JPH0694301A - Replenishing water quantity measuring device for hot water heating system - Google Patents

Abstract

PURPOSE:To make it possible to measure the quantity of replenishing water while heating operation is continued by a method wherein a water supply control valve is opened, and the water supply speed is calcualted by the water supply quantity and time from when a water supply stop level sensor is operated to when the water supply is stopped, and the second water replenishing and after, the replenishing water quantity is controlled by the water supply speed and time. CONSTITUTION:The period of time from when a water supply start level sensor 2b to when a water supply stop level sensor 2a is operated is measured by a water supply time measuring circuit 9a. A water supply quantity operation circuit 8 operates the water supply speed by a water quantity (designed value of a tank 1) between the water supply start level sensor 2b and water supply stop level sensor 2a. This water supply speed is stored in a control device 8, and at the time of second water replenishment and after, the replenishing water quantity is controlled by the water supply speed and the time which is output by the water supply time measuring circuit 9a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the amount of supplementary water which is effective for the detection of water leakage from the system and the first water filling (air venting) operation when the hot water heating system is installed in a hot water heating system. .

[0002]

2. Description of the Related Art FIG. 2 shows a conventional hot water heating system and a makeup water amount measuring apparatus. In this figure, 1 is a hot water tank, 2 is a water amount detector, 2a is a water supply stop level sensor, 2b is a water supply start level sensor, 3 is a water supply control valve attached to a water supply line 3a, 4 is a circulation pump,
5 is a heat exchanger, 6 is a circulation line, 7 is a radiator, 8 is a control circuit, 9 is a circuit for measuring the number of times of water supply, and 10 is a circuit for calculating the amount of water supply. When the water supply start level sensor 2b detects this, the control circuit 8 opens the water supply control valve 3 to supply water into the hot water tank 1, and when the water supply stop level sensor 2a detects the water supply stop level, the control circuit 8 Stop water supply. Then, the number of times of water supply N is measured by the number of times of water supply measurement circuit 9, and the water supply amount calculation circuit 10 obtains the amount of water supply by the product of the number of times of water supply N and the amount of water V from the water supply start level to the water supply stop level. If it exceeds a certain value, it is judged that there is water leakage from the system or that the water filling is inadequate when the system is installed. If it is less than a certain value, there is no water leakage or it is judged that the water filling is completed.

[0003]

However, in the above-mentioned conventional example, when the water supply amount is obtained while driving the circulation pump 4, an error occurs in the measurement of the water supply amount. Therefore, the heating operation (circulation pump) is temporarily stopped. It has the disadvantage of having to stop and do it.

An object of the present invention is to provide an apparatus capable of measuring the amount of makeup water without stopping the heating operation.

[0005]

The constitution of the makeup water amount measuring device in the hot water heating system according to the present invention is as follows.

[0006] In a system for heating by circulating water in a hot water tank to a circulation pump → heat exchanger → radiator → hot water tank, a water supply stop level sensor and a water supply start level sensor are installed in the hot water tank. A water supply control valve was attached to the water supply line that supplies water to the tank,
Water is supplied into the hot water tank by opening the water supply control valve of the water supply line, and the time T ₁ from the start of water supply until the water supply stop level sensor operates to stop the water supply is measured by the water supply time measuring circuit. Water supply speed v depending on the water volume V ₁ from the start level sensor to the water supply stop level sensor
(V = V ₁ / T ₁ ) is calculated, and when the water supply control valve is opened and water supply is started after the _second time, the amount of water supply V (V = v × T ₂ ) is calculated from the water supply speed v and the water supply time T _2. A supplementary water amount measuring device for a hot water heating system, characterized in that a replenishing water amount calculating circuit is provided.

