JPH07110162A - Instantaneous heating type hot-water supply apparatus - Google Patents

Abstract

PURPOSE:To reduce the frequency of temperature setting manipulation from a hot-water faucet to improve the convenience of use. CONSTITUTION:When the hot-water supply temperature and the hot-water flow rate are set by a temperature knob T1 and a flow rate knob Q1, an identification sensor of a remote controller R1 outputs an identification number of the hot-water faucet M1 in use. A hot-water supply temperature controller 18 determines the start of hot-water supply from the hot-water faucet M1 according to the identification number and detection signal of a water flow sensor 11, and a fixed set temperature previously set and input for each hot-water faucet is set as a control value of the hot-water outlet temperature of a heat exchanger 7. Therefore, the need of the setting/input manipulation of the control value can be eliminate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a household instantaneous heating type hot water supply device for supplying hot water from a hot water supply device of proportional combustion control to a hot and cold water mixing tap for automatic temperature control, and in particular, simplifies temperature setting operation. Control.

[0002]

2. Description of the Related Art Conventionally, a hot water supply device of this type has a significantly improved accuracy of hot water discharged from a water heater by employing a proportional combustion technique and a microcomputer (hereinafter, also referred to as a microcomputer), and a remote controller (hereinafter, The operation input information (also called remote control) has been enriched and usability has been improved.

[0003]

However, in order to obtain a satisfactory hot water supply with the conventional hot water supply apparatus, the hot water supply mixer is used to manually adjust the hot water supply flow rate to set the temperature setting lever to the desired hot water supply temperature. On top of that, the temperature of hot water discharged from the water heater must be set and input by the remote controller installed on the side of the hot and cold water mixing tap, and if the hot water is not the same, this double temperature setting operation is required every time. The point remained.

Therefore, an object of the present invention is to further reduce the required hot water supply operation from the hot water tap and further improve the operability of hot water supply.

[0005]

To achieve the above object, the first means of the instant heating type hot water supply apparatus according to the present invention is
By connecting to the hot water supply channel and hot water supply channel of the instantaneous heating type water heater, and setting the hot water supply flow rate and hot water supply temperature, the water temperature is adjusted automatically and the set hot water volume is mixed to supply hot water. The hot water supply identifier that outputs to the water heater an identification signal that can identify whether or not the hot water supply has started or ended and which hot water supply tap, and whether or not the hot water supply has been used from each hot water supply tap and water flow through the heat exchanger An outlet hot water temperature controller is provided which arithmetically outputs a proportional control signal of the burner based on a fixed flow rate, an incoming water temperature, an outgoing hot water temperature, and a fixed set temperature set for each signal of the hot water supply discriminator.

The second means of the present invention is that, when the hot water outlet temperature controller receives a change in the signal from another hot water supply discriminator and the signal from the water amount sensor during the hot water supply operation, the fixed setting is set for each hot water tap. The burner proportional control signal is calculated and output using the high temperature side.

Further, the third means of the present invention is that, when the heating capacity of the heat exchanger calculated based on the set temperature as the control target value of the hot water discharge temperature from the heat exchanger is less than the maximum rated capacity, the maximum rated value is obtained. Hot water temperature controller that calculates and outputs the possible hot water temperature according to the capacity, and a temperature display that displays the temperature range of the possible hot water temperature from the set temperature during hot water supply, and that the set hot water temperature can be distinguished from the temperature range It is equipped with a vessel.

[0008]

According to the above-mentioned first means, the instant heating type hot water supply apparatus of the present invention is provided with a switch for operating and inputting whether hot water is used or not, for example, near the hot water tap, or by infrared rays to inform the hot water user. It is equipped with a detector for automatic detection, and sends an identification signal to the water heater to identify the hot water tap. When the hot water supply flow rate is adjusted and the hot water supply temperature is set to the hot water tap, the hot water outlet temperature controller identifies the hot water tap to be used for hot water supply from the identification signal, and presets for this hot water tap. The proportional control signal of the burner is calculated and output using the fixed temperature thus obtained.

The hot-water taps installed at each hot-water supply location have a high frequency of hot-water supply unique to the hot-water supply location, such as a washroom or hand-washing in the case of a washroom, at a set temperature that can be fixed as warm water. The most rational operation of the water heater can be achieved by discharging the hot water from the heat exchanger at a temperature slightly higher than the hot water temperature that is used a lot. In addition, for hot water usage that is unique to the location where the hot water tap is installed, it is not necessary to input the set temperature to the hot water heater each time.

