JP2010243085A - Refrigeration equipment - 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,
While the solution flowing into the absorber 12 of the absorption refrigerator Y is supercooled by the supercooling heat exchanger 15 and flows into the absorber 12, the refrigerant of the vapor compression refrigerator X and the generator of the absorption refrigerator Y 11 is configured to be capable of exchanging heat with the solution in 11, and to the refrigerant circuit of the vapor compression refrigeration machine X, bypass the generator 11 and connected to the evaporator 13 of the absorption refrigeration machine Y. And an electromagnetic valve 45 is provided here. The solenoid valve 45 is opened when the vapor compression refrigerator X is in the cooling operation and when the temperature of the refrigerant at the inlet of the bypass passage 75 is lower than the set temperature, thereby excessively reducing the temperature of the refrigerant. The refrigerant exhaust heat of the vapor compression refrigeration machine X can be used as a drive heat source for the generator 11 by closing the valve when the temperature is equal to or higher than the set temperature.
[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 54 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 58 between the heat source side heat exchanger 7 and the four-way switching valve 2 of the vapor compression refrigerator X is disposed in the generator 11 is used. 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. In addition, the refrigerant that has exited the heat source side heat exchanger 7 flows into the evaporator 13 and is cooled or supercooled here, so that the refrigerant temperature decreases, so that the refrigerant inlet of the usage side heat exchanger 3 is reduced. The specific enthalpy is reduced and the cooling capacity of the use side heat exchanger 3 is improved. 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.

  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 and flows into the generator 11 from the heat exchanger 13a in the evaporator 13 of the absorption refrigeration machine Y through the pipe line 54. The operation of the condenser 14 and the supercooling heat exchanger 15 of the absorption refrigerator Y is stopped, and from the solution in the generator 11 driven by the gas engine or other exhaust heat supplied from the pipe 60, 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. In this case, in order to form a vapor compression cycle, even if the heat exchanger 11b in the generator 11 is circulated by the solution pump 17, the vapor compression refrigerator X in the generator 11 is The heat capacity for absorbing the heat of the refrigerant is much larger than the amount of heat collected by the generator 11 in the vapor compression refrigerator X during the cooling operation, and the heat exchanger 11b is disposed in the generator 11. Therefore, since the heat exchange efficiency between the solution in the generator 11 and the refrigerant on the vapor compression refrigerator X side performed via the heat exchanger 11b is low, the refrigerant depends on the solution temperature. The effect of increasing the evaporation temperature of the refrigerant by heating the refrigerant is small, and as a result, there are few places that contribute to improving the performance of the vapor compression refrigerator X. Moreover, when the heat exchanger 11b in the generator 11 is enlarged so as to obtain the effect sufficiently, it is not practical because of the high cost of the generator 11 and the heat exchanger 11b 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, In both the operation and the heating operation, particularly during the heating operation, a great performance improvement effect cannot be expected, and thus the practicality is still poor.

  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 refrigerating apparatus including the vapor compression refrigerator X and the absorption refrigerator Y driven by exhaust heat from the engine or the like, the absorber 12 of the absorption refrigerator Y described above. The solution flowing into the refrigerant is supercooled by the air-cooled supercooling heat exchanger 15 and flows into the absorber 12, and the refrigerant in the vapor compression refrigerator X and the generator 11 of the absorption refrigerator Y are contained in the absorber 11. While being configured to be able to exchange heat with the solution, the evaporator of the absorption refrigerator Y is bypassed in the refrigerant circuit of the vapor compression refrigerator X by bypassing the generator 11 of the absorption refrigerator Y. 13 is provided with a bypass path 75 and an electromagnetic valve 45 in the bypass path 75, and the vapor compression refrigeration machine X of the vapor compression refrigeration machine X at the inlet of the bypass path 75 is in the cooling operation of the vapor compression refrigeration machine X. When the refrigerant temperature is lower than the set temperature Opens the solenoid valve 45 and closes the solenoid valve 45 when the temperature of the refrigerant is equal to or higher than a set temperature, while closing the solenoid valve 45 during the heating operation of the vapor compression refrigerator X. It is characterized by doing.

  According to a second invention of the present application, in the refrigeration apparatus according to the first invention, an electromagnetic wave is connected to a pipe line 67 from the outlet of the absorber 12 of the absorption refrigerator Y to the solution heat exchanger 16 via the solution pump 17. A valve 41 is provided, and a pipe 66 on the inlet side of the absorber 12 of the absorption refrigerator Y and a pipe 62 on the refrigerant inlet side of the evaporator 13 are connected to a pipe 76 provided with a third electromagnetic valve 43. In the cooling operation of the vapor compression refrigeration machine X, the electromagnetic valve 45 is opened and closed by the set temperature of the refrigerant temperature at the inlet of the bypass passage 75 of the vapor compression refrigeration machine X. Is closed and the solenoid valve 41 is opened, while the steam compression refrigerator X is in a heating operation, the solenoid valve 43 is opened, and the solenoid valve 41 and the solenoid valve 45 are closed. It is characterized by that.

  According to a third invention of the present application, in the refrigeration apparatus according to the first invention, the pipe 67 extending from the outlet of the absorber 12 of the absorption refrigerator Y to the solution heat exchanger 16 via the solution pump 17 is electromagnetically connected. A valve 41 is provided, and a pipe 66 on the inlet side of the absorber 12 of the absorption refrigeration machine Y is connected to the evaporator 13 via a pipe 77 having a third electromagnetic valve 43, and the steam During the cooling operation of the compression refrigeration machine X, the first electromagnetic valve 41 is opened and closed by the set temperature of the refrigerant temperature at the inlet of the bypass passage 75 of the vapor compression refrigeration machine X, but the motor operated valve 43 is closed. The solenoid valve 41 is opened, while the vapor compression refrigerator X is in a heating operation, the solenoid valve 43 is opened, and the solenoid valve 41 and the solenoid valve 45 are closed. It is said.

