Liquid distribution device and temperature control tester

Abstract

The utility model relates to a liquid distribution device and a temperature control testing machine. The liquid distribution device comprises a liquid inlet pipeline, a liquid distributor and a plurality of liquid distribution pipelines, the liquid inlet pipeline is connected with the liquid distribution pipelines through the liquid distributor, the liquid distribution device further comprises an adjusting assembly and a liquid distributor support, and the adjusting assembly is connected to the liquid inlet pipeline to drive the liquid inlet pipeline to move. The liquid separator is fixedly connected to the liquid separator support so as to keep still when the liquid inlet pipeline moves. The adjusting assembly drives the liquid inlet pipeline to move so as to change the angle between the liquid inlet pipeline and the liquid distributor, and therefore the flow of liquid distributed into the liquid distributing pipelines through the liquid distributor by the liquid inlet pipeline can be adjusted. The liquid distribution device can achieve liquid distribution, and is convenient to operate, stable and reliable in operation and long in service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of semiconductor testing, in particular to a liquid distribution device and a temperature-controlled testing machine. BACKGROUND

[0002] A temperature-controlled testing machine is a device capable of generating different temperature testing environments to test and sort chips under different temperature testing environments. The temperature-controlled testing machine usually includes multiple temperature-controlled testing units, and controls the temperature rise and temperature drop of each temperature-controlled testing unit through the joint action of a refrigerant machine and heating components, thereby ensuring the test temperature of the chip. When the refrigerant machine is used to cool multiple temperature-controlled testing units, the refrigerant is usually delivered to a distributor through an inlet pipe, and the refrigerant is distributed to multiple temperature-controlled testing units by the distributor.

[0003] Sometimes, in order to regulate the temperature of different temperature-controlled testing units, the amount of refrigerant distributed to different temperature-controlled testing units needs to be changed. In the prior art, an electromagnetic valve is usually arranged on the pipe connecting each temperature-controlled testing unit to the distributor, and the amount of refrigerant delivered to different temperature-controlled testing units is changed by the opening and closing or opening degree change of the electromagnetic valve, so as to achieve the purpose of separately controlling or adjusting the temperature of different temperature-controlled testing units. However, the arrangement of the electromagnetic valve increases the connection nodes, thereby increasing the risk of refrigerant leakage, and further requires the arrangement of a matching sealing structure and an electric control component, thereby increasing the cost of the device. In addition, after long-term use of the device, impurities in the refrigerant will affect the performance of the electromagnetic valve, causing the control accuracy of the electromagnetic valve to decrease, and resulting in uneven distribution and inconsistent cooling rates of different modules.

[0004] Therefore, it is necessary to provide a new technical scheme to overcome the deficiencies in the prior art. CONTENT OF THE INVENTION

[0005] Based on this, the present application provides a liquid distribution device and a temperature-controlled testing machine to overcome the problems in the prior art.

[0006] To this end, the present application adopts the following technical scheme: a liquid distribution device, comprising an inlet pipe, a distributor and multiple distribution pipes, the inlet pipe being connected to the multiple distribution pipes through the distributor, the liquid distribution device further comprising an adjusting assembly and a distributor support, the adjusting assembly being connected to the inlet pipe to drive the inlet pipe to move, the distributor being fixedly connected to the distributor support to remain stationary when the inlet pipe moves; wherein the adjusting assembly drives the inlet pipe to move to change the angle between the inlet pipe and the distributor, so as to adjust the liquid flow rate of the inlet pipe distributed to the multiple distribution pipes through the distributor.

[0007] In some embodiments, the distributor comprises a plurality of distribution ports connected to a plurality of distribution pipelines, and a center axis of any two of the plurality of distribution ports defines a movable plane, and the adjusting assembly drives the liquid inlet pipeline to move in the movable plane.

[0008] In some embodiments, the adjusting assembly comprises an adjusting bolt, an adjusting block and a fixing block, the liquid inlet pipeline is fixedly connected to the adjusting block, one end of the adjusting bolt is connected to the adjusting block, and the other end of the adjusting bolt is connected to the fixing block, the fixing block allows the adjusting bolt to rotate around a center axis of the adjusting bolt and prevents the adjusting bolt from moving axially along the center axis of the adjusting bolt.

[0009] In some embodiments, the distributor is fixed to the distributor support by a metal clamp, and / or the liquid inlet pipeline is fixed to the adjusting block by a metal clamp.

