Intelligent hydraulic air conditioning system for insulated boom truck and control method thereof

Abstract

This application discloses an intelligent hydraulic air conditioning system and its control method for an insulated bucket truck, relating to the field of vehicle-mounted hydraulic equipment technology. The system includes a hydraulic generator, an air conditioning component, a sensor component, a hydraulic distribution component, and a control module. The sensor component collects operating parameters of the environment inside the bucket of the insulated bucket truck, the hydraulic generator, and the air conditioning component, and transmits these parameters to the control module. The hydraulic distribution component includes a hydraulic distribution unit, a common oil inlet passage, and two independent oil outlet passages (first and second). The common oil inlet passage is used to connect to an external hydraulic power source. The control module outputs differentiated control signals to the hydraulic distribution unit based on changes in operating parameters. The hydraulic distribution unit independently adjusts the hydraulic oil flow rates of the first and second oil outlet passages according to the differentiated control signals. This solution improves the adaptability of the hydraulic air conditioning system of the insulated bucket truck to multiple operating conditions.

Description

Technical Field

[0001] This application relates to the field of vehicle-mounted hydraulic equipment technology, and in particular to an intelligent hydraulic air conditioning system for an insulated bucket truck and its control method. Background Technology

[0002] Insulated bucket trucks are widely used for high-altitude live-line work. The onboard air conditioning directly affects the comfort of operators inside the bucket. Hydraulic-driven air conditioning is gradually being adopted in insulated bucket trucks due to its convenient power source. Currently, most hydraulic air conditioning systems in insulated bucket trucks use a single-circuit hydraulic oil supply mode. The hydraulic power source outputs oil to supply the air conditioning load uniformly, and the hydraulic circuit can only synchronize the overall flow rate. During operation, the air conditioning compressor and cooling fan share the same hydraulic control circuit, and their oil supply flow is linked, making it impossible to adapt the oil supply to different air conditioning loads. When the environment inside the bucket or the generator's operating conditions fluctuate, each load of the air conditioning system cannot receive hydraulic oil supplied according to its own operating conditions. This easily leads to a mismatch between the air conditioning cooling output and the cooling conditions, making it difficult to simultaneously meet the bucket environment regulation needs and the onboard generator's operating status, thus limiting the equipment's adaptability to different operating conditions. Summary of the Invention

[0003] The purpose of this application is to provide an intelligent hydraulic air conditioning system and its control method for an insulated bucket truck, aiming to solve the technical problem of mutual binding of oil supply regulation for different hydraulic loads in the prior art.

[0004] To achieve the above objectives, this application provides an intelligent hydraulic air conditioning system for an insulated bucket truck, including a hydraulic generator, an air conditioning component, a sensor component, a hydraulic distribution component, and a control module; The sensor assembly is used to collect the operating parameters of the environment inside the insulated bucket, the hydraulic generator, and the air conditioning assembly, and transmit them to the control module; The hydraulic distribution assembly includes a hydraulic distribution unit, a common oil inlet passage, and two independent oil outlet passages, wherein the common oil inlet passage is used to connect to an external hydraulic power source. The control module is used to output differentiated control signals to the hydraulic distribution unit according to the changes in the operating parameters; The hydraulic distribution unit is used to independently adjust the hydraulic oil flow rate of the first oil outlet passage and the second oil outlet passage according to the differentiated control signal.

[0005] In some optional embodiments, the hydraulic distribution unit includes a first proportional flow valve and a second proportional flow valve; the first proportional flow valve is connected in series in the first oil outlet passage, and the second proportional flow valve is connected in series in the second oil outlet passage; the control module is electrically connected to the first proportional flow valve and the second proportional flow valve respectively, and the differentiated control signals output by the control module are applied to the first proportional flow valve and the second proportional flow valve respectively to adjust the opening degree of the first proportional flow valve and the second proportional flow valve.

[0006] In some optional embodiments, the common oil inlet passage is connected to the oil inlet of the first proportional flow valve and the oil inlet of the second proportional flow valve, respectively; the first oil outlet passage is configured with a first return oil branch, and the second oil outlet passage is configured with a second return oil branch; both the first return oil branch and the second return oil branch are used to guide the hydraulic oil back to the return oil side of the external hydraulic power source.

[0007] In some optional embodiments, the air conditioning component includes an air conditioning compressor and a cooling fan; the first oil outlet passage is connected to the hydraulic drive port of the air conditioning compressor, and the first oil outlet passage is used to supply hydraulic oil to the air conditioning compressor; the second oil outlet passage is connected to the hydraulic drive port of the hydraulic generator, and the second oil outlet passage is used to supply hydraulic oil to the hydraulic generator. The hydraulic generator is used to supply power to the cooling fan and control module of the air conditioning component; In some optional embodiments, the sensor assembly includes a bucket interior temperature and humidity sensor, a generator status sensor, a compressor pressure sensor, and a compressor speed sensor; the bucket interior temperature and humidity sensor is installed inside the bucket of the insulated bucket truck and is used to collect the ambient temperature and humidity parameters inside the bucket; the generator status sensor is used to collect the output voltage, output current, and speed operating parameters of the hydraulic generator; the compressor pressure sensor is used to collect the refrigerant pressure parameters on the high and low pressure sides of the air conditioning refrigeration compressor; and the compressor speed sensor is used to collect the actual speed parameters of the compressor.

[0008] In some optional embodiments, the control module stores a target temperature and humidity threshold; the control module receives real-time temperature and humidity signals collected by the temperature and humidity sensor inside the bucket, compares the real-time temperature and humidity signals with the target temperature and humidity threshold, and reads the output load of the hydraulic generator and the refrigerant pressure parameters of the compressor to generate the differentiated control signal; the differentiated control signal is used to adjust the hydraulic oil flow rate output from the first oil outlet passage to the air conditioning refrigeration compressor and the hydraulic oil flow rate output from the second oil outlet passage to the hydraulic generator.

