A portable temperature control device suitable for use in an outdoor high temperature work environment

Abstract

The application discloses a portable temperature control device suitable for outdoor high-temperature operation environment, which adopts volatile solid cooling medium and realizes continuous, efficient and accurate temperature control through feedback regulation of circulating air flow; the volatile solid cooling medium is discharged in the form of gas after sublimation, which can reduce the weight of the device and avoid the discomfort caused by possible adhesion of liquid refrigerant to the skin surface, thereby improving portability and use comfort; the whole device has low noise and vibration, is easy to operate, and improves the feasibility of practical application; and the device is suitable for the power industry, building construction, mine operation, outdoor sports and other high-temperature operation environments and can meet the cooling demand of individuals in high-temperature environments.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wearable temperature control devices, and particularly relates to a portable temperature control device suitable for outdoor high-temperature working environment. BACKGROUND

[0002] Under high-temperature working environment, the body temperature regulation problem of workers has been a technical problem to be solved in the field of industrial production and labor protection. In a high-temperature environment, the human body is prone to heatstroke, dehydration and other health problems due to overheating, which affects the physical health and work efficiency of workers. Especially in the scenes of power industry front-line operation, construction, mining and other scenes, workers often need to be exposed to hot environment for a long time. How to achieve effective body surface temperature control through technical means and provide comfortable working conditions has become a key technical direction.

[0003] At present, there are many refrigeration temperature control clothing products for high-temperature environment on the market, and the implementation principles mainly include ice / water cold storage technology, air cooling technology, compressor refrigeration technology and chemical refrigeration technology. These technologies have their own advantages, but there are still many shortcomings in practical application:

[0004] 1) Ice / water cold storage technology.

[0005] Ice / water cold storage technology achieves rapid cooling effect through the phase change heat absorption of ice packs or cooling liquids. Typical products mostly use ice packs filled in the inside of clothing to absorb human heat by closely adhering to the skin to achieve cooling.

[0006] Disadvantages: This kind of technology has obvious cooling effect, but the duration is limited. When the ice or cooling liquid is completely melted, the cooling effect almost disappears. Frequent replacement of cooling medium not only increases the operation complexity, but also reduces the convenience of use. In addition, ice packs need to be closely attached to the skin to feel the cooling effect significantly, which may affect the user's comfort.

[0007] 2) Air cooling technology.

[0008] Air cooling technology generates air flow through the built-in fan to increase sweat evaporation and enhance heat dissipation effect. Typical products embed fans in clothing to take away heat through air flow circulation.

[0009] Disadvantages: Although the air cooling technology has low cost, in extreme high-temperature environment, the fan may blow hot air, which makes the user more uncomfortable. In addition, this technology is greatly dependent on the user's body sweating. If the user wears multiple layers of clothing or has insufficient sweating, the cooling effect will be significantly weakened.

[0010] 3) Compressor refrigeration technology.

[0011] Compressor refrigeration technology uses miniature compressors to circulate refrigerants, achieving a sustained cooling effect. This technology is usually embedded in the garment with refrigeration pipes and attached to the outside of the garment with a miniature compressor module.

[0012] Disadvantages: Compressor refrigeration technology has significant cooling effect and can run for a long time, but the device is large in size and weight, and has poor portability. Users may feel uncomfortable when wearing it for a long time. In addition, the noise during device operation is large, which may affect the working environment.

[0013] 4) Chemical refrigeration technology.

[0014] Chemical refrigeration technology uses the endothermic reaction of chemicals, such as condensation gel packs or cooling powder, to absorb human heat, achieving short-term cooling effect.

[0015] Disadvantages: This technology has low use cost, but the duration is short, and the cooling effect is uncontrollable, making it difficult to meet the needs of long-term high-temperature work.

[0016] In summary, the existing refrigeration temperature control clothing products have the following main problems in high-temperature working environment:

[0017] a) The duration of sustained cooling is limited, making it difficult to meet the needs of long-term high-temperature work;

[0018] b) The cooling effect is easily affected by environmental conditions and wearing methods, and cannot provide consistent cooling experience;

[0019] c) Poor portability and comfort affect the long-term use experience of workers;

[0020] d) Some technologies have problems such as noise, vibration or complex operation, reducing the feasibility of actual application.

