CN103453679A - Household wall-mounted flat solar heat-pump water heater and control method thereof - Google Patents

Household wall-mounted flat solar heat-pump water heater and control method thereof Download PDF

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Publication number
CN103453679A
CN103453679A CN2013103583996A CN201310358399A CN103453679A CN 103453679 A CN103453679 A CN 103453679A CN 2013103583996 A CN2013103583996 A CN 2013103583996A CN 201310358399 A CN201310358399 A CN 201310358399A CN 103453679 A CN103453679 A CN 103453679A
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heat
temperature
water heater
compressor
solar
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CN2013103583996A
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Chinese (zh)
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CN103453679B (en
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蒋绿林
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常州市康舒环境科技有限公司
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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
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/20Solar thermal
    • 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]
    • Y02B30/08Energy efficient heating, ventilation or air conditioning [HVAC] relating to domestic heating, space heating, domestic hot water heating [DHW] or supply systems
    • Y02B30/12Hot water central heating systems using heat pumps
    • Y02B30/125Hot water central heating systems using heat pumps combined with the use of heat accumulated in storage masses
    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy
    • Y02E10/44Heat exchange systems

Abstract

The invention discloses a household wall-mounted flat solar heat-pump water heater and a control method thereof. The household wall-mounted flat solar heat-pump water heater comprises an outdoor unit and an indoor unit, wherein the outdoor unit comprises a tube-wing heat collecting evaporator, a solar heat-pump compressor, a thermal expansion valve, a liquid storage device, a dry filter and an electromagnetic valve, wherein the tube-wing heat collecting evaporator is formed through integrating a heat collecting plate core of a flat solar heat collecting panel and an evaporator of a heat pump; the indoor unit comprises a controller, a heat-storage water tank and a coil tube type condenser which is arranged inside the heat-storage water tank; the operation of the flat solar heat-pump water heater is realized through controlling the compressor, the thermal expansion valve and the electromagnetic valve by the controller. Through the manner, the household wall-mounted flat solar heat-pump water heater has the advantages that various complicated, changeable and harsh working conditions of a solar heat collecting evaporator are overcome successfully, heat pump technologies can be applied to solar heat utilization, the efficiency is increased greatly compared with that of a solar water heater and that of an air source heat-pump water heater, and meanwhile, the problems that the flat solar water heater needs to be protected from frostbite in winter and the air source heat-pump water heater needs to be defrosted in winter are solved.

Description

Domestic hanging plate type solar heat pump water heater and control method thereof

Technical field

The present invention relates to solar thermal utilization and heat pump system designs and manufacturing technology field, particularly relate to a kind of Domestic hanging plate type solar heat pump water heater and control method thereof.

Background technology

The unique channel that solar water heater is come into city is, as Split air source hot pump water heater is installed, the Split wall-mounted solar water heater is installed.Its concrete technology path of implementing is that solar heat-collection plate is arranged on to the outer facade (as balcony, metope, sunshade etc.) of building south orientation, heat storage water tank is arranged on indoor, and collecting plate and heat storage water tank part are arranged the thermal-arrest circulation line.

Solar heat-collection plate is arranged on facade and must and builds perfect adaptation, meet the requirement of architecture-integral, at numerous collecting plate middle plateform formula solar heat-collection plates with its distinctive advantage---daylighting area is large, bulk strength is high, can bearing operation, anticorrosive and appearance looks elegant and showing one's talent.But existing flat panel solar heat collecting plate is also because of the popularization of its intrinsic defective effect city Solar Heater Market, and these defects comprise: 1. low temperature environment and hot operation district efficiency are low; 2. the antifreeze problem of environment temperature collecting plate below 0 ℃.

Antifreeze is the problem that the plate solar collecting plate needs most solution, solving antifreeze problem the best way in prior art is to adopt anti-icing fluid as heating carrier, but anti-icing fluid can produce the cracking inefficacy through being exposed to the sun of summer high-temperature, so anti-icing fluid must be changed every year (2-3 at the most), once could fully guarantee the normal operation of system.

