CN109780748A - Air-supplemented ultra-low ambient temperature air source heat pump unit and its heating and cooling operation method - Google Patents
Air-supplemented ultra-low ambient temperature air source heat pump unit and its heating and cooling operation method Download PDFInfo
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- CN109780748A CN109780748A CN201910194748.2A CN201910194748A CN109780748A CN 109780748 A CN109780748 A CN 109780748A CN 201910194748 A CN201910194748 A CN 201910194748A CN 109780748 A CN109780748 A CN 109780748A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000001816 cooling Methods 0.000 title abstract description 5
- 238000005096 rolling process Methods 0.000 claims abstract description 22
- 239000003507 refrigerant Substances 0.000 claims description 65
- 238000006243 chemical reaction Methods 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 27
- 238000005057 refrigeration Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 230000009469 supplementation Effects 0.000 abstract 1
- 230000007246 mechanism Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
本发明公开了一种补气型超低环温空气源热泵机组及其制热制冷运行方法，所述机组包括主路大容量变频补气型压缩机、主路膨胀阀、室内换热器、补气路电磁阀、补气路膨胀阀、辅助膨胀阀、室外换热器、经济器、辅助小容量滚动转子压缩机和四通换向阀。本发明的补气型超低环温空气源热泵机组除了实现制冷运行外，在供暖期间实现不同室外气温的单台压缩机运行和两台压缩机补气型运行两种工作模式自动切换，在室外气温相对较高时，可单台压缩机变频运行，而在室外气温更低时，通过小容量压缩机为经济器提供外部能源，大容量压缩机补气运行，一方面提高机组运行性能，另一方面将大容量压缩机的供热能力提高32%。
The invention discloses an air supply type ultra-low ambient temperature air source heat pump unit and a heating and cooling operation method thereof. The unit comprises a main circuit large-capacity variable frequency air supply type compressor, a main circuit expansion valve, an indoor heat exchanger, Supplementary air solenoid valve, supplementary air expansion valve, auxiliary expansion valve, outdoor heat exchanger, economizer, auxiliary small-capacity rolling rotor compressor and four-way reversing valve. In addition to the cooling operation, the air supply type ultra-low ambient temperature air source heat pump unit of the present invention realizes automatic switching between two working modes of single compressor operation with different outdoor temperatures and two compressor air supply type operation during the heating period. When the outdoor temperature is relatively high, a single compressor can be operated at variable frequency, and when the outdoor temperature is low, the small-capacity compressor provides external energy for the economizer, and the large-capacity compressor operates with air supplementation, which improves the operating performance of the unit. On the other hand, the heating capacity of the large-capacity compressor is increased by 32%.
Description
Technical field
The present invention relates to a kind of blowdown ultra-low-loop temperature air source heat pump unit and its heating refrigerating operation methods, specifically relate to
And a kind of blowdown ultra-low-loop temperature air source heat pump unit and its heating refrigeration for introducing extra power for economizer by heat pump
Operation method.
Background technique
" coal changes clean energy resource " is actively carried out by country at present, air source heat pump heating gradually in northern heating area application,
But since severe cold area winter outside air temperature is lower, building load is bigger, causes the work compression ratio of heat pump compressor to increase, leads
It causes Energy Efficiency Ratio low and the problem of heating capacity deficiency, especially extreme severe cold weather can only select bigger compressor, seriously thus
Improve cost.In this way, the leading usual indoor heat load of In The Initial Period Of Heating and latter stage is smaller, and unit is in In The Initial Period Of Heating and latter stage accounting for
Long-term underrun, causes low load with strong power.
