Self-cooling system of carbon dioxide heat pump control cabinet

Abstract

The utility model provides a carbon dioxide heat pump control cabinet self-cooling system which comprises a carbon dioxide heat pump loop which comprises a compression device, a cooling device, a throttling device and an evaporation device which are mutually connected through a first pipeline, carbon dioxide is cooled to a preset temperature area in the cooling device, and the cooling device is provided with a first inlet and a first outlet; the compression device comprises a second inlet and a second outlet. The carbon dioxide heat pump loop further comprises a first section located between the first outlet and the second inlet and a second section located between the second outlet and the first inlet. And the cooling loop comprises a control cabinet heat exchange part and a second pipeline, the control cabinet heat exchange part is connected between the first outlet and the second inlet through the second pipeline and connected with the first section in parallel, and the control cabinet heat exchange part is used for making contact with the control cabinet for heat exchange. Based on the working loop of the carbon dioxide heat pump, the cooling loop is added, and the control cabinet is effectively cooled by utilizing the high-efficiency heat exchange characteristic of the carbon dioxide heat pump.

Description

Technical Field

[0001] This application belongs to the field of electrical equipment cooling technology, and in particular relates to a self-cooling system for a carbon dioxide heat pump control cabinet. Background Technology

[0002] Control cabinets play a crucial role in industrial production and automation control, housing various electrical components such as controllers, relays, contactors, and frequency converters. These components generate a significant amount of heat during operation. If heat cannot be dissipated effectively and promptly, the temperature inside the control cabinet will rise, affecting the performance and lifespan of the electrical equipment, and potentially even causing malfunctions and safety accidents.

[0003] Carbon dioxide heat pump units are usually placed outdoors. Traditional cooling methods for control cabinets mainly include natural ventilation and forced ventilation. These methods have problems such as limited cooling effect and high energy consumption, especially in summer when the cooling effect is even worse. Utility Model Content

[0004] In view of the above problems, this application provides a self-cooling system for a carbon dioxide heat pump control cabinet, which can improve cooling efficiency.

[0005] This application provides a self-cooling system for a carbon dioxide heat pump control cabinet, comprising: a carbon dioxide heat pump circuit including a compression device, a cooling device, a throttling device, and an evaporation device interconnected by a first pipeline; the compression device having a first inlet and a first outlet; the evaporation device having a second inlet and a second outlet; the carbon dioxide heat pump circuit further including a first section located between the second outlet and the first inlet and a second section located between the first outlet and the second inlet; and a cooling circuit including a control cabinet heat exchange section and a second pipeline; the control cabinet heat exchange section being connected between the second outlet and the first inlet via the second pipeline and connected in parallel with the first section; the control cabinet heat exchange section being used to contact the control cabinet for heat exchange.

[0006] According to an embodiment of this application, the carbon dioxide heat pump control cabinet self-cooling system further includes a control cabinet, which is communicatively connected to the carbon dioxide heat pump circuit and the cooling circuit respectively, so as to control the operation of the carbon dioxide heat pump circuit and the cooling circuit.

[0007] According to an embodiment of this application, the heat exchange section of the control cabinet includes heat exchange pipes and a plurality of spaced-apart heat dissipation fins. The heat exchange pipes are connected to a second pipe and are spaced along the extension direction of the heat dissipation fins. The two ends of the heat dissipation fins in their extension direction are attached to the outer shell of the control cabinet. Optionally, a ventilation device is provided around the heat exchange section of the control cabinet. The ventilation device is used to accelerate the heat exchange between the heat exchange section of the control cabinet and the control cabinet.

[0008] According to an embodiment of this application, a first control valve is provided in the first section of the first pipeline, and a second control valve is provided in the second pipeline. The first control valve is used to control the first pipeline to close according to the temperature adjustment needs of the control cabinet, while the second control valve controls the second pipeline to open, so that the carbon dioxide working fluid can enter the heat exchange section of the control cabinet for heat exchange; or when the control cabinet is in a suitable temperature range, the first control valve controls the first pipeline to open, while the second control valve controls the second pipeline to close, so that the carbon dioxide working fluid can work in the carbon dioxide heat pump circuit.

[0009] According to an embodiment of this application, it further includes a temperature sensing component. When the temperature signal from the temperature sensing component is higher than a first set value, the control cabinet controls the first control valve to close the first section and controls the second control valve to open the second pipeline. When the temperature signal from the temperature sensing component is lower than a second set value, the control cabinet controls the first control valve to open the first section and controls the second control valve to close the second pipeline.

[0010] According to an embodiment of this application, the heat exchange section of the control cabinet is connected to the control cabinet via a retractable connecting device. The retractable connecting device allows the heat exchange section of the control cabinet to be adjusted relative to the control cabinet to adapt to different installation spaces and heat dissipation requirements.

[0011] According to an embodiment of this application, the heat exchange section of the control cabinet is provided with a protruding structure or a groove structure corresponding to the control cabinet. The heat exchange section of the control cabinet is embedded in the protrusion or docked with the control cabinet through the groove, thereby closely fitting the outer surface of the control cabinet to achieve efficient heat exchange.

[0012] According to an embodiment of this application, the top of the control cabinet is provided with at least one ventilation hole, and the heat exchange part of the control cabinet is disposed on the top of the control cabinet and is disposed opposite to the ventilation hole.

