temperature of the heat exchanger and the target humidity. is determined by proportional, integral, and differential operations. The feature is that a display means is provided to perform the display operation.

This (depending on fli configuration) controls the hot water output state of the easy boiler λ
11 Only when the ability range is exceeded, the user [ζ*Fi]
Since the user can avoid the risk of fire due to heat and temperature, the user can also set the desired temperature to It is possible to create an easy-to-use A-tlli device that is easy to use and easy to use.

(Description of Embodiments) Figure 1 shows the basic configuration of a hot water pot with control Ri according to the present invention. In the same figure, 2 units of heat exchanger 1 are installed on the water inlet side of heat exchanger 1.
ct, j, the outlet of the heat exchanger 1 [= 1 side → Pumisk 3 force \ is installed (]. Then, the scum f of the burner 4
jjj 'Ffj' 1 child path (here, the cabana 5 that adjusts the waste pressure, the supply waste A-n, 4), the solenoid half flow and O' that control 11, and the valve opening according to the current η. The variable control valve 7 has been closed for months. This burner 4 is tested with 6 fires and 7 times by the igniter 8, and the combustion state after firing is detected by the flame detector 9. 'If one person makes five mistakes, a buzzer 10 will sound an alarm. 21: A fan morph 11 is installed above the heat exchanger 1, and the operation of this fan morph 11 is checked by means of a fan switch 12.

Each of the following input/outputs (substitutes are controlled by a control circuit 13.1. This control circuit 13
Detection 1) The difference in width between the outlet water humidity of the hot 1φ vessel 1 and the target water temperature (set by the record setting device 14) 38
Outputs the local mark difference detection means and the product temperature (1d
The difference detection means (deviation No. 5 is input), and the input (L
, -'C proportional/integral/differential movement ('l- to i lie 1 u 1
jji p:+ means and 92! to τ burner/1 according to the output of this calculation means. i i'l supply supply charge 1::
! i iii system (considering the basic operation of the wholesale means as a basic operation, and further describing the proportional/integral operation of the lung means), and a saturation detection means that can detect the detection (combined with a display means that responds to No. 3 and displays the C display operation; °1
There is.

FIG. 2 is a basic configuration example of the control circuit 13, and mainly shows the parts related to the present invention. In the above-mentioned Takimaro setting device 1/lJ'3J:
and includes the above-mentioned I nermistor 12 on one side. One deviation output of this bridge circuit 21 is connected to the Balanoa amplifier 22.The other deviation output 1. The outputs of the proportional integral circuit 23 and the differential circuit 23 are directly input to the proportional integral circuit 23 and the differential circuit 24, respectively.
is given to the jt driving circuit 26 via the ll arithmetic circuit 25,
This valve 1% i3 operating circuit 26 controls the energization of the driving 21 isle 7a of the Tokiichi+++a valve 7.

The proportional integral circuit 23 J) and the differential circuit 24 are
-Ki oki f, 阜means -C perform the action i1, ζ, ratio i)! The first branch circuit 23 includes an operational amplifier 231. resistance R4,
R2d3 and capacitor C1) 111 is formed,
j, the differentiating circuit 24 is a run-sieve amplifier 241 . capacitor 0
2. Consists of resistors R3 and R4e.

] The basic operation of this control circuit 13 will be briefly explained in the A/4 configuration.

When the faucet is turned on and the flow of water in the τ heat exchanger 1 is detected by the flow switch 2, this is input to the control 311 circuit 13 as a start signal. The control circuit 131 starts the fan motor 11, and when it is detected by the wind pressure switch 12 that the fan motor 11 has reached a predetermined rotation speed, the -C solenoid valve 6 is turned on and the C1 control valve 7 is turned on. While setting the valve opening degree to an appropriate value, an attempt is made to ignite the burner 4 using the igniter 8. As a result, burner 4 is ignited normally and combustion takes place for a while.

