Concentrated supply freeze-drying system

Abstract

The utility model discloses a concentrated supply freeze-drying system which comprises freeze dryers and a refrigeration station, the refrigeration station is provided with a refrigeration system, the refrigerant output end of the refrigeration station is connected with the refrigerant input ends of at least two freeze dryers through a cold supply pipe, and the refrigerant output ends of the freeze dryers are connected with the refrigerant input end of the refrigeration station through a return pipe. The refrigerating system and the freeze dryer are not connected, the refrigerating system and the freeze dryer can be flexibly matched according to the capacity, and the adjustable width of the performance range of the freeze dryer is larger; according to the utility model, a plurality of original small-sized refrigerating systems are changed into a few large-sized refrigerating systems, so that the number of equipment is reduced, and the fault occurrence rate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of freeze-drying equipment, and more specifically, to a centralized refrigeration supply freeze-drying system. Background Art

[0002] A freeze-dryer is a key equipment for carrying out freeze-drying process research. The current freeze-dryers are all equipped with separate refrigeration systems. When multiple freeze-dryers are configured in a workshop, the equipment construction investment cost is high and the equipment occupies a large area. When there is a need for rapid cooling, the performance of the equipment is limited by the capacity of the configured refrigeration system, and the cost performance is low; at the same time, the cold source of the current freeze-dryer is relatively single. When multiple refrigerations are to be performed, the equipment structure is complex and the failure rate of the equipment is relatively high; freeze-drying is a high-energy-consuming process, and the current freeze-dryer has limited adjustment ability and serious power waste. Content of the Utility Model

[0003] Aiming at the defects of the existing technology in which multiple freeze-dryers are bloated and complex in structure, high in construction and use costs, and high in energy consumption when in use, the utility model provides a centralized refrigeration supply freeze-drying system.

[0004] To solve the above technical problems, the utility model proposes a centralized refrigeration supply freeze-drying system, including: a freeze-dryer and a refrigeration station. The refrigeration station is provided with a refrigeration system. The refrigerant output end of the refrigeration station is connected to the refrigerant input ends of at least two freeze-dryers through a cooling supply pipe, and the refrigerant output end of the freeze-dryer is connected to the refrigerant input end of the refrigeration station through a return pipe.

[0005] Further, the freeze-dryer includes a front box plate layer, a cold trap, a heater, a cooling valve, a temperature control valve, and a plate pump. The cooling supply pipe is communicated with the cold trap through a first branch pipe, and the cooling valve is arranged on the first branch pipe. The cooling supply pipe is communicated with the front box plate layer through a second branch pipe, and the temperature control valve, the heater, and the plate pump are arranged on the second branch pipe.

[0006] Further, a refrigerant supply temperature sensor is arranged at the refrigerant output end of the refrigeration station.

[0007] Further, the refrigeration station includes a refrigerant storage tank and a refrigerant circulation pump. The refrigerant storage tank is connected to multiple refrigeration systems. The refrigerant circulation pump is arranged between the output end of the refrigerant storage tank and the cooling supply pipe, and a pump overflow valve is arranged at its end.

[0008] Further, the refrigerant in the refrigerant storage tank is silicone oil or fluorinated liquid.

[0009] Further, a refrigerant storage temperature sensor is arranged on the refrigerant storage tank.

[0010] Further, a pump pressure detection station is also arranged between the refrigerant circulation pump and the cooling supply pipe.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] (1) There is no direct connection between the refrigeration system and the freeze dryer in the utility model. The refrigeration system and the freeze dryer can be flexibly matched according to capacity, and the adjustable width of the performance range of the freeze dryer is larger;

[0013] (2) The utility model changes multiple original small refrigeration systems into a few large refrigeration systems, reducing the number of devices and thus the failure rate;

[0014] (3) The structure of the utility model is relatively simple to control and does not require complex logic control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The features and advantages of the utility model will be more clearly understood by referring to the accompanying drawings. The drawings are schematic and should not be construed as limiting the utility model in any way. In the drawings:

[0016] Figure 1 is a schematic structural diagram of the centralized supply freeze-drying system disclosed in the first preferred embodiment of the utility model;

[0017] Figure 2 is a schematic structural diagram of the centralized supply freeze-drying system disclosed in the second preferred embodiment of the utility model;

[0018] DESCRIPTION OF THE REFERENCE NUMERALS

[0019] 1. Freeze dryer; 101. Front box plate layer; 102. Cold trap; 103. Heater; 104. Cooling valve; 105. Temperature control valve; 106. Plate layer pump; 2. Refrigeration system; 3. Cold supply pipe; 4. Return pipe; 5. Refrigerant storage tank; 6. Refrigerant supply temperature sensor; 7. Refrigerant circulation pump; 8. Pump overflow valve; 9. Refrigerant storage temperature sensor; 10. Pump pressure detection station; 11. Liquid nitrogen supply system; 12. Cold air recovery system; 13. Exhaust valve; 14. Recovery valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the above objects, features and advantages of the utility model more obvious and understandable, the following detailed description of the specific embodiments of the utility model will be made with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed below.

