High-temperature test box

Abstract

The high-temperature test box comprises a box body, a working chamber, a temperature adjusting chamber and a high-temperature chamber are arranged in the box body, a heating device is installed in the high-temperature chamber, a hot air outlet and a hot air backflow opening are formed in the two ends of the high-temperature chamber, a cold source system is arranged in the temperature adjusting chamber, and a low-temperature outlet and a low-temperature backflow opening are formed in the two ends of the temperature adjusting chamber; the working chamber is provided with an air inlet channel and an air return channel which are communicated with the working chamber, the air inlet channel is communicated with the hot air outlet and the low-temperature outlet, and the low-temperature outlet is rotationally provided with an air outlet door and a first driving mechanism for controlling the air outlet door to rotate; the air return channel communicates with the hot air backflow opening and the low-temperature backflow opening, and an air return door and a second driving mechanism controlling the air return door to rotate are rotationally arranged at the position of the low-temperature backflow opening. The utility model has the beneficial effects that the linear reduction of the temperature in the working chamber can be realized by opening the two air doors step by step, so that the integrity of the product is ensured, and the overall cooling rate can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental test chambers, in particular to a high-temperature test chamber. Background Art

[0002] Environmental test chambers are test equipment capable of simulating various environments, such as temperature, humidity, and air pressure. They are primarily used to verify the environmental adaptability of electronic and electrical products to ensure they comply with national and industry standards. High-temperature test chambers, in particular, provide a high-temperature air environment for testing product operation in extreme high-temperature environments.

[0003] In the prior art, a high-temperature test chamber includes a workroom and a temperature-controlled chamber. The workroom is used to place the product to be tested. A heating device is provided in the temperature-controlled chamber. When the heating device is started, heat energy circulates between the temperature-controlled chamber and the workroom under the action of a circulating fan, thereby performing a high-temperature test on the product in the workroom. After the product is tested, the door of the test chamber is usually opened first, and room-temperature air is introduced into the test chamber to dilute the high temperature inside. After the product returns to room temperature, the product is taken out of the workroom. However, for ultra-high temperature tests, such an operation will have the following effects on the product: 1. If room-temperature air is directly introduced into the product under extreme high-temperature test conditions such as 450°C, it will cause oxidation of the product; 2. When room-temperature air is introduced, the temperature inside the chamber drops sharply, and the product may be deformed due to the sudden drop in temperature; 3. If the product in the test chamber is allowed to cool naturally before the door is opened to take it out, it will affect the testing progress of other products to be tested, and the test efficiency of the test chamber is low. Utility Model Content

[0004] In view of this, the utility model provides a high-temperature test chamber, which can achieve a linear decrease in temperature in the test chamber under high-temperature test conditions, thereby preventing oxidation and deformation of products.

[0005] To achieve the above purpose, the technical solution of this utility model is as follows:

[0006] A high-temperature test chamber, comprising a chamber, wherein the chamber comprises a working chamber, a conditioning chamber, and a high-temperature chamber, wherein a heating device is installed in the high-temperature chamber, hot air outlets and hot air return ports are provided at both ends of the high-temperature chamber, a cold source system is provided in the conditioning chamber, and low-temperature outlets and low-temperature return ports are provided at both ends of the conditioning chamber;

[0007] The working chamber is provided with an air inlet channel and an air return channel both connected thereto, the air inlet channel is connected to the hot air outlet and the low-temperature outlet, the low-temperature outlet is rotatably provided with an air outlet damper and a first drive mechanism for controlling the rotation of the air outlet damper; under the control of the first drive mechanism, the air outlet damper can switch between closing the low-temperature outlet and opening the hot air outlet;

[0008] The return air channels are both connected to the hot air return port and the low-temperature return port. The low-temperature return port is rotatably provided with a return air damper and a second drive mechanism for controlling the rotation of the return air damper. Under the control of the second drive mechanism, the return air damper can switch between closing the hot air return port and the low-temperature return port.

