CN111059609A - Intermittent multistage heat pump energy stabilizing system - Google Patents
Intermittent multistage heat pump energy stabilizing system Download PDFInfo
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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
- F24D15/00—Other domestic- or space-heating systems
- F24D15/02—Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
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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
- 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
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
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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
- F24D2200/00—Heat sources or energy sources
- F24D2200/11—Geothermal energy
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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
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
- F24D2200/123—Compression type 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
- F24D2200/00—Heat sources or energy sources
- F24D2200/32—Heat sources or energy sources involving multiple heat sources in combination or as alternative heat sources
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Abstract
The invention belongs to the technical field of new energy centralized heating, and particularly relates to an intermittent multi-stage heat pump energy stabilizing system which comprises an air source heat pump, a water source heat pump and an energy storage box; the air source heat pump forms a first loop; the water source heat pump forms a second loop; the energy storage box, the first water-cooled heat exchanger and the second water-cooled heat exchanger are positioned in the third loop; the third water-cooled heat exchanger is positioned in the fourth loop; an energy storage body is arranged in the energy storage box, and the energy storage body moves in the energy storage box under the action of water flow; the energy storage monomers comprise a first energy storage monomer and a second energy storage monomer, the first energy storage monomer is made of a first phase change material, the second energy storage monomer is made of a second phase change material, and the phase change temperatures of the first phase change material and the second phase change material are different. The air source heat pump can still normally operate at a lower temperature, and the energy storage box provides a stable low-temperature water source for the water source heat pump; the energy storage box stores and releases heat in a wider temperature range.
Description
Technical Field
The invention belongs to the technical field of new energy centralized heating, and particularly relates to an intermittent multi-stage heat pump energy stabilizing system.
Background
At present, the northern civil and agricultural fields need to provide a stable heat source. The traditional heating mode comprises coal-fired heating and natural gas heating. Although the coal-fired heating has lower cost, the coal-fired heating pollutes the environment. Natural gas supplies heat, the gas source is short, and the price is high. In order to protect the environment and use clean energy, the heating mode adopted in the prior art is as follows: air source heat pump, double-stage compression heat pump, water source heat pump.
The air source heat pump has unstable heating in a low-temperature environment lower than minus 15 ℃, the provided temperature cannot meet the basic requirement of heat supply, the service life of equipment is short, and a mode of adding electric auxiliary heat in the defrosting process of the heat pump unit is used as system heat supplement, so that the electric load for heating can be increased. The double-stage compression heat pump has a complex system structure and high manufacturing cost. The water source heat pump needs to pump groundwater, which causes pollution and waste of groundwater resources and may cause ground subsidence.
Disclosure of Invention
The invention aims to solve the technical problems and provides an intermittent multistage heat pump energy stabilizing system.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
an intermittent multi-stage heat pump energy stabilizing system comprises an air source heat pump, wherein the air source heat pump comprises a first compressor, an air-cooled heat exchanger and a first water-cooled heat exchanger; the air-cooled heat exchanger and the first water-cooled heat exchanger are respectively connected with the first compressor; the water source heat pump comprises a second compressor, a second water-cooling heat exchanger and a third water-cooling heat exchanger; the third water-cooling heat exchanger and the second water-cooling heat exchanger are respectively connected with the second compressor; the first water-cooling heat exchanger and the second water-cooling heat exchanger are connected with the energy storage box; the air source heat pump forms a first loop, and the primary side of the first water-cooling heat exchanger is positioned in the first loop; the water source heat pump forms a second loop, and the secondary side of the second water-cooling heat exchanger and the primary side of the third water-cooling heat exchanger are both positioned in the second loop; the energy storage box, the secondary side of the first water-cooling heat exchanger and the primary side of the second water-cooling heat exchanger are all positioned in the third loop; the secondary side of the third water-cooling heat exchanger is positioned in the fourth loop; an energy storage body is arranged in the energy storage box, and the energy storage body moves in the energy storage box under the action of water flow; the water flow in the energy storage box enters the energy storage body and flows out of the energy storage body; the energy storage body comprises a plurality of energy storage monomers, and the energy storage monomers move in the energy storage body under the action of water flow; the energy storage monomer is divided into a first energy storage monomer and a second energy storage monomer, the first energy storage monomer is composed of a first phase change material, the second energy storage monomer is composed of a second phase change material, and the phase change temperatures of the first phase change material and the second phase change material are different.
