Radiator structure for nuclear power station and IGBT (Insulated Gate Bipolar Translator) power module
By dividing the nuclear power plant radiator structure into a first part and a second part, and adding an air guide channel between the heat dissipation core and the shell, the problem of large temperature rise differences of IGBTs was solved, uniform heat dissipation of IGBT components was achieved, and heat dissipation efficiency was improved.
Patent Information
- Application Number
- CN202422528018.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-10-18
AI Technical Summary
In existing technologies, the temperature rise difference between the two sets of IGBTs in the inverter module of a nuclear power plant is large, resulting in uneven heat dissipation.
Design a heat sink structure for nuclear power plants, dividing the heat sink core into a first part and a second part, and adding an air guide channel between the heat sink core and the shell. The air guide channel guides the cold air directly to the second part to ensure uniform heat dissipation for the two sets of IGBT elements.
By using partitioned design and guiding airflow channels, the heat dissipation of the two sets of IGBT components is made uniform, reducing temperature rise differences and improving heat dissipation efficiency.
Smart Images
Figure CN223730131U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to power module technical field, more specifically, relate to a radiator structure and IGBT power module for nuclear power station. BACKGROUND
[0002] The main component of inverter function module is IGBT, and IGBT will generate a large amount of heat due to its own loss in work, so IGBT is attached on the radiator, the radiator absorbs the heat generated by IGBT, and the airflow removes the heat of the radiator, thereby radiating IGBT.
[0003] In the prior art, two groups of IGBTs are required to be arranged due to the requirement of power density, and the two groups of IGBTs are generally distributed along the airflow direction. The external cold air enters the inside of the radiator through the air inlet of the radiator, and then passes through the positions of the two groups of IGBTs to take out the heat. Since the heat generated by IGBTs is roughly the same, when the cold air passes through the first group of IGBTs, the cold air has been absorbed and becomes hot air, which cannot provide sufficient cooling air for the second group of IGBTs, resulting in a large temperature rise difference between the two groups of IGBTs. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a radiator structure and IGBT power module for nuclear power station, and aims at solving the technical problem of large temperature rise difference between the two groups of IGBTs in the prior art.
[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing a radiator structure for nuclear power station, comprising:
[0006] A shell is penetrated in the circumferential direction. One end of the shell is an air inlet, and the other end is an air outlet.
[0007] A heat dissipation core is located in the shell and has a plurality of flow channels distributed at intervals. Each flow channel is in communication with the air inlet and the air outlet. The heat dissipation core is divided into a first part and a second part which are connected in sequence along the airflow direction.
[0008] Among them, the first part and the inner wall of the shell have a wind guide channel, the wind guide channel extends to the air inlet, and the wind guide channel is in communication with each flow channel. The wind guide channel is used to guide the cold air to the second part.
[0009] In a possible implementation, in the radial direction of the shell, the size of the flow channel is greater than or equal to the distance between the second part and the inner wall of the shell.
[0010] In some embodiments, one side of the first part forms the air guide channel with the inner wall of the shell; and the other sides of the first part are spaced apart from the inner wall of the shell by a distance less than or equal to the size of the flow channel in the radial direction of the shell.
[0011] In some embodiments, the heat dissipation core has a cuboid structure, the four peripheral edges of the first part are aligned with the four peripheral edges of the second part; and the opening area of the air inlet is greater than the opening area of the air outlet.
[0012] In one possible implementation, the heat dissipation core comprises:
[0013] a heat dissipation substrate; and
[0014] a plurality of heat dissipation fins distributed on the heat dissipation substrate, and each adjacent two heat dissipation fins form the flow channel; one end of the heat dissipation fin is connected to the heat dissipation substrate, and the other end is a free end;
[0015] In some embodiments, the free end of each heat dissipation fin of the first part is spaced apart from the inner wall of the shell to form the air guide channel.
[0016] In one possible implementation, the air outlet end of the heat dissipation core is flush with the air outlet.
[0017] In one possible implementation, the shell comprises:
[0018] a shell body surrounding the periphery of the heat dissipation core; one side of the shell body is provided with a notch corresponding to the first part; and
[0019] an outwardly extending plate covering the notch and connected to the shell body; the outwardly extending plate protrudes outwardly relative to the shell body; and the air guide channel is formed between the outwardly extending plate and the first part.
[0020] In some embodiments, the length of the outwardly extending plate is 1 / 3-1 / 2 of the length of the heat dissipation core in the direction of the air flow.
