CN102840714B - Heat pump system with hot water function and control method - Google Patents

Heat pump system with hot water function and control method Download PDF

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Publication number
CN102840714B
CN102840714B CN201210307620.0A CN201210307620A CN102840714B CN 102840714 B CN102840714 B CN 102840714B CN 201210307620 A CN201210307620 A CN 201210307620A CN 102840714 B CN102840714 B CN 102840714B
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water
hot water
heat
pump
heat exchanger
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CN102840714A (en
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周锦生
杜玉清
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Trane Air Conditioning Systems China Co Ltd
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Trane Air Conditioning Systems China Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/56Heat recovery units

Abstract

The invention relates to a heat pump system with a hot water function and a control method, wherein the heat pump system has the advantages of being simple in refrigeration system, high in reliability of units and short in development cost period. A water side sub-system comprises parts of heat recycling heat exchangers, hot water pumps and hot water boxes containing heat exchangers, and parts of the heat recycling heat exchangers, the hot water pumps and the hot water boxes containing heat exchangers are connected through hot water pipelines and are located in a hot water circulation return circuit. The water side sub-system further comprises an air conditioner side heat exchanger and an air conditioning water pump which are connected through an air conditioning water pipeline in an air conditioning water circulation return circuit. The water side sub-system further comprises a first communication pipeline and a second communication pipeline, the first communication pipeline is connected with the inlet side of the air conditioner water pipeline and the outlet sides of the hot water boxes, the second communication pipeline is connected with the outlet side of the air conditioner water pipeline and the inlet sides of the hot water boxes, and a three-way valve is arranged at the connecting position where the air conditioner water pipeline is connected with the first communication pipeline or the second communication pipeline.

Description

Heat pump with hot water function and control method thereof
Technical field
The present invention relates to refrigeration air-conditioner and control method thereof, relate in particular to heat pump and control method thereof with hot water function.This heat pump comprises refrigerant side subsystem, water side subsystem, control system, refrigerant side subsystem comprises compressor, part heat recovering heat exchanger, four-way change-over valve, source heat exchanger, expansion gear, air-conditioning side heat exchanger, regulates the flow direction by four-way change-over valve.
Background technology
Existing heat pump can provide refrigeration, heat, and when refrigeration, toward heat source side release heat, while heating, absorbs heat from heat source side, and along with improving constantly that people require comfortableness, the use of heat pump is more and more extensive.Existing Teat pump boiler absorbs heat from heat source side, then rejects heat in water, and client is provided hot water, belongs to energy-saving clean product.Along with the raising of people's living standard, the use amount of hot water strengthens; Along with the enhancing of environmental protection and energy saving consciousness, Teat pump boiler obtains using more and more widely.Freeze, heat in order to meet, the demand of water heating, the simplest way is to purchase heat pump and Teat pump boiler, so relatively takies place, invests also larger simultaneously.Teat pump boiler adopts steam compression cycle, cold-producing medium, compressor, condenser, evaporimeter are used, this point is substantially consistent with heat pump, just on parts He in principle, ensure that heat pump and Teat pump boiler can adopt same cold-producing medium, same compressor, same evaporimeter, thereby saved some parts and the shared place of parts; In addition, when heat pump freezes, need to discharge used heat, Teat pump boiler all carries out water heating throughout the year, if both unifications just can realize refrigeration recuperation of heat, hot water is free; Further, cooling and warming is not all to need always, just can allow heat pump, water heater integrated machine outside cooling and warming, carry out water heating, and heat is accumulated.Based on above-mentioned feasibility analysis, heat pump manufacturer and Teat pump boiler manufacturer are all at oneself multiplex unit of exploitation: freeze, heat, heating water, the thermal source of employing can be air or water or soil or three's combination.
The first generation three alliance units are part recuperation of heat units, at the compressor outlet of source pump, the water-heater heat-exchanging device of connecting, carry out part recuperation of heat, hot water is as the byproduct of cooling and warming, adopt the design method at water source as Fig. 1, system comprises compressor A01, part heat recovering heat exchanger A02, four-way change-over valve A03, water source heat exchanger A04, cold-producing medium throttling arrangement A05, air-conditioning side water-to-water heat exchanger A07, gas-liquid separator A08, heat-exchanger pump A09, water pump of air conditioner A10, source water pump A11.Adopt the design method of air-source as Fig. 2, system comprises compressor B01, part heat recovering heat exchanger B02, four-way change-over valve B03, air-source heat exchanger B04, cold-producing medium throttling arrangement B05, reservoir B06, air-conditioning side water-to-water heat exchanger B07, gas-liquid separator B08, heat-exchanger pump B09, water pump of air conditioner B10, blower fan B11.The method of direct expansion system is as Fig. 3, and system comprises compressor C01, part heat recovering heat exchanger C02, four-way change-over valve C03, air-source heat exchanger C04, cold-producing medium throttling arrangement C05, indoor coil C07, gas-liquid separator C08, heat-exchanger pump C09, indoor fan C10, outdoor fan C11.In the time freezing or heat, carry out water heating, when not freezing or heating, unit cannot carry out water heating, in order to ensure sufficient hot water supply, user needs other hot water solution, such as gas heater, solar water heater, Teat pump boiler, electric heater, when its advantage is refrigeration, hot water is free, and can reach very high temperature, about 65 degrees Celsius; While heating, hot water temperature also can reach approximately 70 degrees Celsius.Chinese patent literature CN00109283.9 has announced relevant method for designing and control method.
