CN206064437U - A kind of humidity control device in climate compartment - Google Patents

Abstract

The utility model discloses a humidity control device used in a climate chamber, which comprises a box body with an air inlet at the bottom and an air outlet at the top. In the box body, the bottom is divided into a water bath area, and the upper part is divided into a secondary humidification area; the water bath area is equipped with a water circulation system, a water temperature control system and a Pall ring accumulation area. The water circulation system leads to the secondary humidification area. A porous ceramic tube is provided to generate a large number of air bubbles to promote full contact between gas and water. The utility model adjusts the humidity by controlling the temperature of the saturated water-containing gas. Compact structure, simple control, high humidification efficiency and stable operation. Make the gas passing into the climate chamber meet the detection requirements, and ensure the authenticity and reliability of the detection data.

Description

A humidity control device used in a climate chamber

technical field

The utility model relates to the technical field of quality analysis and detection, in particular to a humidity control device used in a climate chamber for quality detection of furniture and wood-based panels.

Background technique

With the development of the national economy and the improvement of people's living standards, people begin to pay attention to the safety of the home environment. At present, the wood-based panels used in indoor furniture and decoration are added with formaldehyde as the main raw material in the processing process to varying degrees. The furniture made of this material will continue to release free formaldehyde and volatile organic compounds TVOC to the outside world. Such gases are harmful to a certain degree, which will inevitably bring a certain degree of pollution to the indoor air environment, and have a non-negligible impact on people's health.

The climate chamber method is currently the most authoritative test method for the determination of formaldehyde and TVOC in furniture and wood-based panels. During the testing process, the temperature and humidity conditions in the cabin have a great influence on the testing results, so the humidity control device is an important part of the climate cabin.

The humidity control methods used in environmental test equipment in the market can be divided into dry and wet gas mixing method, direct humidification and dehumidification method, and dew point humidity control method. In terms of climate chamber applications, the dew point humidity control method has the characteristics of simple control, high humidification efficiency, and sustainable and stable supply of gas with a certain temperature and humidity. This design is based on the dew point humidity control method, using the dew point humidity control water tank to adjust the temperature and humidity of the incoming gas. The key to the method of dew point humidity control is to make the gas reach water saturation at a certain temperature. The existing equipment has certain problems in making the gas reach water saturation, and the device effectively solves this problem.

Contents of the invention

The purpose of the utility model is to output the external air which is passed into the dew point humidity control water tank into a water-saturated gas with a certain temperature. The device can humidify the gas entering the humidity-adjusting water tank to make the relative humidity reach 100%, and the internal temperature of the device can be adjusted. The structure is simple, the humidification effect is stable, and a large amount of water-saturated gas at a certain temperature can be continuously provided. Thereby ensuring the relative humidity of the gas in the climate chamber.

The technical solution provided to realize the utility model is: a humidity control device used in a climate chamber, including a thermal insulation box, which is characterized in that: there is a gas inlet at the bottom of the box, and a gas outlet at the top, wherein the bottom of the box is The water bath area, the upper part is the secondary humidification area; the water bath area is equipped with a water temperature control system, a water circulation system and a Pall ring accumulation area, the water circulation system leads to the top secondary humidification area, and the water circulation system inlet links the water bath area, The water outlet of the water circulation system is linked to the sprinkler head installed on the top of the secondary humidification area to provide water for the secondary humidification, and the water droplets generated by the sprinkler head pass through the filler ceramic balls and fall back into the water bath area.

The Pall ring accumulation area in the water bath area is located under the secondary humidification area and the Pall ring is isolated from it with an isolation plate. A large number of Pall rings are distributed in the Pall ring accumulation area, and in the Pall ring accumulation area The gas inlet at the bottom is provided with a porous ceramic tube connected to the gas inlet, so that the incoming gas enters the water bath in the form of a large number of bubbles.

The water temperature control system includes a refrigeration system and a heating system, and its structure is an electric heating tube and a coil evaporator. It is composed of an electric heating tube, a coil evaporator, a compressor, an expansion valve and a condenser; the condenser, expansion valve, coil evaporator and compressor are connected in sequence to form a refrigeration closed circuit; the outlet of the dew point humidity control water tank The air port is connected to the climate chamber body.

The water circulation system includes a water inlet pipe, a water circulation pump and a water circulation pipe. The water inlet pipe is arranged in the water bath area, and is connected to the circulating water pipe through the circulating water pump. The circulating water pipe is connected with the top shower head, and the water droplets generated by the shower head go down through the filler ceramic balls and fall back into the water bath area.

On the whole, the lower area is mainly the water storage area, which is equipped with air inlet, porous ceramic tube, water discharge port, cooling evaporation coil, electric heating tube and temperature sensor; the middle area is the water level monitoring area, with a liquid level gauge, The water level is monitored by the principle of a connector; the upper area is a secondary humidification area, and a large amount of filler is placed to increase the contact area between air and water, and an air outlet, water injection port and shower are also installed.

The water bath area and the secondary humidification area are separated by a ventilation partition.

In the water bath area, the Pall ring accumulation area is separated from the water temperature control system and the water circulation system by a grid partition, the gap width of the grid partition is smaller than the Pall ring, and a large number of Pall rings are distributed in the Pall ring accumulation area.

The temperature sensor should be installed in the water bath area of the dew point humidity control water tank, and the filling should be ceramic balls; the opening ratio of the support plate of the packing layer and the ventilation isolation plate are both 65%.

