JP5659170B2 - Air-cooled absorption refrigerator - Google Patents

Description

  The present invention relates to an air-cooled absorption refrigerator that cools an absorber and a condenser by air cooling.

  Conventionally, there is a water cooling type in which the absorber and the condenser are cooled with cooling water. In the case of a water-cooled absorption refrigerator, evaporation and condensation are performed on the outer surface of the heat transfer tube in a regenerator and condenser that have substantially the same pressure, and heat transfer tubes in an evaporator and absorber that have approximately the same pressure. It is a structure where evaporation and absorption are performed on the outer surface. For this reason, it is general that the regenerator, the condenser, the evaporator, and the absorber are integrally configured in parallel in order to ensure the refrigerant vapor flow path.

  On the other hand, an air-cooled absorption refrigerator having an air-cooled absorber and condenser has also been proposed.

  Patent Document 1 discloses an air-cooled absorption refrigeration apparatus in which an evaporator and an absorber are arranged close to each other.

JP 2004-108746 A

  In general, in the case of a water-cooled absorption refrigerator, a separate pump for circulating the cooling tower and the cooling water is required to keep the cooling water at an arbitrary temperature. Furthermore, regular maintenance is required to perform cleaning for water quality management and performance maintenance. If the water-cooled portion is air-cooled, regular maintenance related to the cooling water can be reduced.

  In the technique of Patent Document 1, since the evaporator is disposed in the air flow path for miniaturization, the evaporator becomes a shield that blocks the air flow. Although not shown in the drawings, since the refrigerant vapor pipe connecting the evaporator and the air-cooled absorber is disposed in the air flow path, the refrigerant vapor pipe also serves as a shield that blocks air. End up.

  When the air is blocked, the pressure loss in the air flow path increases, the air volume decreases, and the heat exchange efficiency of the air-cooled condenser and air-cooled absorber decreases. For this reason, in order to secure an arbitrary air volume, it is conceivable that the fan input speed must be increased to increase the electrical input. In this case, vibrations due to an increase in the number of rotations of the fan and noise such as wind noise from the fan may be a problem.

  In addition, if air cooling is used in the same way as the water cooling type, evaporators, piping, etc. will be placed in the air-side flow path, which disrupts the flow of air for air cooling and disturbs the air flow, causing noise. Become. In order to reduce the noise, it is necessary to reduce the air flow velocity, but this causes a problem that the heat exchange efficiency is lowered.

  Therefore, the present invention is to reduce noise by suppressing turbulence of airflow around the air-cooled condenser and air-cooled absorber of the air-cooled absorption refrigerator, and to improve the heat exchange efficiency in the air-cooled condenser and air-cooled absorber. Objective.

  The present invention relates to an air-cooled absorption refrigerator having a regenerator, an air-cooled condenser, an evaporator, and an air-cooled absorber, wherein the air-cooled absorber and the air-cooled condenser are disposed inside a housing provided with an air-cooling fan. However, the regenerator and the evaporator are arranged outside the casing.

  According to the present invention, since the air-cooled condenser and the air-cooled absorber, which are air-cooled heat exchangers, are arranged in different sections from the regenerator and the evaporator, the airflow around the air-cooled condenser and the air-cooled absorber is regenerated and evaporated. The noise generated by the turbulence of the airflow can be reduced without being hindered by the pipes connecting these to the air-cooled condenser and the air-cooled absorber. Moreover, since the flow velocity of an airflow can be made high by this, the heat exchange efficiency in an air cooling condenser and an air cooling absorber can be improved.

1 is an overall configuration diagram showing an air-cooled single-effect absorption refrigerator of Example 1. FIG. 1 is a schematic perspective view showing an air-cooled single-effect absorption refrigerator of Example 1. FIG. 1 is a longitudinal sectional view of a main part showing an air heat exchange unit of an air-cooled single-effect absorption refrigerator in Example 1. 1 is an overall configuration diagram showing an air-cooled single-effect absorption refrigerator of Example 2. FIG. 3 is a schematic perspective view showing an air-cooled single effect absorption refrigerator of Example 2. FIG. FIG. 3 is an overall configuration diagram showing an air-cooled single-effect absorption refrigerator according to a third embodiment. 6 is a schematic perspective view showing an air-cooled single-effect absorption refrigerator of Example 3. FIG. It is a whole block diagram which shows the air-cooling single effect absorption refrigerator of Example 4. 6 is a schematic perspective view showing an air-cooled single-effect absorption refrigerator of Example 4. FIG.

  The present invention relates to an air-cooled absorption refrigerator in which an air-cooled absorber in which an absorber is air-cooled and an air-cooled condenser in which a condenser is air-cooled are arranged in a separate section from an evaporator and a regenerator.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. In addition, the part which attached | subjected the same code | symbol in each figure has shown the part which is the same or it corresponds.

