CN106918165B

CN106918165B - Heat exchanger

Info

Publication number: CN106918165B
Application number: CN201510995336.0A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2015-12-25
Filing date: 2015-12-25
Publication date: 2020-06-16
Anticipated expiration: 2035-12-25
Also published as: CN106918165A

Abstract

The invention discloses a heat exchange device, which comprises a heat exchanger core, a valve component and a first interface, wherein the heat exchanger core is provided with a first port and a second port; the plate sheets comprise a first plate sheet, a second plate sheet and a third plate sheet, the third plate sheet comprises a first blocking part and a second hole, the first blocking part is positioned at the position corresponding to the first hole of each plate sheet, the first holes of the first plate sheet and the second plate sheet are aligned to form a first hole channel, the first hole channel is divided into at least two sub-hole channels by the first blocking part, and each sub-hole channel of the first hole channel is communicated with the adjacent sub-hole channel through the second hole channel; the first circulation channel is divided into at least two heat exchange sections by the third plate, and the flow directions of fluids in the adjacent heat exchange sections are opposite; the valve assembly is located between the first port and the first hole, the first circulation area of the valve assembly is located outside the heat exchanger core and communicated with the first port, and the second circulation area of the valve assembly is communicated with the first hole. The invention has small overall dimension, better vibration resistance and better heat exchange performance.

Description

Heat exchanger

Technical Field

The invention relates to the technical field of heat exchange.

Background

Batteries of electric vehicles generate heat when in operation and need to be cooled, and cooling by using a cooling liquid is a common way. The common battery cooling device comprises a heat exchanger and an expansion valve, wherein a liquid refrigerant enters the heat exchanger after passing through the throttling action of the expansion valve, the refrigerant is cooled after evaporation, the cooled refrigerant flows to a battery pack to dissipate heat of the battery, and the temperature of the refrigerant after flowing through the battery pack is increased and needs to return to the heat exchanger for cooling. Similar to the principle, these refrigeration devices are widely used in automobile air conditioners, heat pump units, multi-split air conditioners, motor thermal management, and the like. Typically, refrigerant flows through the expansion valve and two liquids, a refrigerant and a coolant, flow through the heat exchanger. The refrigerant passes through the expansion valve to generate throttling, and enters the heat exchanger in a vapor-liquid two-phase state when coming out of the valve.

The existing heat exchanger and expansion valve are separate components and are connected by a pipeline. The heat exchanger and the valve have a larger distance, and the refrigerant in a vapor-liquid two-phase state can generate the change of a flowing state between the heat exchanger and the valve, such as vapor-liquid layering, which will influence the refrigeration effect. In addition, pipeline materials are added, so that the vibration resistance of the whole assembly is poor, and phenomena such as pipeline fracture and the like are easy to occur.

Disclosure of Invention

The invention aims to provide a heat exchange device with small overall dimension, good vibration resistance and good heat exchange performance.

In order to realize the purpose, the following technical scheme is adopted:

a heat exchange device comprises a plurality of stacked plates, wherein each plate comprises a plurality of first plates and a plurality of second plates, the plates are stacked to form a first circulation channel and a second circulation channel, and the first circulation channel is not communicated with the second circulation channel;

the heat exchange device comprises a heat exchanger core, a valve assembly and a connecting channel;

the plate further comprises at least one third plate, the heat exchanger core comprises the first plate, the second plate and the third plate which are arranged in a stacked mode, the first plate comprising a first aperture, a second aperture, the second plate also comprising a first aperture, a second aperture, the third plate comprises a first blocking part and a second hole, the first blocking part is positioned at the position corresponding to the first hole of the first plate or the second plate, the first porthole of the first plate and the first porthole of the second plate are stacked to form a first porthole, the second porthole of the first plate, the second porthole of the second plate and the second porthole of the third plate are stacked to form a second porthole, the first pore passage and the second pore passage are part of the first flow passage, the first pore passage is divided into at least two sub-pore passages by the first blocking part, and each sub-pore passage of the first pore passage is communicated with the adjacent sub-pore passage through the second pore passage; the first circulation channel is divided into at least two heat exchange sections through the third plate, and the flow directions of fluids in adjacent heat exchange sections are opposite;

the valve assembly and the first interface are located on the same side of the heat exchanger core, the valve assembly comprises a first circulation area, a throttling area and a second circulation area, the first circulation area is located outside the heat exchanger core and communicated with the first interface, the second circulation area is communicated with the first hole channel, and the throttling area is located between the first circulation area and the second circulation area.

The valve assembly includes a valve seat portion including a first opening in communication with the first flow-through region and a second opening in communication with the second flow-through region, the second opening having an inner diameter smaller than an inner diameter of the first orifice;

the heat exchange device also comprises a mounting plate and a connecting channel, and the mounting plate and the valve assembly are positioned on the same side of the heat exchanger core; the connecting channel is formed between the mounting plate and the heat exchanger core, and the connecting channel is communicated with the first interface and the first circulation area.