[0021] The heat dissipation structure for nuclear power plants has the following advantages: compared with the prior art, the heat dissipation structure for nuclear power plants of the utility model divides the heat dissipation core into a first part and a second part, the first part and the second part can respectively dissipate heat for a group of IGBT elements; cold air passes through the first part and the second part in sequence from the air inlet to dissipate heat for the two groups of IGBT elements; additionally, an air guide channel is additionally arranged between the heat dissipation core and the shell, the air guide channel can guide the cold air to directly pass to the second part, so that the second part can receive sufficient cold air, thereby ensuring that the two groups of IGBT elements are evenly cooled and the temperature rise difference of the two groups of IGBT elements is reduced.
[0022] The utility model also provides a kind of IGBT power module, comprising:
[0023] The radiator structure for nuclear power plant described above;And
[0024] Two groups of IGBT elements are respectively pasted on the radiator structure for nuclear power plant, and are distributed along the airflow direction interval;One group of the IGBT element corresponds to the first part, and another group of the IGBT element corresponds to the second part.
[0025] The IGBT power module provided by the utility model can make two groups of IGBT elements evenly radiate, and reduce the temperature rise difference of two groups of IGBT elements, since the radiator structure for nuclear power plant is used. BRIEF DESCRIPTION OF DRAWINGS
[0026] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiment or prior art description will be simply introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.
[0027] Figure 1 The structure diagram of the radiator structure for nuclear power plant provided by the embodiment of the utility model Figure 1 ;
[0028] Figure 2 The structure diagram of the radiator structure for nuclear power plant provided by the embodiment of the utility model Figure 2 ;
[0029] Figure 3 The explosion structure diagram of the radiator structure for nuclear power plant provided by the embodiment of the utility model
[0030] Figure 4 The structure diagram of the IGBT power module provided by the embodiment of the utility model Figure 1 ;
[0031] Figure 2 The structure diagram of the IGBT power module provided by the embodiment of the utility model Figure 6 ;
[0032] Figure 7 The explosion structure diagram of the IGBT power module provided by the embodiment of the utility model
[0033] Figure 1 The sectional view of the IGBT power module provided by the embodiment of the utility model.
[0034] In the drawing:
[0035] 1, shell; 11, air inlet; 12, air outlet; 13, shell body; 14, outer expansion plate;
[0036] 2, heat dissipation core; 21, first part; 22, second part; 23, heat dissipation base plate; 24, heat dissipation fin;
[0037] 3, air guide channel;
[0038] 4, IGBT element. DETAILED DESCRIPTION
[0039] In order to make the technical problems, technical schemes and beneficial effects of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and do not limit the utility model.
[0040] Please refer to Figure 4 and Figure 5 , the heat sink structure for nuclear power plant provided by the utility model will be described. The heat sink structure for nuclear power plant comprises a shell 1 and a heat dissipation core 2. The shell 1 is through in the circumferential direction; one end of the shell 1 is an air inlet 11, and the other end is an air outlet 12; the heat dissipation core 2 is located in the shell 1 and has a plurality of spaced flow channels, each flow channel is in communication with the air inlet 11 and the air outlet 12; the heat dissipation core 2 is divided into a first part 21 and a second part 22 which are sequentially connected in the airflow direction.
[0041] Among them, the first part 21 and the inner wall of the shell 1 have an air guide channel 3, the air guide channel 3 extends to the air inlet 11, and the air guide channel 3 is in communication with each flow channel, the air guide channel 3 is used for guiding the cold air to the second part 22.
[0042] The heat sink structure for nuclear power plant provided by the utility model is preferably applied to IGBT power module and is used for dissipating heat of two groups of IGBT elements 4. The two groups of IGBT elements 4 are attached to the heat sink, and the two groups of IGBT elements 4 are generally spaced in the airflow direction, and one group of IGBT elements 4 corresponds to the first part 21, and the other group of IGBT elements 4 corresponds to the second part 22, as shown in Figure 6 and Figure 2 .
[0043] The shell 1 can adopt the common plate structure in the prior art. The shell 1 wraps the heat dissipation core 2, and the airflow can only flow from the air inlet 11 to the air outlet 12.