  FIG. 1 shows an example of a cycle system of an air-cooled single-effect absorption refrigerator.

  The air-cooled single-effect absorption refrigerator includes a regenerator 1, an air-cooled condenser 3, an evaporator 4, an air-cooled absorber 6, a solution heat exchanger 7, a refrigerant pump, solution pumps 9, 10, and the like. A group of components arranged between the dotted line A and the dotted line A ′ constitutes a cold / hot water unit B.

  The regenerator 1 includes a spraying device 1a (liquid spraying unit) and a heat transfer tube 1b. The regenerator 1 and the air-cooled condenser 3 are connected by a refrigerant vapor pipe 2 (high-temperature refrigerant vapor pipe). The evaporator 4 includes a spraying device 4a (liquid spraying unit) and a heat transfer tube 4b. The evaporator 4 and the air-cooled absorber 6 are connected by a refrigerant vapor pipe 5 (low temperature refrigerant vapor pipe).

  Hot water as a heating source flows through the heat transfer tube 1b, and the solution (absorbing liquid) is sprayed from the spraying device 1a toward the heat transfer tube 1b. The sprayed solution flows down the outer surface of the heat transfer tube 1b and is heated by warm water to partially evaporate, so that refrigerant vapor is generated. As a result, the solution having a low concentration is concentrated and regenerated to a solution having a high concentration.

  For example, warm water of 90 ° C. is supplied to the regenerator 1, and the hot water is cooled to 85 ° C. by heating the solution flowing on the outer surface of the heat transfer tube 1 b. On the other hand, the refrigerant vapor generated by heating and concentrating the solution flows into the air-cooled condenser 3 through the refrigerant vapor pipe 2.

  The air-cooled condenser 3 includes an upper header 3a (condenser upper header), an air-cooling heat exchanger 3b having heat transfer tubes and air-cooling fins, and a lower header 3c (condenser lower header). The refrigerant vapor from the regenerator 1 is guided to the upper header 3a through the refrigerant vapor pipe 2. In the air-cooling heat exchanger 3b, the refrigerant vapor in the heat transfer tube is cooled by the cooling air flowing outside the heat transfer tube, and is condensed and liquefied to become liquid refrigerant (water).

  The liquid refrigerant condensed and liquefied by the air-cooled condenser 3 is guided to the evaporator 4 through the solution pipe 11.

  The liquid refrigerant led to the evaporator 4 is once stored in the lower part of the evaporator 4, led to the spraying device 4a via the solution pipe 14 and the refrigerant pump 8, and sprayed on the outer surface of the heat transfer tube 4b. The liquid refrigerant flowing down the outer surface of the heat transfer tube 4b is heated by the cold water flowing inside the heat transfer tube 4b and partly evaporates, so that refrigerant vapor is generated. The refrigerant vapor flows into the air-cooled absorber 6 through the refrigerant vapor pipe 5.

  On the other hand, the cold water flowing inside the heat transfer tube 4b is cooled by latent heat of vaporization when the refrigerant vapor is generated. For example, when the pressure in the evaporator 4 is about 800 Pa and the saturation temperature of the liquid refrigerant (water) is about 4 ° C., the cold water flowing into the heat transfer tube 4b of the evaporator 4 at 12 ° C. is cooled to 7 ° C. by the latent heat of evaporation. And supplied as cold heat.

  The solution concentrated in the regenerator 1 is guided to the air-cooled absorber 6 through the solution pipe 13 and the solution pump 9.

  The air-cooled absorber 6 includes an upper header 6a (absorber upper header), an air-cooled heat exchanger 6b having heat transfer tubes and air-cooling fins, and a lower header 6c (absorber lower header). The solution from the regenerator 1 is led to the upper header 6a of the air-cooled absorber 6 and flows down while absorbing the refrigerant vapor from the evaporator 4 in the heat transfer tube of the air-cooled heat exchanger 6b. The absorption heat generated when the solution absorbs the refrigerant vapor is exchanged with the cooling air flowing on the outer surface of the air heat exchanger 6b and released to the outside air.

  The solution having a reduced concentration by absorbing the refrigerant vapor flows into the regenerator 1 from the lower header 6 c through the solution pipe 12 and the solution pump 10. The solution pipe 12 and the solution pipe 13 exchange heat in the solution heat exchanger 7. Thereby, the sensible heat of the high temperature solution heated and concentrated in the regenerator 1 can be recovered, and the relatively low temperature solution from the air-cooled absorber 6 can be preheated.

  In this embodiment, the absorbent contained in the solution (absorbing liquid) is lithium bromide, and the refrigerant is water. However, the absorbent is not necessarily limited to lithium bromide, and the present invention can also be applied using other salts such as lithium chloride.

  FIG. 2A is a schematic perspective view showing the air-cooled single-effect absorption refrigerator of the present embodiment.

