KR102115918B1 - Plate type heat exchanger - Google Patents

Abstract

The present invention relates to a plate heat exchanger.
In the plate heat exchanger according to the embodiment of the present invention, a plurality of heat exchange plates are stacked. The heat exchange plate includes a plate portion provided around the water outlet port and joined to an adjacent heat exchange plate. In addition, the heat exchange plate further includes a guide protrusion provided to protrude from the flat portion, and the guide protrusion generates rotational flow of water discharged to the water outlet port, thereby preventing freezing due to stagnation of water.

Description

Plate type heat exchanger

The present invention relates to a plate heat exchanger.

A heat exchanger is a device that guides heat exchange between at least two fluids, and may include, for example, a plate heat exchanger. The plate heat exchanger is composed of a plurality of heat exchange plates stacked, and between the stacked plurality of heat exchange plates, two or more flow paths through which fluids forming different temperatures flow, i.e., a first flow path through which the first fluid flows And a second flow path through which the second fluid flows.

The first and second flow paths may be alternately arranged to exchange heat. In one example, the first fluid may be composed of a refrigerant, and the second fluid may be composed of water. The plate-type heat exchanger has an advantage of high heat exchange efficiency compared to other heat exchangers, and its structure can be reduced in size and weight.

The plate heat exchanger includes a refrigerant inlet through which refrigerant flows and a refrigerant outlet through which heat exchanged refrigerant is discharged. The refrigerant introduced through the refrigerant inlet may be distributed to the first flow path and flow into a space between each plate. In addition, the refrigerant in the first flow path may be discharged to the outside through the refrigerant outlet. In each heat exchange plate, a refrigerant inlet port and a refrigerant outlet port respectively communicating with the refrigerant inlet and the refrigerant outlet may be formed.

The plate heat exchanger includes a water inlet through which water flows and a water outlet through which heat-exchanged water is discharged. Water introduced through the water inlet may be distributed to the second flow path and flow into a space between each plate. And, the water in the second flow path can be discharged to the outside through the water outlet. A water inlet port and a water outlet port respectively communicating with the water inlet and the water outlet may be formed in each heat exchange plate.

On the other hand, when the plate-type heat exchanger is used as an evaporator, low temperature refrigerant and high temperature water are exchanged, and in this process, water may be cooled. And, in order to improve heat exchange efficiency, the refrigerant inlet port and the refrigerant outlet port may be arranged in a diagonal direction of the heat exchange plate, and the water inlet port and the water outlet port may be arranged in another diagonal direction of the heat exchange plate.

By this arrangement, the refrigerant inlet port and the water outlet port can be arranged adjacent to each other. In this case, a phenomenon in which the refrigerant flowing into the refrigerant inlet port by forming a relatively low temperature freezes water flowing through the water outlet port appears. In particular, water may freeze in the portion around the water outlet port where the water flow is weak.

According to this phenomenon, in a narrow flow path between a plurality of heat exchange plates stacked and coupled, a problem arises in that the volume of frozen water increases and the heat exchanger is damaged.

In connection with such a plate heat exchanger, the following prior art is introduced.

1. Japanese registered patent number (date of registration): Japanese patent 4856170 (November 4, 2011)

2. Name of invention: Plate heat exchanger

In order to solve this problem, the present invention aims to provide a plate heat exchanger provided with a structure for forming a flow path of water around the water outlet port.

In addition, an object of the present invention is to provide a plate heat exchanger by providing guide protrusions protruding from a flat portion where two adjacent heat exchange plates are joined, so that the main flow of water toward the water outlet port can rotate along the guide protrusions.

In addition, it is an object of the present invention to provide a plate heat exchanger capable of more easily forming the rotational flow of water by allowing the center of the water outlet port and the center of the guide protrusion to be arranged to be staggered (not overlapping) with respect to the vertical direction. .

Particularly, according to the shape or arrangement of the lamination guide provided around the water outlet port, when the main flow flowing into the water outlet port is toward the left with respect to the center line of the water outlet port, the guide projection is based on the center line. The object of the present invention is to provide a plate heat exchanger, which is disposed on the right side to easily form the rotational flow of the water.

