High and low temperature performance test chamber based on mixed refrigerant and control method

Abstract

The present invention discloses a high and low temperature performance test chamber based on a mixed refrigerant and a control method thereof, including a box body, a refrigeration chamber, a heating chamber, an electric refrigeration device, an electric heating device, and a support roller. A refrigeration chamber penetrating forward is provided at the upper part of the box body, and a heating chamber penetrating forward is provided at the bottom. An electric refrigeration device is installed in the refrigeration chamber, and the electric refrigeration device uses a mixed refrigerant for refrigeration. An electric heating device is installed in the heating chamber. When the temperature is tested in the present invention, the heat-conducting oil in the heat preservation tank is made to flow back into the heat dissipation pipe by controlling the lifting mechanism to rise, and then the electric control stop valve is controlled to cut off, and the electric heating device and the electric refrigeration device are controlled to be powered on for operation. At this time, the heat-conducting oil in the heat dissipation pipe can absorb the heat generated by the electric heating device, but the heat will not be dissipated to the outside to cause waste, but is retained in the heating chamber to heat the object to be tested.

Description

Technical Field

[0001] The present invention relates to the field of temperature testing, and particularly to a high and low temperature performance test chamber based on a mixed refrigerant and a control method thereof. Background Art

[0002] A mixed refrigerant is formed by mixing multiple single refrigerants in a certain proportion. Compared with a single type of refrigerant, it has better heat exchange performance and is more environmentally friendly. When the existing temperature test device conducts a temperature test, it usually consumes electrical energy for heating and cooling. After the test is completed, most of the heat generated by heating is directly discharged and lost, and cannot be used for the next time. When used next time, heating needs to be carried out again, resulting in large energy consumption and lack of energy conservation, highlighting the deficiencies of the existing technology. Summary of the Invention

[0003] The purpose of the present invention is to provide a high and low temperature performance test chamber based on a mixed refrigerant and a control method thereof, so as to solve the technical problem of insufficient energy conservation of traditional temperature test devices.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A high and low temperature performance test chamber based on a mixed refrigerant includes a box body, a refrigeration chamber, a heating chamber, an electric refrigeration device, an electric heating device, and a support roller. The upper part of the box body is provided with a refrigeration chamber penetrating forward, and the bottom is provided with a heating chamber penetrating forward. The electric refrigeration device is installed in the refrigeration chamber, and the electric refrigeration device uses a mixed refrigerant for refrigeration. The electric heating device is installed in the heating chamber. The middle part of the box body is hermetically and rotatably connected with a support roller in the left-right horizontal direction, and a reduction motor with a braking function is fixed at the left end. Radial receiving grooves are respectively opened in the upper and lower parts of the support roller and are coaxially fixed with the rotating shaft of the reduction motor. When the support roller rotates to a certain angle, the two receiving grooves can be respectively communicated with the heating chamber and the refrigeration chamber, and the middle part is closed. Horizontally arranged trays are respectively rotatably connected in the two receiving grooves in the left-right direction. The trays are equipped with a horizontal maintenance mechanism. A plurality of heat dissipation tubes are arranged at the bottom of the heating chamber. A lifting mechanism is installed on the right part of the box body, and a box door that can be hermetically locked is installed at the front. The lifting mechanism controls the lifting of a heat preservation tank. An electric control stop valve is installed at the lower right part of the box body. The left port of the electric control stop valve is communicated with each heat dissipation tube through a surplus heat-resistant hose, and the right port is communicated with the lower part of the heat preservation tank through a surplus hose. The heat preservation tank is equipped with a waterproof electric heater and stores heat conduction oil inside. The heating end of the electric heater is located inside the heat preservation tank. A controller is fixed on the box body. The controller, the electric refrigeration device, the electric heating device, the reduction motor, the electric control stop valve, and the electric heater are electrically connected.

[0006] Based on the above technical solution, the lifting mechanism includes an outer support frame, a servo motor, a lifting frame, and a lead screw. A vertical outer support frame is fixed to the right end of the box body. The top of the outer support frame is fixed with a vertical servo motor, and is connected to the lifting frame in a vertically sliding manner. The rotating shaft of the servo motor is coaxially fixed with a vertical lead screw, and is electrically connected to the controller. The lead screw is rotationally connected to the lifting frame and is threadedly connected to the lifting frame. The heat preservation tank is fixed to the bottom of the lifting frame in the front-back direction. The lower front part of the heat preservation tank is communicated with the port on the right of the electric control stop valve through the surplus hose.

[0007] Based on the above technical solution, a swing frame is hinged to the bottom of the box body. The swing frame can swing left and right and is located in the heating chamber. The heat dissipation pipe includes a main heat dissipation pipe and a secondary heat dissipation pipe. The main heat dissipation pipe is inserted and fixed to the swing frame in the left-right direction. The right parts of the main heat dissipation pipes are fixedly communicated through the secondary heat dissipation pipes. The front part of the secondary heat dissipation pipe is communicated with the port on the left of the electric control stop valve through the surplus heat-resistant hose. A swing arm is fixed to the rear part of the swing frame. The swing arm is radially arranged with respect to the virtual axis of the swing frame. A tension spring is fixed to the top of the swing arm. A horizontal support arm is fixed to the rear end of the box body. The bottom end of the support arm is fixed to the top end of the tension spring. The swing frame has a tendency to tilt downward to the left under the elastic tension of the tension spring. A pressing arm is fixed to the rear part of the lifting frame. The pressing arm can press the support arm downward to make the swing frame tilt downward to the right.