  The air-cooled single-effect absorption refrigerator shown in the figure includes a cold / hot water unit B including a regenerator 1 and an evaporator 4, and an air heat exchange unit C in which the air-cooled condenser 3 and the air-cooled absorber 6 are combined into one section. Are arranged separately.

  In addition, the cold / hot water unit B includes a solution heat exchange 7, a refrigerant pump 8, and solution pumps 9 and 10 housed in a broken line portion 16 below the regenerator 1 and the evaporator 4.

  In addition, the air heat exchange unit C includes an air cooling fan 15 and includes a solution pipe 11 and a solution pipe 12 housed in a broken line portion 17 below the air cooling condenser 3 and the air cooling absorber 6. The air-cooling fan 15 is disposed at the upper part of the air-cooling heat exchange unit C, and the space provided between the air-cooling condenser 3 and the air-cooling absorber 6 is set to a negative pressure so that the air-cooling condenser 3 and the air-cooling absorber 6 are provided. Supply airflow for air cooling.

  The cold / hot water unit B and the air heat exchange unit C arranged in different compartments are connected by the refrigerant vapor pipes 2 and 5 and the solution pipes 11, 12, and 13 in FIG. Is established. In particular, the refrigerant vapor pipes 2 and 5 are connected by straight pipes as shown in FIG. 2A because the pressure loss of the refrigerant vapor causes a decrease in performance.

  1 connects the lower header 3c of the air-cooled condenser 3 and the evaporator 4, and can be disposed so as to pass through the broken line portions 16 and 17. As shown in FIG. 1, the solution pipe 12 connects the solution pump 10 and the lower header 6 c of the air-cooled absorber 6 and can be disposed so as to pass through the broken line portions 16 and 17. As shown in FIG. 1, the solution pipe 13 connects the solution pump 9 and the upper header 6 a of the air-cooled absorber 6, and it is necessary to start the solution pipe 13 from the broken line portion 16 where the solution pump 9 is disposed. However, it is raised in the compartment of the cold / hot water unit B and connected to the upper header 6 a of the air-cooled absorber 6.

  Moreover, in FIG. 2A, although the cold / hot water unit B side and the opposite side of the air heat exchange unit C are open, they are actually closed. Further, the periphery of the broken line portion 17 below the air-cooled condenser 3 and the air-cooled absorber 6 is also closed, so that almost the entire amount of cooling air flows through the air-cooled heat exchanger portion of the air heat exchange unit C.

  FIG. 2B is a longitudinal sectional view of a main part showing an air heat exchange unit of the air-cooled single effect absorption refrigerator of the first embodiment.

  In the figure, the air heat exchange unit 100 includes an air-cooled condenser 3, an air-cooled absorber 6, a housing 101, and an air-cooling fan 15. The broken line portion 17 of the air heat exchange unit C shown in FIG. 2A is omitted.

  An air-cooled condenser 3 and an air-cooled absorber 6 are accommodated in the housing 101.

  The air-cooled condenser 3 includes an upper header 3a, a lower header 3c, a heat transfer tube 131 (condenser heat transfer tube), and air-cooling fins 132. The refrigerant vapor sent from the regenerator flows in from the upper header 3a, condenses into a liquid in the process of reaching the lower header 3c through the heat transfer tube 131. The air cooling fins 132 are for expanding the heat transfer area of the outer surface of the heat transfer tube 131.

  The air-cooled absorber 6 includes an upper header 6a, a lower header 6c, a heat transfer tube 161 (absorber heat transfer tube), and air-cooling fins 162. The refrigerant vapor sent from the evaporator flows in from the upper header 6a and is absorbed by the absorbing liquid supplied from the upper header 6a in the process of reaching the lower header 6c through the heat transfer pipe 161. The air cooling fin 162 expands the heat transfer area of the outer surface of the heat transfer tube 161.

  An air cooling fan 15 is provided on the top of the housing 101. Further, grills 133 and 163 for supplying air-cooled suction air to the air-cooled condenser 3 and the air-cooled absorber 6 are provided on the side surface of the housing 101. The white arrow represents the direction of the airflow generated by the air cooling fan 15.

  With this configuration, the airflow that has passed through the grill 133 and the air-cooled condenser 3 and the airflow that has passed through the grill 163 and the air-cooled absorber 6 are sent out from the upper portion of the housing 101 by the air-cooling fan 15.

  As shown in this figure, since the regenerator 1 and the evaporator 4 are not provided inside the housing 101 and the refrigerant solution pipe 14 is provided on the side surface of the housing 101, the air flow generated by the air cooling fan 15 is obstructed. Accordingly, the flow area of the airflow is sufficiently secured, the turbulence of the airflow is reduced, and the noise due to the turbulence can be reduced.

