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 box based on a mixed refrigerant and a control method, including 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 that penetrates forward, and the bottom is provided with a heating chamber that penetrates forward. The refrigeration chamber is provided with an electric refrigeration device, and the electric refrigeration device uses a mixed refrigerant for refrigeration, and the heating chamber is provided with an electric heating device. During the temperature test of the present invention, the heat transfer oil in the heat preservation 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 object being tested.

Description

Technical Field

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

[0002] Mixed refrigerants are made by mixing multiple single refrigerants in a certain proportion. Compared with a single type of refrigerant, they have better heat exchange and are more environmentally friendly. When conducting temperature tests, existing temperature test devices usually consume electrical energy for heating and cooling. When the test is completed, most of the heat generated by heating is directly discharged and lost, and cannot be used next time. When it is used next time, it needs to be heated again, which results in high energy consumption and insufficient energy saving, highlighting the shortcomings 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 to solve the technical problem that traditional temperature test devices are not energy-efficient enough.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: A high and low temperature performance test box 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 that penetrates forward, and the bottom part is provided with a heating chamber that penetrates forward. The refrigeration chamber is provided with an electric refrigeration device, and the electric refrigeration device adopts a mixed refrigerant for refrigeration. The heating chamber is provided with an electric heating device. The middle part of the box body is sealed and rotatably connected with a support roller along the left and right horizontal directions, and a reduction motor with a braking function is fixed on the left end. The upper and lower parts of the support roller are respectively provided with radial receiving grooves, and are coaxially fixed with the rotating shaft of the reduction motor. When the support roller is rotated to a certain angle, the two receiving grooves can be connected with the heating chamber and the refrigeration chamber respectively, and the middle part is closed. The two receiving grooves are divided into A horizontal tray is connected and rotated along the left and right directions, the tray is equipped with a horizontal maintaining mechanism, a plurality of heat dissipation pipes 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 sealed and locked is installed on the front part, the lifting and lowering control of the lifting mechanism is equipped with a heat preservation tank, an electric control stop valve is installed on the lower right part of the box body, the left opening of the electric control stop valve is connected with each heat dissipation pipe through a surplus heat-resistant hose, and the right opening is connected 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 heat transfer oil is stored inside, the heating end of the electric heater is located in the heat preservation tank, and a controller is fixed to the box body, and the controller, electric refrigeration device, electric heating device, reduction motor, electric control stop valve and electric heater are electrically connected.

[0005] On the basis of the above technical scheme, the lifting mechanism includes an outer support frame, a servo motor, a lifting frame, and a screw rod. A vertical outer support frame is fixed to the right end of the box body, a vertical servo motor is fixed to the top of the outer support frame, and the lifting frame is slidably connected up and down, a vertical screw rod is coaxially fixed to the rotating shaft of the servo motor, and is electrically connected to the controller, the screw rod is rotatably connected to the lifting frame, the screw rod is threadedly connected to the lifting frame, the insulation tank is fixed to the bottom of the lifting frame along the front and rear directions, and the front lower part of the insulation tank is connected to the opening on the right part of the electric control stop valve through a surplus hose.

[0006] On the basis of the above technical scheme, a swing frame is hingedly provided at the bottom of the box body, and the swing frame can swing left and right and is located in the heating chamber. The heat dissipation pipe comprises a main heat dissipation pipe and an auxiliary heat dissipation pipe, and the main heat dissipation pipe is plugged and fixed with the swing frame along the left and right directions. The right parts of the main heat dissipation pipes are fixedly connected through the auxiliary heat dissipation pipes, and the front parts of the auxiliary heat dissipation pipes are connected with the opening on the left part of the electric control stop valve through the surplus heat-resistant hose. A swing arm is fixed to the rear of the swing frame, and the swing arm is radially arranged compared to the virtual axis of the swing frame. A tension spring is fixed to the top of the swing arm, and a horizontal support arm is fixed to the rear end of the box body, and 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 to the lower left under the elastic tension of the tension spring, and a pressing arm is fixed to the rear of the lifting frame, and the pressing arm can press the support arm downward to make the swing frame tilt to the lower right.

