A heat exchanger

Abstract

The application provides a heat exchanger, and belongs to the technical field of plate heat exchangers. The heat exchanger comprises a plurality of heat exchange plate bundles, the heat exchange plate bundle comprises a first plate body and a second plate body, a refrigerant channel is formed between adjacent heat exchange plate bundles, and a cold carrier channel is formed between the first plate body and the second plate body; the first plate body is provided with a plurality of first point waves in a honeycomb array, a plurality of second point wave groups are arranged around each first point wave, and the protruding directions of the first point waves and the second point wave groups are opposite; the second point wave group comprises a first linear point wave and a Z-shaped point wave; the second plate body is provided with a plurality of third point waves corresponding to the first point waves in one-to-one correspondence, a plurality of fourth point wave groups are arranged around each third point wave, and the fourth point wave groups correspond to the second point wave groups; and the protruding directions of the third point waves and the fourth point wave groups are opposite.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of plate heat exchangers, and particularly relates to a heat exchanger. BACKGROUND

[0002] The brazed plate heat exchanger is a high-efficiency heat exchange device formed by stacking a plurality of heat exchange plates and performing brazing processing, channels for fluid medium flow are formed between adjacent plates, and different fluid media on both sides of the heat exchange plates are exchanged through the heat exchange plates.

[0003] In the prior art, the corrugated structure of the heat exchange plate is usually a herringbone corrugated structure or a sinusoidal corrugated structure, and the heat exchange plate with the corrugated structure has limited adjustability.

[0004] Another corrugated structure is a heat exchange plate with a dimple-shaped concave-convex surface, and the more common one is that the concave-convex surfaces on both sides are circular patterns or simple shapes, and the heat exchange performance and pressure drop performance of the heat exchange plate are generally matched with the existing performance requirements, have poor flexibility, and are difficult to meet the requirements of the new energy efficiency standard for heat exchangers. SUMMARY

[0005] The application aims to solve the above problems in the prior art, and provides a heat exchanger which has the characteristics of high flexibility and can be selected according to the energy efficiency and performance requirements of the unit system in actual application.

[0006] The object of the application can be achieved by the following technical scheme:

[0007] A heat exchanger comprises a plurality of heat exchange plate bundles, each heat exchange plate bundle comprises a first plate body and a second plate body, a refrigerant channel is formed between adjacent heat exchange plate bundles, and a cold carrier channel is formed between the first plate body and the second plate body.

[0008] The first plate body has a plurality of first dimples in a honeycomb array, a plurality of second dimple groups are arranged around each first dimple, the first dimple and the second dimple group are opposite in convex direction, and the second dimple group comprises a first strip-shaped dimple and a Z-shaped dimple.

[0009] The second plate body has a plurality of third dimples corresponding to the first dimples in one-to-one correspondence, a plurality of fourth dimples are arranged around each third dimple, and the fourth dimples correspond to the second dimple groups; and the third dimple and the fourth dimple are opposite in convex direction.

[0010] The recesses of the first dimples and the third dimples are combined to form a cavity.

[0011] The second point wave group is connected with the fourth point wave to form a plurality of first flow channels and second flow channels in communication with a chamber, the first flow channel is larger in size than the second flow channel, and the chamber, the first flow channel and the second flow channel are combined to form the refrigerant channel.

[0012] In the heat exchanger, two first strip-shaped point waves and one Z-shaped point wave are arranged around each first point wave, or two first strip-shaped point waves and two Z-shaped point waves are arranged around each first point wave; the areas of the first point wave, the first strip-shaped point wave and the Z-shaped point wave increase in turn.

[0013] The first strip-shaped point wave array is arranged on the first plate body, and two adjacent first strip-shaped point waves form a point wave group structure, and the point wave group structure array is arranged on the first plate body.

[0014] In the heat exchanger, the volume of the first flow channel is twice the volume of the second flow channel.

[0015] In the heat exchanger, the fourth point wave group includes six triangular point waves arranged in a circumferential array around the third point wave, and the adjacent triangular point waves have equal spacing.

