Phase change material filling device and control method thereof

Abstract

The invention provides a phase change material filling device and a control method thereof, and belongs to the field of laser heat dissipation, and the phase change material filling device comprises a melting driving unit and a filling unit which communicate with each other; the melting driving unit comprises a first box body, a storage tank, a first discharging pipe, a screw propelling assembly and a second discharging pipe which are sequentially connected are arranged in the first box body, and a motor is arranged at the feeding port end of the screw propelling assembly; the filling unit comprises a second box body, the discharge port end of the second discharge pipe extends into the second box body, a metal hose and a to-be-filled workpiece are arranged in the second box body, one end of the metal hose is connected with the second discharge pipe, and the other end of the metal hose is connected with the to-be-filled workpiece; the outer surfaces of the first box body and the second box body are both provided with heat preservation layers, the inner surfaces of the first box body and the second box body are both provided with heating layers, and the target flow speed of the liquid phase change material at the feeding port end of the to-be-filled workpiece is matched with the rotating speed of the motor and the conveying speed of the screw propelling assembly for conveying the liquid phase change material. According to the invention, rapid and quantitative filling is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of laser heat dissipation, and in particular to a phase change material filling device and a control method thereof. Background Art

[0002] Lasers generate a lot of heat during operation. If the heat cannot be dissipated in a timely and effective manner, it will cause deformation of optical components and even affect the output power of the laser. Phase change materials refer to materials that can provide a large amount of latent heat when the physical state of the material changes. When the physical state changes, the temperature of the material itself remains almost unchanged. It has a high phase change latent heat, stable chemical properties, and is economical and easy to obtain. It is an effective way to achieve laser heat dissipation. However, phase change materials are generally in a solid state at room temperature and need to be heated to a liquid state before filling.

[0003] In order to achieve heat dissipation of the laser, the phase change material needs to be filled in a sealed packaging container to avoid the phase change liquid flowing after the temperature rises, polluting the equipment and being unable to be recycled. In the existing technology, the phase change material is mainly filled by its own gravity, and the filling rate is too slow and cannot be controlled. Summary of the invention

[0004] In view of the technical problems existing in the background technology, the present application provides a phase change material filling device and a control method thereof. The phase change material filling device has a simple structure, is easy to operate, and can achieve rapid and quantitative filling of phase change materials.

[0005] In the first aspect, an embodiment of the present application provides a phase change material filling device, comprising a melt drive unit and a filling unit that are interconnected; the melt drive unit comprises a first box body, the outer surface of the first box body is provided with a first insulation layer, the inner surface is provided with a first heating layer, and the interior is provided with a storage tank, a first discharge pipe, a screw propulsion assembly and a second discharge pipe that are connected in sequence, and the feed port end of the screw propulsion assembly is provided with a motor; the filling unit comprises a second box body, the outer surface of the second box body is provided with a second insulation layer, the inner surface is provided with a second heating layer, the discharge port end of the second discharge pipe extends into the second box body, and a metal hose and a workpiece to be filled are provided in the second box body, one end of the metal hose is connected to the second discharge pipe, and the other end is connected to the workpiece to be filled; the flow rate required for filling the workpiece to be filled with liquid phase change material is adapted to the rotation speed of the motor and the conveying speed of the liquid phase change material by the screw propulsion assembly.

[0006] In the technical solution of the embodiment of the present application, a heating layer is arranged inside the first box and the second box, and an insulation layer is arranged on the outer surface, so that the solid phase change material is in a liquid fillable state; on this basis, according to the size of the feed port of the workpiece to be filled (i.e. the required filling speed) and the volume to be filled, the speed, number of revolutions and working time of the motor are set to achieve rapid and quantitative filling of the workpiece to be filled. The setting of the metal hose avoids the hard connection between the filling device and the workpiece to be filled, and realizes efficient filling of workpieces of multiple sizes and specifications to be filled.

[0007] In some embodiments, the screw propulsion assembly includes a rotating screw and a shell sleeved on the rotating screw, the discharge port end of the first discharge pipe is connected to one end of the shell close to the motor, and the rotating screw is connected to the output shaft of the motor; the rotation speed of the rotating screw depends on the flow rate required for filling the liquid phase change material into the workpiece to be filled.

[0008] In this embodiment, the speed and number of rotations of the motor are controlled, thereby controlling the speed and number of rotations of the rotating screw, and then controlling the transport volume and transport rate of the phase change material transported by the screw propulsion assembly, so that the flow rate of the liquid phase change material at the feed port end of the workpiece to be filled is at the required flow rate, thereby achieving rapid and quantitative filling of the workpiece to be filled.

