Refrigeration capacity recovery apparatus for vehicle

Abstract

The invention provides a cooling capacity recovery device of a vehicle. Relates to the technical field of vehicles. The equipment comprises a controller, an LNG cylinder, a water bath type heat exchanger, an engine energy supply assembly, a cooling system, a liquid outlet pipeline, a first cooling pipeline and a second cooling pipeline, the liquid outlet pipeline is arranged in the water bath type heat exchanger in a penetrating mode, one end of the liquid outlet pipeline is connected with the LNG cylinder, the other end of the liquid outlet pipeline is connected with the engine energy supply assembly, and the second cooling pipeline is connected with the engine energy supply assembly. The engine energy supply assembly is further used for being connected with an engine of the vehicle so as to convey gasified natural gas to the engine. The cooling system comprises a compressor, an evaporator and a condenser, the compressor is connected with a first cooling pipeline and the condenser through a first adjusting valve, the evaporator is connected with the compressor and the condenser, and the first cooling pipeline is further connected with the water bath type heat exchanger; and the controller is connected with the first adjusting valve and used for adjusting the first adjusting valve according to the signal of the engine and / or the signal of the LNG cylinder, and the cooling capacity recycling efficiency of the vehicle is improved.

Description

Technical Field

[0001] This application relates to the technical field of vehicles, and particularly to a cold energy recovery device for a vehicle. Background Art

[0002] With the rapid development of automotive technology and new energy, Liquefied Natural Gas (LNG), as a clean energy source, is widely used as vehicle fuel. During the operation of an LNG vehicle, LNG needs to be vaporized from a liquid state to a gaseous state before entering the engine, and a large amount of cold energy is generated during the vaporization process.

[0003] In related technologies, engine coolant is usually used for cold energy recovery of vehicles. Specifically, LNG in the LNG cylinder is transported to a water bath vaporizer through a liquid outlet pipeline, vaporized by heat exchange with the engine coolant, and then reaches the engine.

[0004] However, in the above process, after the engine coolant absorbs excessive cold energy, its temperature may become too low, thereby affecting the efficiency of the engine. In this case, cold energy resources may be wasted, resulting in a low cold energy recovery efficiency of the vehicle. Summary of the Invention

[0005] This application provides a cold energy recovery device for a vehicle to solve the problem of low cold energy recovery efficiency of the vehicle.

[0006] In a first aspect, this application provides a cold energy recovery device for a vehicle, including a controller, an LNG cylinder, a water bath heat exchanger, an engine energy supply component, a cooling system, a liquid outlet pipeline, a first cooling pipeline, and a second cooling pipeline, wherein,

[0007] The liquid outlet pipeline passes through the water bath heat exchanger, one end of the liquid outlet pipeline is connected to the LNG cylinder, the other end of the liquid outlet pipeline is connected to the engine energy supply component, and the engine energy supply component is further used to be connected to the vehicle engine to supply vaporized natural gas to the engine;

[0008] The cooling system includes a compressor, an evaporator, and a condenser. The compressor is connected to the first cooling pipeline and the condenser through a first regulating valve. The evaporator is respectively connected to the compressor and the condenser. The first cooling pipeline is further connected to the water bath heat exchanger;

[0009] The controller is connected to the first regulating valve, and the controller is used to adjust the first regulating valve according to signals of the engine and / or signals of the LNG cylinder.

[0010] In a possible implementation, the engine power supply assembly includes a water bath vaporizer and a voltage stabilizer, where,

[0011] The input end of the water bath vaporizer is connected to the output end of the liquid outlet pipeline;

[0012] The output end of the water bath vaporizer is connected to the input end of the voltage stabilizer;

[0013] The output end of the voltage stabilizer is used to be connected to the engine.

[0014] In a possible implementation, the evaporator includes a cab evaporator and a refrigerator evaporator, and the cooling system further includes an expansion valve and a second regulating valve, where,

[0015] The cab evaporator and the refrigerator evaporator are connected in parallel;

[0016] The expansion valve is respectively connected to the output end of the condenser and the output end of the second cooling pipeline;

[0017] The expansion valve is further connected to the second regulating valve through a pipeline;

[0018] The second regulating valve is further respectively connected to the cab evaporator and the refrigerator evaporator.

[0019] In a possible implementation, the controller is further connected to the second regulating valve, where the controller is further used for:

[0020] Obtain the first temperature of the cab in the vehicle and the second temperature of the refrigerator in the vehicle;

[0021] Control the second regulating valve and / or the compressor according to the first temperature and the second temperature.

