A shutdown control method, device, equipment and medium for vehicle heat recovery equipment

Abstract

The present invention discloses a shutdown control method, device, equipment, and medium for vehicle heat recovery equipment. The shutdown control method includes: obtaining a shutdown instruction; controlling the opening of the third A outlet valve to decrease, the opening of the third B outlet valve to increase, and the speed of the working fluid pump to decrease until the gas pressure information on the second outlet side meets a first preset range and the gas temperature information meets a second preset range; controlling the opening of the fourth A outlet valve to decrease, and the opening of the fourth B outlet valve to increase until the gas pressure information on the second outlet side meets the first preset range and the opening of the fourth A outlet valve is reduced to a minimum value; controlling the opening of the third A outlet valve to decrease, and the opening of the third B outlet valve to increase until the opening of the third A outlet valve is reduced to a minimum value and the opening of the third B outlet valve is increased to a maximum value; controlling the opening of the fourth B outlet valve to increase until the opening of the fourth B outlet valve is increased to a maximum value; and controlling the working fluid pump and condenser motor to shut down. This method is beneficial for improving the utilization rate of waste heat.

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 generates a large amount of waste heat during operation. In order to effectively utilize the waste heat, a heat recovery device is installed in the vehicle.

[0003] 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 effects brought about by the simultaneous shutdown 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 in existing shutdown control methods of heat recovery equipment that some waste heat is not fully utilized and some waste heat is discharged without being cooled.

[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 including 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 including a first inlet, a first outlet, a second inlet, and a second outlet, the first inlet and the first outlet being connected, the second inlet and the second outlet being connected, the exhaust valve including a third inlet, a third A outlet, and a third B outlet, the expander valve including a fourth inlet, a fourth A outlet, and a fourth B outlet, the third inlet being connected to the exhaust port of the engine, the third A outlet being connected to the first inlet, the third B outlet and the first outlet both being connected to external air, the outlet of the liquid storage tank being connected to the inlet of the working fluid pump, the outlet of the working fluid pump being connected to the second inlet, the second outlet being connected to the fourth inlet, the fourth A outlet being connected to the inlet of the expander, the outlet of the expander and the fourth B outlet both being connected to the inlet of the condenser, and the outlet of the condenser being connected to the inlet of the liquid storage tank, the shutdown control method comprising:

[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 at 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 lower than a preset temperature threshold and the duration is longer 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, the speed of the working fluid pump, and the 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 rotational speed of the working fluid pump, and the rotational speed of the condenser motor.

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

[0026] Sending a self-test 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 based on the self-test information.

[0029] In a second aspect, an embodiment of the present invention provides a shutdown control device for a vehicle heat recovery device, configured to execute the shutdown control method described in the first aspect, the shutdown control device comprising:

[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 at 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, configured 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, configured to increase the valve opening of the fourth B outlet until the valve opening of the fourth B outlet reaches 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 provides a shutdown control method for a vehicle heat recovery device. First, according to a shutdown command, 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 at the second outlet meets the first preset range and the gas temperature information meets the second preset range. Then, the valve opening of the fourth outlet A is controlled to decrease, and the valve opening of the fourth outlet B is controlled to increase until the gas pressure information at the second outlet meets the first preset range and the valve opening of the fourth outlet A is reduced to a minimum value. Then, the valve opening of the third outlet A is controlled to decrease, and the valve opening of the third outlet B is controlled to increase until the valve opening of the third outlet A is reduced to a minimum value and the valve opening of the third outlet B is increased to a maximum value. Then, the valve opening of the fourth outlet B is controlled to increase until the valve opening of the fourth outlet B is increased to a maximum value. Finally, the motors of the working fluid pump and the condenser are controlled to shut down. This method solves the problems of existing shutdown control methods for heat recovery devices, such as underutilization of some waste heat and discharge of some waste heat before cooling. It is beneficial for improving the utilization rate of waste heat during shutdown and achieving complete cooling of waste heat entering the exhaust heat exchanger.

[0042] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily 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 for a vehicle heat recovery device provided by an embodiment of the present invention;

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

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

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

[0049] Figure 6 A flowchart of another method for controlling shutdown 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 structural diagram 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 solutions of the present invention, the technical solutions 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 embodiments described 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 making creative efforts should fall within the scope of protection of the present invention.

[0053] It should be noted that the terms "first", "second", etc. in the description 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 numbers 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 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 This is a schematic diagram of the structure 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 A 72 and a third outlet B 73. The expander valve 80 includes a fourth inlet 81, a fourth outlet A 82 and a fourth outlet B The outlet 83 and the third inlet 71 are 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 expander 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, and 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 perform work and drive the generator connected to the expander 30 to work to achieve heat recovery. 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. 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 2This is a flow chart of a shutdown control method for a vehicle heat recovery device provided by an embodiment of the present invention. The shutdown control method for a vehicle heat recovery device in the embodiment of the present invention is applicable to situations where shutdown control of the vehicle heat recovery device is required. The shutdown control method for the vehicle heat recovery device can be executed by a shutdown control device for the vehicle heat recovery device. The device can be implemented using 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: Obtain a shutdown instruction.

