CN101493269B - Low temperature heat pump air conditioning system - Google Patents

Low temperature heat pump air conditioning system Download PDF

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Publication number
CN101493269B
CN101493269B CN2009101110351A CN200910111035A CN101493269B CN 101493269 B CN101493269 B CN 101493269B CN 2009101110351 A CN2009101110351 A CN 2009101110351A CN 200910111035 A CN200910111035 A CN 200910111035A CN 101493269 B CN101493269 B CN 101493269B
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throttle
cold
outlet
inlet
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CN2009101110351A
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CN101493269A (en
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林贤华
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林贤华
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Abstract

The invention relates to a low temperature heat pump air conditioning system, consisting of a compressor, an electromagnetic four-way valve, an outdoor heat exchanger, a throttle mechanism, a super cooling intercooler, an indoor heat exchanger and a gas-liquid separator. In the invention, an air supply device for the super cooling intercooler is provided, when heating is carried out under the low temperature working condition, the super cooling intercooler is used for supplementing the compressor with medium pressured saturated refrigerant gas to increase the super cooling degree of the refrigerant in the main circulation and simultaneously increase inspiration capacity of the compressor so as to enhance the mass flux of the refrigerant in the main circulation, thus heating capacity is increased and compression ratio and gas discharge temperature are decreased. The low temperature heat pump air conditioning system has the advantages of simple structure, easy manufacturing, low manufacturing cost, high efficiency, energy-saving, stable and reliable operation, etc.

