Heat exchange core and heat exchanger

Abstract

The utility model relates to the technical field of heat exchange devices, in particular to a heat exchange core and a heat exchanger. The heat exchange core body comprises a cold side unit and a heat exchange unit, the cold side unit comprises a plurality of cold side flow channels, and the cold side flow channels are stacked at intervals; the hot side unit comprises a plurality of hot side flow channels, and the hot side flow channels are arranged between every two adjacent cold side flow channels; the cold side inlet is communicated with the inlet ends of the plurality of cold side runners; and the first cold side outlet and the second cold side outlet are communicated with the outflow ends of the multiple cold side flow channels. According to the heat exchange core body provided by the utility model, the cold-side fluid can flow out from at least two cold-side outlets, and the flow resistance of the cold-side fluid at the outlet end is reduced, so that the pressure drop of the cold-side fluid is reduced, the subsequent reaction between reactants is prevented from being influenced, and the working efficiency of an SOFC (Solid Oxide Fuel Cell) system is favorably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchange device technical field especially is related to a heat exchange core and heat exchanger. BACKGROUND

[0002] Solid oxide fuel cell (Solid Oxide Fuel Cell, SOFC for short) belongs to the third generation fuel cell, is a kind of direct chemical energy stored in fuel and oxidant at medium-high temperature high-efficiently, environmental friendly conversion into electric energy full-solid chemical power generation device, is the highest theoretical energy density in several fuel cells.SOFC belongs to high-temperature fuel cell, generally work temperature is 650 DEG C-1000 DEG C, preheating is needed when working to the fuel cell reactant passed in, reduces the temperature difference between reactant and operating temperature, improves working efficiency, simultaneously, the tail gas temperature of fuel cell emission when operating is extremely high and contains a large amount of heat energy, therefore, heat exchanger is generally used in SOFC system to recover the heat energy of flue gas and preheat reactant.

[0003] The heat exchanger structure used in current SOFC system is generally one-in one-out structure, i.e. one inlet and one outlet structure, this structure leads to that after cold side gas is heated in heat exchanger, the flow speed of gas increases, when the gas flows out from outlet, the pressure of gas reduces, leading to that the pressure drop of entire cold side gas is too large, influences the reaction between subsequent reactants, reduces the working efficiency of SOFC system. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of heat exchange core and heat exchanger to solve the technical problems that cold side gas is heated in heat exchanger, the flow speed of gas increases, when the gas flows out from outlet, the pressure of gas reduces, leading to that the pressure drop of entire cold side gas is too large in existing technology to some extent.

[0005] The utility model provides a kind of heat exchange core, comprising: cold side unit, the cold side unit includes multiple cold side flow channels, multiple the cold side flow channels are arranged at intervals and are stacked;Hot side unit, the hot side unit includes multiple hot side flow channels, and the hot side flow channel is equipped between adjacent two the cold side flow channels;Cold side inlet, the cold side inlet is communicated with the access end of multiple the cold side flow channels;First cold side outlet and second cold side outlet, the first cold side outlet and the second cold side outlet are communicated with the outflow end of multiple the cold side flow channels.

[0006] The cold side fluid can enter the cold side flow channel through the cold side inlet, and the hot side fluid enters the hot side flow channel; the cold side fluid exchanges heat with the hot side fluid flowing through the hot side flow channel during flowing through the cold side flow channel; part of the cold side fluid of the plurality of cold side flow channels flows out of the heat exchange core through the first cold side outlet, and another part of the cold side fluid flows out of the heat exchange core through the second cold side outlet. The heat exchange core provided by the utility model can realize that the cold side fluid flows out of at least two cold side outlets, the flow resistance of the cold side fluid at the outlet end is reduced, the pressure drop of the cold side fluid is reduced, and the reaction between the subsequent reactants is avoided, which is beneficial to improving the working efficiency of the SOFC system.

[0007] Further, in the stacking direction of the plurality of cold side flow channels, the first cold side outlet and the second cold side outlet are respectively located on two sides of the cold side unit; or, in the stacking direction of the plurality of cold side flow channels, the first cold side outlet and the second cold side outlet are located on the same side of the cold side unit.

[0008] Further, the heat exchange core further comprises: an outflow channel, in the stacking direction of the plurality of cold side flow channels, the outflow channel penetrates from one side of the cold side unit to the other side of the cold side unit, and the outflow channel is in communication with the plurality of cold side flow channels respectively; one end of the outflow channel is in communication with the first cold side outlet, and the other end of the outflow channel is in communication with the second cold side outlet.