[0058] Exemplarily, the shutdown control device of the vehicle heat recovery device may be a controller 90 in the vehicle. 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 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.

[0060] refer to Figure 1 The vehicle heat recovery device in the embodiment of the present invention further 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 communicatively connected to the second temperature sensor T2 and the first air pressure sensor P1 respectively, and can obtain gas temperature information on the side of the second outlet 24 through the second temperature sensor T2, and obtain gas pressure information on the side of the second outlet 24 through the first air pressure sensor P1.

[0061] For example, after generating a shutdown command, the controller 90 triggers a shutdown procedure and begins executing the shutdown procedure. 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. During 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 a first preset range (e.g., 0.7MPa to 0.9MPa) and the gas temperature information meets a second preset range (e.g., (K1+13)°C to (K1+17)°C, where K1 represents the vaporization temperature of the coolant), the controller 90 controls 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 coolant mixed 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 outlet 82 and the inlet of the expander 30.

[0063] S130, 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.

[0064] For example, after the gas pressure information on the second outlet 24 side drops to a first preset range (e.g., 0.7 MPa to 0.9 MPa) and the gas temperature information satisfies a second preset range (e.g., (K1+13)°C to (K1+17)°C, where K1 represents the vaporization temperature of the coolant), the controller 90 controls 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. During this process, the gas entering the expander 30 from the fourth A outlet 82 gradually decreases, while the gas entering the condenser 40 from the fourth B outlet 83 gradually increases. When the valve opening of the fourth A outlet 82 drops to a minimum value (i.e., 0%) and the gas pressure information on the second outlet 24 side satisfies the first preset range (e.g., 0.7 MPa to 0.9 MPa), the controller 90 controls 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 all and quickly enter the condenser 40 , 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 within 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 excessive pressure, and the gas on the second outlet 24 side from being unable to reach the condenser 40 due to excessive pressure.

[0066] S140, 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.

[0067] For example, after the valve opening of the fourth outlet 82 decreases to a minimum value (i.e., 0%) and the gas pressure information on the second outlet 24 side meets a first preset range (e.g., 0.7 MPa to 0.9 MPa), the controller 90 controls the valve opening of the third outlet 72 to gradually decrease and the valve opening of the third outlet 73 to gradually increase. During this process, the gas entering the exhaust heat exchanger 20 gradually decreases. When the valve opening of the third outlet 72 decreases to a minimum value (i.e., 0%) and the valve opening of the third outlet 73 increases to a maximum value (i.e., 100%), the controller 90 controls the valve opening of the third outlet 72 to stop decreasing and the valve opening of the third outlet 73 to stop increasing. After executing step S140, all gas exhausted from the exhaust port of the engine 10 is discharged into the outside air through the third 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 stops, the gas in the exhaust heat exchanger 20 will be fully cooled, and the waste 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] For example, after 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, the controller 90 controls the valve opening of the fourth B outlet to gradually increase, thereby ensuring that the gas on the second outlet 24 side can quickly enter the condenser 40. During 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 a maximum value (i.e., 100%), the controller 90 controls 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 motors of the working fluid pump and condenser 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 realizing the shutdown of the vehicle heat recovery equipment.

[0072] The technical solution of the embodiment of the present invention is to set a shutdown control method for vehicle heat recovery equipment, first controlling the valve opening of the third A outlet 72 to decrease, the valve opening of the third B outlet 73 to increase, and the 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 controlling 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 controlling 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, then controlling 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 controlling the motors of the working fluid pump 60 and the condenser 40 to shut down. The invention solves the problems in the shutdown control method of the existing heat recovery equipment that some waste heat is not fully utilized and some waste heat is discharged without being cooled. It is beneficial to improve the utilization rate of waste heat during the shutdown process and realize the complete cooling of the waste heat entering the exhaust heat exchanger.

[0073] Based on the above embodiments, Figure 3 This is a flow chart of another shutdown control method for 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 on the exhaust port side of the engine 10 . The controller 90 is in communication with the temperature sensor T1 and can obtain exhaust temperature information on the exhaust port side of the engine 10 through the first temperature sensor T1 .

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

[0077] As a feasible implementation, 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 (for example, 150°C) and the duration is greater than a preset time threshold (for example, 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 program.

[0079] Compared with 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, thereby avoiding the situation where the heat of the gas discharged 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 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.

[0081] S240, 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.

[0082] S250, 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.

[0083] S260: Control 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 This is a flowchart of another shutdown control method for 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 medium pump and the condenser motor. 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 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.

[0088] S330, 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.

[0089] S340, 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.