The second generation three alliance units are full recuperation of heat units, have drawn the under-supply shortcoming of the first generation three alliance unit hot water, have increased hot water heat exchanger, have improved system pipeline design, emerge the unit of a lot of forms; Wherein, be the most simply after full heat recovering heat exchanger follows compressor closely; When operation, can produce two high-pressure areas: hot water heat exchanger, condenser, its major defect is that coolant injection amount is large, refrigerant management is difficult, especially in air source heat pump system, very risky.In water resource system, problem is fewer, and as Fig. 4, heat recovering heat exchanger D02 follows closely after compressor D01, condenser D03 thereafter, being volume control device D04 afterwards, is then water side evaporimeter D05, and this system is simple, cooling and warming is by water route manual switching, not only cost is low, and can ensure to be all adverse current state at any time, takes full advantage of heat exchanger performance.The cold-producing medium using due to water-to-water heat exchanger is few, and this simple system is very practical.Also have heat recovering heat exchanger D02 is done with condenser D03 together with, such as a case tube heat exchanger, top is recuperation of heat heat-exchanging tube bundle, bottom is condensation tube bank, while needing full recuperation of heat, condensation water route is stopped, in service, can not cause cold-producing medium to lack or unnecessary.This method is applicable to water resource system, is not suitable for air-source system.In the application of water resource system, be not suitable for the frequent occasion of switching of needs very much yet, under the pipe-connecting mode of refrigeration, if there is no the demand of refrigeration, just do not produce the function of hot water, some inconvenience, needs a thermal water source for subsequent use.
The third generation three alliance units are also full recuperation of heat units, more complicated to be hot water heat exchanger in parallel with condenser, evaporimeter, when operation, only have a heat exchanger in high pressure conditions; Two other heat exchanger, flows through without cold-producing medium in idle state for one, and in low-pressure side, cold-producing medium is flowed through another in evaporating state, also in low-pressure side, has cold-producing medium to flow through; Water resource system as Fig. 5, system comprises compressor E01, the first four-way change-over valve E02, the second four-way change-over valve E03, part heat recovering heat exchanger E04, water source heat exchanger E05, air-conditioning side water-to-water heat exchanger E06, the first cold-producing medium throttling arrangement E07a, second refrigerant throttling arrangement E07b, gas-liquid separator E08, heat-exchanger pump E09, water pump of air conditioner E10, source water pump E11, check valve E12; Air-source system as Fig. 6, system comprises compressor F01, the first four-way change-over valve F02, the second four-way change-over valve F03, air-source heat exchanger F04, part heat recovering heat exchanger F05, air-conditioning side water-to-water heat exchanger F06, the first cold-producing medium throttling arrangement F07a, second refrigerant throttling arrangement F07b, reservoir F08, gas-liquid separator F09, heat-exchanger pump F10, water pump of air conditioner F11, blower fan F12, check valve F13; Carry out cold-producing medium commutation by two four-way change-over valve E02 and E03 or F02 and F03, when water heating, by cross valve, compressor air-discharging is imported in hot water heat exchanger; Chinese patent literature CN200720124373.5 discloses relevant design and running method.Can realize refrigeration recuperation of heat, single water heating, freeze and heat, main problem or refrigerant managing difficulty, unit switches a large amount of problems that easily produce, and causes the construction cycle long, field failure rate is high.
The 4th generations three alliance unit be also full recuperation of heat unit, it has used for reference third generation pluses and minuses, the function that has increased water heating simultaneously and heated.As Fig. 7, system comprises compressor G01, the first magnetic valve G02a, the second magnetic valve G02b, four-way change-over valve G03, air-source heat exchanger G04, part heat recovering heat exchanger G05, air-conditioning side water-to-water heat exchanger G06, the first cold-producing medium throttling arrangement G07a, second refrigerant throttling arrangement G07b, reservoir G08, gas-liquid separator G09, heat-exchanger pump G10, water pump of air conditioner G11, blower fan G12, check valve G13; In Chinese patent literature CN200520047214.0, announce its just one step process, opened the first magnetic valve G02a and the second magnetic valve G02b, can realize while water heating and heat.But it still has the main shortcoming of third generation unit: cold-producing medium is difficult to management, unit risk of handover is large, the construction cycle is long, fault rate is high, compressor reliability is not high.
While producing domestic hot-water, also can encounter the problem of chloride ion corrosion in running water.Hot water heat exchanger is all generally that running water directly flows through, and object is in order to reduce heat transfer temperature difference, has chlorion endlessly in running water, produces certain corrosiveness, so the place contacting with running water utilizes copper pipe as far as possible.Adopt at present the heat exchanger of copper pipe, the one, case tube heat exchanger, the 2nd, double-tube heat exchanger.Case tube heat exchanger pressure drop is little, after can being connected on compressor, often can use, and cold is large in R22, R407C, R134a, R123 system; While adopting R410A as cold-producing medium, heat exchanger tube need to increase wall thickness, and cost rises, therefore seldom use.Double-tube heat exchanger pressure drop is large, and cold is little, after not generally being connected on compressor.Partial heat recovery type unit adopts stainless steel plate type heat exchanger in addition, owing to being easily subject to chloride ion corrosion, so do not advise directly contacting with running water, can pass through middle heat exchange mode, need to increase pump, can produce some losses simultaneously.Plate type heat exchanger is because pressure drop is little, compact, therefore often applied in heat recovery system.
Summary of the invention
The object of the present invention is to provide a kind of heat pump and control method thereof with hot water function, it improves at water side subsystem, by switch flow of hot water to, freezing, to heat, water heating, refrigeration recuperation of heat, heat simultaneously the plurality of operating modes such as water heating.
For realizing the heat pump with hot water function of described object, have: refrigerant side subsystem, water side subsystem, control system, refrigerant side subsystem comprises compressor, part heat recovering heat exchanger, four-way change-over valve, source heat exchanger, expansion gear, air-conditioning side heat exchanger, and refrigerant side subsystem regulates the flow direction by four-way change-over valve; It is characterized in that, water side subsystem comprises described part heat recovering heat exchanger, heat-exchanger pump, contains the boiler of heat exchanger, and described part heat recovering heat exchanger, heat-exchanger pump, boiler connect by hot water line, are arranged in hot water circulation loop; Water side subsystem also comprises described air-conditioning side heat exchanger, water pump of air conditioner, and described air-conditioning side heat exchanger, water pump of air conditioner connect by air conditioner water pipeline, are arranged in air conditioner water closed circuit; Water side subsystem also comprises the first connecting pipeline, the second connecting pipeline, and the first connecting pipeline connects the inlet side of air conditioner water pipeline and the outlet side of boiler, and the second connecting pipeline connects the outlet side of air conditioner water pipeline and the entrance side of boiler; Be placed in the triple valve of the junction of air conditioner water pipeline and the first connecting pipeline or the second connecting pipeline.
