KR100636720B1 - Evaporative condenser having wrinkle-type fin and the coil thereof - Google Patents

Abstract

An evaporative condenser coil with a wrinkle-type fin is provided to improve the washing efficiency by wrinkling the fin and increasing the radiating area. An evaporative condenser coil(10) with a wrinkle-type fin(16) comprises an inlet pipe(11) where the refrigerant with the high temperature and pressure of vapor; an inlet header(12) connected to the inlet pipe to distribute the refrigerant of the vapor; plural condensation pipes(13) connected with one end of the inlet header; an outlet header(14) connected with the other end of the plural condensation pipes; and an outlet pipe(15) connected to the outlet header. The condensation pipe is consecutively arranged with a first linear pipe of two rows whose section is streamlined and downwardly inclined and a second linear pipe bent at one end of the first linear pipe and downwardly inclined to the opposite direction from the first linear pipe. The wrinkle-type fin is installed between the linear pipes.

Description

Evaporative Condenser having Wrinkle-Type Fin and the Coil

1 is a structural diagram of a conventional evaporative condenser.

2 is a cross-sectional view of a condenser tube mounted on the condenser of FIG. 1.

3 is a structural diagram of an evaporative condenser according to an embodiment of the present invention.

4 is an enlarged view of a portion A of FIG. 3, and is a partial perspective view of the condenser tube used in the condenser coil according to the embodiment of the present invention.

5 is a side view of a condenser coil according to an embodiment of the present invention.

Figure 6 is a cross-sectional view of the condenser tube used in the condenser coil according to an embodiment of the present invention.

7 is a perspective view of a corrugated fin mounted on the condenser coil in accordance with an embodiment of the present invention.

FIG. 8 is a cross-sectional view taken along line B-B of FIG. 4, illustrating an engagement state of a condenser tube and a fin in a condenser coil according to an embodiment of the present invention. FIG.

         * Brief Description of Drawings *

DESCRIPTION OF SYMBOLS 1 Evaporative condenser 10 Condenser coil 11 Inlet pipe

13: condensation tube 16: fin 17: hard board

21: first straight pipe 22: second straight pipe 40: spray pipe

41: circulation pump 42: coolant splash plate 43: air circulation fan

44: air inlet 45: coolant storage box 46: housing

The present invention relates to an evaporative condenser and a condenser coil used in a refrigerating device, and in particular, by placing a corrugated fin in the condenser tube of the condenser, the heat transfer area can be maximized and the size of the condenser can be miniaturized. Since it is only necessary to install the fin only, it is very easy to wash later, and the condenser tube constituting the condenser condenser condensation structure to prevent the oil for the refrigerant stays in the condensation tube relates to an evaporative condenser that can increase the condensation efficiency.

Generally, a refrigerating device is composed of an evaporator, a compressor, a condenser, a throttling valve, and the like, while a refrigerant flows through a cooling tube of the evaporator, taking heat from air around a cooling tube, for example, in a low temperature region such as a refrigerator, Phase changes from the gas phase to the gas phase (while the air in the freezing space is deprived of heat, it becomes cold) and exits the evaporator. The refrigerant in the gas phase is compressed to a high temperature and high pressure by a compressor and then discharges heat to a high temperature region while passing through a condenser, and phase changes back into a liquid phase at a high temperature and high pressure, and then is depressurized by a throttling valve and supplied to an evaporator. At this time, the high temperature and high pressure refrigerant exiting the compressor exchanges heat with cooling water or cooling air flowing around the condenser of the condenser while passing through the condenser of the condenser and changes its phase from liquid phase to liquid phase. And the condensation method by the cooling air is called air cooling.

Condensers in a refrigerating device operated on the basis of this principle can be classified into various categories, and in this connection, the present invention relates to an evaporative condenser which introduces only the advantages of water cooling and air cooling.

In the dry method, the refrigerant depressurized by the throttling valve is introduced into the evaporator, and gradually evaporates during the process of the pipe without separating the liquid and vapor to the outlet of the evaporator. While the heat transfer effect is not good, it is suitable for a small refrigeration apparatus because it has a feature that the amount of refrigerant used or the refrigerant oil staying in the evaporator is small.

