CN207389119U - The interior timing refrigeration system that a kind of summer automobile high temperature utilizes - Google Patents

Abstract

The utility model belongs to the technical field of thermoelectric power generation, and in particular relates to a timing cooling system inside a car for high temperature utilization in summer. Aiming at the defects of high energy consumption and high pollution in the production process of solar panels, the utility model proposes a timing refrigeration system in the car for high temperature use in summer. The system consists of thermoelectric power generation chips, booster modules, voltage regulators, batteries, time controllers and air-conditioning compressors connected in sequence to form a self-closed loop cooling system; The temperature difference between the inside and outside of the car generates power, which is used for automotive air conditioners and other electrical equipment. The utility model can reduce fuel consumption and environmental pollution, and is a green and environmentally friendly power generation method with almost zero emissions. The utility model is not limited by whether the engine is turned on for the opening of the car air conditioner, and the owner of the car can set the timing system to When the air conditioner starts automatically, the design is more comfortable, convenient and humanized.

Description

A kind of timing cooling system inside the car for high temperature utilization in summer

technical field

The utility model belongs to the technical field of thermoelectric power generation, and in particular relates to a timing cooling system inside a car for high temperature utilization in summer.

Background technique

With the world's energy crisis, increasing environmental pollution and rapid population growth, human demand for energy is increasing, and there is an urgent need for new energy to replace traditional energy. The daily increase in domestic vehicles is closely related to energy and environmental issues. According to the report of the State Council, as of the end of 2016, the number of motor vehicles in China has exceeded 300 million. According to statistics, vehicles consume 1 kilowatt-hour of electricity and emit about 0.785KgCO ₂ , and consume 0.25Kg of gasoline. In today's energy shortage, it is necessary to develop new energy sources that are environmentally friendly for vehicles. It has gradually become the focus of the public, and its application prospects are very broad. The air-conditioning system is the most significant factor affecting fuel consumption in automobile accessories. The current automobile air-conditioning compressor is driven by the power of the engine through belt transmission, so it will consume more than 800W of engine power, thereby increasing the load on the engine, especially Small-displacement cars, after turning on the air conditioner, are obviously underpowered and unable to climb hills, which also increases the fuel consumption of the car. At present, the energy consumption of automobile refrigeration systems is mainly focused on fuel consumption. Photovoltaic power generation uses solar panels to directly convert sunlight energy into electrical energy. It has the advantages of no risk of depletion, safety and reliability, no noise, no pollution emissions, and high energy quality. However, the solar panel produces high pollution and high energy consumption during the production process. In addition, the solar panel also has the defects of low irradiation energy distribution density and high cost.

Utility model content

In view of the above problems, the utility model proposes a timing refrigeration system in the car for high temperature utilization in summer, including: a thermoelectric power generation chip, a boost module, a voltage stabilizer, a battery, a time controller and an air-conditioning compressor. The thermoelectric generators are combined in series and parallel to form an array of thermoelectric generators and laid on the roof of the car. The array of thermoelectric generators is connected with the booster module, voltage regulator, battery, time controller and air-conditioning compressor in sequence to form a self-closed loop. The circulating cooling system; the thermoelectric power generation sheet uses the temperature difference between the cold and heat sources to generate electricity; the boost module is used to boost the voltage generated by the thermoelectric power generation sheet to the rated voltage of the air conditioner compressor, so as to charge the battery requirements; the voltage stabilizer is used to keep the voltage generated at both ends of the thermoelectric generation sheet stable; the storage battery is used to store the electric energy generated by the thermoelectric generation sheet to supply power for air conditioner compressors, lighting systems, and audio systems; the time control The device is used to set the automatic start or close time of the air conditioner in the car, and automatically adjust the temperature in the car to a comfortable temperature.

An anti-reverse charge diode is connected between the storage battery and the voltage stabilizer to prevent that when the temperature difference is zero or small, the voltage at one end of the storage battery is higher than the voltage at one end of the thermoelectric generator, causing the battery to discharge to the thermoelectric generator and damage the circuit components.

Described accumulator selects the accumulator of 12V for use.

The thermoelectric power generation chip is a power generation chip with a model number of F40550, the open circuit voltage is 2.75V at a temperature difference of 40°C, and the power generation current is 500mA.

The hot end of the thermoelectric sheet is bonded to the roof iron sheet with heat-conducting adhesive, and then fixed with a metal frame, and the cold end of the thermoelectric sheet is in contact with the cold air in the car, so that the two ends of the thermoelectric sheet are kept at a certain distance. temperature difference to generate electricity.

The electric energy generated by the thermoelectric generation sheet array is stored in the storage battery through the control system, or directly supplies power to the electrical equipment in the vehicle.

