Air duct structure of environmental test box

Abstract

The utility model relates to the technical field of environmental tests, in particular to an air duct structure of an environmental test box, which comprises a test box body and an air duct body arranged on one side of the test box body, and further comprises an air inlet arranged on one side of the test box body and connected with the air duct body. Air in the air duct body is guided into the test box body through the air inlet; according to the air duct structure of the environmental test box, when the air duct structure is used, compared with the prior art, under the condition of the same heat exchange area, the thickness of the condensation plate in the airflow flowing direction is reduced, the average heat exchange temperature difference between air and a refrigerant is increased, the heat exchange efficiency is improved, and the heat exchange efficiency is improved. The heat exchange efficiency of the evaporator is improved, the refrigerating capacity of a refrigerating system is fully exerted, under the condition of the same heat exchange area, the manufacturing cost of the evaporator is not changed, the efficiency is improved, the superheat degree of a refrigerant is improved, and the refrigerating system runs more stably.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental testing, in particular to an air duct structure of an environmental testing box. Background Art

[0002] The existing environmental test chamber air duct is generally a C-type air supply method. After the airflow of the test chamber enters the air duct, it first turns 90 degrees, then flows along the air duct and vertically passes over the evaporator and heater. The airflow exchanges heat with the refrigerant and heater inside the evaporator respectively, and finally turns 90 degrees after being pumped by the centrifugal fan and returns to the environmental chamber. Generally speaking, the air duct of the environmental test chamber is relatively narrow, and the size of the evaporator of the C-type air supply method in the airflow direction will be relatively large, resulting in an average heat exchange temperature difference between the refrigerant in the evaporator and the airflow is too small, which seriously affects the heat exchange efficiency of the evaporator and limits the refrigeration potential of the refrigeration system. For this reason, we propose an environmental test chamber air duct structure. Utility Model Content

[0003] A technical problem to be solved by the present application is: to increase the windward area of ​​the evaporator and the average heat exchange temperature difference between the refrigerant and the airflow inside the evaporator, so as to give full play to the refrigeration potential of the refrigeration system.

[0004] In order to solve the above-mentioned technical problems, an embodiment of the present application provides an environmental test chamber air duct structure, including a test chamber body and an air duct body arranged on one side of the test chamber body, and also including an air inlet, wherein the air inlet is arranged on one side of the test chamber body and connected to the air duct body, and the air inside the air duct body is guided into the test chamber body through the air inlet; an exchange component, wherein the exchange component is arranged in the air duct body, and the air in the air duct body is exchanged with heat through the exchange component; and an air supply component, wherein the air supply component is arranged in the air duct body, and the air circulation between the air duct body (2) and the test chamber body is controlled through the air supply component.

[0005] In some embodiments, the exchange element includes an evaporator disposed in the air duct body, through which the wind entering the air duct body is subjected to cold exchange, and a heater is disposed in the air duct body, through which the wind in the air duct body is subjected to heat exchange.

[0006] In some embodiments, the air supply assembly includes a circulation member disposed in the air duct body, and the circulation member is used to control the air flow between the test box body and the air duct body. The circulation member is provided with a driving member, and the driving member is used to drive the circulation member to work.

[0007] In some embodiments, the circulation part includes an air collecting bin arranged in the air duct body, the air collecting bin is connected to the air outlet, a plurality of volutes are arranged in the air collecting bin, the volute is connected to the air inlet, a wind wheel is rotatably arranged in the volute, a rigid shaft is arranged on the wind wheel, one end of the rigid shaft passes through the volute and the air duct body and is rotatably connected to the air duct body and the volute.

[0008] In some embodiments, the driving member includes a motor disposed on a rigid shaft, a plurality of the rigid shafts are each provided with a driving pulley, and a driving belt is disposed on the driving pulley.

