CN201255841Y - Switch box for temperature double limit air-conditioner operation - Google Patents
Switch box for temperature double limit air-conditioner operation Download PDFInfo
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- CN201255841Y CN201255841Y CNU2008200275470U CN200820027547U CN201255841Y CN 201255841 Y CN201255841 Y CN 201255841Y CN U2008200275470 U CNU2008200275470 U CN U2008200275470U CN 200820027547 U CN200820027547 U CN 200820027547U CN 201255841 Y CN201255841 Y CN 201255841Y
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Abstract
The utility model discloses a switch box for controlling air conditioners via two temperature limits, comprising a shell in which a voltage reduction rectifier circuit, a temperature signal detection circuit and a switch circuit are provided, wherein the voltage reduction rectifier is connected with the temperature signal detection circuit and the switch circuit, and the temperature signal detection circuit is connected with the switch circuit. The switch box is mainly used for control air conditioners, which can automatically break power supply when the air conditioning room temperature at summer decreases under 25DEG C and the air conditioning room temperature at winter increases above 20DEG C, to stop the power supply of air conditioners, thereby saving electricity.
Description
Technical field
The utility model relates to a kind of temperature detect switch (TDS), particularly a kind of switch with temperature control operation of air-conditioner.
Background technology
Along with development and national economy, people's living standard improves constantly, and uses air conditioner more and more, and for saves energy, people set the air-conditioning indoor temperature in summer and are not less than 25 ℃ usually, and when being lower than 25 ℃, air conditioner stops refrigerating operaton automatically; Set the air-conditioning indoor temperature winter and be not higher than 20 ℃, when being higher than 20 ℃, air conditioner stops heating operation automatically.In some public collective occasions, as: office, school, the market, factories and miness, enterprise, hospital, hotel or the like, some people's saving consciousnesses are not strong, set the air-conditioning indoor temperature arbitrarily, even summer, indoor temperature was lower than 25 ℃, winter, indoor temperature was higher than 20 ℃, still make operation of air-conditioner, this not only wastes electric energy, also unfavorable to person health simultaneously, people nasal obstruction can occur if work life for a long time under air conditioner surroundings, dizzy, sneeze, tinnitus, weak, symptom such as failure of memory and some are allergic, these phenomenons are referred to as " air conditioner comprehensive disease " or " air conditioner disease " on modern medicine.Medical evidence air-conditioning indoor and outdoors natural temperature difference is difficult for excessive, is advisable to be no more than 5 ℃.Therefore must adopt compulsive measures in above-mentioned those collective's occasions: when winter, the air-conditioning indoor temperature was higher than 20 ℃, make air conditioner out of service automatically when the air-conditioning indoor temperature is lower than 25 ℃ summer.This has not only saved electric energy, and is also favourable to health.Imagine an air-conditioned room one day and save 1 degree electricity, the summer in winter in 1 year has seven months machine of turning on the aircondition, it is electric just can to save 210 degree in 1 year, and it is desirable that this is undoubtedly the leaders of unit such as those offices, school, market, factories and miness, enterprise, hospital, hotel.The imagination whole nation has 2,000 ten thousand air-conditioned rooms not move in 20 ℃～25 ℃ scopes, 4,200,000,000 degree that just can totally economize on electricity, and more than 400 ten thousand tons of GHG emissions mitigation on the energy-conserving and environment-protective meaning, are that country, society are desired.
The utility model content
The utility model provides the switch enclosure of the two limit control of a kind of temperature operation of air-conditioner, the air conditioner attaching plug is inserted on this switch enclosure, switch enclosure stops to be the air conditioner power supply in a certain temperature range, is the air conditioner power supply when temperature is higher than or be lower than the aforementioned temperature scope at once.
The utility model is that the technical solution that adopts that achieves the above object is:
The switch enclosure of the two limit control of temperature operation of air-conditioner comprises shell, be provided with step-down rectifying circuit, temperature signal testing circuit and on-off circuit in the enclosure, step-down rectifying circuit is connected with temperature signal testing circuit and on-off circuit, and the temperature signal testing circuit is connected with on-off circuit.
The said temperature signal deteching circuit comprises: integrated circuit 556, triode Q1, diode D1, D2, resistance R 3, R4, integrated circuit 556 pins 5 connect the anode of diode D1, the negative electrode of diode D1 is connected with the negative electrode of diode D2, integrated circuit 556 pins 9 connect the base stage of triode Q1 by resistance R 3, and the collector of triode Q1 is the anode of connecting resistance R4 and diode D2 respectively.
