Novel control system of warm air system

Abstract

A control system of a novel warm air system comprises a thermoelectric module arranged in the warm air system, and the warm air system is communicated with a heat exchange water tank through a water inlet and a water outlet. A water inlet temperature sensor is arranged at the water inlet, a water outlet temperature sensor is arranged at the water outlet, a plurality of groups of hot surface sensors are mounted at the hot end of the thermoelectric module, and a plurality of groups of cold surface sensors are mounted at the cold end of the thermoelectric module; and the water inlet temperature sensor, the water outlet temperature sensor, the hot surface sensor and the cold surface sensor are all connected with the microcontroller. The thermoelectric module has the following beneficial effects that the temperature of the hot surface of the thermoelectric module is effectively controlled, and the long-term stability and reliability of the thermoelectric module are ensured.

Description

Technical Field

[0001] This utility model relates to a control system for a novel heating system. Background Technology

[0002] Existing electric vehicle heating systems do not provide waste heat from traditional internal combustion engines. Electric vehicles are usually equipped with electric heaters or other forms of auxiliary heating devices, and their control systems are more complex, requiring comprehensive consideration of factors such as battery range.

[0003] Thermoelectric modules are the main heating components in automotive heating systems. When a thermoelectric module is connected to direct current, one side of the module cools down while the other side heats up, creating a temperature difference. The heating efficiency of thermoelectric modules is typically greater than 1, usually between 1.3 and 1.7.

[0004] In existing technologies, there is no control over the temperature of the hot and cold surfaces of the thermoelectric module. Therefore, the operating temperature and reliability of the thermoelectric module are problematic. Utility Model Content

[0005] The technical problem to be solved by this utility model is: how to overcome the shortcomings of existing heating system control systems in terms of inlet and outlet water temperature, voltage and heating capacity control, and to provide a new type of control system for a power generation heating system, so as to achieve comprehensive, accurate and efficient control of the power generation heating system.

[0006] To solve the above problems, this utility model is achieved through the following technical solution:

[0007] A control system for a novel heating system includes a thermoelectric module installed within the heating system, wherein the heating system is connected to a hot water exchange tank via an inlet and an outlet.

[0008] An inlet temperature sensor is installed at the inlet, and an outlet temperature sensor is installed at the outlet. Multiple sets of hot surface sensors are installed at the hot end of the thermoelectric module, and multiple sets of cold surface sensors are installed at the cold end of the thermoelectric module. The inlet temperature sensor, outlet temperature sensor, hot surface sensor, and cold surface sensor are all connected to a microcontroller.

[0009] The thermoelectric module consists of four groups of thermoelectric module units connected in parallel, and each group of thermoelectric module units consists of 6 thermoelectric chips connected in series.

[0010] The total resistance of the four thermoelectric module units are respectively , , , The total resistance of the thermoelectric module formed by connecting four sets of individual thermoelectric modules in parallel is _____. The formula for calculating the resistance of each thermoelectric module unit is as follows:

[0011]

[0012] Where n is the length of the sequence; the values ​​of x are a, b, c, and d respectively; and the values ​​of j correspond to the values ​​of x as 0, 6, 12, and 18 respectively. This indicates the resistance value of each thermoelectric module;

[0013] The total resistance of the thermoelectric module is ;

[0014] The power supply voltage V across the thermoelectric module is then...

[0015] ;in, It is the Seebeck coefficient; I is the total current flowing through the thermoelectric module. It is the temperature difference between the hot and cold ends.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) Effective control of the hot surface temperature of the thermoelectric module ensures the long-term stability and reliability of the thermoelectric module.

[0018] (2) The precise control of the hot and cold surface temperatures of the thermoelectric module can adjust the output heat of the heating system in real time according to the target temperature set by the user and changes in the environment, ensuring that the heating system operates at the best heat exchange efficiency, while ensuring a comfortable temperature environment inside the vehicle. This enables the heating system to reduce the impact of temperature fluctuations and energy supply and demand imbalances on the system under various operating conditions, avoiding excessive energy consumption and waste, and thus controlling and improving heating efficiency.

[0019] (3) Monitor the inlet and outlet water temperatures of the system to ensure that the inlet and outlet water temperatures are always kept within a suitable range, optimize heat exchange efficiency, and ensure that the vehicle interior is in a comfortable temperature environment. Attached Figure Description

[0020] Figure 1 This is a sensor distribution diagram of the heating system of this utility model;

[0021] Figure 2 This is a structural diagram of the thermoelectric module;

[0022] Figure 3 This is a diagram showing the electrical connections between the various temperature sensors and the microcontroller. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] like Figure 1 , Figure 3 As shown, a control system for a novel heating system includes a thermoelectric module 102 installed in a heating system 101, wherein the heating system 101 is connected to a hot water exchange tank 103 through an inlet and an outlet.

[0026] An inlet temperature sensor 104 is provided at the inlet, and an outlet temperature sensor 105 is provided at the outlet. Multiple sets of hot surface sensors are installed at the hot end of the thermoelectric module 102, and multiple sets of cold surface sensors are installed at the cold end of the thermoelectric module 102. The inlet temperature sensor 104, the outlet temperature sensor 105, the hot surface sensors, and the cold surface sensors are all connected to a microcontroller.

[0027] like Figure 2 As shown, the thermoelectric module 102 is composed of four groups of thermoelectric module units connected in parallel, and each group of thermoelectric module units is composed of six thermoelectric chips 106 connected in series. A first hot surface sensor 1a is set at the hot end of the first group of thermoelectric module units, and a first cold surface sensor 1b is set at the cold end of the first group of thermoelectric module units; thus, the thermoelectric module 102 is provided with a total of first hot surface sensor 1a, second hot surface sensor 2a, third hot surface sensor 3a, fourth hot surface sensor 4a, first cold surface sensor 1b, second cold surface sensor 2b, third cold surface sensor 3b, and fourth cold surface sensor 4b.

