Low-temperature circulating pump

Abstract

The utility model relates to the technical field of low-temperature circulating pumps, and discloses a low-temperature circulating pump which comprises a pump case provided with a cold bath cavity and a control panel, and a circulating heat dissipation part is further arranged in the pump case and used for rapidly dissipating heat released by the low-temperature circulating pump in the compression process. The side wall of the pump case is provided with at least one cooling fan right facing the circulating cooling part, and the outer side wall of the pump case is provided with two outer circulating pipe joints which are used for being communicated with a heat exchange coil penetrating through the circulating cooling part to form circulation. Compared with the surrounding contact design in the prior art, the contact area of the two heat exchange parts is fully increased through the silicone grease fluid with good heat exchange performance, welding fixation is not needed, and the assembly process is simpler.

Description

Technical Field

[0001] The utility model relates to the technical field of cryogenic circulation pumps, especially cryogenic circulation pumps. Background Art

[0002] A cryogenic coolant circulation pump is a cryogenic liquid circulation device that uses mechanical refrigeration and has the functions of providing cryogenic liquid and cryogenic water bath. Combined with instruments such as a rotary evaporator, a vacuum freeze dryer, a circulating water vacuum pump, and a magnetic stirrer, it can perform multifunctional chemical reactions and drug storage at low temperatures.

[0003] The publication number CN220669901U discloses a cryogenic coolant circulation pump, specifically related to the technical field of cryogenic coolant circulation pumps. It includes a box body. One side of the top of the box body is provided with a liquid tank. The top of the front of the box body is provided with a control panel. The front of the box body and below the control panel is provided with a heat dissipation grille opening. A heat dissipation mechanism is fixedly installed at the bottom of both side surfaces of the box body. This cryogenic coolant circulation pump can effectively export the heat accumulated inside the pump body of the circulation pump through a plurality of heat conduction columns, and cooperate with a heat dissipation fan to discharge the heat exported by the heat conduction columns, and can quickly dissipate the heat generated inside the circulation pump. At the same time, in order to enable the heat conduction columns to continuously export the heat inside the box body, cold water can be introduced into the condensation pipeline. The flowing cold water in the condensation pipeline can take away the heat at the outer end of the heat conduction column, so that the outer end of the heat conduction column can always be in a lower temperature range and continuously export heat;

[0004] However, the winding structure of its heat conduction column and the condensation pipeline needs to be welded to ensure good contact between the two and thus achieve a good heat exchange effect. Such welding work is very large, and the welding material will greatly reduce its heat exchange efficiency, resulting in a significant reduction in its heat dissipation effect. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is: In order to overcome the problems existing above, a cryogenic circulation pump is provided, which solves the above problems.

[0006] The utility model solves its technical problems by adopting the following technical solutions:

[0007] A cryogenic circulation pump includes a pump chassis with a cold bath cavity and a control panel. A circulation heat dissipation part is further arranged inside the pump chassis to quickly dissipate the heat released during the compression process of the cryogenic circulation pump. At least one heat dissipation fan facing the circulation heat dissipation part is arranged on the side wall of the pump chassis. Two external circulation pipe joints are arranged on the outer side wall of the pump chassis and are respectively used to connect with a heat exchange coil passing through the circulation heat dissipation part to form a circulation.

[0008] Preferably, a hollow heat exchange box is fixedly arranged in the pump chassis. A copper heat exchange coil is arranged in the heat exchange box. Both ends of the heat exchange coil are respectively connected to a heat exchange coil inlet and a heat exchange coil outlet fixed on the heat exchange box. The heat exchange coil inlet is connected in series with the compressor through a pipeline and then communicated with one of the external circulation pipe joints. The external circulation pipe joints are communicated with each other through an external condenser pipe and are communicated with the heat exchange coil outlet to form a loop.

[0009] Preferably, silicone grease is filled in the heat exchange box. The silicone grease completely covers the heat exchange coil, effectively increasing the contact area and enhancing the heat exchange efficiency.

[0010] Preferably, in order to shorten the start-up preheating time and highlight the excellent performance of the device, a peristaltic pump is fixedly arranged on the heat exchange box. The peristaltic pump is communicated with both ends of the heat exchange box through a circulation hose. Under the action of the peristaltic pump, the silicone grease in the heat exchange box can perform unidirectional circulating flow. In this way, after starting up, with the auxiliary drive of the peristaltic pump, the silicone grease can flow sufficiently quickly, thereby accelerating the rapid heat transfer.