[0022] In a possible implementation, the device further includes a first pressurization pipeline, a second pressurization pipeline, an air bath vaporizer and a pressure regulating valve, where,

[0023] The first pressurization pipeline is arranged in the water bath heat exchanger, and the part of the first pressurization pipeline arranged in the water bath heat exchanger is spiral;

[0024] The first pressurization pipeline is respectively connected to the output end of the LNG gas cylinder and the input end of the air bath vaporizer;

[0025] The second pressurization pipeline is respectively connected to the output end of the air bath vaporizer and the input end of the LNG gas cylinder, and the pressure regulating valve is arranged on the second pressurization pipeline;

[0026] The controller is also connected to the pressure regulating valve.

[0027] In a possible implementation manner, the controller is further configured to:

[0028] Obtain the pressure value of the LNG cylinder;

[0029] Adjust the pressure regulating valve according to the pressure value of the LNG cylinder.

[0030] In a possible implementation manner, the controller is specifically configured to:

[0031] Receive the torque increase signal of the engine and / or the supercharging signal of the LNG cylinder;

[0032] According to the torque increase signal and / or the supercharging signal, send a first control instruction to the first regulating valve, where the first control instruction is used to control an increase in the opening ratio between the first regulating valve and the first cooling pipeline, and control a decrease in the opening ratio between the first regulating valve and the condenser.

[0033] In a possible implementation manner, the controller is further configured to:

[0034] Receive the engine's reverse dragging signal;

[0035] According to the reverse dragging signal, send a second control instruction to the first regulating valve, where the second control instruction is used to control a decrease in the opening ratio between the first regulating valve and the first cooling pipeline, and control an increase in the opening ratio between the first regulating valve and the condenser.

[0036] In a possible implementation manner, the part of the liquid outlet pipeline located in the water bath heat exchanger is spiral.

[0037] In a second aspect, an embodiment of the present application provides a vehicle, including the first aspect and the cold energy recovery device of the vehicle according to any item of the first aspect.

[0038] A cold energy recovery device for a vehicle provided by the present application passes the liquid outlet pipeline of the LNG cylinder through a water bath heat exchanger and connects it to the engine energy supply component, so that the cold energy released during the gasification process of the liquid LNG is transferred to the cooling system through the water bath heat exchanger; at the same time, the cooling system connects the condenser and the water bath heat exchanger in parallel through a first regulating valve, and the controller can dynamically adjust the first regulating valve according to the signal of the engine and / or the boosting demand signal of the LNG cylinder to control the refrigerant flow ratio flowing through the water bath heat exchanger and the condenser. In the above process, the cold energy of the LNG can be fully utilized through the water bath heat exchanger, and it can be used in the refrigeration cycle of the cooling system through the controller to meet the refrigeration demand inside the vehicle and improve the cold energy recovery efficiency of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application and used together with the specification to explain the principles of the present application.

[0040] Figure 1 It is a schematic structural diagram of a cold energy recovery device for a vehicle provided by an embodiment of the present application;

[0041] Figure 2 It is a schematic structural diagram of another cold energy recovery device for a vehicle provided by an embodiment of the present application;

[0042] Figure 3 It is a schematic structural diagram of yet another cold energy recovery device for a vehicle provided by an embodiment of the present application;

[0043] Figure 4 It is a schematic connection structure diagram of a water bath heat exchanger provided by an embodiment of the present application;

[0044] Figure 5 It is a schematic working process diagram of a controller provided by an embodiment of the present application.

[0045] DESCRIPTION OF REFERENCE NUMERALS:

[0046] 20 - Controller;

[0047] 30 - Liquefied natural gas LNG cylinder;

[0048] 40 - Water bath heat exchanger;

[0049] 41 - Liquid outlet pipeline;

[0050] 42 - First cooling pipeline;

[0051] 43 - Second cooling pipeline;

[0052] 44 - First boosting pipeline;

[0053] 45 - Second boosting pipeline;

[0054] 50 - Engine energy supply component;

[0055] 51 - Water bath vaporizer;

[0056] 52 - Voltage stabilizer;

[0057] 60 - Cooling system;

[0058] 61 - Compressor;

[0059] 62 - Evaporator;

[0060] 63 - Condenser;

[0061] 64 - First regulating valve;

[0062] 65 - Cab evaporator;

[0063] 66 - Refrigerator evaporator;

[0064] 67 - Expansion valve;

[0065] 68 - Second regulating valve;

[0066] 70 - Air bath vaporizer;

[0067] 80 - Pressure regulating valve;

[0068] 410 - Liquid outlet pipeline a;

[0069] 411 - Liquid outlet pipeline b;

[0070] 440 - Boost pipeline a;

[0071] 441 - Boost pipeline b.

[0072] Through the above - mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Description of the Embodiments

[0073] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0074] It should be noted that in the embodiments of the present application, some existing solutions in the industry such as certain software, components, models, etc. may be mentioned. They should be regarded as exemplary. The purpose is only to illustrate the feasibility in the implementation of the technical solutions of the present application, but it does not mean that the applicant has already or necessarily used this solution.

