CN204513841U - Temperature control electronic cold case lid - Google Patents
Temperature control electronic cold case lid Download PDFInfo
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- CN204513841U CN204513841U CN201520127977.XU CN201520127977U CN204513841U CN 204513841 U CN204513841 U CN 204513841U CN 201520127977 U CN201520127977 U CN 201520127977U CN 204513841 U CN204513841 U CN 204513841U
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- temperature control
- power supply
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- case lid
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Abstract
The utility model provides a kind of temperature control electronic cold case lid, comprise refrigerating assembly, also comprise the temperature control module of the output being connected to the power supply of powering for described refrigerating assembly, described temperature control module controls the output voltage of described power supply, thus the power controlling described refrigerating assembly is to carry out temperature control.Described temperature control module comprises the first bleeder circuit, between the output that described first bleeder circuit is connected in described power supply in parallel and ground, it comprises the first resistance and potentiometer that are connected in series, and one end that described potentiometer is connected with described first resistance is also connected to the first reference voltage, other end ground connection.Temperature control electronic cold case lid of the present utility model, by increasing temperature control module, makes complete machine power adjustable in 0 ~ 70W scope, can either economize energy, is convenient to user operation again.
Description
Technical field
The utility model relates to electronic cold case lid, particularly a kind of electronic cold case lid of controllable temperature.
Background technology
Conductor refrigeration is also called thermoelectric (al) cooling or thermoelectric cooling.There is the material of thermoelectric energy transformational, having refrigerating function by during direct current, thermoelectric cooling of therefore gaining the name.Semiconductor cooler operationally passes to direct current, makes the refrigeration of assembly one side, is referred to as huyashi-chuuka (cold chinese-style noodles); One side pyrogenicity, is referred to as hot side.Cold scattering (heat) device is installed on cold and hot two sides, to realize the object of refrigeration (heat).
Normal and the supporting case bucket of electronic cold case lid with the use of, to reach cooling effect.The cool and heat ends Aluminium Radiator that refrigerator used often adopts structure identical, after heat-conducting silicone grease is coated on cold and hot two surfaces of refrigerator, adopt with cold and hot end radiator and be mechanically connected, with fan forced ventilation cooling hot junction radiator, cold junction is exchanged by heat in cold guide apparatus cold scattering and case.Cold and hot surface is isolated by the foam of refrigerator surrounding heat insulating effect excellence.
Refrigerator power supply used can be dry cell, battery, dc source or rectifier power source.Can by refrigeratory capacity and the cold temperatures regulating the operating voltage of refrigerator to change it.
The temperature control method of existing electronic cold case lid mostly adopts temperature switch or temperature sensor to add control program to realize.
1) temperature switch is the switch of a kind of bimetal leaf as temperature-sensing element.Generally by temperature switch and refrigerator series connection during application, after the temperature of temperature switch induction reaches operating temperature, just cut off circuit, refrigerator is quit work, after temperature sensor reaches recovery temperature, connect again circuit and refrigerator is resumed work.Although this mode reliability is high, its controlled temperature spot only has operating temperature and recovery temperature, is namely operated in ON and OFF two states, and controlled temperature range is limited to, and does not utilize user to the demand of temperature.
2) to add the principle of this mode of control program different with the control mode of temperature switch for temperature sensor, and the program utilizing single-chip microcomputer on control panel to design controls.Temperature sensor is a thermistor, and resistance can change along with variations in temperature, and control panel is exactly the work controlling refrigerator according to the change in resistance of sensor, controls refrigerating sheet under ON and OFF two kinds of shape shapes according to the setting of user, and control principle is complicated.
Utility model content
For this reason, the utility model provides a kind of temperature control electronic cold case lid, comprise refrigerating assembly, also comprise the temperature control module of the output being connected to the power supply of powering for described refrigerating assembly, described temperature control module controls the output voltage of described power supply, thus the power controlling described refrigerating assembly is to carry out temperature control.
Further, described temperature control module comprises the first bleeder circuit, between the output that described first bleeder circuit is connected in described power supply in parallel and ground, it comprises the first resistance and potentiometer that are connected in series, and one end that described potentiometer is connected with described first resistance is also connected to the first reference voltage, other end ground connection.
Further, described power supply comprises electric main input module, described electric main input module comprises the PWM controller of output pulse width modulation signal, the break-make of described pulse-width signal gauge tap pipe thus convert to obtain the output voltage that DC voltage is described power supply to the alternating voltage of input; Described temperature control module also comprises voltage sampling circuit and feedback voltage stabilizing circuit, and wherein, described voltage sampling circuit is the second bleeder circuit, and between the output that described second bleeder circuit is connected in described power supply in parallel and ground, it exports sampled voltage; Described feedback voltage stabilizing circuit comprises photo-coupler and described PWM controller, one end of the input of described photo-coupler is connected to described sampled voltage, the other end is connected to the second reference voltage, and the output voltage of described photo-coupler is connected to the reference voltage end of described PWM controller.
