Portable temperature control equipment suitable for outdoor high-temperature operation environment

Abstract

The invention discloses a portable temperature control device suitable for an outdoor high-temperature operation environment, which adopts a volatile solid cooling medium, and realizes continuous, efficient, accurate and effective temperature control through feedback regulation of circulating airflow. The volatile solid cooling medium is exhausted in a gas form after sublimation, so that the weight of equipment can be reduced, and discomfort caused by the fact that a liquid refrigerant is possibly adhered to the surface of skin is avoided, and therefore, the portability and the use comfort are improved; the whole equipment is low in noise and vibration and easy and convenient to operate, and the feasibility of practical application is improved. The equipment is suitable for the power industry, building construction, mine operation, outdoor sports and other high-temperature operation environments, and can meet the cooling requirements of individuals in the high-temperature environment.

Description

Technical Field

[0001] The present invention relates to the technical field of wearable temperature control equipment, and in particular to a portable temperature control equipment suitable for outdoor high-temperature working environments. Background Art

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

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

[0004] 1) Ice / water storage technology.

[0005] Ice / water storage technology achieves rapid cooling through the phase change heat absorption of ice packs or coolant. Typical products use ice packs filled inside clothing to absorb body heat by sticking to the skin to achieve cooling.

[0006] Disadvantages: This type of technology has a significant cooling effect, but the duration is limited. When the ice or coolant completely melts, the cooling effect almost disappears. Frequent replacement of cooling media not only increases the complexity of operation, but also reduces the convenience of use. In addition, the ice pack needs to be close to the skin to significantly feel the cooling, which may affect the user's comfort.

[0007] 2) Air cooling technology.

[0008] Air cooling technology uses built-in fans to generate airflow, increase sweat evaporation, and enhance heat dissipation. Typical products embed fans in clothing to remove heat through air circulation.

[0009] Disadvantages: Although air cooling technology is low-cost, in extremely hot environments, the fan may blow hot air, which may make the user more uncomfortable. In addition, this technology is highly dependent on the user's body sweating. If the user wears multiple layers of clothing or does not sweat enough, the cooling effect will be significantly reduced.

[0010] 3) Compressor refrigeration technology.

[0011] Compressor refrigeration technology uses a micro compressor to circulate refrigerant to achieve a continuous cooling effect. This type of technology usually embeds refrigeration pipes in the clothing and attaches a micro compressor module to the outside of the clothing.

[0012] Disadvantages: Although compressor refrigeration technology has a significant cooling effect and can run for a long time, the equipment is large in size and weight, and has poor portability. Users will feel uncomfortable wearing it for a long time. In addition, the equipment is noisy when running, which may affect the working environment.

[0013] 4) Chemical refrigeration technology.

[0014] Chemical refrigeration technology achieves a short-term cooling effect by absorbing body heat through the endothermic reaction of chemicals, such as cold gel packs or cooling powders.

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

[0016] In summary, the application of existing refrigeration and temperature control clothing products in high-temperature working environments has the following main problems:

[0017] a) The continuous cooling time is limited, which makes it difficult to meet the needs of long-term high-temperature operations;

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

[0019] c) The portability and comfort are poor, which affects the operator's experience of long-term use;

[0020] d) Some technologies have problems with noise, vibration or operational complexity, which reduces the feasibility of practical application.

[0021] Therefore, it is urgent to develop a portable temperature control technology for temperature control clothing in high-temperature working environments. This technology needs to have continuous and efficient cooling capabilities, while also being portable and comfortable to meet the needs of long-term work in high-temperature environments. Through innovative technical design, the limitations of existing technologies can be resolved to provide safer and more comfortable working conditions for workers working in high temperatures. Summary of the invention

[0022] The purpose of the present invention is to provide a portable temperature control device suitable for outdoor high-temperature working environments, which has continuous and efficient cooling capabilities, and is portable, comfortable and feasible for practical application.

[0023] The objective of the present invention is achieved through the following technical solutions:

[0024] A portable temperature control device suitable for outdoor high-temperature working environment, comprising: a heat exchange device, an external gas circulation passage, an air flow circulation control device and a safety protection device; wherein:

[0025] The heat exchange device is connected end to end with the external gas circulation passage, the heat exchange device is used to realize heat exchange between the circulating gas flow and the volatile solid cooling medium, and the external gas circulation passage is used to realize heat exchange between the circulating gas output by the heat exchange device and the external heat exchange unit;

[0026] 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 between the heat exchange device and the external gas circulation passage;

[0027] The airflow circulation control device is used to calculate feedback parameters through a temperature control model according to individually set temperature control parameters, and control the on and off of the circulating airflow or adjust the flow rate of the circulating airflow in the heat exchange device and the external gas circulation path in combination with the feedback parameters.