[0008] Based on the above technical solution, a horizontal inner support frame is fixed in the heating chamber. A plurality of horizontal rotating frames are rotationally connected to the inner support frame in the front-back direction. A first gear is respectively fixed to the rear part of each rotating frame. The first gear is coaxially arranged with respect to the virtual axis of the rotating frame. The electric heating device is an electric heating rod. A heat reflecting plate in a roof shape is fixed to the upper part of the rotating frame in the front-back direction. The reflecting surface of the heat reflecting plate faces the electric heating rod. The electric heating rod is fixed to the bottom of the rotating frame in the front-back direction. A double-sided rack is slidably connected to the left and right in the rear part of the heating chamber. Tooth structures are provided on both the upper and lower parts of the double-sided rack. A second gear is fixed to the rear part of the swing frame. The second gear is coaxially arranged with respect to the virtual axis of the swing frame. The first gear meshes with the bottom of the double-sided rack, and the upper part of the double-sided rack meshes with each second gear. When the swing frame swings left and right, each rotating frame can be rotated forward and backward through the first gear, the double-sided rack, and the second gear.

[0009] On the basis of the above technical solution, a horizontal sliding frame is slidably connected up and down in the heating chamber. The electric heating device is an electric heating rod, and the electric heating rod is inserted and fixed to the sliding frame. Vertical lifting racks are respectively fixed to the front and rear parts of the sliding frame, and third gears are respectively fixed to the front and rear parts of the swing frame. The two third gears are coaxially arranged relative to the virtual axis of the swing frame, and the right parts of the two third gears are respectively engaged with the two lifting racks.

[0010] On the basis of the above technical solution, the horizontal maintaining mechanism includes support cylinders, transmission shafts, first sprockets, second sprockets, and chains. Support cylinders are respectively fixed to the left and right parts of the box body along the left and right horizontal directions. The two support cylinders are coaxially rotatably connected to the left and right parts of the support roller respectively. A transmission shaft coaxial with the virtual rotation axis of the tray is fixed to the bottom of the tray, and the tray is rotatably connected to the support roller by means of the transmission shaft. First sprockets are respectively coaxially fixed to the right parts of the two transmission shafts. Two second sprockets are coaxially fixed to the support cylinder on the right part of the box body. The two first sprockets and the two second sprockets jointly engage two chains. The two transmission shafts are in a transmission connection with a transmission ratio of 1:1 with the support cylinder on the right part of the box body through the meshing of the first sprockets, second sprockets, and chains. The left and right parts of the support roller and the left and right parts of the box body form a sealed cavity, and the support cylinders, first sprockets, second sprockets, and chains are all located in the cavity.

[0011] On the basis of the above technical solution, the horizontal maintaining mechanism includes support cylinders, transmission shafts, support shafts, fifth gears, sixth gears, and fourth gears. Support cylinders are respectively fixed to the left and right parts of the box body along the left and right horizontal directions. The two support cylinders are coaxially rotatably connected to the left and right parts of the support roller respectively. A transmission shaft coaxial with the virtual rotation axis of the tray is fixed to the bottom of the tray, and the tray is rotatably connected to the support roller by means of the transmission shaft. Horizontal support shafts are respectively rotatably connected to the upper right part and the lower right part of the support roller along the left and right directions. Fifth gears are respectively coaxially fixed to the two support shafts. Fourth gears are respectively coaxially fixed to the right parts of the two transmission shafts. A sixth gear is coaxially fixed to the support cylinder on the right part of the box body. The two transmission shafts are in a transmission connection with a transmission ratio of 1:1 with the support cylinder through the meshing of the fourth gears, fifth gears, and sixth gears. The left and right parts of the support roller and the left and right parts of the box body form a sealed cavity, and the support cylinders, fifth gears, sixth gears, and fourth gears are all located in the cavity.

[0012] On the basis of the above technical solution, for the control method of a high and low temperature test chamber based on a mixed refrigerant, the control method includes the following steps:

[0013] Step 101: Before use, control the lifting mechanism and the electric control stop valve to make the height of the heat preservation tank drop below the heat dissipation pipe. At this time, the heat-conducting oil flows back into the heat preservation tank through the electric control stop valve. Then, close the electric control stop valve and turn on the electric heater to heat the heat-conducting oil.

[0014] Step 102: Open the box door. By controlling the reduction motor to rotate, make the two receiving grooves communicate with the heating chamber and the refrigerating chamber respectively. Then, place the object to be tested on the upper tray. Then, control the supporting roller to rotate half a turn, so as to place the second object to be tested on the other tray.

[0015] Step 103: Close the box door. Then, control the lifting mechanism and the electric control stop valve to make the height of the heat preservation tank rise above the heat dissipation pipe. At this time, the heat-conducting oil flows back into the heat dissipation pipe through the electric control stop valve. Then, close the electric control stop valve and the electric heater, and turn on the electric refrigeration device and the electric heating device to heat and refrigerate the refrigerating chamber and the heating chamber. Then, control the reduction motor to rotate to make the two receiving grooves communicate with the heating chamber or the refrigerating chamber, so as to be able to conduct high-temperature and low-temperature tests on the objects to be tested on the trays.

