JP2008275288A - Evaporation type air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cool or heat a plurality of cooling and heating portions separately in an evaporation type air conditioner which cools the plurality of cooling and heating portions by an evaporative liquid cooled by boiling and evaporation in one of a first container and a second container, and heats the portions by the evaporative liquid heated by evaporation and condensation in the other container. <P>SOLUTION: In this evaporation type air conditioner, each of cooling and heating heat exchangers 4, 5 and 6 disposed at each of the plurality of cooling and heating portions 1, 2 and 3 is provided with a switching means for switching a first state for supplying the evaporative liquid cooled by boiling and evaporation and a second state for supplying the evaporative liquid heated by vapor condensation. The switching means is switched to the first state and the second state, and in addition, switched to a third state for stopping the supply of the evaporative liquids from both containers to the respective cooling and heating heat exchangers. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an evaporative air conditioner that uses a liquid having evaporability such as water, that is, an evaporative liquid, to perform air-conditioning at a plurality of air-conditioning locations using atmospheric air. is there.

Patent Document 1 as a prior art includes:
“At least a first container and a second container held at a reduced pressure, an air conditioner heat exchanger installed at an air conditioner, and an endothermic heat exchanger for exchanging heat with atmospheric air, A first circulation pipe for circulating an evaporative liquid such as water in the first container between the heat exchanger for cooling and heating; and an evaporating liquid such as water in the second container for the heat for releasing heat. A steam compressor capable of forward and reverse rotation is provided in a second circulation line that circulates between the exchanger and a steam duct that connects the first container and the second container. "
The configuration is described.

  In this prior art configuration, when the vapor compressor is rotated in the forward direction to perform vapor compression from the first container to the second container, the evaporating liquid in the first container is boiled and evaporated. After being cooled to a predetermined temperature in step 1, after being sent to a heat exchanger for air conditioning, the vapor is generated by boiling evaporation in the first container while returning to the first container and evaporating again. After being compressed by the vapor compressor, the vapor reaches the second container and is condensed by the evaporative liquid in the second container. Since the steam is repeatedly returned to the second container and condensed after being cooled by heat exchange with the atmospheric air, it is possible to perform a cooling operation in which the cooling / heating portion is cooled.

Further, when the vapor compressor is rotated in the opposite direction so as to perform vapor compression in the direction from the second container to the first container, the evaporable liquid in the second container is heated to a predetermined temperature by boiling evaporation. After being cooled to the heat exchanger for releasing heat absorption, where the heat is absorbed and heated by heat exchange with the atmospheric air, and then returned to the second container again and repeatedly boiled and evaporated. Vapor generated by boiling evaporation in the second container is compressed by the vapor compressor and then reaches the first container, where it is condensed by the evaporating liquid in the first container. Since the evaporating liquid whose temperature has been increased is sent to the heat exchanger for air conditioning, it returns to the first container and condenses the vapor repeatedly, so that it is possible to perform a heating operation of heating the air conditioning location. .
Japanese Patent Application Laid-Open No. 2006-97989

  As described above, the prior art apparatus is provided with a heat exchanger for air conditioning at the air conditioning location, and during the cooling operation, the steam compressor is rotated forward in the heat exchanger for air conditioning. By supplying the evaporative liquid cooled in the container, the air-conditioning part is cooled, while in the heating operation, the steam compressor is reversely rotated to the air-conditioning heat exchanger in the first container. It is the structure which heats the said air-conditioning location by supplying the evaporating liquid whose temperature became high.

  However, rotating the steam compressor forward and backward as in the prior art not only greatly reduces the durability of the steam compressor, but also evaporative liquid supplied to the air conditioner heat exchanger at each air conditioning location. When the steam compressor is rotationally controlled so that the temperature of the steam compressor is kept substantially constant with respect to changes in atmospheric temperature and heat load, there is a problem that this rotational control is difficult.

