JPS5837448A - Water quantity control device for hot water supplying machine - Google Patents

Abstract

PURPOSE:To stabilize hot water supplying capability and temperature control, by computing the maximum usable flow rate from a preset temperature and a temperature of water supply and controlling the water supply quantity. CONSTITUTION:A main body A of the hot water supplying machine is constituted by a gas burner (a), a combustion chamber (b), and a heat exchanger (c). A water quantity control valve 5 is provided in a water supply path 4 to the heat exchanger (c), and a water temperature sensor 6 is provided at the upper stream side of the valve. Based on the water temperature T1 deg.C detected by the water temperature sensor 6, a preset temperature T deg.C, and the maximum hot water supplying capability FmaxKcal/min, the maximum usable flow rate Ql/min is computed by an Formula Q=Fmax/(T-T1) in a control device 13. A current is conducted through a coil 12 of the water quantity control valve 5 and the water quantity is controlled.

Description

[Detailed description of the invention] The present invention relates to a water flow control device for a water heater.

Conventionally, a water governor has been used as this type of water flow control device, but this device sets the primary water pressure to an appropriate secondary water pressure and stabilizes the water temperature when the hot water tap is opened. This is the device.

In particular, gas proportional water heaters, which have been widely used in recent years, use only hot water at an appropriate temperature without mixing water and hot water, so they supply hot water at an appropriate temperature of about 45°C when the winter water temperature is about 5°C. For example, in the case of a size 10 water heater, the set amount of water is set in advance in the machine so that the water heater can be used.

For this reason, when the water temperature rises in the summer, for example, 1
If the water temperature rises to 25℃ with a No. 0 water heater (45℃-
25°C) x 6.25 minutes ÷ 25 KeaV minutes; At No. 5, the hot water supply capacity will be nearly half.

When the set temperature goes from the appropriate temperature of 45°C to a high temperature, for example 65°C, the water temperature cannot be controlled, especially in winter. At some point, the water temperature only reached 50℃.

Furthermore, if a water heater is installed on the first floor and supplies hot water to the second floor, if the pressure is set using a water governor, the amount of water will decrease by the back pressure on the second floor, making it impossible to supply sufficient hot water.

The purpose of the present invention is to solve the above-mentioned problems, and to enable sufficient control of the hot water temperature even if the hot water supply temperature is set to a high temperature without reducing the hot water supply capacity even if the water temperature and set temperature change. It is.

The basic structure of the present invention is that a water flow control pulp is provided in the water supply channel upstream of the heat exchanger, and the flow rate is automatically controlled by a control device and calculated from the water temperature detected by the water temperature sensor and the set temperature. This allows the maximum usable flow rate to flow through the heat exchanger.

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

This embodiment relates to a gas water heater, and the main body of the water heater includes a gas burner (a), a combustion chamber Φ), a heat exchanger (
e), the combustion chamber Φ) is disposed above the gas burner Φ), and the heat exchanger (e) is arranged above the combustion chamber (b).
placed above.

The heat exchanger (c) is constructed by installing a heat exchange pipe (2) integrally equipped with a large number of heat exchange fins (1) on the circumferential surface in a meandering manner in a box frame-shaped container body (3). The above-mentioned vessel body (3) is placed on the upper end of the combustion chamber and fixed thereto, and the heat exchange pipe (2) has one end connected to a water supply channel (4) that connects to a water supply source, and the other end. A water heater (not shown) is connected to the water heater.

A water flow control pulp (5) and a water temperature sensor (6) are connected to the water supply channel (4) upstream of the heat exchanger (c) connected to the heat exchange pipe (2).
) is placed on the upstream side.

The water flow control pulp (5) includes a constant flow valve (8) made of an elastic material that protrudes annularly from the flow path wall surface toward the center in a flow path (7) installed inside the main body (5); A truncated cone-shaped plug (9) whose diameter gradually decreases toward the upstream side is inserted into the constant flow valve (8), and when the water pressure is high, the plug (9) is inserted into the constant flow valve (8) on the downstream side of the constant flow valve (8). When the deflection to the constant flow valve (8) becomes large and the gap between the inner circumference of the constant flow valve (8) and the circumferential surface of the plug (9) becomes small, and the water pressure is low, the gap (to) is reduced, and the water pressure is lowered to the downstream side of the constant flow valve (8). The structure is such that the deflection of the pipe becomes smaller and the gap is enlarged, so that a predetermined amount of water always flows.

