Anti-frosting device, temperature control device and test equipment

Abstract

The application relates to an anti-frosting device, a temperature control device and a test equipment, which comprises an outer heat preservation shell, a heat preservation cover and an air inlet hole. The outer heat preservation shell comprises a mounting cavity, a first avoiding hole, a second avoiding hole and a first air channel, the first avoiding hole is used for penetrating a heat transfer part, the second avoiding hole is used for penetrating a connecting part, the inner wall of the first avoiding hole is configured to jointly define a gas outlet with the heat transfer part, and / or the inner wall of the second avoiding hole is configured to jointly define the gas outlet with the connecting part, the first air channel is defined by the inner wall of the mounting cavity and is used for being arranged around at least part of the outer wall surface of the pressure head body in the mounting cavity. The heat preservation cover is mounted on the outer heat preservation shell and is used for accommodating a refrigerant pipe joint and forming a second air channel, the first air channel and the second air channel are both communicated with the gas outlet. The air inlet hole is arranged on the outer heat preservation shell and / or the heat preservation cover and is communicated with the first air channel and the second air channel. The anti-frosting device of the application can effectively prevent or slow down the frosting of the test pressure head.

Description

Technical Field

[0001] This application relates to the field of semiconductor testing equipment technology, and in particular to anti-frost devices, temperature control devices, and testing equipment. Background Technology

[0002] Semiconductor testing equipment, such as sorting and testing machines, typically uses a test head as a temperature control medium to regulate the test temperature of the chip. In related technologies, the test head is circulated with a low-temperature medium (such as fluorinated liquid) to adjust its test temperature, which makes the test head prone to condensation and frosting. Summary of the Invention

[0003] Based on this, in order to improve the problem of frost formation on the test head, an anti-frost device, a temperature control device, and a test equipment are provided.

[0004] In a first aspect, this application proposes an anti-frost device for preventing or mitigating frost formation on a test head. The test head includes a head body and a refrigerant pipe connector, the refrigerant pipe connector being connected to the head body and transmitting refrigerant between the head body and the head body. The head body has a connecting portion and a heat transfer portion located at opposite ends along a first direction. The anti-frost device includes: The outer insulation shell includes a mounting cavity, a first clearance hole, a second clearance hole, and a first air passage. The mounting cavity is used to mount the pressure head body. The first clearance hole is used to pass through the heat transfer part. The second clearance hole is used to pass through the connecting part. The inner wall of the first clearance hole is configured to define an air outlet together with the heat transfer part and / or the inner wall of the second clearance hole is configured to define an air outlet together with the connecting part. The first air passage is defined by the inner wall of the mounting cavity and is used to surround at least a portion of the outer wall surface of the pressure head body located in the mounting cavity. An insulation cover is installed on the outer insulation shell to accommodate the refrigerant pipe joint and form a second air passage. Both the first air passage and the second air passage are connected to the air outlet. An air inlet is provided on the outer insulation shell and / or the insulation cover, and connects the first air passage and the second air passage.

[0005] After the above-mentioned anti-frost device is assembled with the test head, airflow is introduced through the air inlet. With the arrangement of the first air passage, the second air passage and the air outlet, the airflow can exchange heat with the parts of the test head that are prone to frost more fully and evenly, which can effectively prevent or slow down the frost formation on the test head.

[0006] In some embodiments, the anti-frost device further includes an inner insulation shell located in the mounting cavity for covering the pressure head body located in the mounting cavity, wherein the first air passage is formed by the inner wall of the mounting cavity and the inner insulation shell spaced apart.

[0007] At this time, the inner insulation shell can prevent excessive heat carried by the airflow in the first air passage from being transferred to the flow channel, reduce the loss of cold energy in the flow channel, and improve the utilization rate of refrigerant cold energy.

[0008] In some embodiments, a heat insulation groove is provided on the inner wall of the inner insulation shell, and the pressure head body located inside the inner insulation shell covers the opening of the heat insulation groove.

[0009] At this time, the heat insulation groove reduces the contact area between the inner insulation shell and the flow channel. The air insulation layer formed in the heat insulation groove can slow down the heat transfer between the inner insulation shell and the flow channel, further reducing the cold loss of the flow channel.

[0010] In some embodiments, the first air passage is defined by the inner wall of the mounting cavity and at least a portion of the outer wall of the pressure head body located in the mounting cavity.

[0011] At this time, the airflow flowing through the first air passage directly contacts the outer surface of the pressure head body located in the mounting cavity. Using a lower temperature airflow can prevent or slow down frost formation on the outside of the flow passage, reduce the energy consumption of the heated airflow, and simplify the construction of the anti-frost device.

[0012] In some embodiments, the first air passage is directly connected between the air inlet and the air outlet, and the second air passage is connected to the air inlet and the air outlet via the first air passage.

[0013] At this time, the first and second air passages share the same air inlet, which can reduce the number of air inlets, reduce the number of pipelines, and simplify the structure of the anti-frost device.

[0014] In some embodiments, the anti-frost device includes an insulation layer disposed on the outer surface of the outer insulation shell and surrounding the second clearance hole.

[0015] At this time, covering the outer surface of the top wall of the outer insulation shell with an insulation layer can reduce the heat loss of the airflow in the first air passage and improve its heat utilization rate.

[0016] In some embodiments, the air outlet includes a first air outlet defined by the inner wall of the first clearance hole, the air inlet is located at the end of the outer insulation shell opposite to the first clearance hole, and the first air passage is directly connected between the air inlet and the first air outlet.

[0017] At this time, the top of the outer insulation shell is used for air intake and the bottom is used for air exhaust. Under the action of gravity and pressure difference, a stable and uniform downward flow field can be formed in the first air channel, which improves the anti-frost effect of the flow channel.

[0018] In some embodiments, the outer insulation shell includes a cover plate and a middle shell, the middle shell being disposed around the first direction, and the cover plate covering one end of the middle shell in the first direction, both of which help to define the mounting cavity; the second clearance hole and the air inlet hole are provided on the cover plate; The first air passage includes a first sub-air passage defined by the inner wall of the cover plate and a second sub-air passage defined by the inner wall of the middle shell, which are connected to each other; the first sub-air passage is connected to the air inlet, and the second sub-air passage is connected to the first air outlet.

[0019] In this way, the first air passage achieves defrosting of the top and sides of the pressure head body located in the mounting cavity. The defrosting area is large, which can effectively prevent or slow down the frosting of the pressure head body.

[0020] In some embodiments, the inner wall of the cover plate is provided with a first protruding edge that surrounds the second clearance hole. The first protruding edge is used to abut against the outer wall of the pressure head body or to abut against the inner insulation shell covering the pressure head body. The projections of the first sub-air passage and the air inlet along the first direction are located within the enclosure of the first convex edge, and the first convex edge is provided with a first air passage connecting the first sub-air passage and the second sub-air passage.

[0021] At this time, the first convex edge can limit the pressure head body or the inner insulation shell, effectively define the first sub-air passage, ensure the unobstructed flow of the first sub-air passage, increase the residence time of the airflow in the first sub-air passage, and improve the anti-frost effect on the top of the pressure head body.

[0022] In some embodiments, the first protruding edge is configured to extend along the periphery of the abutting inner insulation shell or along the periphery of the abutting pressure head body. Along the first direction, the projection of the second air passage is located between the first convex edge and the inner wall of the middle shell.

