阅读说明：本技术 车辆余热回收系统 (Vehicle waste heat recovery system ) 是由 朱之冬 周奎宁 古小玲 陈春江 于 2021-09-16 设计创作，主要内容包括：本发明公开了车辆余热回收系统,所述车辆余热回收系统包括氢堆系统、供暖系统以及用于在所述氢堆系统和所述供暖系统之间实现热量传递的换热器,其中,所述换热器的第一流体腔的进水口与所述氢堆系统中的氢堆装置的出水口连接,所述换热器的第一流体腔的出水口与所述氢堆系统中的散热器的进水口连接；所述换热器的第二流体腔的进水口与所述供暖系统中的车内散热器的出水口连接,所述换热器的第二流体腔的出水口与所述供暖系统的水泵的进水口连接,解决车辆余热回收效果差的问题,实现氢堆装置产生的余热的有效回收利用。(The invention discloses a vehicle waste heat recovery system which comprises a hydrogen stack system, a heating system and a heat exchanger for realizing heat transfer between the hydrogen stack system and the heating system, wherein a water inlet of a first fluid cavity of the heat exchanger is connected with a water outlet of a hydrogen stack device in the hydrogen stack system, and a water outlet of the first fluid cavity of the heat exchanger is connected with a water inlet of a radiator in the hydrogen stack system; the water inlet of the second fluid cavity of the heat exchanger is connected with the water outlet of the radiator in the vehicle in the heating system, and the water outlet of the second fluid cavity of the heat exchanger is connected with the water inlet of the water pump of the heating system, so that the problem of poor vehicle waste heat recovery effect is solved, and the effective recovery and utilization of the waste heat generated by the hydrogen reactor device are realized.)

1. A vehicle waste heat recovery system, characterized in that the vehicle waste heat recovery system comprises a hydrogen stack system, a heating system and a heat exchanger for realizing heat transfer between the hydrogen stack system and the heating system,

the water inlet of the first fluid cavity of the heat exchanger is connected with the water outlet of the hydrogen reactor device in the hydrogen reactor system, and the water outlet of the first fluid cavity of the heat exchanger is connected with the water inlet of the radiator in the hydrogen reactor system;

and a water inlet of a second fluid cavity of the heat exchanger is connected with a water outlet of an in-vehicle radiator in the heating system, and a water outlet of the second fluid cavity of the heat exchanger is connected with a water inlet of a water pump of the heating system.

2. The vehicle waste heat recovery system of claim 1, further comprising a three-way solenoid valve, a first temperature sensor, a second temperature sensor, and a controller; wherein the content of the first and second substances,

a first port of the three-way electromagnetic valve is connected with a water inlet of a water pump of the heating system, a second port of the three-way electromagnetic valve is connected with a water inlet of a second fluid cavity of the heat exchanger, and a third port of the three-way electromagnetic valve is connected with a water outlet of an in-vehicle radiator of the heating system;

the first temperature sensor is positioned between the water outlet of the hydrogen reactor device and the water inlet of the first fluid cavity of the heat exchanger and is used for detecting a first temperature value of the water outlet of the hydrogen reactor device;

the second temperature sensor is positioned between a third port of the three-way electromagnetic valve and a water outlet of an in-vehicle radiator in the heating system and is used for detecting a second temperature value of the water outlet of the in-vehicle radiator;

the controller is configured to determine whether a first temperature value is greater than a reference temperature value, conduct the second port and the third port of the three-way electromagnetic valve when the first temperature value is greater than the reference temperature value, and switch and conduct the first port and the third port of the three-way electromagnetic valve when the first temperature value is less than or equal to the reference temperature value, where the reference temperature value is a sum of the second temperature value and a preset value.

3. The vehicle waste heat recovery system of claim 2, wherein the controller is further configured to obtain a power mode of the vehicle before determining whether the first temperature value is greater than the reference temperature value, and perform the step of determining whether the first temperature value is greater than the reference temperature value when the power mode of the vehicle is the second gear of the hydrogen fuel cell stack mode.

4. The vehicle waste heat recovery system of claim 3, wherein the controller is further configured to conduct the first port and the third port of the three-way solenoid valve when the power mode of the vehicle is a first gear of a hydrogen fuel cell stack mode, and wherein an operating power of the first gear is less than an operating power of the second gear.

5. The vehicle waste heat recovery system of claim 3, wherein the controller is further configured to conduct the first port and the third port of the three-way solenoid valve when the power mode of the vehicle is an electric-only mode.

