CN1637361A - Refrigerating apparatus and control method thereof - Google Patents
Refrigerating apparatus and control method thereof Download PDFInfo
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- CN1637361A CN1637361A CNA200410063856XA CN200410063856A CN1637361A CN 1637361 A CN1637361 A CN 1637361A CN A200410063856X A CNA200410063856X A CN A200410063856XA CN 200410063856 A CN200410063856 A CN 200410063856A CN 1637361 A CN1637361 A CN 1637361A
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- temperature
- compressor
- bypass duct
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Classifications
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- 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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/24—Bypassing
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- 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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
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- 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
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- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/04—Refrigeration circuit bypassing means
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- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
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- 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
- F25B2500/00—Problems to be solved
- F25B2500/06—Damage
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- 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
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
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- 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
- F25B2700/2101—Temperatures in a bypass
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- 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
- F25B2700/2105—Oil temperatures
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
A refrigerating apparatus and a control method thereof which can rapidly detect the fact that no high pressure refrigerant is introduced into an oil equalizing tube due to failure of an opening/closing value, etc., thereby being capable of preventing the flow of oil mist, and thus, preventing damage to compressors. The refrigerating apparatus includes a plurality of compressors connected in parallel in a refrigerant circuit, an oil equalizing tube adapted to connect shells of the compressors, a bypass tube adapted to connect the oil equalizing tube to a discharge refrigerant line of the compressors, and an opening/closing valve arranged at an intermediate portion of the bypass tube. The bypass tube, which is positioned between the opening/closing valve and the oil equalizing tube, is provided with a temperature sensor adapted to detect a temperature of the bypass tube itself or an internal temperature of the bypass tube.
Description
Technical field
The present invention relates to the method for refrigerating plant and control refrigerating plant, in refrigerating plant, in a plurality of low pressure shell mould compressors, carry out oily balance.
Background technology
A kind of as air-conditioning has a kind of so-called " polymorphic type " air-conditioning, and wherein a plurality of compressors are set in the outdoor unit, to handle a plurality of indoor units.
For the air-conditioning of a plurality of compressors in being arranged on outdoor unit, can use positive displacement compressor.In some cases, such compressor can have the compression case of different capabilities.
Under these circumstances, compressor is connected by oil balance tube, and oil can flow to the low-pressure side compressor from the high side compressors shell.In this case, even the level of the oil in the shell of on high-tension side compressor is lower than also continuous-flow of oil under the position of oil balance tube connector.This is only to be in the vaporific attitude when element stirs in high side compressors because oil is rotated at it.As a result, the shortage of oil may take place in the high side compressors.
In order to prevent such the flowing of mist of oil, a kind of suggestion is provided, wherein the shell of multi-compressor is communicated with by oily equalizer line, the oil equalizer line is connected to the waste side refrigerator pipes of compressor by bypass duct, as disclosed among the Japanese Patent Laid-Open Publication No.Heisei 04-222354 (claim 3 to 5 and Fig. 1).
Be arranged on oily equalizing system in the refrigerating plant in the above-mentioned publication with simple declaration herein.In refrigerating circuit, a plurality of compressors are connected to waste side refrigerator pipes and suction side refrigerator pipes, and compressor is by parallel connection like this.Each compressor comprises shell, and adjacent shell is connected by oily equalizer line.The waste side refrigerator pipes of compressor is connected to oily equalizer line by bypass duct, and described bypass duct is provided with the opened/closed valve at mid portion.
According to this oily equalizing system, the opened/closed valve is opened in common cooling operation, and the high pressure refrigerant gas is introduced in the oily equalizer line by bypass duct like this.Correspondingly, just might prevent that mist of oil from flowing between adjacent compression case by the oily equalizer line of being correlated with, and prevented the shortage of the oil in the high pressure compressor like this.
