Heat transfer device and heat transfer system

Abstract

The utility model belongs to the field of heat transfer processing technology, solves the problems of high energy consumption and poor hot stamping effect existing in the existing heat transfer device, and provides a heat transfer device and a heat transfer system. The heat transfer device includes: a box body with an opening and a heat-insulating inner cavity, a heating plate arranged in the heat-insulating inner cavity, a telescopic member that can be extended or retracted from the opening, and a support member connected to the telescopic member and moving with the telescopic member. When the telescopic member is relatively moved out to the outside, the support member receives and supports the material with the finished transfer medium stacked thereon; when the telescopic member is relatively moved into the heat-insulating inner cavity, at least one of the heating plate and the support member is relatively abutted or relatively moved away, and the heating plate and the finished transfer medium are abutted against each other so as to heat the heat transfer pattern onto the material. By moving away from each other, the telescopic member can be relatively moved out to the outside again for taking away the material that has been completed with hot stamping. The utility model heat transfer device and the heat transfer system have the advantages of reduced energy consumption and good hot stamping effect.

Description

Technical Field

[0001] The utility model relates to the technical field of heat transfer processing, in particular to a heat transfer device and a heat transfer system. Background Art

[0002] For an existing heat transfer system currently on the market, the desired pattern is first printed onto a transfer medium using ink, and then the hot melt powder is evenly sprinkled on the transfer medium using a matching powder shaking device, and then the hot melt powder adhered to the ink is melted and solidified on the transfer medium using a heating device, and then the transfer medium is stacked on materials such as clothes, and finally the materials are transported to a heat transfer device located at other workstations and having a heating plate, and the desired pattern is heat-stamped onto the material using the heat transfer device.

[0003] However, the existing heat transfer device is open to the outside world as a whole, so that heat can easily diffuse to the outside world, which not only causes high energy consumption due to energy waste, but also makes the hot stamping temperature unstable. In addition, it is necessary to manually place the material with the stacked transfer medium under the heating plate, and then manually abut the heating plate against the material. It is difficult to maintain precise abutment pressure, and it is inevitable that there will be operational errors that cause the material and the heating plate to be misaligned, resulting in the transfer medium The pattern with hot melt powder cannot be fully hot stamped. There is also a disadvantage of a significantly low degree of automation, all of which result in poor hot stamping effects.

[0004] Therefore, there is an urgent need to provide a heat transfer device and a heat transfer system with reduced energy consumption and good hot stamping effect. Utility Model Content

[0005] The utility model aims at the above-mentioned shortcomings of the prior art, such as high energy consumption and poor hot stamping effect. To achieve one purpose of the utility model, a heat transfer device is provided, comprising: a box body, which comprises an opening and a heat-insulating inner cavity; a heating plate arranged in the heat-insulating inner cavity; a telescopic member, which can be extended from the opening or retracted so as to be at least partially moved out or moved in relative to the heat-insulating inner cavity; a support member, which is connected to the telescopic member and moves with the telescopic member; when the telescopic member is relatively moved out to the outside, the support member receives and supports a material with a finished transfer medium stacked thereon, and the finished transfer medium has a heat transfer pattern adhered thereto by hot-melt powder; when the telescopic member is relatively moved into the heat-insulating inner cavity, the support member brings the material into the heat-insulating inner cavity, and at least one of the heating plate and the support member performs relative abutment or relative movement away from each other. By performing the relative abutment movement, the heating plate and the finished transfer medium abut against each other so as to heat the heat transfer pattern onto the material. By performing the relative movement away from each other, the telescopic member can be relatively moved out to the outside again for taking away the material that has been hot stamped.

[0006] Furthermore, the telescopic member includes a telescopic frame and a first hollow portion surrounded by the telescopic frame, the supporting member includes a supporting frame, a second hollow portion surrounded by the supporting frame and a supporting component fixed to the supporting frame, the supporting frame is arranged in the first hollow portion and connected to the telescopic frame, and the supporting component is located in the second hollow portion.

