CN219272624U - Freezing dryer - Google Patents

Abstract

The utility model discloses a freeze dryer, which comprises a shell, a refrigerating system and a separating system, wherein the shell is provided with an accommodating space; the refrigerating system is positioned in the accommodating space and comprises a compressor and a first channel communicated with the compressor, and the compressor can input a refrigerant into the first channel; the separation system comprises a first pipe joint, a second pipe joint, a steam-water separator positioned in the accommodating space, a second channel and at least one air filter, wherein one end of the steam-water separator is installed on the first pipe joint, the first pipe joint penetrates through the shell and is used for being connected with an external air compressor, one end of the air filter is installed on the second pipe joint, the second pipe joint penetrates through the shell, the other ends of the steam-water separator and the air filter are respectively communicated with two ends of the second channel, compressed air can be input into the second channel by the air compressor, a refrigerant in the first channel can be subjected to heat exchange with the compressed air in the second channel, the occupied space is small, and the installation space and the installation cost are saved.

Description

Freezing dryer

Technical Field

The utility model relates to the technical field of dryers, in particular to a freeze dryer.

Background

The air compressor can produce compressed air, and the source of the compressed air is ambient air, and the compressed air produced by the air compressor not only contains a large amount of moisture, but also contains a large amount of pollutants such as aerosol, solid particles, smoke dust, oil vapor and the like.

The dry compressed air is widely applied in production and manufacture, particularly high-end equipment, has extremely high quality requirements on the compressed air, and in order to produce high-quality compressed air and improve the drying efficiency of the freeze dryer, the pollutants in the compressed air need to be removed before the compressed air enters the freeze dryer, so that a plurality of filters need to be additionally arranged before and after the freeze dryer, thereby achieving the purpose of using clean compressed air.

However, these filters require separate piping, take up excessive space, and are correspondingly costly.

Disclosure of Invention

The utility model provides a freeze dryer, which aims to solve the technical problems that in the prior art, filters are additionally arranged at the front and the back of the freeze dryer, so that the aim of using clean compressed air is fulfilled, the filters are required to be independently provided with pipelines, excessive space is occupied, and the cost is correspondingly increased.

The utility model provides a freeze dryer, comprising:

a housing having an accommodation space;

the refrigerating system is positioned in the accommodating space and comprises a compressor and a first channel communicated with the compressor, and the compressor can input a refrigerant into the first channel;

the separation system comprises a first pipe joint, a second pipe joint, a steam-water separator, a second channel and at least one air filter, wherein the steam-water separator, the second channel and the at least one air filter are arranged in the accommodating space, one end of the steam-water separator is installed in the first pipe joint, the first pipe joint penetrates through the shell and is used for being connected with an external air compressor, one end of the air filter is installed in the second pipe joint, the second pipe joint penetrates through the shell, the other ends of the steam-water separator and the air filter are respectively communicated with two ends of the second channel, compressed air can be input into the second channel by the air compressor, the first channel is close to the second channel, and a refrigerant in the first channel can be in heat exchange with the compressed air in the second channel.

Further, the refrigerating system further comprises a condenser and a heat exchanger assembly, the compressor, the condenser and the heat exchanger assembly are sequentially connected end to end, the heat exchanger assembly is provided with a first channel and a second channel which is spaced from the first channel, one end of the first channel is communicated with the condenser, and the other end of the first channel is communicated with the compressor.

Further, the freeze dryer further comprises a controller, the refrigerating system further comprises a pressure sensor and a fan for radiating heat of the condenser, the pressure sensor is arranged on a pipeline between the condenser and the heat exchanger assembly, and the compressor, the fan and the pressure sensor are electrically connected with the controller.

Further, the refrigeration system further comprises a pressure gauge penetrating through the shell, and a pipeline between the heat exchanger assembly and the compressor is communicated with the pressure gauge.

