CN2869708Y

CN2869708Y - Automobile cold-heat-insulation box

Info

Publication number: CN2869708Y
Application number: CN 200620029873
Authority: CN
Inventors: 曾凡才; 徐成; 王笑平
Original assignee: TIANJIAN AUTOMOBILE PART CO Ltd ZHENGZHOU
Current assignee: TIANJIAN AUTOMOBILE PART CO Ltd ZHENGZHOU
Priority date: 2006-01-23
Filing date: 2006-01-23
Publication date: 2007-02-14
Anticipated expiration: 2016-01-23

Abstract

The utility model discloses a car temperature preservation tank containing a tank body, a temperature preservation room inside the tank body, a plurality of the semiconductor cooling fins inside the temperature preservation room, an operation key board and a light indicator on the face board of the tank body, and a control circuit of the semiconductor cooling fins inside the tank body. The semiconductor cooling fins control circuit comprises the high frequency DC/AC conversion and voltage conversion and rectification circuit, alternating current 220V conversion circuit, semiconductor cooling and heating control and fan control circuit and the operation, function control and protection circuit. The utility model has the advantage of applying the PLC technique and the reverse conversion technique to the car temperature preservation tank and adding up with overload, shortcut, overheat, overvoltage, auto shift relay, and auto shut down protection functions, simultaneously improving the product reliability. The utility model is convenient to operate by single key operation. The utility model outer shape is harmony with the cab devices by the integration design of the reverse conversion power resources and the temperature preservation tank.

Description

Automobile cold and warm insulation case

Technical field

The utility model relates to auto parts machinery, especially relates to automobile cold and warm insulation case.

Background technology

At present, the vehicle-mounted cold and warm insulation case product (also claiming the automobile refrigerator) on the domestic market generally all adopts three toggle switch controls.Control is simple, and switch is short service life, lacks necessary defencive function.Cause the damage of semiconductor cooler easily because of artificial maloperation.And if use alternating current 220V electrical equipment onboard, then must purchase Vehicular power inverter in addition, function is comparatively single, has brought inconvenience to the user.

The utility model content

The utility model purpose is to provide that a kind of operation is simple and reliable, the automobile cold and warm insulation case of long service life.

For achieving the above object, the utility model is taked following technical proposals:

Automobile cold and warm insulation case described in the utility model, it comprises casing, is arranged on the moist closet in the described casing and is arranged on the interior conductor refrigeration sheet of this moist closet, with the operation push-button, the indicator lamp that are arranged on the cabinet panel, and the control circuit that is arranged on conductor refrigeration sheet in the casing; The control circuit of described conductor refrigeration sheet is by high frequency DC/AC conversion, transformation, rectification circuit, the alternating current 220V translation circuit, semiconductor refrigerating, heat control, fan control circuitry and operation, function control is formed with holding circuit; Described high frequency DC/AC conversion, transformation, rectification circuit are made of circuit such as PWM controller U4, FET Q1, Q2, high frequency transformer T1, diode rectifications; Described alternating current 220V translation circuit is made of seven reverse driven U5, two reverse drivens and the bridge circuit formed of FET Q5, Q6, Q7, Q8 wherein; Described semiconductor refrigerating, heat control, fan control circuitry and be made of three terminal regulator U2, two single-pole double throw relay J IDIANQ11, JIDIANQ12 and seven reverse driven U5, two reverse drivens wherein, the reverse driven of seven reverse driven U5 constitutes fan control circuitry; Remaining two reverse drivens of seven reverse driven U5 can with the use in parallel of above-mentioned each reverse driven; Described operation, function control constitute with U6A, U6B, U6C, U6D and resistor network and the single-chip microcomputer U1 of holding circuit by four road voltage comparator U6.