[0021] Embodiment 1

[0022] As Figure 1As shown, an embodiment of the present utility model discloses a centralized refrigerated drying system. Specifically, the centralized refrigerated drying system includes the following structures:

[0023] A centralized refrigerated drying system includes a freeze dryer 1 and a refrigeration station. The refrigeration station is provided with a refrigeration system 2. The refrigerant output end of the refrigeration station is connected to the refrigerant input ends of at least two freeze dryers 1 through a cooling supply pipe 3. The refrigerant output end of the freeze dryer 1 is connected to the refrigerant input end of the refrigeration station through a return pipe 4. The freeze dryers 1 are connected to the refrigeration station in parallel through the cooling supply pipe 3 and the return pipe 4.

[0024] In some preferred embodiments, the freeze dryer 1 includes a front box panel layer 101, a cold trap 102, a heater 103, a temperature reduction valve 104, a temperature control valve 105, and a panel pump 106. The cooling supply pipe 3 is communicated with the cold trap 102 through a first branch pipe. The temperature reduction valve 104 is arranged on the first branch pipe. The cooling supply pipe 3 is communicated with the front box panel layer 101 through a second branch pipe. The temperature control valve 105, the heater 103, and the panel pump 106 are arranged on the second branch pipe.

[0025] When a certain freeze dryer 1 needs to operate and has a refrigeration requirement, the temperature control valve 105 connected to it is opened. The refrigerant inside the front box panel layer 101 obtains cold energy through the heat exchanger and starts pre-freezing and temperature reduction. The opening degree of the temperature control valve 105 can effectively control the temperature reduction rate. By jointly controlling the temperature control valve 105 and the heater 103, the temperature of the front box panel layer 101 can be effectively controlled. When the cold trap 102 needs to be cooled down, the temperature reduction valve 104 connected to it is opened, and the refrigerant of the refrigeration station directly enters the cold trap 102, and the cold trap 102 realizes temperature reduction. Multiple freeze dryers 1 are in parallel. As long as the capacity of the refrigeration station is sufficient, there is no influence on each other. The production sequence of the freeze dryers 1 is very flexible.

[0026] In some preferred embodiments, a refrigerant supply temperature sensor 6 is arranged at the refrigerant output end of the refrigeration station. When the refrigerant supply temperature sensor 6 detects that the output refrigerant temperature is too high, the system cannot add additional freeze dryers 1 to ensure the effective production of products.

[0027] In some preferred embodiments, the refrigeration station includes a refrigerant storage tank 5 and a refrigerant circulation pump 7. The refrigerant storage tank 5 is connected to a plurality of refrigeration systems 2. The refrigerant circulation pump 7 is arranged between the output end of the refrigerant storage tank 5 and the cooling supply pipe 3, and a pump overflow valve 8 is provided at its end. The refrigerant circulation pump 7 provides the refrigerant circulation between the refrigeration station and the freeze dryer 1, and the refrigerant flow rate of the refrigeration station is adjustable. When there are many operating freeze dryers 1, the flow rate increases, and vice versa. It can be adjusted through the pump overflow valve 8. When there are many operating freeze dryers 1, the opening of the pump overflow valve 8 decreases, and vice versa, the opening of the pump overflow valve 8 increases. It can also be adjusted by frequency conversion. When more flow rate is required, the rotational speed of the pump increases. Finally, the liquid supply pressure of the refrigeration station is detected by the pump pressure detection station 10 between the refrigerant circulation pump 7 and the cooling supply pipe 3 to ensure the normal operation of the system.

[0028] In some preferred embodiments, the refrigerant in the refrigerant storage tank 5 is silicone oil or fluorinated liquid. The refrigerant storage tank 5 needs to be large enough so that when the freeze dryer 1 requires a large amount of cooling, the temperature fluctuation of the refrigerant storage tank 5 is relatively small.