[0007] On the basis of the above technical scheme, a horizontal inner support frame is fixed in the heating chamber, and the inner support frame is connected to a plurality of horizontal rotating frames for rotation along the front-rear direction, and a No. 1 gear is fixed to the rear portion of each rotating frame, and the No. 1 gear is coaxially arranged compared with the virtual axis center of the rotating frame. The electric heating device is an electric heating rod, and a ridge-shaped heat reflecting plate is fixed to the upper portion of the rotating frame along the front-rear direction, and the reflecting surface of the heat reflecting plate faces the electric heating rod, and the electric heating rod is fixed to the bottom of the rotating frame along the front-rear direction. A double-sided rack is slidably connected to the rear portion of the heating chamber left and right, and the upper and lower portions of the double-sided rack have tooth structures, and a No. 2 gear is fixed to the rear portion of the swing frame, and the No. 2 gear is coaxially arranged compared with the virtual axis center of the swing frame, the No. 1 gear is meshed with the bottom of the double-sided rack, and the upper portion of the double-sided rack is meshed with each No. 2 gear. When the swing frame swings left and right, each rotating frame can rotate forward and reversely through the No. 1 gear, the double-sided rack and the No. 2 gear.

[0008] On the basis of the above technical scheme, a horizontal sliding frame is connected to the heating chamber for sliding up and down sliding. The electric heating device is an electric heating rod, which is plugged and fixed to the sliding frame. A vertical lifting rack is fixed to the front and rear parts of the sliding frame, and a No. 3 gear is fixed to the front and rear parts of the swing frame. The two No. 3 gears are coaxially arranged compared to the virtual axis of the swing frame, and the right parts of the two No. 3 gears are respectively meshed with the two lifting racks.

[0009] The cam is connected with the transmission gear of the linkage set, and the transmission gear of the linkage set is connected with the transmission gear of the linkage set to the support frame, and the transmission gear of the linkage set is connected with the support gear of the linkage set to the support frame.

[0010] On the basis of the above technical scheme, the horizontal maintaining mechanism includes a support cylinder, a transmission shaft, a support shaft, a fifth gear, a sixth gear, and a fourth gear. The left and right parts of the box body are each fixed with a support cylinder along the left and right horizontal directions. The two support cylinders are respectively rotatably connected with the left and right parts of the support roller on the same axis. A transmission shaft coaxial with its virtual rotation axis is fixed to the bottom of the tray. The tray is rotatably connected with the support roller by the transmission shaft. The upper right and lower right parts of the support roller are respectively rotatably connected with horizontal support shafts along the left and right directions. The two support shafts are respectively coaxially fixed with the fifth gear, and the right parts of the two transmission shafts are respectively coaxially fixed with the fourth gear. The support cylinder on the right part of the box body is coaxially fixed with the sixth gear. The two transmission shafts are meshed with the fourth gear, the fifth gear and the sixth gear to achieve a transmission connection with the support cylinder with a transmission ratio of one to one to one. The left and right parts of the support roller and the left and right parts of the box body form a closed cavity, and the support cylinder, the fifth gear, the sixth gear and the fourth gear are all located in the cavity.

[0011] On the basis of the above technical solution, a control method of a high and low temperature performance test chamber based on a mixed refrigerant is provided, and the control method comprises the following steps: Step 101. Before use, control the lifting mechanism and the electric stop valve to make the height of the insulation tank drop below the heat dissipation pipe. At this time, the heat transfer oil flows back into the insulation tank through the electric stop valve. Then close the electric stop valve and power on the electric heater to heat the heat transfer oil.

[0012] Step 102, open the door, control the reduction motor to rotate so that the two receiving slots are connected to the heating chamber and the cooling chamber respectively, then put the object to be tested into the upper tray, and then control the support roller to rotate half a circle, so as to put the second object to be tested into the other tray.