On the other hand, when the main flow flowing into the water outlet port is directed to the right with respect to the center line of the water outlet port, the guide protrusion is disposed on the left side with respect to the center line to facilitate rotational flow of the water, It is an object to provide a plate heat exchanger.

In the plate heat exchanger according to the embodiment of the present invention, a plurality of heat exchange plates are stacked.

The heat exchange plate includes a plate portion provided around the water outlet port and joined to an adjacent heat exchange plate.

The heat exchange plate further includes a guide protrusion provided to protrude on the flat plate portion, and the guide protrusion generates rotational flow of water discharged to the water outlet port, thereby preventing freezing due to stagnation of water.

The heat exchange plate may further include a jaw that forms an edge of the flat plate portion and is provided to protrude from the flat plate portion, thereby guiding rotational flow of water.

The water inlet port may be provided on the upper portion of the plate body, and the water outlet port may be provided on the lower portion of the plate body.

The guide protrusion may be disposed under the water outlet port.

The center (C1) of the water outlet port and the centers (C2, C3) of the guide protrusion may be formed at eccentric positions based on the vertical direction.

The first extension line (L1) passing the center (C1) of the water outlet port in the vertical direction and the second extension line (L2, L3) passing the centers (C2, C3) of the guide protrusion in the vertical direction are set by the set separation distance. Spaced apart.

The second extension lines L2 and L3 may be located on the left or right side of the first extension line L1.

The plate body further includes protrusions and depressions that are alternately arranged.

The plate body further includes a lamination guide extending in the radial direction of the water outlet port from the protrusion or the depression.

The lamination guide may be disposed outside the water outlet port.

The lamination guide may include a plurality of lamination guides arranged in a circumferential direction along the circumference of the water outlet port.

The guide projection may have a cylindrical or polyhedral shape.

The plate body may further include a refrigerant inlet port and a refrigerant outlet port, and the refrigerant inlet port and the water outlet port may be disposed under the plate body.

The water inlet port and the refrigerant outlet port may be disposed above the plate body.

The water inlet port and the water outlet port may be arranged in a diagonal direction of the plate body, and the refrigerant inlet port and the refrigerant outlet port may be arranged in another diagonal direction of the plate body.

According to the present invention according to the above-described solution, a structure for forming a water flow path around the water outlet port is provided, thereby preventing rotation of water and stagnation of water around the water outlet port. .

In detail, by providing a guide protrusion protruding from a flat plate portion to which two adjacent heat exchange plates are joined, the main flow of water toward the water outlet port can be easily rotated along the guide protrusion.

In addition, the center of the water outlet port and the center of the guide protrusion are arranged to be staggered (not overlapped) with respect to the vertical direction, so that the main flow of water flowing into the water outlet port is easily rotated along the circumference of the guide protrusion. Can be.

Particularly, when the main flow flowing into the water outlet port is directed to the left with respect to the center line of the water outlet port by the lamination guide provided around the water outlet port, the guide protrusion is disposed on the right side with respect to the center line. Thus, the rotational flow of the water can be easily formed.

In another embodiment, when the main flow flowing into the water outlet port faces the right side with respect to the center line of the water outlet port, the guide protrusion is disposed on the left side with respect to the center line to facilitate rotational flow of the water. Can be.

1 is a perspective view showing the configuration of a plate heat exchanger according to a first embodiment of the present invention.
2 is a view showing the configuration of a heat exchange plate constituting a plate-type heat exchanger according to the first embodiment of the present invention.
3 is an exploded perspective view showing the configuration of two adjacent heat exchange plates according to the first embodiment of the present invention.
4 is a cross-sectional view showing the configuration of the plate package P according to the first embodiment of the present invention.
5 is a view showing the peripheral configuration of the second outlet port of the heat exchange plate according to the first embodiment of the present invention.
6 is a view showing water flow around the second outlet port according to the first embodiment of the present invention.
7 is a view showing a state of the second flow path (W1, water flow path) formed in the heat exchange plate according to the first embodiment of the present invention.
8 is a view showing the peripheral configuration of the second outlet port of the heat exchange plate according to the second embodiment of the present invention.
9 is a view showing water flow around the second outlet port according to the second embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art to understand the spirit of the present invention may easily propose other embodiments within the scope of the same spirit.