Preferably, described temperature control module also comprises the triode between output and ground being connected to described power supply, the base stage of described triode by the second resistance be connected to described power supply output and by the switch ground connection of described potentiometer.
Further, described power supply also comprises vehicle power input module and electrical source exchange module, and described electrical source exchange module controls described vehicle power input module and described electric main input module is powered to described refrigerating assembly.Described electrical source exchange module comprises relay, and the two ends of the coil of described relay are connected to the positive and negative two ends of described vehicle power input module respectively, and the anode of described vehicle power input module is connected with the normally opened contact of described relay.
Temperature control electronic cold case lid of the present utility model, utilizes stepless power regulation technology, makes the cold temperatures of electronic cold case lid adjustable, with user under adapting to varying environment temperature to the demand of cooling effect.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of the power unit of temperature control electronic cold case lid of the present utility model;
Fig. 2 is the structural representation of the partial circuit of temperature control module in Fig. 1;
Fig. 3 is the electrical block diagram of electrical source exchange module in Fig. 1;
Fig. 4 is the front view of temperature control electronic cold case lid of the present utility model;
Fig. 5 is the upward view of temperature control electronic cold case lid of the present utility model.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, temperature control electronic cold case lid of the present utility model is described in further detail, but not as to restriction of the present utility model.
Temperature control electronic cold case lid of the present utility model, comprise refrigerating assembly, also comprise the temperature control module of the output end vo being connected to the power supply of powering for refrigerating assembly, with reference to Fig. 1-3, this temperature control module controls the output voltage Vo of power supply, thus the power of control refrigerating assembly is to carry out temperature control.
This temperature control module comprises the first bleeder circuit, this first bleeder circuit is connected between the output end vo of power supply and ground GND, it comprises one end that the first resistance R16 of being connected in series and potentiometer Ra, potentiometer Ra be connected with the first resistance R16 and is also connected to the first reference voltage V s, its other end ground connection.Can be produced by a voltage-reference IC3 with reference to Fig. 2, the first reference voltage V s.
Especially, this temperature control module also comprises the triode Q3 between the output end vo that is connected to power supply and ground GND, the base stage of triode Q3 by the second resistance R28 be connected to power supply output end vo and by the interrupteur SW ground connection GND of potentiometer Ra.
When potentiometer Ra shutoff and interrupteur SW disconnect, triode Q3 conducting, its collector voltage is 0V, power supply no-output, and refrigerating system does not work, and complete machine power consumption is 0W.It is lower that this kind of state is generally used in environment temperature, such as 16 DEG C time.
When potentiometer Ra open i.e. interrupteur SW closed after, triode Q3 ends, and power supply is started working and exported DC voltage Vo.Regulator potentiometer Ra, the power consumption of complete machine changes along with the change of potentiometer Ra resistance.When potentiometer Ra is firm open time, the resistance of potentiometer Ra is maximum 50K Ω, i.e. Ra=50K Ω, voltage between node AB is the output voltage Vs of reference voltage source IC3, be such as 2.5V, use Ohm's law can calculate output voltage Vo=2.5+ (R16*2.5/50K Ω), if R16=15K is Ω, then Vo=3.25V, now complete machine power consumption is about 5W.
As can be seen from the computing formula of electric power output voltage Vo, the resistance of regulator potentiometer Ra, can regulate the power supply of electronic cold case lid to the supply voltage Vo of refrigerating system, thus regulates cooling power, to realize the adjustable object of cold temperatures in case.As environment temperature raises, adjustable potentiometer Ra makes the power of refrigerating assembly increase, and meets the requirement of user to cooling effect; As environment temperature reduces, make the power reduction of refrigerating assembly by regulator potentiometer Ra, meet the demands.
When environment temperature is less than 16 DEG C, the potentiometer 5 on case lid can be adjusted to OFF state (see Fig. 4,5), i.e. run-stopping status; When environment temperature is about 25 DEG C, the knob gear of potentiometer 5 is adjusted to ECO (energy saver mode) shelves, under this state, the temperature in refrigerating box can reach less than 17 DEG C, and now complete machine power consumption is less than 9.5W; When environment temperature is about 32 DEG C, the knob of potentiometer 5 is adjusted to MAX gear, now ice chest lid is operated in about peak power 70W, and the temperature in refrigerating box can reach less than 15 DEG C.