The valve module still includes the case subassembly, the valve seat portion include installation department, location portion and be formed at this valve seat portion middle part position and with the through hole that first pore is linked together, the case subassembly stretches into the through hole and with the installation department equipment is fixed, location portion includes protruding section and spacing segment, the protruding section of location portion stretches into in the first pore, just protruding section external diameter is less than the internal diameter in first pore, the spacing segment of location portion is located the heat exchanger core is outside, the spacing segment with form between the installation department first opening, the spacing segment is kept apart link channel with first pore.

The valve seat part is assembled and fixed with the mounting plate, the mounting plate comprises a positioning hole for fixing the valve seat part, the position of the positioning hole corresponds to the first duct, and the valve seat part extends into the first duct from the positioning hole;

or the valve seat portion is a part of the mounting plate; the valve seat portion protruding in the mounting panel plane, the installation department is located the front of mounting panel, location portion is located the reverse side of mounting panel, wherein the reverse side of mounting panel is the orientation the one side of heat exchanger core.

The first interface is located the mounting panel link up the mounting panel, the mounting panel is still including the spread groove, the spread groove is located the reverse side of mounting panel, the spread groove certainly first interface extends to the first opening of valve seat portion, the spread groove with form between the heat exchanger core interface channel, wherein the reverse side of mounting panel is the orientation the one side of heat exchanger core.

The heat exchanger core comprises a top plate and a bottom plate, the top plate and the bottom plate are positioned on two sides of the heat exchanger core, the top plate and the mounting plate are stacked, and the bottom plate is positioned on one side, far away from the mounting plate, of the heat exchanger core;

the protruding section is located between the top plate and the bottom plate, and the distance between the end of the protruding section and the third plate is smaller than the distance between the third plate and the bottom plate; the isolation segment is located between the top plate and the mounting plate, and the isolation segment is adjacent to the connecting channel.

The plate further comprises at least one fourth plate, the heat exchanger core comprises the fourth plate, the fourth plate comprises a first hole and a second blocking portion, the second blocking portion is located at a position corresponding to the fourth plate and second holes of the first plate, the second plate and the third plate, the first plate, the second plate and the fourth plate are stacked, so that the first hole of the first plate, the first hole of the second plate and the first hole of the fourth plate are aligned to form a first hole channel, the first plate, the second plate and the third plate are stacked, so that the second hole of the first plate, the second hole of the second plate and the second hole of the third plate are aligned to form a second hole channel, the first hole channel is divided into at least two sub-hole channels by the first blocking portion, and the second hole channel is divided into at least two sub-hole channels by the second blocking portion, each sub-orifice of the first orifice is communicated with an adjacent sub-orifice through the second orifice, and each sub-orifice of the second orifice is communicated with an adjacent sub-orifice through the first orifice; the first flow channel is divided into a plurality of heat exchange sections by the third plate and the fourth plate, and the flow directions of fluids in the adjacent heat exchange sections are opposite.

The heat exchange device also comprises a second interface; the first interface and the second interface are positioned on different sides of the heat exchanger core, the first interface and the valve assembly are positioned on one side of the heat exchanger core, the second interface is positioned on the other side of the heat exchanger core, and a fluid channel is arranged between the first interface and the second interface;

the plate sheet comprises a first plate sheet, a second plate sheet and a third plate sheet, the heat exchange section comprises a first heat exchange section and a second heat exchange section, and the second interface is communicated with the sub-hole passage of the first hole passage far away from the valve assembly; the fluid passage comprises the connecting passage, the first flow-through region, the throttle region, the second flow-through region, a sub-passage of the first passage adjacent to the valve assembly, the first heat exchange section, the second passage, the second heat exchange section, a sub-passage of the first passage remote from the valve assembly;

or the plate sheets comprise a first plate sheet, a second plate sheet, a third plate sheet and a fourth plate sheet, the heat exchange section comprises a first heat exchange section, a second heat exchange section and a third heat exchange section, and the second interface is communicated with a sub-pore passage on one side of the heat exchanger core body, away from the valve assembly, of the second pore passage; the fluid passage comprises the connecting passage, the first circulation area, the throttling area, the second circulation area, a sub-hole passage of which the first hole passage is adjacent to the valve assembly, the first heat exchange section, a sub-hole passage of which the second hole passage is adjacent to one side of the heat exchanger core of which the valve assembly is arranged, the second heat exchange section, a sub-hole passage of which the first hole passage is far away from the valve assembly, the third heat exchange section and a sub-hole passage of which the second hole passage is far away from one side of the heat exchanger core of which the valve assembly is arranged.

