CN216081099U - Compact heat exchanger - Google Patents

Abstract

The utility model provides a compact heat exchanger, which comprises a plurality of heat exchange plates, a working fluid channel, a connecting plate and a connecting pipe, wherein the heat exchange plates are sequentially stacked along a first direction, the working fluid channel is formed between every two adjacent heat exchange plates, the connecting plate is arranged on the inlet side and/or the outlet side of the working fluid channel, the connecting plate is connected with the connecting plate, the connecting plate is provided with a connecting hole matched with the connecting pipe, the end part of the connecting pipe is positioned in the connecting hole and is fixed with the inner wall of the connecting hole, and/or the connecting pipe is arranged in the connecting hole in a penetrating manner, and the end part of the connecting pipe is fixed with one side, facing the heat exchange plates, of the connecting plate. The heat exchanger can effectively save the external space of the heat exchanger, thereby being beneficial to being matched with other structures to form a miniaturized assembly.

Description

Compact heat exchanger

Technical Field

The utility model relates to a compact heat exchanger, in particular to a compact heat exchanger with small volume and large heat exchange quantity.

Background

The heat exchanger that current compact heat exchanger includes a plurality of heat transfer boards that stack up the setting, set up in the heat transfer board outside in order to prevent the connecting plate that working fluid reveals, the connecting pipe that links to each other with the connecting plate, however, the connecting pipe is fixed mutually with the one side of connecting plate heat transfer board dorsad usually, and the connecting pipe adopts welded fastening with the connecting plate usually, consequently, fixed solder exposes in the heat exchanger outside between connecting pipe and the connecting plate, influence the outward appearance on the one hand, on the other hand, the solder has also occupied the outside some spaces of heat exchanger, be unfavorable for heat exchanger and other structural connection to form miniaturized subassembly.

In view of the above, there is a need for an improved compact heat exchanger to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a compact heat exchanger beneficial to miniaturization.

In order to achieve the above object, the present invention provides a compact heat exchanger, including a plurality of heat exchange plates stacked in sequence along a first direction, a working fluid channel formed between two adjacent heat exchange plates, a connecting plate disposed at an inlet side and/or an outlet side of the working fluid channel, and a connecting pipe connected to the connecting plate, wherein the connecting plate has a connecting hole matched with the connecting pipe, an end of the connecting pipe is located in the connecting hole and fixed to an inner wall of the connecting hole, and/or the connecting pipe is inserted into the connecting hole and an end of the connecting pipe is fixed to a side of the connecting plate facing the heat exchange plates.

As a further improvement of the present invention, the heat exchange plate is provided with a first recess communicated with the working fluid channel inlet and the working fluid channel outlet, the connecting plate is disposed in the first recess, and a working fluid distribution chamber is formed between the connecting plate and the working fluid channel inlet, and between the connecting plate and the working fluid channel outlet.

As a further improvement of the present invention, the heat exchange plate further has a second concave portion formed by further recessing two inner walls opposite to the first concave portion, and the connection plate is disposed in the second concave portion.

As a further improvement of the present invention, the depth of the working fluid distribution chamber is greater than the recess depth of the second recess.

As a further improvement of the present invention, the connecting tube further has a stop portion which is engaged with a wall surface of the connecting plate facing away from the heat exchange plate to prevent the pipeline from being excessively mounted.

As a further improvement of the utility model, the compact heat exchanger further has base plates respectively located at the top layer and the bottom layer, the base plates having sealing portions that cooperate with a wall surface of the connection plate on a side facing the heat exchange plates to seal between the connection plate and the heat exchange plates.

As a further improvement of the utility model, the heat exchange plate is provided with a transition area arranged on the inlet side and the outlet side of the working fluid channel, a heat exchange area arranged between the two transition areas, a plurality of first bulges arranged in the transition area, and a plurality of second bulges arranged in the heat exchange area, wherein the arrangement density of the first bulges is less than that of the second bulges.

As a further improvement of the present invention, the first protrusion has a convex lens shape or a capsule shape, and the first protrusion has drainage portions on both sides, the drainage portions being disposed toward the working fluid channel inlet and the working fluid channel outlet.

As a further improvement of the utility model, the first bulges are arranged in a plurality of rows and a plurality of columns, and two adjacent rows and two adjacent columns are arranged in a staggered manner.

As a further improvement of the present invention, the heat exchange plates include a first heat exchange plate and a second heat exchange plate stacked at intervals in sequence along an up-down direction, the compact heat exchanger further includes a sequence identification structure for preventing a stacking sequence of the first heat exchange plate and the second heat exchange plate from being incorrect, and the sequence identification structure is a notch concavely formed from one side of the first heat exchange plate or one side of the second heat exchange plate.

The utility model has the beneficial effects that: the end part of the connecting pipe of the compact heat exchanger is positioned in the connecting hole and fixed with the inner wall of the connecting hole, and/or the connecting pipe is arranged in the connecting hole in a penetrating way and the end part of the connecting pipe is fixed with one side of the connecting plate facing the heat exchange plate. Thereby avoid connecting pipe and connecting plate one side of heat transfer board dorsad fixed mutually to saved the space of connecting pipe and connecting plate dorsad heat transfer board one side, be favorable to heat exchanger and other structure cooperations to form miniaturized subassembly.

Drawings

Fig. 1 is a schematic perspective view of a compact heat exchanger according to the present invention.

Fig. 2 is an exploded perspective view of the compact heat exchanger of the present invention.

Fig. 3 is a schematic perspective view of a part of a heat exchanger plate with a second heat exchanger plate on the upper side.

Fig. 4 is a top view of fig. 3.

