Liquid cooling unit

Abstract

The utility model relates to a liquid cooling unit which comprises a cover plate which comprises a body, a heat dissipation fin containing part, a liquid inlet, a liquid outlet, a liquid channel, at least one pair of first rib parts and second rib parts and heat dissipation fins which comprise fin plates and fins. The heat dissipation fins are fittingly engaged in the peripheral portions of the heat dissipation fin accommodating portions in their peripheral shapes and are fixedly held to the cover plate. The side, away from the component to be cooled, of the fin plate is provided with a fin-free area matched with the first rib part, and the fins are parallel to the first rib part and the second rib part. When the fins are assembled to the heat dissipation fin accommodating part, the side, opposite to the fin plate, of each fin abuts against and makes contact with the bottom of the heat dissipation fin accommodating part. The second rib is axially outward of the fin closest to the second tubular channel in a direction along the concave channel. The ends of the fins and the first and second ribs are each spaced apart from the peripheral portion by a certain distance. In this way, the space occupied by the liquid cooling unit can be saved, and the cooling efficiency can be ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to a liquid cooling unit. BACKGROUND

[0002] It is known that in a computing system, chip components such as GPUs need to be cooled to maintain their performance. Liquid cooling is widely used in the cooling process of chip components such as GPUs. However, the existing liquid cooling unit for directly contacting the chip components is usually oversized, especially in thickness, which leads to the failure to achieve a more compact layout, especially for rack-mounted processors with multiple chip components. Such oversize leads to the failure to install more chip components, resulting in space waste.

[0003] In addition, in view of the heat dissipation performance, it is necessary to ensure the hydraulic pressure (usually associated with flow rate) of the liquid flowing in the liquid cooling unit, so that the heat generated by the chip component can be quickly and sufficiently taken away. Therefore, it is necessary to ensure the strength of the liquid cooling unit itself to avoid excessive deformation or even rupture of the liquid cooling unit itself due to excessive hydraulic pressure, so that situations such as liquid leakage occur. CONTENT OF THE INVENTION

[0004] According to a first aspect of the present application, there is provided a liquid cooling unit configured to cool a component to be cooled, the component to be cooled being fixedly held by a corresponding carrier, comprising: - a cover plate comprising: a body in a plate-like shape; a heat dissipation fin accommodating portion provided in the body on a side facing the component to be cooled and having a bottom portion being at least a portion of a surface of the cover plate and a peripheral portion protruding from the cover plate around the bottom portion; an inlet and an outlet provided at opposite end portions of the body to introduce and discharge liquid, respectively; a liquid passage comprising a first tubular passage communicating the inlet and the heat dissipation fin accommodating portion, a second tubular passage communicating the outlet and the heat dissipation fin accommodating portion, and a concave passage in the bottom portion of the heat dissipation fin accommodating portion communicating the first tubular portion and the second tubular portion and opening on the side facing the component to be cooled; at least one pair of first ribs provided in the heat dissipation fin accommodating portion (110) and each crossing the concave passage symmetrically provided on both sides of the opening of the concave passage, respectively; a second rib crossing the concave passage continuously extending symmetrically across the concave passage at a distance from the second tubular passage in the concave passage, such that the second rib blocks the concave passage; - a heat dissipation fin comprising: a fin plate in a plate-like shape; and fins protruding from a side of the fin plate facing away from the component to be cooled; wherein the heat dissipation fin is engaged in the peripheral portion with its peripheral shape and fixedly held to the cover plate and forms a sealed space with the heat dissipation fin accommodating portion; wherein the fin plate is provided with finless areas on the side facing away from the component to be cooled for fitting the at least one pair of first ribs such that the first ribs are accommodated therein and the fins are parallel to the at least one pair of first ribs and the second rib; wherein the fins, when assembled to the heat dissipation fin accommodating portion, contact the bottom portion of the heat dissipation fin accommodating portion with a side opposite to the fin plate and cross the concave passage and extend symmetrically; wherein the second rib is axially outside of the fins closest to the second tubular passage in the direction of the concave passage such that all fins are spaced apart from the second tubular passage via the second rib; and wherein the fins and the end portions of the first ribs and the second rib are each spaced apart from the peripheral portion by a distance.

[0005] Optionally, the at least one first rib contacts the finless area on a side opposite to the fin plate; and / or, a thickness of the at least one first rib is greater than a thickness of the fins; and / or, a longitudinal rib protruding from the cover plate is formed in the cover plate on a side opposite to the component to be cooled along the first tubular passage, the concave passage, and the second tubular passage such that a respective at least a portion of the first tubular passage, the concave passage, and the second tubular passage extends in the longitudinal rib.

[0006] Optionally, the number of the second rib is one; and / or, a thickness of the second rib is not less than the thickness of the fins and not greater than a thickness of the first ribs; and / or, the second rib contacts a surface of the fin plate facing the second rib.

[0007] Optionally, the number of the first ribs is two pairs; and / or the fins, the at least one pair of the first ribs, and the second ribs are each perpendicular to the concave channel.

