Hot melt adhesive binding machine

Abstract

The utility model provides a hot melt adhesive binding machine. The hot melt adhesive binding machine comprises a shell, a clamping assembly, a heating assembly, a temperature measuring assembly and a moving assembly, the shell is of a box-type structure formed by connecting a top plate, a bottom plate, a front plate, a rear plate, a right side plate and a left side plate, and an installation space is formed in the shell. The heating assembly is arranged at the bottom of the mounting space, supporting plates are arranged on a front plate and a rear plate in the mounting space respectively, moving assemblies are arranged on the two supporting plates respectively, clamping assemblies are connected to the two moving assemblies respectively, and the clamping assemblies are located above the heating assembly and can move front and back along with the moving assemblies; the temperature measuring assembly is arranged in the installation space and can measure the temperature of the heating assembly. According to the hot melt adhesive binding machine, the clamping force is adjusted through the adjusting screw, and the temperature measuring assembly is independently arranged, so that the environment temperature is prevented from influencing the measuring result, and the measuring precision is improved.

Description

Technical Field

[0001] The utility model relates to the field of glue binding machines, in particular to a hot-melt glue binding machine. Background Art

[0002] A hot-melt binder is an office device used for binding documents. During use, the envelope is first folded along the creases, and the hot-melt adhesive strip is pasted to the inside of the envelope at the position corresponding to the spine. The documents and materials to be bound (such as documents, bills, etc.) are neatly arranged and placed in the envelope, and then the spine is placed face down in the hot-melt binder for binding. The hot-melt adhesive strip is melted by heating, so that the documents and materials are stuck to the envelope to complete the binding.

[0003] However, this type of hot melt adhesive binding machine has the following defects: first, during the hot melt process, there is no tightening device for binding documents, resulting in loose adhesion of documents and affecting the binding effect. Second, there is a lack of real-time monitoring of the hot melt temperature, and the hot melt temperature cannot be accurately controlled.

[0004] On this basis, those skilled in the art have conducted a lot of research and improvement. Chinese patent CN209552747U proposes a hot melt glue binding machine, which includes a housing, a hot melt chamber is fixedly provided inside the housing, a heating plate is fixedly provided inside the hot melt chamber, both ends of the heating plate are fixedly connected to a fixing frame, the bottom end of the fixing frame is fixedly connected to a No. 1 automatic telescopic rod, both side walls of the hot melt chamber are fixedly connected to a support plate, the top of the support plate is fixedly connected to a No. 2 automatic telescopic rod, one end of the No. 2 automatic telescopic rod is fixedly connected to a clamp, a placement slot is fixedly provided on the top of the hot melt chamber, and a fan is fixedly connected to the bottom end of the support plate. However, the above glue binding machine still has certain defects. First, the two clamps are driven by the automatic telescopic rod to rigidly clamp the bound documents. In the absence of precise control of the degree of compression of the two automatic telescopic rods, manual control alone is likely to cause the two clamps to be over-compressed, resulting in damage to the hot melt machine. Second, although a temperature sensor is provided in the above patent, the temperature sensor is provided at the bottom of the hot melt chamber, and the temperature measurement is not accurate.

[0005] In summary, it can be seen that there is an urgent need to provide a hot melt adhesive installation machine that can accurately measure the hot melt temperature, has a simple structure and a long service life. Utility Model Content

[0006] In view of this, the utility model provides a hot melt adhesive packaging machine to solve the defects of the prior art.

[0007] In a first aspect, the utility model provides a hot melt adhesive packaging machine, the hot melt adhesive packaging machine comprising: a housing, a clamping component, a heating component, a temperature measuring component and a moving component;

[0008] The housing is a box-type structure formed by interconnecting a top plate, a bottom plate, a front plate, a rear plate, a right plate and a left plate, and an installation space is formed inside the box-type structure;

[0009] The heating component is arranged at the bottom of the installation space, and support plates are respectively arranged on the front plate and the rear plate in the installation space, and moving components are respectively arranged on the two support plates, and clamping components are respectively connected to the two moving components, and the clamping components are located above the heating component and can move forward and backward with the moving component;

[0010] The temperature measuring component is arranged in the installation space and can measure the temperature of the heating component.