  Further, in the air-cooled single effect absorption refrigerator of the present embodiment, since the cold / hot water unit B and the air heat exchange unit C are arranged in different sections, the air-cooled heat exchanger part of the air heat exchange unit C is used. The flow path to the air cooling fan 15 requires fewer parts and the like that block the flow of cooling air. For this reason, the heat exchange efficiency of the air cooling condenser 3 and the air cooling absorber 6 which comprises the air heat exchange unit C can be aimed at.

  FIG. 3 shows another example of a cycle system of an air-cooled single-effect absorption refrigerator. FIG. 4 shows the arrangement of the components of the air-cooled single-effect absorption refrigerator shown in FIG.

  Hereinafter, configurations and operations different from those of the first embodiment will be described.

  In this embodiment, a plurality of air heat exchange units are provided.

  First, the cycle system will be described with reference to FIG.

  In the air-cooled single effect absorption refrigerator shown in the figure, an additional air-cooled condenser 20 is connected to the air-cooled condenser 3. Further, an additional air-cooled absorber 21 is connected to the air-cooled absorber 6. The additional air-cooled condenser 20 includes an upper header 20a, an air-cooled heat exchanger 20b, and a lower header 20c. The additional air-cooled absorber 21 includes an upper header 21a, an air-cooled heat exchanger 21b, and a lower header 21c.

  Specifically, on the air-cooled condenser 3 side, a refrigerant vapor pipe 22 (high-temperature refrigerant vapor pipe) is provided on the opposite side of the upper header 3a to which the refrigerant vapor pipe 2 is connected, and the upper header 20a of the additional air-cooled condenser 20 is provided. Connected. A junction point X is provided in the middle of the solution pipe 11, and the junction point X and the lower header 20 c of the additional air-cooled condenser 20 are connected by a solution pipe 23.

  On the air-cooled absorber 6 side, a refrigerant vapor pipe 25 (low-temperature refrigerant vapor pipe) is provided on the opposite side of the upper header 6 a to which the refrigerant vapor pipe 5 is connected, and is connected to the upper header 21 a of the additional air-cooled absorber 21. A junction point Z is provided in the middle of the solution pipe 12, and the junction point Z and the lower header 21 c of the additional air-cooled absorber 21 are connected by a solution pipe 27. A branch point Y is provided in the middle of the solution pipe 13, and the branch point Y and the upper header 21 a of the additional air-cooled absorber 21 are connected by a solution pipe 24.

  Next, the operation will be described.

  On the air-cooled condenser 3 side, the refrigerant vapor from the regenerator 1 is led to the upper header 3a of the air-cooled condenser 3, and is also led to the upper header 20a of the additional air-cooled condenser 20 through the refrigerant vapor pipe 22, and each air-cooled heat is supplied. Heat exchange with cooling air is performed in the exchangers 3b and 20b to condense and liquefy, and the liquid refrigerant in the additional air-cooled condenser 20 passes through the solution pipe 23 and merges with the liquid refrigerant in the air-cooled condenser 3 at the junction X. Led to. On the air-cooled absorber 6 side, the refrigerant vapor from the evaporator 4 is guided to the upper header 6a of the air-cooled absorber 6, and is also led to the upper header 21a of the additional air-cooled absorber 21 by the refrigerant vapor pipe 25. Is absorbed by the solution from the air and flows down in the heat transfer tubes of the air-cooling heat exchangers 6b and 21b, and exchanges heat with the cooling air to release the absorbed heat to the outside air. The solution in the additional air-cooled absorber 21 passes through the solution pipe 27, joins the solution in the air-cooled absorber 6 at the junction Z, and is guided to the solution pump 10. Further, the solution from the regenerator 1 is divided into two at a branch point Y provided in the middle of the solution pipe 13, one is led to the upper header 6 a of the air-cooled absorber 6, and the other is an additional air-cooled absorber via the solution pipe 24. 21 to the upper header 21a.

  Next, it demonstrates using FIG.

  Reference numeral D shown in the figure indicates an air heat exchange unit in which the additional air-cooled condenser 20 and the additional air-cooled absorber 21 shown in FIG. 3 are combined into one section.

  The air-cooled single-effect absorption refrigerator of this embodiment is obtained by adding an additional air-cooled condenser 20 and an additional air-cooled absorber 21 to the air-cooled single-effect absorption refrigerator of Example 1 as shown in FIG. Further, the cold / hot water unit B, the air heat exchange unit C, and the air heat exchange unit D are arranged in different sections.