[0008] Optionally, the liquid cooling unit further comprises a fixed connecting part to fixedly hold the cover plate and the carrier when the fin plate covers the component to be cooled.

[0009] Optionally, the fixed connecting part is an independent clamping member, which comprises a clamping plate in a plate shape and cooperating with the carrier to clamp at least a portion of the cover plate when assembled, and a fixing piece to fixedly hold the clamping plate to the carrier.

[0010] Optionally, the fixing piece is a screw passing through a through hole provided in the clamping plate; and / or an elastic piece is provided between the head of the screw and the clamping plate; and / or the clamping plate further comprises a limiting part configured to match a cooperating part in the cover plate to prevent the cover plate from being displaced relative to each other; and / or the cooperating part is at least one through opening provided in at least a portion of the cover plate and the limiting part is a protrusion facing the cover plate, so that the protrusion can be accommodated in the at least one through opening; and / or the cover plate is a copper cover plate.

[0011] Optionally, the fixed connecting part is a screw passing through a through hole provided in the cover plate; and / or the cover plate is a steel cover plate; and / or the screws are uniformly distributed around the cover plate; and / or an elastic piece is provided between the head of the screw and the cover plate.

[0012] Optionally, the surface of the fin plate opposite to the component to be cooled when fixedly assembled to the cover plate is flush with the peripheral part; and / or the heat dissipation fins are fixedly assembled to the cover plate by brazing; and / or the heat dissipation fins are fixedly assembled to the cover plate by brazing through the at least one pair of the first ribs.

[0013] Optionally, the ends of the fins and the second ribs and the ends of the at least one first rib away from the concave channel are flush with one side of the peripheral part; and / or the thickness of the body of the cover plate is selected to be 2-5 mm; and / or the component to be cooled is a chip component.

[0014] By means of the present application, on the one hand, the size of the liquid cooling unit, especially the thickness, can be significantly reduced, even to an ultra-thin level, so that the space occupation of the liquid cooling unit is reduced, making it possible to save space of the entire computing system and to provide more chip components; on the other hand, the strength of the liquid unit itself can be ensured, so that the liquid can be supplied with desired hydraulic pressure, thereby ensuring the cooling efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Other remarkable features and advantages of the present application are derived from the following non-limiting description with reference to the following drawings provided for illustrative purposes, in which:

[0016] Figure 1 A perspective exploded schematic view of a liquid cooling unit according to a first embodiment of the present application is shown;

[0017] Figure 2 A bottom plan view of a cover plate of a liquid cooling unit according to a first embodiment of the present application is shown, wherein first and second rib portions in a heat sink fin receiving portion are shown;

[0018] Figure 3 A side plan view of a cover plate of a liquid cooling unit according to a first embodiment of the present application is shown;

[0019] Figure 4 A perspective view of a heat sink fin of a liquid cooling unit according to a first embodiment of the present application is shown;

[0020] Figure 5 A top view of a heat sink fin of a liquid cooling unit according to a first embodiment of the present application is shown;

[0021] Figure 6 A perspective schematic view of a heat sink fin and a cover plate of a liquid cooling unit according to a first embodiment of the present application in an assembled state is shown, wherein dashed lines indicate portions that are not directly visible inside;

[0022] Figure 7 A schematic view of a flow path of a liquid in a liquid cooling unit according to a first embodiment of the present application is shown;

[0023] Figure 8 A perspective exploded schematic view of a liquid cooling unit according to a second embodiment of the present application is shown; and

[0024] Figure 9 A perspective schematic view of a heat sink fin and a cover plate of a liquid cooling unit according to a second embodiment of the present application in an assembled state is shown, wherein dashed lines indicate portions that are not directly visible inside. DETAILED DESCRIPTION

[0025] The following description is merely exemplary in nature and is not intended to limit the present application and its application or uses. It is also understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.

[0026] Embodiments of the present application will be further described below with reference to the accompanying drawings. Although in the following embodiments of the present application, the extending direction of the liquid flow channel is defined as the longitudinal direction or the length direction, and the direction perpendicular to the longitudinal direction in the plate surface plane of the cover plate 100 is defined as the transverse direction or the width direction. The thickness direction of the cover plate 100 corresponds to the vertical direction. However, it needs to be understood that the cover plate 100 can be selected as any other appropriate shape without departing from the scope of the present application.

[0027] Reference will now be made to Figures 1-6 The detailed configuration of the liquid cooling unit 1 according to the first embodiment of the present application will be described below, wherein, Figure 1 A perspective exploded schematic view of the liquid cooling unit 1 according to the first embodiment of the present application is shown; Figure 2 A bottom plan view of the cover plate 100 of the liquid cooling unit 1 according to the first embodiment of the present application is shown; Figure 3 A right plan view of the cover plate 100 of the liquid cooling unit 1 according to the first embodiment of the present application is shown; Figure 4 A perspective view of the heat dissipation fin 200 of the liquid cooling unit 1 according to the first embodiment of the present application is shown; Figure 5 A top view of the heat dissipation fin 200 of the liquid cooling unit 1 according to the first embodiment of the present application is shown; Figure 6 A schematic view of the heat dissipation fin 200 of the liquid cooling unit 1 according to the first embodiment of the present application in an assembled state is shown.