Fig. 5 is an exploded perspective view of fig. 3.

Fig. 6 is a schematic perspective view of a part of a heat exchanger plate with a first heat exchanger plate on the upper side.

Fig. 7 is a top view of fig. 6.

Fig. 8 is an exploded perspective view of fig. 6.

Fig. 9 is a cross-sectional view along AA of fig. 4.

Fig. 10 is a cross-sectional view of fig. 9.

Fig. 11 is a sectional view of the end of the heat exchanger plate of fig. 9 provided with guides.

Fig. 12 is a cross-sectional view of a second embodiment of a heat exchanger plate with end-face misalignment.

Fig. 13 is a sectional view of a third embodiment of a heat exchanger plate with end misalignment.

Fig. 14 is a sectional view of a fourth embodiment of a heat exchanger plate with end misalignment.

Fig. 15 is a cross-sectional view of a fifth embodiment of a heat exchanger plate with end misalignment.

Detailed Description

The present invention will be described in detail below with reference to embodiments shown in the drawings. The present invention is not limited to the embodiment, and structural, methodological, or functional changes made by one of ordinary skill in the art according to the embodiment are included in the scope of the present invention.

Referring to fig. 1 to 15, an embodiment of a compact heat exchanger according to the present invention is shown, wherein the compact heat exchanger is manufactured by combining a stamping process and an atomic diffusion welding process, and specifically, the compact heat exchanger includes a plurality of heat exchange plates stacked along a first direction, and a working fluid channel formed between two adjacent heat exchange plates. The heat exchange plate comprises a first heat exchange plate 1 and a second heat exchange plate 2 which are sequentially arranged at intervals. The first heat exchange plate 1 comprises a first gasket 11 and a first heat exchange sheet 12 which are stacked mutually, the second heat exchange plate 2 comprises a second gasket 21 and a second heat exchange sheet 22 which are stacked mutually, the heat exchange sheets and the gaskets are firstly manufactured by stamping, and then the heat exchange sheets and the gaskets are fixed together by adopting atomic diffusion welding to form the compact heat exchanger after the heat exchange sheets and the gaskets are stacked and arranged.

In this embodiment, the first direction is described by taking the vertical direction as an example, but in other embodiments, the first direction may be other directions. The first gasket 11 is stacked on the first heat exchange plate 12 to form the first heat exchange plate 1 for flowing a first working fluid, and the second gasket 21 is stacked on the second heat exchange plate 22 to form the second heat exchange plate 2 for flowing a second working fluid, so that the first heat exchange plate 1 and the second heat exchange plate 2 are sequentially stacked at intervals to form the compact heat exchanger. Of course, the heat exchanger plates may be stacked on top of the gasket to form the heat exchanger plate.

The first heat exchange plate 1 includes a first a surface and a first B surface, and the second heat exchange plate 2 includes a second a surface and a second B surface, where the first a surface and the first B surface are the upper surface and the lower surface of the first heat exchange plate 1, and the second a surface and the second B surface are the lower surface and the upper surface of the second heat exchange plate 2. The first heat exchange plate 1 and the second heat exchange plate 2 are alternately stacked with a first a surface and a second a surface facing each other, and a first working fluid channel 13 for flowing a first working fluid is formed between the first a surface and the second a surface; the first B-face and the second B-face form a second working fluid channel 23 therebetween for flowing a second working fluid.

Because the heat exchange plates and the gaskets are both made by stamping, compared with the traditional etching process, the method has the advantages of simple process, high yield and low cost, and can be widely applied to equipment with heat exchange in various fields.

In this embodiment, the first working fluid and the second working fluid are respectively illustrated by taking water and a refrigerant as an example, but in other embodiments, the first working fluid and the second working fluid are not limited to heat exchange between water and the refrigerant, and may also exchange heat between other two working fluids. For convenience of description, the first heat exchanger plate 12 is referred to as a water layer heat exchanger plate, the second heat exchanger plate 22 is referred to as a refrigerant layer heat exchanger plate, the first gasket 11 is referred to as a water layer gasket, the second gasket 21 is referred to as a refrigerant layer gasket, the first heat exchanger plate 1 is referred to as a water layer heat exchanger plate, the second heat exchanger plate 2 is referred to as a refrigerant layer heat exchanger plate, the first working fluid passage 13 is referred to as a water passage, and the second working fluid passage 23 is referred to as a refrigerant passage. The example is given by taking a group of water layer heat exchange plates and refrigerant layer heat exchange plates as an example, namely, the structure is four layers, wherein the first layer is a refrigerant layer gasket, the second layer is a refrigerant layer heat exchange sheet, the third layer is a water layer gasket, the fourth layer is a water layer heat exchange sheet, and the like.

As shown in fig. 6 to 8, in this embodiment, each layer of water layer heat exchange plate includes a water layer heat exchange fin and a pair of water layer gaskets disposed on two sides of the water layer heat exchange fin, so that a water inlet for water to flow in and a water outlet for water to flow out are formed at positions where the water layer gaskets are not disposed at the other two ends of the water layer heat exchange fin, and the water layer gaskets are disposed on the front and rear sides, and the water inlet and the water outlet are located on the left and right sides. Of course, the positions of the water layer gasket, the water inlet and the water outlet can be interchanged.

The refrigerant layer gasket is of an annular structure arranged on the periphery of the refrigerant layer heat exchange sheet, of course, the refrigerant layer gasket can be provided with two sheets similar to the water layer gasket and arranged on two opposite sides of the refrigerant layer heat exchange sheet, and the refrigerant inlet and the refrigerant outlet can be arranged on the same side with the water inlet and the water outlet so as to form a cocurrent or countercurrent arrangement with the water layer, and the refrigerant inlet and the refrigerant outlet can also be arranged on the left side and the right side so as to form a direct current arrangement with the water layer. The above mode can be specifically set according to specific products.

