Dynamic control method and device for air conditioning and refrigeration control system of refrigerated transport vehicle

Abstract

The application provides a dynamic control method and device for an air conditioner and a refrigeration machine control system of a refrigerated transport vehicle. The dynamic control method comprises determining whether a driving state of the refrigerated transport vehicle reaches a return difference temperature correction condition; in the case where the driving state of the refrigerated transport vehicle reaches the return difference temperature correction condition, correcting a return air temperature limit value of a unit of the air conditioner and the refrigeration machine control system to obtain a corrected limit value; and in the case where the return air temperature of the unit reaches the corrected limit value, controlling the opening and closing of the air conditioner and the refrigeration machine control system. In this way, whether to correct the return difference temperature limit value is determined according to the driving state of the refrigerated transport vehicle.

Description

Technical Field

[0001] This invention relates to the field of refrigerated transport vehicle control technology, and in particular to a dynamic control method and device for an air conditioning refrigeration unit control system of a refrigerated transport vehicle. Background Technology

[0002] The cold chain transportation control method of refrigerated transport vehicles is to control refrigeration, heating, (standby) and other functions based on the fixed hysteresis offset between the return air temperature and the set temperature.

[0003] The fuel system in refrigerated transport vehicles uses a fixed hysteresis offset between the return air temperature and the set temperature to control the unit's operation. However, this fixed hysteresis offset control remains inefficient and fails to save energy, even when the vehicle speed varies significantly. Summary of the Invention

[0004] This application provides a dynamic control method and device for the air conditioning refrigeration unit control system of a refrigerated transport vehicle, which is more conducive to improving fuel efficiency and thus saving energy.

[0005] This application provides a dynamic control method for the air conditioning refrigeration unit control system of a refrigerated transport vehicle, including:

[0006] Determine whether the refrigerated transport vehicle's driving status meets the hysteresis temperature correction conditions;

[0007] When the refrigerated transport vehicle reaches the hysteresis temperature correction condition, the return air temperature limit of the air conditioning chiller control system is corrected to obtain the corrected limit value.

[0008] When the return air temperature of the unit reaches the corrected limit value, the opening and closing of the air conditioning chiller control system is controlled.

[0009] Furthermore, the driving status of the refrigerated transport vehicle includes the current vehicle acceleration;

[0010] Determining whether the driving status of the refrigerated transport vehicle meets the hysteresis temperature correction condition includes:

[0011] Determine the current vehicle speed of the refrigerated transport vehicle; determine the current vehicle acceleration based on the current vehicle speed; determine whether the current vehicle acceleration meets the hysteresis temperature correction condition.

[0012] Furthermore, when the refrigerated transport vehicle's driving status reaches the hysteresis temperature correction condition, correcting the return air temperature limit of the air conditioning chiller control system to obtain the corrected limit includes:

[0013] When the current vehicle acceleration is within the acceleration range, the upper limit of the return air temperature limit is increased to obtain a corrected upper limit. The corrected upper limit is used to delay the start-up of the air conditioning chiller control system.

[0014] When the return air temperature of the unit reaches the corrected limit value, controlling the opening and closing of the air conditioning chiller control system includes:

[0015] When the return air temperature of the unit reaches the corrected upper limit value, the compressor clutch of the air conditioning chiller control system is controlled to engage.

[0016] Furthermore, when the refrigerated transport vehicle's driving status reaches the hysteresis temperature correction condition, correcting the return air temperature limit of the air conditioning chiller control system to obtain the corrected limit includes:

[0017] When the current vehicle acceleration is within the deceleration range, the lower limit of the return air temperature limit is reduced to obtain a corrected lower limit. The corrected lower limit is used to store cold for the air conditioning chiller control system.

[0018] When the return air temperature of the unit reaches the corrected limit value, controlling the opening and closing of the air conditioning chiller control system includes:

[0019] When the return air temperature of the unit reaches the corrected lower limit, the compressor clutch of the air conditioning chiller control system is disengaged.

[0020] Furthermore, the driving status of the refrigerated transport vehicle includes the current vehicle acceleration;

[0021] Determining whether the driving status of the refrigerated transport vehicle meets the hysteresis temperature correction condition includes:

[0022] Determine the current vehicle speed of the refrigerated transport vehicle; determine whether the change in the current vehicle speed meets the hysteresis temperature correction condition.

[0023] Furthermore, when the refrigerated transport vehicle's driving status reaches the hysteresis temperature correction condition, correcting the return air temperature limit of the air conditioning chiller control system to obtain the corrected limit includes:

[0024] When the current vehicle speed increases, the upper limit of the return air temperature limit is increased to obtain a corrected upper limit. The corrected upper limit is used to delay the start-up of the air conditioning chiller control system.

