Vehicle heating system and vehicle

Abstract

The utility model relates to the technical field of vehicles, and discloses a vehicle warm air system and a vehicle, the vehicle warm air system comprises an engine, a heat dissipation device and a control device, the engine is provided with a liquid inlet for cooling liquid to flow in and a liquid outlet for cooling liquid to flow out, and the liquid inlet and the liquid outlet are communicated through a first circulation branch; the heat dissipation device comprises a radiator and a second circulation branch connected with the first circulation branch in parallel, the radiator is arranged on the second circulation branch, the control device comprises a controller and an electric control valve, the first circulation branch and the second circulation branch are both connected with the electric control valve, and the electric control valve is used for controlling connection or disconnection of the first circulation branch and the second circulation branch. The controller is used for controlling the closing proportion of the electric control valve according to the rotating speed of the engine. According to the utility model, the pressure difference between the liquid outlet and the liquid inlet of the engine can be increased, so that the water flow of the engine and the flow of warm air cooling liquid are increased, the flow of the warm air cooling liquid is ensured, the warm air effect is improved, and the comfort level of users is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a vehicle heating system and a vehicle. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] At present, when the temperature is low, the vehicle heating system uses an electric heater to heat the coolant and uses an electronic water pump to transfer the coolant to provide heating to the vehicle. The existing heating system is generally equipped with a water pump and a thermostat. The heating water is generally taken in before the thermostat and returned to the water pump. The thermostat is turned on or off according to the water temperature of the engine. In the low temperature stage, the pressure difference between the heating water taken in and the returned water is small, and the water flow through the heating is small, resulting in the heating air not being hot when the water temperature is low, affecting the user experience. Utility Model Content

[0004] The purpose of the utility model is to at least solve the problem that the pressure difference between the warm air and the return water is small in the low temperature stage, resulting in the warm air not being hot. This purpose is achieved through the following technical solutions:

[0005] The first aspect of the utility model provides a vehicle heating system, comprising:

[0006] An engine, the engine having a liquid inlet for coolant to flow in and a liquid outlet for coolant to flow out, the liquid inlet and the liquid outlet being connected via a first circulation branch;

[0007] A heat dissipation device, comprising a radiator and a second circulation branch, wherein the second circulation branch is connected in parallel with the first circulation branch, the radiator is arranged on the second circulation branch, and the radiator is used to provide heat to the vehicle cab;

[0008] A control device includes a controller and an electrically controlled valve electrically connected to the controller, wherein the first circulation branch and the second circulation branch are both connected to the electrically controlled valve, the electrically controlled valve is used to control the conduction or isolation of the first circulation branch and the second circulation branch, and the controller is used to control the closing ratio of the electrically controlled valve according to the rotational speed of the engine.

[0009] The vehicle heating system of the utility model is provided with a first circulation branch, a second circulation branch and an electric control valve. During the startup phase, the engine water temperature is low, and the second circulation branch is closed by the electric control valve, so that the coolant does not pass through the radiator. The coolant flows back to the engine through the first circulation branch and circulates again. When the vehicle cab turns on the heating, the second circulation branch is closed by the electric control valve. At the same time, the controller controls the closing ratio of the electric control valve arranged on the first circulation branch according to the engine speed. Since the engine water flow rate is positively correlated with the engine speed, the closing ratio of the electric control valve on the first circulation branch is related to the engine speed. The lower the engine speed, the greater the closing ratio of the electric control valve, which increases the pressure difference between the engine outlet and the inlet, thereby increasing the engine water flow rate, and increasing the warm air coolant flow rate, ensuring the warm air coolant flow rate, improving the warm air effect, and enhancing the user comfort.

[0010] In addition, the vehicle heating system according to the utility model may also have the following additional technical features:

[0011] In some embodiments of the present invention, the electronically controlled valve includes a first electronically controlled valve and a second electronically controlled valve electrically connected to the controller, the first electronically controlled valve is arranged on the first circulation branch, the second electronically controlled valve is arranged on the second circulation branch and is arranged between the engine and the radiator.

[0012] In some embodiments of the utility model, the electrically controlled valve includes a three-way valve, a first interface of the three-way valve is connected to the liquid outlet, a second interface of the three-way valve is connected to the first circulation branch, and a third interface of the three-way valve is connected to the second circulation branch, and the three-way valve can connect the second interface with the third interface and the first interface.

[0013] In some embodiments of the present invention, the heat dissipation device further includes a fan, which is disposed on one side of the heat sink and is used to drive air flow through the heat sink.