Further, the casing is provided with an inclined plane, and the visible surface of the pressure gauge is arranged in parallel with the inclined plane; and/or the number of the groups of groups,

the refrigerating system further comprises a plurality of electronic drain valves, and the electronic drain valves are arranged on water outlets of the heat exchanger assembly, the steam-water separator and the air filter.

Further, the casing includes frame, two side shield and a plurality of transparent plate, the side shield pass through a plurality of knockers detachably install in on the frame, the side shield with the frame encloses into accommodation space, the side shield runs through and is equipped with a plurality of observation windows, the transparent plate is fixed in on the side shield and cover in the observation window.

Further, the number of the air filters is three, and the three air filters are sequentially connected and arranged close to one end of the second pipe joint.

Further, the condenser and the compressor are both fixed on the bottom wall of the accommodating space, the air filter is located right above the condenser, the heat exchanger assembly and the steam-water separator are suspended in the accommodating space, and the air filter and the heat exchanger assembly are oppositely arranged.

Further, the freeze dryer further comprises a bracket arranged side by side with the condenser, the bottom of the bracket is fixed on the bottom wall of the accommodating space, the heat exchanger assembly is installed at the top of the bracket, and the compressor is fixed on the bottom wall of the accommodating space and is located at one side of the condenser.

Further, the separation system further comprises a connecting pipe, two first flange joints and two second flange joints, wherein the two first flange joints are respectively arranged on the end parts of the air filter and the second channel, the two second flange joints are respectively arranged at the two ends of the connecting pipe, the two first flange joints are respectively in butt joint with the two second flange joints, and the second channel, the connecting pipe and the air filter are sequentially communicated.

Compared with the prior art, the utility model has the beneficial effects that at least:

the steam-water separator and the air filter are both positioned in the shell, the steam-water separator and the air filter are respectively connected with the first pipe joint and the second pipe joint, the steam-water separator and the air filter are arranged in the freeze dryer, the steam-water separator and the air filter have the functions of separating water vapor and drying, the steam-water separator and the air filter are not required to be independently provided with pipelines outside the freeze dryer, the whole occupied space is small, and the installation space and the installation cost are saved.

Drawings

Fig. 1 is a schematic structural diagram of a freeze dryer according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of a freeze dryer according to a second embodiment of the present utility model;

FIG. 3 is an exploded view of a freeze dryer according to an embodiment of the present utility model;

FIG. 4 is a second exploded view of a freeze dryer according to an embodiment of the present utility model;

FIG. 5 is a schematic view showing a structure of a freeze dryer according to an embodiment of the present utility model after removing a casing;

FIG. 6 is an exploded view of FIG. 5;

fig. 7 is a schematic diagram II of a freeze dryer according to an embodiment of the present utility model after removing a casing;

fig. 8 is a schematic structural view of a connecting tube according to an embodiment of the present utility model;

fig. 9 is a system flow chart of a freeze dryer according to an embodiment of the present utility model.

In the figure:

10. a housing; 11. an accommodation space; 12. a frame; 121. a window; 122. a base; 123. a front baffle; 1231. an inclined surface; 1232. a first mounting hole; 1233. a second mounting hole; 1234. a third mounting hole; 124. a rear baffle; 1241. a first perforation; 1242. a second perforation; 125. a top plate; 13. side baffles; 131. an observation window; 132. an air inlet; 133. an air outlet; 14. a door catch; 15. a transparent plate; 20. a refrigeration system; 21. a compressor; 22. a condenser; 23. a heat exchanger assembly; 231. a first channel; 232. a second channel; 24. an expansion valve; 25. a pressure sensor; 26. a blower; 27. a high pressure shutdown protector; 28. drying the filter; 29. a pressure gauge; 291. an electronic drain valve; 30. a separation system; 31. a first pipe joint; 32. a second pipe joint; 33. a steam-water separator; 34. an air filter; 35. a connecting pipe; 351. a first arced tube; 352. a first straight tube; 353. a second arced tube; 354. a second straight tube; 36. a first flange joint; 37. a second flange joint; 40. a start-stop button; 50. displaying a button; 60. and (3) a bracket.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.