The beneficial effects of the utility model are:

(1) A self-closed-loop timing cycle refrigeration system in the car proposed by the utility model does not need solar panels and heat-absorbing materials, and can make full use of the heat irradiated by solar energy on the vehicle body and the temperature difference between the two in the car to convert the internal energy into Electric energy is stored and supplied to automobile air conditioners and other electrical equipment to reduce fuel consumption and thereby reduce environmental pollution. In addition, compared with the same area of solar panels under the temperature difference of 40°C, the power generation increased by 58.7%. There is no discharge of waste gas and waste water during the energy conversion process, which is a power generation method with almost zero emissions to the environment. It is a green and environmentally friendly economy, which is of great significance to the sustainable development of human beings.

(2) The thermoelectric power generation adopted by the utility model does not need external mechanical moving parts, additional drive and transmission system, and has the advantages of compact structure, small volume and light weight. Using the thermoelectric power generation sheet, the heat energy can be directly converted into electric energy under a small temperature difference, and there is no noise, easy to install, and long-term maintenance-free.

(3) The utility model utilizes temperature difference to generate electricity, and the collected electric energy can be supplied not only to the automobile air-conditioning system, but also to other electrical equipment such as lighting systems and audio systems in the vehicle.

(4) The utility model is not restricted by whether the engine is turned on or not for the opening of the car air conditioner. Because the air conditioner timing switch system is installed in the car, the car owner can set the time for the car air conditioner to start automatically through the timing system, especially in summer. Turn on the air conditioner in advance before driving, so that the temperature in the car will drop to a comfortable temperature in advance, reducing the time for the owner to wait for heat dissipation, making it more comfortable, convenient and humanized.

Description of drawings

Accompanying drawing 1 is the structural diagram of the timing refrigeration system in the car based on temperature difference power generation;

Accompanying drawing 2 is the schematic diagram of laying way of thermoelectric generating sheet;

Detailed ways

The utility model is described in detail below in conjunction with accompanying drawing and embodiment.

Temperature difference power generation is a green and environmentally friendly power generation method. It can convert low-grade energy such as solar energy, geothermal energy, ocean thermal energy, and industrial waste heat into electric energy. Features A kind of timing refrigeration system is proposed in the car for high temperature utilization in summer. The refrigeration system requires a simple modification of the current vehicle, that is, a thermoelectric power generation sheet is installed on the top of the car, and the hot end of the power generation sheet is connected to the roof of the car through heat-conducting glue. The iron sheet is bonded, and then fixed with a metal frame to ensure good thermal conductivity between the roof and the power generation piece. The cold end of the thermoelectric power generation piece is in contact with the cold air in the car to maintain a certain temperature difference between the two ends of the power generation piece. , so as to use the temperature difference between the cold and heat sources of the thermoelectric power generation sheet to generate electricity. The electric energy generated by the thermoelectric generator is stored in the battery through the control system, or directly supplies power to other electrical equipment in the vehicle.

Specifically, as shown in Fig. 1, the structural diagram of the timing refrigeration system in a vehicle based on thermoelectric power generation, the refrigeration system includes a thermoelectric power generation chip, a boost module, a voltage stabilizer, a battery, a time controller and an air conditioner compressor, according to the vehicle Select a certain number of thermoelectric generators for the top area and combine them in series and parallel to form an array of thermoelectric generators and lay them on the top of the car. The laying method is shown in Figure 2; , the time controller and the air conditioner compressor are connected in sequence to form a self-closed loop cooling system; the thermoelectric power generation sheet uses the temperature difference between the cold and heat sources to generate electricity; the boost module is used to boost the voltage generated by the thermoelectric power generation sheet Voltage to the rated voltage of the air conditioner compressor to meet the requirements for charging the battery. For example, the rated voltage of the used car air conditioner compressor is 24V. In order to make the voltage generated by the power generation sheet meet the requirements for charging the battery, a booster module is required The voltage is boosted to above 24V; the voltage stabilizer is used to keep the voltage generated at both ends of the thermoelectric generating sheet stable, so as to overcome the voltage fluctuation at both ends of the generating sheet and cause damage to the circuit; the battery is used to store the electric energy generated by the thermoelectric generating sheet, Power supply for air-conditioning compressors, lighting systems, audio systems and other DC equipment; the time controller is a timing device for the air-conditioning system in the car, which is used to set the self-starting time of the air-conditioning in the car to automatically adjust the temperature in the car to a comfortable level temperature. When the set time is not reached, the time controller is equivalent to a disconnected switch, and the circuit charges the battery; when the set time is reached, the time controller is equivalent to a closed switch, and the power stored in the battery can be used in the car electrical equipment.

