Refrigerant direct cooling evaporator

Abstract

The utility model discloses a refrigerant direct cooling evaporator, which relates to the technical field of heat dissipation devices, and is provided with a refrigerant inlet, a refrigerant outlet and a refrigerant flow channel communicated with the refrigerant inlet and the refrigerant outlet, the refrigerant flow channel comprises a plurality of main flow channels and a plurality of connecting flow channels, the main flow channels are arranged side by side, and the connecting flow channels are communicated with the refrigerant inlet and the refrigerant outlet. Any two adjacent main flow channels are communicated through one connecting flow channel, so that the multiple main flow channels and the multiple connecting flow channels are connected in series to form a refrigerant flow channel; wherein a microstructure is arranged in the main flow channel and comprises a plurality of protrusions arranged on the inner wall of the main flow channel in a protruding mode, the evaporator is provided with a contact face and an evaporation face which are arranged oppositely, the contact face is used for making contact with a heat source, and the evaporation face is formed by part of the inner wall surface of the main flow channel and part of the outer surface of the microstructure. According to the technical scheme, the heat dissipation efficiency of the evaporator is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a heat dissipation device technical field, especially in a kind of refrigerant direct-cooling evaporator. BACKGROUND

[0002] The heat dissipation device of existing high-power heat source generally includes secondary heat exchange system of water circulation and refrigerant circulation, 10-25 ℃ cold water is generated by water chiller unit, cold water is driven in water-cooled plate arranged in system by circulating pump, heat source is fixed on the outer wall of water-cooled plate by heat-conducting adhesive, cold water becomes hot water after a certain temperature rise by flowing through water-cooled plate and absorbing heat, hot water takes away heat, enters the evaporator of water chiller unit and exchanges heat with refrigerant, so that refrigerant evaporates while hot water becomes cold water (10-25 ℃) by a certain temperature drop, and cold water enters water-cooled plate again to carry out water circulation. Refrigerant in evaporator absorbs heat and evaporates, enters condenser to condense and release heat, and then heat is discharged into the environment by fan, and condensed refrigerant liquid enters evaporator through expansion valve to carry out refrigerant circulation. After water circulation and refrigerant circulation, heat in heat source is transferred from component to external environment.

[0003] The existing heat dissipation system needs to carry out twice convection heat exchange, i.e. cold water and the inner surface of water-cooled plate or water-cooled cavity, and hot water and the outer surface of evaporator, which leads to the reduction of heat dissipation efficiency. For heat source with large heat flow and high local heat flux, such as pump source with power ≥500 W and single laser chip optical power ≥30 W in laser, the existing heat dissipation system is difficult to meet the heat dissipation requirement. CONTENT OF UTILITY MODEL

[0004] The main purpose of the utility model is to provide a refrigerant direct-cooling evaporator, which aims to improve the heat dissipation efficiency of evaporator.

[0005] To achieve the above purpose, the refrigerant direct-cooling evaporator provided by the utility model is provided with a refrigerant inlet, a refrigerant outlet and a refrigerant flow channel connecting the refrigerant inlet and the refrigerant outlet, the refrigerant flow channel includes a main flow channel and a connecting flow channel, a plurality of main flow channels are arranged side by side, any two adjacent main flow channels are connected by a connecting flow channel, so that a plurality of main flow channels and a plurality of connecting flow channels are connected in series to form the refrigerant flow channel.

[0006] Among them, the inside of the main flow channel is provided with a microstructure, the microstructure includes a plurality of protrusions protruding from the inner wall of the main flow channel, the evaporator has a contact surface and an evaporation surface arranged oppositely, the contact surface is used for contacting heat source, and part of the inner wall surface of the main flow channel and part of the outer surface of the microstructure form the evaporation surface.

[0007] In an embodiment, a plurality of protrusions are arranged at equal intervals along the axial direction of the main flow channel; and / or,

[0008] The plurality of protrusions are arranged equidistantly along the circumference of the main flow channel.