The said temperature signal deteching circuit also comprises: resistance R 1, R2, negative tempperature coefficient thermistor Rt1, Rt2, common point after resistance R 1 and the thermistor Rt1 series connection is connected with the pin 6 of integrated circuit 556, and resistance R 2 is connected with the pin 8 of integrated circuit 556 with common point after thermistor Rt2 connects.
The selection of above-mentioned resistance R 1, R2, negative tempperature coefficient thermistor Rt1, Rt2 meets following relationship, thermistor Rt1, Rt2 specifications and models are identical, the resistance of thermistor Rt1, Rt2 is 1/2 of a resistance R 1 in limited time on the control temperature, is 1/2 of resistance R 2 in the following resistance of thermistor Rt1, Rt2 in limited time of controlling temperature.
Above-mentioned resistance R t1, Rt2 are contained in and also use the epoxy resin embedding in the same copper pipe.
Above-mentioned step-down rectifying circuit comprises: transformer, rectifier bridge, electrochemical capacitor C3 and voltage stabilizing diode DW, two termination 220V alternating currents of transformer primary coil, the two ends of transformer secondary coil are connected with two interchange ends of rectifier bridge respectively, the positive terminal of rectifier bridge is connected with the pin two, 4,10,12,14 of resistance R 1, R2, R4, integrated circuit 556 respectively, the positive terminal of rectifier bridge also is connected with the positive terminal of electrochemical capacitor C3, the cathode terminal of voltage stabilizing diode DW respectively, the negative pole end ground connection of electrochemical capacitor C3, the anode tap ground connection of voltage stabilizing diode DW.
Above-mentioned step-down rectifying circuit comprises: capacitor C 4, rectifier bridge, electrochemical capacitor C3 and voltage stabilizing diode DW, the live wire end L of one termination 220V alternating current of capacitor C 4, one of capacitor C 4 another termination rectifier bridges exchanges end, another of rectifier bridge exchanges the zero line side N of termination 220 alternating currents, the positive terminal of rectifier bridge respectively with resistance R 1, R2, R4, the pin two of integrated circuit 556,4,10,12,14 connect, the positive terminal of rectifier bridge also respectively with the positive terminal of electrochemical capacitor C3, the cathode terminal of voltage stabilizing diode DW connects, the negative pole end ground connection of electrochemical capacitor C3, the anode tap ground connection of voltage stabilizing diode DW.
Said switching circuit comprises: resistance R 5, unidirectional controllable silicon S CR1, relay J and socket CF, resistance R 5 one terminating diode D2 negative electrodes, other end order is to the control utmost point G of controllable silicon SCR 1, the anode A of unidirectional controllable silicon S CR1 connects the positive terminal of rectifier bridge, negative electrode K succeeds an end of electrical equipment J coil, the other end ground connection of relay J coil, the live wire end L of one termination 220V alternating current of the normally open contact of relay J, the L1 end of the other end combination hub CF of normally open contact, the zero line side N of the N1 termination 220V alternating current of socket CF, the earth terminal of socket CF is connected with the electric system ground wire.
Said switching circuit comprises: resistance R 5, bidirectional triode thyristor SCR2 and socket CF, resistance R 5 one terminating diode D2 negative electrodes, the control utmost point G of another termination bidirectional triode thyristor SCR2, the live wire end L of anode A 2 terminations 220 alternating currents of bidirectional triode thyristor SCR2, the L1 end of the anode A 1 termination socket CF of SCR2.
The positive terminal of above-mentioned rectifier bridge is connected with resistance R 6, the anode of the other end sending and receiving optical diode D3 of resistance R 6, and light emitting diode D3 plus earth, resistance R 7 extremely goes up with the L1, the N1 that are connected in parallel on socket CF after light emitting diode D4 connects.
The beneficial effects of the utility model: integrated circuit 556 contains two identical time base circuits 555, negative tempperature coefficient thermistor Rt1, Rt2 by selecting proper ratio and resistance R 1, R2, can make the ceiling temperature of switch enclosure outage is 25 ℃, the lower limit temperature of outage is 20 ℃, and then good realization air conditioner is being worked below 20 ℃, working more than 25 ℃, in 20 ℃～25 ℃ scopes, do not working.The realization of this function, huge to the energy-saving and emission-reduction meaning.
