JPH05118567A - Warm water room heater - Google Patents

Abstract

PURPOSE:To obtain a room heater in which opening of a hole of a heat exchanger is sensed. CONSTITUTION:A user side heat exchanger 7 containing a heat radiating side heat exchanger 5 of a circulating circuit 1 connected with a circulation pump 3 and a heat source side heat exchanger 2 is arranged in a second circulating circuit having a second circulation pump 9 and a radiator 10 piped from a warm water tank 6, and a water level sensor 16 is mounted at the intermediate between upper and lower overflowing ports 15 and 14 of a drain tank 13 connected through a pressure regulating valve 11 of the tank 6. Water flowing from a heat source circuit due to an opening trouble of a hole of the exchanger 5 is retained in the tank 13 through the tank 6, and a water level of the tank 13 is sensed to generate an alarm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water heating system having a semi-enclosed heating circuit.

[0002]

2. Description of the Related Art In a conventional hot water heating apparatus having a semi-enclosed heating circuit, a circulation circuit of a heat medium and a utilization side heat exchanger having a heat radiation side heat exchanger of this circulation circuit are connected. A warm water circulation circuit having a warm water tank and a reserve tank (drain tank) are connected to the warm water tank, the reserve tank is temporarily heated by the heating water expanded during heating, and the water in the heating circuit is cooled during cooling. It is configured to play the role of an auxiliary tank that returns when contracted. Further, in the heating circuit, in a device having a direct-fire heat exchanger, a method of detecting a shortage of heating water in a reserve tank has been adopted.

[0003]

In this case, a system in which the heating circuit is of a semi-sealed type by a pressure regulating valve is generally used, but the heat source is supplied to the circuit by heat exchange of water-water. In the heating circuit, perforation of the heat exchanger due to erosion is a problem. When perforation occurs in the heat exchanger, water is pressed into the heating circuit from the heat source circuit with a built-in powerful pump.Therefore, it becomes necessary to detect the inflow water from the heat source circuit due to the perforation failure of the heat exchanger. It was

In view of the above situation, it is an object of the present invention to provide a hot water heating apparatus that solves the above problems by providing a detection unit near the overflow port (hole) provided in the drain tank. ..

[0005]

According to the present invention, there is provided a heat medium circulation circuit comprising a first circulation pump, a heat source side heat exchanger and a heat radiation side heat exchanger, a hot water tank, a second circulation pump, and the heat radiation. A second circulation circuit of hot water consisting of a utilization side heat exchanger and a radiator having a built-in side heat exchanger, a drain tank connected to a hot water tank via a pressure regulating valve, and having an overflow port, and this drain tank A water level detector for detecting the water level near the overflow port is provided, and an alarm is issued based on the signal from the water level detector.

[0006]

With the above configuration, the heat of the user side heat exchanger connected to the hot water tank at the heat radiating side heat exchanger position where the heat medium heated by the heat source side heat exchanger becomes a part of the double pipe. Heat is exchanged with the medium, and the radiator provided in the second circulation circuit performs predetermined heating. In this case, the heating water heated and expanded during heating temporarily flows out from the warm water tank to the drain tank, and returns when the water in the heating circuit contracts during cooling. Here, in a heating circuit that supplies a heat source using water-water heat exchange, a failure easily occurs in which a hole is opened on the heat radiation side heat exchanger side that is pressurized, and this water passes through the use side heat exchanger side. Although it flows out from the hot water tank to the drain tank, the drain tank is equipped with a water level detector that issues an alarm when the water level reaches a predetermined level, so that early detection can be performed.

[0007]

The present invention will be described below with reference to the drawings of the embodiments.

FIGS. 1 and 2 show a heating device of the type that uses a water-water heat exchanger to supply the heat source, and 1 is a heat source side heat exchanger connected to a separate heat source device (not shown) provided on the roof or the like. Two
Also, in the first circulation circuit of the heat medium including the first circulation pump 3, the use side heat introduced from the hot water tank 6 is provided around the heat dissipation side heat exchanger 5 facing the terminal equipment 4 of the circulation circuit 1. The heat exchanger 7 is located in a double pipe structure, and the second circulation circuit 8 connecting the hot water tank 6 and the use side heat exchanger 7 has a second circulation pump 9 and heat radiation arranged in a desired room or the like. The container 10 is connected. Further, the relief hose 1 connected through a pressure adjusting valve 11 which is a two-way valve provided on the upper part of the hot water tank 6.
2 is a pipe leading to the inner bottom of the drain tank 13 arranged in parallel. The drain tank 13 is provided with a lower overflow port 14 on the lower side and an upper overflow port 15 on the upper side, and is equipped with a water level detector 16 composed of a float switch or a water level detecting electrode near the upper overflow port 15. Reference numeral 17 denotes a drain hose connected to the lower overflow port 14, and a water level adjusting cap 18 is arranged at the lower end of the drain hose. 19 is the upper overflow port 15
Is an overflow hose connected to. Reference numeral 20 is a water filled water injection pipe provided with a check valve 21 for water filling, which is branched and connected to a part of the second circulation circuit 8 coming out of the hot water tank 6.
Reference numeral 22 is a thermal valve provided in the first circulation circuit 1. Reference numeral 23 is a freeze-prevention bimetal provided in the second circulation circuit 8.

