CN109798695A - A kind of heat pump, heat pump components and the hot-water heating system using the heat pump components - Google Patents
A kind of heat pump, heat pump components and the hot-water heating system using the heat pump components Download PDFInfo
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- CN109798695A CN109798695A CN201910206122.9A CN201910206122A CN109798695A CN 109798695 A CN109798695 A CN 109798695A CN 201910206122 A CN201910206122 A CN 201910206122A CN 109798695 A CN109798695 A CN 109798695A
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Abstract
The present invention relates to mechanical equipment technical fields, more particularly to a kind of heat pump, heat pump components and use the hot-water heating system of the heat pump components.The heat pump includes: heat pump ontology, and the heat pump body interior forms cylindrical space, is respectively arranged with the first annular projection structure on two end faces of the cylindrical space face, is provided with the first tooth-shape structure on first bulge-structure；Rotary body, the rotary body is set in the cylindrical space by shaft, it can be rotated around the axis of the cylindrical space under the driving of the shaft, the second annular projection structure is provided on the rotary body, is provided with the second tooth-shape structure in the second annular projection structure；Water inlet and water outlet are connected to the cylindrical space, are respectively used to the water inlet and water outlet of the heat pump.The present invention utilizes the rotation of rotary body, makes the first and second annular projection structure and the tooth-shape structure being arranged thereon and water friction, and water is heated in realization, improves the heating efficiency of heat pump.
Description
Technical field
The present invention relates to mechanical equipment technical fields, more particularly to a kind of heat pump, heat pump components and use the heat pump group
The hot-water heating system of part.
Background technique
Boiler is a kind of energy conversion, and the energy inputted to boiler has chemical energy, electric energy in fuel, boiler output
Steam, high-temperature water or organic hot carrier with certain thermal energy.Existing boiler is all to be with coal, oil and combustion gas on the market
Based on fuel, it is both high energy consumption high pollution and discharge carbon dioxide, sulfur dioxide gas, causes very big pollution not save again environment
Can, and there is very big security risk, explosive inflammable easy poisoning and generation fire, and cause a principal element of haze.
Heat pump is a kind of device for forcing heat to flow to from cryogenic object high temp objects with inverse endless form, commonly used in system
Cold or heating.Wherein in the heat pump of water heating for boiler, clean energy resource, non-pollutant discharge, safety system are used
Number is high, is the hot spot in energy study on the transformation field.
But the heat pump efficiency that the prior art provides is low, and it is larger to realize that higher energy conversion efficiency generally requires to consume
Energy, practicability is high.
Summary of the invention
The present invention provides a kind of heat pump, and the heat pump efficiency for being able to solve prior art offer is low, to realize higher energy
Transfer efficiency generally requires to consume biggish energy, the not high problem of practicability.
The embodiments of the present invention are implemented as follows, a kind of heat pump, comprising:
Heat pump ontology, the heat pump body interior form cylindrical space, set respectively on two end faces of the cylindrical space face
It is equipped with the first annular projection structure, is provided with the first tooth-shape structure on first bulge-structure；
Rotary body, the rotary body are set in the cylindrical space by shaft, can be around described under the driving of the shaft
The axis of cylindrical space rotates, and is provided with the second annular projection structure on the rotary body, in the second annular projection structure
It is provided with the second tooth-shape structure；
Water inlet and water outlet are connected to the cylindrical space, are respectively used to the water inlet and water outlet of the heat pump.
In another embodiment of the invention, a kind of heat pump components are provided, the heat pump components include:
Heat pump described in one embodiment as above；And
Driving motor, the power output end of the driving motor are connected with the power intake of the shaft, described for driving
Heat pump rotation.
In another embodiment of the invention, a kind of hot-water heating system is provided, the hot-water heating system includes:
Heat pump components described in one embodiment as above；And
Water system, the water system are connected with the water inlet of the heat pump and water outlet, for supplying water to the heat pump
And the water after the conveying heat pump.
