CN110736125A - direct-expansion type solar energy-air-soil multiple source heat pump and operation adjusting method thereof - Google Patents

direct-expansion type solar energy-air-soil multiple source heat pump and operation adjusting method thereof Download PDF

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CN110736125A
CN110736125A CN201910997954.7A CN201910997954A CN110736125A CN 110736125 A CN110736125 A CN 110736125A CN 201910997954 A CN201910997954 A CN 201910997954A CN 110736125 A CN110736125 A CN 110736125A
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valve
air
heat
heat exchanger
compressor
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杨卫波
张来军
汪峰
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Yangzhou University
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Yangzhou University
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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
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
    • F24D11/0221—Central heating systems using heat accumulated in storage masses using heat pumps water heating system combined with solar energy
    • 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
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/40—Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
    • 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
    • F25B30/00—Heat pumps
    • F25B30/06—Heat pumps characterised by the source of low potential heat
    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/11—Geothermal energy
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F24D2200/123—Compression type heat pumps
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/14—Solar energy
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/60—Planning or developing urban green infrastructure
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/40—Geothermal heat-pumps
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

direct expansion type solar energy-air-soil composite source heat pump and its operation regulation method, belonging to the heat pump air conditioner utilization technology field, composed of compressor, water cooled condenser, air cooled condenser, throttle valve, buried heat exchanger, solar energy-air type evaporator, heat preservation water tank, refrigerant circulation pipeline.