[0013] According to an embodiment of this application, the control cabinet contains a humidity sensing component and a dehumidification device. When the humidity signal from the humidity sensing component is higher than a set value, the control cabinet controls the dehumidification device to perform dehumidification.

[0014] According to an embodiment of this application, the self-cooling system of the carbon dioxide heat pump control cabinet further includes a heat recovery device, which exchanges heat with the first section and the second section respectively.

[0015] The self-cooling system for the carbon dioxide heat pump control cabinet in this embodiment fully utilizes the cooling medium in the carbon dioxide heat pump circuit, eliminating the need for additional cooling equipment and energy consumption. Through ingenious piping design and parallel connection, effective heat recovery and reuse are achieved, improving the overall system's energy efficiency. Compared to traditional control cabinet cooling methods, such as air-cooled or water-cooled systems, this self-cooling system significantly reduces energy consumption and saves operating costs.

[0016] Because the system directly utilizes the medium in the carbon dioxide heat pump circuit for heat exchange, it reduces complex external cooling equipment and connecting pipelines, lowering the risk of system failure. Simultaneously, the heat exchange section of the control cabinet cools the cabinet, ensuring that the electronic components inside always operate within a suitable temperature range, thus improving the system's reliability and stability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of a self-cooling system for a carbon dioxide heat pump control cabinet provided in this application embodiment;

[0019] Figure 2 A schematic diagram of another self-cooling system for a carbon dioxide heat pump control cabinet provided in this application embodiment;

[0020] Figure 3 A schematic diagram of the structure of another self-cooling system for a carbon dioxide heat pump control cabinet provided in an embodiment of this application;

[0021] Figure 4 A schematic diagram of the structure of another self-cooling system for a carbon dioxide heat pump control cabinet provided in an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the structure of the heat exchange section of the control cabinet provided in some embodiments of this application;

[0023] Figure 6 The diagram shows the structure of a control cabinet provided in some embodiments of this application.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100. First pipeline; 101. First section; 102. Second section;

[0026] 110. Compression device; 111. First inlet; 112. First outlet;

[0027] 120. Cooling device; 130. Throttling device; 140. Evaporation device; 141. Second inlet; 142. Second outlet; 150. First control valve; 160. Regeneration device;

[0028] 200, Second piping; 210, Heat exchange section of control cabinet; 211, Heat exchange piping; 212, Heat dissipation fins; 220, Second control valve; 230, Ventilation equipment; 300, Control cabinet. Detailed Implementation

[0029] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0031] A heat pump system is a highly efficient energy conversion and utilization system. Based on thermodynamic principles, it transfers heat energy from a low-grade heat source to a high-grade heat source by consuming high-grade energy, such as electrical energy. Specifically, the working medium in the heat pump unit absorbs heat energy from a low-temperature heat source in the evaporator, and after the compressor increases its temperature and pressure, it releases heat energy in the condenser, thus achieving the transfer of heat energy.

[0032] In modern industrial and commercial applications, carbon dioxide (CO2) heat pump technology has gradually gained widespread attention due to its high efficiency and environmental friendliness. A CO2 heat pump system is a heat pump system that uses carbon dioxide as its working medium. The working principle of a CO2 heat pump system is similar to other heat pump systems; it uses a cyclic compression refrigeration process to transfer heat absorbed by a low-temperature heat source, such as groundwater or geothermal energy, to a high-temperature heat source, such as for heating or hot water. CO2 heat pump systems have high thermal efficiency, fully utilizing the heat energy in low-temperature heat sources and converting it into high-temperature heat energy, thus achieving high energy efficiency. As a natural refrigerant, carbon dioxide has almost zero ozone depletion potential and a low global warming potential, meeting environmental protection requirements. As a natural refrigerant, carbon dioxide has zero ozone depletion potential (ODP) and a low global warming potential (GWP), making it environmentally friendly. Using carbon dioxide as a cooling medium complies with current environmental policies, helps reduce greenhouse gas emissions, and protects the ecological environment.

[0033] However, during the operation of a carbon dioxide heat pump, the control cabinet, as a core control component, is crucial to the overall system performance due to its stable operation. Excessive temperatures can affect the lifespan and performance of the electronic components within the control cabinet, and may even lead to system failure. Therefore, developing a highly efficient self-cooling system for the carbon dioxide heat pump control cabinet is of significant practical importance.

[0034] In view of this, this application provides a self-cooling system for a carbon dioxide heat pump control cabinet, which can effectively cool the control cabinet, ensure the stable operation of electrical equipment inside the control cabinet, and improve the operational reliability and lifespan of the electrical equipment.

[0035] Please see Figure 1 and Figure 2 This application provides a self-cooling system for a carbon dioxide heat pump control cabinet, including a carbon dioxide heat pump circuit and a cooling circuit. The carbon dioxide heat pump circuit includes a compression device 110, a cooling device 120, a throttling device 130, and an evaporation device 140 interconnected by a first pipeline 100. The compression device 110 has a first inlet 111 and a first outlet 112. The evaporation device 140 includes a second inlet 141 and a second outlet. The carbon dioxide heat pump circuit also includes a first section 101 located between the second outlet and the first inlet 111 and a second section 102 located between the first outlet 112 and the second inlet 141. The cooling circuit includes a control cabinet heat exchange section 210 and a second pipeline. The control cabinet heat exchange section 210 is connected between the second outlet and the first inlet 111 via the second pipeline and is connected in parallel with the first section 101. The control cabinet heat exchange section 210 is used to contact the control cabinet for heat exchange.

