WO2013094912A1

WO2013094912A1 - Disassemblable and washable primary surface heat exchanger

Info

Publication number: WO2013094912A1
Application number: PCT/KR2012/010691
Authority: WO
Inventors: Youngjong CHOI; Sanghyuk WOO
Original assignee: Innowill Corp.
Priority date: 2011-12-23
Filing date: 2012-12-10
Publication date: 2013-06-27
Also published as: KR20130073533A; US20140332183A1; KR101284183B1

Abstract

The present invention relates to a disassemblable and washable primary surface heat exchanger, and more particularly, to a disassemblable and washable primary surface heat exchanger which includes a plurality of heat exchange cells disassemblably mounted inside an openable housing and having primary surface plates to thereby be easily maintained and repaired and to provide economic feasibility and thermal efficiency. Disclosed therein is a disassemblable and washable primary surface heat exchanger including: heat exchange cells, each of which includes: a first heat exchange plate; a second heat exchange; and supporting means; and a housing.

Description

DISASSEMBLABLE AND WASHABLE PRIMARY SURFACE HEAT EXCHANGER

The present invention relates to a disassemblable and washable primary surface heat exchanger, and more particularly, to a disassemblable and washable primary surface heat exchanger which includes a plurality of heat exchange cells disassemblably mounted inside an openable housing and having primary surface plates to thereby be easily maintained and repaired and to provide economic feasibility and thermal efficiency.

Heat exchangers are apparatuses for exchanging heat between a high-temperature fluid and a low-temperature fluid and are used in various fields. For instance, the heat exchangers are used in power plants, gas turbines, heating devices, air conditioners, refrigerating machines, chemical industries, and so on.

A conventional tube-type heat exchanger has a structure that heat is transferred through tubes in which heating medium flows and fins formed on the tubes in order to enhance thermal efficiency. Such a tube-type heat exchanger has a problem in that it is difficult to miniaturize and its utilization fields are restricted because the heat transfer area to volume ratio (m2/m3) of the tube-type heat exchanger is low. Furthermore, the conventional tube-type heat exchanger has another problem in that scale is formed inside the tubes by impurities contained in the thermal medium, such as soot, dust or terrestrial heat water, so that the tubes are stopped. Additionally, the conventional tube-type heat exchanger is expensive because the entire heat exchanger must be replaced due to difficulty in repair of the tubes to remove the scale.

A conventional fin-plate type heat exchanger generally has a structure that a plurality of primary surface plates are laminated. Moreover, the conventional fin-plate type heat exchanger further includes a secondary surface formed by a plurality of fins vertically welded on the surface of the primary surface plate or by corrugated plates disposed between heat exchange plates.

For instance, Korean Patent Laid-open No. 1992-16807 discloses a flat plate type heat exchanger in which a plurality of heat transfer plates for gas and a plurality of heat transfer plates for air are laminated oppositely at right angles to each other and are mounted inside a rectangular frame to thereby recover waste heat. In order to solve the problems of the tube-type heat exchanger, such a flat plate type heat exchanger has wider channels of the heat transfer plates to thereby clean the heat exchanger, but still has the problem in that the heat transfer area to volume ratio (m2/m3) of the heat exchanger is low. So, in order to obtain necessary thermal efficiency, the flat plate type heat exchanger must be manufactured larger. In addition, the flat plate type heat exchanger has another problem in that it is not easy to clean or wash because it is not disassemblable.

Accordingly, the present invention has been made in an effort to solve the above-mentioned problems occurring in the prior arts, and it is an object of the present invention to provide a disassemblable and washable primary surface heat exchanger which includes a plurality of heat exchange cells disassemblably mounted inside an openable housing and having primary surface plates to thereby be easily maintained and repaired and to provide economic feasibility and thermal efficiency.

The above and other objects, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention in conjunction with the accompanying drawings.

To achieve the above objects, the present invention provides a disassemblable and washable primary surface heat exchanger including: heat exchange cells, each of the heat exchange cells including: a first heat exchange plate having a first primary surface part which has an uneven surface formed partially or entirely; a second heat exchange plate having a second primary surface part which has an uneven surface formed partially or entirely so as to form a flow passage of a first fluid by getting in contact with one side of the first primary surface part; and supporting means for connecting and supporting at least one side of the first heat exchange plate and the second heat exchange plate; and a housing disassemblably accommodating the heat exchange cells laminated in such a way as to form a flow passage of a second fluid, which flows in the opposite direction to the first fluid, the housing being opened in at least one side to allow a user to wash the heat exchange cells.