As shown in Figure 1, power supply comprises electric main input module, and it is that refrigerating assembly is powered by AC/DC Switching Power Supply.AC/DC Switching Power Supply adopts the PWM controller IC1 of technology maturation, the pulse-width signal that PWM controller IC1 exports makes switching tube Q1 ceaselessly " connection " and " shutoff ", switching tube Q1 is allowed to carry out impulse modulation to input voltage, thus realize the voltage transformation of AC/DC, obtain galvanic current pressure Vo at output.Because switching tube Q1 is operated on off state, so the power consumption on switching tube Q1 is very little, the conversion efficiency of power source integral can reach more than 83%.
Further, with reference to figure 2, temperature control module also comprises voltage sampling circuit and feedback voltage stabilizing circuit, and wherein, voltage sampling circuit is the second bleeder circuit, and this second bleeder circuit is connected in parallel between the output end vo of power supply and ground GND, and it exports sampled voltage Vp; Feedback voltage stabilizing circuit comprises photo-coupler IC2 and PWM controller IC1, one end of the input of photo-coupler IC2 is connected to sampled voltage Vp, the other end is connected to the second reference voltage, and (this second reference voltage can be identical with the first reference voltage, such as, be Vs), the output voltage of photo-coupler IC2 is connected to the reference voltage end Vref of PWM controller IC1 (i.e. the 2nd pin of PWM controller IC1).
By regulating the second bleeder circuit be made up of resistance R18, R19 to obtain sampled voltage Vp, the reference voltage V s that this sampled voltage Vp and reference voltage source IC3 provides compares:
When the output voltage Vo of power supply is setting value, sampled voltage Vp is equal with reference voltage V s, the electric current flowing through optocoupler IC2 primary side diode is constant, and then the electric current flowing through optocoupler primary side is also constant, then feed back to the feedback level Vref of the 2nd pin of PWM controller IC1 also constant (the 2nd pin of IC1 is connected with the 3rd pin), the dutycycle of pulse-width signal that 8th pin of PWM controller IC1 exports is also constant, and to be therefore stabilized in setting value constant for output voltage Vo.
When output voltage Vo because of certain reason higher than setting value time, the sampled voltage Vp that second bleeder circuit obtains can increase, the electric current flowing through the primary side diode of optocoupler IC2 increases, and then flow through secondary electric current and also increase, thus the current potential feeding back to the 2nd pin of PWM controller IC1 raises, through the adjustment of PWM controller IC1 internal circuit, the dutycycle of the pulse-width signal that the 8th pin exports reduces, thus output voltage Vo is reduced, this completes the process of feedback regulation.
In like manner, when output voltage Vo because of certain reason lower than setting value time, the current potential of each point is just in time contrary higher than setting value situation with above-mentioned, and the dutycycle of the pulse-width signal that the 8th pin exports increases, thus output voltage Vo is increased, completes feedback regulation.
Power adjusting temperature control module passes through regulator potentiometer resistance thus the output voltage of by-pass cock power supply, the i.e. supply voltage of refrigerating system, make the complete machine power consumption of case lid can in 0 ~ 70W range, user can, according to the environment temperature of reality regulator potentiometer voluntarily, make the cold temperatures of refrigeration lid satisfy the demands.
Electronic cold case lid of the present utility model can also realize energy-conservation beneficial effect.
Existing electronic cold case lid and case bucket with the use of time, be all coordinate control panel program to carry out temperature control by temperature detect switch (TDS) or temperature sensor, this mode not only control principle is complicated, and energy consumption is very large.For example, the electronic cold box of a 30L, is powered by rectifier power source, and when environment temperature 32 DEG C, the temperature inside the box can reach 15 DEG C, and the temperature difference is 17 DEG C, power consumption 70W; When environment temperature 25 DEG C, the temperature inside the box is 8 DEG C, and power consumption is also 70W, in this case, as long as the temperature inside the box about 16 DEG C, can meet customer need, but temperature can not regulate, and which increases power consumption.
Efficiency eta >=83% of the AC/DC Switching Power Supply of temperature control electronic cold case lid of the present utility model, complete machine maximum power dissipation is 70W; During ECO (energy saver mode) duty, Overall Power Consumption is only 9.5W; During standby mode, Overall Power Consumption is less than 0.5W.Can meet the requirement of European Union to the energy conservation standard of household appliances product, efficiency grade can reach A++ standard.
Further, conveniently user uses, and temperature control electronic cold case lid of the present utility model both can be powered by AC/DC Switching Power Supply, also can with vehicle-mounted 12V DC storage battery power supply.Its power supply also comprises vehicle power input module and electrical source exchange module, and electrical source exchange module controls vehicle power input module and electric main input module is powered to refrigerating assembly.
Wherein, electrical source exchange module comprises relay R L1, the two ends of the coil of relay are connected to the positive and negative two ends of vehicle power input module respectively, thus be connected to positive pole (DC+) and the negative pole (DC-) of Vehicular cigarette lighter plug, and the anode of vehicle power input module is connected with the normally opened contact of relay.After vehicle-mounted cigarette lighter connects 12V DC, normally opened contact closes, namely the positive pole (DC+) of Vehicular cigarette lighter plug is connected with the positive pole (TEC+) of refrigerator, the positive pole (FAN+) of blower fan, now vehicle-mounted 12V DC is that ice chest lid is powered, and completes the switching of power supply mode.Thus achieve any switching laws of power supply two kinds of modes like this, user-friendly.