Further, the temperature of the phase change point of the energy storage body is 25-40 ℃; the energy storage temperature of the energy storage body is 30-45 ℃, and the heat release temperature is 15-35 ℃.
Furthermore, a pipeline between the outlet of the energy storage box and the inlet of the primary side of the second water-cooled heat exchanger is a water outlet pipeline; a first pipeline is arranged between the outlet of the primary side of the second water-cooling heat exchanger and the inlet of the secondary side of the first water-cooling heat exchanger, and a water inlet pipeline is arranged between the outlet of the secondary side of the first water-cooling heat exchanger and the inlet of the energy storage box; the energy storage tank, the water outlet pipeline, the second water-cooled heat exchanger, the first pipeline, the first water-cooled heat exchanger and the water inlet pipeline are sequentially connected to form a closed third loop; a bypass pipeline is arranged between the water inlet pipeline and the water outlet pipeline.
Furthermore, a first loop regulating valve and a first energy regulating valve are successively arranged on the water inlet pipeline along the circulating flow direction of circulating water inside the water inlet pipeline; the water outlet pipeline is provided with an energy storage pump and a one-way valve in sequence along the circulating flow direction; one end of the bypass pipeline is positioned between the first loop regulating valve and the first energy regulating valve, and the other end of the bypass pipeline is positioned between the outlet of the energy storage box and the inlet of the energy storage pump; the bypass pipeline is provided with a second energy regulating valve.
Further, a secondary side inlet of the third water-cooling heat exchanger is connected with a user side water return pipeline, and a secondary side outlet of the third water-cooling heat exchanger is connected with a user side water supply pipeline.
Furthermore, a second pipeline is arranged between the first pipeline and the user side water return pipeline, and a third pipeline is arranged between the water inlet pipeline and the user side water supply pipeline.
Furthermore, a user side circulating pump is arranged on the user side water return pipeline, a fourth loop regulating valve is arranged on the user side water supply pipeline, and circulating water in the fourth loop sequentially flows through the user side circulating pump, the third water-cooling heat exchanger and the fourth loop regulating valve; one end of the second pipeline is positioned between the outlet of the user side circulating pump and the secondary side inlet of the third water-cooling heat exchanger, and the other end of the second pipeline is positioned on the first pipeline; the second pipeline is provided with a third loop regulating valve.
Furthermore, one end of the third pipeline is positioned between the secondary side outlet of the first water-cooling heat exchanger and the first loop regulating valve, and the other end of the third pipeline is positioned on a user side water supply pipeline connected with the outlet of the fourth loop regulating valve; the third pipeline is provided with a second loop regulating valve.
Further, the air source heat pump and the water source heat pump are combined into an integrated modular integrated device.
Further, the air-source heat pump refrigerant is R410a or R22; the refrigerant of the water source heat pump is R410a or R134 a.
Compared with the prior art, the invention has the beneficial technical effects that:
(1) the air source heat pump can still normally operate at a lower temperature, and the energy storage box can provide a stable low-temperature water source for the water source heat pump; the energy storage body can improve the energy storage and the energy release efficiency of the energy storage box, and two different phase-change materials in the energy storage body can ensure that the energy storage box can store and release heat within a wider temperature range.
(2) The energy storage box stores heat and releases heat to share the same loop, and the loop is simple in structure, convenient to control and low in cost.
(3) The invention can convert different heat supply modes according to different heat demands of users.
Drawings
FIG. 1 is a diagram of an intermittent multistage heat pump energy stabilizing system according to an embodiment;
FIG. 2 is a cross-sectional view of an energy storage tank according to an embodiment;
FIG. 3 is a schematic diagram of an integrated modular integrated apparatus according to an embodiment;
fig. 4 is a diagram of an intermittent multistage heat pump energy stabilizing system according to the second embodiment.
In the figure, 1 — first compressor; 2-air cooling heat exchanger; 3-a first water cooled heat exchanger; 4-a second compressor; 5-a third water-cooled heat exchanger; 6-a second water-cooled heat exchanger; 7-an energy storage pump; 8-a one-way valve; 9-user side circulation pump; 10-a second energy regulating valve; 11-an energy storage body; 12-a first energy regulating valve; 13-an energy storage tank; 1401-first loop regulating valve; 1402-second loop regulator valve; 1403-third loop regulating valve; 1404-a fourth loop regulating valve; 15-energy storage monomers; 18-energy-stabilizing water tank.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.