Air source hot pump water heater is energy-conservation and easy for installation being widely used due to it, but due to it, in environment temperature, below 0 ℃, need defrosting and low being subject to of system effectiveness to use restriction, in the northern area of China, almost can't promote the use of.

Heat pump and solar water heater are thought to combination, when solar radiation is not enough, adopt the heat pump hot water preparing, can guarantee the stable of heat supply, have again relatively high heating efficiency, energy-saving effect is remarkable.

The apparatus for heating water by solar energy that research at present is more and the combination of heat pump mainly contain direct-expansion-type and two kinds of indirect expansion types, and the heat collector of direct-expansion-type solar heat pump is directly as the evaporimeter of heat pump, and cold-producing medium directly absorbs the solar radiant energy evaporation; The heat collector of expansion type solar heat pump separates with evaporator with heat pump indirectly, the hot water that cold-producing medium obtains from heat collector, absorbs heat of vaporization.

Direct-expansion-type solar heat pump compact conformation, and due to cold-producing medium heat absorption evaporation, the heat-collecting plate core temperature is relatively not high and be evenly distributed, collecting efficiency can remain at higher level, required solar thermal collector area dwindles greatly, is the best-of-breed technology approach that realizes Domestic hanging plate type solar heat pump water heater.But the collecting efficiency of plate solar collector is subject to the impact of intensity of solar radiation and environment temperature very large, wherein the impact of intensity of solar radiation climate (as two seasons of summer in winter), environment (as fine as a nether world) and solar energy incidence angle is very large and extremely unstable, make solar thermal collector bear huge test as the evaporimeter of heat pump, the vexed solarization temperature of flat-plate solar collector is up to more than 130 ℃, it is very wide that the scope of evaporating temperature and pressure will become, and existing heat pump can't adapt to these operating modes complicated and changeable at all.

Patent " directly expanding solar heat-pump water heater " (is authorized publication number: CN2520486, application number: 01276456Y) adopt without glass cover-plate, without the bare board formula solar thermal collector of bottom insulation as evaporator with heat pump, avoided flat-plate solar collector operating mode complicated and changeable, but do not take full advantage of the high advantage of solar collector energy light energy conversion efficiency, simultaneously bare board easily is subject to environmental pollution (as the surface adhesion dust etc.), and surperficial solar energy selective coating must have high corrosion resistance and weatherability.

Patent of invention " a kind of direct expanding solar heating pump hot-water heating system " (application number: 201210157307.3) adopt bare board formula solar thermal collector and band glass solar heat collector to combine as evaporator with heat pump, control in real time collector area according to the variation of external environment by PLC and realize the relatively stable of heat pump working condition.This patent system complexity, same bare board easily is subject to environmental pollution (as surface adhesion dust etc.), and surperficial solar energy selective coating must have high corrosion resistance and weatherability.

How other direct expanding solar heating pump aspects of the prior art controls and realizes the complicated and changeable and various severe operating modes of solar heat pump if all not relating to.

Summary of the invention

The technical problem that the present invention mainly solves is to provide a kind of Domestic hanging plate type solar heat pump water heater and control method thereof, can solve:

1, Split wall-mounted flat plate solar water heater: 1. low temperature environment and hot operation district efficiency are low; 2. the problem such as antifreeze of environment temperature collecting plate below 0 ℃;

2, the low problem of air source hot pump water heater winter frost removing and system effectiveness.

3, the collecting efficiency of flat-plate solar collector is subject to the impact of intensity of solar radiation and environment temperature very large, vexed solarization temperature is especially up to more than 130 ℃, it is very wide that the scope of evaporating temperature and pressure will become, and existing direct expanding solar heating pump system can't adapt to these complicated and changeable and various severe operating modes at all.

For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of Domestic hanging plate type solar heat pump water heater is provided, comprise: off-premises station and indoor set, described off-premises station comprises the solar energy heating evaporimeter, solar energy heating evaporimeter inside is provided with tube wing type heat absorption evaporation plate core, the evaporimeter of the heat-collecting plate core of tube wing type heat absorption evaporation plate core in the flat panel solar heat collecting plate and heat pump is integrally formed, and described indoor set comprises controller, heat storage water tank and the coiled tube condenser that is arranged on heat storage water tank inside.