[0016] The two first strip-shaped point waves and the two triangular point waves form a first flow channel, and the Z-shaped point wave, the first strip-shaped point wave and the two triangular point waves form a first flow channel.

[0017] The first strip-shaped point wave and the two triangular point waves form a second flow channel, and the Z-shaped point wave and the four triangular point waves form three second flow channels.

[0018] In the heat exchanger, the fourth point wave group includes a plurality of second strip-shaped point waves and triangular point waves; the third point wave is surrounded by one second strip-shaped point wave and four triangular point waves, or one second strip-shaped point wave and five triangular point waves; the first strip-shaped point wave and the second strip-shaped point wave are arranged in parallel with the central axis, and the first strip-shaped point wave and the second strip-shaped point wave are the same in size.

[0019] The two first strip-shaped point waves and the two triangular point waves form a first flow channel, the Z-shaped point wave, the first strip-shaped point wave and the two triangular point waves form a first flow channel, and the two first strip-shaped point waves, the second strip-shaped point wave and the triangular point wave form a first flow channel.

[0020] The first strip-shaped point wave and the two triangular point waves form a second flow channel, the Z-shaped point wave and the four triangular point waves form three second flow channels, and the Z-shaped point wave, the second strip-shaped point wave and the two triangular point waves form two second flow channels.

[0021] In the heat exchanger, the fourth point wave group comprises a plurality of second strip-shaped point waves and triangular point waves, and each third point wave is surrounded by two second strip-shaped point waves and one triangular point wave;

[0022] The first strip-shaped point wave is arranged in parallel with the central axis of the second strip-shaped point wave;

[0023] The two first strip-shaped point waves and the two second strip-shaped point waves form a first flow channel, the Z-shaped point wave, the first strip-shaped point wave, the second strip-shaped point wave and the triangular point wave form a first flow channel, and the Z-shaped point wave, the first strip-shaped point wave and the two triangular point waves form a first flow channel.

[0024] The Z-shaped point wave, the four triangular point waves form three second flow channels, the first strip-shaped point wave and the two triangular point waves form a second flow channel, and the Z-shaped point wave and the two second strip-shaped point waves form a second flow channel.

[0025] In the heat exchanger, the fourth point wave group comprises a plurality of second strip-shaped point waves and triangular point waves; the third point wave is surrounded by two second strip-shaped point waves and three triangular point waves; and the first strip-shaped point wave is arranged in perpendicular to the central axis of the second strip-shaped point wave.

[0026] The Z-shaped point wave, the first strip-shaped point wave and the two triangular point waves form a first flow channel, the two first strip-shaped point waves and the two second strip-shaped point waves form a first flow channel, and the two first strip-shaped point waves and the two triangular point waves form a first flow channel.

[0027] The Z-shaped point wave, the first strip-shaped point wave and the second strip-shaped point wave form two second flow channels, the first strip-shaped point wave, the second strip-shaped point wave and the triangular point wave form a second flow channel, and the Z-shaped point wave, the two second strip-shaped point waves and the two triangular point waves form three second flow channels.

[0028] Compared with the prior art, the application has the following advantages:

[0029] When the refrigerant flows into the first flow channel or the second flow channel, the refrigerant medium flow is hindered, the fluid flow is accelerated in the narrow space, the stability of the boundary layer is destroyed, local vortex and secondary flow are formed, the mixing degree of the fluid is increased, and the local heat transfer coefficient is improved. In the phase change scene, the high flow rate and the pressure difference change caused by entering the flow channel can promote the refrigerant phase change process and strengthen the phase change heat transfer. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic view of the first plate body and the second plate body of embodiment 1;

[0031] Figure 2 is a schematic view of the first plate body and the second plate body of Example 1 after being overlapped;

[0032] Figure 3 is a partial perspective view of Example 1;

[0033] Figure 4 is a schematic view of the first flow channel and the second flow channel of Example 1;

[0034] Figure 5 is a schematic view of the first plate body and the second plate body of Example 2;

[0035] Figure 6 is a schematic view of the first plate body and the second plate body of Example 2 after being overlapped;