The heat exchange device also comprises a first external connecting pipe and a second external connecting pipe, and the first external connecting pipe is communicated with the first interface; the first external connecting pipe, the second external connecting pipe and the valve assembly are positioned on the same side of the heat exchanger core, and a fluid channel is formed between the first external connecting pipe and the second external connecting pipe;

the outer diameter of the second external connecting pipe is smaller than the inner diameter of the second pore passage, one end of the second external connecting pipe extends into a sub-pore passage which is arranged in the second pore passage and is adjacent to one side of the heat exchanger core body where the valve assembly is arranged, a through hole is further formed in the second blocking part of the fourth plate, the pipe orifice of the second external connecting pipe is communicated with the through hole, and the pipe wall of the second external connecting pipe is fixed with the second blocking part in a sealing mode; the fluid passage comprises the connecting passage, the first circulation area, the throttling area, the second circulation area, a sub-hole passage of which the first hole passage is adjacent to the valve assembly, the first heat exchange section, a sub-hole passage of which the second hole passage is adjacent to one side of the heat exchanger core of which the valve assembly is arranged, the second heat exchange section, a sub-hole passage of which the first hole passage is far away from the valve assembly, the third heat exchange section and a sub-hole passage of which the second hole passage is far away from one side of the heat exchanger core of which the valve assembly is arranged.

The end part of the second outer connecting pipe extending into the second pore passage comprises a flange, and the flange is provided with a matching part; the flange of the second outer connecting pipe extends into the through hole, the matching part is fixed with the reverse side of the second blocking part at the periphery of the through hole in a sealing way or the flange of the second outer connecting pipe does not extend into the through hole, and the matching part is fixed with the front side of the second blocking part at the periphery of the through hole in a sealing way; the reverse side of the second blocking part is the side, back to the heat exchanger core body where the valve component is located, and the front side of the second blocking part is the side, facing the heat exchanger core body where the valve component is located;

or the second blocking part comprises a flange, the flange of the second blocking part is positioned at the periphery of the through hole, and the flange of the second blocking part is provided with a matching part; the second outer connecting pipe extends into the through hole, and the matching part is fixed with the outer wall of the second outer connecting pipe in a sealing way; or the second outer connecting pipe does not extend into the through hole, and the matching part is fixed with the inner wall of the second outer connecting pipe in a sealing mode.

According to the technical scheme, the valve assembly and the heat exchanger core body are directly integrated, so that a long pipeline required by connection of the valve assembly and the heat exchange device is omitted, the first circulation channel is separated through the third plate sheet to increase a flow path, and therefore the heat exchange device has good heat exchange performance and meets the required requirements under the condition of small overall dimension.

Drawings

FIG. 1 is a schematic perspective view of one embodiment of a heat exchange device;

FIG. 2 is a side view of a mounting plate of the heat exchange device of FIG. 1;

FIG. 3 is a schematic view of a cut-away partial perspective structure of the heat exchanger shown in FIG. 1;

FIG. 4 is a schematic partial perspective view of another embodiment of a heat exchange device;

FIG. 5 is a schematic view of one of the plates of the heat exchange device of FIG. 1;

FIG. 6 is an enlarged view of part A of FIG. 3;

FIG. 7 is a schematic partial perspective view of another embodiment of a heat exchange device;

FIG. 8 is a schematic view of the fixing manner of the second external connection tube and the second blocking portion of the heat exchange device shown in FIG. 2;

FIG. 9 is a schematic view of the fixing manner of the second external connection tube and the second blocking portion of the heat exchange device shown in FIG. 2;

FIG. 10 is a schematic view of the fixing manner of the second external connection tube and the second blocking portion of the heat exchange device shown in FIG. 2;

FIG. 11 is a schematic view of the fixing manner of the second external connection tube and the second blocking portion of the heat exchange device shown in FIG. 2;

FIG. 12 is a schematic side view of the heat exchange device of FIG. 1 with two plates stacked;

FIG. 13 is a schematic view of yet another embodiment of a plate;

fig. 14 is a partially enlarged view of C in fig. 13.

Detailed Description

Referring to fig. 1, fig. 1 is a schematic perspective view of an embodiment of a heat exchange device.

The heat exchanging apparatus 100 includes a heat exchanger core 11, a valve assembly 12, a mounting plate 13, a top plate (not shown), a bottom plate 14, a first extension pipe 15, a second extension pipe 16, a third extension pipe 17, and a fourth extension pipe 18. The heat exchanger core 11 is abutted by a top plate and a bottom plate 14 on both sides, and the mounting plate 13 is abutted by the top plate. Referring to fig. 2, the mounting plate 13 includes a plurality of mounting holes 132, a first through hole 137 for fixedly mounting the first extension pipe 15, a second through hole 133 for fixedly mounting the second extension pipe 16, a third through hole (not shown) for fixedly mounting the third extension pipe 17, and a fourth through hole (not shown) for fixedly mounting the fourth extension pipe 18. A connection port of the first external connection pipe 15 of the heat exchange device 100 and the heat exchange device is a first interface, a connection port of the second external connection pipe 16 and the heat exchange device is a second interface, the first interface shown in the figure is a first through hole 137, the second interface shown in the figure is a second through hole 133, the valve assembly 12 is connected between the first interface and the heat exchanger core, a connection channel 151 (see fig. 3) is arranged between the first interface and the valve assembly 12, and a fluid channel is arranged between the first external connection pipe and the second external connection pipe. The mounting plate 13 further includes a coupling groove 134, the coupling groove 134 being located at an opposite side of the mounting plate 13 and extending from the first through hole 137 to the valve assembly 12, the coupling groove 134 being used to form a coupling passage 151. Wherein the reverse side of the mounting plate is the side facing the heat exchanger core 11. It should be appreciated that no connecting passage may be provided between the first port and the valve assembly and the first port may be located directly on the valve assembly.

