CN105823142A - Outdoor unit set of air conditioning variable refrigerant volume system and pressure detection method - Google Patents
Outdoor unit set of air conditioning variable refrigerant volume system and pressure detection method Download PDFInfo
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- CN105823142A CN105823142A CN201610281823.5A CN201610281823A CN105823142A CN 105823142 A CN105823142 A CN 105823142A CN 201610281823 A CN201610281823 A CN 201610281823A CN 105823142 A CN105823142 A CN 105823142A
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- Prior art keywords
- compressor
- indoor set
- air conditioning
- outer machine
- induction apparatus
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
-
- 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
- F25B2500/05—Cost reduction
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an outdoor unit set of an air conditioning variable refrigerant volume system. The outdoor unit set comprises outdoor units, and each outdoor unit comprises a compressor, an outdoor unit heat exchanger, an electronic expansion valve, a refrigeration one-way valve and a four-way valve; two ends of the refrigeration one-way valve are communicated with two ends of the electronic expansion valve respectively; the other end of the outdoor unit heat exchanger is communicated with the other end of an indoor unit via the electronic expansion valve; the outdoor unit set of the air conditioning variable refrigerant volume system is characterized in that a high pressure sensor is arranged on a connection pipeline between the output end of the compressor and the four-way valve in any one outdoor unit; a low pressure sensor is arranged on a connection pipeline between the input end of the compressor and the four-way valve; and a secondary pressure sensor is arranged on a connection pipeline between the four-way valve and the outdoor unit heat exchanger of each of the rest of the outdoor units. According to the outdoor unit set of the air conditioning variable refrigerant volume system, the number of the pressure sensors is reduced, so that the cost is reduced.
Description
Technical field
The present invention relates to the technical field of air-conditioning, the outer machine unit of a kind of air conditioning multi-couple machine and pressure detection method.
Background technology
Air conditioning multi-couple machine is also known as multi-connected air conditioning system (being called for short VRV), owing to its outstanding part throttle characteristics and significant use energy-saving effect are widely used the occasions such as office, workshop.
For multi-connected machine, the comfortableness of Consumer's Experience is met in order to be accurately controlled the temperature of indoor, its control needing air conditioning system carries out high pressure and low pressure, that is low voltage control is carried out when refrigeration, high voltage control is carried out when heating, the each outer machine of existing multi-connected machine is all each with a high-pressure pressure sensor and a low-pressure sensor, high-pressure pressure sensor is arranged on the output pipe between the outfan of compressor and cross valve, for detecting the high-voltage value under heating mode, low-pressure sensor is arranged on the reflux pipe between cross valve and the input of compressor, for detecting the low voltage value under refrigeration mode.But owing to the outer machine unit of multi-connected machine is become by multiple outer mechanisms, and whole multiple on-line system has only to read the detected value of the high-pressure pressure sensor of an outer machine in a heating mode, therefore the idle waste of high-pressure pressure sensor of its besides machine, in like manner, under carrying out refrigeration mode, have only to read the detected value of the low-pressure sensor of an outer machine, the idle waste of low-pressure sensor of its besides machine.
So, for multi-connected machine, the quantity (being defined as y) of its pressure transducer is 2 times of outer machine number (being defined as n), i.e. y=2n (n >=2, n ∈ Z), and in actual application, the pressure transducer y=n+1 (n >=2, n ∈ Z) effectively used.As a example by the multi-connected machine of 4 outer machines, the pressure transducer of its design is 2*4=8, wherein four high-pressure pressure sensor, four low-pressure sensors, and when it is actually used, only uses 5 sensors, 3 extra idle wastes of pressure transducer.
Although the several pressure transducers of many installations concern less for cost on single multi-connected machine, but either house, office building, constant temperature workshop, market and research institutions, it all be unable to do without the use of air conditioning system, the most how to solve partial pressure sensor in multi-connected machine leave unused waste problem, actually response national energy-saving reduce discharging, reduce cost technical problem important to be solved.
Summary of the invention
The technical problem to be solved is: provide the outer machine unit of a kind of air conditioning multi-couple machine, and the quantity of its pressure transducer reduces, thus cost-effective.