[0011] In a possible implementation, the heating assembly includes a heating plate and a heat conducting plate;

[0012] The heating plate is installed on the bottom plate, the heat conducting plate is arranged on the upper side of the heating plate and is in contact with the heating plate, and a heat conducting strip extends from the side of the heat conducting plate.

[0013] In a possible implementation, the temperature measurement assembly includes a temperature measurement chamber, a bracket, and a temperature sensor;

[0014] The temperature measurement chamber is arranged at a position close to the rear plate in the installation space, the bracket is arranged in the temperature measurement chamber, and the temperature sensor is arranged on the bracket; a through hole is arranged on a side wall of the temperature measurement chamber, the heat conductive strip passes through the through hole and extends into the temperature measurement chamber to contact the probe of the temperature sensor, and a sensor cooling fan is arranged on the rear plate for cooling the temperature measurement chamber.

[0015] In a possible implementation, the moving assembly includes a spring device, a moving plate, an adjusting nut and a rotating bearing;

[0016] The movable plate slides between the top plate and the support plate in a direction close to or away from the rear plate / front plate in a posture parallel to the rear plate; one end of the spring device is connected to the side of the movable plate away from the rear plate / front plate, and the other end of the spring device is connected to the clamping assembly;

[0017] The rear plate and the front plate are respectively provided with adjusting screw holes at the central positions. The adjusting nut passes through the adjusting screw holes and the end is connected to the side of the movable plate close to the rear plate / front plate through a rotating bearing; the adjusting nut and the adjusting screw hole are connected by threaded rotation.

[0018] In a possible implementation, guide bars are respectively provided on the top and bottom of the movable plate, a second guide groove is provided at a position corresponding to the guide bar on the top surface of the support plate, and a third guide groove is provided at a position corresponding to the guide bar on the bottom of the top plate, and the movable plate moves along the second guide groove and the third guide groove through the guide bar.

[0019] In one possible implementation, the clamping assembly includes a clamping plate, the bottom of which is located in the installation space, the top of which extends from the top plate to the outside of the outer shell, the other end of the spring device is fixedly connected to the side of the bottom of the clamping plate facing the rear plate / front plate, and the top of the clamping plate is provided with an arc-shaped guide portion.

[0020] In one possible implementation, a shielding plate is vertically connected to the middle position of the clamping plate, a first guide bar is provided on the bottom surface of the shielding plate, and a corresponding first guide groove is provided on the top surface of the top plate. The shielding plate can slide back and forth on the top surface of the top plate along the first guide groove through the first guide bar.

[0021] In a possible implementation, an operation panel is provided on the front panel, and the operation panel is used to set the heating temperature. When the temperature sensor detects that the heat conduction plate reaches the set temperature, the heating component is stopped from heating; a sensor cooling fan is provided on the rear panel; a power interface, a switch and a first cooling fan are provided on the right side panel; and a second cooling fan is provided on the left side panel.

[0022] Compared with the prior art, the embodiments of the present invention achieve the following technical effects:

[0023] (1) The utility model clamps the binding documents by a spring-driven moving assembly, which ensures the binding effect and has a simple structure, thereby extending the service life of the hot melt adhesive binding machine.

[0024] (2) The utility model can adjust the clamping force by adjusting the screw to achieve precise adjustment.

[0025] (3) The utility model has uniquely designed the setting mode of the temperature sensor through the temperature measurement chamber, thereby avoiding the influence of the ambient temperature on the measurement result and ensuring the measurement accuracy of the temperature sensor. When the temperature sensor detects that the set temperature has been reached, the heating is stopped, thus realizing precise temperature control and automatic power-off. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 A front view of a hot melt adhesive installation machine provided by an embodiment of the utility model;

[0028] Figure 2A rear front view of a hot melt adhesive installation machine provided in an embodiment of the utility model;

[0029] Figure 3 A perspective schematic diagram of the installation state of a clamping assembly of a hot melt adhesive installation machine provided by an embodiment of the utility model;

