[Semiconductor Cold Warm Box] Four Questions and Answers on Cold and Warm Boxes on car Cold Box on car Cold Box

In the current domestic market, there are as many companies that produce car refrigerators. Many small manufacturers, cut corners when they produce products, have a bad cooling and heat -making effect. If it is not used properly, it may cause damage to the car battery. ThereforeFriends must choose carefully.Many friends who do not know how to choose the car warm and warm box, they all have such questions, Xiaobian will give answers one by one here!

First, can the car warm and warm box make ice?

If you want to know if you can make ice in the car, you must first figure out its working principle.At present, the most car warm and warm boxes on the market are actually used to refrigerate with semiconductor materials. This material uses the Partia effect to work (please Baidu for children's shoes that do not understand), so the cooling effect may be worse than the compressor.Some, but this does not mean that the car warm and warm box cannot be made of ice.Some manufacturers' products, such as Deng Lupu's car warm and warm box, can still use the powerful refrigeration effect to make ice as long as they are equipped with an ice box and a partition.

Second, what are the attention of the Car refrigerator in daily use?

Many of the car refrigerators need to pay attention in daily use. First of all, it must be kept clean, especially at the ventilated port, because the heat inside the refrigerator is released here, and it will be troublesome if it is blocked.There are also daily cleaning and scrubbing with neutral soap and wet cloth. Do not insert electricity.The second is about temperature. It is best not to put very hot food into the Car refrigerator. In addition, because the power of the Car refrigerator is small, the refrigeration effect will not be as goodDrinking ice cold drinks when walking, it is recommended to refrigerate in the refrigerator first, and then put it in the Car refrigerator, which will be much better.

Third, will the Car refrigerator hurt the car battery?

Of course not.The power of the Car refrigerator is very small and generally does not exceed 100W. Such a small power cannot cause damage to the car battery.However, the owner should also pay attention to the daily use that the ordinary car thermal box, it is best not to use it for a long time after the car is stopped, which may cause the battery to put it.Therefore, when buying consumers, pay attention to choosing products with low -pressure protection functions, so that if you accidentally forget to pull out the cigarette barrel, it will not cause the car battery to put it.

Fourth, can the Car refrigerator be used at home?

Yes, but you need to be equipped with a home power converter.The function of the household power converter is to convert the voltage of 220V into a 12V voltage. With this thing, it can be used.

car warm and warm box

The car warm and warm box uses electronic refrigeration and heating technology, which is polluted and environmentally friendly. It can be placed on a seat or floor in the car. You can easily and conveniently put food at will. It has dual functions of refrigeration and heat.

It specially involves suitable for car supporting. It includes the main body of the warm and warm box, the tray, and the two -way plug. The main body of the warm and warm box is provided with semiconductor refrigeration elements. The main body of the warm and warm box is set on the tray., Double -directional power plug is inserted in the jack of the igniter.The product power supply is convenient. As long as the power plug is changed to the positive and negative polarity, the cold and warm box can achieve the effect of refrigerating or heating. In summer, cooling and warm in winter.People can heat cool drinks at any time during their journey.

Feature characteristic

With the dual function of refrigeration and thermal heat, it is very convenient to use, and it also increases the aesthetic effect in the car. It is suitable for use in long -distance travel, solving the problem of freshness, refrigeration, and heating of food and food during the operation of the company.The structure of the existing car body.Save space in the car, convenient and practical

Use

Cross the cigarette lighter plug with the car warm and warm box, and you can directly connect the car cigarette lighter. You do nt need to install it simply. You can choose the corresponding LED indicator light according to the cooling requirements.Heating, in order to achieve the ideal heating or refrigeration effect, preheat or refrigerate before putting food or drinks.Equipped with hot and cold conversion switch to adjust the hot and cold function.It is also suitable for workplace, Picnic, school, long -distance travel, Camping, party, beach and other places.

[GPS Technology] The main key technology of GPS chip is the three generations of GPS chips 9 major knowledge

With the development of science and technology, the development of GPS navigation is increasingly worth looking forward to, and the development of the core technology of GPS chip is the most worthy of our concern.In the process of the development of GPS chips, "miniaturization" has always been an important development direction, which has led the GPS chipset to reduce power consumption and reduce volume.The system can provide detailed and accurate positioning information and traffic information, which can easily achieve the CPS satellite navigation function.