Also, water flow control valve (5) Fi plug (9)
is connected to an electromagnetic coil (1 plunger (not shown) through the spindle αυ, and the set water sound can be changed by operating the electromagnetic coil (A) and changing its position. Configure.

The operation of the q electromagnetic coils for changing the position of the plug (9) is controlled by the control device 0.

The control device α″4 is housed in a control box that is separate from the main body of the water heater (4), and is electrically connected to the water volume control pulp (5) and water temperature sensor (6). The maximum usable flow rate is calculated from the water temperature detected by the water temperature sensor (6) and the set temperature set by operating the hot water temperature adjustment volume, and based on that, the electromagnetic coil of the water flow control pulp (5) It is configured to issue a command to the edge and change the position of the plug (9) of the water volume control pulp (5) to a position where the calculated flow rate can be flowed.

The maximum usable flow rate is calculated by the following formula:

In addition, in the V dormitory example, the gas burner (a) has a structure that forcibly supplies primary air and secondary 9 air to the fan 04, and the primary and secondary air is supplied by air volume control pulp. The air is sent through the primary and secondary air supply pipes (b) and θf.

The primary air supply pipe (g) is inserted into the gas burner body (a'), and the mixed gas injection hole (to) is located below the flame hole (to) opened on the top surface of the gas burner body (a).
has been established.

The secondary air supply pipe α is inserted into the lower part of the combustion chamber (b),
The opening at its tip faces the flame hole (goods).

On the other hand, the fuel gas is supplied into the primary air supply pipe (G) through the gas supply pipe (A), mixed with the primary air in the iron pipe (B), and the mixed gas injection hole (B) is blown into the flame hole ( 2) and burns in the iron part.

The gas supply pipe (E) is equipped with a sequential solenoid valve (C), a gas governor), a gas proportional valve) from the upstream equipment outside the gas burner body (a'), and the gas proportional valve (to) and the above fan α◆ and air volume control valve (b)
is electrically connected to the aforementioned control device (g), and is controlled for each gas quality.

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

(1) Since the maximum usable flow rate calculated based on the water temperature and set temperature is always supplied to the heat exchanger, the water temperature and set temperature change and the actual hot water supply capacity decreases. It can be used up to

(2) Even if the set temperature is set to a high temperature, hot water at the set temperature can be reliably supplied and the hot water temperature can be accurately controlled.

(3) Since the water supply amount is set regardless of the secondary pressure, the water supply amount does not decrease even when back pressure is applied, and a sufficient amount of hot water can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a water flow control device for a water heater showing an embodiment of the present invention, and FIG. 2 is a sectional view of a main part of a water flow control valve, which is a main component of the present invention. C... Heat exchanger 4... Water supply channel 5...
・Water flow control valve 6...Water temperature sensor 1
3...Control device. Patent applicant: Totokiki Co., Ltd. 1II211 ↑ August 1980 / Director of the Patent Office Kazuo Wakasugi (Examiner of the Patent Office) 1. Case indication 1982 Patent Application No. 135672 2. Invention Name of water heater water flow control device 3 Relationship with the case of the person making the amendment Abbreviation of name of patent applicant) (AO8) Totokiki Co., Ltd. 4 Address of agent 5-chome Hakusan, Bunkyo-ku, Tokyo No. 14 No. 7, Showa Year, Month 11 6, Subject of amendment (1) Detailed explanation of the invention in the specification Q.

Claims (1)

[Claims] A water temperature sensor that is installed in a water supply channel upstream of the heat exchanger and detects the temperature of water flowing through the flow channel; a water flow control pulp that controls the amount of water supplied to the heat exchanger to a set constant water flow; It electrically communicates with the water temperature sensor and water flow control pulp, calculates the maximum usable flow rate from the set temperature and the water temperature detected by the water temperature sensor, operates the water flow control pulp, and controls the amount of water supplied to the heat exchanger as described above. A water flow rate control device for a water heater, characterized in that it is configured with a control device that sets the calculated maximum usable flow rate.