An electric heater for a test chamber

Abstract

The utility model discloses an electric heater for a test box, comprising a synchronous opening and closing mechanism, a synchronous lifting mechanism and a pair of electric heating components; the synchronous opening and closing mechanism comprises a fixed bracket, a transverse driving component, a pair of transverse sliding rods, a first sliding component, a second sliding component, a first rotating component, a second rotating component, a pair of first swing rods and a pair of second swing rods, the synchronous lifting mechanism comprises a lifting driving component, a synchronous lifting component and a telescopic connecting rod, and the synchronous lifting component comprises a lifting sliding rod and a synchronous sliding block; when the transverse driving component drives the first sliding component and the second sliding component to move relative to each other or move away from each other, the pair of electric heating components move or move away synchronously; when the driving motor drives the lifting sliding block and the synchronous sliding block to lift synchronously, the pair of electric heating components lift synchronously; the utility model improves heating uniformity.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heaters, in particular to an electric heater used in a test box. Background Art

[0002] An electric heater is a device that uses electricity to convert electrical energy into heat. These devices are often used to heat air, water, or other liquids to meet a variety of industrial, commercial, or personal needs. Electric heaters are usually composed of one or more resistive heating elements that generate heat when electricity is applied. The design of electric heaters can take many different forms, including resistance wires, electric heating tubes, quartz heaters, etc. A test chamber is a device used to conduct various experiments on products or materials. It can simulate parameters such as temperature, humidity, pressure, light, etc. in different environments to test the performance and reliability of products. Test chambers are widely used in electronics, automobiles, aviation, aerospace, medical devices, pharmaceuticals, etc., and are an indispensable part of scientific research and industrial production.

[0003] At present, the electric heater used in the test box in the prior art is generally fixed somewhere inside the test box, resulting in uneven heat distribution inside the test box, affecting the high temperature test effect. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an electric heater for a test box, so as to improve the uniformity of electric heating.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric heater for a test box, comprising a synchronous opening and closing mechanism, a synchronous lifting mechanism and a pair of electric heating components arranged oppositely;

[0006] The synchronous opening and closing mechanism is arranged on the top inner wall of the test box, and the synchronous opening and closing mechanism comprises a fixed bracket, a transverse driving component, a pair of transverse sliding bars, a first sliding assembly, a second sliding assembly, a first rotating member, a second rotating member, a pair of first swing rods and a pair of second swing rods, the pair of the transverse sliding bars are relatively arranged inside the fixed bracket, the first sliding assembly and the second sliding assembly are both slidably sleeved on the pair of the transverse sliding bars, the driving end of the transverse driving component is connected to the first sliding assembly, and the end of the transverse driving component away from the driving end is fixed in the fixed bracket, the first rotating member and the second rotating member are relatively rotatably connected in the fixed bracket, the two ends of the first rotating member and the second rotating member are respectively rotatably connected to the end of the first swing rod and the end of the second swing rod, and the two sides of the first sliding assembly and the second sliding assembly are respectively rotatably connected to the other end of the first swing rod and the other end of the second swing rod;

[0007] The synchronous lifting mechanism comprises a lifting drive assembly, a synchronous lifting assembly and a telescopic connecting rod, the lifting drive mechanism comprises a driving motor, a screw rod, a limiting rail, a lifting slider and a bottom plate, the motor shaft of the driving motor is fixedly connected to the screw rod through the shaft, the screw rod is rotatably connected to the bottom plate at one end away from the motor shaft, the bottom plate is fixed to the lower end of the limiting rail, the driving motor is vertically fixed to the lower end of the first sliding assembly at one end away from the motor shaft, the limiting rail is vertically fixed to the lower end of the first sliding assembly and is located on the outside of the driving motor, the lifting slider is threadedly sleeved on the screw rod, and the lifting slider is slidably connected in the limiting rail;

[0008] The synchronous lifting assembly comprises a lifting slide bar and a synchronous slider, the synchronous slider is slidably sleeved on the lifting slide bar, the lifting slider and the synchronous slider are at the same height, the two ends of the telescopic connecting rod are respectively fixedly connected to the lifting slider and the synchronous slider, and a pair of the electric heating assemblies are respectively fixed to the lower ends of the lifting slider and the synchronous slider through connecting pieces;

[0009] When the transverse driving component drives the first sliding assembly and the second sliding assembly to move relative to each other or away from each other, the pair of electric heating assemblies move or move away synchronously; when the driving motor drives the lifting slider and the synchronization slider to rise and fall synchronously, the pair of electric heating assemblies rise and fall synchronously.

