KR102143006B1 - Plate type heat exchanger - Google Patents

Abstract

The present invention relates to a plate heat exchanger.
The plate heat exchanger according to an embodiment of the present invention includes a plate package having an inlet port and stacking a plurality of heat exchange plates to form a refrigerant flow path. The plurality of heat exchange plates include a first header inlet connected to the inlet port and a first header connected to the first header inlet to distribute the refrigerant to the refrigerant passage, and the inlet port. A second plate having a second header inlet in communication and a second header connected to the second header inlet to distribute the refrigerant to the refrigerant flow path is further included.

Description

Plate type heat exchanger

The present invention relates to a plate heat exchanger.

The heat exchanger is a device for guiding heat exchange between at least two fluids, and for example, a plate heat exchanger may be included. The plate-type heat exchanger is configured by stacking a plurality of heat exchange plates, and between the stacked plurality of heat exchange plates, two or more flow paths through which fluids forming different temperatures flow, that is, a first flow path through which a first fluid flows And a second flow path through which the second fluid flows.

The first and second flow paths may be alternately disposed to perform heat exchange. For 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 in that the heat exchange efficiency is higher than that of other heat exchangers, and it is possible to reduce the size and weight of the structure.

The plate heat exchanger includes a refrigerant inlet through which refrigerant is introduced, and the refrigerant introduced through the refrigerant inlet may be distributed to the first flow path and flow into the space between the plates.

Meanwhile, when the plate heat exchanger is used as an evaporator, a low dryness refrigerant, that is, a two-phase refrigerant in a state in which a liquid refrigerant and a gaseous refrigerant are mixed may be introduced into the plate heat exchanger. The liquid refrigerant and the gaseous refrigerant have different specific gravity (density), and in the case of the liquid refrigerant, the inertia force acts relatively large during the flow process. Can appear.

Accordingly, the amount of refrigerant flowing into each plate is not uniformly distributed, and thus a problem in that the heat transfer area of the heat exchange plate cannot be sufficiently utilized may occur.

In addition, a large amount of liquid refrigerant is distributed to one plate space, and a large amount of gaseous refrigerant is distributed to a space between other plates. In the evaporator, since the gaseous refrigerant is a refrigerant that does not require heat exchange, there is a problem that heat exchange performance is deteriorated in a plate space into which the gaseous refrigerant flows.

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

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

2. Title of invention: plate heat exchanger

The present invention has been proposed to solve such a problem, and an object of the present invention is to provide a plate heat exchanger capable of improving heat exchange performance by evenly distributing a refrigerant to a plurality of heat exchange plates.

Another object of the present invention is to provide a plate-type heat exchanger capable of uniformly distributing the amount of refrigerant flowing into each plate by applying a double tube structure to the refrigerant inlet port side of each plate.

In addition, a header having a header inlet is provided around the inlet port of the refrigerant, and the refrigerant introduced into the header through the header inlet can flow to the header of the adjacent plate through the connection port, thereby improving the distribution performance of the refrigerant. An object of the present invention is to provide an improved plate heat exchanger.

In addition, in a stacked structure of adjacent first and second plates, the header inlet portions provided on the first and second plates are arranged so as to be shifted in the front-rear direction, so that the refrigerant introduced into the header inlet can branch and flow. Therefore, an object of the present invention is to provide a plate heat exchanger capable of lowering flow resistance.

Another object of the present invention is to provide a plate-type heat exchanger in which the refrigerant in the header is discharged to a refrigerant flow path through the header outlet and flows to an outlet port of the refrigerant. In addition, a plurality of header outlet portions are provided, so that the refrigerant can be easily discharged from the header.

The plate-type heat exchanger according to an embodiment of the present invention includes a plate package having an inlet port and stacking a plurality of heat exchange plates to form a refrigerant flow path.

The plurality of heat exchange plates includes a first plate provided with a first header inlet part communicating with the inlet port and a first header connected to the first header inlet part to distribute the refrigerant to the refrigerant passage.

The plurality of heat exchange plates further includes a second plate having a second header inlet communicating with the inlet port and a second header connected to the second header inlet to distribute the refrigerant to the refrigerant passage.

The first header inlet portion and the second header inlet portion may be disposed to be staggered from each other based on a direction in which the first and second heat exchange plates are stacked.

With respect to the first extension line (ℓ1) in the front-rear direction passing through the center of the first header inlet and the second extension line (ℓ2) in the front-rear direction passing through the center portion of the second header inlet, the first and second extension lines (ℓ1, L2). The distance between) may form a first separation distance (S1).

A third extension line (ℓ3) in the front-rear direction passing through a point closest to the second header inlet of the first header inlet and a front-rear direction passing through a point closest to the first header inlet of the second header inlet With respect to the fourth extension line (ℓ4) of, the third extension line (ℓ3) may be configured not to meet the second header inlet.

The fourth extension line ℓ4 may be configured not to meet with the first header inlet.

A distance between the third and fourth extension lines ℓ3 and ℓ4 may form a second separation distance S2, and the first separation distance S1 may be greater than the second separation distance S2.

