Mild hypothermia circulation device

Abstract

The utility model provides a mild hypothermia circulating device which comprises a liquid storage tank, an electromagnetic valve module and a temperature adjusting assembly. Wherein circulating liquid is stored in the liquid storage tank, and the liquid storage tank is provided with an overflow port communicated with the external atmosphere and used for discharging air in the liquid storage tank; the electromagnetic valve module has an exhaust state in which the electromagnetic valve module is communicated with the liquid storage tank and a temperature adjusting state in which the electromagnetic valve module is disconnected from the liquid storage tank; the temperature adjusting assembly comprises a power source and a heat exchange module, when the electromagnetic valve module is in an exhaust state, the liquid storage tank, the electromagnetic valve module, the power source and the heat exchange module are connected to form a closed exhaust loop, and when the electromagnetic valve module is in a temperature adjusting state, the electromagnetic valve module, the power source and the heat exchange module are connected to form a closed temperature adjusting loop. The power source is used for driving the circulating liquid to flow in the exhaust loop or the temperature adjusting loop, and the heat exchange module is used for guiding out heat of the circulating liquid. Through the arrangement, the temperature is changed after air is exhausted in the device, air in the device is prevented from being accumulated in the power source, and the stability of the device is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of sub - low - temperature devices, and particularly relates to a sub - low - temperature circulation device. Background Technique

[0002] Sub - low - temperature refers to the temperature of liquid nitrogen below - 196°C (i.e., below 77K), which is usually called biological sub - low - temperature. In this temperature range, liquid nitrogen can be used for cell cryopreservation, embryo transfer, germplasm resource preservation, etc. For example, in cell cryopreservation, cells are first cooled to about - 80°C in a refrigerator and then stored long - term by transporting sub - low - temperature liquid nitrogen to ensure the integrity and vitality of the cells.

[0003] In related technologies, a sub - low - temperature circulation device is usually used to provide a cold source for sub - low - temperature. The internal of the sub - low - temperature circulation device is provided with water - circuit devices such as condensers and heat - exchange modules, and also includes circuit devices such as a control main board to create a lower - temperature environment. Generally, the circulating water - circuit adopts internal circulation. When an external anhydrous water blanket starts to work, it will bring the air in the water blanket into the water - circuit, and the internal air cannot be excluded. If there is enough air and the pump power is insufficient, the air will concentrate at the pump impeller, resulting in the situation of pump idling. The pump idling will cause the pump temperature to rise sharply and overload the circuit breaker, resulting in the machine stopping working. Content of the Utility Model

[0004] The technical purpose of the utility model is to provide a sub - low - temperature device, aiming to solve the problem of high safety risks in the transfer sub - low - temperature device.

[0005] To solve the above - mentioned technical problems, the utility model proposes a sub - low - temperature circulation device, including:

[0006] A liquid storage tank storing circulating liquid, and the liquid storage tank is provided with an overflow port communicating with the external atmosphere, and the overflow port is used to discharge the air in the liquid storage tank;

[0007] An electromagnetic valve module, which has an exhaust state communicating with the liquid storage tank and a temperature - regulating state disconnected from the liquid storage tank;

[0008] A temperature - regulating component, including a power source and a heat - exchange module. When the electromagnetic valve module is in the exhaust state, the liquid storage tank, the electromagnetic valve module, the power source and the heat - exchange module are connected to form a closed exhaust circuit. When the electromagnetic valve module is in the temperature - regulating state, the electromagnetic valve module, the power source and the heat - exchange module are connected to form a closed temperature - regulating circuit. The power source is used to drive the circulating liquid to flow in the exhaust circuit or the temperature - regulating circuit, and the heat - exchange module is used to export the heat of the circulating liquid.

[0009] In some embodiments of the present invention, in the exhaust circuit, along the flow direction of the circulating liquid:

[0010] The liquid storage tank, the power source, the heat exchange module and the solenoid valve module are arranged in sequence;

[0011] Alternatively, the liquid storage tank, the heat exchange module, the power source and the solenoid valve module are arranged in sequence;

[0012] Alternatively, the liquid storage tank, the solenoid valve module, the power source and the heat exchange module are arranged in sequence;

[0013] Alternatively, the liquid storage tank, the solenoid valve module, the heat exchange module and the power source are arranged in sequence.

