Constant temperature and humidity chamber
By adopting semiconductor refrigeration sheets and mobile racks in constant temperature and humidity chambers, the problem of low heating and humidification efficiency of existing constant temperature and humidity chambers is solved, and fast and uniform temperature and humidity control is achieved.
Patent Information
- Application Number
- CN202422517225.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-10-18
AI Technical Summary
The existing constant temperature and humidity chambers used in LED lamps have problems such as slow cooling speed and linear air supply in the air circulation system that cannot be heated and humidified quickly and evenly.
A constant temperature and humidity box is designed, and a semiconductor refrigeration sheet is used to achieve temperature adjustment work with the forward and reverse rotation of different fans and the deflection of the deflector, and uniform humidification and dehumidification work is achieved through the moving frame that moves up and down.
Fast and even temperature adjustment and humidity control are achieved, and the heating and humidification efficiency of the constant temperature and humidity chamber is improved.
Smart Images
Figure CN222922131U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of constant temperature and humidity boxes, and particularly relates to a constant temperature and humidity box. Background Technique
[0002] LED, a light-emitting diode, is a solid-state semiconductor device that can convert electrical energy into visible light. It can directly convert electricity into light and is often used as a lamp. The heart of an LED is a semiconductor chip. One end of the chip is attached to a bracket, one end is the negative pole, and the other end is connected to the positive pole of the power supply, so that the whole chip is encapsulated by epoxy resin. During the production process, in order to conduct simulation experiments on LED lights for quality inspection purposes, a constant temperature and humidity box is required. A constant temperature and humidity box is also called a constant temperature and humidity test chamber, a constant temperature and humidity testing machine, a constant temperature and humidity experimental box, a programmable damp heat alternating test chamber, and a constant temperature machine. It is a device used to detect the performance of materials in various environments and test the heat resistance, cold resistance, dry resistance, and wet resistance of various materials. It is suitable for quality inspection of products such as electronics, electrical appliances, mobile phones, communications, instruments, vehicles, plastic products, metals, foods, chemicals, building materials, medical care, and aerospace. The existing constant temperature and humidity boxes for LED lights are composed of two parts: temperature adjustment and humidity adjustment. The heating principle uses high-power resistance wires for heating. The required temperature is controlled by a temperature and humidity controller, and the temperature inside the box is sensed by a sensor. When the actual temperature is lower than the set temperature, the control signal starts the heating wire to work, and the heat balance effect is achieved through the air circulation system. The refrigeration method uses mechanical refrigeration, which is mainly composed of a compressor, a condenser, a throttling mechanism, and an evaporator to achieve the cooling effect. The humidification principle uses steam humidification. The controller controls the humidification amount, and the hot air is circulated through the air duct to reach the set humidity. When the existing constant temperature and humidity box for LED lights works, it uses resistance wire heating and compressor mechanical refrigeration, with a slow refrigeration speed. The air circulation system delivers air in a straight line and cannot quickly and evenly heat the inside of the box. The position of the steam nozzle is fixed and cannot quickly and evenly humidify and dehumidify the box. For this reason, we propose a constant temperature and humidity box. Content of the Utility Model
[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a constant temperature and humidity box with a uniform flow guiding device. The temperature adjustment work is realized by the cooperation of a semiconductor refrigeration sheet with the forward and reverse rotation of different fans and the deflection of the flow guiding sheet, and the uniform humidification and dehumidification work is realized by a moving frame that moves up and down, which can effectively solve the problems in the background technique.
[0004] To achieve the above purpose, the utility model provides the following technical scheme: a constant temperature and humidity box, comprising a box body, a temperature adjustment mechanism, and a humidity adjustment mechanism;
[0005] Box body: A box door is hinged to the front side thereof through a left hinge;
[0006] Temperature control mechanism: It includes a ventilation chamber, guide vanes, gears, rack plates, and flow blocking vanes. The ventilation chambers are all opened in the middle of the top wall of the box body. The guide vanes are all rotatably connected to the lower end inside the middle ventilation chamber. The gears are all arranged on the right side of the guide vanes. The rack plates are slidably connected to the lower right end of the middle ventilation chamber. The gears are all meshed with the rack plates. The flow blocking vanes are respectively arranged in the middle of the left and right ventilation chambers, and the flow blocking vanes are distributed in a front-back staggered manner, providing a guiding effect for the air and making the air distribution more uniform;
[0007] Humidity control mechanism: It is arranged inside the box body and is provided with a uniform flow guiding device. The temperature control work is realized by the positive and negative rotation of different fans and the deflection of the guide vanes in cooperation with the semiconductor refrigeration sheet, and the uniform humidification and dehumidification work is realized by the moving frame that moves up and down.
