Parking heater and control method thereof

Abstract

The invention provides a parking heater and a control method thereof, the parking heater comprises a combustor, an oil supply system and a first impeller, a cavity where the first impeller is located communicates with the combustor, and the oil supply system is used for providing fuel for the combustor; the control method comprises the following steps that a shutdown instruction is received, the oil supply system is controlled to stop supplying oil, and meanwhile the time delay step is executed; the time delay step comprises the steps that after the first impeller is controlled to continue running for a first preset duration, the first impeller is shut down; or, the first impeller is controlled to stop running, and after the first impeller stops running for the second preset duration and the first impeller is controlled to start running for the third preset duration, the first impeller is shut down; wherein the second preset duration is smaller than the first preset duration and the third preset duration, and the first preset duration and the third preset duration can be equal or unequal. According to the parking heater and the control method thereof, the problem of carbon deposition can be effectively solved, and the combustion efficiency of the combustor is improved.

Description

Technical Field

[0001] This application relates to the field of heating equipment technology, and in particular to a parking heater and its control method. Background Technology

[0002] With the continuous development of automotive technology and people's increasing demands for vehicle comfort, parking heaters are being used more and more widely in the automotive field. Parking heaters can provide warmth to the passenger compartment when the vehicle is parked, effectively improving the driving and riding environment in cold weather. They can also be used to preheat the engine, improving engine starting performance and reducing wear.

[0003] The main component of existing parking heaters is the fuel heat exchanger, which generates heat through the combustion of fuel to provide heating to users.

[0004] Fuel combustion typically occurs within the burner. The combustion process is as follows: the motor starts, driving the first and second impellers to rotate. The fuel injector injects fuel into the combustion chamber of the burner, the ignition plug ignites the fuel, and then the first impeller blows the high-temperature gas from inside the burner out, where it enters the heat exchanger for heat exchange. The second impeller draws in outside air into the fuel heat exchanger, where it undergoes heat exchange before being discharged. This discharged air then becomes the air to be heated before entering the parking heater.

[0005] In the process of developing this application, the inventors discovered that the prior art has at least the following problems: When controlling the parking heater or shutting down the fuel heat exchanger, the prior art control method typically directly cuts off the power. At this time, the motor and impeller completely stop working, and after the parking heater has been used for a period of time, carbon deposits are easily formed. This affects the combustion efficiency of the burner and also causes incomplete fuel combustion, resulting in problems such as white smoke from the heater. Summary of the Invention

[0006] Based on this, this application provides a parking heater and its control method to improve the problem of carbon buildup in existing parking heaters and increase combustion efficiency.

[0007] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows: On one hand, this application provides a control method for a parking heater, the parking heater including a burner, a fuel supply system, and a first impeller, wherein the cavity containing the first impeller is connected to the burner, and the fuel supply system is used to supply fuel to the burner; the control method includes the following steps: Upon receiving a shutdown command, the system controls the oil supply system to stop supplying oil, and simultaneously executes a delay step. The delay step includes: controlling the first impeller to continue running for a first preset time, and then shutting down the first impeller; or, controlling the first impeller to stop running, and after stopping for a second preset time, controlling the first impeller to start running for a third preset time, and then shutting down the first impeller; wherein the second preset time is less than the first preset time and the third preset time, and the first preset time and the third preset time may be equal or unequal.

[0008] In one embodiment, the first impeller is controlled to continue running for a first preset time or to start running for a third preset time, and the first impeller is controlled to increase its rotational speed.

[0009] In one embodiment, both the first preset duration and the third preset duration are not less than 5 seconds.

[0010] In one embodiment, the first preset duration and the third preset duration are 1 to 3 minutes, respectively.

[0011] In one embodiment, after the fuel supply system is stopped, the ignition plug of the burner is controlled to ignite at least once.