[0044] The heat dissipation core 2 is used for receiving heat dissipated by the IGBT elements 4. The heat dissipation core 2 can adopt a heat dissipation fin structure common in the prior art. It should be noted that the first part 21 and the second part 22 can be an integral structure, and the outer dimensions of the two are equal. If it is an integral structure, although the heat dissipation core 2 is divided into the first part 21 and the second part 22, the boundary between the first part 21 and the second part 22 is a dashed line, which does not actually exist. Any dashed line between the two groups of IGBT elements 4 can be used as the boundary, or the end point of the air guide channel 3 can be used as the boundary. The first part 21 and the second part 22 can also be a split structure, and the outer dimensions of the two are equal or not equal. The specific form of the first part 21 and the second part 22 is not limited in the embodiment, as long as the first part 21 corresponds to one group of IGBT elements 4, and the second part 22 corresponds to the other group of IGBT elements 4.
[0045] The air guide channel 3 exists between the first part 21 and the inner wall of the shell 1, and the air guide channel 3 extends along the air flow direction. It can be understood that the air guide channel 3 is arranged side by side with the first part 21. Specifically, the air guide channel 3 can be formed between the first part 21 and the shell 1 by reducing the size of the first part 21, or the air guide channel 3 can be formed between the first part 21 and the shell 1 by enlarging the size of the shell 1. The specific form of forming the air guide channel 3 is not limited in the embodiment.
[0046] The external cold air enters the shell 1 through the air inlet 11. Most of the cold air passes through each flow channel to take away the heat emitted by the two groups of IGBT elements 4 from the air outlet 12. A small part of the cold air enters the air guide channel 3 and directly passes to the second part 22, and takes away the heat of the IGBT elements 4 corresponding to the second part 22 after passing through the second part 22. Since the second part 22 can directly receive cold air, the temperature difference between the second part 22 and the first part 21 can be reduced.
[0047] Compared with the prior art, the heat dissipation structure for nuclear power plants provided by the utility model divides the heat dissipation core 2 into the first part 21 and the second part 22, and the first part 21 and the second part 22 can respectively dissipate heat for one group of IGBT elements 4. The cold air enters the shell 1 through the air inlet 11 and then passes through the first part 21 and the second part 22 to dissipate heat for the two groups of IGBT elements 4. In addition, the air guide channel 3 is additionally arranged between the heat dissipation core 2 and the shell 1, the air guide channel 3 can guide the cold air to directly pass to the second part 22, so that the second part 22 can receive sufficient cold air, thereby ensuring that the two groups of IGBT elements 4 are evenly cooled and the temperature rise difference of the two groups of IGBT elements 4 is reduced.
[0048] In some embodiments, the structure shown in Figure 4 and Figure 2 may be used between the shell 1 and the heat dissipation core 2, and the specific structure is shown in Figure 4 and Figure 1In the radial direction of the shell 1, the size of the flow passage is greater than or equal to the distance between the second part 22 and the inner wall of the shell 1.
[0049] The air outlet end of the second part 22 is close to or aligned with the air outlet 12, which can be understood as the end of the heat dissipation core 2.
[0050] The radial direction of the shell 1 refers to the direction perpendicular to the direction of air flow. The size of the flow passage is greater than or equal to the distance between the second part 22 and the inner wall of the shell 1, which can be considered as a very small or even no distance between the second part 22 and the inner wall of the shell 1, so that the air flow can only flow through each flow passage and pass through the second part 22, thereby improving the ventilation efficiency and utilization rate and avoiding the phenomenon of air leakage.
[0051] In some embodiments, the structure between the shell 1 and the heat dissipation core 2 can also be as shown in Figure 5 and Figure 1 , referring to Figure 5 and Figure 3 , one side of the first part 21 and the inner wall of the shell 1 form an air guide channel 3; in the radial direction of the shell 1, the distance between the other side of the first part 21 and the inner wall of the shell 1 is less than or equal to the size of the flow passage.
[0052] The air inlet end of the first part 21 is close to or aligned with the air inlet 11, which can be understood as the beginning of the heat dissipation core 2.
[0053] In the radial direction of the shell 1, the distance between the other side of the first part 21 and the inner wall of the shell 1 is less than or equal to the size of the flow passage, which can be considered as a very small or even no distance between the other side of the first part 21 and the inner wall of the shell 1 except the side forming the air guide channel 3. In this way, the cold air can be divided into two paths, one of which flows through each flow passage, and the other of which flows to the air guide channel 3, and the cold air flowing through the flow passage does not exist the phenomenon of air leakage.
[0054] In addition, the air guide channel 3 formed between one side of the first part 21 and the inner wall of the shell 1 can also simplify the assembly method of the shell 1 and the heat dissipation core 2, as well as the structure of the shell 1 and the heat dissipation core 2.
