CN112325505B - Outdoor defrosting device driven and controlled by multi-dimensional heat source and control method thereof - Google Patents
Outdoor defrosting device driven and controlled by multi-dimensional heat source and control method thereof Download PDFInfo
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- CN112325505B CN112325505B CN202011241132.5A CN202011241132A CN112325505B CN 112325505 B CN112325505 B CN 112325505B CN 202011241132 A CN202011241132 A CN 202011241132A CN 112325505 B CN112325505 B CN 112325505B
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- heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
- F24D15/04—Other domestic- or space-heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
Abstract
The invention discloses an outdoor defrosting device driven and controlled by a multidimensional heat source and a control method thereof, and relates to the technical field of heat pump defrosting. In the invention: a four-way reversing valve is arranged between the outdoor heat exchanger and the indoor heat exchanger, the outdoor heat exchanger is connected with the compressor through the four-way reversing valve, and the indoor heat exchanger is connected with the compressor through the four-way reversing valve. During defrosting, the outdoor heat exchanger is switched from an evaporation mode to a condensation mode, and the indoor heat exchanger is switched from the condensation mode to the evaporation mode; the compressor, the electric heating equipment and the outdoor fan are stopped, the four-way reversing valve reverses, after a refrigerant medium is relatively stable, the compressor and the electric heating equipment are restarted, and the defrosting operation of the outdoor heat exchanger is carried out along with the absorption of solar radiation energy into the outdoor heat exchanger during solar irradiation. The invention carries out the defrosting operation of the outdoor evaporator which is rapid and does not influence the indoor thermal comfort by comprehensively utilizing the solar energy, the air energy, the compression pump, the electric heating and the heat accumulation in the floor heating.
Description
Technical Field
The invention belongs to the technical field of heat pump defrosting, and particularly relates to an outdoor defrosting device driven and controlled by a multidimensional heat source and a control method thereof.
Background
The clean and renewable unlimited resource which can be utilized by human beings during solar energy is also a matter of great significance when heating is carried out in cold winter, particularly in northern areas, the clean heating rate of the northern areas reaches 70 percent, and in the implementation process of a clean energy heating policy, the air source heat pump is slowly the first-choice electric heating equipment due to the characteristics of small occupied area, convenience in installation, no need of replacing the original indoor heat supply tail end, high annual utilization rate and the like.
Although the air source heat pump has been developed and applied for more than ten years, the low temperature applicability and the frosting of the outdoor unit evaporator are still the problems of the air source heat pump in winter. The low-temperature applicability means that the low-temperature applicability is that the low-temperature applicability cannot be operated or the performance coefficient is low when the low-temperature applicability is operated in severe cold and cold regions; the frosting of the outdoor unit evaporator means that a thick frost layer is formed on the outer surface of the evaporator in an area with moderate temperature and high humidity. The frost layer can cause the heat conduction resistance of the surface of the evaporator to increase, and the frost layer is continuously thickened along with the melting, freezing, re-melting and re-freezing processes of the frost layer, so that the heat transfer coefficient of the heat exchanger can be influenced. On the other hand, the outdoor evaporator of the conventional air source heat pump is a tube fin heat exchange unit, in order to increase the heat exchange area, a smaller fin pitch is adopted, and frost layers are formed in gaps of the frost layers and can seriously block air circulation, so that the heat transfer coefficient of the heat exchanger can be influenced.
Disclosure of Invention
The invention aims to provide an outdoor defrosting device driven and controlled by a multidimensional heat source and a control method thereof, which can carry out defrosting operation of an outdoor evaporator quickly without influencing indoor thermal comfort by comprehensively utilizing solar energy, air energy, a compression pump, electric heating and heat storage in floor heating.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to an outdoor defrosting device driven and controlled by a multidimensional heat source, which comprises an outdoor heat exchanger and an indoor heat exchanger, wherein a four-way reversing valve is arranged between the outdoor heat exchanger and the indoor heat exchanger, a compressor is connected to the four-way reversing valve, the outdoor heat exchanger is connected with the compressor through the four-way reversing valve, and the indoor heat exchanger is connected with the compressor through the four-way reversing valve.