In this embodiment, the peripheral profile of water layer heat exchanger fin and refrigerant layer heat exchanger fin is central symmetry, and consequently, two water layer gasket structures that set up relatively are the same to be convenient for punching press production need not to produce the water layer gasket of two kinds of shapes, improves production efficiency, reduction in production cost, and when the assembly, also comparatively simple. Of course, the peripheral outline patterns of the water layer heat exchange plate and the refrigerant layer heat exchange plate can also be other symmetrical patterns.

The left and right sides of water layer heat exchange plate and refrigerant layer heat exchange plate all are provided with first depressed part 14, the second depressed part 15 that is linked together with first depressed part 14, second depressed part 15 further caves in from the relative two inner walls that set up in front and back of first depressed part 14 and forms. That is, the water layer fins, the refrigerant layer gaskets, and the refrigerant layer fins are provided with the first recesses 14 and the second recesses 15 on both left and right sides, and the water layer gaskets are provided with the first recesses 14 but the second recesses 15 because the water layer gaskets are provided on both front and rear sides.

The second recessed portion 15 is located at the outer side, the width of the second recessed portion 15 in the front-back direction is greater than the width of the first recessed portion 14, and the recessed depth of the second recessed portion 15 in the left-right direction is less than the depth of the first recessed portion 14. And the width of the first and second recesses 14 and 15 on one side is greater than the width of the first and second recesses 14 and 15 on the other side.

As shown in fig. 1 and 2, the compact heat exchanger further includes a connecting plate 3 disposed at the water inlet and the water outlet side, and a first working fluid pipe 4 connected to the connecting plate 3, where the connecting plate 3 has a connecting hole 31 matched with the first working fluid pipe 4, the connecting plate 3 is fixed to the inner wall of the second recess 15 by welding, and of course, the connecting plate 3 and the inner wall of the second recess 15 may be fixed by gluing or screwing. In this embodiment, the first working fluid pipe 4 comprises a first working fluid inlet pipe and a first working fluid outlet pipe, the first working fluid pipe 4 is a connecting pipe for water to flow, and the connecting plate 3 and the water channel inlet, the connecting plate 3 and the water channel outlet form a working fluid distribution chamber 28 therebetween. The end of the connecting pipe is located in the connecting hole 31 and fixed to the inner wall of the connecting hole 31, and/or the connecting pipe is arranged in the connecting hole 31 in a penetrating manner, and the end of the connecting pipe is fixed to one side, facing the heat exchange plate, of the connecting plate 3.

In this embodiment, the end of the connecting tube is located in the connecting hole 31 and fixed to the inner wall of the connecting hole 31, i.e. the connecting tube does not extend into the working fluid distribution chamber 28, so as to ensure that sufficient space is left at the water inlet end and the water outlet end to ensure that water smoothly enters the water channel. Also, there is enough space left at the water outlet end to ensure that water flows out of the compact heat exchanger smoothly, and since the connection pipe is located in the connection hole 31, the connection pipe does not become resistance to the flow of water in the working fluid distribution chamber 28. The connection tube also has a stop 41 which cooperates with the wall of the connection plate 3 facing away from the heat exchanger plates to prevent the connection tube from being excessively mounted, thus effectively preventing the connection tube from protruding into the working fluid distribution chamber 28 when the connection tube is mounted.

The inner walls of the connecting pipe and the connecting hole 31 are fixed to each other through welding, and on one hand, the welding position is located inside the compact heat exchanger, so that the integrity of the compact heat exchanger is guaranteed, and the attractiveness is improved. On the other hand, the space of the connecting pipe and the connecting hole 31 on the outer side wall surface of the connecting plate 3 back to the heat exchange plate is saved. Therefore, more space can be provided outside the compact heat exchanger for designing and installing more elements, when the elements meet the requirements, the whole structure can be further reduced, the compact design is realized, and the heat exchanger and other structures can form a miniaturized assembly. In addition, since the depth of the second recess 15 is smaller than the depth of the first recess 14, the thickness of the connecting plate 3 is small, that is, the mass of the connecting plate 3 is relatively small, which does not affect the overall mass of the compact heat exchanger greatly, and is beneficial to the light-weight design of the heat exchanger.

Of course, in other embodiments, the connecting pipe may also protrude from the inner side wall surface of the connection plate 3 facing the heat exchange plate, that is, the portion of the connecting pipe protruding from the wall surface of the connection plate 3 facing the heat exchange plate is located in the working fluid distribution chamber 28. Therefore, the connecting pipe and the inner wall surface of the connecting plate 3 can be welded to improve the fixing effect of the connecting plate 3 and the connecting pipe, and the smooth flow of water can be ensured because the depth of the first recess 14 is large, that is, the space of the working fluid distribution chamber 28 is also large.

In this embodiment, because the water inlet and the delivery port of water layer heat transfer board set up respectively in the left and right sides of relative setting to make water wholly extend a direction flow in the water passageway, do not have diversion or turn, consequently, can guarantee that water flows in the water passageway is stable, thereby guarantees the stability of whole heat transfer.

In this embodiment, the two layers of heat exchange plates enclosing the working fluid channel respectively have a first end portion 16 and a second end portion 24 enclosing the inlet of the working fluid channel, and at least a portion of the first end portion 16 and at least a portion of the second end portion 24 are arranged in a staggered manner along the extending direction of the working fluid channel.