To more clearly understand the internal structure of the heat exchanger core, please refer to fig. 3 and fig. 4, fig. 3 is a partial perspective cross-sectional view of the heat exchange device 100, and fig. 4 is a partial perspective cross-sectional view of the heat exchange device 100'. The heat exchanger core 11 comprises a plurality of stacked plates, and each plate comprises a plurality of first plates 111, a plurality of second plates 112 and at least one third plate 113; the first plate 111 and the second plate 112 are stacked to form a first flow channel and a second flow channel, except for the two plates closest to the edge, two sides of the plurality of plates are respectively the first flow channel and the second flow channel, for example, one of the first plate and the two second plates adjacent to the first plate form the first flow channel, the first plate and the other second plate form the second flow channel, and the first flow channel and the second flow channel are not communicated. The first plate 111 and the second plate 112 each comprise a first porthole 23, a second porthole 24, a third porthole 25 and a fourth porthole 26, the first portholes 23 on each plate are aligned to form a first channel, the second portholes 24 on each plate are aligned to form a second channel, the third portholes 25 on each plate are aligned to form a third channel, and the fourth portholes 26 on each plate are aligned to form a fourth channel. The first pore passage and the second pore passage of the heat exchanger core are communicated with the first circulation passage, and the third pore passage and the fourth pore passage of the heat exchanger core are communicated with the second circulation passage. The third plate 113 includes a first blocking portion 19a and a second orifice 24, the second orifice 24 of the third plate 113 is aligned with the second orifice 24 of the first plate 111 and the second orifice 24 of the second plate 112 to form a second hole channel, the first blocking portion 19a is located at a position corresponding to the first orifice 23 of the third plate, the first hole channel of the heat exchanger core 11 is partitioned by the first blocking portion 19a to form at least two sub-hole channels, the first flow channel is partitioned into at least two heat exchange sections by the third plate 113, the heat exchange sections include a first heat exchange section 101 and a second heat exchange section 102, the first heat exchange section 101 is communicated with one end of the first flow channel, the second heat exchange section 102 is communicated with the other end of the first flow channel, and the flow directions of the first heat exchange section 101 and the second heat exchange section 102 are opposite. The heat exchanger core is divided into at least two heat exchange sections through the first blocking portion, and the flow path of fluid is increased under the condition that the structure of the heat exchange device is kept small, so that the superheat degree of refrigerant at the outlet of the heat exchange device meets certain requirements, and the heat exchange device has good heat exchange performance.

As another embodiment, referring to fig. 3, the heat exchanger core 11 may further include at least one fourth plate 114, the structure of the fourth plate 114 may be mostly referred to the first plate 111 and the second plate 112, the fourth plate 114 further includes a second blocking portion 19b and a first port 23, the first port 23 of the fourth plate 114 is aligned with the first port 23 of the first plate 111 and the first port 23 of the second plate 112 to form a first hole channel, and the second hole channel of the heat exchanger core 11 is separated by the second blocking portion 19b of the fourth plate 114 to form at least two sub-hole channels. The third plate sheet 113 and the fourth plate sheet 114 are located in the middle area of the heat exchanger core body or are both arranged at a certain distance from the top plate or the bottom plate, and divide the first circulation channel into three heat exchange sections, each heat exchange section comprises a first heat exchange section 101, a second heat exchange section 102 and a third heat exchange section 103, the first heat exchange section 101 is communicated with one end of the first circulation channel, the third heat exchange section 103 is communicated with the other end of the first circulation channel, the second heat exchange section 102 is located between the third plate sheet 113 and the fourth plate sheet 114, the flow direction of fluid in the first heat exchange section 101 is opposite to the flow direction of fluid in the second heat exchange section 102, and the flow direction of fluid in the second heat exchange section 102 is opposite to the flow direction of fluid in the third heat exchange section 103. The third plate and the fourth plate are additionally arranged in the heat exchanger core body to divide the first circulation channel into at least three heat exchange sections, so that the flow path of the fluid is effectively increased under the condition that the structure of the heat exchange device is smaller, the superheat degree of a refrigerant at the outlet of the heat exchange device is ensured to meet certain requirements, and the heat exchange device has better heat exchange performance.

The first plate 111 and the second plate 112 are substantially the same structure. For the convenience of understanding, only one of the first plate or the second plate 20 will be described in detail, as shown in fig. 5, the plate 20 has an approximately square structure, the plate 20 includes a plate plane 21 and a flange 22, and the flange 22 is located on the periphery of the plate plane 21. The first and

second apertures

23 and 24 are formed in two of the plate plane 21 at positions near the corners, and two bosses 231 protruding from the plate plane 21 by a certain height are formed in the other two of the plate plane 21 at positions near the corners. A third orifice 25 and a fourth orifice 26 are formed on the boss 231. The first aperture 23 and the second aperture 24 may be located on the same side or on diagonal sides of the plate. The third aperture 25 and the fourth aperture 26 may likewise be located on the same side or on diagonal sides of the plate 20. When the adjacent plates are stacked together, a part of the flanging between the first plate and the second plate is tightly abutted with each other.

