A car seat temperature regulation control system and method

Abstract

This invention belongs to the field of automotive seat temperature control technology, specifically providing an automotive seat temperature adjustment control system and method. The system includes a driver's seat core, a passenger seat core, and a rear seat core connected in parallel, with one end connected to a refrigeration mechanism via an electronic water pump, and the other end connected to a heating mechanism via a second flow control valve. The refrigeration mechanism is connected to the heating mechanism. The system also includes a thermal management controller and connected to it, along with driver's seat temperature sensors, passenger seat temperature sensors, rear seat temperature sensors, an ambient temperature sensor, a light intensity sensor, an interior temperature sensor, a central control screen, an engine EMS, and a pressure and temperature sensor for the refrigeration mechanism. The refrigeration and heating mechanisms are respectively connected to the thermal management controller, which controls the operation of either the refrigeration or heating mechanism based on information collected by the connected sensors. This maintains the seat temperature within a target range, improving passenger comfort.

Description

Technical Field

[0001] This invention relates to the field of automotive seat temperature control technology, specifically to an automotive seat temperature regulation and control system and method. Background Technology

[0002] With the development of society and the economy, transportation options have become increasingly diverse, among which automobiles are the most popular and widespread. There are numerous car brands, and as people's living standards continue to improve, the public's demands for car comfort are increasing. While the overall structure of cars is relatively similar, the largest component inside is the seat, where the driver or passengers sit. Roughly speaking, seats can be divided into: front seats (headrest, backrest, seat cushion) and rear seats (headrest, backrest, seat cushion, side bolsters). As the surface temperature of the seat directly affects the comfort of the occupants, the seat is the point of direct contact between them and the vehicle.

[0003] Currently, most mainstream car models on the market cool their seats primarily through seat ventilation. This method doesn't actively lower the seat temperature; instead, it cools the seat by creating convection currents through airflow. This results in uncontrollable seat temperature, slow cooling, and a less noticeable cooling effect. Furthermore, the airflow blowing directly on the body can negatively impact passenger comfort. Seat heating, on the other hand, primarily uses built-in heating resistors, which pose a risk of electrical leakage and fire.

[0004] This is a shortcoming of the existing technology. Therefore, in view of the above-mentioned defects in the existing technology, it is necessary to develop a safe seat temperature regulation system that can actively regulate the seat surface temperature. Summary of the Invention

[0005] In most mainstream car models on the market, seat cooling is primarily achieved through seat ventilation. This method cannot actively lower the seat temperature; instead, it cools the seat by creating convection currents through airflow. This results in uncontrollable seat temperature, slow cooling speed, and insignificant cooling effect. Furthermore, the airflow blowing directly on the body affects passenger comfort. Seat heating mainly relies on built-in heating resistors, which pose a risk of electrical leakage and fire. This invention provides a car seat temperature regulation control system and method.

[0006] In a first aspect, the present invention provides an automotive seat temperature regulation and control system, including a refrigeration mechanism, a heating mechanism, a driver's seat core, a passenger seat core, and a rear seat core;

[0007] The driver's seat core, passenger seat core and rear seat core are connected in parallel, with one end connected to the refrigeration mechanism via an electronic water pump and the other end connected to the heating mechanism via a second flow control valve;

[0008] The refrigeration mechanism is connected to the heating mechanism;

[0009] The system also includes a thermal management controller and connected to the thermal management controller a driver's seat temperature sensor, a passenger seat temperature sensor, a rear seat temperature sensor, an ambient temperature sensor, a light intensity sensor, an interior temperature sensor, a central control screen, an engine EMS, and a refrigeration mechanism pressure and temperature sensor.

[0010] The refrigeration and heating mechanisms are respectively connected to the thermal management controller, which controls the operation of the refrigeration or heating mechanism based on the information collected by the connected sensors.

[0011] As a preferred embodiment of the present invention, the refrigeration mechanism includes a seat refrigeration heat exchanger. The refrigerant-side inlet end of the seat refrigeration heat exchanger is connected to the outlet end of a second electronic expansion valve. The refrigerant-side outlet end of the seat refrigeration heat exchanger is connected to the inlet end of a variable displacement compressor. The inlet end of the second electronic expansion valve is connected to the outlet end of a liquid receiver dryer. The outlet end of the liquid receiver dryer is also connected to the inlet end of a passenger compartment evaporator via a first electronic expansion valve. The outlet end of the passenger compartment evaporator is connected to the inlet end of a variable displacement compressor. The outlet end of the variable displacement compressor is connected to the inlet end of a condenser. The outlet end of the condenser is connected to the inlet end of a liquid receiver dryer.

[0012] The coolant-side inlet of the seat cooling heat exchanger is connected to the outlet of the electronic water pump, and the coolant-side outlet of the seat cooling heat exchanger is connected to the inlet of the heating mechanism.