[0036] Figure 7 is a schematic view of the first flow channel and the second flow channel of Example 2;

[0037] Figure 8 is a partial perspective view of Example 2;

[0038] Figure 9 is a schematic view of the first plate body and the second plate body of Example 3;

[0039] Figure 10 is a schematic view of the first plate body and the second plate body of Example 3 after being overlapped;

[0040] Figure 11 is a schematic view of the first flow channel and the second flow channel of Example 3;

[0041] Figure 12 is a partial perspective view of Example 3;

[0042] Figure 13 is a schematic view of the first plate body and the second plate body of Example 4;

[0043] Figure 14 is a schematic view of the first plate body and the second plate body of Example 4 after being overlapped;

[0044] Figure 15 is a schematic view of the first flow channel and the second flow channel of Example 4;

[0045] Figure 16 is a partial perspective view of Example 4;

[0046] Figure 17 is a resistance coefficient diagram of the primary side and the secondary side of Examples 1-4;

[0047] Figure 18 is a heat exchange performance diagram of the primary side and the secondary side of Examples 1-4;

[0048] In the drawings,

[0049] 100, heat exchange plate bundle; 101, refrigerant passage; 1011, chamber; 1012, first flow channel; 1013, second flow channel; 102, carrier fluid passage;

[0050] 2, first plate body; 21, first point wave; 22, second point wave group; 221, first strip-shaped point wave; 222, Z-shaped point wave;

[0051] 3, second plate body; 31, third point wave; 32, fourth point wave; 321, second strip-shaped point wave; 322, triangular point wave. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0053] As Figures 1-16As shown, a heat exchanger comprises: a plurality of heat exchange plate bundles 100, the heat exchange plate bundle 100 comprising a first plate body 2 and a second plate body 3, a refrigerant passage 101 being formed between adjacent heat exchange plate bundles 100, and a carrier coolant passage 102 being formed between the first plate body 2 and the second plate body 3; the first plate body 2 has a plurality of first point waves 21 in a honeycomb array, each first point wave 21 being surrounded by a plurality of second point wave groups 22, the first point wave 21 and the second point wave group 22 being opposite in protrusion direction; the second point wave group 22 comprises a first linear point wave 221 and a Z-shaped point wave 222; the second plate body 3 has a plurality of third point waves 31 corresponding to the first point waves 21 one by one, each third point wave 31 being surrounded by a plurality of fourth point wave groups 32 corresponding to the second point wave groups 22; the third point wave 31 and the fourth point wave group 32 are opposite in protrusion direction; the recesses of the first point wave 21 and the third point wave 31 combine to form a cavity 1011; the second point wave group 22 and the fourth point wave group 32 are connected to form a plurality of first flow channels 1012 and second flow channels 1013 in communication with the cavity 1011, the size of the first flow channel 1012 being larger than that of the second flow channel 1013, and the cavity 1011, the first flow channel 1012 and the second flow channel 1013 combining to form the refrigerant passage 101. In this application, during operation of the heat exchanger, the refrigerant flows in the refrigerant passage 101 formed between adjacent heat exchange plate bundles 100, and the carrier coolant flows in the carrier coolant passage 102 between the first plate body 2 and the second plate body 3, when the refrigerant and the carrier coolant flow through their respective passages, heat exchange between the two is carried out through the plate body. The size difference directly leads to the volume difference, for example, the volume of the first flow channel 1012 can be twice that of the second flow channel 1013.

[0054] Specifically, in the refrigerant passage 101, the cavity 1011 formed by the recesses of the first point wave 21 and the third point wave 31, and the first flow channel 1012 and the second flow channel 1013 formed by the connection of the second point wave group 22 and the fourth point wave group 32, together constitute a complex and orderly refrigerant flow path, the refrigerant flows in the cavity 1011, the flow channels of different sizes, and constantly changes the flow direction and speed, enhancing the degree of turbulence of the fluid.

