阅读说明：本技术 一种新能源汽车除霜系统 (New energy automobile defrosting system ) 是由 夏嵩勇 刘子萌 刘劲松 张栋杰 于 2020-03-31 设计创作，主要内容包括：本发明公开了一种新能源汽车除霜系统,包括:化霜除冰回路；所述化霜除冰回路包括依次串联的液气分离器、压缩机、内部冷凝器、常开电磁阀、外部换热器、第二电子膨胀阀、冷却器和所述液气分离器。本发明所涉及新能源汽车除霜系统的原理图清晰不复杂,使用的零部件少,成本低,同时拥有乘员舱热泵空调系统制冷和制热,电池冷却和加热,电机冷却和热回收,外部蒸发器化霜除冰等功能。并且能源利用率高,更安全等特点。(The invention discloses a defrosting system of a new energy automobile, which comprises a defrosting and deicing loop, a defrosting and deicing loop and a defrosting and deicing loop; the defrosting and deicing loop comprises a liquid-gas separator, a compressor, an internal condenser, a normally open solenoid valve, an external heat exchanger, a second electronic expansion valve, a cooler and the liquid-gas separator which are sequentially connected in series. The defrosting system of the new energy automobile has clear and uncomplicated schematic diagram, few used parts and low cost, and simultaneously has the functions of refrigerating and heating of a heat pump air conditioning system of a passenger compartment, cooling and heating of a battery, cooling and heat recovery of a motor, defrosting and deicing of an external evaporator and the like. And the energy utilization rate is high, and the safety is higher.)

1. A defrosting system of a new energy automobile is characterized by comprising a defrosting and deicing loop;

the defrosting and deicing loop comprises a liquid-gas separator (18), a compressor (19), an internal condenser (20), a normally open electromagnetic valve (21), an external heat exchanger (22), a second electronic expansion valve (26), a cooler (14) and the liquid-gas separator (18) which are sequentially connected in series.

2. The system of claim 1, wherein the defrosting and deicing circuit further comprises: second check valve (23), first electronic expansion valve (24) and evaporimeter (25), the entrance point of second check valve (23) is connected the exit end of outside heat exchanger (22), the exit end of second check valve (23) is connected the entrance point of second electronic expansion valve (26) with the entrance point of first electronic expansion valve (24), the exit end of first electronic expansion valve (24) is connected the entrance point of evaporimeter (25), the exit end of evaporimeter (25) is connected the entrance point of liquid-gas separator (18).

3. The system of claim 1, wherein the defrosting and deicing circuit further comprises: the inlet end of the third electronic expansion valve (27) is connected with the inlet end of the normally open electromagnetic valve (21) and the outlet end of the internal condenser (20) respectively, and the outlet end of the third electronic expansion valve (27) is connected with the outlet end of the normally open electromagnetic valve (21) and the inlet end of the external heat exchanger (22) respectively.

4. The system of claim 2, wherein the defrosting and deicing circuit further comprises: first normally closed solenoid valve (28), the entrance point of first normally closed solenoid valve (28) is connected respectively the entrance point of normally open solenoid valve (21) with the exit end of inside condenser (20), the exit end of first normally closed solenoid valve (28) is connected respectively the entrance point of first electronic expansion valve (24), the exit end of second check valve (23) with the exit end of cooler (14).

5. The system of claim 4, wherein the defrosting and deicing circuit further comprises: the inlet end of the second normally closed electromagnetic valve (29) is connected with the inlet end of the second one-way valve (23) and the outlet end of the external heat exchanger (22) respectively, and the outlet end of the second normally closed electromagnetic valve (29) is connected with the inlet end of the liquid-gas separator (18).

6. The system of claim 3, further comprising: a battery circuit;

the battery circuit includes: the cooling system comprises a second expansion kettle (11), a third water pump (12) and a battery pack (13) which are connected in series through a cooling liquid pipeline, wherein the outlet end of the battery pack (13) is connected with the inlet end of a cooler (14), and the outlet end of the cooler (14) is connected with the inlet end of the second expansion kettle (11).

