JPS60129574A - Absorption and compression type refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an absorption/compression type refrigeration system having a combined structure of an absorption type and a compression type.

[Traditional technique]

FIG. 1 is a block diagram showing an outline of a conventional single-effect absorption refrigerating apparatus. Namely.

In FIG. 1, numeral 1 is an evaporator/absorber, 2 is a generator, and 3 is a condenser. The evaporator/absorber 1 is connected to a generator 2 via a solution circulation pump 4 and a heat exchanger 5, and the generator 2 is connected via a heat exchanger 5 to the evaporator/absorber 1. The generator 2 also has a heater 8 using an external heating source, and the generator 2 is connected to a condenser 3 via a condenser 3 through a throttling mechanism 7. The absorption heat cooling pipe 8 and the condensation heat cooling pipe from an external cooling source are connected to the absorber section in the evaporator/absorber 1 and the condenser 3. θ are arranged in series and also the evaporator/absorber l
The structure is such that the evaporator section inside faces the 10 yen to be cooled.

In this conventional configuration, the solution in the evaporator/absorber 1 is first transferred to the generator 2 by the solution circulation pump 4, and the solute (generally lithium bromide) is converted into solute (generally lithium bromide) in the generator 2 by heating by the heater 6. It is separated into a solvent (generally water). This separated solute (actually a concentrated solution containing a small amount of solvent) is then transferred to the evaporator/absorber 1 by +If degrees while heating the solution transferred by the solution circulation pump 4 through the heat exchanger 5. The other solvent that has been reconstituted and also separated, in this case the solvent that has been separated as a vapor by heating, is
The condenser 3 is cooled and liquefied via the condensation heat cooling pipe 9 by the cooling water that has passed through the absorption heat cooling pipe 8 in the absorber section of the evaporator/absorber I. After the pressure of this liquefied refrigerant is reduced by the throttle mechanism 7, it evaporates in the evaporator/absorber 1 by taking away the latent heat of evaporation from the medium to be cooled, and exhibits a refrigeration effect, and the refrigerant after this evaporation The solute is mixed again with the concentrated solution returned from the generator 2 to form a solution with a predetermined concentration, and by repeating the above action, a continuous refrigeration effect can be obtained in the evaporator section of the evaporator/absorber 1. It will be done.

In this case, a solution in which a non-volatile substance is mixed with the solute will raise the boiling point of the solvent, so in order to cool and liquefy the vapor generated in the generator 2 in the condenser 3, the generator The solution cannot be liquefied unless it is cooled by a cooling medium with a temperature lower than that of the solution in step 2 (the inside of the generator 2 and the inside of the condenser 3 are connected to the phase The internal pressures of both are the same if we ignore That is, the steam separated in the first generator 2 did not have a saturated steam pressure at that temperature, and the steam temperature at the pressure inside the generator differed from the parallel state of normal steam alone due to the rise in boiling point. In other words, it is maintained at a low pressure, and this state is shown in FIG. FIG. 2 shows the relationship between the temperature and vapor pressure of pure water and solutions (concentration parameters). In FIG. 2, a solution with a concentration of 60% at a temperature t1 has a pressure p2, but when it is only pure water, the pressure is ρ1. That is, the pressure of the steam in the generator 2 is p, and in order to liquefy this steam in the condenser 3, the pressure must be lower than the same temperature t, and at least lower than the temperature t. On the other hand, in the conventional configuration described above, the heat energy carried away by the cooling medium from the outside is located at a high temperature within the system, resulting in effective energy being wasted. It was to be consumed.

[Summary of the invention]

In view of this conventional situation, the present invention provides a refrigeration system with a conventional configuration, in which a compressor is interposed between the generator and the condenser, thereby achieving absorption-type compression. This configuration is a combination of formulas, so that effective energy can be used effectively.

〔Example〕

Hereinafter, one embodiment of the absorption/compression type refrigeration apparatus according to the present invention will be described in detail with reference to FIGS. 3 and 4.

The embodiment device shown in FIG. 3 is a block diagram corresponding to the conventional device shown in FIG.

The same reference numerals indicate the same or equivalent parts, and this third
In the illustrated embodiment, a compressor lt is interposed in a pipe line that communicates the generator 2 and the condenser 3. Note that there is a refrigerant circulation pump 1 in the pipe line to the heater 6.
2. A condensation heat cooling pipe 13 disposed inside the condenser 3 is interposed.