[0013] Step 103, close the box door, and then control the lifting mechanism and the electric control stop valve to move, so that the height of the insulation tank rises to be higher than the heat dissipation pipe. At this time, the heat transfer oil flows back to the heat dissipation pipe through the electric control stop valve, and 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 cool the refrigeration chamber and the heating chamber, and then control the reduction motor to rotate to connect the two receiving slots with the heating chamber or the refrigeration chamber, so that the high temperature and low temperature temperature tests can be performed on the tested objects on the tray.

[0014] Step 104, after the test is completed, the electric refrigeration device and the electric heating device are controlled to stop working, and then the lifting mechanism and the electric control stop valve are controlled to operate again, so that the height of the insulation tank drops to below the heat dissipation pipe. At this time, the thermal oil flows back to the insulation tank through the electric control stop valve, and then the electric control stop valve is closed, so that the thermal oil with residual temperature can be stored in the insulation tank for insulation, thereby achieving the insulation effect, which is convenient for quickly heating the heating chamber during the next test.

[0015] Step 105, open the door, and when the temperature of the refrigeration chamber and the heating chamber returns to a temperature close to the ambient temperature, control the reduction motor to rotate so that the two receiving slots are connected to the heating chamber and the refrigeration chamber respectively, and then take the tested object out of the tray, and then control the support roller to rotate half a circle to take the second tested object out of the other tray.

[0016] 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

[0017] Figure 1It is a schematic diagram of the axial side structure of the present invention.

[0018] 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.

[0019] Figure 3 This is a schematic diagram of the structure of the first method for improving energy saving effect of the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of the second method for improving energy saving effect of the present invention.

[0021] Figure 5 It is a schematic diagram of the rear structure of the present invention.

[0022] Figure 6 It is a schematic diagram of the composition of the first level maintaining mechanism of the present invention.

[0023] Figure 7 It is a schematic diagram of the composition of the second level maintaining mechanism of the present invention.

[0024] Figure 8 It is a schematic diagram of the axial structure of the box body of the present invention after right section.

[0025] In the figure: 1, box body, 2, refrigeration chamber, 3, heating chamber, 4, electric refrigeration device, 6, support roller, 7, reduction motor, 8, receiving slot, 9, tray, 13, box door, 14, insulation tank, 15, electric control stop valve, 16, electric heater, 17, controller, 18, outer support frame, 19, servo motor, 20, lifting frame, 21, screw rod, 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, gear No. 1, 31, electric heating rod, 32, heat reflection plate, 33, double-sided rack, 34, gear No. 2, 35, sliding frame, 36, lifting rack, 37, gear No. 3, 38, support cylinder, 39, transmission shaft, 40, sprocket No. 1, 41, sprocket No. 2, 42, chain, 431, support shaft, 43, gear No. 5, 44, gear No. 6, 45, gear No. 4. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1-Figure 8As shown, a high and low temperature performance test box 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, and a support roller 6. The upper part of the box body 1 is provided with a refrigeration chamber 2 that penetrates forward, and the bottom is provided with a heating chamber 3 that penetrates forward. The refrigeration chamber 2 is installed with an electric refrigeration device 4, and the electric refrigeration device 4 uses a mixed refrigerant for refrigeration. The heating chamber 3 is installed with an electric heating device. The middle part of the box body 1 is sealed and rotatably connected with a support roller 6 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, the two accommodating grooves 8 can be connected to the heating chamber 3 and the refrigeration chamber 2 respectively, and the middle part is closed. The two accommodating grooves 8 are respectively rotatably connected with horizontal trays 9 in the left and right directions. The disk 9 is equipped with a horizontal maintaining mechanism, and a plurality of heat dissipation pipes are arranged at the bottom of the heating chamber 3. A lifting mechanism 12 is installed on the right part of the box body 1, and a box door 13 that can be sealed and locked is installed on the front part. The lifting mechanism 12 controls the lifting of a heat preservation tank 14. An electric control stop valve 15 is installed on the lower right part of the box body 1. The left opening of the electric control stop valve 15 is connected with each heat dissipation pipe through a surplus heat-resistant hose, and the right opening is connected with 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 heat transfer oil is stored inside. The heating end of the electric heater 16 is located in the heat preservation tank 14. A controller 17 is fixed to the box body 1. The controller 17 is a known prior art, such as a single-chip microcomputer, a PLC or an industrial computer, and 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.

