High efficiency heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, and provides a high-efficiency heat exchanger, which includes a heat exchange mechanism, a first end face sealing plate, and a second end face sealing plate. The heat exchange mechanism includes a plurality of heat exchange components stacked on each other, and each heat exchange component includes a first pad, a first flow plate, a second pad, and a second flow plate stacked in sequence. The first pad and the second pad are completely identical and are arranged to be staggered with each other by 90 degrees of rotation, and the first flow plate and the second flow plate are completely identical and are arranged to be staggered with each other by 90 degrees of rotation, forming a main channel and a secondary channel that are not connected to each other. The utility model forms a main channel and a secondary channel that are not connected to each other by stacking the first pad, the first flow plate, the second pad, and the second flow plate in sequence, so that even if the heat exchanger is manufactured by a stamping process, its volume becomes smaller, avoiding excessive molding time, improving production efficiency and simplifying the process, reducing costs, and also making the main channel and the secondary channel closer, improving heat exchange efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a high-efficiency heat exchanger. Background Art

[0002] In the refrigeration industry, heat exchangers can be roughly classified into fin heat exchangers, plate heat exchangers, tube heat exchangers, etc. according to their structure. These heat exchangers are generally made of materials with good thermal conductivity and use temperature differences to exchange heat to achieve cooling or heating effects. With the continuous improvement of environmental protection standards and energy standards, more efficient heat exchangers can meet market demand.

[0003] The heat exchanger plates of plate heat exchangers can be divided into stamping and etching according to the forming method. Among them, the heat exchanger plates of stamping are formed by integral brazing after stacking. The heat exchanger plates of etching are formed by atomic bulk welding after stacking.

[0004] However, in the related technologies, the plate heat exchanger formed by stamping is large in size; the plate heat exchanger formed by etching has a long processing time, low production efficiency, complex process, high cost, and it is difficult to ensure the consistency of etching depth, resulting in low yield rate. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a high-efficiency heat exchanger, which can be produced by stamping and forming, and its volume can be smaller; it can also make the production process simpler, improve production efficiency and reduce costs, and improve the yield rate.

[0006] In order to achieve the purpose of the utility model, the utility model

[0007] The utility model provides a high-efficiency heat exchanger, comprising:

[0008] The heat exchange mechanism comprises a plurality of mutually stacked heat exchange components, each of which comprises a first pad, a first flow plate, a second pad and a second flow plate which are stacked in sequence.

[0009] The first gasket and the second gasket are identical and are arranged 90 degrees apart from each other, and the first flow plate and the second flow plate are identical and are arranged 90 degrees apart from each other, forming a main channel and a secondary channel that are not connected to each other.

[0010] The main channel includes a first main channel and a second main channel that are interconnected, and the side channel includes a first side channel and a second side channel that are interconnected;

[0011] The first end surface sealing plate is provided with a first inlet and a first outlet, the first inlet is connected to the first main channel, and the first outlet is connected to the second main channel.

[0012] The second end surface sealing plate is provided with a second inlet and a second outlet, the second inlet is communicated with the first auxiliary channel, and the second outlet is communicated with the second auxiliary channel.

[0013] Preferably, the first pad is provided with a first pad main through hole and a second pad main through hole symmetrically arranged, the first pad is further provided with a first pad secondary through hole and a second pad secondary through hole symmetrically arranged, and the first pad is further provided with a pad hollow hole.

[0014] The first flow plate is provided with a first main flow plate opening and a second main flow plate opening which are symmetrically arranged, the first flow plate is also provided with a first secondary flow plate opening and a second secondary flow plate opening which are symmetrically arranged, and the first flow plate is also provided with an inner concave cavity,

[0015] After stacking, the first main through hole of the pad matches with the first main through port of the flow plate to form the first main channel, the second main through hole of the pad matches with the second main through port of the flow plate to form the second main channel, the hollow hole of the pad and the inner concave cavity form a heat exchange area, and the first main channel is connected with the second main channel in a spanning connection through the heat exchange area;

[0016] The first main through hole of the second pad is matched with the first secondary through port of the first flow plate to form the first secondary channel, the second main through hole of the second pad is matched with the second secondary through port of the first flow plate to form the second secondary channel, the hollow hole of the second pad and the inner concave cavity of the first flow plate form a heat exchange area, and the first secondary channel is connected with the second secondary channel through the heat exchange area in a spanning manner.