[0055] When the refrigerant flows from the cavity 1011 into the first flow channel 1012 or from the cavity 1011 into the second flow channel 1013, the refrigerant medium flow is hindered, the fluid flow is accelerated in the narrow space, the stability of the boundary layer is destroyed, local vortex and secondary flow are formed, the mixing degree of the fluid is increased, and the local heat transfer coefficient is improved. In the phase change scenario, high flow rate and pressure difference caused by entering the flow channel can promote the refrigerant phase change process and strengthen the phase change heat transfer.

[0056] The first point wave 21, the second point wave group 22, the third point wave 31 and the fourth point wave group 32 cooperate with each other to form a concave-convex complex surface, increase the contact area of the fluid and the heat exchange plate, in addition, different shapes of point waves, such as the first strip-shaped point wave 221 and the Z-shaped point wave 222, form different obstruction effects, and different sizes of flow channels, such as the first flow channel 1012 being larger than the second flow channel 1013, the fluid flows through the complex flow channel with variable cross section formed by the combination of the first flow channel 1012 and the second flow channel 1013, presents multi-dimensional flow, enhances the turbulence degree of flow, improves the heat exchange performance, and meets the demand for high-efficiency heat exchange in the field of heat pump air conditioners and the like.

[0057] The second point wave group 22 is divided into different types according to the structure, and the sizes of the flow channels are different, which provides flexibility for the flow and flow rate control of the fluid. By reasonably designing the structure of the point wave and the flow channel, the flow state of the refrigerant in the channel can be adjusted according to the actual working condition, the fluid distribution is optimized, the heat exchanger can realize efficient and stable heat exchange under different operating conditions, and the adaptability of the equipment to complex working conditions is improved.

[0058] Further, the first point wave 21 and the third point wave 31 have the same structure, and after subsequent brazing, the bottom of the first point wave 21 is connected to the top of the third point wave 31.

[0059] The shapes of the second point wave group 22 and the fourth point wave group 32 are consistent, and when the first plate body 2 and the second plate body 3 are stacked, the top of the second point wave group 22 and the bottom of the fourth point wave group 32 are locally welded and connected.

[0060] Specifically, two first strip-shaped point waves 221 and one Z-shaped point wave 222 are arranged around each first point wave 21, or two first strip-shaped point waves 221 and two Z-shaped point waves 222 are arranged around each first point wave 21; the areas of the first point wave 21, the first strip-shaped point wave 221 and the Z-shaped point wave 222 increase in turn;

[0061] Among them, the first strip-shaped point wave 221 is arrayed distributed on the first plate body 2, so as to form a point wave group structure with two adjacent first strip-shaped point waves 221, such as Figure 1 as shown by mark Z in the figure, the point wave group structure is arrayed distributed on the first plate body 2.

[0062] In the present application, there are two cases on the first plate body 2, the first case is that two first strip-shaped point waves 221 and one Z-shaped point wave 222 are arranged around each first point wave 21, and the second case is that two first strip-shaped point waves 221 and two Z-shaped point waves 222 are arranged around each first point wave 21, and the first case and the second case exist on the first plate body 2 at the same time.

[0063] The shortest distances between the first point wave 21 and the second point wave group 22 are the same.

[0064] As Figure 1 S1: two first strip point waves 221 and one Z-type point wave 222 are arranged around each first point wave 21. S2: two first strip point waves 221 and two Z-type point waves 222 are arranged around each first point wave 21.

[0065] Specifically, the volume of the first flow channel 1012 is twice the volume of the second flow channel 1013. Specifically as Figure 4 、 Figure 7 、 Figure 11 、 Figure 15 shown. When the side walls of the point waves are all boundaries in the first plate body 2 and the second plate body 3, the first flow channel 1012 can be formed, and when the wave tops of the point waves are boundaries, the second flow channel 1013 is formed, wherein the point waves are all forms including the second point wave group 22 and the fourth point wave group 32.

[0066] In example 1#, as Figures 1-4 shown, the fourth point wave group 32 includes six triangular point waves 322 arranged in a circumferential array around the third point wave 31, and the adjacent triangular point waves 322 have equal spacing;

[0067] Wherein, two first strip point waves 221 and two triangular point waves 322 combine to form a first flow channel 1012, and one Z-type point wave 222, one first strip point wave 221, and two triangular point waves 322 combine to form a first flow channel 1012.