1 is a perspective view showing a configuration of a plate heat exchanger according to a first embodiment of the present invention, and FIG. 2 is a diagram showing a configuration of a heat exchange plate constituting a plate heat exchanger according to a first embodiment of the present invention.

First, referring to FIG. 1, in the plate heat exchanger 10 according to the first embodiment of the present invention, the plate package P including a plurality of heat exchange plates 100 and both sides of the plate package P Two end plates 20 and 30 are provided. For example, the heat exchange plate 100 and the two end plates 20 and 30 may have a quadrangular panel shape.

The heat exchange plate 100 may be formed of a metal material having excellent thermal conductivity and excellent pressure resistance against pressure. For example, the heat exchange plate 100 may be made of stainless steel.

The plurality of heat exchange plates 100 may be arranged to be stacked in the front-rear direction (based on FIG. 1, vertical direction). The front-rear direction may be referred to as a "stacking direction".

Between the plurality of heat exchange plates 100, a flow path through which a fluid flows is formed. The flow path includes a first flow path through which the first fluid flows and a second flow path through which the second fluid flows. The first and second flow paths may be alternately arranged in sequence.

The two end plates 20 and 30 include a first end plate 20 provided in front of the plate package P and a second end plate 30 provided in the rear of the plate package P. Is included. That is, between the two end plates 20 and 30, the plate package P may be installed.

In the plate heat exchanger (10), a first inlet (61) to allow a first fluid to flow into the plate package (P) and a second fluid to flow into the plate package (P) 2 the inlet 71 is further included. The first inlet 61 and the second inlet 71 may be coupled to the first end plate 20. The first and second fluids have a temperature difference and may exchange heat with each other. In one example, the first fluid is a refrigerant, and the second fluid can be water. Accordingly, the first inlet 61 may be referred to as a refrigerant inlet and the second inlet 71 as a water inlet.

When the plate heat exchanger 10 acts as an evaporator, heat exchange between low temperature refrigerant and high temperature water may be performed, and water may be cooled by the refrigerant.

In the plate heat exchanger 10, a first outlet portion 65 for allowing a first fluid to be discharged from the plate package P and a second outlet portion for allowing a second fluid to be discharged from the plate package P) 75) is further included. The first outlet portion 65 and the second outlet portion 75 may be coupled to the first end plate 20.

For example, in the installation form of the plate heat exchanger 10, the first inlet 61 and the second outlet 75 are located under the plate heat exchanger 10, the first outlet ( 65) and the second inlet 71 may be located above the plate heat exchanger 10.

In detail, the first inlet portion 61 and the first outlet portion 65 may be disposed on the first and fourth corner sides arranged diagonally among the four corners of the end plate 20. In addition, the first inlet 61 may be located at the bottom of the first end plate 20, and the first outlet 65 may be located at the top of the first end plate 20.

The second inlet portion 71 and the second outlet portion 75 may be disposed on second and third edge sides arranged in different diagonal directions among the four corners of the end plate 20. In addition, the second inlet portion 71 may be positioned above the first end plate 20, and the second outlet portion 75 may be positioned below the first end plate 20.

In other words, the first inlet portion 61 and the second outlet portion 75 are disposed on both lower sides of the first end plate 20, and the first outlet portion 65 and the second inlet portion 71 ) May be disposed on both lower sides of the first end plate 20. With this configuration, the refrigerant flows diagonally from the first inlet 61 toward the first outlet 65, and water flows from the second inlet 71 to the second outlet 75 ) Can flow diagonally. Therefore, the heat exchange area between the water and the refrigerant is increased, so that the heat exchange efficiency can be improved.