Due to this combustion, when the hot water from the heat exchanger 1 is turned over toward the set temperature, the change in heat level is caused by the bridge T (). When the ratio J'L is 1 series, the integral circuit 23 and the differential circuit 2/If are not powered.The proportional integral circuit 23 and the differential circuit 24 work together to calculate and output the ear control as appropriate. , this control amount is given to the valve and drive circuit 2G via the addition ()[i,] path 25.As a result, the ↑drive circuit 261+
, the above-mentioned P, i control suspension control vehicle I-valve suction current is applied to the drive 2 l-oil 7a, and the valve opening degree of the control valve 7 is adjusted in a direction to avoid increasing the combustion amount.

As the hot water temperature approaches the set temperature, the temperature difference between A and A becomes smaller.
/! The flr control m, which is used for calculation, becomes the one listed in the column, and the valve tone η11mb of il; , Drive =] to Ile 7a! Current flowing current iJ: There is a constant roar, and as a result, the amount of combustion is constant. The difference circuit 2 corresponds to the sudden change in the hot water bath
・1 is activated, and the hot spring temperature is set f: ia degree (
This will be settled in the opposite direction. 1 The operation described above is controlled by the temperature within the range of 11:
14ff+' control operation. Here, the n-fusbe- is within the control i button ability range, which means that the
According to the detective circuit 2J), the state τ in which a person's deviation is a symptom and a predetermined output value is obtained is 1 iji i',
'+amplifier 2311. J: -('Q' scenario shi F-
This means that the strips A'1 of 1 to 1) are formed. If hot water is dispensed beyond the control capacity range, the upper limit is exceeded and the output is set. The outlet temperature of the hot water becomes 6 degrees higher than the set temperature, but under these conditions, the outlet value of the amplifier 2331 significantly exceeds the specified outlet point. , I can't fix this and end up with 4f. 4, 5, the proportional/integral circuit 23 satisfies its proportional/integral operation.As a result, the arithmetic amplifier 231 becomes imaginary short
'1 collapses, but the direction in which it collapses is in the positive direction J, or in the positive direction J, or in the direction A1. This can also be said about kl, ll(!9 circuit 2/'l, but in this differential circuit X62/I, it is in a normal control state and may temporarily become saturated, (;l Ni)'?l'Here, I'm going to make a change.

Therefore, in the control device according to the present invention, the deviation (
, i to differential amplifiers 28 and 29 via 1'1 buffers 26 and 27, and the outputs of the differential amplifiers 28 and 29 are subjected to level discrimination by comparators 30 and 31C, respectively, and the outputs of comparators 30 and 31 are Light up each of the luminescent ties 32 and 33 out of the way! lI? I made it so that

Since the configuration was messed up like this, performance 15 Jf9 width instrument 231
3117) Output 1ift.
LtOteary and therefore neither light emitting diode 32, 33 is driven point-to-point. If hot water is dispensed beyond the control capacity range described above (this is the case when the performance amplifier 23
1's output power It exceeds the predetermined value and saturates,
Imaginary show 1 of performance n amplifier 231 ~ article 1'1
collapses. In the direction of collapse, J is the differential amplifier 28.
5J: Check if there is a deviation in the input voltage to the voltage regulator 29. For example, when the output voltage of the buffer amplifier 2G is greater than the output voltage of the buffer amplifier 27, the potential difference is multiplied by a differential amplifier 29.

2) (The output voltage of the amplifier 29 is determined by the amplifier 3)
When the lightning voltage increases, the output of the comparator 31 becomes high level, and the light emitting quad Δ-33 is driven to light up. J, on the contrary, buffer amplifier 2
When the output voltage of 7 becomes larger than the output voltage of buffer amplifier 2G, light-emitting ties 'A-1 to 32 are similarly driven to light up via differential amplifier 28 and comparator 30.

In this manner, the control system according to the present invention can appropriately notify the user when hot water continues to be discharged (exceeding the capacity limit).

