CN110953768B - Ground source heat pump device for villa - Google Patents
Ground source heat pump device for villa Download PDFInfo
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- CN110953768B CN110953768B CN201911313192.0A CN201911313192A CN110953768B CN 110953768 B CN110953768 B CN 110953768B CN 201911313192 A CN201911313192 A CN 201911313192A CN 110953768 B CN110953768 B CN 110953768B
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- heat pump
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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
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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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
- F25B41/00—Fluid-circulation arrangements
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/002—Compression machines, plants or systems with reversible cycle not otherwise provided for geothermal
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Building Environments (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention relates to the field of ground source heat pumps, and particularly discloses a ground source heat pump device for villas, aiming at the problems that the existing ground source heat pump device is inconvenient to disassemble and assemble a host machine of the ground source heat pump, does not have a damping function, and is easy to influence the service life of the host machine of the ground source heat pump, the invention provides the following scheme. The invention has novel design, reasonable structure and simple operation, is convenient to disassemble and assemble the ground source heat pump host, has good damping function, can effectively prevent impurities in the air from entering the device, and is beneficial to prolonging the service life of the ground source heat pump device.
Description
Technical Field
The invention relates to the technical field of ground source heat pumps, in particular to a ground source heat pump device for villas.
Background
The ground source heat pump is a device for transferring low-grade heat energy to high-grade heat energy by inputting a small amount of high-grade energy (such as electric energy) into shallow land energy. Usually, the ground source heat pump consumes 1kWh of energy, and users can obtain heat or cold above 4.4 kWh. The ground source heat pump heating air-conditioning system mainly comprises three parts: the system comprises an outdoor ground source heat exchange system, a ground source heat pump host system and an indoor tail end system. However, the existing ground source heat pump device is inconvenient to disassemble and assemble the host machine of the ground source heat pump, does not have a damping function, and is easy to influence the service life of the host machine of the ground source heat pump, so that a ground source heat pump device for villas needs to be designed to solve the problems.
Disclosure of Invention
The invention provides a ground source heat pump device for villas, which solves the problems that the existing ground source heat pump device is inconvenient to disassemble and assemble a ground source heat pump host, does not have a damping function and easily influences the service life of the ground source heat pump host.
In order to achieve the purpose, the invention adopts the following technical scheme:
a ground source heat pump device for villas comprises a shell, wherein sleeve plates are fixed at the left end and the right end of the inner wall of the bottom of the shell, a plurality of cross rods are fixed between the two sleeve plates, two movable plates are slidably sleeved on the cross rods, a plurality of reset springs sleeved on the cross rods are arranged between the movable plates and the sleeve plates, a plurality of connecting springs are fixed on the inner wall of the bottom of each sleeve plate, a baffle is fixed between the tops of the connecting springs, guide plates are fixed at the tops of the baffle, a mounting plate is fixed between the tops of the two guide plates, a connecting block is fixed at the bottom of the mounting plate and is positioned between the two movable plates, vertical plates and limiting plates which are arranged oppositely are respectively fixed at the left end and the right end of the top of the mounting plate, an air cylinder is installed at the left end of the limiting plate, and a clamping plate is fixed on a piston rod of the air cylinder;
the heat pump buried pipe water return device is characterized in that a lifting plate parallel to the mounting plate is arranged at the top in the shell and connected with a lifting power mechanism, an arc-shaped concave surface is arranged on the lower surface of the lifting plate, the upper end face of a vertical plate is flush with the upper end face of the limiting plate, one side edge of two opposite side edges of the lifting plate is located above the upper end face of the vertical plate, the other side edge of the lifting plate is located above the upper end face of the limiting plate, a coil pipe positioning groove and a heat exchange coil pipe partially fixed in a coil pipe fixing groove are arranged on the arc-shaped concave surface, and two ends of the heat exchange coil pipe are communicated through a spiral pipe sleeved at a ground source buried pipe water return end; be equipped with half slot one at the up end face of riser, be equipped with out tuber pipe one in half slot one, be equipped with half slot two at the up end terminal surface of limiting plate, be equipped with out tuber pipe two in half slot two, be equipped with a plurality of slopes and make progress the exhaust vent one that sets up inwards on going out tuber pipe one, be equipped with a plurality of slopes and make progress the exhaust vent two that set up inwards on going out tuber pipe two, exhaust vent one and exhaust vent two-way arc concave surface side-blow, up end face at the riser still is equipped with the restriction piece, the highly being greater than the diameter of air-out pipe one of restriction piece.
