Centrifugal fan equipment for nitrogen emission of liquid nitrogen instant freezer

Abstract

The utility model discloses centrifugal fan equipment for nitrogen emission of a liquid nitrogen instant freezer, and relates to the technical field of air exhaust of liquid nitrogen instant freezers. Comprising a centrifugal fan, a three-way connector is fixedly connected to the centrifugal fan, a front hose is fixedly connected to the three-way connector, a hard pipe is fixedly connected to the front hose, a rear hose is fixedly connected to the hard pipe, and an exhaust port of the liquid nitrogen refrigerator is fixedly connected to the rear hose; due to the introduction of the three-way connector, natural hot air can heat blades of the centrifugal fan, and the frosting problem during long-time operation is effectively prevented; the centrifugal fan accurately controls the air draft amount of an air outlet pipeline of the liquid nitrogen instant freezer through the frequency conversion control system so as to adapt to different working conditions and operation requirements. Compared with a traditional electric heating mode, natural hot air heating is adopted, safety and reliability are higher, and potential safety hazards possibly caused by electric heating are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of air exhaust for liquid nitrogen quick freezing machines, in particular to a centrifugal fan device used for nitrogen discharge of liquid nitrogen quick freezing machines. Background Art

[0002] In the fields of food processing, biomedicine, etc., liquid nitrogen quick freezers are widely used for quick freezing of products. A large amount of low-temperature nitrogen will be generated during the liquid nitrogen quick freezing process, which needs to be discharged in time through centrifugal fan equipment. However, the traditional nitrogen discharge system has the following technical problems: when low-temperature nitrogen is discharged directly through the centrifugal fan, the surface of the fan blade is prone to frost due to the low temperature environment. After long-term operation, frost will cause fan blockage, reduced efficiency, and even equipment failure, increasing maintenance costs. In order to prevent frost, the existing technology often uses electric heating to heat the fan blades, but electric heating has safety risks such as leakage and short circuit, especially in humid or flammable and explosive working environments, the safety hazards are more prominent. The traditional centrifugal fan has a relatively single air volume adjustment method, and it is difficult to accurately control the air volume according to the different working conditions of the liquid nitrogen quick freezer (such as changes in the liquid nitrogen discharge speed), resulting in energy waste or untimely discharge. The existing discharge system's pipeline connection mostly uses hard pipes or single hoses. The vibration of the centrifugal fan during operation can easily cause the pipeline connection to loosen, affecting the stability of the system and even causing gas leakage. Utility Model Content

[0003] In response to the above technical problems, the present application effectively solves the problems of frosting, safety hazards, high energy consumption and unstable connection.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted in the present application is: a centrifugal fan device for nitrogen discharge of a liquid nitrogen quick freezing machine, comprising a centrifugal fan, a three-way joint fixedly connected to the centrifugal fan, a front hose fixedly connected to the three-way joint, a hard pipe fixedly connected to the front hose, a rear hose fixedly connected to the hard pipe, and the rear hose fixedly connected to the exhaust port of the liquid nitrogen freezer.

[0005] Preferably, the centrifugal fan is provided with an air suction port and a manually controlled air valve.

[0006] Preferably, the air intake port of the three-way joint draws in natural hot air to heat the centrifugal fan blades.

[0007] Preferably, the centrifugal fan is provided with a variable frequency control system for controlling the air extraction volume of the main duct.

[0008] Preferably, the centrifugal fan adopts natural air heating to improve safety and reliability.

[0009] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0010] 1. The utility model introduces a three-way joint so that natural hot air can heat the centrifugal fan blades, effectively preventing the frost problem during long-term operation.

[0011] 2. The centrifugal fan of the utility model accurately controls the air extraction volume of the exhaust pipe of the liquid nitrogen quick freezing machine through a frequency conversion control system to adapt to different working conditions and operation requirements.

[0012] 3. Compared with the traditional electric heating method, the utility model adopts natural hot air heating, which is safer and more reliable, and avoids the potential safety hazards caused by electric heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the mechanism of the centrifugal fan of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the three-way connector of the utility model;

[0017] In the figure: 101, centrifugal fan; 102, three-way connector; 103, manually controlled air valve; 104, front hose; 105, hard pipe; 106, rear hose. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] In the description of this application, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, if the terms "first", "second", etc. appear in the description of this application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] In addition, if the terms "horizontal" or "vertical" appear in the description of this application, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] Embodiment 1:

[0025] like Figures 1 to 3 As shown, a centrifugal fan 101 device for nitrogen discharge of a liquid nitrogen quick freezer includes a centrifugal fan 101, a three-way joint 102 is fixedly connected to the centrifugal fan 101, a front hose 104 is fixedly connected to the three-way joint 102, a hard pipe 105 is fixedly connected to the front hose 104, a rear hose 106 is fixedly connected to the hard pipe 105, and the rear hose 106 is fixedly connected to the exhaust port of the liquid nitrogen freezer.