[0017] Preferably, the first pad is further provided with an external connection opening, and the external connection opening connects the main channel and the heat exchange area after stacking.

[0018] Preferably, the first pad is further provided with a main channel inner opening, and the main channel inner opening is connected to a plurality of the first main channels or a plurality of the second main channels.

[0019] The first pad is further provided with a secondary channel inner opening, and the secondary channel inner opening is connected to a plurality of the first secondary channels or a plurality of the second secondary channels.

[0020] Preferably, the first pad is further provided with reinforcing ribs, and the first flow plate is further provided with a receiving groove, and the receiving groove matches the reinforcing ribs.

[0021] Preferably, a guide island is provided on the first flow-through plate, and the guide island is arranged in the inner concave cavity.

[0022] Preferably, the first end face sealing plate or the second end face sealing plate both include a safety valve, and the first end face sealing plate or the second end face sealing plate both have an accommodating cavity;

[0023] The safety valve comprises a positioning plug, an elastic member and a piston. The positioning plug causes the piston to slide against the accommodating cavity through the elastic action of the elastic member.

[0024] Preferably, both the first end face sealing plate and the second end face sealing plate are provided with a collecting port.

[0025] Preferably, the first flow plate is further provided with a flow groove, the width of the flow groove is greater than the accommodating groove, and the flow groove matches the reinforcing rib.

[0026] The beneficial effects of the utility model are as follows: the high-efficiency heat exchanger provided by the utility model is formed by stacking the first pad, the first flow plate, the second pad and the second flow plate in sequence, and the first pad and the second pad are exactly the same and are rotated 90 degrees and staggered with each other, the first flow plate and the second flow plate are exactly the same and are rotated 90 degrees and staggered with each other, so that the main channel and the secondary channel that are not connected to each other are formed, so that even if the heat exchanger is manufactured by the stamping process, its volume can be smaller, avoiding too long molding time, improving production efficiency and simplifying the process required for production, and ultimately reducing costs, and it can also make the main channel and the secondary channel closer, thereby improving heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other purposes, features and advantages of the present invention will become more clear through a more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts in all the accompanying drawings, and the drawings are not deliberately scaled to the actual size, but the focus is on illustrating the subject matter of the present application.

[0028] Figure 1 A schematic diagram of the overall structure of a high-efficiency heat exchanger provided in an embodiment of the utility model;

[0029] Figure 2 A schematic diagram of the heat exchange mechanism in the high-efficiency heat exchanger provided in an embodiment of the utility model;

[0030] Figure 3 An exploded schematic diagram of a heat exchange mechanism in a high-efficiency heat exchanger provided in an embodiment of the utility model having a guide island;

[0031] Figure 4 A schematic side view of a heat exchange mechanism in a high-efficiency heat exchanger provided in an embodiment of the utility model;

[0032] Figure 5 for Figure 4 Schematic cross-sectional view along the AA direction;

[0033] Figure 6 for Figure 4 Schematic cross-sectional view in the middle BB direction;

[0034] Figure 7 A schematic diagram of the end face sealing plate structure in the high-efficiency heat exchanger provided in an embodiment of the utility model;

[0035] Figure 8 for Figure 7 Schematic diagram of the decomposition of

[0036] Fig. 9 It is a schematic diagram of the structure of a high-efficiency heat exchanger with a clamping position.