The first and second header inlets may extend radially from the center of the inlet port.

The maximum width W1 in the circumferential direction of the first header inlet may be formed equal to the maximum width W1 in the circumferential direction of the second header inlet.

The first separation distance S1 may be larger than a maximum width W1 in the circumferential direction of the first header inlet or a maximum width W1 in the circumferential direction of the second header inlet.

The sum of the cross-sectional areas of the header inlet portions provided in each of the plurality of heat exchange plates may be 20% or more and 100% or less of the cross-sectional area of the inlet port.

The first header or the second header includes a connection port formed therethrough to distribute the refrigerant to an adjacent heat exchange plate.

The header is disposed on the circumferential side of the inlet port, and the plurality of connection ports may be arranged in a circumferential direction.

The cross-sectional area of the connection port may be formed to be at least three times the cross-sectional area of the first header inlet or the second header inlet.

A header outlet portion extending from the first header or the second header and discharging the refrigerant in the header to the refrigerant passage is further included.

The header outlet may extend in a radial direction from an outer surface of the header.

According to the present invention according to the above-described solution, a header is installed around the refrigerant inlet port to guide the flow of refrigerant to the adjacent plate, thereby improving the refrigerant distribution performance to a plurality of heat exchange plates. Therefore, there is an advantage in that the heat transfer area of a plurality of heat exchange plates can be evenly utilized.

In detail, by applying a double tube structure of the refrigerant inlet port and the header, the refrigerant flowing in the stacking direction through the refrigerant inlet port flows into the header of each plate, and the refrigerant in the header is stacked toward the header of the adjacent plate through the connection port. Since it can flow in the direction, the refrigerant can be uniformly distributed to each plate.

In addition, since the heat exchange plate is provided with a header inlet portion connecting the inlet port and the header, the refrigerant can easily flow into the header from the inlet port.

And, while the first header inflow portion provided in the first plate and the second header inflow portion provided in the second plate are positioned adjacent to each other, they are arranged to be staggered with respect to the front-rear direction (stacking direction), that is, not overlapping. It is possible to lower the flow resistance of the refrigerant flowing into the header. As a result, there is an advantage that the refrigerant can be easily introduced into the refrigerant passage formed by the first and second plates.

In addition, the refrigerant flowing in the header may be discharged through the header outlet and flow to the outlet port of the refrigerant. Further, a plurality of header outlet portions are provided, and a plurality of header outlet portions extend from the header in a direction toward the outlet port of the refrigerant, so that the refrigerant flows toward the outlet port of the refrigerant can be facilitated.

In addition, since the connection port is discharged between the plurality of header outlets, the refrigerant flowing in the stacking direction through the connection port can be easily discharged from the header through the adjacent header outlet.

1 is a perspective view showing the configuration of a plate heat exchanger according to an embodiment of the present invention.
2 is a view showing a configuration of a heat exchange plate constituting a plate heat exchanger according to an embodiment of the present invention.
3 is an enlarged front view of portion "A" of FIG. 2.
4 is a view showing a state in which first and second plates are arranged in a stacking direction according to an exemplary embodiment of the present invention.
5 is a view showing a configuration of a header inlet provided in the first and second plates according to an embodiment of the present invention.
6 is a diagram showing a partial configuration of a plate package P according to an embodiment of the present invention.
7 is a cross-sectional view taken along line VII-VII' of FIG. 6.
8 is a cross-sectional view taken along line VIII-VIII' of FIG. 6.
9 is a schematic diagram showing a flow of refrigerant in a plate package P according to an embodiment of the present invention.
10 is a view showing a flow of refrigerant from a refrigerant inlet port to a refrigerant outlet port in a plate according to an embodiment of the present invention.
11 is a view showing the configuration of a header inlet provided in the first and second plates according to another 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 the configuration of a plate heat exchanger according to an embodiment of the present invention, and FIG. 2 is a view showing the configuration of a heat exchange plate constituting a plate heat exchanger according to an embodiment of the present invention.

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

The heat exchange plate 100 may be formed of a metal material having excellent thermal conductivity and excellent pressure resistance to 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 a front-rear direction (refer to FIG. 1, in an up-down direction). The front-rear direction may be referred to as "stacking direction".

A flow path through which fluid flows is formed between the plurality of heat exchange plates 100. 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 sequentially arranged alternately with each other.

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 at the rear of the plate package P. 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 for allowing a first fluid to flow into the inside of the plate package P and an agent for allowing a second fluid to flow into the inside of the plate package P 2 inlet part 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. For example, the first fluid may be a refrigerant, and the second fluid may be water. Accordingly, the first inlet 61 may be referred to as a refrigerant inlet, and the second inlet 71 may be referred to as a water inlet.

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

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

In detail, the first inlet 61 and the first outlet 65 may be disposed on the first and fourth corners of the four corners of the end plate 20 arranged in a diagonal direction. In addition, the first inlet 61 may be positioned under the first end plate 20, and the first outlet 65 may be positioned above the first end plate 20.

