Novel wind-curtain device for refrigerator

Abstract

The invention relates to a novel wind-curtain device for a refrigerator. The device comprises a fan set, a fireproof valve, a wind-supplying pipe, a wind-returning pipe, a bend, a three-way pipe, an increasing pipe, a PVC (Poly Vinyl Chloride) curtain, a wind-supplying opening grid, a wind-returning opening grid and a curtain wall. The PVC curtain and an air curtain of the device can perform the double heat-insulating actions for the refrigerator, and meanwhile, a door curtain can be used for blocking the air curtain from being directly contacted with an external environment, thereby the probability of garbage entering a wind pipe is decreased. Mosquitoes, flies, insects and mice are effectively prevented from entering the refrigerator from the side of the air curtain with a smaller wind speed through uniform air flows formed at a refrigerator door by a wind-supplying and returning system, thereby the storage safety of the refrigerator is improved, and the uniform wind speed is favorable to blocking the penetration of cold wind. The device can be used for sufficiently blocking the penetration of the cold wind in the refrigerator, and insect prevention and dust prevention are achieved. A wind curtain disclosed by the invention has the characteristics of energy saving, high efficiency, cleanliness, simple structure, low cost and the like and is particularly suitable for large refrigerators for storing foods.

Description

technical field [0001] The invention relates to an air curtain device for cold storage. In particular, it relates to an air curtain device which can effectively prevent animals such as insects and rodents from entering the cold storage and can effectively insulate heat. Background technique [0002] With the continuous expansion of the capacity and quantity of cold storage at home and abroad, in recent years, more and more cold storage uses cold air curtains. Since the area with the most frequent heat exchange in the cold storage is at the cold storage door, the cold air curtain is an effective heat insulation measure for general large and medium-sized cold storage. Traditional cold air curtains are usually air supply in the form of an air curtain machine installed on the top, and there is no return air system. Due to the relatively low wind speed near the ground and the shortcomings of too wide wind surface, this type of air curtain is likely to cause harmful effects such ...

AI Technical Summary

Problems solved by technology

Traditional cold air curtains are usually air supply in the form of an air curtain machine installed on the top, and there is no return air system. Due to the relatively low wind speed near the ground and the shortcomings of too wide wind surface, this type of air curtain is likely to cause harmful effects such as mosquitoes and rodents. Insects entering the cold storage from near the ground will cause great harm to the cold storage of food refrigeration, and this form of air curtain is also easy to cause heat loads to enter the cold storage from near the ground, causing fluctuations in the temperature of the cold storage and affecting the quality of storage

[0003] At present, domestic research on air curtains in cold storage is not deep enough

Foreign A.M.Foster found that the most suitable cold air curtain wind speed for small and medium-sized cold storage is 18m / s, which can reduce the cold air penetration by 44% to 78%. Air curtain

And although the patent (200520035255.8) of Mei Xiujuan et al. has designed a kind of blowing and sucking integrated air curtain, the size between the air outlets is not defined, and the blowing speed of the air outlet is not clearly defined, and the air outlet of this type of air curtain Failure to adopt a gradual expansion form may easily cause the airflow to not be evenly distributed in the blowing area

[0004] At present, most of the air curtains used in domestic cold storage are not fully efficient, dust-proof, and insect-proof. Even some cold air curtains that meet these requirements often increase the air outlet in order to make the wind speed near the ground meet the requirements of insect prevention and heat insulation. The wind speed increases the operating power of the fan, resulting in a large waste of energy, and the excessive wind speed may cause the airflow to flow through the ground and change its direction into the cold storage, causing dust and insects outside the cold storage door to be drawn into the cold storage , so it is necessary to provide a new type of more efficient air curtain to improve the quality and safety of frozen storage in the cold storage

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