CN209246450U - A kind of low pressure heat pump air-breathing supercharging device - Google Patents

Abstract

The utility model discloses a kind of low pressure heat pump air-breathing supercharging devices, including main compressor, oil eliminator, four-way reversing valve, air-cooled condenser, liquid filter, shell and tube evaporator, Flash Type economizer, oil pump, oil cooler and intermediate compressor, the utility model passes through setting intergrade compressor, increase turbine centrifugal supercharging device or mixed flow centrifugation supercharging device, realize the pressure of inspiration(Pi) pressurization of the main compressor under extremely low environment temperature, realize the problem of compressed content product of compressor intermediate fill gas mouth or air injection enthalpy-increasing mouth is than that can adjust at any time and change at any time.

Description

A kind of low pressure heat pump air-breathing supercharging device

Technical field

The utility model relates to technical field of refrigeration equipment, and in particular to a kind of low pressure heat pump air-breathing supercharging device.

Background technique

The refrigeration system of usual air source heat pump unit realizes " quasi- second level " compression using economizer tonifying Qi circuit, air-cooled The refrigeration system of vortex heat pump unit realizes " quasi- second level " compression using air injection enthalpy-increasing circuit, can effectively improve in low environment Unit refrigerating capacity (cooling condition operation), heating capacity (heating condition operation) and machine under the high-head operating condition of temperature heating Group operational efficiency.

The economizer gas supplementing opening of compressor or the pressure of air injection enthalpy-increasing mouth depend on the compressed content product ratio of its physical location Design, in the various variable parameter operations of refrigeration system, the pressure and suction of compressor economizer gas supplementing opening or air injection enthalpy-increasing mouth It is in substantially stationary ratio between atmospheric pressure, in refrigerant system design, using Flash Type economizer or crosses cold mould economizer, It needs that economizer intermediate pressure is kept to should be greater than compressor economizer gas supplementing opening or air injection enthalpy-increasing by the control of electric expansion valve The pressure of mouth, enough pressure differences guarantee flowing velocity energy, and need to overcome the valve droop loss on gas piping and pipeline edge Journey drag losses.

Although " quasi- second level " compression process of above-mentioned economizer tonifying Qi or air injection enthalpy-increasing has the above advantage, it freezes The intermediate pressure of system depends entirely on the compressed content product ratio design of the economizer gas supplementing opening or air injection enthalpy-increasing mouth of compressor, Under given compressor Design of Mechanical Structure and the operating condition of refrigeration system, the intermediate pressure of refrigeration system be it is fixed, be It cannot adjust on demand.

In Air-Cooled Heat Pump Unit, the pressure at expulsion (high pressure) and pressure of inspiration(Pi) of the system operation of cooling in summer and winter heating The operating condition range of power (low pressure) is very broad, and low pressure can may be up to 65 DEG C of exhausts down to -20 DEG C of air-breathing saturation temperatures, high pressure Saturation temperature, it is desirable that the compressed content of compressor intermediate fill gas mouth or air injection enthalpy-increasing mouth product is adjustable and at any time changes than designing Become, compressed content product has been difficult to meet Air-Cooled Heat Pump Unit cooling in summer and winter than the compressor that cannot be adjusted on demand The demand of season heating.

Summary of the invention

Aiming at the problems existing in the prior art, the utility model provides a kind of low pressure heat pump air-breathing supercharging device, Solve in the prior art the compressed content of compressor intermediate fill gas mouth or air injection enthalpy-increasing mouth product than cannot adjust at any time and with When the problem of changing.

The technical scheme adopted by the utility model is a kind of low pressure heat pump air-breathing supercharging device, including main compressor, Oil eliminator, four-way reversing valve, air-cooled condenser, liquid filter, shell and tube evaporator, Flash Type economizer, oil pump, oil are cold But device and intermediate compressor, the main compressor exhaust outlet pass through the first one-way exhaust valve and first exhaust ball valve and oil eliminator Air entry is connected, and the oil eliminator exhaust outlet is connected with four-way reversing valve air-breathing nozzle, the four-way reversing valve exhaust Nozzle is connected by the first one-way sucting valve with main compressor air entry, the first connection nozzle and wind of the four-way reversing valve Second connection nozzle of cool condenser connection, the four-way reversing valve is connected with shell and tube evaporator, the air-cooled condenser It is connected by shunt head, the first refrigeration one-way exhaust valve with liquid filter, the liquid filter is swollen by the first electronics Swollen valve is connected with Flash Type economizer, and the Flash Type economizer first outlet passes through the second electric expansion valve or bypass electromagnetism Valve, the second refrigeration check valve are connected with shell and tube evaporator, the Flash Type economizer second outlet and intermediate compressor Air entry is connected, and the intermediate compressor exhaust outlet is connected by intergrade air passage one-way valve with main compressor exhaust outlet, The shell and tube evaporator is connected by the first heating check valve with liquid filter, and second electric expansion valve passes through the Two heating check valves are connected with shunt head, and the oil pump is connected by oil pump bypass circulation check valve with oil cooler oil inlet Logical, the oil cooler oil outlet passes through compressor oil-supplying filter and compressor oil-supplying solenoid valve and main compressor oil inlet phase Connection.