Referring to fig. 1 to 6, a freeze dryer according to an embodiment of the present utility model includes a housing 10, a refrigeration system 20, and a separation system 30.

The casing 10 has accommodation space 11, first perforation 1241 and second perforation 1242, accommodation space 11 is located the inside of casing 10, and first perforation 1241 and second perforation 1242 all run through in casing 10 and set up, and first perforation 1241 and second perforation 1242 all communicate with accommodation space 11, and refrigerating system 20 is located accommodation space 11, and refrigerating system 20 includes compressor 21 and the first passageway 231 that communicates with compressor 21, and compressor 21 can input the refrigerant to first passageway 231.

The separation system 30 includes a first pipe joint 31, a second pipe joint 32, a steam-water separator 33, a second channel 232 and at least one air filter 34, wherein the steam-water separator 33, the second channel 232 and the air filter 34 are all located in the accommodating space 11, one end of the steam-water separator 33 is installed on the first pipe joint 31, the first pipe joint 31 penetrates through a first through hole 1241 of the casing 10, the first pipe joint 31 is used for being connected with an external air compressor, one end of the air filter 34 is installed on the second pipe joint 32, the second pipe joint 32 penetrates through a second through hole 1242 of the casing 10, the second pipe joint 32 is used for being connected with an external air consuming device, the other ends of the steam-water separator 33 and the air filter 34 are respectively communicated with two ends of the second channel 232, compressed air can be input into the second channel 232 by the air compressor, the first channel 231 is arranged close to the second channel 232, and the first channel 231 can be in heat exchange with the compressed air in the second channel 232. The inside of the freeze dryer is provided with the steam-water separator 33 and the air filter 34, so that the function of separating water vapor in compressed air from dry compressed air is realized, and the steam-water separator 33 and the air filter 34 are not required to be additionally arranged outside the freeze dryer.

The refrigeration system 20 further comprises a condenser 22 and a heat exchanger assembly 23, the compressor 21, the condenser 22 and the heat exchanger assembly 23 are sequentially connected end to end, the heat exchanger assembly 23 is provided with a first channel 231 and a second channel 232 which is spaced from the first channel 231, one end of the first channel 231 is communicated with the condenser 22, the other end of the first channel is communicated with the compressor 21, a steam-water separator 33 is arranged at the front end of the second channel 232 of the heat exchanger assembly 23, a large amount of liquid water in compressed air can be removed firstly, the water content is reduced, and the compressed air enters the heat exchanger assembly 23 with a composite structure, so that the water removing effect of the heat exchanger assembly 23 with the composite structure is improved.

The novel vertical composite heat exchanger assembly 23 is used for the freeze dryer, so that the recycling and water separation effects of the refrigerant are better, the space inside the freeze dryer can be better utilized, and the external dimension of the freeze dryer is further compressed.

The refrigeration system 20 further comprises an expansion valve 24, the expansion valve 24 is arranged between the condenser 22 and the heat exchanger assembly 23, two sets of completely independent systems which are mutually staggered in the heat exchanger assembly 23 are arranged in the freeze dryer, in the refrigeration system 20, the refrigerant from the compressor 21 is in a high-temperature high-pressure gaseous state, the gaseous refrigerant can dissipate heat when passing through the condenser 22 and is changed into a liquid state refrigerant, the flow of the liquid state refrigerant is adjusted by the expansion valve 24 so as to conveniently enter the heat exchanger assembly 23, the liquid state refrigerant in the heat exchanger assembly 23 absorbs heat and evaporates, and a large amount of heat is required to be absorbed by evaporation, so that the heat of compressed air is absorbed in the second channel 232 in the separation system 30, the compressed air is cooled and dehydrated, the refrigerant from the heat exchanger assembly 23 is in a gaseous state, and the refrigerant in the gaseous state finally enters the compressor 21 for recycling the refrigerant.

