Liquid nitrogen quick-freezing tunnel equipment with improved exhaust mode

Abstract

Liquid nitrogen quick-freezing tunnel equipment with an improved exhaust mode comprises a tunnel body, a liquid nitrogen refrigerating device and at least two fans are arranged in the tunnel body, the liquid nitrogen refrigerating device comprises a liquid nitrogen storage tank and a liquid nitrogen spraying device, the liquid nitrogen spraying device comprises a liquid nitrogen pipeline, and the liquid nitrogen pipeline is connected with the liquid nitrogen storage tank. At least two liquid nitrogen nozzles are arranged on the liquid nitrogen pipeline in the length direction at intervals, at least two exhaust ports are formed in the bottom face of the tunnel body in the length direction at intervals, any exhaust port is connected with one end of an exhaust pipe body, and the other end of the exhaust pipe body extends to the outer side of the tunnel body. According to the principle that nitrogen sinks at the bottom of air due to the fact that the density of the nitrogen is larger than that of the air, a tunnel top exhaust mode is replaced with a bottom exhaust mode, and therefore the nitrogen is completely exhausted from the tunnel body, nitrogen accumulation is reduced, the quick-freezing efficiency is improved, and waste caused by nitrogen leakage is reduced; suffocation and even serious harm to the human body are prevented.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to the liquid nitrogen quick-freezing technology, and especially to a liquid nitrogen quick-freezing tunnel device with an improved exhaust mode. Background Art

[0002] The liquid nitrogen quick-freezing tunnel uses liquid nitrogen for refrigeration and quick-freezing work. In the prior art, the liquid nitrogen quick-freezing tunnel uses a top exhaust mode. Since the density of nitrogen is greater than that of air, it will sink to the bottom of the air, resulting in incomplete exhaustion, reducing the quick-freezing efficiency. Moreover, the nitrogen accumulation in the equipment is likely to leak to the outside of the equipment in a large amount in a short time from the entrances and exits, causing waste and posing serious hazards such as asphyxiation to the human body, resulting in potential safety hazards.

[0003] Air is mainly composed of nitrogen, oxygen, argon, carbon dioxide, etc. In addition to nitrogen, air also includes oxygen, noble gases, water vapor, etc. Nitrogen in the air accounts for the vast majority, about 78%, oxygen accounts for about 21%, and other gases account for about 1%. Since liquid nitrogen evaporates rapidly after contacting air, a large amount of nitrogen is generated and the volume expands rapidly. After exceeding the limit, it will emerge from the entrances and exits of the tunnel and fill the entire space, gradually replacing the oxygen in the air and reducing the oxygen concentration to cause asphyxiation. When inhaling nitrogen with a not-too-high concentration, one will initially feel chest tightness, shortness of breath, and weakness; then there will be restlessness, extreme excitement, running around, shouting, trance, and unsteady gait, which is called "nitrogen intoxication" and can lead to a coma state. When inhaling a high concentration, one will quickly fall into a coma and die due to respiratory and cardiac arrest. Summary of the Invention

[0004] The purpose of the utility model is to provide a liquid nitrogen quick-freezing tunnel device with an improved exhaust mode, and the liquid nitrogen quick-freezing tunnel device with the improved exhaust mode is to solve the technical problem that nitrogen in the liquid nitrogen quick-freezing tunnel in the prior art is likely to leak from the entrances and exits of the equipment.

[0005] A liquid nitrogen quick-freezing tunnel device with an improved exhaust mode of the utility model includes a tunnel body, in which a liquid nitrogen refrigeration device and at least two fans are arranged. The liquid nitrogen refrigeration device includes a liquid nitrogen storage tank and a liquid nitrogen spraying device. The liquid nitrogen spraying device includes a liquid nitrogen pipeline, on which an electromagnetic valve is arranged. The liquid nitrogen pipeline is parallel to the length direction of the tunnel body and is connected to the liquid nitrogen storage tank. At least two liquid nitrogen nozzles are arranged at intervals along the length direction of the liquid nitrogen pipeline. The fans are arranged at intervals along the length direction of the tunnel body. At least two exhaust ports are arranged at intervals along the length direction in the bottom surface of the tunnel body, and each exhaust port is respectively connected to one end of an exhaust pipe body, and the other end of the exhaust pipe body extends to the outside of the tunnel body.

[0006] Further, the exhaust pipe body extends in the width direction of the tunnel body.

[0007] Compared with the prior art, the effects of the present utility model are positive and obvious. An improved exhaust mode of liquid nitrogen quick-freezing tunnel equipment of the present utility model utilizes the principle that the density of nitrogen is greater than that of air and will sink to the bottom of the air, replaces the exhaust mode at the top of the tunnel with the exhaust mode at the bottom, thereby completely discharging nitrogen from the inside of the tunnel body, reducing nitrogen accumulation, increasing the quick-freezing efficiency, reducing waste caused by nitrogen leakage, and preventing suffocation or even serious harm to the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a cross-sectional schematic view of an improved exhaust mode of liquid nitrogen quick-freezing tunnel equipment of the present utility model.

