CN101788206B - Outdoor double heat exchanger defrosting low-temperature heating system - Google Patents

Outdoor double heat exchanger defrosting low-temperature heating system Download PDF

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Publication number
CN101788206B
CN101788206B CN201010113352XA CN201010113352A CN101788206B CN 101788206 B CN101788206 B CN 101788206B CN 201010113352X A CN201010113352X A CN 201010113352XA CN 201010113352 A CN201010113352 A CN 201010113352A CN 101788206 B CN101788206 B CN 101788206B
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China
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valve
heat exchanger
way change
links
outdoor heat
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CN201010113352XA
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Chinese (zh)
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CN101788206A (en
Inventor
曾华文
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曾华文
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Priority to CN200910054380.6 priority Critical
Priority to CN200910054380 priority
Application filed by 曾华文 filed Critical 曾华文
Priority to CN201010113352XA priority patent/CN101788206B/en
Publication of CN101788206A publication Critical patent/CN101788206A/en
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Publication of CN101788206B publication Critical patent/CN101788206B/en

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Abstract

The invention relates to an outdoor double heat exchanger defrosting low-temperature heating system, which comprises a compressor (1), four-way reversing valves, an outdoor heat exchanger, a throttling device and an indoor heat exchanger (11). The outdoor heat exchanger is divided into two parts, namely a first outdoor heat exchanger (6) and a second outdoor heat exchanger (7) respectively. One end of the first outdoor heat exchanger (6) and one end of the second outdoor heat exchanger (7) are connected together through the throttling device (9) and an electromagnetic valve (8); and the other ends of the first outdoor heat exchanger (6) and the second outdoor heat exchanger (7) are respectively connected with an air pipe E or C at any one end of two four-way reversing valves; and an inlet/outlet pipe of the throttling device (9) is connected with an inlet/outlet pipe of the electromagnetic valve (8). The outdoor heat exchanger is divided into two parts; the two outdoor heat exchangers alternatively defrost, are used as an evaporator and a condenser in turn, and can still provide heat for the indoor heat exchanger during defrosting. During heating at low temperature, the outdoor heat exchanger B is used as the condenser to heat the inlet air and the inlet air temperature outdoors is raised. Therefore, the coefficient of performance and the heating capacity are effectively improved.

Description

Outdoor double heat exchanger defrosting low-temperature heating system
Technical field
The invention belongs to refrigeration heat energy technical field, particularly relate to a kind of outdoor double heat exchanger defrosting low-temperature heating system.
Background technology
The defrost of source pump and low-temperature heating problem are perplexing many manufacturing firms always, are restricting the popularization and the range of application of heat pump air conditioner, Teat pump boiler and air conditioner and water heater.At present generally adopt reverse defrost of cross valve and hot-gas bypass defrost, the shortcoming of the reverse defrost of cross valve: can be from indoor or hot water draw heat, stop heat supply, influence indoor or hot water temperature, room temperature or hot water temperature are fluctuateed bigger, comfortableness is relatively poor; High-low pressure fluctuation is bigger during defrost, impacts bigger to compressor, cross valve; The heat that the overwhelming majority relies on the power of compressor consumption to produce carries out defrost, and it is bigger to consume energy.The shortcoming of hot-gas bypass defrost: condensation of refrigerant becomes liquid after the defrost, does not just directly get into gas-liquid separator through pervaporation, returns compressor then, is prone to compressor is caused liquid hammer; Rely on the heat of the power generation of compressor consumption to carry out defrost, it is bigger to consume energy, and the defrost time is longer, needs strict control defrost periods and time.When winter temperature is low, the frequent defrost of unit, actual heating effect is undesirable, and the coefficient of performance is lower.
In addition, source pump heating effect when low temperature is very poor, and winter is all right in the areas to the south, the Changjiang river, and basically without heat pump, range of application is less to the north of the Yellow River.The producer that has at present adopts air compensating system, but air supply compressor only just has in the customization of compressor producer, and range of application is less, and the heating capacity of air compensating system only increases about 10~20%.Be exactly to adopt subcooler system or hydrojet cooling system in addition, heating capacity only increases about 5~10%.
Summary of the invention
Technical problem to be solved by this invention provides a kind of outdoor double heat exchanger defrosting low-temperature heating system, and two outdoor heat exchangers replace defrost, in turn as evaporimeter and condenser, and still can be during defrost to the indoor set heat supply; When low-temperature heating, outdoor heat exchanger B heats air intake as condenser, improves outdoor EAT, increases degree of supercooling, and simultaneously all right defrost makes full use of condensation heat.When high temperature freezed, outdoor heat exchanger B was cooled off air intake as evaporimeter, reduced outdoor EAT, increased degree of supercooling simultaneously.Effectively improve the coefficient of performance (Energy Efficiency Ratio) and heat (cold) amount, solve the fragile problem of heat pump compressor, and comfortableness is better.