In a preferred embodiment of the present invention, described tube wing type heat absorption evaporation plate core top or inside are provided with evaporating heat-exchanging pipe and heat absorbing fins, connect into a whole plate by welding or expanded joint mode between heat absorbing fins and evaporating heat-exchanging pipe, the inside of evaporating heat-exchanging pipe is filled with cold-producing medium.

In a preferred embodiment of the present invention, described tube wing type heat absorption evaporation plate core adopts many evaporating heat-exchanging pipe series connection, many evaporating heat-exchanging pipe parallel connections or the many series-parallel forms of evaporating heat-exchanging pipe.

In a preferred embodiment of the present invention, described off-premises station also comprises compressor, reservoir, device for drying and filtering, magnetic valve and heating power expansion valve.

In a preferred embodiment of the present invention, described solar energy heating evaporimeter is connected with the coiled tube condenser vapour phase by compressor, and described coiled tube condenser is connected with solar energy heating evaporimeter liquid phase with heating power expansion valve by reservoir, device for drying and filtering, magnetic valve.

In a preferred embodiment of the present invention, described compressor is the solar heat pump compressor.

In a preferred embodiment of the present invention, the evaporating temperature scope of described compressor is-15 ℃-45 ℃, and the suction temperature of compressor is≤80 ℃.

In a preferred embodiment of the present invention, described controller and heat storage water tank are set to be wholely set or controller and heat storage water tank are the separate type setting.

In a preferred embodiment of the present invention, it is the separate type setting that described controller and heat storage water tank are set to one or controller and heat storage water tank.

In a preferred embodiment of the present invention, described controller comprises:

The first cooling-water temperature sensor, for detection of the water temperature of described heat storage water tank;

The second temperature sensor, for detection of the temperature of outdoor environment;

Three-temperature sensor, for detection of the temperature of described tube wing type heat absorption evaporation plate core;

The 4th temperature sensor, for detection of vaporized refrigerant temperature in the solar energy heating evaporimeter.

For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of control method of Domestic hanging plate type solar heat pump water heater is provided, comprises the steps:

Start controller, when the temperature of tube wing type heat absorption evaporation plate core, during higher than environment temperature, open magnetic valve delayed start-up compressor;

When the temperature difference that the temperature of tube wing type heat absorption evaporation plate core is set lower than environment temperature, close compressor, and shut electromagnetic valve simultaneously;

When the water temperature of heat storage water tank reaches design temperature, shut electromagnetic valve time-delay closing compressor.

The invention has the beneficial effects as follows:

The evaporimeter of the heat-collecting plate core in the flat panel solar heat collecting plate and heat pump is made to integrally formed tube wing type thermal-arrest evaporimeter, evaporation and heat-exchange is even, whole heat-collecting plate core surface temperature is even, greatly reduce the surface heat migration loss, liquid-gas phase transition heat transfer simultaneously is tens times of heat convection, with respect to solar water heating system efficiency, greatly improve, thoroughly solved the antifreeze problem of flat-plate solar collector simultaneously, guarantee that by control thermal-arrest evaporator evaporation temperature can be not too low, overcome the problem of air source hot pump water heater winter frost removing and inefficiency, realize the high efficiency of solar energy heat pump system, by controller, realize compressor, the control of heating power expansion valve and magnetic valve, complicated and changeable and the various severe operating modes of solar energy heating evaporimeter have been overcome, realized that heat pump techniques is in the application of solar thermal utilization.

The accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings, wherein:

Fig. 1 is the structural representation of Domestic hanging plate type solar heat pump water heater of the present invention one preferred embodiment;

Fig. 2 is the structural representation of a preferred embodiment of tube wing type thermal-arrest evaporimeter of the present invention;

Fig. 3 is that the A-A of Fig. 2 is to view;

In accompanying drawing, the mark of each parts is as follows: 1, solar energy heating evaporimeter, 2, tube wing type heat absorption evaporation plate core, 3, compressor, 4, controller, 5, heat storage water tank, 6, coiled tube condenser, 7, reservoir, 8, device for drying and filtering, 9, magnetic valve, 10, heating power expansion valve, 11, evaporating heat-exchanging pipe, 12, heat absorbing fins, 13, frame, 14, insulating, 15, transparent cover plate, 16, backboard.