Preferably, the bottom of connecting block is oval structure, has all seted up a plurality of slide openings on the fly leaf, the horizontal pole respectively with the inner wall sliding connection of slide opening, reset spring's left and right end respectively with fly leaf, lagging fixed connection.
Preferably, two the lagging is the cavity structure, and the direction mouth has all been seted up at the top of lagging, and the baffle size all is greater than the size of direction mouth, the deflector all with the inner wall sliding connection of direction mouth.
Preferably, the left end and the right end of the mounting plate are both fixed with a plurality of guide rods, the inner walls of the left end and the right end of the shell are both provided with a plurality of guide grooves, and the guide rods are respectively in sliding connection with the inner walls of the guide grooves.
Preferably, the vent has all been seted up to the left and right end of casing, and the vent all is located the top of mounting panel, is fixed with the filter on the inner wall of vent.
Preferably, the limiting plate with be fixed with many telescopic links between the splint, the cylinder is located between the telescopic link, the casing is C font structure, and the front end of casing articulates through the hinge has the side door.
The invention has the beneficial effects that:
1. the clamping plate is controlled by the air cylinder to be stably close to or far away from the vertical plate, so that the ground source heat pump host can be conveniently disassembled and assembled;
2. through the elastic action of the spring, the influence of the vibration action on the ground source heat pump host can be weakened from all directions, and the service life of the ground source heat pump host can be prolonged.
The invention has novel design, reasonable structure and simple operation, is convenient to disassemble and assemble the ground source heat pump host, has good damping function, can effectively prevent impurities in the air from entering the device, and is beneficial to prolonging the service life of the ground source heat pump device.
Drawings
Fig. 1 is a front view of a ground source heat pump device for villa with lifting plates and other parts removed.
Fig. 2 is a side view of the present fig. 1.
Fig. 3 is a front view of a ground source heat pump device for villa according to the present invention.
Fig. 4 is a state diagram of the heat exchange coil sleeved on the buried pipe.
Fig. 5 is a transverse sectional view of a second air outlet pipe of the present invention.
Fig. 6 is a structural view of an arch-shaped pressing plate according to the present invention.
In the figure: the device comprises a shell 1, a set of plates 2, a cross rod 3, a movable plate 4, a return spring 5, a connecting spring 6, a baffle 7, a guide plate 8, a mounting plate 9, a connecting block 10, a vertical plate 11, a limiting plate 12, a cylinder 13, a clamping plate 14, a guide rod 15, a guide groove 16, a vent 17, a filter plate 18, a telescopic rod 19 and a side door 20.
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.
Referring to fig. 1-2, a ground source heat pump device for villa comprises a shell 1, sleeve plates 2 are fixed at the left and right ends of the inner wall of the bottom of the shell 1, a plurality of cross rods 3 are fixed between the two sleeve plates 2, two movable plates 4 are slidably sleeved on the cross rods 3, a plurality of reset springs 5 sleeved on the cross rods 3 are arranged between the movable plates 4 and the sleeve plates 2, a plurality of connecting springs 6 are fixed on the inner wall of the bottom of the sleeve plates 2, a baffle 7 is fixed between the tops of the connecting springs 6, guide plates 8 are fixed on the tops of the baffle 7, a mounting plate 9 is fixed between the tops of the two guide plates 8, a connecting block 10 is fixed at the bottom of the mounting plate 9, the connecting block 10 is positioned between the two movable plates 4, the top of the mounting plate 9 is left, the right end is fixed with relative riser 11, the limiting plate 12 that sets up respectively, and the cylinder 13 is installed to the left end of limiting plate 12, and the piston rod of cylinder 13 is fixed with splint 14.
