JP2010243082A - Refrigerating device - Google Patents

Abstract

In a refrigeration apparatus configured by combining a vapor compression refrigeration machine and an absorption refrigeration machine, a performance improvement effect is obtained both during cooling operation and during heating operation.
In a refrigeration apparatus including a vapor compression refrigerator X and an absorption refrigerator Y, between the refrigerant of the vapor compression refrigerator X and the solution on the outlet side of the absorber 12 of the absorption refrigerator Y. A heat recovery heat exchanger 6 for performing heat exchange is provided. During the cooling operation of the vapor compression refrigeration machine X, the heat recovery heat exchanger 6 recovers the refrigerant heat on the vapor compression refrigeration machine X side to the solution side of the absorption refrigeration machine Y, and the refrigerant is absorbed into the absorption refrigeration machine Y. The evaporator 13 is supercooled to lower its evaporation temperature. During the heating operation of the vapor compression refrigeration machine X, the temperature of the refrigerant of the vapor compression refrigeration machine X is increased by heat exchange in the heat recovery heat exchanger 6 to increase the amount of heat released due to condensation of the refrigerant. As a result, the performance improvement effect of the vapor compression refrigerator X can be obtained both during the cooling operation and during the heating operation.
[Selection] Figure 1

Description

  The present invention relates to a refrigeration apparatus configured by combining a vapor compression refrigerator and an absorption refrigerator.

  As one of the methods for improving the performance of the vapor compression refrigerator, an absorption refrigerator is combined with the vapor compression refrigerator, the absorption refrigerator is driven using a gas engine or other exhaust heat as a heat source, A method of supercooling the refrigerant of the vapor compression refrigeration machine using the cold heat obtained here, or a method of reducing the condensation temperature of the refrigerant by cooling the refrigerant after compression of the vapor compression refrigeration machine using the obtained cold heat. A refrigeration apparatus that improves performance is known (see, for example, Patent Document 1).

  Further, in a refrigeration apparatus in which an absorption refrigeration machine is combined with a vapor compression refrigeration machine, as a method for further improving the performance as compared with the refrigeration apparatus disclosed in Patent Document 1, In addition to other waste heat, a technology that utilizes waste heat of a vapor compression refrigerator has also been proposed (see Patent Document 2).

JP 2004-28374 A JP 2006-17350 A

  However, in the technique shown in Patent Document 2, since the exhaust heat amount of the vapor compression refrigerator is small and the exhaust heat temperature is also low, even if this exhaust heat is used as a drive heat source for the absorption refrigerator, its effect is limited. However, it can be said that the practicality is limited because it is not large and it takes a lot of cost to combine the absorption refrigerator for using the exhaust heat.

  With regard to the refrigeration apparatus shown in Patent Document 2, the refrigeration apparatus focuses only on the performance improvement during the cooling operation, and is also due to the fact that the performance improvement during the heating operation is not considered. If the performance can be improved both at the time and during the heating operation, it is considered that the practicality will increase as a whole.

  Therefore, regarding the combination of the vapor compression refrigerator and the absorption refrigerator, the basic configuration is similar to the refrigeration apparatus described in Patent Document 2, but the absorption refrigerator described in Patent Document 2 is water-cooled. Although the absorption chiller is based on an air cooling system, a four-way switching valve is provided on the absorption chiller so that cooling and heating operations are possible as a conventional system. The circuit diagram is shown in FIG.

  In FIG. 6, symbol X is a vapor compression refrigerator, and Y is an absorption refrigerator. The vapor compression refrigerator X includes a compressor 1, a four-way switching valve 2, a use side heat exchanger 3, an expansion valve 4, a heat source side heat exchanger 7, and an accumulator 5. The absorption refrigerator Y includes a generator 11, an absorber 12, an evaporator 13, a condenser 14, a supercooling heat exchanger 15, a solution heat exchanger 16, and a solution pump 17.

  In this refrigeration apparatus, in order to supercool the refrigerant of the vapor compression refrigeration machine X in the evaporator 13 of the absorption refrigeration machine Y, between the use side heat exchanger 3 and the heat source side heat exchanger 7, The pipe 71 is connected to the heat exchanger 13a of the evaporator 13 of the absorption refrigeration machine Y, and the exhaust heat of the refrigerant on the vapor compression refrigeration machine X side is connected to the generator 11 of the absorption refrigeration machine Y. In order to use it as a driving heat source, a heat exchanger 11b in which a pipe line 72 between the heat source side heat exchanger 7 of the vapor compression refrigerator X and the four-way switching valve 2 is disposed in the generator 11 is provided. Connected to.

  With this configuration, during the cooling operation of the vapor compression refrigeration machine X, the refrigerant compressed by the compressor 1 is introduced into the generator 11, where the refrigerant in the generator 11 The refrigerant heat of the vapor compression refrigerator X is recovered to the solution side by heat exchange between them, and is used as a driving heat source for the generator 11. Further, the refrigerant of the vapor compression refrigeration machine is cooled or condensed by the atmosphere by the heat source side heat exchanger 7, and the refrigerant exiting the heat source side heat exchanger 7 flows into the evaporator 13 and is supercooled there. As the temperature decreases, the specific enthalpy of the refrigerant inlet in the usage-side heat exchanger 3 decreases, and the cooling capacity of the usage-side heat exchanger 3 improves. That is, during the cooling operation, the original purpose can be achieved by the configuration in which the vapor compression refrigerator X and the absorption refrigerator Y are combined. However, the amount of heat that can be recovered in the generator 11 by the refrigerant of the vapor compression refrigerator X is limited by the solution temperature in the generator 11 in which the absorption refrigerator Y can form a cycle. Therefore, the heat source side heat exchanger 7 for cooling the refrigerant of the vapor compression refrigerator X in the atmosphere is required.

  On the other hand, during the heating operation, the four-way switching valve 2 is switched and the refrigerant of the vapor compression refrigeration machine X flows in the opposite direction to the cooling operation, but the refrigerant after being compressed by the compressor 1 is used on the usage side. Heat is exchanged in the heat exchanger 3, passes through the pipe 54 from the heat exchanger 13 a in the evaporator 13 of the absorption refrigeration machine Y, absorbs heat from the atmosphere in the heat source side heat exchanger 7, and flows into the generator 11. . The operation of the cooling fan history of the condenser 14 and the supercooling heat exchanger 15 of the absorption refrigeration machine Y is stopped, and the engine is driven by the gas engine supplied from the pipe 60 or other exhaust heat. From the solution in the vessel 11, the refrigerant of the vapor compression refrigerator X in the generator 11 absorbs heat and returns to the compressor 1 through the four-way switching valve 2, but even if it is circulated by the solution pump 17, Since the heat exchanger 11b is disposed in the generator 11, the solution in the generator 11 and the refrigerant vapor on the vapor compression refrigeration machine X side, which is performed via the heat exchanger 11b. The heat exchange efficiency between them is very poor, and the effect of heating the refrigerant by the solution temperature to raise the evaporation temperature of the refrigerant is small, and as a result, there are few places that contribute to improving the performance of the vapor compression refrigerator X Become. Moreover, when the heat exchanger 11b in the generator 11 is enlarged in order to obtain the effect sufficiently, it is not practical because of the high cost of the heat exchanger corresponding to the effect.

  In this way, even if the refrigeration apparatus is configured as shown in FIG. 6 so that the cooling operation and the heating operation can be performed by combining the vapor compression refrigerator and the absorption refrigerator as shown in Patent Document 2, A great performance improvement effect cannot be expected both during operation and during heating operation. Therefore, it is still impractical.

  However, against the background of rising energy costs in recent years and the progress of development of air conditioners using natural refrigerants, there are issues of improving the performance of steam compression refrigerators and promoting the use of waste heat from the steam compression refrigerators However, not only does it take advantage of exhaust heat from gas engines and other wastewater, but it also uses the exhaust heat from the vapor compression refrigeration machine to convert it into cold heat to improve the performance during cooling operation and at the same time during heating operation. In Japan, the development of technology to further improve performance by effectively using the exhaust heat of the vapor compression refrigerator has been requested.

  Therefore, the present invention is mainly intended to obtain a performance improvement effect in both the cooling operation and the heating operation in the refrigeration apparatus configured by combining the vapor compression refrigerator and the absorption refrigerator. .

  In the present invention, the following configuration is adopted as a specific means for solving such a problem.

