JPH11223412A - Refrigerating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerating device in which a compression type refrigerating system is combined with an absorption type refrigerating system so as to ensure high refrigerating capacity. SOLUTION: A refrigerating device comprises a compression type refrigerating system Za having a compress 1, a heat source side heat exchanger 2, a feeding side heat exchanger 3 and a pressure reducing mechanism 4; and an absorption type refrigerating system Zb having a generator 11, a condenser 12, an evaporator 13, an absorber 14 and a pressure reducing mechanism 15. Liquid refrigerant is guided to the evaporator 13 of the absorption type refrigerating system Zb from the heat source side heat exchanger 2 of the compression type refrigerating system Za and supercooled by the heat of evaporation of the evaporator 13. In this constitution, evaporation temperature is lowered in the compression types refrigerating system Za to improve a refrigerating capacity. In the absorption type refrigerating system Zb, the evaporation temperature of the liquid refrigerant Lb is set to high temperature to raise the absorption solution of the generator and obtain complete refrigerating capacity due to low temperature exhaust heat. The refrigerating capacity of all the device is enhanced and an energy saving operation is realized as the synergetic effect of both the systems.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration apparatus constructed by combining a compression refrigeration system and an absorption refrigeration system.

[0002]

2. Description of the Related Art In recent years, from the viewpoint of effective use of resources, for example, waste heat from cogeneration facilities (for example,
Technical development for effectively utilizing low-temperature exhaust heat (about 75 ° C.) has been carried out, and the same tendency applies to refrigeration systems (for example, see Japanese Patent Application Laid-Open No. Hei 8-93553).

[0003]

By the way, in a refrigerant vapor compression type refrigeration system which is a conventional general refrigeration system, it is difficult to generate cold heat of about 7 ° C. by using exhaust heat as a heat source. Impossible.

On the other hand, in an absorption refrigeration system driven by heating a concentrated absorption solution that has absorbed refrigerant vapor, low-temperature exhaust heat can be used as a heat source of a generator. However, in such an absorption refrigeration system, when the temperature of the absorption solution in the generator is lowered, the concentration range of the absorption solution is correspondingly narrowed and the refrigeration capacity is reduced, and if the evaporation temperature of the refrigerant is lowered, Since the concentration width is narrowed, it is difficult to reduce the evaporation temperature to a temperature at which cooling can be performed, because the concentration width cannot be secured, and it is difficult to realize. In addition, if the evaporation temperature is set to be low, the heat source temperature of the generator must be increased in order to sufficiently increase the generator temperature to increase the concentration range of the absorbing solution and maintain a high refrigeration capacity. However, since the exhaust heat is usually about 75 ° C., it is extremely difficult to realize the above.

Accordingly, an object of the present invention is to provide a refrigerating apparatus which can secure a high refrigerating capacity by combining a compression type refrigerating system and an absorption type refrigerating system and utilizing the advantages of both. It is a thing.

[0006]

Means for Solving the Problems In the present invention, the following configuration is adopted as specific means for solving such problems.

A refrigeration apparatus according to the first invention of the present application, as illustrated in FIG. 1, has a compression type including a compressor 1, a heat source side heat exchanger 2, a use side heat exchanger 3, and a pressure reducing mechanism 4. A refrigeration system Za, an absorption refrigeration system Zb including a generator 11, a condenser 12, an evaporator 13, an absorber 14, and a decompression mechanism 15;
The liquid refrigerant from the heat source side heat exchanger 2 of the compression type refrigeration system Za is guided to the evaporator 13 and is supercooled by the heat of evaporation in the evaporator 13. .

In a second aspect of the present invention, as shown in FIG. 2, in the refrigeration apparatus according to the first aspect, the compression refrigeration system is used as a heat source of the generator 11 in the absorption refrigeration system Zb. Za is characterized by using the discharge gas heat of the discharge gas discharged from the compressor 1.

According to a third aspect of the present invention, as shown in FIG. 3, in the refrigeration apparatus according to the second aspect, at least a part of heat radiation in the absorption refrigeration system Zb is reduced by the compression refrigeration system. The system Za is cooled by refrigerant vapor sucked into the compressor 1 from the use side heat exchanger 3 side.

In the fourth invention of the present application, the first or the second
In the refrigerating apparatus according to the present invention, the driving source of the compressor 1 in the compression type refrigerating system Z is configured to use a driving force generated by combustion, and the exhaust heat generated by the combustion is rejected by the absorption type refrigerating system. Zb is led to the generator 11 and is used as a heat source of the generator 11.

In the fifth invention of the present application, the first or the second
In the refrigeration apparatus according to the present invention, as the heat source of the generator 11 in the absorption refrigeration system Zb, external exhaust heat supplied from an engine, a turbine, a fuel cell or the like as a driving source, a cogeneration facility, or the like is used. It is characterized by being used.

