CN2926935Y - Low-temperature heat pump air conditioning system - Google Patents
Low-temperature heat pump air conditioning system Download PDFInfo
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- CN2926935Y CN2926935Y CN 200620060435 CN200620060435U CN2926935Y CN 2926935 Y CN2926935 Y CN 2926935Y CN 200620060435 CN200620060435 CN 200620060435 CN 200620060435 U CN200620060435 U CN 200620060435U CN 2926935 Y CN2926935 Y CN 2926935Y
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Abstract
The utility model relates to an air source heat pump air conditioner field especially relates to a possess the low temperature heat pump air conditioning system of good effect of heating under outdoor low temperature operating mode. The system comprises a liquid storage device, a compressor air supplementing system and other components, wherein an interface c of the liquid storage device is connected with an EVI unloading valve and then connected with a second air suction port of the compressor, and a digital unloading valve is connected between a first air suction port of the compressor and an air exhaust port of the compressor. When the outdoor environment temperature is lower than zero, the compressor air supplement system in the unit plays a role, the EVI unloading valve is opened to supplement saturated refrigerant gas with intermediate pressure to the compressor, double-stage compression is realized in the compressor, the heating capacity of the unit under the outdoor low-temperature working condition is improved, and when the unit is in partial load operation, the digital unloading valve is controlled to be opened and closed, so that the compressor does work discontinuously, the energy-saving purpose is achieved, and the same heating effect can be obtained.
Description
[technical field]
The utility model relates to the air source heat pump air-conditioner field, relates in particular to a kind of low temperature heat pump air conditioning system that has good heating effect under outdoor worst cold case.
[background technology]
At present, the normal air source heat pump air-conditioner unit of selling on the market, under the operating mode of outdoor low temperature, the heating capacity decay is very serious, even can't normally start operation, this unit can only use at transition season at the northern China cold district, can't satisfy basic heat demand in the winter of cold.The traditional central heating mode of northern China is based on coal-fired, combustion gas, and these heating systems all can't reach the requirement of social development at energy-saving and environmental protection, secure context.So need a kind of super low temperature heat pump air-conditioning unit that can under worst cold case, obtain good heating effect of exploitation, and guarantee that unit is when full load or operation at part load, all can obtain good heating effect, and unit is when operation at part load, the discontinuous acting of compressor reaches energy-conservation purpose.
[summary of the invention]
The purpose of this utility model is to provide a kind of low-temperature air conditioner heat pump system that can have good heating effect under outdoor low-temperature working situation, and when indoor set is not exclusively opened, during the indoor units sub-load, the discontinuous acting of compressor, reach energy-conservation purpose, and can obtain same heating effect.
For achieving the above object, the utility model adopts following technical scheme:
A kind of low temperature heat pump air conditioning system, comprise indoor unit, outdoor unit, described indoor unit comprises at least one indoor set, described indoor set comprises indoor set heat exchanger and indoor electric expansion valve, outdoor unit comprises the off-premises station heat exchanger, secondary cooling coil, gas-liquid separator, cross valve, first throttle device and compressor air compensating system, described first throttle device is composed in parallel by outdoor electric expansion valve and check valve, described compressor air compensating system comprises second throttling arrangement, compressor, reservoir, described second throttling arrangement is composed in parallel by EVI electric expansion valve and check valve, each assembly connects to form complete loops by copper pipe, the c interface of described reservoir has connected second air entry that is connected to compressor behind the EVI feather valve, is connected with digital feather valve between the exhaust outlet of first air entry of compressor and compressor.
Its second is characterised in that: the c interface of described connection reservoir and the copper pipe of EVI feather valve are drawn from the reservoir top.
Its 3rd is characterised in that: described compressor is jet digital scroll compressor.
The utility model provides a kind of low temperature heat pump air conditioning system of obtaining good heating effect under worst cold case, when outdoor temperature is lower than zero degree, the compressor air compensating system plays a role in the unit, the EVI feather valve is opened the saturated refrigerant gas that replenishes intermediate pressure to compressor, compress at the inner twin-stage of realizing of compressor, improve the heating capacity of unit under outdoor worst cold case, and when the unit operation at part load, by controlling the opening and closing of digital feather valve, make the discontinuous acting of compressor, reach energy-conservation purpose, and can obtain same heating effect.
[description of drawings]
Fig. 1 is the internal structure schematic diagram of the utility model low temperature heat pump air conditioning system;
Fig. 2 is that the utility model low temperature heat pump air conditioning system is opened at the EVI feather valve, the heating operation pressure-enthalpy chart when digital feather valve cuts out.