[0023] At this point, aligning the first convex edge with the corner area enhances the limiting effect of the outer insulation shell on the edge area of ​​the inner insulation shell or the pressure head body, thereby improving the reliability of the pressure head body and the inner insulation shell's positional installation. Simultaneously, as the airflow passes through the first air passage to the second sub-air passage, it reduces the obstruction of the airflow by the periphery of the inner insulation shell or the corner area of ​​the pressure head body, improving airflow efficiency and contributing to enhanced anti-frost performance.

[0024] In some embodiments, the cover plate is provided with a first vent hole and a second vent hole, both of which are connected to the second air passage; The first vent is located within the enclosure of the first protruding edge and is connected to the first sub-air passage. The second vent is located outside the enclosure of the first protruding edge and is connected to the second sub-air passage.

[0025] At this time, the heat insulation cover is set on the cover plate, and the first vent hole and the second vent hole are machined on the cover plate so that the air inlet and outlet of the second air passage are connected to the first air passage, which greatly simplifies the internal air passage distribution and improves the utilization rate of airflow thermal efficiency.

[0026] In some embodiments, the heat insulation cover includes a receiving cavity, the second air passage includes a first air passage segment and a second air passage segment, the receiving cavity is used for passing a refrigerant pipe connector, the first air passage segment is aligned and communicates with the first vent hole, the second air passage segment is aligned and communicates with the second vent hole, and the receiving cavity connects the first air passage segment and the second air passage segment.

[0027] At this time, by forming the first air passage section and the second air passage section inside the insulation cover, the air inlet and outlet positions of the accommodating cavity can be raised in the first direction, making the airflow distribution in the accommodating cavity more uniform and improving the anti-frost effect on the refrigerant pipe joint.

[0028] In some embodiments, the inner wall of the cover plate is provided with a second protruding edge that surrounds the second clearance hole. The second protruding edge is used to abut against the outer wall of the pressure head body or to abut against the inner insulation shell covering the pressure head body, and divides the first sub-air passage into an inner air passage area and an outer air passage area. The inner air passage area is connected to the second clearance hole and is used to pass through the connecting part. The outer air passage area is connected to the air inlet. A second air passage is provided on the second convex edge, which connects the inner air passage area and the outer air passage area. The outer air passage area is connected to the second sub-air passage.

[0029] At this point, the second protruding edge enhances the strength of the cover plate and improves the installation stability of the connection. If the second clearance hole defines the second air outlet, the second protruding edge can also prevent the airflow in the first sub-air passage from flowing to the second air outlet, thereby increasing the residence time of the airflow in the first sub-air passage and improving the anti-frost effect on the top of the pressure head body.

[0030] In some embodiments, the cover plate is recessed on the inner wall of the inner air passage area and a limiting groove is provided. The second clearance hole penetrates the bottom of the limiting groove, and the limiting groove is used to limit the installation of the connecting part.

[0031] At this point, the limiting groove is used to position and install the connecting part, thereby improving the installation efficiency of the test head.

[0032] In some embodiments, the air outlet includes a second air outlet defined by the inner wall of the second clearance hole, the second air outlet communicating with the first sub-air passage.

[0033] At this point, the placement of the second air outlet allows the airflow within the first sub-air passage to flow in either direction, resulting in a more uniform airflow distribution and improved anti-frost performance on the top of the pressure head. Furthermore, this dual-outlet design reduces local back pressure in the first sub-air passage, decreasing flow resistance and airflow impact, thus helping to reduce energy consumption and extend the device's lifespan. Additionally, the second air outlet is defined by a second clearance hole; by rationally designing the diameter of the second clearance hole, no additional machining is required, simplifying the manufacturing process of the anti-frost device and reducing manufacturing costs.

[0034] In some embodiments, the outer insulation shell further includes a bottom plate, which is disposed at one end of the middle shell away from the cover plate. The first clearance hole is disposed on the bottom plate, and the first air passage includes a third sub-air passage defined by the bottom plate. The third sub-air passage connects the first clearance hole and the second sub-air passage.

[0035] At this time, the first air passage can defrost the pressure head body from three directions: top, side and bottom, which greatly improves the anti-frost effect of the pressure head body.

[0036] Secondly, this application proposes a temperature control device, comprising: Test head; and As described in the first aspect, in the anti-frost device, the pressure head body of the test pressure head is installed inside the mounting cavity.

[0037] The aforementioned temperature control device, by introducing airflow into the air inlet, and with the arrangement of the first air passage, the second air passage, and the air outlet, allows the airflow to exchange heat more fully and evenly with the parts of the test head that are prone to frost, effectively preventing or slowing down the frost formation on the test head.

[0038] In some embodiments, the connecting portion and the second clearance hole form a second air outlet, and the portion of the connecting portion outside the anti-frost device forms a flow gap with the outer insulation shell.

[0039] At this time, as the airflow exits from the second outlet, it diffuses into the environment along the flow gap. This prevents the connection from blocking the second outlet, reducing airflow resistance inside the anti-frost device and improving the airflow efficiency of the temperature control device.

[0040] In some embodiments, the test head includes a fastener, and the outer insulation shell is provided with a mounting hole, through which the fastener fixes the head body to the anti-frost device.

[0041] At this point, fasteners are used to fix the pressure head body and the anti-frost device together, resulting in a simple structure that is easy to implement.

[0042] Thirdly, this application proposes a testing device including the temperature control device as described in the second aspect. Attached Figure Description

[0043] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the external shape of the temperature control device in some embodiments; Figure 2 for Figure 1 Top view of the temperature control device shown; Figure 3 for Figure 2 Sectional view at point AA; Figure 4 for Figure 2 Sectional view at point BB; Figure 5 A cross-sectional view of an anti-frost device according to some embodiments; Figure 6 This is a partial structural schematic diagram of an anti-frost device according to some embodiments; Figure 7 This is a schematic diagram showing the fit between the cover plate and the connecting part of an anti-frost device in some examples; Figure 8 for Figure 2 Sectional view at point DD; Figure 9 for Figure 2 Sectional view at CC; Figure 10 This is a schematic diagram of the external shape of the anti-frost device according to some embodiments; Figure 11 This is a schematic diagram of the airflow path of a temperature control device in some embodiments.

