Shutdown control method, device and equipment for vehicle heat recovery equipment and medium

Abstract

The invention discloses a shutdown control method, device and equipment for vehicle heat recovery equipment and a medium. The shutdown control method comprises the following steps: acquiring a shutdown instruction; the opening degree of a third A outlet valve is controlled to be reduced, the opening degree of a third B outlet valve is controlled to be increased, and the rotating speed of a working medium pump is reduced until second outlet side gas pressure information meets a first preset range and gas temperature information meets a second preset range; the opening degree of a fourth A outlet valve is controlled to be reduced, the opening degree of a fourth B outlet valve is increased until the second outlet side gas pressure information meets the first preset range, and the opening degree of the fourth A outlet valve is reduced to the minimum value; the opening degree of a third A outlet valve is controlled to be reduced, the opening degree of a third B outlet valve is controlled to be increased until the opening degree of the third A outlet valve is reduced to the minimum value and the opening degree of the third B outlet valve is increased to the maximum value; the opening degree of a fourth second outlet valve is controlled to be increased to the maximum value; and controlling the working medium pump and the condenser motor to stop. And the utilization rate of waste heat is increased.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a shutdown control method, device, equipment and medium for vehicle heat recovery equipment. Background Art

[0002] The vehicle's engine will generate a large amount of waste heat during operation. In order to effectively utilize the waste heat, a heat recovery device will be installed in the vehicle.

[0003] The existing control of heat recovery equipment mainly focuses on its operation process, while the shutdown control of heat recovery equipment is relatively simple. After the engine stops working, it will directly control the various devices in the heat recovery equipment to stop working at the same time. It does not consider the negative impact brought about by the simultaneous cessation of work of various devices in the heat recovery equipment, for example, some waste heat is not fully utilized, and some waste heat is discharged without being cooled. Summary of the invention

[0004] The present invention provides a shutdown control method, device, equipment and medium for vehicle heat recovery equipment to solve the problems that part of the waste heat is not fully utilized and part of the waste heat is discharged without being cooled in the shutdown control method of the existing heat recovery equipment.

[0005] In a first aspect, an embodiment of the present invention provides a shutdown control method for a vehicle heat recovery device, the vehicle heat recovery device comprising an engine, an exhaust heat exchanger, an expander, a condenser, a liquid storage tank, a working fluid pump, an exhaust valve and an expander valve, the exhaust heat exchanger comprising a first inlet, a first outlet, a second inlet and a second outlet, the first inlet and the first outlet are connected, the second inlet and the second outlet are connected, the exhaust valve comprises a third inlet, a third A outlet and a third B outlet, the expander valve comprises a fourth inlet, a fourth A outlet and a fourth B outlet, the third inlet is connected to the exhaust port of the engine, the third A outlet is connected to the first inlet, the third B outlet and the first outlet are both connected to external air, the outlet of the liquid storage tank is connected to the inlet of the working fluid pump, the outlet of the working fluid pump is connected to the second inlet, the second outlet is connected to the fourth inlet, the fourth A outlet is connected to the inlet of the expander, the outlet of the expander and the fourth B outlet are both connected to the inlet of the condenser, and the outlet of the condenser is connected to the inlet of the liquid storage tank, the shutdown control method comprises:

[0006] Get shutdown instructions;

[0007] According to the shutdown instruction, the valve opening of the third outlet A is controlled to decrease, the valve opening of the third outlet B is controlled to increase, and the speed of the working fluid pump is controlled to decrease until the gas pressure information on the second outlet side meets the first preset range and the gas temperature information meets the second preset range;

[0008] Controlling the valve opening of the fourth outlet A to decrease, and controlling the valve opening of the fourth outlet B to increase, until the gas pressure information on the second outlet side meets the first preset range, and the valve opening of the fourth outlet A decreases to a minimum value;

[0009] Controlling the valve opening of the third outlet A to decrease, and controlling the valve opening of the third outlet B to increase, until the valve opening of the third outlet A decreases to a minimum value, and the valve opening of the third outlet B increases to a maximum value;

[0010] Controlling the valve opening of the fourth B outlet to increase until the valve opening of the fourth B outlet increases to a maximum value;

[0011] Control the motors of the working fluid pump and the condenser to stop.

[0012] Optionally, obtain shutdown instructions, including:

[0013] Acquiring exhaust gas temperature information at the exhaust port side of the engine;

[0014] The shutdown instruction is generated according to the exhaust temperature information.

[0015] Optionally, generating the shutdown instruction according to the exhaust temperature information includes:

[0016] If the exhaust temperature information is less than a preset temperature threshold and the duration is greater than a preset time threshold, a shutdown instruction is generated.

[0017] Optionally, controlling the motors of the working fluid pump and the condenser to stop includes:

[0018] The working fluid pump is controlled to stop, and the motor of the condenser is controlled to stop after a second preset time.

[0019] Optionally, controlling the working fluid pump to stop includes:

[0020] Controlling the speed of the working fluid pump to decrease to a preset speed;

[0021] After controlling the working fluid pump to rotate at the preset speed for a first preset time, the speed of the working fluid pump is controlled to be zero.