[0021] Therefore, it is urgent to develop a portable temperature control technology for high-temperature working environment temperature control clothing. This technology needs to have sustained and efficient cooling capacity, as well as portability and comfort, to meet the needs of long-term work in high-temperature environment. Through innovative technology design, the limitations of existing technology are solved, and safer and more comfortable working conditions are provided for high-temperature workers. SUMMARY

[0022] The purpose of the present application is to provide a portable temperature control device suitable for outdoor high-temperature working environment, which has sustained and efficient cooling capacity, as well as portability, comfort and feasibility of actual application.

[0023] The purpose of the present application is achieved by the following technical solutions:

[0024] The application discloses a portable temperature control device suitable for outdoor high-temperature working environment, which comprises a heat exchange device, an external gas circulation passage, a gas flow circulation control device and a safety protection device.

[0025] The heat exchange device and the external gas circulation passage are connected in series, the heat exchange device is used for realizing heat exchange between circulating gas flow and volatile solid cooling medium, and the external gas circulation passage is used for realizing heat exchange between circulating gas output by the heat exchange device and an external heat exchange unit.

[0026] The safety protection device is used for monitoring and controlling internal gas pressure of the heat exchange device and is also used for controlling the communication state of the heat exchange device and the external gas circulation passage.

[0027] The gas flow circulation control device is used for calculating feedback parameters through a temperature control model according to individualized temperature control parameters, and is also used for controlling the on-off of circulating gas flow or adjusting the flow rate of circulating gas flow in the heat exchange device and the external gas circulation passage according to the feedback parameters.

[0028] As can be seen from the technical scheme of the application, the volatile solid cooling medium is used, and the circulating gas flow is adjusted through feedback, so that continuous, efficient and accurate temperature control is realized. After the volatile solid cooling medium is sublimed, the gas is discharged, the weight of the device is reduced, the discomfort caused by the liquid refrigerant adhering to the skin surface is avoided, and the portability and use comfort are improved. The whole device has low noise and vibration, is easy to operate, and the practical application feasibility is improved. The device can be applied to the power industry, building construction, mine operation, outdoor sports and other high-temperature working environments, and can meet the cooling needs of individuals in high-temperature environments. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme of the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 A frame schematic diagram of the portable temperature control device suitable for outdoor high-temperature working environment is provided for the embodiments of the application.

[0031] Figure 2 A structure schematic diagram of the portable temperature control device suitable for outdoor high-temperature working environment is provided for the embodiments of the application. DETAILED DESCRIPTION

[0032] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts are within the protection scope of the present application.

[0033] Firstly, the terms possibly used in the present application are described as follows:

[0034] The term "and / or" means either one or both, for example, X and / or Y means three cases including "X", "Y" or "X and Y".

[0035] The terms "include", "contain", "have", "possess" or other similar semantic descriptions should be interpreted as non-exclusive inclusion. For example, including a technical feature element (such as raw materials, components, ingredients, carriers, dosage forms, materials, sizes, parts, components, mechanisms, devices, steps, processes, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or articles, etc.) should be interpreted as not only including the explicitly listed technical feature element, but also including other technical feature elements not explicitly listed in the art.

[0036] The term "consisting of" means excluding any technical feature element not explicitly listed. If this term is used in the claims, the term will make the claim closed, so that it does not contain technical feature elements other than the explicitly listed technical feature elements, except for conventional impurities related thereto. If the term only appears in a certain clause of the claim, it is only limited to the elements explicitly listed in the clause, and the elements described in other clauses are not excluded from the overall claim.

[0037] Unless otherwise explicitly specified or limited, the terms "mount", "connect", "connect", "fix", and the like should be broadly understood, for example: can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] A portable temperature control device suitable for outdoor high-temperature working environment is described in detail below. The contents not described in detail in the embodiments of the present application belong to the prior art known to those skilled in the art. If no specific conditions are specified in the embodiments of the present application, the conditions are in accordance with the conventional conditions in the art or the conditions recommended by the manufacturer. If no manufacturer is specified for the cooling medium or instrument used in the embodiments of the present application, it is a conventional product that can be purchased on the market.