  In the first invention of the present application, in the refrigeration apparatus configured to include the vapor compression refrigeration machine X and the absorption refrigeration machine Y driven by exhaust heat of the engine or the like, the refrigerant of the vapor compression refrigeration machine X There is provided a heat recovery heat exchanger 6 for exchanging heat with the solution branched from the pipe 67 leading from the outlet of the absorber 12 of the absorption refrigerator Y to the solution heat exchanger 16 via the solution pump 17 and the solution. During the cooling operation of the vapor compression refrigeration machine X, the solution after the heat recovery of the refrigerant of the vapor compression refrigeration machine X by the heat recovery heat exchanger 6 flows into the generator 11 of the absorption refrigeration machine Y. In addition, the refrigerant of the vapor compression refrigeration machine X after heat recovery by the heat recovery heat exchanger 6 is supercooled in the evaporator 13 of the absorption refrigeration machine Y, and the heating of the vapor compression refrigeration machine X is performed. During operation, the four-way switching valve 2 is switched, and a vapor compression refrigerator The refrigerant after flowing in the direction opposite to the cooling operation is operated only in the solution pump 17 of the absorption refrigeration machine Y, and the refrigerant after being compressed by the compressor 1 is heat-exchanged by the use side heat exchanger 3. The heat recovery heat exchanger 6 returns to the compressor 1 from the heat exchanger 13a in the evaporator 13 of the absorption refrigerator Y through the pipe 54, and the heat recovery heat exchanger 6 performs the absorption refrigeration. The temperature of the refrigerant of the vapor compression refrigerator X is increased by heat exchange with the solution on the machine Y side.

  In the second invention of the present application, in the refrigeration apparatus according to the first invention, the solution flowing into the absorber 12 of the absorption chiller Y is passed through the supercooling heat exchanger 15 of the absorption chiller Y. It is characterized in that an indirect cooling method in which the refrigerant 12 flows into the absorber 12 after cooling is adopted.

  In the third invention of the present application, in the refrigeration apparatus according to the first or second invention, the solution flowing into the absorber 12 through the pipe line 64 on the outlet side of the absorber 12 of the absorption refrigerator Y. Branches into a pipe line 65 leading to the supercooling heat exchanger 15 and a pipe line 67 leading to the generator 11 through a solution heat exchanger 16 for exchanging heat between the solution from the generator 11. Further, the pipe 67 is branched into a pipe 71 leading to the heat recovery heat exchanger 6, and at least one of the pipe 65 and the pipe 67 is provided with electromagnetic valves 41 and 42. 41, 42 is configured to open during the cooling operation of the vapor compression refrigerator X and close during the heating operation.

  In the fourth invention of the present application, in the refrigeration apparatus according to the first or second invention, the solution flowing into the absorber 12 through the pipe line 64 on the outlet side of the absorber 12 of the absorption refrigerator Y. Branches into a pipe line 65 leading to the supercooling heat exchanger 15 and a pipe line 67 leading to the generator 11 through a solution heat exchanger 16 for exchanging heat between the solution from the generator 11. Further, the pipe 67 is branched into a pipe 71 leading to the heat recovery heat exchanger 6, while an electromagnetic valve 41 is provided in the pipe 65, and the evaporator 71 through the pipe 71 and the generator 11 are provided. Is connected by a line 73 provided with an electromagnetic valve 43, and during the cooling operation of the vapor compression refrigerator X, the electromagnetic valve 41 is opened, and the electromagnetic valve 43 is closed. The solenoid valve 41 is closed during the heating operation of the vapor compression refrigerator X. It is characterized by being configured so as to open the solenoid valve 43.

  In the fifth invention of the present application, in the refrigeration apparatus according to the first or second invention, the solution flowing into the absorber 12 through the pipe line 64 on the outlet side of the absorber 12 of the absorption refrigerator Y. Branches into a pipe line 65 leading to the supercooling heat exchanger 15 and a pipe line 67 leading to the generator 11 through a solution heat exchanger 16 for exchanging heat between the solution from the generator 11. Further, the pipe 67 is branched into a pipe 71 leading to the heat recovery heat exchanger 6, while the electromagnetic valve 41 is provided in the pipe 65 and the electromagnetic valve 42 is provided in the pipe 67. 71 and the evaporator 13 are connected by a pipe line 73 having an electromagnetic valve 43, and when the vapor compression refrigerator X is in cooling operation, both the electromagnetic valve 41 and the electromagnetic valve 42 are opened, and the electromagnetic valve 43 is closed, and during the heating operation of the vapor compression refrigerator X, Serial together closes the solenoid valve 41 and the solenoid valve 42, is characterized by being configured so as to open the solenoid valve 43.

  In the sixth invention of the present application, in the refrigeration apparatus according to the fourth or fifth invention, the solution spraying device 18 and the refrigerant liquid spraying device 19 in the evaporator 13 are configured separately or shared. It is characterized by a possible integrated configuration.

  According to a seventh invention of the present application, in the refrigeration apparatus according to the first, second, third, fourth, fifth or sixth invention, the evaporator 13 is replaced with a single refrigerant liquid of the absorption refrigerator Y. It is characterized in that it is configured to flow through the heat transfer surface of the evaporator 13 and to move the unvaporized refrigerant liquid to the absorber 12 side and be absorbed by the solution on the absorber 12 side.

  In the eighth invention of the present application, in the refrigeration apparatus according to the first, second, third, fourth, fifth, sixth or seventh invention, a plurality of the vapor compression refrigerators X are installed. Each of the vapor compression refrigeration machines X is provided with the heat recovery heat exchanger 6 to recover the exhaust heat of the refrigerant of each of the vapor compression refrigeration machines X, and is recovered by each of the heat recovery heat exchangers 6. The exhaust heat is configured to be supplied to the generator 11 of one absorption refrigerator Y.

  In the present invention, the following effects can be obtained.

(A) 1st invention of this application In 1st invention of this application, as illustrated in FIG. 1, it has the vapor | steam compression refrigerator X and the absorption refrigerator Y driven by exhaust heat, such as an engine. In the refrigeration apparatus configured, the refrigerant branched from the pipe 67 from the outlet of the absorber 12 of the vapor compression refrigerator X and the absorber 12 of the absorption refrigerator Y to the solution heat exchanger 16 via the solution pump 17 A heat recovery heat exchanger 6 that performs heat exchange between the two is provided. During the cooling operation of the vapor compression refrigeration machine X, the solution after heat exchange with the heat recovery heat exchanger 6 is caused to flow into the generator 11 of the absorption refrigeration machine Y and the heat recovery heat exchange is performed. The refrigerant of the vapor compression refrigeration machine X after heat exchange in the refrigerator 6 is supercooled in the evaporator 13 of the absorption refrigeration machine Y, and the four-way switching valve is used during the heating operation of the vapor compression refrigeration machine X. 2, the refrigerant of the vapor compression refrigerator X is caused to flow in the opposite direction to the cooling operation, only the solution pump 17 is operated, and the refrigerant after being compressed by the compressor 1 is transferred to the use side heat exchanger 3. Heat exchange is performed, and the heat exchanger 13a in the evaporator 13 of the absorption refrigeration machine Y returns from the heat recovery heat exchanger 6 to the compressor 1 through the pipe 54. In the heat recovery heat exchanger 6, the heat recovery heat exchanger 6 Vapor compression by heat exchange with solution on absorption refrigerator Y side So that increasing the temperature of the refrigerant of the refrigerator X.

  Therefore, the following functions and effects can be obtained during the cooling operation and the heating operation of the vapor compression refrigerator X, respectively.

  (A-1) According to the refrigeration apparatus according to the first invention of the present application, during the cooling operation of the vapor compression refrigeration machine X, the compressor 1 of the vapor compression refrigeration machine X in the heat recovery heat exchanger 6 is used. The refrigerant exhaust heat of the vapor compression refrigeration machine X is caused to flow into the generator 11 of the absorption refrigeration machine Y by flowing the solution after heat exchange with the refrigerant after being compressed in Compared to the case where the generator 11 is driven only by exhaust heat from an engine or the like, the effective use of exhaust heat is promoted. In addition, since heat recovery of the refrigerant of the vapor compression refrigerator X is performed in the heat recovery heat exchanger 6 by the absorber outlet solution of the absorption refrigerator Y and flows into the generator 11, the generator 11 in FIG. Considering that the heat exchange within the heat exchanger is more limited than the operation cycle of the absorption refrigeration machine Y, the heat exchange with the heat recovery heat exchanger 6 significantly increases the heat exchange, resulting in more exhaust heat. It can be used effectively.

  In addition, the refrigerant after heat exchange in the heat recovery heat exchanger 6 is supercooled in the evaporator 13 of the absorption refrigeration machine Y, so that the supercooling component is obtained on the vapor compression refrigeration machine X side. As a result, the evaporation temperature of the refrigerant in the use side heat exchanger 3 of the vapor compression refrigeration machine X is lowered, thereby improving the cooling performance of the vapor compression refrigeration machine X.