[0068] Wherein, one first strip point wave 221 and two triangular point waves 322 combine to form a second flow channel 1013, and one Z-type point wave 222 and four triangular point waves 322 combine to form three second flow channels 1013.

[0069] The above four point wave combination structures exist in example 1# at the same time.

[0070] Two first strip point waves 221 and two triangular point waves 322 combine to form a first flow channel 1012 correspond Figure 4 to A1-A1 in FIG. 1; one Z-type point wave 222, one first strip point wave 221, and two triangular point waves 322 combine to form a first flow channel 1012 correspond Figure 4 to A2-A2 in FIG. 2; one first strip point wave 221 and two triangular point waves 322 combine to form a second flow channel 1013 correspond Figure 4 to A3-A3 in FIG. 3; and one Z-type point wave 222 and four triangular point waves 322 combine to form three second flow channels 1013 correspond Figure 4 to A4-A4 in FIG. 4.

[0071] In example 2#, asFigures 5-8 As shown in S3, the fourth point wave group 32 includes several second strip point waves 321 and triangular point waves 322; the third point wave 31 has one second strip point wave 321 and four triangular point waves 322 around it, as shown in S4. Figure 5 As shown in S3, the fourth point wave group 32 includes several second strip point waves 321 and triangular point waves 322; the third point wave 31 has one second strip point wave 321 and four triangular point waves 322 around it, as shown in S4. Figure 5 As shown in S4, there are two cases of one second strip point wave 321 and five triangular point waves 322 around the third point wave 31 in this application. The second strip point wave 321 is improved on the basis of the second plate body 3 in embodiment 1# by connecting some adjacent triangular point waves 322 together; the central axis of the first strip point wave 221 is parallel to that of the second strip point wave 321, and the size of the first strip point wave 221 is the same as that of the second strip point wave 321.

[0072] Among them, two first strip point waves 221 and two triangular point waves 322 combine to form a first flow channel 1012, a Z-shaped point wave 222, a first strip point wave 221, and two triangular point waves 322 combine to form a first flow channel 1012; two first strip point waves 221, a second strip point wave 321, and a triangular point wave combine to form a first flow channel 1012.

[0073] Among them, one first strip point wave 221 and two triangular point waves 322 combine to form a second flow channel 1013, one Z-shaped point wave 222 and four triangular point waves 322 combine to form three second flow channels 1013, and one Z-shaped point wave 222, one second strip point wave 321, and two triangular point waves 322 combine to form two second flow channels 1013.

[0074] The above six point wave combination structures exist in embodiment 2# at the same time.

[0075] Two first strip point waves 221, a second strip point wave 321, and a triangular point wave 322 combine to form a first flow channel 1012 corresponding to Figure 7 B1-B1 in FIG. 6; two first strip point waves 221 and two triangular point waves 322 combine to form a first flow channel 1012 corresponding to Figure 7 B2-B2 in FIG. 6; a Z-shaped point wave 222, a first strip point wave 221, and two triangular point waves 322 combine to form a first flow channel 1012 corresponding to Figure 7 B3-B3 in FIG. 6; one first strip point wave 221 and two triangular point waves 322 combine to form a second flow channel 1013 corresponding to Figure 7 B4-B4 in FIG. 6; one Z-shaped point wave 222 and four triangular point waves 322 combine to form three second flow channels 1013 corresponding to Figure 7The diagram of B5-B5 shows that a Z-shaped dot wave 222, a second strip-shaped dot wave 321, and two triangular dot waves 322 combine to form two second flow channels 1013. Figure 7 The diagram is shown in section B6-B6.

