Water-cooled cold storage for silkworm eggs and method for reducing humidity in the cold storage at a stable temperature

Abstract

The present invention discloses a water-cooled cold storage for silkworm eggs, comprising: a refrigerated chamber; an evaporator disposed in the refrigerated chamber, the evaporator being inclined and having its liquid inlet higher than its liquid outlet; a refrigerant pool disposed outside the refrigerated chamber, the liquid outlet of the refrigerant pool being connected and communicated with the liquid inlet of the evaporator through a liquid inlet pipe, and the return port being connected and communicated with the liquid outlet of the evaporator through a return pipe, wherein a water pump and a flow regulating valve are sequentially provided on the liquid inlet pipe along the liquid flow direction; and a method for stably reducing the humidity of the cold storage at a certain temperature. The present invention has the advantages that the temperature in the refrigerated chamber can be controlled at about 3.5 °C with a fluctuation of less than plus or minus 0.5 °C, and the humidity can be controlled at about 75%, etc., which can meet the long-term refrigeration requirements of silkworm eggs.

Description

Technical Field

[0001] The present invention relates to the field of cold storages. More specifically, the present invention relates to a water-cooled silkworm egg cold storage and a method for reducing the humidity of the cold storage at a stable temperature. Background Art

[0002] The cold storage and protection of silkworm eggs is an important link in silkworm egg production, with very strict requirements for temperature and humidity. The cold storage temperature is required to be 3.5°C, with a fluctuation of less than ±0.5°C, and the humidity is required to be about 75%. Large fluctuations in the cold storage temperature affect the safety of silkworm egg cold storage, and too high or too low humidity affects the hatching quality of silkworm eggs.

[0003] Most of the existing cold storages are air-cooled, which have the advantages of low cost and easy maintenance. However, the temperature fluctuation of air-cooled cold storages is greater than ±1°C, and the humidity is less than 60%, which cannot meet the long-term cold storage requirements of silkworm eggs. For the existing water-cooled cold storages, as recorded in "The Application of a New Type of Combined Cold Storage in Silkworm Egg Cold Storage", although the temperature fluctuation can reach less than or equal to 1°C, its relative humidity is greater than 80%, and the fluctuation range is large, still unable to meet the existing long-term cold storage requirements of silkworm eggs. Summary of the Invention

[0004] One object of the present invention is to provide a water-cooled silkworm egg cold storage to meet the long-term cold storage requirements of silkworm eggs.

[0005] Another object of the present invention is to provide a method for reducing the humidity of the cold storage at a stable temperature to reduce the humidity of the water-cooled cold storage.

[0006] To achieve the objects and other advantages of the present invention, there is provided a water-cooled silkworm egg cold storage, including: a cold storage chamber; an evaporator disposed in the cold storage chamber, the evaporator being inclined, and its liquid inlet being higher than its liquid outlet; a refrigerant pool disposed outside the cold storage chamber, the liquid outlet of the refrigerant pool being connected and communicated with the liquid inlet of the evaporator through a liquid inlet pipe, and the return port being connected and communicated with the liquid outlet of the evaporator through a return pipe, wherein a water pump and a flow regulating valve are sequentially provided on the liquid inlet pipe along the liquid flow direction.

[0007] Preferably, in the water-cooled silkworm egg cold storage, the evaporator is a flat plate-shaped serpentine tube evaporator.

[0008] Preferably, in the water-cooled silkworm egg cold storage, the height difference between the liquid inlet and the liquid outlet of the evaporator is 6-10 cm.

[0009] Preferably, in the water-cooled silkworm egg cold storage, the height difference between the liquid inlet and the liquid outlet of the evaporator is 8 cm.

[0010] Preferably, in the water-cooled silkworm egg cold storage, the refrigerant is brine.

[0011] Preferably, for the water-cooled cold storage for silkworm eggs, the temperature of the brine is less than or equal to -7°C.

[0012] Preferably, the water-cooled cold storage for silkworm eggs further includes: a temperature and humidity sensor disposed in the cold storage room; a controller disposed outside the cold storage room, and the controller is respectively connected to the temperature and humidity sensor, the water pump, and the flow regulating valve.

[0013] The present invention also provides a method for reducing the humidity in a cold storage at a stable temperature, which is realized by using the above-mentioned water-cooled cold storage for silkworm eggs.

[0014] The present invention has at least the following beneficial effects:

[0015] By arranging the evaporator obliquely with the liquid inlet higher than the liquid outlet, the evaporator pipeline has a certain slope. When the temperature in the cold storage room reaches 3.5°C and the water pump stops working, the refrigerant can flow back to the refrigerant pool as soon as possible to reduce the temperature fluctuation in the cold storage room; by installing a flow regulating valve in front of the evaporator and adjusting the brine flow rate, the working time of the water pump is extended, while reducing the temperature fluctuation in the cold storage room, the moisture in the cold storage room can be frosted to a greater extent, reducing the humidity in the cold storage room; that is, through the synergistic effect of the evaporator and the flow regulating valve, the temperature in the cold storage room is controlled at about 3.5°C, the fluctuation is less than ±0.5°C, and the humidity is controlled at about 75% to meet the long-term cold storage requirements of silkworm eggs.