The present invention provides a kind of heat pumps, enter heat pump using water inlet and supply water, using the rotation of rotary body, make first and second
Annular projection structure and the tooth-shape structure being arranged thereon and generation water friction, while liquid water being smashed as particle state, utilization
The heat of generation realizes the heating to water, and tooth-shape structure of the present invention by the first and second annular projection structure of setting and thereon mentions
The high heating efficiency of heat pump.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of heat pump provided in an embodiment of the present invention；
Fig. 2 is heat pump internal structure side view provided in an embodiment of the present invention；
Fig. 3 is a kind of heat pump components schematic diagram provided in an embodiment of the present invention；
Fig. 4 is a kind of hot-water heating system schematic diagram provided in an embodiment of the present invention.
In attached drawing: 1, heat pump ontology；11, the first annular projection structure；12, the first tooth-shape structure；3, rotary body；31,
Two annular projection structures；32, the second tooth-shape structure；4, shaft；5, water inlet；6, water outlet；7, the first axle sleeve；71, bearing；
72, watertight seal；73, oil seal；74, end cap；75, oil filler point；8, the second axle sleeve；9, mounting assembly；91 installation parts；92,
Connector；101, access panel；102, discharge outlet；110, driving motor；120, water system.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The present invention provides a kind of heat pumps, enter heat pump using water inlet 5 and supply water, using the rotation of rotary body, make first and second
Annular projection structure and the tooth-shape structure being arranged thereon and generation water friction, while liquid water being smashed as particle state, utilization
The heat of generation realizes the heating to water, and tooth-shape structure of the present invention by the first and second annular projection structure of setting and thereon mentions
The high heating efficiency of heat pump.
Specific implementation of the invention is described in detail below in conjunction with specific embodiment.
As shown in Figure 1, being the structural schematic diagram of heat pump provided in an embodiment of the present invention, comprising:
Heat pump ontology 1, the heat pump body interior form cylindrical space, set respectively on two end faces of the cylindrical space face
It is equipped with the first annular projection structure 11, is provided with the first tooth-shape structure 12 in the first annular projection structure 11；
Rotary body 3, the rotary body 3 are set in the cylindrical space by shaft 44, can under the driving of the shaft 44
Axis around the cylindrical space rotates, and the second annular projection structure 31 is provided on the rotary body 3, and described second is cyclic annular convex
It rises and is provided with the second tooth-shape structure 32 in structure 31；
Water inlet 55 and water outlet 66, are connected to the cylindrical space, are respectively used to the water inlet and water outlet of the heat pump.
In the present embodiment, cylindrical space is formed inside heat pump ontology 1, it is to be understood that, cylindrical space here refers to cylinder
The space of shape, the circular end face being parallel to each other including two and the surfaces of revolution for connecting two end faces, in the present invention, two
A circular end face center of circle face, the present invention are not construed as limiting the size relation of two circular end faces, it is to be understood that, when two
When circular end face is equal in magnitude, be conducive to fabricate.In the present embodiment, when two parallel circular end faces differ in size
When, the normal vector at any point and the normal vector out of plumb of circular end face on the above-mentioned surfaces of revolution；When two parallel circular end faces
When equal in magnitude, the normal vector at any point and the normal vector of circular flat are vertical on the above-mentioned surfaces of revolution.In the present embodiment,
The center of circle of first annular projection is located on the straight line where the circle center line connecting of two end faces, and the present embodiment is for the first annular projection
And the concrete shape for the first tooth-shape structure 12 being arranged thereon is not construed as limiting.
In the present embodiment, rotary body 3 can rotate under the action of shaft 44 around the axis of cylindrical space, rotary body
It is provided with the second annular projection on 3, the second tooth-shape structure 32 is provided on the second annular projection, it is preferable that the second annular projection
The center of circle be located on the straight line where the circle center line connecting of two end faces.What the present embodiment was arranged for the second annular projection and thereon
The concrete shape of second tooth-shape structure 32 is not construed as limiting.
In this embodiment, heat pump is additionally provided with water inlet 55 and water outlet 66, for the water supply and water outlet of heat pump, originally
Embodiment is not especially limited the specific location and setting form of water inlet 55 and water outlet 66, and basic demand is
Water inlet 55 is connected with water outlet 66 with the cylindrical space of heat pump ontology 1.
