CN1967073B - Combined air conditioner with engine oil reclaiming operation time point computing function and method therefor - Google Patents
Combined air conditioner with engine oil reclaiming operation time point computing function and method therefor Download PDFInfo
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- CN1967073B CN1967073B CN200510016149XA CN200510016149A CN1967073B CN 1967073 B CN1967073 B CN 1967073B CN 200510016149X A CN200510016149X A CN 200510016149XA CN 200510016149 A CN200510016149 A CN 200510016149A CN 1967073 B CN1967073 B CN 1967073B
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Abstract
The composite air conditioner with oil recovery operation timing calculation function comprises a temperature sensor to inspect the fluid temperature inside the each compressor, the oil recovery operation timing calculation section comparing the checked out temperature and the preset temperature to perform the calculation. It can prevent the damage to fittings resulted from shortage of oil, preventing the reduction of system efficiency due to unnecessary return of oil.
Description
Technical field
Point calculating method when the present invention relates to have the machine oil reclaimer operation of the combined air conditioner of machine oil reclaimer operation time point computing function and combined air conditioner, in the present invention, the time point of machine oil deficiency carries out the machine oil reclaimer operation in compressor, thereby can prevent the accessory damage that causes owing to machine oil is not enough, and can prevent the phenomenon of the system effectiveness reduction that causes owing to unnecessary machine oil reclaimer operation.
Background technology
Air-conditioner is a kind of temperature, humidity, air-flow and pure and fresh degree of adjustable air, and makes indoor environment keep the device of comfort conditions.Above-mentioned air-conditioner can be divided into integral air conditioner and detachable air conditioner according to the structure of its unit (unit).Wherein, above-mentioned integral air conditioner accommodates indoor set and off-premises station in single shell; Above-mentioned detachable air conditioner as off-premises station, and is separated from each other formation with evaporimeter as indoor set with compressor and condenser.
Also include heating and cooling two-purpose air conditioner in the above-mentioned air-conditioner, be provided with the flow channel switching valve door in the above-mentioned heating and cooling two-purpose air conditioner, the stream of changeable refrigerant, and selectivity is carried out refrigeration and system heating function.In addition, also release the combined air conditioner that is provided with a plurality of indoor sets recently, above-mentioned combined air conditioner can freeze or make warm operation in each indoor space.In above-mentioned combined air conditioner,, a plurality of off-premises stations that are respectively arranged with compressor connection parallel with one another is used in order to tackle the operating load of indoor set preferably.
Fig. 1 is the schematic diagram of the off-premises station structure of combined air conditioner of the prior art.As shown in the figure, be provided with the 1st in the combined air conditioner to n off-premises station (11a～11n), and a plurality of indoor sets not shown in the figures.
Above-mentioned each off-premises station (is respectively arranged with among the 11a～11n): be used for a pair of compressor of compression refrigerant, i.e. the 1st compressor 13a and the 2nd compressor 13b; Be used to switch the cubic valve 21 of the stream of refrigerant; Make refrigerant and extraneous air carry out the outdoor heat converter 25 of heat exchange; Be used for providing the shared fluid reservoir (accumulator) 27 of the refrigerant of gaseous state to above-mentioned the 1st compressor 13a and the 2nd compressor 13b.
Be respectively arranged with the discharge pipe 15 that is used to discharge refrigerant in the upper area of above-mentioned the 1st compressor 13a and the 2nd compressor 13b, be combined with suction line 17 in the lower region thereof respectively, one side of above-mentioned suction line 17 is connected to above-mentioned shared fluid reservoir 27, and can suck refrigerant.In addition, what be interconnected between above-mentioned the 1st compressor 13a and the 2nd compressor 13b is connected with oil equalizing pipe 19, thereby the machine oil of above-mentioned the 1st compressor 13a and the 2nd compressor 13b inside is flowed.
The discharge side of above-mentioned each compressor is respectively arranged with lubricant separator 31 and check-valves (check valve) 33, and, be formed with machine oil in above-mentioned each lubricant separator 31 and return stream 35, thereby machine oil can be returned to the suction side of each compressor.
The downstream side of above-mentioned each check-valves 33 is provided with the cubic valve 21 that is used to switch refrigerant flow, be connected with outdoor heat exchanger 25 on the port of above-mentioned cubic valve 21, be connected with above-mentioned shared fluid reservoir 27 on another port of above-mentioned cubic valve 21, also have an end that then is connected with the connecting pipings 41 that connects to indoor pusher side on the port.
