阅读说明：本技术 并联压缩机超低温度空气源热泵机组 (Parallel connection compressor ultra low temperature net for air-source heat pump units ) 是由 武晓宁 于 2019-08-24 设计创作，主要内容包括：本发明公开了一种并联压缩机超低温度空气源热泵机组,其包括机柜,机柜内部固定有换热器,换热器的顶部安装有轴流风机,机柜内部安装有一个冷凝器；机柜内部设置有电控箱和并联压缩机组件；并联压缩机组件和汽液分离器以及四通阀连接,四通阀的其它三个接口分别连接汽液分离器和冷凝器以及换热器；换热器靠近轴流风机设置,换热器后端和组合阀体连接至一体,组合阀体的底部和冷凝器连接至一体。本装置开机时通过温差计算出需要加载的压缩机数量来进行能量调节。当无能量加载需求时直接进入正常运行时的能量调节；有能量加载需求时每隔4秒开启一台压缩机,其使用环保制冷剂,不损害臭氧层；经济性好,换热器总成本可降低20%左右。(The invention discloses a kind of parallel connection compressor ultra low temperature net for air-source heat pump units comprising cabinet, interior of equipment cabinet are fixed with heat exchanger, and axial flow blower is equipped at the top of heat exchanger, and interior of equipment cabinet is equipped with a condenser；Interior of equipment cabinet is provided with electric cabinet and parallel compressor assembly；Parallel compressor assembly is connected with vapour liquid separator and four-way valve, and other three interfaces of four-way valve are separately connected vapour liquid separator and condenser and heat exchanger；Heat exchanger is arranged close to axial flow blower, and heat exchanger rear end and combinaing valve body are connected to one, and the bottom of combinaing valve body and condenser are connected to one.Go out number of compressors to be loaded is needed to carry out energy adjustment by differential thermal calculation when the present apparatus is switched on.Energy adjustment when being directly entered normal operation when noenergy loads demand；There is energy, every 4 seconds one compressors of unlatching, to use environmental protection refrigerant when loading demand, do not damage ozone layer；Good economy performance, heat exchanger totle drilling cost can reduce by 20% or so.)

1. a kind of parallel connection compressor ultra low temperature net for air-source heat pump units, including cabinet, interior of equipment cabinet are fixed with heat exchanger, heat exchange Axial flow blower is installed, interior of equipment cabinet is equipped with a condenser below heat exchanger at the top of device；It is characterized by: cabinet It is internally provided with electric cabinet and parallel compressor assembly；Parallel compressor assembly is connected with vapour liquid separator and four-way valve, institute Other three interfaces in four interfaces of the four-way valve stated are separately connected vapour liquid separator and condenser and heat exchanger；Heat exchange Device is arranged close to axial flow blower, and heat exchanger rear end and combinaing valve body are connected to one, and the bottom of combinaing valve body is connected with condenser To one；It goes after being connected with liquid storage device and filter into a circulation loop left and right ends of the combinaing valve body.

2. parallel connection compressor ultra low temperature net for air-source heat pump units according to claim 1, it is characterised in that: every compression A hydrojet ducting module is increased between machine and liquid condensation pipeline, it includes connection solenoid valve, liquid injection valve and compressors More copper pipes and control liquid injection valve open and close and open size terminal box controller and be fixed on the compressor exhaust pipe Exhaust gas temperature sensor.

3. parallel connection compressor ultra low temperature net for air-source heat pump units according to claim 1, it is characterised in that: it is described and Connection compressor assembly is made of multiple compressors；Its parallel is as follows: the exhaust pipe of every compressor is linked in jointly On the same exhaust pipe；The muffler of every compressor is also linked on the same muffler jointly；The oil sump of every compressor It is interconnected with same root oil balance tube.

4. parallel connection compressor ultra low temperature net for air-source heat pump units according to claim 1, it is characterised in that: the group Closing on valve body includes two check valves and two throttle valve settings, wherein constituting one by a check valve and a throttle valve Series arm, two series arm parallel connection rows are at a combinaing valve body；The throttle valve is swollen using heating power expansion valve or electronics Swollen valve or capillary.

Technical field

The present invention relates to the freezing of central air-conditioning and household, heating and hot-water heating systems, are especially a kind of parallel connection compressor Ultra low temperature net for air-source heat pump units.

Background technique

Currently, mainly passing through fire coal, fuel oil, combustion gas, heat pump unit and electricity in cold winter in the northern area of China Heating obtains hot water for life, and existing way obtains the mode of hot water, and there is drawbacks, is mainly reflected in the following aspects:

1. energy consumption is high, not environmentally；It is serious to air pollution using fire coal；Using combustion gas, fuel oil or electric heating energy consumption Height is even more to have the harm of destruction to ozone layer using for example fluorine-containing substance of common heat pump unit its thermal conducting agent.