The liquid pump type pumps a liquid refrigerant of about 4 to 5 times the amount of refrigerant circulation required for freezing with a circulation pump in a low pressure liquid receiver where a low temperature low pressure gaseous refrigerant and a liquid refrigerant coexist with a circulating pump, and the refrigerant passes through an evaporator. While absorbing heat from the low temperature zone, some of the refrigerant is phase-changed into a gas, and the rest of the refrigerant exits the evaporator into the liquid phase and then introduced into the low pressure receiver. Thereafter, only the low temperature and low pressure gaseous refrigerant in the low pressure fluidizer is compressed into a gas of high temperature and high pressure by a compressor and then supplied to the condenser, and the gaseous refrigerant is passed through the condenser tube of the condenser by the spray tube. After the heat transfer to the cooling water sprayed around the condensation tube and the outside air sucked into the air circulation fan is condensed to phase change into a liquid refrigerant of high temperature and high pressure. Thereafter, the liquid refrigerant is introduced into the high pressure fluid reservoir, stored therein, and then passed through the throttling valve to become a low temperature liquid pressure and a gaseous refrigerant to be introduced into the low pressure fluid receiver. Such a liquid pump type is used for a large-capacity refrigeration apparatus because it has an advantage of high cooling efficiency and no retention of refrigeration oil because a sufficient amount of refrigerant is supplied to the evaporator or condenser. When the refrigerating device becomes large, the distance that the refrigerant flows becomes very long, and the pipe resistance in the evaporator or condenser increases, and the efficiency of the device decreases greatly. The pump is forced to adopt an amp pump type to supply to the evaporator.

In a conventional refrigeration apparatus using a liquid pump type, only the condenser tube in the form of a screw is used in the condenser, so that the size and length of the condenser tube are naturally long, and condensation of the condenser is inevitably followed. This is because the size of the refrigerating device requires a large installation space, high manufacturing cost and installation cost, as well as the amount of refrigerant used, the amount of cooling water and the circulating air is increased, and the air-cooling and water-cooling must be operated in parallel, so the compressor, the circulation pump It causes a problem that it takes a lot of power to drive the back.

In particular, the recent ban on the use of freon refrigerants in relation to environmental problems, the expansion of the use of natural refrigerants with high efficiency and high efficiency ammonia refrigerants as alternative refrigerants has led to the emergence of toxic problems of ammonia refrigerants. As safety regulations are strengthened, the development of a refrigeration apparatus that can satisfy the safety regulations and at the same time obtain high efficiency, that is, the development of an evaporator and a condenser is urgently required. In response to these demands, research on the evaporator is being actively conducted, while there is no research on the condenser.

The inventors have applied for the utility model registration of the 'evaporative condenser' in order to solve this problem, and received the utility model registration as Utility Model No. 330666, the specific configuration of which is shown in FIG.

The condenser 100 includes a condenser coil 110, a spray pipe 120, a circulation pump 121, a coolant scattering prevention plate 122, an air circulation fan 123, an air inlet 124, and a coolant storage box 125. It consists of a housing 126 surrounding it.

Among them, the condenser coil 110 includes an inlet tube 111 into which a refrigerant in a gas phase is introduced, an inlet header 112 connected to the inlet tube, and a plurality of condensation tubes 113 connected at one end thereof to the inlet header 112. ), An outlet header 114 connected to the other ends of the plurality of condensation tubes 113, and an outlet tube 115 connected to the outlet header 114, the outer peripheral surface of the condensation tube 115 It is composed of a plurality of fins 116 formed, and a hard plate 117 for fixing the position of the condenser coil.

As shown in FIG. 1, the fin 116 attached to the outer circumferential surface of the condensation tube has a flat plate shape, and thus has the following problems. First, when using a condenser, the scale is attached to the pin of the condenser to reduce the condensation efficiency, in order to increase the condensation efficiency by spraying water at a high pressure at regular intervals to remove the scale by washing the pin of the condenser coil. However, in the related art, the fins are mounted all over the longitudinal direction of the condenser coil, so that only the upper and lower portions of the fins are washed during washing, and the middle portion of the fins does not have water washing power, so that the scale of the middle portion cannot be removed. There was a difficulty in washing.

In addition, since the condensation tube 113 is horizontally connected, as shown in FIG. 2, the refrigerant (for example, ammonia) or the refrigerant oil R flowing into the condensation tube stays in the condensation tube, thereby reducing the condensation efficiency. There was this.

And, the condensation tube 113 has a circular cross section as shown in Figure 2, there is a dead zone (Dead Zone, 113a) that the fluid flowing in the F direction rides on the outer peripheral surface of the condensation tube 113 does not contact Therefore, there was a problem that the condensation efficiency is lowered.

The present invention has been made to solve the above problems, the object of the present invention is to condense the condensation tube by inclined to prevent the refrigerant or refrigerant oil from remaining in the condensation tube and condensation by making the cross-sectional shape of the condensation tube streamlined It is to provide an evaporative condenser and condenser coil to increase the efficiency.

Another object of the present invention is to provide a condenser and a condenser coil which is easy to be cleaned later by increasing the heat dissipation area by mounting the fin in a corrugated shape and attaching the fin only to a predetermined portion of the condenser tube in the longitudinal direction.

It is still another object of the present invention to provide an evaporative condenser and a condenser coil which has the side of a streamlined condensation tube flat and which can attach the mounting surface of the corrugated fin.