[0009] With this structure, by opening the dampers at the low-temperature outlet and return ports, the cooling energy generated by the cooling system can be mixed with the heat generated by the heating device. The mixed low-temperature gas circulates within the working chamber and the temperature-regulating chamber, achieving the goal of slowly cooling the working chamber. Simultaneously, by gradually opening the two dampers until the low-temperature circulation channel is fully open and the high-temperature circulation channel is fully closed, the working chamber temperature can be linearly reduced, effectively preventing product deformation caused by sudden temperature drops or oxidation caused by exposure to room temperature, thereby ensuring product integrity.

[0010] Preferably, the temperature-controlled room, high-temperature room, and working room are arranged sequentially from top to bottom within the housing. The air inlet duct has a mixing chamber at the location corresponding to the hot air outlet. This mixing chamber is a rectangular structure, with the low-temperature outlet located at the top and the hot air outlet located at the side of the mixing chamber. The return air duct is a rectangular chamber, with the low-temperature return port located at the top and the hot air return port located at the side of the return air duct. With this structure, the air outlet damper rotates to switch between closing the low-temperature outlet and the hot air outlet, and the return air damper rotates to switch between closing the hot air return port and the low-temperature return port.

[0011] Preferably, a fan is installed in the air inlet channel or the air return channel.

[0012] Preferably, the studio includes a left baffle arranged on one side and an upper baffle arranged on the upper side, the air inlet channel is located on the outside of the left baffle, the return air channel is located on the upper side of the upper baffle, an air inlet is provided on the left baffle, and an air outlet is provided on the upper baffle corresponding to the return air channel.

[0013] Preferably, two groups of the temperature-regulating chambers and high-temperature chambers are provided, and the two groups of high-temperature chambers are symmetrically distributed along the length of the working room, and the two groups of temperature-regulating chambers correspond to the two groups of high-temperature chambers one-to-one. The above structure improves the heating and cooling efficiency of the working room.

[0014] Preferably, the cold source system is an evaporator.

[0015] Preferably, the air outlet door is rotatably mounted on the housing via a support shaft. The first drive mechanism includes an electric cylinder, the cylinder of which is rotatably mounted on the housing via a mounting bracket. The telescopic rod of the electric cylinder is rotatably connected to a force rod, the other end of which is fixedly connected to the support shaft. The use of the electric cylinder enables precise control of the opening and closing speed of the air outlet door, further facilitating linear cooling of the working room temperature.

[0016] As a preferred embodiment, the air outlet door and the air return door are both provided with sealing strips. The above structure improves the sealing effect of the door.

[0017] Preferably, a temperature detector is provided on the box body for testing the temperature in the working chamber.

[0018] Preferably, an explosion-proof box is provided on the box body, and a control unit is provided in the explosion-proof box.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] When using the high-temperature test chamber provided by the present invention, after the product test is completed, the dampers of the low-temperature outlet and the low-temperature return port are opened, and the cold energy generated by the cold source system can be mixed with the heat energy generated by the heating device. The mixed low-temperature gas circulates in the working room and the temperature-controlled room, which can achieve the purpose of slowly cooling the working room. At the same time, the two dampers are opened step by step until the low-temperature circulation channel is fully opened and the high-temperature circulation channel is fully closed. In this process, the temperature in the working room can be linearly reduced, effectively avoiding deformation of the product due to a sudden drop in temperature, or oxidation due to the introduction of room temperature, thereby ensuring the integrity of the product. At the same time, through linear cooling, the overall cooling rate can also be guaranteed, without affecting the test progress of other products to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the structural diagram of the high temperature test chamber;

[0022] Figure 2 This is another structural diagram of the high temperature test chamber (to show the back structure);

[0023] Figure 3 It is a cross-sectional view of the high temperature test chamber;

[0024] Figure 4 A three-dimensional cross-sectional view showing the internal structure of the high-temperature test chamber;