Intermediate compressor in the application is connected in parallel between main compressor exhaust outlet and Flash Type economizer, passes through intergrade Air passage one-way valve controls intermediate compressor, and the pressure at expulsion for avoiding main compressor moves back to the row of intergrade compressor On tracheae, it may be implemented when main compressor is run, energy can be opened at any time as desired, close and be carried out to intergrade compressor Amount is adjusted, and is not influenced completely by main compressor.

Intergrade air passage one-way valve is provided between intermediate compressor exhaust outlet and main compressor exhaust outlet, when main compression When the pressure of machine is higher than refrigeration system intermediate pressure, the setting of intergrade air passage one-way valve, which prevents in main compressor, calms the anger Body, which flows backwards to flow backwards with the lubricating oil in main compressor, to be entered in intermediate compressor.

Power is provided to main compressor by oil pump and oil cooler.

Preferably, the four-way reversing valve includes the first four-way reversing valve and the second four-way reversing valve, first four-way Reversal valve and the second four-way reversing valve are arranged in parallel.

Preferably, the air-cooled condenser includes the first air-cooled condenser and the second air-cooled condenser, the shunt head packet The first shunt head and the second shunt head are included, first shunt head is arranged on the pipeline of the first air-cooled condenser, and described second Shunt head is arranged on the pipeline of the second air-cooled condenser.

Preferably, the low pressure heat pump air-breathing supercharging device further included cold mould economizer, described to cross cold mould economizer It is arranged between Flash Type economizer and shell-and-tube evaporator, the Flash Type economizer first outlet and crosses cold mould economizer the One entrance is connected, and the cold mould economizer first outlet of crossing is connected by tonifying Qi circuit check valve with main compressor gas supplementing opening Logical, the cold mould economizer second outlet of crossing passes through third electric expansion valve, the second electric expansion valve or bypass solenoid valve, second Refrigeration check valve is connected with shell and tube evaporator, and the cold mould economizer second outlet of crossing can also be by the cold refrigerant of oil Fluid path check valve is connected with oil cooler.

Preferably, the low pressure heat pump air-breathing supercharging device further includes turbine centrifugal supercharging device, the turbine centrifugal Supercharging device includes turbine turbine lateral lobe wheel and centrifugation is pressurized lateral lobe wheel, the turbine turbine lateral lobe wheel and centrifugation pressurization lateral lobe wheel It is attached by wheel rotation axis, is provided with turbine turbine air inlet and turbine turbine exhaust on the turbine turbine lateral lobe wheel Mouthful, centrifugation super charge mouth and centrifugation pressurized exhaust gas mouth are provided on the centrifugation pressurization lateral lobe wheel.

Preferably, the low pressure heat pump air-breathing supercharging device further includes mixed flow centrifugation supercharging device, the mixed flow centrifugation Supercharging device includes mixed flow radial outward admission mouth and mixed flow centrifugation exhaust outlet, the four-way reversing valve exhaust pipe mouth and mixed flow be centrifuged into Port is connected, and the mixed flow centrifugation exhaust outlet is connected with main compressor air entry.

Preferably, the second outlet of Flash Type economizer is arranged in the turbine centrifugal supercharging device and intermediate compressor is inhaled Between gas tube orifice, the second outlet of the Flash Type economizer is connected with turbine turbine air inlet, the turbine turbine exhaust Mouth is connected with intermediate compressor air inlet, and the four-way reversing valve exhaust pipe mouth is connected with centrifugation super charge mouth, described Centrifugation pressurized exhaust gas mouth is connected with main compressor air entry.

Preferably, turbine centrifugal supercharging device setting four-way reversing valve exhaust pipe mouth and main compressor air entry it Between, the intermediate compressor exhaust outlet is connected with turbine turbine air inlet, and the turbine turbine exhaust mouth and main compressor are arranged Port is connected, the four-way reversing valve exhaust pipe mouth with centrifugation super charge mouth be connected, the centrifugation pressurized exhaust gas mouth and Main compressor air entry is connected.

Preferably, the Flash Type economizer third outlet is controlled solenoid valve and weep circuit check valve and is divided by drain Stream head is connected, and the Flash Type economizer first outlet can be connected by the cold refrigerant fluid path check valve of oil with oil cooler Logical, the oil cooler exhaust outlet is connected by the first one-way sucting valve with main compressor air entry.