The technical solution adopted for the present invention to solve the technical problems is: a kind of outdoor double heat exchanger defrosting low-temperature heating system is provided; Comprise compressor, first outdoor heat exchanger, second outdoor heat exchanger, first throttle device, second throttling arrangement; The turnover pipe of described first throttle device and the 3rd magnetic valve connects together, and has common turnover pipe; One end of first outdoor heat exchanger and an end of second outdoor heat exchanger connect the common turnover pipe at first throttle device and the 3rd magnetic valve two ends respectively; First outdoor heat exchanger and the second outdoor heat exchanger other end link to each other with the arbitrary end tracheae E or the C of four-way change-over valve respectively, or are connected with C with the two ends tracheae E of same four-way change-over valve.
Described second outdoor heat exchanger is arranged in the inlet side, air earlier through behind second outdoor heat exchanger again through first outdoor heat exchanger; First outdoor heat exchanger and second outdoor heat exchanger are overall structure, or branch is arranged.
Described system is a heat pump type air conditioner system; Comprise first four-way change-over valve, second four-way change-over valve, indoor heat exchanger, second throttling arrangement; The D end of described first four-way change-over valve, second four-way change-over valve also links to each other with compressor exhaust pipe together; The S end of first four-way change-over valve, second four-way change-over valve links to each other with the compressor return air pipe through vapour liquid separator also together, and two four-way change-over valves are the parallel connection relation; First outdoor heat exchanger links to each other with an end tracheae C of the first cross valve reversal valve, the second cross valve reversal valve respectively with the second outdoor heat exchanger other end; The air inlet pipe of indoor heat exchanger links to each other with the first cross valve reversal valve, the second cross valve reversal valve other end tracheae E through first magnetic valve, second magnetic valve; Described first magnetic valve, second magnetic valve can use a two-position three-way valve to replace.
The D end of described second four-way change-over valve links to each other through the liquid pipe of the 4th magnetic valve and indoor heat exchanger, and the second four-way change-over valve two ends tracheae E is connected with first outdoor heat exchanger, second outdoor heat exchanger respectively with C; One end tracheae E of the first cross valve reversal valve is connected with indoor heat exchanger, and the S end of the other end tracheae C and second four-way change-over valve is connected; The 4th magnetic valve and the parallel connection of second throttling arrangement; When described second throttling arrangement was electric expansion valve, node b can be connected with C, broke off between node a, the b simultaneously.
The S end and an end tracheae C of described second four-way change-over valve link together through the 5th magnetic valve, and the second four-way change-over valve two ends tracheae E is connected with first outdoor heat exchanger, second outdoor heat exchanger respectively with C; Second throttling arrangement, one end is connected through the liquid pipe of the 6th magnetic valve and indoor heat exchanger, and the other end is connected with the common ends of first throttle device and the 3rd magnetic valve; Described the 4th magnetic valve, four or six magnetic valves can use a two-position three-way valve to replace; When said second throttling arrangement was electric expansion valve, the 6th magnetic valve can remove.
Described system is a heat pump water heater system; Comprise hot water heat exchanger, second four-way change-over valve and second throttling arrangement, it is characterized in that: import connects together and links to each other with the blast pipe of compressor the D of described second four-way change-over valve end with hot water heat exchanger through the 4th magnetic valve; The S end and the tracheae C of first four-way change-over valve couple together through the 7th magnetic valve; The second four-way change-over valve two ends tracheae E is connected with first outdoor heat exchanger, second outdoor heat exchanger respectively with C; After the 8th magnetic valve and the second throttling arrangement parallel connection, an end links to each other with hot water heat exchanger liquid pipe, and the other end is connected with the common ends of first throttle device and the 3rd magnetic valve.
The D end of described second four-way change-over valve links to each other through the liquid pipe of the 4th magnetic valve and hot water heat exchanger, and the second four-way change-over valve two ends tracheae E is connected with first outdoor heat exchanger, second outdoor heat exchanger respectively with C; The 4th magnetic valve and the parallel connection of second throttling arrangement; When described second throttling arrangement was electric expansion valve, node b can be connected with C, broke off between node a, the b simultaneously.
The S end and the tracheae C of described second four-way change-over valve link together through the 7th magnetic valve, and the second four-way change-over valve two ends tracheae E is connected with first outdoor heat exchanger, second outdoor heat exchanger respectively with C; Second throttling arrangement, one end is connected through the liquid pipe of the 6th magnetic valve and hot water heat exchanger, and the other end is connected with the common ends of first throttle device and the 3rd magnetic valve; Described the 4th magnetic valve, the 6th magnetic valve can use a two-position three-way valve to replace; When said second throttling arrangement was electric expansion valve, the 6th magnetic valve can remove.