[0009] In some optional embodiments, the control module also reads the output load data of the hydraulic generator; when the actual output load of the hydraulic generator exceeds a preset load upper limit threshold, the control module outputs a load reduction intervention signal to the hydraulic distribution unit, and the load reduction intervention signal is used to adjust the hydraulic oil output flow rate of the first oil outlet passage and the second oil outlet passage.

[0010] In some optional embodiments, the hydraulic distribution assembly further includes an overflow protection branch, one end of which is connected to a common oil inlet passage, and the other end is used to guide hydraulic oil back to the return side of an external hydraulic power source; an overflow valve is provided on the overflow protection branch; when the oil inlet pressure of the common oil inlet passage exceeds a preset pressure threshold, the overflow valve performs an opening action, and the overflow protection branch is activated.

[0011] Furthermore, this application also provides a control method applied to the intelligent hydraulic air conditioning system of the insulated bucket truck described above, the control method comprising: Collect operating parameters of the environment inside the insulated bucket, the hydraulic generator, and the air conditioning components; The collected operating parameters are parsed and processed; Based on the changes in the analyzed operating parameters, differentiated control signals are generated; Based on differentiated control signals, the hydraulic oil flow rate of the first oil outlet passage and the hydraulic oil flow rate of the second oil outlet passage are independently adjusted.

[0012] In some optional embodiments, differentiated control signals are generated based on changes in the parsed operating parameters, including: From the analyzed operating parameters, the ambient temperature and humidity parameters inside the bucket, the output load parameters of the hydraulic generator, and the refrigerant pressure parameters of the air conditioning component are extracted. The environmental temperature and humidity parameters are compared with the pre-stored target temperature and humidity thresholds; Based on the comparison results, the output load parameters of the hydraulic generator, and the refrigerant pressure parameters of the air conditioning component, a first sub-control signal corresponding to the first oil outlet path and a second sub-control signal corresponding to the second oil outlet path are generated respectively. The first sub-control signal is combined with the second sub-control signal to form the differentiated control signal.

[0013] The above-mentioned technical solution of this application has at least the following beneficial technical effects: The technical solution of this application uses sensor components to collect operating parameters of the insulated bucket truck's internal environment, hydraulic generator, and air conditioning components, and transmits them to the control module. The control module outputs differentiated control signals to the hydraulic distribution unit based on changes in operating parameters. The hydraulic distribution unit then independently adjusts the hydraulic oil flow of the independent first and second oil outlet channels by relying on an external hydraulic power source connected to a common oil inlet channel. This removes the binding constraint of oil supply adjustment for different air conditioning hydraulic loads, which is beneficial for configuring hydraulic oil supply according to the actual working conditions of different loads. The sensor components collect multi-dimensional operating parameters in real time, providing input basis for the control module to output control signals. The differentiated control signals output by the control module drive the hydraulic distribution unit to decouple and regulate the two oil outlet channels. The various technical features work together to dynamically adapt to the hydraulic oil supply requirements of each air conditioning load according to the internal environment and hydraulic generator operating conditions. This reduces the cascading interference caused by changes in the operating conditions of a single load on the oil supply status of another load, and improves the adaptability of the insulated bucket truck's hydraulic air conditioning to multiple working conditions. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the architecture of an embodiment of the intelligent hydraulic air conditioning system for an insulated bucket truck provided in this application; Figure 2 This is a flowchart illustrating an embodiment of the control method provided in this application; Figure 3 This is an overall logic flowchart of an embodiment of the control method provided in this application; Figure 4 This is a flowchart of the hydraulic generator state adjustment logic of an embodiment of the control method provided in this application; Figure 5 This is a flowchart illustrating the air conditioning operation status adjustment logic of an embodiment of the control method provided in this application.

[0015] Figure label: 1. Hydraulic generator; 2. Air conditioning assembly; 21. Air conditioning compressor; 3. Sensor assembly; 31. Temperature and humidity sensor inside the bucket; 32. Generator status sensor; 33. Compressor pressure sensor; 4. Hydraulic distribution assembly; 41. Hydraulic distribution unit; 411. First proportional flow valve; 412. Second proportional flow valve; 42. Common oil inlet passage; 43. First oil outlet passage; 44. Second oil outlet passage; 5. Control module. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this application. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this application.

[0017] The embodiments described in this application are only some, not all, of the embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments described herein without inventive effort are within the scope of protection of this application.

[0018] Insulated bucket trucks are widely used for high-altitude live-line work. The onboard air conditioning directly affects the comfort of operators inside the bucket. Hydraulic-driven air conditioning is gradually being adopted in insulated bucket trucks due to its convenient power source. Currently, most hydraulic air conditioning systems in insulated bucket trucks use a single-circuit hydraulic oil supply mode. The hydraulic power source outputs oil to supply the air conditioning load uniformly, and the hydraulic circuit can only synchronize the overall flow rate. During operation, the air conditioning compressor and cooling fan share the same hydraulic control circuit, and their oil supply flow is linked, making it impossible to adapt the oil supply to different air conditioning loads. When the environment inside the bucket or the generator's operating conditions fluctuate, each load of the air conditioning system cannot receive hydraulic oil supplied according to its own operating conditions. This easily leads to a mismatch between the air conditioning cooling output and the cooling conditions, making it difficult to simultaneously meet the bucket environment regulation needs and the onboard generator's operating status, thus limiting the equipment's adaptability to different operating conditions.

[0019] To address the aforementioned technical problems, this application provides an intelligent hydraulic air conditioning system for an insulated bucket truck.