Because there is the place of outage in compressor operation in compression case for a long time, carries out so-called " oily equalization operation ".That is, compressor is by operation in tandem, one then one close with the opened/closed valve, make thus remaining oil in each compressor by sequentially feeding.Like this, the oil mass in each compression case is got back to suitable value.
But, in above-mentioned traditional refrigerating plant, carrying out common cooling operation because inefficacy waits when the opened/closed valve maintains closure state, just the high pressure refrigerant gas can not be incorporated in the oily equalizer line.Compressor operation is not having the high pressure refrigerant gas to be introduced in continued operation under the situation in the oily equalizer line, and as mentioned above, the mist of oil in the high side compressors can flow in other compressor by relevant oily equalizer line.As a result, because oil starvation may produce fault in high side compressors.That is, the fault of cheap opened/closed valve causes the fault of expensive compressor, although can be by realizing cheap normal operations with the opened/closed valve of new replacement generation fault simply in this situation.In the case, just may must replace, need quite high cost and labour like this with new compressor.
Summary of the invention
The present invention is because the problems referred to above, an aspect of of the present present invention provides a kind of refrigerating plant and can detect rapidly because the fault of opened/closed valve causes not having high-pressure refrigerant to introduce the control method of the situation of oily equalizer line, can prevent flowing of mist of oil thus, prevent from like this compressor is caused damage.
According to an aspect of the present invention, the invention provides a kind of refrigerating plant: comprise that a plurality of compressors are connected to refrigerating circuit by parallel; The oil equalizer line is used to connect the shell of compressor; Bypass duct is used for oily equalizer line is connected to the discharging refrigerator pipes of compressor; And the opened/closed valve, be placed in the mid portion of bypass duct, wherein be placed in the temperature sensor that bypass duct between opened/closed valve and the oily equalizer line is provided with the internal temperature of the temperature that is used for detection branch pipe itself or bypass duct.
According to a further aspect of the invention, the invention provides a kind of control method of controlling refrigerating plant, described refrigerating plant comprises a plurality of parallel a plurality of compressors that are connected in the refrigerating circuit, be used to connect the oily equalizer line of the shell of compressor, be used for oily equalizer line is connected to the bypass duct of the bypass duct of compressor, and the opened/closed valve that is placed in the bypass duct mid portion, described method comprises: the drive compression machine, thus by the refrigerating circuit circulating refrigerant, introduce cold-producing medium simultaneously, the compressor of described cold-producing medium in high pressure conditions is discharged in the bypass duct by refrigerator pipes; And detection branch pipe temperature inside, described bypass duct is positioned between opened/closed valve and the oily equalizer line, the perhaps temperature of bypass duct itself, and when the temperature that is detected is lower than predetermined value by calculating from the temperature of the cold-producing medium of compressor discharge, stop compressor.
In refrigerating plant of the present invention, temperature sensor is placed on the bypass duct, and described bypass duct is used for the temperature of detection branch pipe itself and the internal temperature of bypass duct.Correspondingly, when the higher pressure refrigerant gas that is introduced in by refrigerator pipes then in the bypass duct from second compressor discharge is introduced in after by the opened/closed valve in the oily equalizer line, by the corresponding high temperature of the temperature that temperature sensor detected.On the other hand, when the higher pressure refrigerant gas in being introduced in bypass duct is not passed through the opened/closed valve, by the corresponding room temperature (lower temperature) of the temperature that temperature sensor detected.Whether like this, just may detect high temperature refrigerant gas is introduced in the oily equalizer line after by the opened/closed valve.Based on the result who detects, just may prevent flowing of mist of oil effectively, to prevent owing to the shortage of oil to the damage of compressor.