[0028] During the temperature test, the lifting mechanism 12 is controlled to rise so that the heat-conducting oil in the insulation tank 14 flows back into the heat dissipation pipe, and then the electric control stop valve 15 is controlled to be closed, and the electric heating device and the electric refrigeration device 4 are controlled to be energized to work. 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 will be retained in the heating chamber 3 to heat the tested object. When the test is completed, the electric control stop valve 15 is controlled to be turned on and then turned off. During this period, the lifting mechanism 12 is controlled to descend so that the heat-conducting oil in the insulation tank 14 flows back into the insulation tank 14, so that the heat-conducting oil with residual temperature can be kept warm, so that it is convenient for it to flow back to the heat dissipation pipe to heat the heating chamber 3 next time in a short time, and it is also convenient for the heating chamber 3 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.

[0029] The lifting mechanism 12 includes an outer support frame 18, a servo motor 19, a lifting frame 20, and a screw rod 21. A vertical outer support frame 18 is fixed to the right end of the box body 1. A vertical servo motor 19 is fixed to the top of the outer support frame 18, and the lifting frame 20 is slidably connected to the outer support frame 18. 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, and the screw rod 21 is threadedly connected to the lifting frame 20. The insulation tank 14 is fixed to the bottom of the lifting frame 20 along the front and rear directions, and the front lower part of the insulation tank 14 is connected to the opening on the right part of the electric control stop valve 15 through a surplus hose.

[0030] Furthermore, by controlling the servo motor 19 to rotate forward and reverse, the threaded connection between the screw rod 21 and the lifting frame 20 can be utilized to make the lifting frame 20 move up and down along the outer support frame 18, thereby driving the insulation tank 14 to move up and down.

[0031] The bottom of the box body 1 is hinged with a swing frame 22, which 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 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 part of each main heat dissipation pipe 23 is fixedly connected through the auxiliary heat dissipation pipe 24. The front part of the auxiliary heat dissipation pipe 24 is connected with the opening 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 of the swing frame 22. The swing arm 25 is radially arranged compared 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 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. A pressing arm 271 is fixed to the rear of the lifting frame 20. The pressing arm 271 can press the support arm 27 downward to make the swing frame 22 tilt to the lower right.

[0032] Furthermore, when the lifting frame 20 moves downward and the heat preservation tank 14 moves to the bottom of the heat dissipation pipe, the support arm 27 can press down the pressing arm 271, so that the swing frame 22 swings to the lower right and tilts, and then the heat transfer oil in the heat dissipation pipe can flow back to the heat preservation tank 14 faster, while reducing the residue; and when the lifting frame 20 rises and the heat preservation tank 14 moves to the top of the heat dissipation pipe, the support arm 27 is separated from the pressing arm 271, and at this time, under the elastic tension of the tension spring 26, the swing arm 25 and the swing frame 22 rotate and tilt to the lower left, so that the heat transfer oil in the heat preservation tank 14 can flow back to the heat dissipation pipe faster, and it is beneficial to discharge the bubbles in the heat dissipation pipe. The rapid reflux of the heat transfer oil can reduce the loss of heat and improve work efficiency.