Described system is an air-conditioning water heater system; Comprise first four-way change-over valve, second four-way change-over valve, indoor heat exchanger, hot water heat exchanger, the 3rd throttling arrangement; The 4th throttling arrangement, the 5th throttling arrangement, the D end of described first four-way change-over valve, second four-way change-over valve also links to each other with compressor exhaust pipe together, and the S end of first four-way change-over valve, second four-way change-over valve is also together; Link to each other with the compressor return air pipe through vapour liquid separator, two four-way change-over valves are the parallel connection relation; First outdoor heat exchanger links to each other with an end tracheae C of the first cross valve reversal valve, the second cross valve reversal valve respectively with the second outdoor heat exchanger other end; The air inlet pipe of indoor heat exchanger links to each other with the first cross valve reversal valve, the second cross valve reversal valve other end tracheae E through first magnetic valve, second magnetic valve; After the turnover pipe of the 3rd throttling arrangement and the 9th magnetic valve connects together, the liquid pipe of a termination indoor heat exchanger, the other end is connected with the common ends of first throttle device and the 3rd magnetic valve; The liquid pipe of the 4th throttling arrangement one termination indoor heat exchanger, the liquid pipe of another termination hot water heat exchanger; The liquid pipe of the 5th throttling arrangement one termination hot water heat exchanger, the other end is connected with the common ends of first throttle device and the 3rd magnetic valve; Described first magnetic valve, second magnetic valve can use a two-position three-way valve to replace.
The D end of second four-way change-over valve links to each other through the liquid pipe of the 4th magnetic valve, the tenth magnetic valve and indoor heat exchanger, and the second four-way change-over valve two ends tracheae E is connected with first outdoor heat exchanger, second outdoor heat exchanger respectively with C; One end tracheae E of the first cross valve reversal valve is connected with indoor heat exchanger, and the S end of the other end tracheae C and second four-way change-over valve is connected; After the 4th magnetic valve and the second throttling arrangement parallel connection, an end is connected through the liquid pipe of the tenth magnetic valve and indoor heat exchanger, and the D end of the other end and second four-way change-over valve is connected; After the 11 magnetic valve and the 4th throttling arrangement parallel connection, an end is connected through the liquid pipe of the tenth magnetic valve and indoor heat exchanger, and the liquid pipe of the other end and hot water heat exchanger is connected.
Described each throttling arrangement can be capillary, heating power expansion valve, and electric expansion valve, during for electric expansion valve, the magnetic valve of its corresponding series connection does not need; The C of described each four-way change-over valve end can exchange with the E end, gets electric and dead electricity realizes through the control four-way change-over valve; Between described compressor exhaust pipe and the muffler oil eliminator is housed, or on the muffler of compressor gas-liquid separator is housed, or on the heat exchanger liquid pipe reservoir annex is housed.
Described indoor heat exchanger and hot water heat exchanger can be separate type or monoblock type, and separate type connects through refrigerant tubing or waterpipe, and monoblock type is placed on unit inside; Described indoor heat exchanger is hot and cold water type or cold and hot wind type; Described compressor and indoor heat exchanger can be at least 2 parallel connections, and each indoor heat exchanger all is with an electric expansion valve.
Beneficial effect
Technical problem to be solved by this invention provides a kind of outdoor double heat exchanger defrosting low-temperature heating system, and two outdoor heat exchangers replace defrost, in turn as evaporimeter and condenser, and still can be during defrost to the indoor set heat supply; When low-temperature heating, outdoor heat exchanger B heats air intake as condenser, improves outdoor EAT.And can be when high temperature to freeze, outdoor heat exchanger B can be used as evaporimeter air intake is cooled off, and reduces outdoor EAT.The protection compressor improves the room comfortableness simultaneously, keeps the constant of hot water temperature, improves the coefficient of performance and heating capacity, and heating capacity increases about more than 20%, and the coefficient of performance improves about 20 ~ 50% during low temperature.