In a sixth aspect of the present invention, the first, second,
In the refrigeration apparatus according to the third, fourth or fifth invention,
It is characterized in that a fluorocarbon-based refrigerant is used as the refrigerant in the absorption refrigeration system Zb.

In the seventh invention of the present application, the first, second,
The refrigeration apparatus according to the third, fourth, fifth or sixth aspect is characterized in that the same refrigerant as the refrigerant in the absorption refrigeration system Zb is used as the refrigerant in the compression refrigeration system Za.

In the eighth invention of the present application, the first, second,
In the refrigeration apparatus according to the third, fourth, fifth, sixth or seventh invention, the use side heat exchanger 3 functions as a condenser during heating, and the heat source side heat exchanger 2 functions as an evaporator. And the heat exchanger 3 is configured to perform heat exchange between the refrigerant circulating in the refrigeration cycle and the fluid to be heated introduced from the outside. It is characterized in that it is heated by external exhaust heat.

In the ninth invention of the present application, the first, second,
In the refrigeration apparatus according to the third, fourth, fifth, sixth or seventh invention, the use side heat exchanger 3 functions as a condenser during heating, and the heat source side heat exchanger 2 functions as an evaporator. And at the time of heating, a part of the liquid refrigerant from the use-side heat exchanger 3 is heated by external exhaust heat,
The refrigerant vapor generated thereby is drawn into the compressor 1.

[0016]

According to the present invention, the following effects can be obtained by adopting such a configuration.

According to the refrigerating apparatus according to the first aspect of the present invention, the compressor 1, the heat source side heat exchanger 2, and the use side heat exchanger 3
And a compression refrigeration system Za having a pressure reducing mechanism 4, an absorption refrigeration system Zb having a generator 11, a condenser 12, an evaporator 13, an absorber 14, and a pressure reducing mechanism 15. Evaporator 1 of the refrigeration system Zb
3, the liquid refrigerant from the heat source side heat exchanger 2 of the compression refrigeration system Za is guided and supercooled by the heat of evaporation in the evaporator 13. In Za, when the liquid refrigerant is supercooled, the enthalpy of the liquid refrigerant is reduced, and the refrigeration capacity is improved accordingly. In the absorption refrigeration system Zb, it is sufficient if the liquid refrigerant on the compression refrigeration system Za side can be supercooled by the liquid refrigerant. In addition, the evaporating temperature of the liquid refrigerant can be set high, so that the refrigerant concentration of the absorbing solution in the generator becomes high, and sufficient refrigeration capacity can be realized by low-temperature exhaust heat. As a synergistic effect of these two, the refrigerating capacity of the whole refrigerating apparatus is enhanced, and the energy saving operation is realized.

According to the refrigeration apparatus of the second aspect of the present invention, the following specific effects can be obtained in addition to the effects described above. That is, in the present invention, as the heat source of the generator 11 in the absorption refrigeration system Zb, the discharge gas heat of the discharge gas discharged from the compressor 1 of the compression refrigeration system Za (that is, the vapor heat of the refrigerant vapor) ), That is, a heat source generated in the system of the compression type refrigeration system Za and not effectively used is used. Energy-saving operation is further promoted as compared with the case where energy is input from a vehicle.

According to the refrigeration apparatus of the third aspect of the present invention, the following specific effects can be obtained in addition to the effects described above. That is, in the present invention, at least a part of the heat radiation in the absorption refrigeration system Zb is at least partially performed by the refrigerant vapor sucked into the compressor 1 from the use side heat exchanger 3 side of the compression refrigeration system Za. Since the cooling is performed, in the absorption refrigeration system Zb, the refrigerant vapor or the absorption solution introduced into the absorber 14 is cooled by the refrigerant vapor of the compression refrigeration system Za. The function of absorbing the refrigerant vapor into the absorbing solution in the absorber 14 is promoted, and higher refrigeration capacity is obtained.

Further, the refrigerant vapor on the compression type refrigeration system Za side is superheated by cooling the heat radiation on the absorption type refrigeration system Zb side, and the amount of the superheated heat of the discharge gas from the compressor 1 is increased. The amount of heat increases, and the refrigeration capacity of the absorption refrigeration system Zb further improves due to the increase in the amount of heating heat of the generator 11 in the absorption refrigeration system Zb.

According to the refrigeration apparatus of the fourth aspect of the present invention, the following specific effects can be obtained in addition to the effects described above or above. That is, in the present invention, the compressor 1 in the compression refrigeration system Za is used.
And the exhaust heat generated by the combustion is guided to the generator 11 in the absorption refrigeration system Zb and is used as a heat source of the generator 11. It is configured to be.

Therefore, only the combustion waste heat is supplied to the generator 1
When used as the heat source 1, the combustion waste heat has a relatively large amount of heat and is stably supplied.
In the absorption refrigeration system Zb, a high level and stable refrigeration capacity is secured. When the combustion exhaust heat is used as the heat source of the generator 11 together with the heat of the gas discharged from the compressor 1, a larger amount of heat is added to the generator 11.
In this case, the amount of refrigerant vapor generated increases, and the refrigeration capacity of the absorption refrigeration system Zb is further enhanced by expanding the concentration range of the absorption solution.