Description

direct-expansion type solar energy-air-soil multiple source heat pump and operation adjusting method thereof
Technical Field
The invention belongs to the technical field of heat pump air conditioner utilization, relates to multiple source heat pumps and an operation adjusting method thereof, and particularly relates to direct expansion type solar energy-air-soil multiple source heat pumps which flexibly allocate and comprehensively and efficiently utilize solar energy, air and soil heat sources and an operation adjusting method thereof.
Background
The air source heat pump is pushed to be for heating in northern cold areas, wherein the temperature in winter is lower (20-30 ℃ below zero throughout the year), the heating heat load is large, the heating time is long, the weather in summer is cool, the air conditioning cold load is smaller, and the typical climate area mainly using heat supply is provided.
However, when a single soil source heat pump is used for continuous heating, the soil temperature is gradually reduced due to continuous heat extraction of the buried pipe heat exchanger, and the continuous operation time is longer, the soil temperature reduction amplitude is larger and more obvious, particularly in northern cold regions, the efficiency of the heat pump unit is influenced, and the 'cold accumulation' of the soil and the heat imbalance of the soil after long-term operation are caused, so that the system operation efficiency is low, and even the system cannot normally operate.
In order to better promote the application of air source heat pumps and soil source heat pumps in the heating of northern cold climate areas, brand new heat pump systems are necessary to be provided to overcome the defects that the temperature is low in the operation of a single air source heat pump and the temperature of soil is continuously reduced in the operation of the soil source heat pump.
Disclosure of Invention
The invention aims to provide direct expansion type solar energy-air-soil combined source heat pumps and an operation adjusting method thereof aiming at the defects of heating by adopting a single air source heat pump and a soil source heat pump in the northern cold area at present, so that the heating defects of the single air source heat pump and the soil source heat pump can be overcome, and the operation energy efficiency of the heat pump can be improved.
kinds of direct expansion type solar energy-air-soil composite source heat pump, which is characterized in that the composite source heat pump is formed by connecting a compressor, a water-cooled condenser, an air-cooled condenser, a throttle valve, a buried heat exchanger, a solar energy-air type evaporator, a heat preservation water tank and a refrigerant circulating pipeline, wherein the water-cooled condenser is arranged in the heat preservation water tank and used for heating water, the air-cooled condenser is arranged indoors and used for heating air, the outlet of the compressor is communicated with the inlet of the water-cooled condenser through a valve , the outlet of the compressor is communicated with the inlet of the air-cooled condenser through a second valve 1, the outlet of the compressor is communicated with the inlet of the buried heat exchanger through a third valve , the outlet of the water-cooled condenser is connected with the inlet of the throttle valve through a fourth valve , the outlet of the air-cooled condenser is connected with the inlet of the throttle valve through a fifth valve , the outlet of the buried heat exchanger is connected with the inlet of the throttle valve through a sixth valve , the outlet of the throttle valve is connected with the inlet of the solar energy-air-ground heat exchanger through a seventh valve 5, the outlet of the buried heat exchanger is connected with the inlet of the compressor through an eighth valve , and the outlet of the buried heat exchanger is communicated with the inlet of the compressor through a ninth valve 3876.
The solar energy-air type evaporator is formed by integrating an air-cooled heat exchanger on the back of a solar heat collecting plate, and the solar heat collecting plate is a self-cleaning panel with a super-hydrophobic coating.
The buried heat exchanger is an anti-corrosion metal heat exchanger and is used as a heat pump evaporator or condenser according to a working mode, and the buried heat exchanger is in a vertical U-shaped pipe or a horizontal coiled pipe or a horizontal spiral pipe.
The operation regulation method of the direct expansion type solar energy-air-soil multiple source heat pump is characterized by comprising the following steps:
(1) the solar energy-air source heat pump heat supply mode adopts the operation mode when the heat load is not large and the solar energy-air type evaporator is independently used for absorbing heat to meet the heat supply requirement of a building, at the moment, high-temperature and high-pressure refrigerant steam discharged by a compressor respectively flows into a water-cooled condenser and an air-cooled condenser for heat dissipation and cooling, then enters the solar energy-air type evaporator by throttling and pressure reduction of a throttle valve, enters the compressor after heat absorption and evaporation from solar energy or air, and thus refrigerant thermodynamic cycles are completed, at the moment, a valve 0, a second valve , a fourth valve , a fifth valve , a seventh valve and a tenth valve are opened, and a third valve , a sixth valve and a ninth valve are closed;
