Bottom plate assembly and heat exchanger

Abstract

The utility model provides a bottom plate assembly and a heat exchanger, the bottom plate assembly is suitable for the heat exchanger, the bottom plate assembly comprises a bottom plate, two communicating holes are arranged on the bottom plate at intervals, and the two communicating holes are respectively communicated with a first refrigerant port and a first joint on a heat exchange main body of the heat exchanger; the flow guide plate is connected with the bottom plate, and the flow guide plate is arranged on the side, away from the heat exchange body, of the bottom plate; the flow guide plate is provided with a flow guide groove and an opening part which are communicated, and the opening part is located on the side, close to the bottom plate, of the flow guide groove and communicated with the two communicating holes; wherein a plurality of riveting legs are further arranged on the flow guide plate, a plurality of riveting holes are formed in the bottom plate at intervals, and the riveting legs are riveted to the riveting holes in a one-to-one correspondence mode so that the flow guide plate can be positioned on the bottom plate; the problem that in the prior art, time and labor are wasted when a bottom plate of a heat exchanger is machined and assembled is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger technical field, specifically, bottom plate assembly and heat exchanger. BACKGROUND

[0002] Plate heat exchanger as high -efficient heat exchange equipment, is widely used in air conditioning system, hot water supply, frozen storage etc. industry, its core component is by the superposition of many metal sheets, carries out heat exchange through the small gap between the plates, makes the heat of fluid transfer from high temperature side to low temperature side, realizes the conversion of temperature. This heat exchanger because of its efficient, compact features, plays a key role in a variety of equipment, for example, in air conditioner is used to adjust indoor temperature, in hot water tank is used to heat domestic water, in frozen tank and freezer is used to maintain low temperature environment etc.

[0003] However, the bottom plate assembly of traditional plate heat exchanger usually adopts the combination structure of bottom plate and guide plate, and the bottom plate and the guide plate are made by machining, the structure is relatively complex, the guide passage, i.e. a plurality of connecting through holes, needs to be machined on the bottom plate, the machining difficulty is relatively large, and the production cost is relatively high, and the positioning between the bottom plate and the guide plate is relatively difficult, which requires high-precision machining and assembly technology and long machining and assembly time, not only increases the manufacturing difficulty, but also significantly improves the production cost, especially for large-scale production, the additional material and processing cost becomes an important factor restricting its economic benefit. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a bottom plate assembly and heat exchanger to solve the problem of time-consuming and laborious machining and assembly of the bottom plate of the heat exchanger in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a bottom plate assembly suitable for heat exchanger is provided, which comprises: a bottom plate, two communication holes are arranged on the bottom plate, the two communication holes are respectively communicated with a first refrigerant port and a first connector on a heat exchange main body of the heat exchanger; a guide plate connected with the bottom plate, the guide plate is arranged on the side of the bottom plate away from the heat exchange main body; the guide plate is provided with a guide groove and an opening part in communication, the opening part is located on the side of the guide groove close to the bottom plate and communicated with the two communication holes; wherein, a plurality of riveting legs are arranged on the guide plate, a plurality of riveting holes are arranged on the bottom plate, and the plurality of riveting legs are riveted one by one at the plurality of riveting holes to position the guide plate on the bottom plate.

[0006] Further, the flow guide plate comprises a ring-shaped connecting plate connected with the bottom plate; and a flow guide groove surrounding plate arranged on a side of the ring-shaped connecting plate away from the bottom plate and connected with the ring-shaped connecting plate to jointly enclose the flow guide groove with the ring-shaped connecting plate.

[0007] Further, the plurality of riveting legs are arranged on the ring-shaped connecting plate at intervals along a circumferential side of the ring-shaped connecting plate, and each of the riveting legs is located on a side of the ring-shaped connecting plate away from the flow guide groove surrounding plate.