[0039] Embodiment one

[0040] A portable temperature control device suitable for outdoor high-temperature working environment is provided in the embodiments of the present application, as shown in FIG. 1, which mainly includes a heat exchange device, an external gas circulation passage, a gas flow circulation control device, and a safety protection device; wherein: Figure 1

[0041] (1) The heat exchange device and the external gas circulation passage are connected end to end, the heat exchange device is used to achieve heat exchange between circulating gas flow and volatile solid cooling medium, and the external gas circulation passage is used to achieve heat exchange between circulating gas output by the heat exchange device and an external heat exchange unit.

[0042] Preferably, the volatile solid cooling medium can be dry ice (solid carbon dioxide). At normal temperature and pressure, the temperature of dry ice is as low as -78.5°C, and there is a significant temperature gradient compared with the comfortable temperature range of the human body (for example, about 25°C), effectively solving the problem of difficulty or slow rate of cooling in high-temperature environment. Compared with traditional ice blocks and other refrigeration sources, the refrigeration effect of dry ice is more significant, and its refrigeration process is more efficient and durable.

[0043] Preferably, the heat exchange device includes a cooling cavity and a gas pipeline; the gas pipeline is arranged inside the cooling cavity, and the cooling cavity is provided with volatile solid cooling medium; the adiabatic cavity is provided with a volatile solid cooling medium loading and unloading port, a gas pipeline inlet and outlet, and an interface (i.e. internal gas pressure monitoring and release port) for mounting the safety protection device.

[0044] Preferably, the gas pipeline is made of heat-conducting material (for example, copper pipe), and is arranged in a serpentine layout inside the cooling cavity to increase the heat exchange area.

[0045] Preferably, the outside of the cooling cavity is made of heat-insulating material to form an adiabatic cavity.

[0046] Illustratively, the external heat exchange unit can be a workwear.

[0047] (2) The safety protection device is used to monitor and control the internal gas pressure of the heat exchange device, and is also used to control the communication state of the heat exchange device and the external gas circulation passage.​

[0048] Preferably, the safety protection device comprises: a gas discharge valve arranged in the heat exchange device and having a pressure limiting function; and a gas flow circulation valve for controlling the communication state of the heat exchange device and the external gas circulation passage, so as to realize one-key closing of the gas flow circulation valve in an emergency (e.g., the temperature of the external heat exchange unit is too low), for example, when a certain component of the device fails to cause the temperature of the external gas circulation passage to be low, in order to avoid discomfort or harm to the user, at this time, the communication state of the heat exchange device and the external gas circulation passage can be cut off by one-key closing of the gas flow circulation valve (manually or automatically, or a combination of both). The above-mentioned gas flow circulation valve can be arranged at the connection between the heat exchange device and the external gas circulation passage on one side (through the connection between the heat exchange device outlet and the external gas circulation passage inlet, or the connection between the external gas circulation passage outlet and the heat exchange device inlet) according to actual conditions. Figure 1 The safety protection device right side fold line display), for example, it can be arranged at the connection between the heat exchange device outlet and the external gas circulation passage inlet, or at the connection between the external gas circulation passage outlet and the heat exchange device inlet.

[0049] (3) The gas flow circulation control device is used to calculate feedback parameters through a temperature control model according to the personalized set temperature control parameters, and control the on-off or flow rate of the circulating gas flow in the heat exchange device and the external gas circulation passage in combination with the feedback parameters.

[0050] Preferably, the gas flow circulation control device comprises: a gas flow adjusting device, a gas flow driving device, a temperature monitoring unit, and a central data summary processing unit; wherein:

[0051] The temperature monitoring unit is arranged at the connection between the heat exchange device and the external gas circulation passage (specifically, the connection between the heat exchange device outlet and the external gas circulation passage inlet, or the connection between the external gas circulation passage outlet and the heat exchange device inlet), and in the external gas circulation passage, and feeds back the monitored temperature to the central data summary processing unit;

[0052] The gas flow adjusting device is arranged at the connection between the heat exchange device and the external gas circulation passage (specifically, the connection between the heat exchange device outlet and the external gas circulation passage inlet, or the connection between the external gas circulation passage outlet and the heat exchange device inlet), and is used to adjust the size of the gas flow valve in combination with the gas flow driving device and the feedback parameters;

[0053] The gas flow driving device is arranged at the connection between the heat exchange device and the external gas circulation passage (specifically, the connection between the external gas circulation passage outlet and the heat exchange device inlet), and is used to drive the circulating gas flow, control the driving size in combination with the feedback parameters, monitor the flow rate of the circulating gas, and feed back to the central data summary processing unit; the on-off or flow rate of the circulating gas flow is realized through the cooperation of the driving size and the size of the gas flow valve.