  In addition, in the prior art air conditioner, the first container, the second container, the heat exchanger for releasing heat and the steam compressor constituting the air conditioner are arranged for each of the plurality of cooling / heating locations. Therefore, there is a problem that not only the apparatus as a whole becomes very large, but also the price is greatly increased, and the running cost required for air conditioning is also greatly increased.

  It is a technical object of the present invention to provide an evaporative air conditioner that can reliably achieve cooling and heating of a plurality of cooling and heating points without causing the above-described problems. It is.

In order to achieve this technical problem, claim 1
“At least the first and second containers kept under reduced pressure, a plurality of cooling / heating heat exchangers installed in each of the plurality of cooling / heating locations, and heat exchange for heat release and absorption that exchanges heat with the atmosphere. A first circulation pipe for supplying the evaporative liquid in the first container to each of the air conditioner heat exchangers in parallel and circulating the air from the air conditioner heat exchangers back to the first container. A second circulation line that circulates the evaporative liquid in the second container to supply to the heat-dissipating heat-absorbing heat exchanger and returns from the heat-dissipating heat-absorbing heat exchanger to the second container; A steam duct connecting between the container and the second container, and a steam compressor configured to perform steam compression in the direction of the second container from the first container to the steam duct,
The evaporative liquid in the first container circulates between the cooling / heating heat exchangers in each of the air-conditioning locations, while the evaporative liquid in the second container circulates between the heat-dissipating heat exchangers. Cooling operation,
The evaporative liquid in the first container circulates between the heat exchanger for heat release and absorption, while the evaporative liquid in the second container circulates between the air conditioner and the heat exchanger for cooling / heating. For heating operation,
It was configured to be switchable. "
It is characterized by that.

Claim 2
"In the description of claim 1, each of the heat exchangers for cooling and heating at each of the plurality of cooling and heating locations,
During the cooling operation, supply of the evaporative liquid from the first container to a part of the air conditioner heat exchangers among the air conditioner heat exchangers is stopped and the part of the air conditioner heat exchangers is stopped. A first state in which the evaporative liquid in the second container is supplied and returned to the second container from a part of the heat exchanger for cooling and heating,
During the heating operation, supply of the evaporative liquid from the second container to some of the cooling / heating heat exchangers among the heating / cooling heat exchangers is stopped, and the partial cooling / heating heat exchangers are stopped. To the second state in which the evaporative liquid in the first container is supplied and returned to the first container from a part of the heat exchanger for cooling and heating,
Switching means adapted to switch is provided. "
It is characterized by that.

Furthermore, claim 3
“In the description of claim 2, each of the switching means includes:
In addition to being configured to switch between the first state and the second state,
It is possible to switch to the third state in which the supply of the evaporable liquid from both containers to each of the air conditioner heat exchangers is stopped.
It is a configuration. "
It is characterized by that.

In addition, claim 4
“In the claim 2 or 3, the switching means is:
A bypass supply line for supplying a part of the evaporable liquid in the second container to the inlet of each of the air conditioner heat exchangers;
A bypass return pipe connecting an outlet of each of the air conditioner heat exchangers to the second container or the second circulation pipe;
An inlet-side on-off valve provided at a portion of the first circulation pipe and the bypass supply pipe connected to the inlet of each of the air conditioner heat exchangers;
An outlet-side on-off valve provided at a portion of the first circulation line and the bypass return line that is connected to the outlet of each heat exchanger for cooling and heating,
It is configured. "
It is characterized by that.

  The vaporized liquid in the first container is cooled by boiling and evaporating, and the vapor generated by boiling and evaporating in the first container is compressed by a vapor compressor and then By reaching the second container and being condensed by the evaporating liquid in the second container, the temperature of the evaporating liquid in the second container is increased.