[0016] Step 104: After the test is completed, control the electric refrigeration device and the electric heating device to stop working. Then, control the lifting mechanism and the electric control stop valve again to make the height of the heat preservation tank drop below the heat dissipation pipe. At this time, the heat-conducting oil flows back into the heat preservation tank through the electric control stop valve. Then, close the electric control stop valve, so that the heat-conducting oil with remaining temperature can be stored in the heat preservation tank for heat preservation, thus achieving the heat preservation effect and facilitating the rapid heating of the heating chamber during the next test.

[0017] Step 105: Open the box door. When the temperatures of the refrigerating chamber and the heating chamber return to near the ambient temperature, by controlling the reduction motor to rotate, make the two receiving grooves communicate with the heating chamber and the refrigerating chamber respectively. Then, take out the object to be tested from the tray. Then, control the supporting roller to rotate half a turn, so as to take out the second object to be tested from the other tray.

[0018] Compared with the prior art, the present invention has the following advantages: during the temperature test of the present invention, the heat transfer oil in the insulation tank is refluxed into the heat dissipation pipe by controlling the lifting mechanism to rise, and then the electric control stop valve is controlled to be cut off, and the electric heating device and the electric refrigeration device are controlled to be powered on to work. At this time, the heat transfer oil in the heat dissipation pipe can absorb the heat generated by the electric heating device, but the heat will not be dissipated to the outside to cause waste, but will be retained in the heating chamber to heat the tested object. When the test is completed, the electric control stop valve is controlled to be turned on first and then turned off. During this period, the lifting mechanism is controlled to descend to make the heat transfer oil in the insulation tank refluxed into the insulation tank, so that the heat transfer oil with residual temperature can be kept warm, which is convenient for it to reflux into the heat dissipation pipe to heat the heating chamber next time in a short time, and it is also convenient for the heating chamber to quickly heat up during the next test in a short time, thereby reducing the consumption of electric energy during the next test in a short time, and being more energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the axial side structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the right cross-section structure of the box body and the support rollers of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the first method for improving energy saving effect of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of the second method for improving energy saving effect of the present invention.

[0023] Figure 5 It is a schematic diagram of the rear structure of the present invention.

[0024] Figure 6 It is a schematic diagram of the composition of the first level maintaining mechanism of the present invention.

[0025] Figure 7 It is a schematic diagram of the composition of the second level maintaining mechanism of the present invention.

[0026] Figure 8 It is a schematic diagram of the axial structure of the box body of the present invention after right section.

[0027] In the figure: 1. Box body, 2. Refrigeration chamber, 3. Heating chamber, 4. Electric refrigeration device, 6. Support roller, 7. Reduction motor, 8. Accommodating groove, 9. Tray, 13. Box door, 14. Heat preservation tank, 15. Electric control stop valve, 16. Electric heater, 17. Controller, 18. Outer support frame, 19. Servo motor, 20. Lifting frame, 21. Lead screw, 22. Swing frame, 23. Main heat dissipation pipe, 24. Auxiliary heat dissipation pipe, 25. Swing arm, 26. Tension spring, 27. Support arm, 271. Pressing arm, 28. Inner support frame, 29. Rotating frame, 30. First gear, 31. Electric heating rod, 32. Heat reflecting plate, 33. Double-sided rack, 34. Second gear, 35. Sliding frame, 36. Lifting rack, 37. Third gear, 38. Support cylinder, 39. Transmission shaft, 40. First sprocket, 41. Second sprocket, 42. Chain, 431. Support shaft, 43. Fifth gear, 44. Sixth gear, 45. Fourth gear. Detailed implementation mode

[0028] The present invention will be further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] As Figures 1-8As shown in the figure, a high and low temperature performance test chamber based on a mixed refrigerant includes a box body 1, a refrigeration chamber 2, a heating chamber 3, an electric refrigeration device 4, an electric heating device, a support roller 6. A refrigeration chamber 2 penetrating forward is provided at the upper part of the box body 1, and a heating chamber 3 penetrating forward is provided at the bottom. An electric refrigeration device 4 is installed in the refrigeration chamber 2, and the electric refrigeration device 4 uses a mixed refrigerant for refrigeration. An electric heating device is installed in the heating chamber 3. A support roller 6 is hermetically and rotatably connected to the middle part of the box body 1 in the horizontal direction from left to right, and a reduction motor 7 with a braking function is fixed at the left end. Radial receiving grooves 8 are respectively opened at the upper and lower parts of the support roller 6 and are coaxially fixed with the rotating shaft of the reduction motor 7. When the support roller 6 rotates to a certain angle, the two receiving grooves 8 can be respectively communicated with the heating chamber 3 and the refrigeration chamber 2, and the middle part is closed. Horizontally arranged trays 9 are respectively rotatably connected in the two receiving grooves 8 in the left-right direction. A horizontal maintaining mechanism is installed on the tray 9. A plurality of heat dissipation pipes are arranged at the bottom of the heating chamber 3. A lifting mechanism is installed on the right part of the box body 1, and a box door 13 that can be hermetically locked is installed at the front. The lifting mechanism controls the lifting of a heat preservation tank 14. An electric control stop valve 15 is installed at the lower right part of the box body 1. The left port of the electric control stop valve 15 is communicated with each heat dissipation pipe through a surplus heat-resistant hose, and the right port is communicated with the lower part of the heat preservation tank 14 through a surplus hose. A waterproof electric heater 16 is installed on the heat preservation tank 14, and heat-conducting oil is stored inside. The heating end of the electric heater 16 is located inside the heat preservation tank 14. A controller 17 is fixed on the box body 1. The controller 17 is a known prior art, such as a single-chip microcomputer, a PLC or an industrial control computer, etc. The controller 17, the electric refrigeration device 4, the electric heating device, the reduction motor 7, the electric control stop valve 15, and the electric heater 16 are electrically connected.