The specific embodiment

Below will the technical scheme in the embodiment of the present invention be clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making all other embodiment that obtain under the creative work prerequisite, belong to the scope of protection of the invention.

Refer to Fig. 1 to Fig. 3, the embodiment of the present invention comprises:

A kind of Domestic hanging plate type solar heat pump water heater, comprise: off-premises station and indoor set, described off-premises station comprises solar energy heating evaporimeter 1, solar energy heating evaporimeter 1 inside is provided with tube wing type heat absorption evaporation plate core 2, the heat-collecting plate core of tube wing type heat absorption evaporation plate core 2 in the flat panel solar heat collecting plate is integrally formed with the evaporimeter of heat pump, described indoor set comprise store up controller 4, heat storage water tank 5 and be arranged on heat storage water tank 5 inside by coiled tube condenser 6.

Described off-premises station also comprises compressor 3, reservoir 7, device for drying and filtering 8, magnetic valve 9 and heating power expansion valve 10, described solar energy heating evaporimeter 1 is connected with coiled tube condenser 6 vapour phases by compressor 3, and described coiled tube condenser 6 is connected with solar energy heating evaporimeter 1 liquid phase with heating power expansion valve 10 by reservoir 7, device for drying and filtering 8, magnetic valve 9.

In the present invention, adopt heat pump techniques to be applied in the solar thermal utilization aspect, be specially the integrally formed tube wing type heat absorption of the evaporimeter of the heat-collecting plate core of flat panel solar heat collecting plate and heat pump evaporation plate core 2, the condenser of heat pump is made to coiled tube condenser 6 and be placed in the inside of heat storage water tank 5, be arranged on balcony or indoor.

Wherein, coiled tube condenser 6 can not be arranged on heat storage water tank 5 inside, by the condenser secondary heat exchange is set independently or by coiled tube condenser 6 on the inner bladder outer wall of heat storage water tank 5.

Described tube wing type heat absorption evaporation plate core 2 tops or inside are provided with evaporating heat-exchanging pipe 11 and heat absorbing fins 12, between heat absorbing fins 12 and evaporating heat-exchanging pipe 11, by welding or expanded joint mode, connect into a whole plate, and the inside of evaporating heat-exchanging pipe 11 is filled with cold-producing medium.

Described tube wing type heat absorption evaporation plate core 2 adopts 11 series connection of many evaporating heat-exchanging pipes, many evaporating heat-exchanging pipe 11 parallel connection or the many series-parallel forms of evaporating heat-exchanging pipe 11.

Described solar energy heating evaporimeter 1 comprises tube wing type heat absorption evaporation plate core 2, frame 13, thermal insulation separation thermosphere 14, transparent cover plate 15 and backboard 16, as shown in Figure 2.

Wherein, the top of described tube wing type heat absorption evaporation plate core 2 is equipped with transparent cover plate 15, the back of tube wing type heat absorption evaporation plate core 2 is equipped with backboard 16, frame 13 is arranged on the surrounding of solar energy heating evaporimeter 1, and the backboard 16 of solar energy heating evaporimeter 1 and tube wing type absorb heat between evaporation plate core 2 and surrounding is provided with thermal insulation separation thermosphere 14.

Thermal insulation separation thermosphere 14 has adopted polyurethane foam or mineral wool, has stopped heat bridge, reduces heat waste, has greatly improved the heat collector collecting efficiency.

Described transparent cover plate 15 adopts low iron, woven design, safety glass, and high transmission rate and woven design diffuse reflection make between tube wing type heat absorption evaporation plate core 2 and glass inner chamber and form greenhouse effects, and tempering makes intensity higher, not easy damaged.