[0009] In some embodiments, the phase change material filling device also includes an automatic control unit; the automatic control unit includes a control panel, a first solenoid valve arranged on the first discharge pipe, and a second solenoid valve arranged on the second discharge pipe; the first solenoid valve, the second solenoid valve and the motor are electrically connected to the control panel respectively.

[0010] In this embodiment, an automatic control unit is provided, and according to the flow rate required for filling the liquid phase change material into the workpiece to be filled, the automatic control unit can not only adjust the rotation speed of the motor, but also control the opening angle of the first solenoid valve and the second solenoid valve. Through the dual coordination of the motor and the pipeline flow rate, rapid and quantitative filling of the workpiece to be filled can be achieved without overflow of the liquid phase change material.

[0011] In some embodiments, the motor is disposed outside the first housing.

[0012] In this embodiment, by arranging the motor outside the first housing, the motor can be prevented from failing due to the high temperature inside the first housing, thereby extending the service life of the motor.

[0013] In some embodiments, a replaceable interface fitting is provided between the metal hose and the workpiece to be filled.

[0014] In this embodiment, an adapted interface accessory is selected according to the size of the feed opening of the workpiece to be filled, so as to realize the filling of the workpiece to be filled with different feed opening sizes.

[0015] In some embodiments, a liquid level meter and an armored thermocouple are provided on the side wall of the storage tank, and the liquid level meter and the armored thermocouple are electrically connected to the control panel respectively.

[0016] In this embodiment, by providing a liquid level meter and an armored thermocouple, it is convenient for the staff to understand various data of the liquid phase change material in the storage tank, and ensure that the remaining amount and temperature of the liquid phase change material are in a fillable state.

[0017] In some embodiments, a discharge pipe is provided at the lower end of the storage tank, and the automatic control unit further includes a third solenoid valve disposed on the discharge pipe, and the third solenoid valve is electrically connected to the control panel.

[0018] In this embodiment, by arranging a discharge pipe at the lower end of the storage tank, when it is necessary to discharge the remaining phase change material in the storage tank, the phase change material can be discharged smoothly.

[0019] In some embodiments, the automatic control unit further includes a vacuum pump disposed outside the second box and communicated with the second box; the vacuum pump is electrically connected to the control panel.

[0020] In this embodiment, the air inside the second box and the workpiece to be filled is fully extracted by a vacuum pump to make them in a vacuum state, which can not only improve the filling fullness and filling speed of the liquid phase change material in the workpiece to be filled, but also improve the thermal insulation effect of the second box.

[0021] In some embodiments, when the length of the metal hose is less than one quarter of the diagonal length of the second box body, a mobile platform for carrying the workpiece to be filled, a limit block located on the mobile platform, and a lifting mechanism located under the mobile platform are provided in the second box body; the mobile platform includes a mobile layer and a bearing layer which are arranged up and down and slidably connected;

[0022] When the length of the metal hose is greater than or equal to one quarter of the diagonal length of the second box body, a fixed platform for carrying the workpiece to be filled and a limit block located on the fixed platform are provided in the second box body.

[0023] In a second aspect, an embodiment of the present application provides a control method for the above-mentioned phase change material filling device, comprising the following steps:

[0024] S1, connecting the workpiece to be filled with the metal hose;

[0025] S2, adding a solid phase change material into the first box, and heating and melting the solid phase change material through the first heating layer and the first insulation layer;

[0026] S3. Adjust the speed, number of revolutions and working time of the motor to adapt to the flow rate required for filling the liquid phase change material into the workpiece to be filled, so as to achieve rapid and quantitative filling of the workpiece.

[0027] In the technical solution of the embodiment of the present application, by utilizing the phase change material filling device with the above-mentioned specific structure, rapid and quantitative filling of the filling workpiece can be achieved.

[0028] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings used in the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 This is a schematic structural diagram of a phase change material filling device in one form in an embodiment of the present application;

[0031] Figure 2 This is a schematic structural diagram of another form of phase change material filling device in an embodiment of the present application;

[0032] Figure 3 It is a structural schematic diagram of the screw propulsion assembly;

[0033] Explanation of reference numerals: 100-phase change material filling device; 1-melting drive unit; 2-filling unit; 3-workpiece to be filled; 4-automatic control unit; 5-rubber hose; 11-first box; 12-storage tank; 13-first discharge pipe; 14-screw propulsion assembly; 15-second discharge pipe; 16-motor; 17-cover plate; 21-second box; 22-metal hose; 23-interface accessories; 24-moving platform; 25-limit Position block; 26-lifting mechanism; 27-fixed platform; 41-first solenoid valve; 42-second solenoid valve; 43-third solenoid valve; 44-fourth solenoid valve; 45-control panel; 46-vacuum pump; 111-first insulation layer; 112-first heating layer; 121-liquid level gauge; 122-armored thermocouple; 123-discharge pipe; 141-rotating screw; 142-housing; 211-second insulation layer; 212-second heating layer. DETAILED DESCRIPTION

[0034] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0036] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present application.

