Self-cooling system of carbon dioxide heat pump control cabinet

Abstract

The invention 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] The present application belongs to the technical field of electrical equipment cooling, and in particular, relates to a self-cooling system for a carbon dioxide heat pump control cabinet. Background Art

[0002] Control cabinets play a vital role in industrial production and automation control. Various electrical components are installed inside, such as controllers, relays, contactors, inverters, etc. These electrical components will generate a lot of heat during operation. If the heat cannot be dissipated in time and effectively, the temperature inside the control cabinet will rise, affecting the performance and life of the electrical equipment, and may even cause failures and safety accidents.

[0003] Carbon dioxide heat pump units are usually placed outdoors. Traditional control cabinet cooling methods mainly include natural ventilation, forced ventilation, etc. These methods have problems such as limited cooling effect and high energy consumption, especially in summer when the cooling effect is worse. Summary of the invention

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

[0005] An embodiment of the present application provides a carbon dioxide heat pump control cabinet self-cooling system, including: 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 has a first inlet and a first outlet, 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; a cooling circuit, including a control cabinet heat exchange part and a second pipeline, the control cabinet heat exchange part is connected between the second outlet and the first inlet through the second pipeline and is connected in parallel with the first section, and the control cabinet heat exchange part is used to contact the control cabinet for heat exchange.

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

[0007] According to an embodiment of the present application, the heat exchange part of the control cabinet includes a heat exchange pipeline and a plurality of spaced heat sinks, the heat exchange pipeline is connected to the second pipeline, the heat exchange pipeline is spaced along the extension direction of the heat sinks, and the two ends of the heat sinks in their own extension direction are in contact with the outer shell of the control cabinet; optionally, ventilation equipment is provided on the surrounding side of the heat exchange part of the control cabinet, and the ventilation equipment is used to accelerate the heat exchange between the heat exchange part of the control cabinet and the control cabinet.

[0008] According to an embodiment of the present application, a first section of the first pipeline is provided with a first control valve, and a second pipeline is provided with a second control valve. The first control valve is used to control the closure of the first pipeline according to the temperature adjustment needs of the control cabinet, and at the same time, the second control valve controls the conduction of the second pipeline to allow the carbon dioxide working medium to enter the heat exchange part of the control cabinet for heat exchange; or when the control cabinet is in a suitable temperature range, the first control valve controls the conduction of the first pipeline, and at the same time, the second control valve controls the closure of the second pipeline to allow the carbon dioxide working medium to work in the carbon dioxide heat pump circuit.

[0009] According to an embodiment of the present application, a temperature sensing component is also included. When the temperature signal of the temperature sensing component is higher than a first set value, the control cabinet controls the first control valve to close the first pipeline and controls the second control valve to open the second pipeline. When the temperature signal of the temperature sensing component is lower than a second set value, the control cabinet controls the first control valve to open the first pipeline and controls the second control valve to close the second pipeline.

[0010] According to an embodiment of the present application, the heat exchange part of the control cabinet is connected to the control cabinet via a retractable connection device, and the retractable connection device allows the heat exchange part 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 the present application, a protrusion structure or a groove structure corresponding to the control cabinet is provided on the heat exchange part of the control cabinet. The heat exchange part of the control cabinet is embedded with the protrusion or docked with the control cabinet through the groove, so as to fit tightly on the outer surface of the control cabinet to achieve efficient heat exchange.

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

[0013] According to an embodiment of the present application, a humidity sensor component and a dehumidification device are provided in the control cabinet. When the humidity signal of the humidity sensor component is higher than a set value, the control cabinet controls the dehumidification device to perform a dehumidification operation.

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

[0015] The self-cooling system of the carbon dioxide heat pump control cabinet in the embodiment of the present application makes full use of the cooling medium in the carbon dioxide heat pump circuit, without the need for additional cooling equipment and energy consumption. Through clever pipeline design and parallel connection, effective heat recovery and reuse are achieved, improving the energy efficiency of the entire system. Compared with traditional control cabinet cooling methods, such as air cooling or water cooling systems, this self-cooling system can significantly reduce energy consumption and save operating costs.

[0016] Since the system directly uses the medium in the carbon dioxide heat pump circuit for heat exchange, it reduces the complex external cooling equipment and connecting pipes, and reduces the risk of system failure. At the same time, the control cabinet heat exchange unit cools the control cabinet by heat exchange, ensuring that the electronic components in the control cabinet always work within the appropriate temperature range, improving the reliability and stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

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

[0019] Figure 2 A structural schematic diagram of another carbon dioxide heat pump control cabinet self-cooling system provided in an embodiment of the present application;

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

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

[0022] Figure 5 A schematic diagram of the structure of a heat exchange unit of a control cabinet provided in some embodiments of the present application;

[0023] Figure 6 A schematic diagram of the structure of a control cabinet provided in some embodiments of the present application.