In the embodiment, the bottom of the connecting block 10 is an oval structure, a plurality of sliding holes are formed in the movable plate 4, the cross rods 3 are respectively connected with the inner walls of the sliding holes in a sliding manner, the left end and the right end of the reset spring 5 are respectively fixedly connected with the movable plate 4 and the sleeve plates 2, both the two sleeve plates 2 are of a cavity structure, the tops of the sleeve plates 2 are respectively provided with a guide port, the size of the baffle 7 is larger than that of the guide port, the guide plates 8 are respectively connected with the inner walls of the guide ports in a sliding manner, a plurality of guide rods 15 are fixed at the left end and the right end of the mounting plate 9, a plurality of guide grooves 16 are respectively formed in the inner walls of the left end and the right end of the shell 1, the guide rods 15 are respectively connected with the inner walls of the guide grooves 16 in a sliding manner, vent holes 17 are respectively formed in the left end and the right end of the shell 1, the vent holes 17 are both positioned above the mounting plate 9, a filter plate 18 is fixed on the inner wall of the vent hole 17, a plurality of telescopic rods 19 are fixed between the limiting plate 12 and the clamping plate 14, the cylinder 13 is located between the telescopic rods 19, the shell 1 is of a C-shaped structure, and the front end of the shell 1 is hinged with a side door 20 through a hinge.
In this embodiment, the fixing manner between the members is one of screw fixing and welding fixing. The invention has novel design, reasonable structure and simple operation, is convenient to disassemble and assemble the ground source heat pump host, has good damping function, can effectively prevent impurities in the air from entering the device, and is beneficial to prolonging the service life of the ground source heat pump device.
The working principle is as follows: in the invention, the cylinder 13 is connected with an external power supply through a wire, the switch of the cylinder can be controlled by supplying power to the cylinder through a power-on power supply, when the device is used, an operator opens the side door 20, controls the clamping plate 14 to move left and right by starting the cylinder 13, enables the clamping plate 14 to be stably close to or far away from the vertical plate 11 under the limiting action of the telescopic rods 19, places the ground source heat pump host on the mounting plate 9 and between the vertical plate 11 and the clamping plate 14, and is convenient to assemble and disassemble the ground source heat pump host, and under the matching action of the connecting block 10 and the two movable plates 4, the influence of the vibration action on the ground source heat pump host can be transversely weakened due to the elastic action of the reset spring 5; simultaneously under the elastic action of connecting spring 6, because the limiting action of lagging 2 and deflector 8, can be from the influence that vertical damping vibration effect produced the ground source heat pump host computer, have fine shock-absorbing function, filter 18 can filter the air that gets into the casing 1 inside through vent 17 in addition, can effectively avoid the impurity in the air to get into in the casing 1, is favorable to prolonging the life of ground source heat pump host computer.
In addition, as shown in fig. 3-6, a lifting plate 21 parallel to the mounting plate 9 is disposed at the top of the casing 1, the lifting plate 21 is connected to a lifting power mechanism, an arc concave surface 210 is disposed on the lower surface of the lifting plate 21, the upper end surface of the vertical plate 11 is flush with the upper end surface of the limiting plate 12, one side of two opposite sides of the lifting plate 21 is located above the upper end surface of the vertical plate 11, the other side of the lifting plate 21 is located above the upper end surface of the limiting plate 12, a coil positioning groove is disposed on the arc concave surface 210, and a heat exchange coil 23 partially fixed in a coil fixing groove is disposed, and two ends of the heat exchange coil 23 are communicated with each other through a coil 24 sleeved at a buried pipe return end of the ground source heat pump. The spiral tube 24 is a plastic tube that can be easily manufactured.
The heat energy generated by the host machine is collected by the arc-shaped concave surface 210 and is subjected to heat energy heat exchange through the heat exchange coil 23, and the heat energy after heat exchange is subjected to heat exchange with the water outlet end of the buried pipe of the ground source heat pump, so that the heat exchange efficiency and the heat energy generated by heat exchange can be improved.
In addition, be equipped with half slot one at the up end of riser 11, be equipped with out tuber pipe 25 in half slot one, be equipped with half slot two at the up end of limiting plate 12, be equipped with out tuber pipe two 26 in half slot two, be equipped with a plurality of slopes and make progress the exhaust vent one that sets up inwards on going out tuber pipe 25, be equipped with a plurality of slopes and make progress the exhaust vent two that set up inwards on going out tuber pipe two 26, exhaust vent one and exhaust vent two-way arc concave surface 210 side-blown, up end at riser 11 still is equipped with restriction piece 27, restriction piece 27 highly is greater than the diameter of an exhaust pipe 25. The limiting block 27 plays a role in protecting the air outlet pipe.