[0028] As mentioned before, in the context of the present application, the liquid cooling unit 1 is configured to cool a component to be cooled (not shown), such as a chip component, including but not limited to a GPU chip. As an example, the liquid cooling unit 1 directly contacts a chip component, such as a GPU, to carry away heat generated and transferred by the chip component to the liquid cooling by the liquid flowing in the liquid unit to achieve cooling of the component to be cooled. As is well known in the art, these components to be cooled are usually fixedly held in a carrier, such as a circuit board, etc.

[0029] As Figure 1 shown, the liquid cooling unit 1 according to the first embodiment of the present application comprises a cover plate 100 and a heat dissipation fin 200. Preferably, the liquid cooling unit 1 further comprises a fixed connection portion 300 to fixedly hold the cover plate 100 to a carrier of the component to be cooled to achieve fixed holding of the liquid cooling unit 1.

[0030] As Figures 1-3 shown, the cover plate 100 comprises a body in a plate-like shape. In Figures 1-3In the embodiment of the figure, the plate-shaped form is a rectangular form comprising lugs on the two sides parallel to the longitudinal direction or a cross form, but this is merely exemplary and not limiting. Indeed, no limitation is imposed on the shape of the cover plate 100 within the scope of the present application, and the skilled person can make a corresponding design based on the position in which the component to be cooled is arranged and the configuration of the associated load-bearing portion, it being understood that variations of these shapes are also included in the scope of protection of the present application.

[0031] As Figures 1-3 indicated, the cover plate 100 comprises a heat dissipation fin accommodation portion 110 in which a heat dissipation fin 200 is configured to contact the component to be cooled and dissipate heat from the component to be cooled, the configuration of the heat dissipation fin 200 being described in more detail below, and not being described again here.

[0032] The heat dissipation fin accommodation portion 110 is provided on the side of the body facing the component to be cooled, for accommodating the heat dissipation fin 200 therein. The accommodation portion 110 is provided with a bottom portion 114 and a peripheral portion 112 projecting from the body of the cover plate 100 around the bottom portion 114. The bottom portion 114 is chosen to be at least a portion of the surface of the cover plate 100, in particular the surface of the body of the cover plate 100 facing the component to be cooled, so that the accommodation portion 110 is formed in a concave shape formed by the peripheral portion 112 around the bottom portion 114 to accommodate the heat dissipation fin 200 therein, as will also be described in more detail below, and not described again here.

[0033] As Figures 1-3 indicated, the cover plate 100 is also provided with a liquid inlet 102 and a liquid outlet 104 provided at opposite end portions of the body to introduce and extract liquid, in particular cooling liquid. More particularly, the liquid inlet 102 and the liquid outlet 104 introduce and extract liquid from the heat dissipation fin accommodation portion 110 so that the liquid can come into contact with the heat dissipation fin 200 to carry away heat. As will be understood by the skilled person, the liquid inlet 102 is connected to a liquid supply system to pump pressurized liquid to the liquid inlet 102 and drive the flow of liquid to the liquid outlet 104. The liquid leaving the liquid outlet 104 can be recirculated to the liquid supply after being cooled and supplied again to the liquid inlet 102.

[0034] As Figures 1-3 indicated, the cover plate 100 also comprises a liquid channel for guiding the flow of liquid. It is noted that in the embodiment of the present application, the liquid channel does not mean that the liquid can only flow in the liquid channel, but merely means a structure feature having a guiding effect in the form of a channel or the like. Indeed, the liquid can flow in areas outside the liquid channel, in particular in the heat dissipation fin accommodation portion 110, and the flow path of the liquid is not limited only to the structure of the liquid channel itself.

[0035] InFigures 1-3 In this embodiment, the liquid channel includes a first tubular channel connecting the inlet 102 and the heat dissipation fin receiving portion 110, and a second tubular channel connecting the outlet 104 and the heat dissipation fin receiving portion 110. In other words, the inlet 102 and the outlet 104 are respectively connected to the heat dissipation fin receiving portion 110 via the first and second tubular channels. Preferably, the first and second tubular channels are machined through the body of the cover plate 100 to achieve the connection between the inlet 102 and the outlet 104 and the heat dissipation fin receiving portion 110. The liquid channel also includes a concave channel 120 located in the bottom 114 of the heat dissipation fin receiving portion 110, connecting the first and second tubular channels. The concave channel 120 is open on the side facing the component to be cooled, that is, the concave channel 120 is in the form of an open channel open on the side facing the component to be cooled. As an example, the first and second tubular channels have a circular cross-sectional shape, but this is merely exemplary. The cross-sectional shape of the channel can be any suitable shape, such as a triangle, ellipse, polygon, or a closed shape composed of straight lines and curves, without departing from the scope of this application. Similarly, the cross-section of the concave channel 120 can be any open shape, such as a V-shape, open trapezoid, semicircle, or tunnel, without departing from the scope of this application. In fact, the shape of the cross-section of the liquid channel at various locations is not limited in the embodiments of this application, that is, any applicable shape is included.