[0054] The central data aggregation and processing unit is used to combine the monitored temperature, the monitored flow rate of the circulating gas, and the personalized temperature control parameters (e.g., temperature control speed, target temperature, etc.) to calculate feedback parameters through the temperature control model.

[0055] Preferably, depending on the temperature control accuracy requirements, a single feedback control algorithm or a feedback control algorithm with a filter can be selected as the temperature control model to calculate the feedback parameters. For example, a single feedback control algorithm includes, but is not limited to, a PID (proportional-integral-derivative) feedback control algorithm, and a feedback control algorithm with a filter includes, but is not limited to, a feedback control algorithm combining a Kalman filter and a PID controller.

[0056] like Figure 1 As shown, the heat exchange device is connected end to end to the external gas circulation passage, so that the circulating gas flow in the device forms a complete loop, and the airflow circulation control device adjusts the flow rate of the circulating air in the loop, thereby realizing the airflow circulation control device.

[0057] To more clearly demonstrate the technical solution and its effects provided by the present invention, the device provided by the embodiments of the present invention will be described in detail below with reference to specific examples.

[0058] In this embodiment, dry ice is used as an example. The main advantages of using dry ice are as follows: At normal temperature and pressure, the temperature of dry ice is -78.5℃, which has a large temperature gradient compared to the human comfort temperature range (e.g., 25℃). Therefore, it can effectively avoid the problem of the temperature being difficult to lower or the lowering rate being too slow. Compared with other refrigerants such as ice cubes, dry ice has a better cooling effect. For example, under the condition of an average air flow rate of 10 liters / minute (L / min), lowering the airflow temperature from 40℃ to 25℃, combined with the specific heat capacity of air (approximately 1005 J / kg·℃) and the density of air (approximately 1.225 kg / m³), demonstrates superior cooling performance. 3 Based on this, the heat absorbed per minute can be calculated to be approximately 185 J. Combining this with the latent heat of sublimation of dry ice (571 kJ / kg, or 571,000 J / kg), it can be further calculated that approximately 0.323 grams of dry ice need to sublimate per minute to absorb this heat. Therefore, under ideal conditions, one pound (500g) of dry ice can provide continuous cooling for approximately 25.8 hours, thus offering high portability and cooling efficiency. Furthermore, the sublimated dry ice is released as a gas, not increasing the weight of the device and avoiding the problem of liquid refrigerants potentially adhering to the skin, thus improving user comfort.

[0059] This embodiment mainly introduces the structure of the entire device and its internal working principle.

[0060] I. Device structure

[0061] As shown in the following figure, the structure of the entire device is shown, part of which is introduced as follows: Figure 2

[0062] ① is a gas flow regulating device, for example, a gas flow regulating valve, which can control the on-off or flow of the circulating gas flow by adjusting the size of the valve, and can realize accurate regulation of the gas flow through feedback parameters (feedback signals) of the central data collection and processing unit.

[0063] ② is a gas flow driving device, for example, including a blower and a gas flow meter, the blower is mainly used to drive the circulating gas flow, and the flow rate of the circulating gas flow can be controlled by adjusting the driving size, and the same is controlled by the feedback parameters of the central data collection and processing unit; the gas flow meter is an optional configuration, which is responsible for monitoring the flow rate of the circulating gas and feeding back to the central data collection and processing unit.

[0064] ③ is a gas pipeline, which can be made of a material with good heat conduction performance (for example, a copper pipe), arranged in a serpentine shape in the cooling cavity, increasing the contact area with the cooling medium, thereby improving the heat exchange efficiency.

[0065] ④ is a cooling cavity, which is designed with heat insulation material on the outside to form a heat insulation cavity, and is provided with a dry ice loading and unloading port (not shown in the figure), a circulating gas flow pipeline inlet and outlet, and an internal gas pressure monitoring and release port. The circulating gas is cooled by passing through the cooling cavity.