(2) the ground source heat pump heat supply mode is adopted when no solar radiation exists, at the moment, the buried heat exchanger is used as an evaporator, high-temperature and high-pressure refrigerant vapor discharged by a compressor respectively enters a water-cooled condenser and an air-cooled condenser for heat dissipation and cooling, then enters the buried heat exchanger through throttling and pressure reduction of a throttle valve, enters the compressor after heat absorption and evaporation from soil, and accordingly refrigerant thermodynamic cycles are completed, and in the mode, a valve 0, a second valve 1, a fourth valve , a fifth valve , an eighth valve and a ninth valve are opened, and a third valve , a sixth valve , a seventh valve and a tenth valve are closed;
(3) the solar energy-air-soil source heat pump heat supply mode is adopted when the heat load is large and the solar energy-air type evaporator is used alone to absorb heat and can not meet the heat supply requirement of a building, at the moment, the underground heat exchanger is used as the evaporator, high-temperature and high-pressure refrigerant steam discharged by the compressor respectively flows into the water-cooled condenser and the air-cooled condenser to be subjected to heat dissipation and cooling, is throttled and depressurized by a throttle valve, simultaneously enters the underground heat exchanger and the solar energy-air type evaporator, and enters the compressor after heat absorption and evaporation from solar energy or air and soil so as to complete refrigerant thermodynamic cycles, at the moment, a valve , a second valve , a fourth valve , a fifth valve , a seventh valve , a tenth valve are opened, and a third valve and a sixth valve are closed;
(4) the method comprises the following steps of adopting an operation mode for timely recovering soil temperature when soil thermal unbalance is caused due to the fact that the temperature of continuously heated soil is reduced, enabling a buried heat exchanger to serve as a condenser, enabling high-temperature and high-pressure refrigerant steam discharged by a compressor to enter the buried heat exchanger, throttling and reducing the pressure of the refrigerant steam by a throttle valve after the refrigerant steam cools underground heat discharge, enabling the refrigerant steam to enter a solar-air type evaporator, enabling the refrigerant steam to enter the compressor after the refrigerant steam absorbs heat from solar energy or air, and completing refrigerant thermodynamic cycles, wherein at the moment, a valve 0, a sixth valve 1, a seventh valve 2 and a tenth valve are opened, and a valve , a second valve , a fourth valve , a fifth valve , an eighth valve and a ninth valve are closed.
The direct-expansion type solar energy-air-soil heat pump and the operation adjusting method thereof have the advantages that the composite source heat pump system is novel in structure and clear in adjusting principle, a solar energy-air source heat pump heating mode is preferentially used in daytime according to outdoor environment conditions, when the heating load of a building is increased and a single solar energy-air type evaporator is insufficient, the solar energy-air-soil source heat pump heating mode is adopted, the single soil source heat pump heating mode is only used in nights or rainy days without solar radiation, and the soil heat storage heat supplementing mode is only used for adjusting soil heat balance.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
In the figure, a compressor 1, a water-cooled condenser 2, an air-cooled condenser 3, a throttle valve 4, a buried heat exchanger 5, a solar-air type evaporator 6, a heat preservation water tank 7, an th valve 8-1, a second valve 08-2, a third valve 8-3, a fourth valve 8-4, a fifth valve 8-5, a sixth valve 8-6, a seventh valve 8-7, an eighth valve 8-8, a ninth valve 8-9, a tenth valve 8-10 and a refrigerant circulating pipeline 9 are arranged in the buried heat exchanger.
Detailed Description
The invention is further described with reference to the following drawings:
as shown in fig. 1, direct expansion type solar energy-air-soil composite source heat pump is composed of a compressor 1, a water-cooled condenser 2, an air-cooled condenser 3, a throttle valve 4, a buried heat exchanger 5, a solar energy-air type evaporator 6, a heat preservation water tank 7 and a refrigerant circulating pipeline 9 which are connected, wherein the water-cooled condenser 2 is arranged in the heat preservation water tank 7 and used for heating water, the air-cooled condenser 3 is arranged indoors and used for heating air, an outlet of the compressor 1 is communicated with an inlet of the water-cooled condenser 2 through a valve -1, an outlet of the compressor 1 is communicated with an inlet of the air-cooled condenser 3 through a second valve -2, an outlet of the compressor 1 is communicated with an inlet of the buried heat exchanger 5 through a third valve -3, an outlet of the water-cooled condenser 2 is connected with an inlet of the throttle valve 4 through a fourth valve -4, an outlet of the air-cooled condenser 3 is connected with an inlet of the throttle valve 4 through a fifth valve -5, an outlet of the buried heat exchanger 735 is connected with an inlet of the throttle valve through a sixth valve 6-6, an outlet of the buried heat exchanger 5 is connected with an inlet of the compressor 5 through a ninth valve 3878, an outlet of the buried heat exchanger 5, and an outlet of the buried heat exchanger 5 is connected with an inlet of the buried heat exchanger 468-9 of the buried heat exchanger 468.