[0009] Further, a partition plate is arranged in the outflow channel, the partition plate divides the outflow channel into a first sub-channel and a second sub-channel; the first sub-channel is in communication with part of the cold side flow channels, and the second sub-channel is in communication with another part of the cold side flow channels; one end of the first sub-channel is in communication with the first cold side outlet, and one end of the second sub-channel is in communication with the second cold side outlet.

[0010] Further, the partition plate and the cold side unit are independently arranged, and the partition plate is connected in the outflow channel; or the partition plate and the cold side unit are integrally formed.

[0011] Further, the heat exchange core further comprises: an inflow channel, in the stacking direction of the plurality of cold side flow channels, the inflow channel penetrates from one side of the cold side unit to the other side of the cold side unit, and the inflow channel is in communication with the plurality of cold side flow channels respectively; one end of the inflow channel is in communication with the cold side inlet.

[0012] Further, the cold side flow channel comprises two chips arranged in opposite directions; one hot side flow channel is formed between adjacent two cold side flow channels.

[0013] Further, a cold side fin is arranged in the cold side flow channel.

[0014] And / or, the inner wall of the chip is provided with a protrusion.

[0015] Further, the heat exchange core further comprises a side plate, in the stacking direction of the plurality of cold side flow channels, the two sides of the cold side unit are spaced apart and provided with the side plate, and the cold side unit and the side plate form a hot side flow channel.

[0016] The utility model provides a kind of heat exchanger, including shell above-mentioned heat exchange core, the shell is equipped with cold side fluid outer inlet, cold side fluid outer outlet, hot side fluid outer inlet and hot side fluid outer outlet;The heat exchange core is arranged in the shell, the cold side inlet is communicated with the cold side fluid outer inlet, the first cold side outlet and the second cold side outlet are both communicated with the cold side fluid outer outlet, and the hot side fluid outer inlet and the hot side fluid outer outlet are both communicated with the hot side flow channel.

[0017] It should be understood that both the foregoing general description and the following detailed description are intended for purposes of illustration and description only and are not intended to limit the disclosure. The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate subject matter of the disclosure. Furthermore, the description and drawings are to be construed together in order to explain the principles of the disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 It is the structure schematic diagram of the heat exchange core of an embodiment of the utility model;

[0020] Figure 2 It is the exploded view of the heat exchange core shown in figure 1; Figure 1

[0021] Figure 3 It is the structure schematic diagram of the cold side flow channel in the heat exchange core shown in figure 2; Figure 1

[0022] Figure 4 It is the structure schematic diagram of the chip in the cold side flow channel shown in figure 3; Figure 3

[0023] Figure 5 It is the structure schematic diagram of the heat exchange core of another embodiment of the utility model.

[0024] ​​​Icon: 1 - cold side flow passage; 2 - hot side flow passage; 3 - cold side inlet; 4 - first cold side outlet; 5 - second cold side outlet; 6 - cold side fin; 7 - hot side fin; 8 - side plate; 9 - shim; 11 - chip; 12 - protrusion; 14 - partition. DETAILED DESCRIPTION

[0025] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all of the embodiments.

[0026] The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application.

[0027] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0028] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] It should be noted that the heat exchanger of the present application is not only suitable for SOFC systems, but also can be used in other systems requiring heat exchange.

[0032] As shown in Figures 1 to 5 , the utility model provides a kind of heat exchange core, comprising: cold side unit, hot side unit, cold side import 3, first cold side outlet 4 and second cold side outlet 5;Cold side unit includes multiple cold side flow passages 1, multiple cold side flow passages 1 are arranged at intervals and are stacked;Hot side unit includes multiple hot side flow passages 2, and hot side flow passage 2 is provided between adjacent two cold side flow passages 1;Cold side import 3 is communicated with the entering end of multiple cold side flow passages 1;First cold side outlet 4 and second cold side outlet 5 are communicated with the outflow end of multiple cold side flow passages 1.

[0033] In the embodiment, cold side fluid can enter cold side flow passage 1 by cold side import 3, and hot side fluid enters hot side flow passage 2;Cold side fluid in multiple cold side flow passages 1 part flows out heat exchange core by first cold side outlet 4, and another part flows out heat exchange core by second cold side outlet 5.The heat exchange core provided in the embodiment can realize that cold side fluid flows out at least from two cold side outlets, so that the flow resistance of cold side fluid at the outlet end is reduced, thereby reducing the pressure drop of cold side fluid, and further avoiding affecting the reaction between subsequent reactants, which is beneficial to improve the working efficiency of SOFC system.