[0007] Furthermore, the heat printing device also includes a lifting mechanism, the heating plate is fixed to the top of the heat-insulating inner cavity, the lifting mechanism is located below the heating plate, and a plurality of elastic members are provided in the first hollow portion, and the two ends of the elastic members are respectively connected to the telescopic frame and the support frame, and through the upward movement of the lifting mechanism and overcoming the elastic deformation force of the elastic members, the support frame and / or the support component are lifted relative to the telescopic frame so that the finished transfer medium abuts against the heating plate to complete the hot stamping, and the lifting mechanism drives the support frame to move away from the heating plate by performing a downward movement, and through the downward movement of the lifting mechanism and with the aid of the elastic restoring force of the elastic members, the support frame is lowered so that the finished transfer medium is away from the heating plate and the support frame returns to a position relative to the opening.

[0008] Furthermore, the telescopic frame and the supporting frame are both set to be rectangular, and the corresponding frame edges of the telescopic frame and the supporting frame are parallel to each other and form frame edge pairs. When the supporting member is not affected by the lifting mechanism, the vertical spacing of each frame edge pair is equal.

[0009] Furthermore, a pair of elastic members is provided between each pair of frame edges, the telescopic frame and the supporting frame have a common center point, and a pair of elastic members are symmetrically arranged on both sides of two mutually perpendicular center lines passing through the common center point.

[0010] Furthermore, the heat printing device also includes a controller, the lifting mechanism includes a motor, a lifting rod, and a top support member, the top support member is fixed to the free end of the lifting rod facing the support member, and the controller controls the operation of the motor to drive the lifting rod to extend or shorten, so that the top support member acts on the support member to make it move in a direction of abutting against or away from the heating plate.

[0011] Furthermore, the elastic member is a spring, the top support member is made of high temperature resistant sponge, the support member is made of Teflon cloth, and the support frame is made of hard material.

[0012] Furthermore, a door for opening and closing is provided on the box body, a push-pull rod is fixed on the telescopic part, and a pair of guide grooves for sliding of the telescopic part are provided on the heat-insulating inner cavity. By operating the push-pull rod and the door, the telescopic part can be moved out to the outside along the guide groove after the door is opened, and the telescopic part can be moved into the heat-insulating inner cavity along the guide groove after the door is closed.

[0013] As an object of the present utility model, a heat transfer system is provided, comprising any of the above heat transfer devices.

[0014] Furthermore, the heat transfer system also includes: a conveying device for conveying a transfer medium; a printing device, a powder shaking device and a powder supplying device arranged in sequence along the conveying direction of the transfer medium conveyed by the conveying device, the first side of the transfer medium receives the inkjet of the printing device to obtain a heat transfer pattern, the transfer medium passes through the two sides of the powder supplying device in a relatively reverse movement manner, the powder supplying device supplies hot melt powder to the first side so that the heat transfer pattern adheres to the hot melt powder, the powder shaking device supports and shakes the second side of the transfer medium opposite to the first side, so that excess hot melt powder on the area of ​​the first side except the heat transfer pattern is shaken off; a heat preservation device, which and the heat transfer device are arranged downstream of the powder shaking device and the powder supplying device in the conveying direction, the heat preservation device and the heat transfer device have a spacing space in the vertical direction to heat the second side and the first side of the transfer medium passing through the spacing space respectively, the heat transfer pattern and the hot melt powder are both heated so that the hot melt powder on the above-mentioned heat transfer pattern is melted and dried.

[0015] The beneficial effects of the utility model are:

[0016] The utility model heat transfer device and heat transfer system adopt a box body with a heat-insulating inner cavity forming a relatively closed heating space, so that heat is not easily diffused to the outside, thereby preventing energy waste, and at least one of the heating plate and the support member performs relative abutment movement and relative separation movement, which not only has a high degree of automation, but also can ensure that abutment and heating are achieved with precise pressure, thereby obtaining excellent hot stamping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for use in the embodiment of the utility model will be briefly introduced below. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work, and these are all within the protection scope of the utility model.

[0018] Figure 1 It is a partial cross-sectional view of an embodiment of the heat transfer device of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the embodiment of the heat transfer device of the utility model, which mainly shows the telescopic member and the supporting member;

[0020] Figure 3 This is a schematic diagram of the internal structure of the heat transfer device embodiment of the utility model corresponding to the state where the heating plate and the material are in contact;

[0021] Figure 4 It is a structural schematic diagram of an embodiment of the heat transfer system of the utility model;

[0022] Description of reference numerals:

[0023] 1-hot stamping device; 11-box; 111-opening; 112-insulating inner cavity; 12-heating plate; 13-telescopic frame; 14-support frame; 15-support component; 16-first hollow part; 17-lifting mechanism; 171-lifting rod; 172-top support member; 18-elastic member; 19-push-pull rod; 2-conveying device; 3-printing device; 4-powder shaking device; 5-powder supply device; 6-insulating device; 10-material. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the utility model. Moreover, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element limited by the sentence "includes..." does not exclude the presence of other identical elements in the process, method, article or device including the element. If there is no conflict, the embodiments of the utility model and the various features in the embodiments can be combined with each other, all within the scope of protection of the utility model.