[0029] In some preferred embodiments, the refrigerant storage tank 5 is provided with a refrigerant storage temperature sensor 9. When there are many freeze dryers 1, all the refrigeration systems 2 can operate at full load. When some freeze dryers 1 are operating, only some of the refrigeration systems 2 can operate, which can effectively save energy.

[0030] In some preferred embodiments, the refrigeration system 2 can be one type or a mixture of multiple types. The refrigeration methods include compression refrigeration, liquid nitrogen evaporation refrigeration, and air compression expansion refrigeration.

[0031] There is no direct connection between the operation of the refrigeration system 2 and the freeze dryer 1 in the present utility model. The refrigeration and temperature control of the freeze dryer 1 do not require the direct participation of the refrigeration system 2. The operation of the refrigeration system 2 only considers the temperature of the refrigeration station and does not need to consider which freeze dryer 1 is operating. When the cooling capacity is large, all the refrigeration systems 2 are fully opened. When the cooling capacity is small, only some of the refrigeration systems 2 operate.

[0032] The freeze dryer 1 in the present utility model does not have a refrigeration system 2 and only has a heat exchanger, which greatly reduces the complexity and floor area.

[0033] Embodiment 2

[0034] As Figure 2As shown in the figure, the difference between this embodiment and Embodiment 1 is that: since the cold trap 102 needs to be defrosted at high temperature, the return temperature of the cooling medium for the cold trap 102 to cool down will be very high, and there is also a large waste of the cold source. Using liquid nitrogen to cool the cold trap 102 can effectively avoid this problem. In this embodiment, the cold trap 102 is directly cooled by the liquid nitrogen supply system 11. There is a temperature detection at the nitrogen discharge port. When the temperature is higher than the temperature of the refrigerant station, the nitrogen is directly discharged through the exhaust valve 13. When the discharged temperature of the nitrogen is lower than the temperature of the refrigerant station, through the recovery valve 14 and the cold air recovery system 12, the low-temperature nitrogen is injected into the refrigerant station. In this way, energy can be effectively saved, and there is no need to worry about the energy waste caused by the too low temperature of the cold trap 102.

[0035] In this embodiment, the supply cooling pipe 3 is not provided with a branch pipe connected to the cold trap 102, and the refrigerant entering the front box plate layer 101 is directly discharged into the return pipe 4.

[0036] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A centralized refrigeration and drying system, characterized in that, Including: A freeze dryer (1) and a refrigeration station. The refrigeration station is provided with a refrigeration system (2). The refrigerant output end of the refrigeration station is connected to the refrigerant input ends of at least two freeze dryers (1) through a cooling supply pipe (3). The refrigerant output end of the freeze dryer (1) is connected to the refrigerant input end of the refrigeration station through a return pipe (4).

2. The centralized refrigerated drying system according to claim 1, wherein The freeze dryer (1) includes a front box panel layer (101), a cold trap (102), a heater (103), a temperature reduction valve (104), a temperature control valve (105), and a panel pump (106). The cooling supply pipe (3) is communicated with the cold trap (102) through a first branch pipe. The temperature reduction valve (104) is arranged on the first branch pipe. The cooling supply pipe (3) is communicated with the front box panel layer (101) through a second branch pipe. The temperature control valve (105), the heater (103), and the panel pump (106) are arranged on the second branch pipe.

3. The centralized refrigerated drying system according to claim 1, characterized in that, A refrigerant supply temperature sensor (6) is arranged at the refrigerant output end of the refrigeration station.

4. The centralized refrigerated drying system according to claim 3, wherein The refrigeration station includes a refrigerant storage tank (5) and a refrigerant circulation pump (7). The refrigerant storage tank (5) is connected to a plurality of refrigeration systems (2). The refrigerant circulation pump (7) is arranged between the output end of the refrigerant storage tank (5) and the cooling supply pipe (3), and a pump overflow valve (8) is arranged at its end.

5. The centralized freeze-drying system according to claim 4, characterized in that, The refrigerant in the refrigerant storage tank (5) is silicone oil or fluorinated liquid.

6. The centralized refrigerated drying system according to claim 5, characterized in that, The refrigerant storage tank (5) is provided with a refrigerant storage temperature sensor (9).

7. The centralized refrigerated drying system according to claim 4, wherein A pump pressure detection station (10) is also arranged between the refrigerant circulation pump (7) and the cooling supply pipe (3).

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