[specific embodiment]
See also shown in Figure 1, a kind of low temperature heat pump air conditioning system, comprise indoor unit, outdoor unit, in the present embodiment, described indoor unit comprises three indoor sets, first indoor set comprises that the first indoor set heat exchanger 1 and first indoor electric expansion valve 2, the second indoor sets comprise that the second indoor set heat exchanger 16 and second indoor electric expansion valve 17, the three indoor sets comprise the 3rd indoor set heat exchanger 18 and the 3rd indoor electric expansion valve 19.Outdoor unit comprises off-premises station heat exchanger 3, secondary cooling coil 4, gas-liquid separator 5, cross valve 6, first throttle device and compressor air compensating system, described first throttle device is composed in parallel with check valve 8 by outdoor electric expansion valve 7, described compressor air compensating system comprises second throttling arrangement, compressor 9, reservoir 10, described second throttling arrangement is composed in parallel by the EVI electric expansion valve 11 and second check valve 12, each assembly connects to form complete loops by copper pipe, the c interface of described reservoir 10 has connected second air entry that is connected to compressor 9 behind the EVI feather valve 13, and the c interface of described connection reservoir 10 and the copper pipe 15 of EVI feather valve 13 are drawn from reservoir 10 tops.Between the exhaust outlet of first air entry of compressor 9 and compressor 9, be connected with digital feather valve 14.In the present embodiment, compressor 9 is jet digital scroll compressors.
Seeing also shown in Figure 2ly, all is to connect by copper pipe between each parts in the low temperature heat pump air conditioning system.Low temperature heat pump air conditioning system is at unit at full capacity during heating operation, when just all indoor sets are all opened, and compressor 9 load runnings, this moment, the EVI feather valve 13 was opened, and digital feather valve 14 cuts out.Compressor 9 is compressed to intermediate pressure (state point 2) to the refrigerant gas (state point 1) of the low-temp low-pressure that is evaporated from off-premises station heat exchanger 3, gas (state point 9) with the intermediate pressure that sucks from compressor 9 second air entries in the scroll plate of compressor 9 is mixed into state point 10, continue then by the gas of compressor 9 boil down to HTHPs (state point 3), the refrigerant liquid (state point 4) that the refrigerant gas of HTHP is cooled and is condensed into HTHP after through three indoor set heat exchangers, highly pressurised liquid is to enter reservoir 10 behind the gas-liquid mixture (state point 5) of intermediate pressure by three indoor electric expansion valves and 11 throttlings of EVI electric expansion valve, the heat flash distillation of part of refrigerant GAS ABSORPTION refrigerant liquid is the refrigerant gas (state point 9) of intermediate pressure in reservoir 10, c interface from reservoir 10 passes through EVI feather valve 13 then, sucked by compressor 9 second air entries, another part refrigerant liquid is the subcooled liquid (state point 7) of intermediate pressure by crossing cold then in the reservoir 10, and then through secondary cooling coil 4 cooling and 7 throttlings of outdoor electric expansion valve, reach state point 8, the outer machine heat exchanger 3 of inlet chamber is evaporated to state point 1 again, pass through cross valve 6 and gas-liquid separator 5 then, sucked by compressor 9 first air entries at last, finish one and heat circulation.
When indoor units is partly opened, when whole unit is in operation at part load, compressor 9 discontinuous actings this moment, generator set controller draws ability need according to the unit load of opening, and draws according to work period of digital feather valve 14 time of digital feather valve 14 opening and closing.When digital feather valve 14 is opened, EVI feather valve 13 cuts out, make high and low pressure gas communicate, compressor 9 dynamic and static whirlpool dishes separate, compressor 9 does not do work, and this moment, compressor 9 did not spray intermediate-pressure gas because EVI feather valve 13 cuts out, whole unit is in the state of quitting work, thereby reaches energy-conservation purpose.After a period of time, digital feather valve 14 cuts out, and EVI feather valve 13 is opened, and whole unit is reworked, and has guaranteed that heating effect is unaffected.Unlatching by logarithmic code feather valve 14, close and control, make compressor 9 discontinuous actings, guaranteed that unit when operation at part load, can obtain good heating effect, can reach energy-conservation purpose again.
In the unit oepration at full load, the compressor running hours has sprayed the refrigerant gas of intermediate pressure to compressor, and can accurately control the injection of refrigerant amount, overcome the problem of worst cold case lower compression machine poor inspiration, guaranteed under worst cold case, to obtain good heating effect.When the unit operation at part load, this unit is by the interlocking action of EVI feather valve and digital feather valve, air injection enthalpy-increasing when realizing sub-load, the jet amount of compressor when accurately control section is loaded load, make it reach optimum value, make that unit can obtain good heating capacity when sub-load, also can improve the Energy Efficiency Ratio of unit simultaneously.