Description of drawings
Fig. 1 heat pump property air-conditioning system one;
Fig. 2 heat pump property air-conditioning system two;
Fig. 3 heat pump property air-conditioning system three;
Fig. 4 heat pump water heater system one;
Fig. 5 heat pump water heater system two;
Fig. 6 heat pump water heater system three;
Fig. 7 air-conditioning water heater system one;
Fig. 8 air-conditioning water heater system two.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1 heat pump property air-conditioning system one
Air-conditioning system as shown in Figure 1; Comprise compressor 1; First four-way change-over valve 2, second four-way change-over valve 3, first outdoor heat exchanger 6, second outdoor heat exchanger 7, first throttle device 9, second throttling arrangement 10, indoor heat exchanger 11; First magnetic valve 4 and second magnetic valve 5, the exhaust of compressor 1 flow to the D end of first four-way change-over valve 2 and second four-way change-over valve 3 respectively; One end of one end of first outdoor heat exchanger 6 and second outdoor heat exchanger 7 connects the common turnover pipe at first throttle device 9 and the 3rd magnetic valve 8 two ends respectively; First outdoor heat exchanger 6 and second outdoor heat exchanger, 7 other ends link to each other with the arbitrary end tracheae E or the C of the first cross valve reversal valve 2, the second cross valve reversal valve 3 respectively; The air inlet pipe of indoor heat exchanger 11 links to each other with the first cross valve reversal valve 2, the second cross valve reversal valve, 3 tracheae E respectively through first magnetic valve 4, second magnetic valve 5; The S end of the first cross valve reversal valve 2 and the second cross valve reversal valve 3 links together, and first and second cross valve reversal valve is the parallel connection relation; Described first magnetic valve 4, second magnetic valve 5 can use a two-position three-way valve to replace.Explain with the valve control and the flow process of each circulation below.
Normal kind of refrigeration cycle:
Magnetic valve 5, magnetic valve 8 are opened, and magnetic valve 4 cuts out; The D of four-way change-over valve 2 and four-way change-over valve 3 links to each other with C, and E links to each other with S, and throttling arrangement 10 works.
The high temperature kind of refrigeration cycle:
Magnetic valve 5 is opened, and magnetic valve 4, magnetic valve 8 are closed; The D of four-way change-over valve 2 links to each other with E, and C links to each other with S; The D of four-way change-over valve 3 links to each other with C, and E links to each other with S; Throttling arrangement 9 and throttling arrangement 10 work.
Normally heat circulation:
Magnetic valve 5, magnetic valve 8 are opened, and magnetic valve 4 cuts out; The D of four-way change-over valve 2 and four-way change-over valve 3 links to each other with E, and C links to each other with S; Throttling arrangement 10 works.
Low-temperature heating circulation and defrost circulation 2:
Magnetic valve 5 is opened, and magnetic valve 4, magnetic valve 8 are closed; The D of four-way change-over valve 2 links to each other with C, and E links to each other with S; The D of four-way change-over valve 3 links to each other with E, and C links to each other with S; Throttling arrangement 9 and throttling arrangement 10 work.
Defrost circulation 1:
Magnetic valve 4 is opened, and magnetic valve 5, magnetic valve 8 are closed; The D of four-way change-over valve 2 links to each other with E, and C links to each other with S; The D of four-way change-over valve 3 links to each other with C, and E links to each other with S; Throttling arrangement 9 works.
Embodiment 2 heat pump property air-conditioning systems two
Air-conditioning system as shown in Figure 2, the D end of the blast pipe of compressor 1 and the first cross valve reversal valve 2 is connected, and an end tracheae E of the first cross valve reversal valve 2 is connected with indoor heat exchanger 11, and the S end of the other end tracheae C and second four-way change-over valve 3 is connected; Second four-way change-over valve, 3 two ends tracheae E and C are connected with first outdoor heat exchanger 6, second outdoor heat exchanger 7 respectively; Second throttling arrangement 10, the 4th magnetic valve 12, the four magnetic valves 12 and 10 parallel connections of second throttling arrangement are arranged between the liquid pipe of the D of second four-way change-over valve 3 end and indoor heat exchanger 11; When described second throttling arrangement 10 was electric expansion valve, node b can be connected with C, broke off between node a, the b simultaneously.Explain with the valve control and the flow process of each circulation below.
Normal kind of refrigeration cycle:
Magnetic valve 8 is opened, and magnetic valve 12 cuts out; The D of four-way change-over valve 2 and four-way change-over valve 3 links to each other with C, and E links to each other with S; Throttling arrangement 10 works.
The high temperature kind of refrigeration cycle:
Magnetic valve 12 is opened, and magnetic valve 8 cuts out; The D of four-way change-over valve 2 and four-way change-over valve 3 links to each other with C, and E links to each other with S; Throttling arrangement 9 works.
Normally heat circulation:
Magnetic valve 8 is opened, and magnetic valve 12 cuts out; The D of four-way change-over valve 2 links to each other with E, and C links to each other with S; The D of four-way change-over valve 3 links to each other with C, and E links to each other with S; Throttling arrangement 10 works.
Low-temperature heating circulation and defrost circulation 2:
Magnetic valve 12 is opened, and magnetic valve 8 cuts out; The D of four-way change-over valve 2 links to each other with E, and C links to each other with S; The D of four-way change-over valve 3 links to each other with C, and E links to each other with S; Throttling arrangement 9 works.
Defrost circulation 1:
Magnetic valve 12 is opened, and magnetic valve 8 cuts out; The D of four-way change-over valve 2 and four-way change-over valve 3 links to each other with E, and C links to each other with S; Throttling arrangement 9 works.
