Programmed temperature controller liquid nitrogen recovery device

Abstract

The utility model discloses a program cooling instrument liquid nitrogen recovery unit, including storage tank, recovery component and resistance flow component, storage tank sets up at one side of instrument body, recovery component is by recovery subassembly and pumping subassembly constitutes, recovery subassembly sets up between storage tank and instrument body, pumping subassembly sets up at one side of instrument body, and its working end is connected with recovery subassembly, resistance flow component sets up on recovery component, the utility model discloses, through the work of recovery component, pumping subassembly drives gaseous liquid nitrogen in instrument body to flow into recovery subassembly, and resistance flow component prevents gaseous liquid nitrogen in storage tank and recovery component from pouring back instrument body, thereby making gaseous liquid nitrogen one -way flow, to make gaseous liquid nitrogen flow into storage tank and store, so as to make it recondense as liquid nitrogen for subsequent condensation processing of gaseous liquid nitrogen unification, reduce the waste of liquid nitrogen resources.

Description

Technical Field

[0001] This utility model relates to the field of programmed cooling technology, and in particular to a liquid nitrogen recovery device for programmed cooling. Background Technology

[0002] A programmed cooling system is a device that precisely controls the cooling rate and temperature gradient through a preset program. Its core function is to provide a stable and controllable low-temperature environment for biological samples, industrial materials, or experimental environments, avoiding sample damage caused by sudden temperature changes. It has important applications in medical, scientific research, and industrial fields.

[0003] When the programmed cooling apparatus is working, liquid nitrogen is continuously injected into the cooling chamber to maintain a low temperature environment. However, as the cooling process progresses, some of the liquid nitrogen in the chamber will vaporize due to absorbing heat. Most of this vaporized liquid nitrogen is directly discharged into the external environment, which increases the waste of liquid nitrogen resources and thus increases the experimental cost. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned shortcomings by providing a liquid nitrogen recovery device for a programmed cooling system, enabling the recovery of vaporized nitrogen.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a liquid nitrogen recovery device for a programmed cooling instrument, comprising a storage tank and a recovery component for connecting the storage tank and the instrument body;

[0006] The recovery component consists of a recovery assembly and a pumping assembly;

[0007] The recovery component is disposed between the storage tank and the instrument body, and is used to transport gaseous liquid nitrogen into the storage tank;

[0008] The pumping component is located on one side of the instrument body, and its working end is connected to the recovery component to provide a driving force for conveying gaseous liquid nitrogen.

[0009] Furthermore, the recycling assembly includes a conveying bin, a conveying pipe, and a first output pipe;

[0010] The delivery chamber is located on one side of the instrument body;

[0011] The delivery pipe is disposed between the delivery chamber and the instrument body, and is used to deliver gaseous liquid nitrogen in the instrument body to the delivery chamber;

[0012] The first output pipe is disposed between the delivery chamber and the storage tank, and is used to deliver gaseous liquid nitrogen in the delivery chamber to the storage tank.

[0013] Furthermore, the pumping assembly includes a pusher plate that is slidably disposed within the inner cavity of the conveying chamber;

[0014] The pusher plate divides the inner cavity of the conveying chamber into a first conveying chamber and a second conveying chamber; the conveying pipe has two air inlets, each of which is connected to a corresponding conveying chamber.

[0015] The recycling component also includes a second output pipe disposed between the second conveying chamber and the storage tank.

[0016] Furthermore, the pumping assembly also includes a pumping unit;

[0017] The pumping unit is located on one side of the instrument body, and its moving end extends into the delivery chamber and is connected to the push plate. The pumping unit is used to drive the push plate to move back and forth in its inner cavity along the setting direction of the delivery chamber, so as to squeeze the gaseous liquid nitrogen in the delivery chamber.

[0018] Furthermore, the recovery component is also provided with a flow-blocking component, which includes one-way valves respectively installed on each gas inlet and each outlet pipe;

[0019] Each of the one-way valves installed on each of the gas inlets is used to guide gaseous liquid nitrogen into the corresponding delivery chamber and block its reverse flow.