Summary of the invention
The object of the present invention is to provide one kind to be suitable for low-temperature region, can be run according to outside air temperature height different mechanisms
Blowdown ultra-low-loop temperature air source heat pump unit and its heating refrigerating operation method with heat-pump-type economizer.The unit is in room
When the relatively high In The Initial Period Of Heating of outer temperature and latter stage, with the operation of single compressor mechanism；And in the lower heating of outside air temperature
Period is that economizer introduces extra power by heat pump, with the operation of two compressor blowdown mechanism, in large capacity compressor work
Make state it is constant when, unit heating capacity can be improved 32% even higher, meet heating requirement of the unit under ultra-low temperature surroundings.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of blowdown ultra-low-loop temperature air source heat pump unit, including the expansion of main road large capacity frequency conversion blowdown compressor, main road
Valve, indoor heat exchanger, tonifying Qi way solenoid valve, tonifying Qi road expansion valve, auxiliary expansion valve, outdoor heat exchanger, economizer, auxiliary little Rong
Measure compressor with rolling rotor and four-way reversing valve, in which:
The first interface of the four-way reversing valve is connect with the air entry of main road large capacity frequency conversion blowdown compressor, four-way commutation
The second interface of valve and one end of indoor heat exchanger connect, the third interface and main road large capacity frequency conversion blowdown of four-way reversing valve
The exhaust outlet of compressor connects, and the 4th interface of four-way reversing valve and main road one end of outdoor heat exchanger connect；
The another of the indoor heat exchanger is terminated with two-way branch, wherein branch directly connects with one end of tonifying Qi way solenoid valve all the way
It connects, the other end of tonifying Qi way solenoid valve is connect with one end of tonifying Qi road expansion valve, the other end and economizer of tonifying Qi road expansion valve
First interface connection, the second interface of economizer connect with the gas supplementing opening of main road large capacity frequency conversion blowdown compressor；It is another
Road branch is connect with one end of main road expansion valve, and the other end of main road expansion valve and the main road other end of outdoor heat exchanger connect；
The exhaust outlet of the auxiliary low capacity compressor with rolling rotor and the third interface of economizer connect, and the 4th of economizer connects
Mouth is connect with one end of auxiliary expansion valve, and the other end of auxiliary expansion valve and bypass one end of outdoor heat exchanger connect, and outdoor is changed
The bypass other end of hot device is connect with the air entry of auxiliary low capacity compressor with rolling rotor.
A kind of heating refrigerating operation method of above-mentioned blowdown ultra-low-loop temperature air source heat pump unit, including following three kinds of fortune
Row method:
One, heating single compressor operation:
Outside air temperature is greater than set temperature, and tonifying Qi way solenoid valve is closed, and auxiliary low capacity compressor with rolling rotor does not work, low temperature
The gas refrigerant of low pressure, at the refrigerant gas of high temperature and pressure, passes through four through main road large capacity frequency conversion blowdown compressor compresses
Heat exchanger is entered the room after logical reversal valve, the gas refrigerant of high temperature and pressure is condensed into the refrigerant liquid of high temperature and pressure, from
Indoor heat exchanger enters the refrigerant liquid that main road expansion valve becomes low-temp low-pressure after coming out, subsequently into outdoor heat exchanger, inhale
It receives outdoor heat and becomes low-pressure gas, by four-way reversing valve, be finally again sucked into the compression of main road large capacity frequency conversion blowdown
Machine, so on circulate.
Two, two compressor blowdowns of heating operation:
When outside air temperature is less than or equal to set temperature, tonifying Qi way solenoid valve is opened, and low capacity compressor with rolling rotor work is assisted
Make；The refrigerant liquid of the high temperature and pressure come out from indoor heat exchanger is divided into two-way, enters main road expansion valve, subsequent process all the way
Consistent with single compressor operational mode, another way enters tonifying Qi road expansion valve by tonifying Qi way solenoid valve and throttles, then
The heat of auxiliary circulation Loop Liquid refrigerant is absorbed in economizer, to become gas refrigerant, subsequently into main road great Rong
Quantitative change frequency blowdown compressor mixes the gas refrigeration for being further compressed into high temperature and pressure with the gas refrigerant that main road absorbs
Agent finally enters the refrigerant liquid that indoor heat exchanger heat release becomes high temperature and pressure, so on circulate；
In auxiliary refrigerant cycle circuit, for gas refrigerant after economizer heat release is to the liquid refrigerant on tonifying Qi road, process is auxiliary
It helps expansion valve throttling to become liquid refrigerant, subsequently enters the gas system that the outer heat of outdoor heat exchanger absorption chamber becomes low-temp low-pressure
Cryogen subsequently enters the gas refrigerant that auxiliary low capacity compressor with rolling rotor is compressed into high temperature and pressure, is finally again introduced into
Economizer carries out exothermic condensation process, so on circulate.