The outdoor heat exchanger and the indoor heat exchanger are both provided with electric heating equipment, and the electric heating equipment is in electric signal connection with the corresponding electric heating controller; outdoor fan, air can equipment are installed in the outdoor heat exchanger cooperation, and air can the heat transfer to the outdoor heat exchanger in with the air in the outdoor fan in the equipment of air ability.
As a preferred technical scheme of the invention, the periphery of the outdoor heat exchanger is provided with a transparent protective shell; the outdoor heat exchanger is coated with a solar energy absorbing coating.
As a preferred technical scheme of the invention, the outdoor heat exchanger and the indoor heat exchanger are heat exchange mechanisms for controlling and switching evaporation and condensation.
As a preferred technical scheme of the invention, an electronic expansion valve is arranged on a pipeline between the outdoor heat exchanger and the indoor heat exchanger.
A multi-dimensional heat source drive control outdoor defrosting control method comprises a heat input part and a heat regulation part, and specifically comprises the following steps:
the heat input part comprises external energy radiation intake and auxiliary energy intake;
(1) external energy radiation intake:
solar radiation intake: the solar energy absorption coating on the outdoor heat exchanger absorbs the solar energy radiation energy and provides the solar energy radiation energy for the outdoor heat exchanger; air energy radiation intake: the outdoor fan leads in air with the air can equipment, and air can equipment exports corresponding air ability heat to outdoor heat exchanger.
(2) Auxiliary energy intake:
the supercooling quantity of the filling layer of the indoor geothermal floor transfers part of heat storage quantity to an indoor heat exchanger on the premise of not influencing the indoor heating effect; and secondly, driving and controlling the electric heating equipment by the electric heating controller, and providing auxiliary heat for the outdoor heat exchanger and the indoor heat exchanger by the electric heating equipment.
The heat regulation and control part comprises a heating working condition and a defrosting working condition:
(1) heating condition:
when the sun exists in sunny days, the outdoor fan is started, the outdoor heat exchanger takes in heat comprising solar energy and air energy, the heat is conveyed to the compressor through the refrigerant along with electric auxiliary heat regulation and control of the electric heating equipment, and indoor heating is achieved; when the sun is absent in the daytime, the outdoor fan is started, the outdoor heat exchanger absorbs heat of air energy, the heat is conveyed to the compressor through the refrigerant along with electric auxiliary heat regulation and control of the electric heating equipment, and indoor heating is achieved.
(2) Defrosting condition:
firstly, the control system detects a frosting sensing signal and enters a defrosting working condition; the outdoor heat exchanger is switched from an evaporation mode to a condensation mode, and the indoor heat exchanger is switched from the condensation mode to the evaporation mode; the compressor, the electric heating equipment and the outdoor fan are stopped, the four-way reversing valve reverses, after a certain time, the refrigerant medium is relatively stable, the compressor and the electric heating equipment are restarted, and the defrosting operation of the outdoor heat exchanger is carried out along with the absorption of solar radiation energy into the outdoor heat exchanger during solar irradiation; after defrosting is finished, the compressor and the electric heating equipment are closed, the outdoor heat exchanger is switched to the evaporation mode from the condensation mode, the indoor heat exchanger is switched to the condensation mode from the evaporation mode, the four-way reversing valve is used for reversing, and after a certain time, the compressor, the electric heating equipment and the outdoor fan are restarted after the refrigerant medium is relatively stable.
As a preferred technical scheme of the invention, the electric heating equipment is arranged at the position of a condensation outlet of the outdoor heat exchanger and an evaporation inlet of the indoor heat exchanger in the situation of heating working conditions; the electric heating device adopts a pipeline type electric heating mechanism.
