CN104009457B - A kind of compressor of air conditioner protection control method and device - Google Patents

A kind of compressor of air conditioner protection control method and device Download PDF

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Publication number
CN104009457B
CN104009457B CN201410227516.XA CN201410227516A CN104009457B CN 104009457 B CN104009457 B CN 104009457B CN 201410227516 A CN201410227516 A CN 201410227516A CN 104009457 B CN104009457 B CN 104009457B
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China
Prior art keywords
compressor
air conditioner
current
signal
spm
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CN201410227516.XA
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Chinese (zh)
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CN104009457A (en
Inventor
鲍殿生
陈建昌
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邯郸美的制冷设备有限公司
美的集团武汉制冷设备有限公司
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Priority to CN201410227516.XA priority Critical patent/CN104009457B/en
Publication of CN104009457A publication Critical patent/CN104009457A/en
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Abstract

The invention belongs to compressor control technical field, there is provided a kind of compressor of air conditioner protection control method and device.The present invention is by when the protection signal input of SPM receives over-current detection signal, judge whether the fault-signal outfan of SPM exports fault-signal in preset time period, if, then control power protection switch module with straight-through power supply mode output supply current, if not, then show that SPM damages, so needing to control power protection switch module with current-limiting mode, supply current to be decreased in preset security current range, thus in the case that SPM damages, abnormal over-current phenomenon avoidance in the driving current avoiding compressor of air conditioner by reducing supply current, compressor of air conditioner is played with good overcurrent protection, solve the problems, such as to realize overcurrent protection when SPM damages to compressor of air conditioner existing for prior art.

Description

A kind of compressor of air conditioner protection control method and device

Technical field

The invention belongs to compressor control technical field, more particularly, to a kind of compressor of air conditioner protection control method and dress Put.

Background technology

Currently for the control of compressor of air conditioner, as shown in figure 1, being the system power supply 100 when air-conditioner outdoor unit obtains electric Export after the alternating current AC being exported is processed to power protection switch module 200, first power supply is controlled by master controller 300 Protection switch module 200 is with current-limiting mode (i.e. power protection switch module 200 carries out current limliting process to output current) for intelligence Power model 400 (IPM, Intelligent PowerModule) is powered and the compressor being installed in air-conditioner outdoor unit is opened Dynamic condenser is charged, and over time, master controller 300 controls power protection switch module 200 to be converted to straight-through confession Electrically (i.e. power protection switch module 200 does not carry out current limliting process direct output of DC current to output current) is to intelligent work( Rate module 400 is powered, then SPM 400 now starts to control compressor of air conditioner 500 to be operated.Above-mentioned in sky The reason adjust off-premises station to power with current-limiting mode for SPM 400 and compressor start electric capacity is charged when obtaining electric Be in order to avoid air-conditioner outdoor unit upper electricity when moment compressor start electric capacity is charged with occurred excessively stream spark phenomenon.

During SPM 400 controls compressor of air conditioner 500 operating, if compressor of air conditioner 500 occurs Over-current phenomenon avoidance, then the protection signal input CIN of SPM 400 can receive over-current detection module 600 and be exported Over-current detection signal SCIN, and therefore close broken phase current (Iu, Iv and Iw) output to control compressor of air conditioner 500 to shut down, in intelligence Power model 400 receives above-mentioned over-current detection signal SCINA period of time T1 after (it can be high level signal) is (as 10 μ s ~30 μ s) in, the fault-signal outfan F0 of SPM 400 can export fault-signal SF0(it can be low level arteries and veins Rush signal, pulsewidth T2 can be 10 μ s~40 μ s) to master controller 300, over-current detection signal SCINWith fault-signal SF0Sequential such as Shown in Fig. 2, then master controller 300 is according to fault-signal SF0Turn off the drive signal output to IPM, thus can avoid intelligent power Other circuit because excessively streams of module 400, compressor of air conditioner 500 and air-conditioning and suffer damage.

However, in above process, if SPM 400 damages, (the IGBT pipe as within IPM is because of damage Short circuit), if now the protection signal input CIN of SPM 400 can receive over-current detection signal SCIN, then intelligence Power model 400 can cannot turn off its internal IGBT pipe because of damage, and cannot export fault-signal SF0To master controller 300, then master controller 300 may proceed to SPM 400 output drive signal, then in SPM 400 In the case of the IGBT tube short circuit in portion, will make the driving current of compressor of air conditioner 500 that abnormal excessively stream occurs, and then lead to sky The Inside coil adjusting compressor 500 generates heat because of excessively stream damage, or even can act initiation fire of fighting.

In sum, prior art exists and cannot realize overcurrent protection when SPM damages to compressor of air conditioner Problem.

Content of the invention

It is an object of the invention to provide a kind of compressor of air conditioner protection control method is it is intended to solve existing for prior art The problem that when SPM damages, compressor of air conditioner cannot be realized with overcurrent protection.