Example one
As shown in fig. 1-3, the energy stabilizing system of the intermittent multi-stage heat pump of the present embodiment includes an air source heat pump, a water source heat pump, and an energy storage tank 13. The air source heat pump comprises a first compressor 1, an air-cooled heat exchanger 2 and a first water-cooled heat exchanger 3, wherein the air-cooled heat exchanger 2 and the first water-cooled heat exchanger 3 are respectively connected with the first compressor 1. The water source heat pump comprises a second compressor 4, a second water-cooling heat exchanger 6 and a third water-cooling heat exchanger 5, wherein the third water-cooling heat exchanger 5 and the second water-cooling heat exchanger 6 are respectively connected with the second compressor 4. The first water-cooled heat exchanger 3 and the second water-cooled heat exchanger 6 are both connected with the energy storage box 13. The air-source heat pump constitutes a first circuit in which the primary side of the first water-cooled heat exchanger 3 is located. The water source heat pump forms a second loop, and the secondary side of the second water-cooling heat exchanger 6 and the primary side of the third water-cooling heat exchanger 5 are both positioned in the second loop. The energy storage tank 13, the secondary side of the first water-cooled heat exchanger 3 and the primary side of the second water-cooled heat exchanger 6 are all positioned in the third loop. The secondary side of the third water-cooled heat exchanger 5 is positioned in a fourth loop, and the fourth loop is communicated with a user end. An energy storage body 11 is arranged in the energy storage box 13, and the energy storage body 11 moves in the energy storage box 13 under the action of water flow. The water flow in the energy storage tank 13 enters the energy storage body 11 and flows out of the energy storage body 11, and a plurality of energy storage monomers 15 are included in the energy storage body 11. The energy storage monomer 15 moves in the energy storage body 11 under the action of water flow. The energy storage monomers 15 are divided into a first energy storage monomer and a second energy storage monomer, the first energy storage monomer is made of a first phase change material, the second energy storage monomer is made of a second phase change material, and the phase change temperatures of the first phase change material and the second phase change material are different.
When the outdoor temperature is lower than-15 ℃ in winter, the air source heat pump provides hot water with the temperature lower than 45 ℃, the hot water stores heat in the energy storage box 13 through the first water-cooling heat exchanger 3, and the phase-change material in the energy storage box 13 can absorb and store the heat. The energy storage tank 13 can provide hot water at 15-35 ℃. Therefore, compared with the existing heating air source heat pump, the air source heat pump of the embodiment can provide lower temperature and still can normally operate in a low-temperature environment. The air-cooled heat exchanger 2 in the first loop absorbs heat energy from the air, and after the first loop and the third loop exchange heat through the first water-cooled heat exchanger 3, the first loop stores low-level heat energy in the air into the energy storage tank 13 in the third loop. The third loop and the second loop exchange heat through the second water-cooling heat exchanger 6, and low-level heat energy in the energy storage tank 13 is released into the second compressor 4 in the second loop through the second water-cooling heat exchanger 6, so that the energy storage tank 13 provides a stable low-temperature water source for the water source heat pump, and the high-efficiency operation of the water source heat pump is ensured. The second compressor 4 in the second circuit converts the low temperature heat source to a high temperature heat source. The high-temperature heat source is transmitted to the user side through the third water-cooling heat exchanger 5, so that the purpose of heat supply is achieved.
The kinetic energy that the outside circulation rivers of the energy storage body 11 produced makes the energy storage body 11 slowly move in energy storage box 13, and energy storage box 13 can fully contact the rivers in the internal different temperature regions of energy storage for energy storage and energy release. The inside circulation rivers that allow of energy storage body 11 pass through, guarantee rivers and the even contact of energy storage monomer 15, improve the energy storage and the efficiency of releasing of energy storage box 13, improve heat exchange efficiency. The first phase-change material and the second phase-change material can ensure that the energy storage box 13 stores and releases heat within a wider temperature range, and meanwhile, the heat can be quickly stored and released. The energy storage cells 15 are filled in the energy storage body 11 in a spherical or polyhedral shape, and may also be designed in a coil shape. The phase change materials of the first phase change material and the second phase change material are inorganic materials such as sodium sulfate decahydrate, calcium chloride hexahydrate and sodium acetate trihydrate, and can absorb and store heat.