With combined reference to fig. 2 and 6, the valve assembly 12 and the first port are located on the same side of the core, the valve assembly 12 includes a first flow-through region 121, a throttle region 123 and a second flow-through region 122, the first flow-through region 121 is located outside the core 11 and is communicated with the first port, the second flow-through region 122 is communicated with the first port, specifically, the second flow-through region 122 may be located in the first port directly or the second flow-through region 122 is located above the first port, and the throttle region 123 is located between the first flow-through region 121 and the second flow-through region 122. The valve assembly 12 comprises a valve core assembly 120 and a valve seat portion 131, wherein the valve core assembly 120 is in sealing fit with the valve seat portion 131; the valve seat portion 131 includes a first opening 131c communicating with the first flow-through region 121 and a second opening 131d communicating with the second flow-through region, the second opening 131d having an inner diameter smaller than that of the first hole passage, and a connection groove of the mounting plate extending from the first port to the first opening to communicate the connection passage with the first flow-through region; the valve seat 131 further includes a mounting portion 131a, a positioning portion 131b and a through hole 138 formed in the middle of the valve seat and communicated with the first bore, the valve core assembly 120 extends into the through hole 138 and is assembled and fixed with the mounting portion 131a, the positioning portion 131b includes a protruding section 131b2 and a separating section 131b1, the protruding section 131b2 of the positioning portion 131b is located between the top plate and the bottom plate, the end of the protruding section 131b2 is located in the first bore, the outer diameter of the protruding section 131b2 is smaller than the inner diameter of the first bore, and the distance between the end of the protruding section 131b2 and the third plate is smaller than the distance between the third plate and the bottom plate. The partition section 131b1 of the positioning portion 131b is located outside the core, the partition section 131b1 is located between the top plate and the mounting plate, in particular, and the partition section 131b1 is close to the connection channel 151, a first opening 131c is formed between the partition section 131b1 and the mounting portion 131a, and the partition section 131b1 partitions the connection channel 151 and the first porthole. The convex section 131b2 is positioned in the first hole passage, so that the path of the refrigerant entering the first circulation passage can be shortened, and the gas-liquid separation of the refrigerant passing through the valve assembly in a longer pipeline is prevented; the isolating section 131b1 isolates the connecting passage from the first port, preventing refrigerant from directly entering the first port without passing through the valve assembly; in addition, when the refrigerant enters the heat exchanger core, most of the refrigerant is liquid, the density of the liquid is far greater than that of the gas, and in order to prevent the rapid expansion and the rapid increase of the flow rate after the refrigerant is gasified, the distance between the convex section 131b2 and the third plate is small, so that the flow rate of the gas can be reduced, and a better heat exchange effect can be achieved.

Specifically, the valve core assembly 120 and the valve seat portion 131 may be assembled and fixed, for example, a portion of the valve core assembly is in threaded fit with the mounting portion 131a of the valve seat portion 131, specifically, a portion of the inner wall 135 of the through hole of the valve seat portion 131 at the position of the mounting portion 131a is provided with a threaded interface portion, and a portion of the outer wall of the valve core assembly is provided with a threaded portion which is matched with the threaded interface portion, so as to achieve the assembling and fixing of the two. The valve core assembly 120 further comprises a valve needle and an orifice, the valve needle and the orifice cooperate to form an orifice area 123, the orifice area 123 is located between the first flow area 121 and the second flow area 122, the orifice area 123 can communicate the first flow area 121 and the second flow area 122, the size of the orifice area 123 is variable, the flow rate of the fluid in the second flow area 122 is controlled by the size of the orifice area 123, and the size of the orifice area is determined by the positions of the valve needle and the orifice. The valve assembly 12 may be an electronic expansion valve, and the electronic expansion valve may move the valve needle according to the working condition, so as to automatically adjust the size of the throttling area, thereby realizing automatic change of the flow rate. The first flow area 121 may be plural to facilitate fluid flow from the connecting passage into the valve assembly. Sealing rings are provided between the valve assembly 12 and the mounting portion 131a and between the valve assembly 12 and the positioning portion 131b to ensure sealing between the passages. The valve component and the heat exchanger core are directly integrated together, so that a second circulation area of the valve component is directly positioned in a first pore channel of the heat exchanger core, the valve component and the heat exchanger core are not connected by a pipeline, the refrigerant throttled by the valve component directly enters the heat exchanger core, and the phenomenon that the refrigerant in a gas-liquid two-phase state after throttling has a change of a flowing state in a longer pipeline, such as vapor-liquid stratification, so that the heat exchange effect is influenced is avoided; in addition, the vibration resistance of the whole heat exchange device is favorably enhanced, and the service life of the heat exchange device is prolonged.

