CN204214165U - A kind of low temperature environment air conditioner cold and hot water unit - Google Patents
A kind of low temperature environment air conditioner cold and hot water unit Download PDFInfo
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- CN204214165U CN204214165U CN201420618223.XU CN201420618223U CN204214165U CN 204214165 U CN204214165 U CN 204214165U CN 201420618223 U CN201420618223 U CN 201420618223U CN 204214165 U CN204214165 U CN 204214165U
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Abstract
The utility model relates to a kind of low temperature environment air conditioner cold and hot water unit, comprise Two-stage Compression screw compressor, oil eliminator, cross valve, air side heat exchanger, reservoir, refrigerant-air-conditioning water side heat exchanger, gas-liquid separator, economizer, first throttle device and system pipeline accessory, and by described Two-stage Compression screw compressor, oil eliminator, cross valve, air side heat exchanger, reservoir, refrigerant-air-conditioning water side heat exchanger, gas-liquid separator, economizer, first throttle device and system pipeline fitment combination become to produce separately the refrigerant circulation circuit of air conditioner cold water, produce separately the refrigerant circulation circuit of air conditioning hot.The utility model advantage is under the severe cold environment being not less than-25 DEG C, to produce the heating hot water of 60 DEG C, be aided with economizer accessory system simultaneously and improve heating effect, be aided with water-cooled oil cooling system and carry out heat recovery, guarantee the heating capacity of air conditioner cold and hot water unit in severe cold winter.
Description
Technical field
The utility model relates to a kind of low temperature environment air conditioner cold and hot water unit, particularly relates to a kind of motor and drives, adopt the water chiller-heater unit of vapor-compression refrigerant cycle.
Background technology
At present in North China, northeast, the summer hot cold area such as northwest, its air conditioning mode is generally adopt air conditioner cold water unit summer, adopts winter boiler to warm oneself.Because in above area, winter temperature is generally lower than-10 DEG C, and region temperature is minimum northeastward can to-20 DEG C ~-30 DEG C, normal air source source pump reduces along with temperature, work under bad environment, machine technology restriction by compression, its minimum evaporating temperature of general single stage compress is at-20 DEG C ~-25 DEG C, and the minimum operating ambient temperature of unit is generally at about-10 DEG C; And the restriction of machine compression ratio by compression, now hot water effluent's temperature only can maintain about 40 DEG C.Therefore the defect of normal air source source pump in Compressor Technology, had both limited the region range of application of net for air-source heat pump units, also have impact on the result of use of user.In addition, northern area generally adopts summer air-conditioning cooling+winter boiler heating combine regulation mode, both adds investment cost, and causes the air pollution that boiler fired coal brings simultaneously, the frequent generation of north of china in winter haze weather in recent years, boiler fired coal is one of major reason.
Utility model content
The technical problems to be solved in the utility model there is provided can provide cold water a kind of summer, provides the low temperature environment air conditioner cold and hot water unit of 60 DEG C of hot water winter under the low temperature environment being low to moderate-25 DEG C.
The utility model provides a kind of low temperature environment air conditioner cold and hot water unit, comprise Two-stage Compression screw compressor, oil eliminator, cross valve, air side heat exchanger, reservoir, refrigerant-air-conditioning water side heat exchanger, gas-liquid separator, economizer, first throttle device and system pipeline accessory, and by described Two-stage Compression screw compressor, oil eliminator, cross valve, air side heat exchanger, reservoir, refrigerant-air-conditioning water side heat exchanger, gas-liquid separator, economizer, first throttle device and system pipeline fitment combination become to produce separately the refrigerant circulation circuit of air conditioner cold water, produce separately the refrigerant circulation circuit of air conditioning hot, described low temperature environment air conditioner cold and hot water unit is switchably in refrigerant circulation circuit described in one of them, wherein, produce separately refrigerant flow direction in the refrigerant circulation circuit of air conditioner cold water and be followed successively by Two-stage Compression screw compressor, oil eliminator, a path of cross valve, air side heat exchanger, reservoir, economizer, first throttle device, refrigerant-domestic hot-water side heat exchanger, another path of cross valve, gas-liquid separator, Two-stage Compression screw compressor, produce separately refrigerant flow direction in the refrigerant circulation circuit of air conditioning hot and be followed successively by Two-stage Compression screw compressor, oil eliminator, a path of cross valve, refrigerant-domestic hot-water side heat exchanger, reservoir, economizer, first throttle device, air side heat exchanger, another path of cross valve, gas-liquid separator, Two-stage Compression screw compressor.