  According to a fourth invention of the present application, in the refrigeration apparatus according to the second or third invention, an electromagnetic valve 44 is provided in a pipe 66 on the inlet side of the absorber 12 of the absorption refrigerator Y, and the vapor compression is performed. The electromagnetic valve 44 is opened during the cooling operation of the refrigerator-type refrigerator X, and the electromagnetic valve 44 is closed during the heating operation.

  According to a fifth invention of the present application, in the refrigeration apparatus according to the first, second, third, or fourth invention, an electromagnetic valve 46 is provided in the pipe line 60 on the exhaust heat inlet side of the generator 11 for cooling operation. The solenoid valve 46 is sometimes opened, while the solenoid valve 46 is closed when the solution temperature of the generator 11 is equal to or higher than a set temperature during heating operation, and the solenoid valve 46 is opened when the temperature is lower than the set temperature. It is characterized by being configured as described above.

  In the sixth invention of the present application, in the refrigeration apparatus according to the third or fourth invention, the sprayer for spraying the solution and the sprayer for spraying the refrigerant liquid in the evaporator 13 can be configured separately or shared. It is characterized by having an integrated structure.

  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 provided with a transient refrigerant liquid. The refrigerant liquid which flows through the heat transfer surface 13 and has not evaporated yet moves to the absorber 12 side and is absorbed by the solution on the absorber 12 side.

  In an 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. The exhaust heat of the refrigerant of each of the vapor compression refrigerators X is collected by the generator 11 of the 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 solution flowing into the absorber 12 of the absorption chiller Y is supercooled by the air-cooled supercooling heat exchanger 15 to flow into the absorber 12, and the vapor compression refrigeration is performed. While the heat exchange between the refrigerant of the machine X and the solution in the generator 11 of the absorption refrigeration machine Y is configured to be possible, the refrigerant circuit of the vapor compression refrigeration machine X includes the above-mentioned absorption refrigeration machine Y. A bypass path that bypasses the generator 11 and is connected to the evaporator 13 of the absorption refrigeration machine Y is provided, and an electromagnetic valve 45 is provided in the bypass path 75 so that the vapor compression refrigeration machine X can be operated during cooling operation. In addition, the refrigerant temperature at the inlet of the bypass passage 75 is set. When the temperature is lower than the temperature, the electromagnetic valve 45 is opened, and when the temperature of the refrigerant is equal to or higher than the set temperature, the electromagnetic valve 45 is closed, while the vapor compression refrigerator X is in the heating operation. The electromagnetic valve 45 is configured to be closed.

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

  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 electromagnetic valve 45 is used when the refrigerant temperature of the vapor compression refrigeration machine X is lower than a set temperature. When the valve is opened and the refrigerant temperature is equal to or higher than the set temperature, the electromagnetic valve 45 is closed.

  Therefore, when the refrigerant temperature of the vapor compression refrigerator X is lower than the set temperature at the inlet of the bypass 75, the electromagnetic valve 45 is opened, so that the compressor of the vapor compression refrigerator X is opened. The refrigerant compressed in 1 bypasses the generator 11 of the absorption refrigerator Y and flows into the evaporator 13 of the absorption refrigerator Y. In the evaporator 13, the absorption refrigerator It is cooled or supercooled by heat exchange with the solution on the Y side. For this reason, on the vapor compression refrigerator X side, the specific enthalpy of the refrigerant inlet in the use side heat exchanger 3 of the vapor compression refrigerator X is lowered by the amount of the supercooling. The cooling performance of the machine X is improved. On the absorption refrigeration machine Y side, the refrigerant on the vapor compression refrigeration machine X side is not radiated by the generator 11 of the absorption refrigeration machine Y, and an excessive temperature drop is prevented. Then, evaporation of the refrigerant from the solution in the evaporator 13 is promoted, and the absorption refrigerator Y is driven appropriately.

  On the other hand, when the temperature of the refrigerant on the vapor compression refrigerator X side is equal to or higher than the set temperature at the inlet of the bypass passage 75, the electromagnetic valve 45 is closed. Therefore, the refrigerant after being compressed by the compressor 1 of the vapor compression refrigerator X flows into the generator 11 of the absorption refrigerator Y, and the refrigerant exhaust heat of the vapor compression refrigerator X is Compared to the case where the generator 11 is used as a driving heat source for driving the generator 11 with only exhaust heat from the engine or the like, effective use of exhaust heat is promoted by the amount of refrigerant exhaust heat used.

  Furthermore, the cooling or supercooling of the refrigerant of the vapor compression refrigeration machine X is performed in the evaporator 13 of the absorption refrigeration machine Y, so that on the absorption refrigeration machine Y side, for example, the evaporator Compared with the case where cold water is circulated through the refrigerant 13, the evaporation temperature of the refrigerant of the absorption refrigeration machine Y in the evaporator 13 can be made higher. Therefore, it is possible to reduce the cost or the size of the evaporator 13 by reducing the capacity of the evaporator 13 by the increase in the evaporation temperature with respect to the refrigerant.

(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, in the refrigeration apparatus according to the present invention, as illustrated in FIG. 2, in the refrigeration apparatus according to the first invention, the solution heat from the outlet of the absorber 12 of the absorption refrigerator Y passes through the solution pump 17. A solenoid valve 41 is provided in a pipeline 67 leading to the exchanger 16, and a pipeline 66 on the inlet side of the absorber 12 of the absorption refrigerator Y and a pipeline 62 on the refrigerant inlet side of the evaporator 13 When the steam compression refrigerator X is in cooling operation, the solenoid valve 45 is connected to the pipe 76 having the three solenoid valves 43. The set temperature of the refrigerant temperature at the inlet of the bypass path 75 of the vapor compression refrigerator X Is opened and closed by closing the third solenoid valve 43 and opening the solenoid valve 41, while opening the third solenoid valve 43 during the heating operation of the vapor compression refrigerator X, and To close the solenoid valve 41 and the solenoid valve 45 Forms.