[0034] Among them, the number of cold side import 3 can be one, that is, the heat exchange core provided in the embodiment is one-in two-out structure.It can also be set to multiple cold side import 3 according to needs.

[0035] It can be understood that a third cold side outlet or a fourth cold side outlet or more cold side outlets can also be set according to needs.

[0036] In the stacking direction of multiple cold side flow passages 1 (which can also be understood as the height direction of heat exchange core), first cold side outlet 4 and second cold side outlet 5 are located at the middle part of heat exchange core, that is, cold side fluid flows through cold side flow passage 1 and then gathers in the middle, and then flows out heat exchange core by two cold side outlets;Or, in the stacking direction of multiple cold side flow passages 1, first cold side outlet 4 and second cold side outlet 5 are located on the same side of cold side unit;Or, in the width direction of cold side unit, first cold side outlet 4 and second cold side outlet 5 are respectively located on both sides of heat exchange core.

[0037] As an optional solution, as shown in Figure 1 and Figure 2 , in the stacking direction of multiple cold side flow passages 1, first cold side outlet 4 and second cold side outlet 5 are respectively located on both sides of cold side unit.

[0038] In the embodiment, the first cold side outlet 4 is arranged at one side of the cold side unit, and the second cold side outlet 5 is arranged at the other side of the cold side unit. After the cold side fluid flows through the cold side flow channel 1, the cold side fluid is divided into two parts and flows out from the two sides of the heat exchange core, so that the outflow of the cold side fluid is smooth, the pressure drop is further reduced, and the structure of the heat exchange core is regular and compact.

[0039] On the basis of the above embodiment, the cold side inlet 3 can be arranged at one side of the heat exchange core in the height direction (the stacking direction of the plurality of cold side flow channels 1). On this basis, the cold side inlet 3 can be located at the middle of the heat exchange core in the width direction, or at one side of the heat exchange core in the width direction. For example, in the width direction of the heat exchange core, the cold side inlet 3 is located at one side of the heat exchange core, and the first cold side outlet 4 and the second cold side outlet 5 are located at the other side of the heat exchange core. The medium flows into the heat exchange core from one side in the width direction of the heat exchange core and flows out from the other side. Alternatively, in the width direction of the heat exchange core, the cold side inlet 3 is located at one side of the heat exchange core, and the first cold side outlet 4 and the second cold side outlet 5 are located at the other side of the heat exchange core. In the width direction of the heat exchange core, the cold side inlet 3 is located at the middle of the heat exchange core, and the first cold side outlet 4 and the second cold side outlet 5 are respectively located at the two sides of the heat exchange core. The medium flows into the heat exchange core from the middle of one side and flows out from the two ends of the other side. The above is only an example and is not limited. The arrangement positions of the cold side inlet 3, the first cold side outlet 4 and the second cold side outlet 5, and the relative arrangement positions therebetween can be arranged as required, and details are not described herein.

[0040] As an optional solution, as shown in Figure 1 and Figure 2 The heat exchange core further includes an outflow passage. In the stacking direction of the plurality of cold side flow channels 1, the outflow passage penetrates from one side of the cold side unit to the other side of the cold side unit. The outflow passage is in communication with the plurality of cold side flow channels 1, that is, the cold side passage penetrates each cold side flow channel 1. The outflow passage is provided with a port in communication with the cold side flow channel 1. One end of the outflow passage is in communication with the first cold side outlet 4, and the other end of the outflow passage is in communication with the second cold side outlet 5.

[0041] In the embodiment, the outflow passage penetrates the cold side unit and is in communication with the first cold side outlet 4 and the second cold side outlet 5 at the two sides of the outflow passage. This structure makes the heat exchange core more compact and regular.

[0042] On the basis of the above embodiment, further, a partition plate 14 is arranged in the outflow passage. The partition plate 14 divides the outflow passage into a first sub-passage and a second sub-passage. The first sub-passage is in communication with a part of the cold side flow channels 1, and the second sub-passage is in communication with another part of the cold side flow channels 1. One end of the first sub-passage is in communication with the first cold side outlet 4, and one end of the second sub-passage is in communication with the second cold side outlet 5.

