Air conditioning system and vehicle having the same

Abstract

The application provides an air conditioning system and a vehicle with the same, which comprises a diesel engine assembly and an indoor heat exchanger, the diesel engine assembly comprises a cooling system and a diesel engine body, the cooling system has a cooling medium therein and is used for cooling the diesel engine body; the indoor heat exchanger is in communication with the cooling system; when the air conditioning system heats the indoor, the cooling medium after heat exchange with the diesel engine body can enter the indoor heat exchanger to heat the indoor. According to the air conditioning system, energy consumption is small, and air conditioning effect is good.

Description

Technical Field

[0001] This application belongs to the field of vehicle technology, specifically relating to an air conditioning system and a vehicle having the same. Background Technology

[0002] Currently, with the rapid development of the transportation industry, electric parking air conditioners, as an energy-saving and environmentally friendly new type of air conditioner, have become the first choice for many truck drivers to solve the problem of heat during rest periods. However, electric parking air conditioners have many problems, such as limited cooling and heating capacity due to battery power, complex dual-system structure, and potential violations when modifying the vehicle's appearance. Therefore, electric parking air conditioners have not been widely adopted in trucks. Therefore, it is necessary to design an integrated onboard air conditioner that combines driving and parking functions to solve these problems.

[0003] Previously, cars were merely a means of transportation, so there was no need to install integrated driving and parking air conditioning. However, with the rise of the transportation and ride-hailing industries, more and more drivers need to rest or even spend the night in their cars, making integrated driving and parking air conditioning a hot topic. Among related technologies, vehicle compressor-based air conditioning systems consume a lot of energy and have poor air conditioning effects.

[0004] Therefore, how to provide an air conditioning system with low energy consumption and good air conditioning effect, as well as a vehicle equipped with it, has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] Therefore, the technical problem to be solved by this application is to provide an air conditioning system and a vehicle having the same, which has low energy consumption and good air conditioning effect.

[0006] To address the aforementioned problems, this application provides an air conditioning system, comprising:

[0007] A diesel engine assembly includes a cooling system and a diesel engine body. The cooling system contains a cooling medium and is used to cool the diesel engine body.

[0008] The indoor heat exchanger is connected to the cooling system; when the air conditioning system heats the room, the cooling medium that has exchanged heat with the diesel engine can enter the indoor heat exchanger to heat the room.

[0009] Furthermore, the cooling system includes cooling pipes and a cooling heat exchanger. The cooling heat exchanger is connected to the cooling pipes and is used to exchange heat with the cooling medium in the cooling pipes to cool the cooling medium.

[0010] Furthermore, the cooling system also includes a bypass pipeline, which is connected in parallel with the cooling heat exchanger on the cooling pipeline. A flow control valve is installed on the bypass pipeline, which can control the flow rate of the cooling medium flowing through the bypass pipeline to regulate the temperature of the cooling medium in the cooling system.

[0011] Further, when the air-conditioning system cools the indoor environment, when T > T1, control the opening degree of the flow control valve to decrease; and / or, when the air-conditioning system cools the indoor environment, when T < T1, control the opening degree of the flow control valve to increase; where T is the temperature of the cooling medium after heat exchange with the diesel engine body, and T1 is the first preset temperature.

[0012] Further, the air-conditioning system further includes a first control valve, and the first control valve can control the connection or disconnection between the indoor heat exchanger and the cooling system; when the air-conditioning system heats the indoor environment, when T > T2, control the first control valve to open, so that the indoor heat exchanger is connected to the cooling system, and then the cooling medium after heat exchange with the diesel engine body enters the indoor heat exchanger to heat the indoor environment;

[0013] and / or, when the air-conditioning system heats the indoor environment, when T ≤ T2, control the first control valve to close, so that the cooling medium after heat exchange with the diesel engine body continues to flow in the cooling system; where T2 is the second preset temperature.

[0014] Further, when the air-conditioning system heats the indoor environment, when T ≤ T2 and the first control valve is controlled to close, control the opening degree of the flow control valve to increase.