The top of described tube wing type heat absorption evaporation plate core 2 or the inner evaporating heat-exchanging pipe 11 and heat absorbing fins 12 linked into an integrated entity that be provided with, the surface of heat absorbing fins 12 adopts magnetron sputtering titanium oxynitrides or electroplating black chromium solar coating for selective absorption, heat absorption rate reaches 95% ± 2%, emissivity is lower than 8%, stable performance.

Be interconnected to a whole plate between described heat absorbing fins 12, evaporating heat-exchanging pipe 11 is connected by welding or expanded joint mode with heat absorbing fins 12.

Described evaporating heat-exchanging pipe 11 adopts the metals such as copper, alloy aluminum to make, form described tube wing type heat absorption evaporation plate core 2 by 11 series connection of many evaporating heat-exchanging pipes, perhaps adopt the form of many evaporating heat-exchanging pipes 11 parallel connections, or adopt the series-parallel form of many evaporating heat-exchanging pipes 11.

The working medium of described heat pump inside adopts refrigerant R134a, vacuumizes injection.

Before the solar heat pump startup, solar energy heating evaporimeter 1 inner flow passage is full of refrigerant vapour, at this moment the temperature of evaporimeter inner refrigerant steam equates with environment temperature, along with tube wing type heat absorption evaporation plate core 2 absorbs solar radiation energy, the heat-absorbing plate core temperature rises, when the heat-absorbing plate core temperature rises to higher during to certain value than environment temperature, open magnetic valve 9, refrigerant liquid in reservoir 7 enters into the runner of tube wing type thermal-arrest evaporimeter 1 inside by heating power expansion valve 10, start vaporizer also absorbs heat, and temperature and pressure starts to descend.

After time delay a period of time, start compressor 3, low-temperature low-pressure refrigerant steam in solar energy heating evaporimeter 1 enters compressor 3, the cold water of compressed machine 3 actings in the refrigerant vapour of compressor 3 outlet discharge HTHPs enters the coiled tube condenser 6 condensation heat releases in being arranged on heat storage water tank 5 and heats heat storage water tank 5, condensate liquid enters reservoir 7, absorb evaporation enter evaporimeter by heating power expansion valve 10 step-down coolings under the effect of height pressure reduction in, thereby form a heat pump working cycles.

Along with heat storage water tank 5 inner cold water temperature improve constantly, the pressure at expulsion of compressor 3 and delivery temperature and the interior condensing pressure of coiled tube condenser 6 and condensation temperature also constantly raise, to adapt to dynamics and thermodynamical equilibrium under new operating mode, until the water temp. heating in heat storage water tank 5 is to when setting value, close battery valve 9, stop feed flow, in solar energy heating evaporimeter 1, residual liquid working medium can continue evaporation, until all dry up and form superheated steam, compressor 3 time delay certain hours are out of service.

In the present invention, be full of cold-producing medium (R134a) in described evaporating heat-exchanging pipe 11, be the moving state of stream-liquid two-phase flow, form the dry type evaporation, have the following advantages:

1. original convective heat transfer liquid mode is changed over to the phase-change heat-exchange mode, greatly reduce heat waste, improved heat transference efficiency, make plate solar collector just can keep high collecting efficiency at low-temperature space;

2. cold-producing medium is at evaporating heat-exchanging pipe 11 flow evaporations, and evenly fully, whole heat-collecting plate core surface temperature is even, greatly reduces surface heat and migrates loss in evaporation;

3. adopt the working media of refrigerant R134a as heat pump, in the normal working temperature scope, system, all the time in operation under positive pressure, avoids conventional heat-tube vacuum to move many adverse effects of bringing;

4. in the normal working temperature scope, working media, without freezing point, thoroughly solves antifreeze problem.

Above-mentioned some realized that heat pump techniques is applied to the efficient and stable operation of solar water heating system.

Described compressor 3 is arranged on the outlet of solar energy heating evaporimeter 1, compressor 3 adopts follow-on solar heat pump dedicated compressor, characteristics with evaporating temperature wide ranges (ceiling temperature reaches 45 ℃), suction temperature high (ceiling temperature reaches 80 ℃), be applicable to the complicated and changeable and various severe operating modes of solar heat pump.Coiled tube condenser 6 is arranged in heat storage water tank 5, directly heats the cold water in heat storage water tank 5, with respect to the condenser separated with heat storage water tank 5, has save the heating water circulating pump, has avoided secondary heat exchange, and heat exchange efficiency is high.

