A new environmental test chamber with improved temperature uniformity

Abstract

The present invention discloses a new type of environmental test box for improving temperature uniformity, including a test box body, a blower, an air conditioner, a front panel of the air conditioner, an air guide plate, an air blowing plate and a lower air blowing port; the blower is arranged at the upper end of the left side of the test box body; the air conditioner is arranged below the blower, and the air conditioner front panel is arranged on the right side of the outer wall of the air conditioner; the air conditioner front panel and the blower form an air supply port, and the air conditioner front panel and the bottom end of the test box body form a return air port; the air guide plate is arranged at the air supply port; the air blowing plate is arranged on the right side of the air guide plate, and forms a lower air blowing port with the air conditioner front panel. This invention solves the problems of poor temperature uniformity and poor controllability of temperature changes in traditional test boxes, and solves the problem of reduced wind speed on the air conditioner side by arranging the air blowing plate, air guide plate and lower air blowing opening capable of adjusting air at the air blowing port above the air conditioner, thereby ensuring the uniformity of temperature on the air conditioner side and improving the controllability during temperature changes.

Description

Technical Field

[0001] The invention relates to the technical field of air supply structures of environmental test chambers, and in particular to a novel environmental test chamber for improving temperature uniformity. Background Art

[0002] In order to ensure the objectivity and reproducibility of the experiment, the environmental test chamber needs to have uniform temperature in the limited space inside. In order to ensure the high uniformity of the temperature inside the environmental test chamber, a certain amount of large air volume, air adjustment of the blowing or suction part, top blowing, bottom suction, and air volume adjustment with a frequency converter are required to achieve the required uniformity.

[0003] However, with the improvement of test level and sample reliability, the requirements for uniformity are also increasing. For example, the national standard uniformity requirement is that it can be met when the test chamber is unloaded. However, recently some customers require that the uniformity of each point near the sample and the controllability of the temperature change process must be met when the test chamber is loaded.

[0004] Therefore, if Figure 1 As shown, the air supply structure of the conventional environmental test chamber 101 is affected by the dynamic pressure of the blower 102, and the air velocity in the air conditioner 103 side cannot be increased. The temperature uniformity and controllability of the temperature change process on the air conditioner 103 side are worse or slower than those on the door 104 side, and cannot meet customer requirements.

[0005] In addition, when viewed from the door 104 of the environmental test chamber 1, the air volume in the center is large, while the air volume on the left and right sides is small, so the temperature in the center changes quickly, while the temperature on the sides changes slowly. Summary of the invention

[0006] The purpose of the present invention is to provide a new type of environmental test chamber with improved temperature uniformity. This structure aims to solve the problems of poor temperature uniformity and poor controllability of temperature changes in traditional test chambers. By arranging a blowing plate, a wind guide plate and a lower blowing port capable of adjusting air flow at the blowing port above the air conditioner, the problem of reduced wind speed on the air conditioner side is solved, the uniformity of temperature on the air conditioner side is ensured, and the controllability during temperature changes is improved.

[0007] To achieve the above-mentioned purpose, the present invention provides a new type of environmental test box for improving temperature uniformity, comprising a test box body, an air supply fan, an air conditioner, an air conditioner front panel, an air guide plate, an air blowing plate and a lower air blowing port; the air supply fan is arranged through the upper end of the left side of the test box body, and is used to deliver air to the environmental test box; the air conditioner is arranged below the air supply fan, and an air conditioner front panel is arranged on the right side of the outer wall of the air conditioner; the air conditioner front panel and the air supply fan above form an air supply port, and the air conditioner front panel and the bottom end of the test box body form a return air port; the air guide plate is arranged at the air supply port, and the wind direction of the air blowing is changed by adjusting the air guide plate; the air blowing plate is arranged on the right side of the air guide plate, and forms a lower air blowing port with the air conditioner front panel;

[0008] The wind blowing with the wind direction changed by the air guide plate is divided into two paths; the first path of wind blowing with the wind direction changed is adjusted by the air blowing plate to obtain wind with uniform temperature, and is blown into the interior of the test chamber body; the second path of wind blowing with the wind direction changed is directly blown into the air conditioner side inside the test chamber body through the lower air blowing port, thereby improving the temperature uniformity and controllability of the air conditioner side inside the test chamber body.

