KR102062013B1 - Cooling tower - Google Patents

Abstract

The present invention relates to a cooling tower. The cooling tower includes: a casing including an inlet and an outlet; an exhaust fan installed at the outlet; a spray part located in the lower part of the exhaust fan and spraying high-temperature coolant, taken in from the outside, into the casing; a filler making the coolant come into contact with air to cool the coolant by leading the coolant sprayed through the spray part to flow downwards while leading the air taken into the casing to flow upwards; and a secondary cooling part including a thermoelement part placed outside the casing and outputting cold air, a heat pipe connected to the thermoelement part and led into the casing, and a plurality of cooling plates placed in the lower part of the filler and receiving cold air from the heat pipe to cool the coolant by coming into contact with the coolant dropped from the filler in a cooled state. According to the present invention, as the coolant, which is primarily cooled through contact with outdoor air while flowing through the filler, is re-cooled through the secondary cooling part using the heat pipe, proper heat exchange efficiency can be outputted, and thus, the size of the cooling tower can be reduced.

Description

Cooling tower

The present invention relates to a cooling tower, and more particularly, to a cooling tower having a good overall cooling efficiency by further cooling the cooled cooling water through the filler downward.

Cooling towers applied to various industrial sectors and cooling systems of large buildings are a type of heat exchanger that absorbs heat generated from the heat generating unit and discharges it to the atmosphere in order to maintain stable operation and performance of the system.

There are many kinds of such cooling towers depending on their operation, and air cooling is generally used. The general form of the air cooling system has a principle that the cooling water is brought into contact with the outside air to cool the heat of the cooling object (heated cooling water) and induces evaporation so that the cooling water is cooled by the latent heat of evaporation.

In addition, the air-cooled cooling tower is classified into a forced ventilation type and a natural convection type according to the inflow method of the outside air, and most of the cooling towers that can be seen in the vicinity are a forced ventilation type equipped with an exhaust fan device.

In addition, the forced draft cooling tower includes a counter flow type and a cross flow type. The counterflow-type cooling tower has a structure that induces cooling by allowing the outside air introduced through the suction port formed on the side wall of the casing to pass through at the same time as the hot cooling water injected through the injection nozzle in the reverse direction and to contact the same. On the other hand, the crossflow cooling tower has a configuration in which air and cooling water flow in a direction orthogonal to each other to perform heat exchange.

On the other hand, the basic structure of the counter-flow type cooling tower, the casing is provided with the inlet and exhaust ports on the side and top, the filler is installed inside the casing, the nozzle is installed on the top of the filler and sprays the cooling water to be cooled toward the filler, It is installed in the exhaust port and consists of an exhaust fan that pulls up the air inside the casing to the top.

When the exhaust fan is operated, the outside air of the casing flows into the casing and passes upwardly, and the cooling water is cooled by contacting the cooling water passing through the filler downward in time. Cooling water cooled by the outside air is collected in a collecting tank under the casing and then supplied to a necessary place.

However, the above-described conventional cooling tower has a structural disadvantage that the cooling process is performed almost inside the filler, and thus, when the size of the filler is small, the contact time between the outside and the cooling water is short and cooling performance is lowered. In other words, the overall size of the cooling tower is bound to be large. Of course, if the size of the cooling tower is large, there is a space constraint of the installation.

Domestic Utility Model Publication No. 20-0299997 (Injection nozzle and cooling tower using the same) Domestic Patent Publication No. 10-1672876 (White smoke reduction cooling tower using condenser)

The present invention has been made to solve the above problems, and an object thereof is to provide a cooling tower having good heat exchange efficiency.

The cooling tower of the present invention as a solution for achieving the above object comprises a casing having an inlet and an exhaust port; An exhaust fan installed at the exhaust port and discharging air in the casing to an upper portion of the casing; An injection unit positioned below the exhaust fan and spraying high temperature cooling water introduced from the outside into the casing; A filler installed at the lower side of the injector, allowing the coolant injected through the injector to pass downward and simultaneously allowing the air introduced into the casing to pass through the inlet to allow the coolant to cool in contact with the air; Secondary cooling of the coolant falling through the filler, the thermoelectric element is disposed outside the casing and is supplied with power from the power source, and connected to the thermoelectric element and connected to the thermoelectric element and drawn into the casing and the thermoelectric. Secondary cooling unit having a plurality of heat pipes for introducing the cool air of the device into the casing, a plurality of cooling plates disposed in the lower portion of the filler and cooled in contact with the coolant falling from the filler in the cool state received from the heat pipe Included.

