JP5483959B2 - Evaporative cooling device - Google Patents

Description

  The present invention relates to an evaporative cooling device that performs cooling by using evaporation and condensation of an evaporating liquid such as water.

As such an evaporative cooling device, there is a steam compression refrigerator (see, for example, Patent Document 1). Referring to FIG. 6 , in the steam compression refrigerator of Patent Document 1, an evaporator 60, a condenser 62 interconnected to the evaporator 60 by a connection pipe 61, and the evaporator 60 and the condenser 62. And a compressor 64 disposed in a connecting pipe (duct) 63 that connects the two to each other.

  In this steam compression refrigerator, the inside of the evaporator 60 is evaporated by evacuating the interior with the vacuum pump 65, and the compressor 64 is operated to produce cold water by lowering the temperature in the evaporator 60, A cold water pump 66 supplies the load 67 such as a radiant panel. The water vapor evaporated by the evaporator 60 is compressed by the compressor 64 and then guided to the condenser 62. In the condenser 62, it is condensed by the cooling water from the cooling tower 68 and returned to the water again. The cooling water heated by the condensation of the high-temperature steam is sent to the cooling tower 68 by the cooling water pump 69, and the heat is radiated to the outside by the cooling tower 68.

Japanese Patent Application Laid-Open No. 2006-97989

 In such a conventional example, the evaporator 60 and the condenser 62 are each constituted by individual containers, and in order to arrange the individual containers in this way, a large installation space is required and the apparatus itself is large. Along with this, there is a problem that costs increase in terms of materials and manufacturing.

 The present invention has been made in view of the above-described points. It is an object of the present invention to reduce the installation space and to reduce the size of the entire apparatus, and further to reduce the cost in terms of materials and manufacturing.

  In order to achieve the above object, the present invention is configured as follows.

Evaporative cooling apparatus according to the present invention, while being lower vacuum than the atmospheric pressure by a vacuum pump, and the evaporation chamber to boil evaporate evaporable liquid in the vacuum, vapor compression for compressing the vapor generated in this evaporation chamber and machine, with the lower vacuum than the atmospheric pressure by the vacuum pump, the evaporative cooling system and a condensing chamber for condensing the vapor compressed by the vapor compressor, at least double in the interior of a single container And having the evaporation chamber and the condensation chamber partitioned from each other by a partition, and a space is interposed between the double partitions, and one of the evaporation chamber and the condensation chamber, and the The space between the two partitions communicates with a pressure guiding tube, and the pressure in one of the chambers and the pressure in the space are the same pressure,
It is characterized by this.

  The shape of the single container is not particularly limited as long as it can be sealed, and may be, for example, a cylindrical shape that can be sealed, a rectangular tube shape, or the like.

  The partition may be double or more.

  The partition is not particularly limited as long as the inside of a single container can be partitioned into at least two chambers, an evaporation chamber and a condensation chamber.

  In the single container, the volumes of the evaporation chamber and the condensation chamber may be equally divided by the partition or may be unevenly partitioned.

  The partition may be formed of, for example, a plate material that is separate from the container, and may be integrated with the container by welding or the like. In this case, the partition may be referred to as a partition plate, or may constitute a part of the container wall and may be referred to as a partition wall.

According to the evaporative cooling device of the present invention, the evaporation chamber and the condensing chamber are formed in a single container instead of separate containers. Therefore, the evaporation chamber and the condensing chamber are configured as separate containers, and two containers are formed. Unlike the conventional apparatus that has been installed, the overall size of the apparatus can be reduced, the installation space can be reduced, and further, the material cost and thus the manufacturing cost can be reduced. In addition, since the space is interposed between the double partitions interposed between the evaporation chamber and the condensation chamber, this space is used as a space for heat insulation to effectively transfer heat from the condensation chamber to the evaporation chamber. It can block | block and can suppress the fall of thermal efficiency effectively. Furthermore, since the pressure in the space between the double partitions is the same as the pressure in either the evaporation chamber or the condensation chamber, one of the double partitions is stressed by the differential pressure. Therefore, it is possible to reduce the material cost by forming a thinner structure than the other partition. Furthermore, since the space becomes a vacuum lower than the atmospheric pressure, heat transfer from the condensation chamber to the evaporation chamber can be effectively blocked.

From the viewpoint of blocking the heat transfer, the material forming the partition, but it may also as a material of different low thermal conductivity container.

  In another embodiment of the present invention, the space interposed between the double partitions is in a reduced pressure state.

  The space may be sealed in a reduced pressure state during manufacturing, or the space may be connected to a vacuum pump or the like to be in a reduced pressure state.