[0009] The utility model has at least the following beneficial effects: when in use, the air duct structure of this environmental test chamber is different from the prior art in that under the same heat exchange area conditions, the thickness of the condensation plate in the air flow direction is reduced, the average heat exchange temperature difference between the air and the refrigerant is increased, the heat exchange efficiency of the evaporator is increased, and the refrigeration capacity of the refrigeration system is fully utilized. Under the same heat exchange area conditions, the manufacturing cost of the evaporator remains unchanged, the efficiency is improved, the superheat of the refrigerant is increased, the working condition of the refrigeration system is better controlled, and the operation of the refrigeration system is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 For this utility model Figure 1 Schematic diagram of the structure of the test chamber body;

[0012] Figure 3 For this utility model Figure 2 Schematic diagram of the cross-section structure;

[0013] Figure 4 This is a schematic diagram of the structure of the test box body of the utility model;

[0014] Figure 5 For this utility model Figure 2 Schematic diagram of the structure of the air duct body removed;

[0015] Figure 6 For this utility model Figure 5 Schematic diagram of the volute cross-section structure;

[0016] Figure 7 This is a schematic diagram of the structure of the second embodiment of the utility model;

[0017] Figure 8 This is a schematic diagram of the wind direction flow structure of the utility model.

[0018] In the figure: 1. test chamber body; 2. air duct body; 3. air inlet; 4. exchange part; 5. evaporator; 6. heater; 7. air supply assembly; 8. circulation part; 81. air collecting bin; 82. volute; 83. wind wheel; 84. rigid shaft; 9. driving part; 91. motor; 92. driving pulley; 93. driving belt; 10. air guide plate. DETAILED DESCRIPTION

[0019] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0020] See also Figure 1-6 , the utility model provides a technical solution:

[0021] An air duct structure of an environmental test chamber includes a test chamber body 1 and an air duct body 2 arranged on one side of the test chamber body 1, and also includes an air inlet 3. The air inlet 3 is arranged on one side of the test chamber body 1 and connected to the air duct body 2. The air inside the air duct body 2 is guided into the test chamber body 1 through the air inlet 3.

[0022] The exchange component 4 is arranged in the air duct body 2, and the air in the air duct body 2 is exchanged between cold and heat through the exchange component 4.

[0023] The windward area of ​​the condensation plate 55 is increased by disposing the exchange element 4, thereby increasing the heat exchange efficiency of the condensation plate 55, giving full play to the refrigeration potential of the refrigeration system, and improving the average heat exchange temperature difference ratio of the air.

[0024] The air supply component 7 is arranged in the air duct body 2, and the air supply component 7 controls the air circulation in the air duct body 2 and the test box body 1.

[0025] The advantage of setting up the air supply component 7 is that, under the same heat exchange area conditions, the thickness of the condensation plate 55 in the air flow direction is reduced, which increases the average heat exchange temperature difference between the air and the refrigerant, thereby increasing the heat exchange efficiency of the condensation plate 55, so that the refrigeration capacity of the refrigeration system can be fully utilized. At the same time, the increase in the air circulation distance in the heating chamber 61 also improves the heating efficiency of the air.

[0026] The exchange element 4 includes an evaporator 5 arranged in the air duct body 2, through which the air entering the air duct body 2 is subjected to cold exchange. A heater 6 is arranged in the air duct body 2, through which the air in the air duct body 2 is subjected to heat exchange.

[0027] The air supply assembly 7 includes a circulation member 8 disposed in the air duct body 2, through which the air flow in the test box body 1 and the air duct body 2 is controlled. A driving member 9 is disposed on the circulation member 8, and the driving member 9 drives the circulation member 8 to work.

[0028] The circulation part 8 includes an air collecting bin 81 arranged in the air duct body 2, and the air collecting bin 81 is connected to the air outlet 64. A plurality of volutes 82 are arranged in the air collecting bin 81, and the volutes 82 are connected to the air inlet 3. A wind wheel 83 is rotatably arranged in the volute 82, and a rigid shaft 84 is arranged on the wind wheel 83. One end of the rigid shaft 84 passes through the volute 82 and the air duct body 2 and is rotatably connected to the air duct body 2 and the volute 82.

