KR102711184B1 - Heat exchanger - Google Patents

Abstract

The present invention provides a heat exchanger including a first heat exchanger and a second heat exchanger in which refrigerant moves and exchanges heat, and a first line through which the refrigerant moves after exchanging heat in the first heat exchanger and a second line through which the refrigerant moves after exchanging heat in the second heat exchanger, each of which moves through a first line tube and a second line tube, wherein the first line tube and the second line tube are arranged to face each other, and the refrigerant flowing through the first line tube and the second line tube moves in opposite directions and includes an internal heat exchanger in which heat is exchanged.

Description

Heat exchanger

The invention relates to a heat exchanger. More specifically, it relates to a heat exchanger for controlling the subcooling of a refrigerant before it is throttled by an expansion valve and the superheating of a refrigerant discharged from an evaporator.

A typical vehicle cooling system, as shown in Fig. 1, is composed of a compression unit (1) that compresses and discharges refrigerant, a condensation unit (2) that condenses the high-pressure refrigerant discharged from the compression unit (1), an expansion valve (3) that condenses the refrigerant condensed and liquefied in the condensation unit (2), and an evaporation unit (4) that cools the air discharged into the interior by absorbing heat due to the latent heat of vaporization of the refrigerant by evaporating the low-pressure liquid refrigerant discharged from the expansion valve (3) through heat exchange with air blown into the interior of the vehicle, thereby forming a refrigeration cycle in which the following refrigerant circulation process is performed.

When the vehicle cooling system is operated, the compression unit (1) is first driven to suck and compress low-temperature and low-pressure gaseous refrigerant and send it to the condensation unit (2) in a high-temperature and high-pressure gaseous state, and the condensation unit (2) condenses the gaseous refrigerant into a low-temperature and high-pressure liquid by exchanging heat with the outside air. Then, the liquid refrigerant sent from the condensation unit (2) in a low-temperature and high-pressure state is rapidly expanded by the throttle action of the expansion valve (3) and sent to the evaporation unit (4) in a low-temperature and low-pressure saturated state, and the evaporation unit (4) exchanges heat with the refrigerant and the air blown into the vehicle interior by the blower. Accordingly, the refrigerant evaporates in the evaporation unit (4) and is discharged in a low-temperature and low-pressure gaseous state and is sucked back into the compression unit (1) to recirculate the refrigeration cycle as described above.

In the refrigerant circulation process, cooling of the vehicle interior is achieved by, as described above, cooling of the air blown by the blower through the evaporator (4) by the latent heat of evaporation of the liquid refrigerant circulating within the evaporator (4) and then discharging it into the vehicle interior in a cooled state.

The cooling efficiency of the cooling system as described above is determined by various factors, among which, the degree of subcooling of the high-pressure refrigerant just before being throttled by the expansion valve (3) and the degree of superheating of the low-pressure refrigerant discharged from the evaporator (4) affect the fluidity of the refrigerant, the pressure drop in the evaporator (4), and the superheated area of the evaporator (4) (a portion of the refrigerant discharge port side of the evaporator) and the volumetric efficiency of the compression unit (1), respectively, and thus have a significant effect on the cooling efficiency. For example, if the degree of subcooling of the refrigerant before being throttled increases, the specific volume of the refrigerant decreases, thereby stabilizing the refrigerant flow and reducing the refrigerant pressure drop in the evaporator (4), thereby increasing the cooling efficiency of the air conditioning system and reducing the power consumption of the compression unit (1).

On the other hand, if the superheat of the low-pressure refrigerant discharged from the evaporator (4) is not maintained appropriately, the superheat area of the evaporator (4) with a relatively high temperature, which is set to allow the refrigerant to completely vaporize, must be expanded to prevent the liquid refrigerant from flowing into the compression section (1), thereby reducing the cooling performance of the air conditioning system.

Accordingly, research is ongoing into vehicle cooling systems to maintain the subcooling of the refrigerant before it is throttled by the expansion valve (3) and the superheating of the refrigerant discharged from the evaporator (4).

Republic of Korea Publication No. 10-2015-0069354.

The invention aims to control the subcooling of refrigerant before it is throttled by an expansion valve and the superheating of refrigerant discharged from an evaporator.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned herein will be clearly understood by those skilled in the art from the description below.