[0025] When the return air temperature of the unit reaches the corrected limit value, controlling the opening and closing of the air conditioning chiller control system includes:

[0026] When the return air temperature of the unit reaches the corrected upper limit value, the compressor clutch of the air conditioning chiller control system is controlled to engage.

[0027] Furthermore, when the refrigerated transport vehicle's driving status reaches the hysteresis temperature correction condition, correcting the return air temperature limit of the air conditioning chiller control system to obtain the corrected limit includes:

[0028] When the current vehicle speed decreases, the lower limit of the return air temperature limit is reduced to obtain a corrected lower limit. The corrected lower limit is used to store cold for the air conditioning chiller control system.

[0029] When the return air temperature of the unit reaches the corrected limit value, controlling the opening and closing of the air conditioning chiller control system includes:

[0030] When the return air temperature of the unit reaches the corrected lower limit, the compressor clutch of the air conditioning chiller control system is disengaged.

[0031] Furthermore, determining the current speed of the refrigerated transport vehicle includes:

[0032] The current vehicle speed is obtained through a GPS remote monitoring system.

[0033] Furthermore, the driving status of the refrigerated transport vehicle includes the current vehicle acceleration;

[0034] The method further includes:

[0035] Based on the current vehicle acceleration, the current correction step of the electronic expansion valve corresponding to the current vehicle acceleration is determined from the pre-established correspondence between the correction step of the electronic expansion valve and the current vehicle acceleration.

[0036] The number of steps for adjusting the electronic expansion valve is adjusted based on the current correction step number and the return air temperature of the unit.

[0037] This application provides a dynamic control device for the air conditioning refrigeration unit control system of a refrigerated transport vehicle, the device comprising:

[0038] The module for determining hysteresis temperature correction conditions is used to determine whether the driving status of the refrigerated transport vehicle meets the hysteresis temperature correction conditions.

[0039] The return air temperature limit correction module is used to correct the return air temperature limit of the air conditioning chiller control system unit when the driving status of the refrigerated transport vehicle reaches the return temperature correction condition, so as to obtain the corrected limit value.

[0040] The start-up and shut-down control module of the air conditioning chiller control system is used to control the start-up and shut-down of the air conditioning chiller control system when the return air temperature of the unit reaches the corrected limit value.

[0041] This application provides a computer-readable storage medium having a program stored thereon that, when executed by a processor, implements the method described in any of the preceding claims.

[0042] In some embodiments, the dynamic control method of the air conditioning refrigeration unit control system of the refrigerated transport vehicle of this application determines whether the driving state of the refrigerated transport vehicle meets the hysteresis temperature correction condition; if the driving state of the refrigerated transport vehicle meets the hysteresis temperature correction condition, the return air temperature limit value of the unit of the air conditioning refrigeration unit control system is corrected to obtain the corrected limit value; if the return air temperature of the unit reaches the corrected limit value, the opening and closing of the air conditioning refrigeration unit control system is controlled. Thus, the need to correct the hysteresis temperature limit value is determined by the driving state of the refrigerated transport vehicle. This allows the unit's operation to be controlled according to the driving state of the refrigerated transport vehicle, which is more in line with the actual working scenario of the engine and compressor, and is more conducive to improving fuel efficiency, thereby saving energy. Attached Figure Description

[0043] Figure 1 The diagram shown is a flowchart illustrating the dynamic control method of the air conditioning refrigeration unit control system of a refrigerated transport vehicle according to an embodiment of this application.

[0044] Figure 2a As shown Figure 1 The diagram shows the detailed flow chart of step 110 of the dynamic control method of the air conditioning refrigeration unit control system of the refrigerated transport vehicle.

[0045] Figure 2b As shown Figure 1 The diagram shows the structure of the air conditioning refrigeration unit control system and the GPS (remote monitoring system) of the refrigerated transport vehicle.

[0046] Figure 3 As shown Figure 2a The diagram shows the detailed flow chart of steps 120 and 130 of the dynamic control method for the air conditioning refrigeration unit control system of the refrigerated transport vehicle.

[0047] Figure 4 As shown Figure 2a The diagram shows the upper limit of the return air temperature in the dynamic control method of the air conditioning refrigeration unit control system of the refrigerated transport vehicle.

[0048] Figure 5 As shown Figure 2a The diagram shows the detailed flow chart of steps 120 and 130 of the dynamic control method for the air conditioning refrigeration unit control system of the refrigerated transport vehicle.

[0049] Figure 6 As shown Figure 2a The diagram shows a flow chart of the return air temperature lower limit of the dynamic control method of the air conditioning refrigeration unit control system of the refrigerated transport vehicle.

[0050] Figure 7 As shown Figure 1 Another specific flowchart illustrating the dynamic control method of the air conditioning refrigeration unit control system of the refrigerated transport vehicle is shown.