Referring to fig. 5 to 7, the freeze dryer further includes a controller, the refrigeration system 20 further includes a pressure sensor 25 and a fan 26, the fan 26 is disposed towards the condenser 22 for dissipating heat from the condenser 22, the pressure sensor 25 is mounted on a pipeline between the condenser 22 and the heat exchanger assembly 23, specifically, the pressure sensor 25 is mounted on a pipeline between the condenser 22 and the expansion valve 24, the compressor 21, the fan 26 and the pressure sensor 25 are electrically connected with the controller, and because of a proportional relationship between the refrigerant pressure and the temperature, i.e. when the temperature of the refrigerant in the pipeline between the condenser 22 and the expansion valve 24 changes, the pressure in the pipeline changes correspondingly, so that the embodiment adopts the pressure sensor 25 to replace the traditional temperature sensor, and the refrigeration system 20 changes from the traditional refrigerant temperature control mode to the refrigerant pressure control mode, so as to accurately measure the temperature of the refrigerant exiting the condenser 22.

The pressure sensor 25 can be provided with a pressure early warning value, when the pressure sensor 25 detects that the pressure in the pipeline between the condenser 22 and the expansion valve 24 is too high and exceeds the pressure early warning value, the fan 26 is started, when the pressure sensor 25 detects that the pressure in the pipeline between the condenser 22 and the expansion valve 24 is too low and is lower than the pressure early warning value, the fan 26 is stopped, and the pressure sensor 25 controls the start and stop of the fan 26, so that the refrigerant enters the heat exchanger assembly 23 in the most suitable state, and a better cooling and dewatering effect is achieved.

The refrigeration system 20 further includes a high-pressure shutdown protector 27, the high-pressure shutdown protector 27 is installed on a pipeline between the condenser 22 and the expansion valve 24, the high-pressure shutdown protector 27 is electrically connected with the controller, when the pressure sensor 25 cannot detect the pressure in the pipeline between the condenser 22 and the expansion valve 24, that is, the pressure sensor 25 is damaged, the pressure cannot be sensed to control the fan 26 to rotate, if the pressure of the refrigerant rises, the high-pressure shutdown protector 27 will be started and send an instruction to the controller, and the freeze dryer will stop in a power-off state.

The refrigeration system 20 further includes a filter drier 28, wherein the filter drier 28 is disposed between the pressure sensor 25 and the expansion valve 24, and the filter drier 28 is used for removing moisture and impurities in the refrigerant, so as to facilitate filtering out clean refrigerant.

With continued reference to fig. 1, 3, 6 and 7, the refrigeration system 20 further includes a pressure gauge 29 penetrating through the casing 10, the pipeline between the heat exchanger assembly 23 and the compressor 21 is communicated with the pressure gauge 29, the pressure gauge 29 is used for measuring the pressure of the refrigerant in the pipeline between the heat exchanger assembly 23 and the compressor 21, the pressure gauge 29 is electrically connected with the controller, and because the pressure and the temperature are in a proportional relationship, the measurement of the pressure gauge 29 is equivalent to measuring the temperature of the refrigerant exiting from the heat exchanger assembly 23, the temperature in the heat exchanger assembly 23 cannot be lower than 0 ℃, the refrigeration system 20 adopts the refrigeration principle commonly used in the market air conditioner and the refrigerator, and the freezing phenomenon of the refrigerant in the first channel 231 is avoided.