The operation will be described below. First, when water a is injected into the second circulation circuit 8 including the hot water tank 6 of the heating device, the water injection port 20a of the water injection pipe 20 is injected.
More pressure pump (not shown) is used. The water a passes through the check valve 21 and the entire second circulation circuit 8 and the hot water tank 6.
Accumulate in. In this case, the water a filled in the hot water tank 6
A part of the gas flows out from the pressure adjusting valve 11 into the drain tank 13, and when it flows out from the lower overflow port 14 below this, the tank is full and water injection is stopped. However, the water level adjusting cap 18 at the end of the drain hose 17 connected to the lower overflow port 14 is closed when the water injection is completed.

Here, if the heat source side heat exchanger 2 is heated by the heat exchange by the heat source side heat medium in the heating operation, the heat source side heat exchanger 5 which is a part of the first circulation circuit 1 is located at the position of the heat radiation side heat exchanger 5. The water a of the use side heat exchanger 7 of the circulation circuit 8 of 2 is heat-exchanged to become heating water and is accumulated in the hot water tank 6, and
A predetermined room is heated by the heat radiated from the radiator 10.
In addition, the heating water that is heated and expanded during heating is controlled by the pressure control valve 1.
1 is opened and the water is temporarily discharged to the drain tank 13 side. Further, when the heating water in the heating circuit 8 contracts due to cooling, the water on the drain tank 13 side returns. At this time, the water level detector 16 does not operate because the drain tank 13 has a small amount of water.

However, the heat radiation side heat exchanger 5 which is a double tube.
In the water-water heat exchange of the use-side heat exchanger 7, the heat exchanger 5 is often eroded, and the heat transfer medium (heating water) is pierced and pressurized in the pipeline to the use-side heat exchanger 7 side. May be leaked. Therefore, when the amount of water in the warm water tank 6 increases, the pressure adjusting valve 11
Opens to let water flow from the drain hose 12 to the drain tank 13. In this case, since the drain hose 17 side at the lower end of the drain tank 13 is blocked, the drain tank 1
When the water level of No. 3 increases and reaches the upper water level detector 16, the water level detector 16 operates and issues a predetermined alarm (buzzer), and the first circulation pump 3 and the second circulation pump 9 associated with the operation and The thermal valve 22 is stopped. The leaked water is discharged from the upper overflow port 15 to the outside of the machine.

[0012]

As described above, the hot water heating apparatus of the present invention can be used by providing the overflow port in the drain tank connected to the hot water tank for storing the heating water and by arranging the water level detector in the vicinity of the overflow port. Even if the heat medium (water) leaks to the user side heat exchanger due to a hole (so-called pinhole) failure in the heat dissipation side heat exchanger built into the side heat exchanger, the water level in the drain tank attached to the hot water tank The detector can detect the inflow of water and immediately issue an alarm or stop the circulation pump to ensure the safety of the device.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention.

FIG. 2 is a front view of a main part of the same product.

[Explanation of symbols]

 1 Heat Medium Circulation Circuit 2 Heat Source Side Heat Exchanger 3 First Circulation Pump 5 Radiation Side Heat Exchanger 6 Hot Water Tank 7 Utilization Side Heat Exchanger 8 Second Circulation Circuit 9 Second Circulation Pump 10 Radiator 11 Pressure Adjustment valve 13 Drain tank 14 Lower overflow port 15 Upper overflow port 16 Water level detector

Claims (1)

[Claims] 1. A use in which a circulation circuit for a heat medium comprising a first circulation pump, a heat source side heat exchanger and a heat radiation side heat exchanger, a hot water tank, a second circulation pump and the heat radiation side heat exchanger are built in. Circulation circuit of hot water consisting of side heat exchanger and radiator,
The drain tank, which is connected to the hot water tank via the pressure adjusting valve and has an overflow port, and the water level detector for detecting the water level near the overflow port in the drain tank are provided, and based on the signal of the water level detector. A hot water heating system characterized by issuing an alarm.