[0008] Further, each of the riveting holes comprises a through hole section and a stepped hole section connected in sequence in a direction away from the ring-shaped connecting plate, and a cross-sectional area of the through hole section is smaller than that of the stepped hole section; each of the riveting legs comprises a plug-in section and a bent section connected in sequence in the direction away from the ring-shaped connecting plate, and a predetermined included angle is arranged between the plug-in section and the bent section; wherein the plug-in section of each of the riveting legs is arranged in the through hole section of the corresponding riveting hole, and the bent section of each of the riveting legs is tightly pressed in the stepped hole section after passing through the through hole section of the corresponding riveting hole.

[0009] Further, a depth of the stepped hole section is h, and a thickness of the riveting leg is t, wherein h≥t.

[0010] Further, the ring-shaped connecting plate and the bottom plate are welded.

[0011] Further, a width of the flow guide groove is greater than or equal to a hole diameter of the through hole; and / or a height of the flow guide groove is greater than or equal to a thickness of the bottom plate; and / or a material of the bottom plate comprises aluminum; and / or a material of the flow guide plate comprises aluminum; and / or the flow guide plate is formed by stamping; and / or the bottom plate is formed by stamping.

[0012] Further, a plurality of positioning holes are arranged at intervals on the bottom plate, and the plurality of positioning holes are plug-in matched with a plurality of positioning protrusions on the heat exchange main body to position the bottom plate and the heat exchange main body.

[0013] Further, a plurality of mounting holes are arranged at intervals on the bottom plate, and the bottom plate is connected with a to-be-mounted position through a plurality of fasteners corresponding one by one and penetrating the plurality of mounting holes.

[0014] According to another aspect of the present application, a heat exchanger is provided, comprising the above-mentioned bottom plate assembly; the heat exchanger further comprises a heat exchange main body and a first joint arranged at intervals, and a first refrigerant port on the heat exchange main body is connected with the first joint through the bottom plate assembly.

[0015] The technical scheme of the utility model discloses a bottom plate assembly suitable for a heat exchanger, the bottom plate assembly comprises: a bottom plate, two communication holes are arranged on the bottom plate at intervals, the two communication holes are communicated with a first refrigerant port and a first connector on a heat exchange main body of the heat exchanger respectively; a flow guide plate, the flow guide plate is connected with the bottom plate, and the flow guide plate is arranged on the side of the bottom plate away from the heat exchange main body; the flow guide plate is provided with a flow guide groove and an opening part communicated with each other, and the opening part is located on the side of the flow guide groove close to the bottom plate and communicated with the two communication holes; wherein, a plurality of riveting legs are further arranged on the flow guide plate, a plurality of riveting holes are arranged on the bottom plate at intervals, and the plurality of riveting legs are riveted in the plurality of riveting holes one by one to position the flow guide plate on the bottom plate. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the present application and its

[0017] Figure 1 Fig. 1 shows a structural schematic view of the bottom plate assembly in one direction according to the utility model;

[0018] Figure 2 Fig. 2 shows a structural schematic view of the bottom plate assembly in another direction according to the utility model; Figure 1

[0019] Figure 3 Figure 1

[0020] Figure 4 Figure 3

[0021] Figure 5 Figure 1

[0022] Figure 6 Figure 1 ​​​​​​​​A side view of the bottom plate assembly shown;

[0023] Figure 7 A structure diagram of the bottom plate of the bottom plate assembly shown is shown. Figure 1 A structure diagram of the bottom plate of the bottom plate assembly shown is shown.

[0024] Figure 8 A structure diagram of the bottom plate of the bottom plate assembly shown is shown. Figure 7 A structure diagram of the bottom plate of the bottom plate assembly shown is shown.

[0025] Figure 9 A structure diagram of the bottom plate of the bottom plate assembly shown is shown. Figure 7 A structure diagram of the bottom plate of the bottom plate assembly shown is shown.

[0026] Figure 10 A structure diagram of the bottom plate of the bottom plate assembly shown is shown. Figure 7 A structure diagram of the bottom plate of the bottom plate assembly shown is shown.

[0027] Figure 11 A structure diagram of the bottom plate of the bottom plate assembly shown is shown. Figure 1 A structure diagram of the bottom plate of the bottom plate assembly shown is shown.