The described heat pump with hot water function, its further feature is that the cold-producing medium that refrigerant side subsystem adopts is R32.
The described heat pump with hot water function, its further feature is that when the operation of refrigerant side subsystem, cold-producing medium only has a flow direction; Hot water circulation loop and air conditioner water closed circuit share expansion tank and moisturizing point.
The described heat pump with hot water function, its further feature is, water side subsystem also comprises heat-exchanger pump check valve, and described heat-exchanger pump uses check valve between the first connecting pipeline and part heat recovering heat exchanger or between part heat recovering heat exchanger and the second connecting pipeline.
The described heat pump with hot water function, its further feature is, described triple valve is positioned on air conditioner water pipeline, and first mouth of triple valve connects the first connecting pipeline, second mouth of triple valve connects air conditioner water backwater, before the 3rd mouth of triple valve is connected on air-condition heat exchanger and water pump; First mouthful and the 3rd mouth are communicated with, or the 3rd mouth and second mouth connection.
The described heat pump with hot water function, its further feature is, triple valve is positioned on air conditioner water pipeline, and first mouth of triple valve connects the second connecting pipeline, second mouth of triple valve connects air conditioner water water outlet, after the 3rd mouth of triple valve connects air-condition heat exchanger and water pump; First mouthful and the 3rd mouth are communicated with, or the 3rd mouth and second mouth connection.
The described heat pump with hot water function, its further feature is that expansion tank and moisturizing point are placed on the first connecting pipeline or on the second connecting pipeline.
The described heat pump with hot water function, its further feature is that the outlet side of boiler is the outlet of heat exchanger in boiler, the entrance that the entrance side of boiler is this heat exchanger.
The described heat pump with hot water function, its further feature is that the water supplement port of boiler is the entrance of heat exchanger in boiler, the outlet that domestic hot-water's outlet of boiler is this heat exchanger.
The described heat pump with hot water function, its further feature is, described compressor is that the combination of variable-flow compression machine or multiple compressors is so that can realize as required energy adjustment.
The described heat pump with hot water function, its further feature is, described control system comprises that environment temperature sniffer, boiler temperature detection device, delivery temperature sniffer, clock, operational mode selecting arrangement, the hot water scheduled time arrange that device, hot water minimum temperature arrange device, hot water demand's temperature arranges device, CPU.
The described heat pump with hot water function, its further feature is, and described control system also comprises operational mode selecting arrangement, and operational mode selecting arrangement can provide customer selecting operational mode, comprises refrigeration, heats or force hot water.
The control method that is used in the aforementioned heat pump with hot water function of stating, is characterized in comprising following control model:
A, single water heating pattern, operation compressor, use part heat recovering heat exchanger, make four-way change-over valve in heating state, make air-conditioning side heat exchanger in condensing state, make source heat exchanger in evaporating state, operation water pump of air conditioner, operation heat-exchanger pump, triple valve state is that air conditioner water closed circuit and hot water circulation loop are communicated with, air-conditioning current do not enter indoor;
B, refrigeration heat recovery mode, operation compressor, use part heat recovering heat exchanger, make four-way change-over valve in refrigerating state, air-conditioning side heat exchanger is in evaporating state, and source heat exchanger is in condensing state, operation water pump of air conditioner, operation heat-exchanger pump, triple valve state is that air conditioner water closed circuit and hot water circulation loop are disconnected, air-conditioning current can enter indoor;
C, refrigeration mode, operation compressor, do not use part heat recovering heat exchanger, make four-way change-over valve in refrigerating state, air-conditioning side heat exchanger is in evaporating state, and source heat exchanger is in condensing state, operation water pump of air conditioner, do not move heat-exchanger pump, triple valve state is that air conditioner water closed circuit and hot water circulation loop are disconnected, and air-conditioning current can enter indoor;
D, heating mode, operation compressor, do not use part heat recovering heat exchanger, make four-way change-over valve in heating state, air-conditioning side heat exchanger is in condensing state, and source heat exchanger is in evaporating state, operation water pump of air conditioner, do not move heat-exchanger pump, triple valve state is that air conditioner water closed circuit and hot water circulation loop are disconnected, and air-conditioning current can enter indoor;
E, heat simultaneously water heating pattern, operation compressor, use part heat recovering heat exchanger, make four-way change-over valve in heating state, air-conditioning side heat exchanger is in condensing state, and source heat exchanger is in evaporating state, water pump of air conditioner operation, heat-exchanger pump operation, triple valve state is that air conditioner water closed circuit and hot water circulation loop are disconnected, air-conditioning current can enter indoor.
Described control method, its further feature is that unit is preferentially produced the hot water of meeting consumers' demand, and carries out model selection according to user's cooling and warming demand simultaneously, according to user's request hot water time hot water preparing, regulate hot water to produce speed according to hot water demand's pressing degree; Wherein user can arrange minimum hot water temperature and set value THWSL, hot water demand's desired temperature THWSR, hot water demand's time, operational mode; Unit, according to input parameter, carries out model selection.
Described control method, its further feature is, carries out operational mode while selecting, when hot water temperature THW is not more than minimum hot water temperature and sets value THWSL, unit carries out single water heating pattern.
Described control method, its further feature is, carries out operational mode while selecting, when hot water temperature THW is greater than hot water temperature's requirements set value THWSR, the not single water heating of unit, unit first freezes or heats according to user's input pattern.