2. existing normal air source heat pump unit thermal conducting agent freezing point is high, cooling rate is slower in the unit time, constant entropy Compression ratio function is big, so that compressor operating is difficult, is unfavorable for compressor service life.

3. cannot achieve low temperature environment heating.

4. net for air-source heat pump units only has the short time to run under full load, the most of the time all transports at part load Row, and the corresponding unit heat exchanger of a compressor of common net for air-source heat pump units forms independent refrigeration system, presses When contracting machine is shut down, heat exchanger does not also work, and heat exchanger can only work under the full load of corresponding compressor, cause condensation temperature compared with High and evaporating temperature is lower, works so that unit is constantly under lower Energy Efficiency Ratio, causes a large amount of energy wave Take.

How by effectively being improved to existing normal air source heat pump unit, it can be made at part load When work, the heat exchange area of whole heat exchangers is efficiently used, so that condensation temperature is greatly reduced, evaporating temperature is greatly improved, from And unit heating Integrated part-load value IPLV is greatly improved, reach energy-saving target.It is existing current row above The technical issues of industry technical staff urgently improves.

Summary of the invention

In view of the problems of the existing technology, the object of the present invention is to provide a kind of parallel connection compressor ultra low temperature air-sources Heat pump unit can reach higher unit operation heating Integrated part-load value IPLV by technological improvement, thus It can be effectively reduced energy consumption, no pollution to the environment, use cost is low, is conducive to compressor and operates and can realize at low ambient temperatures The effect of heating.

To achieve the goals above, The technical solution adopted by the invention is as follows: a kind of parallel connection compressor ultra low temperature air Source heat pump unit, including cabinet, interior of equipment cabinet are fixed with heat exchanger, are equipped with axial flow blower at the top of heat exchanger, interior of equipment cabinet, One condenser is installed below heat exchanger；Interior of equipment cabinet is provided with electric cabinet and parallel compressor assembly；Parallel connection compressor Component is connected with vapour liquid separator and four-way valve, and other three interfaces in four interfaces of the four-way valve are separately connected Vapour liquid separator and condenser and heat exchanger；Heat exchanger is arranged close to axial flow blower, and heat exchanger rear end is connected with combinaing valve body To one, the bottom of combinaing valve body and condenser are connected to one；The left and right ends of the combinaing valve body and liquid storage device and It goes after filter connection into a circulation loop.

A hydrojet ducting module is increased between every compressor and liquid condensation pipeline, it includes connection solenoid valve, It more copper pipes of liquid injection valve and compressor and control liquid injection valve open and close and opens the terminal box controller of size and is fixed on this Exhaust gas temperature sensor on compressor exhaust pipe.

The parallel compressor assembly is made of multiple compressors；Its parallel is as follows: every compressor Exhaust pipe is linked in jointly on the same exhaust pipe；The muffler of every compressor is also linked on the same muffler jointly； The oil sump of every compressor is interconnected with same root oil balance tube.

It include two check valves and two throttle valve settings on the combinaing valve body, wherein passing through a check valve and one A throttle valve constitutes a series arm, and two series arm parallel connection rows are at a combinaing valve body；The throttle valve is using warm Power expansion valve or electric expansion valve or capillary.

Beneficial effects of the present invention: parallel compressor assembly can be used by Improvement in the present invention, achieved beneficial Effect is 1. using environmental protection refrigerant, does not damage ozone layer；2. good economy performance, heat exchanger totle drilling cost can reduce by 20% or so；3. It is energy-efficient, there is lower fluid density, higher vapour density, the higher latent heat of vaporization to make unit under identical frame With bigger cooling capacity.There is smaller pressure drop in heat exchanger, leads to lower condensation temperature and higher evaporating temperature, thus System is allowed to obtain higher heating Integrated part-load value IPLV；Operation energy consumption reduces by 30% or so.Isentropic Compression ratio Function is small, so that compressor operating is lighter, extends compressor service life, and molecular weight is small, and good fluidity, discharge pressure is lower, Reduce compressor load；4. low temperature environment heating, hot environment water heating can produce under minimum -30 DEG C of environment temperature Domestic hot-water and heating.

Detailed description of the invention

The present invention is further detailed with reference to the accompanying drawing:

Fig. 1 is schematic view of the front view of the present invention；

Fig. 2 is side structure schematic view of the present invention；

Fig. 3 is present invention looks up structural representation of the present invention；

Fig. 4 is present system schematic diagram；

In attached drawing, 1, finned heat exchanger, 2, axial flow blower, 3, cabinet, 4, condenser, 5, liquid storage device, 6, vapour liquid separator, 7, parallel compressor assembly, 71, solenoid valve, 72, liquid injection valve, 73, copper pipe, 74, terminal box controller, 75, delivery temperature sensing Device, 76, compressor, 77, exhaust pipe, 78, muffler, 8, electric cabinet, 9, four-way valve, 10, filter, 11, check valve, 12, section Flow valve.