If those skilled in the art has made change unsubstantiality, conspicuous or improvement according to the utility model, all should belong to the scope of the utility model claim protection.
Claims (3)
1, a kind of low temperature heat pump air conditioning system, comprise indoor unit, outdoor unit, described indoor unit comprises at least one indoor set, described indoor set comprises indoor set heat exchanger and indoor electric expansion valve, outdoor unit comprises off-premises station heat exchanger (3), secondary cooling coil (4), gas-liquid separator (5), cross valve (6), first throttle device and compressor air compensating system, described first throttle device is composed in parallel by outdoor electric expansion valve (7) and check valve (8), described compressor air compensating system comprises second throttling arrangement, compressor (9), reservoir (10), described second throttling arrangement is composed in parallel by EVI electric expansion valve (11) and second check valve (12), each assembly connects to form complete loops by copper pipe, it is characterized in that: the c interface of described reservoir (10) has connected second air entry that is connected to compressor (9) behind the EVI feather valve (13), is connected with digital feather valve (14) between the exhaust outlet of first air entry of compressor (9) and compressor (9).
2, low temperature heat pump air conditioning system according to claim 1 is characterized in that: the copper pipe (15) of the c interface of described connection reservoir (10) and EVI feather valve (13) is drawn from reservoir (10) top.
3, low temperature heat pump air conditioning system according to claim 1 is characterized in that: described compressor (9) is jet digital scroll compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620060435 CN2926935Y (en) | 2006-06-14 | 2006-06-14 | Low-temperature heat pump air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620060435 CN2926935Y (en) | 2006-06-14 | 2006-06-14 | Low-temperature heat pump air conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2926935Y true CN2926935Y (en) | 2007-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620060435 Expired - Lifetime CN2926935Y (en) | 2006-06-14 | 2006-06-14 | Low-temperature heat pump air conditioning system |
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| Country | Link |
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| CN (1) | CN2926935Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673372A (en) * | 2012-09-07 | 2014-03-26 | 广东美的暖通设备有限公司 | Air conditioner heat pump system |
| CN103940138A (en) * | 2014-04-01 | 2014-07-23 | 广东美的暖通设备有限公司 | Air-cooled heat pump unit |
| CN104089347A (en) * | 2014-06-24 | 2014-10-08 | 广东申菱空调设备有限公司 | Low-temperature air-cooled water chiller unit and control method thereof |
| CN106871470A (en) * | 2017-02-05 | 2017-06-20 | 广东美的暖通设备有限公司 | The pressure regulating method of air-conditioning system and air-conditioning system |
| CN108444155A (en) * | 2018-06-14 | 2018-08-24 | 珠海格力电器股份有限公司 | Air conditioning system |
| CN109556309A (en) * | 2018-12-15 | 2019-04-02 | 广东顺德澳科菱热泵设备有限公司 | One kind having the intermediate double high efficiency heat pump systems of full liquid condensing |
-
2006
- 2006-06-14 CN CN 200620060435 patent/CN2926935Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673372A (en) * | 2012-09-07 | 2014-03-26 | 广东美的暖通设备有限公司 | Air conditioner heat pump system |
| CN103673372B (en) * | 2012-09-07 | 2016-02-17 | 广东美的暖通设备有限公司 | Air conditioner heat pump system |
| CN103940138A (en) * | 2014-04-01 | 2014-07-23 | 广东美的暖通设备有限公司 | Air-cooled heat pump unit |
| CN103940138B (en) * | 2014-04-01 | 2016-08-17 | 广东美的暖通设备有限公司 | Air-Cooled Heat Pump Unit |
| CN104089347A (en) * | 2014-06-24 | 2014-10-08 | 广东申菱空调设备有限公司 | Low-temperature air-cooled water chiller unit and control method thereof |
| CN106871470A (en) * | 2017-02-05 | 2017-06-20 | 广东美的暖通设备有限公司 | The pressure regulating method of air-conditioning system and air-conditioning system |
| CN106871470B (en) * | 2017-02-05 | 2019-06-04 | 广东美的暖通设备有限公司 | The pressure regulating method of air-conditioning system |
| CN108444155A (en) * | 2018-06-14 | 2018-08-24 | 珠海格力电器股份有限公司 | Air conditioning system |
| CN108444155B (en) * | 2018-06-14 | 2023-10-27 | 珠海格力电器股份有限公司 | Air Conditioning System |
| CN109556309A (en) * | 2018-12-15 | 2019-04-02 | 广东顺德澳科菱热泵设备有限公司 | One kind having the intermediate double high efficiency heat pump systems of full liquid condensing |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070725 |
|
| EXPY | Termination of patent right or utility model |