Small vacuum freeze dryer

Abstract

The utility model relates to a small vacuum freeze dryer. The freeze dryer is simple and small in structure and comprises a machine shell, a freeze-drying chamber assembly, a control system, a refrigerating unit and a vacuum pump. The freeze-drying chamber assembly forms a closed space which is a place for freeze-drying materials; the refrigerating unit comprises a condenser, a compressor, a plate heat exchanger and a coil pipe, the coil pipe is an inner-outer double-layer spiral coil pipe, the refrigerating unit refrigerates and cools the freeze-drying chamber through the double-layer coil pipe, the vacuum pump is connected with the freeze-drying chamber through a pipeline outside the machine shell, the freeze-drying chamber is in a vacuum state, and materials in the freeze-drying chamber assembly sublimate moisture in a vacuum low-temperature environment to be freeze-dried. The utility model provides a small-sized household or laboratory vacuum freeze-drying machine, which is small in overall size, simple in structure, convenient to operate, large in usable freeze-drying space, low in energy consumption and low in use cost, and facilitates freeze-drying of foods, health-care products and the like in families and freeze-drying of a small amount of materials and process exploration in laboratories.

Description

Technical Field

[0001] The utility model relates to a small vacuum freeze drying machine, in particular to a small vacuum freeze drying machine applied to households or laboratories. Background Art

[0002] In order to improve the quality of life, some modern families have an increasing demand for small household freeze dryers with exquisite structure and simple operation in order to obtain food or health products that are durable, good in color, good in taste, and high in nutritional content. When the laboratory is exploring the freeze-drying quality characteristics of samples and exploring the freeze-drying process, it usually takes a small amount of samples for freeze-drying experiments, and there is also a certain demand for small freeze dryers. At present, there are various types of small household or experimental freeze dryers on the market. These freeze dryers have their own advantages, but most household freeze dryers are large in size, complex in structure, high in price, high in energy consumption, and high in cost of use. In the laboratory test stage, it is also hoped to use a small freeze dryer that is small in size, easy to place, convenient to operate, and has low energy consumption. Utility Model Content

[0003] The problem to be solved by the utility model is to provide a small vacuum freeze dryer for household or laboratory use which has delicate structure, small volume and simple operation.

[0004] The utility model discloses a small vacuum freeze dryer, comprising a casing, a freeze drying chamber assembly, a control system, a refrigeration unit and a vacuum pump. The freeze drying chamber assembly is installed on the casing and comprises a bell jar, a material rack, a sealing ring, a flat bottom plate and a flat bottom plate protective cover. The refrigeration unit is arranged in the casing and the freeze drying chamber assembly. The refrigeration of the refrigeration unit is used to reduce the temperature in the freeze drying chamber assembly. The refrigeration unit comprises a condenser, a compressor, a plate heat exchanger and a coil. The vacuum pump is arranged outside the casing and connected to the freeze drying chamber assembly through a pipeline.

[0005] The utility model discloses a small vacuum freeze dryer, wherein the material rack in the freeze drying chamber assembly is loaded with materials for pre-freezing and then placed above the coil, and the materials sublimate water under vacuum and low temperature conditions and are captured and fixed by the coil in time.

[0006] The utility model discloses a small vacuum freeze dryer, wherein the material rack is designed as two layers, so as to increase the material holding capacity, and the distance between the two layers can also meet the requirements of placing materials in various states and using most laboratory freeze-drying bottles.

[0007] In the small vacuum freeze dryer of the utility model, the space between the flat bottom plate and the flat bottom plate protective cover is filled by a foaming method, which is convenient and quick to operate and can meet the heat preservation requirements of the flat bottom plate while fixing the flat bottom plate.

[0008] The utility model discloses a small vacuum freeze dryer, wherein the coils in the refrigeration unit are arranged in the freeze drying chamber assembly, below the material rack, and the inlet and outlet of the coils pass through the flat bottom plate to communicate with other refrigeration components in the shell to reduce the temperature of the freeze drying chamber.

[0009] The utility model discloses an intelligent vacuum freeze dryer for laboratory use, wherein the coil is an inner and outer double-layer structure. The coil is designed as a double-layer structure, which can reduce the number of coil turns and the height of the coil under the condition of meeting the water capture amount, thereby reducing the height of the whole machine and making the freeze dryer more compact as a whole.

[0010] The utility model discloses an intelligent vacuum freeze dryer for laboratory use, wherein the coil is externally arranged, and a cold trap of a traditional freeze dryer is not provided. The coil does not need to cool the cold trap so that the cold trap captures the water sublimated from the material, but the coil directly captures the water, and the structure of the machine is simpler.

[0011] The utility model discloses an intelligent vacuum freeze dryer for laboratory use, wherein a vacuum meter is connected to the pipeline connecting the vacuum pump and the freeze drying chamber component, and the vacuum meter can detect the vacuum degree in the freeze drying component to judge whether the material is freeze dried.

[0012] The beneficial effects of the utility model include:

[0013] 1. The whole machine has a simple structure, small size, and small space occupation, but it has a large freeze-drying space, which can meet the use of home or laboratory.

[0014] 2. The whole machine has low energy consumption, simple operation and convenient use, so that families or laboratories can use the freeze dryer at low cost.

[0015] 3. The production process is relatively simple compared to traditional freeze dryers, which can reduce the company's production and inventory costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a small vacuum freeze dryer of the utility model;

[0017] Figure 2 It is a three-dimensional diagram of the small vacuum freeze dryer of the utility model;

[0018] Figure 3 This is a front view of the small vacuum freeze dryer of the utility model;

[0019] Figure 4 It is a left view of the small vacuum freeze dryer of the utility model;

[0020] Figure 5 It is a right view of the small vacuum freeze dryer of the utility model; DETAILED DESCRIPTION

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the small vacuum freeze dryer of the utility model includes a casing 1, a freeze drying chamber assembly 2, a control system 3, a refrigeration unit 4, and a vacuum pump 5.