The technical solution used in the present invention is: providing the outer machine unit of a kind of air conditioning multi-couple machine, the off-premises station that it connects after including at least two parallel connection with indoor set, each off-premises station the most each includes: a compressor；One outer machine heat exchanger；One electric expansion valve；One refrigeration check valve, the two ends of refrigeration check valve connect with the two ends of electric expansion valve respectively, pass through for the coolant being intended for when indoor set is in refrigeration mode；One cross valve, when indoor set is in refrigeration mode for connecting outfan and one end of outer machine heat exchanger of compressor, and one end of indoor set and the input of compressor, the one end for the outfan and indoor set connecting compressor is switched to when indoor set is in heating mode, and one end of outer machine heat exchanger and the input of compressor；The other end of described outer machine heat exchanger connects with the other end of indoor set through electric expansion valve；Connecting line between outfan and the cross valve of the compressor in any one off-premises station is provided with high-pressure induction apparatus, connecting line between input and the cross valve of compressor is provided with low pressure induction apparatus, and the cross valve of remaining off-premises station and the connecting line of outer machine heat exchanger are provided with second pressure sensor.
Being provided with oil eliminator between described compressor and cross valve, the input port of oil eliminator connects with the outfan of compressor, and the gas outlet of oil eliminator connects with cross valve, and the oil-out of oil eliminator connects with the input of compressor.
Being provided with gas-liquid separator between described compressor and cross valve, the input port of gas-liquid separator is connected with cross valve, and the delivery outlet of gas-liquid separator connects with the input port of compressor.
After using above structure, the outer machine unit of a kind of air conditioning multi-couple machine of the present invention compared with prior art has the advantage that the quantity greatly reducing pressure inductor, thus has saved the cost of air conditioning multi-couple machine.
The technical problem to be solved is: provide the pressure detection method of a kind of air conditioning multi-couple machine, and it reduces the quantity of pressure inductor on the basis of not affecting the pressure detecting of high pressure and low pressure.
The technical solution used in the present invention is: provide the pressure detection method of a kind of outer machine unit based on described air conditioning multi-couple machine, and it includes: 1), read high-pressure induction apparatus, low pressure induction apparatus and the detected value of second pressure sensor；2) when indoor set is in refrigeration mode using the detected value of low pressure induction apparatus as the low voltage value of system, using the detected value on high-pressure induction apparatus and each second pressure sensor as the high-voltage value of each self-corresponding off-premises station；When indoor set is in heating mode using the detected value of high-pressure induction apparatus as the high-voltage value of system, using the detected value on low pressure induction apparatus and each second pressure sensor as the low voltage value of each self-corresponding off-premises station.
After using above structure, the pressure detection method of a kind of air conditioning multi-couple machine of the present invention compared with prior art has the advantage that the quantity that can greatly reduce pressure transducer in the case of system detected value is constant.
Accompanying drawing explanation
Fig. 1 is the distribution schematic diagram of the outer machine unit of a kind of air conditioning multi-couple machine of the present invention.
Fig. 2 is the close-up schematic view in " A " region in Fig. 1.
Fig. 3 is the close-up schematic view in " B " region in Fig. 1.
Wherein, 1, indoor set, 2, compressor, 3, outer machine heat exchanger, 4, electric expansion valve, 5, refrigeration check valve, 6, cross valve, 7, high-pressure induction apparatus, 8, low pressure induction apparatus, 9, second pressure sensor, 10, oil eliminator, 11, gas-liquid separator, 12, liquid pipe stop valve, 13, trachea stop valve, 14, blower fan.
Detailed description of the invention
The invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings.
The present invention provides the outer machine unit of a kind of air conditioning multi-couple machine, the off-premises station that it connects after including at least two parallel connection with indoor set 1, and each off-premises station the most each includes: a compressor 2；One outer machine heat exchanger 3；One electric expansion valve 4；One refrigeration check valve 5, the two ends with electric expansion valve 4 respectively, two ends of refrigeration check valve 5 connects, are used for the coolant being intended for when indoor set 1 is in refrigeration mode and pass through；One cross valve 6, when indoor set 1 is in refrigeration mode for connecting outfan and one end of outer machine heat exchanger 3 of compressor 2, and one end of indoor set 1 and the input of compressor 2, the outfan for connecting compressor 2 and one end of indoor set 1 is switched to when indoor set 1 is in heating mode, and one end of outer machine heat exchanger 3 and the input of compressor 2；The other end of described outer machine heat exchanger 3 connects through the other end of electric expansion valve 4 with indoor set 1；Connecting line between outfan and the cross valve 6 of the compressor 2 in any one off-premises station is provided with high-pressure induction apparatus 7, connecting line between input and the cross valve 6 of compressor 2 is provided with low pressure induction apparatus 8, and the cross valve 6 of remaining off-premises station and the connecting line of outer machine heat exchanger 3 are provided with second pressure sensor 9.
Being provided with oil eliminator 10 between described compressor 2 and cross valve 6, the input port of oil eliminator 10 connects with the outfan of compressor 2, and the gas outlet of oil eliminator 10 connects with cross valve 6, and the oil-out of oil eliminator 10 connects with the input of compressor 2.