Embodiment 3 heat pump property air-conditioning systems three
Air-conditioning system as shown in Figure 3, the D end of the blast pipe of compressor 1 and the first cross valve reversal valve 2 is connected, and an end tracheae E of the first cross valve reversal valve 2 is connected with indoor heat exchanger 11, and the S end of the other end tracheae C and second four-way change-over valve 3 is connected; Second four-way change-over valve 3 two ends tracheae E and C in addition is connected with first outdoor heat exchanger 6, second outdoor heat exchanger 7 respectively; Between the liquid pipe of the D of second four-way change-over valve 3 end and indoor heat exchanger 11, the 4th magnetic valve 12 is arranged; The S end of second four-way change-over valve 3 and arbitrary end tracheae E or C link together through the 5th magnetic valve 17; Second throttling arrangement, 10 1 ends are connected through the liquid pipe of the 6th magnetic valve 16 and indoor heat exchanger 11, and the other end is connected with the common ends of first throttle device 9 and the 3rd magnetic valve 8; Described the 4th magnetic valve 12, the 6th magnetic valve 16 can use a two-position three-way valve to replace; When said second throttling arrangement 10 was electric expansion valve, the 6th magnetic valve 16 can remove.Explain with the valve control and the flow process of each circulation below.
Normal kind of refrigeration cycle:
Magnetic valve 8, magnetic valve 16, magnetic valve 17 are opened, and magnetic valve 12 cuts out; The D of four-way change-over valve 2 and four-way change-over valve 3 links to each other with C, and E links to each other with S; Throttling arrangement 10 works.
The high temperature kind of refrigeration cycle:
Magnetic valve 8, magnetic valve 16, magnetic valve 17 are closed, and magnetic valve 12 is opened; The D of four-way change-over valve 2 and four-way change-over valve 3 links to each other with C, and E links to each other with S; Throttling arrangement 9 works.
Normally heat circulation:
Magnetic valve 8, magnetic valve 16, magnetic valve 17 are opened, and magnetic valve 12 cuts out; The D of four-way change-over valve 2 links to each other with E, and C links to each other with S; The D of four-way change-over valve 3 links to each other with C, and E links to each other with S; Throttling arrangement 10 works.
Low-temperature heating circulation and defrost circulation 2:
Magnetic valve 8, magnetic valve 16, magnetic valve 17 are closed, and magnetic valve 12 is opened; The D of four-way change-over valve 2 links to each other with E, and C links to each other with S; The D of four-way change-over valve 3 links to each other with C, and E links to each other with S; Throttling arrangement 9 works.
Defrost circulation 1:
Magnetic valve 8, magnetic valve 16, magnetic valve 17 are closed, and magnetic valve 12 is opened; The D of four-way change-over valve 2 and four-way change-over valve 3 links to each other with E, and C links to each other with S; Throttling arrangement 9 works.
Embodiment 4 heat pump water heater systems one
Heat pump water heater system as shown in Figure 4, the D end that contains hot water heat exchanger 14, second four-way change-over valve 3 connects together through the 4th magnetic valve 12 and hot water heat exchanger 14 imports, links to each other with the blast pipe of compressor 1; The S end and an end tracheae C of second four-way change-over valve 3 couple together through the 7th magnetic valve 13; Second four-way change-over valve, 3 two ends tracheae E and C are connected with first outdoor heat exchanger 6, second outdoor heat exchanger 7 respectively; After the 8th magnetic valve 15 and 10 parallel connections of second throttling arrangement, an end links to each other with hot water heat exchanger 14 liquid pipes, and the other end is connected with the common ends of first throttle device 9 and the 3rd magnetic valve 8.Explain with the valve control and the flow process of each circulation below.
Nominal situation heats the water circulation:
Magnetic valve 8, magnetic valve 13 are opened, and magnetic valve 12, magnetic valve 15 are closed; The D of four-way change-over valve 3 links to each other with C, and E links to each other with S; Throttling arrangement 10 works.
Low-temperature heating circulation and defrost circulation 2:
Magnetic valve 8, magnetic valve 13 are closed, and magnetic valve 12, magnetic valve 15 are opened; The D of four-way change-over valve 3 links to each other with C, and E links to each other with S; Throttling arrangement 9 works.
Defrost circulation 1:
Magnetic valve 8, magnetic valve 13, magnetic valve 15 are closed, and magnetic valve 12 is opened; The D of four-way change-over valve 3 links to each other with E, and C links to each other with S; Throttling arrangement 9 works with throttling arrangement 10.
Embodiment 5 heat pump water heater systems two
Heat pump water heater system as shown in Figure 5, the D of second four-way change-over valve 3 end links to each other through the liquid pipe of the 4th magnetic valve 12 and hot water heat exchanger 14, and second four-way change-over valve, 3 two ends tracheae E and C are connected with first outdoor heat exchanger 6, second outdoor heat exchanger 7 respectively; The 4th magnetic valve 12 and 10 parallel connections of second throttling arrangement; When described second throttling arrangement 10 was electric expansion valve, node b can be connected with C, broke off between node a, the b simultaneously.Explain with the valve control and the flow process of each circulation below.