Referring to fig. 2, the valve seat portion 131 is a part of the mounting plate 13; the valve seat 131 protrudes from the plane of the mounting plate 13, the mounting portion 131a is located on the front side of the mounting plate, the positioning portion 131b is located on the back side of the mounting plate, the positioning portion 131b extends into the first duct, the connecting channel 151 and the first duct are isolated by the positioning portion 131b, and the outer diameter of the positioning portion 131b is smaller than the inner diameter of the first duct. As another embodiment, the valve seat portion 131 is fixed to the mounting plate 13 in an assembled manner, the mounting plate 13 includes a positioning hole for fixing the valve seat portion 131, the positioning hole is located corresponding to the first duct, and the valve seat portion 131 extends from the positioning hole into the first duct; the positioning portion 131b of the valve seat portion 131 isolates the connection passage 151 and the first bore, and the outer diameter of the positioning portion 131b is smaller than the inner diameter of the first bore. The valve seat portion and the mounting plate are arranged in a split mode or integrally, different manufacturing and mounting requirements can be met, the outer diameter of the positioning portion is smaller than the inner diameter of the first pore channel, fluid can flow back into the plate channel blocked by the positioning portion after flowing out of the second circulation area of the valve assembly, and waste of the plate channel is avoided.

The third plate and the fourth plate in the above embodiments are square structures with approximately the same size as the first plate and the second plate, most of the structures can refer to the first plate and the second plate, the third plate and the fourth plate are located in approximately the middle area of the heat exchanger core, the third plate and the fourth plate also include a plate plane 21, a flange 22 and a boss 231, the boss 231 protrudes from the plate plane 21 by a certain height, the boss 231 is located in two corners of the plate plane 21, the first orifice 23 of the third plate 113 and the second orifice 24 of the fourth plate 114 can be located in the boss or the plate plane, and similarly, the first blocking portion 19a and the second blocking portion 19b can also be located in the boss or the plate plane, and the boss 231 includes a convex surface protruding from the plate plane 21 and a concave surface opposite to the convex surface. The first blocking portion 19a and the second blocking portion 19b may be a part of the third plate 113 or the fourth plate 114, or may be welded and fixed with a plate plane of the third plate 113 or the fourth plate 114 or a concave surface of a boss.

In order to meet the installation requirement, the first external connecting pipe and the second external connecting pipe can be positioned on the same side or different sides of the heat exchanger core. Referring to fig. 4 and 7, fig. 7 is a partial perspective cross-sectional schematic view of a heat exchange device 100 ". A fluid channel is formed between the first external connecting pipe and the second external connecting pipe, and the first external connecting pipe 15 and the second external connecting pipe 16 are located on different sides of the heat exchanger core 11. Specifically, as shown in fig. 4, the first external connection pipe 15 is assembled and fixed with the first through hole of the mounting plate 13, the second external connection pipe 16 corresponds to the first hole, and the second external connection pipe 16 is assembled and fixed with the bottom plate; the fluid passages include a connecting passage 151, a first flow-through region 121, a throttle region 123, a second flow-through region 122, a first port adjacent to a sub-port of the mounting plate, a first heat exchange section 101, a second port, a second heat exchange section 102, a first port adjacent to a sub-port of the base plate. Or as shown in fig. 7, the first external connecting pipe 15 is assembled and fixed with the first through hole of the mounting plate 13, the second external connecting pipe 16 corresponds to the second hole, and the second external connecting pipe 16 is assembled and fixed with the base plate 14, the fluid channel includes a connecting channel 151, a first flow-through region 121, a throttling region 123, a second flow-through region 122, a sub-hole of the first hole adjacent to the mounting plate, a first heat exchanging section 101, a sub-hole of the second hole adjacent to the mounting plate, a second heat exchanging section 102, a sub-hole of the first hole adjacent to the base plate, a third heat exchanging section 103, and a sub-hole of the second hole adjacent to the base plate.

Referring back to fig. 3, the first and

second extension tubes

15, 16 are located on the same side of the heat exchanger core 11. Specifically, the first external connecting pipe 15 and the second external connecting pipe 16 are assembled and fixed with the mounting plate 13; the second blocking portion 19b of the fourth plate 114 is further provided with a through hole 191, the outer diameter of the second external connection pipe 16 is smaller than the inner diameter of the second hole channel, one end of the second external connection pipe 16 extends into the second hole channel and is relatively far away from the sub-hole channel 110 of the mounting plate 13, and the second external connection pipe 16 and the second blocking portion 19b are fixed in a sealing manner, so that a second interface of the second external connection pipe 16 is communicated with the through hole 191 of the second blocking portion. The second outer pipe 16 is secured to the second barrier, for example by welding, to isolate fluid in the second outer pipe from the sub-ports of the mounting plate adjacent the second port. Several welding methods of the second external connection tube 16 and the second blocking portion are listed below, but not limited thereto. As shown in fig. 8 and 9, the end of the second outer connecting tube 16 extending into the second hole includes a flange 161 having a fitting portion; the flange of the second external connection pipe 16 extends into the through hole 191, the matching part is fixed with the reverse side of the second blocking part at the periphery of the through hole 191 in a sealing way, or the flange of the second external connection pipe 16 does not extend into the through hole, and the matching part is fixed with the front side of the second blocking part at the periphery of the through hole in a sealing way. Or as shown in fig. 10 and 11, the second blocking portion 19b further includes a flange 161, the flange 19b1 of the second blocking portion 19b is located at the periphery of the through hole 191, and the flange of the second blocking portion has a matching portion; the second external connecting pipe 16 extends into the through hole, and the matching part is fixed with the outer wall of the second external connecting pipe 16 in a sealing way; or the second external connecting pipe 16 does not extend into the through hole, and the matching part is sealed and fixed with the inner wall of the second external connecting pipe 16. The reverse side of the second blocking part faces the bottom plate, and the front side faces the mounting plate.