[0036] In this embodiment, the carbon dioxide heat pump circuit is the foundation of the entire system. It mainly consists of a compression device 110, a cooling device 120, a throttling device 130, and an evaporation device 140. These components are connected to each other in sequence through the first pipeline 100 to form a complete circulation loop.

[0037] The function of the compression device 110 is to compress carbon dioxide gas, increasing its pressure and temperature. The compression device 110 has a first inlet 111 and a first outlet 112. Low-temperature, low-pressure gaseous carbon dioxide enters the compression device 110 through the first inlet 111. Under the action of the compression device 110, the carbon dioxide gas is compressed, the distance between molecules decreases, and molecular motion intensifies, transforming the carbon dioxide into a high-temperature, high-pressure gas, preparing it for the subsequent exothermic process in the condensation device. For example, common compressors employ a piston or screw type structure, using mechanical motion to compress low-temperature, low-pressure carbon dioxide gas into a high-temperature, high-pressure gas. The first outlet 112 is used to output the high-temperature, high-pressure gas and transport it to the cooling device 120 via the first pipeline 100.

[0038] High-temperature, high-pressure carbon dioxide gas enters the cooling device 120. Within the cooling device 120, the carbon dioxide heats the heated medium (such as air or water) to a preset temperature range, while simultaneously cooling itself. During this process, the high-temperature, high-pressure carbon dioxide gas transfers heat through heat exchange with the heated medium (such as air or water), thus lowering its own temperature. The carbon dioxide in the cooling device 120 primarily undergoes an isobaric heat release process, maintaining a pressure essentially at the high pressure of the first outlet 112, although there may be some slight pressure loss. The carbon dioxide gas gradually cools within the cooling device 120, and the medium-temperature, high-pressure carbon dioxide is output through the outlet of the cooling device. The cooling device 120 can be designed in various ways, such as using a shell-and-tube heat exchanger, where the carbon dioxide flows inside the tubes and the cooling medium flows counter-currently in the shell side to achieve efficient heat exchange. In this application, "medium temperature" refers to the temperature state after heat exchange and cooling, relative to the high-temperature state after compression by the compression device.

[0039] The gradually cooled carbon dioxide gas may remain in a gaseous state. In some cases, the gradually cooled carbon dioxide gas may also condense into a liquid state. For example, the cooling device 120 in the embodiments of this application is a condensation device.

[0040] The throttling device 130 is installed between the cooling device 120 and the evaporating device 140. Its function is to cause a sudden pressure drop in the cooled, medium-temperature, high-pressure carbon dioxide as it passes through the throttling device 130. This throttling effect leads to the rapid vaporization of some of the liquid carbon dioxide, further reducing its temperature to a low-temperature state. After passing through the throttling device 130, the carbon dioxide working fluid becomes a low-temperature, low-pressure liquid or gas-liquid two-phase mixture. Various types of throttling devices 130 are available, such as capillary tubes and expansion valves, which can be selected according to the specific requirements and operating conditions of the system.

[0041] In the evaporator 140, the low-temperature, low-pressure liquid carbon dioxide absorbs heat from the surrounding environment, vaporizes, and returns to a low-temperature, low-pressure gas. This gas then returns to the first inlet 111 of the compressor 110, completing one cycle. The evaporator 140 can employ a finned tube heat exchanger, increasing the heat exchange area to improve evaporation efficiency.

[0042] Therefore, when the carbon dioxide heat pump circuit is started, the compression device 110 compresses the low-temperature, low-pressure carbon dioxide gas drawn from the evaporator 140, turning it into a high-temperature, high-pressure gas, which is then discharged through the first outlet 112. The high-temperature, high-pressure carbon dioxide gas enters the cooling device 120 along the first pipeline 100, where it exchanges heat with the heated medium. After being cooled, it flows out of the cooling device at a medium temperature and high pressure. In this embodiment, the carbon dioxide flowing out of the cooling device can be in a supercritical state, or it can be in a liquid state or a gas-liquid coexistence state. Next, the cooled carbon dioxide is depressurized and cooled through the throttling device 130, and then enters the evaporator 140. In the evaporator 140, the carbon dioxide absorbs heat from the surrounding environment, evaporates into a low-temperature, low-pressure gas, and then returns to the first inlet 111 of the compression device 110 through the first pipeline 100. This cycle repeats continuously, realizing the continuous transfer of heat and the working cycle of the heat pump.

[0043] In this embodiment, the cooling circuit is a key part of realizing the self-cooling of the control cabinet. The cooling circuit includes the heat exchange section 210 of the control cabinet and the second pipeline. The number of cooling circuits can be one or more.

[0044] Each cooling circuit may have one or more control cabinet heat exchange units 210, and multiple control cabinet heat exchange units 210 may be connected in parallel in the second pipeline or in series in the second pipeline.

[0045] The heat exchange section 210 of the control cabinet is used to contact the control cabinet and achieve efficient heat exchange. The heat exchange section 210 is connected between the second outlet and the first inlet 111 via a second pipeline and is connected in parallel with the first section 101. This connection allows some of the carbon dioxide output from the second outlet of the evaporator 140 to also enter the heat exchange section 210. Inside the heat exchange section 210, the carbon dioxide absorbs heat from the control cabinet, its temperature rises, and then it flows back to the first inlet 111 of the compressor 110 to enter the next cycle.