  As with the air heat exchange unit C, the air cooling heat exchange unit D has the air cooling fan 15 disposed on the upper part thereof, and the air cooling fan 15 is disposed between the additional air cooling condenser 20 and the additional air cooling absorber 21. Is. In the broken line portion 26, a solution pipe 23 connected to the lower header 20 c of the additional air-cooled condenser 20 and a solution pipe 27 connected to the lower header 21 c of the additional air-cooled absorber 21 are arranged. The refrigerant vapor pipe 22 and the refrigerant vapor pipe 25 are connected by a straight pipe as shown in FIG. 4 because the pressure loss of the refrigerant vapor causes a decrease in performance. The solution pipe 23 connects the lower header 20c of the additional air-cooled condenser 20 and the junction X, and can be arranged so as to pass through the broken line portions 17 and 26. The solution pipe 27 is connected to the junction Z and the lower header 21c of the additional air-cooled absorber 21, and can be arranged so as to pass through the broken line portions 17 and 26. The solution pipe 24 can be connected to the upper header 21 a of the additional air-cooled absorber 21 through the upper surface portion of the upper header 3 a of the air-cooled absorber 3, for example.

  In FIG. 4, the air heat exchange unit D side of the air heat exchange unit C and the opposite side are open, but are actually closed. In this respect, it can be said that the two casings 101 shown in FIG. 2B are arranged side by side.

  Further, the periphery of the broken line portion 26 below the additional air-cooled condenser 20 and the additional air-cooled absorber 21 is also closed, and almost all of the cooling air flowing through the air-cooled heat exchange unit D is part of the air-cooled heat exchanger of the air heat exchange unit D. It is supposed to flow through.

  By configuring and arranging as described above, the air-cooled single-effect absorption refrigerator of this embodiment has the following effects.

  When the temperature of the hot water serving as the heating source of the regenerator 1 is constant, the temperature difference between the solution side and the cooling air becomes smaller and the same exchange occurs when the temperature of the cooling air flowing through the air-cooled condenser 3 and the air-cooled absorber 6 increases. When the amount of heat is obtained, the heat transfer area is insufficient as the temperature difference is reduced. For this reason, the quantity (refrigeration capacity) of the cold heat which can be supplied from the evaporator 4 decreases. In this case, in general, it is conceivable to increase the number of air-cooled single-effect absorption chillers or to select one having a large refrigerating capacity for the shortage of refrigerating capacity.

  On the other hand, in the present embodiment, under the condition that the cooling air becomes high, the cold / hot water unit B is the same as in the first embodiment, the additional air-cooled absorber 21 is added to the air-cooled absorber 3, and the air-cooled condenser 3 is added. By adding the additional air-cooled condenser 20, the heat transfer area of the absorber and the condenser can be easily increased.

  The configuration of the present embodiment is characterized in that since the air heat exchange units C and D are packaged, it is easy to add the additional air-cooled absorber 21 and the additional air-cooled condenser 20. Thereby, the refrigerating capacity can be easily increased, and the initial cost of the air-cooled single-effect absorption refrigerator can be reduced.

  Also in the present embodiment, the number of components that block the flow of cooling air in the flow path from the air cooling heat exchanger portion of the air heat exchange unit D to the air cooling fan 15 can be reduced. For this reason, it is possible to improve the heat exchange efficiency of the additional air-cooled condenser 20 and the additional air-cooled absorber 20 constituting the air heat exchange unit D.

  FIG. 5 shows another example of a cycle system of an air-cooled single-effect absorption refrigerator. FIG. 6 shows the arrangement of the components of the air-cooled single-effect absorption refrigerator shown in FIG.

  Hereinafter, configurations and operations different from those of the first embodiment will be described.

  First, the cycle system will be described with reference to FIG.

  In the air-cooled single-effect absorption refrigerator shown in the figure, the evaporator and the air-cooled absorber are each divided into two. That is, this is a combination of the low-temperature evaporator 50 and the high-temperature evaporator 51, the air-cooled low-temperature absorber 52 and the air-cooled high-temperature absorber 53 having different internal pressures.

  In this figure, the gas phase portion of the low-temperature evaporator 50 and the upper header 52a of the air-cooled low-temperature absorber 52 are connected by a refrigerant vapor pipe 56 (first low-temperature refrigerant vapor pipe). The phase part and the upper header 53a of the air-cooled high-temperature absorber 53 are connected by a refrigerant vapor pipe 57 (second low-temperature refrigerant vapor pipe). Further, the liquid refrigerant is guided to the low temperature evaporator 50 by the refrigerant pump 8, and is sprayed from the spraying device 50a to the heat transfer tube 50b. The liquid refrigerant remaining without being evaporated is once stored in the lower part of the low-temperature evaporator 50 and then sprayed from the spraying device 51a of the high-temperature evaporator 51 to the heat transfer tube 51b using the liquid head. Cold water flows through the heat transfer tubes 50b and 51b. The cold water is cooled by evaporation of the refrigerant.

