JPS621583Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat exchange device used in a hot water supply system.

Conventionally, as this type of heat exchange device, for example, as shown in FIG. 2, a condenser 2 is connected to a refrigerant compressor 1.
A heater 4 connected to an auxiliary heat source 3 such as a boiler or solar is built into a tank 5, and city water is supplied to a pressure reducing valve 6.
The water is circulated through the tank 5 through the tank 5, heated in the tank by the condenser 2 and heater 4, and then taken out from the hot water pipe 7 and used as hot water (for drinking).

However, in such a device, potable hot water is circulated and generated in the tank 5, so this tank must be made of a corrosion-resistant material such as stainless steel, and the water pressure (tap water pressure) of the city water is the same. If the water flows into the tank 5, the condenser 2 and heater 4 cannot withstand the water pressure, so it is necessary to reduce the water pressure with the pressure reducing valve 6, which has the disadvantage of increasing manufacturing costs. In addition, the liquid refrigerant tends to accumulate in the condenser 2, and the water in the tank 5 cannot be efficiently heated by the condenser 2 and the heater 4.

The present invention was developed in view of the above, and its purpose is to provide a heat exchange device that is inexpensive and has high heat exchange efficiency. In order to achieve this purpose, this project uses a refrigerant condensing pipe as the inner pipe, with the inlet pipe connected to the upper part and the outlet pipe to the lower part, and the water flow with the inlet pipe connected to the lower part and the outlet pipe to the upper part. A coil-shaped double-tube heat exchanger with a general purpose pipe as the outer tube, this heat exchanger built-in, and an inlet tube into which high-temperature heat source water is introduced at the top, and an outlet tube at the bottom. tank and
This structure consists of an air vent pipe installed at the top of the tank.With this structure, the high-temperature heat source water can be used as a closed circulation circuit with anti-corrosion material, so the tank can be made of inexpensive iron material and the pipe for water distribution can be used. Because it has a coiled shape with pressure resistance, there is no need for a pressure reducing valve, and there is no need to worry about liquid refrigerant accumulating in the refrigerant condensation pipe.In addition, the water flowing through the water distribution pipe is heated in counterflow from both the inside and outside, so there is no need for a pressure reducing valve. Exchange efficiency can be obtained.

The embodiment of the present invention will be described below based on FIG. 1. Reference numeral 8 is provided with an inlet pipe 9 at the top through which high-temperature, high-pressure refrigerant is introduced, and an outlet pipe 10 through which the condensed liquid refrigerant is led out at the bottom. Condensing pipe for refrigerant, 1
Reference numeral 1 denotes a city water distribution pipe having an inlet pipe 12 at the bottom through which low-temperature city water is introduced directly without a pressure reducing valve, and an outlet pipe 13 at the top through which the water is heated to a high temperature and taken out as hot water. It is formed into a coil shape as a double pipe heat exchanger 14 with the latter pipe 11 as an outer pipe.

Reference numeral 15 denotes an iron tank with a built-in double-pipe heat exchanger 14, and an inlet pipe 16 at the top into which high-temperature heat source water from an auxiliary heat source such as a boiler or solar is introduced, and at the bottom an inlet pipe 16 for returning the water to the auxiliary heat source. An outlet pipe 17 is provided, and these pipes 16, 17, an auxiliary heat source, and a circulation pump (not shown) form a closed circuit for circulating high-temperature heat source water containing a rust preventive agent.

18 is an air vent pipe installed at the top of the tank 15;
This is to exhaust air mixed in high-temperature heat source water.

Therefore, the city water in the distribution pipe 11 is efficiently heated from the inside by the heat of condensation of the refrigerant in the condensing pipe 8, from the outside by the high temperature heat source water in the tank 15, and from both inside and outside. By flowing the liquid refrigerant downward, it is possible to prevent the liquid refrigerant from accumulating in the condensing pipe 8. At the same time, city water is allowed to flow from below to above as shown by the dashed arrow to face the refrigerant flow, and high-temperature heat source water is allowed to flow as shown by the dashed-dotted arrow. Higher heat exchange efficiency can be obtained by flowing from above to below and crossing it with city water.

In addition, since the tank 15 with a large internal volume is used and the air vent pipe 18 is provided at the upper part of the tank 15, air can be easily vented from the closed circulation circuit of the high temperature heat source water. The compressive strength of the material can be reduced.

Since the present invention is configured as described above, it is possible to obtain a heat exchange device that is directly connected to the water supply without the need for a pressure reducing valve, and the tank used can be made of inexpensive iron material.Moreover, the liquid refrigerant is not accumulated in the refrigerant condensation pipe. Since the water flowing through the water distribution pipe is heated in counterflow from both the inside and outside, high-temperature hot water can be obtained instantly, and air can be easily removed from the high-temperature heat source water, which is extremely beneficial.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a heat exchange device according to an embodiment of the present invention, and FIG. 2 is a schematic diagram showing a conventional heat exchange device. 8... Refrigerant condensation pipe, 11... City water distribution pipe, 14... Double pipe heat exchanger, 15... Tank, 18... Air vent pipe.

Claims (1)

[Scope of utility model registration request] The inner tube is a refrigerant condensation pipe with an inlet pipe connected to the upper part and an outlet pipe connected to the lower part, and the outer pipe is a water distribution pipe with the inlet pipe connected to the lower part and the outlet pipe connected to the upper part. A double-pipe heat exchanger, a tank that houses this heat exchanger, has an inlet pipe at the top where high-temperature heat source water is introduced, and an outlet pipe at the bottom, and a tank installed at the top of this tank. A heat exchange device equipped with an air vent pipe.