[0046] When the self-cooling system of the carbon dioxide heat pump control cabinet is running, after the carbon dioxide passes through the cooling device 120, a portion of the carbon dioxide returns directly to the compression device 110 along the first section 101 pipe, while the other portion enters the heat exchange section 210 of the control cabinet through the second pipe. Within the heat exchange section 210, a temperature difference exists between the carbon dioxide and the control cabinet, and heat is transferred from the control cabinet to the carbon dioxide. As the carbon dioxide absorbs heat, its temperature gradually rises, and it then flows back to the compression device 110 carrying the absorbed heat. In the compression device 110, this heated carbon dioxide mixes with the low-temperature carbon dioxide from the evaporator 140, is compressed and heated again, and enters the next cycle. In this way, the cooling circuit continuously transfers heat from the control cabinet, achieving the self-cooling function of the control cabinet.

[0047] The self-cooling system for the carbon dioxide heat pump control cabinet in this embodiment fully utilizes the cooling medium in the carbon dioxide heat pump circuit, eliminating the need for additional cooling equipment and energy consumption. Through ingenious piping design and parallel connection, effective heat recovery and reuse are achieved, improving the overall system's energy efficiency. Compared to traditional control cabinet cooling methods, such as air-cooled or water-cooled systems, this self-cooling system significantly reduces energy consumption and saves operating costs.

[0048] Because the system directly utilizes the medium in the carbon dioxide heat pump circuit for heat exchange, it reduces complex external cooling equipment and connecting pipelines, lowering the risk of system failure. Simultaneously, the heat exchange section 210 of the control cabinet cools the control cabinet, ensuring that the electronic components inside always operate within a suitable temperature range, thus improving the system's reliability and stability.

[0049] In some embodiments, the carbon dioxide heat pump control cabinet self-cooling system of this application may not include a control cabinet. The control cabinet may be acquired separately, for example, by commercial purchase. The control cabinet and the carbon dioxide heat pump control cabinet self-cooling system of this application are connected through an interface.

[0050] To ensure good compatibility and better collaboration with the self-cooling system of the carbon dioxide heat pump control cabinet, please refer to the following embodiments: Figure 2 and Figure 3The self-cooling system of the carbon dioxide heat pump control cabinet of this application also includes a control cabinet 300, which is communicatively connected to the carbon dioxide heat pump circuit and the cooling circuit to control the operation of the carbon dioxide heat pump circuit and the cooling circuit.

[0051] The carbon dioxide heat pump control cabinet's self-cooling system is a highly efficient and intelligent temperature control system, with the control cabinet 300 playing a central, pivotal role. As the control hub of the entire system, the control cabinet 300 establishes communication connections with both the carbon dioxide heat pump circuit and the cooling circuit. For example, these communication connections are based on advanced communication protocols and intelligent control technology, and are established via communication cables. Through these cables, the control cabinet 300 can receive real-time data from various sensing components in the carbon dioxide heat pump circuit and the cooling circuit, such as real-time operating parameters transmitted by temperature and pressure sensors.

[0052] Please see Figure 5 In some embodiments, the heat exchange section 210 of the control cabinet includes a heat exchange pipe 211 and a plurality of spaced heat dissipation fins 212. The heat exchange pipe 211 is connected to the second pipe 200. The heat exchange pipe 211 is spaced along the extension direction of the heat dissipation fins 211, and the two ends of the heat dissipation fins 212 in their own extension direction are in contact with the outer shell of the control cabinet 300.

[0053] The heat exchange section 210 of the control cabinet consists of heat exchange pipes 211 and multiple spaced heat dissipation fins 212. The heat exchange pipes 211 are connected to the second pipe 200, which carries a low-temperature, low-pressure carbon dioxide working fluid. The connection between the heat exchange pipes 211 and the second pipe 200 allows the cooling medium to flow smoothly into the heat exchange pipes 211 for subsequent heat exchange processes.

[0054] The spaced-apart heat dissipation fins 212 rapidly transfer heat generated inside the control cabinet 300. The heat exchange pipes 211 are spaced apart between the heat dissipation fins 212, allowing the cooling medium to fully exchange heat with the fins 212 during flow. When heat is generated inside the control cabinet 300 due to the operation of electrical components, the heat is transferred to the heat dissipation fins 212 in contact with them. Because the heat dissipation fins 212 have a large surface area, they can quickly dissipate heat into the surrounding environment. Simultaneously, the cooling medium flowing through the heat exchange pipes 211 continuously absorbs the heat transferred from the heat dissipation fins 212, further enhancing the heat dissipation effect.

[0055] The heat dissipation fins 212 are attached to the outer shell of the control cabinet 300 at both ends in their extension direction. On the one hand, this ensures that the heat dissipation fins 212 are closely connected to the heat source inside the control cabinet 300, reducing thermal resistance during heat transfer and improving heat transfer efficiency. On the other hand, by attaching to the outer shell, the heat dissipation fins 212 can directly transfer the absorbed heat to the outer shell of the control cabinet 300, utilizing the large surface area of ​​the outer shell for natural heat dissipation, further enhancing the overall heat dissipation capacity of the control cabinet.