Description

Low temperature heat pump air conditioning system
One, technical field
The present invention relates to the air source heat pump air-conditioner field, refer more particularly to the heat pump type air conditioning system that has good heating effect under the outdoor worst cold case.
Two, background technology
At present, the normal air source heat pump air-conditioner of selling on the market, under outdoor worst cold case, the heating capacity decay is very serious, even can't normally start operation, at the northern China cold district, can only use at transition season.Therefore in the winter of cold, can't satisfy basic heat demand, in the area of cold, generally still adopt traditional central heating mode, and these heating the time need consume a large amount of mineral matters or oil plant, and both contaminated environment is also uneconomical, and energy-saving and emission-reduction are advocated in the whole world now.The low temperature heat pump air conditioning system that has will adopt the screw compressor of frequency conversion system or two air entries of steam jet enthalpy, exists like this to make system complex, and cost strengthens, so need exploitation a kind of simple in structure, low temperature heat pump air conditioning system easy to manufacture, cheap, energy-efficient.
Three, summary of the invention
The present invention is a kind of low temperature heat pump air conditioning system, and providing a kind of can normally start the low temperature heat pump air conditioning system that moves and have good heating effect under outdoor worst cold case.
The present invention constitutes like this: 1. low temperature heat pump air conditioning system, by compressor, solenoid operated four-way valve, the outdoor use heat exchanger, throttle mechanism, cross cold charge air cooler, indoor heat exchanger, gas-liquid separator is formed, it is characterized in that: the outlet of described compressor links to each other with solenoid operated four-way valve one inlet a by pipeline, solenoid operated four-way valve one outlet b links to each other with the outdoor use heat exchanger entrance, described outdoor use heat exchanger exit links to each other with filter inlet, filter outlet links to each other with two-way dual-purpose throttle mechanism inlet, two-way dual-purpose throttle mechanism outlet links to each other with the inlet of crossing cold charge air cooler inner coil pipe, the outlet one tunnel of the cold charge air cooler inner coil pipe of described mistake links to each other with another filter inlet, another filter outlet links to each other with the inlet of indoor heat exchanger, another inlet of the outlet of described indoor heat exchanger and solenoid operated four-way valve d links to each other, another outlet of solenoid operated four-way valve c links to each other with the vapour liquid separator inlet, the vapour liquid separator outlet links to each other with the inlet of compressor, another road of the cold charge air cooler inner coil pipe outlet of described mistake links to each other with excessively cold throttle mechanism inlet, cross the outlet of cold throttle mechanism and cross cold charge air cooler inlet and link to each other, cross cold charge air cooler outlet and enter the mouth with vapour liquid separator and link to each other.
2. described low temperature heat pump air conditioning system, it is characterized in that, described two-way dual-purpose throttle mechanism heats throttle mechanism by forward and the throttle mechanism that oppositely freezes composes in parallel, described forward heats throttle mechanism and heats restricting element by a forward check valve and and be composed in series, described reverse refrigeration throttle mechanism is composed in series by a refrigeration restricting element and a reverse check valve, and the cold throttle mechanism of described mistake is crossed cold restricting element by a magnetic valve and and is composed in series.
Low temperature heat pump air conditioning system of the present invention, be provided with cold charge air cooler making-up air device, freeze identical under nominal situation with common heat pump air conditioner, heating operation, when the worst cold case heating operation, utilized cold charge air cooler to replenish the saturated refrigerant gas of intermediate pressure to compressor, the degree of supercooling of cold-producing medium in the major cycle is increased, the inspiratory capacity of compressor is increased, help to increase refrigerant mass fluxes in the major cycle, thereby increase heating capacity, reduce the compression ratio and the delivery temperature of compressor, the present invention has simple in structure, easy to manufacture, cheap, energy-efficient, advantages such as stable and reliable operation.
Four, description of drawings
Fig. 1 is the low temperature heat pump air conditioning system schematic diagram.
Fig. 2 is split type low temperature heat pump air conditioning system schematic diagram.
Fig. 3 is a hot pump in low temp central air conditioner system schematic diagram.
1 compressor among the above-mentioned figure, 2 outdoor use heat exchangers, 3 indoor heat exchangers, 4 two-way dual-purpose throttle mechanisms, 5 cross cold throttle mechanism, 6 solenoid operated four-way valves, 7 vapour liquid separators, 8 cross cold charge air cooler, 9 check valves, 10 refrigeration restricting elements, 11 heat restricting element, 12 cross cold restricting element, 13 filters, 14 magnetic valves, 15 refrigeration throttle capillary tubes, 16 heat throttle capillary tube, 17 cross cold throttle capillary tube, 18 refrigeration throttle expansion valve or restricting orifices, and 19 heat throttle expansion valve or restricting orifice, 20 cross cold throttle expansion valve or restricting orifice, 21 water pumps
Five, the specific embodiment
1. 1 kinds of low temperature heat pump air conditioning systems as shown in Figure 1, by compressor 1, solenoid operated four-way valve 6, outdoor use heat exchanger 2, throttle mechanism 4.5, cross cold charge air cooler 8, indoor heat exchanger 3, gas-liquid separator 7 is formed, it is characterized in that: the outlet of described compressor 1 links to each other with solenoid operated four-way valve 6 one inlet a by pipeline, solenoid operated four-way valve 6 one outlet b link to each other with outdoor use heat exchanger 2 inlets, described outdoor use heat exchanger 2 outlets link to each other with filter 13 inlets, filter 13 outlets link to each other with two-way dual-purpose throttle mechanism 4 inlets, two-way dual-purpose throttle mechanism 4 outlets link to each other with the inlet of crossing cold charge air cooler 8 inner coil pipes, the outlet one tunnel of cold charge air cooler 8 inner coil pipes of described mistake links to each other with another filter 13 inlets, another filter 13 outlets link to each other with the inlet of indoor heat exchanger 3, the outlet of described indoor heat exchanger 3 links to each other with solenoid operated four-way valve 6 another inlet d, solenoid operated four-way valve 6 another outlet c link to each other with vapour liquid separator 7 inlets, vapour liquid separator 7 outlets link to each other with the inlet of compressor 1, another road of the cold charge air cooler 8 inner coil pipes outlet of described mistake links to each other with excessively cold throttle mechanism 5 inlets, cross 5 outlets of cold throttle mechanism and cross cold charge air cooler 8 inlets and link to each other, cross cold charge air cooler 8 outlets and enter the mouth with vapour liquid separator 7 and link to each other.
