JPH0357390B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot water supply system using an absorption heat pump in a bath system using an absorption heat pump that utilizes waste water heat from the bath itself.

Recently, in view of the economical use of energy, so-called energy-saving hot water supply systems for bathhouses (commercial bathhouses) and the like have been considered. For example, as previously indicated by the applicant (Utility Application No. 57-177112),
Waste hot water discharged from the bathtub and hot water is stored in a tank, and this waste hot water is passed through appropriate means to become the heat source water for the evaporator of the absorption heat pump, and the hot water generated in the absorber and condenser of the absorption heat pump section is transferred to the bathtub. It can also be used as a heat source for the heat storage tank. In this case, the absorber 3 and condenser 4 facing the absorption heat pump 1 are connected to a single hot water circulation path (one system).
A series connection configuration is adopted (see Figure 1).

In this way, if hot water is used in one system, applications with different temperature levels cannot be handled without devising appropriate means outside the machine, and in order to operate the boiler with only the condenser system, an absorption heat pump machine is required. It had a defect that required special equipment such as a switching valve.

In view of the above-mentioned circumstances, the present invention provides a hot water supply system that provides two different hot water systems and a simple boiler operation.

That is, the present invention leads a hot water circulation path piped to an absorber of an absorption heat pump equipped with an evaporator facing a heat exchanger that leads waste water to a heat exchanger connected to a bathtub,
On the other hand, the hot water circulation path has a two-system hot water circulation path that leads the hot water circulation path of the condenser that obtains hot water at a relatively higher temperature than the hot water in the hot water circulation path to a hot water storage tank that serves as hot water.

Hereinafter, the present invention will be described with reference to drawings of embodiments.

1 is an absorption heat pump equipped with an evaporator 2, an absorber 3, a condenser 4, and a generator 5;
On the side, a heat source path 13 facing a heat exchanger 12 connected via a hair catcher 9, a pump 10, and a filter 11 to a tank 8 storing waste hot water from the bathtub 6 and rising hot water 7 is piped. A hot water circulation path 14 connected to the absorber 3 leads to a heat exchanger 15 that can raise the temperature of the bathtub 6 itself. On the other hand, a part of the hot water circulation path 16 connected to the condenser 4 is guided to the hot water storage tank 17,
This is done by raising the temperature of the hot water storage tank 17. In other words, the hot water systems for the absorber 3 and the condenser 4 are separate systems. 18 is a water supply tank that supplies water to the hot water tank 17 and the bathtub 6; 19 is a pump disposed in the heat source path 13; 20 is a pump disposed in the hot water circulation path 14; 21 is a pump disposed in the hot water circulation path 16; 22 is a bathtub This pump is disposed in the heating path 23 between the heat exchanger 6 and the heat exchanger 15.

To explain this effect now, the bathtub 6 and the rising bath 7
The waste hot water discharged from the tank is stored in a tank 8, passed through a hair catcher 9, a filter 11, etc., and then guided to a heat exchanger 12, where the heat is absorbed as a heat source for the evaporator 2 of the heat pump 1. shall be.

Here, due to the heat input from the evaporator 2 and the combustion heat input, each pipe outlet of the hot water circulation path 14 and the hot water circulation path 16 of the absorber 3 and condenser 4 of the absorption heat pump 1 becomes hot water, and this hot water is heated to the bathtub respectively. This serves as a heat source for the 6 side and the hot water tank 17 side. In this case, since the hot water circulation paths 14 and 16 of the absorber 3 and the condenser 4 are independent piping (systems), separate temperatures can be obtained from each.

For example, when hot water from the bathtub 6 at 43°C is discharged, the hot water at the outlet of the hot water circulation path 14 of the absorber 3 becomes 55°C, and the heating path 2 passes through the heat exchanger 15 toward the bathtub 6.
It will be able to supply hot water at 45 degrees Celsius. The hot water circulation path 14 that passes through the heat exchanger 15 returns to the absorber 3 as hot water at 50°C.

On the other hand, in the condenser 4 whose temperature is relatively higher than that of the absorber 3, the water becomes 60°C and is guided to the hot water storage tank 17 through the hot water circulation path 16.
Raise the temperature to 50℃. However, even when there is no waste heat in the condenser 4, hot water can be secured by adding fuel to the generator 5, and the hot water temperature in the hot water storage tank 17 can be maintained.

If there is no waste hot water, the pumps 10, 19, and 20 can be stopped and the absorption heat pump 1 can continue to operate. Therefore, the transition to boiler operation is easier than in the past.

As mentioned above, in the hot water supply system using the absorption heat pump of the present invention, the absorber and condenser hot water systems of the absorption heat pump are separated and independent, and the absorber system supplies hot water for heating the bathtub, and the condenser system supplies hot water to the absorber system. By supplying hot water for heating the hot water tank, two systems of hot water supply are possible.
In addition, when there is no more waste heat to be recovered, simply stopping the hot water pump in the absorber system eliminates troubles such as crystallization of the absorption liquid and freezing of the refrigerant, and allows boiler operation using the condenser. It has the effect of being able to supply hot water. Although the above has been described as an example of a bath system, it is generally applicable to other uses such as space heating and hot water supply as an absorption heat pump other than baths, and a wide range of applications can be considered.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an absorption heat pump section in a conventional hot water supply system, and FIG. 2 is a system diagram of the present invention. 1...absorption heat pump, 2...evaporator, 3...
...absorber, 4...condenser, 5...generator, 6...
Bathtub, 7... Rising hot water, 12... Heat exchanger, 13...
...Heat source path, 14...Hot water circulation path, 15...Heat exchanger, 16...Hot water circulation path, 17...Hot water storage tank.

Claims (1)

[Claims] 1 The waste water heat from the bathhouse is used as a heat source for an absorption heat pump equipped with an evaporator, absorber, generator, and condenser, and the hot water obtained in the absorber and condenser is exchanged to heat the bathtub and hot water. In a bathroom system using an absorption heat pump, the hot water circulation path connected to the absorber of the absorption heat pump section is led to the heat exchanger facing the bathtub, and the hot water circulation path of the condenser, which is hotter than the hot water circulation path, is connected only to the hot water tank. A hot water supply system using an absorption heat pump, which is characterized by having two hot water circulation paths so as to lead to.