[0056] In this embodiment, the heat exchange section 210 of the control cabinet, which is composed of heat exchange pipes 211 and multiple spaced heat dissipation fins 212, can also be used as the outer wall of the control cabinet 300. In this way, there is no need to reserve an independent space for the heat exchange section 210 of the control cabinet. The heat exchange function is combined with the outer wall structure, making the overall structure of the control cabinet more compact and improving the space utilization rate.

[0057] For example, the heat sink fins 212 are made of a metal material with good thermal conductivity, such as aluminum alloy. Aluminum alloy has advantages such as low density, high thermal conductivity, and relatively low cost, which can meet the requirements of heat sink fins for material performance and cost.

[0058] Please see Figure 3 In some embodiments, the first section 101 of the first pipeline 100 is provided with a first control valve 150, and the second pipeline is provided with a second control valve 220. The first control valve 150 is used to control the first pipeline 100 to close according to the temperature adjustment needs of the control cabinet 300, while the second control valve 220 controls the second pipeline to open, so that the carbon dioxide working fluid enters the heat exchange section 210 of the control cabinet for heat exchange; or when the control cabinet 300 is in a suitable temperature range, the first control valve 150 controls the first pipeline 100 to open, while the second control valve 220 controls the second pipeline to close, so that the carbon dioxide working fluid works in the carbon dioxide heat pump circuit.

[0059] In this embodiment, the flow direction of carbon dioxide, the working medium in the self-cooling system of the carbon dioxide heat pump control cabinet, is controlled by a first control valve 150 installed in the first section 101 of the first pipeline 100 and a second control valve 220 installed in the second pipeline.

[0060] The first control valve 150 and the second control valve 220 can alternately open and close according to a preset time interval, or they can alternately open and close according to the temperature of the control cabinet 300. For example, when the temperature of the control cabinet 300 exceeds a suitable range and cooling is required, the first control valve 150 will close the first pipeline 100. Simultaneously, the second control valve 220, working in conjunction with it, will immediately activate, opening the second pipeline. At this time, the carbon dioxide working fluid will enter the heat exchange section 210 of the control cabinet through the opened second pipeline. Due to its excellent heat exchange characteristics, the carbon dioxide working fluid efficiently exchanges heat with the inside of the control cabinet within the heat exchange section 210, thereby cooling the control cabinet and ensuring that all electronic components of the control cabinet operate stably in a suitable temperature environment.

[0061] For example, the second control valve 220 is a flow regulating valve, which can adjust the flow rate according to the actual load demand to achieve energy saving.

[0062] Conversely, when the control cabinet is within a suitable temperature range, the system's control logic changes. At this time, the first control valve 150 reacts quickly, controlling the first pipeline 100 to open. The second control valve 220 then correspondingly controls the second pipeline to close. In this state, the carbon dioxide working fluid no longer enters the heat exchange section 210 of the control cabinet, but instead continuously circulates within the carbon dioxide heat pump circuit. Within the carbon dioxide heat pump circuit, the carbon dioxide working fluid achieves efficient heat transfer and conversion through a series of thermodynamic processes, providing continuous energy support for the stable operation of the entire system, while also ensuring the rational use of energy and avoiding unnecessary energy consumption.

[0063] Through the precise coordinated control of the first control valve 150 and the second control valve 220, the entire thermal management system can flexibly adjust the flow direction and working path of the carbon dioxide working fluid according to the actual temperature requirements of the control cabinet. This not only ensures that the control cabinet is always in a suitable temperature environment, but also achieves efficient energy utilization, greatly improving the overall performance and reliability of the system.

[0064] For example, the first control valve 150 and the second control valve 220 can be manual, electrically controlled, or hydraulically controlled switching valves.

[0065] In some embodiments, a temperature sensing component is also included. When the temperature signal from the temperature sensing component is higher than a first set value, the control cabinet controls the first control valve 150 to close the first section 101 and controls the second control valve 220 to open the second pipeline. When the temperature signal from the temperature sensing component is lower than a second set value, the control cabinet controls the first control valve 150 to open the first section and controls the second control valve 220 to close the second pipeline.

[0066] To achieve more precise and efficient temperature control, the self-cooling system of the carbon dioxide heat pump control cabinet in this embodiment is also equipped with a temperature sensing component. As the "temperature sensing antenna" of the system, the temperature sensing component can capture the temperature changes of the surrounding environment or key equipment parts in real time and accurately, and convert these temperature information into temperature signals in the form of electrical signals, which are then transmitted to the control cabinet quickly and stably.

[0067] When the control cabinet receives a temperature signal from the temperature sensing component and analyzes it to determine that it exceeds a pre-set first value, it means that the current temperature has exceeded the normal range, which may adversely affect the stable operation of electronic components or the normal operation of the equipment. At this time, the control cabinet reacts quickly, sending a control command to the first control valve 150 through the control circuit and algorithm, causing the first section 101 of the carbon dioxide heat pump circuit to close, thereby blocking the flow of the working fluid in that section. Simultaneously, the control cabinet sends a command to the second control valve 220 to open the second pipeline, guiding the carbon dioxide working fluid to the heat exchange section 210 of the control cabinet to cool the control cabinet, thus achieving effective regulation of the overall temperature and ensuring that the control cabinet is maintained within a suitable temperature range.