[0009] Most preferably, the air suction plate is arranged at the return air outlet and connected to the bottom end of the air conditioner, so as to absorb the air inside the test box body, cool and heat the air conditioner to obtain hot air, and transport it back to the air supply fan to form a closed loop.

[0010] Most preferably, the blowing plate comprises:

[0011] The air regulating plates are distributed in a grid shape at both ends of the blowing plate, and are used to adjust the temperature of the guided blowing air and improve the temperature uniformity of the guided blowing air; the porous plate is arranged in the central position of the blowing plate; the cover plate is distributed at the central bottom end of the blowing plate; the porous plate and the cover plate jointly adjust the air volume of the guided blowing air.

[0012] Most preferably, the porous plate and the cover plate are both in the shape of a grid.

[0013] Most preferably, the porous plate and the cover plate are both in the shape of strips.

[0014] Most preferably, there are multiple cover plates.

[0015] The use of this invention solves the problems of poor temperature uniformity and poor controllability of temperature changes in traditional test chambers. By arranging a blowing plate, an air guide plate and a lower blowing port that can adjust the air at the blowing port above the air conditioner, the problem of reduced wind speed on the side of the air conditioner is solved, the uniformity of the temperature on the side of the air conditioner is ensured, and the controllability during the temperature change process is improved.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention solves the problem of reduced wind speed on the side of the air conditioner by arranging a blowing plate and an air guide plate capable of adjusting air flow at the air outlet above the air conditioner, ensures the uniformity of the temperature on the side of the air conditioner, and improves the controllability during the temperature change process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the air supply structure of a traditional environmental test chamber;

[0019] Figure 2 A schematic diagram of a novel environmental test chamber provided by the present invention;

[0020] Figure 3 A partial structural schematic diagram of a novel environmental test chamber provided by the present invention;

[0021] Figure 4 A schematic diagram of the structure of a porous plate and a cover plate in another embodiment provided by the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention and are not intended to limit the protection scope of the present invention.

[0023] The present invention provides a new environmental test chamber with improved temperature uniformity, such as Figure 2 As shown, the test box includes a test box body 1, a box door 2, a blower, an air conditioner, an air conditioner front panel 5, an air guide plate 4, an air blowing plate 3, an air suction plate 6 and a lower air blowing port 12.

[0024] The blower is arranged at the upper end of the left side of the test box body 1, and is used to deliver blowing air to the test box body 1; the air conditioner is arranged below the blower; and the right outer wall of the air conditioner is provided with an air conditioner front panel 5, and the air conditioner front panel 5 forms an air supply port with the blower above, and forms an air return port with the bottom end of the test box 1; the air guide plate 4 is arranged at the air supply port, and the wind direction of the blowing air is changed by adjusting the air guide plate 4; the blowing plate 3 is arranged on the right side of the air guide plate 4, and forms a lower blowing port 12 with the air conditioner front panel 5;

[0025] The wind blowing with the wind direction changed by the air guide plate 4 is divided into two paths; the first path of wind blowing with the wind direction changed is adjusted by the air blowing plate 3 to obtain air with uniform temperature, and is blown into the inside of the test box 1. By adjusting the angle of the air blowing plate 3 during the air adjustment process, the wind direction can be adjusted more delicately; the second path of wind blowing with the wind direction changed is directly blown into the air conditioner side inside the test box body 1 through the lower air blowing port 12, so as to improve the temperature uniformity and controllability of the air conditioner side inside the test box body 1; the air suction plate 6 is arranged at the return air port and connected to the bottom end of the air conditioner, so as to absorb the air inside the test box body 1, cool and heat it through the air conditioner, obtain hot air, and transport it back to the supply fan to form a closed loop. Among them, the air conditioner includes a refrigerator 11, an evaporator 10 and a heater 9; the refrigerator 11 passes through the left side wall of the test box body 1; the evaporator 10 is arranged on the inner wall of the bottom end of the left side of the test box body 1, the first end is connected to the air suction plate 6, connected to the return air port, and the second end is connected to the refrigerator 11, and works together with the refrigerator 11 to cool the air inside the test box body to obtain cold air; the heater 9 is arranged above the evaporator 10, and is used to heat the cold air to obtain hot air, and transmit it back to the supply fan.