[0012] In one embodiment, after the oil supply system stops supplying oil, it is detected whether the burner has pumped oil after the last combustion. If so, the ignition plug is controlled to ignite, and the first impeller is made to run at a reduced speed, and then the ignition plug is controlled to close. If not, the current operating state remains unchanged.

[0013] In one embodiment, the parking heater includes a housing, and the burner and the first impeller are disposed within the housing; the control method further includes the following steps: When the first impeller continues to run for a first preset time or when the first impeller starts running for a third preset time, the casing temperature is continuously monitored until the casing temperature is not greater than the preset stop temperature, and the first impeller runs for the first preset time or the third preset time, at which point the first impeller is shut down.

[0014] On the other hand, embodiments of this application provide a parking heater, which is controlled using the control method described above.

[0015] In one embodiment, the parking heater includes a main housing, a fuel heat exchanger and a fuel supply system respectively disposed within the main housing. The fuel heat exchanger includes a burner, a first impeller, a drive motor, and a main control board. The drive motor is used to drive the first impeller to rotate, and the main control board is used to control the parking heater. The fuel supply system includes a fuel tank and a fuel pump. One end of the fuel pump is connected to the fuel tank, and the other end is connected to the fuel injector of the burner, for delivering fuel from the fuel tank to the burner.

[0016] In one embodiment, the parking heater further includes an energy storage power source, which has an energy storage function and is used to continue supplying power to the parking heater when the external power supply stops.

[0017] This application has at least the following beneficial effects: The parking heater and its control method provided in this application, upon receiving a shutdown command, immediately stop supplying oil to the burner. Simultaneously, it controls the first impeller to first stop running and then restart for a period of time, or controls the first impeller to run continuously for a period of time. That is, after combustion in the burner ends, the first impeller continues to blow air into the burner to expel all oil mist, soot, and high-temperature gases remaining from the previous combustion, preventing oil mist and soot from remaining on the inner wall of the burner and forming carbon deposits. The control method for the parking heater provided in this application does not require changing the original structure of the parking heater, and its control steps are simple, effectively preventing carbon deposit formation, thereby improving fuel combustion efficiency and ensuring the safe and stable operation of the parking heater. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the parking heater according to an embodiment of this application.

[0019] Figure 2 This is a flowchart illustrating the control method for the parking heater according to an embodiment of this application.

[0020] The meanings of the labels in the attached diagram are as follows: 10. Housing; 11. Air inlet; 12. Air outlet; 20. Combustion chamber; 21. Open end; 31. Air inlet; 32. Air outlet; 33. First chamber; 34. Second chamber; 35. First impeller; 50. Drive motor; 51. First output shaft; 52. Second output shaft; 53. Second impeller. Detailed Implementation

[0021] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Unless otherwise defined, 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 specification of this application is for the purpose of describing particular embodiments only and is not intended to limit the ways in which this application may be implemented. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] In the description of this application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] Please see Figure 1 The parking heater in this embodiment includes a burner, an oil supply system and a first impeller 35. The cavity containing the first impeller 35 is connected to the burner, and the oil supply system is used to provide fuel to the burner.

[0026] Specifically, the parking heater in this embodiment includes a main housing and a fuel heat exchanger and a fuel supply system respectively disposed in the main housing.