[0033] A horizontal inner support frame 28 is fixed in the heating chamber 3, and the inner support frame 28 is connected to a plurality of horizontal rotating frames 29 in a rotatable manner along the front-back direction. A No. 1 gear 30 is fixed to the rear of each rotating frame 29, and the No. 1 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 reflecting plate 32 is fixed to the upper part of the rotating frame 29 along the front-back direction. The reflecting surface of the heat reflecting plate 32 faces the electric heating rod 31, and the electric heating rod 31 is fixed to the rotating frame 2 along the front-back direction. 9 bottom, the rear part of the heating chamber 3 is slidably connected to the left and right with a double-sided rack 33, the upper and lower parts of the double-sided rack 33 have tooth structures, and the rear part of the swing frame 22 is fixed with a No. 2 gear 34, the No. 2 gear 34 is coaxially arranged compared to the virtual axis of the swing frame 22, the No. 1 gear 30 is meshed with the bottom of the double-sided rack 33, and the upper part of the double-sided rack 33 is meshed with each No. 2 gear 34. When the swing frame 22 swings left and right, the No. 1 gear 30, the double-sided rack 33 and the No. 2 gear 34 can make each rotating frame 29 rotate forward and reverse.

[0034] Furthermore, as a first structure for improving the energy-saving effect, when the swing frame 22 swings left and right, each rotating frame 29 can be rotated through the second gear 34, the first gear 30 and the double-sided rack 33. Specifically, when the swing frame 22 tilts to the lower left, due to the rotation of the rotating frame 29, the electric heating rod 31 is on the top and the heat reflecting plate 32 is on the bottom. At this time, if the heat transfer oil is filled in the heat transfer pipe, the heat of the heat transfer oil can be better dissipated upward to heat the heating chamber 3, and the heat generated by the electric heating rod 31 during operation can be better heated by the heat reflecting plate 32. Even if The object to be tested on the tray 9 above is heated, while the downward heat dissipation is relatively reduced, the utilization effect of heat is improved, and more energy is saved; when the test is stopped, that is, when the swing frame 22 tilts to the lower right, because of the rotation of the rotating frame 29, the electric heating rod 31 is at the bottom and the heat reflecting plate 32 is at the top. At this time, the heat of the electric heating rod 31 can be better conducted downward to the heat dissipation pipe to heat the heat transfer oil, that is, the utilization effect of the waste heat of the electric heating rod 31 is improved, more energy is saved, and at the same time, the heat directly conducted to the upper part of the heating chamber 3 (that is, the object to be tested) can be reduced, which is convenient for the object to be tested to cool down quickly.

[0035] A horizontal sliding frame 35 is connected to the heating chamber 3 for sliding up and down connection. The electric heating device is an electric heating rod 31, which 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, and a No. 3 gear 37 is fixed to the front and rear parts of the swing frame 22. The two No. 3 gears 37 are coaxially arranged compared to the virtual axis of the swing frame 22, and the right parts of the two No. 3 gears 37 are respectively meshed with the two lifting racks 36.

[0036] Furthermore, as a second structure for improving energy-saving effects, when the swing frame 22 swings left and right, the sliding frame 35 can move up and down through the No. 3 gear 37 and the lifting rack 36. Specifically, when the swing frame 22 tilts to the lower left, the sliding frame 35 rises and is closer to the receiving slot 8, so that the object under test can be heated more quickly and it is convenient for the object under test to absorb heat; when the swing frame 22 tilts to the lower right, the sliding frame 35 descends and is closer to the heat pipe, so that the heat pipe can be heated more quickly and it is convenient for the heat transfer oil to absorb the waste heat of the electric heating rod 31, thereby improving the utilization efficiency of heat and work efficiency, and saving more energy.

[0037] 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. 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 on the same axis for rotation. A transmission shaft 39 coaxial with its virtual rotation axis is fixed to the bottom of the tray 9. The tray 9 is connected to the support roller 6 by the transmission shaft 39. The right parts of the two transmission shafts 39 are respectively coaxially fixed with a first sprocket 40. The box body The support cylinder 38 on the right side of the box body 1 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, and the two transmission shafts 39 are connected to the support cylinder 38 on the right side of the box body 1 with a transmission ratio of one to one through the meshing of the No. 1 sprocket 40, the No. 2 sprocket 41 and the chain 42. The left and right parts of the support roller 6 and the left and right parts of the box body 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.

