Vortex circulation type constant temperature and humidity test box

Abstract

The utility model provides a vortex circulation type constant-temperature and constant-humidity test box which comprises a box body, the interior of the box body is divided into a test cabin and a water storage grid, the test cabin is in a sealed cylindrical shape, a cross flow fan is arranged on the periphery of the test cabin, and an air supply port and an air return port of the cross flow fan are formed in the annular cabin wall of the test cabin, so that airflow circulates in a vortex mode in the test cabin; an evaporation heat exchange pipe and a heating net are arranged in an air duct of the cross flow fan, and the evaporation heat exchange pipe is connected with an air conditioning system through a pipeline; and the water storage cell is connected with a spray pipe extending into the test cabin. The test cabin is provided with an annular cabin wall, and an air supply opening and an air return opening are formed in the annular cabin wall, so that vortex circulating air taking a test sample as the center is formed in the cabin, the temperature and humidity in the space are quickly balanced, and the air noise can be effectively reduced; in the test cabin, the vortex circulating air blown out by the main cross-flow fan is relayed by the secondary cross-flow fan, so that the cross-flow fan can keep airflow vortex circulation at a low rotating speed, the electric energy is saved, and the air noise is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of testing equipment, in particular to a vortex circulation type constant temperature and humidity test box. Background Art

[0002] Constant temperature and humidity test chamber is a commonly used equipment in testing laboratories, which can provide a constant temperature and humidity environment for test items. Existing constant temperature and humidity test chambers are equipped with a square space inside. After the cold air, warm air and water mist enter the square space, they are mixed with the air in the chamber by a fan to adjust the temperature and humidity. One type of constant temperature and humidity test chamber on the market does not have a circulation channel for air flow. Under the action of the fan, the air forms turbulence in the square space; another type of constant temperature and humidity test chamber on the market will make an air duct outside the square space, install the fan in the air duct, and the circulating airflow enters from one side of the square space and flows out from the opposite side.

[0003] However, the air turbulence and air convection in the above-mentioned constant temperature and humidity test chambers cannot achieve the best constant temperature and humidity effect. A large volume of test samples may be placed in the constant temperature and humidity test chamber. The turbulence of the first constant temperature and humidity chamber cannot ensure that cold air, warm air and moisture are evenly diffused to any space in a very short time. If the fan speed is increased, it will also cause strong wind noise. In the second constant temperature and humidity test chamber, the airflow is unidirectionally convective, and there may be a temperature and humidity difference between the windward and leeward sides of the test sample, which takes a long time to gradually balance. In addition, the test sample in a relatively narrow square space will cause a strong obstruction to the circulating air, which will further affect the speed of temperature and humidity balance and generate a lot of wind noise. Utility Model Content

[0004] In view of the defects of the background technology, the utility model proposes a vortex circulation constant temperature and humidity test box, which can form vortex circulation wind to quickly balance the temperature and humidity in the space and can effectively reduce wind noise.

[0005] The utility model proposes a vortex circulation constant temperature and humidity test box, comprising a box body, wherein a test chamber and a water storage grid are separated in the box body, the test chamber is in a sealed cylindrical shape, a cross-flow fan is arranged at the periphery of the test chamber, and an air supply port and an air return port of the cross-flow fan are arranged on the annular bulkhead of the test chamber, so that the air flow vortexes and circulates in the test chamber;

[0006] The air duct of the cross-flow fan is provided with an evaporative heat exchange tube and a heating network, and the evaporative heat exchange tube is connected to the air conditioning system through a pipeline;

[0007] The water storage grid is connected to a spray pipe extending into the test chamber.

[0008] Preferably, a guide plate coaxially bent with the annular bulkhead is provided on the periphery of the air supply port.

[0009] Preferably, the test cabin is provided with one main cross flow fan and at least one secondary cross flow fan, the main cross flow fan and the secondary cross flow fan are evenly arranged on the periphery of the annular cabin wall, the power of the main cross flow fan is greater than that of the secondary cross flow fan, and the evaporative heat exchange tube and the heating network are arranged in the air duct of the main cross flow fan.

