CN1202387C - One air conditioner for coolin three places and variable frequency control method - Google Patents
One air conditioner for coolin three places and variable frequency control method Download PDFInfo
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- CN1202387C CN1202387C CN 03113661 CN03113661A CN1202387C CN 1202387 C CN1202387 C CN 1202387C CN 03113661 CN03113661 CN 03113661 CN 03113661 A CN03113661 A CN 03113661A CN 1202387 C CN1202387 C CN 1202387C
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Abstract
The present invention relates to a tri-place air conditioner and a variable frequency control method. The air conditioner comprises an indoor machine and an outdoor machine, wherein a frequency conversion controller which can output three frequency stages of 30Hz to 60Hz, 60Hz to 90Hz, and 90Hz to 120Hz is arranged between a frequency conversion compressor of the outdoor machine and an indoor machine controller. The control method comprises: when one indoor machine runs, the output frequency of the frequency conversion controller is from 30Hz to 60Hz; when the two indoor machines run, the output frequency is from 60Hz to 90Hz; when the three indoor machines run, the output frequency is from 90Hz to 120Hz. Compared with the common industrial frequency multi-place air conditioner, the air conditioner has the advantages of power saving, simple control, high operating reliability, few problems, and less risk of shutdown. The pressures of the compressor system are the same when a single indoor machine runs, the two indoor machines run or the three indoor machines run simultaneously. The air conditioner has the advantages of low cost of fabrication and improvement, small volume of the outdoor machine and easy installation.
Description
(1) technical field
The present invention relates to the air-conditioner technical field, be meant that specifically a kind of one drags three air-conditioners and method for controlling frequency conversion thereof.
(2) background technology
At present, there is following shortcoming in the multi-split air conditioner of single compressor on the market: 1. power consumption was big when the separate unit indoor set moved, Energy Efficiency Ratio is low, the power consumption when power consumption during the air-conditioner separate unit indoor set operation of general one drag two is slightly less than two platform indoor sets operation is far longer than the one-to-one air-conditioner of identical refrigerating capacity; 2. electronic expansion valve regulation complexity, controller control is complicated, and problem is many; 3. when the separate unit indoor set moved, the system pressure height was easily jumped machine, and operational reliability is relatively poor.Also there are problems such as power consumption is big, electronic expansion valve regulation complexity, controller control is complicated, the off-premises station volume is big in the multi-split air conditioner of multi-compressor.
(3) summary of the invention
Purpose of the present invention is exactly in order to solve above-mentioned the deficiencies in the prior art part, provides a kind of one to drag three air-conditioners and method for controlling frequency conversion thereof.This air-conditioner is reliable, and the off-premises station volume is little, and is easy for installation, and control method is simple, power saving.
Of the present invention a kind of one drags three air-conditioners, comprise indoor set and off-premises station, wherein, controller is arranged in the indoor set, off-premises station is made up of frequency-changeable compressor and condenser, it is characterized in that, between frequency-changeable compressor and indoor set controller, be connected with the frequency-variable controller of output 30Hz～60Hz, 60Hz～90Hz, three kinds of frequency bands of 90Hz～120Hz.
In order to realize the present invention better, described indoor set controller has been cancelled compressor relay, cross valve relay and outdoor fan control relay, and former compressor, cross valve and outdoor fan control delivery outlet directly are connected with frequency-variable controller by holding wire respectively; Described indoor set controller also is connected with described frequency-variable controller by the temperature signal line; Described frequency-variable controller has increased solenoid control element circuit and outdoor fan motor control module circuit, and is connected with and heats the signal detection matrix; Described off-premises station has three defrosting thermistors, is arranged on the same detection position point of off-premises station.
Of the present invention a kind of one drags the method for controlling frequency conversion of three air-conditioners, it is characterized in that, when an indoor set operation, frequency-variable controller output frequency 30Hz～60Hz alternating current is given frequency-changeable compressor; When two indoor set operations, output frequency 60Hz～90Hz alternating current is given frequency-changeable compressor; When three indoor set operations, output frequency 90Hz～120Hz alternating current is given frequency-changeable compressor.