An embodiment of the present invention provides a heat exchanger including a first heat exchange unit and a second heat exchange unit through which refrigerant moves to exchange heat, and a first line through which the refrigerant moves after exchanging heat in the first heat exchange unit and a second line through which the refrigerant moves after exchanging heat in the second heat exchange unit, each of which moves through a first line tube and a second line tube, wherein the first line tube and the second line tube are arranged to face each other, and the refrigerant flowing through the first line tube and the second line tube moves in opposite directions to exchange heat, and includes an internal heat exchange unit.

Preferably, it may be characterized in that a heat exchange fin is arranged between the first line tube and the second line tube of the internal heat exchange part.

Preferably, the first line tube and the second line tube of the internal heat exchanger may be characterized in that they exchange heat through surface contact.

Preferably, the first heat exchanger uses a condenser, and the second heat exchanger uses an evaporator, and the condenser comprises a pair of first header tanks, a plurality of first tubes arranged to connect between the first header tanks, a plurality of first fins arranged between the first tubes, and a first housing, and the evaporator comprises a pair of second header tanks, a plurality of second tubes arranged to connect the second header tanks, a plurality of second fins arranged between the second tubes, and a second housing.

Preferably, the inner wall of the first housing may be brazed to both sides of the plurality of first tubes to form a plurality of first coolant movement passages.

Preferably, the first housing may be characterized in that a first inlet passage and a first outlet passage for cooling water are arranged so as to extend across the arrangement direction of the plurality of first tubes and protrude from the surface of the first housing.

Preferably, the inner wall of the second housing may be brazed to both sides of the plurality of second tubes to form a plurality of second coolant movement passages.

Preferably, the second housing may be characterized in that a second inlet passage and a second outlet passage for cooling water are arranged so as to extend across the arrangement direction of the plurality of second tubes and protrude from the surface of the second housing.

Preferably, the first header tank and the second header tank are connected integrally, and the first line tube and the second line tube are disposed between the first header tank and the second header tank.

Preferably, the first header tank and the second header tank form a linear passage, and a plurality of baffles are arranged inside the first header tank and the second header tank to control the flow path of the refrigerant.

Preferably, the refrigerant flowing into the first header tank may move from the upper part of the condensing section to the lower part, and the refrigerant flowing into the second header tank may move from the lower part of the evaporating section to the upper part.

In addition, the present invention includes a water-cooled condenser in which refrigerant moves through a plurality of first tubes arranged in a one-sided direction; a water-cooled evaporator in which refrigerant moves through a plurality of second tubes arranged in the one-sided direction; and an internal heat exchanger for heat-exchanging the refrigerant passing through the water-cooled condenser and the refrigerant passing through the water-cooled evaporator, wherein the water-cooled condenser, the water-cooled evaporator, and the internal heat exchanger can be implemented as heat exchangers that share a pair of header tanks.

Preferably, the water-cooled condenser includes a first housing surrounding a plurality of the first tubes, and the water-cooled evaporator includes a second housing surrounding a plurality of the second tubes, and the temperature of the refrigerant is controlled by cooling water moving inside the first housing and the second housing.

Preferably, the first housing and the second housing may be characterized in that an inlet passage and an outlet passage are respectively arranged for the cooling water to move.

Preferably, the pair of header tanks may be provided with a straight pipe structure, and the internal heat exchanger may be characterized by being arranged between the water-cooled condenser and the water-cooled evaporator.

Preferably, the header tank may be characterized in that a plurality of baffles are arranged inside the tank to form a flow path.

Preferably, the internal heat exchanger may be characterized in that the first line through which the refrigerant moves from the water-cooled condenser to the expansion valve and the second line through which the refrigerant moves from the water-cooled evaporator to the compression unit each move through the first line tube and the second line tube, wherein the first line tube and the second line tube are arranged to face each other, and the refrigerant flowing through the first line tube and the second line tube move in opposite directions while exchanging heat.

Preferably, it may be characterized in that a heat exchange fin is arranged between the first line tube and the second line tube.

According to an embodiment, the cooling efficiency can be increased by controlling the subcooling degree of the refrigerant before being throttled by the expansion valve and the superheating degree of the refrigerant discharged from the evaporator.

In addition, by combining multiple heat exchangers into an integrated structure, there is an effect of reducing costs by minimizing parts.

In addition, it has the effect of reducing the risk of refrigerant leakage and simplifying assembly by reducing the number of connections between each component of the system.