7. The system of claim 6, further comprising: the water mixing device (5), the first one-way valve (15) and the second three-way valve (10);

the inlet end of the first one-way valve (15) is connected with the outlet end of the cooler (14) and the first inlet end of the second three-way valve (10) respectively, the outlet end of the first one-way valve (15) is connected with the inlet end of the water mixing device (5), the outlet end of the water mixing device (5) is connected with the second inlet end of the second three-way valve (10), and the outlet end of the second three-way valve (10) is connected with the inlet end of the second expansion kettle (11).

8. The system of claim 7, further comprising: a motor loop;

the motor circuit includes: the device comprises a first expansion kettle (1), a first water pump (2), a charger (3) and a motor (4) which are connected in series through a cooling liquid pipeline in sequence;

the inlet end of the first expansion kettle (1) is connected with the outlet end of the water mixing device (5), and the outlet end of the motor (4) is connected with the inlet end of the water mixing device (5).

9. The system of claim 8, wherein the motor circuit further comprises: a low temperature radiator (16) and a third three-way valve (17);

the inlet end of the low-temperature radiator (16) is respectively connected with the outlet end of the motor (4) and the inlet end of the water mixing device (5), the outlet end of the low-temperature radiator (16) is further connected with the first inlet end of the third three-way valve (17), the second inlet end of the third three-way valve (17) is connected with the outlet end of the water mixing device (5), and the outlet end of the third three-way valve (17) is connected with the inlet end of the first expansion kettle (1).

10. The system of claim 9, further comprising: a heating circuit;

the heating loop comprises a second water pump (7), a heater (8), a first three-way valve (9) and a warm air core body (6) which are connected in series through a cooling liquid pipeline in sequence;

the outlet end of the warm air core body (6) is respectively connected with the outlet end of the water mixing device (5) and the inlet end of the second water pump (7), and the other outlet end of the first three-way valve (9) is connected with the inlet end of the water mixing device (5).

Technical Field

The invention relates to the technical field of new energy automobile heat management, in particular to a defrosting system of a new energy automobile.

Background

With the popularization of new energy vehicles, the safety of the new energy vehicles is more and more concerned by people. The defrosting system of the new energy automobile is an efficient and energy-saving system, and aims to reduce the decrement of the driving mileage of the whole automobile on the premise of ensuring the comfort of a passenger compartment, improve the durability of a battery, effectively reduce the energy consumption of the automobile and be equipped on certain high-end electric vehicles at present.

Under the environment of low temperature (about 2 ℃) in winter, when external humidity is great, the surface of evaporimeter can frost, and the evaporimeter frosts to a certain extent and can influence the heat absorption of evaporimeter to lead to the compressor suction pressure to hang down excessively, trigger compressor low pressure protection and shut down, passenger cabin heats and can only open heater (PTC) after stopping and heat to passenger cabin, and the energy consumption can increase this moment, and the continuation of the journey mileage can reduce. On the other hand, if the environment of the whole vehicle is always below 0 ℃, frost on the surface of the evaporator cannot be removed automatically, the whole vehicle cannot be heated by a heat pump system all the time, only a heater (PTC) can be used for heating a passenger compartment, the energy consumption of the whole vehicle is always large in the period of time, and the endurance mileage is reduced.

Therefore, it is highly desirable to provide a new energy vehicle defrosting system capable of heating a new energy vehicle battery and a passenger compartment, so as to improve defrosting efficiency and user friendliness.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a defrosting system of a new energy automobile, which comprises a defrosting and deicing loop;

the defrosting and deicing loop comprises a liquid-gas separator, a compressor, an internal condenser, a normally open solenoid valve, an external heat exchanger, a second electronic expansion valve, a cooler and the liquid-gas separator which are sequentially connected in series.

Further, the defrosting and deicing circuit further comprises: the inlet end of the second one-way valve is connected with the outlet end of the external heat exchanger, the outlet end of the second one-way valve is connected with the inlet end of the second electronic expansion valve and the inlet end of the first electronic expansion valve, the outlet end of the first electronic expansion valve is connected with the inlet end of the evaporator, and the outlet end of the evaporator is connected with the inlet end of the liquid-gas separator.

Further, the defrosting and deicing circuit further comprises: and the inlet end of the third electronic expansion valve is respectively connected with the inlet end of the normally open solenoid valve and the outlet end of the internal condenser, and the outlet end of the third electronic expansion valve is respectively connected with the outlet end of the normally open solenoid valve and the inlet end of the external heat exchanger.