Be provided with receiver (receiver) 37 in a side of outdoor heat exchanger 25 along the flow direction of refrigerant, one side of above-mentioned receiver 37 and a side of connecting pipings 41 are respectively arranged with service valve (service valve) 43a, 43b, and (the main refrigerant pipe 45 of 11a～11n) connects the side of above-mentioned each service valve 43a, 43b with being connected above-mentioned each off-premises station respectively.
According to aforesaid structure, as above-mentioned compressor 13a, when 13b drives, the refrigerant of above-mentioned compressor 13a, 13b inside will together be discharged with the refrigerant of compression, part in above-mentioned and the machine oil that refrigerant is together discharged will be separated from refrigerant by lubricant separator 31, and will return the inside that stream 35 turns back to above-mentioned compressor 13a, 13b along said engine oil, its another part then together is circulated in the inside of freezing cycle device with refrigerant.
In addition, drive a part of indoor set in the above-mentioned whole indoor set, for example: only driving has 1 to the situation of the small loading of several indoor sets, when indoor set drives for a long time, above-mentioned machine oil of together discharging with the refrigerant of compression can't turn back to above-mentioned compressor 13a, 13b, but come together in coolant piping and/or the indoor set, thereby cause the phenomenon of the inside machine oil deficiency of above-mentioned compressor 13a, 13b.In order to prevent the phenomenon of the inner machine oil deficiency of above-mentioned compressor 13a, 13b, make at interval with certain hour under the state of indoor set shut-down operation, after opening the expansion gear of above-mentioned each indoor set, make above-mentioned each compressor 13a, 13b drive the set time simultaneously, carry out the machine oil reclaimer operation, thereby will come together in the inside that machine oil in coolant piping and the indoor set is recovered to above-mentioned compressor 13a, 13b.
But, in the combined air conditioner of above-mentioned prior art, will carry out the machine oil reclaimer operation at a certain time interval, thereby make machine oil be recovered to whole off-premises station (among each compressor 13a, 13b of 11a～11n).Therefore, under the state of no show machine oil reclaimer operation time point,, may cause producing spark in the driving accessory of above-mentioned each compressor 13a, 13b, and sustain damage if when the situation of machine oil deficiency of a part of compressor 13a, 13b inside takes place.In order to prevent above-mentioned situation, and reduce the machine oil reclaimer operation at interval the time, the machine oil reclaimer operation will frequently be carried out, thereby cause to successfully manage load, and reduce the operating efficiency of whole system thus.
Summary of the invention
In order to solve above-mentioned problems of the prior art, point calculating method when the object of the present invention is to provide the machine oil reclaimer operation of a kind of combined air conditioner with machine oil reclaimer operation time point computing function and combined air conditioner, the time point of machine oil deficiency carries out the machine oil reclaimer operation in compressor, thereby can prevent the accessory damage that causes owing to machine oil is not enough, and can prevent the phenomenon of the system effectiveness reduction that causes owing to unnecessary machine oil reclaimer operation.
In order to achieve the above object, the combined air conditioner with machine oil reclaimer operation time point computing function among the present invention is characterized in that, includes following several sections: temperature sensor, and it is used for detecting the temperature of each compressor fluid of combined air conditioner; Machine oil reclaimer operation time point calculating part, it is relatively by detected temperature of above-mentioned each temperature sensor and design temperature, and calculates machine oil reclaimer operation time point.
Wherein, the present invention is characterized in that: when at least one temperature in the above-mentioned detected temperature is above-mentioned design temperature when following, said engine oil reclaimer operation time point calculating part will judge that it is machine oil reclaimer operation time point.
And, the present invention is characterized in that: for the machine oil that makes above-mentioned compressor inside flows mutually, also include oil equalizing pipe among the present invention, above-mentioned oil equalizing pipe is used to make close compressor to connect with being interconnected, and above-mentioned each temperature sensor will be installed on the both ends of above-mentioned oil equalizing pipe respectively.
And, the present invention is characterized in that: also include control part among the present invention, according to said engine oil reclaimer operation time point calculating part result calculated, when arriving said engine oil reclaimer operation time point, for the machine oil in the freeze cycle is recovered in the above-mentioned compressor, at least one compressor that above-mentioned control part will be controlled in each off-premises station is operated simultaneously with set speed.