The beneficial effect that the utility model reaches is: the utility model provides a kind of low pressure heat pump air-breathing pressurization dress It sets, by the way that intergrade compressor is arranged, increases turbine centrifugal supercharging device or mixed flow centrifugation supercharging device, realize extremely low The pressure of inspiration(Pi) pressurization of main compressor, realizes the compressed content of compressor intermediate fill gas mouth or air injection enthalpy-increasing mouth under environment temperature The problem of product is than that can adjust at any time and change at any time.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawing,

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the structural schematic diagram increased after cold mould economizer in the utility model；

Fig. 3 is increase turbine centrifugal supercharging device structural schematic diagram in the utility model embodiment 3；

Fig. 4 is increase turbine centrifugal supercharging device structural schematic diagram in the utility model embodiment 4；

Fig. 5 is to increase mixed flow centrifugation supercharging device structural schematic diagram in the utility model embodiment 5；

Fig. 6 is to increase mixed flow centrifugation supercharging device structural schematic diagram in the utility model embodiment 6；

Fig. 7 is the structural schematic diagram of the utility model embodiment 7；

Fig. 8 is the structural schematic diagram of turbine centrifugal supercharging device in the utility model；

Fig. 9 is the structural schematic diagram of mixed flow centrifugation supercharging device in the utility model；

Wherein, 1, main compressor, 11, main compressor exhaust outlet, the 12, first one-way exhaust valve, 13, first exhaust ball valve, 14, main compressor air entry, 15, main compressor oil inlet, 16, main compressor gas supplementing opening, the 17, first one-way sucting valve, 2, oil Separator, 21, oil eliminator air entry, 22, oil eliminator exhaust outlet, 3, four-way reversing valve, the 31, first four-way reversing valve, 32, Second four-way reversing valve, 33, four-way reversing valve air-breathing nozzle, 34, four-way reversing valve exhaust pipe mouth, the 35, first connection nozzle, 36, the second connection nozzle, 4, air-cooled condenser, the 41, first air-cooled condenser, the 42, second air-cooled condenser, 43, shunt head, 431, the first shunt head, the 432, second shunt head, the 44, first refrigeration one-way exhaust valve, 5, liquid filter, the 51, first electronics Expansion valve, 6, shell and tube evaporator, the 61, first heating check valve, 7, Flash Type economizer, 71, Flash Type economizer first goes out Mouthful, 72, Flash Type economizer second outlet, 73, the outlet of Flash Type economizer third, the 74, second electric expansion valve, 75, bypass Solenoid valve, 76, second refrigeration check valve, 77, second heating check valve, 78, drain control solenoid valve, 79, weep circuit it is unidirectional Valve, 8, intermediate compressor, 81, intermediate compressor air entry, 82, intermediate compressor exhaust outlet, 83, intergrade air passage one-way valve, 9, oil pump, 91, oil pump bypass circulation check valve, 10, oil cooler, 101, oil cooler oil inlet, 102, oil cooler it is fuel-displaced Mouthful, 103, compressor oil-supplying filter, 104, compressor oil-supplying solenoid valve, 105, oil cooler exhaust outlet, 106, the cold refrigeration of oil Agent fluid path check valve, 20, cross cold mould economizer, 201, cross cold mould economizer first entrance, 202, cross cold mould economizer first go out Mouthful, 203, tonifying Qi circuit check valve, 204, mistake cold mould economizer second outlet, 205, third electric expansion valve, 30, turbine centrifugal Supercharging device, 301, turbine turbine lateral lobe wheel, 302, turbine turbine air inlet, 303, turbine turbine exhaust mouth, 304, impeller turn Moving axis, 305, centrifugation pressurization lateral lobe wheel, 306, centrifugation super charge mouth, 307, centrifugation pressurized exhaust gas mouth, 40, mixed flow centrifugation pressurization Device, 401, mixed flow radial outward admission mouth, 402, mixed flow centrifugation exhaust outlet.

Specific embodiment

Specific embodiments of the utility model will be further explained with reference to the accompanying drawing.