[0015] Further, the air-conditioning system further includes a compressor assembly, a four-way valve, a throttling component, and an outdoor heat exchanger; the four-way valve has ports A, B, C, and D; the outlet of the compressor assembly is connected to port A; port B is connected to the inlet of the compressor assembly; port C is connected to the first port of the indoor heat exchanger; port D is connected to the first port of the outdoor heat exchanger; the second port of the indoor heat exchanger, the throttling component, and the second port of the outdoor heat exchanger are connected in sequence; the air-conditioning system further includes an unloading pipeline, the first pipe opening of the unloading pipeline is connected between port A and the outlet of the compressor assembly, the second pipe opening of the unloading pipeline is connected between port B and the inlet of the compressor assembly, and an unloading valve is provided on the unloading pipeline, and the unloading valve is used to control the on-off of the unloading pipeline.

[0016] Further, the air-conditioning system further includes a speed sensor, and the speed sensor can detect the rotational speed of the diesel engine main shaft; the air-conditioning system further includes a control system, and the control system can control the air-conditioning system to enter the parking mode or the driving mode according to the rotational speed of the diesel engine main shaft.

[0017] Further, the compressor assembly includes a mechanical compressor and an electric compressor arranged in parallel; the diesel engine body includes a diesel engine main shaft, and the mechanical compressor is connected to the diesel engine main shaft; the diesel engine main shaft can drive the mechanical compressor to operate, so that the indoor heat exchanger heats or cools; the electric compressor is connected to the battery, and the battery can drive the electric compressor to operate, so that the indoor heat exchanger heats or cools.

[0018] Further, when the air-conditioning system is in the driving mode, the main shaft of the diesel engine can drive the mechanical compressor to operate, so that the indoor heat exchanger can heat or cool.

[0019] And / or, when the air-conditioning system is in the parking mode, the electric compressor is connected to the battery, and the battery can drive the electric compressor to operate, so that the indoor heat exchanger can heat or cool.

[0020] And / or, when H < H1, the air-conditioning system is controlled to enter the parking mode.

[0021] And / or, when H ≥ H1, the air-conditioning system is controlled to enter the driving mode; where H is the rotational speed of the main shaft of the diesel engine; H1 is the first preset rotational speed.

[0022] Further, the air-conditioning system further has an anti-freezing mode; in the parking mode, when the indoor heat exchanger heats the room, the cooling medium in the cooling system can enter the indoor heat exchanger and exchange heat with the refrigerant in the indoor heat exchanger, so as to prevent the cooling medium in the cooling system from being heated.

[0023] Further, the indoor heat exchanger includes a first heat exchange tube and a second heat exchange tube. The first heat exchange tube is provided with a refrigerant, and the second heat exchange tube is connected to the cooling system.

[0024] According to another aspect of the present application, a vehicle is provided, including an air-conditioning system, and the air-conditioning system is the above-mentioned air-conditioning system.

[0025] The air-conditioning system provided by the present application and the vehicle having the same have low energy consumption and good air-conditioning effect. Brief Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of the air-conditioning system according to an embodiment of the present application;

[0027] Figure 2 It is a schematic structural diagram of the indoor heat exchanger according to an embodiment of the present application;

[0028] Figure 3 It is a schematic structural diagram of the indoor heat exchanger according to an embodiment of the present application;

[0029] Figure 4 It is a schematic structural diagram of the air-conditioning system according to an embodiment of the present application;

[0030] Figure 5 It is a drive system diagram of the air-conditioning system according to an embodiment of the present application.

[0031] The reference numerals are shown as:

[0032] 1. Diesel engine assembly; 11. Diesel engine block; 12. Cooling system; 13. Cooling heat exchanger; 131. Cooling fan; 14. Bypass pipeline; 141. Flow control valve; 15. Cooling pump; 16. Temperature sensor; 17. Storage device; 2. Indoor heat exchanger; 21. Indoor fan; 221. First control valve; 222. Second control valve; 231. First heat exchange tube; 232. Second heat exchange tube; 3. Compressor assembly; 31. Mechanical compressor; 311. Third control valve; 32. Electric compressor; 321. Fourth control valve; 41. Four-way valve; 42. Throttling component; 43. Outdoor heat exchanger; 431. Outdoor fan; 44. Unloading valve; 45. Oil-water separator; 46. Gas-liquid separator; 47. Check valve; 48. Fifth control valve. Detailed Implementation