[0076] In Example 3#, as Figures 9-12 As shown, the fourth point wave group 32 includes several second strip-shaped point waves 321 and triangular point waves 322. Each third point wave 31 is surrounded by two second strip-shaped point waves 321 and three triangular point waves 322, as shown. Figure 9 As shown in S5;

[0077] The central axes of the first strip-shaped dot wave 221 and the second strip-shaped dot wave 321 are set parallel to each other;

[0078] Among them, two first strip-shaped dot waves 221 and two second strip-shaped dot waves 321 combine to form a first flow channel 1012, a Z-shaped dot wave 222, a first strip-shaped dot wave 221, a second strip-shaped dot wave 321 and a triangular dot wave 322 combine to form a first flow channel 1012; a Z-shaped dot wave 222, a first strip-shaped dot wave 221 and two triangular dot waves 322 combine to form a first flow channel 1012.

[0079] Among them, a Z-shaped dot wave 222 and four triangular dot waves 322 combine to form three second flow channels 1013; a first strip dot wave 221 and two triangular dot waves 322 combine to form one second flow channel 1013; a Z-shaped dot wave 222 and two second strip dot waves 321 combine to form one second flow channel 1013.

[0080] The combination of two first stripe-shaped spot waves 221 and two second stripe-shaped spot waves 321 forms a first flow channel 1012. Figure 11 The diagram of C1-C1 shows that a Z-shaped dot wave 222, a first strip dot wave 221, a second strip dot wave 321, and a triangular dot wave 322 combine to form a first flow channel 1012. Figure 11 The diagram of C2-C2 shows that a Z-shaped point wave 222 and four triangular point waves 322 combine to form three second flow channels 1013. Figure 11 The diagram of C3-C3 shows that a first strip-shaped dot wave 221 and two triangular dot waves 322 combine to form a second flow channel 1013. Figure 11 The diagram of C4-C4 shows that a Z-shaped dot wave 222 and two second strip-shaped dot waves 321 combine to form a second flow channel 1013. Figure 11 The diagram of C5-C5 shows that a Z-shaped dot wave 222, a first strip dot wave 221, and two triangular dot waves 322 combine to form a first flow channel 1012. Figure 11 The diagram of C6-C6 in the figure.

[0081] As shown in S6 of Figures 13-16 Fig. 4, the fourth point wave group 32 includes several second strip point waves 321 and triangular point waves 322; the third point wave 31 has two second strip point waves 321 and three triangular point waves 322 around it, as shown in S6 of Figure 13 Fig. 4; the first strip point wave 221 is arranged perpendicularly to the central axis of the second strip point wave 321;

[0082] Among them, one Z-shaped point wave 222, one first strip point wave 221, and two triangular point waves 322 combine to form a first flow channel 1012; two first strip point waves 221 and two second strip point waves 321 combine to form a first flow channel 1012; two first strip point waves 221 and two triangular point waves 322 combine to form a first flow channel 1012;

[0083] Among them, one Z-shaped point wave 222, one first strip point wave 221, and one second strip point wave 321 combine to form two second flow channels 1013; one first strip point wave 221, one second strip point wave 321, and one triangular point wave 322 combine to form a second flow channel 1013; one Z-shaped point wave 222, two second strip point waves 321, and two triangular point waves 322 combine to form three second flow channels 1013.

[0084] Two first strip point waves 221 and two second strip point waves 321 combine to form a first flow channel 1012, which corresponds to Figure 15 D1-D1 in Fig. 4; one Z-shaped point wave 222, one first strip point wave 221, and two triangular point waves 322 combine to form a first flow channel 1012, which corresponds to Figure 15 D2-D2 in Fig. 4; one Z-shaped point wave 222, one first strip point wave 221, and one second strip point wave 321 combine to form two second flow channels 1013, which correspond to Figure 15 D3-D3 and D6-D6 in Fig. 4, which is a design that simultaneously exists in two second flow channels 1013; one first strip point wave 221, one second strip point wave 321, and one triangular point wave 322 combine to form a second flow channel 1013, which corresponds to Figure 15 D4-D4 in Fig. 4; one Z-shaped point wave 222, two second strip point waves 321, and two triangular point waves 322 combine to form three second flow channels 1013, which correspond to Figure 15 D5-D5 in Fig. 4; two first strip point waves 221 and two triangular point waves 322 combine to form a first flow channel 1012, which corresponds to Figure 15 D7-D7 in Fig. 4;

[0085] The listed embodiments are all the same as the first plate, and the point wave form of the second plate is different.

