CN219045837U - Freeze dryer that heat exchange efficiency is high - Google Patents

Abstract

The utility model discloses a freeze dryer with high heat exchange efficiency, which comprises a cooling unit positioned at the rear side of a drying box, wherein the cooling unit comprises a bottom plate fixed at the rear side of a shell of the drying box, a double-pipe evaporator, a compressor, a condenser and a control cabinet are fixed on the bottom plate, a thermal expansion valve is fixed on the side edge of the compressor, the compressor is connected with the condenser through a hose, after two evaporators of the double-pipe evaporator are communicated, one evaporator is communicated with the thermal expansion valve, the other evaporator is connected with the compressor, a gas conveying pipeline for heat exchange with the double-pipe evaporator is arranged above the double-pipe evaporator, and a gas inlet and a gas outlet are arranged on the gas conveying pipeline. This structure improves the heat transfer effect.

Description

Freeze dryer that heat exchange efficiency is high

Technical Field

The utility model relates to the technical field of dryers, in particular to a freeze dryer with high heat exchange efficiency.

Background

The working principle of the freeze dryer is that the dried articles are frozen below the triple point temperature, then solid water (ice) in the articles is sublimated directly into water vapor under the vacuum condition, and the water vapor is removed from the articles, so that the articles are dried.

The freeze dryer generally comprises a compressor, a condenser, an evaporator, a heater, a drying box and the like, but the existing compressor, condenser and evaporator are generally directly installed at the bottom of the drying box, once the air conditioner fails, the outer cover needs to be opened firstly, then the drying box inside the air conditioner is lifted, the bottom of the air conditioner faces upwards, the air conditioner is inconvenient to maintain relatively, and the existing evaporator adopts a common structure, so that the heat exchange effect is poor, and improvement is needed.

Disclosure of Invention

The utility model aims to provide a freeze dryer with high heat exchange efficiency, which is used for solving the defects of inconvenient maintenance and poor heat exchange effect of the existing adsorption dryer.

(II) summary of the utility model

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a freeze dryer that heat exchange efficiency is high, includes the cooling unit that is located the drying cabinet rear side, its characterized in that: the cooling unit comprises a bottom plate fixed at the rear side of a shell of the drying oven, a double-pipe evaporator, a compressor, a condenser and a control cabinet are fixed on the bottom plate, a thermal expansion valve is fixed on the side edge of the compressor, the compressor is connected with the condenser through a hose, after two evaporators of the double-pipe evaporator are communicated, one evaporator is communicated with the thermal expansion valve, the other evaporator is connected with the compressor, a gas conveying pipeline for heat exchange with the double-pipe evaporator is arranged above the double-pipe evaporator, and a gas inlet and a gas outlet are arranged on the gas conveying pipeline.

The low-pressure refrigerant in the double-tube evaporator is sucked into the cylinder of the compressor by the compressor, the refrigerant vapor is compressed, the pressure and the temperature are increased at the same time, the high-pressure high-temperature refrigerant vapor is compressed to the condenser, the refrigerant vapor with higher temperature exchanges heat with cooling water or air with lower temperature in the condenser, the refrigerant vapor becomes liquid, the liquid is conveyed to the thermal expansion valve, the liquid is throttled into low-temperature low-pressure liquid by the thermal expansion valve and enters the double-tube evaporator, the low-temperature low-pressure refrigerant liquid in the double-tube evaporator absorbs the heat of compressed air to be vaporized, and the refrigerant vapor in the double-tube evaporator is sucked by the compressor, so that one cycle is completed, and the freeze drying work is completed.

Preferably, in order to play a role in protection, the bottom plate cover is provided with a protective cover body, and the side edge of the protective cover body is provided with a heat dissipation hole.

Preferably, for convenience in fixing, the protective cover body and the bottom plate are fixed by screws.

Preferably, the evaporation tubes in the two evaporators of the double-tube evaporator are of a spiral structure.