[0075] The following will specifically describe the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems with specific embodiments. These several specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0076] Figure 1 It is a schematic structural diagram of a cold energy recovery device for a vehicle provided by an embodiment of the present application.

[0077] The execution subject of the embodiments of the present application can be a vehicle or a cold energy recovery device provided in the vehicle. The cold energy recovery device can be implemented by software or by a combination of software and hardware.

[0078] Please refer to Figure 1 As shown, the cold energy recovery device 10 for a vehicle provided by an embodiment of the present application includes a controller 20, a liquefied natural gas (LNG) cylinder 30, a water bath heat exchanger 40, an engine energy supply component 50, a cooling system 60, a liquid outlet pipeline 41, a first cooling pipeline 42, and a second cooling pipeline 43.

[0079] The liquefied natural gas (LNG) cylinder 30 is used to store liquefied natural gas, that is, liquid LNG.

[0080] The liquid outlet pipeline 41 passes through the water bath heat exchanger 40. One end of the liquid outlet pipeline 41 is connected to the LNG cylinder 30, and the other end of the liquid outlet pipeline 41 is connected to the engine energy supply component 50. The engine energy supply component 50 is also used to be connected to the vehicle's engine to deliver vaporized natural gas to the engine.

[0081] The liquid outlet pipeline 41 is used to transport the liquid LNG in the LNG cylinder 30. The liquid outlet pipeline 41 includes a liquid outlet pipeline a410 and a liquid outlet pipeline b411. Specifically, the liquid outlet pipeline a410 is connected to the LNG cylinder 30 to transport the liquid LNG into the water bath heat exchanger 40, and the liquid outlet pipeline b411 is connected to the engine energy supply component 50 to transport the LNG in the water bath heat exchanger 40 to the engine energy supply component 50.

[0082] The water bath heat exchanger 40 is used to perform heat exchange with LNG. The inside of the water bath heat exchanger 40 is a refrigerant. Specifically, the water bath heat exchanger 40 can absorb the cold energy of LNG through the refrigerant, and the flow direction of the refrigerant is opposite to the flow direction of LNG to achieve countercurrent heat exchange.

[0083] The inlet of the water bath heat exchanger 40 is connected to the LNG gas cylinder 30, and the outlet of the water bath heat exchanger 40 is connected to the engine energy supply assembly 50. Specifically, the inlet of the water bath heat exchanger 40 can be connected to the LNG gas cylinder 30 through a pipeline, so that the low-temperature liquid LNG discharged from the outlet of the LNG gas cylinder 30 can enter the water bath heat exchanger 40 and perform countercurrent heat exchange with the refrigerant to absorb the cold of the LNG and reduce the temperature of the refrigerant.

[0084] The engine energy supply assembly 50 is used to provide power fuel for the vehicle's engine to drive the vehicle to run. In the embodiment of the present application, the engine energy supply assembly 50 is used to transport the vaporized LNG to the engine. Among them, the engine energy supply assembly 50 can include a vaporizer and the like.

[0085] The cooling system 60 includes a compressor 61, an evaporator 62, and a condenser 63. The compressor 61 is connected to the first cooling pipeline 42 and the condenser 63 through a first regulating valve 64. The evaporator 62 is respectively connected to the compressor 61 and the condenser 63. The first cooling pipeline 42 is also connected to the water bath heat exchanger 40.

[0086] The compressor 61 is used to provide power for the refrigeration device.

[0087] The evaporator 62 is used to absorb the heat generated by the refrigeration device. In the embodiment of the present application, the evaporator 62 can include a refrigerator evaporator and a cab evaporator.

[0088] The condenser 63 is used to dissipate heat from the refrigerant in the pipeline.

[0089] The first regulating valve 64 is used to regulate the refrigerant flow rate in the pipeline. In the embodiment of the present application, the first regulating valve 64 is used to regulate the refrigerant flow rate flowing through the water bath heat exchanger 40 and the condenser 63.

[0090] The first cooling pipeline 42 is used to transport the refrigerant to the water bath heat exchanger 40.

[0091] In the actual application process, the compressor 61 transports the refrigerant to the water bath heat exchanger 40 in the first cooling pipeline 42 and the condenser 63 through the first regulating valve 64. Among them, the condenser 63 dissipates heat from the refrigerant, and the water bath heat exchanger 40 exchanges heat with the refrigerant. Subsequently, the water bath heat exchanger 40 and the condenser 63 can transport the processed refrigerant to the evaporator 62. The refrigerant absorbs heat at the evaporator 62 and then flows back into the compressor 61 again. In this way, the cycle is repeated, so that the refrigerant releases heat at the condenser 63 and the water bath heat exchanger 40, and evaporates and absorbs heat at the evaporator 62, realizing the refrigeration cycle.

