Low temperature freeze drying system

Abstract

The application relates to a low-temperature freeze-drying system which comprises a material chamber, a freezing assembly and a cooling assembly, the material chamber is provided with a plurality of trays, the freezing assembly comprises a plurality of freezing pipes and a vacuum pump, the freezing pipes are in one-to-one correspondence with the trays, and a suction pipe is connected between the plurality of freezing pipes and the vacuum pump. In the application, the freezing pipes and the vacuum pump are arranged, the water in the freezing pipes is recycled, the user does not need to supply water to the low-temperature freeze-drying system all the time, material waste is reduced, the energy-saving concept is embodied, the use cost of the low-temperature freeze-drying system for the user is reduced, the drying assembly is arranged, ice in the material absorbs heat to sublimate to form water vapor, the material is dried, and the storage time of the material is prolonged, the water storage tank is arranged, the vacuum pump is cooled, the vacuum pump is not prone to damage caused by long-time operation in a high-temperature state, and the service life of the vacuum pump is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of refrigeration equipment, in particular to a low-temperature freeze-drying system. BACKGROUND

[0002] Freeze-drying, also known as sublimation drying, is a drying method for freezing water-containing materials below the freezing point to convert water into ice, and then removing ice by converting it into steam under a higher vacuum state. The materials can be first frozen in a freezing device and then dried, but they can also be directly frozen in a drying chamber by rapidly evacuating the vacuum.

[0003] The method of freezing the materials mainly exchanges heat between Freon or liquid nitrogen and air as a refrigerant. After the Freon or liquid nitrogen absorbs heat and vaporizes, it is discharged from the outlet of the freezing device, thereby achieving freezing of the materials in the drying chamber.

[0004] When a user uses a freeze-drying device to freeze and dry the materials, the user needs to continuously supply refrigerant to the freeze-drying device, which increases the user's use cost of the freeze-drying system, and the discharged Freon gas reacts with ozone in the ozone layer, causing environmental damage. SUMMARY

[0005] In order to reduce the user's use cost of the freeze-drying device, the present application provides a low-temperature freeze-drying system.

[0006] The low-temperature freeze-drying system provided by the present application adopts the following technical scheme:

[0007] A low-temperature freeze-drying system, comprising a material chamber, a freezing assembly, and a cooling assembly, the material chamber has a plurality of trays, the trays are used for storing materials, the freezing assembly comprises a plurality of freezing pipes and a vacuum pump, the plurality of freezing pipes are sequentially and spacedly connected in the inner cavity of the material chamber, and the freezing pipes correspond to the trays one by one; an air extraction pipe is connected between the plurality of freezing pipes and the vacuum pump, the air extraction pipe has an air inlet end and an air outlet end, the air inlet end is in communication with the air outlet ends of the plurality of freezing pipes, and the air outlet end is in communication with the air inlet end of the vacuum pump; the freezing pipes are used for storing water, when the vacuum pump operates, the air in the freezing pipes enters the vacuum pump through the air extraction pipe, the water vapor pressure in the inner cavities of the freezing pipes is reduced, the water in the freezing pipes is driven to absorb heat and vaporize, and the cooling assembly is used for heat release and liquefaction of the water vapor discharged by the vacuum pump and backflow to the inner cavities of the freezing pipes.

[0008] By adopting the above technical scheme, the user stores the material on the plurality of trays to realize the storage of the material in the material chamber; the vacuum pump starts to operate and drives the air in the refrigeration pipeline to enter the vacuum pump through the air suction pipeline, the water vapor pressure in the refrigeration pipeline is reduced, and the water in the refrigeration pipeline and the air in the material chamber cavity are driven to exchange heat, the water in the refrigeration pipeline absorbs heat and vaporizes, the air in the material chamber cavity releases heat and cools down, and the material in the material chamber is cooled and frozen; at the same time, the cooling assembly drives the water vapor discharged from the vacuum pump to liquefy and flow back to the refrigeration pipeline cavity, realizes the recycling of the water in the refrigeration pipeline, and does not need the user to supply water to the low-temperature refrigeration and drying system all the time, thereby reducing the waste of materials, embodying the concept of energy saving, and reducing the use cost of the low-temperature refrigeration and drying system for the user.

[0009] Optionally, the cooling assembly comprises an air inlet pipeline, a cooler and a liquid inlet pipeline, the cooler is used for water vapor to release heat and liquefy to form liquid water, one end of the air inlet pipeline is communicated with the air outlet end of the vacuum pump, the other end of the air inlet pipeline is communicated with the air inlet of the cooler, one end of the liquid inlet pipeline is communicated with the water outlet end of the cooler, and the other end of the liquid inlet pipeline is communicated with the water inlet ends of the plurality of refrigeration pipelines, when the water vapor in the vacuum pump enters the cooler through the air inlet pipeline, the cooler drives the water vapor to liquefy to form liquid water, and the liquid water enters the refrigeration pipeline cavity through the liquid inlet pipeline.

[0010] By adopting the above technical scheme, the water vapor discharged from the vacuum pump enters the cooler through the liquid inlet pipeline, the cooler drives the water vapor to release heat and liquefy to form condensed water, the condensed water after cooling enters the refrigeration pipeline cavity through the liquid inlet pipeline, the water in the refrigeration pipeline is recycled, and the user does not need to supply water when using the low-temperature refrigeration and drying system, thereby reducing the use cost of the low-temperature refrigeration and drying system.