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

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

The heat exchange plate 110 is arranged at the four corners of the plate body 110 and communicates with the first and second inlets 61 and 71 and the first and second outlets 65 and 75 to prevent fluid A plurality of inlet and outlet ports (130, 135, 140, 145) for guiding 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.

A first inlet port 130 and a first outlet 65 formed at a position corresponding to the first inlet 61 and into which the first fluid (refrigerant) flows into the plurality of inlet and outlet ports 130, 135, 140, 145, and It is formed in a corresponding position and includes a first outlet port 135 through which the first fluid is discharged. 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 to the rear of the heat exchange plate 100 through the first inlet port 130 and flows into the first flow path R1 of the plate package P, and heat exchanged in the refrigerant flow path. The refrigerant is discharged from the plate package P through the first outlet port 135 and may flow forward toward the first outlet 65.

A second inlet port 140 and a second outlet 75 formed at a position corresponding to the second inlet 71 and into which the second fluid (water) flows into the plurality of inlet and outlet ports 130, 135, 140, 145, and A second outlet port 145 formed at a corresponding position and through which the second fluid is discharged is included. 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 second flow path (W1, water flow path) 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 heat exchanged in the water flow path. Water is discharged from the plate package P through the second outlet port 145 and may flow forward toward the second outlet 75.

On the front surface of the plate body 110, irregularities are included. In detail, the irregularities include 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 the protrusions 112 and the depressions 114 may be provided, and may be alternately disposed. In addition, the irregularities may be included in the rear surface of the plate body 110.

For example, a herringbone pattern may be formed on the 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. And, the concave-convex contacted may be joined by a predetermined method. For example, the predetermined method may include a welding method or an adhesive method. For example, the protrusion 112 of the second plate 102 may be adhered to the depression 114 of the first plate 101.

3 is an enlarged front view of portion "A" of FIG. 2, FIG. 4 is a view showing a state in which first and second plates according to an embodiment of the present invention are arranged in a stacking direction, and FIG. 5 is A diagram showing a configuration of a header inlet provided in the first and second plates according to an example.

3 to 5, the heat exchange plate 100 according to the embodiment of the present invention has a first inlet port 130 formed through one edge of the plate body 110. The first inlet port 130 may have a circular shape, for example.

The plate body 110 includes a flat plate portion 115 disposed around the first inlet port 130 and having a flat surface. In other words, the first inlet port 130 may be understood to be formed in the flat plate portion 115. The flat plate portion 115 may form a junction portion that is joined to an adjacent heat exchange plate.

A header 200 through which at least a portion of the first fluid flowing through the first inlet port 130 flows may be provided in the flat plate portion 115. The header 200 may be configured to form an arc shape having a width w set in the radial direction. Here, the "radial direction" may be a direction defined based on the center of the first inlet port 130.

Accordingly, the header 200 may be disposed to surround at least a portion of the outer peripheral surface of the first inlet port 130. In addition, a refrigerant flow space through which refrigerant flows may be formed in the header 200.

The header 200 may be located on the flat plate 115 in a region between the first inlet port 130 disposed at one edge of the heat exchange plate 100 and the central portion of the heat exchange plate 100. have.

In the header 200, the header body 210 protruding from the flat portion 115 and the first inlet port 130 extends to the header body 210 so that the refrigerant flows into the header 200. A header inlet 220 is included. The header inlet 220 protrudes from the flat plate 115 and may be connected to an outer surface of the header body 210.

In detail, the header inlet 220 is connected to the first arc surface 211 of the header body 210. The first arc surface 211 may surround at least a portion of the circumference of the first inlet port 130 and extend round in a circumferential direction at a set curvature. For example, the header inlet 220 may have a substantially semi-circular or polygonal shape, and the diameter or inner length of the header inlet 220 may be formed in a range of 0.5 to 2.0 mm at most.

Referring to FIG. 4, the heat exchange plate 100 includes first and second plates 101a and 101b disposed adjacent to each other. The first and second plates 101a and 101b are joined to each other, and in the space between the protrusions 112 and the depressions 114 provided in the first and second plates 101a and 101b, respectively, a refrigerant flows. A first flow path R1 (refrigerant flow path) may be formed.

The first and second plates 101a and 101b may be joined at a plurality of joint portions. In detail, in the plurality of bonding portions, a first bonding portion 118a provided at the edge-side end portion of the first and second plates 101a and 101b, a second bonding portion 118b provided in the flat portion 115, and A third joint portion 118c disposed between the first inlet port 130 and the second outlet port 145 is included.

By the plurality of joints, the adjacent two heat exchange plates 100 are sealed to the outside to form the first flow path R1 or the second flow path W1, water flow path, and the first flow path R1 and The second flow path W1 may be separated from each other. Therefore, mixing of the first fluid (refrigerant) and the second fluid (water) can be prevented.

The first plate 101a includes a first header inlet 220a communicating with the first inlet port 130. Further, the second plate 101b includes a second header inlet 220b communicating with the inlet port 130.