In recent years, due to the increase in chip manufacturers and providing integrity solutions, module manufacturers are more likely to develop integrated products. Therefore, a large number of manufacturers have invested in the production of receiver products.The effect of helping the GPS boom has also caused the price of GPS chips with the highest cost of GPS machine costs, and the GPS chip used to provide consumer electronics products has also begun to show their figures. In addition, chip manufacturers have gradually improved their performance performanceTherefore, the chip positioning ability has gradually closer.Under this trend, how GPS chip products win the affirmation of buyers, and have become the key factor in competing with each GPS chip in the market.

Speaking of the main key technologies of GPS chips, this includes responsible signal processing -base frequency (Baseband) and receiving signal -RF (RF).Since the GPS signal frequency (1575.42MHz) comes from a high altitude of 20,000 kilometers from the ground, the signal is very unstable, so the antenna receiving signal has been enlarged, filtered noise, frequency reduction, and sampling (RFFRORONT END) after the antenna receiving signal, and then passes throughAfter RF, the signal enters the base frequency processing section, and the digital signal sampled in the previous paragraph is calculated and output to facilitate the use of user interfaces. Among them, the GPS Baseband DSP chip is the core component, which is responsible for processing the address signal.

Based on the above, the two parts of RF and the base frequency include micro -processor Microprocessar, low noise amplifier (LNA), digital ections, RF Section, antenna Ele -Ment.), Output into several important components of the drive (GPI andDrivers) and the PRO -CESSOR PERIPHERALS.The integration of various GPS chip solutions on the market makes the GPS chip market is facing great variables.The first is "miniaturization". Looking back at the development history of GPS chips in recent years, with the combination of GPS and other products, and emphasizing that the volume of the terminal product is light and short, the GPS chip direction of the system single chipization of the system is an inevitable trend.At present, manufacturers can divide radio frequency or base frequency single chips for GPS single -chipization, and integrate more functionality.In the RF chip part, many manufacturers have integrated amplifier, filter, frequency reduction, frequency synthesizer and oscillator;Flash), power management time clock, etc.

Therefore, we see that the size of the GPS chip has gradually narrowed, and the GPS chip has developed from a dual module to a single module. In the future, GPS equipment products will become more and more vigorous, and chip demand will become greater.In addition, GPS chips will also face customer -based demand. In the past, most GPS chips were in the automotive market.At present, GPS chip applications have begun to be used in mobile phones and PDAs, or special personal carrying devices, such as the tracker for the elderly and children.The GPS chip may also be integrated with other functions, such as Bluetooth, USB, etc.Therefore, more and more customized modules designed for special applications will also be increasing.At present, most of the global investment in GPS chip development is mostly with foreign manufacturers, such as Sirf, Ti, XEMICS, FreeScalc, STM and other large manufacturers have launched GPS chips. Among them, Sirf is the world's largest GPS chip manufacturer. The product line is quite complete and can provide a full range of series.Solution product.

GPSKnowledge descriptionGPS"Three -generation chip" knowledge

Recently, in GPS products, the so -called "three -generation chips" are often mentioned.However, neither merchants and users have clearly explained and understand, and even misleading and misunderstanding.Exchange your own experience and views with you.

1. GPS chip: There are currently three main chips on the international (common/more popular) GPS module (common/more popular) GPS module (common/more popular) GPS module (OEM board).

(1) American SIRF (SIRF)

(2) Sony (Sony Ericsson/Sony Ericsson) chip

(3) Swiss Nenem NEMERIX chip

2. The core of the third -generation chip:

The chip hardware is similar, but internal software plays a main role.The so -called core technology of the three generations is only to improve the software algorithm on the basis of the 2nd generation. It is like the formula for calculating the acceleration/speed in the primary and high school physics classes, but in the university's higher mathematics, the number of guides and points in the university to calculate the same acceleration/The physical problems (algorithms) of speed are different. The time used is very different. It reflects the difference between middle school and university, just like the 2nd and 3rd generations.The second is that the hardware also provides quality standards.

3. The main function of the three -generation chip software:

3 generations of chip software improvement upgrade: (1) Algorithm improvement improves the stars/positioning speed time.(2) Improve anti -interference performance, signal -to -noise ratio, and receive effective star numbers through software filters.(3) Some chip implementation software DR trace (rotation) calculation, improving anti -high -rise buildings, shade, underpass cover and tunnel function.(4) soft channel search, search to increase the number of channels for visual satellites (12-24), and can continue to position when personnel, vehicles, uphill, and posture changes, airplanes, and Ship star calendars changes.

4. Three -generation chip hardware improvement:

(1) The power consumption of the chip is reduced and the volume is reduced (compared with the 2nd generation).

(2) Improve anti -interference capacity, full shielding or dual chip separation.