[0014] In some embodiments of the present invention, the control device further includes a rotation speed sensor, which is disposed on the engine crankshaft and electrically connected to the controller, and is used to detect the rotation speed of the engine crankshaft.

[0015] In some embodiments of the utility model, the vehicle heating system also includes a heating device and a delivery pipeline, the liquid outlet is connected to the heating device through the delivery pipeline, the heating device has an air inlet and an air outlet, the air inlet is arranged opposite to the radiator, and the air outlet is arranged in the driving cab of the vehicle.

[0016] The vehicle heating system further includes a main pipe, a liquid inlet end of the main pipe is connected to the liquid outlet, and a liquid outlet end of the main pipe is connected to the first circulation branch and the second circulation branch respectively.

[0017] In some embodiments of the present utility model, a pump source is provided on the main pipe, and the outlet of the pump source is connected to the liquid inlet.

[0018] In some embodiments of the present utility model, the vehicle heating system further includes a temperature sensor, which is disposed at the liquid outlet and is used to detect the temperature of the medium flowing out of the engine.

[0019] Another aspect of the present invention provides a vehicle, comprising a vehicle body and a vehicle heating system as described in any one of the above items, wherein the vehicle heating system is arranged on the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0021] Figure 1 The structure diagram of a vehicle heating system according to an embodiment of the utility model is schematically shown;

[0022] Figure 2 The structure diagram of another vehicle heating system according to an embodiment of the utility model is schematically shown;

[0023] Figure 3 A diagram schematically shows the relationship between the engine speed and the closing ratio of the electric control valve of the vehicle heating system according to the embodiment of the utility model;

[0024] Figure 4 The flowchart of the control method of the vehicle heating system according to the embodiment of the utility model is schematically shown.

[0025] The reference numerals are as follows:

[0026] 10. Engine; 11. First circulation branch; 12. Pump source;

[0027] 20. Radiator; 21. Second circulation branch;

[0028] 30. First electric control valve; 31. Second electric control valve; 32. Three-way valve;

[0029] 40. Warm air device; 41. Delivery pipeline;

[0030] 5. Main road;

[0031] 6. Fan. DETAILED DESCRIPTION

[0032] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0033] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0034] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0035] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0036] At present, when the temperature is low, the vehicle heating system uses an electric heater to heat the coolant and uses an electronic water pump to transfer the coolant to provide heating to the vehicle. The existing heating system is generally equipped with a water pump and a thermostat. The heating water is generally taken in before the thermostat and returned to the water pump. The thermostat is turned on or off according to the water temperature of the engine. After driving at low temperatures, the thermostat closes the large circulation and the coolant does not go to the radiator. When the temperature is high, the thermostat is turned on and the coolant goes to the thermostat. During the low-temperature stage of driving, the coolant does not go through the large circulation, which makes the pressure difference between the heating water taken in and the water returned small, and the water flow through the heating is small, resulting in the heating air not being hot when the water temperature is low, affecting the user experience.

[0037] In view of this, the present embodiment provides a vehicle heating system, which aims to solve the above-mentioned technical problems by setting an electrically controlled valve on the first circulation branch 11 and the second circulation branch 21. The electrically controlled valve can control the conduction or isolation of the first circulation branch 11 and the second circulation branch 21. The controller controls the closing ratio of the electrically controlled valve set on the first circulation branch 11 according to the rotation speed of the engine 10, so as to increase the pressure difference between the liquid outlet and the liquid inlet of the engine 10, improve the heating effect, and thus solve the above-mentioned technical problems.

[0038] like Figure 1 As shown, according to an embodiment of the utility model, a vehicle heating system is proposed, which includes an engine 10, a heat dissipation device and a control device. The engine 10 has a liquid inlet for coolant to flow in and a liquid outlet for coolant to flow out, the liquid inlet and the liquid outlet are connected through a first circulation branch 11, the heat dissipation device includes a radiator 20 and a second circulation branch 21, the second circulation branch 21 is connected in parallel with the first circulation branch 11, the radiator 20 is arranged on the second circulation branch 21, the radiator 20 is used to provide heat to the vehicle cab, the control device includes a controller and an electric control valve electrically connected to the controller, the first circulation branch 11 and the second circulation branch 21 are both connected to the electric control valve, the electric control valve is used to control the conduction or isolation of the first circulation branch 11 and the second circulation branch 21, and the controller is used to control the closing ratio of the electric control valve according to the rotation speed of the engine 10.