[0036] like Figures 1-3 As shown, the cover plate 100 is also provided with at least one pair of first ribs 116 located between the ends of the concave channel 120. These first ribs 116 are disposed in the heat dissipation fin receiving portion 110, i.e., protruding from the bottom 114; and are located between the ends of the concave channel 120, i.e., distributed along the concave channel 120. However, it should be noted that each of the at least one pair of first ribs 116 is a certain distance from the end of the concave channel 120. Each of the at least one pair of first ribs 116 is symmetrically disposed on both sides of the opening of the concave channel 120 along a direction intersecting the concave channel 120. The positional relationship of the at least one pair of first ribs 116 is explained in detail below: First, the first ribs 116 are arranged in pairs on both sides of the concave channel 120 (both sides of the opening of the concave channel 120, i.e., both sides of the concave channel 120 in the transverse direction) to evenly distribute stress and strengthen the cover plate 100. Furthermore, the pair of first ribs 116 are symmetrically arranged with respect to the concave channel 120 to uniformly distribute possible stress and strengthen the cover plate 100. Each of the pair of first ribs 116 extends in a direction intersecting the concave channel 120. Preferably, one end of each of the pair of first ribs 116 is located at the edge of the opening of the concave channel 120, that is, in a plane perpendicular to the vertical direction or in a plane such as... Figure 2In the bottom view shown, each of the first ribs 116 intersects the opening edge of the concave channel 120. The direction in which this intersects the concave channel 120 is preferably perpendicular or nearly perpendicular to the concave channel 120. This is merely exemplary, and as those skilled in the art will understand and as will be described below, the actual extending direction of the first ribs 116 is related to the arrangement and construction of the fins 204 in the heat dissipation fins 200.

[0037] For example Figures 1-3 As shown, the cover plate 100 is also provided with a second rib 118, which extends symmetrically and continuously across the concave channel 120 at a certain distance from the second tubular channel in a direction intersecting the concave channel 120, thereby blocking the concave channel 120. In other words, unlike the separate and independent first ribs 116 arranged in pairs on both sides of the opening of the concave channel 120, the second rib 118 is continuous and blocks the concave channel 120 integrally or continuously. Of course, the respective extension directions of the second rib 118 on both sides of the concave channel 120 may be different, but obviously, these two respective portions are connected into one unit via a joint located at a general position in the concave channel 120, which blocks the concave channel 120.

[0038] Preferably, the heights of the first and second ribs, i.e., their dimensions in the vertical direction, can be chosen to be substantially the same. Furthermore, preferably, the extension direction of the portion of the second rib 118 located on one side of the concave channel 120 is parallel to the extension direction of the first rib 116 located on the same side.

[0039] Below, we will refer to Figures 4-5 The structure of the heat dissipation fins 200 of the liquid cooling unit 1 is described in detail.

[0040] like Figures 4-5 As shown, the heat dissipation fin 200 includes a fin plate 202, which is plate-shaped.

[0041] In addition, such as Figures 4-5 As shown, the heat dissipation fins 200 also include fins 204 that protrude from the side of the finned plate 202 opposite to the component to be cooled, thereby forming a grid-like shape. Optionally, these fins are thin plates protruding parallel to each other. Although each fin is not shown individually in the figures, those skilled in the art should understand that the area indicated by reference numeral 204 in the figures represents the area where the fins are located and may include a sufficient number of fins, rather than simply indicating the exact number of fins.

[0042] In this application Figures 1-6In the illustrated embodiment, the heat dissipation fin 200 is fixedly held in the cover plate 100 or the heat dissipation fin receiving portion 110 to prevent the heat dissipation fin 200 from detaching from the receiving portion 110. For example, the heat dissipation fin 200 can be brazed to the bottom 114 of the receiving portion 110 to ensure stability.

[0043] Furthermore, in the embodiments of this application, as described above, liquid will be supplied to the heat dissipation fin receiving portion 110. Therefore, when the heat dissipation fin 200 is received in the receiving portion 110, a sealed space needs to be formed to prevent liquid leakage. In other words, the heat dissipation fin 200 is fitted with the peripheral portion 112 by the peripheral shape of its fin plate 202 and is sealed to form a sealed space with the heat dissipation fin receiving portion 110, that is, to ensure the sealed engagement between the fin plate 202 and the peripheral portion 112.