[0008] Furthermore, the temperature control mechanism further includes a circulation fan one, a circulation fan two, and a diversion chamber. The circulation fan one is arranged at the lower end of the middle ventilation chamber. Uniformly distributed heating wires are arranged in the middle of the middle ventilation chamber. The input end of the heating wire is electrically connected to the output end of the single-chip microcomputer. The circulation fan two is respectively arranged at the upper ends of the left and right ventilation chambers. The input ends of the circulation fan one and the circulation fan two are both electrically connected to the output end of the single-chip microcomputer. The diversion chambers are respectively arranged in the middle of the left and right sides of the box body, and the diversion chambers are all communicated with the vertically adjacent ventilation chambers, providing a basis for the circulation of air.
[0009] Furthermore, the temperature control mechanism further includes semiconductor refrigeration sheets. Installation grooves are respectively opened above the left and right sides of the box body, and semiconductor refrigeration sheets are arranged inside the installation grooves. The input ends of the semiconductor refrigeration sheets are all electrically connected to the output end of the single-chip microcomputer. The side of the semiconductor refrigeration sheet close to the middle of the box body is the refrigeration end, and the side of the semiconductor refrigeration sheet far from the middle of the box body is the heat dissipation end. The refrigeration ends of the semiconductor refrigeration sheets are all attached to the side of the flow blocking vane on the same side far from the middle of the box body, providing a basis for the rapid adjustment of temperature.
[0010] Furthermore, the humidity control mechanism includes guide columns, a moving frame, an evaporation chamber, heating plates, and electromagnetic three-way valves. The guide columns are respectively arranged at the four corners inside the box body. A moving frame is slidably connected between the four guide columns. Uniformly distributed spray heads are arranged in the middle of the inner wall of the moving frame. The evaporation chambers are respectively opened on the left and right sides at the rear end of the top wall of the box body. The heating plates are all arranged in the middle of the bottom wall of the evaporation chamber. The input end of the heating plate is electrically connected to the output end of the single-chip microcomputer. The electromagnetic three-way valve is arranged at the upper middle of the rear side wall of the box body. The input end of the electromagnetic three-way valve is electrically connected to the output end of the single-chip microcomputer. The evaporation chambers are all communicated with the electromagnetic three-way valve through connecting pipes one, and the electromagnetic three-way valve is communicated with the moving frame through connecting pipes two, providing a basis for the generation and release of steam.
[0011] Further, the humidity control mechanism further includes an air extraction pump, which is arranged at the lower end inside the box body. The input end of the air extraction pump is electrically connected to the output end of the single-chip microcomputer. The air extraction pump is communicated with the electromagnetic three-way valve through the third connecting pipe, providing a basis for the dehumidification work.
[0012] Further, the humidity control mechanism further includes a driving assembly, which includes a lead screw, a motor, a rotating shaft, a worm and a worm gear. The lead screw is rotatably connected to the rear end on the right side inside the box body. The outer surface of the lead screw is threadedly connected to the right side inside the moving frame. The motor is arranged at the upper end of the right side wall of the box body. The input end of the motor is electrically connected to the output end of the single-chip microcomputer. The rotating shaft is arranged at the left end of the output shaft of the motor. A worm is arranged on the left side of the rotating shaft. The worm gear is arranged at the upper end of the outer surface of the lead screw. The worm is meshed with the worm gear, providing stable drive for the uniform distribution of steam.
[0013] Further, the driving assembly further includes a reduction box, which is arranged at the right end of the rear side wall of the box body. The right end of the reduction shaft of the reduction box is fixedly connected to the left end of the worm. A connecting gear is arranged at the left end of the output shaft of the reduction box. The connecting gear is meshed with the rack plate, providing stable drive for the uniform distribution of air flow.