[0013] As a preferred embodiment of the present invention, the heating mechanism includes a seat heating heat exchanger. The inlet end of the seat heating heat exchanger on the heat source side is connected to the outlet end of a first flow control valve. The outlet end of the seat heating heat exchanger on the heat source side is connected to an engine heater return port. The outlet end of the first flow control valve is connected to the engine heater return port through the passenger compartment heater core. The outlet end of the seat heating heat exchanger on the seat temperature regulation circuit side is connected to the inlet end of a second flow control valve. The outlet end of the second flow control valve is connected to the inlet ends of the driver's seat core, the passenger seat core, and the rear seat core, respectively. The outlet end of the seat cooling heat exchanger on the coolant side is connected to the inlet end of the seat heating circuit side of the seat heating heat exchanger.

[0014] As a preferred embodiment of the technical solution of the present invention, the variable displacement compressor is mounted on a bracket attached to the engine block and is used to compress the low-temperature, low-pressure gaseous refrigerant entering the variable displacement compressor into a high-temperature, high-pressure gaseous refrigerant and discharge it.

[0015] The condenser is located at the front of the engine compartment near the air intake grille, and is used to condense the high-temperature, high-pressure gaseous refrigerant discharged from the variable displacement compressor into a medium-temperature, high-pressure liquid refrigerant.

[0016] The liquid receiver dryer is located near or integrated on the condenser to store excess refrigerant in the air conditioning system, while also removing impurities and moisture from the refrigerant.

[0017] The first electronic expansion valve is installed on the passenger compartment cooling branch of the condenser outlet line in the engine compartment. It is used for pressure reduction and throttling. At the same time, it receives instructions from the thermal management controller to adjust the opening degree, thereby regulating the refrigerant flow in the passenger compartment cooling branch.

[0018] The second electronic expansion valve is installed on the seat cooling branch of the condenser outlet line in the engine compartment. It is used for pressure reduction and throttling. At the same time, it receives instructions from the thermal management controller to adjust the opening degree and realize the regulation of refrigerant flow in the seat cooling branch.

[0019] The crew compartment evaporator is located inside the crew compartment instrument panel and is used to evaporate the low-temperature, low-pressure liquid refrigerant after being throttled by the first electronic expansion valve into gaseous refrigerant.

[0020] The seat cooling heat exchanger is located in the engine compartment and is used to exchange heat between the coolant inside the seat cooling heat exchanger and the low-temperature refrigerant to achieve coolant cooling.

[0021] As a preferred embodiment of the technical solution of the present invention, the engine is mounted on the vehicle body or chassis frame via a suspension rubber block to provide a heat source for heating the passenger compartment and the seats.

[0022] The first flow control valve is installed in the heat source side circuit in the engine compartment and is used to receive instructions from the thermal management controller to adjust the coolant flow of each branch.

[0023] The passenger compartment heating core is located inside the passenger compartment instrument panel. It is used to heat the air by exchanging heat between the air flowing over the surface of the passenger compartment heating core and the high-temperature coolant flowing inside the passenger compartment heating core.

[0024] The seat heating heat exchanger is located in the engine compartment and is used to exchange heat between the coolant in the seat heating circuit inside the seat heating heat exchanger and the high-temperature coolant in the heat source side circuit, thereby raising the temperature of the coolant.

[0025] As a preferred embodiment of the technical solution of the present invention, the driver's seat core, the passenger seat core, and the rear seat core are respectively installed inside the corresponding seats, so as to exchange heat between the coolant in each core and the surrounding environment of each seat cushion, thereby increasing or decreasing the temperature of each seat cushion.

[0026] An electric water pump is installed in the seat temperature control circuit in the cabin to provide power for the circulation of coolant in the circuit. At the same time, it receives instructions from the thermal management controller to regulate the coolant flow rate in the circuit.

[0027] The second flow control valve is installed in the seat adjustment circuit in the engine compartment and is used to receive instructions from the thermal management controller to adjust the flow rate of coolant in each seat branch of the seat temperature adjustment circuit.

[0028] As a preferred embodiment of the technical solution of the present invention, the driver's seat temperature sensor, the passenger seat temperature sensor and the rear seat temperature sensor are respectively installed inside the corresponding seat cushions to collect the temperature of the corresponding seat cushions and input the information to the thermal management controller.

[0029] An ambient temperature sensor is installed on the front grille of the vehicle to collect ambient temperature information and input the information to the thermal management controller;

[0030] A light intensity sensor is installed on the upper part of the windshield to collect light intensity information and input the information to the thermal management controller;

[0031] The interior temperature sensor is located on the right side of the driver's side of the dashboard in the passenger compartment. It is used to collect interior temperature information and input the information to the thermal management controller.

[0032] The pressure and temperature sensors for the refrigeration system include the pressure and temperature sensor at the outlet of the evaporator in the passenger compartment and the pressure and temperature sensor at the outlet of the seat refrigeration heat exchanger.

[0033] The crew compartment evaporator outlet pressure and temperature sensor is installed at the outlet of the crew compartment evaporator pipe inside the cabin. It is used to collect the pressure and temperature of the refrigerant at the outlet of the crew compartment evaporator in the crew compartment cooling branch and input the information to the thermal management controller.

[0034] The seat cooling heat exchanger outlet pressure and temperature sensor is set at the refrigerant side outlet of the seat cooling heat exchanger to collect the pressure and temperature of the refrigerant at the refrigerant side outlet of the seat cooling heat exchanger and input it to the thermal management controller.