The temperature of the phase transition point of the energy storage body 11 is 25-40 ℃. The heat release temperature of the energy storage body 11 is 15-35 ℃, and the energy storage temperature is 30-45 ℃. Therefore, the two different phase change materials in the energy storage body can ensure that the energy storage box 13 stores and releases heat in a wider temperature range. During the heating interval, the heat provided by the first loop is stored in the inorganic chemical material. Under the working condition of energy storage, when the temperature is above minus 5 ℃ below the ambient temperature in the daytime, the first loop can provide circulating water with the temperature above 45 ℃, the circulating water is subjected to heat exchange through the first water-cooling heat exchanger 3 and then provides water temperature of 30-45 ℃ for the energy storage box 13, and heat in the circulating water with the temperature of 30-45 ℃ is absorbed by the inorganic chemical material and stored in the energy storage box 13 until the circulating water is full of heat.
The first loop may provide circulating water below 45 deg.c when the temperature is below-15 deg.c. Compared with the condition that the outlet water of a single air source meets 45 ℃, the operating efficiency of the air source heat pump is obviously improved, and the service life of a core component compressor can be prolonged. The air source heat pump enters a shutdown defrosting process at a lower temperature, heat output is stopped for a short time, partial heat energy is consumed, at the moment, the energy storage box 13 releases a part of energy in the energy storage body 11 to be used as heat energy supplement in the defrosting process, and heat energy output of the whole device is not influenced. Therefore, the defrosting process of the air source heat pump does not need to use electric heating to assist heat dissipation to provide heat.
And (3) displaying through data: under the condition that the outdoor temperature is minus 15 ℃, the cop of the air source heat pump with the water outlet temperature of 20 ℃ is 3.74, and the cop of the air source heat pump with the water outlet temperature of 45 ℃ is 2.02. The outdoor temperature is at-20 ℃, the cop of the air source heat pump with the water outlet temperature of 20 ℃ is 3.10, and the cop of the air source heat pump with the water outlet temperature of 45 ℃ is 1.78. The cop is 3.02 when the outdoor temperature is 0 ℃ and the outlet water temperature of the air source heat pump is 45 ℃. Therefore, the conclusion can be drawn from the data that the efficiency of the air source heat pump can be improved by reducing the outlet water temperature when the ambient temperature is low. When the environment temperature of the first loop is lower than minus 15 ℃, the air source heat pump only needs to provide circulating water of 20 ℃, the low-temperature water energy is promoted through the second loop, and the energy efficiency ratio cop of the whole system is 2.33. When the ambient temperature is lower than minus 20 ℃, and the user water supply temperature is 45 ℃, the energy efficiency ratio of the whole system of the embodiment is cop of 2.12, and the energy efficiency ratio of the single air source heat pump is 1.78. By contrast, the energy efficiency of the whole system is improved by 15-19% compared with that of a single air source heat pump.
And a water outlet pipeline is arranged between the outlet of the energy storage tank 13 and the inlet of the primary side of the second water-cooled heat exchanger 6. A first pipeline is arranged between the outlet of the primary side of the second water-cooling heat exchanger 6 and the inlet of the secondary side of the first water-cooling heat exchanger 3. And a pipeline between the outlet of the secondary side of the first water-cooled heat exchanger 3 and the inlet of the energy storage tank 13 is a water inlet pipeline. The energy storage box 13, the water outlet pipeline, the second water-cooled heat exchanger 6, the first pipeline, the first water-cooled heat exchanger 3 and the water inlet pipeline are sequentially connected to form a closed third loop. A bypass pipeline is arranged between the water inlet pipeline and the water outlet pipeline. The water inlet pipeline is provided with a first loop regulating valve 1401 and a first energy regulating valve 12 in sequence along the circulating flow direction of the circulating water inside the water inlet pipeline. The water outlet pipeline is provided with an energy storage pump 7 and a one-way valve 8 in sequence along the circulating flow direction, and the one-way valve 8 prevents the circulating water from flowing backwards. When the energy storage box 13 is in two working conditions of heat storage and heat release, the circulating water circulating flow direction does not change, and the energy storage pump 7 can be used. Therefore, the energy storage box 13 of the embodiment shares the same loop with the heat release, and has the advantages of simple structure, convenient control and lower cost.