Further, according to the second means, when hot water is simultaneously used at a plurality of hot water taps, even if hot water is being supplied to other hot water taps at a low hot water temperature, the hot water temperature will be high later. Even if simultaneous hot water supply at a fixed set temperature that requires a hot water supply, the hot water temperature controller controls the hot water temperature at the fixed set temperature on the high temperature side, and simultaneous hot water supply with a high frequency of use at the fixed set temperature is the same as when using a single hot water supply. At times, it is not necessary to input the set temperature to the water heater.

Further, according to the third means, the present invention makes the hot water supply temperature higher than the set temperature of the temperature indicator when the hot water supply temperature is once set and the hot water supply temperature is to be raised in the middle. In this case, it is possible to easily determine that hot water can be supplied without reducing the hot water supply flow rate within the range of the possible hot water output of the temperature indicator.

[0012]

Embodiments of the instant heating type hot water supply apparatus of the present invention will be specifically described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the present invention in which a gas-fueled instantaneous heating type water heater 1 is provided with a plurality of hot water taps M _i ( _i = 1, 2, 3, 4) via a hot water outlet passage 2. Connect to the water heater 1
It is also connected to the water supply channel 3 which is branched from the water supply to the. Hot water tap M
_i is the temperature of the temperature knob T _i for setting the temperature at which the hot water to be supplied from the hot water outlet 2 and the water to be supplied from the water supply passage 3 and the flow rate knob Q _i for manually adjusting the hot water supply flow rate to be supplied. Built-in thermo-valve etc. to automatically mix hot water and supply hot water. The hot water tap M _i is installed in the kitchen, washroom, laundry, bathroom, etc. of the house.

Remote controls R _i for remote operation are provided in the immediate vicinity of the hot water tap M _i . As shown in FIG. 2, the remote controller R _i has a display plate 5 for setting temperature and the like, a display 6 for indicating the temperature range from the set temperature during hot water supply to the possible hot water temperature by lighting, and preparation for operation of the water heater 1. switch S _Di inputting instructions, switch S _Ti for the input operation of different arbitrary set temperature (and allowed to 80 ° C.) and the specific fixed setting temperature water tap M _i, infrared etc. the user of the hot water faucet M _i It is equipped with an identification sensor S _Ci or the like that is detected by.

A water inlet temperature sensor 10 for detecting the water inlet temperature in a water passage 8 which guides the water supply to the water heater 1 and heats it by a heat exchanger 7 and then discharges the hot water to a hot water outlet 2, a water amount sensor 11 for detecting the water flow rate, A water amount control valve 12 for controlling the flow rate of water flow, a hot water temperature sensor 13 for detecting the hot water temperature, and the like are provided. The gas as fuel is proportionally controlled by the proportional valve 15 and is supplied to the burner 16 which heats and burns the heat exchanger 7. The signals from the above sensors are input to the controller 17, and the controller 17 controls the operation sequence. The controller 17 is provided with a tap water temperature controller 18 that outputs control signals to the proportional valve 15, the water amount control valve 12 and the like on the basis of signals from the respective sensors. The controller 17 also communicates with the remote control R _{i as} indicated by the dashed line in the figure.

(Use of Hot Water Supply at Fixed Set Temperature) Next, the fixed set temperature of the hot water tap M _i installed at each hot water supply location such as a kitchen will be described. As shown in Table 1, each hot water tap M _i is
Provide each at the designated hot water supply location.

[0017]

[Table 1]

As shown in the table, the main uses of each hot water tap M _{i, which} are provided at hot water supply points, are listed. For each of these uses, the most frequently used usage of each hot water tap M _i is set. And
Each application is used at almost the same hot water supply temperature throughout the year, thus enabling the hot water supply temperature after mixing hot and cold water.
_The hot water temperature supplied from the water heater 1 to the _i is set to a fixed set temperature as shown in the table, which is a slightly higher temperature in consideration of radiation loss in the hot water passage 2.

If the fixed set temperature is suppressed to a low level, in addition to the reduction of the heat radiation loss, the risk of burns can be prevented even if the temperature knob T _i of the hot water tap M _{i is} accidentally raised to a high temperature. It is possible to obtain various rationale such that the heat exchange efficiency is higher when a large amount of water is exchanged at a lower temperature than the water passage of 1. In particular, when the hot water supply temperature is the same with the same hot water plug M _i , but the hot water is used intermittently many times, the temperature knob T _i can be set once and only the opening / closing operation of the flow rate knob Q _i is required. Can be remarkably easy and less.