[0011] Optionally, it further comprises a drying assembly, the drying assembly is used for discharging the air in the material chamber cavity; the refrigeration assembly first cools and freezes the material in the material chamber, and then the drying assembly discharges the air in the material chamber, the water vapor pressure in the material chamber cavity is reduced, and the ice in the material absorbs heat and sublimates to form water vapor.

[0012] By adopting the above technical scheme, the refrigeration assembly first operates to cool and freeze the material in the material chamber, the drying assembly then operates to discharge the air in the material chamber cavity, the water vapor pressure in the material chamber cavity is reduced, the ice in the material exchanges heat with the water in the refrigeration pipeline, the ice in the material absorbs heat and sublimates to form water vapor, and the material is dried, thereby prolonging the storage time of the material.

[0013] Optionally, the vacuum pump is connected with a water storage tank, and the water storage tank cavity is used for storing water; when the vacuum pump operates and heats up, the water in the water storage tank exchanges heat with the vacuum pump to realize the cooling of the vacuum pump.

[0014] By adopting the above technical solution, when the vacuum pump is running and heating up, the water storage tank is connected to the vacuum pump. There is a temperature difference between the water in the water storage tank and the vacuum pump, which drives the vacuum pump to transfer most of its internal heat to the water in the water storage tank, thereby cooling the vacuum pump. This prevents the vacuum pump from being damaged due to prolonged operation at high temperatures, thus improving the service life of the vacuum pump.

[0015] Optionally, a cooling pipe is connected between the water storage tank and the air extraction pipe, and a heating pipe is connected between the water storage tank and the liquid inlet pipe. A driving component is connected to the heating pipe, which drives the hot water in the water storage tank to pass through the heating pipe and the liquid inlet pipe in sequence and enter the freezing pipe. The hot water in the freezing pipe exchanges heat with the material to achieve cooling of the hot water in the freezing pipe. The cold water in the freezing pipe passes through the air extraction pipe and the cooling pipe in sequence and enters the inner cavity of the water storage tank.

[0016] By adopting the above technical solution, when the refrigeration component drives the material in the material chamber to cool down and freeze, the vacuum pump operates to transfer most of its internal heat to the water in the storage tank, thus achieving cooling by the vacuum pump. The drive unit drives the hot water in the storage tank to pass through the heating pipe and the liquid inlet pipe in sequence and enter the refrigeration pipe. The material temperature is lower than the temperature of the hot water in the refrigeration pipe, and the hot water in the refrigeration pipe transfers most of its internal heat to the material. The ice in the material absorbs heat and vaporizes, thus drying the material and increasing its storage time. The cooled water in the refrigeration pipe passes through the air extraction pipe and the cooling pipe in sequence and enters the inner cavity of the storage tank, thus achieving circulating cooling of the water in the storage tank. This eliminates the need for users to change the water in the storage tank regularly, reducing material waste and embodying the concept of energy saving.

[0017] Optionally, the drying assembly includes an air outlet pipe, an exhaust pipe, an air shut-off valve, and an on / off valve. One end of the air outlet pipe is connected to the material chamber cavity, and the other end is connected to the extraction pipe. One end of the exhaust pipe is connected to the air inlet pipe, and the other end is connected to the outside atmosphere. The on / off valve is connected to the air inlet pipe and is used to control the connection and disconnection between the air inlet pipe and the cooler air inlet. The air shut-off valve is connected to the extraction pipe and is used to control the connection and disconnection between the freezing pipe and the extraction pipe. When the drying assembly is working, the on / off valve separates the cooler air inlet and the air inlet pipe, the air shut-off valve separates the freezing pipe and the extraction pipe, and the vacuum pump drives the air in the material chamber cavity to pass through the air outlet pipe and the extraction pipe in sequence and enter the vacuum pump cavity. The air in the vacuum pump cavity passes through the air inlet pipe and the exhaust pipe in sequence and is discharged to the outside atmosphere.

[0018] By adopting the technical scheme, the material in the material chamber is cooled and frozen first by the freezing assembly, then the drying assembly is operated, the air in the material chamber is driven by the vacuum pump to pass through the air outlet pipeline, the air exhaust pipeline and the inner cavity of the vacuum pump in sequence, the on-off valve separates the air inlet of the cooler and the air inlet pipeline, the air in the vacuum pump passes through the air inlet pipeline, the air exhaust pipeline and is discharged to the outside atmosphere in sequence, the water vapor pressure in the material chamber is reduced, the ice in the material is driven to exchange heat with the hot water in the freezing pipeline, the ice in the material absorbs heat and sublimates to form water vapor, so that the drying of the material is realized, and the storage time of the material is prolonged.

[0019] Optionally, the air exhaust pipeline is connected with an air exhaust valve, the air exhaust valve is used for controlling the opening and closing of the air exhaust pipeline and the outside atmosphere; the air outlet pipeline is connected with an air outlet valve, and the air outlet valve is used for controlling the opening and closing of the air outlet pipeline and the inner cavity of the material chamber.