According to the refrigeration apparatus of the fifth aspect of the present invention, the following specific effects can be obtained in addition to the effects described above or above. That is, in the present invention, the generator 1 in the absorption refrigeration system Zb is used.
As the first heat source, power generation equipment driven by an engine, a turbine, a fuel cell, or the like, or external exhaust heat supplied from a cogeneration facility or the like is used. Thus, the cost of the refrigeration system is further promoted and the external heat source can be effectively used.

According to the refrigeration apparatus of the sixth aspect of the present invention, the following specific effects can be obtained in addition to the effects described above or above. That is,
In the present invention, since the fluorocarbon-based refrigerant is used as the refrigerant in the absorption refrigeration system Zb, the properties of the fluorocarbon-based refrigerant enable the refrigerant vapor to be at a high pressure, and there is no fear of corrosion in the system. Therefore, it is possible to easily reduce the cost or the size of the device.

According to the refrigeration apparatus of the seventh aspect of the present invention, the following specific effects can be obtained in addition to the effects described above,, or. That is, in the present invention, the same refrigerant as the refrigerant in the absorption refrigeration system Zb is used as the refrigerant in the compression refrigeration system Za. There is no need to distinguish between them, and the serviceability improves accordingly.

According to the refrigeration apparatus of the eighth aspect of the present invention, the following specific effects can be obtained in addition to the effects described above,,, or. That is, in the present invention, the use side heat exchanger 3 functions as a condenser during heating, and the heat source side heat exchanger 2 functions as an evaporator, and the use side heat exchanger 3 is connected to a refrigeration cycle. Heat exchange is performed between the refrigerant circulating inside and the heated fluid introduced from the outside, and the heating fluid is heated by external exhaust heat from the outside during heating, so that heating is performed. At times, a system that can effectively use exhaust heat can be easily constructed with a simple configuration.

According to the refrigeration apparatus of the ninth aspect of the present invention, the following specific effects can be obtained in addition to the effects described above. That is, in the present invention, the use-side heat exchanger 3 functions as a condenser during heating, and the heat-source-side heat exchanger 2 functions as an evaporator. A part of the liquid refrigerant is heated by the external exhaust heat, and the refrigerant vapor generated thereby is sucked into the compressor 1. Therefore, a simple configuration of a system capable of effectively using the exhaust heat even during heating is provided. Can be constructed more easily.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be specifically described based on preferred embodiments.

First Embodiment FIG. 1 shows a refrigeration apparatus Z1 according to a _first embodiment of the present invention. The refrigeration system Z ₁ is constructed by combining the compression refrigeration system Za driven by compressing a refrigerant, an absorption refrigeration system Zb driven by heating play absorbing solution which has absorbed refrigerant I have.

Compression type refrigeration system Za The compression type refrigeration system Za comprises a compressor 1, a heat source side heat exchanger 2 functioning as a condenser, a pressure reducing mechanism 4, and a use side heat exchanger 3 functioning as an evaporator. Channel 41, channel 42
And the flow path 43. And
In the compression refrigeration system Za, the compressor 1
The high-temperature and high-pressure refrigerant vapor Ga ₁ compressed in the above is introduced into the heat source side heat exchanger 2 through the flow path 41 and condensed therein to become the liquid refrigerant La, and the liquid refrigerant La After the pressure is reduced in the pressure reducing mechanism 4 provided in the passage 42, the pressure is introduced into the use side heat exchanger 3 and evaporates there to become a low-temperature / low-pressure refrigerant vapor Ga ₂ , and further through the flow passage 43, By being sucked into the compressor 1, a compression refrigeration cycle is configured.

In this embodiment, the flow path 4
2, at an intermediate position between the heat source side heat exchanger 2 and the pressure reducing mechanism 4,
The liquid refrigerant La introduced into the use side heat exchanger 3 through the evaporator 13 of the absorption refrigeration system Zb described below.
The liquid refrigerant Lb on the side of the absorption refrigeration system Zb is decompressed and evaporated to supercool it. This supercooling will be described later in detail.

In this embodiment, a "fluorocarbon-based refrigerant" is used as a refrigerant in the compression refrigeration system Za.

