CN210432756U - High-efficient type fruit vegetables freeze dryer - Google Patents

Abstract

The utility model belongs to freeze dryer equipment field specifically is a high-efficient type fruit vegetables freeze dryer, including drying cabinet, the shelf of setting in the drying cabinet and the cold trap of setting in the drying cabinet, be provided with the regulating layer between shelf and the cold trap, the regulating layer separates into two spaces with the drying cabinet, the regulating layer comprises the heating network that two intervals set up at least, the heating network is the network structure who is made by heat conduction tubular product, and the tubular product of whole heating network communicates with each other, and the heating network has an export of ventilating and an entry of ventilating at least, the entry of ventilating passes through the valve and connects the air supply, and the export of ventilating communicates outside the drying cabinet, the heating network still is connected with temperature sensor. Due to the design, the cold trap can be designed to be closer to the shelf, water vapor can reach the cold trap more quickly, and the space is more compact, so that higher water catching efficiency can be achieved. Meanwhile, the heating net is of a net structure, and water vapor in the drying box can rapidly pass through the heating net, so that the water catching efficiency is improved.

Description

High-efficient type fruit vegetables freeze dryer

Technical Field

The utility model belongs to the fruit vegetables equipment field that keeps fresh, concretely relates to high-efficient type fruit vegetables freeze dryer.

Background

The freeze dryer utilizes the tri-state change of water, and utilizes the sublimation principle to ensure that the moisture in the pre-frozen material is directly sublimated into water vapor in the ice state without melting the ice under the high vacuum state, thereby achieving the aim of freeze drying. The freeze-drying device mainly comprises a drying box, a cold trap, a circulating system, a vacuum system, a control system and a heating/cooling system, wherein the drying box is a product freeze-drying treatment place, the cold trap has the function of adsorbing water vapor in the drying box, and the adsorption efficiency of the cold trap directly influences the freeze-drying efficiency of the freeze-drying machine.

The existing cold trap is installed in two ways, one is installed in the drying box in a built-in mode, the other is installed outside the drying box in an external mode, and the built-in mode has the advantages of compact structure, small resistance to water vapor flow and capability of efficiently catching water. However, the temperature difference is large due to the fact that the temperature difference is close to the shelf in the drying box, the surface temperature of the shelf is prone to be uneven, and the quality of freeze-dried products is affected, so that the built-in cold trap cannot be too close to the shelf, and an interlayer with a ventilation window (the ventilation window cannot be too large) needs to be arranged between the cold trap and the shelf to reduce the influence on the surface temperature of the shelf, and therefore the water capture efficiency of the freeze-dried products is still limited.

SUMMERY OF THE UTILITY MODEL

In order to overcome above-mentioned built-in cold-trap can not be too near from the shelf, need set up the interlayer that has the window of ventilating moreover between cold-trap and shelf, cause the defect of the not high technical problem of water capture efficiency, the utility model provides a high-efficient type fruit vegetables freeze dryer.

The technical scheme is as follows:

a high-efficiency fruit and vegetable freeze dryer comprises a drying box, a shelf arranged in the drying box and a cold trap arranged in the drying box, wherein an adjusting layer is arranged between the shelf and the cold trap, the drying box is divided into two spaces by the adjusting layer, the adjusting layer at least comprises two heating nets arranged at intervals, the heating nets are of a net structure made of heat conduction pipes, the pipes of the whole heating net are communicated, each heating net at least comprises a ventilation outlet and a ventilation inlet, the ventilation inlets are connected with an air source through valves, the ventilation outlets are communicated with the outside of the drying box through another valve, and the heating nets are further connected with temperature sensors.

This kind of design, when the freeze dryer carries out the sublimation freeze-drying, through air supply heating net, through adjusting the air input with the temperature regulation of heating net to being close shelf surface temperature to this forms a regulation band. The heating net can effectively form a temperature isolation zone, the temperature of the cold trap is prevented from diffusing to the shelf, the surface temperature of the shelf is prevented from being uneven, the cold trap can be closer to the shelf due to the design, water vapor can reach the cold trap more quickly, and the space is more compact, so that higher water catching efficiency can be obtained. Meanwhile, the heating net is of a net structure, and water vapor in the drying box can rapidly pass through the heating net, so that the water catching efficiency is improved.

The valve is an electromagnetic valve, and the electromagnetic valve and the temperature sensor are connected with a control system of the freeze dryer.

The design realizes automatic control by being connected with a control system of the freeze dryer.

The cold-trap includes the coil pipe body, and the coil pipe body coils outside the cold-trap, and coil pipe body surface still is provided with a plurality of heliciform coil pipe branches, the heliciform coil pipe branch is extended by coil pipe body surface, and along with far away from the coil pipe body, its spiral radius is big more, and adjacent heliciform coil pipe branch is linked together end to end, and the beginning and the end that the heliciform coil pipe branch that are linked together communicate respectively to the beginning and the end of cold-trap coil pipe body.