Three, refrigerating operaton:
Tonifying Qi way solenoid valve is closed, and the gas refrigerant of low-temp low-pressure is through main road large capacity frequency conversion blowdown compressor compresses at height
The refrigerant gas of warm high pressure enters outdoor heat exchanger using four-way reversing valve, is condensed into high temperature height by outdoor environment heat exchange
The refrigerant liquid of pressure, then passes through main road expansion valve and carries out throttling process and become the refrigerant liquid of low-temp low-pressure, then into
Enter indoor heat exchanger, absorb the gas refrigerant that heat becomes low-temp low-pressure, again passes by four-way after coming out from indoor heat exchanger
Reversal valve is finally again sucked into main road large capacity frequency conversion blowdown compressor, so on circulate.
Compared with the prior art, the present invention has the advantage that
1, the single compressor operation and two compressor blowdowns that different outside air temperatures are realized during heating run two kinds of works
Operation mode automatically switches, when outside air temperature is relatively high, can single compressor converting operation, and when outside air temperature is lower,
Extra power is provided for economizer by low capacity compressor, on the one hand large capacity compressor tonifying Qi operation improves unit operation
On the other hand the heat capacity of large capacity compressor is improved 32% by performance.
2, the condensation temperature of the independent refrigerant circulation loop in economizer side is lower, and compression ratio is small, and low capacity compressor is set
It is small to set the increased wasted work of institute, provides refrigerant institute's calorific requirement on tonifying Qi road not only to meet the mixing with main road, reduced heat waste
It loses, while bigger can improve the heating load of indoor condenser.
3, when winter runs, the independent auxiliary refrigerant cycle circuit in economizer side and main road share evaporator, save wind
Machine space.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of blowdown ultra-low-loop temperature air source heat pump unit of the present invention, in figure: 1- main road large capacity
Frequency conversion blowdown compressor；2- indoor heat exchanger；3- main road expansion valve；4- outdoor heat exchanger；5- tonifying Qi road expansion valve；6- is economical
Device；7- auxiliary expansion valve；8- assists low capacity compressor with rolling rotor；9- tonifying Qi way solenoid valve；10- four-way reversing valve.
Specific embodiment
Further description of the technical solution of the present invention with reference to the accompanying drawing, and however, it is not limited to this, all to this
Inventive technique scheme is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be covered
Within the protection scope of the present invention.
The present invention provides a kind of blowdown ultra-low-loop temperature air source heat for introducing extra power for economizer by heat pump
Pump assembly, as shown in Figure 1, the blowdown ultra-low-loop temperature air source heat pump unit includes the compression of main road large capacity frequency conversion blowdown
It is machine 1, indoor heat exchanger 2, main road expansion valve 3, outdoor heat exchanger 4, tonifying Qi road expansion valve 5, economizer 6, auxiliary expansion valve 7, auxiliary
Help low capacity compressor with rolling rotor 8, tonifying Qi way solenoid valve 9 and four-way reversing valve 10, in which:
The first interface 10a of the four-way reversing valve 10 is connect with the air entry of main road large capacity frequency conversion blowdown compressor 1, and four
The second interface 10b of logical reversal valve 10 is connect with one end of indoor heat exchanger 2, the third interface 10c of four-way reversing valve 10 and master
The exhaust outlet of road large capacity frequency conversion blowdown compressor 1 connects, the 4th interface 10d and outdoor heat exchanger 4 of four-way reversing valve 10
The connection of main road one end, and under heating mode, first interface 10a is connected to the 4th interface 10d, and second interface 10b connects with third
Mouth 10c is connected to, and under refrigeration mode, first interface 10a is connected to second interface 10b, and third interface 10c and the 4th interface 10d connect
It is logical；
The another of the indoor heat exchanger 2 is terminated with two-way branch, wherein the one end of branch directly with tonifying Qi way solenoid valve 9 all the way
Connection, the other end of tonifying Qi way solenoid valve 9 are connect with one end of tonifying Qi road expansion valve 5, the other end and warp of tonifying Qi road expansion valve 5
The first interface 6a connection of Ji device 6, the tonifying Qi of the second interface 6b and main road large capacity frequency conversion blowdown compressor 1 of economizer 6
Mouth connection；Another way branch is connect with one end of main road expansion valve 3, the other end of main road expansion valve 3 and the master of outdoor heat exchanger 4
The connection of the road other end；
The exhaust outlet of the auxiliary low capacity compressor with rolling rotor 8 is connect with the third interface 6c of economizer 6, economizer 6
4th interface 6d is connect with one end of auxiliary expansion valve 7, the other end of auxiliary expansion valve 7 and bypass one end of outdoor heat exchanger 4
The bypass other end of connection, outdoor heat exchanger 4 is connect with the air entry of auxiliary low capacity compressor with rolling rotor 8.