In addition, in order to achieve the above object, point calculating method during the machine oil reclaimer operation of the combined air conditioner among the present invention is characterized in that, includes following several steps: the step that detects the internal flow temperature of each compressor in a plurality of off-premises stations; The detected temperatures of more above-mentioned each compressor and the step of design temperature; In the detected temperatures of above-mentioned each compressor,, it is judged as the step of machine oil reclaimer operation time point when one of them detected temperatures is above-mentioned design temperature when following.
The present invention has following effect, that is: the time point of machine oil deficiency carries out the machine oil reclaimer operation in compressor, thereby can prevent the accessory damage that causes owing to machine oil is not enough, and can prevent the phenomenon of the system effectiveness reduction that causes owing to unnecessary machine oil reclaimer operation.
And, the present invention has following effect, that is, the time point of machine oil deficiency carries out the machine oil reclaimer operation in compressor, thereby can prevent the accessory damage that causes owing to machine oil is not enough, and can prevent the phenomenon of the system effectiveness reduction that causes owing to unnecessary machine oil reclaimer operation.
Description of drawings
Fig. 1 is the schematic diagram of the off-premises station structure of combined air conditioner of the prior art;
Fig. 2 is the schematic diagram of the off-premises station structure of the combined air conditioner with machine oil reclaimer operation time point computing function in one embodiment of the invention;
Fig. 3 is the controlling party block diagram of Fig. 2;
Fig. 4 is the schematic diagram of the relation of operating time of the compressor among Fig. 2 and internal flow temperature.
The critical piece description of reference numerals
11a: the 1st off-premises station 11n: n off-premises station
13a: the 1st compressor 13b: the 2nd compressor
19: oil equalizing pipe 51a: the 1st temperature sensor
51b: the 2nd temperature sensor 53: machine oil reclaimer operation time point calculating part
55: control part
The specific embodiment
Below, with reference to the accompanying drawings, the present invention will be described in detail.
Fig. 2 is the schematic diagram of the off-premises station structure of the combined air conditioner with machine oil reclaimer operation time point computing function in one embodiment of the invention; Fig. 3 is the controlling party block diagram of Fig. 2; Fig. 4 is the schematic diagram of the relation of operating time of the compressor among Fig. 2 and internal flow temperature.Among the figure, the present invention will be described for convenience, and the part identical and similar with preceding addressing illustrated structure will be given identical drawing symbol and be described.As shown in the figure, the combined air conditioner among the present invention with machine oil reclaimer operation time point computing function, it includes following several sections: temperature sensor 51a, 51b, it is used for detecting the fluid temperature (F.T.) of each compressor 13a, 13b of combined air conditioner; Machine oil reclaimer operation time point calculating part 53, testing result and the design temperature of its more above-mentioned each temperature sensor 51a, 51b, and calculate machine oil reclaimer operation time point; Control part 55, it is according to the result of calculation of said engine oil reclaimer operation time point calculating part 53, when arriving machine oil reclaimer operation time point, will control above-mentioned each off-premises station (among the 11a～11n) respectively at least one compressor 13a, 13b drive simultaneously.
Above-mentioned each off-premises station (is respectively arranged with among the 11a～11n): be used for a pair of compressor of compression refrigerant, i.e. the 1st compressor 13a and the 2nd compressor 13b; Be used to switch the cubic valve 21 of the stream of refrigerant; Make refrigerant and extraneous air carry out the outdoor heat converter 25 of heat exchange; Be used for providing the shared fluid reservoir (accumulator) 27 of the refrigerant of gaseous state to above-mentioned the 1st compressor 13a and the 2nd compressor 13b.
Be respectively arranged with the discharge pipe 15 that is used to discharge refrigerant in the upper area of above-mentioned the 1st compressor 13a and the 2nd compressor 13b, be combined with suction line 17 in the lower region thereof respectively, one side of above-mentioned suction line 17 is connected to above-mentioned shared fluid reservoir 27, and can suck refrigerant.
The discharge side of above-mentioned each compressor is respectively arranged with lubricant separator 31 and check-valves (check valve) 33, and, be formed with machine oil in above-mentioned each lubricant separator 31 and return stream 35, thereby machine oil can be returned to the suction side of each compressor.
The downstream side of above-mentioned each check-valves 33 is provided with the cubic valve 21 that is used to switch refrigerant flow, be connected with outdoor heat exchanger 25 on the port of above-mentioned cubic valve 21, be connected with above-mentioned shared fluid reservoir 27 on another port of above-mentioned cubic valve 21, also have an end that then is connected with the connecting pipings 41 that connects to indoor pusher side on the port.
