Automobile seat heating system and control method thereof

Abstract

The invention relates to an automobile seat heating system and a control method thereof. A plurality of seat heating pipelines are connected in parallel with a first proportional three-way valve and a second proportional three-way valve of a PTC heating pipeline in a vehicle warm air loop through a seat water pump and a liquid return pipe; according to the seat heating requirement, the warm air heating requirement and the seat temperature, the control device conveys the vehicle warm air system cooling liquid heated with the PTC as the heat source into the seat for heating, short circuit and radiation danger caused by electrification of the electric heating wire are avoided, energy consumption is reduced, and meanwhile normal functions of the warm air system are not affected. Furthermore, each seat heating pipeline corresponds to one seat and is arranged between the corresponding seat sponge and the corresponding seat coating, so that the heat of the heated cooling liquid can be more effectively utilized, and the heat is prevented from being dissipated into the internal space of the seat.

Description

Technical Field

[0001] The present application relates to the technical field of seat heating, and in particular to a vehicle seat heating system and a control method thereof. Background Art

[0002] With the rapid development of the automotive industry, people's demand for car comfort is constantly increasing. Car seat heating is also becoming more and more widely used, especially in cold northern regions. Seat heating can provide passengers with warm temperature faster and more comfortably than warm air conditioning.

[0003] The current mainstream seat heating system in the market heats the seat by energizing the electric heating wire inside the seat, thereby transferring heat to the occupants. However, there are the following problems: If liquid accidentally flows onto the seat during seat heating, the electric heating wire is likely to short-circuit and leak electricity; the electric heating wire will generate radiation when energized, which can cause physical harm, especially to pregnant women, children and other special groups; secondly, the electric heating wire used in the seat has high power consumption, which affects the economy of the entire vehicle to a certain extent.

[0004] Based on this, there is a need to propose a car seat heating system and a control method thereof to solve the above problems and meet the needs of drivers and passengers. Summary of the Invention

[0005] The embodiment of the present application provides a car seat heating system and a control method thereof to solve the problems of short circuit leakage, radiation hazard, and high power consumption in the related art of heating seats with electric heating wires.

[0006] In a first aspect, a vehicle seat heating system is provided, comprising: The PTC heating pipe is part of the vehicle's heating circuit and is equipped with a first proportional three-way valve and a second proportional three-way valve at its inlet and outlet, respectively; the second proportional three-way valve is connected to the seat water pump, and the first proportional three-way valve is connected to the return pipe; Multiple seat heating pipes connected in parallel to the vehicle's heating circuit via a seat water pump and a return pipe; each seat heating pipe corresponds to a seat and is arranged between the corresponding seat sponge and seat covering; A control device is used to obtain seat heating requirements, warm air heating requirements and seat temperature, and control the PTC heating pipeline, the first proportional three-way valve, the second proportional three-way valve, the seat heating pipeline and the seat water pump.

[0007] In some embodiments, the vehicle seat heating system further includes a redundant coolant line; The coolant redundant pipeline includes a redundant pipe, which is provided with a one-way valve; both ends of the redundant pipe are connected to the outlet of the seat water pump and the inlet of the return pipe respectively; The control device is used to control the opening and closing of the one-way valve according to different seat heating requirements.

[0008] In some embodiments, the seat heating circuit includes a temperature sensor, a solenoid valve, and a heating pipe for passing coolant therein; In the flow direction of the coolant in the heating pipe, the solenoid valve is located upstream and is installed on the heating pipe and connected to the outlet of the seat water pump; the temperature sensor is arranged outside the heating pipe to detect the temperature of the seat covering.

[0009] In some embodiments, the PTC heating circuit includes a PTC heating element and a coolant temperature sensor connected in sequence; The first interface of the first proportional three-way valve is connected to the liquid inlet pipe of the PTC heating element, the second interface is connected to the heater water pump of the vehicle heater circuit, and the third interface is connected to the liquid return pipe; The first interface of the second proportional three-way valve is connected to the liquid inlet of the seat water pump, the second interface is connected to the heater core of the vehicle heater circuit, and the third interface is connected to the liquid outlet pipe of the PTC heating element.