The various advantageous and beneficial effects of the present invention are not limited to the above-described contents, and will be more easily understood in the course of explaining specific embodiments of the present invention.

Figure 1 is a structural diagram of a typical vehicle cooling system.
Figure 2 is a structural diagram of a vehicle heat exchange system in which a heat exchanger according to an embodiment of the present invention is used.
Figure 3 is a structural diagram of a heat exchanger according to an embodiment of the present invention.
Fig. 4 is a perspective view of the embodiment of Fig. 2,
Figure 5 is a cross-sectional view along the AA` direction of Figure 4.
Figure 6 is a cross-sectional view along the BB` direction of Figure 4.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

However, the technical idea of the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of the present invention, one or more of the components between the embodiments can be selectively combined or substituted for use.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention can be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the present invention belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, can be interpreted in consideration of the contextual meaning of the relevant technology.

Additionally, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention.

In this specification, the singular may also include the plural unless specifically stated otherwise in the phrase, and when it is described as “A and/or at least one (or more) of B, C”, it may include one or more of all combinations that can be combined with A, B, C.

Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

These terms are only intended to distinguish one component from another and are not intended to limit the nature, order, or sequence of the component.

In addition, when a component is described as being “connected,” “coupled,” or “connected” to another component, it may include not only cases where the component is directly connected, coupled, or connected to the other component, but also cases where the component is “connected,” “coupled,” or “connected” by another component between the component and the other component.

In addition, when described as being formed or arranged “above or below” each component, above or below includes not only the case where the two components are in direct contact with each other, but also the case where one or more other components are formed or arranged between the two components. In addition, when expressed as “above or below,” it can include the meaning of the downward direction as well as the upward direction based on one component.

Hereinafter, embodiments will be described in detail with reference to the attached drawings. Regardless of the drawing symbols, identical or corresponding components will be given the same reference numbers and redundant descriptions thereof will be omitted.

The present invention is implemented as a heat exchanger including a first heat exchange unit and a second heat exchange unit in which refrigerant moves and exchanges heat, and a first line (501) through which refrigerant moves after heat exchange in the first heat exchange unit and a second line (502) through which refrigerant moves after heat exchange in the second heat exchange unit, respectively, moving through a first line tube (520) and a second line tube (530), wherein the first line tube (520) and the second line tube (530) are arranged to face each other, and the refrigerant flowing through the first line tube (520) and the second line tube (530) exchanges heat while moving in opposite directions, and including an internal heat exchange unit (500).

In the present invention, the first heat exchanger uses a condenser (200) and the second heat exchanger uses an evaporator (400), and an internal heat exchanger (500) may be provided in which heat exchange occurs between refrigerants moving between the condenser (200) and the evaporator (400).

FIG. 2 is a structural diagram of a vehicle heat exchange system in which a heat exchanger according to an embodiment of the present invention is used.

Referring to FIG. 2, a heat exchanger according to an embodiment of the present invention is used in a vehicle heat exchange system.

These vehicle heat exchange systems have a basic structure in which refrigerant circulates through a compression unit (100), a condensation unit (200), an expansion valve (300), and an evaporation unit (400).

The compression unit (100) can be driven by receiving power from a motor or engine as a power source, and can suck in and compress the low-temperature, low-pressure gaseous refrigerant discharged from the evaporator (400) to create a high-temperature, high-pressure gaseous state and send it to the condensation unit (200).

The condenser (200) condenses the high-temperature, high-pressure gaseous refrigerant discharged from the compression unit (100) into a low-temperature, high-pressure liquid by exchanging heat with an external heat source and sends it toward the expansion valve (300). In addition, the condenser (200) separates the gaseous refrigerant and the liquid refrigerant in a gas-liquid separator so that only the liquid refrigerant can be supplied toward the expansion valve (300). In one embodiment, a water-cooling structure can be used for the condenser (200).

The expansion valve (300) rapidly expands the low-temperature, high-pressure liquid refrigerant discharged from the condenser (200) using a throttle action to create a low-temperature, low-pressure, saturated state and sends it to the evaporator (400). Here, the expansion valve (300) may be formed with an expansion path having an orifice to expand the refrigerant flowing from the condenser (200) toward the evaporator (400), and may be provided with a flow rate control means to control the degree of opening of the orifice to control the flow rate of the refrigerant flowing from the condenser (200) toward the evaporator (400).

