CN101865570A - Two-stage oil return type air conditioning heat pump system - Google Patents
Two-stage oil return type air conditioning heat pump system Download PDFInfo
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- CN101865570A CN101865570A CN 201010199165 CN201010199165A CN101865570A CN 101865570 A CN101865570 A CN 101865570A CN 201010199165 CN201010199165 CN 201010199165 CN 201010199165 A CN201010199165 A CN 201010199165A CN 101865570 A CN101865570 A CN 101865570A
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Abstract
The invention relates to a two-stage oil return type air conditioning heat pump system, comprising a compressor, a first-stage oil separator, a four-way valve, a condenser, an outdoor machine electronic expansion valve, a high-pressure liquid-storing tank, a high-pressure stop valve, more than one indoor shunt electronic expansion valve, more than one evaporator and a low-pressure liquid-storing tank, wherein an exhaust port of the compressor, the first-stage oil separator, the four-way valve, the condenser, the outdoor machine electronic expansion valve, the high-pressure liquid-storing tank, the high-pressure stop valve, the indoor shunt electronic expansion valve and the evaporator are communicated in sequence; the other end of the evaporator is communicated with a third interface of the four-way valve; a fourth interface of the four-way valve is communicated with an air return port of the compressor by the low-pressure liquid-storing tank; a pipeline between the first-stage oil separator and the four-way valve is serially connected with a second-stage oil separator; and the first-stage oil separator and the second-stage oil separator are respectively communicated with a main oil return capillary tube by a first-stage oil return capillary tube and a second-stage oil return capillary tube, and the main oil return capillary tube is communicated with the air return port of the compressor. The two-stage oil return type air conditioning heat pump system can ensure good lubrication of the compressor when using an overlength piping.
Description
Technical field
The present invention relates to a kind of two-stage oil return type air conditioning heat pump system, belong to the improvement technology of air conditioner heat pump system.
Background technology
Traditional combined air conditioners heat pump is made up of parts such as compressor, oil eliminator, cross valve, condenser, electric expansion valve, high pressure fluid reservoir, evaporimeter, low-pressure liquid storing tanks, there is following problem easily in the combined air conditioners heat pump of said structure: because there are problems such as pressure decay and oil return difficulty in the refrigerant in the system in long pipe arrangement, during user installation, in the time of must using long pipe arrangement because of the installation site relation, can make the compressor oil insufficient lubrication in the system, influence product reliability.
Summary of the invention
The objective of the invention is to consider the problems referred to above and can guarantee that also compressor oil is lubricated good when a kind of use overlength pipe arrangement is provided that properties of product are reliable, enlarge the two-stage oil return type air conditioning heat pump system of range of application.
Technical scheme of the present invention is: a kind of two-stage oil return type air conditioning heat pump system, comprise compressor, first order oil eliminator, cross valve, condenser, off-premises station electronics expansion valve, the high pressure fluid reservoir, high-pressure stop valve, an above indoor set shunting electronics expansion valve, above evaporimeter and low-pressure liquid storing tank, the exhaust outlet of compressor wherein, first order oil eliminator, cross valve, condenser, off-premises station electronics expansion valve, the high pressure fluid reservoir, high-pressure stop valve, indoor set shunting electronics expansion valve and evaporimeter are communicated with successively, the other end of evaporimeter is communicated with the 3rd interface of cross valve, the 4th interface of cross valve is communicated with the return-air mouth of compressor by low-pressure liquid storing tank, it is characterized in that being serially connected with second level oil eliminator on the pipeline between described first order oil eliminator and the cross valve, first order oil eliminator and second level oil eliminator are communicated with total oil return capillary by first order oil return capillary and second level oil return capillary respectively, and total oil return capillary is communicated with the return-air mouth of compressor.
Above-mentioned first order oil return capillary and second level oil return capillary are communicated with total oil return capillary by the interflow threeway of oil return capillary.
The present invention is owing to adopt the structure that is serially connected with second level oil eliminator on the pipeline between first order oil eliminator and the cross valve, the oil gas mixture that compressor is discharged can better separate through the two-stage oil eliminator, simultaneously be unlikely to again to cause the pressure loss excessive, can guarantee that also compressor lubrication is good when using the overlength pipe arrangement, improve product reliability, enlarged range of application.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples the specific embodiment of the present invention is described further.
As shown in Figure 1, two-stage oil return type air conditioning heat pump system of the present invention, comprise compressor 1, first order oil eliminator 2, cross valve 8, condenser 9, off-premises station electronics expansion valve 10, high pressure fluid reservoir 11, high-pressure stop valve 12, an above indoor set shunting electronics expansion valve 13, above evaporimeter 14 and low-pressure liquid storing tank 15, the exhaust outlet of compressor 1 wherein, first order oil eliminator 2, cross valve 8, condenser 9, off-premises station electronics expansion valve 10, high pressure fluid reservoir 11, high-pressure stop valve 12, indoor set shunting electronics expansion valve 13 and evaporimeter 14 are communicated with successively, the other end of evaporimeter 14 is communicated with the 3rd interface of cross valve 8, the 4th interface of cross valve 8 is communicated with the return-air mouth of compressor 1 by low-pressure liquid storing tank 15, be serially connected with second level oil eliminator 4 on the pipeline between described first order oil eliminator 2 and the cross valve 8, first order oil eliminator 2 and second level oil eliminator 4 are communicated with total oil return capillary 7 by first order oil return capillary 3 and second level oil return capillary 5 respectively, and total oil return capillary 7 is communicated with the return-air mouth of compressor 1.