[0020] In some alternative embodiments, please refer to Figure 1 The intelligent hydraulic air conditioning system of the insulated bucket truck includes a hydraulic generator 1, an air conditioning component 2, a sensor component 3, a hydraulic distribution component 4, and a control module 5. The sensor component 3 collects the environmental parameters inside the bucket of the insulated bucket truck, the operating parameters of the hydraulic generator 1 and the air conditioning component 2, and transmits them to the control module 5. The hydraulic distribution component 4 includes a hydraulic distribution unit 41, a common oil inlet passage 42, and two independent oil outlet passages 43 and 44. The common oil inlet passage 42 is used to connect to an external hydraulic power source. The control module 5 outputs differentiated control signals to the hydraulic distribution unit 41 according to changes in operating parameters. The hydraulic distribution unit 41 independently adjusts the hydraulic oil flow rates of the first oil outlet passage 43 and the second oil outlet passage 44 according to the differentiated control signals.

[0021] The specific implementation process of one embodiment of this application is as follows: Hydraulic oil from an external hydraulic power source is input into the hydraulic distribution unit 41 via the common oil inlet passage 42 of the hydraulic distribution component 4. The hydraulic distribution unit 41 divides the hydraulic oil into two independent outlet passages, a first outlet passage 43 and a second outlet passage 44. The hydraulic oil in the first outlet passage 43 drives the compressor of the air conditioning component 2 to operate and achieve cooling. The hydraulic oil in the second outlet passage 44 drives the hydraulic generator 1 to generate electricity. The electrical energy generated by the hydraulic generator 1 is converted by the inverter charger and then supplied to the air conditioning fan of the air conditioning component 2 and the control module 5. The sensor component 3 collects the operating parameters of the compressor, the hydraulic generator 1, the internal environment of the insulated bucket truck, and the air conditioning component 2 in real time and sends them to the control module 5. After receiving the operating parameters, the control module 5 identifies the changes in the parameters and outputs differentiated control signals to the hydraulic distribution unit 41. The hydraulic distribution unit 41 responds to the differentiated control signals and independently adjusts the hydraulic oil flow rates of the first outlet passage 43 and the second outlet passage 44, thereby changing the working state of the compressor and the hydraulic generator 1 and realizing the coordinated control of the two paths.

[0022] The technical solution of this application uses sensor component 3 to collect the operating parameters of the environment inside the insulated bucket truck, hydraulic generator 1, and air conditioning component 2, and transmits them to control module 5. Control module 5 outputs differentiated control signals to hydraulic distribution unit 41 based on changes in operating parameters. Hydraulic distribution unit 41 then independently adjusts the hydraulic oil flow of the independent first oil outlet channel 43 and second oil outlet channel 44 by relying on the external hydraulic power source connected to the common oil inlet channel 42. This can remove the binding constraint of oil supply adjustment for different air conditioning hydraulic loads, which is conducive to configuring the hydraulic oil supply for different load actual working conditions. Sensor component 3 collects multi-dimensional operating parameters in real time to provide input basis for control module 5 to output control signals. The differentiated control signals output by control module 5 drive hydraulic distribution unit 41 to decouple and regulate the two oil outlet channels. The various technical features work together to dynamically adapt to the hydraulic oil supply requirements of each air conditioning load according to the environment inside the bucket and the working condition of hydraulic generator 1. This reduces the cascading interference caused by changes in the working condition of a single load on the oil supply status of another load, and improves the adaptability of the hydraulic air conditioning of the insulated bucket truck to multiple working conditions.

[0023] In some optional embodiments, the hydraulic distribution unit 41 includes a first proportional flow valve 411 and a second proportional flow valve 412; the first proportional flow valve 411 is connected in series on the first oil outlet passage 43, and the second proportional flow valve 412 is connected in series on the second oil outlet passage 44; the control module 5 is electrically connected to the first proportional flow valve 411 and the second proportional flow valve 412 respectively, and the differentiated control signals output by the control module 5 act on the first proportional flow valve 411 and the second proportional flow valve 412 respectively to adjust the opening degree of the first proportional flow valve 411 and the second proportional flow valve 412.

[0024] Specifically, the first proportional flow valve 411 is connected in series on the oil pipe section of the first oil outlet passage 43, and the second proportional flow valve 412 is connected in series on the oil pipe section of the second oil outlet passage 44. The first proportional flow valve 411 and the second proportional flow valve 412 are electrically connected to the control module 5 through the control wiring harness. The differentiated control signals output by the control module 5 are current signals of different magnitudes. The current signals are respectively input to the first proportional flow valve 411 and the second proportional flow valve 412. The valve core in the valve body moves accordingly with the magnitude of the input current, thereby changing the actual flow opening of the valve port.

[0025] In this embodiment, the control module 5 outputs differential current control signals with different amplitudes to the first proportional flow valve 411 and the second proportional flow valve 412, which independently change the valve core displacement and valve opening of the first proportional flow valve 411 and the second proportional flow valve 412, thereby changing the hydraulic oil flow rate supplied to the air conditioning component 2 by the first oil outlet passage 43 and the hydraulic oil flow rate supplied to the hydraulic generator 1 by the second oil outlet passage 44. This is beneficial for the independent regulation of the compressor speed of the air conditioning component 2 and the speed of the hydraulic generator 1, and avoids interference with the working state of the other oil circuit when adjusting the flow rate of one oil circuit.

[0026] In some optional embodiments, the common oil inlet passage 42 is connected to the oil inlet of the first proportional flow valve 411 and the oil inlet of the second proportional flow valve 412 respectively; the first oil outlet passage 43 is configured with a first return oil branch, and the second oil outlet passage 44 is configured with a second return oil branch; the first return oil branch and the second return oil branch are both used to guide the hydraulic oil back to the return oil side of the external hydraulic power source.

[0027] Specifically, the outlet side of the common oil inlet passage 42 is connected to both the inlet of the first proportional flow valve 411 and the inlet of the second proportional flow valve 412. The hydraulic oil output from the external hydraulic power source is sent in parallel to the first proportional flow valve 411 and the second proportional flow valve 412 through the common oil inlet passage 42. The first return oil branch is formed by connecting the return oil port of the first proportional flow valve 411 to the external pipeline, and the second return oil branch is formed by connecting the return oil port of the second proportional flow valve 412 to the external pipeline. The ends of the first return oil branch and the second return oil branch are connected to the return oil side of the external hydraulic power source to form a complete hydraulic oil circulation loop.