[0033] See also Figure 1-5 As shown, an air conditioning system includes a diesel engine assembly 1 and an indoor heat exchanger 2. The diesel engine assembly 1 includes a cooling system 12 and a diesel engine body 11. The cooling system 12 contains a cooling medium and is used to cool the diesel engine body 11. The indoor heat exchanger 2 is connected to the cooling system 12. When the air conditioning system heats the room, the cooling medium, after exchanging heat with the diesel engine body 11, can enter the indoor heat exchanger 2 to provide heat to the room. This application can fully utilize the waste heat generated by the diesel engine, resulting in low energy consumption and good air conditioning effect. Furthermore, the cooling system 12 cools the cylinders of the diesel engine.

[0034] This application also discloses some embodiments. The cooling system 12 includes cooling pipes and a cooling heat exchanger 13. The cooling heat exchanger 13 is connected to the cooling pipes and is used to exchange heat with the cooling medium in the cooling pipes to cool the cooling medium. The cooling system 12 also includes a storage device 17, which is further a cooling tank. The cooling medium is coolant. The storage device 17 is connected to the cooling pipes, and a one-way valve 47 is provided between the cooling pipes and the storage device 17, that is, the cooling medium in the storage device 17 can only flow out and then enter the cooling pipes, while the cooling medium in the cooling pipes cannot enter the storage device 17. The temperature of the cooling medium flowing through the diesel engine in the cooling pipes can be regulated by the cooling heat exchanger 13. A cooling fan 131 is provided corresponding to the cooling heat exchanger 131.

[0035] The present application also discloses some embodiments. The cooling system 12 further includes a bypass pipeline 14, which is arranged in parallel with the cooling heat exchanger 13 on the cooling pipeline. A flow control valve 141 is provided on the bypass pipeline 14, and the flow control valve 141 can control the flow rate of the cooling medium flowing through the bypass pipeline 14 to adjust the temperature of the cooling medium in the cooling system 12. Through the cooperation of the bypass pipeline 14 and the cooling heat exchanger 13, the temperature of the cooling medium flowing through the diesel engine in the cooling pipeline can be adjusted more accurately; when the temperature of the cooling medium flowing out of the cooling pipeline is relatively low, the opening degree of the flow control valve 141 can be increased, so that more cooling medium flows into the bypass pipeline 14 and less cooling medium flows into the cooling heat exchanger 13, so that the temperature of the cooling medium will not be too low and affect the performance of the diesel engine; when the temperature of the cooling medium flowing out of the cooling pipeline is relatively high, the opening degree of the flow control valve 141 can be reduced, so that less cooling medium flows into the bypass pipeline 14 and more cooling medium flows into the cooling heat exchanger 13 for cooling, so that the temperature of the cooling medium can be better reduced and the cooling effect of the cooling medium on the diesel engine body 11 can be improved. The present application can control the temperature of the diesel engine cylinder coolant.

[0036] The present application also discloses some embodiments. When the air conditioning system cools the room and T>T1, the opening degree of the flow control valve 141 is controlled to decrease; that is, when the air conditioning system cools the room and the temperature of the cooling medium after heat exchange with the diesel engine body 11 is relatively high, the opening degree of the flow control valve 141 is controlled to decrease, so that less cooling medium flows into the bypass pipeline 14 and more cooling medium flows into the cooling heat exchanger 13 for cooling, so that the temperature of the cooling medium can be better reduced and the cooling effect of the cooling medium on the diesel engine body 11 can be improved.

[0037] The present application also discloses some embodiments. When the air conditioning system cools the room and T<T1, the opening degree of the flow control valve 141 is controlled to increase; where T is the temperature of the cooling medium after heat exchange with the diesel engine body 11, and T1 is the first preset temperature. That is, when the air conditioning system cools the room and the temperature of the cooling medium after heat exchange with the diesel engine body 11 is relatively low, the opening degree of the flow control valve 141 is controlled to increase, so that more cooling medium flows into the bypass pipeline 14 and less cooling medium flows into the cooling heat exchanger 13 for cooling, so that more cooling medium flows into the bypass pipeline 14 and less cooling medium flows into the cooling heat exchanger 13, so that the temperature of the cooling medium will not be too low and affect the performance of the diesel engine.