[0044] Furthermore and optionally, in Figures 1-6 In the illustrated embodiment, the finned plate 202 has a finless region 206 on the side facing away from the component to be cooled, for accommodating at least one pair of first ribs 116. Therefore, the first ribs 116 can be accommodated, particularly in a form-fitting manner, within this finless region 206. That is, the position and shape of the finless region 206 on the finned plate 202 correspond to the positions of the respective first ribs 116 when the heat dissipation fins 200 are assembled into the receiving portion 110. Preferably, in embodiments of this application, the fins 204 are configured parallel to at least one pair of first ribs 116 and second ribs 118. This parallel design facilitates liquid guidance and ensures the maximization of the number of fins 204.

[0045] Furthermore and optionally, in Figures 1-6 In the illustrated embodiment, when the fins 204 are assembled to the heat dissipation fin receiving portion 110, they abut against the bottom 114 of the heat dissipation fin receiving portion 110 on the side opposite to the fin plate 202. Because the fins 204 can abut against the bottom 114, liquid from the liquid channels can flow between the individual fins 204.

[0046] As previously stated, the fin 204 is parallel to the first and second ribs 118, and therefore, the first and second ribs are also parallel to each other. In this case, each fin 204 extends in a direction intersecting the concave channel 120, as described in this application. Figure 3 As shown in the diagram. Preferably, these fins 204 extend symmetrically with respect to the fluid channels. This symmetrical arrangement helps ensure uniform fluid flow within the heat dissipation fin housing 110, resulting in a relatively uniform heat dissipation effect. In other words, in the embodiments of this application, preferably, the fins, the first and second ribs are symmetrically arranged with respect to the fluid channels to ensure a uniform and symmetrical distribution of the fluid.

[0047] Furthermore and optionally, inFigures 1-6 In the illustrated embodiment, the second ribs 118 are located axially outside the fins 204 closest to the second tubular passage in the direction of the concave passage 120 such that all the fins 204 are spaced apart from the second tubular passage via the second ribs 118. In other words, in the embodiments of the present application, the second ribs 118 are located between the fins 204 closest to the second tubular passage and the second tubular passage, such that liquid cannot directly communicate along the liquid passage to the second tubular passage, which configuration helps to direct the liquid flow in a manner more conducive to heat dissipation, which will be described in detail later. In addition, the ends of the fins 204 and the first and second ribs 118 are each spaced apart from the peripheral portion 112, that is, the fins 204, the first and second ribs are not in contact with the peripheral portion 112 but are located on the bottom portion 114 spaced apart from the peripheral portion 112. The ends of the fins 204, the first and second ribs form a surrounding passage portion with the peripheral portion 112 as a whole.

[0048] Before describing other features of the present application, reference is made herein to Figure 7 The liquid guiding based on the present application is described, wherein, Figure 7 A schematic diagram showing the flow path of liquid in the liquid cooling unit 1 according to the first embodiment of the present application is shown. Due to the presence of the concave passage 120 of the liquid passage and the first ribs 116 not interfering into the concave passage 120, the liquid can flow along the concave passage 120 and flow between the fins 204. However, due to the presence of the second ribs 118, it blocks the further direct flow of liquid in the concave passage 120, and since the fins 204, the first and second ribs do not contact the peripheral portion 112, the fins 204, the first and second ribs 118 form a surrounding passage portion between their ends and the peripheral portion 112, therefore, the blocking of the liquid by the second ribs 118 will force the liquid to flow along the second ribs 118 to flow on both sides and again gather between the second ribs 118 and the inlet of the second tubular passage to flow into the second tubular passage. Considering the hydraulic pressure of the liquid injected via the first tubular passage, it can be selectively achieved that even the liquid close to the first tubular passage away from the second ribs 118 also at least partially flows to the passage portion on both sides, so as to be able to reduce the presence of liquid with poor flowability between the fins 204. That is, without the second ribs 118, a considerable part of the liquid will directly flow out to the second tubular passage along the concave passage 120, the liquid flow between the fins 204 is poor, and therefore the heat dissipation effect is also limited. With the second ribs 118 of the present application, the liquid flowing into the containing portion 110 can be sufficiently driven to flow as much as possible, thereby helping to dissipate heat. As Figure 7As shown, due to the obstruction of the second rib 118 and the presence of the desired level of hydraulic pressure on the liquid, the liquid flowing into the heat dissipation fin receiving portion 110 is at least partially forced to flow to both sides at various locations, thereby significantly reducing the amount of liquid with poor flowability between the fins 204 compared to the prior art, thereby enhancing the heat dissipation performance.

[0049] Other optional or preferred features of this application will be described below.