The plate structure may include other structures besides the above embodiments, for example, five holes are provided on the plate to facilitate the arrangement of the first external connection pipe and the second external connection pipe on the same side of the heat exchange device.

In order to increase the turbulence capability between the plates, the turbulence capability can be increased by providing corrugated bulges or concave-convex pits or other structures on the plates. For example, the plate comprises a main heat exchange area located in the middle area of the plate plane, the main heat exchange area of the plate is formed with corrugated protrusions respectively protruding from the plate planes of the first plate, the second plate and the third plate, taking the plate shown in fig. 5 as an example, the main heat exchange area of the plate 20 is formed with a plurality of corrugated protrusions 27 protruding from the plate plane 21 by a certain distance, and correspondingly, the reverse side of the plate 20 is formed with pits recessed from the plate plane by a certain distance. Further, the corrugated protrusion 27 is a single herringbone corrugated protrusion including a bent portion 28, and the herringbone corrugated protrusion 27 extends to the intersection of the plate plane 21 and the turned-over edge 22, so that the fluid disturbed by the corrugated protrusion can be dispersed to the edge of the plate as much as possible, thereby enlarging the heat exchange area formed between two adjacent plates 20 and enabling the fluid to flow uniformly at the edge portion of the plate, so as to improve the heat exchange performance of the heat exchange device. The chevron-shaped corrugated projections 27 are arranged at a distance from each other, and a plate plane 21 through which a fluid flows is formed between the chevron-shaped corrugated projections 27. Further, the pitch between the chevron-shaped corrugated protrusions of the main heat exchange area is substantially the same, the width of the chevron-shaped corrugated protrusions 27 is substantially the same, and the height of the protrusions of the corrugated protrusions 27 from the plate plane 21 is the same as the height of the protrusions 231 from the plate plane 21. Referring to FIG. 12, the height h of the corrugated protrusions 27 is 0.9mm or less, for example, the height of the corrugated protrusions is in the range of 0.6 to 0.9 mm. The period of the corrugation protrusions 27 is m, the corrugation period means that the corrugation is repeated once every distance m, the period m is less than or equal to 8mm, and more specifically, the corrugation density (i.e. corrugation protrusion height/period) k is less than 0.15. Two important parameters, namely the heat exchange performance and the flow resistance, can be balanced by the constraint of two conditions, namely the height of the corrugated bulges and the period. The corrugation meeting the above requirements can be called shallow and dense corrugation, so that enough contact points and contact areas can be formed between two plates, and the burst pressure of a heat exchanger formed by stacking the plates can reach more than 5 Mpa. In addition, the shallow and dense corrugations can divide the fluid into more fine and more branch flows in the channel, so that the distribution uniformity of the fluid in the fluid channel is improved, and the fluid distribution is particularly suitable for single-side flows, namely the first orifice and the second orifice are positioned on the same side. In addition, the shallow-dense corrugated plate is convenient to process and easy to stamp, and effectively avoids the increase of the stamping thinning rate caused by overlarge height of the corrugated bulge, so that the condition of internal leakage caused by poor pressure bearing capacity of the heat exchange device is avoided. The heat exchanger has the shallow dense corrugation, which is favorable to improve the uneven distribution of fluid, raise the heat exchange performance and make the gas in the outlet of the evaporator possess certain superheat degree.

As another embodiment, referring to fig. 13 and 14, taking the plate 20 'as an example, the structure of the plate 20' mostly refers to the plate 20, wherein the platform 29 is formed in the middle area between the two herringbone edges of the herringbone corrugated bulges 27, and the width d of the platform area 29 ranges from 0.2 mm to 2mm, and may be 1 mm. The platform area 29 at the wave crest of the corrugated bulge 27 can ensure that the contact position of two plates is in surface contact when the plates are laminated so as to ensure larger contact area between the plates, ensure the strength of welding spots in the welding process of the plates and ensure higher bursting pressure of the heat exchange device. It should be appreciated that the chevron type corrugations are not limited to the single chevron type mentioned above, but may be two or more chevron type corrugations, or other types of corrugations, such as half chevron type corrugations.

It should be noted that: although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that various combinations, modifications and equivalents of the present invention can be made by those skilled in the art, and all technical solutions and modifications thereof without departing from the spirit and scope of the present invention are encompassed by the claims of the present invention.