[0086] In order to better illustrate the performance difference of several embodiments, the resistance coefficient and heat transfer performance comprehensive index (Nu / f 1 / 3 ) of 1#~4# main side and auxiliary side channels under the same working condition are given respectively.

[0087] The formula of the resistance coefficient is as follows:

[0088]

[0089] Among them , the resistance coefficient; , pressure drop (Pa); S, flow cross-sectional area (m 2 ); D h , hydraulic diameter (m); L, length (m); ρ, density (kg / m 3 ); , mass flow (kg / s).

[0090] The resistance coefficient reflects the pressure drop performance of the heat exchanger, and Nu / f 1 / 3 reflects the heat transfer performance of the heat exchanger. From the data of Figure 17 and Figure 18 , by adjusting the number, arrangement, and matching relationship of different point waves, the friction coefficient of the heat exchanger formed by the heat exchange plate combination on the main side can be adjusted in the range of 90%~160% based on example 1 (100%), and on the auxiliary side, it can be adjusted in the range of 100%~137%. The corresponding main side heat transfer performance comprehensive index (Nu / f 1 / 3 ) can be adjusted in the range of 89%~103.5%, and the auxiliary side can be adjusted in the range of 90%~100%. In actual application, it can be selected according to the energy efficiency and performance requirements of the unit system, and the flexibility is high. The main side refers to one side of the refrigerant channel 101, and the auxiliary side refers to one side of the cold carrier channel 102.

[0091] It should be noted that all directional indications in the embodiments of the present application, such as up, down, left, right, front, back, etc., are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, as shown in the drawings, and if the specific posture changes, the directional indications also change accordingly.

[0092] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. Meanwhile, the meaning of "and / or" appearing throughout the text is to include three schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes are satisfied at the same time. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of the person skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0093] The above components are all general standard components or components known to those skilled in the art, and their structure and principle can be known by those skilled in the art through technical manual or through conventional experimental methods.

[0094] The specific embodiments described herein are merely illustrative of the present application. Those skilled in the art can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the present application or exceed the scope defined by the appended claims.

Claims

1. A heat exchanger, characterized in that, include: A plurality of heat exchange plate bundles (100), the heat exchange plate bundles (100) including a first plate (2) and a second plate (3), a refrigerant channel (101) is formed between adjacent heat exchange plate bundles (100), and a refrigerant channel (102) is formed between the first plate (2) and the second plate (3). The first plate (2) has a plurality of first point waves (21) in a honeycomb array, and a second point wave group (22) is arranged around each first point wave (21). The first point waves (21) and the second point wave group (22) protrude in opposite directions. The second point wave group (22) includes a first strip point wave (221) and a Z-shaped point wave (222). The second plate (3) has a plurality of third point waves (31) that correspond one-to-one with the first point wave (21), and a fourth point wave group (32) is arranged around each third point wave (31), the fourth point wave group (32) corresponding to the second point wave group (22); the protrusion direction of the third point wave (31) and the fourth point wave group (32) is opposite. The depression of the first point wave (21) and the depression of the third point wave (31) combine to form a cavity (1011). The second point wave group (22) is connected to the fourth point wave group (32) to form a plurality of first flow channels (1012) and second flow channels (1013) that communicate with the chamber (1011). The size of the first flow channel (1012) is larger than that of the second flow channel (1013). The chamber (1011), the first flow channel (1012), and the second flow channel (1013) are combined to form the refrigerant channel (101). Two first strip-shaped point waves (221) and one Z-shaped point wave (222) are arranged around each first point wave (21), or two first strip-shaped point waves (221) and two Z-shaped point waves (222) are arranged around each first point wave (21); the areas of the first point wave (21), the first strip-shaped point wave (221) and the Z-shaped point wave (222) increase sequentially; The first strip-shaped dot wave (221) array is distributed on the first plate (2), and two adjacent first strip-shaped dot waves (221) form a dot wave group structure, and the dot wave group structure array is distributed on the first plate (2). The fourth point wave group (32) includes six triangular point waves (322) arranged in a circumferential array around the third point wave (31), and the spacing between adjacent triangular point waves (322) is equal; Among them, two first strip-shaped point waves (221) and two triangular point waves (322) combine to form a first flow channel (1012), and a Z-shaped point wave (222), a first strip-shaped point wave (221), and two triangular point waves (322) combine to form a first flow channel (1012). Among them, a first strip-shaped dot wave (221) and two triangular dot waves (322) combine to form a second flow channel (1013), and a Z-shaped dot wave (222) and four triangular dot waves (322) combine to form three second flow channels (1013).