[0050] like Figures 1-6 As shown in the embodiment, at least one first rib 116 abuts against the finless region 206 on its side opposite to the finned plate 202, that is, the first rib 116 abuts against the finless region 206. This configuration may help ensure the robustness of the heat dissipation fins 200 in the receiving portion 110 by means of processes such as brazing. Optionally or preferably, the thickness of at least one first rib 116 is greater than the thickness of the fins 204 to enhance the strength of the rib and thus further enhance the strength of the cover plate 100. Optionally or preferably, on the side of the cover plate 100 opposite to the part to be cooled, longitudinal ribs protruding from the cover plate 100 are formed along the first tubular channel, the concave channel 120, and the second tubular channel, such that at least a portion of the first tubular channel, the concave channel 120, and the second tubular channel extends in the longitudinal ribs. In other words, on the side of the cover plate 100 opposite to the component to be cooled, longitudinal ribs are provided in the longitudinal direction, and at least a portion of the liquid channels are disposed in the longitudinal ribs. That is, the first and second tubular channels in the liquid channels extend through the longitudinal ribs into the heat dissipation fin receiving portion 110, and the depth of the concave channel 120 is greater than the thickness of the cover plate 100 (i.e., the thickness of the plate excluding the longitudinal ribs), such that a portion of the concave channel 120 extends in the longitudinal ribs. Optionally, the longitudinal ribs and the cover plate 100 are integral components.

[0051] like Figures 1-6As shown in the embodiment, the number of second ribs 118 is one. Of course, this number is only exemplary, and those skilled in the art can set two or more second ribs 118 according to design needs without departing from the scope of this application. Optionally or preferably, the thickness of the second rib 118 is not less than the thickness of the fin 204 and not greater than the thickness of the first rib 116. Since the most important function of the second rib 118 is to block liquid from passing through the concave channel 120 and to guide the liquid to both sides, the thickness of the second rib 118 can be flexibly set to a certain extent. Considering the strength of the reinforcing cover plate 100, its thickness is generally selected to be thicker than the thickness of the wall fin 204 (the fin 204 is generally manufactured to be thin to increase the contact area with the liquid). On the other hand, in order not to interfere with the convergence of the guided liquid on the other side of the second rib 118, that is, to ensure that the second rib 118 is spaced at a sufficient distance from the second tubular channel without interfering with the outflow of the liquid, the thickness of the second rib 118 is usually set to be thinner than the first rib 116. However, the above-described thickness setting is merely exemplary, and those skilled in the art can reasonably select any suitable thickness of the second rib 118 according to their needs without departing from the scope of this application. Optionally or preferably, the second rib 118 abuts against the surface of the finned plate 202 facing it. Similar to the first rib 116, the construction of the second rib 118 abutting against the finned plate 202 may help ensure the robustness of the heat dissipation fins 200 in the receiving portion 110 by means of processes such as brazing.

[0052] like Figures 1-6 As shown in the embodiments, there are two pairs of first ribs 116. This number is merely exemplary, and those skilled in the art can provide one or more pairs of first ribs 116 according to design requirements without departing from the scope of this application. Preferably or optionally, the fins 204, at least one pair of first ribs 116, and second ribs 118 each extend perpendicularly to the concave channel 120. This perpendicular arrangement relative to the concave channel 120, i.e., relative to the liquid channel, facilitates the diversion and guidance of liquid under the action of the second ribs 118.

[0053] like Figures 1-6 As shown in the embodiment, the liquid cooling unit 1 also includes a fixing connection 300 to securely hold the cover plate 100 to the support portion when the finned plate 202 covers the component to be cooled. In practice, although described herein as fixing the liquid cooling unit 1 to the support portion, this is merely exemplary. The liquid cooling unit 1 can optionally be fixed to any other fixed location, such as a frame, as long as it ensures that the finned plate 202 of the liquid cooling unit 1 remains in contact with the component to be cooled.

[0054] like Figures 1-6 Especially Figure 1As shown in the embodiment, the fixed connection 300 is an independent clamping member, which includes: a clamping plate 302, which is plate-shaped and cooperates with the bearing portion to clamp at least a portion of the cover plate 100 during assembly; and a fastener 304, which fixes the clamping plate 302 to the bearing portion.

[0055] like Figures 1-6 As shown in the embodiments, especially Figure 1 As shown, the fastener 304 can be a screw passing through a through hole in the clamping plate 302, but this is merely exemplary and not limiting. Those skilled in the art can choose any fastener 304 capable of securing the clamping plate 302 to a support portion, without departing from the scope of this application, such as a rivet fastener 304, a bolt-nut fastener, a snap-fit ​​fastener, or adhesive. In the case of a screw, optionally or preferably, an elastic element 306 is provided between the screw head and the clamping plate 302 to ensure that the cover plate 100 is securely and tightly held to the support portion so that the heat dissipation fins 200 fully contact the component to be cooled. Of course, in the case of a rivet fastener or a bolt-nut fastener, such an elastic element 306 can also be similarly provided. Optionally or preferably, the clamping plate 302 also provides a limiting portion configured to mate with the mating portion 108 in the cover plate 100, particularly a form fit, to prevent the cover plate 100 from shifting relative to the clamping plate 302. As an example and preferably, the mating portion 108 is at least one opening provided in at least a portion of the cover plate 100, and the limiting portion is a protrusion (not shown) provided on the clamping plate 302 facing the cover plate 100, such that when the cover plate 100 is fixed to the support portion by means of the clamping member, the protrusion can be aligned and received, in particular, in a form fit, into the corresponding at least one opening, to prevent the cover plate 100 from moving relative to the clamping plate 302 and thus ensure that the cover plate 100 does not shift with the support portion on which the part to be cooled is located. Optionally or preferably, the cover plate 100 is a copper cover plate 100, which has good heat dissipation performance and flexibility, thus ensuring good heat dissipation effect.