Absorption refrigeration system Zb Absorption refrigeration system Zb comprises a generator 11 and a condenser 1
2, a pressure reducing mechanism 22, an evaporator 13, an absorber 14, a pressure reducing mechanism 15, a solution pump 16, and a solution heat exchanger 17. In the absorption refrigeration system Zb, the absorption liquid stored in the generator 11 (for example,
Refrigeration oil) and refrigerant (for example, fluorocarbon refrigerant)
DOO heats the absorbent solution Lc mixed to generate a refrigerant vapor Gb ₁ from said absorption solution Lc. This refrigerant vapor Gb ₁
After being introduced into the condenser 12 through the flow path 44 and condensed therein to form a liquid refrigerant Lb, the liquid refrigerator Lb is depressurized by the decompression mechanism 22 provided in the flow path 45, In the evaporator 13, the refrigerant is evaporated by heat exchange with the liquid refrigerant La on the compression refrigeration system Za side, and is introduced into the absorber 14 side as refrigerant vapor Gb ₂ . On the other hand, a concentrated absorption solution Lc ₁ is introduced into the absorber 14 from the generator 11 side through the flow path 47 and in a state where the pressure is reduced by the pressure reducing mechanism 15. , The concentrated absorption solution L from the generator 11 side
During c _1, the refrigerant vapor Gb ₂ from the evaporator 13 side is absorbed, the concentration absorption solution Lc ₁ is dilute absorbent solution Lc _2, and the by the solution pump 16 is returned to the generator 11 side. By the flow of the refrigerant and the flow of the absorbing solution,
An absorption refrigeration cycle is configured.

The absorption refrigeration system Zb is driven by heating the generator 11. In this embodiment, the heat is discharged to the coil 31 disposed in the generator 11. And the exhaust heat is used to heat the absorbing solution Lc (that is, the exhaust heat is used as a heat source). As the exhaust heat used as the heat source, for example, when the compressor 1 is driven by a drive source involving combustion such as an engine or a turbine, the exhaust heat generated by the engine or the like is used as a heat source. In addition to the above, it is also possible to use, as a heat source, external waste heat released from a power generation facility using, for example, an engine, a turbine or a fuel cell, or a cogeneration facility.

By the way, in the refrigeration apparatus Z ₁ of this embodiment, as described above, the supercooling in the evaporator 13 liquid refrigerant La of the compression refrigeration system Za, the liquid refrigerant Lb of the absorption refrigerating system Zb The refrigeration system Z is provided by supercooling the liquid refrigerant La.
₍₁ ) Improvement of the refrigeration capacity as a whole is realized.

That is, the liquid refrigerant La from the heat source side heat exchanger 2 of the compression type refrigeration system Za is guided to the evaporator 13 of the absorption refrigeration system Zb, and is guided by the heat of evaporation in the evaporator 13. By performing overcooling, in the compression refrigeration system Za, the enthalpy of the liquid refrigerant La decreases, and the refrigeration capacity improves accordingly. In the absorption refrigeration system Zb, it is sufficient if the liquid refrigerant La on the compression refrigeration system Za side can be supercooled by the liquid refrigerant Lb. As a result, the evaporation temperature of the liquid refrigerant Lb can be set high, the refrigerant concentration of the absorbing solution in the generator increases accordingly, and sufficient refrigeration capacity can be realized by low-temperature exhaust heat. As a synergistic effect of these two, increased refrigeration capacity of the entire refrigeration system Z _1, is and what the energy saving operation can be realized.

Furthermore, specific effects such as the following can be obtained in this refrigeration system Z _1. That is, for example, when the driving source of the compressor 1 is configured to use the driving force generated by combustion as the heat source of the generator 11 and configured to use the exhaust heat generated by the combustion, Since such combustion waste heat has a relatively large amount of heat and is supplied stably, a high level and stable refrigeration capacity is secured in the absorption refrigeration system Zb. On the other hand, when external exhaust heat supplied from a power generation facility driven by an engine, a turbine, a fuel cell, or the like or a cogeneration facility is used as a heat source of the generator 11, for example, a refrigeration system is used. Compared with the case where a dedicated heat source is provided, cost reduction of the refrigeration device is promoted, and the external heat source can be effectively used.

Further, since the fluorocarbon-based refrigerant is used as the refrigerant in the absorption refrigeration system Zb, the fluorocarbon-based refrigerant can be made to have a high-pressure refrigerant vapor and has no fear of corrosion in the system. Therefore, cost reduction or downsizing of the apparatus can be easily realized. Further, the above-mentioned compression refrigeration system Z
since to use a same fluorocarbon refrigerant and the refrigerant in the absorption refrigerating system Zb to the refrigerant in a, it is not necessary to distinguish both systems Za, the refrigerant Zb during service of the refrigeration system Z _1, the more service It has good properties.

Second Embodiment FIG. 2 shows a refrigeration apparatus Z2 according to a _second embodiment of the present invention. The refrigeration system Z _2, the first of the refrigeration apparatus according Z ₁ the basic configuration to the embodiment will be one that substantially the same, different from the refrigeration system Z ₁ of the first embodiment, said whereas have utilized waste heat as a heat source for the generator 11 in the refrigeration system Z ₁ the first embodiment, the flow path 41 side from the compressor 1 in the refrigeration system Z ₂ in this embodiment The point is that the discharged gas (ie, refrigerant vapor Ga ₁ ) to be discharged is guided to the coil 32 disposed in the generator 11, and the heat of the discharged gas is used as the heat source.