[0028] In this embodiment, oil is supplied in parallel to the first proportional flow valve 411 and the second proportional flow valve 412 through a common oil inlet passage 42. At the same time, independent first and second return oil branches are set up to complete the hydraulic oil return of the two valves respectively. This allows the hydraulic oil after the two oil circuits have been working to be independently guided back to the return oil side of the external hydraulic power source. This helps to prevent pressure disturbances between the two oil circuits and maintain a stable pressure difference between the inlet and outlet of the first proportional flow valve 411 and the second proportional flow valve 412, thus ensuring the control accuracy of the valves in regulating the flow.

[0029] In some optional embodiments, the air conditioning component 2 includes an air conditioning compressor 21 and a cooling fan; a first oil outlet passage 43 is connected to the hydraulic drive port of the air conditioning compressor 21, and the first oil outlet passage 43 is used to deliver hydraulic oil to the air conditioning compressor 21; a second oil outlet passage 44 is connected to the hydraulic drive port of a hydraulic generator, and the second oil outlet passage 44 is used to deliver hydraulic oil to the hydraulic generator.

[0030] Specifically, the air conditioning compressor 21 is equipped with a hydraulic motor, and the air conditioning compressor 21 is connected to the hydraulic motor for transmission. The hydraulic generator is also equipped with a hydraulic motor, and the hydraulic generator is connected to the corresponding hydraulic motor for transmission. The first oil outlet passage 43 is connected to the hydraulic drive port of the hydraulic motor on the side of the air conditioning compressor 21 through a hydraulic pipeline. The second oil outlet passage 44 is connected to the hydraulic drive port of the hydraulic motor on the side of the hydraulic generator through a hydraulic pipeline. After the hydraulic oil enters the hydraulic motor, it drives the motor shaft to rotate. The rotational power of the shaft drives the air conditioning compressor 21 and the hydraulic generator to operate respectively.

[0031] In this embodiment, hydraulic power is supplied independently to the air conditioning compressor 21 and the hydraulic motor corresponding to the hydraulic generator through the first oil outlet passage 43 and the second oil outlet passage, respectively. The cooling output capacity of the air conditioning compressor 21 and the air volume of the cooling fan can be adjusted separately. This is beneficial to match the cooling power and the cooling air volume according to the working conditions, and avoid the situation of excessive or insufficient cooling due to the cooling air volume passively changing with the cooling power.

[0032] In some optional embodiments, the sensor assembly 3 includes a bucket interior temperature and humidity sensor 31, a generator status sensor 32, a compressor pressure sensor 33, and a compressor speed sensor; the bucket interior temperature and humidity sensor 31 is installed inside the bucket of the insulated bucket truck and is used to collect the ambient temperature and humidity parameters inside the bucket; the generator status sensor 32 is used to collect the output voltage, output current, and speed operating parameters of the hydraulic generator 1; the compressor pressure sensor 33 is used to collect the refrigerant pressure parameters on the high and low pressure sides of the air conditioning refrigeration compressor 21; and the compressor speed sensor is used to collect the actual speed parameters of the compressor.

[0033] Specifically, the bucket temperature and humidity sensor 31 is installed inside the bucket compartment of the insulated bucket truck, the generator status sensor 32 is mounted on the hydraulic generator 1 body, the compressor pressure sensor 33 is connected to the high-pressure side pipeline and the low-pressure side pipeline of the refrigerant circuit of the air conditioning compressor 21, and the compressor speed sensor is mounted on the compressor rotating shaft. The bucket temperature and humidity sensor 31, the generator status sensor 32, the compressor pressure sensor 33, and the compressor speed sensor are all connected to the control module 5 through signal harnesses. The analog signals collected by various sensors are transmitted to the control module 5 through the signal harnesses to complete signal analysis.

[0034] In this embodiment, the temperature and humidity sensor 31 inside the bucket, the generator status sensor 32, the compressor pressure sensor 33, and the compressor speed sensor collect multi-dimensional physical parameters of the bucket environment, the hydraulic generator 1, and the air conditioning refrigeration compressor 21, respectively. This allows for the simultaneous acquisition of detailed information on environmental conditions, power generation output, refrigerant system status, and compressor operating status. This is beneficial for the control module 5 to identify subtle changes in system conditions based on multi-dimensional measured parameters, thereby reducing the problem of misjudgment of operating conditions caused by the acquisition of a single parameter.

[0035] In some optional embodiments, the control module 5 stores a target temperature and humidity threshold; the control module 5 receives real-time temperature and humidity signals collected by the temperature and humidity sensor 31 inside the bucket, compares the real-time temperature and humidity signals with the target temperature and humidity thresholds, and the control module 5 reads the output load of the hydraulic generator 1 and the refrigerant pressure parameters of the compressor to generate a differentiated control signal; the differentiated control signal is used to adjust the hydraulic oil flow rate output by the first oil outlet passage 43 to the air conditioning refrigeration compressor 21 and the hydraulic oil flow rate output by the second oil outlet passage 44 to the hydraulic generator.

[0036] Specifically, the non-volatile storage unit inside the control module 5 pre-stores the target temperature and humidity threshold. This target temperature and humidity threshold can be preset according to the working conditions of live operation. The control module 5 obtains the real-time temperature and humidity signal output by the temperature and humidity sensor 31 in the bucket through the signal harness. At the same time, it reads the output load data of the hydraulic generator 1 collected by the generator status sensor 32 and the compressor refrigerant pressure parameter collected by the compressor pressure sensor 33. The control module 5 compares the real-time temperature and humidity signal with the pre-stored target temperature and humidity threshold, and combines the measured values ​​of the output load of the hydraulic generator 1 and the compressor refrigerant pressure to generate a differentiated control signal.