[0035] The central control screen is located in the middle of the instrument panel in the passenger compartment. It is used to collect information on the temperature adjustment of the passenger seats and input it to the heating management controller.

[0036] The engine EMS is located in the engine compartment and is used to collect engine speed and vehicle speed, and input the information to the thermal management controller.

[0037] Secondly, the present invention provides a method for regulating and controlling the temperature of a car seat, comprising the following steps:

[0038] When the seats need to be cooled, the variable displacement compressor and electric water pump are started, and the first flow control valve is controlled to shut off the flow on the heat source side of the seat heating heat exchanger. The displacement of the variable displacement compressor and the opening of the second electronic expansion valve are adjusted according to the seat cooling requirements. The coolant in the seat temperature regulation circuit is cooled in the seat cooling heat exchanger. The cooled coolant is distributed to the driver's seat core, passenger seat core and rear seat core through the second flow control valve to achieve seat cooling.

[0039] When the seat needs to be heated, the electronic water pump is activated. The opening of the first flow control valve is controlled according to the seat heating demand to adjust the flow rate on the heat source side of the seat heating heat exchanger. The coolant in the seat temperature regulation circuit is heated in the seat heating heat exchanger. The heated coolant is then distributed to the driver's seat core, passenger seat core and rear seat core through the second flow control valve to achieve seat heating.

[0040] As a preferred embodiment of the technical solution of the present invention, the method further includes:

[0041] When the vehicle engine is running and there is a need to adjust the seat temperature, the thermal management controller collects the set temperature TS of each seat. i Actual temperature of each seat cushion (TZ) i Ambient temperature T OUT Interior temperature T IN Light intensity, engine speed r;

[0042] When the maximum difference between the set temperature of each seat and the actual temperature of the seat cushion, T0 ≤ MAX{TZ i -TS i If}≤T1, no response is made;

[0043] When the actual temperature of each seat cushion is TZ i With seat set temperature TS i Maximum difference MAX{TZ i -TS i When T1 is reached, the thermal management controller starts the electronic water pump and adjusts the flow rate of each branch connected to the second flow control valve. At the same time, the thermal management controller adjusts the operating status of the variable displacement compressor.

[0044] When the actual temperature of each seat cushion is TZ i With seat set temperature TS i Maximum difference MAX{TZ i -TS i When T < T0, the thermal management controller starts the electronic water pump and adjusts the flow rate of each branch of the second flow control valve. Simultaneously, the thermal management controller adjusts the flow rate of each branch of the first flow control valve. The flow rate ratio between the passenger compartment heating and seat heating branches is QR1:QR2, where QR1 is the heat required for passenger compartment heating, and QR2 is the ambient temperature T. OUT Indoor temperature T IN A function of vehicle speed v, i.e., QR1 = f(T) OUT T IN QR2 represents the amount of heat required for seat heating, and QR2 represents the actual temperature of each seat cushion (TZ). i With seat set temperature TS i Maximum difference MAX{TZ i -TS iThe maximum difference corresponds to the actual seat temperature TZ and the interior temperature T. IN The function, i.e., QR2 = f(MAX{TZ) i -TS i}, TZ, T IN ).

[0045] As a preferred embodiment of the technical solution of the present invention, the step of adjusting the operating state of the variable displacement compressor by the thermal management controller includes:

[0046] If the variable displacement compressor is not in operation, the thermal management controller will start the variable displacement compressor. The compressor's displacement is set to the displacement Q2 required for seat cooling, where Q2 is the actual temperature TZ of each seat cushion. i With seat set temperature TS i Maximum difference MAX{TZ i -TS i The maximum difference corresponds to the actual seat temperature TZ and the interior temperature T. IN And a function of compressor speed r, i.e., Q2 = f(MAX{TZ) i -TS i}, TZ, T IN ,r);

[0047] If the variable displacement compressor is running, adjust the compressor displacement to Q0. Q0 consists of two parts: one part is the displacement Q1 required for refrigeration of the passenger compartment, and Q1 is the ambient temperature T. OUT Light intensity I, indoor temperature T IN And a function of the variable displacement compressor speed r, i.e., Q1 = f(T) OUT ,I,T IN The other part is the displacement Q2 required for seat cooling. The thermal management controller adjusts the opening of the first electronic expansion valve and the second electronic expansion valve. The initial ratio of the opening of the first electronic expansion valve and the second electronic expansion valve is Q1:Q2. After the system is running, it is adjusted according to the superheat of the evaporator in the passenger compartment and the outlet of the seat cooling heat exchanger.

[0048] As can be seen from the above technical solutions, the present invention has the following advantages:

[0049] 1. This invention can automatically adjust and control the seat temperature according to the occupant's seat temperature setting, so that the seat temperature is kept constant within the target temperature range, thereby improving the occupant's comfort.

[0050] 2. This invention adds seat temperature adjustment components to a traditional air conditioning system, sharing the air conditioning compressor and engine heat source with the traditional air conditioning system, which is easy to implement and has a low cost;

[0051] 3. This system can precisely control the compressor displacement according to different operating conditions, improve compressor utilization, and thus achieve the purpose of saving oil.