[0029] The motor 91 starts to run, driving the wind wheel 83 to rotate. The rotation of the wind wheel 83 draws air into the volute 82 from the air inlet of the volute 82, and then discharges air from the air outlet of the volute 82, and is sent into the inner compartment of the test box body 1 through the air inlet 3.

[0030] The driving member 9 includes a motor 91 disposed on a rigid shaft 84 . A plurality of rigid shafts 84 are each provided with a driving pulley 92 , and a driving belt 93 is disposed on the driving pulley 92 .

[0031] When in use, after the test box body 1 starts to run, the motor 91 starts to run, driving the wind wheel 83 to rotate. The rotation of the wind wheel 83 sucks air into the volute 82 from the air inlet of the volute 82, and then discharges it from the air outlet of the volute 82, and is sent into the inner chamber of the test box body 1 through the air inlet 3, so that negative pressure is formed in the air collecting chamber 81, and further a low-pressure area is formed in the air duct body 2, and a high-pressure area is formed in the inner chamber of the test box body 1. A pressure difference is formed between the inner chamber of the test box body 1 and the air duct body 2, and the air in the inner chamber of the test box body 1 enters the air duct through the condensation plate 55, and then returns to the volute 82 through the heating tube 63, and is then sent into the inner chamber of the test box body 1 through the air inlet 3, forming a cycle. Example 2

[0032] See also Figure 7 , the present invention provides a technical solution:

[0033] Different from the first embodiment, an air guide plate 10 is provided on the condensing chamber 53. The air guide plate 10 can push the air blown toward the condensing chamber 53 toward the evaporator 55, thereby improving the heat exchange efficiency.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air duct structure of an environmental test chamber, comprising a test chamber body (1) and an air duct body (2) arranged on one side of the test chamber body (1), characterized in that: Also includes; An air inlet (3), the air inlet (3) being arranged on one side of the test box body (1) and connected to the air duct body (2), and guiding the air inside the air duct body (2) into the test box body (1) through the air inlet (3); An exchange component (4), the exchange component (4) being arranged in the air duct body (2), and performing cold and heat exchange on the air in the air duct body (2) through the exchange component (4); An air supply component (7) is arranged in the air duct body (2) through the air supply component (7), and the air circulation in the air duct body (2) and the test chamber body (1) is controlled by the air supply component (7): The exchange element (4) comprises an evaporator (5) arranged in the air duct body (2), and the air entering the air duct body (2) is subjected to cold exchange through the evaporator (5); a heater (6) is arranged in the air duct body (2), and the air in the air duct body (2) is subjected to heat exchange through the heater (6); The air supply assembly (7) comprises a circulation member (8) arranged in the air duct body (2), and the circulation member (8) controls the air flow between the test box body (1) and the air duct body (2); the circulation member (8) is provided with a driving member (9), and the driving member (9) drives the circulation member (8) to work; The circulation member (8) comprises an air collecting bin (81) arranged in the air duct body (2), the air collecting bin (81) being connected to the air outlet (64), a plurality of volutes (82) being arranged in the air collecting bin (81), the volutes (82) being connected to the air inlet (3), a wind wheel (83) being rotatably arranged in the volute (82), a rigid shaft (84) being arranged on the wind wheel (83), one end of the rigid shaft (84) passing through the volute (82) and the air duct body (2) and being rotatably connected to the air duct body (2) and the volute (82).

2. The air duct structure of the environmental test chamber according to claim 1, characterized in that: The driving member (9) comprises a motor (91) arranged on a rigid shaft (84), a plurality of rigid shafts (84) are each provided with a driving pulley (92), and a driving belt (93) is provided on the driving pulley (92).

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