According to such a configuration, the heat source generated in the compression refrigeration system Za and not effectively used is effectively used. For example, the heat source outside the system is added to the generator 11. as compared with the case to inject energy from, only new input energy is unnecessary min, in which energy saving operation of the refrigeration system Z ₂ is promoted.

Since the construction and operation and effects other than those described above are the same as those of the refrigeration system Z1 according to the _first embodiment, here, the respective components in FIG. 2 correspond to the corresponding components in FIG. The same reference numerals are given to the members, and the corresponding description in the above-described "first embodiment" is referred to, and the repeated description is omitted.

Third Embodiment FIG. 3 shows a refrigeration apparatus Z3 according to a _third embodiment of the present invention. The refrigeration apparatus Z ₃ is the refrigeration apparatus according Z ₂ and the basic configuration to the second embodiment will be those that are substantially the same, the refrigeration system Z ₂ is different from the embodiment of said second, said configured to directly inhaled into the refrigerant vapor Ga ₂ through the channel 43 the compressor 1 side from the utilization-side heat exchanger 3 of the compression refrigeration system Za is the refrigeration apparatus Z ₂ of 2 embodiment respect to had, in the refrigerating apparatus Z ₃ of this embodiment, the flow path 43, is via a coil 33 disposed in the absorber 14 of the absorption refrigerating system Zb, the refrigerant vapor Ga leads to ₂ to the coil 33, whereby a point which is adapted to be sucked into the compressor 1 after cooling the refrigerant vapor Gb ₂ and concentrated absorption solution Lc ₁ in the absorber 14.

With this configuration, on the absorption refrigeration system Zb side, the refrigerant vapor Gb ₂ or the concentrated absorption solution Lc ₁ introduced into the absorber 14 is supplied to the refrigerant vapor Ga ₂ of the compression refrigeration system Za. by being cooled by absorption of the refrigerant vapor Gb ₂ to the concentrated absorption solution Lc ₁ in the absorber 14 is promoted, so that a higher cooling capacity is achieved. On the other hand, the refrigerant vapor Ga ₂ on the compression refrigeration system Za side is superheated by cooling the refrigerant vapor Gb ₂ or the concentrated absorption solution Lc ₁ on the absorption refrigeration system Zb side. As a result, in the compressor 1, an amount corresponding discharge gas the refrigerant vapor Ga ₂ is overheated, i.e., heat of the refrigerant vapor Ga ₁ discharged from the compressor 1 is increased, the refrigerant along with this The amount of heat of heating the generator 11 by the steam Ga ₁ increases, and as a result, the refrigeration capacity of the absorption refrigeration system Zb further improves.

Since the configuration and operation and effects other than those described above are the same as those of the refrigerating apparatuses Z ₁ and Z _{2 according to} the _first and _second embodiments, the respective components shown in FIG. The same reference numerals as those in FIG. 1 and FIG. 2 denote the same parts, and redundant description will be omitted by using the corresponding description in the above-described “first embodiment” and “second embodiment”.

Fourth Embodiment FIG. 4 shows a refrigeration apparatus Z4 according to a _fourth embodiment of the present invention. The refrigeration apparatus Z ₄ are, there is positioned a development of the refrigeration system Z ₃ according to the third embodiment, the refrigeration apparatus Z ₃ similarly to the compression refrigeration system Za side of the refrigerant vapor Ga ₂ This cools a part of the heat radiation on the absorption refrigeration system Zb side. Then, a third embodiment of the refrigeration apparatus Z ₃ is different from, in the refrigerating apparatus Z ₃ embodiment the third refrigerant vapor Ga ₂ from the utilization-side heat exchanger 3 of the compression refrigeration system Za The absorber 1 of the absorption refrigeration system Zb
4 to cool the liquid refrigerant Lb and the concentrated absorption solution Lc ₁ on the absorption refrigeration system Zb side, whereas in the refrigeration apparatus Z ₄ of this embodiment, the condenser 12 A heat exchanger 25 is provided in a flow path 45 between the heat exchanger 25 and the evaporator 13, and a flow path 43 from the use side heat exchanger 3 of the compression refrigeration system Za is led to the heat exchanger 25, and the heat exchange is performed. In the heat exchanger 25, the liquid refrigerant Lb from the condenser 12 is transferred to the refrigerant vapor Ga ₂ from the use side heat exchanger 3.
That is, it is configured to be cooled by.

With this configuration, the liquid refrigerant Lb from the condenser 12 is supercooled on the absorption refrigeration system Zb side, so that the compression refrigeration system Za side in the evaporator 13 is provided. The supercooling of the liquid refrigerant La is further promoted, the enthalpy of the liquid refrigerant La is further reduced, and colder heat at a lower temperature can be taken out (that is, the refrigerating capacity can be further improved). Further, when the temperature of the liquid refrigerant Lb decreases, the liquid refrigerant Lb
The enthalpy in the evaporator 13 is reduced, and as a result, the refrigerating capacity is improved.