[0039] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0040] The filling of phase change materials is an effective way to achieve heat dissipation of lasers. However, in the prior art, the filling of phase change materials is mainly achieved by the gravity of the phase change materials themselves, and the filling rate is too slow and cannot be controlled.

[0041] In order to solve the technical problem that the filling rate of phase change material is too slow and the filling rate cannot be controlled, the present application provides a phase change material filling device and a control method thereof, wherein a heating layer is arranged inside the first box body and the second box body, and an insulation layer is arranged on the outer surface, so that the solid phase change material is in a liquid fillable state; on this basis, according to the size of the feed port of the workpiece to be filled (i.e. the required filling speed) and the volume to be filled, the speed, number of revolutions and working time of the motor are set to achieve fast and quantitative filling of the workpiece to be filled. The setting of the metal hose avoids the hard connection between the filling device and the workpiece to be filled, and realizes the efficient filling of workpieces of multiple sizes and specifications to be filled. It has the advantages of wide applicability and high filling rate of phase change materials, and has broad application prospects in the field of phase change material filling.

[0042] Please refer to Figure 1 and Figure 2 , is a structural schematic diagram of a phase change material filling device 100 provided in an embodiment of the present application, the phase change material filling device 100 comprises a melt drive unit 1 and a filling unit 2 which are interconnected; the melt drive unit 1 comprises a first box body 11, the outer surface of the first box body 11 is provided with a first heat preservation layer 111, the inner surface is provided with a first heating layer 112, the interior is provided with a storage tank 12, a first discharge pipe 13, a screw propulsion assembly 14 and a second discharge pipe 15 which are connected in sequence, and the feed inlet end of the screw propulsion assembly 14 is provided with a motor 16; The filling unit 2 includes a second box body 21, a second heat preservation layer 211 is provided on the outer surface of the second box body 21, and a second heating layer 212 is provided on the inner surface. The discharge port end of the second discharge pipe 15 extends into the second box body 21, and a metal hose 22 and a workpiece 3 to be filled are provided in the second box body 21. One end of the metal hose 22 is connected to the second discharge pipe 15, and the other end is connected to the workpiece 3 to be filled. The flow rate required for filling the phase change material of the workpiece 3 to be filled is adapted to the rotation speed of the motor 16 and the conveying speed of the liquid phase change material conveyed by the screw propulsion assembly 14. Among them, the first discharge pipe 13 and the second discharge pipe 15 are both metal pipes. The metal hose 22 is threadedly connected to the second discharge pipe 15. The outer wall of the storage tank 12 is connected to the inner wall of the first box body 11 to fix the storage tank 12. The outer surface of the screw propulsion assembly 14 is connected to the inner wall of the first box body 11 to fix the screw propulsion assembly 14. Alternatively, a metal frame is provided inside the first box body 11 , the material storage tank 12 and the screw propulsion assembly 14 are connected via the metal frame, and the metal frame is fixedly connected to the inside of the first box body 11 .

[0043] The heating function of the box body is realized by assembling the first heating layer 112 on the inner surface of the first box body 11. The first heating layer 112 can be a heating plate, a heating film or a heating pipe network and other components that can realize the heating function. The heating power of the heating plate and the heating film and the network density of the heating pipe network are set according to the melting point of the solid phase change material to ensure that the solid phase change material can be melted. By coating the first thermal insulation layer 111 on the outer surface of the first box body 11, the continuous thermal insulation of the first box body 11 is ensured. That is, the heating and thermal insulation functions of the first box body 11 are realized by the setting of the first heating layer 112 and the first thermal insulation layer 111. When the solid phase change material is added to the storage tank 12, the solid phase change material is heated and liquefied by the first heating layer 112 and the first thermal insulation layer 111, and the liquid state is continuously maintained. The material of the first thermal insulation layer 111 is rock wool.

[0044] The first discharge pipe 13 and the second discharge pipe 15 are both metal pipes, which have good thermal conductivity, so that the interior of the first discharge pipe 13 and the second discharge pipe 15 is still in a high temperature state, preventing the liquid phase change material from re-solidifying during the transportation process.