[0044] The reference numerals in the detailed embodiments are as follows: 1000. Temperature control device; 100. Anti-frost device; 110. Outer insulation shell; r1. Mounting cavity; q. First air passage; q1. First sub-air passage; q11. Inner air passage area; q12. Outer air passage area; q2. Second sub-air passage; q3. Third sub-air passage; c. Air outlet; c1. First air outlet; c2. Second air outlet; k. Mounting hole; 111. Cover plate; h2. Second clearance hole; 111a. First protruding edge; a1. First air passage part; 111b. Second protruding edge; b1. Second air passage part; 111c. Limiting groove; 111d. Connecting groove; 111e. First vent hole; 111f. Second vent hole; h4. Four clearance holes; 112, middle shell; 113, bottom plate; h1, first clearance hole; 113a, third protruding edge; 120, insulation cover; 121, second air passage; 121a, first air passage section; 121b, second air passage section; 122, accommodating cavity; 130, inner insulation shell; 131, heat insulation groove; 132, third clearance hole; 140, air inlet pipe; J, air inlet; 150, insulation layer; 200, test head; 210, head body; 211, flow channel; 212, connecting part; x, flow gap; 213, heat transfer part; 214, heating element; 220, refrigerant pipe connector; 230, fastener. Detailed Implementation

[0045] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0046] In the description of this application, it should be understood that, where they appear, the terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0047] Furthermore, where applicable, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., shall be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral part; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; they may refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] It should be noted that, if an element is described as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is described as "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0051] To address the issue of frost formation on test heads, this application first proposes an anti-frost device. This anti-frost device is used to mount the test head to prevent or mitigate frost formation. In this application, combined with... Figures 1 to 3The test head 200 includes a head body 210 and a refrigerant pipe connector 220. The refrigerant pipe connector 220 communicates with the head body 210 and transmits refrigerant between them. The head body 210 has a connecting portion 212 and a heat transfer portion 213 located at opposite ends along a first direction. The connecting portion 212 is used to fix the head body 210 to a robotic arm or other support structure (such as a floating mechanism or a pressing mechanism). The heat transfer portion 213 is used to contact the test object (such as a chip) to adjust its test temperature. Optionally, a heating element 214 can be provided between the heat transfer portion 213 and the flow channel portion 211. The heating element 214 and the flow channel portion 211 jointly regulate the temperature of the heat transfer portion 213, making the test temperature control of the test head 200 more accurate.

[0052] Understandably, the pressure head body 210 has a heat exchange channel for the flow of refrigerant. The refrigerant pipe connector 220 communicates with the heat exchange channel to allow refrigerant to enter and exit the channel, thus facilitating refrigerant flow within it. In this document, the structure containing the heat exchange channel is defined as the channel section 211. The channel section 211 can be integrally connected to the heat transfer section 213, or it can be separately thermally connected to the heat transfer section 213. The refrigerant pipe connector 220 is connected to the channel section 211.

[0053] The anti-frost device 100 of this application is described in detail below.

[0054] Please refer to Figure 1 and Figure 3 The anti-frost device 100 in this embodiment includes an outer insulation shell 110, an insulation cover 120, and an air inlet J. The outer insulation shell 110 includes a mounting cavity r1, a first clearance hole h1, a second clearance hole h2, and a first air passage q. The first clearance hole h1 is used to pass through the heat transfer part 213, and the second clearance hole h2 is used to pass through the connecting part 212. The inner wall of the first clearance hole h1 is configured to define an air outlet c together with the heat transfer part 213, and / or the inner wall of the second clearance hole h2 is configured to define an air outlet c together with the connecting part 212. The first air passage q is defined by the inner wall of the mounting cavity r1 and is provided around at least a portion of the outer wall surface of the pressure head body 210 located within the mounting cavity r1. The insulation cover 120 is mounted on the outer insulation shell 110 and is used to accommodate the refrigerant pipe connector 220 and form a second air passage 121. Both the first air passage q and the second air passage 121 communicate with the air outlet c. The air inlet J is located on the outer insulation shell 110 and / or insulation cover 120, and is connected to the first air passage q and the second air passage 121.

[0055] Understandably, the first clearance hole h1 and the second clearance hole h2 are respectively connected to opposite ends of the mounting cavity r1 along the first direction. In one usage state, the test head 200 presses against the test object in a vertical direction, with the first direction corresponding to the vertical direction. The first clearance hole h1 is located below the mounting cavity r1, and the second clearance hole h2 is located above the mounting cavity r1. Of course, the specific orientation of the first direction changes depending on the usage posture of the test head 200. If the first direction is described as the vertical direction in the following text, this is not a limitation on the usage method.

[0056] The anti-frost device 100 includes an air inlet J and an air outlet c. The air inlet J is disposed on at least one of the outer insulation shell 110 and the insulation cover 120. The air outlet c is located at a first clearance hole h1 and / or a second clearance hole h2. When the air outlet c is located at the first clearance hole h1, and the heat transfer part 213 passes through the first clearance hole h1, a gap is formed between the hole wall of the first clearance hole h1 and the heat transfer part 213, and this gap constitutes the air outlet c. When the air outlet c is located at the second clearance hole h2, and the connecting part 212 passes through the second clearance hole h2, a gap is formed between the hole wall of the second clearance hole h2 and the connecting part 212, and this gap constitutes the air outlet c.

[0057] In practical applications, when the test pressure head 200 is installed on the anti-frost device 100, the flow channel portion 211 of the pressure head body 210 is housed in the mounting cavity r1. The inner wall of the mounting cavity r1 defines a first air passage q. When the test pressure head 200 is installed on the anti-frost device 100, the first air passage q surrounds at least a portion of the outer wall of the flow channel portion 211. The mounting cavity r1 connects the air outlet c and the air inlet J, that is, the first air passage q connects the air outlet c and the air inlet J. Figure 4 and Figure 5 I understand that an air intake pipe 140 can be installed at the air intake port J to connect to the air source.

[0058] When the test pressure head 200 is installed on the anti-frost device 100, the refrigerant pipe connector 220 passes through the outer insulation shell 110 and extends into the insulation cover 120. The insulation cover 120 is located outside the outer insulation shell 110, and the connection method between the two is not limited. The insulation cover 120 is provided with a second air passage 121, which communicates with the air inlet J and the air outlet c. Understandably, the gas flowing through the second air passage 121 can flow over the outer wall of the refrigerant pipe connector 220 located on the insulation cover 120.

[0059] In practical applications, when the test pressure head 200 is installed on the anti-frost device 100, airflow is introduced into the air inlet J, and the airflow flows to the first air passage q and the second air passage 121. Since refrigerant flows inside the flow channel 211, its outer wall is prone to frost formation. By having the first air passage q surround at least part of the outer wall of the flow channel 211, the airflow can fully exchange heat with the outer wall of the flow channel 211, greatly reducing the problem of frost formation on the outer wall of the flow channel 211. Since refrigerant flows inside the refrigerant pipe connector 220, its outer wall is also prone to frost formation. The airflow flowing through the second air passage 121 exchanges heat with the refrigerant pipe connector 220, also greatly reducing the problem of frost formation on the refrigerant pipe connector 220. Because the air outlet c is located at the first clearance hole h1 and / or the second clearance hole h2, the airflow entering the first air passage q flows out from at least one end of the mounting cavity r1, making the airflow more evenly distributed in the first air passage q, improving the anti-frost effect of the flow channel 211.

[0060] In summary, after the anti-frost device 100 in this embodiment is assembled with the test head 200, airflow is introduced through the air inlet J. Under the arrangement of the first air passage q, the second air passage 121 and the air outlet c, the airflow can exchange heat with the parts of the test head 200 that are prone to frost relatively fully and evenly, which can effectively prevent or slow down the frost formation on the test head 200.

[0061] The outer insulation shell 110 and the insulation cover 120 have thermal insulation properties to reduce heat loss from airflow and improve anti-frost performance. Both can be made of insulating materials such as polyurethane foam, foam glass, polystyrene, phenolic foam, etc. Alternatively, both can be covered with an insulation layer 150, such as a fiberglass layer, aluminum foil, silicone cloth, or an insulating coating.