[0007]

[Operation] The heating operation is carried out by circulating the hot water flowing from the hot water tank → circulation pump → radiator → hot water tank. In this process, if a water leak occurs, the water level in the hot water tank begins to drop, and when it reaches the water supply start level sensor, the control circuit opens the water supply control valve to start water supply, and the water level reaches the water supply stop level sensor. When it rises, it closes the water supply control valve. In this water supply, the control circuit measures the time T ₁ from the start of the water supply until the water supply stop level sensor operates to stop the water supply by the water supply time measuring circuit. Then, the control circuit by the water supply amount calculation circuit, the amount of water V ₁ of the from the water supply starting level sensor to the water supply stop level sensor to calculate the water velocity _{v (v = V 1 / T} 1), the water supply control valve in the second and subsequent When the water is opened and water supply is started, the amount of replenished water V (V = v × T ₂ ) is calculated from the water supply speed v and the makeup water time T ₂ .

The amount of supplementary water thus obtained is input to a water leakage determination circuit or a water filling determination circuit, where it is compared with respective reference values and used for water leakage determination or water filling determination.

EXAMPLE FIG. 1 shows an example of the present invention. Reference numeral 1 is a hot water tank, 2 is a water amount detector, and 2a is water supply (water injection)
Stop level sensor, 2b is water supply (water injection) start level sensor, 3 is a water supply control valve attached to the water supply line 3a, 4 is a circulation pump, 5 is a heat exchanger, 6 is a circulation line,
7 radiator, 8 controller, 9a are in the water supply time measuring circuit measures time T ₁ of the from the start of the water supply level sensor 2b to reach the water supply stop level sensor 2a. Reference numeral 10 denotes a water supply (water injection) amount calculation circuit, which determines the water supply speed v ₁ / v based on the water amount V ₁ between the water supply start level sensor 2b and the water supply stop level sensor 2a (known in advance from the design value of the hot water tank 1). The calculation is performed at T ₁ , this v is recorded, and after the second time, the replenishment amount V is calculated by v × T _{2 from the} v and the replenishment time T ₂ . In the above embodiment, the makeup water amount V can be obtained while driving the circulation pump 4 (heating).

[0009]

As described above, according to the present invention, the amount of water supplied to the hot water tank is determined not from the number of times of water supply but from the water supply speed based on the water supply time. (While) You can spot a leak. Therefore, it is convenient because the leak of water can be found quickly and the heating does not have to be stopped. Further, the present invention can be applied to the water filling judgment when the hot water heating is installed, and the water filling judgment can be efficiently performed.

[Brief description of drawings]

FIG. 1 is an explanatory view of a makeup water amount measuring device according to the present invention.

FIG. 2 is an explanatory view of a conventional makeup water amount measuring device.

[Explanation of symbols]

 1 Hot water tank 2 Water level detector 2a Water supply stop level sensor 2b Water supply start level sensor 3 Water supply control valve 3a Water supply line 4 Circulation pump 5 Heat exchanger 6 Circulation line 7 Radiator 8 Control circuit 9a Water supply time measuring circuit 10 Water supply amount calculation circuit

Claims (1)

[Claims] 1. A system in which water in a hot water tank is circulated through a circulation pump, a heat exchanger, a radiator, and a hot water tank for heating, and a water supply stop level sensor and a water supply start level sensor are installed in the hot water tank. , A water supply control valve is attached to the water supply line for supplying water into the hot water tank, the water supply control valve of the water supply line is opened to supply water into the hot water tank, and the water supply stop level sensor operates from the start of water supply to supply water. The time T ₁ until the water supply is stopped is measured by the water supply time measuring circuit, and the water supply speed v is calculated by the water amount V ₁ from the water supply start level sensor to the water supply stop level sensor.
(V = V ₁ / T ₁ ) is calculated, and when the water supply control valve is opened and water supply is started after the _second time, the amount of water supply V (V = v × T ₂ ) is calculated from the water supply speed v and the water supply time T _2. A supplementary water amount calculating circuit for determining the water supply amount is provided in the hot water heating system.