Airflow nozzle structure for controlling heating and cooling rate of environmental chamber

Abstract

The utility model provides an airflow nozzle structure for controlling the heating and cooling rate of an environmental chamber. The airflow nozzle structure comprises an upper-layer pore plate (5) and a lower-layer pore plate (6), holes are formed in the upper-layer pore plate (5) and the lower-layer pore plate (6), and the upper-layer pore plate (5) and the lower-layer pore plate (6) are arranged above the test area (8); the upper-layer pore plate (5) is fixed, the lower-layer pore plate (6) is movably arranged, and the pore opening area of the two layers of pore plates can be adjusted by moving the lower-layer pore plate (6); and a downward protruding nozzle is arranged at the opening of the lower-layer pore plate (6). And an adjustable double-layer orifice plate nozzle structure is used, so that the temperature increasing and decreasing rate of a local area of the environment test chamber can be controlled.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of environmental test equipment, concretely relates to an air flow spout structure of control environment cabin temperature rising rate. BACKGROUND

[0002] High-low temperature environment cabin or high-low temperature environment box is the equipment for high-low temperature test of electronic products under normal pressure. The difference between the two is mainly that the size of environment cabin is larger and the size of environment box is smaller. When testing, the test piece is placed in the high-low temperature environment cabin or high-low temperature environment box to carry out high temperature test, low temperature test or high-low temperature alternating test.

[0003] In the prior art, patent CN107063725A, a kind of air conditioning refrigeration equipment performance test environment cabin, as shown in Figure 1 The air flow circulation mode of upper air supply and upper air return is adopted, uniform and stable air flow and temperature and humidity control are realized through air supply hole plate and air return hole plate, and the design problem of air inlet around the measured machine and air outlet in the middle is solved. At the same time, the perforation rate and aperture of air supply hole plate and air return hole plate are different, and the large perforation rate of air supply hole plate can improve the uniformity of air flow and temperature and humidity of test environment cabin. The first section of air return channel can avoid the air return flow gathering in the upper middle of test section, so that the temperature of the upper middle area of test section is obviously higher than other places, and the distribution of air flow temperature in test section tends to be more uniform. The air supply port of air handling unit is located at the top, which can avoid the situation that the wind speed is too large at the air supply port and the wind speed is too small far away from the air supply port, and ensure that the air flow is uniformly and stably distributed.

[0004] Patent CN106290124A, an environment box with variable wind field uniformity, as shown in Figure 2 The air outlet plate is spliced by a plurality of perforated plates, and the outer side of each perforated plate is provided with a fan baffle capable of shielding the through hole of the perforated plate. By controlling the opening and closing of the fan baffle, the air exchange and closing of the perforated plate can be switched, so that the wind field uniformity of the entire box can be conveniently and flexibly changed, and the temperature distribution of the entire box can be controlled, so that the tested product can be tested comprehensively, the product testing demand can be met, and a more comprehensive testing effect can be achieved.

[0005] The existing technology mainly studies the uniformity of temperature, and does not study the temperature rising and falling rate of the test piece product. A typical method of temperature change rate of high-low temperature environment cabin is to control the wind speed by using variable frequency fan. However, the initial investment is large. For the solution of controlling the local temperature rising and falling rate, one method is to set a special air duct to send the circulating air to the vicinity of the test piece, but the operation is not convenient, a heavy air duct is needed, and the air duct increases the overall appearance of the environment cabin; another method is to control the rotating speed of the fan by using variable frequency fan to control the wind speed; the third method is to control the evaporation and heat exchange temperature of the cold air fan or heat exchanger. UTILITY MODEL CONTENT

[0006] The utility model provides a kind of airflow spout structure of control environment cabin temperature rising rate, it is applicable to the temperature control and flow field control of high-low environment test cabin or high-low environment test box, using adjustable double-layer orifice plate spout structure, the temperature rising rate of local area of environment test cabin can be controlled.

[0007] The utility model provides a kind of airflow spout structure of control environment cabin temperature rising rate, it includes: upper layer orifice plate 5, lower layer orifice plate 6;

[0008] Upper layer orifice plate 5, lower layer orifice plate 6 are provided with opening, and upper layer orifice plate 5, lower layer orifice plate 6 are arranged above test area 8;

[0009] Upper layer orifice plate 5 is fixed, and lower layer orifice plate 6 is movably arranged, and the opening area of the opening of two layers of orifice plates is adjustable by moving lower layer orifice plate 6;

[0010] The opening of lower layer orifice plate 6 is provided with the spout that protrudes downward.

[0011] Optionally, lower layer orifice plate 6 includes a plurality of sub-blocks.