[0014] Further, the humidity control mechanism further includes a temperature sensor and a humidity sensor. The temperature sensor is arranged on the left side of the bottom wall of the box body. The humidity sensor is arranged on the right side of the bottom wall of the box body. The temperature sensor and the humidity sensor are both bidirectionally electrically connected to the single-chip microcomputer, providing a basis for the monitoring of temperature and humidity.
[0015] Further, it further includes a single-chip microcomputer, which is arranged in the middle of the front end of the box door. The input end of the single-chip microcomputer is electrically connected to an external power supply, providing a control effect for temperature adjustment and humidity adjustment work.
[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: This constant temperature and humidity box has the following advantages:
[0017] 1. The single-chip microcomputer controls the operation of the motor. The motor drives the rack plate to move through the connecting gear, and the gear rotates through the meshing action, thereby changing the deflection angle of the guide vane. The air flow direction is changed by the deflection of the guide vane, realizing rapid and uniform temperature adjustment.
[0018] 2. The meshing of the worm and the worm gear drives the lead screw to rotate. The moving frame is threadedly connected to the lead screw, and the rotating lead screw causes the moving frame to displace, thereby changing the height of the nozzle, and further realizing uniform humidification and dehumidification. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic structural diagram of the present utility model;
[0020] Figure 2 is a schematic cross-sectional structural diagram of the temperature adjustment mechanism and the humidity control mechanism of the present utility model;
[0021] Figure 3 This is a schematic structural diagram of the temperature regulating mechanism of the present utility model.
[0022] In the figure: 1 box body, 2 box door, 3 temperature regulating mechanism, 31 ventilation cavity, 32 guide vane, 33 gear, 34 rack plate, 35 flow blocking piece, 36 circulation fan I, 37 circulation fan II, 38 semiconductor refrigeration sheet, 39 diversion chamber, 4 humidity regulating mechanism, 41 guide post, 42 moving frame, 43 evaporation chamber, 44 heating plate, 45 electromagnetic three-way valve, 46 air extraction pump, 47 drive assembly, 471 lead screw, 472 motor, 473 rotating shaft, 474 worm, 475 worm gear, 476 reduction box, 48 temperature sensor, 49 humidity sensor, 5 single-chip microcomputer. Specific embodiments
[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0024] Please refer to Figures 1-3 , this embodiment provides a technical solution: a constant temperature and humidity box, including a box body 1, a temperature regulating mechanism 3 and a humidity regulating mechanism 4;
[0025] Box body 1: Its front side is hinged with a box door 2 through a left hinge. There is a glass window above the middle of the front end of the box door 2. It also includes a single-chip microcomputer 5, which is arranged in the middle of the front end of the box door 2. The input end of the single-chip microcomputer 5 is electrically connected to an external power supply to provide control effects for temperature regulation and humidity regulation work;
[0026] Temperature adjustment mechanism 3: It includes a ventilation chamber 31, guide vanes 32, gears 33, rack plates 34 and baffle plates 35. The ventilation chambers 31 are all opened in the middle of the top wall of the box body 1. The guide vanes 32 are all rotatably connected to the lower end inside the middle ventilation chamber 31. The gears 33 are all arranged on the right side of the guide vanes 32. The rack plates 34 are slidably connected to the lower right end of the middle ventilation chamber 31. The gears 33 are all meshed with the rack plates 34. The baffle plates 35 are respectively arranged in the middle of the left and right ventilation chambers 31. The baffle plates 35 are made of copper, with high conductivity. The baffle plates 35 are distributed in a staggered front and back manner, providing a guiding effect for the air and making the air distribution more uniform. The temperature adjustment mechanism 3 also includes a first circulation fan 36, a second circulation fan 37 and a diversion chamber 39. The first circulation fan 36 is arranged at the lower end of the middle ventilation chamber 31. Inside the middle ventilation chamber 31, evenly distributed heating wires are provided. The input end of the heating wire is electrically connected to the output end of the single-chip microcomputer 5. The second circulation fans 37 are respectively arranged at the upper ends of the left and right ventilation chambers 31. The input ends of the first circulation fan 36 and the second circulation fan 37 are both electrically connected to the output end of the single-chip microcomputer 5. The diversion chambers 39 are respectively arranged in the middle of the left and right sides of the box body 1. The diversion chambers 39 are all connected to the