[0022] The small vacuum freeze drying machine casing 1 of the utility model has a delicate appearance and structure.

[0023] The freeze-drying chamber assembly 2 of the small vacuum freeze-drying machine of the utility model is placed on the casing 1, and the freeze-drying chamber assembly 2 includes a bell jar 201, a material rack 202, a sealing ring 203, a flat bottom plate 204 and a flat bottom plate protective cover 205.

[0024] The bell jar 201, the sealing ring 203, and the flat bottom plate 204 form a closed space, which is a vacuum and low-temperature place for freeze-drying the material. The bell jar 201 is made of transparent material, which is convenient for observing the freeze-drying state of the material.

[0025] The material rack 202 is used to hold freeze-dried materials, which can be taken out from the freeze-drying chamber assembly 2 for pre-freezing. The material rack has a double-layer structure, which can increase the material holding capacity. The spacing between the two layers can also meet the needs of placing materials in various states and the use of most laboratory freeze-drying bottles.

[0026] The space between the flat bottom plate 204 and the flat bottom plate protective cover 205 is filled with foaming method, which can not only fix the flat bottom plate, but also meet the insulation requirements of the flat bottom plate. Compared with the traditional method of wrapping the cold trap with insulation cotton, the operation is more convenient and quicker.

[0027] The control system 3 of the small vacuum freeze dryer of the present invention comprises a distribution box 301 and a control panel 302. The distribution box 301 is placed in the casing 1, and the control panel 302 is installed on the casing 1. The freeze dryer can be conveniently operated through the control panel 302.

[0028] The refrigeration unit 4 of the small vacuum freeze dryer of the utility model includes a condenser 401, a compressor 402, a plate heat exchanger 403, and a coil 404. The condenser 401, the compressor 402, and the plate heat exchanger 403 are placed in the casing 1, and the coil 404 is placed in the freeze drying chamber assembly 2.

[0029] The coil 404 is a double-layer spiral coil. The coil is designed as a double-layer structure. Under the condition of meeting the water capture amount, the number of coil turns can be reduced, the coil height can be lowered, and the height of the whole machine can be reduced, making the freeze dryer more compact as a whole.

[0030] The plate heat exchanger 403 is used in the refrigeration unit 4 to improve the working efficiency of the refrigeration unit.

[0031] The vacuum pump 5 of the small vacuum freeze dryer of the utility model is arranged outside the casing 1 and is connected to the pipeline 5 extending from the freeze drying chamber assembly 2 through the vacuum hose 7, so that the freeze drying chamber assembly reaches a vacuum condition.

[0032] The material rack 202 of the small vacuum freeze dryer of the present invention is loaded with materials for pre-freezing and then placed on the double-layer coil 404. Under the vacuum and low temperature conditions of the freeze-drying chamber assembly, the moisture in the materials sublimates and is captured by the double-layer coil at low temperature, and the materials gradually reach a dry state.

[0033] A vacuum meter is installed on the pipe 5 extending from the freeze-drying chamber assembly 2 of the small vacuum freeze dryer of the utility model. The vacuum meter can detect the vacuum degree in the freeze-drying assembly to determine whether the material is freeze-dried.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made without departing from the principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A small vacuum freeze dryer, comprising a casing, a freeze drying chamber assembly, a control system, a refrigeration unit, and a vacuum pump. The freeze drying chamber assembly is installed on the casing and comprises a bell jar, a material rack, a sealing ring, a flat bottom plate, and a flat bottom plate protective cover; the refrigeration unit is arranged in the casing and the freeze drying chamber assembly, and the refrigeration of the refrigeration unit is used to reduce the temperature in the freeze drying chamber assembly. The refrigeration unit comprises a condenser, a compressor, a plate heat exchanger, and a coil; the vacuum pump is arranged outside the casing and connected to the freeze drying chamber assembly through a pipeline.

2. The small vacuum freeze dryer according to claim 1 is characterized in that the coil is arranged in the freeze-drying chamber assembly, and the coil inlet and outlet pass through the flat bottom plate to communicate with other refrigeration components in the casing to reduce the temperature of the freeze-drying chamber.

3. The small vacuum freeze dryer according to claim 1 is characterized in that the coil is an inner and outer double-layer structure. The coil is designed as a double-layer structure, which can reduce the number of coil turns and the coil height while meeting the water capture capacity, thereby reducing the height of the entire machine.

4. The small vacuum freeze dryer according to claim 1 or 2 is characterized in that the coil is external and no cold trap is used. The coil does not need to cool the cold trap so that the cold trap captures the moisture sublimated from the material, but the coil directly captures the moisture, and the structure of the machine is simpler.

5. The small vacuum freeze dryer according to claim 1, 2 or 3 is characterized in that the material rack is placed above the coil, and the material sublimates water under vacuum and low temperature conditions and is captured and fixed by the double-layer coil in time.

6. The small vacuum freeze dryer according to claim 1 is characterized in that the space between the flat bottom plate and the flat bottom plate protective cover is filled by a foaming method, which is convenient and quick to operate, and can not only fix the flat bottom plate, but also meet the insulation requirements of the flat bottom plate.

7. The small vacuum freeze dryer according to claim 1 is characterized in that a vacuum meter is connected to the pipeline connecting the vacuum pump and the freeze drying chamber assembly, and the vacuum meter can detect the vacuum degree in the freeze drying assembly to determine whether the freeze drying of the material is completed.

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