[0024] Description of reference numerals:

[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;

[0028] 142, second outlet; 150, first control valve; 160, heat recovery device;

[0029] 200, second pipeline; 210, heat exchange part of control cabinet; 211, heat exchange pipeline; 212, heat dissipation fin; 220, second control valve; 230, ventilation equipment; 300, control cabinet. DETAILED DESCRIPTION

[0030] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0032] The heat pump system is an efficient energy conversion and utilization system. Based on the principle of thermodynamics, the heat pump system transfers heat energy from low-level heat sources to high-level heat sources by consuming high-level energy such as electrical energy. Specifically, the working medium in the heat pump unit absorbs heat energy from the low-temperature heat source in the evaporator, and after the compressor increases the temperature and pressure, it releases heat energy in the condenser, thereby realizing the transfer of heat energy.

[0033] In modern industrial and commercial applications, carbon dioxide heat pump technology has gradually attracted widespread attention due to its high efficiency and environmental protection. A carbon dioxide heat pump system is a heat pump system that uses carbon dioxide as a working medium. The working principle of a carbon dioxide heat pump system is similar to that of other heat pump systems. It transfers the heat absorbed by low-temperature heat sources such as groundwater and underground heat energy to high-temperature heat sources such as heating and hot water through a cyclic compression refrigeration process. The carbon dioxide heat pump system has high thermal efficiency and can make full use of the heat energy in low-temperature heat sources and convert it into high-temperature heat energy, thereby achieving high efficiency and energy saving. As a natural refrigerant, carbon dioxide has almost zero damage to the ozone layer and has a low global warming potential, which meets environmental protection requirements. As a natural refrigerant, carbon dioxide has zero ozone depletion potential (ODP) and a low global warming potential (GWP), which is environmentally friendly. Using carbon dioxide as a cooling medium meets the requirements of current environmental protection policies, helps reduce greenhouse gas emissions, and protects the ecological environment.

[0034] However, during the operation of the CO2 heat pump, the control cabinet is the core control component, and its stable operation is crucial to the performance of the entire system. Excessive temperature will affect the life and performance of the electronic components in the control cabinet, and may even cause system failure. Therefore, it is of great practical significance to develop an efficient self-cooling system for the CO2 heat pump control cabinet.

[0035] In view of this, the present 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 in the control cabinet, and improve the operating reliability and life of the electrical equipment.

[0036] See also Figure 1 and Figure 2 The embodiment of the present application provides a carbon dioxide heat pump control cabinet self-cooling system, including: a carbon dioxide heat pump circuit and a cooling circuit, wherein 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 part 210 and a second pipeline, the control cabinet heat exchange part 210 is connected between the second outlet and the first inlet 111 through the second pipeline and is connected in parallel with the first section 101, and the control cabinet heat exchange part 210 is used to contact the control cabinet for heat exchange.

[0037] In the embodiment of the present application, the carbon dioxide heat pump circuit is the basis of the entire system, which is mainly composed 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 a first pipeline 100 to form a complete circulation loop.

[0038] The function of the compression device 110 is to compress the carbon dioxide gas to increase its pressure and temperature. The compression device 110 has a first inlet 111 and a first outlet 112. The low-temperature, low-pressure gaseous carbon dioxide working medium enters the compression device 110 from the first inlet 111. Under the action of the compression device 110, the carbon dioxide gas is compressed, the distance between molecules is reduced, the molecular motion is intensified, and the carbon dioxide is converted into a high-temperature, high-pressure gas, preparing for the subsequent heat release process in the condensing device. For example, a common compressor adopts a piston or screw structure, and compresses the low-temperature, low-pressure carbon dioxide gas into a high-temperature, high-pressure gas through mechanical movement. 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.