  When the space between the double partitions is sealed at atmospheric pressure, after the operation of the evaporative cooling device is started, reduced evaporation on both sides of the double partition, that is, both sides of the space, is performed. The differential pressure between the chamber and the decompressed condensing chamber and the space is increased. Therefore, in this case, since the double partition needs to withstand the differential pressure, a member constituting the partition, for example, the partition plate needs to be thickened. Since the space is in a reduced pressure state, the differential pressure is reduced, and the thickness of the partition plate can be reduced.

In another preferred embodiment of the present invention, the double partition is constituted by two partition plates facing each other across the space, and the single container includes a cylindrical container body, The evaporating chamber and the condensing chamber are each formed in a semi-cylindrical shape so as to bisect the circular cross section of the container body by the two partition plates.

According to this embodiment, since the partition plates sandwich the space between them, heat transfer between the evaporation chamber and the condensation chamber can be prevented via the partition plates. Furthermore, since the inside of the cylindrical container body is divided into a semi-cylindrical shape by two partition plates and the evaporation chamber and the condensation chamber are partitioned, the apparatus can be reduced in size with a simple structure.

In still another preferred embodiment of the present invention, the condensing chamber and the space between the two partitions communicate with each other through the pressure guiding tube, and the pressure in the condensing chamber and the pressure in the space become the same pressure. Yes.

In another embodiment of the present invention, the condensing chamber is connected to the vacuum pump, and a part of the pressure guiding pipe that connects the condensing chamber and the space is connected to the condensing chamber and the vacuum pump. Consists of.

  According to the apparatus of the present invention, since the evaporation chamber and the condensation chamber are formed in the same container, the entire apparatus is reduced in size and installed as compared with the conventional apparatus in which the evaporation chamber and the condensation chamber are formed as separate containers. Space and material and manufacturing costs can be reduced. Moreover, since the space between the evaporation chamber and the condensing chamber is at least double partitioned, the heat transfer from the condensing chamber to the evaporation chamber is effectively blocked by the space, effectively preventing a decrease in thermal efficiency. can do.

FIG. 1 is a diagram showing a system configuration example of an evaporative cooling apparatus according to an embodiment of the present invention. FIG. 2 is a perspective view of the container of FIG. FIG. 3 is a side view of the container of FIG. 4 is a cross-sectional view taken along the line AA in FIG. FIG. 5 is a diagram showing a system configuration example of an evaporative cooling device according to another embodiment of the present invention. FIG. 6 is a diagram showing a system configuration example of a conventional apparatus.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a system configuration of an evaporative cooling apparatus according to an embodiment of the present invention. Referring to FIG. 1, in the evaporative cooling apparatus according to this embodiment, the interior of a single sealed container 1 is partitioned into two chambers by two partition plates 2a and 2b as will be described later. In addition, one chamber is the evaporation chamber 3, the other chamber is the condensation chamber 4, and the space 5 is interposed between the two partition plates 2 a and 2 b. This space 5 can insulate the evaporation chamber 3 and the condensation chamber 4 from each other.

  Thus, by separating the inside of the sealed single container 1 by the two partition plates 2a and 2b, the evaporation chamber 3 and the condensation chamber 4 can be arranged compactly adjacent to each other inside the single container 1. As a result, it is possible to reduce the size of the entire apparatus and to reduce manufacturing costs and material costs. In addition, the heat transfer between the two chambers 3 and 4 is effectively suppressed to prevent a decrease in thermal efficiency.

  The evaporating chamber 3 evaporates an evaporating liquid, for example, water contained in the evaporating chamber 3 at a reduced pressure lower than the atmospheric pressure, and the water accumulated in the evaporating chamber 3 is connected to the evaporating liquid outlet 6 through a pipe line. 8 is pumped out by the circulation pump 7 through the pipe 8 and supplied as a cooling source to the indirect heat exchanger 9 on the load side such as the cooling part, and then supplied to the evaporative liquid inlet 11 through the pipe line 10. The evaporating chamber 3 is configured to circulate so as to return from the nozzle 12 at the upper part thereof.

  The condensing chamber 4 draws a cooling fluid, for example, water, stored in the condensing chamber 4 from the cooling fluid outlet 13 through the pipe 16 by the circulation pump 14 and supplies it to the indirect heat exchanger 15 on the heat radiation side to the atmosphere. Cool by heat dissipation. The water cooled by the indirect heat exchanger 15 is supplied to the cooling liquid inlet 18 via the pipe line 17 and is circulated back into the condensing chamber 4 so as to be ejected from the nozzle 19 at the upper part thereof. It is configured.