[Brief explanation of drawings]

Fig. 1 shows a basic 4M diagram of a water heater with a control device according to the present invention (11), and Fig. 2 shows an actual example of the above-mentioned embodiment device. (This shows U 1.t
1 is a schematic circuit diagram. 1・・・・・・・・・－・・・・・・Heat exchanger 3・・・・・・
・・・・・・・・・ζThermometer detector/1・・・・・・・
・・・・・・Bar゛】-7・・・・・・・・・・・・
Control ii1! Valve 13... Control circuit 1 ll... Temperature setting device 21...
......Bridge circuit 23...
...Proportional-integral circuit 24...Differential circuit 7a...Valve drive coil 28
．． 29...Differential amplifier 30.31...Comparator: 32.33...Light emitting diode Special 8'F Applicant ■Deniso Noishi (・3, ``Amendment 7'') (Spontaneous>58.1-
2'-do+11wa Year 几 To the Commissioner of the Japanese Patent Office 1, Matter 1'1 Indication 1982 [-Special 7. RF Application No. 82111 Bow 2, Name of Invention) Easy boiler control device $, Supplementary 'iJ->18 Koku Incident Which relationship 1s + ll' + Applicant 11- Place/Ra 61G Kyoto City I, 4 Kyo Ward Hana [N Tsuchidocho 10 Mountains Contact: Heavy Industries; 1 Technology Liaison Office 03 (436) 711i4
4. List of amendments (1) Specification 71 ('l!j K'l Claims and detailed explanation of the invention) )1
nri correction riru. 12) 1 Proportional/Integral on page 4, line 18 of the specification
``Integral'' with sleeve 1■-zuru. ), '2) 1 circuit 24 in the 8th row of the 9th page is activated,
”)-1 path 24, proportional integral circuit 23 and 7J\ operate, 1
Cover the correction. ,・j) 41 exceeds 1 in the 1st line of the 10th page. (1) Output a signal between the hot water temperature of the heat exchanger and the target water level (M l deviation detection means and this reservoir). Calculating means that takes as input the Wakizashi signal of 1 degree deviation detection and performs the operation of °C proportional, phase component, and differential, and fuel supply to the C-hull according to the output of this calculating means. +5 to the control device for the hot water boiler, which is equipped with a fuel control means for controlling the amount of fuel;
saturation detection means for detecting that the operation of the first stage of the calculation means is saturated;
1. A control device for a water heater, comprising: display means for displaying display operations. (2) The arithmetic means comprises an operational amplifier -C%5, and the saturation detecting means (Cj component circuit) detects that the conditions of Imaginary Show 1 of an operational amplifier consisting of 11 years are broken. (114), and the above-mentioned display means displays (1-) when the condition of ~ collapses to τ [both mika direction and negative positive direction)].
Claim i l
The water heater control device described in lj. (3) The display means is characterized by having two displays with different display modes.
A water heater control device as described in Section 1.

Claims (1)

[Scope of Claims] (1) Warm melon deviation detection means that outputs the difference between the odors of the four hot water products from the heat exchanger and the humidity; A means for performing proportional, integral, and differential operations using the input as a manual bow, and
In the control device of the Sli device, the proportional and integral values of the above calculation means are calculated. A saturation detection means for detecting that ζ is saturated, and a display operation in response to the detection No. 13 of this detection means:'Q
The means of indicating jQ () is characterized by) easy J! 1 control device (2) The above calculation means is operated by an input amplifier 17.!, and the above saturation detection means is operated by an imaginary seat of the output amplifier constituting the valve circuit. The above-mentioned display means is configured to detect that 1 has been written as i゛11.
Claim 1 characterized in that, when the original line 1') of the original show l- collapses in both the j[ direction and the negative direction, each of the children is displayed η. Conditions described in section θ): Control device for the device. (3) The water heater control device according to claim 2, wherein the display means has two indicators having different display modes.