[0014] In some embodiments of the present invention, in the temperature control circuit, along the flow direction of the circulating fluid:

[0015] The solenoid valve module, the power source and the heat exchange module are arranged in sequence;

[0016] Alternatively, the solenoid valve module, the heat exchange module and the power source are arranged in sequence.

[0017] In some embodiments of the present utility model, the solenoid valve module includes a first solenoid valve, the first solenoid valve is provided with a first valve port, a second valve port and a third valve port, the first valve port is connected to the heat exchange module, the second valve port is connected to the liquid storage tank, the power source is provided with a first interface, a second interface and a third interface, the third valve port is connected to the first interface, the second interface is connected to the liquid storage tank, and the third interface is connected to the heat exchange module;

[0018] When the solenoid valve module is in the exhaust state, the first valve port is connected to the second valve port, and the liquid storage tank is connected to the heat exchanger;

[0019] When the solenoid valve module is in the temperature adjustment state, the first valve port is communicated with the third valve port, and the heat exchanger is communicated with the power source.

[0020] In some embodiments of the present invention, the heat exchange module includes a refrigeration component and a heat exchanger, and the two ends of the refrigeration component are respectively connected to the third interface and the heat exchanger. Heat exchange occurs when the circulating fluid passes through the heat exchanger, and the refrigeration component is used to extract the heat of the circulating fluid.

[0021] In some embodiments of the present invention, the refrigeration component is detachably connected to the third interface, and the sub-low temperature circulation device further comprises a liquid adding device detachably connected to the refrigeration component, and the circulating liquid is built in the liquid adding device.

[0022] In some embodiments of the utility model, the sub-low temperature circulation device has a liquid adding state and a liquid discharging state;

[0023] When the sub-low temperature circulation device is in the liquid adding state, the third interface is disconnected from the refrigeration component, the liquid adding device is connected to the refrigeration component, the first valve port is communicated with the third valve port, the liquid adding device, the refrigeration component, the heat exchanger, the first solenoid valve, the power source and the liquid storage tank are connected to form a one-way liquid adding passage, and the power source is used to drive the circulating liquid from the liquid adding device into the liquid storage tank;

[0024] When the sub-low temperature circulation device is in the drainage state, the third interface is disconnected from the refrigeration component, the first valve port is connected to the third valve port, the liquid storage tank and the power source are connected to form a first drainage passage, the refrigeration component, the heat exchanger, the first solenoid valve, and the power source are connected to form a second drainage passage, and the power source is used to drive the circulating fluid to be discharged from the liquid storage tank and the refrigeration component to the outside.

[0025] In some embodiments of the present invention, the solenoid valve module further includes a second solenoid valve disposed between the liquid storage tank and the second interface.

[0026] In some embodiments of the present invention, the sub-low temperature circulation device further includes a sensor assembly, the sensor assembly includes a hydraulic sensor, a temperature sensor and a liquid level sensor, and the hydraulic sensor and the temperature sensor are arranged at the refrigeration component.

[0027] In some embodiments of the present invention, the sensor assembly further includes a liquid level sensor disposed in the liquid storage tank.

[0028] Compared with the prior art, the utility model has the following beneficial effects:

[0029] The utility model provides a sub - low - temperature circulation device, which includes a liquid storage tank, a solenoid valve module, and a temperature - regulating component. Among them, the liquid storage tank stores circulating liquid, and the liquid storage tank is provided with an overflow port communicating with the external atmosphere, and the overflow port is used to discharge the air in the liquid storage tank. The solenoid valve module has an exhaust state communicating with the liquid storage tank and a temperature - regulating state disconnecting from the liquid storage tank. The temperature - regulating component includes a power source and a heat - exchange module. When the solenoid valve module is in the exhaust state, the liquid storage tank, the solenoid valve module, the power source, and the heat - exchange module are connected to form a closed exhaust circuit. When the solenoid valve module is in the temperature - regulating state, the solenoid valve module, the power source, and the heat - exchange module are connected to form a closed temperature - regulating circuit. The power source is used to drive the circulating liquid to flow in the exhaust circuit or the temperature - regulating circuit, and the heat - exchange module is used to export the heat of the circulating liquid. When the solenoid valve module is in the exhaust state, the circulating liquid in the liquid storage tank is transmitted to the heat - exchange module through the power source, driving the air inside the heat - exchange module to return to the liquid storage tank again. The overflow port of the liquid storage tank is in an open state, transmitting the air in the heat - exchange module and the pipeline to the outside for internal exhaust of the sub - low - temperature circulation device. After the air in the sub - low - temperature circulation device is discharged, the solenoid valve module is switched from the exhaust state to the temperature - regulating state. The solenoid valve module needs to be arranged between any one of the liquid storage tank and the temperature - regulating component, so as to realize the control of the solenoid valve module between the liquid storage tank and the temperature - regulating component. The solenoid valve module is disconnected from the liquid storage tank, and in the temperature - regulating state, the solenoid valve module is connected to one of the power source or the heat - exchange module in the temperature - regulating component, and the circulating liquid after changing the temperature circulates in the temperature - regulating circuit. Thus, it avoids the accumulation of air in the sub - low - temperature circulation device inside the power source, effectively prevents the phenomenon of the power source idling, and enhances the working stability of the sub - low - temperature circulation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a connection schematic diagram of the sub - low - temperature circulation device in an embodiment of the utility model;