As shown in fig. 9 and 10, the first end 16 may be an end of a water layer plate, and the second end 24 may be an end of a coolant layer gasket and/or a coolant layer plate. In this embodiment, the water layer heat exchanger fins protrude from the coolant layer spacer and the coolant layer heat exchanger fins along the water passage direction, and the coolant layer spacer and the coolant layer heat exchanger fins are disposed between two adjacent water layer heat exchanger fins. Therefore, when the five-layer structure comprising the water layer heat exchange fins, the refrigerant layer gaskets, the refrigerant layer heat exchange fins, the water layer gaskets and the water layer heat exchange fins is used as a group for observation, the size of the water channel inlet is the height between the two adjacent water layer heat exchange fins, and the height of the water channel is the height between the refrigerant layer heat exchange fins and the water layer heat exchange fins.

As shown in fig. 9 and 10, in order to ensure that water can continuously and stably enter the water channel, the refrigerant layer heat exchange fins protrude out of the refrigerant layer gasket along the direction of the water channel, and the refrigerant layer heat exchange fins have positioning portions 26 protruding away from the direction of the water layer heat exchange fins, and the positioning portions 26 are integrally formed by punching the refrigerant layer heat exchange fins. Therefore, after stacking, the water layer heat exchange fins and the refrigerant layer heat exchange fins are in a step shape, and the water channel is gradually reduced from the inlet to the inside, so that the water can smoothly flow.

As shown in fig. 12, the present invention further provides a second embodiment in which the end surfaces of the heat exchange plates are staggered, specifically, the refrigerant layer gasket may protrude from the refrigerant layer heat exchange fins along the water passage direction, and the refrigerant layer heat exchange fins do not need to be provided with the positioning portions 26, so that the step structure may be formed.

As shown in fig. 13, the present invention further provides a third embodiment in which the end surfaces of the heat exchange plates are dislocated, and the end portions of the refrigerant layer gasket and the refrigerant layer heat exchange plate may be flush with each other in the up-down direction. Or the refrigerant layer heat exchange fins protrude out of the refrigerant layer gasket along the direction of the water channel, but the positioning parts 26 are not arranged.

As shown in fig. 14, in addition to the above embodiments, the present invention further provides a fourth embodiment in which the end surfaces of the heat exchange plates are staggered, and specifically, the refrigerant layer gasket may also protrude from the water layer heat exchange plate along the water channel direction, wherein the two conditions are that the refrigerant layer gasket protrudes from the refrigerant layer heat exchange plate and the refrigerant layer heat exchange plate protrudes from the refrigerant layer gasket. When a group of five-layer structure of the refrigerant layer gasket, the refrigerant layer heat exchange sheet, the water layer gasket, the water layer heat exchange sheet and the refrigerant layer gasket is used for observation, the refrigerant layer heat exchange sheet, the water layer gasket and the water layer heat exchange plate are arranged between two adjacent refrigerant layer gaskets in the first condition, and therefore after stacking, the water channel inlet is horn-shaped, and smooth circulation of water can be guaranteed.

As shown in fig. 15, the second case, namely the present invention further provides a fifth embodiment of the heat exchange plate with the end faces dislocated, specifically, when the refrigerant layer heat exchange fins, the water layer gasket, the water layer heat exchange fins, and the refrigerant layer gasket are used as a group to be observed, the stacked structure is similar to the structure in which the water layer heat exchange fins protrude from the refrigerant layer gasket and the refrigerant layer heat exchange fins along the water passage direction.

As shown in fig. 11, in order to further reduce the flow resistance, the first end portion 16 and the second end portion 24 further have a guiding portion 17, the guiding portion 17 has a guiding inclined surface 18 on the upper side and/or the lower side, and the guiding inclined surface 18 is arranged in a plane or an arc surface. The water layer heat exchange plate, the refrigerant gasket and the refrigerant heat exchange plate are also provided with guide parts 17 arranged at the end parts of the water layer heat exchange plate, the refrigerant gasket and the refrigerant heat exchange plate, wherein when the guide inclined plane 18 is arranged in an arc surface, the guide inclined plane comprises two arc surfaces of an inward concave surface and an outward convex surface. Thus, in combination with the misaligned laminations and guides 17, flow resistance can be greatly reduced. Of course, the offset laminations and guides 17 can be alternatively arranged depending on the actual situation.

In this embodiment, the dislocation distance range between the water layer heat exchange fin, the refrigerant layer gasket and the refrigerant layer heat exchange fin is within 0.2-0.7mm, and preferably 0.5mm, so that the dislocation distance is small, the compact heat exchanger can be ensured to have a small volume, the flow resistance can be reduced, and water can conveniently enter the water layer flow channel.

In this embodiment, water layer heat exchanger fin, refrigerant layer heat exchanger fin, water layer gasket, refrigerant layer gasket still have along the through-hole 25 that the up-and-down direction runs through, wherein, the through-hole 25 of water layer heat exchanger fin, refrigerant layer heat exchanger fin, water layer gasket, refrigerant layer gasket sets up in both sides around, and is the diagonal angle setting, in other words, water inlet and delivery port set up in the left and right sides, and that through-hole 25 then sets up in both sides around, and the through-hole 25 of front side sets up on the left side or the right, and the through-hole 25 of rear side then sets up on the right or the left side. Each water layer gasket is only provided with one through hole 25, and when the water layer heat exchange plates and the refrigerant layer heat exchange plates are stacked, the through holes 25 form a channel for the refrigerant to enter and exit. Of course, when the water inlet and the water outlet are provided at the front and rear sides, the through holes 25 are provided at the left and right sides.