Described control method, its further feature is, hot water temperature THW during lower than delivery temperature X1, opens heat-exchanger pump, the recuperation of heat or heat water heating simultaneously of freezing.
Described control method, its further feature is, while carrying out operational mode selection, if hot water temperature THW sets value THWSL higher than minimum hot water temperature and lower than hot water temperature's requirements set value THWSR, and while being less than 30* (THSWR-THW)/(THWSR-THWSL) minute the time apart from hot water demand, unit carries out single water heating mode operation.
Described control method, its further feature is, when operational mode selecting arrangement, if hot water temperature THW sets value THWSL higher than minimum hot water temperature and lower than hot water temperature's requirements set value THWSR, and while being greater than 30* (THSWR-THW)/(THWSR-THWSL) minute the time apart from hot water demand, unit first freezes or heats according to user's input pattern.
Described control method, its further feature is, and hot water temperature THW is during lower than delivery temperature X1, and unit hot water water pump is opened, the recuperation of heat or heat water heating simultaneously of freezing.
Described control method, its further feature is, when operational mode selecting arrangement, if hot water temperature THW sets value THWSL higher than minimum hot water temperature and lower than hot water temperature's requirements set value THWSR, and while being greater than 30* (THSWR-THW)/(THWSR-THWSL) minute the time apart from hot water demand, when user's input pattern is water heating pattern, unit carries out single water heating pattern.
Described control method, its further feature is, when operational mode selecting arrangement, if hot water temperature THW sets value THWSL higher than minimum hot water temperature and lower than hot water temperature's requirements set value THWSR, and while being greater than 30* (THSWR-THW)/(THWSR-THWSL) minute the time apart from hot water demand, user is during without input pattern, and unit carries out selecting whether to carry out single water heating with the place moment according to environment temperature.
Described control method, its further feature is, environment temperature is during lower than X2, and the time between 12 noon to 15, unit carries out single water heating.
Described control method, its further feature is, under described single water heating pattern, the speed of service of compressor reduces according to the rising of water temperature, in the time that water temperature sets value THWSL lower than minimum hot water temperature, compressor is with Y2 speed operation, and in water temperature, during higher than hot water demand's desired temperature THWSR, compressor moves with lowest reliable speed of service Y1.
Described control method, its further feature is, Y2>3000rpm, Y1 is 1800rpm.
Described control method, its further feature is that compressor operating speed raises and is linear decline with hot water water temperature.
Described control method, its further feature is, under described single water heating pattern, adopts the outer machine fan speed of service of air-source to determine according to environment temperature, reduce with the rising of environment temperature, in environment temperature during lower than X5, blower fan full speed running.
Described control method, its further feature is that the rotating speed of blower fan is linear decline with the rising of temperature.
In an embodiment of the present invention, wherein operational mode selecting arrangement can provide customer selecting operational mode, comprises refrigeration, heats, forces hot water; The hot water scheduled time arranges device, is used for ensureing that client is in the time that the scheduled time arrives, and has a hot water temperature who satisfies the demands, such as 50 degree.Hot water minimum temperature arranges device, is used for arranging the minimum temperature of water tank, and reduces the single water heating of frequent start, for the user of a small amount of hot water of frequent needs, need to ensure a minimum temperature, can set and be about 30 degree, too low meeting is set and cause this function inoperative.Hot water demand's temperature arranges device, is used for ensureing that user is in the time that the scheduled time arrives, and can ensure some primary demands of user, as bathing.Control processor is used for a temperature value, set model, setting value collection and arranges, and according to logic judgement, determines to take which kind of operational mode.
Mainly to worry be running water to several generations unit before, there is chlorion endlessly can destroy stainless heat exchanger, and the calcium carbonate, the magnesium carbonate that constantly form can produce fouling, hot water heat exchanger adopts copper heat exchanger, main feature is to transform on refrigerant line, switches the flow direction of cold-producing medium, freezes, heats, water heating, because cold-producing medium has gas-liquid two-phase, be difficult to management.Main feature of the present invention is transformed exactly in water lines, switches the flow direction of water, freezes, heats, water heating, refrigeration recuperation of heat, heats water heating simultaneously.The present invention can directly transform formation on first generation unit.
The present invention is with respect to existing unit, and its advantage is that cold-producing medium is convenient to management, heats speed faster simultaneously.At cold day or transition season, adopt one day in the highest environment temperature period carry out water heating, simultaneously compressor adopts frequency reducing scheme, has improved efficiency, has also avoided the situation of frosting; While heating, also carry out water heating, guarantee to obtain high-temperature-hot-water; In hot day, adopt refrigeration recuperation of heat as far as possible, improve refrigerating efficiency, also obtain free hot water.Because refrigerant system is simple, unit reliability is high, and the development cost cycle is short.
Aforementioned objects, features and advantages of the present invention conduct further description in connection with embodiment described later.
Brief description of the drawings
Fig. 1 is part heat recovery water source heat pump system figure.
Fig. 2 is part recuperation of heat air source cold-hot water side subsystem figure.
Fig. 3 is part recuperation of heat air source heat pump system figure.
Fig. 4 is simple water source heat recovery system figure.
Fig. 5 is third generation water source combined supply system figure.
Fig. 6 is third generation air-source combined supply system figure.
Fig. 7 is the 4th generation air-source combined supply system figure.
Fig. 8 is combined supply system schematic diagram of the present invention.
Fig. 9 is the part recuperation of heat schematic diagram that carries out of the present invention.
Figure 10 is single water heating schematic diagram that carries out of the present invention.
Figure 11 is another kind of system schematic of the present invention.
Figure 12 is the composition diagram of control system in the present invention.
Figure 13 is various pattern control chart of the present invention (showing continuously in four pages).
Figure 14 is the compressor control figure under single water heating.
Figure 15 is the outdoor fan control chart under single water heating.
