JPS6044754A - Gas instantaneous hot water supplier - Google Patents

Abstract

PURPOSE:To enable to maintain set hot water supplying temperature by a structure wherein a water regulating valve, which automatically throttles the amount of water supply, when the hot water supplying temperature exceeds the range controllable by the gas flow rate, is provided in a gas instantaneous hot water supplier equipped with an additional burning device or a space heater. CONSTITUTION:A controller 17 calculates gas flow rate based upon the water flow rate, incoming water temperature and delivery hot water temperature, all of which are obtained by receiving signals. A, B and C from sensors 3, 4 and 6, the pre-set temperature, the thermal efficiency of a heat exchanger 12 and the proportional gain so as to send a signal D to a proportioning valve 20 in order to regulate the flow rate of gas to be sent to a burner 13 and consequently to coincide the hot water supplying temperature with the set temperature. In addition, the controller 17 calculates a critical water flow rate based upon the incoming water temperature detected by the incoming water temperature sensor 4, the set temperature and the maximum capacity of a hot water supplier and at the same time compares said critical water flow rate with the water flow rate detected by the water flow rate sensor 3. If the water flow rate detected by the water flow rate sensor 3 exceeds the critical water flow rate, the controller 17 sends a signal E to the water regulating valve 3 so as to prevent water from flowing beyond the critical water flow rate.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas instantaneous water heater with reheating or heater.

BACKGROUND ART Conventionally, a two-can, two-channel type water heater having a structure shown in FIG. 1 has been known as a gas instantaneous water heater with reheating or heater.

To explain the one in Fig. 1, one device main body αη
A heat exchanger ← 4 and a burner OJ for hot water supply are additionally installed inside, and a water flow switch qQ is installed in the water supply pipe (1), and a hot water outlet temperature sensor (6) is installed in the hot water supply pipe (5). The circulation flow path α → has a heat dissipation section (8) outlet and a heat exchanger (b).
A distern αO is provided between the inlet, and a pump (9) is provided between the outlet of the distern αO and the inlet of the heat exchanger (6).
) and water flow switch QQ, and a hot water outlet temperature sensor (6) is installed near the outlet of the heat exchanger a.
) are each in electrical communication with a controller CL'I).

In addition, the above controller α is a solenoid valve α reversible proportional valve (A) installed in the gas supply pipe α → that supplies gas to the burner q.
I am also in contact with

When the radiator (8) is used, the pump (9) starts operating when the reheating or heating operation switch (al) is turned on, and the circulating water flows through the circulation flow path α→. When the flow exceeds the flow rate, the water flow switch αQ is activated and burner 01 is ignited, and the amount of gas is calculated based on the set temperature determined by the controller (1) and the temperature of the hot water temperature sensor (6), and the signal is sent to the proportional valve. The amount of gas is determined by going to (a).

The conventional system described above is a two-can, two-channel type, and the hot water supply side and the reheating or heating side each have a burner and a heat exchanger, and the reheating or heating side has a distiller, so the device itself is very large. Yes, the cost is also high. Moreover, since it has a distern, it is not a hassle to refill the distern with water, and energy loss occurs due to heat radiation from the distern.

The present invention aims to solve the above-mentioned problems, reduce the size and cost of the device, and eliminate the troublesome effort and energy loss of water replenishment.

The configuration of the present invention for achieving the above object is to convert the hot water supply temperature into the flow rate, water inlet temperature, set temperature, and the amount of gas to be played by the efficiency of the heat exchanger, or to adjust the above gas amount to the outlet temperature, the set temperature, and a proportional gain. In a gas instantaneous water heater that is controlled by the amount of gas calculated by adding the amount of gas calculated by Starting from the upstream side, a hot water temperature sensor is installed, and a water pulp that automatically reduces the water supply when the hot water temperature cannot be controlled by the gas ridge is installed. The inlet is connected via a pump, and the water supply pipe is connected between the pressure reducing check valve and the water flow sensor to the outlet of the radiator via a check box.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In this embodiment, hot water comes out by turning on the power switch and opening the hot water tap.