[0030] Figure 4 A perspective side view of the installation state of a clamping assembly of a hot melt adhesive installation machine provided by an embodiment of the utility model;

[0031] Among them, 1-housing; 11-top plate; 111-first guide groove; 12-bottom plate; 13-front plate; 131-operation panel; 132-handle; 133-first adjustment screw hole; 14-rear plate; 141-second adjustment screw hole; 142-sensor cooling fan; 15-right side plate; 151-power interface; 152-switch; 153-first cooling fan; 16-left side plate; 161-second cooling fan; 162-inspection panel; 2-clamping assembly; 21-clamping plate; 22-shielding plate; 211-guiding part; 212-side guide bar; 221-first guide bar; 3-heating assembly; 31-heating plate; 32-heat conducting plate; 321-heat conducting bar; 41-temperature measuring chamber; 42-bracket; 43-temperature sensor; 5-moving assembly; 51-spring device; 52-moving plate; 53-support plate; 54-adjusting nut; 55-rotating bearing; 531-second guide groove. DETAILED DESCRIPTION

[0032] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0033] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0034] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0035] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0036] See also Figure 1-3 , Figure 1 This is a front view of a hot melt adhesive installation machine provided by an embodiment of the utility model. Figure 2 This is a rear view of a hot melt adhesive packaging machine provided by an embodiment of the utility model. Figure 3 This is a perspective schematic diagram of the installation state of a clamping assembly of a hot melt adhesive installation machine provided by the utility model. Figure 1-Figure 3 As shown, the utility model provides a hot melt adhesive packaging machine, including a housing 1, a clamping component 2, a heating component 3, a temperature measuring component and a moving component 5.

[0037] Combination Figures 1 to 3 The housing 1 is a box-type structure formed by interconnecting a top plate 11, a bottom plate 12, a front plate 13, a rear plate 14, a right side plate 15 and a left side plate 16, and an installation space is formed inside the box-type structure;

[0038] The heating component 3 is arranged at the bottom of the installation space, and support plates 53 are respectively arranged on the front plate 13 and the rear plate 14 in the installation space, and moving components 5 are respectively arranged on the two support plates 53. The two moving components 5 are respectively connected with clamping components 2, and the clamping components 2 are located above the heating component 3 and can move with the moving component 5.

[0039] The temperature measuring component is arranged in the installation space and can measure the temperature of the heating component 3 .

[0040] Combination Figure 1 and Figure 2 The front panel 13 is provided with an operation panel 131 and a handle 132; the rear panel 14 is provided with a sensor cooling fan 142; the right side panel 15 is provided with a power interface 151, a switch 152 and a first cooling fan 153; the left side panel 16 is provided with a second cooling fan 161 and an inspection panel 162.

[0041] The sensor cooling fan 142 is used to dissipate heat for the temperature measurement component; the first cooling fan 153 and the second cooling fan 161 are used to dissipate heat for the heating component 3; and the inspection plate 162 is used to facilitate the inspection of the temperature measurement component.

[0042] See also Figure 4 , is a perspective side view of the installation state of a clamping assembly of a hot melt adhesive packaging machine provided by an embodiment of the utility model. Figure 3 and Figure 4 The heating assembly 3 includes a heating plate 31 and a heat conducting plate 32. The heating plate 31 is mounted on the bottom plate 12 through a bracket, the heat conducting plate 32 is arranged on the upper side of the heating plate 31 and fits with the heating plate 31, and a heat conducting strip 321 extends from the side of the heat conducting plate 32.

[0043] Preferably, the heat conducting plate 32 and the heat conducting strip 321 are made of the same material, both of which are made of high thermal conductivity material (such as metal material).

[0044] The temperature measurement assembly includes a temperature measurement chamber 41, a bracket 42 and a temperature sensor 43. The temperature measurement chamber 41 is a sealed space arranged in the installation space close to the rear plate 14. Each side wall of the temperature measurement chamber 41 is made of a heat-insulating material. A bracket 42 is arranged in the temperature measurement chamber 41, and the temperature sensor 43 is arranged on the bracket 42. A through hole (not shown) is arranged on one side wall of the temperature measurement chamber 41, and the heat-conducting strip 321 extends into the temperature measurement chamber 41 through the through hole to contact the probe of the temperature sensor 43. A sensor cooling fan 142 is arranged on the rear plate 14 to dissipate heat in the temperature measurement chamber.