Equally, according to the method for control refrigerating plant of the present invention, described compressor is driven through refrigerating circuit and comes circulating refrigerant.Equally, the higher pressure refrigerant gas that discharges from compressor is introduced in the bypass duct by refrigerator pipes.With this understanding, it is detected to be placed in the temperature of the internal temperature of the bypass duct between opened/closed valve and the oily equalizer line or bypass duct self.When the internal temperature of bypass duct was lower than the numerical value that predetermined value obtained by deducing out from the temperature of the higher pressure refrigerant gas of compressor discharge, compressor stopped.That is, when not having higher pressure refrigerant gas to pass through the opened/closed valve owing to the fault of opened/closed valve etc., compressor stops.Correspondingly, just may prevent that mist of oil from flowing, and prevents that like this first and second compressors are impaired.
Others of the present invention and/or advantage will describe in specification, and partly, can from explanation, be able to apparent, perhaps can the application of the invention and recognize.
Description of drawings
Excellent (spy) of these and other aspect of the present invention point is more obvious by what can become from following preferred embodiment and corresponding the description of the drawings, also is more readily understood, wherein:
Fig. 1 is the loop diagram according to the embodiment of refrigerating plant of the present invention; And
Fig. 2 is the flow chart according to the embodiment of the control method of refrigerating plant of the present invention.
The specific embodiment
The present invention is described in detail now with reference to accompanying drawing of the present invention, the parts that wherein similar numeral is similar.Embodiment describes by accompanying drawing.
Fig. 1 has illustrated the refrigerating circuit 2 according to refrigerating plant 1 of the present invention.Under the situation of this explanation, refrigerating plant 1 is an air-conditioning.In refrigerating circuit 2, first and second compressors the 3, the 4th, the low pressure shell mould, first heat exchanger 5, expansion valve 6, second heat exchanger 7 are settled in proper order, as shown in fig. 1.Two compressors 3,4 are connected to delivery pipe 8 and suction tube 9, and compressor is by parallel connection like this.Each discharging and absorption tube 8,9 at one end are connected to refrigerating circuit 2 by cross valve 10.Each discharging and suction tube 8,9 also are divided into two at an other end, and described pipe is connected respectively to first and second compressors 3,4 conversely.
First and second temperature sensors 14,15 and first, second compressor 3,4 are connected to control module 16 by electricity.Each temperature information that is detected by first and second temperature sensors 14,15 is sent to control module 16, and it controls first and second compressors 3,4 based on described information conversely.Particularly, when the internal temperature T of the bypass duct that is detected by first temperature sensor 14 is lower than the predetermined value A that refrigerant temperature T0 the derived institute value of acquisition by being detected from second temperature sensor 15, brake signal is sent to first and second compressors 3,4 from controlling unit 16, makes first and second compressors 3,4 be braked thus.Simultaneously, the signal of mistake is sent to guidance panel 17 from controlling unit 16, shows mistake like this.Simultaneously, consider that value A is confirmed as 10 ℃ owing to the reduction or the wrong generation of the temperature that loss caused of the heat that is taken place in the higher pressure refrigerant gas process of flowing.In the case, value A can be 0 to 20 ℃.
Now, explanation is used and is controlled the method for above-mentioned refrigerating plant 1.
At first, will operate in conjunction with cooling and be described below.Cold-producing medium is by driving first and second compressors 3,4 by refrigerant loop 2 circulations.At this moment, opened/closed valve 13 maintains in the open mode.Correspondingly, the higher pressure refrigerant gas that is discharged in the delivery pipe 8 from second compressor 4 flows into bypass duct 12.Higher pressure refrigerant gas is being introduced in the oily equalizer line 11 after by bypass duct by opened/closed valve 13 direction shown in the solid line in Fig. 1 then.The higher pressure refrigerant gas that is incorporated in the oily equalizer line 11 enters first and second compressors 3,4 then in the direction shown in the solid arrow of Fig. 1.Correspondingly, the inner sustain of oily equalizer line 11 is at higher pressure state.As a result, just can prevent that mist of oil that produced and that remain in the low-pressure state is introduced in the oily equalizer line 11 in first and second compressors 3,4.
