JP2014122759A - Liquid cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid cooling device of a sealed type that can avoid probability of process water contamination, ensuring heat exchange efficiency equal to or higher than that of an open type device, and having a compact structure as a whole.SOLUTION: A liquid cooling device 1 includes: an oblong casing 2 in an inner lower portion of which cooled liquid is stored, and through an inner upper portion of which air passes; a rotary cylinder 6 rotatably and laterally provided in the casing 2; rotating means for axially rotating the rotary cylinder 6; and a ring fin 6 protruding from an outer circumference of the rotary cylinder 6. The ring fin 7 or/and the rotary cylinder 6 are formed so that the cooled liquid stored in the casing 2 can adhere to and spatter on the ring fin 7 or/and the rotary cylinder 6 by rotation driving of the rotating means until a lower portion of the ring fin 7 or the lower portion of the ring fin 7 and that of the rotary cylinder 6 are immersed.

Description

  The present invention relates to a liquid cooling apparatus such as a cooling tower, and more particularly to a hermetic liquid cooling apparatus.

  The cooling tower is directly contacted with air and process water (liquid to be cooled) to cool the process water, and the process water is passed through a tubular body such as a heat transfer tube, There is a hermetic cooling tower in which the process water is indirectly cooled by being brought into contact with coolant water that is a cooling liquid.

  The open-type cooling tower has no partition plate and is in direct contact, so there is no thermal resistance and it is excellent in principle. However, in actuality, it is difficult to control the relative flow conditions of both fluids, and the process water is used as a filler. It is necessary to devise such as flowing down and air flowing in the meantime.

  In addition, there is a problem of process water contamination such as contamination of air and bacteria in the process water.

  On the other hand, in the above-mentioned closed cooling tower, the problem of process water contamination is solved, but there is a problem that the efficiency is poor and the apparatus becomes large because there is a partition plate and indirect contact.

  For this reason, in order to solve the above problems, the inventor of the present application has a horizontally long casing in which cooling liquid is stored in the lower part of the interior and air passes through the upper part, and is freely rotatable in the casing. A rotating cylinder made of a high thermal conductivity material that is placed horizontally and through which the liquid to be cooled passes, rotating means that rotates the rotating cylinder around its axis, and a rotating projection that projects from the outer peripheral surface of the rotating cylinder A ring fin having a through-hole that partially contacts the cooling liquid when positioned on the lower side during rotation of the cylinder, and a fan for sucking and exhausting the air provided on the outer peripheral surface of the rotation cylinder; By rotating the rotating cylinder, the cooling liquid is brought into contact with the ring fin, and the air is passed by the fan above the cooling liquid in the housing and through the through hole of the ring fin. Steam the cooling liquid adhering to the ring fin. By the rotating cylinder body is cooled through the ring fins, it invented a liquid cooling device for cooling the process water which passes through the interior (Patent Document 1).

  According to this liquid cooling device, it is possible to provide a liquid cooling device that is a sealed type that is free from process water contamination and that has a heat exchange efficiency equal to or higher than that of an open type and that has a compact structure as a whole. did it.

JP 2011-12931 A

  However, in the liquid cooling device, since the air passage is a through hole provided mainly in the ring fin, the air flow resistance is large, and the flow rate of air passing through the housing is small. Therefore, there is a drawback that the air is easily saturated, the amount of evaporation is reduced, and the temperature drop is small.

  Further, the liquid cooling device needs to prepare a suction fan separately.

  The present invention eliminates these problems and provides a liquid cooling device having a sealed structure that is free from the risk of process water contamination, and that has a heat exchanger efficiency equivalent to or better than that of an open type, and further has a compact structure as a whole. The purpose is to provide.

  In order to achieve the above object, the liquid cooling device of the present invention has a horizontally long casing in which cooling liquid is stored in the lower part of the interior and air passes through the upper part, and is rotatable in the casing. A rotating cylinder that is provided horizontally, a rotating means that rotates the rotating cylinder around its axis, and a ring fin that protrudes from the outer peripheral surface of the rotating cylinder, the ring fin and / or the rotating cylinder The cooling liquid stored in the casing until the lower part of the ring fin, or the lower part of the ring fin and the lower part of the rotating cylinder is immersed, causes the ring fins and / or It is formed so that it can be attached to the rotating cylinder and scattered.

