CN2831203Y - Semiconductor refrigerator - Google Patents
Semiconductor refrigerator Download PDFInfo
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- CN2831203Y CN2831203Y CN 200520087068 CN200520087068U CN2831203Y CN 2831203 Y CN2831203 Y CN 2831203Y CN 200520087068 CN200520087068 CN 200520087068 CN 200520087068 U CN200520087068 U CN 200520087068U CN 2831203 Y CN2831203 Y CN 2831203Y
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- temperature
- comparer
- temperature sensor
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- semiconductor freezer
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 37
- 238000005057 refrigeration Methods 0.000 claims description 33
- 230000008014 freezing Effects 0.000 abstract description 6
- 238000007710 freezing Methods 0.000 abstract description 6
- 230000000052 comparative effect Effects 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model discloses a semiconductor refrigerator, particularly the improvement of a temperature controlling circuit of a semiconductor refrigerator. In the temperature controlling circuit, one path of temperature sensor is arranged in refrigerating space and the other path of temperature sensor is arranged at the cold end of a refrigerating slice. The signal output ends of the two paths of temperature sensors are respectively connected with the in-phase input end of one path of comparator. The reverse-phase input ends of the comparator are respectively provided with comparative reference voltage which is modulated in a rating mode. The output end of the comparator is connected with a PWM impulse-width modulation chip to be connected with a refrigerator through a dc voltage changer. Before the temperature of the cold end of the refrigerating slice does not reach the freezing point, the temperature controlling circuits of the utility model output a voltage signal which is continuously varied towards the refrigerator according to the difference value of a preset temperature and a measured temperature of the refrigerating space, the temperature is accurately controlled and the energy consumption is reduced. When the temperature exceeds the preset value, the temperature controlling circuits can supply protection, which can effectively prevent a semiconductor device from being damaged. The product reliability is improved.
Description
Technical field
The utility model belongs to the semiconductor freezer technical field, specifically, relates to a kind of semiconductor freezer that is used for, and refrigerating sheet cold junction temperature and refrigeration space temperature is carried out the control circuit of comprehensive adjustment.
Background technology
At present, semiconductor freezer has been subjected to consumers in general's approval and favor deeply as a kind of refrigerating equipment of energy-saving and environmental protection.Semiconductor freezer why can environmental protection, is because its special refrigeration modes decision.Semiconductor freezer abandoning tradition refrigerator adopts the drawback of freon as refrigerant, utilize two kinds of electronics and the potential variation that in power circuit, produces of hole and heat absorption, exothermic phenomenon in the conductor to form cool and heat ends, and cold junction placed in the refrigeration space, and then realize the refrigeration performance of refrigerator.In today that environmental consciousness is popularized day by day, the application places of semiconductor freezer constantly enlarges, and has related generally to family, hotel, multiple field such as vehicle-mounted, and the controller that refrigerator temperature is controlled is also had multiple way of realization.The general employing of common temperature controller compares refrigeration space temperature and design temperature, and then changes the voltage at refrigerator two ends, reaches the purpose of temperature control.Though adopt the mode of this single temperature control can solve the temperature controlled problem of refrigeration space,, when regular meeting appeared at the refrigeration space temperature and also do not reach setting value, the refrigeration end temperature had arrived freezing point.At this moment, if refrigerator works on, will cause the damage of semiconductor devices, thereby reduce reliability of products.Yet, in some semiconductor freezer, adopt the mode of refrigerator and refrigeration space and the dual thermometric of environment temperature, realize effective control to refrigerator.Sort controller circuit structure complexity, the cost height, it is big to take the pcb board space, is unfavorable for the miniaturization of equipment.
Summary of the invention
The utility model is for solving the single temperature control method of available technology adopting, product reliability is low, and adopt dual temperature control method circuit structure complexity, problem that cost is high, a kind of novel semiconductor freezer is provided, by refrigeration space temperature and refrigerating sheet cold junction temperature are gathered in real time,, realized effective control to refrigerator with simple circuit configuration, thereby reduced cost, improved reliability of products.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of semiconductor freezer comprises the multi way temperature sensor, and wherein No. one temperature sensor is arranged in the refrigeration space, and another road temperature sensor is arranged on the cold junction of refrigerating sheet; The signal output part of described two-way temperature sensor connects the in-phase input end of one road comparer separately, the inverting input of described comparer is respectively equipped with the benchmark voltage of specified modulation, the output terminal of comparer connects the PWM pulse width modulating chip, and then connects refrigerator through DC voltage converter.