[0010] In some embodiments, the control device includes a seat controller and a power threshold controller connected via a signal line; The seat controller is used to obtain heating on and off signals for different seats, as well as real-time seat temperatures of different seats; the heating on and off signals for different seats are seat heating requirements; The power threshold controller is used to control the opening and closing of the corresponding interfaces of the first proportional three-way valve and the second proportional three-way valve, as well as the operation of the seat water pump and the solenoid valve according to the seat heating demand, the warm air heating demand and the seat temperature.

[0011] In some embodiments, the outer surface of the seat sponge is provided with a first groove for accommodating a heating pipe of a seat heating system, and the extension trajectory of the first groove is the same as the distribution trajectory of the heating pipe; the inner surface of the seat cover is provided with a second groove for accommodating the heating pipe of the seat heating system, and the extension trajectory of the second groove is the same as the extension trajectory of the first groove; the first groove and the second groove form a limiting space for the heating pipe; The outer surface of the seat sponge having the first groove is provided with a heat insulation layer.

[0012] In some embodiments, the heating pipe of the seat heating circuit corresponding to each seat includes a first section and a second section, the first section and the second section being connected by a detachable sealing joint; the first section and the second section are both provided with a snap-on pipe clamp for connecting to the vehicle body; The snap-on pipe clamp includes a vehicle body fixed connection seat, a semicircular fixed buckle is provided on the top of the vehicle body fixed connection seat, one side of the semicircular fixed buckle is connected to a semicircular movable buckle through a flexible connection part; the side of the semicircular movable buckle away from the flexible connection part is snapped with the semicircular fixed buckle.

[0013] In a second aspect, a method for controlling a vehicle seat heating system is provided, comprising the following steps: Using a control device to obtain seat heating demand, warm air heating demand and seat temperature; Determine the control mode based on the seat heating demand and the warm air heating demand; According to the control mode, the PTC heating pipeline is controlled to heat the coolant, and then the opening and closing of the corresponding interfaces of the first proportional three-way valve and the second proportional three-way valve, as well as the opening and closing of the seat water pump are controlled; then, according to the seat temperature corresponding to different seats, the opening and closing of the corresponding seat heating pipeline and the opening and closing of the seat water pump are controlled.

[0014] In some embodiments, the seat heating circuit includes a temperature sensor, a solenoid valve, and a heating pipe for passing coolant. The solenoid valve is located upstream of the coolant flow in the heating pipe and is mounted on the heating pipe and connected to the outlet of the seat water pump. The temperature sensor is disposed outside the heating pipe to detect the temperature of the seat covering. Controlling the opening and closing of the corresponding seat heating pipes and the seat water pump according to the seat temperature corresponding to different seats includes the following steps: Using the control device to obtain the real-time seat temperature of different seats; Compare the real-time seat temperature of each seat with its corresponding set heating temperature; If the real-time seat temperature of some seats exceeds the set heating temperature, the solenoid valves corresponding to the seats whose seat temperatures exceed the set heating temperature will be closed, and the seat water pump will remain on; If the real-time seat temperature of all seats exceeds the set heating temperature, the solenoid valves corresponding to all seats will be closed, and the seat water pump will be controlled to be turned off; If the real-time seat temperature of all seats does not exceed the set heating temperature, the solenoid valves corresponding to all seats will open to keep the seat water pump on.

[0015] In some embodiments, the vehicle seat heating system further includes a redundant coolant line; The coolant redundant pipeline includes a redundant pipe, which is provided with a one-way valve; both ends of the redundant pipe are connected to the outlet of the seat water pump and the inlet of the return pipe respectively; The control method of the automobile seat heating system further includes the following steps: When the real-time seat temperature of some seats exceeds the set heating temperature and the corresponding solenoid valve is closed, the seat water pump is kept on and the one-way valve is controlled to open; When the real-time seat temperature of all seats exceeds the set heating temperature and the solenoid valves corresponding to all seats are closed, the seat water pump is turned off and the one-way valve is controlled to open; When the real-time seat temperatures of all seats do not exceed the set heating temperature, the solenoid valve is controlled to open, the seat water pump is kept turned on, and the one-way valve is closed.