  Furthermore, by performing supercooling of the refrigerant of the vapor compression refrigerator X in the evaporator 13 of the absorption refrigerator Y, on the absorption refrigerator Y side, for example, cold water is supplied to the evaporator 13. Since the evaporation temperature of the refrigerant of the absorption refrigerating machine Y in the evaporator 13 can be increased as compared with the case of circulation, for example, when the required evaporation capacity is constant, the evaporation temperature for cold water Therefore, it is possible to reduce the cost of the evaporator 13 by reducing the capacity of the evaporator 13 and to make it compact.

  (A-2) On the other hand, during the heating operation of the vapor compression refrigerator X, in the absorption refrigerator Y, both the condenser 14 and the supercooling heat exchanger 15 are stopped, and the solution Only the pump 17 is operated. Further, the supply of exhaust heat to the generator 11 is continuously performed.

  Therefore, in the refrigerant heat recovery heat exchanger 6, heat exchange is performed between the solution on the absorption refrigerator Y side heated by exhaust heat and the refrigerant of the vapor compression refrigerator X reduced in pressure. The temperature of the refrigerant is increased by this heat exchange. As a result, the amount of heat release accompanying the condensation of the refrigerant in the use side heat exchanger 3 of the vapor compression refrigerator X increases, and the heating performance of the vapor compression refrigerator X is improved accordingly. The increase in the evaporation temperature during the heating operation also has an effect of reducing the driving power of the compressor 1 and contributes to the improvement of the heating performance. In addition, compared with the heat exchange with the solution of the absorption refrigerator Y in the generator 11 in FIG. 6 and the refrigerant | coolant of the vapor compression refrigerator X, the heat exchange in the heat recovery heat exchanger 6 is the amount of exchange heat. Is larger, and thus the heating performance is more improved.

  (A-3) As a synergistic effect of the effects described in the above (a-1) and (a-2), the performance improvement effect of the vapor compression refrigeration machine X is obtained both during the cooling operation and during the heating operation. A refrigeration apparatus rich in practicality can be obtained.

  (A-4) Furthermore, during the cooling operation of the vapor compression refrigeration machine X, the condensation of the refrigerant of the vapor compression refrigeration machine X is performed by heat recovery in the refrigerant heat recovery heat exchanger 6, and during the heating operation. Since the evaporation of the refrigerant of the vapor compression refrigerator X is performed by heat recovery in the refrigerant heat recovery heat exchanger 6, the heat radiation side provided as an essential component in the conventional vapor compression refrigerator The heat exchanger 7 is not required, the structure of the vapor compression refrigerator X can be simplified, and the cost can be reduced.

(B) Second invention of the present application In the second invention of the present application, in addition to the effects described in (a) above, the following specific effects are obtained. That is, according to the refrigeration apparatus according to the present invention, since the solution that flows into the absorber 12 of the absorption refrigerator Y is supercooled and then introduced into the absorber 12, an indirect cooling method is employed. The absorber 12 only absorbs the refrigerant vapor with the sensible heat of the inflow solution. For example, compared with a case where the absorber 12 cools the inflow solution and absorbs the refrigerant vapor, an excessive cooling is employed. Although a cooling heat exchanger 15 is separately required, the absorber 12 and the evaporator 11 can be easily integrated, so that the absorption evaporator can be made compact, and hence the absorption refrigerator Y Can be made compact.

(C) Third invention of the present application In the third invention of the present application, in addition to the effects described in the above (a) or (b), the following specific effects can be obtained. That is, in the refrigeration apparatus according to the present invention, as illustrated in FIG. 2, the solution flowing into the absorber 12 is supercooled through the pipe 64 on the outlet side of the absorber 12 of the absorption refrigerator Y. It branches into the pipe line 67 which leads to the said generator 11 through the solution heat exchanger 16 which performs heat exchange between the pipe line 65 which leads to the supercooling heat exchanger 15, and the solution from the said generator 11, and further this The pipe 67 is branched into a pipe 71 leading to the heat recovery heat exchanger 6, and electromagnetic valves 41 and 42 are provided in at least one of the pipe 65 and the pipe 67. The solenoid valves 41 and 42 are opened during the cooling operation of the vapor compression refrigerator X and closed during the heating operation.

  Therefore, the following functions and effects can be obtained during the cooling operation and the heating operation of the vapor compression refrigerator X, respectively.

(C-1) During cooling operation During the cooling operation of the vapor compression refrigeration machine X, the electromagnetic valves 41 and 42 are opened, and the circuit configuration thereof is the cooling operation of the refrigeration apparatus according to the first invention. This is the same as the circuit configuration at the time, and the same operational effects (see (a-1) above) can be obtained.

(C-2) Heating operation At the time of heating operation of the vapor compression refrigeration machine X, the following functions and effects can be obtained according to the installation mode of the solenoid valve. During the heating operation, in the absorption refrigerator Y, the operation of both the condenser 14 and the supercooling heat exchanger 15 is stopped, and only the solution pump 17 is operated. Further, the supply of exhaust heat to the generator 11 is continued.

(C-2-1) When electromagnetic valves 41 and 42 are provided in both the pipe 65 and the pipe 67 In this case, the absorber 12 is closed by closing the solenoid valve 41. And the operation of both the evaporator 13 is stopped. Further, when the electromagnetic valve 42 is closed, the solution of the absorption refrigerator Y only circulates between the refrigerant heat recovery heat exchanger 6 and the generator 11.

  As a result, the total amount of the solution on the outlet side of the absorber 12 flows into the refrigerant heat recovery heat exchanger 6 and exchanges heat with the refrigerant on the vapor compression refrigerator X side in the heat recovery heat exchanger 6. Is done. Therefore, the heat exchange in the heat recovery heat exchanger 6 increases the temperature of the refrigerant on the vapor compression refrigeration machine X side, and the amount of heat release accompanying the condensation of the refrigerant in the use side heat exchanger 3 increases. Accordingly, the heating performance of the vapor compression refrigerator X is improved. The increase in the evaporation temperature during the heating operation also has an effect of reducing the driving power of the compressor 1 and contributes to the improvement of the heating performance.

(C-2-2) When the electromagnetic valve 41 is provided only in the pipeline 65 leading to the supercooling heat exchanger 15 In this case, the absorber 12 and the electromagnetic valve 41 are closed by closing the electromagnetic valve 41. Both evaporators 13 are shut down. On the other hand, the solution on the outlet side of the absorber 12 is in a state where it can flow into the generator 11, but a solution heat exchanger 16 is provided in the pipe line 67 to the generator 11. Due to the flow resistance in the solution heat exchanger 16, the solution hardly flows into the generator 11, and almost the entire amount flows into the refrigerant heat recovery heat exchanger 6 side where the flow resistance is low.

  As a result, almost all of the solution on the outlet side of the absorber 12 flows into the refrigerant heat recovery heat exchanger 6, and in the heat recovery heat exchanger 6, the refrigerant and heat on the vapor compression refrigerator X side are heated. Exchanged. Therefore, the heat exchange in the heat recovery heat exchanger 6 increases the temperature of the refrigerant on the vapor compression refrigeration machine X side, and the refrigerant condenses in the use side heat exchanger 3 of the vapor compression refrigeration machine X. The amount of heat release accompanying the increase in the heating efficiency of the vapor compression refrigerator X is improved accordingly. The increase in the evaporation temperature during the heating operation also has an effect of reducing the driving power of the compressor 1 and contributes to the improvement of the heating performance.

(C-2-3) When the solenoid valve 42 is provided only in the pipe 67 leading to the generator 11 In this case, the solution of the absorption refrigeration machine Y is cooled by the operation of the solution pump 17. It merely circulates between the recovered heat exchanger 6 and the generator 11.

  As a result, the total amount of the solution on the outlet side of the absorber 12 flows into the refrigerant heat recovery heat exchanger 6 and exchanges heat with the refrigerant on the vapor compression refrigerator X side in the heat recovery heat exchanger 6. Is done. Therefore, the heat exchange in the heat recovery heat exchanger 6 increases the temperature of the refrigerant on the vapor compression refrigeration machine X side, and the refrigerant condenses in the use side heat exchanger 3 of the vapor compression refrigeration machine X. The amount of heat release accompanying the increase in the heating efficiency of the vapor compression refrigerator X is improved accordingly. The increase in the evaporation temperature during the heating operation also has an effect of reducing the driving power of the compressor 1 and contributes to the improvement of the heating performance.