[0090] S350: Control 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: Control the working fluid pump to stop, and control the condenser motor to stop after a second preset time.

[0092] Illustratively, the controller 90 first controls the working fluid pump 60 to stop, and then controls the condenser motor to stop after a second preset time after the working fluid pump 60 stops, to ensure that the gas evaporated 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; 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 stop, 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, 20s) and then decrease it to zero, it can be further ensured that the gas in the exhaust heat exchanger 20 can be fully cooled, thereby avoiding the exhaust heat exchanger 20 from malfunctioning due to the remaining gas having no coolant for heat exchange.

[0095] Based on the above embodiments, Figure 5 This is a flowchart of another shutdown control method for 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 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.

[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 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.

[0100] S450: Control 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. Obtain 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, speed of the working fluid pump, and speed of the condenser motor.

[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. Determine 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 condenser motor is zero, then the vehicle heat recovery device is determined to have successfully shut down. Otherwise, the vehicle heat recovery device is determined to have failed to shut down. Upon determining that the vehicle heat recovery device has failed to shut down, the controller 90 generates an alarm message on the vehicle's display screen to remind the user to promptly repair the device.

[0106] Based on the above embodiments, Figure 6 This is a flowchart of another shutdown control method for 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: Send a self-test instruction to the condenser, the working fluid pump, the exhaust valve, and the expander valve.

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

[0109] Exemplary, reference Figure 1 The controller 90 is respectively communicated with the condenser 40, the working fluid pump 60, the exhaust valve 70 and the expander valve 80, 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 fault information of the condenser, the working fluid pump, the exhaust valve, and the expander valve based on the self-test information.

[0111] For example, before obtaining the 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 conducive to improving the accuracy of the shutdown control.

[0112] S540: Obtain a shutdown instruction.

[0113] S550. 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.

[0114] S560: 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 on the second outlet side meets the first preset range and the valve opening of the fourth outlet A decreases to the minimum value.

[0115] S570: 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.

[0116] S580: Control 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 This is a schematic diagram of the structure of a shutdown control device for a vehicle heat recovery device provided by an embodiment of the present invention, with reference to 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 outlet A to decrease according to the shutdown instruction, control the valve opening of the third outlet B 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 outlet A to decrease, and control the valve opening of the fourth outlet B to increase, until the gas pressure information on the second outlet side meets the preset range and the valve opening of the fourth outlet A is reduced to the minimum value.

[0122] The third control unit 640 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.

[0123] The fourth control unit 650 is configured 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. 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 assistants, 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 claimed herein.

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

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

[0129] Processor 710 can be various general-purpose and / or specialized processing components with processing and computing capabilities. Some examples of processor 710 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. Processor 710 executes the various methods and processes described above, such as the 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 an 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 embodiments of the systems and techniques described 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), system-on-chip systems (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system that includes 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, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

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

[0134] To provide for user interaction, the systems and techniques described herein can 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 the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the shutdown control device. Other types of devices can also be used to provide for user interaction; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0135] The systems and techniques described herein can be implemented in a computing system that includes back-end 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 front-end components (e.g., a user computer with a graphical user interface or 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 back-end components, middleware components, or front-end components. The components of the system can 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 clients and servers. The clients and servers are typically remote from each other and typically interact via a communication network. This client-server relationship arises through computer programs running on the respective computers, creating a client-server relationship. The server may be a cloud server, also known as a cloud computing server or cloud host. This server is a hosting product within the cloud computing service ecosystem that addresses the management difficulties and limited scalability of traditional physical hosting and VPS services.

[0137] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0138] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

[0139] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection 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 and the first outlet being communicated, the second inlet and the second outlet being communicated, the exhaust valve comprising a third inlet, a third A outlet, and a third B outlet, the expander valve comprising a fourth inlet, a fourth A outlet, and a fourth B outlet, the third inlet being communicated with the exhaust port of the engine, the third A outlet being communicated with the first inlet, the third B outlet and the first outlet both being communicated with external air, the outlet of the liquid storage tank being communicated with the inlet of the working fluid pump, the outlet of the working fluid pump being communicated with the second inlet, the second outlet being communicated with the fourth inlet, the fourth A outlet being communicated with the inlet of the expander, the outlet of the expander and the fourth B outlet both being communicated with the inlet of the condenser, and the outlet of the condenser being communicated with the inlet of the liquid storage tank, characterized in that The shutdown control method includes: 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 at 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; Control the motors of the working fluid pump and the condenser 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 lower than a preset temperature threshold and the duration is longer 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, including: 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, the speed of the working fluid pump, and the 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 rotational speed of the working fluid pump, and the rotational speed of the condenser motor.

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-test 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 based on the self-test 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 includes: 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 at 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, configured 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, configured to increase the valve opening of the fourth B outlet until the valve opening of the fourth B outlet reaches 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 includes: 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 according to any one of claims 1 to 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 according to any one of claims 1 to 7 is implemented.

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