Therefore, the following functions and effects can be obtained during the cooling operation and the heating operation of the vapor compression refrigerator X, respectively.
(B-1) During the cooling operation of the vapor compression refrigeration machine X, the electromagnetic valve 45 is opened and closed by the set temperature of the refrigerant temperature at the inlet of the bypass passage 75 of the vapor compression refrigeration machine X. The valve 41 is opened, and the third electromagnetic valve 43 is closed. Accordingly, the circuit configuration is the same as the circuit configuration during the cooling operation of the refrigeration apparatus according to the first invention, and the same operational effects (see (a) above) can be obtained. The description here is omitted.
(B-2) During the heating operation of the vapor compression refrigerator X, in the absorption refrigerator Y, the operation of the condenser 14 is stopped, and only the supercooling heat exchanger 15 and the solution pump 17 are operated. Driven. Further, the supply of exhaust heat to the generator 11 is continued.

  In this state, the third electromagnetic valve 43 is opened, and the electromagnetic valve 41 and the electromagnetic valve 45 are closed.

  Therefore, the solution on the absorption refrigeration machine Y side is circulated through the evaporator 13 of the absorption refrigeration machine Y by the solution pump 17, and in the use side heat exchanger 3 on the vapor compression refrigeration machine X side. The condensed refrigerant evaporates by absorbing heat in the evaporator 13 by heat exchange with the solution on the absorption refrigerator Y side. The solution on the absorption refrigerator Y side is cooled in the evaporator 13, but is sent to the supercooling heat exchanger 15 by the solution pump, takes heat from the outside air, rises in temperature, and is sent to the evaporator 13. The The refrigerant on the vapor compression refrigerator X side evaporated by the evaporator 13 is heated by the heat exchanger 11b and the solution heated by exhaust heat from the engine or the like in the generator 11, and the vapor The refrigerant is sucked into the compressor 1 side of the compression refrigerator X, and the evaporation temperature of the vapor compression X refrigerant is increased. For this reason, for example, even when the amount of exhaust heat supplied to the generator 11 is small, the refrigerant of the vapor compression refrigerator X absorbs heat from the outside air, so that the evaporation temperature is maintained. Heating performance of the heat exchanger 11b in the generator 11 due to exhaust heat from the engine or the like contributes to improvement of the heating performance of the vapor compression refrigerator X while the heating performance of the refrigerator X remains unchanged. .

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

(C) Third invention of the present application In the third invention of the present application, in addition to the effects described in (a) above, the following specific effects are obtained. That is, in the refrigeration apparatus according to the present invention, as illustrated in FIG. 3, in the refrigeration apparatus according to the first invention, the solution heat from the outlet of the absorber 12 of the absorption chiller Y passes through the solution pump 17. The electromagnetic valve 41 is provided in the pipe line 67 leading to the exchanger 16, and the pipe line 66 on the inlet side of the absorber 12 of the absorption refrigeration machine Y is passed through the pipe line 77 provided with the electromagnetic valve 43 to evaporate the vapor. When the vapor compression refrigerator X is in a cooling operation, the solenoid valve 45 is opened and closed by the set temperature of the refrigerant temperature at the inlet of the bypass passage 75 of the vapor compression refrigerator X. While the valve 43 is closed and the solenoid valve 41 is opened, the solenoid valve 43 is opened during the heating operation of the vapor compression refrigerator X, and the solenoid valve 41 and the solenoid valve 45 are closed. It is configured.

  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 valve 45 is opened and closed by the set temperature of the refrigerant temperature at the inlet of the bypass passage 75 of the vapor compression refrigeration machine X. The solenoid valve 41 is opened, and the solenoid valve 43 is closed. Accordingly, the circuit configuration is the same as the circuit configuration during the cooling operation of the refrigeration apparatus according to the first invention, and the same operational effects (see (a) above) can be obtained. The description here is omitted.

(C-2) During heating operation During the heating operation of the vapor compression refrigerator X, in the absorption refrigerator Y, the operation of the condenser 14 is stopped, and only the solution pump 17 is operated. Further, the supply of exhaust heat to the generator 11 is continued. In this state, the solenoid valve 43 is opened, and the solenoid valve 41 and the solenoid valve 45 are closed.

  Therefore, the solution on the absorption refrigeration machine Y side is circulated through the evaporator 13 of the absorption refrigeration machine Y by the solution pump 17, and in the use side heat exchanger 3 on the vapor compression refrigeration machine X side. The condensed refrigerant evaporates by absorbing heat in the evaporator 13 by heat exchange with the solution on the absorption refrigerator Y side. The solution on the absorption refrigeration machine Y side is cooled in the evaporator 13, but is sent to the supercooling heat exchanger 15 by the solution pump 17, deprived of heat from the outside air, rises in temperature, and is sent to the evaporator 13. Is done. The refrigerant on the vapor compression refrigerator X side evaporated by the evaporator 13 is heated by the heat exchanger 11b and the solution heated by exhaust heat from the engine or the like in the generator 11, and the vapor The refrigerant is sucked into the compressor 1 side of the compression refrigerator X, and the evaporation temperature of the refrigerant of the vapor compression refrigerator X increases. For this reason, for example, even when the amount of exhaust heat supplied to the generator 11 is small, the refrigerant of the vapor compression refrigerator X absorbs heat from the outside air, so that the evaporation temperature is maintained. Heating performance of the heat exchanger 11b in the generator 11 due to exhaust heat from the engine or the like contributes to improvement of the heating performance of the vapor compression refrigerator X while the heating performance of the refrigerator X remains unchanged. .

  (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 (b) or (c), the following specific effects are acquired. That is, in the refrigeration apparatus according to the present invention, as illustrated in FIG. 3, in the refrigeration apparatus according to the second or third aspect of the invention, a pipe line 66 on the inlet side of the absorber 12 of the absorption refrigeration machine Y. The electromagnetic valve 44 is provided, and the electromagnetic valve 44 is opened during the cooling operation of the vapor compression refrigerator X, and the electromagnetic valve 44 is 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.