The upper side and the lower side of the compact heat exchanger are respectively connected with a second working fluid pipe 5, and the second working fluid pipe 5 comprises a second working fluid inlet pipe and a second working fluid outlet pipe. In this embodiment, the second working fluid pipe 5 is a refrigerant pipe, and therefore, the refrigerant pipe and the inlet of the refrigerant channel are arranged in a cross manner, that is, the refrigerant flows in the compact heat exchanger in the vertical direction, enters the refrigerant channel, then flows in the horizontal direction of the refrigerant channel, and finally flows out of the compact heat exchanger in the vertical direction. In this embodiment, the second working fluid tube 5 is perpendicular to the second working fluid channel 23. Therefore, when the refrigerant enters the refrigerant layer heat exchange plate, the refrigerant is bent once, so that the disturbance of the refrigerant is increased, the gas-liquid two phases of the refrigerant are fully mixed, the refrigerant is prevented from being separated into the gas-liquid two phases in the refrigerant layer channel, the temperature uniformity of the refrigerant is ensured, and the heat exchange stability is improved.

Moreover, because the connecting pipes are arranged on two opposite sides in the horizontal direction, and the refrigerant pipes are arranged on the upper side and the lower side, the space around the compact heat exchanger is fully utilized, the situation that the density of local pipelines is large is avoided, and the pipelines are easy to design, install and maintain. Moreover, the water inlet and the water outlet are opposite to the positions of the refrigerant inlet and the refrigerant outlet, for example, in this embodiment, if the water inlet is located on the left side and the water outlet is located on the right side, the refrigerant inlet is arranged on the right side, the refrigerant outlet is arranged on the left side, the flow direction of water is from left to right, and the overall flow direction of the refrigerant is from right to left, so that the water and the refrigerant form a counter flow design, and the heat exchange performance is improved to the maximum. Of course, in other embodiments, the inlet and outlet ports are located on the front and rear sides, and the inlet and outlet ports for the refrigerant are located on the rear and front sides. Or the water inlet and the refrigerant inlet, and the water outlet and the refrigerant outlet are arranged on the same side.

In this embodiment, the two through holes 25 located at opposite corners have different outer diameters, and when the compact heat exchanger is used as a condenser (as shown in fig. 1), the larger through hole 25 is used as a refrigerant inlet, and when the compact heat exchanger is used as an evaporator, the smaller through hole 25 is used as a refrigerant inlet. Taking a condenser as an example: for the condenser, the inlet is fed with gaseous high-pressure high-temperature refrigerant, the outlet is fed with liquid high-pressure refrigerant, the density difference between the gaseous refrigerant and the liquid refrigerant is very large, a thick pipeline is selected when a high-pressure air pipe needs to be designed and a thin liquid pipe is selected when a certain refrigerant flow is ensured and the refrigerant flow rate is controlled within a certain range, namely the outlet pipeline of the condenser.

In the through hole 25 on the same side, the inner diameter of the through hole 25 of the water layer heat exchange sheet is different from the inner diameter of the through hole 25 of the refrigerant layer heat exchange sheet, and the through hole 25 of the water layer heat exchange sheet and the inner wall of the through hole 25 of the refrigerant layer heat exchange sheet are arranged in a non-aligned mode, namely in a staggered mode, so that the refrigerant can smoothly flow into a refrigerant channel, and the water inlet and the water outlet staggered structure can be specifically referred to. In this embodiment, the inner diameter of the through hole 25 of the water layer heat exchange plate is larger than the inner diameter of the through hole 25 of the refrigerant layer heat exchange plate, but the arrangement may be reversed.

In this embodiment, water layer gasket, water layer heat exchanger fin, refrigerant layer gasket and refrigerant layer heat exchanger fin thickness are unanimous, and are not more than 0.1mm, and consequently, the runner thickness of water layer and refrigerant layer is also not more than 0.1mm, and preferred 0.1mm, not only guarantees to stabilize punching press and makes, can show the improvement heat transfer effect moreover. When the space height is smaller, the water and the refrigerant are equivalently divided into smaller structures, so that the heat exchange area is increased, and the heat exchange effect is improved. Therefore, when the compact heat exchanger is stacked to a certain height, the stacked layers are more, namely the space height of the water layer and the refrigerant layer is smaller, the heat exchange effect is better, and due to the fact that the layers are increased, although the contact area of water and the refrigerant with the heat exchange fins is increased, the flow loss is increased to a certain extent, the whole size of the compact heat exchanger is smaller, namely the length of the water channel and the length of the refrigerant channel are shorter, the flow loss is correspondingly reduced, the two are mutually balanced, and therefore the heat exchange effect is greatly improved on the premise that the flow loss is smaller.

The water layer gasket and the refrigerant layer gasket not only can play a role in increasing structural strength, but also more importantly, the water layer gasket and the refrigerant layer gasket form a boundary wall of the water layer heat exchange plate and the refrigerant layer heat exchange plate, so that water and refrigerant leakage is prevented, and normal flow of water and the refrigerant is ensured.

In order to guarantee that water layer gasket, water layer heat exchanger fin, refrigerant layer gasket, refrigerant layer heat exchanger fin can high-efficiently and orderly pile up to together, above-mentioned four all are equipped with the perforation, compact heat exchanger still has the base plate 6 that is located both ends from top to bottom, sets up the reference column on bottom base plate 6 respectively. In this embodiment, the through holes are disposed at four corners, and during assembly, the four through holes are sequentially inserted onto the bottom substrate 6, and after the lamination is completed, the upper substrate 6 is inserted onto the positioning posts, and finally atomic diffusion welding is performed to complete the fabrication of the compact heat exchanger. The base plate 6 has a sealing 61 which cooperates with a wall surface of the connection plate 3 on the side close to the heat exchanger plates for sealing between the connection plate 3 and the heat exchanger plates, thereby reducing the risk of leakage of the working fluid from between the connection plate 3 and the base plate 6.