[0016] The beneficial effects of the technical solution provided by this application include: An embodiment of the present application provides a car seat heating system and a control method thereof. Since multiple seat heating pipes are connected in parallel with the first proportional three-way valve and the second proportional three-way valve of the PTC heating pipe in the vehicle warm air circuit through a seat water pump and a return pipe, the control device will transport the vehicle warm air system coolant heated by PTC as a heat source to the seat for heating according to the seat heating demand, warm air heating demand and seat temperature, thereby avoiding the short circuit and radiation hazards of the electric heating wire, and reducing energy consumption while not affecting the normal function of the warm air system. Furthermore, each seat heating pipe corresponds to a seat and is arranged between the corresponding seat sponge and seat covering. This type of arrangement can more effectively utilize the heat of the heated coolant and avoid heat dissipation into the interior space of the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 The first form of the car seat heating system provided in the embodiment of the present application; Figure 2 The second form of the car seat heating system provided in the embodiment of the present application; Figure 3 A flow chart of a method for controlling the heating of the driver's seat provided in an embodiment of the present application; Figure 4 A schematic diagram of the structure of a control device provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of the seat sponge and seat covering provided in an embodiment of the present application; Figure 6 A schematic structural diagram of a seat cover provided in an embodiment of the present application; Figure 7A schematic diagram of the structure of the seat sponge provided in an embodiment of the present application; Figure 8 This is a schematic structural diagram of the snap-on pipe clamp provided in an embodiment of the present application.

[0019] In the figure: 1. PTC heating pipeline; 2. First proportional three-way valve; 3. Second proportional three-way valve; 4. Seat water pump; 5. Return pipe; 6. Redundant coolant pipeline; 600. One-way valve; 7. Snap-on pipe clamp; 700. Body fixed connection seat; 701. Semicircular fixing buckle; 702. Semicircular movable buckle; 8. Seat heating pipeline. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0021] The current mainstream seat heating system in the market heats the seat by energizing the electric heating wire inside the seat, thereby transferring heat to the occupants. However, there are the following problems: If liquid accidentally flows onto the seat during seat heating, the electric heating wire is likely to short-circuit and leak electricity; the electric heating wire will generate radiation when energized, which can cause physical harm, especially to pregnant women, children and other special groups; secondly, the electric heating wire used in the seat has high power consumption, which affects the economy of the entire vehicle to a certain extent.

[0022] Based on this, it is currently necessary to propose a car seat heating system and its control method to solve the above problems and meet the needs of drivers and passengers. While meeting the warm air heating requirements of the warm air system, it is also necessary to measure the energy consumption of seat heating, that is, how to control when the warm air heating requirements and seat heating requirements exist at the same time or only one requirement exists; and make full use of the heated coolant to heat the seat. In addition, the heating requirements of different seats in the vehicle are not only different, but also require reasonable and refined control. The following is a detailed explanation: First, in response to the basic problem, the embodiment of the present application provides a car seat heating system and a control method thereof to solve the problems of short circuit leakage, radiation hazard, and high power consumption in the related art of heating seats with electric heating wires.

[0023] See Figure 1 , a car seat heating system, comprising: A PTC heating pipe 1 is part of the vehicle's heating circuit, and is provided with a first proportional three-way valve 2 and a second proportional three-way valve 3 at its inlet and outlet, respectively. The second proportional three-way valve 3 is connected to a seat water pump 4, and the first proportional three-way valve 2 is connected to a liquid return pipe 5. Multiple seat heating pipes 8, which are connected in parallel to the vehicle heating circuit through the seat water pump 4 and the return pipe 5; each seat heating pipe 8 corresponds to a seat and is arranged between the corresponding seat sponge and seat covering; The control device is used to obtain the seat heating demand, warm air heating demand and seat temperature, and control the PTC heating pipeline 1, the first proportional three-way valve 2, the second proportional three-way valve 3, the seat heating pipeline 8 and the seat water pump 4.