Detailed description of the invention
Referring to accompanying drawing, the present invention is described.
Fig. 8 is heat pump (for the combined supply system) schematic diagram with hot water function of the present invention, and it comprises refrigerant side subsystem and water side subsystem.Refrigerant side subsystem comprises that compressor H01, part heat recovering heat exchanger H02, four-way change-over valve H03, outdoor coil pipe used H04, first throttle device H05, reservoir H06, air-conditioning side water-to-water heat exchanger H07, gas-liquid separator H08, outdoor fan H11, the second throttling arrangement H17 are (for controlling delivery temperature, if all lower than 135 degrees Celsius, can not need in the whole operating mode of delivery temperature).Refrigerant loop comprises two kinds of main operational modes, realizes by the commutation of cross valve.The first is that cross valve H03 is in the time of refrigerating state, cold-producing medium is discharged from compressor H01, along journey in order by way of part heat recovering heat exchanger H02, four-way change-over valve H03, outdoor coil pipe used H04, first throttle device H05, reservoir H06, air-conditioning side water-to-water heat exchanger H07, four-way change-over valve H03, gas-liquid separator H08, then get back to compressor, if delivery temperature is high, the second throttling arrangement H17 opens, shallow bid sprays into compressor air suction mouth containing the fluid of liquid refrigerant, carries out delivery temperature control.The second operational mode of refrigerant loop is that cross valve H03 is in the time heating state, cold-producing medium is discharged from compressor H01, along journey in order by way of part heat recovering heat exchanger H02, four-way change-over valve H03, air-conditioning side water-to-water heat exchanger H07, reservoir H06, first throttle device H05, outdoor coil pipe used H04, four-way change-over valve H03, gas-liquid separator H08, then get back to compressor, if delivery temperature is high, the second throttling arrangement H17 opens, shallow bid sprays into compressor air suction mouth containing the fluid of liquid refrigerant, carries out delivery temperature control.Water side subsystem comprises heat-exchanger pump H09, water pump of air conditioner H10, water route triple valve H13, the first water route threeway H14a, the second water route threeway H14b, the 3rd water route threeway H14c, boiler H15, and part heat recovering heat exchanger H02, air-conditioning side heat exchanger H07 are also the part of water side subsystem.Wherein in boiler H15, have hot-water coil pipe H16, by the adjusting of water route triple valve H13, there are three kinds of operational modes in the water route of water side subsystem.The first operational mode is, triple valve H13 transfers air-conditioning state to, be communicated with heat exchanger H07 by air conditioner water, and cut off the first water route, the water between air conditioner water closed circuit and hot water circulation loop does not flow, when water pump of air conditioner H10 operation, water comes from indoor, enters indoor through water pump of air conditioner H10, heat exchanger H07, process threeway H14c, between threeway H14a and threeway H14c, there is no current, and heat-exchanger pump H09 do not move, hot water side does not have current.Unique difference of the second pattern and the first pattern is, heat-exchanger pump H09 is in running status, water comes from boiler coil pipe H16, through the second water route threeway H14b, entering part heat recovering heat exchanger H02, through the first water route threeway H14a, enter boiler coil pipe H16, indicate referring to the arrow of Fig. 9.The third pattern is, triple valve H13 transfers hot water conditions to, arrow with reference to Figure 10 indicates, the first water route is open-minded, hot water is communicated with heat exchanger H07, the now shunting through threeway H14b from boiler coil pipe H16 water out, main one along journey through water route triple valve H13, water pump H10, air conditioning water heat exchanger H07, the 3rd water route threeway H14c, to the first water route threeway H14a, one is along journey process heat-exchanger pump H09, part heat recovering heat exchanger H02 in addition, to the 3rd water route threeway H14a, and main one collects and enters boiler coil pipe H16.
In preferred embodiment, heat-exchanger pump H09 is close to part heat recovering heat exchanger H02, the flow direction according to hot water in hot water circulation loop, and heat-exchanger pump H09 can be before part heat recovering heat exchanger H02, can be also after heat exchanger H02.Same, water pump of air conditioner H10 is close to air-conditioning side heat exchanger H07, ensures that the flow direction of water is conducive to heat exchange, the flow direction according to water in air conditioner water closed circuit, and water pump of air conditioner H10 can be before heat exchanger H07, can be also after heat exchanger H07.
In other embodiments, the position of water route triple valve H13 and threeway H14c can also exchange.
In preferred embodiment, hot water circulation loop, air conditioner water closed circuit can share expansion tank and moisturizing point, and in preferably implementing, expansion tank and moisturizing point are just arranged on the first connecting pipeline 11 or the second connecting pipeline on 12.Because water side subsystem only needs an expansion tank, can save installing space, and reduce costs.
As shown in Figure 10, Figure 11, in preferred embodiment of the present invention, triple valve H13 is positioned on air conditioner water pipeline, and its first mouth connects 11, the second mouths of the first connecting pipeline and connects air conditioner water backwater, before the 3rd mouth is connected on air-condition heat exchanger H07 and water pump H10; When application, first mouthful and second mouth are communicated with, or the 3rd mouth and second mouth connection.
In another embodiment, triple valve H13 is positioned on air conditioner water pipeline, and first mouthful connects 12, the second mouths of the second connecting pipeline and connect air conditioner water water outlet, after the 3rd mouth connects air-condition heat exchanger and water pump; When application, first mouthful and second mouth are communicated with, or the 3rd mouth and second mouth connection.
In other embodiments of the invention, the hot water in hot water circulation loop can be fed directly in boiler H15, and domestic hot-water passes through the heat exchanger H16 in boiler H15.The hot water inlet side of instant heating water tank H15 can be the entrance (as shown in figure 11) of heat exchanger, or the water supplement port of boiler, correspondingly, the hot water outlet side of boiler H15 can be the outlet (as shown in figure 11) of heat exchanger, or the domestic hot-water of boiler outlet.