Preferably, the space between the base plate and the ground is ensured, the waterproof effect is improved, bending parts which are bent downwards are arranged on two sides of the bottom of the base plate, and a silica gel layer is arranged at the bottom of the bending parts.

Preferably, the inner devices are prevented from being crushed, more than one reinforcing rib is arranged above the inner part of the protective cover body, and an anti-bending plate is fixed between the bottoms of all the reinforcing ribs.

(III) beneficial effects

The freeze dryer with high heat exchange efficiency has the advantages that: the evaporator adopts the double-barrelled structure that returns in this structure, improves the heat transfer effect, further guarantees that dry dewatering effect is better, sets up double-barrelled evaporator, compressor, condenser and switch board alone on the bottom plate simultaneously, makes things convenient for the later stage to maintain fast.

Drawings

Fig. 1 is a perspective view of the structure of the freeze dryer with high heat exchange efficiency disclosed in embodiment 1 without a protective cover;

fig. 2 is a side view of the freeze dryer with high heat exchange efficiency disclosed in example 1 without the protective cover;

fig. 3 is a schematic view of the overall structure of a freeze dryer with high heat exchange efficiency disclosed in this embodiment 1;

fig. 4 is a schematic view showing the internal structure of one of the evaporators disclosed in embodiment 2;

fig. 5 is a perspective view showing the structure of the freeze dryer with high heat exchange efficiency without the protective cover in example 3;

fig. 6 is a schematic view showing the internal structure of the protective cover disclosed in embodiment 4.

In the reference numerals:

the cooling unit 1, the bottom plate 1-1, the double-tube evaporator 2, the compressor 3, the condenser 4, the control cabinet 5, the thermal expansion valve 6, the gas conveying pipeline 7, the gas inlet 8, the gas outlet 9, the protective cover body 10, the heat dissipation holes 11, the evaporation tube 2-1, the bending part 1-2, the silica gel layer 1-3, the reinforcing ribs 12 and the bending prevention plate 13.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described in the following in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without inventive faculty, are intended to be within the scope of the present utility model, based on the embodiments of the present utility model.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Example 1

As shown in fig. 1-3, one embodiment provided by the present utility model is: the utility model provides a freeze dryer that heat exchange efficiency is high, includes cooling unit 1 that is located the drying cabinet rear side, its characterized in that: the cooling unit 1 comprises a bottom plate 1-1 fixed at the rear side of a drying box shell, a double-tube evaporator 2, a compressor 3, a condenser 4 and a control cabinet 5 are fixed on the bottom plate 1-1, a thermal expansion valve 6 is fixed at the side edge of the compressor 3, the compressor 3 is connected with the condenser 4 through a hose, after two evaporators of the double-tube evaporator 2 are communicated, one evaporator is communicated with the thermal expansion valve 6, the other evaporator is connected with the compressor 3, a gas conveying pipeline 7 for heat exchange with the double-tube evaporator 2 is arranged above the double-tube evaporator 2, and an air inlet 8 and an air outlet 9 are arranged on the gas conveying pipeline 7.

Preferably, in order to perform a protection function, a protective cover 10 is provided on the bottom plate 1-1, and heat dissipation holes 11 are provided on the side of the protective cover 10.

Preferably, for convenience of fixing, the protective cover 10 is fixed to the bottom plate 1-1 by screws.

When the freeze dryer is used, the low-pressure refrigerant in the double-tube evaporator 2 is sucked into the compressor cylinder by the compressor 3, the refrigerant vapor is compressed, the pressure and the temperature are increased simultaneously, the high-pressure high-temperature refrigerant vapor is compressed to the condenser 4, the refrigerant vapor with higher temperature exchanges heat with cooling water or air with lower temperature in the condenser 4, the refrigerant vapor is changed into liquid, the liquid is conveyed to the thermal expansion valve 6, the liquid is throttled into low-temperature low-pressure liquid through the thermal expansion valve 6 and enters the double-tube evaporator 2, the low-temperature low-pressure refrigerant liquid in the double-tube evaporator 2 absorbs the heat of compressed air to be vaporized, the refrigerant vapor in the double-tube evaporator 2 is sucked away by the compressor 3, so that one cycle is completed, the freeze drying work is completed, the double-tube evaporator adopts a double-temperature return structure in the structure, the heat exchange effect is improved, the drying and the water removal effect is better is further ensured, and meanwhile, the double-tube evaporator 2, the compressor 3, the condenser 4 and the control cabinet 5 are independently arranged on the base plate 1-1, and the double-tube evaporator is convenient to maintain and fast.