According to an embodiment of the present utility model, low temperature environment air conditioner cold and hot water unit also comprises oil cooler, oil strainer and oily flow switch and oil circuit form, and becomes refrigeration oil closed circuit by described Two-stage Compression screw compressor, oil cooler, oil strainer, oily flow switch and oil circuit form and system pipeline fitment combination.Wherein, in refrigeration oil closed circuit, refrigeration oil flow direction is followed successively by Two-stage Compression screw compressor, oil cooler, oil strainer, oily flow switch, oil circuit form, Two-stage Compression screw compressor.
According to an embodiment of the present utility model, Two-stage Compression screw compressor is the compression screw rod configuring two cover series connection in a compressor, by the driven by motor two casing pressure compression screw arbor work be arranged in the middle of two casing pressure compression screw arbors.Under usual manner, refrigerant enters the second cover screw rod recompression after first set screw compression, improves compression ratio.
According to an embodiment of the present utility model, first throttle device is any one of electronic expansion valve, thermal type expansion valve and orifice plate.
According to an embodiment of the present utility model, oil cooler adopts water cooling mode, and oil cooler can be any one in shell-tube type, board-like and bushing type.
According to an embodiment of the present utility model, the check valve of an oil pump parallel connection is set between oil strainer and oily flow switch.
According to an embodiment of the present utility model, oil cooler Inlet and outlet water is connected to the Inlet and outlet water side of refrigerant-air-conditioning water side heat exchanger respectively, form a chilled(cooling) water return (CWR), the chilled(cooling) water return (CWR) of oil cooler water inlet side arranges an inlet pipeline motor-driven valve, and a temperature controlled water valve of connecting.
According to an embodiment of the present utility model, also comprise the second throttling arrangement, by the second throttling arrangement, economizer, Two-stage Compression screw compressor, and system pipeline fitment combination becomes refrigerant auxiliary piping, when producing separately air conditioning hot, refrigerant fills into Two-stage Compression screw compressor via refrigerant auxiliary piping.
According to an embodiment of the present utility model, also comprise a liquid spray expansion valve and liquid spray magnetic valve, in the refrigerant circulation circuit of getting after liquid point is arranged on economizer of liquid spray expansion valve and liquid spray magnetic valve.
The utility model adopts Two-stage Compression screw compressor, and is equipped with necessary economizer cycle, improves the heating effect of air-conditioner set at low temperature environment temperature.
Accompanying drawing explanation
Fig. 1 is the block diagram of a kind of air-conditioning water chiller of the utility model.
Detailed description of the invention
In order to understand the utility model further, below in conjunction with accompanying drawing, detailed description of the invention is described in detail.
As shown in Figure 1, a kind of low temperature environment air conditioner cold and hot water unit comprises Two-stage Compression screw compressor 1, non-return valve 2, oil eliminator 3, cross valve 4, air side heat exchanger 5, reservoir 6, first throttle device 7, refrigerant-air-conditioning water side heat exchanger 8, gas-liquid separator 9, oil cooler 10, oil pump 11, oil flow switch 12, oil strainer 13, ball valve 14, liquid spray expansion valve 15, liquid spray magnetic valve 16, economizer 17, second throttling arrangement 18, device for drying and filtering 19, liquid-sighting glass 20, angle valve 21, inlet pipeline motor-driven valve 22, temperature controlled water valve 23 and axial flow blower 24.These parts can form different closed circuits according to different operating modes.
Below each operating mode of air conditioner cold water unit is described, with reference to figure 1.