[0092] The controller 20 is connected to the first regulating valve 64, and the controller 20 is used to regulate the first regulating valve 64 according to the signal of the engine and / or the signal of the LNG cylinder 30.

[0093] The controller 20 is used to control the devices of the vehicle. Specifically, the controller 20 can control the first regulating valve 64 to regulate the refrigerant flow rate through the first cooling pipeline 42 and the condenser 63, and can also receive the signals sent by the engine and / or the LNG cylinder 30, and control the first regulating valve 64 according to the received signals.

[0094] The signal of the engine is used to indicate the operating state of the engine. For example, the signal of the engine can be the torque signal of the engine.

[0095] The signal of the LNG cylinder 30 is used to indicate the pressure state inside the LNG cylinder. For example, the signal of the LNG cylinder 30 can be the boosting signal of the LNG cylinder.

[0096] In the embodiment of the present application, the controller 20 is specifically used to: receive the torque increasing signal of the engine and / or the boosting signal of the LNG cylinder; send a first control instruction to the first regulating valve 64 according to the torque increasing signal and / or the boosting signal.

[0097] Wherein, the first control instruction is used to control to increase the opening ratio between the first regulating valve 64 and the first cooling pipeline 42, and control to decrease the opening ratio between the first regulating valve 64 and the condenser 63.

[0098] The torque increasing signal refers to the torque signal generated when the engine is accelerating or going uphill.

[0099] The boosting signal of the LNG cylinder refers to the pressure signal generated when the pressure inside the LNG cylinder is lower than the preset pressure value.

[0100] The opening ratio refers to the ratio of the refrigerant flow rates in different pipelines. In the embodiment of the present application, the sum of the opening ratios corresponding to different pipelines can be 1. For example, if the opening ratio between the first regulating valve 64 and the first cooling pipeline 42 is 70%, then the opening ratio between the first regulating valve 64 and the condenser 63 is 30%.

[0101] In the actual application process, if the controller 20 receives the signal of the engine (engine torque increasing signal), that is, the engine needs a large amount of LNG as vehicle fuel, then the controller 20 can regulate the refrigerant flow rate in the first cooling pipeline 42 according to the opening ratio 1; if the controller 20 receives the signal of the LNG cylinder 30 (boosting signal of the LNG cylinder), that is, the LNG cylinder 30 needs to output a large amount of LNG, then the controller 20 can control the first regulating valve 64 and regulate the refrigerant flow rate in the first cooling pipeline 42 according to the opening ratio 2.

[0102] If the controller 20 receives a signal from the engine (engine torque increase signal) and a signal from the LNG cylinder 30 (LNG cylinder pressurization signal), the refrigerant flow rate in the first cooling pipeline 42 can be adjusted according to the opening ratio 3.

[0103] The opening ratio 3 can be determined based on the opening ratio 1 and the opening ratio 2. Specifically, first, determine the increase ratio 1 of the opening ratio 1 and the increase ratio 2 of the opening ratio 2, and determine the sum of the increase ratio 1 and the increase ratio 2 as the increase ratio 3 of the opening ratio 3. It should be noted that the increase ratio 3 can be the cumulative value of the increase ratio 1 and the increase ratio 2, or other linear superposition combinations of the increase ratio 1 and the increase ratio 2.

[0104] For example, assume that the controller 20 receives a signal from the engine (engine torque increase signal) and a signal from the LNG cylinder 30 (LNG cylinder pressurization signal). Among them, the increase ratio 1 in the first cooling pipeline 42 corresponding to the engine torque increase signal is 10%, and the increase ratio 2 in the first cooling pipeline 42 corresponding to the LNG cylinder pressurization signal is 5%. In this case, the controller 20 controls the increase ratio between the first regulating valve 64 and the first cooling pipeline 42 to be 15%, that is, on the basis of the original refrigerant flow rate, an additional 15% of the refrigerant flow rate flows into the first cooling pipeline 42.

[0105] Next, the working process of the vehicle's cold energy recovery device will be described:

[0106] When the LNG vehicle recovers cold energy, the liquefied natural gas (LNG) in the LNG cylinder 30 flows into the water bath heat exchanger 40 from one end of the liquid outlet pipeline 41 for heat exchange. After heat exchange, the LNG flows out from the other end of the liquid outlet pipeline 41, enters the engine after passing through the engine energy supply component 50. At the same time, the controller 20 controls the first regulating valve 64 to adjust the refrigerant flow rate in the first cooling pipeline 42 connected to the compressor 61 and the condenser 63. After the refrigerant in the water bath heat exchanger 40 completes heat exchange with the LNG, it flows into the evaporator 62 together with the refrigerant that has dissipated heat through the condenser 63 to absorb heat. After absorbing heat, the refrigerant is transported by the evaporator 62 to the compressor 61 for processing, and enters the next cycle.