One end of the bypass pipeline is positioned between the first loop regulating valve 1401 and the first energy regulating valve 12, and the other end is positioned between the outlet of the energy storage tank 13 and the inlet of the energy storage pump 7. The bypass conduit is provided with a second energy regulating valve 10. The temperature of the primary side inlet water of the second water-cooled heat exchanger 6 is adjusted through the first energy adjusting valve 12 and the second energy adjusting valve 10 so as to meet the secondary side outlet water temperature requirement of the third water-cooled heat exchanger 5. The secondary side outlet water temperature of the third water-cooled heat exchanger 5 is the water supply temperature of the user side. When the temperature of the supplied water on the user side needs to be lowered, the opening degree of the second energy adjusting valve 10 is increased to lower the temperature of the primary side water-cooling heat exchanger 6. When the supply water temperature of the user side needs to be raised, the opening degree of the second energy regulating valve 10 is decreased to raise the temperature of the primary side water-cooling heat exchanger 6. A secondary side inlet of the third water-cooling heat exchanger 5 is connected with a user side water return pipeline, and a secondary side outlet is connected with a user side water supply pipeline.
A second pipeline is arranged between the first pipeline and the user side water return pipeline, and a third pipeline is arranged between the water inlet pipeline and the user side water supply pipeline. The user side water return pipeline is provided with a user side circulating pump 9, the user side water supply pipeline is provided with a fourth loop regulating valve 1404, and circulating water in the fourth loop sequentially flows through the user side circulating pump 9, the third water-cooling heat exchanger 5 and the fourth loop regulating valve 1404. One end of the second pipeline is positioned between the outlet of the user side circulating pump 9 and the secondary side inlet of the third water-cooled heat exchanger 5, and the other end of the second pipeline is positioned on the first pipeline. The second pipe is provided with a third loop regulating valve 1403. One end of the third pipeline is positioned between the outlet of the secondary side of the first water-cooling heat exchanger 3 and the first loop regulating valve 1401, and the other end is positioned on a user-side water supply pipeline connected with the outlet of the fourth loop regulating valve 1404. The third conduit is provided with a second loop regulating valve 1402.
When the first loop regulating valve 1401 and the fourth loop regulating valve 1404 are closed and the second loop regulating valve 1402 and the third loop regulating valve 1403 are opened, the air source heat pump can independently provide a heat source for a user, and the user-side return water directly supplies water for the user side after sequentially passing through the user-side circulating pump 9 and the secondary side of the first water-cooling heat exchanger 3. In order to ensure the stability of the water supply temperature of the user end, an energy stabilizing water tank 18 is arranged on a water inlet pipeline connected with an outlet of the secondary side of the first water-cooling heat exchanger 3, and the air source heat pump can store a part of heat in the energy stabilizing water tank 18 through the first water-cooling heat exchanger 3.
As shown in fig. 3, the air source heat pump and the water source heat pump of the present embodiment can be an integrated modular integrated device, and the installation is simple, so that uncertain factors of field installation are reduced, the efficiency of the whole system is improved, and the manufacturing cost can be reduced by modular processing.
The air-source heat pump refrigerant is R410a or R22. The refrigerant of the water source heat pump is R410a or R134 a. The data show that the saturated vapor pressure of R22 is 0.07bar and the saturated vapor pressure of R410a is 2.28bar when the evaporation temperature is-25 deg.C. Therefore, in a low-temperature environment, R410a is more suitable for being used as a refrigerant to absorb heat in the environment so as to ensure that the system operates stably, and the heat efficiency is improved by 6%. When the saturated vapor pressure of the refrigerant is 30bar, the temperature corresponding to R134a is 89 degrees Celsius, and the temperature corresponding to R410a is 50 degrees Celsius, and R134a is more suitable as the refrigerant when the demand of higher temperature is demanded on the user side. Therefore, the user selects the corresponding refrigerant according to the requirement.
The operation modes of the embodiment are as follows:
an energy storage mode: the water source heat pump stops running, the air source heat pump is started, the energy storage pump 7 is started, the first energy regulating valve 12 is opened, and the second energy regulating valve 10 is closed. The outlet water temperature of the air source heat pump is controlled, after heat exchange is carried out by the first water-cooling heat exchanger 3, the inlet water temperature of the energy storage box 13 is controlled to be 30-45 ℃, and the inorganic chemical material in the energy storage body 11 absorbs heat until the energy storage box 13 is full of heat.