5. GPS module and product:

gpsgpsEven wires, connectors, etc. look irrelevant components).

6, antenna is an important factor:

GPS antennas must be used in common GPS products such as handheld, PDA, Bluetooth, G-MOUSE, etc., regardless of active, passive, or even omniscient antenna, more than a dozen performance indicators, angle (except for 1600 maximum full antenna), DB of amplifiers, impedance range, material, anti-interference ability and module matching determine the performance of the entire product, and even 2-3 antennas (above and bottom) on the aircraft.position.In other words, the 3 -generation module is very good, and the antenna may not match the 2nd generation products.

7, number of channels:

Three stars are two-dimensional, 4 stars are three-dimensional positioning. This is the basic principle of GPS. We use 11-12 pieces on the ground (because the antenna is 160 degrees angle).) You can collect a few more (must be omnidirectional or more or more antennas), but it also takes 3-4 of the 3-4 signal and the nearest effective satellite for calculation positioning.Four channel positioning, a channel quickly search for all visual satellites, and compared with 4 of the effective stars, it is replaced by one of them, so that 4 strongest signal satellites are maintained.Therefore, the higher the passage, the better, the generally 12 are enough. What 16, 18, 20, 24 ... are soft channels, which reflect the number of visible satellites that can be searched for viewing satellites. It has no practical significance.

8. Induction (DB number):

The degree of induction of GPS receiving signal (-150-195DB) The standards of each manufacturer are not uniform, some are modules, some are modules contain antenna, some are the average, some are peaks (maximum value).Everyone's actual environment (electric field, magnetic field, high-voltage, microwave, geomagnetic ...) is very different. Therefore, the difference between this indicator is 3-5DB, which is not related to the order of order, but it is probably a approximate reference.

9. The obvious advantages of third -generation products (actual effects):

As long as the user needs to understand the specific technical indicators of the three -generation chip, it is more important to observe whether there is the following characteristics.

(1) Fast positioning time: Regardless of the cold start, Wen Qi, and the heat, the re-capture time is almost 5-30 seconds (compared to the second generation). In fact, most users are not worse than these ten seconds.

(2) High sensitivity: that is, in high -rise buildings, shade, underpass, cover files, Suidong, windows, cars, and even under the chassis of the car, you can quickly position more than 4 satellites.It is often said that it can be positioned a bit (single -star positioning), that is, "Give some Sunshine".

(3) Anti -interference performance: high -voltage lines, electric fields, magnetic fields, high -speed dynamics, microwaves, mobile phones, can still work properly in the environment of frequency interference.

(4) Low power consumption and power saving: reduce power consumption, and even have sleep state (static does not work), which can save power and improve product standby time.

(5) Small volume, good performance and price comparison: small volume and light weight. This is the needs and development trend of society, which can expand more application scope and field.In fact, the price of the three-generation chip should be the same as the second generation, or even lower, but the function is much improved. T-38 (16 channels, 3rd generations) 200-300 yuan/block.

GPS vehicle monitoring composition

The vehicle monitoring structure consists of a three -layer network comprehensive regulatory system formed by the vehicle terminal, the transmission network and the monitoring center to provide functions of vehicle anti -theft, anti -robbery, driving route monitoring, real -time wireless transmission of video images inside and outside the car, To solve the dynamic management of existing vehicles.

The vehicle monitoring uses a vehicle installation of the car video server with 3 to 4 cameras.The video server via EDGE/CDMA20001X/Wi-Fi network. The monitoring center can monitor and transmit real-time monitoring and transmission of images inside the vehicle. It also uses dual-order streaming technology. Local video uses D1 resolution. The network transmission uses CIF/QVGA/QCIF to distinguish the resolutionRate, realize local coding storage and remote storage.

The main composition of the vehicle monitoring system is divided into: vehicle terminal (vehicle video server), monitoring center, transmission network, etc.

GPS vehicle monitoring system working principle

1As well asGPSThe vehicle monitoring system consists of three parts: car host, server and client.The car host is mainly through the global satellite positioning system of the United States (GPS) To determine the position of the mobile target, upload data through the mobile communication network and the global Internet, the server receives positioning data and stores it. The client access the server to extract maps and vehicle positioning information through the global Internet access server.

2, Installed on the vehicleGPSThe receiver calculates the current location of the vehicle based on the received satellite information.GPSExtract the position, speed and time information required in the signal output of the receiver, combine information such as the vehicle identity, and other information to form a data packet, and then through the mobile operatorsGPRSThe network is sent to the monitoring center.The server of the monitoring center receives the data sent by the vehicle machine and extracts the positioning information from it. According to the vehicle number and group number of each vehicle, it is displayed on the electronic map of the monitoring center.At the same time, the system administrator of the control center can inquire about the operating conditions of each vehicle and reasonably dispatch the vehicle according to the traffic flow.