[0022] Optionally, after controlling the working fluid pump and the condenser to shut down, the shutdown control method further includes:

[0023] Obtaining valve opening information of the third outlet A, valve opening information of the third outlet B, valve opening information of the fourth outlet A, valve opening information of the fourth outlet B, rotation speed of the working fluid pump and rotation speed of the motor of the condenser;

[0024] Whether the vehicle heat recovery device is successfully shut down is determined based on the valve opening information of the third A outlet, the valve opening information of the third B outlet, the valve opening information of the fourth A outlet, the valve opening information of the fourth B outlet, the rotation speed of the working fluid pump and the rotation speed of the motor of the condenser.

[0025] Optionally, before obtaining the shutdown instruction, the shutdown control method further includes:

[0026] Sending a self-check instruction to the condenser, the working fluid pump, the exhaust valve and the expander valve;

[0027] Obtaining self-test information fed back by the condenser, the working fluid pump, the exhaust valve and the expander valve;

[0028] Fault information of the condenser, the working fluid pump, the exhaust valve and the expander valve is determined according to the self-check information.

[0029] In a second aspect, an embodiment of the present invention provides a shutdown control device for a vehicle heat recovery device, which is used to execute the shutdown control method as described in the first aspect, and the shutdown control device includes:

[0030] A shutdown instruction acquisition unit, used for acquiring a shutdown instruction;

[0031] a first control unit, configured to control the valve opening of the third outlet A to decrease, control the valve opening of the third outlet B to increase, and control the speed of the working fluid pump to decrease according to the shutdown instruction, until the gas pressure information on the second outlet side meets a preset range, and the gas temperature information meets a preset range;

[0032] a second control unit, configured to control the valve opening of the fourth outlet A to decrease, and control the valve opening of the fourth outlet B to increase, until the gas pressure information at the second outlet side meets a preset range, and the valve opening of the fourth outlet A decreases to a minimum value;

[0033] A third control unit is used to control the valve opening of the third outlet A to decrease, and control the valve opening of the third outlet B to increase, until the valve opening of the third outlet A decreases to a minimum value, and the valve opening of the third outlet B increases to a maximum value;

[0034] A fourth control unit, used for increasing the valve opening of the fourth B outlet until the valve opening of the fourth B outlet increases to a maximum value;

[0035] A fifth control unit is used to control the working fluid pump and the condenser to shut down.

[0036] In a third aspect, an embodiment of the present invention provides a shutdown control device, the shutdown control device comprising:

[0037] one or more processors;

[0038] a storage device for storing one or more programs,

[0039] When the one or more programs are executed by the one or more processors, the one or more processors implement the shutdown control method as described in the first aspect.

[0040] In a fourth aspect, an embodiment of the present invention provides a storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the shutdown control method as described in the first aspect.

[0041] The technical solution of the embodiment of the present invention is to set a shutdown control method for vehicle heat recovery equipment, first according to the shutdown instruction, control the valve opening of the third A outlet to decrease, the valve opening of the third B outlet to increase, and the speed of the working fluid pump to decrease until the gas pressure information on the second outlet side meets the first preset range and the gas temperature information meets the second preset range, then control the valve opening of the fourth A outlet to decrease and the valve opening of the fourth B outlet to increase until the gas pressure information on the second outlet side meets the first preset range and the valve opening of the fourth A outlet is reduced to a minimum value, then control the valve opening of the third A outlet to decrease and the valve opening of the third B outlet to increase until the valve opening of the third A outlet is reduced to a minimum value and the valve opening of the third B outlet is increased to a maximum value, then control the valve opening of the fourth B outlet to increase until the valve opening of the fourth B outlet is increased to a maximum value, and finally control the motor of the working fluid pump and the condenser to stop. The shutdown control method of the existing heat recovery equipment solves the problem that part of the waste heat is not fully utilized and part of the waste heat is discharged without being cooled, which is conducive to improving the utilization rate of the waste heat during the shutdown process and realizing the complete cooling of the waste heat entering the exhaust heat exchanger.

[0042] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1A schematic structural diagram of a vehicle heat recovery device provided by an embodiment of the present invention;

[0045] Figure 2 A flowchart of a shutdown control method of a vehicle heat recovery device provided by an embodiment of the present invention;

[0046] Figure 3 A flowchart of another shutdown control method of a vehicle heat recovery device provided by an embodiment of the present invention;

[0047] Figure 4 A flowchart of another shutdown control method of a vehicle heat recovery device provided by an embodiment of the present invention;

[0048] Figure 5 A flowchart of another shutdown control method of a vehicle heat recovery device provided by an embodiment of the present invention;

[0049] Figure 6 A flowchart of another shutdown control method of a vehicle heat recovery device provided by an embodiment of the present invention;

[0050] Figure 7 A schematic structural diagram of a shutdown control device for a vehicle heat recovery device provided by an embodiment of the present invention;