Embodiment 1: as shown in Figure 1, a kind of low pressure heat pump air-breathing supercharging device, including main compressor 1, oil eliminator 2, Four-way reversing valve 3, air-cooled condenser 4, liquid filter 5, shell and tube evaporator 6, Flash Type economizer 7, intermediate compressor 8, Oil pump 9 and oil cooler 10, main compressor exhaust outlet 11 pass through the first one-way exhaust valve 12 and first exhaust ball valve 13 and oil It is connected from device air entry 21, the oil eliminator exhaust outlet 22 is connected with four-way reversing valve air-breathing nozzle 33, the four-way Reversal valve exhaust pipe mouth 34 is connected by the first one-way sucting valve 17 with main compressor air entry 14, the four-way reversing valve 3 First connection nozzle 35 be connected to air-cooled condenser 4, the four-way reversing valve 3 second connection nozzle 36 and shell-tube type evaporation Device 6 is connected, and the air-cooled condenser 4 is connected by the refrigeration one-way exhaust valve 44 of shunt head 43, first with liquid filter 5 Logical, the liquid filter 5 is connected by the first electric expansion valve 51 with Flash Type economizer 7, the Flash Type economizer First outlet 71 passes through the second electric expansion valve 74 or the refrigeration check valve 76 of bypass solenoid valve 75, second and shell and tube evaporator 6 Be connected, the Flash Type economizer second outlet 72 is connected with intermediate compressor air entry 81, the intermediate compressor Exhaust outlet 82 is connected by intergrade air passage one-way valve 83 with main compressor exhaust outlet 11, and the shell and tube evaporator 6 passes through First heating check valve 61 is connected with liquid filter 5, and second electric expansion valve 74 passes through the second heating check valve 77 It is connected with shunt head 43, the oil pump 9 is connected by oil pump bypass circulation check valve 91 with oil cooler oil inlet 101, The oil cooler oil outlet 102 by compressor oil-supplying filter 103 and compressor oil-supplying solenoid valve 104 and main compressor into Hydraulic fluid port 15 is connected.

The four-way reversing valve 3 includes the first four-way reversing valve 31 and the second four-way reversing valve 32, and first four-way changes 31 are arranged in parallel to valve and the second four-way reversing valve 32；The air-cooled condenser 4 includes the first air-cooled condenser 41 and the second wind Cool condenser 42, the shunt head 43 include the first shunt head 431 and the second shunt head 432, and first shunt head 431 is arranged On the pipeline of the first air-cooled condenser 41, second shunt head 432 is arranged on the pipeline of the second air-cooled condenser 42.

The Flash Type economizer third outlet 73 is controlled solenoid valve 78 and weep circuit check valve 79 and is divided by drain Stream head 43 is connected, and the Flash Type economizer first outlet 71 can be cooling by the cold refrigerant fluid path check valve 106 of oil and oil Device 10 is connected, and the oil cooler exhaust outlet 105 is connected by the first one-way sucting valve 17 with main compressor air entry 14.

In main compressor 1, the refrigerant gas of low-temp low-pressure is compressed to the refrigerant gas of high temperature and pressure, main compression The exhaust of machine 1 flows through first exhaust check valve 12 and first exhaust ball valve 13, and exhaust enters in oil eliminator 2, lubricating oil and Refrigerant gas is separated in oil eliminator 2, and most lubricating oil are retained in 2 bottom of oil eliminator, has minute quantity The refrigerant gas of lubricating oil be discharged and flowed through in four-way reversing valve 3 in parallel through oil eliminator 2, four-way reversing valve 3 is in wind The switching that suction and discharge are realized in cold and hot pumping system, to realize the conversion of refrigeration mode and heating mode.

When refrigeration cycle, the first connection nozzle 35 that the exhaust of four-way reversing valve 3 flows through four-way reversing valve 3 enters air-cooled In condenser 4, the heat of refrigerant is taken away in 4 high-speed fan rough air of air-cooled condenser and is dispersed into environment, it is air-cooled cold The refrigerant gas that condenser 4 manages the high temperature and pressure of interior flowing radiates and is condensed into the refrigerant liquid of high temperature and pressure supercooling, liquid It flows through shunt head 43 and the first refrigeration one-way exhaust valve 44 enters in liquid filter 5, filter out the water in impurity and refrigeration system Part.The refrigerant liquid of high temperature and pressure is the refrigerant gas and liquid of intermediate pressure through 51 reducing pressure by regulating flow of the first electric expansion valve Two-phase mixture, and be drained into Flash Type economizer 7, two phase refrigerant liquids and gases are real in Flash Type economizer 7 It now separates, the refrigerant liquid of saturation is flowed into the second electric expansion valve 74 or bypass electromagnetism from the bottom of Flash Type economizer 7 Valve 75 is imported again into the second refrigeration check valve 76, passes through the further reducing pressure by regulating flow of the second expansion valve 74, intermediate pressure refrigeration Agent liquid becomes the two phase refrigerant of low-temp low-pressure, enters in shell and tube evaporator 6, the chilled water in shell and tube exchanger 6 Water temperature reduces after absorbing the heat of refrigerant, and the freezing leaving water temperature that refrigeration system provides setting is supplied for cooling capacity, in package The gasification needs that 6 inner refrigerant liquid of formula heat exchanger becomes refrigerant gas absorb a large amount of latent heat from chilled water system Heat, this part caloric receptivity is exactly refrigerating capacity, and the refrigerant gas after gasification is inhaled through the second connection nozzle 36 of four-way reversing valve Enter, four-way reversing valve exhaust pipe mouth 34 is sucked after being discharged by main compressor air entry 14.