[0010] In some embodiments, the liquid inlet pipeline, the distributor and the plurality of distribution pipelines are configured as a plurality of groups arranged side by side, and the adjusting bolt corresponds to a plurality of adjusting bolts, and the plurality of adjusting bolts are located on the same side of the plurality of liquid inlet pipelines.

[0011] In some embodiments, the adjusting block corresponds to a plurality of adjusting blocks, and from a direction opposite to the side where the adjusting bolt is located, the lengths of the plurality of adjusting blocks connected to the plurality of liquid inlet pipelines increase in sequence.

[0012] Alternatively, from a direction opposite to the side where the adjusting bolt is located, the lengths of the plurality of adjusting bolts corresponding to the plurality of liquid inlet pipelines increase in sequence.

[0013] In some embodiments, the adjusting assembly comprises a fixing support, and at least one of the plurality of adjusting blocks is supported on the fixing support.

[0014] In some embodiments, the fixing block is arranged on the fixing support, and the fixing block is provided with a plurality of mounting positions for corresponding mounting of the plurality of adjusting bolts.

[0015] In some embodiments, the adjusting bolt comprises a threaded main body, a nut and a limiting ring, and the adjusting bolt is clamped to the fixing block by the nut and the limiting ring to limit axial movement of the adjusting bolt.

[0016] The application also adopts the following technical solution: a temperature control testing machine, comprising a refrigeration system and a plurality of temperature control units, the refrigeration system is used to refrigerate the plurality of temperature control units, the temperature control testing machine further comprises a liquid distribution device as described in any one of the above embodiments, and the refrigeration system distributes the refrigerant flow to the plurality of temperature control units through the liquid distribution device.

[0017] The liquid distribution device provided by the application comprises a liquid inlet pipeline, a distributor, a plurality of liquid distribution pipelines and an adjusting assembly. The distributor is fixed, the liquid inlet pipeline is moved by the adjusting assembly to change the angle between the liquid inlet pipeline and the distributor, so as to adjust the liquid flow rate distributed by the liquid inlet pipeline to the plurality of liquid distribution pipelines through the distributor. In this way, the use of the electromagnetic valve is omitted, a new connection node does not need to be added to the pipeline of the liquid flow, and the risk of liquid leakage is not increased. The liquid distribution device has the advantages of easy implementation, convenient operation, stable and reliable operation and long service life. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0019] Figure 1 It is a perspective assembly view of an embodiment of the liquid distribution device of the application.

[0020] Figure 2 It is a perspective assembly view of another view of an embodiment of the liquid distribution device of the application.

[0021] Figure 3 It is a perspective assembly view of another view of an embodiment of the liquid distribution device of the application.

[0022] Figure 4 It is an exploded view of an embodiment of the liquid distribution device of the application.

[0023] The element reference numbers are as follows: 100, liquid distribution device; 1, liquid inlet pipeline; 2, distributor; 3, liquid distribution pipeline; 4, adjusting assembly; 41, fixed support; 42, fixed block; 421, mounting position; 43, adjusting bolt; 431, threaded main rod; 432, nut; 433, limiting ring; 44, adjusting block; 441, short adjusting block; 442, long adjusting block; 4421, transverse part; 4422, hoop connecting part; 4423, bolt connecting part; 5, metal hoop; 6, distributor support; 61, support base plate; 62, connecting plate. DETAILED DESCRIPTION

[0024] To make the above objectives, features and advantages of the present application more clear, the specific embodiments of the present application will be described in detail below with reference to the drawings. Numerous specific details will be set forth in the following description in order to provide a thorough understanding of the present application. However, it will be appreciated by those skilled in the art that the present application can be practiced in a variety of ways beyond the specific details set forth in the description below, which are presented for purposes of example and explanation and not limitation of the present application.

[0025] It is to be noted that when an element or layer is referred to as being "on" or "connected to" another element or layer, it can be directly on or connected to the other element or layer, or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements or layers present. The use of the terms "on" and "connected to" in the present description are to be construed in the broadest sense and can include over, under, or adjacent.

[0026] In addition, the terms "first", "second", etc. are used herein only to describe various elements, but do not imply or suggest relative importance or a quantity of the indicated elements. Thus, the features defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0027] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of a first feature to a second feature can be that the first feature is directly in contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "above", "over" and "on" of a first feature to a second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature. The "below", "under" and "under" of a first feature to a second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the first feature is horizontally lower than the second feature.