[0039] The vehicle heating system of the present invention is provided with a first circulation branch 11, a second circulation branch 21 and an electric control valve. During the start-up phase, the water temperature of the engine 10 is low, and the second circulation branch 21 is closed by the electric control valve, so that the coolant does not pass through the radiator 20. The coolant flows back to the engine 10 through the first circulation branch 11 and circulates again. When the heating of the vehicle cab is turned on, the second circulation branch 21 is closed by the electric control valve. At the same time, the controller controls the closing ratio of the electric control valve arranged on the first circulation branch 11 according to the rotation speed of the engine 10. Since the water flow of the engine 10 is positively correlated with the speed of the engine 10, the smaller the closing ratio of the electric control valve on the first circulation branch 11 is, the greater the water flow of the engine 10 is. Therefore, the closing ratio of the electric control valve set on the first circulation branch 11 is negatively correlated with the speed of the engine 10. The lower the speed of the engine 10, the greater the closing ratio of the electric control valve. The electric control valve controls the flow and pressure of the coolant according to the closing ratio, so that the pressure difference at both ends of the liquid outlet and the liquid inlet of the engine 10 increases, thereby increasing the water flow of the engine 10 and increasing the pressure difference at both ends of the water return of the heating device 40, so that the warm air coolant flow is increased, the warm air coolant flow is guaranteed, the warm air effect is improved, and the user comfort is improved.

[0040] In some embodiments of the present invention, the control device also includes a speed sensor, which is arranged on the crankshaft of the engine 10 and is electrically connected to the controller. The speed sensor is used to detect the speed of the crankshaft of the engine 10 and feed back the detected crankshaft speed of the engine 10 to the controller. The controller controls the first electronically controlled valve 30 and the second electronically controlled valve 31 according to the crankshaft speed of the engine 10, thereby increasing the pressure difference at both ends of the warm air return water.

[0041] In this embodiment, the vehicle heating system further includes a main line 5 and a pump source 12. The liquid inlet end of the main line 5 is connected to the liquid outlet, and the liquid outlet end of the main line 5 is respectively connected to the first circulation branch 11 and the second circulation branch 21. The outlet of the pump source 12 is connected to the liquid inlet. In this embodiment, the pump source 12 is a water pump, which is used as a power source to circulate the coolant flowing out of the engine 10 through the main line, the first circulation branch 11 and the second circulation branch 21.

[0042] like Figure 1As shown, in a feasible embodiment of the present utility model, the electric control valve includes a first electric control valve 30 and a second electric control valve 31 electrically connected to the controller, the first electric control valve 30 is arranged on the first circulation branch 11, the second electric control valve 31 is arranged on the second circulation branch 21, and is arranged between the engine 10 and the radiator 20. Specifically, the first electric control valve 30 is arranged on the first circulation branch 11, and the second electric control valve 31 is arranged on the second circulation branch 21. The first electric control valve 30 is used to control the conduction or isolation of the first circulation branch 11, and the second electric control valve 31 is used to control the conduction or isolation of the second circulation branch 21. The controller can control the opening and closing of the first electric control valve 30 according to the speed of the engine 10, thereby controlling the connection and disconnection of the first circulation branch 11. During the start-up phase, the water temperature of the engine 10 is relatively low, and the second electrically controlled valve 31 arranged on the second circulation branch 21 is closed, so that the coolant does not pass through the radiator 20. The coolant flows back to the engine 10 through the first circulation branch 11, and after another circulation, when the heater is turned on in the vehicle cab, the second electrically controlled valve 31 is closed. At the same time, the controller controls the closing ratio of the first electrically controlled valve 30 arranged on the first circulation branch 11 according to the speed of the engine 10, that is, controls the first electrically controlled valve 30 to be opened from 100% to closed by a%. Since the water flow rate of the engine 10 is positively correlated with the speed of the engine 10, the closing ratio of the first electrically controlled valve 30 is negatively correlated with the speed of the engine 10. The controller pre-stores the relationship between the speed of the engine 10 and the closing ratio of the electrically controlled valve, and the controller controls the closing ratio of the first electrically controlled valve 30. The lower the speed of the engine 10, the greater the closing ratio a% of the first electronically controlled valve 30, which means that the pressure difference between the liquid outlet and the liquid inlet of the engine 10 is greater, increasing the warm air return water pressure difference, increasing the warm air coolant flow rate, and improving the warm air effect.