vertically adjacent ventilation chambers 31, providing a basis for the circulation of air. The temperature adjustment mechanism 3 also includes a semiconductor refrigeration chip 38. Installation grooves are opened above the left and right sides of the box body 1. The semiconductor refrigeration chips 38 are all arranged inside the installation grooves. The input ends of the semiconductor refrigeration chips 38 are all electrically connected to the output end of the single-chip microcomputer 5. The side of the semiconductor refrigeration chip 38 close to the middle of the box body 1 is the refrigeration end, and the side of the semiconductor refrigeration chip 38 far from the middle of the box body 1 is the heat dissipation end. The refrigeration ends of the semiconductor refrigeration chips 38 are all attached to the side of the baffle plate 35 on the same side far from the middle of the box body 1, providing a basis for the rapid adjustment of temperature;
[0027] Humidifying and dehumidifying mechanism 4: It is arranged inside the box body 1. The humidifying and dehumidifying mechanism 4 includes guide columns 41, a moving frame 42, an evaporation chamber 43, a heating plate 44, and an electromagnetic three-way valve 45. The guide columns 41 are respectively arranged at the four corners inside the box body 1. A moving frame 42 is slidably connected between the four guide columns 41. Nozzles are evenly distributed in the middle of the inner wall of the moving frame 42. The evaporation chambers 43 are respectively opened on the left and right sides at the rear end of the wall body of the top wall of the box body 1. The heating plates 44 are all arranged in the middle of the bottom wall of the evaporation chamber 43. The input end of the heating plate 44 is electrically connected to the output end of the single-chip microcomputer 5. The electromagnetic three-way valve 45 is arranged at the upper middle part of the rear side wall of the box body 1. The input end of the electromagnetic three-way valve 45 is electrically connected to the output end of the single-chip microcomputer 5. The evaporation chambers 43 are all connected to the electromagnetic three-way valve 45 through a first connecting pipe. The electromagnetic three-way valve 45 is connected to the moving frame 42 through a second connecting pipe, providing a basis for the generation and release of steam. The humidifying and dehumidifying mechanism 4 further includes an air extraction pump 46. The air extraction pump 46 is arranged at the lower end inside the box body 1. The input end of the air extraction pump 46 is electrically connected to the output end of the single-chip microcomputer 5. The air extraction pumps 46 are all connected to the electromagnetic three-way valve 45 through a third connecting pipe, providing a basis for the dehumidifying work. The humidifying and dehumidifying mechanism 4 further includes a driving component 47. The driving component 47 includes a lead screw 471, a motor 472, a rotating shaft 473, a worm 474, and a worm gear 475. The lead screw 471 is rotatably connected to the rear end on the right side inside the box body 1. The outer surface of the lead screw 471 is threadedly connected to the inside right side of the moving frame 42. The motor 472 is arranged at the upper end of the right side wall of the box body 1. The input end of the motor 472 is electrically connected to the output end of the single-chip microcomputer 5. The rotating shaft 473 is arranged at the left end of the output shaft of the motor 472. A worm 474 is arranged on the left side of the rotating shaft 473. The worm gear 475 is arranged at the upper end of the outer surface of the lead screw 471. The worm 474 is meshed with the worm gear 475, providing stable drive for the uniform distribution of steam. The driving component 47 further includes a reduction gearbox 476. The reduction gearbox 476 is arranged at the right end of the rear side wall of the box body 1. The right end of the reduction shaft of the reduction gearbox 476 is fixedly connected to the left end of the worm 474. A connecting gear is arranged at the left end of the output shaft of the reduction gearbox 476. The connecting gear is meshed with the rack plate 34, providing stable drive for the uniform distribution of air flow. The humidifying and dehumidifying mechanism 4 further includes a temperature sensor 48 and a humidity sensor 49. The temperature sensor 48 is arranged on the left side of the bottom wall of the box body 1. The humidity sensor 49 is arranged on the right side of the bottom wall of the box body 1. The temperature sensor 48 and the humidity sensor 49 are both bidirectionally electrically connected to the single-chip microcomputer 5, providing a basis for the monitoring of temperature and humidity. A uniform flow guiding device is provided. The temperature adjustment work is realized by the cooperation of the semiconductor refrigeration sheet 38 with the forward and reverse rotations of different fans and the deflection of the flow guiding sheet 32. The uniform humidifying and dehumidifying work is realized by the moving frame 42 that moves up and down.