  (C-2-4) As described above, the heating performance of the vapor compression refrigeration machine X is improved regardless of the installation mode of the electromagnetic valve.

  (C-3) As a synergistic effect of the effects described in the above (c-1) and (c-2), the performance improvement effect of the vapor compression refrigeration machine X is obtained both during the cooling operation and during the heating operation. A refrigeration apparatus rich in practicality can be obtained.

(D) 4th invention of this application In the 4th invention of this application, in addition to the effect as described in said (a) or (b), the following specific effects are acquired. That is, in the refrigeration apparatus according to the present invention, as illustrated in FIG. 3, the solution flowing into the absorber 12 is supercooled through the pipe 64 on the outlet side of the absorber 12 of the absorption refrigerator Y. It branches into the pipe line 67 which leads to the said generator 11 through the solution heat exchanger 16 which performs heat exchange between the pipe line 65 which leads to the supercooling heat exchanger 15, and the solution from the said generator 11, and further this The pipe 67 is branched into a pipe 71 leading to the heat recovery heat exchanger 6, while the solenoid valve 41 is provided in the pipe 65 and flows into the evaporator 13 from the pipe 71 and the generator 11. The pipe 62 is connected by a pipe 73 provided with an electromagnetic valve 43, the electromagnetic valve 41 is opened during the cooling operation of the vapor compression refrigerator X, the electromagnetic valve 43 is closed, and the vapor compression is performed. When heating the refrigerator-type refrigerator X, the solenoid valve 41 is closed to To open the valve 43.

  Therefore, the following functions and effects can be obtained during the cooling operation and the heating operation of the vapor compression refrigerator X, respectively.

(D-1) At the time of air-cooling operation At the time of air-cooling operation of the vapor compression refrigerator X, the electromagnetic valve 41 is opened and the electromagnetic valve 43 is closed. The circuit configuration at the time of the cooling operation of the refrigeration apparatus according to the present invention is the same, and the same effect (see (a-1) above) is obtained.

(D-2) During heating operation During the heating operation of the vapor compression refrigeration machine X, in the absorption refrigeration machine Y, the operation of both the condenser 14 and the supercooling heat exchanger 15 is stopped. Only the solution pump 17 is operated. Further, the supply of exhaust heat to the generator 11 is continued. Further, the solenoid valve 41 is closed and the solenoid valve 43 is opened.

  Therefore, the solution on the outlet side of the absorber 12 flows into the generator 11, the refrigerant heat recovery heat exchanger 6 and the evaporator 13, respectively. Since the exchanger 16 is provided, the solution hardly flows into the generator 11 due to the flow resistance in the solution heat exchanger 16, and the evaporator 13 and the refrigerant heat recovery heat exchange with low flow resistance. Almost the entire amount flows into the container 6 side. As a result, in both the refrigerant heat recovery heat exchanger 6 and the evaporator 13, heat exchange is performed between the solution on the absorption refrigerator Y side and the refrigerant on the vapor compression refrigerator X side, Due to this heat exchange, the temperature of the refrigerant is increased, and the amount of heat release accompanying the condensation of the refrigerant in the use side heat exchanger 3 of the vapor compression refrigeration machine X is increased, so that the heating of the vapor compression refrigeration machine X is increased accordingly. Performance will be improved. The increase in the evaporation temperature during the heating operation also has an effect of reducing the driving power of the compressor 1 and contributes to the improvement of the heating performance.

  (D-3) As a synergistic effect of the effects described in the above (d-1) and (a-2), the performance improvement effect of the vapor compression refrigeration machine X is obtained in both the cooling operation and the heating operation. A refrigeration apparatus rich in practicality can be obtained.

(E) Fifth Invention of the Present Application In the fifth invention of the present application, in addition to the effects described in the above (a) or (b), the following specific effects can be obtained. That is, in the refrigeration apparatus according to the present invention, as illustrated in FIG. 4, the solution flowing into the absorber 12 is supercooled through the pipe 64 on the outlet side of the absorber 12 of the absorption refrigerator Y. It branches into the pipe line 67 which leads to the said generator 11 through the solution heat exchanger 16 which performs heat exchange between the pipe line 65 which leads to the supercooling heat exchanger 15, and the solution from the said generator 11, and further this The pipe 67 is branched into a pipe 71 leading to the heat recovery heat exchanger 6, while the electromagnetic valve 41 is provided in the pipe 65 and the electromagnetic valve 42 is provided in the pipe 67. The evaporator 13 is connected by a pipe line 73 provided with an electromagnetic valve 43. The solenoid valve 41 and the solenoid valve 42 are both opened during the cooling operation of the vapor compression refrigerator X, the solenoid valve 43 is closed, and the solenoid valve 43 is heated during the heating operation of the vapor compression refrigerator X. Both the valve 41 and the electromagnetic valve 42 are closed, and the electromagnetic valve 43 is opened.

  Therefore, the following functions and effects can be obtained during the cooling operation and the heating operation of the vapor compression refrigerator X, respectively.

(E-1) During cooling operation During cooling operation of the vapor compression refrigerator X, the solenoid valve 41 and the solenoid valve 42 are both opened, and the solenoid valve 43 is closed. The circuit configuration is the same as that in the cooling operation of the refrigeration apparatus according to the first aspect of the invention, and the same operational effects (see (a-1) above) are obtained.

(E-2) During heating operation During the heating operation of the vapor compression refrigeration machine X, in the absorption refrigeration machine Y, the operation of both the condenser 14 and the supercooling heat exchanger 15 is stopped. Only the solution pump 17 is operated. Further, the supply of exhaust heat to the generator 11 is continued. Further, both the solenoid valve 41 and the solenoid valve 42 are closed, and only the solenoid valve 43 is opened.

  Therefore, the solution on the outlet side of the absorber 12 flows into the refrigerant heat recovery heat exchanger 6 and the evaporator 13, respectively, and the solution that flows out of the refrigerant heat recovery heat exchanger 6 flows into the generator 11. Inflow. Therefore, in both the refrigerant heat recovery heat exchanger 6 and the evaporator 13, heat exchange is performed between the solution on the absorption refrigeration machine Y side and the refrigerant on the vapor compression refrigeration machine X side, Due to this heat exchange, the temperature of the refrigerant is increased, and the amount of heat dissipated with the condensation of the refrigerant in the use side heat exchanger 3 of the vapor compression refrigeration machine X is increased, so that the heating performance of the vapor compression refrigeration machine X is increased accordingly. Will be improved. The increase in the evaporation temperature during the heating operation also has an effect of reducing the driving power of the compressor 1 and contributes to the improvement of the heating performance.

  (E-3) As a synergistic effect of the effects described in the above (e-1) and (e-2), the performance improvement effect of the vapor compression refrigeration machine X is obtained both in the cooling operation and in the heating operation. A refrigeration apparatus rich in practicality can be obtained.

(F) Sixth invention of the present application In the sixth invention of the present application, in addition to the effects described in (d) or (e) above, the following specific effects can be obtained. That is, in the refrigeration apparatus according to the present invention, as illustrated in FIGS. 4 and 5, the sprayer 18 for spraying the solution and the sprayer 19 for spraying the refrigerant liquid in the evaporator 13 can be configured separately or shared. It has a one-piece construction.

  Therefore, in the case where the solution spraying device 18 and the coolant spraying device 19 are configured separately, the evaporator 13 of the coolant spraying device 19 that is originally provided for the coolant spraying is used. The structure or installation position of the solution spraying device 18 is set so that the solution is properly sprayed to the heat exchanger of the evaporator 13 while maintaining the proper spraying state of the refrigerant to the heat exchanger. can do.

  Further, in the case where the solution spraying device 18 and the refrigerant solution spraying device 19 are integrated, the evaporator 13 can be made compact and low in cost by narrowing the space for the spraying device. I can plan.

(G) 7th invention of this application In 7th invention of this application, in addition to the effect as described in said (a), (b), (c), (d), (e) or (f), the following Such unique effects can be obtained. That is, in the refrigeration apparatus according to the present invention, as illustrated in FIGS. 1 to 5, the refrigerant liquid of the absorption refrigeration machine Y flows through the evaporator 13 temporarily through the heat transfer surface of the evaporator 13. Since the non-evaporated refrigerant liquid moves to the absorber 12 side and is absorbed by the solution on the absorber 12 side, for example, as compared with the case where the evaporator 13 is a circulation type. Thus, the evaporator 13 and the absorber 12 installed adjacent to the evaporator 13 can be integrated to be compact, and the refrigeration constructed by combining the vapor compression refrigerator X and the absorption refrigerator Y. The apparatus can be made compact.