Being provided with gas-liquid separator 11 between described compressor 2 and cross valve 6, the input port of gas-liquid separator 11 is connected with cross valve 6, and the delivery outlet of gas-liquid separator 11 connects with the input port of compressor 2.
Connecting line between described electric expansion valve 4 and indoor set 1 is provided with liquid pipe stop valve 12, the connecting line of cross valve and indoor set is provided with trachea stop valve 13, and described liquid pipe stop valve 12 and trachea stop valve 13 are the open-close on-off when indoor set 1 and off-premises station carry out subpackage.
The most above-mentioned outer machine heat exchanger needs to set up blower fan 14 for improving heat transfer effect in carrying out heat transfer process.
Above-mentioned cross valve 6 includes first interface, the second interface, the 3rd interface and the 4th interface, 3rd interface and the 4th orifice when first interface in described cross valve 6 and the second orifice, or the second interface and the 4th interface when first interface and three orifice.The described first interface of cross valve 6 connects with the delivery outlet of compressor, one end that second interface deviates from electric expansion valve 4 with outer machine heat exchanger 3 connects, 3rd interface connects with the other end away from electric expansion valve 4 of indoor set 1, and the 4th interface connects with the input of compressor 2.
So, when indoor set 1 is under refrigeration mode, coolant is from the beginning of the input of compressor 2, sequentially through oil-liquid separator 10, the first interface of cross valve 6, the second interface of cross valve 6, outer machine heat exchanger 3, refrigeration check valve 5 (wherein small part is through electric expansion valve 4), indoor set 1, the 3rd interface of cross valve 6, the 4th interface of cross valve 6, gas-liquid separator 11, and finally it is back to compressor 2.
In like manner, when indoor set 1 is under heating mode, coolant is from the beginning of the input of compressor 2, sequentially through oil-liquid separator 10, the first interface of cross valve 6, the 3rd interface of cross valve 6, indoor set 1, electric expansion valve 4, outer machine heat exchanger 3, the second interface of cross valve, the 4th interface of cross valve, oil-liquid separator 10, and finally it is back to compressor 2.
Above-mentioned refrigeration check valve 5 is in parallel with electric expansion valve 4, the most as shown in the figure, coolant when indoor set 1 is under refrigeration mode from left to right through electric expansion valve 4 and refrigeration check valve 5, most coolant flows in indoor set 1 through refrigeration check valve 5, the coolant of fraction enters indoor set 1 through electric expansion valve 4, otherwise, coolant is turned left through electric expansion valve 4 when indoor set 1 is under heating mode from the right side, without circulating in refrigeration check valve 5.
A kind of pressure detection method of outer machine unit based on the air conditioning multi-couple machine described in claim 1, it includes:
1), high-pressure induction apparatus 7, low pressure induction apparatus 8 and the detected value of second pressure sensor 9 are read；
2), when indoor set 1 is in refrigeration mode using the detected value of low pressure induction apparatus 8 as the low voltage value of system, using the detected value on high-pressure induction apparatus 7 and each second pressure sensor 9 as the high-voltage value of each self-corresponding off-premises station；When indoor set 1 is in heating mode using the detected value of high-pressure induction apparatus 7 as the high-voltage value of system, using the detected value on low pressure induction apparatus 8 and each second pressure sensor 9 as the low voltage value of each self-corresponding off-premises station.
Certainly necessarily containing controller in indoor set 1, controller is controlled the keying of compressor 2, blower fan and electromagnetic valve by reading the detection signal of feedback on high-pressure induction apparatus 7, low pressure induction apparatus 8 and second pressure sensor 9.
Above preferred embodiment of the present invention is described, but is not to be construed as limitations on claims.The present invention is not only limited to above example, and its concrete structure allows to change, and all various changes made in the protection domain of demand for independence of the present invention are the most within the scope of the present invention.
Claims (4)
1. an outer machine unit for air conditioning multi-couple machine, the off-premises station that it connects with indoor set (1) after including at least two parallel connection, each off-premises station the most each includes:
One compressor (2)；
One outer machine heat exchanger (3)；
One electric expansion valve (4)；
One refrigeration check valve (5), two ends with electric expansion valve (4) respectively, the two ends of refrigeration check valve (5) connect, and are used for the coolant being intended for when indoor set (1) is in refrigeration mode and pass through；
One cross valve (6), when indoor set (1) is in refrigeration mode for connecting outfan and one end of outer machine heat exchanger (3) of compressor (2), and one end of indoor set (1) and the input of compressor (2), the outfan for connecting compressor (2) and one end of indoor set (1) is switched to when indoor set (1) is in heating mode, and one end of outer machine heat exchanger (3) and the input of compressor (2)；
The other end of described outer machine heat exchanger (3) connects through the other end of electric expansion valve (4) with indoor set (1)；
It is characterized in that:
Connecting line between outfan and the cross valve (6) of the compressor (2) in any one off-premises station is provided with high-pressure induction apparatus (7), connecting line between input and the cross valve (6) of compressor (2) is provided with low pressure induction apparatus (8), and the cross valve (6) of remaining off-premises station and the connecting line of outer machine heat exchanger (3) are provided with second pressure sensor (9).