[0028] The working principle of a constant temperature and humidity chamber provided by the present utility model is as follows: When conducting a simulation experiment of an LED lamp, open the chamber door 2, place the LED lamp inside the chamber body 1, and then close the chamber door 2. The temperature sensor 48 detects the temperature inside the chamber body 1. When the temperature is lower than the set temperature, heating work needs to be carried out. The temperature sensor 48 sends an electrical signal to the single-chip microcomputer 5, and the single-chip microcomputer 5 controls the heating wire, the first circulation fan 36, and the second circulation fan 37 to work. The heating wire generates heat, the first circulation fan 36 rotates forward, and the first circulation fan 36 sucks in external air. When the air passes through the heating wire, the air is heated by the heating wire to form hot air, and then is sent into the chamber body 1 through the first circulation fan 36. At the same time, the two second circulation fans 37 rotate reversely, and the air inside the chamber body 1 is pumped out of the chamber body 1 through the diversion chamber 39. Meanwhile, the single-chip microcomputer 5 controls the operation of the motor 472. The output shaft of the motor 472 drives the rotating shaft 473 and the worm 474 to rotate forward. Through the deceleration of the speed reducer 476, the rotational speed of the output shaft of the speed reducer 476 becomes slower, driving the connecting gear to rotate. Since the gears 33 are all meshed and connected with the rack plate 34, as the connecting gear rotates, the rack plate 34 moves forward, the gears 33 rotate, driving the guide vane 32 to deflect backward until the guide vane 32 deflects backward by a certain angle. Then the motor 472 drives the worm 474 to rotate reversely, driving the guide vane 32 to deflect forward through the meshing of the gear set. In this way, the deflecting guide vane 32 can change the direction of the hot air, enabling the hot air to quickly and evenly fill the inside of the chamber body 1. When the temperature is higher than the set temperature, cooling work needs to be carried out. The temperature sensor 48 sends an electrical signal to the single-chip microcomputer 5, and the single-chip microcomputer 5 controls the first circulation fan 36, the second circulation fan 37, and the semiconductor refrigeration sheet 38 to work. The refrigerating end of the semiconductor refrigeration sheet 38 starts to refrigerate, and then conducts the cold to the copper baffle 35, and the baffle 35 also becomes cold. The heat dissipation end of the semiconductor refrigeration sheet 38 dissipates the heat outside the chamber body 1. At this time, the second circulation fan 37 rotates forward, and the second circulation fan 37 sucks in external air. When the air passes through the baffle 35, the staggered baffle 35 makes the residence time of the air longer, and the air is cooled better and faster, and then forms cold air and enters the chamber body 1 through the diversion chamber 39. At the same time, the first circulation fan 36 rotates reversely, sucking out the air inside the chamber body 1, so that the air inside the chamber body 1 drops faster. When humidification work needs to be carried out, the single-chip microcomputer 5 controls the heating plate 44 to work, and the heating plate 44 emits a large amount of heat. At this time, the external water pump pumps water into the evaporation chamber 43. When the water falls on the surface of the heating plate 44, the high-temperature heating plate 44 makes the water quickly evaporate to form water vapor. The single-chip microcomputer 5 controls the electromagnetic three-way valve 45 to work, so that the evaporation chamber 43 is connected to the moving frame 42 through the electromagnetic three-way valve 45. As the water vapor continues to form, the pressure inside the evaporation chamber 43 increases, causing the water vapor to slowly move towards the moving frame 42 and then spray out from the nozzle. Meanwhile, the single-chip microcomputer 5 controls the operation of the motor 472. The motor 472 drives the worm 474 to rotate forward. Through the meshing of the worm 474 and the worm gear 475, the worm gear 475 also rotates synchronously, driving the lead screw 471 to rotate synchronously.Since the outer surface of the lead screw 471 is threadedly connected to the inner right side of the moving frame 42, as the lead screw 471 rotates, the moving frame 42 will move downward along the four guide posts 41. The moving moving frame 42 makes the steam distribution more uniform. When the moving frame 42 moves down to a suitable position, the motor 472 drives the worm 474 to reverse, driving the lead screw 471 to rotate synchronously, and the moving frame 42 moves upward. In this way, through the deceleration of the reduction gearbox 476, when the moving frame 42 moves down to a suitable position, the guide vane 32 also just deflects backward to the maximum angle, and then the next cycle is carried out. When dehumidification work needs to be carried out, the single-chip microcomputer 5 controls the electromagnetic three-way valve 45 to work, so that the air extraction pump 46 is connected to the moving frame 42 through the electromagnetic three-way valve 45. The single-chip microcomputer 5 controls the air extraction pump 46 to work, and the air extraction pump 46 extracts the steam inside the box body 1. At the same time, the circulation fan one 36, the circulation fan two 37 and the semiconductor refrigeration sheet 38 cooperate with each other to make the dehumidification work proceed faster.