Advantage of the present utility model is singlechip technology; inversion transformation technique is applied on the vehicle-mounted incubator product; increased overload, short circuit, overheated, overvoltage, automatic switchover time-delay, and autostop (behind engine misses, the 4 hours autostops of delaying time; avoid discharged or defective battery) etc. the kinds of protect function; realize the incorporate design of inverter and incubator, made the utility model whole harmonious with bridge equipment in shape, one integrated mass; the individual palpation key operation is adopted in operation, and is very convenient.The conductor refrigeration sheet heats or transfers when refrigeration to from heating transferring to from refrigeration, and requiring has time-delay in 5～15 minutes, otherwise very easily causes the damage of semiconductor cooler.And the utility model handoff delay is controlled automatically by single-chip microcomputer, and overload, short circuit, kinds of protect function such as overheated are arranged, thereby has improved reliability of products effectively.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is a schematic block circuit diagram of the present utility model.

Fig. 3 is high frequency DC/AC described in the utility model conversion, transformation, rectification circuit schematic diagram.

Fig. 4 is an alternating current 220V translation circuit schematic diagram described in the utility model.

Fig. 5 is semiconductor refrigerating described in the utility model, heat control, fan control circuitry schematic diagram.

Fig. 6 is operation described in the utility model, function control and holding circuit schematic diagram.

The specific embodiment

As shown in the figure, automobile cold and warm insulation case described in the utility model, it comprises casing 1, be arranged on the moist closet in the described casing 1, with the conductor refrigeration sheet that is arranged in this moist closet, and be arranged on operation push-button 2, indicator lamp 3 on casing 1 panel, and the control circuit that is arranged on conductor refrigeration sheet in the casing; The control circuit of described conductor refrigeration sheet is by high frequency DC/AC conversion, transformation, rectification circuit, the alternating current 220V translation circuit, semiconductor refrigerating, heat control, fan control circuitry and operation, function control is formed with holding circuit; Described high frequency DC/AC conversion, transformation, rectification circuit are made of PWM controller U4, FET Q1, Q2, high frequency transformer T1, diode rectification circuit; Described alternating current 220V translation circuit is made of the bridge circuit that U5E, U5C and FET Q5, Q6, Q7, the Q8 of seven reverse driven U5 forms; The control of described conductor refrigeration, pyrogenicity, fan control circuitry are made of U5B, the U5D of three terminal regulator U2, two single-pole double throw relay J IDIANQ11, JIDIANQ12 and seven reverse driven U5, and the U5F of seven reverse driven U5, U5G constitute fan control circuitry; Described operation, function control constitute with U6A, U6B, U6C, U6D and resistor network and the single-chip microcomputer U1 of holding circuit by four road voltage comparator U6.

Circuit working principle of the present utility model is as follows:

First: high frequency DC/AC conversion, transformation, rectification circuit

This partial circuit mainly finish will input the 24V power supply to the conversion of dc low-voltage and two groups of power supplys of high direct voltage.

By PWM controller U4 (SG3525A or KA3525A or function compatible integrated circuit) produce high frequency (control signal of 10K～500KHz), control two VMOS power field effect pipe Q1, Q2 alternate conduction and by; The elementary push pull mode that is operated in of high frequency transformer T1,24V power supply become high frequency square wave and are added on the primary coil under two effect tube power pipe Q1, Q2 drive; Obtain two groups of high frequency alternating sources in high frequency transformer T1 time level, behind high-frequency rectification, obtain low pressure (10～15V) and high pressure (200～320V) two groups of dc sources are respectively for semiconductor refrigerating/heat with alternating current 220V is exported use.

10 pin of PWM controller U4 are connected to any one IO pin on the single-chip microcomputer U1, and (the IO pin of single-chip microcomputer U1 is meant P1.0 ~ P1.7, and P3.0 ~ P3.5, P3.7 be one of totally 15 pin.As follows), whether work by the programme-control PWM controller U4 of single-chip microcomputer U1; The 16 pin output+5V power supplys of PWM controller U4, circuit uses on the power circuit board.Electrical network label V12OUT and+300 on Fig. 3 is respectively dc low-voltage and the high direct voltage after the conversion.

Second portion: alternating current 220V conversion

This partial circuit is mainly finished the conversion of high direct voltage to alternating current 220V/50Hz.