[0045] The heating function of the box body is realized by assembling a second heating layer 212 on the inner surface of the second box body 21. The second heating layer 212 can be a component that can realize the heating function, such as a heating plate, a heating film, or a heating pipe network. The heating power of the heating plate and the heating film and the network density of the heating pipe network are set according to the melting point of the solid phase change material to ensure that the solid phase change material can be melted. By coating the second insulation layer 211 on the outer surface of the second box body 21, the continuous insulation of the second box body 21 is ensured. That is, by setting the second heating layer 212 and the second insulation layer 211, the heating and insulation functions of the second box body 21 are realized, and the liquid phase change material is further prevented from re-solidifying during the transportation process. The material of the second insulation layer 211 is rock wool.

[0046] The metal hose 22 can not only conduct heat quickly to prevent the liquid phase change material from re-solidifying, but also avoids the hard connection between the second discharge pipe 15 and the workpiece 3 to be filled, and increases the spatial tolerance between the workpiece 3 to be filled and the second discharge pipe 15 (that is, the metal hose 22 has good bending performance, is easy to stack, and occupies less space, which can provide a larger space for the workpiece 3 to be filled and accommodate workpieces 3 to be filled of different sizes). Furthermore, the metal hose 22 can improve the degree of freedom of the interface of the workpiece 3 to be filled and improve the assembly performance with the workpiece 3 to be filled.

[0047] The motor 16 drives the screw propulsion assembly 14 to work, and pumps the liquid phase change material flowing out of the first discharge pipe 13 into the second discharge pipe 15, thereby achieving the filling of the liquid phase change material in the workpiece 3 to be filled. The speed of the motor 16 is adjusted according to the size of the feed port of the workpiece 3 to be filled and the size of the internal cavity of the workpiece 3 to be filled, and the flow rate required for filling the workpiece 3 with the liquid phase change material is controlled to match the speed of the motor 16 and the conveying speed of the screw propulsion assembly 14 to convey the liquid phase change material, so that the flow rate of the liquid phase change material at the feed port end of the workpiece 3 to be filled is autonomously controllable. That is, under the condition that the liquid phase change material does not overflow, the volume of the liquid phase change material transported by the screw propulsion assembly 14 per unit time is equal to the required flow rate of the liquid phase change material flowing through the cross section of the feed port of the workpiece 3 to be filled per unit time, and the screw propulsion assembly 14 is driven by the motor 16 to work, so that the feed port end of the workpiece 3 to be filled delivers the liquid phase change material at the target flow rate (i.e. the required flow rate), thereby realizing the rapid filling of the workpiece 3 to be filled. At the same time, according to the volume of the workpiece 3 to be filled or the volume to be filled and the conveying speed of the screw propulsion assembly 14, the volume of the liquid phase change material filled in the workpiece 3 to be filled can be determined, and then the filling degree in the workpiece 3 to be filled can be determined, thereby realizing the quantitative filling of the workpiece 3 to be filled. In some embodiments, the target flow rate or the required flow rate is the maximum flow rate that the feed port end of the workpiece 3 to be filled can bear. At this time, the maximum flow rate of the liquid phase change material filled in the workpiece 3 to be filled is adapted to the rotation speed of the motor 16 and the conveying speed of the liquid phase change material conveyed by the screw propulsion assembly 14. Normally, the workpiece 3 to be filled is filled with porous materials. The maximum flow rate that the workpiece 3 to be filled can withstand depends on the density of the porous material inside it. If the porous material is relatively dense, the flow rate is relatively low. If the porous material has large pores or is not filled with porous material, the flow rate is relatively high.

[0048] Further, in the embodiments of the present application, Figure 3 As shown, the screw propulsion assembly 14 includes a rotating screw 141 and a shell 142 sleeved on the rotating screw. The outer side of the rotating screw 141 along the axial direction contacts the inner wall of the shell 142. The shape of the inner side of the shell 142 is consistent with that of the rotating screw 141, and the outer side is a smooth cylinder. The discharge port end of the first discharge pipe 13 is connected to the end of the shell 142 close to the motor 16, and the rotating screw 141 is connected to the output shaft of the motor 16; the rotation speed of the rotating screw 141 depends on the flow rate required for filling the liquid phase change material of the workpiece 3 to be filled, that is, the target flow rate. By controlling the rotation speed and number of rotations of the motor 16, the rotation speed and number of rotations of the rotating screw 141 are controlled, and then the transportation volume and transportation rate of the phase change material conveyed by the screw propulsion assembly 14 are controlled, so that the flow rate of the liquid phase change material at the feed port end of the workpiece 3 to be filled is at the target flow rate, and the workpiece 3 to be filled is quickly and quantitatively filled.