As further qualification to technique scheme, described two-way temperature sensor all adopts the thermal resistance temperature sensor with negative temperature coefficient to realize, one end ground connection of thermal resistance, the other end links to each other with direct supply through divider resistance, and described thermal resistance links to each other with the in-phase input end of comparer with the tie point of divider resistance.The inverting input of described comparer connects described direct supply through another divider resistance on the other hand on the one hand through a divider resistance ground connection.In addition, also be provided with adjustable resistor in the link circuit of described refrigeration space temperature sensor, described adjustable resistor is connected the in-phase input end of described comparer with temperature sensor series connection back.
As further limiting again to technique scheme, described comparer is provided with the return difference control circuit of being made up of feedback resistance and diode, wherein, an end of feedback resistance connect comparer (output terminal, the other end connects the in-phase input end of comparer through described diode.
As the further qualification again to technique scheme, in described two comparers, one is the continuous adjustable differential computing of high precision output voltage comparer; Another is common comparer, and output voltage only has the high-low level two states.The output terminal of two comparers outputs to the input end of described PWM pulse width modulating chip respectively jointly after a diode interconnects, and then the work of control refrigerator.
Compared with prior art, advantage of the present utility model and good effect are: the utility model is by gathering in real time refrigeration space temperature and refrigerating sheet cold junction temperature, before the refrigerating sheet cold junction temperature does not arrive freezing point, according to refrigeration space design temperature and the difference of measuring temperature, output continually varying voltage signal, and then the dutycycle of control PWM chip output pulse width, realize reasonable adjusting, the purpose that reaches accurate temperature controlling and cut down the consumption of energy to refrigerator both end voltage electric current.When the refrigerating sheet cold junction temperature arrives freezing point, no matter whether the refrigeration space temperature reaches setting value, all turn-off the working power of refrigerator, control PWM pulse width modulating chip is resumed work after the temperature of temperature sensor rises to design temperature add-back difference, thereby effectively prevented the damage of semiconductor devices, improved reliability of products.
Description of drawings
Fig. 1 is the theory diagram of the utility model semiconductor freezer temperature-adjusting circuit;
Fig. 2 is the concrete line connecting relation figure of temperature-adjusting circuit among Fig. 1.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
In semiconductor freezer of the present utility model, include two temperature sensor RT1, RT2, be separately positioned in the refrigeration space and the cold junction of refrigerating sheet, the output terminal of each temperature sensor RT1, RT2 connects the in-phase input end of comparer U1, a U2 respectively, the inverting input of each comparer U1, U2 is respectively equipped with the benchmark voltage of specified modulation, the output terminal of comparer U1, U2 links to each other with DC voltage converter through the PWM pulse width modulating chip, and then the operating voltage and the electric current of control refrigerator.Its control principle block scheme is referring to shown in Figure 1.
Among Fig. 1, line voltage obtains a Rectified alternating current after filtering circuit filtering, a rectification circuit rectification, export to DC voltage converter and carry out voltage transformation, obtains one road galvanic current source VCC and provides working power to system fan.The control end of described DC voltage converter connects the pulse signal output end of PWM pulse width modulating chip, provides a transformable operating voltage and an electric current according to the dutycycle of pulse signal to semiconductor cooler, and then realizes the adjusting of refrigerating capacity.By the voltage of refrigeration space temperature sensor RT1 modulation and benchmark regulate and control voltage through comparer U1 relatively after, output continually varying regulation and control voltage is given the PWM pulse width modulating chip, and then change described PWM pulse width modulating chip output duty of ratio, by the effective adjusting of DC voltage converter realization to semiconductor cooler both end voltage and electric current, the purpose that reaches accurate temperature controlling and cut down the consumption of energy.The in-phase input end of hysteresis comparator U2 connects the modulation voltage of refrigerating sheet cold junction temperature sensor RT2, carry out return difference with the low warm spot reference value voltage of its inverting input temperature setting and control the output of closing or recovering the PWM pulse width modulating chip, and then realize real-time control the refrigerating sheet freezing point temperature.