[0009] In an embodiment, each of the protrusions extends along the axial direction of the main flow channel from one end of the main flow channel to the other end of the main flow channel.

[0010] In an embodiment, the evaporator is provided with a liquid level control structure arranged inside the refrigerant flow channel for controlling the liquid level of the refrigerant in the refrigerant flow channel.

[0011] In an embodiment, the refrigerant inlet and the refrigerant outlet are both arranged on the evaporation surface, the liquid level control structure comprises a liquid level baffle arranged between the refrigerant outlet and the refrigerant inlet and adjacent to the refrigerant outlet, and an opening is arranged at the end of the liquid level baffle away from the evaporation surface.

[0012] In an embodiment, the evaporator comprises:

[0013] a main body, the refrigerant inlet, the refrigerant outlet and the plurality of main flow channels are all arranged on the main body, each of the main flow channels penetrates through the main body, and the main body is further provided with a communication groove, and the end portions of two adjacent main flow channels are communicated through one communication groove;

[0014] a first end cover, which blocks the groove opening of the communication groove so that the inner wall of the communication groove and the first end cover jointly form the connection flow channel; and

[0015] a second end cover, which blocks the end portion of the main flow channel away from the communication groove.

[0016] In an embodiment, the evaporator further comprises a pipe joint and a sealing member, the refrigerant inlet and the refrigerant outlet are respectively provided with one pipe joint, and the sealing member sealingly connects the pipe joint and the main body; and / or,

[0017] a limiting structure is arranged in the communication groove, and the limiting structure abuts against the first end cover to block the first end cover from closing the main flow channel.

[0018] In an embodiment, the cross section of the main flow channel is circular or elliptical.

[0019] In an embodiment, the inner diameter of the main flow channel is less than or equal to 50 mm; and / or,

[0020] The distance between two adjacent main flow channels is greater than or equal to 2 mm.

[0021] In an embodiment, the evaporator further comprises a refrigerant pipe connected to the refrigerant inlet, and the height of the main flow channel is greater than or equal to 2 times the inner diameter of the refrigerant pipe.

[0022] The technical scheme of the utility model discloses a refrigerant direct cooling evaporator is equipped with refrigerant inlet, refrigerant outlet and the refrigerant flow channel that links refrigerant inlet and refrigerant outlet, and refrigerant liquid enters the inside of refrigerant flow channel from refrigerant inlet, and the process of flowing in the refrigerant flow channel will evaporate and absorb heat, and become gas-liquid mixture, then leave from refrigerant outlet, thereby realizing the heat dissipation function of evaporator, and the evaporator directly contacts heat source through contact surface, and directly dissipates heat through refrigerant evaporation, greatly improve the heat dissipation coefficient of evaporator, and do not need to utilize water cooling to carry out secondary heat exchange, thereby improving the heat dissipation efficiency of evaporator, and simplifying the complexity of heat dissipation system. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to the structure shown in these drawings.

[0024] Figure 1 The utility model provides a refrigerant direct cooling evaporator one embodiment's section for the utility model provides the refrigerant direct cooling evaporator one embodiment's microstructure's schematic view Figure 1 ;

[0025] Figure 2 The utility model provides a refrigerant direct cooling evaporator one embodiment's section for the utility model provides the refrigerant direct cooling evaporator one embodiment's microstructure's schematic view

[0026] Figure 3 The microstructure schematic view of another embodiment of the refrigerant direct-cooling evaporator provided by the utility model is shown in the figure;

[0027] Figure 4 The structure schematic view of an embodiment of the refrigerant direct-cooling evaporator provided by the utility model is shown in the figure;

[0028] Figure 5 The sectional view of an embodiment of the refrigerant direct-cooling evaporator provided by the utility model is shown in the figure; Figure 2

[0029] Figure 6 The exploded view of an embodiment of the refrigerant direct-cooling evaporator provided by the utility model is shown in the figure.