As shown in figure 1, direct expansion type solar energy-air-soil composite source heat pumps are provided, wherein a solar energy-air type evaporator 6 is formed by integrating an air cooling type heat exchanger on the back of a solar heat collecting plate, the solar heat collecting plate is a self-cleaning panel with a super-hydrophobic coating, and a buried heat exchanger 5 is an anti-corrosion metal heat exchanger and is used as a heat pump evaporator or condenser according to a working mode and is in the form of a vertical U-shaped pipe, a horizontal coiled pipe or a horizontal spiral pipe.
As shown in fig. 1, methods for regulating the direct-expansion solar energy-air-soil multiple-source heat pump are as follows:
(1) the solar energy-air source heat pump heat supply mode adopts the operation mode when the heat load is not large and the solar energy-air type evaporator is used alone to absorb heat to meet the heat supply requirement of a building, at the moment, high-temperature and high-pressure refrigerant steam discharged by the compressor 1 respectively flows into the water-cooled condenser 2 and the air-cooled condenser 3 to be cooled, then flows through the throttle valve 4 to be throttled and decompressed to enter the solar energy-air type evaporator 6, and enters the compressor 1 after absorbing heat from solar energy or air to complete heat circulation of the refrigerant, at the moment, a valve 08-1, a second valve 8-2, a fourth valve 8-4, a fifth valve 8-5, a seventh valve 8-7 and a tenth valve 8-10 are opened, and a third valve 8-3, a sixth valve 8-6 and a ninth valve 8-9 are closed;
(2) the ground source heat pump heat supply mode is adopted when no solar radiation exists, at the time, the buried heat exchanger 5 is used as an evaporator, high-temperature and high-pressure refrigerant vapor discharged by the compressor 1 respectively enters the water-cooled condenser 2 and the air-cooled condenser 3 for heat dissipation and cooling, then enters the buried heat exchanger 5 by throttling and pressure reduction through the throttle valve 4, enters the compressor 1 after heat absorption and evaporation from soil, and accordingly refrigerant thermodynamic cycles are completed, in the mode, a valve 08-1, a second valve 18-2, a fourth valve 8-4, a fifth valve 8-5, an eighth valve 8-8 and a ninth valve 8-9 are opened, and a third valve 8-3, a sixth valve 8-6, a seventh valve 8-7 and a tenth valve 8-8 are closed;
(3) the heat supply mode of the solar energy-air-soil source heat pump is adopted when the heat load is large and the heat absorption of the solar energy-air type evaporator is singly used, the heat supply requirement of a building can not be met, at the moment, the buried heat exchanger 5 is used as the evaporator, high-temperature and high-pressure refrigerant steam discharged by the compressor 1 respectively flows into the water-cooled condenser 2 and the air-cooled condenser 3 for heat dissipation and cooling, the high-temperature and high-pressure refrigerant steam is throttled and reduced in pressure by the throttle valve 4 and simultaneously enters the buried heat exchanger 5 and the solar energy-air type evaporator 6, and enters the compressor 1 after the heat absorption and evaporation from the solar energy or the air and the soil, so that refrigerant thermodynamic cycles are completed, at the moment, the th valve 8-1, the second valve 8-2, the fourth valve 8-4, the fifth valve 8-5, the seventh valve 8-7, the 8-10 are opened, the third valve 8-3 and the sixth valve 8-6 are closed;
(4) the method comprises the following steps of adopting a soil heat storage and heat supplement mode for timely recovery of soil temperature when soil temperature is unbalanced due to reduction of continuous heat extraction soil temperature, enabling the buried heat exchanger 5 to serve as a condenser, enabling high-temperature and high-pressure refrigerant steam discharged by a compressor 1 to enter the buried heat exchanger 5, throttling and reducing pressure by a throttle valve 4 after the underground heat extraction is cooled, enabling the refrigerant steam to enter a solar-air type evaporator 6, enabling the refrigerant steam to enter the compressor 1 after heat absorption and evaporation from solar energy or air, and completing thermodynamic refrigerant cycles, wherein a valve 08-3, a sixth valve 18-6, a seventh valve 28-7, a tenth valve 8-10 are opened, a valve 8-1, a second valve 8-2, a fourth valve 8-4, a fifth valve 8-5, an eighth valve 8-8 and a ninth valve 8-9 are closed.

