Ultrahigh and low temperature test box

Abstract

The invention relates to an ultrahigh and low temperature test box, and belongs to the technical field of test boxes. The ultrahigh and low temperature test box comprises a box body and a box door hinged to the side face of the box body, a heat preservation layer is arranged in the box body, a box air duct is arranged between the heat preservation layer and the inner wall of the box body, an air inlet is formed in the outer side face of the box door, a door air duct communicated with the air inlet is arranged in the box door, and the door air duct is communicated with the box air duct. An air outlet is formed in the side face of the box body and communicated with the box body air channel, a draught fan is installed in the box body, an air heat insulation power wind wheel is installed in the box body air channel and close to the air outlet, and a rotating shaft of the air heat insulation power wind wheel is fixedly connected with the output end of the draught fan. A circulating wind wheel is installed in the heat preservation layer, and the output end of the circulating wind wheel is fixedly connected with a rotating shaft of the air heat insulation power wind wheel. The ultra-high and low-temperature test box can achieve an effective heat insulation effect on the basis of reducing the thickness of the heat preservation layer.

Description

Technical Field

[0001] The invention belongs to the technical field of test chambers, and in particular relates to an ultra-high and low temperature test chamber. Background Art

[0002] With the advancement of science and technology and the increasing demand for industrial production, the requirements for experiments, tests and research in high and low temperature environments are also increasing. The performance of many high-precision equipment, materials and electronic components in extreme temperature environments is the key to research, and performance tests require the use of high and low temperature test chambers.

[0003] The insulation temperature of the ultra-high and low temperature test chamber can reach 500 degrees or above, and -100 degrees or below. In order to meet the insulation requirements, the insulation layer is usually thickened, and a two-layer insulation method is used, with aluminum silicate glass wool inside and polyurethane foam outside to meet the requirements of the ultra-high and low temperature test chamber, but the insulation layer must be at least 150mm to 200mm thick. In some cases where space requirements are limited, the thickness of the insulation layer cannot be thickened, which will cause the edge of the casing to become hot and easily burn the staff. Summary of the invention

[0004] The purpose of the present invention is to provide an ultra-high and low temperature test box with a simple structure and reasonable design in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions: A super-high and low temperature test box, comprising a box body and a box door hinged on the side of the box body, a thermal insulation layer is arranged in the box body, a box air duct is arranged between the thermal insulation layer and the inner wall of the box body, an air inlet is arranged on the outer side of the box door, a door air duct connected to the air inlet is arranged in the box door, the door air duct is connected to the box air duct, an air outlet is arranged on the side of the box body, and the air outlet is connected to the box air duct, a fan is installed in the box body, an air insulation power wind wheel is installed in the box air duct, the air insulation power wind wheel is arranged close to the air outlet, the rotating shaft of the air insulation power wind wheel is fixedly connected to the output end of the fan, a circulating wind wheel is installed in the thermal insulation layer, and the output end of the circulating wind wheel is fixedly connected to the rotating shaft of the air insulation power wind wheel.

[0006] As a further optimization scheme of the present invention, a refrigeration fin is fixed to the inner wall of the door air duct, the side of the refrigeration fin close to the insulation layer is the cold end, and fins are installed at the cold end of the refrigeration fin. A movable frame is installed in the box air duct, the outer side surface of the movable frame is in contact with the inner wall of the box air duct, and the inner side surface of the movable frame is in contact with the outer side surface of the insulation layer. A driving component is provided in the box air duct for pushing the movable frame to slide along the length direction of the box body.