[0026] The blower includes a blower body 8 and a blower motor 7; the blower body 8 is arranged at the top left side of the inside of the test box body 1, and is used to deliver air to the inside of the test box body 1; the blower motor 7 is arranged at the top outer side of the test box body 1 and is connected to the blower body 8 to provide power for the blower body 8.

[0027] The blowing plate 3 includes an air regulating plate 301, a porous plate 302 and a cover plate 303; the air regulating plates 301 are distributed in a grid shape at both ends of the blowing plate 3, and are used to adjust the temperature of the first blowing air with changed wind direction, so as to improve the temperature uniformity of the first blowing air with changed wind direction; the porous plate 302 is arranged at the central position of the blowing plate 3; the cover plate 303 is distributed at the central bottom end of the blowing plate 3; there are multiple cover plates 303.

[0028] The porous plate 302 and the cover plate 303 jointly adjust the air volume of the first blowing direction, cover the central part of the blowing plate 3, and locally reduce the air volume in the central part of the blowing plate 3, so as to achieve the temperature uniformity of the effective space of the test box body 1 and the controllability of the temperature change process.

[0029] The shapes of the porous plate 302 and the cover plate 303 are related to factors such as the air volume of the blower, the size of the test box body 1, the size of the blowing plate, and the test requirements.

[0030] like Figure 3 As shown, in this embodiment, the shape of the porous plate 302 and the cover plate 303 is a grid; in another embodiment, as shown in FIG. Figure 4 As shown, the porous plate 302 and the cover plate 303 are in the shape of strips.

[0031] The blowing plate 3 can perform air conditioning processing, effectively adjusting the air volume below the air supply port, thereby adjusting the wind speed of each temperature distribution point blown into the effective space inside the test box body 1, and achieving temperature uniformity and controllability of the blowing air.

[0032] A door 2 is further provided on the right side of the test box body 1 . By opening and closing the door 2 , the experimental sample 13 is placed inside the test box body 1 to detect the temperature distribution inside the test box body 1 .

[0033] like Figure 3 As shown, in this embodiment, on the right side of the air conditioner front panel 5 of the test box body 1, as viewed from the side of the box door 2, 4 groups of experimental samples 13 are evenly distributed, and the 4 groups of experimental samples 13 divide the effective space inside the test box body 1 into five distribution space areas ae; each distribution space area ae has Figure 2 The six distribution points (A) to (F) on the elevation diagram are used to detect the temperature uniformity of the six distribution points (A) to (F) inside the test chamber body 1.

[0034] The wind delivered by the blower changes its direction through the air guide plate 4, and the wind with changed direction is divided into two paths; the first path of wind with changed direction is adjusted through the blowing plate 3 to obtain wind with uniform temperature, and is blown to the experimental sample 13 at the six distribution points (A)-(F) inside the test box body 1; the second path of wind with changed direction is directly blown into the distribution points (A) and (D) on the air conditioner side inside the test box body 1 through the lower air blowing port 12, so as to improve the temperature uniformity and controllability on the air conditioner side; then the wind inside the test box body 1 passes through the suction plate 6 at the bottom and returns to the air conditioner through the return air port, and after being cooled by the refrigerator 11 and the evaporator 10 of the air conditioner and heated by the heater, the hot wind is obtained and transmitted back to the blower.

[0035] Among them, the wind speed at the positions of points (B), (C), (E) and (F) is easy to control. Through the air adjustment processing of the blowing plate 3, the temperature of the six points (A)-(F) can be finely adjusted.

[0036] The second way of changing the wind direction by the air guide plate 4 and the lower air outlet 12 forces the air to flow to the positions of point (A) and point (D); by adjusting the air through the air blowing plate 3, the blowing area is reduced, and the air volume at the positions of point (A) and point (D) below the air blowing plate 3 is increased, thereby being able to adjust the temperature uniformity of point (A) and point (D).