Further, the defrosting and deicing circuit further comprises: the inlet end of the first normally closed solenoid valve is connected with the inlet end of the normally open solenoid valve and the outlet end of the internal condenser respectively, and the outlet end of the first normally closed solenoid valve is connected with the inlet end of the first electronic expansion valve, the outlet end of the second check valve and the outlet end of the cooler respectively.

Further, the defrosting and deicing circuit further comprises: and the inlet end of the second normally closed electromagnetic valve is respectively connected with the inlet end of the second one-way valve and the outlet end of the external heat exchanger, and the outlet end of the second normally closed electromagnetic valve is connected with the inlet end of the liquid-gas separator.

Further, still include: a battery circuit;

the battery circuit includes: the second expansion kettle, the third water pump and the battery pack are sequentially connected in series through a cooling liquid pipeline, the outlet end of the battery pack is connected with the inlet end of the cooler, and the outlet end of the cooler is connected with the inlet end of the second expansion kettle.

Further, still include: the water mixing device comprises a water mixing device, a first one-way valve and a second three-way valve;

the inlet end of the first one-way valve is connected with the outlet end of the cooler and the first inlet end of the second three-way valve respectively, the outlet end of the first one-way valve is connected with the inlet end of the water mixing device, the outlet end of the water mixing device is connected with the second inlet end of the second three-way valve, and the outlet end of the second three-way valve is connected with the inlet end of the second expansion kettle.

Further, still include: a motor loop;

the motor circuit includes: the first expansion kettle, the first water pump, the charger and the motor are connected in series through a cooling liquid pipeline in sequence;

the inlet end of the first expansion kettle is connected with the outlet end of the water mixing device, and the outlet end of the motor is connected with the inlet end of the water mixing device.

Further, the motor circuit further includes: a low temperature radiator and a third three-way valve;

the inlet end of the low-temperature radiator is connected with the outlet end of the motor and the inlet end of the water mixing device respectively, the outlet end of the low-temperature radiator is further connected with the first inlet end of the third three-way valve, the second inlet end of the third three-way valve is connected with the outlet end of the water mixing device, and the outlet end of the third three-way valve is connected with the inlet end of the first expansion kettle.

Further, still include: a heating circuit;

the heating loop comprises a second water pump, a heater, a first three-way valve and a warm air core body which are sequentially connected in series through a cooling liquid pipeline;

the outlet end of the warm air core body is respectively connected with the outlet end of the water mixing device and the inlet end of the second water pump, and the other outlet end of the first three-way valve is connected with the inlet end of the water mixing device. The implementation of the invention has the following beneficial effects:

the defrosting system of the new energy automobile has clear and uncomplicated schematic diagram, few used parts and low cost, and simultaneously has the functions of refrigerating and heating of a heat pump air conditioning system of a passenger compartment, cooling and heating of a battery, cooling and heat recovery of a motor, defrosting and deicing of an external evaporator and the like. And the energy utilization rate is high, and the safety is higher.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a new energy vehicle defrosting system according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of another new energy vehicle defrosting system according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a new energy vehicle defrosting system according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a defrosting system of a new energy vehicle according to an embodiment of the present invention;

wherein, 1-a first expansion water kettle, 2-a first water pump, 3-a charger, 4-a motor, 5-a water mixing device, 6-a warm air core body, 7-a second water pump, 8-a heater, 9-a first three-way valve, 10-a second three-way valve, 11-a second expansion water kettle, 12-a third water pump, 13-a battery pack, 14-a cooler, 15-a first one-way valve, 16-a low-temperature radiator, 17-a third three-way valve, 18-a liquid-gas separator, 19-a compressor, 20-an internal condenser, 21-a normally open electromagnetic valve, 22-an external heat exchanger, 23-a second one-way valve, 24-a first electronic expansion valve, 25-an evaporator, 26-a second electronic expansion valve and 27-a third electronic expansion valve, 28-a first normally closed solenoid valve, 29-a second normally closed solenoid valve.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

It should be noted that when an element is referred to as being "connected" to another element, it can be either a circuit connection or a communication connection.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Fig. 1 is a schematic structural diagram of a new energy vehicle defrosting system according to an embodiment of the present invention; as shown in FIG. 1, the invention provides a defrosting system of a new energy automobile, which comprises a defrosting and deicing loop;

the defrosting and deicing loop comprises a liquid-gas separator 18, a compressor 19, an internal condenser 20, a normally open electromagnetic valve 21, an external heat exchanger 22, a second electronic expansion valve 26, a cooler 14 and the liquid-gas separator 18 which are sequentially connected in series.