[0031] Figure 2 is a connection schematic diagram of the sub - low - temperature circulation device in another embodiment of the utility model;

[0032] Figure 3 is a connection schematic diagram of the sub - low - temperature circulation device in another embodiment of the utility model;

[0033] Figure 4 is a structural schematic diagram of the solenoid valve module in the sub - low - temperature circulation device in another embodiment of the utility model when it is in the temperature - regulating state.

[0034] In the drawings, each reference numeral represents:

[0035] 11. Liquid storage tank; 12. Solenoid valve module; 121. First solenoid valve; 1211. First valve port; 1212. Second valve port; 1213. Third valve port; 122. Second solenoid valve; 13. Power source; 131. First interface; 132. Second interface; 133. Third interface; 14. Heat exchange module; 141. Heat exchanger; 142. Refrigeration component; 15. Liquid filling device. Detailed implementation mode

[0036] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0039] Please refer to Figures 1 to 3, the present utility model provides a sub - low - temperature circulation device, which includes a liquid storage tank 11, a solenoid valve module 12, and a temperature - regulating component. Among them, the liquid storage tank 11 stores circulating liquid, and the liquid storage tank 11 is provided with an overflow port communicating with the external atmosphere. The overflow port is used to discharge the air in the liquid storage tank 11. The solenoid valve module 12 has an exhaust state communicating with the liquid storage tank 11 and a temperature - regulating state disconnected from the liquid storage tank 11. The temperature - regulating component includes a power source 13 and a heat - exchange module 14. When the solenoid valve module 12 is in the exhaust state, the liquid storage tank 11, the solenoid valve module 12, the power source 13, and the heat - exchange module 14 are connected to form a closed exhaust circuit. When the solenoid valve module 12 is in the temperature - regulating state, the solenoid valve module 12, the power source 13, and the heat - exchange module 14 are connected to form a closed temperature - regulating circuit. The power source 13 is used to drive the circulating liquid to flow in the exhaust circuit or the temperature - regulating circuit, and the heat - exchange module 14 is used to export the heat of the circulating liquid.

[0040] When the solenoid valve module 12 is in the exhaust state, the circulating liquid in the liquid storage tank 11 is transmitted to the heat - exchange module 14 via the power source 13, driving the air inside the heat - exchange module 14 to return to the liquid storage tank 11 again. The overflow port of the liquid storage tank 11 is in an open state, transmitting the air in the heat - exchange module 14 and the pipeline to the outside, thereby realizing the internal exhaust of the sub - low - temperature circulation device and avoiding the accumulation of air in the sub - low - temperature circulation device inside the power source 13. The power source 13 can be a pump body. There is a large amount of air inside the pump body, which will cause the phenomenon of the impeller idling. The solenoid valve being in the exhaust state can effectively prevent the phenomenon of the power source 13 idling, enhancing the working stability of the sub - low - temperature circulation device.

[0041] After the air in the sub - low - temperature circulation device is discharged, the solenoid valve module 12 is switched from the exhaust state to the temperature - regulating state. The solenoid valve module 12 needs to be arranged between any one of the liquid storage tank 11 and the temperature - regulating component, so as to realize the control of the solenoid valve module 12 between the liquid storage tank 11 and the temperature - regulating component. The solenoid valve module 12 is disconnected from the liquid storage tank 11, and in the temperature - regulating state, the solenoid valve module 12 is connected to one of the power source 13 or the heat - exchange module 14 in the temperature - regulating component, and the circulating liquid after changing the temperature circulates in the temperature - regulating circuit.