[0037] like Figure 3As shown, viewed from the right side of the test chamber body 1, the air volume in the central part of the air outlet is larger than that in the left and right parts. Therefore, the temperature in the central part of the test chamber body 1 changes quickly, while the temperature in the two side parts changes slowly, that is, the temperature in the b, c, d areas changes quickly, while the temperature in the a, e areas changes slowly. Accordingly, there is a difference in the temperature uniformity between the b, c, d areas and the a, e areas.

[0038] By covering the central part of the blowing plate 3 with the porous plate 302 and the cover plate 303, the temperature change rate in the areas b, c, and d can be effectively slowed down, and the change rate differences and temperature differences in other areas can be reduced.

[0039] Working principle of the present invention:

[0040] The wind delivered by the blower changes its direction through the air guide plate, and the wind with changed direction is divided into two routes; the first route of wind with changed direction is adjusted through the blowing plate to obtain wind with uniform temperature, and blown to the test space at six distribution points (A)-(F) inside the test box; the second route of wind with changed direction is directly blown into the distribution points (A) and (D) on the air conditioner side inside the test box body through the lower air outlet, so as to improve the temperature uniformity and controllability of the air conditioner side on the right side of the front panel of the air conditioner; then the wind inside the test box body passes through the air suction plate at the bottom and returns to the air conditioner through the return air outlet, and after being cooled by the refrigerator and evaporator of the air conditioner and heated by the heater, the hot wind is obtained and transmitted back to the blower.

[0041] In summary, the present invention is a new type of environmental test chamber with improved temperature uniformity, which solves the problems of poor temperature uniformity and poor controllability of temperature changes in traditional test chambers. By arranging a blowing plate, an air guide plate and a lower blowing port capable of adjusting air flow at the blowing port above the air conditioner, the problem of reduced wind speed on the air conditioner side is solved, the uniformity of the temperature on the side of the air conditioner is ensured, and the controllability during the temperature change process is improved.

[0042] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A new environmental test chamber for improving temperature uniformity, characterized in that: include: Test chamber body; A blower, which is arranged on the upper end of the left side of the test chamber body and is used to deliver blow air to the environmental test chamber; An air conditioner is arranged below the blower, and an air conditioner front panel is arranged on the right side of the outer wall of the air conditioner; the air conditioner front panel and the blower form an air supply port, and the air conditioner front panel and the bottom end of the test box body form an air return port; An air guide plate is arranged at the air outlet, and the wind direction of the air blowing can be changed by adjusting the air guide plate; The blowing plate is arranged on the right side of the air guide plate and forms a lower blowing port with the front panel of the air conditioner; the blowing of the wind direction changed by the air guide plate is divided into two paths; the blowing of the first path with the wind direction changed passes through the blowing plate, undergoes air conditioning treatment, obtains the blowing of uniform temperature, and blows into the interior of the test box body; the blowing of the second path with the wind direction changed passes through the lower blowing port and directly blows into the air conditioner side inside the test box body, thereby improving the temperature uniformity and controllability of the air conditioner side inside the test box body; The environmental test box is also provided with an air suction plate; the air suction plate is provided at the return air port and connected to the bottom end of the air conditioner, and is used to absorb the blowing air inside the test box body, and is cooled and heated by the air conditioner to obtain hot blowing air, and is transported back to the air blower to form a closed loop; The blowing plate comprises: Air regulating plates are distributed in a grid shape at both ends of the air blowing plate, and are used to adjust the temperature of the guided air blowing to improve the temperature uniformity of the guided air blowing; A porous plate, arranged at the center of the blowing plate; A cover plate, disposed at the central bottom end of the blowing plate; The porous plate and the cover plate jointly adjust the air volume of the guided air.

2. The novel environmental test chamber for improving temperature uniformity as claimed in claim 1, characterized in that: The porous plate and the cover plate are both in a grid shape.

3. The novel environmental test chamber for improving temperature uniformity as claimed in claim 1, characterized in that: The porous plate and the cover plate are both in strip shape.

4. The novel environmental test chamber for improving temperature uniformity as claimed in claim 1, characterized in that: There are multiple cover plates.

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