[0066] In this embodiment, the cooling cavity ④ can be designed in a detachable form, and when the dry ice in the cooling cavity is insufficient, a new cooling cavity can be directly replaced to improve the portability and operation convenience of the device. Of course, when working in the field, dry ice can also be supplemented through a large-capacity dry ice storage device to ensure that the amount of dry ice in the cooling cavity ④ is sufficient.

[0067] In addition, the specific type of circulating gas can be selected according to actual conditions, for example, air can be directly used, or other types of gas can be used, and the present application is not limited.

[0068] ​⑤ Safety protection device, including: a gas discharge valve with pressure limiting function, for example, a pressure relief safety valve, used to release excess carbon dioxide gas when the internal pressure of the cooling cavity exceeds the safety threshold, preventing the cavity pressure from being too high. Also including, a gas flow circulation valve that controls the communication state of the heat exchange device and the external gas circulation passage, which is normally in an open state, allowing the heat exchange device to communicate with the external gas circulation passage, and in an emergency, the gas flow circulation valve can be closed to cut off the communication state of the heat exchange device and the external gas circulation passage. The gas flow circulation valve is not shown in the figure, as previously described, the gas flow circulation valve can be placed at the connection between the heat exchange device and the external gas circulation passage according to actual conditions. Of course, in the specific implementation process, the aforementioned gas flow regulating device ① can also be configured as a gas flow regulating device with safety protection function, that is, the gas flow regulating device with safety protection function not only serves as a gas flow circulation valve in the safety protection device, responsible for starting the one-key closing function to cut off the communication state of the heat exchange device and the external gas circulation passage under certain conditions (such as emergency conditions such as external heat exchange unit temperature being too low); at the same time, it also serves as a gas flow regulating device in the gas flow circulation control device, responsible for the on-off or flow control of circulating gas under normal conditions.

[0069] ⑥ Temperature monitoring unit, for example, temperature sensor, the number of settings is multiple, and is distributed in different key positions, real-time acquisition of gas flow temperature data, feedback to the central data summary processing unit for temperature control.

[0070] ⑦ External gas circulation passage, which provides an external circulation path for gas flow, used in combination with other external modules (such as external heat exchange unit) to improve the flexibility of the entire device.

[0071] ⑧ Feedback control loop, mainly used for transmission of feedback parameters (feedback signals) to control the gas flow regulating valve and the blower, to achieve precise temperature control through closed-loop control.

[0072] ⑨ Central data summary processing unit, which is the core control unit of the entire device, receives personalized temperature control parameters (temperature control speed and target temperature), monitored temperature, and monitored circulation gas flow rate (as shown by the arrow on the right side of the central data summary processing unit ⑨), and calculates feedback parameters using an internal temperature control model.

[0073] ⑩ External heat exchange unit, which is used for specific job scenarios, and achieves job temperature control requirements by exchanging heat with circulating gas. For example, the external heat exchange unit can be a job cavity, a job suit, an external environment, etc.

[0074] The skilled person in the art can understand that the air flow regulating device ①, the air flow driving device ② and the central data aggregation processing unit ⑨ can be powered by separate power modules, and this part of the design can be realized by referring to conventional technology, which will not be described herein.

[0075] II. Internal working principle of the device.

[0076] 1. Heat exchange of cooling air flow.

[0077] 1) Air flow path design.

[0078] The air flow passes through the cooling cavity ④ through the serpentine air flow pipe ③. The design of the serpentine air flow pipe ③ is to increase the contact area of the air flow and the cooling medium, so as to improve the heat exchange efficiency.

[0079] 2) Cooling cavity design.

[0080] The cooling cavity ④ is designed to be heat-insulated, for example, with a vacuum heat-insulating layer, to reduce the influence of the external environment on heat exchange. The cooling cavity ④ is filled with a cooling medium, such as dry ice.

[0081] 2. Safety air pressure regulation.

[0082] 1) Pressure release mechanism.

[0083] The device is provided with a pressure release valve ⑤. When the air pressure inside the cooling cavity ④ exceeds the preset safety threshold, the valve ⑤ will release the excess gas in time to prevent safety accidents.

[0084] 3. Air flow circulation and feedback regulation.