The air source heat pump single heat supply mode is as follows: the water source heat pump stops running, the energy storage pump 7 is closed, and the air source heat pump is started. The first and fourth loop regulating valves 1401, 1404 are closed, and the second and third loop regulating valves 1402, 1403 are opened. The user side backwater directly supplies water to the user side after sequentially passing through the user side circulating pump 9 and the first water-cooling heat exchanger 3.
The energy storage box 13, the air source heat pump and the water source heat pump are in a combined heating mode: the water source heat pump is started, the air source heat pump is started, and the energy storage pump 7 is started. Both the first energy modulation valve 12 and the second energy modulation valve 10 are open. The first and fourth loop regulating valves 1401, 1404 are opened, and the second and third loop regulating valves 1402, 1403 are closed. The low-temperature heat in the energy storage box 13 is provided to the water source heat pump through the second water-cooled heat exchanger 6, and the water source heat pump absorbs the low-temperature heat and outputs the high-temperature heat. The water source heat pump provides high temperature heat to the user through the third water cooled heat exchanger 5. When the circulating water of the third loop passes through the second water-cooled heat exchanger 6, the temperature of the circulating water is reduced. When the circulating water with the reduced temperature passes through the first water-cooling heat exchanger 3, the circulating water absorbs heat provided by the air source heat pump again and returns to the energy storage box 13. According to the embodiment, an independent heating mode of the air source heat pump or a combined heating mode of the energy storage box 13, the air source heat pump and the water source heat pump can be selected according to different heat requirements of users.
Defrosting mode: in the combined heating mode, when the outdoor temperature is too low and the air source heat pump frosts and stops defrosting, the opening degrees of the first energy regulating valve 12 and the second energy regulating valve 10 are regulated to increase the output water temperature of the energy storage pump 7 and increase the heat consumed by supplementing defrosting, and the part of heat is provided without electric heating, and meanwhile, the normal operation of the water source heat pump is not influenced, and meanwhile, the temperature requirement required by a user is ensured.
Example two
As shown in fig. 4, the difference between the second embodiment and the first embodiment is that a plurality of intermittent multi-stage heat pump energy stabilizing systems are included, the plurality of intermittent multi-stage heat pump energy stabilizing systems are connected in parallel, and the air source heat pump and the water source heat pump in each intermittent multi-stage heat pump energy stabilizing system are all integrated modular integrated devices.
While the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that variations may be made in the embodiments without departing from the spirit of the invention, and such variations are to be considered within the scope of the invention.
Claims (10)
1. The utility model provides a steady ability system of multistage heat pump of intermittent type formula which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the air source heat pump comprises a first compressor (1), an air-cooled heat exchanger (2) and a first water-cooled heat exchanger (3); the air-cooled heat exchanger (2) and the first water-cooled heat exchanger (3) are respectively connected with the first compressor (1);
the water source heat pump comprises a second compressor (4), a second water-cooling heat exchanger (6) and a third water-cooling heat exchanger (5); the third water-cooling heat exchanger (5) and the second water-cooling heat exchanger (6) are respectively connected with the second compressor (4);
the first water-cooling heat exchanger (3) and the second water-cooling heat exchanger (6) are connected with the energy storage box (13);
the air source heat pump forms a first loop, and the primary side of the first water-cooling heat exchanger (3) is positioned in the first loop;
the water source heat pump forms a second loop, and the secondary side of the second water-cooling heat exchanger (6) and the primary side of the third water-cooling heat exchanger (5) are both positioned in the second loop;
the energy storage box (13), the secondary side of the first water-cooling heat exchanger (3) and the primary side of the second water-cooling heat exchanger (6) are all positioned in the third loop;
the secondary side of the third water-cooling heat exchanger (5) is positioned in the fourth loop;
an energy storage body (11) is arranged in the energy storage box (13), and the energy storage body (11) moves in the energy storage box (13) under the action of water flow; the water flow in the energy storage box (13) enters the energy storage body (11) and flows out of the energy storage body (11); the energy storage body (11) comprises a plurality of energy storage monomers (15), and the energy storage monomers (15) move in the energy storage body (11) under the action of water flow; the energy storage monomer (15) is divided into a first energy storage monomer and a second energy storage monomer, the first energy storage monomer is made of a first phase change material, the second energy storage monomer is made of a second phase change material, and the phase change temperatures of the first phase change material and the second phase change material are different.