Specifically, due to the small size, thinness and good thermal conductivity of semiconductor thermoelectric power generation sheets, they can be laid in large numbers on the inner shell of the car roof to ensure good heat dissipation on the cold source surface. At present, the model of the power generation chip with better performance on the market is F40550 semiconductor thermoelectric power generation chip with a specification of 40*40*3.4mm. The parameters of the load power generation performance of a single thermoelectric power generation chip under different temperature difference conditions are shown in Table 1. Since the air in the car is in a circulating state and the air conditioner is turned on, the temperature of the cold source can be maintained at about 26°C, and the temperature of the roof iron sheet can reach 70-80°C. Therefore, when the temperature difference of the thermoelectric generator is between 20-60°C, Can achieve good results. The resistance of the independent car air conditioner is generally less than 5Ω. When the temperature difference is 40°C, the voltage generated by each power generation chip is about 1V, and the current is about 0.3A. According to statistics, the roof area of an ordinary car is about 1.6m ² . If it is covered with F40550 semiconductor thermoelectric generators with a specification of 40*40*3.4mm, about 1,000 thermoelectric generators of this type can be installed. The utility model adopts 10 generating pieces to be connected in series to form a generating set, and then there are 100 generating sets altogether. Therefore, the output voltage of the entire power generation chip array is about 12.6V, which can be used to charge the battery after boosting, and can also be used as a power supply for an independent air conditioner.

Table 2 shows the parameters of the load power generation performance of a single thermoelectric power generation sheet under the temperature difference condition.

Table 1 Basic parameters of F40550 semiconductor thermoelectric power generation chip

Table 2 The parameters of the power generation performance with load of a single thermoelectric power generation piece under the condition of temperature difference of 20-60 °C

In the utility model, the bottom of the iron sheet in the roof is covered with F40550 thermoelectric power generation sheets, and the car shell exposed to the sun is used as the heat source of the thermoelectric power generation sheets (the temperature is about 65°C). The cold air is used as the cold end of the thermoelectric power generation chip (temperature is about 25°C), and the temperature difference between the cold and heat sources (about 40°C) is used to generate electricity. The generated electricity is charged to the 12V battery through the control system, and the electricity stored in the battery After passing through the inverter, it is supplied to the car's air-conditioning system through the time controller installed on the main console. When the set time is not reached, the time controller is equivalent to a disconnected switch, and the circuit charges the battery; When setting the time, the time controller is equivalent to a closed switch, and the electricity stored in the battery can be used for other electrical equipment in the car. The time controller can control the opening time of the air-conditioning system to ensure that the air-conditioning can cool down the car in advance before the owner gets back in the car after leaving the car for a period of time. The excess power in the battery can be supplied to DC electrical equipment such as audio and lighting in the car. This utility model adopts a self-closed-loop cooling system, that is, the cool air in the vehicle room continuously cools the low-temperature surface of the power generation sheet, and the temperature of the high-temperature surface installed on the body surface remains unchanged, so it can always maintain a stable temperature difference, and the electric energy generated by the temperature difference It can drive the air conditioner compressor to cool the interior of the car, and cool the thermoelectric power generation sheet to form a closed-loop cycle, which can ensure the continuous operation of the device.

Taking the temperature difference of 40°C between the two ends of the thermoelectric generator as an example for analysis, as shown in Table 3, an ordinary independent car air conditioner consumes 0.3 degrees of electricity per hour.

Table 3 Data parameters of an ordinary independent car air conditioner

drive mode Voltage electric current power Detached 12V 15A 300W

It can be seen from Table 2 that when the output power of the thermoelectric generator is maximum, the output voltage of each generator is 1.26V, the output current is 0.253A, and the output power is 0.33W. Connect ten power generation chips in series as a power generation group, and 1000 power generation chips can form 100 power generation groups. get:

U _total = U ₀ × 10 = 1.26 × 10 = 12.6V

I _total = I ₀ × 100 = 0.253 × 100 = 25.3A

P _total = P ₀ × 1000 = 0.33 × 1000 = 330W

It can be seen that the output voltage of each generating set reaches 12.6V. If 100 generating sets are connected in parallel, the total current is about 25.3A and the maximum output power is 330W. Therefore, the system can generate 0.33 kWh of electricity for one hour under a temperature difference of 40°C.

Assuming that solar panels are installed on the roof with an area of 1.6m ² for photovoltaic power generation, according to the statistics of NASA, the annual sunshine in Beijing is 1430KW·h/(m ² ·year), under ideal conditions At noon, the area of 1m ² on the ground receives 1KW of sunlight energy from directly above, and the conversion efficiency of crystalline silicon solar cell modules is 13% to 15%. It can be calculated that the power of crystalline silicon solar cells is about 130W/m ² . Then about 0.208 kWh of electricity can be generated per hour on an area of 1.6m ² .

It can be seen that, compared with the solar panel, the thermoelectric power generation sheet adopted by the utility model has a power generation increased by 58.7%, and has a substantial effect of energy saving and emission reduction.

