CN108826429B - House heating method - Google Patents
House heating method Download PDFInfo
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- CN108826429B CN108826429B CN201810745625.9A CN201810745625A CN108826429B CN 108826429 B CN108826429 B CN 108826429B CN 201810745625 A CN201810745625 A CN 201810745625A CN 108826429 B CN108826429 B CN 108826429B
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- pipe
- descaling
- heat absorption
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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
- F24D13/00—Electric heating systems
- F24D13/04—Electric heating systems using electric heating of heat-transfer fluid in separate units of the system
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- General Engineering & Computer Science (AREA)
- Cleaning By Liquid Or Steam (AREA)
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Abstract
The invention belongs to the technical field of heating, in particular to a house heating method, which uses a water source heat pump system, wherein the water source heat pump system comprises a main pipeline, a compression pump, a hot water converter, a heat absorption branch pipe and a descaling module; the main pipeline is connected with a compression pump in series; the outlet of the compression pump is connected with a hot water converter; the inlet of the compression pump is connected with the descaling module; the descaling module comprises an installation pipe, a vibrator, a descaling pipe and a blowdown valve; the bottom of the mounting pipe is fixedly connected with a scale discharging pipe; a drain valve is arranged at the bottom of the dirt discharge pipe; the outlets of the heat absorption branch pipes are obliquely arranged, and the inlets of the heat absorption branch pipes are arranged on the lower side of the underground water line; an ultrasonic generator with a floater is arranged in the heat absorption branch pipe; the ultrasonic generator is arranged on a horizontal plane. Indoor heating can be realized through the water source heat pump system.
Description
Technical Field
The invention belongs to the technical field of heating, and particularly relates to a house heating method.
Background
Indoor heating is a technology of manually supplying heat to the indoor space to keep the indoor space at a certain temperature so as to create a suitable living condition or working condition. Indoor heating has multiple modes, and a water source heat pump system is also one of the modes. The water source heat pump is a technology for realizing the transfer of low-level heat energy to high-level heat energy by utilizing low-level heat energy resources formed by utilizing solar energy and geothermal energy absorbed in shallow water sources on the earth surface, such as underground water, rivers and lakes, and adopting a heat pump principle and inputting a small amount of high-level electric energy. Therefore, compared with the traditional indoor heating mode, the water source heat pump system has the advantages of low cost, energy conservation, environmental protection, high efficiency and the like.
Some technical solutions of water source heat pump systems also appear in the prior art, for example, a chinese patent with application number 20991508825 discloses a water source heat pump system, which includes a main line pipe, a compression pump and a hot water converter with a hot water outlet, and its technical essential lies in: the main pipeline is connected with a compression pump in series, an outlet of the compression pump is connected with a hot water converter with a hot water outlet, the main pipeline is also connected with heat absorption branch pipes which are uniformly distributed in parallel, water inlet ends of the heat absorption branch pipes are arranged on the lower side of an underground water line, and ultrasonic generators or water mist stirring pumps are arranged in the heat absorption branch pipes. The invention utilizes the heat radiation principle of energy, firstly uses an ultrasonic generator to change water into water mist at normal temperature, the water mist absorbs heat and is finally converted into superheated steam, finally the water in a hot water converter is heated, and the heated hot water can be used as domestic hot water. The invention has the advantages of high heat exchange rate, difficult scaling of the system, convenient maintenance, simple whole structure, low manufacturing cost and long service life of equipment.
This technical scheme can realize high heat exchange rate, but when the water source that contains alkali and is big uses, can the scale deposit in the pipeline to the scale deposit also can be more and more along with the increase of live time, and then influences the normal work of water source heat pump system.