In the outlet of coiled tube condenser 6, reservoir 7, device for drying and filtering 8, magnetic valve 9 and heating power expansion valve 10 have been installed, when heat storage water tank 5 water temperatures reach design temperature, at first shut electromagnetic valve 9, close compressor 3 after time delay a period of time, can effectively avoid like this solar energy heating evaporimeter 1 too high pressure to occur, if do not stop the feed flow to solar energy heating evaporimeter 1, in sun-drenched situation, can make the whole system hypertonia.

Controller 4 is arranged on indoor, can be arranged on heat storage water tank 5 and be made of one with water tank, also can separate with heat storage water tank 5.Controller 4 arranges No. four temperature sensors: the first cooling-water temperature sensor, for detection of the water temperature of described heat storage water tank 5; The second temperature sensor, for detection of the temperature of surrounding environment; Three-temperature sensor, for detection of the temperature of described tube wing type heat absorption evaporation plate core 2; The 4th temperature sensor, for detection of vaporized refrigerant temperature in solar energy heating evaporimeter 1.

Controller 4 is three control output ends, tunnel (comprising the control output end that connects respectively compressor 3, auxiliary thermal source and magnetic valve 9) also, and a road connects the control output end (for the high-low pressure protection etc.) of external alarm signal.Major function has:

1. temperature shows and controls: can show Water in Water Tank benign environment temperature, and within water tank temperature being controlled to the bound of design temperature;

2. the control of auxiliary electrical heater: controller has " automatically " and " economy " two kinds of operational modes, under " economy " pattern, does not electrically heatedly start;

3. delivery temperature protection: when excessive discharge temperature, stop unit operation and produce alarm signal;

4. external alarm function: a road external switch amount alarm signal input, can be arranged to often open, normally closed or forbidding, automatically restoring fault number of times and time can be set;

5. regularly section operation: there is regularly section operation function;

6. other: real-time clock (RTC), power-failure memory on-off state (can arrange), compressor 3 start delay protections, temperature sensor fault warning, fluoridize, test etc.

The operation principle of Domestic hanging plate type solar heat pump water heater of the present invention is:

Sunlight sees through transparent cover plate 15 and shines on tube wing type heat absorption evaporation plate core 2, now on heat absorbing fins 12, solar selectively absorbing coating absorbs solar radiant energy and is converted to heat energy, transfer heat to the cold-producing medium working medium of evaporating heat-exchanging pipe 11 inside simultaneously, make it to become steam state by the liquid state heat absorption, under the effect of solar energy heating evaporimeter 1 import department's heating power expansion valve 10, vaporized refrigerant keeps certain degree of superheat to enter compressor 3, through compressor 3 compressions, form high-temperature high-pressure refrigerant steam, enter the coiled tube condenser 6 be arranged in heat storage water tank 5, be condensed into liquid state by the steam state heat release, cold water in cold-producing medium working medium condensation liberated heat heating heat storage water tank 5, liquid refrigerant working medium is passed through under pressure through reservoir 7, device for drying and filtering 8, magnetic valve 9 enters heating power expansion valve 10 throttling expansions, the step-down cooling enters solar energy heating evaporimeter 1, again absorb the solar energy of changing from tube wing type heat absorption evaporation plate core 2 and enter next heat transmission circulation.

The start and stop of system are realized by controller 4, when tube wing type heat absorption evaporation plate core 2 temperature are set the temperature difference higher than environment temperature, show that the solar energy irradiation intensity has reached certain value, open magnetic valve 9 delayed start-up compressor 3, and system starts.

When the water temperature of heat storage water tank 5 reaches set water temperature, shut electromagnetic valve 9 time-delay closing compressor 3; When perhaps tube wing type heat absorption evaporation plate core 2 temperature are set the temperature difference and tube wing type heat absorption evaporation plate core 2 temperature lower than setting value lower than environment temperature, close compressor 3, shut electromagnetic valve 9. simultaneously

Below set forth several special operating conditions:

Operating mode one: a nether world is fine.