The operation of the water heater 1 at a fixed set temperature will be described. When the switch S _D2 of the remote controller R ₂ is turned on, the controller 17 is turned on unless the switch S _D2 is turned off, and the water flow sensor 11 sends a water flow detection signal. When it receives it, it enters the state of operation preparation for starting heating operation. Then, the discriminator S _C1
There sends an identification signal, the temperature knob T ₂ of the set and the flow rate knob Q ₂ by unplugging the water tap M _2, when the water amount sensor 11 enters a water flow detection signal to the controller 17, the controller 17 in heating operation enter.

The hot water outlet temperature controller 18 identifies the hot water tap M ₂ used for hot water supply from the identification signal, and the fixed set temperature of 40 ° C.
Determine. Then, the amount of gas supplied to the burner 16 including the signal of the incoming water temperature sensor 10 is calculated and transmitted to the proportional valve 15 to control the outlet heated water temperature of the heat exchanger 7 to a fixed set temperature.
The hot water tap M ₂ that receives this hot water supplies hot water so that the hot water supply temperature of the temperature knob T _{2 and} the hot water supply flow rate of the flow rate knob Q ₂ are substantially satisfied. When the desired amount of hot water is reached and the flow rate knob Q ₂ is closed, a change in the signal of the water amount sensor 11 causes a change in the controller 17
Stops the hot water supply operation.

(Use of simultaneous hot water supply) The hot water tap M₂Hot water supply in
Inside the kitchen hot water tap M₁About simultaneous hot water supply
Reveal Hot water tap M₂At a fixed set temperature of 40 ℃
When in the kitchen, the temperature knob T₁, Flow rate knob Q₂Manipulate
When made, the discriminator S_C2Is input to the controller 17.
The hot water temperature controller 18 controls the flow rate signal from the water amount sensor 11.
An increase is detected, and the hot water tap M is identified from the identification signal.₁Hot water on
It is determined that. Therefore, hot water tap M ₁Fixed setting
The temperature of 60 ℃ is higher than the tap water temperature of 40 ℃ that we have controlled so far.
It is determined to be high, and the hot water temperature is controlled to be changed to 60 ° C.

Since the different fixed set temperatures (40 ° C. and 60 ° C.) are controlled to the higher side, the calculation value of the heating amount that makes the control signal of the proportional valve 15 changes. That is, the amount of heating by the hot water tap M _{1 is} added to the amount of heating previously calculated for only the hot water tap M ₂ to calculate the water flow rate at a fixed set temperature of 60 ° C. Then, the control signal of the water flow rate is transmitted to the water amount control valve 12. That is, the heat exchanger 7 is heated by the burner 16 whose gas amount has been changed so that the tap water temperature of the fixed set temperature of 60 ° C. is produced at the calculated water flow rate.

The hot water supply temperature of the hot water supply tap M ₂ increases from 40 ° C. to 60 ° C., the amount of hot water taken in is decreased to increase the amount of supplied water, and the hot water supply temperature is automatically adjusted and maintained at the set temperature of the temperature knob T _2. . At this time, the change in the hot water supply flow rate adjusted by the flow rate knob Q ₂ is allowed. Of course, when the capacity required for the simultaneous hot water supply exceeds the maximum rated capacity, the water flow rate is limited within the range, and the desired hot water flow rate at the hot water taps M ₁ and M ₂ is automatically reduced.

With this simultaneous hot water supply control, despite the fact that the hot water is used later in the kitchen, it is not necessary to confirm the display temperature of the remote controller, which is conventionally practiced, and the operation of inputting the set temperature to the water heater 1 is required. The effect of the above-mentioned (use of a single hot water supply at a fixed set temperature) can be expected in almost the same manner. The same thing can be said not only in two places but also in three places where hot water is supplied simultaneously.

(Use of Hot Water Supply at Arbitrarily Set Temperature) Next, a method of using the hot water supply at a fixed set temperature will be described. When it is desired to add hot water at a high temperature of 70 ° C. to a bath cooled with the hot water tap M ₃ , the flow rate knob Q ₃ is adjusted so that a high temperature can be obtained in consideration of the ability.
Initially, the display plate 5 displays a fixed set temperature of 50 ° C., and the display 6 shows the range up to the temperature corresponding to the maximum rated capacity.
The display is lit as in (a), and the fixed set temperature of 50 ° C. is displayed in blinking. And switch S _T3 at the maximum temperature of 80 ℃
When the setting is input, the blinking part changes from 50 ° C. to 80 ° C., and the display of the display board 5 is also changed to 80 ° C. At this time, if the temperature knob T ₃ is also adjusted to the maximum set temperature of 80 ° C., hot water of about 80 ° C. will soon be obtained, and the flow rate knob Q ₃ will be closed after the required amount of hot water has been supplied.