[0025] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0026] Figure 6 It is a partial schematic diagram showing the connection relationship between the first driving mechanism 8 and the air outlet door 3. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0028] like Figure 1 and 4 As shown, a high-temperature test chamber includes a box body A, in which a working room 1, a temperature-controlled room 4 and a high-temperature room 2 are arranged. A heating device 2a is installed in the high-temperature room 2, and hot air outlets 2b and hot air return ports 2c are provided at both ends of the high-temperature room 2. The temperature-controlled room 4 is equipped with a cold source system 4a. In this embodiment, the cold source system 4a is an evaporator. A low-temperature outlet 4b and a low-temperature return port 4c are provided at both ends of the temperature-controlled room 4. The working room 1 is provided with an air inlet channel 1a and a return air channel 1b both connected thereto. The air inlet channel 1a is connected to the hot air outlet 2b and the low-temperature outlet 4b, and the return air channel 1b is connected to the hot air return port 2c and the low-temperature return port 4c. A fan 6 is installed in the air inlet channel 1a or the return air channel 1b. In this embodiment, the fan 6 is arranged in the air inlet channel 1a. Combined Figure 6 As shown, the low-temperature outlet 4b is rotatably provided with an outlet damper 3 and a first drive mechanism 8 for controlling the rotation of the outlet damper 3. Under the control of the first drive mechanism 8, the outlet damper 3 can switch between closing the low-temperature outlet 4b and opening the hot air outlet 2b. The low-temperature return outlet 4c is rotatably provided with a return air damper 5 and a second drive mechanism for controlling the rotation of the return air damper 5. Under the control of the second drive mechanism, the return air damper 5 can switch between closing the hot air return outlet 2c and opening the low-temperature return outlet 4c.

[0029] Based on the above structural design, the high-temperature test chamber operates as follows: During product testing, the outlet damper 3 closes the low-temperature outlet 4b, the return air damper 5 closes the low-temperature return port 4c, and the heating device 2a is turned on. Driven by the fan 6, the heat generated by the heating device 2a circulates along the direction of the high-temperature chamber 2 → the hot air outlet 2b → the air inlet duct 1a → the working chamber 1 → the return air duct 1b → the hot air return port 2c → the high-temperature chamber 2, thereby raising the temperature of the working chamber 1 and meeting the high-temperature testing requirements of the product. After the product test is completed, the first drive mechanism 8 controls the outlet damper 3 to gradually close the hot air outlet 2b, and the second drive mechanism controls the return air damper 5 to gradually close the hot air return port 2c. During this process, the working chamber 1 has two air circulation channels: the high-temperature circulation channel described above and the low-temperature circulation channel that runs along the direction of the conditioning chamber 4 → the low-temperature outlet 4b → the air inlet duct 1a → the working chamber 1 → the return air duct 1b → the low-temperature return port 4c → the conditioning chamber 4. By properly controlling the closing speed of these two dampers, the desired linear temperature reduction can be achieved. After the temperature is linearly lowered to a certain level, the outlet damper 3 closes the hot air outlet 2b, and the return air damper 5 closes the hot air return port 2c. At this time, the interior of the studio 1 is a low-temperature circulation channel, that is, the cooling energy generated by the evaporator circulates along the direction of the temperature-controlled chamber 4 → low-temperature outlet 4b → air inlet channel 1a → studio 1 → return air channel 1b → low-temperature return port 4c → temperature-controlled chamber 4, thereby achieving the purpose of quickly restoring the high temperature at the end to normal temperature and improving the cooling efficiency. This structural design avoids deformation of the product due to a sudden drop in temperature under ultra-high temperature conditions, thereby ensuring the integrity of the product. At the same time, through linear cooling, the overall cooling rate of the studio 1 can also be guaranteed, thereby improving the testing efficiency of the product.

[0030] For example Figure 4 As shown, the conditioning chamber 4, high-temperature chamber 2, and working chamber 1 are arranged sequentially from top to bottom within the housing. The air inlet duct 1a has a mixing chamber 2d at the position corresponding to the hot air outlet 2b. The mixing chamber 2d is a rectangular structure, with the low-temperature outlet 4b located at the top and the hot air outlet 2b located at the side of the mixing chamber 2d. Therefore, turning the air outlet damper 3 upward can close the low-temperature outlet 4b, and turning the air outlet damper 3 downward can close the hot air outlet 2b. The return air duct 1b is a rectangular chamber, with the low-temperature return port 4c located at the top and the hot air return port 2c located at the side of the return air duct 1b. Turning the return air damper 5 upward can close the low-temperature return port 4c, and turning the return air damper 5 downward can close the hot air return port 2c. When the studio 1 is cooled, the cold energy generated by the cold source system 4a enters the mixing chamber 2d through the low-temperature outlet 4b and is mixed with the heat energy generated by the heating device 2a. The mixed low-temperature gas circulates in the studio 1 and the temperature-control room 4, thereby achieving the purpose of slowly cooling the studio 1 and avoiding deformation of the product due to a sudden drop in the temperature of the studio 1.