1. produce separately air conditioner cold water operating mode
Produce separately refrigerant flow direction in air conditioner cold water closed circuit and be followed successively by Two-stage Compression screw compressor 1, oil eliminator 3, the D path of cross valve 4, air side heat exchanger 5, reservoir 6, economizer 17, first throttle device 7, refrigerant-domestic hot-water side heat exchanger 8, the E path of cross valve 4, gas-liquid separator 9, Two-stage Compression screw compressor 1.
After unit opens air conditioner cold water pattern, under cold water pattern, cross valve 4 is in off-position, and cross valve D mouth is communicated with C mouth, and S mouth is communicated with E mouth.
After the cold media gas of the high pressure-temperature of oil-containing is discharged from Two-stage Compression screw compressor 1, edge
arrow is through non-return valve 2, arrive oil eliminator 3, in oil eliminator 3, gaseous coolant is separated with refrigeration oil, gaseous coolant exports the D mouth arriving cross valve 4 through non-return valve from oil eliminator 3, due to the guide effect of cross valve 4, enter air side heat exchanger 5 by the cold media gas of the C mouth of cross valve 4, now air side axial flow blower 24 is by the axial flow blower 24 of microcomputer controller according to gaseous coolant opened by pressure some.Owing to forcing air flowing, the refrigerant of HTHP to be left heat by air side heat exchanger 5, is condensed into the liquid of certain degree of supercooling, excessively cold refrigerant liquid through the one-way conduction of non-return valve, edge
arrow enters reservoir 6, then after drying filter 19, economizer 17, the gas-liquid mixture of low-temp low-pressure is become through electric expansion valve 7 reducing pressure by regulating flow, again by the one-way conduction of non-return valve, enter refrigerant-air-conditioning water side heat exchanger 8 and produce idle call cold water, low-temp low-pressure refrigerant absorbs water side heat and converts low area overheat gas to, more successively by the S mouth of cross valve 4, E mouth, gas-liquid separator 9 enter Two-stage Compression screw compressor 1 and complete a refrigerant circulation process.Refrigerant along
the path iterative cycles of setting, makes unit produce air conditioner cold water sustainedly and stably.
2. produce separately air conditioning hot operating mode
After unit opens air conditioning hot pattern, four-way change-over valve 4 is in obtain electricity condition, and four-way change-over valve D mouth is communicated with E mouth, and S mouth is communicated with C mouth.
The low-pressure side that air side heat exchanger 5 is positioned at Two-stage Compression screw compressor 1 plays evaporimeter effect, and all axial flow blowers 24 open running.Because ambient temperature is very low, the refrigerant evaporation pressure of air side heat exchanger 5 is very low, what enter Two-stage Compression screw compressor 1 has the gaseous coolant of certain degree of superheat for low-temp low-pressure, after the first order screw compression of Two-stage Compression screw compressor 1, cold media gas warm in pressure in discharge, after entering the 2nd grade of screw compression, pressure and temperature is able to further lifting.After the cold media gas of high pressure-temperature is discharged from Two-stage Compression screw compressor 1, edge
arrow enters oil eliminator 3, gaseous coolant is separated with refrigeration oil, gaseous coolant exports the D mouth arriving four-way change-over valve 4 through non-return valve from oil eliminator 3, due to the guide effect of cross valve 4, cold media gas imports refrigerant-air-conditioning water side heat exchanger 8, refrigerant condensation heat release makes water temperature rise and produces air conditioning hot, and refrigerant is condensed into high-pressure sub-cooled liquid.Cross the one-way conduction through non-return valve after cold refrigerant liquid, edge
arrow enters reservoir 6.Because during winter heating, circulating refrigerant amount is less, unnecessary refrigerant enters reservoir 6 and stores, other liquid refrigerants are after device for drying and filtering 19, economizer 17, the gas-liquid mixture of low-temp low-pressure is become through electric expansion valve 7 reducing pressure by regulating flow, again by the one-way conduction of non-return valve, enter air side heat exchanger 5, more successively by the C mouth of cross valve 4, E mouth, gas-liquid separator 9 enter Two-stage Compression screw compressor 1 and complete a refrigerant circulation process.Refrigerant along
the path iterative cycles of setting, makes unit produce air conditioning hot sustainedly and stably.