[0025] Please refer to Figures 1 to 3As an object of the utility model, a heat transfer device 1 is provided, comprising a box 11, a heating plate 12, a telescopic member, and a support member. The box 11 comprises an opening 111 facing the outside world and a heat-insulating inner cavity 112. The size of the opening 111 only needs to allow the telescopic member and the material placed thereon to freely enter and exit relative to the box 11, so as to reduce the diffusion of heat from the opening 111 as much as possible. The heating plate 12 is arranged in the heat-insulating inner cavity 112. The telescopic member can extend or retract from the opening 111 so as to be at least partially moved out or moved in relative to the heat-insulating inner cavity 112. The support member is connected to the telescopic member and moves with the telescopic member. When the telescopic member is relatively moved out to the outside world, the support member receives and supports a material 10 such as clothes on which a finished transfer medium is stacked. The finished transfer medium has a heat transfer pattern adhered thereto by hot melt powder. More specifically, the finished transfer medium, such as a transfer medium of a PET film, is obtained by inkjet printing to obtain a heat transfer pattern and hot melt powder is adhered to the heat transfer pattern. When the telescopic member is relatively moved into the heat-insulating inner cavity 112, the support member brings the material 10 into the heat-insulating inner cavity 112, and at least one of the heating plate 12 and the support member makes relative abutment or relative movement away from each other. That is to say, the heating plate 12 can be connected to a driving member such as a piston rod of a cylinder to make it abut against a relatively stationary support member, or the support member can be configured to be driven by, for example, a lifting mechanism (to be further described below) to abut against the relatively stationary heating plate 12, or the support member can be configured to be driven by, for example, a lifting mechanism (to be further described below), and at the same time, the heating plate 12 can be configured to be driven by a driving member, so that the two move simultaneously toward or away from each other. Considering the cost and heating effect, the utility model adopts a method in which the support member is driven to move and the heating plate 12 is fixed to achieve the relative abutment and relative movement away from each other. By performing relative abutting motion, the heating plate 12 and the finished transfer medium abut against each other, thereby stamping the heat transfer pattern onto the material 10. It should be noted that, before the heat transfer pattern is stamped onto the material 10, preferably, the hot melt powder adhered to the heat transfer pattern has been melted and dried. On this basis, the heating plate 12 presses the finished transfer medium onto the material 10 at 150-160°C for 10 seconds, and then the finished transfer medium on the material 10 is peeled off from the material 10, thereby completing the hot stamping. By performing relative moving away motion, the telescopic member can be relatively moved out again to the outside to take away the material 10 that has been stamped. Therefore, since the heat-insulating inner cavity 112 of the box body 11 forms a relatively closed heating space, heat is not easily diffused to the outside, energy waste is prevented, and energy consumption is reduced. At least one of the heating plate 12 and the support member can be driven to complete relative abutment movement and relative separation movement therebetween. The driving method can be controlled by a controller with a preset program, for example, so that the degree of automation is high and the abutment pressure can be ensured to be accurate, thereby achieving a good hot stamping effect.

[0026] Please refer to Figure 2Specifically, the telescopic member includes a telescopic frame 13 and a first hollow portion 16 surrounded by the telescopic frame 13, and the support member includes a support frame 14, a second hollow portion surrounded by the support frame 14, and a support component 15 fixed to the support frame 14. The support frame 14 is arranged in the first hollow portion 16 and connected to the telescopic frame 13, and the support component 15 is located in the second hollow portion. In this way, the manufacture of the telescopic member and the support member is relatively simple and reliable, which not only reduces the cost, but also makes the push and pull of the telescopic member relative to the opening 111 stable, and the support frame 14 and the support component 15 have a strong support force on the finished transfer medium.