6. The vehicle waste heat recovery system of claim 2, further comprising an electric heater connected in series between a water pump of the heating system and the in-vehicle radiator, the electric heater being configured to provide heat to an interior of the vehicle.

7. The vehicle waste heat recovery system according to claim 6, wherein the controller is further configured to obtain a third temperature value of the water outlet of the electric heater after the second port and the third port of the three-way solenoid valve or the first port and the third port of the three-way solenoid valve are conducted, and to turn on the electric heater when the third temperature value is less than a first preset temperature value.

8. The vehicle waste heat recovery system according to claim 7, wherein the controller is further configured to obtain a third temperature value of the water outlet of the electric heater after the electric heater is turned on, and to turn off the electric heater or reduce power of the electric heater when the currently obtained third temperature value is greater than a second preset temperature value.

9. The vehicle waste heat recovery system according to claim 7, wherein the controller is further configured to obtain a third temperature value of the water outlet of the electric heater after the electric heater is turned on, and adjust the operation mode of the electric heater to a heat preservation mode when the currently obtained third temperature value is less than or equal to a second preset temperature value.

10. The vehicle waste heat recovery system according to claim 1, wherein the heat exchanger is a plate heat exchanger, and the first fluid chamber and the second fluid chamber achieve heat exchange through a contact area.

Technical Field

The invention relates to the technical field of fuel cell automobiles, in particular to a vehicle waste heat recovery system.

Background

The fuel cell automobile is an important component of a new energy automobile, the current new energy fuel cell automobile generates electricity through a hydrogen stack device, heat generated by the hydrogen stack device is sent to an in-automobile pipeline and a radiator through a warm air side water circulation system to realize waste heat recovery, but when the temperature of a deionized cooling water outlet of the hydrogen stack device is lower than the return water temperature of antifreeze liquid of a heating system, the waste heat recovery effect of the automobile is poor.

Disclosure of Invention

The embodiment of the application provides a vehicle waste heat recovery system, and aims to solve the problem that when the temperature of an outlet of deionized cooling water of a hydrogen stack device is lower than the return water temperature of antifreeze of a heating system, the vehicle waste heat recovery effect is poor.

The embodiment of the application provides a vehicle waste heat recovery system, which comprises a hydrogen stack system, a heating system and a heat exchanger for realizing heat transfer between the hydrogen stack system and the heating system, wherein,

the water inlet of the first fluid cavity of the heat exchanger is connected with the water outlet of the hydrogen reactor device in the hydrogen reactor system, and the water outlet of the first fluid cavity of the heat exchanger is connected with the water inlet of the radiator in the hydrogen reactor system;

and a water inlet of a second fluid cavity of the heat exchanger is connected with a water outlet of an in-vehicle radiator in the heating system, and a water outlet of the second fluid cavity of the heat exchanger is connected with a water inlet of a water pump of the heating system.

In one embodiment, the vehicle waste heat recovery system further comprises a three-way electromagnetic valve, a first temperature sensor, a second temperature sensor and a controller; wherein the content of the first and second substances,

a first port of the three-way electromagnetic valve is connected with a water inlet of a water pump of the heating system, a second port of the three-way electromagnetic valve is connected with a water inlet of a second fluid cavity of the heat exchanger, and a third port of the three-way electromagnetic valve is connected with a water outlet of an in-vehicle radiator of the heating system;

the first temperature sensor is positioned between the water outlet of the hydrogen reactor device and the water inlet of the first fluid cavity of the heat exchanger and is used for detecting a first temperature value of the water outlet of the hydrogen reactor device;

the second temperature sensor is positioned between a third port of the three-way electromagnetic valve and a water outlet of an in-vehicle radiator in the heating system and is used for detecting a second temperature value of the water outlet of the in-vehicle radiator;

the controller is configured to determine whether a first temperature value is greater than a reference temperature value, conduct the second port and the third port of the three-way electromagnetic valve when the first temperature value is greater than the reference temperature value, and switch and conduct the first port and the third port of the three-way electromagnetic valve when the first temperature value is less than or equal to the reference temperature value, where the reference temperature value is a sum of the second temperature value and a preset value.

In an embodiment, the controller is further configured to obtain a power mode of the vehicle before determining whether the first temperature value is greater than the reference temperature value, and execute the step of determining whether the first temperature value is greater than the reference temperature value when the power mode of the vehicle is the second gear of the hydrogen fuel cell stack mode.