When heating circulation, the high-temperature high-pressure refrigerant gas that main compressor 1 is discharged flows through the second connection of four-way reversing valve 3 Nozzle 36 flows into shell and tube exchanger 6, and by the heat transfer of shell-and-tube heat exchanger 6, the refrigerant gas of high temperature and pressure is condensed into The refrigerant liquid of high temperature and pressure simultaneously heats in check valve 61 by first, and the liquefaction process needs of refrigerant give out a large amount of Latent heat, this heat, that is, heating capacity, after heating water absorbs this heating capacity, temperature is increased to provide high-temperature-hot-water demand；From The saturation refrigerant liquid of the intermediate pressure of 7 bottom of Flash Type economizer outflow flows through the second electric expansion valve 74 and bypass electromagnetism 75 reducing pressure by regulating flow of valve is the two phase refrigerant of low-temp low-pressure, air-cooled condenser 4 is returned to through the second hot check valve 77 of system, air-cooled The heat in surrounding air is absorbed in condenser 4, realizes the gasification of refrigerant, finally returns to main compressor 1 through suction line Air entry.

Intermediate compressor 8 in the application is connected in parallel between main compressor exhaust outlet 11 and Flash Type economizer 7, in Intercaste air passage one-way valve 83 controls intermediate compressor 8, and the pressure at expulsion for avoiding main compressor 1 moves back to intergrade pressure On contracting machine exhaust outlet 82, realize when main compressor 1 is run, intergrade compressor 8 can be opened at any time as desired, be closed With carry out energy adjustment, and do not influenced completely by main compressor 1.

Power is provided to main compressor 1 by oil pump 9 and oil cooler 10.

Embodiment 2: as shown in Fig. 2, cold mould economizer 20 was set on the basis of embodiment 1, it is described to cross cold mould economy Device 20 is arranged between Flash Type economizer 7 and shell-and-tube evaporator 6, the Flash Type economizer first outlet 71 and cold mould excessively Economizer first entrance 201 is connected, and the cold mould economizer first outlet 202 of crossing passes through tonifying Qi circuit check valve 203 and master Compressor gas supplementing opening 16 is connected, and the cold mould economizer second outlet 204 of crossing passes through the 205, second electricity of third electric expansion valve Sub- expansion valve 74 or bypass solenoid valve 75, second freeze being connected of check valve 76 and shell and tube evaporator 6, and the cold mould of crossing passes through Ji device second outlet 204 can also be connected by the cold refrigerant fluid path check valve 106 of oil with oil cooler 10.

By crossing the setting of cold mould economizer 20,205 reducing pressure by regulating flow of third electric expansion valve crosses cold mould warp to than not set Help device 7 when there is lower intermediate pressure, gas stream by cold mould economizer first outlet 71 and tonifying Qi circuit check valve 203 into Become owner of compressor air suction mouth 14.

Embodiment 3: as shown in figure 3, on the basis of embodiment 1 be arranged turbine centrifugal supercharging device 30, the turbine from Heart supercharging device 30 includes turbine turbine lateral lobe wheel 301 and centrifugation pressurization lateral lobe wheel 305,301 He of turbine turbine lateral lobe wheel Centrifugation pressurization lateral lobe wheel 305 is attached by wheel rotation axis 304, is provided with turbine on the turbine turbine lateral lobe wheel 301 Turbine air inlet 302 and turbine turbine exhaust mouth 303, the centrifugation, which is pressurized on lateral lobe wheel 305, is provided with centrifugation super charge mouth 306 and centrifugation pressurized exhaust gas mouth 307；The setting of turbine centrifugal supercharging device 30 is in Flash Type economizer second outlet 72 in Between between compressor air suction mouth 81, the Flash Type economizer second outlet 72 is connected with turbine turbine air inlet 302, described Turbine turbine exhaust mouth 303 is connected with intermediate compressor air entry 81, and the four-way reversing valve exhaust pipe mouth 34 increases with centrifugation It is pressed into port 306 to be connected, the centrifugation pressurized exhaust gas mouth 307 is connected with main compressor air entry 14.

In the present solution, turbine turbine lateral lobe wheel 301 can and be converted into the high-pressure that intermediate compressor 8 is vented is consumed The rotational kinetic energy of turbine turbine lateral lobe wheel 301, turbine turbine lateral lobe wheel 301 are exported to the torsion of the enough power of wheel rotation axis 304 Square, this torque will push centrifugation pressurization lateral lobe wheel 305 and rotate, and centrifugation pressurization lateral lobe wheel 305 will consume the torsion of wheel rotation axis 304 The mechanical energy of wheel rotation axis 304 is converted into the pressure energy of 1 air-breathing of main compressor by square mechanical output, is ultimately inhaled main compression Machine air entry 14, the refrigerant gas pressure in 14 pipeline of main compressor air entry obtain one compared to the gas pressure of suction line The raising of tentering degree.