[0038] The cooling system 12 further includes a cooling pump 15. The regulating pipeline is arranged on the cooling pipeline, and both the cooling pump 15 and the storage device 17 are arranged on the cooling pipeline; the bypass pipeline is arranged in parallel with the cooling heat exchanger

[0036] on the cooling pipeline to form a regulating pipeline.

[0039] This application also discloses some embodiments. The air conditioning system further includes a first control valve 221, which can control the connection or disconnection between the indoor heat exchanger 2 and the cooling system 12. When the air conditioning system heats the room, when T>T2, the first control valve 221 is opened to connect the indoor heat exchanger 2 and the cooling system 12, thereby allowing the cooling medium after heat exchange with the diesel engine body 11 to enter the indoor heat exchanger 2 to heat the room. That is, when the temperature of the cooling medium after heat exchange with the diesel engine body 11 is high, it can enter the indoor heat exchanger 2 to heat the room. The cooling system 12 is connected to the inlet of the indoor heat exchanger 2 through an inlet pipe, and the first control valve 221 is installed on the inlet pipe. The cooling system 12 is connected to the outlet of the indoor heat exchanger 2 through an outlet pipe, and a second control valve 222 is installed on the outlet pipe to allow the cooling medium after heat exchange with the indoor heat exchanger 2 to flow back into the cooling system 12.

[0040] This application also discloses some embodiments in which, when the air conditioning system heats the room, when T≦T2, the first control valve 221 is closed, allowing the cooling medium after heat exchange with the diesel engine body 11 to continue flowing in the cooling system 12; wherein, T2 is the second preset temperature. That is, when the temperature of the cooling medium after heat exchange with the diesel engine body 11 is low, it can continue to flow in the cooling system 12 to cool and lower the diesel engine body 11 until its temperature rises to the second preset temperature, and then the first control valve 221 is opened to connect the indoor heat exchanger 2 with the cooling system 12, thereby allowing the cooling medium after heat exchange with the diesel engine body 11 to enter the indoor heat exchanger 2 to heat the room.

[0041] This application also discloses some embodiments in which, when the air conditioning system is heating the room, when T≦T2, the opening of the flow control valve 141 is increased when the first control valve 221 is closed. That is, when the air conditioning system is heating, if the temperature of the cooling medium after heat exchange with the diesel engine body 11 is low, the opening of the flow control valve 141 can be increased to allow more cooling medium to flow into the bypass pipe 14 and less cooling medium to flow into the cooling heat exchanger 13 for cooling. This prevents the temperature of the cooling medium from being too low and affecting the performance of the diesel engine. It also allows the cooling medium to continue flowing in the cooling system 12 to further exchange heat with the diesel engine body 11. When the temperature of the cooling medium increases to the second preset temperature, the first control valve 221 is opened to connect the indoor heat exchanger 2 with the cooling system 12, thereby allowing the cooling medium after heat exchange with the diesel engine body 11 to enter the indoor heat exchanger 2 to heat the room.