[0049] Further, in the embodiments of the present application, Figure 1 and Figure 2 As shown, the phase change material filling device 100 also includes an automatic control unit 4; the automatic control unit 4 includes a control panel 45, a first solenoid valve 41 arranged on the first discharge pipe 13, and a second solenoid valve 42 arranged on the second discharge pipe 15; the first solenoid valve 41, the second solenoid valve 42 and the motor 16 are electrically connected to the control panel 45 (i.e. connected by wires). Specifically, the control panel 45 is provided with a parameter setting key for the first solenoid valve 41, a parameter setting key for the second solenoid valve 42, and a speed setting key, a number of rotations, and a working time setting key for the motor 16. In order to adapt to the speed of the motor 16, when the motor 16 is at the maximum speed or the required maximum speed, the diameter of the first discharge pipe 13 is sufficient to provide the liquid phase change material to the screw propulsion assembly 14 without interruption, and at the same time, the diameters of the second discharge pipe 15 and the metal hose 22 are sufficient to transport the liquid phase change material delivered by the screw propulsion assembly 14 without overflowing. By setting the control panel 45, the first solenoid valve 41 and the second solenoid valve 42, according to the target flow rate of the liquid phase change material at the feed port end of the workpiece 3 to be filled, the control panel 45 can adjust the speed of the motor 16 on the one hand, so that it is adapted to the target flow rate of the liquid phase change material at the feed port end of the workpiece 3 to be filled, and on the other hand, the control panel 45 can adjust the opening angle of the first solenoid valve 41 and the second solenoid valve 42, so that the flow rate of the liquid phase change material in the first discharge pipe 13, the second discharge pipe 15 and the metal hose 22 is equal to the target flow rate of the liquid phase change material at the feed port end of the workpiece 3 to be filled. That is, through the dual coordination of the flow rate of the motor 16 and the pipeline (referring to the first discharge pipe 13, the second discharge pipe 15 and the metal hose 22), the workpiece 3 to be filled can be quickly and quantitatively filled without overflow of the liquid phase change material. In addition, by controlling the opening angles of the first solenoid valve 41 and the second solenoid valve 42, the liquid phase change material in the first discharge pipe 13 and the second discharge pipe 15 is more concentrated during the transportation process, further improving the thermal insulation performance and preventing it from solidifying.

[0050] Further, in the embodiments of the present application, Figure 1 As shown, the motor 16 is arranged outside the first box body 11. A circular hole is opened on the first box body 11, and a bearing is used in the circular hole to support the power output rod of the motor 16 (i.e., the output shaft of the motor 16), and a high-temperature resistant rubber sheet is attached around the circular hole on the outside of the first box body 11. The motor 16 is arranged outside the first box body 11, which can prevent the motor 16 from failing due to the high temperature inside the first box body 11 and extend the service life of the motor 16. In addition to the motor 16, the storage tank 12, the first discharge pipe 13, the screw propulsion group 14 and the second discharge pipe 15 are all located inside the first box body 11, which ensures that the liquid phase change material is always in a high temperature state during the transportation process to the greatest extent, and prevents blockage caused by the re-solidification of the liquid phase change material during the filling process.

[0051] Further, in the embodiments of the present application, Figure 1 and Figure 2 As shown, a liquid level gauge 121 and an armored thermocouple 122 are provided on the side wall of the storage tank 12, and the liquid level gauge 121 and the armored thermocouple 122 are electrically connected to the control panel 45 respectively. The liquid level gauge 121 is used to monitor the remaining amount of the liquid phase change material in the storage tank 12 in real time, and feed it back to the control panel 45. The number and position of the armored thermocouple 122 are freely set according to the size and shape of the storage tank 12. The armored thermocouple 122 is set at multiple characteristic points of the storage tank 12, which is used to monitor the temperature of the liquid phase change material in the storage tank 12 in real time, and feed it back to the control panel 45, so as to facilitate the staff to judge whether the liquid phase change material is solidified. Through the setting of the liquid level gauge 121 and the armored thermocouple 122, it is convenient for the staff to understand the various data of the liquid phase change material in the storage tank 12, and ensure that the remaining amount and temperature of the liquid phase change material are in a fillable state. Specifically, the shape of the storage tank 12 can be various shapes such as cylindrical, prism, funnel, etc. When the storage tank 12 is a cylinder or a prism, the number of the armored thermocouples 122 is three, and the three armored thermocouples 122 are respectively located at the top, middle and bottom of the cylinder or the prism in the height direction; when the storage tank 12 is Figure 1 In the funnel-shaped case shown, there are three armored thermocouples 122 , which are respectively located at the top, the bend, and the bottom of the funnel.