[0038] Furthermore, as a component of the first horizontal maintaining 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 No. 1 sprocket 40, the No. 2 sprocket 41 and the chain 42. For example, when the support roller 6 rotates half a circle clockwise (viewed from the right angle), the transmission shaft 39 rotates half a circle counterclockwise (viewed from the right angle), so that the tray 9 always maintains a horizontal state and stably lifts the objects thereon, thereby ensuring the stability of the objects during the temperature test.

[0039] The horizontal maintaining 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. 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 on the same axis for rotation. A transmission shaft 39 coaxial with its virtual rotation axis is fixed to the bottom of the tray 9. The tray 9 is connected to the support roller 6 by 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 431 for rotation along the left and right directions. The support shaft 431 is coaxially fixed with the fifth gear 43, the right parts of the two transmission shafts 39 are coaxially fixed with the fourth gear 45, and the support cylinder 38 on the right part of the box body 1 is coaxially fixed with the sixth gear 44. The two transmission shafts 39 are connected to the support cylinder 38 with a transmission ratio of one to 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 box body 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.

[0040] Furthermore, as a component of the second horizontal maintaining 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 transmission ratio of one to one to one among the fifth gear 43, the sixth gear 44 and the fourth gear 45. For example, when the support roller 6 rotates half a circle clockwise (viewed from the right angle), the transmission shaft 39 rotates half a circle counterclockwise (viewed from the right angle), so that the tray 9 always maintains a horizontal state and stably lifts the objects thereon, thereby ensuring the stability of the objects during the temperature test.

[0041] A control method for a high and low temperature performance test chamber based on a mixed refrigerant, the control method comprising the following steps: Step 101, before use, control the lifting mechanism 12 and the electric control stop valve 15 to operate, so that the height of the insulation tank 14 drops to below 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, and the electric heater 16 is energized to heat the heat transfer oil.

[0042] Step 102, open the door 13, control 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, then put the object to be tested into the upper tray 9, and then control the support roller 6 to rotate half a circle, so as to put the second object to be tested into the other tray 9.

[0043] Step 103, close the box door 13, then control the lifting mechanism 12 and the electric control stop valve 15 to operate, so that the height of the insulation tank 14 rises to be higher than the heat dissipation pipe. At this time, the heat transfer oil flows back to the heat dissipation pipe through the electric control stop valve 15, and 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 tested object on the tray 9 can be tested at high and low temperatures.

[0044] 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 12 and the electric control stop valve 15 are controlled to operate again, so that the height of the insulation tank 14 drops to below the heat dissipation pipe. At this time, the heat transfer oil flows back to 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.

[0045] Step 105, open the door 13, and when the temperatures of the refrigeration chamber 2 and the heating chamber 3 return to 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 tested object out of the tray 9, and then control the support roller 6 to rotate half a circle to take the second tested object out of the other tray 9.

[0046] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection 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. The heating chamber (3) is provided with an electric heating device. The middle part of the box body (1) is connected to a support roller (6) in a sealed and rotatable manner in the horizontal left and right directions, and a reduction motor (7) with a braking function is fixed at the left end. The support roller (6) has radial receiving grooves (8) at 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, the two receiving grooves (8) can be connected to the heating chamber (3) and the refrigeration chamber (2) respectively, and the middle part is closed. The two receiving grooves (8) are connected to horizontal trays (9) in a rotatable manner in the left and right directions. The trays (9) are provided with a horizontal maintenance mechanism. A plurality of heat dissipation pipes are arranged at the bottom of the heating chamber (3); a lifting mechanism (12) 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 (12) 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 opening of the electric control stop valve (15) is connected to each heat dissipation pipe through a surplus heat-resistant hose, 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 installed with a waterproof electric heater (16) and stores heat transfer oil inside; the heating end of the electric heater (16) is located in the heat preservation tank (14); a controller (17) is fixed to the box body (1); 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.

