CN102022805A - Overvoltage protection circuit of air conditioning refrigerant pipe - Google Patents
Overvoltage protection circuit of air conditioning refrigerant pipe Download PDFInfo
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- CN102022805A CN102022805A CN2009103074275A CN200910307427A CN102022805A CN 102022805 A CN102022805 A CN 102022805A CN 2009103074275 A CN2009103074275 A CN 2009103074275A CN 200910307427 A CN200910307427 A CN 200910307427A CN 102022805 A CN102022805 A CN 102022805A
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Abstract
The invention discloses an overvoltage protection circuit of an air conditioning refrigerant pipe, comprising a main control chip, a first resistor, a first capacitor, an inverter, a triode, a relay, a compressor and an overvoltage protection unit. The first resistor and the first capacitor are used for filtering an output signal of the main control chip, the inverter is used for the reversal processing of the filtered signal, the triode controls the output of the signal processed by the inverter, the output end of the triode is connected with one end of a relay coil, a loop is formed by a contact of the relay, a compressor power supply and the compressor, and the other end of the relay coil is connected with the overvoltage protection unit. The invention has simple structure without changing the whole structure of an air conditioner and the thickness of the refrigerant pipe and can effectively control the start and the stop of the compressor just by adding an extremely simple overvoltage protection circuit in the control circuit, thereby realizing the overvoltage protection and avoiding damaging the refrigerant pipe. Moreover, in the invention, two paths of the overvoltage protection circuits are arranged for dual protection, thereby avoiding causing an abnormal compressor working phenomenon due to single-circuit abnormality.
Description
Technical field
The present invention relates to a kind of air-conditioning.Particularly relate to a kind of air conditioning refrigerant pipe overvoltage crowbar that can avoid causing the breakage of refrigerant pipe because of air conditioner coolant pressure is excessive.
Background technology
Usually air-conditioner is made up of heater, refrigeration machine, clarifier etc., can or purify for room air refrigeration or heating, and can also regulate indoor humidity, for the user creates suitable indoor environment.
Generally speaking, the course of work of air-conditioner is as follows: compressor is with the refrigerant of the refrigerant boil down to high temp/high pressure state of gaseous state; The gaseous coolant of boil down to high temp/high pressure state is cooled in condenser; In expansion valve, again the refrigerant of cooling is converted into the refrigerant of low temperature/low-pressure state; In evaporimeter, by heat exchange, absorb evaporimeter heat on every side, thereby reduce the temperature of surrounding air.
If classification substantially, air-conditioner can be divided into: one constitutes the integral air conditioner on the window etc. of being arranged at of refrigeration and heat rejection function; Be arranged on the indoor indoor set that includes evaporimeter, be arranged on the outdoor Saperated air conditioner that includes the off-premises station of compressor and condenser.Separation type and one-piece typely have an identical function.Saperated air conditioner is provided with the indoor set with cooling/heat release in the indoor, the off-premises station with heat release/cooling and compressor is set in the outside, and links off-premises station and indoor set with the refrigerant pipe.Be arranged on and be provided with condenser (outdoor heat converter) and compressor in the outdoor off-premises station, be arranged in the indoor indoor set, be provided with evaporimeter (indoor heat converter).
Saperated air conditioner is specifically: be arranged on the heat of evaporation that evaporimeter in the indoor set utilizes refrigerant, the temperature of surrounding air is descended, make the temperature of the position periphery that is provided with indoor set be lower than the temperature at other position.Be arranged on compressor and condenser in the off-premises station, the gaseous coolant via evaporimeter is converted to the refrigerant of high temp/high pressure state after, the operation of freezing.In order to improve the cooling effectiveness of refrigerant, in a side of off-premises station cooling fan and the drive motors that drives the cooling fan rotation are installed, make the low relatively force air of outside temperature pass through condenser, thus the cooling refrigerant.
Accompanying drawing 1 is the formation schematic diagram of air-conditioning.
The air conditioner that is used for changes in temperatureization in the past is made of following components.