[0039] High-temperature and high-pressure carbon dioxide gas enters the cooling device 120, and the carbon dioxide heats the heated medium (such as air or water) to a preset temperature zone in the cooling device 120, while the carbon dioxide itself is cooled. In this process, the high-temperature and high-pressure carbon dioxide gas transfers heat through heat exchange with the heated medium (such as air or water), and its own temperature is reduced. The carbon dioxide in the cooling device 120 mainly undergoes an isobaric heat release process, and the pressure is basically maintained at the high-pressure state of the first outlet 112. There may also be a certain degree of slight pressure loss. The carbon dioxide gas is gradually cooled in the cooling device 120, and the medium-temperature and high-pressure carbon dioxide is output through the outlet end of the cooling device. The structural design of the cooling device 120 is diverse. For example, a shell and tube heat exchanger is used, in which carbon dioxide flows in the tube and the cooling medium flows in the reverse direction in the shell to achieve efficient heat exchange. The medium temperature in this application refers to the temperature state after heat exchange and cooling relative to the high-temperature state after compression by the compression device.

[0040] The gradually cooled carbon dioxide gas may still 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 embodiment of the present application is a condensing device.

[0041] The throttling device 130 is installed between the cooling device 120 and the evaporation device 140. Its function is to make the pressure of the cooled medium-temperature and high-pressure carbon dioxide suddenly drop due to the throttling effect when passing through the throttling device 130, thereby causing part of the carbon dioxide liquid to vaporize rapidly, and the temperature to further drop to a low-temperature state. After passing through the throttling device 130, the carbon dioxide working medium becomes a low-temperature, low-pressure liquid or a gas-liquid two-phase mixture. There are many types of throttling devices 130, such as capillary tubes, expansion valves, etc., which can be selected according to the specific needs and working conditions of the system.

[0042] In the evaporation device 140, the low-temperature and low-pressure carbon dioxide liquid absorbs heat from the surrounding environment, vaporizes, and turns back into low-temperature and low-pressure gas, and then returns to the first inlet 111 of the compression device 110, completing a cycle. The evaporation device 140 can use a fin-tube heat exchanger to increase the evaporation efficiency by increasing the heat exchange area.

[0043] Therefore, when the carbon dioxide heat pump circuit is started, the compression device 110 compresses the low-temperature and low-pressure carbon dioxide gas sucked from the evaporation device 140 to make it into a high-temperature and high-pressure gas, which is discharged through the first outlet 112. The high-temperature and high-pressure carbon dioxide gas enters the cooling device 120 along the first pipeline 100, exchanges heat with the heated medium in the cooling device 120, and flows out of the cooling device in a medium-temperature and high-pressure state after being cooled. In the embodiment of the present application, the carbon dioxide flowing out of the cooling device can be a supercritical state, or a liquid state or a gas-liquid coexistence state. Then, the cooled carbon dioxide is reduced in pressure and temperature through the throttling device 130, and then enters the evaporation device 140. In the evaporation device 140, the carbon dioxide absorbs heat from the surrounding environment, evaporates into a low-temperature and low-pressure gas, and then returns to the first inlet 111 of the compression device 110 through the first pipeline 100, and so on. The cycle is repeated to achieve continuous heat transfer and the working cycle of the heat pump.

[0044] In the embodiment of the present application, the cooling circuit is a key part to realize the self-cooling of the control cabinet. The cooling circuit includes the control cabinet heat exchange part 210 and the second pipeline. The number of cooling circuits can be one or more.

[0045] There may be one or more control cabinet heat exchange parts 210 in each cooling circuit, and multiple control cabinet heat exchange parts 210 may be connected in parallel in the second pipeline or in series in the second pipeline.

[0046] The control cabinet heat exchange part 210 is used to contact the control cabinet and realize efficient heat exchange. The control cabinet heat exchange part 210 is connected between the second outlet and the first inlet 111 through the second pipeline, and is connected in parallel with the first section 101. This connection mode allows part of the carbon dioxide output from the second outlet of the evaporation device 140 to enter the control cabinet heat exchange part 210. In the control cabinet heat exchange part 210, the carbon dioxide absorbs the heat of the control cabinet and its temperature rises, and then flows back to the first inlet 111 of the compression device 110 to enter the next cycle.

[0047] 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 part of the carbon dioxide returns directly to the compression device 110 along the first section 101 pipeline, while the other part enters the control cabinet heat exchange part 210 through the second pipeline. In the control cabinet heat exchange part 210, there is a temperature difference between the carbon dioxide and the control cabinet, and the heat is transferred from the control cabinet to the carbon dioxide. As the carbon dioxide absorbs heat, its temperature gradually increases, and then it flows back to the compression device 110 with the absorbed heat. In the compression device 110, this part of the heated carbon dioxide is mixed with the low-temperature carbon dioxide from the evaporation device 140, compressed and heated again, and enters the next cycle. In this way, the cooling circuit continuously transfers the heat of the control cabinet to realize the self-cooling function of the control cabinet.