[0085] 1) Feedback regulation loop configuration.

[0086] Air flow regulating valve ①: used to control the on-off or flow rate of air flow. Air blower and gas flow meter ②: drive air flow and monitor air flow rate, and the flow rate data can be fed back to the central processor ⑨ in real time. Temperature monitoring unit ⑥ (multiple positions): monitors the temperature of air flow at multiple key positions. Central data aggregation processing unit ⑨: receives the multi-point temperature data collected by the temperature monitoring unit ⑥ and the circulating gas flow rate collected by the flow meter, and generates feedback parameters by combining the set temperature control speed and the target temperature, which are transmitted to the air flow regulating valve and the air blower through the feedback control loop ⑧ to adjust the operating state of the air flow valve ① and the air blower.

[0087] 2) Temperature control feedback mechanism.

[0088] When the temperature is higher than the target cooling temperature, the feedback signal generated by the central data aggregation processing unit ⑨ is used to increase the size of the air flow valve and / or increase the driving size, so as to increase the flow rate of the circulating air flow, thereby accelerating the cooling process.

[0089] When the temperature reaches or is within a set value of the target temperature, the feedback signal generated by the central data aggregation processing unit 9 is used to reduce the size of the air flow valve and / or reduce the driving size to reduce the flow rate of the circulating air flow; or, the air flow valve is closed and / or the air flow driving device is stopped to close the circulating air flow to maintain the stability of the temperature.

[0090] In addition, the central data aggregation processing unit 9 adjusts the control amount for adjusting the size of the air flow valve and the driving size in the feedback signal in combination with the monitored flow rate of the circulating air and the temperature control speed.

[0091] 4. High-precision temperature control.

[0092] This part can be an optional implementation. Specifically, the air flow adjustment algorithm can be optimized:

[0093] On the one hand, the air flow adjustment algorithm can be further optimized according to the actual temperature control precision requirement.

[0094] On the other hand, in high-precision temperature control applications, Kalman filter and PID control (proportional-integral-derivative control) can be combined to achieve more accurate air flow control to meet the requirements of application scenarios with high temperature regulation precision.

[0095] The related temperature control algorithms involved in this part can be implemented by conventional techniques, and therefore will not be described in detail.

[0096] The above-mentioned device provided by the embodiment of the application is based on a portable cooling method of circulating air flow, combined with a volatile solid cooling medium, and ingeniously combines an air flow circulation control system and an efficient heat exchange design, effectively solving the cooling problem in a high-temperature working environment. Its main advantages are as follows: 1) It has high and durable cooling capacity. For example, the low-temperature characteristics and large latent heat of sublimation of dry ice ensure long-time and high-intensity refrigeration effect; 2) The safety and reliability are significantly improved, and the stable operation of the system is ensured by the pressure release safety valve and the real-time feedback adjustment mechanism; 3) It has portability and comfort, and there is no liquid residue in the sublimation of dry ice, and the cooling cavity can be quickly replaced, which is convenient for field operation; 4) It realizes precise temperature control and meets the high-precision temperature control requirement; 5) It has flexible and variable use modes and is suitable for various high-temperature working scenarios; 5) It has high energy efficiency and good environmental protection, and does not rely on electric refrigeration, and automatically adjusts the air flow to reduce energy waste.

[0097] The above description is merely preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions easily conceived by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims. The information disclosed in the background section of the present application is merely intended to deepen the understanding of the general background of the present application, and should not be regarded as acknowledging or implying in any form that the information constitutes the prior art known to those skilled in the art.

Claims

1. A portable temperature control device suitable for outdoor high-temperature working environments, characterized in that, include: Heat exchange device, external gas circulation passage, airflow circulation control device and safety protection device; among which: The heat exchange device is connected end-to-end to the external gas circulation path. The heat exchange device is used to realize heat exchange between the circulating airflow and the volatile solid cooling medium. The external gas circulation path is used to realize heat exchange between the circulating gas output by the heat exchange device and the external heat exchange unit. The heat exchange device includes a cooling chamber and a gas pipeline. The gas pipeline is disposed inside the cooling chamber, and the cooling chamber contains a volatile solid cooling medium. The cooling chamber has a volatile solid cooling medium loading and unloading port, a gas pipeline inlet and outlet, and an interface for installing the safety protection device. The gas pipeline is made of thermally conductive material and adopts a serpentine layout inside the cooling chamber. The safety protection device is used to monitor and control the internal air pressure of the heat exchange device, and also to control the connection status between the heat exchange device and the external gas circulation passage. The airflow circulation control device is used to calculate feedback parameters through a temperature control model based on the personalized temperature control parameters, and then control and adjust the flow rate of the circulating airflow in the heat exchange device and the external gas circulation path by combining the feedback parameters.