Because the refrigerant in the first channel 231 can absorb the heat in the second channel 232, the water needs to be prevented from freezing in the second channel 232 of the heat exchanger assembly 23 to cause the internal blockage of the second channel 232, and meanwhile, the excessive temperature in the second channel 232 is also prevented from influencing the water removal effect, so that the temperature of the refrigerant flowing out of the heat exchanger assembly 23 needs to be controlled, the feedback time of the pressure is far better than that of the temperature sensor, the pressure gauge 29 is arranged at the position, and the temperature of the refrigerant flowing out of the heat exchanger assembly 23 can be controlled more accurately by operating the start and stop of the fan 26.

With continued reference to fig. 1 and 3, the casing 10 has an inclined surface 1231, the inclined surface 1231 of the casing 10 is provided with a first mounting hole 1232 communicating with the accommodating space 11, the pressure gauge 29 is fixed on the first mounting hole 1232, and the visible surface of the pressure gauge 29 is parallel to the inclined surface 1231, so that an operator can intuitively see the value of the pressure gauge 29.

The freeze dryer further comprises a start-stop button 40 and a display button 50, the inclined surface 1231 of the machine shell 10 is further provided with a second installation hole 1233 and a third installation hole 1234 in a penetrating mode, the second installation hole 1233 and the third installation hole 1234 are communicated with the accommodating space 11, the start-stop button 40 and the display button 50 are electrically connected with the controller, the start-stop button 40 is used for controlling the start and stop of the freeze dryer, the display button 50 is used for displaying the running state of the freeze dryer, the start-stop button 40 and the display button 50 are arranged on the inclined surface 1231, and an operator can intuitively see the freeze dryer conveniently to operate the freeze dryer rapidly.

With continued reference to fig. 5 to 7, the refrigeration system 20 further includes a plurality of electronic drain valves 291, and the electronic drain valves 291 are installed on the water outlets of the heat exchanger assembly 23, the steam-water separator 33 and the air filter 34, so that the sewage in the first channel 231, the steam-water separator 33 and the air filter 34 can be timely drained, and the electronic drain valves 291 can reduce the gas loss of the compressed air.

The bottom of the steam-water separator 33, the heat exchanger assembly 23 and each air filter 34 are respectively provided with an electronic drain valve 291 independently, corresponding timing drainage time can be set according to different water removal amounts, the two water removal amounts of the front-end steam-water separator 33 are high, the drainage time interval can be set frequently, the lower the water content is, the larger the interval is, the better the dewatering effect of the electronic drain valve 291 is, and the compressed air loss rate is lower.

The number of the air filters 34 is three, the three air filters 34 are sequentially connected and are arranged close to one end of the second pipe joint 32, three-stage filtering protection is arranged at the rear end of the heat exchanger assembly 23, the three air filters 34 can be identical or different in size, three different levels of air filters 34 are arranged at the rear end of the heat exchanger assembly 23 in the embodiment, preferably, the air filters 34 of the AO level, the AA level and the AX level are selected according to the situation, the air filters 34 of different levels can be selected, and compressed air sequentially passes through the air filters 34 of the AO level, the AA level and the AX level so as to filter impurities with different particle sizes, and finally dry and pure compressed air is obtained.

Referring to fig. 5, 6 and 8, the separation system 30 further includes a connecting pipe 35, two first flange joints 36 and two second flange joints 37, the two first flange joints 36 are respectively installed on the ends of the air filter 34 and the second channel 232, the two second flange joints 37 are respectively installed on two ends of the connecting pipe 35, the two first flange joints 36 are respectively butted with the two second flange joints 37, the second channel 232, the connecting pipe 35 and the air filter 34 are sequentially communicated, and the assembly speed of the freeze dryer can be increased by adopting the first flange joints 36 and the second flange joints 37 to connect between the air filter 34 and the heat exchanger assembly 23, so that the production cost is reduced.