[0030] Explanation of reference numerals:

[0031] 100, main body; 110, refrigerant flow channel; 111, main flow channel; 112, connecting flow channel; 1121, communication groove; 120, refrigerant inlet; 130, refrigerant outlet; 140, microstructure; 141, protrusion; 150, limiting structure; 101, evaporation surface; 102, contact surface;

[0032] 200, first end cover;

[0033] 300, second end cover;

[0034] 410, liquid level baffle; 411, aperture;

[0035] 510, pipe joint; 520, sealing member.

[0036] The implementation, functional features and advantages of the utility model will be further described with reference to the accompanying drawings in combination with embodiments. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0038] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0039] ​In the utility model, unless another definite provision and limitation, the term "connect" "fix" and so on should do the broad sense understanding, for example, "fix" can be fixed connection, also can be detachable connection, or be integrated, "connect" can be mechanical connection, also can be electric connection, can be direct connection, also can through the indirect connection of intermediate medium, can be the intercommunication of two elements or the interaction of two elements. Unless another definite limitation, for the ordinary skill in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.

[0040] In addition, if the utility model embodiment involves "first" "second" and the like description, the "first" "second" and the like description is only for the description purpose, and can not be understood as indicating or suggesting its relative importance or implicitly indicating the number of the indicated technical features. Therefore, the feature with "first" "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on that the ordinary skill in the art can realize, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0041] The utility model provides a kind of refrigerant direct-cooling evaporator, evaporator as a kind of heat dissipation device, can be applied to the heat dissipation of multiple heat sources, for example, the pump source of laser, radar, air conditioner, server etc.

[0042] Please refer to Figure 1 、 Figure 2 、 Figure 4 And Figure 5 , Figure 1 for the sectional view of the refrigerant direct-cooling evaporator embodiment provided by the utility model Figure 1 , Figure 2 for the schematic diagram of microstructure of the refrigerant direct-cooling evaporator embodiment provided by the utility model, Figure 4 for the structural schematic diagram of the refrigerant direct-cooling evaporator embodiment provided by the utility model, Figure 5 for the sectional view of the refrigerant direct-cooling evaporator embodiment provided by the utility model Figure 2 .

[0043] In an embodiment of the utility model, this refrigerant direct cooling evaporator is equipped with refrigerant inlet 120, refrigerant outlet 130 and the refrigerant flow channel 110 that communicates refrigerant inlet 120 and refrigerant outlet 130, and the refrigerant flow channel 110 includes main flow channel 111 and connecting flow channel 112, multiple main flow channels 111 are provided side by side, and any two adjacent main flow channels 111 are communicated through a connecting flow channel 112, so that multiple main flow channels 111 and multiple connecting flow channels 112 are connected in series to form the refrigerant flow channel 110;

[0044] Among them, the inside of main flow channel 111 is equipped with microstructure 140, and microstructure 140 includes multiple convex 141 that are convex on the inner wall of main flow channel 111, and the evaporator has oppositely arranged contact surface 102 and evaporation surface 101, contact surface 102 is used to contact heat source, and part of the inner wall surface of main flow channel 111 and part of the outer surface of microstructure 140 form evaporation surface 101.

[0045] The technical scheme of the utility model discloses a refrigerant direct cooling evaporator which is provided with a refrigerant inlet 120, a refrigerant outlet 130 and a refrigerant flow channel 110 connecting the refrigerant inlet 120 and the refrigerant outlet 130, refrigerant liquid enters the inside of the refrigerant flow channel 110 from the refrigerant inlet 120, and the refrigerant liquid evaporates and absorbs heat in the process of flowing in the refrigerant flow channel 110, and becomes a gas-liquid mixture, and then leaves from the refrigerant outlet 130, so that the heat dissipation function of the evaporator is realized, the evaporator directly contacts the heat source through the contact surface 102, and directly dissipates heat through refrigerant evaporation, so that the heat dissipation coefficient of the evaporator is greatly improved, and secondary heat exchange through water cooling is not needed, so that the heat dissipation efficiency of the evaporator is enhanced, and the complexity of the heat dissipation system is simplified.

[0046] The cross section of the main flow channel 111 and the connecting flow channel 112 is not limited herein and can be circular, oval, square or the like.

