CN201221828Y - Air conditioner fault alarming circuit - Google Patents
Air conditioner fault alarming circuit Download PDFInfo
- Publication number
- CN201221828Y CN201221828Y CNU2008200941024U CN200820094102U CN201221828Y CN 201221828 Y CN201221828 Y CN 201221828Y CN U2008200941024 U CNU2008200941024 U CN U2008200941024U CN 200820094102 U CN200820094102 U CN 200820094102U CN 201221828 Y CN201221828 Y CN 201221828Y
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- air conditioner
- control unit
- central control
- circuit
- sample
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model provides an air conditioner malfunction alarm circuit, which comprises a central control unit, a DC power supply, sampling resistors connected in series in turn and detection devices connected with the sampling resistors in parallel. The sampling resistors sample the voltage of the DC power supply, and transmit the voltage value resulting from sampling to the central control unit. The central control unit determines the unit in fault through the sampled voltage; the voltage sampling mode achieves high-precision alarming flexibly. In addition, the circuit is very simple in structure and practical. The detection signals of the detection devices in the embodiment are DC light current, thus eliminating the risk of leakage. The air conditioner malfunction alarm circuit is safe and consumes low energy.
Description
Technical field
The utility model belongs to field of air conditioning, relates in particular to a kind of failure alarm circuit that is applied in the air-conditioner.
Background technology
Air-conditioner has obtained using widely in various occasions; because the characteristic of air-conditioner itself; repair procedures more complicated after it damages; therefore; for preventing that air-conditioner system from damaging; at present a lot of air-conditioners comprise that all various faults detects and warning circuit, so that can in time report to the police when unusual condition appears in air-conditioner and take the safeguard measure of shutting down, avoid the badly damaged maintenance cost of bringing of air-conditioner.Generally speaking, the failure alarm circuit of air-conditioner need be finished following several function: power phase abnormal protection, the protection of press current anomaly, system pressure abnormal protection and delivery temperature abnormal protection.These defencive functions are realized by corresponding circuit of testing the phase sequence, current detection circuit, pressure switch and exhaust temperature controller; its detection signal normally 220V forceful electric power is pressed; in order to distinguish the type of fault when the fault alarm; various testing circuits are connected respectively to the central control unit of indoor set; in case certain fault occurs; corresponding testing circuit is sent to central control unit with alarm signal immediately, and user or maintenance personal just can judge concrete parts or the reason that air-conditioning breaks down according to alarm signal.
Yet there are following two open defects at least in above-mentioned existing warning circuit:
1, because the detection signal of above-mentioned available circuit adopts the 220V forceful electric power to press, and the system pressure checkout gear of air-conditioning and exhaust temperature detection means often are in high temperature, high wet condition, and forceful electric power is pressed by there being electric leakage hidden danger for a long time.
2, each checkout gear circuit is connected respectively to central control unit, and not only its circuit cost is higher, and circuit is also very complicated, is unfavorable for maintenance.
The utility model content
The purpose of this utility model is to provide a kind of air conditioner fault warning circuit, and it solves existing failure alarm circuit cost height and circuit complicated problems.
The utility model air conditioner fault warning circuit comprises: central control unit, dc source, the sample resistance that is connected in series successively and each checkout gear in parallel respectively with sample resistance, above-mentioned dc source is carried out voltage sampling to described sample resistance and the magnitude of voltage of the gained of will taking a sample transfers to central control unit.
Described central control unit is MCU.
The number of described sample resistance is 5, wherein the two ends of four sample resistances following four checkout gears respectively in parallel: circuit of testing the phase sequence, current detection circuit, pressure switch, exhaust temperature controller.
Described dc source connects a current-limiting resistance.
Described dc source is 5V.
The utility model air conditioner fault warning circuit is taken a sample to dc source by sample resistance, and the magnitude of voltage of the gained of will taking a sample transfers to central control unit, central control unit is judged trouble unit by sampling voltage value, the mode of this kind voltage sampling has realized high-precision warning neatly, and circuit structure is very simple, practical; In addition, the detection signal of each checkout gear is a direct current light current in the present embodiment, has eliminated electric leakage hidden danger, safety and low-power consumption.
Description of drawings
Fig. 1 is the circuit diagram of the utility model air conditioner fault warning circuit;
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Shown in Fig. 1, the air conditioner fault warning circuit that the utility model preferred embodiment provided comprises central control unit 11 (can be microprocessors such as MCU), dc source (+5V, figure is mark not), current-limiting resistance R1, Chuan Jie sample resistance R2～R6 and the various checkout gears in parallel respectively successively with sample resistance R2～R5, the listed checkout gear of enumerating comprises among Fig. 1: circuit of testing the phase sequence 12 (being connected in parallel on the R2 two ends), current detection circuit 13 (being connected in parallel on the R3 two ends), pressure switch 14 (being connected in parallel on the R4 two ends), exhaust temperature controller 15 (being connected in parallel on the R5 two ends).