Equally, in the cooling operating process, detect opened/closed valve 13 and whether be in suitable open mode.Based on testing result, refrigerating plant is controlled.This will be elaborated by Fig. 2.At first, the internal temperature T that is placed in the bypass duct 12 between opened/closed valve 13 and the oily equalizer line 11 detects by first temperature sensor 14.Equally, the internal temperature of delivery pipe 8 is measured by second temperature sensor 15.Like this, the temperature T 0 from first and second compressors 3,4 high-pressure refrigerants that discharged just can detect.Temperature information T that is detected and T0 are sent in the control module 16, and described control module 16 determines conversely whether the internal temperature T of bypass duct 12 is lower than by temperature T 0 value that predetermined value A is obtained that detects from higher pressure refrigerant gas.When definite this temperature T was lower than the predetermined value A that is derived by temperature T 0, control module 16 stopped first and second compressors 3,4.On the other hand, when temperature T was lower than the predetermined value A that is derived by temperature T 0, first and second compressors 3,4 were operated to carry out cooling by continued operation.
Now, oily equalization operation will be described.At first, opened/closed valve 13 closures, second compressor 4 stops.With this understanding, first compressor 3 is driven.When first compressor 3 was driven, the inside of the shell of first compressor 3 was in low-pressure state.Correspondingly, in first compressor 3 more than oil flow in the shell of second compressor 4 by oily equalizer line 11.Then, opened/closed valve 13 is closed, and first compressor 3 is stopped then.With this understanding, second compressor 4 is driven.When second compressor 4 was driven, the inside of the shell of second compressor 4 was in low-pressure state.Correspondingly, in the shell of second compressor 4 more than oil flow in the shell of first compressor 3 by oily equalizer line 11.Like this, the oil mass in each shell of first and second compressors can be according to first and second compressors, 3,4 aforesaid driven and equilibrium.
In above-mentioned refrigerating plant 1, first temperature sensor 14 is placed on the bypass duct 12, and bypass duct 12 is positioned between opened/closed valve 13 and the oily equalizer line 11 internal temperature with detection branch pipe 12.Correspondingly, by opened/closed valve 13 after, be introduced into oily equalizer line 11 by delivery pipe 8 through the higher pressure refrigerant gas that opened/closed valves 13 are introduced into bypass duct 12 then by the discharging of second compressor 4, the temperature correspondence high temperature that is detected by first temperature sensor 14.On the other hand, when the higher pressure refrigerant gas of introducing bypass duct 12 by opened/closed valve 13, the corresponding room temperature (low temperature) of temperature T that is detected by first temperature sensor 14.Whether like this, just may detect high temperature refrigerant gas introduces after by opened/closed valve 13 in the oily equalizer line 11.Based on the structure that detects, just can prevent reliably that mist of oil from flowing, and like this, prevents that first and second compressors 3,4 are owing to oil starvation is damaged.
Equally, second temperature sensor 15 is positioned on the delivery pipe 8, so just may be relatively from the temperature T 0 of first and second compressors 3,4 higher pressure refrigerant gas that discharged and the temperature T that is detected by first temperature sensor 14.Correspondingly, just may detect the state of opening the suitable amount that the higher pressure refrigerant gas that causes can not be by opened/closed valve 13 owing to opened/closed valve 13 improper.
According to the method for control refrigerating plant 1, first and second compressors 3,4 are driven through refrigerating circuit 2 circulating refrigerants.Equally, the high-pressure refrigerant from second compressor discharge is introduced in bypass duct 12 by delivery pipe 8.With this understanding, being placed in the internal temperature T of the bypass duct 12 between opened/closed valve 13 and the oily equalizer line 11 can be detected.When the internal temperature T of bypass duct 12 was lower than the value that obtains by the predetermined value A that is derived from the temperature T 0 of first and second compressors 3,4 higher pressure refrigerant gas that discharged, first and second compressors 3,4 were braked.That is, when not having higher pressure refrigerant gas to pass through opened/closed valve 13 owing to the fault of opened/closed valve 13, first and second compressors 3,4 are stopped.Correspondingly, just may prevent flowing of mist of oil, like this, prevent that first and second compressors 3,4 are impaired.