The refrigerant introduced through the first and second header inlet portions 220a and 200b flows into the first and second headers 200a and 200b of the first and second plates 101a and 101b, respectively, and the header outlet 230 ) May flow into the first flow path R1 formed by the first and second plates 101a and 101b. And, since the inner space in the first and second headers 200a and 200b can be communicated through the connection port 240, the refrigerant in one header among the first and second headers 200a and 200b is distributed to the other headers. Can be.

In detail, referring to FIG. 5, the rear surface of the first plate 101a and the front surface of the second plate 101b may be disposed to be bonded to each other.

The first header inlet 220a protrudes forward from the first plate 101a, extends in a radial direction, and is connected to the first header 200a. In addition, the second header inlet 220b protrudes rearward from the first plate 101b and extends in a radial direction, and is connected to the second header 200b.

In this way, since a plurality of header inlet portions 220a and 220b are provided, at least a portion of the refrigerant flowing backward along the first inlet port 130 of the plurality of heat exchange plates 100 flows into the first and second headers. It is branched from the portions 220a and 220b and can easily flow into the first flow path R1 formed by the first and second plates 101a and 101b. That is, since a plurality of inflow passages are formed, the inflow performance of the refrigerant can be improved.

The first header inflow part 220a and the second header inflow part 220b are disposed to be staggered with respect to the front-rear direction (stacking direction) and are not located on the same line. That is, in the front-rear direction (stacking direction), the first header inflow part 220a and the second header inflow part 220b may not overlap with each other.

In detail, a first extension line (ℓ1) in the front-rear direction passing through the central portion of the first header inlet portion 220a and a second extension line (ℓ2) in the front-rear direction passing through the center portion of the second header inlet portion 220b are defined. At this time, the distance between the first and second extension lines ℓ1 and ℓ2 forms a first separation distance S1.

The first header inflow of the third extension line (ℓ3) in the front-rear direction passing through a point closest to the second header inflow part 220b among the first header inflow part 220a and the second header inflow part 220b When defining the fourth extension line (ℓ4) in the front-rear direction passing through the point closest to the part 220a, the third extension line (ℓ3) does not meet the second header inlet (220b), and the fourth extension line ( ℓ4) may be configured not to meet with the first header inlet 220a.

A distance between the third and fourth extension lines ℓ3 and ℓ4 may form a second separation distance S2, and the first separation distance S1 may be greater than the second separation distance S2. According to this configuration, the first and second header inlet portions 220a and 220b may not overlap each other in the front-rear direction.

The maximum width W1 in the circumferential direction of the first header inlet 220a may be formed equal to the maximum width W1 in the circumferential direction of the second header inlet 220b. According to this configuration, since the inflow passages flowing into the first and second plates 101 and 101b are branched into two equal passages, at least some of the refrigerants passing through the first inlet port 130 are 2 It can be evenly distributed to the header inlet (220a, 220b). That is, the refrigerant flows flowing into the first flow path R1 do not interfere with each other, and the refrigerant can be easily distributed to the wide plate-shaped heat exchange plate 100.

The first separation distance S1 is larger than the maximum width W1 in the circumferential direction of the first header inlet 220a or the maximum width W1 in the circumferential direction of the second header inlet 220b Can be formed.

In this way, the first and second header inlet portions 220a and 220b are spaced apart from the widths of the first and second header inlet portions 220a and 220b. Refrigerant flow resistance around (220a, 220b) may be reduced. As a result, the distribution effect of the flow of refrigerant flowing into the first and second header inlet portions 220a and 220b may be further improved.

The header 200 further includes a header outlet 230 extending radially from the header body 210 and discharging the refrigerant in the header body 210 to the first flow path R1. The first flow path R1 may be formed in a space between the two closest heat exchange plates 100. In addition, the header outlet portion 230 may protrude from the flat plate portion 115.

In detail, the header outlet 230 is connected to the second arc surface 212 of the header body 210. The second arc surface 212 has a larger radius of curvature than the first arc surface 211 and may extend roundly at a curvature set to surround the first arc surface 211.

A plurality of header outlets 230 may be provided. The plurality of header outlet portions 230 are spaced apart from each other in a circumferential direction, and each header outlet portion 230 may extend from the second arc surface 212 in a radial direction. In detail, the plurality of header outlet portions 230 may include a first outlet portion 231, a second outlet portion 232, and a third outlet portion 233. Since a plurality of header outlets 230 are provided, the refrigerant in the header 200 can easily flow into the first flow path R1.

The header 200 further includes a connection port 240 formed through at least a portion of the header body 210. The connection port 240 may be formed on the front surface of the header body 210. The refrigerant in the header body 210 may be discharged through the connection port 240 and may flow into the header 240 through the connection port 240 of the adjacent heat exchange plate 100.

For example, the connection port 240 may have a circular shape. However, the shape of the connection port 240 is not limited thereto, and may have a polygonal shape.

A plurality of connection ports 240 may be provided. The plurality of connection ports 240 are spaced apart from each other in a circumferential direction, and may include at least four connection ports 240. In detail, the plurality of connection ports 240 includes a first port 241, a second port 242, a third port 243, and a fourth port 244. However, there is no limit to the number of connection ports 240.