  On the other hand, the solution from the regenerator 1 is guided to the upper header 52a of the air-cooled low-temperature absorber 52 by the solution pump 9, and flows down in the heat transfer tube of the air-cooled heat exchanger 52b while absorbing the refrigerant vapor from the low-temperature evaporator 50. Then, it is temporarily stored in the lower header 52c. The solution stored in the lower header 52c is guided to the upper header 53a of the air-cooled high-temperature absorber 53 by using the liquid head, and absorbs the refrigerant vapor from the high-temperature evaporator 51 while in the heat transfer tube of the air-cooled heat exchanger 53b. Flow down. Note that the cold water of the evaporator flows in the order of the high temperature evaporator 51 and the low temperature evaporator 50.

  In the drawing, a group of components arranged between a dotted line A and a dotted line A ′ constitutes a cold / hot water unit E.

  Next, a description will be given with reference to FIG.

  The symbol E shown in the figure is a cold / hot water unit in which the regenerator 1, the low temperature evaporator 50, and the high temperature evaporator 51 of FIG. 5 are combined into one section. Moreover, the code | symbol F shown in FIG. 6 is the air heat exchange unit which put together the air-cooled condenser 3, the air-cooled low temperature absorber 52, and the air-cooled low temperature absorber 53 of FIG.

  In the cold / hot water unit E, a low-temperature evaporator 50 and a high-temperature evaporator 51 are arranged above and below. In the air heat exchange unit F, an air-cooled low-temperature absorber 52 and an air-cooled high-temperature absorber 53 are arranged above and below. The low-temperature evaporator 50 and the air-cooled low-temperature absorber 52 are connected by a refrigerant vapor pipe 56, and the high-temperature evaporator 51 and the air-cooled high-temperature absorber 53 are connected by a refrigerant vapor pipe 57. The refrigerant vapor pipes 56 and 57 are connected by a straight pipe as shown in FIG. 6 because the pressure loss of the refrigerant vapor causes a decrease in performance. Since the configuration and arrangement of other elements are the same as those in the first embodiment, a description thereof will be omitted.

  In the air-cooled single-effect absorption refrigerator of this embodiment, a differential pressure is applied to the internal pressures of the low-temperature evaporator 50 and the air-cooled low-temperature absorber 52 and the internal pressures of the high-temperature evaporator 51 and the air-cooled high-temperature absorber 53. be able to. Thereby, in the air-cooled low-temperature absorber 52 and the air-cooled high-temperature absorber 53, the temperature difference from the cooling air side can be increased, and the heat exchange efficiency can be improved.

  Further, the cold / hot water unit E and the air heat exchange unit F are arranged in different sections, and there are parts that block the flow of the cooling air in the flow path from the air cooling heat exchanger portion of the air heat exchange unit F to the air cooling fan 15. Less is enough. For this reason, the heat exchange efficiency of the air-cooled condenser 3, the air-cooled low-temperature absorber 52, and the air-cooled high-temperature absorber 53 which comprise the air heat exchange unit F can be aimed at.

  FIG. 7 shows another example of a cycle system of an air-cooled single-effect absorption refrigerator. FIG. 8 shows the arrangement of the components of the air-cooled single-effect absorption refrigerator shown in FIG.

  Hereinafter, the configuration and operation different from those of the third embodiment will be described.

  First, it demonstrates using FIG.

  In the air-cooled single-effect absorption refrigerator shown in this figure, the evaporator is divided on both sides of the regenerator, and the air-cooled condenser is also divided to equalize the cooling air pressure loss in the air-cooled heat exchanger. And arranged.

  Specifically, the low temperature evaporator 50 and the high temperature evaporator 51 are arranged separately. In order to maintain the pressure difference in the chamber, the solution pipe 62 connected to the bottom of the low-temperature evaporator 50 is provided with a U seal, and the solution pipe 62 is connected to the refrigerant tank 60. Similarly, the solution pipe 63 connected to the bottom of the high-temperature evaporator 51 is provided with a U seal, and the solution pipe 63 is connected to the refrigerant tank 60.

  The air-cooled low-temperature absorber 52 is connected to the low-temperature evaporator 50 through a refrigerant vapor pipe 56. The air-cooled high-temperature absorber 53 is connected to the high-temperature evaporator 51 through a refrigerant vapor pipe 57. The solution pipe 13 connected to the outlet of the regenerator 1 is connected to the upper header 52 a of the air-cooled low-temperature absorber 52 via the solution heat exchanger 7 and the solution pump 9. The solution pipe 64 connected to the lower header 52 c is connected to the upper header 53 a of the air-cooled high-temperature absorber 53 via the solution pump 61. The solution pipe 12 connected to the lower header 53 b is connected to the regenerator 1 via the solution pump 12 and the solution heat exchanger 7.

