JPH0835736A - Compression and absorption type compound refrigerator - Google Patents

Abstract

PURPOSE:To increase the capacity of a compression type refrigerator without switching the refrigerator by supplying the evaporator cooling water of an absorption type refrigerator as the condenser cooling water of the compressor type refrigerator. CONSTITUTION:When refrigerant such as fluorocarbon gas compressed and raised at its temperature by a compressor 3 is fed to an evaporator 2 via a condenser 1, an expansion valve 3, and an icemaker for cooling water to make ice by evaporating it via the evaporator, an absorption type refrigerator is connected to lower the temperature of cooling water 5 of the condenser 2. Steam evaporated by removing heat from the water 5 in the evaporator 6 is introduced into an absorber 7 to be absorbed to LiBr solution therein, the dilute solution generated here is introduced to a regenerator 8 to be heated, the displaced steam is condensed by a condenser 9, introduced into the evaporator 6, heat is removed from the water 5 to be cooled. The above operation is repeated to increase the refrigerating capacity of a compression type refrigerator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compression-absorption type combined refrigerator which is a combination of a compression type and an absorption type applied to an ice making machine.

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional compression refrigerator comprises a condenser 1, an evaporator 2 and a compressor 3, which compress a refrigerant such as CFC gas to a high temperature. In the condenser 1, the temperature of the refrigerant is lowered by the cooling water 5, and thereafter by the expansion valve 4, the pressure is reduced by expanding and decompressing it, and the temperature is lowered. This low-temperature refrigerant is sent to the evaporator 2 where it is vaporized to cool the water in the pipe 6 and make ice.

[0003]

In order to increase the refrigerating capacity of the compression refrigerator, it is necessary to increase the pressure ratio of the compressor or increase the flow rate of the refrigerant. This will increase the load on the compressor. When trying to increase the capacity of an existing compression refrigerator, it is difficult to install a new one because it uses Freon as the refrigerant.

[0004]

The compression-absorption type combined refrigerator according to the present invention supplies the evaporator cooling water of the absorption refrigerator as the condenser cooling water of the compression refrigerator.

[0005]

The cycle of the compression type refrigerator is shown in FIG. 2 by the TS diagram.
Show. Temperature T₁Evaporate the refrigerant in the evaporator from 1 to 2.
, The cooling heat q₁Take this
This becomes the refrigerating capacity. Adiabatic compression from 2 to 3 with a compressor
Temperature is T₂Rise to. In the state of 3, the refrigerant is saturated vapor
Then, the heat is taken up by the condenser and the saturated liquid of 4 is brought into the state. 4
From 1 to 1, it is expanded by the expansion valve, and again the temperature T ₁State of
Take it to me. Figure 3 When the cooling water temperature of the condenser is lowered
The temperature of the refrigerant at the outlet of the condenser is
_Four Can be lowered to ´, resulting in a hatched surface
The refrigerating capacity represented by the product is q₁′, And q shown in FIG.
₁Can be larger.

[0006]

EXAMPLE FIG. 1 shows an example of the present invention, and the constitutions 1 to 5 of the compression type refrigerator are the same as the conventional ones, but the cooling water 5 of the condenser 1 is
Connect an absorption refrigerator to lower the temperature. In the evaporator 6, heat is taken from the cold water 5 (4 to 7 ° C.) to evaporate the water into steam. This water vapor enters the absorber 7 and Li
It is absorbed in a solution of Br (lithium bromide). The dilute solution that has absorbed the water vapor enters into the regenerator 8 by a pump (not shown) and is heated by exhaust heat in the regenerator 8. The water vapor in the dilute solution is expelled into a concentrated solution and returns to the absorber 7. The displaced steam is condensed in the low-pressure condenser 9 to become water and enters the evaporator 6, where heat is taken from the cold water 5. By repeating this, it is possible to increase the refrigeration capacity by using the existing compression refrigerator as it is.

[0007]

EFFECT OF THE INVENTION The capacity of a compression refrigerator using freon as a refrigerant can be increased without lowering the temperature of the cooling water of the condenser without replacing the refrigerator. That is, the refrigerating capacity can be increased by supplying the cold water produced by the absorption refrigerator as the cooling water for the condenser of the compression refrigerator.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a cycle diagram of a conventional compression refrigerator.

FIG. 3 is a cycle diagram showing effects of the embodiment of the present invention.

FIG. 4 is a configuration diagram of a conventional example according to the present invention and an embodiment.

[Explanation of symbols]

 1 Condenser 5 Cooling water 6 Evaporator

Claims (1)

[Claims] 1. A compression-absorption type combined refrigerating machine, wherein evaporator cooling water of an absorption refrigerating machine is supplied as condenser cooling water of a compression refrigerating machine.