The header body 210 includes a first end 215 and a second end 216 forming both ends of the header body 210. The first end 215 forms a lower portion of the header body 210, and the second end 216 forms an upper portion of the header body 210. In addition, the header body 210 may be understood to extend in a circumferential direction from the first end 215 toward the second end 216.

The first end 215 may be located under the header inlet 220. In detail, the first end 215 may be formed at a position further extending in the circumferential direction from a point of the first arc surface 211 to which the header inlet 220 is connected. In this way, the header body 210 is configured to further extend downwardly from the header inlet 220, so that when the liquid refrigerant flows through the header inlet 220, the liquid refrigerant is reduced by gravity. It is possible to flow toward the end 215. As a result, a storage space for a liquid refrigerant may be formed in the header body 210.

6 is a view showing a partial configuration of a plate package P according to an embodiment of the present invention, FIG. 7 is a cross-sectional view taken along VII-VII' of FIG. 6, and FIG. 8 is VIII-VIII' of FIG. It is a cross-sectional view taken along the line.

Referring to FIG. 6, a plate package P according to an embodiment of the present invention includes a plurality of heat exchange plates 101a to 101n. For example, 76 heat exchange plates may be included in the plate package P. Half of these, that is, 38 heat exchange plates may be plates contributing to forming the first flow path R1, and the remaining 38 heat exchange plates may be plates contributing to forming the second flow path W1. .

Further, adjacent plates forming the first and second flow paths R1 and W1 may be alternately disposed. For example, the first and second plates 101a and 101b are joined to form the first flow path R1, and the second and third plates 101b and 101c are joined to form the second flow path W1. . In addition, the third and fourth plates 101c and 101d may be joined to form the first flow path R1. This arrangement may be repeated to constitute the plate package P.

In order to secure the refrigerant heat exchange performance in the plurality of heat exchange plates 101a to 101n, an appropriate amount of refrigerant needs to be introduced into the header 200, and the size of the header inlet 220 is determined in consideration of this. There is a need. In detail, the total cross-sectional area of the header inlet 220 through which the refrigerant flows into the header 200, that is, the sum of the cross-sectional areas of the header inlet 220 of the 38 heat exchange plates forming the first flow path R1 is the second 1 It is necessary to be at least 20% of the cross-sectional area of the inlet port 130.

If the sum of the cross-sectional areas of the header inlet 220 is not more than 20% of the cross-sectional area of the first inlet port 130, the inlet pressure of the plate heat exchanger 10, that is, the first inlet 61 The problem of a large increase in pressure loss in

Meanwhile, the sum of the cross-sectional areas of the header inlet 220 of the 38 heat exchange plates needs to be 100% or less of the cross-sectional area of the first inlet port 130. If the sum of the cross-sectional areas of the header inlet 220 is 100% or more of the cross-sectional area of the first inlet port 130, the header 200 of each plate 100 from the first inlet port 130 There may be a problem in that the distribution deviation of the refrigerant flowing into the tank increases significantly.

The diameter of the connection port 240 may be formed in a range of approximately 1.2 ~ 1.8mm. In addition, the cross-sectional area of the connection port 240 may be formed to be greater than or equal to a preset size in order to evenly distribute the refrigerant to the plurality of heat exchange plates 100. For example, the cross-sectional area of the connection port 240 provided in each plate 100 may be formed to be 3 times or more of the cross-sectional area of the header inlet 220. The cross-sectional area of the connection port 240 may be understood as a total cross-sectional area of the plurality of connection ports 240.

If the sum of the cross-sectional areas of the plurality of connection ports 240 is not formed to be more than three times the cross-sectional area of the header inlet 220, an equal refrigerant distribution effect for each play through the connection port 240 is achieved. May not be.

Referring to FIG. 7, first inlet ports 130 provided in each heat exchange plate 100 are arranged in the front and rear directions. In addition, headers 200 provided in each of the heat exchange plates 100 may be arranged in a front-rear direction, and connection ports 240 formed in the headers 200 may also be arranged in a front-rear direction. An assembly of a plurality of headers 200 arranged in the front-rear direction may be referred to as a "header assembly".

In detail, the plurality of heat exchange plates 100 includes a first plate 101a, a second plate 101b, a third plate 101c, and a fourth plate 101d that are stacked from the front to the rear.

Each of the first to fourth plates 101a, 101b, 101c, and 101d has a first inlet port 130 through which the first fluid introduced through the first inlet 61 flows, and a plurality of first inlets The ports 130 may be aligned in the front-rear direction.

Each of the first to fourth plates 101a, 101b, 101c, and 101d has a second outlet port 145 through which the second fluid heat-exchanged with the first fluid flows out toward the second outlet 75, and a plurality of The second outlet port 145 of the may be aligned in the front-rear direction.

In addition, the first fluid flowing from the first inlet port 130 toward the first flow path R1 and the second fluid flowing from the second flow path W1 toward the second outlet port 145 are 3 It may be separated from each other by the bonding portion of the bonding portion (118c) and the protruding portion 112 and the depression 114 formed in the plate 100.