[0030] During temperature testing, the heat-conducting oil in the heat preservation tank 14 is made to flow back into the heat dissipation pipes by controlling the lifting mechanism to rise. Then, the electric control stop valve 15 is controlled to close, and the electric heating device and the electric refrigeration device 4 are controlled to be powered on for operation. At this time, the heat-conducting oil in the heat dissipation pipes can absorb the heat generated by the electric heating device, but the heat will not be dissipated to the outside and wasted. Instead, it is retained in the heating chamber 3 to heat the object to be tested. After the test is completed, the electric control stop valve 15 is first controlled to open and then closed. During this period, the lifting mechanism is controlled to descend so that the heat-conducting oil in the heat preservation tank 14 flows back into the heat preservation tank 14, so that the heat-conducting oil with remaining temperature can be heat-preserved, which is convenient for flowing back into the heat dissipation pipes to heat the heating chamber 3 next time in a short time. At the same time, it is also convenient for the heating chamber 3 to quickly heat up during the next test in a short time, reducing the power consumption during the next test in a short time and being more energy-efficient.

[0031] The lifting mechanism includes an outer support frame 18, a servo motor 19, a lifting frame 20, and a lead screw 21. A vertical outer support frame 18 is fixed to the right end of the box body 1. The top of the outer support frame 18 is fixed with a vertical servo motor 19, and a lifting frame 20 is slidably connected up and down. The rotating shaft of the servo motor 19 is coaxially fixed with a vertical lead screw 21, and is electrically connected to the controller 17. The lead screw 21 is rotatably connected to the lifting frame 20, and the lead screw 21 is threadedly connected to the lifting frame 20. The heat preservation tank 14 is fixed to the bottom of the lifting frame 20 in the front-rear direction. The lower front part of the heat preservation tank 14 is connected and communicated with the port on the right part of the electric control stop valve 15 through the surplus hose.

[0032] Further, by controlling the servo motor 19 to rotate forward and backward, the lifting frame 20 can be moved up and down along the outer support frame 18 by using the threaded connection between the lead screw 21 and the lifting frame 20, so as to drive the heat preservation tank 14 to move up and down.

[0033] A swing frame 22 is hinged to the bottom of the box body 1. The swing frame 22 can swing left and right and is located in the heating chamber 3. The heat dissipation pipe includes a main heat dissipation pipe 23 and a secondary heat dissipation pipe 24. The main heat dissipation pipe 23 is inserted and fixed to the swing frame 22 in the left-right direction. The right parts of the main heat dissipation pipes 23 are fixedly communicated through the secondary heat dissipation pipes 24. The front part of the secondary heat dissipation pipe 24 is connected and communicated with the port on the left part of the electric control stop valve 15 through the surplus heat-resistant hose. A swing arm 25 is fixed to the rear part of the swing frame 22. The swing arm 25 is radially arranged with respect to the virtual axis of the swing frame 22. A tension spring 26 is fixed to the top of the swing arm 25. A horizontal support arm 27 is fixed to the rear end of the box body 1. The bottom end of the support arm 27 is fixed to the top end of the tension spring 26. The swing frame 22 has a tendency to tilt left and downward under the elastic tension of the tension spring 26. A pressing arm 271 is fixed to the rear part of the lifting frame 20. The pressing arm 271 can press the support arm 27 downward to make the swing frame 22 tilt right and downward.

[0034] Further, when the lifting frame 20 moves down and the heat preservation tank 14 moves below the heat dissipation pipe, the support arm 27 can press the pressing arm 271 downward, so that the swing frame 22 swings right and downward and tilts, and then the heat-conducting oil in the heat dissipation pipe can flow back into the heat preservation tank 14 faster, and at the same time reduce the residue; when the lifting frame 20 rises and the heat preservation tank 14 moves above the heat dissipation pipe, the support arm 27 is separated from the pressing arm 271. At this time, under the elastic tension of the tension spring 26, the swing arm 25 and the swing frame 22 rotate and tilt left and downward, so as to facilitate the heat-conducting oil in the heat preservation tank 14 to flow back into the heat dissipation pipe faster and facilitate the discharge of the bubbles in the heat dissipation pipe. The rapid reflux of the heat-conducting oil can reduce the heat dissipation and improve the working efficiency at the same time.