The operation of the water heater 1 for this series of hot water supply operations will be described with reference to the flowchart of FIG. When the flow rate knob Q ₃ is opened and closed in S1, the discriminator S _C3 outputs a discrimination signal in S2. When the hot water temperature controller 18 which has received the identification signal to receive water flow detection signal from the water sensor 11 at S3, calculates a required heat quantity to determine the hot-water supply initiation at the hot-water tap M _3, control to the proportional valve 15 Output signal and S4
Start heating operation at a fixed set temperature of 50 ° C. At the same time, if we can calculate the maximum possible hot water temperature to be 80 ° C,
In S5, a signal is output to the display 6 to light the temperature range of 50 ° C to 80 ° C, and the fixed set temperature around 50 ° C is blinked.

The user who confirms this temperature display sets both the temperature knob T ₃ and the switch S _T3 to a possible hot water temperature of 80 ° C. in S6 so that the bath water temperature can be raised to a desired temperature in a short time. To do. The tap water temperature controller 18 that has newly received the input signal from the temperature knob T ₃ changes the display on the display plate 5 from 50 ° C. to 80 ° C. in S7, and the display device 6 displays FIG.
Change the blinking point from 50 ° C to 80 ° C as shown in.
This display indicates that the current hot water supply flow rate can be set up to 80 ° C. above the fixed set temperature 50 ° C. of the hot water tap M ₃ , and now it is informing that hot water is being discharged at the maximum temperature. And 80
If it is desired to lower the temperature, the temperature knob T ₃ may be reset to a lower value.

In S7, the hot water outlet temperature controller 18 further calculates the gas amount of the proportional valve 15 corresponding to the current hot water supply flow rate, the set temperature of 80 ° C., and the incoming water temperature, and outputs the signal. Then, in S8, the amount of gas is finely adjusted and controlled so that the detection signal from the hot water temperature sensor 13 becomes 80 ° C. At this time, the hot water tap M ₃ has the same temperature as the hot water taken in and the hot water supply, and the water input from the water supply passage 3 is stopped. When the water in the bathtub rises to almost the desired temperature, S
At 9, close the flow rate knob Q ₃ . Water sensor 1 in S10
The controller 17 which has received that the signal from 1 has become 0
Stops the heating operation of the water heater 1 in S11 and erases the set value of the switch S _T3 .

After that, although not shown in the flow chart, when the flow rate knob Q ₃ is opened again, the water heater 1
Hot water temperature of from as long as you do not enter operation the switch S _T3,
The fixed set temperature is 50 ° C. That is, even when the temperature knob T ₃ is not returned from the 80 ° C. setting and it is desired to supply the hot water at 50 ° C. or lower, the high temperature hot water supply of 80 ° C. can be automatically prevented. It should be noted that a setting input lower than the temperature range of the display 6 can of course be performed at any time.

In this way, the display 6 can be conveniently used when hot water having a temperature higher than the fixed set temperature is desired. For example, if the available hot water temperature is only 70 ° C in the flow of S5,
It can be understood that the temperature can be raised to 80 ° C if the flow rate control knob Q ₃ is reduced a little further, and after confirming that, it is possible to reliably discharge hot water at 80 ° C. In the conventional usage, when the temperature knob T ₃ and the switch S _T3 are set to 80 ° C., the water flow rate control valve 12 automatically controls the hot water flow rate that meets these conditions. In this conventional usage, the set temperature of the switch S _T3 has priority, but
In the present embodiment, high-temperature hot water discharge can be performed while checking the possible hot water temperature by giving priority to the hot water flow rate. That is, the hot water supply temperature can be raised without reducing the hot water supply flow rate.

