JPH0577947B2 - - Google Patents

Description

Detailed Description of the Invention The present invention enables switching operation between a dual-effect absorption chiller and an absorption heat pump, thereby effectively utilizing a low-temperature level heat source to provide cold water for air conditioning in the summer and cold water for air conditioning in the winter. The present invention relates to an absorption chiller/heater that can stably supply hot water for heating with a single absorption chiller.

Embodiments of the present invention will be described below with reference to the drawings. 1 is a gas burner capable of heating an absorbing liquid (dilute liquid or intermediate liquid) whose concentration has been reduced by absorbing a refrigerant such as water in two stages, etc. 3 is a separator that separates the refrigerant from the absorption liquid pumped together with the gaseous refrigerant; 4 is the high temperature generator A low-temperature generator includes a heater 5 using gaseous refrigerant generated in the reactor 1, and vaporizes and separates the refrigerant from an absorption liquid flowing from the high-temperature generator 1 or an absorber described later, and 7 is a fluid condensation heat exchanger. 8 is a built-in condenser that condenses and liquefies the gaseous refrigerant gas flowing into the vessel; 9 guides the liquid refrigerant flowing from the condenser 7 to the low-pressure vessel 10 to extract latent heat of vaporization from the fluid in the vaporization heat exchanger 11; The evaporator 6 is a generator, which distributes the concentrated liquid in the generators 1 and 4, absorbs the absorption reaction heat together with the vaporized refrigerant in the absorption heat exchanger 9, and continuously vaporizes it in the evaporator 9. Absorber that maintains its functionality,
13 is the generator 1 which absorbs the refrigerant and generates the diluted diluted liquid.
A low-temperature pump 14 exchanges heat between the high-temperature concentrated liquid flowing into the absorber 6 and the low-temperature diluted liquid that returns from the absorber 6 to the generator 1 to preheat the diluted liquid and pre-cool the concentrated liquid. Heat exchanger 15 is a high-temperature heat exchanger that exchanges heat between the dilute liquid and the concentrated liquid that return to the high-temperature generator 1. Pipes 22, 23, concentrated liquid pipe 24,
They are connected by side pipes 25 and 26 to form a closed circulation cycle of the refrigerant and the absorption liquid.

27 has an overflow opening 28, and a heater 2 whose heat source is low-temperature heat source water (hereinafter referred to as low-heat source water) such as hot water heated by solar heat.
9 is a hot water generator that heats and separates the refrigerant from the absorption liquid; 30 is a hot water generator 27 that uses the heat of the liquid refrigerant flowing from the low temperature generator 4 to the condenser 7 from the absorber 6;
a heat recovery device designed to heat the dilute liquid flowing into the
31, 32, and 33 are all provided in the refrigerant pipe 19, the side pipe 26, and the diluted liquid pipe 21 so as to be closed when hot water is supplied, which will be described later, and opened when cold water is supplied. 34 is a shut-off valve when hot water is supplied. A release valve 35 is disposed in the refrigerant pipe 18 so as to be opened and closed when cold water is supplied; reference numeral 35 is a control valve 36 disposed in the side pipe 26;
is a three-way switching valve disposed between the high temperature heat exchanger 15 and the low temperature heat exchanger 14.

When cold water is supplied by the absorption cold/hot water device having such a configuration, if sufficient low heat source water is not available to operate the hot water generator 27, the valves 31 and 33 are opened and the valves 32, 34, and 35 are closed. When the three-way valve 36 is placed in the state shown in FIG. 19, low temperature generator 4, heat recovery device 30, condenser 7
The absorption liquid is distributed in the evaporator 9 through the
The fluid (for example, cold water) circulating through the vaporization heat exchanger 11 can be cooled and used for air conditioning.

In such an operation, cooling water is flowed into the condensing heat exchanger 8 and the absorption heat exchanger 12, and when low heat source water is available even though it is insufficient, the heater 29 is
Since the hot water generator 27 can generate refrigerant by sending low heat source water to the hot water generator 27 and setting the three-way valve 36 to the state shown in FIG. 2b, the amount of fuel gas used in the high temperature generator 1 can be reduced. Therefore, even if the gas burner 2 is set to weak combustion, the same cold water supply function as in the case of strong combustion can be maintained.