[0010] Furthermore, the first sliding assembly and the second sliding assembly include a fixed support plate, a pair of sliding sleeves and a pair of swinging fixed blocks, the pair of swinging fixed blocks are relatively fixedly arranged on both sides of the fixed support plate, the pair of sliding sleeves are embedded in the fixed support plate, the sliding sleeves are slidably connected to the transverse sliding rod, and the outer side of the swinging fixed block is rotatably connected to the first swing rod or the second swing rod.

[0011] Furthermore, it also includes a rotating drive mechanism, which includes a rotating motor and a turntable. The motor shaft of the rotating motor is vertically downward, and the top of the rotating motor is fixedly arranged on the top inner wall of the test box. The center of the turntable is fixedly sleeved on the motor shaft of the rotating motor, and the lower end of the turntable is fixedly connected to the fixed bracket.

[0012] Furthermore, the electric heating component includes a semicircular outer shell and a semicircular electric heating tube, the semicircular electric heating tube is arranged in the semicircular outer shell, and a semicircular heating opening is opened on the inner side of the semicircular outer shell. When the transverse driving component drives a pair of the electric heating components to approach each other until they abut against each other, the pair of heating openings are spliced ​​to form a complete cylindrical heating port.

[0013] Furthermore, a dustproof net made of high temperature resistant material is provided on the inner side of the heating opening.

[0014] Furthermore, a semicircular heating chamber is provided inside the semicircular shell, the semicircular electric heating tube is located in the heating chamber, and air inlets and air outlets are respectively provided at both ends of the semicircular shell, the air inlet and the air outlet are both connected to the heating chamber, the air inlet is connected to an external blowing device through a pipe, and when a pair of relatively arranged electric heating components are fitted against each other, the air inlet on each semicircular shell is respectively connected to the air outlet on the other semicircular shell.

[0015] Furthermore, sealing gaskets made of high temperature resistant material are provided inside the air outlet and the air inlet.

[0016] Furthermore, the transverse driving component is a telescopic cylinder.

[0017] Beneficial effects of the utility model:

[0018] The utility model sequentially arranges a synchronous lifting mechanism and a synchronous opening and closing mechanism at the upper ends of a pair of electric heating components, and utilizes the synchronous lifting mechanism to synchronously adjust the lifting height of a pair of electric heating components inside a test box, and utilizes the synchronous opening and closing components to control a pair of electric heating components to approach or move away from each other, thereby realizing the adjustment of the relative distance of a pair of electric heating components. In summary, the utility model can simultaneously adjust the lifting height and relative distance of a pair of electric heating components inside the test box, so that the heating uniformity of a pair of electric heating components when heating the inside of the test box is higher, thereby improving the heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a structural schematic diagram of Example 1 of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the synchronous opening and closing mechanism in the utility model;

[0022] Figure 3 It is a structural schematic diagram of Example 2 of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the electric heating component in the utility model.

[0024] Figure numerals: 1. synchronous opening and closing mechanism; 11. fixed bracket; 12. transverse driving component; 13. transverse sliding rod; 14. first sliding assembly; 15. second sliding assembly; 16. first rotating member; 17. second rotating member; 18. first rocker arm; 19. second rocker arm; 2. synchronous lifting mechanism; 21. driving motor; 22. screw rod; 23. limiting rail; 24. lifting slider; 25. bottom plate; 26. telescopic connecting rod; 27. lifting slider; 28. synchronous slider; 4. electric heating assembly; 41. semicircular shell; 42. semicircular electric heating tube; 43. air inlet; 44. air outlet; 45. heating chamber; 5. rotating driving mechanism; 51. rotating motor; 52. turntable. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0026] Example 1, reference Figure 1 to Figure 2 , which is the first embodiment of the utility model, and which provides an electric heater for a test box, capable of improving the uniformity of electric heating, comprising a synchronous opening and closing mechanism 1, a synchronous lifting mechanism 2, and a pair of electric heating components 4 arranged opposite to each other;

[0027] The synchronous opening and closing mechanism 1 is arranged on the top inner wall of the test box, and the synchronous opening and closing mechanism 1 includes a fixed bracket 11, a transverse driving component 12, a pair of transverse sliding rods 13, a first sliding component 14, a second sliding component 15, a first rotating component 16, a second rotating component 17, a pair of first swing rods 18 and a pair of second swing rods 19. The pair of transverse sliding rods 13 are relatively arranged inside the fixed bracket 11, the first sliding component 14 and the second sliding component 15 are both slidably sleeved on the pair of transverse sliding rods 13, the driving end of the transverse driving component 12 is connected to the first sliding component 14, and the end of the transverse driving component 12 away from the driving end is fixed in the fixed bracket 11, the first rotating component 16 and the second rotating component 17 are relatively rotatably connected in the fixed bracket 11, the two ends of the first rotating component 16 and the second rotating component 17 are respectively rotatably connected to the end of the first swing rod 18 and the end of the second swing rod 19, and the two sides of the first sliding component 14 and the second sliding component 15 are respectively rotatably connected to the other end of the first swing rod 18 and the other end of the second swing rod 19;