The first air outlet pipe 25 and the second air outlet pipe 26 are connected to a main air inlet pipe 28, the main air inlet pipe is rectangular and annular and is located on the periphery of the lifting plate 21, the main air inlet pipe 28 is fixed to the top of the inside of the shell 1, the air inlet end of the main air inlet pipe 28 is downwards extended to the upper end face of the limiting plate 12, an air blower is arranged at the air inlet end of the main air inlet pipe 28, and the air blower is placed on the upper end face of the limiting plate 12.
The first air outlet pipe 25 and the second air outlet pipe 26 can improve the flowing speed of internal heat, the first air outlet hole and the second air outlet hole which are obliquely arranged blow air to the side of the arc-shaped concave surface 210, the utilization rate of the heat can be improved, and the blown air is in contact with the heat exchange coil pipe 23, so that the heat exchange efficiency can be improved.
The air inlet end of the air inlet main pipe 28 extends downwards to the upper end face of the limiting plate 12, so that the internal heat can be effectively recycled, and because the heat temperature of the shell is higher than that of the bottom of the shell at the position of the relative top of the shell, the design can also be used for utilizing the heat most effectively to the greatest extent.
The axial lead of the first air outlet hole and the axial lead of the second air outlet hole form an included angle of 120 degrees.
A plurality of first arched pressing blocks are arranged on the first air outlet pipe 25, and screws penetrate through two ends of the first arched pressing blocks and are in threaded connection with the upper end face of the vertical plate 11. A plurality of second arched pressing blocks are arranged on the second air outlet pipe 26, and two ends of the second arched pressing blocks penetrate through the second screws and are in threaded connection with the upper end face of the limiting plate 12.
The lifting driving mechanism comprises a vertical screw rod penetrating through the top of the shell, the vertical screw rod is in threaded connection with the shell, the lower end of the vertical screw rod is connected with a bearing, a bearing hole is formed in the center region of the upper surface of the lifting plate 21, the bearing is installed in the bearing hole, a handle is arranged at the upper end of the vertical screw rod, a plurality of guide pillars are arranged at the top of the shell, and a plurality of guide sleeves sleeved on the guide pillars one by one are arranged on the upper surface of the lifting plate 21. The manual driving mode can be convenient to operate.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The ground source heat pump device for the villa comprises a shell (1) and is characterized in that sleeve plates (2) are fixed at the left end and the right end of the inner wall of the bottom of the shell (1), a plurality of cross rods (3) are fixed between the sleeve plates (2), two movable plates (4) are slidably sleeved on the cross rods (3), a plurality of reset springs (5) sleeved on the cross rods (3) are arranged between the movable plates (4) and the sleeve plates (2), a plurality of connecting springs (6) are fixed on the inner wall of the bottom of the sleeve plates (2), baffles (7) are fixed between the tops of the connecting springs (6), guide plates (8) are fixed on the tops of the baffles (7), mounting plates (9) are fixed between the tops of the guide plates (8), connecting blocks (10) are fixed at the bottoms of the mounting plates (9), and the connecting blocks (10) are located between the movable plates (4), the left end and the right end of the top of the mounting plate (9) are respectively fixed with a vertical plate (11) and a limiting plate (12) which are oppositely arranged, the left end of the limiting plate (12) is provided with an air cylinder (13), and a piston rod of the air cylinder (13) is fixed with a clamping plate (14);
the heat exchange device comprises a shell (1), wherein a lifting plate (21) parallel to an installation plate (9) is arranged at the top in the shell (1), the lifting plate (21) is connected with a lifting power mechanism, an arc-shaped concave surface (210) is arranged on the lower surface of the lifting plate (21), the upper end surface of a vertical plate (11) is flush with the upper end surface of a limiting plate (12), one side edge of two opposite side edges of the lifting plate (21) is positioned above the upper end surface of the vertical plate (11), the other side edge of the lifting plate (21) is positioned above the upper end surface of the limiting plate (12), a coil positioning groove is arranged on the arc-shaped concave surface (210), and a heat exchange coil (23) partially fixed in a coil fixing groove is arranged, and two ends of the heat exchange coil (23) are communicated through a spiral pipe (24) sleeved at a buried pipe water return end of a ground source heat pump; the upper end face of the vertical plate is provided with a first semicircular groove, a first air outlet pipe is arranged in the first semicircular groove, the upper end face of the limiting plate is provided with a second semicircular groove, a second air outlet pipe is arranged in the second semicircular groove, the first air outlet pipe is provided with a plurality of first air outlet holes which are obliquely arranged upwards and inwards, the second air outlet holes which are obliquely arranged upwards and inwards are arranged on the second air outlet pipe, the first air outlet holes and the first air outlet holes are subjected to side blowing by virtue of two-way arc-shaped concave surfaces, the upper end face of the vertical plate is also provided with a limiting block, and the height of the limiting block is larger than the diameter of the first air outlet pipe;
