JPS58120090A - Hot-water supplying machine - Google Patents

Abstract

PURPOSE:To enable to detect water leakage by a simple constitution by a method wherein the water leakage, flowed out of a tube equipped with leakage detecting grooves, is detected by the conduction of a detecting ring attached to the tube an insulating ring, in a heat exchanger for supplying hot-water which is utilizing a refrigerating a refrigerating cycle. CONSTITUTION:Gas of high-temperature, high-pressure refrigerant medium from a compressor heats water for supplying hot-water by the heat exchanger 2 for supplying hot-water. In this exchanger 2, the inner tube 10-1 of the tube 10 equipped with the leakage detecting grooves is utilized for the path of the water for supplying hot-water while the path of the refrigerant medium is formed by by the outer tube 10-4 of the tube 10 equipped with the grooves and an outside tube 11. When the water is leaked from the inner tube 10-1 due to the errosion thereof, the leaked water is flowed out of the end thereof through the groove 10-5. In this case, the detecting ring 26, facked to the outer tube 10-4 through an insulating ring 25, becomes conductive with the outer tube 10-4 due to the water leakage and operates the leakage detector 27 to stop the compressor. Thus, mixing of the refrigerant medium or oil for the compressor into the supplying hot water may be prevented by a simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water heater that detects a puncture of a heat exchanger for hot water supply due to corrosion or external factors, and prevents refrigerant and refrigeration machine oil from entering hot water. be.

Conventionally, most water heaters have been made of copper for the water flow path side of the water heat exchanger of the heat pump type chilling unit for air conditioning. Due to factors such as vibrations and shocks, the heat exchanger for hot water supply may become punctured, and the refrigerant in the heat pump refrigerant circuit and refrigeration machine oil may get mixed into the hot water supply water. There was a pause.

For this reason, there have been methods such as increasing the thickness of the heat exchanger tubes in hot water supply heat exchangers, but this only delays the occurrence of punctures and is not a sufficient countermeasure.

The present invention has been made to eliminate the above drawbacks.

An embodiment of the present invention will be described below with reference to one drawing.

FIG. 1 shows the refrigerant cycle section of the water heater according to the present invention,
(1) is a compressor, and (2) is a heat exchanger for hot water supply, into which a leak detection grooved pipe, which will be described later, is inserted. (3) is the throttle device, (April, non-use side heat exchanger (evaporator),
5) is an air blower that blows air to the non-use side heat exchanger (4), each of which is connected to refrigerant piping to constitute a well-known refrigeration cycle.

Figure 2 is a detailed view of the leak detection grooved tube (LO) inserted inside the hot water heat exchanger (2).In Figure 2, (10-1) has a U-shaped cross section on the outer periphery. Groove (10-2)
It is an inner pipe processed with many strips, and there is a hot water supply flow path (1
0-8) are formed. (10-4) is an outer tube into which the inner tube (10-1) is fitted, and the outer tube (10-4)
and the inner pipe (10-1) and the leak detection groove (10-5).
) is formed. In addition, the leakage detection grooved pipe (6) is inserted into the outer i-tube (b) of the hot water supply heat exchanger (2), and one double-tube (
A refrigerant flow path (10-6) is formed between 10 (b).

Figure 8 is a detailed view of both ends (6) of the hot water supply heat exchanger (2), (2-1) and (2-2) are the refrigerant side inlet from the compressor (1) and the throttling device ( 3), and is provided in the outer pipe (b). In addition, the outer tube (12
) are drawn, and the upper f of the leak detection grooved tube (6) is drawn.
The refrigerant flow path (10-6) is closed. In addition, the inner pipe (leak detection grooved pipe) (one end of the inner pipe (1G-1) of 10 is connected to the hot water outlet pipe (b), and one end of the leak detection groove (1G-2) is equipped with a brazing etc. The closing member lζ is closed [8], and the other end is open. At the other end, the hot water inlet pipe ■ is connected to the inner pipe (1) of the leak detection grooved pipe αQ.
0-1) and is connected by brazing, etc. At the other end of the leakage detection groove (10-2), an insulating ring made of an insulating material is attached to the outer periphery of the end of the outer tube (10-4) as shown in Figure 4. is a detection ring made of a conductive material and designed to protrude slightly outward from the end surface of the outer periphery of the insulating ring (c).