Nominal situation heats the water circulation:
Magnetic valve 8 is opened, and magnetic valve 12 cuts out; The D of four-way change-over valve 3 links to each other with E, and C links to each other with S; Throttling arrangement 10 works.
Low-temperature heating circulation and defrost circulation 2:
Magnetic valve 8 cuts out, and magnetic valve 12 is opened; The D of four-way change-over valve 3 links to each other with C, and E links to each other with S; Throttling arrangement 9 works.
Defrost circulation 1:
Magnetic valve 8 cuts out, and magnetic valve 12 is opened; The D of four-way change-over valve 3 links to each other with E, and C links to each other with S; Throttling arrangement 9 works.
Embodiment 6 heat pump water heater systems three
Heat pump water heater system as shown in Figure 6, the S of second four-way change-over valve 3 end and an end tracheae C link together through the 7th magnetic valve 13, and second four-way change-over valve, 3 two ends tracheae E and C are connected with first outdoor heat exchanger 6, second outdoor heat exchanger 7 respectively; Second throttling arrangement, 10 1 ends are connected through the liquid pipe of the 6th magnetic valve 16 and hot water heat exchanger 14, and the other end is connected with the common ends of first throttle device 9 and the 3rd magnetic valve 8; Described the 4th magnetic valve 12, the 6th magnetic valve 16 can use a two-position three-way valve to replace; When said second throttling arrangement 10 was electric expansion valve, the 6th magnetic valve 16 can remove.Explain with the valve control and the flow process of each circulation below.
Nominal situation heats the water circulation:
Magnetic valve 8, magnetic valve 16 are opened, and magnetic valve 12 cuts out; The D of four-way change-over valve 3 links to each other with C, and E links to each other with S; Throttling arrangement 10 works.
Circulation of low-temperature heating water and defrost circulation 2:
Magnetic valve 8, magnetic valve 16 are closed, and magnetic valve 12 is opened; The D of four-way change-over valve 3 links to each other with C, and E links to each other with S; Throttling arrangement 9 works.
Defrost circulation 1:
Magnetic valve 8, magnetic valve 16 are closed, and magnetic valve 12 is opened; The D of four-way change-over valve 3 links to each other with E, and C links to each other with S; Throttling arrangement 9 works.
Embodiment 7 air-conditioning water heater systems one
Air-conditioning water heater system as shown in Figure 7; Contain first four-way change-over valve 2, second four-way change-over valve 3, indoor heat exchanger 11, hot water heat exchanger 14, electric expansion valve 20; First electric expansion valve 22, second electric expansion valve 23; The D end of first four-way change-over valve 2, second four-way change-over valve 3 also links to each other with compressor 1 blast pipe together; The S end of first four-way change-over valve 2, second four-way change-over valve 3 and together links to each other with compressor 1 muffler through vapour liquid separator, and two four-way change-over valves are parallelly connected the relation; One end of first outdoor heat exchanger 6 and second outdoor heat exchanger 7 links to each other with the tracheae C of the first cross valve reversal valve 2, the second cross valve reversal valve 3 respectively; The air inlet pipe of indoor heat exchanger 11 links to each other with the first cross valve reversal valve 2, the second cross valve reversal valve, 3 other end tracheae E through first magnetic valve 4, second magnetic valve 5; After the turnover pipe of the 3rd electric expansion valve 20 and the 9th magnetic valve 19 connects together, the liquid pipe of a termination indoor heat exchanger 11, the other end is connected with the common ends of the 3rd electric expansion valve 29 and the 3rd magnetic valve 8; The liquid pipe of first electric expansion valve, 22 1 termination indoor heat exchangers 11, the liquid pipe of another termination hot water heat exchanger 14; The liquid pipe of second electric expansion valve, 23 1 termination hot water heat exchangers 14, the other end is connected with the common ends of the 3rd electric expansion valve 29 and the 3rd magnetic valve 8; Described first magnetic valve 4, second magnetic valve 5 can use a two-position three-way valve to replace.Explain with the valve control and the flow process of part circulation below.
Kind of refrigeration cycle
Magnetic valve 5, magnetic valve 8 are opened, and magnetic valve 4, magnetic valve 19 are closed; Electric expansion valve 9, electric expansion valve 22, electric expansion valve 23 are closed; The D of four-way change-over valve 2, four-way change-over valve 3 links to each other with C, and E links to each other with S; Electric expansion valve 20 works.