As shown in Figure 1, be installed in an indoor side, be used as evaporimeter during refrigeration, be used as the indoor thermal converter 1 of condenser when system is warm, be used as condenser when being installed on the refrigeration of an outdoor side and use, be used as when system is warm the outdoor thermal converter 2 that evaporimeter uses, suck the compressor 3 of low-temp low-pressure cold media gas, discharge HTHP cold media gas, the refrigerant pipe 5 of thermal converter 1, outdoor thermal converter 2, compressor 3, expansion member 4 in the expansion member 4 of regulating pressure refrigerant flow, communication chamber.
Compressor from off-premises station is the refrigerant of low-temperature/high-pressure state through the refrigerant that condenser flows out, and needs in expansion valve, the refrigerant that cools off is converted into the refrigerant of low temperature/low-pressure state after, flow into again in the evaporimeter of indoor set, carry out heat exchange.Common employed expansion valve all adopts version capillaceous, and each refrigerant exit all will be connected with capillary 4 on the outdoor thermal converter 2, and then is connected with refrigerant copper pipe 5 by capillary dispenser.
Employed refrigerant mostly is a R22 type refrigerant in the air conditioner at present, and this R22 type refrigerant can produce pollution to air, so now develop the R410a type refrigerant with environmental protection.But this R410a type refrigerant with environmental protection is compared with original R22 type refrigerant, and pressure strengthens.
The control circuit that is adopted in the existing air conditioner as shown in Figure 2, include main control chip 1, the signal of main control chip 1 is carried out the resistance R and the capacitor C of filtering, filtered signal is carried out the phase inverter 2 of anti-phase processing, the coil of the relay 3 that links to each other with phase inverter 2 by triode G, by relay 3 according to the compressor power S of control signal control conducting and the compressor M that connects with compressor power S.
In above-mentioned control circuit, the overvoltage protection measure is not set, in the air-conditioner that this control circuit constitutes, use R410a type refrigerant with environmental protection, can make and cause the breakage of refrigerant pipe by the pressure that pressure in the refrigerant copper pipe will can bear above the refrigerant pipe.
Summary of the invention
Technical problem to be solved by this invention is that a kind of air conditioning refrigerant pipe overvoltage crowbar that can avoid causing because of air conditioner coolant pressure is excessive the breakage of refrigerant pipe is provided.
The technical solution adopted in the present invention is: a kind of air conditioning refrigerant pipe overvoltage crowbar; include the main control chip; the output signal of main control chip is carried out first resistance and first electric capacity of filtering; filtered signal is carried out the phase inverter of anti-phase processing; the triode of the signal output after the control phase inverter is handled; coil one end of the relay that one end links to each other with the output of triode; the contact of described relay and compressor power and compressor constitute the loop, and the other end of described relay coil connects Overvoltage protecting unit.
Described Overvoltage protecting unit includes: be arranged on the condenser of air-conditioner or first temperature sensor on the evaporimeter; first comparator that inverting input links to each other with first temperature sensor signal of first temperature sensor and the signal of having set are compared; the output signal of first comparator is carried out the 4th resistance and second electric capacity of filtering; filtered output signal is connected to relay coil through first triode, and the emitter stage of described first triode connects power supply.
The described signal of having set is provided by the 3rd resistance that is connected the first comparator normal phase input end and the 8th resistance, wherein, described the 3rd resistance connects power supply, described the 8th resistance eutral grounding, and the tie point of described the 3rd resistance and the 8th resistance connects the first comparator normal phase input end.
Described first temperature sensor also connects power supply by second resistance.
Described Overvoltage protecting unit has two paths of signals: wherein the first via includes the condenser that is arranged on air-conditioner or first temperature sensor on the evaporimeter, first comparator that inverting input links to each other with first temperature sensor signal of first temperature sensor and the signal of having set are compared, the 4th resistance and second electric capacity to the output signal of first comparator is carried out filtering are connected to relay coil with filtered output signal through first triode; The second the tunnel includes the condenser that is arranged on air-conditioner or second temperature sensor on the evaporimeter, second comparator that inverting input links to each other with second temperature sensor signal of second temperature sensor and the signal of having set are compared, the output signal of second comparator is carried out the 7th resistance and the 3rd electric capacity of filtering, filtered output signal is connected to the emitter stage of first triode through second triode, and the emitter stage of described second triode connects power supply.
