Rapid cooling type high-temperature aging anaerobic test box

Abstract

The utility model relates to the technical field of test boxes, in particular to a rapid cooling type high-temperature aging anaerobic test box, which comprises an inner box body, an outer box body, a channel, an impeller and a cooling device, and is characterized in that a gap is reserved between the inner box body and the outer box body to form the channel, the inner box body is provided with at least one air port communicated with the channel, and the air port is communicated with the impeller. The channel and the inner box body jointly form an airtight cavity through the air opening. The impeller is arranged on one side of the inner box body and located between the inner box body and the channel, and the impeller rotates to enable the inner box body and the channel to generate air pressure difference so as to drive air to circularly flow between the inner box body and the channel. The diameter of the impeller is larger than 1 / 2 of the width of the side face of the inner box body. The cooling device is arranged at the bottom of the outer box body and located in the channel so as to cool air passing through the air channel. The device is simple in structure, and the temperature in the box can be quickly and uniformly reduced under the condition that the concentration of nitrogen in the box is constant.

Description

Technical Field

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

[0002] At present, high-temperature aging processes are widely used at home and abroad to improve the reliability and stability of electronic components. However, during the high-temperature aging test, electronic components are very easy to be oxidized. Currently, filling with stable nitrogen during the test is a feasible solution to the oxidation of test samples. However, the cooling of the test equipment after the test is completed is always a difficult problem. If the cooling can be achieved quickly, it will greatly shorten the time of the entire test process and improve the test efficiency.

[0003] Conventional high temperature aging test chambers use a blower or centrifugal fan to extract heat from the chamber for cooling. For example, Chinese patent publication number CN214427473U discloses a nitrogen high temperature test chamber with door opening protection function. However, this technical solution has the problem that during the cooling process, the oxygen concentration in the test chamber cannot be guaranteed to remain unchanged compared to before the cooling, which affects the accuracy of the test.

[0004] The Chinese patent with announcement number CN201724948U discloses a nitrogen high-temperature test chamber that can quickly cool down. By setting an independent cooling air duct on the outer wall of the inner box, the heat in the box is taken away by heat conduction between the cooling channel and the inner box during cooling, so as to solve the technical problem of the change of oxygen concentration in the inner box during the cooling process in the above technical solution. However, this technical solution has the problem of difficulty in quickly and evenly reducing the temperature of the entire inner box. The inner box cannot be cooled quickly, and the waiting time for opening the box is long, which reduces the test efficiency; and once a temperature gradient appears in the inner box, it will affect the accuracy of the test results. Utility Model Content

[0005] The utility model provides a high-temperature aging anaerobic test box capable of rapid temperature reduction, so as to solve the technical problem that it is difficult to rapidly and evenly reduce the temperature inside the entire box in the prior art.

[0006] In order to solve the above problems, the utility model provides a high-temperature aging anaerobic test box with rapid cooling, which adopts the following technical solutions:

[0007] A high-temperature aging anaerobic test box capable of rapid cooling, comprising an inner box body, an outer box body, a channel, an impeller, and a cooling device.

[0008] A gap is left between the inner box and the outer box to form a channel, the inner box is provided with at least one air vent connected to the channel, and the channel and the inner box together form an airtight cavity through the air vent;

[0009] The impeller is arranged on one side of the inner box and is located between the inner box and the channel. The rotation of the impeller generates a wind pressure difference between the inner box and the channel, so as to drive the gas to circulate between the inner box and the channel. The diameter of the impeller is greater than 1 / 2 of the width of the side of the inner box.

[0010] The cooling device is arranged at the bottom of the outer box body and is located in the channel to cool the gas passing through the air duct.

[0011] As a preferred technical solution of the utility model, it also includes a heating device, which is arranged at the bottom of the outer box and located in the channel to heat the gas passing through the air duct.

[0012] As a preferred technical solution of the utility model, it also includes a shell, the outer box is placed in the shell, and an insulation layer is arranged between the inner wall of the shell and the outer wall of the airtight cavity, and the insulation layer and the airtight cavity are isolated from each other.