In order to realize the present invention better, the output frequency of described frequency-variable controller is by the temperature difference T decision of design temperature and return air temperature.
Indoor set of the present invention adopts power frequency one-to-one indoor machine of air-conditioner controller, but directly do not drive outdoor fan motor, cross valve, compressor, only output a control signal to outdoor frequency-variable controller and change into, export the indoor temperature signal simultaneously, increase and detect the measuring ability whether other indoor set exists the mode of heating by heating the signal detection matrix; The other parts control mode is identical with power frequency one-to-one air-conditioner.
Off-premises station of the present invention utilizes the off-premises station frequency-variable controller master chip of frequency conversion one-to-one air-conditioner, and the detection protected location circuit of delivery temperature, voltage, electric current is identical with frequency conversion one-to-one air-conditioner; Outdoor fan motor control module circuit adopts and the identical ghyristor circuit speed governing of power frequency one-to-one air-conditioner indoor fan motor, and rotating speed is divided into high, medium and low three retainings (concrete rotating speed can be set as required).Rotating speed is provided with high, medium and low three retainings, and play the effect of unloading when heating simultaneously: as I/O mouth P42, the P41 of outdoor frequency-variable controller chip (as: TMP88CK49), when P40 is all high level, outdoor fan turns round with high speed winds; When there being any two when being all high level among the I/O mouth P42 of outdoor frequency-variable controller chip (as: TMP88CK49), P41, the P40, outdoor fan turns round with middling speed wind; When having any one to be high level among the I/O mouth P42 of outdoor frequency-variable controller chip (as: TMP88CK49), P41, the P40, outdoor fan turns round with low velocity wind.
Increased the solenoid control element circuit in the frequency-variable controller of the present invention, in the time of compressor start, opened and the corresponding magnetic valve of indoor set.
The opening ways of cross valve of the present invention is: when have among the I/O mouth P10 of outdoor frequency-variable controller chip (as: TMP88CK49), P11, the P12 any one or a plurality of during for high level, P31 output high level is opened cross valve.
Indoor set of the present invention has increased by the I/O mouth and has been connected to the outdoor line that heats the signal detection matrix by holding wire, its effect is when detecting when having an indoor set to run on heating mode, controls other two machines and can not enter refrigeration mode, dehumidification mode, refrigeration mode or dehumidification mode automatically automatically.
The present invention compared with prior art has following advantage and beneficial effect:
1. the present invention compares with common power frequency multi-split air conditioner, and power savings is obvious.
2. control mode of the present invention is simple, reliable, problem is few.
3. when the present invention works, no matter be the work of separate unit indoor set, when still two platform indoor set work and three indoor sets were worked simultaneously, compressor assembly pressure was basic identical, is difficult for the jumping machine, the operational reliability height.
4. the present invention makes that to improve cost low.
5. off-premises station volume of the present invention is little, easy for installation.
(4) description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the circuit block diagram of the embodiment of the invention;
Fig. 3 is the circuit theory diagrams of the embodiment of the invention;
Fig. 4 is the control flow chart of frequency-variable controller in the embodiment of the invention.
(5) specific embodiment
Below in conjunction with drawings and Examples, the present invention is done description in further detail.
As shown in Figure 1, the present invention is made up of frequency-changeable compressor 1, cross valve 2, condenser 3, capillary 4a, capillary 4b, capillary 4c, indoor set 5A, indoor set 5B, indoor set 5C, magnetic valve 6a, magnetic valve 6b, magnetic valve 6c, triple valve 7, triple valve 8a, triple valve 8b, triple valve 8c, connecting leg 9, three off-premises station defrosting thermistors 10, in off-premises station, increase frequency-variable controller 11, frequency-variable controller 11 output 30Hz～60Hz, 60Hz～90Hz, three kinds of frequency bands of 90Hz～120Hz.