[0020] By adopting the technical scheme, when the freezing assembly is operated, the air in the freezing pipeline is driven by the vacuum pump to enter the inner cavity of the vacuum pump through the air exhaust pipeline, and the air exhaust valve separates the air outlet pipeline and the inner cavity of the material chamber, the air in the vacuum pump stably passes through the air inlet pipeline and enters the inner cavity of the cooler, and the on-off valve connects the air inlet of the cooler and the air inlet pipeline, so that the freezing assembly is stably operated.

[0021] Optionally, the cooling pipeline is connected with a cooling valve, and the cooling valve is used for controlling the opening and closing of the cooling pipeline and the air exhaust pipeline; the heating pipeline is connected with a heating valve, and the heating valve is used for controlling the opening and closing of the heating pipeline and the liquid inlet pipeline.

[0022] By adopting the technical scheme, when the vacuum pump is operated, the cooling valve separates the air exhaust pipeline and the cooling pipeline, so that the air in the freezing pipeline stably enters the inner cavity of the vacuum pump from the air exhaust pipeline; the air in the vacuum pump passes through the air inlet pipeline and enters the inner cavity of the cooler, the cooler drives the water vapor to release heat and liquefy to form condensed water, the heating valve separates the heating pipeline and the liquid inlet pipeline, so that the condensed water after cooling stably passes through the liquid inlet pipeline and enters the freezing pipeline, and the freezing assembly is stably operated.

[0023] Optionally, the heating pipeline and the cooling pipeline are connected with a circulation pipeline, when the cooling valve separates the cooling pipeline and the air exhaust pipeline, and the heating valve separates the heating pipeline and the liquid inlet pipeline, the driving member drives the water in the water storage tank to pass through the heating pipeline, the circulation pipeline and the cooling pipeline in sequence and enter the inner cavity of the water storage tank.

[0024] By adopting the technical scheme, when the refrigeration assembly is running, the heating valve separates the heating pipeline and the liquid inlet pipeline, the cooling valve separates the cooling pipeline and the exhaust pipeline, the internal energy generated by the operation of the vacuum pump is transferred to the water in the water storage tank, the water in the water storage tank passes through the heating pipeline, the circulating pipeline and the cooling pipeline and enters the inner cavity of the water storage tank, the contact area between the water in the water storage tank and the air outside is increased, the cooling efficiency of the water in the water storage tank is improved, and the self-circulating cooling of the water in the water storage tank is realized; the water in the water storage tank is not easy to enter the refrigeration pipeline to affect the operation of the refrigeration assembly, the vacuum pump is not easy to run in a high-temperature state to be damaged, and therefore the service life of the vacuum pump is improved.

[0025] Optionally, the circulating pipeline is connected with a circulating valve, and the circulating valve is used for controlling the on-off of the heating pipeline and the circulating pipeline.

[0026] By adopting the technical scheme, when the drying assembly is running, the circulating pump separates the heating pipeline and the circulating pipeline, the heating valve connects the liquid inlet pipeline and the heating pipeline, and the driving member drives the water in the water storage tank to pass through the heating pipeline, the liquid inlet pipeline and the refrigeration pipeline in sequence, so that the hot water in the water storage tank is stably delivered to the refrigeration pipeline, and the drying of the material is ensured.

[0027] To sum up, the present application has at least one of the following beneficial technical effects:

[0028] 1. The refrigeration pipeline and the vacuum pump are arranged, the water in the refrigeration pipeline is used in a circulating manner, the user does not need to supply water to the low-temperature refrigeration and drying system at all times, material waste is reduced, the concept of energy saving is embodied, and the use cost of the low-temperature refrigeration and drying system for the user is reduced;

[0029] 2. The drying assembly is arranged, ice in the material absorbs heat to sublimate to form water vapor, the drying of the material is realized, and the storage time of the material is prolonged;

[0030] 3. The water storage tank is arranged, the cooling of the vacuum pump is realized, the vacuum pump is not easy to run in a high-temperature state for a long time to be damaged, and the service life of the vacuum pump is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic diagram of the overall structure of the embodiment 1 of the present application.

[0032] Figure 2 is a schematic diagram of the overall structure of the embodiment 1 of the present application.

[0033] Figure 3 is a schematic diagram of the local structure of the embodiment 1 of the present application, mainly showing the refrigeration pipeline.

[0034] Figure 4 is a schematic diagram of the overall structure of the embodiment 1 of the present application.

[0035] Figure 5 is a partial sectional view of the locking assembly of the embodiment 2 of the present application.

[0036] Reference signs: 1, material chamber; 2, freezing assembly; 21, freezing pipeline; 211, freezing section; 2111, freezing part one; 2112, freezing part two; 2113, freezing part three; 2114, freezing part four; 22, vacuum pump; 3, drying assembly; 31, air outlet pipeline; 32, air exhaust pipeline; 33, air cut-off valve; 34, on-off valve; 4, tray; 41, chute; 42, locking groove; 5, air extraction pipeline; 6, cooling assembly; 61, air inlet pipeline; 62, cooler; 63, liquid inlet pipeline; 7, liquid inlet valve; 8, air outlet valve; 9, air exhaust valve; 10, water storage tank; 11, cooling pipeline; 12, cooling valve; 13, heating pipeline; 14, driving member; 15, circulating pipeline; 16, circulating valve; 17, locking assembly; 171, locking plate; 172, thermal expansion and contraction block; 18, heating valve. DETAILED DESCRIPTION

[0037] The following will be described in detail with reference to the accompanying drawings. Figures 1-5 The present application will be further described in detail.

