Household vacuum freeze dryer plate layer

Abstract

The utility model discloses a household vacuum freeze dryer plate layer which comprises an upper plate layer and a lower plate layer which are arranged up and down, a middle partition plate is arranged between the upper plate layer and the lower plate layer, a refrigerant layer is formed between the upper plate layer and the middle partition plate, and a hot fluorine layer is formed between the middle partition plate and the lower plate layer. A plurality of refrigerant reinforcing ribs are arranged between the middle partition plate and the upper plate layer, so that a snakelike refrigerant channel is formed in the refrigerant layer, and hot fluorine layer reinforcing ribs are arranged between the lower plate layer and the middle partition plate, so that a hot fluorine channel is formed in the hot fluorine layer; a refrigerant and a heating medium can be directly input, loss caused by conduction of an intermediate medium is reduced, meanwhile, the temperature control response time is shortened, the refrigerant / hot fluorine is in direct contact with a plate layer, the pre-freezing time is shortened by more than 50%, and the temperature uniformity is improved; the serpentine channel is adopted for conveying the refrigerant and the heating medium, the temperature difference of the surface of the material can be accurately controlled, the structure is simplified, the sealing performance is enhanced, the reinforcing rib structure can improve the compression resistance effect of the plate layer, heat input during welding is reduced, and warping of the plate layer is restrained.

Description

TECHNICAL FIELD

[0001] The utility model relates to a freeze drying machine technical field, concretely relates to a domestic vacuum freeze drying machine board layer. BACKGROUND

[0002] The current domestic vacuum freeze drying machine mostly adopts a heating plate as the board layer, the refrigeration system (cold trap) is physically isolated from the heating plate layer, relies on air heat transfer, and has slow response speed (30-60 minutes are needed for pre-freezing to -40 DEG C), and temperature uniformity is poor, and in pharmaceutical use and large-scale food vacuum freeze drying machine, single medium circulation type is mostly adopted, that is, a single board layer is embedded with a serpentine flow channel, cold / heat is transferred through intermediate medium such as silicon oil and heat-conducting oil, secondary heat transfer is needed, and energy loss is significant, and the process of welding the traditional single medium circulation type board layer can produce significant thermal stress, leading to board layer warping deformation. SUMMARY

[0003] In view of the defects in the prior art, the utility model aims at providing a domestic vacuum freeze drying machine board layer, solving the problems of slow response speed, poor temperature uniformity, significant energy loss, significant welding thermal stress and serious board layer deformation of the existing domestic vacuum freeze drying machine freeze dryer.

[0004] The utility model adopts the technical scheme of a domestic vacuum freeze drying machine board layer, which comprises upper and lower arranged upper and lower board layers, a middle partition plate is arranged between the upper and lower board layers, a refrigerant layer is formed between the upper board layer and the middle partition plate, and a hot fluorine layer is formed between the middle partition plate and the lower board layer, a plurality of refrigerant reinforcing ribs are arranged between the middle partition plate and the upper board layer to form a serpentine refrigerant passage in the refrigerant layer, and the outer side of the middle partition plate is provided with a refrigerant inlet and a refrigerant outlet communicated with the refrigerant passage, and a hot fluorine layer reinforcing rib is arranged between the lower board layer and the middle partition plate to form a hot fluorine passage in the hot fluorine layer, and the outer side of the lower board layer is provided with a hot fluorine inlet and a hot fluorine outlet communicated with the hot fluorine passage.

[0005] The freeze drying machine board provided in the technical scheme adopts a multi-layer structure, the refrigerant inlet and the refrigerant outlet are connected with a refrigerant pipeline, the refrigerant can directly enter the refrigerant passage without passing through the medium when in use, the board layer can be cooled faster, the material pre-freezing temperature can be reached faster, the freeze drying time is shortened, and the heat transfer loss is small. Similarly, the hot fluorine inlet and the hot fluorine outlet can be connected with a heat medium pipeline, the heat medium can be input into the hot fluorine passage, the cold and hot flow can be balanced through the middle partition plate, and the effect of precise temperature control is achieved.

[0006] Preferably, the refrigerant reinforcing ribs and the hot fluorine layer reinforcing ribs are respectively welded and fixed on the surfaces opposite to the upper and lower board layers of the middle partition plate.

