JPS58120089A - Hot-water supplying machine - Google Patents

Abstract

PURPOSE:To enable to prevent mixing of refrigerant medium or the like into supplying hot-water at the time of water leakage by a method wherein the water leakage is detected by the electric conduction of a detecting ring attached to the tube equipped with water leakage detecting grooves through an insulating ring, in a heat exchanger for supplying hot-water in a refrigerating cycle. CONSTITUTION:Gas of high-temperature, high-pressure refrigerant medium from a compressor heats the water for supplying hot-water in the heat exchanger 2 for supplying the hot-water. In this heat exchanger 2, the inner tube 10-1 of the tube 10 equipped with the leakage detecting grooves is utilized for the path of water for supplying hot-water while the path of the refrigerant medium is formed by the outer tube 10-4 and the outside tube 11 of the tube 10 equipped with the grooves. When water leakage is caused by the errosion of the inner tube 10-1, leaked water flows down through the grooves 10-5 and is collected in the depression of the detecting ring 26 facked to the inner tube 10-1 through the insulating ring 25, then, the detecting terminals 27-1, 27-2 of the outer tube 10-4 and the detecting ring 26 are conducted, the switch 27-3 for the leakage detector 27 is operated to stop the compressor and, thus, prevents the mixing of the refrigerant medium or the like. In the case, the detecting ring 26 is meshed with and secured to the groove 10-2 of the inner tube 10-1 at the meshing part 25-1 of the insulating ring 25, therefore, is secured surely.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water heater that detects puncture of a heat exchanger for hot water supply due to corrosion or external factors and prevents refrigerant and frozen oil from getting mixed into hot water supply water. It is.

Conventionally, many hot water heaters have been made of copper on the water flow path side of the water heat exchanger of the heat pump type chilling unit for air conditioning, and the heat exchanger tubes on the hot water side are susceptible to surface corrosion such as mechanical corrosion and electrolytic corrosion due to hot water supply, as well as external factors. (e.g. vibration, impact) etc. may cause the hot water supply heat exchanger to become punctured, and the refrigerant in the heat pump refrigerant circuit and refrigeration machine oil may get mixed into the hot water supply water. was there.

For this reason, there have been methods such as increasing the inner thickness of the heat exchanger tubes of heat exchangers for hot water supply, but these methods merely delay the occurrence of punctures and are 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 the drawings. FIG. 1 is a refrigerant cycle diagram of a water heater according to the present invention,
(January compressor, (2) is a heat exchanger for hot water supply, inside of which a leak detection grooved tube is inserted. (3) is a throttling device, (4) is a non-use side heat exchanger. exchanger (evaporator),
(5) is air blowing to the non-use side heat exchanger (4), each of which is connected to a refrigerant pipe to constitute a well-known refrigeration cycle.

FIG. 2 is a detailed view of the leak detection grooved tube (6) inserted into the hot water supply heat exchanger (2). In the M2 diagram, (10-1) is a groove with a U-shaped cross section on the outer periphery (10-2)
The inner tube is made by processing a large number of strips, and there is a hot water supply flow path (
1G-8) is formed. (10-4) is an outer tube into which the inner tube (1G-4) is inserted;
) and the inner pipe (10-1) create a leak detection groove (10-5).
) is formed. In addition, the leak detection grooved pipe GO is inserted into the outer pipe (B) of the hot water supply heat exchanger (2), and both pipes (
A refrigerant flow path (10-6) is formed between (b) and (b). An outer tube (10-4) 9 is attached to one end of the inner tube (10-2).
A protruding part (lo-7) is formed which protrudes outward from the part.

Figure 8 is a detailed view of both ends (6) of the hot water supply heat exchanger (2), and (2-1) and (2-2) are the compressor (1).
and a refrigerant side outlet to the throttling device (3), which are provided in the outer pipe CI. In addition, the outer tube (
Both ends of b) are drawn and fixed airtightly on the leakage detection grooved tube aQ, and the refrigerant flow passage (10-6) is closed.
ing.