The described signal of having set is respectively: the first via is provided by the 3rd resistance that is connected the first comparator normal phase input end and the 8th resistance, wherein, described the 3rd resistance connects power supply, described the 8th resistance eutral grounding, the tie point of described the 3rd resistance and the 8th resistance connects the first comparator normal phase input end; The 6th resistance and the 9th resistance that secondary route is connected the second comparator normal phase input end provide, wherein, described the 6th resistance connects power supply, described the 9th resistance eutral grounding, and the tie point of described the 6th resistance and the 9th resistance connects the second comparator normal phase input end.
Described first temperature sensor also connects power supply by second resistance, and described second temperature sensor also connects power supply by the 5th resistance.
Air conditioning refrigerant pipe overvoltage crowbar of the present invention; simple in structure; do not change the overall structure of air-conditioner; and the thickness of refrigerant pipe; only by in control circuit, having added very simple overvoltage crowbar; just can effectively control the start and stop of press, realize overvoltage protection, avoid the breakage of refrigerant pipe.And the present invention is provided with the two-way overvoltage crowbar, and duplicate protection is avoided causing the unusual phenomenon of compressor operating unusually because of single channel.
Description of drawings
Fig. 1 is the formation schematic diagram of air-conditioning;
Fig. 2 is the ac control circuit schematic diagram of prior art;
Fig. 3 is the ac control circuit schematic diagram of first embodiment of the invention;
Fig. 4 is the ac control circuit schematic diagram of second embodiment of the invention.
Wherein:
1: the main control chip; 2: phase inverter
3: 4: the first comparators of relay
5: the second comparator S: compressor power
M: compressor
The specific embodiment
Below, be described with reference to the accompanying drawings air conditioning refrigerant pipe overvoltage crowbar of the present invention.
As shown in Figure 3, Figure 4; air conditioning refrigerant pipe overvoltage crowbar of the present invention; include main control chip 1; the output signal of main control chip 1 is carried out first resistance R 1 and first capacitor C 1 of filtering; filtered signal is carried out the phase inverter 2 of anti-phase processing; the triode G of the signal output after control phase inverter 2 is handled; coil one end of the relay 3 that one end links to each other with the output of triode G; the contact of described relay 3 and compressor power S and compressor M constitute the loop, and the other end of described relay 3 coils connects Overvoltage protecting unit.
As shown in Figure 3; described Overvoltage protecting unit includes: be arranged on the condenser of air-conditioner or the first temperature sensor D1 on the evaporimeter; first comparator 4 that inverting input links to each other with the first temperature sensor D1 signal of the first temperature sensor D1 and the signal of having set are compared; the output signal of first comparator 4 is carried out the 4th resistance R 4 and second capacitor C 2 of filtering; filtered output signal is connected to relay 3 coils through the first triode G1, and the emitter stage of the described first triode G1 connects the 12V power supply.The described first temperature sensor D1 also connects the 5V power supply by second resistance R 2.
The described signal of having set is provided by the 3rd resistance R 3 that is connected first comparator, 4 normal phase input ends and the 8th resistance R 8, wherein, described the 3rd resistance R 3 connects the 5V power supply, described the 8th resistance R 8 ground connection, the tie point of described the 3rd resistance R 3 and the 8th resistance R 8 connects first comparator, 4 normal phase input ends.