Described refrigeration space temperature sensor RT1 can be made of a temperature detector, also can be made of more than one temperature detector; Described refrigerating sheet cold junction temperature sensor RT2 can be made of a temperature detector, also can be made of more than one temperature detector.
The concrete line connecting relation of temperature control circuit is referring to shown in Figure 2.Among Fig. 2, comparer U1, U2 can be made of independent comparer, also can be integrated in the PWM pulse width modulating chip.Comparer U1 is the continuously adjustable comparer of a high precision output voltage, has PD (ratio, integration) regulatory function; Comparer U2 is a common comparer, when its in-phase input end voltage during greater than inverting input voltage, with regard to output+12V high level, when its in-phase input end voltage during less than inverting input voltage, just export low level, and then realize switch control described PWM pulse width modulating chip near 0V.Described comparer U2 and feedback resistance R7, R8 and diode D3 constitute hysteresis comparator; when the refrigerating sheet cold junction temperature rises to design temperature add-back difference; control PWM pulse width modulating chip is resumed work, and then has effectively protected semiconductor cooler, has improved the reliability of product work.
RW is an adjustment resistance, and VCC is the D.C. regulated power supply of DC voltage converter output.Negative temperature coefficient sensor RT1 can include only a temperature detector and also can be made of more than one temperature detector, is used to detect the temperature of semiconductor freezer refrigeration space.Come stepless control PWM pulsewidth degree modulation chip output duty of ratio according to the difference of detected actual temperature and design temperature, and then on refrigerating sheet, realize variable voltage and variable current by DC voltage converter.Negative temperature coefficient sensor RT2 can include only a temperature detector and also can be made of more than one temperature detector, is used to detect the cold junction temperature of conductor refrigeration sheet.When the cold junction temperature of conductor refrigeration sheet reaches its given extreme point, comparer U2 will export a high level signal, close the output of PWM pulse width modulating chip.By the return difference value control of circuit, after conductor refrigeration sheet cold junction temperature was higher than its set point, output high level signal control PWM pulse width modulating chip was resumed work, thereby has effectively protected semiconductor cooler to avoid damaging.
The concrete course of work of described semiconductor freezer is as follows: after refrigeration space temperature sensor RT1 and external temperature regulation and control resistance R W connect, be connected the in-phase input end of comparer U1, and through divider resistance R3 connection D.C. regulated power supply VCC.The inverting input of comparer U1 is provided with 2.00V reference voltage (its value is given according to negative temperature characteristic sensor and semiconductor operating characteristic) after passing through precision resistance R1, R2 dividing potential drop.At first set refrigeration space is temperature required by outside temperature adjustment resistance R W.At the beginning, W is adjusted to maximum value with the temperature adjusting resistance R, D.C. regulated power supply VCC by temperature sensor RT1 and temperature adjusting resistance R W series connection after, receive the in-phase input end of comparer U1 with the detection voltage that obtains after the precision resistance R3 dividing potential drop.When initial, its in-phase input end voltage is less than by reference voltage 2.00V given after inverting input precision resistance R1, the R2 dividing potential drop.At this moment, comparer U1 exports a utmost point low-voltage VO, negative-feedback circuit in the PWM pulse width modulating chip obtains a pulse signal than big space rate at its output terminal, and control conductor refrigeration sheet obtains a higher operating voltage and an electric current, and then realizes the refrigeration of conductor refrigeration sheet.Reduction along with the refrigeration space temperature, the resistance of temperature sensor RT1 increases gradually, the voltage of comparer U1 in-phase input end raises gradually simultaneously, reach behind the certain value along with the output terminal that is reduced in comparer U1 of temperature will be exported a VO voltage that increases gradually, obtain one through negative-feedback circuit at the control end of DC voltage converter and change continuously and pwm pulse signal that dutycycle reduces gradually.Therefore, obtain an operating voltage that reduces gradually and electric current,, maintain the insulation voltage status up to reaching equilibrium point at the two ends of refrigerator.