[0042] The circulating liquid can be formed by mixing one or more of water, ethylene glycol, lithium bromide solution, etc. The circulating liquid passes through the heat - exchange module 14, and the heat - exchange module 14 can convert the circulating liquid from a state with higher heat to a state with lower heat. The circulating liquid with lower heat can create a sub - low - temperature environment and be applied to various scenarios.

[0043] Please refer to Figure 1, specifically, in the exhaust gas circuit, along the flow direction of the circulating liquid: the liquid storage tank 11, the power source 13, the heat exchange module 14, and the solenoid valve module 12 are arranged in sequence; or, the liquid storage tank 11, the heat exchange module 14, the power source 13, and the solenoid valve module 12 are arranged in sequence; or, the liquid storage tank 11, the solenoid valve module 12, the power source 13, and the heat exchange module 14 are arranged in sequence; or, the liquid storage tank 11, the solenoid valve module 12, the heat exchange module 14, and the power source 13 are arranged in sequence. In the temperature control circuit, along the flow direction of the circulating liquid: the solenoid valve module 12, the power source 13, and the heat exchange module 14 are arranged in sequence; or, the solenoid valve module 12, the heat exchange module 14, and the power source 13 are arranged in sequence. It should be understood that the above permutations and combinations are only some of the arrangement schemes. Under the concept of this application, as long as it is in a closed circuit, other permutation and combination methods of each module are also within the protection scope of this application.

[0044] The exhaust gas circuit and the temperature control circuit can be selected according to specific system design and operation requirements, so that the circulating liquid can circulate smoothly in the exhaust gas circuit and the temperature control circuit. Different arrangement methods may be applicable to different system structures and working conditions, and can flexibly meet the needs of actual applications.

[0045] The circulating liquid first circulates in the exhaust gas circuit, and the number of circulation times can be multiple times, which can ensure that air is effectively removed in the exhaust gas circuit and avoid the problem that the power source 13 idles due to the concentration of air at the impeller of the power source 13. The circulating liquid then enters the temperature control circuit for circulation, and can also circulate multiple times. After the temperature control component converts the heat of the circulating liquid, the circulating liquid exchanges heat with the outside world and then circulates again, and the temperature control component converts the heat of the circulating liquid again. The circulating liquid circulates in the temperature control circuit, which can also avoid dead angles and liquid accumulation, thus ensuring the stable operation and high efficiency of the sub-low temperature circulation device.

[0046] The exhaust gas circuit and the temperature control circuit are switched through the solenoid valve module 12, and other components are connected in sequence for circulation, which provides convenience for the maintenance and repair of the sub-low temperature circulation device and reduces the operation complexity during the maintenance process. The sub-low temperature circulation device also includes a control main board electrically connected to the solenoid valve module 12, and the user can control the state switching of the solenoid valve module 12 through the control main board.

[0047] The connection form between the control main board and the solenoid valve module 12 can be wired connection or wireless connection. The wired connection form can adopt the form of connecting wires. The control main board controls the solenoid valve module 12 more precisely and the signal transmission rate is faster.

[0048] The form of wireless connection can be a Wi-Fi connection. A Wi-Fi module is used to establish a wireless communication connection between the control main board and the solenoid valve, and data transmission and control instruction sending are achieved through a router or a direct connection method; a Bluetooth connection, using a Bluetooth module to achieve a short-distance wireless connection between the control main board and the solenoid valve, and control instructions can be sent through a mobile phone App or other Bluetooth devices; a Zigbee connection, Zigbee is a low-power, short-distance wireless communication protocol that can be used for data transmission and control signal transmission between the control main board and the solenoid valve; a LoRa connection, LoRa is an Internet of Things communication technology suitable for long-distance and low-power applications that can be used for remote communication connection between the control main board and the solenoid valve; an RF connection, a radio frequency communication module can achieve a wireless connection between the control main board and the solenoid valve, which is suitable for data transmission and control within a certain distance. Or other setup forms that can achieve remote wireless connection, enabling the control main board to control the solenoid valve module 12 without the need to be close to the sub-low temperature circulation device.