The first to fourth plates 101a, 101b, 101c, 101d are provided in each header 220, a first plate port 240a, a second plate port 240b, a third plate port 240c, and a third plate port 240c. The four plate ports 240d may be configured to be aligned in the front-rear direction. The first to fourth plate ports 240a, 240b, 240c, and 240d may be understood as "connection ports" provided in each plate.

Refrigerant distribution between plates may be achieved through the aligned first to fourth plate ports 240a to 240d. That is, the refrigerant introduced into each header 200 of the plate through the first inlet port 130 flows in the front and rear direction through the first to fourth plate ports 240a to 240d, and a plurality of heat exchange plates 100 ) Can be distributed.

As a result, the refrigerant existing in the header 200 of any one heat exchange plate 100 may flow into the header 200 of another adjacent heat exchange plate 100 through the connection port 240. That is, since the refrigerant may flow toward the adjacent heat exchange plate 100 through the header 200 arranged in the front-rear direction, the refrigerant distribution performance to each plate 100 may be improved.

The first header inlet 220a provided in the first plate 101a and the second header inlet 220b provided in the second plate 101b are staggered with respect to the front-rear direction, that is, the stacking direction (overlap Not) can be placed.

In detail, referring to FIG. 8, when considering six plates 101a, 101b, 101c, 101d, 101e, and 101f sequentially stacked in the front-rear direction among the plate package P, the second plate 101b is a first plate. It is disposed behind 101a, and the third plate 101c is disposed behind the second plate 101b. In addition, the fourth plate 101d is disposed behind the third plate 101c, the fifth plate 101e is disposed behind the fourth plate 101d, and the sixth plate 101f is a fifth plate. It may be disposed behind the plate 101e.

The first flow path is provided in the space between the first and second plates 101a and 101b, the space between the third and fourth plates 101c and 101d, and the space between the fifth and sixth plates 101e and 101f. (R1) can be defined.

The first header inlet 220a provided in the first plate 101a and the second header inlet 220b provided in the second plate 101b may not overlap with each other in the front-rear direction.

The third header inlet 220c provided in the third plate 101c and the fourth header inlet 220d provided in the fourth plate 101d may not overlap with each other in the front and rear directions.

The fifth header inlet 220e provided in the fifth plate 101e and the sixth header inlet 220f provided in the sixth plate 101f may not overlap with each other in the front and rear directions.

Meanwhile, the first header inlet 220a and the third header inlet 220c may overlap each other in the front and rear directions. In detail, the fifth extension line ℓ5 in the front-rear direction passing through the central portion of the first header inlet portion 220a may pass through the central portion of the third header inlet portion 220c. Further, the fifth extension line ℓ5 may pass through the center of the fifth header inlet 220e. In summary, the first, third, and fifth header inlet portions 220a, 220c, and 220e may be aligned in a line in the front-rear direction.

In addition, the second header inlet portion 220b and the fourth header inlet portion 220d may overlap each other in the front-rear direction. In detail, the sixth extension line (ℓ6) in the front-rear direction passing through the center of the second header inlet portion 220b may pass through the center of the fourth header inlet portion 220d. In addition, the sixth extension line (ℓ6) may pass through the center of the sixth header inlet portion (220f). In summary, the second, fourth, and sixth header inlet portions 220b, 220d, and 220f may be aligned in a line in the front-rear direction.

According to this configuration, some of the refrigerants flowing through the first inlet ports 130 of the plurality of heat exchange plates 100 in the front-rear direction are the first to sixth header inlets 220a, 220b, 220c, 220d, 220e. , 220f) may be uniformly introduced into the first flow path R1.

In detail, some of the refrigerants flowing in the front and rear directions through the first inlet ports 130 of the plurality of heat exchange plates 100 are introduced into the first and second header inlets 220a and 220b to be It flows into the inside of each header 200 of (101a, 101b), and is discharged through the header outlet 230. In addition, the discharged refrigerant may flow by flowing into the first flow path R1a formed by the first and second plates 101a and 101b.

On the other hand, some of the refrigerants flowing through the first inlet ports 130 of the plurality of heat exchange plates 100 in the front-rear direction are introduced into the third and fourth header inlets 220c and 220d. It flows into the inside of each header 200 of the plates 101c and 101d. In addition, some of the refrigerants among the refrigerants present in each header 200 of the first and second plates 101a and 101b are transferred to each header of the third and fourth plates 101c and 101d through the connection port 240. It can flow inside 200.

In addition, the refrigerant inside each header 200 of the third and fourth plates 101c and 101d is discharged through the header outlet 230, and the discharged refrigerant is formed by the third and fourth plates 101c and 101d. It may flow into and flow into the first flow path R1b. The first flow path R1b may be disposed behind the first flow path R1a.

Another part of the refrigerant flowing through the first inlet port 130 of the plurality of heat exchange plates 100 in the front-rear direction flows into the fifth and sixth header inlet portions 220e and 220f, and the fifth and sixth plates It flows into the inside of each header 200 of (101e, 101f). In addition, some of the refrigerants present in the headers 200 of the first and second plates 101a and 101b or among the refrigerants present in the headers 200 of the third and fourth plates 101c and 101d Some of the refrigerant may flow into the headers 200 of the fifth and sixth plates 101e and 101f through the connection port 240.