  According to the present invention, the heat exchanger efficiency equal to or higher than that of the open type can be obtained without providing a suction fan, and the liquid cooling apparatus having a small and compact structure as a whole can be provided.

It is a longitudinal cross-sectional view of the liquid cooling device of this invention. It is a top view of the liquid cooling device. FIG. 2 is a cross-sectional view taken along line XX in FIG. 1. It is a perspective view of the part of an external peeling blade | wing.

  The example of the form for carrying out the present invention is shown below.

  A liquid cooling apparatus according to a first embodiment of the present invention will be described with reference to FIGS.

  Reference numeral 1 denotes a liquid cooling device, 2 denotes a casing of the liquid cooling device 1, and the casing 2 includes a horizontally long cylindrical body 2c having side walls 2a and 2b at left and right ends.

  In addition, a coolant water replenishment pipe 3 which is a cooling liquid is connected to the bottom wall on the left end side of the cylindrical body 2c. Reference numeral 4 denotes an on-off valve interposed in the supply pipe 3.

  As shown in FIG. 3, a rectangular external air introduction opening 5a extending in the axial direction of the cylindrical body 2c is formed in the middle portion of the front wall 2d of the cylindrical body 2c. A rectangular air discharge opening 5b extending in the axial direction of the cylinder 2c is formed in the upper part of the rear wall 2e of the cylinder 2c.

  Reference numeral 6 denotes a rotating cylinder. The rotating cylinder 6 is made of a metal cylinder such as copper having good thermal conductivity, and passes through the casing 2 to rotate with respect to the casing 2. It is installed side by side.

  Reference numeral 7 denotes a ring fin. The ring fin 7 is made of an annular metal having a good thermal conductivity, and a large number of protrusions are provided on the outer peripheral surface of the rotary cylinder 6 at equal intervals.

  In addition, you may provide a hole or a groove | channel in the surface of this ring fin 7 so that the coolant water adhering to this ring fin 7 may be scattered easily by rotation of the said ring fin 7. FIG.

  In FIGS. 3 and 4, reference numeral 8 denotes an external stripping blade, and the external stripping blade 8 is formed from a horizontally long belt-like plate projecting horizontally at the middle portion of the inner surface of the front wall 2d of the cylindrical body 2c. Thus, a large number of notches 9 are formed at the tip, and the ring fins 7 are interposed in the notches 9.

  The notch 9 is formed so as to be close to both surfaces of the ring fin 7, and the tip of the external stripping blade 8 is formed so as to be close to the outer peripheral surface of the rotating cylinder 6. ing.

  The tip of the external stripping blade 8 and the inner edge of the notch 9 strip off the refrigerant water that is excessively entrained in the rotating cylinder 6 and the ring fin 7 to supply an appropriate amount of refrigerant water to the rotating cylinder 6. Further, the cooling effect of the rotating cylinder 6 and each ring fin 7 is prevented from being accompanied by the ring fin 7.

  Reference numeral 10a denotes an inflow chamber of process water which is a liquid to be cooled. The inflow chamber 10a is provided on the side of the left end portion of the casing 2, and the rotating cylinder 6 is inflowed at the left end portion 6a. It communicates with the chamber 10a. Reference numeral 10b denotes an outflow chamber of the process water, the outflow chamber 10b is provided on the side of the right end portion of the casing 2, and the rotating cylinder 6 communicates with the outflow chamber 10b at the right end portion 6b. doing.

  Reference numeral 11 denotes a fixed shaft. The fixed shaft 11 passes through the central portion of the rotating cylinder 6 and is fixed to the inner surface of the left wall of the inflow chamber 10a and the inner surface of the right wall of the outflow chamber 10b. Yes.

  A timing pulley 12a is fitted to the right end of the rotating cylinder 6 in the gap between the right side wall of the casing 2 and the left side wall of the outflow chamber 10b. The motor 12b passes the timing belt 12c through the timing belt 12c. The rotating cylinder 6 is rotationally driven, and the timing pulley 12a, the motor 12b, and the timing belt 12c constitute rotating means for rotating the rotating cylinder 6 around its axis.