[0010] Preferably, the front end of the spray tube extends into the return air inlet of a secondary cross-flow fan.

[0011] Preferably, the air supply outlets and return air outlets of all cross flow fans are arranged alternately along the annular bulkhead.

[0012] Preferably, a test piece fixing frame is provided in the test chamber, and the test piece fixing frame includes a rear support arm and a front storage rack;

[0013] The rear support arm extends horizontally and is fixedly connected to the rear bulkhead of the test cabin;

[0014] The front storage rack is L-shaped and is installed at the front end of the rear support arm in a liftable manner.

[0015] Preferably, the test chamber is also provided with a test cable, which passes through the test chamber from the rear wall of the test chamber and is close to the test piece fixing frame.

[0016] Preferably, the test cabin is provided with a front cabin cover, and a transparent observation window is provided in the middle of the front cabin cover.

[0017] Preferably, the evaporation heat exchange tube extends in a spiral shape, and its cross section is shuttle-shaped.

[0018] Preferably, the box body is further separated into an equipment cabin, in which a compressor, a liquid storage tank, a throttling expansion valve and a condenser are arranged.

[0019] The beneficial effects of the utility model include: the test cabin has an annular bulkhead, and air supply ports and return air ports are provided on the annular bulkhead to form a vortex circulating wind centered on the test sample in the cabin, thereby quickly balancing the temperature and humidity in the space and effectively reducing wind noise; the test cabin provides power for circulating air through a cross-flow fan, which is not only conducive to the formation of vortex circulating wind, but also shortens the length of the air duct; the test cabin relays the vortex circulating wind blown out by the main cross-flow fan through a secondary cross-flow fan, so that the cross-flow fan can maintain the airflow vortex circulation at a low speed, saving electric energy and further reducing wind noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is described in detail below with reference to the embodiments and drawings, wherein:

[0021] Figure 1 It is a three-dimensional schematic diagram of the vortex circulation constant temperature and humidity test box of the utility model.

[0022] Figure 2It is a front view of a vortex circulation constant temperature and humidity test box of the utility model.

[0023] Figure 3 It is a right side view of the vortex circulation constant temperature and humidity test box of the utility model.

[0024] Figure 4 It is a cross-sectional view of the vortex circulation constant temperature and humidity test box of the utility model.

[0025] Figure 5 It is a structural diagram of the evaporating heat exchange tube.

[0026] Reference numerals:

[0027] 1-box, 2-test cabin, 21-annular bulkhead, 22-front cabin cover, 23-observation window, 3-water storage grid, 31-spray pipe, 41-main cross-flow fan, 42-secondary cross-flow fan, 43-air supply port, 44-return air port, 45-evaporation heat exchange tube, 46-heating net, 47-guide plate, 5-test piece fixing frame, 51-rear support arm, 52-front shelf, 6-test cable, 7-equipment cabin, 71-compressor, 72-liquid storage tank, 73-throttling expansion valve, 74-condenser, 100-test sample. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the utility model, rather than implying that each embodiment of the utility model must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0030] The principle of the present utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0031] Reference Figure 1-5The utility model proposes a vortex circulation constant temperature and humidity test box, comprising a box body 1, wherein a test chamber 2 and a water storage grid 3 are separated in the box body 1, the test chamber 2 is in a sealed cylindrical shape, a cross-flow fan is arranged at the periphery of the test chamber 2, and an air supply port 43 and an air return port 44 of the cross-flow fan are arranged on the annular bulkhead 21 of the test chamber 2, so that the air flow vortexes and circulates in the test chamber 2; an evaporative heat exchange pipe 45 and a heating net 46 are arranged in the air duct of the cross-flow fan, and the evaporative heat exchange pipe 45 is connected to the air conditioning system through a pipeline; the water storage grid 3 is connected to a spray pipe 31 extending into the test chamber 2. Among them, the evaporative heat exchange pipe 45 is used to reduce the temperature, the heating net 46 is used to increase the temperature, and the spray pipe 31 is used to increase the humidity.