2. described low temperature heat pump air conditioning system, it is characterized in that, described two-way dual-purpose throttle mechanism 4 heats throttle mechanism by forward and the throttle mechanism that oppositely freezes composes in parallel, described forward heats throttle mechanism and heats restricting element 11 by a forward check valve 9 and and be composed in series, described reverse refrigeration throttle mechanism is composed in series by a refrigeration restricting element 10 and a reverse check valve 9, and the cold throttle mechanism 5 of described mistake is crossed cold restricting element 12 by a magnetic valve 14 and and is composed in series.
Summer is when freezing, close magnetic valve 14, compressor 1 sucks the refrigerant vapour of isolating low-temp low-pressure from vapour liquid separator 7, and cold-producing medium is compressed into high temperature and high pressure gas, enter in the outdoor use heat exchanger 2 through solenoid operated four-way valve 6, cold-producing medium is by the air heat release in the outdoor use heat exchanger 2.Condensating refrigerant becomes highly pressurised liquid, through filter 13, after oppositely the 10 throttling step-downs of check valve 9 refrigeration restricting elements are lowered the temperature in the two-way dual-purpose throttle mechanism 4, passed through coil pipe in the cold charge air cooler 8, another filter 13 enters indoor heat exchanger 3, cold-producing medium absorbs the heat of air or water in indoor heat exchanger 3, room temperature is reduced, flash to low pressure, low-temperature refrigerant steam, enter vapour liquid separator 7 through solenoid operated four-way valve 6, sucked compression by compressor 1 again then, finish a kind of refrigeration cycle like this.
Winter is when heating, when outdoor environment temperature is higher than zero degree, close magnetic valve 14, compressor 1 sucks the refrigerant vapour of isolating low-temp low-pressure from vapour liquid separator 7, cold-producing medium is compressed into high temperature and high pressure gas, enter in the indoor heat exchanger 3 through solenoid operated four-way valve 6, cold-producing medium is by air or water heat release in the indoor heat exchanger 3, room temperature is raise, condensating refrigerant becomes highly pressurised liquid, through another filter 13, cross coil pipe in the cold charge air cooler 8, after forward check valve 9 heats restricting element 11 throttling step-downs cooling in the two-way dual-purpose throttle mechanism 4, through filter 13 inlet chamber external application heat exchangers 2, the heat of cold-producing medium absorption chamber outer air in outdoor heat exchanger 2, flash to the low-pressure low-temperature refrigerant vapour, enter vapour liquid separator 7 through solenoid operated four-way valve 6, sucked compression by compressor 1 again then, finish one like this and heat circulation.
Winter is when heating, when outdoor environment temperature is less than or equal to zero degree, opens solenoid valve 14, compressor 1 sucks isolates refrigerant of low temperature steam from vapour liquid separator 7, cold-producing medium is compressed into high temperature and high pressure gas, enter in the indoor heat exchanger 3 through solenoid operated four-way valve 6, cold-producing medium is by air or water heat release in the indoor heat exchanger 3, room temperature is raise, condensating refrigerant becomes highly pressurised liquid, be divided into two-way through another filter 13 liquid refrigerants, one road cold-producing medium passed through the magnetic valve 14 in the cold throttle mechanism 5 and crossed cold restricting element 12 throttlings is the intermediate pressure refrigerant liquid-vapor mixture, entered outside the coil pipe of cold charge air cooler, absorption coil inner refrigerant heat of vaporization is the intermediate pressure saturated vapor, this saturated vapor and the vapor mixing of coming out from outdoor heat exchanger 2, enter vapour liquid separator 7, another road cold-producing medium directly entered the coil pipe in the cold charge air cooler 8, carrying out heat exchange with the outer cold-producing medium of coil pipe emits heat and is condensed into subcooled liquid, after subcooled liquid heats restricting element 11 throttling step-downs cooling through forward check valve 9 in the two-way dual-purpose throttle mechanism 4, through filter 13 inlet chamber external heat exchangers 2, the heat of cold-producing medium absorption chamber outer air in outdoor heat exchanger 2, flash to the low-pressure low-temperature refrigerant vapour, through solenoid operated four-way valve 6 and cross cold charge air cooler 8 be evaporated in the compacting refrigerant gas be mixed into vapour liquid separator 7, sucked compression by compressor 1 again then, finish one so again and heat circulation.
Low temperature heat pump air conditioning system, identically with the ordinary hot pump air conditioner system under nominal situation freeze, heating operation, heat circulation time at worst cold case, the refrigerant liquid that comes out from indoor heat exchanger divides two-way, one road refrigerant liquid is gasified, thereby another road refrigerant liquid is cooled, improves whole major cycle cold-producing medium degree of supercooling.Utilized cold charge air cooler to replenish the saturated refrigerant gas of intermediate pressure to compressor, the compressor air suction amount is increased, help to increase refrigerant flow in the major cycle, thereby increase heating capacity, suck more refrigerant gas cooling compressors and make compressor exhaust temperature lower, the compacting refrigerant gas makes compressor compresses lower in the suction.
The present invention is simple in structure, and is easy to manufacture, cheap, energy-efficient, moves more reliable and more stable.
In order better to make full use of principle among Fig. 1: 1) we can be on the basis of Fig. 1, refrigeration restricting element 10 in the two-way dual-purpose throttle mechanism 4 is changed into refrigeration throttle capillary tube 15, heating restricting element 11 changes into and heats throttle capillary tube 16, changed cross cold restricting element 12 in the cold throttle mechanism 5 of mistake as cold throttle capillary tube 17 into, thereby formed the split type low temperature heat pump air conditioning system of Fig. 2; 2) we can be on the basis of Fig. 1, refrigeration restricting element 10 in the two-way dual-purpose throttle mechanism 4 is changed into refrigeration throttle expansion valve or restricting orifice 18, heating restricting element 11 changes into and heats throttle expansion valve or restricting orifice 19, changed cross cold restricting element 12 in the cold throttle mechanism 5 of mistake as cold throttle expansion valve or restricting orifice 20 into, indoor heat exchanger 3 is changed into indoor water cooling heat exchanger, insert water pump 21 at indoor water cooling heat exchanger water inlet, thereby formed Fig. 3 hot pump in low temp central air conditioner system.Two-way dual-purpose throttle mechanism 4 and the cold throttle mechanism 5 of mistake can replace with electric expansion valve.