[0062] The air outlet c is defined by the first clearance hole h1 and / or the first clearance hole h1, which allows the airflow to fully contact and exchange heat with the outer wall of the test head 200 before air is discharged. This prevents the airflow from being discharged before it has fully flowed through the air passage (such as the first air passage q and / or the second air passage 121), which would lead to a decrease in the overall anti-frost uniformity. In addition, each clearance hole can take into account both installation requirements and air discharge requirements, making it multifunctional, reducing the structural complexity of the anti-frost device 100, and reducing manufacturing costs.

[0063] In one embodiment, combined with Figure 3 and Figure 4 It is understood that the anti-frost device 100 also includes an inner insulation shell 130, which is located in the mounting cavity r1 and is used to cover the pressure head body 210 located in the mounting cavity r1. The first air passage q is formed by the inner wall of the mounting cavity r1 and the inner insulation shell 130.

[0064] That is, an inner insulation shell 130 is provided on the inner wall of the outer insulation shell 110, the flow channel 211 of the pressure head body 210 is installed inside the inner insulation shell 130, the first air channel q surrounds the inner insulation shell 130, and the heat of the airflow in the first air channel q is transferred to the flow channel 211 through the inner insulation shell 130, so as to prevent or slow down the frost formation on the surface of the flow channel 211.

[0065] The inner insulation shell 130 has thermal insulation properties. Located between the first air passage q and the flow channel 211, it prevents excessive heat carried by the airflow in the first air passage q from being transferred to the flow channel 211, reducing heat loss from the flow channel 211 and improving the refrigerant's cooling capacity utilization. The inner insulation shell 130 can be made of insulating material or have an insulating coating on its surface. Insulating materials can include polyethylene, polyester, polystyrene, phenolic foam, etc. Insulating coatings can include ceramic coatings, aluminum-based reflective coatings, etc.

[0066] It is worth noting that the inner insulation shell 130 can cover the remaining outer surface of the flow channel 211 except for the connection with the heat transfer section 213 and the connecting section 212, so that the airflow in the first air passage q does not directly contact the flow channel 211.

[0067] Further in the embodiments, refer to Figure 3 A heat insulation groove 131 is provided on the inner wall of the inner heat insulation shell 130, and the pressure head body 210 located inside the inner heat insulation shell 130 covers the groove opening of the heat insulation groove 131.

[0068] Multiple heat insulation grooves 131 can be spaced out on the inner wall of the inner insulation shell 130. The opening of each heat insulation groove 131 faces the pressure head body 210 located inside the inner insulation shell 130 and is covered by the pressure head body 210.

[0069] At this time, the heat insulation groove 131 reduces the contact area between the inner insulation shell 130 and the flow channel 211. The air insulation layer formed in the heat insulation groove 131 can slow down the heat transfer between the inner insulation shell 130 and the flow channel 211, and further reduce the cold loss of the flow channel 211.

[0070] In another embodiment, the first air passage q is defined by the inner wall of the mounting cavity r1 and at least a portion of the outer wall of the pressure head body 210 located in the mounting cavity r1.

[0071] At this time, the flow channel 211 is directly located in the mounting cavity r1, and the airflow flowing through the first air passage q directly contacts the outer surface of the flow channel 211. Using a lower temperature airflow can prevent or slow down the frost formation on the outside of the flow channel 211, reduce the energy consumption of the heated airflow, and simplify the structure of the anti-frost device 100.

[0072] In some embodiments, the first air passage q is directly connected between the air inlet J and the air outlet c, and the second air passage 121 is connected to the air inlet J and the air outlet c via the first air passage q.

[0073] The airflow enters the first air passage q through the air inlet J. During the flow, part of the airflow continues to flow along the first air passage q, while part of the airflow is diverted into the second air passage 121, and then returns to the first air passage q, finally flowing out through the air outlet c.

[0074] At this time, the air inlet J is generally set on the outer insulation shell 110, and the air inlet J does not need to be set on the insulation cover 120. The first air passage q and the second air passage 121 share the air inlet J, which can reduce the number of air inlets J, reduce the number of pipelines, and simplify the structure of the anti-frost device 100.

[0075] In other embodiments, the second air passage 121 may also be directly connected to the air inlet J. For example, the air inlet J may be directly machined into the insulation cover 120.

[0076] In some embodiments, combined with Figure 3 and Figure 4 It is understood that the anti-frost device 100 includes an insulation layer 150, which is disposed on the outer surface of the outer insulation shell 110 and surrounds the second clearance hole h2.

[0077] Specifically, an insulation layer 150 can be applied to the outer surface of the area surrounding the second clearance hole h2 of the outer insulation shell 110. The insulation layer 150 can be insulation cotton, insulation coating, etc., and is not limited thereto.

[0078] In practical applications, the second clearance hole h2 is located on the top wall of the outer insulation shell 110 (specifically, the top wall can be formed by the cover plate 111 described below), and the top wall participates in defining the first air passage q. Covering the outer surface of the top wall of the outer insulation shell 110 with an insulation layer 150 can reduce the heat loss of the airflow in the first air passage q and improve its heat utilization rate.

[0079] In some embodiments, combined with Figure 3 and Figure 4 It is understood that the air outlet c includes the first air outlet c1 defined by the inner wall of the first clearance hole h1. The air inlet J is located at the end of the outer insulation shell 110 away from the first clearance hole h1, and the first air passage q is directly connected between the air inlet J and the first air outlet c1.

[0080] In practical applications, the air inlet J is located at the top of the outer insulation shell 110, and the first air outlet c1 is located at the bottom of the outer insulation shell 110. After the airflow enters the first air passage q through the top air inlet J, at least part of the airflow flows from top to bottom around the outer wall of the flow channel 211, and finally exits through the first air outlet c1. At this time, under the action of gravity and pressure difference, a stable and uniform downward flow field can be formed in the first air passage q, improving the anti-frost effect of the flow channel 211.

[0081] In addition, placing the air inlet J on the top of the outer insulation shell 110 makes the installation layout of the air inlet pipe 140 more convenient.

[0082] Specifically, in the embodiments, refer to Figure 5 and Figure 6 It is understood that the outer insulation shell 110 includes a cover plate 111 and a middle shell 112. The middle shell 112 is arranged around a first direction, and the cover plate 111 covers one end of the middle shell 112 in the first direction. The two together define the mounting cavity r1. The second clearance hole h2 and the air inlet J are provided on the cover plate 111. The first air passage q includes a first sub-air passage q1 defined by the inner wall of the cover plate 111 and a second sub-air passage q2 defined by the inner wall of the middle shell 112. The two are connected. The first sub-air passage q1 is connected to the air inlet J, and the second sub-air passage q2 is connected to the first air outlet c11.

[0083] In practical applications, the cover plate 111 is located above the middle shell 112, which surrounds the first direction to form an open cavity at the top. The cover plate 111 covers the open end of the cavity. The cover plate 111 and the middle shell 112 can be fixed together by welding, fastening, bonding, or other methods.

[0084] When an inner insulation shell 130 is installed inside the outer insulation shell 110, combined with Figure 3 It is understood that the first sub-air duct q1 can be formed by the cover plate 111 and the inner insulation shell 130 spaced apart, and the second sub-air duct q2 can be formed by the middle shell 112 and the inner insulation shell 130 spaced apart. The first sub-air duct q1 is located above the flow channel 211, and the second sub-air duct q2 is arranged around the flow channel 211 in a first direction. The airflow enters the first sub-air duct q1 through the air inlet J, first defrosting the top of the flow channel 211, and then the airflow flows along the four edges of the flow channel 211 to the second sub-air duct q2, defrosting the four sides of the flow channel 211 arranged in the first direction, and finally flows out through the first air outlet c1 at the bottom.

