Refrigerant recovery device

Abstract

The utility model provides a refrigerant recovery device, and relates to the technical field of refrigerant recovery. The recovery device comprises a recovery tank, a disinfection device, a pressure tank and a refrigerator. And one end of the recovery tank is communicated with external freezing equipment. One end of the disinfection device is communicated with the recovery tank, and the other end is communicated with the pressure tank. The inlet end of the refrigerator is communicated with the pressure tank, and the outlet end is communicated with the liquid nitrogen storage equipment. The disinfection device comprises a conveying pipeline, a mounting plate, an ultraviolet lamp and a drainage assembly. One end of the conveying pipeline is communicated with the recovery tank, and the other end is communicated with the pressure tank. The multiple mounting plates are arranged in the axis direction of the conveying pipeline, and the mounting plates and the conveying pipeline are eccentrically arranged after being mounted, so that a nitrogen channel is formed between the mounting plates and the inner side wall of the conveying pipeline; and the ultraviolet lamps are mounted on opposite side walls of the mounting plate. One end of the drainage assembly communicates with the conveying pipeline. According to the utility model, the used nitrogen in the freezer is recycled, so that the refrigeration cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of refrigerant recovery technology, and in particular to a refrigerant recovery device. Background Technology

[0002] Currently, biological samples are mainly stored using liquid nitrogen tanks for cryopreservation. During storage, operators need to place the biological samples in cryovials and then place the cryovials directly into the liquid nitrogen tank for deep cryogenic storage.

[0003] Liquid nitrogen tanks reheat liquid nitrogen to a designated temperature before transferring it into a freezer. Items inside the freezer are then frozen. To maintain a constant temperature within the freezer, a continuous supply of liquid nitrogen is required, and excess gas needs to be vented. Current methods involve directly releasing this excess gas into the atmosphere, wasting nitrogen and increasing refrigeration costs. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a refrigerant recovery device that recovers and processes nitrogen gas used in a freezer, thereby reducing refrigeration costs.

[0005] The technical solution adopted in this utility model is:

[0006] A refrigerant recovery device, comprising:

[0007] The recycling tank is connected at one end to external refrigeration equipment;

[0008] The disinfection device is connected to the recycling tank;

[0009] A pressure tank, connected to the disinfection device;

[0010] The refrigerator has its inlet end connected to the pressure tank and its outlet end connected to the liquid nitrogen storage device.

[0011] The disinfection device includes:

[0012] The conveying pipeline is connected at one end to the recycling tank and at the other end to the pressure tank;

[0013] Mounting plates are provided along the axial direction of the conveying pipeline. After installation, the mounting plates are eccentrically positioned with respect to the conveying pipeline, so that a nitrogen channel is formed between the mounting plates and the inner wall of the conveying pipeline, and two adjacent nitrogen channels are positioned opposite each other.

[0014] Ultraviolet lamps are installed on opposite sidewalls of each of the mounting plates;

[0015] A drainage component, one end of which is connected to the delivery pipe.

[0016] Optionally, the recycling tank includes:

[0017] The recovery pipe is connected at one end to an external refrigeration unit.

[0018] The tank is connected to the other end of the recycling pipeline, and the disinfection device is connected to the tank;

[0019] A negative pressure pump is installed on the recovery pipeline;

[0020] The filter membrane has multiple layers arranged sequentially along the air inlet direction and towards the air outlet direction of the tank, and the diameter of the filter pores of the filter membrane decreases sequentially along the air inlet direction and towards the air outlet direction.

[0021] Optionally, the pressure tank and the refrigerator are connected via a sleeve assembly.

[0022] Optionally, the sleeve assembly includes:

[0023] A spiral-shaped connecting pipe has one end connected to the pressure tank and the other end connected to the refrigerator. Several protrusions are provided on the inner wall of the connecting pipe.

[0024] A sleeve is fitted over the outside of the connecting pipe, and the sleeve is connected to the liquid nitrogen storage device.

[0025] Optionally, the connecting pipe is made of aluminum and the sidewall of the aluminum pipe has a silver plating layer.

[0026] Optionally, a temperature sensor and a flow regulating valve are installed on the pipeline connecting the cooler and the liquid nitrogen storage device.

[0027] Optionally, the recycling device further includes:

[0028] A pressure relief valve is connected to the pressure tank.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] 1. Used nitrogen is recovered and processed through a recycling tank, reducing refrigeration costs.

[0031] 2. Before using used nitrogen for cooling, heat exchange can be performed using liquid nitrogen that needs to be reheated, thereby reducing recycling costs. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the overall structure of the refrigerant recovery device.