[0038] The embodiment of the present application discloses a low-temperature freeze-drying system.

[0039] Embodiment 1

[0040] With reference to Figure 1 , the low-temperature freeze-drying system comprises a material chamber 1, a freezing assembly 2 and a drying assembly 3, and the freezing assembly 2 and the drying assembly 3 are connected to the material chamber 1. The material chamber 1 is used for storing materials, the freezing assembly 2 is used for cooling and freezing the materials in the material chamber 1, and the drying assembly 3 is used for exhausting air in the cavity of the material chamber 1, so as to realize freeze-drying of the materials in the material chamber 1.

[0041] With reference to Figure 1 and Figure 2 , the cavity of the material chamber 1 is connected with multiple trays 4 in sequence and uniformly, and the trays 4 are used for storing materials. The freezing assembly 2 comprises multiple freezing pipelines 21 and a vacuum pump 22, the freezing pipelines 21 correspond to the trays 4 one by one, the cavities of the freezing pipelines 21 are used for storing water, and the outer walls of the freezing pipelines 21 are fixed to the bottoms of the trays 4.

[0042] With reference to Figure 2 and Figure 3The refrigeration pipeline 21 comprises a plurality of refrigeration sections 211 which are sequentially connected in series. The refrigeration section 211 comprises a refrigeration section one 2111, a refrigeration section two 2112, a refrigeration section three 2113 and a refrigeration section four 2114, which increase the contact area between the refrigeration pipeline 21 and the tray 4 and improve the cooling efficiency of the refrigeration assembly 2 on the material in the tray 4. The refrigeration section one 2111, the refrigeration section two 2112, the refrigeration section three 2113 and the refrigeration section four 2114 are sequentially connected at the ends. The axis of the refrigeration section one 2111 is parallel to the axis of the refrigeration section three 2113, the axis of the refrigeration section two 2112 is parallel to the axis of the refrigeration section four 2114, the axis of the refrigeration section two 2112 is perpendicular to the axis of the refrigeration section one 2111, and the end of the refrigeration section one 2111 away from the refrigeration section two 2112 is connected to the end of the refrigeration section four 2114 away from the refrigeration section three 2113. The vacuum pump 22 is connected to the refrigeration pipeline 21 through an air extraction pipeline 5. One end of the air extraction pipeline 5 is fixed to the air inlet end of the vacuum pump 22 through a flange, and the other end of the air extraction pipeline 5 is connected to the air outlet ends of the plurality of refrigeration pipelines 21.

[0043] Referring to Figure 2 and Figure 3 When the refrigeration assembly 2 is running, the vacuum pump 22 drives the air in the refrigeration pipeline 21 to enter the inner cavity of the vacuum pump 22 through the air extraction pipeline 5, the water vapor pressure in the refrigeration pipeline 21 is reduced, the water in the refrigeration pipeline 21 is driven to exchange heat with the air in the material chamber 1, the water in the refrigeration pipeline 21 absorbs heat and vaporizes to form water vapor, the air in the material chamber 1 releases heat and cools down, and the vacuum pump 22 continuously drives the water vapor in the refrigeration pipeline 21 to enter the inner cavity of the vacuum pump 22 from the air extraction pipeline 5, thereby achieving the cooling of the material on the tray 4.

[0044] Referring to Figure 1 and Figure 3 The material chamber 1 is connected to a cooling assembly 6. The cooling assembly 6 comprises an air inlet pipeline 61, a cooler 62 and a liquid inlet pipeline 63. The cooler 62 is used for water vapor to release heat and liquefy to form liquid water, thereby achieving the cooling of water. One end of the air inlet pipeline 61 is fixed to the air outlet end of the vacuum pump 22 through a flange, and the other end of the air inlet pipeline 61 is fixed to the air inlet of the cooler 62 through a flange.

[0045] Referring to Figure 1 and Figure 3 One end of the liquid inlet pipeline 63 is fixed to the water outlet end of the cooler 62 through a flange, and the other end of the liquid inlet pipeline 63 is directly connected to the water inlet ends of the plurality of refrigeration pipelines 21. The liquid inlet pipeline 63 and the air extraction pipeline 5 are located at the two ends of the refrigeration pipeline 21. The liquid inlet pipeline 63 is connected to a liquid inlet valve 7, which is used to control the opening and closing of the refrigeration pipeline 21 and the liquid inlet pipeline 63.

[0046] Referring to Figure 1 and Figure 3When the cooling assembly 6 is running, the liquid inlet valve 7 connects the refrigeration pipeline 21 and the liquid inlet pipeline 63, the water vapor in the vacuum pump 22 enters the inner cavity of the cooler 62 through the air inlet pipeline 61, the cooler 62 drives the water vapor to release heat and lower temperature and liquefy to form condensed water, the condensed water in the cooler 62 enters the refrigeration pipeline 21 through the liquid inlet pipeline 63, realizing the recycling of the water in the refrigeration pipeline 21, without the user's need to inject water into the refrigeration pipeline 21 at regular time, reducing the waste of water resources, and embodying the concept of energy saving.