Disclosure of Invention
In order to make up the defects of the prior art, the invention provides a house heating method, a water source heat pump system used in the method is characterized in that a descaling module is connected in series between a heat absorption branch pipe and a main pipeline bracket, the descaling module comprises an installation pipe, a vibrator, a descaling pipe and a blow-down valve, and the outlet of the heat absorption branch pipe is obliquely arranged; the water vapor is guided to the mounting pipe through the outlet of the heat absorption branch pipe, when scale deposits in the mounting pipe, the vibrator in the mounting pipe is electrified to work, the internal vibration spring shakes, and the scale deposits fall to the scale removal pipe; meanwhile, the drain valve is opened in a matching way, so that scale is removed; meanwhile, the outlets of the heat absorption branch pipes are obliquely arranged; a hemispherical cover plate is arranged at the outlet of the heat absorption branch pipe, so that pollution to the outlet of the heat absorption branch pipe in the sewage discharge process is avoided; an elastic descaling plate is oppositely arranged in the cover plate; simultaneously at the inside scale deposit groove that sets up of apron to at the inside elasticity wave strip that sets up of scale deposit groove, thereby through elasticity scale removal board, the cooperation of the elasticity wave strip in scale deposit groove and the scale deposit groove realizes the inside incrustation scale accumulation of hemispherical apron and then realizes getting rid of incrustation scale.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a house heating method, which comprises the following steps:
the method comprises the following steps: adding heat insulation materials into the partition boards of the house;
step two: laying a heating pipeline in the room of the first house;
step three: connecting the heating pipeline in the second step with a heat exchanger in a water source heat pump system;
step four: installing an adjusting valve on the pipeline of the water source heat pump system in the third step to adjust the indoor temperature;
the water source heat pump system comprises a main pipeline, a compression pump, a hot water converter, a heat absorption branch pipe and a descaling module; the main pipeline is connected with a compression pump in series; the outlet of the compression pump is connected with a hot water converter with a hot water outlet; the inlet of the compression pump is connected with the descaling module; the descaling module comprises an installation pipe, a vibrator, a descaling pipe and a blowdown valve; the bottom of the mounting pipe is arranged to be conical; the bottom of the mounting pipe is fixedly connected with a scale discharging pipe; a drain valve is arranged at the bottom of the dirt discharge pipe; one side of the scale removing pipe is connected with a heat absorption branch pipe; the vibrator is connected to the inside of the mounting pipe through a vibration spring; the outlets of the heat absorption branch pipes are obliquely arranged, and the inlets of the heat absorption branch pipes are arranged on the lower side of the underground water line; an ultrasonic generator with a floater or a water mist stirring pump with a floater is arranged in the heat absorption branch pipe; the ultrasonic generator or the water mist stirring pump is arranged on a horizontal plane. When the water heater is used, water at normal temperature enters the heat absorption branch pipe through the inlet of the heat absorption branch pipe, and the ultrasonic generator in the heat absorption branch pipe is electrified to work; changing water into water mist; meanwhile, the compression pump works to form slight negative pressure, and water mist absorbs heat and becomes water vapor after entering the heat absorption branch pipe; the water vapor is led to the hot water converter from the top of the mounting pipe through the compression pump outlet, so that the water in the hot water converter is heated, and the hot water converter can be used as domestic water for heating and the like.
Preferably, the vibration spring is sleeved with a scale plate at equal distance; the two ends of the fouling plate are bent in an S shape. When the device is used, water vapor enters the installation pipe, the vibration spring in the installation pipe is sleeved with the scale depositing plate, and two ends of the scale depositing plate are bent in an S shape, so that better scale depositing is facilitated.
Preferably, a steel ball is arranged between the two scaling plates and is connected to the vibrating spring through a spring. When in use, the vibrator is electrified, and the vibration spring in the installation pipe is sleeved with the scale depositing plate; meanwhile, on the vibration springs among the equidistant fouling plates, the steel balls welded through the springs can swing along with the vibration springs to gradually impact the fouling plates on two sides, so that the fouling in the installation pipe can be cleaned.
Preferably, the outlet of the heat absorption branch pipe is provided with a cover plate, and the cover plate is hemispherical; the upper end of the cover plate is hinged on the scale removing pipe. When the device is used, the scale deposits fall to the scale discharge pipe from the bottom of the installation pipe, and a drain valve connected to the bottom of the scale discharge pipe is opened; in the descaling process of the descaling module, the cover plate covers the outlet of the heat absorption branch pipe, so that the pollution of accumulated scale to the outlet of the heat absorption branch pipe can be avoided.