[0034] Figure 2 This is a schematic diagram of the sterilization device in a refrigerant recovery unit.

[0035] Figure 3 This is a schematic diagram of the cross-sectional structure of the connecting pipe of the refrigerant recovery device.

[0036] Figure label:

[0037] 1. Recycling tank; 11. Recycling pipeline; 12. Tank body; 13. Negative pressure pump; 14. Filter membrane;

[0038] 2. Disinfection device; 21. Conveying pipeline; 22. Mounting plate; 23. Nitrogen channel; 24. Ultraviolet lamp; 25. Drainage assembly;

[0039] 3. Pressure tank;

[0040] 4. Refrigerator;

[0041] 5. Sleeve assembly; 51. Connecting pipe; 52. Protrusion; 53. Sleeve; 54. Silver plating;

[0042] 6. Temperature sensor;

[0043] 7. Flow regulating valve;

[0044] 8. Pressure relief valve. Detailed Implementation

[0045] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0046] In the description of this utility model, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0050] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0051] like Figure 1As shown, this embodiment of the present invention provides a refrigerant recovery device, including: a recovery tank 1, a sterilization device 2, a pressure tank 3, and a refrigerator 4. One end of the recovery tank 1 is connected to an external refrigeration unit. One end of the sterilization device 2 is connected to the recovery tank 1, and the other end is connected to the pressure tank 3. The inlet end of the refrigerator 4 is connected to the pressure tank 3, and the outlet end is connected to a liquid nitrogen storage device.

[0052] During use, the used nitrogen gas is drawn into the recovery tank 1 from the external refrigeration equipment, and then sterilized by the sterilization device 2 connected to the recovery tank 1. The sterilized nitrogen gas then enters the pressure tank 3 for pressurization and finally undergoes heat exchange, thus recovering the used nitrogen gas.

[0053] It needs to be explained that the appendix Figure 1-3 The arrows indicate the direction of liquid nitrogen flow. The pressurization tank and cooler 4 in this embodiment are existing technologies, and their specific structures and working principles will not be described in detail here.

[0054] More specifically, such as Figure 1 and Figure 2 As shown, the disinfection device 2 includes: a conveying pipe 21, a mounting plate 22, an ultraviolet lamp 24, and a drainage assembly 25. One end of the conveying pipe 21 is connected to the recovery tank 1, and the other end is connected to the pressure tank 3. Multiple mounting plates 22 are arranged along the axial direction of the conveying pipe 21. After installation, the mounting plates 22 are eccentrically positioned with respect to the conveying pipe 21, forming a nitrogen channel 23 between the mounting plate 22 and the inner wall of the conveying pipe 21. Adjacent nitrogen channels 23 are arranged opposite to each other. The ultraviolet lamp 24 is installed on the opposite sidewall of the mounting plate 22. One end of the drainage assembly 25 is connected to the conveying pipe 21.

[0055] After the used nitrogen enters the delivery pipe 21, it comes into contact with the mounting plate 22 along the axis of the delivery pipe 21, and condenses once during the contact process. The condensed liquid is discharged through the drain assembly 25 connected to the delivery pipe 21. The nitrogen is then sterilized by the ultraviolet lamp 24 installed on the mounting plate 22 in the delivery pipe 21, and the sterilized nitrogen is pressurized in the pressure tank 3.

[0056] It should be noted that the drainage component 25 includes a drain pipe and a drain valve. When the liquid in the drain pipe accumulates to a certain amount, the drain valve can be controlled by the controller to drain the liquid.

[0057] In one embodiment, such as Figure 1As shown, the recycling tank 1 includes: a recycling pipe 11, a tank body 12, a negative pressure pump 13, and a filter membrane 14. One end of the recycling pipe 11 is connected to an external refrigeration unit, and the other end is connected to the tank body 12. The negative pressure pump 13 is installed on the recycling pipe 11. The filter membrane 14 has multiple layers arranged along the air inlet direction and towards the air outlet direction of the tank body 12, and the filter pores of the filter membrane 14 decrease in size sequentially along the air inlet direction and towards the air outlet direction.

[0058] During nitrogen recovery, the negative pressure pump 13 operates to draw nitrogen discharged from the external refrigeration equipment into the tank 12. The nitrogen then passes through multiple layers of filtration in the tank 12 before entering the disinfection device 2 for treatment.

[0059] Since nitrogen generates heat during use, to prevent a large amount of heat from entering the sterilization device 2 after entering the tank 12, multiple layers of filter membranes 14 are installed inside the tank 12. During the process of the recovered nitrogen passing through the filter membranes 14, some water will remain inside the tank 12.