Moreover, the uneven surfaces of the first and second primary surface parts are formed on flat surfaces of the first and second primary surface parts in a wave form.

Furthermore, the first and second primary surface parts are formed in a polygonal shape or in a circular shape.

Additionally, the uneven surfaces of the first and second primary surface parts contain the middle portions of the first and second heat exchange plates.

In addition, each of the heat exchange cells includes: a first fluid inlet part formed adjacent to an edge of one side in such a way as to communicate with the first fluid flow passage; and a first fluid outlet part formed adjacent to an edge of the other side in such a way as to communicate with the first fluid flow passage.

Moreover, the first fluid inlet part includes inlet joining portions which respectively have a specific height and are hollow so as to get in contact with each other when the cells are laminated to thereby form an inflow passage of the first fluid, and the first fluid outlet part comprises outlet joining portions which respectively have a specific height and are hollow so as to get in contact with each other when the cells are laminated to thereby form an outflow passage of the first fluid.

Furthermore, at least a portion of the inlet joining portion and the outlet joining portion is opened toward the first fluid flow passage.

Additionally, the first fluid inlet part further includes a first sealing means mounted on at least one side of the inlet joining portions so that the inlet joining portions get closer and get in contact with each other, and the first fluid outlet part further comprises a second sealing means mounted on at least one side of the outlet joining portions so that the outlet joining portions get closer and get in contact with each other.

In addition, the first fluid inlet part and the first fluid outlet part are opposed to each other relative to the first and second primary surface parts.

The disassemblable and washable primary surface heat exchanger further includes: a first fluid supply part mounted at one side of the housing to supply the first fluid to the first fluid flow passage; a first fluid discharge part mounted at one side or the other side of the housing to discharge the first fluid passing through the flow passage; a second fluid supply part mounted at a side of the housing to supply the second fluid to the second fluid flow passage and to let the second fluid flow in the opposite direction to the first fluid; and a second fluid discharge part mounted at a side of the housing to discharge the second fluid passing through the flow passage, the second fluid discharge part being located at the opposite side of the second fluid supply part.

Moreover, the heat exchange cells are laminated parallel to the side of the housing where first fluid supply part and the first fluid discharge part are mounted but is laminated perpendicularly to the side of the housing where the second fluid supply part and the second fluid discharge part are mounted.

Furthermore, the housing further includes guide means for guiding at least a portion of the heat exchange cells so that both ends of the supporting means are aligned well when the plural heat exchange cells are laminated.

Additionally, the guide means are spaced apart from each other so as to respectively guide one end of the support means and the other end of the support means, and are arranged perpendicularly to the laminated plane of the heat exchange cells.

Moreover, the guide means are formed on the side of the inner wall of the housing which is in contact with the support means.

In addition, the housing includes: a cell receiving part opened at one side and adapted for receiving the heat exchange cells which are laminated; a cover part adapted for sealing the opened side of the cell receiving part; and fastening means for connecting the cell receiving part and the cover part in such a fashion that they are opened and closed.

The disassemblable and washable primary surface heat exchanger according to the present invention provides an active heat transfer effect by a convection current without forming the secondary surface part due to the concavo-convex shape of the primary surface part besides heat transfer through the primary surface part. Accordingly, the disassemblable and washable primary surface heat exchanger can obtain high heat transfer efficiency despite of a small volume because the heat transfer area to volume ratio (m2/m3) of the heat exchanger is high.

Moreover, the disassemblable and washable primary surface heat exchanger according to the present invention is simple in structure and easy to manufacture, and can reduce manufacturing expenses because it does not form the secondary surface part.

Furthermore, the disassemblable and washable primary surface heat exchanger according to the present invention is easy to clean and to maintain and repair.

Additionally, the disassemblable and washable primary surface heat exchanger according to the present invention can be used for a long period of time because it is washable.

The accompanying drawings illustrate a preferred embodiment of the present invention and serve to promote understanding of the following detailed description and the technical idea of the present invention, and hence, it will be understood by those of ordinary skill in the art that the present invention should not be restricted and interpreted to the exemplary embodiment and drawings.