[0047] With reference to Figure 1 and Figure 4 , the drying assembly 3 comprises an air outlet pipeline 31, an air exhaust pipeline 32, a cut-off valve 33 and an on-off valve 34, one end of the air outlet pipeline 31 is fixed to the outer wall of the material chamber 1 through a flange, and the inner cavity of the air outlet pipeline 31 is communicated with the inner cavity of the material chamber 1. An air outlet valve 8 is connected to the air outlet pipeline 31, and the air outlet valve 8 is used to control the opening and closing of the air outlet pipeline 31 and the inner cavity of the material chamber 1.

[0048] With reference to Figure 1 , one end of the air exhaust pipeline 32 is fixed to the end of the air inlet pipeline 61 through a flange, and the other end of the air exhaust pipeline 32 is communicated with the outside atmosphere. An air exhaust valve 9 is connected to the air exhaust pipeline 32, and the air exhaust valve 9 is used to control the opening and closing of the air exhaust pipeline 32 and the outside atmosphere.

[0049] With reference to Figure 1 and Figure 3 , the cut-off valve 33 is connected to the air suction pipeline 5, and the cut-off valve 33 is used to control the opening and closing of the refrigeration pipeline 21 and the air suction pipeline 5. The on-off valve 34 is connected to the air inlet pipeline 61, and the on-off valve 34 is used to control the opening and closing of the air inlet pipeline 61 and the air inlet of the cooler 62.

[0050] With reference to Figure 1 , when the drying assembly 3 is running, the cut-off valve 33 separates the refrigeration pipeline 21 and the air suction pipeline 5, and the on-off valve 34 separates the air inlet pipeline 61 and the air inlet of the cooler 62, the air in the material chamber 1 is driven by the vacuum pump 22 to pass through the air outlet pipeline 31, the air suction pipeline 5 and enter the inner cavity of the vacuum pump 22, the air in the inner cavity of the material chamber 1 is driven by the vacuum pump 22 to pass through the air inlet pipeline 61, the air exhaust pipeline 32 and be exhausted to the outside atmosphere in sequence, realizing the pressure reduction in the material chamber 1; at the same time, the water vapor pressure in the material chamber 1 is reduced, the ice in the material absorbs heat to sublimate to form water vapor, realizing the drying of the material.

[0051] With reference to Figure 4 , the vacuum pump 22 is fixed with a water storage tank 10 through screws, and the water storage tank 10 is close to the heating system of the vacuum pump 22. When the vacuum pump 22 generates a large amount of internal energy, the vacuum pump 22 transfers most of the internal energy to the water in the water storage tank 10, realizing the cooling of the vacuum pump 22, so that the vacuum pump 22 is not easy to be damaged by running in a high temperature state for a long time, thereby improving the service life of the vacuum pump 22.

[0052] With reference to Figure 4 The cooling pipeline 11 is connected between the water storage tank 10 and the air extraction pipeline 5, one end of the cooling pipeline 11 is fixed with the water inlet of the water storage tank 10 through a flange, and the other end of the cooling pipeline 11 is fixed with the air extraction pipeline 5 through a flange. The cooling valve 12 is connected on the cooling pipeline 11, and the cooling valve 12 is used to control the opening and closing of the cooling pipeline 11 and the air extraction pipeline 5.

[0053] With reference to Figure 1 and Figure 3 The heating pipeline 13 is connected between the water storage tank 10 and the liquid inlet pipeline 63, one end of the heating pipeline 13 is fixed with the water outlet of the water storage tank 10 through a flange, and the other end of the heating pipeline 13 is fixed with the liquid inlet pipeline 63 through a flange. The heating valve 18 is connected on the heating pipeline 13, and the heating valve 18 is used to control the opening and closing of the heating pipeline 13 and the liquid inlet pipeline 63.

[0054] With reference to Figure 1 and Figure 3 The driving member 14 is connected on the heating pipeline 13, and the driving member 14 is a circulating pump. The driving member 14 drives the water in the inner cavity of the water storage tank 10 to pass through the heating pipeline 13, the liquid inlet pipeline 63 and the refrigeration pipeline 21 in sequence. The hot water in the refrigeration pipeline 21 exchanges heat with the material on the material tray 4. The ice in the material in the material tray 4 sublimates to form water vapor by absorbing heat, and the hot water in the refrigeration pipeline 21 releases heat to reduce the temperature, so as to realize the temperature reduction of the hot water in the refrigeration pipeline 21. The water in the refrigeration pipeline 21 after temperature reduction passes through the air extraction pipeline 5, the cooling pipeline 11 and enters the water storage tank 10, so as to realize the recycling of the water in the water storage tank 10.

[0055] With reference to Figure 1 The circulating pipeline 15 is connected between the heating pipeline 13 and the cooling pipeline 11, one end of the circulating pipeline 15 is fixed with the heating pipeline 13 through a flange, and the other end of the circulating pipeline 15 is fixed with the cooling pipeline 11 through a flange. The circulating valve 16 is connected on the circulating pipeline 15, and the circulating valve 16 is used to control the opening and closing of the heating pipeline 13 and the circulating pipeline 15.