the bottom of the connecting block (10) is of an oval structure, a plurality of sliding holes are formed in the movable plate (4), the cross rods (3) are respectively connected with the inner walls of the sliding holes in a sliding mode, and the left end and the right end of the reset spring (5) are respectively fixedly connected with the movable plate (4) and the sleeve plate (2);
a plurality of telescopic rods (19) are fixed between the limiting plate (12) and the clamping plate (14), and the air cylinder (13) is positioned between the telescopic rods (19);
the air outlet pipe I (25) and the air outlet pipe II (26) are connected to an air inlet main pipe (28), the air inlet main pipe is rectangular and annular and is positioned on the periphery of the lifting plate (21), the air inlet main pipe (28) is fixed at the inner top of the shell (1), the air inlet end of the air inlet main pipe (28) is downwards extended to be above the upper end face of the limiting plate (12), an air blower is arranged at the air inlet end of the air inlet main pipe (28), and the air blower is placed on the upper end face of the limiting plate (12);
two lagging (2) are the cavity structure, and the direction mouth has all been seted up at the top of lagging (2), and the size of baffle (7) all is greater than the size of direction mouth, deflector (8) all with the inner wall sliding connection of direction mouth.
2. The ground source heat pump device for the villa as recited in claim 1, characterized in that a plurality of guide rods (15) are fixed at the left end and the right end of the mounting plate (9), a plurality of guide grooves (16) are arranged on the inner walls of the left end and the right end of the shell (1), and the guide rods (15) are respectively connected with the inner walls of the guide grooves (16) in a sliding manner.
3. The ground source heat pump device for the villa as recited in claim 1, characterized in that the left and right ends of the shell (1) are both provided with air vents (17), the air vents (17) are both positioned above the mounting plate (9), and the inner walls of the air vents (17) are fixed with filter plates (18).
4. The ground source heat pump device for villa as claimed in claim 1, characterized in that the shell (1) is of a C-shaped structure, and the front end of the shell (1) is hinged with a side door (20) through a hinge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911313192.0A CN110953768B (en) | 2019-12-18 | 2019-12-18 | Ground source heat pump device for villa |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911313192.0A CN110953768B (en) | 2019-12-18 | 2019-12-18 | Ground source heat pump device for villa |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110953768A CN110953768A (en) | 2020-04-03 |
| CN110953768B true CN110953768B (en) | 2021-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911313192.0A Active CN110953768B (en) | 2019-12-18 | 2019-12-18 | Ground source heat pump device for villa |
Country Status (1)
| Country | Link |
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| CN (1) | CN110953768B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112880241A (en) * | 2021-02-08 | 2021-06-01 | 南京申风勤贸易有限公司 | Ground source heat pump protective housing device with adjustable size |
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| CN208349628U (en) * | 2018-05-18 | 2019-01-08 | 新乡新奥丽华能源发展有限公司 | A kind of earth source heat pump unit |
| CN109682003A (en) * | 2019-01-22 | 2019-04-26 | 天津大学 | A kind of radiator heating device with fresh air |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES438855A1 (en) * | 1974-07-02 | 1977-02-01 | Renault | Improvements introduced in an automobile vehicle steering control for the absorption of the shocks. (Machine-translation by Google Translate, not legally binding) |
| CN205687571U (en) * | 2016-06-15 | 2016-11-16 | 上海韵申新能源科技有限公司 | A kind of polycrystalline silicon reducing furnace of band internal cooling system |
| CN106152602A (en) * | 2016-08-19 | 2016-11-23 | 中国华电科工集团有限公司 | A kind of combustion gas cold, heat and electricity triple supply and the hybrid system of earth source heat pump |
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| CN109682003A (en) * | 2019-01-22 | 2019-04-26 | 天津大学 | A kind of radiator heating device with fresh air |
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| CN110953768A (en) | 2020-04-03 |
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