However, for the convenience of insertion, the outer diameter of the positioning post is inevitably smaller than the inner diameter of the through hole, and therefore, the above four are liable to be misaligned. In order to ensure that the water layer gasket and the water layer heat exchange sheet and the refrigerant layer gasket and the refrigerant layer heat exchange sheet are accurately aligned, the water layer heat exchange sheet and the refrigerant layer heat exchange sheet are also provided with the protruding positioning parts 26, and the water layer gasket and the refrigerant layer gasket are respectively provided with the limiting parts 27 matched with the positioning parts 26.

Through setting up location portion 26 and spacing portion 27, guarantee accurate location, simultaneously, because the gasket outwards squints is avoided in accurate location, when fully guaranteeing atom diffusion welding, the welding area of gasket and heat exchanger fin improves the welding effect, also avoids the gasket to squint inwards moreover, avoids the width of water passageway and refrigerant passageway to reduce, guarantees the heat transfer effect.

In this embodiment, the positioning portion 26 of the water layer heat exchanger plate is disposed around the through hole 25 and formed by stamping and protruding from the inner wall of the through hole 25, and the limiting portion 27 of the water layer gasket is a notch continuously recessed from the through hole 25, and the notch is communicated with the through hole 25, so that the inner diameters of the through hole 25 and the notch of the water layer gasket are slightly larger than the inner diameter of the through hole 25 of the water layer heat exchanger plate as a whole, and the notch of the water layer gasket is sleeved outside the positioning portion 26 to realize positioning.

Because the through hole 25 is circular and the positioning part 26 of the water layer heat exchanger plate is formed by punching from the periphery of the inner wall of the through hole 25, the whole of the through hole 25 and the positioning part 26 is non-circular, and the whole of the through hole 25 and the notch is also non-circular, when the water layer gasket is arranged on the water layer heat exchanger plate, the joint of the notch and the through hole 25 forms a stopping structure, so that the water layer gasket is prevented from rotating, and the water layer gasket and the water layer heat exchanger plate are accurately positioned.

Utilize through-hole 25 sets up location portion 26 and spacing portion 27, on the one hand make full use of through-hole 25 self structure, the die design changes lessly, the stamping forming of being convenient for, and it is simple to make, on the other hand, has improved the heat transfer region 9 region of water layer heat exchanger fin as far as possible to improve heat transfer effect.

Location portion 26 on the refrigerant layer heat exchanger fin is protruding to stretch from its relative both sides and forms, and for punching press integrated into one piece, in this embodiment, location portion 26 is located the edge of refrigerant layer heat exchanger fin, and certainly protruding the formation of stretching of punching press around the inner wall of first depressed part 14, spacing portion 27 of refrigerant layer gasket then is its self relative both sides, just also refrigerant layer gasket card is held between the location portion 26 of both sides can, not only can guarantee the accurate location of refrigerant layer gasket, and only need to refrigerant layer gasket both sides the size design slightly little can, need not to do structural design, very big reduction manufacturing cost. Of course, in other embodiments, the two positioning portions 26 may be interchanged, and the positioning may also be achieved by providing a matching manner of the groove and the bump.

In this embodiment, the positioning portions 26 of the refrigerant layer heat exchange fins are disposed on the left and right sides, so that the height of the water inlet and the height of the water outlet in the vertical direction can be increased in addition to the above-mentioned precise alignment, thereby ensuring that water can more easily enter the water channel.

In the above, from the perspective of mutual positioning of the heat exchange fins and the gaskets between the heat exchange plates, from another perspective, the water layer heat exchange fins and the refrigerant layer gaskets are taken as the same heat exchange plate, and the refrigerant layer heat exchange fins and the water layer gaskets are taken as the other heat exchange plate, so that the positioning portion 26 and the limiting portion 27 are used for mutual positioning of two adjacent heat exchange plates. The structures of the positioning part 26 and the limiting part 27 are not changed, but the positioning part 26 of the heat exchange plate is formed by protruding from the heat exchange plate in the direction away from the gasket.

Compact heat exchanger still has the order identification structure 7 of guaranteeing that water layer gasket, water layer heat exchanger fin, refrigerant layer gasket, refrigerant layer heat exchanger fin pile up in order, in this embodiment, order identification structure 7 be for set up in with the breach of refrigerant layer gasket on the refrigerant heat exchanger fin, the breach is sunken to form with the both sides of refrigerant layer gasket on the refrigerant heat exchanger fin, and water layer heat exchanger fin gasket and water layer gasket do not set up the breach to when piling up, formed refrigerant heat exchanger plate and had the breach, water layer heat exchanger plate does not have the characteristic of breach, and then is convenient for discern whether pile up the mistake.

Wherein, the breach position on water layer heat exchanger fin and the refrigerant heat exchanger fin all sets up in both sides around, owing to both sides need not to set up pipeline and connecting plate 3 around to be convenient for direct stamping forming. In other embodiments, the gap may also be disposed on the water layer gasket and the water layer heat exchanger plate, or on the water layer gasket and the refrigerant layer gasket, or on the water layer heat exchanger plate and the refrigerant layer heat exchanger plate. Or the sequence identification structure 7 is a structure protruding from the edges of the water layer heat exchange sheet, the refrigerant heat exchange sheet, the water layer gasket and the refrigerant layer gasket.