[0052] In addition, the present invention has a reliable design principle, a simple structure and a very broad application prospect.

[0053] Therefore, it is evident that the present invention has outstanding substantive features and significant progress compared with the prior art, and the beneficial effects of its implementation are also obvious. Attached Figure Description

[0054] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0055] Figure 1 This is a schematic diagram of the system structure according to an embodiment of the present invention.

[0056] Figure 2 This is a schematic diagram of the connection of a thermal management controller according to an embodiment of the present invention.

[0057] Figure 3 This is a flowchart of a seat adjustment control method according to an embodiment of the present invention.

[0058] In the diagram, 1-1- receiver-dryer, 1-2- electric water pump, 1-3- condenser, 1-4- first electronic expansion valve, 1-5- second electronic expansion valve, 1-6- driver's seat core, 1-7- variable displacement compressor, 1-8- passenger compartment evaporator, 1-9- seat cooling heat exchanger, 1-10- passenger seat core, 1-11- engine, 1-12- passenger compartment heater core, 1-13- seat heating heat exchanger, 1-14- second flow control valve, 1-15- rear seat Seat core, 1-16-First flow control valve, 2-1-Engine EMS, 2-2-Driver's seat temperature sensor, 2-3-Passenger's seat temperature sensor, 2-4-Rear seat temperature sensor, 2-5-Ambient temperature sensor, 2-6-Light intensity sensor, 2-7-Indoor temperature sensor, 2-8-Occupant compartment evaporator outlet pressure and temperature sensor, 2-9-Thermal management controller, 2-10-Central control screen, 2-11-Seat cooling heat exchanger outlet pressure and temperature sensor. Detailed Implementation

[0059] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0060] like Figure 1 and 2 As shown, this embodiment of the invention provides an automotive seat temperature regulation control system, including: a variable displacement compressor 1-7, a condenser 1-3, a liquid receiver dryer 1-1, a first electronic expansion valve 1-4, a second electronic expansion valve 1-5, a passenger compartment evaporator 1-8, a seat cooling heat exchanger 1-9, an engine 1-11, a first flow control valve 1-16, a passenger compartment heater core 1-12, a seat heating heat exchanger 1-13, an electronic water pump 1-2, a second flow control valve 1-14, a driver's seat core 1-6, a passenger seat core 1-10, and a rear seat core 1-15.

[0061] Specifically, the refrigerant-side inlet of seat cooling heat exchanger 1-9 is connected to the outlet of second electronic expansion valve 1-5, and the refrigerant-side outlet of seat cooling heat exchanger 1-9 is connected to the air inlet of variable displacement compressor 1-7. The inlet of second electronic expansion valve 1-5 is connected to the outlet of liquid receiver dryer 1-1, forming a parallel branch with passenger compartment evaporator 1-8. The heat source-side inlet of seat heating heat exchanger 1-13 is connected to the outlet of first flow control valve 1-16, and the heat source-side outlet of seat heating heat exchanger 1-13 is connected to engine 1-11 heater return port, forming a parallel branch with passenger compartment heater core 1-12. The coolant side inlet of seat cooling heat exchanger 1-9 is connected to the outlet of electronic water pump 1-2. The coolant side outlet of seat cooling heat exchanger 1-9 is connected to the seat heating circuit side inlet of seat heating heat exchanger 1-13. The seat temperature regulation circuit side outlet of seat heating heat exchanger 1-13 is connected to the inlet of second flow control valve 1-14. The outlet of second flow control valve 1-14 is connected to the inlet of driver's seat core 1-6, passenger seat core 1-10 and rear seat core 1-15 respectively. The outlets of driver's seat core 1-6, passenger seat core 1-10 and rear seat core 1-15 are connected to the inlet of electronic water pump 1-2.

[0062] The principle behind seat temperature regulation is explained below:

[0063] a. When the seat needs to be cooled, the variable displacement compressor 1-7 and the electronic water pump 1-2 are started. The displacement of the variable displacement compressor 1-7 and the opening of the second electronic expansion valve 1-5 are adjusted according to the seat cooling requirements. The coolant in the seat temperature regulation circuit is cooled in the seat cooling heat exchanger 1-9. The cooled coolant is distributed to the driver's seat core 1-6, the passenger seat core 1-10 and the rear seat core 1-15 through the second flow control valve 1-14, thereby achieving seat cooling. During this process, the first flow control valve 1-16 closes the flow on the heat source side of the seat heating heat exchanger 1-13 to ensure that the seat heating heat exchanger 1-13 does not heat the coolant in the seat temperature regulation circuit during the seat cooling process.

[0064] b. When the seat needs to be heated, the electronic water pump 1-2 is started. The first flow control valve 1-16 adjusts the flow rate on the heat source side of the seat heating heat exchanger 1-13 according to the seat heating demand. The coolant in the seat temperature regulation circuit is heated in the seat heating heat exchanger 1-13. The heated coolant is distributed to the driver's seat core 1-6, the passenger seat core 1-10 and the rear seat core 1-15 through the second flow control valve 1-14, thereby realizing seat heating.