[0020] The one-way valves installed on the first output pipe and the second output pipe are used to direct the gaseous liquid nitrogen in the corresponding delivery chamber to the storage tank and prevent the gaseous liquid nitrogen from flowing back to the delivery chamber.

[0021] The beneficial effects of this utility model are reflected in:

[0022] This invention utilizes a recovery component to draw gaseous liquid nitrogen from the instrument body into the recovery component. Simultaneously, a flow-blocking component prevents the gaseous liquid nitrogen in the storage tank and recovery component from flowing back into the instrument body, thus enabling unidirectional flow of gaseous liquid nitrogen. This allows the gaseous liquid nitrogen to flow into the storage tank for storage, facilitating subsequent condensation processing to re-condense it into liquid nitrogen and reducing the waste of liquid nitrogen resources. Attached Figure Description

[0023] Figure 1 This is a perspective view of the liquid nitrogen recovery device of the programmed cooling instrument described in this utility model;

[0024] Figure 2 This is a cross-sectional view of the liquid nitrogen recovery device of the programmed cooling instrument described in this utility model;

[0025] Figure 3 for Figure 2 A magnified view of point A in the middle.

[0026] In the picture:

[0027] 01. Instrument body; 1. Storage tank; 2. Recovery component; 21. Recovery assembly; 211. Conveying chamber; 2111. First conveying chamber; 2112. Second conveying chamber; 212. Conveying pipe; 2121. Gas inlet; 213. First output pipe; 22. Pumping assembly; 221. Pumping unit; 222. Push plate; 23. Second output pipe; 3. Flow obstruction component; 31. One-way valve; 4. Detection unit. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0029] Please see Figures 1-3 This utility model discloses a liquid nitrogen recovery device for a programmed cooling instrument, including a storage tank 1 and a recovery component 2 for connecting the storage tank 1 and the instrument body 01;

[0030] This storage tank 1 is used to store gaseous liquid nitrogen;

[0031] The recycling component 2 consists of a recycling assembly 21 and a pumping assembly 22.

[0032] The recovery component 21 is located between the storage tank 1 and the instrument body 01, and is used to transport gaseous liquid nitrogen into the storage tank 1;

[0033] The pumping component 22 is located on one side of the instrument body 01, and its working end is connected to the recovery component 21 to provide driving force for conveying gaseous liquid nitrogen.

[0034] In practice, when it is necessary to recover the gaseous liquid nitrogen in the instrument body 01, the pumping component 22 works and pumps the gaseous liquid nitrogen in the instrument body 01 into the recovery component 21. Then the gaseous liquid nitrogen enters the storage tank 1 through the recovery component 21.

[0035] In this invention, through the operation of the recovery component 2, the pumping component 22 drives the gaseous liquid nitrogen in the instrument body 01 to flow into the recovery component 21. Subsequently, the recovery component 21 causes the gaseous liquid nitrogen to flow into the storage tank 1 for storage, so that the gaseous liquid nitrogen can be uniformly condensed and processed to re-condense into liquid nitrogen, thereby reducing the waste of liquid nitrogen resources.

[0036] In one embodiment, the recovery component 21 includes a delivery chamber 211 disposed on one side of the instrument body 01, which has an inner cavity. The working end of the pumping component 22 is disposed in the inner cavity of the delivery chamber 211 for pumping gaseous liquid nitrogen into the delivery chamber 211.

[0037] A delivery pipe 212 is provided between the delivery chamber 211 and the instrument body 01. Its inlet is connected to the cooling chamber of the instrument body 01, and its outlet is connected to the delivery chamber 211. The delivery pipe 212 is used to deliver gaseous liquid nitrogen in the instrument body 01 to the delivery chamber 211.

[0038] A first output pipe 213 is also provided between the conveying chamber 211 and the storage tank 1 for conveying gaseous liquid nitrogen in the conveying chamber 211 to the storage tank 1.