[0027] Please refer to Figure 3 Specifically, the heat printing device 1 also includes a lifting mechanism 17, the heating plate 12 is fixed to the top of the heat-insulating inner cavity 112, the lifting mechanism 17 is located below the heating plate 12, and a plurality of elastic members 18 are provided in the first hollow portion 16, the elastic members 18 are elastically and telescopically connected to the telescopic frame 13 and the support frame 14 through both ends respectively, through the upward movement of the lifting mechanism 17 and overcoming the elastic deformation force of the elastic members 18, the support frame 14 is lifted relative to the telescopic frame 14 so that the finished transfer medium abuts against the heating plate 12 to complete the hot stamping, because the material 10 has a certain thickness, its top surface will exceed the top surface of the support frame 14, and therefore, the heating plate 12 will not abut against the support frame 14, and in addition, even in the case of thin materials, the heating plate 12 can be further arranged so that its projection toward the support component 15 is located within the support component 15. The lifting mechanism 17 drives the support frame 14 to move away from the heating plate 12 by performing a downward movement. Through the downward movement of the lifting mechanism 17 and with the help of the elastic restoring force of the elastic member 18, the support frame 14 is lowered to move the finished transfer medium away from the heating plate 12 and return the support frame 14 to a position relative to the opening 111. Therefore, the telescopic frame 13 is elastically connected to the support frame 14 by using multiple elastic members 18, so that when the lifting mechanism 17 applies force to the support frame 14 and / or the support component 15, the support frame 14 and the support component 15 can provide elastic displacement relative to the support frame 14. By setting a preset distance for the movement of the lifting mechanism 17, it can be ensured that the material 10 and the heating plate 12 abut against each other with precise pressure, and even a pressure detector can be set at the free end of the lifting mechanism 17 moving toward the heating plate 12, so that the pressure exerted on the material from the heating plate can be detected in real time, so as to adjust the movement distance to ensure the accuracy of the pressure. Moreover, the area of ​​the support component 15 is constant, so that all the heat transfer patterns on the material 10 supported by it can be ensured to be heat transferred. Moreover, the lifting mechanism 17 can be controlled by the controller, so that the heat transfer device 1 has a high degree of automation, thereby significantly improving the heat transfer effect.

[0028] Please refer to Figure 2Preferably, the telescopic frame 13 and the support frame 14 are both set to be rectangular. Accordingly, the corresponding frame edges of the telescopic frame 13 and the telescopic frame 13 are parallel to each other and form a frame edge pair. It can be seen that each frame edge is also a rectangular edge. When at least one of the support member, that is, the support frame 14 and the support member 15 is not affected by the lifting mechanism 17, the vertical spacing of each frame edge pair is equal. In this case, the support frame 14 is located at the center of the first hollow part 16, so that the material 10 on the support member 15 is evenly heated by the heating plate 12.

[0029] Please refer to Figure 2 Preferably, a pair of elastic members 18 are provided between each pair of frame edges, the telescopic frames 13 and the telescopic frames 13 have a common center point, and a pair of elastic members 18 are symmetrically arranged on both sides of two mutually perpendicular center lines passing through the common center point. In this way, when the support member is moved by the lifting mechanism 17, the elastic deformation of each pair of elastic members 18 in the relative central area between each pair of frame edges is equal, so that the movement of the support member is stable without deflection and tilt, ensuring that the material 10 and the heating plate 12 are in close contact with each other.

[0030] Please refer to Figure 1 Specifically, the heat transfer device 1 further includes a controller, and the lifting mechanism 17 includes a motor (not shown), a lifting rod 171, and a top support 172. The top support 172 is preferably also a rectangular shape with an area smaller than the support member 15. The top support 172 is fixed to the free end of the lifting rod 171 facing the support member. The controller controls the operation of the motor to drive the lifting rod 171 to extend or shorten, so that the top support 172 acts on the support member to move it toward or away from the heating plate 12. Therefore, the extension or shortening distance of the lifting rod 171 is preset, and the force applied by the top support 172 is uniform, ensuring that the pressure of the material 10 abutting against the heating plate 12 is accurate.

[0031] Specifically, the elastic member 18 is a spring, which has relatively lower cost, is easier to determine the required elastic deformation force and the specific value of the elastic deformation force, and is convenient for assembly. The top support member 172 is made of high temperature resistant sponge, so that the top support member 172 can withstand the high temperature from the heating plate 12. The support component 15 is made of Teflon cloth, which has high temperature resistance. Therefore, the support component 15 has high temperature resistance. The support frame 14 is made of hard material, which can make the support frame 14 have great strength.