[0032] The test chamber 2 of this embodiment has an annular bulkhead 21, and an air supply port 43 and an air return port 44 are provided on the annular bulkhead 21 to form a vortex circulation wind centered on the test sample 100 in the chamber, and the vortex airflow circulates around the test sample 100 without dead angles, and the test sample 100 has relatively little obstruction to the airflow, thereby quickly balancing the temperature and humidity in the space, and effectively reducing wind noise. A guide plate 47 coaxially bent with the annular bulkhead 21 is provided on the periphery of the air supply port 43 to guide the airflow to surround the annular bulkhead 21 to form a vortex.

[0033] The cross-flow fan drives the airflow through the drum, while the axial-flow fan drives the airflow through the rotation of the fan blades. In comparison, the air outlet of the axial-flow fan rotates forward, which is easy to form turbulence in the limited space of the test cabin 2, while the wind curtain blown out by the cross-flow fan is more conducive to the formation of vortex circulating wind, and the cross-flow fan can be close to the annular cabin wall 21. Compared with the background technology of constructing an air duct outside the test cabin 2 to install the fan, it can effectively shorten the length of the air duct and save space.

[0034] In this embodiment, the test cabin 2 is provided with a main cross-flow fan 41 and a secondary cross-flow fan 42, and the main cross-flow fan 41 and the secondary cross-flow fan 42 are symmetrically arranged on the left and right sides of the annular bulkhead 21. A plurality of secondary cross-flow fans 42 may also be provided, and all of the cross-flow fans are evenly arranged on the periphery of the annular bulkhead 21. Among them, the power of the main cross-flow fan 41 is greater than that of the secondary cross-flow fan 42. The main cross-flow fan 41 provides the most important heating and cooling functions for the test cabin 2, and the evaporative heat exchange tube 45 and the heating net 46 are arranged in the air duct of the main cross-flow fan 41. The secondary cross-flow fan 42 plays a role in assisting the vortex airflow circulation, and relays the vortex circulation wind blown out by the main cross-flow fan 41, so that the cross-flow fan can maintain the airflow vortex circulation at a low speed, save electric energy and further reduce wind noise.

[0035] In this embodiment, the front end of the spray tube 31 extends into the return air port 44 of the secondary cross-flow fan 42, and the mist droplets will be completely broken up by the drum of the secondary cross-flow fan 42 and then blown into the test chamber 2, which is conducive to uniform diffusion.

[0036] In this embodiment, the air supply ports 43 and the air return ports 44 of all the cross-flow fans are alternately arranged along the annular bulkhead 21, which further improves the circulation effect of the vortex airflow.

[0037] In this embodiment, a test piece fixing frame 5 is provided in the test chamber 2, and the test piece fixing frame 5 includes a rear support arm 51 and a front rack 52. The rear support arm 51 extends horizontally and is fixedly connected to the rear wall of the test chamber 2, and the front rack 52 is L-shaped and can be lifted and lowered at the front end of the rear support arm 51. The test sample 100 is placed or tied at the flat bottom position of the L-shape. According to the size and shape of the test sample 100, the test sample 100 is placed as close to the center of the test chamber 2 as possible by lifting the front rack 52. The test chamber 2 is provided with a front cover 22, and a transparent observation window 23 is provided in the middle of the front cover 22, which is convenient for observing the test sample 100 from the outside and is also conducive to the airflow circulation in the test chamber 2.

[0038] In this embodiment, the test chamber 2 is further provided with a test cable 6, which penetrates into the test chamber 2 from the rear wall of the test chamber 2 and is close to the test piece fixing frame 5. The test cable 6 is used to connect the test sample 100 with an external testing instrument, and the test cable 6 is close to the test piece fixing frame 5 for convenient wiring.