[0007] As a further optimization scheme of the present invention, a support block is fixed to the inner bottom surface of the box air duct, and the top surface of the support block is fixedly connected to the bottom surface of the insulation layer, and the movable frame includes two vertically arranged scraping strips, a horizontal plate is fixed between the top ends of the two scraping strips, and the bottom ends of the two scraping strips are fixed with fixing plates, and a yielding plate is installed between the two fixing plates, and the yielding plate can contact the support block, and a connecting block 1 is fixed to the side surface of one of the fixing plates, and a connecting block 2 is fixed to the side surface of the yielding plate, a connecting rod is passed through the connecting block 1 and the connecting block 2, the connecting block 1 is rotatably connected to the connecting rod, and the connecting block 2 is rotatably connected to the connecting rod, and the outer periphery of the connecting rod is provided with a torsion spring 1, one end of the torsion spring 1 is fixedly connected to the connecting block 1, and the other end of the torsion spring 1 is fixedly connected to the connecting block 2.

[0008] As a further optimization scheme of the present invention, the driving assembly includes two screws rotatably installed in the box air duct, the screws correspond to the scraper strips one by one, the scraper strips are sleeved on the corresponding outer peripheries of the screws, the scraper strips are threadedly matched with the screws, and fixed blocks are respectively fixed on the relative inner sides of the box air duct, a synchronous wheel 1 is rotatably installed on the fixed block, a synchronous wheel 2 is sleeved and fixed on the outer periphery of the screw, a belt is wound around the outer periphery of the synchronous wheel 1 and the synchronous wheel 2, a motor is installed on the fixed block, and the output end of the motor is fixedly connected to the rotating shaft of the synchronous wheel 1.

[0009] As a further optimization solution of the present invention, two horizontally arranged guide rods are fixed in the box air duct, the guide rods are arranged along the length direction of the box body, and the scraper strips are sleeved on the outer periphery of the guide rods.

[0010] As a further optimization scheme of the present invention, a horizontally arranged baffle plate 1 is fixed to the outer side surface of the box body, a vertically arranged baffle plate 2 is fixed to the top surface of the baffle plate 1, a plurality of hoses are installed between the baffle plate 2 and the box door, one end of the hose is passed through and fixed to the side surface of the baffle plate 2, the other end of the hose is connected to the air duct of the box door, a water outlet is arranged at the bottom of the box door, and a wind shield for covering the air outlet is installed on the side surface of the box body along a vertical sliding manner.

[0011] As a further optimization scheme of the present invention, the wind shield includes a vertically arranged baffle three, and two horizontally arranged abutment plates are fixed to the side of the baffle three close to the baffle two. The baffle three is rotatably installed with a baffle four on the side away from the box body, and the side of the baffle four away from the baffle three can be fitted with the baffle two.

[0012] As a further optimization scheme of the present invention, a mounting plate is fixed to the outer side surface of the box body, a dovetail bar is fixed to the bottom surface of the mounting plate, a sliding bar is fixed to the side surface of the baffle three, a dovetail groove is provided on the side surface of the sliding bar close to the box body, the sliding bar slides with the dovetail bar in the vertical direction, a handle is fixed to the side surface of the baffle three, and the mounting plate is an electromagnet, which can attract the abutment plate after being energized.

[0013] As a further optimization scheme of the present invention, two blocks are fixed on the side of the baffle three, and a rotating rod is rotatably installed between the two blocks. The baffle four is sleeved on the outer periphery of the rotating rod, and a torsion spring two is sleeved on the outer periphery of the rotating rod. One end of the torsion spring two is fixedly connected to the block, and the other end of the torsion spring two is fixedly connected to the baffle four.