Description of drawings
Fig. 1 is the circuit connection diagram of the utility model embodiment 1;
Fig. 2 is the circuit connection diagram of the utility model embodiment 2.
Below in conjunction with accompanying drawing the utility model is elaborated:
Embodiment
Embodiment 1
In conjunction with Fig. 1, this kind circuit structure adopts the power on/off of relay J control socket CF, is fit to the air conditioner of control larger capacity.The switch enclosure of the two limit control of temperature operation of air-conditioner comprises shell, be provided with step-down rectifying circuit, temperature signal testing circuit and on-off circuit in the enclosure, step-down rectifying circuit is connected with temperature signal testing circuit and on-off circuit, and the temperature signal testing circuit is connected with on-off circuit.
The temperature signal testing circuit comprises: integrated circuit 556, triode Q1, diode D1, D2, resistance R 1, R2, R3, R4, capacitor C 1, C2 and negative tempperature coefficient thermistor Rt1, Rt2.Integrated circuit 556 pins 5 connect the anode of diode D1, and the negative electrode of diode D1 is connected with the negative electrode of diode D2, and integrated circuit 556 pins 9 connect the base stage of triode Q1 by resistance R 3, and the collector of triode Q1 is the anode of connecting resistance R4 and diode D2 respectively.The pin 3 of one termination integrated circuit 556 of capacitor C 1, the other end ground connection of capacitor C 1, the pin one 1 of a termination integrated circuit 556 of capacitor C 2, the other end ground connection of capacitor C 2.Pin 7 ground connection of integrated circuit 556.
Common point after resistance R 1 and the thermistor Rt1 series connection is connected the other end ground connection of thermistor Rt1 with the pin 6 of integrated circuit 556; Common point after resistance R 2 and the thermistor Rt2 series connection is connected the other end ground connection of thermistor Rt2 with the pin 8 of integrated circuit 556.Thermistor Rt1, Rt2 are contained in the same copper pipe and use the epoxy resin embedding.
Step-down rectifying circuit comprises: transformer T, rectifier bridge CZ, electrochemical capacitor C3 and voltage stabilizing diode DW.Two termination 220V alternating currents of transformer primary coil, the two ends of transformer secondary coil are connected with two interchange ends of rectifier bridge CZ respectively, the positive terminal of rectifier bridge CZ is connected with the pin two, 4,10,12,14 of resistance R 1, R2, R4, integrated circuit 556 respectively, the positive terminal of rectifier bridge also is connected with the positive terminal of electrochemical capacitor C3, the cathode terminal of voltage stabilizing diode DW respectively, the negative pole end ground connection of electrochemical capacitor C3, the anode tap ground connection of voltage stabilizing diode DW.The positive terminal of rectifier bridge CZ is connected with resistance R 6, the anode of another termination red light emitting diodes D3 of resistance R 6, red light emitting diodes D3 plus earth.Resistance R 7 extremely goes up with the L1, the N1 that are connected in parallel on socket CF after green LED D4 connects.
On-off circuit comprises: resistance R 5, unidirectional controllable silicon S CR1, relay J and socket CF.Resistance R 5 one terminating diode D2 negative electrodes, other end order is to the control utmost point G of controllable silicon SCR 1, the anode A of unidirectional controllable silicon S CR1 connects the positive terminal of rectifier bridge CZ, negative electrode K succeeds an end of electrical equipment J coil, the other end ground connection of relay J coil, the live wire end L of the normally open contact one termination 220V alternating current of relay J, the L1 end of the other end combination hub CF of normally open contact, the zero line side N of the N1 termination 220V alternating current of socket CF, the earth terminal of socket CF is connected with the electric system ground wire.