The embodiment of the invention provides a kind of heat pump, enters heat pump using water inlet 55 and supply water, using the rotation of rotary body 3,
Make the first and second annular projection structure and the tooth-shape structure being arranged thereon and water friction occurs, while liquid water being smashed as particle
State realizes the heating to water, tooth of the present invention by the first and second annular projection structure of setting and thereon using the heat of generation
Shape structure improves the heating efficiency of heat pump.
In one embodiment of the invention, as shown in Fig. 2, the first annular projection structure 11 is along the straight of the end face
Diameter direction is provided with several layers, is equidistantly positioned between layers, is all provided on each face of the first annular projection structure 11
It is equipped with first tooth-shape structure 12.
In the present embodiment, several layers are arranged along end face diameter direction in the first annular projection structure 11, it should be understood that this reality
Applying diametrical direction in example can be the diameter of 11 its ring structure of the first annular projection structure itself, be also possible to end face diameter,
It can also be the diametrical direction of any one cross section of the surfaces of revolution in one embodiment, three is actually identical.In this implementation
In example, it is equidistantly positioned between each the first annular projection of layer structure 11；Described the is cut by the plane of the cylindrical space axis
Any one the resulting face of one annular projection structure 11, can be triangle, rectangle perhaps other shapes preferably rectangle or
Triangle；The first tooth-shape structure 12 is provided in first annular projection structure 11, the first tooth-shape structure 12 can be by certain
Rule distribution, can also be with random distribution, the invention is not limited in this regard.
The embodiment of the invention provides a kind of heat pumps, by the first annular projection structure 11 of setting and in the first annular projection
First tooth-shape structure 12 is set in structure 11, the friction with water can be increased, and can be by water using the first tooth-shape structure 12
It smashes and a large amount of heat is generated by both effects for particle state, to realize the heating to water, heat pump can be improved
Heating efficiency.
In an embodiment of the invention, the second annular projection structure is arranged along the diametrical direction of the cylindrical space
There are several layers, be equidistantly positioned between layers, second tooth form is provided on each face of second annular projection
Structure.
In the present embodiment, several layers are arranged along cylindrical space diametrical direction in the second annular projection, it should be understood that this implementation
Diametrical direction can be the diameter of second annular projection its ring structure itself in example, is also possible to end face diameter, can also be
The diametrical direction of any one cross section of the surfaces of revolution in above-described embodiment, i.e. cylindrical space diametrical direction, three are actually identical.
In the present embodiment, it is equidistantly positioned between each the second annular projection of layer；It is cut by the plane of the cylindrical space axis described
Any one resulting face of second annular projection can be triangle, rectangle perhaps other shapes preferably rectangle or triangle
Shape；The second tooth-shape structure is provided on second annular projection, the second tooth-shape structure can be to be distributed according to certain rules, can also be with
Random distribution, the invention is not limited in this regard.
In the present embodiment, the second annular projection and the shape of the first annular projection and size can be identical or not
Together, preferred two kinds of set-up modes are as follows: mode one, the first annular projection is identical with the second annular projection size, the two phase
Mutual face setting, and tooth-shape structure is arranged on the face of the first annular projection and the second annular projection face；Mode two, first
Annular projection and the second annular projection size are not exactly the same, and the two is staggered, the first annular projection and two layers second ring-types
The concave-convex staggered space in space between space face between protrusion, i.e. the first annular projection and the second annular projection, first
The face of annular projection and the second annular projection face is ring rotation face, and tooth-shape structure is provided on face.Above is only this
Two kinds of specific embodiments that embodiment provides, both setting forms can produce stronger friction and fragmentation, mention
The generation of high heat, the specific implementation being not intended to limit the present invention.
The embodiment of the invention provides a kind of heat pumps, are arranged by the second annular projection of setting and on the second annular projection
Second tooth-shape structure, can increase the friction with water, and using the second tooth-shape structure can by water attack it is broken be particle state, together
When the first and second annular projection match, the first and second tooth-shape structure at least partly matches, and a large amount of heat is generated, to realize
The heating efficiency of heat pump can be improved in heating to water.
In one embodiment of the invention, as shown in Fig. 2, the first and second annular projection structure offers several lack
Mouth 13, for reducing the deflection after first tooth-shape structure is heated.