[0014] The beneficial effects of the present invention are as follows: when the test box needs to be heat-insulated, outside air enters the door air duct through the air inlet and then enters the box air duct. The outside cold air flowing in the box air duct wraps the surrounding side of the thermal insulation layer and is then discharged outward through the air outlet, forming a path for cold air to enter the hot air. The continuous flow of cold air will not cause the surface temperature of the box body to continue to rise, thereby forming a heat insulation protection, thereby reducing the possibility of scalding the staff due to excessively high temperature on the outer surface of the box body; the thermal conductivity of polyurethane is 0.018-0.024W / (m·K), the thermal conductivity of aluminum silicate glass wool is 0.035W / (m·K) to 0.043W / (m·K), and the thermal conductivity of air is 0.023W / (m·K), which is equivalent to the two. On the basis of reducing the thickness of the thermal insulation layer, this method can effectively reduce the heat transfer in the box body, thereby achieving an effective heat insulation effect on the basis of reducing the thickness of the thermal insulation layer; When the test box needs to be kept cold, the outside air enters the door air duct through the air inlet, the refrigeration plate cools down the outside air, and the cooled cold air enters the box air duct, thereby insulating the insulation layer. At the same time, the abutment plate abuts against baffle one, and baffle four fits against baffle two to close the air outlet. The cold air at the air outlet enters the door air duct again through the hose, thereby improving the refrigeration effect and saving energy and being efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 is a cross-sectional view of the box body in Example 1 of the present invention; Figure 3 is a schematic diagram of the overall structure of Embodiment 2 of the present invention; Figure 4 is a cross-sectional view of the box body in Example 2 of the present invention; Figure 5 is a schematic diagram of the structure of the driving component in Embodiment 2 of the present invention; Figure 6 is a schematic diagram of the structure of the mobile frame in Embodiment 2 of the present invention; Figure 7 Embodiment 2 of the present invention Figure 6 Enlarged view of point A in the middle; Figure 8 Embodiment 2 of the present invention Figure 5 Enlarged view of point B in the middle; Fig. 9 is a schematic structural diagram of a windshield in Embodiment 2 of the present invention; Fig.10 Embodiment 2 of the present invention Fig. 9 Enlarged view of center C.

[0016] Figure numerals: 1, box body; 11, insulation layer; 12, box air duct; 13, air outlet; 14, fan; 15, air insulation power wind wheel; 16, circulation wind wheel; 2, box door; 21, air inlet; 22, door air duct; 3, refrigeration plate; 31, moving frame; 311, scraper; 312, horizontal plate; 313, fixed plate; 3131, connecting block 1; 314, give way plate; 3141, connecting block 2; 315, connecting rod; 316, torsion spring 1; 32, support block; 33, Fin; 4. Drive assembly; 41. Screw; 411. Synchronous wheel 2; 42. Fixed block; 43. Synchronous wheel 1; 44. Belt; 45. Motor; 46. Guide rod; 5. Hose; 51. Baffle 1; 52. Baffle 2; 53. Mounting plate; 54. Dovetail strip; 55. Water outlet; 6. Wind shield; 61. Baffle 3; 611. Sliding strip; 6111. Dovetail groove; 612. Handle; 62. Abutment plate; 63. Baffle 4; 64. Block; 65. Rotating rod; 66. Torsion spring 2. DETAILED DESCRIPTION

[0017] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0018] Example 1 like Figure 1 , Figure 2 As shown, an ultra-high and low temperature test box includes a box body 1 and a box door 2 hinged to the side of the box body 1, and a thermal insulation layer 11 is arranged in the box body 1. An air inlet 21 is arranged on the outer side of the box door 2, and a door air duct 22 connected to the air inlet 21 is arranged in the box door 2. A box air duct 12 is arranged between the thermal insulation layer 11 and the inner wall of the box body 1, and the door air duct 22 is connected to the box air duct 12. An air outlet 13 is arranged on the side of the box body 1, and the air outlet 13 is connected to the box air duct 12. A fan 14 is installed in the box body 1, and an air insulation power wind wheel 15 is installed in the box air duct 12. The air insulation power wind wheel 15 is arranged close to the air outlet 13, and the rotating shaft of the air insulation power wind wheel 15 is fixedly connected to the output end of the fan 14. A circulating wind wheel 16 is installed in the thermal insulation layer 11 , and an output end of the circulating wind wheel 16 is fixedly connected to a rotating shaft of the air heat-insulating power wind wheel 15 .