[0039] With this design, when gaseous liquid nitrogen needs to be recovered, the pumping component 22 operates and pumps the gaseous liquid nitrogen in the instrument body 01 into the delivery chamber 211 through the delivery pipe 212. Then, the pumping component 22 applies pressure to the gaseous liquid nitrogen so that it flows into the storage tank 1.

[0040] In one embodiment, the pumping assembly 22 includes a pusher plate 222 slidably disposed in the inner cavity of the conveying chamber 211;

[0041] The push plate 222 divides the inner cavity of the conveying chamber 211 into a first conveying chamber 2111 and a second conveying chamber 2112; the conveying pipe 212 has two air inlets 2121, and each air inlet 2121 is connected to the corresponding conveying chamber.

[0042] The recycling component 2 also includes a second output pipe 23 disposed between the conveying chamber 211 and the storage tank 1, with the two ends of the second output pipe 23 connected to the second conveying chamber 2112 and the storage tank 1, respectively.

[0043] With this design, when the pusher plate 222 moves toward the first conveying chamber 2111 in the inner cavity of the conveying chamber 211, the pusher plate 222 squeezes the gaseous liquid nitrogen in the first conveying chamber 2111 and causes it to flow into the storage tank 1 through the first conveying pipe 212. At the same time, a negative pressure is generated in the second conveying chamber 2112, causing the gaseous liquid nitrogen in the instrument body 01 to enter the second conveying chamber 2112 through the corresponding gas inlet 2121.

[0044] Subsequently, when the pusher plate 222 moves toward the second conveying chamber 2112, the pusher plate 222 squeezes the gaseous liquid nitrogen in the second conveying chamber 2112, so that it flows into the storage tank 1 through the second output pipe 23. At the same time, a negative pressure is generated in the first conveying chamber 2111 and gaseous liquid nitrogen is drawn in again.

[0045] This ensures that the pusher plate 222 can always drive gaseous liquid nitrogen into the storage tank 1 during its reciprocating movement, thereby improving the recovery efficiency.

[0046] In one embodiment, the pumping assembly 22 further includes a pumping unit 221 disposed on one side of the instrument body 01. The moving end of the pumping unit 221 extends into the delivery chamber 211 and is connected to the push plate 222. The push plate 222 is dynamically sealed to the inner cavity of the delivery chamber 211. The pumping unit 221 is used to drive the push plate 222 to reciprocate within the inner cavity of the delivery chamber 211 along the setting direction of the delivery chamber 211, so as to squeeze the gaseous liquid nitrogen in the delivery chamber 211.

[0047] With this design, when gaseous liquid nitrogen needs to be recovered, the pumping unit 221 drives the pusher plate 222 to move back and forth in the conveying chamber 211, so that the pusher plate 222 makes periodic piston movements in the conveying chamber 211 and repeatedly squeezes the gaseous liquid nitrogen in the first conveying chamber 2111 and the second conveying chamber 2112 in sequence, thereby conveying the gaseous liquid nitrogen in the first conveying chamber 2111 and the second conveying chamber 2112 to the storage tank 1.

[0048] Preferably, the pumping unit 221 can be a cylinder from the prior art.

[0049] In one embodiment, the recovery component 2 is further provided with a flow-blocking component 3, which includes a one-way valve 31 respectively disposed on each gas inlet 2121 and each output pipe. The one-way valve 31 on each gas inlet 2121 directs the gaseous liquid nitrogen into the corresponding delivery chamber and blocks its reverse flow.

[0050] The one-way valve 31 on the first output pipe 213 and the second output pipe 23 directs the gaseous liquid nitrogen into the storage tank 1 and blocks its backflow to the delivery chamber 211.

[0051] With this design, when the pumping component 22 is working, gaseous liquid nitrogen enters the corresponding conveying chamber through the one-way valves 31 on each gas outlet 2121 of the conveying pipe 212. When the push plate 222 squeezes the gaseous liquid nitrogen in the conveying chamber 211, the one-way valves 31 on the conveying pipe 212 prevent the gaseous liquid nitrogen from flowing back into the instrument body 01 through the conveying pipe 212, so that the gaseous liquid nitrogen flows unidirectionally into the storage tank 1. When the push plate 222 works and generates negative pressure in the conveying chamber 211, the one-way valves 31 on the first output pipe 213 and the second output pipe 23 prevent the gaseous liquid nitrogen in the storage tank 1 from flowing back into the conveying chamber 211.