The output frequency control of frequency-variable controller is as follows:
During the operation of indoor set, output frequency 30Hz～60Hz, frequency is by the temperature difference T decision of design temperature and return air temperature: Δ T＜-1 ℃, shutdown;-1≤Δ T≤0 ℃, 30Hz; 0＜Δ T≤1 ℃, 30Hz～40Hz; 1＜Δ T≤2 ℃, 40Hz～50Hz; 2＜Δ T≤3 ℃, 50Hz～60Hz; Δ T＞3 ℃, 60Hz.
During the operation of two indoor sets, output frequency 60Hz～90Hz, frequency is by the mean temperature difference Δ T decision of design temperature and return air temperature: Δ T＜-1 ℃, shutdown;-1≤Δ T≤0 ℃, 60Hz; 0＜Δ T≤1 ℃, 60Hz～70Hz; 1＜Δ T≤2 ℃, 70Hz～80Hz; 2＜Δ T≤3 ℃, 80Hz～90Hz; Δ T＞3 ℃, 90Hz.
During the operation of three indoor sets, output frequency 90Hz～120Hz, frequency is by the mean temperature difference Δ T decision of design temperature and return air temperature: Δ T＜-1 ℃, shutdown;-1≤Δ T≤0 ℃, 90Hz; 0＜Δ T≤1 ℃, 90Hz～100Hz; 1＜Δ T≤2 ℃, 100Hz～110Hz; 2＜Δ T≤3 ℃, 110Hz～120Hz; Δ T＞3 ℃, 120Hz.
With three indoor sets all is that 1 machine is an example, and compressor should select 2 frequency-changeable compressors.The selection principle of frequency-changeable compressor is that the ability of compressor is got 2/3rds of three indoor unit capabilities.The size of condenser is got the summation of three indoor unit capabilities.Hand over the selection of the driven compressor module of controller frequently, should be corresponding with the power of compressor.
As shown in Figure 2, the indoor set controller is interconnected by indoor set CPU master chip, indoor fan control circuit, wind direction motor circuit, honeybee sound control circuit, demonstration and infrared remote controller, temperature detecting unit circuit and indoor set power circuit and forms; Wherein, indoor set CPU master chip rings control circuit, demonstration and infrared remote controller by holding wire with indoor fan control circuit, wind direction motor circuit, honeybee respectively and the temperature detecting unit circuit is connected, interconnect with the indoor set power circuit simultaneously, and be connected with the off-premises station frequency-variable controller.The off-premises station frequency-variable controller by off-premises station CPU master chip, compressor exhaust temperature, overvoltage, over-current detection protected location circuit, driven compressor element circuit, outdoor fan motor control module circuit, cross valve drive circuit, heat signal detection matrix, solenoid control element circuit and off-premises station power circuit and interconnect and form; Wherein, off-premises station CPU master chip respectively by holding wire and compressor exhaust temperature, overvoltage, over-current detection protected location circuit, driven compressor element circuit, outdoor fan motor control module circuit, cross valve drive circuit, heat the signal detection matrix and the solenoid control element circuit is connected, and interconnect with the off-premises station power circuit.
As shown in Figure 3, one drags the controller system of three air-conditioners to be made up of four parts: off-premises station frequency-variable controller, the controller 5a of indoor set 5A, the controller 5b of indoor set 5B, the controller 5c of indoor set 5C.The controller of three indoor sets is identical: indoor set master chip (being ST72215G2 in the present embodiment) is by the infrared remote controller input control signal, output shows signal, the control indoor set is by setting mode operation, and control indoor set pipe temperature is cold excessively, overtemperature protection (this part element circuit 5a1,5b1,5c1 identical with the common air-conditioning device); Output drive IC (being MC1413P in the present embodiment) is used for driving: 1. indoor wind direction motor (present embodiment is socket 5a3,5b3,5c3); 2. honeybee rings control circuit W01, R01; 3. indoor fan motor control circuit (forming by indoor fan motor socket 5a4,5b4,5c4, G21, R21, R22, R23, R24, R25, C21, C22, C23, C24, DW21, SCR21 in the present embodiment).The temperature detecting unit circuit is made up of TH1, TH2, TH3, R11, R12, R13, R14, R15, R16, C11, C12, C13, TH1 is that indoor temperature detects thermistor, TH2 is that indoor pipe temperature detects thermistor, and TH3 is outdoor defrosting temperature detection thermistor.The detected indoor temperature of TH1 is used for indoor set control by R15 input indoor set master chip, is input to the off-premises station frequency-variable controller by holding wire A1, A2, A3 simultaneously, is used for mean temperature difference and control compressor operating frequency in the counting chamber; The indoor set power circuit is used for to the power supply of indoor set controller, and the direct current ground wire of power supply links to each other with the direct current ground wire of off-premises station power supply, makes indoor and outdoor machine controller direct current reference potential identical.Indoor set is connected by holding wire A1, B1, C1, D1, E1, A2, B2, C2, D2, E2, A3, B3, C3, D3, E3 with off-premises station..