The alternating current of 220V after transformer T step-down rectifier bridge CZ rectification, the positive terminal output dc voltage of its rectifier bridge CZ, after capacitor C 3 filtering, voltage stabilizing diode DW voltage stabilizing as the power supply VCC of integrated circuit 556.Resistance R 1 is selected 20K Ω, resistance R 2 is selected 25K Ω, resistance R t1, Rt2 are two thermistors with negative temperature coefficient same model, nominal resistance in the time of its 25 ℃ is 10K Ω, it is 1/2 of resistance R 1 resistance, Rt1, Rt2 resistance value increase when temperature reduces, and resistance is 12.5K Ω in the time of 20 ℃, is 1/2 of resistance R 2 resistances.Integrated circuit 556 contains two identical time base circuits 555, and 6 (8) pins of integrated circuit 556 are the set end, when the voltage of this end is lower than VCC/3, can make trigger set, 5 (9) pins output high level (V ≈ VCC); 2 (12) pins are the threshold voltage end, and its threshold voltage is 2VCC/3, and when the voltage of this end during greater than 2VCC/3, and 6 (8) pin voltage can make trigger reset, 5 (9) pin output low levels when being higher than VCC/3.2 (12) pins of integrated circuit 556 directly are connected on the VCC power supply, and therefore 2 (12) pin above earth potentials are all the time all greater than 2VCC/3.
Plug insertion socket CF with air conditioner, when the air conditioner indoor temperature is higher than 25 ℃, thermistor Rt1, Rt2 value all are less than 10K Ω, 6 pin voltage are that Rt1VCC/ (20K+Rt1) is lower than VCC/3,8 pin voltage are that Rt2VCC/ (25K+Rt2) also is lower than VCC/3,5,9 pins are all exported high level, and 5 pin voltage make its conducting through diode D1 and resistance R 5 triggering unidirectional controllable silicon S CR1; 9 pin voltage are added on the base stage of triode Q1 by resistance R 3, after triode Q1 is anti-phase, triode Q1 collector is output as low level, be that diode D2 anode is a low level, negative electrode is a high level, and diode D2 ends, unidirectional controllable silicon S CR1 this moment conducting under Rt1 control, the relay J coil electricity, the normally open contact J closure of relay J, socket CF energising.
When the air conditioner indoor temperature is lower than 25 ℃, but when being higher than 20 ℃, thermistor Rt1, Rt2 value all increase, all greater than 10K Ω, but less than 12.5K Ω, this moment, 6 pin voltage were greater than VCC/3, because of 2 pin voltage greater than 2VCC/3, so 5 pin output low levels, but 8 pin voltage still are lower than VCC/3,9 pins are still exported high level, and triode Q1 current collection is low level very, and this moment, diode D2 two ends all were low levels.Unidirectional controllable silicon S CR1 Triggerless, SCR1 ends, the relay J coil blackout, the normally open contact J of relay J disconnects, socket CF outage.
When the air conditioner indoor temperature was lower than 20 ℃, Rt1, Rt2 be greater than 12.5K Ω, 6 pin voltage be Rt1VCC/ (20K+Rt1) greater than VCC/3,2 pins are greater than 2VCC/3, therefore 5 pin output low level still; 8 pin voltage are that Rt2VCC/ (25K+Rt2) is greater than VCC/3, this moment, 12 pin voltage were greater than 2VCC/3, so 9 pin output low levels, triode Q1 current collection is high level very, diode D2 conducting, unidirectional controllable silicon S CR1 this moment conducting under Rt2 control, relay J coil electricity, the normally open contact J closure of relay J, socket CF energising.
By last surface analysis as can be known, this switch enclosure is energising below 20 ℃ in the air conditioner indoor temperature, in energising more than 25 ℃, in 20 ℃～25 ℃ scopes, cut off the power supply, the air conditioner that is inserted on this switch enclosure socket CF is being worked below 20 ℃, working more than 25 ℃, in 20 ℃～25 ℃ scopes, do not work, 25 ℃ of the ceiling temperatures of the big I change switch enclosure outage of change resistance R 1,20 ℃ of the lower limit temperatures of the big I change switch enclosure outage of change resistance R 2, thus the temperature range that switch enclosure cuts off the power supply changed.
Light emitting diode D3 glows during work, is the switch enclosure relay indicating light, and after switch enclosure connect AC power, red light emitting diodes D3 was energized.Green light during light emitting diode D4 work is a switch enclosure socket CF electromotion pilot lamp, and during socket CF energising, green LED D4 is energized.
The shell of switch enclosure is made with PC alloy engineering plastics, and relay and all electronic components are contained on the printed-wiring board (PWB), and transformer and printed-wiring board (PWB) are contained in the switch enclosure; The thermistor Rt1Rt2 of two same models connects altogether in the circuit, be contained in the same copper pipe, draw three lines and seal filling with epoxy resin, one end of copper pipe dress thermistor goes out from switch enclosure plastic housing aperture part omitted micro stretching, because of the electronic component heating raises environment temperature thermistor is exerted an influence when avoiding switch enclosure work.