Next, through experiments to simulate the power generation and storage process of the thermoelectric power generation chip, verify the power generation performance of the thermoelectric power generation chip under the simulated ambient temperature difference, and the feasibility of the battery driving an independent air conditioning system.

In this experiment, a thermoelectric power generation chip with a model number of SP1848-27145 was used to generate electricity. The specific verification steps are as follows:

(1) The heating sheet is energized, and an infrared thermometer is used to measure the temperature of the heating sheet during the heating of the heating sheet to determine the final stable temperature th of the heating sheet;

(2) Turn on the air-conditioning fan, blow and dissipate heat on the cold source side of the thermoelectric generating sheet, and measure the temperature tc of the cold source side of the thermoelectric generating sheet by using an infrared thermometer;

(3) Use a multimeter to measure the voltage U and current I of the thermoelectric generator under the temperature difference of 20°C, 40°C, and 60°C respectively. The measurement results are shown in Table 4, and the output power of a single thermoelectric generator under the corresponding temperature difference can be obtained by calculation P, the calculation results are shown in Table 5;

(4) Connect 12 thermoelectric generators in series as a group, then connect the two groups of generators in parallel to the DC boost module, and adjust the knob of the boost module until the voltage shown by the multimeter is stable at about 14.5V;

(5) Connect the 12V battery after the booster module, charge it, and then connect the two output lines of the battery to the multimeter, and record the voltage U' shown by the multimeter and the load connected to R=1Ω When the current I', and calculate the output power P'; then compare with the rated voltage Uo, rated current Io and rated power Po of the independent air conditioning system.

Table 4 U, I of a single thermoelectric power generation piece measured at 20°C, 40°C and 60°C

Table 5 The power P of a single thermoelectric generator under the temperature difference of 20°C, 40°C and 60°C

Temperature difference Δt(℃) 20 40 60 Power P=UI(W) 0.2182 0.6624 1.1256

Experimental results: The effect of the thermoelectric power generation sheet is good, and the power supply to the independent air conditioning system can be realized through a certain series and parallel connection.

This embodiment is only a preferred specific implementation of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of it within the technical scope disclosed in the utility model Changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (6)

1. the interior timing refrigeration system that a kind of summer automobile high temperature utilizes, which is characterized in that including thermoelectric generation film, boosting mould Block, voltage-stablizer, accumulator, time controller and compressor of air conditioner, by multiple thermoelectric generation films according to series-parallel mode It is combined into thermo-electric generation chip arrays to be layed at the top of car, the thermo-electric generation chip arrays and boost module, voltage-stablizer, electric power storage Pond, time controller and compressor of air conditioner are sequentially connected, and form the circulating cooling system from closed loop；The thermoelectric generation film utilizes The temperature difference between Cooling and Heat Source generates electricity；The boost in voltage that the boost module is used to generate thermoelectric generation film is to air conditioner compressed The rated voltage of machine, to be reached for the requirement of accumulator charging；The voltage-stablizer is used for the electricity for generating thermoelectric generation film both ends Pressure keeps stablizing；The accumulator is used to store the electric energy of thermoelectric generation film generation, is compressor of air conditioner, lighting system, sound equipment System power supply；The time controller is used to setting voluntarily startup time of interior air-conditioning, and automatic adjustment vehicle interior temperature is to comfortable Temperature.

2. the interior timing refrigeration system that a kind of summer automobile high temperature according to claim 1 utilizes, which is characterized in that Anti-reverse charging diode is connected between the accumulator and voltage-stablizer, is prevented when the temperature difference is zero or is smaller, one terminal voltage of accumulator Higher than the voltage of thermoelectric generation film one end, accumulator is caused to discharge to thermoelectric generation film and damage circuit element.

3. the interior timing refrigeration system that a kind of summer automobile high temperature according to claim 1 utilizes, which is characterized in that institute State the accumulator that accumulator selects 12v.

4. the interior timing refrigeration system that a kind of summer automobile high temperature according to claim 1 utilizes, which is characterized in that institute The power generation sheet that thermoelectric generation film uses model F40550 is stated, open-circuit voltage is 2.75V under 40 DEG C of temperature difference, and generation current is 500mA。

5. the interior timing refrigeration system that a kind of summer automobile high temperature according to claim 1 utilizes, which is characterized in that institute The hot junction for stating thermoelectric generation film is bonded using heat-conducting glue with roof iron sheet, metal framework is recycled to be fixed, by the temperature difference The cold end of power generation sheet is contacted with interior cold air, the both ends of thermoelectric generation film is made to keep certain temperature difference, so as to generate electricity.

6. the interior timing refrigeration system that a kind of summer automobile high temperature according to claim 1 utilizes, which is characterized in that institute The electric energy for stating the generation of thermo-electric generation chip arrays is stored in accumulator by control system or directly interior electrical equipment is carried out Power supply.