In one embodiment, the controller is further configured to conduct the first port and the third port of the three-way electromagnetic valve when the power mode of the vehicle is a first gear of a hydrogen fuel cell stack mode, wherein the operating power of the first gear is smaller than the operating power of the second gear.

In an embodiment, the controller is further configured to conduct the first port and the third port of the three-way electromagnetic valve when the power mode of the vehicle is an electric-only mode.

In one embodiment, the vehicle waste heat recovery system further comprises an electric heater connected in series between a water pump of the heating system and the radiator in the vehicle, and the electric heater is used for providing heat for the interior of the vehicle.

In an embodiment, the controller is further configured to obtain a third temperature value of the water outlet of the electric heater after the second port and the third port of the three-way electromagnetic valve are connected or the first port and the third port of the three-way electromagnetic valve are connected, and start the electric heater when the third temperature value is smaller than a first preset temperature value.

In an embodiment, the controller is further configured to, after the electric heater is turned on, obtain a third temperature value of the water outlet of the electric heater, and when the currently obtained third temperature value is greater than a second preset temperature value, turn off the electric heater or reduce the power of the electric heater.

In an embodiment, the controller is further configured to, after the electric heater is turned on, obtain a third temperature value of the water outlet of the electric heater, and adjust the operating mode of the electric heater to a heat preservation mode when the currently obtained third temperature value is less than or equal to a second preset temperature value.

In one embodiment, the heat exchanger is a plate heat exchanger, and the first fluid chamber and the second fluid chamber realize heat exchange through a contact area.

The embodiment of the application provides a vehicle waste heat recovery system, which comprises a hydrogen stack system, a heating system and a heat exchanger for realizing heat transfer between the hydrogen stack system and the heating system, wherein a water inlet of a first fluid cavity of the heat exchanger is connected with a water outlet of a hydrogen stack device in the hydrogen stack system, and a water outlet of the first fluid cavity of the heat exchanger is connected with a water inlet of a radiator in the hydrogen stack system; the water inlet of the second fluid cavity of the heat exchanger is connected with the water outlet of the in-vehicle radiator in the heating system, the water outlet of the second fluid cavity of the heat exchanger is connected with the water inlet of the water pump of the heating system, by adopting the technical scheme, when the hydrogen stack device generates high-temperature deionized cooling water, the heat of the hydrogen stack system is transferred to the warm air system through the heat exchanger, the heating system sends the heat to the in-vehicle pipeline and the in-vehicle radiator, and the in-vehicle radiator works to realize the effect of effectively recycling the waste heat generated by the hydrogen stack device.

Drawings

FIG. 1 is a schematic flow chart of a first embodiment of a vehicle waste heat recovery system according to the present invention;

FIG. 2 is a schematic flow chart of a second embodiment of the vehicle waste heat recovery system of the present invention;

FIG. 3 is a schematic flow chart of a sixth embodiment of a vehicle waste heat recovery system according to the present invention;

FIG. 4 is a schematic diagram of the control logic of the controller in the vehicle waste heat recovery system according to the present invention;

the objects, features, and advantages of the present invention will be further explained with reference to the accompanying drawings, which are an illustration of one embodiment, and not an entirety of the invention.

Detailed Description

For a better understanding of the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As shown in fig. 1, in a first embodiment of the present application, a vehicle waste heat recovery system of the present application includes: a hydrogen stack system 10, a heating system 20, and a heat exchanger 30 for effecting heat transfer between the hydrogen stack system and the heating system, wherein,

the hydrogen reactor system comprises a radiator, a water pump and a hydrogen reactor device which are connected in sequence; the hydrogen reactor system also comprises a water tank, wherein a water inlet of the water tank is connected with the radiator, and a water outlet of the water tank is connected with a water inlet of the water pump; the hydrogen stack system generates electricity through the hydrogen stack device, converts hydrogen energy into electric energy for battery power supply, and the battery directly drives the motor to enable the vehicle to run.

The heating system comprises a water pump and at least one in-vehicle radiator which are sequentially connected, and the in-vehicle radiators are connected in series; the heating system further comprises a water tank, a water inlet of the water tank is connected with a water outlet of the radiator in the vehicle, and a water outlet of the water tank is connected with a water inlet of the water pump.