[0035] A horizontal inner support frame 28 is fixed inside the heating chamber 3. A plurality of horizontal rotating frames 29 are rotatably connected to the inner support frame 28 in the front-rear direction. A first gear 30 is fixed to the rear part of each rotating frame 29. The first gear 30 is coaxially arranged with respect to the virtual axis of the rotating frame 29. The electric heating device is an electric heating rod 31. A heat reflecting plate 32 in the shape of a roof is fixed to the upper part of the rotating frame 29 in the front-rear direction. The reflecting surface of the heat reflecting plate 32 faces the electric heating rod 31. The electric heating rod 31 is fixed to the bottom of the rotating frame 29 in the front-rear direction. A double-sided rack 33 is slidably connected to the left and right in the rear part of the heating chamber 3. Tooth structures are provided on both the upper and lower parts of the double-sided rack 33. A second gear 34 is fixed to the rear part of the swing frame 22. The second gear 34 is coaxially arranged with respect to the virtual axis of the swing frame 22. The first gear 30 meshes with the bottom of the double-sided rack 33. The upper part of the double-sided rack 33 meshes with each second gear 34. When the swing frame 22 swings left and right, the rotation of each rotating frame 29 can be achieved through the first gear 30, the double-sided rack 33, and the second gear 34.

[0036] Further, as a first structure for improving the energy-saving effect, when the swing frame 22 swings left and right, the rotation of each rotating frame 29 can be achieved through the second gear 34, the first gear 30, and the double-sided rack 33. Specifically, when the swing frame 22 tilts downward to the left, due to the rotation of the rotating frame 29, at this time, the electric heating rod 31 is above and the heat reflecting plate 32 is below. If heat-conducting oil is filled in the heat dissipation pipe at this time, the heat of the heat-conducting oil can be better dissipated upward to heat the heating chamber 3, and the heat generated when the electric heating rod 31 works can be better reflected by the heat reflecting plate 32 to heat the upper part of the heating chamber 3, that is, to heat the test object on the upper tray 9, and relatively reduce the heat dissipation downward, improving the utilization effect of heat and being more energy-saving; when the test is stopped, that is, when the swing frame 22 tilts downward to the right, due to the rotation of the rotating frame 29, at this time, the electric heating rod 31 is below and the heat reflecting plate 32 is above. At this time, the heat of the electric heating rod 31 can be better conducted downward into the heat dissipation pipe to heat the heat-conducting oil, that is, improving the utilization effect of the waste heat of the electric heating rod 31, being more energy-saving, and at the same time being able to reduce the heat directly conducted to the upper part of the heating chamber 3 (i.e., the test object), facilitating the rapid cooling of the test object.

[0037] A horizontal sliding frame 35 is slidably connected up and down inside the heating chamber 3. The electric heating device is an electric heating rod 31. The electric heating rod 31 is inserted and fixed to the sliding frame 35. A vertical lifting rack 36 is fixed to each of the front and rear parts of the sliding frame 35. A third gear 37 is fixed to each of the front and rear parts of the swing frame 22. The two third gears 37 are coaxially arranged with respect to the virtual axis of the swing frame 22. The right parts of the two third gears 37 respectively mesh with the two lifting racks 36.

[0038] Further, as a second structure for improving the energy-saving effect, when the swing frame 22 swings left and right, the sliding frame 35 can move up and down through the third gear 37 and the lifting rack 36. Specifically, when the swing frame 22 tilts downward to the left, the sliding frame 35 rises and gets closer to the receiving groove 8, so that the object to be tested can be heated more quickly, and at the same time, it is convenient for the object to be tested to absorb heat; when the swing frame 22 tilts downward to the right, the sliding frame 35 descends and gets closer to the heat dissipation pipe, so that the heat dissipation pipe can be heated more quickly, and at the same time, it is convenient for the heat-conducting oil to absorb the residual heat of the electric heating rod 31, improving the utilization efficiency of heat and the working efficiency, and being more energy-saving.

[0039] The horizontal maintenance mechanism includes a support cylinder 38, a transmission shaft 39, a first sprocket 40, a second sprocket 41, and a chain 42. On the left and right sides of the box body 1, a support cylinder 38 is fixed along the left and right horizontal directions. The two support cylinders 38 are respectively rotatably connected to the left and right parts of the support roller 6 coaxially. The bottom of the tray 9 is fixed with a transmission shaft 39 coaxial with its virtual rotation axis. The tray 9 is rotatably connected to the support roller 6 by means of the transmission shaft 39. On the right parts of the two transmission shafts 39, a first sprocket 40 is coaxially fixed respectively. Two second sprockets 41 are coaxially fixed to the support cylinder 38 on the right part of the box body 1. The two first sprockets 40 and the two second sprockets 41 jointly engage two chains 42. The two transmission shafts 39 are in a one-to-one transmission connection with the support cylinder 38 on the right part of the box body 1 through the meshing of the first sprocket 40, the second sprocket 41, and the chain 42. A sealed cavity is formed between the left and right parts of the support roller 6 and the left and right parts of the box body 1. The support cylinder 38, the first sprocket 40, the second sprocket 41, and the chain 42 are all located in the cavity.

[0040] Further, as a component of the first horizontal maintenance mechanism, when the support roller 6 rotates, the transmission shaft 39 follows the support roller 6 to make a circular motion, and at the same time, the transmission shaft 39 can be rotated under the one-to-one transmission of the first sprocket 40, the second sprocket 41, and the chain 42. For example, when the support roller 6 rotates clockwise for half a turn (observed from the right view angle), the transmission shaft 39 rotates counterclockwise for half a turn (observed from the right view angle), so that the tray 9 always maintains a horizontal state to stably lift the object on it, and then ensures the stability of the object during temperature testing.