In addition, when low heat source water is sufficiently obtained, the three-way valve 36 is set as shown in FIG.
By closing the open valve 33,
All the dilute liquid from the absorption liquid pump 13 flows into the hot water generator 27 through the liquid pipe 25, and the refrigerant separated in the generator 27 flows from the condenser 7 to the evaporator 9, while the absorption liquid overflows. In order to flow into the absorber 6 via the opening 28, the low temperature generator 4, and the low temperature heat exchanger 14, the vaporization heat exchanger 1
A cooled fluid is obtained from 1.

Note that since no refrigerant flows into the heater 5 of the low-temperature generator 4, the generator 4 is virtually inactive, and 37 indicates the flow of gaseous refrigerant into the generator 4 side. It is a resistance plate that prevents

Next, when there is a demand for high-temperature fluid such as hot water rather than cooling load such as winter or intermediate season, valves 32 and 3
4, 35 open, valves 31, 33 closed, three-way valve 3
When the absorption liquid in the high temperature generator 1 is heated with the gas burner 2 in the state shown in FIG. The refrigerant flows through the condenser 7, where the refrigerant heats the fluid flowing through the condensing heat exchanger 8, while the absorption liquid separated in the separator 3 flows through the liquid pipe 22, the high temperature heat exchanger 15, and the side pipe 26. ', low temperature heat exchanger 1
4 to the absorber 6 and heats the fluid flowing through the absorption heat exchanger 12.
The two hot waters can be combined and supplied to the outside of the machine.

The refrigerant liquid that has flowed into the evaporator 9 from the condenser 7 is subjected to so-called heat pump operation using the water circulating through the vaporization heat exchanger 11 as a heat source, and when low heat source water is obtained, it is also transferred to the vaporization heat exchanger 11 when low heat source water is obtained. It is also possible to improve the hot water supply capacity of the device by circulating low heat source water.

It should be noted that the valve 32 is opened when there is no low heat source water so as not to interfere with the circulation of the refrigerant.

In this manner, the absorption chilled/heated water apparatus of the present invention opens the discharge side of the absorption liquid pump of the dual-effect absorption chiller through the valve that opens during the dual-effect cold water supply operation using heated fuel and low-temperature heat source water. Connected to the hot water generator and high temperature generator via a single-effect valve that opens when cold water is supplied using only low-temperature heat source water, and to the high temperature generator via a valve that opens when hot water is supplied. Therefore, we simplified the piping structure from the absorber to the high-temperature generator and the hot water generator, and also reduced heating fuel consumption during dual-effect operation, as well as reducing heating fuel consumption during single-effect operation. This makes it possible to supply cold and hot water with significantly reduced consumption of heating fuel.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of the device of the present invention, Fig. 2 a, b,
3c is a diagram showing the opening and closing states of the valve under each operating condition. 1... High temperature generator, 4... Low temperature generator, 6...
Absorber, 7... Condenser, 9... Evaporator, 13...
Absorption liquid pump, 31, 32, 33, 34, 35...
...Release valve, 36...Three-way valve.

Claims (1)

[Claims] 1 High temperature generator using heating fuel such as gas as a heat source,
Low-temperature generators, hot water generators whose heat source is low-temperature heat source water heated by solar heat, etc., condensers, evaporators,
The discharge side of the absorption liquid pump that connects the absorber with a diluted liquid pipe, intermediate liquid pipe, cold soot pipe, etc. to form a circulation cycle of the absorption liquid and cold soot, and also returns the diluted liquid from the absorber to each generator. is a valve that is opened during dual-effect cold water supply operation using heating fuel and low-temperature heat source water to the hot water generator and high-temperature generator, and opened during single-effect cold water supply using only low-temperature heat source water. An absorption cold/hot water device characterized in that it is connected to a hot water generator via a valve that opens when hot water is supplied, and to a high temperature generator via a valve that opens when hot water is supplied.