JPS6025708B2 - absorption refrigeration equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an absorption refrigeration system that can be operated using a low-temperature heat source.

As a conventional technology for absorption refrigeration equipment that can be operated using a low-temperature heat source such as factory waste liquid, for example,
As seen in Japanese Patent No. 425, a multi-stage refrigeration system is known in which a compressor is disposed in the middle of a connecting pipe between a generator and a condenser. However, in this multi-stage refrigeration system, the heat of the cold soot, which is pressurized and heated by the drive energy of the compressor, is discarded from the condenser outside the system without being utilized for concentrating the absorption liquid and separating the refrigerant vapor. Therefore, the coefficient of performance will decrease accordingly. Furthermore, since there is no means for controlling the drive of the compressor, there is also the drawback that the refrigerating capacity cannot be adjusted to match the refrigerating load. The present invention has been made in view of these problems, and embodiments of the absorption refrigeration apparatus according to the present invention will be described below with reference to the drawings. In the figure, 1 is a generator that is heated by an appropriate heat source fluid such as exhaust gas and vaporizes and separates cold soot from the absorption liquid, 2 is a condenser, 3 is an evaporator, and 4 is the evaporator 3 that absorbs the vaporized slag medium. The absorber 5 is a heat exchanger that exchanges heat between the high temperature concentrated absorption liquid flowing from the generator 1 and the low temperature dilute absorption liquid returning from the absorber 4 to the generator 1.

The cold soot pipe 6 of the present invention that sends the gaseous cold soot heated and separated from the absorption liquid in the generator 1 to the condenser 2 is equipped with a cold soot pressurizing device 7 such as a turbo fan or a compressor. A heat exchanger 8 is provided to reheat the absorption liquid in the generator, and the cold soot liquid that is reheated and condensed by the heat exchanger is
After exchanging heat with the dilute absorption liquid that returns to the generator 1, it flows into the condenser 2.

As an example of such an operation, when cold soot gas generated at a pressure of 60 Hg is increased in pressure to 650 Hg by the pressurizing device 7, the temperature of the cold soot becomes approximately 95 oo, and when it is led to the heat exchanger 8, The absorption liquid in the generator is reheated by the latent heat of condensation of this cold soot, and the lining can be separated again. FIG. 2 shows another embodiment of the present invention, in which the generator 1 and the condenser 2 are connected to a side pipe 10 having a valve 9 whose opening degree is adjusted depending on the load of other cold water in the refrigerant pipe 6. It is attached. When the chilled water load decreases, the controller 11 receives a signal from a detector that detects the chilled water outlet temperature of the evaporator 3, and controls the pressurizing device 7 so that its operating power is suppressed. In addition, if the chilled water load further decreases or the thermal energy of the low-temperature heat source such as exhaust gas increases, and it becomes possible to operate with just the low-temperature heat source, the controller 11 controls the operation of the pressurizing device 7. is stopped and the opening degree of the valve 9 is controlled. Note that this valve 9 may be closed when the pressurizing device 7 is in operation, or may be controlled together with the pressurizing device 7. As described above, the absorption refrigeration system of the present invention utilizes the heat of the cold butterfly whose temperature has been raised by the pressurizing device to generate refrigerant and concentrate the absorption liquid in the generator, and also uses the heat of the low-temperature heat source to supply the generator to the generator. Since it has the function of replenishing and adjusting the heat shortage with the operating energy of the pressurizing device according to the size of the heat shortage for the chilled water load, even if the heating heat source of the generator is low temperature, the operation of the absorption cold moat machine is not affected. There is no problem with this, and it is possible to take out cold water commensurate with the load, and the coefficient of performance can also be improved, so it has a wide range of applications as an absorption refrigerating machine that uses exhaust gas, etc.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an absorption refrigerating apparatus showing one embodiment of the present invention, and FIG. 2 is a block diagram showing another embodiment. 1... Generator, 2... Condenser, 6... Cold soot pipe line, 7... Pressurizing device, 8... Heat exchanger,
11...Controller. Figure 1 Figure 2

Claims (1)

[Claims] 1. A refrigerant pressurizing device is installed in the refrigerant pipe connecting the generator and condenser that make up the absorption refrigerator, and heat is exchanged between the refrigerant pressurized by the pressurizing device and the absorption liquid flowing into the generator. 1. An absorption refrigerating apparatus, comprising an exchanger and a controller for controlling the operation of a pressurizing apparatus according to the load of an absorption refrigerating machine.