The outer machine unit of a kind of air conditioning multi-couple machine the most according to claim 1, it is characterized in that: between described compressor (2) and cross valve (6), be provided with oil eliminator (10), the input port of oil eliminator (10) connects with the outfan of compressor (2), the gas outlet of oil eliminator (10) connects with cross valve (6), and the oil-out of oil eliminator (10) connects with the input of compressor (2).
The outer machine unit of a kind of air conditioning multi-couple machine the most according to claim 1, it is characterized in that: between described compressor (2) and cross valve (6), be provided with gas-liquid separator (11), the input port of gas-liquid separator (11) is connected with cross valve (6), and the delivery outlet of gas-liquid separator (11) connects with the input port of compressor (2).
4. a pressure detection method for outer machine unit based on the air conditioning multi-couple machine described in claim 1, it includes:
1), high-pressure induction apparatus (7), low pressure induction apparatus (8) and the detected value of second pressure sensor (9) are read；
2) when indoor set (1) is in refrigeration mode using the detected value of low pressure induction apparatus (8) as the low voltage value of system, using the detected value on high-pressure induction apparatus (7) and each second pressure sensor (9) as the high-voltage value of each self-corresponding off-premises station；
When indoor set (1) is in heating mode using the detected value of high-pressure induction apparatus (7) as the high-voltage value of system, using the detected value on low pressure induction apparatus (8) and each second pressure sensor (9) as the low voltage value of each self-corresponding off-premises station.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610281823.5A CN105823142B (en) | 2016-04-29 | 2016-04-29 | A kind of outer machine unit and pressure detection method of air conditioning multi-couple machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610281823.5A CN105823142B (en) | 2016-04-29 | 2016-04-29 | A kind of outer machine unit and pressure detection method of air conditioning multi-couple machine |
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| CN105823142A true CN105823142A (en) | 2016-08-03 |
| CN105823142B CN105823142B (en) | 2019-06-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112236626A (en) * | 2018-07-11 | 2021-01-15 | 大金工业株式会社 | Ventilation system |
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| CN1415914A (en) * | 2001-10-30 | 2003-05-07 | 海尔集团公司 | Multiple air-conditioners with variable energy driven by one set |
| CN101086370A (en) * | 2006-06-06 | 2007-12-12 | 乐金电子(天津)电器有限公司 | Air conditioner and control method thereof |
| CN102997368A (en) * | 2012-12-10 | 2013-03-27 | 宁波奥克斯电气有限公司 | Intelligent defrosting control method for parallel multiple on-line unit with multiple compressors |
| JP2013178058A (en) * | 2012-02-29 | 2013-09-09 | Hitachi Appliances Inc | Air conditioner |
| CN205536245U (en) * | 2016-04-29 | 2016-08-31 | 宁波奥克斯电气股份有限公司 | How inline outer unit of air conditioner |
-
2016
- 2016-04-29 CN CN201610281823.5A patent/CN105823142B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1415914A (en) * | 2001-10-30 | 2003-05-07 | 海尔集团公司 | Multiple air-conditioners with variable energy driven by one set |
| CN101086370A (en) * | 2006-06-06 | 2007-12-12 | 乐金电子(天津)电器有限公司 | Air conditioner and control method thereof |
| JP2013178058A (en) * | 2012-02-29 | 2013-09-09 | Hitachi Appliances Inc | Air conditioner |
| CN102997368A (en) * | 2012-12-10 | 2013-03-27 | 宁波奥克斯电气有限公司 | Intelligent defrosting control method for parallel multiple on-line unit with multiple compressors |
| CN205536245U (en) * | 2016-04-29 | 2016-08-31 | 宁波奥克斯电气股份有限公司 | How inline outer unit of air conditioner |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112236626A (en) * | 2018-07-11 | 2021-01-15 | 大金工业株式会社 | Ventilation system |
| US11268728B2 (en) | 2018-07-11 | 2022-03-08 | Daikin Industries, Ltd. | Ventilation system |
| US11703245B2 (en) | 2018-07-11 | 2023-07-18 | Daikin Industries, Ltd. | Ventilation system |
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| CN105823142B (en) | 2019-06-18 |
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