In the aforementioned embodiment, cold-producing medium subsystem is preferably as R32 cold-producing medium, environmental protection first, and second delivery temperature is high, easily produces high-temperature-hot-water.
In the aforementioned embodiment, the preferred variable speed compressor of compressor, adjusting energy in real time.
Three alliance units of previous embodiment can provide user's heat-production functions, water heating at cold day, heat water heating function simultaneously, utilize the characteristic (delivery temperature reaches 135 degrees Celsius) of the high exhaust temperature of R32, hot water temperature can reach 85 degree, meets user hot water demand; Unit can provide user freeze, freeze recuperation of heat, single water heating function in hot day, has utilized the characteristic (delivery temperature reaches 125 degrees Celsius) of the high exhaust temperature of R32, and hot water temperature can reach 75 degree; Unit, at transition season, carries out single water heating, and hot water temperature can reach 55 degree.At cold day or transition season, adopt one day in the highest environment temperature period carry out water heating, simultaneously compressor adopts frequency reducing method, has improved efficiency, has also avoided the situation of frosting; While heating, also carry out water heating, guarantee to obtain high-temperature-hot-water; In hot day, adopt refrigeration recuperation of heat as far as possible, improve refrigerating efficiency, also obtain free hot water.Because cold-producing medium subsystem is simple, unit reliability is high, and the development cost cycle is short.
According to three kinds of patterns of two of flow of refrigerant kinds of patterns (freeze, heat) and water route operation, can be combined into five kinds of patterns of system operation, the recuperation of heat of freezing, heat, freeze, heat water heating, single water heating simultaneously.Realize when refrigeration, cold-producing medium subsystem in refrigeration mode, water side subsystem in the first pattern; Realize while heating, cold-producing medium subsystem is in heating mode, and water side subsystem is in the first pattern; While realizing refrigeration recuperation of heat, cold-producing medium subsystem is in refrigeration mode, and water side subsystem is in the second pattern; Realize while heating simultaneously water heating, cold-producing medium subsystem is in heating mode, and water side subsystem is in the second pattern; While realizing single water heating, cold-producing medium subsystem is in heating mode, and water side subsystem is in the third pattern.
As shown in figure 11, can increase a water route check valve H17 at the entrance of heat-exchanger pump H09, as can be seen from Figure, there is the 4th pattern in water side subsystem, be that water pump of air conditioner H10 operation, heat-exchanger pump H09 stop, water route triple valve H13 is in hot water conditions, unit still can normally carry out water heating or cold water like this.This has just increased a function, i.e. single chilled water, and cold-producing medium subsystem is in refrigeration mode, and water side subsystem, in four-mode, can be used for providing the water of having a shower hot day.
Figure 12 is the composition of control system in one embodiment of the invention, comprise that CPU M00, clock M01, environment temperature sniffer M02, boiler temperature detection device M03, operational mode selecting arrangement M04, the hot water scheduled time arrange that device M05, hot water minimum temperature arrange device M06, hot water demand's temperature arranges device M07, delivery temperature sniffer M08, according to the data analysis of user's input and collection, control following controll plant: compressor H01, four-way change-over valve H03, heat-exchanger pump H09, water pump of air conditioner H10, water route triple valve H13.Environment temperature is T0, and hot water temperature is THW, and clock numerical value is Time, and the hot water scheduled time is TimeS, and hot water minimum temperature settings are THWSL, and hot water demand's temperature settings are THWSR.Figure 13 is the condition that unit enters each pattern under different situations.First unit gathers ambient temperature data T0, hot water temperature's data THW, exhaust temperature data Tdis, time data Time, judge according to client's input demand model (freeze, heat, water heating), first determine whether to carry out simple water heating, in the time that hot water temperature THW sets value THWSL lower than minimum hot water temperature, unit carries out simple water heating, THWSL can be set by client, reasonably scope is 10 degrees Celsius~40 degrees Celsius, main purpose is in order to ensure basic hot water demand, client can, according to custom, arrange; When hot water temperature THW is in the time that minimum hot water temperature sets value between THWSL and hot water temperature's requirements THWSR, determine according to the pressing degree of time, if the preset distance time, unit forced to carry out simple water heating during lower than 30* (THWSR-HWT)/(THWSR-THSL) minute.Select to carry out pattern setting according to client's real needs afterwards, in the time that user selects to freeze, the recuperation of heat of preferentially freezing, only differ X1 degree Celsius (20 degrees Celsius of general values) once boiler water temperature and delivery temperature, stop heat-exchanger pump, freeze merely, reduce water pump wasted work; In the time that user selects to heat, preferentially heat water heating simultaneously, only differ X1 degree Celsius (20 degrees Celsius of general values) once boiler water temperature and delivery temperature, stop heat-exchanger pump, heat merely, reduce water pump wasted work; In the time that user selects water heating, unit carries out simple water heating; When environment temperature T0 is lower than setting value when X2, in 12 noon between at 3 in afternoon, if when unit does not have the demand of cooling and warming, unit can start and carry out water heating, utilizes the high ambient temperature at noon, and hot water preparing is saved the energy.Setting value X2 needs user to determine according to habits and customs, generally can select 15 degrees Celsius~25 degrees Celsius.
The compressor control method of simple water heating is as Figure 14, variable speed compressor reduces rotating speed and carries out work, hot water temperature is during lower than THWSL, compressor rotary speed is got high value Y2, Y2 is preferably 1/2~3/4 of compressor maximum speed, along with the rising of boiler water temperature T HW, compressor rotary speed decreases, can adopt linear reduction, also can adopt acceleration to reduce (being parabolic shape), when boiler water temperature T HW arrives THWSR, compressor rotary speed is down to Y1, Y1 is preferably 1/4~1/2 of compressor maximum speed, can realize fast like this water temperature raises, do not cause again high pressure too high, leaving water temperature also can be higher.When boiler water temperature T HW arrives THWSR+X3, single water heating pattern finishes.