Specific embodiment

In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing, to the present invention into Row is further described.It should be appreciated that the specific embodiments described herein are only used to explain the present invention, it is not used to Limit the present invention.

A kind of parallel connection compressor ultra low temperature net for air-source heat pump units, as shown in the picture, outer framework and existing ordinary hot Pump assembly construction is identical comprising cabinet 3 is fixed with finned heat exchanger 1 inside cabinet 3, and the top of finned heat exchanger 1 is equipped with Axial flow blower 2, inside cabinet 3, the lower section of heat exchanger 1 is equipped with a condenser 4；Cabinet 3 is internally provided with electric cabinet 8 and simultaneously Join compressor assembly 7；Parallel compressor assembly 7 and the connection of vapour liquid separator 6 and four-way valve 9, four of the four-way valve 9 Other three interfaces in interface are separately connected vapour liquid separator 6 and condenser 4 and finned heat exchanger 1；Finned heat exchanger 1 leans on Paraxial flow fan 2 is arranged, and 1 rear end of finned heat exchanger and combinaing valve body are connected to one, the bottom of combinaing valve body and fin condensation Device 1 is connected to one；Row is followed at one behind the left and right ends of the combinaing valve body and the connection of liquid storage device 5 and filter 10 Loop back path；

As shown in figure 4, including that two check valves 11 and two throttle valves 12 are arranged on the combinaing valve body, wherein passing through One check valve 11 and a throttle valve 12 constitute a series arm, and two series arm parallel connection rows are at a combinaing valve body； Because the unit compressor standard-sized sheet when operating pressure it is higher, the throttle valve 12 uses high voltage bearing heating power throttle valve or electronics Throttle valve, preferred electronic throttle under frequency conversion setting.

The Research Emphasis of product of the present invention is the use of parallel compressor assembly 7, as shown in figure 4, parallel compressor unit Part is arranged in parallel by two or more separate compressors, and the present invention is explained so that four compressors are in parallel as an example, every compression The exhaust pipe of machine 76 is linked in jointly on the same exhaust pipe 77；The muffler 78 of every compressor 76 is also linked in same jointly On a muffler 78；The oil sump 80 of every compressor is interconnected with same root oil balance tube 79；The right side of parallel compressor assembly Side is vapour liquid separator 6 and liquid storage device 5, recycles running to adapt to the hydrojet of environmental protection refrigerant, spy is in every compressor 76 and liquid 1 hydrojet ducting module 7 for aiming at the circulation of cooperation hydrojet refrigerant and designing is increased between state condenser pipe, described is every 7 structure of hydrojet ducting module being equipped on compressor is identical, and specific connection type is as follows:

Solenoid valve 71 is connected on copper pipe 73, the rear of solenoid valve 71 is liquid injection valve 72, and liquid injection valve 72 and compressor 76 are logical The connection of copper pipe 73 is crossed, compressor 76 is connected by copper pipe 73 and external vapour liquid separator 6 and the four-way valve 9 of outside, four-way An exhaust gas temperature sensor 75, exhaust gas temperature sensor 75 and liquid injection valve are fixed on the pipeline that valve 9 and compressor 76 connect It is connected by terminal box controller 74 with conducting wire between 72, and is fixed with terminal box controller 74 on compressor 76.

The working principle of the invention is: when the invention works, it is small from the copper pipe 73 drawn in condenser pipe to branch out one Partial high pressure refrigerant liquid is entered after solenoid valve 71 by liquid injection valve 72 in the mouth spray of compressor 76, and scroll compression is sprayed into The intermediate cavity of contracting machine 76, to effectively cool down and reduce delivery temperature, hydrojet ducting module 7 passes through pipeline and vapour liquid separator 6 And external four-way valve 9 connects, and is fixed with an exhaust gas temperature sensor on the pipeline that four-way valve 9 and compressor 76 connect 75, it is connected by terminal box controller 74 with conducting wire between exhaust gas temperature sensor 75 and liquid injection valve 72, and in compressor 76 On be fixed with terminal box controller 74, effect is to control liquid injection valve 72 by exhaust gas temperature sensor 75 to spray into 76 whirlpool of compressor The spouting liquid of capstan intermediate cavity, four-way valve 9 connects again with external finned heat exchanger 1 and condenser 4 and existing common sky Adjust unit identical, it is entire to complete by the mating reaction between check valve 11 and throttle valve 12 and liquid storage device and filter Refrigeration or heating operations.