(D-1) During cooling operation During cooling operation of the vapor compression refrigeration machine X, the electromagnetic valve 41 and the electromagnetic valve 44 are opened, and the electromagnetic valve 45 is connected to the bypass path of the vapor compression refrigeration machine X. The solenoid valve 43 is closed although it is opened and closed by the set temperature of the refrigerant temperature at 75 inlets. Accordingly, the circuit configuration is the same as the circuit configuration during the cooling operation of the refrigeration apparatus according to the first invention, and the same operational effects (see (a) above) can be obtained. The description here is omitted.

(D-2) During heating operation During the heating operation of the vapor compression refrigerator X, in the absorption refrigerator Y, the operation of the condenser 14 is stopped, and only the solution pump 17 is operated. Further, the supply of exhaust heat to the generator 11 is continued. In this state, the solenoid valve 43 is opened, and the solenoid valve 41, the solenoid valve 44, and the solenoid valve 45 are closed.

  Therefore, the solution on the absorption refrigeration machine Y side is circulated through the evaporator 13 of the absorption refrigeration machine Y by the solution pump 17, and in the use side heat exchanger 3 on the vapor compression refrigeration machine X side. The condensed refrigerant evaporates by absorbing heat by heat exchange with the solution on the absorption refrigerator Y side flowing into the evaporator 13. The solution on the absorption refrigerator Y side is cooled in the evaporator 13, but is sent to the supercooling heat exchanger 15 by the solution pump, takes heat from the outside air, rises in temperature, and is sent to the evaporator 13. The The refrigerant on the vapor compression refrigerator X side evaporated by the evaporator 13 is heated by the heat exchanger 11b and the solution heated by exhaust heat from the engine or the like in the generator 11, and the vapor The refrigerant is sucked into the compressor 1 side of the compression refrigerator X, and the evaporation temperature of the refrigerant of the vapor compression refrigerator X increases. For this reason, for example, even when the amount of exhaust heat supplied to the generator 11 is small, the refrigerant of the vapor compression refrigerator X absorbs heat from the outside air, so that the evaporation temperature is maintained. The heating performance of the heat exchanger 11b in the generator 11 due to exhaust heat from the engine or the like contributes to the improvement of the heating performance of the vapor compression refrigeration machine X while the heating performance of the refrigerator X remains unchanged.

  Moreover, since the whole amount of the solution from the supercooling heat exchanger 15 flows into the evaporator 13 side by closing the electromagnetic valve 44, for example, the solution of the solution from the supercooling heat exchanger 15 is supplied. Compared to the case where only a part of the refrigerant flows into the evaporator 13, the heat exchange action with the refrigerant on the vapor compression refrigerator X side in the evaporator 13 is promoted, and the evaporation temperature of the refrigerant is increased. 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.

  (D-3) As a synergistic effect of the effects described in (d-1) and (d-2) above, 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.

(E) Fifth invention of the present application The fifth invention of the present application provides the following specific effects in addition to the effects described in (a), (b), (c) or (d) above. . That is, in the refrigeration apparatus according to the present invention, as illustrated in FIG. 4, in the refrigeration apparatus according to the first, second, third, or fourth invention, a pipe line on the exhaust heat inlet side of the generator 11. An electromagnetic valve 46 is provided at 60, and the electromagnetic valve 46 is opened during the cooling operation, while the electromagnetic valve 46 is closed when the solution temperature of the generator 11 is equal to or higher than the set temperature during the heating operation. At this time, the electromagnetic valve 46 is configured to open.

  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, the solenoid valve 44, and the solenoid valve 46 are opened, and the solenoid valve 45 is connected to the vapor compression refrigerator. The solenoid valve 43 is closed although it is opened and closed by the set temperature of the refrigerant temperature at the inlet of the bypass passage 75 of X. Accordingly, the circuit configuration is the same as the circuit configuration during the cooling operation of the refrigeration apparatus according to the first invention, and the same operational effects (see (a) above) can be obtained. The description here is omitted.

(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 the condenser 14 is stopped and only the solution pump 17 is operated. In this state, the solenoid valve 43 is opened, and the solenoid valve 41, the solenoid valve 44, and the solenoid valve 45 are closed. The electromagnetic valve 46 is closed when the solution temperature of the generator 11 is equal to or higher than a set temperature, and is opened when the temperature is lower than the set temperature.

  Therefore, the solution on the absorption refrigeration machine Y side is circulated through the evaporator 13 of the absorption refrigeration machine Y by the solution pump 17, and in the use side heat exchanger 3 on the vapor compression refrigeration machine X side. The condensed refrigerant evaporates by absorbing heat by heat exchange with the solution on the absorption refrigerator Y side flowing into the evaporator 13. The solution on the absorption refrigeration machine Y side is cooled in the evaporator 13, but is sent to the supercooling heat exchanger 15 by the solution pump 17, deprived of heat from the outside air, rises in temperature, and is sent to the evaporator 13. Is done. The refrigerant on the vapor compression refrigerator X side evaporated by the evaporator 13 is heated by the heat exchanger 11b and the solution heated by exhaust heat from the engine or the like in the generator 11, and the vapor The refrigerant is sucked into the compressor 1 side of the compression refrigerator X, and the evaporation temperature of the refrigerant of the vapor compression refrigerator X increases. For this reason, for example, even when the amount of exhaust heat supplied to the generator 11 is small, the refrigerant of the vapor compression refrigerator X absorbs heat from the outside air, so that the evaporation temperature is maintained. The heating performance of the heat exchanger 11b in the generator 11 due to exhaust heat from the engine or the like contributes to the improvement of the heating performance of the vapor compression refrigeration machine X while the heating performance of the refrigerator X remains unchanged.

  Further, when the solution temperature in the generator 11 is equal to or higher than the set temperature, the electromagnetic valve 46 is closed, and the supply of exhaust heat to the generator 11 is interrupted. When the temperature is lower than the set temperature, the electromagnetic valve 46 is When the valve 11 is opened and exhaust heat is supplied to the generator 11, the solution temperature in the generator 11 is always kept appropriate.