[0028] Figure 12 A structure diagram of the bottom plate of the bottom plate assembly shown is shown. Figure 11 A structure diagram of the bottom plate of the bottom plate assembly shown is shown.

[0029] Figure 13 A structure diagram of the bottom plate of the bottom plate assembly shown is shown. Figure 11 A structure diagram of the bottom plate of the bottom plate assembly shown is shown.

[0030] Figure 14 A structure diagram of the bottom plate of the bottom plate assembly shown is shown. Figure 11 A structure diagram of the bottom plate of the bottom plate assembly shown is shown.

[0031] Wherein, the above drawings include the following reference signs:

[0032] 1, bottom plate; 11, communication hole; 12, riveting hole; 121, communication hole section; 122, stepped hole section; 13, positioning hole; 14, mounting hole;

[0033] 2, deflector; 21, deflector groove; 22, opening part; 23, annular connecting plate; 24, deflector groove surrounding plate; 25, riveting leg; 251, insertion section; 252, bending section. DETAILED DESCRIPTION

[0034] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0035] As Figures 1 to 14As shown, the utility model provides a kind of bottom plate assembly, it is applicable to heat exchanger, bottom plate assembly includes: bottom plate 1, two communication holes 11 are arranged on bottom plate 1 with interval, two communication holes 11 are respectively communicated with the first refrigerant port and the first joint on the heat exchange main body of heat exchanger;Baffle 2, baffle 2 is connected with bottom plate 1, baffle 2 is arranged on the side of bottom plate 1 away from heat exchange main body;Baffle 2 is provided with the flow guide groove 21 and the opening portion 22 of intercommunication, opening portion 22 is located on the side of flow guide groove 21 close to bottom plate 1 and is communicated with two communication holes 11;Wherein, baffle 2 is further provided with multiple riveting legs 25, multiple riveting holes 12 are arranged on bottom plate 1 with interval, multiple riveting legs 25 are riveted at multiple riveting holes 12 one by one, to position baffle 2 on bottom plate 1.

[0036] In this way, the bottom plate assembly of the utility model sets baffle 2 on bottom plate 1, to effectively guide the flow path of fluid between the first refrigerant port and the first joint, and by setting multiple riveting legs 25, it plays an auxiliary positioning role for the next sealing connection between bottom plate 1 and baffle 2, greatly reduces the processing and assembling difficulty of bottom plate assembly, strengthens the connection strength between bottom plate 1 and baffle 2, improves the stability of bottom plate assembly, greatly reduces the production difficulty of bottom plate assembly, and the structure of bottom plate assembly is simple and compact, the weight is lighter, reduces production cost and production efficiency, solves the problem of time-consuming and laborious processing and assembling of the bottom plate of heat exchanger in the prior art.

[0037] As shown, Figures 1 to 14 Baffle 2 includes: annular connecting plate 23, annular connecting plate 23 is connected with bottom plate 1;Flow guide groove surrounding plate 24, flow guide groove surrounding plate 24 is arranged on the side of annular connecting plate 23 away from bottom plate 1 and is connected with annular connecting plate 23, to form flow guide groove 21 with annular connecting plate 23, not only strengthens the stability of baffle 2, but also effectively prevents fluid leakage, is applicable to heat exchanger requiring high sealing performance, reduces the frequency of maintenance and repair.

[0038] Specifically, annular connecting plate 23 is welded with bottom plate 1, to realize the sealing connection between bottom plate 1 and baffle 2, to provide greater connection strength between bottom plate 1 and baffle 2, improve the durability of connection part, also strengthen the anti-vibration performance of bottom plate assembly, ensure the stability and reliability of bottom plate assembly when heat exchanger works, applicable to high-pressure, high-temperature heat exchange environment.

[0039] Preferably, the welding mode between annular connecting plate 23 and bottom plate 1 is vacuum brazing.

[0040] Further, sealing ring is further provided between annular connecting plate 23 and bottom plate 1, to further strengthen the sealing performance between annular connecting plate 23 and bottom plate 1.