For example, operating condition is as follows for the Air-Cooled Heat Pump Unit of R134a: air-breathing saturation temperature is -15 DEG C, and exhaust is full It is 55 DEG C with temperature, the operating condition that 50 DEG C of liquidus temperature, the corresponding saturation temperature of intermediate pressure Pm of optimization is 15.5 DEG C, this When, the air-breathing density of main compressor 1 is 8.3kg/m3, and the air-breathing density of the air entry of intergrade compressor 8 is 24kg/m3, this When intergrade compressor 8 air-breathing mass flow be main compressor 1 air-breathing mass flow 37%, it is contemplated that main compressor 1 Air-breathing density is only the 1/3 of the air-breathing density of intergrade compressor 8, then the theoretical displacement of intergrade compressor 8 only needs to set It is calculated as 12.5% or so of main compressor 1.From intergrade exhaust outlet of compressor 82 by flowing through turbine turbine air inlet 302 and whirlpool Turbine exhaust mouth 303 is taken turns, the air-breathing saturation temperature of pressure reduction 100kPa, intermediate compressor 8 are reduced to 8.5 DEG C, and air-breathing is close Degree is reduced to 19.2kg/m3, if it is assumed that turbo-side pneumatic efficiency is suitable with pressurization side pneumatic efficiency, then centrifugation pressurization at this time The pressure of lateral lobe wheel 305 can promote 30kPa, then the air-breathing saturation temperature of main compressor 1 can be improved from -15 DEG C To -10.8 DEG C, the air-breathing density of main compressor 1 improves 11.8%, and heating capacity is improved can mention with system efficiency of thermal cycle It is high by about 10%.The theoretical displacement of corresponding intergrade compressor 8 needs to improve about 25%, can design using biggish intermediate compression Machine 8 (theoretical displacement of intergrade compressor 8 be designed as main compressor 1 16% or so), when the circulation using air-breathing supercharging device When, the pressure of inspiration(Pi) for promoting main compressor 1 is reached using 8 discharge capacity of intergrade compressor of increase, further promotes air-cooled heat The low circumstance temperature heating operation range of pumping system, according in upper example, the environment temperature of winter heating can reduce again 3-4 DEG C to run wind Cold and hot pump assembly.

Since the Theoretical Design discharge capacity of intergrade compressor 102 is only 16% or so, and turbine centrifugal supercharger arrangement 102 Only realize about 30-100kPa pressure of inspiration(Pi) pressurization, therefore the size of the air entry of booster about with the size phase of suction line Together, size of this device in refrigerating plant is very compact.Air-breathing supercharging device can further realize Air-Cooled Heat Pump Unit It operates under lower environment temperature.

Embodiment 4: as shown in figure 4, the turbine centrifugal supercharging device 30 in embodiment 3 is changed position, by turbine centrifugal Supercharging device 30 is arranged between four-way reversing valve exhaust pipe mouth 34 and main compressor air entry 14, the intermediate compressor exhaust Mouth 82 is connected with turbine turbine air inlet 302, and the turbine turbine exhaust mouth 303 is connected with main compressor exhaust outlet 11, The four-way reversing valve exhaust pipe mouth 34 is connected with centrifugation super charge mouth 306, the centrifugation pressurized exhaust gas mouth 307 and main pressure Contracting machine air entry 14 is connected.

In the present solution, turbine turbine lateral lobe wheel 301 can and be converted the high-pressure that intergrade compressor 8 is vented is consumed At the rotational kinetic energy of turbine turbine lateral lobe wheel 301, the admission pressure of turbine turbine lateral lobe wheel 301 comes from intergrade compressor air suction The admission pressure of mouth 81 or turbine turbine lateral lobe wheel 301 comes from intergrade exhaust outlet of compressor 82, caused by pressure at expulsion is high Gas density is high, temperature is high, and pressure energy reduces smaller to the influence on system operation of intergrade compressor 8.

Embodiment 5: as shown in figure 5, on the basis of embodiment 1 setting mixed flow be centrifuged supercharging device 40, the mixed flow from Heart supercharging device 40 includes that mixed flow radial outward admission mouth 401 and mixed flow are centrifuged exhaust outlet 402, the four-way reversing valve exhaust pipe mouth 34 It is connected with mixed flow radial outward admission mouth 401, the mixed flow centrifugation exhaust outlet 402 is connected with main compressor air entry 14.