  Therefore, the evaporating liquid in the first container is circulated between the heat exchangers for cooling and heating, while the evaporating liquid in the second container is circulated between the heat exchangers for releasing and absorbing heat. By making the operation, the evaporative liquid cooled by boiling evaporation in the first container is sent all at once to the heat exchanger for cooling and heating at each of the plurality of cooling and heating locations, and then returns to the first container again to evaporate to boiling. On the other hand, the evaporative liquid whose temperature has been increased by vapor condensation in the second container is sent to a heat exchanger for heat release and is cooled (heat radiation) by heat exchange with atmospheric air. Since the process of returning to the second container and condensing the steam is repeated, the plurality of cooling / heating locations can be simultaneously cooled.

  Further, the evaporating liquid in the first container is circulated between the heat-dissipating heat exchanger and the evaporating liquid in the second container is circulated between the air-conditioning heat exchangers. By making the operation, the evaporative liquid cooled by boiling evaporation in the first container is sent to the heat exchanger for heat release and heat absorption and warmed by heat exchange with the atmospheric air (heat absorption), and then the first liquid again. While returning to the container and repeatedly evaporating to the boil, the evaporating liquid whose temperature has increased due to vapor condensation in the second container is sent to the air conditioner heat exchangers in each of the plurality of air conditioners at the same time. Since the process of returning to the first container and condensing the steam is repeated, the plurality of cooling / heating locations can be heated at the same time.

  As described above, according to the present invention, it is possible to simultaneously cool and heat a plurality of air-conditioning locations in the first container, the second container, the heat-dissipating heat exchanger, the steam compressor, and the like, which are common to them. As a result, not only the overall device can be made very small, but also a significant reduction in price can be achieved, and in addition, a significant reduction in running cost required for air conditioning can be achieved.

  In addition, the steam compressor can be cooled or heated without forward and reverse rotation as in the prior art, in other words, the steam compressor can be rotated in one direction. The temperature of the evaporating liquid supplied to the cooling / heating heat exchanger at each heating / cooling location can be kept substantially constant with respect to changes in atmospheric temperature and heat load, etc. It is possible to reliably and accurately control the rotation of the steam compressor.

  In this case, according to the configuration described in claim 2, during the simultaneous cooling described above, by switching only the heat exchanger for air conditioning at any air conditioning location among the plurality of air conditioning locations, to the first state. A part of the evaporating liquid whose temperature has increased in the second container due to vapor condensation is supplied only to the air conditioner heat exchanger in the arbitrary air conditioner, and then the second container is supplied from the air conditioner heat exchanger. Therefore, only the arbitrary cooling / heating point can be heated.

  Further, according to the configuration described in claim 2, during the simultaneous heating described above, by switching only the heat exchanger for cooling / heating in any cooling / heating location among the plurality of cooling / heating locations to the second state, After a part of the evaporating liquid whose temperature has been lowered by boiling evaporation in the second container is supplied to the air conditioner heat exchanger at the arbitrary air conditioner location, the bypass return pipe is routed from the air conditioner heat exchanger. Therefore, only the arbitrary cooling / heating point can be cooled.

  That is, according to claim 2, the plurality of cooling / heating locations can be individually cooled and heated.

  In particular, according to the configuration described in claim 3, in the state where each of the plurality of cooling / heating locations is cooled or heated, only the heat exchanger for cooling / heating at any of the plurality of cooling / heating locations is By switching to the third state in which no evaporating liquid is allowed to flow through the heat exchanger for cooling and heating, it is possible to stop cooling or heating only the arbitrary cooling and heating location, so that the plurality of cooling and heating locations can be separately cooled. Alternatively, it is possible to freely set the heating or to stop the cooling and heating.

  And according to the structure described in Claim 4, there exists an advantage which can be reliably achieved with a simple structure that the several air-conditioning location can be made into cooling or heating separately, or switching to air-conditioning stop.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a first embodiment.