[0019] Outside air enters the door air duct 22 through the air inlet 21, and then enters the box air duct 12. The outside cold air flowing in the box air duct 12 wraps the surrounding side of the insulation layer 11, and then is discharged outward through the air outlet 13, forming a path for cold air to enter the hot air. The continuous flow of cold air will not cause the surface temperature of the box body 1 to continue to rise, thereby forming a kind of heat insulation protection, thereby reducing the possibility of scalding the staff due to the excessive temperature of the outer surface of the box body 1.

[0020] The implementation principle of Example 1 of the present application is: the thermal conductivity of polyurethane is 0.018-0.024W / (m·K), the thermal conductivity of aluminum silicate glass wool is 0.035W / (m·K) to 0.043W / (m·K), and the thermal conductivity of air is 0.023W / (m·K). The thermal conductivity of air is equivalent to the two. On the basis of reducing the thickness of the insulation layer 11, this method can effectively reduce the heat transfer in the box body 1, thereby achieving an effective insulation effect on the basis of reducing the thickness of the insulation layer 11.

[0021] Example 2 like Figure 3 , Figure 4 As shown, a cooling fin 3 is fixed to the inner wall of the door air duct 22, and the side of the cooling fin 3 close to the insulation layer 11 is the cold end, and the cold end of the cooling fin 3 is installed with a fin 33. When the test box needs to be refrigerated, the outside air enters the door air duct 22 through the air inlet 21, and the cooling fin 3 cools the outside air. The cooled cold air enters the box air duct 12, thereby keeping the insulation layer 11 warm.

[0022] like Figure 5 , Figure 6As shown, a moving frame 31 is slidably installed in the box air duct 12, and a water outlet 55 is provided at the bottom of the box door 2. The outer side surface of the moving frame 31 is in contact with the inner wall of the box air duct 12, and the inner side surface of the moving frame 31 is in contact with the outer side surface of the insulation layer 11. A driving component 4 is provided in the box air duct 12 for pushing the moving frame 31 to slide along the length direction of the box body 1.

[0023] like Figure 5 , Figure 6 and Figure 7 As shown, the movable frame 31 includes two vertically arranged scraping strips 311, and a horizontal piece 312 is fixed between the top ends of the two scraping strips 311. A fixing piece 313 is fixed to the bottom ends of the two scraping strips 311, and a clearance piece 314 is installed between the two fixing pieces 313. A support block 32 is fixed to the inner bottom surface of the box air duct 12, and the top surface of the support block 32 is fixedly connected to the bottom surface of the insulation layer 11, and the clearance piece 314 can contact the support block 32. A connecting block 1 3131 is fixed to the side of one of the fixing pieces 313, and a connecting block 2 3141 is fixed to the side of the clearance piece 314. A connecting rod 315 is inserted between the connecting block 1 3131 and the connecting block 2 3141, and the connecting block 1 3131 is rotatably connected to the connecting rod 315, and the connecting block 2 3141 is rotatably connected to the connecting rod 315. A torsion spring 1 316 is sleeved on the outer periphery of the connecting rod 315, one end of the torsion spring 1 316 is fixedly connected to the connecting block 1 3131, and the other end of the torsion spring is fixedly connected to the connecting block 2 3141. When the scraper strip 311 moves toward the direction close to the door 2, the clearance piece 314 abuts against the support block 32 and rotates; when the scraper strip 311 moves toward the direction away from the door 2, the clearance piece 314 is reset under the elastic force of the torsion spring 1 316.

[0024] Outside air enters the box air duct 12 through the air inlet 21. When the water vapor content in the air is high, condensation is easy to form on the inner surface of the box body 1. The driving component 4 drives the scraper 311 to move in the box air duct 12, thereby scraping off the water droplets on the inner surface of the box body 1 and then discharging the water droplets from the box body 1 through the water outlet 55.