[0041] The horizontal maintenance mechanism includes a support cylinder 38, a transmission shaft 39, a support shaft 431, a fifth gear 43, a sixth gear 44, and a fourth gear 45. On the left and right sides of the box body 1, a support cylinder 38 is fixed in the left-right horizontal direction. The two support cylinders 38 are rotatably connected to the left and right parts of the support roller 6 coaxially. The bottom of the tray 9 is fixed with a transmission shaft 39 coaxial with its virtual rotation axis. The tray 9 is rotatably connected to the support roller 6 by means of the transmission shaft 39. Horizontally, a support shaft 431 is rotatably connected to the upper right and lower right parts of the support roller 6. The two support shafts 431 are coaxially fixed with fifth gears 43 respectively. The right parts of the two transmission shafts 39 are coaxially fixed with fourth gears 45 respectively. The support cylinder 38 on the right part of the box body 1 is coaxially fixed with a sixth gear 44. The two transmission shafts 39 are in transmission connection with the support cylinder 38 with a transmission ratio of 1:1 through the meshing of the fourth gear 45, the fifth gear 43, and the sixth gear 44. An enclosed cavity is formed between the left and right parts of the support roller 6 and the left and right parts of the box body 1. The support cylinder 38, the fifth gear 43, the sixth gear 44, and the fourth gear 45 are all located in the cavity.

[0042] Further, as a component of the second horizontal maintenance mechanism, when the support roller 6 rotates, the transmission shaft 39 follows the support roller 6 to perform a circular motion. At the same time, under the transmission with a transmission ratio of 1:1 of the fifth gear 43, the sixth gear 44, and the fourth gear 45, the transmission shaft 39 can be rotated. For example, when the support roller 6 rotates clockwise for half a turn (observed from the right view angle), the transmission shaft 39 rotates counterclockwise for half a turn (observed from the right view angle), so that the tray 9 always maintains horizontal to stably hold the object on it, and then ensure the stability of the object during temperature testing.

[0043] The control method of a high and low temperature performance test chamber based on a mixed refrigerant includes the following steps: Step 101: Before use, control the lifting mechanism and the electric control stop valve 15 to act, so that the height of the heat preservation tank 14 drops below the heat dissipation pipe. At this time, the heat conducting oil flows back into the heat preservation tank 14 through the electric control stop valve 15. Then, close the electric control stop valve 15 and energize the electric heater 16 to heat the heat conducting oil.

[0044] Step 102: Open the box door 13. By controlling the reduction motor 7 to rotate, the two accommodating grooves 8 are respectively communicated with the heating chamber 3 and the refrigerating chamber 2. Then, place the object to be tested in the upper tray 9. Then, control the support roller 6 to rotate for half a turn, so as to place the second object to be tested in another tray 9.

[0045] Step 103: Close the box door 13, and then control the lifting mechanism and the electric control stop valve 15 to act, so that the height of the heat preservation tank 14 rises above the heat dissipation pipe. At this time, the heat-conducting oil flows back into the heat dissipation pipe through the electric control stop valve 15. Then, close the electric control stop valve 15 and the electric heater 16, and turn on the electric refrigeration device 4 and the electric heating device to heat and cool the refrigeration chamber 2 and the heating chamber 3. Then, control the reduction motor 7 to rotate so that the two receiving grooves 8 are connected to the heating chamber 3 or the refrigeration chamber 2, so as to be able to perform high-temperature and low-temperature tests on the object to be tested on the tray 9.

[0046] Step 104: After the test is completed, control the electric refrigeration device 4 and the electric heating device to stop working. Then, control the lifting mechanism and the electric control stop valve 15 to act again, so that the height of the heat preservation tank 14 drops below the heat dissipation pipe. At this time, the heat-conducting oil flows back into the heat preservation tank 14 through the electric control stop valve 15. Then, close the electric control stop valve 15, so that the heat-conducting oil with remaining temperature can be stored in the heat preservation tank 14 for heat preservation, thereby achieving the heat preservation effect and facilitating the rapid heating of the heating chamber 3 during the next test.

[0047] Step 105: Open the box door 13. When the temperatures of the refrigeration chamber 2 and the heating chamber 3 return to near the ambient temperature, control the reduction motor 7 to rotate so that the two receiving grooves 8 are respectively connected to the heating chamber 3 and the refrigeration chamber 2. Then, take out the object to be tested from the tray 9. Then, control the support roller 6 to rotate half a circle, so as to take out the second object to be tested from another tray 9.

[0048] The above is a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, the changes, modifications, substitutions, and variations made to the embodiments still fall within the protection scope of the present invention.