[0028] It can be seen from the technical solution provided by the present invention that a volatile solid cooling medium is used, and the circulating airflow is adjusted by feedback to achieve continuous, efficient, precise and effective temperature control; the volatile solid cooling medium is discharged in the form of gas after sublimation, which can reduce the weight of the equipment and avoid the discomfort of liquid refrigerant adhering to the skin surface, thereby improving portability and comfort of use; the whole equipment has low noise and vibration, and is easy to operate, which improves the feasibility of practical application. The equipment can be used in the power industry, construction, mining operations, outdoor sports and other high-temperature working environments, and can meet the cooling needs of individuals in high-temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0030] Figure 1 A schematic diagram of a framework of a portable temperature control device suitable for outdoor high-temperature working environments provided by an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the structure of a portable temperature control device suitable for outdoor high-temperature working environments provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0033] First, the terms that may be used in this article are explained as follows:

[0034] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0035] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

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

[0037] Unless otherwise specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0038] The portable temperature control device suitable for outdoor high-temperature working environment provided by the present invention is described in detail below. The contents not described in detail in the embodiments of the present invention belong to the prior art known to professional and technical personnel in this field. If no specific conditions are specified in the embodiments of the present invention, the conventional conditions in the field or the conditions recommended by the manufacturer shall be followed. The cooling medium or instrument used in the embodiments of the present invention, if the manufacturer is not specified, are all conventional products that can be purchased commercially.

[0039] Embodiment 1

[0040] The present invention provides a portable temperature control device suitable for outdoor high temperature working environment, such as Figure 1 As shown, it mainly includes: a heat exchange device, an external gas circulation passage, an air flow circulation control device and a safety protection device; wherein:

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

[0042] Preferably, the volatile solid cooling medium can be dry ice (solid carbon dioxide). Under normal temperature and pressure, the temperature of dry ice is as low as -78.5°C. Compared with the comfortable temperature range of the human body (e.g., about 25°C), there is a significant temperature gradient, which effectively solves the problem of difficult cooling or slow cooling rate in high temperature environment. Compared with traditional cooling sources such as ice cubes, the cooling effect of dry ice is more significant, and its cooling process is more efficient and lasting.

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

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

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

[0046] Exemplarily, the external heat exchange unit may be a work suit.

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

[0048] Preferably, the safety protection device includes: a gas discharge valve provided in the heat exchange device and having a pressure limiting function. And, an airflow circulation valve for controlling the connection state between the heat exchange device and the external gas circulation passage, so as to realize one-key closing of the airflow circulation valve in an emergency situation (such as when the temperature of the external heat exchange unit is too low). For example, when a component of the equipment fails and causes the temperature of the external gas circulation passage to be low, in order to avoid user discomfort or injury, the airflow circulation valve can be closed with one key (manually or automatically, or a combination of the two) to cut off the connection state between the heat exchange device and the external gas circulation passage. The above-mentioned airflow circulation valve can be provided at the connection between the heat exchange device and one side of the external gas circulation passage according to actual conditions (through Figure 1 The safety protection device is shown by the broken line on the right side), for example, it can be arranged at the connection between the outlet of the heat exchange device and the inlet of the external gas circulation passage, or it can be arranged at the connection between the outlet of the external gas circulation passage and the inlet of the heat exchange device.

[0049] (3) The airflow circulation control device is used to calculate feedback parameters through a temperature control model according to personalized temperature control parameters, and control the heat exchange device and the external gas circulation path to open and close the circulating airflow or adjust the flow rate of the circulating airflow in combination with the feedback parameters.

[0050] Preferably, the airflow circulation control device comprises: an airflow regulating device, an airflow driving device, a temperature monitoring unit and a central data summary processing unit; wherein:

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

[0052] The airflow regulating device is disposed at the connection point between the heat exchange device and the external gas circulation passage (specifically, it can be the connection point between the heat exchange device outlet and the external gas circulation passage inlet, and the connection point between the external gas circulation passage outlet and the heat exchange device inlet), and is used to adjust the size of the airflow valve in combination with the airflow driving device and the feedback parameter;

[0053] The airflow driving device is arranged at the connection point between the heat exchange device and the external gas circulation passage (specifically, it can be the connection point between the outlet of the external gas circulation passage and the inlet of the heat exchange device), and is used to drive the circulating airflow, control the driving size in combination with the feedback parameters, and monitor the flow rate of the circulating gas and feed it back to the central data summary processing unit; the circulating airflow is turned on and off or the flow rate of the circulating airflow is adjusted by the coordination of the driving size and the size of the airflow valve;

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

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

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

[0057] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the device provided by the embodiment of the present invention is described in detail with reference to a specific embodiment below.