FIG. 1 is a perspective view of a disassemblable and washable primary surface heat exchanger according to a preferred embodiment of the present invention.

FIG. 2 is a partially exploded perspective view of the disassemblable and washable primary surface heat exchanger according to the present invention.

FIG. 3 is a plan view of the disassemblable and washable primary surface heat exchanger according to the present invention.

FIG. 4 is an exploded perspective view of heat exchange cells of the disassemblable and washable primary surface heat exchanger according to the present invention.

FIG. 5 is a sectional view taken along the line of A-A of FIG. 3.

FIG. 6 is a sectional view taken along the line of B-B of FIG. 3.

FIG. 7 is a view showing an operational state of the disassemblable and washable primary surface heat exchanger according to the present invention.

The 'left side' and the 'right side' mentioned in the following mean the left side and the right side shown in FIG. 3. Moreover, the heat exchange method using a primary surface means the method that heat is directly transferred from a high-temperature fluid to a low-temperature fluid in a state where the primary surface is interposed between the high-temperature fluid and the low-temperature fluid. Furthermore, the heat exchange method using a secondary surface means the method that heat is additionally transferred from the primary surface to the secondary surface and is all transferred between the secondary surface and the fluid by forming an extended heat transfer surface, such as fins, on the primary surface.

FIG. 1 is a perspective view of a disassemblable and washable primary surface heat exchanger according to a preferred embodiment of the present invention, FIG. 2 is a partially exploded perspective view of the disassemblable and washable primary surface heat exchanger, and FIG. 3 is a plan view of the disassemblable and washable primary surface heat exchanger. Referring to FIGS. 1 to 3, the disassemblable and washable primary surface heat exchanger according to a preferred embodiment of the present invention will be described in detail.

The disassemblable and washable primary surface heat exchanger according to a preferred embodiment of the present invention includes heat exchange cells 100, a housing, a first fluid supply part 330, a first fluid discharge part 340, a second fluid supply part 310, and a second fluid discharge part 320.

FIG. 4 is an exploded perspective view of the heat exchange cells, FIG. 5 is a sectional view taken along the line of A-A of FIG. 3, and FIG. 6 is a sectional view taken along the line of B-B of FIG. 3. Referring to FIGS. 1 to 6, the heat exchange cells 100 will be described in detail.

Each of the heat exchange cells 100 includes a first heat exchange plate 110, a second heat exchange plate 120, supporting means 130, a first fluid inlet part 140, and a first fluid outlet part 150.

As shown in FIG. 4, the first heat exchange plate 110 is a rectangular metal sheet. But, the first heat exchange plate 110 may have one of various shapes, such as trapezoids, diamonds, parallelograms, polygons of various forms, and circles, as occasion demands. A first primary surface part 111 of a parallelogram shape is formed at the middle of the first heat exchange plate 110.

The first primary surface part 111 has a wave-shaped uneven surface extending in a transverse direction and is repeatedly formed in a longitudinal direction. The first primary surface part 111 is generally in a parallelogram shape, and may have one of various shapes, such as trapezoids, diamonds, and other shapes, as occasion demands. The uneven surface formed on the first primary surface part 111 may be different in width between protruding portions and depressed portions. As shown in FIG. 3, the upper side and the lower side of the parallelogram which is the shape of the first primary surface part 111 are respectively parallel to and adjacent to the upper side and the lower side of the first heat exchange plate 110.

As shown in FIG. 4, the first heat exchange plate 110 having the first primary surface part 111 has an edge bent downwardly in a shape of "?". The edge of the first primary surface part 111 is in surface contact with the second heat exchange plate 120, which will be described later. Concretely, a through hole is formed between the right side of the first heat exchange plate 110 and the first primary surface part 111 in such a way as to be adjacent to a lower edge, and another through hole is formed between the left side of the first heat exchange plate 110 and the first primary surface part 111 in such a way as to be adjacent to the upper edge. Such through holes are flow passages of a first fluid 10 formed inside the heat exchange cell 100 to let the first fluid 10 flow in and out, and in detail, the through holes are respectively the first fluid inlet part 140 and the first fluid outlet part 150 which communicate with each other.