This kind of design sets up heliciform coil pipe branch through the coil pipe body originally at the cold trap, makes its efficiency of catching water promote.

The air source can be an air source in a cooling/heating circulating system of the freeze dryer, or an external air source, preferably an external independent air source.

Drawings

Fig. 1 is the structure schematic diagram of the utility model with part of the coil main body omitted.

Wherein: 1. drying cabinet, 2, shelf, 3, cold trap, 31, coil body, 32, spiral coil branch, 4, regulation layer, 41, heating net.

Detailed Description

As shown in fig. 1, a high-efficiency fruit and vegetable freeze dryer comprises a drying box 1, a shelf 2 arranged in the drying box 1 and a cold trap 3 arranged in the drying box 1, wherein an adjusting layer 4 is arranged between the shelf 2 and the cold trap 3, the drying box 1 is divided into two spaces by the adjusting layer 4, the adjusting layer 4 is composed of at least two heating nets 41 arranged at intervals, the heating nets 41 are net-shaped structures made of heat conducting pipes, the pipes of the whole heating net 41 are communicated, the heating nets 41 are at least provided with an air vent and an air vent inlet, the air vent inlet is connected with an air source through a valve, the air vent is communicated with the outside of the drying box through another valve, and the heating nets are further connected with a temperature sensor.

Wherein, heat conduction tubular product is copper pipe, aluminum pipe etc. and does not set up the one side at the drying cabinet door according to the common sense cold-trap, and finally, adjustment layer 4 sets up to best: the two heating nets 41 are parallel to each other, and the two heating nets are staggered with the meshes of the two heating nets being staggered.

It can be clear that the utility model discloses an improvement part only relates to inside the drying cabinet, therefore, other basic structure of freeze dryer do not do the repeated description here, and all freeze dryers including the drying cabinet of this structure are all in the protection scope of the utility model.

All valves are electromagnetic valves, and the electromagnetic valves and the temperature sensors are connected with a control system of the freeze dryer.

Cold-trap 3 includes coil pipe body 31, for making the drawing more clear, the latter half has been saved to coil pipe body 31 in the drawing, and coil pipe body 31 coils outside cold-trap 3, and coil pipe body 31 surface still is provided with a plurality of heliciform coil pipe branches 32, heliciform coil pipe branch 32 is extended by coil pipe body 31 surface, along with apart from coil pipe body 31 more far away, its spiral radius is big more, and adjacent heliciform coil pipe branch 32 is linked together end to end, and the beginning and the end that the heliciform coil pipe branch that is linked together communicate to cold-trap coil pipe body 31 respectively to cold-trap coil pipe body 31's beginning and end.

In this embodiment, the air source is an external independent air source.

Alternatively, the air source may be an internal air source, specifically, the shelf 2 is an air medium heating type shelf, and has an air inlet and an air outlet, the air source is an internal air source, that is, the air inlet is respectively communicated with the electromagnetic valve and the air inlet, the air outlet is respectively communicated with the electromagnetic valve and the air outlet, and both the electromagnetic valves are connected with the control system of the freeze dryer.

Claims (4)

1. The utility model provides a high-efficient type fruit vegetables freeze dryer, includes the drying cabinet, sets up the shelf in the drying cabinet and sets up the cold trap in the drying cabinet, its characterized in that: the drying box is characterized in that an adjusting layer is arranged between the shelf and the cold trap, the drying box is divided into two spaces by the adjusting layer, the adjusting layer at least comprises two heating nets arranged at intervals, each heating net is of a net structure made of heat conducting pipes, the pipes of the whole heating net are communicated, each heating net is at least provided with a ventilation outlet and a ventilation inlet, the ventilation inlets are connected with an air source through valves, the ventilation outlets are communicated with the outside of the drying box through another valve, and the heating nets are further connected with temperature sensors.

2. The high-efficiency fruit and vegetable freeze dryer as claimed in claim 1, wherein: the valve is an electromagnetic valve, and the electromagnetic valve and the temperature sensor are connected with a control system of the freeze dryer.

3. The high-efficiency fruit and vegetable freeze dryer according to claim 1 or 2, wherein: the cold-trap includes the coil pipe body, and the coil pipe body coils outside the cold-trap, and coil pipe body surface still is provided with a plurality of heliciform coil pipe branches, the heliciform coil pipe branch is extended by coil pipe body surface, and along with far away from the coil pipe body, its spiral radius is big more, and adjacent heliciform coil pipe branch is linked together end to end, and the beginning and the end that the heliciform coil pipe branch that are linked together communicate respectively to the beginning and the end of cold-trap coil pipe body.

4. The high-efficiency fruit and vegetable freeze dryer according to claim 1 or 2, wherein: the air source is an external independent air source.

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