[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°C. Compared with the temperature range that the human body perceives as comfortable (such as 25°C), there is a larger temperature gradient, so the problem of difficulty in lowering the temperature or the rate of reduction being too slow can be effectively avoided. Compared with cooling sources 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), the air flow temperature is reduced from 40°C to 25°C. Combined with the specific heat capacity of air (about 1005 J / kg·°C) and the density of air (about 1.225 kg / m 3 ), it can be calculated that the amount of heat required to be absorbed per minute is about 185J. Combined with the latent heat of sublimation of dry ice (571kJ / kg, or 571,000J / kg), it can be further calculated that about 0.323 grams of dry ice needs to be sublimated per minute to absorb this heat. Based on this calculation, ideally, one pound (500g) of dry ice can continue to cool for about 25.8 hours, so it has high portability and refrigeration efficiency. After sublimation, dry ice is discharged in the form of gas, which does not increase the weight of the equipment, and avoids the problem of liquid refrigerant media possibly adhering to the skin surface, thereby improving the comfort of use.

[0059] In this embodiment, the structure of the entire device and the internal working principle of the device are mainly introduced.

[0060] 1. Equipment structure.

[0061] like Figure 2 As shown, the structure of the entire device is shown, and some of its descriptions are as follows:

[0062] ① An airflow regulating device, for example, an airflow regulating valve, can control the on-off or flow of the circulating airflow by adjusting the valve size, and realize precise airflow regulation through the feedback parameter (feedback signal) control of the central data aggregation processing unit.

[0063] ② is an air flow driving device, for example, including a blower and a gas flow meter. The blower is mainly used to drive the circulating airflow. The flow rate of the circulating airflow can be controlled by adjusting the driving size, and is also controlled by the feedback parameters of the central data summary 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 summary processing unit.

[0064] ③ is a gas pipeline, which can be made of a material with good thermal conductivity (for example, a copper tube) and arranged in a serpentine shape in the cooling cavity to increase the contact area with the cooling medium, thereby improving the heat exchange efficiency.

[0065] ④ is a cooling cavity, the exterior of which is designed with insulating materials to form an insulating cavity, and the interior of which is provided with a dry ice loading and unloading port (not shown in the figure), a circulating air flow duct inlet and outlet, and an internal air pressure monitoring and release port. The circulating gas is cooled through the cooling cavity.

[0066] In this embodiment, the cooling cavity ④ can be designed to be detachable. When the dry ice in the cooling cavity is insufficient, a new cooling cavity can be directly replaced to improve the portability and operational convenience of the device. Of course, during field operations, 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 used directly, or other types of gas can be used, which is not limited in the present invention.

[0068] ⑤ is a safety protection device, including: a gas discharge valve with a pressure limiting function, for example, a pressure release safety valve, which is used to release excess carbon dioxide gas when the air pressure inside the cooling cavity exceeds the safety threshold to prevent the cavity pressure from being too high. It also includes an airflow circulation valve that controls the connection state between the heat exchange device and the external gas circulation passage. Under normal circumstances, it is in an open state so that the heat exchange device is connected to the external gas circulation passage. In an emergency, the connection state between the heat exchange device and the external gas circulation passage can be cut off by closing the airflow circulation valve with one button. The airflow circulation valve is not shown in the figure. As mentioned above, the airflow circulation valve can be set at the connection between the heat exchange device and one side of the external gas circulation passage according to actual conditions. Of course, in the specific implementation process, the aforementioned airflow regulating device ① can also be configured as an airflow regulating device with a safety protection function, that is: the airflow regulating device with a safety protection function serves as an airflow circulation valve in the safety protection device, which is responsible for activating the one-button closing function under set conditions (for example, emergency situations such as the temperature of the external heat exchange unit is too low) to cut off the connection between the heat exchange device and the external gas circulation path; at the same time, it also serves as an airflow regulating device in the airflow circulation control device, which is responsible for the on-off or flow control of the circulating airflow under normal circumstances.

[0069] ⑥ is a temperature monitoring unit, for example, a temperature sensor, which is provided in plurality and distributed in different key positions, collects air flow temperature data in real time and feeds it back to the central data aggregation processing unit for temperature control.

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

[0071] ⑧Feedback control loop: It is mainly used to transmit feedback parameters (feedback signal) to control the airflow regulating valve and blower, and achieve precise temperature control through closed-loop control.