[0068] Conversely, when the temperature signal received by the temperature sensing component from the control cabinet is lower than the second set value, it indicates that the current temperature is below the suitable temperature range required for normal operation, which may affect system performance or the normal operation of the equipment. In this case, the control cabinet will again control the first control valve 150 to open the first section 101 according to the established control strategy, allowing the carbon dioxide working fluid to circulate normally in the carbon dioxide heat pump circuit. At the same time, the control cabinet controls the second control valve 220 to close the second pipeline, preventing the carbon dioxide working fluid from flowing to the heat exchange section 210 of the control cabinet, avoiding unnecessary media diversion, and allowing the control cabinet to operate within the suitable temperature range.

[0069] For example, the first set value is 25 o C~35 o C, the second setting value is 5 o C~10 o C.

[0070] Please see Figure 4 and Figure 5 In some embodiments, a ventilation device 230 is provided around the heat exchange section 210 of the control cabinet. The ventilation device 230 is used to accelerate the heat exchange between the heat exchange section 210 of the control cabinet and the control cabinet.

[0071] The high-speed airflow generated by the ventilation equipment can quickly remove the heat accumulated in the heat exchange section 210 of the control cabinet, while simultaneously introducing relatively cool air into the control cabinet. This continuous air circulation greatly accelerates the heat exchange process between the heat exchange section 210 and the control cabinet, ensuring that the control cabinet is always in a suitable temperature environment, thereby guaranteeing the stable operation and efficient functioning of the internal electrical components. For example, the ventilation equipment is a fan.

[0072] Ventilation equipment 230 is disposed around the heat exchange section 210 of the control cabinet. On the one hand, the heat exchange section 210 can absorb heat from the control cabinet through heat exchange. On the other hand, the air blown out by the ventilation equipment 230 flows along the gaps in the heat dissipation fins 212, accelerating air circulation and enhancing heat dissipation. At the same time, the heat exchange section 210 can also absorb heat from the outside air, enabling it to expand the area of ​​the evaporator and improve the system's energy efficiency ratio. In some embodiments, the heat exchange section 210 is connected to the control cabinet 300 via a retractable connecting device. The retractable connecting device allows the position of the heat exchange section 210 relative to the control cabinet 300 to adapt to different installation spaces and heat dissipation requirements.

[0073] The retractable connection device allows the heat exchange section 210 of the control cabinet to be flexibly adjusted in position, so that it can find the best installation position in narrow equipment rooms or complex industrial sites, which greatly improves the applicability of the control cabinet in various spaces and reduces installation difficulties caused by space limitations.

[0074] Furthermore, based on the actual heat generation and heat dissipation requirements of the control cabinet 300, the position of the heat exchange section can be adjusted via a retractable connection device to achieve precise heat dissipation. For example, when certain areas generate a lot of heat, the heat exchange section can be moved closer to those areas to enhance the heat dissipation effect, ensuring that the electronic components inside the control cabinet are always at a suitable operating temperature and extending the service life of the equipment.

[0075] In some embodiments, the heat exchange section 210 of the control cabinet is provided with a protrusion structure or a groove structure corresponding to the control cabinet 300. The heat exchange section 210 of the control cabinet is embedded in the protrusion or docked with the control cabinet 300 through the groove, so as to fit tightly against the outer surface of the control cabinet 300 to achieve efficient heat exchange.

[0076] In this embodiment, a raised structure or a recessed structure corresponding to the control cabinet is provided on the heat exchange section 210 of the control cabinet. This unique structural design provides a strong guarantee for achieving efficient heat exchange. When a raised structure is used on the heat exchange section 210, the raised portion of the heat exchange section 210 can be precisely embedded into the corresponding recessed position of the control cabinet 300. This embedding method makes the connection between the heat exchange section and the control cabinet seamless, greatly reducing the thermal resistance between the two. The reduction in thermal resistance means that heat can be transferred from the control cabinet to the heat exchange section more quickly and smoothly, thereby achieving efficient heat exchange.

[0077] When the heat exchange section 210 of the control cabinet adopts a groove structure, the heat exchange section 210 connects with the protruding structure on the control cabinet 300 through the groove. The corresponding protruding structure of the control cabinet 300 is embedded in the groove of the heat exchange section, achieving a tight fit. This tight fit not only ensures efficient heat transfer but also enhances the stability of the overall structure to a certain extent.

[0078] Through this protruding embedding or groove mating method, the heat exchange section 210 of the control cabinet is tightly fitted to the outer surface of the control cabinet 300. Compared with traditional heat exchange methods, this design greatly increases the heat exchange area, enabling the transfer of more heat per unit time. This efficient heat exchange performance effectively reduces the internal temperature of the control cabinet 300, ensuring that electronic components operate in a suitable temperature environment, thereby improving the reliability and stability of the equipment and extending its service life. At the same time, this structural design is relatively simple, easy to manufacture and install, and has high practicality and economy, providing a feasible solution to the heat dissipation problem of industrial control cabinets.

[0079] In some embodiments, the heat exchange section 210 of the control cabinet is provided with a slot structure or a snap-fit ​​structure that cooperates with the control cabinet 300. The heat exchange section 210 of the control cabinet is connected to the control cabinet 300 through the slot structure or the snap-fit ​​structure so that the heat exchange section 210 of the control cabinet is securely connected to the control cabinet.