  In FIG. 1, reference numeral 1 denotes a first cooling / heating location, reference numeral 2 denotes a second cooling / heating location, and reference 3 denotes a third cooling / heating location. 3 is provided with indirect heat exchange type air conditioners 4, 5, 6, and zone pumps are provided at the inlets 4 a, 5 a, 6 a of the air conditioners 4, 5, 6. 7, 8, and 9 are connected.

  In FIG. 1, reference numeral 10 denotes a first container having a sealed structure, and reference numeral 11 denotes a second container having the same sealed structure, and either or both of these containers 10 and 11 are shown. Is connected to a vacuum generator such as a vacuum pump 12 for reducing the pressure in both the first container 10 and the second container 11 below atmospheric pressure.

  A first circulation pump 13 is provided between the first container 10 and the suction side of the zone pumps 7, 8, 9 at the inlets 4 a, 5 a, 6 a of the heat exchangers 4, 5, 6. A first circulation return pipe is connected between the outlets 4b, 5b, 6b of the heat exchangers 4, 5, 6 and the first container 10 while being connected in parallel via the circulation supply pipe 14. By connecting in parallel via the passage 15, evaporating liquid such as water placed in the first container 10 is supplied to the heat exchangers 4, 5, 5 through the first circulation supply pipe 14. 6 in parallel to the inlets 4a, 5a and 6a, the outlets 4b, 5b and 6b of the heat exchangers 4 and 5 and 6 for the cooling and heating are again connected to the first through the first circulation return line 15. It is configured to circulate such that it returns to the upper part in one container 10 so as to be ejected from the nozzle 16. There.

  In the first circulation supply pipe 14, inlet-side first on-off valves 17, 18, 19 are provided at the connection portions of the zone pumps 7, 8, 9 to the suction side. Outlet-side first on-off valves 20, 21, and 22 are provided at the connection portions of the circulation return pipe 15 to the outlets 4 b, 5 b, 6 b in the heat exchangers 4, 5, 6.

  On the other hand, evaporative liquid such as water put in the second container 11 is pumped out by a second circulation supply line 24 provided with a circulation pump 23 and sent to a heat-release heat exchanger 25 configured in a sealed type. After that, the circulation is performed such that the nozzle 27 returns to the upper part in the second container 11 again through the second circulation return pipe 26.

  In this case, the heat exchanger 25 for releasing and absorbing heat includes a ventilation tower 25a installed outdoors, and a heat transfer tube 25b having a sealed structure provided therein, and the evaporating liquid in the second container 11 is the While being configured to circulate between the inside of the heat transfer tube 25b, in addition to spraying water circulating in the pump 25c outside the heat transfer tube 25b in the ventilation tower 25a, It is configured to forcibly vent the atmospheric air.

  The middle part of the second circulation supply pipe 24 or the second container 11 and the suction side of the zone pumps 7, 8, 9 at the inlets 4 a, 5 a, 6 a of the heat exchangers 4, 5, 6. Are connected in parallel via a bypass supply line 28, while the middle part of the second circulation return line 26 or the second container 11 and the heat exchangers 4, 5 and 6 for cooling and heating. By connecting the outlets 4b, 5b, and 6b of the second container 11 in parallel via the bypass return pipe 29, the evaporating liquid in the second container 11 is supplied to the cooling / heating units via the bypass supply pipe 28. After supplying in parallel to the inlets 4a, 5a and 6a of the heat exchangers 4, 5 and 6, the bypass return pipes from the outlets 4b, 5b and 6b of the respective heat exchangers 4 and 5 and 6 for cooling and heating 29 to return to the second container 11 It is configured.

  In the bypass supply pipe 28, inlet-side second on-off valves 30, 31, 32 are provided at the connection portions of the zone pumps 7, 8, 9 to the suction side, and the bypass return pipe 29, outlet side second on-off valves 33, 34, and 35 are provided at connection portions to the outlets 4b, 5b, and 6b in the heat exchangers 4, 5, and 6 for cooling and heating.