[0049] In one embodiment, please refer to Figure 2 and Figure 4 , the solenoid valve module 12 includes a first solenoid valve 121. The first solenoid valve 121 is provided with a first valve port 1211, a second valve port 1212, and a third valve port 1213. The first valve port 1211 is connected to the heat exchange module 14, the second valve port 1212 is connected to the liquid storage tank 11, the power source 13 is provided with a first interface 131, a second interface 132, and a third interface 133. The third valve port 1213 is connected to the first interface 131, the second interface 132 is connected to the liquid storage tank 11, and the third interface 133 is connected to the heat exchange module 14; when the solenoid valve module 12 is in the exhaust state, the first valve port 1211 and the second valve port 1212 are connected, and the liquid storage tank 11 is connected to the heat exchanger 141; when the solenoid valve module 12 is in the temperature adjustment state, the first valve port 1211 is connected to the third valve port 1213, and the heat exchanger 141 is connected to the power source 13.

[0050] Furthermore, the heat exchange module 14 includes a refrigerating member 142 and a heat exchanger 141. The two ends of the refrigerating member 142 are respectively connected to the third interface 133 and the heat exchanger 141. When the circulating liquid passes through the heat exchanger 141, heat exchange occurs, and the refrigerating member 142 is used to export the heat of the circulating liquid. The refrigerating member 142 can be a transfer box for storing items that need to be stored in a sub-low temperature environment, and the refrigerating member 142 can also be an application device such as a water cap or a water blanket for providing refrigerant for users who need sub-low temperature treatment.

[0051] The heat exchange module 14 further includes a compressor communicated with the heat exchanger 141. When the temperature of the sub-low temperature area of the refrigerating member 142 is too low, the compressor can compress the built-in condensate, thereby compressing the gaseous condensate into a liquid state. The liquefaction of the condensate will release heat, and through the heat exchanger 141, the heat is transferred to the circulating liquid, causing the circulating liquid communicated with the refrigerating member 142 to heat up, realizing the heating function of the transfer sub-low temperature device and maintaining the sub-low temperature of the refrigerating member 142.

[0052] When the temperature of the sub-low temperature area of the refrigerating member 142 is too high, the compressor stops compressing, and the liquid condensate vaporizes. The vaporization causes the condensate to absorb heat. Through the heat transfer of the heat exchanger 141, the temperature of the circulating liquid decreases, resulting in the decrease of the temperature of the sub-low temperature area of the refrigerating member 142.

[0053] Through the combination of the first solenoid valve 121, the power source 13, the liquid storage tank 11 and the refrigerating member 142, precise temperature control of a specific area can be achieved, the energy consumption can be effectively adjusted, and the energy efficiency ratio of the system can be improved, so as to achieve the purpose of energy saving and high efficiency. The power source 13 circulates the circulating liquid through electrical connection, and the refrigerating member 142 can provide the required refrigeration effect in the sub-low temperature area, thereby realizing precise temperature control.

[0054] The refrigerating member 142 is detachably connected to the third interface 133. The sub-low temperature circulation device further includes a liquid adding device 15 detachably connected to the refrigerating member 142, and the liquid adding device 15 is internally provided with circulating liquid. Before the sub-low temperature circulation device performs the exhaust operation, it is necessary to first supplement the circulating liquid into the liquid storage tank 11. To realize the automatic control of the liquid adding operation of the circulating liquid in the liquid storage tank 11, the sub-low temperature circulation device further includes a liquid adding device 15 detachably connected to the refrigerating member 142, and the liquid adding device 15 is internally provided with circulating liquid. The circulating liquid in the liquid adding device 15 enters the refrigerating member 142 and then enters the liquid storage tank 11 through the pipeline via the solenoid valve module 12. The capacity and flow rate of the circulating liquid entering the liquid storage tank 11 can be realized through the solenoid valve module 12, so that the liquid adding operation of the sub-low temperature circulation device can be automatically carried out and precisely controlled.

[0055] Specifically, please refer to Figure 3 , the sub-low temperature circulation device has a liquid adding state and a liquid discharging state.