[0028] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0029] Reference will now be made to Figures 1 to 4As shown, the application provides a liquid distribution device 100 and a temperature control test machine with the same. The liquid distribution device 100 is used for distributing liquid, and in an embodiment, the liquid distribution device 100 is part of a refrigeration system, which is used to realize distribution of refrigerant to different temperature control units to realize temperature adjustment of the different temperature control units.

[0030] In an embodiment, the liquid distribution device 100 includes a liquid inlet pipeline 1, a distributor 2, and a plurality of distribution pipelines 3, the liquid inlet pipeline 1 is connected to the plurality of distribution pipelines 3 through the distributor 2. The liquid distribution device 100 further includes an adjusting assembly 4 connected to the liquid inlet pipeline 1 to drive the liquid inlet pipeline 1 to move, and a distributor support 6 to which the distributor 2 is fixedly connected to remain stationary when the liquid inlet pipeline 1 moves. The adjusting assembly 4 drives the liquid inlet pipeline 1 to move to change the angle between the liquid inlet pipeline 1 and the distributor 2 to adjust the liquid flow rate of the liquid inlet pipeline 1 distributed to the plurality of distribution pipelines 3 through the distributor 2.

[0031] The liquid distribution device provided by the application includes a liquid inlet pipeline 1, a distributor 2, a plurality of distribution pipelines 3, and an adjusting assembly 4. The adjusting assembly 4 is used to control the liquid inlet pipeline 1 to move to change the angle between the liquid inlet pipeline 1 and the distributor 2, thereby adjusting the liquid flow rate of the liquid inlet pipeline 1 distributed to the plurality of distribution pipelines 3 through the distributor 2. In this way, the use of the electromagnetic valve is eliminated, and no additional connection nodes need to be added to the liquid flow pipeline, which will not increase the risk of liquid leakage. The liquid distribution device has the advantages of easy implementation, convenient operation, stable and reliable operation, and long service life.

[0032] Please refer to Figure 1 and Figure 2As shown, the liquid delivered in the liquid inlet pipeline 1 is distributed to several branch flows through the distributor 2 and then flows to several liquid distribution pipelines 3. The distributor 2 includes a liquid inlet connected with the liquid inlet pipeline 1 and several liquid outlets connected with the several liquid distribution pipelines 3. The central axes of any two liquid outlets of the several liquid outlets define an activity plane, and the adjusting assembly 4 drives the liquid inlet pipeline 1 to move in the activity plane. By driving the liquid inlet pipeline 1 to move in the activity plane formed by the central axes of the two liquid outlets through the adjusting assembly 4, the matching state of the liquid inlet pipeline 1 with the two liquid outlets changes, so that the flow resistance of the liquid flowing in the liquid inlet pipeline 1 to the two liquid outlets changes, resulting in the change of the flow to the two liquid outlets, thereby realizing the adjustment of the distribution flow. Of course, the movement of the liquid inlet pipeline 1 driven by the adjusting assembly 4 is not limited to the above-mentioned activity plane, and in other embodiments, the liquid inlet pipeline 1 can also move in other arbitrary directions. As a principle, the movement can change the liquid flow state and realize the liquid flow distribution. In the embodiment, one distributor 2 includes two liquid outlets, and the two liquid outlets are connected with two liquid distribution pipelines 3. In other embodiments, the number of liquid outlets included in one distributor 2 is not limited to two, and it can be more than two.

[0033] Please refer to Figure 1 , Figure 2 and Figure 4 As shown, in the embodiment, the distributor 2 is fixed to the distributor support 6 through the metal clamp 5. The metal clamp 5 includes a semicircular clamp portion and two connecting ears extending from both ends of the semicircular clamp portion. The semicircular clamp portion is matched and fitted with the distributor 2, and the two connecting ears are used for the screws to pass through and be locked on the distributor support 6. In the embodiment, the distributor support 6 is formed by punching and bending a metal sheet, and the distributor support 6 includes a support base plate 61 and an L-shaped connecting plate 62 extending from the support base plate 61. The metal clamp 5 used for fixing the distributor 2 is fixed on the connecting plate 62 through the screws. The support base plate 61 is provided with screw holes for fixing the distributor support 6 as a whole on other components, such as the rack of the temperature control testing machine, etc. In other embodiments, the distributor 2 is not limited to be fixed by using the metal clamp 5, and it can also be fixed by using clamping, bonding, welding, etc. In other embodiments, the structure of the distributor support 6 is also not limited to the above-mentioned structure, and it can be used as a carrier for fixing the distributor 2. For example, in some embodiments, the distributor support 6 can be part of the rack of the temperature control testing machine.