When the fine climate condition in the nether world between occurring, solar radiation intensity there will be very large fluctuation, and when selecting invariable frequency compressor, the evaporating temperature of solar energy heating evaporimeter 1 is along with very great fluctuation process occurring, especially in winter, evaporating temperature there will be the situation lower than the working conditions of compressor scope; Evaporating temperature is lower than 0 ℃ in addition, and system energy efficiency is just lower, the phenomenon of frosting may occur on glass cover-plate 15 surfaces of solar energy heating evaporimeter 1, is unfavorable for system stable operation simultaneously.

For this operating mode, the present invention adopts control tube wing type heat absorption evaporation plate core 2 temperature to realize that system stability efficiently moves.When tube wing type heat absorption evaporation plate core 2 temperature are set the temperature difference higher than environment temperature, show that the solar energy irradiation intensity has reached certain value, open magnetic valve 9 delayed start-up compressor 3, system starts.When heat storage water tank 5 water temperatures reach set water temperature, shut electromagnetic valve 9 time-delay closing compressor 3; When perhaps tube wing type heat absorption evaporation plate core 2 temperature are set the temperature difference (at this moment the solar energy irradiation intensity is lower than certain value) and tube wing type heat absorption evaporation plate core 2 temperature lower than setting value lower than environment temperature, close compressor 3, shut electromagnetic valve 9 simultaneously.Reach certain value when the solar energy irradiation intensity raises again, when the evaporation plate of tube wing type heat absorption simultaneously core 2 temperature are set the temperature difference higher than environment temperature, again started compressor 3, completed the heating to cold water in heat storage water tank 5.

Operating mode two: heat storage water tank 5 has reached set water temperature, and the solar energy irradiation intensity is still very strong.

This operating mode often can be encountered in summer; if do not stop the feed flow to solar energy heating evaporimeter 1, in sun-drenched situation, can make solar energy heating evaporimeter 1 too high evaporating temperature and evaporating pressure occur; the whole system hypertonia, be unfavorable for design and the operation steady in a long-term of system.

This time, system is controlled and is adopted shut electromagnetic valve 9 time-delay closing compressor 3, shut electromagnetic valve 9 stops to solar energy heating evaporimeter 1 feed flow, time-delay closing compressor 3, residual refrigerant liquid evacuator body in solar energy heating evaporimeter 1 is siphoned away, make at the interior formation superheated steam of solar energy heating evaporimeter 1, make the whole system pressure decreased.

The beneficial effect of Domestic hanging plate type solar heat pump water heater of the present invention and control method thereof is:

One, the evaporimeter of the heat-collecting plate core in the flat panel solar heat collecting plate and heat pump is made to integrally formed tube wing type heat absorption evaporation plate core 2, evaporation and heat-exchange is even, whole heat-collecting plate core surface temperature is even, greatly reduce the surface heat migration loss, liquid-gas phase transition heat transfer simultaneously is tens times of heat convection, with respect to solar water heating system efficiency, greatly improves;

Two, owing to adopting solar energy heating evaporimeter 1, the cold-producing medium evaporating temperature is high than the evaporation of the air source heat pump at equivalent environment temperature temperature, so solar energy heat pump system COP value is high than air source heat pump system COP value;

Three, adopt cold-producing medium (R134a etc.) as the heat pump working solution, the freezing point temperature of R134a is-103 ℃, has thoroughly solved the antifreeze problem of flat-plate solar collector;

Four, the solar energy heating evaporimeter 1 of solar energy is in low temperature (approaching environment temperature) operation all the time, and the solar energy thermal efficiency is up to more than 75%, and the thermal efficiency of more conventional solar thermal collector 40%-45% improves greatly;

Five, improve the operating mode of compressor 3, the evaporating temperature of compressor 3 and the suction temperature upper limit have been become to large, adapted to the excursion of direct expanding solar heating pump evaporating temperature and suction temperature;

Six, improve heating power expansion valve 10, the unlatching scope of heating power expansion valve 10 has been become to large, adapted to the variation of direct expanding solar heating pump refrigerant flow;

Seven, between heating power expansion valve 10 and reservoir 7, magnetic valve 9 is set, protection flat panel solar heat collecting evaporimeter 1 does not move under super-pressure;

Eight, by controlling the start and stop of compressor 3, guarantee that thermal-arrest evaporator evaporation temperature can be not too low, realize the high efficiency of solar energy heat pump system.