(H) Eighth Invention of the Present Application In the eighth invention of the present application, the effect described in (a), (b), (c), (d), (e), (f) or (g) is achieved. In addition, the following specific effects can be obtained. That is, in the refrigeration apparatus according to the present invention, as illustrated in FIG. 5, a plurality of the vapor compression refrigeration machines X are installed, and the heat recovery heat exchanger 6 is installed in each of the vapor compression refrigeration machines X. Provided to recover the exhaust heat of the refrigerant of each vapor compression refrigerator X and supply the exhaust heat recovered by each heat recovery heat exchanger 6 to the generator 11 of one absorption refrigerator Y Since the amount of recovered heat from the refrigerant side of the vapor compression refrigeration machine X to the generator 11 side of the absorption refrigeration machine Y increases, even when there is little exhaust heat from the engine, etc. The absorption refrigerator Y can be properly operated, and as a result, the refrigerant of the vapor compression refrigerator X can be sufficiently subcooled by heat exchange in the evaporator 13 of the absorption refrigerator Y. As a result, the performance improvement effect of the entire refrigeration system Rukoto can.

1 is an overall circuit diagram of a refrigeration apparatus according to a first embodiment of the present invention. It is a whole circuit diagram of the freezing apparatus which concerns on 2nd Embodiment of this invention. It is a whole circuit diagram of the freezing apparatus which concerns on 3rd Embodiment of this invention. It is a whole circuit diagram of the freezing apparatus which concerns on 4th Embodiment of this invention. It is a whole circuit diagram of the freezing apparatus which concerns on 5th Embodiment of this invention. It is a whole circuit diagram of the conventional freezing apparatus.

  Hereinafter, the present invention will be specifically described based on preferred embodiments.

I: First Embodiment FIG. 1 shows a circuit configuration of a refrigeration apparatus Z according to a first embodiment of the present invention. This refrigeration apparatus Z is configured by combining a vapor compression refrigeration machine X and an absorption refrigeration machine Y described below, and is used for indoor air conditioning.

I-1: Configuration of Vapor Compression Refrigerator X The vapor compression refrigeration machine X includes a compressor 1, a four-way switching valve 2, a use side heat exchanger 3 (that is, an indoor unit), an expansion valve 4, and an accumulator. 5 are connected by a pipe 51 to a pipe 57, and a cooling operation and a heating operation are selectively realized by a switching operation of the four-way switching valve 2. That is, the four-way switching valve 2 is provided in the discharge-side pipe 51 of the compressor 1, and the pipe 51 reaches the use-side heat exchanger 3 by switching the four-way switching valve 2. The pipeline 52 (during heating operation) and the pipeline 56 (during cooling operation) leading to the accumulator 5 are selectively switched, and the use side heat exchanger 3 performs refrigerant evaporation during cooling operation, thereby heating operation. Sometimes the refrigerant condenses.

I-2: Configuration of Absorption Refrigerator Y The absorption chiller Y has, for example, a function of absorbing and releasing (regenerating) refrigerant into the absorbing liquid using lithum bromide (LiBr) as an absorbing liquid and water as a refrigerant. Refrigeration is performed by using a generator 11, an air-cooled condenser 14, an adjacently disposed absorber 12 and evaporator 13, an air-cooled supercooling heat exchanger 15, and a solution. A heat exchanger 16 and a solution pump 17 are provided, and these components are connected by a pipeline 61 to a pipeline 67.

  The generator 11 is basically driven by using exhaust heat from an engine or the like as a drive heat source, and a heat exchanger 11a for exhaust heat is provided to exchange heat between the exhaust heat and the solution. Built-in. The generator 11 is connected to a discharge-side pipe 72 of a heat recovery heat exchanger 6 described later in order to take in the exhaust heat of the vapor compression refrigerator X as a driving heat source.

  Furthermore, the upper part of the generator 11 and the condenser 14 are connected by a pipe 61 so that the refrigerant vapor (water vapor) generated by the generator 11 flows into the condenser 14 and condenses.

  Further, the generator 11 is provided with a pipe line 67 from the solution pump 17 and a pipe line 63 connected to an outlet side of the absorber 12 which will be described later. As the dilute solution is introduced, the concentrated solution concentrated in the generator 11 is sent from the pipe 63 to the outlet side of the absorber 12.

  The solution heat exchanger 16 is interposed between the pipe line 67 from the outlet side of the absorber 12 toward the generator 11 and the pipe line 63 from the generator 11 toward the outlet side of the absorber 12. In the solution heat exchanger 16, heat exchange is performed between the concentrated solution flowing through the pipe line 63 and the dilute solution flowing through the pipe line 67, and heat is recovered from the concentrated solution side to the diluted solution side. .

  The absorber 12 absorbs the refrigerant vapor generated in the evaporator 13 described below into a supercooled solution to form a dilute solution. The solution after being supercooled by the exchanger 15 is introduced.

  The evaporator 13 has a temporary evaporation function and includes a heat exchanger 13a. Then, the liquid refrigerant condensed in the condenser 14 is introduced from the pipe 62, and the refrigerant flows down the surface of the heat exchanger 13a, whereby the fluid flowing in the heat exchanger 13a (this embodiment) In the embodiment, as will be described later, the refrigerant is heated and evaporated by the vapor compression refrigerator X side refrigerant) to generate refrigerant vapor.

  The refrigerant vapor generated in the evaporator 13 flows into the absorber 12 and is absorbed by the supercooled solution flowing from the supercooling heat exchanger 15 side in the absorber 12. Further, the non-evaporated refrigerant in the evaporator 13 also flows into the absorber 12 side and is absorbed by the solution in the absorber 12.

  The solution (dilute solution) on the outlet side of the absorber 12 is sent to the supercooling heat exchanger 15, the generator 11, and the refrigerant heat recovery heat exchanger 6 by the solution pump 17.

I-3: Specific Configuration Here, in the refrigeration apparatus Z, heat exchange between the refrigerant of the vapor compression refrigeration machine X and the solution refluxed to the generator 11 of the absorption refrigeration machine Y, In order to realize the heat exchange between the refrigerant of the vapor compression refrigerator X and the solution on the evaporator 13 side of the absorption refrigerator Y, the following specific configurations are provided.

  That is, the pipes 53 and 54 of the vapor compression refrigerator X are connected to both ends of the heat exchanger 13a of the evaporator 13 of the absorption refrigerator Y, and during the cooling operation of the vapor compression refrigerator X, The refrigerant after being compressed by the compressor 1 is supercooled by the evaporator 13.

  Furthermore, a heat recovery heat exchanger 6 is provided between the vapor compression refrigeration machine X and the absorption refrigeration machine Y, and the solution is heated via the pipe 71 branched from the pipe 67 of the absorption refrigeration machine Y. After flowing into the recovery heat exchanger 6, the refrigerant is refluxed to the generator 11 through the pipe 72, and one end of the heat exchanger 6 a built in the refrigerant heat recovery heat exchanger 6 is connected to the generator 11. The other end of the vapor compression refrigeration machine X is connected to the pipe 54, and the other end is connected to the pipe 55. The solution on the absorption refrigeration machine Y side and the vapor compression refrigeration machine X in the refrigerant heat recovery heat exchanger 6 are connected. Heat exchange is performed between the refrigerants on the side.

I-4: Explanation of Operation of Refrigeration Apparatus Z I-4-a: During Cooling Operation During the cooling operation of the vapor compression refrigeration machine X, the absorption chiller Y is also operated simultaneously. The high-temperature refrigerant (gas refrigerant) after being compressed in the compressor 1 of the vapor compression refrigerator X is the refrigerant heat recovery heat exchanger 6 heat exchanger 6a and the heat exchanger of the evaporator 13. It flows through 13a sequentially. On the other hand, a part of the solution (dilute solution) on the outlet side of the absorber 12 of the absorption refrigerator Y flows into the refrigerant heat recovery heat exchanger 6 through the pipe 71, and each heat exchanger 6a. After flowing outside, is returned to the generator 11 side.

  In this case, in the refrigerant heat recovery heat exchanger 6, heat exchange is performed between the gas refrigerant on the vapor compression refrigeration machine X side flowing in the heat exchanger 6a and the solution flowing outside the heat exchanger 6a. The refrigerant heat on the vapor compression refrigerator X side is recovered to the solution side of the absorption refrigerator Y. Therefore, the amount of heat recovered by the solution flowing into the generator 11 is added to the amount of heat generated by exhaust heat from the engine or the like supplied through the pipe 60, and the generator 11 is driven using this total amount of heat as a driving heat source.