[0041] As shown,Figures 1 to 14 As shown, the plurality of riveting legs 25 are arranged on the annular connecting plate 23 along the circumferential side of the annular connecting plate 23, each of the riveting legs 25 is located on the side of the annular connecting plate 23 away from the flow guide groove coaming 24, and plays a role in preliminary connection and positioning of the welding between the bottom plate 1 and the flow guide plate 2, greatly reduces the difficulty of processing and assembling of the bottom plate assembly, further strengthens the connection strength between the bottom plate 1 and the flow guide plate 2, and improves the stability of the bottom plate assembly.

[0042] As shown in the drawings, Figures 1 to 14 As shown, each of the riveting holes 12 includes a through hole section 121 and a stepped hole section 122 connected in sequence in the direction away from the annular connecting plate 23, the cross-sectional area of the through hole section 121 is smaller than that of the stepped hole section 122; each of the riveting legs 25 includes a plug-in section 251 and a bent section 252 connected in sequence in the direction away from the annular connecting plate 23, and the plug-in section 251 and the bent section 252 are arranged at a predetermined included angle; wherein the plug-in section 251 of each of the riveting legs 25 is inserted into the through hole section 121 of the corresponding riveting hole 12, and the bent section 252 of each of the riveting legs 25 is pressed in the stepped hole section 122 after passing through the through hole section 121 of the corresponding riveting hole 12. In this way, the connection between the bottom plate 1 and the flow guide plate 2 is more firm, ensuring the reliability of the connection between the bottom plate 1 and the flow guide plate 2, and ensuring the stability of the heat exchanger.

[0043] The assembly process of the bottom plate assembly of the utility model is as follows: firstly, the plurality of riveting legs 25 on the flow guide plate 2 are inserted into the plurality of riveting holes 12 on the bottom plate 1 one by one, then the annular connecting plate 23 of the flow guide plate 2 and the bottom plate 1 are welded, and finally the plurality of riveting legs 25 are sequentially bent, so that each of the riveting legs 25 forms the plug-in section 251 inserted into the through hole section 121 of the corresponding riveting hole 12 and the bent section 252 pressed in the stepped hole section 122 of the corresponding riveting hole 12.

[0044] Wherein, the depth of the stepped hole section 122 is h, and the thickness of the riveting leg 25 is t, wherein h≥t.

[0045] Specifically, the width of the flow guide groove 21 is greater than or equal to the hole diameter of the through hole 11; and / or the height of the flow guide groove 21 is greater than or equal to the thickness of the bottom plate 1, so that the flow guide groove can better adapt to the flow characteristics of different fluids, ensuring the full diffusion and uniform distribution of the fluid in the flow guide groove 21, avoiding uneven heat exchange caused by local high flow rate, and improving the heat exchange efficiency and operation stability of the heat exchanger.

[0046] Specifically, the manufacturing material of the bottom plate 1 includes aluminum; and / or the manufacturing material of the flow guide plate 2 includes aluminum; and / or the flow guide plate 2 is formed by stamping processing; and / or the bottom plate 1 is formed by stamping processing.

[0047] The selection of the above parameters, materials, and processing methods gives the base plate assembly good flow guidance and lightweight characteristics, saves materials, ensures production efficiency and cost control, and is conducive to the mass production and widespread application of heat exchangers.

[0048] Among them, the guide plate 2 can be an aluminum plate with a brazing layer material. When vacuum brazing with the base plate 1, no separate welding plate is needed, which reduces the required parts and lowers the production cost.

[0049] like Figures 1 to 10 As shown, the base plate 1 has multiple positioning holes 13 spaced apart. These positioning holes 13 engage with multiple positioning protrusions on the heat exchanger body to position the base plate 1 and the heat exchanger body. This combination of positioning holes 13 and protrusions not only enables rapid positioning between the base plate 1 and the heat exchanger body but also improves the consistency and reliability of their assembly, simplifies the assembly process, reduces errors during production, increases assembly accuracy, and enhances production efficiency and quality. This design is suitable for heat exchanger assembly on automated production lines.