[0007] Preferably, the upper plate layer is provided with upper welding holes arranged at intervals corresponding to the positions of each refrigerant reinforcing rib, and the diameter of the upper welding hole is adapted to the width of the refrigerant reinforcing rib.

[0008] Preferably, the lower plate layer is provided with lower welding holes arranged at intervals corresponding to the positions of each hot fluorine layer reinforcing rib, and the diameter of the lower welding hole is adapted to the width of the hot fluorine layer reinforcing rib.

[0009] The utility model discloses a beneficial effect is: the utility model discloses can directly input refrigerant and heat medium, reduces the loss caused by intermediate medium conduction, shortens the temperature control response time simultaneously, realizes refrigerant / hot fluorine direct contact plate layer, and pre-freezing time is shortened by 50% or more, and temperature uniformity is promoted, adopts the serpentine channel to transport refrigerant and heat medium can also control the temperature difference of material surface accurately, simplifies the structure and enhances the sealing property, and the reinforcing rib structure can also promote the plate layer pressure resistance effect, and the heat input when welding is reduced, and the plate layer warping is inhibited, has higher practical value. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, various elements or parts are not necessarily drawn according to the actual proportion.

[0011] Figure 1 It is an explosion view of the plate layer of the household vacuum freeze-drying machine provided in the embodiment of the utility model.

[0012] Figure 2 It is a perspective view of the plate layer of the household vacuum freeze-drying machine provided in the embodiment of the utility model.

[0013] The drawings are as follows: upper plate layer 100, upper welding hole 110, lower plate layer 200, middle partition plate 300, refrigerant reinforcing rib 400, refrigerant inlet 500, refrigerant outlet 600, hot fluorine layer reinforcing rib 700, hot fluorine inlet 800, hot fluorine outlet 900. DETAILED DESCRIPTION

[0014] The embodiments of the technical scheme of the utility model will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the utility model, therefore only as an example, and cannot limit the protection scope of the utility model.

[0015] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be the usual meaning understood by the skilled person in the field of the utility model.

[0016] As Figure 1 And Figure 2The utility model discloses a kind of household vacuum freeze-drying machine plate layers, with high structural strength, temperature control precision and other technical advantages;Including upper and lower arrangement upper plate layer 100 and lower plate layer 200, upper plate layer 100 and lower plate layer 200 between being equipped with middle partition 300, upper plate layer 100 and middle partition 300 form refrigerant layer between, middle partition 300 and lower plate layer 200 form hot fluorine layer between;The middle partition 300 and upper plate layer 100 between being equipped with several refrigerant reinforcing ribs 400, form serpentine refrigerant passage in refrigerant layer, middle partition 300 outside being equipped with refrigerant inlet 500 and refrigerant outlet 600 communicated with refrigerant passage;The lower plate layer 200 and middle partition 300 between being equipped with hot fluorine layer reinforcing rib 700, form hot fluorine passage in hot fluorine layer, lower plate layer 200 outside being equipped with hot fluorine inlet 800 and hot fluorine outlet 900 communicated with hot fluorine passage.

[0017] As Figure 1 And Figure 2 As shown in the above, the dryer plate provided in the embodiment adopts multi-layer structure, refrigerant pipeline is connected through refrigerant inlet 500 and refrigerant outlet 600, refrigerant can directly enter refrigerant passage without passing through medium when using, so that plate layer can be cooled faster, material pre-freezing temperature can be reached faster, freeze-drying time is shortened, and heat loss amount is small.Reasonably, hot fluorine inlet 800 and hot fluorine outlet 900 can be connected with heat medium pipeline, heat medium can be input into hot fluorine passage, cold and hot flow can be balanced by heat conduction through middle partition 300, so that the effect of accurate temperature control is achieved.Stiffener structure can form serpentine passage inside, and can improve the strength of the whole structure, improve the compression resistance of plate layer, and reduce heat input when welding, inhibit plate layer warping.

