CN203444023U - Three-phase AC power supply output detection apparatus - Google Patents
Three-phase AC power supply output detection apparatus Download PDFInfo
- Publication number
- CN203444023U CN203444023U CN201320532456.3U CN201320532456U CN203444023U CN 203444023 U CN203444023 U CN 203444023U CN 201320532456 U CN201320532456 U CN 201320532456U CN 203444023 U CN203444023 U CN 203444023U
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- phase
- power supply
- supply output
- current supply
- compressor
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- Air Conditioning Control Device (AREA)
Abstract
The utility model discloses a three-phase AC power supply output detection apparatus. The apparatus comprises an integrated circuit board, a CPU chip installed on the integrated circuit board, and two current transformers both connected with the CPU chip. According to the utility model, based on the principle that there is a difference of 1200 successively between sine wave phase angles of a three-phase AC power supply, whether the power supply is in a positive phase sequence or in a negative phase sequence can be determined by detecting the zero-crossing time of any two phases of currents of the three-phase AC power supply through the current transformers, when the power supply is detected to be in a positive phase sequence, a compressor can be used normally, and when the power supply is detected to be in a negative phase sequence, the compressor immediately stops working so that the compressor is prevented from being burnt due to reverse without gas inhalation and discharge.
Description
Technical field
The utility model relates to compressor of air conditioner starting protection device field, specifically a kind of three-phase alternating-current supply output detecting apparatus.
Background technology
In air-conditioning refrigeration system, for protection compressor can not connect because of the phase sequence of air-conditioner external three-phase alternating-current supply instead, cause reversion without suction and discharge, the factor that even can burn out for screw compressor, therefore in general three-phase control circuit, need install power phase protector additional; Compressor also can, because various factors causes overload, stall, therefore, for protecting compressor and electrical network normally to move, need to install additional overheat protector in general three-phase control load circuit; In whole air conditioner refrigerating control system, by micro computer wiring board, air conditioner is carried out to fuzzy control, realize refrigeration, heat.Overheat protector can only be to excess current, and large electric current is protected, and often in air-conditioning refrigeration system, also can cause that the abnormal duty of little electric current appears in compressor, therefore, needs to set little current protection.
Utility model content
To be solved in the utility modelly with regard to technical matters, be to provide a kind of three-phase alternating-current supply output detecting apparatus, three-phase alternating-current supply three-phase is detected with the phase sequence that is connected of compressor, prevent that phase sequence from connecing instead, the problem that causes compressor to burn out.
The technical solution of the utility model is:
An output detecting apparatus, includes surface-mounted integrated circuit, is installed on the cpu chip on surface-mounted integrated circuit, two current transformers; And two current transformers are all connected with cpu chip.
Described three-phase alternating-current supply output detecting apparatus also includes and is installed on surface-mounted integrated circuit and the switching value output module being connected with cpu chip.
Described three-phase alternating-current supply output detecting apparatus also includes and is installed on surface-mounted integrated circuit and the signal input terminal being connected with cpu chip.
Described surface-mounted integrated circuit is selected epoxy resin PCB printed circuit board (PCB).
Described switching value output module is selected relay module.
Principle of the present utility model:
The utility model is in view of differing successively 120 between three-phase alternating-current supply sine wave phase angle
0principle, the time that can detect any biphase current zero crossing of three-phase alternating-current supply by current transformer judges that power supply is positive phase sequence or negative-phase sequence, when detecting as positive phase sequence, compressor normally uses, detect as negative-phase sequence, compressor quits work immediately, has prevented that compressor reverse rotation is without suction and discharge, causes burning out of compressor; The switching value output module that the utility model is connected with cpu chip can directly be connected with external load-compressor, the start and stop of automatic control compressor; The signal input terminal that the utility model is connected with cpu chip can with other equipment connections of air-conditioning system, gather the control signal of other equipment, realize unified management and control.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is the structural representation that the utility model is connected with three-phase alternating-current supply, compressor respectively.
Embodiment
See Fig. 1, a kind of three-phase alternating-current supply output detecting apparatus, includes epoxy resin PCB printed circuit board (PCB) 1, is installed on cpu chip on epoxy resin PCB printed circuit board (PCB) 12, two current transformers 3, relay module 4 and signal input terminals 5; And two current transformers 3, relay module 4, signal input terminals 5 are all connected with cpu chip 2.
During installation, by in the three-phase output end of three-phase alternating-current supply 6, two-phase is first equidirectional respectively through two current transformers 3 arbitrarily, then together with another, be connected to mutually on three-phase ac contactor 7, relay module 4 of the present utility model is connected to obtaining of control three-phase ac contactor 7 with the wire coil of three-phase ac contactor 7 electric, the three-phase output end of last three-phase ac contactor 7 is connected with external load-compressor 8 simultaneously.