[0107] In the embodiments of the present application, when a cold energy recovery is performed on an LNG vehicle, the liquid outlet pipeline of the LNG cylinder is passed through a water bath heat exchanger and connected to an engine energy supply assembly, so that the cold energy released during the gasification process of the liquid LNG is transferred to the cooling system through the water bath heat exchanger; at the same time, the cooling system connects the condenser in parallel with the water bath heat exchanger through a first regulating valve, and the controller can dynamically adjust the first regulating valve according to the signal of the engine and / or the boosting demand signal of the LNG cylinder to control the refrigerant flow ratio flowing through the water bath heat exchanger and the condenser. In the above process, the cold energy of the LNG can be fully utilized through the water bath heat exchanger, and it can be used for the refrigeration cycle of the cooling system through the controller to meet the refrigeration demand inside the vehicle, improving the cold energy recovery efficiency of the vehicle.

[0108] Based on any one of the above embodiments, hereinafter, in combination with Figure 2 , the structure of the cold energy recovery device of the vehicle will be described.

[0109] Figure 2 FIG. is a schematic structural diagram of another cold energy recovery device for a vehicle provided by an embodiment of the present application. The engine energy supply assembly 50 includes a water bath vaporizer 51 and a voltage stabilizer 52.

[0110] Among them, the input end of the water bath vaporizer 51 is connected to the output end of the liquid outlet pipeline 41; the output end of the water bath vaporizer 51 is connected to the input end of the voltage stabilizer 52; the output end of the voltage stabilizer 52 is used to be connected to the engine.

[0111] The water bath vaporizer 51 is used to gasify the LNG. In the embodiments of the present application, the water bath heat exchanger 40 can perform heat exchange on the LNG, and the water bath vaporizer 51 can continue to gasify the LNG that has not been completely gasified in the water bath heat exchanger 40 so that the gasified LNG drives the engine to operate.

[0112] The evaporator 62 includes a cab evaporator 65 and a refrigerator evaporator 66. The cooling system 60 further includes an expansion valve 67 and a second regulating valve 68.

[0113] Among them, the cab evaporator 65 and the refrigerator evaporator 66 are connected in parallel; the expansion valve 67 is respectively connected to the output end of the condenser 63 and the output end of the second cooling pipeline 43; the expansion valve 67 is also connected to the second regulating valve 68 through a pipeline; the second regulating valve 68 is also respectively connected to the cab evaporator 65 and the refrigerator evaporator 66.

[0114] The cab evaporator 65 is used to absorb the heat in the cab.

[0115] The refrigerator evaporator 66 is used to absorb the heat in the refrigerator.

[0116] The expansion valve 67 can be used to conduct or cut off the refrigerant flow into the evaporator 62 and can also be used for throttling.

[0117] The second regulating valve 68 is used to regulate the refrigerant flow in the pipeline. In the embodiment of the present application, the second regulating valve 68 is used to regulate the refrigerant flow through the cab evaporator 65 and the refrigerator evaporator 66.

[0118] The first regulating valve 64 and the second regulating valve 68 in the embodiment of the present application are three-way regulating valves.

[0119] The second cooling pipeline 43 is used to transport the refrigerant in the water bath heat exchanger 40. Specifically, the first cooling pipeline 42 includes a branch of the water bath heat exchanger 40. After the refrigerant in the first cooling pipeline 42 undergoes heat exchange in the water bath heat exchanger 40, it is output from the second cooling pipeline 43, and the second cooling pipeline 43 merges with the output pipeline of the condenser 63 into one pipeline. The refrigerant in the pipeline is regulated by the expansion valve 67 and the second regulating valve 68 in sequence.

[0120] The controller 20 is also connected to the second regulating valve 68.

[0121] Among them, the controller 20 is further used to: obtain the first temperature in the cab of the vehicle and the second temperature in the refrigerator of the vehicle; control the second regulating valve 68 and / or the compressor 61 according to the first temperature and the second temperature.

[0122] The controller 20 can control the second regulating valve 68 to regulate the refrigerant flow through the cab evaporator 65 and the refrigerator evaporator 66.

[0123] The first temperature refers to the temperature value inside the cab of the vehicle at the current moment. For example, the first temperature can be 21 degrees.

[0124] The second temperature refers to the temperature value inside the refrigerator of the vehicle at the current moment. For example, the second temperature can be -5 degrees.

[0125] In the actual application process, temperature sensors can be set inside the cab and inside the refrigerator. Correspondingly, the temperature values inside the cab and inside the refrigerator can be periodically collected through the temperature sensors.

[0126] The second regulating valve 68 and / or the compressor 61 can be controlled in the following manner: obtain the first temperature in the cab of the vehicle and the second temperature in the refrigerator of the vehicle; determine the first temperature threshold and the second temperature threshold, where the first temperature threshold is less than the second temperature threshold; control the second regulating valve 68 and / or the compressor 61 according to the first temperature threshold, the second temperature threshold, and the first temperature.