The water layer heat exchange plate is provided with a transition region 8 and a heat exchange region 9 for water to flow in the direction from the water inlet to the water outlet, and in the embodiment, the water layer heat exchange plate is provided with two transition regions 8 which are respectively arranged at the left side and the right side of the heat exchange region 9. The water layer heat exchange sheet is provided with a plurality of first bulges 81 forming the transition region 8 and a plurality of second bulges 91 forming the heat exchange region 9, wherein the arrangement density of the first bulges 81 is smaller than that of the second bulges 91, so that the transition region 8 is convenient for water to flow in and flow out, the heat exchange region 9 can fully disturb water, the heat exchange area can be increased, the heat exchange time can be prolonged, and the heat exchange effect is improved. In this embodiment, in order to further enhance the heat exchange effect, the transition region 8 is also provided with a plurality of second protrusions 91.

Similarly, the refrigerant layer heat exchange plate is also provided with a transition region 8 and a heat exchange region 9 for refrigerant flowing along the direction from the refrigerant inlet to the refrigerant outlet, and the transition region 8 is also arranged diagonally because the refrigerant inlet and the refrigerant outlet of the refrigerant layer heat exchange plate are arranged diagonally. Similarly, the refrigerant layer heat exchange plate also has a plurality of first protrusions 81 forming the transition region 8 and a plurality of second protrusions 91 forming the heat exchange region 9.

In this embodiment, first arch 81 and second arch 91 are the one-way arch of punching press formation, the protruding height of first arch 81 and second arch 91 is not more than 0.1mm, preferably 0.1mm, and the protruding height of first arch 81 and second arch 91 is unanimous with the thickness of water layer gasket, water layer heat exchanger fin, refrigerant layer gasket and refrigerant layer heat exchanger fin promptly, that is to say the runner height is exactly protruding height, consequently, guaranteed gasket and protruding same height, when being convenient for atomic diffusion welding, it is fixed to stabilize the connection between the adjacent two-layer.

Just the water layer heat exchanger fin sets up with the first arch 81 and the second arch 91 syntropy of refrigerant layer heat exchanger fin, it should be noted that, because first arch 81 and second arch 91 are produced by the punching press, consequently, compare the arch that forms in traditional etching, the inside hollow structure that is of first arch 81 and second arch 91 of this application, and traditional etching is solid construction, consequently, the required production material of the compact heat exchanger of this application still less, the cost is lower, and weight is lighter, the installation of being convenient for is dismantled, and the application scene is wider.

In this embodiment, the first protrusion 81 is in a convex lens shape or a capsule shape, the first protrusion 81 has drainage portions located at both sides, and the drainage portions are disposed toward the water channel inlet and the water channel outlet, so as to reduce flow resistance, make water flow into or out of the heat exchanging area 9 more easily, and ensure smooth water inlet and outlet. Of course, the first protrusion 81 may have other shapes such as a drop shape and an oval shape. The second projection 91 is circular.

Therefore, the second projection 91 can also effectively reduce the flow resistance. It is a plurality of first arch 81 and a plurality of the protruding 91 of second is multiseriate setting in the left and right sides orientation to adjacent two first arch 81 of being misplaced and set up, equally, adjacent two second are protruding 91 also to be misplaced and set up, consequently, the first arch 81 and the protruding 91 of second that back was listed as can be further dispersed the water or the refrigerant that the previous row flowed through, thereby strengthen the disturbance of water and refrigerant in the runner, improve heat transfer area, increase heat transfer effect.

And the first protrusions 81 of the water layer heat exchange fins are arranged in a radial shape, namely a horn shape. Taking the left first protrusion 81 as an example: the first arch 81 of latter half is from the left hand right and is gradually inclining the setting backward, and the first arch 81 of first half is from the left hand right and is gradually and inclines and incline the setting forward, consequently, wholly is the loudspeaker form and arranges to when making into water, can avoid concentrating on intermediate position with both ends around the water direction, space in the make full use of water passageway makes the heat transfer more even, thereby improves heat transfer effect. Similarly, the first protrusions 81 of the refrigerant layer heat exchange fins are arranged radially.

In this embodiment, first arch 81 and second arch 91 are one-way arch and syntropy projection setting, the second arch 91 of water layer heat exchanger fin and the second arch 91 of refrigerant heat exchanger fin are eccentric settings simultaneously, the second arch 91 of water layer heat exchanger fin and the second center of a circle of refrigerant heat exchanger fin second arch 91 on top and bottom position are different promptly, but both have crossing common part in the upper and lower direction, therefore, the protruding 91 part butt of second of downside refrigerant layer heat exchanger fin is in the bottom surface of upside water layer heat exchanger fin, another part is facing to the protruding 91 cavity of water layer heat exchanger fin second, thereby make when carrying out atomic diffusion welding, the protruding 91 of second between adjacent water layer heat exchanger fin and the refrigerant layer heat exchanger fin supports jointly, greatly reduced the risk of extrusion deformation between water layer heat exchanger fin and the refrigerant layer heat exchanger fin.

In this embodiment, in each row of the second protrusions 91 in the heat transfer area 9 along the left-right direction, the distance between two adjacent second protrusions 91 ranges from 0.5mm to 1.5mm, and is preferably 1 mm. The distance between two adjacent second protrusions 91 in each row of second protrusions 91 along the front-back direction is also in the range of 0.5mm to 1.5mm, preferably 1 mm. And the diameter of the second projection 91 is not more than 0.5mm, preferably 0.5 mm. Therefore, the vertical distance between two adjacent rows in the front-rear direction is 0mm, and the vertical distance between two adjacent rows in the left-right direction is also 0 mm. And the second bulges 91 in two adjacent rows or the second bulges 91 in two adjacent columns are staggered by 1 mm.