[0052] In one embodiment, the storage tank 1 is detachably connected to the first delivery pipe 212 and the second delivery pipe 212, respectively.

[0053] The storage tank 1 is also equipped with a detection unit 4, the detection end of which extends into the storage tank 1 to detect the pressure inside the tank.

[0054] With this design, when gaseous liquid nitrogen enters storage tank 1, the detection unit 4 monitors the pressure inside the tank to determine the amount of gas stored in storage tank 1. When the detection unit 4 detects that the pressure inside the pipe reaches a predetermined value, storage tank 1 is full of gaseous liquid nitrogen, and staff need to replace storage tank 1.

[0055] Preferably, the detection unit 4 can be a pressure sensor from the prior art.

[0056] It should be noted that when replacing storage tank 1, the one-way valves 31 on the first delivery pipe 212 and the second delivery pipe 212 can prevent the gaseous liquid nitrogen in the recovery component 2 from overflowing, and valves are provided at the connection between storage tank 1 and each delivery pipe 212 to prevent gas from overflowing from the tank.

[0057] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0058] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0059] Additionally, "multiple" refers to two or more.

[0060] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A liquid nitrogen recovery device for a programmed cooling system, characterized in that, Includes a storage tank (1) and a recovery component (2) for connecting the storage tank (1) to the instrument body (01); The recovery component (2) consists of a recovery assembly (21) and a pumping assembly (22); The recovery component (21) is disposed between the storage tank (1) and the instrument body (01) for conveying gaseous liquid nitrogen into the storage tank (1); The pumping component (22) is located on one side of the instrument body (01), and its working end is connected to the recovery component (21) to provide a driving force for conveying gaseous liquid nitrogen; The recycling component (21) includes a conveying bin (211), a conveying pipe (212), and a first output pipe (213); The delivery chamber (211) is located on one side of the instrument body (01); The delivery pipe (212) is disposed between the delivery chamber (211) and the instrument body (01) for delivering gaseous liquid nitrogen in the instrument body (01) to the delivery chamber (211); The first output pipe (213) is disposed between the conveying chamber (211) and the storage tank (1) for conveying gaseous liquid nitrogen in the conveying chamber (211) to the storage tank (1); The pumping assembly (22) includes a pusher plate (222) that is slidably disposed in the inner cavity of the conveying chamber (211); The push plate (222) divides the inner cavity of the conveying chamber (211) into a first conveying chamber (2111) and a second conveying chamber (2112); the conveying pipe (212) has two air inlets (2121), each air inlet (2121) being connected to the corresponding conveying chamber. The recycling component (2) also includes a second output pipe (23) disposed between the second conveying chamber (2112) and the storage tank (1).

2. The liquid nitrogen recovery device for a programmed cooling system according to claim 1, characterized in that: The pumping assembly (22) further includes a pumping unit (221); The pumping unit (221) is located on one side of the instrument body (01), and its moving end extends into the delivery chamber (211) and is connected to the push plate (222). The pumping unit (221) is used to drive the push plate (222) to move back and forth in its inner cavity along the setting direction of the delivery chamber (211) to squeeze the gaseous liquid nitrogen in the delivery chamber (211).

3. The liquid nitrogen recovery device for a programmed cooling system according to claim 1, characterized in that: The recovery component (2) is also provided with a flow-blocking component (3), which includes a one-way valve (31) respectively installed on each of the gas inlets (2121) and each output pipe; The one-way valve (31) installed on each of the gas inlets (2121) is used to guide gaseous liquid nitrogen into the corresponding delivery chamber and block its reverse flow; Each of the one-way valves (31) respectively installed on the first output pipe (213) and the second output pipe (23) is used to guide the gaseous liquid nitrogen in the corresponding delivery chamber to the storage tank (1) and block the gaseous liquid nitrogen from flowing back to the delivery chamber (211).

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