[0051] Figure 8 A schematic diagram of the structure of a shutdown control device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0052] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0053] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0054] Figure 1 A schematic diagram of a vehicle heat recovery device provided by an embodiment of the present invention, referring to Figure 1 The vehicle heat recovery device includes an engine 10, an exhaust heat exchanger 20, an expander 30, a condenser 40, a liquid storage tank 50, a working fluid pump 60, an exhaust valve 70 and an expander valve 80. The exhaust heat exchanger 20 includes a first inlet 21, a first outlet 22, a second inlet 23 and a second outlet 24. The first inlet 21 is connected to the first outlet 22, and the second inlet 23 is connected to the second outlet 24. The exhaust valve 70 includes a third inlet 71, a third outlet 72 and a third outlet 73. The expander valve 80 includes a fourth inlet 81, a fourth outlet 82 and a fourth outlet 84. The third outlet 83 is connected to the exhaust port of the engine 10, the third A outlet 72 is connected to the first inlet 21, the third B outlet 73 and the first outlet 22 are both connected to the outside air, the outlet of the liquid storage tank 50 is connected to the inlet of the working fluid pump 60, the outlet of the working fluid pump 60 is connected to the second inlet 23, the second outlet 24 is connected to the fourth inlet 81, the fourth A outlet 82 is connected to the inlet of the expander 30, the outlet of the expander 30 and the fourth B outlet 83 are both connected to the inlet of the condenser 40, and the outlet of the condenser 40 is connected to the inlet of the liquid storage tank 50.

[0055] It should be noted that when the vehicle heat recovery equipment is in working condition, the valve opening of the third A outlet 72 of the exhaust valve 70 is 100%, the valve opening of the third B outlet 73 is 0%, the valve opening of the fourth A outlet 82 of the expansion valve 80 is 100%, the valve opening of the fourth B outlet 83 is 0%, and the working fluid pump 60 operates at the rated speed. The gas discharged from the exhaust port of the engine 10 will enter the exhaust heat exchanger 20 through the third inlet 71, the third A outlet 72 and the first inlet 21. The coolant discharged from the outlet of the liquid storage tank 50 can enter the exhaust heat exchanger 20 from the second inlet 23 under the action of the working fluid pump 60. The coolant and gas entering the exhaust heat exchanger 20 can exchange heat, the temperature of the gas will decrease and be discharged to the outside air from the first outlet 22, the temperature of the coolant will increase and vaporize and convert into gas, the gas converted from the coolant will enter the expander 30 through the fourth inlet 81, the fourth A outlet 82 and the inlet of the expander 30, the gas enters the expander 30 to do work and drive the generator connected to the expander 30 to work to achieve heat recovery, and the gas discharged from the outlet of the expander 30 will enter the condenser 40 through the inlet of the condenser 40 to condense into coolant, and the coolant converted from the gas will enter the liquid storage tank 50 through the outlet of the condenser 40 and the inlet of the liquid storage tank 50.

[0056] Figure 2A flowchart of a shutdown control method for a vehicle heat recovery device provided in an embodiment of the present invention. The shutdown control method for a vehicle heat recovery device in an embodiment of the present invention is applicable to situations where shutdown control of a vehicle heat recovery device is required. The shutdown control method for a vehicle heat recovery device can be executed by a shutdown control device for a vehicle heat recovery device, which can be implemented in software and / or hardware and is specifically configured in the shutdown control device. Figure 2 , the shutdown control method in the embodiment of the present invention includes:

[0057] S110, obtaining a shutdown instruction.

[0058] Exemplarily, the shutdown control device of the vehicle heat recovery device may be a controller 90 in the vehicle, and the controller 90 may generate a shutdown instruction when determining that the vehicle heat recovery device needs to be shut down.

[0059] S120. According to the shutdown command, the valve opening of the third A outlet is controlled to decrease, the valve opening of the third B outlet is controlled to increase, and the speed of the working fluid pump is controlled to decrease until the gas pressure information on the second outlet side meets the first preset range and the gas temperature information meets the second preset range.

[0060] refer to Figure 1 The vehicle heat recovery device in the embodiment of the present invention also includes a second temperature sensor T2 and a first air pressure sensor P1 arranged on the side of the second outlet 24. The controller 90 is respectively communicated with the second temperature sensor T2 and the first air pressure sensor P1, and the gas temperature information on the side of the second outlet 24 can be obtained through the second temperature sensor T2, and the gas pressure information on the side of the second outlet 24 can be obtained through the first air pressure sensor P1.

[0061] Exemplarily, after generating the shutdown command, the controller 90 triggers the shutdown program and starts to execute the shutdown program. Specifically, the controller 90 first controls the valve opening of the third A outlet 72 to gradually decrease, the valve opening of the third B outlet 73 to gradually increase, and the speed of the working fluid pump 60 to gradually decrease. In this process, the gas entering the exhaust heat exchanger 20 will gradually decrease, the coolant entering the exhaust heat exchanger 20 will gradually decrease, and the gas converted from the coolant will also gradually decrease. In this way, the gas pressure information on the side of the second outlet 24 will decrease. When the gas pressure information on the side of the second outlet 24 decreases to the first preset range (for example, 0.7MPa~0.9MPa), and the gas temperature information meets the second preset range (for example, (K1+13)℃~(K1+17)℃, K1 represents the vaporization temperature of the coolant), the controller 90 will control the valve opening of the third A outlet 72 to stop decreasing, the valve opening of the third B outlet 73 to stop increasing, and the speed of the working fluid pump 60 to stop decreasing. After executing step S120, the gas vaporized from the coolant will still enter the expander 30 for heat recovery, which is beneficial to improving the utilization rate of waste heat during the shutdown process.