[0031] Please refer to Figure 4 The studio 1 includes a left baffle 1c arranged on the left side and an upper baffle 1d arranged on the upper side. The air inlet channel 1a is located on the outside of the left baffle 1c, the return air channel 1b is located on the upper side of the upper baffle 1d, and the fan 6 is arranged at the top of the air inlet channel 1a. In this embodiment, the fan 6, the mixing chamber 2d, the high-temperature chamber 2 and the return air channel 1b are located on the same horizontal plane and are distributed in sequence along the length direction of the studio 1. Such a layout has the advantages of compact and reasonable structure. Furthermore, an air inlet a is provided on the left baffle 1c, and the air inlet a is located at the lower part of the left baffle 1c. The upper baffle 1d is provided with an air outlet b at a position corresponding to the return air channel 1b. The airflow of the air inlet channel 1a can enter the studio 1 through the air inlet a, and then flow into the return air channel 1b through the air outlet b.

[0032] Please refer to Figure 3 and 4 The high-temperature test chamber provided in this embodiment is a rectangular structure with a long length, which can be used to test products with a relatively long structure and a low height. In order to ensure the heating and cooling efficiency of the test chamber, two groups of temperature-controlled chambers 4 and high-temperature chambers 2 are provided. The two groups of high-temperature chambers 2 are symmetrically distributed along the length direction of the studio 1, and the two groups of temperature-controlled chambers 4 correspond one to one to the two groups of high-temperature chambers 2. The fans 6, mixing chambers 2d, and return air channels 1b corresponding to each group of high-temperature chambers 2 are symmetrically distributed, and the two return air channels 1b are connected. Similarly, the two groups of temperature-controlled chambers 4 on the upper side are also symmetrically distributed, and the two groups of low-temperature return ports 4c are connected. Correspondingly, the studio 1 also includes a right baffle 1e on the right side, and the outside of the right baffle 1e also has an air inlet channel 1a. The structure on the right side of the studio 1 is the same as that on the left side, and will not be repeated here.

[0033] Re-attend Figure 5 and 6 , the air outlet damper 3 is rotatably assembled on the box body A through the support shaft 3a, and the first driving mechanism 8 includes an electric cylinder 8a, and the cylinder body of the electric cylinder 8a is rotatably assembled on the box body A through the mounting base 8b. In this embodiment, the electric cylinder 8a is installed on the rear side of the box body A. The outer end of the telescopic rod of the electric cylinder 8a is rotatably connected to the force rod 8c, and the force rod 8c is fixedly connected to the support shaft 3a at one end away from the electric cylinder 8a. When the telescopic rod performs telescopic movement, it can drive the force rod 8c to rotate, and the rotation of the force rod 8c drives the support shaft 3a to rotate, thereby driving the air outlet damper 3 to open and close. The use of the electric cylinder 8a can accurately control the opening and closing speed of the air outlet damper 3, which is more conducive to achieving linear cooling of the temperature in the studio 1. Since the structure and driving mechanism of each damper are the same, they will not be repeated here. Combined Figure 2 It can be seen that a cover 10 is provided on the rear side of the box body A at the position of the electric cylinder 8 a, which is used to cover and protect the electric cylinder 8 a.

[0034] In order to ensure the sealing effect of the air door, each air outlet air door 3 and return air door 5 is provided with a sealing strip.

[0035] like Figure 3 and 4 As shown, a temperature detector 7 is provided on the box A, and the temperature detector 7 is used to test the temperature in the studio 1. In this embodiment, the temperature detector 7 is a thermal resistor, and there are two of them, which are located at the left and right ends of the lower part of the box A respectively.

[0036] For example Figure 2 As shown, an explosion-proof box 9 is further provided on one side of the box body A. A control unit is provided inside the explosion-proof box 9, and the control unit can adjust the internal temperature of the box body A.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention. Such changes fall within the scope of protection of the present invention.