The present invention is achieved in that a kind of compressor of air conditioner protection control method, and it comprises the following steps:

A. judge whether the protection signal input of SPM receives over-current detection signal, be, then execute step Rapid B, no, then return execution step A;

B. judge whether the fault-signal outfan of described SPM exports fault-signal in preset time period, It is, then execution step C, no, then execution step D;

C. control power protection switch module with straight-through power supply mode output supply current;

D. power protection switch module is controlled with current-limiting mode, supply current to be decreased in preset security current range.

Another object of the present invention also resides in a kind of compressor of air conditioner of offer and protects control device, and it includes:

Excessively stream judge module, whether the protection signal input for judging SPM receives over-current detection letter Number, and judged result for no when return continue judge whether the protection signal input of described SPM receives institute State over-current detection signal;

Fault-signal judge module, for when the judged result of described excessively stream judge module is for being, judging described intelligence Whether the fault-signal outfan of power model exports fault-signal in preset time period;

Power control module, for when the judged result of described fault-signal judge module is for being, controlling power protection Switch module is with straight-through power supply mode output supply current, when the judged result of described fault-signal judge module is no, control Power protection switch module processed with current-limiting mode, supply current is decreased in preset security current range.

The present invention is by when the protection signal input of SPM receives over-current detection signal, judging intelligence Whether the fault-signal outfan of power model exports fault-signal in preset time period, if so, then controls power protection to open Close module with straight-through power supply mode output supply current, if it is not, then showing that SPM damages, so needing to control electricity Source protection switch module with current-limiting mode, supply current is decreased in preset security current range, thus in SPM In the case of damage, the driving current of compressor of air conditioner is avoided abnormal over-current phenomenon avoidance to occur, to sky by reducing supply current Adjust compressor play good overcurrent protection, solve existing for prior art cannot be when SPM damages Compressor of air conditioner is realized with the problem of overcurrent protection.

Brief description

Fig. 1 is the schematic diagram of the control system of air-conditioning compressor that prior art is related to;

Fig. 2 is the over-current detection signal S being related in Fig. 1CINWith fault-signal SF0Sequential chart;

Fig. 3 is the flowchart that control method protected by compressor of air conditioner provided in an embodiment of the present invention;

It is air conditioner compressed shown in Fig. 1 that Fig. 4 is that compressor of air conditioner provided in an embodiment of the present invention protection control device is applied to The schematic diagram of machine control system.

Specific embodiment

In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, right The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, and It is not used in the restriction present invention.

Fig. 3 shows that what compressor of air conditioner provided in an embodiment of the present invention protected control method realizes flow process, for the ease of Illustrate, illustrate only the part related to the embodiment of the present invention, details are as follows:

In step sl, judge whether the protection signal input CIN of the SPM 400 in Fig. 1 received Stream detection signal SCIN, it is, then execution step S2, no, then return execution step S1.

In step s 2, whether the fault-signal outfan F0 judging SPM 400 in Fig. 1 is in Preset Time Output fault-signal S in sectionF0, it is, then execution step S3, no, then execution step S4.

In step s3, control the power protection switch module 200 in Fig. 1 with straight-through power supply mode output supply current.

In step s 4, the power protection switch module 200 in Fig. 1 is controlled to be decreased to supply current with current-limiting mode pre- If in the range of safe current.

Wherein, the span of above-mentioned preset time period can be [20 μ s, 10ms], and μ s is microsecond, and ms is millisecond.? In Fig. 1, due in the case of SPM 400 is unspoiled, if it receives the mistake that over-current detection module 600 sends Stream detection signal SCIN, then fault-signal S can be exported after the time by the T1 (10 μ s~30 μ s) shown in correspondingly in Fig. 2F0To master control Device 600 processed, so in actual applications, in order to judge SPM by execution step S2 at short notice Whether 400 damage, and when determining that SPM 400 damages, timely execution step S4 is to air conditioner compressed in Fig. 1 Overcurrent protection realized by machine 500, thus above-mentioned for detecting fault-signal SF0Preset time period be preferably 20 μ s.

For step S3, the fault-signal outfan F0 due to having determined SPM 400 by step S2 is defeated Be out of order signal SF0, then show SPM 400 normal work, and from prior art, SPM 400 be Turn off the output of its phase current, the master controller 300 shown in Fig. 1 also turns off the drive signal to SPM 400 and exports, Compressor of air conditioner 500 also would not be subject to overcurrent damage, so power protection switch module 200 can maintain original straight-through power supply Mode, and because SPM 400 has been turned off the output of its phase current, so what power protection switch module 200 was exported Supply current can substantially reduce.