[0016] Other advantages, objectives, and features of the present invention will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the water-cooled cold storage for silkworm eggs according to an embodiment of the present invention;

[0018] Figure 2 is a top view structure diagram of the evaporator according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further describes the present invention in detail with reference to the embodiments and the drawings, so that those skilled in the art can implement it according to the description in the specification.

[0020] It should be understood that the terms such as "having", "comprising", and "including" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0021] It should be noted that, unless otherwise specified, the experimental methods described in the following implementation schemes are all conventional methods, and the reagents and materials, unless otherwise specified, can all be obtained from commercial channels; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention.

[0022] As Figure 1 , Figure 2 shown, the present invention provides a water-cooled cold storage for silkworm eggs, including: a refrigerated chamber 1; an evaporator 2, which is arranged in the refrigerated chamber 1, the evaporator 2 is inclined, and its liquid inlet is higher than its liquid outlet; a refrigerant pool 3, which is arranged outside the refrigerated chamber 1, the liquid outlet of the refrigerant pool 3 is connected and communicated with the liquid inlet of the evaporator 2 through a liquid inlet pipe 4, and the return port is connected and communicated with the liquid outlet of the evaporator 2 through a return pipe 5. Among them, a water pump 6 and a flow regulating valve 7 are successively arranged on the liquid inlet pipe 4 along the liquid flow direction.

[0023] In the above implementation manner, the water-cooled cold storage for silkworm eggs includes a refrigerated chamber, an evaporator, a refrigerant pool, a liquid inlet pipe, a return pipe, a water pump and a flow regulating valve. The side walls of the refrigerated chamber, the liquid inlet pipe and the return pipe are all coated with heat-insulating materials to reduce heat loss. The evaporator is arranged in the refrigerated chamber. Preferably, the evaporator is inclined and arranged at the top of the refrigerated chamber to increase the available space in the refrigerated chamber, and the liquid inlet of the evaporator is higher than the liquid outlet, so that the evaporator pipeline has a certain slope to facilitate the reflux of the refrigerant. The refrigerant pool is arranged outside the refrigerated chamber, and the refrigerant is contained in the refrigerant pool. The refrigerant can be one of brine, ethylene glycol aqueous solution or propylene glycol aqueous solution. The refrigerant pool is connected to an external refrigeration device to cool the refrigerant to a preset temperature. The liquid outlet of the refrigerant pool is connected and communicated with the liquid inlet of the evaporator through the liquid inlet pipe, and the return port is connected and communicated with the liquid outlet of the evaporator through the return pipe to form a refrigerant circulation loop. A water pump and a flow regulating valve are successively arranged on the liquid inlet pipe along the liquid flow direction to provide power for the circulation of the refrigerant and regulate the refrigerant flow.

[0024] During use, first cool the refrigerant in the refrigerant pool and keep it at the preset temperature, then start the water pump and adjust the refrigerant flow rate entering the evaporator through the flow regulating valve, so that the refrigerant circulates between the evaporator and the refrigerant pool to take away the heat in the refrigerated chamber and control the temperature and humidity in the refrigerated chamber within the required range. When the temperature and humidity in the refrigerated chamber reach the preset requirements, turn off the water pump, and the refrigerant in the evaporator can quickly flow back to the refrigerant pool by itself.

[0025] By arranging the evaporator in an inclined manner with the liquid inlet higher than the liquid outlet, a certain slope is formed in the evaporator pipeline. When the temperature in the refrigerating chamber reaches 3.5°C and the water pump stops working, the refrigerant can flow back to the refrigerant pool as soon as possible to reduce the temperature fluctuation in the refrigerating chamber. By installing a flow regulating valve in front of the evaporator and adjusting the brine flow rate, the working time of the water pump is extended, and while reducing the temperature fluctuation in the refrigerating chamber, the moisture in the refrigerating chamber can be frosted to a greater extent, reducing the humidity in the refrigerating chamber. That is, through the synergistic effect of the evaporator and the flow regulating valve, the temperature in the refrigerating chamber is controlled at about 3.5°C with a fluctuation of less than ±0.5°C, and the humidity is controlled at about 75%. Of course, the cold storage of the present invention can also adjust the refrigerant temperature and refrigerant flow rate according to needs to change the temperature and humidity in the refrigerating chamber to meet other usage requirements.

[0026] In another embodiment, the evaporator 2 is a flat serpentine tube evaporator to minimize the residence time of the refrigerant in the evaporator pipeline after the water pump is turned off and reduce the temperature fluctuation in the refrigerating chamber.