Because the electronic component volume is very little, the size of switch enclosure is more bigger than common power socket.Single-phase three pole socket CF and the extension line that has single-phase three-terminal polarized plus plug are housed on the switch enclosure, earlier single-phase three-terminal polarized plus plug are inserted on the indoor single phase poaer supply socket during use, the air conditioner attaching plug is inserted on the socket CF of this switch enclosure again.
Embodiment 2
In conjunction with Fig. 2, this kind circuit structure adopts the power on/off of SCR control socket CF, is fit to the air conditioner of control than low capacity.Part identical with embodiment 1 circuit structure in this circuit is not just stated superfluous, only its on-off circuit and step-down rectifying circuit is partly elaborated:
On-off circuit comprises: resistance R 5, bidirectional triode thyristor SCR2 and socket CF, resistance R 5 one terminating diode D2 negative electrodes, the control utmost point G of another termination bidirectional triode thyristor SCR2, the live wire end L of anode A 2 terminations 220 alternating currents of bidirectional triode thyristor SCR2, the L1 end of the anode A 1 termination socket CF of SCR2.
Step-down rectifying circuit comprises: capacitor C 4, rectifier bridge CZ, and the live wire end L of a termination 220V alternating current of capacitor C 4, one of capacitor C 4 another termination rectifier bridges exchanges end, and another of rectifier bridge exchanges the zero line side N of termination 220 alternating currents.
Signal controlling bidirectional triode thyristor SCR2 on the resistance R 5 makes the SCR2 conducting or closes directly gauge tap box socket CF energising or outage.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also be not limited in above-mentioned for example, 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 the protection domain of utility model.
Claims (10)
1, the switch enclosure of the two limit control of temperature operation of air-conditioner comprises shell, it is characterized in that: be provided with step-down rectifying circuit, temperature signal testing circuit and on-off circuit in the described shell, step-down rectifying circuit is connected with temperature signal testing circuit and on-off circuit, and the temperature signal testing circuit is connected with on-off circuit.
2, the switch enclosure of the two limit control of temperature according to claim 1 operation of air-conditioner, it is characterized in that: described temperature signal testing circuit comprises: integrated circuit 556, triode (Q1), diode (D1), (D2), resistance (R3), (R4), integrated circuit 556 pins 5 connect the anode of diode (D1), the negative electrode of diode (D1) is connected with the negative electrode of diode (D2), integrated circuit 556 pins 9 connect the base stage of triode (Q1) by resistance (R3), and the collector of triode (Q1) is the anode of connecting resistance (R4) and diode (D2) respectively.
3, the switch enclosure of the two limit control of temperature according to claim 2 operation of air-conditioner, it is characterized in that: described temperature signal testing circuit also comprises: resistance (R1), (R2), negative tempperature coefficient thermistor (Rt1), (Rt2), common point after the series connection of resistance (R1) and thermistor (Rt1) is connected with the pin 6 of integrated circuit 556, and resistance (R2) is connected with the pin 8 of integrated circuit 556 with common point after thermistor (Rt2) is connected.
4, the switch enclosure of the two limit control of temperature according to claim 3 operation of air-conditioner, it is characterized in that: the selection of described resistance (R1), (R2), negative tempperature coefficient thermistor (Rt1), (Rt2) meets following relationship, thermistor (Rt1), (Rt2) specifications and models are identical, the resistance of thermistor (Rt1), (Rt2) is 1/2 of a resistance (R1) in limited time on the control temperature, is 1/2 of resistance (R2) in the following resistance of thermistor (Rt1), (Rt2) in limited time of controlling temperature.
5, according to the switch enclosure of claim 3 or the two limit control of 4 described temperature operation of air-conditioner, it is characterized in that: described resistance (Rt1), (Rt2) are contained in and also use the epoxy resin embedding in the same copper pipe.