[0018] As Figure 1 And Figure 2 As shown in the actual application, temperature sensor is arranged in refrigerant passage and hot fluorine passage, and PID control is adopted, when temperature sensor in refrigerant passage feedbacks too low, refrigerant expansion valve opening degree is outputted, and cold output is controlled;When temperature sensor in hot fluorine passage feedbacks, hot fluorine proportional valve opening degree is outputted, and heat output is controlled;Upper and lower layers are cooperatively controlled, cold and hot flow is balanced by heat conduction through middle partition 300, so that the effect of accurate temperature control is achieved.

[0019] As Figure 1 And Figure 2As shown, in actual production and processing, the refrigerant stiffener 400 and the hot fluorine layer stiffener 700 are respectively welded and fixed on the surfaces of the middle partition plate 300 opposite to the upper plate layer 100 and the lower plate layer 200. In this way, when the refrigerant stiffener 400 and the hot fluorine layer stiffener 700 are welded, cold welding can be used, and the refrigerant layer stiffener and the hot fluorine layer stiffener 700 are symmetrically welded according to the positions on the partition plate, so as to balance the residual stress and form a serpentine channel. In order to fix the upper plate layer 100 and the lower plate layer 200, the upper plate layer 100 is provided with upper welding holes 110 arranged at intervals corresponding to the positions of each refrigerant stiffener 400, and the diameter of the upper welding hole 110 is adapted to the width of the refrigerant stiffener 400. The lower plate layer 200 is provided with lower welding holes arranged at intervals corresponding to the positions of each hot fluorine layer stiffener 700, and the diameter of the lower welding hole is adapted to the width of the hot fluorine layer stiffener 700. In this way, after the stiffeners are fixed, the upper welding holes 110 and the lower welding holes can be filled with the holes using an electrode to fill the holes, and in actual operation, the current size is 170 to 200 A, the tungsten electrode diameter is 3 mm, the welding wire diameter is 2.5 mm, the gas flow is 12 L / min, the front gas time is 1.5 to 2 s, the rear gas time is 3 to 5 s, the spot welding time is 80 to 100 ms, and the idle time is 200 to 500 ms; finally, the upper plate layer 1 and the lower plate layer 4 are respectively welded on the refrigerant layer stiffener and the hot fluorine layer stiffener 700.

[0020] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application.

Claims

1. A domestic vacuum freeze-dryer tray characterised in that; The application relates to a refrigerant plate heat exchanger, which comprises an upper plate layer (100) and a lower plate layer (200) arranged in a vertical direction, a middle partition plate (300) arranged between the upper plate layer (100) and the lower plate layer (200), a refrigerant layer formed between the upper plate layer (100) and the middle partition plate (300), and a hot fluorine layer formed between the middle partition plate (300) and the lower plate layer (200). A plurality of refrigerant reinforcing ribs (400) are arranged between the middle partition plate (300) and the upper plate layer (100) to form a serpentine refrigerant channel in the refrigerant layer, and a refrigerant inlet (500) and a refrigerant outlet (600) are arranged outside the middle partition plate (300) and communicate with the refrigerant channel. A hot fluorine layer reinforcing rib (700) is arranged between the lower plate layer (200) and the middle partition plate (300) to form a hot fluorine channel in the hot fluorine layer, and a hot fluorine inlet (800) and a hot fluorine outlet (900) are arranged outside the lower plate layer (200) and communicate with the hot fluorine channel.

2. A domestic scale vacuum freeze-dryer shelf according to claim 1, wherein; The refrigerant reinforcing ribs (400) and the hot fluorine layer reinforcing rib (700) are respectively welded and fixed on the surfaces of the middle partition plate (300) opposite to the upper plate layer (100) and the lower plate layer (200).

3. A domestic scale vacuum freeze-dryer shelf according to claim 1, wherein; An upper welding hole (110) is arranged on the upper plate layer (100) and corresponds to the position of each refrigerant reinforcing rib (400), and the upper welding hole (110) is arranged at intervals and has a diameter suitable for the width of the refrigerant reinforcing rib (400).

4. A domestic scale vacuum freeze-dryer shelf according to claim 1, wherein; A lower welding hole is arranged on the lower plate layer (200) and corresponds to the position of each hot fluorine layer reinforcing rib (700), and the lower welding hole is arranged at intervals and has a diameter suitable for the width of the hot fluorine layer reinforcing rib (700).

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