Claims

1. A high and low temperature performance test chamber based on a mixed refrigerant, comprising a chamber (1), a refrigeration chamber (2), a heating chamber (3), an electric refrigeration device (4), an electric heating device, and a support roller (6), characterized in that: The upper part of the box body (1) is provided with a refrigeration chamber (2) extending forward, and the bottom part is provided with a heating chamber (3) extending forward. An electric refrigeration device (4) is installed in the refrigeration chamber (2). The electric refrigeration device (4) uses a mixed refrigerant for refrigeration. An electric heating device is installed in the heating chamber (3). A support roller (6) is connected to the middle part of the box body (1) in a sealed and rotatable manner along the left and right horizontal directions, and a reduction motor (7) with a braking function is fixed at the left end. The support roller (6) has radial accommodating grooves (8) on the upper and lower parts, and is coaxially fixed with the rotating shaft of the reduction motor (7). When the support roller (6) is rotated to a certain angle, it can The two receiving grooves (8) are respectively connected to the heating chamber (3) and the cooling chamber (2), and the middle part is closed. The two receiving grooves (8) are respectively connected to a horizontal tray (9) that rotates in the left and right directions. The tray (9) is equipped with a horizontal maintenance mechanism. A plurality of heat dissipation pipes are arranged at the bottom of the heating chamber (3). A lifting mechanism is installed at the right part of the box body (1), and a box door (13) that can be sealed and locked is installed at the front part. The lifting mechanism is controlled by a heat preservation tank (14). An electric control stop valve (15) is installed at the lower right part of the box body (1). The left opening of the electric control stop valve (15) is connected to each heat dissipation pipe through a surplus heat-resistant hose. The box (1) is connected to the heat preservation tank (14), and the right opening is connected to the lower part of the heat preservation tank (14) through a surplus hose. The heat preservation tank (14) is equipped with a waterproof electric heater (16) and stores heat transfer oil inside. The heating end of the electric heater (16) is located inside the heat preservation tank (14). The box (1) is fixed with a controller (17). The controller (17), the electric refrigeration device (4), the electric heating device, the reduction motor (7), the electric control stop valve (15), and the electric heater (16) are electrically connected. The lifting mechanism includes an outer support frame (18), a servo motor (19), a lifting frame (20), and a screw rod (21). The right side of the box (1) is connected to the heat preservation tank (14). A vertical outer support frame (18) is fixed at the end, a vertical servo motor (19) is fixed at the top of the outer support frame (18), and a lifting frame (20) is slidably connected up and down, a vertical screw rod (21) is coaxially fixed to the rotating shaft of the servo motor (19), and is electrically connected to the controller (17), the screw rod (21) is rotatably connected to the lifting frame (20), the screw rod (21) is threadedly connected to the lifting frame (20), the heat preservation tank (14) is fixed to the bottom of the lifting frame (20) in the front-to-back direction, and the front lower part of the heat preservation tank (14) is connected to the opening on the right part of the electric control stop valve (15) through a surplus hose;The bottom of the box body (1) is hinged with a swing frame (22), the swing frame (22) can swing left and right, and is located in the heating chamber (3), the rear of the swing frame (22) is fixed with a swing arm (25), the swing arm (25) is radially arranged compared to the virtual axis of the swing frame (22), the top of the swing arm (25) is fixed with a tension spring (26), the rear end of the box body (1) is fixed with a horizontal support arm (27), the bottom end of the support arm (27) is fixed to the top of the tension spring (26), the swing frame (22) has a tendency to tilt to the lower left under the elastic tension of the tension spring (26), and the rear of the lifting frame (20) is fixed with a pressing arm, the pressing arm can press the support arm (27) downward to make the swing frame (22) tilt to the lower right. ; 2. The high and low temperature performance test chamber based on mixed refrigerant according to claim 1, characterized in that: A horizontal inner support frame (28) is fixed in the heating chamber (3), and the inner support frame (28) is rotatably connected to a plurality of horizontal rotating frames (29) in the front-to-back direction. A first gear (30) is fixed to the rear of each rotating frame (29), and the first gear (30) is coaxially arranged with respect to the virtual axis of the rotating frame (29). The electric heating device is an electric heating rod (31), and a ridge-shaped heat reflection plate (32) is fixed to the upper part of the rotating frame (29) in the front-to-back direction, and the reflection surface of the heat reflection plate (32) faces the electric heating rod (31), and the electric heating rod (31) is fixed to the rotating frame (29) in the front-to-back direction. The bottom portion of the heating chamber (3) is slidably connected to a double-sided rack (33) at the rear portion thereof, and the double-sided rack (33) has a tooth structure at both the upper and lower portions. A second gear (34) is fixed to the rear portion of the swing frame (22), and the second gear (34) is coaxially arranged with respect to the virtual axis of the swing frame (22). The first gear (30) is meshed with the bottom portion of the double-sided rack (33), and the upper portion of the double-sided rack (33) is meshed with each second gear (34). When the swing frame (22) swings left and right, each rotating frame (29) can be rotated forward and reversely through the first gear (30), the double-sided rack (33) and the second gear (34).

3. The high and low temperature performance test chamber based on mixed refrigerant according to claim 1, characterized in that: A horizontal sliding frame (35) is slidably connected up and down in the heating chamber (3); the electric heating device is an electric heating rod (31); the electric heating rod (31) is plugged and fixed to the sliding frame (35); a vertical lifting rack (36) is fixed to the front and rear parts of the sliding frame (35); a third gear (37) is fixed to the front and rear parts of the swing frame (22); the two third gears (37) are coaxially arranged with respect to the virtual axis of the swing frame (22). The right parts of the two third gears (37) are respectively meshed with the two lifting racks (36); the heat dissipation pipes include a main heat dissipation pipe (23) and an auxiliary heat dissipation pipe (24); the main heat dissipation pipe (23) is plugged and fixed with the swing frame (22) along the left and right directions; the right parts of the main heat dissipation pipes (23) are fixedly connected through the auxiliary heat dissipation pipes (24); and the front parts of the auxiliary heat dissipation pipes (24) are connected with the opening on the left part of the electric control stop valve (15) through the surplus heat-resistant hose.