  Further, since the entire amount of the solution from the supercooling heat exchanger 15 flows into the evaporator 13 side by closing the solenoid valve 44, for example, the solution of the solution from the supercooling heat exchanger 15 is supplied. Compared to the case where only a part of the refrigerant flows into the evaporator 13, the heat exchange action with the refrigerant on the vapor compression refrigerator X side in the evaporator 13 is promoted, and the evaporation temperature of the refrigerant is increased. 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.

  (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. 3 and 4, 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, the refrigerant liquid passes through the heat transfer surface of the evaporator heat exchanger 13a while the refrigerant liquid is transient, and the non-evaporated refrigerant liquid moves to the absorber 12 side. Therefore, for example, as compared with the case where the evaporator 13 is a circulation type, the evaporator 13 and the above-mentioned installed adjacent to the evaporator 13 are absorbed in the solution on the absorber 12 side. The cost of the absorber 12 can be reduced, and as a result, the cost of a refrigeration apparatus configured by combining the vapor compression refrigerator X and the absorption refrigerator Y can be reduced.

(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 chiller 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. It is selectively switched between a pipeline 52 (during heating operation) and a pipeline 56 (during cooling operation) leading to the accumulator 5, and the use side heat exchanger 3 performs refrigerant evaporation during cooling operation, and during heating operation. 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.

  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 the concentrated solution from the generator 11 to form a dilute solution. The solution after being supercooled by the supercooling heat 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 solution flowing in 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, a configuration specific to the refrigeration apparatus Z will be described.

  In the first configuration, 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 the vapor compression refrigerator X of the vapor compression refrigerator X is connected. In the cooling operation, the refrigerant after being compressed by the compressor 1 is supercooled by the evaporator 13.

  In the second configuration, the heat exchanger 11b is arranged in the generator 11, and both ends of the heat exchanger 11b are connected to the refrigerant pipes 54 and 55 of the vapor compression refrigerator X, respectively. During the cooling operation of the vapor compression refrigerator X, the refrigerant compressed in the compressor 1 is introduced to recover the refrigerant heat to the solution side of the generator 11. Further, during the heating operation of the vapor compression refrigerator X, the refrigerant on the vapor compression refrigerator X side evaporated by heat exchange in the evaporator 13 of the absorption refrigerator Y is introduced and the evaporation temperature thereof is set. It is the structure made to raise.

  In the third configuration, the pipe 54 and the pipe 55 are connected by a bypass 75 so as to bypass the heat exchanger 11b disposed in the generator 11, and the bypass 75 is electromagnetically coupled. The valve 45 is provided. The electromagnetic valve 45 is opened / closed by the refrigerant temperature on the vapor compression refrigerator X side during the cooling operation of the vapor compression refrigerator X, while the electromagnetic valve 45 is operated during the heating operation of the vapor compression refrigerator X. 45 is closed.

  The operation of the solenoid valve 45 during the cooling operation of the vapor compression refrigerator X is performed when the temperature of the refrigerant at the inlet of the bypass passage 75 on the vapor compression refrigerator X side is lower than a set temperature. The solenoid valve 45 is opened, and the solenoid valve 45 is set to be closed when the temperature of the refrigerant is equal to or higher than a set temperature.

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. During the cooling operation, the solenoid valve 45 is opened and closed by the refrigerant temperature at the inlet of the bypass passage 75 on the vapor compression refrigerator X side.

  When the refrigerant temperature at the inlet of the bypass passage 75 is equal to or higher than the set temperature, the solenoid valve 45 is closed, so that the high temperature after being compressed in the compressor 1 of the vapor compression refrigerator X is high. The refrigerant (gas refrigerant) flows into the heat exchanger 11b of the generator 11 on the absorption refrigeration machine Y side through the four-way switching valve 2, where the solution present outside the heat exchanger 11b and By exchanging heat between them, the exhaust heat of the refrigerant is recovered to the solution side of the generator 11, and this recovered heat is part of the drive heat source of the absorption refrigeration machine Y in the generator 11. Used.

  Therefore, the amount of heat recovered toward 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 combined 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, when the refrigerant temperature at the inlet of the bypass passage 75 is lower than the set temperature, the solenoid valve 45 is opened, so that the compressor 1 of the vapor compression refrigerator X is compressed. After that, the high-temperature refrigerant passes through the four-way switching valve 2 and the electromagnetic valve 45, that is, without performing heat recovery to the generator 11 side, and the evaporator 13 of the absorption refrigerator Y as it is. Into the heat exchanger 13a side.

  When the refrigerant flows into the heat exchanger 11b on the generator 11 side (that is, when the refrigerant temperature is equal to or higher than the set temperature), the refrigerant is condensed by heat exchange in the heat exchanger 11b. After that, the evaporator 13 is further cooled or supercooled by heat exchange with the refrigerant on the absorption refrigerator Y side. The supercooled refrigerant flows into the use side heat exchanger 3 and evaporates here. In this case, since the refrigerant temperature is lowered by the supercooling in the evaporator 13, the use side heat exchanger 3 is used. The specific enthalpy of the refrigerant at the inlet is reduced, the amount of cooling heat dissipated in the use side heat exchanger 3 is increased, and the cooling performance of the vapor compression refrigerator X is improved accordingly.

  On the other hand, even when the refrigerant does not flow into the heat exchanger 11b on the generator 11 side, but flows into the evaporator 13 as it is, the refrigerant is absorbed by the absorption refrigerator Y in the evaporator 13. Although the amount of heat that is cooled or supercooled by heat exchange with the refrigerant on the side decreases, it evaporates in the use side heat exchanger 3 and the cooling function is exhibited.