In the present solution, mixed flow centrifugation supercharging device 40 passes through electric drive, without using the exhaust pressure of intergrade compressor 8 Power energy or pressure of inspiration(Pi) can be converted to the Machine Design of torque machinery energy, and mixed flow centrifugation supercharging device 40 is only capable of providing lesser Pressure of inspiration(Pi) pressurization is promoted.

For example, realizing that the pressure of inspiration(Pi) of 30kPa-100kpa is promoted in intermediate compressor 8, so that it may improve about 3 DEG C -10 DEG C On the other hand the raising of air-breathing saturation temperature also illustrates air-cooled heat pump machine then the operational efficiency of main compressor 1 increases substantially Group may operate under winter refrigeration operating condition, and environment temperature allows low 3 DEG C -10 DEG C again, can do ultralow environment temperature heat Pump operation.Different from realizing two stages of compression using common centrifugal compressor low-pressure stage, due to the ruler of centrifugal compressor Very little bigger, pressure head is higher, and our design does not need so high pressure head, it is only necessary to pressure of inspiration(Pi) pressurization by a small margin.Therefore Air-breathing pressurization by a small margin is realized using smaller szie, therefore can guarantee that big flow is small using mixed flow centrifugation supercharging device 40 Pressure head operation, at an angle, centrifugal compressor is that axial admission is radial to the discharge directions and radial direction of mixed flow turbo-compressor Exhaust, axial flow compressor are axial admission axial exhaust.The pressure head that centrifugal compressor provides is higher, up to (the exhaust of 45 DEG C of highest Saturation temperature-air-breathing saturation temperature), but flow is smaller.The pressure head very little that axial flow compressor provides, but can be achieved on big stream Amount.From the point of view of the application of the air-breathing pressurization 30kPa-100kPa of refrigeration system, the centrifugation booster compressor of mixed flow impeller is Selection well, the size of air inlet is identical with air-breathing caliber, and size is more compact, and mixed flow is centrifuged supercharging device 40 can be into One step realizes that Air-Cooled Heat Pump Unit operates under lower environment temperature.

Embodiment 6: as shown in fig. 6, on the basis of embodiment 2 be arranged mixed flow be centrifuged supercharging device 40, the mixed flow from Heart supercharging device 40 includes that mixed flow radial outward admission mouth 401 and mixed flow are centrifuged exhaust outlet 402, the four-way reversing valve exhaust pipe mouth 34 It is connected with mixed flow radial outward admission mouth 401, the mixed flow centrifugation exhaust outlet 402 is connected with main compressor air entry 14.

In the present solution, remain economizer tonifying Qi or the air injection enthalpy-increasing circuit of main compressor 1, while being centrifuged using mixed flow The pressure of inspiration(Pi) of the raising main compressor 1 of supercharging device 40.

Embodiment 7: as shown in fig. 7, remove intermediate compressor 8 on the basis of embodiment 5, the Flash Type economizer Two outlets 72 are connected by intergrade air passage one-way valve 83 with main compressor gas supplementing opening 16.

Pressure energy can be converted to torsion without using the pressure at expulsion energy or pressure of inspiration(Pi) of intergrade compressor 8 by this structure Square mechanical energy.This mixed flow is centrifuged supercharging device 40 using electric drive, only provides lesser pressure of inspiration(Pi) pressurization and is promoted, this electricity The mixed flow centrifugation air-breathing supercharging device 40 of driving can further realize Air-Cooled Heat Pump Unit and operate under lower environment temperature.

It is the preferred embodiment of the utility model above, does not impose any limitation on the present invention, All foundation the technical essence of the utility model any simple modification, equivalent change and modification made to the above embodiment, Belong in the range of utility model technical solution.

Claims (9)

1. a kind of low pressure heat pump air-breathing supercharging device, which is characterized in that including main compressor, oil eliminator, four-way reversing valve, Air-cooled condenser, liquid filter, shell and tube evaporator, Flash Type economizer, oil pump, oil cooler and intermediate compressor, institute It states main compressor exhaust outlet and is connected by the first one-way exhaust valve with first exhaust ball valve with oil eliminator air entry, the oil Separator exhaust outlet is connected with four-way reversing valve air-breathing nozzle, and the four-way reversing valve exhaust pipe mouth passes through the first one-way intake Valve is connected with main compressor air entry, and the first connection nozzle of the four-way reversing valve is connected to air-cooled condenser, and described four Second connection nozzle of logical reversal valve is connected with shell and tube evaporator, and the air-cooled condenser passes through shunt head, the first refrigeration One-way exhaust valve is connected with liquid filter, and the liquid filter passes through the first electric expansion valve and Flash Type economizer phase Connection, the Flash Type economizer first outlet by the second electric expansion valve or bypass solenoid valve, the second refrigeration check valve with Shell and tube evaporator is connected, and the Flash Type economizer second outlet is connected with intermediate compressor air entry, it is described in Between exhaust outlet of compressor be connected by intergrade air passage one-way valve with main compressor exhaust outlet, the shell and tube evaporator passes through First heating check valve is connected with liquid filter, and second electric expansion valve passes through the second heating check valve and shunt head It is connected, the oil pump is connected by oil pump bypass circulation check valve with oil cooler oil inlet, and the oil cooler is fuel-displaced Mouth is connected by compressor oil-supplying filter and compressor oil-supplying solenoid valve with main compressor oil inlet.