4. The high and low temperature performance test chamber based on mixed refrigerant according to any one of claims 1 to 3, characterized in that: The horizontal maintaining mechanism comprises a support cylinder (38), a transmission shaft (39), a first sprocket (40), a second sprocket (41), and a chain (42). The left and right parts of the box body (1) are each fixed with a support cylinder (38) along the left and right horizontal directions. The two support cylinders (38) are respectively connected to the left and right parts of the support roller (6) in rotation on the same axis. A transmission shaft (39) coaxial with its virtual rotation axis is fixed at the bottom of the tray (9). The tray (9) is connected to the support roller (6) in rotation by means of the transmission shaft (39). The right parts of the two transmission shafts (39) are respectively fixed with a first sprocket (40) coaxially. The box body (1 ) The support cylinder (38) on the right side is coaxially fixed with two No. 2 sprockets (41), the two No. 1 sprockets (40) and the two No. 2 sprockets (41) are meshed with two chains (42), the two transmission shafts (39) are connected to the support cylinder (38) on the right side of the casing (1) through the meshing of the No. 1 sprocket (40), the No. 2 sprocket (41) and the chain (42) with a transmission ratio of one to one, the left and right parts of the support roller (6) and the left and right parts of the casing (1) form a closed cavity, and the support cylinder (38), the No. 1 sprocket (40), the No. 2 sprocket (41) and the chain (42) are all located in the cavity.

5. The high and low temperature performance test chamber based on mixed refrigerant according to any one of claims 1 to 3, characterized in that: The horizontal maintaining mechanism comprises a support cylinder (38), a transmission shaft (39), a support shaft, a fifth gear (43), a sixth gear (44), and a fourth gear (45). The left and right parts of the box body (1) are each fixed with a support cylinder (38) in the horizontal direction. The two support cylinders (38) are respectively connected to the left and right parts of the support roller (6) in rotation with the same axis. The bottom of the tray (9) is fixed with a transmission shaft (39) coaxial with its virtual rotation axis. The tray (9) is connected to the support roller (6) in rotation with the transmission shaft (39). The upper right part and the lower right part of the support roller (6) are respectively connected to the horizontal support shaft in rotation with the left and right directions. The two support cylinders (38) are connected to the left and right parts of the support roller (6) in rotation with the same axis. The support shafts are coaxially fixed with a fifth gear (43), the right parts of the two transmission shafts (39) are coaxially fixed with a fourth gear (45), the support cylinder (38) on the right part of the housing (1) is coaxially fixed with a sixth gear (44), the two transmission shafts (39) are connected with the support cylinder (38) at a transmission ratio of one to one through the meshing of the fourth gear (45), the fifth gear (43) and the sixth gear (44), the left and right parts of the support roller (6) and the left and right parts of the housing (1) form a closed cavity, and the support cylinder (38), the fifth gear (43), the sixth gear (44) and the fourth gear (45) are all located in the cavity.

6. The method for controlling a high and low temperature performance test chamber based on a mixed refrigerant according to any one of claims 1 to 3, characterized in that: The control method comprises the following steps: Step 101: Before use, the lifting mechanism and the electric stop valve (15) are controlled to operate so that the height of the heat preservation tank (14) is lowered to be lower than the heat dissipation pipe. At this time, the heat transfer oil flows back into the heat preservation tank (14) through the electric stop valve (15). Then, the electric stop valve (15) is closed and the electric heater (16) is powered on to heat the heat transfer oil. Step 102, opening the box door (13), controlling the reduction motor (7) to rotate so that the two receiving slots (8) are connected to the heating chamber (3) and the cooling chamber (2) respectively, and then placing the object to be tested into the upper tray (9), and then controlling the support roller (6) to rotate half a circle, so that the second object to be tested is placed into the other tray (9); Step 103, close the box door (13), then control the lifting mechanism and the electric control stop valve (15) to operate, so that the height of the heat preservation tank (14) rises to be higher than the heat dissipation pipe, at which time the heat transfer oil flows back into the heat dissipation pipe through the electric control stop valve (15), then close the electric control stop valve (15) and the electric heater (16), and turn on the electric refrigeration device (4) and the electric heating device to heat and cool the refrigeration chamber (2) and the heating chamber (3), and then control the reduction motor (7) to rotate so that the two receiving grooves (8) are connected to the heating chamber (3) or the refrigeration chamber (2), so that the high temperature and low temperature temperature tests can be performed on the test object on the tray (9); Step 104: After the test is completed, the electric refrigeration device (4) and the electric heating device are controlled to stop working, and then the lifting mechanism and the electric control stop valve (15) are controlled to operate again, so that the height of the insulation tank (14) is lowered to be lower than the heat dissipation pipe. At this time, the heat transfer oil flows back into the insulation tank (14) through the electric control stop valve (15), and then the electric control stop valve (15) is closed, so that the heat transfer oil with residual temperature can be stored in the insulation tank (14) for insulation, thereby achieving the insulation effect, which is convenient for quickly heating the heating chamber (3) during the next test; Step 105, open the door (13), wait for the temperature of the refrigeration chamber (2) and the heating chamber (3) to return to a temperature close to the ambient temperature, control the reduction motor (7) to rotate so that the two receiving slots (8) are connected to the heating chamber (3) and the refrigeration chamber (2), respectively, and then take the object to be tested out of the tray (9), and then control the support roller (6) to rotate half a circle, so as to take the second object to be tested out of the other tray (9).

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