[0013] Specifically, the thermal insulation layer is filled with thermal insulation material.

[0014] As a preferred technical solution of the utility model, it also includes a fan, which is arranged in the shell, and the rotating shaft of the fan passes through the insulation layer and is connected to the impeller.

[0015] As a preferred technical solution of the utility model, the impeller is an axial flow heat dissipation impeller.

[0016] As a preferred technical solution of the utility model, the outer box body is provided with a gas pressure relief port communicating with the channel.

[0017] The beneficial effects are:

[0018] The utility model has a simple structure and realizes the rapid and uniform reduction of the temperature in the box under the condition of constant nitrogen concentration in the box. The test box forms a channel by leaving a gap between the inner box and the outer box, and the channel and the inner box form an airtight cavity through the air outlet; and a large impeller is arranged between the side of the inner box and the channel and a high-speed fan adapted thereto is configured, so that a large wind pressure difference is generated between the inner box and the channel, forming a circulating wind with a high wind speed, and ensuring the uniformity of the temperature field of the inner box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0020] Figure 1 This is a front view structural schematic diagram of the utility model;

[0021] Figure 2 It is a side view structural schematic diagram of the utility model;

[0022] Figure 3 for Figure 1 Section view along AA direction;

[0023] Figure 4 for Figure 2 Cross-section along direction BB.

[0024] Description of reference numerals:

[0025] 1. Inner box; 2. Outer box; 3. Channel; 4. Impeller; 5. Cooling device; 51. Filter assembly; 52. Ball valve; 53. Pressure relief valve; 54. Check valve; 6. Heating device; 7. Shell; 8. Fan; 9. Gas pressure relief port; 10. Insulation layer. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0027] The utility model sets up a closed circulation system - an airtight cavity, in which cooling liquid is used as a medium, and heat energy is exchanged with the cooling system outside the box through a heat exchanger without directly exchanging with the gas inside the inner box. In this way, the low oxygen environment inside the inner box can be maintained and rapid temperature reduction can be achieved.

[0028] It is very important to ensure that the internal temperature of the box in the test box is uniform. It may be difficult to quickly and evenly reduce the temperature inside the entire inner box by relying solely on heat conduction. Once a temperature gradient occurs, the accuracy of the test results will be affected. The utility model sets a large impeller between the side of the inner box and the channel and configures a high-speed fan adapted thereto, so that a large wind pressure difference is generated between the inner box and the channel, forming a circulating wind with a high wind speed, thereby ensuring the uniformity of the temperature field of the inner box.

[0029] After introducing the basic principle of the utility model, various non-limiting embodiments of the utility model are specifically introduced below. Any number of elements in the drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0030] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0031] See also Figure 1-4 The high-temperature aging anaerobic test box with rapid cooling shown in the figure comprises an inner box body 1, an outer box body 2, a channel 3, an impeller 4, a heating device 6, and a cooling device 5.

[0032] The outer box body 2 is L-shaped, and the inner box body 1 is placed inside the outer box body 2. A gap is left between the inner box body 1 and the outer box body 2 to form a channel 3. The inner box body 1 is provided with at least one air vent connected to the channel 3, one of which is arranged at the bottom of the inner box body 1. The gas in the channel 3 can flow into the inner box body 1 along the air vent; the channel 3 and the inner box body 1 together form an airtight cavity through the air vent.

[0033] See also Figure 3 As shown, the impeller 4 is arranged on the side of the inner box 1 and is located between the inner box 1 and the channel 3. The impeller 4 is connected to the fan 8. The fan 8 is started, driving the impeller 4 to rotate so that the inner box 1 and the channel 3 generate a wind pressure difference, so as to drive the gas to circulate between the inner box 1 and the channel 3 (i.e., in the airtight cavity); the diameter of the impeller 4 is greater than 1 / 2 of the width of the side of the inner box 1 and less than the width of the side of the inner box 1; the speed of the fan 8 is 2600r / min-3600r / min. In this embodiment, the diameter of the impeller 4 is 320mm, and the width of the side of the inner box 1 is 600mm; the speed of the fan 8 is 2800r / min, and the fan 8 drives the impeller 4 to form a high wind speed at a high speed to improve the replacement efficiency of the gas in the airtight cavity and the temperature uniformity in the channel 3, so as to ensure the uniformity of the temperature field in the inner box 1 and accelerate the change of the temperature field in the inner box 1. Of course, in other embodiments, the rotation speed of the fan 8 may also be 3000 r / min, 3400 r / min, etc.