[0056] With reference to Figure 1 When the refrigeration assembly 2 is running, the heating valve 18 separates the heating pipeline 13 and the liquid inlet pipeline 63, the cooling valve 12 separates the cooling pipeline 11 and the air extraction pipeline 5, the circulating pump connects the heating pipeline 13 and the circulating pipeline 15, and the driving member 14 drives the water in the water storage tank 10 to pass through the heating pipeline 13, the circulating pipeline 15 and the cooling pipeline 11 and enter the water storage tank 10, so as to increase the heat dissipation area of the hot water in the water storage tank 10, realize the self-circulating temperature reduction of the hot water in the water storage tank 10, and prevent the hot water in the water storage tank 10 from entering the refrigeration pipeline 21 when the refrigeration assembly 2 is running, so as to ensure the stable temperature reduction and refrigeration of the material chamber 1 by the refrigeration assembly 2.

[0057] The implementation principle of the low-temperature freeze-drying system of the embodiment 1 of the application is as follows: the staff places the materials on the tray 4 in sequence, the freezing assembly 2 and the cooling assembly 6 are operated simultaneously, the air cut-off valve 33, the on-off valve 34 and the liquid inlet valve 7 are opened, the communication of the freezing pipeline 21, the air extraction pipeline 5, the air inlet pipeline 61 and the liquid inlet pipeline 63 is realized, the air in the freezing pipeline 21 is driven by the vacuum pump 22 to enter the inner cavity of the vacuum pump 22 through the air extraction pipeline 5, the water vapor pressure in the freezing pipeline 21 is reduced, the water in the freezing pipeline 21 is driven to exchange heat with the air in the material chamber 1, the water in the freezing pipeline 21 absorbs heat to vaporize to form water vapor, the air in the material chamber 1 releases heat to lower the temperature, the water vapor in the freezing pipeline 21 is continuously driven by the vacuum pump 22 to enter the inner cavity of the vacuum pump 22 from the air extraction pipeline 5, so that the materials on the tray 4 are cooled and frozen; at the same time, the water vapor discharged from the inner cavity of the vacuum pump 22 enters the inner cavity of the cooler 62 through the air inlet pipeline 61, the cooler 62 drives the water vapor to release heat and lower the temperature to be liquefied to form condensed water, the condensed water in the cooler 62 enters the freezing pipeline 21 through the liquid inlet pipeline 63, so that the water in the freezing pipeline 21 is recycled, the user does not need to inject water into the freezing pipeline 21 at regular time, the waste of water resources is reduced, the concept of energy saving is embodied, and the use cost of the low-temperature freeze-drying system is reduced.

[0058] At the same time, the circulating pump is opened, the communication of the heating pipeline 13, the circulating pipeline 15 and the cooling pipeline 11 is realized, the driving member 14 drives the water in the water storage tank 10 to stably pass through the heating pipeline 13, the circulating pipeline 15, the cooling pipeline 11 and enter the water storage tank 10, the heat dissipation area of the hot water in the water storage tank 10 is increased, the self-circulation cooling of the hot water in the water storage tank 10 is realized, the vacuum pump 22 is not easy to be damaged by long-time operation in a high-temperature state, and the service life of the low-temperature freeze-drying system is improved.

[0059] When the materials on the tray 4 in the material chamber 1 are cooled and frozen, the freezing assembly 2 and the cooling assembly 6 are closed, the drying assembly 3 is operated, the air outlet valve 8, the exhaust valve 9, the cooling valve 12, the heating valve 18 and the liquid inlet valve 7 are opened, the communication of the inner cavity of the material chamber 1, the air outlet pipeline 31 and the exhaust pipeline 32 is realized, and the communication of the freezing pipeline 21, the liquid inlet pipeline 63, the heating pipeline 13, the cooling pipeline 11 and the air extraction pipeline 5 is realized, the air in the material chamber 1 is driven by the vacuum pump 22 to pass through the air outlet pipeline 31 and the air extraction pipeline 5 and enter the inner cavity of the vacuum pump 22, the air in the inner cavity of the material chamber 1 is driven by the vacuum pump 22 to pass through the air inlet pipeline 61 and the exhaust pipeline 32 in sequence and be exhausted to the outside atmosphere, so that the pressure in the material chamber 1 is reduced; at the same time, the water vapor pressure in the material chamber 1 is reduced, the ice in the materials is driven to sublimate to form water vapor by absorbing heat, and the materials are dried.

[0060] The simultaneous driving member 14 drives the hot water in the inner cavity of the water storage tank 10 to pass through the heating pipeline 13, the liquid inlet pipeline 63 and enter the refrigeration pipeline 21 in turn. The hot water in the refrigeration pipeline 21 exchanges heat with the material on the material tray 4. The ice in the material tray 4 absorbs heat and sublimates to form water vapor, and the hot water in the refrigeration pipeline 21 releases heat and cools down, so that the hot water in the refrigeration pipeline 21 is cooled down. The cooled water in the refrigeration pipeline 21 passes through the air extraction pipeline 5, the cooling pipeline 11 and enters the water storage tank 10 in turn, so that the water in the water storage tank 10 is recycled.

[0061] Embodiment 2

[0062] With reference to Figure 3 and Figure 5 Embodiment 2 and Embodiment 1 differ in that a chute 41 is formed in the bottom of the material tray 4, and the chute 41 is used to embed the refrigeration pipeline 21. When the refrigeration pipeline 21 is embedded in the chute 41, the material tray 4 slides along the refrigeration part two 2112 axis to embed in the direction close to the liquid inlet pipeline 63, so as to realize the preliminary fixation of the material tray 4 and the refrigeration pipeline 21.