In addition, the cooling plate; A conductive metal plate in the form of a rectangular plate of a certain thickness is installed to be inclined to the lower portion of the filler, and side grooves for guiding the downward flow of the coolant are formed at both ends of the upper surface in the width direction, and a flow delay for slowing the flow rate of the coolant is formed at the center. Grooves are formed.

In addition, while supplying cold air to the lower space of the filler, the cold air of a flow rate proportional to the flow rate of the cooling water passing through the filler, a cold air disposed outside the casing, a control unit for controlling the cold air fan, and It is disposed perpendicularly to the bottom of the casing and has a plurality of vertical pipes for ejecting the cold air supplied from the cold air to the lower space of the filler, and installed to be elevated in the upper portion of the vertical pipe, and has a receiving space for the falling coolant Sensing to raise and lower the lifting dish, the spring supporting the lifting dish, and the lowering degree of the lifting dish to the control unit, and to allow the control unit to adjust the amount of cold air flow as the weight of the cooling water contained in the receiving space increases. It is further provided with a flow-sensitive jet including a portion.

In addition, the lifting dish is formed with a drain hole for discharging the cooling water contained in the lifting dish at a constant speed to the outside of the lifting dish, and the sensing unit is provided on the side of the vertical pipe, the cooling water filled in the lifting dish. It has a distance sensor for detecting the height change of the lifting dish according to the weight.

Cooling tower of the present invention made as described above, through the filler and the first coolant through the contact with the outside air is cooled once more by the secondary cooling unit using the heat pipe can output a good heat exchange efficiency and Therefore, the size of the cooling tower itself can be reduced.

1 is a cross-sectional view showing the overall structure of a cooling tower according to an embodiment of the present invention.
FIG. 2 is a plan view of the cooling plate shown in FIG. 1.
3 is a perspective view of the cooling plate shown in FIG. 2.
4 is a partial cross-sectional view for explaining the structure of the flow-sensitive jet shown in FIG. 1.
5a and 5b is a view showing the operating principle of the flow-sensitive jet of FIG.

Hereinafter, one embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

The cooling tower which concerns on this invention has the structure which mounted the secondary cooling part and the flow sensitive injection part in order to improve the cooling efficiency of a cooling tower. The secondary cooling unit once again cools the cooling water after heat exchange with the air, and the flow-sensitive ejection unit lowers the temperature of the air that meets the cooling water.

The basic configuration of the cooling tower of the present invention, the casing having an inlet and an exhaust port; An exhaust fan installed at the exhaust port and discharging air in the casing to an upper portion of the casing; An injection unit positioned below the exhaust fan and spraying high temperature cooling water introduced from the outside into the casing; A filler installed at the lower side of the injector, allowing the coolant injected through the injector to pass downward and simultaneously allowing the air introduced into the casing to pass through the inlet to allow the coolant to cool in contact with the air; Secondary cooling of the coolant falling through the filler, the thermoelectric element is disposed outside the casing and is supplied with power from the power source, and connected to the thermoelectric element and connected to the thermoelectric element and drawn into the casing and the thermoelectric. Secondary cooling unit having a plurality of heat pipes for introducing the cool air of the device into the casing, a plurality of cooling plates disposed in the lower portion of the filler and contacted with the coolant falling from the filler in the cool state received from the heat pipe to cool Is done.

1 is a cross-sectional view showing the overall structure of the cooling tower 10 according to an embodiment of the present invention.

As shown, the cooling tower 10 according to the present embodiment, the casing 12, the exhaust fan 16, the eliminator 21, the injection unit 23, the filler 24, the secondary cooling unit ( 30), the flow sensitive injection unit 40 is configured.

The casing 12 takes the form of a cube or a substantially cylindrical shape, and has an inlet 14a at the lower end and an exhaust port 12d at the upper end. The intake port 14a is a passage through which external cold air flows into the casing 12, and is equipped with a louver 14. The louver 14 blocks water droplets falling from the filler 24 from flying out of the intake port. Naturally, air may pass through the louver 14.