[0034] The cooling device 5 is arranged in the air duct and below the inner box 1 (i.e., the bottom of the outer box 2), and is used to cool the gas flowing through the air duct. The cooling device 5 is a liquid-cooled cooler, which utilizes the high thermal conductivity and heat dissipation effect of the coolant to absorb the heat of the gas flowing through the cooling device 5 through the circulating water flow, thereby achieving the effect of cooling the gas flowing through the air duct, and cooling the gas in the entire airtight cavity through the gas circulation in the airtight cavity. The cooling device 5 is arranged below the bottom of the inner box 1, and can cool the bottom of the inner box 1, reduce the temperature of the bottom wall of the inner box 1, and thereby increase the cooling rate (compared to gas replacement cooling, even if the high-temperature gas in the inner box 1 is replaced, the side wall of the inner box 1 still has heat, and the temperature will rise again immediately). In this embodiment, the cooling device 5 is a water-cooled cooler.

[0035] See also Figure 2 and Figure 4As shown, the liquid-cooled cooler includes a liquid inlet and a liquid outlet. The liquid outlet is provided with a one-way valve 54 and a pressure relief valve 53. The liquid inlet is provided with a filter assembly 51, a ball valve 52 and a one-way valve 54 in sequence. The filter assembly 51 is used to filter impurities in the coolant to prevent particulate matter from entering the cooler, reduce blockage and wear, and extend the service life of the cooler. The ball valve 52 controls the flow of the coolant and can fully open or close the water inlet, which is convenient for maintenance and closure in emergency situations. The one-way valve 54 only allows the coolant to flow in one direction to prevent the coolant from flowing back and protect the system from pressure fluctuations and backflow. The pressure relief valve 53 automatically opens when the system pressure exceeds the safety limit to release excess coolant or gas to prevent the cooler from being damaged by overpressure.

[0036] The heating device 6 is arranged in the air duct, and is used to heat the gas flowing through the air duct to ensure that the gas in the channel 3 is heated and maintained at a preset temperature, thereby indirectly heating the inner box 1. When in use, by heating the temperature of the gas in the channel 3, the high-temperature gas in the channel 3 can preheat the bottom of the inner box 1 during the process of flowing into the inner box 1, and the gas in the channel 3 can indirectly adjust the temperature of the inner box 1 during the process of flowing into the inner box 1, thereby improving the heating efficiency of the inner box 1. The heating device 6 belongs to the prior art and will not be described in detail here.

[0037] Preferably, it further includes a shell 7, the outer box 2 is placed in the shell 7, and an insulation layer 10 is arranged between the inner wall of the shell 7 and the outer wall of the airtight cavity, and the insulation layer 10 and the airtight cavity are isolated from each other. The insulation layer 10 is filled with insulation material. The insulation layer 10 can more effectively control heat loss and shorten the temperature field change time in the inner box 1.

[0038] Preferably, the fan 8 is arranged in the housing 7, and the rotating shaft of the fan 8 passes through the insulation layer 10 and is connected to the impeller 4. The fan 8 will generate heat when working. By arranging the fan 8 in the housing 7 and insulating it through the insulation layer 10, the influence of the heat generated by the fan 8 on the temperature field in the inner box 1 is reduced.

[0039] Preferably, the impeller 4 is an axial flow heat dissipation impeller 4 .