[0032] Please refer to Figure 3Preferably, a door (not shown) for opening and closing the opening 111 is provided on the box body 11, which can further increase the sealing performance of the box body 11 and prevent the loss of heat. A push-pull rod 19 is fixed on the telescopic member, and a pair of guide grooves (not shown) for the telescopic member to slide are provided on the heat-insulating inner cavity 112. By operating the push-pull rod 19 and the door, the telescopic member can be moved out to the outside along the guide groove after the door is opened, and the telescopic member can be moved into the heat-insulating inner cavity 112 along the guide groove after the door is closed. With the reliable guidance of the guide groove and the easy operation of the push-pull rod 19, the telescopic member moves smoothly and reliably in the box body 11.

[0033] As another object of the present invention, a heat transfer system is provided, which includes any one of the above heat transfer devices 1. The heat transfer system has the beneficial technical effects brought by any one of the above heat transfer devices 1, which will not be elaborated here. Therefore, the heat transfer system has the advantages of reduced energy consumption and good hot stamping effect.

[0034] Please refer to Figure 4 Preferably, the heat transfer system further comprises a conveying device 2, a printing device 3, a powder shaking device 4, a powder supply device 5 and a heat preservation device 6. The conveying device 2 is used to convey the transfer medium. The printing device 3, the powder shaking device 4 and the powder supply device 5 are arranged in sequence along the conveying direction of the transfer medium conveyed by the conveying device 2. The first side of the transfer medium receives the inkjet of the printing device 3 to obtain a heat transfer pattern. The transfer medium passes through the two sides of the powder supply device 5 in a relatively reverse moving manner. The powder supply device 5 supplies hot melt powder to the first side so that the heat transfer pattern adheres to the hot melt powder. The powder shaking device 4 supports and shakes the second side of the transfer medium opposite to the first side, so that the excess hot melt powder on the area other than the heat transfer pattern on the first side is shaken off. Preferably, the powder shaking device 4 has a pair of shaking rollers that move synchronously upward or downward. Figure 4The solid line and the dotted line in the figure respectively show the highest position and the lowest position of the pair of shaking rollers, so that the powder shaking device 4 can shake off the excess hot melt powder in the U-shaped portion of the transfer medium below the powder supply device 5. It can be seen that when the pair of shaking rollers are at the highest position, the powder supply mechanism is located above the U-shaped portion at intervals, so the up and down movement of the pair of shaking rollers will not interfere with the U-shaped portion, thereby ensuring the reliable operation of the heat transfer system. The heat preservation device 6 and the heat transfer device 1 are arranged downstream of the powder shaking device 4 and the powder supply device 5 in the conveying direction. The heat preservation device 6 and the heat transfer device 1 have a spacing space in the vertical direction to heat the second side and the first side of the transfer medium passing through the spacing space respectively. Specifically, the heat preservation device 6 can use a plurality of heating lamps to heat the second side, and the heat transfer device 1 uses the top surface of the box 11 to heat the first side. The heat transfer pattern and the hot melt powder are both heated so that the hot melt powder on the above heat transfer pattern is melted and dried. Therefore, the heat inevitably released by the box 11 of the heat press device 1 can be fully utilized to heat the transfer medium, saving energy. Moreover, the heat press device 1, the powder shaking device 4 and the heat preservation device 6 are arranged relatively close to each other, thereby further optimizing the structural layout and reducing the space occupied, making the heat press system have the advantage of a compact overall structure.

[0035] Finally, it should be understood that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A heat transfer device, characterized in that: include: A box body, comprising an opening and a heat-insulating inner cavity; A heating plate arranged in the heat-insulating inner cavity; A telescopic member, which can be extended or retracted from the opening so as to be at least partially moved out or in relative to the heat-insulating inner cavity; A supporting member connected to the telescopic member and moving with the telescopic member; When the telescopic member is relatively moved out to the outside, the support member receives and supports the material on which the finished transfer medium is stacked, and the finished transfer medium has a heat transfer pattern on which hot-melt powder is adhered; When the telescopic member is relatively moved into the heat-insulating inner cavity, the support member brings the material into the heat-insulating inner cavity, and at least one of the heating plate and the support member makes relative abutment or relative movement away from each other. By making relative abutment movement, the heating plate and the finished transfer medium make mutual abutment, thereby stamping the heat transfer pattern onto the material. By making relative movement away from each other, the telescopic member can be relatively moved out to the outside again for taking away the material that has been stamped.