[0063] With reference to Figure 3 and Figure 5 A plurality of locking grooves 42 are formed on the inner wall of the chute 411, and the locking grooves 42 correspond to the refrigeration section 211 one by one. The locking grooves 42 are strip-shaped grooves, and the length direction of the locking grooves 42 and the refrigeration part two 2112 axis are parallel to each other. A plurality of locking assemblies 17 are connected to the material tray 4, and the locking assemblies 17 correspond to the locking grooves 42 one by one. The locking assemblies 17 are used to fix the material tray 4 on the refrigeration pipeline 21.

[0064] With reference to Figure 3 and Figure 5 The locking assembly 17 includes a locking plate 171 and two thermal expansion and contraction blocks 172. In the embodiment of the present application, the material of the thermal expansion and contraction block 172 is nylon, which has a certain thermal expansion coefficient. The locking plate 171 is slidingly connected to the inner wall of the locking groove 42. The locking plate 171 slides in the direction close to the refrigeration pipeline 21, and the opposite two side walls of the locking plate 171 abut against the outer walls of the refrigeration part two 2112 and the refrigeration part four 2114 to form fixation.

[0065] With reference to Figure 3 and Figure 5, the locking plate 171 is a strip-shaped plate, the length direction of the locking plate 171 and the axis of the second refrigeration section 212 are parallel to each other, and the two thermal expansion and contraction blocks 172 are located at the two ends of the width direction of the locking plate 171. One end of the thermal expansion and contraction block 172 is fixed to the inner wall of the locking groove 42 close to the refrigeration pipeline 21, and the other end of the thermal expansion and contraction block 172 is fixed to the end face of the locking plate 171. When the staff clean the material chamber 1, the thermal expansion and contraction block 172 expands by heating, the thermal expansion and contraction block 172 drives the locking plate 171 to slide away from the refrigeration pipeline 21, and the end face of the locking plate 171 is flush with the bottom of the tray 4, so that the pressing force between the tray 4 and the refrigeration pipeline 21 disappears, the staff drives the tray 4 to slide away from the liquid inlet pipeline 63 along the axis of the second refrigeration section 212, and the separation of the tray 4 and the refrigeration pipeline 21 is realized, so as to facilitate the cleaning of the tray 4 and the storage of the material by the staff.

[0066] With reference to Figure 3 and Figure 5 When the low-temperature refrigeration and drying system is running, the thermal expansion and contraction block 172 shrinks by cooling, the thermal expansion and contraction block 172 drives the locking plate 171 to slide close to the refrigeration pipeline 21, and the opposite two side walls of the locking plate 171 press against the inner wall of the refrigeration pipeline 21, so as to increase the pressing force between the tray 4 and the refrigeration pipeline 21, so that the tray 4 is not easy to separate from the refrigeration pipeline 21, and the refrigeration and drying of the material on the tray 4 are ensured.

[0067] The implementation principle of the low-temperature refrigeration and drying system in the embodiment 2 is as follows: when the staff clean the material chamber 1, the thermal expansion and contraction block 172 expands by heating, the thermal expansion and contraction block 172 drives the locking plate 171 to slide away from the refrigeration pipeline 21, and the end face of the locking plate 171 is flush with the bottom of the tray 4, so that the pressing force between the tray 4 and the refrigeration pipeline 21 disappears, the staff drives the tray 4 to slide away from the liquid inlet pipeline 63 along the axis of the second refrigeration section 212, and the separation of the tray 4 and the refrigeration pipeline 21 is realized, so as to facilitate the cleaning of the tray 4 and the storage of the material by the staff.

[0068] When the low-temperature refrigeration and drying system is running, the thermal expansion and contraction block 172 shrinks by cooling, the thermal expansion and contraction block 172 drives the locking plate 171 to slide close to the refrigeration pipeline 21, and the opposite two side walls of the locking plate 171 press against the inner wall of the refrigeration pipeline 21, so as to increase the pressing force between the tray 4 and the refrigeration pipeline 21, so that the tray 4 is not easy to separate from the refrigeration pipeline 21, and the refrigeration and drying of the material on the tray 4 are ensured.