On the basis of the above embodiments, in an embodiment of the present specification, the defrosting and deicing circuit further includes: the inlet end of the second one-way valve 23 is connected with the outlet end of the external heat exchanger 22, the outlet end of the second one-way valve 23 is connected with the inlet end of the second electronic expansion valve 26 and the inlet end of the first electronic expansion valve 24, the outlet end of the first electronic expansion valve 24 is connected with the inlet end of the evaporator 25, and the outlet end of the evaporator 25 is connected with the inlet end of the liquid-gas separator 18.

On the basis of the above embodiments, in an embodiment of this specification, fig. 2 is a schematic structural diagram of another new energy vehicle defrosting system provided in an embodiment of the present invention; as shown in fig. 2, the defrosting and deicing circuit further includes: and an inlet end of the third electronic expansion valve 27 is connected to an inlet end of the normally open solenoid valve 21 and an outlet end of the internal condenser 20, respectively, and an outlet end of the third electronic expansion valve 27 is connected to an outlet end of the normally open solenoid valve 21 and an inlet end of the external heat exchanger 22, respectively.

On the basis of the above embodiments, in an embodiment of this specification, fig. 3 is a schematic structural diagram of another new energy vehicle defrosting system provided in an embodiment of the present invention; as shown in fig. 3, the defrosting and deicing circuit further includes: a first normally closed solenoid valve 28, the entrance end of the first normally closed solenoid valve 28 is connected respectively the entrance end of the normally open solenoid valve 21 with the exit end of the internal condenser 20, the exit end of the first normally closed solenoid valve 28 is connected respectively the entrance end of the first electronic expansion valve 24, the exit end of the second check valve 23 and the exit end of the cooler 14.

On the basis of the above embodiments, in an embodiment of the present specification, the defrosting and deicing circuit further includes: and an inlet end of the second normally closed electromagnetic valve 29 is connected with an inlet end of the second check valve 23 and an outlet end of the external heat exchanger 22, respectively, and an outlet end of the second normally closed electromagnetic valve 29 is connected with an inlet end of the liquid-gas separator 18.

As shown in fig. 1, fig. 1 is a schematic structural diagram of defrosting and deicing of external evaporator 25, where external evaporator 25 is defrosted and deiced, and this case is divided into two cases:

1 after a vehicle is parked in an open environment for a period of time, because of weather, a thicker ice layer exists on the vehicle, at this time, the surfaces of an external evaporator 25 and a radiator also have the ice layer, at this time, the heating of a conventional heat pump cannot be started, because the external evaporator 25 is covered by the ice layer, air cannot exchange heat through the ice layer, so the vehicle needs to be deiced firstly, the principle of deicing is that the external evaporator 25 is used as a condenser, the condenser emits heat to the ice layer on the surface, at this time, a chiller is used as the evaporator 25 to absorb heat of a motor 4 or a battery from a cooling loop, or simultaneously absorb heat of the battery of the motor 4, the ice layer melts slowly, after the deicing is completed, the conventional heat pump can be started to heat through an internal condenser 20, the external evaporator 25 absorbs heat from ambient air, and if the deicing function is not available, the vehicle cannot start the heat pump to heat a passenger compartment, only the heater (PTC) can be turned on, resulting in increased energy consumption.

2 vehicle is at the in-process of traveling, under the environment about 2 ℃ of low temperature in winter, when external humidity is great, the surface can slowly frosting after evaporimeter 25 operation a period, evaporimeter 25 frosts to certain extent can influence the heat absorption of evaporimeter 25 to lead to compressor 19 suction pressure to hang down excessively, trigger compressor 19 low pressure protection and shut down, passenger cabin heats and can only open heater (PTC) after stopping and heat the passenger cabin, the energy consumption can increase this moment, continuation of the journey mileage can reduce. At the moment, the operation mode is switched to the defrosting and deicing mode, frost can be removed in a short time, and the operation mode is switched to the conventional heat pump mode for heating after the frost is removed, so that the heater (PTC) is not required to be started for heating, the heating requirement of the passenger compartment is met, and the energy consumption is lower.