[0056] like Figures 1-6 As shown in the embodiment, when the finned plate 202 is fixedly assembled to the cover plate 100, the surface opposite to the component to be cooled is flush with the peripheral portion 112. Optionally or preferably, the heat dissipation fins 200 are brazed and fixedly assembled to the cover plate 100, but this is merely exemplary, and those skilled in the art can use any suitable method to fix the heat dissipation fins 200 to the cover plate 100 without departing from the scope of this application. Optionally or preferably, the heat dissipation fins 200 are brazed and fixedly assembled to the cover plate 100 by means of at least one pair of first ribs 116. As mentioned above, since the thickness of the first ribs 116 is generally large, brazing the finned plate 202 by means of the first ribs 116 will obviously have better stability and strength.

[0057] As shown in the embodiment of Figures 1-6 the ends of the fins 204 and the second ribs 118 and the ends of the at least one first rib 116 distal to the concave channel 120 are flush with a side of the peripheral portion 112. That is, the channel portion is formed by the space between the ends of the fins 204 and the first and second ribs 118 and the peripheral portion 112 and the line connecting these ends is generally parallel to the peripheral portion 112. In other words, the length of the fins 204 and the second ribs 118 are generally the same as the overall extension of the pair of first ribs 116 including the opening width of the concave channel 120.

[0058] Optionally, the thickness of the body of the cover plate 100 (excluding the longitudinal ribs and the peripheral portion 112) is selected to be 2-5mm to achieve an ultra-thin or space saving design. Of course, this thickness selection is only exemplary and one skilled in the art can select a thinner or thicker thickness according to the design needs without departing from the scope of the present application. Optionally, the component to be cooled is a chip component, which has been described above and will not be repeated here.

[0059] The second embodiment of the liquid cooling unit 1 of the present application is described below with reference to Figure 8 and Figure 9 wherein Figure 8 shows a perspective exploded view of the liquid cooling unit 1 according to the second embodiment of the present application; and Figure 9 shows a bottom plan view of the cover plate 100 of the liquid cooling unit 1 according to the second embodiment of the present application. The main difference between the first and second embodiments is the configuration of the fixed connection portion 300. Except for the fixed connection portion 300, the other structures and configurations of the liquid cooling unit 1 in the first and second embodiments are generally the same and will not be additionally repeated here. In this second embodiment, as shown in Figures 8-9As shown, the fixing connecting part 300 is selected as a fixing member 304, such as a screw, passing through a through hole 310 directly arranged in the cover plate 100, without any clamping member structure. Those skilled in the art can select any fixing member 304 capable of directly fixing the cover plate 100 to any fixing connecting part 300, such as a bearing part, without departing from the scope of the present application, such as a rivet fixing member, a bolt-nut fixing member 304, a buckle fixing member 304, adhesion, etc. Alternatively or preferably, the cover plate 100 is a steel cover plate 100, in which case the steel cover plate 100 is capable of being directly provided with the through hole as described above due to its excellent strength per se. Alternatively or preferably, the through holes are uniformly distributed around the cover plate 100 or in the position area of the cover plate 100 interfacing with the bearing part, i.e., the screws are uniformly distributed around the cover plate 100 or in the position area of the cover plate 100 interfacing with the bearing part. Alternatively or preferably, an elastic member 306 is arranged between the head of the screw and the cover plate 100, which is similar in function to the elastic member 306 in the first embodiment, and will not be described herein again.

[0060] Although the embodiments of the present application are specifically described above in combination with the drawings, those skilled in the art can make various modifications or replacements to the above-described embodiments according to the teachings of the present application without departing from the scope of the present application.