2. The heat transfer device according to claim 1, characterized in that: The telescopic member includes a telescopic frame and a first hollow portion surrounded by the telescopic frame, the supporting member includes a supporting frame, a second hollow portion surrounded by the supporting frame and a supporting component fixed to the supporting frame, the supporting frame is arranged in the first hollow portion and connected to the telescopic frame, and the supporting component is located in the second hollow portion.

3. The heat transfer device according to claim 2, characterized in that: The heat printing device also includes a lifting mechanism, the heating plate is fixed to the top of the heat-insulating inner cavity, the lifting mechanism is located below the heating plate, a plurality of elastic members are provided in the first hollow portion, the two ends of the elastic members are respectively connected to the telescopic frame and the support frame, through the ascending movement of the lifting mechanism and overcoming the elastic deformation force of the elastic members, the support frame and / or the support component are lifted relative to the telescopic frame so that the finished transfer medium abuts against the heating plate to complete the hot stamping, the lifting mechanism drives the support frame to move away from the heating plate by performing a descending movement, through the descending movement of the lifting mechanism and with the aid of the elastic restoring force of the elastic members, the support frame is lowered so that the finished transfer medium is away from the heating plate and the support frame returns to a position relative to the opening.

4. The heat transfer device according to claim 3, characterized in that: The telescopic frame and the supporting frame are both configured as rectangles, and the corresponding frame edges of the telescopic frame and the supporting frame are parallel to each other and form frame edge pairs. When the supporting member is not acted upon by the lifting mechanism, the vertical spacings of the frame edge pairs are equal.

5. The heat transfer device according to claim 4, characterized in that: A pair of the elastic members is disposed between each pair of frame edges, the telescopic frame and the supporting frame have a common center point, and a pair of the elastic members are symmetrically arranged on both sides of two mutually perpendicular center lines passing through the common center point.

6. The heat transfer device according to claim 3, characterized in that: The heat transfer device also includes a controller, and the lifting mechanism includes a motor, a lifting rod, and a top support member, wherein the top support member is fixed to the free end of the lifting rod facing the support member, and the controller controls the operation of the motor to drive the lifting rod to extend or shorten, so that the top support member acts on the support member to make it move in a direction of contacting with or away from the heating plate.

7. The heat transfer device according to claim 6, characterized in that: The elastic member is a spring, the top support member is made of high temperature resistant sponge, the support member is made of Teflon cloth, and the support frame is made of hard material.

8. The heat transfer device according to claim 1, characterized in that: A door for opening and closing the opening is provided on the box body, a push-pull rod is fixed on the telescopic part, and a pair of guide grooves for the telescopic part to slide are provided on the heat-insulating inner cavity. By operating the push-pull rod and the door, the telescopic part can be moved out to the outside along the guide groove after the door is opened, and the telescopic part can be moved into the heat-insulating inner cavity along the guide groove after the door is closed.

9. A heat transfer system, characterized in that: The invention comprises a heat transfer device as claimed in any one of claims 1 to 8.

10. The heat transfer system according to claim 9, characterized in that: The heat transfer system also includes: A conveying device, used for conveying a transfer medium; A printing device, a powder shaking device and a powder supply device are sequentially arranged along the conveying direction of the transfer medium conveyed by the conveying device, the first side of the transfer medium receives the ink jet of the printing device to obtain a heat transfer pattern, the transfer medium passes through the two sides of the powder supply device in a relatively reverse moving manner, the powder supply device supplies hot melt powder to the first side so that the heat transfer pattern adheres to the hot melt powder, and the powder shaking device supports and shakes the second side of the transfer medium opposite to the first side, so that the excess hot melt powder on the area other than the heat transfer pattern on the first side is shaken off; The heat preservation device and the heat transfer device are arranged downstream of the powder shaking device and the powder supply device in the conveying direction. The heat preservation device and the heat transfer device have a spacing space in the vertical direction to respectively heat the second side and the first side of the transfer medium passing through the spacing space. The heat transfer pattern and the hot melt powder are both heated so that the hot melt powder on the above-mentioned heat transfer pattern is melted and dried.

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