Principle of work of the present utility model:
First open compressor 8, whole power on circuitry, the mistiming of detecting three-phase alternating-current supply 6 any biphase current zero crossings when two current transformers 3 is 6.6ms, three-phase alternating-current supply is positive phase sequence, when the mistiming of any biphase current zero crossing, be 13.2ms, three-phase alternating-current supply is negative-phase sequence, and cpu chip 2 pilot relay modules 4 disconnect three-phase ac contactor 7, thus close compressor 8.
Claims (5)
1. a three-phase alternating-current supply output detecting apparatus, is characterized in that: include surface-mounted integrated circuit, be installed on the cpu chip on surface-mounted integrated circuit, two current transformers; And two current transformers are all connected with cpu chip.
2. a kind of three-phase alternating-current supply output detecting apparatus according to claim 1, is characterized in that: described three-phase alternating-current supply output detecting apparatus also includes and is installed on surface-mounted integrated circuit and the switching value output module being connected with cpu chip.
3. a kind of three-phase alternating-current supply output detecting apparatus according to claim 1, is characterized in that: described three-phase alternating-current supply output detecting apparatus also includes and is installed on surface-mounted integrated circuit and the signal input terminal being connected with cpu chip.
4. a kind of three-phase alternating-current supply output detecting apparatus according to claim 1, is characterized in that: described surface-mounted integrated circuit is selected epoxy resin PCB printed circuit board (PCB).
5. a kind of three-phase alternating-current supply output detecting apparatus according to claim 2, is characterized in that: described switching value output module is selected relay module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320532456.3U CN203444023U (en) | 2013-08-29 | 2013-08-29 | Three-phase AC power supply output detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320532456.3U CN203444023U (en) | 2013-08-29 | 2013-08-29 | Three-phase AC power supply output detection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203444023U true CN203444023U (en) | 2014-02-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320532456.3U Expired - Fee Related CN203444023U (en) | 2013-08-29 | 2013-08-29 | Three-phase AC power supply output detection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203444023U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743065A (en) * | 2014-12-11 | 2016-07-06 | 广东美的制冷设备有限公司 | Air conditioner, compressor reverse rotation protection system and protection method |
| WO2017028617A1 (en) * | 2015-08-17 | 2017-02-23 | 珠海格力节能环保制冷技术研究中心有限公司 | Phase angle acquisition method and system |
| US9759756B2 (en) | 2014-12-15 | 2017-09-12 | Danfoss (Tianjin) Ltd. | Circuit and method for three-phase detection, and compressor |
| CN107294065A (en) * | 2017-08-22 | 2017-10-24 | 合肥天鹅制冷科技有限公司 | Compressor phase shortage fast tripping protection device |
| CN108267649A (en) * | 2016-12-30 | 2018-07-10 | 丹佛斯（天津）有限公司 | Compressor phase sequence detecting method and device and its startup control method and equipment |
| CN109751710A (en) * | 2019-01-11 | 2019-05-14 | 青岛海尔空调电子有限公司 | Compressor control device, system, outdoor unit, air-conditioning and compressor control method |
-
2013
- 2013-08-29 CN CN201320532456.3U patent/CN203444023U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743065A (en) * | 2014-12-11 | 2016-07-06 | 广东美的制冷设备有限公司 | Air conditioner, compressor reverse rotation protection system and protection method |
| US9759756B2 (en) | 2014-12-15 | 2017-09-12 | Danfoss (Tianjin) Ltd. | Circuit and method for three-phase detection, and compressor |
| DE102015121522B4 (en) | 2014-12-15 | 2019-07-18 | Danfoss (Tianjin) Ltd. | Circuit and method for three-phase detection and compressor |
| WO2017028617A1 (en) * | 2015-08-17 | 2017-02-23 | 珠海格力节能环保制冷技术研究中心有限公司 | Phase angle acquisition method and system |
| CN108267649A (en) * | 2016-12-30 | 2018-07-10 | 丹佛斯（天津）有限公司 | Compressor phase sequence detecting method and device and its startup control method and equipment |
| CN107294065A (en) * | 2017-08-22 | 2017-10-24 | 合肥天鹅制冷科技有限公司 | Compressor phase shortage fast tripping protection device |
| CN109751710A (en) * | 2019-01-11 | 2019-05-14 | 青岛海尔空调电子有限公司 | Compressor control device, system, outdoor unit, air-conditioning and compressor control method |
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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: 20140219 Termination date: 20190829 |