[0034] Please continue to refer to Figures 1 to 4As shown, in the present embodiment, the adjusting assembly 4 comprises a fixing bracket 41, an adjusting bolt 43, an adjusting block 44 and a fixing block 42. The liquid inlet pipeline 1 is fixedly connected to the adjusting block 44. In the present embodiment, the liquid inlet pipeline 1 is fixed to the adjusting block 44 by a metal clamp 5. The configuration of the metal clamp 5 for connecting the liquid inlet pipeline 1 to the adjusting block 44 is the same as or similar to that of the metal clamp 5 for fixing the distributor 2, which will not be described herein again. Similarly, the liquid inlet pipeline 1 is not limited to be connected to the adjusting block 44 by the metal clamp 5, but can also be connected to the adjusting block 44 by clamping, bonding, welding or the like.

[0035] In the present embodiment, the fixing bracket 41 is formed by punching and bending a metal sheet, and the present application does not limit the material and configuration of the fixing bracket 41, which can only be a carrier for mounting the fixing block 42 and other related components. In some embodiments, the fixing bracket 41 can be a part of the rack of a temperature control testing machine. The fixing block 42 is arranged on the fixing bracket 41, and the fixing block 42 is provided with a mounting position 421 for corresponding mounting of the adjusting bolt 43. One end of the adjusting bolt 43 is connected to the adjusting block 44, and the other end is connected to the fixing block 42. The fixing block 42 allows the adjusting bolt 43 to rotate about the central axis of the fixing block 42 and prevents the adjusting bolt 43 from moving axially along the central axis of the fixing block 42. In the present embodiment, the mounting position 421 is a mounting groove formed downward from the top surface of the fixing block 42, and the width of the mounting groove is substantially the same as the diameter of the adjusting bolt 43, so that the adjusting bolt 43 can be accommodated in the mounting groove. When the adjusting bolt 43 is placed in the mounting position 421 of the fixing block 42, the rotation of the adjusting bolt 43 about its own axis is not limited; that is, the adjusting bolt 43 can freely rotate about its own axis in the mounting position 421.

[0036] Please refer to Figure 3As shown, the adjusting bolt 43 comprises a threaded main body rod 431, a nut 432 and a limiting ring 433, the adjusting bolt 43 is clamped with the fixing block 42 through the nut 432 and the limiting ring 433 to limit the axial movement of the adjusting bolt 43. The nut 432 and the limiting ring 433 of the adjusting bolt 43 are arranged with a spacing, the part of the adjusting bolt 43 between the nut 432 and the limiting ring 433 is accommodated in the mounting position 421 of the fixing block 42, and the nut 432 and the limiting ring 433 are respectively located on both sides of the fixing block 42 to limit the movement of the adjusting bolt 43 along the axial direction. The end of the threaded main body rod 431 of the adjusting bolt 43 is threadedly connected to the adjusting block 44. Specifically, the adjusting block 44 is provided with a threaded hole with an internal thread, and the threaded main body rod 431 has an external thread. In this embodiment, the threaded hole is a through hole penetrating through the adjusting block 44. The cooperation of the external thread and the internal thread can connect the adjusting bolt 43 and the adjusting block 44, and can change the connection depth of the adjusting bolt 43 and the adjusting block 44. Since the adjusting bolt 43 cannot move in the axial direction, when the connection depth of the adjusting bolt 43 and the adjusting block 44 increases, the adjusting block 44 will be pulled to move towards the direction of the adjusting bolt 43, and when the connection depth of the adjusting bolt 43 and the adjusting block 44 decreases, the adjusting block 44 will be pushed to move away from the direction of the adjusting bolt 43. Since the adjusting block 44 is fixed with the liquid inlet pipeline 1, the movement of the adjusting block 44 will drive the liquid inlet pipeline 1 to move.