  Further, the refrigerant vapor pipe 2 connected to the regenerator 1 branches in the middle and is divided into refrigerant vapor pipes 58 and 59. One refrigerant vapor pipe 58 is connected to the upper header 54 a of the first air-cooled condenser 54, and the other branched refrigerant vapor pipe 59 is connected to the upper header 55 a of the second air-cooled condenser 55. . The solution pipe 65 connected to the lower header 54 c of the first air-cooled condenser 54 and the solution pipe 66 connected to the lower header 55 c of the second air-cooled condenser 55 are connected to the refrigerant tank 60.

  With these configurations, the refrigerant vapor generated in the regenerator 1 exchanges heat with the cooling air in the first air-cooled condenser 54 and the second air-cooled condenser 55, becomes liquid refrigerant, and is led to the refrigerant tank 60. The liquid refrigerant stored in the refrigerant tank 60 is guided to the low temperature evaporator 50 and the high temperature evaporator 51 by the refrigerant pump 8. The non-evaporated liquid refrigerant is guided to the refrigerant tank 60 while forming a U seal with the solution pipes 62 and 63. Moreover, the gas phase part of the refrigerant tank 60 and the low temperature evaporator 50 is connected by a communication pipe (not shown). Thereby, the liquid level can be formed in the U seals 62 and 63 based on the internal pressure of the low temperature evaporator 50, and the internal pressure difference between the low temperature evaporator 50 and the high temperature evaporator 51 can be maintained.

  On the other hand, the solution having a high concentration in the regenerator 1 is guided to the upper header 52 a of the air-cooled low-temperature absorber 52 through the solution pipe 13, the solution heat exchanger 7 and the solution pump 9. The solution flows down in the heat transfer pipe of the air-cooled heat exchanger 52b of the air-cooled low-temperature absorber 52 while absorbing the refrigerant vapor from the low-temperature evaporator 50, and is temporarily stored in the lower header 52c. To the upper header 53 of the air-cooled high-temperature absorber 53. Further, the solution flows down in the heat transfer tube of the air-cooled heat exchanger 53b of the air-cooled high-temperature absorber 53 while absorbing the refrigerant vapor from the high-temperature evaporator 51, and is temporarily stored, and the solution pipe 12, the solution pump 10, and the solution heat exchange. It is led to the regenerator 1 via the unit 7.

  In the drawing, a group of components arranged between a dotted line A and a dotted line A ′ constitutes a cold / hot water unit G.

  Next, a description will be given with reference to FIG.

  The code | symbol G shown in this figure is the cold / hot water unit which put together the regenerator 1 of FIG. 7, the low temperature evaporator 50, and the high temperature evaporator 51 into one division. In addition, the symbol H shown in FIG. 8 is the air heat in which the first air-cooled condenser 54, the second air-cooled condenser 55, the air-cooled low-temperature absorber 52, and the air-cooled low-temperature absorber 53 in FIG. It is an exchange unit.

  The cold / hot water unit G includes a broken line portion 67 in addition to the regenerator 1, the low temperature evaporator 50 and the high temperature evaporator 51. In the broken line portion 67, the solution heat exchanger 7, the solution pumps 9, 10, 61, the refrigerant tank 60, and the refrigerant pump 8 are arranged.

  In addition, the air heat exchange unit H arranges the air-cooled low-temperature absorber 52 and the first air-cooled condenser 54 so as to be adjacent in this order from the upstream side of the air flow, and the air-cooled high-temperature absorber 53 and the second air-cooled condenser 55 Are arranged so as to be adjacent in this order from the upstream side of the airflow. In this figure, a set of the air-cooled low-temperature absorber 52 and the first air-cooled condenser 54 and a set of the air-cooled high-temperature absorber 53 and the second air-cooled condenser 55 are arranged so as to sandwich the air-cooling fan 15 arranged at the upper part. It is. The broken line portion 68 includes a solution pipe 65 connected to the lower header 54 c of the first air-cooled condenser 54, a solution pipe 66 connected to the lower header 55 c of the second air-cooled condenser 55, and a lower header of the air-cooled low-temperature absorber 52. A solution pipe 64 connected to 52c and a solution pipe 12 connected to the lower header 53c of the air-cooled high-temperature absorber 53 are arranged.

  The solution pipe 13 connects the solution pump 9 and the upper header 52a of the air-cooled low-temperature absorber 52. The solution pipe 13 needs to be raised from the broken line portion 67 where the solution pump 9 is disposed. The water unit G is started up in the compartment and connected to the upper header 52 a of the air-cooled low-temperature absorber 52. Similarly, the solution pipe 64 is connected to the solution pump 61 and the upper header 53a of the air-cooled high-temperature absorber 53. The solution pipe 64 needs to be raised from the broken line portion 67 where the solution pump 61 is arranged. It is set up in the compartment of the water unit G and connected to the upper header 53 a of the air-cooled low-temperature absorber 53.

  Moreover, in FIG. 8, although the cold / hot water unit G side and the opposite side of the air heat exchange unit H are open, they are actually closed. Further, the periphery of the broken line portion 68 is also closed so that almost the entire amount of the cooling air flows through the air-cooling heat exchange portion of the air heat exchange unit H.