[0024] Through the above arrangement, first, multiple seat heating pipes 8 are connected in parallel with the first proportional three-way valve 2 and the second proportional three-way valve 3 of the PTC heating pipe 1 in the vehicle's heating circuit via the seat water pump 4 and the return pipe 5. This allows the vehicle's heating system coolant, heated by the PTC as a heat source, to be delivered to the seats for heating, thus avoiding the risk of short circuits and radiation from the electric heating wires. Secondly, each seat heating pipe 8 corresponds to a seat, and each seat heating pipe 8 corresponds to a seat and is arranged between the corresponding seat sponge and the seat covering. This kind of arrangement can more effectively utilize the heat of the heated coolant, avoid the heat from heating the internal space of the seat, and reduce the ineffective loss and waste of heat.

[0025] Third, the control device is used to obtain the seat heating demand, warm air heating demand and seat temperature, and control the PTC heating pipeline 1, the first proportional three-way valve 2, the second proportional three-way valve 3, the seat heating pipeline 8 and the seat water pump 4, so that corresponding control can be performed when the warm air heating demand and the seat heating demand exist at the same time or when only one demand exists, and reasonable and refined control can be performed to control energy consumption. The control method will be introduced later.

[0026] In some preferred embodiments, when one seat does not require heating while the other seats do, the flow rate is relatively low compared to the power required to operate the seat water pump 4 for heating all seats. However, in reality, the seat water pump 4 does not make any control changes. This results in a water pressure difference between the seat heating pipeline 8 and the warm air pipeline, resulting in excessive coolant in multiple seat heating pipelines 8. Therefore, in order to fully utilize the coolant, the following settings are made: refer to Figure 2 , the car seat heating system also includes a coolant redundant pipeline 6; The coolant redundant pipeline 6 includes a redundant pipe, on which a one-way valve 600 is provided; both ends of the redundant pipe are connected to the outlet of the seat water pump 4 and the inlet of the return pipe 5 respectively; The control device is used to control the opening and closing of the one-way valve 600 according to different seat heating requirements, thereby timely releasing excess coolant in multiple seat heating pipelines 8 to achieve full utilization.

[0027] In some preferred embodiments, the specific form of the seat heating pipeline 8 is described as follows: refer to Figure 2 The seat heating pipe 8 includes a temperature sensor, a solenoid valve, and a heating pipe for passing coolant. The temperature sensors of the three seat heating pipes 8 are marked as T1, T2, and T3 respectively. The solenoid valve is located upstream of the coolant flow in the heating pipe and is connected to the outlet of the seat water pump 4. A temperature sensor is located outside the heating pipe to monitor the temperature of the seat upholstery. This temperature sensor is a wire-type sensor, making it easy to embed in the seat upholstery.

[0028] refer to Figure 5-Figure 7 The outer surface of the seat sponge is provided with a first groove for accommodating the heating pipe of the seat heating pipe 8. The first groove is marked E, the heating pipe is marked D, the seat sponge is marked C, and the seat covering is marked B; the extension trajectory of the first groove is the same as the distribution trajectory of the heating pipe; the inner surface of the seat covering is provided with a second groove for accommodating the heating pipe of the seat heating pipe 8, and the extension trajectory of the second groove is the same as the extension trajectory of the first groove; the first groove and the second groove form a limiting space for the heating pipe; the limiting space for the heating pipe ensures that the position of the heating pipe will not change when riding.

[0029] The outer surface of the seat sponge having the first groove is provided with a heat insulation layer to prevent heat from being lost downwards.

[0030] Through the above settings, the distribution trajectory of the heating pipe can be serpentine, so as to maximize the laying area of the heating pipe and ensure the heating performance; the seat covering is made of wear-resistant and heat-conductive materials to ensure the performance requirements of seat heating and riding comfort.