As shown in Figure 4, described Overvoltage protecting unit has two paths of signals: wherein the first via includes the condenser that is arranged on air-conditioner or the first temperature sensor D1 on the evaporimeter, first comparator 4 that inverting input links to each other with the first temperature sensor D1 signal of the first temperature sensor D1 and the signal of having set are compared, the output signal of first comparator 4 is carried out the 4th resistance R 4 and second capacitor C 2 of filtering, filtered output signal is connected to relay 3 coils through the first triode G1, and the described first temperature sensor D1 also connects the 5V power supply by second resistance R 2; The second the tunnel includes the condenser that is arranged on air-conditioner or the second temperature sensor D2 on the evaporimeter, second comparator 5 that inverting input links to each other with the second temperature sensor D2 signal of the second temperature sensor D2 and the signal of having set are compared, the output signal of second comparator 5 is carried out the 7th resistance R 7 and the 3rd capacitor C 3 of filtering, filtered output signal is connected to the emitter stage of the first triode G1 through the second triode G2, the emitter stage of the described second triode G2 connects the 12V power supply, and the described second temperature sensor D2 also connects the 5V power supply by the 5th resistance R 5.
The described signal of having set is respectively: the first via is provided by the 3rd resistance R 3 that is connected first comparator, 4 normal phase input ends and the 8th resistance R 8, wherein, described the 3rd resistance R 3 connects the 5V power supply, described the 8th resistance R 8 ground connection, the tie point of described the 3rd resistance R 3 and the 8th resistance R 8 connects first comparator, 4 normal phase input ends; The 6th resistance R 6 and the 9th resistance R 9 that secondary route is connected second comparator, 5 normal phase input ends provide, wherein, described the 6th resistance R 6 connects the 5V power supply, described the 9th resistance R 9 ground connection, and the tie point of described the 6th resistance R 6 and the 9th resistance R 9 connects second comparator, 5 normal phase input ends.
Air conditioning refrigerant pipe overvoltage crowbar of the present invention, when compressor operating, the voltage signal (reflecting refrigerant pressure in the current refrigerant pipe) of the condenser that sensor was passed by comparator or the expression temperature of evaporimeter compares with the voltage signal of having set, illustrate that when the voltage of representing temperature is higher than the voltage of having set refrigerant pressure is bigger in the current refrigerant pipe, then need to control input voltage; If the voltage of expression temperature is lower than the voltage of having set and illustrates that refrigerant pressure is normal in the current refrigerant pipe, make compressor carry out work by normal input voltage.
Claims (7)
1. air conditioning refrigerant pipe overvoltage crowbar; include main control chip (1); the output signal of main control chip (1) is carried out first resistance (R1) and first electric capacity (C1) of filtering; filtered signal is carried out the phase inverter (2) of anti-phase processing; the triode (G) of the signal output after control phase inverter (2) is handled; coil one end of the relay (3) that one end links to each other with the output of triode (G); the contact of described relay (3) and compressor power (S) and compressor (M) constitute the loop; it is characterized in that the other end of described relay (3) coil connects Overvoltage protecting unit.
2. air conditioning refrigerant pipe overvoltage crowbar according to claim 1; it is characterized in that; described Overvoltage protecting unit includes: be arranged on the condenser of air-conditioner or first temperature sensor (D1) on the evaporimeter; first comparator (4) that inverting input links to each other with first temperature sensor (D1) signal of first temperature sensor (D1) and the signal of having set are compared; the output signal of first comparator (4) is carried out the 4th resistance (R4) and second electric capacity (C2) of filtering; filtered output signal is connected to relay (3) coil through first triode (G1), and the emitter stage of described first triode (G1) connects the 12V power supply.
3. air conditioning refrigerant pipe overvoltage crowbar according to claim 2; it is characterized in that; the described signal of having set is provided by the 3rd resistance (R3) that is connected first comparator (4) normal phase input end and the 8th resistance (R8); wherein; described the 3rd resistance (R3) connects the 5V power supply; described the 8th resistance (R8) ground connection, the tie point of described the 3rd resistance (R3) and the 8th resistance (R8) connects first comparator (4) normal phase input end.
4. air conditioning refrigerant pipe overvoltage crowbar according to claim 2 is characterized in that, described first temperature sensor (D1) also connects the 5V power supply by second resistance (R2).