[0052] The control panel 45 is provided with a first temperature control key for adjusting the internal temperature of the first box 11 and a second temperature control key for adjusting the internal temperature of the second box 21. The first heating layer 112 and the second heating layer 212 are electrically connected to the first temperature control key and the second temperature control key respectively. When the armored thermocouple 122 detects that the temperature of the liquid phase change material in the storage tank 12 is about to be lower than the solidification point of the phase change material, the temperature is increased by the first temperature control key and the second temperature control key on the control panel 45, so that the first heating layer 112 and the second heating layer 212 are further heated to prevent the liquid phase change material from re-solidifying. Alternatively, the user can independently set the heating target temperature according to the melting point of different phase change materials, and the first box 11 will enter the insulation state after reaching the target temperature.

[0053] Further, in the embodiments of the present application, Figure 1 and Figure 2As shown, a discharge pipe 123 is provided at the lower end of the storage tank 12, and the automatic control unit 4 also includes a third solenoid valve 43 arranged on the discharge pipe 123, and the third solenoid valve 43 is electrically connected to the control panel 45. Specifically, a parameter setting key for the third solenoid valve 43 is provided on the control panel 45. After the filling of the workpiece 3 to be filled is completed, the third solenoid valve 43 can be controlled to open by the automatic control unit 4 to discharge the excess liquid phase change material from the discharge pipe 123. If the phase change material filling device 100 is used to fill the same liquid phase change material, there is no need to discharge the excess liquid phase change material from the discharge pipe 123 for continued use next time. Furthermore, in an embodiment of the present application, if Figure 1 and Figure 2 As shown, a cover plate 17 for opening or closing the storage tank 12 is provided at the feed port end of the storage tank 12. The cover plate 17 is opened to enable the storage tank 12 to be filled, and the cover plate 17 is closed to prevent the phase change material from splashing.

[0054] Further, in the embodiments of the present application, Figure 1 and Figure 2 As shown, the automatic control unit 4 also includes a vacuum pump 46 disposed outside the second box 21 and connected to the second box 21; the vacuum pump 46 is electrically connected to the control panel 45. Specifically, the vacuum pump 46 is connected to the second box 21 through a rubber hose 5, and a fourth solenoid valve 44 is provided on the rubber hose 5. The fourth solenoid valve 44 can be switched manually or through the control panel 45. The air inside the second box 21 and the workpiece 3 to be filled is fully extracted by the vacuum pump 46 to make them in a vacuum state. On the one hand, the workpiece 3 to be filled is in a negative pressure state. At the same time, with the help of the pressurization of the screw propulsion assembly 14, the filling degree and filling speed of the liquid phase change material in the workpiece 3 to be filled are improved under the dual effects of negative pressure and pressurization. On the other hand, the vacuum state of the second box 21 further improves the thermal insulation effect of the second box 21.

[0055] Further, in the embodiments of the present application, Figure 1 and Figure 2 As shown, a replaceable interface fitting 23 is provided between the metal hose 22 and the workpiece 3 to be filled. The interface fitting 23 is used to bridge the discharge port of the metal hose 22 and the feed port of the workpiece 3 to be filled. The interface fitting 23 is threadedly connected to the discharge port of the metal hose 22 and the feed port of the workpiece 3 to be filled. The size and model of the interface fitting 23 depend on the size of the feed port of the workpiece 3 to be filled. The interface fitting 23 can be selected according to the size of the feed port of the workpiece 3 to be filled. The interface fitting 23 is preferably a male and female connector. The filling of the workpiece 3 to be filled with different feed port sizes can be achieved through the replaceable interface fitting 23. The connection between the second discharge pipe 15 and the metal hose 22, the metal hose 22 and the interface fitting 23, the interface fitting 23 and the workpiece 3 to be filled, and the interface fitting 23 do not affect the flow rate of the liquid phase change material.