[0027] In another embodiment, the height difference between the liquid inlet and the liquid outlet of the evaporator 2 is 6 - 10 cm. Further, the height difference between the liquid inlet and the liquid outlet of the evaporator 2 is 8 cm to form a certain slope in the evaporator pipeline while minimizing the occupation of the top space of the refrigerating chamber by the evaporator.

[0028] In another embodiment, the refrigerant is brine. Further, the temperature of the brine is less than or equal to -7°C.

[0029] In another embodiment, the water-cooled silkworm egg cold storage further includes: a temperature and humidity sensor 8 disposed in the refrigerating chamber 1; a controller 9 disposed outside the refrigerating chamber 1, and the controller 9 is respectively connected to the temperature and humidity sensor 8, the water pump 6, and the flow regulating valve 7. An automatic control program is pre-stored in the controller to automatically control the opening and closing of the water pump and adjust the flow rate of the flow regulating valve according to the detection information received by the temperature and humidity sensor, realizing the automatic control of the temperature and humidity of the cold storage.

[0030] The present invention also provides a method for reducing the humidity of a cold storage at a stable temperature, which is realized by using the above-mentioned water-cooled silkworm egg cold storage.

[0031] Specifically, in the present invention, a flow regulating valve is installed on the liquid inlet pipe before the evaporator. During the refrigerant circulation process, the flow rate of the brine (less than or equal to -7°C) entering the evaporator is regulated by the flow regulating valve, reducing the heat absorption of the evaporator per unit time. Furthermore, the working time of the water pump when the refrigerated chamber reaches 3.5°C is extended, so that the moisture in the refrigerated chamber freezes to a greater extent, achieving the purpose of reducing the humidity in the refrigerated chamber. Extending the working time of the water pump can also reduce the temperature fluctuation in the refrigerated chamber. Further, by arranging the evaporator obliquely with the liquid inlet higher than the liquid outlet, the evaporator pipeline of the present invention has a certain slope. When the temperature in the refrigerated chamber reaches 3.5°C and the water pump stops working, the brine can flow back to the refrigerant pool as soon as possible, further reducing the temperature fluctuation in the refrigerated chamber and controlling the temperature fluctuation in the refrigerated chamber within a range of less than ±0.5°C.

[0032] In practical applications, through the above method, combined with the requirements for silkworm egg refrigeration and the service life of machine maintenance, the current temperature fluctuation in the refrigerated chamber can reach ±0.15 degrees, and the humidity is between 75% - 80%. Of course, according to needs, the temperature and humidity in the refrigerated chamber can be changed by adjusting the brine temperature and brine flow rate to meet other usage requirements. In theory, as long as the brine flow rate and brine temperature are adjusted so that the cold air input into the refrigerated chamber is equal to the heat generated by the refrigerated objects in the refrigerated chamber, the temperature fluctuation in the refrigerated chamber can reach ±0 degrees, and at the same time, the humidity can be continuously reduced. However, if this is done, the water pump will run non-stop for 24 hours, which is very damaging to the machine.

[0033] The equipment quantity and processing scale described here are used to simplify the description of the present invention. The application, modification, and variation of the water-cooled silkworm egg cold storage and the method for reducing the humidity of the water-cooled cold storage of the present invention are obvious to those skilled in the art.

[0034] Although the embodiments of the present invention have been disclosed as above, it is not limited to only the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to specific details and the illustrated and described examples here.

Claims

1. Water-cooled cold storage for silkworm eggs, characterized in that, Comprising: A refrigerating chamber; A flat plate-shaped serpentine tube evaporator, which is arranged in the refrigerating chamber, the evaporator is inclined, and the height difference between the liquid inlet and the liquid outlet is 8 cm; A refrigerant pool, which is arranged outside the refrigerating chamber, the liquid outlet of the refrigerant pool is connected and communicated with the liquid inlet of the evaporator through a liquid inlet pipe, and the reflux port is connected and communicated with the liquid outlet of the evaporator through a reflux pipe. Wherein, a water pump and a flow regulating valve are sequentially arranged on the liquid inlet pipe along the liquid flow direction; the refrigerant is brine, and its temperature is less than or equal to -7°C; A temperature and humidity sensor, which is arranged in the refrigerating chamber; A controller, which is arranged outside the refrigerating chamber, the controller is respectively connected with the temperature and humidity sensor, the water pump and the flow regulating valve, and is used to adjust the opening of the flow valve and the start and stop of the water pump according to the temperature and humidity data, so as to extend the working time of the water pump and promote frosting in the refrigerating chamber, thereby controlling the temperature at 3.5°C ± 0.5°C and the humidity at 75%.

2. Method for reducing humidity in a cold storage at a stable temperature, characterized in that, It is realized by using the water-cooled silkworm egg cold storage as described in claim 1.

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