5. air conditioning refrigerant pipe overvoltage crowbar according to claim 1, it is characterized in that, described Overvoltage protecting unit has two paths of signals: wherein the first via includes the condenser that is arranged on air-conditioner or first temperature sensor (D1) on the evaporimeter, first comparator (4) that inverting input links to each other with first temperature sensor (D1) signal of first temperature sensor (D1) and the signal of having set are compared, the 4th resistance (R4) and second electric capacity (C2) to the output signal of first comparator (4) is carried out filtering are connected to relay (3) coil with filtered output signal through first triode (G1); The second the tunnel includes the condenser that is arranged on air-conditioner or second temperature sensor (D2) on the evaporimeter, second comparator (5) that inverting input links to each other with second temperature sensor (D2) signal of second temperature sensor (D2) and the signal of having set are compared, the output signal of second comparator (5) is carried out the 7th resistance (R7) and the 3rd electric capacity (C3) of filtering, filtered output signal is connected to the emitter stage of first triode (G1) through second triode (G2), and the emitter stage of described second triode (G2) connects the 12V power supply.
6. air conditioning refrigerant pipe overvoltage crowbar according to claim 5, it is characterized in that, the described signal of having set is respectively: the first via is provided by the 3rd resistance (R3) that is connected first comparator (4) normal phase input end and the 8th resistance (R8), wherein, described the 3rd resistance (R3) connects the 5V power supply, described the 8th resistance (R8) ground connection, the tie point of described the 3rd resistance (R3) and the 8th resistance (R8) connects first comparator (4) normal phase input end; The 6th resistance (R6) and the 9th resistance (R9) that secondary route is connected second comparator (5) normal phase input end provide, wherein, described the 6th resistance (R6) connects the 5V power supply, described the 9th resistance (R9) ground connection, the tie point of described the 6th resistance (R6) and the 9th resistance (R9) connects second comparator (5) normal phase input end.
7. air conditioning refrigerant pipe overvoltage crowbar according to claim 5; it is characterized in that; described first temperature sensor (D1) also connects the 5V power supply by second resistance (R2), and described second temperature sensor (D2) also connects the 5V power supply by the 5th resistance (R5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103074275A CN102022805A (en) | 2009-09-22 | 2009-09-22 | Overvoltage protection circuit of air conditioning refrigerant pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103074275A CN102022805A (en) | 2009-09-22 | 2009-09-22 | Overvoltage protection circuit of air conditioning refrigerant pipe |
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| Publication Number | Publication Date |
|---|---|
| CN102022805A true CN102022805A (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103074275A Pending CN102022805A (en) | 2009-09-22 | 2009-09-22 | Overvoltage protection circuit of air conditioning refrigerant pipe |
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| Country | Link |
|---|---|
| CN (1) | CN102022805A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103108427A (en) * | 2011-11-14 | 2013-05-15 | 深圳市长运通光电技术有限公司 | Light emitting diode (LED) lamp and high voltage monitoring protection circuit |
| CN113771590A (en) * | 2021-10-19 | 2021-12-10 | 柳州市燚盛科技有限公司 | Automobile body air conditioner evaporator protection system |
-
2009
- 2009-09-22 CN CN2009103074275A patent/CN102022805A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103108427A (en) * | 2011-11-14 | 2013-05-15 | 深圳市长运通光电技术有限公司 | Light emitting diode (LED) lamp and high voltage monitoring protection circuit |
| CN103108427B (en) * | 2011-11-14 | 2015-05-13 | 深圳市长运通光电技术有限公司 | Light emitting diode (LED) drive chip, LED lamp and high voltage monitoring protection circuit |
| CN113771590A (en) * | 2021-10-19 | 2021-12-10 | 柳州市燚盛科技有限公司 | Automobile body air conditioner evaporator protection system |
| CN113771590B (en) * | 2021-10-19 | 2024-04-26 | 柳州市燚盛科技有限公司 | Automobile body air conditioner evaporator protection system |
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Application publication date: 20110420 |