[0037] This embodiment compares the real-time temperature and humidity of the bucket with the preset target temperature and humidity thresholds, and simultaneously couples the output load of the hydraulic generator 1 and the refrigerant pressure of the compressor to generate control signals. Instead of relying solely on the single condition of ambient temperature and humidity to output adjustment commands, this approach helps to balance the temperature control requirements of the bucket with the actual load-bearing capacity of the hydraulic generator and refrigerant system. It also prevents abnormal operating conditions caused by simply pursuing temperature and humidity compliance, such as overloading of the hydraulic generator 1 and exceeding the refrigerant pressure limit of the compressor.

[0038] In some optional embodiments, the control module 5 also reads the output load data of the hydraulic generator 1; when the actual output load of the hydraulic generator 1 exceeds the preset load upper limit threshold, the control module 5 outputs a load reduction intervention signal to the hydraulic distribution unit 41, and the load reduction intervention signal is used to adjust the hydraulic oil output flow of the first oil outlet passage 43 and the second oil outlet passage 44.

[0039] Specifically, the control module 5 retrieves the output load data of the hydraulic generator 1 collected by the generator status sensor 32. The internal storage unit of the control module 5 has a preset load upper limit threshold. The load upper limit threshold matches the maximum allowable output load of the hydraulic generator 1 for long-term reliable operation. The load reduction intervention signal is one of the differentiated control signals. The load reduction intervention signal is output in the form of current to the corresponding proportional flow valve inside the hydraulic distribution unit 41.

[0040] In this embodiment, the control module 5 continuously compares the actual output load of the hydraulic generator 1 with the preset load upper limit threshold. When the load exceeds the upper limit threshold, it outputs a load reduction intervention signal to synchronously adjust the hydraulic oil output flow of the first oil outlet passage 43 and the second oil outlet passage 44. This can simultaneously constrain the power consumption of the air conditioning refrigeration compressor 21 and the cooling fan, which is beneficial to timely suppress the load increase of the hydraulic generator 1 and avoid the problem of output voltage drop or component damage caused by the hydraulic generator 1 operating under overload for a long time.

[0041] In some optional embodiments, the hydraulic distribution component 4 also includes an overflow protection branch, one end of which is connected to the common oil inlet passage 42, and the other end is used to guide hydraulic oil back to the return oil side of the external hydraulic power source; an overflow valve is provided on the overflow protection branch; when the oil inlet pressure of the common oil inlet passage 42 exceeds a preset pressure threshold, the overflow valve performs an opening action, and the overflow protection branch is activated.

[0042] Specifically, the overflow protection branch is constructed using hydraulic pipelines. One end of the overflow protection branch is connected to the common oil inlet passage 42, and the other end of the overflow protection branch is connected to the return oil side of the external hydraulic power source. The overflow valve is installed on the pipeline of the overflow protection branch. The opening pressure of the overflow valve is set to a preset pressure threshold. The overflow valve is kept closed by the preload of the valve core spring. The oil pressure inside the common oil inlet passage 42 acts on the end face of the overflow valve core.

[0043] In this embodiment, an overflow protection branch with an overflow valve is set in parallel with the common oil inlet passage 42. When the oil inlet pressure of the common oil inlet passage 42 exceeds the preset pressure threshold, the overflow valve automatically opens to release pressure. The overpressure hydraulic oil flows directly back to the return oil side of the external hydraulic power source through the overflow protection branch. This can release excess pressure when the output pressure of the front hydraulic power source is abnormally high, which helps to prevent the common oil inlet passage 42 and the downstream first proportional flow valve 411 and second proportional flow valve 412 from being subjected to excessively high oil pressure, and protects the internal oil circuit and valves of the hydraulic distribution component 4 from damage due to overpressure.

[0044] In addition, this application also provides a control method applied to the intelligent hydraulic air conditioning system of the insulated bucket truck described above. Please refer to [link to relevant documentation]. Figure 2 The control method includes the following steps: Step 1: Collect operating parameters of the insulated bucket truck's internal environment, hydraulic generator 1, and air conditioning component 2; specifically, collect operating parameters of the insulated bucket truck's internal environment, hydraulic generator 1, and air conditioning component 2 according to a control cycle of 20ms to 50ms; the collected operating parameters include bucket cabin ambient temperature F1, air conditioning indoor unit temperature F2, compressor speed F3, hydraulic generator 1 speed F4, and hydraulic generator 1 operating voltage V; the bucket cabin ambient temperature F1 is collected through the bucket cabin temperature and humidity sensor 31, the air conditioning indoor unit temperature F2 is collected through the air conditioning indoor unit sensor, the compressor speed F3 is collected through the compressor speed sensor 33, and the hydraulic generator 1 speed F4 and hydraulic generator 1 operating voltage V are collected through the generator status sensor 32. All collected raw signals are transmitted to the control module 5.

[0045] Step 2: Analyze and process the acquired operating parameters; specifically, control module 5 performs signal analysis processing on the received raw acquired signals, completes signal filtering to remove instantaneous interference jitter data, and obtains stable and usable effective operating parameters such as cabin ambient temperature F1, air conditioner indoor unit temperature F2, compressor speed F3, hydraulic generator 1 speed F4, and hydraulic generator 1 working voltage V. The initial stable domain of the air conditioner is established, which is composed of the initialization parameters of compressor speed F3, hydraulic generator 1 speed F4, cabin ambient temperature F1, and air conditioner indoor unit temperature F2.

[0046] Step 3: Generate differentiated control signals based on the changes in the analyzed operating parameters; In some optional embodiments, step 3 includes the following specific steps: Step 31: Extract the ambient temperature and humidity parameters inside the bucket, the output load parameters of hydraulic generator 1, and the refrigerant pressure parameters of air conditioning component 2 from the processed operating parameters. Specifically, extract the ambient temperature and humidity parameters inside the bucket (F1), the output load parameters of hydraulic generator 1, and the refrigerant pressure parameters of air conditioning component 2 from the processed operating parameters. At the same time, read the compressor speed F3, the hydraulic generator 1 speed F4, and the hydraulic generator 1 operating voltage V for subsequent calculations.