  Further, the vapor outlet 20 of the evaporation chamber 3 and the vapor inlet 21 of the condensation chamber 4 are connected by a vapor duct 22, and the vapor from the evaporation chamber 3 is compressed in the middle of the vapor duct 22 to condense the chamber 4. A root type compressor is provided as the steam compressor 23 to be fed into the tank. In this roots type compressor, for example, steam can be compressed by about 10 ° C. due to a temperature difference. The steam compressor 23 is not limited to a Roots type compressor, and a blower compressor, a screw type compressor, and other compressors can be used.

  The inside of the evaporating chamber 3 and the inside of the condensing chamber 4 are kept at a reduced pressure lower than the atmospheric pressure by a vacuum pump 25 connected to the vacuum exhaust port 24 of the condensing chamber 4. It is comprised so that boiling evaporation may be performed.

  The connection port 30 at the bottom of the evaporation chamber 3 and the connection port 31 at the bottom of the condenser 4 are connected by a communication pipe 26, and a part of the water in the condensation chamber 4 is passed through the communication pipe 26. 3 is supplied.

  As described above, the evaporation chamber 3 and the condensing chamber 4 are doubly partitioned by the two partition plates 2a and 2b provided in the central portion of the container 1. The space 5 for heat insulation between the partition plates 2a and 2b is made to have the same pressure as the evaporation chamber 3 by the pressure guiding pipe 27 that connects the connection port 29 corresponding to the space 5 and the connection port 28 of the evaporation chamber 3. . As a result, the partition plate 2b on the evaporation chamber 3 side of the partition plates 2a and 2b is not subjected to stress due to the differential pressure, and a thinner partition plate can be used than the partition plate 2a on the condensation chamber 4 side. it can.

  2 is a perspective view of the container 1 of FIG. 1, FIG. 3 is a side view thereof, and FIG. 4 is a cross-sectional view taken along the line AA of FIG. Corresponding parts bear the same reference symbols.

  The container 1 is made of stainless steel, for example, and includes a cylindrical container body 1a, a front plate 1b that closes the opening at the front end, and a rear plate 1c that closes the opening at the rear end. The front plate 1b and the rear plate 1c close the space 5 between the evaporation chamber 3, the condensation chamber 4, and the partition plates 2a and 2b, respectively. The material constituting the container 1 is not limited to a metal such as stainless steel but may be a hard synthetic resin.

  As shown in FIG. 3, the container main body 1 a is disposed sideways by four mounting legs 51 so that the axis 50 thereof is horizontal.

  In the cylindrical container body 1a, two flat partition plates 2a and 2b extending in the direction of the axis 50 of the container body 1a are arranged in the diameter direction so as to bisect the circular cross section of the container body 1a. Thus, the evaporating chamber 3 and the condensing chamber 4 are partitioned and formed in a semicylindrical shape.

  A vapor outlet 20 is provided in the upper part of the main body on the evaporation chamber 3 side, while a vapor inlet 21 is provided in the upper part of the main body on the condensation chamber 4 side.

  The front plate 1b on the evaporation chamber 3 side is provided with a connection port 28 to which one end of the pressure guiding tube 27 is connected, while the upper portion of the main body corresponding to the heat insulating space 5 sandwiched between the two partition plates 2a and 2b. Is provided with a connection port 29 to which the other end of the pressure guiding tube 27 is connected.

  Evaporable liquid inlets 11 are provided at three locations on the main body side on the evaporation chamber 3 side, while cooling fluid inlets 18 are provided at three locations on the main body side on the condensation chamber 4 side.

  Further, an evaporative liquid outlet 6 is provided near the front surface of the lower part of the main body on the evaporation chamber 3 side, while a cooling liquid outlet 13 is provided near the rear surface of the lower part of the main body on the condensing chamber 4 side. Furthermore, a connection port 30 to which one end of the communication pipe 26 is connected is provided on the front side of the lower part of the main body on the evaporation chamber 3 side, while the connection pipe 26 is provided on the front side of the lower part of the main body on the condensing chamber 4 side. A connection port 31 to which the end is connected is provided. A drain pipe (not shown) is provided at the bottom of the heat insulating space 5 sandwiched between the two partition plates 2a and 2b, and in the unlikely event that refrigerant is mixed into the space 5. Can discharge the refrigerant.

  Exhaust ports 32 and 24 for vacuum exhaust are respectively provided on the evaporation chamber 3 side and the condensation chamber 4 side of the front plate 1b.

  Note that a mounting seat (not shown) for mounting the vapor compressor 23 and a motor for driving the vapor compressor 23 is provided on the upper portion of the container main body 1a. The installation space is reduced.

  The above-described system shown in FIG. 1 is configured using the container 1 having such a configuration.

  Referring to FIG. 1 again, the water that has been cooled by boiling and evaporating in the evaporation chamber 3 under reduced pressure is sent to the load side by the circulation pump 7 via the pipe 8 and indirectly. The water which has been subjected to heat exchange in the heat exchanger 9 and used for cooling or the like and whose temperature has risen on the load side returns to the evaporation chamber 3 again via the pipe line 10, and is cooled by boiling and evaporating again here. The temperature is lowered.