The second heat exchange plate 120 is a rectangular metal sheet having the same area as the first heat exchange plate 110. The second heat exchange plate 120 may also have one of various shapes like the first heat exchange plate 110, but it is preferable that the second heat exchange plate 120 is at least in a shape of the same area as the first heat exchange plate 110. The second heat exchange plate 120 has a second primary surface part 121 formed at the middle.

The second primary surface part 121 has an upside-down shape of the first primary surface part 111. In other words, as shown in FIG. 5, an uneven surface of the second primary surface part 121 is symmetric to the uneven surface of the first primary surface part 111 with respect to the x-axis. As shown in FIG. 4, the second primary surface part 121 is formed on the second heat exchange plate 120 in the same way as the first primary surface part 111 in such a way as to correspond to the first primary surface part 111 arranged on the first heat exchange plate 110.

As shown in FIG. 4, the second heat exchange plate 120 having the second primary surface part 121 has an edge bent upwardly in a shape of "┌". The "┌"-shaped edge abuts on the "?"-shaped edge of the first heat exchange plate 110. Moreover, through holes are respectively formed between both sides of the second heat exchange plate 120 and the second primary surface part 121. The through holes are formed at the same positions corresponding to the through holes of the first heat exchange plate 110.

The first heat exchange plate 110 and the second heat exchange plate 120 are made of metallic material, such as stainless steel, iron, nickel-based alloy, and so on. Additionally, in the first and second

heat exchange plates

110 and 120, the metal sheet having the uneven surface is cut into the rectangular shape, and the remaining part excepting the parallelogram shape is pressed flatways by a press so that the first and second

primary surface parts

111 and 121 are formed. After that, the edge of the first heat exchange plate 110 is press-molded in the shape of "?" and the edge of the second heat exchange plate 120 is press-molded in the shape of "┌".

The supporting means 130 includes upper supporting means and lower supporting means. The upper supporting means is supporting means to connect an upper faying surface of the first heat exchange plate 110 and the second heat exchange plate 120. As shown in FIG. 4, the upper supporting means includes a first upper supporting means 131a and a second upper supporting means 131b. The first upper supporting means 131a is a metal bar and may have a groove formed at a portion thereof so that an upper edge of the first heat exchange plate 110 is inserted thereinto. The second upper supporting means 131b is also a metal bar and may have a groove formed at a portion thereof so that the upper edge of the second heat exchange plate 120 is inserted thereinto. It is preferable that the upper supporting means is equal in length to or longer than the upper edges of the first heat exchange plate 110 and the second heat exchange plate 120. The lower supporting means is supporting means to connect a lower faying surface of the first heat exchange plate 110 and the second heat exchange plate 120, and as shown in the drawing, includes a first lower supporting means 132a and a second lower supporting means 132b. The first lower supporting means 132a is identical in shape and material with the first upper supporting means 131a, and the second lower supporting means 132b is identical in shape and material with the second upper supporting means 131b.

The first fluid inlet part 140 corresponds to the right side through holes of the first heat exchange plate 110 and the second heat exchange plate 120. The first fluid inlet part 140 is an inlet to supply the first fluid 10 into the heat exchange cell 100 and includes an inlet joining portion 141 and a first sealing means 143.

As shown in FIG. 6, the inlet joining portion 141 is in an approximately cylindrical shape having specific height (L) and inner diameter, and may be made of metallic material. Concretely, the inlet joining portion 141 includes an upper inlet joining portion 141a and a lower inlet joining portion 141b. The upper inlet joining portion 141a has a flange formed at a rim of an opening of one side of the cylinder having an inner diameter. The flange has a recess formed in one side thereof so as to insert the first sealing means 143 thereinto. The recess is formed in a circle, but may be changed according to the shape of the first sealing means 143. Additionally, as shown in FIG. 4, a side wall of the upper inlet joining portion 141a abutting on the opening of the other side is opened partially. The lower inlet joining portion 141b has the same shape as the upper inlet joining portion 141a, and the inlet joining portion 141 is formed in such a fashion that the flanges of the upper and lower

inlet joining portions

141a and 141b face each other and are joined together. In this instance, the upper and lower

inlet joining portions

141a and 141b are joined together in such a fashion that a portion of the upper inlet joining portion 141a is inserted into the through hole formed in the first heat exchange plate 110 and a portion of the lower inlet joining portion 141b is inserted into the through hole formed in the second heat exchange plate 120. The inlet joining portion 141 has the flanges respectively formed at the openings of both sides of the cylinder having the inner diameter and is partially opened at the central portion of the side wall. The inlet joining portions 141 of the heat exchange cells 100 form one passage when the heat exchange cells 100 are laminated and the inlet joining portions 141 are in contact with each other. The inlet joining portion 141 may have any shape if it can communicate with the flow passage of the first fluid 10 formed inside the heat exchange cell 100.