In the present embodiment, in the heat pump course of work, pump in generate a large amount of heat, be easy so that annular projection structure or
Person's tooth-shape structure temperature distortion is easy when annular projection structure or tooth-shape structure more close at cooperation due to deforming
It collides, causes annular projection structure and/or tooth-shape structure impaired, thermal stress can be discharged by opening up notch 13.It needs
Understanding, the position that opens up of notch 13 can be the same or different in each layer annular projection structure, and it is preferably identical, and edge
Circumferentially it is uniformly arranged.
The embodiment of the invention provides a kind of heat pumps, by opening up notch 13 on annular projection, can discharge thermal stress,
It avoids the temperature distortion of annular projection structure and is damaged, improve the service life of heat pump.
In an embodiment of the invention, as shown in Figure 1, the both ends of the rotary shaft 4 pass through the heat pump ontology 1, two
End is connect by the first axle sleeve 7 with the second axle sleeve 8 with the heat pump ontology 1 respectively；
Bearing 71, watertight seal 72 and oil seal 73, one end of first axle sleeve 7 are provided in first axle sleeve 7
It is connect with the heat pump ontology 1, the other end is provided with end cap 74, is additionally provided with oil filler point 75 on first axle sleeve 7；
Bearing 71, watertight seal 72 and oil seal 73, one end of second axle sleeve 8 are provided in second axle sleeve 8
It is connect with the heat pump ontology 1, oil filler point 75 is additionally provided on first axle sleeve 7, the power intake of the shaft 4 passes through
Second axle sleeve 8.
In the present embodiment, the prominent heat pump ontology 1 of shaft 4 is arranged, and both ends pass through axle sleeve respectively and connect with heat pump ontology 1,
The water that being set to water-stop can be effectively prevented in heat pump flows out, and water may be implemented in setting oil seal is isolated with oily, and axle sleeve
Upper setting can guarantee the normal work of bearing 71 to 71 oiling of bearing in oil filler point 75.It should be appreciated that due to rotary body 3 with
The axis of cylindrical space is rotation center, and rotary body 3 is driven by shaft 4, and the inevitable axis with cylindrical space of axis of shaft 4
Line is overlapped.Rotary body 3 can be wholely set with shaft 4, can also pass through locating piece, firm part and locking piece etc. and shaft 4
It is fixed, the present embodiment to this with no restriction.
The embodiment of the invention provides a kind of heat pump, shaft 4 is connect with heat pump ontology 1 by axle sleeve, and is provided with water
Sealing and oil seal can be effectively prevented the leakage of water, oil, guarantee the normal work of heat pump.
In an embodiment of the invention, as shown in Figure 1, first axle sleeve 7 and/or the second axle sleeve 8 offer it is described
Water inlet 5, the water inlet 5 are connected to the cylindrical space, for filling the water into the heat pump.
In the present embodiment, water inlet 5 is opened on axle sleeve, it will be understood that water channel, and water channel and column are offered in axle sleeve
Shape space is connected, and can supply water from axle sleeve into heat pump.Axle sleeve includes the first axle sleeve 7 and the second axle sleeve 8, correspondingly,
One or two can be set in water inlet 5.Due to remoter apart from 4 axis of shaft in heat pump, friction and fragmentation are stronger,
By the way that water inlet 5 to be set on axle sleeve, the centrifugal force that rotation generates, the friction and fragmentation for being subject to water can use
Gradually enhance, is conducive to stablizing for heat pump work and carries out.
The embodiment of the invention provides a kind of heat pumps, by opening up water inlet 5 on axle sleeve, so that the water into heat pump can
It gradually to heat up, ensure that the course of work smoothly carries out, be conducive to improve heat pump service life.
In one embodiment of the invention, as shown in Figure 1, the heat pump further includes mounting assembly 9, the mounting assembly
9 include installation part 91 and connector 92；
The installation part 91 offers mounting hole, the fixed installation for the heat pump；
Described 92 one end of connector is set on the installation part 91, and the other end is set on the heat pump ontology 1, for described
The support of heat pump ontology 1.