The outdoor fan control method of simple water heating is as figure-15, and environment temperature T0 is during lower than X4, and unit quits work, and X4 is the operation minimum temperature of unit; Between X4 and X5 time, outdoor fan full-speed operation, rotating speed Z2, ensures frost-free; Environment temperature is in the time that X6 is above, and unit quits work, and X6 is the highest environment for use temperature of unit; Between X5 and X6 time, outdoor fan rotating speed is along with the rising rotating speed of environment temperature reduces, and minimum is Z1, for the minimum speed shelves of outdoor fan, is typically chosen in 1/3 of maximum speed.
Prior art described in embodiment shown in Fig. 8 to Figure 11 and background technology is compared as follows:
(remarks 1: adopt sensible heat heating, the temperature value that hot water can reach is lower than the delivery temperature value of compressor, and delivery temperature is higher, and hot water temperature is higher; The heating of employing condensation heat, the temperature value that can reach is lower than condensation temperature, and condensation temperature is up to 68 degrees Celsius, and condenser can not do greatly especially, has about 10 degrees Celsius of temperature difference, so, adopt the hot water temperature of condensation heat heating lower than 60 degrees Celsius)
(remarks 2: refrigerant path number is higher, are more difficult to management, and the number of path of general unit is 1)
Although the present invention with preferred embodiment openly as above, it is not for limiting the present invention, and any those skilled in the art without departing from the spirit and scope of the present invention, can make possible variation and amendment.Therefore, every content that does not depart from technical solution of the present invention, any amendment, equivalent variations and the modification above embodiment done according to technical spirit of the present invention, within all falling into the protection domain that the claims in the present invention define.

Claims (28)

1. the heat pump with hot water function, have: refrigerant side subsystem, water side subsystem, control system, refrigerant side subsystem comprises compressor, part heat recovering heat exchanger, four-way change-over valve, source heat exchanger, expansion gear, air-conditioning side heat exchanger, and refrigerant side subsystem regulates the flow direction by four-way change-over valve; It is characterized in that,
Water side subsystem comprises described part heat recovering heat exchanger, heat-exchanger pump, contains the boiler of heat exchanger, and described part heat recovering heat exchanger, heat-exchanger pump, boiler connect by hot water line, are arranged in hot water circulation loop;
Water side subsystem also comprises described air-conditioning side heat exchanger, water pump of air conditioner, and described air-conditioning side heat exchanger, water pump of air conditioner connect by air conditioner water pipeline, are arranged in air conditioner water closed circuit;
Water side subsystem also comprises the first connecting pipeline, the second connecting pipeline, and the first connecting pipeline connects the inlet side of air conditioner water pipeline and the outlet side of boiler, and the second connecting pipeline connects the outlet side of air conditioner water pipeline and the entrance side of boiler;
Water side subsystem also comprises the triple valve of the junction that is placed in air conditioner water pipeline and the first connecting pipeline or the second connecting pipeline.
2. the heat pump with hot water function as claimed in claim 1, is characterized in that, the cold-producing medium that refrigerant side subsystem adopts is R32.
3. the heat pump with hot water function as claimed in claim 1, is characterized in that, when the operation of refrigerant side subsystem, cold-producing medium only has a flow direction; Hot water circulation loop and air conditioner water closed circuit share expansion tank and moisturizing point.
4. the heat pump with hot water function as claimed in claim 1, it is characterized in that, water side subsystem also comprises heat-exchanger pump check valve, and described heat-exchanger pump uses check valve between the first connecting pipeline and part heat recovering heat exchanger or between part heat recovering heat exchanger and the second connecting pipeline.
5. the heat pump with hot water function as claimed in claim 1, it is characterized in that, described triple valve is positioned on air conditioner water pipeline, first mouth of triple valve connects the first connecting pipeline, second mouth of triple valve connects air conditioner water backwater, before the 3rd mouth of triple valve is connected on air-condition heat exchanger and water pump; First mouthful and the 3rd mouth are communicated with, or the 3rd mouth and second mouth connection.
6. the heat pump with hot water function as claimed in claim 1, it is characterized in that, triple valve is positioned on air conditioner water pipeline, and first mouth of triple valve connects the second connecting pipeline, second mouth of triple valve connects air conditioner water water outlet, after the 3rd mouth of triple valve connects air-condition heat exchanger and water pump; First mouthful and the 3rd mouth are communicated with, or the 3rd mouth and second mouth connection.
7. the heat pump with hot water function as claimed in claim 3, is characterized in that, expansion tank and moisturizing point are placed on the first connecting pipeline or on the second connecting pipeline.
8. the heat pump with hot water function as claimed in claim 1, is characterized in that, the outlet side of boiler is the outlet of heat exchanger in boiler, the entrance that the entrance side of boiler is this heat exchanger.
9. the heat pump with hot water function as claimed in claim 1, is characterized in that, the water supplement port of boiler is the entrance of heat exchanger in boiler, the outlet that domestic hot-water's outlet of boiler is this heat exchanger.
10. the heat pump with hot water function as claimed in claim 1, is characterized in that, described compressor is that the combination of variable-flow compression machine or multiple compressors is so that can realize as required energy adjustment.
11. heat pumps with hot water function as claimed in claim 1, it is characterized in that, described control system comprises that environment temperature sniffer, boiler temperature detection device, delivery temperature sniffer, clock, operational mode selecting arrangement, the hot water scheduled time arrange that device, hot water minimum temperature arrange device, hot water demand's temperature arranges device, CPU.
12. heat pumps with hot water function as claimed in claim 11, is characterized in that, described control system also comprises operational mode selecting arrangement, and operational mode selecting arrangement can provide customer selecting operational mode, comprises refrigeration, heats or force hot water.