[0047] In an embodiment, the plurality of protrusions 141 are arranged at equal intervals along the axial direction of the main flow channel 111; and / or,

[0048] The plurality of protrusions 141 are arranged at equal intervals along the circumferential direction of the main flow channel 111.

[0049] Reference Figure 2In the embodiment of the utility model, the refrigerant flows along the axial direction of the main flow channel 111, and the plurality of protrusions 141 in the microstructure 140 can be arranged at equal intervals along the axial direction of the main flow channel 111, which ensures the uniformity of the microstructure 140 along the axial direction of the main flow channel 111, and the plurality of protrusions 141 in the microstructure 140 can also be arranged at equal intervals along the circumferential direction of the main flow channel 111, which ensures the uniformity of the microstructure 140 along the circumferential direction of the main flow channel 111, thereby further avoiding the risk of local overheating and improving the stability and reliability of the evaporator. Figure 3

[0050] In an embodiment, each protrusion 141 extends along the axial direction of the main flow channel 111 from one end of the main flow channel 111 to the other end of the main flow channel 111.

[0051] Referring to Figure 1 In the embodiment of the utility model, each protrusion 141 in the microstructure 140 extends along the axial direction of the main flow channel 111 from one end of the main flow channel 111 to the other end, which ensures the uniformity of the microstructure 140 along the axial direction of the main flow channel 111, thereby further avoiding the risk of local overheating and improving the stability and reliability of the evaporator. In this embodiment, the main body 100 of the evaporator is directly extruded to form the main flow channel 111 and the protrusions 141 extending along the axial direction thereof through the aluminum alloy extrusion process, and the protrusions 141 extending along the axial direction are divided into a plurality of dot-shaped protrusions 141 through a small-scale tap threading or knurling process, thereby forming the uniformly arranged microstructure 140, which is simple in structure and easy to process.

[0052] In an embodiment, the evaporator is provided with a liquid level control structure arranged inside the refrigerant flow channel 110 for controlling the liquid level of the refrigerant in the refrigerant flow channel 110.

[0053] In the embodiment of the utility model, the liquid level control structure is arranged inside the refrigerant flow channel 110 for controlling the liquid level of the refrigerant in the flow channel. On the one hand, it can ensure that the liquid level of the refrigerant remains within a certain range during the operation of the evaporator, thereby avoiding the problem of dry burning and overheating caused by too little refrigerant liquid. On the other hand, it can also avoid the problem of insufficient space for the evaporation of refrigerant caused by too much refrigerant liquid in the refrigerant flow channel 110, thereby ensuring the evaporation efficiency of the refrigerant and the heat dissipation efficiency of the evaporator. The liquid level control structure can be realized in various ways, such as a float valve, a liquid level baffle 410, and a lead-out pipe extending upward from the refrigerant outlet 130 by a certain distance.

[0054] ​In an embodiment, the refrigerant inlet 120 and the refrigerant outlet 130 are both arranged on the evaporation surface 101, and the liquid level control structure comprises a liquid level baffle 410 arranged between the refrigerant outlet 130 and the refrigerant inlet 120 and adjacent to the refrigerant outlet 130, and an opening 411 is arranged at an end of the liquid level baffle 410 away from the evaporation surface 101.