[0047] Step 32: Compare the ambient temperature and humidity parameters with the pre-stored target temperature and humidity thresholds; specifically, compare the ambient temperature and humidity parameter F1 with the pre-stored target temperature and humidity thresholds to determine the current working state. When F1 > 35℃, it is determined to be a high temperature full load state, and when F1 ≤ 35℃, it is determined to be a normal temperature light load state. The state determination result is output for subsequent control calculations.

[0048] Step 33: Based on the comparison results, the output load parameters of the hydraulic generator 1 and the refrigerant pressure parameters of the air conditioning component 2, generate a first sub-control signal corresponding to the first oil outlet passage 43 and a second sub-control signal corresponding to the second oil outlet passage 44, respectively. Specifically, based on the operating condition comparison results obtained in step 32, the output load parameters of hydraulic generator 1, and the refrigerant pressure parameters of air conditioning component 2, and combined with compressor speed F3, hydraulic generator 1 speed F4, and hydraulic generator 1 operating voltage V, stability margin calculation is performed to complete the dynamic reconstruction of the air conditioning operation stability domain. When hydraulic generator 1 speed F4 < 750, the generator proportional valve current increases by 2mA per second. When 750 ≤ F4 ≤ 850, the generator proportional valve current remains unchanged. When F4 > 850, the generator proportional valve current decreases by 2mA per second. When hydraulic generator 1 operating voltage V < 24V, the generator proportional valve current increases by 2mA per second. When 24V ≤ V ≤ 28V, the generator proportional valve current remains unchanged. When V > 28V, the generator proportional valve current decreases by 2mA per second. Combined with refrigerant pressure and air conditioning indoor unit temperature F2, a first sub-control signal corresponding to the first oil outlet passage 43 and a second sub-control signal corresponding to the second oil outlet passage 44 are generated.

[0049] Step 34: Combine the first sub-control signal and the second sub-control signal to form a differentiated control signal. Specifically, the first sub-control signal and the second sub-control signal are combined and encapsulated to form a complete differentiated control signal. The differentiated control signal is a current signal, which is output to the first proportional flow valve 411 and the second proportional flow valve 412 respectively.

[0050] Step 4: Based on the differentiated control signals, the hydraulic oil flow rates of the first oil outlet passage 43 and the second oil outlet passage 44 are independently adjusted. Specifically, the differentiated control signals are output to the first proportional flow valve 411 and the second proportional flow valve 412 inside the hydraulic distribution unit 41. The first proportional flow valve 411 changes its valve opening according to the first sub-control signal to adjust the hydraulic oil flow rate of the first oil outlet passage 43, and the second proportional flow valve 412 changes its valve opening according to the second sub-control signal to adjust the hydraulic oil flow rate of the second oil outlet passage 44. In this way, the working states of the air conditioning refrigeration compressor 21 and the cooling fan are adjusted respectively, and the system is pulled back to the reconstructed stable domain to achieve dynamic balance of the system.

[0051] The technical solution of this application will be described in detail below with reference to a specific embodiment. Please refer to... Figure 1 In this embodiment, the intelligent hydraulic air conditioning system of the insulated bucket truck includes a hydraulic generator 1, an air conditioning component 2, a sensor component 3, a hydraulic distribution component 4, and a control module 5. The hydraulic distribution component 4 includes a hydraulic distribution unit 41, a common oil inlet passage 42, a first oil outlet passage 43, and a second oil outlet passage 44. The hydraulic distribution unit 41 is composed of a first proportional flow valve 411 and a second proportional flow valve 412. The sensor component 3 includes a bucket temperature and humidity sensor 31, a generator status sensor 32, a compressor pressure sensor 33, and a compressor speed sensor. The control module 5 has pre-stored target temperature and humidity thresholds, load upper limit thresholds, and various judgment thresholds.

[0052] Please see Figure 3 , Figure 3 This is the overall logic flowchart of this embodiment. The process completes sensor signal acquisition and working status determination, and then divides into two branches: high temperature full load state and normal temperature light load state, to carry out air conditioning operation status adjustment and generator status adjustment respectively. The temperature sensor collects F1 and F2 signals, the speed sensor collects F3 and F4 signals, and at the same time completes the acquisition of the working voltage V. The controller outputs valve group currents I1 and I2. Using the ambient temperature as the judgment condition, when the ambient temperature is >35℃, it enters the high temperature full load state and performs air conditioning operation status adjustment and generator status adjustment respectively. When the ambient temperature is ≤35℃, it enters the normal temperature light load state and similarly performs air conditioning operation status adjustment and generator status adjustment respectively.

[0053] Please see Figure 4 , Figure 4This is a flowchart of the hydraulic generator state adjustment logic in this embodiment. The process uses generator speed F and generator output voltage V as dual judgment conditions to dynamically adjust the generator proportional valve I1. When F < 750, the generator proportional valve I1 increases by 2mA per second. When 750 ≤ F ≤ 850, the generator proportional valve I1 remains unchanged; when F > 850, the generator proportional valve I1 decreases by 1mA per second. A voltage judgment branch is then added: when V < 24V, the generator proportional valve I1 increases by 2mA per second. When 24V < V < 28V, the generator proportional valve I1 remains unchanged; when V > 28V, a generator fault is determined, and a shutdown and inspection command is output.

[0054] Please see Figure 5 , Figure 5 This is a flowchart illustrating the air conditioner operation status adjustment logic in this embodiment. The process adjusts the proportional valve I2 of the air conditioner under multiple conditions, including compressor speed F and indoor unit temperature T2, in both high-temperature full-load and normal-temperature light-load states. Ambient temperature T1 serves as the top-level judgment condition; if T1 ≥ 35℃, the system enters the high-temperature full-load state; if T1 < 35℃, it enters the normal-temperature light-load state.