  As a result, compared with the case where the generator 11 is driven only by exhaust heat from the engine or the like, the effective use of exhaust heat is promoted by the amount of use of refrigerant exhaust heat on the vapor compression refrigerator X side, for example, Even when the amount of exhaust heat from the engine or the like is reduced, the absorption refrigerator Y can be operated.

  On the other hand, the gas refrigerant on the vapor compression refrigeration machine X side flowing into the refrigerant heat recovery heat exchanger 6 is condensed into a liquid refrigerant by a cooling action by heat exchange with the solution in the heat recovery heat exchanger 6. The Therefore, as a result of the refrigerant condensing action being performed in the refrigerant heat recovery heat exchanger 6, it is necessary to provide the heat source side heat exchanger, which is an essential component in the conventional configuration, on the vapor compression refrigerator X side. Accordingly, the structure of the vapor compression refrigerator X can be simplified and the cost can be reduced accordingly.

  Further, the refrigerant (liquid refrigerant) on the vapor compression refrigerator X side condensed by heat exchange in the refrigerant heat recovery heat exchanger 6 is further a heat exchanger of the evaporator 13 of the absorption refrigerator Y. 13a, is supercooled by heat exchange with the solution flowing outside the heat exchanger 13a, is depressurized by the expansion valve 4 as a supercooled refrigerant, and then flows into the user side heat exchanger 3. It evaporates here. In this case, since the refrigerant temperature is lowered due to the supercooling in the evaporator 13, the specific enthalpy temperature of the inlet refrigerant in the use side heat exchanger 3 is lowered and the heat is dissipated in the use side heat exchanger 3. The amount of cold heat increases, and the cooling performance of the vapor compression refrigerator X is improved accordingly.

I-4-b: During heating operation During the heating operation of the vapor compression refrigeration machine X, the operation of the condenser 14 and the supercooling heat exchanger 15 of the absorption refrigeration machine Y is stopped, and only the solution pump 17 is used. And the solution in the generator 11 is circulated. Further, the supply of exhaust heat to the generator 11 is continued.

  When the vapor compression refrigeration machine X is heated in this state, the refrigerant compressed by the compressor 1 is condensed in the use side heat exchanger 3 and then decompressed in the expansion valve 4. The absorption refrigeration machine 6 enters the heat exchanger 6a of the refrigerant heat recovery heat exchanger 6 through the heat exchanger 13a of the evaporator 13 of the absorption refrigeration machine Y, and the heat recovery heat exchanger 6 uses the absorption refrigeration machine. It evaporates by heat exchange with the Y-side solution, and is sucked into the compressor 1 through the accumulator 5. And the refrigerant | coolant after compressed with the compressor 1 condenses in the said utilization side heat exchanger 3, and indoor heating is implement | achieved by the condensed heat.

  In this case, the solution flowing into the refrigerant heat recovery heat exchanger 6, that is, a solution having a high temperature that is not subjected to heat exchange in the solution heat exchanger 16, and the use side heat exchange of the vapor compression refrigerator X are used. Since heat exchange is performed with the refrigerant whose pressure has been reduced after the condensation in the cooler 3, in other words, the solution temperature on the absorption refrigerator Y side is used as the evaporation heat source of the refrigerant, the evaporation of the refrigerant The temperature is higher than, for example, the case where air temperature is used as the evaporation heat source of the refrigerant, and the amount of heat release accompanying the condensation of the refrigerant in the use-side heat exchanger 3 is increased accordingly. The heating performance of the vapor compression refrigerator X is improved. The increase in the evaporation temperature during the heating operation also has an effect of reducing the driving power of the compressor 1 and contributes to the improvement of the heating performance.

  As described above, by improving the performance of the vapor compression refrigeration machine X both during the cooling operation and during the heating operation, a practical refrigeration apparatus can be obtained.

  During the cooling operation of the vapor compression refrigerator X, the refrigerant of the vapor compression refrigerator X is condensed by heat recovery in the refrigerant heat recovery heat exchanger 6, and during the heating operation, Since the refrigerant in the compression refrigerator X is evaporated by the heat recovery in the refrigerant heat recovery heat exchanger 6, the heat radiation side heat exchanger provided as an indispensable component in the conventional vapor compression refrigerator. Therefore, the structure of the vapor compression refrigerator X can be simplified and the cost can be reduced accordingly.

II: Second Embodiment FIG. 2 shows a circuit configuration of a refrigeration apparatus Z according to a second embodiment of the present invention. This refrigeration apparatus Z is based on the circuit configuration of the refrigeration apparatus Z according to the first embodiment. In this basic circuit, the outlet of the absorber 12 of the absorption chiller Y and the supercooling heat exchanger 15 are used. The solenoid valve 41 is provided in the pipe line 65 that connects the solenoid valve 42, the solenoid valve 42 is provided in the pipe line 67 that connects the outlet of the absorber 12 and the generator 11, and the solenoid valve 41 and the solenoid valve 42 are provided. In both cases, the operation mode is set so that the valve is opened during the cooling operation and closed during the heating operation.

  Accordingly, during the cooling operation of the vapor compression refrigeration machine X, the electromagnetic valves 41 and 42 are both opened, and therefore, the configuration in which these electromagnetic valves 41 and 42 are not provided, that is, the first It is the same as the circuit configuration at the time of cooling operation in the embodiment, and the same operational effects can be obtained. Therefore, for the operational effects during the cooling operation, the corresponding description of the first embodiment is used, and the description here is omitted.

  On the other hand, during the heating operation of the vapor compression refrigerator X, electromagnetic valves 41 and 42 are provided in both the pipe 65 and the pipe 67, and both are closed. Further, in this case, in the absorption refrigeration machine Y, the operation of the condenser 14 and the supercooling heat exchanger 15 is stopped, only the solution pump 17 is operated, and the exhaust heat to the generator 11 is exhausted. Supply will continue.

  When the vapor compression refrigeration machine X is heated in this state, the refrigerant compressed by the compressor 1 is condensed in the use side heat exchanger 3 and then decompressed in the expansion valve 4. The absorption refrigeration machine 6 enters the heat exchanger 6a of the refrigerant heat recovery heat exchanger 6 through the heat exchanger 13a of the evaporator 13 of the absorption refrigeration machine Y, and the heat recovery heat exchanger 6 uses the absorption refrigeration machine. It evaporates by heat exchange with the Y-side solution, and is sucked into the compressor 1 through the accumulator 5. And the refrigerant | coolant after compressed with the compressor 1 condenses in the said utilization side heat exchanger 3, and indoor heating is implement | achieved by the condensed heat.

  In this case, since both the electromagnetic valves 41 and 42 are closed on the absorption refrigerator Y side, the solution on the outlet side of the absorber 12 is generated from the refrigerant heat recovery heat exchanger 6 and the generation. Circulate between the vessels 11. Therefore, the refrigerant on the vapor compression refrigeration machine X side is heated by heat exchange with the solution on the absorption refrigeration machine Y side in the heat recovery heat exchanger 6, and the evaporation temperature thereof is further increased. The amount of heat release accompanying the condensation of the refrigerant in the use-side heat exchanger 3 is increased, whereby the heating performance of the vapor compression refrigerator X is improved. The increase in the evaporation temperature during the heating operation also has an effect of reducing the driving power of the compressor 1 and contributes to the improvement of the heating performance.

  In this embodiment, the conduit 65 leading from the outlet side of the absorber 12 to the supercooling heat exchanger 15 and the conduit 67 leading from the outlet side of the absorber 12 to the generator 11 are respectively provided. Although the solenoid valves 41 and 42 are provided, the present invention is not limited to such a valve arrangement configuration. For example, the solenoid valve 41 is provided only on the pipeline 65 or the solenoid valve 41 is provided only on the pipeline 67. The structure provided can also be employ | adopted and in either case, the same effect as the case where the solenoid valves 41 and 42 are provided in both the said pipe line 65 and the said pipe line 67 is acquired.

That is, when the solenoid valve 41 is provided only in the pipe line 65 leading to the supercooling heat exchanger 15, the solenoid valve 41 is closed so that the outlet side of the absorber 12 is closed. The solution is
Although it will be in the state which can flow into both the said generator 11 and the said refrigerant | coolant heat recovery heat exchangers 6, since the solution heat exchanger 16 is provided in the pipe line 67 to this generator 11, this solution Due to the flow resistance in the heat exchanger 16, the solution hardly flows into the generator 11, and almost the entire amount flows into the refrigerant heat recovery heat exchanger 6 side where the flow resistance is low.