When user household, the external AC line of ice chest lid is connected civil power, Switching Power Supply exports as refrigerating assembly is powered.When user go for a ride carry time, the relay R L1 in electrical source exchange module serves switching power supply function, for user provides convenience.
With reference to Fig. 4,5, during installation, the refrigerating assembly assembled is installed to the lower casing of case lid, the lead-in wire of blower fan 1 and refrigerator is soldered on item corresponding on power panel 3, and the knob control panel of potentiometer 5 is connected on power panel by winding displacement 4.During normal work, electric main inputs from electric main access port 2.In off position, power panel 3 no-output, box cover system does not work potentiometer 5.Open potentiometer 5, system starts running, and along with potentiometer 5 knob regulates to the right, the running speed of blower fan 1 also strengthens thereupon, and the cooling power of refrigerator also strengthens thereupon.When potentiometer 5 is adjusted to MAX position, complete machine power reaches maximum, about 70W.Thus realize the object that regulating power reaches temperature control.
Temperature control electronic cold case lid of the present utility model, by increasing temperature control module, makes complete machine power adjustable in 0 ~ 70W scope, can either economize energy, is convenient to user operation again.
Above detailed description of the invention is only illustrative embodiments of the present utility model, can not be used for limiting the utility model, and protection domain of the present utility model is defined by the claims.Those skilled in the art can in essence of the present utility model and protection domain, and make various amendment or equivalent replacement to the utility model, these are revised or be equal to replacement and also should be considered as dropping in protection domain of the present utility model.
Claims (6)
1. a temperature control electronic cold case lid, comprise refrigerating assembly, it is characterized in that, also comprise the temperature control module of the output being connected to the power supply of powering for described refrigerating assembly, described temperature control module controls the output voltage of described power supply, thus the power controlling described refrigerating assembly is to carry out temperature control.
2. temperature control electronic cold case lid according to claim 1, it is characterized in that, described temperature control module comprises the first bleeder circuit, between the output that described first bleeder circuit is connected to described power supply and ground, it comprises the first resistance and potentiometer that are connected in series, and one end that described potentiometer is connected with described first resistance is also connected to the first reference voltage, other end ground connection.
3. temperature control electronic cold case lid according to claim 2, it is characterized in that, described power supply comprises electric main input module, described electric main input module comprises the PWM controller of output pulse width modulation signal, the break-make of described pulse-width signal gauge tap pipe thus convert to obtain the output voltage that DC voltage is described power supply to the alternating voltage of input; Described temperature control module also comprises voltage sampling circuit and feedback voltage stabilizing circuit, wherein,
Described voltage sampling circuit is the second bleeder circuit, and between the output that described second bleeder circuit is connected in described power supply in parallel and ground, it exports sampled voltage;
Described feedback voltage stabilizing circuit comprises photo-coupler and described PWM controller, one end of the input of described photo-coupler is connected to described sampled voltage, the other end is connected to the second reference voltage, and the output voltage of described photo-coupler is connected to the reference voltage end of described PWM controller.
4. temperature control electronic cold case lid according to claim 2, it is characterized in that, described temperature control module also comprises the triode between output and ground being connected to described power supply, the base stage of described triode by the second resistance be connected to described power supply output and by the switch ground connection of described potentiometer.
5. temperature control electronic cold case lid according to claim 3, it is characterized in that, described power supply also comprises vehicle power input module and electrical source exchange module, and described electrical source exchange module controls described vehicle power input module and described electric main input module is powered to described refrigerating assembly.
6. temperature control electronic cold case lid according to claim 5, it is characterized in that, described electrical source exchange module comprises relay, the two ends of the coil of described relay are connected to the positive and negative two ends of described vehicle power input module respectively, and the anode of described vehicle power input module is connected with the normally opened contact of described relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520127977.XU CN204513841U (en) | 2015-03-05 | 2015-03-05 | Temperature control electronic cold case lid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520127977.XU CN204513841U (en) | 2015-03-05 | 2015-03-05 | Temperature control electronic cold case lid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204513841U true CN204513841U (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520127977.XU Expired - Fee Related CN204513841U (en) | 2015-03-05 | 2015-03-05 | Temperature control electronic cold case lid |
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| Country | Link |
|---|---|
| CN (1) | CN204513841U (en) |
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2015
- 2015-03-05 CN CN201520127977.XU patent/CN204513841U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20190305 |
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| CF01 | Termination of patent right due to non-payment of annual fee |