2. The portable temperature control device suitable for outdoor high-temperature working environments according to claim 1, characterized in that, The cooling cavity is externally insulated to form an insulated cavity.

3. A portable temperature control device suitable for outdoor high-temperature working environments according to claim 1, characterized in that, The volatile solid cooling medium is dry ice.

4. A portable temperature control device suitable for outdoor high-temperature working environments according to claim 1, characterized in that, The safety protection device includes: A gas discharge valve, installed in a heat exchange device and having a pressure limiting function, is used to monitor and control the internal gas pressure of the heat exchange device; In addition, an airflow circulation valve for controlling the connection between the heat exchange device and the external gas circulation passage is provided, which can cut off the connection between the heat exchange device and the external gas circulation passage by closing the airflow circulation valve with one button.

5. A portable temperature control device suitable for outdoor high-temperature working environments according to claim 1, characterized in that, The airflow circulation control device includes: an airflow regulating device, an airflow driving device, a temperature monitoring unit, and a central data aggregation and processing unit; wherein: The temperature monitoring unit is located at the connection between the heat exchange device and the external gas circulation path, and in the external gas circulation path, and feeds back the monitored temperature to the central data aggregation and processing unit. The airflow regulating device is located at the connection between the heat exchange device and the external gas circulation passage, and is used to adjust the size of the airflow valve in conjunction with the airflow driving device and the feedback parameters. The airflow drive device is located at the connection between the heat exchange device and the external gas circulation passage. It is used to drive the circulating airflow, control the drive magnitude in combination with feedback parameters, and monitor the flow rate of the circulating gas and feed it back to the central data collection and processing unit. The opening and closing of the circulating airflow or the adjustment of the flow rate of the circulating airflow are realized by the coordination of the drive magnitude and the size of the airflow valve. The central data aggregation and processing unit is used to combine the monitored temperature, the monitored circulating gas flow rate, and the personalized temperature control parameters to calculate feedback parameters through a temperature control model.

6. A portable temperature control device suitable for outdoor high-temperature working environments according to claim 5, characterized in that, The temperature monitoring unit is located at the connection between the outlet of the heat exchange device and the inlet of the external gas circulation passage. The airflow regulating device is located at the connection between the outlet of the heat exchange device and the inlet of the external gas circulation passage, and at the connection between the outlet of the external gas circulation passage and the inlet of the heat exchange device. The airflow drive device is located at the connection between the outlet of the external gas circulation passage and the inlet of the heat exchange device.

7. A portable temperature control device suitable for outdoor high-temperature working environments according to claim 5, characterized in that, The control and adjustment of the heat exchange device and the external gas circulation path based on the feedback parameters includes the on / off state of the circulating airflow or the flow rate of the circulating airflow. The personalized temperature control parameters include: temperature control speed and target temperature; When the temperature is higher than the target cooling temperature, the generated feedback signal is used to increase the size of the airflow valve and / or increase the drive size to increase the flow rate of the circulating airflow. When the temperature reaches or the difference from the target temperature is less than the set value, the generated feedback signal is used to reduce the size of the airflow valve and / or reduce the drive size to reduce the flow rate of the circulating airflow; or, to close the airflow valve and / or stop the airflow drive device to shut off the circulating airflow. Furthermore, by combining the monitored flow rate of the circulating gas with the temperature control rate, the control quantity in the feedback signal used to adjust the size of the airflow valve and the driving force is adjusted.

8. A portable temperature control device suitable for outdoor high-temperature working environments according to claim 1, characterized in that, The feedback parameters calculated using the temperature control model include: Based on the required temperature control accuracy, either a single feedback control algorithm or a feedback control algorithm with a filter is selected as the temperature control model to calculate the feedback parameters.

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