[0072] ⑨ is the central data summary processing unit, which is the core control unit of the entire device. It 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 uses the built-in temperature control model to calculate the feedback parameters.

[0073] ⑩ is an external heat exchange unit, which is used in specific working scenarios to achieve working temperature control requirements by exchanging heat with the circulating gas. Exemplarily, the external heat exchange unit can be a working chamber, working clothes, external environment, etc.

[0074] Those skilled in the art can understand that the airflow regulating device ①, the airflow driving device ② and the central data aggregation processing unit ⑨ can be powered by separate power modules. This part of the design can be implemented with reference to conventional technology and will not be elaborated in the present invention.

[0075] 2. Internal working principle of the equipment.

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

[0077] 1) Airflow path design.

[0078] The airflow flows through the cooling cavity ④ through the serpentine airflow duct ③. The serpentine airflow duct ③ is designed to increase the contact area between the airflow and the cooling medium to improve the heat exchange efficiency.

[0079] 2) Cooling cavity design.

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

[0081] 2. Safety air pressure adjustment.

[0082] 1) Pressure release mechanism.

[0083] The equipment is equipped with a pressure release valve ⑤. When the internal air pressure of the cooling cavity ④ exceeds the preset safety threshold, the valve ⑤ will release excess gas in time to prevent the occurrence of safety accidents.

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

[0085] 1) Feedback regulation loop configuration.

[0086] Airflow regulating valve ①: used to control the on / off or flow rate of airflow. Blower and gas flow meter ②: drive airflow and monitor airflow velocity, and the flow rate data can be fed back to the central processor ⑨ in real time. Temperature monitoring unit ⑥ (multiple positions): monitors airflow temperature at multiple key positions. Central data summary processing unit ⑨: receives 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 in combination with the set temperature control speed and target temperature, which are transmitted to the airflow regulating valve and blower through the feedback control loop ⑧ to adjust the operating status of the airflow valve ① and the 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 airflow valve size and / or increase the drive size to increase the flow rate of the circulating airflow, thereby accelerating the cooling process.

[0089] When the temperature reaches or is less than the set value from the target temperature, the feedback signal generated by the central data aggregation processing unit ⑨ 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, close the airflow valve and / or stop the airflow drive device to close the circulating airflow to maintain temperature stability.

[0090] Furthermore, the central data summary processing unit ⑨ adjusts the control amount in the feedback signal for adjusting the size of the airflow valve and the drive size in combination with the monitored flow rate of the circulating gas and the temperature control speed.

[0091] 4. High-precision temperature control.

[0092] This section can be implemented as an optional solution. Specifically, the airflow adjustment algorithm can be optimized:

[0093] On the one hand, the airflow adjustment algorithm can be further optimized according to the actual temperature control accuracy requirements.

[0094] On the other hand, in high-precision temperature control applications, the Kalman filter and PID control (proportional-integral-differential control) can be combined to achieve more precise airflow control to meet the needs of application scenarios with higher temperature regulation accuracy.

[0095] The relevant temperature control algorithms involved in this section can be implemented through conventional technologies, so they will not be described in detail.

[0096] The above-mentioned equipment provided by the embodiment of the present invention is a portable cooling method based on circulating airflow, combined with volatile solid cooling medium, and cleverly combines the airflow circulation control system and the efficient heat exchange design, effectively solving the cooling problem in high-temperature working environments. Its main advantages are: 1) It has efficient and lasting cooling capabilities. Taking dry ice as an example, its low temperature characteristics and large sublimation latent heat ensure long-term and high-intensity refrigeration effects; 2) Safety and reliability are significantly improved, and the pressure release safety valve and real-time feedback adjustment mechanism ensure the stable operation of the system; 3) It is both portable and comfortable. There is no liquid residue after dry ice sublimation, and the cooling cavity can be quickly replaced, which is convenient for field operations; 4) It realizes precise temperature control to meet the needs of high-precision temperature control; 5) The usage mode is flexible and changeable, and it is suitable for a variety of high-temperature working scenarios; 5) It has high energy efficiency and good environmental protection, does not rely on electric energy for refrigeration, and automatically adjusts the airflow to reduce energy waste.

[0097] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A portable temperature control device suitable for outdoor high temperature working environment, characterized in that: include: Heat exchange device, external gas circulation passage, air flow circulation control device and safety protection device; wherein: The heat exchange device is connected end to end with the external gas circulation passage, the heat exchange device is used to realize heat exchange between the circulating gas flow and the volatile solid cooling medium, and the external gas circulation passage is used to realize heat exchange between the circulating gas output by the heat exchange device and the external heat exchange unit; 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 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 according to individually set temperature control parameters, and control the on and off of the circulating airflow or adjust the flow rate of the circulating airflow in the heat exchange device and the external gas circulation path in combination with the feedback parameters.