[0025] like Figure 5 , Figure 8As shown, the drive assembly 4 includes two screw rods 41 rotatably mounted in the box air duct 12, the screw rods 41 correspond to the scraper strips 311 one by one, the scraper strips 311 are sleeved on the outer periphery of the corresponding screw rods 41, and the scraper strips 311 and the screw rods 41 are threadedly matched. Two horizontally arranged guide rods 46 are fixed in the box air duct 12, and the guide rods 46 are arranged along the length direction of the box body 1. The scraper strips 311 are sleeved on the outer periphery of the guide rods 46, and the guide rods 46 provide a guiding effect for the scraper strips 311. Fixed blocks 42 are respectively fixed on the opposite inner sides of the box air duct 12, and a synchronous wheel 1 43 is rotatably mounted on the fixed blocks 42. A synchronous wheel 2 411 is sleeved and fixed on the outer periphery of the screw rod 41, and a belt 44 is wound around the outer periphery of the synchronous wheel 1 43 and the synchronous wheel 2 411. A motor 45 is installed on the fixed block 42, and the output end of the motor 45 is fixedly connected to the rotating shaft of the synchronous wheel 1 43.

[0026] Start the motor 45, the motor 45 drives the synchronous wheel 1 43 to rotate, the synchronous wheel 1 43 drives the screw 41 to rotate through the belt 44 and the synchronous wheel 2 411, the screw 41 drives the scraper 311 to move in the box air duct 12, so that the scraper 311 reciprocates along the length direction of the box body 1, thereby scraping off the water droplets on the inner surface of the box body 1.

[0027] like Figure 4 , Fig. 9 As shown, a horizontally arranged baffle plate 1 51 is fixed to the outer side surface of the box body 1, and a vertically arranged baffle plate 2 52 is fixed to the top surface of the baffle plate 1 51. A plurality of hoses 5 are installed between the baffle plate 2 52 and the box door 2, one end of the hose 5 is passed through and fixed to the side surface of the baffle plate 2 52, and the other end of the hose 5 is connected to the door air duct 22. A wind shield 6 for covering the air outlet 13 is installed along the vertical sliding on the side surface of the box body 1, and the wind shield 6 includes a vertically arranged baffle plate 3 61, and two horizontally arranged abutment plates 62 are fixed to the side surface of the baffle plate 3 61 close to the baffle plate 2 52. A baffle plate 4 63 is rotatably installed on the side surface of the baffle plate 3 61 away from the box body 1, and the side surface of the baffle plate 4 63 away from the baffle plate 3 61 can fit with the baffle plate 2 52.

[0028] like Fig. 9 , Fig.10 As shown, two blocks 64 are fixed on the side of the baffle plate 3 61, a rotating rod 65 is rotatably installed between the two blocks 64, and the baffle plate 4 63 is sleeved on the outer periphery of the rotating rod 65. A torsion spring 2 66 is sleeved on the outer periphery of the rotating rod 65, one end of the torsion spring 2 66 is fixedly connected to the block 64, and the other end of the torsion spring 2 66 is fixedly connected to the baffle plate 4 63. The baffle plate 4 63 fits with the baffle plate 2 52 under the elastic force of the torsion spring 2 66, thereby forming a closed space at the air outlet 13. When the wind pressure in the box body 1 is too large, the wind pressure will overcome the elastic force of the torsion spring 2 66, so that the air can be discharged to the outside.