The evaporator (400) cools the air being blown into the interior by heat absorption due to the latent heat of vaporization of the refrigerant by exchanging heat between the low-pressure liquid refrigerant condensed in the expansion valve (300) and the air being blown into the interior of the vehicle, thereby evaporating the liquid refrigerant. Then, the low-temperature and low-pressure gaseous refrigerant evaporated in the evaporator (400) is again sucked and compressed through the compression unit (100) to become a high-temperature and high-pressure gaseous state and sent to the condenser (200), and the cycle described above is repeated. At this time, a water-cooled evaporator (400) may also be used as the evaporator (400).

In the present invention, an internal heat exchange unit (500) may be provided to exchange heat between a first line (501) through which refrigerant moves to an expansion valve (300) by moving a condenser (200), and a second line (502) through which refrigerant moves to a compression unit (100) by moving an evaporator (400).

The internal heat exchanger (500) may include a first line tube (520) through which the refrigerant of the first line (501) moves and a second line tube (530) through which the refrigerant of the second line (502) moves. At this time, the refrigerants flowing through the first line tube (520) and the second line tube (530) may move in opposite directions.

This internal heat exchanger (500) can improve the heat exchange efficiency of the heat exchanger by mutually exchanging heat between the low-temperature, high-pressure liquid refrigerant flowing into the expansion valve (300) and the low-temperature, low-pressure gaseous refrigerant discharged from the evaporator (400), thereby supercooling the low-temperature, high-pressure liquid refrigerant before it is throttled in the expansion valve (300) and optimizing the superheating degree of the low-pressure refrigerant discharged from the evaporator (400) and before it flows into the compression unit (100).

The refrigerant that has passed through the internal heat exchanger (500) can move to the compression unit (100). At this time, the accumulator (600) can separate the refrigerant moving to the compression unit (100) into gaseous and liquid refrigerants and supply them to the compression unit (100).

FIG. 3 is a structural diagram of a heat exchanger according to an embodiment of the present invention, FIG. 4 is a perspective view of the embodiment of FIG. 2, FIG. 5 is a cross-sectional view taken along the line A-A` of FIG. 4, and FIG. 6 is a cross-sectional view taken along the line B-B` of FIG. 4.

Referring to FIGS. 3 to 6, a heat exchanger according to an embodiment of the present invention may include a condensing unit (200), an evaporating unit (400), and an internal heat exchange unit (500).

The condenser (200) may include a pair of first header tanks (210), a plurality of first tubes (230), a plurality of first fins (231), and a first housing (250).

The first header tanks (210) are provided as a pair and can form a path through which the high temperature and high pressure gaseous refrigerant compressed in the compression unit (100) moves. The first header tank (210) can form a path through which the refrigerant can move through the header and the tank by brazing welding. The pair of first header tanks (210) are arranged to face each other, and a plurality of insertion holes for inserting the first tube (230) can be formed on one side of the first header tank (210).

The first tube (230) may be formed in an elongated shape, and a plurality of paths may be formed inside for the refrigerant to move. The first tubes (230) may be inserted into the insertion holes of the first header tanks (210) that are arranged to face each other, and may be connected to the paths of the first header tanks (210).

The first fin (231) is provided in multiple numbers and may be arranged between multiple first tubes (230) to increase heat exchange efficiency. The first fin (231) may be provided to have a zigzag or wave-shaped cross-sectional structure and may be arranged so that both sides come into contact with the outer surface of the first tube (230). In one embodiment, the first fin (231) may be a louver fin.

The first housing (250) can form a passage for cooling water to move in the water-cooled condenser (200). The first housing (250) can be provided with a structure that surrounds a plurality of tubes and fins to form a first cooling water movement passage that can move between the first tubes (230) and the space between the first tubes (230).

In one embodiment, the first housing (250) may have a pair of plate-shaped structures that are joined to the sides of a plurality of first tubes (230). The first housing (250) may be joined to both sides of the first tubes (230) through brazing welding to form a coolant passage in the space between the first tubes (230) arranged above and below.

In addition, a first inlet passage (251) and a first outlet passage (253) for cooling water may be arranged in the first housing (250) so as to cross the arrangement direction of the plurality of first tubes (230) and protrude from the surface of the first housing (250). A first inlet port (251a) through which cooling water flows in may be formed on one side of the first inlet passage (251), and a first outlet port (253a) through which cooling water flows out may be formed on one side of the first outlet passage (253).