[0043] Figure 3 : is a graph showing the relationship between the engine speed and the closing ratio of the electronically controlled valve. The horizontal axis is the engine speed 10, and the vertical axis is the closing ratio of the first electronically controlled valve 30. Figure 3As shown, when the speed of the engine 10 is 600 rpm, the closing ratio of the corresponding electric control valve is 80%. At this time, the controller controls the first electric control valve 30 to control the flow and pressure of the coolant according to the closing ratio. When the speed of the engine 10 is 1200 rpm, the closing ratio of the corresponding electric control valve is 50%. At this time, the controller controls the first electric control valve 30 to control the flow and pressure of the liquid according to the closing ratio. When the water temperature is slightly high and the warm air effect can be guaranteed, the first electric control valve 30 is fully opened, the first circulation branch 11 is opened, the water temperature continues to rise, the second electric control valve 31 begins to open the second circulation branch 21, the first electric control valve 30 closes the first circulation branch 11, and finally the second circulation branch 21 is opened and the first circulation branch 11 is closed. In this embodiment, the first electric control valve 30 and the second electric control valve 31 are both ball valves. In other embodiments, the first electric control valve 30 and the second electric control valve 31 can also be butterfly valves, gate valves, etc.

[0044] like Figure 2 As shown, in another feasible embodiment of the utility model, the electric control valve includes a three-way valve 32, the first interface of the three-way valve 32 is connected to the liquid outlet of the engine 10, the second interface of the three-way valve 32 is connected to the first circulation branch 11, and the third interface of the three-way valve 32 is connected to the second circulation branch 21. The three-way valve can make the second interface and / or the third interface communicate with the first interface. Specifically, the three-way valve 32 is a T-type electric three-way ball valve, and the three-way valve 32 is electrically connected to the controller. In the start-up stage, the coolant from the engine 10 flows into the three-way valve 32 through the main line 5. At this time, the three-way valve 32 makes the second circulation branch 21 a closed-circuit state, and the three-way valve 32 is connected to the first interface through the second interface, so that the first circulation branch 11 is in a passage state; hot water flows into the first circulation branch 11, returns to the water pump through the first circulation branch 11, and enters the engine 10 again for circulation. When the warm air is turned on, the second interface of the three-way valve 32 is closed by a%. The greater the closing ratio a%, the greater the pressure difference between the two ends of the warm air return water, and the greater the warm air coolant flow. When the water temperature is slightly higher and the warm air effect can be guaranteed, the second interface of the three-way valve 32 is connected to the first interface, so that the first circulation branch 11 is fully opened. The first circulation branch 11 is completely opened, and the water temperature continues to rise. The third interface of the three-way valve 32 is connected to the first interface, so that the second circulation branch 21 begins to open, and the first circulation branch 11 is closed at the same time. Finally, the second circulation branch 21 is completely opened, and the first circulation branch 11 is completely closed.

[0045] In some embodiments of the utility model, the heat dissipation device further includes a fan 6, which is disposed on one side of the radiator 20 and is used to drive airflow to flow through the radiator 20. Specifically, the radiator 20 is used to generate heat energy, which can be used as a heat source for warm air. The fan is disposed on the engine 10, and the fan is disposed opposite to the radiator 20. The fan drives airflow to flow through the radiator 20 and dissipates the coolant flowing into the radiator 20, thereby generating warm air.

[0046] In some embodiments of the utility model, the vehicle heating system also includes a heating device 40 and a delivery pipeline 41. The liquid outlet is connected to the heating device 40 through the delivery pipeline 41. The heating device 40 has an air inlet and an air outlet. The air inlet is arranged opposite to the radiator 50. The air outlet is arranged in the vehicle's cab. The warm air generated by the fan 6 blowing toward the radiator 20 is discharged into the cab through the air outlet.

[0047] In some embodiments of the utility model, the vehicle heating system also includes a temperature sensor, which is arranged at the liquid outlet of the engine 10. The temperature sensor is electrically connected to the controller. The temperature sensor is used to detect the temperature of the coolant flowing out of the engine 10 in real time and feed back the detected coolant temperature to the controller.