Claims

1. A liquid cooling unit (1) configured to cool a component to be cooled, which is fixedly held to a corresponding load carrier, characterized in that, It comprises: - a cover plate (100) comprising: a body in the shape of a plate; a heat dissipation fin housing (110) provided in the body on a side facing the component to be cooled and having a bottom (114) which is at least a portion of a surface of the cover plate (100) and a peripheral portion (112) protruding from the cover plate (100) around the bottom (114); a liquid inlet (102) and a liquid outlet (104) provided at opposite end portions of the body to introduce and discharge liquid, respectively; a liquid passage comprising a first tubular passage connecting the liquid inlet (102) and the heat dissipation fin housing (110), a second tubular passage connecting the liquid outlet (104) and the heat dissipation fin housing (110), and a concave passage (120) in the bottom (114) of the heat dissipation fin housing (110) connecting the first tubular portion and the second tubular portion and opening on the side facing the component to be cooled, at least one pair of first ribs (116) provided in the heat dissipation fin housing (110) and each crossing the concave passage (120) symmetrically provided on both sides of the opening of the concave passage (120), respectively; and a second rib (118) crossing the concave passage (120) symmetrically continuously extending across the concave passage (120) at a distance from the second tubular passage in the concave passage (120) such that the second rib (118) blocks the concave passage (120); and - a heat dissipation fin (200) comprising: a fin plate (202) in the shape of a plate; and fins (204) protruding in the fin plate (202) on a side facing away from the component to be cooled; wherein the heat dissipation fin (200) is engaged in the peripheral portion (112) in the shape of its periphery and fixedly held to the cover plate (100) and forms a sealed space with the heat dissipation fin housing (110); wherein the fin plate (202) is provided on a side facing away from the component to be cooled with finless areas (206) for adapting the at least one pair of first ribs (116) such that the first ribs (116) are accommodated therein and the fins (204) are parallel to the at least one pair of first ribs (116) and the second rib (118); wherein the fins (204) abut against the bottom (114) of the heat dissipation fin housing (110) on a side opposite to the fin plate (202) when assembled to the heat dissipation fin housing (110) and cross the concave passage (120) and extend symmetrically; wherein the second rib (118) is axially outside the fins (204) closest to the second tubular passage in the direction of the concave passage (120) such that all fins (204) are spaced apart from the second tubular passage via the second rib (118); and The fins (204) and the end portions of the first and second ribs (116, 118) are each spaced apart from the peripheral portion (112) by a distance.

2. The liquid cooling unit (1) according to claim 1, characterized in that The at least one first rib (116) is in abutting contact with the finless area (206) on a side opposite to the fin plate (202); and / or, the thickness of the at least one first rib (116) is greater than the thickness of the fins (204); and / or, on a side of the cover plate (100) opposite to the component to be cooled, longitudinal ribs protruding from the cover plate (100) are formed along the first tubular channel, the concave channel (120) and the second tubular channel such that the respective at least one portion of the first tubular channel, the concave channel (120) and the second tubular channel extends in the longitudinal ribs.

3. The liquid cooling unit (1) according to claim 1, characterized in that The number of the second ribs (118) is one; and / or, the thickness of the second ribs (118) is not less than the thickness of the fins (204) and not greater than the thickness of the first ribs (116); and / or, the second ribs (118) abut a side surface of the fin plate (202) facing thereto.

4. The liquid cooling unit (1) according to claim 1, characterized in that The number of the first ribs (116) is two pairs; and / or, the fins (204), the at least one pair of first ribs (116) and the second ribs (118) are each perpendicular to the concave channel (120).

5. The liquid cooling unit (1) according to claim 1, characterized in that The liquid cooling unit (1) further comprises a fixed connecting portion (300) to fixedly hold the cover plate (100) and the carrier portion with the fin plate (202) covering the component to be cooled.

6. The liquid cooling unit (1) according to claim 5, characterized in that The fixed connecting portion (300) is a separate clamping member, which comprises: a clamping plate (302) in a plate shape and clamping at least a portion of the cover plate (100) in cooperation with the carrier portion when assembled; and a fixing member (304) fixedly holding the clamping plate (302) to the carrier portion.

7. The liquid cooling unit (1) according to claim 6, characterized in that The fixing member (304) is a screw passing through a through hole provided in the clamping plate (302); and / or, an elastic member (306) is provided between the head of the screw and the clamping plate (302); and / or, the clamping plate (302) further comprises a limiting portion configured to match a cooperating portion (108) in the cover plate (100) to prevent the cover plate (100) from being displaced relative to each other with respect to the clamping plate (302); and / or, the cooperating portion (108) is at least one opening provided in the at least a portion of the cover plate (100) and the limiting portion is a protrusion facing the cover plate (100) such that the protrusion can be accommodated in the at least one opening; and / or, the cover plate (100) is a copper cover plate.

8. The liquid cooling unit (1) according to claim 5, characterized in that The fixed connecting part (300) is a screw passing through a through hole arranged in the cover plate (100); and / or, the cover plate (100) is a steel cover plate; and / or, the screws are uniformly distributed around the cover plate (100); and / or, an elastic member (306) is arranged between the head of the screw and the cover plate (100).

9. The liquid cooling unit (1) according to claim 1, characterized in that, The surface of the fin plate (202) opposite to the component to be cooled is flush with the peripheral portion (112) when fixedly assembled to the cover plate (100); and / or, the heat dissipation fin (200) is fixedly assembled to the cover plate (100) by brazing; and / or, the heat dissipation fin (200) is fixedly assembled to the cover plate (100) by brazing through the at least one pair of first rib portions (116).

10. The liquid cooling unit (1) according to claim 1, characterized in that, The ends of the fins (204) and the second rib portions (118) and the ends of the at least one first rib portion (116) away from the concave channel (120) are flush with one side of the peripheral portion (112); and / or, the thickness of the body of the cover plate (100) is selected to be 2-5 mm; and / or, the component to be cooled is a chip component.

Images