Be provided with receiver (receiver) 37 in a side of outdoor heat exchanger 25 along the flow direction of refrigerant, one side of above-mentioned receiver 37 and a side of connecting pipings 41 are respectively arranged with service valve (service valve) 43a, 43b, and (the main refrigerant pipe 45 of 11a～11n) connects the side of above-mentioned each service valve 43a, 43b with being connected above-mentioned each off-premises station respectively.
In addition, (what be interconnected between the 1st compressor 13a among the 11a～11n) and the 2nd compressor 13b is connected with oil equalizing pipe 19 to above-mentioned each off-premises station, thereby the machine oil of above-mentioned the 1st compressor 13a and the 2nd compressor 13b inside is flowed.And, length direction along above-mentioned oil equalizing pipe 19, be combined with the 1st temperature sensor 51a and the 2nd temperature sensor 51b on the both side ends zone of above-mentioned oil equalizing pipe 19 respectively, above-mentioned the 1st temperature sensor 51a and the 2nd temperature sensor 51b are used to detect the temperature of the internal flow of the compressor 13a, the 13b that combine with above-mentioned each end.
Above-mentioned control part 55 is by the morphosises such as microcomputer of built-in control program, be connected with the lower part with above-mentioned control part 55 circuit: machine oil reclaimer operation time point calculating part 53, it is used for detecting each off-premises station (temperature of 11a～the 1st compressor 13a 11n) and the internal flow of the 2nd compressor 13b, and calculate machine oil reclaimer operation time point, when arriving said engine oil reclaimer operation time point, control above-mentioned each compressor 13a, 13b and carry out the machine oil reclaimer operation; The 1st temperature sensor 51a and the 2nd temperature sensor 51b, it is used for detecting above-mentioned each off-premises station (11a～ compressor 13a 11n), the temperature of 13b; Each off-premises station (the 1st compressor 13a and the 2nd compressor 13b of 11a～11n).
And at above-mentioned compressor 13a, when 13b drives, refrigerant and the machine oil that has gaseous state will be mixed in the inside of above-mentioned compressor 13a, 13b, and have set pressure and temperature.When with the refrigerant one of above-mentioned compression in the same way under the situation of the outside of compressor 13a, the 13b oil level of discharging more than the oil level that together flows into the refrigerant that flows into by suction line 17, if when the inside oil level of above-mentioned compressor 13a, 13b reduces, the internal pressure of above-mentioned compressor 13a, 13b will diminish.Through after certain operating time, when machine oil flows out from above-mentioned each compressor 13a, 13b, and when reducing the internal pressure of above-mentioned compressor 13a, 13b, as shown in Figure 4, the temperature of above-mentioned compressor 13a, 13b will reduce gradually.At this moment, with the temperature of the minimum oil level correspondence in the inside of above-mentioned compressor 13a, 13b as design temperature, and detect the internal flow temperature of above-mentioned each compressor 13a, 13b, and be design temperature when following in above-mentioned detected temperature, will carry out the said engine oil reclaimer operation.
According to aforesaid structure, when indoor set begins to operate, and when driving above-mentioned compressor 13a, 13b, will be by each off-premises station (temperature that the 1st temperature sensor 51a of 11a～11n) and the 2nd temperature sensor 51b detect the internal flow of above-mentioned compressor 13a, 13b.Simultaneously, said engine oil reclaimer operation time point calculating part 53 will more above-mentioned each off-premises station (the 1st temperature sensor 51a and detected temperature of the 2nd temperature sensor 51b and the design temperature of 11a～11n), (at least one temperature is under the situation below the design temperature in the 1st temperature sensor 51a of 11a～11n) and the detected temperature of the 2nd temperature sensor 51b, and it is judged as machine oil reclaimer operation time point at above-mentioned each off-premises station.Be judged as under the situation of machine oil reclaimer operation time point by said engine oil reclaimer operation time point calculating part 53, above-mentioned control part 55 will make the expansion gear of each indoor set not shown in the figures all open, and control makes above-mentioned each off-premises station, and (each drives compressor 13a, a 13b at least among the 11a～11n), thereby the machine oil that compiles in coolant piping and the indoor set is recovered among above-mentioned compressor 13a, the 13b.
More than be illustrated at the preferred embodiment among the present invention, preceding addressing in the illustrated embodiment, each off-premises station all has the 1st compressor and the 2nd compressor, but also can be according to the characteristic of outdoor unit, and its structure is carried out suitable change.