[0051] Figure 8 The diagram shown is a schematic diagram of the dynamic control device of the air conditioning refrigeration unit control system of the refrigerated transport vehicle provided in the embodiment of this application;

[0052] Figure 9 The diagram shown is a block diagram of the dynamic control system of the air conditioning refrigeration unit control system of the refrigerated transport vehicle provided in the embodiment of this application. Detailed Implementation

[0053] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with one or more embodiments of this specification. Rather, they are merely examples of apparatuses and methods consistent with some aspects of one or more embodiments of this specification as detailed in the appended claims.

[0054] It should be noted that the steps of the corresponding methods are not necessarily performed in the order shown and described in this specification in other embodiments. In some other embodiments, the methods may include more or fewer steps than described in this specification. Furthermore, a single step described in this specification may be broken down into multiple steps in other embodiments; and multiple steps described in this specification may be combined into a single step in other embodiments.

[0055] To address the aforementioned technical problems of low fuel efficiency and lack of energy conservation, this application provides a dynamic control method for the air conditioning refrigeration unit control system of a refrigerated transport vehicle. The method determines whether the refrigerated transport vehicle's driving status meets the hysteresis temperature correction condition. If the hysteresis temperature correction condition is met, the return air temperature limit of the air conditioning refrigeration unit control system is corrected to obtain the corrected limit value. When the return air temperature of the unit reaches the corrected limit value, the opening and closing of the air conditioning refrigeration unit control system is controlled. Thus, the need to correct the hysteresis temperature limit value is determined based on the refrigerated transport vehicle's driving status. This allows for control of the unit's operation according to the refrigerated transport vehicle's driving status, better reflecting the actual operating scenarios of the engine and compressor, and thus improving fuel efficiency and saving energy.

[0056] The dynamic control method of the air conditioning refrigeration unit control system of the refrigerated transport vehicle in this application embodiment is applied to the refrigerated transport vehicle.

[0057] Figure 1 The diagram shown is a flowchart illustrating the dynamic control method of the air conditioning refrigeration unit control system of a refrigerated transport vehicle according to an embodiment of this application.

[0058] like Figure 1 As shown, the dynamic control method of the air conditioning refrigeration unit control system of the refrigerated transport vehicle includes the following steps 110 to 130:

[0059] Step 110: Determine whether the driving status of the refrigerated transport vehicle meets the hysteresis temperature correction conditions.

[0060] The driving status of a refrigerated transport vehicle is used to reflect its speed.

[0061] Step 120: When the refrigerated transport vehicle's driving status reaches the hysteresis temperature correction condition, correct the return air temperature limit of the air conditioning chiller control system to obtain the corrected limit value.

[0062] The return air temperature limit value of the air conditioning chiller control system reflects the initial return air temperature reached by the air conditioning unit (also known as the chiller) under the control system. The revised limit value reflects the maximum return air temperature ultimately reached by the air conditioning chiller control system.

[0063] In some embodiments, the return air temperature limit of the air conditioning chiller control system includes an upper limit value for the return air temperature of the unit. In this case, when the return air temperature is initially reached, the clutch of the air conditioning chiller control system can disengage and stop the unit. Correspondingly, the modified limit value described above may be, but is not limited to, the modified upper limit value. See the following for a detailed explanation. Figure 4 As shown.

[0064] In some embodiments, the return air temperature limit of the unit in the air conditioning chiller control system includes the lower limit of the return air temperature of the unit in the air conditioning chiller control system. In this case, when the return air temperature is initially reached, the clutch of the air conditioning chiller control system remains engaged to store energy. Correspondingly, the modified limit value described above may, but is not limited to, the modified lower limit value. See the following for a detailed explanation. Figure 6 As shown.

[0065] The method further includes controlling the current hysteresis temperature of the air conditioning chiller control system to change according to the actual situation when the refrigerated transport vehicle's driving condition does not meet the hysteresis temperature correction condition. If the current hysteresis temperature is increasing, it continues to increase; if the current hysteresis temperature is decreasing, it continues to decrease.

[0066] Step 130: When the return air temperature of the unit reaches the corrected limit value, control the opening and closing of the air conditioning chiller control system.

[0067] Figure 2a As shown Figure 1 The diagram shows the detailed process flow of step 110 of the dynamic control method for the air conditioning refrigeration unit control system of the refrigerated transport vehicle.

[0068] like Figure 2a The embodiment of step 110 shown may include, but is not limited to, the following steps 111a to 113a:

[0069] Step 111a: Determine the current speed of the refrigerated transport vehicle.

[0070] Figure 2b As shown Figure 1 The diagram shows the structure of the air conditioning refrigeration unit control system 22 and the GPS (Global Positioning System) remote monitoring system 21 of the refrigerated transport vehicle.