The heat exchanger is a dividing wall type heat exchanger, for example, a plate type heat exchanger; the dividing wall type heat exchanger enables two fluids with different temperatures to flow in the respective independent fluid cavities, and heat exchange is carried out between the fluids through heat conduction of the fluid cavity wall and convection of the fluids on the fluid cavity wall; in other application scenarios, the heat exchanger may also be at least one of a regenerative heat exchanger, a fluid connection indirect heat exchanger, and a direct contact heat exchanger; the heat exchanger comprises two independent cavities, namely a first fluid cavity and a second fluid cavity;

specifically, a water inlet of a first fluid cavity of the heat exchanger is connected with a water outlet of a hydrogen stack device in the hydrogen stack system, a water outlet of the first fluid cavity of the heat exchanger is connected with a water inlet of a radiator in the hydrogen stack system, and high-temperature deionized cooling water generated by the hydrogen stack device enters the first fluid cavity through the connection mode of the first fluid cavity; a water inlet of a second fluid cavity of the heat exchanger is connected with a water outlet of an in-vehicle radiator in the heating system, a water outlet of the second fluid cavity of the heat exchanger is connected with a water inlet of a water pump of the heating system, and the cooling liquid of the heating system enters the second fluid cavity through the connection mode of the second fluid cavity; the first fluid cavity and the second fluid cavity transfer and exchange heat through the contact area, so that waste heat generated by the hydrogen stack device is effectively recycled, and the purpose of heating in a vehicle is achieved.

According to the technical scheme, when the hydrogen reactor device generates high-temperature deionized cooling water, the heat of the hydrogen reactor system is transferred to the warm air system through the heat exchanger, the heating system sends the heat to the pipeline in the vehicle and the radiator in the vehicle, and the radiator works in the vehicle to realize the effect of effectively recycling the waste heat generated by the hydrogen reactor device.

Further, in order to avoid the phenomenon that the outlet temperature of the deionized cooling water of the hydrogen stack device is lower than the return water temperature of the antifreeze of the in-vehicle heating system, which causes reverse heat transfer, as shown in fig. 2, in a second embodiment of the present application, based on the first embodiment, the vehicle waste heat recovery system of the present application further includes: three-way solenoid valve 40, first temperature sensor 50, second temperature sensor 60 and controller; the three-way electromagnetic valve comprises a first port, a second port and a third port, the first port of the three-way electromagnetic valve is connected with a water inlet of a water pump of the heating system, the second port of the three-way electromagnetic valve is connected with a water inlet of a second fluid cavity of the heat exchanger, and the third port of the three-way electromagnetic valve is connected with a water outlet of an in-vehicle radiator of the heating system; when the hydrogen reactor device generates high-temperature deionized cooling water, the second port and the third port of the three-way electromagnetic valve are communicated, and heat of the hydrogen reactor system is transferred to a heating system through heat exchange inside the heat exchanger; when the temperature of the deionized cooling water outlet of the hydrogen reactor device is lower than the return water temperature of the antifreeze solution of the heating system, the first port and the third port of the three-way electromagnetic valve are switched and conducted, and the phenomenon of reverse heat transfer is avoided.

The first temperature sensor is positioned between the water outlet of the hydrogen reactor device and the water inlet of the first fluid cavity of the heat exchanger and is used for detecting a first temperature value of the water outlet of the hydrogen reactor device; the second temperature sensor is positioned between a third port of the three-way electromagnetic valve and a water outlet of an in-vehicle radiator in the heating system and is used for detecting a second temperature value of the water outlet of the in-vehicle radiator, wherein when the heating system comprises more than two in-vehicle radiators which are connected in series, the last in-vehicle radiator is connected with the third port of the three-way electromagnetic valve; and the second temperature sensor is positioned between the last water outlet of the in-vehicle radiator and the third port of the three-way electromagnetic valve and is used for detecting the temperature of the last water outlet of the in-vehicle radiator.

The controller is configured to determine whether a first temperature value is greater than a reference temperature value, conduct the second port and the third port of the three-way electromagnetic valve when the first temperature value is greater than the reference temperature value, and switch and conduct the first port and the third port of the three-way electromagnetic valve when the first temperature value is less than or equal to the reference temperature value, where the reference temperature value is a sum of the second temperature value and a preset value, and the preset value may be set according to actual development experience, for example, the preset value may be set to 5 ℃.