In the figure, 0◇ is the main body of the water heater. Gas is sent to the burner α→ via the gas supply pipe (A) and burned there, and water is sent to the heat exchanger (B) via the water supply pipe (1). The hot water enters the hot water tank, where it is heated, passes through the hot water supply pipe (5), and is supplied to the hot water tap (a).

The water heater body 0η branches the hot water supply pipe (5) to the circulating outgoing pipe) and the circulating return pipe (c) from the water supply pipe (1), respectively, and connects the circulating outgoing pipe (c) to the circulating outgoing pipe (c). Water heater body a■ Connect the circulation return pipe (c) to the inlet of the radiator (8) installed outside and the outlet of the radiator (8), respectively, and connect the water supply pipe (1) to the heat exchanger (6). The hot water supplied to and heated is sent to the radiator (8), and after being radiated by the radiator (8), it is returned to the heat exchanger (b).
Again, a heat exchanger (it can be heated with just one heat exchanger).

The water supply pipe (1) is provided with a pressure reducing check valve (2) on the upstream side of the circulation return pipe (c) branch, and a water flow sensor (3) and an inlet water temperature sensor (3) on the downstream side of the branch. 4) is provided with the former (3) on the upstream side.

The hot water supply pipe (5) is connected to the circulation outgoing pipe) on the upstream side from the branch part.
5 - The outlet water temperature sensor (6) is connected to the downstream (11) water flow pulp (
A force is provided respectively, and water is introduced from the water supply pipe (1) to fill the circulation channels (23, 24).

At this time, the air present in the circulation channels (23, 24) is discharged through an air vent valve (C) provided at an appropriate location in the circulation channels (23, 24), in the illustrated example, the circulation outbound pipe (C). Ru.

In addition, a pump (9) is installed in the circulation outgoing pipe @, and a pump (9) is installed in the circulation return pipe (c).
are each provided with a check valve OI.

Above, water flow sensor (3), water inlet temperature sensor (4),
The hot water temperature sensor (6), the water volume pulp (7), and the pump (9) are each electrically connected to a controller α provided separately from the main body of the water heater, and the water volume sensor (3) measures the water volume. Detects signal A and sends it to the inlet water temperature sensor (
4) detects the incoming water temperature and sends a signal B, and the outlet hot water temperature sensor (6) detects the outlet water temperature and sends a signal C to the controller 71.

On the other hand, the above-mentioned gas supply pipe (frame 1 is equipped with a solenoid valve 0, a governor (c), and a proportional valve copper in order from the upstream side, and the solenoid valves (1 and 1) are connected to the controller (1). communicated electrically.

-〇- The controller α is installed in a box Qη equipped with a power switch) and a radiator operation switch 2υ, and in response to the above issues A and BXC, the water volume, inlet water temperature, and outlet temperature are set in advance. It is configured to calculate the amount of gas based on the fc set temperature, the thermal efficiency of the heat exchanger (4), and the proportional gain, and send a signal to the proportional valve (7).

The determination of the gas amount is performed using the following arithmetic expression.

1i"1=(TS-TIN)XQ/η...α)
F2 = (lX(Ts-Totyr)X
Q...-■1+'l-F' 1 +F2...
・■F1: Gas fit by feedforward (K
cal 7 minutes) Gas amount by F2 + feedback (
Kcat/e)(,+: most P gas fit: (
Kc a ilo ) Q: Flowmeter TIN: Incoming water temperature C'C)'p□Ur: Outgoing water temperature Ts: Set temperature ('C) η: Efficiency of heat exchanger α: Proportional gay.

In response to the signal, the proportional valve increases or decreases the amount of gas sent to the burner (by 1 degree) to bring the hot water temperature to the set temperature.

The controller 〇η is a reed. It calculates the limit water amount based on the inlet water temperature detected by the inlet water temperature sensor (4), the set temperature, and the maximum capacity of the water heater. It is configured to compare and calculate the amount of water detected by the water amount sensor (3) and send a signal E to the water amount pulp (3) when the amount of water detected by the water amount sensor (3) exceeds the water amount limit.

The water flow valve (3) receives the signal E and throttles the amount of hot water supplied to the hot water tap (A) 9 to prevent water exceeding the limit water flow into the heat exchanger o.