Next, referring to FIG. 2, the heat exchange plate 100 according to an embodiment of the present invention includes a plate body 110 having a shape of a quadrangular panel and an edge portion surrounding the outside of the plate body 110 ( 120).

The heat exchange plate 110 is arranged at four corners of the plate body 110 and communicates with the first and second inlet parts 61 and 71 and the first and second outlet parts 65 and 75 to generate fluid. A number of inlet and outlet ports 130, 135, 140 and 145 to guide the flow are included. The plurality of entry / exit ports 130, 135, 140, and 145 may be formed through at least a portion of the plate body 110.

The plurality of inlet and outlet ports (130,135,140,145) is formed at a position corresponding to the first inlet 61 and a first inlet port 130 and a first outlet 65 through which a first fluid (refrigerant) is introduced. It is formed at a corresponding position and includes a first outlet port 135 through which the first fluid is discharged. For example, the first inlet port 130 and the first outlet port 135 may have a circular shape. The first inlet port 130 may be referred to as a "refrigerant inlet port" and the first outlet port 135 may be referred to as a "refrigerant outlet port".

The refrigerant flows into the refrigerant flow path of the plate package P in the process of flowing to the rear of the heat exchange plate 100 through the first inlet port 130, and the refrigerant heat-exchanged in the refrigerant flow path is the first It is discharged from the plate package (P) through the outlet port (135) and may flow forward toward the first outlet (65).

The plurality of inlet and outlet ports (130,135,140,145) is formed at a position corresponding to the second inlet portion (71) and a second inlet port (140) and a second outlet portion (75) through which a second fluid (water) flows. It is formed in a corresponding position and includes a second outlet port 145 through which the second fluid is discharged. For example, the second inlet port 140 and the second outlet port 145 may have a circular shape. The second inlet port 140 may be referred to as a “water inlet port” and the second outlet port 145 may be referred to as a “water outlet port”.

Water flows into the water passage of the plate package P in the process of flowing to the rear of the heat exchange plate 100 through the second inlet port 140, and the heat exchanged in the water passage is the second It is discharged from the plate package (P) through the outlet port (145) and may flow forward toward the second outlet (75).

The front surface of the plate body 110 includes irregularities. In detail, the unevenness includes a protrusion 112 protruding forward from the front surface of the plate body 110 and a depression 114 recessed rearward from the front surface of the plate body 110. A plurality of protrusions 112 and depressions 114 may be provided, and may be alternately arranged. In addition, the unevenness may be included in the rear surface of the plate body 110.

For example, a herringbone structure may be formed on front and rear surfaces of the plate body 110 by the plurality of protrusions 112 and the plurality of depressions 114.

The unevenness of the plate body 110 may be provided to contact the unevenness provided in another adjacent heat exchange plate 100. Then, the concave-convex contacts can be joined by a predetermined method. As an example, the predetermined method may include an adhesive method by welding or adhesive. For example, a protrusion 112 of the second plate 102 (see FIG. 3) may be attached to the depression 114 of the first plate 101 (see FIG. 3).

Figure 3 is an exploded perspective view showing the configuration of two adjacent heat exchange plates according to the first embodiment of the present invention, Figure 4 is a view showing the peripheral configuration of the second outlet port of the heat exchange plate according to the first embodiment of the present invention 5 is a view showing water flow around the second outlet port according to the first embodiment of the present invention.

3 to 5, the plurality of heat exchange plates 100 according to the first embodiment of the present invention include the first plate 101 and the second plate 102 stacked in the front-rear direction. The second plate 102 may be coupled or bonded to the front of the first plate 101.

Although not shown in FIG. 3, a heat exchange plate having the same configuration as the first plate 101 is disposed in front of the second plate 102, and the same configuration as the second plate 102 is disposed in front of the second plate 102. Branches may be arranged heat exchange plates. In this way, multiple heat exchange plates can be aligned.