[0037] In the figure:

[0038] 100, heat exchange mechanism; 110, heat exchange assembly; 111, first pad; 1111, first main through hole of pad; 1112, second main through hole of pad; 1113, first secondary through hole of pad; 1114, second secondary through hole of pad; 1115, hollow hole of pad; 1116, main external connection port; 1117, main channel internal connection port; 1118, secondary channel internal connection port; 1119, reinforcing rib; 112, first flow plate; 1121, first main through hole of flow plate; 1122, second main through hole of flow plate; 1123, first secondary through hole of flow plate; 1124, second secondary through hole of flow plate; 1125, inner concave cavity; 1126, accommodating groove; 1127, guide island; 1128, circulation groove; 113, second pad; 114, second flow plate;

[0039] 200, first end surface sealing plate; 210, first inlet; 220, first outlet; 230, accommodating chamber;

[0040] 300, second end surface sealing plate; 310, second inlet; 320, second outlet;

[0041] 400, main channel; 410, first main channel; 420, second main channel;

[0042] 500, auxiliary channel; 510, first auxiliary channel; 520, second auxiliary channel;

[0043] 600, safety valve; 610, positioning plug; 620, elastic member; 630, piston;

[0044] 700, clamping position;

[0045] 800. Collecting port. DETAILED DESCRIPTION

[0046] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0047] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to another element and integrated therewith, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention pertains. The terms used in the specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0049] Combine the following Figures 1 to 9 It should be understood that the following description is only an illustrative embodiment of the present invention and does not constitute any limitation to the present invention.

[0050] Example 1

[0051] Combination Figures 1 to 9 Embodiment 1 of the present invention further provides a high-efficiency heat exchanger, which includes a heat exchange mechanism 100, a first end surface sealing plate 200 and a second end surface sealing plate 300.

[0052] The heat exchange mechanism 100 includes a plurality of heat exchange components 110 stacked on top of each other, and each heat exchange component 110 includes a first gasket 111, a first flow plate 112, a second gasket 113 and a second flow plate 114 stacked in sequence.

[0053] The first gasket 111 and the second gasket 113 are identical and staggered with each other at 90 degrees, and the first flow plate 112 and the second flow plate 114 are identical and staggered with each other at 90 degrees, forming a main channel 400 and a secondary channel 500 that are not connected to each other.

[0054] The main channel 400 includes a first main channel 410 and a second main channel 420 that are communicated with each other, and the sub-channel 500 includes a first sub-channel 510 and a second sub-channel 520 that are communicated with each other.

[0055] The first end surface sealing plate 200 is provided with a first inlet 210 and a first outlet 220 . The first inlet 210 is communicated with the first main channel 410 , and the first outlet 220 is communicated with the second main channel 420 .

[0056] The second end surface sealing plate 300 is provided with a second inlet 310 and a second outlet 320 . The second inlet 310 is communicated with the first sub-channel 510 , and the second outlet 320 is communicated with the second sub-channel 520 .

[0057] In this embodiment, the refrigerant can be input from the first inlet 210 of the first end face sealing plate 200, and after passing through the main channel 400 formed by the heat exchange component 110, it can be output from the second outlet 320 of the first end face sealing plate 200; the material to be heat exchanged (for example, water) can be input from the second inlet 310 of the second end face sealing plate 300, and after passing through the secondary channel 500 formed by the heat exchange component 110, it can be output from the second outlet 320 of the second end face sealing plate 300 to complete the heat exchange.

[0058] It can be understood that the heat exchanger is formed by stacking the first pad 111, the first flow plate 112, the second pad 113 and the second flow plate 114 in sequence, and the first pad 111 and the second pad 113 are exactly the same and are rotated 90 degrees and staggered with each other, and the first flow plate 112 and the second flow plate 114 are exactly the same and are rotated 90 degrees and staggered with each other, so as to form a main channel 400 and a secondary channel 500 that are not connected to each other. Even if the heat exchanger is manufactured by a stamping process, its volume can be smaller, and the molding time can be avoided to be too long, which can improve the production efficiency and simplify the process required for production, and finally reduce the cost. It can also make the main channel 400 and the secondary channel 500 closer, thereby improving the heat exchange efficiency.

[0059] Specifically, in this embodiment, the first pad 111 is provided with a symmetrically arranged first main through hole 1111 and a pad second main through hole 1112, the first pad 111 is also provided with a symmetrically arranged first secondary through hole 1113 and a pad second secondary through hole 1114, and the first pad 111 is also provided with a pad hollow hole 1115.

