Technical realization elements of alternative pre-cooling liquid nitrogen quick-freezing machine

Technical realization elements:

4. The purpose of this utility model is to provide an alternative pre-cooling liquid nitrogen quick-freezer, which can perform cooling and pre-cooling work on two different cooling chambers respectively, and utilize the cold produced by the vaporization of liquid nitrogen to a greater extent. Degree, and can guarantee the effect of freezing.

5. In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is to provide an alternative pre-cooling liquid nitrogen quick-freezer, which includes a fixedly connected cooling chamber a and a cooling chamber b, and a connection point between the cooling chamber a and the cooling chamber b A connecting pipe is provided, the cooling chamber a and the cooling chamber b are screwed with circulating fans, the cooling chamber a and the cooling chamber b are respectively provided with a liquid nitrogen device a and a liquid nitrogen device b, and the liquid nitrogen device a and the liquid nitrogen device b are both It includes a liquid nitrogen tube and a vaporization device connected to the liquid nitrogen tube. The vaporization device includes a vaporization tube, an evaporator located inside the vaporization tube, a flow controller located at the port of the vaporization tube, and a vaporization tube that is evenly located on the side of the vaporization tube facing the cooling chamber a. The air jet, circulating fan, evaporator, and flow controller are all electrically connected to the plc controller.

6. The beneficial effect of adopting the above scheme is that the device adopts double cooling chambers, and is connected with a liquid nitrogen pipeline. After the liquid nitrogen is evaporated and vaporized by the evaporator in the vaporization device in the liquid nitrogen device, it becomes cold. Nitrogen is sprayed into the cooling chamber at high speed through the jet port, and the items that need to be frozen in the cooling chamber are cyclically refrigerated under the action of the circulating fan, and the nitrogen is transferred to the other cooling chamber through the connecting pipe between the cooling chamber a and the cooling chamber b Room to pre-cool the items that need to be frozen in another cooling room. Among them, the flow controller can control the input amount of liquid nitrogen, ensure the concentration and input rate of liquid nitrogen, prevent excessive input or insufficient input, which causes waste of resources or poor freezing effect on nitrogen, and the temperature measurement device can transmit the temperature change of the cooling chamber It is convenient for operators to adjust and control in time. The model of the plc controller can be Omron cp1hx40dt

D-type plc controller.

7. Further, the communicating pipe includes a communicating pipe one and a communicating pipe two, the communicating pipe one is arranged at the upper ends of the cooling chamber a and the cooling chamber b, and the communicating pipe two is arranged at the lower ends of the cooling chamber a and the cooling chamber b.

8. The beneficial effect of adopting the above-mentioned scheme is that by providing two communicating pipes, the refrigerating and pre-cooling air can be introduced in both directions, which is convenient for control.

9. Further, the first connecting pipe includes a pipe body, and the inside of the pipe body is provided with a funnel-shaped opening, an air injection tube and an air injection port, and the leakage

The funnel-shaped opening faces the cooling chamber a, and the funnel-shaped opening is provided with a temperature sensor and an electromagnetic valve one; wherein, both the temperature sensor and the electromagnetic valve are electrically connected to the controller.

10. Further, the second connecting pipe includes a pipe body, and the inside of the pipe body is provided with a funnel-shaped opening, a gas injection tube and a gas injection port, the funnel-shaped opening opening faces the cooling chamber b, and the funnel-shaped opening is provided with a temperature sensor and an electromagnetic valve two; wherein , Both the temperature sensor and the electromagnetic valve are electrically connected to the controller.

11. The beneficial effect of adopting the above scheme is: through the setting of the connecting pipe, the remaining cold nitrogen in the cooling chamber can be stored in the funnel-shaped opening, when the temperature sensor detects that the temperature reaches the temperature range set by the system , Open the electromagnetic valve, transport the nitrogen from the tube body to the jet port, and spray it out from the jet port. Two connecting pipes with different directions are provided, and the two-way gas can be selectively introduced; the model of the temperature sensor can be cwdz31 Waterproof temperature transmitter.

12. Further, the air injection ports of the first connecting pipe and the second connecting pipe are evenly provided with a number of holes.

13. The beneficial effect of adopting the above solution is: a number of uniform holes can uniformly discharge the collected cold air to the pre-cooling chamber, and can prevent the gas from flowing back.

14. Further, the upper part of the cooling chamber a and the cooling chamber b are respectively provided with an independent exhaust pipe a and an exhaust pipe b.

15. The beneficial effect of adopting the above scheme is that the nitrogen after the pre-cooling effect in the latter cooling chamber can be discharged through the exhaust pipe, and the exhaust pipe a and the exhaust pipe b do not interfere with each other, ensuring the normal operation of the quick-freezer.

16. Further, the liquid nitrogen device a and the liquid nitrogen device b are respectively provided with a liquid nitrogen valve a and a liquid nitrogen valve b on the liquid nitrogen pipe, and both the liquid nitrogen valve a and the liquid nitrogen valve b are electrically connected to the plc controller.

17. The beneficial effect of adopting the above scheme is that the external liquid nitrogen can be closed or opened in time through the control of an independent liquid nitrogen valve, and the liquid nitrogen in the liquid nitrogen device can be supplemented in time.

18. Further, a heat preservation layer is arranged around the cooling chamber a and the cooling chamber b, and the material of the heat preservation layer is glass fiber cotton.

19. The beneficial effect of adopting the above-mentioned scheme is that the heat insulation layer can isolate the outside air and the nitrogen in the cooling chamber for heat exchange, and reduce the loss of coldness.

20. Further, there are 4 circulating fans, which are vertically and evenly distributed in the cooling chamber a and the cooling chamber b.

21. The beneficial effect of adopting the above-mentioned scheme is: a circulating fan is installed at the upper and lower ends of the cooling chamber, and the nitrogen sprayed from both sides can be circulated and supplied in time, so that the nitrogen can be fully circulated in the cooling chamber in time, which meets the needs of all directions. Frozen items are ventilated evenly.

22. In summary, the utility model has the following advantages:

23.1. By pre-cooling the product, the temperature difference during quick freezing is reduced, while ensuring that the quick freezing can be carried out at a lower temperature;

24.2. The cold energy of the gas after quick freezing is reused to pre-cool the products to be frozen to reduce the loss of cold energy and improve the efficiency of energy utilization;

25.3. Two freezer compartments are set up and used alternately. The equipment has a compact structure and high energy utilization efficiency and production efficiency.

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