Example two

As shown in fig. 4, the present utility model further provides an embodiment: preferably, the evaporating pipes 2-1 in the two evaporators of the double-pipe evaporator 2 are in spiral structures, and the heat exchange time is ensured to be long by adopting the spiral structures of the evaporating pipes 2-1 in the evaporators.

Example III

As shown in fig. 5, the present utility model further provides an embodiment: preferably, the space between the base plate and the ground is ensured, the waterproof effect is improved, the two sides of the bottom of the base plate 1-1 are provided with bending parts 1-2 which bend downwards, the bottom of the bending parts 1-2 is provided with a silica gel layer 1-3, the two sides of the bottom of the base plate 1-1 are provided with bending parts 1-2 which bend downwards, the bottom of the bending parts 1-2 is provided with the silica gel layer 1-3, the skid resistance is improved by using the silica gel layer 1-3, the space between the ground is ensured by using the bending parts 1-2, and the waterproof effect is improved.

Example IV

As shown in fig. 6, the present utility model further provides an embodiment: preferably, the protection cover 10 is provided with more than one reinforcing rib 12 above the inside thereof, and an anti-bending plate 13 is fixed between the bottoms of all the reinforcing ribs 12, so that the overall hardness of the upper part of the protection cover is improved through the structure, and the components below the protection cover are prevented from being crushed.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (6)

1. The utility model provides a freeze dryer that heat exchange efficiency is high, includes cooling unit (1) that are located the drying cabinet rear side, its characterized in that: the cooling unit (1) including fixing bottom plate (1-1) at the drying cabinet shell rear side, be fixed with double-barrelled evaporimeter (2), compressor (3), condenser (4) and switch board (5) on bottom plate (1-1), be fixed with thermostatic expansion valve (6) at compressor (3) side, compressor (3) and condenser (4) pass through hose connection, after two evaporimeters intercommunication of double-barrelled evaporimeter (2), one of them evaporimeter and thermostatic expansion valve (6) intercommunication, another evaporimeter is connected with compressor (3), double-barrelled evaporimeter (2) top is provided with gas delivery pipeline (7) that carry out heat exchange with double-barrelled evaporimeter (2), be provided with air inlet (8) and gas outlet (9) on gas delivery pipeline (7).

2. A freeze dryer with high heat exchange efficiency according to claim 1, wherein: the bottom plate (1-1) is covered with a protective cover body (10), and the side edge of the protective cover body (10) is provided with a heat dissipation hole (11).

3. A freeze dryer with high heat exchange efficiency according to claim 2, wherein: the protective cover body (10) is fixed with the bottom plate (1-1) through screws.

4. A freeze dryer with high heat exchange efficiency according to claim 1, wherein: the evaporating pipes (2-1) in the two evaporators of the double-pipe evaporator (2) are of spiral structures.

5. A freeze dryer with high heat exchange efficiency according to claim 1, wherein: the bottom of the bottom plate (1-1) is provided with bending parts (1-2) which are bent downwards, and the bottom of the bending parts (1-2) is provided with a silica gel layer (1-3).

6. A freeze dryer with high heat exchange efficiency according to claim 2, wherein: more than one reinforcing rib (12) is arranged above the inside of the protective cover body (10), and an anti-bending plate (13) is fixed between the bottoms of all the reinforcing ribs (12).

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