Still another object of the present invention is to provide an evaporative condenser and a condenser coil in which the lower end of the corrugated fin is formed to protrude below the lower end of the condensation tube, thereby improving condensation efficiency.

In order to achieve the above object, the present invention provides an inlet pipe into which a high temperature and high pressure refrigerant flows into a gas phase, an inflow header connected to the inflow pipe to distribute a refrigerant in a gas phase, and a plurality of condensation pipes connected to one end of the inflow header. And, in the condenser coil consisting of an outlet header connected to the other end of the plurality of condensation pipe, respectively, and an outlet pipe connected to the outlet header,
The condensation tube has a streamlined cross-section and is arranged in series with a first straight tube of two rows inclined downward and a second straight tube bent at one end of the first straight tube and inclined downward in a direction opposite to the first straight tube. Installed,
It provides a condenser coil, characterized in that the corrugated fin is provided between the arrangement of each of the straight pipes.

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In addition, the present invention provides a condenser coil, characterized in that the condensation tube is a side of the plane.

In addition, the present invention provides a condenser coil, characterized in that the fin is corrugated.

In addition, the present invention provides a condenser coil, characterized in that the lower edge of the fin protrudes below the lower end of the condensation tube.

The present invention also provides an evaporative condenser comprising the condenser coil.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings.

3 is a view showing the internal structure of a condenser according to an embodiment of the present invention.

As shown in FIG. 3, the condenser 1 includes a condenser coil 10, a spray tube 40, a circulation pump 41, a coolant scattering prevention plate 42, an air circulation fan 43, and an air intake 44. ), The cooling water storage box 45 and the housing 46 surrounding them.

The spray tube 40 serves to spray the cooling water to the condenser coil 10. The cooling water sprayed from the spray tube 40 flows along the circumference of the condenser coil and receives condensation heat from the refrigerant flowing in the condenser coil. It takes over. Therefore, the condensation efficiency of the condenser is determined according to the area where the condenser coil and the coolant contact (this is called 'heat dissipation area'), and the heat dissipation area must be increased to increase the condensation efficiency. In other words, the length of the condenser tube or the length of the condenser tube is increased in the evaporative condenser.

The air circulation fan 43 draws heat from the refrigerant in the condensation tube by forcibly flowing the air around the condensation tube through the air inlet 44.

The cooling water scattering prevention plate 42 prevents the cooling water sprayed from the spray tube from escaping to the outside by the air circulation fan 43 and is located between the spray tube 40 and the air circulation fan 43. .

The circulation pump 41 pumps the coolant to the spray tube, and the coolant container 45 stores a predetermined amount of coolant, and the coolant stored in the coolant container 45 is injected by heat transfer from the condenser coil. When the cooling water is evaporated, it is always kept in a constant amount because the amount of cooling water is replenished. As the conventional condenser does not have a fin and cannot secure a large heat transfer area, the conventional condenser uses external air and water in all four seasons, that is, by operating a circulation pump 41 to spray cooling water from the spray tube and at the same time, The condenser of the present invention should be condensed by sucking the outside air with the circulation fan 43. However, when the outside temperature is low due to a large heat transfer area using a fin, for example, the air is not driven by the circulation pump 41 from late autumn to early spring. High condensation efficiency can be obtained by only occasionally operating the circulation fan 43.

The condenser coil 10 includes an inlet pipe 11 through which a refrigerant in a gas phase flows in, a inflow header 12 connected to the inflow pipe 11, and a plurality of condensation pipes 13 connected at one end thereof to the inflow header. And an outlet header 14 connected to the other ends of the plurality of condensation tubes 13, and an outlet tube 15 connected to the outlet header 14, and formed on an outer circumferential surface of the condensation tube 13. It consists of a number of fins 16 and a hard plate 17 which is responsible for fixing the position of the condenser coil.

In addition, the fin may be provided only up to a predetermined portion D2 from the end of the inlet pipe through which the refrigerant of high temperature and high pressure flows without installing the fin throughout the longitudinal length D1 of the condenser coil.

4 is an enlarged perspective view of part A of FIG. 3.

As shown in FIG. 4, the condensation tube 13 is installed with the first straight tube 21 and the second straight tube 22 inclined in two rows, and a pin 16 is fixed therebetween.

As shown in FIG. 5, the condensation tube 13 is configured by sequentially connecting the first straight pipe 21 and the second straight pipe 22, and the first straight pipe 21 is formed in a predetermined manner. The inclination angle α is inclined downward, and the second straight tube 22 is bent backward at the end of the first straight tube 21 to be inclined downward at a predetermined inclination angle α as opposed to the first straight tube 21. The condensation tube 13 is completed by the arrangement of the first straight tube 21 and the second straight tube 22.