[0071] like Figure 2bAs shown, the air conditioning refrigeration control system 22 of the refrigerated transport vehicle is connected to both the GPS remote monitoring system 21 and the display control panel 23 of the air conditioning refrigeration control system 22. The air conditioning refrigeration control system 22 communicates with the GPS remote monitoring system 21 via a CAN (Controller Area Network) communication port to collect the GPS speed value of the refrigerated transport vehicle. The air conditioning refrigeration control system 22 may include, but is not limited to, an ECU (Electronic Control Unit) or an HMI (Human Machine Interface). The air conditioning refrigeration control system 22 and / or the GPS remote monitoring system 21 are used to perform fitting calculations on the current vehicle acceleration of the refrigerated transport vehicle to control the temperature hysteresis of the unit.

[0072] In the embodiment of step 111a above, the current vehicle speed is obtained through the GPS remote monitoring system 21. Thus, without obtaining permission from the vehicle manufacturer, a GPS remote monitoring system 21 related to the air conditioning refrigeration control system 22 can be independently generated to independently communicate with the air conditioning refrigeration control system 22 to obtain the vehicle speed. In another embodiment of step 111 above, the current vehicle speed is obtained through the central control panel of the refrigerated truck.

[0073] Step 112a: Determine the current vehicle acceleration based on the current vehicle speed.

[0074] Based on the current vehicle speed, a fitting calculation can be performed to obtain the current vehicle acceleration. Where V1 is the vehicle speed at the previous moment, V2 is the vehicle speed at the current moment, and T is the time difference between the previous moment and the current moment.

[0075] Step 113a: Determine whether the current vehicle acceleration meets the hysteresis temperature correction condition. This allows for a more convenient acquisition of the current vehicle speed and enables a timely and faster determination of whether the current vehicle acceleration meets the hysteresis temperature correction condition.

[0076] The method also includes determining that if the current vehicle acceleration does not meet the hysteresis temperature correction condition, then the current hysteresis temperature of the unit controlling the air conditioning chiller control system changes according to the actual situation.

[0077] In another embodiment of step 110, the first step is to obtain the overall speed of the refrigerated transport vehicle; based on the overall speed, determine the current overall vehicle acceleration. Specifically, the ratio of overall vehicle speed to time is used as the overall vehicle acceleration. The second step is to determine the engine speed of the refrigerated transport vehicle based on the current overall vehicle acceleration. The third step is to determine whether the engine speed of the refrigerated transport vehicle meets the hysteresis temperature correction condition.

[0078] Figure 3 Shown as Figure 2a Specific process schematic diagrams of step 120 and step 130 of the dynamic control method of the air-conditioning chiller control system of the refrigerated transport vehicle shown

[0079] Combined with Figure 2a 、 Figure 2b and Figure 3 In the embodiment of step 120, in step 121a, when the current vehicle acceleration is within the acceleration range, increase the upper limit value of the return air temperature limit value to obtain a corrected upper limit value, and the corrected upper limit value is used to delay the startup of the air-conditioning chiller control system

[0080] The above-mentioned current vehicle acceleration is within the acceleration range, such as 0 < k ≤ a, which is used to illustrate that the refrigerated transport vehicle is in an accelerating operation state. Where k is the optimal value of experimental data

[0081] In the embodiment of step 121a above, use a fixed value to increase the upper limit value of the return air temperature limit value to obtain a corrected upper limit value. The fixed value is, for example, but not limited to, ΔT, and is not limited here. In some other embodiments of step 121a above, according to the adjustment value corresponding to the current vehicle acceleration, increase the upper limit value of the return air temperature limit value to obtain a corrected upper limit value. Among them, the value corresponding to the current vehicle acceleration is determined from the corresponding relationship between the vehicle acceleration and the adjustment value

[0082] Combined with Figure 2b and Figure 3 Shown, use the air-conditioning chiller control system 22 to collect the GPS speed value of the GPS remote monitoring system 21. The GPS remote monitoring system 21 is installed on the refrigerated transport vehicle and is communicatively connected to the air-conditioning chiller control system 22. Combined with the software logic, determine the change situation of the current vehicle acceleration a, such as acceleration or deceleration, to control the temperature dead band of the unit operation: when the refrigerated transport vehicle is in the accelerating operation state of 0 < k ≤ a, the engine speed increases rapidly, the refrigerating capacity of the compressor increases, and at this time, the corrected upper limit value can increase the upper limit value of the return air temperature limit value, delay the engagement of the clutch, thereby improving the fuel efficiency

[0083] Continue Figure 3 In the embodiment of step 130, in step 131a, when the return air temperature of the unit reaches the corrected upper limit value, control the compressor clutch of the air-conditioning chiller control system 22 to engage. When the return air temperature of the unit does not reach the corrected upper limit value, continue to maintain the compressor of the air-conditioning chiller control system 22 in the off state

[0084] In Figure 3In the illustrated embodiment, when the current vehicle acceleration is within the acceleration range, the engine operation duration is reduced, the use of the air conditioner chiller control system is minimized as much as possible, the load is reduced, and energy is saved.