An example in which there is an arbitrary set temperature at one location for simultaneous hot water supply will be described. For example, the hot water tap M ₁ is used to change the setting from a fixed set temperature of 60 ° C. to an arbitrary set temperature of 40 ° C., and during hot water supply, the hot water tap M ₄ enters simultaneous hot water supply. In the hot water supply flow rate of the previously water tap M ₁ is any fewer, when the set temperature of the same 40 ° C. by setting the temperature knob T ₁ to 40 ° C. and the hot water supply by setting switch S _T1, the display of the remote controller R ₁ Figure 6
It is displayed as in (a). That is, the arbitrary set temperature 4
6) Calculated by the hot water temperature controller 18 from 0 ° C as the possible hot water temperature that can be discharged with the maximum rated capacity if the hot water supply flow rate at this time is 6
The temperature range up to 0 ° C. is displayed as the shaded area in the figure, and the arbitrarily set temperature 40 ° C. lower than this temperature range is displayed as a mesh. Although not shown, the display plate 5 displays 40 ° C. at this time.

When hot water is supplied to the hot water supply tap M ₁ at an arbitrary set temperature of 40 ° C. and hot water supply to the hot water supply temperature 30 ° C., which may be a fixed set temperature of 35 ° C., is started by the hot water supply tap M ₄ , the hot water outlet temperature controller 18 keeps the current temperature. The set temperature of 40 ° C. stored in the judgment memory is compared with the fixed set temperature of 35 ° C. at the hot water tap M ₄ which is read out after it is judged that the hot water is newly generated. Then, when it is judged that the arbitrarily set temperature of 40 ° C is higher, the stored data up to now is 40 ° C.
Is maintained as it is as the control value of the tap water temperature, the required gas amount is calculated, and a change signal is output to the proportional valve 15. At this time, if the amount of heat required for simultaneous hot water supply is equal to or less than the maximum rated capacity and there is still capacity, assuming that the possible hot water temperature is 50 ° C., the display 6 displays the display content as shown in FIG. Display changes.

When the simultaneous hot water supply capacity exceeds the maximum rated capacity, it is displayed as shown in FIG. 5 (c). From this display, it can be read that the set temperature is 40 ° C. and the hot water is being supplied with the maximum rated capacity with no margin. Also, FIG. 5 (d)
In the case where is displayed, there is simultaneous hot water supply at two set temperatures regardless of fixed set temperature or arbitrary set temperature at 40 ° C and 60 ° C. You can read that you are either lacking in capacity or using the full capacity. In this display, when the temperature range of 40 ° C. to 60 ° C. is indicated by diagonal lines, it is a case where the arbitrary setting temperature is set to 60 ° C. by the hot water tap M ₂ having a fixed setting temperature of 40 ° C., which is different from this case.

[0035] Incidentally, hot water classifier is not limited to the identification sensor S _Ci used in this embodiment, for example, to a one-touch operation input switch, the temperature knob T _i of each hot water faucet M _i
It may be incorporated in the hot water tap M _i so that an identification signal can be output when the or the flow rate knob Q _i is operated. In addition, each hot water tap M
It is also possible to provide a hot water supply flow rate detector _i and use this detection signal as an identification signal.

Further, by using this display device 6, even when the fixed set temperature control in the present embodiment is removed, the set temperatures of the other hot water taps are replaced with the fixed set temperatures and set in all the remote controllers. Another embodiment is conceivable in which the temperature from the temperature to the possible hot water temperature is lit and displayed, and the set temperature during hot water supply is displayed in blinking. At this time, if you look at this display with another hot water tap, the hot water supply capacity during hot water supply is now in the state of FIG. 3 (b) where the maximum rated capacity is present, or the state of FIG. You can judge whether. Then, as in this example, when the maximum temperature in the temperature range of the display unit 6 or a temperature near it is blinking,
It is possible to judge that it is impossible to perform simultaneous hot water supply that requires a large capacity with another hot water tap M _i .

When a fixed hot water temperature of 60 ° C. is required for the hot water tap M _i of the kitchen, for example, when it is desired to obtain hot water of 55 ° C., the temperature knob T ₁ is set to 55 ° C., but the hot water supply temperature is 30 ° C.
This is the second highest frequency of use cases that may be low. Even at this time, the fixed set temperature is frequently used 2 to 3
If it is set to a higher position in the circle, it is not necessary to intentionally input an arbitrary set temperature with the switch S _T1 , and it is only necessary to set the temperature knob T ₁ at 30 ° C. This hot water tap M ₁
When the fixed set temperature is set to the first use frequency as in the example of 1, the economical efficiency of operation can be optimized.