The frequency-variable controller of off-premises station consists of the following components: off-premises station master chip (being TMP88CK49 in the present embodiment); Output drives light lotus root (being TLP521 in the present embodiment); Driven compressor MCU (being MIG20JI06L in the present embodiment); Outdoor fan motor control module circuit, this element circuit is made up of outdoor fan motor socket 3, G51, R51, R52, R53, R54, R55, C51, C52, C53, C54, DW51, controllable silicon SCR 51, by SCR control outdoor fan motor rotating speed, rotating speed is divided into high, medium and low three retainings (concrete rotating speed can be set as required).Rotating speed is provided with high, medium and low three retainings, and play the effect of unloading when heating simultaneously: as I/O mouth P42, the P41 of outdoor frequency-variable controller chip (as: TMP88CK49), when P40 is all high level, outdoor fan turns round with high speed winds; When there being any two when being all high level among the I/O mouth P42 of outdoor frequency-variable controller chip (as: TMP88CK49), P41, the P40, outdoor fan turns round with middling speed wind; When having any one to be high level among the I/O mouth P42 of outdoor frequency-variable controller chip (as: TMP88CK49), P41, the P40, outdoor fan turns round with low velocity wind; The cross valve control circuit is made up of R61, SG61, K61, cross valve socket 2.When have among the I/O mouth P10 of outdoor frequency-variable controller chip (as: TMP88CK49), P11, the P12 any one or a plurality of during for high level, P31 output high level is opened cross valve; The solenoid control element circuit, this element circuit is made up of magnetic valve socket 6a, magnetic valve socket 6b, magnetic valve socket 6c, SG41, R41, D41, Ja, SG42, R42, D42, Jb, SG43, R43, D43, Jc, by the control of indoor set signal compressor, open in the time of compressor start and the corresponding magnetic valve of indoor set; Heat the signal detection matrix and be made up of D1, D2, D3, its effect is when detecting when having an indoor set to run on heating mode, controls other two machines and can not enter refrigeration mode, dehumidification mode, refrigeration mode or dehumidification mode automatically automatically.Compressor exhaust temperature, overvoltage, over-current detection protected location circuit control off-premises station carry out (this part element circuit are identical with common transducer air conditioning) such as overheat of compressor protection, brownout protection, overtension protection, the excessive protections of electric current.