[0042] This application also discloses some embodiments, in which the air conditioning system further includes a compressor assembly 3, a four-way valve 41, a throttling component 42, and an outdoor heat exchanger 43; the four-way valve 41 has an A port, a B port, a C port, and a D port; the outlet of the compressor assembly 3 is connected to the A port; the B port is connected to the inlet of the compressor assembly 3; the C port is connected to the first port of the indoor heat exchanger 2; the D port is connected to the first port of the outdoor heat exchanger 43; the second port of the indoor heat exchanger 2, the throttling component 42, and the second port of the outdoor heat exchanger 43 are connected in sequence; the air conditioning system also includes an unloading pipeline, the first port of the unloading pipeline is connected between the A port and the outlet of the compressor assembly 3, the second port of the unloading pipeline is connected between the B port and the inlet of the compressor assembly 3, and an unloading valve 44 is provided on the unloading pipeline for controlling the opening and closing of the unloading pipeline. The air conditioning system of this application also includes an oil-water separator 45 and a gas-liquid separator 46. The oil-water separator 45 is connected between the outlet of the compressor assembly 3 and the first port of the unloading pipeline. The gas-liquid separator 46 is connected between the inlet of the compressor assembly 3 and a manifold. The first end of the manifold is connected to the inlet of the compressor assembly 3, and the second end of the manifold is connected to the connection position between the second port of the unloading pipeline and port B. The gas-liquid separator 46 is installed on the manifold. A one-way valve 47 is connected between the oil-water separator 45 and the first port of the unloading pipeline. A solenoid valve is connected between the second end of the manifold and the connection position between the second port of the unloading pipeline and port B. The indoor heat exchanger 2 and the outdoor heat exchanger 43 are respectively equipped with an indoor fan 21 and an outdoor fan 431. The function of the unloading valve 44 is to open when the refrigerant pressure in the air conditioner is too high, so that the refrigerant does not enter the evaporator, condenser and other components, but returns directly to the compressor, preventing damage to the components due to excessive pressure. The outlet of compressor assembly 3 is connected to port A via a connecting pipe, and a fifth control valve 48 is installed on the connecting pipe. The fifth control valve 48 is a solenoid valve.

[0043] This application also discloses some embodiments, in which the air conditioning system further includes a speed sensor capable of detecting the rotational speed of the diesel engine spindle; the air conditioning system also includes a control system capable of controlling the air conditioning system to enter parking mode or driving mode based on the rotational speed of the diesel engine spindle. A speed detection device is further provided on the diesel engine spindle, and more specifically, the speed detection device is a speed sensor.

[0044] The present application also discloses some embodiments. The compressor assembly 3 includes a mechanical compressor 31 and an electric compressor 32 which are arranged in parallel. The diesel engine body 11 includes a diesel engine main shaft, and the mechanical compressor 31 is connected to the diesel engine main shaft. The diesel engine main shaft can drive the mechanical compressor 31 to operate so that the indoor heat exchanger 2 heats or cools. The electric compressor 32 is connected to a battery, and the battery can drive the electric compressor 32 to operate so that the indoor heat exchanger 2 heats or cools. The present application uses a controllable electric compressor 32 and a mechanical compressor 31 to supply energy to the air-conditioning system, and performs precise coordination of the dual-compressor system, enabling the switching between driving and parking modes. The mechanical compressor 31 is arranged on a mechanical pipeline, and the electric compressor 32 is arranged on an electric pipeline. The electric pipeline and the mechanical pipeline are arranged in parallel, and a third control valve is arranged on the mechanical pipeline, and a fourth control valve is arranged on the electric pipeline. The third control valve is a solenoid valve, and the fourth control valve is a solenoid valve. Both the third control valve and the fourth control valve are arranged on the pipeline on the inlet side of the compressor, and a check valve 47 is arranged on the pipeline on the outlet side of the electric compressor 32.

[0045] The present application also discloses some embodiments. The compressor assembly 3 is a dual-drive compressor, which can save the space and cost of one compressor. The dual-drive compressor is formed by a mechanical compressor 31 and an electric compressor 32.

[0046] The present application also discloses some embodiments. When the air-conditioning system is in the driving mode, the diesel engine main shaft can drive the mechanical compressor 31 to operate so that the indoor heat exchanger 2 heats or cools;

[0047] And / or, when the air-conditioning system is in the parking mode, the electric compressor 32 is connected to a battery, and the battery can drive the electric compressor 32 to operate so that the indoor heat exchanger 2 heats or cools;

[0048] And / or, when H < H1, control the air-conditioning system to enter the parking mode;

[0049] And / or, when H ≧ H1, control the air-conditioning system to enter the driving mode; where H is the rotational speed of the diesel engine main shaft; H1 is a first preset rotational speed.

[0050] The present application can control the operating state of the air-conditioning system according to the rotational speed of the main shaft.

[0051] In the present application, during the driving mode, heat is mainly supplied by the coolant; during the parking mode, the waste heat of the cylinder coolant is fully utilized. In addition, when the heat is insufficient, the battery is used to supply power to drive the heat pump air conditioner.