In the above-mentioned technical scheme of this embodiment, through increase tee bend solenoid valve, first temperature sensor, second temperature sensor and controller in vehicle waste heat recovery system, when hydrogen heap device produced high temperature deionization cooling water, control tee bend solenoid valve second port and third port switch on, through the inside heat transfer of heat exchanger, realize that hydrogen heap device heat passes to heating system, effectively utilize waste heat recovery to reach the purpose of heating in the car. When the hydrogen reactor device generates low-temperature deionized cooling water, the first port and the third port of the three-way electromagnetic valve are communicated, so that the phenomenon of reverse heat transfer is avoided.

The following is a third embodiment of the present application, and based on the second embodiment, in the third embodiment of the present application, the controller of the vehicle waste heat recovery system of the present application is further configured to, before determining whether the first temperature value is greater than the reference temperature value, obtain a power mode of the vehicle, and when the power mode of the vehicle is the second gear of the hydrogen fuel cell stack mode, execute the step of determining whether the first temperature value is greater than the reference temperature value.

Specifically, the power modes of the vehicle comprise a hydrogen fuel cell stack mode and a pure electric mode; the hydrogen fuel cell stack mode comprises a first gear and a second gear, and the operating power of the first gear is smaller than that of the second gear; in an actual application scene, a plurality of different gears can be set, the operating power corresponding to each gear is different, and the control effect is more accurate when the number of the set gears is larger; the method comprises the steps that before judging whether a first temperature value is larger than a reference temperature value, a power mode of a vehicle needs to be acquired; when the power mode of the vehicle is a second gear of the hydrogen fuel cell stack mode, judging whether the first temperature value is greater than a reference temperature value in real time to further control the on-off of the three-way electromagnetic valve; when the first temperature value is greater than the reference temperature value, closing a first port of the three-way electromagnetic valve, and switching on a second port and a third port of the three-way electromagnetic valve to realize waste heat recovery of the hydrogen reactor device; and when the first temperature value is less than or equal to the reference temperature value, switching and conducting the first port and the third port of the three-way electromagnetic valve, so that the phenomenon of reverse heat transfer is avoided.

In the above technical scheme of this embodiment, through obtaining the power mode of vehicle, when the power mode of vehicle is the second gear of hydrogen fuel cell stack mode, judge whether first temperature value is greater than the reference temperature value, realize knowing under the power mode of vehicle the prerequisite, further control the break-make of three-way solenoid valve, the effectual recycle that carries on the waste heat avoids appearing the phenomenon of reverse heat transfer simultaneously.

The following is a fourth embodiment of the present application, and based on the third embodiment, in the fourth embodiment of the present application, the controller of the vehicle waste heat recovery system of the present application is further configured to conduct the first port and the third port of the three-way electromagnetic valve when the power mode of the vehicle is the first gear of the hydrogen fuel cell stack mode, where an operating power of the first gear is smaller than an operating power of the second gear.

Specifically, the power mode of the vehicle needs to be acquired before judging whether the first temperature value is greater than the reference temperature value; when the power mode of the vehicle is the first gear of the hydrogen fuel cell stack mode, the temperature of the water outlet of the hydrogen stack device is low, the recoverable waste heat utilization amount is low, and the probability that the temperature of the deionized cooling water outlet of the hydrogen stack device is lower than the return water temperature of the antifreeze solution of the heating system in the vehicle is high; at this time, whether the first temperature value is greater than a reference temperature value can be judged; the first port and the third port of the three-way electromagnetic valve can be switched and conducted directly, so that the phenomenon that the heat of a heating system in the vehicle is reversely transmitted to the hydrogen stack device is avoided.

In the above technical scheme of this embodiment, by obtaining the power mode of the vehicle, when the power mode of the vehicle is the first gear of the hydrogen fuel cell stack mode, the first port and the third port of the three-way electromagnetic valve are connected, so that on the premise that the power mode of the vehicle is known, the on-off of the three-way electromagnetic valve is further controlled, and the phenomenon of reverse heat transfer is effectively avoided.

The following is a fifth embodiment of the present application, and based on the third embodiment, in the fifth embodiment of the present application, the controller of the vehicle waste heat recovery system of the present application is further configured to conduct the first port and the third port of the three-way electromagnetic valve when the power mode of the vehicle is the electric-only mode.