Further, the refrigerant vapor Ga ₂ on the compression refrigeration system Za side is superheated by cooling the liquid refrigerant Lb on the absorption refrigeration system Zb side. As a result, in the compressor 1, as much as the refrigerant gas Ga ₂ is overheated, the discharge gas, that is, the compressor 1
The amount of heat of the refrigerant vapor Ga ₁ discharged from the heater increases, and accordingly, the amount of heat of heating the generator 11 by the refrigerant vapor Ga ₁ increases. As a result, the refrigeration capacity of the absorption refrigeration system Zb further improves. Will do.

Since the configuration and operation and effects other than those described above are the same as those of the refrigerating apparatuses Z _{1 to} Z _{3 according to} the above-described embodiments, the components shown in FIG. In addition, the same reference numerals are given to the corresponding components as those described above, and the redundant description is omitted by using the corresponding description in each of the above embodiments.

Fifth Embodiment FIG. 5 shows a refrigeration apparatus Z5 according to a _fifth embodiment of the present invention. The refrigeration system Z ₅ is a one having a structure of a combination of a refrigeration system Z ₂ according to the refrigeration apparatus Z ₁ according to the first embodiment and the second embodiment,
The only difference from the above is the configuration of the heat source of the generator 11 in the absorption refrigeration system Zb. That is, exhaust heat is used as the heat source of the generator 11 in the refrigerating apparatus Z1 according to the _first embodiment, and the discharge gas of the compressor 1 is used in the refrigerating apparatus Z2 according to the _second embodiment. for example G by using heat, so that utilizes both the discharge gas heat and exhaust heat both as a heat source for the generator 11 in the refrigerating apparatus Z ₅ in this embodiment. Specifically, the generator 11 is provided with a coil 31 for introducing exhaust heat and a coil 32 for introducing heat of discharged gas.

With this configuration, for example, the amount of heat of the heat source is increased as compared with a case where only exhaust heat is used as a heat source or a case where only discharge gas heat is used. As a result, more heat is added to the generator 11, the amount of refrigerant vapor generated in the generator 11 is increased, and the concentration range of the absorption solution is expanded. The refrigeration capacity of Zb will be further enhanced.

Since the configuration, operation and effect other than those described above are the same as those of the refrigeration systems Z ₁ and Z _{2 according to} the first and second embodiments, the respective components shown in FIG. The same reference numerals are given to the corresponding components as those in FIGS. 1 and 2, and the corresponding description in each of the above embodiments is referred to to omit redundant description.

Sixth Embodiment FIG. 6 shows a refrigeration system Z6 according to a _sixth embodiment of the present invention. The refrigeration apparatus Z ₆ is the fifth a development of the refrigeration apparatus according Z ₅ to an embodiment of the exhaust heat introduced into the single generator 11 in the refrigeration apparatus Z ₅ according to the embodiment of the fifth whereas had a structure in which a coil 31 and discharge coil 32 for gas heat introduction of use, as generator in refrigerating apparatus Z ₆ according to this embodiment,
A generator 11A having a coil 31 for introducing exhaust heat and a generator 11B having a coil 32 for introducing heat of discharged gas are provided. In each of the generators 11A and 11B, a refrigerant vapor Gb is formed from the absorbing solution Lc. ₁ is generated and supplied to the condenser 12 through the flow paths 48 and 49, respectively.

With such a configuration, even when the exhaust heat is not so high, such as the exhaust heat from a polymer electrolyte fuel cell, the exhaust gas heat having a high exhaust heat temperature can be used. The source temperature is kept relatively high,
Generation of the refrigerant vapor Ga ₁ is promoted, and as a result, the refrigeration capacity of the entire absorption refrigeration system Zb can be maintained at a high level by effectively utilizing low-temperature exhaust heat. That is, the present invention provides a heating means particularly suitable when the exhaust heat temperature is relatively low.

Since the configuration and operation and effects other than those described above are the same as those of the refrigerating apparatus Z5 according to the _fifth embodiment, the components shown in FIG. 6 correspond to the components shown in FIG. The same reference numerals are given to the members, and the corresponding description in the fifth embodiment is referred to to omit redundant description.

Seventh Embodiment FIG. 7 shows a refrigeration apparatus Z7 according to a _seventh embodiment of the present invention. The refrigeration system Z ₇ is a development example of the refrigeration system Z ₆ according to the sixth embodiment. That is, in the refrigerating apparatus Z6 according to the _sixth embodiment, although two generators 11A and 11B are provided, the circulating system of the absorbing solution is configured to be shared by both of them.
In this embodiment, a dedicated absorption solution circulation system is provided for each of the generators 11A and 11B, and this point is the refrigeration system Z _{6 related} to the sixth circulation system.
And different.