[0055] In some embodiments, the heat dissipation core 2 can adopt the structure as shown in Figure 3 , referring to Figure 3 , the heat dissipation core 2 is a cuboid structure, the four peripheral edges of the first part 21 are aligned with the four peripheral edges of the second part 22; the opening area of the air inlet 11 is greater than the opening area of the air outlet 12.
[0056] The four peripheral edges of the first part 21 are aligned with the four peripheral edges of the second part 22, and the heat dissipation core 2 can be regarded as a one-piece structure, so that there is no obvious boundary between the first part 21 and the second part 22. The one-piece structure of the heat dissipation core 2 can simplify the structure and facilitate assembly with the shell 1 and the two groups of IGBT elements 4.
[0057] Since the heat dissipation core 2 is a one-piece structure, the opening area of the air inlet 11 is increased to ensure that the cold air is divided into two paths, most of the cold air passes through the flow passage, and a small part of the cold air enters the air guide passage 3.
[0058] In some embodiments, the heat dissipation core 2 described above can adopt the structure as shown in Figure 5 , Figure 6 and Figure 3 , and as shown in Figure 5 , Figure 6 and Figure 2 , the heat dissipation core 2 comprises a heat dissipation base plate 23 and a plurality of heat dissipation fins 24.
[0059] One end of each heat dissipation fin 24 is connected to the heat dissipation base plate 23, and the other end is a free end; a flow passage is formed between each adjacent two heat dissipation fins 24; and a distance exists between the free end of each heat dissipation fin 24 of the first part 21 and the inner wall of the shell 1 to form the air guide passage 3.
[0060] The IGBT elements 4 are attached to one side of the heat dissipation base plate 23; and the plurality of heat dissipation fins 24 are distributed at intervals on the other side of the heat dissipation base plate 23. The heat generated by the IGBT elements 4 is transmitted to the heat dissipation fins 24 through the heat dissipation base plate 23. The cold air passes through the flow passage to take away the heat of the heat dissipation fins 24.
[0061] The length, width and thickness of each heat dissipation fin 24 are equal. The length direction of the heat dissipation fin 24 is the airflow direction, one end of the width direction is connected to the heat dissipation base plate 23, and the other end is a free end.
[0062] In some embodiments, the heat dissipation core 2 described above can also adopt the structure as shown in Figure 4 and Figure 2 , and as shown in Figure 4 and Figure 3 , the air outlet end of the heat dissipation core 2 is flush with the air outlet 12, that is, the shell 1 does not protrude from the heat dissipation core 2, so as to optimize the structure of the heat dissipation core 2 and the shell 1 and reduce the occupied space of the shell 1.
[0063] Preferably, the air inlet end of the heat dissipation core 2 is flush with the air inlet 11.
[0064] In some embodiments, the shell 1 described above can adopt the structure as shown in Figure 6 , Figure 7 and Figure 3The structure is shown in FIGS. Figure 6 , Figure 7 and The shell 1 comprises a shell body 13 and an outwardly extending plate 14. The shell body 13 is wrapped around the periphery of the heat dissipation core 2; one side of the shell body 13 is provided with a notch corresponding to the first part 21; the outwardly extending plate 14 covers the notch and is connected with the shell body 13; the outwardly extending plate 14 protrudes outwardly relative to the shell body 13; and the air guide channel 3 is formed between the outwardly extending plate 14 and the first part 21.
[0065] The shell body 13 is spliced by sheet metal, and is not only penetrated along the axial direction, but also one side is an open side wrapped around both sides of the heat dissipation base plate 23. The shell body 13 can be regarded as comprising two side plates and a bottom plate connected with the two side plates. The bottom plate is provided with the notch.
[0066] The outwardly extending plate covers the notch and the outer periphery is connected with the two side plates and the bottom plate respectively. Since the heat dissipation core 2 is a one-piece structure and the widths of the first part 21 and the second part 22 are equal, the outwardly extending plate 14 protrudes outwardly relative to the bottom plate to form the air guide channel 3 with a spacing from the first part 21.
[0067] Preferably, the length of the outwardly extending plate 14 in the airflow direction is 1 / 3-1 / 2 of the length of the heat dissipation core 2. The outwardly extending plate 14 corresponds to the first part 21, i.e. corresponds to the IGBT elements 4 located upstream, and the air outlet side of the outwardly extending plate 14 is based on the IGBT elements 4 located downstream to ensure that all the cold air passing through the air guide channel 3 enters the second part 22.
