CN114433256A

CN114433256A - Clean high-temperature box

Info

Publication number: CN114433256A
Application number: CN202210143158.9A
Authority: CN
Inventors: 杨胜坤; 戴树乐; 周莹莹; 王晓丹; 曹峻; 刘斌; 穆雅楠; 王哲; 崔倩倩; 单惠琳; 廖德阳; 邓成臣; 夏可瑜
Original assignee: Dongguan City Simplewell Technology Co ltd; Shandong Institute for Product Quality Inspection
Current assignee: Dongguan City Simplewell Technology Co ltd; Shandong Institute for Product Quality Inspection
Priority date: 2022-02-16
Filing date: 2022-02-16
Publication date: 2022-05-06

Abstract

The invention discloses a clean high-temperature box, which comprises an outer box body, an inner box body and a heating device, wherein the inner box body is arranged in the outer box body, an air jacket is formed between the inner wall of the outer box body and the outer wall of the inner box body, the inner box body is of a hollow structure and forms an accommodating cavity, the inner box body is provided with an air return opening communicated with the air jacket and the accommodating cavity, gas in the air jacket can flow into the accommodating cavity along the air return opening, and the heating device is used for heating the air jacket gas and indirectly adjusting the temperature of the accommodating cavity; the inner box body is provided with at least one air return inlet communicated with the air jacket and the accommodating cavity, during testing, a clean environment is formed in the accommodating cavity under the action of the circulating device, in addition, the inner box body wall can be preheated in the process of the gas of the air jacket flowing into the accommodating cavity, the temperature rising speed of the accommodating cavity is effectively improved, a large amount of nitrogen is injected into a closed cavity formed by the air jacket and the accommodating cavity during temperature reduction, the rapid temperature reduction of the accommodating cavity is ensured, the clean environment is kept, and the cleanliness and the temperature uniformity of environment simulation are improved.

Description

Clean high-temperature box

Technical Field

The invention relates to the technical field of environmental simulation tests, in particular to a clean high-temperature box.

Background

The prior art mainly adopts clean high-temperature cabinet to carry out environmental simulation test, and current clean high-temperature cabinet is generally equipped with the circulated air system at top, bottom or rear side, and the circulated air passes through the filter and gets into the under-deck, sets up air jacket layer on circulating fan installation face and on the filter air-out face, and other several lateral walls of clean high-temperature cabinet except that the door do not have jacket device, can't preheat clean high-temperature cabinet, cause clean high-temperature cabinet in the temperature homogeneity not high.

Disclosure of Invention

The invention aims to provide a clean high-temperature box which can effectively reduce the use cost and improve the cleanliness and temperature uniformity of environmental simulation.

In order to achieve the purpose, the invention discloses a clean high-temperature box which comprises an outer box body, an inner box body and a heating device, wherein the inner box body is arranged in the outer box body, an air jacket is formed between the inner wall of the outer box body and the outer wall of the inner box body, the inner box body is of a hollow structure and forms an accommodating cavity, the inner box body is provided with at least one air return opening communicated with the air jacket and the accommodating cavity, gas in the air jacket can flow into the accommodating cavity along the air return opening, and the heating device is used for heating the gas in the air jacket so as to indirectly adjust the temperature of the accommodating cavity.

Compared with the prior art, the air jacket is formed between the inner wall of the outer box body and the outer wall of the inner box body, the inner box body is of a hollow structure and forms an accommodating cavity, the inner box body is provided with at least one air return opening communicated with the air jacket and the accommodating cavity, air in the air jacket can flow into the accommodating cavity along the air return opening, the air in the air jacket is heated through the heating device, so that the temperature of the accommodating cavity is indirectly increased through the air jacket, and the air flows into the accommodating cavity along the air return opening to preheat the accommodating cavity, so that the accommodating cavity is guaranteed to have better temperature uniformity, and the clean high-temperature box can provide a stable simulation test environment.

Preferably, the outer box body is provided with a first exhaust port communicated with the air jacket, and gas can selectively flow out from the first exhaust port.

Preferably, the clean high-temperature box further comprises a filtering device, and the filtering device is used for filtering impurities of the gas entering the accommodating cavity along the air return opening.

Preferably, the top and the two side walls of the inner box body are respectively provided with the air return openings.

Specifically, the filter device comprises two filters, and the filters are arranged on the air return openings of the corresponding side walls of the inner box body.

Preferably, the clean high-temperature box further comprises a circulating device, the air jacket and the accommodating cavity form an airtight cavity together through the air return opening, and the circulating device is used for driving the gas in the airtight cavity to circularly flow.