[0031] In some preferred embodiments, the PTC heating circuit 1 includes a PTC heating element and a coolant temperature sensor T connected in sequence; The first interface of the first proportional three-way valve 2 is connected to the liquid inlet pipe of the PTC heating element, the second interface is connected to the heater water pump of the vehicle heater circuit, and the third interface is connected to the liquid return pipe 5; The first port of the second proportional three-way valve 3 is connected to the liquid inlet of the seat water pump 4, the second port is connected to the heater core of the vehicle's heating circuit, and the third port is connected to the liquid outlet pipe of the PTC heating element. The vehicle's heating circuit includes a heater core connected to the second port of the second proportional three-way valve 3 and its outlet; a heater water pump connected to the outlet of the heater water pump, which is connected to the second port of the first proportional three-way valve 2; and a water tank connected in parallel with the heater water pump. The heater water pump provides circulation power for the heating system's piping; the water tank replenishes coolant and relieves pressure and air throughout the piping. The heater core serves as the heating system's evaporator.

[0032] The above fully introduces the specific connection relationship between the first proportional three-way valve 2 and the second proportional three-way valve 3 and the PTC heating pipeline 1, the seat heating pipeline 8, and the vehicle heating circuit.

[0033] Further, the control device is introduced and explained. Figure 4 : The control device includes a seat controller and a power threshold controller connected by a signal line; The seat controller is used to obtain the heating on and off signals of different seats, as well as the real-time seat temperature of different seats; the heating on and off signals of different seats represent the seat heating requirements; The power threshold controller is used to control the opening and closing of the corresponding interfaces of the first proportional three-way valve 2 and the second proportional three-way valve 3, as well as the operation of the seat water pump 4 and the solenoid valve according to the seat heating demand, warm air heating demand and seat temperature.

[0034] Through the above settings, the specific control process is: The control device is used to obtain seat heating requirements, warm air heating requirements and seat temperature; the seat heating requirements are obtained by the state of the heating switch corresponding to each seat; Determine the control mode based on the seat heating demand and the warm air heating demand; The control mode is seat heating and the heater and air conditioner are not working: When seat heating is required, the seat controller detects the actual seat temperature through the seat temperature sensor, sends a signal to the PDCU (power domain controller) via CAN, and the PDCU sends the execution command to the execution device, turning on the PTC heating, the seat water pump 4, and the solenoid valve. At this time, the first and third interfaces of the first proportional three-way valve 2 are connected, and the first and second interfaces are closed. The first and third interfaces of the second proportional three-way valve 3 are connected, and the first and second interfaces are closed. The control mode is for seat heating, and the warm air conditioning also works: PTC heating is turned on, the seat water pump 4 is turned on, and the solenoid valve is turned on. At this time, the first interface and the third interface of the first proportional three-way valve 2 are connected, and the first interface and the second interface are connected. The first interface and the third interface of the second proportional three-way valve 3 are connected, and the first interface and the second interface are connected.

[0035] In some preferred embodiments, the heating pipe of the seat heating circuit 8 corresponding to each seat includes a first section and a second section, which are connected by a detachable sealing joint; the first section and the second section are both provided with a snap-on pipe clamp 7 for connecting to the vehicle body; refer to Figure 8 As shown, the snap-on pipe clamp 7 includes a vehicle body fixed connection seat 700, a semicircular fixing buckle 701 is provided on the top of the vehicle body fixed connection seat 700, and one side of the semicircular fixing buckle 701 is connected to a semicircular movable buckle 702 through a flexible connection part; the side of the semicircular movable buckle 702 away from the flexible connection part is snapped with the semicircular fixing buckle 701.

[0036] The above arrangement facilitates the installation of the heating pipe, that is, the segmented connection facilitates connection, and the snap-on pipe clamp 7 facilitates fixation to the vehicle body.