In addition, the refrigerant inside each header 200 of the fifth and sixth plates 101e and 101f is discharged through the header outlet 230, and the discharged refrigerant is formed by the fifth and sixth plates 101e and 101f. It may flow into and flow into the first flow path R1c. The first flow path R1c may be disposed behind the first flow path R1b.

A plurality of header outlets 230 for discharging at least some of the refrigerants present in the header body 210 to the first flow path R1 are provided on the outer circumference of the header body 210. The refrigerant discharged through the plurality of header outlets 230 may flow toward the first outlet port 135 via the first flow path R1.

9 is a schematic diagram showing a flow of refrigerant in a plate package P according to an embodiment of the present invention, and FIG. 10 is a view of a flow of refrigerant from a refrigerant inlet port to a refrigerant outlet port in a plate according to an embodiment of the present invention. It is a drawing showing.

First, referring to FIG. 9, the refrigerant f1 introduced through the first inlet 61 flows backward and passes through the first inlet ports 130 aligned up and down of the plate package P, and each heat exchange plate It may be introduced into each header body 210 through the header inlet 220 of (100) (f2). In this case, the flow f2 is the first and second header inlets 220a and 220b, the third and fourth header inlets 220c and 220d, or the fifth and sixth header inlets ( 220e, 220f) may be introduced into the header body 210.

The refrigerant introduced into the header body 210 may flow in a circumferential direction along the header body 210 extending round in an arc shape (f3), and the first flow path R1 through the header outlet 230 Can be introduced into (f4). The first flow path R1 may be defined as an internal space of the protrusion 112 and the depression 114 joined as a space between the two stacked heat exchange plates 100. For example, the first flow path R1 may be defined in a space between the first and second plates 101a and 101b, the third and fourth plates 101c and 101d, and the fifth and sixth plates 101e and 101f. have.

In addition, the refrigerant in the first flow path R1 may exchange heat with water in the adjacent second flow path W1. The second flow path W1 may be defined as an inner space of the protrusion 112 and the depression 114 joined as a space between the two heat exchange plates 100 of another combination. For example, the second flow path W1 may be defined in a space between the second and third plates 101b and 101c and the fourth and fifth plates 101d and 101e.

On the other hand, the inner space of the header body 210, that is, the flow space of the refrigerant, is communicated with the header body 210 of the adjacent plate by the connection ports 240 aligned in the vertical direction, so that the flow loss of the refrigerant is transferred to the adjacent plate The refrigerant can be distributed. That is, as the pressure of the refrigerant flowing through the first inlet ports 130 aligned in the front-rear direction becomes equal, the refrigerant is evenly distributed to the header 200 of each heat exchange plate 100 through the header inlet 220. Can be distributed.

Next, referring to FIG. 10, the refrigerant flowing into the first flow path R1 through the header outlet 230 flows in a diagonal direction of the heat exchange plate 100 and faces the first outlet port 135.

The first outlet port 135 is formed through at least a portion of the heat exchange plate 100. In addition, a port connection part 136 for guiding the refrigerant from the first flow path R1 to the first outlet port 135 may be provided at the circumference side of the first outlet port 135. A plurality of port connection parts 136 may be provided, and may extend radially from the outer periphery of the first outlet port 135. Accordingly, the refrigerant in the first flow path R1 may be discharged to the first outlet port 135 through the plurality of port connection parts 136.

In a state in which a plurality of heat exchange plates 100 are stacked in the front-rear direction, the first outlet ports 135 of each heat exchange plate 100 may be aligned in the front-rear direction. The refrigerants discharged through the first outlet port 135 of each heat exchange plate 100 are bonded together, and the laminated refrigerant may be discharged from the plate heat exchanger 10 through the first outlet section 65.

11 is a view showing the configuration of a header inlet provided in the first and second plates according to another embodiment of the present invention.

Referring to FIG. 11, a header inlet 220 ′ according to another embodiment of the present invention may have a semi-circular shape. The header inlet portion 220' may include a first header inlet portion 220a' provided in the first plate 101a and a second header inlet portion 220b' provided in the second plate 101b. have.

The technical content described in FIG. 5 can be similarly applied to FIG. 11. In detail, the first header inlet 220a' and the second header inlet 220b' are disposed to be staggered with respect to the front-rear direction (stacking direction) and are not positioned on the same line. That is, with respect to the front-rear direction (stacking direction), the first header inlet 220a' and the second header inlet 220b' may not overlap with each other.

In detail, a first extension line (ℓ1') in the front-rear direction passing through the central portion of the first header inlet portion 220a' and a second extension line (ℓ2') in the front-rear direction passing through the center portion of the second header inlet portion (220b'). When defining ), the distance between the first and second extension lines ℓ1' and ℓ2' forms a first separation distance S1'.

The third extension line (ℓ3') in the front-rear direction passing through a point closest to the second header inlet portion 220b' among the first header inlet portion 220a' and the second header inlet portion 220b' When defining the fourth extension line (ℓ4') in the front-rear direction passing through the point closest to the first header inflow part (220a'), the third extension line (ℓ3') and It does not meet, and the fourth extension line (ℓ4') may be configured not to meet the first header inlet (220a').