As a preferred technical scheme of the invention, in the defrosting working condition process, the outdoor fan keeps a closed state, and after defrosting is finished, the four-way reversing valve is reversed to drive the outdoor fan to start.
The invention has the following beneficial effects:
1. the invention comprehensively absorbs and utilizes solar energy by utilizing the solar energy and air energy evaporators, plays a role in inhibiting the formation of a frost layer under the condition of solar irradiance, and carries out quick defrosting operation without influencing indoor thermal comfort by utilizing reverse defrosting, electric defrosting and heat storage in floor heating under the condition of no solar irradiation;
2. the solar energy and air energy can be absorbed simultaneously through the refrigerant, the energy utilization rate can be improved, the heating performance of the whole system can be improved, and the surface temperature of the evaporator can be effectively improved and frost formation can be inhibited by adopting the solar coating;
3. the system defrosting method can reduce the influence of the coupling system on indoor thermal comfort under the defrosting working condition, and simultaneously realizes the energy conservation of buildings and the utilization of clean energy to a certain extent.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the relationship of an outdoor defrosting device driven and controlled by a multi-dimensional heat source according to the present invention;
FIG. 2 is a flow chart of heating/defrosting with solar radiation illumination according to the present invention;
FIG. 3 is a flow chart of heating/defrosting without solar irradiance in the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-an outdoor heat exchanger; a 2-four-way reversing valve; 3-a compressor; 4-indoor heat exchanger; 5-an electric heating controller; 6-electric heating equipment; 7-outdoor fan; 8-air energy equipment; 9-solar energy absorbing coating.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 2, fig. 2 is a flow chart of heating/defrosting operation with solar radiation illumination.
Fig. 2 shows the flow direction of the refrigerant under the defrosting condition, the control logic under the defrosting condition, and the flow direction of the refrigerant under the heating condition, and the control logic under the heating condition.
When there is radiant illumination in sunny days, under the heating working condition, the outdoor fan is started, the energy intake of the outdoor heat exchanger, namely the evaporator, comprises solar energy and air energy, and the solar energy and the air energy are conveyed to the compressor through the heat of the refrigerant. In other words, the heat obtained by the indoor heat exchanger, i.e., the condenser, includes compressor power, solar power, and air power.
Under the defrosting condition, the evaporator and the condenser exchange the indoor and outdoor positions, and the system is changed from the heating condition to the defrosting condition. Along with the transmission of a frosting sensing signal, the system starts to enter a defrosting working condition, firstly, the compressor and the fan stop, then, the four-way reversing valve is opened for reversing, and after the system waits for the relative stability of a refrigerant medium, the compressor and the electric heating equipment are started in a communicating manner; the outdoor fan is still closed until the frost layer is removed, and the compressor and the electric heating equipment are closed simultaneously;
and then reversing the four-way reversing valve, starting the outdoor fan, starting the compressor, and recovering the heating working condition of the system. In the whole defrosting operation process, the energy sources of the outdoor heat exchanger under the defrosting working condition comprise the excessive cooling capacity of the floor filling layer, the heating capacity of the electric heating equipment, the solar energy and the heating capacity of the compressor. In the invention, the solar energy is utilized without a complex control system, and in addition, the solar energy can be utilized by adding the solar coating, and the solar energy utilization device has the characteristics of excellent effective energy, convenient modification and high reliability.
Example two
Referring to fig. 3, fig. 3 is a flow chart of heating/defrosting without solar radiation illumination.
Fig. 3 shows the flow direction of the refrigerant under the defrosting condition, the control logic under the defrosting condition, and the flow direction of the refrigerant under the heating condition, and the control logic under the heating condition.
Under the heating working condition, the outdoor fan is started, the outdoor heat exchanger, namely the energy intake of the evaporator, is air energy, and the air energy is conveyed to the compressor through the heat of the refrigerant. The heat obtained by the indoor heat exchanger, i.e., the condenser, includes compressor power and air power, among other things.