Illustratively, when the passenger compartment is refrigerated, the compressor 19 is turned on to refrigerate via the evaporator 25.

For example, when the battery needs to be cooled down quickly, the refrigeration circuit is opened, and at this time, the evaporator 25 is not operated, that is, the passenger compartment does not have a cooling request.

Illustratively, the passenger compartment is refrigerated and the battery is cooled, and in this case, the passenger compartment has a refrigeration demand and the battery also has a cooling demand, so the cooling demands of the passenger compartment and the battery are met by simultaneously opening the passenger compartment and the battery.

In some possible embodiments, the air conditioning circuit can also provide conventional heating of the passenger compartment by releasing heat from the internal condenser 20 and absorbing heat from the environment by the external evaporator 25.

In some possible embodiments, the passenger compartment normal heating and the chiller heat recovery heating are operated simultaneously, in which case the external evaporator 25 and the chiller evaporator 25 are simultaneously turned on to absorb heat, and the internal condenser 20 releases heat, so as to achieve the purpose of heating the passenger compartment.

The invention relates to a defrosting system of a new energy automobile, which can be used in a PMA platform project or other platforms of electric vehicle heat distribution pump systems.

The new energy automobile defrosting system has the innovation points that a schematic diagram is clear and uncomplicated, the used parts are few, the cost is low, and the system has the functions of refrigerating and heating of the passenger compartment heat pump air conditioning system, cooling and heating of a battery, cooling and heat recovery of the motor 4, defrosting and deicing of the external evaporator 25 and the like.

In another case, the external evaporator 25 is frozen, the heat pump absorbs heat from the motor 4 and the battery through the chiller, and the external evaporator 25 performs deicing. The external evaporator 25 corresponds to an outer condenser in the figure, and can be used for both heating and cooling the system by using the evaporator 25 and the condenser.

On the basis of the above embodiments, in an embodiment of the present disclosure, fig. 4 is a schematic structural diagram of a new energy vehicle defrosting system according to an embodiment of the present disclosure; as shown in fig. 4, the method further includes: a battery circuit;

the battery circuit includes: the system comprises a second expansion kettle 11, a third water pump 12 and a battery pack 13 which are connected in series through a cooling liquid pipeline, wherein the outlet end of the battery pack 13 is connected with the inlet end of a cooler 14, and the outlet end of the cooler 14 is connected with the inlet end of the second expansion kettle 11.

On the basis of the above embodiments, in an embodiment of the present specification, the method further includes: the water mixing device 5, the first one-way valve 15 and the second three-way valve 10;

the inlet end of the first one-way valve 15 is connected to the outlet end of the cooler 14 and the first inlet end of the second three-way valve 10, the outlet end of the first one-way valve 15 is connected to the inlet end of the water mixing device 5, the outlet end of the water mixing device 5 is connected to the second inlet end of the second three-way valve 10, and the outlet end of the second three-way valve 10 is connected to the inlet end of the second expansion kettle 11.

On the basis of the above embodiments, in an embodiment of the present specification, the method further includes: a motor loop;

the motor circuit includes: the device comprises a first expansion kettle 1, a first water pump 2, a charger 3 and a motor 4 which are connected in series through a cooling liquid pipeline in sequence;

the inlet end of the first expansion kettle 1 is connected with the outlet end of the water mixing device 5, and the outlet end of the motor 4 is connected with the inlet end of the water mixing device 5.

On the basis of the above embodiments, in an embodiment of the present specification, the motor circuit further includes: a low-temperature radiator 16 and a third three-way valve 17;

the inlet end of the low-temperature radiator 16 is respectively connected with the outlet end of the motor 4 and the inlet end of the water mixing device 5, the outlet end of the low-temperature radiator 16 is further connected with the first inlet end of the third three-way valve 17, the second inlet end of the third three-way valve 17 is connected with the outlet end of the water mixing device 5, and the outlet end of the third three-way valve 17 is connected with the inlet end of the first expansion kettle 1.