The first inflow passage (251) and the first outflow passage (253) are provided in a structure that protrudes from the surface of the first housing (250) to form a movement space through which the coolant can move up and down.

This is a structure in which the first housing (250) is brazed and welded to the side of the first tube (230) so that it is difficult for the cooling water flowing through the first cooling water passage to circulate as a whole. To prevent this problem, the first inlet passage (251) and the first outlet passage (253) may be provided with a structure that protrudes upward.

In addition, in order to ensure ease of cooling water circulation, the first inlet passage (251) and the second outlet passage (453) may be arranged on each side of the first housing (250) having a pair of plate-shaped structures. The pair of first inlet passages (251) arranged to face each other can facilitate the distribution of cooling water flowing into the first inlet (251a) formed on one side, and the first outlet passage (253) can also assist the circulation of cooling water.

The first inlet (251a) and the first outlet (253a) can be positioned at different locations.

For example, the first inlet (251a) may be arranged at the upper part of the first inlet passage (251), and the first outlet (253a) may be arranged at the lower part of the second outlet passage (453). However, this structure is not limited to this, and the inlet and outlet of the cooling water circulating through the pump may be arranged at various locations.

The evaporator (400) may include a pair of second header tanks (410), a plurality of second tubes (430) arranged to connect the second header tanks (410), a plurality of second fins (431) arranged between the second tubes (430), and a second housing (450).

The second header tank (410) is provided as a pair and can form a path through which the low-pressure liquid refrigerant reduced by the expansion valve (300) moves.

The second header tank (410) can form a passage through which the header and the tank can move by brazing welding. A pair of second header tanks (410) are arranged to face each other, and a plurality of insertion holes for inserting a second tube (430) can be formed on one side of the second header tank (410).

The second tube (430) may be formed in an elongated shape, and a plurality of paths for the refrigerant to move may be formed inside. The second tubes (430) may be inserted into the insertion holes of the first header tanks (210) that are arranged to face each other, and may be connected to the paths of the second header tanks (410).

The second fin (431) is provided in multiple numbers and may be arranged between multiple second tubes (430) to increase heat exchange efficiency. The second fin (431) may be provided to have a zigzag or wave-shaped cross-sectional structure like the first fin (231), and may be arranged so that both sides come into contact with the outer surface of the first tube (230). In one embodiment, the second fin (431) may be a louver fin.

The second housing (450) can form a passage for the cooling water to move in the evaporator (400). The second housing (450) is provided with a structure that surrounds a plurality of second tubes (430) and second fins (431), and can form a second cooling water movement passage that can move between the second tubes (430) and the space between the second tubes (430).

In one embodiment, the second housing (450) may have a pair of plate-shaped structures that are joined to the sides of a plurality of second tubes (430). The second housing (450) may be joined to both sides of the second tubes (430) through brazing welding to form a second coolant passage in the space between the second tubes (430) arranged above and below.

In addition, a second inlet passage (451) and a second outlet passage (453) for cooling water may be arranged in the second housing (450) so as to cross the arrangement direction of the plurality of second tubes (430) and protrude from the surface of the first housing (250). A second inlet port (451a) through which cooling water flows in may be formed on one side of the second inlet passage (451), and a second outlet port (453a) through which cooling water flows out may be formed on one side of the second outlet passage (453).

The second inflow passage (451) and the second outflow passage (453) are provided in a structure that protrudes from the surface of the second housing (450) to form a movement space through which the coolant can move up and down.

This is a structure in which the second housing (450) is brazed and welded to the side of the second tube (430) so that it is difficult for the cooling water flowing through the second cooling water passage to circulate as a whole. To prevent this problem, the second inlet passage (451) and the second outlet passage (453) can be structured to protrude upward to form a movement space between the second tube (430) and the housing.

In addition, in order to ensure ease of cooling water circulation, the second inlet passage (451) and the second outlet passage (453) may be arranged on each side of the second housing (450) having a pair of plate-shaped structures. The pair of second inlet passages (451) arranged to face each other can facilitate the distribution of cooling water flowing in from the second inlet (451a) formed on one side, and the second outlet passage (453) can also assist the circulation of cooling water.

The second inlet (451a) and the second outlet (453a) can be positioned at different locations.

In one embodiment, the second inlet (451a) may be arranged at the upper portion of the second inlet passage (451), and the second outlet (453a) may be arranged at the lower portion of the second outlet passage (453). However, the present invention is not limited to this structure, and the inlet and outlet of the cooling water circulating through the pump may be arranged at various positions.