[0055] Under high temperature and full load conditions, first read the compressor speed F: when F < 950, continue reading the air conditioner indoor unit temperature T2. If T2 > 10℃, the air conditioner proportional valve I2 increases by 2mA per second; if T2 ≤ 10℃, the air conditioner proportional valve I2 increases by 1mA per second. When 950 < F < 1050, read the air conditioner indoor unit temperature T2. If T2 > 10℃, the air conditioner proportional valve I2 remains unchanged; if T2 ≤ 10℃, the air conditioner proportional valve I2 decreases by 4mA per second. When F > 1050, read the air conditioner indoor unit temperature T2. If T2 > 10℃, the air conditioner proportional valve I2 decreases by 2mA per second; if T2 ≤ 10℃, the air conditioner proportional valve I2 decreases by 4mA per second. When T2 is detected to be > 15℃, output a shutdown command indicating that the air conditioner proportional valve I2 has exceeded the stop threshold.

[0056] Under normal temperature and light load conditions, the compressor speed F is read as follows: When F < 750, the indoor unit temperature T2 is read. If T2 > 10℃, the proportional valve I2 increases by 2mA per second; if T2 ≤ 10℃, the proportional valve I2 increases by 1mA per second. When 750 < F < 850, the indoor unit temperature T2 is read. If T2 > 10℃, the proportional valve I2 remains unchanged; if T2 ≤ 10℃, the proportional valve I2 decreases by 4mA per second. When F > 850, the indoor unit temperature T2 is read. If T2 > 10℃, the proportional valve I2 decreases by 2mA per second; if T2 ≤ 10℃, the proportional valve I2 decreases by 4mA per second. When T2 > 15℃ is detected, a shutdown command is output indicating that the proportional valve I2 has exceeded the stop threshold.

[0057] The specific working process of this embodiment is as follows: The intelligent hydraulic air conditioning system of the insulated bucket truck is powered on and started. The control module 5 drives the sensor component 3 to collect the operating parameters of the internal environment temperature and humidity of the bucket, the output voltage V of the hydraulic generator 1, the speed F4 of the hydraulic generator 1, the speed F3 of the air conditioning compressor 21, and the temperature T2 of the air conditioning unit according to the control cycle of 20ms~50ms. The raw collected signals are sent to the control module 5 for filtering and analysis to obtain stable and effective operating parameters; refer to Figure 3 Based on the collected ambient temperature T1, control module 5 determines the operating status and enters either high-temperature full-load state or normal-temperature light-load state; refer to Figure 4 The generator regulation logic uses generator speed F4 and output voltage V as judgment conditions to calculate the first sub-control signal corresponding to the generator side, namely the generator proportional valve control current I1; refer to Figure 5 The air conditioning component 2 adjustment logic, combined with the compressor speed F3 and the air conditioning indoor unit temperature T2, performs multi-level condition judgments to calculate the corresponding second sub-control signal on the air conditioning side, namely the air conditioning proportional valve control current I2; the control module 5 combines I1 and I2 to form differentiated control signals, which are output to the first proportional flow valve 411 and the second proportional flow valve 412 of the hydraulic distribution unit 41 respectively; the first proportional flow valve 411 receives I2 to adjust the hydraulic oil flow of the first oil outlet passage 43, thereby adjusting the output power of the air conditioning refrigeration compressor 21 and the cooling fan; the second proportional flow valve 412 receives I1 to adjust the hydraulic oil flow of the second oil outlet passage 44, thereby adjusting the output power of the hydraulic generator 1; the system cyclically executes the above acquisition-judgment-calculation-output process to continuously maintain the temperature and humidity inside the cabin within the target temperature and humidity threshold range, while constraining the operating parameters of the hydraulic generator 1 and the air conditioning refrigeration compressor 21 to not exceed their respective safety threshold ranges.

[0058] This application aims to protect an intelligent hydraulic air conditioning system and its control method for an insulated bucket truck. The technical solution of this application uses sensor assembly 3 to collect operating parameters of the environment inside the bucket of the insulated bucket truck, the hydraulic generator 1, and the air conditioning assembly 2, and transmits these parameters to control module 5. Control module 5 outputs differentiated control signals to hydraulic distribution unit 41 based on changes in operating parameters. Hydraulic distribution unit 41 then independently adjusts the hydraulic oil flow rates of the independent first oil outlet passage 43 and second oil outlet passage 44 via an external hydraulic power source connected through a common oil inlet passage 42, thereby relieving different hydraulic loads on the air conditioning system. The binding constraint of oil supply regulation is conducive to configuring the hydraulic oil supply volume according to the actual working conditions of different loads; the sensor component 3 collects multi-dimensional operating parameters in real time to provide input basis for the control module 5 to output control signals. The differentiated control signals output by the control module 5 drive the hydraulic distribution unit 41 to decouple and regulate the two oil outlet paths. The various technical features cooperate with each other and can dynamically adapt to the hydraulic oil supply requirements of each air conditioning load according to the environment inside the bucket and the working conditions of the hydraulic generator 1. This reduces the cascading interference caused by changes in the working conditions of a single load on the oil supply status of another load and improves the adaptability of the hydraulic air conditioning of the insulated bucket truck to multiple working conditions.

[0059] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this application and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this application should be included within the protection scope of this application. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. An intelligent hydraulic air conditioning system for an insulated bucket truck, characterized in that, It includes a hydraulic generator (1), an air conditioning unit (2), a sensor unit (3), a hydraulic distribution unit (4), and a control module (5); The hydraulic generator (1) is used to supply power to the air conditioning component (2) and the control module (5); the sensor component (3) is used to collect the environment inside the insulated bucket, the operating parameters of the hydraulic generator (1) and the air conditioning component (2), and transmit them to the control module (5). The hydraulic distribution assembly (4) includes a hydraulic distribution unit (41), a common oil inlet passage (42), and two independent oil outlet passages (43 and 44). The common oil inlet passage (42) is used to connect to an external hydraulic power source. The control module (5) is used to output differentiated control signals to the hydraulic distribution unit (41) according to the changes in the operating parameters; The hydraulic distribution unit (41) is used to independently adjust the hydraulic oil flow of the first oil outlet passage (43) and the second oil outlet passage (44) according to the differentiated control signal.