[0069] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A low temperature freeze-drying system, characterized by: The utility model provides a refrigeration device, including material room (1), freezing assembly (2) and cooling assembly (6), material room (1) has a plurality of trays (4) for material storage, freezing assembly (2) includes a plurality of freezing pipes (21) and vacuum pump (22), a plurality of freezing pipes (21) are connected in material room (1) inner chamber in sequence interval, and freezing pipe (21) corresponds with tray (4) one to one, a plurality of freezing pipes (21) are connected with the air extraction pipeline (5) between vacuum pump (22), the air extraction pipeline (5) intake end all intercommunication with a plurality of freezing pipes (21) exhaust end, the air extraction pipeline (5) exhaust end and vacuum pump (22) intake end intercommunication, the freezing pipe (21) is used for storing water, when vacuum pump (22) operates, the air in freezing pipe (21) enters vacuum pump (22) through the air extraction pipeline (5), the water vapor pressure of freezing pipe (21) inner chamber reduces, drives the water in freezing pipe (21) to absorb heat and vaporize, cooling assembly (6) is used for the water vapor discharged by vacuum pump (22) to release heat and liquefy and backflow to freezing pipe (21) inner chamber, cooling assembly (6) includes air inlet pipe (61), cooler (62) and liquid inlet pipe (63), air inlet pipe (61) one end intercommunication vacuum pump (22) exhaust end, air inlet pipe (61) other end intercommunication cooler (62) air inlet, liquid inlet pipe (63) one end intercommunication cooler (62) water outlet, liquid inlet pipe (63) other end and a plurality of freezing pipes (21) water inlet all intercommunication, vacuum pump (22) is connected with the water storage tank (10), the water storage tank (10) and air extraction pipeline (5) are connected with cooling pipe (11) between, the water storage tank (10) and liquid inlet pipe (63) are connected with heating pipe (13) between, heating pipe (13) is connected with driving element (14) on, still include drying assembly (3), drying assembly (3) includes air outlet pipe (31), exhaust pipe (32), air cut-off valve (33) and open-close valve (34), air outlet pipe (31) one end intercommunication material room (1) inner chamber, air outlet pipe (31) other end intercommunication air extraction pipeline (5), exhaust pipe (32) one end intercommunication air inlet pipe (61), exhaust pipe (32) other end intercommunication outside atmosphere, open-close valve (34) is connected on air inlet pipe (61), open-close valve (34) is used for controlling the on-off of air inlet pipe (61) and cooler (62) air inlet, air cut-off valve (33) is connected on air extraction pipeline (5), air cut-off valve (33) is used for controlling the on-off of freezing pipe (21) and air extraction pipeline (5), exhaust pipe (32) is connected with exhaust valve (9) on, exhaust valve (9) is used for controlling the on-off of exhaust pipe (32) and outside atmosphere, air outlet pipe (31) is connected with air outlet valve (8) on, air outlet valve (8) is used for controlling the on-off of air outlet pipe (31) and material room (1) inner chamber.The cooling pipeline (11) is connected with a cooling valve (12), the cooling valve (12) is used for controlling the on-off of the cooling pipeline (11) and the air extraction pipeline (5), the heating pipeline (13) is connected with a heating valve (18), and the heating valve (18) is used for controlling the on-off of the heating pipeline (13) and the liquid inlet pipeline (63).

2. The low temperature freeze-drying system of claim 1, wherein: The cooler (62) is used for water vapor heat release liquefaction to form liquid water, when the water vapor in the vacuum pump (22) enters the cooler (62) through the air inlet pipeline (61), the cooler (62) drives the water vapor to be liquefied to form liquid water, and the liquid water enters the inner cavity of the freezing pipeline (21) through the liquid inlet pipeline (63).

3. The low temperature freeze-drying system of claim 2, wherein: The drying assembly (3) is used for discharging the air in the inner cavity of the material chamber (1); the freezing assembly (2) first cools and freezes the material in the material chamber (1), and then the drying assembly (3) drives the air in the material chamber (1) to be discharged, so that the water vapor pressure in the inner cavity of the material chamber (1) is reduced, and the ice in the material absorbs heat to sublimate to form water vapor.

4. The low temperature freeze-drying system of claim 3, wherein: The inner cavity of the water storage tank (10) is used for storing water, when the vacuum pump (22) operates to be heated, the water in the water storage tank (10) exchanges heat with the vacuum pump (22), so that the vacuum pump (22) is cooled.

5. The low temperature freeze-drying system of claim 4, wherein: The driving member (14) is used for driving the hot water in the water storage tank (10) to pass through the heating pipeline (13) and the liquid inlet pipeline (63) in sequence and enter the freezing pipeline (21), the hot water in the freezing pipeline (21) exchanges heat with the material, so that the hot water in the freezing pipeline (21) is cooled, and the cold water in the freezing pipeline (21) passes through the air exhaust pipeline (5) and the cooling pipeline (11) in sequence and enters the inner cavity of the water storage tank (10).

6. The low temperature freeze-drying system of claim 5, wherein: When the drying assembly (3) works, the on-off valve (34) separates the air inlet of the cooler (62) and the air inlet pipeline (61), the air cut-off valve (33) separates the freezing pipeline (21) and the air exhaust pipeline (5), the vacuum pump (22) drives the air in the inner cavity of the material chamber (1) to pass through the air outlet pipeline (31) and the air exhaust pipeline (5) in sequence and enter the inner cavity of the vacuum pump (22), and the air in the inner cavity of the vacuum pump (22) passes through the air inlet pipeline (61) and the air exhaust pipeline (32) in sequence and is discharged to the outside atmosphere.

7. The low temperature freeze-drying system of claim 1, wherein: The heating pipeline (13) and the cooling pipeline (11) are connected with the circulation pipeline (15), when the cooling valve (12) separates the cooling pipeline (11) and the air exhaust pipeline (5), and the heating valve (18) separates the heating pipeline (13) and the liquid inlet pipeline (63), the driving member (14) drives the water in the water storage tank (10) to pass through the heating pipeline (13), the circulation pipeline (15) and the cooling pipeline (11) in sequence and enter the inner cavity of the water storage tank (10).

8. The low temperature freeze-drying system of claim 7, wherein: The circulation pipeline (15) is connected with the circulation valve (16), and the circulation valve (16) is used for controlling the opening and closing of the heating pipeline (13) and the circulation pipeline (15).

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