[0085] Figure 4 As shown Figure 2a Schematic flow diagram of the upper limit value of the return air temperature of the dynamic control method of the air conditioner chiller control system of the refrigerated transport vehicle shown.

[0086] When 0 < k ≤ a, where k is the optimal value of the experimental data. The refrigerated transport vehicle is in an accelerating state, the engine speed is very high, which drives the compressor speed of the air conditioner chiller control system to increase, and the refrigeration capacity increases. Therefore, it is very easy to reach the set temperature T / T2, and the clutch disconnects and stops.

[0087] At this time, the upper limit value of the return air temperature limit value is automatically corrected to T1 + ΔT by the air conditioner chiller control system. Compared with the original upper limit value T1 of the return air temperature, after the clutch disconnects, the unit's return air temperature needs to reach T1 + ΔT before the clutch will engage and start. This reduces the vehicle load, thereby improving fuel efficiency and achieving the purpose of energy saving.

[0088] Figure 5 As shown Figure 2a Schematic flow diagram of the specific steps 120 and 130 of the dynamic control method of the air conditioner chiller control system of the refrigerated transport vehicle shown.

[0089] Combined with Figure 2a 、 Figure 2b and Figure 5 In the embodiment of step 120, in step 121b, when the current vehicle acceleration is within the deceleration range, the lower limit value of the return air temperature limit value is adjusted downward to obtain a corrected lower limit value, and the corrected lower limit value is used to store cold for the air conditioner chiller control system. In the above embodiment of step 121b, a fixed value is used to adjust the lower limit value of the return air temperature limit value downward to obtain a corrected lower limit value. The fixed value is, for example but not limited to, ΔT, and is not limited herein. In another embodiment of step 121b, the lower limit value of the return air temperature limit value is adjusted downward according to the adjustment value corresponding to the current vehicle acceleration. Among them, the adjustment value corresponding to the current vehicle acceleration is determined from the corresponding relationship between the vehicle acceleration and the adjustment value.

[0090] The above current vehicle acceleration is within the deceleration range, such as a ≤ m ≤ 0, which is used to illustrate that the refrigerated transport vehicle is in a decelerating state.

[0091] When a refrigerated transport vehicle is in a deceleration state (a≤m≤0), the engine speed decreases, the fuel efficiency of the combustion engine is higher, and the fuel in the combustion engine releases energy. At this time, lowering the lower limit of the return air temperature allows the cargo temperature to be even lower. This results in a longer temperature recovery time during subsequent refrigerated truck operation, reducing the subsequent engine operating time and improving fuel efficiency, thus achieving energy savings. This is particularly beneficial for applications with less stringent temperature control requirements or where refrigeration is a more economical option.

[0092] continue Figure 5 In the embodiment of step 130, step 131b involves disengaging the compressor clutch of the air conditioning chiller control system when the return air temperature of the unit reaches the corrected lower limit.

[0093] exist Figure 5 In the illustrated embodiment, when the current vehicle acceleration is within the deceleration range, the lower limit of the return air temperature is adjusted to store cold for the air conditioning refrigeration control system. Thus, when the current vehicle speed decreases, the overflow energy of the combustion engine fuel is used for cold storage, improving fuel efficiency and thereby saving energy.

[0094] Figure 6 As shown Figure 2a The diagram shows a flow chart of the return air temperature limit of the dynamic control method of the air conditioning refrigeration unit control system of the refrigerated transport vehicle.

[0095] like Figure 6 As shown, when a≤m≤0, where m is the optimal value of the experimental data. Refrigerated transport vehicles are in a deceleration state, with a relatively slow engine speed and generally high fuel efficiency. Under normal deceleration or downhill conditions, the combustion consumption of the fuel engine is high, and the engine speed is low. At this time, energy overflows and is wasted, unable to be converted. However, by storing energy here, only the excess energy consumed by the fuel engine is consumed. In subsequent processes, extending the recovery time of the return air temperature prolongs the cooling effect, thus saving energy.

[0096] At this point, the air conditioning chiller control system automatically adjusts the lower limit of the return air temperature to T2-ΔT. Compared to the original lower limit of T2, the unit needs to operate until T2-ΔT before the compressor clutch disengages, resulting in a lower cargo temperature. This means that the temperature recovery time is longer during subsequent refrigerated transport vehicle operation, thus reducing the subsequent operating time. This reduces the vehicle load, thereby improving fuel efficiency and achieving energy savings.