[0043] In the embodiment, the partition plate 14 divides the outflow channel into a first sub-channel and a second sub-channel, the plurality of cold-side flow channels 1 corresponding to the first sub-channel are first partial cold-side flow channels 1, and the plurality of cold-side flow channels 1 corresponding to the second sub-channel are second partial cold-side flow channels 1; the cold-side fluid entering the first partial cold-side flow channels 1 flows out through the first sub-channel from the first cold-side outlet 4, and the cold-side fluid entering the second partial cold-side flow channels 1 flows out through the second sub-channel from the second cold-side outlet 5. The partition plate 14 can be arranged to make the distribution of the cold-side fluid uniform.

[0044] The partition plate 14 is arranged independently of the cold-side unit, and is connected in the outflow channel, for example, is fixed in the outflow channel by welding, and can be arranged at any position of the outflow channel; optionally, the cold-side flow channel 1 includes two chips 11 arranged opposite to each other, and the through hole of one chip 11 communicating with the outflow channel is welded with the partition plate 14, facilitating welding processing.

[0045] Alternatively, the partition plate 14 is integrally formed with the cold-side flow channel 1. Specifically, the cold-side flow channel 1 includes two chips 11 arranged opposite to each other, and the through hole of one chip 11 communicating with the outflow channel is not provided with a through hole, and the through hole partially forms the partition plate 14.

[0046] As shown in Figure 1 and Figure 2 , on the basis of the above embodiment, further, the heat exchange core further includes an inflow channel, in the stacking direction of the plurality of cold-side flow channels 1, the inflow channel penetrates from one side of the cold-side unit to the other side of the cold-side unit, and the inflow channel and the plurality of cold-side flow channels 1 are respectively communicated; one end of the inflow channel is communicated with the cold-side inlet 3.

[0047] On the basis of the above embodiment, the cold-side flow channel 1 and the hot-side flow channel 2 can both be a pipe structure, the inlet end of the hot-side flow channel 2 is provided with a hot-side inlet, and the outlet end of the hot-side flow channel 2 is provided with a hot-side outlet.

[0048] As an optional solution, as shown in Figure 3 , the cold-side flow channel 1 includes two chips 11 arranged opposite to each other; one hot-side flow channel 2 is formed between the adjacent two cold-side flow channels 1.

[0049] In the embodiment, the two chips 11 are mutually butted, the two chips 11 and the interval between the two chips 11 form the cold side flow channel 1; the through holes are arranged at both ends of the chip 11, the edges of the through holes are outwardly turned up, the turned-up edges in the upper cold side flow channel 1 are connected with the turned-up edges in the lower cold side flow channel 1, the multiple turned-up edges at the outlet end of the cold side flow channel 1 are connected to form an outflow channel, and the multiple turned-up edges at the inlet end of the cold side flow channel 1 are connected to form an inflow channel. The hot side flow channel 2 is formed between the adjacent two cold side flow channels 1, and the hot side flow channel 2 is open around. The gaskets 9 can be arranged between the cold side flow channels 1 and between the two chips 11 to improve the strength of the heat exchange core.

[0050] Further, the cold side fin 6 is arranged in the cold side flow channel 1 on the basis of the above embodiment to improve the heat exchange efficiency. Of course, the hot side fin 7 can also be arranged in the hot side flow channel 2.

[0051] As shown in Figure 4 , on the basis of the above embodiment, further, the protrusions 12 are arranged on the inner wall of the chip 11 to disturb the flow direction of the fluid.

[0052] As shown in Figure 1 and Figure 2 , on the basis of the above embodiment, further, the heat exchange core further comprises the side plates 8, the side plates 8 are arranged at both sides of the cold side unit in the stacking direction of the multiple cold side flow channels 1, and the hot side flow channel 2 is formed between the cold side unit and the side plates 8.

[0053] The embodiment of the utility model further provides a kind of heat exchanger, including shell and the heat exchange core of any one technical solution described above, and shell is equipped with cold side fluid outer inlet, cold side fluid outer outlet, hot side fluid outer inlet and hot side fluid outer outlet;Heat exchange core is arranged in shell, and hot side inlet is communicated with cold side fluid outer inlet, and first cold side outlet 4 and second cold side outlet 5 are all communicated with cold side fluid outer outlet, and hot side fluid outer inlet and hot side fluid outer outlet are all communicated with hot side flow channel 2.Therefore, the heat exchanger has all beneficial technical effects of the heat exchange core, and here, no longer repeat.