  Furthermore, the upper part of the first container 10 and the upper part of the second container 11 are connected via a steam duct 36. The steam in the first container 10 is compressed in the middle of the steam duct 36. A Roots compressor 37 is provided as an example of the rotary steam compressor that is fed into the second container 11.

  A first switching valve 38 for cooling and heating is provided in the middle of the second circulation supply line 24 from the second container 11 to the heat exchanger 25 for releasing and absorbing heat, and the second circulation supply line 24 is provided. Of the first switching valve 38, one end of which is connected to the first circulation supply pipe 14 for the first container 10 or connected to the first container 10 for heating bypass supply. The other end of the pipe line 39 is connected, and a second switching valve 40 for cooling and heating is provided in the heating bypass supply pipe line 39, while the second circulation return pipe line 24 to the second container 11 is A third switching valve 41 for air conditioning is provided, and one end of the second circulation return pipe 24 on the upstream side of the third switching valve 41 is connected to the first container 10. 15 for branch connection or to the first container 10 Connect the other end of the heating bypass return line 42 comprising, in the heating bypass return line 42, provided with a fourth switch valve 43 for heating and cooling.

  In this configuration, as shown in FIG. 2, the first and second switching valves 38 and 41 for air conditioning are opened and the second switching valve 40 and the fourth switching valve 43 for cooling and heating are closed. In addition, the inlet side first on-off valves 17, 18, 19 and the outlet side first on-off valves 20, 21 for the heat exchangers 4, 5, 6 for the plurality of air conditioning locations 1, 2, 3 are used. , 22 are opened and the inlet side second on-off valves 30, 31, 32 and the outlet side second on-off valves 33, 34, 35 are closed.

  As a result, the evaporating liquid in the first container 10 evaporates and is cooled to a predetermined temperature by the boiling evaporation, and then is used for cooling and heating at the heating and cooling locations 1, 2 and 3 via the first circulation supply pipe 14. After being sent to the heat exchangers 4, 5, and 6, it is repeatedly boiled and evaporated back to the first container 10 through the first circulation return line 15, while boiling evaporation in the first container 10 is repeated. The vapor generated in is compressed by the roots compressor 37 and then reaches the second container 11 where it is condensed by the evaporating liquid. The evaporating liquid whose temperature has been increased by the vapor condensation is Then, after being sent to the heat exchanger 25 for heat release and absorption through the second circulation supply line 24 and cooled by heat exchange with the atmospheric air here (heat radiation), via the second circulation return line 26 Back to the second container 11 again to condense the vapor. Since return Ri, it is possible to cool the plurality of the respective heating and cooling portions 1, 2 and 3 simultaneously.

  During this simultaneous cooling, as shown in FIG. 3, the first air inlet side with respect to the heating / cooling heat exchanger 5 at an arbitrary cooling / heating location, for example, the second cooling / heating location 2, among the plurality of cooling / heating locations 1, 2, 3. By closing the on-off valve 18 and the outlet-side first on-off valve 21 and opening the inlet-side second on-off valve 31 and the outlet-side second on-off valve 34, the air conditioner heat exchanger 5 in the second air conditioning location 2 The supply of the evaporating liquid from the first container 10 is stopped, and the evaporating liquid in the second container 11 is supplied to the cooling / heating heat exchanger 5 in the second cooling / heating section 2 from the cooling / heating heat exchanger 5. The first container is switched back to the second container 11.

  As a result, a part of the evaporating liquid whose temperature has increased due to vapor condensation in the second container 11 is supplied to the cooling / heating heat exchanger 5 in the second cooling / heating section 2 via the bypass supply line 28. After that, since it flows so as to return to the second container 11 via the bypass return conduit 29, only the second air-conditioning location 2 is left in the other first air-conditioning location 1 and the third air-conditioning location 3 while cooling. , Can be heating.