When adjusting temperature adjusting resistance R W change temperature is provided with (during low temperature), the voltage that the in-phase input end of comparer U1 detects will be lower than by 2.00V voltage given after end of oppisite phase precision resistance R1, the R2 dividing potential drop.At this moment, the course of work will repeat above-mentioned regulating step.Therefore, the resistance of adjusting resistance R W can realize the real-time control to the refrigeration space temperature.
Temperature sensor RT2 is used to detect the temperature of refrigerating sheet cold junction, its by with precision resistance R6 dividing potential drop after be connected to the in-phase input end of comparer U2, in the given extreme value temperature reference voltages 3.65V of inverting input of comparer U2, i.e. freezing point temperature value (its value can be given by temperature sensor and semiconductor operating characteristic).In the refrigerator refrigeration processes, temperature continues to descend, and the resistance of temperature sensor RT2 will increase gradually.When temperature drops to extreme point; the resistance value maximum of temperature sensor RT2; at this moment; the in-phase input end voltage of comparer U2 is the highest; when its voltage during, comparer U2 output+12V high level, close the pulse output of PWM pulse width modulating chip greater than given reference voltage 3.65V; refrigerator is quit work, realize the protection purpose.
Described comparer U2 is provided with a return difference control circuit, is formed by connecting by feedback resistance R7, R8 and diode D3.Wherein, feedback resistance R7 directly is connected between the output terminal and in-phase input end of comparer U2, is connected between the output terminal and in-phase input end of described comparer U2 after feedback resistance R8 and the diode D3 series connection.The in-phase input end voltage of comparer U2 is along with refrigerating sheet cold junction sensor RT2 variation of temperature can very fast reduction; start the PWM pulse width modulating chip once more; but after the temperature of temperature sensor RT2 rises to design temperature add-back difference; output approaches the low level signal of 0V; control PWM pulse width modulating chip is resumed work; thereby effectively protected semiconductor cooler, improved the reliability of product work.
The above-mentioned simple circuit configuration that adopts the utility model has realized the real-time regulated to semiconductor freezer refrigeration space temperature and refrigerating sheet cold junction temperature, has reached the multipurpose of energy-saving and cost-reducing and protection device.Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection domain of the present utility model.
Claims (9)
1. a semiconductor freezer comprises the multi way temperature sensor, and wherein No. one temperature sensor (RT1) is arranged in the refrigeration space, and another road temperature sensor (RT2) is arranged on the cold junction of refrigerating sheet; It is characterized in that: the signal output part of described two-way temperature sensor (RT1, RT2) connects the in-phase input end of one road comparer (U1, U2) separately, the inverting input of described comparer (U1, U2) is respectively equipped with the benchmark voltage of specified modulation, the output terminal of comparer (U1, U2) connects the PWM pulse width modulating chip, and then connects refrigerator through DC voltage converter.
2. semiconductor freezer according to claim 1, it is characterized in that: described temperature sensor (RT1, RT2) adopts thermal resistance temperature sensor to realize, one end ground connection of thermal resistance (RT1, RT2), the other end links to each other with direct supply (VCC) through divider resistance (R3 or R5), and described thermal resistance (RT1, RT2) links to each other with the in-phase input end of comparer (U1, U2) with the tie point of divider resistance (R3 or R5).
3. semiconductor freezer according to claim 2 is characterized in that: the inverting input of described comparer (U1, U2) connects described direct supply through another divider resistance (R2 or R6) on the other hand on the one hand through a divider resistance (R1 or R4) ground connection.
4. semiconductor freezer according to claim 3 is characterized in that: described refrigeration space temperature sensor (RT1) is connected the in-phase input end of described comparer (U1) with an adjustable resistance (RW1) series connection back.
5. semiconductor freezer according to claim 3, it is characterized in that: described comparer (U2) is provided with a return difference control circuit, in described return difference control circuit, one end of feedback resistance (R8) connects the output terminal of comparer (U2), and the other end connects the in-phase input end of described comparer (U2) through a diode (D3).
6. semiconductor freezer according to claim 3 is characterized in that: the output terminal of described two comparers (U1, U2) outputs to the input end of described PWM pulse width modulating chip respectively jointly after a diode (D1, D2) interconnects.