[0054] The embodiment of the utility model further provides a kind of SOFC system, including the heat exchanger described above, and hot side fluid outer inlet can be communicated with the exhaust pipe of vehicle, to utilize the high-temperature exhaust gas generated by vehicle to carry out heat exchange with cold side fluid.The heat exchange core provided by the utility model can reduce the pressure drop of fluid, avoid the excessive pressure drop of entire cold side fluid, avoid affecting the reaction between subsequent reactants, and the SOFC system has high working efficiency.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced equivalently. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application. In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not described in detail in order not to obscure the understanding of the present specification. In addition, those skilled in the art can understand that although some embodiments herein include some features included in other embodiments but not others, the combination of features of different embodiments means to be within the scope of the present application and forms different embodiments.

Claims

1. A heat exchange core, characterized by, Comprise: A cold side unit comprising a plurality of cold side flow channels (1), a plurality of said cold side flow channels (1) are arranged in a spaced stacked manner; A hot side unit comprising a plurality of hot side flow channels (2), a hot side flow channel (2) is arranged between two adjacent cold side flow channels (1); A cold side inlet (3) in communication with the inlet end of a plurality of said cold side flow channels (1); A first cold side outlet (4) and a second cold side outlet (5) in communication with the outlet end of a plurality of said cold side flow channels (1).

2. The heat exchange core according to claim 1, wherein: In the stacking direction of a plurality of said cold side flow channels (1), said first cold side outlet (4) and said second cold side outlet (5) are respectively located on both sides of said cold side unit; Or, in the stacking direction of a plurality of said cold side flow channels (1), said first cold side outlet (4) and said second cold side outlet (5) are located on the same side of said cold side unit.

3. The heat exchange core of claim 2, wherein, The heat exchange core further comprises: An outlet passage, in the stacking direction of a plurality of said cold side flow channels (1), said outlet passage is formed from one side of said cold side unit to the other side of said cold side unit, and said outlet passage is in communication with a plurality of said cold side flow channels (1) respectively; One end of said outlet passage is in communication with said first cold side outlet (4), and the other end is in communication with said second cold side outlet (5).

4. The heat exchange core of claim 3, wherein A partition (14) is arranged in said outlet passage, said partition (14) divides said outlet passage into a first sub-passage and a second sub-passage; said first sub-passage is in communication with a part of said cold side flow channels (1), and said second sub-passage is in communication with another part of said cold side flow channels (1); one end of said first sub-passage is in communication with said first cold side outlet (4), and one end of said second sub-passage is in communication with said second cold side outlet (5).

5. The heat exchange core according to claim 4, wherein: Said partition (14) is independently arranged with said cold side flow channels, and said partition (14) is connected in said outlet passage; Or, said partition (14) is integrally formed with said cold side flow channels.

6. The heat exchange core according to any one of claims 1 to 5, characterized in that The heat exchange core further comprises: An inlet passage, in the stacking direction of a plurality of said cold side flow channels (1), said inlet passage is formed from one side of said cold side unit to the other side of said cold side unit, and said inlet passage is in communication with a plurality of said cold side flow channels (1) respectively; one end of said inlet passage is in communication with said cold side inlet (3).

7. The heat exchange core of claim 1, wherein Said cold side flow channel (1) comprises two chips (11) arranged in a spaced manner; two adjacent said cold side flow channels (1) form a said hot side flow channel (2).

8. The heat exchange core of claim 7, wherein, A cold side fin (6) is arranged in said cold side flow channel (1); And / or, a protrusion (12) is arranged on the inner wall of said chip (11).

9. The heat exchange core of claim 1, wherein, The heat exchange core further comprises a side plate (8), in the stacking direction of a plurality of said cold side flow channels (1), said side plate (8) is arranged in a spaced manner on both sides of said cold side unit, and said cold side unit and said side plate (8) form a said hot side flow channel (2).

10. A heat exchanger, characterized by The heat exchange core as claimed in any one of claims 1-9, wherein the heat exchange core is arranged in a shell, and the shell is provided with a cold-side fluid external inlet, a cold-side fluid external outlet, a hot-side fluid external inlet and a hot-side fluid external outlet; the cold-side inlet is in communication with the cold-side fluid external inlet, the first cold-side outlet (4) and the second cold-side outlet (5) are both in communication with the cold-side fluid external outlet, and the hot-side fluid external inlet and the hot-side fluid external outlet are both in communication with the hot-side fluid channel (2).

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