Therefore, the second protrusions 91 are reasonably arranged, so that enough second protrusions 91 can be ensured, the risk of damaging the heat exchange fins during stamping can be effectively reduced, water or a refrigerant can be ensured to be fully disturbed in the flow channel, and the heat exchange performance is improved. Meanwhile, more second protrusions 91 can be arranged in the limited heat exchange area 9, and meanwhile, the punch forming is facilitated, so that the heat exchange area is increased, and the heat exchange effect is improved.

Wherein, the distance between two adjacent rows or two rows of second protrusions 91 is 1mm, that is, the width of the flow channel, and the thickness of the gasket (that is, the thickness of the flow channel or the height of the protrusions) is 0.1mm, according to the hydraulic diameter formula: d is 4 × ab/2 (a + b), where a is the channel width and b is the channel thickness, and d is 0.18, which indicates a small hydraulic diameter. When the hydraulic diameter is smaller, it can be understood that the arrangement density of the second protrusions 91 is greater, and the same length has more second protrusions 91, so that the heat exchange area can be significantly increased, thereby improving the heat exchange effect.

From another perspective: when the arrangement density of the second protrusions 91 is greater, that is, the cross-sectional area of the flow path becomes smaller, according to the flow velocity calculation formula: under the same flow G, the smaller the cross section area A of the flow passage, the larger the flow velocity V is, and the larger the flow velocity is, the larger the heat transfer coefficient is, so that the heat exchange effect can be greatly improved.

In summary, the end of the connection pipe of the compact heat exchanger of the present invention is located in the connection hole 31 and fixed to the inner wall of the connection hole 31, and/or the connection pipe is inserted into the connection hole 31 and the end of the connection pipe is fixed to a side of the connection plate facing the heat exchange plate. Thereby avoid connecting pipe and connecting plate 4 one side of heat transfer board dorsad fixed mutually to saved the space of connecting pipe and connecting plate dorsad heat transfer board one side, be favorable to heat exchanger and other structure cooperations to form miniaturized subassembly.

The two layers of heat exchange plates forming the working fluid channel of the compact heat exchanger of the utility model are respectively provided with a first end part 16 and a second end part 24 forming the inlet of the working fluid channel, and at least one part of the first end part 16 and at least one part of the second end part 24 are arranged along the extending direction of the working fluid channel in a staggered way. Therefore, the inlet of the working fluid channel is larger than that of the first heat exchange plate 1 and the second heat exchange plate 2 when being arranged in a flush mode, so that the working fluid can conveniently enter the working fluid channel, the stability of the compact heat exchanger is improved, and the heat exchange performance is improved.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims (10)

1. A compact heat exchanger characterized by: include along a plurality of heat transfer boards that the first direction piled up in proper order, form working fluid passageway between two adjacent heat transfer boards, set up in the connecting plate of working fluid passageway inlet side and/or outlet side, the connecting pipe that links to each other with the connecting plate, the connecting plate have with connecting pipe matched with connecting hole, the tip of connecting pipe be located the connecting hole and with the connecting hole internal wall fixed mutually, and/or, just in the connecting hole is worn to locate by the connecting pipe the tip and the connecting plate orientation of connecting pipe one side of heat transfer board is fixed mutually.

2. The compact heat exchanger of claim 1, wherein: the heat exchange plate is provided with a first concave part communicated with the working fluid channel inlet and the working fluid channel outlet, the connecting plate is arranged in the first concave part, and a working fluid distribution cavity is formed between the connecting plate and the working fluid channel inlet as well as between the connecting plate and the working fluid channel outlet.

3. The compact heat exchanger of claim 2, wherein: the heat exchange plate is also provided with a second concave part formed by further sinking two inner walls oppositely arranged from the first concave part, and the connecting plate is arranged in the second concave part.

4. The compact heat exchanger of claim 2, wherein: the depth of the working fluid distribution chamber is greater than the recess depth of the second recess.

5. The compact heat exchanger of claim 1, wherein: the connecting pipe is also provided with a stop part which is matched with the wall surface of the connecting plate back to the heat exchange plate so as to prevent the pipeline from being excessively arranged.

6. The compact heat exchanger of claim 1, wherein: the compact heat exchanger also has base plates on the top layer and the bottom layer, respectively, the base plates having sealing portions that cooperate with wall surfaces of the connection plates facing the heat exchange plates to seal between the connection plates and the heat exchange plates.

7. The compact heat exchanger of claim 1, wherein: the heat exchange plate is provided with transition areas arranged on the inlet side and the outlet side of the working fluid channel, a heat exchange area arranged between the two transition areas, a plurality of first bulges arranged in the transition areas, and a plurality of second bulges arranged in the heat exchange area, wherein the arrangement density of the first bulges is smaller than that of the second bulges.

8. The compact heat exchanger of claim 7, wherein: the first bulge is in a convex lens shape or a capsule shape, the first bulge is provided with drainage parts positioned on two sides, and the drainage parts are arranged towards the inlet of the working fluid channel and the outlet of the working fluid channel.

9. The compact heat exchanger of claim 7, wherein: the first bulges are arranged in multiple rows and multiple columns, and two adjacent rows and two adjacent columns are arranged in a staggered manner.

10. The compact heat exchanger of claim 1, wherein: the compact heat exchanger also comprises a sequence identification structure for preventing the first heat exchange plate and the second heat exchange plate from being stacked in wrong sequence, wherein the sequence identification structure is a notch concavely arranged on one side of the first heat exchange plate or one side of the second heat exchange plate.

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