Preferred as of the utility model embodiment, low temperature environment air conditioner cold and hot water unit also comprises by Two-stage Compression screw compressor 1, oil cooler 10, oil strainer 13, oily flow switch 12 and oil circuit form 26, and the refrigeration oil closed circuit that system pipeline fitment combination becomes.In refrigeration oil closed circuit, refrigeration oil flow direction is followed successively by Two-stage Compression screw compressor 1, oil cooler 10, oil strainer 13, oily flow switch 12, oil circuit form 26, Two-stage Compression screw compressor 1.The waste heat of oil cooler is reclaimed.
The refrigeration oil that oil eliminator 3 is separated and stores, and the refrigeration oil stored in oil cooler 10, by the effect of the pressure differential between Two-stage Compression screw compressor 1 high pressure and low pressure, after filter 13, non-return valve, oily flow switch 12, oil circuit form 26, enter oil groove bottom Two-stage Compression screw compressor 1, ensure the refrigeration oil demand of Two-stage Compression screw compressor 1.When producing separately air conditioner cold water summer, Two-stage Compression screw compressor 1 high pressure is higher, can guarantee that pressure reduction is to meet Two-stage Compression screw compressor 1 for oil require.
Preferred as of the utility model embodiment, Two-stage Compression screw compressor 1, be at the built-in two casing pressure compression screw arbors of a compressor, by the driven by motor two casing pressure compression screw arbor work be arranged in the middle of two casing pressure compression screw arbors, two casing pressure compression screw arbors are in series relationship.Under normal working practices, refrigerant enters the second cover screw rod recompression after first set screw compression, thus improves compression ratio.This kind of vibrational power flow is simple, and workpiece is few, easy for installation.
As one of the utility model embodiment preferably, first throttle device 7 is any one of electronic expansion valve, thermal type expansion valve and orifice plate.
As one of the utility model embodiment, preferably oil cooler 10 adopts water cooling mode, and oil cooler 10 can be any one in shell-tube type, board-like and bushing type.
Preferred as of the utility model embodiment, a check valve in parallel with oil pump 11 is set between oil strainer 13 and oily flow switch 12.Two-stage Compression screw compressor 1 pressure at expulsion is relevant to water temperature, and when water temperature is lower, pressure at expulsion is lower.Producing under air conditioning hot operating mode, when Two-stage Compression screw compressor 1 height pressure reduction can not meet fuel feeding, opening oil pump 11, to refrigeration oil pressurization, ensure Two-stage Compression screw compressor 1 fuel feeding.
Preferred as of the utility model embodiment, oil cooler 10 Inlet and outlet water is connected to refrigerant-air-conditioning water side heat exchanger 8 Inlet and outlet water side respectively, form a chilled(cooling) water return (CWR), oil cooler 10 intake side chilled(cooling) water return (CWR) on an inlet pipeline motor-driven valve 22 is set, an and temperature controlled water valve 23 of connecting.Inlet pipeline motor-driven valve 22 cuts out producing under cold water operating mode, opens under producing air conditioning hot operating mode.Under hot water preparing operating mode, when oil temperature is elevated to setting value, open inlet pipeline motor-driven valve 22, opening temp. control formula water regulating valve 23, air conditioning hot enters the waste heat that oil cooler 10 reclaims high temperature refrigeration oil.
Preferred as of the utility model embodiment, low temperature environment air conditioner cold and hot water unit also comprises the second throttling arrangement 18, by the second throttling arrangement 18, economizer 17, Two-stage Compression screw compressor 1, and system pipeline fitment combination becomes refrigerant auxiliary piping.At low ambient temperatures, when producing separately air conditioning hot operating mode, adopt the economizer cycle system be made up of economizer 17 and the second throttling arrangement 18, fill into gaseous coolant to Two-stage Compression screw compressor 1, the heating capacity of whole unit can be increased substantially.And temperature is lower, Suck and exhaust pressure is than larger, and fill into gaseous coolant more, heat lift effect is more obvious.Meanwhile, by the gaseous coolant filled into, effectively can reduce the delivery temperature of one-level screw compression, make secondary screw compression be in better running status.