[0097] In some embodiments, the driving status of the refrigerated transport vehicle includes the current vehicle acceleration; the method further includes the following two steps. The first step is to determine the current correction step number of the electronic expansion valve corresponding to the current vehicle acceleration, based on a pre-established correspondence between the correction step number of the electronic expansion valve and the current vehicle acceleration. The second step is to adjust the step number of the electronic expansion valve based on the current correction step number and the return air temperature of the unit. Thus, the current vehicle acceleration serves as an auxiliary control parameter for the evaporative electronic expansion valve to achieve energy saving and emission reduction.

[0098] The pre-established relationship between the correction steps of the electronic expansion valve and the current vehicle acceleration can be the current vehicle acceleration and the compressor speed. The opening degree of the electronic expansion valve can be obtained through experiments. As long as it is qualitatively guaranteed to be consistent with the changing trend of the air conditioning refrigeration control system, a good control effect can be obtained.

[0099] Compared to related technologies, where electronic expansion valves in VP (Vehicle Premise) refrigerated trucks cannot confirm compressor speed, leading to abrupt changes in electronic expansion valve control, this embodiment uses the current vehicle acceleration as an auxiliary control parameter to ensure the control accuracy of the electronic expansion valve. Upon obtaining the current vehicle acceleration, a virtual superheat is applied to the EEV (Enhanced Environmentally Friendly Vehicle) to ensure the linkage and interaction between compressor speed and EEV opening control. This matches the flow rate of the air conditioning chiller control system with the compressor input power, ensuring the control accuracy of the electronic expansion valve and improving system reliability and stability. Furthermore, it improves the energy efficiency and temperature control accuracy of the VP unit, further enhancing energy savings.

[0100] Figure 7 As shown Figure 1 Another specific flowchart illustrating the dynamic control method of the air conditioning refrigeration unit control system of the refrigerated transport vehicle.

[0101] Figure 7 The implementation example is similar to Figures 1 to 6 The illustrated embodiment, compared to Figures 1 to 6 The illustrated embodiment, in Figure 7 In this embodiment, the driving status of the refrigerated transport vehicle includes the current vehicle acceleration; step 110 may include, but is not limited to, step 111b, determining the current vehicle speed of the refrigerated transport vehicle. Step 112b determines whether the change in the current vehicle speed meets the hysteresis temperature correction condition. This allows for a more convenient acquisition of the current vehicle speed and enables timely and faster determination of whether the change in the current vehicle speed meets the hysteresis temperature correction condition.

[0102] Continue as Figure 7 Step 120 shown may further include step 121c, where, given the increased vehicle speed, the upper limit of the return air temperature limit is increased to obtain a corrected upper limit. This corrected upper limit is used to delay the activation of the air conditioning chiller control system. The method for determining "increase" in this step is similar to... Figure 6 The process for determining the "adjustment" in step 121a above is the same and can be referred to in the process described above; it will not be repeated here. Step 130 may further include step 131c, which involves controlling the compressor clutch of the air conditioning chiller control system to engage when the return air temperature of the unit reaches the corrected upper limit value. In this way, when the vehicle speed increases, the engine operating time is reduced, minimizing the use of the air conditioning chiller control system, reducing the load, and saving energy.

[0103] Continue as Figure 7 Step 120 shown may further include step 121d, which, when the current vehicle speed decreases, reduces the lower limit of the return air temperature limit to obtain a corrected lower limit. This corrected lower limit is used to store cold for the air conditioning chiller control system. The method for determining "reducing" in this step is similar to... Figure 6 The process for determining the "reduction" in step 121b above is the same and can be referred to in the process described above; it will not be repeated here. Step 130 may further include step 131d, whereby, when the return air temperature of the unit reaches the corrected lower limit, the compressor clutch of the air conditioning chiller control system is disengaged. Thus, when the current vehicle speed decreases, the lower limit of the return air temperature is corrected, allowing the air conditioning chiller control system to store cold. This storage can utilize the overflow energy of the fuel from the combustion engine, improving fuel efficiency and thus saving energy.

[0104] Figure 8 The diagram shown is a schematic diagram of the dynamic control device of the air conditioning refrigeration unit control system of the refrigerated transport vehicle provided in the embodiment of this application.

[0105] like Figure 8 As shown, the dynamic control device of the air conditioning refrigeration unit control system of the refrigerated transport vehicle includes the following modules:

[0106] The hysteresis temperature correction condition determination module 31 is used to determine whether the driving status of the refrigerated transport vehicle meets the hysteresis temperature correction condition.

[0107] The return air temperature limit correction module 32 is used to correct the return air temperature limit of the air conditioning chiller control system unit when the driving status of the refrigerated transport vehicle reaches the return temperature correction condition, and obtain the corrected limit value.

[0108] The start-stop control module 33 of the air conditioning chiller control system is used to control the start-stop of the air conditioning chiller control system when the return air temperature of the unit reaches the corrected limit value.