The exhaust fan 16 is provided in the exhaust port 12d. The exhaust fan 16 is composed of a motor 16b and a rotary blade 16c supported by the motor support frame 16a, and serve to discharge air in the casing to the upper casing. By the action of the exhaust fan 16, the inside of the casing 12 is in a state of negative pressure, and air around the casing continuously flows into the casing 12 through the louver 14.

The eliminator 21 serves to filter out moisture in the air sucked upward by the exhaust fan 16, the configuration of which may be the same as the eliminator in a typical cooling tower.

In addition, the injection unit 23 injects high-temperature cooling water (cooling object) supplied from the outside into the casing 12 and injects downward, and is composed of an induction pipe 23a and an injection nozzle 23b. The injection nozzle 23b is arranged at the lower side of the induction pipe 23a and injects the cooling water supplied through the induction pipe 23a downward. The injected cooling water spreads widely and falls to the filler 24.

The filler 24 passes downwardly the cooling water injected from the injection nozzle 23b and passes upwardly the air introduced into the casing through the louver 14 so that the cooling water and the air come into contact with each other. The high temperature coolant is cooled through heat exchange with air and then falls below the filler 24. The air passes through the filler 24 and then is released to the atmosphere via the eliminator 21.

On the other hand, the secondary cooling unit 30, by passing through the filler 24 to cool the secondly cooled coolant once more, the thermoelectric element 33, a plurality of heat pipes 35, cooling And plate 37.

The thermoelectric element 33 is disposed under the casing 12 and outputs cold air by the electric power supplied from the power source 31. The thermoelectric element 33 itself is an electronic cooling device that implements heat absorption and heat generation by the Peltier effect. Naturally, the secondary cooling unit 30 uses cold air generated in the thermoelectric element unit 33.

The heat pipe 35 is introduced into the casing 12 in a state of being interviewed with the heat absorbing portion side of the thermoelectric element 33, that is, the portion where cold air is generated, thereby introducing cold air of the thermoelectric element into the casing. do. The bending structure of the heat pipe 35 disposed inside the casing 12 may vary as necessary. In addition, the size and number of applications of the heat pipe 35 can be changed as much as possible to improve the cooling capacity.

In addition, the cooling plate 37 is a conductive metal plate having a predetermined thickness, and receives cold air from the heat pipe 35 to stand in a cooled state, and serves to cool the cooling water secondly in contact with the falling cooling water. The cooling plate 37 can be manufactured from an aluminum plate, a copper plate, or an iron plate.

The cooling plate 37 takes the form of a rectangular plate and is fixed to be inclined at an angle of 10 degrees to 20 degrees with respect to the ground. In order to maintain the cooling plate 37 at the above angle, a cooling plate fixing frame (not shown) having an appropriate structure is applied to the lower portion of the filler 24.

In addition, the number of applications of the cooling plate 37 may vary as needed. For example, in this embodiment, three cooling plates 37 are applied as shown in FIG. 2, but one or four or more cooling plates may be mounted.

FIG. 2 is a view illustrating a planar structure of the cooling plate illustrated in FIG. 1.

Referring to FIG. 2, it can be seen that the three cooling plates are arranged in a partially overlapped state. For example, different cooling plates are installed on both upper sides of the central cooling plate 37. Reference numeral 37c denotes a through hole through which the vertical pipe 41 to be described later passes.

3 is a perspective view of the cooling plate 37.

As shown, the side groove 37a and the flow delay groove 37b are formed on the upper surface of the cooling plate 37. The side grooves 37a are straight grooves formed at both ends in the width direction of the cooling plate 37 to guide the downward flow of the cooling water flowing down the inclined cooling plate 37, and the cooling water escapes in the width direction of the cooling plate. Suppress as much as possible. The cooling water moves along the inclined direction of the cooling plate 37 in a state held between the side grooves 37a and then falls into the water collecting tank (12e in FIG. 1). The sump 12e is a space where the cooled coolant collects. Cooling water collected in the sump 12e exits through the outlet 12f.

The flow delay groove 37b is a groove formed between the side grooves 37a and serves to slow down the flow rate of the cooling water flowing down. The reason for slowing the flow rate of the cooling water is to increase the heat exchange time between the cooling water and the cooling plate 37. As long as it can perform this function, the shape of the flow delay groove 37b can be changed in various ways.