[0048] The self-cooling system of the carbon dioxide heat pump control cabinet in the embodiment of the present application makes full use of the cooling medium in the carbon dioxide heat pump circuit, without the need for additional cooling equipment and energy consumption. Through clever pipeline design and parallel connection, effective heat recovery and reuse are achieved, improving the energy efficiency of the entire system. Compared with traditional control cabinet cooling methods, such as air cooling or water cooling systems, this self-cooling system can significantly reduce energy consumption and save operating costs.

[0049] Since the system directly uses the medium in the carbon dioxide heat pump circuit for heat exchange, it reduces the complex external cooling equipment and connecting pipes, and reduces the risk of system failure. At the same time, the control cabinet heat exchange unit 210 performs heat exchange and cooling on the control cabinet to ensure that the electronic components in the control cabinet always work within a suitable temperature range, thereby improving the reliability and stability of the system.

[0050] In some embodiments, the carbon dioxide heat pump control cabinet self-cooling system of the present application may not include a control cabinet, and the control cabinet may be obtained separately, for example, through commercial purchase, and the control cabinet is connected to the carbon dioxide heat pump control cabinet self-cooling system in the present application through an interface.

[0051] In order to have good compatibility with the CO2 heat pump control cabinet self-cooling system and work better together, in some embodiments, please refer to Figure 2 and Figure 3The carbon dioxide heat pump control cabinet self-cooling system of the present application also includes a control cabinet 300, which is respectively communicated with 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.

[0052] The CO2 heat pump control cabinet self-cooling system is an efficient and intelligent temperature control system, in which the control cabinet 300 plays a core hub role. As the control center of the entire system, the control cabinet 300 establishes communication connections with the CO2 heat pump circuit and the cooling circuit respectively. Exemplarily, the communication connection is based on advanced communication protocols and intelligent control technology, and is connected via a communication cable. Through the communication cable, the control cabinet 300 can receive real-time data feedback from various sensor components in the CO2 heat pump circuit and the cooling circuit, such as real-time operating parameters transmitted by temperature sensors, pressure sensors, etc.

[0053] See also Figure 5 In some embodiments, the heat exchange part 210 of the control cabinet includes a heat exchange pipeline 211 and a plurality of heat dissipation fins 212 arranged at intervals. The heat exchange pipeline 211 is connected to the second pipeline 200. The heat exchange pipeline 211 is arranged at intervals 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.

[0054] The heat exchange part 210 of the control cabinet is composed of a heat exchange pipeline 211 and a plurality of heat dissipation fins 212 arranged at intervals. The heat exchange pipeline 211 is connected to the second pipeline 200, and the second pipeline 200 transmits low-temperature and low-pressure carbon dioxide working medium. The connection between the heat exchange pipeline 211 and the second pipeline 200 allows the cooling medium to flow smoothly into the heat exchange pipeline 211 for the subsequent heat exchange process.

[0055] The heat dissipation fins 212 are arranged at intervals, which can quickly transfer the heat generated inside the control cabinet 300. The heat exchange pipelines 211 are arranged at intervals between the heat dissipation fins 212, so that the cooling medium can fully exchange heat with the heat dissipation fins 212 during the flow process. When heat is generated inside the control cabinet 300 due to the operation of electrical components, the heat will be transferred to the heat dissipation fins 212 in contact with them. Since the heat dissipation fins 212 have a large surface area, they can quickly dissipate heat to the surrounding environment. At the same time, the cooling medium flowing through the heat exchange pipelines 211 continuously absorbs the heat transferred from the heat dissipation fins 212, further enhancing the heat dissipation effect.

[0056] The two ends of the heat dissipation fins 212 in their extension direction are in contact with the outer shell of the control cabinet 300. On the one hand, it can ensure that the heat dissipation fins 212 are closely connected to the heat source inside the control cabinet 300, reduce the thermal resistance in the heat transfer process, and improve the heat transfer efficiency. On the other hand, by being in contact with the outer shell, the heat dissipation fins 212 can directly transfer the absorbed heat to the outer shell of the control cabinet 300, and use the larger surface area of ​​the outer shell for natural heat dissipation, further enhancing the heat dissipation capacity of the entire control cabinet.

[0057] In the embodiment of the present application, the control cabinet heat exchange part 210 composed of the heat exchange pipeline 211 and a plurality of 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 additional independent space for the control cabinet heat exchange part 210. The heat exchange function is combined with the outer wall structure, making the overall structure of the control cabinet more compact and improving space utilization.