Claims (2)

1. low temperature heat pump air conditioning system, by compressor, solenoid operated four-way valve, the outdoor use heat exchanger, throttle mechanism, cross cold charge air cooler, indoor heat exchanger, gas-liquid separator is formed, it is characterized in that: the outlet of described compressor links to each other with solenoid operated four-way valve one inlet a by pipeline, solenoid operated four-way valve one outlet b links to each other with the outdoor use heat exchanger entrance, described outdoor use heat exchanger exit links to each other with filter inlet, filter outlet links to each other with two-way dual-purpose throttle mechanism inlet, two-way dual-purpose throttle mechanism outlet links to each other with the inlet of crossing cold charge air cooler inner coil pipe, the outlet one tunnel of the cold charge air cooler inner coil pipe of described mistake links to each other with another filter inlet, another filter outlet links to each other with the inlet of indoor heat exchanger, another inlet of the outlet of described indoor heat exchanger and solenoid operated four-way valve d links to each other, another outlet of solenoid operated four-way valve c links to each other with the gas-liquid separator inlet, the gas-liquid separator outlet links to each other with the inlet of compressor, another road of the cold charge air cooler inner coil pipe outlet of described mistake links to each other with excessively cold throttle mechanism inlet, cross the outlet of cold throttle mechanism and cross cold charge air cooler inlet and link to each other, cross cold charge air cooler outlet and enter the mouth with gas-liquid separator and link to each other; Described compressor has only an air entry.
2. low temperature heat pump air conditioning system according to claim 1, it is characterized in that, described two-way dual-purpose throttle mechanism heats throttle mechanism by forward and the throttle mechanism that oppositely freezes composes in parallel, described forward heats throttle mechanism and heats restricting element by a forward check valve and and be composed in series, described reverse refrigeration throttle mechanism is composed in series by a refrigeration restricting element and a reverse check valve, and the cold throttle mechanism of described mistake is crossed cold restricting element by a magnetic valve and and is composed in series.
CN2009101110351A 2009-02-16 2009-02-16 Low temperature heat pump air conditioning system Expired - Fee Related CN101493269B (en)

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Application Number Priority Date Filing Date Title
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CN101493269B true CN101493269B (en) 2011-02-02

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101650075A (en) * 2009-09-07 2010-02-17 浙江正理生能科技有限公司 Air source low-temperature heat pump water heater
CN101793439B (en) * 2010-02-23 2013-01-16 林贤华 Multi-element heat pump air-conditioning system with low temperature and heat recovery
CN101799224B (en) * 2010-02-25 2011-08-24 林贤华 Low-temperature cooling, heating and water heating tri-purpose air-conditioning system
CN103129348B (en) * 2011-11-23 2017-07-11 杭州三花研究院有限公司 A kind of electric vehicle heat pump system
CN102494376B (en) * 2011-11-28 2013-12-04 林贤华 Turbocharging multiplex heat-pump and hot-water three-purpose air-conditioning system
CN102425825A (en) * 2011-11-28 2012-04-25 林贤华 Two-pipe ultra-high ultra-low temperature heat pump hot water triple-purpose central air conditioning system
CN105698320A (en) * 2016-04-20 2016-06-22 广东美的制冷设备有限公司 Air-conditioning system
CN105698447A (en) * 2016-04-20 2016-06-22 广东美的制冷设备有限公司 Air-conditioning system

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