Claims (4)

  1. The direct expansion type solar energy-air-soil composite source heat pump is characterized in that the composite source heat pump is formed by connecting a compressor (1), a water-cooled condenser (2), an air-cooled condenser (3), a throttle valve (4), a buried heat exchanger (5), a solar energy-air type evaporator (6), a heat preservation water tank (7) and a refrigerant circulating pipeline (9), wherein the water-cooled condenser (2) is arranged in the heat preservation water tank (7) and used for heating water, the air-cooled condenser (3) is arranged indoors and used for heating air, an outlet of the compressor (1) is communicated with an inlet of the water-cooled condenser (2) through a second valve 3668 (8-1) 68 (8-1), an outlet of the compressor (1) is communicated with an inlet of the air-cooled condenser (3) through a second valve (8-2), an outlet of the compressor (1) is communicated with an inlet of the buried heat exchanger (5) through a third valve (8-3), an outlet of the compressor (2) is communicated with an inlet of the buried heat exchanger (5) through a fourth valve 368-4, an outlet of the buried heat exchanger (2) is connected with an inlet of the buried heat exchanger (3) through a ninth valve (8-5), an outlet of the buried heat exchanger (3) is communicated with an inlet of the compressor (3), an outlet of the buried heat exchanger () through a ninth valve (8-5), an outlet of the air-9) of the buried heat exchanger (6), and an outlet of the buried heat exchanger (6) are connected with an inlet of the buried heat exchanger (6), and an outlet of the compressor (6), and an outlet of the heat exchanger (8-9) of the heat exchanger (1) through a ninth valve (8-9), and an outlet of the heat exchanger (8-9) of the buried heat.
  2. 2. The direct expansion type solar-air-soil multiple source heat pump is characterized in that the solar-air evaporator (6) is formed by integrating an air-cooled heat exchanger on the back of a solar heat collecting plate, and the solar heat collecting plate is a self-cleaning panel with a super-hydrophobic coating.
  3. 3. The kinds of direct expansion type solar-air-soil multiple source heat pump according to claim 1, wherein the buried heat exchanger (5) is an anti-corrosion metal heat exchanger, and is used as a heat pump evaporator or condenser according to an operation mode, and is in the form of a vertical U-shaped pipe, a horizontal coiled pipe or a horizontal spiral pipe.
  4. 4, method for adjusting the operation of the direct-expansion solar-air-soil multiple source heat pump, which is characterized in that the direct-expansion solar-air-soil multiple source heat pump as claimed in any of claims 1-3 is used, and the adjusting method is as follows:
    (1) when the heat load is not large, the solar-air source heat pump heat supply mode is adopted, and when the solar-air type evaporator is used alone to absorb heat to meet the heat supply requirement of a building, high-temperature and high-pressure refrigerant steam discharged by the compressor (1) flows into the water-cooled condenser (2) and the air-cooled condenser (3) respectively to be cooled in a heat dissipation manner, the high-temperature and high-pressure refrigerant steam is throttled by the throttle valve (4) and is decompressed to enter the solar-air type evaporator (6), and then enters the compressor (1) after absorbing heat from solar energy or air, so that refrigerant thermodynamic cycles are completed, wherein the valve 0(8-1), the second valve (8-2), the fourth valve (8-4), the fifth valve (8-5), the seventh valve (8-7), the tenth valve (8-10) is opened, the third valve (8-3), the sixth valve (8-6) and the ninth valve (8-9) are closed;
    (2) the ground source heat pump heating mode is adopted when no solar radiation exists, at the moment, the buried heat exchanger (5) is used as an evaporator, high-temperature and high-pressure refrigerant steam discharged by the compressor (1) respectively enters the water-cooled condenser (2) and the air-cooled condenser (3) for heat dissipation and cooling, then enters the buried heat exchanger (5) in a throttling and pressure reduction mode through the throttle valve (4), enters the compressor (1) after heat absorption and evaporation from soil, and accordingly refrigerant thermodynamic cycles are completed, and in the mode, a valve 0(8-1), a second valve 1(8-2), a fourth valve (8-4), a fifth valve (8-5), an eighth valve (8-8) and a ninth valve (8-9) are opened, a third valve (8-3), a sixth valve (8-6), a seventh valve (8-7) and a tenth valve (8-10) are closed;
    (3) the heat supply mode of the solar-air-ground source heat pump is adopted when the heat load is large and the solar-air evaporator is used alone to absorb heat and cannot meet the heat supply requirement of a building, at the moment, the buried heat exchanger (5) is used as the evaporator, high-temperature and high-pressure refrigerant steam discharged by the compressor (1) respectively flows into the water-cooled condenser (2) and the air-cooled condenser (3) to be cooled in a heat dissipation way, is throttled and depressurized by the throttle valve (4), simultaneously enters the buried heat exchanger (5) and the solar-air evaporator (6), and enters the compressor (1) after absorbing heat and evaporating from solar energy or air and soil, so that refrigerant thermodynamic cycles are completed, at the moment, the th valve (8-1), the second valve (8-2), the fourth valve (8-4), the fifth valve (8-5), the seventh valve (8-7), the tenth valve (8-10) is opened, and the (8-3) and the sixth valve -6) are closed;
    (4) the soil heat storage and heat supplement mode is adopted for timely recovery of soil temperature when soil temperature is reduced due to continuous heat extraction and soil heat imbalance is caused, at the moment, the buried heat exchanger (5) is used as a condenser, high-temperature and high-pressure refrigerant vapor discharged by the compressor (1) enters the buried heat exchanger (5), is throttled and reduced in pressure by the throttle valve (4) after being cooled to underground heat extraction, enters the solar-air type evaporator (6), and enters the compressor (1) after heat absorption and evaporation from solar energy or air, so that refrigerant thermodynamic cycles are completed, at the moment, the valve (8-8293), the sixth valve 1(8-6), the seventh valve (8-7) and the tenth valve (8-10) are opened, and the valve (8-1), the second valve (8-2), the fourth valve (8-4), the fifth valve (8-5), the eighth valve (8-8) and the ninth valve (8-9) are closed.
CN201910997954.7A 2019-10-21 2019-10-21 direct-expansion type solar energy-air-soil multiple source heat pump and operation adjusting method thereof Pending CN110736125A (en)

Priority Applications (1)

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