[0045] Preferably, the side wall of the temperature measurement chamber 41 and the bracket 42 are both made of a material with low thermal conductivity (such as thermal insulation plastic), and the gap between the thermal conductive strip 321 and the perforation is sealed with a thermal insulation material.

[0046] In this embodiment, the temperature measurement chamber 41 is located at a corner formed by the bottom plate 12, the rear plate 14 and the left side plate 16 in the installation space, and a part of the bottom plate 12, the rear plate 14 and the left side plate 16 serve as the side wall of the temperature measurement chamber 41. The inspection plate 162 is arranged on the left side plate 16 at a position corresponding to the temperature measurement chamber 41, so as to facilitate the inspection of the temperature measurement component.

[0047] The moving assembly 5 includes a spring device 51 , a moving plate 52 , an adjusting nut 54 and a rotating bearing 55 .

[0048] The movable plate 52 slides between the bottom surface of the top plate 11 and the top surface of the support plate 53 in a direction parallel to the rear plate 14 in a direction approaching / moving away from the rear plate 14 or the front plate 13. The top and bottom of the movable plate 52 are respectively provided with guide bars, and a second guide groove 531 is provided at a position corresponding to the guide bar on the top surface of the support plate 53, and a third guide groove (not shown) is provided at a position corresponding to the guide bar on the bottom of the top plate 11. The movable plate 52 moves along the second guide groove 531 and the third guide groove through the guide bar.

[0049] One end of the spring device 51 is connected to the side of the moving plate 52 away from the rear plate 14 or the front plate 13 , and the other end of the spring device 51 is connected to the clamping assembly 2 .

[0050] The spring device 51 includes an outer spring sleeve and an inner spring sleeve that are interlocked with each other, and a strong spring is arranged between the outer spring sleeve and the inner spring sleeve. When the spring device 51 is compressed, the inner spring sleeve contracts into the outer spring sleeve, thereby compressing the strong spring. When the spring device 51 is restored, the inner spring sleeve extends from the outer spring sleeve, thereby restoring the compressed spring.

[0051] There are multiple spring devices 51 , which are arranged in parallel between the moving plate 52 and the clamping assembly 2 .

[0052] A second adjusting screw hole 141 is provided at the central position of the rear plate 14, and the adjusting nut 54 is screwed through the second adjusting screw hole 141, and the end of the adjusting nut 54 is connected to the side of the moving plate 52 close to the rear plate 14 through the rotating bearing 55. When the clamping force of the clamping assembly 2 needs to be increased, it is only necessary to rotate the adjusting nut 54 so that the adjusting nut 54 rotates toward the inside of the housing 1, thereby pushing the moving plate 52 away from the rear plate 14, thereby compressing the spring device 51, and increasing the clamping force of the clamping assembly 2 by reducing the distance between the moving plate 52 and the clamping assembly 2. Similarly, when the clamping force of the clamping assembly 2 needs to be reduced, it is only necessary to rotate the adjusting nut 54 in the opposite direction.

[0053] Similarly, a first adjusting screw hole 133 is provided at the center of the front plate 13, and another adjusting nut is threadedly rotated through the first adjusting screw hole 133, and the end of the adjusting nut is connected to the side of the moving plate close to the front plate 13 through a rotating bearing.

[0054] The clamping assembly 2 includes a clamping plate 21, the bottom of which is located in the installation space, and the top of which extends from the top plate 11 to the outside of the outer shell 1. The other end of the spring device 51 is fixedly connected to the side of the bottom of the clamping plate 21 facing the rear plate 14 or the front plate 13. An arc-shaped guide portion 211 is provided on the top of the clamping plate 21 to facilitate guiding the materials to be glued to between the two clamping plates 21.