[0127] Among them, if the first temperature is less than or equal to the first temperature threshold, it indicates that the current temperature in the cab has reached or fallen below the preset temperature. Then, the controller 20 controls the second regulating valve 68 to reduce the refrigerant flow rate through the cab evaporator 65. If the first temperature is greater than the first temperature threshold and less than the second temperature threshold, it indicates that the temperature in the cab is within the normal temperature range but has not reached the ideal low temperature. Then, the controller 20 controls the second regulating valve 68 to increase the refrigerant flow rate through the cab evaporator 65 and controls the compressor 61, specifically to start or increase the rotational speed of the compressor 61. If the first temperature is greater than or equal to the second temperature threshold, it indicates that the temperature in the cab is too high. Then, the controller 20 controls the second regulating valve 68 to increase the refrigerant flow rate through the cab evaporator 65 and controls the compressor 61, specifically to start or increase the rotational speed of the compressor 61.

[0128] In the embodiment of the present application, the compressor can be controlled according to the preset gear. For example, the preset gears can include low gear, medium gear, and high gear. If the first temperature is greater than or equal to the second temperature threshold, the gear of the compressor can be adjusted to the high gear to quickly increase the rotational speed of the compressor.

[0129] Optionally, the second regulating valve 68 and / or the compressor 61 can be controlled according to the second temperature, the third temperature threshold, and the fourth temperature threshold of the refrigerator in the vehicle to adjust the refrigerant flow rate through the refrigerator evaporator 66. Among them, the third temperature threshold is less than the fourth temperature threshold, and the implementation principle is similar to the above method and will not be elaborated here.

[0130] In the actual application process, if the temperatures of both the cab evaporator 65 and the refrigerator evaporator 66 are lower than the preset temperature, the control priority can be determined according to the respective temperature deviations of the cab evaporator 65 and the refrigerator evaporator 66.

[0131] The temperature deviation refers to the difference between the temperature at the current moment and the preset temperature threshold.

[0132] For example, assume that the first temperature of the cab evaporator 65 is less than the first temperature threshold, and the second temperature of the refrigerator evaporator 66 is less than the third temperature threshold. Among them, the temperature deviation of the cab evaporator 65 is larger. Then, the controller 20 can preferentially control the second regulating valve 68 and / or the compressor 61 according to the first temperature of the cab evaporator 65.

[0133] The controller 20 is further configured to: receive the reverse drag signal of the engine; according to the reverse drag signal, send a second control instruction to the first regulating valve 64, and the second control instruction is used to control the reduction of the opening ratio between the first regulating valve 64 and the first cooling pipeline 42 and control the increase of the opening ratio between the first regulating valve 64 and the condenser 63.

[0134] The reverse-dragging signal is used to indicate a signal generated when the engine is driven in reverse by the vehicle's drive wheels (for example, during a long downhill, etc.).

[0135] During actual application, when the controller 20 receives the reverse-dragging signal of the engine, the LNG cylinder 30 does not output LNG outward, that is, the opening ratio of the first cooling pipeline 42 communicating with the water-bath heat exchanger 40 can be reduced. Correspondingly, the opening ratio between the first regulating valve 64 and the condenser 63 is increased.

[0136] For example, the opening ratio between the first regulating valve 64 and the first cooling pipeline 42 can be reduced to 5%, and the opening ratio between the first regulating valve 64 and the condenser 63 can be increased to 95%.

[0137] It should be noted that when the controller 20 receives the reverse-dragging signal of the engine and also receives the boosting signal of the LNG cylinder 30, the opening ratio between the first regulating valve 64 and the first cooling pipeline 42 can be appropriately adjusted according to actual needs. For example, the opening ratio can be increased from 5% to 15%.

[0138] In the embodiment of the present application, when the LNG vehicle performs cold energy recovery, the cooling system connects the cab evaporator and the refrigerator evaporator in parallel through the second regulating valve. The controller can dynamically adjust the second regulating valve and / or the compressor according to the first temperature of the cab evaporator and / or the second temperature of the refrigerator evaporator, and control the refrigerant flow ratio flowing through the cab evaporator and the refrigerator evaporator. In the above process, the controller can control the second regulating valve according to the temperature signal to adjust the refrigerant flow ratio of the devices in the cooling system, so as to meet the refrigeration requirements inside the vehicle and improve the cold energy recovery efficiency of the vehicle.

[0139] Based on any one of the above embodiments, below, in combination with Figure 3 , the structure of the cold energy recovery device of the vehicle will be described.