[0011] Preferably, a number of heat dissipation fins are fixedly arranged at intervals in the heat exchange box. The heat dissipation fins are made of copper sheets with galvanized surfaces. The lower ends of the heat dissipation fins extend downward to form spaced fins. After the heat dissipation fan is started, the wind is blown towards the heat dissipation fins and passes through the gaps between them to take away the heat.

[0012] Preferably, a dust-proof and safety protection cover plate is fixedly arranged on the pump chassis outside the heat dissipation fan through bolts for dust prevention and safety protection. On the pump chassis on the opposite side of the heat dissipation fan, there is a heat dissipation air port communicated with the inner cavity of the pump chassis.

[0013] The advantages and positive effects of the present utility model are as follows: The condensed medium after the compressor works circulates in the heat exchange coil inlet, the heat exchange coil, the heat exchange coil outlet, the external circulation pipe joints and the condenser pipe connecting the external circulation pipe joints. The heat is transferred to the silicone grease in the heat exchange box and then transferred to the low-temperature area (the lower end of the heat dissipation fins). Under the action of the heat dissipation fan, the air dissipates heat. Compared with the surrounding contact design of the prior art, the device of the present utility model fully improves the contact area between the two heat exchange components through the silicone grease fluid with good heat exchange performance, and there is no need for welding and fixing, and the assembly process is simpler. In addition, in order to make full use of the heat capacity of the silicone grease, after starting up, the peristaltic pump is used to make the silicone grease flow, accelerating the heat transfer and avoiding local overheating, so that the cooling speed of the device is faster. Description of the Drawings

[0014] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0015] Figure 1 is a schematic structural view of the present utility model;

[0016] Figure 2 is a schematic structural view of the present utility model;

[0017] Figure 3 is a schematic structural view of the heat dissipation fins in the present utility model.

[0018] The markings in the attached drawings are described separately as follows: 10, control panel; 11, pump chassis; 12, heat dissipation air port; 13, external circulation pipe joint; 14, cold bath cavity; 15, dust-proof and protective cover plate; 16, heat dissipation fan; 17, peristaltic pump; 18, circulation hose; 19, heat exchange coil inlet; 20, heat exchange coil outlet; 21, heat dissipation fins; 22, heat exchange box. Specific embodiments

[0019] Now, the present utility model will be further described in detail with reference to the attached drawings. These attached drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present utility model in a schematic way, so they only show the components related to the present utility model. The following is a further detailed description of the embodiments of the present utility model with reference to the attached drawings:

[0020] As Figures 1-3 shown, the low-temperature circulation pump described in the present utility model includes a pump chassis 11 with a cold bath cavity 14 and a control panel 10. A circulation heat dissipation part is further provided in the pump chassis 11 for quickly dissipating the heat released during the compression process of the low-temperature circulation pump. At least one heat dissipation fan 16 facing the circulation heat dissipation part is provided on the side wall of the pump chassis 11. Two external circulation pipe joints 13 are provided on the outer side wall of the pump chassis 11 and are respectively used to connect with a heat exchange coil passing through the circulation heat dissipation part to form a circulation.

[0021] Preferably, a hollow heat exchange box 22 is fixedly provided in the pump chassis 11. A copper heat exchange coil is provided in the heat exchange box 22, and both ends of the heat exchange coil are respectively connected to a heat exchange coil inlet 19 and a heat exchange coil outlet 20 fixed on the heat exchange box 22. The heat exchange coil inlet 19 is connected in series with a compressor through a pipeline and is communicated with one of the external circulation pipe joints 13, and the external circulation pipe joints 13 are communicated with each other through an external condensing pipe and are communicated with the heat exchange coil outlet 20 to form a loop.

[0022] Preferably, silicone grease is filled in the heat exchange box 22, and the silicone grease completely covers the heat exchange coil, effectively increasing the contact area and the heat exchange efficiency.

[0023] Preferably, in order to shorten the start-up preheating time and highlight the excellent performance of the device, a peristaltic pump 17 is fixedly arranged on the heat exchange box 22. The peristaltic pump 17 is communicated with both ends of the heat exchange box 22 through a circulation hose 18. Under the action of the peristaltic pump 17, the silicone grease in the heat exchange box 22 can perform unidirectional circulating flow. In this way, after starting up, through the auxiliary drive of the peristaltic pump 17, the silicone grease can flow sufficiently quickly, thereby accelerating the rapid heat transfer.