Preferably, the end face of the cover plate is provided with a rubber pad. When the cover plate is used, in the process that the cover plate prevents accumulated dirt from polluting the outlet of the heat absorption branch pipe, the rubber pad enhances the airtightness, and a better antifouling effect can be achieved.
Preferably, the inner cavity of the cover plate is relatively provided with an elastic descaling plate, and the elastic descaling plate is arc-shaped; one end of the elastic descaling plate is fixedly connected to the descaling pipe. When in use, the elastic descaling plate arranged in the cover plate in the opposite direction works along with the opening and closing of one end of the cover plate; the elastic descaling plate slides relative to the cover plate, so that scale inside the cover plate can be removed.
Preferably, a scale depositing groove is arranged on the inner cavity of the cover plate; the scale depositing groove is rectangular. During the use, during vapor lets in the installation pipe process from the heat absorption branch pipe export, it is provided with the scaling groove to cover inside the apron at the heat absorption branch pipe export, can make the incrustation scale accumulation in the scaling groove.
Preferably, an elastic wave strip is arranged in the scale depositing groove; the elastic wave strip is matched with the elastic descaling plate for use. During the use, set up elastic wave strip in the dirt removing groove, can slide in the dirt removing groove with the cooperation of elasticity scale removal board to can strengthen the scale removal effect.
Preferably, the top of the cross section of the elastic descaling plate is a circular arc-shaped bulge. When in use, the arc-shaped bulge of the elastic descaling plate is not easy to scale.
Preferably, the vibrator is powered by a solar panel. When the vibrator is used, the solar cell panel is arranged on the upper side of the installation pipe, power can be supplied to the vibrator, and resources can be saved.
The invention has the following beneficial effects:
1. the invention relates to a house heating method, wherein a water source heat pump system used in the method is connected with a descaling module in series on a main line pipeline, the descaling module comprises an installation pipe, a vibrator, a descaling pipe and a blow-down valve, and the outlet of a heat absorption branch pipe is obliquely arranged; when water vapor is guided into the installation pipe through the outlet of the heat absorption branch pipe and scales are accumulated in the installation pipe, the vibrator in the installation pipe is electrified to work, the internal vibration spring shakes, and the scales fall to the scale removal pipe; simultaneously, the blowoff valve is matched to be opened, and then the scale is removed.
2. The invention relates to a house heating method, wherein a water source heat pump system is sleeved with scale depositing plates on vibration springs inside an installation pipe, and steel balls are oppositely welded on the vibration springs between the scale depositing plates which are connected at equal intervals through springs; when water vapor enters the installation pipe and scales are accumulated in the installation pipe, the vibrator is electrified to work; the shaking spring shakes to drive the scale depositing plate to shake and the steel balls to shake; meanwhile, the steel balls shake to gradually impact the scale depositing plate, so that scale on the scale depositing plate falls off, and the scale depositing plate is matched with the opening of the blow-down valve to remove the scale.
3. According to the method for heating the house, the hemispherical cover plate is arranged at the outlet of the heat absorption branch pipe which is obliquely arranged, and one end of the cover plate is hinged to the scale removal pipe, so that the pollution of the outlet of the heat absorption branch pipe in the sewage discharge process is avoided; meanwhile, a scale depositing groove is arranged in the hemispherical cover plate, and an elastic wave strip is arranged in the scale depositing groove; elastic descaling plates are arranged in the hemispherical cover plates in opposite directions; after the incrustation scale accumulates in the dirt removing groove, through the opening and closing of hemispherical apron, the cooperation of elasticity wave strip and elasticity scale removal board slides in the dirt removing groove, and then realizes cleaing away of incrustation scale.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a schematic diagram of the construction of a water source heat pump system for use in the present invention;
FIG. 3 is an enlarged view at B in FIG. 2;
FIG. 4 is a connection diagram of the elastic wave strip and the elastic descaling plate;