2. The heat exchanger according to claim 1, characterized in that, The volume of the first flow channel (1012) is twice the volume of the second flow channel (1013).

3. The heat exchanger according to claim 1, characterized in that, Alternatively, the fourth point wave group (32) may include several second strip-shaped point waves (321) and triangular point waves (322); the third point wave (31) may be surrounded by one second strip-shaped point wave (321) and four triangular point waves (322), or one second strip-shaped point wave (321) and five triangular point waves (322); the first strip-shaped point wave (221) and the second strip-shaped point wave (321) may be arranged parallel to the central axis of the second strip-shaped point wave (321) and the first strip-shaped point wave (221) may be the same size as the second strip-shaped point wave (321); Among them, two first strip-shaped point waves (221) and two triangular point waves (322) combine to form a first flow channel (1012); a Z-shaped point wave (222), a first strip-shaped point wave (221), and two triangular point waves (322) combine to form a first flow channel (1012); two first strip-shaped point waves (221), a second strip-shaped point wave (321), and a triangular point wave (322) combine to form a first flow channel (1012). Among them, a first strip-shaped dot wave (221) and two triangular dot waves (322) combine to form a second flow channel (1013), a Z-shaped dot wave (222) and four triangular dot waves (322) combine to form three second flow channels (1013), and a Z-shaped dot wave (222), a second strip-shaped dot wave (321), and two triangular dot waves (322) combine to form two second flow channels (1013).

4. The heat exchanger according to claim 1, characterized in that, Or the fourth point wave group (32) includes several second strip point waves (321) and triangular point waves (322), with two second strip point waves (321) and one triangular point wave (322) arranged around each third point wave (31); The first strip-shaped dot wave (221) and the second strip-shaped dot wave (321) are arranged parallel to each other; Among them, two first stripe point waves (221) and two second stripe point waves (321) combine to form a first flow channel (1012); a Z-shaped point wave (222), a first stripe point wave (221), a second stripe point wave (321), and a triangular point wave (322) combine to form a first flow channel (1012); a Z-shaped point wave (222), a first stripe point wave (221), and two triangular point waves (322) combine to form a first flow channel (1012). Among them, a Z-shaped point wave (222) and four triangular point waves (322) are combined to form three second flow channels (1013); a first strip point wave (221) and two triangular point waves (322) are combined to form a second flow channel (1013); a Z-shaped point wave (222) and two second strip point waves (321) are combined to form a second flow channel (1013).

5. The heat exchanger according to claim 1, characterized in that, Or the fourth point wave group (32) includes several second strip point waves (321) and triangular point waves (322); the third point wave (31) is surrounded by two second strip point waves (321) and three triangular point waves (322); the first strip point wave (221) is perpendicular to the central axis of the second strip point wave (321); Among them, a Z-shaped point wave (222), a first strip point wave (221), and two triangular point waves (322) combine to form a first flow channel (1012); two first strip point waves (221) and two second strip point waves (321) combine to form a first flow channel (1012); two first strip point waves (221) and two triangular point waves (322) combine to form a first flow channel (1012). Among them, a Z-shaped point wave (222), a first strip point wave (221), and a second strip point wave (321) combine to form two second flow channels (1013); a first strip point wave (221), a second strip point wave (321), and a triangular point wave (322) combine to form one second flow channel (1013); a Z-shaped point wave (222), two second strip point waves (321), and two triangular point waves (322) combine to form three second flow channels (1013).

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