Preferably, the outer box body is provided with an air inlet communicated with the air jacket, the inner box body is provided with a second air outlet communicated with the accommodating cavity, and the inert gas selectively flows into the airtight cavity through the air inlet and flows out of the second air outlet.

Preferably, the first exhaust port, the air inlet and the second exhaust port are respectively provided with an independently controlled check valve.

Preferably, the clean high-temperature box further comprises a casing, the outer casing is arranged in the casing, a heat insulation layer is formed between the inner wall of the casing and the outer wall of the outer casing, and the heat insulation layer is isolated from the air jacket.

Specifically, the heat-insulating layer is filled with a heat-insulating material.

Drawings

FIG. 1 is an angled schematic view of a first embodiment of the clean hot box of the present invention;

FIG. 2 is a schematic view of a clean high temperature chamber according to another embodiment of the present invention;

FIG. 3 is an angled schematic view of a second embodiment of the clean hot box of the present invention;

fig. 4 is a schematic view of a second embodiment of the clean hot box of the present invention from a still further perspective.

Detailed Description

In order to explain the technical contents, structural features, objects and effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.

First embodiment

Referring to fig. 1 and 2, the clean high-temperature box of the present embodiment includes an outer box 10, an inner box 20 and a heating device, the inner box 20 is disposed in the outer box 10, an air jacket 11 is formed between an inner wall of the outer box 10 and an outer wall of the inner box 20, the inner box 20 is hollow and forms a receiving cavity 21, the inner box 20 is provided with at least one air return opening 22 communicating the air jacket 11 with the receiving cavity 21, the air in the air jacket 11 can flow into the receiving cavity 21 along the air return opening 22, preferably, the top and two side walls of the inner box 20 are respectively provided with the air return openings 22, so that the air in the air jacket 11 can flow into the receiving cavity 21 along the directions of the top and two side walls of the inner box 20. The heating device is used for heating the gas in the air jacket 11 to ensure that the gas in the air jacket 11 is heated and can be constantly maintained at a preset temperature, so that the accommodating cavity 21 is indirectly heated. When the device is used, the temperature of the gas in the air jacket 11 is raised, so that the top and the two side walls of the inner box body 20 can be preheated in the process that the high-temperature gas in the air jacket 11 flows into the accommodating cavity 21, the temperature of the accommodating cavity 21 is adjusted in the process that the gas in the air jacket 11 flows into the accommodating cavity 21, and the heating efficiency of the accommodating cavity 21 is improved.

Preferably, the outer box 10 and the inner box 20 are respectively provided with a door, and the door of the outer box 10 and the door of the inner box 20 are sequentially opened to place a product (not shown) to be tested, which is generally a high-precision electronic component, into the accommodating cavity 21. Of course, in other embodiments, the door of the outer box 10 and the door of the inner box 20 may be an integrated structure, that is, when the door of the outer box 10 is opened, the product to be tested can be directly placed into the receiving cavity 21, and after the door of the outer box 10 is closed, the receiving cavity 21 and the air jacket 11 can be kept sealed independently except for the air return opening 22.

Preferably, the outer case 10 is opened with a first exhaust port 13 connected to the air jacket 11, the gas can selectively flow out from the first exhaust port 13, and when the gas flows from the accommodating cavity 21 to the air jacket 11 through the return air port 22, the temperature of the gas in the air jacket 11 can be controlled by the heating device, so as to realize indirect adjustment of the temperature of the accommodating cavity 21 by the air jacket 11. Wherein, when gaseous when being heated the inflation, first gas vent 13 can the exhaust part gas, avoids interior box 20 and outer box 10 pressurized deformation, and first gas vent 13 plays the effect of pressure release promptly.

Preferably, the clean high temperature box further comprises a circulating device 40, the air jacket 11 and the receiving cavity 21 together form an airtight cavity through the air return opening 22, and the circulating device 40 is used for driving the gas in the airtight cavity to circularly flow so as to improve the replacement efficiency of the gas in the airtight cavity and the temperature uniformity in all directions of the air jacket 11, so as to ensure that the air jacket 11 can uniformly preheat and indirectly regulate the temperature of the receiving cavity 21.