In this embodiment, the installation space of the fourth stage air filter 34 is reserved on the connecting tube 35, specifically, the connecting tube 35 includes a first arc tube 351, a first straight tube 352, a second arc tube 353 and a second straight tube 354 which are sequentially connected, two second flange connectors 37 are detachably installed on the first arc tube 351 and the second straight tube 354, the first straight tube 352 is perpendicular to the second straight tube 354, the first arc tube 351, the first straight tube 352, the second arc tube 353 and the second straight tube 354 are all detachable between adjacent parts, and when in installation, the fourth stage air filter 34 can be installed beside the third stage air filter 34, and the second straight tube 354 is detached, so that the customer with higher cleanliness requirement can be met, and the manufacturing cost and the internal space of the freeze dryer are saved.

In this embodiment, the first pipe joint 31 and the second pipe joint 32 may also be flange joints, so that no pipe connection can be realized, manufacturing cost is saved, the number of air filters 34 is not limited, and more air filters 34 can be additionally added to meet the use requirements of different customers.

With continued reference to fig. 1, 3, 4 and 6, the casing 10 includes a frame 12 and two side baffles 13, the side surfaces of the frame 12 are respectively provided with a through window 121, the side baffles 13 are detachably mounted on the through window 121 through a plurality of door buckles 14, the through window 121 is communicated with the accommodating space 11, the left side and right side baffles 13 are fastened by screws in different conventional manners, the door buckle 14 type design is adopted, and the air filter 34 filter element can be manually opened during debugging, maintenance and maintenance of the inner parts of the freeze dryer without tools such as screwdrivers and wrenches.

The casing 10 further comprises a plurality of transparent plates 15, the side baffle plates 13 are provided with a plurality of observation windows 131 in a penetrating manner, the transparent plates 15 are fixed on the side baffle plates 13 and cover the observation windows 131, the running condition and the drainage condition inside the freeze dryer can be observed through the observation windows 131, and whether the refrigerating system 20 is abnormal or not is observed.

In this embodiment, one of the side baffles 13 is provided with an air inlet 132, the other side baffle 13 is provided with an air outlet 133, the air outlet 133 is arranged corresponding to the fan 26, the air inlet 132 can provide fresh air for the fan 26, and the air outlet 133 is used for discharging air in the casing 10.

The condenser 22 and the compressor 21 are both fixed on the bottom wall of the accommodating space 11, the air filter 34 is located right above the condenser 22, the heat exchanger assembly 23 and the steam-water separator 33 are suspended in the accommodating space 11, and the air filter 34 is arranged opposite to the heat exchanger assembly 23, so that the internal part structure of the freeze dryer is more compact.

The frame 12 includes a base 122, a front baffle 123, a rear baffle 124, and a top plate 125, the front baffle 123 and the rear baffle 124 are disposed opposite to each other, bottoms of the front baffle 123 and the rear baffle 124 are connected to the base 122, tops of the front baffle 123 and the rear baffle 124 are connected to the top plate 125, an inclined surface 1231 is disposed at an end of the front baffle 123 near the top plate 125, first through holes 1241 and second through holes 1242 are disposed in the rear baffle 124, and the condenser 22 and the compressor 21 are fixed to the base 122.

The freeze dryer further comprises a bracket 60 arranged side by side with the condenser 22, the bottom of the bracket 60 is fixed on the bottom wall of the accommodating space 11, the heat exchanger assembly 23 is arranged at the top of the bracket 60, the bracket 60 is of a bent rod structure, the air inlet 132, the fan 26, the condenser 22, the air outlet 133 and the bracket 60 are basically positioned on the same straight line, and the compressor 21 is fixed on the bottom wall of the accommodating space 11 and positioned on one side of the condenser 22.