The second plate 102 may have a shape in which the first plate 101 is turned upside down. That is, the first and second plates 101 and 102 may have an inverted shape in the front-rear direction based on the interface where the first and second plates 101 and 102 are coupled. For example, the protrusion 112 provided on the first plate 101 may be configured to be coupled to the depression 114 provided on the second plate 102.

In addition, a second flow path W1 (water flow path) through which water flows may be formed in a space between the protrusion 112 of the first plate 101 and the depression 114 of the second plate 102. Can be. Referring to FIG. 4, in the plurality of heat exchange plates, a plurality of plates other than the first and second plates 101 and 102 are arranged in the front-rear direction, and between two adjacent plates among the plurality of plates, the second flow path Can be formed. That is, water introduced into the plate heat exchanger 10 through the second inlet 171 is distributed at the second inlet port 140 to flow a second flow path formed between each plate.

In addition, the second flow path extends diagonally from the second inlet port 140 toward the second outlet port 145, and the water in the second flow path is laminated at the second outlet port 145 and is second. It can flow to the outlet 175 (see Figure 7).

The first and second plates 101 and 102 include a second outlet port formed through the one side of the plate body 110 and passing through the heat-exchanged water. The second outlet port includes a second outlet port 145a formed on the first plate 101 and a second outlet port 145b formed on the second plate 102. The two second outlet ports 145a and 145b may be aligned in the front-rear direction.

The first plate 101 includes a flat plate portion 115a disposed around the second outlet port 145a and having a flat surface. In other words, it can be understood that the second outlet port 145a is formed on the flat plate portion 115a. The flat plate portion 115a may form a joint portion that is joined to the flat plate portion 115b of the second plate 102.

The second plate 102 includes a flat plate portion 115b disposed around the second outlet port 145b and having a flat surface. In other words, it may be understood that the second outlet port 145b is formed on the flat plate portion 115b. The flat plate portion 115b may be joined to the flat plate portion 115a of the first plate 101. The flat plate portion 115a may be referred to as a “first flat plate portion” and the flat plate portion 115b may be referred to as a “second flat plate portion”.

The first and second plates 101 and 102 include joints 118a and 118b that are joined to each other. The joining portions 118a and 118b are provided on the first plate 101 and are provided on the joining portion 118a and the second plate 102 disposed outside the flat plate portion 115a and the flat plate portion 115b. ) Includes a joint 118b disposed outside.

The joining portion 118a may be configured to be recessed downward from the plate body 110 of the first plate 101. In addition, the plate body 110 of the first plate 101 may be provided with a jaw 117a extending downward from the plate body 110 to realize the depressed shape of the joint 118a. . The jaw 117a forms an edge of the flat plate portion 115a, and may be disposed to surround both sides of the guide protrusion 200a. The jaw 117a may form a boundary of a space through which water discharged to the second outlet port 145a can flow.

The joining portion 118b may be configured to protrude upward from the plate body 110 of the second plate 102. In addition, the plate body 110 of the second plate 102 may be provided with a jaw 117b extending upward from the plate body 110 to implement a protruding shape of the joint 118b. .

The joining portions 118a and 118b may be in surface contact with each other. In addition, the flat plate portions 115a and 115b may be joined to each other. Since the joining portions 118a and 118b are joined to each other, the flat portions 115a and 115b may be referred to as a “first flat plate portion” and the joining portions 118a and 118b may be referred to as a “second flat plate portion”.

The heat exchange plate 100 includes guide protrusions 200a and 200b that guide rotational flow with respect to water discharged to the second outlet port 145. The guide protrusions 200a and 200b include a guide protrusion 200a provided on the first plate 101 and a guide protrusion 200b provided on the second plate 102.

The guide protrusion 200a or the guide protrusion 200b may have a substantially cylindrical or polyhedral shape.

The guide projection 200a of the first plate 101 is configured to protrude forward from the flat plate portion 115a, and the guide projection 200b of the second plate 102 is rearward from the flat plate portion 115b. It can be configured to dent. The front surface of the guide protrusion 200a of the first plate 101 may be configured to be joined to the rear surface of the guide protrusion 200b of the second plate 102. That is, the guide protrusion 200a and the guide protrusion 200b are joined to each other to guide rotational flow of water discharged to the second outlet port 145.