[0029] like Figure 4, Fig. 9 and Fig.10 As shown, a horizontally arranged mounting plate 53 is fixed to the outer side of the box body 1, and a vertically arranged dovetail bar 54 is fixed between the mounting plate 53 and the baffle plate 1 51. A sliding bar 611 is fixed to the side of the baffle plate 3 61, and a dovetail groove 6111 is provided on the side of the sliding bar 611 close to the box body 1, and the sliding bar 611 slides and cooperates with the dovetail bar 54 in the vertical direction. A handle 612 is fixed to the side of the baffle plate 3 61, and the mounting plate 53 is an electromagnet, which can attract the abutment plate 62 after being energized. When the refrigeration plate 3 is not working, the baffle plate 3 61 attracts the mounting plate 53, so that the baffle plate 3 61 and the baffle plate 4 63 are located upwind of the air outlet 13, so that the air can be discharged from the air outlet 13. When the refrigeration plate 3 is working, the mounting plate 53 is powered off, and then the baffle three 61 is pulled downward, so that the abutting plate 62 abuts against the baffle one 51, and the baffle four 63 fits against the baffle two 52, thereby closing the air outlet 13, and the cold air at the air outlet 13 enters the door air duct 22 again through the hose 5, thereby cooling the fins 33, so that the water droplets condensed on the fins 33 flow downward, and at the same time improve the cooling effect.

[0030] The implementation principle of Example 2 of the present application is: when the test box needs to be kept cold, the outside air enters the door air duct 22 through the air inlet 21, the refrigeration plate 3 cools down the outside air, and the cooled cold air enters the box air duct 12, thereby insulating the insulation layer 11. At the same time, the abutment plate 62 abuts against the baffle 1 51, and the baffle 4 63 fits against the baffle 2 52 to close the air outlet 13. The cold air at the air outlet 13 enters the door air duct 22 again through the hose 5, thereby improving the cold preservation effect and saving energy and being efficient.

[0031] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. An ultra-high and low temperature test box, comprising a box body (1) and a box door (2) hinged to the side of the box body (1), characterized in that: The box body (1) is provided with a heat-insulating layer (11), a box air duct (12) is provided between the heat-insulating layer (11) and the inner wall of the box body (1), an air inlet (21) is provided on the outer side of the box door (2), a door air duct (22) connected to the air inlet (21) is provided in the box door (2), the door air duct (22) is connected to the box air duct (12), an air outlet (13) is provided on the side of the box body (1), and the air outlet (13) is connected to the box air duct (12). ), a fan (14) is installed in the box body (1), an air insulation power wind wheel (15) is installed in the box air duct (12), the air insulation power wind wheel (15) is arranged near the air outlet (13), the rotating shaft of the air insulation power wind wheel (15) is fixedly connected to the output end of the fan (14), and a circulation wind wheel (16) is installed in the insulation layer (11), and the output end of the circulation wind wheel (16) is fixedly connected to the rotating shaft of the air insulation power wind wheel (15).

2. The ultra-high and low temperature test chamber according to claim 1, characterized in that: A refrigeration fin (3) is fixed to the inner wall of the door air duct (22); the side of the refrigeration fin (3) close to the thermal insulation layer (11) is a cold end; the cold end of the refrigeration fin (3) is provided with a fin (33); a movable frame (31) is installed in the box air duct (12); the outer side surface of the movable frame (31) is in contact with the inner wall of the box air duct (12); the inner side surface of the movable frame (31) is in contact with the outer side surface of the thermal insulation layer (11); and a driving component (4) is provided in the box air duct (12) for pushing the movable frame (31) to slide along the length direction of the box body (1).

3. The ultra-high and low temperature test chamber according to claim 2, characterized in that: A support block (32) is fixed to the inner bottom surface of the box air duct (12); the top surface of the support block (32) is fixedly connected to the bottom surface of the insulation layer (11); the movable frame (31) comprises two vertically arranged scraping strips (311); a horizontal sheet (312) is fixed between the top ends of the two scraping strips (311); a fixing sheet (313) is fixed to the bottom ends of the two scraping strips (311); a clearance sheet (314) is installed between the two fixing sheets (313); the clearance sheet (314) is capable of contacting the support block (32); a connecting block (314) is fixed to the side surface of one of the fixing sheets (313); 31), a connecting block 2 (3141) is fixed on the side of the yielding piece (314), a connecting rod (315) is passed between the connecting block 1 (3131) and the connecting block 2 (3141), the connecting block 1 (3131) is rotatably connected to the connecting rod (315), the connecting block 2 (3141) is rotatably connected to the connecting rod (315), a torsion spring 1 (316) is sleeved on the outer periphery of the connecting rod (315), one end of the torsion spring 1 (316) is fixedly connected to the connecting block 1 (3131), and the other end of the torsion spring 1 (316) is fixedly connected to the connecting block 2 (3141).