[0052] This application also discloses some embodiments, in which the air conditioning system also has an antifreeze mode; in the parking mode, when the indoor heat exchanger 2 heats the room, the cooling medium in the cooling system 12 can enter the indoor heat exchanger 2 and exchange heat with the refrigerant in the indoor heat exchanger 2 to prevent the cooling medium in the cooling system 12 from being heated, that is, by using the cylinder coolant and refrigerant heat exchange method, the cylinder is warmed up in winter, which can prevent the cooling medium from freezing and affecting the performance of the diesel engine.

[0053] This application also discloses some embodiments, in which the indoor heat exchanger 2 includes a first heat exchange tube 231 and a second heat exchange tube 232. The first heat exchange tube 231 contains refrigerant, and the second heat exchange tube 232 is connected to the cooling system 12. Using refrigerant as the cooling medium for the diesel engine can prevent leakage and cross-contamination between the refrigerant and the cooling medium in the indoor heat exchanger 2, but their physical properties may differ significantly. Replacing the double-layered tube with a two-tube single-surface heat exchange system can reduce process difficulty, but the heat exchange effect is poor, making it difficult to fully utilize the waste heat from the diesel engine.

[0054] This application adopts an integrated air conditioning system, which saves nearly one-third of the cost of condensers, evaporators and their piping fittings compared to the popular external parking air conditioners on the market. At the same time, under heating conditions, it utilizes the waste heat of cylinder cooling water to increase the heating capacity, saving nearly 2 liters of fuel per 100 kilometers.

[0055] This application adopts a mechanical compressor 31, an electric compressor 32, an oil-water separator 45, a gas-liquid separator 46, an external fan, an internal fan, a heat exchanger, a temperature sensor 16, a cooling water pump, various valves and pipelines, and combines them with a diesel engine and a battery to form a complete vehicle-mounted air conditioning system that integrates driving and parking modes. The internal and external fans are powered by the battery, the external fan is driven by the main shaft, and the cooling water pump is driven by the diesel engine main shaft in driving mode and by electric drive in parking mode.

[0056] When the driver activates the cooling mode on the vehicle's central control screen, neither the first control valve 221 nor the second control valve 222 is energized or disconnected. The diesel engine cooling medium does not enter the indoor heat exchanger 2. The air conditioning system and the diesel engine cooling system 12 are two independent systems. Only the refrigerant flows and exchanges heat in the indoor heat exchanger 2; the cooling medium does not participate. The diesel engine spindle speed sensor feeds back the speed signal to the drive main board. If the speed is not zero, the drive board controls the activation of the driving mode, the electromagnetic clutch is energized and engaged, and the mechanical compressor 31 is driven by the pulley. The solenoid valve 11 is de-energized and in an open circuit state, while the solenoid valve 21 is energized and engaged, connecting the air conditioning system, which is driven by the mechanical compressor 31 for cooling. Simultaneously, the cooling water pump is driven by the spindle, and the cooling medium flows to the diesel engine cylinders for cooling. The temperature sensor 16 monitors the cooling medium outlet temperature. When it exceeds the set temperature (generally set to 70℃-80℃), the flow control valve 141 closes, allowing more cooling medium to flow through the cooling heat exchanger 13, preventing overheating. Excessive medium temperature causes insufficient cylinder cooling, exacerbating cylinder wear and other malfunctions. Conversely, when the outlet temperature is lower than the set temperature, the flow control valve 141 opens wider under the control of the drive board, maintaining the temperature of the cooling medium flowing through the diesel engine cylinder at a certain value, preventing increased cylinder heat loss and low-temperature corrosion caused by low cooling medium temperature. If the feedback speed signal is zero, the drive board controls the parking mode to be activated, the electromagnetic clutch is de-energized and disengaged, the electric compressor 32 operates in the car battery powered mode, the solenoid valve 11 is energized and engaged, the solenoid valve 21 is de-energized and opened, the air conditioning system is driven by the electric compressor 32 to run cooling, the cooling water pump stops, and the diesel engine cooling system 12 is not running.