The heat exchange plate 100 includes lamination guides 112a and 112b that collect water flowing along the surface of the plate body 110 and discharge it to the second outlet port 145. In detail, the lamination guides 112a and 112b include a lamination guide 112a provided on the first plate 101 and a lamination guide 112b provided on the second plate 102.

The lamination guide 112a is a part of the herringbone structure of the first plate 101 and may extend from the protrusion 112 or the depression 114 provided in the first plate 101. In addition, the lamination guide 112b is a part of the herringbone structure of the second plate 102, and may extend from the protrusion 112 or the depression 114 provided in the second plate 102.

The lamination guide 112a of the first plate 101 may be coupled to the rear side of the lamination guide 112b of the second plate 102.

The lamination guide 112a is disposed along the circumference of the second outlet port 145a of the first plate 101 and may extend radially toward the center C1 of the second outlet port 145a. have. In addition, the lamination guide 112b is disposed along the circumference of the second outlet port 145b of the second plate 102 and may extend radially toward the center of the second outlet port 145b. (See Figure 5).

5 is a view showing the peripheral configuration of the second outlet port of the heat exchange plate according to the first embodiment of the present invention, Figure 6 shows the flow of water around the second outlet port according to the first embodiment of the present invention 7 is a view showing the state of the second flow path (W1, water flow path) formed in the heat exchange plate according to the first embodiment of the present invention.

5 to 7, the second outlet port 145a of the first plate 101 according to the first embodiment of the present invention may have a substantially circular shape. On the outer side of the second outlet port 145a, a lamination guide 112a for collecting and sending refrigerant flowing along the surface of the first plate 101 to the second outlet port 145a is provided. The lamination guide 112a may be disposed above the second outlet port 145a.

A plurality of the lamination guides 112a are provided, and a plurality of lamination guides 112a may be arranged in a circumferential direction from the outside of the second outlet port 145a. Further, each lamination guide 112a may extend in the radial direction of the second outlet port 145a.

A guide protrusion 200a for guiding rotational flow of water discharged toward the second outlet port 145a through the plurality of lamination guides 112a may be provided outside the second outlet port 145a. have. The guide protrusion 200a may be disposed under the second outlet port 145a. That is, based on the center C1 of the second outlet port 145a, the plurality of lamination guides 112a and the guide protrusions 200a may be disposed on opposite sides of each other.

The first extension line (L1) passing the center (C1) of the second outlet port (145a) in the vertical direction and the second extension line (L2) passing the center (C2) of the guide protrusion (200a) in the vertical direction are It may be spaced apart by one separation distance (S1).

That is, the center (C1) of the second outlet port (145a) and the center (C2) of the guide projection (200a) are positioned to be eccentric with respect to the vertical direction. As an example, the second extension line L2 may be disposed on the left side of the first extension line L1.

According to this configuration, the water flowing in the radial direction from the plurality of lamination guides 112a toward the center C1 of the second outlet port 145a is rotated along the circumference of the guide protrusion 200a. Can occur. Therefore, it prevents water from stagnating in the vicinity of the second outlet port 145a, particularly in the lower portion of the second outlet port 145a, and prevents the phenomenon of freezing by cold refrigerant in the first inlet port 130. Can be prevented.

In detail, referring to FIG. 6, the water flowing along the second flow path W1 formed by the protrusion 112 and the depression 114 provided in the plate body 110 passes through a plurality of lamination guides 112a. Collected, the collected water can be discharged toward the center (C1) of the second outlet port (145a).

At this time, the main flow fm of the water discharged toward the center C1 of the second outlet port 145a according to the shape or arrangement of the protrusion 112 and the depression 114 is the first extension line l1 ) May be directed to the center C1 on the left side, or may be directed to the center C1 on the right side of the first extension line 1.