[0027] The fuel heat exchanger includes a housing 10, and a burner, a first impeller 35, a second impeller 53, a heat exchanger, a drive motor 50, and a main control board (not shown) respectively disposed within the housing 10. The drive motor 50 is used to drive the first impeller 35 and / or the second impeller 53 to rotate. For example, the drive motor 50 may include a first output shaft 51 and a second output shaft 52 coaxially arranged, with the first output shaft 51 drivingly connected to the first impeller 35, and the second output shaft 52 drivingly connected to the second impeller 53. Of course, in other embodiments, two drive motors 50 may also be provided, with the first impeller 35 and the second impeller 53 each controlled by a drive motor 50, so that the start and stop of the first impeller 35 and the second impeller 53 can be controlled independently. The top of the housing 10 is provided with an air outlet 12, and the bottom is provided with an air inlet 11. Outside air enters the housing 10 through the air inlet 11, and the heat exchanger heats the air before it flows out through the air outlet 12. Outside air enters the fuel heat exchanger through the air inlet 11. The incoming air comes into contact with the walls of the heat exchange chamber. The heat exchange chamber utilizes the heat carried by the high-temperature gas flowing from the combustion chamber 20 of the burner to exchange heat with the incoming cold air through heat conduction, gradually raising the temperature of the cold air and turning it into hot air. The heated air then flows out through the air outlet 12 on the casing 10, providing warm air for environments requiring heating. The combustion chamber 20 includes an open end 21 and a closed end. The open end 21 faces the air outlet 12, and the closed end houses the combustion section.

[0028] The heat exchanger has a hollow heat exchange chamber located between the casing 10 and the combustion chamber 20. An air inlet 31 and an air outlet 32 ​​are located on the side wall of the heat exchange chamber. The air inlet 31 communicates with the combustion section, and the air outlet 32 ​​is located at the open end 21. The heat exchange chamber includes a first chamber 33 and a second chamber 34. The first chamber 33 is connected to the air outlet 32, and the second chamber 34 is connected to the air inlet 31. The first chamber 33 and the second chamber 34 are separated by a partition. A first impeller 35 is located at the bottom of the second chamber 34. The first chamber 33 is used for heat exchange with the outside air.

[0029] The main control board is used to control the parking heater. The main control board is electrically connected to the drive motor 50, the burner and the fuel supply system.

[0030] The fuel supply system includes a fuel tank and a fuel pump. One end of the fuel pump is connected to the fuel tank, and the other end is connected to the fuel injector of the burner, which is used to deliver fuel from the fuel tank to the burner.

[0031] In some embodiments, the parking heater also includes a power storage device with an energy storage function, used to continue supplying power to the parking heater when the external power supply fails. For example, the power storage device can be electrically connected to the main control board, and may include a rechargeable battery. When the vehicle loses power or other circumstances cause the external power supply to stop supplying power to the main control board, to avoid delay steps failing to complete, the main control board can be powered by the power storage device to ensure the normal operation of the control process.

[0032] like Figure 2 As shown in the figure, this application embodiment also provides a control method for a parking heater, including the following steps: Upon receiving a shutdown command, the system controls the oil supply system to stop supplying oil, and simultaneously executes a delay step. The delay steps include: controlling the first impeller 35 to continue running for a first preset time, and then shutting down the first impeller 35; or, controlling the first impeller 35 to stop running, and after stopping for a second preset time, controlling the first impeller 35 to start running for a third preset time, and then shutting down the first impeller 35; wherein the second preset time is less than the first preset time and the third preset time, and the first preset time and the third preset time may be equal or unequal.

[0033] Specifically, upon receiving a shutdown command, the parking heater immediately stops the oil pump and the fuel injector. Simultaneously, the drive motor 50 continues to operate, driving the first impeller 35 to rotate continuously. After the first impeller 35 has operated for a first preset duration, the drive motor 50 and the first impeller 35 are de-energized and stopped. Alternatively, upon receiving the shutdown command, the drive motor 50 (i.e., the first impeller 35) can be briefly shut off, and then the first impeller 35 can be restarted. After the first impeller 35 has operated for a third preset duration, the drive motor 50 and the first impeller 35 are de-energized and stopped. The preferred solution is to continue operating the first impeller 35 for the first preset duration upon receiving the shutdown command. Both the first and third preset durations are not less than 5 seconds; for example, the first and third preset durations can be set to 1 to 3 minutes respectively, preferably 1 to 2 minutes respectively. If the first impeller 35 delay time is too long, it will waste energy, while if it is too short, the residual exhaust gas will not be completely blown out, reducing the effect of preventing carbon buildup.