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, and is provided in a bypass path 75 that bypasses the generator 11 of the absorption refrigeration machine Y in this basic circuit. In addition to the electromagnetic valve 45 and the first electromagnetic valve 41, the electromagnetic valve 41 is provided in a pipe 67 extending from the absorber 12 of the absorption refrigerator Y to the solution heat exchanger 16 through the solution pump 17. In addition, a pipe line 66 on the inlet side of the absorber 12 of the absorption refrigerator Y and a pipe line 62 on the refrigerant inlet side of the evaporator 13 are connected by a pipe 76 having an electromagnetic valve 43. The

  The operation of each of the electromagnetic valves 41, 43, 45 is set as follows. That is, the electromagnetic valve 45 is opened and closed by the refrigerant temperature at the inlet of the bypass passage 75 on the vapor compression refrigerator X side during the cooling operation of the vapor compression refrigerator X, and is closed during the heating operation. The electromagnetic valve 41 is opened during the cooling operation of the vapor compression refrigerator X, and is closed during the heating operation. The electromagnetic valve 43 is closed during the cooling operation of the vapor compression refrigerator X, and is opened during the heating operation.

  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.

II-1: During cooling operation During the cooling operation of the vapor compression refrigerator X, the solenoid valve 45 is opened and closed by the refrigerant temperature at the inlet of the bypass passage 75 on the vapor compression refrigerator X side. 41 is opened, and the solenoid valve 43 is closed. Accordingly, the circuit configuration is the same as the circuit configuration during the cooling operation of the refrigeration apparatus according to the first aspect of the invention, and the same operation and effect as this can be obtained. Omitted.

II-2: During heating operation During the heating operation of the vapor compression refrigerator X, the operation of the condenser 14 of the absorption refrigerator Y is stopped, only the solution pump 17 is operated, and the supercooler 15 is operated. And circulating the solution between the evaporator 13. In addition, since the condenser 14 is stopped, the solution also flows into the absorber 12 side, but the absorbing action in the absorber 12 is not performed. Further, the supply of exhaust heat to the generator 11 is continued.

  In this state, the solenoid valve 45 and the solenoid valve 43 are opened, and the solenoid valve 41 is closed.

  Therefore, the solution on the absorption refrigeration machine Y side is circulated through the evaporator 13 of the absorption refrigeration machine Y by the solution pump 17, and in the use side heat exchanger 3 on the vapor compression refrigeration machine X side. The condensed refrigerant evaporates by absorbing heat in the evaporator 13 by heat exchange with the solution on the absorption refrigerator Y side.

  The solution on the absorption refrigerator Y side is cooled in the evaporator 13, but is sent to the supercooling heat exchanger 15 by the solution pump, takes heat from the outside air, rises in temperature, and is sent to the evaporator 13. The The refrigerant on the vapor compression refrigeration machine X side evaporated by the evaporator 13 is heated by the heat exchanger 11b and the solution heated by exhaust heat from the engine or the like in the generator 11, and the vapor compression The refrigerant is sucked into the compressor 1 side of the refrigerator 10 and the evaporation temperature of the refrigerant of the vapor compression refrigerator X is increased. For this reason, for example, even when the amount of exhaust heat supplied to the generator 11 is small, the refrigerant of the vapor compression refrigerator X absorbs heat from the outside air, so that the evaporation temperature is maintained. Heating performance of the heat exchanger 11b in the generator 11 contributes to improvement of the heating performance of the vapor compression refrigeration machine X due to exhaust heat from the engine or the like while the heating performance of the refrigerator X remains unchanged.

  II-3: As described above, in the refrigeration apparatus Z of this embodiment, the performance improvement effect of the vapor compression refrigeration machine X can be obtained both during the cooling operation and during the heating operation, and the refrigeration apparatus is highly practical. The

  In addition, since the structure and effect other than the above are the same as that of the refrigerating apparatus Z of the said 1st Embodiment, the corresponding description is used and description here is abbreviate | omitted.

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 66 connecting the outlet side of the absorber 12 of the absorption refrigerator Y and the supercooling heat exchanger 15. In this third embodiment, the inlet line 66 of the absorber 12 of the absorption refrigeration machine Y is connected to the evaporator 13 via a line 77 provided with an electromagnetic valve 43, and In the absorption refrigerator Y, an electromagnetic valve 44 is provided in a pipe line 66 on the inlet side of the absorber 12. A solenoid valve 45 is provided in a bypass passage 75 that bypasses the generator 11, and a solenoid valve 41 is provided in a pipeline 67 that leads from the outlet side of the absorber 12 to the solution heat exchanger 16 through the solution pump 17. Is the same as in the case of the second embodiment.

  In this embodiment, during the cooling operation of the vapor compression refrigeration machine X, the electromagnetic valve 45 opens and closes depending on the refrigerant temperature at the inlet of the bypass passage 75 on the vapor compression refrigeration machine X side, and the electromagnetic valve 43 Is closed, and the solenoid valve 41 and the solenoid valve 43 are opened. Further, during the heating operation of the vapor compression refrigerator X, the solenoid valve 41, the solenoid valve 44, and the solenoid valve 45 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.

III-1: During cooling operation During cooling operation of the vapor compression refrigerator X, the electromagnetic valve 45 opens and closes depending on the refrigerant temperature at the inlet of the bypass passage 75 on the vapor compression refrigerator X side, and the electromagnetic valve 43 Is closed and the solenoid valve 41 and the solenoid valve 44 are opened. Therefore, the circuit configuration is the same as the circuit configuration during the cooling operation of the refrigeration apparatus according to the first aspect of the invention. Since the effect is obtained, the corresponding explanation is cited and the explanation here is omitted.

III-2: During heating operation During the heating operation of the vapor compression refrigerator X, in the absorption refrigerator Y, the operation of the condenser 14 is stopped and only the solution pump 17 is operated. Further, the supply of exhaust heat to the generator 11 is continued. In this state, the solenoid valve 43 is opened, and the solenoid valve 41 and the solenoid valve 45 are closed.

  Therefore, the solution on the absorption refrigeration machine Y side is circulated through the evaporator 13 of the absorption refrigeration machine Y by the solution pump 17, and in the use side heat exchanger 3 on the vapor compression refrigeration machine X side. The condensed refrigerant evaporates by absorbing heat in the evaporator 13 by heat exchange with the solution on the absorption refrigerator Y side.