  Reference numeral 13 denotes an internal peeling blade. The internal peeling blade 13 is formed of a horizontally long plate-like body, and protrudes from the fixed shaft 11 toward the inner wall of the rotary cylinder 6 along the fixed shaft 11. Yes.

  That is, the inner stripping blades 13 are fixed one by one above and below the fixed shaft 11, and the tip portions of the internal stripping blades 13 are formed so as to be close to the inner peripheral surface of the rotating cylinder 6. ing.

  Further, the stripping blade 13 has a horizontally long quadrilateral through hole 14, and a plurality of the through holes 14 are provided along the entire length of the stripping blade 13.

  15a is an inflow pipe for process water communicating with the inflow chamber 10a, 15b is an outflow pipe for process water communicating with the outflow chamber 10b, 16 is a degassing pipe communicating with the inflow chamber 10a, and 17 is interposed in the degassing pipe 16. The open / close valve 18 is a drain pipe connected to the outflow chamber 10 b, and 19 is an open / close valve interposed in the drain pipe 18.

  Reference numeral 20 denotes a shielding plate. The shielding plate 20 is provided at the upper rear portion in the housing 2 and is curved in a concave shape so as to prevent the scattered coolant water droplets from being discharged from the opening 5b. ing.

  Reference numeral 21a indicates a bearing provided at an intermediate portion of the left side wall 2a of the casing 2 and supports the left end portion of the rotating cylinder 6, and 21b indicates an intermediate portion of the right side wall 2b of the casing 2 and the outflow. The bearing which supports the right end part of the said rotating cylinder 6 provided in the intermediate part of the left side wall of the chamber 10b is shown.

  Next, the operation and effect of the liquid cooling apparatus 1 of the present embodiment will be described.

  The coolant water is supplied into the housing 2 from the coolant water supply pipe 3 until the lower surface of the ring fin 7 or the lower surface of the ring fin 7 and the lower portion of the rotating cylinder 6 are immersed. 2 is stored in the lower part. And the process water which flowed in from the inflow pipe 15a is once accommodated in the inflow chamber 10a, then the inside of the rotating cylinder 6 is passed through, and once stored in the outflow chamber 10b, it is discharged from the outflow pipe 15b.

  In this state, the motor 12b, which is a rotating means, is driven to rotate, and the rotating cylinder 6 is rotated about its axis via the timing belt 12c and the timing pulley 11a, so that the ring fin 7 and / or the rotation is rotated. The coolant water adhering to the cylinder 6 is scattered.

  That is, as the rotating cylinder 6 rotates, the rotating cylinder 6 and each ring fin 7 rotate while in contact with the coolant water accumulated in the lower part of the casing, and the coolant water is formed on the surface thereof. Most of the coolant water is peeled off by the external stripping blade 8 and returned to the lower part in the housing 2, and the coolant water is attached to the rotating cylinder 6 and the ring fin 7. The part becomes scattered water droplets due to centrifugal force and scatters along the ring fin 7.

  Due to the scattering of the scattered water droplets, the vicinity of the scattering surface of the rotating cylinder 6 and the ring fin 7 is in a reduced pressure state, and evaporation from a thin water film adhering to the surfaces of the rotating cylinder 6 and the ring fin 7 is induced. At the same time, evaporation is promoted by entraining the external air through the external air introduction opening 5a and taking away the vapor, thereby lowering the temperature of the rotating cylinder 6 and the ring fin 7 and conducting heat conduction. The good rotating cylinder 7 is cooled.

  Then, the process water flowing in the rotating cylinder 6 is caused by the proximity of the internal stripping blade 13 provided on the fixed shaft 11 inserted through the central portion of the rotating rotating cylinder 6 and the inner peripheral surface of the rotating cylinder 6. The boundary film is peeled off, and the process water is cooled very efficiently by the cooled rotating cylinder 6.

