JPH01252858A - Water quantity control device - Google Patents

Abstract

PURPOSE:To reduce the whole size of a water quantity control device including a tank, by providing an electric control means which drives a motor-operated valve so that a water level in the tank may be set at a specified water level which is detectable by a water level detecting device. CONSTITUTION:When a motor-operated valve 10 is opened by an electric control means 12, water flows into a tank 8 in proportion to the opening of the valve 10 and the water pressure. The opening of the motor-operated valve 10 is opened by specified degree until the water level reaches a specified water level A, monitoring the water level with a water level detecting means 9. When the water level reaches another specified water level B, the water level detecting means 9 detects the level B. The water level in the tank 8 is stabilized between the water level A and the water level B by closing the opening of the motor-operated valve 10 by a specified quantity so that the quantity of the water flowing into the tank may be equal to that of the water transferred out by a pump 11. In this manner, the water level in the tank can be detected, thereby controlling the quantity of water flowing into the tank with the motor-operated valve so that the quantity of the water transferred out by the pump may be equal to that of the water flowing into the tank. It is, therefore, possible to eliminate the application of a float and minimize the size of the whole device including the tank.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a water flow control device for a water heater such as a fully automatic power water heater.

BACKGROUND OF THE INVENTION In recent years, water heaters have become smaller and smaller, and water flow control devices have also become smaller.

An example of the above-mentioned water flow control device will be described below with reference to the drawings.

FIG. 2 shows a sectional view of the main parts of the water flow control device i:(, Hg(). In FIG. 2, 1 is a tank.

2 is a flow 1 and is fixed to the other end of the shaft 3. The shaft 3 has one end rotatably attached to the tank 1. Reference numeral 4 denotes a valve body, which is interlocked with the float 2 by loosely fitting a bottle 4a into a long hole 3a formed in the middle of the shaft 3. 5 is a valve seat communicating with the inside of the tank 1, which forms a water flow path 7 and also closes the water flow path 7 when combined with the valve body 4;
36 is a pump that communicates with the suction port 1& of the tank 1 and conveys the water in the tank 1.

The operation of the water flow control device configured as described above will be described below.

First, the water in the tank 1 is transported by the pump 6,
The water level in the tank goes down and float 2 also goes down. As the bottle 4& moves through the long hole 3a of the shaft 3, the valve body Δ also lowers and the water flow path opens.

Then, water is supplied into the dunk 1 from the water flow path γ, and the dunk 1 is located at a position where the amount of water conveyed by the pump 6 and the inflow l from the water flow path γ are equal. The water surface is what stabilizes it.

Problems to be Solved by the Invention However, in the above configuration, the amount of water is controlled by the buoyancy of the float 2, so if the water supply is at high water pressure, considering the use under such conditions, the float 2 is The problem is that the size of the water flow control device cannot be reduced as a whole because the size of the tank 1 is also limited.

In view of the above-mentioned problems, the present invention provides a water flow control device whose entire structure including the tank is downsized.

Means for Solving the Problems In order to solve the above problems, the water flow control device of the present invention includes a tank, a water level detection device installed in the tank, an electric valve for controlling the amount of water flowing into the tank, and a water control device installed in the tank. The tank is equipped with a pump for conveying water, and has an electric control means for driving the electric valve so that the water level in the tank reaches a predetermined water level detected by the water level detection device.

Effect The present invention has the above-described configuration, detects the water level in the tank with the water level detection device, controls the amount of water flowing into the tank with the electric valve, and makes it possible to equalize the amount of water conveyed by the pump and the amount of water flowing into the tank. The float can be eliminated, and the entire tank and water flow control device can be downsized.

EXAMPLE Hereinafter, a water flow control device according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a sectional view of essential parts of the water flow control device of the present invention. In FIG. 1, 8 is a tank, 9 is a water level detection device provided in the tank 8, 1o is an electric valve provided in the water supply channel 16 connected to the water supply port 8a of the tank 8, and 11 is the water in the tank 8. 12 is an electric control means. The water level detection device 9 is connected to each switch 13 in order to maintain the water level in the tank 8 between a low switch 13 and a high switch 14.
A signal is sent from 14 to the electric control means 12, and this means 1
The electric valve 1o is opened and closed by the signal from 2.

The operation of the water flow control device configured as described above will be explained.

First, the electric control means 12 opens the stain valve 10 at a constant opening degree. The amount of water flows into the water supply channel 16 and into the tank 8 according to the opening degree of the electric valve 10 and the water pressure. At this time, the amount of water flowing into the tank is set to be smaller than the amount of water expected to be transported from the tank 8 by the pump 11. When the water surface detection device 9 detects that the water surface in the tank 1 has reached a predetermined water level A, the pump 11 is driven by the electric control means 12 which receives this signal.

After this, when the water surface becomes lower than the water level A, the electric control means 12
The electric valve 10 is opened a certain amount at a time until the water surface reaches the water level A. Further, when the water surface reaches the water level B, the water surface detection device 9 detects the water level, and the electric control means 12 controls the stain valve 1.
By partially closing the 0 opening degree, the water level in the tank 8 can be stabilized between the water level A and the water level B, and the amount of water conveyed by the pump 11 flowing into the tank can be made equal.

Effects of the Invention As described above, the present invention includes a tank, a water level detection device for keeping the water level in the tank at a predetermined level, an electric valve for dividing the amount of water flowing into the tank, and a water level detecting device for keeping the water level in the tank at a predetermined level. The water flow control device is equipped with a pump for conveying water, and an electric control means for driving the electric valve so that the water level in the tank reaches a predetermined water level detected by the water level detection device, so that the conventional float can be abolished. can be downsized.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part of a water flow control device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a main part of a conventional water flow control device. 8...Tank, 9...Water surface detection device,
1o...Electric valve, 11...Pump, 1
2... Electric control means. Name of agent: Patent attorney Toshio Nakao and 1 other person8-
Tank 9-E surface inspection = 1 10-Electrical tjy* /f-1-Ho0n 7゛I2-Electricity %+1 Coconut-F-Role I3-Water volume 1 Ka, Fig. 74-Water volume Miyagi stirring , child actor figure 2

Claims (1)

[Claims] a tank, a water level detection device that detects the water level in the tank, and an electric valve that controls the amount of water flowing into the tank;
A water flow control device comprising: a pump for transporting water in the tank; and an electric control means for driving the electric valve so that the water surface in the tank reaches a predetermined water level detected by the water surface detection device.