  As described above, in the air-cooled single effect absorption refrigerator of the present embodiment, the air-cooled absorber is divided into the air-cooled low-temperature absorber 52 and the air-cooled high-temperature absorber 53, and the air-cooled condenser is divided into the first air-cooled condenser 54. And the second air-cooled condenser 55 can be divided into the cold / hot water unit G and the air heat exchange unit H and arranged in different compartments. Therefore, the number of parts that block the flow of the cooling air in the flow path from the air-cooling heat exchange portion of the air heat exchange unit H to the air-cooling fan 15 is small. For this reason, the heat exchange efficiency of the first air-cooled condenser 54, the second air-cooled condenser 55, the air-cooled low-temperature absorber 52, and the air-cooled high-temperature absorber 53 constituting the air heat exchange unit H can be improved. In addition, since the evaporator, the air-cooled condenser, and the air-cooled absorber are arranged separately, the height can be suppressed lower than that in the third embodiment.

  In addition, although the case where only one air heat exchange unit was added was described in the above embodiment, it is not limited to this, and two or more air heat exchange units may be added. That is, three or more air heat exchange units may be provided.

  In the above embodiments, the air-cooled single effect absorption refrigerator has been described. However, the single-effect absorption refrigerator is not necessarily required, and the above configuration can be applied to the case of double effect or triple effect. Furthermore, the present invention is applicable not only to refrigerators but also to heat pumps.

  1: Regenerator, 2, 5, 22, 24, 56, 57, 58, 59: Refrigerant steam piping, 3: Air cooling condenser, 3a: Upper header, 3c: Lower header, 4: Evaporator, 6: Air cooling absorption 6a: upper header, 6c: lower header, 7: solution heat exchanger, 8: refrigerant pump, 9, 10, 61: solution pump, 11, 12, 13, 14: solution piping, 15: air cooling fan, 20 : Extended air-cooled condenser, 21: Extended air-cooled absorber, 50: Low-temperature evaporator, 51: High-temperature evaporator, 52: Air-cooled low-temperature absorber, 53: Air-cooled high-temperature absorber, 54: First air-cooled condenser, 55: First 2 air-cooled condenser, 60: refrigerant tank, 100: air heat exchange unit, 101: housing, B, E, G: cold / hot water unit, D: additional air heat exchange unit, C, F, H: air heat exchange unit.

Claims (4)

A regenerator, an air-cooled condenser, an evaporator, an air-cooled absorber, and a housing provided with an air-cooling fan, wherein the regenerator and the air-cooled condenser are connected by a high-temperature refrigerant vapor pipe, The air-cooled absorber is an air-cooled absorption type refrigerator connected by a low-temperature refrigerant vapor pipe, and the air-cooled absorber and the air-cooled condenser are arranged inside the housing and upstream of the air flow by the air-cooled fan. The regenerator and the evaporator are arranged in this order from the side , and the evaporator is composed of a low-temperature evaporator and a high-temperature evaporator having different refrigerant vapor pressures. The air cooler is composed of an air-cooled low-temperature absorber and an air-cooled high-temperature absorber having different refrigerant vapor pressures, and the low-temperature evaporator and the air-cooled low-temperature absorber are connected by a first low-temperature refrigerant vapor pipe, And the air-cooled high-temperature absorber are the second low temperature Air-cooled absorption type refrigerating machine, characterized in that connected in medium steam pipe.   2. The air-cooled absorption refrigeration according to claim 1, wherein the regenerator and the evaporator are disposed adjacent to each other, and an air flow path is provided between the air-cooled condenser and the air-cooled absorber. Machine.   The air-cooled condenser includes a condenser upper header, a condenser lower header, a plurality of condenser heat transfer tubes disposed therebetween, and a condenser air cooling fin provided on an outer surface of the condenser heat transfer tube. The high-temperature refrigerant vapor pipe connects the regenerator and the condenser upper header, and the air-cooled absorber includes an absorber upper header, an absorber lower header, and a plurality of them disposed therebetween. The absorber heat transfer tube of the present invention and an absorber air cooling fin provided on the outer surface of the absorber heat transfer tube, wherein the low-temperature refrigerant vapor pipe connects the evaporator and the absorber upper header. The air-cooled absorption refrigerator according to claim 1 or 2.   The air-cooled absorber and the air-cooled condenser are provided with a plurality of air heat exchange units arranged inside the housing, and are arranged so as to be adjacent to each other, and the air cooling of each of the adjacent air heat exchange units is provided. The condensers are connected by the high-temperature refrigerant vapor piping, and the air-cooling absorbers of the adjacent air heat exchange units are connected by the low-temperature refrigerant vapor piping. The air-cooled absorption refrigerator as described in any one of Claims.

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