  In addition, air is entrained in the flow of the splashed water droplets, and an air flow from the front wall toward the rear wall is generated in the housing 2, whereby external air is introduced from the opening 5 a for introducing external air in the front wall 2 d. It is taken into the housing 2 so as to be orthogonal to the rotating cylinder 6, the splashed water droplets evaporate in the external air, the temperature of the splashed water drops decreases, and is returned to the lower part in the housing 2. The temperature of the coolant water accumulated in the lower part of the housing 2 can be lowered, and the rotating cylinder 6 in contact with the coolant water is cooled to cool the process water.

  And the air containing water vapor | steam comes to be exhausted outside from the opening part 5b for air discharge.

  That is, the surface of the rotating cylinder 6 and the vicinity of the surface of the ring fin 7 are depressurized by the centrifugal force due to the rotation, thereby promoting the evaporation of the water film on the surface, and the flow of the scattered water droplets is caused by the centrifugal force due to the rotation. When the air is entrained, external air is introduced into the housing, and air containing steam is discharged outside the housing 2 to promote cooling of the process water.

  Since the liquid cooling device of the present invention has a large overall heat transfer coefficient and mass transfer coefficient, a cooling effect that exceeds that of a gas-liquid direct contact type cooling tower can be obtained.

  Also, external air can be taken into the casing using the flow of scattered water droplets. Therefore, it is not necessary to prepare a fan, and the apparatus can be reduced in size.

  Further, since the air does not collide with the ring fin to promote evaporation, the flow resistance of the air passage is small.

  In addition, the cooling effect is large because the scattered splashed water droplets are returned to the lower part of the casing, and the scattering loss of the coolant water is small.

  Further, since it is not necessary to bring the process water into contact with the outside air, it is not necessary to deal with contamination of the process water, contamination of bacteria, reduction of the process water, and the like.

  Moreover, it is not necessary to prepare a watering pump.

  In addition, by utilizing the effect of cooling the coolant water, it can be installed in a pond in a park or factory and operated without flowing process water into a rotating cylinder as a heat transfer tube, thereby reducing the water temperature of the pond to an appropriate temperature. it can.

  The liquid cooling device of the present invention is used as a hermetic cooling tower for supplying cooling water to air conditioning equipment, mechanical equipment, and the like.

  The liquid cooling device of the present invention can be widely used as a cooling tower for air conditioning. If oil is passed through the process water, it can be used as an oil cooler. Further, it can be widely used for an apparatus for cooling a liquid near room temperature. In addition, it can be installed in parks, factory ponds, etc. on a hot summer day, and can be used to reduce the water temperature of the pond by operating without flowing fluid in the heat transfer pipe.

DESCRIPTION OF SYMBOLS 1 Liquid cooling device 2 Case 2c Tube 6 Rotating tube 7 Ring fin 8 External stripping blade 9 Notch 11 Fixed shaft 13 Stripping blade 20 Shielding plate

Claims (5)

  A horizontally long casing in which the cooling liquid is stored in the lower part of the interior and air passes through the upper part, a rotating cylinder that is rotatably disposed in the casing, and the rotating cylinder around its axis And a ring fin projecting on the outer peripheral surface of the rotary cylinder, the ring fin or / and the rotary cylinder being a lower part of the ring fin or a lower part of the ring fin and The cooling liquid stored in the casing until the lower part of the rotating cylinder is immersed is attached to the ring fins and / or the rotating cylinder by the rotational drive of the rotating means so as to be scattered. A liquid cooling device.   Air is introduced into the front wall and the rear wall of the casing on the side orthogonal to the axial direction of the rotating cylinder so that the air inside the casing passes in a direction orthogonal to the axial direction of the rotating cylinder. The liquid cooling device according to claim 1, wherein an opening for air and an opening for discharging air are provided.   3. The liquid cooling device according to claim 1, wherein a plate-like external peeling blade having notches adjacent to both sides of each ring fin is provided in the casing.   4. The liquid cooling device according to claim 3, wherein the rotating cylinder is formed in a cylindrical shape, and a tip end portion of the external peeling blade is close to an outer peripheral surface of the rotating cylinder.   The rotating cylinder is formed in a cylindrical shape, and has a fixed shaft that passes through the axial center portion of the rotating cylinder, and protrudes from the fixed shaft toward the inner wall of the rotating cylinder along the fixed axis. The liquid cooling device according to any one of claims 1 to 4, further comprising a stripping blade.

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