Although be shown and be illustrated according to refrigerating plant of the present invention and control method, be not limited to the foregoing description with reference to embodiment.Those of ordinary skill is appreciated that under the situation that does not deviate from principle of the present invention and spirit and can makes amendment to it.For example, although the internal temperature of bypass duct 12 detects by first temperature sensor 14 in the illustrated embodiment, also can detect the refrigerant gas bypass duct 12 of whether flowing through by the temperature of detection branch pipe 12 self, and according to the present invention, based on the temperature that is detected, estimate the internal temperature of bypass duct 12.
Equally, although the internal temperature T by bypass duct 12 relatively and detect the high temperature refrigerant gas bypass duct 12 of whether flowing through from the temperature T 0 of first and second compressors 3,4 refrigerant gas that discharged in the above-described embodiments also might be by relatively the internal temperature T and the predetermined value according to the present invention of bypass duct 12 detect the high temperature refrigerant gas flow.In the case, predetermined value is the desired typical maximum temperature when not having the high temperature refrigerant gas flow.For example, this value can be set to 50 ℃.In the case, compressor is stopped during less than 50 ℃ in common cooling operating process at the internal temperature T of bypass duct 12.
Although two compressors, promptly compressor 3,4 is set in the refrigerating plant 1 of illustrated embodiment, and the present invention can implement under the situation that at least three compressors are provided.Equally, be that the embodiment of air-conditioning is illustrated although the present invention combines refrigerating plant 1 wherein, also can be applied to refrigerator, reezer system or other refrigerating plant.
Claims (2)
1. refrigerating plant: comprise that a plurality of compressors are connected to refrigerating circuit by parallel; The oil equalizer line is used to connect the shell of compressor; Bypass duct is used for oily equalizer line is connected to the discharging refrigerator pipes of compressor; And the opened/closed valve, be placed in the mid portion of bypass duct,
Wherein be placed in bypass duct between opened/closed valve and the oily equalizer line and be provided with the temperature sensor of the internal temperature of the temperature that is used for detection branch pipe itself or bypass duct.
2. control method of controlling refrigerating plant, described refrigerating plant comprises a plurality of parallel a plurality of compressors that are connected in the refrigerating circuit, be used to connect the oily equalizer line of the shell of compressor, be used for oily equalizer line is connected to the bypass duct of the discharging refrigerator pipes of compressor, and the opened/closed valve that is placed in the bypass duct mid portion, described method comprises:
The drive compression machine thus by the refrigerating circuit circulating refrigerant, is introduced cold-producing medium simultaneously, and the compressor of described cold-producing medium in high pressure conditions is discharged in the bypass duct by refrigerator pipes; And
The internal temperature of detection branch pipe, described bypass duct is positioned between opened/closed valve and the oily equalizer line, the perhaps temperature of detection branch pipe itself, and when the temperature that is detected is lower than predetermined value by calculating from the temperature of the cold-producing medium of compressor discharge, stop compressor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003427025A JP3946191B2 (en) | 2003-12-24 | 2003-12-24 | Refrigeration apparatus and control method of refrigeration apparatus |