[0062] It should be noted that, in the process of executing step S120, ensuring that the gas temperature information on the second outlet 24 side meets the second preset range (for example, (K1+13)°C~(K1+17)°C, K1 represents the vaporization temperature of the coolant) can ensure that there is no mixed coolant in the gas on the second outlet 24 side, thereby avoiding the problem of damage to the expander 30 caused by the coolant entering the expander 30 through the fourth inlet 81, the fourth A outlet 82 and the inlet of the expander 30.

[0063] S130, controlling the valve opening of the fourth A outlet to decrease, and controlling the valve opening of the fourth B outlet to increase, until the gas pressure information on the second outlet side meets the first preset range, and the valve opening of the fourth A outlet decreases to a minimum value.

[0064] Exemplarily, after the gas pressure information on the second outlet 24 side is reduced to the first preset range (e.g., 0.7MPa to 0.9MPa), and the gas temperature information satisfies the second preset range (e.g., (K1+13)°C to (K1+17)°C, K1 represents the vaporization temperature of the coolant), the controller 90 will control the valve opening of the fourth A outlet 82 to gradually decrease and the valve opening of the fourth B outlet 83 to gradually increase. In this process, the gas entering the expander 30 from the fourth A outlet 82 gradually decreases, and the gas entering the condenser 40 from the fourth B outlet 83 gradually increases. When the valve opening of the fourth A outlet 82 is reduced to the minimum value (i.e., 0%), and the gas pressure information on the second outlet 24 side satisfies the first preset range (e.g., 0.7MPa to 0.9MPa), the controller 90 will control the valve opening of the fourth A outlet 82 to stop decreasing and the valve opening of the fourth B outlet 83 to stop increasing. After executing step S130, the gas vaporized from the coolant will not enter the expander 30. In this way, the gas vaporized from the coolant will enter the condenser 40 completely and quickly, which is conducive to accelerating the condensation of the gas.

[0065] It should be noted that, in the process of controlling the valve opening of the fourth A outlet 82 to gradually decrease and the valve opening of the fourth B outlet 83 to gradually increase, the gas pressure information on the second outlet 24 side is kept to meet the first preset range, which can avoid the gas on the second outlet 24 side from flowing back to the exhaust heat exchanger 20 due to excessively high pressure, and the gas on the second outlet 24 side from being unable to reach the condenser 40 due to excessively low pressure.

[0066] S140, controlling the valve opening of the third A outlet to decrease, and controlling the valve opening of the third B outlet to increase, until the valve opening of the third A outlet decreases to a minimum value, and the valve opening of the third B outlet increases to a maximum value.

[0067] Exemplarily, after the valve opening of the fourth A outlet 82 is reduced to a minimum value (i.e., 0%), and the gas pressure information on the second outlet 24 side meets the first preset range (e.g., 0.7MPa to 0.9MPa), the controller 90 controls the valve opening of the third A outlet 72 to gradually decrease and the valve opening of the third B outlet 73 to gradually increase. In this process, the gas entering the exhaust heat exchanger 20 will gradually decrease. When the valve opening of the third A outlet 72 is reduced to a minimum value (i.e., 0%), and the valve opening of the third B outlet 73 is increased to a maximum value (i.e., 100%), the controller 90 controls the valve opening of the third A outlet 72 to stop decreasing and the valve opening of the third B outlet 73 to stop increasing. After executing step S140, all the gas discharged from the exhaust port of the engine 10 will be discharged into the outside air from the third B outlet 73 of the exhaust valve 70. After executing step S130 , the gas in the exhaust heat exchanger 20 will become less and less. Before the working fluid pump 60 is shut down, the gas in the exhaust heat exchanger 20 will be fully cooled, and the residual heat in the exhaust heat exchanger 20 can be completely cooled.

[0068] S150, controlling the valve opening of the fourth B outlet to increase until the valve opening of the fourth B outlet increases to a maximum value.

[0069] Exemplarily, after the valve opening of the third A outlet 72 is reduced to the minimum value and the valve opening of the third B outlet 73 is increased to the maximum value, the controller 90 will control the valve opening of the fourth B outlet to gradually increase, so as to ensure that the gas on the second outlet 24 side can quickly enter the condenser 40. In this process, the speed of the gas discharged from the fourth B outlet 83 will gradually increase. When the valve opening of the fourth B outlet 83 increases to the maximum value (i.e., 100%), the controller 90 will control the valve opening of the fourth B outlet 83 to stop increasing, and the gas on the second outlet 24 side can enter the condenser 40 at the fastest speed.

[0070] S160, control the working fluid pump and condenser motors to stop.

[0071] For example, after controlling the valve opening of the third A outlet 72 to decrease to the minimum value, the valve opening of the third B outlet 73 to increase to the maximum value, the valve opening of the fourth A outlet 82 to decrease to the minimum value, and the valve opening of the fourth A outlet to decrease to the minimum value, the controller 90 will control the motors of the working fluid pump 60 and the condenser 40 to shut down, thereby shutting down the vehicle heat recovery equipment.

