JPS6113546B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single/double effect absorption refrigerator, and an object of the present invention is to achieve economical and stable operation by effectively utilizing a heat source.

In other words, one absorption refrigerator operates as a single effect when using a low-temperature heat source such as solar heat or low-temperature water, and operates as a double-effect or single-effect when using a high-temperature heat source such as city gas, kerosene, or high-temperature steam. It is used in combination with a double 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 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 chamber, and heats and separates a refrigerant from a dilute liquid; 4;
5 is a low temperature generator that reheats the refrigerant vapor sent out from the high temperature generator 1 as a heat source and further heats and separates the intermediate liquid refrigerant; 5 is a cooler 6 that cools the refrigerant flowing from both generators 1 and 4; A condenser for condensing and cooling, 7 an evaporator for obtaining cold water for air conditioning from a water cooler 8 by utilizing latent heat when the liquid refrigerant from the condenser 5 is dispersed and vaporized; An absorber 10 that maintains the inside of the evaporator 7 at a low pressure and continuously supplies cold water by scattering a concentrated liquid from which the refrigerant is separated in the generator 4 and absorbing the refrigerant vapor inside the container. and 11 are a low-temperature heat exchanger and a high-temperature heat exchanger, which include a refrigerant vapor pipe 12, a refrigerant liquid down-flow pipe 13, a refrigerant circuit 15 having a refrigerant pump 14, and a dilute liquid pipe 1 having an absorption liquid pump 16.
7. The intermediate liquid pipe line 18 and the concentrated liquid pipe line 19 are connected to each other to form a refrigeration cycle. 20 is a hot water heat exchanger provided between the high temperature generator 1 and the refrigerant vapor pipe 12.

Reference numeral 21 denotes an auxiliary generator that uses a low-temperature heat source as a heating source, which is installed in parallel with the condenser 5, and the upper and lower parts of the generator are connected to the dilute liquid pipe 17 of the refrigeration cycle and the concentrated liquid through conduits 22 and 23, respectively. It is connected to conduit 19.
24 and 25 are a first absorption liquid control valve and a second absorption liquid control valve, 26 is a heat source flow control valve, and these control valves are adjusted in opening degree by a temperature controller 27 that is activated by detecting the outlet temperature of the water cooler 8. will be carried out.

Next, the operation will be explained.

(a) Single-effect operation In this case, sufficient heat can be obtained from the low-temperature heat source, so the second absorption liquid control valve 25 and the heat source flow rate control valve 2
6 and the on-off valves 28 and 29 are both closed, and a refrigeration cycle is constituted by the auxiliary generator 21, the condenser 5, the evaporator 7, the absorber 9, and the low-temperature heat exchanger 10,
Cold water for cooling is supplied from the water cooler 8. The temperature of the cold water is controlled by adjusting the opening degree of the first absorption liquid control valve 24 using a temperature controller 27 that detects the outlet temperature of the cold water.

(b) Dual-effect operation In this case, there is a shortage of low-temperature heat sources, so the heat source flow rate control valve 26, the second absorption liquid control valve 25, and the on-off valve 2
8, 29 are opened and a high-temperature heat source such as city gas or kerosene is combusted in the combustion heating chamber 2 to generate a high-temperature generator 1, a low-temperature generator 4, a condenser 5, an evaporator 7,
Absorber 9, low temperature heat exchanger 10 and high temperature heat exchanger 1
1 constitutes a refrigeration cycle, to which cold water for cooling is supplied from a water cooler 8 and hot water for temperature regulation is supplied from a hot water heat exchanger 20. When the cold water temperature reaches a predetermined value, the first absorption liquid control valve 24 is controlled by the temperature controller 27.
By opening the second absorption liquid control valve 25 and the heat source flow rate control valve 26, the evaporation of the refrigerant in the evaporator 7 and the generation of refrigerant in the high temperature generator 1 are suppressed. Note that when heating is performed using hot water, the on-off valves 28 and 29 and the second absorption liquid control valve 25 are closed to circulate the refrigerant between the high temperature generator 1 and the hot water heat exchanger 20.

As mentioned above, the single and double effect absorption refrigerator according to the present invention uses a high temperature heat source as a heating source, and a high temperature generator,
In a dual-effect absorption refrigerator in which a refrigeration cycle is configured by connecting a low-temperature generator, a condenser, an evaporator, an absorber, a low-temperature heat exchanger, and a high-temperature heat exchanger, a low-temperature heat source is used as a heating source for the condenser. An auxiliary generator is installed in parallel, and the upper and lower parts of the auxiliary generator are connected to the dilute liquid line and the concentrated liquid line of the refrigeration cycle through conduits, respectively, and are connected to the high temperature generator according to the capacity of the auxiliary generator. Since the heating source and solution supply amount are controlled, one absorption chiller can be operated as single-effect or dual-effect depending on the heat source, and switching between them is easy, resulting in effective use of energy and economical and stable operation. can be maintained.

[Brief explanation of the drawing]

The drawing is a block diagram of a single and dual effect absorption refrigerator according to the present invention. 1... High temperature generator, 4... Low temperature generator, 5... Condenser, 21... Auxiliary generator, 25... Second absorption liquid control valve, 26... Heat source flow control valve.

Claims (1)

[Claims] 1. In a dual-effect absorption refrigerator that uses a high-temperature heat source as a heating source and connects a high-temperature generator, a low-temperature generator, a condenser, an evaporator, an absorber, a low-temperature heat exchanger, and a high-temperature heat exchanger to form a refrigeration cycle. , an auxiliary generator using a low-temperature heat source as a heating source is installed in parallel with the condenser, and the upper and lower parts of the auxiliary generator are connected to the dilute liquid pipe and the concentrated liquid pipe of the refrigeration cycle, respectively, through conduits, and A single/double effect absorption refrigerator characterized by controlling the heating source and solution supply amount to the high temperature generator according to the capacity of the auxiliary generator.