[0037] This application also proposes a control method for a car seat heating system, which includes the following steps: Step 100: Obtain seat heating requirements, warm air heating requirements, and seat temperature using a control device; Step 200: Determine a control mode based on seat heating requirements and warm air heating requirements; Step 300: Control the PTC heating pipeline 1 to heat the coolant according to the control mode, and then control the opening and closing of the corresponding interfaces of the first proportional three-way valve 2 and the second proportional three-way valve 3, as well as the opening and closing of the seat water pump 4; then control the opening and closing of the corresponding seat heating pipeline 8 and the opening and closing of the seat water pump 4 according to the seat temperature corresponding to different seats.

[0038] The control mode is seat heating and the heater and air conditioner are not working: When seat heating is required, the seat controller detects the actual seat temperature through the seat temperature sensor, sends a signal to the PDCU via CAN, and the PDCU sends the execution command to the execution device, turning on the PTC heating, the seat water pump 4, and the solenoid valve. At this time, the first and third interfaces of the first proportional three-way valve 2 are connected, and the first and second interfaces are closed. The first and third interfaces of the second proportional three-way valve 3 are connected, and the first and second interfaces are closed. The control mode is for seat heating, and the warm air conditioning also works: PTC heating is turned on, the seat water pump 4 is turned on, and the solenoid valve is turned on. At this time, the first interface and the third interface of the first proportional three-way valve 2 are connected, and the first interface and the second interface are connected. The first interface and the third interface of the second proportional three-way valve 3 are connected, and the first interface and the second interface are connected.

[0039] The control mode is that the seat heating does not work, and the heating and air conditioning works: PTC heating is turned on, the seat water pump 4 is not turned on, and the solenoid valve is not turned on. At this time, the first interface and the third interface of the first proportional three-way valve 2 are closed, and the first interface and the second interface are connected. The first interface and the third interface of the second proportional three-way valve 3 are closed, and the first interface and the second interface are connected.

[0040] refer to Figure 2 and Figure 3 , take the driver's seat as an example: The driver's seat heating button outputs a seat heating request tt1≤t≤t2. The seat controller then extracts the actual seat temperature treal. If treal < t1, it activates seat water pump 4, the PTC, and solenoid valve a. The first and third ports of first proportional three-way valve 2 are connected, and the first and third ports of second proportional three-way valve 3 are connected. If treal > t2, the PTC and seat water pump 4 stop, and the actual seat temperature Treal continues to be monitored. If treal < t1, the PTC is activated again, ensuring t1 ≤ treal ≤ t2. The solenoid valves for the passenger seat and rear seats are labeled b and c, respectively.

[0041] In some preferred embodiments, since there are multiple seats in the vehicle, there are multiple seat heating pipes 8. In order to achieve refined control of multiple seats and meet actual needs, the following settings are provided: The seat heating circuit 8 includes a temperature sensor, a solenoid valve, and a heating pipe for coolant flow. The solenoid valve is located upstream of the coolant flow in the heating pipe and is mounted on the heating pipe and connected to the outlet of the seat water pump 4. The temperature sensor is located outside the heating pipe to detect the temperature of the seat covering. Controlling the opening and closing of the corresponding seat heating pipe 8 and the opening and closing of the seat water pump 4 according to the seat temperature corresponding to different seats specifically includes the following steps: Using the control device to obtain the real-time seat temperature of different seats; Compare the real-time seat temperature of each seat with its corresponding set heating temperature; If the real-time seat temperature of some seats exceeds the set heating temperature, the solenoid valves corresponding to the seats whose seat temperatures exceed the set heating temperature are closed, and the seat water pump 4 is kept open; If the real-time seat temperature of all seats exceeds the set heating temperature, the solenoid valves corresponding to all seats are closed, and the seat water pump 4 is controlled to be closed; If the real-time seat temperatures of all seats do not exceed the set heating temperature, the solenoid valves corresponding to all seats are opened to keep the seat water pump 4 turned on.

[0042] By setting the above steps, the heating of each seat can be turned off individually to achieve differentiated control.