[0056] When the sub-low temperature circulation device is in the liquid adding state, the third interface 133 is disconnected from the refrigeration element 142, the liquid adding device 15 is connected to the refrigeration element 142, the first valve port 1211 is connected to the third valve port 1213, the liquid adding device 15, the refrigeration element 142, the heat exchanger 141, the first solenoid valve 121, the power source 13 and the liquid storage tank 11 are connected to form a one-way liquid adding passage, and the power source 13 is used to drive the circulating liquid from the liquid adding device 15 into the liquid storage tank 11. The refrigeration element 142 is provided with a liquid inlet and a liquid outlet. The position where the refrigeration element 142 is connected to the third interface 133 is the liquid inlet. The liquid inlet and the liquid outlet can be provided with a one-way valve. The liquid adding device 15 is connected to the liquid inlet to perform the liquid adding operation. The third interface 133 can be provided with a one-way valve. The circulating liquid cannot enter directly from the third interface 133 and needs to enter the liquid storage tank through the one-way liquid adding passage.

[0057] When the sub-low temperature circulation device is in the liquid discharge state, the third interface 133 is disconnected from the refrigeration element 142, the first valve port 1211 is connected to the third valve port 1213, the liquid storage tank 11 and the power source 13 are connected to form a first liquid discharge passage, the refrigeration element 142, the heat exchanger 141, the first solenoid valve 121, and the power source 13 are connected to form a second liquid discharge passage, and the power source 13 is used to drive the circulating liquid from the liquid storage tank 11 and the refrigeration element 142 to the outside. The position where the heat exchanger 141 and the refrigeration element 142 are connected is the liquid discharge port, and the power source 13 drives the circulating liquid to be discharged from the liquid discharge port. A one-way valve may be provided at the position where the heat exchanger 141 and the refrigeration element 142 are connected, and the circulating liquid cannot be discharged from the heat exchanger 141.

[0058] In another embodiment, the solenoid valve module 12 further includes a second solenoid valve 122 disposed between the liquid storage tank 11 and the second interface 132. The second solenoid valve 122 can always keep the power source 13 connected to the liquid storage tank 11, that is, the second solenoid valve 122 can be used as an outlet or an inlet of the liquid storage tank 11. The solenoid valve module 12 does not need to wait for all the circulating liquid in the liquid storage tank 11 to be discharged before switching to the temperature control circuit. Through the control of the second solenoid valve 122, the content of the circulating liquid in the temperature control circuit can be accurately controlled, and the accuracy of the sub-low temperature circulation device can be improved for different temperature requirements.

[0059] The control main board may also be provided with a control program, such as a timing program, a judgment program, etc., through which the state of the solenoid valve module 12 is automatically switched. For the timing program, the time required for one circulation in the exhaust circuit can be calculated based on the weight of the circulating liquid in the liquid storage tank 11, and the number of times the circulating liquid can be used to discharge most or even all of the air is obtained through multiple uses, so as to preset the corresponding time. When the exhaust circuit reaches the corresponding time, the timing program controls the solenoid valve module 12 to switch to the temperature control circuit.

[0060] In the mild hypothermia circulation device, a sensor assembly may also be provided. The sensor assembly includes a liquid level sensor disposed in the liquid storage tank 11. The liquid level sensor can detect the liquid level in the liquid storage tank 11. When the liquid level reaches the zero level from the highest point and then reaches the highest point from the zero level, it can be determined that the circulating liquid has completed one cycle in the exhaust circuit. The number of cycles can be preset in the judgment program. After reaching the number of cycles, it can be determined that the air has been exhausted, and thus the solenoid valve module 12 changes to the temperature regulation state.

[0061] The sensor assembly further includes a hydraulic sensor and a temperature sensor. The hydraulic sensor and the temperature sensor are disposed at the refrigeration component 142 and are used to detect the hydraulic pressure and temperature of the circulating liquid entering the refrigeration component 142, and transmit them to the control main board, which can be fed back to the user to prompt the user of the specific temperature of the refrigeration component 142 for the user to view.