2. a kind of low pressure heat pump air-breathing supercharging device according to claim 1, which is characterized in that the four-way reversing valve Including the first four-way reversing valve and the second four-way reversing valve, first four-way reversing valve and the second four-way reversing valve parallel connection are set It sets.

3. a kind of low pressure heat pump air-breathing supercharging device according to claim 2, which is characterized in that the air-cooled condenser Including the first air-cooled condenser and the second air-cooled condenser, the shunt head includes the first shunt head and the second shunt head, described First shunt head is arranged on the pipeline of the first air-cooled condenser, and the pipe of the second air-cooled condenser is arranged in second shunt head On the road.

4. a kind of low pressure heat pump air-breathing supercharging device according to claim 3, which is characterized in that the low pressure heat pump is used Air-breathing supercharging device further included cold mould economizer, described to cross the setting of cold mould economizer in Flash Type economizer and shell-and-tube evaporation Between device, the Flash Type economizer first outlet is connected with cold mould economizer first entrance is crossed, described to cross cold mould economizer First outlet is connected by tonifying Qi circuit check valve with main compressor gas supplementing opening, and the cold mould economizer second outlet of crossing passes through Third electric expansion valve, the second electric expansion valve or bypass solenoid valve, the second refrigeration check valve are connected with shell and tube evaporator Logical, the cold mould economizer second outlet of crossing can also be connected by the cold refrigerant fluid path check valve of oil with oil cooler.

5. a kind of low pressure heat pump air-breathing supercharging device according to claim 3, which is characterized in that the low pressure heat pump is used Air-breathing supercharging device further includes turbine centrifugal supercharging device, the turbine centrifugal supercharging device include turbine turbine lateral lobe wheel and from The heart is pressurized lateral lobe wheel, and the turbine turbine lateral lobe wheel and centrifugation pressurization lateral lobe wheel are attached by wheel rotation axis, the whirlpool It is provided with turbine turbine air inlet and turbine turbine exhaust mouth on wheel turbine lateral lobe wheel, is provided on the centrifugation pressurization lateral lobe wheel It is centrifuged super charge mouth and centrifugation pressurized exhaust gas mouth.

6. a kind of low pressure heat pump air-breathing supercharging device according to claim 3 or 4, which is characterized in that the low pressure heat Pump air-breathing supercharging device further includes mixed flow centrifugation supercharging device, and the mixed flow centrifugation supercharging device includes mixed flow radial outward admission mouth It is centrifuged exhaust outlet with mixed flow, the four-way reversing valve exhaust pipe mouth is connected with mixed flow radial outward admission mouth, the mixed flow centrifugation row Port is connected with main compressor air entry.

7. a kind of low pressure heat pump air-breathing supercharging device according to claim 5, which is characterized in that the turbine centrifugal increases Pressure device is arranged between the second outlet of Flash Type economizer and intermediate compressor air-breathing nozzle, the Flash Type economizer Two outlets are connected with turbine turbine air inlet, and the turbine turbine exhaust mouth is connected with intermediate compressor air inlet, described Four-way reversing valve exhaust pipe mouth is connected with centrifugation super charge mouth, the centrifugation pressurized exhaust gas mouth and main compressor air entry phase Connection.

8. a kind of low pressure heat pump air-breathing supercharging device according to claim 5, which is characterized in that the turbine centrifugal increases Pressure device is arranged between four-way reversing valve exhaust pipe mouth and main compressor air entry, the intermediate compressor exhaust outlet and turbine Turbine air inlet is connected, and the turbine turbine exhaust mouth is connected with main compressor exhaust outlet, the four-way reversing valve exhaust Nozzle is connected with centrifugation super charge mouth, and the centrifugation pressurized exhaust gas mouth is connected with main compressor air entry.

9. a kind of low pressure heat pump air-breathing supercharging device according to claim 5, which is characterized in that the Flash Type economy The outlet of device third is connected by drain control solenoid valve and weep circuit check valve with shunt head, the Flash Type economizer the One outlet can be connected by the cold refrigerant fluid path check valve of oil with oil cooler, and the oil cooler exhaust outlet is single by first It is connected to inlet valve with main compressor air-breathing nozzle.