[0050] like Figures 1 to 10 As shown, the base plate 1 is provided with a plurality of mounting holes 14 at intervals. The base plate 1 is connected to the installation position by a plurality of fasteners that are correspondingly inserted into the plurality of mounting holes 14, so that the base plate assembly can be easily connected to various installation positions, suitable for a variety of installation environments, and improving the versatility and adaptability of the heat exchanger.

[0051] This utility model also provides a heat exchanger, including the aforementioned base plate assembly; the heat exchanger further includes a heat exchange body and a first connector arranged at intervals, and the first refrigerant port on the heat exchange body and the first connector are connected by the base plate assembly. This not only improves the heat exchange efficiency of the heat exchanger, but also simplifies the manufacturing and maintenance process of the heat exchanger, effectively controls the production cost of the heat exchanger, and ensures the high quality and consistency of the heat exchanger, providing a solid foundation for the mass production and widespread application of the heat exchanger.

[0052] Specifically, the heat exchange body and the first connector are located on the same side of the base plate assembly and are both connected to the base plate assembly. The heat exchange body is composed of multiple flow plates stacked sequentially. The heat exchange body is also provided with a second refrigerant port, a third refrigerant port and a fourth refrigerant port. The second refrigerant port, the third refrigerant port and the fourth refrigerant port are all located on the side of the heat exchange body away from the first refrigerant port. The first refrigerant port and the second refrigerant port are connected to each other, and the third refrigerant port and the fourth refrigerant port are connected to each other.

[0053] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0054] The utility model discloses a bottom plate assembly suitable for heat exchanger, and the bottom plate assembly comprises: bottom plate 1, two communication holes 11 are arranged on the bottom plate 1 at intervals, the two communication holes 11 are communicated with the first refrigerant port and the first joint on the heat exchange main body of heat exchanger respectively, guide plate 2, the guide plate 2 is connected with the bottom plate 1, and the guide plate 2 is arranged on the side of the bottom plate 1 away from the heat exchange main body, the guide plate 2 is provided with guide groove 21 and opening portion 22 that are communicated, and the opening portion 22 is located on the side of the guide groove 21 close to the bottom plate 1 and is communicated with the two communication holes 11, wherein, a plurality of riveting legs 25 are further arranged on the guide plate 2, a plurality of riveting holes 12 are arranged on the bottom plate 1 at intervals, and the plurality of riveting legs 25 are riveted at the plurality of riveting holes 12 one by one to position the guide plate 2 on the bottom plate 1. In this way, the bottom plate assembly of the utility model sets the guide plate 2 on the bottom plate 1 to effectively guide the flow path of the fluid between the first refrigerant port and the first joint, and sets a plurality of riveting legs 25 to play a preliminary connecting and positioning role between the bottom plate 1 and the guide plate 2, strengthen the connecting strength between the bottom plate 1 and the guide plate 2, play an auxiliary positioning role for the next sealing connection between the bottom plate 1 and the guide plate 2, improve the stability of the bottom plate assembly, greatly reduce the production difficulty of the bottom plate assembly, and the structure of the bottom plate assembly is simple and compact, the weight is lighter, the production cost and production efficiency are reduced, and the problem of time-consuming and laborious processing and assembly of the bottom plate of the heat exchanger in the prior art is solved.

[0055] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0056] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application, unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale as the dimensions of the parts shown are for the purpose of illustration and description only. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and apparatus should be considered as being within the scope of the present application. In the examples shown and discussed herein, any specific values are to be interpreted as merely illustrative of the examples and are not to be construed as limiting. Thus, other examples of the example embodiments can have different values. It is noted that like numbers and letters refer to like elements throughout the following disclosure, and thus, once an element is defined in one drawing, that element does not need to be discussed further in subsequent drawings.

[0057] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, without the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0058] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0059] In addition, it should be noted that the use of "first", "second" and the like to define parts only facilitates the differentiation of corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as a limitation on the protection scope of the present application.