The distance between the third and fourth extension lines (ℓ3', ℓ4') forms a second separation distance (S2'), and the first separation distance (S1') is to be formed larger than the second separation distance (S2'). I can. With this configuration, the first and second header inflow portions 220a' and 220b' may not overlap each other in the front-rear direction.

The diameter d1 of the first header inlet 220a' may be formed equal to the diameter of the second header inlet 220b'. According to this configuration, the inflow passage flowing into the first and second plates 101 and 101b can be divided into two equal passages.

The first separation distance S1' may be larger than the diameter d1 of the first header inlet 220a' or the diameter d1 of the second header inlet 220b'. In this way, the first and second header inlet portions 220a' and 220b' are spaced apart from each other by forming a relatively large diameter of the first and second header inlet portions 220a' and 220b', Refrigerant flow resistance around the header inlet portions 220a' and 220b' may be reduced.

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
112: protrusion 114: depression
130: first inlet port 135: first outlet port
140: second inlet port 145: second outlet port
200: header 210: header body
220: header inlet 230: header outlet
240: connection port

Claims (14)

A refrigerant inlet through which refrigerant is introduced;
A plate package having a refrigerant inlet port communicating with the refrigerant inlet part, wherein a plurality of heat exchange plates are stacked in a front-rear direction to form a refrigerant passage; And
It is connected to the plate package and includes a refrigerant outlet through which refrigerant is discharged,
In the plurality of heat exchange plates,
A first plate having a first header inlet connected to the refrigerant inlet port and a first header connected to the first header inlet to distribute refrigerant to the refrigerant passage; And
A second plate disposed adjacent to the first plate and provided with a second header inlet portion communicating with the refrigerant inlet port and a second header connected to the second header inlet portion to distribute the refrigerant to the refrigerant passage. Included,
The first header inlet portion and the second header inlet portion are disposed to be staggered from each other based on a direction in which the first and second heat exchange plates are stacked,
With respect to the first extension line (ℓ1) in the front-rear direction passing through the center portion of the first header inlet and the second extension line (ℓ2) in the front-rear direction passing through the center portion of the second header inlet portion,
The distance between the first and second extension lines (ℓ1, L2) forms a first separation distance (S1),
The first and second header inlet portions extend radially from the center of the refrigerant inlet port,
The first separation distance (S1) is a plate-type heat exchanger that is formed larger than the maximum width (W1) in the circumferential direction of the first header inlet portion or the maximum width (W1) in the circumferential direction of the second header inlet portion. The method of claim 1,
In the plurality of heat exchange plates,
A third plate disposed behind the second plate and having a third header inlet portion communicating with the refrigerant inlet port; And
A fourth plate disposed adjacent to the third plate, having a fourth header inlet portion communicating with the coolant inlet port, and forming the coolant flow path together with the third plate,
The third header inflow portion and the fourth header inflow portion are disposed to be staggered with respect to the front-rear direction,
The third header inlet portion and the first header inlet portion and the plate type heat exchanger overlapping in the front-rear direction. The method of claim 1,
A third extension line (ℓ3) in the front-rear direction passing through a point closest to the second header inlet of the first header inlet and a front-rear direction passing through a point closest to the first header inlet of the second header inlet For the fourth extension line (ℓ4) of,
The third extension line (ℓ3) is a plate heat exchanger configured not to meet with the second header inlet. The method of claim 3,
The fourth extension line (ℓ4) is a plate-type heat exchanger configured not to meet the first header inlet. The method of claim 3,
The distance between the third and fourth extension lines (ℓ3, L4) forms a second separation distance (S2), and the first separation distance (S1) is formed larger than the second separation distance (S2). delete The method of claim 1,
A plate-type heat exchanger having a maximum width W1 of the first header inlet in a circumferential direction equal to a maximum width W1 of the second header inlet in a circumferential direction. delete The method of claim 1,
The sum of the cross-sectional areas of the first header inlet portion and the second header inlet portion provided in each of the plurality of heat exchange plates is 20% or more and 100% or less of the cross-sectional area of the refrigerant inlet port. The method of claim 1,
In the first header or the second header,
A plate heat exchanger including a connection port formed therethrough to distribute the refrigerant to adjacent heat exchange plates. The method of claim 10,
The first and second headers are disposed on the circumferential side of the refrigerant inlet port,
The plurality of connection ports are plate-type heat exchangers arranged in a circumferential direction. The method of claim 10,
A plate heat exchanger having a cross-sectional area of the connection port of at least three times the cross-sectional area of the first header inlet or the second header inlet. The method of claim 1,
A header outlet portion extending from the first header or the second header and discharging the refrigerant in the first header or the second header to the refrigerant flow path,
The header outlet portion is a plate heat exchanger extending in a radial direction from an outer surface of the first header or the second header. The method of claim 1,
A plate heat exchanger having a circular or polygonal cross section of the first header inlet or the second header inlet.

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