The condensing unit (200) and the evaporating unit (400), which are components of the present invention, are composed of a combination of fins and tubes as a basic configuration to increase the heat exchange efficiency of the heat exchanger and reduce component costs.

The internal heat exchanger (500) may include a first line tube (520) through which the refrigerant of the first line (501) moves and a second line tube (530) through which the refrigerant of the second line (502) moves. The first line (501) represents a line through which the refrigerant passing through the condenser (200) moves to the expansion valve (300), and the second line (502) represents a line through which the refrigerant passing through the evaporator (400) moves to the compression unit (100).

The internal heat exchanger (500) is arranged to exchange heat between the refrigerant moving in the condenser (200) and the refrigerant moving in the evaporator (400).

In one embodiment, a heat exchange fin (540) may be placed between the first line tube (520) and the second line tube (530). There is no limitation on the type of the heat exchange fin (540), and it may have various shapes that are placed so that both sides of the first line tube (520) and the second line tube (530) come into contact to perform heat exchange.

In addition, although not shown in the drawing, the first line tube (520) and the second line tube (530) may have a structure for exchanging heat through surface contact. The first line tube (520) and the second line tube (530) may have a form in which the interior of one tube is partitioned to enable heat exchange.

In the present invention, the first header tank (210) and the second header tank (410) can be connected integrally, and the first line tube (520) and the second line tube (530) can be placed between the first header tank (210) and the second header tank (410).

The first header tank (210) and the second header tank (410) can be formed integrally through a connecting portion.

In one embodiment, the first header tank (210), the second header tank (410) and the connecting portion may form a linear passage.

The first line tube (520) and the second line tube (530) can be inserted and fixed on both sides into a connecting portion that is positioned so as to face each other, and the refrigerant moving along the connecting portion can move to the first line tube (520) and the second line tube (530).

In one embodiment, the first line tube (520), the second line tube (530), and the heat exchange fin (540) may be exposed to the outside. The first housing (250) is coupled to the outside of the first tube (230) constituting the condenser (200), and the second housing (450) is coupled to the outside of the second tube (430) constituting the evaporator (400), so that the first line tube (520) and the second line tube (530) may be exposed to the outside.

A plurality of baffles (211, 411) can be arranged inside the first header tank (210) and the second header tank (410). The baffles (211, 411) can control the flow path of the refrigerant moving through the condenser (200) and the evaporator (400).

The shape of the bevels (211, 411) can be formed to be identical to the shape of the internal cross-section of the first header tank (210) and the second header tank (410). In addition, the number of bevels (211, 411) can be modified in various ways depending on the number of channels to be formed.

Referring to FIG. 3, the refrigerant moving from the compression unit (100) flows into the first header tank (210). At this time, the refrigerant moves along multiple paths inside the first header tank (210), and the refrigerant that has passed through the condensation unit (200) moves along the first line tube (520) and flows into the expansion valve (300).

The refrigerant moving through the expansion valve (300) flows into the second header tank (410). The refrigerant flowing into the first header tank (210) moves along the path formed by the baffles (211, 411), and the refrigerant passing through the evaporator (400) moves along the second line tube (530) and moves to the compression unit (100).

The refrigerant flowing into the condenser (200) moves from the top of the condenser (200) to the bottom and passes through the first line tube (520), and the refrigerant flowing into the evaporator (400) moves from the bottom of the evaporator (400) to the top and passes through the second line tube (530).

Through this, the first line tube (520) and the second line tube (530) in the center are arranged adjacent to each other and can exchange heat while having refrigerant flow in opposite directions.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

The above description is merely an illustrative description of the technical idea of the present invention, and those skilled in the art will appreciate that various modifications, changes, and substitutions may be made without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical idea of the present invention but to explain it, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

100 : Compression section 200 : Condensation section
210: 1st Header Tank 211, 411: Bepple
230: 1st tube 231: 1st pin
250: 1st housing 251: 1st inlet passage
251a: First inlet 253: First outlet
253a: First outlet 300: Expansion valve
400: Evaporator 410: Second header tank
430: 2nd tube 431: 2nd pin
450: Second housing 451: Second inlet passage
451a: Second inlet 453: Second outlet
453a: Second outlet 500: Internal heat exchanger
501: Line 1 502: Line 2
510: Connection 520: First line tube
530: 2nd line tube 540: Heat exchange fin
600 : Accumulator