3The principle of the vehicle monitoring system determines that the system needs to rely on three networks to run reliable: the global satellite positioning system in the United States, China Mobile, China MobileGPRSThe global Internet network based on different operators.

4The vehicle monitoring management system consists of the vehicle machine and the monitoring and dispatch center. The information transmission depends on the public public network system. It does not need to be established alone, and also saves a lot of maintenance funds.

5, Vehicle Safety Monitoring Management System is inGSMOperation within the effective range of the public network, all car targets can be effectively tracking management within the scope of the network roaming range.GSMThe extension of technology will promote the simultaneous development of vehicle safety monitoring and management systems.The expansion of the network means the expansion of the actual tracking range.

6The vehicle safety monitoring management system adopts a multi -level architecture, which can be large or small. From groups to families, they can conduct various types of real -time tracking management of different natures for different overalls.The equipment is simple, the cost is moderate, and it is convenient to use.

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[Hot and warm box purchase] Which type of cool and warm box is better to use the warm and warm box to buy guidelines

The advantages and disadvantages of semiconductor refrigeration (heat)

1. Volume and cost.No compressor is required, not only is the volume and small costs very low, but it can be reflected and heated.

2. Refrigeration temperature and heating temperature.Most of the minimum refrigeration temperature is about 6 degrees Celsius; the temperature difference between the minimum temperature and the environmental temperature does not exceed 20-25 degrees Celsius; the maximum heating temperature is about 65 degrees Celsius.

Large and medium vehicles can choose to compress the model Car refrigerator

1. RV, bus, and business models are larger. For large and medium -sized vehicles with larger compartment, if you need to be stronger, faster, and more constant, the refrigeration performance is required.The Car refrigerator is the first choice.

2. Power interface.Large and medium -sized vehicles are sufficient, and can even provide 220V standard power port and power output power above 500W.

3. Compressed models of car refrigerators usually have no heating function.

Don't ignore the thermal insulation and heating function

1. Thermal insulation effect.The cabinet of the car's warm and warm box is thick and good thermal insulation performance, and it should have good thermal insulation (cold) performance.

2. The heating function is more practical.In winter, many regions do not need to refrigerate (the trunk is an excellent "refrigerator"), but enjoying a hot food and drinks in the itinerary often become extravagant.The insulation and heating function of the car warm and warm box uses the place where it is displayed at this time.3. Heating is more efficient than cooling.Fortunately, the heating speed of the car warm and warm box is relatively faster and more efficient, and the temperature limit of the maximum 65 degrees Celsius is enough to meet daily needs.

The relationship between capacity, refrigeration speed and power

1. The larger the capacity, the slower the cooling (thermal).For example, for example: 60W power 4 -liter of mini warm and warm box. At the temperature of 28 degrees Celsius, the temperature in the box (empty box) can be reduced to 6 degrees Celsius in about 3 small, but if it is also 60W power 8 liters, if it is also 60W power 8 liters, 8 liters of power 8 litersThe cooling and warm box of capacity may take more than 6 hours to fall to 6 degrees Celsius.

2. The smaller the power, the slower the cooling (thermal).Play another less accurate analogy: a 60W power 4 -liter mini warm and warm box. If it is 3 hours of refrigeration to 6 degrees Celsius, if it is replaced by 30W power, this time may be extended to more than 6 hours (Little Mara Grandcar).

3. Cold and warm boxes with small capacity and high power.In order to ensure good refrigeration efficiency, under the premise of sufficient capacity, high -power, small -capacity warm and warm box may be the best choice.

Factors affecting cooling (thermal) efficiency

1. Environmental temperature.The higher the ambient temperature, the slower the cooling speed of the car in the car, and the faster the heating speed; vice versa.

2. The items to be stored.If a bottle of boiling water wants to refrigerate, the effect of putting in the car hot and warm box is not as effective as opening the bottle cap for a few hours; if it is a piece of ice, if you want to be discharged, the effect of putting in the car warm and warm box may be in the sun.The difference is not much different.

3. Pre -cold (hot) food and drink.In order to achieve rapid and efficient cooling or heating, it is necessary to put food that need to be refrigerated in advance in the home refrigerator in advance, or heat the food that needs heating in advance in the microwave oven, which can achieve faster, more efficient, more efficient, more efficient, more efficientConstant cooling or heating effect.