[0040] The outer box 2 is provided with an air inlet connected to the channel 3. Nitrogen flows from the air inlet into the channel 3 and then flows from the channel 3 into the inner box 1. Driven by the impeller 4, the nitrogen flows along the entire airtight cavity (i.e., circulates in the inner box 1 and the channel 3). When the inner box 1 is cooled, a certain flow of nitrogen continuously enters the channel 3 from the air inlet to prevent the inner box 1 and the outer box 2 from being deformed by pressure.

[0041] The outer box body 2 is also provided with a gas pressure relief port 9 connected to the channel 3. In the present embodiment, the gas pressure relief port 9 is arranged at the bottom of the outer box body 2. When the gas expands due to heat, the gas pressure relief port 9 can discharge part of the gas to prevent the inner box body 1 and the outer box body 2 from being compressed and deformed.

[0042] When in use, under the action of the fan 8, the gas in the inner box 1 flows from the upper part into the channel 3, and then flows back to the inner box 1 from the lower part of the channel 3 (the bottom tuyere of the inner box 1). During the gas circulation, the gas flowing through the channel 3 is heated by the heating device 6 to provide a high temperature environment for the inner box 1 of the test box, or the gas flowing through the channel 3 is cooled by the cooling device 5 to provide a low temperature environment for the inner box 1 of the test box, so that the box reaches the required test temperature, and nitrogen is introduced through the air inlet, and the gas pressure relief port 9 outputs the gas until the air pressure inside and outside the inner box 1 is balanced. After the high temperature test is completed, the cooling operation begins, and the ball valve 52 controls the external coolant to pass into the cooler in the box. The high temperature gas of the inner box 1 circulates through the fan 8. When the wind passes through the surface of the cooler, the temperature of the coolant in the cooler rises, taking away the heat of the inner box 1, realizing heat exchange, so that the inner box 1 is quickly cooled and the nitrogen concentration in the inner box 1 can be kept constant, thereby reducing the waiting time for opening the test box.

[0043] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "inside", "outside", "bottom", "length" and other terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings of this specification, which are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0044] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A high-temperature aging anaerobic test box capable of rapid cooling, comprising an inner box body (1), an outer box body (2), a channel (3), an impeller (4), and a cooling device (5), characterized in that: A gap is left between the inner box (1) and the outer box (2) to form a channel (3); the inner box (1) is provided with at least one air outlet connected to the channel (3); the channel (3) and the inner box (1) together form an airtight cavity through the air outlet; The impeller (4) is arranged on one side of the inner box (1) and is located between the inner box (1) and the channel (3); the impeller (4) rotates to generate a wind pressure difference between the inner box (1) and the channel (3), thereby driving the gas to circulate between the inner box (1) and the channel (3); the diameter of the impeller (4) is greater than 1 / 2 of the side width of the inner box (1); The cooling device (5) is arranged at the bottom of the outer box (2) and is located in the channel (3) to cool the gas passing through the air duct.

2. The fast cooling high temperature aging anaerobic test box according to claim 1, characterized in that: It also comprises a heating device (6), which is arranged at the bottom of the outer box (2) and located in the channel (3) to heat the gas passing through the air duct.

3. The fast cooling high temperature aging anaerobic test box according to claim 2, characterized in that: It also comprises a shell (7), the outer box (2) being placed inside the shell (7), and a heat-insulating layer (10) being arranged between the inner wall of the shell (7) and the outer wall of the airtight cavity, the heat-insulating layer (10) and the airtight cavity being isolated from each other.

4. The fast cooling high temperature aging anaerobic test box according to claim 3, characterized in that: It also comprises a fan (8), wherein the fan (8) is arranged in the housing (7), and the rotating shaft of the fan (8) passes through the thermal insulation layer (10) and is connected to the impeller (4).

5. A fast cooling high temperature aging anaerobic test box as claimed in any one of claims 1 to 4, characterized in that: The impeller (4) is an axial flow heat dissipation impeller (4).

6. The fast cooling high temperature aging anaerobic test box according to claim 5, characterized in that: The outer box body (2) is provided with a gas pressure relief port (9) communicating with the channel (3).

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