On the basis of the above embodiments, in an embodiment of the present specification, the method further includes: a heating circuit;

the heating loop comprises a second water pump 7, a heater 8, a first three-way valve 9 and a warm air core body 6 which are sequentially connected in series through a cooling liquid pipeline;

the outlet end of the warm air core body 6 is respectively connected with the outlet end of the water mixing device 5 and the inlet end of the second water pump 7, and the other outlet end of the first three-way valve 9 is connected with the inlet end of the water mixing device 5.

Specifically, the first expansion water bottle 1 is used for when the engine operates, coolant liquid can be in the motor loop and incessantly circulate, can flow through first expansion water bottle 1 midway, if the pressure is too high, or the coolant liquid is excessive, unnecessary gas and coolant liquid will flow out from the bypass water course of first expansion water bottle 1, avoid cooling system pressure too high, cause the bad consequence of violence pipe. The first water pump 2 is used for driving the directional flow of the cooling liquid in the cooling liquid pipeline. The charger 3 is used to provide voltage or current conversion for the motor 4. The motor 4 is used to drive the vehicle. The water mixing device 5(HUB) is used to mix the coolant in the motor circuit and the coolant circuit through the warm-dispensing core, the HUB: the effect is that the coolant that gets into the HUB with the battery return circuit coolant that gets into the HUB mixes, and the higher temperature motor 4 coolant mixes with the lower battery coolant of temperature continuously like this.

It should be noted that the charger 3, the motor 4, and the warm air core 30 are not directly connected to the coolant pipeline, but are all parts that can be heated or cooled by the coolant pipeline. It is to be understood that the cooling liquid is not particularly limited in the embodiments of the present specification, and may be set according to the actual situation. In some possible embodiments, the electric machine 4 may comprise a front electric machine 4 and a rear electric machine 4, the front electric machine 4 being used to drive the front wheels of the vehicle and the rear electric machine 4 being used to drive the rear wheels of the vehicle.

Specifically, the low-temperature radiator 16 mainly functions to cool down the motor circuit or the battery circuit.

The internal condenser 20 is passed through both the cooling and heating modes.

The outside heat exchanger 22 is used as a condenser in cooling and as an evaporator 25 in heating.

The evaporator 25 is opened when the passenger compartment has a refrigeration demand, and mainly plays a role in refrigeration and dehumidification.

A Chiller: the heat exchanger is used for heat exchange between the cooling liquid and the refrigerant by passing the refrigerant through one side and the cooling liquid through the other side, and mainly aims at cooling the cooling liquid or recovering heat in the cooling liquid.

The liquid-gas separator 18(ACCU) mainly functions to absorb the liquid refrigerant in the pipeline, ensure that the refrigerant entering the compressor 19 is gaseous refrigerant, and prevent the compressor 19 from liquid impact.

Heater 8 (HVH): for liquid heating (heater (PTC)), its main function is to provide a heat source for the passenger compartment or battery during winter.

The embodiment of the specification provides a new energy automobile defrosting system, can realize utilizing the heat that motor 4 produced to heat passenger cabin when motor 4 generates heat, has avoided thermal loss, has improved the availability factor of the energy, has reduced the loss of whole car energy, improves new energy automobile's driving mileage simultaneously to the system structure that this application provided is clear, with low costs, safer.

Specifically, a third three-way valve 17 may be further disposed in the motor circuit, the third three-way valve 17 may be provided with two inlet ends and an outlet end, the first inlet end and the second inlet end may be respectively connected to two ends of the water mixing device 5 on the motor circuit, and the outlet end is connected to the first expansion kettle 1.

Illustratively, when the passenger compartment does not need to be heated by heat energy generated by the motor 4, the third three-way valve 17 may be controlled to close the first inlet port and open the second inlet port, so that the cooling liquid does not flow through the water mixing device 5, and the self-circulation of the motor loop is realized, thereby achieving the function of cooling the motor 4. Under the condition, the motor loop is in a self-heat-insulation state, the heat of the motor loop cannot be recycled, and the cooling liquid of the motor loop does not need to be cooled through a radiator.