That is, in this way, the compressor 11 is interposed in the pipe line communicating the generator 2 and the condenser 3 so that the solution at the temperature t can be liquefied, thereby reducing the thermal energy provided by the heater 6 ( This is what I did.

The amount of thermal energy input into the system is the compressor,
The heat of absorption given by the heater and evaporator, and produced by the remixing of vapor and concentrated solution in the absorber, is removed by cooling water in the absorber and condenser, respectively, to maintain the heat balance. At this time, in the condenser, in order to supercool the liquefied cold tofu with cooling water,
This results in further promoting the freezing effect. 2
In other words, as can be seen in the S-diagram of the refrigerant shown in Fig. 4, the freezing effect when not supercooled is j 312 M, but with supercooling at +2 J, the freezing effect is 13 −
As shown in 11, there is 1 increase.

In addition, in the embodiment shown in FIG. 3, when the compressor 11 is heated, the heating energy by the heater 8 may not be necessary.On the other hand, when the heating energy is provided by the heater 8, In order to stop #111 and perform a cartwheel similar to the conventional one, it is recommended to form a bypass circuit in the compressor 11 as shown by the broken line in the same figure. It can be said that it is suitable for devices that utilize solar heat. Furthermore, when the compressor 11 is operated constantly, it is only necessary to supply heating energy to the heater 6 at the time of initial startup, and it is not necessary thereafter. It is even more effective when using the heat source available in

) The conventional vapor compression system using a compressor will be described in detail with reference to FIG. 3. In this case, the compressor 11 directly extracts steam from the evaporator 5 of the evaporator/absorber 1 along the path indicated by the two-dot chain line. After the vapor is discharged to the condenser 3 to be cooled and liquefied, the medium to be cooled is cooled in the evaporator section of the evaporator/absorber 1 via the expansion mechanism 7. The compressor suction pressure in this example is higher than the suction pressure in this example, so compared to the conventional vapor compression type, the compressor 11 in this example This requires less power.

〔Effect of the invention〕

As described in detail above, according to the present invention, a compressor is interposed between the generator and the condenser of the refrigeration system, so that the configuration is essentially a combination of an absorption type and a compression type. By eliminating wasted consumption of effective energy, the thermal efficiency of this type of refrigeration equipment can be greatly improved, and compared to conventional systems, it has an extremely simple configuration that only requires a compressor, so it is easy to use. It has features such as being able to be implemented.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an overview of a conventional absorption refrigerating device, Fig. 2 is a graph showing the relationship between the temperature and vapor pressure of pure water and solutions to explain the operation of the same device, and Fig. 3 The figure is a block diagram 1Δ showing an outline of an absorption/compression type refrigeration system according to an embodiment of the present invention, and FIG. 4 is a state diagram of the refrigerant in the same system. 1... Evaporator/absorber, 2... Generator, 3...
・Condenser, 4... Solution circulation pump, 5... Heat exchanger, 6... Heater, 7... Throttle mechanism, 8...
...Absorption heat cooling pipe, 8.13...Condensation heat cooling pipe, i
o...Cooled pipe, 11...Compressor, 12...
・Refrigerant circulation pump. Patent applicant Mikata Shipbuilding Co., Ltd. Agent Masaki Yamakawa (and 1 other person) Figure 1 Figure 2 i! -P1L sentence Figure 3 Figure 4-X-sita IL, e”-

Claims (1)

[Claims] <1) M generator/absorber has 9 generators and a condenser, front,
The evaporator/absorber and the generator are connected via a solution circulation pump and a heat exchanger, and the generator and the evaporator/absorber are connected via a line via the heat exchanger, and the The generator is provided with a heater using an external heating source, and the generator is connected to the condenser via a compressor,
The condenser in the parentheses and the evaporator/absorber are connected via a conduit mechanism, and the cooling tube for absorbing heat by an external cooling source is connected to the inside of the evaporator/absorber and the condenser to prevent evaporation. / Absorption/compression type characterized in that the same condensation heat cooling pipe is arranged in series on the condenser side (2) A refrigerant circulation pump and a refrigerant circulation pump are installed in the pipe line from the generator to the heater. 2. The absorption/compression type refrigeration apparatus according to claim 1, further comprising a condensation heat cooling pipe disposed within the condenser.