Specifically, the power modes of the vehicle comprise a hydrogen fuel cell stack mode and a pure electric mode; acquiring a power mode of the vehicle before judging whether the first temperature value is greater than a reference temperature value, wherein when the power mode of the vehicle is a pure electric mode, the temperature of a deionized cooling water outlet of the hydrogen reactor device is lower than the return water temperature of the antifreeze solution of a heating system in the vehicle, and the phenomenon of reverse heat transfer occurs; therefore, in order to avoid the phenomenon of reverse heat transfer, when the power mode of the vehicle is set to be the pure electric mode, the first port and the third port of the three-way electromagnetic valve are switched on, and the phenomenon of reverse heat transfer is avoided.

In the above technical scheme of this embodiment, through the power mode who obtains the vehicle, when the power mode of vehicle is pure electric mode, switch on the first port and the third port of three-way solenoid valve, the phenomenon of reverse heat transfer is effectually avoided appearing.

As shown in fig. 3, according to the second embodiment, in a sixth embodiment of the present application, the vehicle waste heat recovery system of the present application further includes an electric heater 70 connected in series between a water pump of the heating system and the in-vehicle radiator, and the electric heater is configured to provide heat to the interior of the vehicle.

Specifically, in order to avoid the phenomenon of reverse heat transfer, according to the present application, as in the third to fifth embodiments, when the temperature of the deionized cooling water outlet of the hydrogen stack device is lower than the return water temperature of the antifreeze solution for the in-vehicle heating system, the first port and the third port of the three-way solenoid valve are opened; however, when the temperature inside the heating system is low, the normal starting of the vehicle is not facilitated and the effect of vehicle heating cannot be realized; therefore, the electric heater is added in the heating system, the electric heater is connected between the water pump of the heating system and the radiator in the vehicle in series, and the third temperature sensor 80 is added for acquiring the third temperature value of the electric heater; it should be emphasized that the vehicle interior radiator of the present embodiment and the last vehicle interior radiator of the second embodiment may be the same vehicle interior radiator or different vehicle interior radiators; when the heating system includes at least two interior radiators, the interior radiator of the present embodiment is different from the last interior radiator in the second embodiment.

The electric heater realizes heating in the vehicle; the electric heater is a PTC electric heater, and heating in the vehicle is realized by heating the antifreeze through the PTC electric heater; in other application scenes, heating in the vehicle can be realized by adopting the modes of air-conditioning heating and PTC electric radiator heating.

In the above technical solution of this embodiment, the effect of heating in the vehicle is achieved by adding the electric heater to the heating system in the vehicle.

The following is a seventh embodiment of the present application, and based on the sixth embodiment, in the seventh embodiment of the present application, the controller of the vehicle waste heat recovery system of the present application is further configured to obtain a third temperature value of the water outlet of the electric heater after the second port and the third port of the three-way electromagnetic valve or the first port and the third port of the three-way electromagnetic valve are turned on, and start the electric heater when the third temperature value is smaller than a first preset temperature value.

Specifically, after the second port and the third port of the three-way electromagnetic valve are communicated or the first port and the third port of the three-way electromagnetic valve are communicated, a third temperature value of the water outlet of the electric heater is acquired by a third temperature sensor arranged at the water outlet of the electric heater, a first preset temperature value can be set, the first preset temperature value is a corresponding minimum temperature value when the electric heater is started, the first preset temperature value is calibrated according to the actual working condition of the electric heater, and when the third temperature value is smaller than the first preset temperature value, the electric heater is started; for example, the first preset temperature value is set to 65 ℃, when the obtained third temperature value of the water outlet of the electric heater is 60 ℃, because the third temperature value is smaller than the first preset temperature value, whether the electric heater is in an on state needs to be detected, and when the electric heater is in an off state, the electric heater is turned on.

According to the technical scheme, when the third temperature value of the water outlet of the electric heater is detected to be less than the first preset temperature value, the electric heater is started to heat the interior of the vehicle.

The following is an eighth embodiment of the present application, and based on the seventh embodiment, in the eighth embodiment of the present application, the controller of the vehicle waste heat recovery system of the present application is further configured to, after the electric heater is turned on, obtain a third temperature value of the water outlet of the electric heater, and when the currently obtained third temperature value is greater than a second preset temperature value, turn off the electric heater or reduce the power of the electric heater.