in the figure: the device comprises a main pipeline 1, a compression pump 2, a hot water converter 3, a heat absorption branch pipe 4, a descaling module 5, a mounting pipe 51, a vibrator 52, a descaling plate 521, steel balls 522, a descaling pipe 53, a blowdown valve 54, an ultrasonic generator 6, a cover plate 7, a rubber pad 71, an elastic descaling plate 72, a descaling groove 73 and an elastic wave strip 74.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 4, the method for heating a house according to the present invention includes the steps of:
the method comprises the following steps: adding heat insulation materials into the partition boards of the house;
step two: laying a heating pipeline in the room of the first house;
step three: connecting the heating pipeline in the second step with a heat exchanger in a water source heat pump system;
step four: installing an adjusting valve on the pipeline of the water source heat pump system in the third step to adjust the indoor temperature;
the water source heat pump system comprises a main pipeline 1, a compression pump 2, a hot water converter 3, a heat absorption branch pipe 4 and a descaling module 5; a compression pump 2 is connected in series on the main pipeline 1; the outlet of the compression pump 2 is connected with a hot water converter 3; the inlet of the compression pump 2 is connected with a descaling module 5; the descaling module 5 comprises a mounting pipe 51, a vibrator 52, a descaling pipe 53 and a blowdown valve 54; the bottom of the mounting pipe 51 is provided with a taper; the bottom of the mounting pipe 51 is fixedly connected with a dirt discharge pipe 53; a drain valve 54 is arranged at the bottom of the dirt discharge pipe 53; one side of the dirt discharge pipe 53 is connected with the heat absorption branch pipe 4; the vibrator 52 is connected to the inside of the mounting tube 51 through a vibration spring 55; the outlet of the heat absorption branch pipe 4 is obliquely arranged, and the inlet of the heat absorption branch pipe 4 is arranged at the lower side of the underground water level line; an ultrasonic generator 6 with a floater or a water mist stirring pump with a floater is arranged in the heat absorption branch pipe 4; the ultrasonic generator 6 or the water mist stirring pump is arranged on a horizontal plane. When the water heater is used, water at normal temperature enters the heat absorption branch pipe 4 through the inlet of the heat absorption branch pipe 4, and the ultrasonic generator in the heat absorption branch pipe 4 is electrified to work; changing water into water mist; meanwhile, the compression pump 2 works to form slight negative pressure, and water mist absorbs heat and is changed into water vapor after entering the heat absorption branch pipe 4; the water vapor is led from the top of the mounting pipe 51 to the hot water converter 3 through the outlet of the compression pump 2, so that the water in the hot water converter 3 is warmed up and can be used as domestic water for heating and the like.
In one embodiment of the present invention, a scale plate 521 is sleeved on the vibration spring 55 at equal distance; the two ends of the fouling plate 521 are bent in an S shape. During the use, vapor gets into installation pipe 51, and during the interior scaling of installation pipe 51, cup jointed scaling board 521 on the vibrations spring 55 in installation pipe 51, scaling board 521 both ends are the S-shaped bending and are favorable to better scaling.
In one embodiment of the present invention, a steel ball 522 is disposed between the two scaling plates 521, and the steel ball 522 is connected to the vibration spring 55 through a spring. When the device is used, water vapor enters the installation pipe 51, and the vibrator 52 is electrified to work when scale deposits are accumulated in the installation pipe 51; a scale plate 521 is sleeved on the vibration spring 55; meanwhile, on the vibration springs 55 among the equally-spaced fouling plates 521, the steel balls 522 welded through the springs can swing along with the shaking of the vibration springs 55 and gradually impact the fouling plates 521 on two sides, so that the fouling in the installation pipe 51 can be cleaned.
As an embodiment of the present invention, the outlet of the heat absorption branch pipe 4 is provided with a cover plate 7, and the cover plate 7 is hemispherical; the upper end of the cover plate 7 is hinged on the dirt discharge pipe 53. When the device is used, the scale deposits fall to the scale discharge pipe 53 from the bottom of the installation pipe 51, and the drain valve 54 connected with the bottom of the scale discharge pipe 53 is opened; in the process of descaling the descaling module 5, the cover plate 7 covers the outlet of the heat absorption branch pipe 4, so that the pollution of the accumulated scale to the outlet of the heat absorption branch pipe 4 can be avoided.