2. The intelligent hydraulic air conditioning system for the insulated bucket truck according to claim 1, characterized in that, The hydraulic distribution unit (41) includes a first proportional flow valve (411) and a second proportional flow valve (412); the first proportional flow valve (411) is connected in series on the first oil outlet passage (43), and the second proportional flow valve (412) is connected in series on the second oil outlet passage (44); the control module (5) is electrically connected to the first proportional flow valve (411) and the second proportional flow valve (412) respectively, and the differentiated control signal output by the control module (5) acts on the first proportional flow valve (411) and the second proportional flow valve (412) respectively to adjust the opening degree of the first proportional flow valve (411) and the second proportional flow valve (412); the hydraulic generator (1) is used to supply power to the cooling fan of the air conditioning component (2) and the control module (5).

3. The intelligent hydraulic air conditioning system for the insulated bucket truck according to claim 2, characterized in that, The common oil inlet passage (42) is connected to the oil inlet of the first proportional flow valve (411) and the oil inlet of the second proportional flow valve (412) respectively; the first oil outlet passage (43) is configured with a first return oil branch, and the second oil outlet passage (44) is configured with a second return oil branch; the first return oil branch and the second return oil branch are both used to guide the hydraulic oil back to the return oil side of the external hydraulic power source.

4. The intelligent hydraulic air conditioning system for the insulated bucket truck according to claim 3, characterized in that, The air conditioning component (2) includes an air conditioning compressor (21) and a cooling fan; the first oil outlet passage (43) is connected to the hydraulic drive port of the air conditioning compressor (21), and the first oil outlet passage (43) is used to deliver hydraulic oil to the air conditioning compressor (21); the second oil outlet passage (44) is connected to the hydraulic drive port of the hydraulic generator, and the second oil outlet passage (44) is used to deliver hydraulic oil to the hydraulic generator.

5. The intelligent hydraulic air conditioning system for the insulated bucket truck according to claim 4, characterized in that, The sensor assembly (3) includes a bucket temperature and humidity sensor (31), a generator status sensor (32), a compressor pressure sensor (33), and a compressor speed sensor; The bucket temperature and humidity sensor (31) is installed inside the bucket compartment of the insulated bucket truck. The bucket temperature and humidity sensor (31) is used to collect the ambient temperature and humidity parameters inside the bucket compartment. The generator status sensor (32) is used to collect the output voltage, output current, and speed operating parameters of the hydraulic generator (1); The compressor pressure sensor (33) is used to collect the refrigerant pressure parameters on the high and low pressure sides of the air conditioning refrigeration compressor (21); The compressor speed sensor is used to collect the actual speed parameters of the compressor.

6. The intelligent hydraulic air conditioning system for the insulated bucket truck according to claim 5, characterized in that, The control module (5) stores the target temperature and humidity threshold; the control module (5) receives the real-time temperature and humidity signal collected by the temperature and humidity sensor (31) in the bucket, and compares the real-time temperature and humidity signal with the target temperature and humidity threshold; the control module (5) reads the output load of the hydraulic generator (1) and the refrigerant pressure parameters of the compressor, and generates the differentiated control signal; the differentiated control signal is used to adjust the hydraulic oil flow rate output by the first oil outlet passage (43) to the air conditioning refrigeration compressor (21) and the hydraulic oil flow rate output by the second oil outlet passage (44) to the hydraulic generator.

7. The intelligent hydraulic air conditioning system for the insulated bucket truck according to claim 6, characterized in that, The control module (5) also reads the output load data of the hydraulic generator (1); when the actual output load of the hydraulic generator (1) exceeds the preset load upper limit threshold, the control module (5) outputs a load reduction intervention signal to the hydraulic distribution unit (41), and the load reduction intervention signal is used to adjust the hydraulic oil output flow of the first oil outlet passage (43) and the second oil outlet passage (44).

8. The intelligent hydraulic air conditioning system for the insulated bucket truck according to claim 1, characterized in that, The hydraulic distribution component (4) also includes an overflow protection branch. One end of the overflow protection branch is connected to the common oil inlet passage (42), and the other end is used to guide the hydraulic oil back to the return oil side of the external hydraulic power source. An overflow valve is provided on the overflow protection branch. When the oil inlet pressure of the common oil inlet passage (42) exceeds the preset pressure threshold, the overflow valve performs an opening action, and the overflow protection branch is connected.

9. A control method, characterized in that, The control method is applied to the intelligent hydraulic air conditioning system of the insulated bucket truck as described in any one of claims 1 to 8, and the control method includes: The operating parameters of the insulated bucket truck's internal environment, hydraulic generator (1), and air conditioning components (2) were collected; The collected operating parameters are parsed and processed; Based on the changes in the analyzed operating parameters, differentiated control signals are generated; Based on the differentiated control signal, the hydraulic oil flow rate of the first oil outlet passage (43) and the hydraulic oil flow rate of the second oil outlet passage (44) are independently adjusted respectively.

10. The control method according to claim 9, characterized in that, Based on the changes in the analyzed operating parameters, differentiated control signals are generated, including: From the analyzed operating parameters, extract the ambient temperature and humidity parameters inside the bucket, the output load parameters of the hydraulic generator (1), and the refrigerant pressure parameters of the air conditioning component (2); The environmental temperature and humidity parameters are compared with the pre-stored target temperature and humidity thresholds; Based on the comparison results, the output load parameters of the hydraulic generator (1) and the refrigerant pressure parameters of the air conditioning component (2), a first sub-control signal corresponding to the first oil outlet passage (43) and a second sub-control signal corresponding to the second oil outlet passage (44) are generated respectively. The first sub-control signal is combined with the second sub-control signal to form the differentiated control signal.

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