[0024] Preferably, a plurality of heat dissipation fins 21 are fixedly arranged at intervals in the heat exchange box 22. The heat dissipation fins 21 are made of copper sheets with galvanized surfaces. The lower ends of the heat dissipation fins 21 extend downward to form spaced fins. After the heat dissipation fan 16 is started, the wind is blown towards the heat dissipation fins 21 and passes through the gaps between them to take away the heat.

[0025] Preferably, a dust-proof and safety protection cover plate 15 is fixedly arranged on the pump case 11 outside the heat dissipation fan 16 through bolts for dust prevention and safety protection. And a heat dissipation air port 12 communicating with the inner cavity of the pump case 11 is arranged on the pump case 11 on the opposite side of the heat dissipation fan 16.

[0026] During specific implementation, the condensed medium after the compressor works circulates in the heat exchange coil inlet 19, the heat exchange coil, the heat exchange coil outlet 20, the external circulation pipe joint 13 and the condensate pipe connecting the external circulation pipe joint 13. The heat is transferred to the silicone grease in the heat exchange box 22 and then transferred to the low-temperature area (the lower ends of the heat dissipation fins 21). Under the action of the heat dissipation fan 16, the air dissipates heat. Compared with the surrounding contact design of the prior art, the device fully improves the contact area between the two heat exchange components through the silicone grease fluid with good heat exchange performance, and there is no need for welding and fixing, and the assembly process is simpler. In addition, in order to make full use of the heat capacity of the silicone grease, after starting up, the peristaltic pump 17 is used to make the silicone grease flow, accelerating heat transfer and avoiding local overheating, so that the cooling speed of the device is faster.

[0027] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific implementation manners. Any other implementation manners obtained by those skilled in the art according to the technical solutions of the present invention also belong to the scope of protection of the present invention.

Claims

1. A cryogenic circulation pump, comprising a pump case (11) having a cold bath chamber (14) and a control panel (10), wherein a circulating heat dissipation unit is provided in the pump case (11) for quickly dissipating heat released by the cryogenic circulation pump during a compression process, and characterized in that: At least one cooling fan (16) is provided on the side wall of the pump case (11) facing the circulating cooling part, and two external circulation pipe joints (13) are provided on the outer side wall of the pump case (11) for connecting to heat exchange coils passing through the circulating cooling part to form circulation.

2. The cryogenic circulating pump according to claim 1, characterized in that: A hollow heat exchange box (22) is fixedly arranged in the pump case (11), a copper heat exchange coil is arranged in the heat exchange box (22), and two ends of the heat exchange coil are respectively connected to a heat exchange coil inlet (19) and a heat exchange coil outlet (20) fixed on the heat exchange box (22), the heat exchange coil inlet (19) is connected in series with the compressor through a pipeline and then communicated with one of the external circulation pipe joints (13), and the external circulation pipe joints (13) are connected to each other through an external condensing pipe and are connected to the heat exchange coil outlet (20) to form a loop.

3. The cryogenic circulation pump according to claim 2, characterized in that: The heat exchange box (22) is filled with silicone grease, which completely covers the heat exchange coil, effectively increasing the contact area and improving the heat exchange efficiency.

4. The cryogenic circulation pump according to claim 3, characterized in that: In order to shorten the preheating time after startup and highlight the excellent performance of the device, a peristaltic pump (17) is fixedly provided on the heat exchange box (22). The peristaltic pump (17) is connected to both ends of the heat exchange box (22) through a circulation hose (18). Under the action of the peristaltic pump (17), the silicone grease in the heat exchange box (22) can circulate in one direction. In this way, after startup, the silicone grease can be fully circulated through the auxiliary drive of the peristaltic pump (17), thereby accelerating the rapid transfer of heat.

5. The cryogenic circulation pump according to claim 4, characterized in that: A plurality of heat dissipation fins (21) are fixedly arranged at intervals in the heat exchange box (22); the heat dissipation fins (21) are made of copper sheets with a galvanized surface; the lower ends of the heat dissipation fins (21) extend downward to form spaced fins; when the heat dissipation fan (16) is started, air is blown toward the heat dissipation fins (21) and passes through the gaps between the fins to remove heat.

6. The cryogenic circulation pump according to claim 5, characterized in that: A dustproof protective cover plate (15) is fixed by bolts on the outer side of the cooling fan (16) on the pump case (11) for dust prevention and safety protection, and a heat dissipation air port (12) communicating with the inner cavity of the pump case (11) is provided on the pump case (11) on the opposite side of the cooling fan (16).

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