[0037] As shown, Figures 1 to 4 In this embodiment, the liquid inlet pipeline 1, the distributor 2 and the liquid distribution pipeline 3 are arranged in several groups in parallel, and the adjusting bolt 43 and the adjusting block 44 correspond to the several liquid inlet pipelines 1 respectively. The several adjusting bolts 43 are located on the same side of the several liquid inlet pipelines 1, and the fixing block 42 is provided with a plurality of mounting positions 421 corresponding to the adjusting bolts 43. By arranging the several adjusting bolts 43 on the same side of the several liquid inlet pipelines 1, it is convenient to operate the adjusting bolt 43, and only one fixing block 42 is needed to support the several adjusting bolts 43 at the same time. The adjusting bolt 43 can be manually operated or electrically operated, and power can be provided to drive the adjusting bolt 43 to rotate forward and reverse.

[0038] The several adjusting bolts 43 are located on the same side of the several liquid inlet pipelines 1 arranged in parallel, and the distance from each liquid inlet pipeline 1 to the side where the adjusting bolt 43 is located is different. For this purpose, different lengths of adjusting blocks 44 or different lengths of adjusting bolts 43 are arranged corresponding to each liquid inlet pipeline 1. In some embodiments, the lengths of the several adjusting blocks 44 connected to the several liquid inlet pipelines 1 from the side where the adjusting bolt 43 is located to the opposite side are increased in turn. For example, as shown, Figure 4As shown, in the embodiment, the liquid inlet pipeline 1 is two, the liquid inlet pipeline 1 close to the adjusting bolt 43 is connected with the short adjusting block 441, and the liquid inlet pipeline 1 away from the adjusting bolt 43 is connected with the long adjusting block 442. Wherein, the short adjusting block 441 is cuboid; the long adjusting block 442 is provided with a weight-reducing groove in the middle to reduce the weight, and is roughly n-shaped. Namely, the long adjusting block 442 includes a transversely extending transverse part 4421, and a hoop connecting part 4422 and a bolt connecting part 4423 arranged at opposite ends of the transverse part 4421, the hoop connecting part 4422 is connected and fixed with the liquid inlet pipeline 1 through the metal hoop 5, and the bolt connecting part 4423 is threadedly connected with the corresponding adjusting bolt 43. In other embodiments, the structures of the several adjusting blocks 44 can be the same, and the lengths of the adjusting bolts 43 are different; specifically, from the side where the adjusting bolt 43 is located to the side opposite to it, the lengths of the several adjusting bolts 43 corresponding to the several liquid inlet pipelines 1 increase in turn. Further, at least one of the several adjusting blocks 44 is supported on the fixed support 41, so that the adjusting block 44 can be supported, and the adjusting block 44 is prevented from moving downward due to gravity or causing poor movement in the adjusting process. In the embodiment, the long adjusting block 442 is long and relatively heavy, and the long adjusting block 442 is supported on the fixed support 41.

[0039] When the liquid distribution device 100 provided by the application is used to distribute liquid, the adjusting bolt 43 is rotated by applying force to the adjusting bolt 43, the adjusting block 44 connected with the adjusting bolt 43 is moved, and the liquid inlet pipeline 1 is moved, so as to change the spatial angle of the liquid inlet pipeline 1, and the matching state between the liquid inlet pipeline 1 and the distributor 2 is changed, that is, the liquid flow of the liquid inlet pipeline 1 distributed to the plurality of distribution pipelines 3 through the distributor 2 can be adjusted.

[0040] The application also provides a temperature control test machine, which includes a refrigeration system and a plurality of temperature control units, the refrigeration system is used to refrigerate the plurality of temperature control units, and the temperature control test machine also includes the liquid distribution device 100 of any one of the above embodiments, and the refrigeration system distributes the refrigerant flow to the plurality of temperature control units through the liquid distribution device 100. Wherein, the temperature control unit includes one or more components capable of heat exchange with the measured chip, for example, in an embodiment, the temperature control unit includes a test head, a test seat, a pre-warming mechanism, etc. Wherein, the refrigeration system can be set according to the existing refrigeration system, for example, the common refrigeration system composed of a compressor, an evaporator, a condenser, an expansion valve, etc.; the specific composition of the refrigeration system is not limited by the application.

[0041] From the above description of the specific embodiments, it can be seen that the liquid distribution device 100 provided by the application includes a liquid inlet pipeline 1, a distributor 2, a plurality of distribution pipelines 3 and an adjusting assembly 4. By fixing the distributor 2, the liquid inlet pipeline 1 is controlled to move by the adjusting assembly 4 to change the angle between the liquid inlet pipeline 1 and the distributor 2, so as to adjust the liquid flow rate distributed by the liquid inlet pipeline 1 to the plurality of distribution pipelines 3 through the distributor 2. In this way, the use of the electromagnetic valve is omitted, and no new connection node needs to be added on the pipeline of the liquid flow, so that the risk of liquid leakage is not increased, and the liquid distribution device has the advantages of easy implementation, convenient operation, stable and reliable operation, long service life and the like.