[0034] In some embodiments, the control method for the parking heater further includes the following steps: controlling the first impeller 35 to continue running for a first preset time or controlling the first impeller 35 to start running for a third preset time, and controlling the first impeller 35 to increase its rotational speed.

[0035] For example, the rotational speed of the first impeller 35 when it is heating with the parking heater is the first rotational speed, and the rotational speed during the delayed operation (controlling the first impeller 35 to continue running for a first preset time or controlling the first impeller 35 to start running for a third preset time) is the second rotational speed. The second rotational speed is greater than the first rotational speed, that is, the speed is increased relative to the first rotational speed. The first rotational speed can be, for example, 2000-3500 rpm, and the second rotational speed can be 4000 rpm.

[0036] By delaying the shutdown of the first impeller 35, air continues to blow into the burner after combustion has finished, expelling residual oil mist, soot, and high-temperature gases, thus preventing these substances from accumulating on the burner's inner wall and forming carbon deposits. Increasing the airflow velocity further removes all residual exhaust gases and other impurities from the burner, resulting in a better anti-carbon buildup effect.

[0037] In some embodiments, the control method for the parking heater further includes the following step: after the fuel supply system stops supplying fuel, controlling the ignition plug of the burner to ignite at least once. Ignition by the ignition plug ensures complete combustion of the remaining fuel in the burner, thereby achieving a better effect in preventing carbon buildup.

[0038] Specifically, after the fuel supply system stops supplying fuel, the ignition plug can be controlled to ignite immediately, while a delay step is executed simultaneously.

[0039] Alternatively, in some embodiments, after the control oil supply system stops supplying oil, it is detected whether the burner has pumped oil after the last combustion. If so, the ignition plug is controlled to ignite, and the first impeller 35 is made to run at a reduced speed, and then the ignition plug is controlled to close. If not, the current operating state remains unchanged.

[0040] For example, the oil pump can be monitored via the controller on the main control board to determine whether oil has been pumped into the burner since the last combustion cycle. If oil has been pumped, the ignition plug is controlled to ignite the burner, while the first impeller 35 is kept running at a third speed, lower than the first speed. After a preset low-speed operation time (e.g., 1 minute), the ignition plug is controlled to shut off, followed by a delay step. If no oil has been pumped into the burner, no operation is required, and the normal procedure can continue. The third speed could be, for example, 1500 rpm.

[0041] In some embodiments, the method for controlling the parking heater further includes the following steps: When the first impeller 35 continues to run for a first preset time or when the first impeller 35 starts running for a third preset time, the temperature of the casing 10 is continuously monitored until the temperature of the casing 10 is not greater than the preset stop temperature, and the first impeller 35 runs for the first preset time or the third preset time, then the first impeller 35 is shut down.

[0042] For example, a temperature sensor can be installed on the main control board to detect the temperature of the housing 10. During the delay step, the temperature sensor continuously monitors the temperature of the housing 10 and sends the temperature detection result to the controller. The controller determines whether the temperature of the housing 10 has been reduced to the preset stop temperature range based on the preset stop temperature. For example, the preset stop temperature can be set to 50℃. When the temperature of the housing 10 is below 50℃, the preset stop temperature range has been reached. At this time, if the running time of the first impeller 35 has also reached the requirements of the first preset time or the third preset time, the first impeller 35 can be controlled to stop rotating. Reducing the temperature of the housing 10 before shutting down the first impeller 35 can avoid safety problems caused by the housing 10 being too hot.

[0043] Specific Implementation Example 1: The control method for the parking heater in this embodiment includes the following steps (e.g.) Figure 2 (as shown) S1. The controller receives a shutdown command.