[0085] In this way, the first air passage q achieves defrosting of the top and sides of the flow passage 211, with a large defrosting area, which can effectively prevent or slow down the frost formation in the flow passage 211.

[0086] Specifically, in the embodiments, combined with Figure 6 , Figure 7 and Figure 8Understandably, the inner wall of the cover plate 111 has a protruding first protruding edge 111a surrounding the second clearance hole h2. The first protruding edge 111a is used to abut against the outer wall of the pressure head body 210 or the inner insulation shell 130 covering the pressure head body 210. The projections of the first sub-air passage q1 and the air inlet J along the first direction are located within the area enclosed by the first protruding edge 111a. The first protruding edge 111a is provided with a first air passage a1 connecting the first sub-air passage q1 and the second sub-air passage q2.

[0087] The first air passage a1 can be an air passage hole, air passage groove, etc. formed on the first convex edge 111a. Specifically, when the first air passage a1 is an air passage groove, the first convex edge 111a is composed of multiple sub-convex edges, which are arranged at intervals along the direction surrounding the second clearance hole h2, and the space formed between adjacent sub-convex edges serves as the air passage groove.

[0088] In practical applications, such as Figure 8 As shown, the first protruding edge 111a abuts against the top of the flow channel 211 or against the top of the inner insulation shell 130 covering the flow channel 211. On the one hand, it limits the flow channel 211 or the inner insulation shell 130, and on the other hand, it can effectively define the first sub-air channel q1, ensure the unobstructed flow of the first sub-air channel q1, and increase the residence time of the airflow in the first sub-air channel q1, thereby improving the anti-frost effect on the top of the pressure head body 210.

[0089] The first protruding edge 111a surrounds the second clearance hole h2, and the air inlet J and the first sub-air passage q1 are located within its enclosure. Typically, the first protruding edge 111a is provided with a plurality of first air passages a1 at intervals along its enclosure direction. The airflow in the first sub-air passage q1 is diverted to various parts of the second sub-air passage q2 through each first air passage a1, ensuring the uniformity of airflow distribution in the second sub-air passage q2 and improving the anti-frost uniformity of the flow channel 211.

[0090] Further in the embodiments, combined with Figure 8 It is understood that the first protruding edge 111a is configured to extend along the periphery of the inner insulation shell 130 it abuts or along the periphery of the pressure head body 210 it abuts. Along the first direction, the projection of the second air passage 121 is located between the first protruding edge 111a and the inner wall of the middle shell 112.

[0091] Understandably, the top periphery of the inner insulation shell 130 or the top periphery of the pressure head body 210 is located in the edge area of ​​both. By abutting the first convex edge 111a against the corner area, the limiting effect of the outer insulation shell 110 on the edge area of ​​the inner insulation shell 130 or the pressure head body 210 can be improved, thereby improving the positional installation reliability of the pressure head body 210 and the inner insulation shell 130.

[0092] Meanwhile, the projection of the second sub-air passage q2 along the first direction is located between the first convex edge 111a and the inner wall of the middle shell 112, indicating that the outline projection of the first convex edge 111a basically coincides with the peripheral projection of the inner insulation shell 130 or the peripheral projection of the pressure head body 210. When the airflow flows through the first air passage a1 to the second sub-air passage q2, it reduces the obstruction of the airflow by the peripheral edge of the inner insulation shell 130 or the peripheral corner area of ​​the pressure head body 210, improves the airflow efficiency, and helps to improve the anti-frost effect.

[0093] Of course, in other embodiments, the first protruding edge 111a may also be at a certain distance from the periphery of the inner insulation shell 130 or the periphery of the pressure head body 210.

[0094] In some embodiments, please refer to Figure 5 , Figure 6 and Figure 7 The cover plate 111 is provided with a first vent 111e and a second vent 111f, both of which are connected to the second air passage 121. The first vent 111e is located within the enclosure of the first protruding edge 111a and is connected to the first sub-air passage q1. The second vent 111f is located outside the enclosure of the first protruding edge 111a and is connected to the second sub-air passage q2.

[0095] At this time, the insulation cover 120 is installed on the cover plate 111. When the anti-frost device 100 includes an inner insulation shell 130, the inner insulation shell 130 is provided with a third clearance hole 132, and the cover plate 111 is provided with a fourth clearance hole h4 aligned with the third clearance hole 132, the refrigerant pipe connector 220 passes through the third clearance hole 132 and the fourth clearance hole h4 in sequence and is then inserted into the insulation cover 120, and finally passes through the insulation cover 120 to connect with the external refrigerant source.

[0096] When airflow is introduced into the air inlet J, the airflow enters the first sub-air passage q1 and is split. One stream of airflow enters the insulation cover 120 through the first vent 111e, defrosting the surface of the refrigerant pipe joint 220 inside the insulation cover 120, and then flows to the second sub-air passage q2 through the second vent 111f. The other stream of airflow flows directly to the second sub-air passage q2 through the first air outlet a1. The two streams of airflow merge in the second sub-air passage q2 and continue to flow along the second sub-air passage q2 toward the first air outlet c1.

[0097] At this time, the heat insulation cover 120 is set on the cover plate 111, and the first vent hole 111e and the second vent hole 111f are machined on the cover plate 111 so that the air inlet and outlet of the second air passage 121 are connected to the first air passage q, which greatly simplifies the internal air passage distribution and improves the utilization rate of airflow thermal efficiency.

[0098] Typically, in order to accelerate the airflow speed and improve the anti-frost efficiency, there are multiple first vent holes 111e and second vent holes 111f.

[0099] In some embodiments, please refer to Figure 8 The insulation cover 120 includes a receiving cavity 122, and the second air passage 121 includes a first air passage section 121a and a second air passage section 121b. The receiving cavity 122 is used to pass through the refrigerant pipe connector 220. The first air passage section 121a is aligned and connected to the first vent hole 111e, and the second air passage section 121b is aligned and connected to the second vent hole 111f. The receiving cavity 122 connects the first air passage section 121a and the second air passage section 121b.

[0100] Specifically, the first air passage segment 121a and the second air passage segment 121b are formed inside the wall of the heat insulation cover 120 and communicate with the accommodating cavity 122 enclosed by the heat insulation cover 120. The first air passage segment 121a is arranged approximately along the depth of the first direction and is aligned and communicated with the first vent hole 111e along the first direction. The second air passage segment 121b is arranged approximately along the depth of the first direction and is aligned and communicated with the second vent hole 111f along the first direction. The air outlet end of the first air passage segment 121a and the air inlet end of the second air passage segment 121b can be flush in the first direction. The number of first air passage segments 121a may be equal to the number of first vent holes 111e and correspond one-to-one. The number of second air passage segments 121b may be equal to the number of second vent holes 111f and correspond one-to-one. Understandably, the accommodating cavity 122, the fourth clearance hole h4, and the third clearance hole 132 are aligned and communicated along the first direction.

[0101] At this time, by forming the first air passage section 121a and the second air passage section 121b inside the insulation cover 120, the air inlet and outlet positions of the accommodating cavity 122 can be raised in the first direction, making the airflow distribution in the accommodating cavity 122 more uniform and improving the anti-frost effect on the refrigerant pipe joint 220.