When the passenger compartment has a small amount of heating requirements, the heating requirement of the passenger compartment can be met only by heating the warm air core body 30 by using the heat of the motor loop without starting a heat pump for heating.

When the passenger compartment has no heating requirement, but the temperature setting of the front and the secondary drives is different, the heat of the motor 4 is required to be used for heating the warm air core body 30 at this time, and the temperature of cold air passing through the warm air core body 30 is adjusted by adjusting the position of the temperature air door, so that the adjusting effect of different temperature areas is realized, and meanwhile, the motor loop can also be cooled.

For example, when the passenger compartment needs to be heated by the heater 8 alone, the first three-way valve 9 may be controlled such that the second water pump 7, the heater 8, the first three-way valve 9, and the warm air core 30 constitute a single heat circulation loop.

For example, when the motor 4 needs the heater 8 to heat alone, the third three-way valve 17 and the first three-way valve 9 may be controlled, so that the second water pump 7, the heater 8, the first three-way valve 9, the water mixing device 5, the third three-way valve 17, the first expansion water kettle 1, the first water pump 2, the charger 3, the motor 4, the water mixing device 5, and the second water pump 7 form an individual heat circulation loop, so that the heater 8 heats the motor 4.

Specifically, the battery pack 13 is used for providing electric power for the new energy automobile, the battery pack 13 may be provided with a plurality of battery packs, the battery pack 13 and the second water pump 7 are connected by a cooling liquid pipeline, and the cooling liquid pipeline is connected with the cooling fins of the battery pack 13 so as to heat or cool the battery pack 13. The second three-way valve 10 is a two-in one-out type three-way valve. The cooler 14 may be a heat exchanger or a chiller.

For example, the battery circuit may be self-cycling when the battery pack 13 needs to maintain a constant temperature.

When the battery pack 13 needs to be heated, there are at least two ways to heat up, one of which is: the heater 8 heats the battery pack 13, a heating loop is formed by the second water pump 7, the heater 8, the first three-way valve 9 and the water mixing device 5, and then the cooling liquid in the water mixing device 5 is heated, and the battery loop is connected with the heating loop in parallel, so that the heater 8 can heat the battery pack 13; the second step is as follows: the battery pack 13 is heated by heat generated by the motor 4, the motor loop is connected with the battery loop in parallel through the water mixing device 5, and the heat generated by the motor 4 is transmitted to the battery pack 13 through cooling liquid, so that the battery pack 13 is heated.

When the battery pack 13 needs to be cooled, there are at least two ways to cool, one of which is: when the heater 8 does not work, the heating loop can enlarge the cooling liquid capacity of the battery loop and increase the cooling efficiency of the battery pack 13; the second step is as follows: when the heat that motor 4 produced is less than group battery 13 heat, the motor return circuit passes through mixing water equipment 5 with the battery return circuit and connects in parallel, and the heat that group battery 13 produced can be passed through mixing water equipment 5 and is given the motor return circuit, increase group battery 13 cooling efficiency.

It will be appreciated that the heat of the battery or motor 4 may also be cooled or recovered by the cooler 14. The temperature of the battery loop is high, the compressor 19 needs to be started, heat is absorbed from the battery loop through the beller, and the purpose of reducing the temperature of the battery loop is achieved, and at the moment, the passenger compartment may or may not have a refrigeration requirement.

When the temperature of the battery loop is higher than 10 ℃ relative to the ambient temperature, the passenger compartment can be heated by recovering the heat of the battery, and the passenger compartment has a heating requirement.

Specifically, the first expansion kettle 1 can be provided with a water guide pipe, the water guide pipe is connected with the first expansion kettle 1 and the low-temperature radiator 16, when the pressure of the first expansion kettle 1 is too large, the water guide pipe can keep the pressure balance of the first expansion, and danger caused by the too large pressure is avoided.

For example, when the motor 4 needs to be cooled, the cooling may be performed by the low-temperature radiator 16, and the specific cooling circuit may be: the device comprises a first expansion kettle 1, a first water pump 2, a charger 3, a motor 4, a low-temperature radiator 16, a third three-way valve 17 and the first expansion kettle 1.