[0058] Exemplarily, the heat sink fins 212 are made of metal materials with good thermal conductivity, such as aluminum alloy, etc. Aluminum alloy has the advantages of low density, high thermal conductivity, and relatively low cost, and can meet the requirements of heat sink fins for material performance and cost.

[0059] See also 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 be closed according to the temperature adjustment needs of the control cabinet 300, and the second control valve 220 controls the second pipeline to be connected, so that the carbon dioxide working medium enters the heat exchange part 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 be connected, and the second control valve 220 controls the second pipeline to be closed, so that the carbon dioxide working medium works in the carbon dioxide heat pump circuit.

[0060] In the embodiment of the present application, the flow direction of the working medium carbon dioxide in the self-cooling system of the carbon dioxide heat pump control cabinet is controlled by the first control valve 150 arranged in the first section 101 of the first pipeline 100 and the second control valve 220 arranged in the second pipeline.

[0061] The first control valve 150 and the second control valve 220 can be opened and closed alternately at preset time intervals, or can be opened and closed alternately according to the temperature of the control cabinet 300. For example, when the temperature of the control cabinet 300 exceeds the appropriate range and needs to be cooled, the first control valve 150 will play a role in controlling the first pipeline 100 to close. At the same time, the second control valve 220 working in conjunction with it is immediately started to control the conduction of the second pipeline. At this time, the carbon dioxide working medium will follow the conductive second pipeline and enter the heat exchange part 210 of the control cabinet. With its excellent heat exchange characteristics, the carbon dioxide working medium can efficiently exchange heat with the inside of the control cabinet in the heat exchange part 210 of the control cabinet, thereby cooling the control cabinet and ensuring that the various electronic components of the control cabinet operate stably under a suitable temperature environment.

[0062] Exemplarily, the second control valve 220 is a flow regulating valve, which can adjust the flow according to actual load demand to achieve energy saving.

[0063] On the contrary, when the control cabinet is in a suitable temperature range, the control logic of the system will change. At this time, the first control valve 150 responds quickly to control the conduction of the first pipeline 100. The second control valve 220 controls the second pipeline to close accordingly. In this state, the carbon dioxide working medium no longer enters the heat exchange part 210 of the control cabinet, but continues to circulate in the carbon dioxide heat pump loop. In the carbon dioxide heat pump loop, the carbon dioxide working medium realizes efficient transfer and conversion of heat 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.

[0064] 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, which not only ensures that the control cabinet is always in a suitable temperature environment, but also realizes efficient use of energy, greatly improving the overall performance and reliability of the system.

[0065] For example, the first control valve 150 and the second control valve 220 may be manual, electrically controlled, or hydraulically controlled on-off valves.

[0066] In some embodiments, a temperature sensing component is also included. When the temperature signal of 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 of the temperature sensing component is lower than a second set value, the control cabinet controls the first control valve 150 to open the first pipeline and controls the second control valve 220 to close the second pipeline.

[0067] In order to achieve more accurate and efficient temperature control, the carbon dioxide heat pump control cabinet self-cooling system in the embodiment of the present application is also equipped with a temperature sensor component. The temperature sensor component serves as the "temperature sensing antenna" of the system, which 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 quickly and stably transmitted to the control cabinet.

[0068] When the control cabinet receives the temperature signal fed back by the temperature sensor component and determines that it is higher than the pre-set first set value after analysis, it means that the current temperature has exceeded the normal range and may have an adverse effect on the stable operation of electronic components or the normal operation of the equipment. At this time, the control cabinet responds quickly and sends a control instruction to the first control valve 150 through the control circuit and algorithm, so that the first section 101 of the carbon dioxide heat pump circuit is closed, thereby blocking the flow of this part of the working fluid. At the same time, the control cabinet issues an instruction to the second control valve 220 to open the second pipeline and guide the carbon dioxide working fluid to flow to the control cabinet heat exchange part 210 to cool the control cabinet, so as to achieve effective regulation of the overall temperature and ensure that the control cabinet is maintained in a suitable temperature range.

[0069] On the contrary, when the temperature signal of the temperature sensor component received by the control cabinet is lower than the second set value, it indicates that the current temperature is lower than the appropriate temperature range required for normal operation, which may affect the system performance or the normal operation of the equipment. In this case, the control cabinet will again control the first control valve 150 to conduct the first section 101 according to the established control strategy, so that the carbon dioxide working medium can 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 medium from flowing to the control cabinet heat exchange part 210, avoiding unnecessary medium diversion, and allowing the control cabinet to operate in a suitable temperature range.

[0070] Exemplarily, the first setting value is 25°C to 35°C, and the second setting value is 5°C to 10°C.