The first sealing means 143 is provided to get the inlet joining portion 141s closer to each other to prevent a leakage of the first fluid 10 between the contact surfaces of the inlet joining portions 141. The first sealing means 143 may be in a ring shape and is made of an elastic material nearly having no thermal strain. For instance, the first sealing means 143 may be made of a circular rubber material.

The first fluid outlet part 150 corresponds to the left side through holes of the first heat exchange plate 110 and the second heat exchange plate 120. The first fluid outlet part 150 serves to discharge the first fluid 10 passing through the heat exchange cell 100, and includes an outlet joining portion 151 and a second sealing means 153. The outlet joining portion 151 includes an upper outlet joining portion 151a and a lower outlet joining portion 151b, and the upper outlet joining portion 151a and the lower outlet joining portion 151b are respectively identical in structure and material with the upper and lower

inlet joining portions

141a and 141b. The second sealing means 153 has the same structure and material as the first sealing means 143.

The housing includes a cell receiving part 210, a cover part 220, fastening means 230, and guide means 240.

The cell receiving part 210 has an empty space for receiving the heat exchange cells 100 and is a case opened at one side. As shown in FIG. 3, the cell receiving part 210 may have a bottom formed in a shape of a rectangle having semicircular both sides. In this instance, as shown in the drawing, a lateral length of the bottom is identical with a lateral length of the heat exchange cell 100 so that at least one heat exchange cell 100 is accommodated in the housing in parallel to the bottom. Moreover, it is preferable that a perpendicular length of the bottom is longer than a perpendicular length of the heat exchange cell 100. Furthermore, a height of the cell receiving part 210 is determined according to the number of the laminated heat exchange cells 100, namely, according to a target thermal efficiency of the heat exchanger. Additionally, the cell receiving part 210 may further include a flange portion 211 formed at the opened edge of the cell receiving part 210 in such a way as to be in contact with the cover part 220, which will be described later. The flange portion 211 has a plurality of through holes through which the fastening means 230 passes.

The cover part 220 is a plate to cover and seal an opened portion of the cell receiving part 210. Concretely, the cover part 220 has the same shape as the bottom of the cell receiving part 210, but is formed as large as an edge of the cover part 220 gets in contact with the flange portion 211. The edge getting in contact with the flange portion 211 has a plurality of through holes corresponding to the through holes of the flange portion 211.

Such a housing is made of metallic material which is strong on thermal strain.

The fastening means 230 is provided to detachably join the cell receiving part 210 and the cover part 220. For instance, the fastening means 230 includes bolts and nuts or rivets.

The guide means 240 serves to firmly laminate the heat exchange cells 100 without welding and is formed inside the cell receiving part 210. In detail, as shown in FIGS. 2 and 3, the guide means 240 includes an upper guide means 241 and a lower guide means 242. The upper guide means 241 fasten both ends of the upper supporting means. The upper guide means 241 are spaced apart from each other as far as the length of the upper supporting means and are formed in two lines. Moreover, the upper guide means 241 are in the form of a straight projection formed on the inner wall of the cell receiving part 210 with which the upper supporting means are in contact. Furthermore, the upper guide means 241 are formed perpendicularly to the upper support means. The lower guide means 242 are formed on the inner wall of the cell receiving part 210 so as to guide the lower supporting means in the same way as the upper guide means 241. That is, the lower guide means 242 are formed on the inner wall of the cell receiving part 210 in the same shape as the upper guide means 241.

The housing further includes the first fluid supply part 330, the first fluid discharge part 340, the second fluid supply part 310, and the second fluid discharge part 320, and in this instance, the housing has a through hole communicating with the inside.

The first fluid supply part 330 is a supply tube of the first fluid 10 formed on one side of the cover part 220. The first fluid supply part 330 which is formed in the cylindrical shape having the inner diameter stands on the cover part 220 and is fixed to the cover part 220 by welding. The first fluid supply part 330 is positioned corresponding to the inlet joining portion 141 to thereby communicate with the first fluid inlet part 140.