| JP2003427025 | 2003-12-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1637361A true CN1637361A (en) | 2005-07-13 |
| CN1313782C CN1313782C (en) | 2007-05-02 |
Family
ID=34544964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410063856XA Expired - Fee Related CN1313782C (en) | 2003-12-24 | 2004-07-13 | Refrigerating apparatus and control method thereof |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1548379B1 (en) |
| JP (1) | JP3946191B2 (en) |
| KR (1) | KR100539593B1 (en) |
| CN (1) | CN1313782C (en) |
| DE (1) | DE602004009027T2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100570238C (en) * | 2005-08-26 | 2009-12-16 | 三菱电机株式会社 | Refrigerating air-conditioning |
| CN105387559A (en) * | 2015-10-28 | 2016-03-09 | 珠海格力电器股份有限公司 | Air conditioner and valve state detection method and device thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100592955B1 (en) * | 2005-01-10 | 2006-06-26 | 삼성전자주식회사 | Refrigerating system and control method for the same |
| DE102005042926B4 (en) * | 2005-09-08 | 2015-02-05 | Krones Aktiengesellschaft | Method and device for controlling and regulating a hollow body manufacturing unit |
| JP4720538B2 (en) * | 2006-02-27 | 2011-07-13 | パナソニック株式会社 | Cooling and heating system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH04222354A (en) * | 1990-12-21 | 1992-08-12 | Daikin Ind Ltd | Operation controller for refrigerating equipment |
| US5634345A (en) * | 1995-06-06 | 1997-06-03 | Alsenz; Richard H. | Oil monitoring system |
| EP0838640A3 (en) * | 1996-10-28 | 1998-06-17 | Matsushita Refrigeration Company | Oil level equalizing system for plural compressors |
| CN1188218A (en) * | 1996-10-28 | 1998-07-22 | 松下冷机株式会社 | Oil level equalizing system for plural compressors |
| TWI237682B (en) * | 2000-07-07 | 2005-08-11 | Sanyo Electric Co | Freezing apparatus |
| CN2447696Y (en) * | 2000-10-17 | 2001-09-12 | 江苏春兰电器有限公司 | Double-compressor oil-level balancing device |
| JP3750520B2 (en) * | 2000-12-08 | 2006-03-01 | ダイキン工業株式会社 | Refrigeration equipment |
| KR100388675B1 (en) * | 2000-12-18 | 2003-06-25 | 삼성전자주식회사 | Air conditioner having pressure controlling unit and its control method |
| JP2002242833A (en) * | 2001-02-15 | 2002-08-28 | Toshiba Kyaria Kk | Refrigerating cycle device |
| US6718781B2 (en) * | 2001-07-11 | 2004-04-13 | Thermo King Corporation | Refrigeration unit apparatus and method |
| DE20115270U1 (en) * | 2001-09-15 | 2001-11-22 | Teko Ges Fuer Kaeltetechnik Mb | Cooling system and associated circuitry |
| CN100565038C (en) * | 2002-04-08 | 2009-12-02 | 大金工业株式会社 | Refrigerating plant |
-
2003
- 2003-12-24 JP JP2003427025A patent/JP3946191B2/en not_active Expired - Fee Related
-
2004
- 2004-07-08 KR KR10-2004-0053091A patent/KR100539593B1/en active IP Right Grant
- 2004-07-13 CN CNB200410063856XA patent/CN1313782C/en not_active Expired - Fee Related
- 2004-07-15 DE DE602004009027T patent/DE602004009027T2/en not_active Expired - Lifetime
- 2004-07-15 EP EP04254258A patent/EP1548379B1/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100570238C (en) * | 2005-08-26 | 2009-12-16 | 三菱电机株式会社 | Refrigerating air-conditioning |
| CN105387559A (en) * | 2015-10-28 | 2016-03-09 | 珠海格力电器股份有限公司 | Air conditioner and valve state detection method and device thereof |
| CN105387559B (en) * | 2015-10-28 | 2018-04-13 | 珠海格力电器股份有限公司 | Air conditioner and valve state detection method and device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005188771A (en) | 2005-07-14 |
| EP1548379A1 (en) | 2005-06-29 |
| DE602004009027T2 (en) | 2008-06-19 |
| EP1548379B1 (en) | 2007-09-19 |
| KR20050065256A (en) | 2005-06-29 |
| JP3946191B2 (en) | 2007-07-18 |
| CN1313782C (en) | 2007-05-02 |
| KR100539593B1 (en) | 2005-12-29 |
| DE602004009027D1 (en) | 2007-10-31 |
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