Under the defrosting condition, the evaporator and the condenser exchange the indoor and outdoor positions, and the system is changed from the heating condition to the defrosting condition. And (3) along with the transmission of a defrosting sensing signal, the system starts to enter a defrosting working condition, firstly, the compressor and the outdoor fan stop, then, the four-way reversing valve is opened for reversing, and after the system waits for the relative stability of a refrigerant medium, the compressor and the electric heating equipment are started in a communicating manner. The outdoor fan is still closed until the frost layer is removed, and the compressor and the electric heating equipment are closed simultaneously; and then reversing the four-way reversing valve, starting the outdoor fan, starting the compressor, and recovering the heating working condition of the system. In the whole defrosting operation process, the energy sources of the outdoor heat exchanger, namely the condenser under the defrosting condition, comprise the excessive cooling capacity of the floor filling layer, the heating capacity of the electric heating equipment and the heating capacity of the compressor.
In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (2)
1. The utility model provides a control method of multidimension degree heat source drive control's outdoor defroster, multidimension degree heat source drive control's outdoor defroster includes outdoor heat exchanger (1) and indoor heat exchanger (4), be provided with four-way reversing valve (2) between outdoor heat exchanger (1) and indoor heat exchanger (4), be connected with compressor (3) on four-way reversing valve (2), outdoor heat exchanger (1) links to each other with compressor (3) through four-way reversing valve (2), indoor heat exchanger (4) link to each other with compressor (3) through four-way reversing valve (2), its characterized in that:
electric heating equipment (5) is arranged on both the outdoor heat exchanger (1) and the indoor heat exchanger (4), and the electric heating equipment (5) is in electric signal connection with a corresponding electric heating controller (6);
the outdoor heat exchanger (1) is provided with an outdoor fan (7) and air energy equipment (8) in a matching manner, and the air energy equipment (8) transfers the heat of the air energy in the outdoor fan (7) to the outdoor heat exchanger (1);
a transparent protective shell is arranged on the periphery of the outdoor heat exchanger (1);
the outdoor heat exchanger (1) is coated with a solar energy absorption coating (9);
the outdoor heat exchanger (1) and the indoor heat exchanger (4) are heat exchange mechanisms for controlling and switching evaporation and condensation;
an electronic expansion valve is arranged on a pipeline between the outdoor heat exchanger (1) and the indoor heat exchanger (4);
the control method of the outdoor defrosting device driven and controlled by the multi-dimensional heat source comprises a heat input part and a heat regulation part;
the heat input part comprises external energy radiation intake and auxiliary energy intake;
(1) external energy radiation intake:
solar radiation intake: the solar energy absorption coating (9) on the outdoor heat exchanger (1) absorbs solar energy radiation energy and provides the solar energy radiation energy for the outdoor heat exchanger (1);
air energy radiation intake: the outdoor fan (7) guides air into the air energy equipment (8), and the air energy equipment (8) outputs corresponding air energy heat to the outdoor heat exchanger (1);
(2) auxiliary energy intake:
the supercooling quantity of the filling layer of the indoor geothermal floor transfers part of the heat storage quantity to an indoor heat exchanger (4) on the premise of not influencing the indoor heating effect;
driving and controlling the electric heating equipment (5) by the electric heating controller, and providing auxiliary heat for the outdoor heat exchanger (1) and the indoor heat exchanger (4) by the electric heating equipment (5);
the heat regulation and control part comprises a heating working condition and a defrosting working condition:
(1) heating condition:
when the sun exists in sunny days, the outdoor fan (7) is started, the outdoor heat exchanger (1) absorbs heat comprising solar energy and air energy, the heat is conveyed to the compressor (3) through the refrigerant along with electric auxiliary heat regulation and control of the electric heating equipment (5), and indoor heating is achieved;