[0043] Furthermore, in order to fully utilize the coolant, the following settings are made: The car seat heating system also includes a coolant redundant line 6; The coolant redundant pipeline 6 includes a redundant pipe, on which a one-way valve 600 is provided; both ends of the redundant pipe are connected to the outlet of the seat water pump 4 and the inlet of the return pipe 5 respectively; The control method of the automobile seat heating system further includes the following steps: When the real-time seat temperature of some seats exceeds the set heating temperature, the corresponding solenoid valve is closed, the seat water pump 4 is kept open, and the one-way valve 600 is controlled to open; When the real-time seat temperatures of all seats exceed the set heating temperature and the solenoid valves corresponding to all seats are closed, the seat water pump 4 is turned off and the one-way valve 600 is controlled to open; When the real-time seat temperatures of all seats do not exceed the set heating temperature, the control solenoid valve is opened, the seat water pump 4 is turned on, and the one-way valve 600 is closed.

[0044] The above method realizes that in order to fully utilize the coolant, the one-way valve 600 is controlled to open according to different situations to reduce the pressure difference.

[0045] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0046] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0047] The above are merely specific embodiments of the present application to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather is intended to conform to the widest scope consistent with the principles and novel features of the present application.

Claims

1. A car seat heating system, characterized in that: It includes: A PTC heating pipeline (1) is part of a vehicle heating circuit, and a first proportional three-way valve (2) and a second proportional three-way valve (3) are provided at the inlet and outlet, respectively; the second proportional three-way valve (3) is connected to a seat water pump (4), and the first proportional three-way valve (2) is connected to a liquid return pipe (5); A plurality of seat heating pipes (8) are connected in parallel to the vehicle heating circuit via a seat water pump (4) and a return pipe (5); each seat heating pipe (8) corresponds to a seat and is arranged between the corresponding seat sponge and seat covering; A control device is used to obtain a seat heating demand, a warm air heating demand and a seat temperature, and to control the PTC heating pipeline (1), the first proportional three-way valve (2), the second proportional three-way valve (3), the seat heating pipeline (8) and the seat water pump (4).

2. The car seat heating system according to claim 1, wherein: The car seat heating system also includes a coolant redundant line (6); The coolant redundant pipeline (6) includes a redundant pipe, on which a one-way valve (600) is provided; both ends of the redundant pipe are respectively connected to the outlet of the seat water pump (4) and the inlet of the return liquid pipe (5); The control device is used to control the opening and closing of the one-way valve (600) according to different seat heating requirements.

3. The car seat heating system according to claim 1, wherein: The seat heating pipeline (8) includes a temperature sensor, a solenoid valve and a heating pipe for passing coolant inside; In the flow direction of the coolant in the heating pipe, the solenoid valve is located upstream and is installed on the heating pipe and connected to the outlet of the seat water pump (4); the temperature sensor is arranged outside the heating pipe to detect the temperature of the seat covering.

4. The car seat heating system according to claim 3, wherein: The PTC heating pipeline (1) comprises a PTC heating element and a coolant temperature sensor connected in sequence; The first interface of the first proportional three-way valve (2) is connected to the liquid inlet pipe of the PTC heating element, the second interface is connected to the warm air water pump of the vehicle warm air circuit, and the third interface is connected to the liquid return pipe (5); The first interface of the second proportional three-way valve (3) is connected to the liquid inlet of the seat water pump (4), the second interface is connected to the heater core of the vehicle heater circuit, and the third interface is connected to the liquid outlet pipe of the PTC heating element.

5. The car seat heating system according to claim 4, characterized in that: The control device includes a seat controller and a power threshold controller connected by a signal line; The seat controller is used to obtain heating on and off signals for different seats, as well as real-time seat temperatures of different seats; the heating on and off signals for different seats are seat heating requirements; The power threshold controller is used to control the opening and closing of the corresponding interfaces of the first proportional three-way valve (2) and the second proportional three-way valve (3), as well as the operation of the seat water pump (4) and the solenoid valve according to the seat heating demand, the warm air heating demand and the seat temperature.