[0044] S2. The controller controls the oil pump to stop pumping oil. The controller detects the oil pump to determine whether oil has been pumped into the burner after the last combustion. If oil is pumped into the burner, the ignition plug is controlled to ignite, and the drive motor 50 is controlled to drive the first impeller 35, so that the first impeller 35 runs at a third speed lower than the first speed. After running at low speed for a preset time (e.g., 30 seconds), the ignition plug is controlled to close and a delay step is executed; the first speed is 3000 rpm and the third speed is 1000 rpm. If no oil has been pumped into the burner, proceed directly to the delay step; Delay procedure: The first impeller 35 is controlled to continue running at a second speed higher than the first speed for a first preset time, and the temperature of the housing 10 is continuously monitored. When the temperature of the housing 10 is not higher than the preset stop temperature, and the first impeller 35 has run at the second speed for the first preset time, the parking heater is turned off. The second speed is 4500 rpm, the preset stop temperature is 45℃, and the first preset time is 1.5 minutes.

[0045] The parking heater provided in this application embodiment has a simple structure and a simple and reliable control method. It can effectively reduce the formation of carbon deposits, improve the combustion efficiency of the burner, make the fuel burn more completely, and reduce energy consumption.

[0046] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0047] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A control method for a parking heater, characterized in that, The parking heater includes a burner, a fuel supply system, and a first impeller. The cavity containing the first impeller is connected to the burner. The fuel supply system is used to supply fuel to the burner. The control method includes the following steps: Upon receiving a shutdown command, the system controls the oil supply system to stop supplying oil, and simultaneously executes a delay step. The delay step includes: controlling the first impeller to continue running for a first preset time, and then shutting down the first impeller; or, controlling the first impeller to stop running, and after stopping for a second preset time, controlling the first impeller to start running for a third preset time, and then shutting down the first impeller; wherein the second preset time is less than the first preset time and the third preset time, and the first preset time and the third preset time may be equal or unequal.

2. The control method for the parking heater as described in claim 1, characterized in that, When the first impeller continues to run for a first preset time or when the first impeller starts running for a third preset time, the first impeller is controlled to increase its speed.

3. The control method for the parking heater as described in claim 1, characterized in that, Both the first preset duration and the third preset duration are not less than 5 seconds.

4. The control method for the parking heater as described in claim 3, characterized in that, The first preset duration and the third preset duration are 1 to 3 minutes, respectively.

5. The control method for the parking heater as described in claim 1, characterized in that, After the fuel supply system stops supplying fuel, the ignition plug of the burner is controlled to ignite at least once.

6. The control method for the parking heater as described in claim 1, characterized in that, After the oil supply system stops supplying oil, it is detected whether the burner has pumped oil after the last combustion. If so, the ignition plug is controlled to ignite, and the first impeller is made to run at a reduced speed. Then, the ignition plug is controlled to close. If not, the current operating state remains unchanged.

7. The control method for a parking heater as described in any one of claims 1 to 6, characterized in that, The parking heater includes a housing, and the burner and the first impeller are disposed within the housing; the control method further includes the following steps: When the first impeller continues to run for a first preset time or when the first impeller starts running for a third preset time, the casing temperature is continuously monitored until the casing temperature is not greater than the preset stop temperature, and the first impeller runs for the first preset time or the third preset time, at which point the first impeller is shut down.

8. A parking heater, characterized in that, Control is performed using the control method described in any one of claims 1 to 7.

9. The parking heater as described in claim 8, characterized in that, The system includes a main housing, a fuel heat exchanger disposed within the main housing, and a fuel supply system. The fuel heat exchanger includes a burner, a first impeller, a drive motor, and a main control board. The drive motor drives the first impeller to rotate, and the main control board controls the parking heater. The fuel supply system includes a fuel tank and a fuel pump. One end of the fuel pump is connected to the fuel tank, and the other end is connected to the fuel injector of the burner, for delivering fuel from the fuel tank to the burner.

10. The parking heater as described in claim 8 or 9, characterized in that, It also includes an energy storage power source, which has an energy storage function and is used to continue supplying power to the parking heater when the external power supply stops.

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