Compared with the traditional climate chamber humidity control device, the utility model has the following advantages:

(1) Through the water temperature control system, a constant temperature water bath environment can be created to provide a preset temperature for the saturated humidity gas.

(2) Set a Pall ring accumulation area at a certain height to delay the rising speed of the bubbles, so that the bubbles can fully contact with the water, and the temperature of the gas in the bubbles is gradually the same as the water temperature.

(3) When the bubbles rise and break and leave the water body and enter the secondary humidification zone, the gas will fully contact with the water in the packing layer while continuing to rise. Ceramic balls are installed inside the packing layer to further make the humidity of the gas completely saturated at the water temperature humidity.

Description of drawings

Figure 1 is a schematic diagram of a humidity control device used in a climate chamber.

In the figure 1. Air inlet; 2. Porous ceramic tube; 3. Water outlet; 4. Coil evaporator; 5. Compressor; 6. Condenser; 7. Expansion valve; 8. Electric heating tube; 9. Grid 10. Inlet pipe; 11. Circulating water pump; 12. Circulating water pipe; 13. Air outlet; 14. Water injection port; 15. Spray head; 16. Ceramic ball; 17. Support plate; 18. Isolation plate; 19. Liquid level gauge; 20. Pall ring; 21. Box body.

detailed description

Referring to accompanying drawing 1, the utility model includes: the top of the box body 21 is provided with an air outlet 13, a water injection port 14, a spray head 15, a circulating water pipe 12 is connected with the spray head 15, and a circulating water pump 11 is connected inside, and an air inlet is provided at the bottom Port 1, water discharge port 3, the air inlet is connected to porous ceramic pipes, a packing layer is set in the secondary humidification area, the packing layer is provided with ceramic balls 16, and a support plate 17 is provided at the bottom. The opening rate of the support plate is 65%. The aperture is 3 mm; the lower part is the water bath area, and the isolation plate 18 is arranged between the secondary humidification area and the water bath area, the aperture is 3 mm, and the opening ratio is 65%. The water bath area is further divided into a Pall ring accumulation area and a water temperature adjustment area. The upper part of the water bath area is provided with a liquid level gauge 19, and the water temperature adjustment area is provided with an electric heating tube 8 connected to an external heating control circuit, a coil evaporator 4, and a coil evaporator. 4 and the external expansion valve 7, the condenser 6, and the compressor 5 form a closed circuit to realize the temperature regulation function.

The utility model controls the temperature of the water to make the gas pass through the water area at a certain temperature to reach water saturation at a certain temperature, and then uses the saturated water-containing gas to adjust the humidity. The specific implementation method of the utility model: the gas is introduced from the bottom air inlet 1 of the dew point humidity control water tank body 21, and passes through the porous ceramic tube 2, causing a large number of air bubbles to flow into the water area, and the Pall ring 20 swims in the water area, It is used to slow down the speed of the bubbles flowing from the bottom up while making the gas contact with water as much as possible to produce saturated humidity gas. This process is the initial humidification of the gas in the dew point humidity control water tank. The water and gas reach the required temperature under the action of the heating circuit composed of the electric heating tube 8 and the heating control circuit and the condensation circuit composed of the coil evaporator 4 , compressor 5 , expansion valve 7 and condenser 6 . The temperature adjustment area and the Pall ring gathering area are separated by grid-shaped partitions 9 , and the gap width of the grid-shaped partitions is smaller than that of the Pall rings 20 to prevent the Pall rings from contacting the heating and cooling devices. The gas enters the secondary humidification area after the initial humidification in the water bath area. The spray head 15 is installed on the top of the secondary humidification area. The spray head is connected to the circulating water pipe 12, and the circulating pump 11 is turned on. The shower head 15 on the top sprays water evenly onto the ceramic ball 16, and the gas with a certain humidity formed after the bubbles fully contact the water in the water bath area fully contacts the water sprayed by the shower head 15 at the ceramic ball 16 to Humidify again to ensure the gas reaches water saturation. Finally, the humidified saturated gas at a certain temperature is discharged from the gas outlet 13 into the climate chamber body.

Claims (5)

1. A humidity control device used in a climate chamber, comprising an air inlet, a porous ceramic tube, a water discharge port, a coil evaporator, a compressor, a condenser, an expansion valve, an electric heating tube, a grille partition, an inlet Water pipes, circulating water pumps, circulating water pipes, air outlets, water injection ports, shower heads, ceramic balls, support plates, isolation plates, liquid level gauges, Pall rings, box bodies, characterized in that in the box body, the bottom is set as a water bath The upper part is set as the secondary humidification area; the secondary humidification area is provided with a spray head and a packing layer, and the water bath area is equipped with a water temperature control system, a water circulation system and a Pall ring accumulation area, and the water circulation system is connected to To the secondary humidification area, the Pall ring accumulation area is located below the secondary humidification area, a large number of Pall rings are distributed in the Pall ring accumulation area, and a porous ceramic tube is arranged at the bottom of the Pall ring accumulation area. The air port is connected to the climate cabin body. 2. The humidity control device used in a climate chamber according to claim 1, wherein the water temperature control system comprises a refrigeration system and a heating system. 3. The humidity control device used in the climate chamber according to claim 1, characterized in that, the water bath area is provided with a temperature sensor, and the Pall ring accumulation area is provided with a Pall ring. 4. The humidity control device used in a climate chamber according to claim 1, wherein the porous ceramic tube is connected to the air inlet. 5. The humidity control device used in the climate chamber according to claim 1, characterized in that, the opening ratio of the isolation plate is 65%.