Claims (7)
1. the combined air conditioner with machine oil reclaimer operation time point computing function is characterized in that, comprising:
Temperature sensor (51a, 51b) is used for detecting the temperature of each compressor (13a, 13b) inner fluid of combined air conditioner;
Machine oil reclaimer operation time point calculating part (53) relatively by above-mentioned each temperature sensor (51a, 51b) detected temperature and design temperature, and calculates machine oil reclaimer operation time point.
2. the combined air conditioner with machine oil reclaimer operation time point computing function according to claim 1 is characterized in that:
When at least one temperature in the above-mentioned detected temperature is above-mentioned design temperature when following, said engine oil reclaimer operation time point calculating part (53) will judge that it is machine oil reclaimer operation time point.
3. the combined air conditioner with machine oil reclaimer operation time point computing function according to claim 1 is characterized in that:
Also include oil equalizing pipe (19), close compressor is connected with being interconnected, the inner machine oil of above-mentioned compressor (13a, 13b) is flowed mutually, above-mentioned each temperature sensor (51a, 51b) will be installed on the both ends of above-mentioned oil equalizing pipe (19) respectively.
4. according to any described combined air conditioner in the claim 1 to 3, it is characterized in that with machine oil reclaimer operation time point computing function:
Also include control part (55), in said engine oil reclaimer operation time point calculating part (53) result calculated, when arriving said engine oil reclaimer operation time point, for the machine oil in the freeze cycle is recovered in the above-mentioned compressor (13a, 13b), each at least one compressor (13a, 13b) that above-mentioned control part (55) will be controlled in each off-premises station is operated simultaneously with set speed.
5. the combined air conditioner with machine oil reclaimer operation time point computing function according to claim 1 is characterized in that:
The temperature of compressor (13a, the 13b) internal flow of correspondence is a design temperature during the inner minimum oil level of compressor (13a, 13b).
6. point calculating method during the machine oil reclaimer operation of a combined air conditioner comprises:
Detect the step of the internal flow temperature of each compressor (13a, 13b) in a plurality of off-premises stations;
The detected temperatures of more above-mentioned each compressor (13a, 13b) and the step of design temperature;
In the detected temperatures of above-mentioned each compressor (13a, 13b),, it is judged as the step of machine oil reclaimer operation time point when one of them detected temperatures is above-mentioned design temperature when following.
7. point calculating method during the machine oil reclaimer operation of combined air conditioner according to claim 6 is characterized in that:
The temperature of compressor (13a, the 13b) internal flow of correspondence is set at design temperature during with the inner minimum oil level of compressor (13a, 13b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510016149XA CN1967073B (en) | 2005-11-18 | 2005-11-18 | Combined air conditioner with engine oil reclaiming operation time point computing function and method therefor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510016149XA CN1967073B (en) | 2005-11-18 | 2005-11-18 | Combined air conditioner with engine oil reclaiming operation time point computing function and method therefor |
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| Publication Number | Publication Date |
|---|---|
| CN1967073A CN1967073A (en) | 2007-05-23 |
| CN1967073B true CN1967073B (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200510016149XA Expired - Fee Related CN1967073B (en) | 2005-11-18 | 2005-11-18 | Combined air conditioner with engine oil reclaiming operation time point computing function and method therefor |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1187608A (en) * | 1996-12-12 | 1998-07-15 | 三洋电机株式会社 | Method for recovering refrigerator oil of air-conditioner |
| US6125642A (en) * | 1999-07-13 | 2000-10-03 | Sporlan Valve Company | Oil level control system |
| CN1605818A (en) * | 2003-10-10 | 2005-04-13 | Lg电子株式会社 | Apparatus and method for controlling oil of air conditioner |
-
2005
- 2005-11-18 CN CN200510016149XA patent/CN1967073B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1187608A (en) * | 1996-12-12 | 1998-07-15 | 三洋电机株式会社 | Method for recovering refrigerator oil of air-conditioner |
| US6125642A (en) * | 1999-07-13 | 2000-10-03 | Sporlan Valve Company | Oil level control system |
| CN1605818A (en) * | 2003-10-10 | 2005-04-13 | Lg电子株式会社 | Apparatus and method for controlling oil of air conditioner |
Non-Patent Citations (2)
| Title |
|---|
| JP平8-200856A 1996.08.06 |
| KR 2002-0000671 A,全文. |
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Granted publication date: 20101006 Termination date: 20101118 |