[0060] The above only describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A chassis assembly, characterized by, The bottom plate assembly is suitable for a heat exchanger, and comprises: a bottom plate (1) having two communication holes (11) arranged at intervals thereon, the two communication holes (11) being respectively communicated with a first refrigerant port and a first joint on a heat exchange main body of the heat exchanger; a flow guide plate (2) connected with the bottom plate (1), the flow guide plate (2) being arranged on a side of the bottom plate (1) away from the heat exchange main body, the flow guide plate (2) being provided with a flow guide groove (21) and an opening part (22) communicated with each other, the opening part (22) being located on a side of the flow guide groove (21) close to the bottom plate (1) and communicated with the two communication holes (11); wherein a plurality of riveting legs (25) are further arranged on the flow guide plate (2), a plurality of riveting holes (12) are arranged at intervals on the bottom plate (1), and the plurality of riveting legs (25) are riveted at the plurality of riveting holes (12) one by one to position the flow guide plate (2) on the bottom plate (1).

2. The chassis assembly of claim 1, wherein, The flow guide plate (2) comprises: a ring-shaped connecting plate (23) connected with the bottom plate (1); a flow guide groove surrounding plate (24) arranged on a side of the ring-shaped connecting plate (23) away from the bottom plate (1) and connected with the ring-shaped connecting plate (23) to jointly surround the flow guide groove (21) with the ring-shaped connecting plate (23).

3. The floor assembly of claim 2, wherein, The plurality of riveting legs (25) are arranged on the ring-shaped connecting plate (23) at intervals along a circumferential side of the ring-shaped connecting plate (23), and each riveting leg (25) is located on a side of the ring-shaped connecting plate (23) away from the flow guide groove surrounding plate (24).

4. The bottom plate assembly according to claim 3, wherein each riveting hole (12) comprises a communication hole section (121) and a stepped hole section (122) connected in sequence in a direction away from the ring-shaped connecting plate (23), a cross-sectional area of the communication hole section (121) being smaller than a cross-sectional area of the stepped hole section (122); each riveting leg (25) comprises a plug-in section (251) and a bent section (252) connected in sequence in a direction away from the ring-shaped connecting plate (23), the plug-in section (251) and the bent section (252) being arranged at a predetermined included angle; wherein the plug-in section (251) of each riveting leg (25) is inserted into the communication hole section (121) of the corresponding riveting hole (12), and the bent section (252) of each riveting leg (25) is pressed in the stepped hole section (122) after passing through the communication hole section (121) of the corresponding riveting hole (12).

5. The floor assembly of claim 4, wherein, A depth of the stepped hole section (122) is h, and a thickness of the riveting leg (25) is t, wherein h≥t.

6. The chassis assembly of claim 2, wherein, The ring-shaped connecting plate (23) and the bottom plate (1) are weldedly connected.

7. The bottom plate assembly according to claim 1, wherein a width of the flow guide groove (21) is greater than or equal to a hole diameter of the communication hole (11); and / or The height of the flow guide groove (21) is greater than or equal to the thickness of the bottom plate (1); and / or The material of the bottom plate (1) comprises aluminum; and / or The material of the flow guide plate (2) comprises aluminum; and / or The flow guide plate (2) is formed by stamping processing; and / or The bottom plate (1) is formed by stamping processing.

8. The chassis assembly of any one of claims 1-6, wherein, A plurality of positioning holes (13) are arranged on the bottom plate (1) in a spaced manner, and the plurality of positioning holes (13) are inserted and matched with a plurality of positioning protrusions on the heat exchange main body to position the bottom plate (1) and the heat exchange main body.

9. The chassis assembly of any one of claims 1-6, wherein, A plurality of mounting holes (14) are arranged on the bottom plate (1) in a spaced manner, and the bottom plate (1) is connected with a to-be-mounted position by a plurality of fasteners which are correspondingly arranged in the plurality of mounting holes (14).

10. A heat exchanger, characterized by The heat exchanger comprises the bottom plate assembly of any one of claims 1 to 9; and the heat exchanger further comprises a plurality of heat exchange main bodies and a first joint which are arranged in a spaced manner, and a first refrigerant port on the heat exchange main body and the first joint are connected through the bottom plate assembly.

Images