Fig. 4 shows that compressor of air conditioner protection control device provided in an embodiment of the present invention is applied to the air-conditioning shown in Fig. 1 The schematic diagram of compressor control system, for convenience of description, illustrate only the part related to the embodiment of the present invention, describes in detail such as Under:

Compressor of air conditioner protection control device includes:

Excessively stream judge module 10, whether the protection signal input CIN for judging SPM 400 received Stream detection signal SCIN, and judged result for no when return and continue to judge the protection signal input of SPM 400 Whether CIN receives over-current detection signal SCIN

Fault-signal judge module 20, for when the judged result of excessively stream judge module 10 is for being, judging intelligent power Whether the fault-signal outfan F0 of module 400 exports fault-signal S in preset time periodF0

Power control module 30, for when the judged result of fault-signal judge module 20 is for being, controlling power protection Switch module 200 is with straight-through power supply mode output supply current, when the judged result of fault-signal judge module 20 is no, control Power protection switch module 200 processed with current-limiting mode, supply current is decreased in preset security current range.

In actual application, as shown in figure 4, above-mentioned excessively stream judge module 10, fault-signal judge module 20 with And power control module 30 can be built in the master controller 300 shown in Fig. 1, as the part in master controller 300 with reality Existing above-mentioned functions.

The embodiment of the present invention is by when the protection signal input of SPM receives over-current detection signal, sentencing Whether the fault-signal outfan of disconnected SPM exports fault-signal in preset time period, if so, then controls power supply Protection switch module exports supply current with straight-through power supply mode, if it is not, then showing that SPM damages, so needing Power protection switch module is controlled with current-limiting mode, supply current to be decreased in preset security current range, thus in intelligent work( In the case of rate module damage, avoid the driving current of compressor of air conditioner that abnormal excessively stream occurs by reducing supply current existing As, compressor of air conditioner is played with good overcurrent protection, solve existing for prior art cannot be in intelligent power mould When block damages, compressor of air conditioner is realized with the problem of overcurrent protection.

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.

Claims (6)

1. a kind of compressor of air conditioner protection control method it is characterised in that described compressor of air conditioner protection control method include with Lower step:
A. judge whether the protection signal input of SPM receives over-current detection signal, be, then execution step B, No, then return execution step A;
B. judge whether the fault-signal outfan of described SPM exports fault-signal in preset time period, be, Then execution step C, no, then execution step D;
C. control power protection switch module with straight-through power supply mode output supply current;
D. power protection switch module is controlled with current-limiting mode, supply current to be decreased in preset security current range.
2. compressor of air conditioner as claimed in claim 1 protection control method is it is characterised in that the value of described preset time period Scope is [20 μ s, 10ms].
3. compressor of air conditioner protection control method as claimed in claim 1 is it is characterised in that described preset time period is 20 μ s.
4. a kind of compressor of air conditioner protection control device is it is characterised in that described compressor of air conditioner protection control device includes:
Excessively stream judge module, whether the protection signal input for judging SPM receives over-current detection signal, And judged result for no when return and continue to judge whether the protection signal input of described SPM receive described in Over-current detection signal;
Fault-signal judge module, for when the judged result of described excessively stream judge module is for being, judging described intelligent power Whether the fault-signal outfan of module exports fault-signal in preset time period;
Power control module, for when the judged result of described fault-signal judge module is for being, controlling power protection switch Module, with straight-through power supply mode output supply current, when the judged result of described fault-signal judge module is no, controls electricity Source protection switch module with current-limiting mode, supply current is decreased in preset security current range.
5. compressor of air conditioner as claimed in claim 4 protection control device is it is characterised in that the value of described preset time period Scope is [20 μ s, 10ms].
6. compressor of air conditioner protection control device as claimed in claim 4 is it is characterised in that described preset time period is 20 μ s.
CN201410227516.XA 2014-05-27 2014-05-27 A kind of compressor of air conditioner protection control method and device CN104009457B (en)

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Publication number Priority date Publication date Assignee Title
CN104967389B (en) * 2015-06-30 2017-11-14 广东美的制冷设备有限公司 The over-current protection method and device of motor driver
CN110412341A (en) * 2019-08-09 2019-11-05 珠海格力电器股份有限公司 IPM over-current detection circuit
CN110588689B (en) * 2019-11-14 2020-02-07 新誉轨道交通科技有限公司 Detection method and related device for protection fault of air conditioner compressor

Citations (2)

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Publication number Priority date Publication date Assignee Title
US7586725B2 (en) * 2007-07-19 2009-09-08 Honeywell International Inc. Method of providing a secondary means of overload protection and leakage current protection in applications using solid state power controllers
CN202485348U (en) * 2012-03-13 2012-10-10 陕西宏冶科技发展有限公司 Drying system for closed furnace bin chamber

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Publication number Priority date Publication date Assignee Title
JP2000245055A (en) * 1999-02-19 2000-09-08 Yazaki Corp Control system of power source mounted on vehicle

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
US7586725B2 (en) * 2007-07-19 2009-09-08 Honeywell International Inc. Method of providing a secondary means of overload protection and leakage current protection in applications using solid state power controllers
CN202485348U (en) * 2012-03-13 2012-10-10 陕西宏冶科技发展有限公司 Drying system for closed furnace bin chamber

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