[0068] Based on the same inventive concept, the application also provides an IGBT power module comprising the heat sink structure for nuclear power plants and two groups of IGBT elements 4. The two groups of IGBT elements 4 are respectively attached to the heat sink structure for nuclear power plants and are spaced apart along the airflow direction; one group of IGBT elements 4 corresponds to the first part 21, and the other group of IGBT elements 4 corresponds to the second part 22.
[0069] The IGBT power module provided by the application has the advantages that the heat dissipation core 2 is divided into the first part 21 and the second part 22, and the first part 21 and the second part 22 can respectively dissipate heat for one group of IGBT elements 4; the cold air passes through the first part 21 and the second part 22 in sequence from the air inlet 11 to dissipate heat for the two groups of IGBT elements 4; in addition, the air guide channel 3 is additionally arranged between the heat dissipation core 2 and the shell 1, the air guide channel 3 can guide the cold air to directly pass through the second part 22, so that the second part 22 can receive sufficient cold air, thereby ensuring that the two groups of IGBT elements 4 dissipate heat uniformly and reducing the temperature rise difference of the two groups of IGBT elements 4.
[0070] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A heat sink structure for a nuclear power plant, characterized by, The application relates to a radiator structure for a nuclear power plant. The radiator structure comprises a shell (1) penetrating in the circumferential direction; one end of the shell (1) is an air inlet (11), and the other end is an air outlet (12); and a heat dissipation core (2) is arranged in the shell (1) and comprises a plurality of spaced flow channels, each of the flow channels is communicated with the air inlet (11) and the air outlet (12), and the heat dissipation core (2) is divided into a first part (21) and a second part (22) which are sequentially connected in the air flow direction. The first part (21) and the inner wall of the shell (1) are provided with a wind guide channel (3) which extends to the air inlet (11) and is communicated with each of the flow channels, and the wind guide channel (3) is used for guiding the cold air to the second part (22). In the radial direction of the shell (1), the size of the flow channel is greater than or equal to the distance between the second part (22) and the inner wall of the shell (1).
2. The heat sink structure for nuclear power plants according to claim 1, characterized by One side of the first part (21) and the inner wall of the shell (1) form the wind guide channel (3); in the radial direction of the shell (1), the distance between the other side of the first part (21) and the inner wall of the shell (1) is less than or equal to the size of the flow channel.
3. The heat sink structure for nuclear power plants according to claim 2, characterized by The heat dissipation core (2) is a cuboid structure, the four peripheral edges of the first part (21) are aligned with the four peripheral edges of the second part (22), and the opening area of the air inlet (11) is greater than the opening area of the air outlet (12).
4. The heat sink structure for nuclear power plants according to claim 3, characterized by The heat dissipation core (2) comprises a heat dissipation substrate (23) and a plurality of heat dissipation fins (24) which are spaced on the heat dissipation substrate (23) and form the flow channel between each two adjacent heat dissipation fins (24); one end of the heat dissipation fin (24) is connected with the heat dissipation substrate (23), and the other end is a free end.
5. The heat sink structure for nuclear power plants according to claim 1, characterized by The free end of each of the heat dissipation fins (24) of the first part (21) and the inner wall of the shell (1) are provided with a distance to form the wind guide channel (3). The air outlet end of the heat dissipation core (2) is flush with the air outlet (12). The shell (1) comprises a shell body (13) which is arranged at the periphery of the heat dissipation core (2) and is provided with a notch which corresponds to the first part (21), and an outward expansion plate (14) which covers the notch and is connected with the shell body (13); the outward expansion plate (14) is outwardly protruded relative to the shell body (13) and forms the wind guide channel (3) between the outward expansion plate (14) and the first part (21). In the air flow direction, the length of the outward expansion plate (14) is 1 / 3-1 / 2 of the length of the heat dissipation core (2).
6. The heat sink structure for nuclear power plants according to claim 1, characterized by The application further relates to a radiator structure for a nuclear power plant.
7. The heat sink structure for nuclear power plants according to claim 1, characterized by 8. The heat sink structure for nuclear power plants according to claim 7, characterized by 9. An IGBT power module, characterized by, Two groups of IGBT elements (4) are respectively attached to the heat sink structure for the nuclear power plant and are distributed at intervals along the airflow direction; one group of the IGBT elements (4) corresponds to the first part (21), and the other group of the IGBT elements (4) corresponds to the second part (22).