As one of the utility model embodiment preferably, low temperature environment air conditioner cold and hot water unit also comprises a liquid spray expansion valve 15 and liquid spray magnetic valve 16, in their refrigerant circulation circuit of getting after liquid point is arranged on economizer.The motor of Two-stage Compression screw compressor 1 is arranged in the middle of two sections of screw rods, the mode that common screw compressor air suction can not be adopted to cool is to reduce motor temperature, therefore independent liquid jet pipe road is adopted, liquid refrigerants amount is controlled, the motor of liquid spray cooling Two-stage Compression screw compressor 1 by liquid spray expansion valve 15.When Two-stage Compression screw compressor 1 delivery temperature is very high; when exceeding control program setting protection value; open liquid spray magnetic valve 16; liquid refrigerants is vaporized after entering Two-stage Compression screw compressor 1 by auxiliary piping; absorb gaseous state heat in Two-stage Compression screw compressor 1; reduce delivery temperature, unit stability and safety is run.
Feature of the present utility model is, adopts Two-stage Compression screw compressor, and is equipped with necessary economizer cycle, improves the heating effect of air-conditioner set at low temperature environment temperature.Summer can provide air conditioner cold water, and winter can provide high-quality hot water, and the air conditioning mode of alternative air conditioner refrigerating unit+boiler heating, namely may be used for the air conditioning of northern new building, reduces the investment cost of boiler plant; Also may be used for old building remodeling project, substitute coal-burning boiler, reduce CO2 emission, effectively promote air quality.
Although the utility model with preferred embodiment openly as above, it is not for limiting the utility model.Any those skilled in the art, not departing from spirit and scope of the present utility model, can make possible variation and amendment.Therefore, every content not departing from technical solutions of the utility model, any amendment done above embodiment according to technical spirit of the present utility model, equivalent variations and modification, all fall within protection domain that the utility model claim defines.
Claims (9)
1. a low temperature environment air conditioner cold and hot water unit, it is characterized in that, comprise Two-stage Compression screw compressor, oil eliminator, cross valve, air side heat exchanger, reservoir, refrigerant-air-conditioning water side heat exchanger, gas-liquid separator, economizer, first throttle device and system pipeline accessory, and by described Two-stage Compression screw compressor, oil eliminator, cross valve, air side heat exchanger, reservoir, refrigerant-air-conditioning water side heat exchanger, gas-liquid separator, economizer, first throttle device and system pipeline fitment combination become produce separately the refrigerant circulation circuit of air conditioner cold water and produce separately the refrigerant circulation circuit of air conditioning hot, described low temperature environment air conditioner cold and hot water unit is switchably in one of them refrigerant circulation circuit, wherein:
Produce separately refrigerant flow direction in the refrigerant circulation circuit of air conditioner cold water and be followed successively by Two-stage Compression screw compressor, oil eliminator, a path of cross valve, air side heat exchanger, reservoir, economizer, first throttle device, refrigerant-domestic hot-water side heat exchanger, another path of cross valve, gas-liquid separator, Two-stage Compression screw compressor;
Produce separately refrigerant flow direction in the refrigerant circulation circuit of air conditioning hot and be followed successively by Two-stage Compression screw compressor, oil eliminator, a path of cross valve, refrigerant-domestic hot-water side heat exchanger, reservoir, economizer, first throttle device, air side heat exchanger, another path of cross valve, gas-liquid separator, Two-stage Compression screw compressor.
2. a kind of low temperature environment air conditioner cold and hot water unit as claimed in claim 1, it is characterized in that: described low temperature environment air conditioner cold and hot water unit also comprises oil cooler, oil strainer, oily flow switch and oil circuit form, and becomes refrigeration oil closed circuit by described Two-stage Compression screw compressor, oil cooler, oil strainer, oily flow switch, oil circuit form and system pipeline fitment combination; Wherein,
In refrigeration oil closed circuit, refrigeration oil flow direction is followed successively by Two-stage Compression screw compressor, oil cooler, oil strainer, oily flow switch, oil circuit form, Two-stage Compression screw compressor.