[0072] The technical solution of the embodiment of the present invention is to set a shutdown control method for the vehicle heat recovery equipment to first control the valve opening of the third A outlet 72 to decrease, the valve opening of the third B outlet 73 to increase, and the rotation speed of the working fluid pump 60 to decrease according to the shutdown instruction until the gas pressure information on the second outlet 24 side meets the first preset range and the gas temperature information meets the second preset range, and then control the valve opening of the fourth A outlet 82 to decrease and the valve opening of the fourth B outlet 83 to increase until the gas pressure information on the second outlet 24 side meets the first preset range and the valve opening of the fourth A outlet 82 is reduced to a minimum value, and then control the valve opening of the third A outlet 72 to decrease and the valve opening of the third B outlet 73 to increase until the valve opening of the third A outlet 72 is reduced to a minimum value and the valve opening of the third B outlet 73 is increased to a maximum value, and then control the valve opening of the fourth B outlet 83 to increase until the valve opening of the fourth B outlet 83 is increased to a maximum value, and finally control the motors of the working fluid pump 60 and the condenser 40 to shut down. The invention solves the problems that part of the waste heat is not fully utilized and part of the waste heat is discharged without being cooled in the shutdown control method of the existing heat recovery equipment, which is beneficial to improving the utilization rate of the waste heat during the shutdown process and realizing the complete cooling of the waste heat entering the exhaust heat exchanger.

[0073] Based on the above embodiments, Figure 3 A flowchart of another shutdown control method of a vehicle heat recovery device provided by an embodiment of the present invention, Figure 3 The embodiment shown in the figure describes in detail how to obtain the shutdown instruction. Figure 3 The shutdown control method of the vehicle heat recovery device in the embodiment of the present invention includes:

[0074] S210: Acquire exhaust gas temperature information at the exhaust port side of the engine.

[0075] Exemplary, reference Figure 1 The vehicle heat recovery device further includes a first temperature sensor T1 disposed at the exhaust port side of the engine 10 . The controller 90 is in communication connection with the temperature sensor T1 , and exhaust temperature information at the exhaust port side of the engine 10 can be obtained through the first temperature sensor T1 .

[0076] S220: Generate a shutdown instruction according to the exhaust temperature information.

[0077] As a feasible implementation manner, generating a shutdown instruction according to the exhaust temperature information includes: if the exhaust temperature information is less than a preset temperature threshold and the duration is greater than a preset time threshold, generating a shutdown instruction.

[0078] For example, if the exhaust temperature information is less than a preset temperature threshold (e.g., 150°C) and the duration is greater than a preset time threshold (e.g., 20s), it means that the waste heat of the gas discharged from the exhaust port of the engine 10 is no longer worthy of recovery, and the vehicle heat recovery equipment needs to be shut down. At this time, the controller 90 will generate a shutdown command and start the shutdown procedure.

[0079] Compared to determining whether to generate a shutdown command based on whether the engine 10 is shut down, the embodiment of the present invention determines whether to generate a shutdown command based on the exhaust temperature information on the exhaust port side of the engine 10. This can avoid the situation where the heat of the gas exhausted for a period of time after the engine 10 is shut down is not fully utilized, which is beneficial to improving the utilization rate of waste heat.

[0080] S230. According to the shutdown command, the valve opening of the third A outlet is controlled to decrease, the valve opening of the third B outlet is controlled to increase, and the speed of the working fluid pump is controlled to decrease until the gas pressure information on the second outlet side meets the first preset range and the gas temperature information meets the second preset range.

[0081] S240, controlling the valve opening of the fourth A outlet to decrease, and controlling the valve opening of the fourth B outlet to increase, until the gas pressure information on the second outlet side meets the first preset range, and the valve opening of the fourth A outlet decreases to a minimum value.

[0082] S250, controlling the valve opening of the third A outlet to decrease, and controlling the valve opening of the third B outlet to increase, until the valve opening of the third A outlet decreases to a minimum value, and the valve opening of the third B outlet increases to a maximum value.

[0083] S260, controlling the valve opening of the fourth B outlet to increase until the valve opening of the fourth B outlet increases to a maximum value.

[0084] S270, control the motors of the working fluid pump and condenser to stop.

[0085] Based on the above embodiments, Figure 4 A flowchart of another shutdown control method of a vehicle heat recovery device provided by an embodiment of the present invention, Figure 4 The embodiment shown in the figure describes in detail how to control the shutdown of the working fluid pump and the motor of the condenser, and Figure 4 The shutdown control method of the vehicle heat recovery device in the embodiment of the present invention includes:

[0086] S310: Obtain a shutdown instruction.

[0087] S320. According to the shutdown command, the valve opening of the third A outlet is controlled to decrease, the valve opening of the third B outlet is controlled to increase, and the speed of the working fluid pump is controlled to decrease until the gas pressure information on the second outlet side meets the first preset range and the gas temperature information meets the second preset range.

[0088] S330, controlling the valve opening of the fourth A outlet to decrease, and controlling the valve opening of the fourth B outlet to increase, until the gas pressure information on the second outlet side meets the first preset range, and the valve opening of the fourth A outlet decreases to a minimum value.

[0089] S340, controlling the valve opening of the third A outlet to decrease, and controlling the valve opening of the third B outlet to increase, until the valve opening of the third A outlet decreases to a minimum value, and the valve opening of the third B outlet increases to a maximum value.

[0090] S350, controlling the valve opening of the fourth B outlet to increase until the valve opening of the fourth B outlet increases to a maximum value.