Claims

1. A heat exchange device comprises a plurality of stacked plates, wherein each plate comprises a plurality of first plates and a plurality of second plates, the plates are stacked to form a first circulation channel and a second circulation channel, and the first circulation channel is not communicated with the second circulation channel; the method is characterized in that:

the heat exchange device comprises a heat exchanger core, a valve assembly and a first interface;

the plate further comprises at least one third plate, the heat exchanger core comprises the first plate, the second plate and the third plate which are arranged in a stacked mode, the first plate comprises a first hole and a second hole, the second plate also comprises a first hole and a second hole, the third plate comprises a first blocking portion and a second hole, the first blocking portion is located at the position, corresponding to the first hole of the first plate or the second plate, of the third plate, the first plate and the second plate are arranged in a stacked mode, the first hole of the first plate and the first hole of the second plate are aligned to form a first hole channel, the first plate, the second plate and the third plate are arranged in a stacked mode, the second hole of the first plate, the second hole of the second plate and the second hole of the third plate are aligned to form a second hole channel, and the first hole channel and the second hole channel are parts of the first circulation channel, the first pore passage is divided into at least two sub-pore passages by the first blocking part, and each sub-pore passage of the first pore passage is communicated with the adjacent sub-pore passage through the second pore passage; the first circulation channel is divided into at least two heat exchange sections through the third plate, and the flow directions of fluids in adjacent heat exchange sections are opposite;

the valve assembly and the first port are located on the same side of the heat exchanger core, the valve assembly comprises a first flow-through region, a throttling region and a second flow-through region, the first flow-through region is located outside the heat exchanger core and is communicated with the first port, the second flow-through region is communicated with the first hole channel, and the throttling region is located between the first flow-through region and the second flow-through region;

the heat exchange device also comprises a mounting plate and a connecting channel, and the mounting plate and the valve assembly are positioned on the same side of the heat exchanger core; the connecting channel is formed between the mounting plate and the heat exchanger core, and the connecting channel is communicated with the first interface and the first circulation area;

2. The heat exchange device of claim 1, wherein:

3. The heat exchange device of claim 2, wherein: the first interface is located the mounting panel link up the mounting panel, the mounting panel is still including the spread groove, the spread groove is located the reverse side of mounting panel, the spread groove certainly first interface extends to the first opening of valve seat portion, the spread groove with form between the heat exchanger core interface channel, wherein the reverse side of mounting panel is the orientation the one side of heat exchanger core.

4. The heat exchange device of claim 1, wherein:

5. The heat exchange device of claim 1, wherein: the plate further comprises at least one fourth plate, the heat exchanger core comprises the fourth plate, the fourth plate comprises a first hole and a second blocking portion, the second blocking portion is located at a position corresponding to the fourth plate and second holes of the first plate, the second plate and the third plate, the first plate, the second plate and the fourth plate are stacked, so that the first hole of the first plate, the first hole of the second plate and the first hole of the fourth plate are aligned to form a first hole channel, the first plate, the second plate and the third plate are stacked, so that the second hole of the first plate, the second hole of the second plate and the second hole of the third plate are aligned to form a second hole channel, the first hole channel is divided into at least two sub-hole channels by the first blocking portion, and the second hole channel is divided into at least two sub-hole channels by the second blocking portion, each sub-orifice of the first orifice is communicated with an adjacent sub-orifice through the second orifice, and each sub-orifice of the second orifice is communicated with an adjacent sub-orifice through the first orifice; the first flow channel is divided into a plurality of heat exchange sections by the third plate and the fourth plate, and the flow directions of fluids in the adjacent heat exchange sections are opposite.

6. The heat exchange device of any one of claims 1 to 5, wherein:

7. The heat exchange device of claim 6, wherein:

8. The heat exchange device of claim 7, wherein: the end part of the second outer connecting pipe extending into the second pore passage comprises a flange, and the flange is provided with a matching part; the flange of the second outer connecting pipe extends into the through hole, the matching part is fixed with the reverse side of the second blocking part at the periphery of the through hole in a sealing way or the flange of the second outer connecting pipe does not extend into the through hole, and the matching part is fixed with the front side of the second blocking part at the periphery of the through hole in a sealing way; the reverse side of the second blocking part is the side, back to the heat exchanger core body where the valve component is located, and the front side of the second blocking part is the side, facing the heat exchanger core body where the valve component is located;

9. The heat exchange device of claim 8, wherein:

the plate sheets comprise plate planes and flanges, and corrugated bulges which respectively protrude out of the plate planes of the first plate sheet, the second plate sheet and the third plate sheet are formed on the plate planes of the plate sheets; the corrugated bulges are herringbone corrugated bulges comprising at least one bent part, and the herringbone corrugated bulges extend to the intersection of the plate plane and the flanging;

the height h of the herringbone corrugated bulges is less than or equal to 0.9mm, and the period m of the herringbone corrugated bulges is less than or equal to 8 mm; and/or the bent part of the herringbone corrugated protrusion is a platform area, and the width d of the platform area ranges from 0.2 mm to 2 mm.