JPS6113550B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single/double effect absorption refrigerator, and aims to provide economical and stable operation depending on the heat source and load.

In other words, one absorption chiller operates as a single effect when using a low temperature heat source such as solar hot water or low temperature water, and operates as a double effect when using a high temperature heat source such as city gas, kerosene combustion, or high temperature water. This aims to effectively utilize the heat source by operating in combination with single effect.

The present invention will be described below with reference to embodiments shown in the drawings. 1 is a direct-fired high-temperature generator that heats and separates the refrigerant from the intermediate liquid, and has a combustion heating chamber 2 for a high-temperature heat source such as city gas or kerosene, and exhaust heat pipes 3, 3, etc. from the heating pipes, and 4 is the high-temperature generator A first low-temperature generator heats and separates a dilute refrigerant using the refrigerant vapor sent out from the generator 1 as a heat source, and a cooler 5 condenses and cools the refrigerant flowing from both generators 1 and 4 using a cooler 6. 7 is an evaporator that obtains cold water for cooling from a water cooler 8 by using latent heat when the liquid refrigerant from the condenser 5 is dispersed and vaporized; 9 is an evaporator that uses the high temperature generator 1 to collect the refrigerant; The absorbers 10 and 11 are low-temperature absorbers, which maintain the inside of the evaporator 7 at a low pressure and continuously supply cold water by scattering a concentrated liquid separated from the evaporator and absorbing the refrigerant vapor inside the vessel. A heat exchanger and a high-temperature heat exchanger, which include a refrigerant field trachea 12, a refrigerant downflow pipe 13, a refrigerant circulation line 16 with a refrigerant pump 14, a dilute liquid line 17 with an absorption liquid pump 16,
A dual-effect absorption refrigeration cycle is constructed by connecting an intermediate liquid pipe 19 and a concentrated liquid pipe 20 with a solution pump 18. Note that a dual-effect absorption refrigeration cycle may be configured without providing the high-temperature heat exchanger 11 as shown in the diagram in the dilute liquid pipe line 17 and the intermediate liquid pipe line 19.

21 is a hot water heat exchanger provided between the high temperature generator 1 and the refrigerant vapor pipe 12.

Reference numeral 22 denotes a second low-temperature generator which uses a low-temperature heat source such as solar hot water as a heat source and is provided upstream of the diluted liquid with respect to the first low-temperature generator 4, and when the generator is in single-effect operation, an intermediate liquid pipe is connected to the second low-temperature generator. A bypass pipe 24 having an on-off valve 23 provided between 19 and the concentrated liquid pipe 20
When used in combination with dual effect operation, the on-off valve 23 is closed and on-off valves 25 and 26 provided in the intermediate liquid pipe line 19 and the concentrated liquid pipe line 20 are opened, respectively.

Next, the operation will be explained.

B Single-effect operation In this case, the on-off valves 25 and 26 are closed, the on-off valve 23 is opened, the solution pump 18 is stopped, and the second low-temperature generator 2 is supplied with operating heat from the low-temperature heat source.
2. A refrigeration cycle is constituted by the condenser 5, the evaporator 7, the absorber 9, and the low-temperature heat exchanger 10, and cold water for cooling is obtained from the water cooler 8.

(b) Double-effect operation In this case, the on-off valves 25 and 26 are opened, the on-off valve 24 is closed, and the solution pump 18 is operated, and when the operating heat source is supplied from the high-temperature heat source, the aforementioned double-effect absorption refrigeration cycle is configured, and the water cooler 8 supplies cold water for cooling, and hot water heat exchanger 21 supplies hot water for temperature control. In this case, the second low temperature generator 22 may be operated to perform a combined single-effect and double-effect operation.

In addition, when heating with hot water, the on-off valve 25,
26 and close the on-off valve 27 provided in the refrigerant steam pipe 12 to close the high temperature generator 1 and the hot water heat exchanger 2.
The refrigerant is circulated between the hot water heat exchanger 2 and
1. Produce hot water.

As described above, the present invention provides a dual-effect absorption refrigerator configured by appropriately connecting a high temperature generator, a first low temperature generator, a condenser, an evaporator, an absorber, and a heat exchanger with the first low temperature generator. A second low temperature generator using a low temperature heat source is arranged on the upstream side of the diluted liquid with respect to the container, and
In the case of single effect, the dilute liquid flowing out from the absorber bypasses the high temperature generator and flows into the second low temperature generator, and in the case of double effect, the dilute liquid flowing out from the absorber flows into the first low temperature generator and the solution pump. Since it is designed to flow into the high temperature generator via
One absorption chiller can be easily selected for single effect or double effect depending on the heat source and load, making it possible to use energy effectively. In addition, the refrigerant can be separated from the diluted liquid at a low temperature, and the pressure generated on the high temperature side can be lowered.

[Brief explanation of the drawing]

The drawing is a circuit diagram of a single/double effect absorption refrigerator according to the present invention. 1...High temperature generator, 4...First low temperature generator, 9
...absorber, 10 ... low temperature heat exchanger, 11 ... high temperature heat exchanger, 18 ... solution pump, 24 ... bypass pipe line, 22 ... second low temperature generator.

Claims (1)

[Claims] 1. In a dual-effect absorption refrigerator configured by appropriately connecting a high-temperature generator, a first low-temperature generator, a condenser, an evaporator, an absorber, and a heat exchanger with piping, the upstream of the diluted liquid to the first low-temperature generator A second low-temperature generator using a low-temperature heat source is arranged on the side, and when the single effect is used, the dilute liquid flowing out from the absorber bypasses the high temperature generator and flows into the second low temperature generator, and when the double effect is used, the diluted liquid flows into the second low temperature generator. A single/double effect absorption refrigerating machine, characterized in that the dilute liquid flowing out from the absorber flows into a high temperature generator via a first low temperature generator and a solution pump.