[0091] S360, controlling the working fluid pump to stop, and controlling the motor of the condenser to stop after a second preset time.

[0092] Exemplarily, the controller 90 first controls the working fluid pump 60 to shut down, and then controls the motor of the condenser to shut down after a second preset time after the working fluid pump 60 shuts down, thereby ensuring that the gas vaporized from the coolant can be fully condensed.

[0093] As a feasible implementation method, controlling the working fluid pump to shut down includes: controlling the speed of the working fluid pump to decrease to a preset speed; and controlling the speed of the working fluid pump to be zero after controlling the working fluid pump to rotate at the preset speed for a first preset time.

[0094] For example, when the working fluid pump is controlled to shut down, by controlling the speed of the working fluid pump 60 to decrease to a preset speed and maintain it for a first preset time (for example, 20 seconds) and then decrease it to zero, it can be further ensured that the gas in the exhaust heat exchanger 20 can be sufficiently cooled, thereby avoiding failure of the exhaust heat exchanger 20 due to the lack of coolant for heat exchange of the remaining gas.

[0095] Based on the above embodiments, Figure 5 A flowchart of another shutdown control method of a vehicle heat recovery device provided by an embodiment of the present invention, Figure 5 The embodiment shown enriches the process of the shutdown control method of the vehicle heat recovery device, referring to Figure 5 The shutdown control method of the vehicle heat recovery device in the embodiment of the present invention includes:

[0096] S410: Obtain a shutdown instruction.

[0097] S420. According to the shutdown command, the valve opening of the third A outlet is controlled to decrease, the valve opening of the third B outlet is controlled to increase, and the speed of the working fluid pump is controlled to decrease until the gas pressure information on the second outlet side meets the first preset range and the gas temperature information meets the second preset range.

[0098] S430, controlling the valve opening of the fourth outlet A to decrease, and controlling the valve opening of the fourth outlet B to increase, until the gas pressure information on the second outlet side meets the first preset range, and the valve opening of the fourth outlet A decreases to a minimum value.

[0099] S440, controlling the valve opening of the third A outlet to decrease, and controlling the valve opening of the third B outlet to increase, until the valve opening of the third A outlet decreases to a minimum value, and the valve opening of the third B outlet increases to a maximum value.

[0100] S450, controlling the valve opening of the fourth B outlet to increase until the valve opening of the fourth B outlet increases to a maximum value.

[0101] S460, control the motors of the working fluid pump and condenser to stop.

[0102] S470, obtaining valve opening information of the third A outlet, valve opening information of the third B outlet, valve opening information of the fourth A outlet, valve opening information of the fourth B outlet, rotation speed of the working fluid pump and rotation speed of the motor of the condenser.

[0103] Exemplary, reference Figure 1 The controller 90 is communicated with the exhaust valve 70 and the expander valve 80 respectively, and can not only control the valve opening of the third A outlet 72, the valve opening of the third B outlet 73, the valve opening of the fourth A outlet 82 and the valve opening of the fourth B outlet 83, but also obtain the valve opening information of the third A outlet 72, the valve opening information of the third B outlet 73, the valve opening information of the fourth A outlet 82 and the valve opening information of the fourth B outlet 83.

[0104] S480, determining whether the vehicle heat recovery device is successfully shut down based on the valve opening information of the third outlet A, the valve opening information of the third outlet B, the valve opening information of the fourth outlet A, the valve opening information of the fourth outlet B, the speed of the working fluid pump and the speed of the condenser motor.

[0105] For example, if the valve opening of the third outlet A is 0%, the valve opening of the third outlet B is 100%, the valve opening of the fourth outlet A is 0%, the valve opening of the fourth outlet B is 100%, the speed of the working fluid pump is zero, and the speed of the motor of the condenser is zero, then it is determined that the vehicle heat recovery device is shut down successfully, otherwise, it is determined that the vehicle heat recovery device fails to shut down. After determining that the vehicle heat recovery device fails to shut down, the controller 90 generates an alarm message to the display screen of the vehicle to remind the user to repair it in time.

[0106] Based on the above embodiments, Figure 6 A flowchart of another shutdown control method of a vehicle heat recovery device provided by an embodiment of the present invention, Figure 6 The embodiment shown enriches the process of the shutdown control method of the vehicle heat recovery device, referring to Figure 6 The shutdown control method of the vehicle heat recovery device in the embodiment of the present invention includes:

[0107] S510, sending a self-check instruction to the condenser, the working fluid pump, the exhaust valve and the expander valve.

[0108] S520, obtaining self-test information fed back by the condenser, the working fluid pump, the exhaust valve, and the expander valve.

[0109] Exemplary, reference Figure 1 The controller 90 is respectively connected to the condenser 40, the working fluid pump 60, the exhaust valve 70 and the expander valve 80 for communication, and can send self-test instructions to the condenser 40, the working fluid pump 60, the exhaust valve 70 and the expander valve 80, and obtain self-test information fed back by the condenser 40, the working fluid pump 60, the exhaust valve 70 and the expander valve 80 according to the received self-test instructions.

[0110] S530: Determine the fault information of the condenser, the working fluid pump, the exhaust valve and the expander valve according to the self-check information.