[0028] The synchronous lifting mechanism 2 includes a lifting drive component, a synchronous lifting component and a telescopic connecting rod 26. The lifting drive mechanism includes a driving motor 21, a screw rod 22, a limiting rail 23, a lifting slider 24 and a bottom plate 25. The motor shaft of the driving motor 21 is fixedly connected to the screw rod 22 through the shaft. The screw rod 22 is rotatably connected to the bottom plate 25 at one end away from the motor shaft. The bottom plate 25 is fixed to the lower end of the limiting rail 23. The driving motor 21 is vertically fixed to the lower end of the first sliding component 14 at one end away from the motor shaft. The limiting rail 23 is vertically fixed to the lower end of the first sliding component 14 and is located on the outside of the driving motor 21. The lifting slider 24 is threadedly sleeved on the screw rod 22, and the lifting slider 24 is slidably connected in the limiting rail 23.

[0029] The synchronous lifting assembly includes a lifting slide bar 27 and a synchronous slider 28. The synchronous slider 28 is slidably sleeved on the lifting slide bar 27. The lifting slider 24 and the synchronous slider 28 are at the same height. The two ends of the telescopic connecting rod 26 are respectively fixedly connected to the lifting slider 24 and the synchronous slider 28. A pair of electric heating assemblies 4 are respectively fixed to the lower ends of the lifting slider 24 and the synchronous slider 28 through connecting pieces.

[0030] When the transverse driving component 12 drives the first sliding component 14 and the second sliding component 15 to move relative to or away from each other, the pair of electric heating components 4 move or move away synchronously; when the driving motor 21 drives the lifting slider 24 and the synchronous slider 28 to rise and fall synchronously, the pair of electric heating components 4 rise and fall synchronously.

[0031] Preferably, the first sliding assembly 14 and the second sliding assembly 15 include a fixed support plate, a pair of sliding sleeves and a pair of swinging fixed blocks. The pair of swinging fixed blocks are relatively fixedly arranged on both sides of the fixed support plate, and the pair of sliding sleeves are embedded in the fixed support plate. The sliding sleeves are slidably connected to the transverse slide rod 13, and the outer side of the swinging fixed block is rotatably connected to the first rocker arm 18 or the second rocker arm 19.

[0032] Preferably, the transverse driving component 12 is a telescopic cylinder.

[0033] Working principle of embodiment 1:

[0034] The telescopic rod of the telescopic cylinder is fixedly connected to the fixed support plate. When the telescopic rod of the telescopic cylinder extends outward, the first swing rod 18 swings clockwise, driving the first rotating member 16 and the second rotating member 17 to rotate counterclockwise, thereby driving the second swing rod 19 to swing clockwise, so as to drive the first sliding assembly 14 and the second sliding assembly 15 to approach each other, thereby driving the pair of electric heating assemblies 4 to approach each other; when the telescopic rod of the telescopic cylinder contracts inward, the first swing rod 18 swings counterclockwise, driving the first rotating member 16 and the second rotating member 17 to rotate clockwise, thereby driving the second swing rod 19 to swing counterclockwise, thereby driving the first sliding assembly 14 and the second sliding assembly 15 to move away from each other, thereby driving the pair of electric heating assemblies 4 to move away from each other; when the driving motor 21 is driven in the forward direction, the screw rod 22 rotates clockwise, driving the lifting slider 24 to rise, thereby driving and then driving the pair of electric heating assemblies 4 to rise vertically; when the driving motor 21 is driven in the reverse direction, the screw rod 22 rotates counterclockwise, driving the lifting slider 24 to descend, thereby driving and then driving the pair of electric heating assemblies 4 to descend vertically.

[0035] In summary, this embodiment can simultaneously adjust the lifting height and relative distance of a pair of electric heating components 4 inside the test box, so that the heating uniformity of the pair of electric heating components 4 when heating the inside of the test box is higher, thereby improving the heating effect.