[0071] See also Figure 4 and Figure 5 In some embodiments, a ventilation device 230 is provided around the control cabinet heat exchange part 210 , and the ventilation device 230 is used to accelerate the heat exchange between the control cabinet heat exchange part 210 and the control cabinet.

[0072] The high-speed airflow generated by the ventilation device can quickly take away the heat accumulated in the control cabinet heat exchange part 210, and introduce relatively low-temperature air into the control cabinet. Through this continuous air circulation, the heat exchange process between the control cabinet heat exchange part 210 and the control cabinet is greatly accelerated, ensuring that the control cabinet is always in a suitable temperature environment, thereby ensuring the stable operation and efficient work of the internal electrical components. Exemplarily, the ventilation device is a fan.

[0073] The ventilation device 230 is arranged on the peripheral side of the control cabinet heat exchange part 210. On the one hand, the control cabinet heat exchange part 210 can absorb the heat in the control cabinet through heat exchange. On the other hand, the wind blown out by the ventilation device 230 flows along the gaps between the heat dissipation fins 212 to accelerate air circulation. While strengthening heat dissipation, the control cabinet heat exchange part 210 can also absorb heat from the external air, so that the control cabinet heat exchange part 210 plays the role of expanding the area of ​​the evaporation device and improving the system energy efficiency ratio. In some embodiments, the control cabinet heat exchange part 210 is connected to the control cabinet 300 through a retractable connection device, and the retractable connection device allows the control cabinet heat exchange part 210 to be adjusted relative to the control cabinet 300 to adapt to different installation spaces and heat dissipation requirements.

[0074] The retractable connection device enables the heat exchange part 210 of the control cabinet to be flexibly adjusted in position, so that the best installation position can be found in both narrow equipment rooms and industrial sites with complex layouts, which greatly improves the applicability of the control cabinet in various spaces and reduces installation difficulties caused by space limitations.

[0075] And according to the actual heating situation and heat dissipation requirements of the control cabinet 300, the position of the heat exchange part is adjusted through the retractable connection device to achieve precise heat dissipation. For example, when a certain area generates a lot of heat, the heat exchange part can be moved closer to the area to enhance the heat dissipation effect, ensure that the electronic components in the control cabinet are always at a suitable working temperature, and extend the service life of the equipment.

[0076] In some embodiments, a protrusion structure or a groove structure corresponding to the control cabinet 300 is provided on the control cabinet heat exchange part 210. The control cabinet heat exchange part 210 is embedded with the protrusion or docked with the control cabinet 300 through the groove, so as to fit tightly on the outer surface of the control cabinet 300 to achieve efficient heat exchange.

[0077] In the embodiment of the present application, a raised structure or a groove structure corresponding to the control cabinet is provided on the heat exchange part 210 of the control cabinet. This unique structural design provides a strong guarantee for achieving efficient heat exchange. When a raised structure is adopted on the heat exchange part 210 of the control cabinet, the raised part of the heat exchange part 210 of the control cabinet can be accurately embedded in the corresponding groove position of the control cabinet 300. This embedding method makes the connection between the heat exchange part and the control cabinet tight and greatly reduces the thermal resistance between the two. The reduction of thermal resistance means that heat can be transferred from the control cabinet to the heat exchange part more quickly and smoothly, thereby achieving efficient heat exchange.

[0078] When the heat exchange part 210 of the control cabinet adopts a groove structure, the heat exchange part 210 of the control cabinet is connected with the protrusion structure on the control cabinet 300 through the groove. The corresponding protrusion structure of the control cabinet 300 is embedded in the groove of the heat exchange part, and a tight fit effect is also achieved. This tight fit connection method not only ensures the high efficiency of heat transfer, but also enhances the stability of the overall structure to a certain extent.

[0079] By means of such protrusion embedding or groove docking, the control cabinet heat exchange part 210 fits tightly on the outer surface of the control cabinet 300. Compared with the traditional heat exchange method, this design greatly increases the heat exchange area, so that more heat can be transferred per unit time. The efficient heat exchange performance can effectively reduce the temperature inside the control cabinet 300, ensuring that the electronic components work in a suitable temperature environment, thereby improving the reliability and stability of the equipment and extending the service life of the equipment. At the same time, this structural design is relatively simple, easy to manufacture and install, has high practicality and economy, and provides a practical solution to the heat dissipation problem of industrial control cabinets.

[0080] In some embodiments, the control cabinet heat exchange part 210 is provided with a slot structure or a snap structure that matches the control cabinet 300. The control cabinet heat exchange part 210 is connected to the control cabinet 300 through the slot structure or the snap structure so that the control cabinet heat exchange part 210 is firmly connected to the control cabinet.