[0029] It should be noted that, in the above embodiments, the single-chip microcomputer 5 disclosed is an S7-200 single-chip microcomputer, the heating wire is a Ni80Cr20 heating wire, the circulation fan one 36 and the circulation fan two 37 are both BT35 circulation fans, the semiconductor refrigeration sheet 38 is an FPH1-95102T1 refrigeration sheet, the heating plate 44 is a YKJRB-210325 heating plate, the electromagnetic three-way valve 45 is an ESM-3301-44-H-N-XX electromagnetic three-way valve, the air extraction pump 46 is a 2RB510-7AA11 air extraction pump, the motor 472 is a 4RK25GN-CM motor, the temperature sensor 48 is an HZ_TEM01 temperature sensor, the humidity sensor 49 is a PT500-118 humidity sensor. The single-chip microcomputer 5 controls the heating wire, the circulation fan one 36, the circulation fan two 37, the semiconductor refrigeration sheet 38, the heating plate 44, the electromagnetic three-way valve 45, the air extraction pump 46, the motor 472, the temperature sensor 48 and the humidity sensor 49 to work by using the commonly used methods in the prior art.
[0030] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be included in the patent protection scope of the present invention by the same token.
Claims
1. A constant temperature and humidity chamber, characterized in that: It comprises a box body (1), a temperature adjustment mechanism (3) and a humidity adjustment mechanism (4); Box body (1): a box door (2) is hingedly connected to the front side of the box body via a left hinge; The temperature regulating mechanism (3) comprises a ventilation cavity (31), a guide plate (32), a gear (33), a rack plate (34) and a spoiler (35), wherein the ventilation cavity (31) is provided in the middle of the top wall of the box body (1), the guide plates (32) are rotatably connected to the lower end of the ventilation cavity (31) in the middle, the gears (33) are arranged on the right side of the guide plates (32), the rack plates (34) are slidably connected to the lower end of the right side of the ventilation cavity (31) in the middle, the gears (33) are meshedly connected to the rack plate (34), the spoilers (35) are respectively arranged in the middle of the ventilation cavities (31) on the left and right sides, and the spoilers (35) are staggered in the front and back directions; Humidity control mechanism (4): it is arranged inside the box body (1).
2. A constant temperature and humidity chamber according to claim 1, characterized in that: It also comprises a single-chip microcomputer (5), which is arranged at the middle of the front end of the cabinet door (2), and an input end of the single-chip microcomputer (5) is electrically connected to an external power supply.
3. A constant temperature and humidity chamber according to claim 2, characterized in that: The temperature control mechanism (3) further comprises a circulation fan 1 (36), a circulation fan 2 (37) and a guide chamber (39); the circulation fan 1 (36) is arranged at the lower end of the central ventilation cavity (31); a uniformly distributed heating wire is arranged in the middle of the central ventilation cavity (31); the input end of the heating wire is electrically connected to the output end of the single chip computer (5); the circulation fan 2 (37) is arranged at the upper end of the ventilation cavity (31) on the left and right sides respectively; the input ends of the circulation fan 1 (36) and the circulation fan 2 (37) are both electrically connected to the output end of the single chip computer (5); the guide chamber (39) is arranged at the middle of the left and right sides of the box body (1); and the guide chamber (39) is communicated with the vertically adjacent ventilation cavity (31).