[0140] Figure 3 This is a schematic structural diagram of another cold energy recovery device of the vehicle provided by the embodiment of the present application. Please refer to Figure 3 , the cold energy recovery device 10 of the vehicle further includes a first boosting pipeline 44, a second boosting pipeline 45, an air-bath vaporizer 70, and a pressure regulating valve 80, where

[0141] The first boosting pipeline 44 is used to transport the liquid LNG in the LNG cylinder 30.

[0142] The second boosting pipeline 45 is used to transport LNG to the LNG cylinder 30.

[0143] The air-bath vaporizer 70 can further vaporize the LNG that has not been completely vaporized in the water-bath heat exchanger 40.

[0144] The pressure regulating valve 80 is used to regulate the pressure state in the second boosting pipeline 45.

[0145] The first boosting pipeline 44 is arranged in the water-bath heat exchanger 40, and the part of the first boosting pipeline 44 arranged in the water-bath heat exchanger 40 is spiral; the first boosting pipeline 44 is respectively connected with the output end of the LNG gas cylinder 30 and the input end of the air-bath vaporizer 70.

[0146] The first boosting pipeline 44 includes a boosting pipeline a440 and a boosting pipeline b441, that is, the boosting pipeline a440 is connected with the output end of the LNG gas cylinder 30, and the boosting pipeline b441 is connected with the input end of the air-bath vaporizer 70.

[0147] Next, in combination with Figure 4 , through specific examples, the connection structures of the water-bath heat exchanger 40, the liquid outlet pipeline 41, the first boosting pipeline 44, the first cooling pipeline 42 and the second cooling pipeline 43 will be described.

[0148] Figure 4 The following is a schematic diagram of the connection structure of the water-bath heat exchanger provided by the embodiment of the present application. Please refer to Figure 4 , the liquid outlet pipeline 41 and the first boosting pipeline 44 are respectively arranged in the water-bath heat exchanger 40. The part of the pipeline of the liquid outlet pipeline 41 located in the water-bath heat exchanger 40 is spiral.

[0149] Among them, the liquid outlet pipeline 41 includes a liquid outlet pipeline a410 and a liquid outlet pipeline b411, that is, the liquid outlet pipeline a410 is communicated with the inlet of the water-bath heat exchanger 40, and the liquid outlet pipeline b411 is communicated with the outlet of the water-bath heat exchanger 40.

[0150] The first boosting pipeline 44 includes a boosting pipeline a440 and a boosting pipeline b441, that is, the boosting pipeline a440 is communicated with the inlet of the water-bath heat exchanger 40, and the boosting pipeline b441 is communicated with the outlet of the water-bath heat exchanger 40.

[0151] The first cooling pipeline 42 is communicated with the outlet of the water-bath heat exchanger 40, and the second cooling pipeline 43 is communicated with the inlet of the water-bath heat exchanger 40, that is, after the refrigerant flows through the water-bath heat exchanger 40 from the first cooling pipeline 42 for heat exchange, it is output to the second cooling pipeline 43.

[0152] The second boosting pipeline 45 is respectively connected with the output end of the air-bath vaporizer 70 and the input end of the LNG gas cylinder 30, and the pressure regulating valve 80 is arranged on the second boosting pipeline 45.

[0153] The controller 20 is also connected with the pressure regulating valve 80.

[0154] Among them, the controller 20 is further configured to: obtain the pressure value of the LNG cylinder 30; and adjust the pressure regulating valve 80 according to the pressure value of the LNG cylinder 30.

[0155] In the actual application process, a pressure sensor may be disposed inside the LNG cylinder 30, and the pressure sensor is used to detect the pressure value inside the LNG cylinder 30.

[0156] In the embodiment of the present application, by passing the first boosting pipeline through the water bath heat exchanger, the water bath heat exchanger can perform heat exchange treatment on the LNG in the first boosting pipeline, and by providing an air bath vaporizer, the LNG that is not completely vaporized in the water bath heat exchanger can be vaporized, and then returned to the LNG cylinder through the pressure regulating valve and the second boosting pipeline. During the above process, the LNG in the liquid outlet pipeline and the boosting pipeline can be utilized simultaneously or separately, so that the LNG cold energy generated when the LNG cylinder supplies gas and boosts is fully utilized, resource consumption is reduced, and the cold energy recovery efficiency of the vehicle is improved.

[0157] Next, in combination with Figure 5 , the working process of the controller will be described.

[0158] Figure 5 FIG. is a schematic diagram of the working process of the controller provided by the embodiment of the present application. Please refer to Figure 5 , the controller 20 can receive an engine torque increase signal and / or a boosting signal of the LNG cylinder, and control the first regulating valve 64 according to the received signal. Specifically, it controls to increase the opening ratio between the first regulating valve 64 and the first cooling pipeline 42, and controls to decrease the opening ratio between the first regulating valve 64 and the condenser 63.