The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention to do; or directly or indirectly be used in other relevant technical field, all in like manner be included in scope of patent protection of the present invention.

Claims (10)

1. a Domestic hanging plate type solar heat pump water heater, it is characterized in that, comprise: off-premises station and indoor set, described off-premises station comprises the solar energy heating evaporimeter, solar energy heating evaporimeter inside is provided with tube wing type heat absorption evaporation plate core, the evaporimeter of the heat-collecting plate core of tube wing type heat absorption evaporation plate core in the flat panel solar heat collecting plate and heat pump is integrally formed, and described indoor set comprises controller, heat storage water tank and the coiled tube condenser that is arranged on heat storage water tank inside.
2. Domestic hanging plate type solar heat pump water heater according to claim 1, it is characterized in that, described tube wing type heat absorption evaporation plate core top or inside are provided with evaporating heat-exchanging pipe and heat absorbing fins, connect into a whole plate by welding or expanded joint mode between heat absorbing fins and evaporating heat-exchanging pipe, the inside of evaporating heat-exchanging pipe is filled with cold-producing medium.
3. Domestic hanging plate type solar heat pump water heater according to claim 2, is characterized in that, described tube wing type heat absorption evaporation plate core adopts many evaporating heat-exchanging pipe series connection, many evaporating heat-exchanging pipe parallel connections or the many series-parallel forms of evaporating heat-exchanging pipe.
4. Domestic hanging plate type solar heat pump water heater according to claim 1, is characterized in that, described off-premises station also comprises compressor, reservoir, device for drying and filtering, magnetic valve and heating power expansion valve.
5. Domestic hanging plate type solar heat pump water heater according to claim 4, it is characterized in that, described solar energy heating evaporimeter is connected with the coiled tube condenser vapour phase by compressor, and described coiled tube condenser is connected with solar energy heating evaporimeter liquid phase with heating power expansion valve by reservoir, device for drying and filtering, magnetic valve.
6. Domestic hanging plate type solar heat pump water heater according to claim 4, is characterized in that, described compressor is the solar heat pump compressor.
7. Domestic hanging plate type solar heat pump water heater according to claim 4, is characterized in that, the evaporating temperature scope of described compressor is-15 ℃-45 ℃, and the suction temperature of compressor is≤80 ℃.
8. Domestic hanging plate type solar heat pump water heater according to claim 1, is characterized in that, described controller and heat storage water tank are set to be wholely set or controller and heat storage water tank are the separate type setting.
9. Domestic hanging plate type solar heat pump water heater according to claim 8, is characterized in that, described controller comprises:
The first cooling-water temperature sensor, for detection of the water temperature of described heat storage water tank;
The second temperature sensor, for detection of the temperature of outdoor environment;
Three-temperature sensor, for detection of the temperature of described tube wing type heat absorption evaporation plate core;
The 4th temperature sensor, for detection of vaporized refrigerant temperature in the solar energy heating evaporimeter.
10. the control method of a Domestic hanging plate type solar heat pump water heater, is characterized in that, comprises the steps:
Start controller, when the temperature of tube wing type heat absorption evaporation plate core, during higher than environment temperature, open magnetic valve delayed start-up compressor;
When the temperature difference that the temperature of tube wing type heat absorption evaporation plate core is set lower than environment temperature, close compressor, and shut electromagnetic valve simultaneously;
When the water temperature of heat storage water tank reaches design temperature, shut electromagnetic valve time-delay closing compressor.
CN201310358399.6A 2013-08-15 2013-08-15 The control method of household wall-mounted flat solar heat-pump water heater CN103453679B (en)

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