[0111] Exemplarily, before obtaining a shutdown command, the condenser 40, the working fluid pump 60, the exhaust valve 70 and the expander valve 80 are first self-checked to determine their fault information. Steps S540-S590 are only performed when the fault information indicates that the condenser 40, the working fluid pump 60, the exhaust valve 70 and the expander valve 80 are all normal. This is beneficial to improving the accuracy of shutdown control.

[0112] S540: Obtain a shutdown instruction.

[0113] S550. According to the shutdown command, the valve opening of the third A outlet is controlled to decrease, the valve opening of the third B outlet is controlled to increase, and the speed of the working fluid pump is controlled to decrease until the gas pressure information on the second outlet side meets the first preset range and the gas temperature information meets the second preset range.

[0114] S560, controlling the valve opening of the fourth A outlet to decrease, and controlling the valve opening of the fourth B outlet to increase, until the gas pressure information on the second outlet side meets the first preset range, and the valve opening of the fourth A outlet decreases to a minimum value.

[0115] S570, controlling the valve opening of the third A outlet to decrease, and controlling the valve opening of the third B outlet to increase, until the valve opening of the third A outlet decreases to a minimum value, and the valve opening of the third B outlet increases to a maximum value.

[0116] S580, controlling the valve opening of the fourth B outlet to increase until the valve opening of the fourth B outlet increases to a maximum value.

[0117] S590, control the motors of the working fluid pump and condenser to stop.

[0118] Based on the same inventive concept, an embodiment of the present invention provides a shutdown control device for a vehicle heat recovery device, Figure 7 A schematic diagram of a shutdown control device for a vehicle heat recovery device according to an embodiment of the present invention is provided. Figure 7 The shutdown control device of the vehicle heat recovery equipment in the embodiment of the present invention includes:

[0119] The shutdown instruction acquisition unit 610 is used to acquire a shutdown instruction.

[0120] The first control unit 620 is used to control the valve opening of the third A outlet to decrease according to the shutdown command, control the valve opening of the third B outlet to increase, and control the speed of the working fluid pump to decrease until the gas pressure information on the second outlet side meets the preset range and the gas temperature information meets the preset range.

[0121] The second control unit 630 is used to control the valve opening of the fourth A outlet to decrease, and control the valve opening of the fourth B outlet to increase, until the gas pressure information on the second outlet side meets the preset range and the valve opening of the fourth A outlet is reduced to the minimum value.

[0122] The third control unit 640 is used to control the valve opening of the third A outlet to decrease, and control the valve opening of the third B outlet to increase, until the valve opening of the third A outlet decreases to a minimum value, and the valve opening of the third B outlet increases to a maximum value.

[0123] The fourth control unit 650 is used to increase the valve opening of the fourth B outlet until the valve opening of the fourth B outlet increases to a maximum value.

[0124] The fifth control unit 660 is used to control the working fluid pump and the condenser to shut down.

[0125] The shutdown control device of the vehicle heat recovery equipment provided in the embodiment of the present invention can execute the shutdown control method of the vehicle heat recovery equipment provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0126] Figure 8 A schematic diagram of a shutdown control device 800 that can be used to implement an embodiment of the present invention is shown, and the shutdown control device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The shutdown control device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0127] like Figure 8 As shown, the shutdown control device 700 includes at least one processor 710, and a memory connected to the at least one processor 710, such as a read-only memory (ROM) 720, a random access memory (RAM) 730, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 710 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 720 or the computer program loaded from the storage unit 780 to the random access memory (RAM) 730. In the RAM 730, various programs and data required for the operation of the shutdown control device 700 can also be stored. The processor 710, the ROM 720, and the RAM 730 are connected to each other through a bus 740. An input / output (I / O) interface 750 is also connected to the bus 740.

[0128] A number of components in the shutdown control device 700 are connected to the I / O interface 750, including: an input unit 760, such as a keyboard, a mouse, etc.; an output unit 770, such as various types of displays, speakers, etc.; a storage unit 780, such as a disk, an optical disk, etc.; and a communication unit 890, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 890 allows the shutdown control device 700 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0129] The processor 710 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 710 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 710 performs the various methods and processes described above, such as a shutdown control method for an unmanned vehicle.

[0130] In some embodiments, the shutdown control method for an unmanned vehicle may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 780. In some embodiments, part or all of the computer program may be loaded and / or installed on the shutdown control device 700 via the ROM 720 and / or the communication unit 890. When the computer program is loaded into the RAM 730 and executed by the processor 710, one or more steps of the shutdown control method for the unmanned vehicle described above may be performed. Alternatively, in other embodiments, the processor 710 may be configured to execute the shutdown control method for an unmanned vehicle in any other appropriate manner (e.g., by means of firmware).