Principle of operation of freeze dryer:

referring further to fig. 4, 6 and 9, the refrigeration principle of the refrigeration system 20: the inside circulation refrigeration that adopts of freeze drier, refrigerant flows from refrigerating compressor 21, be high temperature high pressure's gaseous state, gaseous refrigerant can dispel the heat when passing through condenser 22, become liquid refrigerant, liquid refrigerant enters into dry filter 28 and carries out removal moisture and impurity, obtain pure liquid refrigerant, afterwards, liquid refrigerant is adjusted the flow size by expansion valve 24 in order to get into heat exchanger assembly 23, liquid refrigerant can absorb heat evaporation in heat exchanger assembly 23's first passageway 231, evaporation needs to absorb a large amount of heat, so just absorb the air heat in second passageway 232, make compressed air cooling dewatering, the refrigerant that heat exchanger assembly 23 comes out is gaseous, gaseous refrigerant enters into compressor 21 at last, the circulation repeatedly, the direction that the solid arrow indicates in fig. 9 is the refrigerant flow direction.

Compressed air drying and dewatering principle: the wet and hot compressed air enters the steam-water separator 33 from the first pipe joint 31, a large amount of liquid water in the compressed air is removed in the steam-water separator 33, the water content is reduced, the compressed air enters the second channel 232 of the heat exchanger assembly 23, a large amount of heat is absorbed by the refrigerant in the refrigerating system 20 through the heat exchanger assembly 23, the compressed air in the second channel 232 is cooled, the water content in the cooled compressed air is separated out, the lower the temperature is, the lower the water content of the compressed air is, the liquid water is separated out, the liquid water is discharged from the water outlet of the heat exchanger assembly 23, the compressed air enters the air filter 34 to discharge impurities and water in the compressed air again, and finally the dried compressed air flows out from the second pipe joint 32 for external air using equipment, and the direction indicated by a dotted arrow in fig. 9 is the flowing direction of the compressed air.

The dry compressed air is widely applied in production and manufacture, particularly high-end equipment, the moisture content of the compressed air is extremely high, and the water content of the compressed air manufactured by an air compressor is extremely high, so that the post-treatment is carried out by using the freeze dryer for water removal.

The freeze dryer provided by the utility model has the following advantages:

1. the steam-water separator 33 and the air filter 34 are positioned in the shell 10, so that an integrated design is realized, when the freeze dryer is installed, no pipelines are required to be independently installed for the steam-water separator 33 and the air filter 34, the occupied space of the equipment is small, the installation space and the installation cost are saved, and the compressed air can be effectively filtered and dried;

2. a pressure sensor 25 is arranged on a pipeline between the condenser 22 and the expansion valve 24, the start and stop of a fan 26 are indirectly controlled through data acquired by the pressure sensor 25, and the fan 26 is arranged towards the condenser 22 and used for radiating heat of the condenser 22 so that the temperature of a refrigerant coming out of the condenser 22 is always in a certain range;

3. a pressure gauge 29 is arranged on a pipeline between the heat exchanger assembly 23 and the compressor 21, the temperature of the refrigerant discharged from the heat exchanger assembly 23 is controlled more accurately through data acquired by the pressure gauge 29, the phenomenon of icing and blocking inside the heat exchanger assembly 23 is avoided, and if the blockage exists, the pressure of the pressure sensor 25 and the flow of the expansion valve 24 can be regulated by adjusting the pressure early warning value;

4. the air inlet end of the heat exchanger assembly 23 is provided with a steam-water separator 33, a large amount of liquid water in the compressed air is removed, the water content is reduced, and then the compressed air enters the heat exchanger assembly 23, so that the total treatment load of the heat exchanger assembly 23 is reduced, and the treatment efficiency is greatly improved;

5. the side baffle 13 adopts a door catch 14 type design, and an observation window 131 is arranged on the side baffle 13, so that the door catch 14 can be manually opened when the inside of the dryer is maintained, tools such as a screwdriver spanner are not needed, and later maintenance and the like are more convenient;

6. the exhaust end of the heat exchanger assembly 23 adopts three-stage filtration, namely an AO stage, an AA stage and an AX stage, and air filters 34 with different stages can be selected according to conditions, and meanwhile, the installation space of a fourth stage air filter 34 is reserved so as to meet the use of customers with higher cleanliness requirements;