4. It is strongly recommended to use ice Bags or iced bottles of water to assist cold, which is more efficient and more constant.

The necessity of the car family dual -use warm and warm box

1. Innonal air is not that you can come.Many car owners complain that the cooling speed of the car warm and warm box is slow. It is known that a bottle of constant warm water is placed in the Car refrigerator for 1 hour and has not changed much.The slow cooling speed is indeed the embarrassment of the car warm and warm box, which is also the time when the advantages of the cool and cold box of the car family.Housewriters can be used on the car or connect to the ordinary power supply at home, which can be used at home. It can work almost in any place with a power supply to maximize the temperature loss and fluctuations caused by power interruption.

2. Use the car warm and warm box in the home environment.The working principle of the car warm and warm box is similar to that kind of refrigerated heat -made dual -use water dispenser. If necessary, you can use the car warm and warm box in the home environment through the power transferor, which makes the advantages of the dual -use of the car.Essence

[motorcycle GPS locator] motorcycle GPS anti -theft, electric vehicle GPS anti -theft device

Working method of joining the magazine motorcycle GPS anti -theft device positioner:

1. Triple positioning: GPS positioning GPSONE positioning base station positioning:

There is no blind spot for positioning throughout the journey.In the occasion where the search satellite is lower than three, the system automatically turnsgpsone Positioning, if you can't search for any satellite, you can convert to the base station positioning, that is, where there is a mobile phone signal, you can locate.

2. Vibration is the alarm, and the movement is tracking:

The system turns from static to dynamic(( Move or vibrate Cure , That is, the alarm tracking.

3.. Diversity of real -time dynamic positioning information:

a. SMS reply to the current Chinese geographic location information of the vehicle

b. Log in to the trajectory website, you can query the sports trajectory and download the sports trajectory text information.

4. 4.. Low voltage alarm:

When the product has a built -in battery low voltage, the system automatically SMS prompts the user to charge in time.

5. Electronic fence:

Anti -theft motorcycle enters or moves a certain setting area, alarm tracking

motorcycleGPS Features of anti -theft positioner:

GSM Four -frequency system global universal;

High sensitivity GPS Receive chips;

Built -in high sensitivity GPS Antenna, super receiving performance;

High integration design;

The world's only double built -in antenna (GSM ,, GPS) design vehicle terminal;

Built -in switching power supply, ultra -wide voltage input range;

Built -in vibration sensor to achieve intelligent anti -theft of vehicles;

Support ACC Detection, the vehicle starts the alarm;

It can be connected to an external relay to achieve remote control of vehicle oil and electricity;

Can be set up 3 A specific number is used for SOS Alarm and anti -theft alarm;

Can be connected SOS The alarm button is used for emergency call for help;

You can connect the microphone to achieve remote voice monitoring function;

Built -in spare battery to realize illegal cutting alarms;

Compatible with external device serial communication.

At present, motorcycle anti -theft methods are mainly to install various anti -theft locks and configuration sound -light alarms, but these are not difficult to get theft gangs, and vehicles cannot be tracked. Society urgently needs a new way to prevent theft and the theft of theft.motorcycle anti -theft technology to change the status quo. This is the motorcycle GPS anti -theft device positioner. The motorcycle GPS anti -theft alarm tracker reminds the owner in time during the thief's theft of the vehicle.Tracks, recover vehicles, and assist public security organs to catch criminals.

Electric carGPS Anti -theft device introduces electric vehicles GPS The anti -theft device is specially designed for electric vehicle motorcycles GPS anti -theft alarm tracker, with a variety of product forms, divided into installation types and free installation types. It has strong concealment, high safety, and working on all day.After being stolen, he could recover the stolen vehicle and capture criminals, which won the love of the majority of electric vehicle owners.

Four special features Besides

1. 1. Add Chinese SMS address reply function (( hair DW SMS to the traffic card mobile phone number in the machine, it will automatically return to the Chinese address Cure

2. Intelligent electricity saving. When the car is still, the machine will enter a dormant state, almost no longer consume power, and no longer worry about the power consumption of electricity when the car is not used for a long time, green and environmentally friendly.

3.. The positioning accuracy is higher, and the enhanced data processing is more accurate. It is adopted GPS Global satellite positioning data accurate positioning error accuracy can reach 10 About rice (( There are many more on the market 100 The positioner that is not available, most of this positioner is GSM Base station positioning equipment Cure

4. mobile phone mobile positioning, mobile phone check -up software supports smartphones in real -time mobile monitoring trajectory and other operations, convenient and fast