2. The high and low temperature performance test chamber based on mixed refrigerant according to claim 1, characterized in that: The lifting mechanism (12) comprises an outer support frame (18), a servo motor (19), a lifting frame (20), and a screw rod (21). A vertical outer support frame (18) is fixed to the right end of the box body (1). A vertical servo motor (19) is fixed to the top of the outer support frame (18) and is slidably connected to the lifting frame (20) 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. 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.

3. The high and low temperature performance test chamber based on mixed refrigerant according to claim 2, characterized in that: 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 heat dissipation pipe comprises 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 part of each main heat dissipation pipe (23) is fixedly connected through the auxiliary heat dissipation pipe (24), the front part of the auxiliary heat dissipation pipe (24) is connected with the opening on the left part of the electric control stop valve (15) through the surplus heat-resistant hose, and the rear part of the swing frame (22) is fixed with a swing arm (2 5), the swing arm (25) is radially arranged relative 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 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 a pressing arm is fixed to the rear of the lifting frame (20), the pressing arm can press the support arm (27) downward to make the swing frame (22) tilt to the lower right.

4. The high and low temperature performance test chamber based on mixed refrigerant according to claim 3, 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). 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, the double-sided rack (33) having a tooth structure at both the upper and lower portions thereof, a second gear (34) being fixed to the rear portion of the swing frame (22), the second gear (34) being coaxially arranged with respect to the virtual axis of the swing frame (22), the first gear (30) being meshed with the bottom portion of the double-sided rack (33), the upper portion of the double-sided rack (33) being meshed with each of the second gears (34), and when the swing frame (22) swings left and right, each of the rotating frames (29) can be rotated forward and reversely through the first gear (30), the double-sided rack (33) and the second gear (34).

5. The high and low temperature performance test chamber based on mixed refrigerant according to claim 3, 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 No. 3 gear (37) is fixed to the front and rear parts of the swing frame (22); the two No. 3 gears (37) are coaxially arranged with respect to the virtual axis of the swing frame (22); and the right parts of the two No. 3 gears (37) are respectively meshed with the two lifting racks (36).

6. The high and low temperature performance test chamber based on mixed refrigerant according to any one of claims 1 to 5, 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) for rotation on the same axis. A transmission shaft (39) coaxial with its virtual rotation axis is fixed to the bottom of the tray (9). The tray (9) is connected to the support roller (6) for 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 ) is coaxially fixed with two No. 2 sprockets (41) on the right side of the supporting cylinder (38), 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 supporting cylinder (38) on the right side of the housing (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 supporting roller (6) and the left and right parts of the housing (1) form a closed cavity, and the supporting cylinder (38), the No. 1 sprocket (40), the No. 2 sprocket (41) and the chain (42) are all located in the cavity.

7. The high and low temperature performance test chamber based on mixed refrigerant according to any one of claims 1 to 5, 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) 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 with the same axis; a transmission shaft (39) coaxial with its virtual rotation axis is fixed to the bottom of the tray (9); 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 along the left and right directions; 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 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), and 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 to the support cylinder (38) with a transmission ratio of one to one to one through 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.

8. 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 5, characterized in that: The control method comprises the following steps: Step 101: Before use, the lifting mechanism (12) and the electric control 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 control stop valve (15). Then, the electric control 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, closing the box door (13), then controlling the lifting mechanism (12) and the electric control stop valve (15) to operate, so that the height of the heat preservation tank (14) rises to a level 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 closing the electric control stop valve (15) and the electric heater (16), and turning 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 controlling 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 object to be tested on the tray (9) can be tested at high and low temperatures; 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 (12) 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 is stored in the insulation tank (14) for insulation, thereby achieving an 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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