[0062] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sub-low temperature circulation device, characterized in that: include: A liquid storage tank storing circulating liquid, wherein the liquid storage tank is provided with an overflow port communicating with the external atmosphere, and the overflow port is used to discharge air in the liquid storage tank; A solenoid valve module, wherein the solenoid valve module has a venting state connected to the liquid storage tank and a temperature adjustment state disconnected from the liquid storage tank; The temperature control component includes a power source and a heat exchange module. When the solenoid valve module is in the exhaust state, the liquid storage tank, the solenoid valve module, the power source and the heat exchange module are connected to form a closed exhaust circuit. When the solenoid valve module is in the temperature control state, the solenoid valve module, the power source and the heat exchange module are connected to form a closed temperature control circuit. The power source is used to drive the circulating fluid to flow in the exhaust circuit or the temperature control circuit, and the heat exchange module is used to extract the heat of the circulating fluid.

2. The sub-low temperature cycle device according to claim 1, characterized in that: In the exhaust circuit, along the flow direction of the circulating fluid: The liquid storage tank, the power source, the heat exchange module and the solenoid valve module are arranged in sequence; Alternatively, the liquid storage tank, the heat exchange module, the power source and the solenoid valve module are arranged in sequence; Alternatively, the liquid storage tank, the solenoid valve module, the power source and the heat exchange module are arranged in sequence; Alternatively, the liquid storage tank, the solenoid valve module, the heat exchange module and the power source are arranged in sequence.

3. The sub-low temperature cycle device according to claim 1, characterized in that: In the temperature control circuit, along the flow direction of the circulating fluid: The solenoid valve module, the power source and the heat exchange module are arranged in sequence; Alternatively, the solenoid valve module, the heat exchange module and the power source are arranged in sequence.

4. The sub-low temperature cycle device according to claim 1, characterized in that: The solenoid valve module comprises a first solenoid valve, the first solenoid valve is provided with a first valve port, a second valve port and a third valve port, the first valve port is connected to the heat exchange module, the second valve port is connected to the liquid storage tank, the power source is provided with a first interface, a second interface and a third interface, the third valve port is connected to the first interface, the second interface is connected to the liquid storage tank, and the third interface is connected to the heat exchange module; When the solenoid valve module is in the exhaust state, the first valve port is connected to the second valve port, and the liquid storage tank is connected to the heat exchanger; When the solenoid valve module is in the temperature adjustment state, the first valve port is communicated with the third valve port, and the heat exchanger is communicated with the power source.

5. The sub-low temperature cycle device according to claim 4, characterized in that: The heat exchange module includes a refrigeration component and a heat exchanger. Both ends of the refrigeration component are connected to the third interface and the heat exchanger respectively. Heat exchange occurs when the circulating fluid passes through the heat exchanger. The refrigeration component is used to extract the heat of the circulating fluid.

6. The sub-low temperature cycle device according to claim 5, characterized in that: The refrigeration component is detachably connected to the third interface, and the sub-low temperature circulation device further comprises a liquid adding device detachably connected to the refrigeration component, wherein the circulating liquid is built in the liquid adding device.

7. The sub-low temperature cycle device according to claim 6, characterized in that: The sub-low temperature circulation device has a liquid adding state and a liquid discharging state; When the sub-low temperature circulation device is in the liquid adding state, the third interface is disconnected from the refrigeration component, the liquid adding device is connected to the refrigeration component, the first valve port is communicated with the third valve port, the liquid adding device, the refrigeration component, the heat exchanger, the first solenoid valve, the power source and the liquid storage tank are connected to form a one-way liquid adding passage, and the power source is used to drive the circulating liquid from the liquid adding device into the liquid storage tank; When the sub-low temperature circulation device is in the drainage state, the third interface is disconnected from the refrigeration component, the first valve port is connected to the third valve port, the liquid storage tank and the power source are connected to form a first drainage passage, the refrigeration component, the heat exchanger, the first solenoid valve, and the power source are connected to form a second drainage passage, and the power source is used to drive the circulating fluid to be discharged from the liquid storage tank and the refrigeration component to the outside.

8. The sub-low temperature cycle device according to claim 7, characterized in that: The solenoid valve module further includes a second solenoid valve disposed between the liquid storage tank and the second interface.

9. The sub-low temperature cycle device according to claim 5, characterized in that: The sub-low temperature circulation device further comprises a sensor assembly, wherein the sensor assembly comprises a hydraulic sensor, a temperature sensor and a liquid level sensor, and the hydraulic sensor and the temperature sensor are arranged at the refrigeration component.

10. The sub-low temperature cycle device according to claim 9, characterized in that: The sensor assembly also includes a liquid level sensor disposed in the liquid storage tank.

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