In one embodiment of the present invention, a rubber pad 71 is disposed on an end surface of the cover plate 7. When the cover plate 7 is used, in the process that the cover plate 7 prevents the outlet of the heat absorption branch pipe 4 from being polluted by accumulated dirt, the rubber gasket 71 enhances the airtightness and can have a better antifouling effect.
As an embodiment of the present invention, an elastic descaling plate 72 is oppositely arranged on the inner cavity of the cover plate 7, and the elastic descaling plate 72 is arc-shaped; one end of the elastic descaling plate 72 is fixedly connected to the descaling pipe 53. When in use, the elastic descaling plate 72 arranged in the cover plate 7 in the opposite direction works along with the opening and closing of one end of the cover plate 7; the elastic descaling plate 72 slides relative to the cover plate 7, so that scale inside the cover plate 7 can be removed.
In one embodiment of the present invention, a dirt collecting groove 73 is provided in the inner cavity of the cover plate 7, and the dirt collecting groove 73 has a rectangular shape. When the heat absorbing pipe 51 is used, in the process of introducing steam from the outlet of the heat absorbing branch pipe 4 into the mounting pipe 51, the scale depositing groove 73 is provided inside the cover plate 7 covering the outlet of the heat absorbing branch pipe 4, and scale can be accumulated in the scale depositing groove 73.
In one embodiment of the present invention, an elastic wave strip 74 is provided in the scale depositing tank 73; the elastic wave strip 74 is matched with the elastic descaling plate 72 for use. When the descaling device is used, the elastic wave strip 74 is arranged in the descaling groove 73 and can be matched with the elastic descaling plate 72 to slide in the descaling groove 73, so that the descaling effect can be enhanced.
In one embodiment of the present invention, the top of the cross section of the elastic descaling plate 72 is a circular arc protrusion. When in use, the arc-shaped bulge of the elastic descaling plate 72 is not easy to scale.
In one embodiment of the present invention, the vibrator 52 is powered by a solar panel. When in use, the solar cell panel is arranged on the upper side of the mounting pipe 51, so that power can be supplied to the vibrator 52, and resources can be saved.
When the water heater is used, water at normal temperature enters the heat absorption branch pipe 4 through the inlet of the heat absorption branch pipe 4, and the ultrasonic generator 6 in the heat absorption branch pipe 4 is electrified to work; changing water into water mist; meanwhile, the compression pump 2 works to form slight negative pressure, and water mist absorbs heat and is changed into water vapor after entering the heat absorption branch pipe 4; the water vapor is led to the hot water converter 3 from the top of the installation pipe 51 through the outlet of the compression pump 2, so that the water with the hot water converter 3 is heated, and the water can be used as domestic water for heating and the like; meanwhile, the scaling plates 521 are sleeved on the vibration springs 55, and steel balls 522 are oppositely welded on the vibration springs 55 among the equally-spaced scaling plates 521 through springs; when the scale deposits in the installation pipe 51, the vibrator 52 is electrified to work; the shaking spring 55 shakes to drive the scaling plate 521 to shake and the steel balls 522 to shake; meanwhile, the steel balls 522 shake to gradually impact the scale depositing plate 521, so that scale on the scale depositing plate 521 falls to the scale discharging pipe 53, and the blow-down valve 54 connected to the bottom of the scale discharging pipe 53 is opened, so that scale removal is realized; a cover plate 7 is arranged at the outlet of the heat absorption branch pipe 4 which is obliquely arranged, and one end of the cover plate 7 is hinged on the scale removal pipe 53, so that the pollution of the outlet of the heat absorption branch pipe 4 in the process of descaling is avoided; meanwhile, a fouling groove 73 is arranged in the cover plate 7, and an elastic wave strip 74 is arranged in the fouling groove 73; and an elastic descaling plate 72 is arranged in the cover plate 7 in the opposite direction; after the scale is accumulated in the scale depositing groove 73, the elastic wave strip 74 and the elastic scale removing plate 72 are matched to slide in the scale depositing groove 73 through the opening and closing of the cover plate 7, and then the scale is removed.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A method of heating a building, the method comprising the steps of:
the method comprises the following steps: adding heat insulation materials into the partition boards of the house;
step two: laying a heating pipeline in the room of the first house;
step three: connecting the heating pipeline in the second step with a heat exchanger in a water source heat pump system;
step four: installing an adjusting valve on the pipeline of the water source heat pump system in the third step;
the water source heat pump system comprises a main pipeline (1), a compression pump (2), a hot water converter (3), a heat absorption branch pipe (4) and a descaling module (5); a compression pump (2) is connected in series on the main pipeline (1); the outlet of the compression pump (2) is connected with a hot water converter (3); the inlet of the compression pump (2) is connected with a descaling module (5); the descaling module (5) comprises a mounting pipe (51), a vibrator (52), a descaling pipe (53) and a blowdown valve (54); the bottom of the mounting pipe (51) is arranged to be conical; the bottom of the mounting pipe (51) is fixedly connected with a scale discharging pipe (53); a drain valve (54) is arranged at the bottom of the dirt discharge pipe (53); one side of the dirt discharge pipe (53) is connected with a heat absorption branch pipe (4); the vibrator (52) is connected inside the mounting pipe (51) through a vibration spring (55); the outlets of the heat absorption branch pipes (4) are obliquely arranged, and the inlets of the heat absorption branch pipes (4) are arranged on the lower side of the underground water line; an ultrasonic generator (6) with a floater or a water mist stirring pump with a floater is arranged in the heat absorption branch pipe (4); the ultrasonic generator (6) or the water mist stirring pump is arranged on a horizontal plane;
the vibration spring (55) is sleeved with a scale plate (521) at equal distance; the two ends of the fouling plate (521) are bent in an S shape;
a steel ball (522) is arranged between the two scaling plates (521), and the steel ball (522) is connected to the vibrating spring (55) through a spring;
a cover plate (7) is arranged at the outlet of the heat absorption branch pipe (4), and the cover plate (7) is hemispherical; the upper end of the cover plate (7) is hinged on the scale discharge pipe (53);
an elastic descaling plate (72) is arranged on the inner cavity of the cover plate (7) relatively, and the elastic descaling plate (72) is arc-shaped; one end of the elastic descaling plate (72) is fixedly connected to the descaling pipe (53);
a scale depositing groove (73) is arranged on the inner cavity of the cover plate (7); the scale depositing groove (73) is rectangular;
an elastic wave strip (74) is arranged in the scale depositing groove (73); the elastic wave strip (74) is matched with the elastic descaling plate (72) for use.
2. A method of heating a room as claimed in claim 1, wherein: the end face of the cover plate (7) is provided with a rubber pad (71).
3. A method of heating a room as claimed in claim 1, wherein: the top of the cross section of the elastic descaling plate (72) is an arc-shaped bulge.
4. A method of heating a room as claimed in claim 1, wherein: the vibrator (52) is powered by a solar panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810745625.9A CN108826429B (en) | 2018-07-09 | 2018-07-09 | House heating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810745625.9A CN108826429B (en) | 2018-07-09 | 2018-07-09 | House heating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108826429A CN108826429A (en) | 2018-11-16 |
| CN108826429B true CN108826429B (en) | 2020-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810745625.9A Active CN108826429B (en) | 2018-07-09 | 2018-07-09 | House heating method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111637519B (en) * | 2019-05-27 | 2021-11-19 | 乌苏市鼎盛热力有限责任公司 | Ground heating descaling device for public places |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB181159A (en) * | 1921-03-29 | 1922-06-15 | Frank Gilman | Improvements in pneumatic and like hand tools for scaling tubes |
| CN2445210Y (en) * | 2000-04-10 | 2001-08-29 | 三河市燕京新技术研究所 | Float hob scaler |
| CN101818939B (en) * | 2010-04-20 | 2012-07-04 | 奉政一 | Water-ground-source heat pump system |
| CN203163591U (en) * | 2013-04-02 | 2013-08-28 | 薛振峰 | Descaling device of heat exchanger |
| CN203642482U (en) * | 2014-01-03 | 2014-06-11 | 济宁圣源环境系统工程有限公司 | Heat energy receiver of heat pump |
| CN207026034U (en) * | 2017-05-15 | 2018-02-23 | 张德志 | Inner-walls of duct cleaning tool |
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2018
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