CN203908197U - Safe refrigerator control circuit - Google Patents
Safe refrigerator control circuit Download PDFInfo
- Publication number
- CN203908197U CN203908197U CN201420343281.6U CN201420343281U CN203908197U CN 203908197 U CN203908197 U CN 203908197U CN 201420343281 U CN201420343281 U CN 201420343281U CN 203908197 U CN203908197 U CN 203908197U
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- circuit
- temperature
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- thermistor
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Abstract
The utility model discloses a safe refrigerator control circuit which is used for controlling connection and disconnection between a refrigerator compressor and a power circuit. The control circuit comprises a temperature collection circuit, a reference temperature circuit, a temperature comparison circuit and an output switch circuit, wherein the temperature collection circuit is used for detecting the temperature of the refrigerator compressor and outputting a detection voltage signal; the reference temperature circuit is used for outputting a reference voltage signal; the temperature comparison circuit is connected with the temperature collection circuit and the reference temperature circuit and used for comparing the detection voltage signal output by the temperature collection circuit and a reference voltage signal output by a reference temperature circuit and outputting a control signal; and the output switch circuit connected with the temperature comparison circuit is used for controlling connection and disconnection between the refrigerator compressor and the power circuit according to the control signal output by the temperature comparison circuit. According to the safe refrigerator control circuit, the refrigerator compressor can be turned off at the high temperature, the service life of the refrigerator compressor is prolonged, the maintenance cost is reduced, and the safety performance is improved.
Description
Technical field
The utility model relates to refrigerator technical field, more particularly, and particularly a kind of safety-type refrigerator control circuit.
Background technology
Along with the continuous lifting of people's living standard, refrigerator is widely used in the field such as family, commercial and industrial, existing refrigerator is in use always in opening, because the compressor in refrigerator works long hours, will produce a large amount of heats, can have influence on the one hand the service life of compressor, improve the maintenance cost of refrigerator, on the other hand may initiation fire in heat larger summer, there is larger generation potential safety hazard.Therefore, be necessary to design a kind of novel refrigerator control circuit, the operation that this control circuit can be controlled compressor according to the temperature of compressor extends compressor service life to reach, reduce maintenance cost and improve the object of security performance.
Utility model content
The purpose of this utility model is to provide a kind of can extend compressor service life, reduce maintenance cost and improve the safety-type refrigerator control circuit of security performance.
In order to achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of safety-type refrigerator control circuit, for controlling conducting and the shutoff between freezer compressor and power circuit, this control circuit comprises,
Temperature collection circuit, for detection of freezer compressor temperature, and exports a detectable voltage signals;
Fiducial temperature circuit, for exporting a reference voltage signal;
The temperature comparison circuit being connected with temperature collection circuit and fiducial temperature circuit, for the detectable voltage signals of C.T Acquisition Circuit output and the reference voltage signal of fiducial temperature circuit output, and output and control signal;
And the output switch circuit being connected with temperature comparison circuit, for conducting and shutoff between control signal control freezer compressor and the power circuit exported according to temperature comparison circuit.
Preferably, described temperature collection circuit comprises the first resistance and first thermistor of mutual series connection, one end of described the first resistance is connected with power supply vcc, one end ground connection of described the first thermistor, and the link of described the first resistance and the first thermistor is connected with temperature comparison circuit.
Preferably, described fiducial temperature circuit comprises the second resistance and second thermistor of mutual series connection, one end of described the second resistance is connected with power supply vcc, one end ground connection of described the second thermistor, and the link of described the second resistance and the second thermistor is connected with temperature comparison circuit.
Preferably, described temperature comparison circuit comprises operational amplifier and the 3rd resistance, the reversed-phase output of described operational amplifier is connected with the output of fiducial temperature circuit, its in-phase output end is connected with the output of temperature collection circuit, its output is connected with the input of output switch circuit, and described the 3rd resistance is also connected between power supply vcc and the output of operational amplifier.
Preferably, described output switch circuit comprises triode and relay, the base stage of described triode is connected with the output of temperature comparison circuit, its colelctor electrode is connected with power supply vcc by the main coil of relay, its grounded emitter, and the main contacts two ends of described relay are connected with freezer compressor and power circuit respectively.
Compared with prior art, the utility model has the advantage of: the utility model carrys out by temperature comparison circuit the voltage signal that C.T Acquisition Circuit and fiducial temperature circuit are exported, and output switch circuit can be controlled conducting and the shutoff between freezer compressor and power circuit by the comparative result of temperature comparison circuit, and then reach the at high temperature effect of closing refrigerator compressor, extended freezer compressor service life, reduced maintenance cost and improve security performance.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the frame diagram of safety-type refrigerator control circuit described in the utility model.