[0036] Example 2, reference Figure 3 , which is the second embodiment of the utility model. Different from the previous embodiment, this embodiment provides a rotating drive mechanism 5, which can further improve the heating uniformity, and comprises: a rotating drive mechanism 5, the rotating drive mechanism 5 comprises a rotating motor 51 and a turntable 52, the motor shaft of the rotating motor 51 is vertically downward, the top of the rotating motor 51 is fixedly arranged on the top inner wall of the test box, the center of the turntable 52 is fixedly sleeved on the motor shaft of the rotating motor 51, and the lower end of the turntable 52 is fixedly connected to the fixed bracket 11.

[0037] Working principle of embodiment 2:

[0038] When the rotating motor 51 drives the turntable 52 to rotate, the synchronous opening and closing mechanism 1, the synchronous lifting mechanism 2 and the pair of relatively arranged electric heating components 4 located at the lower end of the turntable 52 rotate synchronously. At this time, the pair of electric heating components 4 can not only be lifted and lowered in the vertical direction, move relatively close to and away from each other in the horizontal direction, but also rotate in the horizontal direction. During the rotational heating process, the heating uniformity inside the test chamber is further improved.

[0039] Example 3, reference Figure 4, which is the third embodiment of the utility model. Different from the previous embodiment, this embodiment provides an electric heater for a test box, which can improve the heating efficiency of the electric heating component 4. It includes a semicircular shell 41 and a semicircular electric heating tube 42. The semicircular electric heating tube 42 is arranged in the semicircular shell 41. The inner side of the semicircular shell 41 is provided with a semicircular heating opening. When the transverse driving component 12 drives a pair of electric heating components 4 to approach each other until they abut against each other, the pair of heating openings are spliced ​​to form a complete cylindrical heating port.

[0040] Preferably, a dustproof net made of high temperature resistant material is provided on the inner side of the heating opening.

[0041] Specifically, in this embodiment, by arranging a dustproof net made of high-temperature resistant and flame-retardant material on the inner side of the heating opening, the dustproof net can achieve a dustproof effect while not burning due to the high temperature generated by heating, thereby extending the service life of the semicircular electric heating tube 42.

[0042] Preferably, a semicircular heating chamber 45 is provided inside the semicircular outer shell 41, and the semicircular electric heating tube 42 is located in the heating chamber 45. An air inlet 43 and an air outlet 44 are respectively provided at both ends of the semicircular outer shell 41. The air inlet 43 and the air outlet 44 are both connected to the heating chamber 45. The air inlet 43 is connected to an external blowing device through a pipe. When a pair of electric heating components 4 arranged opposite to each other are in contact with each other, the air inlet 43 on each semicircular outer shell 41 is respectively connected to the air outlet 44 on the other semicircular outer shell 41.

[0043] Working principle of embodiment 3:

[0044] When the two semicircular shells 41 are spliced ​​against each other, a pair of heating openings are spliced ​​to form a complete cylindrical heating port. At this time, the heat can be more concentrated in the internal space of the complete heating port, so the heating efficiency can be improved without changing the amount of electric heating. At the same time, by opening an air inlet 43 and an air outlet 44 on the semicircular shell 41, using a blasting device to blow air to the air outlet 44, and then blowing it into the air inlet 43 of the other semicircular shell 41, the cycle is repeated to achieve hot air flow, so that the heat of the two heating chambers 45 can be more uniform, further improving the heating uniformity of the test box.

[0045] Preferably, sealing gaskets made of high temperature resistant material are provided inside the air outlet 44 and the air inlet 43 .

[0046] Specifically, in this embodiment, the sealing gasket can be made of asbestos material. Asbestos sealing material has excellent heat resistance, chemical corrosion resistance and mechanical strength, and is suitable for various sealing needs. By arranging a sealant made of asbestos material on the inner side of the air outlet 44 and the air inlet 43, the sealing performance of the two semicircular shells 41 when spliced ​​can be improved to ensure the ventilation and heat circulation effect.