[0048] When the vehicle heating system of the utility model is controlled, the engine 10 is started, the speed sensor detects the speed of the engine 10, and feeds back the speed information to the controller, and at the same time, the heating or urea thawing is turned on, the temperature sensor detects the temperature of the water flowing out of the engine 10, and feeds back the water temperature to the controller, and the controller determines whether the water temperature is lower than T1. If the water temperature is lower than T1, the controller controls the second electric control valve 31 to close the second circulation branch 21 according to the engine speed, and controls the first electric control valve 30 to open a%; if the water temperature is not lower than T1, it determines whether the water temperature is lower than T2. ​​If the water temperature is lower than T1, the controller controls the second electric control valve 31 to close the second circulation branch 21 according to the engine speed, and controls the first electric control valve 30 to open a%. At T2, the controller controls the second electronically controlled valve 31 to close the second circulation branch 21 according to the engine speed, and controls the first electronically controlled valve 30 to fully open the first circulation branch 11; if the water temperature is not lower than T2, it is determined whether the water temperature is lower than T3. If the water temperature is lower than T3, the controller controls the second electronically controlled valve 31 to open b% according to the engine speed, and controls the first electronically controlled valve 30 to close 1-b%; if the water temperature is not lower than T3, the controller controls the second electronically controlled valve 31 to open the second circulation branch 21 according to the engine speed, and controls the first electronically controlled valve 30 to close the first circulation branch 11.

[0049] The second aspect of the utility model provides a vehicle, comprising a vehicle body and the above-mentioned vehicle heating system, wherein the vehicle heating system is arranged on the vehicle body. Of course, the vehicle also has structures and components that all existing vehicles have, and since this embodiment does not involve these structures and components, they are not described in detail.

[0050] The vehicle of the present invention is provided with a vehicle heating system, which utilizes the correlation between the engine 10 rotation speed and the coolant flow rate, and uses an electric control valve to proportionally close the first circulation branch 11, thereby increasing the pressure difference at both ends of the warm air return water, ensuring the warm air water flow rate, enhancing the warm air effect, and improving customer comfort.

[0051] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A vehicle heating system, characterized in that: include: An engine, the engine having a liquid inlet for coolant to flow in and a liquid outlet for coolant to flow out, the liquid inlet and the liquid outlet being connected via a first circulation branch; A heat dissipation device, comprising a radiator and a second circulation branch, wherein the second circulation branch is connected in parallel with the first circulation branch, the radiator is arranged on the second circulation branch, and the radiator is used to provide heat to the vehicle cab; A control device includes a controller and an electrically controlled valve electrically connected to the controller, wherein the first circulation branch and the second circulation branch are both connected to the electrically controlled valve, the electrically controlled valve is used to control the conduction or isolation of the first circulation branch and the second circulation branch, and the controller is used to control the closing ratio of the electrically controlled valve according to the rotational speed of the engine.

2. The vehicle heating system according to claim 1, characterized in that: The electrically controlled valve includes a first electrically controlled valve and a second electrically controlled valve electrically connected to the controller, wherein the first electrically controlled valve is arranged on the first circulation branch, and the second electrically controlled valve is arranged on the second circulation branch and between the engine and the radiator.

3. The vehicle heating system according to claim 1, characterized in that: The electrically controlled valve includes a three-way valve, a first interface of the three-way valve is connected to the liquid outlet, a second interface of the three-way valve is connected to the first circulation branch, and a third interface of the three-way valve is connected to the second circulation branch. The three-way valve can connect the second interface and / or the third interface with the first interface.

4. The vehicle heating system according to claim 1, characterized in that: The heat dissipation device further comprises a fan, which is arranged at one side of the heat sink and is used to drive air flow through the heat sink.

5. The vehicle heating system according to claim 1, characterized in that: The control device further comprises a rotation speed sensor, which is arranged on the engine crankshaft and electrically connected to the controller, and is used to detect the rotation speed of the engine crankshaft.

6. The vehicle heating system according to any one of claims 1 to 5, characterized in that: The vehicle heating system also includes a heating device and a delivery pipeline. The liquid outlet is connected to the heating device through the delivery pipeline. The heating device has an air inlet and an air outlet. The air inlet is arranged opposite to the radiator, and the air outlet is arranged in the driving room of the vehicle.

7. The vehicle heating system according to any one of claims 1 to 5, characterized in that: The vehicle heating system further includes a main pipe, a liquid inlet end of the main pipe is connected to the liquid outlet, and a liquid outlet end of the main pipe is connected to the first circulation branch and the second circulation branch respectively.

8. The vehicle heating system according to claim 7, characterized in that: The main pipe is provided with a pump source, and the outlet of the pump source is communicated with the liquid inlet.

9. The vehicle heating system according to any one of claims 1 to 5, characterized in that: The vehicle heating system further includes a temperature sensor, which is disposed at the liquid outlet and is used to detect the temperature of the medium flowing out of the engine.

10. A vehicle, characterized in that: The invention comprises a vehicle body and a vehicle heating system according to any one of claims 1 to 9, wherein the vehicle heating system is arranged on the vehicle body.

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