[0131] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0132] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0133] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0134] To provide interaction with a user, the systems and techniques described herein may be implemented on a shutdown control device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and pointing device (e.g., a mouse or trackball) through which a user can provide input to the shutdown control device. Other types of devices may also be used to provide interaction with a user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0135] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0136] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0137] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0138] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0139] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A shutdown control method for a vehicle heat recovery device, the vehicle heat recovery device comprising an engine, an exhaust heat exchanger, an expander, a condenser, a liquid storage tank, a working fluid pump, an exhaust valve and an expander valve, the exhaust heat exchanger comprising a first inlet, a first outlet, a second inlet and a second outlet, the first inlet is connected to the first outlet, the second inlet is connected to the second outlet, the exhaust valve comprises a third inlet, a third A outlet and a third B outlet, the expander valve comprises a fourth inlet, a fourth A outlet and a fourth B outlet, the third inlet is connected to the exhaust port of the engine, the third A outlet is connected to the first inlet, the third B outlet and the first outlet are both connected to external air, the outlet of the liquid storage tank is connected to the inlet of the working fluid pump, the outlet of the working fluid pump is connected to the second inlet, the second outlet is connected to the fourth inlet, the fourth A outlet is connected to the inlet of the expander, the outlet of the expander and the fourth B outlet are both connected to the inlet of the condenser, and the outlet of the condenser is connected to the inlet of the liquid storage tank, characterized in that The shutdown control method comprises: Get shutdown instructions; According to the shutdown instruction, the valve opening of the third outlet A is controlled to decrease, the valve opening of the third outlet B is controlled to increase, and the speed of the working fluid pump is controlled to decrease until the gas pressure information on the second outlet side meets the first preset range and the gas temperature information meets the second preset range; Controlling the valve opening of the fourth outlet A to decrease, and controlling the valve opening of the fourth outlet B to increase, until the gas pressure information on the second outlet side meets the first preset range, and the valve opening of the fourth outlet A decreases to a minimum value; Controlling the valve opening of the third outlet A to decrease, and controlling the valve opening of the third outlet B to increase, until the valve opening of the third outlet A decreases to a minimum value, and the valve opening of the third outlet B increases to a maximum value; Controlling the valve opening of the fourth B outlet to increase until the valve opening of the fourth B outlet increases to a maximum value; The motors of the working fluid pump and the condenser are controlled to stop.

2. The shutdown control method according to claim 1, characterized in that: Get shutdown instructions, including: Acquiring exhaust gas temperature information at the exhaust port side of the engine; The shutdown instruction is generated according to the exhaust temperature information.

3. The shutdown control method according to claim 2, characterized in that: Generating the shutdown instruction according to the exhaust temperature information includes: If the exhaust temperature information is less than a preset temperature threshold and the duration is greater than a preset time threshold, a shutdown instruction is generated.

4. The shutdown control method according to claim 1, characterized in that: Controlling the motors of the working fluid pump and the condenser to stop includes: The working fluid pump is controlled to stop, and the motor of the condenser is controlled to stop after a second preset time.

5. The shutdown control method according to claim 4, characterized in that: Controlling the working fluid pump to stop, comprising: Controlling the speed of the working fluid pump to decrease to a preset speed; After controlling the working fluid pump to rotate at the preset speed for a first preset time, the speed of the working fluid pump is controlled to be zero.

6. The shutdown control method according to claim 1, characterized in that: After controlling the working fluid pump and the condenser to shut down, the shutdown control method further includes: Obtaining valve opening information of the third outlet A, valve opening information of the third outlet B, valve opening information of the fourth outlet A, valve opening information of the fourth outlet B, rotation speed of the working fluid pump and rotation speed of the motor of the condenser; Whether the vehicle heat recovery device is successfully shut down is determined based on the valve opening information of the third A outlet, the valve opening information of the third B outlet, the valve opening information of the fourth A outlet, the valve opening information of the fourth B outlet, the rotation speed of the working fluid pump and the rotation speed of the motor of the condenser.

7. The shutdown control method according to claim 1, characterized in that: Before obtaining the shutdown instruction, the shutdown control method further includes: Sending a self-check instruction to the condenser, the working fluid pump, the exhaust valve and the expander valve; Obtaining self-test information fed back by the condenser, the working fluid pump, the exhaust valve and the expander valve; Fault information of the condenser, the working fluid pump, the exhaust valve and the expander valve is determined according to the self-check information.

8. A shutdown control device for a vehicle heat recovery device, used to execute the shutdown control method according to any one of claims 1 to 7, characterized in that: The shutdown control device comprises: A shutdown instruction acquisition unit, used for acquiring a shutdown instruction; a first control unit, configured to control the valve opening of the third outlet A to decrease, control the valve opening of the third outlet B to increase, and control the speed of the working fluid pump to decrease according to the shutdown instruction, until the gas pressure information on the second outlet side meets a preset range, and the gas temperature information meets a preset range; a second control unit, configured to control the valve opening of the fourth outlet A to decrease, and control the valve opening of the fourth outlet B to increase, until the gas pressure information at the second outlet side meets a preset range, and the valve opening of the fourth outlet A decreases to a minimum value; A third control unit is used to control the valve opening of the third outlet A to decrease, and control the valve opening of the third outlet B to increase, until the valve opening of the third outlet A decreases to a minimum value, and the valve opening of the third outlet B increases to a maximum value; A fourth control unit, used for increasing the valve opening of the fourth B outlet until the valve opening of the fourth B outlet increases to a maximum value; A fifth control unit is used to control the working fluid pump and the condenser to shut down.

9. A shutdown control device, characterized in that: The shutdown control device comprises: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the shutdown control method as described in any one of claims 1-7.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the shutdown control method as described in any one of claims 1 to 7 is implemented.

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