[0047] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. An electric heater for a test chamber, characterized in that: It comprises a synchronous opening and closing mechanism (1), a synchronous lifting mechanism (2), and a pair of electric heating components (4) arranged opposite to each other; The synchronous opening and closing mechanism (1) is arranged on the top inner wall of the test box, and comprises a fixed bracket (11), a transverse driving component (12), a pair of transverse sliding rods (13), a first sliding component (14), a second sliding component (15), a first rotating component (16), a second rotating component (17), a pair of first swing rods (18) and a pair of second swing rods (19). The pair of transverse sliding rods (13) are relatively arranged inside the fixed bracket (11), the first sliding component (14) and the second sliding component (15) are both slidably sleeved on the pair of transverse sliding rods (13), and the transverse driving component (12) is The driving end is connected to the first sliding component (14), the end of the transverse driving component (12) away from the driving end is fixed in the fixed bracket (11), the first rotating member (16) and the second rotating member (17) are relatively rotatably connected in the fixed bracket (11), the two ends of the first rotating member (16) and the second rotating member (17) are respectively rotatably connected to the end of the first swing rod (18) and the end of the second swing rod (19), and the two sides of the first sliding component (14) and the second sliding component (15) are respectively rotatably connected to the other end of the first swing rod (18) and the other end of the second swing rod (19); The synchronous lifting mechanism (2) comprises a lifting drive component, a synchronous lifting component and a telescopic connecting rod (26); the lifting drive mechanism comprises a driving motor (21), a screw rod (22), a limiting rail (23), a lifting slider (24) and a bottom plate (25); the motor shaft of the driving motor (21) is fixedly connected to the screw rod (22) through the shaft; the screw rod (22) is rotatably connected to the bottom plate (25) at one end away from the motor shaft; the bottom plate (25) is fixed to the lower end of the limiting rail (23); the driving motor (21) is vertically fixed to the lower end of the first sliding component (14) at one end away from the motor shaft; the limiting rail (23) is vertically fixed to the lower end of the first sliding component (14) and is located outside the driving motor (21); the lifting slider (24) is threadedly sleeved on the screw rod (22); and the lifting slider (24) is slidably connected to the limiting rail (23); The synchronous lifting component comprises a lifting slide bar (27) and a synchronous slider (28), the synchronous slider (28) is slidably sleeved on the lifting slide bar (27), the lifting slider (24) and the synchronous slider (28) are at the same height, the two ends of the telescopic connecting rod (26) are respectively fixedly connected to the lifting slider (24) and the synchronous slider (28), and a pair of the electric heating components (4) are respectively fixed to the lower ends of the lifting slider (24) and the synchronous slider (28) through connecting pieces; When the transverse driving component (12) drives the first sliding component (14) and the second sliding component (15) to move relative to each other or move away from each other, the pair of electric heating components (4) move synchronously or move away from each other; when the driving motor (21) drives the lifting slider (24) and the synchronization slider (28) to rise and fall synchronously, the pair of electric heating components (4) rise and fall synchronously.

2. The electric heater for a test box according to claim 1, characterized in that: The first sliding assembly (14) and the second sliding assembly (15) comprise a fixed support plate, a pair of sliding sleeves and a pair of swinging fixed blocks. The pair of swinging fixed blocks are relatively fixedly arranged on both sides of the fixed support plate. The pair of sliding sleeves are embedded in the fixed support plate. The sliding sleeves are slidably connected to the transverse sliding rod (13). The outer side of the swinging fixed block is rotatably connected to the first swing rod (18) or the second swing rod (19).

3. The electric heater for a test box according to claim 1, characterized in that: It also includes a rotation drive mechanism (5), the rotation drive mechanism (5) includes a rotation motor (51) and a turntable (52), the motor shaft of the rotation motor (51) is vertically downward, the top of the rotation motor (51) is fixedly arranged on the top inner wall of the test box, the center of the turntable (52) is fixedly sleeved on the motor shaft of the rotation motor (51), and the lower end of the turntable (52) is fixedly connected to the fixed bracket (11).

4. The electric heater for a test box according to claim 1, characterized in that: The electric heating component (4) comprises a semicircular outer shell (41) and a semicircular electric heating tube (42), wherein the semicircular electric heating tube (42) is arranged in the semicircular outer shell (41), and a semicircular heating opening is provided on the inner side of the semicircular outer shell (41). When the transverse driving component (12) drives a pair of the electric heating components (4) to approach each other until they abut against each other, the pair of heating openings are spliced ​​to form a complete cylindrical heating port.

5. The electric heater for a test box according to claim 4, characterized in that: A dustproof net made of high temperature resistant material is arranged on the inner side of the heating opening.

6. The electric heater for a test box according to claim 4, characterized in that: A semicircular heating chamber (45) is provided inside the semicircular shell (41), and the semicircular electric heating tube (42) is located in the heating chamber (45). An air inlet (43) and an air outlet (44) are respectively provided at both ends of the semicircular shell (41), and the air inlet (43) and the air outlet (44) are both connected to the heating chamber (45). The air inlet (43) is connected to an external air blowing device through a pipeline. When a pair of electric heating components (4) arranged opposite to each other are fitted against each other, the air inlet (43) on each semicircular shell (41) is respectively connected to the air outlet (44) on the other semicircular shell (41).

7. The electric heater for a test box according to claim 6, characterized in that: Sealing pads made of high temperature resistant material are provided inside the air outlet (44) and the air inlet (43).

8. The electric heater for a test box according to claim 1, characterized in that: The transverse movement driving component (12) is a telescopic cylinder.

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