Incidentally, the pump (9) is activated by turning on the radiator operation switch C2η.

Therefore, such a gas instantaneous water heater has a power switch (a).
and open the hot water pulp (b) of the hot water tap eyu.
The lagoon at the set temperature heated by the heat exchanger 0) is connected to the hot water supply pipe (5
) and is discharged from hot water tap 4.

The set temperature is set to, for example, 80° C., and if necessary, water is added to the hot water at the hot water supply tap part to mix it to the desired Pfr temperature.

That is, the hot water tap υ is also connected to the water supply pipe (1), and by opening the water pulp (c), the desired amount of water is supplied to the hot water tap (
b).

Also, if you turn on the power switch (c), close the hot water tap), and turn on the radiator operation switch CI), the pump (
9) is activated, the heat exchanger (b) heats the hot water supply pipe (
The hot water flowing to 5) is circulated to the outgoing pipe by the operation of the pump (9))
, the water supply pipe (1) via the radiator (8) and the circulation return pipe (c)
It circulates and flows back to the heat exchanger CI4, and in the process of the circulation flow, heat is radiated by the heat radiator (8).

Naturally, this circulating hot water is also controlled to a set temperature.

Backflow of the circulating hot water to the upstream side of the water supply pipe (1) is prevented by the pressure reducing check valve (2).

Next, if the use of the hot water faucet and the turning on of the radiator operation switch 01) overlap, the hot water is circulated through the radiator (8),
Hot water is supplied to the hot water tap (c) in both cases.

At this time, hot water can be supplied to the hot water tap (e) by the number of water heaters minus the number used for the radiator.

Even if the hot water tap 4 is opened wide, the amount of hot water supplied to the hot water tap 4 is controlled within a supplyable range by the action of the water flow valve (7).

The radiator (8) can be used for various purposes such as a reheating bus heater, space heater, dryer, etc., but in this example it is used as a reheating bus heater, so the radiator (8) is not shown in the drawing. Driving switch? ■ is represented as a bath operation switch.

Since the present invention has the above configuration, it has the following advantages.

(1) Since it has a one-can, two-channel configuration, there is no need for an independent burner or heat exchanger for the radiator, and there is no distern, making it very compact and at the same time reducing costs.

(2) Since there is no distern, heat radiation is small and energy loss is small.

(3) Since the water supplied from the water supply pipe is heated and circulated, there is no need to replenish the water, which saves time and effort.

10- (4) Can be used simultaneously within the capacity of the water heater.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an example of a conventional gas instantaneous water heater with reheating or heater, and FIG. 2 is a schematic diagram of a gas instantaneous water heater showing an example of the implementation of the present invention. 1...Water supply pipe 2...Pressure reducing check valve 3...Water flow sensor 4...Incoming water temperature sensor 5--Hot water supply pipe 6
... Hot water temperature sensor 7 ... Water flow valve 8 ...
Heat sink 9...Pump 10...Chutsuki valve. Patent Applicant: Totokiki Co., Ltd. 11- Continued from page 1 0 Inventor: Maki 1) Atsushi, Koka-gun, Shiga Prefecture, Ega Factory, P Nishimachi, Oaza Asakuni 1 Totokiki Co., Ltd. - 279 =

Claims (1)

[Claims] The hot water supply temperature is determined by the gas amount calculated based on the flow rate, water inlet temperature, set temperature, and heat exchanger efficiency, or the gas amount calculated by adding the gas amount calculated based on the hot water output temperature, set temperature, and proportional gain to the above gas amount. In a multi-control gas instantaneous hot water heater, a pressure reducing check valve, a water flow rate sensor, and an inlet water temperature sensor are installed in the water supply pipe in order from the upstream side, and a hot water outlet temperature sensor and a hot water supply temperature sensor are installed in the hot water supply pipe in order from the upstream side. In addition to providing a water flow pulp that automatically reduces the water supply amount when the gas volume cannot be controlled, the hot water supply pipe is connected to the radiator inlet via a pump between the outlet hot water temperature sensor and the water flow pulp, and the water supply pipe is A gas instantaneous water heater that connects the outlet of a radiator between a pressure reducing check valve and a water flow sensor via a check valve.