[0012] Optionally, the airflow spout structure is applied to environment test cabin;

[0013] Test cabin further includes: air return orifice plate 7, air duct, and circulating fan 1, refrigeration unit heat exchanger 2, heater 3, humidifier 4 arranged in air duct;

[0014] Air return orifice plate 7 is arranged at the bottom of air duct and is located at the side of test area 8, and circulating fan 1 is arranged behind air return orifice plate 7;

[0015] Refrigeration unit heat exchanger 2, heater 3 and humidifier 4 are arranged above fan 1 from bottom to top;

[0016] Upper layer orifice plate 5 and lower layer orifice plate 6 are located at the end of air duct.

[0017] Optionally, upper layer orifice plate 5 is in contact with lower layer orifice plate 6.

[0018] Optionally, lower layer orifice plate 6 is locked on upper layer orifice plate 5 using long slot and bolt.

[0019] Optionally, upper layer orifice plate 5 and lower layer orifice plate 6 have the same opening rate.

[0020] Optionally, the opening rate is 30% to 70%.

[0021] The utility model provides a kind of airflow spout structure of control environment cabin temperature rising rate, it is a novel adjustable double-layer orifice plate spout structure form, can control the temperature rising rate of environment test cabin under less energy consumption and initial investment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the structure of an existing environmental chamber Figure 1 ;

[0023] Figure 2 is a schematic diagram of the structure of an existing environmental chamber Figure 2 ;

[0024] Figure 3 is a schematic diagram of the principle of half covering of the lower layer hole plate of the present application;

[0025] Figure 4 is a schematic diagram of the principle of zoned covering of the lower layer hole plate of the present application;

[0026] Figure 5 is a schematic diagram of the principle of zoned covering of the lower layer hole plate of the present application;

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 1. Circulating fan; 2. Heat exchanger of refrigerating unit; 3. Heater; 4. Humidifier; 5. Upper layer hole plate; 6. Lower layer hole plate; 7. Return air hole plate; 8. Test area. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] The features and illustrative embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without some of these specific details. The description of the embodiments is merely to provide a better understanding of the present application by showing examples of the present application. The present application is in no way limited to any specific settings and methods set forth below, but covers any improvements, replacements and modifications of structures, methods and devices without departing from the spirit of the present application. In the drawings and the following description, well-known structures and techniques are not shown to avoid unnecessary obscuring of the present application.

[0031] It should be noted that the features in the embodiments of the present application and the embodiments can be combined with each other without conflict, and each embodiment can be mutually referenced and quoted. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0032] The present application will be described in further detail below in combination with the embodiments and the drawings, but the implementation manner of the present application is not limited thereto.

[0033] The present application provides a kind of airflow spout structure for controlling the temperature rising rate of environment cabin, it is applicable to the temperature control and flow field control of high-low environment test cabin or high-low environment test box, using adjustable double-layer orifice plate spout structure, the temperature rising rate of local area of environment test cabin can be controlled.

[0034] The main structure of environment cabin includes cabin body, circulating fan, refrigerating unit heat exchanger, heater, humidifier, air supply port, return air port and the like. Among them, air supply port and return air port are respectively provided with orifice plate. Air supply port adopts double-layer orifice plate, upper orifice plate is fixed, lower orifice plate has downward protruding spout, lower orifice plate can be moved, the overlapping area of orifice plate is controlled, spout jet is controlled, so that the size and direction of gas flow velocity are controlled. So as to control the temperature rising rate of environment cabin.

[0035] It should be particularly noted that lower orifice plate adopts protruding spout, which can effectively control the direction of air supply to point directly below the test area. If there is no protruding spout, the wind direction will have a large deflection, which is not conducive to the temperature control of test area.

[0036] The fixation of lower orifice plate can adopt long strip hole and bolt locking.

[0037] The moving mode of lower orifice plate has two kinds, one is manual moving, which is more reliable, and human ladder is arranged in small environment cabin, and movable lifting platform is used in large environment cabin. The other is motor driving. The structure is complex, and it is more convenient.

[0038] Figure 1 It is a schematic diagram of half of lower orifice plate being covered. The direction and speed of air supply can be controlled, when half of the area of lower orifice plate is covered, the streamline slightly deflects to the right side, due to the protruding spout, the wind direction will not have a large deflection, the wind speed is increased while the flow direction is effectively controlled.

[0039] Figure 2 It is a schematic diagram of partitioned covering of lower orifice plate, only the spout of test part area is opened, and the spout of the remaining area is closed, the temperature rising and falling rate of different areas can be controlled, rapid temperature rising and falling in local area is realized.

[0040] Figure 3 It is an axonometric schematic diagram of double-layer orifice plate. The overlapping area accounts for 50% of the area of spout. Lower orifice plate adopts protruding spout.

[0041] The air outlet structure for controlling the temperature rising and falling rate of the environmental chamber is applied to the environmental test chamber equipment, which comprises a circulating fan 1, a refrigeration unit heat exchanger 2, a heater 3, a humidifier 4, an upper layer hole plate 5, a lower layer hole plate 6, a return air hole plate 7 and a test area 8.