In the present embodiment, fixed installation of the installation part 91 for heat pump and ground or other reference for installation, due to peace
The benchmark of dress is different, can be the concrete forms such as mounting base, installation sliding rail, mounting leg.Mounting hole can be unthreaded hole can also
To be threaded hole, this can be selected as needed, the present embodiment to this with no restriction.Connector 92 is for installation part 91 and heat pump sheet
Connection between body 1 can be welding with the connection of heat pump ontology 1, be threadedly coupled, connector 92 can with column structure,
The structure of plate structure or other forms, the invention is not limited in this regard.As a kind of optional specific embodiment, heat pump
The axis of cylindrical space is parallel to the ground after being installed by mounting assembly 9, and water inlet 5 is set on axle sleeve, and water outlet 6 is set
It is placed in side of the heat pump ontology 1 backwards to ground.
The embodiment of the invention provides a kind of heat pumps, can carry out installation fixation to heat pump by mounting assembly 9, guarantee it
The course of work it is steady.
In one embodiment of the invention, as shown in Figure 1, the heat pump further includes maintenance structure, the maintenance structure
Including the access hole being set on the heat pump ontology 1 and discharge outlet 102.
In the present embodiment, by taking the axis of cylindrical space after heat pump is installed is parallel to the ground as an example, access hole be can be set
In heat pump ontology 1 backwards to the side on ground, and it is provided with access panel 101 on access hole, water outlet 6 is provided on access panel 101；
Discharge outlet 102 is preferably disposed on side of the heat pump ontology 1 towards ground, can will be hot by discharge outlet 102 when overhauling heat pump
Water in pump is completely exhausted out.
The embodiment of the invention provides a kind of heat pumps, carry out maintenance dimension to heat pump with can be convenient by the way that detection structure is arranged
Shield, and structure is simple, it is easily fabricated.
One embodiment of the invention additionally provides a kind of heat pump components, as shown in figure 3, the heat pump components include:
Heat pump as described in any above embodiment；And
Driving motor 110, the power output end of the driving motor 110 is connected with the power intake of the shaft 4, for driving
Move the heat pump rotation.
In the present embodiment, the power output end of driving motor 110 is connected with the power intake of shaft 4, such as passes through
Shaft coupling connection.Preferably, on the installation part 91 for being fixedly installed in heat pump of driving motor 110, pass through installation part 91 and heat pump
It is fixedly installed on ground or other benchmark, whole stability can be enhanced, reduce operation vibration.In the present invention, it drives
Dynamic motor 110 can be direct current generator, and perhaps alternating current generator can be synchronous motor or asynchronous machine, may be equipped with positive and negative
Modulation regulating device, the invention is not limited in this regard.
Specific embodiment: driving motor power 37KW, rotary body revolving speed are 4000 turns/min, and disengaging water temperature difference can achieve
15 DEG C, 3.3 tphs of flow, heating rate is exceedingly fast, and the thermal efficiency is far more than the thermal efficiency of electrically heated rod；Also, with water temperature
Rising, current value is gradually reduced: 69A when current value when water temperature is at 20 DEG C, when water temperature reaches 100 DEG C, current value drops to
48A, range of decrease degree are 30.4%；3.3 tons of water are heated using the electrical bar that power is 37KW, other operating conditions are identical, as a result are as follows: electric current
Value has reached 74A, increases 7%.
The embodiment of the invention provides a kind of heat pump components, by motor-driven rotatable shaft 4, so that rotary body is driven to rotate,
Using the effect of annular projection structure and tooth-shape structure, realizes the friction to water and be crushed, to generate heat, realize water
Heating, improve the efficiency of heating.
The embodiment of the invention also provides a kind of hot-water heating systems, as shown in figure 4, the hot-water heating system includes:
Heat pump components described in one embodiment as above；And
Water system 120, the water system are connected with the water inlet 5 of the heat pump and water outlet 6, are used for the heat pump
Water after supplying water and conveying the heat pump.
In the present embodiment, water system 120 may include water supply pump and/or water-delivery pump, the water inlet 5 of the former and heat pump
It is connected, is used for heat pump for supplying water at low temperature；The latter is connected with the water outlet 6 of heat pump, for conveying the high-temperature water exported from heat pump.