3. a kind of low temperature environment air conditioner cold and hot water unit as claimed in claim 1 or 2, it is characterized in that, described Two-stage Compression screw compressor is the compression screw rod configuring two cover series connection in a compressor, by the driven by motor two casing pressure compression screw arbor work be arranged in the middle of two casing pressure compression screw arbors.
4. a kind of low temperature environment air conditioner cold and hot water unit as claimed in claim 1, is characterized in that, described first throttle device is any one of electronic expansion valve, thermal type expansion valve and orifice plate.
5. a kind of low temperature environment air conditioner cold and hot water unit as claimed in claim 2, is characterized in that: described oil cooler is water cooling mode, and described oil cooler be shell-tube type, board-like and telescopic any one.
6. a kind of low temperature environment air conditioner cold and hot water unit as claimed in claim 2, is characterized in that: also comprise and be arranged on check valve between described oil strainer and described oily flow switch and in parallel with oil pump.
7. a kind of low temperature environment air conditioner cold and hot water unit as claimed in claim 5, it is characterized in that: described oil cooler Inlet and outlet water is connected to the Inlet and outlet water side of refrigerant-air-conditioning water side heat exchanger respectively, form a chilled(cooling) water return (CWR), the chilled(cooling) water return (CWR) of oil cooler water inlet side arranges an inlet pipeline motor-driven valve, and a temperature controlled water valve of connecting.
8. a kind of low temperature environment air conditioner cold and hot water unit as claimed in claim 1, it is characterized in that, also comprise the second throttling arrangement, by described second throttling arrangement, economizer, Two-stage Compression screw compressor, and system pipeline fitment combination becomes refrigerant auxiliary piping, when producing separately air conditioning hot, refrigerant fills into Two-stage Compression screw compressor via described refrigerant auxiliary piping.
9. a kind of low temperature environment air conditioner cold and hot water unit as claimed in claim 8, it is characterized in that, also comprise a liquid spray expansion valve and liquid spray magnetic valve, the liquid point of getting of described liquid spray expansion valve and described liquid spray magnetic valve is arranged in the refrigerant circulation circuit after described economizer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420618223.XU CN204214165U (en) | 2014-10-23 | 2014-10-23 | A kind of low temperature environment air conditioner cold and hot water unit |
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| CN201420618223.XU CN204214165U (en) | 2014-10-23 | 2014-10-23 | A kind of low temperature environment air conditioner cold and hot water unit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196382A (en) * | 2016-08-31 | 2016-12-07 | 南京五洲制冷集团有限公司 | Ultralow ambient temperature air source source pump |
| CN107101408A (en) * | 2017-06-15 | 2017-08-29 | 周登荣 | It is a kind of to be used for the thermoregulating system that carbon dioxide is medium |
| CN108120039A (en) * | 2016-11-27 | 2018-06-05 | 侴乔力 | The heat pump cycle of compressor Suck and exhaust pressure Fast-Balance after shutdown |
| CN109210822A (en) * | 2018-10-25 | 2019-01-15 | 重庆重通智远空调设备有限公司 | A kind of compound energy heat pump unit and system |
| CN114450543A (en) * | 2019-09-30 | 2022-05-06 | 大金工业株式会社 | Air conditioner |
-
2014
- 2014-10-23 CN CN201420618223.XU patent/CN204214165U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196382A (en) * | 2016-08-31 | 2016-12-07 | 南京五洲制冷集团有限公司 | Ultralow ambient temperature air source source pump |
| CN108120039A (en) * | 2016-11-27 | 2018-06-05 | 侴乔力 | The heat pump cycle of compressor Suck and exhaust pressure Fast-Balance after shutdown |
| CN107101408A (en) * | 2017-06-15 | 2017-08-29 | 周登荣 | It is a kind of to be used for the thermoregulating system that carbon dioxide is medium |
| CN109210822A (en) * | 2018-10-25 | 2019-01-15 | 重庆重通智远空调设备有限公司 | A kind of compound energy heat pump unit and system |
| CN114450543A (en) * | 2019-09-30 | 2022-05-06 | 大金工业株式会社 | Air conditioner |
| CN114450543B (en) * | 2019-09-30 | 2023-11-17 | 大金工业株式会社 | air conditioner |
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