[0055] In the embodiment of the present application, the refrigerant inlet 120 and the refrigerant outlet 130 are both arranged on the evaporation surface 101, so that the refrigerant liquid can cover the evaporation surface 101 and the dry burning overheating problem is avoided. The liquid level control structure is the liquid level baffle 410, and the opening 411 is arranged at an end of the liquid level baffle 410 away from the evaporation surface 101. The liquid level baffle 410 blocks the refrigerant liquid below the opening 411 inside the refrigerant flow channel 110, and the refrigerant liquid above the opening 411 passes through the opening 411 together with the evaporated refrigerant gas and then leaves the evaporator from the refrigerant outlet 130. Since the flow speed of the refrigerant liquid in the refrigerant flow channel 110 is very slow relative to the flow speed in the refrigerant pipe, it can be understood that, under the action of gravity, the refrigerant liquid is located at the bottom of the refrigerant flow channel 110, and the refrigerant gas is located at the top of the refrigerant flow channel 110. The unevaporated refrigerant liquid flows out of the opening 411 in the upper part of the liquid level baffle 410 together with the refrigerant gas, and a certain liquid level height is maintained in the evaporator, so that the dry burning overheating phenomenon is avoided. In the embodiment, the outer periphery of the liquid level baffle 410 is in interference fit with the inner wall of the main flow channel 111 and then is welded and fixed, so as to ensure the sealing performance of the liquid level baffle 410 and ensure that the gas-liquid mixture of the refrigerant passes through the liquid level baffle 410 only through the opening 411. The liquid level control function is realized by using the liquid level baffle 410, the structure is simple, easy to process and assemble, and no electrical components are needed, so that the manufacturing cost of the evaporator is reduced.

[0056] In an embodiment, the evaporator comprises:

[0057] a main body 100, the refrigerant inlet 120, the refrigerant outlet 130 and the plurality of main flow channels 111 are arranged on the main body 100, each main flow channel 111 penetrates through the main body 100, and the main body 100 is further provided with a communication groove 1121, and the end portions of two adjacent main flow channels 111 are communicated through one communication groove 1121;

[0058] a first end cover 200, which blocks the groove opening of the communication groove 1121 so as to jointly enclose the inner wall of the communication groove 1121 and the first end cover 200 to form the connecting flow channel 112; and

[0059] a second end cover 300, which blocks the end portion of the main flow channel 111 away from the communication groove 1121.

[0060] In combination with Figure 4 , Figure 6 and Figure 4 to Figure 5In the embodiment of the utility model, evaporimeter includes main body 100, first end cover 200 and second end cover 300, main flow channel 111 runs through main body 100, and the whole main body 100 is formed by metal extrusion process, easy to manufacture. The main body 100 is equipped with the communication groove 1121, and the end of two adjacent main flow channels 111 is communicated through a communication groove 1121, and then the slot of communication groove 1121 is blocked by first end cover 200, thereby forming the connecting flow channel 112 connecting two main flow channels 111, simple structure, easy to manufacture. Since refrigerant inlet 120 and refrigerant outlet 130 are both arranged on the evaporation surface 101, the end of the first and last two main flow channels 111 still has an opening without the communication groove 1121, and therefore the second end cover 300 is arranged to block the end of the two main flow channels 111, to ensure the sealing of the cooling flow channel and to ensure that the refrigerant can only leave the evaporimeter through the refrigerant outlet 130. The main body 100, the first end cover 200 and the second end cover 300 are all made of metal material with good thermal conductivity, such as aluminum or aluminum alloy or copper or copper alloy, and in the embodiment, the main body 100, the first end cover 200 and the second end cover 300 are all made of aluminum alloy with the brand 6063-T6, which not only ensures the pressure-bearing strength but also has high thermal conductivity, the thermal conductivity is ≥200W / (m×℃), and the aluminum alloy is light in weight and easy to process. The first end cover 200 and the second end cover 300 are fixed to the main body 100 by welding process, and then are finished after welding, and after passing the pressure resistance and air tightness test, the surface is treated by hard anodic oxidation process (the thickness of the oxidation layer is ≥20um) to improve the corrosion resistance of the evaporimeter and prolong the service life of the evaporimeter.

[0061] In an embodiment, the evaporimeter further comprises a pipe joint 510 and a sealing member 520, the refrigerant inlet 120 and the refrigerant outlet 130 are respectively provided with a pipe joint 510, and the sealing member 520 is connected to the pipe joint 510 and the main body 100 in a sealed manner.

[0062] The limiting structure 150 is arranged in the communication groove 1121, and the limiting structure 150 abuts against the first end cover 200 to block the first end cover 200 from closing the main flow channel 111.