7. semiconductor freezer according to claim 6 is characterized in that: described comparer (U1) is the continuous adjustable differential computing of a high precision output voltage comparer.
8. semiconductor freezer according to claim 6 is characterized in that: described comparer (U2) is a common comparer, and output voltage only has the high-low level two states.
9. semiconductor freezer according to claim 2 is characterized in that: described temperature sensor (RT1, RT2) all adopts the thermal resistance temperature sensor of negative temperature coefficient to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520087068 CN2831203Y (en) | 2005-09-10 | 2005-09-10 | Semiconductor refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520087068 CN2831203Y (en) | 2005-09-10 | 2005-09-10 | Semiconductor refrigerator |
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| Publication Number | Publication Date |
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| CN2831203Y true CN2831203Y (en) | 2006-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200520087068 Expired - Lifetime CN2831203Y (en) | 2005-09-10 | 2005-09-10 | Semiconductor refrigerator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014101614A1 (en) * | 2012-12-26 | 2014-07-03 | 宁波婷微电子科技有限公司 | Temperature-controlled semiconductor refrigeration apparatus |
| CN105180350A (en) * | 2015-08-05 | 2015-12-23 | 广东美的制冷设备有限公司 | Heat dissipation control method and heat dissipation device for frequency conversion air conditioner |
| CN109323482A (en) * | 2018-10-24 | 2019-02-12 | 中国石油天然气集团有限公司 | Semiconductor cooler and its refrigeration control method |
| CN111213018A (en) * | 2017-10-11 | 2020-05-29 | 菲力尔商业系统公司 | Refrigerator controller system and method |
| WO2022105851A1 (en) * | 2020-11-19 | 2022-05-27 | 多美达瑞典有限公司 | Control circuit for thermoelectric refrigeration refrigerator, and method |
| CN114739076A (en) * | 2021-01-07 | 2022-07-12 | 贵州海尔电器有限公司 | Semiconductor refrigeration equipment and control method thereof |
| USD1026969S1 (en) | 2020-08-31 | 2024-05-14 | Dometic Sweden Ab | Refrigerator |
-
2005
- 2005-09-10 CN CN 200520087068 patent/CN2831203Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014101614A1 (en) * | 2012-12-26 | 2014-07-03 | 宁波婷微电子科技有限公司 | Temperature-controlled semiconductor refrigeration apparatus |
| CN105180350A (en) * | 2015-08-05 | 2015-12-23 | 广东美的制冷设备有限公司 | Heat dissipation control method and heat dissipation device for frequency conversion air conditioner |
| CN105180350B (en) * | 2015-08-05 | 2018-02-02 | 广东美的制冷设备有限公司 | The cooling control method and heat abstractor of transducer air conditioning |
| CN111213018A (en) * | 2017-10-11 | 2020-05-29 | 菲力尔商业系统公司 | Refrigerator controller system and method |
| CN111213018B (en) * | 2017-10-11 | 2022-07-15 | 泰立戴恩菲力尔商业系统公司 | Refrigerator controller system and method |
| CN109323482A (en) * | 2018-10-24 | 2019-02-12 | 中国石油天然气集团有限公司 | Semiconductor cooler and its refrigeration control method |
| CN109323482B (en) * | 2018-10-24 | 2020-08-11 | 中国石油天然气集团有限公司 | Semiconductor refrigerator and refrigeration control method thereof |
| USD1026969S1 (en) | 2020-08-31 | 2024-05-14 | Dometic Sweden Ab | Refrigerator |
| WO2022105851A1 (en) * | 2020-11-19 | 2022-05-27 | 多美达瑞典有限公司 | Control circuit for thermoelectric refrigeration refrigerator, and method |
| CN114739076A (en) * | 2021-01-07 | 2022-07-12 | 贵州海尔电器有限公司 | Semiconductor refrigeration equipment and control method thereof |
| CN114739076B (en) * | 2021-01-07 | 2023-07-14 | 贵州海尔电器有限公司 | Semiconductor refrigeration equipment and control method thereof |
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| EXPY | Termination of patent right or utility model |