[0080] The heat exchange section 210 of the control cabinet is connected to the control cabinet 300 via a slot structure or a snap-fit ​​structure. Both structures ensure a secure connection between the heat exchange section 210 and the control cabinet 300. This secure connection not only ensures the stability of the heat exchange section 210 during operation but also guarantees the proper functioning of its efficient heat exchange capabilities, further improving the overall reliability and service life of the control cabinet 300.

[0081] In some embodiments, the heat exchange section 210 of the control cabinet is configured as a rotary reciprocating structure attached to the outer wall of the control cabinet.

[0082] The rotary reciprocating structure significantly increases the contact area between the heat exchange section 210 and the control cabinet within a limited space, allowing for more efficient heat transfer, improved heat exchange efficiency, and more effectively reduced temperature inside the control cabinet 300. This structure can be tightly attached to the outer wall of the control cabinet 300 without occupying excessive additional space, making it particularly suitable for space-constrained applications. The rotary reciprocating heat exchange section cleverly utilizes the space on the outer wall of the control cabinet, achieving efficient heat dissipation without making the overall layout appear bulky.

[0083] Please see Figure 6 In some embodiments, the top of the control cabinet is provided with at least one ventilation hole 301, and the heat exchange part 210 of the control cabinet is disposed on the top of the control cabinet and is disposed opposite to the ventilation hole 301.

[0084] To improve heat dissipation in the control cabinet, at least one ventilation hole 301 is provided on the top of the cabinet, playing a crucial role in the heat dissipation process. When the electronic components inside the control cabinet generate heat, the hot air naturally rises. The heat exchange section 210 installed on the top of the control cabinet uses its own heat exchange principle to cool the rising hot air. The air cooled by the heat exchange section 210 naturally sinks due to its increased density. This cycle of hot air rising and cold air sinking creates air convection within the control cabinet.

[0085] The formation of air convection greatly accelerates heat dissipation. Compared with traditional heat dissipation methods, this natural convection cooling not only eliminates the need for additional power equipment such as fans, reducing equipment costs and energy consumption, but also avoids heat dissipation failures caused by fan malfunctions, thus improving the reliability of the cooling system. At the same time, natural convection allows for uniform heat exchange within the control cabinet, preventing localized overheating and further ensuring the stable operation of electrical equipment.

[0086] The number of ventilation holes 301 is not specifically limited in this embodiment. The number of ventilation holes 301 can be one or more.

[0087] The shape of the ventilation hole 301 is not specifically limited in the embodiments of this application. It can be circular, square or other regular or irregular shapes. The shapes of multiple ventilation holes 301 can be the same or different.

[0088] The aperture size of the ventilation hole 301 is not specifically limited in this embodiment. It can be set as needed. For example, the aperture of the ventilation hole 301 corresponding to the core device can be larger than the aperture of other ventilation holes 301.

[0089] The heat exchange section 210 of the control cabinet may also be located on the side wall of the control cabinet 300, but this application is not limited thereto.

[0090] In some embodiments, the control cabinet contains a humidity sensing component and a dehumidification device. When the humidity signal from the humidity sensing component is higher than a set value, the control cabinet controls the dehumidification device to perform dehumidification.

[0091] The humidity sensing component monitors humidity changes inside the control cabinet in real time. When the humidity signal detected by the component exceeds a preset value, it immediately transmits this signal to the control cabinet. For example, the humidity sensing component utilizes a special sensing material that is extremely sensitive to water molecules in the air. Through interaction with water molecules, it generates changes in electrical signals, thus converting humidity information into an electrical signal that can be recognized by the control cabinet. The intelligent control system inside the control cabinet quickly analyzes and processes this signal. Once it confirms that the humidity exceeds the set range, it rapidly issues a control command to activate the dehumidification device. The dehumidification device is the actuator that ensures a dry environment inside the control cabinet. Upon receiving the activation command from the control cabinet, the dehumidification device quickly begins operation, efficiently reducing the humidity inside the control cabinet.

[0092] For example, the humidity setting is 30%-50% RH.

[0093] In actual operation, the humidity control system can effectively cope with various complex environmental conditions, ensuring that the electronic equipment in the control cabinet is always in a suitable humidity environment, which greatly improves the operational stability and reliability of the equipment, reduces equipment failures and damage caused by humidity problems, and provides a solid guarantee for the continuous and efficient operation of the equipment.

[0094] Please see Figures 1 to 3 In some embodiments, the carbon dioxide heat pump control cabinet self-cooling system further includes a heat recovery device 160, which exchanges heat with the first section 101 and the second section 102 respectively.

[0095] The regenerative device 160 is a device capable of heat exchange. It utilizes the temperature difference between the low-temperature and high-temperature carbon dioxide working fluids in the circuit to transfer heat from the high-temperature carbon dioxide working fluid to the low-temperature carbon dioxide working fluid, thereby improving the energy efficiency of the entire system.

[0096] For example, the regenerating device 160 is disposed between the evaporating device 140 and the compressing device 110 in the first section 101, and between the cooling device 120 and the throttling device 130 in the second section 102.