[0102] In some embodiments, please combine Figure 6 , Figure 7 and Figure 8 Understanding is that the inner wall of the cover plate 111 has a protruding second protruding edge 111b surrounding the second clearance hole h2. The second protruding edge 111b is used to abut against the outer wall of the pressure head body 210 or the inner insulation shell 130 covering the pressure head body 210, and divides the first sub-air passage q1 into an inner air passage area q11 and an outer air passage area q12. The inner air passage area q11 is connected to the second clearance hole h2 and is used to pass through the connecting part 212. The outer air passage area q12 is connected to the air inlet J. A second air passage part b1 is provided on the second protruding edge 111b to connect the inner air passage area q11 and the outer air passage area q12. The outer air passage area q12 is connected to the second sub-air passage q2.

[0103] The second protruding edge 111b is located within the enclosure of the first protruding edge 111a, and can abut against the inner insulation shell 130 or the pressure head body 210 along the first direction, thus dividing the first sub-air passage q1 into two air passage zones. Along the first direction, the projection of the air inlet J is located within the projection range of the outer air passage zone q12, the projection of the second clearance hole h2 is located within the projection range of the inner air passage zone q11, and the connecting part 212 passing through the second clearance hole h2 simultaneously passes through the inner air passage zone q11.

[0104] A second air passage portion b1 is provided on the second protruding edge 111b. The second air passage portion b1 can be an air passage hole or an air passage groove. Specifically, when the second air passage portion b1 is an air passage groove, the second protruding edge 111b is composed of multiple sub-protruding edges, which are arranged at intervals along the direction surrounding the second clearance hole h2, and the space formed between adjacent sub-protruding edges serves as the air passage groove.

[0105] After the airflow enters the outer air passage q12 through the air inlet J, it is split. One airflow flows through the first air passage a1 to the second sub-air passage q2, while the other flows through the second air passage b1 into the inner air passage q11. In some cases, a gap exists between the second clearance hole h2 and the through-connection 212, forming a second air outlet c2. The inner air passage q11 communicates with the outside through the second air outlet c2, and the airflow entering the inner air passage q11 finally flows out of the outer insulation shell 110 through the second air outlet c2. If the cover plate 111 is provided with a first vent hole 111e, the first vent hole 111e is located in the outer air passage q12. A portion of the airflow in the outer air passage q12 enters the second air passage 121 through the first vent hole 111e and flows back to the second sub-air passage q2 through the second vent hole 111f.

[0106] At this time, the second protruding edge 111b can enhance the strength of the cover plate 111 and improve the installation stability of the connection part 212. If the second clearance hole h2 defines the second air outlet c2, the second protruding edge 111b can also prevent the airflow in the first sub-air passage q1 from flowing to the second air outlet c2, thereby increasing the residence time of the airflow in the first sub-air passage q1 and improving the anti-frost effect on the top of the pressure head body 210.

[0107] Specifically, in the embodiments, combined with Figure 6 and Figure 7 It is understood that the cover plate 111 has a recessed limit groove 111c on the inner wall of the inner air passage q11, and the second clearance hole h2 penetrates the bottom of the limit groove 111c. The limit groove 111c is used to limit the installation connection part 212.

[0108] The shape of the limiting groove 111c is adapted to the contour of the connecting part 212, realizing the positioning and installation of the connecting part 212 and improving the installation efficiency of the test head 200. When the second clearance hole h2 defines the second air outlet c2, there is a certain gap between the limiting groove 111c and the connecting part 212 to allow airflow between the second air outlet c2 and the inner air passage zone q11.

[0109] Further in the embodiments, refer to Figure 6 The cover plate 111 includes a connecting groove 111d, which extends obliquely on the groove wall of the limiting groove 111c and connects the limiting groove 111c with the inner wall of the inner air passage zone q11.

[0110] It can be understood that the connecting groove 111d is a notch formed on the limiting groove 111c, which is used to connect the space inside the limiting groove 111c with the inner air passage area q11. When the connecting part 122 is positioned and installed in the limiting groove 111c, the connecting groove 111d can ensure that the airflow in the inner air passage area q11 smoothly enters the limiting groove 111c and then flows to the second air outlet c22.

[0111] The number of connecting slots 111d can be multiple.

[0112] In some embodiments, refer to Figure 3 and Figure 8 The air outlet c includes a second air outlet c2 defined by the inner wall of the second clearance hole h2, and the second air outlet c2 is connected to the first sub-air passage q1.

[0113] Specifically, the second air outlet c2 is formed by the inner wall of the second clearance hole h2 and the connecting part 212 at intervals. The setting of the second air outlet c2 allows the airflow in the first sub-air passage q1 to flow in both the direction of the first air outlet c1 and the direction of the second air outlet c2, making the airflow distribution in the first sub-air passage q1 more uniform and improving the anti-frost effect on the top of the pressure head body 210. Moreover, this dual air outlet path design reduces the local back pressure of the first sub-air passage q1, reduces flow resistance and airflow impact force, helps to reduce device energy consumption and improve device service life. In addition, the second air outlet c2 is defined by the second clearance hole h2. By reasonably designing the diameter of the second clearance hole h2, no additional processing costs are required, which simplifies the processing steps of the anti-frost device 100 and reduces processing costs.

[0114] In some embodiments, combined with Figure 3 and Figure 4It is understood that the outer insulation shell 110 also includes a bottom plate 113, which is located at one end of the middle shell 112 away from the cover plate 111. The first clearance hole h1 is located on the bottom plate 113. The first air passage q includes a third sub-air passage q3 defined by the bottom plate 113. The third sub-air passage q3 connects the first clearance hole h1 and the second sub-air passage q2.

[0115] The cover plate 111, the middle shell 112, and the bottom plate 113 together form the mounting cavity r1. The bottom plate 113, together with the inner insulation shell 130 or the pressure head body 210, forms the third sub-air passage q3. The third sub-air passage q3 is located below the pressure head body 210 and is located between the first air outlet c1 and the second sub-air passage q2 in the airflow path.

[0116] Part of the airflow entering the intake port J first defrosts the top of the pressure head body 210 through the first sub-air passage q1, then defrosts the sides of the pressure head body 210 through the second sub-air passage q2, then defrosts the bottom of the pressure head body 210 through the third sub-air passage q3, and finally exits through the first outlet c1. In this way, the first air passage q provides all-around defrosting of the pressure head body 210, greatly improving the anti-frost effect of the pressure head body 210.

[0117] In one embodiment, reference is made to Figure 3 , Figure 4 , Figure 5 and Figure 8 The inner wall of the base plate 113 is provided with a third protruding edge 113a, which surrounds the first clearance hole h1. Understandably, a gap is formed between the third protruding edge 113a and the bottom of the pressure head body 210 or the bottom of the inner insulation shell 130, which allows airflow to flow to the first air outlet c1.

[0118] After the airflow enters the third sub-air passage q3 and defrosts the bottom of the pressure head body 210, it slowly flows towards the first air outlet c1 due to the obstruction of the third protrusion 113a. This prolongs the residence time of the airflow in the third sub-air passage q3, improves the contact efficiency between the airflow and the inner insulation shell 130 or the pressure head body 210, enhances the heat utilization rate of the airflow, and helps to improve the anti-frost effect of the pressure head body 210.