In the present invention, the main road large capacity frequency conversion blowdown compressor 1 and auxiliary low capacity compressor with rolling rotor 8 exist
The heating capacity ratio under the two compressor methods of operation is heated between 3 ~ 5.
In the present invention, the main road expansion valve 3, tonifying Qi road expansion valve 5 and auxiliary expansion valve 7 may each be thermal expansion
Any one of valve, restricting orifice, capillary, electric expansion valve.
In the present invention, main road circulation and auxiliary refrigerant cycle circuit share an outdoor heat exchanger 4.
In the present invention, in a heating mode, outdoor heat exchanger 4 is functionally equivalent to evaporator, indoor heat exchanger 2 to unit
It is equivalent to condenser；In cooling mode, outdoor heat exchanger 4 is functionally equivalent to condenser, and indoor heat exchanger 2 is equivalent to steaming
Send out device.
Blowdown low-temperature air source heat pump unit of the present invention with heat-pump-type economizer is in heating cooling operation mode point
It realizes and runs for following three kinds of methods, specific workflow is as follows:
1, heating single compressor operation
General outside air temperature is relatively high at this time, and outside air temperature is greater than set temperature, and tonifying Qi way solenoid valve 9 is closed, and assists little Rong
Amount compressor with rolling rotor 8 does not work, and the gas refrigerant of low-temp low-pressure is compressed through main road large capacity frequency conversion blowdown compressor 1
At the refrigerant gas of high temperature and pressure, by entering the room heat exchanger 2, the gas refrigerant of high temperature and pressure after four-way reversing valve 10
It is condensed into the refrigerant liquid of high temperature and pressure, enters main road expansion valve 3 after coming out from indoor heat exchanger 2 and becomes low-temp low-pressure
Refrigerant liquid, subsequently into outdoor heat exchanger 4, the outer heat of absorption chamber becomes low-pressure gas, by four-way reversing valve 10, finally
It is again sucked into main road large capacity frequency conversion blowdown compressor 1, so on circulate.
2, two compressor blowdowns of heating operation
When outside air temperature is less than or equal to set temperature, tonifying Qi way solenoid valve 9 is opened, and low capacity compressor with rolling rotor 8 is assisted
Work.The refrigerant liquid of the high temperature and pressure come out from indoor heat exchanger 2 is divided into two-way, enters main road expansion valve 3 all the way, then
Process is consistent with single compressor operational mode, and another way is saved by tonifying Qi way solenoid valve 9 into tonifying Qi road expansion valve 5
Stream then absorbs the heat of another independent auxiliary circulation Loop Liquid refrigerant, to become gas refrigeration in economizer 6
Agent is mixed with the gas refrigerant that main road absorbs subsequently into main road large capacity frequency conversion blowdown compressor 1 and is further compressed
At the gas refrigerant of high temperature and pressure, the refrigerant liquid that 2 heat release of indoor heat exchanger becomes high temperature and pressure is finally entered, it is so past
Multiple circulation.