[0109] In some embodiments, the driving status of the refrigerated transport vehicle includes the current vehicle acceleration;

[0110] The module for determining hysteresis temperature correction conditions includes:

[0111] The current vehicle speed determination submodule is used to determine the current vehicle speed of the refrigerated transport vehicle;

[0112] The current vehicle acceleration determination submodule is used to determine the current vehicle acceleration based on the current vehicle speed.

[0113] The hysteresis temperature correction condition determination submodule is used to determine whether the current vehicle acceleration has reached the hysteresis temperature correction condition.

[0114] In some embodiments, the return air temperature limit correction module is specifically used for:

[0115] With the current vehicle acceleration within the acceleration range, the upper limit of the return air temperature limit is increased to obtain the corrected upper limit. The corrected upper limit is used to delay the start-up of the air conditioning cooling unit control system.

[0116] The start-stop control module of the air conditioning chiller control system is specifically used for:

[0117] When the return air temperature of the unit reaches the corrected upper limit, the compressor clutch of the air conditioning chiller control system is engaged.

[0118] In some embodiments, the return air temperature limit correction module is specifically used for:

[0119] With the current vehicle acceleration within the deceleration range, the lower limit of the return air temperature limit is reduced to obtain the corrected lower limit. The corrected lower limit is used to store cold for the air conditioning chiller control system.

[0120] The start-stop control module of the air conditioning chiller control system is specifically used for:

[0121] When the return air temperature of the unit reaches the corrected lower limit, the compressor clutch of the air conditioning chiller control system is disengaged.

[0122] In some embodiments, the driving status of the refrigerated transport vehicle includes the current vehicle acceleration;

[0123] The module for determining hysteresis temperature correction conditions is specifically used for:

[0124] Determine the current vehicle speed of the refrigerated transport vehicle; determine whether the change in the current vehicle speed meets the hysteresis temperature correction condition.

[0125] In some embodiments, the return air temperature limit correction module is specifically used for:

[0126] With the vehicle speed increasing, the upper limit of the return air temperature limit is increased to obtain the corrected upper limit. The corrected upper limit is used to delay the start-up of the air conditioning cooling unit control system.

[0127] The start-stop control module of the air conditioning chiller control system is specifically used for:

[0128] When the return air temperature of the unit reaches the corrected upper limit, the compressor clutch of the air conditioning chiller control system is engaged.

[0129] In some embodiments, the return air temperature limit correction module is specifically used for:

[0130] With the current vehicle speed decreasing, the lower limit of the return air temperature limit is reduced to obtain the corrected lower limit. The corrected lower limit is used to store cold for the air conditioning chiller control system.

[0131] The start-stop control module of the air conditioning chiller control system is specifically used for:

[0132] When the return air temperature of the unit reaches the corrected lower limit, the compressor clutch of the air conditioning chiller control system is disengaged.

[0133] In some embodiments, determining the current overall speed of the refrigerated transport vehicle includes:

[0134] The current vehicle speed is obtained through a GPS remote monitoring system.

[0135] In some embodiments, the driving status of the refrigerated transport vehicle includes the current vehicle acceleration;

[0136] The device also includes: a current correction step determination module for the electronic expansion valve, used to determine the current correction step of the electronic expansion valve corresponding to the current vehicle acceleration based on the current vehicle acceleration and from a pre-established correspondence between the correction step of the electronic expansion valve and the current vehicle acceleration;

[0137] The step adjustment module for the electronic expansion valve is used to adjust the step count of the electronic expansion valve based on the current correction step count and the return air temperature of the unit.

[0138] The specific implementation process of the functions and roles of each module in the above device can be found in the implementation process of the corresponding steps in the above method, and will not be repeated here.

[0139] Figure 9The diagram shown is a block diagram of the dynamic control system 40 of the air conditioning refrigeration unit control system of the refrigerated transport vehicle provided in this embodiment of the application.

[0140] like Figure 9 As shown, the dynamic control system 40 of the air conditioning refrigeration unit control system of the refrigerated transport vehicle includes one or more processors 41 for implementing the dynamic control method of the air conditioning refrigeration unit control system of the refrigerated transport vehicle as described above.

[0141] In some embodiments, the dynamic control system 40 of the air conditioning refrigeration unit control system of the refrigerated transport vehicle may include a computer-readable storage medium 49, which may store a program that can be called by a processor 41, and may include a non-volatile storage medium. In some embodiments, the dynamic control system 40 of the air conditioning refrigeration unit control system of the refrigerated transport vehicle may include a memory 48 and an interface 47. In some embodiments, the dynamic control system 40 of the air conditioning refrigeration unit control system of the refrigerated transport vehicle may also include other hardware depending on the actual application.