4. A constant temperature and humidity chamber according to claim 3, characterized in that: The temperature control mechanism (3) further comprises a semiconductor cooling sheet (38). Mounting grooves are provided above both left and right sides of the box body (1). Semiconductor cooling sheets (38) are provided inside the mounting grooves. The input ends of the semiconductor cooling sheets (38) are electrically connected to the output ends of the single-chip computer (5). The side of the semiconductor cooling sheet (38) close to the middle of the box body (1) is a cooling end. The side of the semiconductor cooling sheet (38) away from the middle of the box body (1) is a heat dissipation end. The cooling ends of the semiconductor cooling sheets (38) are in contact with the side of the baffle (35) located on the same side away from the middle of the box body (1).
5. A constant temperature and humidity chamber according to claim 4, characterized in that: The humidity control mechanism (4) comprises a guide column (41), a movable frame (42), an evaporation chamber (43), a heating plate (44) and an electromagnetic three-way valve (45); the guide columns (41) are respectively arranged at four corners inside the box body (1); a movable frame (42) is slidably connected between the four guide columns (41); uniformly distributed nozzles are arranged at the middle of the inner wall of the movable frame (42); the evaporation chamber (43) is respectively opened at the left and right sides of the rear end of the wall of the top wall of the box body (1); The heating plates (44) are arranged at the middle of the bottom wall of the evaporation chamber (43), the input end of the heating plates (44) is electrically connected to the output end of the single-chip computer (5), the electromagnetic three-way valve (45) is arranged at the middle upper end of the rear side wall of the box body (1), the input end of the electromagnetic three-way valve (45) is electrically connected to the output end of the single-chip computer (5), the evaporation chamber (43) is connected to the electromagnetic three-way valve (45) through a connecting pipe 1, and the electromagnetic three-way valve (45) is connected to the movable frame (42) through a connecting pipe 2.
6. A constant temperature and humidity chamber according to claim 5, characterized in that: The humidity control mechanism (4) further comprises an air pump (46), the air pump (46) being arranged at the lower end of the interior of the box body (1), the input end of the air pump (46) being electrically connected to the output end of the single-chip computer (5), and the air pump (46) being connected to the electromagnetic three-way valve (45) via a connecting pipe three.
7. A constant temperature and humidity chamber according to claim 5, characterized in that: The humidity control mechanism (4) further comprises a driving assembly (47), the driving assembly (47) comprising a screw (471), a motor (472), a rotating shaft (473), a worm (474) and a worm wheel (475), the screw (471) being rotatably connected to the rear end of the right side of the interior of the housing (1), the outer surface of the screw (471) being threadedly connected to the right side of the interior of the moving frame (42), the motor (472) being arranged at the upper end of the right side wall of the housing (1), the input end of the motor (472) being electrically connected to the output end of the single-chip computer (5), the rotating shaft (473) being arranged at the left end of the output shaft of the motor (472), the worm (474) being arranged on the left side of the rotating shaft (473), the worm wheel (475) being arranged at the upper end of the outer surface of the screw (471), and the worm (474) being meshingly connected to the worm wheel (475).
8. A constant temperature and humidity chamber according to claim 7, characterized in that: The driving assembly (47) further comprises a reduction box (476), wherein the reduction box (476) is arranged at the right end of the rear side wall of the housing (1), the right end of a reduction shaft of the reduction box (476) is fixedly connected to the left end of the worm (474), and the left end of an output shaft of the reduction box (476) is provided with a connecting gear, which is meshingly connected to the rack plate (34).
9. A constant temperature and humidity chamber according to claim 7, characterized in that: The humidity control mechanism (4) further comprises a temperature sensor (48) and a humidity sensor (49); the temperature sensor (48) is arranged on the left side of the bottom wall of the box body (1); the humidity sensor (49) is arranged on the right side of the bottom wall of the box body (1); and both the temperature sensor (48) and the humidity sensor (49) are bidirectionally electrically connected to the single-chip computer (5).