Also, one end of the inner pipe (1G-1) of the leak detection grooved pipe CIO is connected to the hot water outlet pipe □□□. Leak detection groove (10-
2) is closed by a closing member such as a solder, and the other end is closed by a sekiguchi. At the other end, the hot water outlet pipe is connected to the inner pipe (10-1) of the leak detection grooved pipe αQ by brazing or the like. ) is located on the protrusion (1G-7) side of the inner tube (ZO-1) as shown in Figure 4.
The meshing part (25-1) that meshes with the groove (10-2) of
) to an insulating ring made of electrically insulating material with Ft)
The outer tube (10-4) is fixed to the inner tube so as to form a gap (A) with the end surface. (c) is an insulating ring (2)
A detection ring made of a conductive material in the shape of a cap fixed to the outer circumference of the body of the detection ring (26-
1) is provided so as to cover the gap (A). (Foundation)
is a water leak detection device that uses the conductivity of hot water supply, and has a detection @ C2'l-1) C2'1-2) connected to the outer pipe (10-4) and the detection ring). Detection groove (10
-5) If there is a water leak inside the switch (1) as is well known,
27-11) is activated.

Next, the operation will be explained. In Figure 1, the compressor (1
The high temperature, high pressure gas refrigerant discharged from the hot water supply heat exchanger (2) exchanges heat with the hot water supply water, raises the temperature of the hot water supply water, and is condensed to become a liquid refrigerant. And diaphragm 'tit
(3) The pressure is reduced from f, evaporated by the non-use side heat exchanger (4), and returned to the compression ail (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 caused by hot water and electrolytic corrosion, the erosion occurs in the leakage detection groove (10-2). At the point when the water reaches the leakage detection groove (10-5), the hot water flows into the leakage detection groove (10-5). However, since one end of this groove (10-5) is closed, it leaks to the other open end and accumulates inside the detection ring (E), causing an even gap between the outer tube (1G-4) and the detection ring (E). The water leakage detection device (support) detects this and operates the switch (27-1) to stop the operation of the compressor (1).

Therefore, the operation of the compressor (υ) can be stopped without refrigerant, freezing machine oil, etc. flowing into the hot water supply water.
The same holds true for Eζ when cracks occur on the hot water supply side due to external factors (vibration and impact).

Furthermore, the detection end 10,000 (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 a water leakage occurs, the water leakage is detected by a water leakage detection device via the leakage detection groove. As a result, the operation of the refrigeration cycle can be stopped, and even in the event of water leakage, it is possible to prevent refrigerant and refrigeration machine oil from getting mixed into the hot water supply water, thereby solving sanitary problems. In addition, the detection ring is fixed by meshing with the groove of the inner tube 3 and is fixed to the inner tube via an electrical insulating material, so the fixation is reliable and the structure is simple.
The arrangement and workability are also improved.

[Brief explanation of drawings]

The first factor is the refrigeration cycle diagram of the water heater according to the present invention. FIG. 2 is a detailed view of the leak detection grooved tube, FIG. 8 is a detailed view of the same <1#5 Yukawa heat exchanger, and FIG. 4 is a detailed perspective view of the detection ring portion. In addition, in FIG. 1, the same reference numerals indicate the same or corresponding parts. In the diagram, (2) is a heat exchanger for hot water supply, and the symbol (2) is a leak detection grooved pipe.
(10-1) is the inner pipe, (10-5) is the leak detection groove,
(10-8) is an outer tube, @ is an insulating ring, (A) is a detection ring, and @ is a water leak detection device. Agent Makoto Kuzuno - Figure 1 Figure 2

Claims (1)

[Claims] In a system that uses a refrigeration cycle to supply hot water, leakage caused by having one end of an inner tube with a plurality of grooves on its outer periphery protrude from the end of the outer tube and inserting the inner tube into the outer tube. Insert the detection grooved tube into the outer tube as the inner tube,
A heat exchanger comprising a hot water supply flow path in the inner pipe and a refrigerant flow path between the inner pipe and the outer pipe, the heat exchanger being engaged with a groove in a protrusion of the inner pipe protruding from the end of the outer pipe. A fixed electrical insulating material, a conductive detection ring fixed to the outer periphery of the electrical insulating material, and a detection end are connected to the leak detection grooved pipe and the outer pipe, respectively, and the above-mentioned supply A water heater equipped with a water leakage detection device that operates by utilizing the conductivity of the hot water supply water when pumped water leaks into the leakage detection groove.