(B) is connected to the outer tube (10-4) and the detection ring).
This is a water leakage detection device that uses the conductivity of hot water and has two detection ends (27-1) and (27-2).
5) If there is a water leak inside the switch (2), as is well known,
7-8) is activated.

The next Eζ operation lζ will be explained. The high-temperature, high-pressure gas refrigerant discharged from the compressor (1) in Fig. Stiff! It becomes a liquid refrigerant. Then, the pressure is reduced by the expansion device (3), evaporated by the non-use side heat exchanger (4), and returned to the compressor (1).

By the way, if the inner surface of the inner pipe (10-1) of the hot water supply heat exchanger (2) is eroded due to surface corrosion such as surface corrosion and electrolytic corrosion caused by the hot water supply, the erosion occurs in the leakage detection groove (10-1). When reaching 2), the hot water is leaking through the leak detection groove (10-5).
lζflown enters. However, since one end of this groove (10-5) is closed and opened, it leaks to the other functioning end and the protrusion (26-1) of the detection ring is exposed to hot water, causing the outer pipe to leak. (10-4) and the detection ring), the water leak detection device (b) detects this, and the switch (27-1
) and stop the operation of the compressor (1).

Therefore, the operation of the compressor (2) can be stopped without refrigerant, freezing machine oil, etc. flowing into the hot water supply water.Also, in the event that cracks occur on the hot water supply side due to external factors (vibration and shock), The same is true for the detection ring (26-1), as the detection ring (26-1) only needs to be exposed to hot water when water leaks, so it is not necessary to provide the protrusion (26-1) for the insulation ring (26-1).
It may be configured flush with. Also, one of the detection ends (27-
1) may be connected to the outer pipe (b).

As described above, according to the present invention, a leakage detection grooved pipe is adopted as an inner pipe of a heat exchanger for hot water supply, and when water leakage occurs, a water leakage detection device is activated via the leakage detection groove (10-2). Since water leakage is detected, the operation of the refrigeration cycle can be stopped, and even in the event of a water leakage, it is possible to prevent refrigerant and refrigeration machine oil from getting mixed into the hot water supply water, thus preventing sanitary problems. It can be solved. In addition, the detection ring is inserted into the outer periphery of the leak detection grooved tube through an electrically insulating member to form the detection section.

The configuration is simplified and workability is improved.

[Brief explanation of the drawing]

FIG. 1 is a refrigeration cycle diagram of the water heater according to the present invention. FIG. 2 is a detailed view of the leak detection grooved pipe, FIG. 8 is a detailed view of the hot water supply heat exchanger, and FIG. 4 is a detailed view of the detection ring. In addition, in FIG. 1, the same reference numerals indicate the same or corresponding parts. In the figure, (2) is a heat exchanger for hot water supply, αQ is a leak detection grooved pipe, (10-1) is an inner pipe, (10-6) is a leak detection groove,
(10-8) is an outer tube, @ is an insulating ring, 2) is a detection ring, and @ is a water detection device. Agent Geshu Shin - Figure 1 Figure 3 Figure 7-3 Sister ↓ Figure 4

Claims (1)

[Claims] A method for producing lead hot water using a refrigeration cycle7,-
(7) ic Then, a groove is formed on the inner surface of the outer tube or the outer surface of the heavy tube, and the inner tube is used as the leak detection grooved tube, which is constructed by inserting the inner tube into the outer tube, as the inner tube. Insert into the outer pipe and connect the hot water flow path to the inner pipe. a heat exchanger forming a refrigerant flow path between the inner tube and the outer tube; a closing member closing one end of the leak detection groove; and the leak detection grooved tube at the other end of the leak detection groove. The outer circumference tζ is attached via an electrical insulating material, and the conductive detection ring and the opening of the detection end are connected to the leak detection grooved t or the outer pipe and the detection ring, and the leak detection A water supply boiler equipped with a water leakage detection device that operates by utilizing isoelectricity of the hot water supply water when the hot water supply water leaks from the detection groove.