[0065] The system also includes driver's seat temperature sensor 2-2, passenger seat temperature sensor 2-3, rear seat temperature sensor 2-4, ambient temperature sensor 2-5, light intensity sensor 2-6, interior temperature sensor 2-7, passenger compartment evaporator outlet pressure and temperature sensor 2-8, thermal management controller 2-9, central control screen 2-10, engine EMS 2-1, and seat cooling heat exchanger outlet pressure and temperature sensor 2-11;

[0066] The driver's seat temperature sensor 2-2, the passenger seat temperature sensor 2-3, and the rear seat temperature sensor 2-4 collect the corresponding seat cushion temperatures and input the information to the thermal management controller 2-9;

[0067] Ambient temperature sensor 2-5 and indoor temperature sensor 2-7 collect ambient temperature and vehicle interior temperature, and input the information to thermal management controller 2-9;

[0068] Light intensity sensor 2-6 collects light intensity data and inputs the information to thermal management controller 2-9;

[0069] The crew compartment evaporator outlet pressure and temperature sensor 2-8 and the seat cooling heat exchanger outlet pressure and temperature sensor 2-11 collect the refrigerant pressure and temperature at the crew compartment evaporator outlet and the seat cooling heat exchanger outlet, respectively, and input the information to the thermal management controller 2-9.

[0070] The central control screen 2-10 collects passenger seat temperature adjustment information and inputs the information to the thermal management controller 2-9;

[0071] Engine EMS2-1 collects engine speed and vehicle speed, and inputs the information to thermal management controller 2-9;

[0072] Thermal management controller 2-9 is the control module for the automotive air conditioning system and seat temperature control system. Based on input information such as passenger seat temperature control, seat cushion temperature, ambient temperature, vehicle interior temperature, light intensity, engine speed, and refrigerant pressure and temperature at the evaporator outlet in the passenger compartment and the seat cooling heat exchanger outlet, it controls the electronic water pump 1-2, the first flow control valve 1-16, the second flow control valve 1-14, the first electronic expansion valve 1-4, the second electronic expansion valve 1-5, and the variable displacement compressor 1-7. The specific control method is as follows:

[0073] When the vehicle engine 1-11 is running, and when there is a need to adjust the seat temperature, the thermal management controller 2-9 collects the set temperature TS of each seat. i Actual temperature of each seat cushion (TZ) i Ambient temperature T OUT Interior temperature T IN Light intensity, engine speed r: 1. When the maximum difference between the set temperature of each seat and the actual temperature of the seat cushion T0 ≤ MAX{TZ i -TS i When T1 ≤ T2, the seat temperature control system does not respond; 2. When the actual temperature of each seat cushion is T2... i With seat set temperature TS i Maximum difference MAX{TZ i -TS i When T1 is reached, the thermal management controller 2-9 starts the electronic water pump 1-2 and adjusts the flow rate of each branch of the second flow control valve 1-14. The flow rate ratio of the driver's side, passenger side, and rear branch is as follows: △ T 主驾 : △ T 副驾 : △ T 后排 Meanwhile, the thermal management controller 2-9 adjusts the operating status of the variable displacement compressor 1-7; specifically, if the variable displacement compressor 1-7 is not in operation, it should be started, with its initial displacement setting being the displacement Q2 required for seat cooling, where Q2 is the actual temperature TZ of each seat cushion. i With seat set temperature TS i Maximum difference MAX{TZ i -TS i The maximum difference corresponds to the actual seat temperature TZ and the interior temperature T.IN And a function of compressor speed r, i.e., Q2 = f(MAX{TZ) i -TS i}, TZ, T IN The displacement (r) can be obtained through calibration; if the variable displacement compressors 1-7 are running, adjust the displacement of the variable displacement compressors to Q0. Q0 is divided into two parts: one part is the displacement Q1 required for refrigeration of the passenger compartment, and Q1 is the ambient temperature T. OUT Light intensity I, indoor temperature T IN And a function of compressor speed r, i.e., Q1 = f(T) OUT ,I,T IN The other part is the displacement Q2 required for seat cooling, which can be obtained through calibration. The opening of the first electronic expansion valve 1-4 and the second electronic expansion valve 1-5 is adjusted. The initial ratio of the opening of the first electronic expansion valve 1-4 and the second electronic expansion valve 1-5 is Q1:Q2. After the system is running, it is adjusted according to the superheat at the outlet of the evaporator in the passenger compartment and the seat cooling heat exchanger. 3. When the actual temperature TZ of each seat cushion... i With seat set temperature TS i Maximum difference MAX{TZ i -TS i When T < T0, the thermal management controller 2-9 starts the electronic water pump 1-2 and adjusts the flow rate of each branch of the second flow control valve 1-14. The flow rate ratio of the driver's seat, passenger seat, and rear branch is as follows: △ T 主驾 : △ T 副驾 : △ T 后排 Simultaneously, the thermal management controller 2-9 adjusts the flow rates of each branch of the first flow control valve 1-16, and the flow rate ratio of the passenger compartment heating branch to the seat heating branch is QR1:QR2, where QR1 is the heat required for passenger compartment heating, which is the ambient temperature T. OUT Indoor temperature T IN A function of vehicle speed v, i.e., QR1 = f(T) OUT T IN (v), which can be obtained through calibration, QR2 is the heat required for seat heating, which is the actual temperature TZ of each seat cushion. i With seat set temperature TS i Maximum difference MAX{TZ i -TS i The maximum difference corresponds to the actual seat temperature TZ and the interior temperature T. IN The function, i.e., QR2 = f(MAX{TZ) i -TS i}, TZ, T IN This can be obtained through calibration.