2. The intermittent multi-stage heat pump energy stabilizing system according to claim 1, wherein: the temperature of the phase transformation point of the energy storage body (11) is 25-40 ℃; the energy storage temperature of the energy storage body (11) is 30-45 ℃, and the heat release temperature is 15-35 ℃.
3. The intermittent multi-stage heat pump energy stabilizing system according to claim 1, wherein:
a pipeline between the outlet of the energy storage box (13) and the inlet of the primary side of the second water-cooled heat exchanger (6) is a water outlet pipeline; a first pipeline is arranged between the primary side outlet of the second water-cooling heat exchanger (6) and the secondary side inlet of the first water-cooling heat exchanger (3), and a pipeline between the secondary side outlet of the first water-cooling heat exchanger (3) and the inlet of the energy storage box is a water inlet pipeline; the energy storage box (13), the water outlet pipeline, the second water-cooled heat exchanger (6), the first pipeline, the first water-cooled heat exchanger (3) and the water inlet pipeline are sequentially connected to form a closed third loop; a bypass pipeline is arranged between the water inlet pipeline and the water outlet pipeline.
4. The intermittent multi-stage heat pump energy stabilizing system according to claim 3, wherein:
the water inlet pipeline is provided with a first loop regulating valve (1401) and a first energy regulating valve (12) in sequence along the circulating flow direction of circulating water inside the water inlet pipeline; the water outlet pipeline is provided with an energy storage pump (7) and a one-way valve (8) in sequence along the circulating flow direction; one end of the bypass pipeline is positioned between the first loop regulating valve (1401) and the first energy regulating valve (12), and the other end of the bypass pipeline is positioned between the outlet of the energy storage box (13) and the inlet of the energy storage pump (7); the bypass pipeline is provided with a second energy regulating valve (10).
5. The intermittent multi-stage heat pump energy stabilizing system according to claim 3, wherein: a secondary side inlet of the third water-cooling heat exchanger (5) is connected with a user side water return pipeline, and a secondary side outlet is connected with a user side water supply pipeline.
6. The intermittent multi-stage heat pump energy stabilizing system according to claim 5, wherein: a second pipeline is arranged between the first pipeline and the user side water return pipeline, and a third pipeline is arranged between the water inlet pipeline and the user side water supply pipeline.
7. The intermittent multi-stage heat pump energy stabilizing system according to claim 6, wherein: the user side water return pipeline is provided with a user side circulating pump (9), the user side water supply pipeline is provided with a fourth loop regulating valve (1404), and circulating water in the fourth loop sequentially flows through the user side circulating pump (9), the third water-cooling heat exchanger (5) and the fourth loop regulating valve (1404); one end of the second pipeline is positioned between the outlet of the user side circulating pump (9) and the secondary side inlet of the third water-cooled heat exchanger (5), and the other end of the second pipeline is positioned on the first pipeline; the second conduit is provided with a third loop regulating valve (1403).
8. The intermittent multi-stage heat pump energy stabilizing system according to claim 7, wherein: one end of the third pipeline is positioned between the secondary side outlet of the first water-cooling heat exchanger (3) and the first loop regulating valve (1401), and the other end of the third pipeline is positioned on a user side water supply pipeline connected with the outlet of the fourth loop regulating valve (1404); the third conduit is provided with a second loop regulating valve (1402).
9. The intermittent multi-stage heat pump energy stabilizing system according to any one of claims 1 to 8, wherein: the air source heat pump and the water source heat pump are combined into an integrated modular integrated device.
10. The intermittent multi-stage heat pump energy stabilizing system according to any one of claims 1 to 8, wherein: the air-source heat pump refrigerant is R410a or R22; the refrigerant of the water source heat pump is R410a or R134 a.
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| CN206504390U (en) * | 2016-12-28 | 2017-09-19 | 任丘市大友采暖设备有限公司 | A kind of air source heat pump ceiling radiant heating plant |
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| CN108731305A (en) * | 2018-05-18 | 2018-11-02 | 杭州众来新能源科技有限公司 | Multi-source phase-change accumulation energy heat pump system |
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