13. 1 kinds are used in the control method of the heat pump with hot water function as claimed in claim 1, it is characterized in that comprising following control model:
A, single water heating pattern, operation compressor, use part heat recovering heat exchanger, make four-way change-over valve in heating state, make air-conditioning side heat exchanger in condensing state, make source heat exchanger in evaporating state, operation water pump of air conditioner, operation heat-exchanger pump, triple valve state is that air conditioner water closed circuit and hot water circulation loop are communicated with, air-conditioning current do not enter indoor;
B, refrigeration heat recovery mode, operation compressor, use part heat recovering heat exchanger, make four-way change-over valve in refrigerating state, air-conditioning side heat exchanger is in evaporating state, and source heat exchanger is in condensing state, operation water pump of air conditioner, operation heat-exchanger pump, triple valve state is that air conditioner water closed circuit and hot water circulation loop are disconnected, air-conditioning current can enter indoor;
C, refrigeration mode, operation compressor, do not use part heat recovering heat exchanger, make four-way change-over valve in refrigerating state, air-conditioning side heat exchanger is in evaporating state, and source heat exchanger is in condensing state, operation water pump of air conditioner, do not move heat-exchanger pump, triple valve state is that air conditioner water closed circuit and hot water circulation loop are disconnected, and air-conditioning current can enter indoor;
D, heating mode, operation compressor, do not use part heat recovering heat exchanger, make four-way change-over valve in heating state, air-conditioning side heat exchanger is in condensing state, and source heat exchanger is in evaporating state, operation water pump of air conditioner, do not move heat-exchanger pump, triple valve state is that air conditioner water closed circuit and hot water circulation loop are disconnected, and air-conditioning current can enter indoor;
E, heat simultaneously water heating pattern, operation compressor, use part heat recovering heat exchanger, make four-way change-over valve in heating state, air-conditioning side heat exchanger is in condensing state, and source heat exchanger is in evaporating state, water pump of air conditioner operation, heat-exchanger pump operation, triple valve state is that air conditioner water closed circuit and hot water circulation loop are disconnected, air-conditioning current can enter indoor.
14. control methods as claimed in claim 13, it is characterized in that, unit is preferentially produced the hot water of meeting consumers' demand, and carries out model selection according to user's cooling and warming demand simultaneously, according to user's request hot water time hot water preparing, regulate hot water to produce speed according to hot water demand's pressing degree; Wherein user can arrange minimum hot water temperature and set value THWSL, hot water demand's desired temperature THWSR, hot water demand's time, operational mode; Unit, according to input parameter, carries out model selection.
15. control methods as claimed in claim 14, is characterized in that, carry out operational mode while selecting, and when hot water temperature THW is not more than minimum hot water temperature and sets value THWSL, unit carries out single water heating pattern.
16. control methods as claimed in claim 14, is characterized in that, while carrying out operational mode selection, and when hot water temperature THW is greater than hot water temperature's requirements set value THWSR, the not single water heating of unit, unit first freezes or heats according to user's input pattern.
17. control methods as claimed in claim 16, is characterized in that, hot water temperature THW during than the low X1 of delivery temperature, opens heat-exchanger pump, the recuperation of heat or heat water heating simultaneously of freezing.
18. control methods as claimed in claim 14, it is characterized in that, while carrying out operational mode selection, if hot water temperature THW sets value THWSL higher than minimum hot water temperature and lower than hot water temperature's requirements set value THWSR, and while being less than 30* (THSWR-THW)/(THWSR-THWSL) minute the time apart from hot water demand, unit carries out single water heating mode operation.
19. control methods as claimed in claim 14, it is characterized in that, while carrying out operational mode selection, if hot water temperature THW sets value THWSL higher than minimum hot water temperature and lower than hot water temperature's requirements set value THWSR, and while being greater than 30* (THSWR-THW)/(THWSR-THWSL) minute the time apart from hot water demand, unit first freezes or heats according to user's input pattern.
20. control methods as claimed in claim 19, is characterized in that, hot water temperature THW is during than the low X1 of delivery temperature, and unit hot water water pump is opened, the recuperation of heat or heat water heating simultaneously of freezing.
21. control methods as claimed in claim 14, it is characterized in that, while carrying out operational mode selection, if hot water temperature THW sets value THWSL higher than minimum hot water temperature and lower than hot water temperature's requirements set value THWSR, and while being greater than 30* (THSWR-THW)/(THWSR-THWSL) minute the time apart from hot water demand, when user's input pattern is water heating pattern, unit carries out single water heating pattern.
22. control methods as claimed in claim 14, it is characterized in that, while carrying out operational mode selection, if hot water temperature THW sets value THWSL higher than minimum hot water temperature and lower than hot water temperature's requirements set value THWSR, and while being greater than 30* (THSWR-THW)/(THWSR-THWSL) minute the time apart from hot water demand, user is during without input pattern, and unit carries out selecting whether to carry out single water heating with the place moment according to environment temperature.
23. control methods as claimed in claim 22, is characterized in that, environment temperature is during lower than X2, and the time between 12 noon to 15, unit carries out single water heating.
24. control methods as claimed in claim 14, it is characterized in that, under described single water heating pattern, the speed of service of compressor reduces according to the rising of water temperature, in the time that water temperature sets value THWSL lower than minimum hot water temperature, compressor is with Y2 speed operation, and in water temperature, during higher than hot water demand's desired temperature THWSR, compressor moves with lowest reliable speed of service Y1.
25. control methods as claimed in claim 24, is characterized in that, Y2>3000rpm, and Y1 is 1800rpm.
26. control methods as claimed in claim 24, is characterized in that, compressor operating speed raises and is linear decline with hot water water temperature.
27. control methods as claimed in claim 14, is characterized in that, under described single water heating pattern, adopt the outer machine fan speed of service of air-source to determine according to environment temperature, rising with environment temperature reduces, in environment temperature during lower than X5, and blower fan full speed running.
28. control methods as claimed in claim 27, is characterized in that, the rotating speed of blower fan is linear decline with the rising of environment temperature.
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