[0026] The three-way joint 102 and the centrifugal fan 101 are fixed with a plurality of screws to meet the installation requirements at different angles and facilitate on-site construction.

[0027] The hard tube 105 is connected to the three-way structure through the front hose 104, and the front hose 104 is used for buffering to prevent the vibration generated when the centrifugal fan 101 is working from affecting the stability of the three-way interface and the fixation of the hard tube 105. The hard tube 105 is provided to ensure the stability of the connection to prevent the hose from shaking frequently when the liquid nitrogen flow flows through a long hose. The rear hose 106 is provided to buffer the connection between the hard tube 105 and the liquid nitrogen quick freezer to prevent the vibration generated when the liquid nitrogen quick freezer is working from affecting the stability of the fixation of the hard tube 105.

[0028] like Figure 2 and Figure 3 As shown, the centrifugal fan 101 is provided with an air suction port and a manually controlled air valve 103 .

[0029] The natural air from the outside is absorbed through the air suction port, and the manual control air valve 103 is adjusted by manual operation, thereby adjusting the angle of the valve in the air suction port to control the air suction volume.

[0030] The air intake of the three-way joint 102 draws in natural hot air to heat the blades of the centrifugal fan 101 to prevent frost.

[0031] When inhaling natural air from the outside, the air is also mixed with the nitrogen discharged from the liquid nitrogen quick freezer, and the temperatures of the two airflows are neutralized, so that the temperature of the mixed gas is lower than the outside temperature and higher than the nitrogen discharged from the liquid nitrogen quick freezer, thereby further avoiding the centrifugal fan 101 from frosting the fan blades due to the mixed gas temperature being too low when discharging the mixed gas.

[0032] The centrifugal fan 101 is provided with a variable frequency control system for controlling the air extraction volume of the main duct.

[0033] The speed of the centrifugal fan 101 is adjusted by the frequency conversion control system, thereby controlling the exhaust capacity of the exhaust pipe connected to the liquid nitrogen quick freezer, so as to adapt to the different speeds of liquid nitrogen discharge from the liquid nitrogen quick freezer under different working conditions, thereby saving power consumption and reducing cost expenditure.

[0034] The centrifugal fan 101 adopts a natural air heating method to improve safety and reliability.

[0035] When the liquid nitrogen quick freezer is running, the liquid nitrogen vaporizes into nitrogen in the cold chamber of the quick freezer. The temperature of the nitrogen is still low. When the centrifugal fan 101 is used to exhaust nitrogen, the exhaust fan is prone to frost when the equipment is running for a long time, causing the fan to be blocked. When the three-way connector 102 is added, the natural hot air heats the blades of the centrifugal fan 101 to prevent frost. The centrifugal fan 101 uses frequency conversion control or manual valve to control the exhaust flow, and the double protection further ensures that there is no frost and blockage.

[0036] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A centrifugal fan (101) device for discharging nitrogen from a liquid nitrogen quick freezer, comprising a centrifugal fan (101), characterized in that: The centrifugal fan (101) is fixedly connected to a three-way joint (102), the three-way joint (102) is fixedly connected to a front hose (104), the front hose (104) is fixedly connected to a hard pipe (105), the hard pipe (105) is fixedly connected to a rear hose (106), and the rear hose (106) is fixedly connected to an exhaust port of a liquid nitrogen freezer.

2. A centrifugal fan (101) device for nitrogen discharge of a liquid nitrogen quick freezer according to claim 1, characterized in that: The centrifugal fan (101) is provided with an air suction port and a manually controlled air valve (103).

3. A centrifugal fan (101) device for nitrogen discharge of a liquid nitrogen quick freezer according to claim 2, characterized in that: The air intake port of the three-way joint (102) draws in natural hot air to heat the blades of the centrifugal fan (101).

4. A centrifugal fan (101) device for nitrogen discharge of a liquid nitrogen quick freezer according to claim 1, characterized in that: The centrifugal fan (101) is provided with a variable frequency control system for controlling the air extraction volume of the main duct.

5. A centrifugal fan (101) device for nitrogen discharge of a liquid nitrogen quick freezer according to claim 3, characterized in that: The centrifugal fan (101) adopts a natural air heating method to improve safety and reliability.

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