  In addition, the inlet-side first on-off valve 18 and the outlet-side first on-off valve 21 for the air-conditioning heat exchanger 5 in the second air-conditioning location 2 are closed, and the inlet-side second on-off valve 31 and the outlet-side second on-off valve 34 are closed. By switching to the third state that is closed, it is possible to stop the cooling while only the second cooling / heating point 2 is kept in the cooling state of the other first cooling / heating points 1 and the third cooling / heating point 3.

  It goes without saying that the switching operation to the first state or the switching operation to the third state can be similarly performed for the other first air-conditioning places 1 and the third air-conditioning places 3.

  Next, as shown in FIG. 4, the first and second switching valves 38 and 41 for cooling and heating are closed and the second switching valve 40 and the fourth switching valve 43 for cooling and heating are opened. In addition, the inlet-side first on-off valves 17, 18, 19 and the outlet-side first on-off valves 20, 21, with respect to the air-conditioning heat exchangers 4, 5, 6 at the plurality of air-conditioning locations 1, 2, 3, 22 is closed and the inlet-side second on-off valves 30, 31, 32 and the outlet-side second on-off valves 34, 35, 36 are opened.

  As a result, the evaporative liquid cooled by boiling evaporation in the first container 10 is not sent to the heat exchangers 4, 5, 6 for cooling and heating, but is released and absorbed through the heating bypass supply pipe 39. Is sent to the heat exchanger 25 for heating, where it is heated by heat exchange with the atmospheric air (heat absorption), and then returns to the first container 10 again via the heating bypass return line 42 to evaporate to the boil. On the other hand, the steam generated by boiling evaporation in the first container 10 is compressed by the roots compressor 37 and then reaches the second container 11 where it is condensed by the evaporating liquid. The evaporating liquid whose temperature has increased due to the condensation is not sent to the heat-dissipating heat exchanger 25, but is supplied to the air-conditioning heat exchangers 4, 1, 2, 3 via the bypass supply pipe 28. After being sent to 5 and 6 all at once Since repeated to condense the steam back to the second container 11 again via the return path pipe 29, the plurality of the respective heating and cooling locations 1,2,3 can be simultaneously heating.

  During this simultaneous heating, as shown in FIG. 5, the first air inlet side with respect to the heating / cooling heat exchanger 5 in any one of the plurality of cooling / heating locations 1, 2, 3, for example, the second cooling / heating location 2. By opening the on-off valve 18 and the outlet-side first on-off valve 21 and closing the inlet-side second on-off valve 31 and the outlet-side second on-off valve 34, the air-conditioning heat exchanger 5 in the second air-conditioning location 2 The supply of the evaporative liquid from the second container 11 is stopped, and the evaporative liquid from the first container 10 is supplied to the cooling / heating heat exchanger 5 at the second cooling / heating location 2 to thereby supply the heating / cooling heat. It switches to the 2nd state which returns to the said 1st container 10 from the exchanger 5. FIG.

  As a result, a part of the evaporating liquid whose temperature has been lowered by boiling evaporation in the first container 10 passes through the first circulation supply line 14 in the heat exchanger 5 for cooling and heating in the second cooling / heating section 2. Since it flows so that it may return to the 1st container 10 via the 1st circulation return pipe line 15, only the said 2nd cooling / heating location 2 is connected to the other 1st cooling / heating location 1 and the 3rd cooling / heating location 3. It can be cooled with heating.

  In addition, the inlet-side first on-off valve 18 and the outlet-side first on-off valve 21 for the air-conditioning heat exchanger 5 in the second air-conditioning location 2 are closed, and the inlet-side second on-off valve 31 and the outlet-side second on-off valve 34 are closed. By switching to the third state of closing, the heating can be stopped while only the second cooling / heating point 2 is heated while the other first cooling / heating point 1 and the third cooling / heating point 3 are heated.

  It goes without saying that the switching operation to the second state or the switching operation to the third state can be performed in the same manner for the other first cooling / heating points 1 and the third cooling / heating point 3.