7. the heat exchanger assembly 23, the steam-water separator 33 and the air filter 34 adopt independent timing drainage and do not interfere with each other, so that the loss of compressed air can be reduced;

8. the refrigerant that condenser 22 comes out and the refrigerant that heat exchanger assembly 23 comes out all adopt pressure control, and pressure control makes refrigeration effect better, and the dewatering effect is better.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims (10)

1. A freeze dryer, comprising:

a housing having an accommodation space;

the refrigerating system is positioned in the accommodating space and comprises a compressor and a first channel communicated with the compressor, and the compressor can input a refrigerant into the first channel;

the separation system comprises a first pipe joint, a second pipe joint, a steam-water separator, a second channel and at least one air filter, wherein the steam-water separator, the second channel and the at least one air filter are arranged in the accommodating space, one end of the steam-water separator is installed in the first pipe joint, the first pipe joint penetrates through the shell and is used for being connected with an external air compressor, one end of the air filter is installed in the second pipe joint, the second pipe joint penetrates through the shell, the other ends of the steam-water separator and the air filter are respectively communicated with two ends of the second channel, compressed air can be input into the second channel by the air compressor, the first channel is close to the second channel, and a refrigerant in the first channel can be in heat exchange with the compressed air in the second channel.

2. The freeze dryer of claim 1 wherein the refrigeration system further comprises a condenser and heat exchanger assembly connected end to end, the heat exchanger assembly having the first passage and the second passage spaced from the first passage, one end of the first passage being in communication with the condenser and the other end being in communication with the compressor.

3. The freeze dryer of claim 2 further comprising a controller, wherein the refrigeration system further comprises a pressure sensor and a fan for dissipating heat from the condenser, wherein the pressure sensor is mounted on a conduit between the condenser and the heat exchanger assembly, and wherein the compressor, the fan and the pressure sensor are electrically connected to the controller.

4. The freeze dryer of claim 2 wherein the refrigeration system further comprises a pressure gauge disposed through the housing, a conduit between the heat exchanger assembly and the compressor being in communication with the pressure gauge.

5. The freeze dryer of claim 4 wherein the housing has an inclined surface, the visible surface of the pressure gauge being disposed parallel to the inclined surface; and/or the number of the groups of groups,

the refrigerating system further comprises a plurality of electronic drain valves, and the electronic drain valves are arranged on water outlets of the heat exchanger assembly, the steam-water separator and the air filter.

6. The freeze dryer of claim 1, wherein the housing includes a frame, two side guards and a plurality of transparent plates, the side guards are detachably mounted on the frame through a plurality of door buckles, the side guards and the frame enclose the accommodating space, the side guards are provided with a plurality of observation windows in a penetrating manner, and the transparent plates are fixed on the side guards and cover the observation windows.

7. The freeze dryer of claim 1 wherein the number of air filters is three, and three air filters are connected in sequence and positioned adjacent one end of the second tube fitting.

8. The freeze dryer of claim 2 wherein the condenser and compressor are both secured to the bottom wall of the receiving space, the air filter is positioned directly above the condenser, the heat exchanger assembly and the vapor-water separator are suspended within the receiving space, and the air filter is disposed opposite the heat exchanger assembly.

9. The freeze dryer of claim 2 further comprising a bracket disposed side-by-side with the condenser, the bottom of the bracket being secured to the bottom wall of the receiving space, the heat exchanger assembly being mounted to the top of the bracket, the compressor being secured to the bottom wall of the receiving space and being located on one side of the condenser.

10. The freeze dryer of claim 2 wherein the separation system further comprises a connector tube, two first flange connectors and two second flange connectors, the two first flange connectors being mounted on ends of the air filter and the second channel, respectively, the two second flange connectors being mounted on ends of the connector tube, respectively, the two first flange connectors being in butt joint with the two second flange connectors, respectively, the second channel, connector tube and air filter being in communication in sequence.

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