[0060] It should be noted that the filter membrane 14 is an air-nitrogen filter membrane 14, which can effectively remove impurity particles and harmful gases from nitrogen, thereby improving the purity and cleanliness of nitrogen.

[0061] In one embodiment, such as Figure 1 As shown, the pressure tank 3 and the cooler 4 are connected by a sleeve 53 assembly 5.

[0062] More specifically, such as Figure 1 and Figure 3 As shown, the sleeve assembly 53 includes a spiral connecting pipe 51 and a sleeve 53. One end of the connecting pipe 51 is connected to the pressure tank 3, and the other end is connected to the cooler 4. Several protrusions 52 are provided on the inner wall of the connecting pipe 51. The sleeve 53 is fitted over the outside of the connecting pipe 51 and is connected to the liquid nitrogen storage device.

[0063] When the nitrogen gas coming out of the pressure tank 3 enters the connecting pipe 51, it exchanges heat with the low-temperature medium in the sleeve 53, which can reduce the energy consumption of the cooler 4.

[0064] It should be noted that the liquid nitrogen in the liquid nitrogen storage device needs to be heated before use according to requirements. Therefore, it can be sent into the sleeve 53 for heat exchange. The heated medium then enters the nitrogen reheating device for reheating.

[0065] In one embodiment, such as Figure 1 and Figure 3 As shown, in order to improve heat exchange efficiency, the connecting pipe 51 is made of aluminum, and the side wall of the aluminum pipe has a silver plating layer 54.

[0066] In one embodiment, such as Figure 1 As shown, in order to prevent liquid nitrogen from being discharged before the required temperature is reached, a temperature sensor 6 and a flow regulating valve 7 are installed on the pipe connecting the cooler 4 and the liquid nitrogen storage equipment.

[0067] Temperature sensor 6 monitors the liquid nitrogen temperature inside cooler 4 in real time, and then feeds the information back to the controller. The controller controls the flow regulating valve 7 to start and stop, so as to achieve automatic nitrogen delivery.

[0068] In one embodiment, such as Figure 1 As shown, in order to improve the safety performance of the recycling device, the recycling device further includes: a pressure relief valve 8, which is connected to the pressure tank 3.

[0069] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A refrigerant recovery device, characterized in that, include: The recycling tank is connected at one end to external refrigeration equipment; The disinfection device is connected to the recycling tank; A pressure tank, connected to the disinfection device; The refrigerator has its inlet end connected to the pressure tank and its outlet end connected to the liquid nitrogen storage device. The disinfection device includes: The conveying pipeline is connected at one end to the recycling tank and at the other end to the pressure tank; Mounting plates are provided along the axial direction of the conveying pipeline. After installation, the mounting plates are eccentrically positioned with respect to the conveying pipeline, so that a nitrogen channel is formed between the mounting plates and the inner wall of the conveying pipeline, and two adjacent nitrogen channels are positioned opposite each other. Ultraviolet lamps are installed on opposite sidewalls of each of the mounting plates; A drainage component, one end of which is connected to the delivery pipe.

2. The refrigerant recovery device according to claim 1, characterized in that, The recycling tank includes: The recovery pipe is connected at one end to an external refrigeration unit. The tank is connected to the other end of the recycling pipeline, and the disinfection device is connected to the tank; A negative pressure pump is installed on the recovery pipeline; The filter membrane has multiple layers arranged sequentially along the air inlet direction and towards the air outlet direction of the tank, and the diameter of the filter pores of the filter membrane decreases sequentially along the air inlet direction and towards the air outlet direction.

3. The refrigerant recovery device according to claim 1 or 2, characterized in that, The pressure tank and the refrigerator are connected by a sleeve assembly.

4. The refrigerant recovery device according to claim 3, characterized in that, The sleeve assembly includes: A spiral-shaped connecting pipe has one end connected to the pressure tank and the other end connected to the refrigerator. Several protrusions are provided on the inner wall of the connecting pipe. A sleeve is fitted over the outside of the connecting pipe, and the sleeve is connected to the liquid nitrogen storage device.

5. The refrigerant recovery device according to claim 4, characterized in that, The connecting pipe is made of aluminum and has a silver-plated layer on its sidewall.

6. The refrigerant recovery device according to claim 1, characterized in that, A temperature sensor and a flow regulating valve are installed on the pipeline connecting the cooler and the liquid nitrogen storage device.

7. The refrigerant recovery device according to claim 1, characterized in that, The recycling device further includes: A pressure relief valve is connected to the pressure tank.

Images