There are independent auxiliary refrigerant cycle circuits for the economizer other side: gas refrigerant is in 6 heat release of economizer to benefit
After the liquid refrigerant of gas circuit, becomes liquid refrigerant by the throttling of auxiliary expansion valve 7, subsequently enter the absorption of outdoor heat exchanger 4
Outdoor heat becomes the gas refrigerant of low-temp low-pressure, subsequently enters auxiliary low capacity compressor with rolling rotor 8 and is compressed into high temperature
The gas refrigerant of high pressure is finally again introduced into economizer 6 and carries out exothermic condensation process, so on circulate.
3, refrigerating operaton
When needing to freeze, tonifying Qi way solenoid valve 9 is closed, and the gas refrigerant of low-temp low-pressure is through main road large capacity frequency conversion blowdown
Compressor 1 is compressed into the refrigerant gas of high temperature and pressure, enters outdoor heat exchanger 4 using four-way reversing valve 10, by outdoor ring
Border, which exchanges heat, is condensed into the refrigerant liquid of high temperature and pressure, then passes through the progress of main road expansion valve 3 throttling process and becomes low-temp low-pressure
Refrigerant liquid the gas refrigerant that heat becomes low-temp low-pressure is absorbed, from indoor heat exchange subsequently into indoor heat exchanger 2
Device again passes by four-way reversing valve 10 after coming out, and is finally again sucked into main road large capacity frequency conversion blowdown compressor 1, so past
Multiple circulation.
Claims (7)
1. a kind of blowdown ultra-low-loop temperature air source heat pump unit, it is characterised in that the unit includes that main road large capacity frequency conversion is mended
Gas type compressor, main road expansion valve, indoor heat exchanger, tonifying Qi way solenoid valve, tonifying Qi road expansion valve, auxiliary expansion valve, outdoor are changed
Hot device, economizer, auxiliary low capacity compressor with rolling rotor and four-way reversing valve, in which:
The first interface of the four-way reversing valve is connect with the air entry of main road large capacity frequency conversion blowdown compressor, four-way commutation
The second interface of valve and one end of indoor heat exchanger connect, the third interface and main road large capacity frequency conversion blowdown of four-way reversing valve
The exhaust outlet of compressor connects, and the 4th interface of four-way reversing valve and main road one end of outdoor heat exchanger connect；
The another of the indoor heat exchanger is terminated with two-way branch, wherein branch directly connects with one end of tonifying Qi way solenoid valve all the way
It connects, the other end of tonifying Qi way solenoid valve is connect with one end of tonifying Qi road expansion valve, the other end and economizer of tonifying Qi road expansion valve
First interface connection, the second interface of economizer connect with the gas supplementing opening of main road large capacity frequency conversion blowdown compressor；It is another
Road branch is connect with one end of main road expansion valve, and the other end of main road expansion valve and the main road other end of outdoor heat exchanger connect；
The exhaust outlet of the auxiliary low capacity compressor with rolling rotor and the third interface of economizer connect, and the 4th of economizer connects
Mouth is connect with one end of auxiliary expansion valve, and the other end of auxiliary expansion valve and bypass one end of outdoor heat exchanger connect, and outdoor is changed
The bypass other end of hot device is connect with the air entry of auxiliary low capacity compressor with rolling rotor.
2. blowdown ultra-low-loop temperature air source heat pump unit according to claim 1, it is characterised in that the unit heating
Under mode, the first interface of four-way reversing valve and the 4th orifice, second interface and third orifice；Under refrigeration mode,
The first interface of four-way reversing valve is connected to second interface, third interface and the 4th orifice.
3. blowdown ultra-low-loop temperature air source heat pump unit according to claim 1, it is characterised in that the main road great Rong
The heating capacity ratio of quantitative change frequency blowdown compressor and auxiliary low capacity compressor with rolling rotor is between 3 ~ 5.