[0060] The first flow plate 112 is provided with a symmetrically arranged first main flow plate opening 1121 and a symmetrically arranged second main flow plate opening 1122 , a symmetrically arranged first flow plate opening 1123 and a symmetrically arranged second flow plate opening 1124 , and an inner concave cavity 1125 .

[0061] After stacking, the first main through hole 1111 of the pad matches with the first main opening 1121 of the flow plate to form the first main channel 410; the second main through hole 1112 of the pad matches with the second main opening 1122 of the flow plate to form the second main channel 420; the hollow hole 1115 of the pad and the inner concave cavity 1125 form a heat exchange area, and the first main channel 410 and the second main channel 420 are connected in a cross-connected manner through the heat exchange area. The refrigerant in this embodiment can flow through this heat exchange area.

[0062] The first main through hole 1111 of the second pad 113 matches with the first secondary through hole 1123 of the first through-flow plate 112 to form the first secondary channel 510; the second main through hole 1112 of the second pad 113 matches with the second secondary through hole 1124 of the first through-flow plate 112 to form the second secondary channel 520; the pad hollow hole 1115 of the second pad 113 and the inner concave cavity 1125 of the first through-flow plate 112 form a heat exchange area, and the first secondary channel 510 and the second secondary channel 520 are connected in a cross-connected manner through the heat exchange area. The heat exchange material (for example, water) in this embodiment can flow through this heat exchange area.

[0063] Since the heat exchange area formed by the hollow holes 1115 of the first pad 111 and the inner concave cavity 1125 of the first flow plate 112 is independent of the heat exchange area formed by the hollow holes 1115 of the second pad 113 and the inner concave cavity 1125 of the first flow plate 112, the main channel 400 and the sub-channel 500 can also be independent and fit together, thereby further improving the heat exchange efficiency and reducing the volume.

[0064] Furthermore, in this embodiment, in order to ensure that the main channel 400 and the heat exchange area can be fully connected after stacking, a main external communication port 1116 can be provided on the first pad 111 .

[0065] Of course, in order to allow the separated multiple first main channels or multiple second main channels to be connected in a cross-connected manner, the first pad 111 is further provided with a main channel inter-connection port 1117, and the main channel inter-connection port 1117 is connected to the multiple first main channels 410 or the multiple second main channels 420. For example, when the first main channel 410 includes the first main channel A and the first main channel B, the main channel inter-connection port 1117 can connect the first main channel A and the first main channel B to expand the volume of the first main channel or the multiple second main channels themselves and improve the heat exchange efficiency.

[0066] The first pad 111 is also provided with a secondary channel inner opening 1118, which is connected to the plurality of first secondary channels 510 or the plurality of second secondary channels 520, and can also expand the volume of the first secondary channels or the plurality of second secondary channels themselves, thereby improving heat exchange efficiency.

[0067] In this embodiment, in order to ensure the strength of the heat exchanger forming sheet and the formation of each flow channel, this embodiment can be stamped with 0.09mm material. In addition, a reinforcing rib 1119 is provided on the first pad 111, and a receiving groove 1126 is provided on the first flow plate 112. The receiving groove 1126 matches the reinforcing rib 1119. The shape and depth of the receiving groove 1126 are kept consistent with the thickness of the first pad 111. When stacking, the "cross" reinforcing rib 1119 on the first pad 111 can be set in the receiving groove 1126.

[0068] In this embodiment, the first flow plate 112 is further provided with a guide island 1127, which is provided on the inner cavity 1125. That is, the guide island 1127 is provided in the heat exchange area, and when stacked, the guide islands 1127 on adjacent flow plates (for example, the first flow plate 112 and the second flow plate 114) are abutted against each other to ensure that the adjacent flow plates can be connected together during welding, thereby increasing the pressure bearing strength.

[0069] At the same time, since two adjacent flow plates (for example, the first flow plate 112 and the second flow plate 114) are rotated and offset from each other, a certain gap will be formed where the protrusions of the guide island 1127 abut against each other to allow refrigerant or water to flow through it, thereby not reducing the effective heat exchange area in the heat exchange zone due to an excessively large welding surface.

[0070] In this embodiment, the first end surface sealing plate 200 or the second end surface sealing plate 300 includes a safety valve 600. The first end surface sealing plate 200 or the second end surface sealing plate 300 is provided with an accommodating cavity 230.