[0081] The control cabinet heat exchange part 210 is connected to the control cabinet 300 through a slot structure or a buckle structure, both of which can firmly connect the control cabinet heat exchange part 210 to the control cabinet 300. This firm connection not only ensures the stability of the control cabinet heat exchange part 210 during operation, but also ensures that its efficient heat exchange function can be normally exerted, further improving the overall reliability and service life of the control cabinet 300.

[0082] In some embodiments, the control cabinet heat exchange part 210 is configured as a reciprocating structure attached to the outer wall of the control cabinet.

[0083] The gyratory reciprocating structure can greatly increase the contact area between the control cabinet heat exchange part 210 and the control cabinet in a limited space, so that heat can be transferred more fully, the heat exchange efficiency can be improved, and the temperature in the control cabinet 300 can be more effectively reduced. This structure can be closely attached to the outer wall of the control cabinet 300 without occupying too much additional space, and is particularly suitable for occasions with limited space. The gyratory reciprocating heat exchange part can cleverly utilize the space on the outer wall of the control cabinet to achieve efficient heat dissipation without making the overall layout appear bloated.

[0084] See also Figure 6In some embodiments, at least one ventilation hole 301 is provided on the top of the control cabinet, and the control cabinet heat exchange unit 210 is disposed on the top of the control cabinet and is arranged opposite to the ventilation hole 301 .

[0085] In order to improve the heat dissipation problem of the control cabinet, at least one ventilation hole 301 is provided on the top of the control cabinet, and the ventilation hole 301 plays an important role in the heat dissipation process. When the electronic components in the control cabinet generate heat, the hot air will naturally rise. The control cabinet heat exchange unit 210 installed on the top uses its own heat exchange principle to cool down the rising hot air. The air cooled by the control cabinet heat exchange unit 210 will naturally sink due to the increase in density. This cycle of hot air rising and cold air sinking forms air convection in the control cabinet.

[0086] The formation of air convection greatly accelerates the heat dissipation. Compared with the traditional heat dissipation method, this natural convection heat dissipation not only does not require additional power equipment, such as fans, etc., reducing equipment costs and energy consumption, but also avoids the problem of heat dissipation failure caused by fan failure, and improves the reliability of the heat dissipation system. At the same time, the natural convection method allows the air in the control cabinet to exchange heat evenly, avoiding the occurrence of local overheating, and further ensuring the stable operation of electrical equipment.

[0087] The number of ventilation holes 301 is not specifically limited in the embodiment of the present application, and the number of ventilation holes 301 may be one or more.

[0088] The shape of the ventilation holes 301 is not specifically limited in the embodiment of the present application, and may be circular, square, or other regular or irregular shapes. The shapes of the plurality of ventilation holes 301 may be the same or different.

[0089] In the embodiment of the present application, the aperture size of the ventilation hole 301 is not specifically limited and can be set as needed. For example, the aperture of the ventilation hole 301 corresponding to the core component can be larger than the apertures of other ventilation holes 301.

[0090] The control cabinet heat exchange part 210 may also be located on the side wall of the control cabinet 300 , but the present application is not limited thereto.

[0091] In some embodiments, a humidity sensor component and a dehumidification device are provided in the control cabinet. When the humidity signal of the humidity sensor component is higher than a set value, the control cabinet controls the dehumidification device to perform a dehumidification operation.

[0092] The humidity sensor component can monitor the humidity changes inside the control cabinet in real time. When the humidity signal detected by the humidity sensor component is higher than the preset set value, the signal will be immediately transmitted to the control cabinet. For example, the humidity sensor component uses special sensing materials and is extremely sensitive to water molecules in the air. It generates changes in electrical signals through interaction with water molecules, thereby converting humidity information into electrical signals that can be recognized by the control cabinet. The intelligent control system inside the control cabinet quickly analyzes and processes the signal. Once it is confirmed that the humidity exceeds the set range, it quickly issues a control command to start the dehumidification device to perform dehumidification operations. The dehumidification device is an executive component that ensures a dry environment inside the control cabinet. When receiving the start command issued by the control cabinet, the dehumidification device quickly starts working to efficiently reduce the humidity inside the control cabinet.

[0093] Exemplarily, the set point of humidity is 30%-50% RH.

[0094] During 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, greatly improving the operating stability and reliability of the equipment, reducing equipment failures and damage caused by humidity problems, and providing a solid guarantee for the continuous and efficient operation of the equipment.