On the other hand, the flow-sensitive jet 40 is, while supplying cold air to the lower space of the filler 24, serves to supply the cold air of the flow rate proportional to the flow rate of the cooling water falling from the filler. For example, when the flow rate of the falling coolant increases, the supply amount of the cold wind increases, and when the flow rate of the coolant decreases, the supply amount of the cold wind decreases. The flow-sensing spray unit 40 serves to supply cold air, and together with the secondary cooling unit 30, further increases the cooling efficiency of the cooling tower 10.

4 is a partial cross-sectional view for explaining the configuration of the flow-sensitive jet 40, Figure 5a and 5b is a view showing the principle of operation of the flow-sensitive jet of Figure 4.

As shown in the drawing, the flow rate-sensing ejection section 40 includes a control section 45, a cooler 46, a plurality of vertical tubes 41, a lifting dish 43, a spring 42, and a distance sensor 44 as a sensing section. ).

The cold air blower 46 is disposed below the bottom 12h of the casing 12 to generate cold air. The amount of cold air generated by the cooler 46 is controlled by the controller 45. Cool air produced in the cooler 46 is supplied to the vertical tube 41 through the induction tube (48).

The vertical pipe 41 is a cylindrical member erected perpendicularly to the bottom portion 12h of the casing, and directs the cold air raised from the cold air blower 46 to blow up into the lower space of the filler. The number of applications of the vertical pipe 41 may vary as necessary.

In addition, the lifting guide 41b and the spring support jaw 41c are provided inside the vertical pipe 41. The lifting guide 41b serves to support the vertical rod 43g to be described later. The vertical rod 43g is capable of elevating only in the vertical direction while being supported by the elevating guider 41b and not shaking laterally.

The spring support jaw 41c is a protrusion supporting the lower end of the spring 42. The spring 42 elastically supports the dish main body 43a while being supported by the spring support jaw 41c. The spring 42 is in an expanded state when the receiving space 43b to be described later is empty, and is compressed under the influence of weight as the level of the cooling water inside the receiving space 43b increases. When the spring 42 is compressed, the interval between the upper end of the vertical pipe 41 and the dish body 43a is gradually narrowed. Description thereof will be described later.

The distance sensor 44 is located on the side of the vertical pipe 41 in a state supported by the sensor support 44a. The distance sensor 44 is located vertically below the sensing unit 43d to be described later, and detects a distance between the distance sensor 44 and the sensing unit 43d and transmits the detected contents to the control unit 45.

On the other hand, the lifting plate 43 includes a dish main body 43a, a sensing unit 43d, and a vertical rod 43g.

The dish body 43a takes the form of a dish and is arranged to be elevated on an upper portion of the vertical pipe 41. The dish body 43a blocks the cooling water from entering the inside of the vertical pipe 41 and also serves to contain the cooling water falling through the filler 24.

The dish main body 43a is provided with a receiving space 43b. The accommodation space 43b is a concave groove in which the coolant falls, and its capacity may vary depending on the case. In particular, a drainage hole 43c is formed at one side of the dish body 43a. The drain hole 43c serves to discharge the cooling water contained in the dish body 43a at a constant speed.

If the flow rate exiting through the drainage hole 43c is equal to or greater than the flow rate of the cooling water flowing into the accommodation space 43b, the cooling water does not accumulate in the accommodation space 43b. That is, the spring 42 is to maintain the expanded state as much as possible. In other words, the cold wind outflow passage between the inclined surface 43e of the dish main body 43a and the upper end of the vertical pipe 41 in the state where the lifting dish 43 is located at the top dead center is opened to the maximum.

However, if the flow rate is large compared to the flow rate exiting, the water level inside the receiving space (43b) is gradually increased, the spring 42 is compressed and the lifting dish 43 is gradually lowered as the weight of the cooling water itself increases. do. When the cooling water finally overflows the receiving space 43b, the lifting dish 43 does not go down anymore. The lifting dish 43 has reached the bottom dead center. Even if the lifting dish 43 is located at the bottom dead center, the cold air outlet hole of the upper end of the vertical pipe 41 is not blocked.

FIG. 5A illustrates a state where the lifting dish 43 is not lowered, and FIG. 5B is a state in which the lifting dish 43 is completely lowered. The distance H between the top dead center and the bottom dead center of the lifting dish depends on the volume of the accommodation space 43b and the elastic force of the spring.