[0074] like Figure 3 As shown in the figure, this invention provides a method for adjusting and controlling the temperature of a car seat. The method is based on the system described in the above embodiment and includes the following steps:

[0075] When the seats need to be cooled, the variable displacement compressor and electric water pump are started, and the first flow control valve is controlled to shut off the flow on the heat source side of the seat heating heat exchanger. The displacement of the variable displacement compressor and the opening of the second electronic expansion valve are adjusted according to the seat cooling requirements. The coolant in the seat temperature regulation circuit is cooled in the seat cooling heat exchanger. The cooled coolant is distributed to the driver's seat core, passenger seat core and rear seat core through the second flow control valve to achieve seat cooling.

[0076] When the seat needs to be heated, the electronic water pump is activated. The opening of the first flow control valve is controlled according to the seat heating demand to adjust the flow rate on the heat source side of the seat heating heat exchanger. The coolant in the seat temperature regulation circuit is heated in the seat heating heat exchanger. The heated coolant is then distributed to the driver's seat core, passenger seat core and rear seat core through the second flow control valve to achieve seat heating.

[0077] When the vehicle engine is running and there is a need to adjust the seat temperature, the thermal management controller collects the set temperature TS of each seat. i Actual temperature of each seat cushion (TZ) i Ambient temperature T OUT Interior temperature T IN Light intensity, engine speed r;

[0078] When the maximum difference between the set temperature of each seat and the actual temperature of the seat cushion, T0 ≤ MAX{TZ i -TS i If}≤T1, no response is made;

[0079] When the actual temperature of each seat cushion is TZ i With seat set temperature TS i Maximum difference MAX{TZ i -TS i When T1 is reached, the thermal management controller starts the electronic water pump and adjusts the flow rate of each branch connected to the second flow control valve. At the same time, the thermal management controller adjusts the operating status of the variable displacement compressor.

[0080] When the actual temperature of each seat cushion is TZ i With seat set temperature TS i Maximum difference MAX{TZ i -TS iWhen T < T0, the thermal management controller starts the electronic water pump and adjusts the flow rate of each branch of the second flow control valve. Simultaneously, the thermal management controller adjusts the flow rate of each branch of the first flow control valve. The flow rate ratio between the passenger compartment heating and seat heating branches is QR1:QR2, where QR1 is the heat required for passenger compartment heating, and QR2 is the ambient temperature T. OUT Indoor temperature T IN A function of vehicle speed v, i.e., QR1 = f(T) OUT T IN QR2 represents the amount of heat required for seat heating, and QR2 represents the actual temperature of each seat cushion (TZ). i With seat set temperature TS i Maximum difference MAX{TZ i -TS i The maximum difference corresponds to the actual seat temperature TZ and the interior temperature T. IN The function, i.e., QR2 = f(MAX{TZ) i -TS i}, TZ, T IN ).

[0081] Specifically, the steps for adjusting the operating status of a variable displacement compressor using a thermal management controller include:

[0082] If the variable displacement compressor is not in operation, the thermal management controller will start the variable displacement compressor. The compressor's displacement is set to the displacement Q2 required for seat cooling, where Q2 is the actual temperature TZ of each seat cushion. i With seat set temperature TS i Maximum difference MAX{TZ i -TS i The maximum difference corresponds to the actual seat temperature TZ and the interior temperature T. IN And a function of compressor speed r, i.e., Q2 = f(MAX{TZ) i -TS i}, TZ, T IN ,r);

[0083] If the variable displacement compressor is running, adjust the compressor displacement to Q0. Q0 consists of two parts: one part is the displacement Q1 required for refrigeration of the passenger compartment, and Q1 is the ambient temperature T. OUT Light intensity I, indoor temperature T IN And a function of the variable displacement compressor speed r, i.e., Q1 = f(T) OUT ,I,T INThe other part is the displacement Q2 required for seat cooling. The thermal management controller adjusts the opening of the first electronic expansion valve and the second electronic expansion valve. The initial ratio of the opening of the first electronic expansion valve and the second electronic expansion valve is Q1:Q2. After the system is running, it is adjusted according to the superheat of the evaporator in the passenger compartment and the outlet of the seat cooling heat exchanger.

[0084] Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, the invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the invention by those skilled in the art without departing from the spirit and essence of the invention, and such modifications or substitutions should all be within the scope of the invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the invention should also be covered within the protection scope of the invention. Therefore, the protection scope of the invention should be determined by the scope of the claims.