[0042] The technical features of the above embodiments can be combined in any manner. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present application.

[0043] The above embodiments only express several implementation manners of the application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the application, and these all belong to the protection scope of the application. Therefore, the patent protection scope of the application should be subject to the appended claims.

Claims

1. A liquid dispensing apparatus comprising a liquid inlet line (1), a distributor (2) and a plurality of liquid outlet lines (3), the liquid inlet line (1) being connected to the plurality of liquid outlet lines (3) via the distributor (2), characterised in that, The liquid distribution device further comprises an adjusting assembly (4) connected to the liquid inlet pipeline (1) to drive the liquid inlet pipeline (1) to move, and a distributor support (6) to which the distributor (2) is fixedly connected to remain stationary when the liquid inlet pipeline (1) moves; wherein the adjusting assembly (4) drives the liquid inlet pipeline (1) to move to change the angle between the liquid inlet pipeline (1) and the distributor (2) to adjust the liquid flow rate distributed by the liquid inlet pipeline (1) to the plurality of liquid distribution pipelines (3) through the distributor (2).

2. The liquid dispensing device of claim 1, wherein, The distributor (2) comprises a plurality of distribution ports connected to a plurality of liquid distribution pipelines (3), and the central axes of any two of the plurality of distribution ports define an active plane, and the adjusting assembly (4) drives the liquid inlet pipeline (1) to move in the active plane.

3. The liquid dispensing apparatus of claim 1, wherein, The adjusting assembly (4) comprises an adjusting screw (43), an adjusting block (44), and a fixing block (42), the liquid inlet pipeline (1) is fixedly connected to the adjusting block (44), one end of the adjusting screw (43) is connected to the adjusting block (44), and the other end is connected to the fixing block (42), the fixing block (42) allows the adjusting screw (43) to rotate around its central axis and prevents the adjusting screw (43) from moving axially along its central axis.

4. The liquid dispensing apparatus of claim 3, wherein, The distributor (2) is fixed to the distributor support (6) by a metal clamp (5); and / or, the liquid inlet pipeline (1) is fixed to the adjusting block (44) by a metal clamp (5).

5. The liquid dispensing apparatus of claim 3, wherein, The liquid inlet pipeline (1), the distributor (2), and the plurality of liquid distribution pipelines (3) are arranged in a plurality of groups arranged side by side, and the adjusting screw (43) corresponds to a plurality of adjusting screws (43) located on the same side of the plurality of liquid inlet pipelines (1).

6. The liquid dispensing apparatus of claim 5, wherein, The adjusting block (44) corresponds to a plurality of adjusting blocks (44), and the lengths of the plurality of adjusting blocks (44) connected to the plurality of liquid inlet pipelines (1) increase in sequence from the side opposite to the side where the adjusting screw (43) is located. Alternatively, the lengths of the plurality of adjusting screws (43) corresponding to the plurality of liquid inlet pipelines (1) increase in sequence from the side opposite to the side where the adjusting screw (43) is located.

7. The liquid dispensing device of claim 6, wherein, The adjusting assembly (4) comprises a fixing support (41), and at least one of the plurality of adjusting blocks (44) is supported on the fixing support (41).

8. The liquid dispensing apparatus of claim 7, wherein, The fixing block (42) is arranged on the fixing support (41), and the fixing block (42) is provided with a plurality of mounting positions (421) for corresponding mounting of the plurality of adjusting screws (43).

9. The liquid dispensing apparatus of claim 8, wherein, The adjusting screw (43) comprises a threaded main body rod (431), a nut (432), and a limiting ring (433), and the adjusting screw (43) is clamped with the fixing block (42) through the nut (432) and the limiting ring (433) to limit the axial movement of the adjusting screw (43).

10. A temperature-controlled testing machine comprising a refrigeration system for refrigerating a plurality of temperature-controlled units, characterized in that, The temperature-controlled testing machine further comprises the liquid distribution device as claimed in any one of claims 1 to 9, and the refrigeration system distributes the refrigerant flow to the plurality of temperature-controlled units through the liquid distribution device.

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