when the sun does not exist in the daytime, the outdoor fan (7) is started, the outdoor heat exchanger (1) absorbs heat of air energy, the heat is conveyed to the compressor (3) through the refrigerant along with electric auxiliary heat regulation of the electric heating equipment (5), and indoor heating is achieved;
(2) defrosting condition:
firstly, the control system detects a frosting sensing signal and enters a defrosting working condition;
the outdoor heat exchanger (1) is switched to a condensation mode from an evaporation mode, and the indoor heat exchanger (4) is switched to the evaporation mode from the condensation mode;
the compressor (3), the electric heating equipment and the outdoor fan (7) are stopped, the four-way reversing valve (2) is reversed, after a certain time, the refrigerant medium is relatively stable, the compressor (3) and the electric heating equipment (5) are restarted, and when solar irradiation exists, the solar radiation energy is absorbed into the outdoor heat exchanger (1) to defrost the outdoor heat exchanger (1);
after defrosting is finished, the compressor (3) and the electric heating equipment (5) are closed, the outdoor heat exchanger (1) is switched to the evaporation mode from the condensation mode, the indoor heat exchanger (4) is switched to the condensation mode from the evaporation mode, the four-way reversing valve (2) reverses, and after a certain time and the refrigerant medium is relatively stable, the compressor (3), the electric heating equipment (5) and the outdoor fan (7) are restarted;
in the defrosting working condition process, the outdoor fan (7) is kept in a closed state, and after defrosting is finished, the four-way reversing valve (2) is reversed to drive the outdoor fan (7) to start.
2. The method of claim 1 for controlling a multi-dimensional heat source drive controlled outdoor defroster, comprising: the electric heating equipment (5) is arranged at the position of a condensation outlet of the outdoor heat exchanger (1) and an evaporation inlet of the indoor heat exchanger (4) in the heating working condition situation; the electric heating device (5) adopts a pipeline type electric heating mechanism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011241132.5A CN112325505B (en) | 2020-11-09 | 2020-11-09 | Outdoor defrosting device driven and controlled by multi-dimensional heat source and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011241132.5A CN112325505B (en) | 2020-11-09 | 2020-11-09 | Outdoor defrosting device driven and controlled by multi-dimensional heat source and control method thereof |
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| CN112325505A CN112325505A (en) | 2021-02-05 |
| CN112325505B true CN112325505B (en) | 2022-02-25 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101033870A (en) * | 2006-03-10 | 2007-09-12 | 叶可 | Standard air-conditioning |
| CN101413720A (en) * | 2008-10-20 | 2009-04-22 | 朴荣山 | Solar energy and electric energy heat source heat supplying cold air apparatus |
| CN101929764A (en) * | 2010-09-29 | 2010-12-29 | 中原工学院 | Solar energy-air-geothermal energy three-heat-source heat pump air conditioning unit |
| CN106524389A (en) * | 2015-09-15 | 2017-03-22 | 上海日立电器有限公司 | Air conditioner defrosting method and air conditioner thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020090944A (en) * | 2018-12-07 | 2020-06-11 | 愛知製鋼株式会社 | Solar power generation system |
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2020
- 2020-11-09 CN CN202011241132.5A patent/CN112325505B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101033870A (en) * | 2006-03-10 | 2007-09-12 | 叶可 | Standard air-conditioning |
| CN101413720A (en) * | 2008-10-20 | 2009-04-22 | 朴荣山 | Solar energy and electric energy heat source heat supplying cold air apparatus |
| CN101929764A (en) * | 2010-09-29 | 2010-12-29 | 中原工学院 | Solar energy-air-geothermal energy three-heat-source heat pump air conditioning unit |
| CN106524389A (en) * | 2015-09-15 | 2017-03-22 | 上海日立电器有限公司 | Air conditioner defrosting method and air conditioner thereof |
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| CN112325505A (en) | 2021-02-05 |
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