Claims

1. A car seat temperature adjustment control system, characterized in that, This includes the refrigeration system, heating system, driver's seat core, passenger seat core, and rear seat core; The driver's seat core, passenger seat core and rear seat core are connected in parallel, with one end connected to the refrigeration mechanism via an electronic water pump and the other end connected to the heating mechanism via a second flow control valve; The refrigeration mechanism is connected to the heating mechanism; The system also includes a thermal management controller and connected to the thermal management controller a driver's seat temperature sensor, a passenger seat temperature sensor, a rear seat temperature sensor, an ambient temperature sensor, a light intensity sensor, an interior temperature sensor, a central control screen, an engine EMS, and a refrigeration mechanism pressure and temperature sensor. The refrigeration and heating mechanisms are respectively connected to the thermal management controller, which controls the operation of the refrigeration or heating mechanism based on the information collected by the connected sensors. The refrigeration system includes a seat refrigeration heat exchanger. The refrigerant-side inlet of the seat refrigeration heat exchanger is connected to the outlet of a second electronic expansion valve. The refrigerant-side outlet of the seat refrigeration heat exchanger is connected to the inlet of a variable displacement compressor. The inlet of the second electronic expansion valve is connected to the outlet of a liquid receiver dryer. The outlet of the liquid receiver dryer is also connected to the inlet of the occupant compartment evaporator via a first electronic expansion valve. The outlet of the occupant compartment evaporator is connected to the inlet of the variable displacement compressor. The outlet of the variable displacement compressor is connected to the inlet of the condenser. The outlet of the condenser is connected to the inlet of the liquid receiver dryer. The coolant side inlet of the seat cooling heat exchanger is connected to the outlet of the electronic water pump, and the coolant side outlet of the seat cooling heat exchanger is connected to the inlet of the heating mechanism. The heating mechanism includes a seat heating heat exchanger. The heat source side inlet of the seat heating heat exchanger is connected to the outlet of a first flow control valve. The heat source side outlet of the seat heating heat exchanger is connected to an engine heater return port. The outlet of the first flow control valve is connected to the engine heater return port through the passenger compartment heater core. The seat temperature regulation circuit side outlet of the seat heating heat exchanger is connected to the inlet of a second flow control valve. The outlet of the second flow control valve is connected to the inlets of the driver's seat core, the passenger seat core, and the rear seat core, respectively. The coolant side outlet of the seat cooling heat exchanger is connected to the seat heating circuit side inlet of the seat heating heat exchanger.

2. The automotive seat temperature adjustment control system according to claim 1, characterized in that, A variable displacement compressor is used to compress low-temperature, low-pressure gaseous refrigerant into high-temperature, high-pressure gaseous refrigerant and discharge it. A condenser is used to condense the high-temperature, high-pressure gaseous refrigerant discharged from a variable displacement compressor into a medium-temperature, high-pressure liquid refrigerant. A liquid receiver dryer is used to store excess refrigerant in an air conditioning system, while also removing impurities and moisture from the refrigerant. The first electronic expansion valve is used for pressure reduction and throttling. At the same time, it receives instructions from the thermal management controller to adjust the opening degree, thereby regulating the refrigerant flow in the refrigeration branch of the passenger compartment. The second electronic expansion valve is used for pressure reduction and throttling. At the same time, it receives instructions from the thermal management controller to adjust the opening degree, thereby regulating the refrigerant flow in the seat cooling circuit. The crew compartment evaporator is used to evaporate the low-temperature, low-pressure liquid refrigerant after throttling from the first electronic expansion valve into gaseous refrigerant; Seat cooling heat exchangers are used to exchange heat between the coolant and the low-temperature refrigerant inside the seat cooling heat exchanger, thereby cooling the coolant.

3. The automotive seat temperature adjustment control system according to claim 2, characterized in that, The engine is used to provide heat for heating the crew compartment and seats. The first flow control valve is used to receive instructions from the thermal management controller to regulate the coolant flow rate of each branch; The passenger compartment heating core is used to heat the air by exchanging heat between the air flowing over its surface and the high-temperature coolant flowing inside it. The seat heating heat exchanger is used to exchange heat between the coolant in the seat heating circuit inside the seat heating heat exchanger and the high-temperature coolant in the heat source side circuit, thereby raising the temperature of the coolant.

4. The automotive seat temperature adjustment control system according to claim 3, characterized in that, The driver's seat core, passenger seat core, and rear seat core are used to exchange heat between the coolant inside each core and the surrounding environment of each seat cushion, thereby raising or lowering the temperature of each seat cushion. An electric water pump is used to power the circulation of coolant in the circuit, and at the same time, it receives instructions from the thermal management controller to regulate the flow rate of coolant in the circuit. The second flow control valve is used to receive instructions from the thermal management controller to adjust the flow rate of coolant in each seat branch of the seat temperature regulation circuit.