Fig. 2 is the circuit diagram of safety-type refrigerator control circuit described in the utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that, protection domain of the present utility model is made to more explicit defining.
Embodiment
Consult shown in Fig. 1, a kind of safety-type refrigerator control circuit that the present embodiment provides, is mainly used in controlling conducting and the shutoff between freezer compressor 5 and power circuit 6, and this control circuit comprises:
Temperature collection circuit 1, for detection of freezer compressor temperature, and exports a detectable voltage signals;
Fiducial temperature circuit 2, for exporting a reference voltage signal;
The temperature comparison circuit 3 being connected with temperature collection circuit 1 and fiducial temperature circuit 2, the reference voltage signal that the detectable voltage signals of exporting for C.T Acquisition Circuit 1 and fiducial temperature circuit 2 are exported, and output and control signal;
And the output switch circuit 4 being connected with temperature comparison circuit 3, for conducting and shutoff between control signal control freezer compressor 5 and the power circuit 6 exported according to temperature comparison circuit 3.
Total principle of the safety-type refrigerator control circuit of the present embodiment is: carry out by temperature comparison circuit 3 voltage signal that C.T Acquisition Circuit 1 and fiducial temperature circuit 2 are exported, and output switch circuit 4 can be controlled conducting and the shutoff between freezer compressor 5 and power circuit 6 by the comparative result of temperature comparison circuit 3, and then reach the at high temperature effect of closing refrigerator compressor 5, further extended freezer compressor service life, reduced maintenance cost and improve security performance.
Consult shown in Fig. 2, for the physical circuit figure of the safety-type refrigerator control circuit of the present embodiment, wherein, temperature collection circuit 1 comprises the first resistance R 1 and the first thermistor RT1 of mutual series connection, one end of the first resistance R 1 is connected with power supply vcc, one end ground connection of the first thermistor RT1, and the link T1 of the first resistance R 1 and the first thermistor RT1 is connected with temperature comparison circuit 3, the first resistance R 1 is wherein as pull-up resistor, and the first thermistor RT1 adopts NTC thermistor; The principle of this temperature collection circuit 1 is: in the time that the residing environment temperature of the first thermistor RT1 changes, the resistance value of the first thermistor RT1 can change along with the variation of environment temperature, and be called for short T1 voltage signal below the link T1(of the first resistance R 1 and the first thermistor RT1) voltage signal also change, be temperature when higher, T1 voltage signal is lower.
Described fiducial temperature circuit 2 comprises the second resistance R 2 and the second thermistor RT2 of mutual series connection, one end of the second resistance R 2 is connected with power supply vcc, one end ground connection of the second thermistor RT2, the link T2 of the second resistance R 2 and the second thermistor RT2 is connected with temperature comparison circuit 3, equally, the second resistance R 2 is wherein as pull-up resistor, and the second thermistor RT2 adopts NTC thermistor; The principle of this fiducial temperature circuit 2 is: can be by the second thermistor RT2 under the environment in a constant temperature (temperature can be set as required), be now called for short T2 voltage signal below the link T2(of the second resistance R 2 and the second thermistor RT2) a stable voltage signal of output.
Described temperature comparison circuit 3 comprises operational amplifier U1 and the 3rd resistance R 3, the reversed-phase output of operational amplifier U1 is connected with the output of fiducial temperature circuit 2, its in-phase output end is connected with the output of temperature collection circuit 1, its output is connected with the input of output switch circuit 4, and the 3rd resistance R 3 is also connected between power supply vcc and the output of operational amplifier U1; The principle of this temperature comparison circuit 3 is: in the time that T2 voltage signal is less than T1 voltage signal (temperature of freezer compressor 5 is low with respect to fiducial temperature), operational amplifier U1 exports high level signal, in the time that T2 voltage signal is greater than T1 voltage signal (temperature of freezer compressor 5 is high with respect to fiducial temperature), operational amplifier U1 output low level signal.