[0009] Figure 2 It is a three-dimensional schematic view of an improved exhaust mode of liquid nitrogen quick-freezing tunnel equipment of the present utility model.

[0010] Figure 3 It is a schematic view of an exhaust pipe body in an improved exhaust mode of liquid nitrogen quick-freezing tunnel equipment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0011] The present utility model will be further described below in conjunction with embodiments, but the present utility model is not limited to these embodiments. Any similar structure and its similar changes of the present utility model should be included in the protection scope of the present utility model. The use of directions such as up, down, front, back, left, and right in the present utility model is only for the convenience of clear description and is not a limitation on the technical solution of the present utility model.

[0012] As Figures 1 - 3 shown, an improved exhaust mode of liquid nitrogen quick-freezing tunnel equipment of the present utility model includes a tunnel body 1. A liquid nitrogen refrigeration device (not shown in the figure) and at least two fans (not shown in the figure) are arranged in the tunnel body 1. The liquid nitrogen refrigeration device includes a liquid nitrogen storage tank and a liquid nitrogen spraying device. The liquid nitrogen spraying device includes a liquid nitrogen pipeline. An electromagnetic valve is arranged on the liquid nitrogen pipeline. The liquid nitrogen pipeline is parallel to the length direction of the tunnel body 1. The liquid nitrogen pipeline is connected to the liquid nitrogen storage tank. At least two liquid nitrogen nozzles are arranged at intervals along the length direction of the liquid nitrogen pipeline. The fans are arranged at intervals along the length direction of the tunnel body 1. At least two exhaust ports 2 are arranged at intervals along the length direction of the bottom surface of the tunnel body 1. Each exhaust port 2 is connected to one end of an exhaust pipe body 3 respectively. The other end of the exhaust pipe body 3 extends to the outside of the tunnel body 1.

[0013] Further, the exhaust pipe body 3 extends in the width direction of the tunnel body 1.

[0014] Specifically, the tunnel body 1, the fan, the liquid nitrogen storage tank, the liquid nitrogen spraying device, the solenoid valve, the liquid nitrogen nozzle, etc. in this embodiment all adopt well-known solutions in the prior art, which are already understood by those skilled in the art and will not be elaborated here.

[0015] The working principle of this embodiment is as follows:

[0016] When the liquid nitrogen quick-freezing tunnel equipment starts to work, the liquid nitrogen refrigeration device 3 uses the solenoid valve to control the liquid nitrogen nozzle 5 to spray out the liquid nitrogen stored in the liquid nitrogen storage tank. The liquid nitrogen vaporizes into a gas with an extremely low temperature when contacting the air. Under the action of the fan 4, the cold air is evenly distributed in the tunnel body 1 to cool and freeze the product. Subsequently, the nitrogen gas passes through the exhaust pipe body 3 at the bottom along Figure 1 the arrow direction shown and is discharged from the tunnel body 1.

[0017] A liquid nitrogen quick-freezing tunnel equipment with an improved exhaust method of the present utility model utilizes the principle that the density of nitrogen is greater than that of air and it will sink to the bottom of the air, and changes the exhaust method from the top of the tunnel to the bottom exhaust method, so as to completely discharge the nitrogen from the tunnel body 1, reduce the accumulation of nitrogen, increase the quick-freezing efficiency, reduce the waste caused by nitrogen leakage, and prevent suffocation and even serious harm to the human body.

Claims

1. A liquid nitrogen quick freezing tunnel device with improved exhaust mode, characterized in that: The invention comprises a tunnel body, wherein a liquid nitrogen refrigeration device and at least two fans are arranged in the tunnel body, the liquid nitrogen refrigeration device comprises a liquid nitrogen storage tank and a liquid nitrogen spraying device, the liquid nitrogen spraying device comprises a liquid nitrogen pipeline, a solenoid valve is arranged on the liquid nitrogen pipeline, the liquid nitrogen pipeline is parallel to the length direction of the tunnel body, the liquid nitrogen pipeline is connected to the liquid nitrogen storage tank, at least two liquid nitrogen nozzles are arranged at intervals along the length direction on the liquid nitrogen pipeline, the fans are arranged at intervals along the length direction of the tunnel body, at least two exhaust ports are arranged at intervals in the bottom surface of the tunnel body along the length direction thereof, any exhaust port is respectively connected to one end of an exhaust pipe body, and the other end of the exhaust pipe body extends to the outside of the tunnel body.

2. The liquid nitrogen quick freezing tunnel equipment with improved exhaust mode according to claim 1, characterized in that: The exhaust pipe body extends in the width direction of the tunnel body.

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