Preferably, the outer casing 10 is opened with an air inlet 14 communicated with the air jacket 11, the inner casing 20 is opened with a second air outlet 23 communicated with the housing cavity 21, and the inert gas selectively flows into the airtight cavity through the air inlet 14 and flows out from the second air outlet 23. Since the inert gas flows into the air jacket 11, flows into the receiving cavity 21 from the air jacket 11, and flows out from the receiving cavity 21, the design enables the inert gas to flow along the entire airtight cavity (i.e., through the air jacket 11 and the receiving cavity 21). The temperature in the airtight cavity is rapidly reduced by injecting a large amount of inert gas into the airtight cavity. It will be understood that the gas inlet 14 is connected to the gas outlet of the inert gas supply device through a corresponding pipe, and the second gas outlet 23 is connected to the recovery port of the inert gas supply device through a corresponding pipe, preferably, the inert gas injected into the housing chamber 21 is generally nitrogen. In addition, when the exhaust is performed, the first exhaust port 13 and the second exhaust port 23 simultaneously exhaust the inert gas, so that the exhaust efficiency is high, and the temperature change caused by the exhaust is reduced.

Further, the clean high temperature box of this embodiment further includes a housing 50, the outer box 10 is disposed in the housing 50, and an insulating layer 51 is formed between the inner wall of the housing 50 and the outer wall of the outer box 10, and the insulating layer 51 is isolated from the air jacket 11. Specifically, the insulating layer 51 is filled with an insulating material, and of course, in other embodiments, the insulating layer 51 is filled with air or is hollow. Through addding heat preservation 51, can effectively reduce the heat speed of scattering and disappearing of air jacket 11 to can further avoid the external environment to the influence that environmental test caused, effectively promote the test accuracy.

Preferably, the housing 50 is provided with a hatch, and the hatch of the housing 50, the hatch of the outer box 10 and the hatch of the inner box 20 are integrated, that is, when the hatch of the housing 50 is opened, the product to be tested can be directly placed into the accommodating cavity 21, and after the hatch of the housing 50 is closed, the insulation layer 51 and the air jacket 11 can be kept sealed independently.

Furthermore, the first exhaust port 13, the air inlet 14 and the second exhaust port 23 of this embodiment are respectively provided with an independently controlled check valve, on the one hand, the flow direction of the corresponding gas is limited, on the other hand, the first exhaust port 13 can be closed alone, or the air inlet 14 and the second exhaust port 23 can be closed alone, so that the clean high-temperature box of this embodiment can properly release the pressure of the airtight cavity through the first exhaust port 13, and a large amount of inert gas can be replaced for the airtight cavity through the air inlet 14 and the second exhaust port 23 to realize the cooling, so as to meet more cooling requirements and ensure the cleanliness of the interior.

It is understood that the check valves of the first exhaust port 13, the intake port 14 and the second exhaust port 23 may be manually controlled or automatically controlled by electronics, and are not limited thereto.

The use of the clean hot box of the present embodiment is explained in detail below:

1. the product to be tested is placed in the accommodating cavity 21.

2. Closing the one-way valves corresponding to the first exhaust port 13, the air inlet 14 and the second exhaust port 23, respectively, starting the circulating device 40 and the heating device, heating the air in the air jacket 11 by the heating device, driving the air to circularly flow in the closed cavity by the circulating device 40, preheating the top and two side walls of the inner box body 20 when the high-temperature gas in the air jacket 11 flows into the accommodating cavity 21, adjusting the temperature of the accommodating cavity 21 when the gas in the air jacket 11 flows into the accommodating cavity 21, and ensuring the uniformity of the temperature of the accommodating cavity 21.

3. When the test is finished and the product to be tested needs to be cooled and taken out, the one-way valves corresponding to the air inlet 14 and the second air outlet 23 can be opened, a large amount of nitrogen is injected into the air jacket 11 to replace the original air in the air jacket 11, meanwhile, the circulating device 40 is started to drive the nitrogen to circularly flow in the air jacket 11, the replacement speed is increased, at the moment, the temperature in the air jacket 11 is sharply reduced, so that the temperature of the accommodating cavity 21 is indirectly reduced, and the cooling operation of the accommodating cavity 21 is realized.

4. When the temperature in the accommodating cavity 21 is reduced to a preset value, the cabin door is opened, the product to be tested is taken out, and the test is completed.

Second embodiment

Referring to fig. 3 and 4, the present embodiment is different from the first embodiment in that the clean box of the present embodiment further includes a filtering device for filtering impurities of the gas entering the receiving cavity 21 along the air return opening 22. Preferably, the filtering means comprises two filters 30, the filters 30 being mounted on the return air openings 22 of the corresponding side walls of the inner casing 20 to filter the gas/inert gas flowing from the air jacket 11 into the housing chamber 21. Through circulating device 40 and filter equipment's cooperation, can accept the gas/inert gas of chamber 21 to the entering and clean, effectively guarantee the cleanliness factor of inner box. It should be noted that, in this embodiment, a filter screen may be used instead of the filter 30 to reduce the cost of the cleaning box.