In addition, the condensation tube 13 has a streamlined cross section, as shown in FIG. 6, to increase the condensation efficiency. As shown in Fig. 2, if the cross section is circular, the streamline F becomes as shown in Fig. 2, resulting in a space where the fluid cannot contact, i.e., dead zone 113a, resulting in a heat dissipation area. The condensation efficiency is reduced, but the cross section is streamlined, so that the streamline F is formed near the lower peak 23 as shown in FIG. 6, so that dead space can be minimized hydrodynamically and condensation efficiency can be increased. .

And, according to another embodiment, the condensation tube 13 may be flat on both sides, to facilitate the mounting of the fins described below.

The fin 16 has a corrugation shape as shown in FIG. 7. When the fin 16 has a corrugation shape, a high heat dissipation area can be obtained compared to a conventional fin having a plate shape. Concave-convex may be repeated shape, it is possible to repeat the trapezoidal shape as shown in Figure 7 (b), in addition to the saw tooth shape in another embodiment, the pin 16 is the side (24), It is formed of an upper edge 25, a lower edge 26.

And, the height (D3) of the fin can be variously changed within the range to avoid the interference with the fins placed in the condensation tube beneath, but the lower edge 26 of the fin side lower edge (27) , It is preferable to protrude to FIG. 8b).

The operation of the apparatus of the present invention having the above structure will be described below.

8 is an explanatory view of the operation of the apparatus of the present invention.

Although described above, the height (D3) of the fin 16 can be variously changed within a range that can avoid interference with the fins placed in the condensation tube below, but the lower edge 26 of the fin is condensation tube It is preferable to protrude to the side lower edge 27, Fig. 8 (b).

If not, the streamline F is formed as shown in FIG. 8 (a) so that the fluid does not fall off the lower edge 26 of the fin and flows into the lower apex 23 of the condensation tube to reduce the condensation efficiency. do.

In addition, as shown in FIG. 3, even if the fin is provided only up to a predetermined portion D2 from the end of the inlet pipe through which the refrigerant of high temperature and high pressure flows without installing the fin throughout the longitudinal length D1 of the condenser coil. The condensation efficiency of the condenser coil of the prior art can be obtained. Therefore, when the pin is attached to the pin during use and the condensation efficiency is lowered, and the pin is washed for removing the scale, the pin is not positioned throughout the longitudinal length D1. Very easy. In the past, it was difficult to remove the scale attached to the intermediate portion. The predetermined portion D2 may be appropriately selected in consideration of the heat dissipation area of the fin or the ease of washing, but is less than the total length D1 in the longitudinal direction.

In addition, according to another embodiment, the condensation tube 13 may have a flat mounting surface 28, the plane of the pin 16 can be easily attached to the mounting surface 28 by welding or the like. .

In the above, the Applicant has described various embodiments of the present invention, but these embodiments are only examples of implementing the technical idea of the present invention, and any modifications or modifications may be made to the present invention as long as the technical idea of the present invention is implemented. It should not be considered further that it should be interpreted as falling within the scope of.

The present invention has the following effects by the above configuration.

According to the present invention, the condensation tube may be inclined to prevent the refrigerant or the refrigerant oil from remaining in the condensation tube, and the cross-sectional shape of the condensation tube may be streamlined to increase the condensation efficiency.

According to the present invention, the fins are formed in a pleated shape to increase the heat dissipation area, and the fin can be attached only to a predetermined portion of the condensation tube in the longitudinal direction, thereby facilitating subsequent cleaning.

The present invention has an effect that the side of the streamlined condensation tube is flat and the mounting surface of the corrugated fin can be attached thereto, so that the mounting of the corrugated fin is easy.

The present invention can form the lower end of the corrugated fin to protrude below the lower end of the condensation tube can achieve the effect of increasing the condensation efficiency.

Claims (6)

An inflow pipe into which a high temperature and high pressure refrigerant in the gas phase flows in, a inflow header connected to the inflow pipe to distribute the gaseous refrigerant, a plurality of condensation pipes connected to one end of the inflow header, and other ends of the plurality of condensation pipes In the condenser coil consisting of an outlet header connected to each, and an outlet pipe connected to the outlet header, The condensation tube has a streamlined cross-section and is arranged in series with a first straight tube of two rows inclined downward and a second straight tube bent at one end of the first straight tube and inclined downward in a direction opposite to the first straight tube. Installed, Evaporative condenser coil having a corrugated fin, characterized in that the corrugated fin is installed between the arrangement of each straight tube. delete The evaporative condenser coil having a corrugated fin according to claim 1, wherein the condensation tube is formed in a planar side surface thereof. delete The evaporative condenser coil having a corrugated fin according to claim 1, wherein the fin is provided such that a lower edge portion thereof protrudes below a lower peak of the condensation tube. delete

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