The first fluid discharge part 340 which is formed in the same shape as the first fluid supply part 330 stands on the cover part 220 and is fixed to the cover part 220 by welding. In this instance, the first fluid discharge part 340 is positioned corresponding to the outlet joining portion 151 to thereby communicate with the first fluid outlet part 150.

The second fluid supply part 310 is a tube to supply a second fluid 20 between the laminated heat exchange cells 100. The second fluid supply part 310 is a cylindrical tube having an inner diameter, and as shown in FIGS. 2 and 3, is fixed to the outer side wall of the cell receiving part 210 by welding.

The second fluid outlet part 320 is a tube to discharge the second fluid 20 getting out of the heat exchange cells 100. The second fluid outlet part 320 is a cylindrical tube having an inner diameter, and as shown in FIG. 3, is formed on the outer side wall of the cell receiving part 210 in such a way as to be opposed to the second fluid supply part 310, and is fixed by welding.

Referring to FIGS. 1 to 6, a method of manufacturing the disassemblable and washable primary surface heat exchanger according to the present invention will be described. The method of manufacturing the disassemblable and washable primary surface heat exchanger according to the present invention generally includes a heat exchange cell assembling step, a heat exchange cell laminating step, and a sealing step.

In the heat exchange cell assembling step, first, the first heat exchange plate 110 and the second heat exchange plate 130 are stacked up. Concretely, as shown in FIG. 5, the first primary surface part 111 and the second primary surface part 121 are stacked up in contact with each other so that the flow passage of the first fluid 10 is formed. Moreover, the edges of the first heat exchange plate 110 and the second heat exchange plate 120 are welded. In other words, the contact surfaces of the "?"-shaped edge of the first heat exchange plate 110 and the "┌"-shaped edge of the second heat exchange plate 120 are welded. Additionally, the upper edge of the first heat exchange plate 110 is inserted into the groove of the first upper supporting means 131a, and the upper end of the second heat exchange plate 120 is inserted into the groove of the second upper supporting means 131b. In addition, the contact surfaces of the supporting

means

131a and 131b are welded. The first lower supporting means 132a and 132b are respectively inserted and welded to the grooves in the same manner as the above. Next, the upper inlet joining portion 141a is fit to the through hole of the lower edge of the first heat exchange plate 110, and the lower inlet joining portion 141b is fit to the through hole of the lower edge of the second heat exchange plate 120. In this instance, the contact surfaces between the flanges of the

inlet joining portions

141a and 141b and the

heat exchange plates

110 and 120 are fixed by welding. In the same way, the upper and lower

outlet joining portions

151a and 151b are also respectively fit and welded to the through holes of the upper edges of the first and second

heat exchange plates

110 and 120. Finally, the first sealing means 143 is fit into the recess formed in the inlet joining portion, and the second sealing means 153 is fit into the recess formed in the outlet joining portion 151, so that the heat exchange cell 100 is completed.

Next, in the heat exchange cell laminating step, the heat exchange cells 100 are laminated inside the cell receiving part 210 as shown in FIG. 2. In detail, the upper supporting means of the heat exchange cell 100 is fit between the upper guide means 241 and the lower supporting means is fit between the lower guide means 242, so that the heat exchange cells 100 are laminated on the bottom surface of the cell receiving part 210 in parallel. So, the heat exchange cells 100 are aligned and laminated by the guide means 240 without welding, and the plural inlet joining portions 141 are closely connected by the first sealing means 143, so that the flow passage of the first fluid 10 is formed. Likewise, the plural outlet joining portions 151 are closely connected by the second sealing means 153, so that the flow passage of the second fluid 20 is formed. Moreover, while the heat exchange cells 100 are laminated, the first primary surface part 111 and the second primary surface part 121 meet together to thereby form the flow passage of the second fluid 20.

Finally, in the sealing step, the cover part 220 is covered on the cell receiving part 210 in which a plurality of the heat exchange cells 100 are laminated. In this instance, the cover part 220 is covered in such a fashion that the first fluid supply part 330 is communicated with the first fluid inlet part 140 and the first fluid discharge part 340 is communicated with the first fluid outlet part 150. After that, the cover part 220 and the cell receiving part 210 are joined and sealed by means of the fastening means 230. For instance, the bolts are inserted into the through holes formed in the cover part 220 and the flange part 211 and the nuts are fastened.