[0071] The safety valve 600 includes a positioning plug 610 , an elastic member 620 and a piston 630 . The positioning plug 610 slides the piston 630 against the accommodating chamber 230 through the elastic action of the elastic member 620 .

[0072] The safety valve 600 can be provided at the inlet and outlet of the water flow channel (for example, one is provided at the first inlet 210 and the first outlet 220 of the first end face sealing plate 200). When the water flow pressure in the heat exchanger is too high, the water pressure can act on the piston 630 through the connection of the accommodating chamber 230, and the piston 630 compresses the elastic member 620 to open the safety valve 600 to absorb the overflowing water. When the ice in the heat exchanger melts or the pressure decreases, the elastic member 620 in the safety valve 600 can press the contained water back into the circulation pipeline.

[0073] In this way, it is possible to prevent the heat exchanger from bursting due to the expansion of the water volume when the water (to be) inside the heat exchanger freezes due to overcooling. Therefore, during the freezing process, as the pressure in the water flow channel increases, the unfrozen water is diverted into the explosion-proof safety valve 600 to reduce the amount of water inside the heat exchanger, thereby further reducing the pressure in the water flow channel in the heat exchanger and the final frozen volume to prevent the heat exchanger from bursting.

[0074] The high-efficiency heat exchanger provided in this embodiment 1 can be manufactured based on the following high-efficiency heat exchanger manufacturing method.

[0075] When manufacturing the high-efficiency heat exchanger of this embodiment 1, the following steps may be adopted:

[0076] The first through-flow plate 112 and the first pad 111 are punched; since the first pad 111 and the second pad 113 are completely identical, the first through-flow plate 112 and the second through-flow plate 114 are also completely identical, and at least two through-flow plates 112 and the first pad 111 are punched respectively. After punching, the first pad 111 and the second pad 113, the first through-flow plate 112 and the second through-flow plate 114 are flattened and deburred.

[0077] The first pad 111 , the first flow plate 112 , the second pad 113 and the second flow plate 114 are stacked in sequence; positioning pins may be used for auxiliary positioning, stacking and pre-tightening.

[0078] Align and install the first end face sealing plate 200 and the second end face sealing plate 300 with the stacked first pad 111, the first flow plate 112, the second pad 113 and the second flow plate 114;

[0079] The installed first end face sealing plate 200 and the second end face sealing plate 300, the first pad 111, the first flow plate 112, the second pad 113 and the second flow plate 114 are welded into a whole by atomic diffusion welding;

[0080] The welded whole is subjected to finished product inspection.

[0081] By adopting the manufacturing method of the high-efficiency heat exchanger provided in this embodiment 1 to manufacture the high-efficiency heat exchanger, a heat exchanger with a smaller volume and higher heat exchange efficiency can be manufactured; and the production process is simpler, the production efficiency is higher, the cost is lower and the yield rate is high.

[0082] Example 2

[0083] Combination Figures 7 to 9 The high-efficiency heat exchanger provided in this embodiment is basically the same as that in Embodiment 1, except that the first end face sealing plate 200 and the second end face sealing plate 300 in the high-efficiency heat exchanger provided in this embodiment are both provided with clamping positions 700. Multiple clamping positions 700 can be provided and symmetrically arranged. After pre-stacked with the assistance of positioning pins, the first end face sealing plate 200 and the second end face sealing plate 300 can be clamped with a C-shaped clamp, thereby facilitating production transportation or further welding.

[0084] Furthermore, the first end face sealing plate 200 and the second end face sealing plate 300 are both provided with a manifold 800. The manifold 800 is connected to and communicates with the main channel 400 of the high-efficiency heat exchanger to ensure smooth circulation of the refrigerant or the substance to be heat exchanged.

[0085] In order to make the main channel 400 more unobstructed, in this embodiment 2, the first flow plate 112 is further provided with a flow slot 1128, the width of which is greater than the receiving slot 1126, and the flow slot 1128 matches the reinforcing rib 1119. After stacking, the flow slot 1128 matches the heat exchange area communication port on the pad to form a leaping channel inside the heat exchange area.