Heat circulation
Magnetic valve 5, magnetic valve 8 are opened, and magnetic valve 4, magnetic valve 19 are closed; Electric expansion valve 9, electric expansion valve 22, electric expansion valve 23 are closed; The D of four-way change-over valve 2, four-way change-over valve 3 links to each other with E, and C links to each other with S; Electric expansion valve 20 works.
Heat the water circulation:
Magnetic valve 8 is opened, and magnetic valve 5, magnetic valve 4, magnetic valve 19 are closed; Electric expansion valve 9, electric expansion valve 20, electric expansion valve 22 are closed; The D of four-way change-over valve 2, four-way change-over valve 3 links to each other with E, and C links to each other with S; Electric expansion valve 23 works.
The water that freezes+heat circulation:
Magnetic valve 5 is opened, and magnetic valve 4, magnetic valve 8, magnetic valve 19 are closed; Electric expansion valve 9, electric expansion valve 20, electric expansion valve 23 are closed; The D of four-way change-over valve 2, four-way change-over valve 3 links to each other with C, and E links to each other with S; Electric expansion valve 22 works.
Low-temperature heating and defrost circulation 2:
Magnetic valve 5, magnetic valve 19 are opened, and magnetic valve 4, magnetic valve 8 are closed; Electric expansion valve 9, electric expansion valve 20, electric expansion valve 23 are closed; The D of four-way change-over valve 2 links to each other with C, and E links to each other with S, the D of four-way change-over valve 3 links to each other with E, and C links to each other with S; Electric expansion valve 9 works.
Low-temperature heating and defrost circulation 1:
Magnetic valve 4 is opened, and magnetic valve 5, magnetic valve 8, magnetic valve 19 are closed; Electric expansion valve 22, electric expansion valve 23 are closed; The D of four-way change-over valve 2 links to each other with E, and C links to each other with S, the D of four-way change-over valve 3 links to each other with E, and C links to each other with S; Electric expansion valve 9, electric expansion valve 20 work.
Embodiment 8 air-conditioning water heater systems two
Air-conditioning water heater system as shown in Figure 8; The D of second four-way change-over valve 3 end links to each other through the liquid pipe of the 4th magnetic valve 12, the tenth magnetic valve 24 and indoor heat exchanger 11, and second four-way change-over valve, 3 two ends tracheae E and C are connected with first outdoor heat exchanger 6, second outdoor heat exchanger 7 respectively; One end tracheae E of the first cross valve reversal valve 2 is connected with indoor heat exchanger 11, and the S end of the other end tracheae C and second four-way change-over valve 3 is connected; The 4th magnetic valve 12 and 10 parallel connections of second throttling arrangement, an end is connected through the liquid pipe of the tenth magnetic valve 24 and indoor heat exchanger 11, and the D end of the other end and second four-way change-over valve 3 is connected; After the 11 magnetic valve 21 and electric expansion valve 22 parallel connections, an end is connected through the liquid pipe of the tenth magnetic valve 24 and indoor heat exchanger 11, and the liquid pipe of the other end and hot water heat exchanger 14 is connected.Explain with the valve control and the flow process of part circulation below.
Kind of refrigeration cycle
Magnetic valve 8, magnetic valve 24 are opened, and magnetic valve 12, magnetic valve 21 are closed; Electric expansion valve 9, electric expansion valve 22 are closed; The D of four-way change-over valve 2 links to each other with C, and E links to each other with S, and the D of four-way change-over valve 3 links to each other with E, and C links to each other with S;
Electric expansion valve 10 works.
Heat circulation
Magnetic valve 8, magnetic valve 24 are opened, and magnetic valve 12, magnetic valve 21 are closed; Electric expansion valve 9, electric expansion valve 22 are closed; The D of four-way change-over valve 2 links to each other with E, and C links to each other with S, and the D of four-way change-over valve 3 links to each other with C, and E links to each other with S;
Electric expansion valve 10 works.
Heat the water circulation:
Magnetic valve 8, magnetic valve 21 are opened, and magnetic valve 12, magnetic valve 24 are closed; Electric expansion valve 9, electric expansion valve 22 are closed; The D of four-way change-over valve 2 links to each other with E, and C links to each other with S, and the D of four-way change-over valve 3 links to each other with C, and E links to each other with S;
Electric expansion valve 10 works.
The water that freezes+heat circulation:
Magnetic valve 24 is opened, and magnetic valve 8, magnetic valve 12, magnetic valve 21 are closed; Electric expansion valve 9, electric expansion valve 10 are closed; The D of four-way change-over valve 2 links to each other with C, and E links to each other with S; Electric expansion valve 22 works.
Low-temperature heating and defrost circulation 2:
Magnetic valve 12, magnetic valve 24 are opened, and magnetic valve 8, magnetic valve 21 are closed; Electric expansion valve 10, electric expansion valve 22 are closed; The D of four-way change-over valve 2 links to each other with E, and C links to each other with S; The D of four-way change-over valve 3 links to each other with C, and E links to each other with S; Electric expansion valve 9 works.
