CN1275697A - Starting method for convertor heat pump - Google Patents
Starting method for convertor heat pump Download PDFInfo
- Publication number
- CN1275697A CN1275697A CN00102635A CN00102635A CN1275697A CN 1275697 A CN1275697 A CN 1275697A CN 00102635 A CN00102635 A CN 00102635A CN 00102635 A CN00102635 A CN 00102635A CN 1275697 A CN1275697 A CN 1275697A
- Authority
- CN
- China
- Prior art keywords
- opening
- heat pump
- compressor
- expansion valve
- extent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 19
- 239000003507 refrigerant Substances 0.000 claims abstract description 45
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 230000014759 maintenance of location Effects 0.000 claims description 7
- 230000001133 acceleration Effects 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2106—Temperatures of fresh outdoor air
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
- General Induction Heating (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
To quicken the response speed by operating a compressor while increasing the frequency immediately to a level corresponding to the set temperature of a user when an inverter heat pump is started initially and adjusting the opening of an expansion valve stepwise according to outdoor temperature conditions to reach a final set opening conformable to a set frequency. The opening of an expansion valve is determined by dividing a total time elapsed before reaching an opening dependent on the frequency corresponding to a set temperature by such a minimum sustaining time of opening during that liquid refrigerant does not flow into a compressor. Based on the sustaining time of opening, the opening is adjusted from first start sustaining time of opening f to second, third, fourth and fifth start sustaining times of opening g, h, i, j, sequentially and an inverter heat pump is operated at a final set opening conformable to a set frequency. Since the operating frequency reaches a level corresponding to a set temperature through acceleration, start opening of the expansion valve is varied stepwise according to outdoor temperature conditions.
Description
The present invention relates generally to the startup method of convertor heat pump, be particularly related to the startup method of such convertor heat pump, make the frequency work that a compressor is set with the user when the startup of convertor heat pump, in order to prevent along with the operating frequency refrigerant that increases sharply flows into compressor by a gatherer, the response speed of the heat pump of the temperature of setting according to the user can increase by the extent of opening according to multistage adjustment one expansion valve of ambient temperature.
Fig. 1 is the structural representation of a traditional heat pump.As shown in Figure 1, when the heating work of heat pump, the HTHP refrigerant that is compressed by compressor 1 passes through a cross valve 2 inflow indoor heat exchangers 5, heat radiation, condensation, liquefaction then.Then, change the liquid refrigerant of low-temp low-pressure into by the refrigerant of expansion valve 4 condensations and liquefaction.
After the inflow outdoor heat exchanger 3, the liquid refrigerant evaporation flows into gatherer 6 by cross valve 2 then.The refrigerant that flows into gatherer 6 is divided into gas refrigerant and liquid refrigerant, and gas refrigerant is imported into compressor 1 by suction pipe 7 then.
Simultaneously, during air-conditioning work, the HTHP refrigerant that is compressed by compressor 1 passes through cross valve 2 inflow outdoor heat exchangers 3, condensation, and liquefaction, refrigerant changes low-temp low-pressure refrigerant into by expansion valve 4.Then, the liquid refrigerant inflow indoor heat exchanger 5 of low-temp low-pressure, the heat around absorbing and evaporating flows into gatherers 6 by cross valve 2.The refrigerant that flows into gatherer 6 is divided into gas refrigerant and liquid refrigerant, is imported into compressor 1 by suction pipe 7 gas refrigerants then, thereby uses a heat pump assembly to heat work with air-conditioning simultaneously.
As mentioned above, heat pump is as heater, and by the gas refrigerant release heat of liquefaction HTHP, the temperature and pressure of Ye Hua liquid refrigerant is by expansion valve 4 step-downs again.Heat pump also is used for aircondition, the heat around absorbing by the liquid refrigerant evaporation with low-temp low-pressure.At this moment cross valve 2 is used to change the flow direction of refrigerant.
Fig. 2 A and 2B are the schematic diagrames of the extent of opening of operating frequency and expansion valve in the startup method of the traditional convertor heat pump of explanation.The operating frequency of compressor 1 and the extent of opening of expansion valve 4 when Fig. 2 A explanation heat pump starts.The frequency work of setting with the user is at a certain temperature then carried out in being operated under the first startup frequency A and the second startup frequency B of heat pump.The phase step type increase of operating frequency prevents that liquid refrigerant from flowing into gatherer 6 when starting, and flows into compressor then, thereby prevents that liquid refrigerant from flowing into compressor.
Shown in Fig. 2 B,, when first started frequency A work, expansion valve 4 was opened according to the first expansion valve opening degree a that starts, and its first startup working time is x.When the second startup frequency B work, expansion valve 4 starts expansion valve extent of opening b according to second to be opened, and works under a frequency of setting and extent of opening, and it is determined according to a certain temperature that is set by the user after carrying out the second startup working time y.