Indoor set controller of the present invention and common one-to-one air-conditioner are basic identical, and different is compressor, cross valve and the outdoor fan control relay of having cancelled on the original indoor set controller: former compressor delivery outlet PB3 is connected to I/O mouth P10, P11, P12 or other I/O mouth of outdoor frequency-variable controller chip (as: TMP88CK49) by holding wire B1, B2, B3; Former cross valve delivery outlet PB2 is connected to I/O mouth P13, P14, P15 or other I/O mouth of outdoor frequency-variable controller chip (as: TMP88CK49) by holding wire C1, C2, C3; Former outdoor fan delivery outlet PB1 is connected to I/O mouth P42, P41, P40 or other I/O mouth of outdoor frequency-variable controller chip (as: TMP88CK49) by holding wire D1, D2, D3.Simultaneously, indoor set has increased by S1, S2, S3 by holding wire A1, A2, the A3 line to I/O mouth AN17, AN16, AN15 or other I/O mouth of outdoor frequency-variable controller chip (as: TMP88CK49), the indoor temperature signal is transferred to outdoor frequency-variable controller, and outdoor frequency-variable controller cpu chip (as: TMP88CK49) becomes temperature signal the output frequency of temperature signal Δ T control frequency converter.Indoor set has also increased by I/O mouth PC4 and has been connected to the outdoor line that heats the signal detection matrix by holding wire E1, E2, E3, its effect is, when detecting when having an indoor set to run on heating mode, control other two machines and can not enter refrigeration mode, dehumidification mode, refrigeration mode or dehumidification mode automatically automatically.
Outdoor controller is identical with common one-to-one transducer air conditioning other parts, and different parts are: the output of (1) frequency-variable controller 30Hz～60Hz, 60Hz～90Hz, three kinds of frequency bands of 90Hz～120Hz; (2) increase the solenoid control element circuit, open in the time of compressor start and the corresponding magnetic valve of indoor set; (3) increase outdoor fan motor control module circuit, by SCR control outdoor fan motor rotating speed, rotating speed is divided into high, medium and low three retainings (concrete rotating speed is inessential, can set as required).Rotating speed is provided with the effect that high, medium and low three retainings play unloading when heating simultaneously: as I/O mouth P42, the P41 of outdoor frequency-variable controller chip (as: TMP88CK49), when P40 is all high level, outdoor fan turns round with high speed winds; When there being any two when being all high level among the I/O mouth P42 of outdoor frequency-variable controller chip (as: TMP88CK49), P41, the P40, outdoor fan turns round with middling speed wind; When having any one to be high level among the I/O mouth P42 of outdoor frequency-variable controller chip (as: TMP88CK49), P41, the P40, outdoor fan turns round with low velocity wind; (4) when have among the I/O mouth P10 of outdoor frequency-variable controller chip (as: TMP88CK49), P11, the P12 any one or a plurality of during for high level, P31 output high level is opened cross valve; (5) off-premises station has three defrosting thermistors, is arranged on the same detection position point of off-premises station.
As shown in Figure 4, the course of work of the present invention is as follows:
The work of separate unit indoor set
The separate unit indoor set course of work and common one-to-one air-conditioner are basic identical, for example: when indoor set 5A work is only arranged, magnetic valve 6a is opened, magnetic valve 6b and magnetic valve 6c close, during the air-conditioner refrigerating operaton in 1 minute of start just, have refrigerant and flow through triple valve 8b, capillary 4b, triple valve 8c, capillary 4c, afterwards, because magnetic valve 6b and magnetic valve 6c close, both sides equate after capillary 4b and the capillary 4c pressure at two ends balance, no longer include refrigerant and flow through, indoor set 5B and indoor set 5C do not freeze; During the air conditioner heat-production operation, refrigerant flows only magnetic valve 6b, magnetic valve 6c at the very start, and indoor set 5B and indoor set 5C do not heat.The off-premises station frequency-variable controller only detects the P15 end high level, and output 30Hz～50Hz alternating current is given frequency-changeable compressor.Indoor set 5A is to control compressor and outdoor fan work and protection with common one-to-one air-conditioner same way as.
Two indoor set work
For example: when indoor set 5A and indoor set 5C work, magnetic valve 6a and magnetic valve 6c are opened, magnetic valve 6b closes, during the air-conditioner refrigerating operaton in 1 minute of start just, have refrigerant and flow through after triple valve 8b, the capillary 4b, because magnetic valve 6b closes, both sides equate after the capillary 4b pressure at two ends balance, no longer include refrigerant and flow through, indoor set 5B does not freeze; Refrigerant flows only magnetic valve 6b at the very start during the air conditioner heat-production operation, and indoor set 5B does not heat.The off-premises station frequency-variable controller detects P15 and the P13 end has high level, and output 60Hz～90Hz alternating current is given frequency-changeable compressor.