5. The automotive seat temperature adjustment control system according to claim 4, characterized in that, The driver's seat temperature sensor, the passenger seat temperature sensor, and the rear seat temperature sensor are used to collect the temperature of the corresponding seat cushions and input the information to the thermal management controller. An ambient temperature sensor is used to collect ambient temperature information and input the information to the thermal management controller; A light intensity sensor is used to collect light intensity information and input the information to the thermal management controller; An indoor temperature sensor is used to collect interior temperature information and input the information to the thermal management controller. The pressure and temperature sensors for the refrigeration system include the pressure and temperature sensor at the outlet of the evaporator in the passenger compartment and the pressure and temperature sensor at the outlet of the seat refrigeration heat exchanger. The crew compartment evaporator outlet pressure and temperature sensor is used to collect the pressure and temperature of the refrigerant at the outlet of the crew compartment evaporator in the crew compartment cooling branch, and input the information to the thermal management controller. The seat cooling heat exchanger outlet pressure and temperature sensor is used to collect the pressure and temperature of the refrigerant at the refrigerant side outlet of the seat cooling heat exchanger and input them to the thermal management controller. The central control screen is used to collect information on the temperature adjustment of the passenger seats and input it into the heating management controller; The engine EMS is used to collect engine speed and vehicle speed and input the information to the thermal management controller.

6. A method for regulating and controlling the temperature of a car seat, characterized in that, Includes the following steps: When the seats need to be cooled, the variable displacement compressor and electric water pump are started, and the first flow control valve is controlled to shut off the flow on the heat source side of the seat heating heat exchanger. The displacement of the variable displacement compressor and the opening of the second electronic expansion valve are adjusted according to the seat cooling requirements. The coolant in the seat temperature regulation circuit is cooled in the seat cooling heat exchanger. The cooled coolant is distributed to the driver's seat core, passenger seat core and rear seat core through the second flow control valve to achieve seat cooling. When the seat needs to be heated, the electronic water pump is activated. The opening of the first flow control valve is controlled according to the seat heating demand to adjust the flow rate on the heat source side of the seat heating heat exchanger. The coolant in the seat temperature regulation circuit is heated in the seat heating heat exchanger. The heated coolant is then distributed to the driver's seat core, passenger seat core and rear seat core through the second flow control valve to achieve seat heating.

7. The automotive seat temperature regulation and control method according to claim 6, characterized in that, The method also includes: When the vehicle engine is running and there is a need to adjust the seat temperature, the thermal management controller collects the set temperature TS of each seat. i Actual temperature of each seat cushion (TZ) i Ambient temperature T OUT Interior temperature T IN Light intensity, engine speed r; When the maximum difference between the set temperature of each seat and the actual temperature of the seat cushion, T0 ≤ MAX{TZ i -TS i If}≤T1, no response is made; When the actual temperature of each seat cushion is TZ i With seat set temperature TS i Maximum difference MAX{TZ i -TS i When T1 is reached, the thermal management controller starts the electronic water pump and adjusts the flow rate of each branch connected to the second flow control valve. At the same time, the thermal management controller adjusts the operating status of the variable displacement compressor. When the actual temperature of each seat cushion is TZ i With seat set temperature TS i Maximum difference MAX{TZ i -TS i When T < T0, the thermal management controller starts the electronic water pump and adjusts the flow rate of each branch of the second flow control valve. Simultaneously, the thermal management controller adjusts the flow rate of each branch of the first flow control valve. The flow rate ratio between the passenger compartment heating and seat heating branches is QR1:QR2, where QR1 is the heat required for passenger compartment heating, and QR2 is the ambient temperature T. OUT Indoor temperature T IN The speed of the vehicle is a function of v, i.e., QR1 = f(T) OUT T IN QR2 represents the amount of heat required for seat heating, and QR2 represents the actual temperature of each seat cushion (TZ). i With seat set temperature TS i Maximum difference MAX{TZ i -TS i The maximum difference corresponds to the actual seat temperature TZ and the interior temperature T. IN The function, i.e., QR2=f(MAX{TZ) i -TS i }, TZ, T IN ).

8. The automotive seat temperature regulation and control method according to claim 7, characterized in that, The steps for adjusting the operating status of a variable displacement compressor using a thermal management controller include: If the variable displacement compressor is not in operation, the thermal management controller will start the variable displacement compressor. The compressor's displacement is set to the displacement Q2 required for seat cooling, where Q2 is the actual temperature TZ of each seat cushion. i With seat set temperature TS i Maximum difference MAX{TZ i -TS i The maximum difference corresponds to the actual seat temperature TZ and the interior temperature T. IN And a function of compressor speed r, i.e., Q2=f(MAX{TZ) i -TS i }, TZ, T IN (r) If the variable displacement compressor is running, adjust the compressor displacement to Q0. Q0 consists of two parts: one part is the displacement Q1 required for refrigeration of the passenger compartment, and Q1 is the ambient temperature T. OUT Light intensity I, indoor temperature T IN And a function of the variable displacement compressor speed r, i.e., Q1=f(T) OUT ,I,T IN The other part is the displacement Q2 required for seat cooling. The thermal management controller adjusts the opening of the first electronic expansion valve and the second electronic expansion valve. The initial ratio of the opening of the first electronic expansion valve and the second electronic expansion valve is Q1:Q2. After the system is running, it is adjusted according to the superheat at the outlet of the evaporator of the passenger compartment and the seat cooling heat exchanger.

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