In conventional art, stopped or damaging by the liquid refrigerant of inflow compressor when heat pump starts in order to prevent compressor, the operating frequency of compressor increases gradually.Therefore, a problem is arranged here, heating or air-conditioning when operation needs the long-time required duty that obtains.Another problem is that efficiency reduces when having worked under the frequency of setting after being operated in of heat pump finished unnecessary operation.
Therefore, an object of the present invention is to provide a kind of startup method of convertor heat pump, its when beginning to start with a frequencies operations compressor of setting so that reach the duty that the user sets as early as possible, and by change the extent of opening of multistage adjustment expansion valve according to outdoor temperature, quicken the response speed of compressor according to the temperature that the user sets, make that liquid refrigerant can not flow into compressor by gatherer when operating frequency increases sharply.
To achieve these goals, the invention provides a kind of startup method of convertor heat pump, this heat pump comprises a compressor, the indoor and outdoors heat exchanger, gatherer, expansion valve, in order to adjust indoor temperature, this method comprises: the first step, wherein compressor when beginning to start, the frequency work that increases with the temperature of setting according to the user; In second step, wherein the extent of opening of expansion valve is according to the multistage adjustment of outdoor temperature, thereby reaches the final setting extent of opening according to setpoint frequency.
For extent of opening according to expansion valve of the present invention, final setting extent of opening according to setpoint frequency realizes like this, promptly remove the setpoint frequency that reaches corresponding to user's design temperature and really promptly use the required total time of minimal openings degree retention time five equilibrium that can prevent in the liquid refrigerant inflow compressor with the minimal openings degree retention time, and based on opening retention time of above-mentioned five equilibrium according to the multistage adjustment extent of opening of the outdoor temperature of institute's foundation, up to reaching corresponding to user's design temperature and the setting extent of opening determined according to setpoint frequency.
Can make that from following detailed description other advantage of the present invention, purpose and feature are more obvious to embodiments of the invention.
With reference to the accompanying drawings embodiments of the invention are described in detail, these accompanying drawings are illustrative, but not determinate, wherein:
Fig. 1 is the schematic block diagram of traditional heat pump;
Fig. 2 A and 2B are the curve maps according to the operating frequency and the expansion valve extent of opening of the startup method of traditional convertor heat pump;
Fig. 3 A and 3B are the curve maps according to the operating frequency and the expansion valve extent of opening of the startup method of convertor heat pump of the present invention;
Fig. 4 is to use the comparative graph of suction pressure of the startup method of the present invention and conventional art;
Fig. 5 is to use the comparative graph of discharge pressure of the startup method of the present invention and conventional art.
Describe embodiments of the invention with reference to the accompanying drawings in detail.
Fig. 3 A and 3B are the curve maps according to the operating frequency and the expansion valve extent of opening of the startup method of convertor heat pump of the present invention.As shown in the figure, the frequency work when heat pump begins to start, set of a compressor with the user.Extent of opening for expansion valve 4, final setting extent of opening based on setpoint frequency obtains like this, promptly with preventing that liquid refrigerant from flowing into the required total time of minimal openings degree retention time five equilibrium in the compressor, and based on opening retention time of above-mentioned five equilibrium according to the multistage adjustment extent of opening of the outdoor temperature of institute's foundation, up to reaching corresponding to user's design temperature and the setting extent of opening determined according to setpoint frequency.
At this moment, as shown in Figure 3A, operating frequency has a slope, because need to quicken the frequency of operating frequency to obtain to set.The startup extent of opening of expansion valve is according to the multistage adjustment of outdoor temperature.
Figure 4 and 5 are to use the curve map of the comparison of the suction pressure of startup method of the present invention and conventional art and discharge pressure.Fig. 4 is the comparison of suction pressure.In conventional art, a problem is arranged, promptly after compressor passes through several seconds or tens of second between 1 beginning starting period, suction pressure reduces undesiredly, shown in the solid line of Fig. 4, because the temperature of the discharge system that is formed by condenser and compressor is lower when beginning to start, the thermal capacitance of condenser and compressor is bigger, so need the long time to increase the temperature (promptly increasing discharge pressure) of condenser.In addition, because the flow of refrigerant is directly proportional with discharge pressure and suction pressure difference, the amount of refrigerant of inflow evaporator is less in a period of time after beginning to start, when refrigerant when the outlet of condenser is gaseous state, the amount of refrigerant by expansion valve 4 inflow evaporators reduces again.