On the other hand, the distance sensor 44 detects the degree of falling of the lifting dish 43 and transmits the detection content to the control unit 45, the control unit to increase the amount of cold air generated through the cold air. The controller 45 controls the output of the cooler 46 to increase the amount of generated wind in proportion to the degree of falling of the lifting dish. That is, the more the lifting dish descends, the greater the amount of cold air generated. In other words, the amount of cool air is adjusted in proportion to the amount of coolant falling through the filler 24.

As a result, the cooling tower 10 according to the present embodiment configured as described above, once again using the secondary cooling unit 30 and the flow-sensing ejection unit 40 for the cooling water primarily cooled in the filler 24. Since the additional cooling, the cooling efficiency of the cooling tower 10 itself is good and can increase the cooling rate of the cooling water.

As mentioned above, although this invention was demonstrated in detail through the specific Example, this invention is not limited to the said Example, A various deformation | transformation is possible for a person with ordinary knowledge within the scope of the technical idea of this invention.

10: cooling tower 12: casing 12d: exhaust vent
12e: sump 12f: outlet 12g: leg
12h: bottom 14: louver 14a: intake vent
16: Exhaust fan 16a: Motor support frame 16b: Motor
16c: rotary wing 21: eliminator 23: injection unit
23a: guide pipe 23b: spray nozzle 24: filler
30: secondary cooling unit 31: power source 33: thermoelectric element
35: heat pipe 37: cooling plate 37a: side groove
37b: flow delay groove 37c: through hole 40: flow sensitive ejection part
41: Vertical pipe 41b: Lift guider 41c: Spring support jaw
42: spring 43: lifting plate 43a: dish body
43b: Accommodating space 43c: Drainage hole 43d: Sensing part
43e: Slope 43g: Vertical rod 44: Distance sensor
44a: sensor support 45: control unit 46: cold air fan
48: Induction tube

Claims (4)

A casing having an intake port and an exhaust port; An exhaust fan installed at the exhaust port and discharging air in the casing to an upper portion of the casing; An injection unit positioned below the exhaust fan and spraying high temperature cooling water introduced from the outside into the casing; A filler installed at the lower side of the injector, allowing the coolant injected through the injector to pass downward and simultaneously allowing the air introduced into the casing to pass through the inlet to allow the coolant to cool in contact with the air; Secondary cooling of the coolant falling through the filler, the thermoelectric element is disposed outside the casing and is supplied with electric power from the power source, and connected to the thermoelectric element and drawn into the casing and connected to the thermoelectric element. Secondary cooling unit having a plurality of heat pipes for introducing the cool air of the element into the casing, a plurality of cooling plates disposed in the lower portion of the filler and contacted with the coolant falling from the filler in the cool state received from the heat pipe to cool Included,
The cold plate is; A conductive metal plate in the form of a rectangular plate of a predetermined thickness is installed to be inclined to the lower portion of the filler, and side grooves for guiding the downward flow of the coolant are formed at both ends in the width direction of the upper surface, and a flow delay for slowing the flow rate of the coolant is provided at the center. Grooved cooling tower. delete The method of claim 1,
Supplying cold air to the lower space of the filler, supplying the cold air of the flow rate proportional to the flow rate of the cooling water passing through the filler,
A cold air fan disposed outside the casing,
A control unit for controlling the cold air fan;
A plurality of vertical tubes disposed perpendicular to the bottom of the casing to blow cold air supplied from the cold air fan into the lower space of the filler;
An elevating dish installed on the upper portion of the vertical pipe so as to be elevated and lowered according to an increase in weight of the coolant contained in the containing space with an accommodating space for falling cooling water;
A spring for supporting the lifting dish,
Cooling tower further comprising a flow-sensing spout unit for sensing the falling degree of the lifting dish and transmitting to the control unit, the sensing unit for the control unit to adjust the amount of cold air. The method of claim 3,
The lifting dish is provided with a drainage hole for discharging the cooling water contained in the lifting dish to the outside of the lifting dish at a constant speed.
The sensing unit is installed on the side of the vertical pipe, the cooling tower is a distance sensor for detecting the height change of the lifting dish according to the weight of the cooling water filled in the lifting dish.

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