Specifically, when the electric heater is started for heating, a third temperature value of the water outlet of the electric heater is obtained in real time, so that the phenomenon that the energy consumption is increased due to the fact that the electric heater continues to heat when the third temperature value is too high is avoided; a second preset temperature value can be set, wherein the second preset temperature value is a maximum temperature value corresponding to the condition that the electric heater is turned off or the power of the electric heater is reduced, the second preset temperature value is calibrated according to the actual working condition of the electric heater, and when the third temperature value is greater than the second preset temperature value, the electric heater is turned off or the power of the electric heater is reduced; for example, the second preset temperature value is set to be 90 ℃, and when the acquired third temperature value of the water outlet of the electric heater is 95 ℃, the electric heater is turned off or the power of the electric heater is reduced because the third temperature value is greater than the second preset temperature value.

According to the technical scheme, when the third temperature value of the water outlet of the electric heater is detected to be greater than the second preset temperature value, the electric heater is turned off or the power of the electric heater is reduced, so that the energy consumption of the electric heater for continuously heating when the third temperature value is too high is reduced.

The following is a ninth embodiment of the present application, and based on the seventh embodiment, in the ninth embodiment of the present application, the controller of the vehicle waste heat recovery system of the present application is further configured to, after the electric heater is turned on, obtain a third temperature value of the water outlet of the electric heater, and when the currently obtained third temperature value is less than or equal to a second preset temperature value, adjust the operating mode of the electric heater to a heat preservation mode.

Specifically, the second preset temperature value is a maximum temperature value corresponding to the time when the electric heater is turned off or the power of the electric heater is reduced, and the second preset temperature value is set according to an actual situation; after the electric heater is started, acquiring a third temperature value of a water outlet of the electric heater, and adjusting the working mode of the electric heater to a heat preservation mode when the currently acquired third temperature value is less than or equal to a second preset temperature value; in other application scenarios, the working mode of the electric heater can be adjusted to the heat preservation mode within a preset time interval after the electric heater is started.

In this embodiment, according to the above technical solution, when the currently obtained third temperature value is less than or equal to a second preset temperature value, the working mode of the electric heater is adjusted to a heat preservation mode, so as to adjust the working mode of the electric heater.

FIG. 4 is a schematic diagram of the control logic of the controller in the vehicle waste heat recovery system of the present application; the control logic of the controller of the present application comprises in sequence:

firstly, step S110 is executed to obtain the power mode of the vehicle;

then, after the power mode of the vehicle is acquired, the type of the power mode of the vehicle is judged, and after the type of the power mode of the vehicle is acquired, the following steps are specifically executed:

step S210, when the power mode of the vehicle is the pure electric mode, conducting a first port and a third port of the three-way electromagnetic valve;

step S220, when the power mode of the vehicle is the first gear of the hydrogen fuel cell stack mode, conducting the first port and the third port of the three-way electromagnetic valve;

and step S230, judging whether the first temperature value is greater than a reference temperature value when the power mode of the vehicle is the second gear of the hydrogen fuel cell stack mode.

Wherein, each step of the steps S210-S320 is independent; the specific implementation manner of step S210 is as described in the fifth embodiment; the specific implementation manner of step S220 is as described in the fourth embodiment; the specific implementation of step S230 is as described in the third embodiment, and is not described herein again.

Next, based on step S230, after determining whether the first temperature value is greater than the reference temperature value, the following steps are performed:

step S310, when the first temperature value is greater than a reference temperature value, conducting a second port and a third port of the three-way electromagnetic valve;

and step S320, switching and conducting the first port and the third port of the three-way electromagnetic valve when the first temperature value is less than or equal to a reference temperature value.

Each of the steps S310 to S320 is independent, and the corresponding step is executed according to the determination result, which is not described herein again.

Finally, the control part of the electric heater executes the following steps after the first port and the third port of the three-way solenoid valve are conducted, or after the second port and the third port of the three-way solenoid valve are conducted, based on step S210, step S220, step 310 and step S320:

step S410, acquiring a third temperature value of the water outlet of the electric heater;

step S510, when the third temperature value is smaller than a first preset temperature value, starting the electric heater;

step S520, when the currently acquired third temperature value is greater than a second preset temperature value, the electric heater is turned off or the power of the electric heater is reduced;

step S530, when the currently obtained third temperature value is less than or equal to a second preset temperature value, adjusting the working mode of the electric heater to a heat preservation mode.

The specific implementation manner of step S510 is as described in the seventh embodiment; the specific implementation manner of step S520 is as described in the eighth embodiment; the specific implementation of step S530 is as described in the ninth embodiment, and is not described herein again.

While a logical order is shown in the flow chart, in some cases, the steps shown or described may be performed in a different order than presented herein.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.