FIG. 7 is a view showing an operational state of the disassemblable and washable primary surface heat exchanger according to the present invention. Referring to FIG. 7, the operational state of the disassemblable and washable primary surface heat exchanger according to the present invention will be described.

First, the first fluid 10 and the second fluid 20 which are different from each other in temperature are supplied to carry out heat exchange. The first fluid 10 is supplied to the first fluid supply part 330, and the second fluid 20 is supplied to the second fluid supply part 310. The first fluid 10 flows into the first fluid flow passage formed inside the heat exchange cell 100 while passing through the tube of the inlet joining portion 141. The second fluid 20 flows into the second fluid flow passage formed between the heat exchange cell 100 and the heat exchange cell 100. The first fluid 10 and the second fluid 20 carry out heat exchange in a thermal transfer manner through the first and second

primary surface parts

111 and 121 while flowing oppositely. Furthermore, according to the uneven shape of the first primary surface part 111 and the second primary surface part 121, the first fluid 10 and the second fluid 20 flow while forming an eddy to thereby carry out heat exchange by a convection current. After the heat exchange, the first fluid 10 is discharged to the first fluid discharge part 340 after passing through the tube of the outlet joining portion 151. After the heat exchange, the second fluid 20 is discharged out through the second fluid discharge part 320.

During the heat exchange, foreign matters are stained on the flow passages and the flow passages become narrower, so that the heat exchange efficiency is deteriorated and durability becomes worse. However, in the case of the primary surface heat exchanger according to the present invention, the cell receiving part 210 and the cover part 220 can be disassembled so that the inside of the heat exchanger is opened. Additionally, because the heat exchange cells 100 are separated from each other, the primary surface parts can be washed, so that the primary surface heat exchanger according to the present invention is easy and economical in maintenance and repair.

As described above, while the present invention has been particularly shown and described with reference to the example embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without changing the technical idea or essential characteristics of the present invention as defined by the following claims. Therefore, it would be understood that the above embodiments of the present invention are all exemplified and the present invention is not restricted to the above embodiments. Accordingly, it should be understood that there is no intent to limit example embodiments of the invention to the particular forms disclosed, but on the contrary, example embodiments of the invention are to cover all modifications, equivalents, and alternatives falling within the scope of the invention without departing from the spirit and scope of the present invention as defined by the following claims.

The present invention can be utilized to disassemblable and washable primary surface heat exchangers. In detail, the disassemblable and washable primary surface heat exchanger is easily maintained and repaired and provides economic feasibility and thermal efficiency because a plurality of the heat exchange cells are disassemblably mounted inside the openable housing and respectively have the primary surface plates.

1: disassemblable and washable primary surface heat exchanger

10, 20: first and second fluid

100: heat exchange cell

110, 120: first and second heat exchange plate

111, 121: first and second primary surface part

130: supporting means

131a, 131b: first and second upper supporting means

132a, 132b: first and second lower supporting means

140: first fluid inlet part

141: inlet joining portion

141a, 141b: upper and lower inlet joining portion

143: first sealing means

150: first fluid outlet part

151: outlet joining portion

151a, 151b: upper and lower outlet joining portion

153: second sealing means

210: cell receiving part

211: flange portion

220: cover part

230: fastening means

240: guide means

241, 242: upper and lower guide means

310: second fluid supply part

320: second fluid discharge part

330: first fluid supply part

340: first fluid discharge part

Claims

A disassemblable and washable primary surface heat exchanger comprising:

heat exchange cells (100), each of the heat exchange cells (100) including: a first heat exchange plate (110) having a first primary surface part (111) which has an uneven surface formed partially or entirely;

a second heat exchange plate (120) having a second primary surface part (121) which has an uneven surface formed partially or entirely so as to form a flow passage of a first fluid (10) by getting in contact with one side of the first primary surface part (111); and

supporting means (130) for connecting and supporting at least one side of the first heat exchange plate (110) and the second heat exchange plate (120); and