[0028] The total resistance of the four thermoelectric module units are respectively , , , The total resistance of the thermoelectric module 102 formed by connecting the four sets of individual thermoelectric modules in parallel is 102. The formula for calculating the resistance of each thermoelectric module unit is as follows:

[0029]

[0030] Where n is the length of the sequence; the values ​​of x are a, b, c, and d respectively; and the values ​​of j correspond to the values ​​of x as 0, 6, 12, and 18 respectively. This indicates the resistance value of each thermoelectric module.

[0031] The total resistance of the thermoelectric module of the heater core is ;

[0032] When a thermoelectric module operates in heating mode, its heating capacity is typically close to its cooling capacity plus the input electrical power consumption. This is because, in heating mode, the thermoelectric module not only transfers the absorbed heat to the hot end but also converts the input electrical energy into heat energy and releases it. The calculation formula is as follows:

[0033]

[0034] in This is the heating capacity of the thermoelectric module under its current operating conditions; It is the Seebeck coefficient; I is the total current flowing through the thermoelectric module; It is the hot end temperature; This is the total resistance of the thermoelectric module; It is the total thermal conductivity, which includes the thermal conductivity of the material itself and the interfacial thermal resistance; It is the temperature difference between the hot and cold ends.

[0035] The heating capacity of a thermoelectric module involves multiple variables, including current, voltage, and temperature difference between the hot and cold surfaces. A smaller temperature difference helps to improve efficiency and heating capacity. , V This refers to the power supply voltage applied across the thermoelectric module. This invention utilizes PWM modulation with series and parallel thermoelectric modules to achieve different output voltages, ensuring the highest temperature at the hot end of the thermoelectric module remains below 80℃, thus guaranteeing stable and reliable operation and maintaining the module's lifespan. A temperature sensor monitors and controls the temperature difference between the hot and cold surfaces of the thermoelectric module in real time, controlling the heating capacity of the warm air core to maximize its output. Under different ambient temperatures and usage scenarios, it operates at optimal power, improving energy efficiency and extending the system's lifespan.

[0036] Figure 3The diagram shows the block diagram of the temperature detection module. The analog output pin of the temperature sensor is connected to the analog input pin of the microcontroller. The power supply GND pin is connected to both the GND pin of the temperature sensor and the GND pin of the microcontroller. The VCC pin of the power supply is connected to the VCC pin of the microcontroller. The microcontroller is responsible for reading the sensor data and performing logical judgments. The temperature detection module detects the real-time temperature of the hot and cold ends of the thermoelectric module and the real-time temperature of the air outlet of the vehicle heater through the temperature sensor.

[0037] In the automotive heating control system, the temperature of each point on the thermoelectric module and the real-time temperature of the vehicle's heater vents are monitored and collected in real time. Because the heating efficiency of the thermoelectric module decreases as the temperature difference between its cold and hot ends increases, leading to increased internal resistance, the control system determines the optimal heating efficiency based on the preset temperature difference range between the hot and cold ends of the thermoelectric module. It adjusts the heating capacity of the thermoelectric module according to this preset temperature difference, aiming to maintain a smaller temperature difference for better heating performance. When the hot end temperature of the thermoelectric module exceeds the set value, a MOSFET is used as a switching element to switch the load circuit on and off based on the PWM signal, preventing the hot end temperature of the thermoelectric module from exceeding the safe range and ensuring the long-term stability and reliability of the device. The system also monitors the inlet and outlet water temperatures to ensure they remain within a suitable range, optimizing heat exchange efficiency and maintaining a comfortable temperature environment inside the vehicle.

[0038] It should be noted that the PWM modulation method is an existing method, and the control method within the microcontroller is not within the protection scope of this utility model.

[0039] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.

Claims

1. A control system for a novel heating system, characterized in that: It includes a thermoelectric module (102) installed in a heating system (101), which is connected to a hot water tank (103) through an inlet and an outlet. An inlet temperature sensor (104) is provided at the inlet, and an outlet temperature sensor (105) is provided at the outlet. Multiple sets of hot surface sensors are installed at the hot end of the thermoelectric module (102), and multiple sets of cold surface sensors are installed at the cold end of the thermoelectric module (102). The inlet temperature sensor (104), outlet temperature sensor (105), hot surface sensor, and cold surface sensor are all connected to the microcontroller.

2. The control system of the novel heating system according to claim 1, characterized in that: The thermoelectric module (102) is composed of four groups of thermoelectric module units connected in parallel, and each group of thermoelectric module units is composed of 6 thermoelectric chips (106) connected in series.

3. The control system of the novel heating system according to claim 2, characterized in that: The total resistance of the four thermoelectric module units are respectively , , , The total resistance of the thermoelectric module (102) formed by connecting the four thermoelectric modules in parallel is _____. The formula for calculating the resistance of each thermoelectric module unit is as follows: Where n is the length of the sequence; the values ​​of x are a, b, c, and d respectively; and the values ​​of j correspond to the values ​​of x as 0, 6, 12, and 18 respectively. This indicates the resistance value of each thermoelectric module; The total resistance of the thermoelectric module is ; The power supply voltage V across the thermoelectric module (102) is then... ;in, It is the Seebeck coefficient; I is the total current flowing through the thermoelectric module. It is the temperature difference between the hot and cold ends.

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