  As a result, the heat exchange in the heat recovery heat exchanger 6 further increases the evaporating temperature of the refrigerant on the vapor compression refrigeration machine X side, and accordingly, the refrigerant accompanying the condensation of the refrigerant in the use side heat exchanger 3 is released. The amount of heat increases, thereby improving the heating performance of the vapor compression refrigerator X. The increase in the evaporation temperature during the heating operation also has an effect of reducing the driving power of the compressor 1 and contributes to the improvement of the heating performance.

  On the other hand, when the solenoid valve 42 is provided only in the pipeline 67 leading to the generator 11, the solution on the outlet side of the absorber 12 is exchanged by the solution pump 17 with the supercooling heat exchange. However, since the supercooling heat exchanger 15 is in an operation stop state, the absorber 12 is deactivated. Therefore, when the solenoid valve 42 is closed, only in the refrigerant heat recovery heat exchanger 6, heat exchange is performed between the solution on the absorption refrigeration machine Y side and the refrigerant on the vapor compression refrigeration machine X side. Will be performed.

  As a result, the heat exchange in the heat recovery heat exchanger 6 further increases the evaporating temperature of the refrigerant on the vapor compression refrigeration machine X side, and accordingly, the refrigerant accompanying the condensation of the refrigerant in the use side heat exchanger 3 is released. The amount of heat increases, thereby improving the heating performance of the vapor compression refrigerator X. The increase in the evaporation temperature during the heating operation also has an effect of reducing the driving power of the compressor 1 and contributes to the improvement of the heating performance.

III: Third Embodiment FIG. 3 shows a circuit configuration of a refrigeration apparatus Z according to a third embodiment of the present invention. This refrigeration apparatus Z is positioned as a modified example of the refrigeration apparatus Z according to the second embodiment. That is, in the second embodiment, the electromagnetic valve 41 is provided in the conduit 65 connecting the outlet side of the absorber 12 of the absorption refrigeration machine Y and the supercooling heat exchanger 15, and the absorber 12 In the third embodiment, the electromagnetic valve 41 is provided in the pipe 65 in the third embodiment, whereas the electromagnetic valve 42 is provided in the pipe 67 extending from the outlet of the pipe to the generator 11. However, instead of attaching the electromagnetic valve 42 to the pipe 67, the pipe 73 is branched from a pipe 71 connecting the outlet of the absorber 12 and the refrigerant heat recovery heat exchanger 6, and this pipe The path 73 is connected in the middle of the pipeline 62 from the generator 11, and the solenoid valve 43 is provided in the pipeline 73.

  During the cooling operation of the vapor compression refrigeration machine X, the electromagnetic valve 41 is opened and the electromagnetic valve 43 is closed, while during the heating operation of the vapor compression refrigeration machine X, the electromagnetic valve 41 is turned off. The operation mode of each of the solenoid valves 41 and 43 is set so that the solenoid valve 43 is opened and the solenoid valve 43 is opened.

  Therefore, in the refrigeration apparatus Z of this embodiment, the following functions and effects can be obtained during the cooling operation and the heating operation of the vapor compression refrigerator X, respectively.

  During the cooling operation of the vapor compression refrigeration machine X, the absorption refrigeration machine Y is in an operating state. In this state, the solenoid valve 41 is opened and the solenoid valve 43 is closed, so that the circuit configuration is the same as the circuit configuration during the cooling operation of the refrigeration apparatus Z according to the first embodiment. The same effect as this can be obtained. Therefore, for the operational effects during the cooling operation, the corresponding description of the first embodiment is used, and the description here is omitted.

  On the other hand, during the heating operation of the vapor compression refrigerator X, the electromagnetic valve 41 is closed and the electromagnetic valve 43 is opened. In the absorption refrigerator Y, the operation of the condenser 14 and the supercooling heat exchanger 15 is stopped, only the solution pump 17 is operated, and the exhaust heat is supplied to the generator 11. Will continue.

  In this state, when the vapor compression refrigerator X is heated, the electromagnetic valve 41 is closed and the electromagnetic valve 43 is opened. Therefore, the solution on the outlet side of the absorber 12 is The refrigerant flows into the generator 11, the refrigerant heat recovery heat exchanger 6 and the evaporator 13, respectively. Since the solution heat exchanger 16 is provided in the pipe line 67 to the generator 11, the solution Due to the flow resistance in the heat exchanger 16, the solution hardly flows into the generator 11, and almost the entire amount flows into the evaporator 13 and the refrigerant heat recovery heat exchanger 6 side with low flow resistance.

  As a result, in both the refrigerant heat recovery heat exchanger 6 and the evaporator 13, heat exchange is performed between the solution on the absorption refrigerator Y side and the refrigerant on the vapor compression refrigerator X side, The evaporating temperature of the refrigerant is further increased, and accordingly, the amount of heat released due to the condensation of the refrigerant in the use side heat exchanger 3 is increased, thereby improving the heating performance of the vapor compression refrigerator X. Become. The increase in the evaporation temperature during the heating operation also has an effect of reducing the driving power of the compressor 1 and contributes to the improvement of the heating performance.

IV: Fourth Embodiment FIG. 4 shows a circuit configuration of a refrigeration apparatus Z according to a fourth embodiment of the present invention. This refrigeration apparatus Z is positioned as a modified example of the refrigeration apparatus Z according to the second embodiment. That is, in the second embodiment, the solenoid valve 41 is connected to the conduit 65 connecting the outlet of the absorber 12 and the supercooling heat exchanger 15 of the absorption refrigerator Y, and the outlet of the absorber 12 and the above. Whereas the electromagnetic valve 42 is provided in each of the pipe lines 67 connecting the generator 11, in the fourth embodiment, in addition to the electromagnetic valve 41 and the electromagnetic valve 42, the outlet of the absorber 12 is provided. A pipe 74 is branched from a pipe 71 connecting the refrigerant heat recovery heat exchanger 6 to the side, and the pipe 74 is connected to the evaporator 13 and the solenoid valve 43 is provided in the pipe 74. is there.

  During the cooling operation of the vapor compression refrigerator X, the electromagnetic valve 41 and the electromagnetic valve 42 are opened and the electromagnetic valve 43 is closed, while during the heating operation of the vapor compression refrigerator X, The operation modes of the solenoid valves 41 to 43 are set so that the solenoid valve 41 and the solenoid valve 42 are closed and the solenoid valve 43 is opened.

  Therefore, in the refrigeration apparatus Z of this embodiment, the following functions and effects can be obtained during the cooling operation and the heating operation of the vapor compression refrigerator X, respectively.

  During the cooling operation of the vapor compression refrigeration machine X, the absorption refrigeration machine Y is in an operating state. In this state, both the solenoid valve 41 and the solenoid valve 42 are opened, and the solenoid valve 43 is closed. Therefore, the circuit configuration is the circuit configuration during the cooling operation of the refrigeration apparatus according to the first invention. The same effects can be obtained. Therefore, for the operational effects during the cooling operation, the corresponding description of the first embodiment is used, and the description here is omitted.

  On the other hand, during the heating operation of the vapor compression refrigerator X, both the solenoid valve 41 and the solenoid valve 42 are closed, and the solenoid valve 43 is opened. In the absorption refrigerator Y, the operation of the condenser 14 and the supercooling heat exchanger 15 is stopped, only the solution pump 17 is operated, and the exhaust heat is supplied to the generator 11. Will continue.

  Therefore, when the vapor compression refrigerator X is heated in this state, both the solenoid valve 41 and the solenoid valve 42 are closed and the solenoid valve 43 is opened. The solution on the outlet side flows into the refrigerant heat recovery heat exchanger 6 and the evaporator 13, respectively. As a result, in both the refrigerant heat recovery heat exchanger 6 and the evaporator 13, heat exchange is performed between the solution on the absorption refrigerator Y side and the refrigerant on the vapor compression refrigerator X side, The evaporating temperature of the refrigerant is further increased, and accordingly, the amount of heat released due to the condensation of the refrigerant in the use side heat exchanger 3 is increased, thereby improving the heating performance of the vapor compression refrigerator X. Become. The increase in the evaporation temperature during the heating operation also has an effect of reducing the driving power of the compressor 1 and contributes to the improvement of the heating performance.

  In the refrigeration apparatus Z of this embodiment, the solution spraying device 18 and the refrigerant liquid spraying device 19 provided in the evaporator 13 of the absorption refrigerator Y are configured separately. With this configuration, the heat of the evaporator 13 is maintained while maintaining an appropriate state of refrigerant distribution to the heat exchanger 13a of the evaporator 13 in the inherently provided sprayer 19 for distributing the refrigerant. The structure or installation position of the solution spraying device 18 can be set so that the solution spraying to the exchanger 13a is performed appropriately.