a housing disassemblably accommodating the heat exchange cells (100) laminated in such a way as to form a flow passage of a second fluid (20), which flows in the opposite direction to the first fluid (10), the housing being opened in at least one side to allow a user to wash the heat exchange cells (100).
The disassemblable and washable primary surface heat exchanger according to claim 1, wherein the uneven surfaces of the first and second primary surface parts (111, 121) are formed on flat surfaces of the first and second primary surface parts (111,121) in a wave form.
The disassemblable and washable primary surface heat exchanger according to claim 1, wherein the first and second primary surface parts (111, 121) are formed in a polygonal shape or in a circular shape.
The disassemblable and washable primary surface heat exchanger according to claim 1, wherein the uneven surfaces of the first and second primary surface parts (111, 121) contain the middle portions of the first and second heat exchange plates (110, 120).
The disassemblable and washable primary surface heat exchanger according to claim 1, wherein each of the heat exchange cells (100) comprises:

a first fluid inlet part (140) formed adjacent to an edge of one side in such a way as to communicate with the first fluid flow passage; and

a first fluid outlet part (150) formed adjacent to an edge of the other side in such a way as to communicate with the first fluid flow passage.
The disassemblable and washable primary surface heat exchanger according to claim 5, wherein the first fluid inlet part (140) comprises inlet joining portions (141) which respectively have a specific height (L) and are hollow so as to get in contact with each other when the cells (100) are laminated to thereby form an inflow passage of the first fluid (10), and

wherein the first fluid outlet part (150) comprises outlet joining portions (151) which respectively have a specific height (L) and are hollow so as to get in contact with each other when the cells (100) are laminated to thereby form an outflow passage of the first fluid (10).
The disassemblable and washable primary surface heat exchanger according to claim 6, wherein at least a portion of the inlet joining portion (141) and the outlet joining portion (151) is opened toward the first fluid flow passage.
The disassemblable and washable primary surface heat exchanger according to claim 6, wherein the first fluid inlet part (140) further comprises a first sealing means (143) mounted on at least one side of the inlet joining portions (141) so that the inlet joining portions (141) get closer and get in contact with each other, and the first fluid outlet part (150) further comprises a second sealing means (153) mounted on at least one side of the outlet joining portions (151) so that the outlet joining portions (151) get closer and get in contact with each other.
The disassemblable and washable primary surface heat exchanger according to claim 5, wherein the first fluid inlet part (140) and the first fluid outlet part (150) are opposed to each other relative to the first and second primary surface parts (111, 121).
The disassemblable and washable primary surface heat exchanger according to claim 1, further comprising:

a first fluid supply part (330) mounted at one side of the housing to supply the first fluid (10) to the first fluid flow passage;

a first fluid discharge part (340) mounted at one side or the other side of the housing to discharge the first fluid (10) passing through the flow passage;

a second fluid supply part (310) mounted at a side of the housing to supply the second fluid (20) to the second fluid flow passage and to let the second fluid (20) flow in the opposite direction to the first fluid (10); and

a second fluid discharge part (320) mounted at a side of the housing to discharge the second fluid (20) passing through the flow passage, the second fluid discharge part (320) being located at the opposite side of the second fluid supply part (310).
The disassemblable and washable primary surface heat exchanger according to claim 10, wherein the heat exchange cells (100) are laminated parallel to the side of the housing where first fluid supply part (330) and the first fluid discharge part (340) are mounted but is laminated perpendicularly to the side of the housing where the second fluid supply part (310) and the second fluid discharge part (320) are mounted.
The disassemblable and washable primary surface heat exchanger according to claim 1, wherein the housing further comprises guide means (240) for guiding at least a portion of the heat exchange cells (100) so that both ends of the supporting means (130) are aligned well when the plural heat exchange cells (100) are laminated.
The disassemblable and washable primary surface heat exchanger according to claim 12, wherein the guide means (240) are spaced apart from each other so as to respectively guide one end of the support means (130) and the other end of the support means (130), and are arranged perpendicularly to the laminated plane of the heat exchange cells (100).
The disassemblable and washable primary surface heat exchanger according to claim 12, wherein the guide means (240) are formed on the side of the inner wall of the housing which is in contact with the support means (130).
The disassemblable and washable primary surface heat exchanger according to claim 1, wherein the housing comprises:

a cell receiving part (210) opened at one side and adapted for receiving the heat exchange cells (100) which are laminated;

a cover part (220) adapted for sealing the opened side of the cell receiving part (210); and

fastening means (230) for connecting the cell receiving part (210) and the cover part (220) in such a fashion that they are opened and closed.