A constant temperature cellar for keeping fruits and vegetables fresh

Abstract

A constant-temperature cellar used for preserving fruits and vegetables comprises a cellar body. The cellar body comprises a baseboard, an enclosure and an upper cover, the enclosure is provided with a door, the baseboard comprises a floor layer and a plastic cloth layer, the enclosure and the upper cover are combined by a foundation layer, an ash layer, a brick wall layer, a polystyrene board layer, a plywood layer, the plastic cloth layer, a sand layer and a soil layer. The floor layer and the foundation layer are one of a cement concrete layer, a stone-built layer and a brick-built layer. The partition wall in the cellar is provided with an inner door, air sterilizers are mounted in a heat insulation room and a storeroom of two sides of the partition wall, a natural ventilator in the storeroom is provided with an air inlet pipe and an air outlet pipe which are provided with airflow adjusting valves at two ends, the outlet of the air inlet pipe is arranged on the lower portion of the storeroom, the inlet of the air inlet pipe is provided with an air inlet cap, the inlet of the air outlet pipe is arranged at the top of the storeroom, and the outlet of the air outlet pipe is provided with a vent cap. The storeroom is provided with a compartment communicated with the natural ventilator, and a water pipe with a water pump is mounted in the storeroom and communicated with an underground water source. By the constant-temperature cellar, preservation quality of the fruits and the vegetables can be improved, and preservation period of the fruits and the vegetables is prolonged.

Description

technical field [0001] The present invention provides a constant temperature cellar for fruit and vegetable preservation. Background technique [0002] Fruits and vegetables have high water content and are rich in nutrients, which are the main components of human dietary nutrition, but they are prone to dehydration and wilting, dull discoloration, rot and deterioration after harvesting. The temperature requirements of fruit and vegetables for refrigeration are not consistent. The direct transfer of fruit and vegetables from natural temperature to the refrigerator will directly affect the physiological activities of the fruit and vegetable itself, causing the skin of the fruit and vegetable to change color and taste worse. Taking watermelon as an example, it is well known that due to the storage of watermelon The time is short, so the watermelons sold in the north in winter are basically grown in the southern greenhouses, and the greenhouse watermelons have insufficient sunsh...

AI Technical Summary

Problems solved by technology

[0002] Fruits and vegetables have high water content and rich nutrition, which are the main components of human dietary nutrition. However, after harvesting, they are prone to dehydration, wilting, dull discoloration, and rotten deterioration. Growing fruits and vegetables has different temperature requirements for refrigeration. Moving fruits and vegetables directly from natural temperature to cold storage will directly affect the physiological activities of fruits and vegetables, causing the skin of fruits and vegetables to change color and taste worse. Taking watermelon as an example, as we all know, due to the storage of watermelon The time is short, so the watermelons sold in the north in winter are basically grown in greenhouses in the south, and the watermelons in the greenhouses do not have enough sunshine time, so the nutrition and taste are difficult to compare with the natural ripe watermelons of the season, and the watermelons in the south are transported from the place of origin. To the north, transportation and storage costs are naturally added to the sales cost of watermelons, resulting in high prices and poor taste of watermelons in winter, so many fruit merchants hope to store watermelons in season until winter sales, but for such high-quality watermelons and cabbage The storage of cheap vegetables and fruits requires not only a large storage space but also low storage costs, and even no operating costs, otherwise it will lead to an increase in the price of stored fruits and vegetables, a decrease in market profits, and a weakening of competitiveness. Store watermelon in a constant temperature cold storage, the high storage cost will eventually be added to the selling price of the watermelon, not only cannot guarantee the economical rise of the watermelon, but also lead to a decline in the profit of the fruit and vegetable, making its market competitiveness weaker, Even its exorbitant storage cost will also lead to losses for the fruit merchants; the other is to store it in a normal room, but the shelf life of the fruit and vegetable is short and cannot be stored for a long time, and in order to improve the shelf life of the fruit and vegetable, most of the fruit and vegetable surfaces stored indoors are sprayed with wax. Many consumers are quite repulsed by this kind of fruit and vegetable, and feel that it is unhealthy to eat; there is another kind of storage in the fruit and vegetable cellar. The fruit and vegetable cellar is usually built by digging holes in the mountains or digging holes underground and covering them with soil. The construction cost is relatively high, but the cellar The temperature inside the cellar is low and relatively constant, which is beneficial to the preservation of fruits and vegetables. Due to the limitation of the construction method and the structure of the cellar, the inner wall of most fruit and vegetable cellars is relatively humid, and when fruits and vegetables are harvested, they carry a certain amount of Microorganisms and pests, these microorganisms and pests are easy to reproduce in a humid environment, causing the fruits and vegetables in the cellar to rot and deteriorate, so the shelf life of fruits and vegetables is usually within one month, and the gas and heat generated by newly stored vegetables and fruits need to be timely Discharge from the cellar to prevent the corruption of vegetables and fruits. If the cellar door is opened for ventilation, there will be a temperature difference in the cellar, which will frostbite the vegetables and fruits near the cellar door. Due to the long winter in Northeast China, the preservation period of only one month for fruits and vegetables is still not enough. In order to meet the market demand for summer storage and winter sales, many fruit and vegetable storage companies control the environment in the cellar through various methods such as irradiation antibacterial and controlled atmosphere preservation to inhibit the physiological activities of fruits and vegetables. The storage environment conditions and other requirements are relatively strict. Simply using machinery and equipment to control the environment in the cellar cannot meet the needs of fruits and vegetables from the natural environment, resulting in poor color and taste of fruits and vegetables, low consumer satisfaction, and the air in the cellar is kept in the machinery for a long time. cycle, the number of bacteria that grow will continue to increase, aggravating the spoilage of fruits and vegetables, which is one of the reasons why the fruit and vegetable cellars in the prior art cannot further improve the storage time of fruits and vegetables

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