2. A portable temperature control device suitable for outdoor high-temperature working environment according to claim 1, characterized in that: The heat exchange device comprises: a cooling cavity and a gas pipeline; the gas pipeline is arranged inside the cooling cavity, and a volatile solid cooling medium is arranged inside the cooling cavity; The heat-insulating cavity is provided with a loading and unloading port for a volatile solid cooling medium, an inlet and outlet of a gas pipeline, and an interface for installing the safety protection device.

3. A portable temperature control device suitable for outdoor high-temperature working environment according to claim 2, characterized in that: The gas pipeline is made of a conductive material and is arranged in a serpentine shape in the cooling cavity.

4. A portable temperature control device suitable for outdoor high-temperature working environment according to claim 2, characterized in that: The outside of the cooling cavity is made of insulating material to form an insulating cavity.

5. A portable temperature control device suitable for outdoor high-temperature working environment according to claim 1 or 2, characterized in that: The volatile solid cooling medium is dry ice.

6. A portable temperature control device suitable for outdoor high-temperature working environment according to claim 1, characterized in that: The safety protection device comprises: A gas discharge valve with a pressure limiting function installed in a heat exchange device, used to monitor and control the internal gas pressure of the heat exchange device; Furthermore, the airflow circulation valve used to control the connection state between the heat exchange device and the external gas circulation passage can cut off the connection state between the heat exchange device and the external gas circulation passage by closing the airflow circulation valve with one button.

7. A portable temperature control device suitable for outdoor high-temperature working environment according to claim 1, characterized in that: The airflow circulation control device comprises: an airflow regulating device, an airflow driving device, a temperature monitoring unit and a central data summary processing unit; wherein: The temperature monitoring unit is arranged at the connection point between the heat exchange device and the external gas circulation passage, and in the external gas circulation passage, and feeds back the monitored temperature to the central data summary processing unit; The airflow regulating device is arranged at the connection point between the heat exchange device and the external gas circulation passage, and is used to adjust the size of the airflow valve in combination with the airflow driving device and the feedback parameter; The airflow driving device is arranged at the connection point between the heat exchange device and the external gas circulation passage, and is used to drive the circulating airflow, control the driving size in combination with the feedback parameters, and monitor the flow rate of the circulating gas and feed it back to the central data summary processing unit; the circulating airflow is turned on and off or the flow rate of the circulating airflow is adjusted by the coordination of the driving size and the size of the airflow valve; The central data aggregation processing unit is used to calculate feedback parameters through a temperature control model by combining the monitored temperature, the monitored flow rate of the circulating gas and the personalized temperature control parameters.

8. A portable temperature control device suitable for outdoor high-temperature working environment according to claim 7, characterized in that: The temperature monitoring unit is arranged at the connection point between the heat exchange device and the external gas circulation passage, including: the temperature monitoring unit is arranged at the connection point between the heat exchange device outlet and the external gas circulation passage inlet; The airflow regulating device is arranged at the connection point between the heat exchange device and the external gas circulation passage, including: the airflow regulating device is arranged at the connection point between the heat exchange device outlet and the external gas circulation passage inlet, and at the connection point between the external gas circulation passage outlet and the heat exchange device inlet; The airflow driving device is arranged at the connection point between the heat exchange device and the external gas circulation passage, including: the airflow driving device is arranged at the connection point between the external gas circulation passage outlet and the heat exchange device inlet.

9. A portable temperature control device suitable for outdoor high-temperature working environment according to claim 7, characterized in that: Controlling and adjusting the heat exchange device and the external gas circulation passage in combination with the feedback parameter to switch on and off the circulating gas flow or the flow rate of the circulating gas flow includes: 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 airflow valve size and / or increase the drive size to increase the flow rate of the circulating airflow; When the temperature reaches or is less than the set value from the target temperature, 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, close the airflow valve and / or stop the airflow drive device to close the circulating airflow; Furthermore, the control amount in the feedback signal for adjusting the size of the airflow valve and the drive size is adjusted in combination with the monitored flow rate of the circulating gas and the temperature control speed.

10. The portable temperature control device suitable for outdoor high-temperature working environment according to claim 1, characterized in that: The calculation of feedback parameters by the temperature control model includes: According to the temperature control accuracy requirements, 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.

Images