4. The ultra-high and low temperature test chamber according to claim 3, characterized in that: The driving assembly (4) comprises two screw rods (41) rotatably mounted in the box air duct (12), the screw rods (41) corresponding to the scraper strips (311) one by one, the scraper strips (311) sleeved on the outer periphery of the corresponding screw rods (41), the scraper strips (311) and the screw rods (41) threadedly matched, fixed blocks (42) are respectively fixed on the opposite inner sides of the box air duct (12), a synchronous wheel 1 (43) is rotatably mounted on the fixed blocks (42), a synchronous wheel 2 (411) is sleeved and fixed on the outer periphery of the screw rods (41), a belt (44) is wound around the outer peripheries of the synchronous wheel 1 (43) and the synchronous wheel 2 (411), a motor (45) is mounted on the fixed block (42), and the output end of the motor (45) is fixedly connected to the rotating shaft of the synchronous wheel 1 (43).

5. The ultra-high and low temperature test chamber according to claim 4, characterized in that: Two horizontally arranged guide rods (46) are fixed in the box air duct (12); the guide rods (46) are arranged along the length direction of the box body (1); and the scraper strips (311) are sleeved on the outer circumference of the guide rods (46).

6. The ultra-high and low temperature test chamber according to claim 4, characterized in that: A horizontally arranged baffle plate 1 (51) is fixed to the outer side surface of the box body (1), a vertically arranged baffle plate 2 (52) is fixed to the top surface of the baffle plate 1 (51), a plurality of hoses (5) are installed between the baffle plate 2 (52) and the box door (2), one end of the hose (5) is passed through and fixed to the side surface of the baffle plate 2 (52), the other end of the hose (5) is connected to the air duct of the box door (2), a water outlet (55) is arranged at the bottom of the box door (2), and a wind shield (6) for covering the air outlet (13) is installed on the side surface of the box body (1) along a vertical sliding direction.

7. The ultra-high and low temperature test chamber according to claim 6, characterized in that: The wind shield (6) includes a vertically arranged baffle plate three (61), and two horizontally arranged abutment plates (62) are fixed to the side of the baffle plate three (61) close to the baffle plate two (52). The baffle plate three (61) is rotatably mounted with a baffle plate four (63) on the side away from the box body (1), and the side of the baffle plate four (63) away from the baffle plate three (61) can fit with the baffle plate two (52).

8. The ultra-high and low temperature test chamber according to claim 7, characterized in that: A mounting plate (53) is fixed to the outer side surface of the box body (1), a dovetail bar (54) is fixed to the bottom surface of the mounting plate (53), a sliding bar (611) is fixed to the side surface of the baffle plate three (61), a dovetail groove (6111) is provided on the side surface of the sliding bar (611) close to the box body (1), the sliding bar (611) is slidably matched with the dovetail bar (54) in the vertical direction, a handle (612) is fixed to the side surface of the baffle plate three (61), and the mounting plate (53) is an electromagnet, which can attract the abutment plate (62) after being energized.

9. The ultra-high and low temperature test chamber according to claim 7, characterized in that: Two blocks (64) are fixed on the side of the baffle plate three (61), and a rotating rod (65) is rotatably installed between the two blocks (64). The baffle plate four (63) is sleeved on the outer periphery of the rotating rod (65), and a torsion spring two (66) is sleeved on the outer periphery of the rotating rod (65). One end of the torsion spring two (66) is fixedly connected to the block (64), and the other end of the torsion spring two (66) is fixedly connected to the baffle plate four (63).

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