[0042] The air supply structure for controlling the temperature rising and falling rate of the environmental chamber adopts a double-layer hole plate, which comprises the upper layer hole plate 5 and the lower layer hole plate 6. The upper layer hole plate 5 is in contact with the lower layer hole plate 6. The upper layer hole plate 5 is fixed, and the lower layer hole plate 6 is movable. The movement of the lower layer hole plate 6 can adjust the open area of the hole plate.

[0043] The control of the air supply speed is realized by two methods: one is to control the open area ratio (the ratio of the total area of the open hole to the total area of the air supply plate) of the upper layer hole plate 5 and the lower layer hole plate 6, and the same open area ratio facilitates the uniform overlapping of the open holes; the other is to control the overlapping area of the upper layer hole plate 5 and the lower layer hole plate 6. Under a certain air volume flow rate, through the combination of the fixed area and the variable area, a larger range of air supply speed control can be realized.

[0044] The commonly used open area ratio is 30% to 70%, and the air speed, structural strength and wind-induced vibration of the hole plate are comprehensively considered; the typical overlapping area can change between 0% and 80% of the area of the air outlet.

[0045] The fixation of the lower layer hole plate 6 can adopt long hole and bolt locking.

[0046] The movement mode of the lower layer hole plate 6 has two kinds, one is manual movement, which is more reliable, and a ladder is arranged in the small environmental chamber, and a movable lifting platform is used in the large environmental chamber. The other is motor-driven. The structure is complex, and it is more convenient.

[0047] When part of the area of the lower layer hole plate 6 is covered, the covering area of each partition is the same Figure 1 , the air supply direction and speed can be controlled as a whole, when half of the area of the lower layer hole plate 6 is covered, the flow line slightly deflects to the right side, and due to the protruding air outlet of the lower layer hole plate 6 Figure 3 , the wind direction will not be greatly deflected, the wind speed is increased, and the flow direction is effectively controlled.

[0048] When the lower layer hole plate 6 is partitioned and covered Figure 2 , only the air outlets of the tested part of the area are opened, and the air outlets of the remaining areas are closed, the temperature rising and falling rates of different areas can be controlled, and rapid temperature rising and falling in the local area can be realized. When the lower layer hole plate 6 is partitioned, the hole plates of the partitions are independently moved, and there is a movable gap between the adjacent partitions to prevent the interference of the hole plates.

[0049] The above merely illustrates the further embodiments of the present application, but the protection scope of the present application is not limited thereto, any skilled in the art can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the disclosed scope, which all belong to the protection scope of the present application.

Claims

1. An air jet structure for controlling the rate of temperature change of an environmental chamber, comprising: The application relates to an environmental test chamber. The upper layer hole plate (5) and the lower layer hole plate (6) are provided with openings; the upper layer hole plate (5) and the lower layer hole plate (6) are arranged above a test area (8); The upper layer hole plate (5) is fixed, and the lower layer hole plate (6) is movably arranged; the opening area of the openings of the two layer hole plates can be adjusted by moving the lower layer hole plate (6); The openings of the lower layer hole plate (6) are provided with downward protruding nozzles. The lower layer hole plate (6) comprises a plurality of sub-blocks.

2. The airflow jet structure for controlling the temperature change rate of an environmental chamber according to claim 1, wherein The air flow nozzle structure is applied to an environmental test chamber.

3. The airflow jet structure for controlling the temperature change rate of an environmental chamber according to claim 1, wherein The test chamber further comprises a return air hole plate (7), an air duct, a circulating fan (1), a refrigeration unit heat exchanger (2), a heater (3) and a humidifier (4) arranged in the air duct; The return air hole plate (7) is arranged at the bottom of the air duct and located at the side of the test area (8); the circulating fan (1) is arranged behind the return air hole plate (7); The refrigeration unit heat exchanger (2), the heater (3) and the humidifier (4) are arranged above the fan (1) from bottom to top; The upper layer hole plate (5) and the lower layer hole plate (6) are located at the end of the air duct. The upper layer hole plate (5) is in contact with the lower layer hole plate (6).

4. The airflow jet structure for controlling the temperature change rate of an environmental chamber according to claim 1, wherein The lower layer hole plate (6) is locked on the upper layer hole plate (5) by adopting a long strip hole and a bolt.

5. The airflow jet structure for controlling the temperature change rate of an environmental chamber according to claim 4, wherein The upper layer hole plate (5) and the lower layer hole plate (6) have the same opening rate.

6. The airflow jet structure for controlling the temperature change rate of an environmental chamber according to claim 1, wherein The opening rate is 30%-70%.

7. The airflow jet structure for controlling the temperature change rate of an environmental chamber according to claim 6, wherein ​

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