[0159] The controller 20 can receive the temperature signal (the first temperature) of the cab evaporator 65 and the temperature signal (the second temperature) of the refrigerator evaporator 66, and control the second regulating valve 68 and / or the compressor 61 according to the received first temperature and second temperature.

[0160] The controller 20 can further receive the engine reverse drag signal, and control the first regulating valve 64 according to the received reverse drag signal. Specifically, it controls to decrease the opening ratio between the first regulating valve 64 and the first cooling pipeline 42, and controls to increase the opening ratio between the first regulating valve 64 and the condenser 63.

[0161] It should be noted that the signals received by the controller 20 from the engine, the LNG cylinder 30, the cab evaporator 65, and the refrigerator evaporator 66 can be executed in parallel or sequentially.

[0162] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A vehicle cold recovery device, characterized in that: It includes a controller, a liquefied natural gas (LNG) cylinder, a water bath heat exchanger, an engine power supply component, a cooling system, a liquid outlet pipeline, a first cooling pipeline and a second cooling pipeline, wherein: The liquid outlet pipeline is arranged in the water bath heat exchanger, one end of the liquid outlet pipeline is connected to the LNG cylinder, and the other end of the liquid outlet pipeline is connected to the engine power supply component, and the engine power supply component is also used to connect to the engine of the vehicle to deliver gasified natural gas to the engine; The cooling system comprises a compressor, an evaporator, and a condenser, wherein the compressor is connected to the first cooling pipeline and the condenser through a first regulating valve, the evaporator is connected to the compressor and the condenser respectively, and the first cooling pipeline is also connected to the water bath heat exchanger; The controller is connected to the first regulating valve, and the controller is used to adjust the first regulating valve according to the signal of the engine and / or the signal of the LNG cylinder.

2. The device according to claim 1, characterized in that The engine energy supply assembly includes a water bath gasifier and a voltage stabilizer, wherein: The input end of the water bath type vaporizer is connected to the output end of the liquid outlet pipeline; The output end of the water bath vaporizer is connected to the input end of the voltage stabilizer; The output end of the voltage stabilizer is used to be connected to the engine.

3. The device according to claim 1 or 2, characterized in that The evaporator includes a cab evaporator and a refrigerator evaporator, and the cooling system also includes an expansion valve and a second regulating valve, wherein: The cab evaporator and the refrigerator evaporator are connected in parallel; The expansion valve is respectively connected to the output end of the condenser and the output end of the second cooling pipeline; The expansion valve is also connected to the second regulating valve through a pipeline; The second regulating valve is also connected to the cab evaporator and the refrigerator evaporator respectively.

4. The device according to claim 3, characterized in that The controller is also connected to the second regulating valve, wherein the controller is further used for: Acquiring a first temperature of a cab in the vehicle and a second temperature of a refrigerator in the vehicle; The second regulating valve and / or the compressor are controlled according to the first temperature and the second temperature.

5. The device according to any one of claims 1 to 4, characterized in that: The device also includes a first boosting pipeline, a second boosting pipeline, an air bath gasifier and a pressure regulating valve, wherein: The first boosting pipeline is arranged in the water bath heat exchanger, and a portion of the first boosting pipeline arranged in the water bath heat exchanger is spiral-shaped; The first boosting pipeline is connected to the output end of the LNG cylinder and the input end of the air bath type vaporizer respectively; The second boosting pipeline is connected to the output end of the air bath vaporizer and the input end of the LNG cylinder respectively, and the pressure regulating valve is arranged on the second boosting pipeline; The controller is also connected to the pressure regulating valve.

6. The device according to claim 5, characterized in that The controller is also used for: Obtaining the pressure value of the LNG cylinder; The pressure regulating valve is adjusted according to the pressure value of the LNG cylinder.

7. The device according to any one of claims 1 to 6, characterized in that: The controller is specifically used for: receiving a torque increase signal from the engine and / or a pressure increase signal from the LNG cylinder; According to the torque increase signal and / or the boost signal, a first control instruction is sent to the first regulating valve, and the first control instruction is used to control an increase in the opening ratio between the first regulating valve and the first cooling pipeline, and to control a decrease in the opening ratio between the first regulating valve and the condenser.

8. The device according to any one of claims 1 to 6, characterized in that: The controller is also used for: receiving a reverse drag signal of the engine; According to the reverse drag signal, a second control instruction is sent to the first regulating valve, and the second control instruction is used to control the reduction of the opening ratio between the first regulating valve and the first cooling pipeline, and control the increase of the opening ratio between the first regulating valve and the condenser.

9. The device according to any one of claims 1 to 8, characterized in that: The portion of the liquid outlet pipeline located in the water bath heat exchanger is spiral-shaped.

10. A vehicle, characterized in that: A cold energy recovery device for a vehicle comprising the device described in any one of claims 1 to 9.

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