For example, in this embodiment, as shown in FIG. 6, the main flow fm may face the center C1 from the left side of the first extension line l1. The main flow fm may flow to the right side of the first extension line 1 through the center C1.

The water flowing to the right side of the first extension line (L1) forms a flow that rotates clockwise along the circumference of the guide protrusion (200a) while striking the jaw (117a). Therefore, the phenomenon that water stagnates around the guide protrusion 200a is prevented, and the phenomenon that the stagnant water is frozen by a cool refrigerant can be prevented.

Referring to FIGS. 1, 4 and 7 together, water introduced through the second inlet 71 flows backward, and is disposed through the second inlet ports 140 aligned up and down of the plate package P. 2 may be introduced into the flow path (W1). The second flow path W1 may be defined as a space between two stacked heat exchange plates 100 and an inner space of the protrusion 112 and the depression 114 joined together. The second flow path W1 is formed by being distributed between a plurality of adjacent two heat exchange plates 100 and may be aligned in the front-rear direction.

The refrigerant in the second flow path W1 may be exchanged with water in the adjacent first flow path R1. The first flow path R1 may be defined as a space between two heat exchange plates 100 of another combination, and may be defined as an inner space of the protrusion 112 and the depression 114 joined together.

Meanwhile, water introduced into the second flow path W1 may flow diagonally toward the second outlet port 145 in the diagonal direction of the heat exchange plate 100.

The second outlet port 145 is formed by passing at least a portion of the heat exchange plate 100. In addition, a lamination guide 112 for collecting water from the second flow path W1 and discharging it to the second outlet port 135 may be provided on the circumferential side of the second outlet port 145.

As described above, the plurality of lamination guides 112 may extend radially from the outside of the second outlet port 145 toward the center C1 of the second outlet port 145.

In a state in which a plurality of heat exchange plates 100 are stacked in the front-rear direction, the second outlet ports 145 of each heat exchange plate 100 may be aligned in the front-rear direction. The refrigerant discharged to the second outlet port 145 of each heat exchange plate 100 is laminated to each other, and the combined refrigerant may be discharged from the plate heat exchanger 10 through the second outlet portion 75.

Hereinafter, a second embodiment of the present invention will be described. Since this embodiment has a difference in the arrangement of the guide projections compared to the first embodiment, the differences are mainly described, and the same parts as the first embodiment are described with reference to the first embodiment and reference numerals.

8 is a view showing the configuration of the second outlet port of the heat exchange plate according to the second embodiment of the present invention, Figure 9 is a view showing the flow of water around the second outlet port according to the second embodiment of the present invention It is a drawing.

8 and 9, in the heat exchange plate 100 according to the second embodiment of the present invention, the rotation of water discharged to the second outlet port 145a is disposed outside the second outlet port 145a. A guide protrusion 200a 'for guiding the flow is included. Based on the center C1 of the second outlet port 145a, a plurality of lamination guides 112a and the guide protrusions 200a may be disposed on opposite sides of each other.

The center (C1) of the second outlet port (145a) and the center (C2) of the guide projection (200a ') are positioned to be eccentric with respect to the vertical direction. In detail, the first extension line (L1) passing the center (C1) of the second outlet port (145a) in the vertical direction and the second extension line (L3) passing the center (C3) of the guide projection (200a ') in the vertical direction ) May be spaced apart by the first separation distance S2.

That is, the center (C1) of the second outlet port (145a) and the center (C3) of the guide projection (200a ') are positioned to be eccentric with respect to the vertical direction. For example, the second extension line L3 may be disposed on the right side of the first extension line L1.

According to this configuration, the water flowing in the radial direction from the plurality of lamination guides 112a toward the center C1 of the second outlet port 145a rotates along the circumference of the guide protrusion 200a '. This can happen. Therefore, it prevents water from stagnating in the vicinity of the second outlet port 145a, particularly in the lower portion of the second outlet port 145a, and prevents the phenomenon of freezing by cold refrigerant in the first inlet port 130. Can be prevented.