In addition, when refrigerant keeps liquid condition in the intake system that evaporimeter, suction line and gatherer are formed, around the cooling intake system, the liquid refrigerant evaporation, thus produce gaseous refrigerant.Simultaneously, when liquid refrigerant does not remain in the intake system, have only refrigerant to be provided with gaseous refrigerant by expansion valve 4 inflow evaporators.Therefore, the suction side almost becomes vacuum state, thereby suction pressure reduces rapidly.When suction pressure reduced, the flow of the suction refrigerant of compressor 1 reduced again, thereby needed the long time to increase the temperature (discharge pressure) of condensation.
As shown in Figure 4, work the back when heat pump when the setpoint frequency of 82Hz is worked at 32Hz and 52Hz, suction pressure reduces rapidly in about 3 minutes.
But among the present invention, between the beginning starting period, when the refrigerant in the evaporimeter was introduced compressor with the minimal openings degree of expansion valve 4, refrigerant was collected device 6 evaporations.The extent of opening that can be introduced into compressor with refrigerant is carried out work then.Then, along with operating frequency increases gradually, the extent of opening of expansion valve 4 increases bit by bit according to outdoor temperature, make refrigerant from the condenser inflow evaporator, thereby suction pressure does not reduce rapidly, and discharge pressure increases sharply simultaneously.
As a result, suction pressure reduces hardly, keeps enough suction pressures under setpoint frequency.
Fig. 5 is the curve map of comparison of the discharge pressure of the present invention and conventional art.In startup method according to the present invention, in about 2 minutes, reach enough discharge pressures.In traditional technology, need the long time to increase discharge pressure.As a result, when heating operation, need the long time to increase the temperature of indoor discharge air.
As mentioned above, the startup method of convertor heat pump of the present invention can be with user's setpoint frequency Operational Conversion Unit heat pump between the beginning starting period, by change multistage adjustment expansion valve extent of opening according to outdoor temperature, the temperature of setting according to the user is accelerated the response speed of compressor, thereby liquid refrigerant can not flow into compressor by gatherer when operating frequency increases sharply.
Claims (2)
1. the startup method of a convertor heat pump, this heat pump comprises a compressor, indoor and outdoors heat exchanger, gatherer, expansion valve, in order to adjust indoor air temperature, this method comprises:
The first step, wherein compressor when beginning to start, the frequency work that increases with the temperature of setting according to the user;
In second step, wherein the extent of opening of expansion valve is according to the multistage adjustment of outdoor temperature, thereby reaches the final setting extent of opening according to setpoint frequency.
2. startup method according to the convertor heat pump of claim 1, it is characterized in that, extent of opening for expansion valve, final setting extent of opening according to setpoint frequency realizes like this, promptly with preventing that liquid refrigerant from flowing into the required total time of minimal openings degree retention time five equilibrium in the compressor, and based on opening retention time of above-mentioned five equilibrium according to the multistage adjustment extent of opening of the outdoor temperature of institute's foundation, up to reaching corresponding to user's design temperature and the setting extent of opening determined according to setpoint frequency.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990019237A KR100332764B1 (en) | 1999-05-27 | 1999-05-27 | Start-up algorithm for inverter driving heat pump |
| KR19237/1999 | 1999-05-27 | ||
| KR19237/99 | 1999-05-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1275697A true CN1275697A (en) | 2000-12-06 |
| CN100400974C CN100400974C (en) | 2008-07-09 |
Family
ID=19588133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001026356A Expired - Fee Related CN100400974C (en) | 1999-05-27 | 2000-02-24 | Starting method for convertor heat pump |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2000337717A (en) |
| KR (1) | KR100332764B1 (en) |
| CN (1) | CN100400974C (en) |
| IT (1) | IT1316288B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344069A (en) * | 2013-06-26 | 2013-10-09 | 广东美的制冷设备有限公司 | Method and device for controlling electronic expansion valve |
| CN104930772A (en) * | 2015-05-14 | 2015-09-23 | 珠海格力电器股份有限公司 | Control method and device for initial opening degree of electronic expansion valve and air conditioning system |