  The solution on the absorption refrigeration machine Y side is cooled in the evaporator 13, but is sent to the supercooling heat exchanger 15 by the solution pump 17, deprived of heat from the outside air, rises in temperature, and is sent to the evaporator 13. Is done. The refrigerant on the vapor compression refrigerator X side evaporated by the evaporator 13 is heated by the heat exchanger 11b and the solution heated by exhaust heat from the engine or the like in the generator 11, and the vapor The refrigerant is sucked into the compressor 1 side of the compression refrigerator X, and the evaporation temperature of the refrigerant of the vapor compression refrigerator X increases. For this reason, for example, even if the amount of exhaust heat supplied to the generator 11 is small, the refrigerant of the vapor compression refrigeration machine X absorbs heat from the outside air without being affected by this, and the evaporation temperature is maintained. Therefore, the heating performance of the vapor compression refrigeration machine X is the same as that of the steam compression refrigeration machine X. It will contribute to improvement.

  Further, in this embodiment, the solution spraying device 18 in the evaporator 13 is integrally configured so that it can be shared as a refrigerant liquid spraying device. Thus, the evaporator 13 can be made compact and low in cost.

  III-3: As described above, in the refrigeration apparatus Z of this embodiment, the performance improvement effect of the vapor compression refrigeration machine X can be obtained both during the cooling operation and during the heating operation, and the refrigeration apparatus is highly practical. The

  In addition, since the structure and effect other than the above are the same as that of the refrigerating apparatus Z of the said 1st Embodiment, the corresponding description is used and description here is abbreviate | omitted.

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 based on the circuit configuration of the refrigeration apparatus Z according to the third embodiment. In this basic circuit, the refrigeration apparatus Z is connected to a pipe 60 on the exhaust heat inlet side of the generator 11 of the absorption refrigeration machine Y. An electromagnetic valve 46 is provided. The electromagnetic valve 46 is opened during the cooling operation of the vapor compression refrigerator X, and is closed when the solution temperature of the generator 11 is equal to or higher than a set temperature during the heating operation. The valve is configured to open when the temperature is lower.

  The electromagnetic valve 45 is connected to the bypass passage 75 that bypasses the generator 11, the electromagnetic valve 41 is connected to the conduit 67 that leads from the outlet side of the absorber 12 to the solution heat exchanger 16 via the solution pump 17, The electromagnetic valve 43 is connected to a pipe line 69 connecting the inlet 66 of the absorber 12 and the evaporator 13, and the electromagnetic valve 44 is further connected to the pipe line 66 of the absorption refrigerator Y on the inlet side of the absorber 12. The point provided with is the same as in the case of the third embodiment.

  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.

IV-1: During cooling operation During the cooling operation of the vapor compression refrigerator X, the solenoid valve 41 and the solenoid valve 44 are opened, and the solenoid valve 45 is connected to the bypass passage 75 on the vapor compression refrigerator X side. The solenoid valve 43 is closed by opening and closing according to the refrigerant temperature at the inlet. The electromagnetic valve 46 is closed when the solution temperature in the generator 11 is equal to or higher than the set temperature, and is opened when the temperature is lower than the set temperature. Accordingly, the circuit configuration is the same as the circuit configuration during the cooling operation of the refrigeration apparatus according to the first aspect of the invention, and the same operation and effect as this can be obtained. Omitted.

IV-2: During heating operation During the heating operation of the vapor compression refrigerator X, in the absorption refrigerator Y, the operation of the condenser 14 is stopped, and only the solution pump 17 is operated. In this state, the solenoid valve 43 is opened, and the solenoid valve 41, the solenoid valve 44, and the solenoid valve 45 are closed. The electromagnetic valve 46 is closed when the solution temperature of the generator 11 is equal to or higher than a set temperature, and is opened when the temperature is lower than the set temperature.

  Therefore, the solution on the absorption refrigeration machine Y side is circulated through the evaporator 13 of the absorption refrigeration machine Y by the solution pump 17, and in the use side heat exchanger 3 on the vapor compression refrigeration machine X side. The condensed refrigerant evaporates by absorbing heat by heat exchange with the solution on the absorption refrigerator Y side flowing into the evaporator 13.

  The solution on the absorption refrigerator Y side is cooled in the evaporator 13, but is sent to the supercooling heat exchanger 15 by the solution pump, takes heat from the outside air, rises in temperature, and is sent to the evaporator 13. The The refrigerant on the vapor compression refrigerator X side evaporated by the evaporator 13 is heated by the heat exchanger 11b and the solution heated by exhaust heat from the engine or the like in the generator 11, and the vapor The refrigerant is sucked into the compressor 1 side of the compression refrigerator X, and the evaporation temperature of the refrigerant of the vapor compression refrigerator X increases. There is no heat exchange in the generator 11. For this reason, for example, even if the amount of exhaust heat supplied to the generator 11 is small, the refrigerant of the vapor compression refrigeration machine X absorbs heat from the outside air without being affected by this, and the evaporation temperature is maintained. Therefore, the heating performance of the vapor compression refrigeration machine X is the same as that of the steam compression refrigeration machine X. It will contribute to improvement.

  Further, when the solution temperature in the generator 11 is equal to or higher than the set temperature, the electromagnetic valve 46 is closed, and the supply of exhaust heat to the generator 11 is interrupted. When the temperature is lower than the set temperature, the electromagnetic valve 46 is When the valve 11 is opened and exhaust heat is supplied to the generator 11, the solution temperature in the generator 11 is always kept appropriate.

  Further, since the entire amount of the solution from the supercooling heat exchanger 15 flows into the evaporator 13 side by closing the solenoid valve 44, for example, the solution of the solution from the supercooling heat exchanger 15 is supplied. Compared to the case where only a part of the refrigerant flows into the evaporator 13, the heat exchange action of the refrigerant on the vapor compression refrigerator X side in the evaporator 13 is promoted, and the evaporation temperature of the refrigerant is increased. As a result, the heat radiation amount 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.