[0119] The cover plate 111 and the middle shell 112 can be fastened or bonded together, and a sealing structure such as a sealing ring can be provided at the connection. The bottom plate 113 and the middle shell 112 can be fastened or bonded together, and a sealing structure such as a sealing ring can be provided at the connection.

[0120] To secure the pressure head body 210 to the anti-frost device 100, in one embodiment, the outer insulation shell 110 is provided with a mounting hole k, and a fastener 230 passes through the mounting hole k to securely connect the pressure head body 210 to the outer insulation shell 110. The fastener 230 can be a bolt, screw, etc.

[0121] In one specific embodiment, combined with Figure 9 and Figure 10 It is understood that the cover plate 111 is provided with mounting holes k, and the inner insulation shell 130 is provided with connecting holes (not shown) corresponding to mounting holes k. Fasteners 230 pass through mounting holes k and connecting holes and are fastened to the pressure head body 210. They are also fixed to the connecting part 212, flow channel part 211 and heat transfer part 213 of the pressure head body 210, thereby realizing the fixed connection of the outer insulation shell 110, inner insulation shell 130, connecting part 212, flow channel part 211 and heat transfer part 213, and thus realizing the assembly of the pressure head body 210 and the anti-frost device 100.

[0122] The cover plate 111 is typically provided with multiple mounting holes k, each of which is used to install a fastener 230. The multiple fasteners 230 achieve an effective and reliable connection between the pressure head body 210 and the outer insulation shell 110.

[0123] When the cover plate 111 is provided with a second protruding edge 111b, the mounting hole k is arranged within the enclosure range of the second protruding edge 111b, that is, the mounting hole k is provided in the inner air passage area q11.

[0124] It is worth noting that in some embodiments, the air outlet c2 only includes the second air outlet c22. In this case, the air inlet J can be set at the bottom of the outer insulation shell 110 so that when the airflow flows from bottom to top, it can effectively flow around at least part of the outer wall of the pressure head body 210 located in the mounting cavity r1, ensuring the anti-frost effect of the pressure head body 210.

[0125] In one specific embodiment of this application, the anti-frost device 100 includes an outer insulation shell 110, an inner insulation shell 130, and an insulation cover 120. The inner insulation shell 130 is disposed within the mounting cavity r1 of the outer insulation shell 110. The outer insulation shell 110 and the inner insulation shell 130 are spaced apart to form a first air passage q surrounding the inner insulation shell 130. The outer insulation shell 110 includes a cover plate 111, a middle shell 112, and a bottom plate 113. The cover plate 111 is provided with an air inlet J and a second clearance hole h2, the second clearance hole h2 being used to define a second air outlet c22. The bottom plate 113 is provided with a first clearance hole h1, the first clearance hole h1 being used to define a first air outlet c11. The first air passage q includes a first sub-air passage q1 defined by the cover plate 111, a second sub-air passage q2 defined by the middle shell 112, and a third sub-air passage q3 defined by the bottom plate 113. The third sub-air passage q3 is directly connected to the first air outlet c11. The cover plate 111 is provided with a first protruding edge 111a and a second protruding edge 111b. The first protruding edge 111a surrounds the first sub-air passage q1 and is provided with a first air passage a1. The second protruding edge 111b is located inside the first sub-air passage q1 and is provided with a second air passage b1, dividing the first sub-air passage q1 into an outer air passage area q12 and an inner air passage area q11. The air inlet J is connected to the outer air passage area q12, and the second air outlet c22 is connected to the inner air passage area q11. The heat insulation cover 120 is provided on the outer heat insulation shell 110 and forms the second air passage 121. The first vent 111e provided on the cover plate 111 of the first sub-airway q1 is connected to the second airway 121, and the second airway 121 is connected to the second sub-airway q2 through the second vent 111f provided on the cover plate 111.

[0126] In practical applications, such as Figure 11 As shown, the airflow entering from the inlet J into the outer air passage q12 of the first sub-air passage is split into three paths. The first path of airflow (indicated by the red arrow) enters the inner air passage q11 through the second air passage b1 on the second protrusion 111b, flows through the top of the inner insulation shell 130, and exits from the second outlet c2, defrosting the top of the flow channel 211 located inside the inner insulation shell 130. The second path of airflow (indicated by the purple arrow) enters the second air passage 121 through the first vent 111e, defrosting the refrigerant pipe joint 220 inside the insulation cover 120, and finally flows back to the second sub-air passage, participating in the defrosting of the pressure head body 210. The third airflow (indicated by the green arrow) enters the second sub-air passage q2 through the first air passage a1 of the first convex edge 111a, and merges with the second airflow. It then flows around the outer periphery of the inner insulation shell 130 and finally enters the third sub-air passage q3 to defrost the sides and bottom of the flow passage 211 inside the inner insulation shell 130 until it is discharged through the first air outlet c1.

[0127] In this way, efficient and uniform anti-frost treatment is achieved on the surface of the test head 200 (including the head body 210 and the refrigerant pipe connector 220), which can effectively prevent or slow down the frosting of the test head 200.

[0128] In addition, this application embodiment also provides a temperature control device 1000, including a test head 200 and an anti-frost device 100 as described in any of the above embodiments, wherein the head body 210 of the test head 200 is installed in the mounting cavity r1. This temperature control device 1000 includes all the aforementioned beneficial effects, which will not be elaborated upon here.

[0129] In some embodiments, refer to Figure 3 and Figure 4 The connecting part 212 and the second clearance hole h2 form a second air outlet c2, and the part of the connecting part 212 outside the anti-frost device 100 forms a flow gap x between the connecting part 212 and the outer insulation shell 110.

[0130] In practical applications, the connecting part 212 passes through the second clearance hole h2 and connects to the flow channel part 211, while the other part is located outside the anti-frost device 100 and connects to the floating mechanism or the pressing mechanism, so as to realize the installation of the temperature control device 1000 on the floating mechanism or the pressing mechanism.

[0131] When the airflow exits from the second outlet c2, it diffuses into the environment along the flow gap x. In this way, the connection part 212 will not block the second outlet c2, reducing the airflow resistance inside the anti-frost device 100 and improving the airflow efficiency of the temperature control device 1000.

[0132] In some embodiments, the test head 200 includes a fastener 230. A mounting hole k is provided on the outer insulation shell 110, and the fastener 230 secures the head body 210 to the anti-frost device 100 via the mounting hole k. The fastener 230 can be a bolt, screw, etc. Using the fastener 230 to securely connect the head body 210 and the anti-frost device 100 results in a simple structure that is easy to implement.

[0133] For details on the fasteners, mounting holes, anti-frost devices, and the specific fixing methods of the pressure head body, please refer to the description above, which will not be repeated here.

[0134] In addition, this application embodiment also provides a testing device, including the aforementioned temperature control device. This testing device may be, but is not limited to, a testing and sorting machine.