In detail, referring to FIG. 9, the water flowing along the second flow path W1 formed by the protrusion 112 and the depression 114 provided in the plate body 110 passes through a plurality of lamination guides 112a. Collected, the collected water can be discharged toward the center (C1) of the second outlet port (145a).

At this time, the main flow fm 'of the water discharged toward the center C1 of the second outlet port 145a according to the shape or arrangement of the protrusion 112 and the depression 114 is the first extension line ( On the right side of ℓ1), the center C1 may be directed. In addition, the main flow fm may flow to the left side of the first extension line 1 through the center C1.

The water flowing to the left of the first extension line (L1) forms a flow that rotates counterclockwise along the circumference of the guide projection (200a ') while striking the jaw (117a). Therefore, the phenomenon that water stagnates around the guide protrusion 200a 'is prevented, and the phenomenon that the stagnant water is frozen by a cool refrigerant can be prevented.

10: plate heat exchanger 20,30: end plate
61: first inlet 65: first outlet
71: second inlet 75: second outlet
100: heat exchange plate 110: plate body
112a: Lamination guide 117a: Chin
112: protrusion 114: depression
130: first inlet port 135: first outlet port
140: second inlet port 145: second outlet port
200a: guide projection

Claims (13)

An inlet through which water flows;
A plate package which communicates with the inlet part and stacks a plurality of heat exchange plates to form a water passage; And
It is connected to the plate package, and includes an outlet through which water is discharged,
In the heat exchange plate,
A plate body having a water inlet port fluidly connected to the inlet and a water outlet port fluidly connected to the outlet;
A plate portion provided around the water outlet port and joined to an adjacent heat exchange plate; And
It is provided to protrude on the flat plate portion, and includes a guide protrusion for generating rotational flow of water discharged to the water outlet port,
In the plate body,
A plurality of protrusions projecting forward from the front surface of the plate body;
A plurality of depressions recessed rearward from the front side of the plate body; And
It includes a lamination guide extending in one direction from the protrusion or the depression relative to the center (C1) of the water outlet port,
The protrusions and depressions are alternately arranged to form a flow path so that water flows,
The guide projection,
Based on the center (C1) of the water outlet port, the water outlet port is spaced apart from the opposite side of the lamination guide, and the center (C1) of the water outlet port and the center (C2, C3) of the guide projection are A plate heat exchanger formed at an eccentric position with respect to the vertical direction toward the center (C1) of the water outlet port from the lamination guide. According to claim 1,
A plate heat exchanger forming a rim of the flat plate portion and further including a jaw provided to protrude from the flat plate portion. According to claim 2,
The chin is provided on both sides of the guide projection, a plate-type heat exchanger to guide the rotational flow of the water. According to claim 1,
The water inlet port is provided on the top of the plate body, and the water outlet port is provided on the bottom of the plate body. delete According to claim 1,
The first extension line (L1) passing the center (C1) of the water outlet port in the vertical direction and the second extension line (L2, L3) passing the centers (C2, C3) of the guide protrusion in the vertical direction are set by the set separation distance. A plate heat exchanger spaced apart. The method of claim 6,
The second extension line (ℓ2, ℓ3) is a plate heat exchanger located on the left or right side of the first extension line (ℓ1). delete According to claim 1,
The lamination guide is a plate heat exchanger disposed outside the water outlet port. According to claim 1,
The lamination guide includes a plate type heat exchanger including a plurality of lamination guides arranged in a circumferential direction along the circumference of the water outlet port. According to claim 1,
The guide projection is a plate-shaped heat exchanger having a cylindrical or polyhedral shape. According to claim 1,
The plate body further includes a refrigerant inlet port and a refrigerant outlet port,
The refrigerant inlet port and the water outlet port are disposed under the plate body,
The water inlet port and the refrigerant outlet port are plate-type heat exchangers disposed on the top of the plate body. The method of claim 12,
The water inlet port and the water outlet port are arranged in a diagonal direction of the plate body,
The refrigerant inlet port and the refrigerant outlet port are plate heat exchangers arranged in different diagonal directions of the plate body.

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