High direct voltage obtains alternating current 220V output after managing bridge-type (H type) the circuit conversion of forming by four high pressure FET Q5, Q6, Q7, Q8 on plug-in unit J6, be connected to the 220VAC socket; (other model of ULN2003 or MC1413 or function compatibility: the frequency driven of 50Hz is pressed in two unit darlington array seven reverse drivens) to bridge circuit by U5E, the U5C of seven reverse driven U5; Two 50Hz control signal AC50_1 that replace and AC50_2 produce by U1 is inner, through any two IO pin output of single-chip microcomputer U1.

Third part: semiconductor refrigerating/heat control, fan control circuitry

This partial circuit is mainly finished the work of control conductor refrigeration sheet and fan.

The conductor refrigeration sheet is by two single-pole double throw relay J IDIANQ11, JIDIANQ12 controls and conversion work mode, to control its refrigeration, heat or to quit work; The control signal of two relay J IDIANQ11, JIDIANQ12 is from any two IO pin of single-chip microcomputer U1; Plug-in unit J4 connects the conductor refrigeration sheet.Plug-in unit J3 wind-receiving fan; The control signal of fan is also from any one IO pin of single-chip microcomputer U1.

The 4th part: operation, function control and protection

This partial circuit is mainly finished to the function control of entire circuit with to fault detect, protection.

The detection that four road voltage comparator U6 (LM339 or function compatible integrated circuit) and some resistor networks finish whether high direct voltage is low excessively, whether power tube is overheated, whether the conductor refrigeration sheet is overheated; Whether too high resistor network RP21C, RP21D, RP31B, R14 finish the detection of input 24V dc source voltage; Resistor network RP21A and RP31C finish the detection whether lock is opened.The output of all detections is connected to the IO pin of single-chip microcomputer U1.

Single-chip microcomputer U1 (AT89C2051/1051/4051 or AT90S1200 or compatible single-chip microcomputer) has 15 IO pin, is used as following function:

1, an IO pin is controlled the work of PWM controller U4;

2, two IO pin provide two-way 50Hz signal for the bridge circuit work of being made up of FET Q5, Q6, Q7, Q8;

3, two IO pin provide control signal for the conductor refrigeration sheet;

4, an IO pin provides control signal for fan;

5, an IO pin connects button 2 on the panel, receives user's use operation;

6,3, three indicator lamps 3 of three IO pin three LED lights of connection are indicated refrigeration respectively, are heated the duty of exporting with 220VAC.User's all operations is finished (single key stroke) by three indicator lamps 3 and a button 2;

7, the output signal of five IO pin connection detection circuit is protected circuit abnormality.

Claims

1, a kind of automobile cold and warm insulation case, it comprises casing (1), be arranged on the moist closet in the described casing (1), with the conductor refrigeration sheet that is arranged in this moist closet, with the operation push-button (2), the indicator lamp (3) that are arranged on casing (1) panel, and be arranged on the inner conductor refrigeration sheet control circuit of casing (1); It is characterized in that: the control circuit of described conductor refrigeration sheet is by high frequency DC/AC conversion, transformation, rectification circuit, the alternating current 220V translation circuit, semiconductor refrigerating, heat control, fan control circuitry and operation, function control is formed with holding circuit; Described high frequency DC/AC conversion, transformation, rectification circuit are made of circuit such as PWM controller U4, FET Q1, Q2, high frequency transformer T1, diode rectifications; Described alternating current 220V translation circuit is made of seven reverse driven U5, two reverse drivens and the bridge circuit formed of FET Q5, Q6, Q7, Q8 wherein; Described semiconductor refrigerating, heat control, fan control circuitry and be made of three terminal regulator U2, two single-pole double throw relay J IDIANQ11, JIDIANQ12 and seven reverse driven U5, two reverse drivens wherein, the reverse driven of seven reverse driven U5 constitutes fan control circuitry; Remaining two reverse drivens of seven reverse driven U5 can with the use in parallel of above-mentioned each reverse driven; Described operation, function control constitute with U6A, U6B, U6C, U6D and resistor network and the single-chip microcomputer U1 of holding circuit by four road voltage comparator U6.