  On the other hand, the vapor generated by boiling evaporation in the evaporation chamber 3 is sucked and compressed by the vapor compressor 23 to reach the condensation chamber 4 and condensed by cooling in the condensation chamber 4. A part of the pressure is supplied to the evaporation chamber 3 through the communication pipe 26 due to a pressure difference.

  Further, the water condensed and liquefied by releasing heat in the condensing chamber 4 is sent to the heat radiation side by the circulation pump 14 via the pipe line 16 and cooled by heat radiation to the atmosphere by the indirect heat exchanger 15, The circulation of returning to the condensation chamber 4 through the pipe line 17 is repeated.

  In the evaporative cooling apparatus having the above configuration, the evaporation chamber 3 and the condensation chamber 4 are partitioned by dividing the inside of a single container 1 by two partition plates 2a and 2b. The overall size can be reduced to reduce the installation space and cost. In addition, since the space between the evaporation chamber 3 and the condensing chamber 4 is double partitioned with the space 5 for heat insulation interposed, heat transfer from the condensing chamber 4 to the evaporation chamber 3 is interrupted to prevent a decrease in thermal efficiency. be able to.

  As another embodiment of the present invention, the space 5 for heat insulation is not connected to the evaporation chamber 3 or the condensing chamber 4 by the pressure guiding tube to be the same pressure as the evaporation chamber 3 or the condensing chamber 4. 5 may simply be in a reduced pressure state.

  If the space 5 for heat insulation is sealed at atmospheric pressure, after the operation of the evaporative cooling device is started, the space 5 and the decompressed evaporation chamber 3 and the decompressed condensing chamber 4 on both sides thereof are separated. Since the differential pressure between them becomes large, the partition plates 2a and 2b need to be thick so that they can withstand the differential pressure. A pressure can be made small and the partition plates 2a and 2b can be made thin.

  In order to bring the space 5 for heat insulation into a reduced pressure state, the space 5 may be sealed in a reduced pressure state at the manufacturing stage, or the space 5 may be directly connected via a pipe 55 as shown in FIG. The pressure may be reduced by connecting to the vacuum pump 25. Further, the pressure may be reduced by connecting to a vacuum pump different from the vacuum pump 25.

  In the above-described embodiment, the cylindrical container 1 is disposed in the horizontal direction. However, as another embodiment, the cylindrical container 1 may be disposed in the vertical direction.

  Further, in the above-described embodiment, the circular cross section of the cylindrical container body 1a is divided into two, and the evaporation chamber 3 and the condensation chamber 4 are partitioned and formed in a semi-cylindrical shape. However, as another embodiment, FIG. The evaporation chamber and the condensation chamber may be partitioned and formed in a cylindrical shape by partitioning so as to be orthogonal to the axis 50 of the cylindrical container body 1a shown in FIG.

  In the above-described embodiment, water is used as the evaporating liquid. However, the present invention is not limited to water, and alcohol or other evaporating liquids may be used.

DESCRIPTION OF SYMBOLS 1 Container 1a Container main body 2a, 2b Partition plate 3 Evaporation chamber 4 Condensing chamber 5 Space

Claims (4)

With the lower vacuum than the atmospheric pressure by a vacuum pump, and the evaporation chamber to boil evaporate evaporable liquid at the reduced pressure, and the steam compressor for compressing the vapor generated in this evaporation chamber, than the atmospheric pressure by the vacuum pump And an evaporative cooling device comprising a condensing chamber for condensing the steam compressed by the steam compressor,
The evaporation chamber and the condensation chamber are mutually partitioned by at least a double partition inside a single container, and a space is interposed between the double partitions ,
One of the evaporation chamber and the condensing chamber communicates with the space between the partitions through a pressure guiding tube, and the pressure in the one chamber and the pressure in the space are the same pressure. evaporative cooling apparatus according to claim going on, things. The double partition is constituted by two partition plates facing each other across the space,
The single container includes a cylindrical container main body, and the evaporation chamber and the condensing chamber are divided into semi-cylindrical shapes so as to bisect the circular cross section of the container main body by the two partition plates. The evaporative cooling device according to claim 1 formed . And the space between the condensing chamber and the both partition is communicated with the guiding tube, wherein the pressure in the condensation chamber of the pressure and the space is in the same pressure, the evaporation of claim 1 or 2 Cooling device. The condensing chamber is connected to the vacuum pump, a portion of the connecting pipe for communicating the said condensing chamber space, and a pipe which connects the vacuum pump and the condenser chamber, in claim 3 The evaporative cooling device as described.

Images