1. the product to be tested is placed in the accommodating cavity 21.

2. Closing the one-way valves corresponding to the first exhaust port 13, the air inlet 14 and the second exhaust port 23, respectively, starting the circulating device 40, the heating device and the filtering device, wherein the heating device heats the air in the air jacket 11, the circulating device 40 drives the air with a preset temperature to circularly flow in the closed cavity, the top and two side walls of the inner box body 20 are preheated when the high-temperature gas in the air jacket 11 flows into the accommodating cavity 21, the temperature of the accommodating cavity 21 is adjusted and the uniformity of the temperature of the accommodating cavity 21 is ensured when the gas in the air jacket 11 flows into the accommodating cavity 21, and the gas is purified under the action of the filtering device in the flowing process of the gas.

3. When the test is finished and the product to be tested needs to be cooled and taken out, the one-way valves corresponding to the air inlet 14 and the second air outlet 23 are opened, a large amount of nitrogen is injected into the air jacket 11 to replace the original air in the air jacket 11, meanwhile, the circulating device 40 is started to drive the nitrogen to circularly flow in the air jacket 11, the replacing speed is increased, at the moment, the temperature in the air jacket 11 is sharply reduced, so that the temperature of the accommodating cavity 21 is indirectly reduced, and the cooling operation of the accommodating cavity 21 is realized.

Referring to fig. 1 to 4, an air jacket 11 is formed between an inner wall of an outer box 10 and an outer wall of an inner box 20, the inner box 20 is hollow and forms a receiving cavity 21, the inner box 20 is provided with at least one air return opening 22 communicating the air jacket 11 with the receiving cavity 21, air in the air jacket 11 can flow into the receiving cavity 21 along the air return opening 22, the air in the air jacket 11 is heated by a heating device, so that the temperature of the receiving cavity 21 is indirectly raised by the air jacket 11, and the air flows into the receiving cavity 21 along the air return opening 22 to preheat the receiving cavity 21, thereby ensuring that the receiving cavity 21 has better temperature uniformity, and enabling the clean high temperature box to provide a stable simulated test environment.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.

Claims

1. A clean high temperature box which is characterized in that: the air-conditioning box comprises an outer box body (10), an inner box body (20) and a heating device, wherein the inner box body (20) is arranged in the outer box body (10), an air jacket (11) is formed between the inner wall of the outer box body (10) and the outer wall of the inner box body (20), the inner box body (20) is of a hollow structure and forms an accommodating cavity (21), at least one air return opening (22) communicated with the air jacket (11) and the accommodating cavity (21) is formed in the inner box body (20), air in the air jacket (11) can flow into the accommodating cavity (21) along the air return opening (22), and the heating device is used for heating the air in the air jacket (11) so as to indirectly adjust the temperature of the accommodating cavity (21).

2. The clean high-temperature box according to claim 1, wherein: the outer box body (10) is provided with a first exhaust port (13) communicated with the air jacket (11), and gas can selectively flow out from the first exhaust port (13).

3. The clean high-temperature box according to claim 1, wherein: the air filter further comprises a filtering device, and the filtering device is used for filtering impurities of the air entering the containing cavity (21) along the air return opening (22).

4. The clean hot box of claim 3, wherein: the top and two side walls of the inner box body (20) are respectively provided with the air return openings (22).

5. The clean hot box of claim 4, wherein: the filtering device comprises two filters (30), and the filters (30) are arranged on the air return openings (22) on the corresponding side walls of the inner box body (20).

6. The clean high-temperature box according to claim 2, wherein: the air circulation device is characterized by further comprising a circulating device (40), the air jacket (11) and the accommodating cavity (21) jointly form an airtight cavity through the air return opening (22), and the circulating device (40) is used for driving gas in the airtight cavity to circularly flow.

7. The clean high-temperature box according to claim 6, wherein: the outer box body (10) is provided with an air inlet (14) communicated with the air jacket (11), the inner box body (20) is provided with a second air outlet (23) communicated with the accommodating cavity (21), and inert gas selectively flows into the airtight cavity through the air inlet (14) and flows out of the second air outlet (23).

8. The clean hot box of claim 7, wherein: the first exhaust port (13), the air inlet (14) and the second exhaust port (23) are respectively provided with an independently controlled one-way valve.

9. The clean high-temperature box according to claim 1, wherein: the box body is characterized by further comprising a shell (50), the outer box body (10) is arranged in the shell (50), a heat insulation layer is formed between the inner wall of the shell (50) and the outer wall of the outer box body (10), and the heat insulation layer and the air jacket (11) are mutually isolated.