  As described above, according to the present embodiment, in addition to being able to simultaneously cool or heat each of the plurality of cooling and heating locations 1, 2, and 3, the plurality of cooling and heating locations 1, 2, and 3 can be individually cooled. In addition, the plurality of cooling / heating locations 1, 2, and 3 can be individually stopped for cooling and heating.

  FIG. 6 shows a second embodiment.

  In the first embodiment described above, the evaporative liquid in the second container 11 (during cooling operation) or the evaporative liquid in the first container 10 (during heating operation) is used as a heat exchanger for hermetic heat release. In the second embodiment, the second container 11 or the volatile liquid in the first container 10 and the atmosphere are exchanged heat with the atmosphere. This is a case where an open-type heat release / absorption heat exchanger 44 is used for indirect heat exchange, and the other configurations are the same as those in the first embodiment.

  That is, the open type cooling heat exchanger 44 in the second embodiment is provided with a sealed heat transfer tube 44b in a fluid chamber 44a containing an antifreeze liquid, and the inside of the heat transfer tube 44b and the second heat transfer tube 44b. In the fluid chamber 44a, the evaporating liquid in the second container 11 or the evaporating liquid in the first container 10 is circulated between the container 11 or the first container 10 and the evaporating liquid in the fluid chamber 44a. In addition, an indirect heat exchange with the antifreeze contained in the fluid chamber 44a is performed, while a packed bed 44e such as Raschig ring is provided in a forced ventilation ventilating tower 44d by the fan 44c. The antifreeze liquid accumulated at the bottom of the tower 44d is pumped out by the circulation pump 44f and supplied into the fluid chamber 44a, and then the antifreeze liquid in the fluid chamber 44a is filled in the ventilation tower 44d. By spraying the nozzle 44g on the layer 44e and circulating the packed bed 44e, the antifreeze liquid is subjected to heat exchange in direct contact with atmospheric air in the ventilation tower 44d. The antifreeze after the heat exchange and the evaporating liquid circulating between the second container 11 or the first container 10 and the heat transfer pipe 44b are indirectly heat exchanged.

  In the second embodiment, the “open-type cooling heat exchanger 44” is installed in a state where the inside of the first container 10 and the second container 11 is maintained at a pressure lower than the atmospheric pressure. Can be used. Further, by using an antifreeze liquid for heat exchange with the atmosphere, freezing occurs in the evaporating liquid in the second container 11 or the evaporating liquid in the first container 10 when the atmospheric temperature falls below the freezing point. Can be avoided reliably.

  Therefore, in the above-mentioned claim 1, the “heat release heat exchanger for exchanging heat with the atmosphere” includes the “sealed heat release heat exchanger 25” described in the first embodiment. Needless to say, the “open heat release heat exchanger 44” described in the second embodiment is naturally included.

  In each of the above embodiments, the evaporating liquid in the first container 10 and the evaporating liquid in the second container 11 are not limited to the water described in each of the above embodiments or various aqueous solutions, but may be alcohol or the like. It is needless to say that other evaporating liquids such as can be used, and antifreezing agents, anticorrosives, rust inhibitors or scale inhibitors may be appropriately added to these evaporating liquids such as water. Absent.

  Further, the steam compressor is not limited to the Roots compressor described in each of the above embodiments, and a rotary compressor such as a variable wing compressor or a screw compressor can be used.

It is a figure which shows the 1st Embodiment of this invention. It is a figure which shows the case where the several air-conditioning location is made into simultaneous cooling in the said 1st Embodiment. It is a figure which shows the case where only some air-conditioning locations are heating during simultaneous cooling in the said 1st Embodiment. It is a figure which shows the case where the several air-conditioning location is made into simultaneous heating in the said 1st Embodiment. It is a figure which shows the case where only the one part air-conditioning location is air-conditioning during simultaneous air_conditioning | cooling in the said 1st Embodiment. It is a figure which shows the heat exchanger for endothermic heat absorption in the 2nd Embodiment of this invention.