Operation principle of the present utility model is as follows: current-limiting resistance R1, sample resistance R2～R6 constitutes a voltage sample circuit, voltage sample circuit is input to central control unit 11 in the junction of resistance R 1 and resistance R 2 with detected sampling voltage value, and central control unit 11 is determined the duty of off-premises station according to detected sampling voltage value.When phase sequence, electric current, pressure, delivery temperature all just often, circuit of testing the phase sequence 12, current detection circuit 13, pressure switch 14 and the 15 equal conductings of exhaust temperature controller (make corresponding sample resistance by short circuit, be that no current passes through in the sample resistance), the magnitude of voltage that central control unit 11 collects is the pressure drop on the resistance R 6, at this moment, central control unit 11 thinks that air-conditioner is working properly.Any one occurs when unusual when the phase sequence of air-conditioner, electric current, pressure, delivery temperature, then the relevant detection circuit disconnects (being the sample resistance conducting), make the magnitude of voltage that collects change, this variation pass through relatively sampling voltage value, central control unit can be judged faulty component, and shows the corresponding failure code on display board.
For the utility model better is described, it is as follows to give an actual example: suppose R1=5.1K ohm, R2=1K ohm, R3=2K ohm, R4=3.6K ohm, R5=5.1K ohm, R6=2.7K ohm, then can learn that by calculating trouble point and sampling voltage value correspondence table are as follows:
| Sampling voltage | 1.73V | 2.1V | 2.4V | 2.76V | 3.02V |
| Fault is judged | Fault-free | The phase sequence mistake | The press electric current is excessive | System pressure is unusual | Excessive discharge temperature |
Certainly, if a plurality of fault occurs simultaneously, then by above-mentioned special sampling voltage value summation, central control unit 11 equally also can be judged a plurality of concrete faulty components.
Obviously, the described air conditioner fault warning circuit of present embodiment is taken a sample to dc source by sample resistance R2～R6, and the magnitude of voltage of the gained of will taking a sample transfers to central control unit, mode by this kind voltage sampling has realized high-precision warning, and circuit structure is very simple, practical; In addition, the detection signal of each checkout gear is a direct current light current in the present embodiment, has eliminated electric leakage hidden danger, safety and low-power consumption.
The above only is preferred embodiment of the present utility model, and in order to restriction the utility model, for example, the resistance of sample resistance R2～R6 can be according to the actual conditions adjustment; Checkout gear also is not limited to circuit of testing the phase sequence 12, current detection circuit 13, pressure switch 14, exhaust temperature controller 15 these four kinds, fully can be according to the actual conditions of system and the function of required realization, increase other checkout gear, the checkout gear that is increased is connected in parallel on corresponding sample resistance two ends and gets final product, certainly, also can reduce the value volume and range of product of checkout gear according to actual conditions.In sum, all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the claim protection domain of the present utility model.
Claims (5)
1, a kind of air conditioner fault warning circuit comprises:
Central control unit;
Dc source,
Chuan Jie sample resistance successively; And
Each checkout gear in parallel respectively with sample resistance, above-mentioned dc source is carried out voltage sampling to described sample resistance and the magnitude of voltage of the gained of will taking a sample transfers to central control unit.
2, air conditioner fault warning circuit according to claim 1 is characterized in that, described central control unit is MCU.
3, air conditioner fault warning circuit according to claim 1, it is characterized in that, the number of described sample resistance is 5, wherein the two ends of four sample resistances following four checkout gears respectively in parallel: circuit of testing the phase sequence, current detection circuit, pressure switch, exhaust temperature controller.
4, air conditioner fault warning circuit according to claim 1 is characterized in that, described dc source connects a current-limiting resistance.
5, air conditioner fault warning circuit according to claim 1 is characterized in that, described dc source is 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200941024U CN201221828Y (en) | 2008-05-20 | 2008-05-20 | Air conditioner fault alarming circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200941024U CN201221828Y (en) | 2008-05-20 | 2008-05-20 | Air conditioner fault alarming circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201221828Y true CN201221828Y (en) | 2009-04-15 |
Family
ID=40575334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200941024U Expired - Fee Related CN201221828Y (en) | 2008-05-20 | 2008-05-20 | Air conditioner fault alarming circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201221828Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355945A (en) * | 2017-06-26 | 2017-11-17 | 中山火炬职业技术学院 | Air conditioner outdoor unit fault alarm and protection circuit structure and method |
| CN110596518A (en) * | 2019-10-14 | 2019-12-20 | 珠海格力电器股份有限公司 | Fault detection circuit with simplified structure, fault judgment method and air conditioning equipment |
-
2008
- 2008-05-20 CN CNU2008200941024U patent/CN201221828Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355945A (en) * | 2017-06-26 | 2017-11-17 | 中山火炬职业技术学院 | Air conditioner outdoor unit fault alarm and protection circuit structure and method |
| CN110596518A (en) * | 2019-10-14 | 2019-12-20 | 珠海格力电器股份有限公司 | Fault detection circuit with simplified structure, fault judgment method and air conditioning equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20090415 Termination date: 20130520 |