[0063] Referring to Figure 6In the embodiment of the present application, the evaporator further comprises a pipe joint 510 and a sealing member 520, since the material of the evaporator is aluminum alloy, the refrigerant pipe for conveying refrigerant in the refrigerant system is generally copper pipe, and the welding of copper and aluminum is relatively difficult, therefore, the transitional pipe joint 510 is arranged at the refrigerant inlet 120 and the refrigerant outlet 130 of the evaporator respectively, one end of the pipe joint 510 is connected with the main body 100 and is sealed through the sealing member 520, and the other end is used for connecting the refrigerant pipe. Through the arrangement of the pipe joint 510, the installation and dismounting of the evaporator become more convenient, and the maintenance and replacement are facilitated, in addition, the failure caused by poor connection is reduced, and the reliability of the evaporator is improved. The pipe joint 510 adopts stainless steel, brass, high-strength aluminum alloy and other materials which can meet the strength and corrosion resistance requirements, when the brass and high-strength aluminum alloy materials are adopted, surface treatment is required, otherwise, electrochemical corrosion will be caused under the action of condensate water, for example, when the brass is used, nickel plating process is required for surface treatment, and when the aluminum alloy is used, hard anodic oxidation process (the thickness of the oxide layer is greater than or equal to 20 um) or nickel plating process is required for surface treatment. The sealing member 520 can be a gasket, an O-ring and the like made of elastic materials such as rubber and plastic, and in the embodiment, the sealing member 520 adopts an O-ring made of hydrogenated nitrile rubber (hardness is greater than or equal to 70).

[0064] With reference to Figure 5 In the embodiment of the present application, the limiting structure 150 is arranged in the communication groove 1121, when the first end cover 200 is placed into the communication groove 1121 and placed in position, the limiting structure 150 will abut against the first end cover 200, and the further movement of the first end cover 200 is prevented, so that the first end cover 200 will not close the main flow channel 111, the correct assembly of the evaporator is ensured, and the convenience of assembly is improved.

[0065] In an embodiment, the cross section of the main flow channel 111 is circular or elliptical.

[0066] With reference to Figure 5 In the embodiment of the present application, the cross section of the main flow channel 111 is circular or elliptical, on the one hand, the processing is easy, and the manufacturing difficulty of the evaporator is reduced; on the other hand, the pressure bearing capacity of the evaporator is strong, the strength of the evaporator is ensured, and the service life of the evaporator is prolonged.

[0067] In an embodiment, the inner diameter of the main flow channel 111 is less than or equal to 50 mm; and / or,

[0068] The distance between the two adjacent main flow channels 111 is greater than or equal to 2 mm.

[0069] In the embodiment of the present application, the evaporator is used for heat dissipation of the pump source of the laser, the inner diameter of the main flow channel 111 is D (as shown in Figure 5 The distance between the two main flow channels 111 is δ (as shown in Figure 5The size of the diameter D depends on the width W of the pump source, each pump source is arranged with two main flow channels 111 in which the flow directions of the refrigerant are opposite to each other, the center distance h of the two flow channels is D+δ, and the value of δ depends on the pressure bearing capacity of the main flow channel 111, and the pressure bearing capacity of the main flow channel 111 is σ is the tensile strength of the aluminum alloy 6063-T6, about 210 MPa, when the inner diameter of the main flow channel 111 is less than or equal to 50 mm, and the distance between the two adjacent main flow channels 111 is greater than or equal to 2 mm, the theoretical pressure bearing capacity of the main flow channel 111 is calculated to be 16.8 MPa, which meets the pressure requirement of the existing refrigerant. It can be understood that, under the premise of meeting the installation size (mainly the fixing hole position between the heat source), the smaller the distance δ between the two adjacent main flow channels 111, the higher the average evaporation heat exchange coefficient of the bottom of the evaporator, but considering the material defects and the error of the aluminum alloy extrusion forming process, δ≥2 mm is taken in the embodiment.

[0070] In an embodiment, the evaporator further comprises a refrigerant pipe connected to the refrigerant inlet 120, and the height of the main flow channel 111 is greater than or equal to 2 times the inner diameter of the refrigerant pipe.