Explanation of symbols

1, 2, 3 Heating / cooling points 4, 5, 6 Heat exchanger for air conditioning 4a, 5a, 6a Entrance of heat exchanger for air conditioning 4b, 5b, 6b Exit of heat exchanger for air conditioning 10 First container 11 Second container 12 Vacuum pump 14 First circulation supply line 15 First circulation return line 25, 44 Heat exchanger for heat release and absorption 24 Second circulation supply line 26 Second circulation return line 17, 18, 19 Inlet side first on-off valve 20, 21, 22 Outlet side first on-off valve 28 Bypass supply line 29 Bypass return line 30, 31, 32 Inlet side second on-off valve 33, 34, 35 Outlet side second on-off valve 36 Steam duct 37 Roots type compression Machine (steam compressor)
39 Heating bypass supply line 42 Heating bypass return line 38 Heating first switching valve 40 Heating second switching valve 41 Heating third switching valve 43 Heating fourth switching valve

Claims (4)

At least a first container and a second container held under reduced pressure, a plurality of cooling / heating heat exchangers installed at each of a plurality of cooling / heating locations, and a heat exchanger for heat release and absorption that exchanges heat with the atmosphere And supplying the evaporative liquid in the first container to each of the air conditioner heat exchangers in parallel and circulating the air from the air conditioner heat exchangers back to the first container. A second circulation line that circulates the evaporative liquid in the second container to the heat release heat exchanger and circulates back to the second container from the heat release heat exchanger, and the first container A steam duct connecting between the first container and the second container, and a steam compressor configured to perform steam compression in the direction from the first container to the second container in the steam duct,
The evaporative liquid in the first container circulates between the cooling / heating heat exchangers in each of the air-conditioning locations, while the evaporative liquid in the second container circulates between the heat-dissipating heat exchangers. Cooling operation,
The evaporative liquid in the first container is circulated between the heat-release heat exchanger and the evaporative liquid in the second container is circulated between the air-conditioner heat exchangers in the respective air-conditioning locations. For heating operation,
Configured to be switchable,
An evaporative air conditioner characterized by that. In the description of claim 1, in each of the heat exchangers for cooling and heating at each of the plurality of cooling and heating locations,
During the cooling operation, supply of the evaporative liquid from the first container to a part of the air conditioner heat exchangers among the air conditioner heat exchangers is stopped and the part of the air conditioner heat exchangers is stopped. A first state in which the evaporative liquid in the second container is supplied and returned to the second container from a part of the heat exchanger for cooling and heating,
During the heating operation, the supply of the evaporative liquid from the second container to a part of the air conditioner heat exchangers among the air conditioner heat exchangers is stopped to the part of the air conditioner heat exchangers. To the second state in which the evaporative liquid in the first container is supplied and returned to the first container from a part of the heat exchanger for cooling and heating,
Switching means adapted to switch,
An evaporative air conditioner characterized by that. In the description of claim 2, each of the switching means includes:
In addition to being configured to switch between the first state and the second state,
It is possible to switch to the third state in which the supply of the evaporable liquid from both containers to each of the air conditioner heat exchangers is stopped.
An evaporative air conditioner characterized by having a configuration. In the claim 2 or 3, the switching means is
A bypass supply line for supplying a part of the evaporable liquid in the second container to the inlet of each of the air conditioner heat exchangers;
A bypass return pipe connecting an outlet of each of the air conditioner heat exchangers to the second container or the second circulation pipe;
An inlet-side on-off valve provided at a portion of the first circulation pipe and the bypass supply pipe connected to the inlet of each of the air conditioner heat exchangers;
An outlet-side on-off valve provided at a portion of the first circulation line and the bypass return line that is connected to the outlet of each heat exchanger for cooling and heating,
An evaporative air conditioner characterized by comprising.

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