The details are as follows. That is, the pressure reducing mechanism 21, the absorber 18, the solution pump 20, and the solution heat exchanger 19 are connected to the generator 11A through the flow path 52 and the flow path 53, and the evaporator is connected to the evaporator. 13A is connected, and these devices constitute one absorption solution circulation system. The generator 11B is connected to the flow path 4
The decompression mechanism 15, the absorber 14, the solution pump 16, and the solution heat exchanger 17 are connected through the flow path 6 and the flow path 47, and the evaporator 13B is connected to the absorber 14, and the other devices are connected by these devices. It constitutes the absorption solution circulation system.
In FIG. 7, reference numerals 22 and 23 are pressure reducing mechanisms.

With this configuration, the circulation system on the generator 11A side and the circulation system on the generator 11B side become independent, and the compression refrigeration system Za in each of the evaporators 13A and 13B of both the circulation systems. Side liquid refrigerant La
As shown in the During diagram shown in FIG. 8, the generation of the refrigerant vapor Ga ₁ is promoted in the low temperature region by both the heating by the exhaust heat and the heating by the discharge gas heat, and the exhaust heat temperature In a higher temperature range, the refrigerant vapor Ga ₁ is generated by heating by the discharge gas heat. As a result, the supercooling effect on the compression refrigeration system Za side of the liquid refrigerant La is ensured, refrigerating capacity of the refrigeration apparatus Z ₇ so that it is maintained high in a wider temperature range. That is, the present invention provides a heating means particularly suitable when the exhaust heat temperature is relatively low.

Since the configuration and operation and effects other than those described above are the same as those of the refrigerating apparatus Z6 according to the _sixth embodiment, each component in FIG. 7 corresponds to the configuration in FIG. The same reference numerals are given to the members, and the corresponding description in the sixth embodiment is used to omit redundant description.

Eighth Embodiment FIG. 9 shows a refrigeration apparatus Z8 according to an _eighth embodiment of the present invention. The refrigeration system Z ₈ is based on the configuration of the refrigeration system Z ₁ according to the _first embodiment, and in addition to the basic configuration, is provided with a four-way switching valve 5.
Is a heat pump type refrigeration apparatus that can selectively perform cooling and heating by the switching operation of (1). And, in particular,
In this embodiment, the use side heat exchanger 3 is configured to introduce the fluid to be heated Ld as a heat medium. That is, the use-side heat exchanger 3 is provided with the coil 34, the heated fluid Ld supplied through the flow path 56 is supplied to the coil 34, and the heated fluid Ld is supplied through the four-way switching valve 5. The condensed heat of the refrigerant vapor Ga ₁ is heated to produce hot water, and the warm water is used to heat the room. Then, in this case, from the viewpoint of utilizing the exhaust heat, the exhaust heat exchanger 24 having the exhaust heat introducing coil 35 is disposed in the flow path 56 of the fluid to be heated Ld,
The heated fluid Ld is heated by exhaust heat.

With this configuration, the exhaust heat can be effectively used for heating with a simple structure.

Since the configuration and operation and effects other than those described above are the same as those of the refrigerating apparatus Z1 according to the _first embodiment, here, the components shown in FIG. 8 correspond to the components shown in FIG. The same reference numerals are given to the members, and the corresponding description in the first embodiment is referred to to omit redundant description.

Ninth Embodiment FIG. 10 shows a refrigeration apparatus Z9 according to a _ninth embodiment of the present invention. The refrigeration system Z _9, similarly to the refrigeration apparatus Z ₈ according to the eighth embodiment, the structure of the refrigeration apparatus Z ₁ according to the first embodiment as a basic, in addition to such a basic configuration, the four-way A switching valve 5 is provided, and the four-way switching valve 5 is provided.
Is a heat pump type refrigeration apparatus that can selectively perform cooling and heating by the switching operation of (1). Then, the ninth according to an embodiment the refrigeration unit Z ₉ is different from the refrigeration system Z ₈ according to the eighth embodiment of the above use side heat exchanger in the refrigeration device Z ₈ embodiment said 8 Vessel 3
In contrast to the configuration in which the heated fluid Ld is introduced and heating is performed by the heat of the heated fluid Ld, the use-side heat exchanger 3 is of a normal refrigerant circulation type, while the use-side heat exchange is performed. A part of the liquid refrigerant La that has exited the heat exchanger 3 is diverted to the flow path 54 side, and the liquid refrigerant La is passed through a coil 35 for introducing exhaust heat.
Heating and evaporating in a waste heat exchanger 24 equipped with
The point is that the refrigerant vapor Ga ₂ is sucked into the compressor 1 at an intermediate pressure during the compression process.

With this configuration, the exhaust heat can be effectively used for heating with a simple structure, as in the case of the refrigeration system Z8 in the _eighth embodiment.

Since the configuration, operation and effect other than those described above are the same as those of the refrigeration systems Z ₁ and Z _{8 according to} the first and eighth embodiments, the respective components shown in FIG. The same reference numerals as those in FIG. 1 and FIG. 8 denote the same parts, and redundant description will be omitted by using the corresponding description in the first and eighth embodiments.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a refrigeration apparatus according to a first embodiment of the present invention.