6, switch enclosure according to claim 1 or the two limit control of 3 described temperature operation of air-conditioner, it is characterized in that: described step-down rectifying circuit comprises: transformer, rectifier bridge, electrochemical capacitor (C3) and voltage stabilizing diode (DW), two termination 220V alternating currents of transformer primary coil, the two ends of transformer secondary coil are connected with two interchange ends of rectifier bridge respectively, the positive terminal of rectifier bridge respectively with resistance (R1), (R2), (R4), the pin two of integrated circuit 556,4,10,12,14 connect, the positive terminal of rectifier bridge also respectively with the positive terminal of electrochemical capacitor (C3), the cathode terminal of voltage stabilizing diode (DW) connects, the negative pole end ground connection of electrochemical capacitor (C3), the anode tap ground connection of voltage stabilizing diode (DW).
7, switch enclosure according to claim 1 or the two limit control of 3 described temperature operation of air-conditioner, it is characterized in that: described step-down rectifying circuit comprises: electric capacity (C4), rectifier bridge, electrochemical capacitor (C3) and voltage stabilizing diode (DW), the live wire end L of one termination 220V alternating current of electric capacity (C4), one of another termination rectifier bridge of electric capacity (C4) exchanges end, another of rectifier bridge exchanges the zero line side N of termination 220 alternating currents, the positive terminal of rectifier bridge respectively with resistance (R1), (R2), (R4), the pin two of integrated circuit 556,4,10,12,14 connect, the positive terminal of rectifier bridge also respectively with the positive terminal of electrochemical capacitor (C3), the cathode terminal of voltage stabilizing diode (DW) connects, the negative pole end ground connection of electrochemical capacitor (C3), the anode tap ground connection of voltage stabilizing diode (DW).
8, the switch enclosure of the two limit control of temperature according to claim 6 operation of air-conditioner, it is characterized in that: described on-off circuit comprises: resistance (R5), one-way SCR (SCR1), relay (J) and socket (CF), resistance (R5) terminating diode (D2) negative electrode, other end order is to the control utmost point (G) of controllable silicon (SCR1), the anode (A) of one-way SCR (SCR1) connects the positive terminal of rectifier bridge, negative electrode (K) is succeeded an end of electrical equipment (J) coil, the other end ground connection of relay (J) coil, the live wire end L of one termination 220V alternating current of the normally open contact of relay (J), the L1 end of the other end combination hub (CF) of normally open contact, the zero line side N of the N1 termination 220V alternating current of socket (CF), the earth terminal of socket (CF) is connected with the electric system ground wire.
9, the switch enclosure of the two limit control of temperature according to claim 7 operation of air-conditioner, it is characterized in that: described on-off circuit comprises: resistance (R5), bidirectional triode thyristor (SCR2) and socket (CF), resistance (R5) terminating diode (D2) negative electrode, the control utmost point (G) of another termination bidirectional triode thyristor (SCR2), the live wire end L of anode (A2) termination 220 alternating currents of bidirectional triode thyristor (SCR2), the L1 end of anode (SCR2) (A1) termination socket (CF).
10, the switch enclosure of the two limit control of temperature according to claim 9 operation of air-conditioner, it is characterized in that: the positive terminal of described rectifier bridge is connected with resistance (R6), the anode of the other end sending and receiving optical diode (D3) of resistance (R6), light emitting diode (D3) plus earth, resistance (R7) is extremely gone up with the L1, the N1 that are connected in parallel on socket (CF) after light emitting diode (D4) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200275470U CN201255841Y (en) | 2008-09-03 | 2008-09-03 | Switch box for temperature double limit air-conditioner operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200275470U CN201255841Y (en) | 2008-09-03 | 2008-09-03 | Switch box for temperature double limit air-conditioner operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201255841Y true CN201255841Y (en) | 2009-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200275470U Expired - Fee Related CN201255841Y (en) | 2008-09-03 | 2008-09-03 | Switch box for temperature double limit air-conditioner operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201255841Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107653636A (en) * | 2017-11-13 | 2018-02-02 | 惠州市蓝微电子有限公司 | A kind of inexpensive washing machine control system |
-
2008
- 2008-09-03 CN CNU2008200275470U patent/CN201255841Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107653636A (en) * | 2017-11-13 | 2018-02-02 | 惠州市蓝微电子有限公司 | A kind of inexpensive washing machine control system |
| CN107653636B (en) * | 2017-11-13 | 2020-07-24 | 惠州市蓝微电子有限公司 | Power supply control system of washing machine |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090610 Termination date: 20100903 |