| CN113883045A (en) * | 2021-11-22 | 2022-01-04 | 国能四川天明发电有限公司 | Method and device for controlling frequency of water taking pump |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010026846A (en) * | 1999-09-09 | 2001-04-06 | 구자홍 | Start-up method for inverter driving heat pump |
| KR100395920B1 (en) * | 2000-06-07 | 2003-08-27 | 삼성전자주식회사 | Control system for starting of air conditioner and control method thereof |
| KR100373075B1 (en) * | 2000-06-07 | 2003-02-25 | 삼성전자주식회사 | Control system for starting of air conditioner and control method thereof |
| JP3767586B2 (en) * | 2003-08-19 | 2006-04-19 | ダイキン工業株式会社 | Refrigeration equipment |
| CN104969014B (en) | 2013-01-31 | 2017-04-05 | 三菱电机株式会社 | The control method of freezing cycle device and freezing cycle device |
| JP6415612B2 (en) * | 2017-02-01 | 2018-10-31 | 三菱電機株式会社 | Refrigeration cycle equipment |
| KR101911272B1 (en) * | 2017-06-01 | 2018-12-20 | 엘지전자 주식회사 | Air conditioner and Method for controlling it |
| US10935290B2 (en) * | 2019-02-27 | 2021-03-02 | Rheem Manufacturing Company | Pressure spike prevention in heat pump systems |
| CN115235055B (en) * | 2021-04-22 | 2024-03-26 | 芜湖美智空调设备有限公司 | Air conditioner, control method thereof and computer readable storage medium |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0799288A (en) * | 1993-09-27 | 1995-04-11 | Sony Corp | Substrate bias voltage output circuit |
| JP3622817B2 (en) * | 1997-02-28 | 2005-02-23 | 株式会社富士通ゼネラル | Control method of air conditioner |
-
1999
- 1999-05-27 KR KR1019990019237A patent/KR100332764B1/en not_active IP Right Cessation
- 1999-12-10 JP JP11350997A patent/JP2000337717A/en active Pending
-
2000
- 2000-01-21 IT IT2000MI000068A patent/IT1316288B1/en active
- 2000-02-24 CN CNB001026356A patent/CN100400974C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344069A (en) * | 2013-06-26 | 2013-10-09 | 广东美的制冷设备有限公司 | Method and device for controlling electronic expansion valve |
| CN103344069B (en) * | 2013-06-26 | 2015-09-30 | 广东美的制冷设备有限公司 | The control method of electric expansion valve and device |
| CN104930772A (en) * | 2015-05-14 | 2015-09-23 | 珠海格力电器股份有限公司 | Control method and device for initial opening degree of electronic expansion valve and air conditioning system |
| CN113883045A (en) * | 2021-11-22 | 2022-01-04 | 国能四川天明发电有限公司 | Method and device for controlling frequency of water taking pump |
| CN113883045B (en) * | 2021-11-22 | 2024-06-04 | 国能四川天明发电有限公司 | Water taking pump frequency control method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000074950A (en) | 2000-12-15 |
| ITMI20000068A0 (en) | 2000-01-21 |
| JP2000337717A (en) | 2000-12-08 |
| IT1316288B1 (en) | 2003-04-10 |
| ITMI20000068A1 (en) | 2001-07-21 |
| KR100332764B1 (en) | 2002-04-17 |
| CN100400974C (en) | 2008-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1154814C (en) | Method for controlling linear expansion valve of air conditioniner having two compressor | |
| EP1347251B1 (en) | Method for increasing efficiency of a vapor compression system by evaporator heating | |
| CN100400974C (en) | Starting method for convertor heat pump | |
| CN1193199C (en) | Air conditioning system with two compressors and method for operating the same | |
| US20230106363A1 (en) | Systems and Methods for Implementing Ejector Refrigeration Cycles with Cascaded Evaporation Stages | |
| CN101454576A (en) | Turbo refrigeration device and method of controlling the same | |
| WO2024169265A1 (en) | Startup control method for cascaded refrigeration system of storage box | |
| CN2522805Y (en) | Gas-liquid separator used in heat-pump system | |
| CN1222736C (en) | Power saving control method of air conditioner | |
| CN1263990C (en) | Method for controlling refrigerating and heating of thermal pump system | |
| JP4063041B2 (en) | Control method of multi-room air conditioner | |
| CN2844802Y (en) | Automatic refrigerant adjusting system of refrigerating and heating circulation system | |
| CN1083093C (en) | Air conditioner | |
| KR100723945B1 (en) | Method for preventing freezing of air-conditioner | |
| KR20040003628A (en) | The heat pump system | |
| JP2001066007A (en) | Air conditioner | |
| CN211233428U (en) | Wide-range total heat recovery parallel refrigeration system | |
| CN114279139B (en) | Parallel double-system variable frequency refrigerator with electronic expansion valve and control method thereof | |
| KR100389640B1 (en) | System for controlling air conditioner and method thereof | |
| CN1959259A (en) | Air conditioner, and control method | |
| CN1621765A (en) | Heat pumping set with compensation throttle flow | |
| CN115615044A (en) | Heat pump system and defrosting control method thereof | |
| CN117824079A (en) | Control method, device, system and storage medium of heat pump system | |
| KR200356732Y1 (en) | The airconditioner with condenser of triple pipe sructure | |
| KR20040089323A (en) | Linear expansion valve open loophole value change method for air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| 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: 20080709 Termination date: 20120224 |