[0135] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0136] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An anti-frost device (100), characterized in that, For preventing or mitigating frost formation on a test head (200), the test head (200) includes a head body (210) and a refrigerant pipe connector (220), the refrigerant pipe connector (220) communicating with the head body (210) and transmitting refrigerant between the head body (210), the head body (210) having a connecting portion (212) and a heat transfer portion (213) located at opposite ends along a first direction (Z), the anti-frost device (100) includes: The outer insulation shell (110) includes a mounting cavity (r1), a first clearance hole (h1), a second clearance hole (h2), and a first air passage (q). The mounting cavity (r1) is used to mount the pressure head body (210). The first clearance hole (h1) is used to pass through the heat transfer part (213). The second clearance hole (h2) is used to pass through the connecting part (212). The inner wall of the first clearance hole (h1) is configured to define an air outlet (c) together with the heat transfer part (213) and / or the inner wall of the second clearance hole (h2) is configured to define an air outlet (c) together with the connecting part (212). The first air passage (q) is defined by the inner wall of the mounting cavity (r1) and is used to surround at least a portion of the outer wall surface of the pressure head body (210) located in the mounting cavity (r1). An insulation cover (120) is installed on the outer insulation shell (110) to accommodate the refrigerant pipe joint (220) and form a second air passage (121). Both the first air passage (q) and the second air passage (121) are connected to the air outlet (c). An air inlet (J) is provided on the outer insulation shell (110) and / or the insulation cover (120), and connects the first air passage (q) and the second air passage (121).

2. The anti-frost device (100) according to claim 1, characterized in that, The anti-frost device (100) further includes an inner insulation shell (130), which is located in the mounting cavity (r1) and is used to cover the pressure head body (210) located in the mounting cavity (r1). The first air passage (q) is formed by the inner wall of the mounting cavity (r1) and the inner insulation shell (130) spaced apart; or, The first air passage (q) is defined by the inner wall of the mounting cavity (r1) and at least a portion of the outer wall of the pressure head body (210) located in the mounting cavity (r1).

3. The anti-frost device (100) according to claim 1, characterized in that, The first air passage (q) is directly connected between the air inlet (J) and the air outlet (c), and the second air passage (121) is connected to the air inlet (J) and the air outlet (c) via the first air passage (q); and / or, The anti-frost device (100) includes a heat insulation layer (150), which is disposed on the outer surface of the outer heat insulation shell (110) and surrounds the second clearance hole (h2).

4. The anti-frost device (100) according to any one of claims 1 to 3, characterized in that, The air outlet (c) includes a first air outlet (c1) defined by the inner wall of the first clearance hole (h1), the air inlet (J) is located at the end of the outer insulation shell (110) away from the first clearance hole (h1), and the first air passage (q) is directly connected between the air inlet (J) and the first air outlet (c1).

5. The anti-frost device (100) according to claim 4, characterized in that, The outer insulation shell (110) includes a cover plate (111) and a middle shell (112). The middle shell (112) is arranged around the first direction (Z). The cover plate (111) covers one end of the middle shell (112) in the first direction (Z). Both of them help to define the mounting cavity (r1). The second clearance hole (h2) and the air inlet (J) are provided on the cover plate (111). The first air passage (q) includes a first sub-air passage (q1) defined by the inner wall of the cover plate (111) and a second sub-air passage (q2) defined by the inner wall of the middle shell (112), which are connected to each other; the first sub-air passage (q1) is connected to the air inlet (J), and the second sub-air passage (q2) is connected to the first air outlet (c1).

6. The anti-frost device (100) according to claim 5, characterized in that, The inner wall of the cover plate (111) is provided with a first protruding edge (111a) surrounding the second clearance hole (h2). The first protruding edge (111a) is used to abut against the outer wall of the pressure head body (210) or to abut against the inner heat insulation shell (130) covering the pressure head body (210). The projection of the first sub-air passage (q1) and the air inlet (J) along the first direction (Z) is located within the enclosure of the first convex edge (111a), and the first convex edge (111a) is provided with a first air passage (a1) that connects the first sub-air passage (q1) and the second sub-air passage (q2).

7. The anti-frost device (100) according to claim 6, characterized in that, The first protruding edge (111a) is configured to extend along the periphery of the inner insulation shell (130) it abuts or along the periphery of the pressure head body (210) it abuts; Along the first direction (Z), the projection of the second air passage (121) is located between the first convex edge (111a) and the inner wall of the middle shell (112).

8. The anti-frost device (100) according to claim 6, characterized in that, The cover plate (111) is provided with a first vent (111e) and a second vent (111f), both of which are connected to the second air passage (121); The first vent (111e) is located within the enclosure of the first protruding edge (111a) and communicates with the first sub-air passage (q1). The second vent (111f) is located outside the enclosure of the first protruding edge (111a) and communicates with the second sub-air passage (q2).

9. The anti-frost device (100) according to claim 8, characterized in that, The heat insulation cover (120) includes a receiving cavity (122), and the second air passage (121) includes a first air passage section (121a) and a second air passage section (121b). The receiving cavity (122) is used to pass through a refrigerant pipe connector (220). The first air passage section (121a) is aligned and connected with the first vent hole (111e), and the second air passage section (121b) is aligned and connected with the second vent hole (111f). The receiving cavity (122) connects the first air passage section (121a) and the second air passage section (121b).

10. The anti-frost device (100) according to claim 6, characterized in that, The inner wall of the cover plate (111) is provided with a second protruding edge (111b) surrounding the second clearance hole (h2). The second protruding edge (111b) is used to abut against the outer wall of the pressure head body (210) or to abut against the inner heat insulation shell (130) covering the pressure head body (210), and divides the first sub-air passage (q1) into an inner air passage area (q11) and an outer air passage area (q12). The inner air passage area (q11) is connected to the second clearance hole (h2) and is used to pass through the connecting part (212). The outer air passage area (q12) is connected to the air inlet (J). The second convex edge (111b) is provided with a second air passage (b1) that connects the inner air passage area (q11) and the outer air passage area (q12), and the outer air passage area (q12) is connected to the second sub-air passage (q2).

11. The anti-frost device (100) according to claim 10, characterized in that, The cover plate (111) is recessed on the inner wall of the inner air passage area (q11) and a limiting groove (111c) is provided. The second clearance hole (h2) penetrates the bottom of the limiting groove (111c). The limiting groove (111c) is used to limit the installation of the connecting part (212).

12. The anti-frost device (100) according to claim 5, characterized in that, The air outlet (c) includes a second air outlet (c2) defined by the inner wall of the second clearance hole (h2), and the second air outlet (c2) is connected to the first sub-air passage (q1).

13. The anti-frost device (100) according to claim 5, characterized in that, The outer insulation shell (110) also includes a bottom plate (113), which is located at one end of the middle shell (112) away from the cover plate (111). The first clearance hole (h1) is located on the bottom plate (113). The first air passage (q) includes a third sub-air passage (q3) defined by the bottom plate (113). The third sub-air passage (q3) connects the first clearance hole (h1) and the second sub-air passage (q2).

14. A temperature control device (1000), characterized in that, include: Test head (200); and In the anti-frost device (100) as described in any one of claims 1-13, the pressure head body (210) of the test pressure head (200) is installed in the mounting cavity (r1).

15. The temperature control device (1000) according to claim 14, characterized in that, The connecting portion (212) and the second clearance hole (h2) form a second air outlet (c2) at a distance; the portion of the connecting portion (212) outside the anti-frost device (100) forms a flow gap (x) between it and the outer insulation shell (110); and / or, The test head (200) includes a fastener (230), and the outer insulation shell (110) is provided with a mounting hole (k). The fastener (230) fixes the head body (210) to the anti-frost device (100) through the mounting hole (k).

16. A testing device, characterized in that, Includes the temperature control device (1000) as described in claim 14 or 15.

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