4. blowdown ultra-low-loop temperature air source heat pump unit according to claim 1, it is characterised in that the main road expansion
Valve, tonifying Qi road expansion valve and auxiliary expansion valve be heating power expansion valve, restricting orifice, capillary, electric expansion valve it is any
It is a kind of.
5. the heating operation of blowdown ultra-low-loop temperature air source heat pump unit described in a kind of claim 1-4 any claim
Method, it is characterised in that the heating operation method is the heating single compressor method of operation, the specific operation is as follows:
Outside air temperature is greater than set temperature, and tonifying Qi way solenoid valve is closed, and auxiliary low capacity compressor with rolling rotor does not work, low temperature
The gas refrigerant of low pressure, at the refrigerant gas of high temperature and pressure, passes through four through main road large capacity frequency conversion blowdown compressor compresses
Heat exchanger is entered the room after logical reversal valve, the gas refrigerant of high temperature and pressure is condensed into the refrigerant liquid of high temperature and pressure, from
Indoor heat exchanger enters the refrigerant liquid that main road expansion valve becomes low-temp low-pressure after coming out, subsequently into outdoor heat exchanger, inhale
It receives outdoor heat and becomes low-pressure gas, by four-way reversing valve, be finally again sucked into the compression of main road large capacity frequency conversion blowdown
Machine, so on circulate.
6. the heating operation of blowdown ultra-low-loop temperature air source heat pump unit described in a kind of claim 1-4 any claim
Method, it is characterised in that the heating operation method is the two compressor blowdown methods of operation of heating, and carrying out practically mode is such as
Under:
When outside air temperature is less than or equal to set temperature, tonifying Qi way solenoid valve is opened, and low capacity compressor with rolling rotor work is assisted
Make；The refrigerant liquid of the high temperature and pressure come out from indoor heat exchanger is divided into two-way, enters main road expansion valve, subsequent process all the way
Consistent with single compressor operational mode, another way enters tonifying Qi road expansion valve by tonifying Qi way solenoid valve and throttles, then
The heat of auxiliary circulation Loop Liquid refrigerant is absorbed in economizer, to become gas refrigerant, subsequently into main road great Rong
Quantitative change frequency blowdown compressor mixes the gas refrigeration for being further compressed into high temperature and pressure with the gas refrigerant that main road absorbs
Agent finally enters the refrigerant liquid that indoor heat exchanger heat release becomes high temperature and pressure, so on circulate；
In auxiliary refrigerant cycle circuit, for gas refrigerant after economizer heat release is to the liquid refrigerant on tonifying Qi road, process is auxiliary
It helps expansion valve throttling to become liquid refrigerant, subsequently enters the gas system that the outer heat of outdoor heat exchanger absorption chamber becomes low-temp low-pressure
Cryogen subsequently enters the gas refrigerant that auxiliary low capacity compressor with rolling rotor is compressed into high temperature and pressure, is finally again introduced into
Economizer carries out exothermic condensation process, so on circulate.
7. the refrigerating operaton of blowdown ultra-low-loop temperature air source heat pump unit described in a kind of claim 1-4 any claim
Method, it is characterised in that the refrigerating operation method is as follows:
Tonifying Qi way solenoid valve is closed, and the gas refrigerant of low-temp low-pressure is through main road large capacity frequency conversion blowdown compressor compresses at height
The refrigerant gas of warm high pressure enters outdoor heat exchanger using four-way reversing valve, is condensed into high temperature height by outdoor environment heat exchange
The refrigerant liquid of pressure, then passes through main road expansion valve and carries out throttling process and become the refrigerant liquid of low-temp low-pressure, then into
Enter indoor heat exchanger, absorb the gas refrigerant that heat becomes low-temp low-pressure, again passes by four-way after coming out from indoor heat exchanger
Reversal valve is finally again sucked into main road large capacity frequency conversion blowdown compressor, so on circulate.
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| CN201910194748.2A CN109780748B (en) | 2019-03-14 | 2019-03-14 | Air-supplementing type ultralow-loop-temperature air source heat pump unit and heating and refrigerating operation method thereof |
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