FIG. 2 is a system configuration diagram of a refrigeration apparatus according to a second embodiment of the present invention.

FIG. 3 is a system configuration diagram of a refrigeration apparatus according to a third embodiment of the present invention.

FIG. 4 is a system configuration diagram of a refrigeration apparatus according to a fourth embodiment of the present invention.

FIG. 5 is a system configuration diagram of a refrigeration apparatus according to a fifth embodiment of the present invention.

FIG. 6 is a system configuration diagram of a refrigeration apparatus according to a sixth embodiment of the present invention.

FIG. 7 is a system configuration diagram of a refrigeration apparatus according to a seventh embodiment of the present invention.

8 is a During diagram of the refrigeration apparatus shown in FIG.

FIG. 9 is a system configuration diagram of a refrigeration apparatus according to an eighth embodiment of the present invention.

FIG. 10 is a system configuration diagram of a refrigeration apparatus according to a ninth embodiment of the present invention.

[Explanation of symbols]

1 is a compressor, 2 is a heat source side heat exchanger, 3 is an evaporator, 4 is a pressure reducing mechanism, 5 is a four-way switching valve, 11 is a generator, 11A is a generator, 11B is a generator, 12 is a condenser, 13 is an evaporator, 1
3A is an evaporator, 13B is an evaporator, 14 is an absorber, 15 is a decompression mechanism, 16 is a solution pump, 17 is a solution heat exchanger,
18 is an absorber, 19 is a solution heat exchanger, 20 is a solution pump, 21 is a decompression mechanism, 22 is a decompression mechanism, 23 is a decompression mechanism, 24 is a waste heat exchanger, 25 is a heat exchanger, and 31 to 35
The coil, 41-56 are flow path, Za is compression refrigeration system, Zb absorption refrigeration system, Z ₁ to Z ₉ is a refrigeration system.

Claims (9)

[Claims] 1. A compression refrigeration system (Za) comprising a compressor (1), a heat source side heat exchanger (2), a utilization side heat exchanger (3), and a pressure reducing mechanism (4), and a generator ( 11), a condenser (12), an evaporator (13), an absorber (14), and an absorption refrigeration system (Zb) including a pressure reducing mechanism (15), and the absorption refrigeration system (Zb). The above evaporator (13)
The liquid refrigerant from the heat source side heat exchanger (2) of the compression refrigeration system (Za) is guided to the evaporator (1).
A refrigeration apparatus characterized in that it is configured to supercool by the heat of evaporation in 3). 2. The compression refrigeration system (Z) according to claim 1, wherein the heat source of the generator (11) in the absorption refrigeration system (Zb) is a heat source.
A refrigeration system using the discharge gas heat of the discharge gas discharged from the compressor (1) of a). 3. The absorption refrigeration system (Zb) according to claim 2, wherein at least a part of heat radiation in the absorption refrigeration system (Zb) is transferred from the utilization side heat exchanger (3) side of the compression refrigeration system (Za). A refrigerating apparatus characterized by cooling by refrigerant vapor sucked into a compressor (1). 4. The compression refrigeration system (Za) according to claim 1 or 2, wherein a drive source of the compressor (1) in the compression refrigeration system (Za) is configured to use a driving force generated by combustion, and generated by the combustion. A refrigeration apparatus characterized in that waste heat is guided to the generator (11) in the absorption refrigeration system (Zb) and is used as a heat source of the generator (11). 5. A power generation facility or a cogeneration facility using an engine, a turbine, a fuel cell or the like as a driving source as a heat source of the generator (11) in the absorption refrigeration system (Zb). A refrigeration apparatus characterized by using external exhaust heat supplied from a refrigerator. 6. The refrigerant in the absorption refrigeration system (Zb) according to claim 1, 2, 3, 4, or 5,
A refrigeration apparatus using a fluorocarbon-based refrigerant. 7. The refrigerant in the compression refrigeration system (Za) according to claim 1, 2, 3, 4, 5, or 6,
A refrigeration apparatus using the same refrigerant as the refrigerant in the absorption refrigeration system (Zb). 8. The heat exchanger according to claim 1, wherein the use-side heat exchanger (3) functions as a condenser during heating, and the heat-source-side heat exchanger (2) functions as a condenser. In addition to being configured to function as an evaporator, the use-side heat exchanger (3) is configured to perform heat exchange between a refrigerant circulating in a refrigeration cycle and a fluid to be heated introduced from the outside. A refrigeration apparatus that heats a fluid to be heated by external exhaust heat from outside. 9. The heat source side heat exchanger (2) according to claim 1, wherein the use side heat exchanger (3) functions as a condenser during heating. It is configured to function as an evaporator, and at the time of heating, a part of the liquid refrigerant from the use side heat exchanger (3) is heated by external exhaust heat, and the refrigerant vapor generated thereby is sent to the compressor (1). A refrigeration apparatus characterized by being made to inhale.