[0055] Furthermore, the heat conducting plate 32 and the heat conducting strip 321 are both long strip structures, and the length of the heat conducting plate 32 and the heat conducting strip 321 is greater than or equal to the length of the clamping plate 21 .

[0056] A shielding plate 22 is vertically connected to the middle position of the clamping plate 21, a first guide bar 221 is provided on the bottom surface of the shielding plate 22, and a corresponding first guide groove 111 is provided on the top surface of the top plate 11. The shielding plate 22 can slide back and forth on the top surface of the top plate 11 along the first guide groove 111 through the first guide bar 221.

[0057] The functions of the shielding plate 22 are, firstly, to cooperate with the spring device 51 to ensure that the clamping plate 21 moves forward and backward along a straight line; secondly, to shield the gap between the clamping plate 21 and the top plate 11 during the forward and backward movement of the clamping plate 21 to prevent debris from falling into the installation space.

[0058] Furthermore, in order to ensure that the movement trajectory of the clamping assembly 2 is a straight line, side guide bars 212 are further provided on the left and right sides of the clamping plate 21. The side guide bars 212 can cooperate with the side guide grooves on the side guide plates (not shown) provided in the installation space to further position the clamping assembly 2.

[0059] The operation panel 131 is connected to the heating plate 31 and the temperature sensor 43 respectively. The operation panel 131 sets the heating temperature. When the temperature measurement component detects that the heat conducting plate 32 reaches the set temperature, the heating component 3 stops heating.

[0060] It should be clarified that the present application includes two clamping assemblies 2 and two moving assemblies 5 of the same structure. Among the two clamping assemblies 2 and the two moving assemblies 5, one clamping assembly 2 and the moving assembly 5 are located on the side of the front plate 13, and one clamping assembly 2 and the moving assembly 5 are located on the side of the rear plate 14. For the sake of simplicity of description, in this embodiment, "rear plate 14 or front plate 13" is used to represent the installation relationship and positional relationship of the clamping assembly 2 and the moving assembly 5 located at the positions of the rear plate 14 and the front plate 13, respectively. In summary, it can be seen that in this embodiment, positions involving "rear plate 14 or front plate 13", "rear plate 14 / front plate 13" and similar expressions all represent two technical solutions: the installation and positional relationship at the position of the rear plate 14 and the installation and positional relationship at the position of the front plate 13.

[0061] It should be noted that the operation panel, handle, sensor cooling fan, power interface, switch, first cooling fan, second cooling fan, heating plate, heat conducting plate, temperature sensor and spring in the utility model are all universal standard parts or parts known to those skilled in the art, and their structures and principles are all known to those skilled in the art through technical manuals or conventional experimental methods, and are not described in detail in the utility model. In addition. The power interface in the present application is the power supply component of the entire device. It is common knowledge in the art to electrically connect with all electrical components such as the operation panel, sensor cooling fan, switch, first cooling fan, second cooling fan, heating plate and temperature sensor, and the specific wiring method and connection method are all common knowledge in the art, and can be freely adjusted by those skilled in the art according to actual needs, and are not described in detail in the utility model. Similarly, the operation panel is the central control element of the device, and it is common knowledge in the art to electrically connect with all electronic components that need to be controlled such as the power interface, switch, heating plate and temperature sensor, and the specific wiring method and connection method are all common knowledge in the art, and can be freely adjusted by those skilled in the art according to actual needs, and are not described in detail in the utility model. In addition, conventional designs / modifications made by technical personnel in this field to achieve the technical effects of the utility model based on the common knowledge in the field are all conventional technical means in the field and will not be repeated in the utility model.

[0062] The above is only a specific implementation of the present application. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. The protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A hot melt adhesive packaging machine, characterized in that: The hot melt adhesive packaging machine comprises: a housing (1), a clamping component (2), a heating component (3), a temperature measuring component and a moving component (5); The housing (1) is a box-type structure formed by interconnecting a top plate (11), a bottom plate (12), a front plate (13), a rear plate (14), a right side plate (15) and a left side plate (16), and an installation space is formed inside the box-type structure; The heating component (3) is arranged at the bottom of the installation space, and support plates (53) are respectively arranged on the front plate (13) and the rear plate (14) in the installation space, and the two support plates (53) are respectively arranged with moving components (5), and the two moving components (5) are respectively connected with clamping components (2), and the clamping components (2) are located above the heating component (3) and can move forward and backward with the moving component (5); The temperature measuring component is arranged in the installation space and is capable of measuring the temperature of the heating component (3).