In the present embodiment, above-mentioned first order oil return capillary 3 and second level oil return capillary 5 are communicated with total oil return capillary 7 by the interflow threeway 6 of oil return capillary.
Operation principle of the present invention is as follows: by the high temperature and high pressure gas of compressor output, by first order oil eliminator, allow the part mist of oil that carries in the exhaust separate, the overheated gaseous coolant that has a small amount of mist of oil after the separation enters second level oil eliminator again, separate once more, the oil mass that is comprised in the refrigerant after separating by twice oil has like this been reduced to lower state, flow back under the effect of draught head at compressor simultaneously, oil in the oil content is got back on the compressor return air pipe through the oil return capillary, finishes the circulation of the oil circuit between compressor and oil content; Refrigerant circulation aspect, the cold media gas that is come out by the secondary oil eliminator enters cross valve, the inlet chamber external condenser carries out heat exchange again, condensed gas-liquid two-phase refrigerant enters pressure pan after via the throttling of outer organic electronic expansion valve, too much refrigerant liquid refrigerants is stored in the pressure pan, carry out evaporation and heat-exchange with the electronics expansion valve to indoor evaporator (outdoor condenser) through interior machine shunting afterwards, overheated gas after the evaporation (or gas-liquid two-phase) is through behind the low-pressure liquid storing tank, guarantee that superheat state gas gets back to compressor, so circulation.
The oil gas mixture that compressor is discharged can better separate through the two-stage oil eliminator, is unlikely to again to cause the pressure loss excessive simultaneously, is guaranteeing can to adopt longer pipe arrangement under the good situation of compressor lubrication.
Claims (2)
1. two-stage oil return type air conditioning heat pump system, comprise compressor (1), first order oil eliminator (2), cross valve (8), condenser (9), off-premises station electronics expansion valve (10), high pressure fluid reservoir (11), high-pressure stop valve (12), an above indoor set shunting electronics expansion valve (13), an above evaporimeter (14) and low-pressure liquid storing tank (15), the exhaust outlet of compressor (1) wherein, first order oil eliminator (2), cross valve (8), condenser (9), off-premises station electronics expansion valve (10), high pressure fluid reservoir (11), high-pressure stop valve (12), indoor set shunting electronics expansion valve (13) and evaporimeter (14) are communicated with successively, the other end of evaporimeter (14) is communicated with the 3rd interface of cross valve (8), the 4th interface of cross valve (8) is communicated with the return-air mouth of compressor (1) by low-pressure liquid storing tank (15), it is characterized in that being serially connected with second level oil eliminator (4) on the pipeline between described first order oil eliminator (2) and the cross valve (8), first order oil eliminator (2) and second level oil eliminator (4) are communicated with total oil return capillary (7) by first order oil return capillary (3) and second level oil return capillary (5) respectively, and total oil return capillary (7) is communicated with the return-air mouth of compressor (1).
2. two-stage oil return type air conditioning heat pump system according to claim 1 is characterized in that above-mentioned first order oil return capillary (3) and second level oil return capillary (5) are communicated with total oil return capillary (7) by oil return capillary interflow threeway (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010199165 CN101865570A (en) | 2010-06-04 | 2010-06-04 | Two-stage oil return type air conditioning heat pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010199165 CN101865570A (en) | 2010-06-04 | 2010-06-04 | Two-stage oil return type air conditioning heat pump system |
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| Publication Number | Publication Date |
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| CN101865570A true CN101865570A (en) | 2010-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201010199165 Pending CN101865570A (en) | 2010-06-04 | 2010-06-04 | Two-stage oil return type air conditioning heat pump system |
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| CN (1) | CN101865570A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202814A (en) * | 2015-08-31 | 2015-12-30 | 宁波奥克斯电气有限公司 | Control method for preventing oil throwing during starting of multi-connected air conditioning unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2742351Y (en) * | 2004-10-27 | 2005-11-23 | 深圳市元征科技股份有限公司 | Cold medium recovery and refilling device |
| CN101270945A (en) * | 2008-05-13 | 2008-09-24 | 上海环球制冷设备有限公司 | Embedded oil separating condenser device and use method |
| CN201293492Y (en) * | 2008-10-11 | 2009-08-19 | 广东美的电器股份有限公司 | Air conditioner with plurality of indoor units |
| CN101520376A (en) * | 2009-03-12 | 2009-09-02 | 上海交通大学 | Testing device for detecting and controlling lubricating oil circulation rate of refrigerating system |
-
2010
- 2010-06-04 CN CN 201010199165 patent/CN101865570A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2742351Y (en) * | 2004-10-27 | 2005-11-23 | 深圳市元征科技股份有限公司 | Cold medium recovery and refilling device |
| CN101270945A (en) * | 2008-05-13 | 2008-09-24 | 上海环球制冷设备有限公司 | Embedded oil separating condenser device and use method |
| CN201293492Y (en) * | 2008-10-11 | 2009-08-19 | 广东美的电器股份有限公司 | Air conditioner with plurality of indoor units |
| CN101520376A (en) * | 2009-03-12 | 2009-09-02 | 上海交通大学 | Testing device for detecting and controlling lubricating oil circulation rate of refrigerating system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202814A (en) * | 2015-08-31 | 2015-12-30 | 宁波奥克斯电气有限公司 | Control method for preventing oil throwing during starting of multi-connected air conditioning unit |
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Open date: 20101020 |