6. The car seat heating system according to claim 3, wherein: The outer surface of the seat sponge is provided with a first groove for accommodating the heating pipe of the seat heating pipe (8), and the extension trajectory of the first groove is the same as the distribution trajectory of the heating pipe; the inner surface of the seat covering is provided with a second groove for accommodating the heating pipe of the seat heating pipe (8), and the extension trajectory of the second groove is the same as the extension trajectory of the first groove; the first groove and the second groove form a limiting space for the heating pipe; The outer surface of the seat sponge having the first groove is provided with a heat insulation layer.

7. The car seat heating system according to claim 3, wherein: The heating pipe of the seat heating pipe (8) corresponding to each seat includes a first section and a second section, and the first section and the second section are connected by a detachable sealing joint; the first section and the second section are both provided with a snap-on pipe clamp (7) for connecting to the vehicle body; The snap-on pipe clamp (7) comprises a vehicle body fixed connection seat (700), a semicircular fixed buckle (701) being provided on the top of the vehicle body fixed connection seat (700), one side of the semicircular fixed buckle (701) being connected to a semicircular movable buckle (702) via a flexible connection portion; and a side of the semicircular movable buckle (702) away from the flexible connection portion is snap-connected to the semicircular fixed buckle (701).

8. A control method for a car seat heating system according to claim 1, characterized in that: It includes the following steps: Using a control device to obtain seat heating demand, warm air heating demand and seat temperature; Determine the control mode based on the seat heating demand and the warm air heating demand; According to the control mode, the PTC heating pipeline (1) is controlled to heat the coolant, and then the opening and closing of the corresponding interfaces of the first proportional three-way valve (2) and the second proportional three-way valve (3) and the opening and closing of the seat water pump (4) are controlled; and then the opening and closing of the corresponding seat heating pipeline (8) and the opening and closing of the seat water pump (4) are controlled according to the seat temperature corresponding to different seats.

9. The control method of the automobile seat heating system according to claim 8, characterized in that: The seat heating pipeline (8) includes a temperature sensor, a solenoid valve, and a heating pipe for passing coolant inside; in the flow direction of the coolant in the heating pipe, the solenoid valve is located upstream and is installed on the heating pipe and connected to the outlet of the seat water pump (4); the temperature sensor is arranged outside the heating pipe to detect the temperature of the seat covering; Controlling the opening and closing of the corresponding seat heating pipeline (8) and the opening and closing of the seat water pump (4) according to the seat temperature corresponding to different seats specifically includes the following steps: Using the control device to obtain the real-time seat temperature of different seats; Compare the real-time seat temperature of each seat with its corresponding set heating temperature; If the real-time seat temperature of some seats exceeds the set heating temperature, the solenoid valves corresponding to the seats whose seat temperatures exceed the set heating temperature are closed, and the seat water pump (4) is kept open; If the real-time seat temperature of all seats exceeds the set heating temperature, the solenoid valves corresponding to all seats are closed, and the seat water pump (4) is controlled to be closed; If the real-time seat temperatures of all seats do not exceed the set heating temperature, the solenoid valves corresponding to all seats are opened, and the seat water pump (4) is kept open.

10. The control method of the automobile seat heating system according to claim 9, characterized in that: The car seat heating system also includes a coolant redundant line (6); The coolant redundant pipeline (6) includes a redundant pipe, on which a one-way valve (600) is provided; both ends of the redundant pipe are respectively connected to the outlet of the seat water pump (4) and the inlet of the return liquid pipe (5); The control method of the automobile seat heating system further includes the following steps: When the real-time seat temperature of some seats exceeds the set heating temperature, the corresponding solenoid valve is closed, the seat water pump (4) is kept open, and the one-way valve (600) is controlled to open; When the real-time seat temperatures of all seats exceed the set heating temperature and the solenoid valves corresponding to all seats are closed, the seat water pump (4) is closed and the one-way valve (600) is controlled to open; When the real-time seat temperatures of all seats do not exceed the set heating temperature, the solenoid valve is controlled to open, the seat water pump (4) is kept open, and the one-way valve (600) is closed.

Images