[0039] The space of the vortex circulation constant temperature and humidity test chamber is limited, and it is not suitable for installing a plate heat exchanger like an air conditioner. Moreover, the constant temperature and humidity equipment pays more attention to the rapid stabilization of the temperature through fine-tuning within a small range near a target value, and does not require rapid temperature adjustment like ordinary air conditioners. Therefore, in this embodiment, the evaporative heat exchange tube 45 is designed to be spiral. Although its heat exchange effect is not as good as that of a plate heat exchanger with large-area heat dissipation fins, it is small in size and easier to achieve the purpose of accurately adjusting the temperature in the test chamber 2 by controlling the refrigerant flow rate. The cross-section of the evaporative heat exchange tube 45 is shuttle-shaped. As can be seen from the attached figure, the acute angle of one end of the shuttle is facing the airflow direction, which plays a role similar to that of a fin in increasing the heat exchange area.

[0040] In this embodiment, the box 1 is further separated into an equipment cabin 7, in which a compressor 71, a liquid storage tank 72, a throttling expansion valve 73 and a condenser 74 are arranged, which are connected with the evaporative heat exchange pipe 45 through a pipeline to form a refrigeration system, so that this embodiment can operate independently. Of course, multiple test cabins 2 can also be assembled in one cabinet as needed, and a set of refrigeration system can be used to cool the evaporative heat exchange pipes 45 of multiple test cabins 2.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vortex circulation constant temperature and humidity test box, comprising a box body, wherein the box body is separated into a test chamber and a water storage grid, characterized in that: The test chamber is in the shape of a sealed cylinder, a cross-flow fan is arranged on the periphery of the test chamber, and an air supply port and an air return port of the cross-flow fan are arranged on the annular bulkhead of the test chamber, so that the air flow swirls and circulates in the test chamber; An evaporative heat exchange pipe and a heating network are arranged in the air duct of the cross-flow fan, and the evaporative heat exchange pipe is connected to the air conditioning system through a pipeline; The water storage grid is connected to a spray pipe extending into the test chamber.

2. The vortex circulation constant temperature and humidity test chamber according to claim 1, characterized in that: A guide plate coaxially bent with the annular bulkhead is provided on the periphery of the air supply port.

3. The vortex circulation constant temperature and humidity test chamber according to claim 2, characterized in that: The test cabin is provided with one main cross-flow fan and at least one secondary cross-flow fan. The main cross-flow fan and the secondary cross-flow fan are evenly arranged on the periphery of the annular cabin wall. The power of the main cross-flow fan is greater than that of the secondary cross-flow fan. The evaporative heat exchange tube and the heating network are arranged in the air duct of the main cross-flow fan.

4. The vortex circulation constant temperature and humidity test chamber according to claim 3, characterized in that: The front end of the spray pipe extends into the return air port of a secondary cross-flow fan.

5. The vortex circulation constant temperature and humidity test chamber according to claim 4, characterized in that: The air supply ports and return air ports of all cross-flow fans are arranged alternately along the annular bulkhead.

6. The vortex circulation constant temperature and humidity test chamber according to claim 1, characterized in that: A test piece fixing frame is provided in the test chamber, and the test piece fixing frame includes a rear support arm and a front storage rack; The rear support arm extends horizontally and is fixedly connected to the rear bulkhead of the test cabin; The front storage rack is L-shaped and is installed at the front end of the rear support arm in a liftable manner.

7. The vortex circulation constant temperature and humidity test chamber according to claim 6, characterized in that: The test chamber is also provided with a test cable, and the test cable penetrates into the test chamber from the rear wall of the test chamber and is close to the test piece fixing frame.

8. The vortex circulation constant temperature and humidity test chamber according to claim 1, characterized in that: The test cabin is provided with a front cabin cover, and a transparent observation window is provided in the middle of the front cabin cover.

9. The vortex circulation constant temperature and humidity test chamber according to claim 1, characterized in that: The evaporation heat exchange tube extends in a spiral shape, and its cross section is in a shuttle shape.

10. The vortex circulation constant temperature and humidity test chamber according to claim 1, characterized in that: The box body is also separated into an equipment cabin, in which a compressor, a liquid storage tank, a throttling expansion valve and a condenser are arranged.

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