When both the motor 4 and the battery need to be cooled, they can be cooled simultaneously by the low-temperature radiator 16, and the specific cooling loop may be: the water mixing device comprises a first expansion kettle 1, a first water pump 2, a charger 3, a motor 4, a low-temperature radiator 16, a water mixing device 5, a second three-way valve 10, a second expansion kettle 11, a second water pump 7, a battery pack 13, a cooler 14, a first one-way valve 15, the water mixing device 5, a third three-way valve 17 and the first expansion kettle 1. If the temperature of the motor loop is high at this time, the loop cannot be opened, because the temperature of the battery loop is increased due to the hot water in the motor loop, which may cause irreversible damage to the battery.

When both the motor 4 and the battery need to be cooled, they can be cooled simultaneously by the cooler 14, and the specific cooling loop can be: the water mixing device comprises a first expansion kettle 1, a first water pump 2, a charger 3, a motor 4, a water mixing device 5, a second three-way valve 10, a second expansion kettle 11, a second water pump 7, a battery pack 13, a cooler 14, a first one-way valve 15, a water mixing device 5, a third three-way valve 17 and the first expansion kettle 1. If the temperature of the motor loop is high at this time, the loop cannot be opened, because the temperature of the battery loop is increased due to the hot water in the motor loop, which may cause irreversible damage to the battery.

When the motor 4 and the battery are connected in series with the cooler 14 for heat recovery, the environment temperature is generally lower in the case, the heat recovered by the heat recovery is mainly used for heating the heat pump of the passenger compartment, and the water pump can absorb heat from the motor 4 and the battery through the chiller.

On the basis of the above embodiments, in an embodiment of the present disclosure, the third three-way valve 17, the first three-way valve 9, the second three-way valve 10, the first one-way valve 15, the normally open electromagnetic valve 21, the second one-way valve 23, the first electronic expansion valve 24, the second electronic expansion valve 26, the third electronic expansion valve 27, the first normally closed electromagnetic valve 28, and the second normally closed electromagnetic valve 29 are all adjustable flow control valves.

And the coolant loop that the invention provides has at least three, it is the electrical machinery loop separately, battery loop and warm braw loop, every loop can operate alone and is not interfered by other loop, every two loops can mix alone and is not influenced by another loop too, when the electrical machinery loop three-way valve or battery loop three-way valve is invalid, can pass the three-way valve of the control battery loop or electrical machinery loop, and achieve the purpose that the hot water of the electrical machinery 4 can't enter the battery loop. The only failure condition is that the three-way valve of the motor circuit and the three-way valve of the battery circuit fail simultaneously. If the failure rate of the three-way valve is 1%, the probability of two three-way valves failing simultaneously becomes one in ten thousandth.

The functional safety is a very important problem of a pure electric vehicle, mainly considering that hot water with higher temperature in a motor loop can not enter a battery, and the functional safety is divided into the following aspects:

1. because the battery has the requirement of the temperature of the inlet water, the motor 4 can be triggered to reduce the power after the temperature of the inlet water exceeds 45 ℃, and the satisfaction degree of passengers can be reduced.

2. After the temperature of the inlet water exceeds 50 ℃, the power of the motor 4 can be triggered to be cut off, so that the power of the vehicle is lost, and if the condition that the power of the vehicle is lost occurs during high-speed traveling, the safety risk is very high.

3. After the temperature of the inlet water exceeds 50 ℃, if the power of the motor 4 is not cut off, the temperature of the battery loop can be continuously increased due to the continuous running of the vehicle, and the risk of burning and even explosion due to the overhigh temperature of the battery can be caused.

Considering that the parts cannot be made one hundred percent non-failure, in order to meet the requirement of functional safety, when the third three-way valve 17 of the motor circuit is damaged at the position of entering the HUB, the hot water in the motor 4 can be prevented from entering the battery by adjusting the second three-way valve 10 of the battery circuit to the position of small circulation. Unless the second three-way valve 10 of the battery circuit is also damaged, hot water from the motor 4 will not be caused to enter the battery.

If the probability of one water valve being damaged is one percent, the probability of two water valves being damaged simultaneously is one ten thousandth.

Therefore, the new energy automobile heat pipeline system provided by the application equivalently reduces the risk of battery thermal runaway by 100 times, and improves the safety of vehicles.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

While embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications and variations may be made therein by those of ordinary skill in the art within the scope of the present invention.