Claims (18)

It includes a first heat exchanger and a second heat exchanger in which the refrigerant moves to exchange heat,
The first line through which the refrigerant moves after exchanging heat in the first heat exchanger and the second line through which the refrigerant moves after exchanging heat in the second heat exchanger each move through the first line tube and the second line tube.
The first line tube and the second line tube are arranged to face each other, and the refrigerant flowing through the first line tube and the second line tube includes an internal heat exchanger that exchanges heat while moving in opposite directions.
The first heat exchanger uses a condensing section, and the second heat exchanger uses an evaporating section.
The above condenser comprises a pair of first header tanks, a plurality of first tubes arranged to connect between the first header tanks, a plurality of first fins arranged between the first tubes, and a first housing.
A heat exchanger comprising: a pair of second header tanks, a plurality of second tubes arranged to connect the second header tanks, a plurality of second fins arranged between the second tubes, and a second housing. In the first paragraph,
A heat exchanger characterized in that a heat exchange fin is arranged between the first line tube and the second line tube of the internal heat exchange section. In the first paragraph,
A heat exchanger, characterized in that the first line tube and the second line tube of the internal heat exchanger exchange heat through surface contact. delete In the first paragraph,
A heat exchanger characterized in that the inner wall of the first housing is brazed to both sides of a plurality of the first tubes to form a plurality of first cooling water movement passages. In clause 5,
A heat exchanger characterized in that the first housing is arranged such that a first inlet passage and a first outlet passage for cooling water protrude from the surface of the first housing and extend across the arrangement direction of the plurality of first tubes. In the first paragraph,
A heat exchanger characterized in that the inner wall of the second housing is brazed to both sides of a plurality of second tubes to form a plurality of second cooling water movement passages. In Article 7,
A heat exchanger characterized in that the second housing is arranged such that a second inlet passage and a second outlet passage for cooling water protrude from the surface of the second housing and extend across the arrangement direction of the plurality of second tubes. In the first paragraph,
The above first header tank and the above second header tank are connected as one unit,
A heat exchanger, characterized in that the first line tube and the second line tube are arranged between the first header tank and the second header tank. In Article 9,
The above first header tank and the above second header tank form a linear passage,
A heat exchanger characterized in that a plurality of baffles are arranged inside the first header tank and the second header tank to control the flow path of the refrigerant. In Article 10,
A heat exchanger characterized in that the refrigerant flowing into the first header tank moves from the top to the bottom of the condensing section, and the refrigerant flowing into the second header tank moves from the bottom to the top of the evaporating section. A water-cooled condenser in which refrigerant moves through a plurality of first tubes arranged in one direction;
A water-cooled evaporator in which refrigerant moves through a plurality of second tubes arranged in the above one-sided direction;
Including an internal heat exchanger for exchanging heat between the refrigerant passing through the water-cooled condenser and the refrigerant passing through the water-cooled evaporator.
The above water-cooled condenser, the above water-cooled evaporator, and the above internal heat exchanger share a pair of header tanks,
The water-cooled condenser comprises a first housing enclosing a plurality of the first tubes, and the water-cooled evaporator comprises a second housing enclosing a plurality of the second tubes.
A heat exchanger characterized in that the temperature of the refrigerant is controlled by cooling water moving inside the first housing and the second housing. delete In Article 12,
A heat exchanger characterized in that an inlet passage and an outlet passage for the cooling water to move are respectively arranged in the first housing and the second housing. In Article 12,
The above pair of header tanks are provided with a straight pipe structure.
A heat exchanger, characterized in that the internal heat exchanger is disposed between the water-cooled condenser and the water-cooled evaporator. In Article 15,
A heat exchanger characterized in that a plurality of baffles are arranged inside the header tank to form a flow path. In Article 12,
The internal heat exchanger has a first line through which the refrigerant moves from the water-cooled condenser to the expansion valve and a second line through which the refrigerant moves from the water-cooled evaporator to the compression unit, each of which moves through the first line tube and the second line tube.
A heat exchanger characterized in that the first line tube and the second line tube are arranged to face each other, and the refrigerant flowing through the first line tube and the second line tube moves in opposite directions to exchange heat. In Article 17,
A heat exchanger characterized in that heat exchange fins are arranged between the first line tube and the second line tube.

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