[0142] The computer-readable storage medium 49 of this application embodiment stores a program that, when executed by the processor 41, is used to implement the dynamic control method of the air conditioning refrigeration unit control system of the refrigerated transport vehicle as described above.

[0143] This application may take the form of a computer program product implemented on one or more computer-readable storage media 49 (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing program code. The computer-readable storage media 49 includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented using any method or technology. The information may be computer-readable instructions, data structures, program modules, or other data. Examples of computer-readable storage media 49 include, but are not limited to: phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0144] The above are merely preferred embodiments of this specification and are not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification shall be included within the scope of protection of this specification.

[0145] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Without further limitations, an element qualified by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

Claims

1. A dynamic control method for the air conditioning refrigeration unit control system of a refrigerated transport vehicle, characterized in that, include: Determine whether the refrigerated transport vehicle's driving status meets the hysteresis temperature correction conditions; The driving status of the refrigerated transport vehicle includes the current vehicle acceleration or the current vehicle speed. Determine whether the current vehicle acceleration or the current vehicle speed meets the hysteresis temperature correction condition; When the refrigerated transport vehicle reaches the hysteresis temperature correction condition, the return air temperature limit of the air conditioning chiller control system is corrected to obtain the corrected limit value. When the current vehicle acceleration is within the acceleration range, or when the current vehicle speed increases, the upper limit of the return air temperature limit is increased to obtain a corrected upper limit. The corrected upper limit is used to delay the start-up of the air conditioning chiller control system. When the current vehicle acceleration is within the deceleration range, or when the current vehicle speed decreases, the lower limit of the return air temperature limit is reduced to obtain a corrected lower limit. The corrected lower limit is used to store cold for the air conditioning chiller control system. When the return air temperature of the unit reaches the corrected limit value, the opening and closing of the air conditioning chiller control system is controlled; when the return air temperature of the unit reaches the corrected upper limit value, the compressor clutch of the air conditioning chiller control system is controlled to engage; when the return air temperature of the unit reaches the corrected lower limit value, the compressor clutch of the air conditioning chiller control system is controlled to disengage.

2. The dynamic control method for the air conditioning refrigeration unit control system of a refrigerated transport vehicle as described in claim 1, characterized in that, Determine the current vehicle speed of the refrigerated transport vehicle, including the air conditioning refrigeration unit control system of the refrigerated transport vehicle: The current vehicle speed is obtained through a GPS remote monitoring system.

3. The dynamic control method for the air conditioning refrigeration unit control system of a refrigerated transport vehicle as described in claim 1, characterized in that, The driving status of the refrigerated transport vehicle includes the current vehicle acceleration; The method further includes: Based on the current vehicle acceleration, the current correction step of the electronic expansion valve corresponding to the current vehicle acceleration is determined from the pre-established correspondence between the correction step of the electronic expansion valve and the current vehicle acceleration. The number of steps for adjusting the electronic expansion valve is adjusted based on the current correction step number and the return air temperature of the unit.

4. A dynamic control device for the air conditioning refrigeration unit control system of a refrigerated transport vehicle, characterized in that, The device includes: The hysteresis temperature correction condition determination module is used to determine whether the driving status of the refrigerated transport vehicle meets the hysteresis temperature correction condition; the driving status of the refrigerated transport vehicle includes the current vehicle acceleration or the current vehicle speed; specifically, it is used to determine whether the current vehicle acceleration or the current vehicle speed meets the hysteresis temperature correction condition. The return air temperature limit correction module is used to correct the return air temperature limit of the air conditioning chiller control system when the driving state of the refrigerated transport vehicle reaches the return temperature correction condition, and obtain the corrected limit value; specifically, it is used to increase the upper limit of the return air temperature limit when the current vehicle acceleration is within the acceleration range, or when the current vehicle speed increases, and obtain the corrected upper limit value, which is used to delay the start-up of the air conditioning chiller control system. Specifically, when the current vehicle acceleration is within the deceleration range, or when the current vehicle speed decreases, the lower limit of the return air temperature limit is reduced to obtain a corrected lower limit. The corrected lower limit is used to store cold for the air conditioning chiller control system. The start-up and shut-down control module of the air conditioning chiller control system is used to control the start-up and shut-down of the air conditioning chiller control system when the return air temperature of the unit reaches the corrected limit value; specifically, it is used to control the compressor clutch of the air conditioning chiller control system to engage when the return air temperature of the unit reaches the corrected upper limit value; and to control the compressor clutch of the air conditioning chiller control system to disengage when the return air temperature of the unit reaches the corrected lower limit value.

5. A computer-readable storage medium, characterized in that, It stores a program that, when executed by a processor, implements the dynamic control method of the air conditioning refrigeration unit control system of the refrigerated transport vehicle as described in any one of claims 1-3.

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