[0056] Further, in the embodiments of the present application, Figure 1 As shown, when the length of the metal hose 22 is small, less than one-fourth of the diagonal length of the second box body 21, a mobile platform 24 for carrying the workpiece 3 to be filled is provided in the second box body 21, a limit block 25 is provided above the mobile platform 24, and a lifting mechanism 26 is provided below. The mobile platform 24 includes a mobile layer and a bearing layer (not shown in the figure) arranged up and down, and the mobile layer and the bearing layer are slidably connected. Specifically, a slider is provided on the lower surface of the mobile layer, and a slide rail is provided on the upper surface of the bearing layer, so that the mobile layer can slide along the bearing layer, thereby driving the workpiece 3 to be filled on the mobile platform 24 to move horizontally. The lifting mechanism 26 controls the rise and fall of the mobile platform 24 in the vertical direction by telescoping, thereby controlling the up and down movement of the workpiece 3 to be filled. That is, the movement of the workpiece 3 to be filled is realized by the lifting mechanism 26 and the mobile platform 24, and the feed port of the workpiece 3 to be filled is moved to a position where it can be assembled with the metal hose 22. The limit block 25 is used to limit and fix the workpiece 3 to be filled, and prevent the relative sliding of the workpiece 3 to be filled during the movement process.

[0057] like Figure 2 As shown, when the length of the metal hose 22 is relatively long, greater than or equal to one quarter of the diagonal length of the second box body 21, a fixed platform 27 for carrying the workpiece 3 to be filled is provided in the second box body 21, and a limit block 25 is provided above the fixed platform 27. When filling is required, the metal hose 22 is directly pulled to the feed port of the workpiece 3 to be filled, and the metal hose 22 and the workpiece 3 to be filled are connected through the interface fitting 23. In this embodiment, the reduction of components in the second box body 21 and the simplification of functions greatly improve the reliability of the product, making the connection between the metal hose 22 and the workpiece 3 to be filled more convenient.

[0058] The metal hose 22 and the workpiece 3 to be filled are placed inside the second box 21 to prevent blockage caused by solidification of the phase change material during the filling process. When not in use, the metal hose 22 is hung on the side wall or top of the second box 21 through a hanging assembly.

[0059] In the present application, the surfaces of the wires disposed inside the first box 11 and the second box 21 are provided with a substantially non-heat-conductive insulation layer, and the material of the insulation layer is rock wool to prevent the wires from being damaged by high temperature. At the same time, the multiple wires in the first box 11 eventually pass through the same through hole to pass out of the first box 11, and the multiple wires in the second box 21 eventually pass through the same through hole to pass out of the second box 21, and sealant is provided at the through hole to ensure the sealing of the first box 11 and the second box 21, thereby ensuring its heating and heat preservation functions.

[0060] In order to prevent the solidification of the liquid phase change material during the filling process, the first box 11 and the second box 12 are stacked up and down, that is, the gap between the first box 11 and the second box 12 is very small, and the pipes through which the liquid phase change material flows are arranged inside the heating and insulation box as much as possible. Alternatively, the lower surface of the first box 11 and the upper surface of the second box 12 share a surface, in which case the second discharge pipe 15 is used through the cabin, and the flange and the sealing ring are used to seal the first box 11 side or the second box 12 side to prevent air leakage when the second box 12 is evacuated.

[0061] In a second aspect, the present application also provides a control method for a phase change material filling device, comprising the following steps:

[0062] S1. After placing the workpiece 3 to be filled at a suitable position according to the length of the selected metal hose 22, select a suitable interface accessory 23 according to the size of the feed port of the workpiece 3 to be filled, and connect the metal hose 22 and the workpiece 3 to be filled.

[0063] S2. Add the solid phase change material into the first box 11. According to the melting point of the solid phase change material, set the required temperature (slightly higher than the temperature of the phase change material) through the first temperature control key and the second temperature control key on the control panel 45, so that the first heating layer 112 and the second heating layer 212 work, heat and melt the solid phase change material in the storage tank 12, and judge the state of the phase change material in the storage tank 12 by the temperature feedback from the armored thermocouple 122. At the same time, the air inside the second box 21 and the workpiece 3 to be filled is fully extracted through the vacuum pump 46 to make them in a vacuum state.

[0064] S3. When the solid phase change material in the storage tank 12 is fully melted, first set the speed and number of revolutions of the motor 16, the opening angle of the first solenoid valve 41, and the opening angle of the second solenoid valve 42 through the control panel 45 according to the size of the feed port of the filling workpiece 3, so that the conveying rate of the liquid phase change material matches the internal volume of the workpiece 3 to be filled and the porosity of the internal filler. When the parameter setting is completed, turn on the switch of the motor 16, and the motor 16 drives the screw propulsion assembly 14 to work, so as to realize the rapid and quantitative filling of the workpiece 3 to be filled. After the filling is completed, whether the remaining liquid phase change material in the storage tank 12 needs to be discharged from the discharge pipe 123 depends on the actual situation.