[0057] When the driver activates the heating mode on the vehicle's central control screen, the diesel engine spindle speed sensor sends a speed signal to the drive main board. If the speed is not zero, the drive board activates the driving mode, the coolant pump runs, and temperature sensor 16 monitors the outlet temperature of the cooling medium. When the temperature exceeds the set temperature (generally set to 70℃-80℃), the first control valve 221 and the second control valve 222 are energized, the electromagnetic clutch is de-energized, and the solenoid valve 11 is also de-energized. The indoor heat exchanger 2 only provides heating under the condition of diesel engine coolant heat exchange. At the same time, the flow control valve 141 adjusts its opening according to the temperature, so that... The temperature is maintained within the set temperature range to ensure the normal operation of the diesel engine. This is generally the case when the vehicle is in long-term driving. When the monitored temperature is lower than the set temperature, neither the first control valve 221 nor the second control valve 222 is energized and disconnected. The flow control valve 141 increases its opening to increase the temperature of the circulating cooling medium. At the same time, the electromagnetic clutch is engaged, and the mechanical compressor 31 is driven by the pulley. The solenoid valve 11 is de-energized and in the open circuit state, while the solenoid valve 21 is energized and connected. The air conditioning system is driven by the mechanical compressor 31 to operate and provide heating. This situation generally occurs when the vehicle has just been started or when the ambient temperature is low. If the feedback speed is zero, the drive board controls the parking mode to be activated, the electromagnetic clutch is de-energized and disengaged, the temperature sensor 16 monitors the outlet temperature of the cooling medium, when it exceeds the set temperature (generally set to 70℃-80℃), the first control valve 221 and the second control valve 222 are energized and conduct, the electromagnetic clutch is de-energized and disengaged, the solenoid valve 11 is also de-energized, and the indoor heat exchanger 2 only provides heating under the condition of diesel engine coolant heat exchange. As the outlet temperature of the cooling medium slowly decreases (diesel engine stops), when it is lower than the set temperature, the first control valve 221 and the second control valve 222 are both de-energized, the diesel engine cooling system 12 does not work, and the electric compressor 32 and the solenoid valve 11 are energized and run to provide heating.

[0058] When the driver activates the warm-up mode on the vehicle's central control screen, the air conditioning system operates under the drive of the electric compressor 32. After a delay (usually 1 minute), the first control valve 221, the second control valve 222, and the cooling water pump are energized (to prevent the cooling medium from freezing and damaging the pump body). The refrigerant and cooling medium exchange heat in the indoor heat exchanger 2 (e.g., Figure 4 The refrigerant and cooling medium flow in opposite directions, accelerating heat exchange. When the temperature sensor 16 detects that the outlet temperature of the cooling medium is higher than the lower limit temperature (generally set to 20℃-30℃), the main control board automatically shuts off the warm-up mode.

[0059] According to an embodiment of this application, a vehicle is provided, including an air conditioning system, wherein the air conditioning system is the air conditioning system described above, and the vehicle is a car, truck, etc.

[0060] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0061] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. An air conditioning system, characterized by, The air conditioning system comprises: a diesel engine assembly (1), which comprises a cooling system (12) having a cooling medium and a diesel engine body (11) to be cooled by the cooling system (12); and an indoor heat exchanger (2) capable of communicating with the cooling system (12); when the air conditioning system heats indoor air, the cooling medium after heat exchange with the diesel engine body (11) can enter the indoor heat exchanger (2) to heat indoor air. The air conditioning system has a freeze protection mode and a parking mode, and in the parking mode and the freeze protection mode, when the indoor heat exchanger (2) heats indoor air, the cooling medium in the cooling system (12) can enter the indoor heat exchanger (2) to exchange heat with the refrigerant in the indoor heat exchanger (2) to heat the cooling medium in the cooling system (12).

2. The air conditioning system as claimed in claim 1, wherein, The cooling system (12) comprises a cooling pipeline and a cooling heat exchanger (13) connected to the cooling pipeline, which is used to exchange heat with the cooling medium in the cooling pipeline to cool the cooling medium.

3. The air conditioning system as set forth in claim 2, wherein The cooling system (12) further comprises a bypass pipeline (14) arranged in parallel with the cooling heat exchanger (13) on the cooling pipeline, and a flow control valve (141) is arranged on the bypass pipeline (14), which can control the flow of the cooling medium through the bypass pipeline (14) to adjust the temperature of the cooling medium in the cooling system (12).