2. A hot melt adhesive packaging machine according to claim 1, characterized in that: The heating assembly (3) comprises a heating plate (31) and a heat conducting plate (32); The heating plate (31) is mounted on the bottom plate (12), the heat conducting plate (32) is arranged on the upper side of the heating plate (31) and is in contact with the heating plate (31), and a heat conducting strip (321) extends from the side of the heat conducting plate (32).

3. A hot melt adhesive packaging machine according to claim 2, characterized in that: The temperature measurement assembly comprises a temperature measurement chamber (41), a bracket (42) and a temperature sensor (43); The temperature measurement chamber (41) is arranged at a position close to the rear plate (14) in the installation space, the bracket (42) is arranged in the temperature measurement chamber (41), and the temperature sensor (43) is arranged on the bracket (42); a through hole is arranged on a side wall of the temperature measurement chamber (41), the heat conductive strip (321) passes through the through hole and extends into the temperature measurement chamber (41) to contact with a probe of the temperature sensor (43), and a sensor cooling fan (142) is arranged on the rear plate (14) for cooling the temperature measurement chamber.

4. A hot melt adhesive packaging machine according to claim 3, characterized in that: The moving assembly (5) comprises a spring device (51), a moving plate (52), an adjusting nut (54) and a rotating bearing (55); The movable plate (52) slides between the top plate (11) and the support plate (53) in a direction parallel to the rear plate (14) in a direction approaching or moving away from the rear plate (14) / front plate (13); one end of the spring device (51) is connected to a side surface of the movable plate (52) away from the rear plate (14) / front plate (13); The rear plate (14) and the front plate (13) are respectively provided with adjustment screw holes at the central positions, and the adjustment nut (54) passes through the adjustment screw holes and the ends thereof are connected to the side surfaces of the movable plate (52) close to the rear plate (14) / front plate (13) through the rotation bearing (55); the adjustment nut (54) and the adjustment screw holes are rotationally connected through threads.

5. A hot melt adhesive packaging machine according to claim 4, characterized in that: The top and bottom of the movable plate (52) are respectively provided with guide bars, a second guide groove (531) is provided at a position corresponding to the guide bar on the top surface of the support plate (53), and a third guide groove is provided at a position corresponding to the guide bar on the bottom of the top plate (11), and the movable plate (52) moves along the second guide groove (531) and the third guide groove via the guide bars.

6. A hot melt adhesive packaging machine according to claim 4, characterized in that: The clamping assembly (2) comprises a clamping plate (21), the bottom of the clamping plate (21) is located in the installation space, the top of the clamping plate (21) extends from the top plate (11) to the outside of the housing (1), the other end of the spring device (51) is fixedly connected to the side of the bottom of the clamping plate (21) facing the rear plate (14) / front plate (13), and the top of the clamping plate (21) is provided with an arc-shaped guide portion (211).

7. A hot melt adhesive packaging machine according to claim 6, characterized in that: A shielding plate (22) is vertically connected to the middle position of the clamping plate (21); a first guide bar (221) is provided on the bottom surface of the shielding plate (22); a corresponding first guide groove (111) is provided on the top surface of the top plate (11); and the shielding plate (22) can slide forward and backward along the first guide groove (111) on the top surface of the top plate (11) via the first guide bar (221).

8. The hot melt adhesive packaging machine according to claim 3, characterized in that: The front panel (13) is provided with an operation panel (131), and the operation panel (131) is used to set the heating temperature. When the temperature sensor (43) detects that the heat conducting plate (32) reaches the set temperature, the heating component (3) stops heating; the rear panel (14) is provided with a sensor cooling fan (142); the right side panel (15) is provided with a power interface (151), a switch (152) and a first cooling fan (153); and the left side panel (16) is provided with a second cooling fan (161).

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