Described output switch circuit 4 comprises triode Q1 and relay K 1, the base stage of triode Q1 is connected with the output of temperature comparison circuit 3, its colelctor electrode is connected with power supply vcc by the main coil of relay K 1, its grounded emitter, and the main contacts two ends of relay K 1 are connected with freezer compressor 5 and power circuit 6 respectively, the principle of this output switch circuit 4 is: in the time of operational amplifier U1 output high level signal (temperature of freezer compressor 5 is low with respect to fiducial temperature), triode Q1 conducting, the coil of relay K 1 obtains electric, its main contacts closure, freezer compressor 5 is with power circuit 6 in conducting state, and refrigerator is in normal duty, and in the time of operational amplifier U1 output low level signal (temperature of freezer compressor 5 is high with respect to fiducial temperature), not conducting of triode Q1, the coil losing electricity of relay K 1, main contacts is in disconnecting, freezer compressor 5 and power circuit 6 are in off state, be that refrigerator is in off-mode, the real-time cooling of freezer compressor 5 now, in the time that temperature is down to suitable temperature, operational amplifier U1 exports high level signal, triode Q1 conducting, the coil of relay K 1 obtains electric, its main contacts closure, and then make freezer compressor 5 and power circuit 6 in conducting state, be that refrigerator is again in normal duty.Learn the best results of generally shutting down 12 minutes every 12 hours from refrigerator according to experiment.
Although described by reference to the accompanying drawings embodiment of the present utility model; but the patent owner can make various distortion or amendment within the scope of the appended claims; as long as be no more than the described protection domain of claim of the present utility model, all should be within protection domain of the present utility model.
Claims (5)
1. a safety-type refrigerator control circuit, for controlling conducting and the shutoff between freezer compressor (5) and power circuit (6), is characterized in that: this control circuit comprises,
Temperature collection circuit (1), for detection of freezer compressor temperature, and exports a detectable voltage signals;
Fiducial temperature circuit (2), for exporting a reference voltage signal;
The temperature comparison circuit (3) being connected with temperature collection circuit (1) and fiducial temperature circuit (2), for the detectable voltage signals of C.T Acquisition Circuit (1) output and the reference voltage signal of fiducial temperature circuit (2) output, and output and control signal;
And the output switch circuit (4) being connected with temperature comparison circuit (3), for conducting and shutoff between control signal control freezer compressor (5) and the power circuit (6) exported according to temperature comparison circuit (3).
2. safety-type refrigerator control circuit according to claim 1, is characterized in that:
Described temperature collection circuit (1) comprises the first resistance (R1) and first thermistor (RT1) of mutual series connection, one end of described the first resistance (R1) is connected with power supply vcc, one end ground connection of described the first thermistor (RT1), the link (T1) of described the first resistance (R1) and the first thermistor (RT1) is connected with temperature comparison circuit (3).
3. safety-type refrigerator control circuit according to claim 1, is characterized in that:
Described fiducial temperature circuit (2) comprises the second resistance (R2) and second thermistor (RT2) of mutual series connection, one end of described the second resistance (R2) is connected with power supply vcc, one end ground connection of described the second thermistor (RT2), the link (T2) of described the second resistance (R2) and the second thermistor (RT2) is connected with temperature comparison circuit (3).
4. safety-type refrigerator control circuit according to claim 1, is characterized in that:
Described temperature comparison circuit (3) comprises operational amplifier (U1) and the 3rd resistance (R3), the reversed-phase output of described operational amplifier (U1) is connected with the output of fiducial temperature circuit (2), its in-phase output end is connected with the output of temperature collection circuit (1), its output is connected with the input of output switch circuit (4), and described the 3rd resistance (R3) is also connected between power supply vcc and the output of operational amplifier (U1).
5. according to the safety-type refrigerator control circuit described in claim 1 to 4 any one, it is characterized in that:
Described output switch circuit (4) comprises triode (Q1) and relay (K1), the base stage of described triode (Q1) is connected with the output of temperature comparison circuit (3), its colelctor electrode is connected with power supply vcc by the main coil of relay (K1), its grounded emitter, and the main contacts two ends of described relay (K1) are connected with freezer compressor (5) and power circuit (6) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420343281.6U CN203908197U (en) | 2014-06-25 | 2014-06-25 | Safe refrigerator control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420343281.6U CN203908197U (en) | 2014-06-25 | 2014-06-25 | Safe refrigerator control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203908197U true CN203908197U (en) | 2014-10-29 |
Family
ID=51782463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420343281.6U Expired - Fee Related CN203908197U (en) | 2014-06-25 | 2014-06-25 | Safe refrigerator control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203908197U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873040A (en) * | 2018-08-30 | 2020-03-10 | 安徽美芝制冷设备有限公司 | Protection circuit and system of variable frequency compressor and refrigerator |
-
2014
- 2014-06-25 CN CN201420343281.6U patent/CN203908197U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873040A (en) * | 2018-08-30 | 2020-03-10 | 安徽美芝制冷设备有限公司 | Protection circuit and system of variable frequency compressor and refrigerator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20180625 |