V: Fifth Embodiment FIG. 5 shows a circuit configuration of a refrigeration apparatus Z according to a fifth embodiment of the present invention. This refrigeration apparatus Z is positioned as a modification of the refrigeration apparatus Z according to the fourth embodiment. That is, in the refrigeration apparatus Z according to the fourth embodiment, the refrigeration apparatus Z is constituted by one vapor compression refrigeration machine X and one absorption refrigeration machine Y. In the refrigeration apparatus Z according to the embodiment, this is constituted by two vapor compression refrigeration machines X and one absorption refrigeration machine Y, and the increase in the number of installed vapor compression refrigeration machines X is supported. Each of the vapor compression refrigeration machines X is provided with the refrigerant heat recovery heat exchanger 6, and the exhaust heat of the refrigerant of each of the vapor compression refrigeration machines X is absorbed in the corresponding heat recovery heat exchanger 6. It collect | recovers to the solution side of the refrigerator Y, and is comprised so that this recovered waste heat may be supplied to the said generator 11 of the said absorption-type refrigerator Y.

  According to such a configuration, since the amount of recovered heat from the refrigerant side of the vapor compression refrigeration machine X to the generator 11 side of the absorption refrigeration machine Y increases, for example, even when there is little exhaust heat from the engine or the like, The absorption refrigeration machine Y can be appropriately operated by effectively using the recovered refrigerant exhaust heat, and as a result, each of the vapor compression refrigeration machines by heat exchange in the evaporator 13 of the absorption refrigeration machine Y. The refrigerant of X can be sufficiently subcooled, and as a result, the performance improvement effect of the entire refrigeration apparatus Z can be obtained.

  In the refrigeration apparatus Z of this embodiment, the solution spraying device 18 provided in the evaporator 13 of the absorption refrigeration machine Y is integrally configured so that it can be shared as a sprayer for spraying refrigerant liquid. ing. With this configuration, the evaporator 13 can be reduced in size and cost by reducing the arrangement space of the spreader.

  Moreover, there is no restriction | limiting in the juxtaposition number of the said vapor compression type refrigerator X, What is necessary is just to set the juxtaposition number as needed.

1 ・ ・ Compressor 2 ・ ・ Four-way switching valve 3 ・ ・ Use side heat exchanger 4 ・ ・ Expansion valve 5 ・ ・ Accumulator 6 ・ ・ Heat recovery heat exchanger 7 ・ ・ Heat source side heat exchanger 11 ・ ・ Generation ··· Absorber 13 ·· Evaporator 14 ·· Condenser 15 ·· Supercooling heat exchanger 16 ·· Solution heat exchanger 17 ·· Solution pump 18 to 19 ·· Spreader 41 to 43 ·· Solenoid valve 51-57 ・ ・ Pipe 61-67 ・ ・ Pipe 71-74 ・ ・ Pipe X ・ ・ Vapor compression refrigerator Y ・ ・ Absorption refrigerator Z ・ ・ Refrigerator

Claims (8)

A refrigerating apparatus comprising a vapor compression refrigerator (X) and an absorption refrigerator (Y) driven by exhaust heat from an engine or the like,
Pipe line (67) from the refrigerant of the vapor compression refrigerator (X) and the outlet of the absorber (12) of the absorption refrigerator (Y) to the solution heat exchanger (16) via the solution pump (17) A heat recovery heat exchanger (6) for exchanging heat with the solution branched from
During the cooling operation of the vapor compression refrigeration machine (X), the solution after the heat recovery of the refrigerant of the vapor compression refrigeration machine (X) is performed by the heat recovery heat exchanger (6) is used as the absorption refrigeration machine. The refrigerant of the vapor compression refrigeration machine (X) after flowing into the generator (11) of (Y) and having the heat recovery history in the heat recovery heat exchanger (6) is supplied to the absorption refrigeration machine ( Y) undercooling in the evaporator (13),
During the heating operation of the vapor compression refrigeration machine (X), the four-way switching valve (2) is switched, and the refrigerant of the vapor compression refrigeration machine (X) is caused to flow in the opposite direction to that during the cooling operation. The refrigerant compressed in (1) is heat-exchanged in the use side heat exchanger (3), and is piped from the heat exchanger (13a) in the evaporator (13) of the absorption refrigeration machine (Y). After passing through the path (54), the refrigerant heat recovery heat exchanger (6) returns to the compressor (1), and the heat recovery heat exchanger (6) communicates with the solution on the absorption refrigerator (Y) side. A refrigeration apparatus configured to increase the temperature of the refrigerant of the vapor compression refrigerator (X) by heat exchange. In claim 1,
The solution flowing into the absorber (12) of the absorption refrigeration machine (Y) is supercooled by the supercooling heat exchanger (15) of the absorption refrigeration machine (Y), and then into the absorber (12). A refrigeration system characterized by adopting an indirect cooling system for inflow. In claim 1 or 2,
The pipe (64) on the outlet side of the absorber (12) of the absorption refrigerator (Y) reaches the supercooling heat exchanger (15) for supercooling the solution flowing into the absorber (12). Branching to a line (67) leading to the generator (11) via a solution heat exchanger (16) for exchanging heat between the line (65) and the solution from the generator (11); Further, the pipe (67) is branched into a pipe (71) leading to the heat recovery heat exchanger (6),
At least one of the pipe (65) and the pipe (67) is provided with solenoid valves (41) and (42), and the solenoid valves (41) and (42) are connected to the vapor compression refrigerator ( X) A refrigeration apparatus configured to open during cooling operation and close during heating operation. In claim 1 or 2,
The pipe (64) on the outlet side of the absorber (12) of the absorption refrigerator (Y) reaches the supercooling heat exchanger (15) for supercooling the solution flowing into the absorber (12). Branching to a line (67) leading to the generator (11) via a solution heat exchanger (16) for exchanging heat between the line (65) and the solution from the generator (11); Further, the pipe (67) is branched into a pipe (71) leading to the heat recovery heat exchanger (6),
An electromagnetic valve (41) is provided in the pipe (65), and a pipe (62) flowing into the evaporator (13) from the pipe (71) and the generator (11) is connected to the solenoid valve (43). ) By a conduit (73) with
During the cooling operation of the vapor compression refrigerator (X), the solenoid valve (41) is opened, the solenoid valve (43) is closed,
A refrigeration apparatus configured to close the solenoid valve (41) and open the solenoid valve (43) during heating operation of the vapor compression refrigerator (X). In claim 1 or 2,
The pipe (64) on the outlet side of the absorber (12) of the absorption refrigerator (Y) reaches the supercooling heat exchanger (15) for supercooling the solution flowing into the absorber (12). Branching to a line (67) leading to the generator (11) via a solution heat exchanger (16) for exchanging heat between the line (65) and the solution from the generator (11); Further, the pipe (67) is branched into a pipe (71) leading to the heat recovery heat exchanger (6),
An electromagnetic valve (41) is provided in the pipe line (65), and an electromagnetic valve (42) is provided in the pipe line (67).
The pipe (71) and the evaporator (13) are connected by a pipe (74) having a solenoid valve (43),
During the cooling operation of the vapor compression refrigerator (X), both the solenoid valve (41) and the solenoid valve (42) are opened, the solenoid valve (43) is closed,
In the heating operation of the vapor compression refrigerator (X), the solenoid valve (41) and the solenoid valve (42) are both closed, and the solenoid valve (43) is opened. Refrigeration equipment. In claim 4 or 5,
The refrigeration apparatus characterized in that the sprayer for spraying the solution and the sprayer for spraying the refrigerant liquid in the evaporator (13) have a separate structure or an integrated structure that can be shared. In claim 1, 2, 3, 4, 5 or 6,
In the evaporator (13), the refrigerant liquid of the absorption refrigeration machine (Y) is transient and flows through the heat transfer surface of the evaporator (13), and the non-evaporated refrigerant liquid is on the absorber (12) side. The refrigeration apparatus is configured to move to and be absorbed by the solution on the absorber (12) side. In claim 1, 2, 3, 4, 5, 6 or 7,
A plurality of the vapor compression refrigeration units (X) are installed, and the heat recovery heat exchanger (6) is provided in each of the vapor compression refrigeration units (X), and the respective vapor compression refrigeration units (X) The exhaust heat of each refrigerant is recovered, and the exhaust heat recovered by each heat recovery heat exchanger (6) is supplied to the generator (11) of one absorption refrigerator (Y). A refrigeration apparatus characterized by that.

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