Claims

1. A high temperature test chamber, comprising a chamber (A), characterized in that: The box (A) is provided with a working room (1), a temperature-controlled room (4) and a high-temperature room (2); a heating device (2a) is installed in the high-temperature room (2); hot air outlets (2b) and hot air return ports (2c) are provided at both ends of the high-temperature room (2); a cold source system (4a) is provided in the temperature-controlled room (4); and low-temperature outlets (4b) and low-temperature return ports (4c) are provided at both ends of the temperature-controlled room (4); The working room (1) is provided with an air inlet channel (1a) and an air return channel (1b) both of which are in communication therewith; the air inlet channel (1a) is in communication with the hot air outlet (2b) and the low-temperature outlet (4b); the low-temperature outlet (4b) is rotatably provided with an air outlet damper (3) and a first driving mechanism (8) for controlling the rotation of the air outlet damper (3); under the control of the first driving mechanism (8), the air outlet damper (3) can switch between closing the low-temperature outlet (4b) and the hot air outlet (2b); The return air channel (1b) is connected to the hot air return port (2c) and the low-temperature return port (4c), and the low-temperature return port (4c) is rotatably provided with a return air damper (5) and a second drive mechanism for controlling the rotation of the return air damper (5); Under the control of the second driving mechanism, the return air damper (5) can switch between closing the hot air return port (2c) and the low-temperature return port (4c).

2. The high temperature test chamber according to claim 1, characterized in that: The temperature-controlled chamber (4), the high-temperature chamber (2) and the working chamber (1) are arranged in sequence from top to bottom in the box; the air inlet channel (1a) has a mixing chamber (2d) at a position corresponding to the hot air outlet (2b); the mixing chamber (2d) is a rectangular structure; the low-temperature outlet (4b) is located at the top of the mixing chamber (2d); and the hot air outlet (2b) is located at the side of the mixing chamber (2d); the return air channel (1b) is a rectangular chamber; the low-temperature return port (4c) is located at the top of the return air channel (1b); and the hot air return port (2c) is located at the side of the return air channel (1b).

3. The high temperature test chamber according to claim 1, characterized in that: A fan (6) is installed in the air inlet channel (1a) or the air return channel (1b).

4. The high temperature test chamber according to claim 1, characterized in that: The studio (1) comprises a left baffle (1c) arranged on one side and an upper baffle (1d) arranged on the upper side, the air inlet channel (1a) is located outside the left baffle (1c), the return air channel (1b) is located on the upper side of the upper baffle (1d), an air inlet (a) is provided on the left baffle (1c), and an air outlet (b) is provided on the upper baffle (1d) at a position corresponding to the return air channel (1b).

5. The high temperature test chamber according to claim 1, characterized in that: The two groups of the temperature-regulating chambers (4) and the high-temperature chambers (2) are each provided. The two groups of the high-temperature chambers (2) are symmetrically distributed along the length direction of the studio (1). The two groups of the temperature-regulating chambers (4) correspond one to one to the two groups of the high-temperature chambers (2).

6. The high temperature test chamber according to claim 1, characterized in that: The cold source system (4a) is an evaporator.

7. The high temperature test chamber according to claim 1, characterized in that: The air outlet damper (3) is rotatably mounted on the box body (A) via a support shaft (3a); the first driving mechanism (8) comprises an electric cylinder (8a); the cylinder body of the electric cylinder (8a) is rotatably mounted on the box body (A) via a mounting base (8b); the telescopic rod of the electric cylinder (8a) is rotatably connected to a force rod (8c); the other end of the force rod (8c) is fixedly connected to the support shaft (3a).

8. The high temperature test chamber according to claim 1, characterized in that: The air outlet damper (3) and the air return damper (5) are both provided with sealing strips.

9. The high temperature test chamber according to claim 1, characterized in that: The box (A) is provided with a temperature detector (7) for testing the temperature in the working room (1).

10. The high temperature test chamber according to claim 1, characterized in that: An explosion-proof box (9) is also provided on the box body (A), and a control unit is provided in the explosion-proof box (9).

Images