Three indoor set work
Magnetic valve is all opened, and the off-premises station frequency-variable controller detects P15, P14 and the P13 end has high level, and output 110Hz～120Hz alternating current is given frequency-changeable compressor.
As mentioned above, can realize the present invention preferably.
Claims (4)
1. one kind one is dragged three air-conditioners, comprise indoor set and off-premises station, wherein, controller is arranged in the indoor set, off-premises station is made up of frequency-changeable compressor and condenser, it is characterized in that, between frequency-changeable compressor and indoor set controller, be connected with the frequency-variable controller of output 30Hz～60Hz, 60Hz～90Hz, three kinds of frequency bands of 90Hz～120Hz, described indoor set controller has been cancelled compressor relay, cross valve relay and outdoor fan control relay, and former compressor, cross valve and outdoor fan control delivery outlet directly are connected with frequency-variable controller by holding wire respectively.
2. according to claim 1 a kind of one drags three air-conditioners, it is characterized in that, described indoor set controller also is connected with described frequency-variable controller by the temperature signal line.
3. according to claim 1 a kind of one drags three air-conditioners, it is characterized in that, described frequency-variable controller has increased solenoid control element circuit and outdoor fan motor control module circuit, and is connected with and heats the signal detection matrix.
4. according to claim 1 a kind of one drags three air-conditioners, it is characterized in that, described off-premises station has three defrosting thermistors, is arranged on the same detection position point of off-premises station.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03113661 CN1202387C (en) | 2003-01-27 | 2003-01-27 | One air conditioner for coolin three places and variable frequency control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03113661 CN1202387C (en) | 2003-01-27 | 2003-01-27 | One air conditioner for coolin three places and variable frequency control method |
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| CN1431434A CN1431434A (en) | 2003-07-23 |
| CN1202387C true CN1202387C (en) | 2005-05-18 |
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| CN 03113661 Expired - Fee Related CN1202387C (en) | 2003-01-27 | 2003-01-27 | One air conditioner for coolin three places and variable frequency control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666530B (en) * | 2008-09-04 | 2012-09-05 | 海尔集团公司 | Method for controlling supply frequency of variable frequency compressor |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100640858B1 (en) | 2004-12-14 | 2006-11-02 | 엘지전자 주식회사 | Airconditioner and control method thereof |
| JP5709838B2 (en) * | 2010-03-16 | 2015-04-30 | 三菱電機株式会社 | Air conditioner |
| CN103292466B (en) * | 2012-03-02 | 2015-12-23 | 珠海格力电器股份有限公司 | Frequency conversion heat pump water heater and method for controlling frequency conversion thereof |
| CN104566699B (en) * | 2013-10-10 | 2017-06-20 | 海尔集团公司 | Accumulation of energy multi-variable air conditioning unit and its control method |
| CN107514743B (en) * | 2017-07-27 | 2021-03-16 | 青岛海尔空调器有限总公司 | Air conditioner control method and device and air conditioner |
| CN108758960B (en) * | 2018-03-21 | 2020-02-04 | 青岛海信日立空调系统有限公司 | Time-sharing dehumidification method and device for multi-split air conditioning system and computer storage medium |
| CN108613343A (en) * | 2018-05-28 | 2018-10-02 | 广东美的暖通设备有限公司 | A kind of control method and control system of air conditioner |
| CN110836433A (en) * | 2018-08-16 | 2020-02-25 | 青岛海尔空调电子有限公司 | Control method and control device for multi-split air conditioner |
| CN109269217A (en) * | 2018-11-06 | 2019-01-25 | 泰州市沪江特种设备有限公司 | A kind of control method of the more library frequency conversion refrigerating systems of high/low temperature |
-
2003
- 2003-01-27 CN CN 03113661 patent/CN1202387C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666530B (en) * | 2008-09-04 | 2012-09-05 | 海尔集团公司 | Method for controlling supply frequency of variable frequency compressor |
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