[0097] In the self-cooling system of the carbon dioxide heat pump control cabinet, the first section 101 and the second section 102 have different temperature states and fluid characteristics. When the regenerator 160 exchanges heat with the second section 102, the relatively high-temperature carbon dioxide fluid in the second section 102 flows into the regenerator 160 carrying heat. The special structure inside the regenerator 160, such as efficient heat exchange fins or pipes with good thermal conductivity, allows for rapid and sufficient heat transfer. This heat is transferred to the low-temperature fluid in the first section 101, which flows in the opposite direction to the fluid in the first section 101 within the regenerator 160. After absorbing heat, the temperature of the low-temperature fluid in the first section 101 rises, thereby changing its physical properties and laying the foundation for subsequent recycling in the system. The heat exchange process between the regenerator 160 and the first section 101 is also based on the principle of heat transfer from a high-temperature region to a low-temperature region. As the low-temperature fluid in the first section 101 flows through the regenerator 160, it continuously absorbs the heat transferred from the high-temperature fluid in the second section 102. As heat exchange continues, the temperature of the first section of fluid 101 gradually rises until it reaches a temperature that meets the specific requirements of the system.

[0098] The heat recovery device 160 exchanges heat with the first section 101 and the second section 102, greatly improving the performance of the self-cooling system of the carbon dioxide heat pump control cabinet. On the one hand, by recovering and utilizing heat, additional energy consumption is reduced, and operating costs are lowered; on the other hand, the temperature distribution of the fluid within the system is optimized, making the operation of the entire self-cooling system more stable and reliable.

[0099] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A self-cooling system for a carbon dioxide heat pump control cabinet, characterized in that, include: A carbon dioxide heat pump circuit includes a compression device, a cooling device, a throttling device, and an evaporation device interconnected by a first pipeline. The compression device has a first inlet and a first outlet, and the evaporation device includes a second inlet and a second outlet. The carbon dioxide heat pump circuit also includes a first section located between the second outlet and the first inlet and a second section located between the first outlet and the second inlet. The cooling circuit includes a control cabinet heat exchange section and a second pipeline. The control cabinet heat exchange section is connected between the second outlet and the first inlet through the second pipeline and is connected in parallel with the first section. The control cabinet heat exchange section is used to contact the control cabinet for heat exchange.

2. The self-cooling system for the carbon dioxide heat pump control cabinet according to claim 1, characterized in that, It also includes a control cabinet, which is communicatively connected to the carbon dioxide heat pump circuit and the cooling circuit to control the operation of the carbon dioxide heat pump circuit and the cooling circuit.

3. The self-cooling system for the carbon dioxide heat pump control cabinet according to claim 1 or 2, characterized in that, The heat exchange section of the control cabinet includes heat exchange pipes and multiple spaced heat dissipation fins. The heat exchange pipes are connected to the second pipe. The heat exchange pipes are spaced along the extension direction of the heat dissipation fins, and the two ends of the heat dissipation fins in their own extension direction are attached to the outer shell of the control cabinet. Optionally, ventilation equipment is provided around the heat exchange section of the control cabinet to accelerate heat exchange between the heat exchange section of the control cabinet and the control cabinet.

4. The self-cooling system for the carbon dioxide heat pump control cabinet according to claim 1 or 2, characterized in that, The first section of the first pipeline is equipped with a first control valve, and the second pipeline is equipped with a second control valve. The first control valve is used to control the first pipeline to close according to the temperature adjustment needs of the control cabinet, while the second control valve controls the second pipeline to open so that the carbon dioxide working fluid can enter the heat exchange section of the control cabinet for heat exchange. Alternatively, when the control cabinet is in a suitable temperature range, the first control valve controls the first pipeline to open, while the second control valve controls the second pipeline to close, so that the carbon dioxide working fluid works in the carbon dioxide heat pump circuit.

5. The self-cooling system for the carbon dioxide heat pump control cabinet according to claim 4, characterized in that, It also includes a temperature sensing component. When the temperature signal from the temperature sensing component is higher than a first set value, the control cabinet controls the first control valve to close the first section and controls the second control valve to open the second pipeline. When the temperature signal from the temperature sensing component is lower than a second set value, the control cabinet controls the first control valve to open the first section and controls the second control valve to close the second pipeline.

6. The self-cooling system for a carbon dioxide heat pump control cabinet according to claim 1 or 2, characterized in that, The heat exchange section of the control cabinet is connected to the control cabinet via a retractable connecting device. The retractable connecting device allows the heat exchange section of the control cabinet to be adjusted relative to the control cabinet to adapt to different installation spaces and heat dissipation requirements.

7. The self-cooling system for a carbon dioxide heat pump control cabinet according to claim 1 or 2, characterized in that, The heat exchange section of the control cabinet is provided with a protruding structure or a groove structure corresponding to the control cabinet. The heat exchange section of the control cabinet is embedded in the protrusion or docked with the control cabinet through the groove, so as to fit tightly against the outer surface of the control cabinet and achieve efficient heat exchange.

8. The self-cooling system for the carbon dioxide heat pump control cabinet according to claim 2, characterized in that, The control cabinet has at least one ventilation hole on its top, and the heat exchange section of the control cabinet is located on the top of the control cabinet and is positioned opposite to the ventilation hole.

9. The self-cooling system for a carbon dioxide heat pump control cabinet according to claim 1 or 2, characterized in that, The control cabinet contains a humidity sensing component and a dehumidification device. When the humidity signal from the humidity sensing component is higher than a set value, the control cabinet controls the dehumidification device to perform dehumidification.

10. The self-cooling system for a carbon dioxide heat pump control cabinet according to claim 1 or 2, characterized in that, It also includes a heat recovery device, which exchanges heat with the first section and the second section respectively.

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