It is appreciated that low temperature and height herein is that in contrast, the temperature difference between the two is equal to the raised temperature of water under the action of heat pump
Degree.
The embodiment of the invention provides a kind of hot-water heating systems, are heated using heat pump to water, heat with conventional boiler
It compares, does not generate disposal of pollutants, it is high-efficient, securely and reliably.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of heat pump, which is characterized in that the heat pump includes:
Heat pump ontology, the heat pump body interior form cylindrical space, set respectively on two end faces of the cylindrical space face
It is equipped with the first annular projection structure, is provided with the first tooth-shape structure on first bulge-structure；
Rotary body, the rotary body are set in the cylindrical space by shaft, can be around described under the driving of the shaft
The axis of cylindrical space rotates, and is provided with the second annular projection structure on the rotary body, in the second annular projection structure
It is provided with the second tooth-shape structure；
Water inlet and water outlet are connected to the cylindrical space, are respectively used to the water inlet and water outlet of the heat pump.
2. heat pump as described in claim 1, which is characterized in that diametrical direction of first annular projection along the end face is set
Several layers are equipped with, are equidistantly positioned between layers, first tooth is provided on each face of first annular projection
Shape structure.
3. heat pump as claimed in claim 1 or 2, which is characterized in that the second annular projection structure is along the cylindrical space
Diametrical direction be provided with several layers, be equidistantly positioned, be respectively provided on each face of second annular projection between layers
There is second tooth-shape structure.
4. heat pump as described in claim 1, which is characterized in that the first and second annular projection structure offers several notches,
For reducing the deflection after first tooth-shape structure is heated.
5. heat pump as described in claim 1, which is characterized in that the both ends of the rotary shaft pass through the heat pump ontology, both ends
It is connect respectively by the first axle sleeve with the second axle sleeve with the heat pump ontology；
Bearing, watertight seal and oil seal, one end of first axle sleeve and the heat are provided in first axle sleeve
Ontology connection is pumped, the other end is provided with end cap, and the first axle, which is put on, is additionally provided with oil filler point；
Bearing, watertight seal and oil seal, one end of second axle sleeve and the heat are provided in second axle sleeve
Ontology connection is pumped, the first axle, which is put on, is additionally provided with oil filler point, and the power intake of the shaft passes through second axle sleeve.
6. heat pump as claimed in claim 5, which is characterized in that first axle sleeve and/or the second axle sleeve offer it is described into
The mouth of a river, the water inlet are connected to the cylindrical space, for filling the water into the heat pump.
7. heat pump as described in claim 1, which is characterized in that the heat pump further includes mounting assembly, the mounting assembly packet
Include installation part and connector；
The installation part offers mounting hole, the fixed installation for the heat pump；
Described connector one end is set on the installation part, and the other end is set on the heat pump ontology, is used for the heat pump
The support of ontology.
8. heat pump as described in claim 1, which is characterized in that the heat pump further includes maintenance structure, the maintenance structure packet
Include the access hole being set on the heat pump ontology and discharge outlet.
9. a kind of heat pump components, which is characterized in that the heat pump components include:
Such as the described in any item heat pumps of claim 1 ~ 8；And driving motor, the power output end of the driving motor with it is described
The power intake of shaft is connected, for driving the heat pump to rotate.
10. a kind of hot-water heating system, which is characterized in that the hot-water heating system includes:
Heat pump components as claimed in claim 9；And water system, the water inlet of the water system and the heat pump and
Water outlet is connected, for the water after supplying water and conveying the heat pump to the heat pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910206122.9A CN109798695A (en) | 2019-03-19 | 2019-03-19 | A kind of heat pump, heat pump components and the hot-water heating system using the heat pump components |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910206122.9A CN109798695A (en) | 2019-03-19 | 2019-03-19 | A kind of heat pump, heat pump components and the hot-water heating system using the heat pump components |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028638A (en) * | 2019-12-24 | 2021-06-25 | 崔成国 | Friction head and boiler comprising same |
-
2019
- 2019-03-19 CN CN201910206122.9A patent/CN109798695A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028638A (en) * | 2019-12-24 | 2021-06-25 | 崔成国 | Friction head and boiler comprising same |
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