[0095] See also Figures 1 to 3 In some embodiments, the carbon dioxide heat pump control cabinet self-cooling system further includes a heat recovery device 160, and the heat recovery device 160 exchanges heat with the first section 101 and the second section 102 respectively.

[0096] The heat recovery device 160 is a device capable of achieving heat exchange. It utilizes the temperature difference between the low-temperature carbon dioxide working medium and the high-temperature carbon dioxide working medium in the loop to transfer the heat in the high-temperature carbon dioxide working medium to the low-temperature carbon dioxide working medium, thereby improving the energy utilization efficiency of the entire system.

[0097] Exemplarily, the heat recovery device 160 is disposed between the evaporation device 140 and the compression device 110 of the first section 101 , and between the cooling device 120 and the throttling device 130 of the second section 102 .

[0098] 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 properties. When the heat regenerator 160 exchanges heat with the second section 102, the carbon dioxide fluid with a relatively high temperature in the second section 102 flows into the heat regenerator 160 with heat. The special structure inside the heat regenerator 160, such as efficient heat exchange fins or pipes with good heat conductivity, enables heat to be transferred quickly and fully. This heat is transferred to the low-temperature fluid of the first section 101 that flows in the heat regenerator 160 in the opposite direction to the fluid of the first section 101. After absorbing heat, the temperature of the low-temperature fluid of the first section 101 rises, thereby changing its own physical properties, laying the foundation for subsequent recycling in the system. The heat exchange process between the heat regenerator 160 and the first section 101 is also based on the principle of heat transfer from the high-temperature area to the low-temperature area. When the low-temperature fluid of the first section 101 flows through the heat regenerator 160, it continuously absorbs the heat transferred from the high-temperature fluid of the second section 102. As the heat exchange continues, the temperature of the fluid in the first section 101 gradually rises until it reaches a temperature that meets the specific requirements of the system.

[0099] 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 recycling heat, additional energy consumption is reduced and operating costs are reduced; on the other hand, the temperature distribution of the fluid in the system is optimized, making the operation of the entire self-cooling system more stable and reliable.

[0100] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in 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, comprising a compression device, a cooling device, a throttling device and an evaporation device interconnected by a first pipeline, wherein the compression device has a first inlet and a first outlet, the evaporation device comprises a second inlet and a second outlet, and the carbon dioxide heat pump circuit further comprises 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 part and a second pipeline. The control cabinet heat exchange part 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 part is used to contact the control cabinet for heat exchange.

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

3. The self-cooling system of the carbon dioxide heat pump control cabinet according to claim 1 or 2, characterized in that: The heat exchange part of the control cabinet includes a heat exchange pipeline and a plurality of heat dissipation fins arranged at intervals, the heat exchange pipeline is connected to the second pipeline, the heat exchange pipeline is arranged at intervals along the extension direction of the heat dissipation fins, and the two ends of the heat dissipation fins in their own extension direction are in contact with the outer shell of the control cabinet; Optionally, ventilation equipment is provided on the periphery of the heat exchange part of the control cabinet, and the ventilation equipment is used to accelerate the heat exchange between the heat exchange part of the control cabinet and the control cabinet.

4. The carbon dioxide heat pump control cabinet self-cooling system according to claim 1 or 2, characterized in that: The first section of the first pipeline is provided with a first control valve, and the second pipeline is provided with a second control valve. The first control valve is used to control the closing of the first pipeline according to the temperature adjustment requirements of the control cabinet, and the second control valve controls the conduction of the second pipeline to allow the carbon dioxide working medium to enter the heat exchange part 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 be connected, and the second control valve controls the second pipeline to be closed, so that the carbon dioxide working medium works in the carbon dioxide heat pump circuit.

5. The carbon dioxide heat pump control cabinet self-cooling system according to claim 4 is characterized in that: It also includes a temperature sensing component, and when the temperature signal of 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 of 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 carbon dioxide heat pump control cabinet self-cooling system according to claim 1 or 2, characterized in that: The heat exchange part of the control cabinet is connected to the control cabinet via a retractable connection device, and the retractable connection device allows the heat exchange part of the control cabinet to be adjusted relative to the control cabinet to adapt to different installation spaces and heat dissipation requirements.

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

8. The carbon dioxide heat pump control cabinet self-cooling system according to claim 2 is characterized in that: At least one ventilation hole is arranged on the top of the control cabinet, and the heat exchange part of the control cabinet is arranged on the top of the control cabinet and is arranged opposite to the ventilation hole.

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

10. The carbon dioxide heat pump control cabinet self-cooling system 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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