[0086] In this specification, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0087] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "some embodiments", "other embodiments" or "specific example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0088] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A high efficiency heat exchanger, characterized in that: include: The heat exchange mechanism comprises a plurality of mutually stacked heat exchange components, each of which comprises a first pad, a first flow plate, a second pad and a second flow plate which are stacked in sequence. The first gasket and the second gasket are identical and are arranged 90 degrees apart from each other, and the first flow plate and the second flow plate are identical and are arranged 90 degrees apart from each other, forming a main channel and a secondary channel that are not connected to each other. The main channel includes a first main channel and a second main channel that are interconnected, and the side channel includes a first side channel and a second side channel that are interconnected; The first end surface sealing plate is provided with a first inlet and a first outlet, the first inlet is connected to the first main channel, and the first outlet is connected to the second main channel. The second end surface sealing plate is provided with a second inlet and a second outlet, the second inlet is communicated with the first auxiliary channel, and the second outlet is communicated with the second auxiliary channel.

2. The high-efficiency heat exchanger according to claim 1, characterized in that: The first pad is provided with a first pad main through hole and a second pad main through hole symmetrically arranged, the first pad is also provided with a first pad auxiliary through hole and a second pad auxiliary through hole symmetrically arranged, and the first pad is also provided with a pad hollow hole. The first flow plate is provided with a first main flow plate opening and a second main flow plate opening which are symmetrically arranged, the first flow plate is also provided with a first secondary flow plate opening and a second secondary flow plate opening which are symmetrically arranged, and the first flow plate is also provided with an inner concave cavity, After stacking, the first main through hole of the pad matches with the first main through port of the flow plate to form the first main channel, the second main through hole of the pad matches with the second main through port of the flow plate to form the second main channel, the hollow hole of the pad and the inner concave cavity form a heat exchange area, and the first main channel is connected with the second main channel in a spanning connection through the heat exchange area; The first main through hole of the second pad is matched with the first secondary through port of the first flow plate to form the first secondary channel, the second main through hole of the second pad is matched with the second secondary through port of the first flow plate to form the second secondary channel, the hollow hole of the second pad and the inner concave cavity of the first flow plate form a heat exchange area, and the first secondary channel is connected with the second secondary channel through the heat exchange area in a spanning manner.

3. The high-efficiency heat exchanger according to claim 2, characterized in that: The first pad is also provided with an external connection opening, and the external connection opening is connected with the main channel and the heat exchange area after stacking.

4. The high-efficiency heat exchanger according to claim 3, characterized in that: The first pad is further provided with a main channel inner connecting opening, and the main channel inner connecting opening is connected to a plurality of the first main channels or a plurality of the second main channels; The first pad is further provided with a secondary channel inner opening, and the secondary channel inner opening is connected to a plurality of the first secondary channels or a plurality of the second secondary channels.

5. The high-efficiency heat exchanger according to claim 4, characterized in that: The first pad is further provided with reinforcing ribs, and the first flow plate is further provided with a receiving groove, and the receiving groove matches the reinforcing ribs.

6. The high-efficiency heat exchanger according to claim 5, characterized in that: A guide island is provided on the first flow plate, and the guide island is provided in the inner concave cavity.

7. The high-efficiency heat exchanger according to claim 1, characterized in that: The first end face sealing plate or the second end face sealing plate both include a safety valve, and the first end face sealing plate or the second end face sealing plate both have an accommodating cavity; The safety valve comprises a positioning plug, an elastic member and a piston. The positioning plug causes the piston to slide against the accommodating cavity through the elastic action of the elastic member.

8. The high-efficiency heat exchanger according to claim 7, characterized in that: The first end face sealing plate and the second end face sealing plate are both provided with clamping positions.

9. The high-efficiency heat exchanger according to claim 8, characterized in that: The first end face sealing plate and the second end face sealing plate are both provided with a collecting port.

10. The high-efficiency heat exchanger according to claim 5, characterized in that: The first flow plate is further provided with a flow groove, the width of the flow groove is greater than the accommodating groove, and the flow groove matches the reinforcing rib.

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