4. The air conditioning system as claimed in claim 3, wherein When T>T1, the opening of the flow control valve (141) is controlled to decrease during the air conditioning system cooling indoor air; and / or, when T 5. The air conditioning system as set forth in claim 3, wherein The air conditioning system further comprises a first control valve (221) capable of controlling the communication or disconnection of the indoor heat exchanger (2) and the cooling system (12); when T>T2, the first control valve (221) is controlled to open to enable the communication of the indoor heat exchanger (2) and the cooling system (12) during the air conditioning system heating indoor air, so that the cooling medium after heat exchange with the diesel engine body (11) enters the indoor heat exchanger (2) to heat indoor air; and / or, when T≦T2, the first control valve (221) is controlled to close to enable the cooling medium after heat exchange with the diesel engine body (11) to continue to flow in the cooling system (12) during the air conditioning system heating indoor air; wherein T2 is a second preset temperature.

6. The air conditioning system as claimed in claim 5, wherein When the air conditioning system heats the indoor, when T<=T2, the first control valve (221) is closed, and the opening of the flow control valve (141) is increased.

7. The air conditioning system as claimed in claim 1, wherein The air conditioning system further comprises a compressor assembly (3), a four-way valve (41), a throttling component (42), and an outdoor heat exchanger (43); the four-way valve (41) has an A port, a B port, a C port, and a D port; the outlet of the compressor assembly (3) is communicated to the A port; the B port is communicated to the inlet of the compressor assembly (3); the C port is communicated to the first port of the indoor heat exchanger (2); the D port is communicated to the first port of the outdoor heat exchanger (43); the second port of the indoor heat exchanger (2), the throttling component (42), and the second port of the outdoor heat exchanger (43) are sequentially communicated; the air conditioning system further comprises an unloading pipeline, the first pipe opening of the unloading pipeline is communicated between the A port and the outlet of the compressor assembly (3), the second pipe opening of the unloading pipeline is communicated between the B port and the inlet of the compressor assembly (3), and an unloading valve (44) is arranged on the unloading pipeline, which is used to control the opening and closing of the unloading pipeline.

8. The air conditioning system as claimed in claim 7, wherein The air conditioning system further comprises a rotating speed sensor capable of detecting the rotating speed of the diesel engine main shaft; and a control system capable of controlling the air conditioning system to enter the parking mode or the driving mode according to the rotating speed of the diesel engine main shaft.

9. The air conditioning system as claimed in claim 8, wherein The compressor assembly (3) comprises a mechanical compressor (31) and an electric compressor (32) arranged in parallel with each other; the diesel engine body (11) comprises a diesel engine main shaft, the mechanical compressor (31) is connected with the diesel engine main shaft; the diesel engine main shaft can drive the mechanical compressor (31) to operate so as to heat or cool the indoor heat exchanger (2); the electric compressor (32) is connected with a battery, and the battery can drive the electric compressor (32) to operate so as to heat or cool the indoor heat exchanger (2).

10. The air conditioning system as claimed in claim 9, wherein When the air conditioning system is in the driving mode, the diesel engine main shaft can drive the mechanical compressor (31) to operate so as to heat or cool the indoor heat exchanger (2); and / or, when the air conditioning system is in the parking mode, the electric compressor (32) is connected with a battery, and the battery can drive the electric compressor (32) to operate so as to heat or cool the indoor heat exchanger (2); and / or, when H and / or, when H>=H1, the air conditioning system is controlled to enter the driving mode; wherein H is the rotating speed of the diesel engine main shaft, and H1 is a first preset rotating speed.

11. The air conditioning system as set forth in claim 1, wherein The indoor heat exchanger (2) comprises a first heat exchange pipe (231) and a second heat exchange pipe (232), the first heat exchange pipe (231) is provided with refrigerant, and the second heat exchange pipe (232) is communicated with the cooling system (12).

12. A vehicle characterized by comprising: An air conditioning system comprising the air conditioning system of any one of claims 1 to 11.

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