Low-temperature heating and defrost circulation 1:
Magnetic valve 12, magnetic valve 24 are opened, and magnetic valve 8, magnetic valve 21 are closed; Electric expansion valve 10, electric expansion valve 22 are closed; The D of four-way change-over valve 2, four-way change-over valve 3 links to each other with E, and C links to each other with S; Electric expansion valve 9 works.

Claims (4)

1. outdoor double heat exchanger defrosting low-temperature heating system; Comprise compressor (1), first outdoor heat exchanger (6), second outdoor heat exchanger (7), first throttle device (9), second throttling arrangement (10); It is characterized in that: the turnover pipe of described first throttle device (9) and the 3rd magnetic valve (8) connects together, and has common turnover pipe; One end of first outdoor heat exchanger (6) connect first throttle device (9) and the 3rd magnetic valve (8) two ends when being in normal refrigeration situation common turnover pipe go out pipe, the inlet pipe of the common turnover pipe at first throttle device (9) and the 3rd magnetic valve (8) the two ends when end connection of second outdoor heat exchanger (7) is in normal refrigeration situation; The other end of first outdoor heat exchanger (6) links to each other with the arbitrary end tracheae E or the C of second four-way change-over valve (3); The other end of second outdoor heat exchanger (7) links to each other with the arbitrary end tracheae E or the C of first four-way change-over valve (2), or the two ends tracheae E of first outdoor heat exchanger (6) and second outdoor heat exchanger (7) other end and same four-way change-over valve is connected with C; Described second outdoor heat exchanger (7) is arranged in the inlet side, air earlier through behind second outdoor heat exchanger (7) again through first outdoor heat exchanger (6); First outdoor heat exchanger (6) and second outdoor heat exchanger (7) are overall structure, or branch is arranged; Described system is a heat pump type air conditioner system; Comprise first four-way change-over valve (2), second four-way change-over valve (3), indoor heat exchanger (11), second throttling arrangement (10); The D end of described first four-way change-over valve (2), second four-way change-over valve (3) also links to each other with compressor (1) blast pipe together; The S end of first four-way change-over valve (2), second four-way change-over valve (3) links to each other with compressor (1) muffler through vapour liquid separator also together, and two four-way change-over valves are the parallel connection relation; First outdoor heat exchanger (6) other end links to each other with the second cross valve reversal valve (3) one end tracheae C, and an end tracheae C of second outdoor heat exchanger (7) other end and the first cross valve reversal valve (2) links to each other; The air inlet pipe of indoor heat exchanger (11) links to each other with first cross valve reversal valve (2) other end tracheae E through first magnetic valve (4), and the air inlet pipe of indoor heat exchanger (11) links to each other with second cross valve reversal valve (3) other end tracheae E through second magnetic valve (5); Described first magnetic valve (4), second magnetic valve (5) can use a two-position three-way valve to replace.
2. outdoor double heat exchanger defrosting low-temperature heating system according to claim 1 is characterized in that: described each throttling arrangement can be capillary, heating power expansion valve, and electric expansion valve, during for electric expansion valve, its corresponding solenoid valve does not need; The C of described each four-way change-over valve end can exchange with the E end, gets electric and dead electricity realizes through the control four-way change-over valve; Between described compressor (1) blast pipe and the muffler oil eliminator is housed.,
3. outdoor double heat exchanger defrosting low-temperature heating system according to claim 1 is characterized in that: described each throttling arrangement can be capillary, heating power expansion valve, and electric expansion valve, during for electric expansion valve, its corresponding solenoid valve does not need; The C of described each four-way change-over valve end can exchange with the E end, gets electric and dead electricity realizes through the control four-way change-over valve; On the muffler of said compressor (1) gas-liquid separator is housed.
4. according to claim 2 or 3 described outdoor double heat exchanger defrosting low-temperature heating systems, it is characterized in that: described indoor heat exchanger (11) is separate type or monoblock type, and separate type connects through refrigerant tubing or waterpipe, and monoblock type is placed on unit inside; Described indoor heat exchanger (11) is hot and cold water type or cold and hot wind type; Described compressor (1) and indoor heat exchanger (11) can be at least 2 parallel connections, and each indoor heat exchanger (11) all is with an electric expansion valve.
CN201010113352XA 2009-07-03 2010-01-28 Outdoor double heat exchanger defrosting low-temperature heating system CN101788206B (en)

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CN108224837A (en) * 2017-12-19 2018-06-29 青岛海尔空调电子有限公司 Air-conditioner system
CN108800687A (en) * 2018-05-21 2018-11-13 顺德职业技术学院 Dual chamber external heat exchanger heat pump with defrosting function and defrosting method

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