  Further, in this embodiment, the sprayer 18 for spraying the solution and the sprayer 19 for spraying the refrigerant liquid in the evaporator 13 are configured separately, so that the above-mentioned sprayer for spraying the refrigerant originally provided. The structure or installation of the sprayer 18 for spraying the solution so that the solution can be sprayed properly to the coil of the evaporator 13 while maintaining the proper spraying state of the refrigerant to the coil of the evaporator 13 in 19. The position can be set.

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 modified example of the refrigeration apparatus Z according to the third embodiment. That is, in the refrigerating apparatus Z according to the third embodiment, the refrigerating apparatus Z is configured by one vapor compression refrigerating machine X and one absorption refrigerating 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. Then, two heat exchanges 11b, 11b are arranged in the generator 11 of the absorption refrigeration machine Y, and both ends of the heat exchangers 11b, 11b are respectively connected to the refrigerant of the two vapor compression refrigeration machines X. Connected to the pipes 54 and 55, the exhaust heat of the refrigerant of each vapor compression refrigerator X is recovered to the solution side of the absorption refrigerator Y via the corresponding heat exchangers 11b and 11b. Configured to supply the exhausted heat to the generator 11 of the single absorption refrigerator Y Those were.

  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.

  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 7 ·· Heat source side heat exchanger 11 ·· Generator 12 ·· Absorber 13 ·・ Evaporator 14 ・ ・ Condenser 15 ・ ・ Supercooling heat exchanger 16 ・ ・ Solution heat exchanger 17 ・ ・ Solution pump 18, 19 ・ ・ Sprayer 41 ・ ・ Solenoid valve 43 ・ ・ Solenoid valve 44 ・ ・ Solenoid valve 45 .. Solenoid valves 51 to 57 .. Pipe lines 61 to 67 .. Pipe lines 75 to 77 .. Pipe lines X .. Vapor compression type refrigerator Y .. Absorption type refrigerator Z.

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,
The solution flowing into the absorber (12) of the absorption refrigerator (Y) is supercooled by the air-cooled supercooling heat exchanger (15) and flows into the absorber (12), and the vapor compression type While configured to be able to exchange heat between the refrigerant of the refrigerator (X) and the solution in the generator (11) of the absorption refrigerator (Y),
The refrigerant circuit of the vapor compression refrigerator (X) is connected to the evaporator (13) of the absorption refrigerator (Y) by bypassing the generator (11) of the absorption refrigerator (Y). A bypass path (70) to be provided and a solenoid valve (45) provided in the bypass path (75),
During the cooling operation of the vapor compression refrigerator (X) and when the refrigerant temperature at the inlet of the bypass passage 75 is lower than the set temperature, the electromagnetic valve (45) is opened to set the refrigerant temperature. When the temperature is higher than the temperature, the solenoid valve (45) is closed,
The refrigerating apparatus characterized in that the electromagnetic valve (45) is closed during heating operation of the vapor compression refrigerator (X). In claim 1,
A solenoid valve (41) is provided in a pipe line (67) from the outlet of the absorber (12) of the absorption refrigerator (Y) to the solution heat exchanger (16) through the solution pump (17), and The absorption-type refrigerator (Y) has an electromagnetic valve (43), the pipe (66) on the inlet side of the absorber (12) and the pipe (62) on the refrigerant inlet side of the evaporator (13). Connected by conduit (76),
During the cooling operation of the vapor compression refrigeration machine (X), the electromagnetic valve (45) is opened and closed by the refrigerant temperature at the inlet of the bypass passage 75 on the vapor compression refrigeration machine X side, and the electromagnetic valve (43) is closed. While opening the solenoid valve (41),
In the heating operation of the vapor compression refrigerator (X), the solenoid valve (43) is opened, and the solenoid valve (41) and the solenoid valve (45) are closed. apparatus. In claim 1,
A solenoid valve (41) is provided in a pipe line (67) from the outlet of the absorber (12) of the absorption refrigerator (Y) to the solution heat exchanger (16) through the solution pump (17), and The pipe (66) on the inlet side of the absorber (12) of the absorption refrigerator (Y) is connected to the evaporator (13) through a pipe (77) provided with the electromagnetic valve (43). And
During the cooling operation of the vapor compression refrigeration machine (X), the electromagnetic valve (45) is opened and closed by the refrigerant temperature at the inlet of the bypass passage 75 on the vapor compression refrigeration machine X side, and the electromagnetic valve (43) is closed. While opening the solenoid valve 41,
In the heating operation of the vapor compression refrigerator (X), the solenoid valve (43) is opened, and the solenoid valve (41) and the solenoid valve (45) are closed. apparatus. In claim 2 or 3,
An electromagnetic valve (44) is provided on the inlet line (66) of the absorber (12) of the absorption refrigerator (Y),
A refrigerating apparatus configured to open the solenoid valve (44) during cooling operation of the vapor compression refrigerator (X) and close the solenoid valve (44) during heating operation. In claim 1, 2, 3 or 4,
A solenoid valve (46) is provided in the pipe (60) on the exhaust heat inlet side of the generator (11), and the solenoid valve (46) is closed when the solution temperature of the generator (11) is equal to or higher than a set temperature. The refrigeration apparatus is configured to open the solenoid valve (46) when the temperature is lower than the set temperature. In claim 3 or 4,
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 is transient and flows on the heat transfer surface of the evaporator (13), and the non-evaporated refrigerant liquid moves to the absorber (12) side and moves to the absorber (12). The refrigeration apparatus is configured to be absorbed by the solution on the side. In claim 1, 2, 3, 4, 5, 6 or 7,
A plurality of the vapor compression refrigerators (X) are installed, and the exhaust heat of the refrigerant of each vapor compression refrigerator (X) is recovered by the generator (11) of the absorption refrigerator (Y). A refrigeration apparatus characterized by comprising the above.

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