[0038]

As described in detail above, in claim 1 of the instant heating type hot water supply apparatus according to the present invention, when the hot water supply temperature and the hot water supply flow rate are set by the hot water supply tap for automatically adjusting the temperature, hot water supply operation is performed.
The hot water outlet temperature controller that receives the identification signal of this hot water supply operation from the hot water supply identifier identifies the hot water tap used for hot water supply by receiving the water flow detection signal from the water amount sensor, and fixes this preset hot water tap. Since the hot water from the heat exchanger is controlled by the set temperature, for example, if the fixed set temperature is set to the hot water supply application that is frequently used at the location where the hot water tap is installed, the number of times the hot water output temperature is input to the hot water supply device It is possible to achieve excellent effects in operating economy, safety against high-temperature burns, temperature durability of used parts, etc., while efficiently reducing the temperature.

According to the second aspect of the present invention, while hot water having a low hot water discharge temperature (fixed set temperature) is being supplied by another hot water tap, simultaneous hot water supply at a fixed set temperature that requires a high hot water discharge temperature later is performed. Also, by using a fixed set temperature on the high temperature side for the hot water outlet temperature controller, for example, if the fixed set temperature is adjusted to the hot water supply temperature that is frequently used, the hot water tap that will be used later for hot water supply at the fixed set temperature However, the same effect as the effect of the invention described in claim 1 can be expected.

Further, according to claim 3 of the present invention, the temperature range from the set temperature to the possible hot water temperature at which the hot water can be discharged at the maximum rated capacity and the set temperature can be visually distinguished from this temperature range. It is possible to read that there is a margin in hot water supply capacity by displaying in, and it is possible to increase the set temperature that can be raised without input failure, while maintaining the hot water flow rate once set with the hot water tap at about the same amount. .

[Brief description of drawings]

FIG. 1 is a system diagram showing a configuration of an instantaneous heating type hot water supply device in an embodiment of the present invention.

FIG. 2 is a front view of a remote controller of the same device.

[Fig. 3] (a) Diagram when the remote control display of the same device has a fixed set temperature. (B) Diagram when the remote control display of the same device has an arbitrary set temperature.

FIG. 4 is an operation flowchart of the device.

FIG. 5 (a) is a diagram when the display of the remote controller of the device is at an arbitrary set temperature (lower than the fixed set temperature). (B) is a diagram of the above (a) and simultaneous hot water supply. (D) Diagram when the remote control's display has maximum rated capacity at the set temperature (d) Diagram when the remote control's display has the maximum rated capacity at different set temperatures

[Explanation of symbols]

1 Hot water supply device M ₁ , M ₂ , M ₃ , M ₄ Hot water tap R ₁ , R ₂ , R ₃ , R ₄ Remote control 6 Display device 11 Water amount sensor 18 Hot water temperature controller S _Ti (for temperature setting) switch S _Ci identification Sensor (however, _i = 1, 2, 3, 4)

Claims (3)

[Claims] Claim: What is claimed is: 1. An instant heating type heat exchanger, and a burner for heating the heat exchanger by proportionally controlling each of combustion air and fuel.
An inlet water temperature sensor and an outlet water temperature sensor that detect the inlet water temperature and an outlet water temperature of the heat exchanger, a water amount sensor that detects the water flow rate of the heat exchanger, and a water amount control valve that controls the flow rate,
Mix hot water from the heat exchanger and hot water from the water supply channel,
A hot water supply tap that automatically adjusts the temperature to the set temperature for the set hot water supply flow rate, a hot water supply identifier that outputs a hot water supply presence / absence identification signal for each hot water supply tap, and a hot water supply discriminator signal and a water amount sensor signal Instantaneous heating equipped with a hot water temperature controller that judges the instruction and calculates and outputs a proportional control signal for the burner based on the fixed set temperature set for each signal of the hot water supply discriminator, the incoming water temperature, the water flow rate, and the hot water temperature signal. Water heater. 2. A hot water outlet temperature controller that receives a change in the signal of a different hot water supply discriminator and a signal of a water amount sensor during hot water supply outputs a proportional control signal of the burner by arithmetic operation using a high fixed temperature setting. Instant heating type hot water supply device described. 3. The heating capacity of the heat exchanger at the set temperature based on the signals of the incoming water temperature, the outgoing hot water temperature, and the water flow rate of the heat exchanger and the preset temperature signal of the outgoing hot water of the heat exchanger set by the temperature setting device. Is less than or equal to the maximum rated capacity, the hot water temperature controller that calculates and outputs the possible hot water temperature at the maximum rated capacity, the temperature range of the possible hot water temperature from the set temperature during hot water supply is displayed, and the set temperature during hot water supply is The instantaneous heating type hot water supply apparatus according to claim 1, further comprising a temperature indicator which is displayed separately from the temperature range.