[0071] In the embodiment of the present application, the evaporator comprises a refrigerant pipe (not shown in the figure) connected to the refrigerant inlet 120, and the height H (as shown in ​ The height H of the main flow channel 111 is greater than or equal to 2 times the inner diameter of the refrigerant pipe, so as to ensure that the refrigerant flow channel 110 has enough space to accommodate the refrigerant liquid and the evaporated refrigerant gas.

[0072] The above is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields within the technical concept of the present application is included in the patent protection scope of the present application.

Claims

1. A refrigerant direct-cool evaporator characterized by, The evaporator is provided with a refrigerant inlet, a refrigerant outlet, and a refrigerant flow channel connecting the refrigerant inlet and the refrigerant outlet, the refrigerant flow channel comprising a plurality of main flow channels arranged side by side and a plurality of connecting flow channels, any two adjacent main flow channels being connected by one connecting flow channel, so that the plurality of main flow channels and the plurality of connecting flow channels are connected in series to form the refrigerant flow channel. The main flow channel is internally provided with a microstructure, the microstructure comprising a plurality of protrusions protruding from the inner wall of the main flow channel, the evaporator having a contact surface and an evaporation surface arranged opposite to each other, the contact surface being used to contact a heat source, and part of the inner wall surface of the main flow channel and part of the outer surface of the microstructure forming the evaporation surface.

2. The refrigerant direct expansion evaporator of claim 1, wherein, The plurality of protrusions are arranged at equal intervals along the axial direction of the main flow channel; and / or The plurality of protrusions are arranged at equal intervals along the circumferential direction of the main flow channel.

3. The refrigerant direct expansion evaporator of claim 1, wherein, Each protrusion extends along the axial direction of the main flow channel from one end of the main flow channel to the other end of the main flow channel.

4. The refrigerant direct expansion evaporator of claim 1, wherein, The evaporator is provided with a liquid level control structure arranged inside the refrigerant flow channel and used to control the liquid level of the refrigerant in the refrigerant flow channel.

5. The refrigerant direct expansion evaporator of claim 4, wherein, The refrigerant inlet and the refrigerant outlet are both arranged on the evaporation surface, and the liquid level control structure comprises a liquid level baffle arranged between the refrigerant outlet and the refrigerant inlet and adjacent to the refrigerant outlet, one end of the liquid level baffle away from the evaporation surface being provided with an opening.

6. The refrigerant direct expansion evaporator of claim 1, wherein, The evaporator comprises: a main body, the refrigerant inlet, the refrigerant outlet, and the plurality of main flow channels being arranged on the main body, each main flow channel penetrating through the main body, the main body being further provided with a communication groove, and the end portions of two adjacent main flow channels being connected by one communication groove; a first end cover, the communication groove being closed by the first end cover, so that the inner wall of the communication groove and the first end cover jointly form the connecting flow channel; and a second end cover, the end portion of the main flow channel away from the communication groove being closed by the second end cover.

7. The refrigerant direct expansion evaporator of claim 6, wherein, The evaporator further comprises a pipe joint and a sealing member, the refrigerant inlet and the refrigerant outlet being respectively provided with one pipe joint, and the pipe joint and the main body being sealingly connected by the sealing member; and / or the communication groove is internally provided with a limiting structure, the limiting structure abutting against the first end cover to prevent the first end cover from closing the main flow channel.

8. The refrigerant direct expansion evaporator of claim 1, wherein, The cross section of the main flow channel is circular or elliptical.

9. The refrigerant direct expansion evaporator of claim 8, wherein, The inner diameter of the main flow channel is less than or equal to 50 mm; and / or The distance between the two adjacent main flow channels is greater than or equal to 2 mm.

10. The refrigerant direct expansion evaporator of claim 1, wherein, The evaporator further comprises a refrigerant pipe connected to the refrigerant inlet, and the height of the main flow channel is greater than or equal to 2 times the inner diameter of the refrigerant pipe.

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