[0065] The present application utilizes the above-mentioned phase change material filling device to achieve rapid and quantitative filling of the filling workpiece 3.

[0066] Please also read Figures 1 to 3According to one or more embodiments of the present application, the present application sets a heating layer inside the first box 11 and the second box 21 and sets an insulation layer on the outer surface, so that the solid phase change material is in a liquid fillable state in the melting drive unit 1 and the filling unit 2; on this basis, according to the size of the feed port of the workpiece 3 to be filled and the volume to be filled, the speed, number of revolutions and working time of the motor 16 are set to achieve rapid and quantitative filling of the workpiece 3 to be filled. At the same time, the setting of the metal hose 22 can not only avoid the hard connection between the second discharge pipe 15 and the workpiece 3 to be filled, increase the spatial tolerance between the workpiece 3 to be filled and the second discharge pipe 15, but also improve the degree of freedom of the interface of the workpiece 3 to be filled, and improve the assembly performance with the workpiece 3 to be filled.

[0067] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A phase change material filling device, characterized in that: It comprises a melting drive unit and a filling unit which are interconnected; the melting drive unit comprises a first box body, the outer surface of the first box body is provided with a first insulation layer, the inner surface is provided with a first heating layer, and the interior is provided with a storage tank, a first discharge pipe, a screw propulsion assembly and a second discharge pipe which are connected in sequence, and the feed port end of the screw propulsion assembly is provided with a motor; the filling unit comprises a second box body, the outer surface of the second box body is provided with a second insulation layer, the inner surface is provided with a second heating layer, the discharge port end of the second discharge pipe extends into the second box body, a metal hose and a workpiece to be filled are provided in the second box body, one end of the metal hose is connected to the second discharge pipe, and the other end is connected to the workpiece to be filled; the flow rate required for filling the workpiece to be filled with liquid phase change material is adapted to the rotation speed of the motor and the conveying speed of the liquid phase change material conveyed by the screw propulsion assembly.

2. The phase change material filling device according to claim 1, characterized in that: The screw propulsion assembly includes a rotating screw and a shell sleeved on the rotating screw, the discharge port end of the first discharge pipe is connected to one end of the shell close to the motor, and the rotating screw is connected to the output shaft of the motor; the rotation speed of the rotating screw depends on the flow rate required for filling the liquid phase change material into the workpiece to be filled.

3. The phase change material filling device according to claim 2, characterized in that: The phase change material filling device also includes an automatic control unit; the automatic control unit includes a control panel, a first solenoid valve arranged on the first discharge pipe, and a second solenoid valve arranged on the second discharge pipe; the first solenoid valve, the second solenoid valve and the motor are electrically connected to the control panel respectively.

4. The phase change material filling device according to claim 3, characterized in that: The motor is arranged outside the first box.

5. The phase change material filling device according to claim 1, characterized in that: A replaceable interface fitting is provided between the metal hose and the workpiece to be filled.

6. The phase change material filling device according to claim 4, characterized in that: A liquid level meter and an armored thermocouple are provided on the side wall of the storage tank, and the liquid level meter and the armored thermocouple are electrically connected to the control panel respectively.

7. The phase change material filling device according to claim 6, characterized in that: A discharge pipe is provided at the lower end of the storage tank, and the automatic control unit further comprises a third solenoid valve provided on the discharge pipe, and the third solenoid valve is electrically connected to the control panel.

8. The phase change material filling device according to claim 1, characterized in that: The automatic control unit also includes a vacuum pump disposed outside the second box and communicated with the second box; the vacuum pump is electrically connected to the control panel.

9. The phase change material filling device according to claim 1, characterized in that: When the length of the metal hose is less than one quarter of the diagonal length of the second box body, a mobile platform for carrying the workpiece to be filled, a limit block located on the mobile platform, and a lifting mechanism located under the mobile platform are provided in the second box body; the mobile platform includes a mobile layer and a bearing layer which are arranged up and down and slidably connected; When the length of the metal hose is greater than or equal to one quarter of the diagonal length of the second box body, a fixed platform for carrying the workpiece to be filled and a limit block located on the fixed platform are provided in the second box body.

10. A control method for a phase change material filling device according to any one of claims 1 to 9, characterized in that: The steps include: S1, connecting the workpiece to be filled with the metal hose; S2, adding a solid phase change material into the first box, and heating and melting the solid phase change material through the first heating layer and the first insulation layer; S3. Adjust the speed, number of revolutions and working time of the motor to adapt to the flow rate required for filling the liquid phase change material into the workpiece to be filled, so as to achieve rapid and quantitative filling of the workpiece.

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